:root{--primary: #1890ff;--primary-active: #096dd9;--primary-light: #e6f7ff;--success: #52c41a;--danger: #ff4d4f;--text-main: #1f2937;--text-muted: #6b7280;--border: #e5e7eb}.container{max-width:600px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column;background-color:#fff}.header{position:sticky;top:0;background:#fff;z-index:100;padding:12px 16px;border-bottom:1px solid var(--border);box-shadow:0 1px 3px #0000000d}.progress-bar-bg{width:100%;height:8px;background:#f0f2f5;border-radius:4px;overflow:hidden;margin-top:8px}.progress-bar-fill{height:100%;background:linear-gradient(90deg,#1890ff,#52c41a);transition:width .3s ease}.card{padding:20px 16px;border-bottom:1px solid #f0f0f0}.question-title{font-size:18px;font-weight:600;color:var(--text-main);margin-bottom:12px;line-height:1.5}.question-title .required-star{color:var(--danger);margin-right:4px}.option-item{display:flex;align-items:center;padding:14px 16px;margin-bottom:10px;border:1.5px solid var(--border);border-radius:10px;font-size:17px;cursor:pointer;transition:all .15s ease;background:#fafafa}.option-item:active{transform:scale(.99)}.option-item.selected{border-color:var(--primary);background-color:var(--primary-light);color:var(--primary-active);font-weight:600}.input-box{width:100%;padding:14px 16px;font-size:17px;border:1.5px solid var(--border);border-radius:8px;outline:none;background:#fff;transition:border-color .2s}.input-box:focus{border-color:var(--primary)}.btn-primary{width:100%;height:52px;background:var(--primary);color:#fff;border:none;border-radius:8px;font-size:18px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:background .2s}.btn-primary:active{background:var(--primary-active)}.btn-outline{width:100%;height:50px;background:#fff;color:var(--text-main);border:1.5px solid var(--border);border-radius:8px;font-size:17px;cursor:pointer}.btn-outline:active{background:#f5f5f5}.save-status-badge{font-size:13px;display:flex;align-items:center;gap:4px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.animate-spin{animation:spin 1s linear infinite}