:root{--bg:#f4f5f7;--card:#fff;--ink:#1c1f23;--muted:#6b7178;--line:#e2e4e8;--brand:#0f6b4f;--brand-soft:#e8f3ef;--bad:#b3261e}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-size:18px;line-height:1.6;-webkit-text-size-adjust:100%}
button{font:inherit;cursor:pointer}
.stage{height:100%;overflow:auto;padding:clamp(18px,4vh,44px) clamp(16px,4vw,56px) 70px}
.sheet{max-width:1040px;margin:0 auto}
.tag{font-size:15px;font-weight:600;color:var(--brand);margin-bottom:6px}
h1{font-size:clamp(26px,3.4vw,38px);line-height:1.3;margin:0 0 20px}
h2{font-size:18px;margin:0 0 8px;color:var(--muted);font-weight:600}
.card{background:var(--card);border-radius:14px;padding:clamp(16px,2.4vw,28px);box-shadow:0 1px 3px rgba(20,25,30,.06);margin-bottom:16px}
.question{font-size:clamp(26px,3.6vw,42px);line-height:1.32;font-weight:650}
.list{margin:0;padding-left:1.4em;font-size:clamp(19px,2vw,24px)}
.list li{margin-bottom:8px}
.play{border:1px solid var(--brand);color:var(--brand);background:#fff;border-radius:999px;padding:5px 16px;font-size:16px;white-space:nowrap}
.play:active{background:var(--brand-soft)}
.line{display:flex;gap:14px;align-items:center;justify-content:space-between;font-size:clamp(20px,2.4vw,28px);font-weight:600;padding:12px 0;border-bottom:1px solid var(--line)}
.line:last-child{border-bottom:0}
.form{display:grid;grid-template-columns:1fr 1fr;gap:12px 28px;font-size:clamp(17px,1.7vw,20px)}
.field{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.field b{font-weight:600}
input.ans,textarea.ans{font:inherit;border:0;border-bottom:2px solid #9aa1a8;background:#f8f9fa;padding:5px 8px;width:9em;border-radius:4px 4px 0 0;outline:none;color:var(--ink)}
input.ans:focus{border-color:var(--brand);background:#fff}
input.wide{width:100%}
.dict{display:grid;grid-template-columns:2em 1fr;gap:10px 8px;align-items:center}
.ok{color:var(--brand);font-weight:700}
.no{color:var(--bad);font-weight:700}
.key{color:var(--muted);font-size:15px}
.steps{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.step{padding:7px 14px;border-radius:999px;background:#eceef1;color:var(--muted);font-size:16px}
.step.on{background:var(--brand);color:#fff;font-weight:600}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.saybox{font-size:clamp(20px,2.2vw,27px);line-height:1.45;min-height:6.5em;white-space:pre-wrap;overflow-wrap:anywhere}
.saybox.after{border:2px solid var(--brand)}
.skel{display:grid;grid-template-columns:3.6em 1fr;gap:6px 12px;font-size:clamp(18px,2vw,23px)}
.skel b{color:var(--muted);font-weight:600}
.chunks{display:grid;grid-template-columns:1fr 1fr;gap:6px 22px;font-size:clamp(17px,1.8vw,21px)}
.chunks small{color:var(--muted);margin-left:8px;font-size:.78em}
.sent{display:flex;gap:12px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--line);font-size:clamp(19px,2.2vw,26px);line-height:1.4}
.sent:last-child{border-bottom:0}
.count{font-size:clamp(90px,17vw,190px);font-weight:700;text-align:center;line-height:1.1;font-variant-numeric:tabular-nums}
.count.end{color:var(--bad)}
table.data{width:100%;border-collapse:collapse;font-size:clamp(18px,2vw,23px)}
table.data th,table.data td{text-align:left;padding:11px 8px;border-bottom:1px solid var(--line)}
table.data th{color:var(--muted);font-weight:600;font-size:.82em}
.status{position:fixed;left:50%;transform:translateX(-50%);bottom:12px;background:#fff;border-radius:999px;padding:5px 15px;font-size:14px;color:var(--muted);box-shadow:0 2px 8px rgba(20,25,30,.12);z-index:5;white-space:nowrap}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#c28a1e;margin-right:7px;vertical-align:1px}
.dot.live{background:#23a26d}
.dot.off{background:var(--bad)}
.gate{position:fixed;inset:0;background:var(--bg);display:flex;align-items:center;justify-content:center;z-index:9;padding:20px}
.gate button{background:var(--brand);color:#fff;border:0;border-radius:10px;padding:14px 34px;font-size:21px;font-weight:600}
.audiobar{position:fixed;left:50%;transform:translateX(-50%);bottom:52px;z-index:6}
.audiobar button{background:var(--brand);color:#fff;border:0;border-radius:10px;padding:12px 26px;font-size:18px;font-weight:600;box-shadow:0 3px 12px rgba(20,25,30,.2)}
.muted{color:var(--muted)}
.goal p{font-size:clamp(20px,2.4vw,27px);line-height:1.5;margin:0;font-weight:600}
.question.small{font-size:clamp(20px,2.4vw,28px)}
.hint{font-family:ui-monospace,Consolas,monospace;font-size:1.05em;letter-spacing:.04em;min-width:9.5em;font-weight:600}
.stress{display:flex;align-items:center;gap:14px;padding:9px 0;border-bottom:1px solid var(--line);flex-wrap:wrap}
.stress:last-child{border-bottom:0}
.syll,.choices{display:flex;gap:6px;flex-wrap:wrap}
.syl{border:1px solid #c4c8cd;background:#fff;border-radius:8px;padding:6px 14px;font-size:clamp(17px,1.9vw,21px);color:var(--ink);min-height:44px;min-width:44px}
.syl.on{background:var(--brand);border-color:var(--brand);color:#fff}
.syl:disabled{cursor:default;opacity:1}
.line.small{font-size:clamp(18px,2vw,22px);padding:8px 0;font-weight:600}
.line.small small{font-weight:400;font-size:.72em;margin-left:6px}
.cloze{padding:9px 0;font-size:clamp(18px,2vw,22px)}
.pair{display:flex;gap:12px;margin-top:14px}
.play.big{font-size:19px;padding:9px 30px}
.skel-in{display:grid;grid-template-columns:3.6em 1fr;gap:12px;align-items:center;font-size:clamp(18px,2vw,22px)}
.skel-in b{color:var(--muted);font-weight:600}
input.ans::placeholder{color:#a8aeb5}
.goal{border-left:4px solid var(--brand)}
@media (max-width:720px){.form,.compare,.chunks{grid-template-columns:1fr}.line{flex-wrap:wrap}}