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

/* 设置整个页面的背景渐变和字体 */
body {
    background: linear-gradient(135deg, #2C3E50 0%, #7F8C8D 100%);
    color: #ecf0f1;
    font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    padding: 20px;
}

/* 导航栏样式 */
nav {
    background: rgba(44, 62, 80, 0.9);
    padding: 15px 30px;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* 网站标题样式 */
nav .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #ecf0f1;
    text-decoration: none;
}

/* 导航链接样式 */
nav .nav-links a {
    color: #ecf0f1;
    text-decoration: none;
    margin-left: 20px;
    font-size: 1rem;
    transition: color 0.3s;
}

nav .nav-links a:hover {
    color: #E67E22;
}

/* 响应式导航菜单 */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        align-items: flex-start;
    }
    nav .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
    }
    nav .nav-links a {
        margin: 10px 0;
    }
    nav .hamburger {
        display: block;
        cursor: pointer;
        font-size: 1.5rem;
        color: #ecf0f1;
    }
}

/* 头部样式 */
header {
    margin-top: 80px;
    text-align: center;
    padding: 60px 20px;
    background: rgba(44, 62, 80, 0.8);
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

/* 头部标题样式 */
header h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: #E67E22;
}

/* 头部描述样式 */
header p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
}

/* 主要内容区样式 */
main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

/* 文章区块样式 */
article {
    background: rgba(44, 62, 80, 0.9);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    min-width: 500px;
}

/* 文章标题样式 */
article h2 {
    font-size: 1.8rem;
    color: #E67E22;
    margin-bottom: 15px;
}

/* 文章副标题样式 */
article h3 {
    font-size: 1.5rem;
    color: #ecf0f1;
    margin-top: 20px;
    margin-bottom: 10px;
}

/* 文章段落样式 */
article p {
    font-size: 1rem;
    margin-bottom: 15px;
    text-align: justify;
}

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

.article-image:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 12px rgba(0,0,0,0.4);
}

/* 代码块样式 */
pre {
    background: #2C3E50;
    padding: 15px;
    border-radius: 5px;
    overflow: auto;
    margin-bottom: 20px;
}

pre code {
    color: #ecf0f1;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    position: relative;
}

/* 代码块标题 */
pre code::before {
    content: "CSS3 示例代码";
    display: block;
    background: #E67E22;
    color: #fff;
    padding: 5px 10px;
    border-top-left-radius: 5px;
    border-top-right-radius: 5px;
    font-weight: bold;
    font-size: 0.9rem;
}

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

article {
    animation: fadeIn 1s ease-in-out;
}

/* 侧边栏样式 */
.sidebar {
    background: rgba(44, 62, 80, 0.9);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    min-width: 500px;
}

/* 侧边栏标题 */
.sidebar h2 {
    color: #E67E22;
    margin-bottom: 15px;
}

/* 侧边栏链接 */
.sidebar ul {
    list-style: none;
}

.sidebar ul li {
    margin-bottom: 10px;
}

.sidebar ul li a {
    color: #ecf0f1;
    text-decoration: none;
    transition: color 0.3s;
}

.sidebar ul li a:hover {
    color: #E67E22;
}

/* 响应式布局调整 */
@media (max-width: 1200px) {
    main {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    nav .nav-links {
        display: none;
    }
    nav .hamburger {
        display: block;
    }
    header h1 {
        font-size: 2rem;
    }
    article, .sidebar {
        min-width: 100%;
    }
}