/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --primary: #2d8a4e;
  --primary-dark: #1e6b36;
  --primary-light: #4caf6e;
  --primary-gradient: linear-gradient(135deg, #2d8a4e 0%, #1e6b36 100%);
  --accent: #f5a623;
  --accent-dark: #d4891a;
  --accent-light: #fce4b8;
  --bg: #f8faf9;
  --bg-alt: #ffffff;
  --bg-dark: #0f1a13;
  --text: #1a2e1f;
  --text-light: #6b7a6f;
  --text-white: #f0f7f2;
  --border: #dce4de;
  --border-light: #eef2ef;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 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-font-smoothing: antialiased; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
ul, ol { list-style: none; }
input, textarea { font-family: inherit; font-size: inherit; }

/* ===== Container ===== */
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 16px; } }

/* ===== Header & Navigation ===== */
.header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light); height: var(--header-height);
  transition: background var(--transition), box-shadow var(--transition);
}
.header.scrolled { background: rgba(255,255,255,0.98); box-shadow: var(--shadow); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.header-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.header-logo .logo-icon {
  width: 36px; height: 36px; background: var(--primary-gradient); border-radius: 50%;
  display: flex; align-items: center; justify-content: center; color: white; font-size: 18px;
  box-shadow: 0 2px 12px rgba(45,138,78,0.3);
}
.header-logo .logo-text { font-size: 20px; font-weight: 700; color: var(--text); letter-spacing: -0.3px; }
.header-logo .logo-text span { color: var(--primary); }
.header-nav { display: flex; align-items: center; gap: 4px; }
.header-nav a {
  padding: 8px 20px; border-radius: 100px; font-size: 14px; font-weight: 500;
  color: var(--text-light); transition: all var(--transition); position: relative;
}
.header-nav a:hover { color: var(--primary); background: rgba(45,138,78,0.08); }
.header-nav a.active { color: white; background: var(--primary-gradient); box-shadow: 0 4px 14px rgba(45,138,78,0.3); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.header-actions .search-btn {
  width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  color: var(--text-light); background: var(--border-light); transition: all var(--transition); font-size: 16px;
}
.header-actions .search-btn:hover { background: var(--primary); color: white; }
.header-actions .cta-btn {
  padding: 10px 24px; border-radius: 100px; font-size: 14px; font-weight: 600;
  background: var(--primary-gradient); color: white; box-shadow: 0 4px 16px rgba(45,138,78,0.3);
  transition: all var(--transition); display: flex; align-items: center; gap: 8px;
}
.header-actions .cta-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(45,138,78,0.4); }
.mobile-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; font-size: 22px; color: var(--text); cursor: pointer; border-radius: 8px; transition: background var(--transition); }
.mobile-toggle:hover { background: var(--border-light); }
@media (max-width: 768px) {
  .header-nav { display: none; position: absolute; top: var(--header-height); left: 0; width: 100%; background: white; flex-direction: column; padding: 16px 24px 24px; gap: 6px; box-shadow: var(--shadow-lg); border-bottom: 1px solid var(--border-light); }
  .header-nav.open { display: flex; }
  .header-nav a { width: 100%; padding: 12px 20px; font-size: 16px; }
  .mobile-toggle { display: flex; }
  .header-actions .cta-btn span { display: none; }
  .header-actions .cta-btn { padding: 10px 16px; }
}

/* ===== Hero Section ===== */
.hero {
  position: relative; min-height: 92vh; display: flex; align-items: center;
  background: linear-gradient(135deg, #0f1a13 0%, #1a2e1f 50%, #0f1a13 100%);
  overflow: hidden; margin-top: var(--header-height);
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover; background-position: center; background-repeat: no-repeat;
  opacity: 0.3; transform: scale(1.05); animation: heroZoom 20s ease-in-out infinite alternate;
}
@keyframes heroZoom { 0% { transform: scale(1.05); } 100% { transform: scale(1.15); } }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15,26,19,0.88) 0%, rgba(26,46,31,0.7) 50%, rgba(15,26,19,0.85) 100%); z-index: 1; }
.hero-content { position: relative; z-index: 2; padding: 80px 0; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px; background: rgba(45,138,78,0.2); color: var(--primary-light);
  padding: 6px 18px; border-radius: 100px; font-size: 13px; font-weight: 500; letter-spacing: 0.3px;
  border: 1px solid rgba(45,138,78,0.25); margin-bottom: 24px;
}
.hero-tag i { font-size: 12px; }
.hero-title {
  font-size: clamp(36px, 6vw, 68px); font-weight: 800; line-height: 1.1; color: white;
  letter-spacing: -1.5px; max-width: 800px; margin-bottom: 20px;
}
.hero-title span { background: linear-gradient(135deg, #4caf6e, #f5a623); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc {
  font-size: 18px; line-height: 1.7; color: rgba(255,255,255,0.75); max-width: 600px;
  margin-bottom: 36px; font-weight: 400;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.hero-actions .btn-primary {
  padding: 16px 36px; border-radius: 100px; font-size: 16px; font-weight: 600;
  background: var(--primary-gradient); color: white; box-shadow: 0 8px 30px rgba(45,138,78,0.35);
  transition: all var(--transition); display: inline-flex; align-items: center; gap: 10px;
}
.hero-actions .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(45,138,78,0.5); }
.hero-actions .btn-secondary {
  padding: 16px 36px; border-radius: 100px; font-size: 16px; font-weight: 600;
  background: rgba(255,255,255,0.1); color: white; border: 1px solid rgba(255,255,255,0.2);
  transition: all var(--transition); display: inline-flex; align-items: center; gap: 10px;
}
.hero-actions .btn-secondary:hover { background: rgba(255,255,255,0.18); border-color: rgba(255,255,255,0.35); }
.hero-stats { display: flex; flex-wrap: wrap; gap: 40px; margin-top: 60px; padding-top: 40px; border-top: 1px solid rgba(255,255,255,0.1); }
.hero-stat-item { text-align: left; }
.hero-stat-item .num { font-size: 32px; font-weight: 800; color: white; line-height: 1.2; }
.hero-stat-item .num span { color: var(--accent); }
.hero-stat-item .label { font-size: 14px; color: rgba(255,255,255,0.6); margin-top: 4px; }
@media (max-width: 768px) {
  .hero { min-height: 80vh; }
  .hero-content { padding: 60px 0; }
  .hero-desc { font-size: 16px; }
  .hero-stats { gap: 24px; margin-top: 40px; padding-top: 30px; }
  .hero-stat-item .num { font-size: 26px; }
}

/* ===== Section Common ===== */
.section { padding: 90px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: white; }
.section-header { text-align: center; max-width: 700px; margin: 0 auto 56px; }
.section-header .label {
  display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600;
  color: var(--primary); text-transform: uppercase; letter-spacing: 1.2px; margin-bottom: 12px;
}
.section-header .label::before, .section-header .label::after { content: ''; width: 24px; height: 2px; background: var(--primary); border-radius: 2px; }
.section-header .label::after { background: var(--accent); }
.section-header h2 { font-size: clamp(28px, 3.5vw, 42px); font-weight: 800; line-height: 1.2; letter-spacing: -0.5px; color: var(--text); }
.section-dark .section-header h2 { color: white; }
.section-header p { font-size: 16px; color: var(--text-light); margin-top: 16px; line-height: 1.7; }
.section-dark .section-header p { color: rgba(255,255,255,0.7); }
@media (max-width: 768px) { .section { padding: 60px 0; } .section-header { margin-bottom: 40px; } }

/* ===== Intro Section ===== */
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.intro-image { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.intro-image img { width: 100%; height: 420px; object-fit: cover; transition: transform 0.6s ease; }
.intro-image:hover img { transform: scale(1.03); }
.intro-image::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(15,26,19,0.4), transparent); }
.intro-text h3 { font-size: 28px; font-weight: 700; margin-bottom: 20px; color: var(--text); }
.intro-text p { font-size: 16px; color: var(--text-light); line-height: 1.8; margin-bottom: 16px; }
.intro-features { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.intro-feature-item { display: flex; align-items: center; gap: 12px; padding: 12px 16px; background: var(--border-light); border-radius: var(--radius-sm); transition: all var(--transition); }
.intro-feature-item:hover { background: var(--primary); color: white; transform: translateX(4px); }
.intro-feature-item i { font-size: 18px; color: var(--primary); width: 24px; text-align: center; }
.intro-feature-item:hover i { color: white; }
.intro-feature-item span { font-size: 14px; font-weight: 500; }
@media (max-width: 768px) { .intro-grid { grid-template-columns: 1fr; gap: 32px; } .intro-image img { height: 280px; } .intro-features { grid-template-columns: 1fr; } }

/* ===== Categories / Tabs ===== */
.categories-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.category-card {
  position: relative; border-radius: var(--radius); overflow: hidden; background: white;
  box-shadow: var(--shadow-sm); transition: all var(--transition); cursor: pointer;
  border: 1px solid var(--border-light);
}
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.category-card .card-img { height: 200px; overflow: hidden; }
.category-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.category-card:hover .card-img img { transform: scale(1.08); }
.category-card .card-body { padding: 20px 24px 24px; }
.category-card .card-body .cat-tag {
  display: inline-block; padding: 4px 14px; border-radius: 100px; font-size: 12px; font-weight: 600;
  background: rgba(45,138,78,0.1); color: var(--primary); margin-bottom: 12px;
}
.category-card .card-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.category-card .card-body p { font-size: 14px; color: var(--text-light); line-height: 1.6; margin-bottom: 16px; }
.category-card .card-body .card-link {
  font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px;
  transition: gap var(--transition);
}
.category-card:hover .card-body .card-link { gap: 12px; }
.category-card .card-body .card-link i { font-size: 12px; }

/* ===== Latest Posts / CMS List ===== */
.posts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 28px; }
.post-card {
  background: white; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm);
  transition: all var(--transition); border: 1px solid var(--border-light);
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.post-card .post-img { height: 210px; overflow: hidden; position: relative; }
.post-card .post-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.post-card:hover .post-img img { transform: scale(1.06); }
.post-card .post-img .post-cat {
  position: absolute; top: 14px; left: 14px; padding: 4px 14px; border-radius: 100px;
  font-size: 12px; font-weight: 600; background: rgba(45,138,78,0.9); color: white; backdrop-filter: blur(4px);
}
.post-card .post-body { padding: 20px 24px 24px; }
.post-card .post-body .post-meta { display: flex; align-items: center; gap: 16px; font-size: 13px; color: var(--text-light); margin-bottom: 12px; }
.post-card .post-body .post-meta i { margin-right: 4px; }
.post-card .post-body h3 { font-size: 18px; font-weight: 700; line-height: 1.4; margin-bottom: 10px; color: var(--text); }
.post-card .post-body h3 a { color: inherit; }
.post-card .post-body h3 a:hover { color: var(--primary); }
.post-card .post-body p { font-size: 14px; color: var(--text-light); line-height: 1.7; margin-bottom: 16px; }
.post-card .post-body .read-more {
  font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px;
}
.post-card .post-body .read-more:hover { gap: 12px; }
.posts-empty { text-align: center; padding: 60px 20px; color: var(--text-light); font-size: 16px; background: var(--border-light); border-radius: var(--radius); }

/* ===== Stats / Data Section ===== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 32px; text-align: center; }
.stat-item { padding: 32px 20px; background: rgba(255,255,255,0.05); border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.08); backdrop-filter: blur(6px); transition: all var(--transition); }
.stat-item:hover { background: rgba(255,255,255,0.1); transform: translateY(-4px); }
.stat-item .stat-icon { font-size: 36px; color: var(--accent); margin-bottom: 16px; }
.stat-item .stat-num { font-size: 42px; font-weight: 800; color: white; line-height: 1.1; }
.stat-item .stat-num span { color: var(--accent); }
.stat-item .stat-label { font-size: 15px; color: rgba(255,255,255,0.65); margin-top: 8px; }

/* ===== Process / Steps ===== */
.process-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 32px; position: relative; }
.process-step { text-align: center; padding: 32px 20px; position: relative; }
.process-step .step-num {
  width: 60px; height: 60px; border-radius: 50%; background: var(--primary-gradient); color: white;
  font-size: 24px; font-weight: 800; display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px; box-shadow: 0 8px 24px rgba(45,138,78,0.3); position: relative; z-index: 2;
}
.process-step .step-num::after {
  content: ''; position: absolute; inset: -4px; border-radius: 50%; border: 2px dashed rgba(45,138,78,0.3);
  animation: spin 20s linear infinite;
}
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
.process-step h4 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.process-step p { font-size: 14px; color: var(--text-light); line-height: 1.6; max-width: 260px; margin: 0 auto; }
.process-step::not(:last-child)::before {
  content: ''; position: absolute; top: 45px; left: calc(50% + 50px); width: calc(100% - 100px);
  height: 2px; background: linear-gradient(to right, var(--primary-light), var(--border)); z-index: 0;
}
@media (max-width: 768px) { .process-step::before { display: none; } }

/* ===== Features / Highlights ===== */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 28px; }
.feature-card { background: white; border-radius: var(--radius); padding: 32px 28px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: all var(--transition); }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.feature-card .feat-icon { width: 52px; height: 52px; border-radius: var(--radius-sm); background: rgba(45,138,78,0.1); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 18px; transition: all var(--transition); }
.feature-card:hover .feat-icon { background: var(--primary-gradient); color: white; }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: white; border-radius: var(--radius-sm); border: 1px solid var(--border-light); overflow: hidden; transition: all var(--transition); }
.faq-item:hover { border-color: var(--primary-light); }
.faq-question { width: 100%; padding: 20px 24px; display: flex; align-items: center; justify-content: space-between; font-size: 16px; font-weight: 600; color: var(--text); text-align: left; background: none; transition: all var(--transition); }
.faq-question:hover { color: var(--primary); }
.faq-question i { font-size: 14px; color: var(--text-light); transition: transform var(--transition); }
.faq-item.active .faq-question { color: var(--primary); }
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease; padding: 0 24px; }
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 20px; }
.faq-answer p { font-size: 15px; color: var(--text-light); line-height: 1.8; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, #1a2e1f 0%, #0f1a13 100%); padding: 80px 0;
  position: relative; overflow: hidden;
}
.cta-section::before { content: ''; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; opacity: 0.08; }
.cta-content { position: relative; z-index: 2; text-align: center; max-width: 680px; margin: 0 auto; }
.cta-content h2 { font-size: clamp(28px, 3.5vw, 42px); font-weight: 800; color: white; line-height: 1.2; margin-bottom: 16px; }
.cta-content p { font-size: 16px; color: rgba(255,255,255,0.75); margin-bottom: 32px; line-height: 1.7; }
.cta-content .cta-btn-group { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.cta-content .btn-cta-primary {
  padding: 16px 40px; border-radius: 100px; font-size: 16px; font-weight: 600;
  background: linear-gradient(135deg, #f5a623, #d4891a); color: white;
  box-shadow: 0 8px 30px rgba(245,166,35,0.35); transition: all var(--transition);
  display: inline-flex; align-items: center; gap: 10px;
}
.cta-content .btn-cta-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(245,166,35,0.5); }
.cta-content .btn-cta-secondary {
  padding: 16px 40px; border-radius: 100px; font-size: 16px; font-weight: 600;
  background: rgba(255,255,255,0.1); color: white; border: 1px solid rgba(255,255,255,0.25);
  transition: all var(--transition); display: inline-flex; align-items: center; gap: 10px;
}
.cta-content .btn-cta-secondary:hover { background: rgba(255,255,255,0.18); border-color: rgba(255,255,255,0.4); }

/* ===== Footer ===== */
.footer { background: #0a120c; color: rgba(255,255,255,0.7); padding: 60px 0 30px; border-top: 1px solid rgba(255,255,255,0.05); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .footer-logo .logo-icon { width: 32px; height: 32px; background: var(--primary-gradient); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; font-size: 16px; }
.footer-brand .footer-logo .logo-text { font-size: 18px; font-weight: 700; color: white; }
.footer-brand .footer-logo .logo-text span { color: var(--primary-light); }
.footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 320px; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: white; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: rgba(255,255,255,0.55); transition: all var(--transition); display: inline-flex; align-items: center; gap: 6px; }
.footer-col ul li a:hover { color: var(--primary-light); transform: translateX(4px); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 24px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px; font-size: 13px; color: rgba(255,255,255,0.4); }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--primary-light); }
.footer-bottom .social-links { display: flex; gap: 12px; }
.footer-bottom .social-links 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(255,255,255,0.5); font-size: 16px; transition: all var(--transition); }
.footer-bottom .social-links a:hover { background: var(--primary); color: white; transform: translateY(-2px); }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } .footer-bottom { flex-direction: column; text-align: center; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed; bottom: 32px; right: 32px; z-index: 900; width: 48px; height: 48px;
  border-radius: 50%; background: var(--primary-gradient); color: white; font-size: 18px;
  display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 20px rgba(45,138,78,0.35);
  opacity: 0; visibility: hidden; transform: translateY(20px); transition: all var(--transition);
  cursor: pointer; border: none;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(45,138,78,0.5); }

/* ===== Responsive Helpers ===== */
@media (max-width: 1024px) { .intro-grid { gap: 40px; } }
@media (max-width: 768px) { .hero-title { font-size: 32px; } .hero-stats { gap: 20px; } .stats-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .hero-title { font-size: 28px; } .hero-actions .btn-primary, .hero-actions .btn-secondary { width: 100%; justify-content: center; } .stats-grid { grid-template-columns: 1fr; } .posts-grid { grid-template-columns: 1fr; } .categories-grid { grid-template-columns: 1fr; } .features-grid { grid-template-columns: 1fr; } }

/* ===== Additional Utilities ===== */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; } .mt-32 { margin-top: 32px; }
.mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; }
.gap-8 { gap: 8px; } .gap-12 { gap: 12px; } .gap-16 { gap: 16px; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: article */
/* ===== Design Variables ===== */
:root {
  --primary: #e8542a;
  --primary-light: #f0704a;
  --primary-dark: #c0401e;
  --secondary: #f5a623;
  --secondary-light: #f8c060;
  --accent: #2a8c6a;
  --bg-light: #faf8f6;
  --bg-white: #ffffff;
  --bg-dark: #1a1a2e;
  --bg-card: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #5a5a7a;
  --text-muted: #8a8aaa;
  --text-white: #ffffff;
  --border-light: #eae6e0;
  --border-medium: #d4cec4;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.07);
  --shadow-lg: 0 14px 40px rgba(0,0,0,0.10);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.14);
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --font-primary: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --container-max: 1200px;
  --header-height: 72px;
}

/* ===== 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-primary);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-light);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
a:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; border-radius: 4px; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea { font-family: inherit; font-size: 1rem; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }

/* ===== Container ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
}

/* ===== Header / Nav ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-md); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  flex-shrink: 0;
}
.logo:hover { color: var(--primary); }
.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  box-shadow: 0 2px 12px rgba(232,84,42,0.25);
}
.logo-text span { color: var(--primary); }
.header-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: nowrap;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.header-nav::-webkit-scrollbar { display: none; }
.header-nav a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 40px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: all var(--transition);
  background: transparent;
  border: 1px solid transparent;
}
.header-nav a i { font-size: 13px; }
.header-nav a:hover {
  color: var(--primary);
  background: rgba(232,84,42,0.06);
  border-color: rgba(232,84,42,0.12);
}
.header-nav a.active {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(232,84,42,0.30);
}
.header-nav a.active:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 22px;
  background: linear-gradient(135deg, var(--secondary), #f7b731);
  color: #fff !important;
  border-radius: 40px;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 4px 16px rgba(245,166,35,0.30);
  transition: all var(--transition);
  border: none !important;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(245,166,35,0.40);
  color: #fff !important;
}
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-light);
  color: var(--text-primary);
  font-size: 1.2rem;
  transition: background var(--transition);
}
.mobile-toggle:hover { background: var(--border-light); }
@media (max-width: 768px) {
  .header-nav { display: none; }
  .mobile-toggle { display: flex; }
  .header-nav.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(20px);
    padding: 16px 24px 24px;
    gap: 8px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-lg);
    align-items: stretch;
    overflow-x: visible;
  }
  .header-nav.open a {
    justify-content: center;
    padding: 12px 20px;
  }
  .header-inner { padding: 0 16px; }
}

/* ===== Hero Banner (Article) ===== */
.article-hero {
  margin-top: var(--header-height);
  position: relative;
  padding: 100px 0 80px;
  background: linear-gradient(135deg, #1a1a2e 0%, #2d2d4a 50%, #1a1a2e 100%);
  overflow: hidden;
  min-height: 320px;
  display: flex;
  align-items: center;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: 0.15;
  mix-blend-mode: overlay;
}
.article-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: linear-gradient(to top, var(--bg-light), transparent);
}
.article-hero .container {
  position: relative;
  z-index: 2;
  text-align: center;
}
.article-hero .breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.article-hero .breadcrumb a {
  color: rgba(255,255,255,0.7);
  transition: color var(--transition);
}
.article-hero .breadcrumb a:hover { color: #fff; }
.article-hero .breadcrumb .sep { color: rgba(255,255,255,0.35); }
.article-hero .breadcrumb .current { color: var(--secondary); }
.article-hero h1 {
  font-size: 2.6rem;
  color: #fff;
  max-width: 860px;
  margin: 0 auto 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
}
.article-hero .meta-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
}
.article-hero .meta-bar .tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(245,166,35,0.2);
  color: var(--secondary);
  border-radius: 40px;
  font-size: 0.8rem;
  font-weight: 600;
  backdrop-filter: blur(4px);
}
.article-hero .meta-bar i { margin-right: 6px; }
@media (max-width: 768px) {
  .article-hero { padding: 80px 0 60px; min-height: 260px; }
  .article-hero h1 { font-size: 1.6rem; }
  .article-hero .meta-bar { gap: 14px; font-size: 0.8rem; }
}

/* ===== Article Main ===== */
.article-main {
  padding: 50px 0 70px;
  background: var(--bg-light);
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 44px;
  align-items: start;
}
.article-content {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 40px 44px;
  border: 1px solid var(--border-light);
}
.article-content .featured-image {
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 32px;
  box-shadow: var(--shadow-sm);
}
.article-content .featured-image img {
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: cover;
}
.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-primary);
}
.article-body p {
  margin-bottom: 1.4em;
}
.article-body h2 {
  font-size: 1.5rem;
  margin-top: 2em;
  margin-bottom: 0.8em;
  padding-bottom: 0.5em;
  border-bottom: 2px solid var(--border-light);
}
.article-body h3 {
  font-size: 1.2rem;
  margin-top: 1.6em;
  margin-bottom: 0.6em;
}
.article-body ul, .article-body ol {
  margin-bottom: 1.4em;
  padding-left: 1.8em;
}
.article-body ul li {
  list-style: disc;
  margin-bottom: 0.4em;
}
.article-body ol li {
  list-style: decimal;
  margin-bottom: 0.4em;
}
.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(232,84,42,0.04);
  padding: 16px 24px;
  margin: 1.6em 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-style: italic;
}
.article-body img {
  border-radius: var(--radius-md);
  margin: 1.6em auto;
  box-shadow: var(--shadow-sm);
}
.article-body a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.article-body a:hover { color: var(--primary-dark); }
.article-footer-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid var(--border-light);
}
.article-footer-meta .tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.article-footer-meta .tags span {
  display: inline-block;
  padding: 4px 14px;
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: 40px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.article-footer-meta .share {
  display: flex;
  align-items: center;
  gap: 10px;
}
.article-footer-meta .share a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-light);
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
  transition: all var(--transition);
  font-size: 0.95rem;
}
.article-footer-meta .share a:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(232,84,42,0.25);
}
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .article-content { padding: 24px 20px; }
  .article-body { font-size: 1rem; }
  .article-body h2 { font-size: 1.3rem; }
  .article-footer-meta { flex-direction: column; align-items: flex-start; }
}

/* ===== Sidebar ===== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.sidebar-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}
.sidebar-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-card h3 i { color: var(--primary); }
.sidebar-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
}
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list a {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--text-primary);
  transition: color var(--transition);
}
.sidebar-list a:hover { color: var(--primary); }
.sidebar-list .thumb {
  width: 64px;
  height: 48px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
  background: var(--border-light);
}
.sidebar-list .info { flex: 1; min-width: 0; }
.sidebar-list .info .title {
  font-size: 0.9rem;
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.35;
}
.sidebar-list .info .date {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.sidebar-cta {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border: none;
  color: #fff;
  text-align: center;
}
.sidebar-cta h3 { color: #fff; border-bottom-color: rgba(255,255,255,0.2); }
.sidebar-cta h3 i { color: var(--secondary); }
.sidebar-cta p { font-size: 0.9rem; opacity: 0.9; margin-bottom: 18px; }
.sidebar-cta .btn {
  display: inline-block;
  padding: 12px 32px;
  background: #fff;
  color: var(--primary);
  border-radius: 40px;
  font-weight: 700;
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.sidebar-cta .btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.25);
  color: var(--primary-dark);
}

/* ===== Related / CTA Section ===== */
.related-section {
  padding: 60px 0 70px;
  background: var(--bg-white);
}
.related-section .section-title {
  text-align: center;
  margin-bottom: 40px;
}
.related-section .section-title h2 {
  font-size: 1.8rem;
  font-weight: 800;
}
.related-section .section-title p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-top: 8px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.related-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}
.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.related-card .card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: var(--border-light);
}
.related-card .card-body {
  padding: 22px 20px 24px;
}
.related-card .card-body .cat {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.related-card .card-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 8px 0 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card .card-body h3 a { color: var(--text-primary); }
.related-card .card-body h3 a:hover { color: var(--primary); }
.related-card .card-body p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}
.related-card .card-body .meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 14px;
}
@media (max-width: 992px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .related-grid { grid-template-columns: 1fr; }
  .related-section .section-title h2 { font-size: 1.4rem; }
}

/* ===== CTA Banner ===== */
.cta-banner {
  padding: 60px 0;
  background: linear-gradient(135deg, var(--bg-dark) 0%, #2d2d4a 100%);
  position: relative;
  overflow: hidden;
}
.cta-banner::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-banner .container {
  position: relative;
  z-index: 2;
  text-align: center;
}
.cta-banner h2 {
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.cta-banner p {
  color: rgba(255,255,255,0.75);
  font-size: 1.1rem;
  max-width: 580px;
  margin: 0 auto 28px;
}
.cta-banner .btn-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-banner .btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  background: linear-gradient(135deg, var(--secondary), #f7b731);
  color: #1a1a2e;
  border-radius: 40px;
  font-weight: 700;
  font-size: 1.05rem;
  transition: all var(--transition);
  box-shadow: 0 6px 24px rgba(245,166,35,0.35);
}
.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(245,166,35,0.45);
  color: #1a1a2e;
}
.cta-banner .btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 40px;
  font-weight: 600;
  font-size: 1.05rem;
  transition: all var(--transition);
}
.cta-banner .btn-outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.08);
  color: #fff;
}
@media (max-width: 768px) {
  .cta-banner h2 { font-size: 1.5rem; }
  .cta-banner p { font-size: 0.95rem; }
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.75);
  padding: 56px 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 .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand .footer-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
}
.footer-brand .footer-logo .logo-text span { color: var(--primary); }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 360px; color: rgba(255,255,255,0.6); }
.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 3px;
  background: var(--primary);
  border-radius: 4px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-col ul li a i { font-size: 10px; color: var(--primary); }
.footer-col ul li a:hover { color: #fff; padding-left: 4px; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}
.footer-bottom .social-links {
  display: flex;
  gap: 12px;
}
.footer-bottom .social-links a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.5);
  border: 1px solid rgba(255,255,255,0.08);
  transition: all var(--transition);
  font-size: 1rem;
}
.footer-bottom .social-links a:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
}
@media (max-width: 992px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== Not Found ===== */
.not-found-box {
  text-align: center;
  padding: 60px 20px;
}
.not-found-box .icon {
  font-size: 4rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.not-found-box h2 {
  font-size: 1.8rem;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.not-found-box p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.not-found-box .btn-home {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  border-radius: 40px;
  font-weight: 600;
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(232,84,42,0.30);
}
.not-found-box .btn-home:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(232,84,42,0.40);
  color: #fff;
}

/* ===== Utility ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #E87A2A;
            --primary-dark: #CC6822;
            --primary-light: #FDE8D6;
            --secondary: #2B9E6E;
            --secondary-light: #E2F3EC;
            --accent: #F5A623;
            --bg-body: #F8F6F3;
            --bg-white: #FFFFFF;
            --bg-dark: #2D2A26;
            --bg-card: #FFFFFF;
            --bg-section-alt: #F0ECE7;
            --text-primary: #2D2A26;
            --text-secondary: #6B6560;
            --text-light: #9E9792;
            --text-white: #FFFFFF;
            --border-color: #E5E0DB;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(45, 42, 38, 0.06);
            --shadow-md: 0 6px 24px rgba(45, 42, 38, 0.08);
            --shadow-lg: 0 16px 48px rgba(45, 42, 38, 0.12);
            --shadow-hover: 0 12px 36px rgba(232, 122, 42, 0.16);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Roboto, system-ui, -apple-system, sans-serif;
            --transition: 0.30s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --max-width: 1200px;
            --header-height: 72px;
            --spacing-section: 80px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            padding-top: var(--header-height);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        button:active {
            transform: scale(0.97);
        }
        ul,
        ol {
            list-style: none;
        }
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 10px 16px;
            background: var(--bg-white);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        input:focus,
        textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(232, 122, 42, 0.15);
            outline: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--bg-white);
            box-shadow: 0 1px 4px rgba(45, 42, 38, 0.06);
            height: var(--header-height);
            display: flex;
            align-items: center;
            backdrop-filter: blur(12px);
            background: rgba(255, 255, 255, 0.94);
            border-bottom: 1px solid var(--border-color);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .logo .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 2px 8px rgba(232, 122, 42, 0.25);
        }
        .logo .logo-text span {
            color: var(--primary);
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .header-nav a {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.93rem;
            font-weight: 550;
            color: var(--text-secondary);
            transition: background var(--transition), color var(--transition), box-shadow var(--transition);
            display: flex;
            align-items: center;
            white-space: nowrap;
        }
        .header-nav a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .header-nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 12px rgba(232, 122, 42, 0.30);
        }
        .header-nav a.active:hover {
            background: var(--primary-dark);
        }
        .nav-cta {
            background: var(--primary) !important;
            color: #fff !important;
            padding: 8px 22px !important;
            border-radius: 40px !important;
            font-weight: 600 !important;
            box-shadow: 0 2px 12px rgba(232, 122, 42, 0.25);
        }
        .nav-cta:hover {
            background: var(--primary-dark) !important;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(232, 122, 42, 0.35) !important;
        }
        .menu-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            background: none;
            border: none;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: var(--primary-light);
        }
        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            .header-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px 20px 24px;
                gap: 6px;
                box-shadow: 0 12px 32px rgba(45, 42, 38, 0.12);
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.35s ease, opacity 0.35s ease;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
                align-items: stretch;
            }
            .header-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .header-nav a {
                padding: 12px 18px;
                border-radius: var(--radius-sm);
                justify-content: center;
            }
            .nav-cta {
                margin-top: 6px;
                text-align: center;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            padding: 16px 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb-bar .container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-light);
        }
        .breadcrumb-bar a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb-bar a:hover {
            color: var(--primary);
        }
        .breadcrumb-bar .sep {
            color: var(--border-color);
            font-size: 0.7rem;
        }
        .breadcrumb-bar .current {
            color: var(--text-primary);
            font-weight: 550;
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 72px;
            background: linear-gradient(135deg, #2D2A26 0%, #4A3F3A 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-banner .bg-overlay {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.30;
            mix-blend-mode: overlay;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            line-height: 1.2;
        }
        .page-banner h1 i {
            margin-right: 12px;
            color: var(--accent);
        }
        .page-banner .banner-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.80);
            max-width: 680px;
            margin: 0 auto 20px;
            line-height: 1.7;
        }
        .page-banner .banner-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .page-banner .banner-tags span {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.90);
            border: 1px solid rgba(255, 255, 255, 0.10);
        }
        @media (max-width: 768px) {
            .page-banner {
                padding: 56px 0 48px;
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner .banner-desc {
                font-size: 1rem;
            }
        }

        /* ===== Section Shared ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-white {
            background: var(--bg-white);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.3px;
            line-height: 1.3;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin-bottom: 40px;
            line-height: 1.7;
        }
        .section-header {
            margin-bottom: 40px;
        }
        .section-header.centered {
            text-align: center;
        }
        .section-header.centered .section-sub {
            margin-left: auto;
            margin-right: auto;
        }
        .section-header .tag-line {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 40px;
            letter-spacing: 0.3px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }
        @media (max-width: 768px) {
            .section {
                --spacing-section: 48px;
            }
            .section-title {
                font-size: 1.55rem;
            }
            .section-sub {
                font-size: 0.95rem;
            }
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }
        .card-grid.cols-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .card-grid.cols-4 {
            grid-template-columns: repeat(4, 1fr);
        }
        @media (max-width: 1024px) {
            .card-grid.cols-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid.cols-3 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr !important;
            }
        }

        /* ===== Activity Card ===== */
        .activity-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .activity-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .activity-card .card-img {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg-section-alt);
        }
        .activity-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .activity-card:hover .card-img img {
            transform: scale(1.05);
        }
        .activity-card .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--primary);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 40px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
            z-index: 2;
        }
        .activity-card .card-badge.hot {
            background: #E53E3E;
        }
        .activity-card .card-badge.new {
            background: var(--secondary);
        }
        .activity-card .card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .activity-card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            color: var(--text-primary);
        }
        .activity-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 16px;
        }
        .activity-card .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.82rem;
            color: var(--text-light);
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
            margin-top: auto;
        }
        .activity-card .card-meta i {
            margin-right: 4px;
            color: var(--primary);
        }
        .activity-card .card-meta .tag {
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-left: auto;
        }

        /* ===== Featured Row ===== */
        .featured-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: center;
        }
        .featured-row .feat-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            aspect-ratio: 4 / 3;
            background: var(--bg-section-alt);
        }
        .featured-row .feat-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .featured-row .feat-content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .featured-row .feat-content p {
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .featured-row .feat-content .feat-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 24px;
        }
        .featured-row .feat-content .feat-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .featured-row .feat-content .feat-list li i {
            color: var(--secondary);
            margin-top: 3px;
            font-size: 0.85rem;
        }
        @media (max-width: 768px) {
            .featured-row {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .featured-row .feat-content h2 {
                font-size: 1.4rem;
            }
            .featured-row .feat-img {
                order: -1;
            }
        }

        /* ===== Stats / Numbers ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stats-grid .stat-item {
            background: var(--bg-white);
            padding: 32px 16px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .stats-grid .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stats-grid .stat-item .num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stats-grid .stat-item .num span {
            font-size: 1.4rem;
            font-weight: 600;
        }
        .stats-grid .stat-item .label {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Sub Nav / Tabs ===== */
        .sub-nav-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 36px;
            justify-content: center;
        }
        .sub-nav-tabs a {
            padding: 10px 24px;
            border-radius: 40px;
            font-size: 0.92rem;
            font-weight: 550;
            background: var(--bg-white);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sub-nav-tabs a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .sub-nav-tabs a.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 2px 12px rgba(232, 122, 42, 0.25);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            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-color);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-q {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            gap: 12px;
            user-select: none;
            color: var(--text-primary);
            transition: background var(--transition);
        }
        .faq-item .faq-q:hover {
            background: var(--primary-light);
        }
        .faq-item .faq-q i {
            color: var(--primary);
            font-size: 0.85rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            padding: 0 22px 18px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-a {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary) 0%, #D4742A 100%);
            border-radius: var(--radius-xl);
            padding: 60px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::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-block .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-block p {
            font-size: 1.1rem;
            opacity: 0.90;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .cta-block .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }
        .cta-block .btn-ghost {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.50);
            color: #fff;
            padding: 12px 32px;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            transition: all var(--transition);
        }
        .cta-block .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .cta-block {
                padding: 40px 20px;
            }
            .cta-block h2 {
                font-size: 1.5rem;
            }
            .cta-block p {
                font-size: 0.95rem;
            }
        }

        /* ===== Button Primary ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(232, 122, 42, 0.30);
            transition: all var(--transition);
            border: none;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232, 122, 42, 0.40);
            color: #fff;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 60px 0 0;
        }
        .footer .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 .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer .footer-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
        }
        .footer .footer-logo .logo-text span {
            color: var(--primary);
        }
        .footer .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.60);
            max-width: 320px;
        }
        .footer .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer .footer-col ul li a {
            color: rgba(255, 255, 255, 0.60);
            font-size: 0.9rem;
            transition: color var(--transition), padding-left var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer .footer-col ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.40);
        }
        .footer .social-links {
            display: flex;
            gap: 12px;
        }
        .footer .social-links 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, 0.50);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer .social-links a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 480px) {
            .footer .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(232, 122, 42, 0.30);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all var(--transition);
            border: none;
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: 0 8px 28px rgba(232, 122, 42, 0.40);
        }

        /* ===== Mobile Adjust ===== */
        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .page-banner .banner-tags span {
                font-size: 0.75rem;
                padding: 4px 12px;
            }
            .activity-card .card-body {
                padding: 16px 18px 18px;
            }
            .activity-card .card-body h3 {
                font-size: 1.05rem;
            }
            .sub-nav-tabs a {
                padding: 8px 16px;
                font-size: 0.82rem;
            }
        }

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