/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
    overflow-x: hidden;
}

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

/* 导航栏样式 */
.navbar {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 45px;
    width: auto;
    border-radius: 6px;
    background: transparent !important;
    background-color: transparent !important;
    box-shadow: none !important;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 600;
    color: #2c3e50;
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav-link {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 8px 0;
}

.nav-link:hover {
    color: #e74c3c;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #e74c3c, #f39c12);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    transition: 0.3s;
}

/* 主页横幅样式 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: url('images/背景图.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    position: relative;
    overflow: hidden;
}

/* 移动端背景图修复 */
@media (max-width: 768px) {
    .hero {
        background-attachment: scroll;
        background-size: cover;
        background-position: center center;
    }
}

/* iOS Safari 特殊处理 */
@supports (-webkit-touch-callout: none) {
    .hero {
        background-attachment: scroll;
    }
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    font-weight: 400;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-image {
    display: none;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
    min-width: 160px;
}

.btn-primary {
    background: linear-gradient(45deg, #e74c3c, #f39c12);
    color: white;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #333;
    transform: translateY(-2px);
}

/* 章节样式 */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 15px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #e74c3c, #f39c12);
    border-radius: 2px;
}

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

/* 关于我们样式 */
.about {
    background: #f8f9fa;
}

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

.about-text h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.about-text p {
    margin-bottom: 25px;
    color: #555;
    line-height: 1.7;
}

.stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 25px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

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

.stat-number {
    font-size: 2.2rem;
    font-weight: 700;
    color: #e74c3c;
    margin-bottom: 8px;
}

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

.about-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 活动网格样式 */
.activities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.activity-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
}

.activity-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.activity-image {
    height: 60%;
    overflow: hidden;
}

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

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

.activity-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.activity-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 12px;
}

.activity-description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.activity-meta {
    display: flex;
    gap: 15px;
    font-size: 0.9rem;
    color: #888;
}

/* 新闻网格样式 */
.news {
    background: #f8f9fa;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.news-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

.news-image {
    height: 50%;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.news-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.news-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    font-size: 0.85rem;
}

.news-date {
    color: #e74c3c;
    font-weight: 500;
}

.news-category {
    background: #f8f9fa;
    padding: 4px 12px;
    border-radius: 20px;
    color: #666;
}

.news-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-excerpt {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.news-link {
    color: #e74c3c;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
}

.news-link:hover {
    text-decoration: underline;
}

/* 组织架构样式 */
.organization {
    background: white;
}

.org-chart {
    max-width: 1000px;
    margin: 0 auto;
}

.org-level {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.org-card {
    background: white;
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    min-width: 200px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.org-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    border-color: #e74c3c;
}

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

.org-card h3 {
    font-size: 1.2rem;
    color: #2c3e50;
    margin-bottom: 10px;
    font-weight: 600;
}

.org-card p {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* 联系我们样式 */
.contact {
    background: #f8f9fa;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 50px;
    max-width: 800px;
    margin: 0 auto;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.contact-icon {
    font-size: 2rem;
    color: #e74c3c;
    min-width: 50px;
}

.contact-details h3 {
    font-size: 1.1rem;
    color: #2c3e50;
    margin-bottom: 5px;
    font-weight: 600;
}

.contact-details p {
    color: #666;
    line-height: 1.5;
}

/* 页脚样式 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 50px 0 30px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo-img {
    height: 40px;
    width: auto;
    border-radius: 6px;
    background: transparent !important;
    background-color: transparent !important;
    box-shadow: none !important;
}

.footer-logo-text {
    font-size: 1.3rem;
    font-weight: 600;
}

.footer-description {
    color: #bdc3c7;
    line-height: 1.6;
}

.footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    font-weight: 600;
}

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

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-contact {
    list-style: none;
}

.footer-contact li {
    margin-bottom: 12px;
    color: #bdc3c7;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

.footer-bottom a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-bottom a:hover {
    color: #e74c3c;
}

/* 法律声明样式 */
.footer-legal {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    text-align: center;
}

.legal-notice {
    max-width: 800px;
    margin: 0 auto;
}

.legal-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #ecf0f1;
    margin-bottom: 10px;
}

.legal-text {
    color: #bdc3c7;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 10px;
}

.legal-link {
    color: #3498db;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
}

.legal-link:hover {
    color: #5dade2;
    border-bottom-color: #5dade2;
}

.legal-warning {
    color: #e74c3c;
    font-weight: 600;
    font-size: 0.95rem;
    background: rgba(231, 76, 60, 0.1);
    padding: 8px 15px;
    border-radius: 5px;
    border: 1px solid rgba(231, 76, 60, 0.3);
    display: inline-block;
    margin-top: 5px;
}

/* CTA按钮样式 */
.activities-cta,
.news-cta {
    text-align: center;
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 导航栏移动端优化 */
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 50px;
        transition: left 0.3s ease;
        z-index: 999;
        box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-item {
        margin: 15px 0;
    }
    
    .nav-link {
        font-size: 1.2rem;
        padding: 15px 30px;
        border-radius: 25px;
        transition: all 0.3s ease;
        display: block;
        text-align: center;
        min-width: 200px;
    }
    
    .nav-link:hover {
        background: #f8f9fa;
        color: #e74c3c;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    /* Logo 移动端优化 */
    .logo-text {
        font-size: 1.1rem;
    }
    
    .logo-img {
        height: 35px;
    }
    
    /* 主页横幅移动端优化 */
    .hero {
        min-height: 80vh;
        padding: 100px 0 50px;
    }
    
    .hero-title {
        font-size: 2.2rem;
        line-height: 1.3;
        margin-bottom: 1rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 2rem;
        line-height: 1.5;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        padding: 12px 25px;
        font-size: 0.95rem;
    }
    
    /* 关于我们移动端优化 */
    .about-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .about-image {
        order: -1;
    }
    
    .about-image img {
        height: 250px;
    }
    
    .stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .stat-item {
        padding: 20px 15px;
    }
    
    .stat-number {
        font-size: 1.8rem;
    }
    
    /* 活动网格移动端优化 */
    .activities-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .activity-card {
        aspect-ratio: 1.2;
    }
    
    .activity-image {
        height: 55%;
    }
    
    .activity-content {
        padding: 15px;
    }
    
    .activity-title {
        font-size: 1.1rem;
    }
    
    .activity-meta {
        flex-direction: column;
        gap: 8px;
        font-size: 0.85rem;
    }
    
    /* 新闻网格移动端优化 */
    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .news-card {
        aspect-ratio: 1.2;
    }
    
    .news-image {
        height: 50%;
    }
    
    .news-content {
        padding: 15px;
    }
    
    .news-title {
        font-size: 1.1rem;
    }
    
    .news-meta {
        gap: 10px;
        font-size: 0.8rem;
    }
    
    /* 组织架构移动端优化 - 保持网页端的层级布局 */
    .org-level {
        display: flex;
        justify-content: center;
        gap: 15px;
        margin-bottom: 25px;
        flex-wrap: wrap;
    }
    
    /* 单个部门的层级居中显示 */
    .org-level-1,
    .org-level-2,
    .org-level-4 {
        justify-content: center;
    }
    
    /* 多个部门的层级保持横向排列 */
    .org-level-3,
    .org-level-5 {
        justify-content: center;
        flex-wrap: wrap;
        gap: 15px;
    }
    
    .org-card {
        min-width: 140px;
        max-width: 160px;
        padding: 15px 10px;
        flex: 0 0 auto;
    }
    
    .org-icon {
        font-size: 1.8rem;
        margin-bottom: 8px;
    }
    
    .org-card h3 {
        font-size: 0.95rem;
        margin-bottom: 6px;
    }
    
    .org-card p {
        font-size: 0.75rem;
        line-height: 1.3;
    }
    
    .org-icon {
        font-size: 2rem;
    }
    
    .org-card h3 {
        font-size: 1.1rem;
    }
    
    .org-card p {
        font-size: 0.85rem;
    }
    
    /* 联系我们移动端优化 */
    .contact-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .contact-item {
        padding: 20px;
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .contact-icon {
        font-size: 2.5rem;
    }
    
    /* 页脚移动端优化 */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .footer-contact li {
        justify-content: center;
        text-align: center;
    }
    
    /* 通用移动端优化 */
    .section-title {
        font-size: 1.8rem;
        margin-bottom: 10px;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    section {
        padding: 50px 0;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    /* CTA按钮移动端优化 */
    .activities-cta,
    .news-cta {
        margin-top: 30px;
    }
    
    .activities-cta .btn,
    .news-cta .btn {
        width: 100%;
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    /* 容器和间距优化 */
    .container {
        padding: 0 15px;
    }
    
    .nav-container {
        padding: 0 15px;
        height: 60px;
    }
    
    /* Logo 小屏幕优化 */
    .logo-text {
        font-size: 1.1rem;
        /* 保持文字显示，不隐藏 */
    }
    
    .logo-img {
        height: 30px;
    }
    
    /* 导航菜单小屏幕优化 */
    .nav-menu {
        top: 60px;
        height: calc(100vh - 60px);
        padding-top: 30px;
    }
    
    .nav-link {
        font-size: 1.1rem;
        padding: 12px 25px;
        min-width: 180px;
    }
    
    /* 主页横幅小屏幕优化 */
    .hero {
        min-height: 70vh;
        padding: 80px 0 40px;
    }
    
    .hero-title {
        font-size: 1.8rem;
        line-height: 1.2;
        margin-bottom: 0.8rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
        margin-bottom: 1.5rem;
    }
    
    .hero-buttons {
        gap: 12px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
        min-width: 200px;
        max-width: 250px;
    }
    
    /* 统计数据小屏幕优化 */
    .stats {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .stat-item {
        padding: 15px 10px;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .stat-label {
        font-size: 0.85rem;
    }
    
    /* 卡片内容小屏幕优化 */
    .activity-card,
    .news-card {
        aspect-ratio: 1.1;
    }
    
    .activity-content,
    .news-content {
        padding: 12px;
    }
    
    .activity-title,
    .news-title {
        font-size: 1rem;
        margin-bottom: 8px;
    }
    
    .activity-description,
    .news-excerpt {
        font-size: 0.85rem;
        line-height: 1.4;
    }
    
    /* 组织架构小屏幕优化 */
    .org-card {
        min-width: 200px;
        padding: 15px;
    }
    
    .org-icon {
        font-size: 1.8rem;
        margin-bottom: 10px;
    }
    
    .org-card h3 {
        font-size: 1rem;
        margin-bottom: 8px;
    }
    
    .org-card p {
        font-size: 0.8rem;
    }
    
    /* 联系信息小屏幕优化 */
    .contact-item {
        padding: 15px;
        gap: 12px;
    }
    
    .contact-icon {
        font-size: 2rem;
    }
    
    .contact-details h3 {
        font-size: 1rem;
    }
    
    .contact-details p {
        font-size: 0.85rem;
    }
    
    /* 页面标题小屏幕优化 */
    .section-title {
        font-size: 1.5rem;
    }
    
    .section-subtitle {
        font-size: 0.9rem;
    }
    
    section {
        padding: 40px 0;
    }
    
    .section-header {
        margin-bottom: 30px;
    }
    
    /* 页脚小屏幕优化 */
    .footer {
        padding: 40px 0 20px;
    }
    
    .footer-content {
        gap: 25px;
    }
    
    .footer-logo-text {
        font-size: 1.1rem;
    }
    
    .footer-section h3 {
        font-size: 1.1rem;
        margin-bottom: 15px;
    }
    
    .footer-links li,
    .footer-contact li {
        margin-bottom: 8px;
        font-size: 0.9rem;
    }
    
    .footer-bottom {
        padding-top: 20px;
        font-size: 0.85rem;
    }
    
    /* 按钮和链接小屏幕优化 */
    .activities-cta .btn,
    .news-cta .btn {
        max-width: 250px;
        font-size: 0.9rem;
    }
}

/* 超小屏幕优化 (320px以下) */
@media (max-width: 320px) {
    .container {
        padding: 0 10px;
    }
    
    .nav-container {
        padding: 0 10px;
    }
    
    .hero-title {
        font-size: 1.6rem;
    }
    
    .hero-subtitle {
        font-size: 0.85rem;
    }
    
    .btn {
        min-width: 180px;
        padding: 8px 16px;
        font-size: 0.85rem;
    }
    
    .section-title {
        font-size: 1.3rem;
    }
    
    .org-card {
        min-width: 180px;
        padding: 12px;
    }
    
    .contact-item {
        padding: 12px;
    }
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 40px;
    color: #666;
}

/* 隐藏元素 */
.org-details {
    margin-top: 40px;
}

.back-btn {
    background: #e74c3c;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9rem;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.back-btn:hover {
    background: #c0392b;
    transform: translateY(-2px);
}

.back-icon {
    margin-right: 8px;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 焦点样式 */
*:focus {
    outline: 2px solid #e74c3c;
    outline-offset: 2px;
}

/* 页面标题样式 */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 80px 0 60px;
    text-align: center;
    color: white;
    position: relative;
}

.page-header.department-header-section {
    padding: 60px 0 40px;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
}

.page-header .container {
    position: relative;
    z-index: 2;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.page-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* 项目页面样式 */
.projects-section {
    padding: 80px 0;
    background: #f8f9fa;
}

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

.project-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.project-card.featured {
    grid-column: span 1;
}

.project-image {
    height: 50%;
    position: relative;
    overflow: hidden;
}

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

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

.project-overlay {
    position: absolute;
    top: 15px;
    right: 15px;
}

.project-status {
    background: rgba(231, 76, 60, 0.9);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.project-category {
    background: #e74c3c;
    color: white;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    display: inline-block;
    margin-bottom: 15px;
}

.project-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 12px;
    line-height: 1.3;
}

.project-description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.project-stats {
    display: flex;
    gap: 30px;
    margin-bottom: 20px;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: #e74c3c;
    display: block;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
}

.project-progress {
    margin-top: 20px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #f0f0f0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #e74c3c, #f39c12);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 0.9rem;
    color: #666;
}

/* 项目统计样式 */
.project-stats-section {
    padding: 80px 0;
    background: white;
}

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

.stat-card {
    text-align: center;
    padding: 40px 20px;
    background: #f8f9fa;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    background: white;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.stat-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    display: block;
}

.stat-card .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #e74c3c;
    margin-bottom: 10px;
    display: block;
}

.stat-card .stat-label {
    font-size: 1.1rem;
    color: #666;
    font-weight: 500;
}

/* 新闻页面样式 */
.news-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.news-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.news-item {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.news-item.featured {
    border: 2px solid #e74c3c;
}

.news-image {
    height: 50%;
    position: relative;
    overflow: hidden;
}

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

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

.news-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background: #e74c3c;
    color: white;
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.news-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.news-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.news-date {
    color: #e74c3c;
    font-weight: 500;
}

.news-category {
    background: #f0f0f0;
    padding: 4px 10px;
    border-radius: 12px;
    color: #666;
}

.news-views {
    color: #888;
}

.news-item .news-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-excerpt {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.news-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tag {
    background: #e74c3c;
    color: white;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    align-items: center;
}

.page-btn {
    padding: 10px 15px;
    border: 1px solid #ddd;
    background: white;
    color: #666;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.page-btn:hover {
    background: #e74c3c;
    color: white;
    border-color: #e74c3c;
}

.page-btn.active {
    background: #e74c3c;
    color: white;
    border-color: #e74c3c;
}

.page-dots {
    color: #666;
    padding: 0 10px;
}

/* 响应式设计 - 项目和新闻页面 */
@media (max-width: 768px) {
    .page-title {
        font-size: 2.2rem;
    }
    
    .page-subtitle {
        font-size: 1rem;
    }
    
    .project-card.featured {
        grid-column: span 1;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-item {
        flex-direction: column;
        gap: 0;
    }
    
    .news-image {
        width: 100%;
        height: 200px;
    }
    
    .news-meta {
        gap: 15px;
    }
    
    .pagination {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: 100px 0 60px;
    }
    
    .page-title {
        font-size: 1.8rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .project-stats {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .news-tags {
        justify-content: center;
    }
}