:root{
  --bg:#0b0b0a; --panel:#151513; --panel2:#1d1d1a; --line:#2a2925;
  --ink:#f3efe6; --ink2:#bdb7aa; --ink3:#868176;
  --ok:#3fb66b; --warn:#e0a526; --bad:#e0503f;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --mono:"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.6}
a{color:var(--ink)}
.mono{font-family:var(--mono)}
.muted{color:var(--ink3)}
.small{font-size:13px}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.btn{font:inherit;font-weight:600;border:0;border-radius:999px;padding:12px 24px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;white-space:nowrap}
.btn.primary{background:var(--ink);color:var(--bg)}
.btn.primary:hover{background:#fff}
.btn.primary:disabled{opacity:.5;cursor:default}
.btn.ghost{background:var(--panel2);color:var(--ink)}
.btn.ghost:hover{background:#262622}
.btn.small{padding:6px 16px;min-height:36px;font-size:14px}
.btn.wide{width:100%;margin-top:8px}

.nav{position:sticky;top:0;z-index:10;background:rgba(11,11,10,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;height:64px;gap:32px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;text-decoration:none;letter-spacing:.01em}
.mark{width:30px;height:30px;border-radius:8px;background:var(--ink);color:var(--bg);display:grid;place-items:center;font-weight:900;font-size:17px}
.links{display:flex;gap:24px;flex:1}
.links a{color:var(--ink2);text-decoration:none;font-size:15px}
.links a:hover{color:var(--ink)}
.auth{display:flex;align-items:center;gap:12px;font-size:14px}

.hero{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:56px;align-items:center;padding-top:88px;padding-bottom:88px}
.eyebrow{color:var(--ink3);font-size:14px;letter-spacing:.12em;margin:0 0 18px}
h1{font-size:64px;line-height:1.12;margin:0 0 24px;font-weight:900;letter-spacing:.01em}
.lead{font-size:19px;color:var(--ink2);max-width:520px;margin:0 0 32px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.fine{color:var(--ink3);font-size:13px;margin-top:16px}

.hero-card{background:var(--panel);border-radius:28px;padding:28px;display:flex;flex-direction:column;gap:16px}
.hc-top{display:flex;justify-content:space-between;font-size:12px}
.hc-state{background:var(--panel2);border-radius:14px;padding:14px 16px;font-size:14px}
.hc-block{display:flex;flex-direction:column;gap:8px}
.hc-row{display:flex;justify-content:space-between;align-items:baseline;font-size:13px}
.hc-row b{font-size:18px}
.bar{display:grid;grid-template-columns:96px minmax(0,1fr) 44px;gap:12px;align-items:center;font-size:13px;color:var(--ink2)}
.bar i{height:10px;background:var(--panel2);border-radius:5px;overflow:hidden;display:block}
.bar em{display:block;height:100%;background:var(--ink2);border-radius:5px;transition:width .8s cubic-bezier(.2,.8,.2,1)}
.bar em.ok{background:var(--ok)}
.bar span:last-child{text-align:right}
.conf{font-size:13px;color:var(--ink2)}
.conf b{color:var(--ink)}

.section{padding-top:72px;padding-bottom:24px}
h2{font-size:36px;margin:0 0 28px;font-weight:800}
h2.mt{margin-top:72px}
h3{font-size:19px;margin:0 0 10px}
.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.col{background:var(--panel);border-radius:24px;padding:28px 32px}
.col.strong{background:var(--ink);color:var(--bg)}
.col ul{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:10px}
.col:not(.strong) ul{color:var(--ink2)}
.grid3,.grid4{display:grid;gap:16px}
.grid3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid4{grid-template-columns:repeat(4,minmax(0,1fr))}
.tile{background:var(--panel);border-radius:24px;padding:26px 28px}
.tile p{color:var(--ink2);margin:0;font-size:15px}
.tag{display:inline-block;font-size:12px;background:var(--panel2);color:#8fb4ff;border-radius:8px;padding:3px 10px;margin-bottom:14px}
.rule{margin-top:16px;background:var(--panel);border-radius:24px;padding:28px 32px}
.lanes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:8px 0 14px}
.lane{background:var(--panel2);border-radius:16px;padding:16px 20px;display:flex;flex-direction:column;gap:4px;font-size:14px}
.lane b{font-size:18px}
.t-ok{color:var(--ok)}.t-warn{color:var(--warn)}.t-bad{color:var(--bad)}

.try-head{display:flex;justify-content:space-between;align-items:baseline;gap:16px}
.presets{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}
.preset{font:inherit;font-size:14px;border:0;border-radius:999px;padding:9px 18px;background:var(--panel2);color:var(--ink2);cursor:pointer;min-height:40px}
.preset.on{background:var(--ink);color:var(--bg);font-weight:600}
.play{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:16px;align-items:start}
.editor,.results{background:var(--panel);border-radius:24px;padding:24px}
.results{position:sticky;top:84px;min-height:300px}
.field{display:flex;flex-direction:column;gap:8px;font-size:14px;color:var(--ink2);margin-bottom:14px}
textarea,input,select{font:inherit;font-size:15px;color:var(--ink);background:var(--panel2);border:1px solid transparent;border-radius:14px;padding:12px 14px;width:100%;outline:none}
textarea:focus,input:focus,select:focus{border-color:#4a4943}
textarea{resize:vertical;line-height:1.6}
.qs-head{display:flex;justify-content:space-between;align-items:center;font-size:14px;color:var(--ink2);margin:6px 0 10px}
.q{background:var(--panel2);border-radius:18px;padding:16px;margin-bottom:12px;display:flex;flex-direction:column;gap:10px}
.q input,.q select,.q textarea{background:var(--bg)}
.q-top{display:grid;grid-template-columns:minmax(0,1fr) 150px 36px;gap:8px}
.q-x{font:inherit;border:0;background:transparent;color:var(--ink3);cursor:pointer;border-radius:10px;font-size:20px;min-height:36px}
.q-x:hover{color:var(--ink);background:var(--bg)}
.q-hint{font-size:12px;color:var(--ink3)}
.err{color:var(--bad);font-size:14px;min-height:1.2em;margin:10px 0 0}
.empty{display:grid;place-items:center;min-height:260px;font-size:15px}
.r-meta{display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--ink3);margin-bottom:16px}
.r-meta b{color:var(--ink);font-family:var(--mono);font-weight:600}
.r{background:var(--panel2);border-radius:18px;padding:16px 18px;margin-bottom:12px;display:flex;flex-direction:column;gap:8px}
.r-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.r-head b{font-size:18px}
.r .bar{grid-template-columns:120px minmax(0,1fr) 44px}
.r .bar i{background:var(--bg)}
.raw summary{cursor:pointer;color:var(--ink3);font-size:13px;margin-top:6px}
.raw pre{background:var(--bg);border-radius:14px;padding:14px;font-size:12px;overflow:auto;max-height:320px}
.contact{padding-bottom:72px}

.foot{border-top:1px solid var(--line);padding:28px 0 36px;font-size:14px}
.foot-in{display:flex;justify-content:space-between;align-items:flex-end;gap:24px}
.foot a{text-decoration:none}

.modal{border:0;border-radius:24px;padding:0;background:var(--panel);color:var(--ink);width:min(420px,calc(100vw - 32px))}
.modal::backdrop{background:rgba(0,0,0,.6)}
.modal-in{padding:28px}
.modal h3{font-size:22px;margin:0 0 4px}
.code-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:8px}

@media (max-width:900px){
  .hero{grid-template-columns:1fr;padding-top:48px;padding-bottom:48px;gap:36px}
  h1{font-size:44px}
  .compare,.grid3,.lanes,.play{grid-template-columns:1fr}
  .grid4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .results{position:static}
  .links{display:none}
  .nav-in{justify-content:space-between}
}
@media (max-width:520px){
  .wrap{padding:0 16px}
  h1{font-size:38px}
  h2{font-size:28px}
  .grid4{grid-template-columns:1fr}
  .q-top{grid-template-columns:minmax(0,1fr) 110px 36px}
  .foot-in{flex-direction:column;align-items:flex-start}
}