* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
        }
        
        body {
            background-color: #f5f5f5;
            color: #333;
            line-height: 1.6;
            padding-bottom: 70px; /* 为底部导航留出空间 */
        }
        
        .container {
            max-width: 100%;
            padding: 0 15px;
        }
        
        /* 顶部导航 */
        .app-header {
            position: sticky;
            top: 0;
            background: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            z-index: 100;
            padding: 15px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .app-title {
            font-size: 1.2rem;
            font-weight: 600;
            color: #333;
        }
        
        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            object-fit: cover;
        }
        
        /* 用户信息卡片 */
        .user-card {
            background: white;
            border-radius: 12px;
            padding: 20px;
            margin: 15px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }
        
        .user-info {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
        }
        
        .avatar-placeholder {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            font-weight: bold;
            margin-right: 15px;
        }
        
        .user-details {
            flex: 1;
        }
        
        .user-name {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 5px;
        }
        
        .user-meta {
            font-size: 0.9rem;
            color: #666;
        }
        
        .credit-score {
            text-align: center;
        }
        
        .credit-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: #667eea;
        }
        
        .credit-label {
            font-size: 0.8rem;
            color: #666;
        }
        
        .status-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        
        .tag {
            background: #f0f0f0;
            padding: 4px 10px;
            border-radius: 12px;
            font-size: 0.8rem;
            color: #666;
        }
        
        /* 导航菜单 */
        .nav-tabs {
            display: flex;
            overflow-x: auto;
            background: white;
            padding: 0 15px;
            border-bottom: 1px solid #eee;
            white-space: nowrap;
            -webkit-overflow-scrolling: touch;
        }
        
        .nav-tab {
            padding: 12px 15px;
            font-size: 0.9rem;
            color: #666;
            text-decoration: none;
            border-bottom: 2px solid transparent;
            transition: all 0.3s;
        }
        
        .nav-tab.active {
            color: #667eea;
            border-bottom-color: #667eea;
            font-weight: 500;
        }
        
        /* 内容区域 */
        .content-section {
            display: none;
            background: white;
            border-radius: 12px;
            padding: 20px;
            margin: 15px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }
        
        .content-section.active {
            display: block;
        }
        
        .section-title {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: #333;
        }
        
        /* 表单样式 */
        .form-group {
            margin-bottom: 15px;
        }
        
        .form-label {
            display: block;
            margin-bottom: 5px;
            font-weight: 500;
            color: #333;
        }
        
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            font-size: 1rem;
        }
        
        .form-control:read-only {
            background: #f8f9fa;
            color: #666;
        }
        
        textarea.form-control {
            resize: vertical;
            min-height: 100px;
        }
        
        .btn {
            background: #667eea;
            color: white;
            padding: 12px 20px;
            border: none;
            border-radius: 8px;
            font-weight: 500;
            cursor: pointer;
            font-size: 1rem;
            width: 100%;
            transition: background 0.3s;
        }
        
        .btn:hover {
            background: #5a6fd8;
        }
        
        /* 活动列表 */
        .activity-item {
            border-bottom: 1px solid #f0f0f0;
            padding: 15px 0;
        }
        
        .activity-item:last-child {
            border-bottom: none;
        }
        
        .activity-link {
            text-decoration: none;
            color: inherit;
            display: block;
        }
        
        .activity-title {
            font-size: 1rem;
            font-weight: 500;
            margin-bottom: 8px;
            color: #333;
        }
        
        .activity-meta {
            display: flex;
            gap: 10px;
            color: #666;
            font-size: 0.85rem;
            margin-bottom: 8px;
        }
        
        .activity-status {
            display: inline-block;
            padding: 4px 8px;
            border-radius: 12px;
            font-size: 0.75rem;
        }
        
        .status-approved {
            background: #d4edda;
            color: #155724;
        }
        
        .status-pending {
            background: #fff3cd;
            color: #856404;
        }
        
        .status-rejected {
            background: #f8d7da;
            color: #721c24;
        }
        
        .status-cancelled {
            background: #f8f9fa;
            color: #666;
        }
        
        /* 信用记录 */
        .credit-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid #f0f0f0;
        }
        
        .credit-item:last-child {
            border-bottom: none;
        }
        
        .credit-description {
            font-weight: 500;
            margin-bottom: 4px;
        }
        
        .credit-time {
            color: #666;
            font-size: 0.85rem;
        }
        
        .credit-change {
            font-weight: bold;
            text-align: right;
        }
        
        .positive {
            color: #28a745;
        }
        
        .negative {
            color: #dc3545;
        }
        
        .credit-current {
            color: #666;
            font-size: 0.85rem;
        }
        
        /* 关注的活动 */
        .followed-activity-item {
            display: flex;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid #f0f0f0;
        }
        
        .followed-activity-item:last-child {
            border-bottom: none;
        }
        
        .followed-activity-avatar {
            width: 50px;
            height: 50px;
            border-radius: 8px;
            object-fit: cover;
            margin-right: 12px;
            background: #f0f0f0;
        }
        
        .followed-activity-details {
            flex: 1;
        }
        
        .followed-activity-title {
            font-weight: 500;
            margin-bottom: 4px;
        }
        
        .followed-activity-meta {
            color: #666;
            font-size: 0.85rem;
        }
        
        .followed-activity-action {
            color: #667eea;
            font-size: 0.9rem;
        }
        
        /* 空状态 */
        .empty-state {
            text-align: center;
            padding: 30px 0;
            color: #666;
        }
        
        .empty-icon {
            font-size: 2.5rem;
            margin-bottom: 10px;
            opacity: 0.5;
        }
        
        /* 底部导航 */
        .bottom-nav {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: white;
            display: flex;
            justify-content: space-around;
            padding: 10px 0;
            box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
            z-index: 100;
        }
        
        .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-decoration: none;
            color: #666;
            font-size: 0.75rem;
            flex: 1;
        }
        
        .nav-icon {
            font-size: 1.2rem;
            margin-bottom: 4px;
        }
        
        .nav-item.active {
            color: #667eea;
        }
        
        /* 响应式调整 */
        @media (min-width: 768px) {
            .container {
                max-width: 500px;
                margin: 0 auto;
            }
            
            .user-card, .content-section {
                margin: 15px 0;
            }
        }