/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --primary: #e63946;
  --primary-dark: #c1121f;
  --primary-light: #f1c0c0;
  --secondary: #1d3557;
  --secondary-light: #457b9d;
  --accent: #f4a261;
  --bg: #f8f9fa;
  --bg-alt: #ffffff;
  --bg-dark: #1d3557;
  --text: #212529;
  --text-light: #6c757d;
  --text-white: #ffffff;
  --border: #dee2e6;
  --border-light: #e9ecef;
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --shadow: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-hover: 0 16px 48px rgba(0,0,0,0.14);
  --shadow-nav: 0 4px 20px rgba(0,0,0,0.06);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --container: 1200px;
  --nav-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); color: var(--text); background: var(--bg); line-height: 1.7; font-size: 16px; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title { font-size: 2rem; font-weight: 700; text-align: center; margin-bottom: 12px; color: var(--text); }
.section-subtitle { font-size: 1.05rem; text-align: center; color: var(--text-light); margin-bottom: 48px; max-width: 640px; margin-left: auto; margin-right: auto; }
.section-bg-alt { background: var(--bg-alt); }
.section-bg-dark { background: var(--bg-dark); color: var(--text-white); }
.section-bg-dark .section-title { color: var(--text-white); }
.section-bg-dark .section-subtitle { color: rgba(255,255,255,0.75); }
.text-center { text-align: center; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mb-48 { margin-bottom: 48px; }
.grid-2, .grid-3, .grid-4 { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1024px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } .grid-4 { grid-template-columns: 1fr; } .section { padding: 56px 0; } .section-title { font-size: 1.6rem; } }

/* ===== Floating Dock Navigation ===== */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 12px 0; transition: var(--transition); pointer-events: none; }
.header.scrolled { padding: 6px 0; }
.header .container { pointer-events: auto; }
.nav-dock { display: flex; align-items: center; justify-content: space-between; background: rgba(255,255,255,0.92); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-radius: 60px; padding: 8px 24px 8px 28px; box-shadow: var(--shadow-nav); border: 1px solid rgba(255,255,255,0.5); transition: var(--transition); }
.header.scrolled .nav-dock { box-shadow: 0 6px 28px rgba(0,0,0,0.10); }
.nav-logo { font-size: 1.2rem; font-weight: 700; color: var(--secondary); letter-spacing: 0.5px; white-space: nowrap; }
.nav-logo span { color: var(--primary); }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a { padding: 8px 16px; border-radius: 40px; color: var(--text); font-size: 0.92rem; font-weight: 500; transition: var(--transition); position: relative; }
.nav-links a:hover { background: rgba(230,57,70,0.08); color: var(--primary); }
.nav-links a.active { background: var(--primary); color: #fff; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-search { display: flex; align-items: center; background: var(--bg); border-radius: 40px; padding: 0 16px; border: 1px solid var(--border); transition: var(--transition); }
.nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(230,57,70,0.12); }
.nav-search input { border: none; background: transparent; padding: 8px 8px; outline: none; width: 120px; font-size: 0.88rem; color: var(--text); }
.nav-search input::placeholder { color: var(--text-light); }
.nav-search button { color: var(--text-light); font-size: 0.95rem; padding: 6px 0; }
.nav-search button:hover { color: var(--primary); }
.nav-toggle { display: none; font-size: 1.4rem; color: var(--secondary); padding: 6px 12px; border-radius: 40px; background: var(--bg); border: 1px solid var(--border); }
@media (max-width: 900px) {
  .nav-links { display: none; position: absolute; top: calc(100% + 12px); left: 24px; right: 24px; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); border-radius: 24px; flex-direction: column; padding: 16px; box-shadow: var(--shadow); border: 1px solid var(--border); gap: 4px; }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; text-align: center; padding: 12px; }
  .nav-search input { width: 80px; }
  .nav-toggle { display: block; }
  .nav-dock { padding: 6px 16px 6px 20px; }
}

/* ===== Hero Section ===== */
.hero { min-height: 85vh; display: flex; align-items: center; position: relative; background: linear-gradient(135deg, rgba(29,53,87,0.92) 0%, rgba(230,57,70,0.78) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat; padding-top: var(--nav-height); overflow: hidden; }
.hero::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 120px; background: linear-gradient(to top, var(--bg), transparent); pointer-events: none; }
.hero-content { position: relative; z-index: 2; max-width: 800px; padding: 60px 0; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.15); backdrop-filter: blur(6px); padding: 8px 20px; border-radius: 60px; color: #fff; font-size: 0.88rem; font-weight: 500; margin-bottom: 24px; border: 1px solid rgba(255,255,255,0.2); }
.hero-badge i { color: var(--accent); }
.hero h1 { font-size: 3.2rem; font-weight: 800; color: #fff; line-height: 1.2; margin-bottom: 20px; letter-spacing: -0.5px; }
.hero h1 span { color: var(--accent); }
.hero p { font-size: 1.15rem; color: rgba(255,255,255,0.85); line-height: 1.8; margin-bottom: 36px; max-width: 600px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 32px; border-radius: 60px; font-weight: 600; font-size: 0.98rem; transition: var(--transition); border: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(230,57,70,0.35); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.5); }
.btn-outline:hover { background: rgba(255,255,255,0.12); border-color: #fff; color: #fff; transform: translateY(-2px); }
.btn-white { background: #fff; color: var(--secondary); }
.btn-white:hover { background: var(--bg); color: var(--primary); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
.hero-stats { display: flex; flex-wrap: wrap; gap: 40px; margin-top: 48px; padding-top: 36px; border-top: 1px solid rgba(255,255,255,0.15); }
.hero-stat { text-align: center; }
.hero-stat-num { font-size: 2rem; font-weight: 700; color: #fff; }
.hero-stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.7); margin-top: 4px; }
@media (max-width: 768px) {
  .hero { min-height: 70vh; }
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { gap: 24px; }
}

/* ===== Service / Feature Cards ===== */
.feature-card { background: var(--bg-alt); border-radius: var(--radius); padding: 36px 28px; box-shadow: var(--shadow); border: 1px solid var(--border-light); transition: var(--transition); text-align: center; }
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.feature-icon { width: 64px; height: 64px; border-radius: 20px; display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; font-size: 1.6rem; color: #fff; }
.feature-icon.i1 { background: linear-gradient(135deg, #e63946, #f4a261); }
.feature-icon.i2 { background: linear-gradient(135deg, #1d3557, #457b9d); }
.feature-icon.i3 { background: linear-gradient(135deg, #2a9d8f, #264653); }
.feature-icon.i4 { background: linear-gradient(135deg, #e76f51, #f4a261); }
.feature-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.feature-card p { font-size: 0.94rem; color: var(--text-light); line-height: 1.7; }

/* ===== Category Entry Cards ===== */
.cat-card { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); background: var(--bg-alt); border: 1px solid var(--border-light); }
.cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.cat-card img { width: 100%; height: 200px; object-fit: cover; transition: var(--transition); }
.cat-card:hover img { transform: scale(1.05); }
.cat-card-body { padding: 20px 24px 24px; }
.cat-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; color: var(--text); }
.cat-card p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 14px; line-height: 1.6; }
.cat-tag { display: inline-block; padding: 4px 14px; border-radius: 40px; background: var(--primary-light); color: var(--primary-dark); font-size: 0.78rem; font-weight: 600; }

/* ===== Post / News List ===== */
.post-card { display: flex; gap: 20px; background: var(--bg-alt); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); border: 1px solid var(--border-light); transition: var(--transition); }
.post-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.post-card img { width: 160px; min-width: 160px; height: 120px; object-fit: cover; border-radius: var(--radius-sm); }
.post-card-body { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.post-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; color: var(--text); line-height: 1.4; }
.post-card h3 a { color: var(--text); }
.post-card h3 a:hover { color: var(--primary); }
.post-meta { display: flex; flex-wrap: wrap; gap: 12px; font-size: 0.82rem; color: var(--text-light); margin-bottom: 8px; }
.post-meta span { display: inline-flex; align-items: center; gap: 4px; }
.post-meta .cat { background: var(--primary-light); color: var(--primary-dark); padding: 2px 12px; border-radius: 40px; font-weight: 600; }
.post-excerpt { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.empty-msg { text-align: center; padding: 40px 20px; color: var(--text-light); font-size: 1rem; background: var(--bg-alt); border-radius: var(--radius); border: 1px dashed var(--border); }
@media (max-width: 640px) {
  .post-card { flex-direction: column; }
  .post-card img { width: 100%; height: 180px; }
}

/* ===== Process / Timeline ===== */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.process-step { text-align: center; position: relative; }
.process-step-num { width: 56px; height: 56px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; font-weight: 700; margin: 0 auto 16px; position: relative; z-index: 2; box-shadow: 0 4px 16px rgba(230,57,70,0.3); }
.process-step h4 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.process-step p { font-size: 0.88rem; color: var(--text-light); line-height: 1.6; }
.process-line { display: none; }
@media (min-width: 768px) {
  .process-grid { position: relative; }
  .process-grid::before { content: ''; position: absolute; top: 28px; left: 12.5%; right: 12.5%; height: 3px; background: linear-gradient(to right, var(--primary-light), var(--primary), var(--primary-light)); z-index: 1; border-radius: 4px; }
}
@media (max-width: 768px) { .process-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 16px; } }
@media (max-width: 480px) { .process-grid { grid-template-columns: 1fr; } }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--bg-alt); border-radius: var(--radius); border: 1px solid var(--border-light); overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: var(--primary-light); }
.faq-q { padding: 20px 24px; display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-weight: 600; font-size: 1rem; color: var(--text); transition: var(--transition); }
.faq-q:hover { color: var(--primary); }
.faq-q i { transition: var(--transition); color: var(--text-light); font-size: 0.9rem; }
.faq-item.open .faq-q i { transform: rotate(180deg); color: var(--primary); }
.faq-a { padding: 0 24px; max-height: 0; overflow: hidden; transition: var(--transition); color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }
.faq-item.open .faq-a { padding: 0 24px 20px; max-height: 300px; }

/* ===== CTA ===== */
.cta-section { background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%); padding: 80px 0; text-align: center; }
.cta-section h2 { font-size: 2.2rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.cta-section p { font-size: 1.1rem; color: rgba(255,255,255,0.8); margin-bottom: 32px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-section .btn { font-size: 1.05rem; padding: 16px 40px; }

/* ===== Footer ===== */
.footer { background: var(--bg-dark); color: rgba(255,255,255,0.7); padding: 60px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand h3 { font-size: 1.3rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer-brand h3 span { color: var(--primary); }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
.footer-col h4 { font-size: 1rem; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-col a { display: block; padding: 5px 0; font-size: 0.9rem; color: rgba(255,255,255,0.65); transition: var(--transition); }
.footer-col a:hover { color: #fff; padding-left: 4px; }
.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; color: rgba(255,255,255,0.45); }
.footer-bottom a { color: rgba(255,255,255,0.55); }
.footer-bottom a:hover { color: #fff; }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

/* ===== Back to Top ===== */
.back-top { position: fixed; bottom: 32px; right: 32px; width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; box-shadow: 0 4px 16px rgba(230,57,70,0.3); opacity: 0; visibility: hidden; transition: var(--transition); z-index: 999; }
.back-top.visible { opacity: 1; visibility: visible; }
.back-top:hover { background: var(--primary-dark); transform: translateY(-3px); color: #fff; }

/* ===== Extra Utilities ===== */
@media (max-width: 768px) { .hero h1 { font-size: 1.8rem; } .hero p { font-size: 0.95rem; } .section-title { font-size: 1.4rem; } .section-subtitle { font-size: 0.95rem; margin-bottom: 32px; } }

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
  --primary: #1a3a6b;
  --primary-light: #2a5a9a;
  --primary-dark: #0f2444;
  --accent: #e8b830;
  --accent-light: #f0d060;
  --accent-dark: #c9a020;
  --bg: #f7f8fa;
  --bg-card: #ffffff;
  --bg-dark: #0f1a2e;
  --bg-section: #eef1f6;
  --text: #1a2233;
  --text-light: #5a6678;
  --text-inverse: #ffffff;
  --border: #dce0e8;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --max-width: 1200px;
  --header-h: 76px;
}

/* ===== Reset & Base ===== */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}
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(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
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; color: var(--text); font-weight: 700; }
h1 { font-size: 2.2rem; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.05rem; }

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

/* ===== Header / Dock Nav ===== */
.header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(220,224,232,0.5);
  height: var(--header-h);
  display: flex; align-items: center;
}
.nav-dock {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; height: 100%;
}
.nav-logo {
  font-size: 1.3rem; font-weight: 800; color: var(--primary); white-space: nowrap;
  letter-spacing: -0.3px; line-height: 1.2;
}
.nav-logo span { color: var(--accent); font-weight: 700; }
.nav-links { display: flex; align-items: center; gap: 6px; flex-wrap: nowrap; }
.nav-links a {
  padding: 8px 18px; border-radius: 40px; font-size: 0.92rem; font-weight: 500;
  color: var(--text-light); transition: var(--transition); white-space: nowrap;
}
.nav-links a:hover { color: var(--primary); background: rgba(26,58,107,0.06); }
.nav-links a.active { color: var(--text-inverse); background: var(--primary); box-shadow: 0 4px 12px rgba(26,58,107,0.25); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-search { display: flex; align-items: center; background: var(--bg); border-radius: 40px; padding: 0 4px 0 16px; border: 1px solid var(--border); transition: var(--transition); }
.nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,58,107,0.12); }
.nav-search input { border: none; background: transparent; padding: 8px 0; outline: none; font-size: 0.9rem; min-width: 140px; color: var(--text); }
.nav-search input::placeholder { color: var(--text-light); }
.nav-search button { padding: 8px 14px; color: var(--text-light); transition: var(--transition); border-radius: 40px; }
.nav-search button:hover { color: var(--primary); }
.nav-toggle { display: none; font-size: 1.4rem; color: var(--text); padding: 8px; border-radius: 8px; }
.nav-toggle:hover { background: var(--bg); }

/* ===== Banner ===== */
.article-banner {
  position: relative;
  padding: 80px 0 60px;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
  overflow: hidden;
  min-height: 320px;
  display: flex; align-items: center;
}
.article-banner::before {
  content: '';
  position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.15;
  mix-blend-mode: overlay;
}
.article-banner .container { position: relative; z-index: 2; }
.article-banner .breadcrumb {
  display: flex; align-items: center; gap: 8px; font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-bottom: 20px; flex-wrap: wrap;
}
.article-banner .breadcrumb a { color: rgba(255,255,255,0.8); }
.article-banner .breadcrumb a:hover { color: var(--accent); }
.article-banner .breadcrumb span { color: var(--accent); }
.article-banner .breadcrumb i { font-size: 0.7rem; }
.article-banner h1 {
  font-size: 2.4rem; color: var(--text-inverse); max-width: 860px; margin-bottom: 20px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.article-meta-bar {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap; color: rgba(255,255,255,0.85); font-size: 0.95rem;
}
.article-meta-bar .meta-tag {
  background: var(--accent); color: var(--primary-dark); padding: 4px 14px; border-radius: 40px;
  font-weight: 600; font-size: 0.8rem; letter-spacing: 0.5px;
}
.article-meta-bar i { margin-right: 6px; opacity: 0.7; }

/* ===== Main Content ===== */
.article-main { padding: 60px 0 80px; }
.article-layout {
  display: grid; grid-template-columns: 1fr 320px; gap: 48px; align-items: start;
}
.article-body {
  background: var(--bg-card); border-radius: var(--radius-lg); padding: 40px 44px;
  box-shadow: var(--shadow); border: 1px solid var(--border);
}
.article-body .featured-image {
  width: 100%; border-radius: var(--radius); margin-bottom: 32px; max-height: 480px; object-fit: cover;
}
.article-body .content {
  font-size: 1.05rem; line-height: 1.9; color: var(--text);
}
.article-body .content p { margin-bottom: 1.4em; }
.article-body .content h2 { margin-top: 2em; margin-bottom: 0.8em; font-size: 1.5rem; padding-bottom: 0.3em; border-bottom: 2px solid var(--border); }
.article-body .content h3 { margin-top: 1.6em; margin-bottom: 0.6em; font-size: 1.2rem; }
.article-body .content ul, .article-body .content ol { margin-bottom: 1.4em; padding-left: 1.6em; }
.article-body .content li { margin-bottom: 0.4em; list-style: disc; }
.article-body .content ol li { list-style: decimal; }
.article-body .content blockquote {
  border-left: 4px solid var(--accent); background: var(--bg-section); padding: 16px 24px;
  margin: 1.6em 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-light); font-style: italic;
}
.article-body .content img { border-radius: var(--radius); margin: 1.6em 0; }
.article-body .content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-body .content a:hover { color: var(--accent-dark); }
.article-not-found {
  text-align: center; padding: 80px 20px;
}
.article-not-found i { font-size: 4rem; color: var(--text-light); opacity: 0.4; margin-bottom: 20px; }
.article-not-found h2 { font-size: 1.8rem; margin-bottom: 12px; }
.article-not-found p { color: var(--text-light); margin-bottom: 24px; }
.article-not-found .btn-back { display: inline-flex; align-items: center; gap: 8px; }

/* ===== Sidebar ===== */
.article-sidebar { display: flex; flex-direction: column; gap: 28px; }
.sidebar-card {
  background: var(--bg-card); border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow); border: 1px solid var(--border);
}
.sidebar-card h3 { font-size: 1.05rem; margin-bottom: 18px; padding-bottom: 12px; border-bottom: 2px solid var(--accent); display: flex; align-items: center; gap: 8px; }
.sidebar-card h3 i { color: var(--accent); }
.sidebar-list { display: flex; flex-direction: column; gap: 14px; }
.sidebar-list-item { display: flex; gap: 14px; align-items: flex-start; }
.sidebar-list-item img { width: 70px; height: 70px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
.sidebar-list-item .info { flex: 1; min-width: 0; }
.sidebar-list-item .info a { font-size: 0.92rem; font-weight: 500; color: var(--text); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sidebar-list-item .info a:hover { color: var(--primary); }
.sidebar-list-item .info .date { font-size: 0.78rem; color: var(--text-light); margin-top: 4px; display: block; }
.sidebar-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.sidebar-tags a {
  padding: 6px 16px; border-radius: 40px; font-size: 0.82rem; font-weight: 500;
  background: var(--bg-section); color: var(--text-light); border: 1px solid var(--border); transition: var(--transition);
}
.sidebar-tags a:hover { background: var(--primary); color: var(--text-inverse); border-color: var(--primary); }
.sidebar-cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--text-inverse); padding: 28px; border-radius: var(--radius); text-align: center;
}
.sidebar-cta h4 { font-size: 1.1rem; color: var(--text-inverse); margin-bottom: 8px; }
.sidebar-cta p { font-size: 0.9rem; opacity: 0.85; margin-bottom: 18px; }
.sidebar-cta .btn-accent { background: var(--accent); color: var(--primary-dark); padding: 10px 28px; border-radius: 40px; font-weight: 700; font-size: 0.95rem; display: inline-block; transition: var(--transition); }
.sidebar-cta .btn-accent:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,184,48,0.35); }

/* ===== CTA Section ===== */
.article-cta {
  margin-top: 60px; padding: 60px 0; background: var(--bg-section); border-radius: var(--radius-lg);
  text-align: center;
}
.article-cta h2 { font-size: 1.8rem; margin-bottom: 12px; }
.article-cta p { color: var(--text-light); max-width: 600px; margin: 0 auto 28px; font-size: 1.05rem; }
.article-cta .btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ===== Buttons ===== */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 30px; border-radius: 40px; font-weight: 600; font-size: 0.95rem; transition: var(--transition); border: none; cursor: pointer; text-decoration: none; }
.btn-primary { background: var(--primary); color: var(--text-inverse); box-shadow: 0 4px 14px rgba(26,58,107,0.25); }
.btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(26,58,107,0.35); color: var(--text-inverse); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--text-inverse); transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: var(--primary-dark); }
.btn-accent:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,184,48,0.3); }

/* ===== Footer ===== */
.footer { background: var(--bg-dark); color: rgba(255,255,255,0.8); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand h3 { font-size: 1.3rem; color: var(--text-inverse); margin-bottom: 14px; }
.footer-brand h3 span { color: var(--accent); }
.footer-brand p { font-size: 0.92rem; line-height: 1.7; opacity: 0.75; max-width: 400px; }
.footer-col h4 { font-size: 1rem; color: var(--text-inverse); margin-bottom: 18px; font-weight: 600; }
.footer-col a { display: block; font-size: 0.9rem; color: rgba(255,255,255,0.65); padding: 5px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-col a i { width: 22px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 24px 0; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; opacity: 0.6; }
.footer-bottom a { color: rgba(255,255,255,0.7); }
.footer-bottom a:hover { color: var(--accent); }

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

@media (max-width: 768px) {
  :root { --header-h: 64px; }
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.3rem; }
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: var(--header-h); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); padding: 16px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); gap: 4px; }
  .nav-links.open a { padding: 12px 18px; width: 100%; border-radius: var(--radius-sm); }
  .nav-toggle { display: block; }
  .nav-search input { min-width: 100px; }
  .article-banner { padding: 50px 0 40px; min-height: 240px; }
  .article-banner h1 { font-size: 1.6rem; }
  .article-body { padding: 24px 20px; }
  .article-meta-bar { gap: 12px; font-size: 0.85rem; }
  .article-sidebar { grid-template-columns: 1fr; }
  .article-cta { padding: 40px 20px; }
  .article-cta h2 { font-size: 1.4rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .btn { padding: 10px 24px; font-size: 0.9rem; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .nav-logo { font-size: 1.05rem; }
  .nav-search input { min-width: 80px; font-size: 0.82rem; }
  .article-banner h1 { font-size: 1.3rem; }
  .article-body { padding: 18px 14px; }
  .article-body .content { font-size: 0.95rem; }
  .sidebar-card { padding: 20px; }
  .article-cta .btn-group { flex-direction: column; align-items: center; }
}

/* ===== Utility ===== */
.text-center { text-align: center; }
.mt-2 { margin-top: 20px; }
.mb-2 { margin-bottom: 20px; }
.gap-2 { gap: 20px; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
:root {
  --primary: #1a3a5c;
  --primary-light: #2a5a8c;
  --primary-dark: #0f2440;
  --secondary: #d4a84b;
  --secondary-light: #e8c76a;
  --secondary-dark: #b8892e;
  --accent: #e85d3a;
  --accent-light: #f07a5a;
  --bg-body: #f7f5f0;
  --bg-white: #ffffff;
  --bg-light: #f0ede8;
  --bg-dark: #1a1a2e;
  --bg-card: #ffffff;
  --text-primary: #1a1a2e;
  --text-body: #3d3d4a;
  --text-light: #7a7a8a;
  --text-white: #ffffff;
  --text-muted: #9a9aaa;
  --border-light: #e8e5e0;
  --border-medium: #d4d0ca;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 14px 40px rgba(0,0,0,0.10);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.12);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --container-w: 1200px;
  --header-h: 78px;
}

/* ===== 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-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-body);
  background: var(--bg-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--secondary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; background: none; }
button { cursor: pointer; }
input::placeholder, textarea::placeholder { color: var(--text-muted); }

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

/* ===== Header / Floating Dock Nav ===== */
.header {
  position: fixed; top: 16px; left: 0; right: 0; z-index: 1000;
  padding: 0 20px; pointer-events: none;
}
.nav-dock {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; gap: 12px;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  border-radius: 60px; padding: 8px 22px 8px 28px;
  box-shadow: 0 4px 30px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  border: 1px solid rgba(255,255,255,0.5);
  pointer-events: auto;
  transition: var(--transition);
}
.nav-dock:hover { box-shadow: 0 6px 36px rgba(0,0,0,0.10); }
.nav-logo {
  font-size: 20px; font-weight: 700; color: var(--primary); white-space: nowrap;
  letter-spacing: -0.3px; margin-right: 8px;
}
.nav-logo span { color: var(--secondary); font-weight: 600; }
.nav-logo:hover { color: var(--primary); opacity: 0.9; }
.nav-links { display: flex; align-items: center; gap: 4px; flex: 1; justify-content: center; }
.nav-links a {
  padding: 6px 16px; border-radius: 30px; font-size: 14px; font-weight: 500;
  color: var(--text-body); transition: var(--transition); white-space: nowrap;
  position: relative;
}
.nav-links a:hover { background: rgba(26,58,92,0.06); color: var(--primary); }
.nav-links a.active { background: var(--primary); color: #fff; font-weight: 600; box-shadow: 0 2px 10px rgba(26,58,92,0.2); }
.nav-links a.active:hover { background: var(--primary-light); color: #fff; }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.nav-search {
  display: flex; align-items: center; background: var(--bg-light);
  border-radius: 30px; padding: 0 6px 0 16px; transition: var(--transition);
  border: 1px solid transparent;
}
.nav-search:focus-within { border-color: var(--primary-light); background: #fff; box-shadow: 0 0 0 3px rgba(26,58,92,0.08); }
.nav-search input { padding: 7px 0; font-size: 13px; color: var(--text-primary); background: transparent; width: 110px; transition: var(--transition); }
.nav-search input:focus { width: 150px; }
.nav-search button { padding: 6px 10px; color: var(--text-light); border-radius: 50%; transition: var(--transition); }
.nav-search button:hover { color: var(--primary); background: rgba(26,58,92,0.06); }
.nav-toggle { display: none; padding: 8px 10px; color: var(--text-primary); font-size: 20px; border-radius: 50%; transition: var(--transition); }
.nav-toggle:hover { background: rgba(0,0,0,0.04); }

/* ===== Hero Banner (分类页) ===== */
.category-hero {
  padding: 140px 0 80px; position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
}
.category-hero::before {
  content: ''; position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.12; mix-blend-mode: overlay;
}
.category-hero .container { position: relative; z-index: 2; }
.category-hero-badge {
  display: inline-block; background: rgba(212,168,75,0.2); color: var(--secondary-light);
  padding: 4px 18px; border-radius: 30px; font-size: 13px; font-weight: 500;
  letter-spacing: 1px; border: 1px solid rgba(212,168,75,0.25); margin-bottom: 16px;
}
.category-hero h1 { font-size: 44px; font-weight: 800; color: var(--text-white); line-height: 1.2; margin-bottom: 16px; }
.category-hero h1 span { color: var(--secondary); }
.category-hero p { font-size: 18px; color: rgba(255,255,255,0.8); max-width: 680px; line-height: 1.7; }
.category-hero-stats {
  display: flex; gap: 40px; margin-top: 32px; flex-wrap: wrap;
}
.category-hero-stats .stat-item { display: flex; flex-direction: column; }
.category-hero-stats .stat-number { font-size: 32px; font-weight: 800; color: var(--text-white); letter-spacing: -0.5px; }
.category-hero-stats .stat-label { font-size: 13px; color: rgba(255,255,255,0.65); margin-top: 2px; }

/* ===== Section Common ===== */
.section { padding: 70px 0; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 32px; font-weight: 700; color: var(--text-primary); margin-bottom: 10px; }
.section-header h2 span { color: var(--primary); }
.section-header p { font-size: 16px; color: var(--text-light); max-width: 600px; margin: 0 auto; }
.section-bg-light { background: var(--bg-white); }
.section-bg-alt { background: var(--bg-light); }

/* ===== Card Grid ===== */
.card-grid {
  display: grid; gap: 24px;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.card {
  background: var(--bg-card); border-radius: var(--radius-md);
  overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
  transition: var(--transition);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.card-img { width: 100%; height: 180px; object-fit: cover; display: block; background: var(--bg-light); }
.card-body { padding: 20px 22px 24px; }
.card-body .tag {
  display: inline-block; background: rgba(26,58,92,0.06); color: var(--primary-light);
  font-size: 12px; font-weight: 600; padding: 2px 12px; border-radius: 20px; margin-bottom: 10px;
}
.card-body h3 { font-size: 18px; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; line-height: 1.4; }
.card-body p { font-size: 14px; color: var(--text-light); line-height: 1.6; margin-bottom: 12px; }
.card-body .card-meta { display: flex; align-items: center; gap: 16px; font-size: 13px; color: var(--text-muted); }
.card-body .card-meta i { margin-right: 4px; }

/* ===== Guide Timeline ===== */
.timeline { position: relative; padding-left: 40px; }
.timeline::before {
  content: ''; position: absolute; left: 16px; top: 0; bottom: 0;
  width: 3px; background: linear-gradient(to bottom, var(--secondary), var(--primary-light));
  border-radius: 4px;
}
.timeline-item { position: relative; margin-bottom: 32px; padding-left: 20px; }
.timeline-item::before {
  content: ''; position: absolute; left: -36px; top: 6px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--secondary); border: 3px solid var(--bg-body);
  box-shadow: 0 0 0 3px var(--secondary);
}
.timeline-item .tl-date { font-size: 13px; font-weight: 600; color: var(--primary); margin-bottom: 4px; }
.timeline-item h4 { font-size: 18px; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.timeline-item p { font-size: 14px; color: var(--text-light); max-width: 600px; }

/* ===== Channel / Logo Row ===== */
.channel-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px; margin-top: 24px;
}
.channel-item {
  background: var(--bg-white); border: 1px solid var(--border-light);
  border-radius: var(--radius-sm); padding: 16px 12px; text-align: center;
  transition: var(--transition);
}
.channel-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.channel-item .channel-icon { font-size: 32px; color: var(--primary); margin-bottom: 6px; }
.channel-item .channel-name { font-size: 14px; font-weight: 600; color: var(--text-body); }

/* ===== FAQ ===== */
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item {
  background: var(--bg-white); border: 1px solid var(--border-light);
  border-radius: var(--radius-md); margin-bottom: 12px; overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--border-medium); }
.faq-question {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 24px; cursor: pointer; font-size: 16px; font-weight: 600;
  color: var(--text-primary); transition: var(--transition);
}
.faq-question i { color: var(--text-light); transition: var(--transition); font-size: 14px; }
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
.faq-answer { padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; }
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 20px; }
.faq-answer p { font-size: 15px; color: var(--text-light); line-height: 1.7; }

/* ===== CTA ===== */
.cta-section {
  padding: 70px 0; text-align: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  position: relative; overflow: hidden;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  opacity: 0.08; mix-blend-mode: overlay;
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { font-size: 32px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.cta-section p { font-size: 16px; color: rgba(255,255,255,0.75); margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 32px; border-radius: 40px; font-weight: 600; font-size: 15px; transition: var(--transition); border: none; }
.btn-primary { background: var(--secondary); color: var(--primary-dark); }
.btn-primary:hover { background: var(--secondary-light); color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(212,168,75,0.35); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.4); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; transform: translateY(-2px); }

/* ===== Footer ===== */
.footer {
  background: var(--primary-dark); color: rgba(255,255,255,0.8); 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(255,255,255,0.06); }
.footer-brand h3 { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.footer-brand h3 span { color: var(--secondary); }
.footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 360px; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 14px; }
.footer-col a { display: block; font-size: 14px; color: rgba(255,255,255,0.6); padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--secondary); padding-left: 4px; }
.footer-col a i { width: 20px; margin-right: 4px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 20px 0; font-size: 13px; color: rgba(255,255,255,0.4); flex-wrap: wrap; gap: 8px; }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--secondary); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .nav-links a { padding: 6px 12px; font-size: 13px; }
  .nav-search input { width: 80px; }
  .nav-search input:focus { width: 120px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
  .header { top: 10px; padding: 0 12px; }
  .nav-dock { padding: 6px 14px 6px 18px; border-radius: 40px; flex-wrap: nowrap; }
  .nav-links { display: none; position: absolute; top: calc(100% + 12px); left: 0; right: 0; background: rgba(255,255,255,0.96); backdrop-filter: blur(18px); border-radius: 24px; padding: 12px; flex-direction: column; box-shadow: var(--shadow-lg); border: 1px solid var(--border-light); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 16px; font-size: 15px; width: 100%; border-radius: 12px; }
  .nav-toggle { display: block; }
  .nav-search input { width: 80px; }
  .nav-search input:focus { width: 100px; }
  .category-hero { padding: 110px 0 50px; }
  .category-hero h1 { font-size: 30px; }
  .category-hero p { font-size: 16px; }
  .category-hero-stats { gap: 24px; }
  .category-hero-stats .stat-number { font-size: 26px; }
  .section { padding: 50px 0; }
  .section-header h2 { font-size: 26px; }
  .card-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .timeline { padding-left: 32px; }
  .timeline-item::before { left: -28px; width: 14px; height: 14px; }
  .cta-section h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .nav-dock { padding: 6px 10px 6px 14px; }
  .nav-logo { font-size: 16px; }
  .nav-search input { width: 60px; font-size: 12px; }
  .nav-search input:focus { width: 80px; }
  .category-hero { padding: 100px 0 40px; }
  .category-hero h1 { font-size: 24px; }
  .category-hero-stats { flex-direction: column; gap: 12px; }
  .card-grid { grid-template-columns: 1fr; }
  .channel-grid { grid-template-columns: repeat(2, 1fr); }
  .section-header h2 { font-size: 22px; }
  .cta-section h2 { font-size: 22px; }
  .btn { padding: 10px 22px; font-size: 14px; }
}

/* ===== 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: 20px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md); transition: var(--transition);
  opacity: 0; visibility: hidden; transform: translateY(12px);
}
.back-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--primary-light); transform: translateY(-4px); box-shadow: var(--shadow-lg); color: #fff; }