/* 头部区域 */
        .navigation-header {
            text-align: center;
            margin-bottom: 40px;
            animation: fadeInDown 0.6s ease;
            padding-top: 30px;
        }
        
        .title {
            color: #333;
            font-size: 36px;
            margin-bottom: 12px;
            font-weight: 600;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
        }
        
        .title-icon {
            font-size: 36px;
        }
        
        .subtitle {
            color: #666;
            font-size: 16px;
        }
        
        /* 路线切换器 */
        .route-switcher {
            display: flex;
            gap: 12px;
            justify-content: center;
            margin-bottom: 40px;
            animation: fadeInUp 0.6s ease 0.2s backwards;
        }
        
        .switch-btn {
            padding: 12px 32px;
            border: 1px solid #e0e0e0;
            background: white;
            color: #666;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s ease;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
        }
        
        .switch-btn:hover {
            border-color: #0368d9;
            color: #0368d9;
            background: #f8fbff;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
        }
        
        .switch-btn.active {
            background: #0368d9;
            color: white;
            border-color: #0368d9;
            box-shadow: 0 4px 12px rgba(3, 104, 217, 0.25);
        }
        
        .switch-icon {
            width: 20px;
            height: 20px;
            object-fit: contain;
        }
        
        /* 路线标题 */
        .route-title {
            font-size: 24px;
            font-weight: 600;
            color: #333;
            margin-bottom: 24px;
            text-align: center;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        
        /* 图片网格容器 */
        .images-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
            animation: fadeInUp 0.6s ease 0.4s backwards;
            padding-bottom: 30px;
        }
        
        /* 单个图片卡片 */
        .image-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            animation: scaleIn 0.5s ease backwards;
            display: flex;
            flex-direction: column;
        }
        
        .image-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
        }
        
        .image-wrapper {
            width: 100%;
            height: 400px;
            overflow: hidden;
            background: #fafafa;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .image-card img {
            width: 100%;
            height: 100%;
            object-fit: contain;
            display: block;
            transition: transform 0.3s ease;
        }
        
        .image-card:hover img {
            transform: scale(1.05);
        }
        
        .image-caption {
            padding: 16px;
            text-align: center;
            font-size: 15px;
            color: #0368d9;
            font-weight: 500;
            background: #fafafa;
        }
        
        /* 空状态 */
        .empty-state {
            text-align: center;
            padding: 60px 20px;
            color: #999;
            font-size: 16px;
        }
        
        /* 加载动画 */
        .loading {
            grid-column: 1 / -1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 80px 20px;
            gap: 20px;
        }
        
        .loading-spinner {
            width: 48px;
            height: 48px;
            border: 3px solid #f0f0f0;
            border-top-color: #0368d9;
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }
        
        .loading-text {
            color: #666;
            font-size: 15px;
            font-weight: 400;
        }
        
        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }
        
        /* 动画关键帧 */
        @keyframes fadeInDown {
            from {
                opacity: 0;
                transform: translateY(-30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes scaleIn {
            from {
                opacity: 0;
                transform: scale(0.9);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }
        
        /* 响应式 */
        @media (max-width: 768px) {
            body {
                padding: 20px 15px;
            }
            
            .title {
                font-size: 28px;
            }
            
            .title-icon {
                font-size: 28px;
            }
            
            .subtitle {
                font-size: 14px;
            }
            
            .route-switcher {
                flex-direction: column;
                gap: 10px;
            }
            
            .switch-btn {
                width: 100%;
                justify-content: center;
                font-size: 15px;
                padding: 12px 24px;
            }
            
            .route-title {
                font-size: 20px;
            }
            
            .images-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            
            .image-wrapper {
                height: 350px;
            }
        }
        
        @media (min-width: 769px) and (max-width: 1024px) {
            .images-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (min-width: 1025px) {
            .images-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }