/* ==========================================================================
   基础CSS变量和重置样式
   ========================================================================== */

/* CSS变量定义 */
:root {
    /* 颜色系统 */
    --primary-color: #2d5aa0;
    --secondary-color: #ff6b35;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    
    /* 场景卡片颜色 */
    --scenario-color-1: var(--primary-color);
    --scenario-color-2: #2a8d8d;
    --scenario-color-3: #c27a2c;
    --scenario-color-4: #7a3fa8;
    --scenario-color-5: #2d7d7d;
    --scenario-color-6: #5a8e39;
    
    /* 中性色 */
    --dark-color: #2c3e50;
    --light-color: #f8f9fa;
    --text-color: #333333;
    --text-light: #6c757d;
    --border-color: #dee2e6;
    --white: #ffffff;
    --black: #000000;
    
    /* 阴影 */
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    
    /* 边框 */
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;
    
    /* 过渡 */
    --transition: all 0.3s ease;
    
    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
    
    /* 字体 */
    --font-family-base: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-family-heading: 'Poppins', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-xxl: 24px;
    
    /* 容器宽度 */
    --container-width: 1200px;
    --container-padding: 20px;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

/* 链接样式 */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--secondary-color);
}

/* 图片响应式 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 列表样式 */
ul, ol {
    list-style-position: inside;
    padding-left: var(--spacing-md);
}

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

/* 段落样式 */
p {
    margin-bottom: var(--spacing-sm);
}

/* 按钮基础样式 */
button, .btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-family: var(--font-family-base);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

button:hover, .btn:hover {
    background-color: var(--dark-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--dark-color);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--white);
}

.btn-secondary:hover {
    background-color: var(--dark-color);
}

/* 容器样式 */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* 工具类 */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

/* ==========================================================================
   页面通用组件样式
   ========================================================================== */

/* 头部导航 */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 15px 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.logo-text h1 {
    font-size: 1.5rem;
    margin-bottom: 0;
}

.logo-text h1 span {
    color: var(--primary-color);
}

.tagline {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-bottom: 0;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-menu a {
    color: var(--text-color);
    font-weight: 600;
    padding: 8px 0;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-color);
    cursor: pointer;
    padding: 8px;
}

/* 页面标题 */
.page-header {
    padding: 120px 0 60px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--dark-color) 100%);
    color: var(--white);
    text-align: center;
    margin-top: 70px;
}

.page-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.page-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
}

/* 部分标题 */
.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--dark-color);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    text-align: center;
    line-height: 1.6;
}

/* 产品部分 */
.product-section {
    padding: var(--spacing-xxl) 0;
}

.product-section.section-alt {
    background-color: var(--light-color);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header .section-title {
    text-align: center;
}

.section-header .section-subtitle {
    text-align: center;
    margin: 0 auto;
}

/* 页脚 */
.footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: var(--spacing-xxl) 0 var(--spacing-xl);
}

/* ==========================================================================
   首页样式
   ========================================================================== */

/* 英雄区域 */
.hero {
    padding: 120px 0 60px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--dark-color) 100%);
    color: var(--white);
    margin-top: 70px;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--white);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: 1.4rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 15px;
    line-height: 1.4;
}

.hero-description {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 30px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.hero-image {
    flex: 1;
    max-width: 500px;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.hero-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
    transition: var(--transition);
}

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

/* 核心优势区域 */
.features {
    padding: var(--spacing-xxl) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #3a6bc4 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 1.8rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.6;
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* 产品预览区域 */
.products-preview {
    padding: var(--spacing-xxl) 0;
    background-color: var(--light-color);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.product-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 25px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    width: 80px;
    height: 80px;
    background-color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--primary-color);
    font-size: 2.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.product-card:hover .product-image {
    transform: scale(1.1);
}

.product-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 15px;
    flex-grow: 1;
}

.product-card p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 20px;
    font-size: 0.95rem;
    flex-grow: 2;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: auto;
}

.product-link:hover {
    color: var(--secondary-color);
}

.product-link i {
    transition: var(--transition);
}

.product-link:hover i {
    transform: translateX(5px);
}

/* 解决方案预览区域 */
.solutions-preview {
    padding: var(--spacing-xxl) 0;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.solution-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.solution-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #3a6bc4 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 1.8rem;
}

.solution-card:nth-child(2) .solution-icon {
    background: linear-gradient(135deg, var(--scenario-color-5) 0%, #3e9292 100%);
}

.solution-card:nth-child(3) .solution-icon {
    background: linear-gradient(135deg, var(--scenario-color-3) 0%, #d48d3e 100%);
}

.solution-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 15px;
    text-align: center;
}

.solution-card p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
}

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

.solution-features li {
    padding: 8px 0;
    color: var(--text-light);
    position: relative;
    padding-left: 25px;
    font-size: 0.9rem;
    line-height: 1.5;
}

.solution-features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1.5rem;
    line-height: 1;
}

.solution-card:nth-child(2) .solution-features li::before {
    color: var(--scenario-color-5);
}

.solution-card:nth-child(3) .solution-features li::before {
    color: var(--scenario-color-3);
}

/* 关于我们预览区域 */
.about-preview {
    padding: var(--spacing-xxl) 0;
    background-color: var(--light-color);
}

.about-content {
    display: flex;
    align-items: center;
    gap: 60px;
}

.about-text {
    flex: 1;
}

.about-image {
    flex: 1;
    max-width: 500px;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
    transition: var(--transition);
}

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

.about-highlights {
    margin: 25px 0 30px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    color: var(--text-color);
    font-weight: 500;
}

.highlight-item i {
    color: var(--success-color);
    font-size: 1.1rem;
}

.text-center {
    text-align: center;
    margin-top: 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

.footer-description {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-top: var(--spacing-sm);
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-links a:hover {
    color: var(--white);
    padding-left: 5px;
}

.contact-info {
    list-style: none;
    padding: 0;
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.8);
}

.contact-info i {
    width: 20px;
    text-align: center;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-lg);
}

/* ==========================================================================
   产品中心卡片列表样式
   ========================================================================== */

/* 产品过滤标签 */
.filter-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin: 30px 0;
}

.filter-tab {
    padding: 10px 24px;
    background-color: var(--light-color);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-weight: 600;
    color: var(--dark-color);
    cursor: pointer;
    transition: var(--transition);
}

.filter-tab:hover {
    background-color: rgba(45, 90, 160, 0.1);
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.filter-tab.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

/* 系统导航样式 */
.system-navigation {
    padding: 40px 0;
    background-color: var(--light-color);
}

.system-nav-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 40px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.system-nav-btn {
    flex: 1;
    min-width: 300px;
    max-width: 480px;
    background-color: white;
    border: 3px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 40px 30px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.system-nav-btn:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    /* 悬停时不改变背景色 */
}

.system-nav-btn.active {
    border-color: var(--primary-color);
    background-color: white;
    box-shadow: var(--shadow);
    position: relative;
}

.system-nav-btn.active::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    border: 3px solid var(--primary-color);
    border-radius: calc(var(--border-radius) + 3px);
    pointer-events: none;
}

.system-nav-icon {
    width: 80px;
    height: 80px;
    background-color: #f0f0f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    color: #333;
    font-size: 2.2rem;
    transition: var(--transition);
}

.system-nav-btn.active .system-nav-icon {
    background: linear-gradient(135deg, var(--primary-color) 0%, #3a6bc4 100%);
    color: white;
}

.system-nav-btn:nth-child(2) .system-nav-icon {
    background-color: #f0f0f0;
}

.system-nav-btn h4 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.system-nav-btn p {
    color: var(--text-light);
    line-height: 1.6;
    font-size: 1rem;
    max-width: 400px;
    margin-bottom: 0;
}

/* 系统内容显示控制 */
.system-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.system-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 分类标题 */
.category-title {
    text-align: center;
    margin: 50px 0 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #f0f0f0;
}

.category-title h2 {
    font-size: 2.2rem;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.category-title p {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* 产品卡片网格 */
.products-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

/* 产品卡片 */
.product-card-item {
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-card-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

/* 卡片头部 */
.product-card-header {
    padding: 25px 25px 15px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--light-color);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.product-card-header h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 8px;
}

.product-card-category {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 12px;
}

/* 卡片图标 */
.product-card-icon {
    width: 60px;
    height: 60px;
    background-color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    color: var(--primary-color);
    font-size: 1.8rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* 卡片内容 */
.product-card-content {
    padding: 20px 25px;
    flex-grow: 1;
}

.product-card-description {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

/* 卡片功能列表 */
.product-card-features h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 8px;
}

.product-card-features ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.product-card-features li {
    padding: 8px 0;
    color: var(--text-light);
    position: relative;
    padding-left: 25px;
    font-size: 0.9rem;
}

.product-card-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
    font-size: 1.1rem;
}

/* 卡片底部 */
.product-card-footer {
    padding: 15px 25px 25px;
    border-top: 1px solid #f0f0f0;
    text-align: center;
}

.product-card-cta {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 10px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.product-card-cta:hover {
    transform: translateY(-2px);
}

/* 远程值班系统卡片 - 完全使用普通产品卡片的样式，没有任何特殊颜色 */
.duty-system-card {
    grid-column: 1 / -1;
    /* 完全使用普通卡片的样式 */
}

/* 底部按钮已删除，隐藏footer */
.duty-system-card .product-card-footer {
    display: none !important;
}





/* ==========================================================================
   远程值班系统详情页样式
   ========================================================================== */

.duty-system-details {
    background-color: var(--light-color);
    padding: 60px 0;
}

.duty-system-details .container {
    max-width: var(--container-width);
}

.duty-detail-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    max-width: calc(var(--container-width) - 2 * var(--container-padding));
    margin-left: auto;
    margin-right: auto;
}

.duty-detail-card h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 25px;
    text-align: center;
    position: relative;
}

.duty-detail-card h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
}

.duty-detail-section {
    margin-bottom: 30px;
}

.duty-detail-section h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.duty-detail-section h4 i {
    margin-right: 10px;
    font-size: 1.2rem;
}

.duty-detail-content {
    color: var(--text-light);
    line-height: 1.6;
}

.duty-detail-content p {
    margin-bottom: 15px;
}

.duty-detail-content ul {
    list-style: none;
    padding: 0;
}

.duty-detail-content li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.duty-detail-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1.5rem;
}

.duty-policy-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.duty-policy-item {
    background-color: var(--light-color);
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
}

.duty-policy-item h5 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.duty-policy-item p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.5;
}

.duty-benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.duty-benefit-item {
    text-align: center;
    padding: 25px;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.duty-benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.duty-benefit-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.duty-benefit-item h5 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.duty-benefit-item p {
    color: var(--text-light);
    line-height: 1.5;
    font-size: 0.9rem;
}

/* ==========================================================================
   解决方案页面样式
   ========================================================================== */

/* 优势展示 */
.our-advantages {
    padding: var(--spacing-xxl) 0;
    background-color: var(--light-color);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.advantage-item {
    background-color: white;
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.advantage-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 1.8rem;
}

.advantage-item h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.advantage-item p {
    color: var(--text-light);
    line-height: 1.6;
}

/* 场景部分 */
.scenario-section {
    padding: var(--spacing-xxl) 0;
}

.scenario-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.scenario-card {
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.scenario-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

/* 卡片悬停时的标头效果增强 */
.scenario-card:hover .scenario-header::before {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.25) 0%, rgba(255, 255, 255, 0.15) 100%);
}

.scenario-header {
    padding: 25px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #3a6bc4 100%);
    border-bottom: none;
    position: relative;
    overflow: hidden;
}

.scenario-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15) 0%, rgba(255, 255, 255, 0.05) 100%);
    z-index: 1;
}

.scenario-header h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: white;
    margin-bottom: 0;
    position: relative;
    z-index: 2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 不同场景卡片的配色方案 */
.scenario-card:nth-child(1) .scenario-header {
    background: linear-gradient(135deg, var(--scenario-color-1) 0%, #3a6bc4 100%);
}

.scenario-card:nth-child(2) .scenario-header {
    background: linear-gradient(135deg, var(--scenario-color-2) 0%, #3ba3a3 100%);
}

.scenario-card:nth-child(3) .scenario-header {
    background: linear-gradient(135deg, var(--scenario-color-3) 0%, #d48d3e 100%);
}

.scenario-card:nth-child(4) .scenario-header {
    background: linear-gradient(135deg, var(--scenario-color-4) 0%, #8e55c0 100%);
}

.scenario-card:nth-child(5) .scenario-header {
    background: linear-gradient(135deg, var(--scenario-color-5) 0%, #3e9292 100%);
}

.scenario-card:nth-child(6) .scenario-header {
    background: linear-gradient(135deg, var(--scenario-color-6) 0%, #6da348 100%);
}

.scenario-body {
    padding: 25px;
}

.scenario-body p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 20px;
}

.scenario-features h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.scenario-features ul {
    list-style: none;
    padding: 0;
}

.scenario-features li {
    padding: 8px 0;
    color: var(--text-light);
    position: relative;
    padding-left: 25px;
}

.scenario-features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1.5rem;
}

/* 全场景应用方案 */
.full-solution {
    padding: var(--spacing-xxl) 0;
    background-color: var(--light-color);
}

.full-solution-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.solution-category {
    background-color: white;
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.solution-category:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.solution-category h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.solution-category p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 0;
}

/* 选项卡样式 */
.features-tabs {
    padding: var(--spacing-xxl) 0;
}

.tabs-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 40px;
}

.tab-btn {
    padding: 12px 24px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-weight: 600;
    color: var(--dark-color);
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    background: rgba(45, 90, 160, 0.1);
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.solution-feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.solution-feature-item {
    background-color: var(--light-color);
    padding: 20px;
    border-radius: var(--border-radius);
}

.solution-feature-item h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.solution-feature-item p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 0;
}

/* ==========================================================================
   响应式设计
   ========================================================================== */

@media (max-width: 768px) {
    /* 通用响应式 */
    .container {
        padding: 0 15px;
    }
    
    .page-title {
        font-size: 2.2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    /* 导航响应式 */
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    /* 产品卡片响应式 */
    .products-card-grid,
    .advantages-grid,
    .scenario-cards,
    .full-solution-list,
    .duty-policy-list,
    .duty-benefits-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .product-card-item,
    .advantage-item,
    .scenario-card,
    .solution-category {
        margin-bottom: 20px;
    }
    
    .duty-system-card {
        grid-column: 1;
    }
    
    /* 远程值班系统详情响应式 */
    .duty-system-details {
        padding: 40px 0;
    }
    
    .duty-detail-card {
        padding: 25px;
    }
    
    /* 过滤标签响应式 */
    .filter-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .filter-tab {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
    
    /* 系统导航响应式 */
    .system-nav-tabs {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }
    
    .system-nav-btn {
        min-width: 280px;
        max-width: 100%;
        width: 100%;
        padding: 30px 20px;
    }
    
    .system-nav-icon {
        width: 70px;
        height: 70px;
        font-size: 1.8rem;
        margin-bottom: 20px;
    }
    
    .system-nav-btn h4 {
        font-size: 1.4rem;
    }
    
    .system-nav-btn p {
        font-size: 0.95rem;
    }
    
    /* 页脚响应式 */
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .contact-info li {
        justify-content: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    /* 选项卡响应式 */
    .tabs-nav {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
    
    /* 首页响应式 */
    /* 英雄区域响应式 */
    .hero .container {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-image {
        max-width: 100%;
        order: -1;
    }
    
    /* 核心优势区域响应式 */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card {
        padding: 25px;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
        margin-bottom: 20px;
    }
    
    /* 产品预览区域响应式 */
    .products-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .product-card {
        padding: 20px;
    }
    
    .product-image {
        width: 70px;
        height: 70px;
        font-size: 2rem;
        margin-bottom: 15px;
    }
    
    /* 解决方案预览区域响应式 */
    .solutions-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .solution-card {
        padding: 25px;
    }
    
    .solution-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
        margin-bottom: 20px;
    }
    
    /* 关于我们预览区域响应式 */
    .about-content {
        flex-direction: column;
        gap: 40px;
        text-align: center;
    }
    
    .about-image {
        max-width: 100%;
        order: -1;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .product-card-header,
    .product-card-content,
    .product-card-footer {
        padding: 20px;
    }
    
    .advantage-item,
    .scenario-card,
    .solution-category {
        padding: 20px;
    }
    
    /* 首页480px以下响应式 */
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-description {
        font-size: 0.95rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .feature-card,
    .product-card,
    .solution-card {
        padding: 20px;
    }
    
    .feature-icon,
    .solution-icon {
        width: 50px;
        height: 50px;
        font-size: 1.3rem;
        margin-bottom: 15px;
    }
    
    .product-image {
        width: 60px;
        height: 60px;
        font-size: 1.8rem;
    }
    
    .highlight-item {
        font-size: 0.95rem;
    }
}

/* 打印样式 */
@media print {
    .header,
    .hero-buttons,
    .footer,
    .mobile-menu-btn,
    .filter-tabs,
    .product-card-cta {
        display: none;
    }
    
    .page-header {
        padding: 50px 0;
        background: none;
        color: black;
    }
    
    .page-title {
        color: black;
    }
    
    .page-subtitle {
        color: black;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
    
    .section-title {
        font-size: 18pt;
    }
}