@media (max-width: 700px) {
  #list {
    display: none;
  }
  .site-body {
    margin-left: 5%;
    margin-right: 5%;
  }
  .site-footer {
    padding-left: 5%;
    padding-right: 5%;
  }
  .header_logo img {
    height: 70px;
  }
  #menuButton img {
    height: 25px;
    width: 28px;
  }
  .header_menu {
    display: flex;
  }
  #menuButton {
    background-color: transparent;
    border-color: transparent;
    margin-right: 5%;
    align-items: center;
  }
  .header_ {
    display: flex;
    margin-top: 15px;
    margin-left: 5%;
    margin-right: 5%;
    justify-content: space-between;
  }
  #menu_list {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-in-out;
    font-size: 20px;
    margin: 0 5%;
    border-radius: 4px;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  }
  #menu_list a {
    color: #333;
    text-decoration: none;
    transition: color 0.3s ease;
  }
  #menu_list a:hover {
    color: #2196F3;
  }
  #menu_list p {
    margin-left: 5%;
    margin-top: 10px;
  }
}

/* 431!!!! */
@media (min-width: 700px) and (max-width: 1110px) {
  #menu_list {
    display: none;
  }
  #menuButton {
    display: none;
  }
  .site-body {
    padding-left: 5%;
    padding-right: 5%;
  }
  .site-footer {
    padding-left: 5%;
    padding-right: 5%;
  }
  .header_logo img {
    height: 120px;
    margin-left: 5%;
  }
  .header_list {
    margin-right: 10%;
    text-align: right;
  }
  .header_list li {
    display: inline-block;
    font-size: 24px;
    padding: 0 20px;
    transition: color 0.3s ease;
  }
  .header_list li a {
    color: #333;
    text-decoration: none;
  }
  .header_list li a:hover {
    color: #2196F3;
  }
  .header_list {
    position: relative;
    left: 5%;
    padding-right: 5%;
    margin-right: 5%;
  }
}

/* 当屏幕宽度大于1024像素时 */
@media (min-width: 1110px) {
  #menu_list {
    display: none;
  }
  #menuButton {
    display: none;
  }
  .wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

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

.header_logo img {
    height: 80px;
    width: auto;
}

.header_list {
    margin-left: auto;
}

.header_list ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 10px;  /* 减小间距 */
    justify-content: flex-end;  /* 右对齐 */
}

.header_list li a {
    color: #000000;
    text-decoration: none;
    font-size: 26px;  
    white-space: nowrap;
    font-weight: 500;
    padding: 10px 0;
    transition: color 0.3s ease;
}

.header_list li a:hover {
    color:#003366;
}

/* 移除之前的媒体查询中的冲突样式 */
@media (min-width: 1110px) {
    .header_logo img {
        height: auto;
        margin-left: 0;
    }
    .header_list {
        position: static;
        left: 0;
        margin-right: 0;
    }
    .header_list li {
        font-size: 18px;
        padding: 0;
    }
}
  .header_list li {
    font-size: 30px;
    padding-left: 20px;
    padding-right: 20px;
  }
  .header_list {
    position: relative;
    left: 10%;
    margin-right: 10%;
  }
}
body {
  background-color: #f5f5f5;
  margin: 0;
}

.site-footer {
    background-color: #f8f9fa;
    padding: 60px 0 40px;
    margin-top: 60px;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 40px;
}

.footer-map {
    width: 100%;
    height: 200px;
    margin-top: 15px;
    border-radius: 8px;
    object-fit: cover;
}

.footer-section {
    flex: 1;
    max-width: 500px;
}

.footer-info {
    margin-bottom: 20px;
}

.footer-section {
    flex: 1;
    min-width: 280px;
    transition: transform 0.3s ease;
}

.footer-section:hover {
    transform: translateY(-5px);
}

.footer-title {
    color: #003366;
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 12px;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: #003366;
    transition: width 0.3s ease;
}

.footer-section:hover .footer-title::after {
    width: 80px;
}

.footer-info p {
    color: #555;
    margin: 12px 0;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.footer-link {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #555;
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 5px 0;
}

.footer-link:hover {
    color: #003366;
    transform: translateX(5px);
}

.footer-link img {
    height: 22px;
    width: auto;
    transition: transform 0.3s ease;
}

.footer-link:hover img {
    transform: scale(1.1);
}

.footer-bottom {
    max-width: 1200px;
    margin: 40px auto 0;
    padding: 25px 30px;
    border-top: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.language-switch {
    margin: 0;
}

.language-switch img {
    height: 24px;
    width: auto;
    transition: all 0.3s ease;
    opacity: 0.8;
}

.language-switch img:hover {
    transform: scale(1.15) rotate(5deg);
    opacity: 1;
}

.copyright-text {
    color: #777;
    font-size: 14px;
    letter-spacing: 0.5px;
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        gap: 40px;
    }

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

    .footer-title::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .footer-info p {
        justify-content: center;
    }

    .footer-links {
        align-items: center;
    }
}
body {
    font-family: "SimSun", "Times New Roman", serif;
    margin: 0;
    padding: 0;
    background-color: #FDFDFD;
}

a {
    text-decoration: none;
    color: #333;
}

a:hover {
    color: #1565C0;
}
h2 {
  font-family: "Times New Roman", Times, serif;
  font-weight: 900;
}

.site-footer img {
  max-width: 100%;
  vertical-align: sub;
}

div[class*="_list"] li {
  display: inline;
}

button {
  cursor: pointer;
}

.pagetitle {
  color: #003366;
}
hr {
  color: #003366;
}

/* 添加新的变量定义 */
:root {
    --primary-color: #1a73e8;
    --secondary-color: #34a853;
    --gradient-start: #2b5876;
    --gradient-end: #4e4376;
}

/* 添加新的动画关键帧 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(45deg); }
    50% { transform: translateY(-20px) rotate(45deg); }
}

/* 更新welcome-section样式 */
.welcome-section {
    background-color: #003366;
    padding: 80px 20px;
    text-align: center;
    color: white;
}

.welcome-title {
    font-size: 36px;
    margin-bottom: 20px;
    font-weight: bold;
}

.welcome-subtitle {
    font-size: 24px;
    opacity: 0.9;
}

/* 删除 geometric-shapes 相关的所有样式 */
.geometric-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    opacity: 0.1;
}

.geometric-shapes::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    top: -150px;
    right: -150px;
    animation: rotate 20s linear infinite;
}

.geometric-shapes::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    bottom: -100px;
    left: -100px;
    transform: rotate(45deg);
    animation: float 6s ease-in-out infinite;
}

/* 更新响应式样式 */
@media (max-width: 768px) {
    .welcome-title {
        font-size: 2rem;
    }

    .welcome-subtitle {
        font-size: 1.2rem;
    }
}

.intro-section {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    padding: 60px 20px;
    background-color: #f5f5f5;
}

.intro-card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    width: 300px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.intro-icon {
    font-size: 2em;
    margin-bottom: 20px;
}

.intro-card h3 {
    color: #003366;
    margin-bottom: 15px;
}

.research-areas {
    padding: 60px 20px;
    background-color: white;
}

.research-areas h2 {
    text-align: center;
    color: #003366;
    margin-bottom: 40px;
}

.area-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.area-item {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 25px;
    text-align: center;
    transition: transform 0.3s ease;
}

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

.area-item h4 {
    color: #003366;
    margin-bottom: 15px;
}

/* 新闻动态板块样式 */
.news-section {
    padding: 60px 20px;
    background-color: #ffffff;
}

.news-section h2 {
    text-align: center;
    color: #003366;
    margin-bottom: 40px;
    font-size: 32px;
}

.news-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    padding: 0 20px;
}

.news-card {
    background: #fff;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.news-date {
    color: #666;
    font-size: 14px;
    margin-bottom: 10px;
}

.news-title {
    color: #003366;
    font-size: 20px;
    margin-bottom: 15px;
    line-height: 1.4;
}

.news-content {
    .institute-intro p {
        color: #555;
        font-size: 15px;
        line-height: 1.8;
        margin: 0;
        padding: 10px 0;
    }
    
    /* 移动端适配 */
    @media (max-width: 768px) {
        .institute-intro p {
            text-align: left;
            font-size: 14px;
            line-height: 1.6;
        }
    }
    line-height: 1.6;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.more-link {
    display: inline-block;
    padding: 12px 30px;
    background-color: #003366;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    font-size: 16px;
    transition: background-color 0.3s ease;
}

.more-link:hover {
    background-color: #003366;
}

.news-link {
    color: #003366;
    text-decoration: none;
    font-weight: 500;
    display: inline-block;
    transition: color 0.3s ease;
}

.news-link:hover {
    color: #1565C0;
}

/* 响应式布局调整 */
@media (max-width: 768px) {
    .news-container {
        grid-template-columns: 1fr;
    }
    
    .news-card {
        padding: 20px;
    }
}

/* 新闻页面样式 */
.news-page-container {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 20px;
}

.news-page-card {
    background: #fff;
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.news-page-date {
    color: #666;
    font-size: 16px;
    margin-bottom: 15px;
}

.news-page-title {
    color: #003366;
    font-size: 24px;
    margin-bottom: 20px;
    line-height: 1.4;
}

.news-page-content {
    color: #333;
    font-size: 16px;
    line-height: 1.8;
}

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

/* 对于大屏幕，保持一致的页面宽度 */
@media (min-width: 1110px) {
    .site-body {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }
}

/* 对于中等屏幕 */
@media (min-width: 700px) and (max-width: 1110px) {
    .site-body {
        padding: 0 5%;
    }
}

/* 对于小屏幕 */
@media (max-width: 700px) {
    .site-body {
        margin: 0 5%;
    }
}

.wechat-container {
    position: relative;
    cursor: pointer;
}

.qrcode {
    position: absolute;
    bottom: 100%;
    left: 50%;
    width: 150px;
    border-radius: 8px;
    box-shadow: 0 4px 25px rgba(0,0,0,0.2);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    padding: 4px;
    z-index: 1000;
}

.wechat-container:hover .qrcode {
    opacity: 1;
    visibility: visible;
    bottom: calc(100% + 20px);  /* 调整悬浮位置 */
}

/* 添加移动端适配 */
@media (max-width: 768px) {
    .qrcode {
        min-width: 300px;
        max-width: 90vw;
        padding: 15px;
    }


.wechat-container:hover .qrcode {
    opacity: 1;
    visibility: visible;
    bottom: calc(10px);
}
}

.footer-section {
    flex: 1;
    min-width: 250px;
}

.footer-content {
    gap: 40px;
}