/* 全局样式设置 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif; /* 使用无衬线字体 */
    background: linear-gradient(to bottom, #D3EEFF, #FFFFFF); /* 渐变背景 */
    color: #0F4C81; /* 主色调深蓝色 */
    line-height: 1.6;
}

/* 导航栏样式 */
.navbar {
    position: fixed; /* 固定在顶部 */
    top: 0;
    width: 100%;
    background-color: #0F4C81; /* 深蓝色背景 */
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); /* 阴影效果 */
    z-index: 1000;
}

.navbar a {
    color: #FFFFFF;
    text-decoration: none;
    margin: 0 15px;
    transition: color 0.3s;
}

.navbar a:hover {
    color: #FF7E00; /* 橙色高亮 */
}

.navbar .search-box {
    padding: 5px 10px;
    border: none;
    border-radius: 3px;
}

/* 主要内容区域 */
.container {
    max-width: 1200px;
    margin: 100px auto 50px auto; /* 顶部留白避免被导航栏遮挡 */
    padding: 0 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

/* 文章样式 */
article {
    flex: 1 1 100%;
    background-color: #FFFFFF;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

article h2, article h3, article h4 {
    color: #0F4C81;
}

article h2 {
    font-size: 24px;
    margin-bottom: 20px;
}

article h3 {
    font-size: 20px;
    margin-top: 30px;
    margin-bottom: 15px;
}

article h4 {
    font-size: 18px;
    margin-top: 25px;
    margin-bottom: 10px;
}

article p {
    font-size: 16px;
    margin-bottom: 15px;
    color: #333333;
}

.article-code pre {
    background-color: #F5F5F5;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 20px;
    font-family: 'Courier New', Courier, monospace;
}

.article-code code {
    color: #0F4C81;
}

/* 图片样式 */
.article-images {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
}

.article-images img {
    width: 100%;
    max-width: 320px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

/* 代码示例样式 */
.code-snippet {
    background-color: #F0F8FF;
    padding: 20px;
    border-left: 5px solid #FF7E00;
    border-radius: 5px;
    margin-bottom: 20px;
    font-family: 'Courier New', Courier, monospace;
    overflow-x: auto;
}

.code-snippet code {
    color: #0F4C81;
    display: block;
    white-space: pre;
}

/* 交互效果 */
.card {
    background-color: #FFFFFF;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 20px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.2);
}

.card .icon {
    font-size: 40px;
    color: #FF7E00; /* 点缀色橙色 */
}

.card .description {
    margin: 15px 0;
    color: #333333;
}

.card .learn-more {
    background-color: #FF7E00;
    color: #FFFFFF;
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
    text-decoration: none;
}

.card .learn-more:hover {
    background-color: #e67300;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }
    .container {
        margin: 120px auto 50px auto;
    }
    .article-images {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .navbar {
        padding: 10px 15px;
    }
    .navbar a {
        margin: 5px 0;
    }
    .container {
        margin: 140px auto 50px auto;
    }
    .article-images img {
        max-width: 100%;
    }
    
    /* 确保在小屏设备中，文章内容不被挤压 */
    article {
        flex: 1 1 100%;
    }
}