:root {
  --bg: #071224;
  --bg-soft: #0d1f36;
  --panel: rgba(10, 24, 44, 0.92);
  --line: rgba(146, 218, 255, 0.18);
  --text: #edf8ff;
  --muted: #b8d0e2;
  --gold: #ffd79d;
  --ice: #8ce2ff;
  --shadow: 0 20px 48px rgba(0,0,0,0.25);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at top, rgba(79,172,255,0.16), transparent 28%), linear-gradient(180deg, #071224 0%, #0a1730 48%, #07101c 100%);
  color: var(--text);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1240px, calc(100% - 24px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 30; background: rgba(7,18,36,0.84); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.topbar, .nav-row, .hero, .metrics, .section-head, .footer-bottom, .topic-grid, .topic-cards, .footer-grid, .contact-grid, .double-grid { display: grid; gap: 18px; }
.topbar { grid-template-columns: 1fr auto; align-items: center; padding: 16px 0 12px; }
.brand { display: inline-flex; gap: 12px; align-items: center; }
.brand img { width: 56px; height: 56px; object-fit: contain; filter: drop-shadow(0 0 18px rgba(115, 210, 255, 0.35)); }
.brand strong, h1, h2, h3, h4, h5, h6 { font-family: "Noto Serif SC", "STSong", serif; }
.brand strong { font-size: 24px; letter-spacing: 0.08em; display: block; }
.brand span, .muted, .lead, .faq-item p, .review-card p, .card p, .topic-side p, .topic-card p, .contact-card p, .footer-grid p, li, pre { color: var(--muted); line-height: 1.8; }
.badge { display: inline-flex; align-items: center; gap: 8px; padding: 10px 14px; border-radius: 999px; border: 1px solid rgba(255, 214, 153, 0.26); background: rgba(255, 188, 88, 0.08); color: var(--gold); }
.nav-row { grid-template-columns: 1.3fr 1fr; align-items: start; padding-bottom: 16px; }
.nav { display: flex; flex-wrap: wrap; gap: 10px; }
.nav a { padding: 12px 14px; border-radius: 999px; border: 1px solid var(--line); background: rgba(11,25,46,0.78); font-weight: 700; transition: 0.2s ease; }
.nav a:hover, .nav a.current { color: var(--gold); transform: translateY(-2px); border-color: rgba(255, 214, 153, 0.4); }
.search-panel { padding: 14px; border-radius: 24px; border: 1px solid var(--line); background: linear-gradient(135deg, rgba(9, 22, 41, 0.96), rgba(18, 44, 77, 0.76)); box-shadow: var(--shadow); }
.search-box { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
.search-box input { padding: 14px 16px; border-radius: 999px; border: 1px solid rgba(141, 220, 255, 0.14); background: rgba(2,10,20,0.48); color: #eff9ff; }
.search-box button, .btn, .share-btn { border: 0; border-radius: 999px; padding: 14px 18px; font-weight: 700; background: linear-gradient(135deg, #98e6ff, #ffd18f); color: #08111f; cursor: pointer; }
.search-note { margin: 10px 0 0; font-size: 14px; }
.breadcrumb { padding: 18px 0 10px; color: #89b7d4; }
.hero { grid-template-columns: 0.95fr 1.05fr; align-items: stretch; padding: 20px 0 14px; }
.hero-copy, .hero-visual, .panel, .card, .faq-item, .review-card, .topic-side, .topic-card, .contact-card, .share-box { border-radius: 28px; border: 1px solid var(--line); background: linear-gradient(180deg, rgba(10,25,46,0.92), rgba(8,17,31,0.92)); box-shadow: var(--shadow); position: relative; overflow: hidden; }
.hero-copy { padding: 40px; }
.hero-copy h1 { margin: 0; font-size: clamp(32px, 5vw, 64px); line-height: 1.14; }
.hero-copy p { font-size: 17px; }
.hero-visual { min-height: 580px; }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }
.overlay-card { position: absolute; right: 18px; bottom: 18px; width: min(340px, calc(100% - 36px)); padding: 18px; border-radius: 22px; background: rgba(7,18,36,0.8); border: 1px solid rgba(148,220,255,0.2); }
.section { padding: 12px 0; }
.section-head { max-width: 880px; }
.section-head h2 { margin: 0; font-size: clamp(28px, 3vw, 46px); }
.metrics { grid-template-columns: repeat(4, 1fr); }
.metric { padding: 18px; border-radius: 22px; border: 1px solid rgba(141,220,255,0.12); background: rgba(255,255,255,0.04); }
.metric strong { display: block; margin-bottom: 6px; font-size: 24px; color: var(--gold); }
.video-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; padding: 18px; border-radius: 32px; background-size: cover; background-position: center; border: 1px solid var(--line); }
.video-card { display: grid; gap: 12px; }
.video-cover { min-height: 330px; display: flex; flex-direction: column; justify-content: space-between; padding: 16px; border-radius: 24px; border: 1px solid rgba(148,220,255,0.16); background: linear-gradient(180deg, rgba(0,0,0,0.22), rgba(0,0,0,0.72)), linear-gradient(135deg, rgba(152,229,255,0.22), rgba(255,210,144,0.06)); }
.scene, .pill, .tag, .share-pill, .topic-points span { display: inline-flex; padding: 5px 10px; border-radius: 999px; background: rgba(255,214,151,0.12); color: var(--gold); font-size: 13px; }
.cover-top, .cover-bottom, .share-buttons, .tag-list, .topic-points, .action-row, .logo-wall { display: flex; flex-wrap: wrap; gap: 8px; }
.cover-top, .cover-bottom { justify-content: space-between; color: #d8edfb; font-size: 13px; }
.play-btn { align-self: center; width: 68px; height: 68px; border-radius: 999px; border: 0; background: rgba(255,255,255,0.12); color: #fff; font-size: 24px; opacity: 0; transform: scale(0.9); transition: 0.2s ease; cursor: pointer; }
.video-card:hover .play-btn, .topic-card:hover .play-btn { opacity: 1; transform: scale(1); }
.video-body { padding: 0 4px; }
.video-body h3, .card h3, .topic-card h3, .contact-card h3, .share-box h3 { margin: 0 0 8px; }
.card-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.card { padding: 20px; }
.card ul { margin: 0; padding-left: 18px; }
.community-band { padding: 22px; border-radius: 32px; background-size: cover; background-position: center; border: 1px solid var(--line); }
.double-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.expert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
pre { white-space: pre-wrap; word-break: break-word; margin: 0; }
.logo-wall span, .tag-list span { padding: 9px 14px; border-radius: 999px; background: rgba(140,217,255,0.08); border: 1px solid rgba(132,211,255,0.18); color: #ddf3ff; }
.join-list { margin: 0; padding-left: 22px; }
.contact-grid { grid-template-columns: 1.2fr 1fr; }
.storefront { min-height: 240px; border-radius: 24px; margin-bottom: 16px; display: grid; place-items: center; background: linear-gradient(180deg, rgba(8,17,31,0.24), rgba(8,17,31,0.68)), linear-gradient(135deg, rgba(133,224,255,0.25), rgba(255,210,145,0.08)); color: #d9f2ff; }
.review-grid, .faq-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.review-card, .faq-item, .share-box, .topic-side, .topic-card { padding: 18px; }
.review-stars { color: var(--gold); letter-spacing: 0.16em; }
.faq-item summary { cursor: pointer; font-weight: 800; }
.footer { margin-top: 26px; border-top: 1px solid var(--line); background: rgba(5,11,21,0.5); }
.footer-grid { grid-template-columns: 1.2fr 0.8fr 1fr; padding: 26px 0 14px; }
.footer-brand { display: inline-flex; gap: 12px; align-items: center; margin-bottom: 10px; }
.footer-brand img { width: 56px; height: 56px; object-fit: contain; }
.qr-grid { display: flex; gap: 12px; flex-wrap: wrap; }
.qr { width: 140px; }
.qr-art { aspect-ratio: 1; border-radius: 18px; display: grid; place-items: center; background: conic-gradient(from 180deg, rgba(152,230,255,0.9), rgba(255,215,151,0.95), rgba(152,230,255,0.9)); color: #08111f; font-weight: 800; margin-bottom: 8px; }
.qr-art.dark { background: linear-gradient(135deg, rgba(255,217,146,0.95), rgba(105,196,255,0.95)); }
.footer-bottom { grid-template-columns: repeat(3, auto); justify-content: space-between; padding-bottom: 18px; color: #9ec6de; font-size: 14px; }
.topic-grid { grid-template-columns: 1.15fr 0.85fr; padding: 20px 0 14px; }
.topic-cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.topic-thumb { min-height: 170px; display: flex; justify-content: space-between; align-items: start; padding: 14px; border-radius: 22px; border: 1px solid rgba(136,214,255,0.16); background: linear-gradient(135deg, rgba(141,220,255,0.18), rgba(255,208,139,0.08)); }
@media (max-width: 1180px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .card-grid, .expert-grid, .review-grid, .faq-grid, .topic-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nav-row, .hero, .footer-grid, .contact-grid, .double-grid, .topic-grid { grid-template-columns: 1fr; }
}
@media (max-width: 820px) {
  .topbar, .metrics, .video-grid, .card-grid, .expert-grid, .review-grid, .faq-grid, .footer-grid, .footer-bottom, .double-grid, .contact-grid, .topic-grid, .topic-cards { grid-template-columns: 1fr; }
  .nav { display: grid; }
  .nav a { text-align: center; }
  .search-box { grid-template-columns: 1fr; }
  .search-box button { width: 100%; }
  .hero-visual { min-height: 380px; }
  .hero-copy { padding: 24px; }
}