/* ================ 基础样式 ================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #ffffff;
    color: #333;
    line-height: 2.0;
    overflow-x: hidden;
}

/* ================ 导航栏 ================ */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    height: 70px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1a5f7a;
    display: flex;
    align-items: center;
}

.logo i {
    margin-right: 10px;
    color: #4a90e2;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 600;
    font-size: 1rem;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #4a90e2;
}

/* 下拉菜单样式 */
.nav-dropdown {
    position: relative;
    margin-left: 2rem;
}

.dropdown-toggle {
    text-decoration: none;
    color: #333;
    font-weight: 600;
    font-size: 1rem;
    transition: color 0.3s;
    display: flex;
    align-items: center;
    gap: 5px;
}

.dropdown-toggle:hover {
    color: #4a90e2;
}

.dropdown-toggle i {
    font-size: 0.8rem;
    transition: transform 0.3s;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background-color: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    list-style: none;
}

.dropdown-item {
    display: block;
    padding: 12px 20px;
    color: #333;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
    white-space: nowrap;
}

.dropdown-item:hover {
    background-color: rgba(0, 86, 166, 0.05);
    color: #0056a6;
    padding-left: 25px;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown:hover .dropdown-toggle i {
    transform: rotate(180deg);
}

.dropdown-menu li:not(:last-child) {
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 20px;
    width: 12px;
    height: 12px;
    background-color: white;
    transform: rotate(45deg);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    border-left: 1px solid rgba(0, 0, 0, 0.1);
}

/* ================ 移动端导航 ================ */
.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #0056a6;
    padding: 10px;
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: white;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    z-index: 999;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.mobile-nav.active {
    max-height: 500px;
    overflow-y: auto;
}

.mobile-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-nav li {
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid #f0f0f0;
}

.mobile-nav li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.mobile-nav a {
    text-decoration: none;
    color: #333;
    font-weight: 600;
    font-size: 1.1rem;
    display: block;
    padding: 8px 0;
    transition: color 0.3s;
}

.mobile-nav a:hover {
    color: #4a90e2;
}

/* 移动端下拉菜单 */
.mobile-dropdown {
    position: relative;
}

.mobile-dropdown-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    padding: 12px 15px;
    color: #333;
    text-decoration: none;
    font-weight: 600;
    background-color: rgba(0, 86, 166, 0.05);
    border-radius: 5px;
    margin: 5px 0;
}

.mobile-dropdown-toggle i {
    transition: transform 0.3s;
    margin-left: 5px;
}

.mobile-dropdown-toggle.active i {
    transform: rotate(180deg);
}

.mobile-dropdown-menu {
    max-height: 0;
    overflow: hidden;
    background-color: rgba(0, 86, 166, 0.03);
    border-radius: 5px;
    margin: 0;
    padding-left: 20px;
    transition: max-height 0.3s ease;
    list-style: none;
}

.mobile-dropdown-menu.active {
    max-height: 200px;
}

.mobile-dropdown-menu li a {
    display: block;
    padding: 10px 15px;
    color: #555;
    text-decoration: none;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: all 0.2s;
}

.mobile-dropdown-menu li a:hover {
    color: #0056a6;
    border-left-color: #0056a6;
    background-color: rgba(0, 86, 166, 0.05);
}

/* ================ 横幅区域 ================ */
.banner {
    min-height: 100vh;
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), 
                url('../images/banners/background.jpg');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
    padding: 150px 20px 80px;
    margin-top: 70px;
}

.banner h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5);
}

.banner p {
    font-size: 1.3rem;
    max-width: 800px;
    margin-bottom: 2rem;
}

.cta-button {
    background-color: #0056a6;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
}

.cta-button:hover {
    background-color: #0056a6;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* ================ 主要内容区域 ================ */
.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 100px 20px;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    color: #000000;
    font-size: 2.0rem;
    position: relative;
}

.section-title:after {
    content: '';
    position: absolute;
    width: 100px;
    height: 4px;
    background-color: #0056a6;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
}

/* ================ 研究部分优化样式 ================ */

/* 研究简介样式 */
.research-intro {
    max-width: 1000px;
    margin: 0 auto 60px;
    text-align: center;
    font-size: 1.2rem;
    line-height: 1.8;
    color: #000000;
    padding: 0 20px;
}

.research-intro p {
    margin-bottom: 20px;
}

.research-intro p:last-child {
    margin-bottom: 0;
}

/* 修改研究网格布局 - 让图片更突出 */
.research-grid-layout {
    display: flex;
    justify-content: space-between;
    align-items: stretch; /* 改为stretch使两侧高度与图片一致 */
    gap: 30px; /* 增加间隙 */
    flex: 1;
    min-height: 0;
    padding: 10px 0;
    align-items: center;
}

/* 田字格布局 - 变窄 */
.research-grid {
    flex: 0 0 22%; /* 从38%减少到22% */
    height: 100%;
    display: grid;
    grid-template-columns: 1fr; /* 改为单列，上下排列 */
    grid-template-rows: repeat(4, 1fr);
    gap: 20px;
    max-height: 100%;
}

.research-grid-left {
    order: 1;
}

.research-grid-right {
    order: 3;
}

/* 网格项样式调整 - 更窄更紧凑 */
.grid-item {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 0;
    height: 100%; /* 使所有网格项高度一致 */
}

.grid-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
    z-index: 10;
}

/* 网格项悬停颜色效果 */
.grid-item[data-order="1"]:hover { border-top: 4px solid #4a90e2; }
.grid-item[data-order="2"]:hover { border-top: 4px solid #5cb85c; }
.grid-item[data-order="3"]:hover { border-top: 4px solid #f0ad4e; }
.grid-item[data-order="4"]:hover { border-top: 4px solid #d9534f; }
.grid-item[data-order="5"]:hover { border-top: 4px solid #5bc0de; }
.grid-item[data-order="6"]:hover { border-top: 4px solid #337ab7; }
.grid-item[data-order="7"]:hover { border-top: 4px solid #8e44ad; }
.grid-item[data-order="8"]:hover { border-top: 4px solid #2c3e50; }

.grid-content {
    padding: 18px;
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.grid-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, #f0f7ff, #e3f2fd);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    font-size: 1.3rem;
    color: #0056a6;
    transition: all 0.3s;
}

.grid-item:hover .grid-icon {
    background: linear-gradient(135deg, #0056a6, #4a90e2);
    color: white;
    transform: scale(1.1) rotate(5deg);
}

.grid-content h3 {
    color: #0056a6;
    font-size: 1.05rem;
    margin-bottom: 8px;
    line-height: 1.3;
    font-weight: 700;
}

.grid-content p {
    color: #666;
    font-size: 0.8rem;
    line-height: 1.4;
    margin-bottom: 12px;
    flex: 1;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.grid-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #4a90e2;
    font-weight: 600;
    text-decoration: none;
    font-size: 0.8rem;
    transition: all 0.3s;
    margin-top: auto;
}

.grid-link i {
    transition: transform 0.3s;
    font-size: 0.8rem;
}

.grid-item:hover .grid-link {
    color: #0056a6;
}

.grid-item:hover .grid-link i {
    transform: translateX(4px);
}

/* 中心图片区域 - 更加突出 */
.research-center-image {
    flex: 0 0 52%; /* 从24%增加到52%，占据一半以上空间 */
    order: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 25px;
    height: 100%;
    padding: 0 10px;
}

.center-image-container {
    width: 100%;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    position: relative;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 3px solid white;
}

.center-image-container:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3);
    border-color: #4a90e2;
}

.center-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.8s ease-out;
}

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

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 86, 166, 0.95) 0%, rgba(0, 86, 166, 0.7) 50%, transparent 100%);
    color: white;
    padding: 25px 30px;
    text-align: center;
}

.image-overlay h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
    font-weight: 700;
}

.image-description {
    font-size: 0.95rem;
    opacity: 0.9;
    line-height: 1.5;
    max-width: 500px;
    margin: 0 auto;
}

.btn-view-full {
    padding: 12px 25px;
    background: #0056a6;
    color: white;
    border: none;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(0, 86, 166, 0.3);
}

.btn-view-full:hover {
    background: #003d7a;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 86, 166, 0.4);
}

/* ================ 响应式设计调整 ================ */

/* 大桌面端 (1400px以下) */
@media (max-width: 1400px) {
    .research-grid {
        flex: 0 0 24%; /* 稍微增加一点宽度 */
    }
    
    .research-center-image {
        flex: 0 0 48%; /* 稍微减少一点宽度 */
    }
}

/* 中等桌面端 (1200px以下) */
@media (max-width: 1200px) {
    .research-grid-layout {
        gap: 25px;
    }
    
    .research-grid {
        flex: 0 0 25%;
    }
    
    .research-center-image {
        flex: 0 0 46%;
    }
    
    .grid-content h3 {
        font-size: 1rem;
    }
    
    .grid-content p {
        font-size: 0.75rem;
        -webkit-line-clamp: 2;
    }
}

/* 平板端 (992px以下) */
@media (max-width: 992px) {
    .research-intro {
        font-size: 1.1rem;
        margin-bottom: 40px;
        padding: 0 15px;
    }
    
    .research-grid-layout {
        flex-direction: column;
        gap: 40px;
        max-height: none;
        overflow-y: auto;
        padding: 20px 10px;
    }
    
    .research-grid {
        width: 100%;
        flex: 0 0 auto;
        grid-template-columns: repeat(2, 1fr); /* 改为两列 */
        grid-template-rows: repeat(2, 1fr);
        gap: 20px;
    }
    
    .research-center-image {
        width: 100%;
        flex: 0 0 auto;
        order: 1;
        margin-bottom: 30px;
    }
    
    .research-grid-left,
    .research-grid-right {
        order: 2;
    }
    
    .center-image-container {
        max-width: 700px;
        margin: 0 auto;
    }
    
    .grid-item {
        min-height: 180px;
    }
    
    .grid-content p {
        -webkit-line-clamp: 2;
    }
}

/* 平板小尺寸 (768px以下) */
@media (max-width: 768px) {
    .research-intro {
        font-size: 1rem;
        margin-bottom: 30px;
        line-height: 1.6;
    }
    
    .research-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(2, 1fr);
        gap: 15px;
    }
    
    .grid-item {
        min-height: 160px;
    }
    
    .grid-content {
        padding: 15px;
    }
    
    .grid-icon {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
        margin-bottom: 10px;
    }
    
    .grid-content h3 {
        font-size: 0.95rem;
    }
    
    .grid-content p {
        font-size: 0.75rem;
        -webkit-line-clamp: 2;
    }
    
    .grid-link {
        font-size: 0.8rem;
    }
    
    .center-image-container {
        max-width: 500px;
        aspect-ratio: 3/2;
    }
    
    .image-overlay {
        padding: 20px;
    }
    
    .image-overlay h3 {
        font-size: 1.2rem;
    }
    
    .image-description {
        font-size: 0.85rem;
    }
    
    .btn-view-full {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}

/* 手机端 (576px以下) */
@media (max-width: 576px) {
    .research-intro {
        font-size: 0.95rem;
        padding: 0 10px;
    }
    
    .research-grid {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(4, auto);
        gap: 15px;
    }
    
    .grid-item {
        min-height: auto;
    }
    
    .grid-content p {
        -webkit-line-clamp: 3;
    }
    
    .center-image-container {
        max-width: 350px;
        aspect-ratio: 1/1;
    }
    
    .image-overlay {
        padding: 15px;
    }
    
    .image-overlay h3 {
        font-size: 1.1rem;
    }
    
    .image-description {
        font-size: 0.8rem;
    }
}

/* 小手机端 (480px以下) */
@media (max-width: 480px) {
    .research-grid {
        gap: 12px;
    }
    
    .grid-content {
        padding: 12px;
    }
    
    .center-image-container {
        max-width: 300px;
    }
    
    .btn-view-full {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
}

/* 网格项动画调整 */
@keyframes gridItemAppear {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.grid-item {
    animation: gridItemAppear 0.5s ease-out forwards;
    opacity: 0;
}

/* 为每个网格项设置延迟动画 */
.grid-item[data-order="1"] { animation-delay: 0.1s; }
.grid-item[data-order="2"] { animation-delay: 0.2s; }
.grid-item[data-order="3"] { animation-delay: 0.3s; }
.grid-item[data-order="4"] { animation-delay: 0.4s; }
.grid-item[data-order="5"] { animation-delay: 0.5s; }
.grid-item[data-order="6"] { animation-delay: 0.6s; }
.grid-item[data-order="7"] { animation-delay: 0.7s; }
.grid-item[data-order="8"] { animation-delay: 0.8s; }

/* ================ 全图查看模态框 ================ */
.full-image-modal .modal-content {
    max-width: 95%;
    max-height: 95vh;
    width: 1200px;
    overflow: hidden;
    background: #f8f9fa;
}

.full-image-modal .modal-image-container {
    max-height: 85vh;
    overflow: auto;
    padding: 20px;
    text-align: center;
}

#fullImageView {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

/* ================ 网格项动画 ================ */
@keyframes gridItemAppear {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.grid-item {
    animation: gridItemAppear 0.5s ease-out forwards;
    opacity: 0;
}

/* 为每个网格项设置延迟动画 */
.grid-item[data-order="1"] { animation-delay: 0.1s; }
.grid-item[data-order="2"] { animation-delay: 0.2s; }
.grid-item[data-order="3"] { animation-delay: 0.3s; }
.grid-item[data-order="4"] { animation-delay: 0.4s; }
.grid-item[data-order="5"] { animation-delay: 0.5s; }
.grid-item[data-order="6"] { animation-delay: 0.6s; }
.grid-item[data-order="7"] { animation-delay: 0.7s; }
.grid-item[data-order="8"] { animation-delay: 0.8s; }

/* ================ Team部分 ================ */
.team-slider {
    display: flex;
    justify-content: center;
    overflow-x: auto;
    padding: 20px 10px;
    gap: 25px;
    scrollbar-width: thin;
    scrollbar-color: #0056a6 #f1f1f1;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
}

.team-slider::-webkit-scrollbar {
    height: 8px;
}

.team-slider::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.team-slider::-webkit-scrollbar-thumb {
    background: #0056a6;
    border-radius: 10px;
}

.team-member {
    flex: 0 0 auto;
    width: 220px;
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s;
}

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

.member-img {
    height: 220px;
    background-size: cover;
    background-position: top;
}

.member-info {
    padding: 20px;
}

.member-name {
    font-weight: 700;
    color: #0056a6;
    margin-bottom: 5px;
}

.member-role {
    color: #4a90e2;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

/* 团队链接样式优化 */
.member-link {
    display: block;
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s;
}

.member-link:hover {
    transform: translateY(-5px);
}

/* ================ Publications部分 ================ */
.articles-container {
    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
    justify-content: space-between; 
    gap: 2.5rem;
}

.article-card {
    display: flex;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);  
    transition: transform 0.3s ease;
}

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

.article-image {
    height: 250px;
    width: 100%;
    flex: 0 0 250px;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
}

.article-content {
    flex: 1;
    padding: 25px;
}

.article-content h3 {
    margin-top: 0;
    color: #0056a6;
}

.article-content h3 a {
    color: inherit;
    text-decoration: none;
}

.article-content h3 a:hover {
    color: #4a90e2;
}

.article-meta {
    color: #666;
    font-size: 0.9rem;
    margin: 10px 0;
}

.read-more {
    display: inline-block;
    margin-top: 15px;
    color: #000000;
    font-weight: bold;
    text-decoration: none;
}

.read-more:hover {
    text-decoration: underline;
}

/* Publications原文链接样式 */
.pub-links {
    margin-top: 1.2rem;
    padding-top: 1.2rem;
    border-top: 1px solid #eee;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.btn-pub-link {
    display: inline-flex;
    align-items: center;
    background-color: #f0f7ff;
    color: #0056a6;
    padding: 8px 18px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1.5px solid #cce0ff;
    transition: all 0.25s ease;
}

.btn-pub-link i {
    margin-right: 8px;
    font-size: 0.9em;
}

.btn-pub-link:hover {
    background-color: #0056a6;
    color: white;
    border-color: #0056a6;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 86, 166, 0.2);
}

/* ================ 页脚 ================ */
footer {
    background-color: #0056a6;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-column h3 {
    font-size: 1.5rem;
    margin-bottom: 25px;
    color: #ffffff;
    position: relative;
    padding-bottom: 10px;
}

.footer-column h3:after {
    content: '';
    position: absolute;
    width: 50px;
    height: 3px;
    background-color: #4a90e2;
    bottom: 0;
    left: 0;
}

.contact-list li {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
}

.contact-list i {
    margin-right: 10px;
    color: #4a90e2;
    margin-top: 5px;
}

.copyright {
    text-align: center;
    padding-top: 30px;
    margin-top: 50px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #4a90e2;
    font-size: 0.9rem;
}

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

/* 大桌面端 (1200px以下) */
@media (max-width: 1200px) {
    .research-grid {
        flex: 0 0 36%;
    }
    
    .research-center-image {
        flex: 0 0 28%;
    }
    
    .grid-content {
        padding: 15px;
    }
    
    .grid-content h3 {
        font-size: 1rem;
    }
    
    .grid-content p {
        font-size: 0.8rem;
        -webkit-line-clamp: 2;
    }
}

/* 平板端 (992px以下) */
@media (max-width: 992px) {
    .banner h1 {
        font-size: 2.8rem;
    }
    
    /* 导航栏切换 */
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .mobile-nav {
        display: block;
    }
    
    /* 桌面端下拉菜单隐藏 */
    .dropdown-menu {
        display: none;
    }
    
    /* 研究网格布局调整 */
    .research-grid-layout {
        flex-direction: column;
        gap: 30px;
        max-height: none;
        overflow-y: auto;
        padding: 20px 10px;
    }
    
    .research-grid {
        width: 100%;
        flex: 0 0 auto;
        grid-template-columns: repeat(4, 1fr);
        grid-template-rows: 1fr;
        gap: 15px;
    }
    
    .research-center-image {
        width: 100%;
        flex: 0 0 auto;
        order: 1;
    }
    
    .research-grid-left,
    .research-grid-right {
        order: 2;
    }
    
    .center-image-container {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .grid-item {
        min-height: 200px;
    }
    
    .grid-content p {
        -webkit-line-clamp: 2;
    }
}

/* 平板小尺寸 (768px以下) */
@media (max-width: 768px) {
    .banner {
        padding: 120px 15px 60px;
        min-height: auto;
    }
    
    .banner h1 {
        font-size: 2.2rem;
    }
    
    .banner p {
        font-size: 1.1rem;
    }
    
    .banner-news {
        width: 95%;
        padding: 20px 15px;
        margin: -30px auto 0;
    }
    
    .news-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .news-list {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .news-item {
        padding: 12px;
    }
    
    .container {
        padding: 80px 15px 40px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    /* 研究区域调整 */
    .research-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(2, 1fr);
        gap: 15px;
    }
    
    .grid-item {
        min-height: 180px;
    }
    
    .grid-content {
        padding: 12px;
    }
    
    .grid-icon {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
        margin-bottom: 10px;
    }
    
    .grid-content h3 {
        font-size: 0.95rem;
    }
    
    .grid-content p {
        font-size: 0.75rem;
        -webkit-line-clamp: 2;
    }
    
    .grid-link {
        font-size: 0.8rem;
    }
    
    .center-image-container {
        max-width: 300px;
    }
    
    .image-overlay {
        padding: 15px;
    }
    
    .image-overlay h3 {
        font-size: 1rem;
    }
    
    .btn-view-full {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
    
    /* 团队展示调整 */
    .team-slider {
        justify-content: flex-start;
        padding: 15px 5px;
        gap: 20px;
    }
    
    .team-member {
        width: 280px;
        margin: 0 10px;
    }
    
    .member-img {
        height: 250px;
    }
    
    .member-info {
        padding: 20px 15px;
    }
    
    .member-name {
        font-size: 1.3rem;
        margin-bottom: 8px;
    }
    
    .member-role {
        font-size: 1rem;
        margin-bottom: 15px;
    }
    
    /* 文章卡片调整 */
    .article-card {
        flex-direction: column;
    }
    
    .article-image {
        flex: 0 0 200px;
    }
}

/* 手机端 (576px以下) */
@media (max-width: 576px) {
    .banner h1 {
        font-size: 1.8rem;
    }
    
    .banner-news {
        position: relative;
        margin-top: 20px;
    }
    
    .research-grid {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(4, auto);
        gap: 12px;
    }
    
    .grid-item {
        min-height: auto;
    }
    
    .grid-content p {
        -webkit-line-clamp: 3;
    }
    
    .center-image-container {
        max-width: 250px;
    }
    
    .team-member {
        width: 260px;
        min-width: 260px;
    }
    
    .member-img {
        height: 220px;
    }
}

/* 小手机端 (480px以下) */
@media (max-width: 480px) {
    .team-slider {
        gap: 15px;
        padding: 10px 5px;
    }
    
    .team-member {
        width: 240px;
        min-width: 240px;
    }
    
    .member-img {
        height: 200px;
    }
}
/* ================ 轮播横幅样式 ================ */
.carousel-banner {
    position: relative;
    width: 100%;
    height: 80vh;
    min-height: 600px;
    max-height: 800px;
    overflow: hidden;
    margin-top: 70px;
    background: #000;
}

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

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease-in-out, visibility 1s ease-in-out;
    cursor: pointer;
}

.carousel-slide.active {
    opacity: 1;
    visibility: visible;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 8s ease-out;
}

.carousel-slide.active img {
    transform: scale(1.05);
}

.slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right,100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide-content {
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 0 20px;
    transform: translateY(30px);
    opacity: 0;
    transition: transform 1s ease-out 0.3s, opacity 1s ease-out 0.3s;
}

.carousel-slide.active .slide-content {
    transform: translateY(0);
    opacity: 1;
}

.slide-title {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 0px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.5px;
}

.slide-description {
    font-size: 1.5rem;
    margin-bottom: 30px;
    line-height: 1.6;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.slide-cta {
    background: #0056a6;
    color: #ffffff;
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.slide-cta:hover {
    background: #0056a6;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* 轮播导航按钮 */
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-50%) scale(1.1);
}

.prev-btn {
    left: 30px;
}

.next-btn {
    right: 30px;
}

/* 轮播指示器 */
.carousel-indicators {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.indicator {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.indicator.active {
    background: #0056a6;
    transform: scale(1.2);
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.7);
    transform: scale(1.1);
}

/* 轮播进度条 */
.carousel-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    z-index: 10;
}

.progress-bar {
    width: 25%; /* 对应每张图片的宽度 */
    height: 100%;
    background: #0056a6;
    transition: transform 8s linear; /* 与自动轮播时间同步 */
}

/* 调整横幅新闻区域位置 */
#home .banner-news {
    position: relative;
    width: 90%;
    max-width: 1200px;
    margin: -80px auto 0;
    z-index: 5;
}

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

/* 平板设备 */
@media (max-width: 992px) {
    .carousel-banner {
        height: 70vh;
        min-height: 500px;
    }
    
    .slide-title {
        font-size: 2.8rem;
    }
    
    .slide-description {
        font-size: 1.3rem;
    }
    
    .carousel-btn {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .prev-btn {
        left: 20px;
    }
    
    .next-btn {
        right: 20px;
    }
}

/* 平板小尺寸 */
@media (max-width: 768px) {
    .carousel-banner {
        height: 60vh;
        min-height: 400px;
    }
    
    .slide-title {
        font-size: 2.2rem;
    }
    
    .slide-description {
        font-size: 1.1rem;
        max-width: 90%;
    }
    
    .slide-cta {
        padding: 12px 30px;
        font-size: 1rem;
    }
    
    .carousel-btn {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
    
    .carousel-indicators {
        bottom: 30px;
    }
    
    .indicator {
        width: 12px;
        height: 12px;
    }
    
    #home .banner-news {
        margin: -60px auto 0;
    }
}

/* 手机端 */
@media (max-width: 576px) {
    .carousel-banner {
        height: 50vh;
        min-height: 350px;
    }
    
    .slide-title {
        font-size: 1.8rem;
    }
    
    .slide-description {
        font-size: 1rem;
    }
    
    .slide-cta {
        padding: 10px 25px;
        font-size: 0.9rem;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .prev-btn {
        left: 10px;
    }
    
    .next-btn {
        right: 10px;
    }
    
    .carousel-indicators {
        bottom: 20px;
    }
    
    .indicator {
        width: 10px;
        height: 10px;
    }
    
    #home .banner-news {
        margin: -40px auto 0;
    }
}

/* 小手机端 */
@media (max-width: 480px) {
    .carousel-banner {
        height: 45vh;
        min-height: 300px;
    }
    
    .slide-title {
        font-size: 1.6rem;
    }
    
    .slide-description {
        font-size: 0.9rem;
    }
    
    .slide-content {
        padding: 0 15px;
    }
}
/* ====== 新闻页面通用样式 ====== */
.news-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 20px 60px;
}

.news-page-title {
    text-align: center;
    color: #000000;
    font-size: 2.5rem;
    margin-bottom: 50px;
    position: relative;
}

.news-page-title:after {
    content: '';
    position: absolute;
    width: 100px;
    height: 4px;
    background-color: #0056a6;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.news-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.news-image {
    height: 200px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.news-category {
    position: absolute;
    top: 15px;
    left: 15px;
    background: rgba(0, 86, 166, 0.9);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.news-content {
    padding: 25px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    color: #666;
    font-size: 0.9rem;
}

.news-card-title {
    color: #0056a6;
    font-size: 1.3rem;
    margin-bottom: 15px;
    line-height: 1.4;
    text-decoration: none;
    transition: color 0.3s;
}

.news-card-title:hover {
    color: #4a90e2;
}

.news-card-excerpt {
    color: #555;
    line-height: 1.6;
    margin-bottom: 20px;
    flex: 1;
}

.news-read-more {
    color: #4a90e2;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s;
}

.news-read-more:hover {
    color: #0056a6;
    transform: translateX(5px);
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 50px;
}

.page-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: #f0f7ff;
    color: #0056a6;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.page-link:hover {
    background: #0056a6;
    color: white;
}

.page-link.active {
    background: #0056a6;
    color: white;
}

/* 新闻详情页样式 */
.news-detail-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid #eee;
}

.news-detail-title {
    color: #0056a6;
    font-size: 2rem;
    margin-bottom: 20px;
    line-height: 1.3;
}

.news-detail-meta {
    display: flex;
    justify-content: center;
    gap: 30px;
    color: #666;
    font-size: 0.95rem;
}

.news-detail-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #333;
    margin-bottom: 50px;
}

.news-detail-content img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 30px 0;
}

.news-detail-content h2, 
.news-detail-content h3 {
    color: #0056a6;
    margin: 30px 0 15px;
}

.news-detail-content p {
    margin-bottom: 20px;
}

.news-navigation {
    display: flex;
    justify-content: space-between;
    padding-top: 30px;
    border-top: 1px solid #eee;
}

.nav-prev, .nav-next {
    color: #0056a6;
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s;
}

.nav-prev:hover, .nav-next:hover {
    color: #4a90e2;
    transform: translateX(5px);
}
/* 新闻分类筛选 */
.news-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 40px;
    justify-content: center;
}

.category-btn {
    padding: 10px 20px;
    background: #f0f7ff;
    color: #0056a6;
    border: 2px solid #cce0ff;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.95rem;
}

.category-btn:hover {
    background: #e0eeff;
    transform: translateY(-2px);
}

.category-btn.active {
    background: #0056a6;
    color: white;
    border-color: #0056a6;
}
/* 添加全屏图片容器样式 */
.fullscreen-image-container {
    width: 100%;
    height: 80vh; /* 占据视口高度的80% */
    min-height: 600px;
    max-height: 900px;
    position: relative;
    overflow: hidden;
    border-radius: 20px;
    box-shadow: 0 25px 60px rgba(0, 86, 166, 0.25);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000; /* 黑色背景确保图片边缘不明显时好看 */
}

.fullscreen-image {
    width: 100%;
    height: 100%;
    object-fit: contain; /* 完整显示图片，不裁剪 */
    object-position: center;
    display: block;
    transition: transform 0.8s ease-out;
}

.fullscreen-image-container:hover .fullscreen-image {
    transform: scale(1.02);
}

.image-title-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 86, 166, 0.95) 0%, rgba(0, 86, 166, 0.7) 50%, transparent 100%);
    color: white;
    padding: 30px 40px;
    text-align: center;
    z-index: 2;
}

.image-title-overlay h3 {
    font-size: 2rem;
    margin-bottom: 10px;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.image-description {
    font-size: 1.2rem;
    opacity: 0.95;
    line-height: 1.5;
    max-width: 800px;
    margin: 0 auto;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* 调整主布局以容纳更大的图片 */
.research-main-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    padding: 40px 20px 60px; /* 增加底部内边距 */
    background: #ffffff;
    gap: 60px;
}

.research-center-visual {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* 删除之前的大图容器样式（如果存在） */
.full-height-image {
    /* 删除这个类的所有样式 */
}

/* 删除查看全图按钮样式 */
.btn-view-full {
    display: none; /* 不再需要这个按钮 */
}
/* ================ 研究简介背景框 ================ */
.research-intro {
    max-width: 1000px;
    margin: 0 auto 60px;
    text-align: center;
    font-size: 1.2rem;
    line-height: 1.8;
    color: #333;
    padding: 40px 50px;
    background: linear-gradient(145deg, #ffffff, #f8fafc);
    border-radius: 16px;
    box-shadow: 
        0 10px 30px rgba(0, 86, 166, 0.12),
        0 4px 12px rgba(0, 86, 166, 0.06),
        0 0 0 1px rgba(0, 86, 166, 0.05);
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid rgba(0, 86, 166, 0.1);
}

.research-intro::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #0056a6, #4a90e2, #0056a6);
    border-radius: 16px 16px 0 0;
}

.research-intro:hover {
    transform: translateY(-5px);
    box-shadow: 
        0 20px 40px rgba(0, 86, 166, 0.18),
        0 8px 20px rgba(0, 86, 166, 0.1),
        0 0 0 1px rgba(0, 86, 166, 0.1);
}

.research-intro p {
    position: relative;
    z-index: 1;
    margin-bottom: 20px;
}

.research-intro p:last-child {
    margin-bottom: 0;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .research-intro {
        padding: 35px 40px;
        margin: 0 auto 50px;
    }
}

@media (max-width: 768px) {
    .research-intro {
        padding: 30px 25px;
        margin: 0 auto 40px;
        font-size: 1.1rem;
        border-radius: 12px;
    }
}

@media (max-width: 576px) {
    .research-intro {
        padding: 25px 20px;
        margin: 0 auto 30px;
        font-size: 1rem;
        line-height: 1.7;
    }
}