/* roulang page: index */
:root {
  --primary: #0e7c9e;
  --primary-light: #e8f3f8;
  --primary-dark: #0a5d7a;
  --secondary: #f5a623;
  --secondary-light: #fef3e0;
  --bg: #f6f9fc;
  --bg-card: #ffffff;
  --text: #1a2a3a;
  --text-weak: #6b7a8a;
  --border: #dce5ed;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --transition: all 0.25s ease;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  --max-w: 1200px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.6; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }
ul { list-style: none; }
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.section-title { font-size: 2rem; font-weight: 700; margin-bottom: 12px; letter-spacing: -0.02em; color: var(--text); }
.section-sub { font-size: 1.1rem; color: var(--text-weak); max-width: 640px; margin-bottom: 40px; line-height: 1.5; }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* ===== Header / Nav ===== */
header { background: #fff; box-shadow: 0 1px 4px rgba(0,0,0,0.04); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 700; color: var(--primary); }
.logo-icon { width: 34px; height: 34px; background: var(--primary); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1.1rem; }
.logo span { color: var(--text); }
nav { display: flex; align-items: center; gap: 8px; }
nav a { padding: 8px 18px; border-radius: var(--radius-sm); color: var(--text-weak); font-weight: 500; font-size: 0.95rem; 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; }
.header-actions { display: flex; align-items: center; gap: 14px; }
.search-box { display: flex; align-items: center; background: var(--bg); border-radius: 40px; padding: 0 16px; border: 1px solid var(--border); transition: var(--transition); }
.search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(14,124,158,0.12); }
.search-box input { border: none; background: transparent; padding: 8px 10px; outline: none; width: 160px; font-size: 0.9rem; color: var(--text); }
.search-box input::placeholder { color: var(--text-weak); }
.search-box button { background: none; border: none; color: var(--text-weak); cursor: pointer; padding: 6px 0; font-size: 1rem; }
.btn-cta { background: var(--primary); color: #fff; border: none; padding: 10px 26px; border-radius: 40px; font-weight: 600; font-size: 0.95rem; cursor: pointer; transition: var(--transition); }
.btn-cta:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(14,124,158,0.25); color: #fff; }
.btn-cta-secondary { background: var(--secondary); color: #1a2a3a; }
.btn-cta-secondary:hover { background: #e0960f; color: #1a2a3a; box-shadow: 0 6px 20px rgba(245,166,35,0.3); }
.menu-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text); cursor: pointer; padding: 6px; }

/* ===== Hero ===== */
.hero { position: relative; min-height: 560px; display: flex; align-items: center; background: linear-gradient(135deg, #0e7c9e 0%, #0a5d7a 100%); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat; opacity: 0.18; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(14,124,158,0.92) 0%, rgba(10,93,122,0.88) 100%); }
.hero-content { position: relative; z-index: 2; text-align: center; padding: 80px 0; color: #fff; }
.hero-title { font-size: 3.2rem; font-weight: 800; margin-bottom: 16px; letter-spacing: -0.03em; line-height: 1.15; }
.hero-title span { color: var(--secondary); }
.hero-desc { font-size: 1.2rem; opacity: 0.9; max-width: 600px; margin: 0 auto 32px; line-height: 1.6; }
.hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.hero-actions .btn-cta { font-size: 1.05rem; padding: 14px 36px; }
.hero-search { max-width: 500px; margin: 28px auto 0; display: flex; background: rgba(255,255,255,0.15); border-radius: 50px; padding: 4px; backdrop-filter: blur(6px); }
.hero-search input { flex: 1; border: none; background: transparent; padding: 12px 20px; color: #fff; outline: none; font-size: 0.95rem; }
.hero-search input::placeholder { color: rgba(255,255,255,0.6); }
.hero-search button { background: var(--secondary); border: none; padding: 12px 28px; border-radius: 40px; font-weight: 600; color: #1a2a3a; cursor: pointer; transition: var(--transition); }
.hero-search button:hover { background: #e0960f; }
.hero-stats { display: flex; justify-content: center; gap: 40px; margin-top: 40px; flex-wrap: wrap; }
.hero-stat { text-align: center; }
.hero-stat-num { font-size: 2rem; font-weight: 800; }
.hero-stat-label { font-size: 0.9rem; opacity: 0.75; margin-top: 2px; }

/* ===== Features ===== */
.features-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.feature-card { background: var(--bg-card); border-radius: var(--radius-md); padding: 36px 28px; box-shadow: var(--shadow-sm); transition: var(--transition); border: 1px solid var(--border); }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feature-icon { width: 56px; height: 56px; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 1.6rem; margin-bottom: 18px; }
.feature-icon.blue { background: var(--primary-light); color: var(--primary); }
.feature-icon.amber { background: var(--secondary-light); color: var(--secondary); }
.feature-icon.teal { background: #e0f5f0; color: #0d9488; }
.feature-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
.feature-card p { color: var(--text-weak); font-size: 0.95rem; line-height: 1.6; }

/* ===== Categories ===== */
.categories-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.category-card { background: var(--bg-card); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition); border: 1px solid var(--border); }
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.category-card-img { height: 180px; background-size: cover; background-position: center; position: relative; }
.category-card-img .tag { position: absolute; top: 14px; left: 14px; background: var(--secondary); color: #1a2a3a; padding: 4px 14px; border-radius: 40px; font-size: 0.8rem; font-weight: 600; }
.category-card-body { padding: 20px 22px 24px; }
.category-card-body h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 6px; }
.category-card-body p { color: var(--text-weak); font-size: 0.9rem; line-height: 1.5; margin-bottom: 14px; }
.category-card-body .btn-text { color: var(--primary); font-weight: 600; font-size: 0.9rem; display: inline-flex; align-items: center; gap: 6px; }
.category-card-body .btn-text:hover { gap: 10px; }

/* ===== Latest News ===== */
.news-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.news-card { background: var(--bg-card); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition); border: 1px solid var(--border); display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.news-card-img { height: 200px; background-size: cover; background-position: center; }
.news-card-body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.news-card-body .meta { display: flex; gap: 14px; font-size: 0.8rem; color: var(--text-weak); margin-bottom: 8px; }
.news-card-body .meta .cat { background: var(--primary-light); color: var(--primary); padding: 2px 12px; border-radius: 40px; font-weight: 500; }
.news-card-body h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; line-height: 1.4; }
.news-card-body p { color: var(--text-weak); font-size: 0.9rem; line-height: 1.5; flex: 1; }
.news-card-body .read-more { margin-top: 14px; color: var(--primary); font-weight: 600; font-size: 0.9rem; }
.news-empty { grid-column: 1 / -1; text-align: center; padding: 48px 20px; color: var(--text-weak); background: var(--bg-card); border-radius: var(--radius-md); border: 1px dashed var(--border); }

/* ===== Process ===== */
.process-steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.process-step { text-align: center; position: relative; }
.process-step:not(:last-child)::after { content: ''; position: absolute; top: 32px; left: 60%; width: 80%; height: 2px; background: var(--border); }
.process-num { width: 64px; height: 64px; border-radius: 50%; background: var(--primary-light); color: var(--primary); font-size: 1.5rem; font-weight: 800; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; }
.process-step h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.process-step p { color: var(--text-weak); font-size: 0.9rem; line-height: 1.5; }

/* ===== Stats ===== */
.stats-section { background: var(--primary); color: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; text-align: center; }
.stat-item .num { font-size: 2.6rem; font-weight: 800; line-height: 1.2; }
.stat-item .label { font-size: 1rem; opacity: 0.85; margin-top: 4px; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--bg-card); border-radius: var(--radius-md); border: 1px solid var(--border); overflow: hidden; transition: var(--transition); }
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-question { padding: 18px 24px; font-weight: 600; font-size: 1.05rem; display: flex; justify-content: space-between; align-items: center; cursor: pointer; user-select: none; }
.faq-question .icon { font-size: 1.2rem; transition: var(--transition); color: var(--text-weak); }
.faq-item.open .faq-question .icon { transform: rotate(180deg); }
.faq-answer { padding: 0 24px 18px; color: var(--text-weak); line-height: 1.7; font-size: 0.95rem; display: none; }
.faq-item.open .faq-answer { display: block; }

/* ===== CTA ===== */
.cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: #fff; text-align: center; padding: 72px 0; }
.cta-section h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 12px; }
.cta-section p { font-size: 1.1rem; opacity: 0.9; margin-bottom: 28px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-section .btn-cta { background: var(--secondary); color: #1a2a3a; font-size: 1.1rem; padding: 14px 40px; }
.cta-section .btn-cta:hover { background: #e0960f; box-shadow: 0 6px 24px rgba(245,166,35,0.35); }

/* ===== Footer ===== */
footer { background: #0f1a2a; color: rgba(255,255,255,0.7); padding: 48px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
.footer-brand .logo { color: #fff; margin-bottom: 12px; }
.footer-brand .logo span { color: #fff; }
.footer-brand p { font-size: 0.9rem; line-height: 1.6; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 14px; }
.footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 0.9rem; padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--secondary); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 20px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; color: rgba(255,255,255,0.45); }
.footer-bottom a { color: rgba(255,255,255,0.5); }

/* ===== Tabs / Tags ===== */
.tags { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 24px; }
.tag { padding: 6px 18px; border-radius: 40px; font-size: 0.85rem; font-weight: 500; background: var(--bg-card); border: 1px solid var(--border); color: var(--text-weak); cursor: pointer; transition: var(--transition); }
.tag:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.tag.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2,1fr); }
  .categories-grid { grid-template-columns: repeat(2,1fr); }
  .process-steps { grid-template-columns: repeat(2,1fr); }
  .process-step:not(:last-child)::after { display: none; }
  .stats-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  .header-inner { height: 60px; }
  nav { display: none; position: absolute; top: 60px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 12px 20px 20px; box-shadow: 0 8px 24px rgba(0,0,0,0.08); gap: 4px; border-top: 1px solid var(--border); }
  nav.open { display: flex; }
  nav a { padding: 10px 16px; width: 100%; }
  .menu-toggle { display: block; }
  .search-box input { width: 120px; }
  .hero-title { font-size: 2.2rem; }
  .hero-desc { font-size: 1rem; }
  .hero { min-height: 420px; }
  .hero-content { padding: 60px 0; }
  .hero-stats { gap: 24px; }
  .hero-stat-num { font-size: 1.5rem; }
  .section { padding: 48px 0; }
  .section-title { font-size: 1.6rem; }
  .features-grid { grid-template-columns: 1fr; }
  .categories-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; gap: 28px; }
  .stats-grid { grid-template-columns: repeat(2,1fr); gap: 16px; }
  .stat-item .num { font-size: 1.8rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .header-actions .btn-cta { display: none; }
  .hero-actions .btn-cta { font-size: 0.95rem; padding: 12px 28px; }
  .cta-section h2 { font-size: 1.7rem; }
}
@media (max-width: 520px) {
  .container { padding: 0 14px; }
  .hero-title { font-size: 1.7rem; }
  .hero-search { flex-direction: column; background: transparent; gap: 8px; }
  .hero-search input { background: rgba(255,255,255,0.12); border-radius: 40px; }
  .hero-search button { width: 100%; }
  .section-title { font-size: 1.4rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

:root {
  --primary: #0e7c9e; --primary-light: #e8f3f8; --primary-dark: #0a5d7a;
  --secondary: #f5a623; --bg: #f6f9fc; --bg-card: #ffffff;
  --text: #1a2a3a; --text-weak: #6b7a8a; --border: #dce5ed;
  --radius-sm: 8px; --radius-md: 14px; --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04); --shadow-md: 0 6px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08); --transition: all 0.25s ease;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  --max-w: 1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.6;}
a{color:var(--primary);text-decoration:none;transition:var(--transition);}
a:hover{color:var(--primary-dark);}
img{max-width:100%;height:auto;display:block;}
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 20px;}
.section{padding:56px 0;}
.section-title{font-size:1.8rem;font-weight:700;margin-bottom:12px;}
.text-center{text-align:center;}
.mx-auto{margin-left:auto;margin-right:auto;}
header{background:#fff;box-shadow:0 1px 4px rgba(0,0,0,0.04);position:sticky;top:0;z-index:100;}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;}
.logo{display:flex;align-items:center;gap:10px;font-size:1.35rem;font-weight:700;color:var(--primary);}
.logo-icon{width:34px;height:34px;background:var(--primary);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;}
.logo span{color:var(--text);}
nav{display:flex;align-items:center;gap:8px;}
nav a{padding:8px 18px;border-radius:var(--radius-sm);color:var(--text-weak);font-weight:500;font-size:0.95rem;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;}
.header-actions{display:flex;align-items:center;gap:14px;}
.search-box{display:flex;align-items:center;background:var(--bg);border-radius:40px;padding:0 16px;border:1px solid var(--border);}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(14,124,158,0.12);}
.search-box input{border:none;background:transparent;padding:8px 10px;outline:none;width:160px;font-size:0.9rem;color:var(--text);}
.search-box input::placeholder{color:var(--text-weak);}
.search-box button{background:none;border:none;color:var(--text-weak);cursor:pointer;padding:6px 0;font-size:1rem;}
.btn-cta{background:var(--primary);color:#fff;border:none;padding:10px 26px;border-radius:40px;font-weight:600;font-size:0.95rem;cursor:pointer;transition:var(--transition);}
.btn-cta:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 6px 20px rgba(14,124,158,0.25);color:#fff;}
.menu-toggle{display:none;background:none;border:none;font-size:1.5rem;color:var(--text);cursor:pointer;padding:6px;}
.article-banner{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);padding:56px 0;color:#fff;}
.article-banner .meta{display:flex;gap:16px;font-size:0.9rem;opacity:0.85;margin-bottom:10px;flex-wrap:wrap;}
.article-banner .meta .cat{background:var(--secondary);color:#1a2a3a;padding:2px 14px;border-radius:40px;font-weight:600;}
.article-banner h1{font-size:2.2rem;font-weight:800;line-height:1.2;margin-bottom:12px;}
.article-banner .desc{font-size:1.1rem;opacity:0.9;max-width:720px;}
.article-body{background:var(--bg-card);border-radius:var(--radius-md);padding:40px 48px;box-shadow:var(--shadow-sm);border:1px solid var(--border);line-height:1.8;font-size:1.05rem;color:var(--text);}
.article-body p{margin-bottom:18px;}
.article-body h2{font-size:1.4rem;font-weight:700;margin:28px 0 12px;}
.article-body h3{font-size:1.15rem;font-weight:600;margin:22px 0 10px;}
.article-body img{border-radius:var(--radius-sm);margin:20px 0;}
.article-body ul{padding-left:24px;margin-bottom:18px;list-style:disc;}
.article-body li{margin-bottom:6px;}
.article-not-found{text-align:center;padding:80px 20px;}
.article-not-found h2{font-size:1.8rem;margin-bottom:12px;}
.article-not-found p{color:var(--text-weak);margin-bottom:20px;}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.related-card{background:var(--bg-card);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:var(--transition);}
.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);}
.related-card-img{height:160px;background-size:cover;background-position:center;}
.related-card-body{padding:16px 20px 20px;}
.related-card-body h4{font-size:1rem;font-weight:700;margin-bottom:4px;}
.related-card-body p{font-size:0.85rem;color:var(--text-weak);}
footer{background:#0f1a2a;color:rgba(255,255,255,0.7);padding:40px 0 20px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:28px;}
.footer-brand .logo{color:#fff;margin-bottom:10px;}
.footer-brand .logo span{color:#fff;}
.footer-brand p{font-size:0.85rem;line-height:1.6;max-width:320px;}
.footer-col h4{color:#fff;font-size:0.95rem;font-weight:600;margin-bottom:12px;}
.footer-col a{display:block;color:rgba(255,255,255,0.6);font-size:0.85rem;padding:3px 0;transition:var(--transition);}
.footer-col a:hover{color:var(--secondary);}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:16px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:0.8rem;color:rgba(255,255,255,0.45);}
@media(max-width:1024px){.related-grid{grid-template-columns:repeat(2,1fr);}.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:768px){
.header-inner{height:60px;}
nav{display:none;position:absolute;top:60px;left:0;right:0;background:#fff;flex-direction:column;padding:12px 20px 20px;box-shadow:0 8px 24px rgba(0,0,0,0.08);border-top:1px solid var(--border);}
nav.open{display:flex;}
nav a{padding:10px 16px;width:100%;}
.menu-toggle{display:block;}
.search-box input{width:120px;}
.article-banner h1{font-size:1.6rem;}
.article-body{padding:24px 20px;}
.related-grid{grid-template-columns:1fr;}
.footer-grid{grid-template-columns:1fr;}
.header-actions .btn-cta{display:none;}
}
@media(max-width:520px){
.container{padding:0 14px;}
.article-banner h1{font-size:1.3rem;}
.article-body{font-size:0.95rem;padding:18px 14px;}
}

:root {
  --primary: #0e7c9e; --primary-light: #e8f3f8; --primary-dark: #0a5d7a;
  --secondary: #f5a623; --bg: #f6f9fc; --bg-card: #ffffff;
  --text: #1a2a3a; --text-weak: #6b7a8a; --border: #dce5ed;
  --radius-sm: 8px; --radius-md: 14px; --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04); --shadow-md: 0 6px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08); --transition: all 0.25s ease;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  --max-w: 1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.6;}
a{color:var(--primary);text-decoration:none;transition:var(--transition);}
a:hover{color:var(--primary-dark);}
img{max-width:100%;height:auto;display:block;}
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 20px;}
.section{padding:56px 0;}
.section-title{font-size:1.8rem;font-weight:700;margin-bottom:12px;}
.section-sub{font-size:1.05rem;color:var(--text-weak);max-width:640px;margin-bottom:32px;line-height:1.5;}
.text-center{text-align:center;}
.mx-auto{margin-left:auto;margin-right:auto;}
header{background:#fff;box-shadow:0 1px 4px rgba(0,0,0,0.04);position:sticky;top:0;z-index:100;}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;}
.logo{display:flex;align-items:center;gap:10px;font-size:1.35rem;font-weight:700;color:var(--primary);}
.logo-icon{width:34px;height:34px;background:var(--primary);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;}
.logo span{color:var(--text);}
nav{display:flex;align-items:center;gap:8px;}
nav a{padding:8px 18px;border-radius:var(--radius-sm);color:var(--text-weak);font-weight:500;font-size:0.95rem;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;}
.header-actions{display:flex;align-items:center;gap:14px;}
.search-box{display:flex;align-items:center;background:var(--bg);border-radius:40px;padding:0 16px;border:1px solid var(--border);}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(14,124,158,0.12);}
.search-box input{border:none;background:transparent;padding:8px 10px;outline:none;width:160px;font-size:0.9rem;color:var(--text);}
.search-box input::placeholder{color:var(--text-weak);}
.search-box button{background:none;border:none;color:var(--text-weak);cursor:pointer;padding:6px 0;font-size:1rem;}
.btn-cta{background:var(--primary);color:#fff;border:none;padding:10px 26px;border-radius:40px;font-weight:600;font-size:0.95rem;cursor:pointer;transition:var(--transition);}
.btn-cta:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 6px 20px rgba(14,124,158,0.25);color:#fff;}
.btn-cta-secondary{background:var(--secondary);color:#1a2a3a;}
.btn-cta-secondary:hover{background:#e0960f;color:#1a2a3a;box-shadow:0 6px 20px rgba(245,166,35,0.3);}
.menu-toggle{display:none;background:none;border:none;font-size:1.5rem;color:var(--text);cursor:pointer;padding:6px;}
.cat-banner{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);padding:56px 0;color:#fff;position:relative;overflow:hidden;}
.cat-banner-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:0.12;}
.cat-banner-content{position:relative;z-index:2;}
.cat-banner h1{font-size:2.4rem;font-weight:800;margin-bottom:10px;}
.cat-banner p{font-size:1.1rem;opacity:0.9;max-width:620px;}
.tags-filter{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px;}
.tag{padding:6px 20px;border-radius:40px;font-size:0.85rem;font-weight:500;background:var(--bg-card);border:1px solid var(--border);color:var(--text-weak);cursor:pointer;transition:var(--transition);}
.tag:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light);}
.tag.active{background:var(--primary);color:#fff;border-color:var(--primary);}
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.cat-card{background:var(--bg-card);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:var(--transition);display:flex;flex-direction:column;}
.cat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);}
.cat-card-img{height:180px;background-size:cover;background-position:center;}
.cat-card-body{padding:18px 20px 22px;flex:1;display:flex;flex-direction:column;}
.cat-card-body .meta{display:flex;gap:12px;font-size:0.8rem;color:var(--text-weak);margin-bottom:6px;}
.cat-card-body .meta .cat-tag{background:var(--primary-light);color:var(--primary);padding:2px 12px;border-radius:40px;font-weight:500;}
.cat-card-body h3{font-size:1.1rem;font-weight:700;margin-bottom:6px;line-height:1.4;}
.cat-card-body p{color:var(--text-weak);font-size:0.9rem;line-height:1.5;flex:1;}
.cat-card-body .read-link{margin-top:12px;color:var(--primary);font-weight:600;font-size:0.9rem;}
.cat-empty{grid-column:1/-1;text-align:center;padding:48px 20px;color:var(--text-weak);background:var(--bg-card);border-radius:var(--radius-md);border:1px dashed var(--border);}
.cat-cta{background:var(--bg-card);border-radius:var(--radius-md);padding:48px;text-align:center;border:1px solid var(--border);}
.cat-cta h3{font-size:1.4rem;font-weight:700;margin-bottom:8px;}
.cat-cta p{color:var(--text-weak);margin-bottom:20px;}
footer{background:#0f1a2a;color:rgba(255,255,255,0.7);padding:40px 0 20px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:28px;}
.footer-brand .logo{color:#fff;margin-bottom:10px;}
.footer-brand .logo span{color:#fff;}
.footer-brand p{font-size:0.85rem;line-height:1.6;max-width:320px;}
.footer-col h4{color:#fff;font-size:0.95rem;font-weight:600;margin-bottom:12px;}
.footer-col a{display:block;color:rgba(255,255,255,0.6);font-size:0.85rem;padding:3px 0;transition:var(--transition);}
.footer-col a:hover{color:var(--secondary);}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:16px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:0.8rem;color:rgba(255,255,255,0.45);}
@media(max-width:1024px){.cat-grid{grid-template-columns:repeat(2,1fr);}.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:768px){
.header-inner{height:60px;}
nav{display:none;position:absolute;top:60px;left:0;right:0;background:#fff;flex-direction:column;padding:12px 20px 20px;box-shadow:0 8px 24px rgba(0,0,0,0.08);border-top:1px solid var(--border);}
nav.open{display:flex;}
nav a{padding:10px 16px;width:100%;}
.menu-toggle{display:block;}
.search-box input{width:120px;}
.cat-banner h1{font-size:1.7rem;}
.cat-grid{grid-template-columns:1fr;}
.footer-grid{grid-template-columns:1fr;}
.header-actions .btn-cta{display:none;}
.cat-cta{padding:32px 20px;}
}
@media(max-width:520px){
.container{padding:0 14px;}
.cat-banner h1{font-size:1.4rem;}
.section-title{font-size:1.4rem;}
}

/* roulang page: article */
:root {
            --primary: #1e3c72;
            --primary-light: #2a5298;
            --primary-dark: #0f1f3d;
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #06b6d4;
            --bg-light: #f8fafc;
            --bg-warm: #f1f5f9;
            --text-dark: #0f172a;
            --text-body: #334155;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: '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;
            -webkit-text-size-adjust: 100%;
        }

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

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        /* Header / Nav */
        header {
            background: #ffffff;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            background: rgba(255, 255, 255, 0.96);
        }

        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: -0.02em;
        }

        .logo .logo-icon {
            font-size: 1.8rem;
            line-height: 1;
        }

        .logo span {
            color: var(--secondary);
        }

        #mainNav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        #mainNav a {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
            position: relative;
        }

        #mainNav a:hover {
            color: var(--primary);
            background: rgba(30, 60, 114, 0.06);
        }

        #mainNav a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 2px 12px rgba(30, 60, 114, 0.25);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-warm);
            border-radius: 40px;
            padding: 0 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(30, 60, 114, 0.1);
            background: #fff;
        }
        .search-box input {
            border: none;
            background: transparent;
            padding: 8px 8px 8px 4px;
            width: 140px;
            font-size: 0.9rem;
            color: var(--text-dark);
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }
        .search-box i {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .btn-cta {
            background: var(--secondary);
            color: #1e293b;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            box-shadow: 0 2px 12px rgba(245, 158, 11, 0.3);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .btn-cta:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
            color: #1e293b;
        }

        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            padding: 4px 8px;
            border-radius: 8px;
            background: var(--bg-warm);
        }
        .mobile-toggle:hover {
            background: var(--border);
        }

        /* Article Hero Banner */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            overflow: hidden;
        }

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

        .article-banner .container {
            position: relative;
            z-index: 2;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: var(--transition);
        }
        .article-breadcrumb a:hover {
            color: var(--secondary);
        }
        .article-breadcrumb .sep {
            color: rgba(255, 255, 255, 0.4);
        }
        .article-breadcrumb .current {
            color: var(--secondary);
            font-weight: 500;
        }

        .article-category-badge {
            display: inline-block;
            background: rgba(245, 158, 11, 0.2);
            color: var(--secondary-light);
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(245, 158, 11, 0.3);
            margin-bottom: 16px;
        }

        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            max-width: 900px;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.95rem;
        }
        .article-meta i {
            margin-right: 6px;
            opacity: 0.7;
        }
        .article-meta span {
            display: flex;
            align-items: center;
        }

        /* Main Content */
        .article-main {
            padding: 60px 0 80px;
        }

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

        .article-content {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 40px 44px;
            border: 1px solid var(--border-light);
        }

        .article-content .content-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-body);
        }

        .article-content .content-body p {
            margin-bottom: 1.4em;
        }

        .article-content .content-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-top: 2em;
            margin-bottom: 0.7em;
            padding-bottom: 0.3em;
            border-bottom: 2px solid var(--border);
        }

        .article-content .content-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-top: 1.6em;
            margin-bottom: 0.5em;
        }

        .article-content .content-body ul,
        .article-content .content-body ol {
            margin-bottom: 1.4em;
            padding-left: 1.5em;
        }
        .article-content .content-body li {
            margin-bottom: 0.4em;
        }
        .article-content .content-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content .content-body a:hover {
            color: var(--secondary);
        }

        .article-content .content-body img {
            border-radius: var(--radius-md);
            margin: 1.8em 0;
            box-shadow: var(--shadow-sm);
        }

        .article-content .content-body blockquote {
            border-left: 4px solid var(--secondary);
            background: var(--bg-warm);
            padding: 16px 24px;
            margin: 1.6em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
            font-style: italic;
        }

        .article-content .content-body .tag {
            display: inline-block;
            background: var(--bg-warm);
            padding: 2px 14px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: var(--text-muted);
            border: 1px solid var(--border);
            margin: 0 4px 4px 0;
        }

        .article-footer-meta {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-tags .tag {
            background: var(--bg-warm);
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: var(--text-muted);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(30, 60, 114, 0.04);
        }

        .article-share {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .article-share span {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-share a {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--bg-warm);
            color: var(--text-muted);
            border: 1px solid var(--border);
            transition: var(--transition);
            font-size: 1rem;
        }
        .article-share a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

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

        .sidebar-card {
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
        }

        .sidebar-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card h3 i {
            color: var(--secondary);
        }

        .sidebar-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .sidebar-list li a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.95rem;
            color: var(--text-body);
            transition: var(--transition);
        }
        .sidebar-list li:last-child a {
            border-bottom: none;
        }
        .sidebar-list li a:hover {
            color: var(--primary);
            padding-left: 6px;
        }
        .sidebar-list li a .num {
            color: var(--text-light);
            font-weight: 500;
            min-width: 24px;
            font-size: 0.85rem;
        }

        .sidebar-categories {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .sidebar-categories a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            background: var(--bg-warm);
            color: var(--text-body);
            font-size: 0.95rem;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .sidebar-categories a:hover {
            background: rgba(30, 60, 114, 0.06);
            border-color: var(--border);
            color: var(--primary);
        }
        .sidebar-categories a .count {
            background: var(--border);
            padding: 0 10px;
            border-radius: 40px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            padding: 32px 24px;
            border-radius: var(--radius-md);
            text-align: center;
        }
        .sidebar-cta h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .sidebar-cta p {
            font-size: 0.95rem;
            opacity: 0.85;
            margin-bottom: 20px;
        }
        .sidebar-cta .btn-light {
            background: #fff;
            color: var(--primary);
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            display: inline-block;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
        }
        .sidebar-cta .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
            color: var(--primary-dark);
        }

        /* Related Posts */
        .related-section {
            padding: 60px 0;
            background: var(--bg-warm);
        }

        .related-section .section-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-dark);
            text-align: center;
            margin-bottom: 12px;
        }
        .related-section .section-sub {
            text-align: center;
            color: var(--text-muted);
            margin-bottom: 40px;
            font-size: 1.05rem;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .related-card {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .related-card .card-img {
            height: 180px;
            background: var(--bg-warm);
            overflow: hidden;
            position: relative;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .related-card:hover .card-img img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 20px 22px;
        }
        .related-card .card-body .cat-tag {
            display: inline-block;
            background: rgba(30, 60, 114, 0.08);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
            margin-bottom: 10px;
        }
        .related-card .card-body h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .meta {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: 12px;
            display: flex;
            gap: 16px;
        }

        /* CTA Section */
        .article-cta {
            padding: 60px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            text-align: center;
        }
        .article-cta h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .article-cta p {
            font-size: 1.1rem;
            opacity: 0.85;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .article-cta .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .article-cta .btn-white {
            background: #fff;
            color: var(--primary);
            padding: 14px 36px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .article-cta .btn-white:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
            color: var(--primary-dark);
        }
        .article-cta .btn-outline-white {
            background: transparent;
            color: #fff;
            padding: 14px 36px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.4);
            transition: var(--transition);
        }
        .article-cta .btn-outline-white:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }

        /* Footer */
        footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
        }

        footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        footer .footer-brand .logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 16px;
        }
        footer .footer-brand .logo span {
            color: var(--secondary);
        }
        footer .footer-brand p {
            font-size: 0.95rem;
            line-height: 1.7;
            opacity: 0.7;
            max-width: 320px;
        }

        footer .footer-col h4 {
            color: #fff;
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        footer .footer-col a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }

        footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            opacity: 0.6;
        }

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

        @media (max-width: 768px) {
            header .container {
                height: 64px;
            }
            .search-box {
                display: none;
            }
            #mainNav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 20px 24px;
                gap: 8px;
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 2px solid var(--border);
                z-index: 99;
            }
            #mainNav.open {
                transform: translateY(0);
                opacity: 1;
            }
            #mainNav a {
                width: 100%;
                padding: 12px 18px;
                border-radius: 12px;
            }
            #mainNav a.active {
                background: var(--primary);
                color: #fff;
            }
            .mobile-toggle {
                display: block;
            }
            .btn-cta {
                padding: 8px 18px;
                font-size: 0.85rem;
            }
            .btn-cta span {
                display: none;
            }

            .article-banner {
                padding: 48px 0 40px;
            }
            .article-banner h1 {
                font-size: 1.8rem;
            }
            .article-content {
                padding: 24px 20px;
            }
            .article-content .content-body {
                font-size: 1rem;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-cta h2 {
                font-size: 1.5rem;
            }
            footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .article-footer-meta {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-banner h1 {
                font-size: 1.4rem;
            }
            .article-meta {
                font-size: 0.85rem;
                gap: 12px;
            }
            .article-content {
                padding: 16px 14px;
                border-radius: var(--radius-md);
            }
            .sidebar-card {
                padding: 20px 16px;
            }
            .article-cta .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .article-cta .btn-white,
            .article-cta .btn-outline-white {
                width: 100%;
                max-width: 280px;
            }
        }

        /* Not found state */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found-box .icon {
            font-size: 4rem;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            color: var(--text-dark);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .not-found-box .btn-back {
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border-radius: 40px;
            font-weight: 600;
            display: inline-block;
            transition: var(--transition);
        }
        .not-found-box .btn-back:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a56db;
            --primary-dark: #1243af;
            --primary-light: #e8f0fe;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --accent: #10b981;
            --bg-body: #f9fafb;
            --bg-white: #ffffff;
            --bg-soft: #f0f4ff;
            --text-dark: #0f172a;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.12);
            --transition: all 0.25s ease;
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg-body);
            -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, a:focus { color: var(--primary-dark); }
        a:focus-visible { outline: 3px solid var(--secondary); outline-offset: 2px; border-radius: 4px; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text-dark); font-weight: 700; }
        h1 { font-size: 2.6rem; }
        h2 { font-size: 2rem; margin-bottom: 0.5rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; color: var(--text-main); }
        p:last-child { margin-bottom: 0; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow { max-width: 880px; }
        section { padding: 5rem 0; }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 { position: relative; display: inline-block; }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            max-width: 600px;
            margin: 1rem auto 0;
            color: var(--text-muted);
            font-size: 1.05rem;
        }
        .text-center { text-align: center; }
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
            letter-spacing: 0.3px;
        }
        .tag-secondary { background: #fef3c7; color: #b45309; }
        .tag-accent { background: #d1fae5; color: #047857; }

        /* ===== Header & Navigation ===== */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
            transition: var(--transition);
        }
        header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .logo .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), #3b82f6);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            box-shadow: 0 2px 8px rgba(26,86,219,0.25);
        }
        .logo .brand-highlight { color: var(--primary); }
        .logo a { color: inherit; }
        .logo a:hover { color: inherit; }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition);
            position: relative;
        }
        .nav-main a:hover { background: var(--bg-soft); color: var(--primary); }
        .nav-main a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 2px 10px rgba(26,86,219,0.30);
        }
        .nav-main a.active:hover { background: var(--primary-dark); }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-soft);
            border-radius: 30px;
            padding: 0 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,86,219,0.10); background: #fff; }
        .search-box i { color: var(--text-light); font-size: 0.9rem; }
        .search-box input {
            border: none;
            background: transparent;
            padding: 8px 10px;
            font-size: 0.9rem;
            width: 140px;
            outline: none;
            color: var(--text-main);
        }
        .search-box input::placeholder { color: var(--text-light); }
        .btn-cta-nav {
            padding: 9px 24px;
            background: linear-gradient(135deg, var(--secondary), #f59e0b);
            color: #fff;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            box-shadow: 0 2px 8px rgba(245,158,11,0.30);
            white-space: nowrap;
        }
        .btn-cta-nav:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(245,158,11,0.35); color: #fff; }
        .mobile-toggle { display: none; font-size: 1.5rem; color: var(--text-dark); padding: 6px; }

        /* ===== Hero / Banner ===== */
        .hero-banner {
            margin-top: var(--header-height);
            min-height: 420px;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 60%, #1a56db 100%);
            overflow: hidden;
        }
        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.20;
            mix-blend-mode: overlay;
        }
        .hero-banner .container { position: relative; z-index: 2; }
        .hero-banner-content { max-width: 700px; padding: 3.5rem 0; }
        .hero-banner-content .tag { margin-bottom: 1rem; background: rgba(255,255,255,0.15); color: #fff; border: 1px solid rgba(255,255,255,0.2); }
        .hero-banner-content h1 {
            font-size: 3rem;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 1rem;
            font-weight: 800;
        }
        .hero-banner-content h1 span { color: var(--secondary); }
        .hero-banner-content p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.85);
            max-width: 580px;
            margin-bottom: 2rem;
        }
        .hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; }
        .btn-primary {
            padding: 14px 34px;
            background: var(--secondary);
            color: #fff;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1rem;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(245,158,11,0.35);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(245,158,11,0.40); color: #fff; }
        .btn-outline-light {
            padding: 13px 32px;
            background: transparent;
            color: #fff;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255,255,255,0.5);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-outline-light:hover { background: rgba(255,255,255,0.12); border-color: #fff; color: #fff; transform: translateY(-2px); }

        /* ===== Intro Section ===== */
        .intro-section { background: var(--bg-white); }
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4/3;
            background: var(--bg-soft);
        }
        .intro-image img { width: 100%; height: 100%; object-fit: cover; }
        .intro-text h2 { margin-bottom: 0.5rem; }
        .intro-text h2 span { color: var(--primary); }
        .intro-text p { color: var(--text-muted); font-size: 1.02rem; }
        .intro-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1.8rem; }
        .stat-item { text-align: center; padding: 1rem; background: var(--bg-soft); border-radius: var(--radius-md); }
        .stat-item .num { font-size: 1.8rem; font-weight: 800; color: var(--primary); }
        .stat-item .label { font-size: 0.85rem; color: var(--text-muted); margin-top: 2px; }

        /* ===== Categories / Cards ===== */
        .categories-section { background: var(--bg-body); }
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .cat-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }
        .cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
        .cat-card-img {
            height: 180px;
            overflow: hidden;
            background: var(--bg-soft);
            position: relative;
        }
        .cat-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .cat-card:hover .cat-card-img img { transform: scale(1.05); }
        .cat-card-img .overlay-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(15,23,42,0.70);
            backdrop-filter: blur(4px);
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .cat-card-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
        .cat-card-body h3 { font-size: 1.2rem; margin-bottom: 0.5rem; }
        .cat-card-body p { font-size: 0.92rem; color: var(--text-muted); flex: 1; }
        .cat-card-footer { padding: 0 1.5rem 1.5rem; display: flex; align-items: center; justify-content: space-between; }
        .cat-card-footer .btn-sm {
            padding: 8px 20px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .cat-card-footer .btn-sm:hover { background: var(--primary); color: #fff; }
        .cat-card-footer .meta { font-size: 0.82rem; color: var(--text-light); }

        /* ===== Stats / Data Section ===== */
        .data-section {
            background: linear-gradient(135deg, #0f172a, #1e3a5f);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .data-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .data-section .container { position: relative; z-index: 2; }
        .data-section .section-title h2 { color: #fff; }
        .data-section .section-title h2::after { background: var(--secondary); }
        .data-section .section-title p { color: rgba(255,255,255,0.7); }
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 2rem;
        }
        .data-card {
            text-align: center;
            padding: 2rem 1rem;
            background: rgba(255,255,255,0.07);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.08);
            backdrop-filter: blur(4px);
            transition: var(--transition);
        }
        .data-card:hover { background: rgba(255,255,255,0.12); transform: translateY(-4px); }
        .data-card .icon { font-size: 2.2rem; color: var(--secondary); margin-bottom: 0.8rem; }
        .data-card .num { font-size: 2.4rem; font-weight: 800; color: #fff; line-height: 1.2; }
        .data-card .label { font-size: 0.92rem; color: rgba(255,255,255,0.7); margin-top: 4px; }

        /* ===== Guide List Section ===== */
        .guide-section { background: var(--bg-white); }
        .guide-list { display: flex; flex-direction: column; gap: 16px; }
        .guide-item {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            padding: 1.2rem 1.5rem;
            background: var(--bg-body);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .guide-item:hover { border-color: var(--primary); box-shadow: var(--shadow-sm); transform: translateX(4px); }
        .guide-item .num-badge {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .guide-item .num-badge.top { background: var(--secondary); color: #fff; }
        .guide-item .info { flex: 1; }
        .guide-item .info h4 { font-size: 1.05rem; margin-bottom: 2px; }
        .guide-item .info p { font-size: 0.88rem; color: var(--text-muted); margin: 0; }
        .guide-item .tag { flex-shrink: 0; }

        /* ===== FAQ Section ===== */
        .faq-section { background: var(--bg-soft); }
        .faq-grid { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary); box-shadow: var(--shadow-sm); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 1.5rem;
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--text-dark);
            cursor: pointer;
            transition: var(--transition);
            gap: 1rem;
        }
        .faq-question i { color: var(--primary); transition: transform 0.3s ease; font-size: 0.9rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), #3b82f6);
            text-align: center;
            padding: 4.5rem 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 { color: #fff; font-size: 2.2rem; margin-bottom: 0.8rem; }
        .cta-section p { color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 2rem; font-size: 1.05rem; }
        .cta-section .btn-primary { background: #fff; color: var(--primary); box-shadow: 0 4px 16px rgba(0,0,0,0.15); }
        .cta-section .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 28px rgba(0,0,0,0.20); color: var(--primary-dark); }
        .cta-section .btn-outline-light { border-color: rgba(255,255,255,0.4); }
        .cta-section .btn-outline-light:hover { background: rgba(255,255,255,0.10); }

        /* ===== Footer ===== */
        footer {
            background: #0f172a;
            color: rgba(255,255,255,0.7);
            padding: 3.5rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 1rem; }
        .footer-brand .logo .brand-highlight { color: var(--secondary); }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); max-width: 320px; line-height: 1.7; }
        .footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 1rem; font-weight: 600; }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--secondary); transform: translateX(4px); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .cat-grid { grid-template-columns: repeat(2, 1fr); }
            .data-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .hero-banner-content h1 { font-size: 2.2rem; }
            .hero-banner { min-height: 340px; }
            .hero-banner-content { padding: 2.5rem 0; }
            .intro-grid { grid-template-columns: 1fr; gap: 2rem; }
            .intro-image { aspect-ratio: 16/9; }
            .intro-stats { grid-template-columns: repeat(3, 1fr); }
            .cat-grid { grid-template-columns: 1fr; }
            .data-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .guide-item { flex-wrap: wrap; gap: 0.8rem; }
            .guide-item .tag { width: auto; }
            .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .nav-main { display: none; }
            .mobile-toggle { display: block; }
            .nav-main.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                padding: 1rem 24px 1.5rem;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                gap: 4px;
            }
            .nav-main.open a { width: 100%; text-align: center; padding: 12px; }
            .search-box input { width: 100px; }
            .btn-cta-nav { padding: 8px 16px; font-size: 0.82rem; }
            section { padding: 3.5rem 0; }
            .hero-buttons .btn-outline-light { display: none; }
            .data-card .num { font-size: 1.8rem; }
            .stat-item .num { font-size: 1.4rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-banner-content h1 { font-size: 1.7rem; }
            .hero-banner-content p { font-size: 0.95rem; }
            .btn-primary { padding: 12px 24px; font-size: 0.9rem; }
            .intro-stats { grid-template-columns: repeat(3, 1fr); gap: 8px; }
            .stat-item { padding: 0.7rem 0.3rem; }
            .stat-item .num { font-size: 1.2rem; }
            .data-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .data-card { padding: 1.2rem 0.8rem; }
            .data-card .num { font-size: 1.5rem; }
            .faq-question { font-size: 0.92rem; padding: 1rem 1.2rem; }
            .faq-answer { padding: 0 1.2rem 1rem; }
            .guide-item { padding: 1rem 1.2rem; }
            .guide-item .num-badge { width: 32px; height: 32px; font-size: 0.9rem; }
            .logo { font-size: 1.2rem; }
            .logo .logo-icon { width: 34px; height: 34px; font-size: 1rem; }
            .cta-section h2 { font-size: 1.5rem; }
            .section-title p { font-size: 0.92rem; }
        }
        @media (max-width: 380px) {
            .search-box { display: none; }
            .hero-buttons .btn-primary { width: 100%; justify-content: center; }
        }

        /* ===== Utilities ===== */
        .mt-1 { margin-top: 1rem; }
        .mb-1 { margin-bottom: 1rem; }
        .gap-1 { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* Skeleton / fallback for images */
        .img-placeholder {
            background: linear-gradient(135deg, var(--border-light), var(--border));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 2rem;
        }