* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    font-size: calc(16px + 0.25vw);
    color: #333;
}

/* 修改header为固定定位 */
header {
    /*background: linear-gradient(135deg, #0e2050 0%, #032b59 100%);*/
    background-color: #024369;
    padding: 1rem 1.5rem;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.2);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    position: relative; /* 为绝对定位的用户操作按钮提供参考 */
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center; /* 新增：使logo居中 */
    gap: 15px;
    width: 100%; /* 确保容器占据整个宽度 */
    position: absolute; /* 绝对定位，使其可以居中 */
    left: 50%;
    transform: translateX(-50%);
    pointer-events: none;
}

.logo {
    height: 82px;
    width: auto;
    display: block;
}

.site-title {
    color: white;
    font-size: 1.4rem;
    font-weight: 600;
    margin: 0;
}

/* 顶部用户操作栏 */
.user-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-left: auto; /* 确保用户操作按钮在右侧 */
}

/* 语言切换按钮样式 */
.lang-switch {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(149, 219, 222, 0.3);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.3s ease;
    white-space: nowrap;
    cursor: pointer;
    backdrop-filter: blur(10px);
}

.lang-switch:hover {
    background-color: #95dbde;
    color: #032b59;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(149, 219, 222, 0.3);
}

.user-btn {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(149, 219, 222, 0.3);
    padding: 8px 20px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.3s ease;
    white-space: nowrap;
    backdrop-filter: blur(10px);
}

.user-btn:hover {
    background-color: #95dbde;
    color: #032b59;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(149, 219, 222, 0.3);
}

.login-btn {
    background-color: transparent;
}

.register-btn {
    background-color: #95dbde;
    color: #032b59;
    border-color: #95dbde;
}

.register-btn:hover {
    background-color: #032b59;
    color: white;
    border-color: #032b59;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: #95dbde;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: #032b59;
}

.user-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: white;
}

.logout-btn {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 6px 15px;
    border-radius: 15px;
    text-decoration: none;
    font-size: 0.8rem;
    transition: all 0.3s ease;
}

.logout-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* 桌面导航菜单样式 */
.desktop-nav {
    /*background-color: rgba(3, 43, 89, 0.9);*/
    margin-top: 1rem;
    border-radius: 10px;
    backdrop-filter: blur(10px);
    padding: 0 15px;
    max-width: 1400px;
    margin: 1rem auto 0;
}

.nav-menu {
    display: flex;
    justify-content: center;
    list-style: none;
    padding: 0;
    margin: 0;
    flex-wrap: wrap;
}

.nav-item {
    position: relative;
    min-width: 140px;
    height: 40px;
    border: 1px solid rgba(149, 219, 222, 0.3);
    background-color: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 5px;
    padding: 0 25px;
    transition: all 0.3s ease;
    border-radius: 5px;
}

.nav-item > a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: calc(0.9rem + 0.1vw);
    text-align: center;
    letter-spacing: 0.5px;
}

.nav-item:hover {
    background-color: #95dbde;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(149, 219, 222, 0.3);
}

.nav-item:hover > a {
    color: #032b59;
}

.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #032b59;
    border: 1px solid #95dbde;
    border-radius: 8px;
    padding: 10px 0;
    min-width: 220px;
    z-index: 100;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    list-style: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.nav-item:hover .submenu {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.submenu li {
    padding: 0;
}

.submenu a {
    color: white;
    text-decoration: none;
    display: block;
    transition: all 0.2s ease;
    font-size: calc(0.85rem + 0.1vw);
    padding: 10px 20px;
}

.submenu li:hover {
    background-color: #95dbde;
}

.submenu li:hover a {
    color: #032b59;
    padding-left: 25px;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    background-color: rgba(3, 43, 89, 0.9);
    border: 1px solid rgba(149, 219, 222, 0.3);
    border-radius: 10px;
    z-index: 1100;
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.mobile-menu-btn:hover {
    background-color: #95dbde;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: white;
    margin: 4px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

/* 移动端抽屉菜单 */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -320px;
    width: 320px;
    height: 100%;
    background: linear-gradient(135deg, #0e2050 0%, #032b59 100%);
    z-index: 1050;
    transition: right 0.3s ease;
    overflow-y: auto;
    padding: 20px;
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.3);
}

.mobile-nav.open {
    right: 0;
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(149, 219, 222, 0.3);
}

.mobile-nav-title {
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
}

.mobile-close-btn {
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.mobile-close-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

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

.mobile-nav-item {
    margin-bottom: 8px;
}

.mobile-nav-item > a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    display: block;
    padding: 14px 16px;
    border: 1px solid rgba(149, 219, 222, 0.3);
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.mobile-nav-item > a:hover {
    background-color: #95dbde;
    color: #032b59;
    transform: translateX(5px);
}

.mobile-submenu-toggle {
    float: right;
    transition: transform 0.3s ease;
}

.mobile-submenu {
    display: none;
    list-style: none;
    padding-left: 15px;
    margin-top: 5px;
    padding-top: 10px;
    border-top: 1px solid rgba(149, 219, 222, 0.2);
}

.mobile-submenu li {
    margin-bottom: 5px;
}

.mobile-submenu a {
    color: white;
    text-decoration: none;
    display: block;
    padding: 10px 15px;
    background-color: rgba(3, 43, 89, 0.7);
    border-radius: 6px;
    transition: all 0.3s ease;
}

.mobile-submenu a:hover {
    background-color: #95dbde;
    color: #032b59;
    padding-left: 20px;
}

/* 移动端用户操作按钮 */
.mobile-user-actions {
    display: none;
    position: fixed;
    top: 20px;
    right: 80px;
    z-index: 1100;
    align-items: center;
    gap: 8px;
}

.mobile-lang-switch {
    background-color: rgba(3, 43, 89, 0.9);
    color: white;
    border: 1px solid rgba(149, 219, 222, 0.3);
    padding: 8px 14px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    cursor: pointer;
    backdrop-filter: blur(10px);
}

.mobile-lang-switch:hover {
    background-color: #95dbde;
    color: #032b59;
}

.mobile-user-btn {
    background-color: rgba(3, 43, 89, 0.9);
    color: white;
    border: 1px solid rgba(149, 219, 222, 0.3);
    padding: 8px 14px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.mobile-user-btn:hover {
    background-color: #95dbde;
    color: #032b59;
}

/* 登录/注册模态框样式 */
.auth-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.auth-modal.active {
    display: flex;
}

.auth-container {
    background-color: white;
    width: 90%;
    max-width: 450px;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(50px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-tabs {
    display: flex;
    background: linear-gradient(135deg, #0e2050 0%, #032b59 100%);
}

.auth-tab {
    flex: 1;
    padding: 18px;
    text-align: center;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    position: relative;
}

.auth-tab.active {
    background-color: #95dbde;
    color: #032b59;
}

.auth-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: #032b59;
    border-radius: 2px;
}

.auth-content {
    padding: 35px 40px;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
    animation: fadeInForm 0.5s ease;
}

@keyframes fadeInForm {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.auth-form h2 {
    color: #032b59;
    margin-bottom: 25px;
    text-align: center;
    font-size: 1.6rem;
    font-weight: 700;
}

.auth-form .form-group {
    margin-bottom: 22px;
    position: relative;
}

.auth-form .form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 600;
    font-size: 0.95rem;
}

.auth-form .form-group input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #f9f9f9;
}

.auth-form .form-group input:focus {
    outline: none;
    border-color: #95dbde;
    box-shadow: 0 0 0 3px rgba(149, 219, 222, 0.2);
    background-color: white;
}

.auth-form .form-group input.error {
    border-color: #ff6b6b;
}

.auth-form .form-group input.success {
    border-color: #51cf66;
}

.auth-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #032b59 0%, #0e2050 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.auth-btn:hover {
    background: linear-gradient(135deg, #0e2050 0%, #032b59 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(3, 43, 89, 0.3);
}

.auth-btn:active {
    transform: translateY(0);
}

.close-modal {
    position: absolute;
    top: 25px;
    right: 25px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    font-size: 28px;
    color: white;
    cursor: pointer;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.close-modal:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

/* 修改后的Banner区域样式 */
.banner-container {
    width: 100%;
    height: 500px;
    overflow: hidden;
    position: relative;
    margin-bottom: 30px;
    margin-top: 161px;
    /*border-radius: 0 0 20px 20px;*/
    border-radius: 0; /* 完全移除圆角 */
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.banner-media {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    position: relative;
    z-index: 1;
}

.banner-fallback {
    display: none;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    position: relative;
    z-index: 1;
}

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(14, 32, 80, 0.8) 0%, rgba(14, 32, 80, 0.4) 50%, transparent 100%);
    display: flex;
    align-items: center;
    padding-left: 10%;
    z-index: 100;
}

.banner-content {
    max-width: 600px;
    color: white;
    position: relative;
    z-index: 101;
}

.banner-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.1;
    position: relative;
    z-index: 102;
}

.banner-subtitle {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.9;
    position: relative;
    z-index: 102;
}

.banner-btn {
    display: inline-block;
    background-color: #95dbde;
    color: #032b59;
    padding: 15px 35px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    border: 2px solid #95dbde;
    position: relative;
    z-index: 102;
}

.banner-btn:hover {
    background-color: transparent;
    color: white;
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(149, 219, 222, 0.3);
}

/* 修改后的容器样式 */
.container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin: 0;
    padding: 0;
    width: 100%;
}

/* 主要内容区域样式 - 确保边距为0 */
.main {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
}

/* 交替布局的区块 */
.content-block {
    display: flex;
    width: 100%;
    gap: 0;
    margin: 0;
    padding: 0;
}

/* 文字部分 - 固定比例2 */
.text-section {
    flex: 2;
    background: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 40px;
    overflow: hidden;
}

/* 图片部分 - 固定比例3 */
.image-section {
    flex: 3;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    overflow: hidden;
    position: relative;
}

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

.text-section h2 {
    font-size: calc(2rem + 0.5vw);
    color: #032b59;
    margin-bottom: 20px;
}

.text-section p {
    margin-bottom: 15px;
    color: #555;
    line-height: 1.6;
    font-size: calc(1rem + 0.1vw);
}

.faculty-btn {
    display: inline-block;
    background-color: #032b59;
    color: white;
    padding: 12px 25px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;
    margin-top: 20px;
    transition: background-color 0.3s ease;
    font-size: calc(0.9rem + 0.1vw);
}

.faculty-btn:hover {
    background-color: #0e2050;
}

/* 侧边栏样式 */
.sidebar {
    background: #f0f4f9;
    padding: 40px;
    font-size: calc(1rem + 0.1vw);
    border-radius: 15px;
    margin-top: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

/* 邮件订阅表单样式 */
.mailing-list {
    margin-top: 20px;
}

.mailing-list h3 {
    margin-bottom: 25px;
    color: #032b59;
    font-size: 1.5rem;
    font-weight: 700;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.form-group input {
    width: 100%;
    padding: 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: white;
}

.form-group input:focus {
    outline: none;
    border-color: #95dbde;
    box-shadow: 0 0 0 3px rgba(149, 219, 222, 0.2);
}

.subscribe-btn {
    background: linear-gradient(135deg, #032b59 0%, #0e2050 100%);
    color: white;
    border: none;
    padding: 14px 30px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 1rem;
    width: 100%;
}

.subscribe-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(3, 43, 89, 0.2);
}

.contact-info {
    background-color: white;
    padding: 25px;
    border-radius: 10px;
    margin-top: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.contact-info h3 {
    color: #032b59;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.contact-info p {
    color: #666;
    margin-bottom: 10px;
    font-size: 0.95rem;
}

/* 底部导航样式 */
.footer-nav {
    background: linear-gradient(135deg, #022246 0%, #032b59 100%);
    color: white;
    padding: 60px 20px 30px;
    margin-top: 60px;
    border-radius: 20px 20px 0 0;
}

.footer-nav-container {
    display: flex;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.footer-nav-section {
    flex: 1;
    padding: 0 20px;
    min-width: 250px;
    margin-bottom: 30px;
}

.footer-nav-section h3 {
    margin-bottom: 25px;
    font-size: 1.3rem;
    font-weight: 700;
    color: #ffffff;
    position: relative;
    padding-bottom: 10px;
}

.footer-nav-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: #95dbde;
    border-radius: 2px;
}

.footer-nav-links {
    list-style: none;
    padding: 0;
}

.footer-nav-links li {
    margin-bottom: 12px;
}

.footer-nav-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-nav-links a:hover {
    color: #95dbde;
    transform: translateX(5px);
}

.footer-nav-links li:not(a) {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
    line-height: 1.6;
}

.copyright {
    text-align: center;
    margin-top: 50px;
    padding-top: 30px;
    border-top: 1px solid rgba(149, 219, 222, 0.2);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

/* 消息提示样式 */
.message {
    padding: 15px;
    margin: 15px 0;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    display: none;
    animation: fadeIn 0.3s ease;
}

.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.loading {
    text-align: center;
    padding: 20px;
    color: #032b59;
    font-weight: 600;
}

.loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    margin-left: 10px;
    border: 3px solid rgba(3, 43, 89, 0.2);
    border-top-color: #032b59;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    vertical-align: middle;
}

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

.form-error {
    color: #ff6b6b;
    font-size: 0.85rem;
    margin-top: 5px;
    display: block;
}

/* 媒体查询 - 平板设备 */
@media (max-width: 1024px) {
    .banner-container {
        margin-top: 137px;
        height: 450px;
    }
    .nav-item {
        margin: 0 4px;
        padding: 0 18px;
        min-width: 130px;
    }
    
    .nav-menu {
        justify-content: space-around;
    }
    
    
    
    .banner-title {
        font-size: 2.5rem;
    }
    
    .content-block {
        min-height: 450px;
    }
    
    .text-section {
        padding: 40px;
    }
    
    .text-section h2 {
        font-size: 2rem;
    }
}

/* 媒体查询 - 移动设备 */
@media (max-width: 768px) {
     .banner-container {
        height: 400px;
        margin-top: 117px;
    }
    .desktop-nav {
        display: none;
    }
    
    .header-content {
        flex-direction: column;
        gap: 15px;
        justify-content: center; /* 移动端居中 */
    }
    
    .logo-container {
        position: static; /* 移动端取消绝对定位 */
        transform: none;
        left: auto;
        justify-content: center;
    }
    
    .user-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-user-actions {
        display: flex;
    }
    
    .content-block {
        flex-direction: column;
        height: auto;
        min-height: auto;
    }
    
    .text-section, .image-section {
        flex: 1 0 100%;
        width: 100%;
    }
    
    .image-section {
        height: 300px;
        order: 1;
    }
    
    .text-section {
        order: 2;
    }
    
   
    
    .banner-overlay {
        padding-left: 5%;
    }
    
    .banner-title {
        font-size: 2.2rem;
    }
    
    .banner-subtitle {
        font-size: 1.1rem;
    }
    
    .footer-nav-container {
        flex-direction: column;
    }
    
    .footer-nav-section {
        text-align: center;
        margin-bottom: 30px;
    }
    
    .footer-nav-section h3::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .auth-content {
        padding: 30px 25px;
    }
    
    .text-section h2 {
        font-size: 1.8rem;
    }
    
    .text-section {
        padding: 35px 30px;
    }
}

/* 媒体查询 - 小屏手机 */
@media (max-width: 480px) {
    .banner-container {
        height: 350px;
        margin-top: 115px;
    }
    .mobile-user-actions {
        right: 70px;
    }
    
    .mobile-user-btn, .mobile-lang-switch {
        padding: 7px 12px;
        font-size: 0.75rem;
    }
    
    
    
    .banner-title {
        font-size: 1.8rem;
    }
    
    .banner-btn {
        padding: 12px 25px;
        font-size: 1rem;
    }
    
    .auth-container {
        width: 95%;
    }
    
    .auth-content {
        padding: 25px 20px;
    }
    
    .auth-form h2 {
        font-size: 1.4rem;
    }
    
    .text-section {
        padding: 30px 20px;
    }
    
    .text-section h2 {
        font-size: 1.6rem;
    }
    
    .faculty-btn {
        padding: 12px 25px;
        font-size: 0.95rem;
    }
    
    .sidebar {
        padding: 25px 20px;
    }
}

/* 媒体查询 - 大屏电脑 */
@media (min-width: 1200px) {
    .container {
        padding: 0 40px;
    }
    .banner-container {
        height: 550px;
        margin-top: 146px;
    }
    
    .user-actions {
        gap: 15px;
    }
    
    .user-btn, .lang-switch {
        padding: 10px 22px;
        font-size: 0.9rem;
    }
    
    .nav-item {
        min-width: 150px;
    }
    
    
    .banner-title {
        font-size: 3.5rem;
    }
    
    .banner-subtitle {
        font-size: 1.5rem;
    }
}
.banner-fallback-carousel {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
    z-index: 1;
}

.banner-slide.active {
    opacity: 1;
    z-index: 2;
}

/* 通过JavaScript动态设置背景图片 */
.banner-slide[data-src] {
    background-image: var(--slide-bg);
}

/* Banner控制按钮 */
.banner-controls {
    position: absolute;
    bottom: 30px;
    right: 30px;
    display: flex;
    align-items: center;
    gap: 15px;
    z-index: 5;
}

.banner-prev-btn, .banner-next-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    z-index: 6;
}

.banner-prev-btn:hover, .banner-next-btn:hover {
    background: rgba(149, 219, 222, 0.8);
    border-color: #95dbde;
    color: #032b59;
    transform: scale(1.1);
}

.banner-indicators {
    display: flex;
    gap: 8px;
    z-index: 6;
}

.banner-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
}

.banner-indicator.active {
    background: #95dbde;
    transform: scale(1.2);
    box-shadow: 0 0 10px rgba(149, 219, 222, 0.5);
}

.banner-indicator:hover {
    background: rgba(149, 219, 222, 0.7);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .banner-controls {
        bottom: 20px;
        right: 20px;
    }
    
    .banner-prev-btn, .banner-next-btn {
        width: 35px;
        height: 35px;
        font-size: 18px;
    }
    
    .banner-indicator {
        width: 10px;
        height: 10px;
    }
}
        }