:root{--bg:#f7f8fb;--surface:#fff;--ink:#14161c;--ink-2:#4a5060;--ink-3:#79808f;
--line:#e6e9f0;--brand:#4f46e5;--brand-soft:#eef0ff;--accent:#0d9488;--accent-soft:#e6f7f4;
--warn:#b45309;--radius:14px;--shadow:0 1px 2px rgba(20,22,28,.05),0 8px 24px rgba(20,22,28,.06)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px}

/* header */
.site-head{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.head-in{display:flex;align-items:center;gap:18px;height:62px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:17px;letter-spacing:-.2px}
.logo .dot{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,#4f46e5,#0d9488);display:grid;place-items:center;color:#fff;font-size:14px;font-weight:700}
.nav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.nav a{padding:7px 11px;border-radius:9px;font-size:13.5px;color:var(--ink-2);font-weight:500}
.nav a:hover{background:var(--brand-soft);color:var(--brand)}
.nav a.on{background:var(--brand-soft);color:var(--brand)}

/* hero */
.hero{padding:52px 0 34px;background:linear-gradient(180deg,#fff,rgba(247,248,251,0))}
.hero h1{font-size:clamp(28px,4.4vw,44px);line-height:1.2;margin:0 0 14px;letter-spacing:-.8px;font-weight:800}
.hero h1 em{font-style:normal;background:linear-gradient(135deg,#4f46e5,#0d9488);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:16.5px;color:var(--ink-2);margin:0 0 22px;max-width:700px}
.search{display:flex;gap:10px;max-width:660px}
.search input{flex:1;padding:13px 16px;border:1px solid var(--line);border-radius:12px;font-size:15px;background:#fff;color:var(--ink);outline:none;box-shadow:0 1px 2px rgba(20,22,28,.04)}
.search input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.search button{padding:13px 22px;border:0;border-radius:12px;background:var(--brand);color:#fff;font-size:15px;font-weight:600;cursor:pointer}
.stats{display:flex;gap:30px;flex-wrap:wrap;margin-top:26px}
.stat b{display:block;font-size:26px;font-weight:800;letter-spacing:-.5px}
.stat span{font-size:13px;color:var(--ink-3)}

/* sections */
section{padding:38px 0 6px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.sec-head h2{font-size:22px;margin:0;letter-spacing:-.3px;font-weight:750}
.sec-head p{margin:4px 0 0;font-size:14px;color:var(--ink-3)}
.more{font-size:13.5px;color:var(--brand);font-weight:600}

/* filter bar */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 22px}
.filters a{padding:6px 13px;border:1px solid var(--line);background:#fff;border-radius:999px;font-size:13px;color:var(--ink-2)}
.filters a:hover{border-color:var(--brand);color:var(--brand)}
.filters a.on{background:var(--brand);border-color:var(--brand);color:#fff}

/* lang grid */
.lang-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:12px}
.lang-card{display:block;padding:16px 15px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);transition:.16s}
.lang-card:hover{border-color:var(--brand);box-shadow:var(--shadow);transform:translateY(-2px)}
.lang-card .lg-top{display:flex;align-items:center;gap:9px;margin-bottom:6px}
.badge-lang{width:30px;height:30px;border-radius:9px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:11.5px;font-weight:800;letter-spacing:-.2px}
.lang-card b{font-size:14px;font-weight:700;white-space:nowrap}
.lang-card .nat{font-size:11px;color:var(--ink-3);margin-left:auto;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:45%}
.lang-card p{margin:6px 0 0;font-size:12.5px;color:var(--ink-3)}

/* platform cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(288px,1fr));gap:14px}
.card{position:relative;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 17px 15px;transition:.16s}
.card:hover{border-color:#cdd2e4;box-shadow:var(--shadow);transform:translateY(-2px)}
.card .top{display:flex;align-items:center;gap:11px;margin-bottom:9px}
.mark{width:36px;height:36px;flex:0 0 36px;border-radius:10px;display:grid;place-items:center;font-weight:800;font-size:13px;color:#fff;letter-spacing:-.3px}
.card h3{margin:0;font-size:16px;font-weight:700;letter-spacing:-.2px;line-height:1.35}
.card .host{font-size:12px;color:var(--ink-3);margin-top:1px;word-break:break-all}
.card p{margin:0 0 11px;font-size:13.4px;color:var(--ink-2);flex:1;
display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.tags{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:11px}
.tag{font-size:11.5px;padding:2.5px 8px;border-radius:6px;background:#f1f3f8;color:var(--ink-2)}
.tag.cat{background:var(--accent-soft);color:#0f766e}
.card .go{display:flex;align-items:center;justify-content:space-between;font-size:13.5px;color:var(--brand);font-weight:650}
.card .go span{opacity:.7;font-weight:500;color:var(--ink-3)}
.card:hover .go span{opacity:1}
.fee-line{font-size:12px;color:var(--ink-3);margin:-4px 0 10px}

/* detail */
.crumb{font-size:12.5px;color:var(--ink-3);padding:16px 0 0}
.crumb a:hover{color:var(--brand)}
.detail{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:26px;margin:14px 0 0}
.detail h1{margin:0 0 6px;font-size:27px;letter-spacing:-.5px;font-weight:800}
.detail .sub{color:var(--ink-3);font-size:13.5px;margin-bottom:16px}
.kv{display:grid;grid-template-columns:112px 1fr;gap:9px 14px;font-size:14px;margin:16px 0 0}
.kv dt{color:var(--ink-3);font-size:13px}
.kv dd{margin:0;color:var(--ink)}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.btn{display:inline-block;padding:11px 20px;border-radius:11px;background:var(--brand);color:#fff;font-weight:650;font-size:14.5px}
.btn.ghost{background:#fff;border:1px solid var(--line);color:var(--ink)}
.btn:hover{opacity:.9}
.note{background:#fffbeb;border:1px solid #fde68a;border-radius:11px;padding:12px 14px;font-size:13.4px;color:#78350f;margin-top:18px}
/* back to top */
.totop{position:fixed;right:18px;bottom:24px;width:44px;height:44px;border-radius:50%;
border:1px solid var(--line);background:var(--surface);color:var(--ink);box-shadow:var(--shadow);
font:inherit;font-size:19px;line-height:1;cursor:pointer;z-index:60;
display:none;align-items:center;justify-content:center;
transition:background .18s,color .18s,border-color .18s,transform .18s}
.totop.show{display:flex}
.totop:hover{background:var(--brand);color:#fff;border-color:var(--brand);transform:translateY(-2px)}
.totop:active{transform:translateY(0)}
.totop svg{display:block}
@media(max-width:720px){.totop{right:12px;bottom:14px;width:40px;height:40px;font-size:17px}}

/* misc */
.foot{margin-top:48px;border-top:1px solid var(--line);background:#fff;padding:30px 0 40px;font-size:13px;color:var(--ink-3)}
.foot-in{display:flex;gap:24px;flex-wrap:wrap;justify-content:space-between}
.foot a:hover{color:var(--brand)}
.prose{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:24px 26px;font-size:14.5px;color:var(--ink-2)}
.prose h2{font-size:19px;color:var(--ink);margin:22px 0 8px;font-weight:750}
.prose h2:first-child{margin-top:0}
.prose ul{padding-left:20px;margin:8px 0}
.prose li{margin:5px 0}
.empty{padding:40px;text-align:center;color:var(--ink-3);background:var(--surface);border:1px dashed var(--line);border-radius:14px}
.srch-tip{font-size:13px;color:var(--ink-3);margin-top:10px}
@media(max-width:720px){
  .hero{padding:34px 0 24px}
  .nav{display:none}
  .kv{grid-template-columns:1fr}
  .kv dt{margin-top:6px}
  .stats{gap:18px}
}