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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    line-height: 1.8;
    color: #333;
    background-color: #f0f7f0;
}

/* 导航栏样式 */
.navbar {
    background: linear-gradient(135deg, #a8e6cf 0%, #88d8b0 100%);
    padding: 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-item {
    color: white;
    text-decoration: none;
    padding: 15px 18px;
    font-size: 14px;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
}

.nav-item:hover {
    background-color: rgba(255,255,255,0.1);
    border-bottom-color: #fff;
}

.nav-item.active {
    background-color: rgba(255,255,255,0.15);
    border-bottom-color: #fff;
    font-weight: bold;
}

/* 主容器 */
.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

/* 首页标题 */
.hero-section {
    text-align: center;
    padding: 60px 20px;
    background: white;
    border-radius: 10px;
    margin-bottom: 40px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
}

.hero-section h1 {
    font-size: 2.5em;
    color: #5cb85c;
    margin-bottom: 15px;
}

.hero-section p {
    font-size: 1.2em;
    color: #666;
}

/* 分类卡片网格 */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.category-card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 25px rgba(0,0,0,0.15);
}

.category-card h2 {
    color: #5cb85c;
    font-size: 1.4em;
    margin-bottom: 15px;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 10px;
}

.category-card ul {
    list-style: none;
    padding-left: 0;
}

.category-card li {
    padding: 8px 0;
    color: #555;
    font-size: 0.95em;
    border-bottom: 1px dashed #eee;
}

.category-card li:last-child {
    border-bottom: none;
}

/* 文章列表页面 */
.page-header {
    background: white;
    padding: 40px;
    border-radius: 10px;
    margin-bottom: 30px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
}

.page-header h1 {
    color: #5cb85c;
    font-size: 2em;
    margin-bottom: 10px;
}

.page-header .breadcrumb {
    color: #999;
    font-size: 0.9em;
}

.page-header .breadcrumb a {
    color: #5cb85c;
    text-decoration: none;
}

.page-header .breadcrumb a:hover {
    text-decoration: underline;
}

.article-list {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
}

.article-list h2 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5em;
}

.article-item {
    padding: 15px;
    margin-bottom: 10px;
    border-left: 4px solid #5cb85c;
    background: #f8faf8;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.article-item:hover {
    background: #e8f5e8;
    transform: translateX(5px);
}

.article-item a {
    color: #333;
    text-decoration: none;
    font-size: 1.05em;
    display: block;
}

.article-item a:hover {
    color: #5cb85c;
}

/* 文章内容页面 */
.article-content {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    line-height: 2;
}

.article-content h1 {
    color: #5cb85c;
    font-size: 2em;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 3px solid #f0f0f0;
}

.article-content h2 {
    color: #76c893;
    font-size: 1.5em;
    margin: 30px 0 15px 0;
}

.article-content h3 {
    color: #555;
    font-size: 1.2em;
    margin: 25px 0 12px 0;
}

.article-content p {
    margin-bottom: 15px;
    text-align: justify;
}

.article-content ul, .article-content ol {
    margin: 15px 0;
    padding-left: 30px;
}

.article-content li {
    margin-bottom: 8px;
}

.article-content .highlight-box {
    background: linear-gradient(135deg, #a8e6cf15 0%, #88d8b015 100%);
    border-left: 4px solid #5cb85c;
    padding: 20px;
    margin: 20px 0;
    border-radius: 5px;
}

.article-content .tip-box {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 15px;
    margin: 20px 0;
    border-radius: 5px;
}

.article-nav {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 2px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
}

.article-nav a {
    color: #5cb85c;
    text-decoration: none;
    padding: 10px 20px;
    border: 2px solid #5cb85c;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.article-nav a:hover {
    background: #5cb85c;
    color: white;
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 30px;
    margin-top: 50px;
    color: #999;
    background: white;
    border-radius: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
    }
    
    .nav-item {
        text-align: center;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    
    .hero-section h1 {
        font-size: 1.8em;
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .article-content {
        padding: 25px;
    }
    
    .page-header {
        padding: 25px;
    }
}