/* Design Philosophy: 未来片场界面 × 社区信号网络 | File Purpose: 呦呦视频全站外部CSS，兼顾影视传媒质感、搜索可读性与移动端体验 */
:root {
  --bg: #07111a;
  --panel: #0d1825;
  --panel-soft: #132233;
  --line: rgba(123, 185, 193, 0.22);
  --text: #eef3f7;
  --muted: #9cb4c2;
  --accent: #f77e52;
  --accent-2: #5ed3c6;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
  --radius: 24px;
  --container: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(94, 211, 198, 0.08), transparent 28%),
    radial-gradient(circle at top right, rgba(247, 126, 82, 0.10), transparent 24%),
    linear-gradient(180deg, #07111a 0%, #0c1624 32%, #09111d 100%);
  color: var(--text);
  line-height: 1.72;
}

a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; height: auto; border: 0; }
button, input { font: inherit; }
.container { width: min(var(--container), calc(100% - 32px)); margin: 0 auto; }
.site-shell { min-height: 100vh; }
.site-header { position: sticky; top: 0; z-index: 40; backdrop-filter: blur(16px); background: rgba(7, 17, 26, 0.86); border-bottom: 1px solid rgba(255,255,255,0.05); }
.nav-row, .info-grid, .search-grid, .breadcrumb-row, .section-head, .split-section, .editorial-grid, .partner-grid, .contact-grid, .footer-grid { display: grid; gap: 24px; }
.nav-row { grid-template-columns: 220px 1fr auto; align-items: center; padding: 18px 0; }
.logo-wrap img { max-width: 220px; }
.main-nav { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
.nav-link {
  padding: 10px 14px; border-radius: 999px; color: var(--muted); border: 1px solid transparent;
  transition: 0.28s ease; background: transparent;
}
.nav-link:hover, .nav-link.active { color: var(--text); border-color: rgba(94, 211, 198, 0.28); background: rgba(255,255,255,0.03); }
.mobile-toggle {
  display: none; border: 1px solid rgba(94,211,198,0.28); background: transparent; color: var(--text); border-radius: 999px; padding: 10px 16px;
}
.info-strip, .search-strip, .tag-marquee { border-top: 1px solid rgba(255,255,255,0.04); }
.info-grid { grid-template-columns: 1fr 1fr; padding: 12px 0; color: var(--muted); font-size: 14px; }
.search-grid { grid-template-columns: 1.2fr 1fr; align-items: center; padding: 18px 0; }
.search-title { margin: 4px 0 0; font-size: clamp(18px, 2vw, 24px); }
.search-form { display: flex; gap: 12px; }
.search-form input {
  flex: 1; background: rgba(255,255,255,0.05); color: var(--text); border: 1px solid rgba(255,255,255,0.08); border-radius: 999px; padding: 14px 16px;
}
.search-form button, .primary-btn, .ghost-btn, .share-btn {
  border-radius: 999px; padding: 14px 18px; border: 1px solid transparent; transition: 0.28s ease; cursor: pointer;
}
.search-form button, .primary-btn { background: linear-gradient(135deg, var(--accent), #f4a164); color: #fff; box-shadow: 0 12px 30px rgba(247,126,82,0.26); }
.ghost-btn, .share-btn {
  background: rgba(255,255,255,0.03); color: var(--text); border-color: rgba(94,211,198,0.28);
}
.primary-btn:hover, .ghost-btn:hover, .share-btn:hover, .search-form button:hover { transform: translateY(-2px); }
.tag-marquee p, .breadcrumb-row { color: var(--muted); }
.tag-marquee p { margin: 0; padding: 12px 0 18px; font-size: 14px; }
.breadcrumb-row { grid-template-columns: 1fr auto; align-items: center; padding: 0 0 18px; font-size: 14px; }
.breadcrumb a { color: var(--text); }
.crumb-sep { color: rgba(255,255,255,0.3); margin: 0 8px; }
.eyebrow { margin: 0 0 8px; color: var(--accent-2); letter-spacing: 0.08em; text-transform: uppercase; font-size: 12px; }
.hero-section, .sub-hero-section { padding: 56px 0 24px; }
.hero-grid { display: grid; grid-template-columns: 1.08fr 0.92fr; gap: 30px; align-items: center; }
.hero-copy h1 { margin: 0 0 18px; font-size: clamp(34px, 5vw, 62px); line-height: 1.08; letter-spacing: -0.02em; }
.hero-lead, .section-copy, .mini-note p, .feature-card p, .story-card p, .expert-card p, .review-card p, .trust-card p, .contact-copy p, .json-panel pre { color: var(--muted); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 24px; }
.stat-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 28px; }
.stat-grid article, .feature-card, .story-card, .expert-card, .review-card, .trust-card, .json-panel, .howto-card, .aside-panel, .article-panel, .hero-media, .office-photo, .share-box {
  background: linear-gradient(180deg, rgba(19,34,51,0.96), rgba(11,20,31,0.96));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.stat-grid article { padding: 18px; }
.stat-grid strong { display: block; font-size: 24px; color: var(--text); margin-bottom: 6px; }
.hero-media, .office-photo { overflow: hidden; }
.hero-media img, .office-photo img { aspect-ratio: 16/10; object-fit: cover; }
.hero-media figcaption { padding: 18px 20px 22px; }
.metric-line { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; color: var(--muted); font-size: 13px; }
section { padding: 24px 0; }
.split-section, .section-head { grid-template-columns: 1fr auto; align-items: end; margin-bottom: 18px; }
.section-head h2, .split-section h2, .contact-copy h2, .article-panel h2, .aside-panel h3, .howto-card h3, .footer-title { margin: 0; font-size: clamp(24px, 3vw, 36px); line-height: 1.16; }
.mini-note { min-width: 280px; padding: 22px; }
.feature-grid, .video-grid, .expert-grid, .review-grid, .trust-grid, .json-grid { display: grid; gap: 18px; }
.feature-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.feature-card, .trust-card { padding: 22px; }
.feature-card h3, .video-copy h3, .story-card h3, .expert-card h3, .review-card h3, .trust-card h3 { margin: 0 0 10px; font-size: 22px; }
.video-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.video-card {
  position: relative; min-height: 400px; overflow: hidden; border-radius: 28px;
  background: linear-gradient(180deg, rgba(4,8,12,0.1), rgba(4,8,12,0.7)), var(--card-image) center/cover no-repeat;
  border: 1px solid rgba(255,255,255,0.08); box-shadow: var(--shadow);
  display: flex; align-items: flex-end; padding: 22px; isolation: isolate;
}
.video-card::before {
  content: attr(data-section); position: absolute; left: 18px; top: 18px; padding: 6px 12px; border-radius: 999px;
  background: rgba(7,17,26,0.78); color: var(--accent-2); font-size: 12px; letter-spacing: 0.06em;
  border: 1px solid rgba(94,211,198,0.28);
}
.play-indicator {
  position: absolute; left: 50%; top: 46%; transform: translate(-50%, -50%) scale(0.84);
  width: 88px; height: 88px; border-radius: 50%; display: grid; place-items: center;
  background: rgba(247, 126, 82, 0.92); color: #fff; font-size: 30px; opacity: 0; transition: 0.3s ease; box-shadow: 0 12px 26px rgba(0,0,0,0.35);
}
.video-card:hover .play-indicator, .video-card.is-hover .play-indicator { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.video-copy {
  position: relative; z-index: 2; width: 100%; padding: 18px; border-radius: 22px;
  background: linear-gradient(180deg, rgba(9,17,29,0.05), rgba(9,17,29,0.78)); backdrop-filter: blur(8px);
}
.editorial-grid, .contact-grid { grid-template-columns: 1.1fr 0.9fr; }
.article-panel, .aside-panel, .howto-card, .contact-copy { padding: 26px; }
.story-card, .review-card { padding: 22px; }
.story-card span, .feedback-tip { display: inline-flex; margin-bottom: 12px; color: var(--accent-2); font-size: 12px; }
.chip-grid, .scope-grid, .logo-wall, .share-row, .qr-grid { display: flex; flex-wrap: wrap; gap: 10px; }
.chip, .partner-pill {
  padding: 10px 14px; border-radius: 999px; background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.08); color: var(--text); font-size: 14px;
}
.bullet-list, .howto-list, .contact-list, .expert-card ul { margin: 16px 0 0; padding-left: 20px; color: var(--muted); }
.faq-grid { display: grid; gap: 14px; }
.faq-item {
  border-radius: 22px; background: linear-gradient(180deg, rgba(19,34,51,0.96), rgba(11,20,31,0.96)); border: 1px solid var(--line); padding: 0 22px; box-shadow: var(--shadow);
}
.faq-item summary { cursor: pointer; list-style: none; padding: 18px 0; font-size: 18px; font-weight: 700; }
.faq-item p { margin: 0 0 18px; color: var(--muted); }
.trust-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.contact-grid { align-items: center; }
.office-photo, .contact-copy { min-height: 100%; }
.review-grid, .json-grid, .expert-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.expert-card { padding: 22px; }
.json-panel { padding: 18px 22px; }
.json-panel summary { cursor: pointer; font-weight: 700; }
.json-panel pre { overflow: auto; white-space: pre-wrap; word-break: break-word; font-size: 13px; margin-top: 14px; }
.site-footer { padding: 20px 0 48px; }
.footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.footer-grid section { padding: 26px; background: linear-gradient(180deg, rgba(19,34,51,0.96), rgba(11,20,31,0.96)); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.footer-title { font-size: 28px; margin-bottom: 18px; }
.qr-grid figure { margin: 0; text-align: center; }
.qr-grid figcaption { color: var(--muted); font-size: 13px; margin-top: 10px; }
.share-box { padding: 16px; margin-top: 18px; }
.share-box h3 { margin: 0 0 10px; font-size: 16px; }
.share-box pre { margin: 0; overflow: auto; color: var(--muted); font-size: 12px; white-space: pre-wrap; }
.update-time { color: var(--accent-2); font-weight: 700; margin-top: 18px; }
.copyright { color: var(--muted); margin: 0; }

@media (max-width: 1100px) {
  .hero-grid, .feature-grid, .video-grid, .editorial-grid, .contact-grid, .trust-grid, .review-grid, .json-grid, .expert-grid, .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split-section, .section-head, .search-grid, .info-grid, .breadcrumb-row { grid-template-columns: 1fr; }
}

@media (max-width: 780px) {
  .container { width: min(var(--container), calc(100% - 24px)); }
  .nav-row { grid-template-columns: 1fr auto; }
  .main-nav {
    display: none; grid-column: 1 / -1; justify-content: flex-start; padding-bottom: 14px;
  }
  .main-nav.is-open { display: flex; }
  .mobile-toggle { display: inline-flex; }
  .hero-grid, .feature-grid, .video-grid, .editorial-grid, .contact-grid, .trust-grid, .review-grid, .json-grid, .expert-grid, .footer-grid, .stat-grid { grid-template-columns: 1fr; }
  .hero-copy h1 { font-size: 34px; }
  .search-form { flex-direction: column; }
  .video-card { min-height: 340px; }
  .section-head h2, .split-section h2, .contact-copy h2, .article-panel h2, .aside-panel h3, .howto-card h3, .footer-title { font-size: 28px; }
}