/* 全局样式设置 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif; /* 使用现代无衬线字体 */
    font-size: 16px; /* 正文字号 */
    line-height: 1.6;
    background: linear-gradient(135deg, #0d47a1, #7b1fa2, #c0c0c0); /* 渐变背景 */
    color: #ffffff;
    overflow-x: hidden; /* 避免水平滚动 */
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.8);
    padding: 20px 50px; /* 优化导航栏内边距 */
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.navbar a {
    color: #00e5ff;
    text-decoration: none;
    margin: 0 15px;
    transition: color 0.3s;
}

.navbar a:hover {
    color: #00c853;
}

/* 主内容区样式 */
.container {
    padding: 100px 50px 50px 50px; /* 顶部留出导航栏空间 */
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.article-content {
    grid-column: 1 / 2;
}

.article-content h2, .article-content h3, .article-content h4 {
    color: #00e5ff;
    margin-top: 20px;
}

.article-content p {
    margin: 15px 0;
}

.article-content pre {
    background: #1a1a1a;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
}

.article-content code {
    color: #00e5ff;
    background: #2c2c2c;
    padding: 2px 4px;
    border-radius: 3px;
}

/* 图片样式 */
.decorative-image {
    width: 100%;
    max-width: 650px;
    border-radius: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s, box-shadow 0.3s;
}

.decorative-image:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.7);
}

/* 提示信息样式 */
.reference-note {
    text-align: center;
    font-size: 18px;
    color: #ffeb3b;
    margin: 30px 0;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 15px 20px;
    }
    
    .article-content {
        padding: 0 10px;
    }
}

@media (max-width: 500px) {
    .article-content {
        padding: 0 5px;
    }
    
    .reference-note {
        font-size: 16px;
    }
}

/* 导航栏优化 */
.navbar ul {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

.navbar li {
    margin: 0 10px;
}

.navbar a {
    padding: 8px 12px;
    border-radius: 4px;
}

.navbar a:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* 代码示例样式 */
.code-example {
    background: #2c2c2c;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 20px 0;
}

.code-example code {
    color: #00e5ff;
    font-family: 'Courier New', Courier, monospace;
}

/* 按钮样式 */
.button {
    display: inline-block;
    padding: 15px 30px;
    background: #00e5ff;
    color: #fff;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s, transform 0.3s;
    text-decoration: none;
}

.button:hover {
    background: #00c853;
    transform: scale(1.05);
}

/* 折叠区域样式 */
.collapsible {
    background-color: #1a1a1a;
    color: #00e5ff;
    cursor: pointer;
    padding: 10px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 18px;
    transition: background 0.3s;
    border-radius: 5px;
}

.active, .collapsible:hover {
    background-color: #00c853;
}

.content {
    padding: 0 15px;
    display: none;
    overflow: hidden;
    background-color: #2c2c2c;
    border-radius: 5px;
    margin-bottom: 10px;
}