/* 全局样式设置 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: #F5F5F5; /* 背景主色 */
    color: #607D8B; /* 辅色 */
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background-color: #0D47A1; /* 主色 */
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    padding: 0 20px;
    z-index: 1000;
}

.navbar ul {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

.navbar li {
    margin-right: 20px;
}

.navbar a {
    color: #FFFFFF;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

.navbar a:hover {
    color: #FF9800; /* 点缀色 */
}

/* 主容器布局 */
.container {
    display: grid;
    grid-template-columns: 250px 1fr;
    grid-gap: 20px;
    padding: 80px 20px 20px 20px; /* 上方预留导航栏空间 */
}

.sidebar {
    grid-column: 1 / 2;
    background-color: #0D47A1; /* 主色 */
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.sidebar a {
    display: block;
    color: #FFFFFF;
    text-decoration: none;
    margin-bottom: 15px;
    font-size: 16px;
    transition: color 0.3s ease;
}

.sidebar a:hover {
    color: #FF9800; /* 点缀色 */
}

/* 主内容样式 */
.main-content {
    grid-column: 2 / 3;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    grid-gap: 20px;
}

.module {
    background-color: #FFFFFF;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.module:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 12px rgba(0,0,0,0.2);
}

/* 代码块样式 */
pre {
    background-color: #EEEEEE;
    padding: 15px;
    border-radius: 5px;
    overflow: auto;
    position: relative;
}

pre code {
    font-family: 'Courier New', Courier, monospace;
    color: #333333;
    display: block;
}

pre code::before {
    content: "代码块示例";
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
}

/* 图片样式 */
img {
    width: 100%;
    height: auto;
    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:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 12px rgba(0,0,0,0.2);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: relative;
        width: 100%;
        margin-bottom: 20px;
    }

    .main-content {
        grid-template-columns: 1fr;
    }

    .navbar ul {
        flex-direction: column;
    }

    .navbar li {
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* 标题样式 */
h2, h3, h4 {
    color: #0D47A1; /* 主色 */
    margin-bottom: 10px;
}

h2 {
    font-size: 24px;
}

h3 {
    font-size: 20px;
}

h4 {
    font-size: 18px;
}

/* 提示信息样式 */
.alert {
    background-color: #FF9800; /* 点缀色 */
    color: #FFFFFF;
    padding: 10px;
    border-radius: 5px;
    text-align: center;
    margin-bottom: 20px;
    font-size: 18px;
}

/* 折叠区域样式 */
.collapsible {
    background-color: #607D8B; /* 辅色 */
    color: white;
    cursor: pointer;
    padding: 10px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 18px;
    border-radius: 5px;
    margin-top: 10px;
}

.active, .collapsible:hover {
    background-color: #455A64;
}

.content {
    padding: 0 15px;
    display: none;
    overflow: hidden;
    background-color: #f1f1f1;
    border-radius: 5px;
    margin-bottom: 10px;
}

/* 按钮样式 */
button {
    background-color: #0D47A1;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #1565C0;
}