/* ========================================= */
/* HYDRERGY 业务详情页面样式文件 */
/* ========================================= */
/* 作者：HYDRERGY 开发团队 */
/* 创建时间：2025年1月 */
/* 用途：业务详情页面专用样式，包含面包屑导航、侧边栏、产品展示等 */
/* 适用页面：hydrogen.html, co₂.html, consulting.html, zsm-membrane.html, anion-membrane.html, bench-water-electrolysis.html 等 */

/* ========================================= */
/* 业务页面专用样式覆盖 */

/* ========================================= */


/* ========================================= */
/* 主要内容布局样式 */
/* ========================================= */
/* 主要内容区域：白色背景，上下内边距 */
.main-content {
    padding: 40px 0; /* 上下内边距40px，与面包屑保持协调 */
    background: #fff; /* 白色背景 */
}

/* 内容布局：弹性布局，左侧边栏+右侧主体内容 */
.content-layout {
    display: flex; /* 弹性布局 */
    gap: 80px; /* 左右间距80px */
    max-width: 1200px; /* 最大宽度1200px */
    margin: 0 auto; /* 水平居中 */
    padding: 0 20px; /* 左右内边距20px */
}

/* ========================================= */
/* 左侧边栏样式 */
/* ========================================= */
/* 侧边栏：固定宽度300px，不收缩 */
.sidebar {
    width: 300px; /* 固定宽度300px */
    flex-shrink: 0; /* 不收缩 */
}

/* 侧边栏区块：浅灰背景，圆角，内边距，底部间距 */
.sidebar-section {
    background: #f8f9fa; /* 浅灰背景 */
    border-radius: 12px; /* 圆角12px */
    padding: 25px; /* 内边距25px */
    margin-bottom: 30px; /* 底部间距30px */
}

/* 侧边栏区块标题：深色文字，底部蓝色边框 */
.sidebar-section h3 {
    font-size: 18px; /* 字体大小18px */
    font-weight: 600; /* 字体粗细600 */
    color: #333; /* 深色文字 */
    margin-bottom: 20px; /* 底部间距20px */
    padding-bottom: 10px; /* 底部内边距10px */
    border-bottom: 2px solid #007bff; /* 底部蓝色边框2px */
}

/* 业务导航列表：去除默认样式，重置边距 */
.business-nav {
    list-style: none; /* 去除列表样式 */
    padding: 0; /* 重置内边距 */
    margin: 0; /* 重置外边距 */
}

.business-nav li {
    margin-bottom: 20px;
}

.business-nav a {
    display: block;
    padding: 12px 15px;
    background: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.business-nav a:hover {
    background: #0056b3;
    transform: translateX(5px);
}

.business-nav li.active a {
    background: #0056b3;
    font-weight: 600;
}

/* 推荐产品 */
.recommended-products .product-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    background: white;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.recommended-products .product-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.recommended-products .product-item img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 6px;
    flex-shrink: 0;
}

.recommended-products .product-info {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.recommended-products .product-info h4 {
    font-size: 14px;
    font-weight: 500;
    color: #333;
    margin: 0;
    line-height: 1.4;
}

.recommended-products .arrow {
    color: #007bff;
    font-weight: bold;
    font-size: 16px;
}

/* 中间主体区 */
.main-area {
    flex: 1;
}

.page-title {
    margin-top: 80px;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 3px solid #007bff;
}

.page-title h1 {
    font-size: 32px;
    font-weight: 700;
    color: #333;
    margin: 0;
}

/* 产品网格 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.product-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.product-card img {
    width: 100%;
    height: 160px;
    object-fit: contain;
    background: #f8f9fa;
    padding: 10px;
}

.product-card h3 {
    padding: 20px;
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin: 0;
    line-height: 1.4;
    text-align: center;
}

/* 页面标题区域 */
.page-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 80px 0 60px;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    color: #333;
    margin-bottom: 20px;
    font-weight: 700;
}

.page-header p {
    font-size: 20px;
    color: #666;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
}

/* 主要内容区域 */
.main-content {
    padding: 0;
}

.main-content section {
    padding: 80px 0;
}

.main-content section:nth-child(even) {
    background-color: #f8f9fa;
}

/* 技术概述区域 */
.tech-overview {
    background-color: #fff;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.text-content h2 {
    font-size: 36px;
    color: #333;
    margin-bottom: 30px;
    font-weight: 600;
    border-bottom: 3px solid #007bff;
    padding-bottom: 15px;
}

.text-content p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 40px;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.feature-item {
    display: flex;
    align-items: center;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    background: #e9ecef;
    transform: translateX(10px);
}

.feature-icon {
    font-size: 32px;
    margin-right: 20px;
    min-width: 50px;
}

.feature-text h3 {
    font-size: 18px;
    color: #333;
    margin-bottom: 5px;
    font-weight: 600;
}

.feature-text p {
    color: #666;
    margin: 0;
    font-size: 14px;
}

.image-content {
    text-align: center;
}

.tech-image {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.tech-image:hover {
    transform: scale(1.05);
}

/* 产品系列区域 */
.product-series h2 {
    text-align: center;
    font-size: 36px;
    color: #333;
    margin-bottom: 30px;
    font-weight: 600;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.product-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.product-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.product-header h3 {
    font-size: 22px;
    color: #333;
    margin: 0;
    font-weight: 600;
}

.product-tag {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.product-specs {
    margin-bottom: 20px;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    padding: 8px 0;
    border-bottom: 1px solid #f0f0f0;
}

.spec-label {
    color: #666;
    font-weight: 500;
}

.spec-value {
    color: #333;
    font-weight: 600;
}

.product-description {
    color: #666;
    line-height: 1.6;
    margin: 0;
    font-style: italic;
}

/* 应用场景区域 */
.applications h2 {
    text-align: center;
    font-size: 1.7 rem;
    color: #333;
    margin-bottom: 30px;
    font-weight: 600;
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

/* 2x2 应用场景布局 */
.application-grid-2x2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .application-grid-2x2 {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }
}

.application-item {
    text-align: center;
    padding: 40px 20px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.application-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.app-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: block;
}

.application-item h3 {
    font-size: 20px;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

.application-item p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* 技术优势区域 */
.tech-advantages h2 {
    text-align: center;
    font-size: 1.7rem;
    color: #333;
    margin-bottom: 60px;
    font-weight: 600;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 30px;
}

.advantage-card {
    background: white;
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(135deg, #007bff, #0056b3);
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.advantage-number {
    font-size: 48px;
    font-weight: 700;
    color: #007bff;
    margin-bottom: 20px;
    opacity: 0.8;
}

.advantage-card h3 {
    font-size: 22px;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

.advantage-card p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* 案例分析一行三列布局 */
.case-analysis-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin: 40px 0;
}

.case-analysis-grid .case-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    text-align: center;
    padding: 25px;
}

.case-analysis-grid .case-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.case-analysis-grid .case-item img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 20px;
}

.case-analysis-grid .case-item h3 {
    font-size: 18px;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

.case-analysis-grid .case-item p {
    color: #666;
    line-height: 1.6;
    font-size: 14px;
}

/* 服务客户两行五列布局 */
.client-grid-2x5 {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 25px;
    margin: 40px 0;
    padding: 0 20px;
}

.client-grid-2x5 .client-item {
    background: white;
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    min-height: 120px;
}

.client-grid-2x5 .client-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.client-grid-2x5 .client-item img {
    max-width: 100%;
    max-height: 80px;
    object-fit: contain;
    filter: grayscale(100%);
    transition: filter 0.3s ease;
}

.client-grid-2x5 .client-item:hover img {
    filter: grayscale(0%);
}

/* 服务流程一行四列布局 */
.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin: 40px 0;
}

.process-grid .process-step {
    background: white;
    padding: 30px 20px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    position: relative;
}

.process-grid .process-step:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.process-grid .step-number {
    font-size: 32px;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, #007bff, #0056b3);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.process-grid .process-step h3 {
    font-size: 16px;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

.process-grid .process-step p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 数据库服务页面特定样式 */
.database-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 30px;
    margin-top: 30px;
}

.database-item {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.database-item:hover {
    transform: translateY(-5px);
}

.database-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.database-item h3 {
    margin: 0 0 15px 0;
    color: #2c3e50;
    font-size: 1.2rem;
}

.database-item p {
    margin: 0;
    color: #666;
    line-height: 1.6;
}

/* 服务特色布局优化 - 图标在左边，文字在右侧 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.feature-item {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    display: flex;
    align-items: flex-start;
    text-align: left;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.feature-icon {
    font-size: 48px;
    margin-right: 20px;
    margin-bottom: 0;
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.feature-content {
    flex: 1;
}

.feature-item h3 {
    font-size: 18px;
    color: #333;
    margin: 0 0 15px 0;
    font-weight: 600;
}

.feature-item p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* 数据统计展示 */
.data-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.stat-item {
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    color: #1565c0;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    border: 2px solid #2196f3;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 10px;
    color: #0d47a1;
}

.stat-label {
    font-size: 1rem;
    color: #1565c0;
    font-weight: 500;
}

/* 技术咨询页面特定样式 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.product-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-5px);
}

.product-card img {
    width: 100%;
    height: 267px;
    object-fit: contain;
    background: #f8f9fa;
    padding: 20px;
}

.product-card h3 {
    padding: 15px 20px 20px;
    margin: 0;
    font-size: 1.2rem;
    color: #2c3e50;
    text-align: center;
}

/* 响应式设计 */
@media screen and (max-width: 1024px) {
    .case-analysis-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .client-grid-2x5 {
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: repeat(4, 1fr);
    }
    
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 768px) {
    .case-analysis-grid {
        grid-template-columns: 1fr;
    }
    
    .client-grid-2x5 {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(5, 1fr);
    }
    
    .process-grid {
        grid-template-columns: 1fr;
    }
    
    .database-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(3, 1fr);
    }
    
    .data-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .feature-item {
        flex-direction: column;
        text-align: center;
    }

    .feature-icon {
         margin-right: 0;
         margin-bottom: 20px;
         justify-content: center;
     }
     
     .product-grid {
         grid-template-columns: 1fr;
     }
 }

@media screen and (max-width: 768px) {
    .page-header {
        padding: 60px 0 40px;
    }
    
    .page-header h1 {
        font-size: 32px;
    }
    
    .page-header p {
        font-size: 16px;
    }
    
    .main-content section {
        padding: 50px 0;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .text-content h2 {
        font-size: 28px;
    }
    
    .product-series h2,
    .applications h2,
    .tech-advantages h2 {
        font-size: 28px;
        margin-bottom: 40px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .applications-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
    }
    
    .feature-icon {
        margin-right: 0;
        margin-bottom: 15px;
    }
}

@media screen and (max-width: 480px) {
    .page-header {
        padding: 40px 0 30px;
    }
    
    .page-header h1 {
        font-size: 26px;
    }
    
    .page-header p {
        font-size: 14px;
    }
    
    .main-content section {
        padding: 40px 0;
    }
    
    .text-content h2 {
        font-size: 24px;
    }
    
    .product-series h2,
    .applications h2,
    .tech-advantages h2 {
        font-size: 24px;
        margin-bottom: 30px;
    }
    
    .product-card {
        padding: 20px;
    }
    
    .application-item {
        padding: 30px 15px;
    }
    
    .advantage-card {
        padding: 30px 20px;
    }
    
    .advantage-number {
        font-size: 36px;
    }
    

}

/* 环境效益区域样式 */
.environmental-benefits {
    background: linear-gradient(135deg, #e8f5e8 0%, #f0f8f0 100%);
}

.environmental-benefits h2 {
    text-align: center;
    font-size: 36px;
    color: #333;
    margin-bottom: 60px;
    font-weight: 600;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.benefit-item {
    display: flex;
    align-items: flex-start;
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.benefit-icon {
    font-size: 48px;
    margin-right: 20px;
    min-width: 60px;
}

.benefit-content h3 {
    font-size: 22px;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

.benefit-content p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

@media screen and (max-width: 768px) {
    .environmental-benefits h2 {
        font-size: 28px;
        margin-bottom: 40px;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .benefit-item {
        padding: 25px;
    }
    
    .benefit-icon {
        font-size: 36px;
        min-width: 50px;
        margin-right: 15px;
    }
    
    .benefit-content h3 {
        font-size: 18px;
    }
}

@media screen and (max-width: 480px) {
    .environmental-benefits h2 {
        font-size: 24px;
        margin-bottom: 30px;
    }
    
    .benefit-item {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }
    
    .benefit-icon {
         margin-right: 0;
         margin-bottom: 15px;
     }
 }

/* 咨询服务区域样式 */
.consulting-services h2 {
    text-align: center;
    font-size: 36px;
    color: #333;
    margin-bottom: 60px;
    font-weight: 600;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    text-align: center;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.service-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: block;
}

.service-card h3 {
    font-size: 22px;
    color: #333;
    margin-bottom: 20px;
    font-weight: 600;
}

.service-list {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
}

.service-list li {
    padding: 8px 0;
    color: #666;
    border-bottom: 1px solid #f0f0f0;
    position: relative;
    padding-left: 20px;
}

.service-list li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #007bff;
    font-weight: bold;
}

.service-list li:last-child {
    border-bottom: none;
}

/* 数据库服务区域样式 */
.database-services h2 {
    text-align: center;
    font-size: 36px;
    color: #333;
    margin-bottom: 60px;
    font-weight: 600;
}

.database-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 30px;
}

.database-category {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.database-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.category-header {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    padding: 25px;
    text-align: center;
}

.category-icon {
    font-size: 48px;
    margin-bottom: 15px;
    display: block;
}

.category-header h3 {
    font-size: 20px;
    margin: 0;
    font-weight: 600;
}

.category-content {
    padding: 25px;
}

.category-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.data-stats {
    display: flex;
    justify-content: space-around;
    gap: 15px;
}

.stat-item {
    text-align: center;
    flex: 1;
}

.stat-number {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: #007bff;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 12px;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 服务介绍区域样式 */
.service-intro {
    padding: 40px 0;
    background: #fff;
}

.intro-content h2 {
    font-size: 28px;
    color: #333;
    margin-bottom: 20px;
    font-weight: 600;
}

.intro-content p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

/* 服务特色区域样式 */
.service-features {
    padding: 40px 0;
    background: #f8f9fa;
}

.service-features .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.service-features h2 {
    text-align: center;
    font-size: 28px;
    color: #333;
    margin-top: 0;
    margin-bottom: 40px;
    font-weight: 600;
    padding-top: 20px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.feature-item {
    background: white;
    padding: 30px 20px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: block;
}

.feature-item h3 {
    font-size: 18px;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

.feature-item p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 服务流程区域样式 */
.service-process {
    padding: 40px 0;
    background: #fff;
}

.service-process h2 {
    text-align: center;
    font-size: 28px;
    color: #333;
    margin-bottom: 40px;
    font-weight: 600;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.step-item {
    background: white;
    padding: 30px 20px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    position: relative;
}

.step-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.step-number {
    font-size: 32px;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, #007bff, #0056b3);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.step-item h3 {
    font-size: 16px;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

.step-item p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 案例分析样式 */
.case-studies {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.case-item {
    background: white;
    padding: 15px;
    border-radius: 12px;
    border-left: 4px solid #007bff;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.case-item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.case-item h4 {
    color: #333;
    font-size: 16px;
    margin-bottom: 8px;
    font-weight: 600;
}

.case-item p {
    color: #666;
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
}

/* 合作客户样式 */
.client-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.client-item {
    background: white;
    padding: 15px;
    border-radius: 12px;
    border-left: 4px solid #28a745;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.client-item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.client-item h4 {
    color: #333;
    font-size: 16px;
    margin-bottom: 8px;
    font-weight: 600;
}

.client-item p {
    color: #666;
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
}

/* 联系诱导文字样式 */
.contact-cta {
    margin: 0;
    font-size: 14px;
    color: #007bff;
    font-weight: 500;
    text-align: center;
    font-style: italic;
    order: 2;
}

.process-timeline {
    display: flex;
    flex-direction: column;
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.process-step {
    display: flex;
    align-items: center;
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    position: relative;
}

.process-step:hover {
    transform: translateX(10px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.step-number {
    font-size: 32px;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, #007bff, #0056b3);
    width: 210px;
    height: 210px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 25px;
    min-width: 210px;
}

.step-content h3 {
    font-size: 20px;
    color: #333;
    margin-bottom: 10px;
    font-weight: 600;
}

.step-content p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* 成功案例区域样式 */
.success-cases h2 {
    text-align: center;
    font-size: 36px;
    color: #333;
    margin-bottom: 60px;
    font-weight: 600;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.case-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.case-header {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.case-header h3 {
    font-size: 18px;
    color: #333;
    margin: 0;
    font-weight: 600;
    flex: 1;
}

.case-tag {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    margin-left: 15px;
}

.case-content {
    padding: 25px;
}

.case-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.case-results {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.result-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.result-label {
    color: #666;
    font-size: 14px;
}

.result-value {
    color: #007bff;
    font-weight: 600;
    font-size: 14px;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .consulting-services h2,
    .database-services h2,
    .service-process h2,
    .success-cases h2 {
        font-size: 28px;
        margin-bottom: 40px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .database-grid {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(6, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .process-step {
        flex-direction: column;
        text-align: center;
    }
    
    .step-number {
        margin-right: 0;
        margin-bottom: 20px;
    }
    
    .case-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .case-tag {
        margin-left: 0;
    }
    
    .case-results {
        justify-content: center;
    }
}

@media screen and (max-width: 480px) {
    .consulting-services h2,
    .database-services h2,
    .service-process h2,
    .success-cases h2 {
        font-size: 24px;
        margin-bottom: 30px;
    }
    
    .service-card {
        padding: 20px;
    }
    
    .category-header {
        padding: 20px;
    }
    
    .category-content {
        padding: 20px;
    }
    
    .process-step {
        padding: 20px;
    }
    
    .case-header {
        padding: 20px;
    }
    
    .case-content {
        padding: 20px;
    }
    
    .data-stats {
        flex-direction: column;
        gap: 10px;
    }
}

/* ========================================= */
/* 统一标题样式 */
/* ========================================= */
/* 所有子网页的section-title统一样式 */
.section-title {
    font-size: 28px; /* 统一字体大小改为28px */
    margin-top: -50px; /* 统一上边距，与其他元素保持适当距离 */
    margin-bottom: 20px; /* 统一下边距 */
    color: #2c3e50; /* 深色文字 */
    text-align: center; /* 居中对齐 */
    font-weight: 600; /* 字体粗细 */
    position: relative; /* 为装饰线提供定位基准 */
    padding-bottom: 15px; /* 为装饰线预留空间 */
}

/* section-title装饰线样式 */
.section-title::after {
    content: ''; /* 空内容 */
    position: absolute; /* 绝对定位 */
    bottom: 0; /* 位于底部 */
    left: 50%; /* 水平居中 */
    transform: translateX(-50%); /* 精确居中 */
    width: 60px; /* 装饰线宽度 */
    height: 3px; /* 装饰线高度 */
    background-color: #007bff; /* 蓝色装饰线 */
    border-radius: 2px; /* 圆角 */
}

/* 第一个section-title不需要上边距（紧跟在页面标题后） */
.service-intro .section-title,
.page-title + section .section-title,
.main-content > section:first-child .section-title {
    margin-top: 0; /* 第一个标题不需要上边距 */
}

/* 页面主标题样式（h1级别的section-title） */
h1.section-title {
    font-size: 28px; /* 主标题字体统一为28px */
    margin-top: 20px; /* 主标题较小上边距 */
    margin-bottom: 30px; /* 主标题较大下边距 */
}

/* 板块标题样式（h2级别的section-title） */
h2.section-title {
    font-size: 28px; /* 板块标题字体统一为28px */
}

/* 子标题样式（h3级别的section-title） */
h3.section-title {
    font-size: 28px; /* 子标题字体统一为28px */
    margin-top: 30px; /* 子标题较小上边距 */
    margin-bottom: 15px; /* 子标题较小下边距 */
}

/* ========================================= */
/* 台架式电解水测试系统页面专用样式 */
/* ========================================= */

/* 产品概述样式 */
.product-overview {
    margin-bottom: 40px;
}

.overview-content {
    display: flex;
    gap: 40px;
    align-items: center;
    margin-top: 30px;
}

.overview-text {
    flex: 1;
}

.overview-text p {
    font-size: 16px;
    line-height: 1.8;
    color: #555;
    margin-top: 20px;
    text-align: justify;
}

.overview-image {
    flex: 0 0 400px;
}

.overview-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

/* 技术特点网格样式 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 30px;
}

.feature-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    background: #fff;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #2c3e50;
    font-weight: 600;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
    font-size: 14px;
}

/* 技术参数表格样式 */
.specs-table {
    margin-top: 30px;
    overflow-x: auto;
}

.specs-table table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.specs-table th,
.specs-table td {
    padding: 15px 20px;
    text-align: center; /* 改为居中对齐 */
    border-bottom: 1px solid #e9ecef;
}

.specs-table th {
    background: #007bff;
    color: white;
    font-weight: 600;
    font-size: 16px;
}

.specs-table td {
    font-size: 15px;
    color: #555;
}

.specs-table tr:hover {
    background: #f8f9fa;
}

.specs-table tr:last-child td {
    border-bottom: none;
}

/* 应用领域网格样式 */
.applications-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 30px;
}

.application-card {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    border-left: 4px solid #007bff;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.application-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.application-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #2c3e50;
    font-weight: 600;
}

.application-card p {
    color: #666;
    line-height: 1.6;
    font-size: 15px;
}

/* 服务支持样式 */
.support-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 30px;
}

.support-item {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 12px;
    border-top: 3px solid #28a745;
    transition: all 0.3s ease;
}

.support-item:hover {
    background: #fff;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.support-item h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: #2c3e50;
    font-weight: 600;
}

.support-item p {
    color: #666;
    line-height: 1.6;
    font-size: 14px;
}

/* ========================================= */
/* 重新设计的应用领域样式 */
/* ========================================= */
.applications-redesign {
    margin: 60px 0;
    padding: 0 20px;
}

.applications-redesign .section-header {
    text-align: center;
    margin-bottom: 50px;
}

.applications-redesign .section-title {
    font-size: 28px;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 700;
}

.applications-redesign .section-subtitle {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.applications-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

/* 2*2网格布局样式 */
.applications-grid-2x2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

/* 1行4列网格布局样式 - 使用更高优先级 */
.applications-container.applications-1x4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr) !important;
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.application-item {
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    border-radius: 16px;
    padding: 30px 30px 105px 30px; /* 底部增加75·px额外空间 */
    box-shadow: 0 8px 30px rgba(0,0,0,0.08);
    transition: all 0.4s ease;
    border: 1px solid #e9ecef;
    position: relative;
    overflow: hidden;
    /* 容器自适应内容高度，底部增加100px额外空间 */
    min-height: 300px; /* 保持最小高度不变 */
}

.application-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #007bff, #0056b3);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.application-item:hover::before {
    transform: scaleX(1);
}

.application-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0,123,255,0.15);
}

.app-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.app-content h3 {
    font-size: 1.4rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.app-content p {
    color: #666;
    line-height: 1.7;
    margin-bottom: 20px;
    font-size: 15px;
}

.app-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    align-items: flex-start;
    min-height: 80px; /* 增加最小高度以确保一致性 */
    /* height: 80px; 移除固定高度限制，允许Academic Research标签移动 */
    margin-top: 0px; /* 重置为默认值 */
    padding: 8px 0;
    position: relative;
    /* overflow: hidden; 移除溢出隐藏，允许标签显示在容器外 */
}

/* 针对所有application-item中的标签进行特殊定位 */
.application-item:first-child .app-features,
.application-item:nth-child(2) .app-features,
.application-item:nth-child(3) .app-features,
.application-item:nth-child(4) .app-features {
    position: absolute;
    bottom: 10px;
    left: 30px;
    right: 30px;
    margin-top: 0; /* 重置margin-top */
}

/* 确保所有application-item容器支持绝对定位 */
.application-item:first-child,
.application-item:nth-child(2),
.application-item:nth-child(3),
.application-item:nth-child(4) {
    position: relative;
    overflow: visible;
}


.feature-tag {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    padding: 0;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    width: 140px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    box-sizing: border-box;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-shrink: 0;
    margin: 0 2px;
    vertical-align: top;
}

/* 确保英文版本下标签对齐一致 */
[data-lang="en"] .feature-tag {
    font-size: 11px;
    padding: 12px 14px;
    min-width: 110px;
    max-width: 170px;
    height: 42px;
    margin: 0 2px;
}

/* ========================================= */
/* 重新设计的服务支持样式 */
/* ========================================= */
.service-support-redesign {
    margin: 60px 0;
    padding: 60px 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.service-support-redesign .section-header {
    text-align: center;
    margin-bottom: 50px;
}

.service-support-redesign .section-title {
    font-size: 28px;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 700;
}

.service-support-redesign .section-subtitle {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

/* 服务支持1行4列布局 */
.support-1x4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.support-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    transition: all 0.4s ease;
    border: 2px solid #f0f0f0;
    position: relative;
    display: flex;
    flex-direction: column;
    /* 容器自适应内容高度，底部增加100px额外空间 */
    min-height: 200px; /* 保持最小高度不变 */
    padding-bottom: -40px; /* 底部增加100px额外空间 */
}

.support-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 50px rgba(0,123,255,0.15);
    border-color: #007bff;
}

.card-header {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: white;
    padding: 30px 25px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.card-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
    transform: rotate(45deg);
    transition: all 0.6s ease;
    opacity: 0;
}

.support-card:hover .card-header::before {
    opacity: 1;
    animation: shimmer 1.5s ease-in-out;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.support-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
    display: block;
}

.card-header h3 {
    font-size: 1.3rem;
    margin: 0;
    font-weight: 600;
}

.card-content {
    padding: 30px 25px;
    background: linear-gradient(180deg, #ffffff 0%, #fafbfc 100%);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-content p {
    color: #666;
    line-height: 1.7;
    margin-bottom: 20px;
    font-size: 15px;
}

.service-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
    justify-content: center;
}

.service-features li {
    padding: 8px 0;
    color: #555;
    font-size: 14px;
    position: relative;
    min-height: 32px;
    /* 移除固定高度，让内容自适应 */
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    line-height: 1.4; /* 统一行高 */
}

.service-features li::before {
    content: '✓';
    color: #28a745;
    font-weight: bold;
    margin-right: 6px;
    display: inline-block;
    flex-shrink: 0; /* 防止符号被压缩 */
}

/* 中等屏幕响应式设计 */
@media (max-width: 1024px) and (min-width: 769px) {
    .applications-container.applications-1x4,
    .support-1x4 {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 25px;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .overview-content {
        flex-direction: column;
        gap: 20px;
    }
    
    .overview-image {
        flex: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .applications-grid,
    .support-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .specs-table {
        font-size: 14px;
    }
    
    .specs-table th,
    .specs-table td {
        padding: 10px 15px;
    }
    
    /* 新设计的响应式样式 */
    .applications-redesign .section-title,
    .service-support-redesign .section-title {
        font-size: 28px;
    }
    
    .applications-container,
    .applications-grid-2x2,
    .applications-container.applications-1x4,
    .support-grid,
    .support-1x4 {
        grid-template-columns: 1fr !important;
        gap: 20px;
    }
    
    .applications-grid-2x2 {
        grid-template-rows: auto;
    }
    
    .application-item,
    .support-card {
        padding: 20px;
    }
    
    .service-support-redesign {
        padding: 40px 20px;
    }
}

/* ========================================= */
/* 系统构成模块样式 */
/* ========================================= */
.system-composition {
    margin: 60px 0;
    padding: 60px 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

/* 系统构成网格布局 */
.composition-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

/* 1行5列布局 */
.composition-grid.composition-1x5 {
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    max-width: 1400px;
    margin: 0 auto;
}

/* 2行3列布局 */
.composition-grid.composition-2x3 {
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

/* 系统构成项目 */
.composition-item {
    background: white;
    border-radius: 15px;
    padding: 25px 20px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border: 2px solid #f0f0f0;
    display: flex;
    flex-direction: column;
    min-height: 400px; /* 基础最小高度 */
    height: auto;
}

.composition-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0,123,255,0.15);
    border-color: #007bff;
}

.composition-visual {
    margin-bottom: 20px;
}

.composition-icon-wrapper {
    position: relative;
    display: inline-block;
    margin-bottom: 15px;
}

.composition-icon-bg {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.1;
}

.composition-icon {
    width: 60px;
    height: 60px;
    position: relative;
    z-index: 1;
}

.composition-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    height: 100%;
    position: relative;
}

.composition-content h3 {
    font-size: 1.1rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.composition-content p {
    text-align: center;
    margin-bottom: -70px;
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.composition-features {
    list-style: none;
    padding: 0;
    margin: 8px 0 0 0;
    text-align: center;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.composition-features li {
    padding: 5px 0;
    color: #666;
    font-size: 13px;
    position: relative;
    padding-left: 8px;
}

.composition-features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #007bff;
    font-weight: bold;
}

/* 响应式设计 - 保持1行5列布局，只调整间距和大小 */
@media (max-width: 1400px) {
    .composition-grid.composition-1x5 {
        gap: 15px;
        max-width: 1200px;
    }
    
    .composition-grid.composition-2x3 {
        gap: 25px;
        max-width: 900px;
    }
    
    .composition-item {
        padding: 20px 15px;
    }
}

@media (max-width: 1200px) {
    .composition-grid.composition-1x5 {
        gap: 12px;
        max-width: 1000px;
    }
    
    .composition-grid.composition-2x3 {
        gap: 20px;
        max-width: 800px;
    }
    
    .composition-item {
        padding: 18px 12px;
    }
    
    .composition-content h3 {
        font-size: 1rem;
    }
}

@media (max-width: 992px) {
    .composition-grid.composition-1x5 {
        gap: 10px;
        max-width: 900px;
    }
    
    .composition-grid.composition-2x3 {
        gap: 15px;
        max-width: 700px;
    }
    
    .composition-item {
        padding: 15px 10px;
    }
    
    .composition-icon {
        width: 50px;
        height: 50px;
    }
    
    .composition-icon-bg {
        width: 70px;
        height: 70px;
    }
    
    .composition-content h3 {
        font-size: 0.95rem;
    }
    
    .composition-features li {
        font-size: 12px;
    }
}

@media (max-width: 768px) {
    .composition-grid.composition-1x5 {
        gap: 8px;
        max-width: 100%;
        padding: 0 10px;
    }
    
    .composition-grid.composition-2x3 {
        grid-template-columns: 1fr;
        gap: 20px;
        max-width: 100%;
        padding: 0 10px;
    }
    
    .composition-item {
        padding: 12px 8px;
    }
    
    .composition-content h3 {
        font-size: 0.9rem;
        margin-bottom: 10px;
    }
    
    .composition-features li {
        font-size: 11px;
        padding: 3px 0;
    }
}

@media (max-width: 576px) {
    .composition-grid.composition-1x5 {
        gap: 5px;
        padding: 0 5px;
    }
    
    .composition-grid.composition-2x3 {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: 0 5px;
    }
    
    .composition-item {
        padding: 10px 6px;
    }
    
    .composition-icon {
        width: 40px;
        height: 40px;
    }
    
    .composition-icon-bg {
        width: 60px;
        height: 60px;
    }
    
    .composition-content h3 {
        font-size: 0.8rem;
        margin-bottom: 8px;
    }
    
    .composition-features {
        display: none; /* 在极小屏幕上隐藏特性列表以节省空间 */
    }
}

.system-composition .section-header {
    text-align: center;
    margin-bottom: 50px;
}

.system-composition .section-title {
    font-size: 28px;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 700;
}

.system-composition .section-subtitle {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.system-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.system-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    transition: all 0.4s ease;
    border: 2px solid #f0f0f0;
    position: relative;
}

.system-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 50px rgba(0,123,255,0.15);
    border-color: #007bff;
}

.system-card .card-header {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: white;
    padding: 30px 25px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.system-card .card-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
    transform: rotate(45deg);
    transition: all 0.6s ease;
    opacity: 0;
}

.system-card:hover .card-header::before {
    opacity: 1;
    animation: shimmer 1.5s ease-in-out;
}

.system-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    display: block;
}

.system-card .card-header h3 {
    font-size: 1.3rem;
    margin: 0;
    font-weight: 600;
}

.system-card .card-content {
    padding: 30px 25px;
    background: linear-gradient(180deg, #ffffff 0%, #fafbfc 100%);
}

.system-card .card-content p {
    color: #666;
    line-height: 1.7;
    margin-bottom: 20px;
    font-size: 15px;
}

.system-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.system-features li {
    padding: 8px 0;
    color: #555;
    font-size: 14px;
    position: relative;
    padding-left: 20px;
}

.system-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #28a745;
    font-weight: bold;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .system-composition .section-title {
        font-size: 28px;
    }
    
    .system-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .system-card {
        margin: 0 10px;
    }
    
    .system-composition {
        padding: 40px 20px;
    }
}