:root{--navy:#101d3b;--blue:#2a65e8;--light:#f4f7fc;--green:#12a36e;--red:#e75252}*{box-sizing:border-box}body{margin:0;background:var(--light);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;color:#18233b}main{max-width:900px;margin:0 auto;padding:42px 18px}.card{background:#fff;border-radius:18px;padding:32px;box-shadow:0 12px 34px #10204b14}.welcome{max-width:570px;margin:9vh auto}.eyebrow{font-size:12px;letter-spacing:1.4px;color:var(--blue);font-weight:700}h1{margin:8px 0 12px;font-size:30px}h2{margin-top:0}p{line-height:1.7;color:#526078}label{display:block;font-weight:650;margin:26px 0 14px}input{display:block;width:100%;border:1px solid #d4dbea;border-radius:10px;padding:14px;font-size:16px;margin-top:8px}button{border:0;border-radius:10px;background:var(--blue);color:white;padding:13px 22px;font-size:16px;font-weight:650;cursor:pointer}button:hover{filter:brightness(.94)}button.secondary{background:#eaf0ff;color:#2153c5}button:disabled{opacity:.55;cursor:wait}small{display:block;margin-top:16px;color:#77829a}.top{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px}.progress{font-weight:700;color:var(--blue)}.module-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}.tab{background:#eaf0ff;color:#3158b4;padding:8px 12px;border-radius:99px;font-size:14px;border:0}.tab.active{background:var(--navy);color:#fff}.question h2{font-size:20px;line-height:1.5}.qmeta{font-size:14px;color:#71809a;margin-bottom:12px}.options{display:grid;gap:10px}.option{border:1px solid #dfe5f0;border-radius:11px;padding:14px;cursor:pointer;display:flex;gap:11px;align-items:center}.option:has(input:checked){border-color:var(--blue);background:#f0f4ff}.option input{width:auto;margin:0}.actions{display:flex;justify-content:space-between;gap:10px;margin-top:28px}.summary{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.stat{border:1px solid #e3e9f3;border-radius:12px;padding:17px}.stat strong{font-size:24px;color:var(--blue)}.correct{color:var(--green)}.wrong{color:var(--red)}.mistake{border-top:1px solid #e2e8f2;padding:22px 0}.answer{padding:10px 12px;border-radius:8px;margin:8px 0}.your{background:#fff0f0;color:#9f3030}.right{background:#eafaf3;color:#16734f}.hidden{display:none}.notice{padding:12px 14px;background:#fff4df;color:#925d00;border-radius:10px;margin-bottom:15px}@media(max-width:560px){main{padding:22px 12px}.card{padding:22px}.summary{grid-template-columns:1fr}.top{align-items:flex-start;flex-direction:column}}