/* ============================================================
   GitHub Pages Jekyll 网站样式表
   自定义您的网站外观
============================================================= */

/* ------------------------------------------------------------
   CSS 变量（主题颜色配置）
   修改这些值可以快速改变网站整体配色
------------------------------------------------------------- */
:root {
    --primary-color: #0366d6;        /* 主色调（GitHub 蓝） */
    --secondary-color: #586069;      /* 次要颜色 */
    --background-color: #ffffff;     /* 背景色 */
    --text-color: #24292e;           /* 文字颜色 */
    --link-color: #0366d6;           /* 链接颜色 */
    --border-color: #e1e4e8;         /* 边框颜色 */
    --header-bg: #f6f8fa;            /* 头部背景 */
    --footer-bg: #f6f8fa;            /* 页脚背景 */
    --code-bg: #f6f8fa;              /* 代码块背景 */
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

a {
    color: var(--link-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ------------------------------------------------------------
   容器布局
------------------------------------------------------------- */
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ------------------------------------------------------------
   页面头部
------------------------------------------------------------- */
.site-header {
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.site-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-color);
}

.site-title:hover {
    text-decoration: none;
    color: var(--primary-color);
}

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

.nav-link {
    color: var(--secondary-color);
    font-weight: 500;
}

.nav-link:hover {
    color: var(--primary-color);
    text-decoration: none;
}

/* ------------------------------------------------------------
   主内容区域
------------------------------------------------------------- */
.site-main {
    padding: 40px 0;
    min-height: calc(100vh - 200px);
}

.page-title {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-color);
}

.page-content {
    font-size: 18px;
    line-height: 1.8;
}

/* 内容排版 */
.page-content h1 {
    font-size: 28px;
    margin: 30px 0 15px;
}

.page-content h2 {
    font-size: 24px;
    margin: 25px 0 12px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.page-content h3 {
    font-size: 20px;
    margin: 20px 0 10px;
}

.page-content p {
    margin-bottom: 16px;
}

.page-content ul,
.page-content ol {
    margin: 16px 0;
    padding-left: 30px;
}

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

.page-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding: 10px 20px;
    margin: 20px 0;
    background-color: var(--code-bg);
    color: var(--secondary-color);
}

/* ------------------------------------------------------------
   代码块样式
------------------------------------------------------------- */
.page-content code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 85%;
    background-color: var(--code-bg);
    padding: 2px 6px;
    border-radius: 3px;
}

.page-content pre {
    background-color: var(--code-bg);
    padding: 16px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 20px 0;
}

.page-content pre code {
    background: none;
    padding: 0;
    font-size: 14px;
    line-height: 1.5;
}

/* ------------------------------------------------------------
   表格样式
------------------------------------------------------------- */
.page-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.page-content th,
.page-content td {
    border: 1px solid var(--border-color);
    padding: 10px 15px;
    text-align: left;
}

.page-content th {
    background-color: var(--header-bg);
    font-weight: 600;
}

.page-content tr:nth-child(even) {
    background-color: var(--code-bg);
}

/* ------------------------------------------------------------
   博客文章样式
------------------------------------------------------------- */
.post-item {
    margin-bottom: 30px;
}

.post-item h2 {
    border-bottom: none;
    margin-bottom: 10px;
}

.post-item h2 a {
    color: var(--text-color);
}

.post-item h2 a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.post-meta {
    font-size: 14px;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.post-categories,
.post-tags {
    margin-left: 10px;
}

.post-excerpt {
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.read-more {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 500;
}

/* 文章页面样式 */
.post-header {
    margin-bottom: 30px;
}

.post-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
}

.post-meta {
    font-size: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.post-content {
    font-size: 18px;
    line-height: 1.8;
}

.post-footer {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.post-share {
    margin-bottom: 20px;
}

.post-share p {
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.share-link {
    display: inline-block;
    margin-right: 10px;
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 4px;
    font-size: 14px;
}

.share-link:hover {
    text-decoration: none;
    opacity: 0.9;
}

.post-navigation {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 20px;
}

.nav-previous,
.nav-next {
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    flex: 1;
    text-align: center;
}

.nav-previous:hover,
.nav-next:hover {
    background-color: var(--header-bg);
    text-decoration: none;
}

/* ------------------------------------------------------------
   页脚样式
------------------------------------------------------------- */
.site-footer {
    background-color: var(--footer-bg);
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
    text-align: center;
}

.copyright {
    color: var(--secondary-color);
    font-size: 14px;
    margin-bottom: 15px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.social-link {
    color: var(--secondary-color);
    font-size: 14px;
}

.social-link:hover {
    color: var(--primary-color);
}

/* ------------------------------------------------------------
   响应式设计
------------------------------------------------------------- */
@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .site-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .page-title {
        font-size: 24px;
    }
    
    .post-title {
        font-size: 28px;
    }
    
    .post-navigation {
        flex-direction: column;
    }
}

/* ------------------------------------------------------------
   工具类
------------------------------------------------------------- */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.hidden {
    display: none;
}