/* roulang page: index */
:root {
  --primary: #e85d3f;
  --primary-dark: #c94a2e;
  --secondary: #2d3142;
  --accent: #6c63ff;
  --bg: #f9f8f5;
  --surface: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --border: #eae8e3;
  --radius: 16px;
  --shadow-sm: 0 2px 10px rgba(45, 49, 66, .06);
  --shadow-lg: 0 18px 45px rgba(45, 49, 66, .10);
  --transition: all .3s ease;
}
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; display: block; }
button { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-alt { background: #fff; }
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  background: rgba(232, 93, 63, .10);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .5px;
}
.section-head { text-align: center; max-width: 680px; margin: 0 auto 52px; }
.section-head h2 {
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 800;
  line-height: 1.25;
  margin-top: 14px;
  margin-bottom: 14px;
  letter-spacing: -1px;
}
.section-head p { color: var(--muted); font-size: 16px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -.5px;
}
.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--primary), #f39c12);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  font-weight: 900;
  box-shadow: 0 4px 14px rgba(232, 93, 63, .35);
  flex-shrink: 0;
}
.logo-text { white-space: nowrap; }
.desktop-nav { display: flex; gap: 6px; }
.nav-link {
  padding: 9px 18px;
  border-radius: 10px;
  font-weight: 500;
  font-size: 15px;
  color: var(--text);
  transition: var(--transition);
}
.nav-link:hover { background: rgba(232, 93, 63, .08); color: var(--primary); }
.nav-link.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(232, 93, 63, .3);
}
.header-cta { margin-left: 10px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  line-height: 1.4;
}
.btn:active { transform: translateY(0) scale(.97); }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 22px rgba(232, 93, 63, .35);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(232, 93, 63, .42);
}
.btn-ghost {
  background: rgba(255, 255, 255, .12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .35);
  backdrop-filter: blur(4px);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, .22);
  transform: translateY(-2px);
}
.btn-light {
  background: #fff;
  color: var(--secondary);
  box-shadow: 0 6px 20px rgba(0, 0, 0, .10);
}
.btn-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, .15);
}
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(232, 93, 63, .40);
  outline-offset: 3px;
  border-radius: 6px;
}

/* Hero */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  background: linear-gradient(115deg, rgba(45, 49, 66, .94), rgba(45, 49, 66, .72)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.hero-inner {
  padding: 90px 0;
  max-width: 780px;
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  border-radius: 24px;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .28);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 22px;
  backdrop-filter: blur(4px);
}
.hero h1 {
  font-size: clamp(38px, 6vw, 58px);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -2px;
}
.hero p {
  font-size: 18px;
  line-height: 1.8;
  opacity: .92;
  margin-bottom: 34px;
  max-width: 640px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  margin-top: 52px;
  padding-top: 34px;
  border-top: 1px solid rgba(255, 255, 255, .20);
  max-width: 520px;
}
.stat-item { display: flex; flex-direction: column; gap: 2px; }
.stat-item strong { font-size: 30px; font-weight: 800; line-height: 1.2; }
.stat-item span { font-size: 14px; opacity: .75; }

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-image {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.about-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(45, 49, 66, .25));
  pointer-events: none;
}
.about-image img { width: 100%; height: 420px; object-fit: cover; }
.about-content h2 {
  font-size: clamp(26px, 3.5vw, 36px);
  font-weight: 800;
  line-height: 1.3;
  margin: 14px 0 18px;
  letter-spacing: -1px;
}
.about-content p { color: var(--muted); font-size: 16px; margin-bottom: 24px; }
.about-list { list-style: none; margin-bottom: 28px; }
.about-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 0;
  font-size: 15px;
  color: var(--text);
}
.about-list li i {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(232, 93, 63, .12);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
  margin-top: 3px;
}

/* Category cards */
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.category-card {
  background: var(--surface);
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.category-img { position: relative; height: 230px; overflow: hidden; }
.category-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.category-card:hover .category-img img { transform: scale(1.05); }
.category-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(45, 49, 66, .40));
}
.category-body { padding: 28px 30px; display: flex; flex-direction: column; flex: 1; }
.category-badge {
  display: inline-block;
  align-self: flex-start;
  padding: 4px 14px;
  border-radius: 16px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(232, 93, 63, .10);
  color: var(--primary);
  margin-bottom: 14px;
}
.category-body h3 { font-size: 22px; font-weight: 700; margin-bottom: 10px; }
.category-body p { color: var(--muted); font-size: 15px; flex: 1; margin-bottom: 18px; }
.category-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  color: var(--primary);
}
.category-link i { transition: transform .3s ease; }
.category-card:hover .category-link i { transform: translateX(4px); }

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--surface);
  border-radius: 20px;
  padding: 34px 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), #f39c12);
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(232, 93, 63, .12), rgba(108, 99, 255, .12));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 20px;
}
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--muted); font-size: 14px; line-height: 1.7; }

/* News */
.news-section { background: #fff; }
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.news-card {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  border-radius: 18px;
  padding: 26px 28px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.news-card:hover {
  background: #fff;
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: rgba(232, 93, 63, .25);
}
.news-category {
  align-self: flex-start;
  padding: 3px 12px;
  border-radius: 14px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(108, 99, 255, .10);
  color: var(--accent);
  margin-bottom: 14px;
}
.news-card h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}
.news-card time { font-size: 13px; color: var(--muted); }
.empty-tip {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 20px;
  background: var(--bg);
  border-radius: 18px;
  color: var(--muted);
  border: 1px dashed var(--border);
}
.section-foot-link {
  text-align: center;
  margin-top: 32px;
}
.section-foot-link a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--primary);
  font-size: 15px;
}
.section-foot-link a:hover { color: var(--primary-dark); gap: 12px; }

/* Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.step-card {
  background: var(--surface);
  border-radius: 20px;
  padding: 34px 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  text-align: center;
}
.step-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #f39c12);
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  box-shadow: 0 6px 16px rgba(232, 93, 63, .30);
}
.step-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.step-card p { color: var(--muted); font-size: 14px; line-height: 1.7; }

/* FAQ */
.faq-section { background: #fff; }
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 26px;
  margin-bottom: 14px;
  transition: var(--transition);
}
.faq-item:hover {
  border-color: rgba(232, 93, 63, .30);
  box-shadow: var(--shadow-sm);
}
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  color: var(--text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(232, 93, 63, .10);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.faq-item p {
  margin-top: 14px;
  color: var(--muted);
  line-height: 1.8;
  font-size: 15px;
}

/* CTA */
.cta-section {
  position: relative;
  padding: 100px 0;
  background: linear-gradient(120deg, rgba(45, 49, 66, .90), rgba(232, 93, 63, .45)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #fff;
  text-align: center;
}
.cta-inner { max-width: 640px; margin: 0 auto; }
.cta-inner h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -1px;
}
.cta-inner p { font-size: 17px; opacity: .9; margin-bottom: 32px; }

/* Footer */
.site-footer {
  background: #1a1d2b;
  color: #aab;
  padding-top: 60px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-brand .logo-text {
  color: #fff;
  font-size: 20px;
  font-weight: 800;
}
.footer-brand p { margin-top: 14px; font-size: 14px; line-height: 1.8; opacity: .75; }
.footer-links h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-links a {
  display: block;
  padding: 5px 0;
  font-size: 14px;
  opacity: .75;
  transition: var(--transition);
}
.footer-links a:hover { opacity: 1; color: var(--primary); padding-left: 6px; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .10);
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  opacity: .6;
}

/* Mobile Tabbar */
.mobile-tabbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--border);
  display: none;
  box-shadow: 0 -4px 20px rgba(45, 49, 66, .06);
}
.tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 9px 4px;
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  gap: 3px;
  transition: var(--transition);
}
.tab-item i { font-size: 20px; }
.tab-item span { font-size: 12px; }
.tab-item:hover { color: var(--primary); }
.tab-item.active { color: var(--primary); }

/* Responsive */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { gap: 40px; }
}
@media (max-width: 768px) {
  .desktop-nav { display: none; }
  .header-cta { display: none; }
  .mobile-tabbar { display: flex; }
  body { padding-bottom: 62px; }
  .section { padding: 60px 0; }
  .hero { min-height: 520px; }
  .hero-inner { padding: 70px 0; }
  .hero h1 { font-size: 36px; }
  .hero p { font-size: 16px; }
  .about-grid { grid-template-columns: 1fr; }
  .about-image img { height: 300px; }
  .category-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-stats { gap: 20px; }
  .stat-item strong { font-size: 24px; }
}
@media (max-width: 520px) {
  .features-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .header-inner { height: 62px; }
  .logo { font-size: 17px; }
  .logo-mark { width: 32px; height: 32px; font-size: 16px; }
  .container { padding: 0 18px; }
  .btn { padding: 11px 20px; font-size: 14px; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; }
}

/* roulang page: article */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-light: #a5b4fc;
  --accent: #06b6d4;
  --accent-light: #22d3ee;
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #1e293b;
  --text-sub: #64748b;
  --border-soft: #e2e8f0;
  --shadow-xs: 0 1px 3px rgba(15,23,42,.04);
  --shadow-sm: 0 4px 20px rgba(15,23,42,.06);
  --shadow-md: 0 8px 30px rgba(15,23,42,.08);
  --shadow-lg: 0 20px 50px rgba(15,23,42,.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-page);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
}
img {
  max-width: 100%;
  display: block;
}
button, input, textarea {
  font-family: inherit;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
  transition: box-shadow .3s;
}
.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 1.2rem;
  font-weight: 800;
  box-shadow: 0 4px 14px rgba(79,70,229,.35);
}
.logo-text {
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
}
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  padding: 8px 18px;
  font-size: .95rem;
  font-weight: 500;
  color: var(--text-sub);
  border-radius: 999px;
  transition: all .25s;
  position: relative;
}
.nav-link:hover {
  color: var(--primary);
  background: rgba(79,70,229,.07);
}
.nav-link.active {
  color: var(--primary);
  background: rgba(79,70,229,.1);
  font-weight: 600;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 999px;
  font-size: .93rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all .28s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), #6366f1);
  color: #fff;
  box-shadow: 0 4px 16px rgba(79,70,229,.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(79,70,229,.4);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,.6);
  backdrop-filter: blur(4px);
}
.btn-outline:hover {
  background: rgba(255,255,255,.12);
  border-color: #fff;
}
.header-cta {
  padding: 9px 20px;
  font-size: .88rem;
}
/* Article Hero */
.article-hero {
  position: relative;
  padding: 88px 0 72px;
  background-image: linear-gradient(135deg, rgba(7,18,42,.88), rgba(79,70,229,.72)), url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  color: #fff;
}
.article-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 20%, rgba(6,182,212,.2), transparent 60%);
  pointer-events: none;
}
.article-hero .container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: .87rem;
  color: rgba(255,255,255,.78);
  margin-bottom: 22px;
}
.breadcrumb a {
  color: rgba(255,255,255,.85);
  transition: color .2s;
}
.breadcrumb a:hover {
  color: #fff;
}
.breadcrumb .sep {
  color: rgba(255,255,255,.4);
}
.article-hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.35;
  max-width: 820px;
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0,0,0,.2);
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-bottom: 6px;
}
.article-meta .badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(255,255,255,.16);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,.2);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 500;
  color: #fff;
}
/* Article Main */
.article-main-wrapper {
  padding: 56px 0 64px;
}
.article-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
}
.article-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  padding: 42px;
}
.article-content {
  font-size: 1.02rem;
  color: #334155;
}
.article-content h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 1.8rem 0 .8rem;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(79,70,229,.14);
}
.article-content h3 {
  font-size: 1.2rem;
  font-weight: 650;
  color: var(--text-main);
  margin: 1.5rem 0 .6rem;
}
.article-content p {
  line-height: 1.95;
  margin-bottom: 1.15rem;
}
.article-content ul,
.article-content ol {
  margin: 0 0 1.2rem 1.4rem;
  line-height: 1.9;
}
.article-content ul {
  list-style: disc;
}
.article-content ol {
  list-style: decimal;
}
.article-content li {
  margin-bottom: .45rem;
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(79,70,229,.05);
  padding: 14px 20px;
  border-radius: 0 12px 12px 0;
  margin: 1.3rem 0;
  color: #475569;
  font-style: italic;
}
.article-content img {
  border-radius: var(--radius-md);
  margin: 1.4rem 0;
  box-shadow: var(--shadow-sm);
}
.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.4rem 0;
  font-size: .94rem;
}
.article-content th,
.article-content td {
  border: 1px solid var(--border-soft);
  padding: 10px 14px;
  text-align: left;
}
.article-content th {
  background: #f1f5f9;
  font-weight: 600;
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border-soft);
}
.tag {
  display: inline-block;
  padding: 6px 16px;
  background: #f1f5f9;
  color: var(--text-sub);
  font-size: .82rem;
  font-weight: 500;
  border-radius: 999px;
  transition: all .25s;
  cursor: default;
}
.tag:hover {
  background: rgba(79,70,229,.1);
  color: var(--primary);
}
/* Not Found */
.not-found-card {
  text-align: center;
  padding: 60px 30px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border-soft);
}
.not-found-card i {
  font-size: 3rem;
  color: #cbd5e1;
  margin-bottom: 16px;
}
.not-found-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.not-found-card p {
  color: var(--text-sub);
  margin-bottom: 26px;
}
/* Sidebar */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.side-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  padding: 24px;
  box-shadow: var(--shadow-xs);
  transition: box-shadow .3s;
}
.side-card:hover {
  box-shadow: var(--shadow-sm);
}
.side-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.side-card h3 i {
  color: var(--primary);
}
.side-info-list {
  list-style: none;
}
.side-info-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 0;
  border-bottom: 1px solid #f1f5f9;
  font-size: .88rem;
}
.side-info-list li:last-child {
  border-bottom: none;
}
.side-info-list .label {
  color: var(--text-sub);
}
.side-info-list .value {
  font-weight: 600;
  color: var(--text-main);
}
.side-desc {
  font-size: .88rem;
  color: var(--text-sub);
  line-height: 1.8;
}
.side-nav-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.side-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 16px;
  background: #f8fafc;
  border-radius: 12px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-main);
  transition: all .25s;
}
.side-nav-link:hover {
  background: rgba(79,70,229,.08);
  color: var(--primary);
  transform: translateX(4px);
}
.side-nav-link i {
  color: var(--primary);
  font-size: .85rem;
}
/* Related */
.related-section {
  padding: 56px 0 64px;
  background: #f1f5f9;
}
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 36px;
  gap: 20px;
}
.section-header h2 {
  font-size: 1.7rem;
  font-weight: 800;
  position: relative;
}
.section-header h2::after {
  content: '';
  display: block;
  width: 48px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  margin-top: 10px;
}
.section-more {
  font-size: .9rem;
  color: var(--primary);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .25s;
}
.section-more:hover {
  gap: 10px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  overflow: hidden;
  transition: all .3s;
}
.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.related-card .cover {
  aspect-ratio: 16/10;
  overflow: hidden;
  position: relative;
}
.related-card .cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s;
}
.related-card:hover .cover img {
  transform: scale(1.05);
}
.related-card .body {
  padding: 18px 20px 22px;
}
.related-card .body h4 {
  font-size: .98rem;
  font-weight: 650;
  line-height: 1.5;
  margin-bottom: 8px;
  transition: color .2s;
}
.related-card:hover .body h4 {
  color: var(--primary);
}
.related-card .body p {
  font-size: .86rem;
  color: var(--text-sub);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
/* FAQ */
.faq-section {
  padding: 64px 0;
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 22px 28px;
  transition: box-shadow .3s;
}
.faq-item:hover {
  box-shadow: var(--shadow-sm);
}
.faq-item h3 {
  font-size: .98rem;
  font-weight: 650;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.faq-item h3 span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: rgba(79,70,229,.1);
  color: var(--primary);
  border-radius: 6px;
  font-size: .75rem;
  font-weight: 800;
  flex-shrink: 0;
}
.faq-item p {
  font-size: .92rem;
  color: var(--text-sub);
  line-height: 1.8;
  padding-left: 32px;
}
/* CTA */
.cta-section {
  padding: 0 0 72px;
}
.cta-box {
  position: relative;
  border-radius: var(--radius-xl);
  background-image: linear-gradient(135deg, #1e1b4b, #4f46e5 60%, #06b6d4);
  background-size: cover;
  background-position: center;
  padding: 60px 48px;
  text-align: center;
  color: #fff;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.cta-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 20%, rgba(255,255,255,.1), transparent 55%);
  pointer-events: none;
}
.cta-box h2 {
  font-size: 1.7rem;
  font-weight: 800;
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
}
.cta-box p {
  font-size: 1rem;
  color: rgba(255,255,255,.85);
  max-width: 560px;
  margin: 0 auto 30px;
  line-height: 1.7;
  position: relative;
  z-index: 2;
}
.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  position: relative;
  z-index: 2;
}
/* Footer */
.site-footer {
  background: #0f172a;
  color: rgba(255,255,255,.75);
  padding: 56px 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  padding-bottom: 44px;
}
.footer-brand .logo-text {
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 14px;
  display: inline-block;
}
.footer-brand p {
  font-size: .9rem;
  line-height: 1.85;
  max-width: 460px;
  color: rgba(255,255,255,.55);
}
.footer-links h4 {
  color: #fff;
  font-size: .95rem;
  font-weight: 650;
  margin-bottom: 16px;
}
.footer-links a {
  display: block;
  font-size: .9rem;
  color: rgba(255,255,255,.58);
  margin-bottom: 12px;
  transition: all .2s;
}
.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 18px 0;
  text-align: center;
  font-size: .85rem;
  color: rgba(255,255,255,.4);
}
/* Mobile Tabbar */
.mobile-tabbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  display: none;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--border-soft);
  padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
  box-shadow: 0 -4px 20px rgba(15,23,42,.05);
}
.mobile-tabbar .tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 4px;
  font-size: .74rem;
  font-weight: 500;
  color: var(--text-sub);
  border-radius: 12px;
  transition: all .25s;
}
.mobile-tabbar .tab-item i {
  font-size: 1.15rem;
  margin-bottom: 3px;
}
.mobile-tabbar .tab-item.active {
  color: var(--primary);
  background: rgba(79,70,229,.1);
}
.mobile-tabbar .tab-item:hover {
  color: var(--primary);
}
/* Responsive */
@media (max-width: 1024px) {
  .article-grid {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .desktop-nav,
  .header-cta {
    display: none;
  }
  .header-inner {
    height: 60px;
  }
  .article-hero {
    padding: 60px 0 48px;
  }
  .article-card {
    padding: 24px 20px;
  }
  .sidebar {
    grid-template-columns: 1fr;
  }
  .cta-box {
    padding: 42px 24px;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .mobile-tabbar {
    display: flex;
  }
  .site-footer {
    padding-bottom: 72px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }
  .article-card {
    padding: 20px 16px;
  }
  .article-content {
    font-size: .97rem;
  }
  .faq-item {
    padding: 18px 18px;
  }
  .faq-item p {
    padding-left: 0;
  }
  .cta-box {
    border-radius: 20px;
  }
}

/* roulang page: category1 */
:root {
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-primary-light: #eef2ff;
  --color-accent: #f59e0b;
  --color-accent-light: #fef3c7;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.06);
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 50px rgba(15, 23, 42, 0.12);
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.02);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.2px;
  white-space: nowrap;
}
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.nav-link {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-muted);
  transition: all 0.25s ease;
}
.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}
.nav-link.active {
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
  font-weight: 600;
}
.header-cta {
  margin-left: 6px;
  flex-shrink: 0;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.3s ease;
  line-height: 1.4;
}
.btn:focus-visible {
  outline: 3px solid rgba(99, 102, 241, 0.35);
  outline-offset: 2px;
}
.btn-primary {
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.8);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: #fff;
}
.btn-light {
  background: #fff;
  color: var(--color-primary-dark);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}
.btn-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}
.btn-lg { padding: 14px 32px; font-size: 16px; }

/* 分类页 Hero */
.cat-hero {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 100px 0 110px;
  isolation: isolate;
}
.cat-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 27, 75, 0.72) 45%, rgba(99, 102, 241, 0.45) 100%);
  z-index: -1;
}
.cat-hero-inner {
  display: flex;
  align-items: center;
  min-height: 320px;
}
.cat-hero-content {
  max-width: 680px;
}
.cat-hero-content .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  backdrop-filter: blur(6px);
  margin-bottom: 22px;
}
.cat-hero-content h1 {
  color: #fff;
  font-size: 44px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.cat-hero-content h1 .highlight {
  background: linear-gradient(120deg, #fbbf24, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cat-hero-content p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 17px;
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 540px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* 通用板块 */
.section {
  padding: 90px 0;
}
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.35;
  margin-bottom: 14px;
}
.section-head p {
  color: var(--color-muted);
  font-size: 16px;
  line-height: 1.8;
}

/* 数据统计 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s ease;
}
.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(99, 102, 241, 0.3);
}
.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin: 0 auto 16px;
}
.stat-number {
  font-size: 34px;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.2;
}
.stat-label {
  color: var(--color-muted);
  font-size: 14px;
  margin-top: 6px;
}

/* 入口卡片网格 */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.entry-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}
.entry-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(99, 102, 241, 0.35);
}
.entry-card-cover {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.entry-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.entry-card:hover .entry-card-cover img {
  transform: scale(1.05);
}
.entry-card-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(15, 23, 42, 0.25) 100%);
}
.entry-card-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--color-primary-dark);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  z-index: 2;
}
.entry-card-body {
  padding: 26px 28px 30px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.entry-card-body h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text);
}
.entry-card-body p {
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.75;
  flex: 1;
}
.entry-card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
  margin-top: 20px;
  transition: gap 0.3s ease;
}
.entry-card-link:hover {
  gap: 12px;
  color: var(--color-primary-dark);
}

/* 使用流程 */
.steps-section {
  background: linear-gradient(160deg, #0f172a 0%, #1e1b4b 60%, #312e81 100%);
  color: #fff;
}
.steps-section .section-tag {
  background: rgba(255, 255, 255, 0.12);
  color: #fbbf24;
}
.steps-section .section-head h2 { color: #fff; }
.steps-section .section-head p { color: rgba(255, 255, 255, 0.7); }
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.step-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 36px 28px;
  backdrop-filter: blur(8px);
  transition: all 0.35s ease;
  position: relative;
}
.step-card:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
  border-color: rgba(251, 191, 36, 0.35);
}
.step-number {
  font-size: 48px;
  font-weight: 800;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 20px;
  display: block;
}
.step-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: #fff;
}
.step-card p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  line-height: 1.75;
}

/* 安全提示 */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.tip-card {
  display: flex;
  gap: 18px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s ease;
}
.tip-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.tip-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.tip-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}
.tip-card p {
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.75;
}

/* FAQ */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.faq-item:hover {
  border-color: rgba(99, 102, 241, 0.3);
}
.faq-item.open {
  border-color: rgba(99, 102, 241, 0.45);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: color 0.3s ease;
}
.faq-question:hover { color: var(--color-primary); }
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  flex-shrink: 0;
  transition: transform 0.35s ease, background 0.3s ease;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--color-primary);
  color: #fff;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-answer p {
  padding: 0 28px 24px;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.85;
}

/* CTA */
.cta-section {
  position: relative;
  padding: 80px 0;
  background-size: cover;
  background-position: center;
  border-radius: 28px;
  overflow: hidden;
}
.cta-overlay {
  background: linear-gradient(120deg, rgba(63, 61, 86, 0.95), rgba(49, 46, 129, 0.9) 60%, rgba(79, 70, 229, 0.85));
  padding: 70px 60px;
  text-align: center;
  border-radius: 28px;
}
.cta-overlay h2 {
  color: #fff;
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 14px;
}
.cta-overlay p {
  color: rgba(255, 255, 255, 0.82);
  font-size: 16px;
  margin-bottom: 34px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* 页脚 */
.site-footer {
  background: #0f172a;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 90px;
}
.footer-inner {
  padding: 64px 24px 48px;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 60px;
}
.footer-brand .logo-text {
  color: #fff;
  font-size: 20px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 18px;
  max-width: 420px;
}
.footer-links h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
}
.footer-links a {
  display: block;
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  padding: 6px 0;
  transition: all 0.3s ease;
}
.footer-links a:hover {
  color: #fbbf24;
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px;
  text-align: center;
  color: rgba(255, 255, 255, 0.45);
  font-size: 13px;
}

/* 移动端底部 Tab */
.mobile-tabbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 60;
  display: none;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--color-border);
  padding-bottom: env(safe-area-inset-bottom);
  box-shadow: 0 -6px 24px rgba(15, 23, 42, 0.06);
}
.tab-bar-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}
.tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 0 8px;
  font-size: 11px;
  color: var(--color-muted);
  transition: color 0.3s ease;
}
.tab-item i { font-size: 18px; }
.tab-item.active {
  color: var(--color-primary);
  font-weight: 600;
}
@media (max-width: 767px) {
  .desktop-nav { display: none; }
  .header-cta { display: none; }
  .header-inner { justify-content: space-between; }
  .site-header { padding-bottom: 4px; }
  .mobile-tabbar { display: block; }
  body { padding-bottom: 64px; }
}

/* 响应式 */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .cat-hero { padding: 80px 0 90px; }
  .cat-hero-content h1 { font-size: 36px; }
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; padding: 48px 24px 40px; }
}
@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .cat-hero { padding: 56px 0 70px; }
  .cat-hero-content h1 { font-size: 28px; }
  .cat-hero-content p { font-size: 15px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .cards-grid { grid-template-columns: 1fr; gap: 20px; }
  .steps-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .step-card { padding: 24px 20px; }
  .tips-grid { grid-template-columns: 1fr; gap: 16px; }
  .section-head h2 { font-size: 26px; }
  .cta-overlay { padding: 48px 24px; }
  .cta-overlay h2 { font-size: 24px; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
  .faq-question { padding: 18px 20px; font-size: 14px; }
  .faq-answer p { padding: 0 20px 20px; }
  .logo-text { font-size: 16px; }
  .logo-mark { width: 36px; height: 36px; }
}

/* roulang page: category2 */
:root {
        --primary: #5B7CFA;
        --primary-dark: #4059D9;
        --primary-light: #EEF2FF;
        --accent: #A78BFA;
        --accent-light: #F3E8FF;
        --bg: #F7F8FE;
        --surface: #FFFFFF;
        --text: #1E293B;
        --text-muted: #64748B;
        --border: #E6EAF5;
        --radius-lg: 24px;
        --radius-md: 16px;
        --radius-sm: 10px;
        --shadow-sm: 0 2px 10px rgba(30, 41, 59, 0.06);
        --shadow-md: 0 12px 32px rgba(30, 41, 59, 0.09);
        --shadow-lg: 0 20px 50px rgba(91, 124, 250, 0.18);
        --header-h: 72px;
        --transition: 0.25s ease;
    }
    * {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        background: var(--bg);
        color: var(--text);
        line-height: 1.7;
        -webkit-font-smoothing: antialiased;
    }
    img {
        max-width: 100%;
        display: block;
    }
    a {
        color: inherit;
        text-decoration: none;
    }
    button {
        font-family: inherit;
    }
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 24px;
    }
    .section {
        padding: 80px 0;
    }
    .section-head {
        text-align: center;
        max-width: 680px;
        margin: 0 auto 48px;
    }
    .section-tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: var(--primary-light);
        color: var(--primary-dark);
        font-size: 13px;
        font-weight: 600;
        padding: 6px 14px;
        border-radius: 999px;
        margin-bottom: 16px;
    }
    .section-title {
        font-size: 34px;
        font-weight: 800;
        line-height: 1.3;
        letter-spacing: -0.02em;
    }
    .section-desc {
        color: var(--text-muted);
        font-size: 16px;
        margin-top: 12px;
    }

    .site-header {
        position: sticky;
        top: 0;
        z-index: 50;
        background: rgba(255, 255, 255, 0.82);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border-bottom: 1px solid rgba(230, 234, 245, 0.7);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: var(--header-h);
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .logo-mark {
        width: 40px;
        height: 40px;
        border-radius: 14px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        color: #fff;
        font-size: 20px;
        font-weight: 800;
        box-shadow: 0 8px 20px rgba(91, 124, 250, 0.28);
    }
    .logo-text {
        font-size: 20px;
        font-weight: 800;
        letter-spacing: -0.02em;
    }
    .desktop-nav {
        display: flex;
        gap: 8px;
    }
    .nav-link {
        color: var(--text-muted);
        font-weight: 500;
        font-size: 15px;
        padding: 10px 16px;
        border-radius: 12px;
        transition: all var(--transition);
    }
    .nav-link:hover {
        color: var(--primary);
        background: var(--primary-light);
    }
    .nav-link.active {
        color: var(--primary-dark);
        background: var(--primary-light);
        font-weight: 600;
    }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 11px 22px;
        border-radius: 14px;
        font-size: 15px;
        font-weight: 600;
        border: none;
        cursor: pointer;
        text-decoration: none;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-primary {
        background: linear-gradient(135deg, var(--primary), var(--accent));
        color: #fff;
        box-shadow: 0 8px 24px rgba(91, 124, 250, 0.28);
    }
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 14px 32px rgba(91, 124, 250, 0.36);
    }
    .btn-primary:active {
        transform: translateY(0);
        box-shadow: 0 6px 16px rgba(91, 124, 250, 0.22);
    }
    .btn:focus-visible,
    .nav-link:focus-visible,
    a:focus-visible {
        outline: 3px solid rgba(91, 124, 250, 0.4);
        outline-offset: 2px;
        border-radius: 8px;
    }
    .header-cta {
        font-size: 14px;
        padding: 9px 18px;
    }

    .page-hero {
        position: relative;
        padding: 100px 0 88px;
        background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        overflow: hidden;
    }
    .page-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(130deg, rgba(64, 89, 217, 0.88) 0%, rgba(91, 124, 250, 0.78) 45%, rgba(167, 139, 250, 0.62) 100%);
    }
    .page-hero::after {
        content: '';
        position: absolute;
        width: 320px;
        height: 320px;
        background: radial-gradient(circle, rgba(255, 255, 255, 0.18), transparent 70%);
        top: -90px;
        right: -60px;
        border-radius: 50%;
        pointer-events: none;
    }
    .page-hero .container {
        position: relative;
        z-index: 1;
        text-align: center;
    }
    .hero-tag {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(255, 255, 255, 0.18);
        border: 1px solid rgba(255, 255, 255, 0.35);
        color: #fff;
        padding: 8px 18px;
        border-radius: 999px;
        font-size: 14px;
        font-weight: 600;
        backdrop-filter: blur(8px);
        margin-bottom: 20px;
    }
    .hero-title {
        font-size: 44px;
        font-weight: 800;
        color: #fff;
        line-height: 1.25;
        letter-spacing: -0.02em;
    }
    .hero-desc {
        color: rgba(255, 255, 255, 0.88);
        max-width: 640px;
        margin: 16px auto 32px;
        font-size: 17px;
    }
    .hero-actions {
        display: flex;
        gap: 14px;
        justify-content: center;
        flex-wrap: wrap;
    }
    .btn-white {
        background: #fff;
        color: var(--primary-dark);
        box-shadow: 0 10px 28px rgba(0, 0, 0, 0.12);
    }
    .btn-white:hover {
        transform: translateY(-2px);
        box-shadow: 0 16px 36px rgba(0, 0, 0, 0.16);
    }
    .btn-ghost-white {
        background: rgba(255, 255, 255, 0.15);
        color: #fff;
        border: 1.5px solid rgba(255, 255, 255, 0.4);
        backdrop-filter: blur(8px);
    }
    .btn-ghost-white:hover {
        background: rgba(255, 255, 255, 0.22);
        transform: translateY(-2px);
    }

    .card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-sm);
        padding: 24px;
        transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-4px);
    }
    .card-icon {
        width: 54px;
        height: 54px;
        border-radius: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        color: #fff;
        margin-bottom: 18px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        box-shadow: 0 8px 20px rgba(91, 124, 250, 0.24);
    }
    .card-title {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 8px;
    }
    .card-text {
        color: var(--text-muted);
        font-size: 14.5px;
        line-height: 1.7;
    }

    .news-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .news-card {
        display: flex;
        flex-direction: column;
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: all 0.35s ease;
    }
    .news-card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-5px);
    }
    .news-cover {
        width: 100%;
        height: 190px;
        object-fit: cover;
    }
    .news-body {
        padding: 20px 22px 24px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .news-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 10px;
    }
    .tag-badge {
        background: var(--primary-light);
        color: var(--primary-dark);
        font-size: 12.5px;
        font-weight: 600;
        padding: 4px 12px;
        border-radius: 999px;
    }
    .news-date {
        color: var(--text-muted);
        font-size: 13px;
    }
    .news-title {
        font-size: 17px;
        font-weight: 700;
        line-height: 1.5;
        margin-bottom: 8px;
    }
    .news-excerpt {
        color: var(--text-muted);
        font-size: 14px;
        line-height: 1.7;
    }

    .topic-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .topic-card {
        position: relative;
        border-radius: var(--radius-lg);
        overflow: hidden;
        min-height: 320px;
        display: flex;
        align-items: flex-end;
        box-shadow: var(--shadow-md);
        transition: all 0.35s ease;
    }
    .topic-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }
    .topic-card img {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .topic-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(to top, rgba(15, 23, 42, 0.88) 0%, rgba(15, 23, 42, 0.35) 60%, rgba(15, 23, 42, 0.05) 100%);
    }
    .topic-content {
        position: relative;
        padding: 28px;
        width: 100%;
    }
    .topic-content h3 {
        color: #fff;
        font-size: 20px;
        font-weight: 700;
        margin-bottom: 6px;
    }
    .topic-content p {
        color: rgba(255, 255, 255, 0.82);
        font-size: 14px;
        line-height: 1.7;
        margin-bottom: 12px;
    }
    .topic-meta {
        color: rgba(255, 255, 255, 0.75);
        font-size: 13.5px;
    }

    .process-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }
    .process-step {
        text-align: center;
        padding: 32px 20px;
        position: relative;
    }
    .step-num {
        width: 48px;
        height: 48px;
        margin: 0 auto 18px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 800;
        font-size: 18px;
        box-shadow: 0 8px 22px rgba(91, 124, 250, 0.25);
    }
    .step-title {
        font-size: 17px;
        font-weight: 700;
        margin-bottom: 6px;
    }
    .step-text {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.7;
    }

    .faq-wrap {
        max-width: 760px;
        margin: 0 auto;
    }
    .faq-item {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        margin-bottom: 14px;
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: all 0.3s ease;
    }
    .faq-item:hover {
        box-shadow: var(--shadow-md);
        border-color: var(--primary-light);
    }
    .faq-item summary {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 18px 24px;
        cursor: pointer;
        font-weight: 600;
        font-size: 15.5px;
        list-style: none;
    }
    .faq-item summary::-webkit-details-marker {
        display: none;
    }
    .faq-item summary::after {
        content: '\f078';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        color: var(--text-muted);
        font-size: 14px;
        transition: transform 0.3s ease;
    }
    .faq-item[open] summary::after {
        transform: rotate(180deg);
    }
    .faq-item[open] {
        border-color: var(--primary-light);
    }
    .faq-body {
        padding: 0 24px 20px;
        color: var(--text-muted);
        font-size: 14.5px;
        line-height: 1.8;
    }

    .cta-box {
        position: relative;
        overflow: hidden;
        background: linear-gradient(135deg, var(--primary-dark), var(--primary) 55%, var(--accent));
        border-radius: 28px;
        padding: 64px 40px;
        text-align: center;
        box-shadow: 0 24px 60px rgba(64, 89, 217, 0.28);
    }
    .cta-box h2 {
        color: #fff;
        font-size: 30px;
        font-weight: 800;
        margin-bottom: 12px;
    }
    .cta-box p {
        color: rgba(255, 255, 255, 0.88);
        max-width: 520px;
        margin: 0 auto 28px;
        font-size: 16px;
    }
    .cta-actions {
        display: flex;
        gap: 12px;
        justify-content: center;
        flex-wrap: wrap;
    }

    .site-footer {
        background: #0E1420;
        color: #94A3B8;
        padding: 56px 0 28px;
        margin-top: 80px;
    }
    .footer-inner {
        display: grid;
        grid-template-columns: 1.5fr 1fr;
        gap: 40px;
        margin-bottom: 36px;
    }
    .footer-brand .logo-text {
        color: #fff;
        font-size: 22px;
        font-weight: 800;
    }
    .footer-brand p {
        margin-top: 14px;
        font-size: 14.5px;
        line-height: 1.8;
        max-width: 380px;
    }
    .footer-links h4 {
        color: #fff;
        font-size: 16px;
        margin-bottom: 14px;
    }
    .footer-links a {
        display: block;
        color: #94A3B8;
        font-size: 14.5px;
        margin-bottom: 10px;
        transition: color 0.2s;
    }
    .footer-links a:hover {
        color: var(--primary-light);
    }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-top: 22px;
        text-align: center;
        font-size: 13.5px;
        color: #64748B;
    }

    .mobile-bottom-tab {
        display: none;
    }

    @media (max-width: 1024px) {
        .news-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .topic-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .process-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }

    @media (max-width: 820px) {
        .desktop-nav,
        .header-cta {
            display: none;
        }
        .mobile-bottom-tab {
            display: flex;
            justify-content: space-around;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-top: 1px solid var(--border);
            padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
        }
        .mobile-bottom-tab a {
            display: flex;
            flex-direction: column;
            align-items: center;
            color: var(--text-muted);
            font-size: 11.5px;
            font-weight: 500;
            padding: 8px 10px;
            border-radius: 12px;
            transition: all 0.2s;
        }
        .mobile-bottom-tab a i {
            font-size: 19px;
            margin-bottom: 3px;
        }
        .mobile-bottom-tab a.active {
            color: var(--primary);
            background: var(--primary-light);
        }
        body {
            padding-bottom: 64px;
        }
        .section {
            padding: 56px 0;
        }
        .section-title {
            font-size: 28px;
        }
        .page-hero {
            padding: 64px 0;
        }
        .hero-title {
            font-size: 32px;
        }
    }

    @media (max-width: 520px) {
        .container {
            padding: 0 18px;
        }
        .header-inner {
            height: 62px;
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            font-size: 17px;
            border-radius: 11px;
        }
        .logo-text {
            font-size: 18px;
        }
        .news-grid {
            grid-template-columns: 1fr;
        }
        .topic-grid {
            grid-template-columns: 1fr;
        }
        .process-grid {
            grid-template-columns: 1fr;
        }
        .footer-inner {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .cta-box {
            padding: 44px 24px;
        }
        .cta-box h2 {
            font-size: 24px;
        }
        .hero-actions {
            flex-direction: column;
            align-items: stretch;
        }
        .hero-actions .btn {
            width: 100%;
        }
        .cta-actions .btn {
            width: auto;
        }
    }