/* Design Philosophy: 夜航流媒体中控台；以深海蓝、石墨灰、珊瑚橙建立演播室与视频平台融合的原创视觉体系。 */
:root {
  --bg: #08111e;
  --bg-2: #0f1b2f;
  --panel: rgba(9, 19, 34, 0.88);
  --panel-soft: rgba(19, 31, 52, 0.82);
  --line: rgba(183, 203, 235, 0.16);
  --line-strong: rgba(255, 255, 255, 0.18);
  --text: #f2f7ff;
  --muted: #a8b7cd;
  --accent: #ff8a63;
  --accent-2: #ffbb7d;
  --cold: #6ad1ff;
  --card-shadow: 0 22px 60px rgba(0,0,0,.35);
  --radius: 28px;
  --radius-sm: 20px;
  --container: 1240px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 15%, rgba(255,138,99,.16), transparent 26%),
    radial-gradient(circle at 82% 12%, rgba(106,209,255,.10), transparent 25%),
    linear-gradient(180deg, #06101b 0%, #0b1423 46%, #091120 100%);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; border: 0; }
button, input { font: inherit; }
.shell { width: min(calc(100% - 28px), var(--container)); margin: 0 auto; padding: 22px 0 48px; }
.site-header {
  position: sticky; top: 10px; z-index: 50;
  background: rgba(4, 11, 21, .78);
  backdrop-filter: blur(20px);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 16px 20px;
  box-shadow: var(--card-shadow);
}
.header-row { display: flex; align-items: center; gap: 22px; justify-content: space-between; }
.brand-lockup { display: flex; align-items: center; gap: 14px; min-width: 0; }
.brand-lockup strong { font-family: "Noto Serif SC", serif; font-size: 1.08rem; letter-spacing: .02em; }
.brand-lockup span { display: block; color: var(--muted); font-size: 12px; letter-spacing: .18em; text-transform: uppercase; }
.nav-toggle { display: none; border: 0; color: #131722; background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-radius: 999px; padding: 12px 18px; font-weight: 700; }
.top-nav { display: flex; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.top-nav a {
  padding: 10px 14px; border-radius: 999px; color: var(--muted);
  background: rgba(255,255,255,.03); border: 1px solid transparent; transition: .28s ease;
}
.top-nav a:hover, .top-nav a.is-active { background: rgba(255,138,99,.14); border-color: rgba(255,138,99,.26); color: var(--text); }
.search-strip {
  margin-top: 16px; padding: 16px 18px; border-radius: 24px; border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  display: grid; grid-template-columns: 190px 1fr; gap: 14px; align-items: center;
}
.search-strip strong { font-size: 13px; letter-spacing: .16em; text-transform: uppercase; color: var(--accent-2); }
.search-form { display: flex; gap: 12px; }
.search-form input {
  width: 100%; border: 1px solid rgba(255,255,255,.14); border-radius: 18px; padding: 14px 16px;
  background: rgba(0,0,0,.2); color: var(--text);
}
.search-form button, .primary-btn, .share-btn, .mcp-btn {
  border: 0; border-radius: 18px; padding: 14px 18px; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #131722;
  box-shadow: 0 12px 28px rgba(255,138,99,.22);
}
.search-note { grid-column: 2 / 3; margin: 0; font-size: 13px; color: var(--muted); }
.hero { display: grid; grid-template-columns: 1.05fr .95fr; gap: 28px; align-items: center; padding: 34px 0 8px; }
.eyebrow { color: var(--accent-2); letter-spacing: .18em; text-transform: uppercase; font-size: 12px; margin: 0 0 12px; }
h1, h2, h3, h4 { margin: 0; line-height: 1.12; }
h1 { font-family: "Noto Serif SC", serif; font-size: clamp(2.45rem, 5vw, 5rem); max-width: 11ch; }
h2 { font-family: "Noto Serif SC", serif; font-size: clamp(1.8rem, 3vw, 3rem); }
.hero-copy p, .section-head p, .card p, .footer-column p, .expert-copy p, .inner-intro { color: var(--muted); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin: 24px 0; }
.ghost-btn { padding: 14px 18px; border-radius: 18px; border: 1px solid var(--line); background: rgba(255,255,255,.03); color: var(--text); }
.tag-row { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-row span, .partner-wall span {
  padding: 9px 14px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255,255,255,.03);
  color: #ffe2d1;
}
.hero-media, .visual-card, .portrait-frame, .community-wrap { position: relative; }
.hero-media img, .visual-card img, .portrait-frame img, .community-photo img, .media-panel img {
  width: 100%; height: 100%; object-fit: cover; border-radius: 34px; box-shadow: var(--card-shadow);
}
.hero-float {
  position: absolute; right: 18px; bottom: 18px; width: min(360px, 82%); padding: 18px 20px;
  border-radius: 24px; background: rgba(5,13,24,.82); backdrop-filter: blur(12px); border: 1px solid var(--line-strong);
}
.hero-float span { display: block; color: var(--accent-2); letter-spacing: .14em; text-transform: uppercase; font-size: 12px; }
.hero-float strong { display: block; margin-top: 6px; font-size: 1.18rem; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 16px 0 20px; }
.stat-card, .video-card, .mini-card, .community-card, .expert-card, .json-card, .faq-item, .review-card, .contact-card, .mcp-card {
  background: linear-gradient(180deg, rgba(255,255,255,.055), rgba(255,255,255,.025));
  border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--card-shadow);
}
.stat-card { padding: 18px; }
.stat-card strong { display: block; font-size: 1.8rem; color: var(--text); }
.stat-card span { color: var(--muted); }
.section { margin: 28px 0; padding: 30px; border-radius: 38px; background: linear-gradient(180deg, rgba(255,255,255,.045), rgba(255,255,255,.02)); border: 1px solid var(--line); }
.section-head { max-width: 760px; margin-bottom: 22px; }
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.video-poster { position: relative; aspect-ratio: 16/10; overflow: hidden; border-radius: 26px 26px 0 0; }
.video-poster::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 30%, rgba(5,13,24,.55) 100%); }
.video-poster img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.video-card:hover .video-poster img, .video-card.is-hover .video-poster img { transform: scale(1.04); }
.play-button {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%) scale(.85);
  width: 74px; height: 74px; border-radius: 999px; display: grid; place-items: center; z-index: 2;
  border: 1px solid rgba(255,255,255,.28); background: rgba(255,138,99,.92); color: #10151f; font-size: 30px; font-weight: 700;
  opacity: 0; transition: .28s ease;
}
.video-card:hover .play-button, .video-card.is-hover .play-button { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.video-badge { position: absolute; left: 14px; top: 14px; z-index: 2; padding: 8px 12px; border-radius: 999px; background: rgba(5,13,24,.72); border: 1px solid rgba(255,255,255,.15); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
.video-copy { padding: 18px; }
.video-copy h3 { font-size: 1.15rem; margin-bottom: 10px; }
.video-copy p { margin: 0; color: var(--muted); }
.video-meta { margin-top: 14px; color: #ffccb4; font-size: 13px; }
.dual-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 24px; align-items: center; }
.mini-grid, .ai-grid, .community-grid, .expert-grid, .how-grid, .json-grid, .faq-review, .contact-grid, .mcp-grid { display: grid; gap: 16px; }
.mini-grid { grid-template-columns: repeat(2, 1fr); }
.ai-grid { grid-template-columns: repeat(4, 1fr); }
.community-grid { grid-template-columns: repeat(4, 1fr); }
.how-grid { grid-template-columns: repeat(4, 1fr); }
.expert-grid { grid-template-columns: repeat(2, 1fr); }
.json-grid { grid-template-columns: repeat(2, 1fr); }
.faq-review { grid-template-columns: 1fr 1fr; gap: 24px; }
.contact-grid { grid-template-columns: 1.1fr .9fr; gap: 18px; }
.mini-card, .community-card, .json-card, .contact-card, .mcp-card { padding: 20px; }
.mini-card h3, .community-card h3, .json-card h3, .contact-card h3, .mcp-card h3 { font-size: 1.08rem; margin-bottom: 10px; }
.ai-card { padding: 20px; }
.ai-card h3 { margin-bottom: 10px; font-size: 1.08rem; }
.ai-card p { margin: 0; color: var(--muted); }
.community-shell { overflow: hidden; background: linear-gradient(135deg, rgba(255,138,99,.08), rgba(106,209,255,.07), rgba(255,255,255,.02)); }
.community-bg { position: absolute; inset: 0; opacity: .28; }
.community-content { position: relative; }
.community-card span, .review-card span { display: block; margin-top: 12px; color: var(--accent-2); }
.expert-card { display: grid; grid-template-columns: 260px 1fr; overflow: hidden; }
.expert-card img { height: 100%; object-fit: cover; }
.expert-copy { padding: 18px 20px; }
.expert-copy p { margin: 0 0 8px; }
.expert-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }
.expert-actions a { padding: 12px 14px; border-radius: 16px; border: 1px solid var(--line); background: rgba(255,255,255,.03); }
.partner-wall { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 20px; }
.partner-wall span { display: flex; align-items: center; justify-content: center; min-height: 78px; font-weight: 700; }
.how-card span { width: 48px; height: 48px; display: inline-grid; place-items: center; border-radius: 18px; background: rgba(255,138,99,.14); margin-bottom: 12px; font-weight: 800; }
.how-card h3 { margin-bottom: 8px; }
.mcp-status { margin-top: 16px; padding: 16px 18px; border-radius: 18px; background: rgba(255,255,255,.04); border: 1px dashed rgba(255,255,255,.14); color: var(--text); }
.json-card pre { margin: 0; padding: 16px; border-radius: 20px; background: #050c16; color: #ffd6c5; overflow: auto; max-height: 400px; font-size: 12px; line-height: 1.65; }
.faq-list { display: grid; gap: 12px; }
.faq-item { padding: 18px; }
.faq-item summary { cursor: pointer; font-weight: 700; }
.faq-item p { margin: 12px 0 0; color: var(--muted); }
.review-card { padding: 18px 20px; }
.media-panel { display: grid; grid-template-columns: .95fr 1.05fr; gap: 18px; align-items: center; }
.share-row, .qr-row { display: flex; flex-wrap: wrap; gap: 14px; }
.share-btn { display: flex; align-items: center; justify-content: space-between; gap: 14px; min-width: 220px; }
.share-btn span { display: inline-flex; padding: 6px 10px; border-radius: 999px; background: rgba(5,13,24,.16); }
.qr-card { display: flex; flex-direction: column; gap: 10px; align-items: center; color: var(--muted); }
.site-footer { margin-top: 32px; padding: 32px; border-radius: 38px; background: rgba(255,255,255,.04); border: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 1.05fr .75fr .8fr .9fr; gap: 20px; }
.footer-column h4 { margin: 0 0 8px; }
.footer-column a, .footer-column p { display: block; margin: 0 0 8px; color: var(--muted); }
.brand-line { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.crumbs { color: #ffd2be; margin-top: 14px; }
.crumbs a { color: var(--text); }
.inner-hero { display: grid; grid-template-columns: 1fr .88fr; gap: 24px; align-items: center; padding: 30px 0 10px; }
.inner-panel { padding: 22px 0; }
.inner-panel h1 { max-width: 12ch; }
.kpi-bar { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 24px; }
.kpi-item { padding: 14px; border-radius: 20px; border: 1px solid var(--line); background: rgba(255,255,255,.03); }
.kpi-item strong { display: block; font-size: 1.35rem; }
.logo-mark { width: 48px; height: 48px; flex: 0 0 auto; }
.logo-word { width: 184px; max-width: 48vw; }
.inline-note { color: #ffcfbb; font-size: 13px; }
.footer-mini-mcp { margin-top: 12px; padding: 14px 16px; border-radius: 18px; border: 1px dashed rgba(255,255,255,.14); color: var(--muted); }
.mobile-only { display: none; }
@media (max-width: 1120px) {
  .hero, .dual-grid, .inner-hero, .faq-review, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
  .stats, .ai-grid, .community-grid, .how-grid, .expert-grid, .json-grid, .video-grid, .partner-wall { grid-template-columns: repeat(2, 1fr); }
  .expert-card, .media-panel { grid-template-columns: 1fr; }
  .search-strip { grid-template-columns: 1fr; }
  .search-note { grid-column: auto; }
}
@media (max-width: 760px) {
  body { font-size: 15px; }
  .shell { width: min(calc(100% - 18px), var(--container)); padding-top: 12px; }
  .site-header { border-radius: 28px; padding: 14px 16px; }
  .nav-toggle { display: inline-flex; }
  .top-nav { display: none; flex-direction: column; width: 100%; padding-top: 14px; }
  .top-nav.open { display: flex; }
  .search-form { flex-direction: column; }
  .search-form button, .primary-btn, .ghost-btn, .share-btn, .mcp-btn { width: 100%; justify-content: center; }
  .stats, .ai-grid, .community-grid, .how-grid, .expert-grid, .json-grid, .video-grid, .partner-wall, .mini-grid, .kpi-bar { grid-template-columns: 1fr; }
  .section { padding: 22px; border-radius: 28px; }
  .hero-float { position: static; width: 100%; margin-top: 16px; }
  h1 { max-width: none; font-size: clamp(2rem, 10vw, 3rem); }
  .mobile-only { display: block; }
}