/* 全局样式设置 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Open Sans', sans-serif;
    background: linear-gradient(135deg, #2C3E50 70%, #E67E22 25%, #27AE60 5%);
    color: #2C3E50;
}

/* 导航栏样式 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background-color: rgba(44, 62, 80, 0.9);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar .logo {
    font-size: 24px;
    font-weight: bold;
    color: #FFFFFF;
}

.navbar .nav-links {
    display: flex;
    gap: 20px;
}

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

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

/* 搜索框样式 */
.search-box {
    flex-grow: 1;
    margin-left: 20px;
}

.search-box input {
    width: 100%;
    padding: 8px 12px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    transition: box-shadow 0.3s ease;
}

.search-box input:focus {
    box-shadow: 0 0 5px #E67E22;
    outline: none;
}

/* 主要内容区域样式 */
.main-content {
    padding: 40px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

/* 卡片样式 */
.card {
    background-color: #FFFFFF;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    position: relative;
    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);
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-content {
    padding: 20px;
}

.card-content h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #2C3E50;
}

.card-content p {
    font-size: 15px;
    line-height: 1.6;
    color: #555555;
}

/* 分隔线样式 */
.section-divider {
    height: 2px;
    background: linear-gradient(90deg, #2C3E50, #E67E22);
    margin: 40px 0;
    border: none;
}

/* 文章内容样式 */
article {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #FFFFFF;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

article h2 {
    font-size: 24px;
    color: #2C3E50;
    margin-bottom: 20px;
}

article h3 {
    font-size: 20px;
    color: #27AE60;
    margin-top: 20px;
    margin-bottom: 10px;
}

article section {
    font-size: 16px;
    line-height: 1.8;
    color: #333333;
    margin-bottom: 20px;
}

article pre {
    background-color: #F5F5F5;
    padding: 15px;
    border-radius: 6px;
    overflow-x: auto;
    margin-bottom: 20px;
}

article code {
    font-family: 'Courier New', Courier, monospace;
    background-color: #EFEFEF;
    padding: 2px 4px;
    border-radius: 4px;
}

/* 图片装饰样式 */
.decorative-image {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.decorative-image:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

/* 章节导航样式 */
.chapter-navigation {
    position: fixed;
    top: 100px;
    right: 20px;
    background-color: rgba(44, 62, 80, 0.9);
    padding: 15px;
    border-radius: 8px;
}

.chapter-navigation ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

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

.chapter-navigation ul li a {
    color: #FFFFFF;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.chapter-navigation ul li a:hover {
    color: #E67E22;
}

/* 底部样式 */
.footer {
    padding: 40px;
    background-color: rgba(44, 62, 80, 0.9);
    color: #FFFFFF;
    text-align: center;
}

.footer .footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}

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

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