/* css/style.css */
:root {
    --primary-red: #c62f2f; /* 主红色 */
    --dark-red: #a52a2a;     /* 深红，用于hover */
    --light-red: #f8d7da;    /* 浅红，用于背景等 */
    --text-dark: #333;       /* 主要文字色 */
    --text-light: #666;      /* 次要文字色 */
    --bg-gray: #f5f5f5;      /* 背景灰 */
    --white: #fff;
}

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

body {
    font-family: "Microsoft YaHei", "SimHei", sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-gray);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* ===== 头部样式 ===== */
.site-header {
    background-color: var(--primary-red);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

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

.logo img {
    height: 50px;
    margin-right: 15px;
}

.logo h1 {
    font-size: 1.5rem;
}

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

.main-nav a {
    color: var(--white);
    text-decoration: none;
    padding: 0.5rem 1rem;
    display: block;
    transition: background-color 0.3s;
}

.main-nav a:hover {
    background-color: var(--dark-red);
    border-radius: 4px;
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}
/* ===== Banner区样式优化 ===== */
.banner {
    width: 100%;
    position: relative;
    overflow: hidden;
    background-color: var(--primary-red); /* 备用背景色 */
}

.banner-img {
    width: 100%;
    height: auto;
    display: block;
}

/* 方案1：固定高度Banner（推荐） */
.banner-container {
    width: 100%;
    height: 400px; /* PC端高度 */
    overflow: hidden;
    position: relative;
}

.banner-container img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* 关键属性：保持图片比例并覆盖整个区域 */
    object-position: center; /* 图片居中显示 */
}

/* ===== 首页核心内容区 ===== */
.news-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.news-column {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    border-top: 3px solid var(--primary-red);
}

.news-column h2 a {
    color: var(--primary-red);
    text-decoration: none;
    border-bottom: 1px solid transparent;
}

.news-column h2 a:hover {
    border-bottom: 1px solid var(--primary-red);
}

.news-list {
    list-style: none;
    margin: 1rem 0;
}

.news-list li {
    padding: 0.5rem 0;
    border-bottom: 1px dashed #eee;
}

.news-list li a {
    color: var(--text-dark);
    text-decoration: none;
}

.news-list li a:hover {
    color: var(--primary-red);
}

.news-list li span {
    color: var(--text-light);
    font-size: 0.9rem;
    float: right;
}

.more-link {
    color: var(--primary-red);
    text-decoration: none;
    font-weight: bold;
}

/* ===== 页脚样式 ===== */
.site-footer {
    background-color: var(--primary-red);
	box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    color: #ccc;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 2rem;
}

/* ===== 响应式设计：平板和手机 ===== */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .main-nav {
        display: none;
        width: 100%;
        position: absolute;
        top: 100%;
        left: 0;
        background-color: var(--dark-red);
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
    }

    .main-nav a {
        padding: 1rem;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }

    .logo h1 {
        font-size: 1.2rem;
    }

    .news-highlights {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

/* ===== 头部样式 ===== */
.site-header {
    background-color: var(--primary-red);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: relative; /* 为绝对定位的子菜单提供参考 */
}

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

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

.logo img {
    height: 50px;
    margin-right: 15px;
}

.logo h1 {
    font-size: 1.5rem;
}

.main-nav {
    transition: all 0.3s ease;
}

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

.main-nav a {
    color: var(--white);
    text-decoration: none;
    padding: 0.5rem 1rem;
    display: block;
    transition: background-color 0.3s;
}

.main-nav a:hover {
    background-color: var(--dark-red);
    border-radius: 4px;
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* ===== 响应式设计：平板和手机 ===== */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .main-nav {
        display: none;
        width: 100%;
        position: absolute;
        top: 100%;
        left: 0;
        background-color: var(--dark-red);
        z-index: 1000;
        box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        width: 100%;
    }

    .main-nav li {
        width: 100%;
    }

    .main-nav a {
        padding: 1rem 1.5rem;
        border-bottom: 1px solid rgba(255,255,255,0.1);
        width: 100%;
    }

    .main-nav a:hover {
        background-color: rgba(255,255,255,0.1);
    }

    .logo h1 {
        font-size: 1.2rem;
    }

    .news-highlights {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}
/* ===== 列表页和内容页布局 ===== */
.list-container {
    display: flex;
    gap: 2rem;
    margin: 2rem auto;
    align-items: flex-start;
}

/* 左侧导航样式 */
.sidebar {
    flex: 0 0 280px;
    background: var(--white);
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    overflow: hidden;
}

.sidebar-nav, .sidebar-widget {
    padding: 1.5rem;
    border-bottom: 1px solid #eee;
}

.sidebar-nav:last-child, .sidebar-widget:last-child {
    border-bottom: none;
}

.sidebar h3 {
    color: var(--primary-red);
    font-size: 1.1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--light-red);
}

.sidebar ul {
    list-style: none;
}

.sidebar li {
    margin-bottom: 0.5rem;
}

.sidebar a {
    color: var(--text-dark);
    text-decoration: none;
    padding: 0.5rem 0;
    display: block;
    transition: all 0.3s;
    border-left: 3px solid transparent;
    padding-left: 0.5rem;
}

.sidebar a:hover {
    color: var(--primary-red);
    border-left-color: var(--primary-red);
    background-color: var(--light-red);
}

.sidebar li.active a {
    color: var(--primary-red);
    border-left-color: var(--primary-red);
    background-color: var(--light-red);
    font-weight: bold;
}

/* 右侧内容区 */
.content-main {
    flex: 1;
    min-width: 0; /* 防止flex内容溢出 */
}

/* 文章列表样式 */
.article-list {
    background: var(--white);
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    overflow: hidden;
}

.article-item {
    padding: 1.5rem;
    border-bottom: 1px solid #eee;
    transition: background-color 0.3s;
}

.article-item:hover {
    background-color: #f9f9f9;
}

.article-item:last-child {
    border-bottom: none;
}

.article-item h2 {
    margin-bottom: 0.5rem;
}

.article-item h2 a {
    color: var(--text-dark);
    text-decoration: none;
    font-size: 1.2rem;
}

.article-item h2 a:hover {
    color: var(--primary-red);
}

.meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.excerpt {
    color: var(--text-light);
    line-height: 1.6;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2rem;
    padding: 1rem;
}

.pagination a {
    padding: 0.5rem 1rem;
    border: 1px solid #ddd;
    color: var(--text-dark);
    text-decoration: none;
    border-radius: 3px;
    transition: all 0.3s;
}

.pagination a:hover, .pagination a.active {
    background-color: var(--primary-red);
    color: var(--white);
    border-color: var(--primary-red);
}

/* 文章详情页样式 */
.article-detail {
    background: var(--white);
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    padding: 2rem;
}

.article-header {
    border-bottom: 2px solid var(--light-red);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.article-header h1 {
    color: var(--text-dark);
    font-size: 1.8rem;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.article-meta {
    color: var(--text-light);
    font-size: 0.9rem;
}

.article-meta span {
    margin-right: 1.5rem;
}

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

.article-content h2 {
    color: var(--primary-red);
    margin: 1.5rem 0 1rem 0;
    font-size: 1.3rem;
}

.article-content p {
    margin-bottom: 1rem;
    text-align: justify;
}

.article-content blockquote {
    border-left: 4px solid var(--primary-red);
    background-color: var(--light-red);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    font-style: italic;
}

.article-footer {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid #eee;
}

.tags a {
    display: inline-block;
    background: var(--light-red);
    color: var(--primary-red);
    padding: 0.3rem 0.8rem;
    margin: 0.3rem;
    border-radius: 3px;
    text-decoration: none;
    font-size: 0.9rem;
}

.tags a:hover {
    background: var(--primary-red);
    color: var(--white);
}

.article-nav {
    margin-top: 1.5rem;
}

.prev-article, .next-article {
    margin: 0.5rem 0;
}

.article-nav a {
    color: var(--primary-red);
    text-decoration: none;
}

.article-nav a:hover {
    text-decoration: underline;
}

/* ===== 响应式设计：平板和手机 ===== */
@media (max-width: 768px) {
    /* ... 之前的移动端样式保持不变 ... */
    
    /* 列表页和内容页响应式 */
    .list-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .sidebar {
        flex: none;
        width: 100%;
        order: 2; /* 在移动端让侧边栏显示在主要内容后面 */
    }
    
    .content-main {
        order: 1;
    }
    
    .article-header h1 {
        font-size: 1.4rem;
    }
    
    .article-meta span {
        display: block;
        margin-right: 0;
        margin-bottom: 0.3rem;
    }
    
    .pagination {
        flex-wrap: wrap;
    }
    
    .pagination a {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .article-detail {
        padding: 1rem;
    }
    
    .article-header h1 {
        font-size: 1.2rem;
    }
    
    .tags a {
        font-size: 0.8rem;
        padding: 0.2rem 0.6rem;
        margin: 0.2rem;
    }
}