/* roulang page: index */
:root {
            --primary: #1e3a5f;
            --primary-dark: #14293f;
            --primary-light: #2d4a7a;
            --accent: #d4a853;
            --accent-dark: #b8923a;
            --accent-light: rgba(212, 168, 83, 0.15);
            --bg: #f4f6fb;
            --bg-white: #ffffff;
            --text: #161b2b;
            --text-weak: #5a6478;
            --text-weakest: #98a2b3;
            --border: #e2e6ee;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.04);
            --shadow: 0 6px 30px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        button { cursor: pointer; border: none; background: none; font-family: inherit; }
        input, textarea { font-family: inherit; }
        ul { list-style: none; }

        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        /* ===== Header ===== */
        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 1px 8px rgba(15, 23, 42, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 78px;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .header-nav-left,
        .header-nav-right {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
        }
        .header-nav-right { justify-content: flex-end; }
        .header-logo {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 16px;
            flex-shrink: 0;
        }
        .header-logo a {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .header-logo .logo-dot {
            width: 10px; height: 10px;
            border-radius: 3px;
            background: var(--accent);
            display: inline-block;
        }
        .header-logo a span.c { color: var(--accent); }
        .nav-link {
            padding: 9px 20px;
            border-radius: 10px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-weak);
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(30, 58, 95, 0.05);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 700;
            background: rgba(30, 58, 95, 0.07);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 22px;
            height: 3px;
            border-radius: 3px;
            background: var(--accent);
        }
        .nav-cta-btn {
            padding: 8px 20px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .nav-cta-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(30, 58, 95, 0.3);
        }
        .mobile-toggle {
            display: none;
            width: 42px; height: 42px;
            border-radius: 10px;
            background: rgba(30, 58, 95, 0.05);
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary);
        }
        .mobile-menu {
            display: none;
            background: var(--bg-white);
            border-top: 1px solid var(--border);
            padding: 8px 24px 16px;
            position: absolute;
            top: 78px;
            left: 0;
            right: 0;
            z-index: 999;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
        }
        .mobile-menu.show { display: block; }
        .mobile-menu a {
            display: block;
            padding: 14px 8px;
            border-bottom: 1px solid var(--border);
            font-weight: 500;
            font-size: 1rem;
            color: var(--text);
        }
        .mobile-menu a:last-child { border-bottom: none; }
        .mobile-menu a.active { color: var(--primary); font-weight: 700; }
        .mobile-menu .mobile-cta {
            margin-top: 12px;
            padding: 12px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            text-align: center;
            font-weight: 600;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 130px 0 150px;
            color: #fff;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(20, 41, 63, 0.92) 0%, rgba(30, 58, 95, 0.82) 45%, rgba(20, 41, 63, 0.65) 100%);
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -50px;
            right: -50px;
            width: 300px; height: 300px;
            background: radial-gradient(circle, rgba(212, 168, 83, 0.25) 0%, transparent 70%);
            border-radius: 50%;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.25);
            backdrop-filter: blur(8px);
            padding: 7px 18px;
            border-radius: 100px;
            font-size: 0.85rem;
            color: #e8ecf1;
            margin-bottom: 28px;
            letter-spacing: 0.3px;
        }
        .hero-badge i { color: var(--accent); font-size: 0.8rem; }
        .hero h1 {
            font-size: clamp(2.4rem, 5vw, 3.8rem);
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }
        .hero h1 .highlight {
            color: var(--accent);
            position: relative;
        }
        .hero-desc {
            font-size: 1.08rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.75;
            margin-bottom: 36px;
            max-width: 560px;
        }
        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 48px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: none;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: 0 4px 20px rgba(212, 168, 83, 0.3);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(212, 168, 83, 0.4);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex;
            gap: 48px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            padding-top: 28px;
        }
        .hero-stat { text-align: left; }
        .hero-stat .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 4px;
        }

        /* ===== Section ===== */
        .section { padding: 100px 0; }
        .section-alt { background: var(--bg-white); }
        .section-head {
            text-align: center;
            max-width: 660px;
            margin: 0 auto 56px;
        }
        .section-tag {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent-dark);
            padding: 5px 16px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .section-head h2 {
            font-size: clamp(1.9rem, 3.5vw, 2.6rem);
            font-weight: 800;
            color: var(--text);
            line-height: 1.25;
            margin-bottom: 14px;
        }
        .section-head p {
            font-size: 1rem;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ===== Feature Cards ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            text-align: center;
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(212, 168, 83, 0.35);
        }
        .feature-icon {
            width: 68px;
            height: 68px;
            border-radius: 18px;
            background: linear-gradient(135deg, rgba(30, 58, 95, 0.06) 0%, rgba(212, 168, 83, 0.12) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 22px;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            transform: scale(1.08);
            background: linear-gradient(135deg, rgba(30, 58, 95, 0.1) 0%, rgba(212, 168, 83, 0.2) 100%);
        }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.65;
        }

        /* ===== Category Cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(212, 168, 83, 0.4);
        }
        .category-card .cover {
            position: relative;
            height: 180px;
            overflow: hidden;
        }
        .category-card .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .category-card:hover .cover img {
            transform: scale(1.05);
        }
        .category-card .cover-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(20, 41, 63, 0.5), transparent);
        }
        .category-card .body {
            padding: 24px 26px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card .tag {
            display: inline-flex;
            align-self: flex-start;
            background: var(--accent-light);
            color: var(--accent-dark);
            padding: 3px 12px;
            border-radius: 100px;
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .category-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .category-card p {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.6;
            flex: 1;
        }
        .category-card .link-more {
            margin-top: 18px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .category-card .link-more i {
            transition: transform 0.3s ease;
            font-size: 0.8rem;
        }
        .category-card:hover .link-more i {
            transform: translateX(4px);
        }

        /* ===== Latest Posts ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .post-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(212, 168, 83, 0.3);
        }
        .post-card .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-weakest);
        }
        .post-card .post-meta .cat {
            background: var(--accent-light);
            color: var(--accent-dark);
            padding: 2px 10px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.75rem;
        }
        .post-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.5;
            color: var(--text);
            margin: 0;
        }
        .post-card h3 a:hover { color: var(--primary); }
        .post-card p {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card .post-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: auto;
            padding-top: 6px;
            border-top: 1px solid var(--border);
            font-size: 0.8rem;
            color: var(--text-weakest);
        }
        .post-empty {
            text-align: center;
            padding: 48px 24px;
            background: var(--bg-white);
            border: 1px dashed var(--border);
            border-radius: var(--radius-lg);
            color: var(--text-weak);
            font-size: 1rem;
        }

        /* ===== Stats ===== */
        .stats-section {
            position: relative;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 90px 0;
            color: #fff;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(20, 41, 63, 0.94), rgba(30, 58, 95, 0.88));
        }
        .stats-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            text-align: center;
        }
        .stat-item .icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 14px;
        }
        .stat-item .num {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            background: linear-gradient(135deg, #fff, #e0e7ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .stat-item .label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
        }

        /* ===== Process ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
        }
        .process-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(to right, var(--accent), var(--border), var(--border), var(--accent));
            z-index: 0;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .process-step .num {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: var(--bg-white);
            border: 2px solid var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            margin: 0 auto 20px;
            box-shadow: 0 6px 20px rgba(212, 168, 83, 0.2);
            transition: var(--transition);
        }
        .process-step:hover .num {
            transform: scale(1.1);
            background: var(--primary);
            color: #fff;
        }
        .process-step h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.88rem;
            color: var(--text-weak);
            line-height: 1.6;
            max-width: 200px;
            margin: 0 auto;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(212, 168, 83, 0.4);
            box-shadow: var(--shadow-sm);
        }
        .faq-item.active {
            border-color: var(--accent);
            box-shadow: var(--shadow);
        }
        .faq-question {
            padding: 22px 26px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
        }
        .faq-question i {
            color: var(--accent);
            transition: transform 0.3s;
            font-size: 0.9rem;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 26px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
        }
        .faq-item.active .faq-answer {
            padding: 0 26px 22px;
            max-height: 300px;
        }
        .faq-answer p {
            font-size: 0.92rem;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            padding: 100px 0;
            color: #fff;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(20, 41, 63, 0.92), rgba(30, 58, 95, 0.85));
        }
        .cta-content {
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            font-weight: 800;
            margin-bottom: 18px;
        }
        .cta-content p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .cta-content .btn {
            margin: 4px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }
        .footer-inner {
            display: flex;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand { max-width: 320px; }
        .footer-brand .logo-text {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand .logo-dot {
            width: 8px; height: 8px;
            border-radius: 2px;
            background: var(--accent);
            display: inline-block;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-links h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .footer-links ul li {
            margin-bottom: 10px;
        }
        .footer-links ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .footer-links ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .process-grid::before { display: none; }
            .stats-inner {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .header-nav-left .nav-link,
            .header-nav-right .nav-link {
                padding: 8px 14px;
                font-size: 0.9rem;
            }
        }
        @media (max-width: 768px) {
            .header-nav-left,
            .header-nav-right {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .header-logo {
                order: -1;
                margin-right: auto;
                padding: 0;
            }
            .hero {
                padding: 90px 0 100px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat .num {
                font-size: 1.5rem;
            }
            .section {
                padding: 68px 0;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .posts-grid {
                grid-template-columns: 1fr;
            }
            .stats-inner {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .process-step p {
                max-width: 260px;
            }
            .footer-inner {
                flex-direction: column;
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .header-logo a {
                font-size: 1.1rem;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .hero-btns {
                flex-direction: column;
            }
            .btn {
                justify-content: center;
                width: 100%;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .section-head h2 {
                font-size: 1.6rem;
            }
            .stats-inner {
                grid-template-columns: 1fr;
            }
            .stat-item .num {
                font-size: 2rem;
            }
            .category-card .cover {
                height: 140px;
            }
            .post-card {
                padding: 20px;
            }
            .faq-question {
                padding: 18px 20px;
                font-size: 0.95rem;
            }
            .faq-answer p {
                font-size: 0.88rem;
            }
        }

/* roulang page: article */
:root {
            --primary: #162447;
            --primary-dark: #0d1b2a;
            --primary-light: #2d3e58;
            --accent: #f5a623;
            --accent-hover: #e08e00;
            --accent-light: #fff4e0;
            --bg: #f4f6fb;
            --card-bg: #ffffff;
            --text: #1a2437;
            --text-muted: #6b7280;
            --border: #e5e9f0;
            --radius: 14px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(13, 27, 42, 0.08);
            --shadow-lg: 0 12px 40px rgba(13, 27, 42, 0.14);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 16px rgba(13, 27, 42, 0.06);
        }

        .header-inner {
            max-width: 1280px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.85rem 1.5rem;
            position: relative;
            min-height: 70px;
        }

        .header-logo {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            text-align: center;
        }

        .header-logo a {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .header-logo .c {
            color: var(--accent);
        }

        .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), #f7c46a);
            display: inline-block;
            box-shadow: 0 2px 8px rgba(245, 166, 35, 0.45);
            flex-shrink: 0;
        }

        .header-nav-left,
        .header-nav-right {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            z-index: 2;
        }

        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: #4a5568;
            padding: 0.5rem 1rem;
            border-radius: 8px;
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(22, 36, 71, 0.05);
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 700;
            background: rgba(22, 36, 71, 0.06);
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            padding: 0.55rem 1.25rem;
            border-radius: 50px;
            box-shadow: 0 4px 14px rgba(22, 36, 71, 0.25);
            transition: var(--transition);
        }

        .nav-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 22px rgba(22, 36, 71, 0.35);
        }

        .mobile-toggle {
            display: none;
            font-size: 1.25rem;
            color: var(--primary);
            background: none;
            cursor: pointer;
            padding: 0.5rem;
            border-radius: 8px;
            transition: var(--transition);
        }

        .mobile-toggle:hover {
            background: rgba(22, 36, 71, 0.05);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            padding: 1rem 1.5rem 1.5rem;
            background: #fff;
            border-top: 1px solid var(--border);
            gap: 0.4rem;
        }

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

        .mobile-menu a {
            padding: 0.7rem 1rem;
            border-radius: 10px;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: rgba(22, 36, 71, 0.06);
            color: var(--primary);
        }

        .mobile-menu .mobile-cta {
            margin-top: 0.5rem;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            text-align: center;
            font-weight: 600;
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            padding: 4.5rem 0 3.5rem;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 27, 42, 0.92), rgba(22, 36, 71, 0.78));
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 1.25rem;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
            transition: var(--transition);
        }

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

        .breadcrumb .sep {
            opacity: 0.5;
        }

        .breadcrumb .current {
            color: #fff;
            font-weight: 500;
            max-width: 220px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .hero-content .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: var(--accent);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.35rem 1rem;
            border-radius: 50px;
            margin-bottom: 0.85rem;
        }

        .hero-title {
            font-size: clamp(1.8rem, 3.5vw, 2.5rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.35;
            margin-bottom: 1rem;
            letter-spacing: 0.01em;
        }

        .hero-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 1.4rem;
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.9rem;
        }

        .hero-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        .hero-meta i {
            color: var(--accent);
        }

        /* ===== Article Section ===== */
        .article-section {
            padding: 3rem 0 1.5rem;
        }

        .article-container {
            max-width: 860px;
            margin: 0 auto;
        }

        .article-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: clamp(1.5rem, 4vw, 2.75rem);
            border: 1px solid var(--border);
        }

        .article-summary {
            background: linear-gradient(135deg, var(--accent-light), #fff8ef);
            border-left: 4px solid var(--accent);
            border-radius: 12px;
            padding: 1.25rem 1.5rem;
            margin-bottom: 2rem;
            font-size: 1rem;
            color: #5b4632;
            line-height: 1.8;
        }

        .article-body {
            font-size: 1rem;
            color: #2d3748;
            line-height: 1.9;
        }

        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text);
            margin: 2.25rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border);
        }

        .article-body h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--text);
            margin: 1.75rem 0 0.75rem;
        }

        .article-body p {
            margin-bottom: 1.35rem;
            line-height: 1.9;
        }

        .article-body img {
            border-radius: 14px;
            box-shadow: var(--shadow);
            margin: 1.75rem auto;
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 1.5rem 1.5rem;
        }

        .article-body ul li,
        .article-body ol li {
            margin-bottom: 0.5rem;
            line-height: 1.8;
        }

        .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: #f8f9fc;
            padding: 1rem 1.5rem;
            border-radius: 10px;
            margin: 1.75rem 0;
            color: #4a5568;
            font-style: italic;
        }

        .article-body a {
            color: var(--primary);
            font-weight: 600;
            border-bottom: 1px dashed rgba(22, 36, 71, 0.3);
        }

        .article-body a:hover {
            color: var(--accent-hover);
            border-color: var(--accent);
        }

        .article-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border);
        }

        .btn-back,
        .btn-outline-sm {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            font-weight: 600;
            padding: 0.6rem 1.25rem;
            border-radius: 50px;
            transition: var(--transition);
        }

        .btn-back {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(22, 36, 71, 0.2);
        }

        .btn-back:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(22, 36, 71, 0.3);
        }

        .btn-outline-sm {
            border: 2px solid var(--primary);
            color: var(--primary);
        }

        .btn-outline-sm:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ===== Not Found ===== */
        .not-found-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 4rem 2rem;
            text-align: center;
            border: 1px solid var(--border);
        }

        .not-found-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 1.5rem;
            border-radius: 50%;
            background: var(--accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--accent);
        }

        .not-found-card h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text);
        }

        .not-found-card p {
            color: var(--text-muted);
            margin-bottom: 1.75rem;
            max-width: 320px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            box-shadow: 0 6px 20px rgba(245, 166, 35, 0.35);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(245, 166, 35, 0.45);
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 3.5rem 0;
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .section-header {
            text-align: center;
            max-width: 600px;
            margin: 0 auto 2.5rem;
        }

        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.12em;
            background: var(--accent-light);
            padding: 0.3rem 1rem;
            border-radius: 50px;
            margin-bottom: 0.75rem;
        }

        .section-header h2 {
            font-size: clamp(1.6rem, 2.5vw, 2rem);
            font-weight: 800;
            color: var(--text);
            margin-bottom: 0.5rem;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.75rem;
        }

        .related-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(13, 27, 42, 0.05);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(245, 166, 35, 0.35);
        }

        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .related-card .card-body {
            padding: 1.4rem 1.5rem 1.5rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .related-card .tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-light);
            padding: 0.25rem 0.75rem;
            border-radius: 50px;
            margin-bottom: 0.6rem;
            align-self: flex-start;
        }

        .related-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 0.5rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1rem;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        .related-card:hover .card-link {
            color: var(--accent-hover);
            gap: 0.7rem;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 4rem 0;
            position: relative;
            background-size: cover;
            background-position: center;
        }

        .cta-inner {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 28px;
            padding: 3.5rem 2.5rem;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
            box-shadow: 0 16px 48px rgba(13, 27, 42, 0.3);
        }

        .cta-inner::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(245, 166, 35, 0.12);
        }

        .cta-inner::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -40px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(245, 166, 35, 0.08);
        }

        .cta-inner h2 {
            font-size: clamp(1.6rem, 3vw, 2.1rem);
            font-weight: 800;
            margin-bottom: 0.75rem;
            position: relative;
            z-index: 1;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 520px;
            margin: 0 auto 1.75rem;
            font-size: 1rem;
            position: relative;
            z-index: 1;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .cta-buttons .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: 0 6px 24px rgba(245, 166, 35, 0.4);
        }

        .cta-buttons .btn-primary:hover {
            box-shadow: 0 10px 32px rgba(245, 166, 35, 0.55);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 0.75rem 1.8rem;
            border-radius: 50px;
            transition: var(--transition);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(245, 166, 35, 0.1);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 3.5rem 0 0;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo-text {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 260px;
        }

        .footer-links h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }

        .footer-links ul {
            list-style: none;
            padding: 0;
        }

        .footer-links ul li {
            margin-bottom: 0.65rem;
        }

        .footer-links ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }

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

        .footer-bottom {
            padding: 1.5rem 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .header-inner {
                padding: 0.75rem 1.25rem;
            }

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

            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }

        @media (max-width: 768px) {
            .header-nav-left,
            .header-nav-right {
                display: none;
            }

            .header-inner {
                justify-content: space-between;
                min-height: 60px;
            }

            .header-logo {
                position: static;
                transform: none;
                margin-right: auto;
            }

            .header-logo a {
                font-size: 1.15rem;
            }

            .mobile-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .page-hero {
                min-height: 280px;
                padding: 3rem 0 2.5rem;
            }

            .article-card {
                padding: 1.5rem;
            }

            .article-summary {
                padding: 1rem 1.25rem;
            }

            .cta-inner {
                padding: 2.5rem 1.5rem;
                border-radius: 20px;
            }

            .cta-buttons {
                flex-direction: column;
            }

            .cta-buttons .btn-primary,
            .cta-buttons .btn-outline {
                width: 100%;
                justify-content: center;
            }

            .related-grid {
                grid-template-columns: 1fr;
                max-width: 420px;
                margin: 0 auto;
            }
        }

        @media (max-width: 520px) {
            .header-logo a {
                font-size: 1.05rem;
            }

            .header-inner {
                padding: 0.6rem 1rem;
            }

            .hero-title {
                font-size: 1.5rem;
            }

            .hero-meta {
                gap: 0.8rem;
                font-size: 0.8rem;
            }

            .article-card {
                padding: 1.25rem;
            }

            .article-body {
                font-size: 0.95rem;
            }

            .article-body h2 {
                font-size: 1.35rem;
            }

            .article-body h3 {
                font-size: 1.15rem;
            }

            .article-footer {
                flex-direction: column;
                align-items: stretch;
            }

            .article-footer .btn-back,
            .article-footer .btn-outline-sm {
                justify-content: center;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 1.75rem;
            }

            .cta-inner h2 {
                font-size: 1.4rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0e7490;
            --primary-dark: #0f3a4e;
            --secondary: #06b6d4;
            --dark: #0f172a;
            --darker: #020617;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #1e293b;
            --muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
            --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
            --shadow-lg: 0 18px 40px rgba(15, 23, 42, .10);
            --transition: .25s ease;
            --font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 999;
            background: rgba(255, 255, 255, .88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            position: relative;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
            height: 74px;
            display: grid;
            grid-template-columns: minmax(160px, 1fr) auto minmax(160px, 1fr);
            align-items: center;
            gap: 12px;
        }

        .header-nav-left {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .header-nav-right {
            display: flex;
            align-items: center;
            justify-content: flex-end;
            gap: 10px;
        }

        .header-logo {
            text-align: center;
        }

        .header-logo a {
            display: inline-flex;
            align-items: center;
            font-size: 22px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: .2px;
            transition: color var(--transition);
        }

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

        .header-logo .c {
            color: var(--primary);
            font-weight: 900;
            margin-left: 2px;
        }

        .logo-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            margin-right: 8px;
            box-shadow: 0 0 0 4px rgba(6, 182, 212, .12);
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--muted);
            border: 1px solid transparent;
            transition: color var(--transition), background var(--transition), border-color var(--transition);
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(14, 116, 144, .06);
        }

        .nav-link.active {
            color: var(--primary);
            background: rgba(14, 116, 144, .10);
            border-color: rgba(14, 116, 144, .16);
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            padding: 9px 18px;
            border-radius: 999px;
            box-shadow: 0 6px 16px rgba(14, 116, 144, .24);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .nav-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(14, 116, 144, .30);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--dark);
            width: 44px;
            height: 44px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            transition: background var(--transition);
        }

        .mobile-toggle:hover {
            background: rgba(15, 23, 42, .06);
        }

        .mobile-menu {
            display: none;
            position: absolute;
            top: 64px;
            left: 0;
            right: 0;
            background: #fff;
            padding: 16px 24px 20px;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            flex-direction: column;
            gap: 8px;
        }

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

        .mobile-menu a {
            padding: 12px 14px;
            border-radius: 10px;
            font-weight: 600;
            color: var(--text);
            transition: background var(--transition), color var(--transition);
        }

        .mobile-menu a:hover {
            background: rgba(14, 116, 144, .06);
            color: var(--primary);
        }

        .mobile-menu a.active {
            background: rgba(14, 116, 144, .10);
            color: var(--primary);
        }

        .mobile-menu .mobile-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            text-align: center;
            font-weight: 700;
            border-radius: 999px;
            margin-top: 4px;
        }

        /* ===== Buttons ===== */
        .btn-primary,
        .btn-secondary,
        .btn-white {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 700;
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 8px 20px rgba(14, 116, 144, .28);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(14, 116, 144, .34);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .25);
            color: #fff;
            backdrop-filter: blur(4px);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, .2);
            transform: translateY(-3px);
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 24px rgba(0, 0, 0, .18);
        }

        .btn-white:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 30px rgba(0, 0, 0, .22);
        }

        /* ===== Hero ===== */
        .guide-hero {
            position: relative;
            padding: 96px 0;
            background-color: var(--dark);
            color: #fff;
            overflow: hidden;
        }

        .guide-hero .bg-layer {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: .35;
        }

        .guide-hero .bg-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(2, 6, 23, .92) 0%, rgba(15, 23, 42, .75) 45%, rgba(14, 116, 144, .55) 100%);
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(6, 182, 212, .15);
            border: 1px solid rgba(6, 182, 212, .3);
            color: #a5f3fc;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
        }

        .guide-hero h1 {
            font-size: 52px;
            line-height: 1.15;
            font-weight: 900;
            margin: 20px 0 20px;
            letter-spacing: 1px;
        }

        .guide-hero p {
            font-size: 18px;
            max-width: 680px;
            color: rgba(255, 255, 255, .85);
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            margin-top: 34px;
            flex-wrap: wrap;
        }

        /* ===== Sections ===== */
        .section {
            padding: 80px 0;
        }

        .section-head {
            max-width: 720px;
            margin: 0 auto 48px;
            text-align: center;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(14, 116, 144, .08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
        }

        .section-title {
            font-size: 34px;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.3;
            margin-top: 14px;
        }

        .section-desc {
            margin-top: 12px;
            color: var(--muted);
            font-size: 16px;
        }

        /* ===== About ===== */
        .about-grid {
            display: grid;
            grid-template-columns: 1.05fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .about-media {
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .about-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, .28), transparent 55%);
        }

        .about-content .section-label {
            margin-bottom: 12px;
        }

        .about-content h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .about-content p {
            color: var(--muted);
            line-height: 1.85;
            margin-bottom: 10px;
        }

        .check-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 22px;
        }

        .check-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 14px 16px;
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .check-list li:hover {
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }

        .check-list li i {
            color: var(--primary);
            margin-top: 4px;
            font-size: 15px;
        }

        .check-list strong {
            color: var(--dark);
            display: block;
            font-size: 15px;
        }

        .check-list span {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.6;
        }

        /* ===== Steps ===== */
        .steps-section {
            background: var(--dark);
            position: relative;
            overflow: hidden;
        }

        .steps-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: .12;
        }

        .steps-section .container {
            position: relative;
            z-index: 2;
        }

        .steps-section .section-title {
            color: #fff;
        }

        .steps-section .section-desc {
            color: rgba(255, 255, 255, .65);
        }

        .steps-section .section-label {
            background: rgba(6, 182, 212, .12);
            color: #67e8f9;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-card {
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: 20px;
            padding: 28px 24px;
            position: relative;
            transition: background var(--transition), transform var(--transition), border-color var(--transition);
        }

        .step-card:hover {
            background: rgba(255, 255, 255, .09);
            transform: translateY(-5px);
            border-color: rgba(6, 182, 212, .35);
        }

        .step-num {
            font-size: 44px;
            font-weight: 900;
            line-height: 1;
            font-style: italic;
            background: linear-gradient(135deg, #22d3ee, #0e7490);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            display: inline-block;
        }

        .step-card h3 {
            color: #fff;
            font-size: 17px;
            font-weight: 700;
            margin: 16px 0 10px;
            line-height: 1.4;
        }

        .step-card p {
            color: rgba(255, 255, 255, .6);
            font-size: 14px;
            line-height: 1.75;
        }

        /* ===== Entries ===== */
        .entries-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .entry-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .entry-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .entry-thumb {
            height: 180px;
            position: relative;
            overflow: hidden;
        }

        .entry-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .entry-card:hover .entry-thumb img {
            transform: scale(1.05);
        }

        .entry-thumb::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, .35), transparent 60%);
        }

        .entry-body {
            padding: 26px;
        }

        .entry-body h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .entry-body p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.75;
        }

        .entry-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
            margin-top: 14px;
            transition: gap var(--transition);
        }

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

        /* ===== Articles ===== */
        .content-section {
            background: #eef2f7;
        }

        .article-card {
            background: var(--surface);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .article-cover {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .article-card:hover .article-cover img {
            transform: scale(1.05);
        }

        .article-body {
            padding: 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-tag {
            display: inline-flex;
            align-self: flex-start;
            padding: 4px 12px;
            border-radius: 999px;
            background: rgba(14, 116, 144, .08);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            letter-spacing: .5px;
        }

        .article-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--dark);
            line-height: 1.5;
            margin-top: 14px;
        }

        .article-body p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.75;
            margin-top: 10px;
            flex: 1;
        }

        /* ===== Security ===== */
        .security-section {
            background: linear-gradient(135deg, #f0fdfa, #e2e8f0);
        }

        .security-card {
            max-width: 900px;
            margin: 0 auto;
            background: var(--surface);
            border-radius: 24px;
            padding: 48px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
        }

        .security-card .section-label {
            margin-bottom: 12px;
        }

        .security-card h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.35;
            margin-bottom: 12px;
        }

        .security-card>p {
            color: var(--muted);
            line-height: 1.8;
            max-width: 640px;
        }

        .security-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 14px;
            margin-top: 28px;
        }

        .security-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 18px;
            background: #f8fafc;
            border: 1px solid var(--border);
            border-radius: 12px;
            font-weight: 600;
            color: var(--dark);
            font-size: 14px;
            transition: box-shadow var(--transition), border-color var(--transition);
        }

        .security-list li:hover {
            box-shadow: var(--shadow-sm);
            border-color: rgba(14, 116, 144, .25);
        }

        .security-list li i {
            color: var(--primary);
            font-size: 16px;
            width: 20px;
            text-align: center;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: #fff;
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #f8fafc;
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 20px 24px;
            transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .faq-item[open] {
            background: #fff;
            border-color: rgba(14, 116, 144, .3);
            box-shadow: var(--shadow-sm);
        }

        .faq-item summary {
            cursor: pointer;
            font-weight: 700;
            color: var(--dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 16px;
            line-height: 1.5;
            list-style: none;
        }

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

        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 14px;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
            margin-left: 12px;
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-item p {
            margin-top: 14px;
            color: var(--muted);
            line-height: 1.85;
            font-size: 15px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--bg);
        }

        .cta-box {
            position: relative;
            border-radius: 28px;
            padding: 64px;
            text-align: center;
            color: #fff;
            background-size: cover;
            background-position: center;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-box::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(2, 6, 23, .88), rgba(14, 116, 144, .82));
        }

        .cta-box>* {
            position: relative;
            z-index: 1;
        }

        .cta-box h2 {
            font-size: 34px;
            font-weight: 900;
            line-height: 1.3;
        }

        .cta-box p {
            margin-top: 14px;
            font-size: 16px;
            color: rgba(255, 255, 255, .85);
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-box .btn-white {
            margin-top: 28px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0b1120;
            color: #8ea0b5;
            padding-top: 60px;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 44px;
        }

        .footer-brand .logo-text {
            display: flex;
            align-items: center;
            color: #fff;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: .2px;
        }

        .footer-brand .logo-text .logo-dot {
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            box-shadow: 0 0 0 4px rgba(6, 182, 212, .15);
        }

        .footer-brand p {
            margin-top: 14px;
            line-height: 1.8;
            font-size: 14px;
            max-width: 340px;
        }

        .footer-links h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: .5px;
        }

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

        .footer-links a {
            font-size: 14px;
            transition: color var(--transition);
        }

        .footer-links a:hover {
            color: #22d3ee;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            border-top: 1px solid rgba(255, 255, 255, .08);
            font-size: 13px;
            color: #64748b;
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .header-inner {
                display: flex;
                justify-content: space-between;
                align-items: center;
                height: 64px;
                padding: 0 20px;
            }
            .header-nav-left,
            .header-nav-right {
                display: none;
            }
            .header-logo {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
            }
            .mobile-toggle {
                display: flex;
                margin-left: auto;
            }
            .mobile-menu {
                top: 64px;
            }
            .guide-hero {
                padding: 72px 0;
            }
            .guide-hero h1 {
                font-size: 40px;
            }
            .about-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .entries-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 767px) {
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 28px;
            }
            .section-head {
                margin-bottom: 34px;
            }
            .guide-hero h1 {
                font-size: 32px;
            }
            .guide-hero p {
                font-size: 15px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
            }
            .about-content h2 {
                font-size: 26px;
            }
            .security-card {
                padding: 32px 24px;
            }
            .security-card h2 {
                font-size: 24px;
            }
            .security-list {
                grid-template-columns: 1fr;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 26px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                height: 60px;
                padding: 0 16px;
            }
            .header-logo a {
                font-size: 17px;
            }
            .mobile-menu {
                top: 60px;
                padding: 14px 16px 18px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .guide-hero {
                padding: 56px 0;
            }
            .guide-hero h1 {
                font-size: 27px;
                letter-spacing: .5px;
            }
            .guide-hero p {
                font-size: 14px;
            }
            .steps-grid,
            .entries-grid {
                grid-template-columns: 1fr;
            }
            .step-card {
                padding: 22px 20px;
            }
            .article-cover {
                height: 150px;
            }
            .article-body h3 {
                font-size: 16px;
            }
            .cta-box {
                border-radius: 20px;
                padding: 32px 20px;
            }
            .cta-box h2 {
                font-size: 23px;
            }
        }