/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a4b8c;
            --primary-light: #2a6bc4;
            --primary-dark: #0f2d5a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg-body: #f0f4f8;
            --bg-card: #ffffff;
            --bg-dark: #0f1a2e;
            --bg-section-alt: #e8eef5;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-light: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 32px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-xl: 0 24px 64px rgba(0,0,0,0.18);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *, *::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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
        h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); margin-bottom: 0.5em; }
        h3 { font-size: clamp(1.1rem, 2.5vw, 1.4rem); }
        p { margin-bottom: 1em; color: var(--text-secondary); }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-section-alt); }
        .section-dark { background: var(--bg-dark); color: var(--text-light); }
        .section-dark h2, .section-dark h3, .section-dark p { color: var(--text-light); }
        .text-center { text-align: center; }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--accent);
            background: rgba(245, 158, 11, 0.12);
            padding: 4px 16px;
            border-radius: 50px;
            margin-bottom: 12px;
        }
        .section-title { margin-bottom: 16px; }
        .section-subtitle { font-size: 1.1rem; color: var(--text-muted); max-width: 640px; margin: 0 auto 40px; }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 75, 140, 0.3);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(26, 75, 140, 0.3); }
        .btn-accent {
            background: var(--accent);
            color: #1e293b;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            color: #1e293b;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-lg { padding: 16px 44px; font-size: 1.05rem; }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-img { width: 100%; height: 200px; object-fit: cover; }
        .card-body { padding: 24px; }
        .card-title { font-size: 1.15rem; margin-bottom: 8px; }
        .card-text { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.6; }
        .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 50px;
            background: rgba(26, 75, 140, 0.08);
            color: var(--primary);
            margin-bottom: 8px;
        }

        /* ===== 徽章 / 标签 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
        }
        .badge-hot { background: #fee2e2; color: #dc2626; }
        .badge-new { background: #dbeafe; color: #2563eb; }
        .badge-tip { background: #fef3c7; color: #d97706; }
        .badge-safe { background: #d1fae5; color: #059669; }

        /* ===== 网格 ===== */
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            height: var(--header-height);
            transition: var(--transition);
        }
        .header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.5px;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
        }
        .logo span { color: var(--accent); }
        .nav { display: flex; align-items: center; gap: 8px; }
        .nav a {
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav a:hover { color: var(--primary); background: rgba(26, 75, 140, 0.06); }
        .nav a.active {
            color: #fff;
            background: var(--primary);
        }
        .nav a.active:hover { color: #fff; background: var(--primary-light); }
        .nav-cta {
            margin-left: 12px;
            padding: 8px 24px;
            border-radius: 50px;
            background: var(--accent);
            color: #1e293b;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .nav-cta:hover { background: var(--accent-light); color: #1e293b; transform: translateY(-1px); }
        .hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; }
        .hamburger span { display: block; width: 26px; height: 2.5px; background: var(--text-primary); border-radius: 4px; transition: var(--transition); }

        /* ===== Hero ===== */
        .hero {
            min-height: 92vh;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(135deg, #0f1a2e 0%, #1a3a6e 60%, #1a4b8c 100%);
            overflow: hidden;
            margin-top: var(--header-height);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }
        .hero-pattern {
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 20% 50%, rgba(245,158,11,0.08) 0%, transparent 50%),
                        radial-gradient(circle at 80% 30%, rgba(255,255,255,0.04) 0%, transparent 50%);
        }
        .hero-content { position: relative; z-index: 2; max-width: 720px; padding: 60px 0; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(245,158,11,0.15);
            color: var(--accent-light);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(245,158,11,0.2);
        }
        .hero h1 { color: #fff; font-size: clamp(2.2rem, 6vw, 3.8rem); line-height: 1.15; margin-bottom: 20px; }
        .hero h1 span { color: var(--accent); }
        .hero p { color: rgba(255,255,255,0.75); font-size: 1.15rem; max-width: 560px; margin-bottom: 36px; line-height: 1.7; }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-stats {
            display: flex;
            gap: 48px;
            margin-top: 48px;
            padding-top: 36px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .hero-stat h3 { color: #fff; font-size: 1.8rem; font-weight: 800; }
        .hero-stat h3 small { font-size: 0.9rem; font-weight: 400; color: var(--accent); }
        .hero-stat p { color: rgba(255,255,255,0.5); font-size: 0.85rem; margin-bottom: 0; }

        /* ===== 平台简介 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .intro-image img { width: 100%; height: 420px; object-fit: cover; }
        .intro-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15,26,46,0.4), transparent);
        }
        .intro-features { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 28px; }
        .intro-feat {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
        }
        .intro-feat i { color: var(--accent); font-size: 1.1rem; width: 24px; }
        .intro-feat span { font-size: 0.92rem; font-weight: 500; }

        /* ===== 核心优势 ===== */
        .advantages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .advantage-card {
            text-align: center;
            padding: 36px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .advantage-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .advantage-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
        }
        .advantage-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .advantage-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== 分类入口 ===== */
        .category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border);
            transition: var(--transition);
            cursor: pointer;
        }
        .category-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .category-card img { width: 100%; height: 200px; object-fit: cover; }
        .category-card-body { padding: 20px 24px 24px; }
        .category-card .badge { margin-bottom: 8px; }
        .category-card h3 { font-size: 1.1rem; margin-bottom: 6px; }
        .category-card p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0; }
        .category-card .arrow {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            margin-top: 12px;
            transition: var(--transition);
        }
        .category-card:hover .arrow { gap: 10px; }

        /* ===== 最新资讯 ===== */
        .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .news-card { background: var(--bg-card); border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--border); transition: var(--transition); }
        .news-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .news-card img { width: 100%; height: 180px; object-fit: cover; }
        .news-card-body { padding: 20px 24px 24px; }
        .news-meta { display: flex; align-items: center; gap: 16px; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 10px; }
        .news-meta .cat { color: var(--primary); font-weight: 600; }
        .news-card h3 { font-size: 1rem; margin-bottom: 8px; line-height: 1.4; }
        .news-card h3 a { color: var(--text-primary); }
        .news-card h3 a:hover { color: var(--primary); }
        .news-card p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            color: var(--text-muted);
            font-size: 1.05rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }
        .news-empty i { font-size: 2rem; display: block; margin-bottom: 16px; opacity: 0.4; }

        /* ===== 使用流程 ===== */
        .flow-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
        .flow-step {
            text-align: center;
            position: relative;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .flow-step:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .flow-number {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
        }
        .flow-step h3 { font-size: 1rem; margin-bottom: 8px; }
        .flow-step p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0; }
        .flow-connector { display: none; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question i { color: var(--primary); transition: var(--transition); font-size: 0.9rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 28px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 28px 24px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            border-radius: var(--radius-xl);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            mix-blend-mode: overlay;
        }
        .cta-section h2 { color: #fff; font-size: clamp(1.6rem, 4vw, 2.4rem); margin-bottom: 12px; position: relative; }
        .cta-section p { color: rgba(255,255,255,0.75); font-size: 1.05rem; max-width: 560px; margin: 0 auto 32px; position: relative; }
        .cta-section .btn { position: relative; }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.6);
            padding: 60px 0 30px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.5); max-width: 320px; }
        .footer-social { display: flex; gap: 12px; margin-top: 20px; }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255,255,255,0.06);
            color: rgba(255,255,255,0.6);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.5); font-size: 0.9rem; }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .advantages-grid { grid-template-columns: repeat(2, 1fr); }
            .flow-steps { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .header { height: 64px; }
            .header-inner { height: 64px; }
            .nav { display: none; }
            .hamburger { display: flex; }
            .nav.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(18px);
                padding: 20px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                gap: 4px;
            }
            .nav.open a { width: 100%; }
            .nav-cta { margin-left: 0; text-align: center; }
            .hero { min-height: 70vh; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
            .hero-stat h3 { font-size: 1.4rem; }
            .intro-grid { grid-template-columns: 1fr; gap: 32px; }
            .intro-image img { height: 260px; }
            .intro-features { grid-template-columns: 1fr; }
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
            .advantages-grid { grid-template-columns: 1fr; }
            .category-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .flow-steps { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .cta-section { padding: 40px 24px; border-radius: var(--radius-lg); }
            .section { padding: 56px 0; }
            .hero-content { padding: 40px 0; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .hero-stat { flex: 1; min-width: 100px; }
            .hero-stats { gap: 16px; }
            .faq-question { padding: 16px 20px; font-size: 0.95rem; }
            .faq-answer { padding: 0 20px; font-size: 0.9rem; }
            .faq-item.active .faq-answer { padding: 0 20px 20px; }
        }

        /* ===== 辅助 ===== */
        .gap-8 { gap: 8px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-0 { margin-bottom: 0; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .w-full { width: 100%; }
        .rounded-full { border-radius: 50px; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a4a;
            --accent: #e8b830;
            --accent-light: #f0d060;
            --accent-dark: #c9a020;
            --bg: #f5f7fc;
            --bg-alt: #eef1f8;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #5a5a7a;
            --text-muted: #8a8aaa;
            --border: #e0e4f0;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(26, 42, 108, 0.08);
            --shadow-hover: 0 12px 40px rgba(26, 42, 108, 0.16);
            --shadow-lg: 0 20px 60px rgba(26, 42, 108, 0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

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

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

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

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

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header & Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 30px rgba(26, 42, 108, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(26, 42, 108, 0.25);
        }

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

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

        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }

        .nav a:hover {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.06);
        }

        .nav a.active {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.08);
            font-weight: 600;
        }

        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark)) !important;
            color: var(--primary-dark) !important;
            font-weight: 600 !important;
            padding: 8px 22px !important;
            border-radius: var(--radius-sm) !important;
            box-shadow: 0 4px 14px rgba(232, 184, 48, 0.35);
            transition: all var(--transition) !important;
            margin-left: 8px;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 184, 48, 0.45) !important;
            background: linear-gradient(135deg, var(--accent-light), var(--accent)) !important;
        }

        .nav-cta i {
            margin-right: 6px;
        }

        /* Mobile menu toggle */
        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border: none;
            background: transparent;
            font-size: 22px;
            color: var(--primary);
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
            align-items: center;
            justify-content: center;
        }

        .menu-toggle:hover {
            background: rgba(26, 42, 108, 0.06);
        }

        /* ===== Article Hero ===== */
        .article-hero {
            padding: 120px 0 50px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }

        .article-hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .article-hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }

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

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

        .article-hero-breadcrumb .sep {
            color: rgba(255, 255, 255, 0.35);
        }

        .article-hero-category {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 20px;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .article-hero h1 {
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            max-width: 860px;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .article-hero-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
        }

        .article-hero-meta i {
            margin-right: 6px;
            color: var(--accent);
        }

        .article-hero-meta span {
            display: flex;
            align-items: center;
        }

        /* ===== Article Body ===== */
        .article-body-section {
            padding: 60px 0 80px;
            background: var(--bg);
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }

        .article-main {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 40px 44px;
            overflow: hidden;
        }

        .article-main .article-content {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text);
        }

        .article-main .article-content p {
            margin-bottom: 1.5em;
        }

        .article-main .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary);
            margin: 2em 0 0.8em;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--bg-alt);
        }

        .article-main .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--primary-light);
            margin: 1.8em 0 0.6em;
        }

        .article-main .article-content img {
            border-radius: var(--radius);
            margin: 1.5em 0;
            box-shadow: var(--shadow);
            width: 100%;
        }

        .article-main .article-content ul,
        .article-main .article-content ol {
            margin: 1em 0 1.5em 1.6em;
        }

        .article-main .article-content ul li {
            list-style: disc;
            margin-bottom: 0.4em;
        }

        .article-main .article-content ol li {
            list-style: decimal;
            margin-bottom: 0.4em;
        }

        .article-main .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--bg-alt);
            padding: 16px 24px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }

        .article-main .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .article-main .article-content a:hover {
            color: var(--accent-dark);
        }

        .article-main .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }

        .article-main .article-tags .tag {
            display: inline-block;
            padding: 5px 16px;
            background: var(--bg-alt);
            border-radius: 20px;
            font-size: 13px;
            color: var(--text-light);
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .article-main .article-tags .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px 24px;
        }

        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 18px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--bg-alt);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-card h3 i {
            color: var(--accent);
            font-size: 16px;
        }

        .sidebar-related-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--bg-alt);
        }

        .sidebar-related-list li:last-child {
            border-bottom: none;
        }

        .sidebar-related-list a {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--text);
            transition: all var(--transition);
        }

        .sidebar-related-list a:hover {
            color: var(--primary);
        }

        .sidebar-related-list .thumb {
            width: 64px;
            height: 48px;
            border-radius: 6px;
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-alt);
        }

        .sidebar-related-list .info {
            flex: 1;
            min-width: 0;
        }

        .sidebar-related-list .info .title {
            font-size: 14px;
            font-weight: 600;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .sidebar-related-list .info .date {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
        }

        .sidebar-cta h4 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .sidebar-cta p {
            font-size: 14px;
            opacity: 0.85;
            margin-bottom: 20px;
            line-height: 1.6;
        }

        .sidebar-cta .btn-accent {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 600;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(232, 184, 48, 0.3);
        }

        .sidebar-cta .btn-accent:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(232, 184, 48, 0.4);
        }

        .sidebar-category-list li {
            padding: 8px 0;
        }

        .sidebar-category-list a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: var(--text-light);
            font-size: 15px;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }

        .sidebar-category-list a:hover {
            background: var(--bg-alt);
            color: var(--primary);
        }

        .sidebar-category-list a .count {
            background: var(--bg-alt);
            padding: 2px 12px;
            border-radius: 12px;
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== Not Found ===== */
        .article-notfound {
            text-align: center;
            padding: 80px 24px;
        }

        .article-notfound .icon {
            font-size: 64px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .article-notfound h2 {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .article-notfound p {
            color: var(--text-light);
            margin-bottom: 24px;
            font-size: 16px;
        }

        .article-notfound .btn-back {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all var(--transition);
        }

        .article-notfound .btn-back:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            color: #fff;
            font-size: 20px;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            opacity: 0.75;
            max-width: 340px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }

        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 18px;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-3px);
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }

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

        .footer-col ul a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            transition: all var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        .footer-bottom {
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            opacity: 0.6;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 820px) {
            .article-hero {
                min-height: 260px;
                padding: 100px 0 40px;
            }
            .article-main {
                padding: 28px 24px;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }

            .nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                box-shadow: 0 20px 40px rgba(26, 42, 108, 0.12);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                border-bottom: 1px solid var(--border);
                z-index: 999;
            }

            .nav.open {
                transform: translateY(0);
                opacity: 1;
            }

            .nav a {
                width: 100%;
                padding: 12px 18px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }

            .nav a.active::after {
                display: none;
            }

            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
                width: 100%;
            }

            .article-hero h1 {
                font-size: 26px;
            }

            .article-hero-meta {
                font-size: 13px;
                gap: 12px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .header-inner {
                padding: 0 16px;
            }

            .logo {
                font-size: 18px;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }

            .article-hero {
                padding: 90px 0 32px;
                min-height: 220px;
            }

            .article-hero h1 {
                font-size: 22px;
            }

            .article-hero-breadcrumb {
                font-size: 12px;
            }

            .article-main {
                padding: 20px 16px;
                border-radius: var(--radius);
            }

            .article-main .article-content {
                font-size: 15px;
            }

            .article-main .article-content h2 {
                font-size: 20px;
            }

            .article-main .article-content h3 {
                font-size: 17px;
            }

            .sidebar-card {
                padding: 20px 16px;
            }

            .footer {
                padding: 40px 0 24px;
            }
        }

        /* ===== Additional utilities ===== */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

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

        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-dark: #0f1a47;
            --primary-light: #2d4a8e;
            --accent: #f0b429;
            --accent-light: #fcd34d;
            --accent-dark: #d4941a;
            --bg: #f8f9fc;
            --bg-card: #ffffff;
            --bg-dark: #0f1a2e;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 48px rgba(0, 0, 0, 0.10);
            --shadow-btn: 0 4px 14px rgba(240, 180, 41, 0.35);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--primary-dark);
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2.2rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }
        .header.scrolled {
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .logo .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.2rem;
            box-shadow: 0 4px 12px rgba(26, 42, 108, 0.2);
        }
        .logo span.accent {
            color: var(--accent-dark);
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav a:hover {
            background: rgba(26, 42, 108, 0.06);
            color: var(--primary);
        }
        .nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(26, 42, 108, 0.2);
        }
        .nav a.active:hover {
            background: var(--primary-dark);
            color: #fff;
        }
        .nav .nav-cta {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary-dark) !important;
            font-weight: 700;
            padding: 10px 26px;
            border-radius: 30px;
            box-shadow: var(--shadow-btn);
            margin-left: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(240, 180, 41, 0.4);
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            color: var(--primary-dark) !important;
        }
        .nav .nav-cta i {
            font-size: 0.9rem;
        }

        /* Mobile Menu Toggle */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .nav-toggle span {
            width: 26px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 6px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -6px);
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -60px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(240, 180, 41, 0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero .breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(8px);
            padding: 6px 18px 6px 22px;
            border-radius: 40px;
            margin-bottom: 28px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.85rem;
        }
        .page-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }
        .page-hero .breadcrumb a:hover {
            color: var(--accent);
        }
        .page-hero .breadcrumb span {
            color: rgba(255, 255, 255, 0.9);
        }
        .page-hero .breadcrumb i {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.7rem;
        }
        .page-hero h1 {
            color: #fff;
            font-size: 3.2rem;
            font-weight: 800;
            letter-spacing: -1px;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }
        .page-hero h1 i {
            color: var(--accent);
        }
        .page-hero p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.2rem;
            max-width: 640px;
            margin: 0 auto 30px;
            line-height: 1.7;
        }
        .page-hero .hero-badges {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .page-hero .hero-badges span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(6px);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .page-hero .hero-badges span i {
            color: var(--accent);
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3 {
            color: #fff;
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            border-radius: 4px;
            margin: 16px auto 0;
        }
        .section-header p {
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 580px;
            margin: 0 auto;
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.65);
        }

        /* ===== Platform Intro ===== */
        .platform-intro {
            padding: 80px 0;
            background: var(--bg-card);
        }
        .platform-intro .grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .platform-intro .intro-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            position: relative;
        }
        .platform-intro .intro-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .platform-intro .intro-image:hover img {
            transform: scale(1.03);
        }
        .platform-intro .intro-image .image-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 0.8rem;
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }
        .platform-intro .intro-text h2 {
            margin-bottom: 20px;
            font-size: 2rem;
        }
        .platform-intro .intro-text p {
            color: var(--text-light);
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .platform-intro .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 24px;
        }
        .platform-intro .intro-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text);
            padding: 8px 12px;
            background: var(--bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
        }
        .platform-intro .intro-features li i {
            color: var(--accent-dark);
            font-size: 1rem;
            flex-shrink: 0;
        }

        /* ===== Login Flow ===== */
        .login-flow {
            padding: 80px 0;
            background: var(--bg);
        }
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 20px;
            position: relative;
        }
        .flow-steps::before {
            content: '';
            position: absolute;
            top: 56px;
            left: 120px;
            right: 120px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--primary-light), var(--accent));
            opacity: 0.3;
            z-index: 0;
            border-radius: 4px;
        }
        .flow-step {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px 28px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            z-index: 1;
        }
        .flow-step:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--accent);
        }
        .flow-step .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 800;
            margin: 0 auto 16px;
            box-shadow: 0 6px 20px rgba(26, 42, 108, 0.2);
        }
        .flow-step .step-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .flow-step h4 {
            margin-bottom: 8px;
            font-size: 1.1rem;
        }
        .flow-step p {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ===== Platform Features ===== */
        .platform-features {
            padding: 80px 0;
            background: var(--bg-card);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 32px 28px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 0;
            background: linear-gradient(180deg, var(--accent), var(--accent-light));
            transition: height var(--transition);
            border-radius: 0 4px 4px 0;
        }
        .feature-card:hover::before {
            height: 100%;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(240, 180, 41, 0.2);
        }
        .feature-card .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(26, 42, 108, 0.06), rgba(26, 42, 108, 0.02));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 18px;
            transition: all var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            transform: scale(1.05);
        }
        .feature-card h4 {
            margin-bottom: 10px;
            font-size: 1.15rem;
        }
        .feature-card p {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .feature-card .feature-tag {
            display: inline-block;
            margin-top: 14px;
            padding: 2px 12px;
            border-radius: 16px;
            background: rgba(240, 180, 41, 0.12);
            color: var(--accent-dark);
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        /* ===== Security Section ===== */
        .security-section {
            padding: 80px 0;
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .security-section .section-header h2 {
            color: #fff;
        }
        .security-section .section-header h2::after {
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
        }
        .security-section .section-header p {
            color: rgba(255, 255, 255, 0.6);
        }
        .security-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .security-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            padding: 32px 28px;
            backdrop-filter: blur(10px);
            transition: all var(--transition);
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }
        .security-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(240, 180, 41, 0.2);
            transform: translateY(-3px);
        }
        .security-card .sec-icon {
            width: 48px;
            height: 48px;
            min-width: 48px;
            border-radius: 14px;
            background: rgba(240, 180, 41, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent);
        }
        .security-card h4 {
            color: #fff;
            margin-bottom: 6px;
            font-size: 1.1rem;
        }
        .security-card p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
            background: var(--bg-card);
        }
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent);
        }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            list-style: none;
            transition: color var(--transition);
        }
        .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: 0.8rem;
            color: var(--text-light);
            transition: transform var(--transition), color var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--accent-dark);
        }
        .faq-item[open] summary {
            color: var(--primary);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
            margin-top: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2.4rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.15rem;
            max-width: 520px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.1rem;
            padding: 16px 40px;
            border-radius: 40px;
            box-shadow: var(--shadow-btn);
            transition: all var(--transition);
            border: none;
        }
        .cta-section .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(240, 180, 41, 0.4);
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
        }
        .cta-section .cta-btn i {
            font-size: 1rem;
        }
        .cta-section .cta-note {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.85rem;
            margin-top: 18px;
            margin-bottom: 0;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer .footer-brand .logo .logo-icon {
            background: rgba(255, 255, 255, 0.08);
        }
        .footer .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
            margin-bottom: 18px;
        }
        .footer .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            transition: all var(--transition);
            font-size: 1rem;
        }
        .footer .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-3px);
        }
        .footer .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer .footer-col ul li a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            transition: color var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer .footer-col ul li a i {
            font-size: 0.8rem;
            width: 16px;
        }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer .footer-bottom span:last-child {
            color: rgba(255, 255, 255, 0.25);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .flow-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .flow-steps::before {
                display: none;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .platform-intro .grid {
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .page-hero {
                padding: 110px 0 60px;
                min-height: 300px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .page-hero .hero-badges span {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
            .nav {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px 24px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                border-bottom: 1px solid var(--border);
                gap: 4px;
                align-items: stretch;
                z-index: 999;
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav a {
                padding: 12px 18px;
                border-radius: 12px;
                font-size: 1rem;
            }
            .nav .nav-cta {
                margin-left: 0;
                justify-content: center;
                margin-top: 6px;
                padding: 14px 18px;
            }
            .nav-toggle {
                display: flex;
            }
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .platform-intro .grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .platform-intro .intro-image img {
                height: 240px;
            }
            .platform-intro .intro-features {
                grid-template-columns: 1fr;
            }
            .flow-steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .security-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .security-card {
                padding: 24px 20px;
                flex-direction: column;
                gap: 12px;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .cta-section .cta-btn {
                padding: 14px 32px;
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .page-hero .breadcrumb {
                font-size: 0.75rem;
                padding: 4px 14px 4px 18px;
            }
            .flow-step {
                padding: 24px 18px 22px;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .faq-item summary {
                padding: 14px 18px;
                font-size: 0.9rem;
            }
            .faq-item .faq-answer {
                padding: 0 18px 14px;
                font-size: 0.85rem;
            }
            .section-header p {
                font-size: 0.95rem;
            }
            .footer .footer-col ul li a {
                font-size: 0.85rem;
            }
        }

        /* ===== Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 3px;
            border-radius: 8px;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 6px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary);
        }