/* 全局样式设置，包括字体、颜色和基础布局 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Source Sans Pro', sans-serif; /* 使用无衬线字体，提升可读性 */
    color: #0A3D62; /* 主文本颜色，深蓝色传达专业与稳定 */
    background: linear-gradient(135deg, #2D3748 70%, #F7FAFC 25%, #34C759 5%); /* 背景运用渐变，遵循黄金比例配色 */
    line-height: 1.6;
}

/* 导航栏样式 */
.navbar {
    background: linear-gradient(90deg, #0A3D62, #3C85FF); /* 渐变背景，增强视觉深度 */
    padding: 20px;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1); /* 轻微阴影，增加立体感 */
}

/* 导航栏中的品牌Logo */
.navbar .logo {
    font-size: 1.5em;
    font-weight: bold;
    color: #FFFFFF; /* 白色字体，与背景形成对比 */
}

/* 导航链接样式 */
.navbar ul {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

.navbar ul li {
    margin-left: 20px;
}

.navbar ul li a {
    color: #FFFFFF;
    text-decoration: none;
    font-size: 1em;
    position: relative;
    transition: color 0.3s ease;
}

.navbar ul li a:hover {
    color: #34C759; /* 点缀色，悬停时颜色变化吸引注意 */
}

/* 主容器样式 */
.container {
    max-width: 1200px;
    margin: 100px auto 0 auto; /* 顶部留出导航栏空间 */
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); /* 使用响应式网格布局 */
    gap: 20px;
}

/* 模块样式，独立成块 */
.module {
    background-color: #FFFFFF;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    padding: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.module:hover {
    transform: translateY(-10px); /* 悬停时轻微提升，增加互动感 */
    box-shadow: 0 8px 12px rgba(0,0,0,0.2);
}

/* 图片样式，圆角、阴影及悬浮效果 */
.module img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.module img:hover {
    transform: scale(1.05); /* 悬浮时微放大图片 */
}

/* 标题样式 */
h2, h3, h4 {
    color: #0A3D62;
    margin-bottom: 15px;
}

h2 {
    font-size: 2em;
}

h3 {
    font-size: 1.5em;
}

h4 {
    font-size: 1.2em;
}

/* 正文段落样式 */
p {
    font-size: 1em;
    margin-bottom: 15px;
    color: #333333;
}

/* 按钮样式 */
.button {
    background-color: #FF6F61; /* 点缀色按钮 */
    color: #FFFFFF;
    padding: 10px 20px;
    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: #FF3B30;
    transform: scale(1.05); /* 悬停时按钮放大 */
}

/* 响应式设计，调整不同屏幕下的布局 */
@media (max-width: 768px) {
    .navbar ul {
        flex-direction: column;
        background-color: #0A3D62;
        position: absolute;
        top: 60px;
        right: 0;
        width: 200px;
        display: none;
    }

    .navbar ul.active {
        display: flex;
    }

    .navbar .menu-toggle {
        display: block;
        cursor: pointer;
    }

    .container {
        grid-template-columns: 1fr;
    }
}

/* 动画关键帧，数据流动效果 */
@keyframes dataFlow {
    0% {
        stroke-dashoffset: 1000;
    }
    100% {
        stroke-dashoffset: 0;
    }
}

/* SVG动画样式 */
.svg-animated path {
    stroke: #3C85FF;
    stroke-width: 2;
    fill: none;
    stroke-dasharray: 1000;
    animation: dataFlow 5s linear infinite;
}

/* 代码块样式，区别于正文 */
pre {
    background-color: #F5F5F5;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    margin-bottom: 15px;
}

code {
    color: #D14;
    background-color: #F5F5F5;
    padding: 2px 4px;
    border-radius: 4px;
}

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

table th, table td {
    border: 1px solid #DDD;
    padding: 10px;
    text-align: left;
}

table th {
    background-color: #F0F0F0;
}

/* 强调文本 */
strong {
    color: #0A3D62;
}

/* 链接样式 */
a {
    color: #3C85FF;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #34C759;
}

/* 提示文字样式 */
.highlight {
    background-color: #FFEB3B;
    padding: 2px 4px;
    border-radius: 4px;
}

/* 固定导航栏的滚动效果 */
.navbar.scrolled {
    background-color: #0A3D62;
    transition: background-color 0.3s ease;
}

/* 交互式图表样式 */
.chart {
    position: relative;
    width: 100%;
    height: 300px;
    background-color: #FFFFFF;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.chart:hover .bar {
    transform: scaleY(1.1);
}

.bar {
    width: 30px;
    height: 100px;
    background-color: #3C85FF;
    margin: 0 10px;
    display: inline-block;
    transition: transform 0.3s ease;
}

/* 折叠区域样式 */
.collapsible {
    background-color: #F7FAFC;
    color: #0A3D62;
    cursor: pointer;
    padding: 10px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 1em;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.collapsible:hover {
    background-color: #E2E8F0;
}

.content {
    padding: 0 18px;
    display: none;
    overflow: hidden;
    background-color: #F7FAFC;
    border-left: 2px solid #3C85FF;
}

/* 提示文字的样式 */
.reference {
    text-align: center;
    font-size: 1.2em;
    color: #FF6F61;
    margin: 20px 0;
}

/* 图片装饰样式 */
.decorative-image {
    border-radius: 50%;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.decorative-image:hover {
    transform: rotate(10deg) scale(1.05);
}

/* 按钮点击反馈 */
.button:active {
    transform: scale(0.95);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}