:root{--bg:#f5f8fc;--ink:#172f48;--muted:#587087;--line:#d9e5f0;--blue:#1b6597;--cyan:#0b8799;--surface:#fff}
*{box-sizing:border-box}html{font-family:system-ui,-apple-system,"Microsoft YaHei","PingFang SC",sans-serif;background:var(--bg);color:var(--ink)}body{margin:0}
header{background:white;border-bottom:1px solid var(--line)}.top{max-width:1350px;margin:auto;padding:18px 25px;display:flex;justify-content:space-between;align-items:center;gap:15px}.brand{font-size:19px;font-weight:800;color:#184c77}.back{color:var(--blue);text-decoration:none;padding:9px 13px;border:1px solid var(--line);border-radius:9px;background:#f4f8fc;font-weight:600;font-size:13px}
main{max-width:1350px;margin:0 auto;padding:26px 25px 50px}h1{font-size:28px;margin:0 0 7px}h2{font-size:17px;margin:0 0 12px}.lead{font-size:14px;color:var(--muted);line-height:1.7;margin:0 0 22px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 335px;gap:20px;align-items:start}.stage,.panel,.info,.card{background:var(--surface);border:1px solid var(--line);border-radius:15px}.stage{padding:15px}.panel{padding:19px}.panel h2{padding-bottom:11px;border-bottom:1px solid var(--line)}.canvas-wrap{border:1px solid #d7e5f1;background:#f6f9fc;border-radius:10px;overflow:hidden}.canvas-wrap canvas{display:block;width:100%;height:auto;aspect-ratio:8/5}.tip{font-size:13px;line-height:1.65;color:var(--muted);margin-top:12px}.status{margin-top:14px;padding:10px 12px;background:#eff8fc;color:#1d6383;border-radius:9px;font-size:13px;line-height:1.6;min-height:43px}.panel label{display:block;font-size:13px;font-weight:650;color:#36576f;margin:11px 0 6px}.panel input,.panel select{width:100%;min-height:37px;padding:7px 9px;border:1px solid #ccdae8;border-radius:8px;background:#fff;color:#193a56;font-size:14px}.panel input[type=range]{padding:0}.two{display:grid;grid-template-columns:1fr 1fr;gap:10px}.buttons{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}button{background:#157c9a;color:white;border:0;border-radius:8px;padding:10px 14px;font-weight:650;cursor:pointer}button.alt{background:#e9f2f9;color:#285b7c;border:1px solid #cfdfea}.info{margin-top:18px;padding:17px 20px;font-size:14px;line-height:1.75}.info ul{margin:8px 0;padding-left:21px}.info code{background:#edf4f9;border-radius:4px;padding:1px 5px}.tag{display:inline-block;color:#086f8f;background:#e8f6fb;border-radius:8px;padding:4px 8px;font-size:12px;font-weight:700}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.card{display:block;text-decoration:none;padding:20px;color:inherit}.card:hover{border-color:#67a9c7;box-shadow:0 5px 18px #acc7d533}.card strong{display:block;font-size:19px;color:#1b6597;margin-bottom:8px}.card p{font-size:13px;line-height:1.6;color:var(--muted);margin:0}.notes{font-size:12px;color:var(--muted);margin-top:20px}.value{font-variant-numeric:tabular-nums;color:var(--cyan)}
@media(max-width:950px){.layout{grid-template-columns:1fr}.cards{grid-template-columns:1fr}}@media(max-width:600px){main{padding:18px 12px}.top{padding:12px}.two{grid-template-columns:1fr}h1{font-size:23px}}