/* 全局样式重置，确保不同浏览器的一致性 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 导入Google字体 */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&family=Roboto:wght@400;700&display=swap');

/* 设置主体字体和背景颜色，采用黄金比例配色 */
body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: #333333;
    background-color: #1E3A8A; /* 主色调：深蓝色 */
    padding-top: 80px; /* 为固定导航栏留出空间 */
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: linear-gradient(90deg, #1E3A8A, #4F9EFF); /* 渐变背景 */
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar .logo {
    font-family: 'Poppins', sans-serif;
    font-size: 24px;
    color: #FFFFFF;
}

.navbar .nav-links a {
    color: #FFFFFF;
    text-decoration: none;
    margin-left: 20px;
    transition: color 0.3s ease;
}

.navbar .nav-links a:hover {
    color: #FF9800; /* 点缀色：橙色 */
}

/* 主要内容容器 */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 0;
}

/* 标题样式 */
h2, h3 {
    font-family: 'Poppins', sans-serif;
    color: #1E3A8A;
    margin-bottom: 20px;
}

h2 {
    font-size: 28px;
}

h3 {
    font-size: 22px;
}

/* 段落样式 */
p {
    font-size: 16px;
    margin-bottom: 20px;
    color: #333333;
}

/* 按钮样式 */
.button {
    background-color: #FF9800;
    color: #FFFFFF;
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.button:hover {
    background-color: #e68900;
    transform: scale(1.05);
}

/* 图片样式：圆角、阴影、悬停效果 */
img.decorative {
    width: 100%;
    max-width: 320px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

img.decorative:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.2);
}

/* 模块化布局 */
.module {
    background-color: #F5F5F5; /* 辅助色 */
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 40px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.module:hover {
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.2);
    transform: translateY(-5px);
}

/* 代码块样式 */
pre code {
    background-color: #333333;
    color: #FFFFFF;
    padding: 15px;
    border-radius: 6px;
    overflow-x: auto;
    display: block;
    margin-bottom: 20px;
    font-family: 'Roboto', monospace;
    font-size: 14px;
}

/* 响应式设计：调整不同屏幕尺寸下的布局 */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .navbar .nav-links {
        display: none;
    }
    
    .navbar .menu-icon {
        display: block;
        cursor: pointer;
        color: #FFFFFF;
        font-size: 24px;
    }
    
    .navbar.active .nav-links {
        display: flex;
        flex-direction: column;
        width: 100%;
    }
    
    .navbar.active .nav-links a {
        margin: 10px 0;
    }

    .module {
        padding: 15px;
    }
}

/* 折叠区域样式 */
.collapsible {
    background-color: #FFFFFF;
    color: #333333;
    cursor: pointer;
    padding: 10px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 16px;
    border-radius: 4px;
    transition: background-color 0.3s ease;
    margin-bottom: 10px;
}

.collapsible:hover {
    background-color: #e0e0e0;
}

.content {
    padding: 0 18px;
    display: none;
    overflow: hidden;
    background-color: #f9f9f9;
    border-radius: 4px;
    margin-bottom: 20px;
}

/* 导航章节链接样式 */
.chapter-nav {
    position: fixed;
    top: 100px;
    right: 20px;
    background-color: rgba(255, 152, 0, 0.9);
    padding: 10px;
    border-radius: 8px;
}

.chapter-nav a {
    display: block;
    color: #FFFFFF;
    text-decoration: none;
    margin-bottom: 10px;
    transition: color 0.3s ease;
}

.chapter-nav a:hover {
    color: #1E3A8A;
}

/* 过渡与动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 1s ease-out forwards;
}

/* 表格样式 */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.table th, .table td {
    padding: 12px;
    border: 1px solid #DDDDDD;
    text-align: left;
}

.table tr:nth-child(even) {
    background-color: #F9F9F9;
}

.table th {
    background-color: #1E3A8A;
    color: #FFFFFF;
}

/* 工具提示样式 */
.tooltip {
    position: relative;
    display: inline-block;
    cursor: pointer;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 140px;
    background-color: #333333;
    color: #FFFFFF;
    text-align: center;
    border-radius: 6px;
    padding: 8px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -70px;
    opacity: 0;
    transition: opacity 0.3s;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

/* 数据可视化仪表盘样式 */
.dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    padding: 40px;
    background-color: #FFFFFF;
    border-radius: 8px;
}

.chart {
    background-color: #F5F5F5;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* AI客服窗口样式 */
.ai-chat {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 300px;
    height: 400px;
    background-color: #FFFFFF;
    border: 1px solid #CCCCCC;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transform: translateY(100%);
    transition: transform 0.5s ease-in-out;
}

.ai-chat.visible {
    transform: translateY(0);
}

/* 卡片组件样式 */
.card {
    background-color: #FFFFFF;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 20px;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.card:hover {
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    transform: translateY(-5px);
}

/* 表单输入框样式 */
input[type="text"], 
input[type="email"], 
input[type="password"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #CCCCCC;
    border-radius: 4px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    margin-bottom: 20px;
}

input[type="text"]:focus, 
input[type="email"]:focus, 
input[type="password"]:focus {
    border-color: #4F9EFF;
    box-shadow: 0 0 8px rgba(79, 158, 255, 0.5);
    outline: none;
}

/* 图标样式 */
.icon {
    font-family: 'Material Icons';
    font-size: 24px;
    color: #4F9EFF;
    transition: color 0.3s ease, transform 0.3s ease;
}

.icon:hover {
    color: #FF9800;
    transform: scale(1.2);
}