:root{
  --bg:#fbf8f2;
  --paper:#ffffff;
  --ink:#1e1b18;
  --muted:#716a61;
  --line:#e8dfd1;
  --soft:#f3eadc;
  --accent:#7a5732;
  --accent-dark:#4e351d;
  --radius:28px;
  --shadow:0 24px 70px rgba(58,43,27,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.72;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;height:auto}
button,input,select{font:inherit}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.site-header{position:sticky;top:0;z-index:20;background:rgba(251,248,242,.86);backdrop-filter:blur(24px);border-bottom:1px solid rgba(232,223,209,.8)}
.nav-wrap{max-width:1180px;margin:0 auto;padding:18px 24px 12px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand-mark,.footer-logo{display:inline-flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.03em}
.brand-mark img,.footer-logo img{border-radius:14px;box-shadow:0 10px 24px rgba(78,53,29,.12)}
.main-nav{display:flex;align-items:center;gap:4px;padding:7px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.6)}
.main-nav a{padding:9px 15px;border-radius:999px;color:var(--muted);font-size:14px;transition:background .2s ease,color .2s ease,transform .2s ease}
.main-nav a:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.nav-toggle{display:none;border:1px solid var(--line);background:var(--paper);border-radius:16px;padding:8px 12px}
.search-shell{max-width:1180px;margin:0 auto;padding:0 24px 18px}
.search-form{display:grid;grid-template-columns:1fr auto;gap:10px;max-width:760px;margin:0 auto}
.search-form input{width:100%;border:1px solid var(--line);background:rgba(255,255,255,.72);border-radius:999px;padding:13px 18px;outline:none;transition:border-color .2s ease,box-shadow .2s ease}
.search-form input:focus{border-color:var(--accent);box-shadow:0 0 0 4px rgba(122,87,50,.1)}
.search-form button,.share-row button{border:0;background:var(--ink);color:#fff;border-radius:999px;padding:12px 18px;cursor:pointer;transition:transform .2s ease,opacity .2s ease}
.search-form button:hover,.share-row button:hover{transform:translateY(-2px);opacity:.92}
.search-hint{margin:8px auto 0;max-width:760px;color:var(--muted);font-size:13px;min-height:22px}
.section-pad{max-width:1180px;margin:0 auto;padding:88px 24px}
.hero{display:grid;grid-template-columns:1.02fr .98fr;gap:58px;align-items:center;min-height:680px}
.eyebrow{margin:0 0 14px;color:var(--accent);font-size:13px;font-weight:800;letter-spacing:.18em;text-transform:uppercase}
h1,h2,h3{margin:0;color:var(--ink);line-height:1.16;letter-spacing:-.03em}
h1{font-size:clamp(42px,7vw,82px)}
h2{font-size:clamp(28px,4vw,48px)}
h3{font-size:20px}
p{margin:0;color:var(--muted)}
.lead{font-size:19px;max-width:660px;margin-top:24px;color:#534a40}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:34px 0 18px}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:13px 22px;font-weight:750;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
.btn:hover{transform:translateY(-2px)}
.btn.primary{background:var(--ink);color:#fff;box-shadow:0 16px 40px rgba(30,27,24,.14)}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--ink)}
.domain-note{font-size:14px;color:var(--muted)}
.hero-card{margin:0;position:relative;border-radius:var(--radius);padding:12px;background:linear-gradient(145deg,rgba(255,255,255,.9),rgba(243,234,220,.64));box-shadow:var(--shadow);border:1px solid rgba(232,223,209,.72);overflow:hidden}
.hero-card img{border-radius:22px;aspect-ratio:16/9;object-fit:cover}
.hero-card figcaption{padding:12px 4px 0;font-size:13px;color:var(--muted)}
.intro-panel{display:grid;grid-template-columns:.58fr 1fr;gap:52px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.intro-panel p:last-child{font-size:18px;color:#4c4339}
.section-head{display:grid;grid-template-columns:.7fr 1fr;gap:30px;align-items:end;margin-bottom:34px}
.section-head p:last-child{font-size:17px;max-width:620px}
.section-head.compact{display:block;margin-bottom:24px}
.video-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.video-card,.board-card,.review-card,.feature-strip article,.user-panel article,.rules-list article,.narrative article{background:rgba(255,255,255,.76);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 14px 40px rgba(58,43,27,.05);overflow:hidden;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.video-card:hover,.board-card:hover,.review-card:hover,.feature-strip article:hover,.user-panel article:hover,.rules-list article:hover,.narrative article:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#d8c7af}
.video-frame{position:relative;overflow:hidden;background:var(--soft);aspect-ratio:16/9}
.video-frame img{width:100%;height:100%;object-fit:cover;transition:transform .32s ease,filter .32s ease}
.video-card:hover .video-frame img{transform:scale(1.04);filter:saturate(1.06) contrast(1.02)}
.play-overlay{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.9);width:66px;height:66px;border-radius:50%;border:1px solid rgba(255,255,255,.8);background:rgba(30,27,24,.72);color:#fff;opacity:0;cursor:pointer;transition:opacity .2s ease,transform .2s ease;backdrop-filter:blur(12px)}
.video-card:hover .play-overlay,.video-card.is-active .play-overlay{opacity:1;transform:translate(-50%,-50%) scale(1)}
.video-body{padding:22px}
.tag,.tag-row span{display:inline-flex;align-items:center;border:1px solid var(--line);background:rgba(243,234,220,.58);border-radius:999px;padding:5px 10px;color:var(--accent-dark);font-size:12px;font-weight:750}
.video-body h3,.video-body h2{margin:14px 0 10px;font-size:20px;line-height:1.32;letter-spacing:-.02em}
.metrics{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px;color:var(--muted);font-size:13px}
.metrics span{padding:5px 9px;border-radius:999px;background:rgba(30,27,24,.05)}
.board-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.board-grid.wide{grid-template-columns:repeat(2,minmax(0,1fr))}
.board-card{padding:26px}
.board-card .count{font-size:13px;color:var(--accent);font-weight:800;margin-bottom:16px}
.board-card p{margin-top:12px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.stats-band{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.stats-grid div{padding:28px;border:1px solid var(--line);border-radius:24px;background:rgba(255,255,255,.62)}
.stats-grid strong{display:block;font-size:34px;line-height:1.1;letter-spacing:-.03em}
.stats-grid span{display:block;color:var(--muted);margin-top:10px}
.review-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.review-card{padding:24px}
.review-card p{color:#453c33;font-size:16px}
.review-card h3{margin-top:22px;font-size:17px}
.review-card span{color:var(--muted);font-size:13px}
.faq-list{display:grid;gap:12px;max-width:900px;margin:0 auto}
details{background:rgba(255,255,255,.8);border:1px solid var(--line);border-radius:22px;padding:20px 22px;box-shadow:0 12px 30px rgba(58,43,27,.04)}
summary{cursor:pointer;font-weight:800;color:var(--ink);list-style:none}
summary::-webkit-details-marker{display:none}
details p{margin-top:12px}
.join-panel{background:linear-gradient(135deg,rgba(255,255,255,.78),rgba(243,234,220,.72));border:1px solid var(--line);border-radius:36px;box-shadow:var(--shadow);margin-bottom:88px}
.join-panel h2,.join-panel p{max-width:820px}
.join-form{display:grid;grid-template-columns:1fr 1fr auto;gap:14px;align-items:end;margin-top:28px}
.join-form label{display:grid;gap:7px;color:var(--muted);font-size:13px;font-weight:750}
.join-form input,.join-form select{border:1px solid var(--line);border-radius:18px;background:#fff;padding:13px 14px;outline:none}
.join-form p{grid-column:1/-1;min-height:24px;font-size:14px;color:var(--accent-dark)}
.page-hero{padding-top:96px;padding-bottom:54px;text-align:center}
.page-hero h1{max-width:900px;margin:0 auto;font-size:clamp(38px,6vw,70px)}
.page-hero p:last-child{max-width:760px;margin:24px auto 0;font-size:18px}
.topic-list,.rank-list,.timeline{display:grid;gap:16px}
.topic-row,.rank-row,.timeline article{display:grid;grid-template-columns:220px 1fr;gap:24px;align-items:center;background:rgba(255,255,255,.72);border:1px solid var(--line);border-radius:28px;padding:18px;box-shadow:0 12px 34px rgba(58,43,27,.05)}
.topic-row img{border-radius:20px;aspect-ratio:16/9;object-fit:cover}
.topic-row h2,.rank-row h2,.timeline h2{font-size:23px;margin:10px 0}
.rank-row{grid-template-columns:72px 1fr auto}
.rank-row>strong{font-size:34px;color:var(--accent);letter-spacing:-.05em}
.feature-strip,.user-panel,.rules-list,.narrative{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.feature-strip article,.user-panel article,.rules-list article,.narrative article{padding:28px}
.feature-strip h2,.user-panel h2,.rules-list h2,.narrative h2{font-size:24px;margin:12px 0}
.rules-list article strong{color:var(--accent);font-size:28px}
.narrative{grid-template-columns:1fr;max-width:920px}
.site-footer{background:#171411;color:#fff;margin-top:0}
.footer-grid{max-width:1180px;margin:0 auto;padding:58px 24px;display:grid;grid-template-columns:1.2fr .7fr .7fr .8fr;gap:36px}
.site-footer p,.site-footer a,.site-footer span{color:rgba(255,255,255,.7)}
.site-footer h2{font-size:16px;color:#fff;margin-bottom:14px}
.site-footer a{display:block;margin:8px 0;transition:color .2s ease}
.site-footer a:hover{color:#fff}
.footer-logo{color:#fff;margin-bottom:16px}
.share-row{display:flex;gap:8px;flex-wrap:wrap}
.share-row button{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.14);padding:8px 12px}
.tiny{font-size:12px;margin-top:12px}
@media (max-width:960px){
  .hero,.intro-panel,.section-head{grid-template-columns:1fr;gap:28px}.hero{min-height:auto;padding-top:56px}.video-grid,.board-grid,.review-grid,.stats-grid,.feature-strip,.user-panel,.rules-list{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.join-form{grid-template-columns:1fr}.rank-row{grid-template-columns:50px 1fr}.rank-row .metrics{grid-column:2}.topic-row{grid-template-columns:160px 1fr}
}
@media (max-width:720px){
  .nav-wrap{padding:14px 16px 10px}.nav-toggle{display:block}.main-nav{display:none;position:absolute;left:16px;right:16px;top:70px;border-radius:24px;flex-direction:column;align-items:stretch;background:rgba(255,255,255,.96);box-shadow:var(--shadow);padding:12px}.main-nav.is-open{display:flex}.main-nav a{padding:12px 16px}.search-shell{padding:0 16px 14px}.search-form{grid-template-columns:1fr}.section-pad{padding:58px 16px}h1{font-size:40px}.video-grid,.board-grid,.board-grid.wide,.review-grid,.stats-grid,.feature-strip,.user-panel,.rules-list{grid-template-columns:1fr}.topic-row,.rank-row,.timeline article{grid-template-columns:1fr}.topic-row img{width:100%}.footer-grid{grid-template-columns:1fr;padding:44px 16px}.join-panel{border-radius:26px;margin-bottom:58px}.page-hero{text-align:left}.page-hero h1,.page-hero p:last-child{margin-left:0;margin-right:0}
}