:root{font-family:system-ui,"Microsoft YaHei",sans-serif;color:#19364a;background:#eff5f9;font-size:16px}*{box-sizing:border-box}body{margin:0}header{max-width:760px;margin:auto;display:flex;align-items:center;gap:12px;padding:24px 18px 18px}h1{font-size:23px;margin:0}header p{margin:5px 0 0;color:#657d8e;font-size:13px}.mark{background:#236b9c;color:white;border-radius:16px;padding:12px 15px;font-weight:800}#logout{margin-left:auto}main{max-width:760px;margin:auto;padding:0 16px}h2{font-size:18px;margin:0 0 16px}.card{background:white;border:1px solid #dce7ee;border-radius:20px;padding:22px;margin-bottom:16px;box-shadow:0 5px 20px #24496305}.notice{background:#fff3d9;color:#735219;border:1px solid #f0dcaa;padding:15px 18px;border-radius:15px;line-height:1.7;font-weight:650}.notice small{font-weight:400}.muted,small{color:#677e8f;font-size:13px;line-height:1.7}label{display:block;font-weight:600;font-size:14px;margin-bottom:18px}input,textarea{display:block;width:100%;margin-top:9px;border:1px solid #c8d8e3;border-radius:10px;background:#fbfdff;padding:12px;color:#19364a;font:inherit;font-weight:400;font-size:16px}textarea{resize:vertical}input:focus,textarea:focus{outline:2px solid #70b1de;outline-offset:1px}button{font:inherit;font-size:14px;border:1px solid #cddce7;border-radius:10px;padding:11px 15px;color:#235776;background:white;cursor:pointer}button:hover{background:#edf6fc}button:disabled{opacity:.55;cursor:not-allowed;background:#edf0f2;color:#667888}.primary{background:#236b9c;color:white;width:100%;font-weight:650;padding:14px}.primary:hover{background:#195b89}.primary:disabled{background:#8dabbf}nav{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}fieldset{border:0;padding:0;margin:0}legend{font-size:14px;margin-bottom:12px}.subjects{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.subjects .selected{background:#e2f1fc;border-color:#73acd1;color:#175c8c}.row{display:flex;align-items:center;justify-content:space-between;gap:8px}.tag{font-size:12px;color:#52758d;background:#edf5fa;padding:6px 10px;border-radius:20px}.upload{border:1px dashed #abc7da;padding:14px;border-radius:12px}.upload input{border:0;padding:0;font-size:13px}#previews{display:flex;flex-wrap:wrap;gap:8px}#previews img,.attachments img{width:76px;height:100px;object-fit:cover;border-radius:8px;border:1px solid #c9dde9}.preview{margin-bottom:14px}.preview button{display:block;padding:4px;font-size:12px;width:76px}.question{background:#e4f1fb;border:1px solid #c6e1f3;border-radius:16px;padding:18px;margin:20px 0 12px;white-space:pre-wrap;overflow-wrap:anywhere}.result{background:#f9fcff}.result h3{font-size:14px;color:#326886;margin:20px 0 9px}.result p{line-height:1.8;font-size:15px;margin:0;white-space:pre-wrap;overflow-wrap:anywhere}.reply{background:#eaf5ff;border-left:3px solid #3789bf;padding:14px;border-radius:8px}.mock-label{font-size:12px;color:#8b651e;margin-bottom:15px}.copy{margin-top:10px}.user{padding:16px 0;border-top:1px solid #e1eaf0;overflow-wrap:anywhere}.user button{margin:8px 5px 0 0}#historyList button{display:block;width:100%;text-align:left;margin:8px 0;overflow-wrap:anywhere}#status{color:#a13b20;font-size:14px;line-height:1.6;min-height:12px}footer{text-align:center;color:#8ba0af;font-size:12px;padding:20px}[hidden]{display:none!important}@media(max-width:400px){.card{padding:16px}main{padding:0 12px}header{padding:20px 14px}button{padding:10px 12px}}