/* 全局样式 */
:root {
    --primary-color: #FF4B39;
    --text-color: #2D3748;
    --bg-color: #F7FAFC;
    --card-bg: #FFFFFF;
    --hover-color: #E53E3E;
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, var(--primary-color), #FF7E6B);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
    margin-bottom: 2rem;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
}

/* 主容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* 文章网格 */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

/* 文章卡片 */
.article-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.article-content {
    padding: 1.5rem;
}

.article-content h2 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.article-content p {
    color: #4A5568;
    margin-bottom: 1.25rem;
    font-size: 1rem;
}

.read-more {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.read-more:hover {
    color: var(--hover-color);
    transform: translateX(4px);
}

/* 页脚 */
footer {
    text-align: center;
    padding: 2rem;
    background-color: var(--card-bg);
    margin-top: 2rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 1rem;
    }
}

/* 代码块样式 */
.code-block {
    background: #1a1a1a;
    border-radius: 8px;
    margin: 1.5rem 0;
    overflow: hidden;
}

.code-header {
    background: #2d2d2d;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #3d3d3d;
}

.code-header span {
    color: #e1e1e1;
    font-size: 0.9rem;
    font-family: 'Fira Code', monospace;
}

pre {
    margin: 0;
    padding: 1rem;
    overflow-x: auto;
}

code {
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* 返回按钮样式 */
.return-button {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.return-button:hover {
    background-color: var(--hover-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

/* 文章页面样式 */
.article-container {
    max-width: 900px;
    margin: 2rem auto;
    padding: 3rem;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.article-container h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--text-color);
    text-align: center;
}

.article-container h2 {
    font-size: 1.8rem;
    margin: 2.5rem 0 1rem;
    color: var(--text-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.article-container p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.8;
    color: #4A5568;
}

.article-container ul, 
.article-container ol {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.article-container li {
    margin-bottom: 0.75rem;
    line-height: 1.6;
    color: #4A5568;
}

/* 文章页面的代码块 */
.article-container .code-block {
    margin: 2rem 0;
}

/* 移除多余的页眉 */
.article-container .header-content {
    display: none;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .article-container {
        padding: 2rem;
        margin: 1rem;
    }

    .article-container h1 {
        font-size: 2rem;
    }

    .article-container h2 {
        font-size: 1.5rem;
    }
}

/* 返回主页按钮 */
.back-to-home {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--primary-color);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 2rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    z-index: 100;
    cursor: pointer;
}

.back-to-home:hover {
    background-color: var(--primary-color-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.back-to-home::before {
    content: "←";
    font-size: 1.2em;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .article-container {
        padding: 1.5rem;
        margin: 0 1rem;
    }

    .article-container h1 {
        font-size: 2rem;
    }

    .article-container h2 {
        font-size: 1.5rem;
    }
}