:root {
    --bg: #ffffff;
    --surface: #f7f8fb;
    --text: #141824;
    --muted: #5f6678;
    --line: #e7e9f0;
    --brand: #101828;
    --accent: #d93f21;
    --accent-soft: #fff0eb;
    --radius: 22px;
    --shadow: 0 18px 45px rgba(16, 24, 40, .10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; display: block; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.92); backdrop-filter: blur(18px); border-bottom: 1px solid var(--line); }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 14px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; font-size: 22px; color: var(--brand); }
.brand img { border-radius: 12px; }
.nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.nav a { padding: 8px 12px; border-radius: 999px; font-size: 14px; color: var(--muted); }
.nav a:hover, .nav a.active { background: var(--accent-soft); color: var(--accent); }
.search-wrap { padding: 0 0 14px; }
.search-form { display: flex; gap: 8px; background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 6px; }
.search-form input { flex: 1; border: 0; background: transparent; outline: 0; padding: 10px 14px; font-size: 15px; min-width: 0; }
.search-form button, .button { border: 0; cursor: pointer; border-radius: 999px; padding: 10px 18px; font-weight: 800; display: inline-flex; align-items: center; justify-content: center; }
.search-form button, .button.primary { background: var(--accent); color: white; box-shadow: 0 10px 22px rgba(217,63,33,.20); }
.button.secondary { background: var(--surface); color: var(--text); border: 1px solid var(--line); }
.search-result { margin: 6px 10px 0; color: var(--muted); font-size: 13px; }
.hero { display: grid; grid-template-columns: 1.05fr .95fr; gap: 34px; align-items: center; padding: 64px 0 48px; }
.hero-content, .page-hero { position: relative; }
.eyebrow { margin: 0 0 10px; color: var(--accent); font-weight: 900; letter-spacing: .03em; }
h1, h2, h3 { line-height: 1.25; margin-top: 0; color: var(--brand); }
h1 { font-size: clamp(36px, 6vw, 64px); margin-bottom: 18px; letter-spacing: -0.04em; }
h2 { font-size: clamp(26px, 4vw, 40px); margin-bottom: 12px; letter-spacing: -0.03em; }
h3 { font-size: 20px; margin-bottom: 8px; }
p { margin-top: 0; }
.hero-text { font-size: 18px; color: var(--muted); max-width: 700px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 26px 0 16px; }
.domain-line { color: var(--muted); }
.hero-media { margin: 0; border-radius: calc(var(--radius) + 8px); overflow: hidden; box-shadow: var(--shadow); background: var(--surface); }
.hero-media img { width: 100%; height: auto; }
.hero-media figcaption { padding: 12px 16px; color: var(--muted); font-size: 13px; }
.section { padding: 64px 0; }
.section.muted, .muted { background: var(--surface); }
.section-head { max-width: 760px; margin-bottom: 28px; }
.section-head p { color: var(--muted); }
.video-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.video-card { background: white; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: 0 10px 30px rgba(16,24,40,.06); transition: transform .2s ease, box-shadow .2s ease; }
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.video-cover { position: relative; aspect-ratio: 16/10; background: #101828; overflow: hidden; }
.video-cover video { width: 100%; height: 100%; object-fit: cover; opacity: .92; }
.play-button { position: absolute; inset: 50% auto auto 50%; transform: translate(-50%, -50%) scale(.85); width: 64px; height: 64px; border-radius: 50%; border: 0; background: rgba(255,255,255,.92); color: var(--accent); font-weight: 900; font-size: 20px; opacity: 0; transition: opacity .2s ease, transform .2s ease; cursor: pointer; }
.video-card:hover .play-button, .video-card.is-previewing .play-button { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.video-card.is-previewing .video-cover::after { content: '黑料网视频预览演示中'; position: absolute; left: 12px; bottom: 12px; background: rgba(16,24,40,.72); color: #fff; padding: 6px 10px; border-radius: 999px; font-size: 13px; }
.video-body { padding: 18px; }
.video-body p { color: var(--muted); }
.image-description { font-size: 12px; background: var(--surface); border-radius: 12px; padding: 8px; }
.tag-row, .metric-row { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 12px 0 0; list-style: none; }
.tag-row span, .metric-row li { background: var(--accent-soft); color: var(--accent); border-radius: 999px; padding: 5px 9px; font-size: 12px; font-weight: 800; }
.metric-row li { background: var(--surface); color: var(--muted); font-weight: 700; }
.card-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.info-card, .step-card, .review-card, .timeline article, details, .contact-panel, .cta-band { background: white; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: 0 8px 26px rgba(16,24,40,.05); }
.info-card p, .step-card p, .review-card p, .timeline p, details p { color: var(--muted); margin-bottom: 0; }
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.step-card span { display: inline-flex; width: 44px; height: 44px; border-radius: 14px; align-items: center; justify-content: center; background: var(--accent-soft); color: var(--accent); font-weight: 900; margin-bottom: 14px; }
.split { display: grid; grid-template-columns: .8fr 1.2fr; gap: 32px; align-items: start; }
.timeline { display: grid; gap: 14px; }
.timeline.full { max-width: 900px; }
time { color: var(--accent); font-weight: 900; }
.faq-list { display: grid; gap: 12px; }
details summary { cursor: pointer; font-weight: 900; color: var(--brand); }
details p { margin-top: 12px; }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.stars { color: var(--accent); letter-spacing: 2px; margin-bottom: 10px; }
.review-card span { color: var(--muted); font-size: 14px; }
.contact-panel { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.contact-panel.vertical { display: block; }
.cta-band { margin-top: 16px; margin-bottom: 64px; background: linear-gradient(135deg, var(--brand), #2b3448); color: white; }
.cta-band h2, .cta-band p { color: white; }
.page-hero { padding: 46px 0 24px; }
.breadcrumb { padding: 18px 0 0; font-size: 14px; color: var(--muted); display: flex; gap: 8px; flex-wrap: wrap; }
.breadcrumb a { color: var(--accent); font-weight: 800; }
.module-link { margin-top: 18px; color: var(--muted); }
.module-link a { color: var(--accent); font-weight: 900; }
.site-footer { background: #101828; color: rgba(255,255,255,.78); padding: 48px 0 22px; }
.site-footer h2, .site-footer .brand { color: white; }
.site-footer a { display: block; color: rgba(255,255,255,.78); margin: 6px 0; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr 1fr; gap: 30px; }
.footer-brand { margin-bottom: 12px; }
.copyright { border-top: 1px solid rgba(255,255,255,.12); margin-top: 26px; padding-top: 18px; font-size: 14px; color: rgba(255,255,255,.6); }
@media (max-width: 1080px) {
    .hero, .split { grid-template-columns: 1fr; }
    .video-grid, .card-grid { grid-template-columns: repeat(2, 1fr); }
    .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
    .topbar { align-items: flex-start; flex-direction: column; }
    .nav { justify-content: flex-start; }
    .search-form { border-radius: 20px; flex-direction: column; }
    .hero { padding-top: 34px; }
    .video-grid, .card-grid, .steps, .review-grid, .footer-grid { grid-template-columns: 1fr; }
    .contact-panel { align-items: flex-start; flex-direction: column; }
    h1 { font-size: 36px; }
}