:root{--bg:#f4f5f7;--surface:#fff;--border:#e2e5ea;--text:#1a1d24;--text-muted:#667085;--primary:#2563eb;--primary-hover:#1d4ed8;--danger:#dc2626;--radius:10px}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:-apple-system,Segoe UI,PingFang TC,Noto Sans TC,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.6}.page{max-width:640px;margin:0 auto;padding:20px 16px 80px;min-height:100vh}.brand-bar{display:flex;align-items:center;gap:8px;font-weight:700;font-size:15px;color:var(--text);padding:6px 0 18px}.brand-bar span{color:var(--text-muted);font-weight:400;font-size:12px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;margin-bottom:16px}h1{font-size:19px;margin:0 0 6px}h2{font-size:15px}h2,p{margin:0 0 10px}.muted{color:var(--text-muted);font-size:13px}.doc-preview{border:1px solid var(--border);border-radius:8px;padding:16px;background:#fff;font-size:14px;line-height:1.7;max-height:55vh;overflow-y:auto}.doc-preview table{width:100%;border-collapse:collapse;margin:8px 0}.doc-preview td{border-bottom:1px solid #eee;padding:6px 4px;vertical-align:top}label{display:block;font-size:13px;font-weight:600;color:var(--text-muted);margin-bottom:5px}input,select,textarea{font:inherit;width:100%;padding:11px 12px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--text);margin-bottom:14px}input:focus,textarea:focus{outline:2px solid var(--primary);outline-offset:-1px}.checkbox-row{display:flex;align-items:flex-start;gap:10px;margin-bottom:14px;font-size:13.5px}.checkbox-row input{width:auto;margin:3px 0 0;flex-shrink:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;width:100%;padding:13px 16px;border-radius:8px;border:1px solid var(--primary);background:var(--primary);color:#fff;font-size:15px;font-weight:600;cursor:pointer}.btn:disabled{opacity:.5;cursor:not-allowed}.btn:not(:disabled):hover{background:var(--primary-hover)}.btn-secondary{background:#fff;color:var(--text);border-color:var(--border)}.error-text{color:var(--danger);font-size:13px;margin:-6px 0 12px}.alert{padding:12px 14px;border-radius:8px;font-size:13.5px;margin-bottom:16px}.alert-info{background:#e8f0fe;color:#1a4ea8}.alert-error{background:#fce4e4;color:#9c1c1c}.alert-success{background:#e2f6e8;color:#157a3c}.signature-pad{border:1px dashed var(--border);border-radius:8px;background:#fff;touch-action:none;width:100%;display:block}.step-indicator{display:flex;gap:6px;margin-bottom:18px}.step-indicator .dot{flex:1 1;height:4px;border-radius:2px;background:var(--border)}.step-indicator .dot.active{background:var(--primary)}.status-icon{font-size:40px;margin-bottom:10px}.center,.status-icon{text-align:center}.kv{font-size:13px;color:var(--text-muted)}