/* roulang page: index */
:root {
  --primary: #1a365d;
  --primary-light: #2d4a7a;
  --primary-lighter: #3b5e8f;
  --accent: #eab308;
  --accent-light: #facc15;
  --accent-dark: #ca8a04;
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-light: #64748b;
  --text-lighter: #94a3b8;
  --text-on-dark: #f1f5f9;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
  --shadow-accent: 0 4px 20px rgba(234,179,8,0.25);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-height: 72px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 16px; } }

/* header */
.header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: rgba(255,255,255,0.95); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); transition: box-shadow var(--transition); }
.header.scrolled { box-shadow: var(--shadow); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-height); }
.logo { font-size: 1.5rem; font-weight: 800; color: var(--primary); letter-spacing: -0.02em; display: flex; align-items: center; gap: 8px; }
.logo i { color: var(--accent); font-size: 1.3rem; }
.logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav { display: flex; align-items: center; gap: 32px; }
.nav a { font-size: 0.95rem; font-weight: 500; color: var(--text); position: relative; padding: 4px 0; }
.nav a::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--accent); transition: width var(--transition); }
.nav a:hover::after, .nav a.active::after { width: 100%; }
.nav a.active { color: var(--primary); font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.search-toggle { background: none; border: none; font-size: 1.2rem; color: var(--text-light); cursor: pointer; padding: 8px; border-radius: var(--radius-sm); transition: background var(--transition), color var(--transition); }
.search-toggle:hover { background: var(--bg-alt); color: var(--primary); }
.mobile-toggle { display: none; background: none; border: none; font-size: 1.4rem; color: var(--text); cursor: pointer; padding: 8px; border-radius: var(--radius-sm); }
.mobile-toggle:hover { background: var(--bg-alt); }
@media (max-width: 768px) {
  .nav { display: none; flex-direction: column; position: absolute; top: var(--header-height); left: 0; width: 100%; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); padding: 16px 24px; gap: 16px; }
  .nav.open { display: flex; }
  .mobile-toggle { display: block; }
}

/* hero */
.hero { padding: 120px 0 80px; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-lighter) 100%); position: relative; overflow: hidden; min-height: 520px; display: flex; align-items: center; }
.hero::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat; opacity: 0.18; mix-blend-mode: overlay; }
.hero::after { content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 80px; background: linear-gradient(to top, var(--bg), transparent); }
.hero-content { position: relative; z-index: 2; max-width: 720px; }
.hero-tag { display: inline-flex; align-items: center; gap: 6px; background: rgba(255,255,255,0.15); backdrop-filter: blur(4px); color: var(--accent); padding: 6px 16px; border-radius: 50px; font-size: 0.85rem; font-weight: 500; margin-bottom: 20px; border: 1px solid rgba(255,255,255,0.10); }
.hero h1 { font-size: 3.2rem; font-weight: 800; color: #fff; line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 20px; }
.hero h1 em { color: var(--accent); font-style: normal; }
.hero p { font-size: 1.15rem; color: rgba(255,255,255,0.80); line-height: 1.7; margin-bottom: 32px; max-width: 600px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 50px; font-weight: 600; font-size: 0.95rem; border: none; cursor: pointer; transition: all var(--transition); }
.btn-primary { background: var(--accent); color: var(--primary); box-shadow: var(--shadow-accent); }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(234,179,8,0.35); color: var(--primary); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.30); }
.btn-outline:hover { background: rgba(255,255,255,0.10); border-color: rgba(255,255,255,0.50); transform: translateY(-2px); color: #fff; }
.hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.12); }
.hero-stat h3 { font-size: 2rem; font-weight: 700; color: #fff; }
.hero-stat p { font-size: 0.9rem; color: rgba(255,255,255,0.60); margin-bottom: 0; }
@media (max-width: 768px) {
  .hero { padding: 100px 0 60px; min-height: 420px; }
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stat h3 { font-size: 1.5rem; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
}

/* sections */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: var(--text-on-dark); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 2rem; font-weight: 700; color: var(--text); letter-spacing: -0.01em; margin-bottom: 12px; }
.section-header p { font-size: 1.05rem; color: var(--text-light); max-width: 600px; margin: 0 auto; }
.section-dark .section-header h2 { color: #fff; }
.section-dark .section-header p { color: rgba(255,255,255,0.60); }
@media (max-width: 768px) {
  .section { padding: 48px 0; }
  .section-header h2 { font-size: 1.6rem; }
}

/* intro */
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.intro-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.intro-image img { width: 100%; height: 360px; object-fit: cover; transition: transform 0.5s ease; }
.intro-image:hover img { transform: scale(1.03); }
.intro-text h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 16px; color: var(--primary); }
.intro-text p { color: var(--text-light); line-height: 1.8; margin-bottom: 16px; }
.intro-features { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 20px; }
.intro-feature { display: flex; align-items: center; gap: 10px; font-size: 0.95rem; color: var(--text); }
.intro-feature i { color: var(--accent); font-size: 1.1rem; width: 20px; text-align: center; }
@media (max-width: 768px) {
  .intro-grid { grid-template-columns: 1fr; gap: 32px; }
  .intro-features { grid-template-columns: 1fr; }
}

/* categories */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.cat-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: all var(--transition); border: 1px solid var(--border); }
.cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.cat-card-image { height: 200px; overflow: hidden; }
.cat-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.cat-card:hover .cat-card-image img { transform: scale(1.05); }
.cat-card-body { padding: 20px 24px 24px; }
.cat-card-body h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.cat-card-body p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; margin-bottom: 16px; }
.cat-card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.85rem; color: var(--text-lighter); }
.cat-card-meta i { width: 14px; text-align: center; }
.cat-tag { display: inline-block; padding: 4px 12px; border-radius: 50px; font-size: 0.75rem; font-weight: 600; background: var(--bg-alt); color: var(--primary); margin-bottom: 12px; }

/* latest posts */
.posts-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 24px; }
.post-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: all var(--transition); border: 1px solid var(--border); display: flex; flex-direction: column; }
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.post-card-image { height: 200px; overflow: hidden; position: relative; }
.post-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.post-card:hover .post-card-image img { transform: scale(1.04); }
.post-card-cat { position: absolute; top: 12px; left: 12px; background: var(--accent); color: var(--primary); padding: 4px 12px; border-radius: 50px; font-size: 0.75rem; font-weight: 600; }
.post-card-body { padding: 20px 24px 24px; flex: 1; display: flex; flex-direction: column; }
.post-card-body h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; line-height: 1.5; color: var(--text); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-card-body p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; margin-bottom: 16px; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.post-card-footer { display: flex; align-items: center; justify-content: space-between; font-size: 0.85rem; color: var(--text-lighter); padding-top: 12px; border-top: 1px solid var(--border-light); }
.post-card-footer i { margin-right: 4px; }
@media (max-width: 520px) {
  .posts-grid { grid-template-columns: 1fr; }
}

/* features / 流程 */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.feature-card { text-align: center; padding: 32px 20px; background: rgba(255,255,255,0.05); border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.08); transition: all var(--transition); }
.feature-card:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); }
.feature-icon { width: 64px; height: 64px; margin: 0 auto 20px; background: rgba(234,179,8,0.15); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; color: var(--accent); }
.feature-card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 10px; color: #fff; }
.feature-card p { font-size: 0.9rem; color: rgba(255,255,255,0.60); line-height: 1.6; }
@media (max-width: 768px) {
  .features-grid { grid-template-columns: 1fr; gap: 20px; }
}

/* numbers */
.numbers-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.number-card { padding: 32px 16px; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--border); }
.number-card h3 { font-size: 2.6rem; font-weight: 800; color: var(--primary); line-height: 1.2; margin-bottom: 4px; }
.number-card h3 span { color: var(--accent); }
.number-card p { font-size: 0.9rem; color: var(--text-light); }
@media (max-width: 768px) {
  .numbers-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .number-card h3 { font-size: 2rem; }
}
@media (max-width: 520px) {
  .numbers-grid { grid-template-columns: 1fr 1fr; }
}

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); transition: box-shadow var(--transition); }
.faq-item:hover { box-shadow: var(--shadow); }
.faq-question { padding: 20px 24px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 600; font-size: 1rem; color: var(--text); transition: color var(--transition); }
.faq-question i { font-size: 0.9rem; color: var(--text-lighter); transition: transform var(--transition); }
.faq-item.active .faq-question { color: var(--primary); }
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--accent); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 24px; }
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 20px; }
.faq-answer p { font-size: 0.95rem; color: var(--text-light); line-height: 1.7; }

/* CTA */
.cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-lighter) 100%); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat; opacity: 0.10; mix-blend-mode: overlay; }
.cta-content { position: relative; z-index: 2; text-align: center; padding: 80px 0; }
.cta-content h2 { font-size: 2.4rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.cta-content p { font-size: 1.1rem; color: rgba(255,255,255,0.75); max-width: 560px; margin: 0 auto 32px; }
.cta-content .btn-primary { font-size: 1.05rem; padding: 14px 36px; }
@media (max-width: 768px) {
  .cta-content h2 { font-size: 1.8rem; }
  .cta-content p { font-size: 0.95rem; }
}

/* footer */
.footer { background: var(--bg-dark); color: var(--text-on-dark); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand .logo span { -webkit-text-fill-color: #fff; background: none; }
.footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.50); line-height: 1.7; max-width: 320px; }
.footer-col h4 { font-size: 0.95rem; font-weight: 600; color: #fff; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 0.9rem; color: rgba(255,255,255,0.50); transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom { padding: 24px 0; display: flex; align-items: center; justify-content: space-between; font-size: 0.85rem; color: rgba(255,255,255,0.35); }
.footer-socials { display: flex; gap: 12px; }
.footer-socials a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.06); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.40); transition: all var(--transition); font-size: 0.9rem; }
.footer-socials a:hover { background: var(--accent); color: var(--primary); }
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* empty state */
.empty-state { text-align: center; padding: 48px 20px; color: var(--text-lighter); }
.empty-state i { font-size: 3rem; margin-bottom: 16px; display: block; }
.empty-state p { font-size: 1rem; }

/* scroll to top */
.scroll-top { position: fixed; bottom: 32px; right: 32px; width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: #fff; border: none; font-size: 1.2rem; cursor: pointer; box-shadow: var(--shadow-lg); transition: all var(--transition); opacity: 0; visibility: hidden; z-index: 999; }
.scroll-top.visible { opacity: 1; visibility: visible; }
.scroll-top:hover { background: var(--accent); color: var(--primary); transform: translateY(-4px); }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #E63946;
            --primary-dark: #C1121F;
            --primary-light: #F1FAEE;
            --secondary: #1D3557;
            --secondary-light: #457B9D;
            --accent: #F4A261;
            --bg: #F8F9FA;
            --bg-alt: #FFFFFF;
            --bg-dark: #1D3557;
            --text: #1A1A2E;
            --text-light: #6C757D;
            --text-inverse: #FFFFFF;
            --border: #E0E0E0;
            --border-light: #F0F0F0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 2px 12px rgba(0,0,0,0.06);
            --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
            --transition: 0.25s ease;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --gap: 2rem;
        }

        /* ===== 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a { color: var(--secondary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        ul { list-style: none; }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        /* ===== Header & Navigation ===== */
        .header {
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(0,0,0,0.03);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 1rem;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--secondary);
            white-space: nowrap;
        }
        .logo i { color: var(--primary); font-size: 1.5rem; }
        .logo span { color: var(--secondary); }
        .nav {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav a {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
        }
        .nav a:hover { color: var(--primary); background: var(--primary-light); }
        .nav a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 0.3rem 0.3rem 0.3rem 1rem;
            margin-left: 0.75rem;
            transition: var(--transition);
        }
        .nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(230,57,70,0.1); }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 0.3rem 0;
            font-size: 0.85rem;
            outline: none;
            color: var(--text);
            width: 100px;
        }
        .nav-search button {
            background: var(--primary);
            border: none;
            color: #fff;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            cursor: pointer;
            transition: var(--transition);
            font-size: 0.8rem;
        }
        .nav-search button:hover { background: var(--primary-dark); }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--secondary); cursor: pointer; }

        /* ===== Article Hero ===== */
        .article-hero {
            background: linear-gradient(135deg, var(--secondary) 0%, #0F1A2E 100%);
            padding: 3rem 0 2.5rem;
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .article-hero .container { position: relative; z-index: 1; }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.65);
            margin-bottom: 1rem;
        }
        .article-breadcrumb a { color: rgba(255,255,255,0.8); }
        .article-breadcrumb a:hover { color: #fff; }
        .article-breadcrumb i { font-size: 0.7rem; }
        .article-category-badge {
            display: inline-block;
            padding: 0.25rem 1rem;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }
        .article-hero h1 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            max-width: 850px;
            margin-bottom: 0.75rem;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1.25rem;
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        .article-meta i { margin-right: 0.3rem; }

        /* ===== Article Main ===== */
        .article-main {
            padding: 2.5rem 0 3.5rem;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
        }
        .article-content {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 2.5rem;
            box-shadow: var(--shadow);
        }
        .article-content h2 { font-size: 1.5rem; margin: 2rem 0 0.75rem; color: var(--secondary); }
        .article-content h3 { font-size: 1.2rem; margin: 1.5rem 0 0.5rem; color: var(--secondary); }
        .article-content p { margin-bottom: 1.25rem; color: var(--text); line-height: 1.8; }
        .article-content ul, .article-content ol { margin: 1rem 0 1.5rem 1.5rem; }
        .article-content li { margin-bottom: 0.5rem; line-height: 1.7; }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text);
        }
        .article-content img { border-radius: var(--radius-sm); margin: 1.5rem 0; }
        .article-content .content-image {
            display: flex;
            flex-direction: column;
            align-items: center;
            margin: 1.5rem 0;
        }
        .article-content .content-image img { width: 100%; max-width: 700px; border-radius: var(--radius-sm); }
        .article-content .content-image span { font-size: 0.85rem; color: var(--text-light); margin-top: 0.5rem; }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-light);
        }
        .article-tags .tag {
            padding: 0.25rem 0.9rem;
            background: var(--primary-light);
            color: var(--primary-dark);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .article-tags .tag:hover { background: var(--primary); color: #fff; }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .sidebar-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary-light);
        }
        .sidebar-list li {
            padding: 0.6rem 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            color: var(--text);
            font-size: 0.9rem;
            font-weight: 500;
            display: block;
            transition: var(--transition);
        }
        .sidebar-list a:hover { color: var(--primary); padding-left: 4px; }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius);
            padding: 1.5rem;
            text-align: center;
        }
        .sidebar-cta h4 { font-size: 1.1rem; margin-bottom: 0.5rem; }
        .sidebar-cta p { font-size: 0.9rem; opacity: 0.9; margin-bottom: 1rem; }
        .sidebar-cta .btn { background: #fff; color: var(--primary-dark); }
        .sidebar-cta .btn:hover { background: var(--primary-light); }

        /* ===== Related Section ===== */
        .related-section {
            background: var(--bg-alt);
            padding: 2.5rem 0;
            border-top: 1px solid var(--border-light);
        }
        .related-section h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 1.5rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .related-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .related-card img { width: 100%; height: 160px; object-fit: cover; border-radius: 0; }
        .related-card-body { padding: 1rem 1.25rem 1.25rem; }
        .related-card-body h3 { font-size: 1rem; font-weight: 600; color: var(--text); margin-bottom: 0.3rem; }
        .related-card-body h3 a { color: inherit; }
        .related-card-body h3 a:hover { color: var(--primary); }
        .related-card-body .meta { font-size: 0.8rem; color: var(--text-light); }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            background: var(--primary);
            color: #fff;
        }
        .btn:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 4px 12px rgba(230,57,70,0.3); }
        .btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
        .btn-outline:hover { background: var(--primary); color: #fff; }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 3rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer-brand .logo { color: #fff; margin-bottom: 0.75rem; }
        .footer-brand .logo i { color: var(--primary); }
        .footer-brand .logo span { color: #fff; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; opacity: 0.8; max-width: 360px; }
        .footer-col h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 1rem; }
        .footer-col ul li { margin-bottom: 0.5rem; }
        .footer-col ul a { color: rgba(255,255,255,0.7); font-size: 0.9rem; transition: var(--transition); }
        .footer-col ul a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.25rem 0;
            font-size: 0.85rem;
            opacity: 0.7;
            flex-wrap: wrap;
            gap: 0.75rem;
        }
        .footer-socials { display: flex; gap: 0.75rem; }
        .footer-socials a { color: rgba(255,255,255,0.7); font-size: 1.2rem; transition: var(--transition); }
        .footer-socials a:hover { color: var(--accent); }

        /* ===== Not Found ===== */
        .not-found {
            text-align: center;
            padding: 4rem 1rem;
        }
        .not-found i { font-size: 3rem; color: var(--primary); margin-bottom: 1rem; }
        .not-found h2 { font-size: 1.5rem; color: var(--secondary); margin-bottom: 0.5rem; }
        .not-found p { color: var(--text-light); margin-bottom: 1.5rem; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .nav { display: none; flex-direction: column; background: var(--bg-alt); position: absolute; top: 64px; left: 0; right: 0; padding: 1rem; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
            .nav.open { display: flex; }
            .nav-toggle { display: block; }
            .nav-search { margin-left: 0; margin-top: 0.5rem; }
            .nav-search input { width: 100%; }
            .header-inner { height: 56px; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-content { padding: 1.5rem; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .article-hero { padding: 2rem 0 1.5rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 1rem; }
            .article-hero h1 { font-size: 1.3rem; }
            .article-meta { font-size: 0.8rem; gap: 0.75rem; }
            .article-content { padding: 1rem; }
            .article-content h2 { font-size: 1.2rem; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .logo { font-size: 1.1rem; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #f1c0c4;
            --primary-gradient: linear-gradient(135deg, #e63946 0%, #c1121f 100%);
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --accent-light: #f9d4a7;
            --bg: #f8f9fa;
            --bg-dark: #1a1a2e;
            --bg-card: #ffffff;
            --text: #1d3557;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #e9ecef;
            --border-light: #f0f0f0;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.14);
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container: 1200px;
            --header-h: 70px;
            --spacing: 80px;
            --spacing-sm: 40px;
            --spacing-lg: 120px;
        }

        /* ===== 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: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-bottom: 1rem;
        }
        h3 {
            font-size: 1.5rem;
            margin-bottom: 0.75rem;
        }
        h4 {
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--spacing) 0;
        }
        .section-sm {
            padding: var(--spacing-sm) 0;
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark p {
            color: var(--text-white);
        }
        .section-dark p {
            color: rgba(255, 255, 255, 0.8);
        }
        .text-center {
            text-align: center;
        }
        .text-primary {
            color: var(--primary);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid transparent;
            background: var(--primary-gradient);
            color: #fff;
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.35);
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.45);
            color: #fff;
        }
        .btn:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.3);
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
        }
        .btn-white:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.4);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 1.1rem;
        }

        /* ===== Badges & Tags ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .badge-secondary {
            background: #d4e6f1;
            color: var(--secondary);
        }
        .badge-accent {
            background: var(--accent-light);
            color: #8d5a2b;
        }
        .tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.8rem;
            background: var(--bg);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .logo i {
            font-size: 1.3rem;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text);
            transition: var(--transition);
            position: relative;
        }
        .nav a:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .nav a.active {
            background: var(--primary-gradient);
            color: #fff;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
        }
        .nav a.active:hover {
            color: #fff;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            background: none;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--text);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            padding-top: calc(var(--header-h) + 20px);
            min-height: 320px;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg), transparent);
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 60px 24px 80px;
        }
        .page-hero h1 {
            color: #fff;
            font-size: 3rem;
            margin-bottom: 0.5rem;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .page-hero .hero-sub {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.15rem;
            max-width: 680px;
            margin: 0 auto 1.5rem;
            line-height: 1.8;
        }
        .page-hero .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            transition: var(--transition);
        }
        .card:hover .card-img {
            transform: scale(1.03);
        }
        .card-body {
            padding: 20px 24px 24px;
        }
        .card-body .badge {
            margin-bottom: 10px;
        }
        .card-body h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }
        .card-body p {
            font-size: 0.92rem;
            margin-bottom: 12px;
            color: var(--text-light);
        }
        .card-footer {
            padding: 0 24px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
            margin-top: 4px;
        }

        /* ===== Grid ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        /* ===== List / Stats ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }
        .stat-item {
            padding: 30px 20px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.14);
            transform: translateY(-3px);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.8);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text);
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            transition: var(--transition);
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-gradient);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') 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: 0.75rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.9);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 1.5rem;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .footer .logo {
            margin-bottom: 16px;
        }
        .footer .logo span {
            -webkit-text-fill-color: #fff;
            background: none;
            color: #fff;
        }
        .footer .logo i {
            -webkit-text-fill-color: var(--primary);
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            background-clip: text;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            max-width: 340px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 700;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-socials {
            display: flex;
            gap: 14px;
        }
        .footer-socials a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.6);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-socials a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }
            .page-hero h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing: 50px;
                --spacing-lg: 80px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .hamburger {
                display: flex;
            }
            .nav {
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                box-shadow: var(--shadow);
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav a {
                width: 100%;
                text-align: center;
                padding: 12px;
            }
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 2rem;
            }
            .page-hero {
                min-height: 240px;
            }
            .page-hero h1 {
                font-size: 1.9rem;
            }
            .page-hero .hero-sub {
                font-size: 1rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-number {
                font-size: 1.7rem;
            }
            .btn {
                padding: 10px 22px;
                font-size: 0.85rem;
            }
            .btn-lg {
                padding: 14px 30px;
                font-size: 1rem;
            }
        }

        /* ===== Extra Utilities ===== */
        .mb-1 {
            margin-bottom: 0.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 1.5rem;
        }
        .mb-4 {
            margin-bottom: 2rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-4 {
            margin-top: 2rem;
        }
        .gap-2 {
            gap: 0.75rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .img-cover {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--primary-gradient);
            border-radius: 4px;
            margin: 0 auto 1rem;
        }
        .section-label {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }
        .text-muted {
            color: var(--text-light);
        }