* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
        }
        
        /* 去除所有a标签的下划线 */
        a {
		  color: inherit;      /* 继承父元素颜色 */
		  text-decoration: none; /* 去除下划线 */
        }
        
        /* 顶部logo区域 */
        .top-header {
            background-color: #1a1a1a;
            color: #fff;
            padding: 20px 5%;
        }
        
        .logo-area {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        
        .logo {
            display: flex;
            align-items: center;
            font-size: 30px;
            font-weight: 700;
        }
        
        .logo img {
            width: 40px;
            height: 40px;
            margin-right: 12px;
        }
        
        .logo .xl {
            color: #4CAF50;
        }
        
        .logo .excel {
            color: #fff;
        }
        
        .site-desc {
            font-size: 16px;
            color: #aaa;
            margin-top: 5px;
            width: 100%;
        }
        
        /* 主导航栏 */
        .main-header {
            background-color: #2d3436;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 5%;
        }
        
        .main-nav {
            display: flex;
            list-style: none;
        }
        
        .main-nav > li {
            position: relative;
        }
        
        .main-nav > li > a {
            color: white;
            padding: 0 25px;
            height: 60px;
            display: flex;
            align-items: center;
            transition: all 0.3s;
            font-weight: 500;
            font-size: 16px;
        }
        
        .main-nav > li > a:hover, .main-nav > li > a.active {
            background-color: rgba(255, 255, 255, 0.1);
            color: #4CAF50;
        }
        
        /* 移动端汉堡菜单按钮 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
            padding: 5px 10px;
        }
        
        /* 搜索框样式 - 桌面端 */
        .search-container {
            display: flex;
            align-items: center;
        }
		.search-container svg {
			width: 24px;
			height: 24px;
			fill: #4CAF50;
			margin-right: 10px;
		}
        
        .search-form {
            position: relative;
            display: flex;
            align-items: center;
        }
        
        .search-input {
            width: 240px;
            padding: 10px 15px 10px 40px;
            border: none;
            border-radius: 20px;
            background-color: rgba(255, 255, 255, 0.1);
            color: white;
            font-size: 14px;
            transition: all 0.3s;
            outline: none;
        }
        
        .search-input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }
        
        .search-input:focus {
            width: 280px;
            background-color: rgba(255, 255, 255, 0.15);
            box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.3);
        }
        
        .search-button {
            position: absolute;
            left: 12px;
            background: none;
            border: none;
            color: rgba(255, 255, 255, 0.7);
            cursor: pointer;
            font-size: 16px;
            transition: color 0.3s;
        }
        
        .search-button:hover {
            color: #4CAF50;
        }
        
        .search-submit {
            display: none;
            background-color: #4CAF50;
            color: white;
            border: none;
            border-radius: 0 20px 20px 0;
            padding: 10px 15px;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s;
            margin-left: -1px;
        }
        
        .search-submit:hover {
            background-color: #3d8b40;
        }
        
        /* 二级导航下拉菜单 - 桌面端 */
        .secondary-dropdown {
            position: absolute;
            top: 100%;
            left: 0;
            background-color: white;
            min-width: 220px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            border-radius: 0 0 5px 5px;
            display: none;
            z-index: 200;
            padding: 0;
        }
        
        .secondary-dropdown li {
            width: 100%;
            position: relative;
            list-style: none;
        }
        
        .secondary-dropdown > li > a {
            color: #333;
            padding: 12px 20px;
            display: block;
            border-bottom: 1px solid #eee;
            transition: all 0.3s;
        }
        
        .secondary-dropdown > li > a:hover {
            background-color: #f8f9fa;
            color: #4CAF50;
        }
        
        .secondary-dropdown i.fa-chevron-right {
            float: right;
            font-size: 12px;
            color: #999;
            margin-top: 3px;
        }
        
        /* 三级导航下拉菜单 - 桌面端 */
        .tertiary-dropdown {
            position: absolute;
            top: 0;
            left: 100%;
            background-color: white;
            min-width: 220px;
            box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.1);
            border-radius: 0 5px 5px 5px;
            display: none;
            z-index: 300;
            padding: 0;
        }
        
        .tertiary-dropdown li {
            width: 100%;
            list-style: none;
        }
        
        .tertiary-dropdown a {
            color: #333;
            padding: 12px 20px;
            display: block;
            border-bottom: 1px solid #eee;
            transition: all 0.3s;
        }
        
        .tertiary-dropdown a:hover {
            background-color: #f8f9fa;
            color: #4CAF50;
        }
        
        /* 桌面端悬停效果 */
        .nav-item:hover .secondary-dropdown {
            display: block;
        }
        
        .secondary-dropdown > li:hover > .tertiary-dropdown {
            display: block;
        }
        
        /* 修复间隙问题 */
        .secondary-dropdown::before {
            content: '';
            position: absolute;
            top: -10px;
            left: 0;
            width: 100%;
            height: 10px;
            background: transparent;
        }
        
        .tertiary-dropdown::before {
            content: '';
            position: absolute;
            top: 0;
            left: -10px;
            width: 10px;
            height: 100%;
            background: transparent;
        }
        
        /* 内容区 */
        .main-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 30px 20px;
        }
        
        /* 二级导航标签区 */
        .sub-nav {
            background-color: white;
            border-radius: 8px;
            padding: 25px;
            margin-bottom: 40px;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
        }
        
        .sub-nav h2 {
            font-size: 20px;
            margin-bottom: 20px;
            color: #2d3436;
            display: flex;
            align-items: center;
        }
        
        .sub-nav h2 i {
            color: #4CAF50;
            margin-right: 10px;
        }
        
        .sub-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        
        .tag {
            background-color: #f8f9fa;
            padding: 10px 20px;
            border-radius: 25px;
            font-size: 15px;
            color: #555;
            transition: all 0.3s;
            cursor: pointer;
            border: 1px solid #eee;
        }
        
        .tag:hover, .tag.active {
            background-color: #4CAF50;
            color: white;
            border-color: #4CAF50;
        }
        
        
/* 教程文章列表 */
.section-title {
    font-size: 24px;
    margin: 30px 0 20px;
    color: #2d3436;
    display: flex;
    align-items: center;
}

.section-title svg {
    width: 24px;
    height: 24px;
    fill: #4CAF50;
    margin-right: 10px;
}
        
        .section-title i {
            color: #4CAF50;
            margin-right: 10px;
        }
        
        .tutorial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 25px;
            margin-bottom: 40px;
        }
        
        .tutorial-card {
            background-color: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s, box-shadow 0.3s;
            cursor: pointer;
        }
        
        .tutorial-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        .card-image {
            height: 200px;
            overflow: hidden;
        }
        
        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        
        .tutorial-card:hover .card-image img {
            transform: scale(1.05);
        }
        
        .card-content {
            padding: 20px;
        }
        
        .card-meta {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: #777;
            margin-bottom: 10px;
        }
        
        .card-date {
            color: #4CAF50;
            font-weight: 600;
        }
        
        .card-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: #2d3436;
        }
        
        .card-description {
            font-size: 14px;
            color: #666;
            line-height: 1.5;
        }
        
        /* 分页导航 */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            margin: 50px 0 30px;
        }
        .pagination svg {
			width: 24px;
			height: 24px;
			fill: #4CAF50;
			margin-right: 10px;
		}
        .pagination-list {
            display: flex;
            list-style: none;
            gap: 5px;
        }
        
        .pagination-item {
            margin: 0 2px;
        }
        
        .pagination-link {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 4px;
            background-color: white;
            color: #333;
            font-weight: 500;
            transition: all 0.3s;
            border: 1px solid #e0e0e0;
        }
        
        .pagination-link:hover {
            background-color: #f0f0f0;
            border-color: #4CAF50;
        }
        
        .pagination-link.active {
            background-color: #4CAF50;
            color: white;
            border-color: #4CAF50;
        }
        
        .pagination-prev, .pagination-next {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 8px 16px;
            border-radius: 4px;
            background-color: white;
            color: #333;
            font-weight: 500;
            transition: all 0.3s;
            border: 1px solid #e0e0e0;
            margin: 0 10px;
        }
        
        .pagination-prev:hover, .pagination-next:hover {
            background-color: #f0f0f0;
            border-color: #4CAF50;
        }
        
        .pagination-prev i, .pagination-next i {
            margin: 0 5px;
        }
        
        /* 回到顶部按钮 */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: #4CAF50;
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            cursor: pointer;
            transition: all 0.3s;
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
            border: none;
        }
        
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        
        .back-to-top:hover {
            background-color: #3d8b40;
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(76, 175, 80, 0.4);
        }
        
        /* 页脚 */
        .footer {
            background-color: #2d3436;
            color: #aaa;
            padding: 40px 0;
            margin-top: 50px;
        }
        
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .footer-logo {
            font-size: 20px;
            font-weight: 700;
        }
        
        .footer-logo .xl {
            color: #4CAF50;
        }
        
        .copyright {
            font-size: 14px;
        }
        
        /* 响应式设计 */
        @media (max-width: 1200px) {
            .search-input {
                width: 200px;
            }
            
            .search-input:focus {
                width: 240px;
            }
        }
        
        @media (max-width: 992px) {
            .tutorial-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
            
            .main-nav > li > a {
                padding: 0 15px;
            }
            
            .logo {
                font-size: 26px;
            }
            
            .logo img {
                width: 36px;
                height: 36px;
            }
            
            .site-desc {
                font-size: 14px;
            }
            
            .search-input {
                width: 180px;
            }
            
            .search-input:focus {
                width: 220px;
            }
        }
        
        /* 移动端导航栏重新设计 */
        @media (max-width: 768px) {
            .top-header {
                padding: 15px 20px;
            }
            
            .logo-area {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .site-desc {
                margin-top: 10px;
                width: 100%;
            }
            
            /* 移动端汉堡菜单按钮 */
            .menu-toggle {
                display: block;
                order: 1;
            }
            
            .nav-container {
                flex-wrap: wrap;
                padding: 0 15px;
                position: relative;
            }
            
            /* 移动端导航菜单 - 只显示一级导航 */
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                position: absolute;
                top: 60px;
                left: 0;
                background-color: #2d3436;
                z-index: 1000;
                box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
                padding: 0;
                margin: 0;
            }
            
            .main-nav.active {
                display: flex;
            }
            
            .main-nav > li {
                width: 100%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            
            .main-nav > li:last-child {
                border-bottom: none;
            }
            
            .main-nav > li > a {
                height: auto;
                padding: 15px 20px;
                font-size: 16px;
            }
            
            /* 在移动端隐藏所有下拉菜单和下拉箭头 */
            .secondary-dropdown,
            .tertiary-dropdown,
            .main-nav i.fa-chevron-down,
            .secondary-dropdown i.fa-chevron-right {
                display: none !important;
            }
            
            /* 移动端搜索框 - 背景色与导航栏不同，更醒目 */
            .search-container {
                order: 2;
                width: 100%;
                margin: 10px 0;
            }
            
            .search-form {
                width: 100%;
                background-color: #4CAF50; /* 绿色背景，更醒目 */
                border-radius: 4px;
                padding: 5px;
            }
            
            .search-input {
                width: 100%;
                padding: 12px 15px 12px 45px;
                font-size: 16px;
                background-color: white; /* 白色输入框，与绿色背景形成对比 */
                color: #333;
                border-radius: 4px 0 0 4px;
            }
            
            .search-input::placeholder {
                color: #999;
            }
            
            /* 移动端显示提交按钮 */
            .search-submit {
                display: block;
                border-radius: 0 4px 4px 0;
                padding: 12px 20px;
            }
            
            .search-button {
                left: 20px;
                color: #666;
            }
            
            .footer-content {
                flex-direction: column;
                text-align: center;
                gap: 20px;
            }
            
            .sub-tags {
                justify-content: center;
            }
            
            .back-to-top {
                bottom: 15px;
                right: 15px;
                width: 40px;
                height: 40px;
                font-size: 16px;
            }
            
            /* 移动端分页导航调整 */
            .pagination {
                flex-wrap: wrap;
            }
            
            .pagination-prev, .pagination-next {
                margin: 5px;
            }
        }
        
        @media (max-width: 576px) {
            .tutorial-grid {
                grid-template-columns: 1fr;
            }
            
            .main-nav > li > a {
                padding: 12px 15px;
                font-size: 15px;
            }
            
            .logo {
                font-size: 24px;
            }
            
            .logo img {
                width: 32px;
                height: 32px;
            }
            
            .sub-tags {
                justify-content: center;
            }
            
            .sub-nav {
                padding: 20px;
            }
            
            .tag {
                padding: 8px 16px;
                font-size: 14px;
            }
            
            .pagination-list {
                flex-wrap: wrap;
                justify-content: center;
            }
        }
        
        /* 屏幕宽度过小时，导航栏和搜索框的显示方式 */
        @media (max-width: 870px) {
            .search-container {
                order: 3;
                width: 100%;
                margin: 10px 0;
            }
            
            .search-form {
                width: 100%;
            }
        }
        
        .card-link {
            display: block;
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }
        
        .card-link:hover {
            opacity: 0.9;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        /* 确保article内部的原有样式不受影响 */
        .card-link .tutorial-card {
            cursor: pointer;
        }
		
		/* 分割线样式 */
		.article-content .article-divider {
			margin: 30px 0 20px 0;
			border: none;
			border-top: 1px solid #e0e0e0;
			clear: both;
		}
		
		/* 按钮容器右对齐 */
		.official-website-container {
			text-align: right;
			margin-bottom: 20px;
		}
		
		/* 官方网址按钮样式 */
		.official-website-btn {
			display: inline-block;
			padding: 8px 20px;
			background-color: #0066cc;
			color: white;
			text-decoration: none;
			border-radius: 4px;
			font-weight: 500;
			transition: all 0.3s ease;
			border: none;
			cursor: pointer;
			font-size: 14px;
		}
		
		.official-website-btn:hover {
			background-color: #0052a3;
			text-decoration: none;
			transform: translateY(-2px);
			box-shadow: 0 3px 8px rgba(0, 102, 204, 0.3);
		}
		
		/* 移动端适配 */
		@media (max-width: 768px) {
			.official-website-container {
				text-align: center; /* 移动端居中显示 */
			}
			
			.official-website-btn {
				padding: 10px 24px;
				font-size: 15px;
				width: 100%;
				max-width: 200px;
			}
		}
		
/* 修改顶部header为flex布局 */
.top-header {
    background-color: #1a1a1a;
    color: #fff;
    padding: 20px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    position: relative;
}

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

/* 右侧链接区域样式 */
.header-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* 多语言切换器样式 */
.language-switcher {
    position: relative;
    display: inline-block;
}

/* 隐藏的复选框 */
.language-checkbox {
    display: none;
}

/* 语言切换按钮样式 */
.language-toggle {
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 4px 4px 0 0; /* 顶部圆角，底部直角 */
    transition: all 0.3s ease;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    line-height: 1;
    outline: none;
    position: relative; /* 为下拉菜单连接区域定位 */
    z-index: 1; /* 确保在连接区域之上 */
}

.language-toggle:hover {
    background-color: rgba(255, 255, 255, 0.2);
    color: #4CAF50;
}

.language-toggle:focus {
    box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.5);
}

/* 地球图标样式 */
.globe-icon {
    font-size: 16px;
    line-height: 1;
}

/* 下拉箭头样式 */
.dropdown-arrow {
    font-size: 10px;
    opacity: 0.8;
    transition: transform 0.3s ease;
    margin-left: 2px;
}

/* 语言下拉菜单 - 解决间隙问题 */
.language-dropdown {
    position: absolute;
    top: 100%; /* 紧贴按钮底部 */
    left: 0;
    background-color: #fff;
    min-width: 160px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    border-radius: 0 0 4px 4px; /* 底部圆角，顶部直角 */
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-5px); /* 轻微上移，动画用 */
    transition: all 0.3s ease;
    pointer-events: none; /* 默认不可点击 */
    border-top: none; /* 移除顶部边框，与按钮无缝连接 */
}

/* 关键：创建鼠标过渡区域，防止间隙中断悬停 */
.language-switcher::after {
    content: '';
    position: absolute;
    top: 100%; /* 从按钮底部开始 */
    left: 0;
    width: 100%;
    height: 5px; /* 连接区域高度 */
    background-color: transparent;
    z-index: 1999; /* 在下拉菜单之下，按钮之上 */
    pointer-events: none; /* 默认不接收事件 */
}

/* 桌面端：鼠标悬停时显示下拉菜单 */
@media (min-width: 769px) {
    .language-switcher:hover .language-dropdown {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        pointer-events: auto; /* 允许点击 */
    }
    
    .language-switcher:hover .language-toggle .dropdown-arrow {
        transform: rotate(180deg);
    }
    
    /* 悬停时激活连接区域 */
    .language-switcher:hover::after {
        pointer-events: auto; /* 激活连接区域 */
    }
    
    /* 悬停时按钮底部改为直角，与下拉菜单无缝连接 */
    .language-switcher:hover .language-toggle {
        border-radius: 4px 4px 0 0;
    }
}

/* 移动端：通过复选框控制下拉菜单 */
@media (max-width: 768px) {
    /* 复选框选中时显示下拉菜单 */
    .language-checkbox:checked + .language-toggle ~ .language-dropdown {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        pointer-events: auto;
    }
    
    .language-checkbox:checked + .language-toggle .dropdown-arrow {
        transform: rotate(180deg);
    }
    
    /* 移动端下拉菜单样式 */
    .language-dropdown {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        z-index: 2000;
        max-height: 0;
        overflow: hidden;
    }
    
    .language-checkbox:checked + .language-toggle ~ .language-dropdown {
        max-height: 300px;
        overflow-y: auto;
    }
}

/* 语言选项样式 */
.language-option {
    display: block;
    padding: 10px 16px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    border-bottom: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.language-option:hover {
    background-color: #f8f9fa;
    color: #4CAF50;
}

.language-option:last-child {
    border-bottom: none;
}

/* 当前语言高亮 */
.current-language {
    font-weight: 600;
    color: #4CAF50;
    background-color: rgba(76, 175, 80, 0.05);
}

/* 捐助链接样式 */
.donate-link {
    display: flex;
    align-items: center;
    gap: 6px;
    color: #ff4081;
    font-size: 14px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 4px;
    transition: all 0.3s ease;
    background-color: rgba(255, 64, 129, 0.1);
    border: 1px solid rgba(255, 64, 129, 0.2);
    text-decoration: none;
}

.donate-link:hover {
    background-color: rgba(255, 64, 129, 0.2);
    color: #e91e63;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(255, 64, 129, 0.2);
}

/* 心形图标样式 */
.heart-icon {
    font-size: 16px;
    line-height: 1;
    color: #ff0000;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .top-header {
        padding: 15px 20px;
        flex-direction: column;
        align-items: flex-start;
    }
    
    .header-links {
        width: 100%;
        margin-top: 15px;
        margin-left: 0;
        padding-left: 0;
        justify-content: flex-start;
    }
    
    .language-toggle,
    .donate-link {
        font-size: 13px;
        padding: 6px 12px;
    }
}

/* 小屏幕移动端适配 */
@media (max-width: 576px) {
    .header-links {
        margin-top: 10px;
        gap: 10px;
    }
    
    .language-toggle,
    .donate-link {
        padding: 6px 10px;
        font-size: 12px;
    }
}

/* 针对更小的移动设备优化 */
@media (max-width: 400px) {
    .header-links {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .language-switcher,
    .donate-link {
        flex: none;
        min-width: 120px;
    }
    
    .language-toggle {
        text-align: center;
        justify-content: center;
    }
}