/* Banner 区域 */
.ys-banner {
    width: 100%;
    height: 50vh;
    background-image: url('https://www.jmruixiang.com/wp-content/themes/twentyseventeen/rx/images/banner3.jpg');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 10rem 5rem;
    position: relative;
    overflow: hidden;
}

.ys-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 1;
}
.ys-banner-content {
    position: relative;
    z-index: 2;
    max-width: 90%;
    margin: 0 auto;
}
.ys-banner .p2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: justify;
}
  /* === 整体容器 === */
        .advantage-container {
            display: flex;
            align-items: center;
            gap: 40px;
            padding: 40px 20px;
            max-width: 1000px;
            margin: 0 auto 60px; /* 增加底部间距 */
            background: rgba(255, 255, 255, 0.95);
            border-radius: 16px;
            /* box-shadow: 0 15px 50px rgba(0, 0, 0, 0.3); */
            overflow: hidden;
            position: relative;
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        
        /* 入场动画激活状态 */
        .advantage-container.appear {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* 偶数项从右侧进入 */
        .advantage-container:nth-child(even) {
            transform: translateX(50px) translateY(30px);
        }
        
        .advantage-container:nth-child(even).appear {
            transform: translateX(0) translateY(0);
        }
        
        /* 添加科技感装饰条 */
        .advantage-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 5px;
            height: 100%;
            /* background: linear-gradient(to bottom, #517dff, #64ffda); */
            opacity: 0;
            transition: opacity 0.5s ease 0.3s;
        }
        
        .advantage-container.appear::before {
            opacity: 1;
        }
        
        /* === 图像容器：固定 4:3 比例，圆角 + 阴影 === */
        .advantage-image {
            width: 360px;
            height: 270px; /* 4:3 = 360:270 */
            border-radius: 12px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
            overflow: hidden;
            background: linear-gradient(45deg, #e0f7fa, #bbdefb);
            display: flex;
            align-items: center;
            justify-content: center;
            transform: scale(0.9);
            opacity: 0;
            transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275), 
                        opacity 0.6s ease;
        }
        
        .advantage-container.appear .advantage-image {
            transform: scale(1);
            opacity: 1;
        }
        
        /* === 图片：填满容器，保持比例，不裁剪 === */
        .advantage-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform 0.5s ease;
        }
        
        .advantage-image:hover img {
            transform: scale(1.05);
        }
        
        /* === 内容区域 === */
        .advantage-content {
            flex: 1;
            min-width: 0;
            opacity: 0;
            transform: translateX(-20px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        
        .advantage-container.appear .advantage-content {
            opacity: 1;
            transform: translateX(0);
        }
        
        /* 偶数项内容从右侧进入 */
        .advantage-container:nth-child(even) .advantage-content {
            transform: translateX(20px);
        }
        
        .advantage-container:nth-child(even).appear .advantage-content {
            transform: translateX(0);
        }
        
        .advantage-title {
            font-size: 28px;
            font-weight: 800;
            color: #1a237e;
            margin: 0 0 18px 0;
            line-height: 1.3;
            position: relative;
            display: inline-block;
        }
        
        .advantage-title::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 50px;
            height: 4px;
            background: linear-gradient(to right, #517dff, #64ffda);
            border-radius: 2px;
        }
        
        .advantage-desc1 {
            font-size: 18px;
            color: #517dff;
            line-height: 1.7;
            margin: 0;
            font-weight: 700;
            padding: 8px 0;
        }
        
        .advantage-desc2 {
            font-size: 16px;
            color: #555;
            line-height: 1.8;
            margin: 0;
            padding-top: 8px;
            border-top: 1px dashed #e0e0e0;
        }
        
        .advantage-desc1 + .advantage-desc2 {
            margin-top: 12px;
        }
        
        /* 响应式：小屏改为垂直布局 */
        @media (max-width: 768px) {
            .advantage-container {
                flex-direction: column;
                text-align: center;
                padding: 30px 20px;
            }
            
            .advantage-image {
                width: 100%;
                max-width: 400px;
                height: 270px;
                margin-bottom: 25px;
            }
            
            .advantage-content {
                text-align: center;
            }
            
            .advantage-title {
                font-size: 24px;
            }
            
            .advantage-desc1 {
                font-size: 17px;
            }
            
            .advantage-desc2 {
                font-size: 15px;
            }
            
            /* 移除交替方向动画 */
            .advantage-container:nth-child(even) {
                transform: translateY(30px);
            }
            
            .advantage-container:nth-child(even).appear {
                transform: translateY(0);
            }
            
            .advantage-container:nth-child(even) .advantage-content {
                transform: translateX(-20px);
            }
            
            .advantage-container:nth-child(even).appear .advantage-content {
                transform: translateX(0);
            }
        }
        
        @media (max-width: 480px) {
            body {
                padding: 20px 0;
            }
            
            .advantage-container {
                padding: 25px 15px;
                margin-bottom: 40px;
            }
            
            .advantage-image {
                height: 220px;
            }
            
            .advantage-title {
                font-size: 22px;
            }
            
            .advantage-desc1 {
                font-size: 16px;
            }
        }