:root{font:16px/1.7 'Microsoft YaHei',sans-serif;color:#183d42;background:#f3f6f4}*{box-sizing:border-box}body{margin:0}header{background:#fff;border-bottom:1px solid #d9e5df;display:flex;justify-content:space-between;align-items:center;padding:18px max(5vw,20px);gap:16px}header b{font-size:25px;letter-spacing:4px;margin-right:20px}header span{color:#617676}nav{display:flex;gap:8px}button,input,select,textarea{font:inherit}button{cursor:pointer;border:1px solid #bdd3c9;background:#fff;color:#185345;padding:9px 16px;border-radius:8px}button:hover{background:#e6f2ec}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #bd8529;outline-offset:2px}button:disabled{opacity:.55;cursor:default}main{max-width:1150px;margin:40px auto;padding:0 24px}.intro{margin-bottom:30px}.eyebrow{color:#317364;letter-spacing:2px;font-size:14px}h1{font-size:34px;margin:8px 0}h2{font-size:24px;margin:4px 0 18px}h3{margin:10px 0}p{margin:8px 0}aside{background:#e9efe9;border-left:3px solid #528774;padding:12px 18px;margin-top:20px;font-size:14px;color:#4e6260}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card,.question{background:white;border:1px solid #dce5df;border-radius:14px;padding:24px}.card .number{color:#708d7f;font-size:14px}.muted{color:#637a76;font-size:14px}.bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:18px 0}.primary{background:#1c6651;color:#fff;border-color:#1c6651}.primary:hover{background:#134936;color:#fff}.stem,pre,.answer{white-space:pre-wrap;overflow-wrap:anywhere;font-family:inherit}.stem{font-size:20px;margin:22px 0}label.option{display:flex;align-items:flex-start;gap:12px;padding:12px;border:1px solid #d9e4de;border-radius:8px;margin:10px 0}input[type=radio],input[type=checkbox]{margin-top:8px;accent-color:#1c6651}textarea,input[type=text]{display:block;width:100%;padding:12px;border:1px solid #b9ccc1;border-radius:8px;margin:10px 0}textarea{min-height:120px}select{padding:8px;max-width:100%;border:1px solid #b9ccc1;border-radius:8px;background:#fff}.result{border-top:1px solid #d9e5df;padding-top:20px;margin-top:20px}.correct{color:#1b7250}.incorrect{color:#af413b}details{background:#fff;padding:16px 20px;border:1px solid #dce5df;border-radius:10px;margin:12px 0}summary{cursor:pointer}.empty{padding:36px;background:white;border-radius:12px}footer{text-align:center;padding:25px;color:#687e78;font-size:14px}#notice:not(:empty){background:#fff1d8;padding:12px;margin-bottom:20px}@media(max-width:760px){header{align-items:flex-start;flex-direction:column}.grid{grid-template-columns:1fr}main{margin-top:24px;padding:0 16px}h1{font-size:27px}.question{padding:18px}nav button{padding:8px 12px}}

input:not([type=radio]):not([type=checkbox]){display:block;width:100%;padding:12px;border:1px solid #b9ccc1;border-radius:8px;margin:10px 0}header{flex-wrap:wrap}nav{flex-wrap:wrap}.auth{max-width:550px;margin:0 auto}.auth label{display:block;margin:12px 0}.card{margin-bottom:14px}.auth select{display:block;width:100%}fieldset:disabled{opacity:.8}