/* 
    主体样式定义
    该CSS样式旨在创建一个融合未来感与高级质感的网页，适配不同设备的响应式布局，注重视觉美感与用户体验。以下是主要的样式规则：
*/

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

/* 设置背景色和字体 */
body {
    font-family: 'Roboto Slab', serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333333;
    background: linear-gradient(135deg, #2c3e50 70%, #34495e 25%, #f1c40f 5%);
    padding: 20px;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(44, 62, 80, 0.9);
    padding: 15px 0;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.navbar ul {
    list-style: none;
    display: flex;
    justify-content: center;
}

.navbar li {
    margin: 0 20px;
    position: relative;
}

.navbar a {
    color: #ecf0f1;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

.navbar a:hover {
    color: #f1c40f;
}

/* 下拉菜单样式 */
.navbar ul ul {
    display: none;
    position: absolute;
    top: 40px;
    left: 0;
    background: #34495e;
    padding: 10px 0;
    border-radius: 4px;
}

.navbar ul li:hover > ul {
    display: block;
}

.navbar ul ul li {
    margin: 10px 0;
}

.navbar ul ul a {
    padding: 10px 20px;
    display: block;
}

.navbar ul ul a:hover {
    background: #2c3e50;
    color: #f1c40f;
}

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

/* 文章样式 */
article {
    background: rgba(255, 255, 255, 0.9);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

article h2, article h3 {
    color: #2c3e50;
    margin-bottom: 15px;
}

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

article pre {
    background: #ecf0f1;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 15px;
}

article code {
    font-family: 'Courier New', Courier, monospace;
    color: #e74c3c;
}

article .language-css {
    background: #ecf0f1;
    padding: 10px;
    border-radius: 5px;
}

/* 图片样式 */
.decorative-image {
    max-width: 650px;
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.decorative-image:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* 响应式布局 */
@media (min-width: 768px) {
    .container {
        grid-template-columns: 3fr 1fr;
    }
}

@media (max-width: 480px) {
    .navbar ul {
        flex-direction: column;
    }
    
    .navbar li {
        margin: 10px 0;
    }
    
    .container {
        grid-template-columns: 1fr;
    }
}

/* 强调区样式 */
.highlight {
    background: #f1c40f;
    padding: 10px;
    border-radius: 5px;
    color: #2c3e50;
    font-weight: bold;
}

/* 按钮样式 */
.button {
    background: #2c3e50;
    color: #ecf0f1;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.3s ease;
}

.button:hover {
    background: #34495e;
    transform: translateY(-2px);
}

/* 代码块样式 */
.code-block {
    background: #ecf0f1;
    padding: 20px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 20px;
}

.code-block code {
    color: #e74c3c;
    font-family: 'Courier New', Courier, monospace;
}

/* 提示信息样式 */
.reference-note {
    background: rgba(241, 196, 15, 0.1);
    border-left: 5px solid #f1c40f;
    padding: 10px 20px;
    margin: 20px 0;
    font-size: 18px;
    color: #2c3e50;
}

/* 折叠区域样式 */
.collapsible {
    background-color: #2c3e50;
    color: white;
    cursor: pointer;
    padding: 10px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 16px;
    border-radius: 5px;
    margin-bottom: 10px;
    transition: background 0.3s ease;
}

.collapsible:hover {
    background-color: #34495e;
}

.content {
    padding: 0 15px;
    display: none;
    overflow: hidden;
    background-color: #f1f1f1;
    border-radius: 5px;
}

/* 加载指示器样式 */
.loader {
    width: 50px;
    height: 50px;
    border: 5px solid #f1c40f;
    border-top: 5px solid #2c3e50;
    border-radius: 50%;
    animation: spin 2s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 隐藏水平滚动条 */
body {
    overflow-x: hidden;
}