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

body {
    font-family: "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 头部样式 */
.header {
    background-color: #1e50a2;
    padding: 15px 0;
    position: fixed !important;
    width: 100% !important;
    top: 0 !important;
    left: 0 !important;
    z-index: 9999 !important;
}

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

.logo h1 {
    color: #fff;
    font-size: 24px;
}

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

.nav ul li {
    margin-left: 30px;
}

.nav ul li a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s;
}

.nav ul li a:hover,
.nav ul li a.active {
    color: #ffd700;
}

/* 主要内容区域 */
main,
.about-layout,
.contact-layout,
.achievements-layout,
.admission-layout {
    margin-top: 70px !important;
}

/* 轮播图区域 */
.banner {
    background-color: #f5f5f5;
    padding: 60px 0;
    text-align: center;
}

.banner-content h2 {
    font-size: 36px;
    color: #1e50a2;
    margin-bottom: 20px;
}

/* 章节标题 */
.section-title {
    text-align: center;
    font-size: 28px;
    color: #1e50a2;
    margin: 40px 0 30px;
}

/* 新闻列表 */
.news {
    padding: 40px 0;
}

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

/* 成果展示 */
.achievements {
    padding: 40px 0;
    background-color: #f5f5f5;
}

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

/* 页脚样式 */
.footer {
    background-color: #1e50a2;
    color: #fff;
    padding: 40px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer h3 {
    font-size: 20px;
    margin-bottom: 20px;
}

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

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

.footer-links ul li a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links ul li a:hover {
    color: #ffd700;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        text-align: center;
    }

    .nav ul {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav ul li {
        margin: 5px 15px;
    }

    .banner-content h2 {
        font-size: 28px;
    }
}

/* 侧边栏移动端优化 */
@media (max-width: 900px) {
    .about-layout,
    .contact-layout,
    .achievements-layout {
        flex-direction: column;
    }
    .about-sidebar,
    .contact-sidebar,
    .achievements-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
        display: block;
        margin-bottom: 16px;
    }
    .about-content,
    .contact-content,
    .achievements-content {
        padding: 24px 10px;
    }
}
@media (max-width: 600px) {
    .about-content,
    .contact-content,
    .achievements-content {
        padding: 14px 4px;
    }
    main,
    .about-layout,
    .contact-layout,
    .achievements-layout {
        margin-top: 90px !important;
    }
}

:root {
    --sidebar-width: 240px;
    --sidebar-bg: #f8f9fa;
    --sidebar-border: 1px solid #e0e0e0;
    --content-padding-desktop: 40px 48px;
    --content-padding-tablet: 24px 10px;
    --content-padding-mobile: 14px 4px;
    --sidebar-radius: 0px;
}

.about-layout, .contact-layout, .achievements-layout, .admission-layout {
    display: flex !important;
    min-height: 600px !important;
    margin-top: 40px !important;
}

.about-sidebar, .contact-sidebar, .achievements-sidebar, .admission-sidebar {
    width: var(--sidebar-width) !important;
    background: var(--sidebar-bg) !important;
    border-right: var(--sidebar-border) !important;
    padding: 30px 0 30px 0 !important;
    border-radius: var(--sidebar-radius) !important;
    position: sticky !important;
    top: 70px !important;
    align-self: flex-start !important;
    max-height: calc(100vh - 70px) !important;
    overflow-y: auto !important;
}

.about-content, .contact-content, .achievements-content, .admission-content {
    flex: 1 !important;
    padding: var(--content-padding-desktop) !important;
}

@media (max-width: 900px) {
    .about-layout, .contact-layout, .achievements-layout, .admission-layout {
        flex-direction: column !important;
    }
    .about-sidebar, .contact-sidebar, .achievements-sidebar, .admission-sidebar {
        width: 100% !important;
        border-right: none !important;
        border-bottom: 1px solid #e0e0e0 !important;
        display: block !important;
        margin-bottom: 16px !important;
        position: relative !important;
        top: 0 !important;
        max-height: none !important;
    }
    .about-content, .contact-content, .achievements-content, .admission-content {
        padding: var(--content-padding-tablet) !important;
    }
}
@media (max-width: 600px) {
    .about-content, .contact-content, .achievements-content, .admission-content {
        padding: var(--content-padding-mobile) !important;
    }
}

/* 新增的南华大学核科学技术学院链接样式 */
.footer-links ul li a:hover {
    color: #ffd700;
}

.footer-links ul li a:hover {
    color: #ffd700;
}