:root{--brand:#E61E25;--brand-dark:#B30F14;--ink:#1c1c1e;--mut:#666;--line:#e6e6e6;--bg:#f7f7f8}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,PingFang SC,Microsoft YaHei,sans-serif;color:var(--ink);background:#fff}a{color:var(--brand);text-decoration:none}.nav{position:-webkit-sticky;position:sticky;top:0;z-index:30;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:18px;padding:10px 20px}.logo{font-weight:800;font-size:22px;color:var(--brand);letter-spacing:1px}.logo small{color:var(--ink);font-size:12px;font-weight:600;margin-left:4px}.nav a.nl{color:var(--ink);font-size:14px}.nav .sp{flex:1 1}.btn{display:inline-block;background:var(--brand);color:#fff;border:0;border-radius:8px;padding:9px 18px;font-size:14px;cursor:pointer}.btn:hover{background:var(--brand-dark)}.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--brand)}.btn.gray{background:#eee;color:var(--ink)}.btn:disabled{opacity:.5;cursor:not-allowed}.wrap{max-width:1020px;margin:0 auto;padding:24px 18px 60px}.card{border:1px solid var(--line);border-radius:12px;padding:18px;margin-bottom:14px;background:#fff}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));grid-gap:14px;gap:14px}input,select,textarea{width:100%;padding:9px 10px;border:1px solid #ccc;border-radius:8px;font-size:14px;margin:4px 0 12px;background:#fff}label{color:var(--mut)}label,table{font-size:13px}table{width:100%;border-collapse:collapse}td,th{border-bottom:1px solid var(--line);padding:7px 6px;text-align:left;vertical-align:top}.tag{display:inline-block;background:#fdecec;color:var(--brand-dark);border-radius:20px;padding:2px 10px;font-size:12px;margin-right:6px}.tag.gray{background:#eee;color:#555}.tag.green{background:#e6f6ec;color:#157347}.mut{color:var(--mut);font-size:13px}.err{background:#fdecec;color:var(--brand-dark)}.err,.ok{padding:10px 12px;border-radius:8px;margin-bottom:12px;font-size:14px}.ok{background:#e6f6ec;color:#157347}.foot{border-top:1px solid var(--line);color:var(--mut);font-size:12px;text-align:center;padding:18px}.opt{display:block;border:1px solid var(--line);border-radius:8px;padding:10px 12px;margin:6px 0;cursor:pointer;font-size:14px}.opt.sel{border-color:var(--brand);background:#fff5f5}.q{margin:18px 0}.q .prompt{font-weight:600;margin-bottom:6px}.passage,.q .prompt{white-space:pre-wrap}.passage{background:var(--bg);border-radius:10px;padding:14px;font-size:14px;line-height:1.75;max-height:420px;overflow:auto}.wm{position:fixed;inset:0;pointer-events:none;z-index:5;display:flex;flex-wrap:wrap;gap:90px;padding:60px;opacity:.07;font-size:15px;color:#000;transform:rotate(-12deg);transform-origin:center}.timer,.wm{font-weight:700}.timer{position:-webkit-sticky;position:sticky;top:52px;background:#fff5f5;border:1px solid #f3c2c4;border-radius:8px;padding:8px 12px;color:var(--brand-dark);z-index:10}.kw{border-left:3px solid var(--brand);padding:6px 12px;margin:8px 0;background:#fffafa}.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.tabs button{border:1px solid var(--line);background:#fff;border-radius:20px;padding:6px 14px;cursor:pointer}.tabs button.on{background:var(--brand);color:#fff;border-color:var(--brand)}