:root{--ink:#203b34;--green:#183d38;--muted:#5b7069;--line:#dbe3de}*{box-sizing:border-box}body{margin:0;background:#f1f3f0;color:var(--ink);font:18px/1.75 system-ui,"Microsoft YaHei",sans-serif}main{max-width:900px;margin:auto;padding:28px 24px 50px}h1{font-size:32px;line-height:1.4;margin:10px 0}h2{font-size:24px;margin:0 0 12px}h3{font-size:20px}p{margin:12px 0}.eyebrow,.hint,small{color:var(--muted);font-size:15px}nav{display:flex;gap:8px;position:sticky;top:0;background:#f1f3f0;padding:12px 0;z-index:2}button,input,select,textarea{font:inherit;color:inherit}button{border:1px solid #b7cac1;background:#fff;border-radius:10px;padding:11px 17px;cursor:pointer;min-height:48px}button:disabled{opacity:.55;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #829c47;outline-offset:3px}nav button{flex:1}.primary,nav button[aria-current=page]{background:var(--green);color:#fff;border-color:var(--green)}.card{background:#fff;border:1px solid var(--line);padding:24px;border-radius:16px;margin:16px 0}input:not([type=checkbox]),select,textarea{width:100%;padding:12px;border:1px solid #b7cac1;border-radius:9px;margin:6px 0 14px;background:#fbfcfa}textarea{min-height:110px;resize:vertical}input[type=checkbox]{width:21px;height:21px;vertical-align:middle;accent-color:var(--green)}label{display:block;margin:12px 0}.durations{display:flex;gap:12px;margin:20px 0}.durations button{flex:1;font-size:23px;background:#eaf0df}.durations small{display:block}.clock{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;font-variant-numeric:tabular-nums}.clock strong{font-size:23px}.question{white-space:pre-wrap;font-size:21px;line-height:1.9}.options{display:grid;gap:10px;margin:20px 0}.option{text-align:left;white-space:pre-wrap}.option[aria-pressed=true]{border:2px solid var(--green);background:#eaf0df}.correct{color:#226a35}.wrong{color:#a23838}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.row{border-bottom:1px solid var(--line);padding:14px 0}.row:last-child{border:0}.row strong{display:block}.badge{display:inline-block;border:1px solid #b7cac1;border-radius:99px;padding:3px 10px;font-size:15px;margin-right:6px}.reply{white-space:pre-wrap;background:#edf4e7;border-radius:10px;padding:16px}#notice{background:#fff1dc;border:1px solid #e4c88d;padding:12px 16px;border-radius:9px}#saveState{font-size:14px;color:var(--muted)}summary{cursor:pointer;font-weight:600}footer{text-align:center;color:var(--muted);font-size:15px;margin-top:32px}[hidden]{display:none!important}@media(max-width:600px){main{padding:18px 12px 36px}h1{font-size:27px}.card{padding:20px 17px}nav button{font-size:17px;padding:10px 6px}.durations{gap:7px}.durations button{padding:12px 8px;font-size:22px}.hint,small{font-size:16px}.question{font-size:20px}.actions button{flex:1}.clock strong{font-size:21px}}

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