/* 全局样式设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 根元素的字体和颜色变量定义 */
:root {
    --primary-color: #1A237E; /* 主色调，深蓝色 */
    --secondary-color: #B0BEC5; /* 辅助色，灰色 */
    --accent-color: #FF9800; /* 点缀色，亮橙色 */
    --background-gradient: linear-gradient(135deg, #1A237E 30%, #B0BEC5 90%); /* 背景渐变 */
    --font-primary: 'Helvetica Neue', sans-serif; /* 主字体 */
    --font-secondary: 'Open Sans', sans-serif; /* 辅助字体 */
}

/* 设置页面背景和基本字体 */
body {
    background: var(--background-gradient);
    color: var(--secondary-color);
    font-family: var(--font-secondary);
    line-height: 1.6;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 栏目提示样式 */
.header-note {
    font-size: 18px;
    color: var(--accent-color);
    margin-bottom: 30px;
    text-align: center;
    font-family: var(--font-primary);
}

/* 文章容器样式 */
article {
    max-width: 1200px;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.1);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

/* 文章标题样式 */
article h2, article h3 {
    font-family: var(--font-primary);
    color: #FFFFFF;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

/* 段落样式 */
article p {
    font-size: 16px;
    color: #FFFFFF;
    margin-bottom: 20px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

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

article table, article th, article td {
    border: 1px solid var(--secondary-color);
}

article th, article td {
    padding: 12px;
    text-align: left;
}

article th {
    background-color: rgba(255, 152, 0, 0.7);
    color: #fff;
    font-family: var(--font-primary);
}

article td {
    background-color: rgba(255, 255, 255, 0.2);
}

/* 代码块样式 */
article pre {
    background-color: rgba(0, 0, 0, 0.7);
    padding: 20px;
    border-radius: 8px;
    overflow: auto;
    margin-bottom: 20px;
}

article pre code {
    color: #FFEB3B;
    font-family: 'Courier New', Courier, monospace;
    position: relative;
    padding-left: 60px;
}

article pre code::before {
    content: '代码示例';
    position: absolute;
    left: 20px;
    top: 20px;
    background-color: var(--accent-color);
    color: #fff;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 14px;
}

/* 图片装饰样式 */
.decoration-images {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
    justify-content: center;
}

.decoration-images img {
    width: 160px;
    height: 160px;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    transition: transform 0.3s, box-shadow 0.3s;
}

.decoration-images img:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0,0,0,0.5);
}

/* 导航栏样式 */
.navbar {
    width: 100%;
    background-color: rgba(26, 35, 126, 0.9);
    padding: 15px 30px;
    position: fixed;
    top: 0;
    left: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
}

.navbar a {
    color: #fff;
    margin: 0 10px;
    text-decoration: none;
    font-family: var(--font-primary);
    transition: color 0.3s;
}

.navbar a:hover {
    color: var(--accent-color);
}

/* 响应式布局 */
@media (max-width: 768px) {
    article {
        padding: 20px;
    }

    .decoration-images img {
        width: 120px;
        height: 120px;
    }

    .header-note {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .navbar a {
        margin: 5px 0;
    }

    article h2 {
        font-size: 24px;
    }

    article h3 {
        font-size: 20px;
    }

    article pre code::before {
        content: '代码';
        font-size: 12px;
        padding: 3px 6px;
        left: 10px;
        top: 10px;
    }
}

/* 段落中的链接样式 */
article a {
    color: var(--accent-color);
    text-decoration: underline;
}

article a:hover {
    color: #FFD54F;
}

/* 按钮样式 */
.btn {
    background-color: var(--accent-color);
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

.btn:hover {
    background-color: #F57C00;
    transform: translateY(-3px);
}

/* 折叠区域样式 */
.collapsible {
    background-color: rgba(255, 152, 0, 0.7);
    color: #fff;
    cursor: pointer;
    padding: 10px 20px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 18px;
    border-radius: 4px;
    margin-bottom: 10px;
}

.active, .collapsible:hover {
    background-color: var(--accent-color);
}

.content {
    padding: 0 20px;
    display: none;
    overflow: hidden;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    margin-bottom: 20px;
}

.content p {
    color: #fff;
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* 代码块内代码高亮 */
pre code {
    background-color: rgba(0, 0, 0, 0.8);
    border-left: 4px solid var(--accent-color);
    padding-left: 10px;
}

/* 表单隐藏样式，确保无表单元素 */
form {
    display: none;
}