/* roulang page: index */
:root {
  --bg-primary: #0B111F;
  --bg-secondary: #070B14;
  --surface: rgba(255,255,255,0.05);
  --surface-hover: rgba(255,255,255,0.08);
  --input-bg: rgba(255,255,255,0.08);
  --accent: #2BD1FF;
  --accent-secondary: #7C6CFF;
  --alert: #FFB84D;
  --text-primary: #EAF2FF;
  --text-secondary: #8A9BB8;
  --text-muted: #5E6E8C;
  --line: rgba(255,255,255,0.08);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-input: 10px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
  --shadow-card-hover: 0 16px 48px rgba(0,0,0,0.45), 0 0 0 1px rgba(43,209,255,0.2);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: color 0.25s, opacity 0.25s; }
a:hover { color: #7DE4FF; }
button, input { font-family: inherit; }
h1, h2, h3 { letter-spacing: -0.02em; line-height: 1.3; }
.container-x { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section-pad { padding: 96px 0; }
.bg-grid {
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 56px 56px;
}
.glow-accent { position: absolute; width: 560px; height: 560px; border-radius: 50%; background: radial-gradient(circle, rgba(43,209,255,0.15), transparent 70%); pointer-events: none; }
.glow-violet { position: absolute; width: 480px; height: 480px; border-radius: 50%; background: radial-gradient(circle, rgba(124,108,255,0.12), transparent 70%); pointer-events: none; }
.glass {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: transform 0.3s, box-shadow 0.3s, background 0.3s, border-color 0.3s;
  position: relative;
}
.glass::before {
  content: '';
  position: absolute;
  top: 0; left: 12px; right: 12px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  border-radius: 50%;
}
.glass:hover {
  background: rgba(255,255,255,0.08);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
  border-color: rgba(43,209,255,0.2);
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #2BD1FF, #4A8CFF);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  padding: 14px 34px;
  border-radius: var(--radius-btn);
  border: none;
  cursor: pointer;
  box-shadow: 0 0 24px rgba(43,209,255,0.4), 0 8px 24px rgba(0,0,0,0.3);
  transition: all 0.3s;
  text-align: center;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(43,209,255,0.6), 0 12px 32px rgba(0,0,0,0.4);
  color: #fff;
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 12px rgba(43,209,255,0.3), 0 4px 12px rgba(0,0,0,0.3);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 500;
  padding: 14px 34px;
  border-radius: var(--radius-btn);
  border: 1px solid rgba(255,255,255,0.3);
  cursor: pointer;
  transition: all 0.3s;
  text-align: center;
}
.btn-ghost:hover {
  border-color: rgba(43,209,255,0.7);
  background: rgba(43,209,255,0.08);
  color: var(--accent);
}
.btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 8px; }
.btn-lg { padding: 16px 44px; font-size: 17px; }
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 70px;
  background: rgba(11,17,31,0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  z-index: 1000;
}
.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #2BD1FF, #7C6CFF);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(43,209,255,0.35);
}
.nav-brand-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  letter-spacing: -0.01em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  margin: 0 auto;
}
.nav-link {
  position: relative;
  font-size: 15px;
  color: var(--text-secondary);
  padding: 8px 0;
  transition: color 0.25s;
  white-space: nowrap;
}
.nav-link:hover { color: var(--accent); }
.nav-link.active { color: var(--text-primary); font-weight: 600; }
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
}
.nav-right { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.nav-search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--input-bg);
  border: 1px solid transparent;
  border-radius: var(--radius-input);
  padding: 8px 14px;
  width: 180px;
  transition: all 0.3s;
}
.nav-search:focus-within {
  border-color: rgba(43,209,255,0.6);
  box-shadow: 0 0 0 4px rgba(43,209,255,0.12);
}
.nav-search i { color: var(--text-muted); font-size: 14px; }
.nav-search input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 14px;
  width: 100%;
}
.nav-search input::placeholder { color: var(--text-muted); }
.nav-login {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  color: var(--text-secondary);
  padding: 8px 18px;
  border-radius: var(--radius-btn);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s;
  white-space: nowrap;
}
.nav-login:hover { border-color: var(--accent); color: var(--accent); }
.hamburger { display: none; background: none; border: none; color: var(--text-primary); font-size: 22px; cursor: pointer; }
.mobile-drawer {
  position: fixed;
  top: 70px; left: 0; right: 0;
  background: rgba(11,17,31,0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
  padding: 20px 24px 28px;
  display: none;
  z-index: 999;
}
.mobile-drawer.open { display: block; }
.mobile-drawer a {
  display: block;
  padding: 14px 0;
  color: var(--text-secondary);
  font-size: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.mobile-drawer a:last-child { border-bottom: none; }
.mobile-drawer a.active { color: var(--accent); }
.mobile-drawer .nav-search { width: 100%; margin: 12px 0; }
.hero {
  min-height: 90vh;
  padding: 150px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero-bg-img {
  position: absolute; inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.2;
}
.hero .bg-grid { position: absolute; inset: 0; }
.hero .glow-accent { top: -80px; right: -120px; }
.hero .glow-violet { bottom: -100px; left: -80px; }
.hero-content { position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(43,209,255,0.1);
  border: 1px solid rgba(43,209,255,0.25);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}
.hero h1 {
  font-size: 56px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 20px 0 16px;
  max-width: 680px;
}
.hero-subtitle {
  font-size: 20px;
  color: rgba(234,242,255,0.75);
  line-height: 1.7;
  max-width: 520px;
  margin-bottom: 32px;
}
.hero-ctas { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.hero-media {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,0.5);
}
.hero-media img { width: 100%; height: 100%; object-fit: cover; min-height: 320px; }
.hero-media::after {
  content: '';
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.08);
}
.hero-float-card {
  position: absolute;
  bottom: 20px; left: 20px; right: 20px;
  z-index: 2;
  padding: 16px 20px;
}
.hero-float-card .fc-title { font-size: 15px; font-weight: 600; }
.hero-float-card .fc-sub { font-size: 13px; color: var(--text-secondary); margin-top: 2px; }
.trust-bar {
  border-top: 1px solid var(--line);
  margin-top: 56px;
  padding-top: 28px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.trust-item { text-align: center; }
.trust-item .t-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.trust-item .t-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}
.section-head { margin-bottom: 48px; }
.section-head h2 { font-size: 34px; font-weight: 700; color: var(--text-primary); }
.section-head .section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 72ch;
  margin-top: 12px;
}
.feature-row { display: flex; align-items: center; gap: 48px; margin-bottom: 80px; }
.feature-row .fr-media { flex: 0 0 40%; }
.feature-row .fr-text { flex: 1; max-width: 560px; }
.fr-icon {
  width: 48px; height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(43,209,255,0.15), rgba(124,108,255,0.15));
  border: 1px solid rgba(43,209,255,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 20px;
  margin-bottom: 16px;
}
.feature-row h3 { font-size: 22px; font-weight: 700; margin-bottom: 12px; }
.feature-row p { font-size: 16px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; }
.feature-link { font-size: 14px; font-weight: 600; color: var(--accent); }
.feature-link i { font-size: 12px; margin-left: 4px; }
.feature-link:hover { color: #7DE4FF; }
.wide-banner {
  height: 220px;
  border-radius: 18px;
  position: relative;
  overflow: hidden;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 96px;
}
.wide-banner::after {
  content: '';
  position: absolute; inset: 0;
  background: rgba(11,17,31,0.55);
}
.wide-banner .banner-content { position: relative; z-index: 2; text-align: center; padding: 0 24px; }
.wide-banner h3 { font-size: 26px; font-weight: 700; }
.wide-banner p { font-size: 15px; color: rgba(234,242,255,0.8); margin-top: 8px; }
.demo-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 48px; align-items: center; }
.demo-panel { border-radius: 18px; overflow: hidden; position: relative; }
.demo-panel img { width: 100%; height: 100%; object-fit: cover; }
.play-btn {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 64px; height: 64px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  backdrop-filter: blur(10px);
  z-index: 2;
  transition: all 0.3s;
}
.play-btn:hover { background: rgba(43,209,255,0.3); border-color: var(--accent); transform: translate(-50%, -50%) scale(1.05); }
.demo-points { list-style: none; padding: 0; margin: 24px 0 32px; }
.demo-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 0;
  font-size: 16px;
  color: var(--text-secondary);
}
.demo-points li i { color: var(--accent); margin-top: 5px; font-size: 14px; }
.data-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 48px; }
.data-card { padding: 28px 32px; }
.data-card .dc-num { font-size: 32px; font-weight: 800; color: var(--accent); font-variant-numeric: tabular-nums; }
.data-card .dc-title { font-size: 16px; font-weight: 600; margin: 8px 0; }
.data-card .dc-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.testi-card { padding: 32px; }
.testi-card .t-quote { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; }
.testi-card .t-meta { display: flex; gap: 12px; align-items: center; }
.testi-card .t-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.testi-card .t-name { font-size: 15px; font-weight: 600; }
.testi-card .t-role { font-size: 13px; color: var(--text-muted); }
.partner-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 24px 48px; margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--line); }
.partner-text { font-size: 14px; color: var(--text-muted); }
.news-list { list-style: none; padding: 0; }
.news-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 24px 16px;
  border-bottom: 1px solid var(--line);
  transition: background 0.25s;
}
.news-item:hover { background: rgba(255,255,255,0.04); }
.news-item:first-child { border-top: 1px solid var(--line); }
.news-thumb {
  width: 240px; height: 150px;
  border-radius: 12px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 28px;
}
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-body { flex: 1; min-width: 0; }
.news-body h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; transition: color 0.25s; }
.news-body h3 a { color: var(--text-primary); }
.news-body h3 a:hover { color: var(--accent); }
.news-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 10px;
}
.news-meta { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-muted); flex-wrap: wrap; }
.news-tag {
  padding: 2px 10px;
  border-radius: 999px;
  background: rgba(43,209,255,0.1);
  border: 1px solid rgba(43,209,255,0.2);
  color: var(--accent);
  font-size: 12px;
}
.news-read { font-size: 13px; color: var(--accent); font-weight: 500; margin-left: auto; }
.faq-wrap { display: grid; grid-template-columns: 4fr 8fr; gap: 48px; }
.faq-item { margin-bottom: 12px; }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 20px;
  height: 60px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.3s;
  text-align: left;
}
.faq-q:hover { background: rgba(255,255,255,0.05); border-color: rgba(43,209,255,0.2); }
.faq-item.open .faq-q { color: var(--accent); background: rgba(255,255,255,0.05); border-color: rgba(43,209,255,0.3); }
.faq-icon {
  width: 24px; height: 24px;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  transition: transform 0.3s, background 0.3s, color 0.3s;
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--accent); color: #fff; border-color: var(--accent); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  padding: 0 20px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}
.faq-item.open .faq-a { max-height: 300px; padding: 16px 20px 20px; }
.cta-section {
  position: relative;
  background: var(--bg-secondary);
  padding: 80px 0;
  overflow: hidden;
}
.cta-section .bg-grid { position: absolute; inset: 0; }
.cta-section .glow-accent { top: 50%; left: 50%; transform: translate(-120%, -50%); }
.cta-section .glow-violet { top: 50%; left: 50%; transform: translate(20%, -50%); }
.cta-inner { position: relative; z-index: 2; text-align: center; }
.cta-inner h2 { font-size: 36px; font-weight: 800; }
.cta-inner p { font-size: 17px; color: rgba(234,242,255,0.7); margin: 16px auto 32px; max-width: 480px; }
.site-footer { background: var(--bg-secondary); padding-top: 64px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 48px; padding-bottom: 48px; }
.footer-brand .f-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--text-muted); line-height: 1.8; max-width: 300px; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: var(--text-primary); margin-bottom: 16px; }
.footer-col a { display: block; font-size: 14px; color: var(--text-secondary); padding: 6px 0; }
.footer-col a:hover { color: var(--accent); }
.footer-col .contact-line { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-secondary); padding: 6px 0; }
.footer-col .contact-line i { color: var(--accent); width: 16px; }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 20px 0;
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}
.mobile-cta-bar {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 64px;
  background: rgba(11,17,31,0.92);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
  z-index: 998;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}
.mobile-cta-bar .m-brand { font-size: 16px; font-weight: 700; }
.mobile-cta-bar .btn-primary { padding: 10px 24px; font-size: 14px; }
.empty-state { text-align: center; padding: 48px 24px; color: var(--text-muted); }
.empty-state i { font-size: 32px; margin-bottom: 12px; display: block; }
@media (max-width: 1200px) {
  .nav-search { width: 140px; }
  .nav-links { gap: 16px; }
  .nav-brand-text { font-size: 20px; }
}
@media (max-width: 992px) {
  .hero h1 { font-size: 44px; }
  .feature-row { gap: 32px; }
  .data-cards { grid-template-columns: 1fr; }
  .faq-wrap { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .demo-grid { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 768px) {
  .section-pad { padding: 64px 0; }
  .nav-links, .nav-right .nav-search, .nav-login { display: none; }
  .hamburger { display: block; }
  .hero { padding: 120px 0 60px; }
  .hero h1 { font-size: 34px; }
  .hero-subtitle { font-size: 17px; }
  .trust-bar { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .feature-row { flex-direction: column !important; gap: 24px; margin-bottom: 48px; }
  .feature-row .fr-media { flex: 0 0 auto; width: 100%; }
  .wide-banner { height: 180px; margin-bottom: 64px; }
  .news-item { flex-direction: column; align-items: flex-start; }
  .news-thumb { width: 100%; height: auto; aspect-ratio: 16/9; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .mobile-cta-bar { display: flex; }
  body { padding-bottom: 64px; }
  .section-head h2 { font-size: 28px; }
  .cta-inner h2 { font-size: 28px; }
  .news-read { margin-left: 0; }
}
@media (max-width: 576px) {
  .container-x { padding: 0 16px; }
  .hero h1 { font-size: 30px; }
  .hero-ctas .btn-primary, .hero-ctas .btn-ghost { width: 100%; justify-content: center; }
  .data-card { padding: 20px; }
  .testi-card { padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* roulang page: article */
:root {
  --bg-primary: #0B111F;
  --bg-surface: rgba(255,255,255,0.05);
  --bg-surface-hover: rgba(255,255,255,0.08);
  --bg-input: rgba(255,255,255,0.08);
  --accent: #2BD1FF;
  --accent-secondary: #7C6CFF;
  --tag-warn: #FFB84D;
  --text-primary: #EAF2FF;
  --text-secondary: #8A9BB8;
  --text-muted: #5E6E8C;
  --border-light: rgba(255,255,255,0.08);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-lg: 18px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
  --shadow-card-hover: 0 16px 48px rgba(0,0,0,0.45);
  --gradient: linear-gradient(135deg, #2BD1FF, #4A8CFF);
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color .25s ease; }
a:hover { color: #5adcff; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button, input { font-family: inherit; }

.container-x { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

.grid-bg {
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 70px;
  background: rgba(11,17,31,0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.header-inner {
  max-width: 1280px; margin: 0 auto; padding: 0 24px;
  height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-icon {
  width: 38px; height: 38px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--gradient); color: #fff;
  box-shadow: 0 0 20px rgba(43,209,255,0.35);
  flex-shrink: 0;
}
.brand-text {
  font-size: 22px; font-weight: 700; color: var(--text-primary);
  letter-spacing: -0.02em; white-space: nowrap;
}
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-link {
  font-size: 15px; color: var(--text-secondary); font-weight: 500;
  padding: 6px 2px; position: relative; transition: color .25s ease;
  white-space: nowrap;
}
.nav-link:hover { color: var(--accent); }
.nav-link.active { color: var(--accent); }
.nav-link.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -4px;
  height: 4px; border-radius: 999px; background: var(--gradient);
}
.header-right { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }
.header-search { width: 220px; position: relative; }
.header-search input {
  width: 100%; height: 40px; padding: 0 14px 0 38px;
  background: var(--bg-input); border: 1px solid var(--border-light);
  border-radius: 10px; color: var(--text-primary); font-size: 14px;
  outline: none; transition: border-color .25s, box-shadow .25s;
}
.header-search input::placeholder { color: var(--text-muted); }
.header-search input:focus {
  border-color: rgba(43,209,255,0.6);
  box-shadow: 0 0 0 3px rgba(43,209,255,0.15), 0 0 16px rgba(43,209,255,0.2);
}
.header-search i {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--text-muted); font-size: 14px; pointer-events: none;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 16px; font-weight: 600; padding: 14px 34px;
  border-radius: 10px; cursor: pointer; transition: all .25s ease; border: none;
}
.btn-primary {
  background: var(--gradient); color: #fff;
  box-shadow: 0 0 24px rgba(43,209,255,0.4), 0 8px 24px rgba(0,0,0,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(43,209,255,0.6), 0 12px 32px rgba(0,0,0,0.35);
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 0 12px rgba(43,209,255,0.2), 0 4px 12px rgba(0,0,0,0.2); }
.btn-ghost {
  background: transparent; color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.3);
  padding: 8px 20px; font-size: 14px; border-radius: 8px;
}
.btn-ghost:hover { border-color: rgba(43,209,255,0.7); background: rgba(43,209,255,0.08); color: var(--accent); }
.btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 8px; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; }

.mobile-drawer {
  position: fixed; top: 70px; right: -320px; width: 300px; bottom: 0; z-index: 99;
  background: rgba(11,17,31,0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-left: 1px solid var(--border-light);
  padding: 32px 28px;
  transition: right .35s ease;
  display: flex; flex-direction: column; gap: 18px;
  overflow-y: auto;
}
.mobile-drawer.open { right: 0; }
.mobile-drawer a { font-size: 16px; color: var(--text-secondary); }
.mobile-drawer a:hover, .mobile-drawer a.active { color: var(--accent); }
.mobile-drawer .header-search { width: 100%; }

.breadcrumb-bar { padding: 110px 0 32px; border-bottom: 1px solid var(--border-light); }
.breadcrumb { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-muted); flex-wrap: wrap; }
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--text-muted); opacity: 0.5; }

.article-head { padding: 48px 0 0; max-width: 860px; margin: 0 auto; }
.article-head h1 {
  font-size: 40px; font-weight: 800; line-height: 1.3;
  letter-spacing: -0.02em; color: var(--text-primary);
  margin-bottom: 20px;
}
.article-meta { display: flex; align-items: center; gap: 20px; font-size: 14px; color: var(--text-secondary); flex-wrap: wrap; }
.article-meta .cat-tag {
  display: inline-flex; align-items: center; padding: 4px 14px;
  background: rgba(43,209,255,0.12); color: var(--accent);
  border-radius: 999px; font-size: 13px; font-weight: 500;
}
.article-meta .sep-dot { width: 4px; height: 4px; background: var(--text-muted); border-radius: 50%; flex-shrink: 0; }

.article-main { padding: 48px 0 0; }
.article-content-wrap { max-width: 760px; margin: 0 auto; }
.article-content {
  font-size: 17px; line-height: 1.9; color: rgba(234,242,255,0.88);
  letter-spacing: 0.01em;
}
.article-content p { margin-bottom: 28px; max-width: 72ch; }
.article-content h2 {
  font-size: 26px; font-weight: 700; color: var(--text-primary);
  margin: 48px 0 24px; padding-top: 12px;
}
.article-content h3 {
  font-size: 20px; font-weight: 600; color: var(--text-primary);
  margin: 32px 0 16px;
}
.article-content img { border-radius: 12px; margin: 32px 0; }
.article-content blockquote {
  border-left: 4px solid var(--accent); background: rgba(43,209,255,0.05);
  padding: 20px 24px; margin: 32px 0; border-radius: 0 12px 12px 0;
  color: var(--text-secondary); font-size: 16px; line-height: 1.8;
}
.article-content ul, .article-content ol { margin: 0 0 28px; padding-left: 24px; }
.article-content ul li { list-style: disc; margin-bottom: 8px; }
.article-content ol li { list-style: decimal; margin-bottom: 8px; }
.article-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.article-content a:hover { color: #5adcff; }
.article-content table { width: 100%; border-collapse: collapse; margin: 32px 0; font-size: 15px; }
.article-content th, .article-content td { padding: 12px 16px; border: 1px solid var(--border-light); text-align: left; }
.article-content th { background: rgba(255,255,255,0.06); font-weight: 600; }
.article-content code { background: rgba(255,255,255,0.08); padding: 2px 8px; border-radius: 6px; font-size: 15px; }
.article-content pre {
  background: rgba(11,17,31,0.6); border: 1px solid var(--border-light);
  border-radius: 12px; padding: 20px 24px; overflow-x: auto; margin: 32px 0;
}

.article-tags {
  max-width: 760px; margin: 48px auto 0; padding-top: 28px;
  border-top: 1px solid var(--border-light);
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.tag-pill {
  display: inline-flex; align-items: center; padding: 5px 16px;
  background: var(--bg-surface); border: 1px solid var(--border-light);
  border-radius: 999px; font-size: 13px; color: var(--text-secondary);
  transition: all .25s ease;
}
.tag-pill:hover { border-color: rgba(43,209,255,0.5); color: var(--accent); }
.back-to-list { margin-left: auto; color: var(--text-secondary); font-size: 14px; display: inline-flex; align-items: center; gap: 8px; }
.back-to-list:hover { color: var(--accent); }

.related-section { padding: 96px 0; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card {
  background: var(--bg-surface); border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px; overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
}
.related-card:hover {
  background: var(--bg-surface-hover);
  box-shadow: var(--shadow-card-hover), 0 0 0 1px rgba(43,209,255,0.2);
  transform: translateY(-4px);
}
.related-card .thumb { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
.related-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.related-card:hover .thumb img { transform: scale(1.05); }
.related-card .thumb::after {
  content: ""; position: absolute; inset: 0; background: rgba(11,17,31,0.2);
}
.related-card .card-body { padding: 20px 20px 24px; }
.related-card .card-body h3 {
  font-size: 18px; font-weight: 600; line-height: 1.5;
  color: var(--text-primary); margin-bottom: 12px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; min-height: 54px;
}
.related-card .card-body .time { font-size: 13px; color: var(--text-muted); }

.site-footer { background: #070B14; padding: 72px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 48px; }
.footer-brand p { margin-top: 16px; color: var(--text-secondary); font-size: 14px; max-width: 36ch; line-height: 1.8; }
.f-logo { display: flex; align-items: center; gap: 10px; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: var(--text-primary); margin-bottom: 20px; }
.footer-col a { display: flex; padding: 6px 0; font-size: 14px; color: var(--text-secondary); transition: color .25s ease; }
.footer-col a:hover { color: var(--accent); }
.contact-line { display: flex; align-items: center; gap: 12px; padding: 6px 0; font-size: 14px; color: var(--text-secondary); }
.contact-line i { width: 18px; text-align: center; color: var(--accent); }
.footer-bottom {
  margin-top: 56px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.06);
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px; font-size: 13px; color: var(--text-muted);
}

.article-empty { text-align: center; padding: 120px 0; }
.article-empty i { font-size: 48px; color: var(--text-muted); margin-bottom: 20px; }
.article-empty p { font-size: 18px; color: var(--text-secondary); margin-bottom: 24px; }

@media (max-width: 1200px) {
  .header-inner { padding: 0 16px; max-width: 1024px; }
  .nav-links { gap: 20px; }
  .header-search { width: 180px; }
}
@media (max-width: 992px) {
  .nav-links, .header-search { display: none; }
  .nav-toggle { display: flex; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}
@media (max-width: 768px) {
  .section-pad { padding: 64px 0; }
  .article-head h1 { font-size: 30px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .article-meta { gap: 12px; }
  .back-to-list { margin-left: 0; width: 100%; margin-top: 8px; }
  .related-section { padding: 64px 0; }
  .breadcrumb-bar { padding: 96px 0 24px; }
}
@media (max-width: 576px) {
  .header-inner { padding: 0 12px; }
  .brand-text { font-size: 18px; }
  .btn { padding: 12px 24px; font-size: 15px; }
  .article-head h1 { font-size: 26px; }
  .article-content { font-size: 16px; }
  .footer-grid { gap: 28px; }
}

/* roulang page: category2 */
:root {
            --bg-primary: #0B111F;
            --bg-card: rgba(255, 255, 255, 0.05);
            --bg-card-hover: rgba(255, 255, 255, 0.08);
            --bg-input: rgba(255, 255, 255, 0.08);
            --accent: #2BD1FF;
            --accent-secondary: #7C6CFF;
            --tag-color: #FFB84D;
            --text-primary: #EAF2FF;
            --text-secondary: #8A9BB8;
            --text-muted: #5E6E8C;
            --border-color: rgba(255, 255, 255, 0.08);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-input: 10px;
            --radius-tag: 999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.45);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.85;
            letter-spacing: 0.01em;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s ease;
        }

        a:hover {
            color: rgba(43, 209, 255, 0.85);
        }

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

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

        button {
            cursor: pointer;
        }

        .container-x {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ============ Header ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 999;
            height: 70px;
            background: rgba(11, 17, 31, 0.75);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .header-inner {
            height: 70px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            background: linear-gradient(135deg, #2BD1FF, #7C6CFF);
            box-shadow: 0 0 18px rgba(43, 209, 255, 0.3);
        }

        .site-logo-text {
            font-size: 22px;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            position: relative;
            font-size: 15px;
            color: var(--text-secondary);
            font-weight: 500;
            transition: color 0.25s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--accent);
        }

        .nav-link.active {
            color: var(--accent);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -20px;
            width: 100%;
            height: 4px;
            border-radius: 4px;
            background: var(--accent);
            box-shadow: 0 0 12px rgba(43, 209, 255, 0.5);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-input);
            border-radius: var(--radius-input);
            padding: 0 14px;
            height: 40px;
            width: 220px;
            border: 1px solid transparent;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }

        .search-box i {
            color: var(--text-muted);
            font-size: 14px;
        }

        .search-box input {
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 14px;
            width: 100%;
        }

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        .search-box:focus-within {
            border-color: rgba(43, 209, 255, 0.6);
            box-shadow: 0 0 0 3px rgba(43, 209, 255, 0.15);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 34px;
            background: linear-gradient(135deg, #2BD1FF, #4A8CFF);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            box-shadow: 0 0 24px rgba(43, 209, 255, 0.4), 0 8px 24px rgba(0, 0, 0, 0.3);
            transition: all 0.3s ease;
            line-height: 1;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 40px rgba(43, 209, 255, 0.6), 0 12px 28px rgba(0, 0, 0, 0.3);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(43, 209, 255, 0.3), 0 4px 12px rgba(0, 0, 0, 0.2);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: var(--radius-btn);
            color: var(--text-primary);
            background: transparent;
            font-size: 15px;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .btn-ghost:hover {
            border-color: rgba(43, 209, 255, 0.7);
            background: rgba(43, 209, 255, 0.08);
            color: var(--accent);
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            padding: 8px;
            border-radius: 8px;
        }

        .menu-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
        }

        /* Mobile drawer */
        .mobile-drawer {
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            z-index: 998;
            background: rgba(11, 17, 31, 0.97);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px;
            display: none;
            max-height: calc(100vh - 70px);
            overflow-y: auto;
        }

        .mobile-drawer.open {
            display: block;
        }

        .mobile-drawer .drawer-links {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-drawer .drawer-link {
            padding: 14px 16px;
            border-radius: 12px;
            font-size: 16px;
            color: var(--text-primary);
        }

        .mobile-drawer .drawer-link:hover {
            background: var(--bg-card);
            color: var(--accent);
        }

        .mobile-drawer .drawer-link.active {
            background: rgba(43, 209, 255, 0.1);
            color: var(--accent);
        }

        .mobile-drawer .drawer-search {
            margin-top: 16px;
            display: flex;
            align-items: center;
            background: var(--bg-input);
            border-radius: var(--radius-input);
            padding: 0 14px;
            height: 42px;
            gap: 8px;
        }

        .mobile-drawer .drawer-search i {
            color: var(--text-muted);
        }

        .mobile-drawer .drawer-search input {
            background: transparent;
            color: var(--text-primary);
            width: 100%;
            font-size: 14px;
        }

        .mobile-drawer .drawer-search input::placeholder {
            color: var(--text-muted);
        }

        /* ============ Hero ============ */
        .page-hero {
            padding: 160px 0 80px;
            position: relative;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(11, 17, 31, 0.82);
        }

        .page-hero .grid-overlay {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
        }

        .page-hero .glow-1 {
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(43, 209, 255, 0.12);
            filter: blur(100px);
            top: 20%;
            left: 5%;
            pointer-events: none;
        }

        .page-hero .glow-2 {
            position: absolute;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: rgba(124, 108, 255, 0.1);
            filter: blur(120px);
            bottom: 10%;
            right: 10%;
            pointer-events: none;
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.25s;
        }

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

        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--accent);
        }

        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            max-width: 700px;
        }

        .page-hero .hero-sub {
            font-size: 18px;
            color: rgba(234, 242, 255, 0.75);
            max-width: 640px;
            line-height: 1.7;
        }

        /* ============ Section ============ */
        .section {
            padding: 96px 0;
            position: relative;
        }

        .section-alt {
            background: rgba(255, 255, 255, 0.02);
        }

        .section-header {
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
        }

        .section-tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(43, 209, 255, 0.1);
            border: 1px solid rgba(43, 209, 255, 0.25);
            color: var(--accent);
            font-size: 13px;
            border-radius: var(--radius-tag);
            margin-bottom: 16px;
            font-weight: 500;
        }

        /* ============ Feature Rows ============ */
        .feature-row {
            display: grid;
            grid-template-columns: 4fr 2fr 6fr;
            gap: 24px;
            align-items: center;
            margin-bottom: 48px;
        }

        .feature-row:nth-child(even) {
            grid-template-columns: 6fr 2fr 4fr;
        }

        .feature-row .feature-img {
            border-radius: 18px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            aspect-ratio: 4/3;
            position: relative;
        }

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

        .feature-row .feature-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(11, 17, 31, 0.08);
        }

        .feature-row .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #2BD1FF, #4A8CFF);
            color: #fff;
            font-size: 20px;
            margin-bottom: 20px;
            box-shadow: 0 0 20px rgba(43, 209, 255, 0.25);
        }

        .feature-row h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 14px;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .feature-row p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
            max-width: 520px;
        }

        .feature-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--accent);
        }

        .feature-link:hover {
            color: rgba(43, 209, 255, 0.8);
        }

        /* ============ Content Category Cards ============ */
        .cat-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .cat-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 32px;
            border: 1px solid var(--border-color);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .cat-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
        }

        .cat-card:hover {
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-card-hover), 0 0 0 1px rgba(43, 209, 255, 0.2);
            transform: translateY(-4px);
        }

        .cat-card .card-icon-wrap {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 18px;
            background: rgba(43, 209, 255, 0.12);
            color: var(--accent);
        }

        .cat-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .cat-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .cat-card .card-meta {
            margin-top: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .tag {
            display: inline-block;
            padding: 4px 10px;
            background: rgba(43, 209, 255, 0.08);
            color: var(--accent);
            font-size: 12px;
            border-radius: var(--radius-tag);
            border: 1px solid rgba(43, 209, 255, 0.15);
        }

        .tag-hot {
            background: rgba(255, 184, 77, 0.1);
            color: var(--tag-color);
            border-color: rgba(255, 184, 77, 0.2);
        }

        .tag-new {
            background: rgba(124, 108, 255, 0.1);
            color: var(--accent-secondary);
            border-color: rgba(124, 108, 255, 0.2);
        }

        /* ============ Data Strip ============ */
        .data-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            padding: 32px;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            margin-top: 48px;
        }

        .data-item {
            text-align: center;
        }

        .data-item .num {
            font-size: 28px;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .data-item .label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* ============ FAQ ============ */
        .faq-wrapper {
            display: grid;
            grid-template-columns: 4fr 8fr;
            gap: 60px;
            align-items: start;
        }

        .faq-left h2 {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .faq-left p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 360px;
            line-height: 1.8;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 4px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            width: 100%;
            background: transparent;
            text-align: left;
            transition: color 0.25s ease;
            line-height: 1.5;
        }

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

        .faq-item.active .faq-question {
            color: var(--accent);
        }

        .faq-icon {
            width: 24px;
            height: 24px;
            min-width: 24px;
            border-radius: 50%;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--text-secondary);
            transition: all 0.3s ease;
        }

        .faq-item.active .faq-icon {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-answer-inner {
            padding: 0 4px 24px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 640px;
        }

        /* ============ CTA ============ */
        .cta-section {
            background: #070B14;
            padding: 96px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(43, 209, 255, 0.1);
            filter: blur(120px);
            top: -100px;
            left: 15%;
        }

        .cta-section::after {
            content: "";
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(124, 108, 255, 0.08);
            filter: blur(100px);
            bottom: -80px;
            right: 10%;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .cta-content h2 {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .cta-content p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 40px;
            line-height: 1.8;
        }

        .cta-btns {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: #070B14;
            padding: 64px 0 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-brand .f-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            max-width: 260px;
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text-primary);
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 12px;
            transition: all 0.25s;
        }

        .footer-col a:hover {
            color: var(--accent);
        }

        .footer-col .contact-line {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-bottom span {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ============ Responsive ============ */
        @media (max-width: 1200px) {
            .container-x {
                padding-left: 20px;
                padding-right: 20px;
            }

            .search-box {
                width: 160px;
            }

            .nav-links {
                gap: 20px;
            }

            .hero h1 {
                font-size: 48px;
            }
        }

        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }

            .search-box {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }

            .feature-row,
            .feature-row:nth-child(even) {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .feature-row .feature-img {
                grid-row: 1;
            }

            .cat-card-grid {
                grid-template-columns: 1fr;
            }

            .faq-wrapper {
                grid-template-columns: 1fr;
                gap: 40px;
            }

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

        @media (max-width: 768px) {
            .section {
                padding: 64px 0;
            }

            .btn-primary {
                padding: 12px 24px;
                font-size: 15px;
            }

            .page-hero {
                padding: 120px 0 60px;
            }

            .page-hero h1 {
                font-size: 34px;
            }

            .page-hero .hero-sub {
                font-size: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 576px) {
            .cta-btns {
                flex-direction: column;
            }

            .cta-btns .btn-primary,
            .cta-btns .btn-ghost {
                width: 100%;
            }

            .data-strip {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
                padding: 24px;
            }

            .data-item .num {
                font-size: 24px;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .feature-row h3 {
                font-size: 20px;
            }
        }

/* roulang page: category1 */
:root {
      --bg-primary: #0B111F;
      --surface: rgba(255,255,255,0.05);
      --surface-hover: rgba(255,255,255,0.08);
      --input-bg: rgba(255,255,255,0.08);
      --brand: #2BD1FF;
      --brand-hover: #63dfff;
      --accent: #FFB84D;
      --violet: #7C6CFF;
      --text-primary: #EAF2FF;
      --text-secondary: #8A9BB8;
      --text-muted: #5E6E8C;
      --border: rgba(255,255,255,0.08);
      --radius-card: 16px;
      --radius-btn: 10px;
      --radius-lg: 18px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
      --shadow-card-hover: 0 16px 48px rgba(0,0,0,0.45), 0 0 0 1px rgba(43,209,255,0.2);
      --font-family: "PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: var(--font-family);
      background: var(--bg-primary);
      color: var(--text-primary);
      font-size: 16px;
      line-height: 1.85;
      letter-spacing: 0.01em;
      -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; display: block; }
    a { color: var(--brand); text-decoration: none; transition: color 0.3s ease; }
    a:hover { color: var(--brand-hover); }
    button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
    input, textarea { font-family: inherit; }
    h1, h2, h3, h4 { margin: 0; letter-spacing: -0.02em; }
    p { margin: 0; }
    ul, ol { margin: 0; padding: 0; list-style: none; }

    .container-x { max-width: 1280px; margin: 0 auto; padding: 0 24px; width: 100%; }
    .section-pad { padding: 96px 0; }
    .section-title { font-size: 32px; font-weight: 700; line-height: 1.3; margin-bottom: 48px; }
    .section-sub { font-size: 16px; color: var(--text-muted); max-width: 640px; line-height: 1.8; margin-top: -36px; margin-bottom: 48px; }

    /* Header */
    .site-header {
      position: fixed;
      top: 0; left: 0; right: 0;
      height: 70px;
      background: rgba(11,17,31,0.75);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(255,255,255,0.06);
      z-index: 100;
    }
    .header-inner { height: 70px; }
    .brand { display: flex; align-items: center; gap: 10px; color: var(--text-primary); }
    .brand:hover { color: var(--text-primary); }
    .brand-icon {
      width: 36px; height: 36px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--brand), var(--violet));
      display: flex; align-items: center; justify-content: center;
      color: #fff;
      flex-shrink: 0;
      box-shadow: 0 0 18px rgba(43,209,255,0.3);
    }
    .brand-name { font-size: 22px; font-weight: 700; white-space: nowrap; }
    .nav-links { gap: 32px; }
    .nav-link {
      font-size: 15px;
      color: var(--text-secondary);
      position: relative;
      padding: 24px 0;
      line-height: 1;
      transition: color 0.3s ease;
    }
    .nav-link:hover { color: var(--brand); }
    .nav-link.active { color: var(--brand); }
    .nav-link.active::after {
      content: "";
      position: absolute; left: 0; right: 0; bottom: 0;
      height: 4px;
      border-radius: 999px;
      background: var(--brand);
    }
    .header-right { gap: 12px; }
    .header-search { position: relative; margin: 0; }
    .header-search input {
      width: 220px; height: 38px;
      border-radius: var(--radius-btn);
      background: var(--input-bg);
      border: 1px solid rgba(255,255,255,0.1);
      color: var(--text-primary);
      padding: 0 14px 0 36px;
      font-size: 14px;
      transition: border-color 0.3s ease, box-shadow 0.3s ease;
    }
    .header-search input::placeholder { color: var(--text-muted); }
    .header-search input:focus {
      outline: none;
      border-color: rgba(43,209,255,0.6);
      box-shadow: 0 0 0 4px rgba(43,209,255,0.12);
    }
    .header-search i {
      position: absolute; left: 13px; top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      font-size: 13px;
      pointer-events: none;
    }
    .menu-toggle {
      display: none;
      width: 40px; height: 40px;
      align-items: center; justify-content: center;
      border-radius: 10px;
      border: 1px solid var(--border);
      color: var(--text-primary);
    }
    .menu-toggle .fa-xmark { display: none; }
    .menu-toggle.active .fa-bars { display: none; }
    .menu-toggle.active .fa-xmark { display: inline-block; }

    .mobile-menu {
      display: none;
      position: fixed; top: 70px; left: 0; right: 0; bottom: 0;
      background: rgba(11,17,31,0.98);
      backdrop-filter: blur(14px);
      padding: 24px;
      z-index: 99;
      flex-direction: column;
      gap: 4px;
      overflow-y: auto;
    }
    .mobile-menu.open { display: flex; }
    .mobile-menu > a {
      padding: 14px 12px;
      font-size: 16px;
      color: var(--text-secondary);
      border-radius: 10px;
      transition: background 0.3s ease, color 0.3s ease;
    }
    .mobile-menu > a:hover,
    .mobile-menu > a.active {
      background: rgba(43,209,255,0.08);
      color: var(--brand);
      text-indent: 2px;
    }
    .mobile-search { position: relative; margin-top: 12px; }
    .mobile-search input {
      width: 100%; height: 42px;
      border-radius: var(--radius-btn);
      background: var(--input-bg);
      border: 1px solid rgba(255,255,255,0.1);
      color: var(--text-primary);
      padding: 0 14px 0 38px;
      font-size: 14px;
    }
    .mobile-search input:focus {
      outline: none;
      border-color: rgba(43,209,255,0.6);
      box-shadow: 0 0 0 4px rgba(43,209,255,0.12);
    }
    .mobile-search i {
      position: absolute; left: 14px; top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      font-size: 14px;
    }
    @media (min-width: 769px) {
      .mobile-menu { display: none !important; }
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      font-weight: 600;
      padding: 14px 34px;
      border-radius: var(--radius-btn);
      transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
      text-decoration: none;
      line-height: 1.4;
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--brand) 0%, #4A8CFF 100%);
      color: #fff !important;
      box-shadow: 0 0 24px rgba(43,209,255,0.4), 0 8px 24px rgba(0,0,0,0.3);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 40px rgba(43,209,255,0.6), 0 12px 28px rgba(0,0,0,0.35);
    }
    .btn-primary:active {
      transform: translateY(0);
      box-shadow: 0 0 12px rgba(43,209,255,0.3), 0 4px 12px rgba(0,0,0,0.25);
    }
    .btn-ghost {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.3);
      color: var(--text-primary);
      padding: 12px 24px;
      font-size: 15px;
    }
    .btn-ghost:hover {
      border-color: rgba(43,209,255,0.7);
      background: rgba(43,209,255,0.08);
      color: var(--brand);
    }
    .btn-ghost:active { background: rgba(43,209,255,0.14); }
    .btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 8px; }

    /* Page Hero */
    .page-hero { position: relative; padding: 150px 0 64px; background-color: var(--bg-primary); overflow: hidden; }
    .page-hero::before {
      content: "";
      position: absolute; inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
      background-size: 60px 60px;
      pointer-events: none;
    }
    .page-hero .glow-left {
      position: absolute; width: 500px; height: 500px; border-radius: 50%;
      left: 12%; top: -180px;
      background: radial-gradient(circle, rgba(43,209,255,0.13), transparent 60%);
      pointer-events: none;
    }
    .page-hero .glow-right {
      position: absolute; width: 500px; height: 500px; border-radius: 50%;
      right: 8%; bottom: -220px;
      background: radial-gradient(circle, rgba(124,108,255,0.12), transparent 60%);
      pointer-events: none;
    }
    .page-hero .container-x { position: relative; z-index: 2; }
    .breadcrumb {
      display: flex; align-items: center; gap: 10px;
      font-size: 14px; color: var(--text-muted);
      margin-bottom: 24px;
    }
    .breadcrumb a { color: var(--text-secondary); }
    .breadcrumb a:hover { color: var(--brand); }
    .breadcrumb i { font-size: 10px; color: var(--text-muted); }
    .page-hero h1 { font-size: 48px; font-weight: 800; line-height: 1.25; letter-spacing: -0.02em; max-width: 720px; }
    .hero-lead { font-size: 18px; line-height: 1.8; color: rgba(234,242,255,0.75); max-width: 620px; margin-top: 18px; }

    /* Content Blocks */
    .media-card {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: transform 0.4s ease, box-shadow 0.4s ease;
    }
    .media-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }
    .media-card img { width: 100%; height: auto; }
    .section-tag {
      display: inline-flex; align-items: center;
      padding: 6px 14px;
      border-radius: 999px;
      background: rgba(43,209,255,0.1);
      border: 1px solid rgba(43,209,255,0.25);
      color: var(--brand);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .content-text p {
      color: var(--text-secondary);
      font-size: 16px;
      line-height: 1.85;
      max-width: 72ch;
      margin-bottom: 16px;
    }
    .content-text p:last-child { margin-bottom: 0; }

    /* Scenarios */
    .scenario-list { border-top: 1px solid var(--border); }
    .scenario-row {
      display: flex;
      align-items: flex-start;
      gap: 20px;
      padding: 28px 0;
      border-bottom: 1px solid var(--border);
      transition: background 0.3s ease;
    }
    .scenario-row:hover { background: rgba(255,255,255,0.02); }
    .scenario-icon {
      width: 48px; height: 48px;
      border-radius: 12px;
      background: rgba(43,209,255,0.1);
      border: 1px solid rgba(43,209,255,0.2);
      color: var(--brand);
      display: flex; align-items: center; justify-content: center;
      font-size: 18px;
      flex-shrink: 0;
    }
    .scenario-body h3 { font-size: 20px; font-weight: 600; margin-bottom: 6px; }
    .scenario-body p {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.8;
      max-width: 58ch;
    }

    /* Steps */
    .steps-track { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 8px; }
    .step-item { padding: 32px 20px 0; border-top: 2px solid rgba(43,209,255,0.2); position: relative; }
    .step-dot {
      width: 40px; height: 40px;
      border-radius: 50%;
      background: rgba(43,209,255,0.1);
      border: 1px solid rgba(43,209,255,0.4);
      color: var(--brand);
      display: flex; align-items: center; justify-content: center;
      font-size: 15px; font-weight: 700;
      margin-bottom: 16px;
      transition: box-shadow 0.3s ease, transform 0.3s ease;
    }
    .step-item:hover .step-dot { box-shadow: 0 0 20px rgba(43,209,255,0.35); transform: scale(1.05); }
    .step-item h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
    .step-item p { font-size: 14px; color: var(--text-secondary); line-height: 1.75; max-width: 32ch; }

    /* FAQ */
    .faq-wrap {
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      background: var(--surface);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      overflow: hidden;
      position: relative;
      box-shadow: var(--shadow-card);
    }
    .faq-wrap::before {
      content: "";
      position: absolute; top: 0; left: 16px; right: 16px;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
      z-index: 1;
    }
    .faq-item { border-bottom: 1px solid var(--border); }
    .faq-item:last-child { border-bottom: none; }
    .faq-q {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      width: 100%;
      text-align: left;
      padding: 20px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-primary);
      line-height: 1.5;
      transition: background 0.3s ease, color 0.3s ease;
    }
    .faq-q:hover { background: rgba(255,255,255,0.04); }
    .faq-item.open .faq-q { color: var(--brand); background: rgba(255,255,255,0.05); }
    .faq-icon {
      width: 24px; height: 24px;
      border: 1px solid rgba(255,255,255,0.3);
      border-radius: 50%;
      display: inline-flex; align-items: center; justify-content: center;
      font-size: 12px;
      color: var(--text-secondary);
      flex-shrink: 0;
      transition: all 0.3s ease;
    }
    .faq-item.open .faq-icon {
      background: var(--brand);
      border-color: var(--brand);
      color: #fff;
      transform: rotate(45deg);
    }
    .faq-a { display: none; padding: 0 20px 20px; font-size: 15px; color: var(--text-secondary); line-height: 1.8; }
    .faq-a p { margin: 0; }
    .faq-item.open .faq-a { display: block; animation: fadeDown 0.25s ease; }
    @keyframes fadeDown {
      from { opacity: 0; transform: translateY(-6px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* CTA */
    .cta-section {
      position: relative;
      background: #070B14;
      border-radius: 24px;
      padding: 72px 32px;
      text-align: center;
      overflow: hidden;
      border: 1px solid rgba(255,255,255,0.06);
    }
    .cta-section::before {
      content: "";
      position: absolute; width: 420px; height: 420px;
      left: 15%; top: -180px;
      background: radial-gradient(circle, rgba(43,209,255,0.16), transparent 60%);
      pointer-events: none;
    }
    .cta-section::after {
      content: "";
      position: absolute; width: 420px; height: 420px;
      right: 12%; bottom: -220px;
      background: radial-gradient(circle, rgba(124,108,255,0.13), transparent 60%);
      pointer-events: none;
    }
    .cta-section h2 { font-size: 36px; font-weight: 800; position: relative; z-index: 2; }
    .cta-section p {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 560px;
      margin: 16px auto 32px;
      position: relative;
      z-index: 2;
    }
    .cta-btns { position: relative; z-index: 2; }

    /* Footer */
    .site-footer { background: #070B14; border-top: 1px solid rgba(255,255,255,0.06); padding: 64px 0 28px; margin-top: 96px; }
    .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid var(--border); }
    .f-logo { display: flex; align-items: center; gap: 10px; }
    .footer-brand p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; margin-top: 14px; max-width: 36ch; }
    .footer-col h4 { font-size: 15px; font-weight: 700; margin-bottom: 16px; color: var(--text-primary); }
    .footer-col a { display: block; font-size: 14px; color: var(--text-secondary); margin-bottom: 10px; transition: color 0.3s ease; }
    .footer-col a:hover { color: var(--brand); }
    .contact-line { font-size: 14px; color: var(--text-secondary); margin-top: 8px; display: flex; align-items: center; gap: 8px; }
    .contact-line i { width: 16px; text-align: center; color: var(--text-muted); }
    .footer-bottom { padding-top: 24px; display: flex; align-items: center; justify-content: space-between; color: var(--text-muted); font-size: 13px; }

    /* Responsive */
    @media (max-width: 1200px) {
      .container-x { max-width: 1024px; }
      .nav-links { gap: 20px; }
      .header-search input { width: 180px; }
    }
    @media (max-width: 992px) {
      .steps-track { grid-template-columns: repeat(2, 1fr); gap: 20px; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .nav-links { gap: 16px; }
      .nav-link { font-size: 14px; }
      .header-right .btn-primary { padding: 8px 14px; font-size: 13px; }
    }
    @media (max-width: 768px) {
      .nav-links, .header-search { display: none; }
      .menu-toggle { display: flex; }
      .section-pad { padding: 64px 0; }
      .page-hero { padding: 120px 0 48px; }
      .page-hero h1 { font-size: 34px; }
      .hero-lead { font-size: 16px; }
      .section-title { font-size: 26px; }
      .section-sub { margin-bottom: 36px; }
      .footer-grid { grid-template-columns: 1fr; gap: 32px; }
      .cta-section { padding: 56px 24px; }
    }
    @media (max-width: 576px) {
      .container-x { padding: 0 16px; }
      .header-right .btn-ghost { display: none; }
      .btn-primary.btn-sm { padding: 8px 16px; }
      .page-hero h1 { font-size: 34px; }
      .steps-track { grid-template-columns: 1fr; }
      .cta-section h2 { font-size: 28px; }
      .cta-btns .btn { width: 100%; }
    }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --bg-primary: #0B111F;
            --surface-glass: rgba(255, 255, 255, 0.05);
            --surface-hover: rgba(255, 255, 255, 0.08);
            --input-bg: rgba(255, 255, 255, 0.08);
            --accent-primary: #2BD1FF;
            --accent-secondary: #7C6CFF;
            --accent-tag: #FFB84D;
            --text-primary: #EAF2FF;
            --text-secondary: #8A9BB8;
            --text-muted: #5E6E8C;
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-input: 10px;
            --radius-tag: 999px;
            --radius-cover: 18px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(43, 209, 255, 0.2);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.85;
            letter-spacing: 0.01em;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--accent-primary);
            text-decoration: none;
            transition: color .25s ease, opacity .25s ease;
        }
        a:hover {
            color: #6adcff;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        input,
        textarea {
            font-family: inherit;
            outline: none;
        }

        /* ===== 容器 ===== */
        .container-x {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 999;
            height: 70px;
            background: rgba(11, 17, 31, 0.75);
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .site-header .inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            gap: 20px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, #2BD1FF, #7C6CFF);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            box-shadow: 0 4px 16px rgba(43, 209, 255, 0.3);
        }
        .brand-text {
            font-size: 22px;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-link {
            font-size: 15px;
            color: rgba(234, 242, 255, 0.72);
            position: relative;
            padding: 6px 2px;
            white-space: nowrap;
            transition: color .25s;
        }
        .nav-link:hover {
            color: var(--accent-primary);
        }
        .nav-link.active {
            color: var(--accent-primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 4px;
            border-radius: 999px;
            background: linear-gradient(90deg, #2BD1FF, #7C6CFF);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--input-bg);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-input);
            padding: 0 14px;
            height: 40px;
            width: 220px;
            transition: border-color .25s, box-shadow .25s;
        }
        .search-box i {
            color: var(--text-secondary);
            font-size: 14px;
            margin-right: 8px;
        }
        .search-box input {
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 14px;
            width: 100%;
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }
        .search-box:focus-within {
            border-color: rgba(43, 209, 255, 0.6);
            box-shadow: 0 0 20px rgba(43, 209, 255, 0.25);
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: var(--text-primary);
            padding: 9px 22px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 500;
            transition: all .3s ease;
            cursor: pointer;
        }
        .btn-ghost:hover {
            border-color: rgba(43, 209, 255, 0.7);
            background: rgba(43, 209, 255, 0.08);
            color: var(--accent-primary);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #2BD1FF, #4A8CFF);
            color: #fff;
            padding: 14px 34px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            box-shadow: 0 0 24px rgba(43, 209, 255, 0.4), 0 8px 24px rgba(0, 0, 0, 0.3);
            transition: all .3s ease;
            cursor: pointer;
            border: none;
            white-space: nowrap;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 40px rgba(43, 209, 255, 0.6), 0 14px 32px rgba(0, 0, 0, 0.35);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(43, 209, 255, 0.3), 0 4px 16px rgba(0, 0, 0, 0.3);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
            border-radius: 8px;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 8px;
            color: var(--text-primary);
            font-size: 18px;
            width: 38px;
            height: 38px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }

        /* 移动端抽屉 */
        .mobile-drawer {
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            background: rgba(11, 17, 31, 0.96);
            -webkit-backdrop-filter: blur(18px);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px;
            display: none;
            z-index: 998;
            flex-direction: column;
            gap: 16px;
        }
        .mobile-drawer.open {
            display: flex;
        }
        .mobile-drawer .nav-link {
            font-size: 16px;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-drawer .search-box {
            width: 100%;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 90vh;
            display: flex;
            align-items: center;
            padding: 140px 0 80px;
            background: var(--bg-primary);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center 30%;
            opacity: 0.4;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 17, 31, 0.92) 0%, rgba(11, 17, 31, 0.7) 50%, rgba(11, 17, 31, 0.4) 100%);
        }
        .hero-grid {
            position: relative;
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
            align-items: center;
        }
        .hero-content {
            grid-column: 1 / span 7;
        }
        .hero-visual {
            grid-column: 9 / span 4;
            position: relative;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(43, 209, 255, 0.12);
            border: 1px solid rgba(43, 209, 255, 0.25);
            color: var(--accent-primary);
            font-size: 14px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-tag);
            margin-bottom: 24px;
        }
        .hero-title {
            font-size: clamp(40px, 5vw, 60px);
            font-weight: 800;
            line-height: 1.18;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }
        .hero-title .gradient-text {
            background: linear-gradient(135deg, #2BD1FF, #7C6CFF);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-subtitle {
            font-size: 18px;
            line-height: 1.75;
            color: rgba(234, 242, 255, 0.75);
            max-width: 480px;
            margin-bottom: 36px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 60px;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 32px;
            flex-wrap: wrap;
        }
        .hero-stat .num {
            font-size: 28px;
            font-weight: 800;
            color: var(--accent-primary);
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .hero-card {
            background: rgba(255, 255, 255, 0.06);
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-cover);
            padding: 20px;
            box-shadow: var(--shadow-card);
        }
        .hero-card img {
            border-radius: 12px;
            width: 100%;
            height: 320px;
            object-fit: cover;
        }
        .hero-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 14px;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .hero-card-badge {
            background: rgba(255, 184, 77, 0.15);
            color: var(--accent-tag);
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-tag);
            font-size: 12px;
        }
        .hero-glow {
            position: absolute;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(43, 209, 255, 0.15) 0%, transparent 70%);
            top: -100px;
            right: -100px;
            pointer-events: none;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 96px 0;
        }
        .section-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-primary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }
        .section-desc {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 72ch;
            line-height: 1.85;
        }

        /* ===== 交替图文 ===== */
        .alt-row {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
            align-items: center;
            margin-bottom: 80px;
        }
        .alt-row:last-child {
            margin-bottom: 0;
        }
        .alt-img {
            grid-column: span 4;
            border-radius: var(--radius-cover);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .alt-img img {
            width: 100%;
            height: 300px;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .alt-img:hover img {
            transform: scale(1.03);
        }
        .alt-text {
            grid-column: span 6;
        }
        .alt-text .offset-right {
            grid-column: 7 / span 6;
        }
        .alt-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(43, 209, 255, 0.2), rgba(124, 108, 255, 0.2));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-primary);
            font-size: 20px;
            margin-bottom: 16px;
        }
        .alt-text h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .alt-text p {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.85;
            margin-bottom: 16px;
        }
        .alt-link {
            font-size: 15px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-primary);
        }
        .alt-link:hover {
            color: #6adcff;
        }
        .alt-link i {
            font-size: 13px;
            transition: transform .25s;
        }
        .alt-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 横幅图带 ===== */
        .banner-strip {
            width: 100%;
            height: 220px;
            border-radius: 18px;
            overflow: hidden;
            position: relative;
            margin: 80px 0;
            box-shadow: var(--shadow-card);
        }
        .banner-strip img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .banner-strip::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 17, 31, 0.7) 0%, transparent 60%);
        }

        /* ===== 流程 ===== */
        .process-list {
            display: flex;
            flex-direction: column;
            gap: 32px;
            max-width: 760px;
        }
        .process-item {
            display: flex;
            gap: 24px;
            position: relative;
            padding-left: 20px;
            border-left: 1px solid rgba(255, 255, 255, 0.12);
        }
        .process-num {
            font-size: 20px;
            font-weight: 800;
            color: var(--accent-primary);
            min-width: 52px;
            height: 52px;
            background: rgba(43, 209, 255, 0.08);
            border: 1px solid rgba(43, 209, 255, 0.2);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .process-body h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .process-body p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.75;
            max-width: 520px;
        }

        /* ===== 数据卡 ===== */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            margin-top: 48px;
        }
        .data-card {
            background: var(--surface-glass);
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-top: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-card);
            transition: box-shadow .35s, transform .35s;
        }
        .data-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .data-card .data-title {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .data-card .data-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ===== 信息列表 ===== */
        .info-list {
            display: flex;
            flex-direction: column;
        }
        .info-row {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 24px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: background .3s;
            border-radius: 12px;
            padding-left: 12px;
            padding-right: 12px;
        }
        .info-row:hover {
            background: rgba(255, 255, 255, 0.04);
        }
        .info-thumb {
            width: 240px;
            height: 150px;
            flex-shrink: 0;
            border-radius: 12px;
            overflow: hidden;
        }
        .info-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .info-content {
            flex: 1;
        }
        .info-content h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-primary);
            transition: color .25s;
        }
        .info-row:hover .info-content h3 {
            color: var(--accent-primary);
        }
        .info-content .summary {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 10px;
        }
        .info-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .info-meta .tag {
            background: rgba(255, 184, 77, 0.12);
            color: var(--accent-tag);
            padding: 3px 10px;
            border-radius: var(--radius-tag);
            font-size: 12px;
            font-weight: 500;
        }
        .info-meta .read-more {
            margin-left: auto;
            font-size: 14px;
            color: var(--accent-primary);
        }

        /* ===== FAQ ===== */
        .faq-section .section-inner {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
        }
        .faq-left {
            grid-column: 1 / span 4;
        }
        .faq-right {
            grid-column: 6 / span 7;
        }
        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 12px;
            transition: background .3s;
        }
        .faq-item.open {
            background: rgba(255, 255, 255, 0.05);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            gap: 16px;
        }
        .faq-item.open .faq-question {
            color: var(--accent-primary);
        }
        .faq-icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            border: 1.5px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--text-secondary);
            transition: all .35s;
        }
        .faq-item.open .faq-icon {
            background: var(--accent-primary);
            border-color: var(--accent-primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease, padding .3s ease;
            padding: 0 20px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 24px;
            padding-top: 4px;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 120px 0;
            text-align: center;
            background: #070B14;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 900px;
            height: 900px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(43, 209, 255, 0.12) 0%, rgba(124, 108, 255, 0.08) 40%, transparent 70%);
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 1;
            max-width: 720px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .cta-inner p {
            font-size: 17px;
            color: var(--text-secondary);
            margin-bottom: 40px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #070B14;
            padding: 80px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 48px;
        }
        .footer-brand .brand {
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            max-width: 260px;
            line-height: 1.75;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--text-primary);
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 5px 0;
            transition: color .25s, padding-left .25s;
        }
        .footer-col a:hover {
            color: var(--accent-primary);
            padding-left: 4px;
        }
        .contact-line {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 4px 0;
        }
        .contact-line i {
            width: 16px;
            color: var(--accent-primary);
            font-size: 13px;
        }
        .footer-bottom {
            margin-top: 60px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== 移动端固定条 ===== */
        .mobile-cta-bar {
            display: none;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1200px) {
            .container-x {
                max-width: 1024px;
            }
            .nav-links {
                gap: 16px;
            }
            .search-box {
                width: 160px;
            }
        }
        @media (max-width: 992px) {
            .section {
                padding: 72px 0;
            }
            .alt-img {
                grid-column: span 5;
            }
            .alt-text {
                grid-column: span 7;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-content {
                grid-column: 1 / span 7;
            }
            .hero-visual {
                grid-column: 9 / span 4;
            }
        }
        @media (max-width: 768px) {
            .site-header .nav-links,
            .site-header .search-box {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .section {
                padding: 64px 0;
            }
            .section-title {
                font-size: 28px;
            }
            .hero-section {
                padding: 110px 0 60px;
                min-height: auto;
            }
            .hero-grid {
                grid-template-columns: 1fr;
            }
            .hero-content {
                grid-column: 1;
            }
            .hero-visual {
                grid-column: 1;
                margin-top: 24px;
            }
            .hero-title {
                font-size: 34px;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-ghost {
                width: 100%;
            }
            .alt-row {
                grid-template-columns: 1fr;
            }
            .alt-img,
            .alt-text {
                grid-column: 1;
            }
            .banner-strip {
                height: 160px;
                margin: 60px 0;
            }
            .data-grid {
                grid-template-columns: 1fr;
            }
            .faq-left {
                grid-column: 1;
            }
            .faq-right {
                grid-column: 1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .info-row {
                flex-direction: column;
                align-items: flex-start;
            }
            .info-thumb {
                width: 100%;
                height: 180px;
            }
            .mobile-cta-bar {
                display: flex;
                position: fixed;
                bottom: 0;
                left: 0;
                right: 0;
                height: 64px;
                background: rgba(11, 17, 31, 0.92);
                -webkit-backdrop-filter: blur(14px);
                backdrop-filter: blur(14px);
                border-top: 1px solid rgba(255, 255, 255, 0.1);
                align-items: center;
                justify-content: space-between;
                padding: 0 20px;
                z-index: 997;
            }
            .mobile-cta-bar .bar-brand {
                font-size: 15px;
                font-weight: 600;
                color: var(--text-primary);
            }
            .mobile-cta-bar .btn-primary {
                padding: 10px 24px;
                font-size: 15px;
            }
            .site-footer {
                padding-bottom: 96px;
            }
        }
        @media (max-width: 576px) {
            .container-x {
                padding: 0 16px;
            }
            .hero-stats {
                gap: 20px;
            }
            .hero-title {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
        }

        /* 背景网格纹理 */
        .grid-texture {
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 48px 48px;
        }

        /* 页面面包屑 */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            padding: 104px 0 0;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--accent-primary);
        }
        .breadcrumb i {
            font-size: 12px;
        }