/* 红桃视频外部样式：极简高端、移动端优先 */
:root {
    --bg: #fbf7f4;
    --paper: #ffffff;
    --ink: #201b18;
    --muted: #776c65;
    --line: rgba(32, 27, 24, .1);
    --brand: #b51f32;
    --brand-dark: #7d1422;
    --soft: #f3ebe5;
    --shadow: 0 24px 70px rgba(32, 27, 24, .08);
    --radius: 28px;
    --container: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
    color: var(--ink);
    background: var(--bg);
    line-height: 1.75;
    text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; display: block; }
button, input, textarea { font: inherit; }
.container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
.skip-link { position: absolute; left: 12px; top: -60px; background: var(--ink); color: #fff; padding: 10px 14px; border-radius: 12px; z-index: 20; }
.skip-link:focus { top: 12px; }
.site-header { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(18px); background: rgba(251, 247, 244, .88); border-bottom: 1px solid var(--line); }
.header-shell { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding: 18px 0 12px; }
.brand-mark { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: .08em; }
.brand-mark img { border-radius: 14px; }
.site-nav { display: flex; align-items: center; gap: 18px; color: var(--muted); font-size: 14px; }
.site-nav a { padding: 8px 0; position: relative; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 3px; height: 1px; background: var(--brand); transform: scaleX(0); transform-origin: left; transition: transform .24s ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { transform: scaleX(1); }
.nav-toggle { display: none; border: 1px solid var(--line); background: var(--paper); border-radius: 999px; padding: 8px 16px; }
.search-shell { padding: 0 0 16px; }
.fake-search { display: grid; grid-template-columns: 180px 1fr auto; gap: 10px; align-items: center; background: rgba(255,255,255,.72); border: 1px solid var(--line); border-radius: 999px; padding: 8px 8px 8px 20px; box-shadow: 0 10px 30px rgba(32, 27, 24, .04); }
.fake-search label { font-size: 13px; color: var(--muted); }
.fake-search input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--ink); }
.fake-search button, .btn { border: 0; border-radius: 999px; padding: 12px 20px; cursor: pointer; transition: transform .24s ease, box-shadow .24s ease, background .24s ease; }
.fake-search button, .btn.primary { background: var(--brand); color: #fff; box-shadow: 0 12px 30px rgba(181, 31, 50, .2); }
.btn.ghost { border: 1px solid var(--line); background: rgba(255,255,255,.66); color: var(--ink); }
.fake-search button:hover, .btn:hover { transform: translateY(-2px); }
.search-note { margin: 8px 0 0 20px; color: var(--muted); font-size: 13px; }
.section { padding: 96px 0; }
.section-large { padding: 120px 0 104px; }
.soft-bg { background: linear-gradient(180deg, rgba(243,235,229,.7), rgba(251,247,244,.1)); }
.hero-grid, .page-hero-grid, .split, .contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, .85fr); gap: 64px; align-items: center; }
.eyebrow { margin: 0 0 14px; color: var(--brand); font-size: 13px; letter-spacing: .16em; text-transform: uppercase; font-weight: 800; }
h1, h2, h3 { line-height: 1.14; margin: 0; letter-spacing: -.03em; }
h1 { font-size: clamp(42px, 7vw, 82px); max-width: 840px; }
h2 { font-size: clamp(30px, 4vw, 52px); }
h3 { font-size: 22px; }
p { color: var(--muted); }
.hero-text { font-size: 18px; max-width: 720px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 34px 0; }
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 0; }
.hero-stats div, .stat-card, .feature-card, .review-card, .mini-card, .prose-card, .side-card, .video-card { background: rgba(255,255,255,.72); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.hero-stats div { padding: 20px; }
dt { color: var(--muted); font-size: 13px; }
dd { margin: 2px 0 0; font-weight: 900; font-size: 24px; }
.hero-media, .page-hero-grid figure { margin: 0; position: relative; }
.hero-media img, .page-hero-grid img { border-radius: 36px; box-shadow: var(--shadow); aspect-ratio: 1.28 / 1; object-fit: cover; }
figcaption { margin-top: 12px; color: var(--muted); font-size: 13px; }
.split { grid-template-columns: .8fr 1fr; }
.split p { font-size: 18px; margin: 0; }
.section-heading { text-align: center; margin-bottom: 42px; }
.section-heading.narrow { max-width: 760px; }
.section-heading p { max-width: 760px; margin: 16px auto 0; }
.card-grid { display: grid; gap: 20px; }
.card-grid.three { grid-template-columns: repeat(3, 1fr); }
.card-grid.four { grid-template-columns: repeat(4, 1fr); }
.feature-card, .mini-card { padding: 28px; min-height: 220px; }
.feature-card span { display: inline-flex; color: var(--brand); background: rgba(181,31,50,.08); border-radius: 999px; padding: 5px 12px; font-size: 12px; margin-bottom: 18px; }
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.video-card { overflow: hidden; transition: transform .24s ease, box-shadow .24s ease; }
.video-card:hover { transform: translateY(-6px); box-shadow: 0 34px 84px rgba(32,27,24,.12); }
.video-frame { position: relative; overflow: hidden; background: #120f0e; aspect-ratio: 16 / 10; }
.video-frame video { width: 100%; height: 100%; object-fit: cover; background-size: cover; }
.video-frame video[poster] { background: #120f0e; }
.play-button { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%) scale(.94); width: 72px; height: 72px; border: 1px solid rgba(255,255,255,.4); border-radius: 50%; background: rgba(255,255,255,.88); color: var(--brand-dark); opacity: 0; transition: opacity .22s ease, transform .22s ease; cursor: pointer; }
.video-card:hover .play-button, .video-card.is-ready .play-button, .play-button:focus-visible { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.duration { position: absolute; right: 14px; bottom: 14px; color: #fff; background: rgba(0,0,0,.42); border-radius: 999px; padding: 4px 10px; font-size: 12px; }
.video-body { padding: 22px; }
.category { color: var(--brand); font-weight: 800; font-size: 13px; margin: 0 0 8px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 18px 0; }
.tag-list li { border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; color: var(--muted); font-size: 12px; }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 0; padding-top: 16px; border-top: 1px solid var(--line); }
.metrics dd { font-size: 16px; }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.stat-card { padding: 34px; text-align: center; }
.stat-card strong { display: block; color: var(--brand); font-size: clamp(32px, 4vw, 54px); line-height: 1; }
.stat-card span { color: var(--muted); }
.review-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.review-card { padding: 24px; }
.review-card footer { display: grid; gap: 2px; margin-top: 22px; }
.review-card span { color: var(--muted); font-size: 13px; }
.faq-list { max-width: 860px; }
details { background: rgba(255,255,255,.72); border: 1px solid var(--line); border-radius: 20px; padding: 20px 24px; margin-bottom: 14px; }
summary { cursor: pointer; font-weight: 800; }
.contact-band { background: var(--ink); color: #fff; }
.contact-band p { color: rgba(255,255,255,.72); }
.contact-form { background: #fff; color: var(--ink); border-radius: 28px; padding: 28px; display: grid; gap: 16px; }
.contact-form label { display: grid; gap: 8px; color: var(--muted); }
.contact-form input, .contact-form textarea { border: 1px solid var(--line); border-radius: 16px; padding: 13px 14px; min-height: 48px; width: 100%; }
.contact-form textarea { min-height: 120px; resize: vertical; }
.site-footer { background: #171311; color: #fff; padding: 70px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr 1fr; gap: 44px; align-items: start; }
.site-footer p, .site-footer a { color: rgba(255,255,255,.72); }
.footer-links { display: grid; gap: 10px; }
.footer-contact h2 { font-size: 22px; }
.copyright { border-top: 1px solid rgba(255,255,255,.12); margin-top: 36px; padding-top: 20px; }
.page-hero { padding-top: 88px; }
.content-layout { display: grid; grid-template-columns: 1fr 340px; gap: 28px; align-items: start; }
.prose-card, .side-card { padding: 34px; }
.prose-card p, .prose-card li { color: var(--muted); font-size: 17px; }
.prose-card ul, .prose-card ol { padding-left: 22px; }
.domain-pill { display: inline-flex; padding: 9px 14px; background: var(--soft); border-radius: 999px; color: var(--brand-dark); font-weight: 800; }
.fade-in { animation: fadeUp .7s ease both; }
.delay-1 { animation-delay: .12s; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
@media (max-width: 1080px) {
    .hero-grid, .page-hero-grid, .split, .contact-grid, .content-layout { grid-template-columns: 1fr; }
    .card-grid.three, .video-grid { grid-template-columns: repeat(2, 1fr); }
    .review-grid, .stat-grid, .card-grid.four { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
    .container { width: min(100% - 28px, var(--container)); }
    .header-shell { flex-wrap: wrap; }
    .nav-toggle { display: inline-flex; }
    .site-nav { display: none; width: 100%; flex-direction: column; align-items: flex-start; padding: 10px 0; }
    .site-nav.is-open { display: flex; }
    .fake-search { grid-template-columns: 1fr; border-radius: 22px; padding: 16px; }
    .section, .section-large { padding: 68px 0; }
    h1 { font-size: clamp(36px, 11vw, 52px); }
    .hero-stats, .card-grid.three, .video-grid, .review-grid, .stat-grid, .card-grid.four, .footer-grid { grid-template-columns: 1fr; }
    .hero-media img, .page-hero-grid img { border-radius: 24px; }
    .metrics { grid-template-columns: 1fr 1fr; }
}