/* 主内容区域 */
        .about-us-container {
            max-width: 1440px;
            margin: 40px auto;
            padding: 0 20px;
            color: #333;
        }
        
        /* 内容块标题 */
        .section-title {
            text-align: center;
            margin-bottom: 40px;
			margin-top: 40px;
            position: relative;
            font-size: 2rem;
            color: var(--primary-black);
        }
        
        .section-title:after {
            content: '';
            display: block;
            width: 70px;
            height: 4px;
            background: var(--primary-color);
            margin: 10px auto 0;
            border-radius: 2px;
        }
        
        /* 公司简介部分 */
        .intro-section {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-bottom: 60px;
            padding: 20px;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        }
        
        .intro-content {
            flex: 1;
            min-width: 300px;
			overflow: hidden; /* 防止内容溢出 */
        }
        
        .intro-text {
            line-height: 1.8;
            margin-bottom: 25px;
            color: #444;
            font-size: 1.05rem;
        }
        
        .intro-highlight {
            background: linear-gradient(120deg, rgba(198,12,48,0.1) 0%, rgba(198,12,48,0.05) 100%);
            border-left: 4px solid var(--primary-color);
            padding: 20px;
            border-radius: 0 4px 4px 0;
            margin-top: 20px;
        }
        
        .intro-highlight h3 {
            color: var(--primary-color);
            margin-bottom: 15px;
        }
        
        /* 修改3：更新容器样式 */
        .image-container {
            flex: 1;
            min-width: 300px;
            position: relative;
            border-radius: 8px;
            overflow: hidden; /* 保留溢出隐藏 */
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            background-color: var(--dark-bg); /* 容器背景填充留白区域 */
            display: flex;
            align-items: center;
            justify-content: center;
            aspect-ratio: 16/9; /* 保持比例 */
        }

        
        /* 修改4：响应式图片样式 */
        .responsive-image {
            width: 100%;
            height: 100%;
            object-fit: contain; /* 完整显示图片，避免裁剪 */
            display: block;
            transition: transform 0.3s ease;
        }
        
        /* 修改5：添加悬停效果 */
        .image-container:hover .responsive-image {
            transform: scale(1.03);
        }
        
        
        /* 公司特点部分 */
        .features-section {
            margin-bottom: 60px;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
            gap: 30px;
            margin-top: 20px;
        }
        
        .feature-card {
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            transition: transform 0.3s ease;
            border-top: 4px solid var(--primary-color);
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        
        .feature-icon {
            text-align: center;
            font-size: 2.5rem;
            color: var(--primary-color);
            margin: 20px 0;
        }
        
        .feature-content {
            padding: 15px 25px 30px;
        }
        
        .feature-card h3 {
            color: var(--primary-black);
            text-align: center;
            margin-bottom: 15px;
        }
        
        .feature-content p {
            color: var(--gray);
            text-align: center;
            line-height: 1.7;
        }
        
        /* 公司历史部分 */
        .history-section {
            margin-bottom: 60px;
            padding: 40px 20px;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        }
        
        .timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }
        
        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background-color: #e0e0e0;
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -3px;
        }
        
        .timeline-item {
            position: relative;
            width: 50%;
            padding: 15px 40px;
            transition: all 0.4s ease;
        }
        
        .timeline-item:hover {
            transform: scale(1.03);
        }
        
        .timeline-item::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            background-color: white;
            border: 4px solid var(--primary-color);
            top: 25px;
            border-radius: 50%;
            z-index: 1;
        }
        
        .timeline-left {
            left: 0;
        }
        
        .timeline-right {
            left: 50%;
        }
        
        .timeline-right::after {
            left: -10px;
        }
        
        .timeline-left::after {
            right: -10px;
        }
        
        .timeline-content {
            padding: 20px 30px;
            background-color: #f8f9fa;
            position: relative;
            border-radius: 6px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            border-left: 3px solid var(--primary-color);
        }
        
        .timeline-content h3 {
            color: var(--primary-black);
            margin-bottom: 10px;
        }
        
        .timeline-content .year {
            position: absolute;
            top: -15px;
            background: var(--primary-color);
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-weight: bold;
        }
        
        .timeline-left .year {
            right: 15px;
        }
        
        .timeline-right .year {
            left: 15px;
        }
        
        /* 证书和实拍图部分 */
        .gallery-section {
            margin-bottom: 60px;
        }
        
        .gallery-tabs {
            display: flex;
            justify-content: center;
            margin-bottom: 25px;
            flex-wrap: wrap;
        }
        
        .gallery-tab {
            padding: 10px 25px;
            margin: 0 5px 10px;
            background: white;
            border: 1px solid var(--border);
            border-radius: 30px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .gallery-tab.active, 
        .gallery-tab:hover {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        
        .gallery-content {
            display: none;
        }
        
        .gallery-content.active {
            display: block;
            animation: fadeIn 0.5s;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        
        .certificates-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
        }
        
        .certificate-item {
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
            transition: transform 0.3s ease;
        }
        
        .certificate-item:hover {
            transform: translateY(-5px);
        }
        
        .certificate-image {
            width: 100%;
            height: 200px;
            background: #f1f1f1;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #999;
            font-size: 0.9rem;
			position: relative;
			overflow: hidden;
        }
        .certificate-image img {
            width: 100%;
            height: 100%;
            object-fit: contain; /* 完整显示证书 */
            display: block;
            background: #f8f9fa;
            padding: 10px;
        }
        .certificate-info {
            padding: 15px;
            text-align: center;
        }
        
        .certificate-info h4 {
            color: var(--primary-black);
            margin-bottom: 5px;
        }
        
        .photos-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
        }
        
        .photo-item {
            border-radius: 8px;
			overflow: hidden;
			box-shadow: 0 3px 10px rgba(0,0,0,0.08);
			position: relative;
			height: 250px;
        }
        .photo-item img {
            width: 100%;
            height: 100%;
            object-fit: cover; /* 填充容器 */
            display: block;
            transition: transform 0.3s ease;
        }
        
        .photo-item:hover img {
            transform: scale(1.05);
        }
        
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .timeline::after {
                left: 31px;
            }
            
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            
            .timeline-right, 
            .timeline-left {
                left: 0;
            }
            
            .timeline-left::after,
            .timeline-right::after {
                left: 21px;
            }
            
            .timeline-left .year,
            .timeline-right .year {
                left: 70px;
                right: auto;
            }
			.image-container {
			max-height: 400px;
		    }
        }
        
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            
            .intro-section {
                flex-direction: column;
				gap: 15px;
            }
            .intro-text {
                font-size: 1rem;
                line-height: 1.6;
              }
            .image-container {
				width: 100%;
				min-width: unset;
				margin-top: 15px;
				aspect-ratio: 3/2; /* 移动端使用更合适的比例 */
			}
			
			.responsive-image {
				object-fit: contain; /* 移动端完整显示图片 */
			}
			
			.intro-section {
				flex-direction: column;
				gap: 25px;
			}
            
            .features-grid {
                grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            }
			.certificate-image {
				height: 180px;
			}
			
			.photo-item {
				height: 200px;
			}
			
			.certificates-grid,
			.photos-grid {
				grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
			}
        }
        
        @media (max-width: 480px) {
            .section-title {
                font-size: 1.4rem;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
            }
			.image-container {
				aspect-ratio: 4/3;
			}
			  
			.intro-highlight {
				padding: 15px;
			}
			.certificate-image {
				height: 150px;
			}
			
			.photo-item {
				height: 180px;
			}
			
			.certificates-grid,
			.photos-grid {
				grid-template-columns: 1fr;
			}
        }
/* 添加加载动画 */
.video-container.loading::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
    z-index: 10;
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}