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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* 顶部导航栏样式 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

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

.logo {
    width: 50px;
    height: 50px;
    margin-right: 15px;
    border-radius: 50%;
}

.logo-text h1 {
    font-size: 1.5rem;
    color: #0056b3;
    margin-bottom: 5px;
}

.logo-text p {
    font-size: 0.9rem;
    color: #666;
    font-style: italic;
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin-right: 20px;
}

.nav-item {
    margin-left: 25px;
}

.nav-item a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-item a:hover,
.nav-item.active a {
    color: #0056b3;
}

.nav-item.active a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: #0056b3;
}

.lang-btn {
    background: none;
    border: 1px solid #0056b3;
    color: #0056b3;
    padding: 5px 15px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s;
}

.lang-btn:hover {
    background-color: #0056b3;
    color: white;
}

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    color: #0056b3;
    cursor: pointer;
}

/* 大图横幅轮播样式 */
.hero {
    height: 600px;
    position: relative;
    margin-top: 80px;
    overflow: hidden;
}

.carousel {
    position: relative;
    width: 100%;
    height: 100%;
}

.carousel-inner {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.carousel-item.active {
    opacity: 1;
}

.carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.carousel-caption {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
    padding: 0 20px;
    background-color: rgba(0, 86, 179, 0.6);
}

.carousel-caption h2 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.carousel-caption p {
    font-size: 1.5rem;
    max-width: 800px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background-color: rgba(0, 86, 179, 0.7);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    transition: background-color 0.3s;
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
}

.carousel-control:hover {
    background-color: rgba(0, 86, 179, 0.9);
}

.carousel-control.prev {
    left: 20px;
}

.carousel-control.next {
    right: 20px;
}

.carousel-indicators {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

.indicator.active {
    background-color: white;
}

/* 新闻滚动区域样式 */
.news-ticker {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 10px 0;
    z-index: 5;
}

.news-ticker-container {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 40px;
}

.news-ticker-content {
    display: flex;
    position: absolute;
    white-space: nowrap;
    will-change: transform;
}

.news-item-ticker {
    display: inline-flex;
    align-items: center;
    padding: 0 50px;
    font-size: 0.9rem;
}

.news-item-ticker i {
    margin-right: 8px;
    color: #ffd700;
}

.news-item-ticker strong {
    margin-right: 8px;
    color: #ffd700;
}

/* 主要内容区域样式 */
.main-content {
    padding: 60px 0;
}

/* 科研前沿模块样式 */
.research-frontier {
    margin-bottom: 80px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    border-bottom: 2px solid #0056b3;
    padding-bottom: 15px;
}

.section-header h2 {
    color: #0056b3;
    font-size: 2rem;
}

.section-header p {
    color: #666;
    font-style: italic;
}

.more-btn {
    background-color: #0056b3;
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    text-decoration: none;
    transition: background-color 0.3s;
}

.more-btn:hover {
    background-color: #004494;
}

.tabs-container {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.tabs-nav {
    display: flex;
    background-color: #f1f5f9;
    border-bottom: 1px solid #e2e8f0;
}

.tab-btn {
    flex: 1;
    padding: 15px 20px;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 500;
    color: #64748b;
    cursor: pointer;
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
}

.tab-btn.active {
    color: #0056b3;
    background-color: white;
    border-bottom-color: #0056b3;
}

.tab-btn:hover {
    color: #0056b3;
}

.tabs-content {
    padding: 30px;
}

.tab-pane {
    display: none;
}

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

.news-item {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e2e8f0;
}

.news-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.news-date {
    color: #0056b3;
    font-weight: 600;
    margin-bottom: 10px;
}

.news-item h3 {
    margin-bottom: 15px;
    color: #333;
}

.news-item p {
    margin-bottom: 15px;
    color: #555;
}

.news-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 15px 0;
}

.read-more {
    color: #0056b3;
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    transition: color 0.3s;
}

.read-more:hover {
    color: #004494;
}

.read-more::after {
    content: ' →';
    margin-left: 5px;
}

/* 新闻动态样式 */
.news-section {
    margin-bottom: 80px;
}

.news-section h2 {
    color: #0056b3;
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
}

.news-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.news-card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 25px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.news-card .news-date {
    color: #0056b3;
    font-weight: 600;
    margin-bottom: 10px;
}

.news-card h3 {
    margin-bottom: 15px;
    color: #333;
}

.news-card p {
    margin-bottom: 15px;
    color: #555;
}

/* 研究方向样式 */
.research-section {
    margin-bottom: 80px;
}

.research-section h2 {
    color: #0056b3;
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
}

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

.research-card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 30px 25px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.research-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.research-icon {
    width: 70px;
    height: 70px;
    background-color: #e6f0fd;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 20px;
}

.research-icon i {
    font-size: 2rem;
    color: #0056b3;
}

.research-card h3 {
    margin-bottom: 15px;
    color: #333;
}

.research-card p {
    margin-bottom: 20px;
    color: #555;
}

/* 发表论文样式 */
.publications-section {
    margin-bottom: 80px;
}

.publications-section h2 {
    color: #0056b3;
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
}

.publications-list {
    margin-bottom: 30px;
}

/* 代表性论文与专利左右两列布局 */
.publications-patents-section {
    margin-bottom: 60px;
}

.publications-patents-container {
    display: flex;
    gap: 40px;
    margin-top: 30px;
}

.publications-column,
.patents-column {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.publications-column h2,
.patents-column h2 {
    color: #0056b3;
    font-size: 24px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #0056b3;
}

.publications-list,
.patents-list {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.publication-card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 25px;
    margin-bottom: 20px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.publication-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.publication-card h3 {
    margin-bottom: 10px;
}

.publication-card h3 a {
    color: #0056b3;
    text-decoration: none;
    transition: color 0.3s;
}

.publication-card h3 a:hover {
    color: #004494;
    text-decoration: underline;
}

.authors {
    margin-bottom: 5px;
    color: #555;
}

.journal {
    margin-bottom: 15px;
    color: #666;
    font-style: italic;
}

.abstract {
    color: #555;
}

/* 加入我们样式 */
.join-section {
    margin-bottom: 80px;
}

.join-section h2 {
    color: #0056b3;
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
}

.join-content {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 40px;
}

.professor-info {
    display: flex;
    align-items: center;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid #e2e8f0;
}

.professor-photo {
    width: 200px;
    height: 200px;
    border-radius: 8px;
    margin-right: 30px;
    object-fit: cover;
}

.professor-details h3 {
    color: #0056b3;
    margin-bottom: 10px;
}

.professor-details p {
    margin-bottom: 8px;
    color: #555;
}

.professor-details i {
    color: #0056b3;
    margin-right: 8px;
}

.recruitment-info h3 {
    color: #0056b3;
    margin-bottom: 15px;
}

.recruitment-info p {
    margin-bottom: 15px;
    color: #555;
}

.recruitment-info ul {
    margin-bottom: 20px;
    padding-left: 20px;
}

.recruitment-info li {
    margin-bottom: 8px;
    color: #555;
}

.contact-info {
    margin-bottom: 30px;
}

.contact-info p {
    margin-bottom: 8px;
    color: #555;
}

.contact-info i {
    color: #0056b3;
    margin-right: 8px;
}

.cta-button {
    display: inline-block;
    background-color: #0056b3;
    color: white;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s;
}

.cta-button:hover {
    background-color: #004494;
}

/* 团队成员分类下拉列表样式 */
.team-filter {
    margin-bottom: 30px;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.filter-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.filter-container label {
    font-weight: 600;
    color: #333;
}

.team-dropdown {
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #fff;
    font-size: 16px;
    min-width: 200px;
    cursor: pointer;
    transition: border-color 0.3s;
}

.team-dropdown:focus {
    outline: none;
    border-color: #0056b3;
    box-shadow: 0 0 0 2px rgba(0, 86, 179, 0.2);
}

/* 导航栏下拉菜单样式 */
.nav-item.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
}

.dropdown-toggle::after {
    content: '';
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 0.5rem;
    vertical-align: middle;
    border-top: 0.3rem solid;
    border-right: 0.3rem solid transparent;
    border-bottom: 0;
    border-left: 0.3rem solid transparent;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    display: none;
    min-width: 10rem;
    padding: 0.5rem 0;
    margin: 0.125rem 0 0;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid rgba(0, 0, 0, 0.15);
    border-radius: 0.25rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.175);
}

.nav-item.dropdown:hover .dropdown-menu {
    display: block;
}

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

.dropdown-menu li a {
    display: block;
    width: 100%;
    padding: 0.5rem 1rem;
    clear: both;
    font-weight: 400;
    color: #333;
    text-align: inherit;
    white-space: nowrap;
    background-color: transparent;
    border: 0;
    transition: all 0.3s ease;
}

.dropdown-menu li a:hover {
    color: #0056b3;
    background-color: #f8f9fa;
    text-decoration: none;
}

/* 团队页面样式 */
.team-section {
    margin-bottom: 60px;
}

.team-section h2 {
    color: #0056b3;
    font-size: 2.2rem;
    margin-bottom: 40px;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.team-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: #0056b3;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 30px;
    margin-bottom: 20px;
}

.team-member {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}

.team-member:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}

.member-photo {
    height: 380px;
    width: 240px;
    margin: 0 auto;
    overflow: hidden;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.member-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    transition: transform 0.3s ease;
    border-radius: 8px;
}

.team-member:hover .member-photo img {
    transform: scale(1.05);
}

.member-info {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.member-info h3 {
    color: #0056b3;
    font-size: 1.5rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.member-title {
    color: #0056b3;
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 5px;
}

.member-position {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 15px;
    font-style: italic;
}

.member-contact,
.member-bio,
.member-research,
.member-achievements {
    margin-bottom: 15px;
}

.member-contact p,
.member-bio p,
.member-research p {
    margin-bottom: 8px;
    color: #555;
    font-size: 0.95rem;
}

.member-contact i {
    color: #0056b3;
    margin-right: 8px;
    width: 16px;
}

.member-research h4,
.member-achievements h4 {
    color: #333;
    font-size: 1.1rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.member-achievements ul {
    padding-left: 20px;
    margin-bottom: 0;
}

.member-achievements li {
    margin-bottom: 6px;
    color: #555;
    font-size: 0.95rem;
}

/* 已毕业成员样式 */
.alumni-section {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 30px;
}

.alumni-category {
    margin-bottom: 30px;
}

.alumni-category:last-child {
    margin-bottom: 0;
}

.alumni-category h3 {
    color: #0056b3;
    font-size: 1.4rem;
    margin-bottom: 15px;
    padding-bottom: 8px;
    border-bottom: 2px solid #eaeaea;
}

.alumni-list {
    list-style-type: none;
    padding-left: 0;
}

.alumni-list li {
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px dashed #eaeaea;
    color: #555;
    font-size: 0.95rem;
    line-height: 1.6;
}

.alumni-list li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.alumni-list li strong {
    color: #0056b3;
    font-weight: 600;
}

/* 实验室合照样式 */
.lab-photo-container {
    margin-bottom: 40px;
}

.lab-photo-description {
    text-align: center;
    margin-bottom: 30px;
    padding: 0 20px;
}

.lab-photo-description p {
    font-size: 1.1rem;
    color: #555;
    max-width: 800px;
    margin: 0 auto;
}

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

.lab-photo-item {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.lab-photo-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.lab-photo-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
}

.photo-caption {
    background-color: white;
    padding: 20px;
}

.photo-caption h4 {
    font-size: 1.2rem;
    color: #0056b3;
    margin-bottom: 8px;
}

.photo-caption p {
    font-size: 0.95rem;
    color: #666;
    margin: 0;
}

/* 团队概述样式 */
.team-overview {
    margin-bottom: 50px;
    padding: 30px;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    line-height: 1.7;
}

.team-overview p {
    margin-bottom: 15px;
    color: #555;
    font-size: 1rem;
}

.team-overview p:last-child {
    margin-bottom: 0;
}

/* 团队成员分类下拉列表样式 */
.team-filter {
    margin-bottom: 40px;
    padding: 25px;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.filter-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.filter-container label {
    font-weight: 600;
    color: #333;
    font-size: 1.1rem;
}

.team-dropdown {
    padding: 12px 18px;
    border: 1px solid #ddd;
    border-radius: 6px;
    background-color: #fff;
    font-size: 16px;
    min-width: 220px;
    cursor: pointer;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.team-dropdown:focus {
    outline: none;
    border-color: #0056b3;
    box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.2);
}

/* 页面横幅样式 */
.page-banner {
    position: relative;
    height: 300px;
    margin-top: 80px;
    background-image: url('https://picsum.photos/seed/contact-banner/1920/400.jpg');
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

.page-banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 86, 179, 0.8) 0%, rgba(0, 86, 179, 0.6) 100%);
}

.page-banner-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
    padding: 0 20px;
}

.page-banner-content h2 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 15px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.page-banner-content p {
    font-size: 1.5rem;
    max-width: 800px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* 联系页面样式 */
.contact-overview {
    margin-bottom: 60px;
    padding: 40px;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.contact-overview .section-header {
    text-align: center;
    border: none;
    padding-bottom: 0;
}

.contact-overview .section-header h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    color: #0056b3;
}

.contact-overview .section-header p {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto;
    color: #555;
}

.contact-info {
    margin-bottom: 60px;
}

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

.contact-card {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 30px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.contact-icon {
    width: 70px;
    height: 70px;
    background-color: #e6f0fd;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 20px;
}

.contact-icon i {
    font-size: 2rem;
    color: #0056b3;
}

.contact-card h3 {
    margin-bottom: 15px;
    color: #0056b3;
    font-size: 1.3rem;
}

.contact-card p {
    margin-bottom: 8px;
    color: #555;
}

.contact-card a {
    color: #0056b3;
    text-decoration: none;
    transition: color 0.3s;
}

.contact-card a:hover {
    color: #004494;
    text-decoration: underline;
}

/* 地图样式 */
.contact-map {
    margin-bottom: 60px;
}

.contact-map .section-title {
    color: #0056b3;
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.contact-map .section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: #0056b3;
}

.map-container {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.map-placeholder {
    position: relative;
}

.map-placeholder img {
    width: 100%;
    height: auto;
    display: block;
}

.map-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: white;
    padding: 30px 20px 20px;
}

.map-caption p {
    margin-bottom: 5px;
}

/* 交通指南样式 */
.transportation {
    margin-bottom: 60px;
}

.transportation .section-title {
    color: #0056b3;
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.transportation .section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: #0056b3;
}

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

.transport-card {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 30px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.transport-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.transport-icon {
    width: 60px;
    height: 60px;
    background-color: #e6f0fd;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
}

.transport-icon i {
    font-size: 1.8rem;
    color: #0056b3;
}

.transport-card h3 {
    margin-bottom: 15px;
    color: #0056b3;
    font-size: 1.3rem;
}

.transport-card p {
    margin-bottom: 10px;
    color: #555;
}

.transport-card ul {
    padding-left: 20px;
    margin-bottom: 0;
}

.transport-card li {
    margin-bottom: 8px;
    color: #555;
}

/* 常见问题样式 */
.faq {
    margin-bottom: 60px;
}

.faq .section-title {
    color: #0056b3;
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.faq .section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: #0056b3;
}

.faq-container {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.faq-item {
    border-bottom: 1px solid #eaeaea;
}

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

.faq-question {
    padding: 20px 30px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s;
}

.faq-question:hover {
    background-color: #f8f9fa;
}

.faq-question h3 {
    margin-bottom: 0;
    color: #333;
    font-size: 1.2rem;
    font-weight: 600;
}

.faq-question i {
    color: #0056b3;
    transition: transform 0.3s;
}

.faq-item.active .faq-question i {
    transform: rotate(45deg);
}

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

.faq-item.active .faq-answer {
    max-height: 500px;
    transition: max-height 0.5s ease-in;
}

.faq-answer p {
    padding: 0 30px 20px;
    color: #555;
    line-height: 1.6;
}

/* 页脚样式 */
.footer {
    background-color: #0056b3;
    color: white;
    padding: 60px 0 20px;
}

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

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

.footer-logo img {
    width: 50px;
    height: 50px;
    margin-right: 15px;
    border-radius: 50%;
}

.footer-logo h3 {
    font-size: 1.2rem;
}

.footer-links h4,
.footer-contact h4 {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

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

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

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-contact p {
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.8);
}

.footer-contact i {
    margin-right: 8px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 20px;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .carousel-caption h2 {
        font-size: 2.5rem;
    }
    
    .carousel-caption p {
        font-size: 1.2rem;
    }
    
    .professor-info {
        flex-direction: column;
        text-align: center;
    }
    
    .professor-photo {
        margin-right: 0;
        margin-bottom: 20px;
    }
    
    /* 团队页面响应式设计 */
    .team-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 25px;
    }
    
    .team-section h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-item {
        margin: 0;
        width: 100%;
        text-align: center;
        padding: 15px 0;
        border-bottom: 1px solid #f1f5f9;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero {
        height: 400px;
    }
    
    .carousel-caption h2 {
        font-size: 2rem;
    }
    
    .carousel-caption p {
        font-size: 1rem;
    }
    
    .carousel-control {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .carousel-control.prev {
        left: 10px;
    }
    
    .carousel-control.next {
        right: 10px;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .section-header h2 {
        margin-bottom: 10px;
    }
    
    .tabs-nav {
        flex-direction: column;
    }
    
    .tabs-content {
        padding: 20px;
    }
    
    .news-list,
    .research-grid {
        grid-template-columns: 1fr;
    }
    
    .join-content {
        padding: 25px;
    }
    
    /* 代表性论文与专利响应式布局 */
    .publications-patents-container {
        flex-direction: column;
        gap: 30px;
    }
    
    /* 团队页面响应式设计 */
    .team-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .team-section {
        margin-bottom: 40px;
    }
    
    .team-section h2 {
        font-size: 1.8rem;
        margin-bottom: 30px;
    }
    
    .member-photo {
        height: 340px;
        width: 210px;
    }
    
    .member-info {
        padding: 20px;
    }
    
    .team-filter {
        margin-bottom: 30px;
        padding: 20px;
    }
    
    .filter-container {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .team-dropdown {
        width: 100%;
        min-width: auto;
    }
    
    .alumni-section {
        padding: 20px;
    }
    
    .team-overview {
        padding: 20px;
        margin-bottom: 30px;
    }
}

@media (max-width: 576px) {
    .logo-text h1 {
        font-size: 1.2rem;
    }
    
    .logo-text p {
        font-size: 0.8rem;
    }
    
    .hero {
        height: 300px;
    }
    
    .carousel-caption h2 {
        font-size: 1.5rem;
    }
    
    .carousel-caption p {
        font-size: 0.9rem;
    }
    
    .main-content {
        padding: 40px 0;
    }
    
    /* 团队页面响应式设计 */
    .team-section h2 {
        font-size: 1.6rem;
    }
    
    .member-info h3 {
        font-size: 1.3rem;
    }
    
    .member-photo {
        height: 300px;
        width: 180px;
    }
    
    .member-info {
        padding: 15px;
    }
    
    .alumni-section {
        padding: 15px;
    }
    
    .team-overview {
        padding: 15px;
    }
}