/* 博客网站样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 头部样式 */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 导航样式 */
nav {
    background: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav-menu {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.nav-menu a:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* 主要内容区域 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 20px;
}

/* 文章列表样式 */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.article-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.article-image {
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.article-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.3));
}

.article-content {
    padding: 1.5rem;
}

.article-title {
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: #333;
}

.article-meta {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    display: flex;
    gap: 1rem;
}

.article-excerpt {
    color: #555;
    margin-bottom: 1rem;
    line-height: 1.7;
}

.read-more {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    padding: 0.7rem 1.5rem;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.read-more:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* 单篇文章页面样式 */
.article-page {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.article-header {
    padding: 2rem;
    border-bottom: 1px solid #eee;
}

.article-header h1 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    color: #333;
}

.article-meta-full {
    color: #666;
    display: flex;
    gap: 2rem;
    margin-bottom: 1rem;
}

.article-body {
    padding: 2rem;
}

.article-body h2 {
    color: #333;
    margin: 2rem 0 1rem 0;
    font-size: 1.5rem;
}

.article-body h3 {
    color: #444;
    margin: 1.5rem 0 0.8rem 0;
    font-size: 1.3rem;
}

.article-body p {
    margin-bottom: 1.2rem;
    line-height: 1.8;
    color: #555;
}

.article-body img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 1.5rem 0;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

.article-body ul, .article-body ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

.article-body li {
    margin-bottom: 0.5rem;
    color: #555;
}

.article-body blockquote {
    border-left: 4px solid #667eea;
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: #666;
    background: #f8f9fa;
    padding: 1rem 1.5rem;
    border-radius: 0 10px 10px 0;
}

.article-body code {
    background: #f1f3f4;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: #d73a49;
}

.article-body pre {
    background: #f8f8f8;
    padding: 1.5rem;
    border-radius: 10px;
    overflow-x: auto;
    margin: 1.5rem 0;
    border-left: 4px solid #667eea;
}

.article-body pre code {
    background: none;
    padding: 0;
    color: #333;
}

/* 图片画廊样式 */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.gallery-item {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.gallery-item:hover {
    transform: scale(1.02);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    margin: 0;
}

/* 页脚样式 */
footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

/* 返回主页链接 */
.back-home {
    display: inline-block;
    background: #667eea;
    color: white;
    text-decoration: none;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    margin: 2rem 0;
    transition: all 0.3s ease;
}

.back-home:hover {
    background: #5a6fd8;
    transform: translateY(-2px);
}

/* 响应式设计 */
/* 平板设备 */
@media (max-width: 1024px) {
    .container {
        padding: 1.5rem 15px;
    }
    
    .articles-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 1.5rem;
    }
    
    .article-body {
        padding: 1.8rem;
    }
    
    .image-gallery {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
}

/* 手机横屏/小平板 */
@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
        padding: 1rem 0;
    }
    
    .nav-menu a {
        padding: 0.7rem 1.2rem;
        display: block;
        text-align: center;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .article-meta, .article-meta-full {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
    
    .logo {
        font-size: 2rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
    
    .container {
        padding: 1rem 15px;
    }
    
    .article-body {
        padding: 1.5rem;
    }
    
    .article-header {
        padding: 1.5rem;
    }
    
    .article-header h1 {
        font-size: 1.8rem;
        line-height: 1.3;
    }
    
    .article-body h2 {
        font-size: 1.3rem;
    }
    
    .article-body h3 {
        font-size: 1.1rem;
    }
    
    .article-body pre {
        padding: 1rem;
        font-size: 0.9rem;
        overflow-x: auto;
    }
    
    .image-gallery {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 0.8rem;
    }
    
    .back-home {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
}

/* 手机竖屏 */
@media (max-width: 480px) {
    .header-content {
        padding: 0 15px;
    }
    
    .logo {
        font-size: 1.8rem;
    }
    
    .tagline {
        font-size: 0.9rem;
    }
    
    .nav-container {
        padding: 0 15px;
    }
    
    .nav-menu a {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
    
    .container {
        padding: 0.8rem 10px;
    }
    
    .article-card {
        margin: 0 5px;
    }
    
    .article-content {
        padding: 1.2rem;
    }
    
    .article-title {
        font-size: 1.1rem;
        line-height: 1.4;
    }
    
    .article-excerpt {
        font-size: 0.9rem;
        line-height: 1.6;
    }
    
    .read-more {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
    
    .article-body {
        padding: 1rem;
    }
    
    .article-header {
        padding: 1rem;
    }
    
    .article-header h1 {
        font-size: 1.5rem;
        line-height: 1.3;
    }
    
    .article-body h2 {
        font-size: 1.2rem;
        margin: 1.5rem 0 0.8rem 0;
    }
    
    .article-body h3 {
        font-size: 1rem;
        margin: 1.2rem 0 0.6rem 0;
    }
    
    .article-body p {
        font-size: 0.95rem;
        line-height: 1.7;
    }
    
    .article-body ul, .article-body ol {
        padding-left: 1.5rem;
    }
    
    .article-body li {
        font-size: 0.95rem;
    }
    
    .article-body blockquote {
        padding: 0.8rem 1rem;
        margin: 1rem 0;
        font-size: 0.9rem;
    }
    
    .article-body pre {
        padding: 0.8rem;
        font-size: 0.8rem;
        margin: 1rem 0;
    }
    
    .article-body code {
        font-size: 0.85rem;
        padding: 0.1rem 0.3rem;
    }
    
    .image-gallery {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .gallery-item img {
        height: 220px;
    }
    
    .back-home {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
        margin: 1rem 0;
    }
    
    footer {
        padding: 1.5rem 0;
        font-size: 0.9rem;
    }
}

/* 超小屏幕 */  
@media (max-width: 320px) {
    .logo {
        font-size: 1.5rem;
    }
    
    .article-header h1 {
        font-size: 1.3rem;
    }
    
    .article-body {
        padding: 0.8rem;
    }
    
    .article-header {
        padding: 0.8rem;
    }
    
    .container {
        padding: 0.5rem 8px;
    }
    
    .nav-menu a {
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }
}