/* ========================================
   企业官网 - 主样式文件
   简约现代风格 / SEO友好 / 响应式设计
   ======================================== */

/* === CSS变量 === */
:root {
    /* 主色调 */
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;

    /* 辅助色 */
    --secondary-color: #0ea5e9;
    --accent-color: #f59e0b;

    /* 中性色 */
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;

    /* 语义色 */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
    --font-size-base: 16px;
    --line-height: 1.6;

    /* 容器 */
    --container-max: 1200px;
    --header-height: 70px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--text-primary);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding-top: var(--header-height);
}

/* === 排版 === */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p { margin-bottom: var(--spacing-sm); }

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary-dark);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol { list-style: none; }

/* === 通用组件 === */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: 1.125rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: #0284c7;
    transform: translateY(-1px);
}

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

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

.btn-block {
    width: 100%;
}

/* === 导航栏 === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding-top: 15px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 40px;
    width: auto;
    display: block;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* 搜索框 */
.search-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.search-input {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 0.875rem;
    width: 200px;
    transition: all 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.375rem;
    transition: all 0.2s ease;
}

.search-btn:hover {
    color: var(--primary-color);
    background-color: var(--bg-light);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-secondary);
    transition: all 0.3s ease;
}

/* === 面包屑 === */
.breadcrumb {
    padding: var(--spacing-md) 0;
    background-color: var(--bg-light);
}

.breadcrumb .container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.breadcrumb a {
    color: var(--text-secondary);
}

.breadcrumb a:hover {
    color: var(--primary-color);
}

.breadcrumb-separator {
    color: var(--text-muted);
}

.breadcrumb-current {
    color: var(--text-primary);
    font-weight: 500;
}

/* === 页面标题 === */
.page-header {
    padding: var(--spacing-xl) 0;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-color) 100%);
    color: white;
}

.page-header h1 {
    color: white;
    margin-bottom: var(--spacing-xs);
}

.page-header p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
}

/* === 轮播区域 === */
.hero-slider {
    position: relative;
    height: 600px;
    overflow: hidden;
    margin-top: calc(-1 * var(--header-height));
    margin-bottom: var(--spacing-xl);
}

.slider-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.slide.active {
    opacity: 1;
}

/* Carousel slide backgrounds */
.slide:nth-child(1) {
    background-image: url('../images/carousel-1.jpg');
}

.slide:nth-child(2) {
    background-image: url('../images/carousel-2.jpg');
}

.slide:nth-child(3) {
    background-image: url('../images/carousel-3.jpg');
}

.slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.8) 0%, rgba(14, 165, 233, 0.6) 100%);
}

.slide-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    text-align: center;
    color: white;
    padding: 0 var(--spacing-md);
}

.slide-content h1 {
    font-size: 3rem;
    color: white;
    margin-bottom: var(--spacing-sm);
    animation: slideUp 0.8s ease;
}

.slide-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    animation: slideUp 0.8s ease 0.2s backwards;
}

.slide-content .btn {
    animation: slideUp 0.8s ease 0.4s backwards;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slider-nav {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    z-index: 2;
}

.slider-prev,
.slider-next {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all 0.3s ease;
}

.slider-prev:hover,
.slider-next:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.slider-dots {
    display: flex;
    gap: 0.5rem;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.4);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.slider-dot.active {
    background-color: white;
    transform: scale(1.2);
}

/* === 核心服务 === */
.services {
    padding: var(--spacing-2xl) 0;
    background-color: var(--bg-white);
}

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

.service-card {
    display: block;
    padding: var(--spacing-lg);
    background-color: var(--bg-white);
    border-radius: 1rem;
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
    text-align: center;
    text-decoration: none;
    color: inherit;
}

.service-card h3 {
    margin-bottom: var(--spacing-xs);
}

.service-card p {
    color: var(--text-secondary);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.service-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-color) 100%);
    border-radius: 1rem;
    color: white;
    margin: 0 auto var(--spacing-md);
}

.service-icon svg {
    width: 32px;
    height: 32px;
    display: block;
}

.service-card h3 {
    margin-bottom: var(--spacing-xs);
}

.service-card p {
    color: var(--text-secondary);
}

/* === 关于我们预览 === */
.about-preview {
    padding: var(--spacing-2xl) 0;
    background-color: var(--bg-light);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-image img {
    width: 100%;
    border-radius: 1rem;
    box-shadow: var(--shadow-xl);
}

.about-content h2 {
    margin-bottom: var(--spacing-md);
}

.about-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.about-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.about-stats li {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* === 最新动态 === */
.news {
    padding: var(--spacing-2xl) 0;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.news-card {
    background-color: var(--bg-white);
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

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

.news-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.news-category {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-color);
    color: white;
    font-size: 0.75rem;
    border-radius: 0.25rem;
}

.news-content {
    padding: var(--spacing-md);
}

.news-content h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.news-content h3 a {
    color: var(--text-primary);
}

.news-content h3 a:hover {
    color: var(--primary-color);
}

.news-excerpt {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.section-cta {
    text-align: center;
}

/* === 合作伙伴 === */
.partners {
    padding: var(--spacing-2xl) 0;
    background-color: var(--bg-light);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
    align-items: center;
}

.partner-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    background-color: var(--bg-white);
    border-radius: 0.5rem;
    color: var(--text-muted);
    transition: all 0.3s ease;
}

.partner-logo:hover {
    color: var(--primary-color);
    transform: scale(1.05);
}

/* === 栏目页 === */
.category-page {
    padding: var(--spacing-xl) 0;
}

.page-title {
    text-align: center;
    margin-bottom: var(--spacing-xs);
}

.page-description {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.category-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: var(--spacing-xl);
}

.category-layout > .sidebar {
    order: 2;
}

.category-layout > .article-list {
    order: 1;
}

/* 侧边栏 */
.sidebar {
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-md));
    height: fit-content;
}

.sidebar-section {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-radius: 0.5rem;
}

.sidebar-title {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sidebar-menu a {
    padding: 0.5rem 0.75rem;
    color: var(--text-secondary);
    border-radius: 0.25rem;
    transition: all 0.2s ease;
}

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

.filter-list label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
    cursor: pointer;
}

.filter-list input[type="checkbox"] {
    accent-color: var(--primary-color);
}

/* 热门文章 */
.hot-articles {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.hot-articles li {
    border-bottom: 1px solid var(--border-light);
}

.hot-articles li:last-child {
    border-bottom: none;
}

.hot-articles a {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-sm) 0;
    gap: 0.25rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.hot-articles a:hover {
    color: var(--primary-color);
}

.hot-article-title {
    font-size: 0.875rem;
    line-height: 1.4;
}

.hot-article-views {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    padding: 0.25rem 0.75rem;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.tag:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 文章列表 */
.article-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.article-item {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-white);
    border-radius: 1rem;
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

.article-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.article-image {
    border-radius: 0.5rem;
    overflow: hidden;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-content {
    display: flex;
    flex-direction: column;
}

.article-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-color);
    color: white;
    font-size: 0.75rem;
    border-radius: 0.25rem;
    margin-bottom: var(--spacing-xs);
    align-self: flex-start;
}

.article-content h2 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.article-content h2 a {
    color: var(--text-primary);
}

.article-content h2 a:hover {
    color: var(--primary-color);
}

.article-excerpt {
    color: var(--text-secondary);
    flex-grow: 1;
}

.article-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* 分页 */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.pagination-link {
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 1rem;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: pointer;
}

.pagination-link:hover {
    background-color: var(--primary-light);
    color: white;
    border-color: var(--primary-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.pagination-link.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    font-weight: 600;
    cursor: default;
}

.pagination-link.active:hover {
    transform: none;
    box-shadow: none;
}

.pagination-prev,
.pagination-next {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0 1.25rem;
}

.pagination-prev:hover,
.pagination-next:hover {
    transform: translateY(-1px);
}

.pagination-info {
    padding: 0 1rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.pagination-numbers {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pagination-ellipsis {
    color: var(--text-muted);
    padding: 0 0.25rem;
    font-weight: 500;
}

/* === 文章页 === */
.article-page {
    padding: var(--spacing-xl) 0;
}

.article-main {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.article-detail {
    /* 移除max-width限制，让article填充容器 */
}

.article-header {
    margin-bottom: var(--spacing-lg);
}

.article-header .article-category {
    margin-bottom: var(--spacing-sm);
}

.article-header h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.meta-author,
.meta-date,
.meta-views {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.article-feature-image {
    margin-bottom: var(--spacing-xl);
}

.article-feature-image img {
    width: 100%;
    border-radius: 1rem;
}

.article-feature-image figcaption {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.article-body {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.article-lead {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.article-body h2 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.article-body ul,
.article-body ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
}

.article-body li {
    margin-bottom: 0.5rem;
}

.article-body blockquote {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    border-left: 4px solid var(--primary-color);
    background-color: var(--bg-light);
    font-style: italic;
}

.article-body blockquote cite {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* 文章页脚 */
.article-footer {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
}

.article-share h3 {
    margin-bottom: var(--spacing-sm);
}

.share-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.share-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.article-navigation {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
}

.nav-link {
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.nav-link:hover {
    background-color: var(--primary-color);
    color: white;
}

.nav-link:hover .nav-label,
.nav-link:hover .nav-title {
    color: white;
}

.nav-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.nav-title {
    display: block;
    color: var(--text-primary);
}

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

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

/* 相关文章 */
.related-articles {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-light);
}

.related-articles h3 {
    margin-bottom: var(--spacing-md);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.related-card {
    display: block;
}

.related-card img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 0.5rem;
    margin-bottom: var(--spacing-xs);
}

.related-card h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.related-card time {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* === 关于我们页 === */
.about-intro {
    padding: var(--spacing-xl) 0;
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.intro-content h2 {
    margin-bottom: var(--spacing-md);
}

.intro-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.culture {
    padding: var(--spacing-2xl) 0;
    background-color: var(--bg-light);
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.culture-card {
    padding: var(--spacing-lg);
    background-color: var(--bg-white);
    border-radius: 1rem;
    text-align: center;
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

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

.culture-icon {
    display: inline-flex;
    width: 80px;
    height: 80px;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-color) 100%);
    border-radius: 50%;
    color: white;
    margin-bottom: var(--spacing-md);
}

.culture-card h3 {
    margin-bottom: var(--spacing-sm);
}

.culture-card p {
    color: var(--text-secondary);
}

.stats-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
    text-align: center;
}

.stats-section .stat-number {
    color: white;
    font-size: 2.5rem;
}

.stats-section .stat-label {
    color: rgba(255, 255, 255, 0.9);
}

.team {
    padding: var(--spacing-2xl) 0;
}

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

.team-card {
    background-color: var(--bg-white);
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

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

.team-image img {
    width: 100%;
    height: 280px;
    object-fit: cover;
}

.team-info {
    padding: var(--spacing-md);
    text-align: center;
}

.team-info h3 {
    margin-bottom: 0.25rem;
}

.team-title {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.team-bio {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.team-social {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.team-social a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-light);
    border-radius: 50%;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.team-social a:hover {
    background-color: var(--primary-color);
    color: white;
}

/* 时间线 */
.timeline-section {
    padding: var(--spacing-2xl) 0;
    background-color: var(--bg-light);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    padding-bottom: var(--spacing-xl);
}

.timeline-marker {
    position: absolute;
    left: 12px;
    top: 0;
    width: 18px;
    height: 18px;
    background-color: var(--primary-color);
    border: 3px solid white;
    border-radius: 50%;
    box-shadow: 0 0 0 2px var(--primary-color);
}

.timeline-content {
    padding: var(--spacing-md);
    background-color: var(--bg-white);
    border-radius: 0.5rem;
    border: 1px solid var(--border-light);
}

.timeline-year {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-color);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 1rem;
    margin-bottom: var(--spacing-xs);
}

.timeline-content h3 {
    margin-bottom: var(--spacing-xs);
}

.timeline-content p {
    color: var(--text-secondary);
    margin: 0;
}

/* === 联系我们页 === */
.contact-content {
    padding: var(--spacing-xl) 0;
}

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.contact-form-section,
.contact-info-section {
    padding: var(--spacing-lg);
    background-color: var(--bg-white);
    border-radius: 1rem;
    border: 1px solid var(--border-light);
}

.contact-form-section h2,
.contact-info-section h2 {
    margin-bottom: var(--spacing-md);
}

/* 表单 */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.required {
    color: var(--error);
}

.form-group input,
.form-group textarea {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* 联系信息 */
.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-info-item {
    display: flex;
    gap: var(--spacing-md);
}

.contact-info-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-light);
    border-radius: 0.5rem;
    color: var(--primary-color);
}

.contact-info-content h3 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.contact-info-content p {
    color: var(--text-secondary);
    margin: 0;
}

.contact-map {
    border-radius: 0.5rem;
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.contact-map iframe {
    display: block;
}

.contact-hours {
    background-color: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: 0.5rem;
}

.contact-hours h3 {
    margin-bottom: var(--spacing-sm);
}

.hours-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-light);
}

.hours-item:last-child {
    border-bottom: none;
}

.hours-day {
    color: var(--text-primary);
}

.hours-time {
    color: var(--text-secondary);
}

/* 社交媒体 */
.social-section {
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.social-section h2 {
    margin-bottom: var(--spacing-xs);
}

.social-section p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.social-links-large {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.social-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background-color: var(--bg-white);
    border-radius: 1rem;
    border: 1px solid var(--border-light);
    min-width: 120px;
    transition: all 0.3s ease;
}

.social-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.social-card:hover svg {
    color: var(--primary-color);
}

/* FAQ */
.faq-section {
    padding: var(--spacing-xl) 0 var(--spacing-2xl);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border-light);
    border-radius: 0.5rem;
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--bg-white);
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.faq-question:hover {
    background-color: var(--bg-light);
}

.faq-icon {
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--text-secondary);
    margin: 0;
}

/* === 页脚 === */
.footer {
    background-color: #1f2937;
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-sm);
}

.footer-links,
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-links a,
.footer-contact li {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: white;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-time {
    font-size: 1.125rem;
    font-weight: 600;
    color: white;
}

.social-links {
    display: flex;
    gap: 0.75rem;
    margin-top: var(--spacing-md);
}

.social-links a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all 0.2s ease;
}

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

/* 微信二维码弹出 */
.social-wechat {
    position: relative;
}

.qrcode-popup {
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) scale(0);
    width: 150px;
    padding: 10px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.qrcode-popup::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: white;
}

.qrcode-popup img {
    width: 100%;
    height: auto;
    display: block;
}

.social-wechat:hover .qrcode-popup {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) scale(1);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom p {
    margin: 0;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-bottom a:hover {
    color: #ffffff;
    text-decoration: underline;
}

/* === 返回顶部 === */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
}

/* === 响应式设计 === */
@media (max-width: 992px) {
    .about-grid,
    .intro-grid,
    .contact-layout {
        grid-template-columns: 1fr;
    }

    .category-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

    .article-item {
        grid-template-columns: 1fr;
    }

    .article-image {
        height: 200px;
    }

    .slide-content h1 {
        font-size: 2rem;
    }

    .hero-slider {
        height: 500px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: 0;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-menu a {
        display: block;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--border-light);
    }

    .mobile-toggle {
        display: flex;
    }

    .search-input {
        display: none;
    }

    .search-btn {
        display: none;
    }

    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .slide-content h1 {
        font-size: 1.5rem;
    }

    .slide-subtitle {
        font-size: 1rem;
    }

    .hero-slider {
        height: 400px;
    }

    .slider-nav {
        bottom: var(--spacing-md);
    }

    .slider-prev,
    .slider-next {
        width: 40px;
        height: 40px;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

    .about-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .article-navigation {
        grid-template-columns: 1fr;
    }

    .nav-divider {
        display: none;
    }

    .pagination {
        gap: 0.25rem;
    }

    .pagination-info {
        display: none;
    }

    .pagination-link {
        min-width: 36px;
        height: 36px;
        padding: 0 0.75rem;
        font-size: 0.875rem;
    }

    .pagination-prev,
    .pagination-next {
        padding: 0 0.75rem;
    }

    .pagination-prev svg,
    .pagination-next svg {
        width: 14px;
        height: 14px;
    }

    .pagination-numbers {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.25rem;
    }

    .pagination-ellipsis {
        display: none;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .section-title {
        font-size: 1.5rem;
    }

    .slide-content h1 {
        font-size: 1.25rem;
    }

    .hero-slider {
        height: 300px;
    }

    .services-grid,
    .news-grid,
    .partners-grid {
        grid-template-columns: 1fr;
    }

    .back-to-top {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        width: 40px;
        height: 40px;
    }
}