/* roulang page: index */
:root {
  --primary: #0d2b45;
  --primary-2: #133e63;
  --primary-3: #1a5487;
  --accent: #f0a322;
  --accent-2: #e5920c;
  --accent-soft: #fef3e2;
  --bg: #f0f4f8;
  --surface: #ffffff;
  --text: #13293d;
  --text-2: #4a6478;
  --text-3: #859aa8;
  --border: #dce5ec;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-card: 0 4px 20px rgba(13,43,69,0.06);
  --shadow-hover: 0 12px 32px rgba(13,43,69,0.12);
  --shadow-hero: 0 20px 60px rgba(0,0,0,0.25);
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --container-width: 1200px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-tag { display: inline-block; font-size: 13px; font-weight: 600; color: var(--accent); background: var(--accent-soft); padding: 5px 16px; border-radius: 100px; letter-spacing: 0.5px; margin-bottom: 14px; }
.section-title { font-size: 34px; font-weight: 800; line-height: 1.3; color: var(--primary); margin-bottom: 12px; }
.section-subtitle { font-size: 16px; color: var(--text-2); line-height: 1.7; }
.accent-text { color: var(--accent); }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(220,229,236,0.8);
  box-shadow: 0 2px 12px rgba(13,43,69,0.04);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 22px; font-weight: 800; color: var(--primary);
  letter-spacing: 0.5px;
}
.nav-brand i { color: var(--accent); font-size: 24px; }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-link {
  display: inline-block; padding: 8px 18px; border-radius: 100px;
  font-size: 15px; font-weight: 500; color: var(--text-2);
  transition: all var(--transition);
}
.nav-link:hover { color: var(--primary); background: rgba(13,43,69,0.06); }
.nav-link.active { color: var(--primary); background: rgba(13,43,69,0.10); font-weight: 700; }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--accent); color: #fff; font-size: 14px; font-weight: 700;
  padding: 10px 24px; border-radius: 100px;
  box-shadow: 0 4px 14px rgba(240,163,34,0.35);
  transition: all var(--transition);
}
.nav-cta:hover { background: var(--accent-2); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(240,163,34,0.4); }
.nav-toggle { display: none; }

/* ===== Hero ===== */
.hero { position: relative; overflow: hidden; background: var(--primary); padding: 100px 0 80px; }
.hero-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; opacity: 0.35; }
.hero-bg::after { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(13,43,69,0.88) 0%, rgba(13,43,69,0.55) 60%, rgba(240,163,34,0.15) 100%); }
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 800px; margin: 0 auto; }
.hero-badge {
  display: inline-block; font-size: 13px; font-weight: 600; color: var(--accent);
  background: rgba(255,255,255,0.12); border: 1px solid rgba(240,163,34,0.4);
  padding: 6px 20px; border-radius: 100px; letter-spacing: 1px; margin-bottom: 24px;
}
.hero-title { font-size: 52px; font-weight: 900; color: #fff; line-height: 1.2; margin-bottom: 20px; letter-spacing: 1px; }
.hero-subtitle { font-size: 18px; color: rgba(255,255,255,0.85); line-height: 1.8; margin-bottom: 36px; max-width: 640px; margin-left: auto; margin-right: auto; }
.hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.btn-primary, .btn-outline, .btn-accent { display: inline-flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 700; padding: 14px 32px; border-radius: 100px; transition: all var(--transition); }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 6px 20px rgba(240,163,34,0.4); }
.btn-primary:hover { background: var(--accent-2); transform: translateY(-3px); box-shadow: 0 10px 28px rgba(240,163,34,0.45); }
.btn-outline { border: 1.5px solid rgba(255,255,255,0.6); color: #fff; background: rgba(255,255,255,0.08); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(255,255,255,0.12); transform: translateY(-3px); }
.hero-stats { position: relative; z-index: 2; display: flex; justify-content: center; gap: 40px; margin-top: 60px; flex-wrap: wrap; }
.hero-stat { text-align: center; padding: 10px 20px; }
.hero-stat-num { font-size: 32px; font-weight: 900; color: var(--accent); line-height: 1.2; }
.hero-stat-label { font-size: 14px; color: rgba(255,255,255,0.7); margin-top: 4px; }

/* ===== Features ===== */
.features { background: var(--bg); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
  background: var(--surface); border-radius: var(--radius-lg); padding: 36px 30px;
  box-shadow: var(--shadow-card); border: 1px solid var(--border);
  transition: all var(--transition);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.feature-icon { width: 56px; height: 56px; border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 24px; background: var(--accent-soft); color: var(--accent); margin-bottom: 20px; }
.feature-card h3 { font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
.feature-card p { font-size: 15px; color: var(--text-2); line-height: 1.7; }

/* ===== Categories ===== */
.categories { background: var(--surface); }
.categories-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.category-card {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-card); transition: all var(--transition); background: var(--surface);
}
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.category-media { position: relative; height: 180px; overflow: hidden; }
.category-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.category-card:hover .category-media img { transform: scale(1.05); }
.category-media .category-overlay { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(13,43,69,0.7) 0%, transparent 60%); }
.category-tag { position: absolute; top: 14px; left: 14px; background: rgba(255,255,255,0.92); color: var(--primary); font-size: 12px; font-weight: 700; padding: 4px 14px; border-radius: 100px; }
.category-body { padding: 22px 24px 26px; }
.category-body h3 { font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.category-body p { font-size: 14px; color: var(--text-2); line-height: 1.6; margin-bottom: 16px; }
.category-link { display: inline-flex; align-items: center; gap: 6px; color: var(--accent); font-size: 14px; font-weight: 600; }
.category-link i { transition: transform var(--transition); }
.category-link:hover i { transform: translateX(4px); }

/* ===== Latest News ===== */
.latest { background: var(--bg); }
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card {
  background: var(--surface); border-radius: var(--radius-md); padding: 26px 28px;
  border: 1px solid var(--border); box-shadow: var(--shadow-card);
  transition: all var(--transition); display: flex; flex-direction: column;
}
.news-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: rgba(240,163,34,0.3); }
.news-card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.news-category { font-size: 12px; font-weight: 700; color: var(--accent); background: var(--accent-soft); padding: 3px 12px; border-radius: 100px; }
.news-date { font-size: 13px; color: var(--text-3); }
.news-title { font-size: 18px; font-weight: 700; color: var(--primary); line-height: 1.4; margin-bottom: 8px; }
.news-title a:hover { color: var(--accent); }
.news-excerpt { font-size: 14px; color: var(--text-2); line-height: 1.6; margin-bottom: 16px; flex-grow: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-more { font-size: 14px; font-weight: 600; color: var(--accent); display: inline-flex; align-items: center; gap: 5px; }
.news-more i { transition: transform var(--transition); font-size: 12px; }
.news-more:hover i { transform: translateX(4px); }
.news-empty { grid-column: 1 / -1; text-align: center; padding: 48px; background: var(--surface); border-radius: var(--radius-md); border: 1px dashed var(--border); color: var(--text-3); }

/* ===== Steps ===== */
.steps { background: var(--surface); position: relative; }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; position: relative; }
.step-item { text-align: center; position: relative; }
.step-num { width: 68px; height: 68px; margin: 0 auto 20px; border-radius: 50%; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-3) 100%); color: var(--accent); font-size: 26px; font-weight: 900; display: flex; align-items: center; justify-content: center; box-shadow: 0 8px 24px rgba(13,43,69,0.2); }
.step-item h3 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.step-item p { font-size: 14px; color: var(--text-2); max-width: 260px; margin: 0 auto; }
.step-item:not(:last-child)::after { content: ''; position: absolute; top: 34px; right: -16px; width: 32px; height: 2px; background: var(--border); }

/* ===== FAQ ===== */
.faq { background: var(--bg); }
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item { background: var(--surface); border-radius: var(--radius-md); border: 1px solid var(--border); margin-bottom: 16px; overflow: hidden; box-shadow: var(--shadow-card); transition: box-shadow var(--transition); }
.faq-item:hover { box-shadow: var(--shadow-hover); }
.faq-question { display: flex; justify-content: space-between; align-items: center; padding: 20px 26px; cursor: pointer; font-size: 16px; font-weight: 600; color: var(--primary); }
.faq-question i { color: var(--accent); font-size: 14px; transition: transform var(--transition); }
.faq-item.active .faq-question i { transform: rotate(45deg); }
.faq-answer { display: none; padding: 0 26px 22px; font-size: 15px; color: var(--text-2); line-height: 1.7; }

/* ===== CTA ===== */
.cta-section { background: var(--primary); position: relative; overflow: hidden; }
.cta-section .cta-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; opacity: 0.2; }
.cta-card { position: relative; z-index: 2; text-align: center; padding: 80px 24px; }
.cta-card h2 { font-size: 32px; font-weight: 800; color: #fff; margin-bottom: 14px; }
.cta-card p { font-size: 16px; color: rgba(255,255,255,0.8); margin-bottom: 28px; }
.btn-accent { background: var(--accent); color: var(--primary); box-shadow: 0 6px 20px rgba(240,163,34,0.4); }
.btn-accent:hover { background: var(--accent-2); transform: translateY(-3px); box-shadow: 0 10px 28px rgba(240,163,34,0.5); color: #fff; }

/* ===== Footer ===== */
.site-footer { background: var(--primary); color: rgba(255,255,255,0.7); padding: 56px 0 88px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
.footer-brand .nav-brand { color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: 14px; line-height: 1.7; max-width: 360px; }
.footer-col h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: rgba(255,255,255,0.65); transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom { margin-top: 40px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 13px; color: rgba(255,255,255,0.45); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* ===== Mobile Tabs ===== */
.mobile-tabs { display: none; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-title { font-size: 42px; }
  .section { padding: 64px 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .site-header .container { height: 64px; }
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: inline-flex; font-size: 22px; color: var(--primary); padding: 8px; }
  .hero { padding: 70px 0 56px; }
  .hero-title { font-size: 34px; }
  .hero-subtitle { font-size: 16px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-stats { gap: 20px; margin-top: 40px; }
  .hero-stat-num { font-size: 26px; }
  .features-grid, .categories-grid, .steps-grid { grid-template-columns: 1fr; gap: 20px; }
  .news-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 28px; }
  .section { padding: 56px 0; }
  .section-head { margin-bottom: 36px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .site-footer { padding-bottom: 90px; }
  .mobile-tabs {
    display: flex; position: fixed; bottom: 0; left: 0; right: 0; z-index: 200;
    background: rgba(255,255,255,0.96); backdrop-filter: blur(12px);
    border-top: 1px solid var(--border); box-shadow: 0 -4px 16px rgba(13,43,69,0.06);
    height: 64px; justify-content: space-around; align-items: center;
  }
  .tab-item { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px; font-size: 11px; color: var(--text-3); padding: 6px 12px; border-radius: 10px; transition: all var(--transition); }
  .tab-item i { font-size: 18px; }
  .tab-item.active { color: var(--accent); font-weight: 700; }
  .tab-item:hover { color: var(--primary); }
  .cta-card h2 { font-size: 24px; }
  .btn-primary, .btn-outline, .btn-accent { width: 100%; justify-content: center; }
  .hero-actions .btn-primary, .hero-actions .btn-outline { width: 100%; max-width: 260px; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .hero-title { font-size: 28px; }
  .hero-subtitle { font-size: 15px; }
  .hero-stat { padding: 6px 12px; }
  .hero-stat-num { font-size: 22px; }
  .footer-bottom { flex-direction: column; gap: 4px; }
  .news-card { padding: 20px; }
  .feature-card, .category-body { padding-left: 20px; padding-right: 20px; }
}

/* roulang page: category1 */
:root {
  --primary: #1e40af;
  --primary-rgb: 30, 64, 175;
  --primary-dark: #172f7e;
  --primary-light: #3b82f6;
  --accent: #f59e0b;
  --accent-rgb: 245, 158, 11;
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --text: #1e293b;
  --text-light: #5b6b82;
  --text-lighter: #94a3b8;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(var(--primary-rgb), .08);
  --shadow-lg: 0 20px 45px rgba(var(--primary-rgb), .14);
  --container: 1200px;
  --header-h: 76px;
  --transition: .25s ease;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  padding-top: var(--header-h);
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
img {
  max-width: 100%;
  display: block;
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}
ul, ol {
  list-style: none;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(var(--accent-rgb), .5);
  outline-offset: 2px;
  border-radius: 4px;
}
::selection {
  background: rgba(var(--primary-rgb), .18);
}

/* ========== Header / Nav ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}
.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: .5px;
}
.nav-brand i {
  font-size: 1.5rem;
  color: var(--accent);
  background: linear-gradient(135deg, #f59e0b, #d97706);
  -webkit-background-clip: text;
  background-clip: text;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  position: relative;
  padding: 10px 16px;
  border-radius: 8px;
  font-weight: 600;
  color: var(--text-light);
  font-size: .97rem;
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover {
  color: var(--primary);
  background: rgba(var(--primary-rgb), .06);
}
.nav-link.active {
  color: var(--primary);
  background: rgba(var(--primary-rgb), .1);
}
.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  border-radius: 4px;
  background: var(--accent);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 50px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: .92rem;
  box-shadow: 0 6px 18px rgba(var(--primary-rgb), .28);
  white-space: nowrap;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.nav-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(var(--primary-rgb), .34);
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 1.2rem;
  align-items: center;
  justify-content: center;
}
.nav-toggle:hover {
  background: rgba(var(--primary-rgb), .08);
  color: var(--primary);
}

/* ========== Page Banner ========== */
.page-banner {
  position: relative;
  padding: 96px 0 84px;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  color: #fff;
}
.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(15, 23, 42, .86) 0%, rgba(15, 23, 42, .68) 50%, rgba(30, 64, 175, .55) 100%);
}
.page-banner .container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .88rem;
  color: rgba(255, 255, 255, .72);
  margin-bottom: 20px;
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb i {
  font-size: .7rem;
}
.page-banner h1 {
  font-size: clamp(2rem, 4.2vw, 3.2rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.page-banner h1 span {
  color: var(--accent);
}
.page-banner .banner-desc {
  font-size: 1.08rem;
  max-width: 680px;
  color: rgba(255, 255, 255, .85);
  line-height: 1.8;
}

/* ========== Section Common ========== */
.section-block {
  padding: 88px 0;
}
.section-block.alt {
  background: var(--surface);
}
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(var(--primary-rgb), .08);
  color: var(--primary);
  font-weight: 700;
  font-size: .82rem;
  letter-spacing: 2px;
  padding: 7px 16px;
  border-radius: 50px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  font-weight: 800;
  color: var(--text);
  line-height: 1.35;
  margin-bottom: 10px;
}
.section-head p {
  color: var(--text-light);
  font-size: 1rem;
  line-height: 1.8;
}

/* ========== Overview ========== */
.guide-overview {
  background: var(--bg);
}
.overview-content {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
}
.overview-text h2 {
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text);
}
.overview-text p {
  color: var(--text-light);
  margin-bottom: 14px;
  font-size: 1.02rem;
}
.overview-text .highlight {
  color: var(--primary);
  font-weight: 700;
}
.topic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.topic-tags span {
  background: rgba(var(--primary-rgb), .08);
  border: 1px solid rgba(var(--primary-rgb), .14);
  color: var(--primary);
  font-size: .84rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 50px;
}
.overview-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 16px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}
.stat-num small {
  font-size: 1rem;
  color: var(--accent);
  font-weight: 700;
}
.stat-label {
  font-size: .88rem;
  color: var(--text-light);
  margin-top: 6px;
}

/* ========== Play Cards ========== */
.core-play {
  background: var(--surface);
}
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.play-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.play-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(var(--primary-rgb), .2);
}
.play-media {
  position: relative;
  height: 180px;
  overflow: hidden;
  background: var(--surface-2);
}
.play-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s ease;
}
.play-card:hover .play-media img {
  transform: scale(1.05);
}
.play-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(15, 23, 42, .72);
  color: #fff;
  font-size: .8rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 50px;
  backdrop-filter: blur(6px);
  letter-spacing: .5px;
}
.play-body {
  padding: 24px;
}
.play-body h3 {
  font-size: 1.22rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}
.play-body p {
  font-size: .93rem;
  color: var(--text-light);
  line-height: 1.75;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-weight: 700;
  font-size: .88rem;
  color: var(--primary);
}
.text-link i {
  transition: transform var(--transition);
  font-size: .8rem;
}
.text-link:hover i {
  transform: translateX(4px);
}

/* ========== Compare Table ========== */
.compare-section {
  background: var(--bg);
}
.table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow-x: auto;
  padding: 8px;
}
.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  min-width: 580px;
}
.table-wrap th {
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: .92rem;
  padding: 15px 20px;
  text-align: center;
  letter-spacing: .5px;
}
.table-wrap th:first-child {
  border-radius: 10px 0 0 0;
}
.table-wrap th:last-child {
  border-radius: 0 10px 0 0;
}
.table-wrap td {
  padding: 14px 20px;
  text-align: center;
  font-size: .92rem;
  color: var(--text-light);
  border-bottom: 1px solid var(--border);
}
.table-wrap tr:last-child td {
  border-bottom: none;
}
.table-wrap tr:hover td {
  background: rgba(var(--primary-rgb), .03);
}
.table-wrap td:first-child {
  font-weight: 700;
  color: var(--text);
}
.table-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: .82rem;
  font-weight: 600;
}
.table-badge.low {
  background: #dcfce7;
  color: #16a34a;
}
.table-badge.mid {
  background: #fef3c7;
  color: #d97706;
}
.table-badge.high {
  background: #fee2e2;
  color: #dc2626;
}

/* ========== Strategy ========== */
.strategy-section {
  background: var(--surface);
}
.strategy-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.strategy-card {
  background: linear-gradient(160deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 24px;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}
.strategy-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}
.strategy-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: rgba(var(--primary-rgb), .1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--primary);
  margin-bottom: 18px;
}
.strategy-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}
.strategy-card p {
  font-size: .9rem;
  color: var(--text-light);
  line-height: 1.75;
}
.strategy-num {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 2.4rem;
  font-weight: 800;
  color: rgba(var(--primary-rgb), .07);
  line-height: 1;
}

/* ========== Steps ========== */
.steps-section {
  background: var(--primary);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.steps-section::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .06);
}
.steps-section .section-head h2 {
  color: #fff;
}
.steps-section .section-head p {
  color: rgba(255, 255, 255, .75);
}
.steps-section .section-eyebrow {
  background: rgba(255, 255, 255, .14);
  color: #fff;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
  position: relative;
  z-index: 2;
}
.step-item {
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--radius);
  padding: 30px 22px;
  backdrop-filter: blur(4px);
  transition: background var(--transition), transform var(--transition);
}
.step-item:hover {
  background: rgba(255, 255, 255, .16);
  transform: translateY(-4px);
}
.step-num {
  display: inline-block;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 12px;
  font-style: italic;
}
.step-item h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #fff;
}
.step-item p {
  font-size: .9rem;
  color: rgba(255, 255, 255, .78);
  line-height: 1.75;
}

/* ========== FAQ ========== */
.faq-section {
  background: var(--surface);
}
.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item:hover {
  border-color: rgba(var(--primary-rgb), .2);
  box-shadow: var(--shadow);
}
.faq-item details {
  padding: 20px 24px;
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition);
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary i {
  font-size: .85rem;
  color: var(--primary);
  transition: transform var(--transition), color var(--transition);
  flex-shrink: 0;
}
.faq-item details[open] summary {
  color: var(--primary);
}
.faq-item details[open] summary i {
  transform: rotate(180deg);
}
.faq-answer {
  padding-top: 14px;
  color: var(--text-light);
  font-size: .94rem;
  line-height: 1.8;
  border-top: 1px dashed var(--border);
  margin-top: 14px;
}

/* ========== CTA ========== */
.cta-section {
  background: var(--bg);
  padding: 70px 0 90px;
}
.cta-box {
  background: linear-gradient(120deg, var(--primary) 0%, var(--primary-dark) 60%, #0b1d4a 100%);
  border-radius: 24px;
  padding: 56px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .08);
}
.cta-box h2 {
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 800;
  margin-bottom: 14px;
}
.cta-box p {
  max-width: 520px;
  margin: 0 auto 30px;
  color: rgba(255, 255, 255, .82);
  font-size: 1rem;
  line-height: 1.8;
}
.cta-btns {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 50px;
  font-weight: 700;
  font-size: .95rem;
  background: var(--accent);
  color: #1e293b;
  box-shadow: 0 8px 20px rgba(var(--accent-rgb), .35);
  transition: transform var(--transition), box-shadow var(--transition);
}
.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(var(--accent-rgb), .45);
}
.btn-outline {
  background: transparent;
  border: 2px solid rgba(255, 255, 255, .6);
  color: #fff;
  box-shadow: none;
}
.btn-outline:hover {
  background: rgba(255, 255, 255, .12);
  border-color: #fff;
  box-shadow: none;
}

/* ========== Footer ========== */
.site-footer {
  background: #0b1120;
  color: rgba(255, 255, 255, .7);
  padding: 70px 0 0;
}
.site-footer .nav-brand {
  color: #fff;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.footer-brand p {
  margin-top: 14px;
  font-size: .92rem;
  line-height: 1.75;
  max-width: 340px;
  color: rgba(255, 255, 255, .6);
}
.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 18px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  font-size: .92rem;
  color: rgba(255, 255, 255, .6);
  transition: color var(--transition);
}
.footer-col ul a:hover {
  color: var(--accent);
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 24px 0;
  font-size: .85rem;
  color: rgba(255, 255, 255, .46);
}
.footer-bottom .nav-brand {
  font-size: .85rem;
}

/* ========== Mobile Tabbar ========== */
.mobile-tabbar {
  display: none;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .strategy-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .overview-content {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .overview-stats {
    max-width: 560px;
    margin: 0 auto;
  }
  .site-header .container {
    gap: 16px;
  }
  .nav-link {
    padding: 10px 12px;
    font-size: .92rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}
@media (max-width: 768px) {
  :root {
    --header-h: 64px;
  }
  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, .12);
    transform: translateY(-130%);
    transition: transform .3s ease;
    border-bottom: 1px solid var(--border);
    border-radius: 0 0 16px 16px;
    z-index: 999;
  }
  .nav-links.open {
    transform: translateY(0);
  }
  .nav-link {
    padding: 13px 16px;
    font-size: 1rem;
    border-radius: 10px;
  }
  .nav-link.active::after {
    display: none;
  }
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .page-banner {
    padding: 64px 0 56px;
  }
  .page-banner h1 {
    font-size: 1.8rem;
  }
  .section-block {
    padding: 58px 0;
  }
  .section-head {
    margin-bottom: 34px;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
  .strategy-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .faq-item details {
    padding: 16px 18px;
  }
  .cta-box {
    padding: 40px 24px;
  }
  .cta-box h2 {
    font-size: 1.5rem;
  }
  .overview-stats {
    grid-template-columns: 1fr;
  }
  .stat-card {
    padding: 22px;
  }
  .stat-num {
    font-size: 1.9rem;
  }
  .table-wrap {
    border-radius: 12px;
  }
  .table-wrap th, .table-wrap td {
    padding: 12px 14px;
  }
  body {
    padding-bottom: 64px;
  }
  .mobile-tabbar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 62px;
    background: rgba(255, 255, 255, .96);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: stretch;
    z-index: 1001;
    box-shadow: 0 -6px 20px rgba(0, 0, 0, .04);
  }
  .tab-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    font-size: .72rem;
    color: var(--text-light);
    font-weight: 600;
    transition: color var(--transition);
  }
  .tab-item i {
    font-size: 1.1rem;
  }
  .tab-item.active {
    color: var(--primary);
  }
  .tab-item.active i {
    transform: scale(1.1);
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }
  .page-banner {
    padding: 48px 0 42px;
  }
  .page-banner h1 {
    font-size: 1.55rem;
  }
  .banner-desc {
    font-size: .94rem !important;
  }
  .section-head h2 {
    font-size: 1.4rem;
  }
  .play-media {
    height: 160px;
  }
  .tag-list {
    flex-wrap: wrap;
  }
  .strategy-card {
    padding: 24px 18px;
  }
  .cta-btns {
    flex-direction: column;
    align-items: center;
  }
  .btn, .btn-outline {
    width: 100%;
    justify-content: center;
  }
  .table-wrap {
    margin: 0 -6px;
    padding: 4px;
  }
  .table-wrap th, .table-wrap td {
    padding: 10px 10px;
    font-size: .85rem;
  }
}
@media (min-width: 769px) {
  .mobile-tabbar {
    display: none !important;
  }
}

/* roulang page: article */
:root {
            --primary: #e63946;
            --primary-dark: #b91c1c;
            --primary-light: #fef2f2;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --bg: #f7f8fc;
            --bg-deep: #111827;
            --card: #ffffff;
            --text: #1e293b;
            --text-weak: #6b7280;
            --border: #e5e7eb;
            --radius: 16px;
            --radius-sm: 12px;
            --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 24px 48px rgba(15, 23, 42, 0.14);
            --space: clamp(50px, 8vw, 90px);
            --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input,
        textarea {
            font-family: inherit;
        }
        ul,
        ol {
            list-style-position: inside;
        }
        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible {
            outline: 3px solid rgba(230, 57, 70, 0.5);
            outline-offset: 2px;
        }

        .container {
            width: min(1200px, 92%);
            margin: 0 auto;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
        }
        .site-header .container {
            height: 68px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--secondary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .nav-brand i {
            color: var(--primary);
            font-size: 1.4rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .nav-link {
            padding: 0.5rem 1rem;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            transition: all 0.25s ease;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 700;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: var(--secondary);
            color: #fff;
            padding: 0.55rem 1.2rem;
            border-radius: 999px;
            font-size: 0.9rem;
            font-weight: 600;
            transition: all 0.25s ease;
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(230, 57, 70, 0.25);
        }
        .nav-toggle {
            display: none;
        }

        /* ===== 页面 Banner ===== */
        .page-hero {
            position: relative;
            padding: 80px 0;
            background: var(--secondary);
            overflow: hidden;
        }
        .page-hero .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.45;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(17, 24, 39, 0.2), rgba(17, 24, 39, 0.72));
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            color: #fff;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 1.25rem;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb i {
            font-size: 0.6rem;
        }
        .post-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            padding: 0.3rem 0.9rem;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            backdrop-filter: blur(4px);
            margin-bottom: 1rem;
        }
        .page-hero h1 {
            font-size: clamp(1.6rem, 3.2vw, 2.5rem);
            font-weight: 800;
            line-height: 1.35;
            max-width: 780px;
        }
        .post-hero-meta {
            display: flex;
            align-items: center;
            gap: 1.2rem;
            margin-top: 1.2rem;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.75);
            flex-wrap: wrap;
        }
        .post-hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        /* ===== 文章主体 ===== */
        .post-section {
            padding: var(--space) 0;
        }
        .post-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 340px;
            gap: 2.5rem;
            align-items: start;
        }
        .post-card {
            background: var(--card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: clamp(1.5rem, 3vw, 2.5rem);
            border: 1px solid rgba(255, 255, 255, 0.6);
        }
        .post-meta-line {
            display: flex;
            align-items: center;
            gap: 1.25rem;
            font-size: 0.88rem;
            color: var(--text-weak);
            padding-bottom: 1rem;
            margin-bottom: 1.5rem;
            border-bottom: 1px solid var(--border);
            flex-wrap: wrap;
        }
        .post-meta-line span {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .post-content {
            font-size: 1.02rem;
            line-height: 1.85;
            color: var(--text);
        }
        .post-content h2,
        .post-content h3,
        .post-content h4 {
            color: var(--secondary);
            font-weight: 700;
            line-height: 1.4;
            margin: 2rem 0 0.85rem;
        }
        .post-content h2 {
            font-size: 1.5rem;
            border-bottom: 2px solid var(--border);
            padding-bottom: 0.5rem;
        }
        .post-content h3 {
            font-size: 1.25rem;
        }
        .post-content h4 {
            font-size: 1.08rem;
        }
        .post-content p {
            margin: 1rem 0;
            line-height: 1.85;
        }
        .post-content a {
            color: var(--primary);
            border-bottom: 1px solid transparent;
            transition: border-color 0.2s;
        }
        .post-content a:hover {
            border-bottom-color: var(--primary);
        }
        .post-content ul,
        .post-content ol {
            padding-left: 1.25rem;
            margin: 1rem 0;
        }
        .post-content ul {
            list-style: disc;
        }
        .post-content ol {
            list-style: decimal;
        }
        .post-content li {
            margin: 0.45rem 0;
            line-height: 1.8;
        }
        .post-content blockquote {
            margin: 1.75rem 0;
            padding: 1rem 1.5rem;
            background: var(--primary-light);
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text);
        }
        .post-content blockquote p {
            margin: 0.25rem 0;
        }
        .post-content img {
            margin: 1.5rem auto;
            border-radius: var(--radius-sm);
        }
        .post-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            display: block;
            overflow-x: auto;
            border-radius: var(--radius-sm);
        }
        @media (min-width: 768px) {
            .post-content table {
                display: table;
            }
        }
        .post-content th,
        .post-content td {
            border: 1px solid var(--border);
            padding: 0.75rem 1rem;
            text-align: left;
        }
        .post-content th {
            background: var(--bg);
            font-weight: 700;
            color: var(--secondary);
        }
        .post-content code {
            background: var(--bg);
            border: 1px solid var(--border);
            padding: 0.15rem 0.4rem;
            border-radius: 6px;
            font-size: 0.9em;
        }
        .post-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1.75rem;
            padding-top: 1.25rem;
            border-top: 1px solid var(--border);
        }
        .badge {
            display: inline-block;
            background: var(--bg);
            border: 1px solid var(--border);
            padding: 0.3rem 0.8rem;
            border-radius: 999px;
            font-size: 0.78rem;
            color: var(--text-weak);
            font-weight: 500;
            transition: all 0.2s;
        }
        .badge:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
        }
        .post-notfound {
            text-align: center;
            padding: 3rem 1rem;
        }
        .post-notfound .notfound-icon {
            font-size: 3rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }
        .post-notfound h2 {
            font-size: 1.8rem;
            color: var(--secondary);
            margin-bottom: 0.75rem;
        }
        .post-notfound p {
            color: var(--text-weak);
            margin-bottom: 1.5rem;
        }
        .post-notfound .btn {
            display: inline-flex;
        }

        /* ===== 侧边栏 ===== */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            position: sticky;
            top: 86px;
        }
        .side-card {
            background: var(--card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 1.5rem;
            border: 1px solid var(--border);
        }
        .side-card .side-cover {
            width: 100%;
            height: 120px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 1rem;
        }
        .side-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0.85rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .side-card h3 i {
            color: var(--primary);
        }
        .side-info {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }
        .side-info .info-row {
            display: flex;
            justify-content: space-between;
            font-size: 0.88rem;
            gap: 0.75rem;
        }
        .side-info .info-label {
            color: var(--text-weak);
            white-space: nowrap;
        }
        .side-info .info-value {
            color: var(--text);
            font-weight: 500;
            text-align: right;
            overflow-wrap: anywhere;
        }
        .side-nav-list {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .side-nav-item {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.8rem 0.9rem;
            border-radius: var(--radius-sm);
            background: var(--bg);
            transition: all 0.25s ease;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text);
        }
        .side-nav-item:hover {
            background: var(--primary-light);
            color: var(--primary);
            transform: translateX(4px);
        }
        .side-nav-item i {
            width: 20px;
            text-align: center;
            color: var(--primary);
        }
        .side-tip {
            background: linear-gradient(135deg, var(--secondary), #1e293b);
            color: #fff;
            border: none;
        }
        .side-tip h3 {
            color: #fff;
        }
        .side-tip h3 i {
            color: var(--accent);
        }
        .side-tip p {
            font-size: 0.88rem;
            opacity: 0.85;
            margin-bottom: 1rem;
            line-height: 1.7;
        }
        .side-tip .btn {
            width: 100%;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 600;
            transition: all 0.25s ease;
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(230, 57, 70, 0.35);
        }
        .btn-light {
            background: #fff;
            color: var(--secondary);
        }
        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(255, 255, 255, 0.2);
        }
        .btn-outline-light {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: var(--space) 0;
            background: var(--card);
            border-top: 1px solid var(--border);
        }
        .related-section .section-head {
            text-align: center;
            margin-bottom: 2.5rem;
        }
        .related-section .section-head h2 {
            font-size: clamp(1.4rem, 2vw, 1.9rem);
            color: var(--secondary);
            font-weight: 800;
        }
        .related-section .section-head p {
            color: var(--text-weak);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .related-card {
            display: block;
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .related-card .related-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .related-img {
            transform: scale(1.05);
        }
        .related-card-body {
            padding: 1.5rem;
        }
        .related-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0.5rem;
        }
        .related-card-body p {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.65;
        }
        .related-card-body .related-link {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            margin-top: 0.9rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            transition: gap 0.2s;
        }
        .related-card:hover .related-link {
            gap: 0.65rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: var(--space) 0;
            background: linear-gradient(135deg, var(--secondary), #1e293b 60%, var(--primary-dark));
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            top: -120px;
            right: -100px;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            bottom: -60px;
            left: 30px;
        }
        .cta-section .container {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: #fff;
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 800;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1rem;
            max-width: 620px;
            margin: 0 auto 1.75rem;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.7);
            padding: 70px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
        }
        .footer-brand .nav-brand {
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-brand .nav-brand i {
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 0.75rem;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 0.6rem;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: all 0.2s;
        }
        .footer-col ul a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.25rem 0;
            display: flex;
            justify-content: space-between;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        /* ===== 移动端底部导航 ===== */
        .mobile-bottom-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: #fff;
            border-top: 1px solid var(--border);
            box-shadow: 0 -6px 20px rgba(0, 0, 0, 0.05);
            z-index: 100;
            padding: 0.3rem 0;
            padding-bottom: env(safe-area-inset-bottom);
        }
        .mobile-nav-inner {
            display: flex;
            justify-content: space-around;
            align-items: center;
        }
        .mobile-tab {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.15rem;
            padding: 0.4rem 0;
            font-size: 0.75rem;
            color: var(--text-weak);
            transition: color 0.2s;
        }
        .mobile-tab i {
            font-size: 1.15rem;
        }
        .mobile-tab:hover,
        .mobile-tab.active {
            color: var(--primary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .post-layout {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: repeat(3, 1fr);
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .site-header .container {
                height: 56px;
                justify-content: center;
            }
            .nav-links,
            .nav-cta,
            .nav-toggle {
                display: none;
            }
            body {
                padding-bottom: 64px;
            }
            .mobile-bottom-nav {
                display: block;
            }
            .page-hero {
                padding: 58px 0 66px;
            }
            .page-hero h1 {
                font-size: 1.4rem;
            }
            .post-section {
                padding: 40px 0;
            }
            .post-card {
                padding: 1.25rem;
                border-radius: 14px;
            }
            .sidebar {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .related-section {
                padding: 44px 0;
            }
            .cta-section {
                padding: 44px 0;
            }
        }
        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.25rem;
            }
            .post-hero-meta {
                gap: 0.75rem;
                font-size: 0.82rem;
            }
            .cta-buttons {
                flex-direction: column;
            }
            .cta-buttons .btn {
                width: 100%;
            }
            .post-meta-line {
                gap: 0.75rem;
                font-size: 0.82rem;
            }
            .post-content {
                font-size: 0.97rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1b3a5b;
            --primary-dark: #132b45;
            --primary-light: #2b5278;
            --accent: #e0a13a;
            --accent-dark: #c98929;
            --accent-light: #f7e8cc;
            --bg: #f6f8fb;
            --surface: #ffffff;
            --text: #1f2d3d;
            --text-weak: #5e6e82;
            --text-faint: #8a97a8;
            --border: #e6eaf0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 10px rgba(27, 58, 91, 0.06);
            --shadow: 0 6px 24px rgba(27, 58, 91, 0.08);
            --shadow-lg: 0 16px 48px rgba(27, 58, 91, 0.12);
            --transition: all 0.3s ease;
            --container: 1200px;
            --header-height: 72px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }

        .section-header .badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-light);
            color: var(--accent-dark);
            border-radius: 999px;
            padding: 6px 18px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .section-header h2 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--text);
        }

        .section-header p {
            color: var(--text-weak);
            font-size: 16px;
        }

        /* Header */
        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(230, 234, 240, 0.8);
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-height);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 20px;
        }

        .nav-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
        }

        .nav-brand i {
            font-size: 22px;
            color: var(--accent);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            display: inline-block;
            padding: 10px 18px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-weak);
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(27, 58, 91, 0.05);
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--accent-light);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            border-radius: 999px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition);
            box-shadow: 0 2px 10px rgba(27, 58, 91, 0.2);
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(27, 58, 91, 0.3);
        }

        .nav-toggle {
            display: none;
        }

        /* Mobile Bottom Tab */
        .mobile-tab-bar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 110;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            border-top: 1px solid var(--border);
            padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
            justify-content: space-around;
            box-shadow: 0 -4px 24px rgba(27, 58, 91, 0.06);
        }

        .mobile-tab-bar .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 3px;
            padding: 8px 6px;
            border-radius: 12px;
            font-size: 12px;
            color: var(--text-faint);
            min-width: 64px;
            transition: var(--transition);
        }

        .mobile-tab-bar .tab-item i {
            font-size: 18px;
        }

        .mobile-tab-bar .tab-item.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--accent-light);
        }

        /* Hero Banner */
        .page-hero {
            background: linear-gradient(135deg, rgba(27, 58, 91, 0.9) 0%, rgba(19, 43, 69, 0.85) 100%), url('/assets/images/backpic/back-2.png') center/cover;
            padding: 100px 0 90px;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: 50%;
            transform: translateX(-50%);
            width: 120%;
            height: 80px;
            background: var(--bg);
            border-radius: 50% 50% 0 0;
        }

        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(6px);
            border-radius: 999px;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 500;
            color: #f8e6c8;
            margin-bottom: 24px;
        }

        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: 1px;
        }

        .page-hero h1 span {
            color: var(--accent);
        }

        .page-hero .hero-sub {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .hero-meta {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-meta a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
        }

        .hero-meta .btn-primary {
            background: var(--accent);
            color: #1a1a1a;
            box-shadow: 0 6px 20px rgba(224, 161, 58, 0.35);
        }

        .hero-meta .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
        }

        .hero-meta .btn-ghost {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
        }

        .hero-meta .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            background: var(--bg);
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
            font-size: 14px;
        }

        .breadcrumb-wrap .container {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-faint);
        }

        .breadcrumb-wrap a {
            color: var(--text-weak);
        }

        .breadcrumb-wrap a:hover {
            color: var(--primary);
        }

        .breadcrumb-wrap i {
            font-size: 10px;
            color: #c0c8d4;
        }

        .breadcrumb-wrap .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* Stats */
        .stats-section {
            padding: 72px 0 56px;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 28px 24px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }

        .stat-card .stat-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--accent-light);
            color: var(--accent-dark);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 14px;
        }

        .stat-card .stat-num {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-card .stat-label {
            font-size: 14px;
            color: var(--text-weak);
            margin-top: 6px;
        }

        /* Steps */
        .steps-section {
            padding: 72px 0;
            background: var(--surface);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }

        .step-item {
            position: relative;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 24px 28px;
            transition: var(--transition);
        }

        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: rgba(224, 161, 58, 0.5);
        }

        .step-item::before {
            counter-increment: step-counter;
            content: counter(step-counter, decimal-leading-zero);
            position: absolute;
            top: 24px;
            right: 24px;
            font-size: 32px;
            font-weight: 800;
            color: rgba(27, 58, 91, 0.12);
        }

        .step-item .step-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--primary);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* Tutorial Cards Grid */
        .tutorials-section {
            padding: 80px 0;
        }

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

        .tutorial-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .tutorial-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .tutorial-card .card-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }

        .tutorial-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .tutorial-card:hover .card-img img {
            transform: scale(1.05);
        }

        .tutorial-card .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(27, 58, 91, 0.25) 0%, transparent 50%);
        }

        .tutorial-card .card-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(4px);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: 999px;
            padding: 5px 14px;
        }

        .tutorial-card .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .tutorial-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
            line-height: 1.4;
        }

        .tutorial-card .card-body p {
            font-size: 14px;
            color: var(--text-weak);
            flex: 1;
            margin-bottom: 16px;
        }

        .tutorial-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }

        .tutorial-card .card-meta {
            font-size: 13px;
            color: var(--text-faint);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .tutorial-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .tutorial-card .card-link:hover {
            color: var(--accent-dark);
        }

        /* Feature Section */
        .feature-section {
            padding: 72px 0;
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .feature-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .feature-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            position: relative;
            box-shadow: var(--shadow-lg);
        }

        .feature-img img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .feature-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(27, 58, 91, 0.4), transparent 40%);
        }

        .feature-img .img-caption {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            color: #fff;
            font-size: 14px;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .feature-content h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .feature-content h2 span {
            color: var(--accent);
        }

        .feature-content>p {
            color: var(--text-weak);
            margin-bottom: 24px;
            font-size: 15px;
        }

        .feature-list {
            displayed: grid;
            gap: 16px;
        }

        .feature-list li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            background: var(--bg);
            border-radius: var(--radius-sm);
            padding: 14px 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .feature-list li:hover {
            border-color: rgba(224, 161, 58, 0.4);
            background: var(--accent-light);
        }

        .feature-list li i {
            color: var(--accent-dark);
            font-size: 18px;
            margin-top: 2px;
        }

        .feature-list li strong {
            display: block;
            font-size: 15px;
            margin-bottom: 2px;
        }

        .feature-list li span {
            font-size: 13px;
            color: var(--text-weak);
        }

        /* FAQ */
        .faq-section {
            padding: 80px 0;
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: grid;
            gap: 16px;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(224, 161, 58, 0.4);
            box-shadow: var(--shadow-sm);
        }

        .faq-item details {
            padding: 0;
        }

        .faq-item summary {
            cursor: pointer;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            list-style: none;
            user-select: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 14px;
            color: var(--accent);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item details[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.8;
        }

        /* CTA */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%), url('/assets/images/backpic/back-3.png') center/cover;
            background-blend-mode: multiply;
            color: #fff;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 34px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cta-section p {
            max-width: 560px;
            margin: 0 auto 32px;
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .cta-buttons a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
        }

        .cta-buttons .cta-btn-primary {
            background: var(--accent);
            color: #1a1a1a;
            box-shadow: 0 6px 24px rgba(224, 161, 58, 0.4);
        }

        .cta-buttons .cta-btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
        }

        .cta-buttons .cta-btn-outline {
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            background: rgba(255, 255, 255, 0.1);
        }

        .cta-buttons .cta-btn-outline:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .site-footer .nav-brand {
            color: #fff;
            margin-bottom: 14px;
            display: inline-flex;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 16px;
            color: #fff;
            margin-bottom: 20px;
            font-weight: 600;
        }

        .footer-col ul {
            display: grid;
            gap: 12px;
        }

        .footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .tutorials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .feature-img img {
                height: 320px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .nav-links,
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
                font-size: 20px;
                color: var(--primary);
                padding: 8px;
            }
            .mobile-tab-bar {
                display: flex;
            }
            body {
                padding-bottom: 70px;
            }
            .page-hero {
                padding: 72px 0 80px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero .hero-sub {
                font-size: 15px;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .tutorials-grid,
            .steps-grid,
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .hero-meta {
                flex-direction: column;
                align-items: center;
            }
            .hero-meta a {
                width: 100%;
                justify-content: center;
            }
            .feature-list li {
                padding: 12px;
            }
            .faq-item summary {
                padding: 16px;
            }
            .faq-item .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* Utilities */
        .text-accent {
            color: var(--accent);
        }

/* roulang page: category3 */
:root {
  --primary: #1d4ed8;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --secondary: #f59e0b;
  --accent: #10b981;
  --dark-bg: #0d1530;
  --light-bg: #f4f7fc;
  --card-bg: #ffffff;
  --text-main: #1a2233;
  --text-sub: #5a6a82;
  --text-weak: #93a1b5;
  --border-color: #e6eaf2;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 12px rgba(15, 35, 80, .06);
  --shadow-md: 0 8px 30px rgba(15, 35, 80, .10);
  --shadow-lg: 0 20px 50px rgba(15, 35, 80, .14);
  --font-main: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container-w: 1200px;
  --header-h: 72px;
  --tabbar-h: 64px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--light-bg);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input {
  font-family: inherit;
}

ul,
ol {
  list-style: none;
}

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(230, 234, 242, .8);
  z-index: 1000;
  box-shadow: 0 2px 16px rgba(15, 35, 80, .05);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 20px;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: .5px;
  white-space: nowrap;
}

.nav-brand i {
  font-size: 24px;
  color: var(--secondary);
  transition: transform .3s ease;
}

.nav-brand:hover i {
  transform: rotate(-8deg) scale(1.08);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  position: relative;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  transition: all .25s ease;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(29, 78, 216, .06);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(29, 78, 216, .08);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  border-radius: 3px;
  background: var(--secondary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(29, 78, 216, .32);
  transition: all .3s ease;
  white-space: nowrap;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(29, 78, 216, .4);
}

.nav-cta:active {
  transform: translateY(0);
}

.nav-toggle {
  display: none;
  font-size: 22px;
  color: var(--text-main);
  width: 42px;
  height: 42px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  transition: background .2s;
}

.nav-toggle:hover {
  background: rgba(15, 35, 80, .06);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ===== Bottom Tab (mobile) ===== */
.bottom-tab-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--tabbar-h);
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-color);
  box-shadow: 0 -4px 20px rgba(15, 23, 42, .06);
  z-index: 9999;
}

.bottom-tab-nav .tab-inner {
  display: flex;
  height: 100%;
  align-items: stretch;
}

.tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: var(--text-weak);
  font-size: 12px;
  font-weight: 500;
  transition: color .25s;
}

.tab-item i {
  font-size: 20px;
  transition: transform .25s, color .25s;
}

.tab-item:hover {
  color: var(--primary);
}

.tab-item.active {
  color: var(--primary);
}

.tab-item.active i {
  transform: scale(1.12) translateY(-1px);
}

.tab-item:active i {
  transform: scale(.96);
}

/* ===== Page Banner ===== */
.page-banner {
  position: relative;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  padding: 110px 0 90px;
  color: #fff;
  text-align: center;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 20, 50, .88) 0%, rgba(29, 78, 216, .72) 100%);
  z-index: 1;
}

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

.banner-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  border-radius: 30px;
  background: rgba(255, 255, 255, .15);
  border: 1px solid rgba(255, 255, 255, .25);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  margin-bottom: 24px;
  backdrop-filter: blur(6px);
}

.banner-tag i {
  color: var(--secondary);
}

.page-banner h1 {
  font-size: clamp(30px, 5vw, 48px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 1px;
  margin-bottom: 18px;
}

.page-banner h1 span {
  color: var(--secondary);
}

.banner-sub {
  font-size: clamp(14px, 2vw, 17px);
  color: rgba(255, 255, 255, .82);
  max-width: 560px;
  margin: 0 auto 28px;
  line-height: 1.8;
}

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 20px;
  border-radius: 30px;
  background: rgba(0, 0, 0, .25);
  border: 1px solid rgba(255, 255, 255, .15);
  font-size: 14px;
  backdrop-filter: blur(6px);
}

.breadcrumb a {
  color: rgba(255, 255, 255, .7);
  transition: color .2s;
}

.breadcrumb a:hover {
  color: var(--secondary);
}

.breadcrumb i {
  font-size: 10px;
  color: rgba(255, 255, 255, .5);
}

.breadcrumb span {
  color: #fff;
  font-weight: 500;
}

/* ===== News Section ===== */
.news-section {
  padding: 80px 0 70px;
}

.news-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 42px;
}

.tab-btn {
  padding: 9px 22px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
  background: #fff;
  border: 1px solid var(--border-color);
  transition: all .3s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.tab-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(29, 78, 216, .04);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(29, 78, 216, .3);
}

.tab-btn.active:hover {
  color: #fff;
}

.tab-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.news-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 36px;
  align-items: start;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.news-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease;
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.news-thumb {
  position: relative;
  height: 190px;
  overflow: hidden;
}

.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s ease;
}

.news-card:hover .news-thumb img {
  transform: scale(1.06);
}

.news-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13, 21, 48, .28), transparent 55%);
}

.news-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 14px;
  border-radius: 20px;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(6px);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(15, 23, 42, .1);
}

.news-tag i {
  font-size: 11px;
  color: var(--secondary);
}

.news-body {
  padding: 20px 22px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.news-body h3 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 10px;
}

.news-body h3 a {
  color: var(--text-main);
  transition: color .2s;
}

.news-body h3 a:hover {
  color: var(--primary);
}

.news-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 13px;
  color: var(--text-weak);
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}

.news-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.news-meta i {
  color: var(--primary-light);
  font-size: 13px;
}

/* ===== Hot Sidebar ===== */
.hot-sidebar {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  padding: 26px 24px;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.hot-sidebar .sidebar-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}

.hot-sidebar .sidebar-head .icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--secondary), #fbbf24);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 17px;
  box-shadow: 0 4px 12px rgba(245, 158, 11, .35);
}

.hot-sidebar .sidebar-head h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
}

.hot-sidebar .sidebar-head p {
  font-size: 12px;
  color: var(--text-weak);
}

.hot-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hot-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 12px;
  border-radius: 12px;
  cursor: pointer;
  transition: background .25s, transform .2s;
}

.hot-item:hover {
  background: rgba(29, 78, 216, .045);
  transform: translateX(3px);
}

.hot-rank {
  font-size: 20px;
  font-weight: 800;
  color: var(--border-color);
  font-style: italic;
  width: 30px;
  text-align: center;
  flex-shrink: 0;
}

.hot-item:nth-child(1) .hot-rank {
  color: #f5a623;
}

.hot-item:nth-child(2) .hot-rank {
  color: #94a3b8;
}

.hot-item:nth-child(3) .hot-rank {
  color: #d97706;
}

.hot-info {
  flex: 1;
  min-width: 0;
}

.hot-info h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hot-info span {
  font-size: 12px;
  color: var(--text-weak);
}

.hot-info span i {
  color: var(--primary-light);
  margin-right: 4px;
}

.hot-item:hover h4 {
  color: var(--primary);
}

.hot-more {
  display: block;
  text-align: center;
  margin-top: 18px;
  padding: 10px 16px;
  border-radius: 12px;
  background: var(--light-bg);
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
  transition: all .25s;
}

.hot-more:hover {
  background: rgba(29, 78, 216, .08);
  color: var(--primary-dark);
}

/* ===== Stats Section ===== */
.stats-section {
  background: linear-gradient(135deg, #0d1530 0%, #1e3a8a 100%);
  padding: 70px 0;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .04);
}

.stats-section::after {
  content: '';
  position: absolute;
  bottom: -120px;
  left: -60px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(245, 158, 11, .05);
}

.stats-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-item {
  text-align: center;
  padding: 24px 16px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .1);
  backdrop-filter: blur(8px);
  transition: transform .3s, background .3s;
}

.stat-item:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, .1);
}

.stat-icon {
  font-size: 28px;
  color: var(--secondary);
  margin-bottom: 12px;
}

.stat-num {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: 1px;
  line-height: 1.2;
  margin-bottom: 6px;
}

.stat-num em {
  font-style: normal;
  font-size: 22px;
  color: var(--secondary);
}

.stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, .68);
  letter-spacing: 1px;
}

/* ===== Subscribe CTA ===== */
.subscribe-section {
  padding: 80px 0;
}

.subscribe-box {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary) 50%, var(--primary-light));
  padding: 56px 60px;
  text-align: center;
  color: #fff;
  box-shadow: var(--shadow-lg);
}

.subscribe-box::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .06);
}

.subscribe-box::after {
  content: '';
  position: absolute;
  bottom: -80%;
  left: -10%;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(245, 158, 11, .1);
}

.subscribe-inner {
  position: relative;
  z-index: 2;
  max-width: 560px;
  margin: 0 auto;
}

.subscribe-box h2 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 12px;
}

.subscribe-box h2 i {
  color: var(--secondary);
  margin-right: 8px;
}

.subscribe-box p {
  font-size: 15px;
  color: rgba(255, 255, 255, .8);
  margin-bottom: 28px;
  line-height: 1.7;
}

.subscribe-form {
  display: flex;
  align-items: center;
  gap: 0;
  background: #fff;
  border-radius: 50px;
  padding: 6px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .12);
}

.subscribe-form input {
  flex: 1;
  border: none;
  padding: 12px 20px;
  font-size: 15px;
  color: var(--text-main);
  background: transparent;
  outline: none;
  min-width: 0;
}

.subscribe-form input::placeholder {
  color: var(--text-weak);
}

.subscribe-form button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--secondary), #fbbf24);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: transform .2s, box-shadow .2s;
}

.subscribe-form button:hover {
  transform: scale(1.03);
  box-shadow: 0 6px 18px rgba(245, 158, 11, .4);
}

.subscribe-form button:active {
  transform: scale(.98);
}

.subscribe-form button:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.subscribe-tip {
  margin-top: 14px;
  font-size: 13px;
  color: rgba(255, 255, 255, .65);
}

.subscribe-tip i {
  color: var(--secondary);
}

/* ===== FAQ Section ===== */
.faq-section {
  padding: 20px 0 80px;
}

.section-head {
  text-align: center;
  margin-bottom: 44px;
}

.section-head .section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 18px;
  border-radius: 30px;
  background: rgba(29, 78, 216, .08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 10px;
}

.section-head p {
  font-size: 15px;
  color: var(--text-sub);
  max-width: 560px;
  margin: 0 auto;
}

.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: box-shadow .3s, border-color .3s;
}

.faq-item.active {
  border-color: rgba(29, 78, 216, .3);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  transition: color .2s;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-question .q-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(29, 78, 216, .08);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.faq-question .q-arrow {
  margin-left: auto;
  font-size: 14px;
  color: var(--text-weak);
  transition: transform .3s ease;
}

.faq-item.active .faq-question .q-arrow {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px 70px;
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.8;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--dark-bg);
  color: rgba(255, 255, 255, .75);
  padding: 60px 0 0;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.footer-brand .nav-brand {
  color: #fff;
  font-size: 22px;
  margin-bottom: 14px;
}

.footer-brand .nav-brand i {
  color: var(--secondary);
}

.footer-brand p {
  color: rgba(255, 255, 255, .55);
  line-height: 1.8;
  max-width: 320px;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li a {
  color: rgba(255, 255, 255, .55);
  transition: all .25s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-col ul li a::before {
  content: '›';
  font-size: 16px;
  color: var(--secondary);
  opacity: .7;
  transition: transform .2s;
}

.footer-col ul li a:hover {
  color: #fff;
  transform: translateX(3px);
}

.footer-col ul li a:hover::before {
  transform: translateX(2px);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  flex-wrap: wrap;
  color: rgba(255, 255, 255, .4);
  font-size: 13px;
}

.footer-bottom a {
  color: rgba(255, 255, 255, .4);
  transition: color .2s;
}

.footer-bottom a:hover {
  color: var(--secondary);
}

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

  .hot-sidebar {
    position: static;
  }

  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .subscribe-box {
    padding: 46px 32px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 20px;
    background: rgba(255, 255, 255, .98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 16px 40px rgba(15, 23, 42, .1);
    transform: translateY(-120%);
    transition: transform .35s ease;
    z-index: 998;
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-link {
    padding: 14px 16px;
    font-size: 15px;
    border-radius: 12px;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .bottom-tab-nav {
    display: block;
  }

  body {
    padding-bottom: var(--tabbar-h);
  }

  .page-banner {
    padding: 80px 0 60px;
  }

  .news-section {
    padding: 60px 0 50px;
  }

  .news-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .subscribe-form {
    flex-direction: column;
    border-radius: 24px;
    padding: 12px;
    gap: 10px;
  }

  .subscribe-form input {
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    width: 100%;
    padding: 12px 16px;
  }

  .subscribe-form button {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 520px) {
  :root {
    --header-h: 62px;
    --tabbar-h: 58px;
  }

  .container {
    padding: 0 16px;
  }

  .nav-brand {
    font-size: 19px;
  }

  .nav-brand i {
    font-size: 20px;
  }

  .page-banner {
    padding: 60px 0 46px;
  }

  .page-banner h1 {
    font-size: 28px;
  }

  .banner-tag {
    padding: 5px 14px;
    font-size: 12px;
  }

  .news-grid {
    gap: 18px;
  }

  .news-body {
    padding: 16px 16px 18px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .stat-item {
    padding: 18px 12px;
  }

  .stat-num {
    font-size: 28px;
  }

  .stat-num em {
    font-size: 16px;
  }

  .subscribe-box {
    padding: 36px 20px;
  }

  .subscribe-box h2 {
    font-size: 22px;
  }

  .faq-question {
    padding: 16px 16px;
    font-size: 15px;
  }

  .faq-answer-inner {
    padding: 0 16px 16px 56px;
    font-size: 14px;
  }

  .tab-btn {
    padding: 7px 16px;
    font-size: 13px;
  }

  .footer-brand p {
    font-size: 14px;
  }
}