* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html, body {
            overflow-x: hidden;
            width: 100%;
        }
        
        body {
            font-family: 'Roboto', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f9f5f0;
            position: relative;
        }
        
        a {
            text-decoration: none;
            color: inherit;
        }
        
        ul {
            list-style: none;
        }
        
        img {
            max-width: 100%;
            height: auto;
        }
        
        /* 容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 头部导航 */
        .site-header {
            background: #fff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: transform 0.3s ease;
            width: 100%;
        }
        
        .site-header.hidden {
            transform: translateY(-100%);
        }
        
        .top-nav {
            background: #8b0000;
            color: #fff;
            padding: 8px 0;
            font-size: 14px;
            transition: transform 0.3s ease;
            width: 100%;
        }
        
        .top-nav.hidden {
            transform: translateY(-100%);
        }
        
        .top-menu {
            display: flex;
            justify-content: flex-end;
            align-items: center;
        }
        
        .top-menu li {
            margin: 0 10px;
        }
        
        .top-menu a {
            color: #fff;
            transition: color 0.3s;
        }
        
        .top-menu a:hover {
            color: #ffd700;
        }
        
        .main-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo img {
            height: 40px;
        }
        
        .site-title {
            margin-left: 10px;
            font-size: 20px;
            font-weight: bold;
            color: #8b0000;
        }
        
        .main-nav ul {
            display: flex;
        }
        
        .main-nav li {
            position: relative;
            margin: 0 15px;
        }
        
        .main-nav a {
            font-weight: 600;
            color: #333;
            padding: 10px 0;
            display: block;
            transition: color 0.3s;
        }
        
        .main-nav a:hover {
            color: #8b0000;
        }
        
        /* PC端二级菜单样式 - 纵向下拉菜单 */
        .sub-menu {
            position: absolute;
            top: 100%;
            left: 0;
            background: #fff;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            min-width: 100px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.3s;
            z-index: 100;
            /* 确保子菜单项始终垂直排列 */
            display: block !important;
        }
        
        .sub-menu li {
            margin: 0;
            border-bottom: 1px solid #f0f0f0;
            width: 100%;
        }
        
        .sub-menu a {
            padding: 12px 15px;
            white-space: nowrap;
            display: block;
            width: 100%;
        }
        
        .sub-menu a:hover {
            background-color: #f9f9f9;
            color: #8b0000;
        }
        
        .main-nav li:hover .sub-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        
        .mobile-menu-toggle {
            display: none;
            font-size: 24px;
            cursor: pointer;
        }
        
        /* 移动端菜单样式 - 从左侧滑出 */
        .mobile-menu-close {
            display: none;
            position: absolute;
            top: 15px;
            right: 15px;
            font-size: 24px;
            color: #8b0000;
            cursor: pointer;
            z-index: 1002;
        }
        
        .mobile-submenu-toggle {
            display: none;
            position: absolute;
            right: 0;
            top: 0;
            width: 40px;
            height: 40px;
            text-align: center;
            line-height: 40px;
            cursor: pointer;
            color: #8b0000;
        }
        
        /* 横幅区域 */
        .banner {
            position: relative;
            height: 250px;
            overflow: hidden;
            margin-bottom: 30px;
            width: 100%;
        }
        
        .banner-image {
            width: 100%;
            height: 100%;
            background: linear-gradient(rgba(0,0,0,0.4), rgba(0,0,0,0.4)), url('/skin/default/images/banner2.jpg') center/cover no-repeat;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .banner-content {
            text-align: center;
            color: #fff;
            text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.7);
            padding: 0 15px;
        }
        
        .banner-title {
            font-size: 48px;
            font-weight: bold;
            margin-bottom: 15px;
            animation: fadeInUp 1s;
        }
        
        .banner-subtitle {
            font-size: 24px;
            animation: fadeInUp 1s 0.5s both;
        }
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        /* 内容区域 */
        .content-section {
            padding: 50px 0;
            width: 100%;
        }
        
        .section-title {
            text-align: center;
            font-size: 32px;
            margin-bottom: 40px;
            color: #8b0000;
            position: relative;
        }
        
        .section-title:after {
            content: '';
            display: block;
            width: 80px;
            height: 3px;
            background: #8b0000;
            margin: 10px auto;
        }
        
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .article-card {
            background: #fff;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .article-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }
        
        .article-image {
            height: 200px;
            overflow: hidden;
        }
        
        .article-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        
        .article-card:hover .article-image img {
            transform: scale(1.05);
        }
        
        .article-content {
            padding: 20px;
        }
        
        .article-title {
            font-size: 18px;
            font-weight: bold;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        
        .article-excerpt {
            color: #666;
            margin-bottom: 15px;
            font-size: 14px;
            line-height: 1.6;
        }
        
        .article-meta {
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            color: #999;
        }
        
        /* 特色区域 */
        .features {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-bottom: 50px;
        }
        
        .feature-card {
            background: #fff;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
            transition: transform 0.3s;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
        }
        
        .feature-icon {
            font-size: 40px;
            color: #8b0000;
            margin-bottom: 20px;
        }
        
        .feature-title {
            font-size: 20px;
            font-weight: bold;
            margin-bottom: 15px;
        }
        
        .feature-desc {
            color: #666;
            line-height: 1.6;
        }
        
        /* 页脚 */
        .site-footer {
            background: #333;
            color: #fff;
            padding: 50px 0 20px;
            width: 100%;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-bottom: 30px;
        }
        
        .footer-column h3 {
            font-size: 18px;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-column h3:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background: #8b0000;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: #ccc;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: #8b0000;
        }
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #444;
            color: #999;
            font-size: 14px;
        }
        
        /* 移动端导航 */
        .mobile-nav {
            display: none;
            background: #fff;
            padding: 10px 0;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 99;
            box-shadow: 0 -4px 12px rgba(0,0,0,0.1);
            border-top: 1px solid #e9ecef;
            width: 100%;
        }
        
        .nav-buttons {
            display: flex;
            justify-content: space-around;
            align-items: center;
            max-width: 500px;
            margin: 0 auto;
        }
        
        .nav-button {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-decoration: none;
            color: #6c757d;
            padding: 5px 5px;
            border-radius: 12px;
            transition: all 0.3s;
            flex: 1;
            max-width: 65px;
        }
        
        .nav-button.active {
            color: #8b0000;
            background: rgba(139, 0, 0, 0.08);
        }
        
        .nav-button i {
            font-size: 16px;
            margin-bottom: 2px;
        }
        
        .nav-button span {
            font-size: 12px;
            font-weight: 500;
        }
        
        .nav-button:hover {
            background: rgba(139, 0, 0, 0.05);
            color: #8b0000;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .features {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 768px) {
            .top-nav {
                display: none;
            }
            
            .mobile-menu-toggle {
                display: block;
            }
            
            /* 移动端侧边栏导航 - 从左侧滑出 */
            .main-nav {
                position: fixed;
                top: 0;
                left: -260px; /* 从左侧滑出 */
                width: 260px;
                height: 100vh;
                background: #fff;
                box-shadow: 5px 0 15px rgba(0, 0, 0, 0.1); /* 阴影在右侧 */
                transition: left 0.3s;
                z-index: 1001;
                overflow-y: auto;
                padding: 20px 0;
            }
            
            .main-nav.active {
                left: 0; /* 滑入屏幕 */
            }
            
            .mobile-menu-close {
                display: block;
                transition: left 0.3s;
            }
            
            .main-nav.active .mobile-menu-close {
                right: 15px;
            }
            
            .main-nav ul {
                flex-direction: column;
            }
            
            .main-nav li {
                margin: 0;
                border-bottom: 1px solid #f0f0f0;
                position: relative;
            }
            
            /* 移动端菜单项样式 */
            .main-nav a {
                padding: 12px 20px;
                font-size: 15px;
            }
            
            .sub-menu {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                box-shadow: none;
                background: #f9f9f9;
                margin-left: 0;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.3s ease;
            }
            
            .sub-menu.active {
                max-height: 500px;
            }
            
            /* 子菜单项样式 */
            .sub-menu a {
                padding: 10px 20px 10px 35px;
                font-size: 14px;
            }
            
            .mobile-submenu-toggle {
                display: block;
                width: 35px;
                height: 35px;
                line-height: 35px;
            }
            
            .banner {
                height: 250px;
            }
            
            .banner-title {
                font-size: 36px;
            }
            
            .banner-subtitle {
                font-size: 18px;
            }
            
            .features {
                grid-template-columns: 1fr;
            }
            
            /* 移动端页脚只显示版权信息 */
            .footer-content {
                display: none;
            }
            
            .site-footer {
                padding: 20px 0;
            }
            
            .copyright {
                padding-top: 0;
                border-top: none;
            }
            
            .mobile-nav {
                display: block;
            }
            
            /* 缩小移动端头部 */
            .main-header {
                padding: 8px 0;
            }
            
            .logo img {
                height: 35px;
            }
            
            .site-title {
                font-size: 18px;
            }
        }
        
        @media (max-width: 576px) {
            .articles-grid {
                grid-template-columns: 1fr;
            }
            
            .banner {
                height: 200px;
            }
            
            .banner-title {
                font-size: 28px;
            }
            
            .banner-subtitle {
                font-size: 16px;
            }
            
            .section-title {
                font-size: 26px;
            }
        }