:root{--primary: #2F9E63;--primary-dark: #23784B;--orange: #F28C28;--bg: #f5f7f6;--card: #ffffff;--text: #2b2f2e;--muted: #7a8280;--danger: #d64545;--line: #e5eae8}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body{height:100%}body{font-family:PingFang SC,Microsoft YaHei,system-ui,sans-serif;background:var(--bg);color:var(--text);font-size:15px}#app{min-height:100%}button{border:none;outline:none;cursor:pointer;font-family:inherit;font-size:15px}input,textarea,select{font-family:inherit;font-size:15px;border:1px solid var(--line);border-radius:8px;padding:10px 12px;outline:none;background:#fff;color:var(--text);width:100%}input:focus,textarea:focus,select:focus{border-color:var(--primary)}textarea{resize:vertical;min-height:80px}.btn{display:inline-flex;align-items:center;justify-content:center;background:var(--primary);color:#fff;border-radius:8px;padding:11px 22px;font-weight:600;transition:opacity 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.desc{font-size:12px;color:var(--muted);margin-top:4px}.qcard{background:var(--card);border-radius:12px;padding:16px;margin-bottom:12px}.q-stem{font-size:16px;line-height:1.6;white-space:pre-wrap;word-break:break-word}.q-type{font-size:12px;color:var(--primary-dark);font-weight:600;margin-bottom:6px}.opt-item{display:flex;align-items:flex-start;gap:10px;padding:11px 12px;border:1px solid var(--line);border-radius:10px;margin-top:10px;cursor:pointer;transition:all .12s}.opt-item.active{border-color:var(--primary);background:#eaf7f0}.opt-key{width:26px;height:26px;border-radius:50%;flex-shrink:0;background:#f0f2f1;color:var(--text);font-size:13px;font-weight:600;display:flex;align-items:center;justify-content:center}.opt-item.active .opt-key{background:var(--primary);color:#fff}.footbar{position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--line);padding:10px 16px calc(10px + env(safe-area-inset-bottom));display:flex;gap:10px;z-index:40}.footbar 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