/* 全局样式设置 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333333;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%); /* 主色调渐变背景 */
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 容器设置，确保内容适应不同屏幕 */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 80px auto 40px auto;
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 20px;
}

/* 侧边导航栏样式 */
.sidebar {
    background-color: rgba(255, 255, 255, 0.1);
    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: 10px 0;
    transition: color 0.3s;
}
.sidebar a:hover {
    color: #FFD700;
}

/* 主内容区样式 */
.main-content {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* 文章标题样式 */
.main-content h2, .main-content h3 {
    color: #FFD700;
    margin-bottom: 15px;
}

/* 段落样式 */
.main-content p {
    margin-bottom: 15px;
}

/* 代码块样式 */
.main-content pre {
    background-color: #2a5298;
    color: #ffffff;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    margin-bottom: 15px;
}
.main-content code {
    background-color: #1e3c72;
    color: #ffffff;
    padding: 2px 4px;
    border-radius: 4px;
}

/* 图片样式 */
.main-content img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
}
.main-content img:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

/* 提示信息样式 */
.alert {
    background-color: rgba(255, 215, 0, 0.8);
    color: #1e3c72;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    font-size: 1.2em;
    margin-bottom: 20px;
}

/* 折叠内容样式 */
.collapsible {
    background-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    cursor: pointer;
    padding: 10px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 16px;
    border-radius: 8px;
    margin-bottom: 10px;
}

.active, .collapsible:hover {
    background-color: rgba(255, 215, 0, 0.8);
    color: #1e3c72;
}

.content {
    padding: 0 15px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    margin-bottom: 10px;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(30, 60, 114, 0.9);
    color: #ffffff;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.navbar .logo {
    font-size: 1.5em;
    font-weight: bold;
}

.navbar ul {
    list-style: none;
    display: flex;
    gap: 15px;
}

.navbar ul li a {
    color: #ffffff;
    text-decoration: none;
    padding: 5px 10px;
    transition: background-color 0.3s, color 0.3s;
}
.navbar ul li a:hover {
    background-color: #FFD700;
    color: #1e3c72;
    border-radius: 4px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    .navbar ul {
        flex-direction: column;
        background-color: rgba(30, 60, 114, 0.95);
        position: absolute;
        top: 60px;
        right: 0;
        width: 200px;
        display: none;
        padding: 10px;
        border-radius: 8px 0 0 8px;
    }
    .navbar ul.active {
        display: flex;
    }
    .navbar .menu-toggle {
        display: block;
        cursor: pointer;
    }
}

@media (max-width: 500px) {
    .main-content {
        padding: 15px;
    }
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* 按钮样式 */
.button {
    background-color: #FFA500;
    color: #ffffff;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s, box-shadow 0.3s;
    font-size: 16px;
}

.button:hover {
    background-color: #ff8c00;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

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

.fade-in {
    animation: fadeIn 2s ease-in;
}

/* 强调文字 */
.highlight {
    color: #FFD700;
    font-weight: bold;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}