/* 基础设置 */
:root {
    --primary-color: #003366;
    --secondary-color: #0056b3;
    --accent-color: #ffd700;
    --text-color: #333;
    --bg-light: #f8f9fa;
    --bg-color: #ffffff;
    --card-bg: #ffffff;
    --nav-bg: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --link-hover: var(--accent-color);
    --footer-bg: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --btn-bg: var(--primary-color);
    --btn-hover: var(--secondary-color);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --form-bg: #ffffff;
    --form-border: #ddd;
    --form-text: #333;
    --info-card-bg: #f5f5f5;
    --timeline-border: var(--primary-color);
    --meta-text: #666;
}

/* 深色模式变量 */
[data-theme="dark"] {
    --primary-color: #1a4b7c;
    --secondary-color: #2c5282;
    --accent-color: #b8860b;
    --text-color: #e0e0e0;
    --bg-light: #1a1a1a;
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --nav-bg: linear-gradient(135deg, #1a4b7c, #2c5282);
    --link-hover: #b8860b;
    --footer-bg: linear-gradient(135deg, #1a4b7c, #2c5282);
    --btn-bg: #1a4b7c;
    --btn-hover: #2c5282;
    --form-bg: #2a2a2a;
    --form-border: #404040;
    --form-text: #e0e0e0;
    --info-card-bg: #2a2a2a;
    --timeline-border: var(--accent-color);
    --meta-text: #a0a0a0;
    --card-glow: rgba(51, 153, 255, 0.15);
    --card-glow-hover: rgba(51, 153, 255, 0.3);
    --card-border-glow: rgba(51, 153, 255, 0.2);
    .form-control { background-color: var(--form-bg); border-color: var(--form-border); color: var(--form-text); }
    .info-card, .timeline-content, .affairs-card, .feature-card { background: var(--card-bg); border-color: var(--primary-color); }
    .news-meta, .form-group label, .timeline-date { color: var(--meta-text); }
    .academic-page, .admission-page, .campus-page, .news-page, .library-page { background: var(--bg-color); }
    .login-section { background: var(--card-bg); border-color: var(--form-border); }
    .map-container { filter: brightness(0.8); }
}

/* 特殊深色模式遮罩层 */
.spotlight-mask {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: black;
    pointer-events: none;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease;
    display: none;
    -webkit-mask-image: radial-gradient(circle at center, transparent 0, transparent var(--spotlight-size), black calc(var(--spotlight-size) + 50px));
    mask-image: radial-gradient(circle at center, transparent 0, transparent var(--spotlight-size), black calc(var(--spotlight-size) + 50px));
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.spotlight-mask.active { display: block; opacity: 1; }

.spotlight-center {
    position: fixed;
    width: 6px; height: 6px;
    background: #00ff00;
    border-radius: 50%;
    pointer-events: none;
    z-index: 10000;
    box-shadow: 0 0 10px #00ff00, 0 0 20px #00ff00;
    opacity: 0;
    transition: opacity 0.3s ease;
    transform: translate(-50%, -50%);
}

.spotlight-center.active { opacity: 0.8; }

/* 深色模式选择弹窗 */
.theme-modal {
    position: fixed;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: white;
    padding: 20px 30px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    z-index: 10001;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}
.theme-modal.show {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}
.theme-modal h3 { margin-bottom: 20px; color: var(--primary-color); font-size: 1.2em; }
.theme-modal .buttons { display: flex; gap: 10px; justify-content: flex-end; }
.theme-modal button { padding: 8px 20px; border: none; border-radius: 5px; cursor: pointer; transition: all 0.3s ease; }
.theme-modal .confirm-btn { background: var(--primary-color); color: white; }
.theme-modal .confirm-btn:hover { background: var(--secondary-color); }
.theme-modal .cancel-btn { background: #f0f0f0; color: #333; }
.theme-modal .cancel-btn:hover { background: #e0e0e0; }

/* 初始提示弹窗 */
.initial-notice {
    position: fixed;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    z-index: 10002;
    max-width: 90%; width: 400px;
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}
.initial-notice.show { opacity: 1; visibility: visible; transform: translate(-50%, -50%) scale(1); }
.initial-notice h3 { color: #ff4444; margin-bottom: 20px; font-size: 1.3em; }
.initial-notice p { margin-bottom: 20px; line-height: 1.6; color: #333; }
.notice-confirm { padding: 10px 30px; background: #ccc; color: #666; border: none; border-radius: 5px; cursor: not-allowed; transition: all 0.3s ease; font-size: 1em; }
.notice-confirm.active { background: var(--primary-color); color: white; cursor: pointer; }
.notice-confirm.active:hover { background: var(--secondary-color); transform: translateY(-2px); }
.countdown { display: inline-block; margin-left: 5px; font-weight: bold; }

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

body { font-family: "Microsoft YaHei", sans-serif; line-height: 1.6; color: var(--text-color); background-color: var(--bg-color); opacity: 1; transition: var(--transition-smooth); }

body:not(.homepage) { animation: fadeIn 0.5s ease-in-out; }

.page-transition { opacity: 0; transition: opacity 0.5s ease; }
.page-transition.fade-in { opacity: 1; }
.fade-transition { animation: fadeIn 0.5s ease-in-out; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* 固定顶部导航栏 */
.nav-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background: rgba(0, 51, 102, 015);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

/* 导航栏滚动效果 */
.nav-container.scrolled {
    background: rgba(0, 51, 102, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* 主容器调整 */
.main-content {
    margin-top: 70px;
    margin-left: 0;
    width: 100%;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.nav-menu > li {
    position: relative;
}

.nav-menu > li > a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    display: block;
    transition: var(--transition-smooth);
}

/* 下拉菜单 */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(0, 51, 102, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 0 0 8px 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    padding: 0.5rem 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    color: white;
    text-decoration: none;
    padding: 0.8rem 1.5rem;
    display: block;
    transition: var(--transition-smooth);
}

.dropdown-menu a:hover {
    background: rgba(255, 255, 255, 0.1);
    padding-left: 2rem;
}

/* 搜索框 */
.search-container {
    position: relative;
    margin-left: 20px;
    display: flex;
    align-items: center;
}

.search-wrapper {
    display: flex;
    align-items: center;
    position: relative;
}

.search-input {
    width: 0;
    padding: 8px 35px 8px 12px;
    border: none;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 15px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
}

.search-icon {
    background: transparent;
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 18px;
    padding: 0;
    position: absolute;
    right: 0;
}

/* 搜索框展开效果 */
.search-container:hover .search-input {
    width: 200px;
    opacity: 1;
    padding-right: 40px;
}

.search-input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
}

.search-icon i {
    transition: transform 0.3s ease;
}

.search-container:hover .search-icon i {
    transform: scale(0.9);
}

/* 扇形菜单 */
.radial-menu {
    position: fixed;
    right: 0;
    top: 50%;
    width: 50px;
    height: 50px;
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.radial-menu.active {
    opacity: 1;
    visibility: visible;
}

.radial-item {
    position: absolute;
    width: 160px;
    background: linear-gradient(135deg, rgba(0, 51, 102, 0.85), rgba(0, 86, 179, 0.85));
    backdrop-filter: blur(8px);
    color: white;
    text-decoration: none;
    padding: 15px 20px;
    border-radius: 15px;
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    transform-origin: right center;
    transform: translate(50px) scale(0.5);
    right: 0;
    z-index: 9998;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 菜单项位置调整和动画 */
.radial-menu.active .radial-item {
    opacity: 1;
}

.radial-menu.active .radial-item:nth-child(1) {
    transform: rotate(-65deg) translateX(-220px) rotate(65deg);
    transition-delay: 0.1s;
}

.radial-menu.active .radial-item:nth-child(2) {
    transform: rotate(-32.5deg) translateX(-220px) rotate(32.5deg);
    transition-delay: 0.2s;
}

.radial-menu.active .radial-item:nth-child(3) {
    transform: rotate(0deg) translateX(-220px) rotate(0deg);
    transition-delay: 0.3s;
}

.radial-menu.active .radial-item:nth-child(4) {
    transform: rotate(32.5deg) translateX(-220px) rotate(-32.5deg);
    transition-delay: 0.4s;
}

.radial-menu.active .radial-item:nth-child(5) {
    transform: rotate(65deg) translateX(-220px) rotate(-65deg);
    transition-delay: 0.5s;
}

/* 悬停效果 */
.radial-menu.active .radial-item:hover {
    background: linear-gradient(135deg, rgba(0, 86, 179, 0.95), rgba(0, 51, 102, 0.95));
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.2);
    transform-origin: right center;
}

.radial-menu.active .radial-item:nth-child(1):hover {
    transform: rotate(-65deg) translateX(-230px) rotate(65deg) scale(1.05);
}

.radial-menu.active .radial-item:nth-child(2):hover {
    transform: rotate(-32.5deg) translateX(-230px) rotate(32.5deg) scale(1.05);
}

.radial-menu.active .radial-item:nth-child(3):hover {
    transform: rotate(0deg) translateX(-230px) rotate(0deg) scale(1.05);
}

.radial-menu.active .radial-item:nth-child(4):hover {
    transform: rotate(32.5deg) translateX(-230px) rotate(-32.5deg) scale(1.05);
}

.radial-menu.active .radial-item:nth-child(5):hover {
    transform: rotate(65deg) translateX(-230px) rotate(-65deg) scale(1.05);
}

.radial-item i {
    font-size: 20px;
    width: 28px;
    text-align: center;
    transition: transform 0.3s ease;
}

.radial-item:hover i {
    transform: scale(1.2) rotate(360deg);
}

.radial-item span {
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* 加号按钮 */
.radial-menu-toggle {
    position: fixed;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    width: 54px;
    height: 54px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 50% 0 0 50%;
    color: white;
    font-size: 24px;
    cursor: pointer;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: -2px 0 15px rgba(0, 0, 0, 0.2);
}

.radial-menu-toggle:hover {
    transform: translateY(-50%) translateX(-5px);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.3);
}

.radial-menu-toggle i {
    margin-right: 2px;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.radial-menu-toggle.active i {
    transform: rotate(225deg);
}

/* 全屏菜单按钮 */
.fullscreen-menu-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 24px;
    cursor: pointer;
    z-index: 10002;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.fullscreen-menu-toggle.active {
    transform: rotate(90deg);
    background: transparent;
}

.fullscreen-menu-toggle:hover {
    transform: scale(1.1);
    background: var(--secondary-color);
}

.fullscreen-menu-toggle.active:hover {
    transform: rotate(90deg) scale(1.1);
}

/* 全屏菜单 */
.fullscreen-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10001;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    visibility: hidden;
}

/* 全屏菜单圆形扩散背景 */
.fullscreen-menu::before {
    content: '';
    position: fixed;
    width: 100vmax;
    height: 100vmax;
    top: var(--click-y, 50%);
    left: var(--click-x, 50%);
    transform: translate(-50%, -50%) scale(0);
    background: rgba(0, 51, 102, 0.55);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    transition: transform 0.5s ease-in-out;
}

.fullscreen-menu.active {
    pointer-events: auto;
    visibility: visible;
}

.fullscreen-menu.active::before {
    transform: translate(-50%, -50%) scale(1.5);
}

/* 菜单内容容器 */
.menu-content {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1200px;
    padding: 40px;
    opacity: 0;
    transform: scale(1.2);
    transition: opacity 0.3s ease-out 0.2s, transform 0.3s ease-out 0.2s;
}

.fullscreen-menu.active .menu-content {
    opacity: 1;
    transform: scale(1.2);
}

/* 菜单网格布局 */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.menu-category {
    color: white;
    text-align: center;
}

.menu-category h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--accent-color);
}

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

.menu-links a {
    color: white;
    text-decoration: none;
    font-size: 18px;
    padding: 10px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.menu-links a:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(10px);
}

/* 搜索栏 */
.menu-search {
    position: relative;
    max-width: 600px;
    margin: 40px auto 0;
    width: 100%;
}

.menu-search input {
    width: 100%;
    padding: 15px 20px;
    padding-right: 50px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    color: white;
    font-size: 18px;
    transition: all 0.3s ease;
}

.menu-search input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-color);
}

.menu-search input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.menu-search button {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: white;
    padding: 10px;
    cursor: pointer;
    font-size: 20px;
    transition: all 0.3s ease;
}

.menu-search button:hover {
    color: var(--accent-color);
    transform: translateY(-50%) scale(1.1);
}

/* 导航栏优化 */
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background: var(--nav-bg);
    color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* 导航菜单项过渡效果 */
.nav-menu li {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 导航栏菜单项动画 */
@keyframes slideInFromRight {
    from {
        transform: translateX(100px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.nav-menu li {
    opacity: 0;
    animation: slideInFromRight 0.5s ease forwards;
}

/* 菜单项延迟 */
.nav-menu li:nth-child(1) { animation-delay: 0.1s; }
.nav-menu li:nth-child(2) { animation-delay: 0.2s; }
.nav-menu li:nth-child(3) { animation-delay: 0.3s; }
.nav-menu li:nth-child(4) { animation-delay: 0.4s; }
.nav-menu li:nth-child(5) { animation-delay: 0.5s; }
.nav-menu li:nth-child(6) { animation-delay: 0.6s; }

/* 导航栏logo动画 */
.logo {
    font-size: 28px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
    opacity: 0;
    animation: slideInFromRight 0.5s ease forwards;
    animation-delay: 0s;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu li a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: var(--transition-smooth);
    position: relative;
}

.nav-menu li a:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background-color: var(--accent-color);
    transition: var(--transition-smooth);
    transform: translateX(-50%);
}

.nav-menu li a:hover:after {
    width: 100%;
}

/* 轮播图优化 */
.slider {
    position: relative;
    height: 600px;
    overflow: hidden;
}

.slide-content img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.8);
    transition: transform 0.5s ease;
}

.slide-content:hover img {
    transform: scale(1.05);
}

.slide-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    z-index: 1;
}

.slide-text h2 {
    font-size: 3em;
    margin-bottom: 1rem;
    animation: fadeInDown 1s ease;
}

.slide-text p {
    font-size: 1.5em;
    animation: fadeInUp 1s ease;
}

/* 内容区域优化 */
.about, .news, .campus-map {
    padding: 4rem 5%;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    margin: 2rem 0;
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.about:hover, .news:hover, .campus-map:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15),
                0 0 20px rgba(0, 51, 102, 0.3);
    border-color: rgba(255, 255, 255, 0.3);
}

/* 新闻卡片 */
.news-item {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15),
                0 0 20px rgba(0, 51, 102, 0.3);
    border-color: rgba(255, 255, 255, 0.3);
}

.news-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.news-item h3 {
    padding: 1.5rem;
    margin: 0;
}

.news-item p {
    padding: 0 1.5rem 1.5rem;
    margin: 0;
    color: var(--text-color);
}

/* 地图容器 */
.map-container {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.map-container:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15),
                0 0 20px rgba(0, 51, 102, 0.3);
    border-color: rgba(255, 255, 255, 0.3);
}

/* 深色模式适配 */
[data-theme="dark"] .about,
[data-theme="dark"] .news,
[data-theme="dark"] .campus-map,
[data-theme="dark"] .news-item,
[data-theme="dark"] .map-container {
    background: rgba(30, 30, 30, 0.4);
    border-color: rgba(255, 255, 255, 0.05);
}

.about h2, .news h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
    font-size: 2.5em;
    position: relative;
    padding-bottom: 1rem;
}

.about h2:after, .news h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.news-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.news-detail {
    max-width: 1000px;
    margin: 40px auto;
    padding: 20px;
}

.news-detail h1 {
    font-size: 28px;
    margin-bottom: 20px;
}

.news-meta {
    color: #666;
    margin-bottom: 20px;
}

.news-image {
    width: 100%;
    max-width: 800px;
    height: auto;
    margin: 20px 0;
}

.news-content {
    line-height: 1.8;
}

.news-content p {
    margin-bottom: 15px;
}

/* 页脚优化 */
footer {
    background: var(--footer-bg);
    color: white;
    padding: 3rem 5%;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
}

.footer-content h3 {
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    font-size: 1.5em;
}

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

.quick-links a {
    color: white;
    text-decoration: none;
    transition: var(--transition-smooth);
    display: block;
    padding: 0.5rem 0;
}

.quick-links a:hover {
    color: var(--accent-color);
    transform: translateX(10px);
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    margin-top: 2rem;
}

/* 侧边栏触发按钮 */
.sidebar-toggle {
    position: fixed;
    right: 20px;
    top: 20px;
    z-index: 1001;
    background: transparent;
    color: white;
    border: none;
    padding: 10px;
    cursor: pointer;
    font-size: 24px;
    transition: all 0.3s ease;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

.sidebar-toggle span {
    transition: transform 0.3s ease;
}

.sidebar-toggle.active span {
    transform: rotate(90deg);
}

/* 侧边栏 */
.sidebar {
    position: fixed;
    right: -300px;
    top: 0;
    width: 300px;
    height: 100%;
    background: rgba(0, 51, 102, 0.95);
    backdrop-filter: blur(10px);
    padding: 60px 0;
    z-index: 1000;
    transition: right 0.3s ease-in-out;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0);
    opacity: 0;
}

.sidebar.active {
    right: 0;
    animation: slideUpIn 0.5s ease-out forwards;
    opacity: 1;
    box-shadow: -2px 0 15px rgba(0, 0, 0, 0.2);
}

.sidebar ul li {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease-out;
}

.sidebar.active ul li {
    opacity: 1;
    transform: translateY(0);
}

/* 菜单项延迟 */
.sidebar.active ul li:nth-child(1) { transition-delay: 0.1s; }
.sidebar.active ul li:nth-child(2) { transition-delay: 0.2s; }
.sidebar.active ul li:nth-child(3) { transition-delay: 0.3s; }
.sidebar.active ul li:nth-child(4) { transition-delay: 0.4s; }
.sidebar.active ul li:nth-child(5) { transition-delay: 0.5s; }
.sidebar.active ul li:nth-child(6) { transition-delay: 0.6s; }

/* 侧边栏动画 */
@keyframes slideUpIn {
    from {
        transform: translateY(100px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.sidebar h3 {
    color: #ffffff;
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.5em;
    font-weight: normal;
}

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

.sidebar ul li {
    margin: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar ul li a {
    color: #ffffff;
    text-decoration: none;
    display: block;
    padding: 15px 30px;
    transition: all 0.3s ease;
    font-size: 16px;
}

.sidebar ul li a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    padding-left: 35px;
}

/* 关闭按钮 */
.close-sidebar {
    position: absolute;
    right: 20px;
    top: 20px;
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    transition: transform 0.3s ease;
    padding: 10px;
}

.close-sidebar:hover {
    transform: rotate(90deg);
}

/* 服务页面 */
.service-page {
    padding: 40px;
    max-width: 1200px;
    margin: 0 auto;
    background-color: #e6f7ff;
    border-radius: 8px;
}

/* 图书馆页面 */
.library-page {
    min-height: 100vh;
    background: url('images/lib.jpg') no-repeat center center/cover;
    width: 100%;
    position: relative;
}

.library-page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    z-index: 1;
}

.library-content {
    position: relative;
    z-index: 2;
}

.library-search {
    margin: 30px 0;
    text-align: center;
}

.search-box {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.library-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

/* 学工大厅页面 */
.affairs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.affairs-item {
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
}

/* 校长邮箱页面 */
.mail-form {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.submit-btn {
    background: #003366;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
}

/* 登录界面 */
.login-section {
    margin: 20px auto;
    padding: 20px;
    max-width: 400px;
    background-color: #f9f9f9;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.login-section h2 {
    margin-bottom: 20px;
    font-size: 1.5em;
    color: #333;
}

.login-form .form-group {
    margin-bottom: 15px;
    text-align: left;
}

.login-form label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #555;
}

.login-form input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1em;
}

.login-btn {
    width: 100%;
    padding: 10px;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 1em;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

/* 弹窗 */
@keyframes popup-slide-in {
    from {
        transform: translate(-50%, -60%);
        opacity: 0;
    }
    to {
        transform: translate(-50%, -50%);
        opacity: 1;
    }
}

@keyframes popup-slide-out {
    from {
        transform: translate(-50%, -50%);
        opacity: 1;
    }
    to {
        transform: translate(-50%, -60%);
        opacity: 0;
    }
}

@keyframes popup-move {
    0% {
        transform: translate(calc(50vw - 50%), calc(50vh - 50%));
    }
    100% {
        transform: translate(calc(var(--random-x, 50vw) - 50%), calc(var(--random-y, 50vh) - 50%));
    }
}

.popup {
    position: fixed;
    top: 20%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: red;
    color: yellow;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    text-align: center;
    z-index: 1000;
    display: none;
    animation: popup-slide-in 0.5s ease-out;
}

.popup.hide {
    animation: popup-slide-out 0.5s ease-out;
    opacity: 0;
    pointer-events: none;
}

.popup.moving {
    animation: popup-move 2s linear infinite alternate;
}

.popup p {
    margin: 0;
    font-size: 18px;
    font-weight: bold;
}

.popup .close-popup {
    margin-top: 10px;
    padding: 5px 10px;
    background-color: yellow;
    color: red;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.popup .close-popup:hover {
    background-color: #ffc107;
}

/* 动画 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .slider {
        height: 400px;
    }

    .slide-text h2 {
        font-size: 2em;
    }

    .slide-text p {
        font-size: 1.2em;
    }
}

/* 按钮优化 */
.btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--btn-bg);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-decoration: none;
}

.btn:hover {
    background: var(--btn-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

/* 卡片优化 */
.card {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: var(--transition-smooth);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.15);
}

/* 深色模式卡片和区块 */
[data-theme="dark"] .card,
[data-theme="dark"] .about,
[data-theme="dark"] .news {
    background: var(--card-bg);
}

[data-theme="dark"] .news-item {
    background: var(--card-bg);
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

/* 表单优化 */
.form-control {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 5px;
    transition: var(--transition-smooth);
    margin-bottom: 1rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0,51,102,0.1);
    outline: none;
}

/* 深色模式切换按钮 */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 10000;
    background: var(--btn-bg);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.theme-toggle:hover {
    transform: scale(1.15);
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    background: var(--btn-hover);
}

.theme-toggle i {
    color: #fff;
    font-size: 24px;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
}

.theme-toggle:hover i {
    transform: scale(1.2) rotate(360deg);
}

/* 卡片基础样式 */
.feature-card, .affairs-card, .info-card, .contact-card, .major-card, .stat-card, .campus-card, .lab-card {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.feature-card:hover, .affairs-card:hover, .info-card:hover, .contact-card:hover, 
.major-card:hover, .stat-card:hover, .campus-card:hover, .lab-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15),
                0 0 20px rgba(0, 51, 102, 0.3);
    border-color: rgba(255, 255, 255, 0.3);
}

/* 深色模式卡片基础样式 */
[data-theme="dark"] .feature-card,
[data-theme="dark"] .affairs-card,
[data-theme="dark"] .info-card,
[data-theme="dark"] .contact-card,
[data-theme="dark"] .major-card,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .campus-card,
[data-theme="dark"] .lab-card,
[data-theme="dark"] .news-item {
    background: rgba(30, 30, 30, 0.6);
    border: 1px solid rgba(51, 153, 255, 0.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2),
                inset 0 0 20px var(--card-glow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* 深色模式卡片悬停效果 */
[data-theme="dark"] .feature-card:hover,
[data-theme="dark"] .affairs-card:hover,
[data-theme="dark"] .info-card:hover,
[data-theme="dark"] .contact-card:hover,
[data-theme="dark"] .major-card:hover,
[data-theme="dark"] .stat-card:hover,
[data-theme="dark"] .campus-card:hover,
[data-theme="dark"] .lab-card:hover,
[data-theme="dark"] .news-item:hover {
    transform: translateY(-5px);
    border-color: var(--card-border-glow);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3),
                0 0 30px var(--card-glow-hover),
                inset 0 0 20px var(--card-glow-hover);
    background: rgba(30, 30, 30, 0.8);
}

/* 容器 */
.admission-section, .about-section, .contact-section, .library-content,
.academic-container, .affairs-container, .mail-container {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 深色模式容器 */
[data-theme="dark"] .admission-section,
[data-theme="dark"] .about-section,
[data-theme="dark"] .contact-section,
[data-theme="dark"] .library-content,
[data-theme="dark"] .academic-container,
[data-theme="dark"] .affairs-container,
[data-theme="dark"] .mail-container {
    background: rgba(30, 30, 30, 0.7);
    border: 1px solid rgba(51, 153, 255, 0.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3),
                inset 0 0 30px var(--card-glow);
}

/* 表单容器 */
.login-section, .search-section, .form-container {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 深色模式表单容器 */
[data-theme="dark"] .login-section,
[data-theme="dark"] .search-section,
[data-theme="dark"] .form-container {
    background: rgba(30, 30, 30, 0.7);
    border: 1px solid rgba(51, 153, 255, 0.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3),
                inset 0 0 20px var(--card-glow);
}

/* 深色模式适配 */
[data-theme="dark"] .feature-card,
[data-theme="dark"] .affairs-card,
[data-theme="dark"] .info-card,
[data-theme="dark"] .contact-card,
[data-theme="dark"] .major-card,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .campus-card,
[data-theme="dark"] .lab-card,
[data-theme="dark"] .admission-section,
[data-theme="dark"] .about-section,
[data-theme="dark"] .contact-section,
[data-theme="dark"] .library-content,
[data-theme="dark"] .academic-container,
[data-theme="dark"] .affairs-container,
[data-theme="dark"] .mail-container,
[data-theme="dark"] .login-section,
[data-theme="dark"] .search-section,
[data-theme="dark"] .form-container {
    background: rgba(30, 30, 30, 0.4);
    border-color: rgba(255, 255, 255, 0.05);
}

/* 页面背景渐变 */
.admission-page, .about-page, .contact-page, .library-page,
.academic-page, .affairs-page, .mail-page, .news-page {
    background: linear-gradient(135deg, #f5f7fa, #e4e7eb);
}

/* VR全景区域 */
.campus-vr {
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
    background: var(--background-color);
}

.campus-vr h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--primary-color);
    font-size: 2em;
}

.vr-container {
    display: flex;
    gap: 30px;
    align-items: center;
    background: var(--card-background);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.vr-left {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.vr-right {
    flex: 2;
}

.panorama-btn {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 25px 40px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-size: 18px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    width: 100%;
    max-width: 300px;
}

.panorama-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

.panorama-btn i {
    font-size: 2.5em;
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
}

.btn-title {
    font-size: 1.2em;
    font-weight: bold;
}

.btn-desc {
    font-size: 0.9em;
    opacity: 0.9;
}

.campus-overview {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

@media (max-width: 768px) {
    .vr-container {
        flex-direction: column;
        padding: 20px;
    }
    
    .vr-left, .vr-right {
        flex: none;
        width: 100%;
    }
    
    .panorama-btn {
        max-width: none;
    }
    
    .campus-overview {
        height: 300px;
    }
}

/* 友情链接样式 */
.friend-links {
    padding: 20px 0;
    border-top: 1px solid rgb(241, 241, 241);
    border-bottom: 1px solid rgba(255, 255, 255, 0.801);
    margin: 20px 0;
}

.friend-links h3 {
    font-size: 1.2em;
    color: var(--primary-color);
    margin-bottom: 15px;
    text-align: center;
}

.friend-links ul {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    list-style: none;
    padding: 0;
}

.friend-links ul li {
    position: relative;
}

.friend-links ul li a {
    color: var(--text-color);
    text-decoration: none;
    padding: 8px 15px;
    background: rgba(var(--primary-color-rgb), 0.1);
    border-radius: 20px;
    transition: all 0.3s ease;
    display: inline-block;
}

.friend-links ul li a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

/* 添加动画效果 */
.friend-links ul li a::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    bottom: -2px;
    left: 0;
    background: var(--primary-color);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.friend-links ul li a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}