/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0b1628;
            --brand: #1a7aff;
            --accent: #7c3aed;
            --gray: #94a3b8;
            --success: #10b981;
            --warning: #f59e0b;
            --white: #f1f5f9;
            --white-pure: #ffffff;
            --bg-dark: #060b14;
            --bg-card: #0a1420;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-medium: rgba(255, 255, 255, 0.12);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 12px 48px rgba(0, 0, 0, 0.6);
            --font-stack: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --gap: 24px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-stack);
            background: var(--primary);
            color: var(--white);
            line-height: 1.8;
            font-size: 1rem;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--brand); text-decoration: none; transition: color var(--transition); }
        a:hover { color: #3b9aff; }
        img { max-width: 100%; height: auto; display: block; }
        ul { list-style: none; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--gap); }
        .section-padding { padding: 80px 0; }
        .text-center { text-align: center; }
        .text-gray { color: var(--gray); }

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.2; color: var(--white-pure); }
        h1 { font-size: 2.75rem; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; font-weight: 600; }
        h4 { font-size: 1.125rem; font-weight: 600; }
        p { margin-bottom: 1rem; color: var(--white); }
        .text-small { font-size: 0.875rem; color: var(--gray); }

        /* ===== Glass Card ===== */
        .glass-card {
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }
        .glass-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(26, 122, 255, 0.2);
        }
        .glass-card-sm {
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
            transition: all var(--transition);
        }
        .glass-card-sm:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-block;
            padding: 14px 36px;
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--white-pure);
            background: linear-gradient(135deg, var(--brand), var(--accent));
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            box-shadow: 0 0 20px rgba(26, 122, 255, 0.35), 0 0 40px rgba(26, 122, 255, 0.15);
            transition: all var(--transition);
            text-align: center;
            line-height: 1.4;
        }
        .btn-primary:hover {
            box-shadow: 0 0 32px rgba(26, 122, 255, 0.55), 0 0 60px rgba(26, 122, 255, 0.25);
            transform: translateY(-2px);
            background: linear-gradient(135deg, var(--accent), var(--brand));
            color: var(--white-pure);
        }
        .btn-primary:active {
            transform: scale(0.97);
            box-shadow: 0 0 14px rgba(26, 122, 255, 0.25);
        }
        .btn-outline {
            display: inline-block;
            padding: 14px 36px;
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--white-pure);
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition);
            text-align: center;
            line-height: 1.4;
        }
        .btn-outline:hover {
            border-color: var(--brand);
            background: rgba(26, 122, 255, 0.08);
            color: var(--white-pure);
        }
        .btn-outline:active { transform: scale(0.97); }

        /* ===== Badge ===== */
        .badge {
            display: inline-block;
            padding: 4px 12px;
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--white-pure);
            background: var(--brand);
            border-radius: 4px;
            line-height: 1.4;
        }
        .badge-accent { background: var(--accent); }
        .badge-success { background: var(--success); }
        .badge-warning { background: var(--warning); color: #1a1a2e; }

        /* ===== Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 22, 40, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            transition: background var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .site-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--white-pure);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .site-logo span { color: var(--brand); }
        .site-logo .badge-official {
            display: inline-block;
            background: var(--success);
            color: #fff;
            font-size: 0.65rem;
            font-weight: 600;
            padding: 2px 8px;
            border-radius: 4px;
            margin-left: 6px;
            letter-spacing: 0.5px;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        .nav-list a {
            color: var(--white);
            font-size: 1rem;
            font-weight: 500;
            position: relative;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--brand);
            transition: width var(--transition);
            border-radius: 2px;
        }
        .nav-list a:hover { color: var(--brand); }
        .nav-list a:hover::after { width: 100%; }
        .nav-list a.active { color: var(--brand); }
        .nav-list a.active::after { width: 100%; }
        .nav-cta {
            margin-left: 16px;
        }
        .nav-cta .btn-primary {
            padding: 10px 24px;
            font-size: 0.95rem;
            box-shadow: 0 0 16px rgba(26, 122, 255, 0.3);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--white-pure);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 4px;
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            background: linear-gradient(135deg, #060b14, #0d1a2d);
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            padding-top: 70px;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(26, 122, 255, 0.12), transparent 70%);
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.08), transparent 70%);
            pointer-events: none;
        }
        .hero .container { position: relative; z-index: 2; width: 100%; }
        .hero-content { display: flex; align-items: center; gap: 48px; }
        .hero-text { flex: 0 0 55%; }
        .hero-image { flex: 0 0 45%; }
        .hero-image img {
            width: 100%;
            border-radius: 24px;
            box-shadow: 0 0 60px rgba(26, 122, 255, 0.15);
            border: 1px solid var(--border-light);
        }
        .hero h1 { margin-bottom: 20px; font-size: 2.75rem; }
        .hero .subtitle {
            font-size: 1.25rem;
            color: var(--gray);
            margin-bottom: 32px;
            line-height: 1.6;
        }
        .hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-note {
            margin-top: 20px;
            font-size: 0.85rem;
            color: var(--gray);
        }

        /* ===== Solution Section ===== */
        .solution-section {
            background: var(--bg-card);
        }
        .section-title { margin-bottom: 16px; }
        .section-subtitle { color: var(--gray); font-size: 1.1rem; margin-bottom: 48px; max-width: 700px; }
        .solution-grid { display: flex; gap: var(--gap); flex-wrap: wrap; }
        .solution-left { flex: 1 1 48%; }
        .solution-right { flex: 1 1 48%; }
        .solution-card {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            margin-bottom: 20px;
        }
        .solution-card .icon {
            font-size: 2rem;
            flex-shrink: 0;
            width: 48px;
            text-align: center;
        }
        .solution-card h4 { margin-bottom: 4px; }
        .solution-card p { font-size: 0.95rem; color: var(--gray); margin-bottom: 0; }
        .solution-list-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 16px;
            transition: all var(--transition);
        }
        .solution-list-card:hover {
            background: rgba(26, 122, 255, 0.06);
            border-color: rgba(26, 122, 255, 0.15);
        }
        .solution-list-card .num {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--brand);
            min-width: 32px;
        }
        .solution-list-card p { margin-bottom: 0; font-size: 0.95rem; }

        /* ===== Data/Stats ===== */
        .stats-section {
            background: var(--bg-dark);
        }
        .stats-grid { display: flex; gap: var(--gap); flex-wrap: wrap; justify-content: center; }
        .stat-card {
            flex: 1 1 200px;
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }
        .stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .stat-card .icon { font-size: 2.2rem; margin-bottom: 12px; }
        .stat-card .number { font-size: 3rem; font-weight: 700; line-height: 1.1; color: var(--brand); }
        .stat-card .label { font-size: 1rem; color: var(--gray); margin-top: 8px; }

        /* ===== Testimonials ===== */
        .testimonials-section {
            background: var(--primary);
        }
        .testimonial-main {
            display: flex;
            gap: var(--gap);
            flex-wrap: wrap;
        }
        .testimonial-left {
            flex: 1 1 55%;
            padding: 32px;
            position: relative;
        }
        .testimonial-left .quote-icon {
            font-size: 4rem;
            color: var(--brand);
            opacity: 0.3;
            line-height: 1;
            margin-bottom: -16px;
        }
        .testimonial-left .quote-text {
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 24px;
            font-style: italic;
        }
        .testimonial-author { display: flex; align-items: center; gap: 12px; }
        .testimonial-author img {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid var(--brand);
        }
        .testimonial-author .name { font-weight: 600; font-size: 1rem; }
        .testimonial-author .role { font-size: 0.85rem; color: var(--gray); }
        .testimonial-right {
            flex: 1 1 40%;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .testimonial-mini {
            padding: 16px 20px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            backdrop-filter: blur(12px);
            transition: all var(--transition);
        }
        .testimonial-mini:hover { border-color: rgba(26, 122, 255, 0.15); }
        .testimonial-mini .stars { color: var(--warning); font-size: 0.9rem; margin-bottom: 4px; }
        .testimonial-mini p { font-size: 0.9rem; margin-bottom: 4px; color: var(--white); }
        .testimonial-mini .name { font-size: 0.8rem; color: var(--gray); }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #060b14, #0d1a2d);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 800px;
            height: 800px;
            background: radial-gradient(circle, rgba(26, 122, 255, 0.06), transparent 70%);
            pointer-events: none;
        }
        .cta-content { position: relative; z-index: 2; text-align: center; padding: 60px 0; }
        .cta-content h2 { font-size: 2.2rem; margin-bottom: 16px; }
        .cta-content p { color: var(--gray); font-size: 1.1rem; margin-bottom: 32px; max-width: 600px; margin-left: auto; margin-right: auto; }
        .cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .cta-note { margin-top: 20px; font-size: 0.85rem; color: var(--gray); }

        /* ===== News/List Section ===== */
        .news-section {
            background: var(--bg-card);
        }
        .news-grid { display: flex; gap: var(--gap); flex-wrap: wrap; }
        .news-card {
            flex: 1 1 calc(25% - 18px);
            min-width: 240px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
            cursor: pointer;
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(26, 122, 255, 0.2);
        }
        .news-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            border-bottom: 1px solid var(--border-light);
        }
        .news-card .card-body { padding: 16px 20px 20px; }
        .news-card .card-title {
            font-size: 1.1rem;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .news-card .card-excerpt {
            font-size: 0.9rem;
            color: var(--gray);
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .news-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
        }
        .news-card .card-meta .badge { font-size: 0.7rem; padding: 2px 10px; }
        .news-card .card-meta .date { font-size: 0.8rem; color: var(--gray); }
        .news-empty {
            text-align: center;
            padding: 60px 20px;
            color: var(--gray);
            font-size: 1.1rem;
            width: 100%;
        }
        .news-empty i { font-size: 2.5rem; margin-bottom: 16px; opacity: 0.5; display: block; }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--primary);
        }
        .faq-grid {
            display: flex;
            gap: var(--gap);
            flex-wrap: wrap;
        }
        .faq-left { flex: 1 1 48%; }
        .faq-right { flex: 1 1 48%; }
        .faq-item {
            padding: 16px 20px 16px 36px;
            border-bottom: 1px solid var(--border-light);
            position: relative;
            cursor: pointer;
            transition: background var(--transition);
        }
        .faq-item:hover { background: rgba(255, 255, 255, 0.02); }
        .faq-item::before {
            content: '+';
            position: absolute;
            left: 8px;
            top: 16px;
            font-size: 1.2rem;
            color: var(--brand);
            font-weight: 700;
        }
        .faq-item.open::before { content: '−'; }
        .faq-item h4 { font-size: 1.05rem; margin-bottom: 4px; }
        .faq-item p { font-size: 0.9rem; color: var(--gray); margin-bottom: 0; line-height: 1.6; }

        /* ===== Footer ===== */
        .site-footer {
            background: #060b14;
            padding: 60px 0 0;
            border-top: 1px solid var(--border-light);
        }
        .footer-grid {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }
        .footer-col { flex: 1 1 200px; }
        .footer-col h4 { font-size: 1rem; margin-bottom: 16px; color: var(--white-pure); }
        .footer-col p, .footer-col li { font-size: 0.9rem; color: var(--gray); margin-bottom: 8px; }
        .footer-col ul li a { color: var(--gray); transition: color var(--transition); }
        .footer-col ul li a:hover { color: var(--brand); }
        .footer-col .social-links { display: flex; gap: 12px; margin-top: 12px; }
        .footer-col .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid var(--border-light);
            color: var(--gray);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-col .social-links a:hover {
            border-color: var(--brand);
            color: var(--brand);
            background: rgba(26, 122, 255, 0.08);
        }
        .footer-bottom {
            text-align: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: var(--gray);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            .hero-content { flex-direction: column; text-align: center; }
            .hero-text { flex: 1 1 100%; }
            .hero-image { flex: 1 1 100%; max-width: 500px; margin: 0 auto; }
            .hero-buttons { justify-content: center; }
            .hero .subtitle { max-width: 600px; margin-left: auto; margin-right: auto; }
            .section-subtitle { margin-left: auto; margin-right: auto; }
            .solution-left, .solution-right { flex: 1 1 100%; }
            .testimonial-left, .testimonial-right { flex: 1 1 100%; }
            .faq-left, .faq-right { flex: 1 1 100%; }
            .stat-card { flex: 1 1 45%; }
            .news-card { flex: 1 1 calc(50% - 12px); }
        }
        @media (max-width: 768px) {
            .section-padding { padding: 48px 0; }
            h1 { font-size: 1.75rem; }
            h2 { font-size: 1.5rem; }
            h3 { font-size: 1.25rem; }
            .nav-list { display: none; }
            .hamburger { display: block; }
            .nav-list.open {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(11, 22, 40, 0.97);
                backdrop-filter: blur(20px);
                padding: 24px;
                gap: 16px;
                border-bottom: 1px solid var(--border-light);
                z-index: 999;
            }
            .nav-list.open a { font-size: 1.1rem; padding: 8px 0; }
            .nav-cta { margin-left: 0; margin-top: 8px; }
            .hero { min-height: auto; padding: 100px 0 60px; }
            .hero h1 { font-size: 1.75rem; }
            .hero .subtitle { font-size: 1rem; }
            .stat-card { flex: 1 1 100%; max-width: 280px; margin: 0 auto; }
            .stat-card .number { font-size: 2.2rem; }
            .news-card { flex: 1 1 100%; }
            .cta-content h2 { font-size: 1.6rem; }
            .footer-grid { flex-direction: column; gap: 24px; }
            .footer-col { flex: 1 1 100%; }
            .testimonial-left { padding: 20px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-buttons { flex-direction: column; align-items: center; }
            .hero-buttons .btn-primary, .hero-buttons .btn-outline { width: 100%; text-align: center; }
            .cta-buttons { flex-direction: column; align-items: center; }
            .cta-buttons .btn-primary, .cta-buttons .btn-outline { width: 100%; text-align: center; }
            .solution-card { flex-direction: column; }
            .stat-card { padding: 24px 12px; }
        }

        /* ===== Utility ===== */
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .mb-32 { margin-bottom: 32px; }
        .mb-48 { margin-bottom: 48px; }
        .mt-16 { margin-top: 16px; }
        .mt-32 { margin-top: 32px; }
        .gap-16 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== Mobile Nav Toggle ===== */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            height: calc(100vh - 70px);
            background: rgba(0,0,0,0.5);
            z-index: 998;
        }
        .mobile-nav-overlay.open { display: block; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #0b1628;
            --brand: #1a7aff;
            --accent: #7c3aed;
            --silver: #94a3b8;
            --white: #f1f5f9;
            --pure-white: #ffffff;
            --success: #10b981;
            --warning: #f59e0b;
            --bg-gradient-start: #060b14;
            --bg-gradient-end: #0d1a2d;
            --card-bg: #0a1420;
            --font-stack: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-xs: 4px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 12px 48px rgba(0, 0, 0, 0.6);
            --transition: all 0.3s ease;
            --max-width: 1200px;
            --padding-section: 80px 0;
            --padding-mobile: 48px 0;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background-color: var(--primary);
            color: var(--white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--brand);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }

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

        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Typography ===== */
        h1 {
            font-size: 2.75rem;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--pure-white);
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--pure-white);
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--pure-white);
        }
        h4 {
            font-size: 1.125rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--pure-white);
        }
        p {
            font-size: 1rem;
            line-height: 1.8;
            color: var(--white);
        }
        .text-muted {
            color: var(--silver);
            font-size: 0.875rem;
        }
        .text-small {
            font-size: 0.875rem;
            color: var(--silver);
        }
        .text-brand {
            color: var(--brand);
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-block;
            padding: 14px 36px;
            font-size: 1.125rem;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--brand), var(--accent));
            color: var(--pure-white);
            cursor: pointer;
            box-shadow: 0 0 20px rgba(26, 122, 255, 0.35), 0 0 40px rgba(26, 122, 255, 0.15);
            transition: var(--transition);
            text-align: center;
            line-height: 1.4;
        }
        .btn-primary:hover {
            box-shadow: 0 0 35px rgba(26, 122, 255, 0.55), 0 0 60px rgba(26, 122, 255, 0.3);
            transform: translateY(-2px);
            background: linear-gradient(135deg, var(--accent), var(--brand));
            color: var(--pure-white);
        }
        .btn-primary:active {
            transform: scale(0.97);
            box-shadow: 0 0 15px rgba(26, 122, 255, 0.2);
        }

        .btn-secondary {
            display: inline-block;
            padding: 14px 36px;
            font-size: 1.125rem;
            font-weight: 600;
            border: 2px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-sm);
            background: transparent;
            color: var(--pure-white);
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            line-height: 1.4;
        }
        .btn-secondary:hover {
            border-color: var(--brand);
            background: rgba(26, 122, 255, 0.08);
            color: var(--pure-white);
        }
        .btn-secondary:active {
            transform: scale(0.97);
        }

        .btn-small {
            padding: 8px 20px;
            font-size: 0.9rem;
        }

        /* ===== Badge ===== */
        .badge {
            display: inline-block;
            padding: 4px 12px;
            font-size: 0.75rem;
            font-weight: 500;
            border-radius: var(--radius-xs);
            color: var(--pure-white);
            background: var(--brand);
            line-height: 1.4;
        }
        .badge-accent {
            background: var(--accent);
        }
        .badge-success {
            background: var(--success);
        }
        .badge-warning {
            background: var(--warning);
        }

        /* ===== Glassmorphism ===== */
        .glass {
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            padding: 24px;
        }
        .glass:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .glass-light {
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
            padding: 20px;
        }

        /* ===== Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 22, 40, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding: 0 24px;
        }

        .site-header .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .site-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--pure-white);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .site-logo span {
            color: var(--brand);
        }
        .site-logo .badge {
            font-size: 0.65rem;
            padding: 2px 8px;
            background: var(--success);
            color: var(--pure-white);
            border-radius: var(--radius-xs);
            margin-left: 6px;
            font-weight: 500;
        }
        .site-logo:hover {
            color: var(--pure-white);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        .nav-list a {
            font-size: 1rem;
            font-weight: 500;
            color: var(--white);
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--brand);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-list a:hover::after,
        .nav-list a.active::after {
            width: 100%;
        }
        .nav-list a:hover {
            color: var(--brand);
        }
        .nav-list a.active {
            color: var(--brand);
        }
        .nav-list .nav-cta {
            margin-left: 8px;
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            background: none;
            border: none;
            padding: 8px;
            gap: 5px;
        }
        .hamburger span {
            display: block;
            width: 28px;
            height: 2px;
            background: var(--pure-white);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* Mobile nav overlay */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            width: 100%;
            height: calc(100vh - 72px);
            background: rgba(11, 22, 40, 0.97);
            backdrop-filter: blur(20px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: flex-start;
            padding: 48px 24px;
            gap: 24px;
        }
        .mobile-nav-overlay.open {
            display: flex;
        }
        .mobile-nav-overlay a {
            font-size: 1.5rem;
            font-weight: 500;
            color: var(--white);
            padding: 12px 0;
        }
        .mobile-nav-overlay a.active {
            color: var(--brand);
        }
        .mobile-nav-overlay .nav-cta {
            margin-top: 16px;
        }

        /* ===== Hero Banner (Article Page) ===== */
        .article-hero {
            padding: 140px 0 60px 0;
            background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(26, 122, 255, 0.08), transparent 70%);
            pointer-events: none;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: -10%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.06), transparent 70%);
            pointer-events: none;
        }

        .article-hero .hero-content {
            position: relative;
            z-index: 1;
        }

        .article-hero h1 {
            font-size: 2.5rem;
            margin-bottom: 16px;
            max-width: 900px;
        }

        .article-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            margin-top: 12px;
            color: var(--silver);
            font-size: 0.875rem;
        }
        .article-hero .hero-meta i {
            margin-right: 6px;
            color: var(--brand);
        }
        .article-hero .hero-meta span {
            display: inline-flex;
            align-items: center;
        }

        .article-hero .hero-desc {
            font-size: 1.05rem;
            color: var(--silver);
            line-height: 1.8;
            max-width: 800px;
            margin-top: 16px;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 20px 0 0 0;
            font-size: 0.875rem;
            color: var(--silver);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb a {
            color: var(--silver);
        }
        .breadcrumb a:hover {
            color: var(--brand);
        }
        .breadcrumb .sep {
            color: var(--silver);
            margin: 0 4px;
        }
        .breadcrumb .current {
            color: var(--brand);
            font-weight: 500;
        }

        /* ===== Article Main Content ===== */
        .article-main {
            padding: 60px 0;
            background: var(--primary);
        }

        .article-body {
            max-width: 780px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.02);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            border: 1px solid rgba(255, 255, 255, 0.05);
        }

        .article-body h2 {
            font-size: 1.75rem;
            margin-top: 40px;
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .article-body h3 {
            font-size: 1.35rem;
            margin-top: 32px;
            margin-bottom: 12px;
        }
        .article-body p {
            margin-bottom: 1.5rem;
            font-size: 1rem;
            line-height: 1.8;
            color: var(--white);
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 1.5rem;
            padding-left: 24px;
            list-style: disc;
            color: var(--white);
        }
        .article-body li {
            margin-bottom: 8px;
            line-height: 1.7;
        }
        .article-body blockquote {
            border-left: 4px solid var(--brand);
            padding: 16px 24px;
            margin: 24px 0;
            background: rgba(26, 122, 255, 0.05);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--silver);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            max-width: 100%;
        }
        .article-body a {
            color: var(--brand);
            text-decoration: underline;
        }
        .article-body a:hover {
            color: var(--accent);
        }

        .article-body .not-found {
            text-align: center;
            padding: 80px 20px;
            color: var(--silver);
        }
        .article-body .not-found i {
            font-size: 3rem;
            color: var(--silver);
            margin-bottom: 16px;
            display: block;
        }
        .article-body .not-found p {
            font-size: 1.2rem;
            color: var(--silver);
        }
        .article-body .not-found a {
            display: inline-block;
            margin-top: 16px;
            color: var(--brand);
            text-decoration: underline;
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0 80px 0;
            background: var(--card-bg);
        }
        .related-section h2 {
            text-align: center;
            margin-bottom: 40px;
        }

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

        .related-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            cursor: pointer;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(26, 122, 255, 0.2);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--bg-gradient-start);
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-body h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--pure-white);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.875rem;
            color: var(--silver);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== CTA Section ===== */
        .article-cta {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .article-cta::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 800px;
            height: 800px;
            background: radial-gradient(circle, rgba(26, 122, 255, 0.05), transparent 70%);
            pointer-events: none;
        }
        .article-cta .cta-inner {
            position: relative;
            z-index: 1;
        }
        .article-cta h2 {
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
        .article-cta p {
            font-size: 1.1rem;
            color: var(--silver);
            max-width: 600px;
            margin: 0 auto 32px auto;
        }
        .article-cta .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .article-cta .footnote {
            font-size: 0.8rem;
            color: var(--silver);
            margin-top: 20px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #060b14;
            padding: 60px 0 30px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .site-footer .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--pure-white);
            margin-bottom: 16px;
        }
        .site-footer .footer-col p {
            font-size: 0.875rem;
            color: var(--silver);
            line-height: 1.7;
        }
        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 10px;
            font-size: 0.875rem;
            color: var(--silver);
        }
        .site-footer .footer-col ul li a {
            color: var(--silver);
            transition: var(--transition);
        }
        .site-footer .footer-col ul li a:hover {
            color: var(--brand);
        }
        .site-footer .social-links {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .site-footer .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--silver);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .site-footer .social-links a:hover {
            border-color: var(--brand);
            color: var(--brand);
            background: rgba(26, 122, 255, 0.08);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 24px;
            text-align: center;
            font-size: 0.8rem;
            color: var(--silver);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-hero h1 {
                font-size: 2rem;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .article-hero {
                padding: 120px 0 40px 0;
            }
            .article-hero h1 {
                font-size: 1.75rem;
            }
            .article-body {
                padding: 28px 20px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-cta h2 {
                font-size: 1.6rem;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            :root {
                --padding-section: 48px 0;
            }
            .article-cta {
                padding: 48px 0;
            }
            .related-section {
                padding: 40px 0 48px 0;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-hero h1 {
                font-size: 1.5rem;
            }
            .article-hero .hero-meta {
                flex-direction: column;
                gap: 8px;
            }
            .article-body {
                padding: 20px 16px;
                border-radius: var(--radius-md);
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 24px;
                font-size: 1rem;
            }
            .article-cta .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .site-footer .footer-grid {
                gap: 20px;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .mt-40 {
            margin-top: 40px;
        }
        .mb-40 {
            margin-bottom: 40px;
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0b1628;
            --primary-dark: #060b14;
            --primary-light: #0d1a2d;
            --brand: #1a7aff;
            --brand-hover: #3391ff;
            --accent: #7c3aed;
            --accent-hover: #8b5cf6;
            --gray: #94a3b8;
            --gray-light: #cbd5e1;
            --text-primary: #f1f5f9;
            --text-heading: #ffffff;
            --text-muted: #94a3b8;
            --success: #10b981;
            --warning: #f59e0b;
            --danger: #ef4444;
            --border: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.12);
            --glass-bg: rgba(255, 255, 255, 0.04);
            --glass-bg-hover: rgba(255, 255, 255, 0.08);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-card-hover: 0 12px 48px rgba(0, 0, 0, 0.6);
            --shadow-btn: 0 0 20px rgba(26, 122, 255, 0.35), 0 0 40px rgba(26, 122, 255, 0.15);
            --shadow-btn-hover: 0 0 30px rgba(26, 122, 255, 0.5), 0 0 60px rgba(26, 122, 255, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-stack: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-stack);
            background: var(--primary);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--brand); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--brand-hover); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-heading); font-weight: 700; line-height: 1.3; }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== Grid Extensions ===== */
        .grid-x { margin-left: -12px; margin-right: -12px; }
        .grid-x > .cell { padding: 0 12px; }
        .grid-margin-x { margin-left: -12px; margin-right: -12px; }
        .grid-margin-x > .cell { padding: 0 12px; }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 22, 40, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .site-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-heading);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .site-logo span { color: var(--brand); }
        .site-logo .badge {
            font-size: 0.65rem;
            background: var(--success);
            color: #fff;
            padding: 2px 8px;
            border-radius: 4px;
            margin-left: 8px;
            font-weight: 500;
            letter-spacing: 0.02em;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        .nav-list a {
            color: var(--text-muted);
            font-size: 1rem;
            font-weight: 500;
            padding: 8px 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--brand);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-list a:hover { color: var(--text-heading); }
        .nav-list a:hover::after { width: 100%; }
        .nav-list a.active { color: var(--brand); }
        .nav-list a.active::after { width: 100%; }
        .nav-cta { margin-left: 16px; }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--brand), var(--accent));
            color: #fff;
            font-size: 1.125rem;
            font-weight: 600;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow-btn);
            text-decoration: none;
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--accent), var(--brand));
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:active {
            transform: scale(0.97);
            box-shadow: 0 0 10px rgba(26, 122, 255, 0.2);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--text-heading);
            font-size: 1.125rem;
            font-weight: 600;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            border: 2px solid rgba(255, 255, 255, 0.2);
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-secondary:hover {
            border-color: var(--brand);
            background: rgba(26, 122, 255, 0.08);
            color: var(--brand);
            transform: translateY(-2px);
        }
        .btn-secondary:active { transform: scale(0.97); }
        .btn-sm {
            padding: 10px 24px;
            font-size: 0.95rem;
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            border: none;
            padding: 8px;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* ===== Hero ===== */
        .page-hero {
            padding: 160px 0 100px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 50%, #0f1a2e 100%);
            position: relative;
            overflow: hidden;
            min-height: 50vh;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 30% 50%, rgba(26, 122, 255, 0.06) 0%, transparent 50%),
                        radial-gradient(circle at 70% 20%, rgba(124, 58, 237, 0.04) 0%, transparent 40%);
            pointer-events: none;
            animation: heroGlow 12s ease-in-out infinite alternate;
        }
        @keyframes heroGlow {
            0% { transform: translate(0, 0); }
            100% { transform: translate(-3%, 3%); }
        }
        .page-hero .container { position: relative; z-index: 2; }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(26, 122, 255, 0.12);
            border: 1px solid rgba(26, 122, 255, 0.2);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--brand);
            margin-bottom: 20px;
        }
        .page-hero .hero-badge i { font-size: 0.75rem; }
        .page-hero h1 {
            font-size: 2.75rem;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-heading);
            margin-bottom: 20px;
        }
        .page-hero h1 span { color: var(--brand); }
        .page-hero .hero-sub {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .page-hero .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .page-hero .hero-bg-img {
            position: absolute;
            right: 0;
            bottom: 0;
            width: 45%;
            height: 100%;
            object-fit: cover;
            opacity: 0.15;
            mask-image: linear-gradient(to left, rgba(0,0,0,0.5) 0%, transparent 100%);
            -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,0.5) 0%, transparent 100%);
            pointer-events: none;
        }
        .page-hero .deco-grid {
            position: absolute;
            right: 5%;
            top: 20%;
            width: 400px;
            height: 400px;
            background: 
                linear-gradient(rgba(26,122,255,0.06) 1px, transparent 1px),
                linear-gradient(90deg, rgba(26,122,255,0.06) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
            border-radius: 50%;
            opacity: 0.6;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 16px 0;
            background: rgba(11, 22, 40, 0.6);
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--text-muted);
        }
        .breadcrumb a { color: var(--text-muted); }
        .breadcrumb a:hover { color: var(--brand); }
        .breadcrumb .sep { color: var(--text-muted); opacity: 0.5; }
        .breadcrumb .current { color: var(--brand); }

        /* ===== Section Base ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .section-title h2 span { color: var(--brand); }
        .section-title p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* ===== Two Column Content ===== */
        .two-col-content {
            display: flex;
            gap: 48px;
            align-items: flex-start;
        }
        .two-col-content .main-col { flex: 0 0 60%; max-width: 60%; }
        .two-col-content .side-col { flex: 0 0 40%; max-width: 40%; }
        .main-col .content-block { margin-bottom: 40px; }
        .main-col .content-block:last-child { margin-bottom: 0; }
        .main-col .content-block h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .main-col .content-block h3 i { color: var(--brand); font-size: 1.3rem; }
        .main-col .content-block p {
            color: var(--text-muted);
            line-height: 1.9;
            margin-bottom: 16px;
            font-size: 1rem;
        }
        .main-col .content-block ul { padding-left: 0; }
        .main-col .content-block ul li {
            color: var(--text-muted);
            padding: 8px 0 8px 28px;
            position: relative;
            line-height: 1.7;
        }
        .main-col .content-block ul li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--success);
            position: absolute;
            left: 0;
            top: 8px;
            font-size: 0.85rem;
        }

        /* Sidebar */
        .side-col .side-card {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            margin-bottom: 24px;
            transition: var(--transition);
        }
        .side-col .side-card:hover {
            background: var(--glass-bg-hover);
            box-shadow: var(--shadow-card);
        }
        .side-col .side-card h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .side-col .side-card h4 i { color: var(--brand); }
        .side-col .side-card ul li { margin-bottom: 10px; }
        .side-col .side-card ul li a {
            color: var(--text-muted);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 6px 0;
            transition: var(--transition);
        }
        .side-col .side-card ul li a:hover { color: var(--brand); padding-left: 4px; }
        .side-col .side-card ul li a i { font-size: 0.75rem; color: var(--brand); opacity: 0.6; }
        .side-col .side-card .side-cta {
            display: block;
            text-align: center;
            margin-top: 12px;
        }

        /* ===== Feature Cards (Product Highlights) ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            transition: var(--transition);
        }
        .feature-card:hover {
            background: var(--glass-bg-hover);
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }
        .feature-card .icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(26, 122, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--brand);
            margin-bottom: 18px;
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== Steps / Flow ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            background: var(--glass-bg-hover);
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin: 0 auto 18px;
        }
        .step-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 10px;
        }
        .step-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .step-connector {
            display: none;
        }

        /* ===== FAQ ===== */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px 32px;
        }
        .faq-item {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            transition: var(--transition);
        }
        .faq-item:hover {
            background: var(--glass-bg-hover);
            border-color: rgba(26, 122, 255, 0.2);
        }
        .faq-item h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .faq-item h4 i { color: var(--brand); font-size: 0.9rem; }
        .faq-item p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            padding-left: 28px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 100px 0;
            background: linear-gradient(135deg, var(--primary-dark) 0%, #0f1a2e 50%, var(--primary-light) 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 50% 50%, rgba(26, 122, 255, 0.05) 0%, transparent 50%);
            animation: ctaGlow 8s ease-in-out infinite alternate;
        }
        @keyframes ctaGlow {
            0% { transform: translate(0, 0) scale(1); }
            100% { transform: translate(3%, -3%) scale(1.1); }
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
        }
        .cta-section h2 span { color: var(--brand); }
        .cta-section p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .cta-section .cta-note {
            margin-top: 20px;
            font-size: 0.85rem;
            color: var(--text-muted);
            opacity: 0.7;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            border-top: 1px solid var(--border);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col .site-logo { margin-bottom: 12px; display: inline-block; }
        .footer-col p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .footer-col ul li a { color: var(--text-muted); }
        .footer-col ul li a:hover { color: var(--brand); padding-left: 4px; }
        .social-links { display: flex; gap: 12px; margin-top: 12px; }
        .social-links a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .social-links a:hover {
            border-color: var(--brand);
            background: rgba(26, 122, 255, 0.1);
            color: var(--brand);
            transform: translateY(-2px);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 24px 0;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1024px) {
            .two-col-content { flex-direction: column; }
            .two-col-content .main-col { flex: 0 0 100%; max-width: 100%; }
            .two-col-content .side-col { flex: 0 0 100%; max-width: 100%; }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .faq-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .page-hero h1 { font-size: 2.2rem; }
            .section-title h2 { font-size: 1.75rem; }
        }

        @media screen and (max-width: 768px) {
            .nav-list { display: none; }
            .hamburger { display: flex; }
            .nav-list.open {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(11, 22, 40, 0.98);
                backdrop-filter: blur(20px);
                padding: 24px 32px;
                gap: 16px;
                border-bottom: 1px solid var(--border);
                align-items: stretch;
            }
            .nav-list.open a { padding: 12px 0; font-size: 1.1rem; }
            .nav-list.open .nav-cta { margin-left: 0; margin-top: 8px; }
            .page-hero { padding: 120px 0 60px; min-height: auto; }
            .page-hero h1 { font-size: 1.75rem; }
            .page-hero .hero-sub { font-size: 1rem; }
            .page-hero .hero-bg-img { width: 100%; opacity: 0.08; }
            .page-hero .deco-grid { display: none; }
            .section { padding: 48px 0; }
            .section-title { margin-bottom: 36px; }
            .section-title h2 { font-size: 1.5rem; }
            .feature-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .cta-section { padding: 60px 0; }
            .cta-section h2 { font-size: 1.6rem; }
            .btn-primary, .btn-secondary { padding: 12px 28px; font-size: 1rem; }
            .page-hero .hero-actions { flex-direction: column; align-items: flex-start; }
        }

        @media screen and (max-width: 520px) {
            .container { padding: 0 16px; }
            .page-hero h1 { font-size: 1.5rem; }
            .main-col .content-block h3 { font-size: 1.2rem; }
            .faq-item { padding: 18px 20px; }
            .faq-item h4 { font-size: 0.95rem; }
            .side-col .side-card { padding: 20px 18px; }
            .feature-card { padding: 24px 20px; }
            .step-card { padding: 24px 18px; }
        }

        /* ===== Accessibility ===== */
        a:focus-visible, button:focus-visible, .btn-primary:focus-visible, .btn-secondary:focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 3px;
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 16px; }
        .mt-2 { margin-top: 32px; }
        .mb-1 { margin-bottom: 16px; }
        .mb-2 { margin-bottom: 32px; }
        .gap-1 { gap: 16px; }
        .gap-2 { gap: 32px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }

        /* Glow line decoration */
        .glow-line {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--brand), var(--accent));
            border-radius: 3px;
            margin: 0 auto 16px;
        }

        /* Image placeholder style */
        .img-placeholder {
            background: linear-gradient(135deg, rgba(26,122,255,0.08), rgba(124,58,237,0.08));
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
        }

        /* Tag / Badge */
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(26, 122, 255, 0.12);
            color: var(--brand);
            border: 1px solid rgba(26, 122, 255, 0.15);
        }
        .tag-success { background: rgba(16, 185, 129, 0.12); color: var(--success); border-color: rgba(16, 185, 129, 0.15); }
        .tag-warning { background: rgba(245, 158, 11, 0.12); color: var(--warning); border-color: rgba(245, 158, 11, 0.15); }
        .tag-accent { background: rgba(124, 58, 237, 0.12); color: var(--accent); border-color: rgba(124, 58, 237, 0.15); }