/* roulang page: index */
:root {
            --primary: #1a3c6e;
            --primary-light: #2a5a9e;
            --primary-dark: #0f2a4e;
            --accent: #e8491d;
            --accent-light: #f05a2e;
            --bg: #f4f6f9;
            --bg-card: #ffffff;
            --text: #1e2a3a;
            --text-light: #6b7a8f;
            --text-muted: #9aabb8;
            --border: #e2e7ed;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 24px rgba(0,0,0,0.07);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.7; -webkit-font-smoothing: antialiased; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .container-narrow { max-width: 900px; }

        /* header / nav */
        .site-header { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 1050; box-shadow: 0 2px 12px rgba(0,0,0,0.04); }
        .navbar { padding: 0.75rem 0; }
        .navbar-brand { font-size: 1.6rem; font-weight: 800; color: var(--primary) !important; letter-spacing: -0.02em; display: flex; align-items: center; gap: 10px; }
        .navbar-brand i { color: var(--accent); font-size: 1.4rem; }
        .navbar-nav .nav-link { font-weight: 600; font-size: 0.95rem; padding: 0.5rem 1.2rem !important; color: var(--text) !important; border-radius: var(--radius-sm); transition: var(--transition); }
        .navbar-nav .nav-link:hover, .navbar-nav .nav-link.active { color: var(--primary) !important; background: rgba(26,60,110,0.08); }
        .navbar-nav .nav-link.active { font-weight: 700; }
        .nav-cta .btn { border-radius: 50px; padding: 0.5rem 1.8rem; font-weight: 600; font-size: 0.9rem; }
        .nav-search { position: relative; }
        .nav-search input { border-radius: 50px; border: 1px solid var(--border); background: var(--bg); padding: 0.45rem 1.2rem 0.45rem 2.4rem; font-size: 0.9rem; width: 200px; transition: var(--transition); }
        .nav-search input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,60,110,0.12); width: 240px; }
        .nav-search i { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-light); font-size: 0.9rem; }

        /* hero */
        .hero { padding: 80px 0 70px; background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%); color: #fff; position: relative; overflow: hidden; }
        .hero::after { content: ''; position: absolute; top: -30%; right: -10%; width: 500px; height: 500px; border-radius: 50%; background: rgba(255,255,255,0.04); pointer-events: none; }
        .hero h1 { font-size: 3rem; font-weight: 800; line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 1.2rem; }
        .hero h1 span { color: var(--accent); }
        .hero p { font-size: 1.2rem; opacity: 0.9; max-width: 600px; margin-bottom: 2rem; line-height: 1.8; }
        .hero .btn-hero { border-radius: 50px; padding: 0.85rem 2.8rem; font-weight: 700; font-size: 1.05rem; background: var(--accent); border: none; color: #fff; transition: var(--transition); box-shadow: 0 8px 30px rgba(232,73,29,0.35); }
        .hero .btn-hero:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 12px 40px rgba(232,73,29,0.45); }
        .hero .hero-stats { display: flex; gap: 40px; margin-top: 40px; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.15); }
        .hero .hero-stats .stat-num { font-size: 2rem; font-weight: 800; display: block; }
        .hero .hero-stats .stat-label { font-size: 0.9rem; opacity: 0.75; }
        .hero-img-wrap { position: relative; display: flex; align-items: center; justify-content: center; }
        .hero-img-wrap .hero-card { background: rgba(255,255,255,0.1); backdrop-filter: blur(12px); border-radius: var(--radius); padding: 30px; border: 1px solid rgba(255,255,255,0.15); max-width: 380px; }
        .hero-img-wrap .hero-card i { font-size: 2.5rem; color: var(--accent); margin-bottom: 15px; }
        .hero-img-wrap .hero-card h5 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
        .hero-img-wrap .hero-card p { font-size: 0.9rem; opacity: 0.8; margin: 0; }

        /* section */
        .section { padding: 70px 0; }
        .section-title { font-size: 2rem; font-weight: 800; margin-bottom: 0.5rem; color: var(--primary); letter-spacing: -0.01em; }
        .section-subtitle { font-size: 1.05rem; color: var(--text-light); max-width: 600px; margin-bottom: 2.5rem; }
        .section-divider { width: 60px; height: 4px; background: var(--accent); border-radius: 4px; margin-bottom: 1.5rem; }

        /* cards */
        .card-custom { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); transition: var(--transition); overflow: hidden; }
        .card-custom:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .card-custom .card-body { padding: 1.8rem; }
        .card-custom .card-icon { font-size: 2rem; color: var(--accent); margin-bottom: 1rem; }
        .card-custom .card-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.6rem; }
        .card-custom .card-text { color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }
        .card-custom .card-tag { display: inline-block; padding: 0.2rem 0.8rem; border-radius: 50px; font-size: 0.75rem; font-weight: 600; background: rgba(232,73,29,0.1); color: var(--accent); margin-right: 6px; margin-bottom: 6px; }

        /* grid */
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
        .grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 24px; }

        /* badges */
        .badge-custom { display: inline-block; padding: 0.3rem 1rem; border-radius: 50px; font-size: 0.8rem; font-weight: 600; background: var(--bg); color: var(--text-light); border: 1px solid var(--border); }
        .badge-custom.primary { background: rgba(26,60,110,0.1); color: var(--primary); border-color: transparent; }
        .badge-custom.accent { background: rgba(232,73,29,0.12); color: var(--accent); border-color: transparent; }

        /* news list */
        .news-list .news-item { display: flex; gap: 20px; padding: 1.2rem 0; border-bottom: 1px solid var(--border); transition: var(--transition); }
        .news-list .news-item:last-child { border-bottom: none; }
        .news-list .news-item:hover { padding-left: 8px; }
        .news-list .news-date { min-width: 70px; font-size: 0.85rem; color: var(--text-muted); }
        .news-list .news-cat { display: inline-block; font-size: 0.75rem; font-weight: 600; color: var(--accent); background: rgba(232,73,29,0.08); padding: 0.1rem 0.7rem; border-radius: 50px; margin-right: 8px; }
        .news-list .news-title { font-weight: 600; color: var(--text); transition: var(--transition); }
        .news-list .news-title:hover { color: var(--primary); }
        .news-list .news-summary { font-size: 0.9rem; color: var(--text-light); margin-top: 4px; }

        /* feature section with data */
        .data-block { background: var(--primary); color: #fff; border-radius: var(--radius); padding: 2.5rem; text-align: center; }
        .data-block .num { font-size: 2.8rem; font-weight: 800; display: block; line-height: 1.2; }
        .data-block .label { font-size: 0.95rem; opacity: 0.8; }

        /* faq */
        .faq-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 12px; overflow: hidden; background: var(--bg-card); }
        .faq-item .faq-q { padding: 1.2rem 1.8rem; font-weight: 700; cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: var(--transition); background: #fff; }
        .faq-item .faq-q:hover { background: var(--bg); }
        .faq-item .faq-q i { transition: var(--transition); color: var(--text-light); }
        .faq-item.active .faq-q i { transform: rotate(180deg); color: var(--accent); }
        .faq-item .faq-a { padding: 0 1.8rem 1.2rem; color: var(--text-light); line-height: 1.8; display: none; }
        .faq-item.active .faq-a { display: block; }

        /* cta */
        .cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); color: #fff; border-radius: var(--radius); padding: 60px 50px; text-align: center; }
        .cta-section h2 { font-size: 2.2rem; font-weight: 800; margin-bottom: 1rem; }
        .cta-section p { font-size: 1.1rem; opacity: 0.9; max-width: 600px; margin: 0 auto 2rem; }
        .cta-section .btn-cta { border-radius: 50px; padding: 0.9rem 3rem; font-weight: 700; font-size: 1.1rem; background: var(--accent); border: none; color: #fff; transition: var(--transition); box-shadow: 0 8px 30px rgba(232,73,29,0.3); }
        .cta-section .btn-cta:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 12px 40px rgba(232,73,29,0.4); }

        /* footer */
        .site-footer { background: var(--primary-dark); color: rgba(255,255,255,0.8); padding: 50px 0 30px; }
        .site-footer h5 { font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 1.2rem; }
        .site-footer a { color: rgba(255,255,255,0.7); transition: var(--transition); }
        .site-footer a:hover { color: var(--accent); text-decoration: none; }
        .site-footer .footer-links { list-style: none; padding: 0; }
        .site-footer .footer-links li { margin-bottom: 0.5rem; }
        .site-footer .footer-brand { font-size: 1.5rem; font-weight: 800; color: #fff; display: flex; align-items: center; gap: 10px; margin-bottom: 1rem; }
        .site-footer .footer-brand i { color: var(--accent); }
        .site-footer .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; margin-top: 30px; font-size: 0.9rem; text-align: center; color: rgba(255,255,255,0.5); }

        /* responsive */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .hero { padding: 50px 0 40px; text-align: center; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero .hero-stats { justify-content: center; gap: 24px; flex-wrap: wrap; }
            .hero-img-wrap { margin-top: 30px; }
            .grid-2, .grid-3 { grid-template-columns: 1fr; gap: 20px; }
            .grid-4 { grid-template-columns: 1fr 1fr; gap: 16px; }
            .section { padding: 50px 0; }
            .section-title { font-size: 1.6rem; }
            .nav-search input { width: 140px; }
            .nav-search input:focus { width: 160px; }
            .cta-section { padding: 40px 24px; }
            .cta-section h2 { font-size: 1.6rem; }
            .navbar-brand { font-size: 1.3rem; }
            .navbar-nav .nav-link { padding: 0.5rem 0.8rem !important; font-size: 0.85rem; }
            .news-list .news-item { flex-direction: column; gap: 6px; }
            .news-list .news-date { min-width: auto; }
            .site-footer .footer-col { margin-bottom: 24px; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.6rem; }
            .hero .hero-stats { flex-direction: column; gap: 16px; align-items: center; }
            .grid-4 { grid-template-columns: 1fr; }
            .navbar-brand { font-size: 1.1rem; }
            .nav-search { display: none; }
            .nav-cta .btn { padding: 0.4rem 1.2rem; font-size: 0.8rem; }
            .section-title { font-size: 1.4rem; }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a44;
            --accent: #e63946;
            --accent-light: #ff6b6b;
            --accent-dark: #c1121f;
            --bg: #f8f9fc;
            --bg-alt: #eef1f7;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #5a6a7e;
            --text-muted: #8a9aa8;
            --border: #e2e6ee;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(26,42,108,0.08);
            --shadow-hover: 0 16px 48px rgba(26,42,108,0.16);
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --header-height: 76px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            padding-top: var(--header-height);
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--primary-dark); }
        .container { max-width: var(--max-width); padding: 0 24px; margin: 0 auto; }
        .container-narrow { max-width: 860px; padding: 0 24px; margin: 0 auto; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1050;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(226,230,238,0.6);
            height: var(--header-height);
            transition: var(--transition);
        }
        .site-header .container { height: 100%; }
        .site-header .navbar {
            display: flex; align-items: center; justify-content: space-between;
            height: 100%; padding: 0;
        }
        .navbar-brand {
            font-size: 1.4rem; font-weight: 800; color: var(--primary) !important;
            display: flex; align-items: center; gap: 10px; letter-spacing: -0.3px;
        }
        .navbar-brand i { color: var(--accent); font-size: 1.5rem; }
        .navbar-brand:hover i { transform: scale(1.1); transition: var(--transition); }
        .navbar-nav .nav-link {
            font-size: 0.95rem; font-weight: 600; color: var(--text-light) !important;
            padding: 8px 18px !important; border-radius: var(--radius-sm);
            transition: var(--transition); position: relative;
        }
        .navbar-nav .nav-link:hover { color: var(--primary) !important; background: rgba(26,42,108,0.05); }
        .navbar-nav .nav-link.active { color: var(--accent) !important; background: rgba(230,57,70,0.08); }
        .navbar-nav .nav-link.active::after {
            content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
            width: 24px; height: 3px; background: var(--accent); border-radius: 4px;
        }
        .nav-search {
            display: flex; align-items: center; gap: 8px;
            background: var(--bg-alt); border-radius: 40px; padding: 6px 16px;
            border: 1px solid var(--border); transition: var(--transition);
        }
        .nav-search:focus-within { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(26,42,108,0.1); }
        .nav-search i { color: var(--text-muted); font-size: 0.9rem; }
        .nav-search input {
            border: none; background: transparent; outline: none;
            font-size: 0.9rem; color: var(--text); width: 140px;
        }
        .nav-search input::placeholder { color: var(--text-muted); }
        .nav-cta .btn { border-radius: 40px; padding: 8px 24px; font-weight: 700; font-size: 0.9rem; letter-spacing: 0.3px; }
        .navbar-toggler { border: none; padding: 6px; border-radius: var(--radius-sm); }
        .navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(26,42,108,0.15); }
        .navbar-toggler-icon { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%231a2a6c' stroke-width='2.5' stroke-linecap='round' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E"); }

        /* ===== Article Hero ===== */
        .article-hero {
            padding: 48px 0 32px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            position: relative; overflow: hidden;
        }
        .article-hero::before {
            content: ''; position: absolute; inset: 0;
            background: radial-gradient(ellipse at 20% 60%, rgba(230,57,70,0.15) 0%, transparent 60%),
                        radial-gradient(ellipse at 80% 40%, rgba(255,255,255,0.05) 0%, transparent 50%);
        }
        .article-hero .container-narrow { position: relative; z-index: 2; }
        .article-hero .breadcrumb {
            background: transparent; padding: 0; margin-bottom: 16px;
            font-size: 0.9rem; 
        }
        .article-hero .breadcrumb-item a { color: rgba(255,255,255,0.7); }
        .article-hero .breadcrumb-item a:hover { color: #fff; }
        .article-hero .breadcrumb-item.active { color: rgba(255,255,255,0.9); }
        .article-hero .breadcrumb-item + .breadcrumb-item::before { color: rgba(255,255,255,0.4); }
        .article-hero .post-category {
            display: inline-block; background: var(--accent); color: #fff;
            padding: 4px 16px; border-radius: 40px; font-size: 0.8rem; font-weight: 700;
            letter-spacing: 0.5px; margin-bottom: 16px;
        }
        .article-hero h1 {
            font-size: 2.6rem; font-weight: 800; color: #fff;
            line-height: 1.25; margin-bottom: 20px; letter-spacing: -0.5px;
        }
        .article-hero .post-meta {
            display: flex; align-items: center; gap: 20px; color: rgba(255,255,255,0.7);
            font-size: 0.9rem; flex-wrap: wrap;
        }
        .article-hero .post-meta i { margin-right: 6px; }
        .article-hero .post-meta span { display: flex; align-items: center; }

        /* ===== Article Body ===== */
        .article-main { padding: 48px 0 64px; }
        .article-body {
            background: var(--bg-card); border-radius: var(--radius-lg);
            padding: 48px 56px; box-shadow: var(--shadow);
            font-size: 1.05rem; line-height: 1.9; color: var(--text);
        }
        .article-body p { margin-bottom: 1.5rem; }
        .article-body h2 { font-size: 1.6rem; margin-top: 2.5rem; margin-bottom: 1rem; color: var(--primary); }
        .article-body h3 { font-size: 1.3rem; margin-top: 2rem; margin-bottom: 0.8rem; color: var(--primary-light); }
        .article-body ul, .article-body ol { margin-bottom: 1.5rem; padding-left: 1.5rem; }
        .article-body li { margin-bottom: 0.5rem; }
        .article-body img { border-radius: var(--radius); margin: 1.5rem 0; width: 100%; }
        .article-body blockquote {
            border-left: 4px solid var(--accent); background: var(--bg-alt);
            padding: 16px 24px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.5rem 0; font-style: italic; color: var(--text-light);
        }
        .article-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
        .article-body a:hover { color: var(--accent-dark); }

        .article-footer-bar {
            display: flex; align-items: center; justify-content: space-between;
            margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border);
            flex-wrap: wrap; gap: 16px;
        }
        .article-tags { display: flex; flex-wrap: wrap; gap: 8px; }
        .article-tags .tag {
            display: inline-block; background: var(--bg-alt); color: var(--text-light);
            padding: 4px 16px; border-radius: 40px; font-size: 0.85rem; font-weight: 500;
            transition: var(--transition);
        }
        .article-tags .tag:hover { background: var(--primary); color: #fff; }
        .article-share { display: flex; gap: 12px; }
        .article-share a {
            width: 40px; height: 40px; border-radius: 50%; background: var(--bg-alt);
            display: flex; align-items: center; justify-content: center;
            color: var(--text-light); transition: var(--transition); font-size: 1rem;
        }
        .article-share a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

        /* ===== Related Posts ===== */
        .related-section { padding: 0 0 64px; }
        .related-section h2 {
            font-size: 1.8rem; font-weight: 800; margin-bottom: 32px;
            color: var(--primary-dark); position: relative;
            display: inline-block;
        }
        .related-section h2::after {
            content: ''; display: block; width: 60px; height: 4px;
            background: var(--accent); border-radius: 4px; margin-top: 8px;
        }
        .related-card {
            background: var(--bg-card); border-radius: var(--radius);
            padding: 24px; box-shadow: var(--shadow); transition: var(--transition);
            height: 100%; border: 1px solid var(--border);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .related-card .card-category {
            display: inline-block; font-size: 0.75rem; font-weight: 700;
            color: var(--accent); text-transform: uppercase; letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .related-card h5 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
        .related-card h5 a { color: var(--primary-dark); }
        .related-card h5 a:hover { color: var(--accent); }
        .related-card .card-excerpt {
            font-size: 0.9rem; color: var(--text-light);
            display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
        }
        .related-card .card-date { font-size: 0.8rem; color: var(--text-muted); margin-top: 12px; display: flex; align-items: center; gap: 6px; }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center; padding: 80px 24px; background: var(--bg-card);
            border-radius: var(--radius-lg); box-shadow: var(--shadow);
        }
        .not-found-box i { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; display: block; }
        .not-found-box h2 { font-size: 1.8rem; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-light); margin-bottom: 24px; }
        .not-found-box .btn { border-radius: 40px; padding: 10px 32px; font-weight: 700; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark); color: rgba(255,255,255,0.85);
            padding: 56px 0 0; margin-top: 0;
        }
        .site-footer .footer-brand { font-size: 1.4rem; font-weight: 800; color: #fff; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
        .site-footer .footer-brand i { color: var(--accent); }
        .site-footer h5 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 16px; letter-spacing: 0.5px; }
        .site-footer .footer-links { list-style: none; padding: 0; margin: 0; }
        .site-footer .footer-links li { margin-bottom: 10px; font-size: 0.9rem; }
        .site-footer .footer-links a { color: rgba(255,255,255,0.7); transition: var(--transition); }
        .site-footer .footer-links a:hover { color: #fff; padding-left: 4px; }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding: 20px 0; margin-top: 40px; text-align: center;
            font-size: 0.85rem; color: rgba(255,255,255,0.5);
        }
        .site-footer .footer-col { margin-bottom: 32px; }
        .site-footer a i { transition: var(--transition); }
        .site-footer a:hover i { transform: scale(1.15); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-hero h1 { font-size: 2.2rem; }
            .article-body { padding: 36px 32px; }
        }
        @media (max-width: 768px) {
            :root { --header-height: 68px; }
            .site-header .navbar { flex-wrap: nowrap; }
            .navbar-brand { font-size: 1.2rem; }
            .nav-search { display: none; }
            .nav-cta .btn { padding: 6px 16px; font-size: 0.8rem; }
            .article-hero { padding: 32px 0 24px; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-hero .post-meta { gap: 12px; font-size: 0.8rem; }
            .article-main { padding: 24px 0 40px; }
            .article-body { padding: 24px 20px; border-radius: var(--radius); font-size: 0.95rem; }
            .article-body h2 { font-size: 1.3rem; }
            .article-body h3 { font-size: 1.1rem; }
            .article-footer-bar { flex-direction: column; align-items: flex-start; }
            .related-section h2 { font-size: 1.4rem; }
            .site-footer { padding: 40px 0 0; }
            .site-footer .footer-brand { font-size: 1.2rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 1.3rem; }
            .article-body { padding: 16px; }
            .article-body blockquote { padding: 12px 16px; }
            .navbar-nav .nav-link { padding: 6px 12px !important; font-size: 0.85rem; }
            .related-card { padding: 16px; }
            .not-found-box { padding: 40px 16px; }
            .not-found-box i { font-size: 3rem; }
        }

        /* ===== Bootstrap Overrides ===== */
        .btn-primary { background: var(--accent); border-color: var(--accent); border-radius: 40px; font-weight: 700; }
        .btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(230,57,70,0.3); }
        .btn-outline-primary { border-color: var(--primary); color: var(--primary); border-radius: 40px; font-weight: 600; }
        .btn-outline-primary:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
        .navbar-nav .nav-link { padding: 8px 16px !important; }
        .breadcrumb { background: transparent; }
        .navbar-collapse { background: transparent; }
        @media (max-width: 991px) {
            .navbar-collapse { background: #fff; border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); margin-top: 8px; }
            .navbar-nav .nav-link.active::after { display: none; }
            .nav-search { display: flex; margin: 12px 0; width: 100%; }
            .nav-search input { width: 100%; }
            .nav-cta { margin-top: 8px; width: 100%; }
            .nav-cta .btn { width: 100%; text-align: center; }
        }

/* roulang page: category1 */
:root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1b4a;
            --accent: #e74c3c;
            --accent-hover: #c0392b;
            --accent-light: #fde8e6;
            --bg-light: #f8f9fc;
            --bg-white: #ffffff;
            --text-dark: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.1);
            --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-base: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-base);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-dark);
            background: var(--bg-light);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        .container {
            max-width: var(--container-max);
            padding-left: 20px;
            padding-right: 20px;
            margin: 0 auto;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 28px;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-md);
            border: 2px solid transparent;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            line-height: 1.4;
            letter-spacing: 0.01em;
        }
        .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(231, 76, 60, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(231, 76, 60, 0.25);
        }
        .btn-outline {
            background: transparent;
            border-color: var(--border-color);
            color: var(--text-dark);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-light);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-lg {
            padding: 14px 40px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }
        .btn-sm {
            padding: 6px 18px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        .section-padding {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .section-subtitle {
            font-size: 1.08rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 48px auto;
            text-align: center;
            line-height: 1.7;
        }
        .section-label {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 700;
            padding: 4px 16px;
            border-radius: 50px;
            letter-spacing: 0.03em;
            margin-bottom: 12px;
        }

        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 1050;
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .navbar {
            padding: 0;
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }
        .navbar-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }
        .navbar-brand i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .navbar-brand:hover {
            color: var(--primary-dark);
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            padding: 6px 10px;
            font-size: 1.3rem;
            color: var(--text-dark);
            cursor: pointer;
            display: none;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--accent);
        }
        .navbar-collapse {
            display: flex;
            align-items: center;
            flex-grow: 1;
            justify-content: center;
        }
        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .nav-item .nav-link {
            padding: 8px 18px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-muted);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-item .nav-link:hover {
            color: var(--primary);
            background: var(--border-light);
        }
        .nav-item .nav-link.active {
            color: var(--accent);
            background: var(--accent-light);
        }
        .nav-item .nav-link:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            padding: 4px 16px;
            gap: 8px;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .nav-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.12);
        }
        .nav-search i {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 6px 0;
            font-size: 0.88rem;
            color: var(--text-dark);
            width: 130px;
            outline: none;
        }
        .nav-search input::placeholder {
            color: var(--text-light);
        }
        .nav-cta {
            flex-shrink: 0;
        }
        .nav-cta .btn {
            padding: 8px 22px;
            font-size: 0.88rem;
            border-radius: 50px;
        }

        @media (max-width: 991.98px) {
            .navbar-toggler {
                display: block;
            }
            .navbar-collapse {
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
                padding: 16px 24px;
                flex-direction: column;
                align-items: stretch;
                display: none;
                z-index: 1040;
            }
            .navbar-collapse.show {
                display: flex;
            }
            .navbar-nav {
                flex-direction: column;
                gap: 2px;
                width: 100%;
                margin-bottom: 16px;
            }
            .nav-item .nav-link {
                padding: 10px 16px;
                width: 100%;
            }
            .nav-search {
                width: 100%;
                margin-bottom: 12px;
            }
            .nav-search input {
                width: 100%;
            }
            .nav-cta {
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }
        }

        @media (min-width: 992px) {
            .navbar-collapse {
                display: flex !important;
                position: static;
                box-shadow: none;
                border: none;
                padding: 0;
                background: transparent;
            }
        }

        .page-hero {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            padding: 64px 0 72px;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            opacity: 0.3;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            line-height: 1.15;
        }
        .page-hero h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .page-hero p {
            font-size: 1.15rem;
            opacity: 0.85;
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .page-hero .hero-meta {
            display: flex;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
            font-size: 0.95rem;
            opacity: 0.75;
        }
        .page-hero .hero-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .page-hero .hero-meta i {
            color: var(--accent);
        }

        @media (max-width: 767.98px) {
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .page-hero .hero-meta {
                gap: 16px;
                font-size: 0.85rem;
            }
            .section-padding {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
        }

        .breadcrumb-area {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            padding: 12px 0;
        }
        .breadcrumb-area .breadcrumb {
            background: transparent;
            padding: 0;
            margin: 0;
            font-size: 0.88rem;
        }
        .breadcrumb-area .breadcrumb-item a {
            color: var(--text-muted);
        }
        .breadcrumb-area .breadcrumb-item a:hover {
            color: var(--accent);
        }
        .breadcrumb-area .breadcrumb-item.active {
            color: var(--text-dark);
            font-weight: 600;
        }
        .breadcrumb-item+.breadcrumb-item::before {
            color: var(--text-light);
        }

        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .guide-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .guide-card .card-img {
            height: 200px;
            background: var(--border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3rem;
            color: var(--primary-light);
            position: relative;
            overflow: hidden;
        }
        .guide-card .card-img .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.5));
        }
        .guide-card .card-img i {
            position: relative;
            z-index: 1;
            background: rgba(255, 255, 255, 0.15);
            padding: 20px;
            border-radius: 50%;
            backdrop-filter: blur(4px);
        }
        .guide-card .card-body {
            padding: 24px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card .card-body .tag {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent);
            font-size: 0.72rem;
            font-weight: 700;
            padding: 3px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
            align-self: flex-start;
            letter-spacing: 0.02em;
        }
        .guide-card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .guide-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
        }
        .guide-card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
            margin-top: auto;
        }
        .guide-card .card-body .card-meta i {
            margin-right: 4px;
        }
        .guide-card .card-body .card-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
            margin-top: 4px;
        }
        .guide-card .card-body .card-link:hover {
            gap: 10px;
            color: var(--accent-hover);
        }

        @media (max-width: 991.98px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 575.98px) {
            .guide-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .guide-card .card-img {
                height: 160px;
            }
        }

        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .stat-item .number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-item .label {
            font-size: 0.92rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .stat-item i {
            font-size: 1.8rem;
            color: var(--primary-light);
            margin-bottom: 12px;
            display: block;
        }

        @media (max-width: 767.98px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .number {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 480px) {
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
        }

        .timeline-wrap {
            position: relative;
            padding-left: 40px;
        }
        .timeline-wrap::before {
            content: '';
            position: absolute;
            left: 16px;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(180deg, var(--accent), var(--primary-light));
            border-radius: 10px;
        }
        .timeline-item {
            position: relative;
            padding: 0 0 36px 28px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -28px;
            top: 6px;
            width: 14px;
            height: 14px;
            background: var(--accent);
            border-radius: 50%;
            border: 3px solid var(--bg-white);
            box-shadow: 0 0 0 3px var(--accent);
        }
        .timeline-item .time {
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.03em;
            margin-bottom: 4px;
        }
        .timeline-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 4px;
        }
        .timeline-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        @media (max-width: 575.98px) {
            .timeline-wrap {
                padding-left: 28px;
            }
            .timeline-item {
                padding: 0 0 24px 20px;
            }
            .timeline-item::before {
                left: -22px;
                width: 12px;
                height: 12px;
            }
        }

        .faq-accordion .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
        }
        .faq-accordion .accordion-button {
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-dark);
            background: var(--bg-white);
            padding: 18px 24px;
            border: none;
            box-shadow: none;
            transition: var(--transition);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--accent);
            background: var(--accent-light);
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--accent);
            outline-offset: -2px;
        }
        .faq-accordion .accordion-button::after {
            background-size: 1rem;
            transition: var(--transition);
        }
        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            text-align: center;
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M50 50v-5h-5v5h-5v5h5v5h5v-5h5v-5h-5zm0-40V5h-5v5h-5v5h5v5h5v-5h5v-5h-5zM10 50v-5H5v5H0v5h5v5h5v-5h5v-5H10zM10 10V5H5v5H0v5h5v5h5v-5h5v-5H10z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            opacity: 0.2;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .cta-section p {
            font-size: 1.1rem;
            opacity: 0.85;
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .btn {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
            padding: 14px 44px;
            font-size: 1.05rem;
            border-radius: 50px;
        }
        .cta-section .btn:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(231, 76, 60, 0.4);
        }

        @media (max-width: 767.98px) {
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .btn {
                padding: 12px 32px;
                font-size: 0.95rem;
            }
        }

        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 56px 0 0;
        }
        .site-footer .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .site-footer .footer-brand i {
            color: var(--accent);
        }
        .site-footer p {
            font-size: 0.92rem;
            opacity: 0.75;
            line-height: 1.7;
            max-width: 360px;
        }
        .site-footer .footer-col h5 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            transition: var(--transition);
            text-decoration: none;
        }
        .site-footer .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .site-footer .footer-links i {
            color: rgba(255, 255, 255, 0.5);
            width: 20px;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            margin-top: 40px;
            text-align: center;
            font-size: 0.85rem;
            opacity: 0.6;
            letter-spacing: 0.02em;
        }
        .site-footer .d-flex a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .site-footer .d-flex a:hover {
            color: var(--accent);
            transform: scale(1.1);
        }

        @media (max-width: 767.98px) {
            .site-footer {
                padding: 40px 0 0;
            }
            .site-footer .footer-col {
                margin-bottom: 24px;
            }
            .site-footer .footer-brand {
                font-size: 1.2rem;
            }
            .site-footer p {
                max-width: 100%;
            }
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .tag-cloud .tag-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            padding: 8px 20px;
            font-size: 0.88rem;
            color: var(--text-muted);
            font-weight: 500;
            transition: var(--transition);
            text-decoration: none;
        }
        .tag-cloud .tag-item:hover {
            background: var(--accent-light);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .tag-cloud .tag-item .count {
            background: var(--border-light);
            padding: 0 8px;
            border-radius: 20px;
            font-size: 0.72rem;
            color: var(--text-light);
            margin-left: 6px;
            font-weight: 700;
        }
        .tag-cloud .tag-item:hover .count {
            background: var(--accent);
            color: #fff;
        }

        .content-list .list-item {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            padding: 18px 0;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .content-list .list-item:last-child {
            border-bottom: none;
        }
        .content-list .list-item:hover {
            padding-left: 8px;
        }
        .content-list .list-item .item-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            background: var(--accent-light);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.1rem;
        }
        .content-list .list-item .item-content h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 4px;
            line-height: 1.3;
        }
        .content-list .list-item .item-content p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.5;
        }
        .content-list .list-item .item-content .meta {
            font-size: 0.78rem;
            color: var(--text-light);
            margin-top: 4px;
            display: flex;
            gap: 12px;
        }

        .bg-soft {
            background: var(--bg-light);
        }
        .bg-white {
            background: var(--bg-white);
        }

        .text-accent {
            color: var(--accent);
        }
        .text-primary-dark {
            color: var(--primary-dark);
        }

        .mb-0 {
            margin-bottom: 0;
        }
        .mt-2 {
            margin-top: 8px;
        }
        .mt-3 {
            margin-top: 16px;
        }
        .mt-4 {
            margin-top: 24px;
        }
        .mb-3 {
            margin-bottom: 16px;
        }
        .mb-4 {
            margin-bottom: 24px;
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .d-flex {
            display: flex;
        }
        .align-items-center {
            align-items: center;
        }
        .justify-content-center {
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .text-center {
            text-align: center;
        }
        .w-100 {
            width: 100%;
        }
        .position-relative {
            position: relative;
        }
        .overflow-hidden {
            overflow: hidden;
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
            .page-hero h1 {
                font-size: 1.5rem;
            }
            .page-hero p {
                font-size: 0.92rem;
            }
            .guide-card .card-body {
                padding: 18px 16px 16px;
            }
            .guide-card .card-body h3 {
                font-size: 1.05rem;
            }
        }

        @media (min-width: 992px) and (max-width: 1199.98px) {
            .guide-grid {
                gap: 20px;
            }
            .nav-search input {
                width: 100px;
            }
        }

        .back-to-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: 50%;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            cursor: pointer;
            transition: var(--transition);
            z-index: 1020;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-to-top:hover {
            background: var(--accent-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .back-to-top:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 4px;
        }