:root {
    --bg: #f7f4ee;
    --card: #ffffff;
    --ink: #1e293b;
    --muted: #64748b;
    --line: #e2e8f0;
    --brand: #b45309;
    --brand-dark: #78350f;
    --accent: #0f766e;
    --soft: #fff7ed;
    --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background: radial-gradient(circle at top left, #fff7ed 0, rgba(255,255,255,0) 32rem), var(--bg);
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.site-header, .site-footer, main { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.site-header { padding: 22px 0 12px; }
.topbar { display: flex; justify-content: space-between; gap: 16px; align-items: center; }
.brand, .footer-logo { display: inline-flex; align-items: center; gap: 12px; }
.brand strong { font-size: 28px; letter-spacing: 1px; }
.brand em { display: block; font-style: normal; color: var(--muted); font-size: 13px; margin-top: -6px; }
.domain-badge { border: 1px solid var(--line); border-radius: 999px; padding: 8px 14px; background: rgba(255,255,255,0.75); color: var(--brand-dark); font-size: 14px; }
.main-nav { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; padding: 12px; background: var(--card); border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); }
.main-nav a { padding: 9px 14px; border-radius: 999px; color: var(--muted); font-weight: 700; }
.main-nav a.active, .main-nav a:hover { background: var(--brand); color: #fff; }
.search-strip { display: grid; grid-template-columns: 160px 1fr; gap: 10px; align-items: center; margin-top: 14px; padding: 14px; background: #fff; border: 1px solid var(--line); border-radius: 20px; }
.search-strip label { font-weight: 800; color: var(--brand-dark); }
.search-box { display: flex; gap: 8px; }
.search-box input { flex: 1; border: 1px solid var(--line); border-radius: 14px; padding: 12px 14px; font-size: 15px; }
.search-box button, .primary-btn { border: 0; border-radius: 14px; padding: 12px 18px; background: var(--ink); color: #fff; font-weight: 800; cursor: pointer; }
#fakeSearchHint { grid-column: 2; margin: -4px 0 0; color: var(--muted); font-size: 13px; }
.hero { display: grid; grid-template-columns: 1.2fr .8fr; gap: 22px; align-items: stretch; margin-top: 22px; }
.hero-panel, .card, .feature-panel, .article-body, .breadcrumb { background: var(--card); border: 1px solid var(--line); border-radius: 28px; box-shadow: var(--shadow); }
.hero-panel { padding: 34px; position: relative; overflow: hidden; }
.hero-panel::after { content: "视频"; position: absolute; right: 26px; top: 18px; font-size: 88px; font-weight: 900; color: rgba(180,83,9,0.08); }
.kicker { color: var(--accent); font-weight: 900; letter-spacing: 1px; }
h1 { font-size: clamp(34px, 6vw, 60px); line-height: 1.1; margin: 8px 0 16px; }
h2 { font-size: clamp(24px, 3vw, 34px); margin: 0 0 14px; }
h3 { font-size: 20px; line-height: 1.35; margin: 8px 0; }
.hero-panel p, .section-intro { color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }
.secondary-btn { border: 1px solid var(--line); border-radius: 14px; padding: 11px 16px; background: #fff; font-weight: 800; }
.hero-aside { display: grid; gap: 14px; }
.stat-card { padding: 22px; border-radius: 24px; background: var(--soft); border: 1px solid #fed7aa; }
.stat-card strong { display: block; font-size: 28px; color: var(--brand-dark); }
.section { margin-top: 34px; }
.section-head { display: flex; justify-content: space-between; gap: 18px; align-items: end; margin-bottom: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.card, .feature-panel { padding: 22px; }
.card-meta { color: var(--muted); font-size: 13px; display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 8px; }
.card a.more { color: var(--brand); font-weight: 900; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.tag { display: inline-flex; border-radius: 999px; padding: 5px 10px; background: #ecfeff; color: #155e75; font-weight: 800; font-size: 12px; }
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.video-card { background: #fff; border: 1px solid var(--line); border-radius: 26px; overflow: hidden; box-shadow: var(--shadow); }
.video-frame { position: relative; aspect-ratio: 16 / 10; background: #111827; overflow: hidden; }
.video-frame video { width: 100%; height: 100%; object-fit: cover; opacity: .92; }
.play-button { position: absolute; inset: 50% auto auto 50%; transform: translate(-50%, -50%) scale(.86); width: 58px; height: 58px; border: 0; border-radius: 999px; background: rgba(255,255,255,.9); color: var(--brand-dark); font-size: 22px; opacity: 0; transition: .2s ease; cursor: pointer; }
.video-card:hover .play-button, .video-card:focus-within .play-button { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.video-label { position: absolute; left: 12px; top: 12px; border-radius: 999px; background: rgba(15,23,42,.82); color: #fff; padding: 4px 10px; font-size: 12px; font-weight: 900; }
.video-body { padding: 18px; }
.metrics { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 14px 0 0; color: var(--muted); font-size: 13px; }
.topic-list, .faq-list, .comment-list { display: grid; gap: 14px; }
.topic-item, .faq-item, .comment-item { padding: 18px; background: #fff; border: 1px solid var(--line); border-radius: 22px; }
.faq-item summary { cursor: pointer; font-weight: 900; color: var(--brand-dark); }
.author { display: flex; gap: 14px; align-items: flex-start; }
.avatar { width: 56px; height: 56px; border-radius: 18px; background: linear-gradient(135deg, #f59e0b, #0f766e); color: #fff; display: grid; place-items: center; font-weight: 900; font-size: 22px; flex: none; }
.breadcrumb { padding: 12px 18px; margin-top: 18px; color: var(--muted); font-size: 14px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 22px; margin-top: 22px; }
.article-body { padding: 34px; }
.article-body h1 { font-size: clamp(30px, 4vw, 46px); }
.article-body p { margin: 12px 0; }
.article-cover { border-radius: 24px; overflow: hidden; margin: 18px 0; border: 1px solid var(--line); }
.article-cover figcaption { padding: 10px 12px; color: var(--muted); font-size: 13px; background: #fff; }
.sidebar { display: grid; gap: 16px; align-content: start; }
.sidebar .card { box-shadow: none; }
.site-footer { margin-top: 44px; padding: 26px 0 34px; }
.footer-grid { display: grid; grid-template-columns: 220px 1fr 1fr; gap: 20px; background: #111827; color: #e5e7eb; border-radius: 28px; padding: 24px; }
.footer-grid p { color: #cbd5e1; margin: 8px 0 0; }
.footer-logo span { font-size: 22px; font-weight: 900; }
.notice { padding: 14px 16px; border-radius: 18px; background: #ecfdf5; border: 1px solid #bbf7d0; color: #166534; }
.table-like { display: grid; gap: 10px; }
.table-like div { display: grid; grid-template-columns: 140px 1fr; gap: 10px; padding: 12px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
@media (max-width: 920px) {
    .hero, .grid-3, .grid-2, .video-grid, .article-layout, .footer-grid { grid-template-columns: 1fr; }
    .section-head, .topbar { align-items: flex-start; flex-direction: column; }
    .search-strip { grid-template-columns: 1fr; }
    #fakeSearchHint { grid-column: 1; }
}
@media (max-width: 560px) {
    .site-header, .site-footer, main { width: min(100% - 20px, 1180px); }
    .hero-panel, .article-body { padding: 22px; border-radius: 22px; }
    .search-box { flex-direction: column; }
    .main-nav { border-radius: 18px; }
}