/* 全局重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 颜色系统 */
    --color-bg: #F5F0E8;
    --color-text: #1a1a1a;
    --color-text-secondary: #6b7280;
    --color-accent: #f97316;
    --color-dark: #1f2937;
    --color-dark-text: #ffffff;
    --color-border: #e5e7eb;
    
    /* 标签颜色 */
    --color-tag-nuxt: #00dc82;
    --color-tag-go: #00add8;
    --color-tag-redis: #dc382d;
    --color-tag-docker: #2496ed;
    --color-tag-vue: #42b883;
    --color-tag-gpt: #10a37f;
    --color-tag-ai: #8b5cf6;
    
    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", Consolas, monospace;
    
    /* 间距 */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* 容器宽度 */
    --container-max: 800px;
    --container-wide: 1000px;
}

html {
    font-size: 16px;
    line-height: 1.6;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部导航 */
.header {
    background-color: transparent;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
    background-color: rgba(245, 240, 232, 0.9);
}

.header-content {
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: var(--space-sm) var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.logo a:hover {
    color: var(--color-accent);
}

.logo-subtitle {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    font-weight: 400;
    letter-spacing: 0.02em;
    margin-top: 0.15rem;
}

.nav {
    display: flex;
    gap: var(--space-md);
}

.nav a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.nav a:hover {
    color: var(--color-text);
}

/* 主内容区域 */
.main {
    flex: 1;
    padding: var(--space-xl) var(--space-md);
}

.container {
    max-width: var(--container-wide);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--space-xl);
    align-items: start;
}

/* 精选文章区域 */
.featured {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.featured-card {
    background-color: var(--color-dark);
    color: var(--color-dark-text);
    padding: var(--space-lg);
    border-radius: 12px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.featured-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.featured-label {
    display: inline-block;
    background-color: var(--color-accent);
    color: white;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    margin-bottom: var(--space-sm);
}

.featured-title {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--space-sm);
}

.featured-excerpt {
    font-size: 0.9rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--space-md);
}

.featured-link {
    color: var(--color-accent);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.featured-link:hover {
    color: white;
}

/* 主内容区和侧边栏布局 */
.main-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

/* 侧边栏 */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    position: sticky;
    top: 80px;
}

.sidebar-widget {
    background-color: white;
    border-radius: 12px;
    padding: var(--space-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.widget-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.about-content p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.stats-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-xs) 0;
}

.stat-number {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-accent);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* 文章列表区域 */
.articles {
    background-color: white;
    border-radius: 12px;
    padding: var(--space-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.article-item {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border);
    transition: background-color 0.2s ease;
}

.article-item:last-child {
    border-bottom: none;
}

.article-item:hover {
    background-color: rgba(0, 0, 0, 0.02);
    margin: 0 calc(-1 * var(--space-md));
    padding-left: var(--space-md);
    padding-right: var(--space-md);
    border-radius: 8px;
}

.article-tag {
    flex-shrink: 0;
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    background-color: #f3f4f6;
    color: var(--color-text-secondary);
    min-width: 50px;
    text-align: center;
    height: fit-content;
    margin-top: 0.25rem;
}

/* 标签颜色 */
.tag-nuxt {
    background-color: rgba(0, 220, 130, 0.1);
    color: var(--color-tag-nuxt);
}

.tag-go {
    background-color: rgba(0, 173, 216, 0.1);
    color: var(--color-tag-go);
}

.tag-redis {
    background-color: rgba(220, 56, 45, 0.1);
    color: var(--color-tag-redis);
}

.tag-docker {
    background-color: rgba(36, 150, 237, 0.1);
    color: var(--color-tag-docker);
}

.tag-vue {
    background-color: rgba(66, 184, 131, 0.1);
    color: var(--color-tag-vue);
}

.tag-gpt {
    background-color: rgba(16, 163, 127, 0.1);
    color: var(--color-tag-gpt);
}

.tag-ai {
    background-color: rgba(139, 92, 246, 0.1);
    color: var(--color-tag-ai);
}

.article-content {
    flex: 1;
    min-width: 0;
}

.article-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.4;
    margin-bottom: 0.5rem;
    transition: color 0.2s ease;
}

.article-item:hover .article-title {
    color: var(--color-accent);
}

.article-excerpt {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-date {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

/* 加载更多 */
.load-more {
    text-align: center;
    margin-top: var(--space-xl);
}

.load-more-btn {
    background-color: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    padding: var(--space-sm) var(--space-lg);
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.load-more-btn:hover {
    background-color: white;
    color: var(--color-text);
    border-color: var(--color-text-secondary);
}

/* 底部 */
.footer {
    margin-top: auto;
    border-top: 1px solid var(--color-border);
    background-color: rgba(0, 0, 0, 0.02);
}

.footer-content {
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: var(--space-lg) var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.footer-links {
    display: flex;
    gap: var(--space-md);
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--color-text);
}

/* 响应式设计 */
@media (max-width: 900px) {
    .container {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        order: 1;
    }
    
    .sidebar {
        order: 0;
        position: static;
        flex-direction: row;
        gap: var(--space-md);
    }
    
    .sidebar-widget {
        flex: 1;
    }
    
    .featured {
        order: -1;
    }
    
    .featured-card {
        padding: var(--space-md);
    }
    
    .articles {
        padding: var(--space-md);
    }
}

@media (max-width: 600px) {
    .header-content {
        padding: var(--space-sm);
    }
    
    .logo a {
        font-size: 1.1rem;
    }
    
    .logo-subtitle {
        font-size: 0.7rem;
    }
    
    .nav {
        gap: var(--space-sm);
    }
    
    .nav a {
        font-size: 0.85rem;
    }
    
    .main {
        padding: var(--space-md) var(--space-sm);
    }
    
    .featured-card {
        padding: var(--space-sm);
    }
    
    .featured-title {
        font-size: 1.1rem;
    }
    
    .article-item {
        flex-direction: column;
        gap: var(--space-xs);
    }
    
    .article-tag {
        align-self: flex-start;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
}

/* 动画和过渡 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.article-item {
    animation: fadeIn 0.3s ease forwards;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background-color: rgba(0, 0, 0, 0.2);
}

/* 打印样式 */
@media print {
    .header,
    .featured,
    .load-more,
    .footer {
        display: none;
    }
    
    .container {
        grid-template-columns: 1fr;
    }
    
    .articles {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}