/* 全局样式设置 */
body {
    margin: 0;
    font-family: 'Open Sans', sans-serif;
    background: linear-gradient(135deg, #F0F4F8, #E0E0E0); /* 渐变背景 */
    color: #333333;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(13, 71, 161, 0.9); /* 深蓝色半透明 */
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar .logo {
    color: #FFFFFF;
    font-size: 1.5em;
    font-family: 'Roboto', sans-serif;
}

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

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

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

.navbar ul li a:hover {
    color: #FF9800; /* 橙色高亮 */
}

/* 主内容区域样式 */
.container {
    max-width: 1200px;
    margin: 100px auto 50px;
    padding: 20px;
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 40px;
}

/* 侧边导航栏 */
.sidebar {
    position: sticky;
    top: 100px;
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

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

.sidebar ul li {
    margin-bottom: 15px;
}

.sidebar ul li a {
    text-decoration: none;
    color: #0D47A1;
    font-size: 1em;
    transition: color 0.3s;
    rel="nofollow";
}

.sidebar ul li a:hover {
    color: #FF9800; /* 橙色 */
}

/* 文章内容样式 */
.article-content {
    background-color: #FFFFFF;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.article-content h2, 
.article-content h3 {
    color: #0D47A1;
    font-family: 'Roboto', sans-serif;
}

.article-content p {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 20px;
}

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

.article-content code {
    font-family: 'Courier New', monospace;
    color: #D32F2F;
}

.article-content pre code {
    display: block;
    white-space: pre-wrap;
}

/* 图片样式 */
.article-content img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.article-content img:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 20px rgba(0,0,0,0.2);
}

/* 突出提示样式 */
.prompt {
    background: linear-gradient(135deg, #1976D2, #42A5F5);
    color: #FFFFFF;
    padding: 20px;
    text-align: center;
    font-size: 1.2em;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 40px;
}

/* 代码块样式 */
.code-sample {
    background-color: #263238;
    color: #ECEFF1;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 14px;
}

.code-sample:hover {
    background-color: #37474F;
}

/* 折叠区域样式 */
.collapsible {
    background-color: #EEEEEE;
    color: #0D47A1;
    cursor: pointer;
    padding: 15px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 1em;
    border-radius: 5px;
    transition: background-color 0.3s;
}

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

.content {
    padding: 0 15px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background-color: #F5F5F5;
    border-radius: 0 0 5px 5px;
}

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

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s forwards;
}

/* 按钮样式 */
.button {
    background-color: #1976D2;
    color: #FFFFFF;
    padding: 10px 20px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

.button:hover {
    background-color: #0D47A1;
    transform: scale(1.05);
}

/* 侧边栏卡片 */
.card {
    background: #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;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.2);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    
    .navbar ul {
        flex-direction: column;
        background-color: rgba(13, 71, 161, 0.95);
        position: absolute;
        top: 60px;
        right: 0;
        width: 200px;
        display: none;
    }
    
    .navbar ul li {
        margin: 15px 0;
    }
    
    .navbar ul.show {
        display: flex;
    }
}