/* 全局样式设置 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Open Sans', sans-serif; /* 设置全站默认字体 */
    background: linear-gradient(135deg, #0F4C81 70%, #D3D3D3 25%, #FFA500 5%); /* 渐变背景，主色70%，辅色25%，点缀色5% */
    color: #333333; /* 正文字体颜色 */
    line-height: 1.6; /* 行高 */
    overflow-x: hidden; /* 防止出现水平滚动条 */
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(15, 76, 129, 0.9); /* 半透明主色背景 */
    padding: 15px 30px; /* 内边距调整 */
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); /* 阴影效果 */
    z-index: 1000; /* 确保导航栏在最上层 */
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 导航链接样式 */
.navbar a {
    color: #FFFFFF;
    text-decoration: none;
    margin: 0 15px;
    font-size: 16px;
    transition: color 0.3s ease;
}

.navbar a:hover {
    color: #FFA500; /* 点缀色悬停效果 */
}

/* 主容器样式 */
.container {
    max-width: 1200px;
    margin: 100px auto 50px; /* 顶部留出导航栏空间 */
    padding: 20px;
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 40px;
}

/* 侧边栏样式 */
.sidebar {
    background-color: #D3D3D3;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.sidebar h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #0F4C81;
}

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar ul li {
    margin-bottom: 10px;
}

.sidebar ul li a {
    color: #333333;
    text-decoration: none;
    transition: color 0.3s ease;
}

.sidebar ul li a:hover {
    color: #FFA500;
}

/* 文章内容样式 */
article {
    background-color: #FFFFFF;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

article h2, article h3, article h4 {
    color: #0F4C81;
    margin-top: 20px;
}

article p {
    font-size: 16px;
    margin-bottom: 15px;
}

article pre {
    background-color: #F5F5F5;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 20px;
}

article code {
    font-family: 'Courier New', Courier, monospace;
    background-color: #E8E8E8;
    padding: 2px 4px;
    border-radius: 4px;
}

/* 图片样式 */
img.decorative {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

img.decorative:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0,0,0,0.3);
}

/* 代码示例样式 */
.code-example {
    background-color: #2D2D2D;
    color: #CCCCCC;
    padding: 20px;
    border-radius: 5px;
    font-family: 'Courier New', Courier, monospace;
    overflow-x: auto;
    margin-bottom: 20px;
}

.code-example code {
    color: #FFFFFF;
}

/* 强调文字样式 */
strong {
    color: #0F4C81;
}

/* 按钮样式 */
.button {
    background-color: #FFA500;
    color: #FFFFFF;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-size: 16px;
}

.button:hover {
    background-color: #FF8C00;
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn 1s ease-in-out;
}

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

    .sidebar {
        margin-bottom: 20px;
    }
}

/* 提示信息样式 */
.prompt-message {
    text-align: center;
    background-color: #FFA500;
    color: #FFFFFF;
    padding: 15px;
    border-radius: 8px;
    font-size: 18px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}