/* roulang page: index */
:root {
            --bg-primary: #060A14;
            --bg-secondary: #0B1120;
            --bg-elevated: rgba(15, 23, 42, 0.6);
            --bg-glass: rgba(255, 255, 255, 0.04);
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(56, 189, 248, 0.25);
            --primary: #06B6D4;
            --primary-hover: #22D3EE;
            --primary-dim: rgba(6, 182, 212, 0.15);
            --secondary: #8B5CF6;
            --accent: #F59E0B;
            --text-primary: #E2E8F0;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --success: #10B981;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 24px rgba(6, 182, 212, 0.15);
            --shadow-glow-strong: 0 0 32px rgba(6, 182, 212, 0.3);
            --font-sans: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", system-ui, -apple-system, sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-family: var(--font-sans);
            line-height: 1.6;
            overflow-x: hidden;
        }

        html, body {
            background: var(--bg-primary);
        }

        body::before {
            content: "";
            position: fixed;
            top: -200px;
            right: -100px;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.08), transparent 70%);
            z-index: 0;
            pointer-events: none;
        }

        body::after {
            content: "";
            position: fixed;
            bottom: -150px;
            left: -100px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.06), transparent 70%);
            z-index: 0;
            pointer-events: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            font-family: inherit;
        }

        input,
        select,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 2;
            width: 100%;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        .glass-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .glass-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.12), transparent);
        }

        .glass-card:hover {
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
            border-color: var(--border-glow);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 30px;
            background: linear-gradient(135deg, #06B6D4, #8B5CF6);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border-radius: 10px;
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-glow-strong);
            transition: all 0.25s ease;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .btn-primary::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), transparent);
            opacity: 0;
            transition: opacity 0.3s;
            z-index: -1;
        }

        .btn-primary:hover {
            box-shadow: 0 0 40px rgba(6, 182, 212, 0.4);
            transform: scale(1.03);
            color: #fff;
        }

        .btn-primary:hover::after {
            opacity: 1;
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 30px;
            background: transparent;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            border-radius: 10px;
            border: 1px solid rgba(6, 182, 212, 0.5);
            cursor: pointer;
            transition: all 0.25s ease;
        }

        .btn-secondary:hover {
            background: rgba(6, 182, 212, 0.1);
            border-color: var(--primary);
            color: var(--primary-hover);
        }

        .btn-secondary:active {
            transform: scale(0.98);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            background: none;
            border: none;
            cursor: pointer;
            transition: all 0.25s;
            padding: 4px 0;
        }

        .btn-ghost:hover {
            color: var(--primary-hover);
            gap: 10px;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible,
        summary:focus-visible {
            outline: 3px solid rgba(6, 182, 212, 0.4);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 12px;
            font-weight: 500;
            background: var(--primary-dim);
            color: var(--primary);
            line-height: 1.6;
        }

        .badge-status {
            background: rgba(16, 185, 129, 0.15);
            color: var(--success);
        }

        .badge-warm {
            background: rgba(245, 158, 11, 0.15);
            color: var(--accent);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.3;
            position: relative;
            padding-left: 20px;
        }

        .section-title::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: linear-gradient(to bottom, var(--primary), var(--secondary));
            border-radius: 2px;
        }

        .section-desc {
            color: var(--text-secondary);
            font-size: 16px;
            margin-top: 16px;
            max-width: 640px;
            line-height: 1.8;
        }

        .section-gap {
            padding: 96px 0;
        }

        @media (max-width: 768px) {
            .section-gap {
                padding: 64px 0;
            }

            .section-title {
                font-size: 26px;
            }
        }

        @media (max-width: 520px) {
            .section-gap {
                padding: 48px 0;
            }

            .section-title {
                font-size: 24px;
            }
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(6, 10, 20, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-glass);
            transition: all 0.3s;
        }

        .site-header.scrolled {
            background: rgba(6, 10, 20, 0.95);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .top-bar {
            background: linear-gradient(90deg, rgba(6, 182, 212, 0.2), rgba(139, 92, 246, 0.2));
            padding: 6px 0;
            font-size: 13px;
            color: var(--text-secondary);
            text-align: center;
            border-bottom: 1px solid var(--border-glass);
        }

        .top-bar i {
            color: var(--primary);
            margin-right: 4px;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }

        .site-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .site-logo .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 14px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
        }

        .nav-links>li {
            position: relative;
        }

        .nav-links a.nav-item {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: all 0.25s;
            position: relative;
            white-space: nowrap;
        }

        .nav-links a.nav-item:hover {
            color: var(--primary);
            background: rgba(6, 182, 212, 0.06);
        }

        .nav-links a.nav-item.active {
            color: var(--primary);
            background: var(--primary-dim);
        }

        .nav-links a.nav-item.active::after {
            content: "";
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
        }

        .mega-menu {
            position: absolute;
            top: calc(100% + 10px);
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: rgba(11, 17, 32, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 24px;
            min-width: 520px;
            opacity: 0;
            visibility: hidden;
            transition: all 0.2s ease;
            z-index: 1001;
        }

        .nav-links>li:hover .mega-menu {
            opacity: 1;
            visibility: visible;
            transform: translateX(-50%) translateY(0);
        }

        .mega-inner {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 24px;
        }

        .mega-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            margin-bottom: 12px;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }

        .mega-col a.mega-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 7px 0;
            color: var(--text-secondary);
            font-size: 14px;
            transition: all 0.2s;
        }

        .mega-col a.mega-link:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .mega-col a.mega-link i {
            color: var(--primary);
            width: 16px;
            font-size: 12px;
        }

        .mega-cta-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: 16px;
            padding: 16px;
            text-align: center;
        }

        .mega-cta-card p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 12px;
            line-height: 1.6;
        }

        .mega-cta-card .btn-primary {
            padding: 10px 20px;
            font-size: 13px;
            width: 100%;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .hamburger span {
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s;
        }

        .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(6, 10, 20, 0.98);
            z-index: 999;
            padding: 90px 24px 40px;
            flex-direction: column;
            overflow-y: auto;
        }

        .mobile-menu.active {
            display: flex;
        }

        .mobile-menu a.mobile-link {
            padding: 16px 0;
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            border-bottom: 1px solid var(--border-glass);
            transition: all 0.2s;
        }

        .mobile-menu a.mobile-link:hover {
            color: var(--primary);
            padding-left: 8px;
        }

        .mobile-cta {
            margin-top: 24px;
        }

        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }

            .header-cta .btn-primary {
                display: none;
            }

            .hamburger {
                display: flex;
            }
        }

        @media (max-width: 640px) {
            .top-bar {
                font-size: 12px;
                padding: 4px 8px;
                white-space: nowrap;
                overflow: hidden;
                text-overflow: ellipsis;
            }

            .site-logo {
                font-size: 18px;
            }

            .site-logo .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 12px;
            }
        }

        .hero {
            position: relative;
            padding: 96px 0 80px;
            overflow: hidden;
            background: linear-gradient(180deg, rgba(6, 10, 20, 0.7), rgba(6, 10, 20, 0.9)), url('/assets/images/backpic/back-1.webp') center center/cover no-repeat;
        }

        .hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 70% 30%, rgba(6, 182, 212, 0.15), transparent 50%), radial-gradient(circle at 20% 80%, rgba(139, 92, 246, 0.1), transparent 50%);
            z-index: 1;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 60px;
            align-items: center;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(6, 182, 212, 0.1);
            border: 1px solid rgba(6, 182, 212, 0.3);
            border-radius: 40px;
            font-size: 13px;
            color: var(--primary);
            margin-bottom: 24px;
        }

        .hero-badge .dot {
            width: 6px;
            height: 6px;
            background: var(--success);
            border-radius: 50%;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6);
            }
            50% {
                box-shadow: 0 0 0 5px rgba(16, 185, 129, 0);
            }
        }

        .hero h1 {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 20px;
        }

        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-sub {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 520px;
            margin-bottom: 36px;
        }

        .hero-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-visual {
            position: relative;
            z-index: 2;
            min-height: 380px;
        }

        .hero-panel-main {
            background: rgba(15, 23, 42, 0.7);
            padding: 32px;
            border-radius: 24px;
            margin-top: 20px;
        }

        .hero-panel-main .panel-label {
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.05em;
        }

        .hero-panel-main .big-number {
            font-size: 64px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            line-height: 1.2;
            margin: 8px 0 4px;
        }

        .hero-panel-main .trend {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--success);
            margin-top: 8px;
        }

        .hero-panel-float {
            position: absolute;
            padding: 16px 20px;
            border-radius: 16px;
            background: rgba(15, 23, 42, 0.85);
            display: flex;
            align-items: center;
            gap: 14px;
            box-shadow: var(--shadow-card);
            animation: float 3s ease-in-out infinite;
        }

        .hero-panel-float.float-1 {
            top: 10px;
            left: -20px;
            animation-delay: 0.5s;
        }

        .hero-panel-float.float-2 {
            bottom: 40px;
            right: -10px;
            animation-delay: 1.2s;
        }

        .hero-panel-float .float-icon {
            width: 40px;
            height: 40px;
            background: var(--primary-dim);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 16px;
        }

        .hero-panel-float .float-number {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.2;
        }

        .hero-panel-float .float-label {
            font-size: 13px;
            color: var(--text-muted);
        }

        @keyframes float {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-8px);
            }
        }

        .hero-trust {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 80px;
            padding: 24px 32px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            border-radius: 20px;
            backdrop-filter: blur(8px);
            position: relative;
            z-index: 2;
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 12px;
            justify-content: center;
        }

        .trust-item i {
            color: var(--success);
            font-size: 20px;
        }

        .trust-item span {
            font-size: 14px;
            color: var(--text-secondary);
        }

        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero {
                padding: 64px 0 56px;
            }

            .hero h1 {
                font-size: 36px;
            }

            .hero-visual {
                min-height: 320px;
            }

            .hero-trust {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
        }

        @media (max-width: 640px) {
            .hero {
                padding: 48px 0 40px;
            }

            .hero h1 {
                font-size: 28px;
            }

            .hero-sub {
                font-size: 15px;
            }

            .hero-btns {
                flex-direction: column;
                gap: 12px;
            }

            .hero-btns .btn-primary,
            .hero-btns .btn-secondary {
                width: 100%;
            }

            .hero-panel-float.float-1 {
                left: 0;
            }

            .hero-panel-float.float-2 {
                right: 0;
            }

            .hero-trust {
                grid-template-columns: 1fr;
            }
        }

        .pain-section {
            background: var(--bg-primary);
            position: relative;
        }

        .pain-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 1px;
            height: 60px;
            background: linear-gradient(to bottom, transparent, var(--border-glow));
        }

        .pain-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .pain-card {
            padding: 28px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            position: relative;
            transition: all 0.3s ease;
        }

        .pain-card:hover {
            border-color: rgba(239, 68, 68, 0.2);
            background: rgba(255, 255, 255, 0.04);
            transform: translateY(-3px);
        }

        .pain-card .pain-num {
            font-size: 14px;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.15);
            position: absolute;
            top: 20px;
            right: 24px;
        }

        .pain-card .pain-icon {
            width: 48px;
            height: 48px;
            background: rgba(239, 68, 68, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #F87171;
            font-size: 18px;
            margin-bottom: 16px;
        }

        .pain-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .pain-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .pain-card .pain-link {
            font-size: 13px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all 0.2s;
        }

        .pain-card .pain-link:hover {
            color: var(--primary);
            gap: 8px;
        }

        @media (max-width: 1024px) {
            .pain-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .pain-grid {
                grid-template-columns: 1fr;
            }
        }

        .solution-section {
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
        }

        .solution-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
        }

        .solution-section::after {
            content: "";
            position: absolute;
            bottom: -100px;
            right: -50px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.05), transparent 70%);
            z-index: 0;
        }

        .solution-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-top: 48px;
            position: relative;
            z-index: 1;
        }

        .solution-card {
            padding: 32px 28px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(6, 182, 212, 0.15);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(10px);
            transition: all 0.3s;
            display: flex;
            flex-direction: column;
            position: relative;
            overflow: hidden;
        }

        .solution-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
            transition: left 0.5s ease;
        }

        .solution-card:hover::before {
            left: 100%;
        }

        .solution-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }

        .solution-card .sol-icon {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(139, 92, 246, 0.2));
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .solution-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .solution-card p.desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .solution-features {
            list-style: none;
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .solution-features li {
            font-size: 14px;
            color: var(--text-secondary);
            padding: 6px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .solution-features li i {
            color: var(--primary);
            font-size: 12px;
        }

        .solution-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 20px;
        }

        .solution-tags .badge {
            font-size: 11px;
            padding: 3px 10px;
        }

        .solution-link {
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            transition: gap 0.2s;
        }

        .solution-link:hover {
            gap: 10px;
        }

        @media (max-width: 1024px) {
            .solution-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .solution-grid {
                grid-template-columns: 1fr;
            }
        }

        .stats-section {
            background: var(--bg-primary);
            position: relative;
        }

        .stats-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: 48px;
        }

        .stat-card {
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.06), rgba(139, 92, 246, 0.06));
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
        }

        .stat-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }

        .stat-card .stat-number {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.1;
            background: linear-gradient(135deg, var(--accent), #FBBF24);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .stat-divider {
            width: 40px;
            height: 1px;
            background: var(--primary);
            margin: 14px auto;
            opacity: 0.5;
        }

        .stat-card .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
        }

        @media (max-width: 1024px) {
            .stats-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .stats-container {
                grid-template-columns: 1fr;
            }

            .stat-card .stat-number {
                font-size: 40px;
            }
        }

        .news-section {
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
        }

        .section-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }

        .view-all {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            transition: gap 0.2s;
            white-space: nowrap;
        }

        .view-all:hover {
            gap: 12px;
            color: var(--primary-hover);
        }

        .news-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 32px;
        }

        .news-featured {
            position: relative;
        }

        .featured-card {
            display: block;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-glass);
            transition: all 0.3s;
        }

        .featured-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }

        .featured-card .featured-image {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            position: relative;
        }

        .featured-card .featured-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s;
        }

        .featured-card:hover .featured-image img {
            transform: scale(1.04);
        }

        .featured-card .featured-content {
            padding: 24px;
        }

        .featured-card .featured-content h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.5;
            margin: 12px 0 8px;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .featured-card .featured-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .featured-card .featured-content time {
            font-size: 13px;
            color: var(--text-muted);
            display: inline-block;
            margin-top: 12px;
        }

        .news-list-side {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-list-item {
            display: flex;
            gap: 16px;
            padding: 16px;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.04);
            border-radius: 16px;
            transition: all 0.3s;
            align-items: center;
        }

        .news-list-item:hover {
            background: rgba(255, 255, 255, 0.04);
            border-left: 3px solid var(--primary);
            transform: translateX(2px);
        }

        .news-list-item .news-thumb {
            width: 80px;
            height: 80px;
            border-radius: 12px;
            overflow: hidden;
            flex-shrink: 0;
        }

        .news-list-item .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-list-item .news-info h4 {
            font-size: 14px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 4px;
        }

        .news-list-item .news-info p {
            font-size: 13px;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.6;
            margin-bottom: 6px;
        }

        .news-list-item .news-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .news-list-item .news-meta span {
            color: var(--primary);
            font-size: 12px;
        }

        .cms-empty-state {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 32px;
            background: rgba(255, 255, 255, 0.02);
            border: 1px dashed var(--border-glass);
            border-radius: var(--radius-lg);
        }

        .cms-empty-state .empty-icon {
            font-size: 40px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        .cms-empty-state p {
            color: var(--text-secondary);
            font-size: 15px;
        }

        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 640px) {
            .news-list-item {
                flex-direction: row;
                padding: 12px;
            }

            .news-list-item .news-thumb {
                width: 60px;
                height: 60px;
            }

            .featured-card .featured-content h3 {
                font-size: 17px;
            }
        }

        .faq-section {
            background: var(--bg-primary);
            position: relative;
        }

        .faq-layout {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 48px;
            margin-top: 48px;
        }

        .faq-sidebar {
            align-self: start;
            position: sticky;
            top: 100px;
            padding: 32px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            text-align: center;
        }

        .faq-sidebar h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .faq-sidebar p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .faq-accordion {
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: rgba(255, 255, 255, 0.02);
        }

        .faq-item {
            border-bottom: 1px solid var(--border-glass);
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-item summary {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            list-style: none;
            transition: all 0.3s;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            background: rgba(255, 255, 255, 0.02);
            color: var(--primary);
        }

        .faq-item summary .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--primary);
            flex-shrink: 0;
            transition: all 0.3s;
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-item .faq-answer {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            border-left: 3px solid var(--primary);
            margin: 0 24px 20px;
            padding: 12px 16px;
            background: rgba(6, 182, 212, 0.03);
            border-radius: 0 12px 12px 0;
        }

        @media (max-width: 1024px) {
            .faq-layout {
                grid-template-columns: 1fr;
            }

            .faq-sidebar {
                position: static;
            }
        }

        @media (max-width: 640px) {
            .faq-item summary {
                padding: 14px 16px;
                font-size: 14px;
            }

            .faq-item .faq-answer {
                margin: 0 16px 16px;
            }
        }

        .cta-section {
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.12), rgba(139, 92, 246, 0.08));
            z-index: 0;
        }

        .cta-inner {
            text-align: center;
            position: relative;
            z-index: 1;
            max-width: 720px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cta-inner p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        @media (max-width: 640px) {
            .cta-inner h2 {
                font-size: 24px;
            }

            .cta-btns {
                flex-direction: column;
                align-items: center;
            }
        }

        .site-footer {
            background: #041228;
            padding: 64px 0 0;
            border-top: 1px solid rgba(6, 182, 212, 0.15);
            position: relative;
            z-index: 2;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }

        .footer-brand .footer-logo .brand-icon {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 13px;
            font-weight: 800;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .footer-brand .footer-security {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .footer-brand .sec-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--text-muted);
            padding: 4px 10px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 20px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-col p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .footer-col .contact-item {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            margin-bottom: 12px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .footer-col .contact-item i {
            color: var(--primary);
            margin-top: 3px;
            width: 14px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(2, 6, 17, 0.7);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
            z-index: 2000;
            display: none;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .modal-overlay.active {
            display: flex;
        }

        .modal-card {
            background: rgba(15, 23, 42, 0.95);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 40px;
            max-width: 480px;
            width: 100%;
            box-shadow: var(--shadow-glow-strong);
            position: relative;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }

        .modal-card .modal-close {
            position: absolute;
            top: 16px;
            right: 16px;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.05);
            border: none;
            color: var(--text-secondary);
            cursor: pointer;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s;
        }

        .modal-card .modal-close:hover {
            background: rgba(255, 255, 255, 0.1);
            color: var(--text-primary);
        }

        .modal-card h2 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .modal-card .modal-sub {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .modal-card .form-group {
            margin-bottom: 16px;
        }

        .modal-card label {
            display: block;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }

        .modal-card input,
        .modal-card select {
            width: 100%;
            padding: 12px 14px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            border-radius: 10px;
            color: var(--text-primary);
            font-size: 14px;
            transition: all 0.2s;
        }

        .modal-card input:focus,
        .modal-card select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
            outline: none;
        }

        .modal-card input::placeholder {
            color: var(--text-muted);
        }

        .modal-card select {
            appearance: none;
            background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
            cursor: pointer;
        }

        .modal-card .modal-submit {
            width: 100%;
            margin-top: 8px;
        }

        .modal-privacy {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 16px;
        }

        .modal-privacy i {
            color: var(--success);
        }

        @media (max-width: 640px) {
            .modal-card {
                padding: 24px;
            }
        }

        .privacy-note-bar {
            background: rgba(6, 10, 20, 0.8);
            padding: 16px 0;
            text-align: center;
            border-top: 1px solid var(--border-glass);
            font-size: 13px;
            color: var(--text-muted);
        }

        .privacy-note-bar i {
            color: var(--success);
            margin-right: 6px;
        }

        .backtop {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(6, 182, 212, 0.2);
            border: 1px solid rgba(6, 182, 212, 0.3);
            color: var(--primary);
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 500;
        }

        .backtop.show {
            opacity: 1;
            visibility: visible;
        }

        .backtop:hover {
            background: rgba(6, 182, 212, 0.35);
            box-shadow: var(--shadow-glow);
        }

        @media (max-width: 640px) {
            .backtop {
                bottom: 20px;
                right: 20px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #060A14;
            --bg-secondary: #0B1120;
            --bg-elevated: rgba(15, 23, 42, 0.6);
            --bg-glass: rgba(255, 255, 255, 0.04);
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(56, 189, 248, 0.25);
            --primary: #06B6D4;
            --primary-hover: #22D3EE;
            --primary-dim: rgba(6, 182, 212, 0.15);
            --secondary: #8B5CF6;
            --accent: #F59E0B;
            --text-primary: #E2E8F0;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --success: #10B981;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 24px rgba(6, 182, 212, 0.15);
            --shadow-glow-strong: 0 0 32px rgba(6, 182, 212, 0.3);
            --font-sans: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            background-image:
                radial-gradient(ellipse 80% 50% at 80% -10%, rgba(6, 182, 212, 0.08), transparent),
                radial-gradient(ellipse 60% 40% at 10% 110%, rgba(139, 92, 246, 0.06), transparent);
            background-repeat: no-repeat;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary-hover);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 14px;
        }
        :focus-visible {
            outline: 3px solid rgba(6, 182, 212, 0.4);
            border-radius: 4px;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 96px 0;
        }
        .section-alt {
            background: var(--bg-secondary);
        }
        .glass-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            position: relative;
            transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 20px;
            right: 20px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.12), transparent);
        }
        .glass-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card), var(--shadow-glow);
            border-color: var(--border-glow);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #06B6D4, #8B5CF6);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 10px;
            border: none;
            box-shadow: var(--shadow-glow-strong);
            transition: all .25s ease;
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #22D3EE, #A78BFA);
            box-shadow: 0 0 40px rgba(6, 182, 212, 0.45);
            transform: scale(1.02);
            color: #fff;
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            font-size: 15px;
            font-weight: 500;
            padding: 12px 28px;
            border-radius: 10px;
            transition: all .25s ease;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            background: rgba(6, 182, 212, 0.1);
            color: var(--primary-hover);
            border-color: var(--primary-hover);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 12px;
            font-weight: 500;
            background: var(--primary-dim);
            color: var(--primary);
        }
        .badge-accent {
            background: rgba(245, 158, 11, 0.12);
            color: var(--accent);
        }
        .badge-green {
            background: rgba(16, 185, 129, 0.12);
            color: var(--success);
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(6, 10, 20, 0.8);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background .3s ease, box-shadow .3s ease;
        }
        .site-header.scrolled {
            background: rgba(4, 8, 16, 0.92);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(6, 182, 212, 0.08);
        }
        .top-bar {
            background: linear-gradient(90deg, rgba(6, 182, 212, 0.15), rgba(139, 92, 246, 0.1));
            text-align: center;
            font-size: 13px;
            color: var(--text-secondary);
            padding: 6px 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .top-bar i {
            color: var(--primary);
            margin-right: 6px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            padding: 0 24px;
            max-width: 1280px;
            margin: 0 auto;
            gap: 24px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .nav-logo .brand-icon {
            width: 38px;
            height: 38px;
            min-width: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            box-shadow: var(--shadow-glow);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-item {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 2px;
            position: relative;
            transition: color .2s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .nav-item:hover {
            color: var(--primary);
        }
        .nav-item.active {
            color: var(--primary);
        }
        .nav-item.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
        }
        .has-mega {
            position: relative;
        }
        .mega-menu {
            position: absolute;
            top: calc(100% + 0px);
            left: 50%;
            transform: translateX(-50%) translateY(10px);
            width: 720px;
            background: rgba(15, 23, 42, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            opacity: 0;
            visibility: hidden;
            transition: all .2s ease;
            z-index: 80;
            padding: 24px;
        }
        .has-mega:hover .mega-menu,
        .has-mega:focus-within .mega-menu {
            opacity: 1;
            visibility: visible;
            transform: translateX(-50%) translateY(0);
        }
        .mega-inner {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 24px;
        }
        .mega-col h4 {
            font-size: 13px;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 14px;
            font-weight: 600;
            border-bottom: 1px solid var(--border-glass);
            padding-bottom: 8px;
        }
        .mega-col .mega-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 8px 10px;
            border-radius: 8px;
            transition: all .2s ease;
            margin-bottom: 2px;
        }
        .mega-col .mega-link i {
            color: var(--primary);
            width: 18px;
            text-align: center;
            font-size: 13px;
        }
        .mega-col .mega-link:hover {
            background: rgba(6, 182, 212, 0.06);
            color: var(--primary);
        }
        .mega-cta-card {
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.08), rgba(139, 92, 246, 0.06));
            border: 1px solid rgba(6, 182, 212, 0.15);
            border-radius: 12px;
            padding: 20px;
            text-align: center;
        }
        .mega-cta-card p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 14px;
            line-height: 1.6;
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: auto;
        }
        .nav-cta .btn-primary {
            padding: 9px 20px;
            font-size: 14px;
        }
        .hamburger {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            border: 1px solid var(--border-glass);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: all .2s ease;
        }
        .hamburger:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -100%;
            width: 100%;
            height: 100vh;
            background: rgba(4, 8, 16, 0.97);
            backdrop-filter: blur(24px);
            z-index: 200;
            transition: right .3s ease;
            padding: 24px;
            overflow-y: auto;
        }
        .mobile-drawer.open {
            right: 0;
        }
        .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }
        .drawer-close {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            border: 1px solid var(--border-glass);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .drawer-links {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .drawer-links li a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 8px;
            border-radius: 10px;
            color: var(--text-primary);
            font-size: 18px;
            font-weight: 500;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            transition: all .2s ease;
        }
        .drawer-links li a:hover {
            background: rgba(6, 182, 212, 0.08);
            color: var(--primary);
        }

        /* Hero */
        .cat-hero {
            position: relative;
            padding: 80px 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-color: var(--bg-primary);
        }
        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(6, 10, 20, 0.88) 40%, rgba(6, 10, 20, 0.62) 70%, rgba(6, 10, 20, 0.3));
        }
        .cat-hero .container {
            position: relative;
            z-index: 2;
        }
        .cat-hero h1 {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #E2E8F0 30%, var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .cat-hero .lead {
            color: var(--text-secondary);
            font-size: 17px;
            max-width: 600px;
            line-height: 1.8;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            padding: 20px 0;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb i {
            font-size: 10px;
            color: var(--text-muted);
        }

        /* Section title */
        .section-title {
            font-size: 32px;
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
            position: relative;
            padding-left: 18px;
        }
        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--primary), var(--secondary));
        }
        .section-sub {
            color: var(--text-secondary);
            font-size: 16px;
            margin-bottom: 40px;
            max-width: 680px;
        }

        /* Feature split */
        .split-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .split-img {
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-card);
            position: relative;
        }
        .split-img img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .split-img:hover img {
            transform: scale(1.02);
        }
        .split-text h3 {
            font-size: 26px;
            font-weight: 600;
            margin-bottom: 20px;
            line-height: 1.4;
        }
        .split-text p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.9;
            margin-bottom: 16px;
        }

        /* Points list */
        .points-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .point-item {
            display: flex;
            gap: 16px;
            padding: 24px;
            border-radius: var(--radius-lg);
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-left: 3px solid var(--primary);
            transition: all .3s ease;
        }
        .point-item:hover {
            border-left-color: var(--secondary);
            background: rgba(255, 255, 255, 0.06);
            transform: translateX(4px);
        }
        .point-icon {
            width: 44px;
            height: 44px;
            min-width: 44px;
            border-radius: 10px;
            background: var(--primary-dim);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }
        .point-item h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .point-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Steps */
        .steps-wrap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .step-card {
            text-align: center;
            padding: 36px 28px;
        }
        .step-num {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-glow);
        }
        .step-card h4 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .step-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }

        /* CTA banner */
        .cta-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(139, 92, 246, 0.08)), var(--bg-secondary);
            border: 1px solid rgba(6, 182, 212, 0.2);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            text-align: center;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 160px;
            height: 160px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.12), transparent);
            border-radius: 50%;
        }
        .cta-banner h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-banner p {
            color: var(--text-secondary);
            font-size: 16px;
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        /* FAQ */
        .faq-wrap {
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 32px;
            align-items: start;
        }
        .faq-list {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-glass);
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            transition: background .2s ease;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-item summary .faq-icon {
            width: 28px;
            height: 28px;
            min-width: 28px;
            border-radius: 50%;
            background: var(--primary-dim);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: transform .3s ease;
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 24px 20px 24px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
            border-left: 3px solid var(--primary);
            margin-left: 24px;
            padding-left: 20px;
        }
        .faq-side {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 32px;
            text-align: center;
        }
        .faq-side h4 {
            font-size: 20px;
            margin-bottom: 12px;
        }
        .faq-side p {
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 20px;
        }

        /* Footer */
        .site-footer {
            background: #041228;
            border-top: 1px solid rgba(6, 182, 212, 0.15);
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding: 56px 0 40px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .footer-security {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .sec-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            padding: 4px 12px;
            border-radius: 40px;
        }
        .sec-badge i {
            color: var(--success);
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 18px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all .2s ease;
        }
        .footer-col ul li a i {
            font-size: 10px;
            color: var(--primary);
        }
        .footer-col ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 12px;
        }
        .contact-item i {
            color: var(--primary);
            width: 16px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Modal */
        .modal-overlay {
            position: fixed;
            inset: 0;
            background: rgba(2, 6, 17, 0.7);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
            z-index: 300;
            display: none;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        .modal-overlay.active {
            display: flex;
        }
        .modal-card {
            background: rgba(15, 23, 42, 0.92);
            border: 1px solid rgba(6, 182, 212, 0.3);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card), var(--shadow-glow-strong);
            padding: 40px;
            max-width: 480px;
            width: 100%;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }
        .modal-card h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .modal-card .modal-sub {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 6px;
            font-weight: 500;
        }
        .form-group input,
        .form-group select {
            width: 100%;
            padding: 12px 14px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            color: var(--text-primary);
            transition: all .2s ease;
        }
        .form-group input:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
        }
        .modal-card .btn-primary {
            width: 100%;
            padding: 14px;
            font-size: 16px;
            margin-top: 8px;
        }
        .modal-privacy {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 16px;
        }
        .modal-privacy i {
            color: var(--success);
        }
        .modal-close {
            position: absolute;
            top: 16px;
            right: 16px;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border-glass);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-secondary);
            font-size: 14px;
            transition: all .2s ease;
        }
        .modal-close:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .section {
                padding: 64px 0;
            }
            .nav-links {
                gap: 16px;
            }
            .mega-menu {
                width: 600px;
                left: 0;
                transform: translateX(-20%) translateY(10px);
            }
            .has-mega:hover .mega-menu {
                transform: translateX(-20%) translateY(0);
            }
            .mega-inner {
                grid-template-columns: 1fr 1fr;
            }
            .faq-wrap {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .main-nav {
                height: 64px;
                padding: 0 16px;
            }
            .nav-links,
            .nav-cta .btn-primary {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .cat-hero {
                padding: 56px 0;
            }
            .cat-hero h1 {
                font-size: 30px;
            }
            .split-wrap {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .split-img img {
                height: 220px;
            }
            .points-grid {
                grid-template-columns: 1fr;
            }
            .steps-wrap {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding: 40px 0 24px;
            }
            .cta-banner {
                padding: 36px 24px;
            }
            .cta-banner h2 {
                font-size: 24px;
            }
            .modal-card {
                padding: 28px 20px;
            }
        }
        @media (max-width: 520px) {
            .cat-hero h1 {
                font-size: 26px;
            }
            .cat-hero .lead {
                font-size: 15px;
            }
            .section-title {
                font-size: 23px;
            }
            .point-item {
                padding: 18px;
            }
            .step-card {
                padding: 24px 18px;
            }
            .footer-security {
                flex-direction: column;
            }
            .faq-answer {
                margin-left: 16px;
                padding-left: 14px;
            }
        }

/* roulang page: article */
:root {
  --bg-primary: #060A14;
  --bg-secondary: #0B1120;
  --bg-elevated: rgba(15, 23, 42, 0.6);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(56, 189, 248, 0.25);
  --primary: #06B6D4;
  --primary-hover: #22D3EE;
  --primary-dim: rgba(6, 182, 212, 0.15);
  --secondary: #8B5CF6;
  --accent: #F59E0B;
  --text-primary: #E2E8F0;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --success: #10B981;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 24px rgba(6, 182, 212, 0.15);
  --shadow-glow-strong: 0 0 32px rgba(6, 182, 212, 0.3);
  --font-sans: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: -200px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.12), transparent 60%);
  z-index: 0;
  pointer-events: none;
}

body::after {
  content: '';
  position: fixed;
  bottom: -200px;
  left: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.08), transparent 60%);
  z-index: 0;
  pointer-events: none;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

button {
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
}

input, select, textarea {
  font-family: var(--font-sans);
}

:focus-visible {
  outline: 3px solid rgba(6, 182, 212, 0.4);
  outline-offset: 2px;
  border-radius: 4px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, #06B6D4, #8B5CF6);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  padding: 12px 28px;
  border-radius: 10px;
  border: none;
  box-shadow: var(--shadow-glow-strong);
  transition: all 0.3s ease;
  white-space: nowrap;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #22D3EE, #A78BFA);
  transform: scale(1.02);
  box-shadow: 0 0 36px rgba(6, 182, 212, 0.4);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  padding: 12px 28px;
  border-radius: 10px;
  border: 1px solid var(--primary);
  transition: all 0.3s ease;
  white-space: nowrap;
}

.btn-secondary:hover {
  background: rgba(6, 182, 212, 0.1);
  border-color: var(--primary-hover);
}

.btn-secondary:active {
  transform: scale(0.98);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 10, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glass);
  transition: background 0.4s ease, box-shadow 0.4s ease;
}

.site-header.scrolled {
  background: rgba(4, 8, 16, 0.95);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(6, 182, 212, 0.08);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #06B6D4, #8B5CF6);
  border-radius: 10px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 0 16px rgba(6, 182, 212, 0.3);
}

.main-nav {
  display: flex;
  align-items: center;
  flex: 1;
  justify-content: flex-start;
  margin-left: 24px;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 4px;
}

.nav-links li {
  position: relative;
}

.nav-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: color 0.25s ease, background 0.25s ease;
  position: relative;
}

.nav-item i {
  font-size: 11px;
  transition: transform 0.25s ease;
}

.nav-item:hover {
  color: var(--primary);
  background: var(--primary-dim);
}

.nav-item.active {
  color: var(--primary);
  font-weight: 600;
}

.nav-item.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
}

.has-mega:hover .nav-item i {
  transform: rotate(180deg);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

/* Mega Menu */
.mega-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: 680px;
  background: rgba(11, 17, 32, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
  z-index: 200;
}

.has-mega:hover .mega-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.mega-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.9fr;
  gap: 24px;
}

.mega-col h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-glass);
}

.mega-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.mega-link i {
  width: 20px;
  text-align: center;
  color: var(--primary);
  font-size: 14px;
}

.mega-link:hover {
  background: var(--primary-dim);
  color: var(--primary);
  padding-left: 14px;
}

.mega-cta-card {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(139, 92, 246, 0.08));
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-top: 6px;
}

.mega-cta-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

.mega-cta-card .btn-primary {
  width: 100%;
  font-size: 13px;
  padding: 10px 16px;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 42px;
  height: 42px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 300;
}

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  margin: 3px 0;
  transition: all 0.3s ease;
}

.hamburger.open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  height: 100%;
  background: rgba(6, 10, 20, 0.98);
  z-index: 250;
  transition: right 0.4s ease;
  overflow-y: auto;
  padding: 96px 32px 32px;
}

.mobile-drawer.open {
  right: 0;
}

.mobile-drawer .drawer-links {
  list-style: none;
}

.mobile-drawer .drawer-links li {
  margin-bottom: 8px;
}

.mobile-drawer .drawer-links a {
  display: block;
  padding: 14px 16px;
  font-size: 18px;
  font-weight: 500;
  color: var(--text-primary);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  transition: all 0.2s ease;
}

.mobile-drawer .drawer-links a:hover {
  background: var(--primary-dim);
  color: var(--primary);
}

.mobile-drawer .drawer-links .drawer-sub {
  padding-left: 24px;
  margin-top: 4px;
}

.mobile-drawer .drawer-links .drawer-sub a {
  font-size: 16px;
  padding: 10px 14px;
  background: transparent;
}

.mobile-drawer .drawer-cta {
  margin-top: 24px;
}

.mobile-drawer .drawer-cta .btn-primary {
  width: 100%;
}

/* Article Hero */
.article-hero {
  position: relative;
  padding: 64px 0 56px;
  background: linear-gradient(135deg, rgba(6, 10, 20, 0.88), rgba(11, 17, 32, 0.92)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom: 1px solid var(--border-glass);
}

.article-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.15), transparent 60%);
  pointer-events: none;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.breadcrumb a {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb .sep {
  color: var(--text-muted);
  font-size: 12px;
}

.breadcrumb .current {
  color: var(--text-secondary);
  max-width: 400px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.article-hero h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: #F8FAFC;
  max-width: 860px;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 14px;
  color: var(--text-secondary);
}

.cat-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-dim);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 40px;
  border: 1px solid rgba(6, 182, 212, 0.2);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-item i {
  font-size: 13px;
  color: var(--text-muted);
}

/* Article Body */
.article-body {
  padding: 56px 0 64px;
  background: var(--bg-primary);
  position: relative;
}

.article-container {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.article-content {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-primary);
}

.article-content h2 {
  font-size: 26px;
  font-weight: 700;
  color: #F1F5F9;
  margin: 40px 0 18px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
  border-radius: 2px;
}

.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: #E2E8F0;
  margin: 32px 0 14px;
}

.article-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: #E2E8F0;
  margin: 24px 0 12px;
}

.article-content p {
  margin-bottom: 22px;
  color: #CBD5E1;
}

.article-content img {
  border-radius: 16px;
  margin: 28px 0;
  box-shadow: var(--shadow-card);
  width: 100%;
  height: auto;
  object-fit: cover;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(6, 182, 212, 0.06);
  padding: 18px 24px;
  border-radius: 0 12px 12px 0;
  margin: 28px 0;
  color: var(--text-secondary);
  font-style: italic;
}

.article-content blockquote p {
  margin-bottom: 0;
  color: var(--text-secondary);
}

.article-content ul,
.article-content ol {
  padding-left: 24px;
  margin: 20px 0 24px;
}

.article-content ul li,
.article-content ol li {
  margin-bottom: 10px;
  padding-left: 4px;
  color: #CBD5E1;
}

.article-content ul li::marker {
  color: var(--primary);
}

.article-content ol li::marker {
  color: var(--primary);
  font-weight: 600;
}

.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s ease;
}

.article-content a:hover {
  color: var(--primary-hover);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  border-radius: 12px;
  overflow: hidden;
}

.article-content table th,
.article-content table td {
  padding: 12px 16px;
  border: 1px solid var(--border-glass);
  font-size: 14px;
  text-align: left;
}

.article-content table th {
  background: rgba(6, 182, 212, 0.08);
  color: var(--text-primary);
  font-weight: 600;
}

.article-content code {
  background: rgba(139, 92, 246, 0.12);
  color: #C4B5FD;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 14px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Not Found */
.not-found {
  text-align: center;
  padding: 60px 24px;
}

.not-found .nf-icon {
  font-size: 56px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.not-found h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.not-found p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 15px;
}

/* Related Section */
.related-section {
  padding: 64px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.section-header h2 {
  font-size: 30px;
  font-weight: 700;
  color: #F8FAFC;
  position: relative;
  padding-left: 16px;
}

.section-header h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 28px;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 2px;
}

.view-all {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  transition: gap 0.2s ease;
}

.view-all:hover {
  gap: 12px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  position: relative;
}

.related-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(6, 182, 212, 0.4), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: var(--border-glow);
}

.related-card:hover::before {
  opacity: 1;
}

.related-card .card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: var(--bg-elevated);
}

.related-card .card-body {
  padding: 20px;
}

.related-card .cat-badge {
  margin-bottom: 10px;
}

.related-card h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 8px;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card .card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-muted);
}

/* Article CTA */
.article-cta {
  padding: 64px 0;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.06), rgba(139, 92, 246, 0.08));
  position: relative;
  overflow: hidden;
}

.article-cta::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(6, 182, 212, 0.15), transparent 70%);
  pointer-events: none;
}

.cta-inner {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.cta-inner h2 {
  font-size: 28px;
  font-weight: 700;
  color: #F8FAFC;
  margin-bottom: 14px;
}

.cta-inner p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.cta-btns {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Footer */
.site-footer {
  background: #041228;
  border-top: 1px solid rgba(6, 182, 212, 0.15);
  padding-top: 64px;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-security {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.sec-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  padding: 6px 12px;
  border-radius: 40px;
}

.sec-badge i {
  color: var(--success);
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #F1F5F9;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.footer-col ul li a i {
  font-size: 11px;
  color: var(--text-muted);
  transition: transform 0.2s ease;
}

.footer-col ul li a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-col ul li a:hover i {
  transform: translateX(3px);
  color: var(--primary);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.contact-item i {
  color: var(--primary);
  width: 20px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 20px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 17, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(11, 17, 32, 0.98));
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-glow-strong);
  max-width: 480px;
  width: 100%;
  padding: 36px 32px;
  position: relative;
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.modal-overlay.open .modal-card {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all 0.3s ease;
  cursor: pointer;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  transform: rotate(90deg);
}

.modal-card h2 {
  font-size: 24px;
  font-weight: 700;
  color: #F8FAFC;
  margin-bottom: 8px;
}

.modal-card .modal-sub {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.modal-form .form-group {
  margin-bottom: 16px;
}

.modal-form input,
.modal-form select {
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  padding: 13px 16px;
  font-size: 14px;
  color: var(--text-primary);
  transition: all 0.3s ease;
  appearance: none;
  -webkit-appearance: none;
}

.modal-form select {
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 14px;
  cursor: pointer;
}

.modal-form input:focus,
.modal-form select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
  outline: none;
}

.modal-form input::placeholder {
  color: var(--text-muted);
}

.modal-form select option {
  background: #0B1120;
  color: var(--text-primary);
}

.modal-form .btn-primary {
  width: 100%;
  margin-top: 8px;
  padding: 14px 20px;
  font-size: 15px;
}

.privacy-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.privacy-note i {
  color: var(--success);
}

/* Responsive */
@media (max-width: 1024px) {
  .mega-menu {
    width: 580px;
    left: auto;
    right: 0;
    transform: translateY(8px);
  }
  .has-mega:hover .mega-menu {
    transform: translateY(0);
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .main-nav {
    display: none;
  }
  .nav-actions .btn-primary {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .article-hero {
    padding: 40px 0 36px;
  }
  .article-hero h1 {
    font-size: 26px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .mega-inner {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .article-container {
    padding: 0 16px;
  }
  .cta-btns {
    flex-direction: column;
    align-items: center;
  }
  .cta-btns .btn-primary,
  .cta-btns .btn-secondary {
    width: 100%;
  }
  .article-content {
    font-size: 15px;
  }
  .article-content h2 {
    font-size: 22px;
  }
  .modal-card {
    padding: 28px 20px;
  }
}

@media (max-width: 520px) {
  .logo {
    font-size: 17px;
  }
  .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }
  .nav-container {
    height: 64px;
  }
  .article-meta {
    gap: 10px;
    font-size: 13px;
  }
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}

/* roulang page: category2 */
:root {
            --bg-primary: #060A14;
            --bg-secondary: #0B1120;
            --bg-elevated: rgba(15, 23, 42, 0.6);
            --bg-glass: rgba(255, 255, 255, 0.04);
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(56, 189, 248, 0.25);
            --primary: #06B6D4;
            --primary-hover: #22D3EE;
            --primary-dim: rgba(6, 182, 212, 0.15);
            --secondary: #8B5CF6;
            --accent: #F59E0B;
            --text-primary: #E2E8F0;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --success: #10B981;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 24px rgba(6, 182, 212, 0.15);
            --shadow-glow-strong: 0 0 32px rgba(6, 182, 212, 0.3);
            --font-sans: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", system-ui, -apple-system, sans-serif;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }

        html { scroll-behavior: smooth; }

        body {
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse 600px 400px at 85% -10%, rgba(139, 92, 246, 0.12), transparent 60%),
                radial-gradient(ellipse 800px 500px at -10% 30%, rgba(6, 182, 212, 0.08), transparent 55%);
            color: var(--text-primary);
            font-family: var(--font-sans);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        img { max-width: 100%; display: block; }
        a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
        button { cursor: pointer; font-family: inherit; }
        input, select, textarea { font-family: inherit; }

        .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

        h1, h2, h3, h4 { line-height: 1.3; letter-spacing: -0.01em; }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(6, 10, 20, 0.75);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-glass);
            transition: background 0.4s ease, box-shadow 0.4s ease;
        }
        .site-header.scrolled {
            background: rgba(6, 10, 20, 0.92);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4), 0 1px 0 rgba(6, 182, 212, 0.1);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .brand-logo:hover { color: var(--primary-hover); }
        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            color: #fff;
            box-shadow: 0 4px 16px rgba(6, 182, 212, 0.3);
        }
        .main-nav { display: flex; align-items: center; }
        .nav-links {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 4px;
        }
        .nav-links > li { position: relative; }
        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.3s ease;
        }
        .nav-item:hover {
            color: var(--primary-hover);
            background: rgba(6, 182, 212, 0.06);
        }
        .nav-item.active {
            color: var(--primary);
            background: var(--primary-dim);
            font-weight: 600;
        }
        .nav-item.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 18px;
            right: 18px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), transparent);
        }
        .nav-item i { font-size: 11px; opacity: 0.8; transition: transform 0.3s ease; }

        .has-mega:hover .mega-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .has-mega:hover .nav-item i { transform: rotate(180deg); }

        .mega-menu {
            position: absolute;
            top: calc(100% + 8px);
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            width: 680px;
            background: rgba(13, 20, 36, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            opacity: 0;
            visibility: hidden;
            transition: all 0.25s ease;
            z-index: 200;
        }
        .mega-inner {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr;
            gap: 8px;
            padding: 24px;
        }
        .mega-col h4 {
            font-size: 13px;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-muted);
            margin-bottom: 14px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--border-glass);
        }
        .mega-link {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 9px 12px;
            border-radius: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 4px;
            transition: all 0.2s ease;
        }
        .mega-link i { color: var(--primary); font-size: 14px; width: 16px; text-align: center; }
        .mega-link:hover {
            background: var(--primary-dim);
            color: var(--text-primary);
            transform: translateX(4px);
        }
        .mega-cta-card {
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(139, 92, 246, 0.08));
            border: 1px solid rgba(6, 182, 212, 0.2);
            border-radius: var(--radius-md);
            padding: 16px;
            text-align: center;
        }
        .mega-cta-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 10px;
            background: linear-gradient(135deg, #06B6D4, #8B5CF6);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border: none;
            box-shadow: 0 0 24px rgba(6, 182, 212, 0.25);
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        .btn-primary:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 0 36px rgba(6, 182, 212, 0.4);
            filter: brightness(1.1);
        }
        .btn-primary:active { transform: scale(0.98); }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(6, 182, 212, 0.4);
            outline-offset: 2px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 10px;
            background: transparent;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            border: 1px solid rgba(6, 182, 212, 0.4);
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            background: var(--primary-dim);
            border-color: var(--primary);
        }
        .btn-secondary:focus-visible {
            outline: 3px solid rgba(6, 182, 212, 0.4);
            outline-offset: 2px;
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
        }
        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        /* Mobile menu */
        .mobile-menu {
            position: fixed;
            top: 0;
            right: -320px;
            width: 320px;
            height: 100vh;
            background: rgba(6, 10, 20, 0.98);
            backdrop-filter: blur(20px);
            z-index: 200;
            padding: 90px 30px 40px;
            transition: right 0.4s ease;
            border-left: 1px solid var(--border-glass);
            overflow-y: auto;
        }
        .mobile-menu.open { right: 0; }
        .mobile-menu a {
            display: block;
            padding: 14px 0;
            font-size: 18px;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-glass);
        }
        .mobile-menu a.active { color: var(--primary); }
        .mobile-menu a:hover { color: var(--primary-hover); padding-left: 8px; }
        .mobile-menu-close {
            position: absolute;
            top: 20px;
            right: 20px;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-glass);
            color: var(--text-primary);
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .mobile-overlay {
            position: fixed;
            inset: 0;
            background: rgba(2, 6, 17, 0.7);
            backdrop-filter: blur(4px);
            z-index: 190;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        .mobile-overlay.open { opacity: 1; visibility: visible; }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            padding: 80px 0 60px;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(6, 10, 20, 0.94), rgba(6, 10, 20, 0.75), rgba(11, 17, 32, 0.5));
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(transparent, var(--bg-primary));
        }
        .category-hero .container { position: relative; z-index: 1; }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .breadcrumb a { color: var(--text-muted); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb .sep { color: var(--text-muted); opacity: 0.5; }
        .breadcrumb .current { color: var(--text-secondary); }

        .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 40px;
            background: var(--primary-dim);
            color: var(--primary);
            border: 1px solid rgba(6, 182, 212, 0.2);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .category-hero h1 {
            font-size: 44px;
            font-weight: 700;
            margin-bottom: 16px;
            line-height: 1.2;
            background: linear-gradient(135deg, #fff 30%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p.lead {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; }

        /* ===== Sections ===== */
        .section {
            padding: 88px 0;
        }
        .section-alt { background: var(--bg-secondary); position: relative; }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--text-primary);
        }
        .section-title::after {
            content: '';
            display: block;
            width: 56px;
            height: 3px;
            border-radius: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            margin-top: 14px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 40px;
        }

        /* Overview */
        .overview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .overview-image {
            border-radius: var(--radius-xl);
            overflow: hidden;
            position: relative;
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-card);
        }
        .overview-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .overview-image:hover img { transform: scale(1.03); }
        .overview-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(transparent 50%, rgba(6, 10, 20, 0.5));
        }
        .overview-content h3 {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .overview-content p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.9;
            margin-bottom: 24px;
        }
        .overview-points {
            list-style: none;
            display: grid;
            gap: 14px;
            margin-bottom: 28px;
        }
        .overview-points li {
            display: flex;
            gap: 12px;
            font-size: 15px;
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            border-radius: 12px;
            padding: 14px 18px;
            transition: all 0.3s ease;
        }
        .overview-points li:hover {
            border-color: rgba(6, 182, 212, 0.3);
            background: rgba(6, 182, 212, 0.04);
        }
        .overview-points li i {
            color: var(--primary);
            font-size: 16px;
            padding-top: 4px;
            flex-shrink: 0;
        }

        /* Timeline */
        .timeline {
            position: relative;
            max-width: 820px;
            margin: 0 auto;
            padding-left: 0;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 28px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--primary), var(--secondary), transparent);
            opacity: 0.4;
        }
        .timeline-item {
            position: relative;
            padding: 0 0 44px 88px;
        }
        .timeline-item:last-child { padding-bottom: 0; }
        .timeline-dot {
            position: absolute;
            left: 14px;
            top: 4px;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.3);
        }
        .timeline-dot i {
            color: #fff;
            font-size: 12px;
        }
        .timeline-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 26px 30px;
            transition: all 0.3s ease;
            backdrop-filter: blur(8px);
        }
        .timeline-card:hover {
            border-color: rgba(6, 182, 212, 0.3);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }
        .timeline-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .timeline-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .timeline-step {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-dim);
            border-radius: 40px;
            padding: 3px 12px;
            margin-bottom: 10px;
        }

        /* Core capabilities - asymmetric grid */
        .capabilities-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
        }
        .capability-card {
            grid-column: span 4;
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 30px;
            position: relative;
            overflow: hidden;
            transition: all 0.4s ease;
            backdrop-filter: blur(8px);
        }
        .capability-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(6, 182, 212, 0.5), transparent);
        }
        .capability-card:hover {
            transform: translateY(-4px);
            border-color: rgba(6, 182, 212, 0.25);
            box-shadow: var(--shadow-glow);
        }
        .capability-card:nth-child(1) { grid-column: span 7; }
        .capability-card:nth-child(2) { grid-column: span 5; }
        .capability-card:nth-child(3) { grid-column: span 5; }
        .capability-card:nth-child(4) { grid-column: span 7; }
        .capability-card:nth-child(5) { grid-column: span 4; }
        .capability-card:nth-child(6) { grid-column: span 8; }

        .cap-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(139, 92, 246, 0.15));
            border: 1px solid rgba(6, 182, 212, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .capability-card h3 { font-size: 19px; font-weight: 600; margin-bottom: 10px; }
        .capability-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.75; }
        .cap-tag {
            display: inline-block;
            margin-top: 14px;
            font-size: 12px;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-glass);
            border-radius: 40px;
            padding: 3px 12px;
        }

        /* Industries */
        .industry-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .industry-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all 0.4s ease;
        }
        .industry-card:hover {
            border-color: rgba(6, 182, 212, 0.35);
            transform: translateY(-3px);
            box-shadow: var(--shadow-glow);
        }
        .industry-icon {
            width: 54px;
            height: 54px;
            border-radius: 50%;
            margin: 0 auto 18px;
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(139, 92, 246, 0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
        }
        .industry-card h4 { font-size: 17px; font-weight: 600; margin-bottom: 10px; }
        .industry-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }
        .industry-card .industry-label {
            display: inline-block;
            margin-top: 12px;
            font-size: 12px;
            color: var(--accent);
            background: rgba(245, 158, 11, 0.1);
            border-radius: 40px;
            padding: 3px 12px;
            border: 1px solid rgba(245, 158, 11, 0.15);
        }

        /* Data metrics */
        .metrics-section {
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.06), rgba(139, 92, 246, 0.05));
            border-top: 1px solid var(--border-glass);
            border-bottom: 1px solid var(--border-glass);
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .metric-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .metric-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 3px;
            border-radius: 0 0 3px 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }
        .metric-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-glow); }
        .metric-number {
            font-size: 54px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            background: linear-gradient(135deg, #F59E0B, #FBBF24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .metric-divider {
            width: 32px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), transparent);
            margin: 16px auto 12px;
        }
        .metric-label { font-size: 15px; color: var(--text-primary); font-weight: 600; }
        .metric-desc { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

        /* CTA section */
        .cta-section {
            position: relative;
            padding: 100px 0;
            text-align: center;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(circle 400px at 50% 0%, rgba(6, 182, 212, 0.12), transparent 70%),
                radial-gradient(circle 300px at 80% 100%, rgba(139, 92, 246, 0.1), transparent 70%);
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 {
            font-size: 38px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .cta-section p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }

        /* FAQ */
        .faq-layout {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 48px;
            align-items: start;
        }
        .faq-panel {
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-glass);
            backdrop-filter: blur(8px);
        }
        .faq-item { border-bottom: 1px solid var(--border-glass); }
        .faq-item:last-child { border-bottom: none; }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 26px;
            background: none;
            border: none;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            transition: all 0.3s ease;
        }
        .faq-question:hover { background: rgba(6, 182, 212, 0.04); }
        .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-dim);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            flex-shrink: 0;
            transition: all 0.3s ease;
        }
        .faq-item.open .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-answer-inner {
            padding: 0 26px 22px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.85;
            border-left: 2px solid var(--primary);
            margin-left: 26px;
        }
        .faq-side {
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.06), rgba(139, 92, 246, 0.05));
            border: 1px solid rgba(6, 182, 212, 0.2);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            text-align: center;
        }
        .faq-side h3 { font-size: 20px; font-weight: 600; margin-bottom: 12px; }
        .faq-side p { font-size: 14px; color: var(--text-secondary); margin-bottom: 24px; line-height: 1.7; }

        /* ===== Footer ===== */
        .site-footer {
            background: #041228;
            border-top: 1px solid rgba(6, 182, 212, 0.2);
            padding-top: 64px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .footer-security {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .sec-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-glass);
            border-radius: 8px;
            padding: 6px 12px;
        }
        .sec-badge i { color: var(--success); }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 18px;
        }
        .footer-col ul { list-style: none; }
        .footer-col li { margin-bottom: 10px; }
        .footer-col a {
            font-size: 14px;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.3s ease;
        }
        .footer-col a i { font-size: 11px; color: var(--text-muted); }
        .footer-col a:hover { color: var(--primary); padding-left: 4px; }
        .contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 14px;
        }
        .contact-item i { color: var(--primary); width: 16px; text-align: center; }
        .footer-bottom {
            border-top: 1px solid var(--border-glass);
            padding: 24px 0;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== Modal ===== */
        .modal-overlay {
            position: fixed;
            inset: 0;
            background: rgba(2, 6, 17, 0.7);
            backdrop-filter: blur(4px);
            z-index: 500;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            padding: 20px;
        }
        .modal-overlay.open { opacity: 1; visibility: visible; }
        .modal-dialog {
            background: rgba(13, 20, 36, 0.96);
            backdrop-filter: blur(24px);
            border: 1px solid rgba(6, 182, 212, 0.25);
            border-radius: 24px;
            padding: 40px;
            max-width: 480px;
            width: 100%;
            box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6), 0 0 60px rgba(6, 182, 212, 0.08);
            transform: translateY(16px) scale(0.98);
            transition: all 0.35s ease;
            max-height: 90vh;
            overflow-y: auto;
        }
        .modal-overlay.open .modal-dialog { transform: translateY(0) scale(1); }
        .modal-close {
            position: absolute;
            top: 18px;
            right: 18px;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-glass);
            color: var(--text-secondary);
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }
        .modal-close:hover { color: var(--text-primary); background: rgba(255, 255, 255, 0.1); }
        .modal-dialog h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .modal-dialog .modal-sub {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .modal-form {
            display: grid;
            gap: 16px;
        }
        .modal-form input,
        .modal-form select {
            width: 100%;
            padding: 14px 16px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            color: var(--text-primary);
            font-size: 14px;
            transition: all 0.3s ease;
        }
        .modal-form input:focus,
        .modal-form select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
        }
        .modal-form input::placeholder { color: var(--text-muted); }
        .modal-form select { appearance: none; background-image: url("data:image/svg+xml,..."); }
        .modal-form select option { background: #0B1120; color: var(--text-primary); }
        .modal-dialog .btn-primary { width: 100%; margin-top: 8px; }
        .privacy-note {
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
            margin-top: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
        }
        .privacy-note i { color: var(--success); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .main-nav { display: none; }
            .hamburger { display: flex; }
            .header-actions .btn-primary { display: none; }
            .overview-grid { grid-template-columns: 1fr; gap: 32px; }
            .capabilities-grid { grid-template-columns: repeat(2, 1fr); }
            .capability-card:nth-child(n) { grid-column: span 1; }
            .industry-grid { grid-template-columns: repeat(2, 1fr); }
            .metrics-grid { grid-template-columns: repeat(2, 1fr); }
            .faq-layout { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .category-hero h1 { font-size: 36px; }
            .section-title { font-size: 30px; }
        }

        @media (max-width: 768px) {
            .container { padding: 0 16px; }
            .section { padding: 60px 0; }
            .category-hero { padding: 56px 0 44px; }
            .category-hero h1 { font-size: 30px; }
            .category-hero p.lead { font-size: 15px; }
            .hero-ctas { flex-direction: column; width: 100%; }
            .hero-ctas .btn-primary,
            .hero-ctas .btn-secondary { width: 100%; }
            .overview-points li { flex-direction: row; }
            .timeline-item { padding-left: 64px; }
            .timeline::before { left: 14px; }
            .timeline-dot { width: 28px; height: 28px; left: 4px; }
            .timeline-card { padding: 20px; }
            .capabilities-grid { grid-template-columns: 1fr; }
            .capability-card:nth-child(n) { grid-column: span 1; }
            .industry-grid { grid-template-columns: 1fr; }
            .metrics-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .metric-number { font-size: 40px; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .cta-section h2 { font-size: 28px; }
            .modal-dialog { padding: 28px 24px; }
        }

        @media (max-width: 520px) {
            .brand-logo { font-size: 16px; }
            .brand-icon { width: 32px; height: 32px; font-size: 14px; }
            .header-inner { height: 60px; }
            .category-hero h1 { font-size: 26px; }
            .section-title { font-size: 26px; }
            .metrics-grid { grid-template-columns: 1fr 1fr; }
            .metric-number { font-size: 34px; }
            .timeline-item { padding-left: 52px; }
            .timeline-card { padding: 16px; }
            .faq-question { font-size: 14px; padding: 16px 18px; }
            .faq-answer-inner { padding-left: 18px; }
        }

        :focus-visible {
            outline: 3px solid rgba(6, 182, 212, 0.4);
            outline-offset: 2px;
        }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --bg-primary: #060A14;
            --bg-secondary: #0B1120;
            --bg-elevated: rgba(15, 23, 42, 0.6);
            --bg-glass: rgba(255, 255, 255, 0.04);
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(56, 189, 248, 0.25);
            --primary: #06B6D4;
            --primary-hover: #22D3EE;
            --primary-dim: rgba(6, 182, 212, 0.15);
            --secondary: #8B5CF6;
            --accent: #F59E0B;
            --text-primary: #E2E8F0;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --success: #10B981;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 24px rgba(6, 182, 212, 0.15);
            --shadow-glow-strong: 0 0 32px rgba(6, 182, 212, 0.3);
            --font-sans: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", system-ui, -apple-system, sans-serif;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease;
        }

        img {
            max-width: 100%;
            display: block;
        }

        ul,
        ol {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        button {
            font-family: inherit;
            border: none;
            cursor: pointer;
            background: none;
        }

        input,
        select {
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== 背景光斑 ===== */
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -2;
            pointer-events: none;
            background:
                radial-gradient(600px 320px at 85% 8%, rgba(6, 182, 212, 0.10), transparent 65%),
                radial-gradient(700px 400px at 10% 90%, rgba(139, 92, 246, 0.08), transparent 60%);
        }

        body::after {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
            background-size: 44px 44px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(6, 10, 20, 0.65);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .site-header::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -1px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(6, 182, 212, 0.35), transparent);
            opacity: 0;
            transition: opacity .3s;
        }

        .site-header.scrolled::after {
            opacity: 1;
        }

        .topbar {
            background: linear-gradient(90deg, rgba(6, 182, 212, 0.18), rgba(139, 92, 246, 0.12), rgba(6, 182, 212, 0.18));
            color: var(--text-secondary);
            font-size: 13px;
            text-align: center;
            padding: 8px 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            letter-spacing: .02em;
        }

        .topbar i {
            color: var(--primary);
            margin-right: 6px;
        }

        .header-main {
            position: relative;
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            gap: 24px;
            height: 72px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-size: 21px;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text-primary);
        }

        .brand-logo .brand-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: linear-gradient(135deg, #06B6D4, #8B5CF6);
            color: #fff;
            font-size: 17px;
            font-weight: 700;
            box-shadow: 0 0 18px rgba(6, 182, 212, 0.45);
        }

        .main-nav {
            flex: 1;
            display: flex;
            align-items: center;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-links>li {
            position: relative;
        }

        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 14px;
            border-radius: 8px;
            font-size: 15px;
            color: var(--text-secondary);
            font-weight: 500;
            position: relative;
            transition: color .25s, background .25s;
        }

        .nav-item i {
            font-size: 12px;
            transition: transform .3s;
        }

        .nav-item:hover,
        .nav-item.active {
            color: var(--primary);
            background: rgba(6, 182, 212, 0.06);
        }

        .nav-item.active {
            font-weight: 600;
        }

        .nav-item.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }

        .has-mega:hover .nav-item i {
            transform: rotate(180deg);
        }

        .mega-menu {
            position: absolute;
            top: calc(100% + 10px);
            left: 50%;
            transform: translateX(-50%) translateY(10px);
            width: 720px;
            background: rgba(11, 17, 32, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card), 0 0 30px rgba(6, 182, 212, 0.08);
            padding: 24px;
            opacity: 0;
            visibility: hidden;
            transition: opacity .25s ease, transform .25s ease, visibility .25s;
            z-index: 120;
        }

        .has-mega:hover .mega-menu {
            opacity: 1;
            visibility: visible;
            transform: translateX(-50%) translateY(0);
        }

        .mega-inner {
            display: grid;
            grid-template-columns: 1.2fr 1.1fr 1fr;
            gap: 24px;
        }

        .mega-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            margin: 0 0 14px;
            letter-spacing: .04em;
        }

        .mega-link {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 10px;
            border-radius: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            transition: background .2s, color .2s;
        }

        .mega-link i {
            color: var(--primary);
            width: 18px;
            text-align: center;
            font-size: 14px;
        }

        .mega-link:hover {
            background: rgba(6, 182, 212, 0.08);
            color: var(--primary);
        }

        .mega-cta-card {
            background: linear-gradient(145deg, rgba(6, 182, 212, 0.14), rgba(139, 92, 246, 0.12));
            border: 1px solid rgba(6, 182, 212, 0.18);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .mega-cta-card p {
            font-size: 13px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin: 0;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-phone {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: 8px;
        }

        .nav-phone i {
            color: var(--primary);
        }

        .nav-phone:hover {
            color: var(--primary);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, #06B6D4, #8B5CF6);
            box-shadow: 0 0 24px rgba(6, 182, 212, 0.3);
            transition: all .25s ease;
            white-space: nowrap;
            cursor: pointer;
        }

        .btn-primary:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 36px rgba(6, 182, 212, 0.45);
            transform: scale(1.02);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-primary:focus-visible,
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(6, 182, 212, 0.4);
            outline-offset: 2px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--primary);
            background: transparent;
            border: 1px solid rgba(6, 182, 212, 0.5);
            transition: all .25s;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-secondary:hover {
            background: rgba(6, 182, 212, 0.1);
            border-color: var(--primary);
        }

        .btn-secondary:active {
            transform: scale(0.98);
        }

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
            font-size: 18px;
            transition: background .2s;
        }

        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            inset: 0;
            top: 0;
            background: rgba(6, 10, 20, 0.96);
            backdrop-filter: blur(24px);
            padding: 80px 32px 32px;
            flex-direction: column;
            z-index: 200;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .close-btn {
            position: absolute;
            top: 20px;
            right: 20px;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-primary);
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .mobile-menu ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-menu ul a {
            display: block;
            padding: 16px 12px;
            font-size: 18px;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .mobile-menu ul a:hover {
            background: rgba(6, 182, 212, 0.1);
            color: var(--primary);
        }

        .mobile-menu-footer {
            margin-top: 24px;
        }

        .mobile-menu-footer .btn-primary {
            width: 100%;
        }

        /* ===== 内页 Hero ===== */
        .cat-hero {
            position: relative;
            padding: 88px 0 72px;
            background:
                linear-gradient(120deg, rgba(6, 10, 20, 0.92), rgba(6, 10, 20, 0.75)),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            overflow: hidden;
        }

        .cat-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(700px 300px at 80% 10%, rgba(6, 182, 212, 0.14), transparent 60%);
        }

        .cat-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color .2s;
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb i {
            font-size: 12px;
            color: var(--text-muted);
        }

        .cat-hero h1 {
            font-size: 42px;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin: 0 0 16px;
            color: #fff;
        }

        .cat-hero .hero-sub {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 640px;
            margin: 0 0 28px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }

        .section-alt {
            background: rgba(11, 17, 32, 0.4);
            border-top: 1px solid rgba(255, 255, 255, 0.03);
            border-bottom: 1px solid rgba(255, 255, 255, 0.03);
        }

        .section-head {
            margin-bottom: 48px;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-dim);
            padding: 6px 14px;
            border-radius: 40px;
            margin-bottom: 14px;
            letter-spacing: .02em;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            margin: 0;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .section-head p {
            margin: 12px 0 0;
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 680px;
            line-height: 1.8;
        }

        /* ===== 徽章宫格 ===== */
        .badge-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .badge-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            position: relative;
            transition: all .3s ease;
            overflow: hidden;
        }

        .badge-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 20px;
            right: 20px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(6, 182, 212, 0.3), transparent);
        }

        .badge-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }

        .badge-card .badge-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            background: var(--primary-dim);
            margin-bottom: 18px;
        }

        .badge-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin: 0 0 8px;
            color: var(--text-primary);
        }

        .badge-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* ===== 图文简介 ===== */
        .split-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .split-grid .visual-wrap {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-card);
        }

        .split-grid .visual-wrap img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }

        .split-grid .visual-wrap::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(6, 10, 20, 0.65));
            pointer-events: none;
        }

        .split-grid .visual-caption {
            position: absolute;
            left: 24px;
            right: 24px;
            bottom: 20px;
            z-index: 2;
            color: #fff;
        }

        .visual-caption .caption-tag {
            display: inline-block;
            font-size: 12px;
            background: rgba(6, 182, 212, 0.3);
            border: 1px solid rgba(6, 182, 212, 0.4);
            border-radius: 40px;
            padding: 4px 12px;
            margin-bottom: 8px;
            color: var(--primary-hover);
        }

        .visual-caption p {
            font-size: 16px;
            font-weight: 600;
            margin: 0;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
        }

        .content-list {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .content-list .list-item {
            display: flex;
            gap: 14px;
            padding: 18px 20px;
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            transition: all .25s;
        }

        .content-list .list-item:hover {
            border-color: var(--border-glow);
            background: rgba(6, 182, 212, 0.05);
        }

        .list-item i {
            color: var(--primary);
            font-size: 18px;
            margin-top: 3px;
        }

        .list-item h3 {
            font-size: 16px;
            font-weight: 600;
            margin: 0 0 4px;
            color: var(--text-primary);
        }

        .list-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* ===== 数据条 ===== */
        .data-strip {
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.12), rgba(139, 92, 246, 0.12));
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-xl);
            padding: 40px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .data-item {
            text-align: center;
            padding: 16px 12px;
            border-radius: var(--radius-md);
            transition: background .3s;
        }

        .data-item:hover {
            background: rgba(255, 255, 255, 0.03);
        }

        .data-num {
            font-size: 48px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .data-divider {
            width: 32px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            margin: 10px auto;
            border-radius: 2px;
        }

        .data-label {
            font-size: 14px;
            color: var(--text-secondary);
        }

        /* ===== 流程 / 时间线 ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .process-grid::before {
            content: "";
            position: absolute;
            top: 70px;
            left: 60px;
            right: 60px;
            height: 1px;
            background: linear-gradient(90deg, rgba(6, 182, 212, 0.2), rgba(139, 92, 246, 0.2));
        }

        .process-card {
            text-align: center;
            padding: 24px 20px;
            position: relative;
        }

        .process-step {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.3), rgba(139, 92, 246, 0.3));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            border: 1px solid rgba(6, 182, 212, 0.4);
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.2);
            position: relative;
            z-index: 2;
        }

        .process-card h3 {
            font-size: 16px;
            font-weight: 600;
            margin: 0 0 8px;
            color: var(--text-primary);
        }

        .process-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* ===== FAQ ===== */
        .faq-layout {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 32px;
            align-items: start;
        }

        .faq-side-card {
            background: linear-gradient(145deg, rgba(6, 182, 212, 0.1), rgba(139, 92, 246, 0.1));
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 28px;
            position: sticky;
            top: 100px;
        }

        .faq-side-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin: 0 0 12px;
            color: var(--text-primary);
        }

        .faq-side-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 20px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color .3s;
        }

        .faq-item[open] {
            border-color: rgba(6, 182, 212, 0.35);
        }

        .faq-item summary {
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: color .2s;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: "\f067";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 14px;
            color: var(--primary);
            transition: transform .3s;
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
            color: var(--accent);
        }

        .faq-item summary:hover {
            color: var(--primary);
        }

        .faq-answer {
            padding: 0 22px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.85;
            border-left: 2px solid rgba(6, 182, 212, 0.5);
            margin-left: 22px;
            margin-right: 22px;
            margin-bottom: 18px;
            padding-left: 16px;
        }

        /* ===== CTA ===== */
        .cta-box {
            position: relative;
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(139, 92, 246, 0.18));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            text-align: center;
            overflow: hidden;
        }

        .cta-box::before {
            content: "";
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at center, rgba(6, 182, 212, 0.08), transparent 60%);
            z-index: 0;
        }

        .cta-box .container {
            position: relative;
            z-index: 2;
        }

        .cta-box h2 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 12px;
        }

        .cta-box p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 28px;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #041228;
            border-top: 1px solid rgba(6, 182, 212, 0.15);
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand .footer-logo .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #06B6D4, #8B5CF6);
            font-size: 15px;
            font-weight: 700;
            color: #fff;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 20px;
        }

        .footer-security {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .sec-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-glass);
            border-radius: 40px;
            padding: 6px 12px;
        }

        .sec-badge i {
            color: var(--success);
            font-size: 12px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 18px;
            letter-spacing: .02em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            transition: all .2s;
        }

        .footer-col ul a i {
            font-size: 10px;
            color: var(--text-muted);
            transition: color .2s, transform .2s;
        }

        .footer-col ul a:hover {
            color: var(--primary);
        }

        .footer-col ul a:hover i {
            color: var(--primary);
            transform: translateX(3px);
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }

        .contact-item i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 20px 24px;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
        }

        /* ===== Modal ===== */
        .modal-overlay {
            position: fixed;
            inset: 0;
            z-index: 300;
            background: rgba(2, 6, 17, 0.72);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            display: none;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .modal-overlay.active {
            display: flex;
        }

        .modal-card {
            width: 100%;
            max-width: 480px;
            background: linear-gradient(145deg, rgba(15, 23, 42, 0.95), rgba(11, 17, 32, 0.98));
            border: 1px solid rgba(6, 182, 212, 0.3);
            border-radius: 20px;
            box-shadow: 0 0 48px rgba(6, 182, 212, 0.2);
            padding: 36px 32px;
            position: relative;
        }

        .modal-card h2 {
            font-size: 22px;
            font-weight: 700;
            margin: 0 0 8px;
            color: #fff;
        }

        .modal-card .modal-sub {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group select {
            width: 100%;
            padding: 12px 14px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            border-radius: 10px;
            color: var(--text-primary);
            font-size: 15px;
            transition: border-color .25s, box-shadow .25s;
        }

        .form-group input:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.2);
        }

        .form-group select option {
            background: #0B1120;
        }

        .modal-card .btn-primary {
            width: 100%;
            margin-top: 8px;
        }

        .modal-privacy {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 16px;
        }

        .modal-privacy i {
            color: var(--success);
            font-size: 14px;
        }

        .modal-close {
            position: absolute;
            top: 18px;
            right: 18px;
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-secondary);
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all .2s;
        }

        .modal-close:hover {
            background: rgba(255, 255, 255, 0.1);
            color: var(--text-primary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .badge-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                row-gap: 36px;
            }

            .process-grid::before {
                display: none;
            }

            .data-strip {
                grid-template-columns: repeat(2, 1fr);
            }

            .split-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .faq-layout {
                grid-template-columns: 1fr;
            }

            .faq-side-card {
                position: static;
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .main-nav {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .nav-phone {
                display: none;
            }

            .nav-cta {
                display: none;
            }

            .cat-hero {
                padding: 56px 0 48px;
            }

            .cat-hero h1 {
                font-size: 32px;
            }

            .hero-sub {
                font-size: 15px;
            }

            .section {
                padding: 56px 0;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .badge-grid {
                grid-template-columns: 1fr;
            }

            .process-grid {
                grid-template-columns: 1fr;
            }

            .data-strip {
                grid-template-columns: 1fr 1fr;
                padding: 24px;
            }

            .data-num {
                font-size: 36px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-bottom {
                padding: 16px;
            }

            .mega-menu {
                display: none;
            }

            .cta-box {
                padding: 40px 24px;
            }

            .cta-box h2 {
                font-size: 26px;
            }

            .modal-card {
                padding: 28px 20px;
            }
        }

        @media (max-width: 520px) {
            .hero-actions {
                flex-direction: column;
            }

            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }

            .data-strip {
                grid-template-columns: 1fr;
            }

            .split-grid .visual-wrap img {
                height: 280px;
            }
        }