/* ========== 全局变量 ========== */
:root{--bg-color:#f9f9f9;--card-bg:#fff;--text-color:#333;--sub-text-color:#666;--border-color:#eee;--primary-color:#333;--primary-hover:#007bff}
body.dark-mode{--bg-color:#121212;--card-bg:#1e1e1e;--text-color:#e0e0e0;--sub-text-color:#a0a0a0;--border-color:#333;--primary-color:#e0e0e0;--primary-hover:#4da3ff}

/* ========== 基础重置 ========== */
*{margin:0;padding:0;box-sizing:border-box;transition:background-color .3s,color .05s,border-color .3s}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.6;min-height:100vh;display:flex;flex-direction:column}
a{text-decoration:none;color:inherit}
a:hover{color:var(--primary-hover)}

/* ========== 通用组件类 (新增) ========== */
/* 1. 通用卡片容器 */
.card{background:var(--card-bg);border-radius:8px;border:1px solid var(--border-color)}
/* 2. 通用标签/Chip */
.chip{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;background:var(--bg-color);color:var(--primary-hover);border:1px solid var(--border-color);border-radius:4px;font-size:13px;transition:all .3s ease}
.chip:hover{background:var(--primary-hover);color:#fff;border-color:var(--primary-hover)}
/* 3. 通用列表链接悬停效果 */
.link-slide{display:block;transition:all .3s ease}
.link-slide:hover{color:var(--primary-hover);padding-left:10px}
/* 4. 通用区块标题 */
.section-title{font-weight:bold;margin-bottom:15px;padding-bottom:10px;border-bottom:1px solid var(--border-color);color:var(--text-color)}

/* ========== 顶栏 ========== */
.header{position:sticky;top:0;z-index:100;background:var(--card-bg);border-bottom:1px solid var(--border-color);padding:15px 0}
.container{max-width:100%;margin:0 auto;padding:0 15px;width:100%}
.top-bar{display:flex;justify-content:space-between;align-items:center;gap:15px;color:#4da3ff;}
.site-name{font-size:20px;font-weight:bold;white-space:nowrap}
.search-box{display:flex;flex:1;max-width:300px}
.search-box input{flex:1;padding:8px 12px;border:1px solid var(--border-color);border-right:none;border-radius:4px 0 0 4px;outline:none;font-size:14px;background:var(--bg-color);color:var(--text-color)}
.search-box button{padding:8px 15px;background:var(--primary-color);color:var(--bg-color);border:1px solid var(--primary-color);border-radius:0 4px 4px 0;cursor:pointer;font-size:14px}
/* 非首页搜索按钮降级样式 */
.list-page .search-box button,.content-page .search-box button,.tags-page .search-box button{background:#666;color:#fff;border-color:#666}
.search-box button:hover{background:var(--primary-hover);border-color:var(--primary-hover);color:#fff}

/* ========== 主体布局 ========== */
main{flex:1;padding:15px 0}
.main-layout{display:flex;gap:30px;align-items:flex-start}
.main-content{flex:1;min-width:0}
.sidebar{width:300px;flex-shrink:0;position:sticky;top:80px}

/* ========== 广告位 ========== */
.ad-banner{width:100%;border-radius:8px;overflow:hidden;border:1px solid var(--border-color);background:var(--card-bg);margin-bottom:20px}
.ad-banner img{width:100%;height:auto;display:block;object-fit:cover}

/* ========== 面包屑导航 ========== */
.page-breadcrumb{font-size:14px;color:var(--sub-text-color);margin-bottom:15px}
.page-breadcrumb a{color:var(--sub-text-color)}
.page-breadcrumb a:hover{color:var(--primary-hover)}

/* ========== 首页专属：分类区块+文章列表 ========== */
.category-section{padding:30px;margin-bottom:30px}
.category-heading{font-size:18px;border-bottom-color:var(--primary-color)} /* 继承 .section-title */
.article-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:8px 20px}
.article-list li{padding:6px 0;border-bottom:1px solid var(--border-color)}
.article-list li:last-child{border-bottom:none}
.article-list a{font-size:15px;color:var(--text-color);padding:6px 0} /* 继承 .link-slide */

/* ========== 列表页专属：卡片+文章网格 ========== */
.list-card{padding:40px;margin-bottom:30px}
.post-list{list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:0 30px}
.post-item{padding:12px 0;border-bottom:1px solid var(--border-color)}
.post-item:nth-last-child(-n+2){border-bottom:none}
.post-item:last-child{border-bottom:none}
.post-title{font-size:16px;font-weight:normal;line-height:1.6;color:var(--text-color);transition:color .3s ease}
.post-item a:hover .post-title{color:var(--primary-hover)}

/* ========== 详情页专属：文章内容 ========== */
.article-card{padding:40px;margin-bottom:20px}
.article-title{font-size:24px;font-weight:bold;margin-bottom:15px;line-height:1.4}
.article-meta{font-size:14px;color:var(--sub-text-color);margin-bottom:30px;padding-bottom:20px;border-bottom:1px dashed var(--border-color);display:flex;gap:20px}
.article-content{font-size:16px;line-height:1.8}
.article-content p{margin-bottom:20px}
.article-content h2{font-size:18px;margin:30px 0 15px;font-weight:bold}
.copyright{margin-top:40px;padding:15px;background:var(--bg-color);border-left:4px solid var(--primary-color);font-size:13px;color:var(--sub-text-color);border-radius:0 4px 4px 0}
.article-tags{margin-top:20px;display:flex;gap:8px;flex-wrap:wrap}
.article-content img {max-width: 100%;height: auto;display: block;}
.article-content table {
    /* 边框相关 */
    width: 100%;
    border-collapse: collapse;
    margin: 1em 0;

    /* ⭐ 移动端自适应核心 */
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch; /* iOS 惯性滚动 */
}

/* 保持表格内部结构在滚动容器中正常渲染 */
.article-content table thead,
.article-content table tbody,
.article-content table tr {
    display: table;
    width: 100%;
    table-layout: fixed; /* 防止长文本无限撑宽列 */
}

.article-content th,
.article-content td {
    border: 1px solid #ddd;
    padding: 8px 12px;
    text-align: left;
}

.article-content th {
    background-color: #f5f5f5;
    font-weight: 600;
}
/* .article-tags a 已合并至 .chip */

/* ========== 详情页专属：上下页导航 ========== */
.content-page .pagination{display:flex;justify-content:space-between;gap:15px;margin-bottom:30px}
.content-page .pagination a{flex:1;display:block;padding:15px 20px;background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;font-size:14px;color:var(--text-color)}
.content-page .pagination a:hover{border-color:var(--primary-hover);color:var(--primary-hover)}
.content-page .pagination .label{display:block;font-size:12px;color:var(--sub-text-color);margin-bottom:4px}
.content-page .pagination .next{text-align:right}

/* ========== 详情页专属：推荐阅读 ========== */
.recommend-section{padding:30px}
.recommend-title{font-size:18px} /* 继承 .section-title */
.recommend-list{list-style:none}
.recommend-list li{padding:10px 0;border-bottom:1px solid var(--border-color);font-size:15px}
.recommend-list li:last-child{border-bottom:none}
/* .recommend-list a 已合并至 .link-slide */

/* ========== 标签页专属：标签云 ========== */
.tag-cloud-card{padding:40px;margin-bottom:30px}
.page-title{font-size:28px;font-weight:bold;text-align:center;margin-bottom:30px;padding-bottom:20px;border-bottom:1px dashed var(--border-color)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:12px;padding:10px 0}
/* .tag-chip 已合并至 .chip，此处仅写差异 */
.tag-chip{padding:6px 12px;font-size:14px;gap:8px}
.tag-count{font-size:12px;padding:2px 6px;border-radius:10px;background:var(--border-color);color:var(--sub-text-color)}
.chip:hover .tag-count{background:rgba(255,255,255,.3);color:#fff}

/* ========== 列表页/标签页共用：居中式分页 ========== */
.list-page .pagination,.tags-page .pagination{display:flex;justify-content:center;align-items:center;gap:8px;flex-wrap:wrap;margin-top:30px}
.list-page .pagination a,.list-page .pagination span,.tags-page .pagination a,.tags-page .pagination span{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 10px;background:var(--card-bg);border:1px solid var(--border-color);border-radius:4px;font-size:14px;color:var(--sub-text-color)}
.list-page .pagination a:hover,.tags-page .pagination a:hover{border-color:var(--primary-color);color:var(--primary-color)}
.list-page .pagination .active,.tags-page .pagination .active{background:var(--primary-color);color:var(--bg-color);border-color:var(--primary-color)}
.list-page .pagination .dots,.tags-page .pagination .dots{border:none;background:transparent;min-width:auto;padding:0 5px;color:var(--sub-text-color)}

/* ========== 侧边栏通用 ========== */
.sidebar-widget{padding:20px;margin-bottom:20px}
.widget-title{font-size:16px;border-bottom-style:dashed} /* 继承 .section-title */
.widget-category-list{list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.widget-category-list li{padding:0;margin:0}
/* .widget-category-list a 已合并至 .chip */
.category-count{font-size:12px;opacity:.7;margin-left:2px}
.widget-tags,.widget-tag-list{display:flex;flex-wrap:wrap;gap:8px}
/* .widget-tags a, .widget-tag-list a 已合并至 .chip */
.widget-tag-list a{padding:3px 10px;font-size:12px} /* 微调尺寸 */
.widget-dynamics{list-style:none}
.widget-dynamics li{padding:8px 0;border-bottom:1px solid var(--border-color);font-size:14px;color:var(--sub-text-color)}
.widget-dynamics li:last-child{border-bottom:none}
.widget-recommend-list{list-style:none}
.widget-recommend-list li{padding:8px 0;border-bottom:1px solid var(--border-color);font-size:14px}
.widget-recommend-list li:last-child{border-bottom:none}
/* .widget-recommend-list a 已合并至 .link-slide */
.widget-notice{font-size:14px;color:var(--sub-text-color);line-height:1.8}
.widget-notice p{margin-bottom:8px}
.widget-links{list-style:none;display:flex;flex-wrap:wrap;gap:10px}
.widget-links a{font-size:14px;color:var(--sub-text-color);padding:4px 10px;border:1px solid var(--border-color);border-radius:4px}
.widget-links a:hover{border-color:var(--primary-color);color:var(--primary-color)}

/* ========== 悬浮按钮 & 页脚 ========== */
.theme-toggle{position:fixed;bottom:30px;right:30px;width:45px;height:45px;background:rgba(150,150,150,.2);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:18px;z-index:999;color:var(--sub-text-color);backdrop-filter:blur(5px)}
.theme-toggle:hover{background:rgba(150,150,150,.4);color:var(--text-color)}
footer{padding:20px 0;text-align:center;font-size:13px;color:var(--sub-text-color);border-top:1px solid var(--border-color);margin-top:40px}

/* ========== 响应式 ========== */
@media(min-width:768px){.container{max-width:90%}}
@media(min-width:1024px){.container{max-width:1200px}.sidebar{width:300px}.site-name{font-size:26px;}}
@media(max-width:900px){.main-layout{flex-direction:column}.sidebar{width:100%;position:static}.list-card,.article-card,.tag-cloud-card{padding:25px}.category-section{padding:20px}}
@media(max-width:768px){.top-bar{flex-wrap:wrap}.search-box{max-width:100%;width:100%;margin-top:10px}.article-list{grid-template-columns:1fr}}
@media(max-width:600px){.post-list{grid-template-columns:1fr;gap:0}.post-item:nth-last-child(-n+2){border-bottom:1px solid var(--border-color)}.post-item:last-child{border-bottom:none}.content-page .pagination{flex-direction:column}.page-title{font-size:22px}}