/* ===== 智能SEO站群 - 大横幅布局模板样式（占位符由系统按AI风格参数替换） ===== */
:root{
  --primary: #1A1A2E;
  --accent: #7C4DFF;
  --accent-dark: #7C4DFF;
  --bg: #F7F7FB;
  --card-bg: #FFFFFF;
  --text: #1C1C28;
  --text-light: #6B6B80;
  --radius: 12px;
  --font-size: 15px;
  --header-text: #FFFFFF;
  --footer-bg: #12121F;
  --font-family: -apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:var(--font-family);font-size:var(--font-size);color:var(--text);background:var(--bg);line-height:1.7}
img{max-width:100%;height:auto;border:0}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent-dark)}
ul{list-style:none}
.site-wrapper{min-height:100vh;display:flex;flex-direction:column}
.container{max-width:1200px;margin:0 auto;padding:0 15px;width:100%}
.main-content{flex:1;padding:0 0 10px;min-height:60vh}

/* ===== 顶栏 ===== */
.top-bar{background:var(--primary);color:var(--header-text);font-size:13px;line-height:38px}
.top-bar-inner{display:flex;justify-content:space-between;align-items:center}
.top-bar-left{display:flex;gap:8px;align-items:center}
.top-bar-left a{color:var(--header-text);opacity:.85}
.top-bar-left a:hover{opacity:1;color:var(--accent)}
.top-bar-tag{background:var(--accent);color:var(--primary);padding:1px 8px;border-radius:4px;font-size:12px;font-weight:600}
.top-bar-right{display:flex;gap:6px 14px;flex-wrap:wrap;justify-content:flex-end;align-items:center}
.top-bar-right a{color:var(--header-text);opacity:.85}
.top-bar-right a:hover{opacity:1;color:var(--accent)}
.topbar-more{position:relative;color:var(--header-text);opacity:.9;cursor:pointer;white-space:nowrap}
.topbar-more-box{display:none;position:absolute;top:100%;right:0;background:var(--card-bg);border:1px solid rgba(255,255,255,.14);border-radius:10px;min-width:230px;padding:8px 10px;box-shadow:0 14px 34px rgba(0,0,0,.35);z-index:120;line-height:1.6}
.topbar-more-box a{display:block;color:var(--text);padding:5px 10px;border-radius:6px;white-space:nowrap}
.topbar-more-box a:hover{background:var(--accent);color:var(--primary);opacity:1}
.topbar-more:hover .topbar-more-box,.topbar-more:focus-within .topbar-more-box{display:block}

/* ===== 页头 ===== */
.site-header{background:var(--primary);padding:16px 0;box-shadow:0 2px 12px rgba(0,0,0,.18);position:relative;z-index:10}
.header-inner{display:flex;align-items:center;gap:26px;flex-wrap:wrap}
.logo-area{display:flex;align-items:center;gap:10px}
.logo-mark{width:38px;height:38px;background:var(--accent);border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--primary);font-weight:800;flex-shrink:0}
.logo-text{font-size:22px;font-weight:800;color:var(--header-text);line-height:1.2}
.logo-slogan{font-size:12px;color:var(--header-text);opacity:.65}
.main-nav{display:flex;gap:4px;flex:1;justify-content:center;flex-wrap:wrap}
.nav-link{color:var(--header-text);padding:8px 16px;border-radius:6px;font-size:15px;opacity:.92}
.nav-link:hover{background:var(--accent);color:var(--primary);opacity:1}
.nav-link.active{background:var(--accent);color:var(--primary);font-weight:600}
.nav-more{position:relative}
.nav-more-btn{cursor:pointer;user-select:none}
.nav-dropdown{display:none;position:absolute;top:calc(100% + 6px);left:0;background:var(--card-bg);border:1px solid rgba(255,255,255,.14);border-radius:12px;min-width:300px;padding:10px;box-shadow:0 16px 40px rgba(0,0,0,.38);z-index:120;grid-template-columns:1fr 1fr;gap:2px 10px}
.nav-dropdown-item{display:block;color:var(--text-light);padding:7px 12px;border-radius:7px;font-size:14px;white-space:nowrap}
.nav-dropdown-item:hover{background:var(--accent);color:var(--primary);opacity:1}
.nav-more:hover .nav-dropdown,.nav-more:focus-within .nav-dropdown{display:grid}
.header-search{display:flex;align-items:center}
.search-form{display:flex}
.search-input{width:190px;padding:8px 14px;border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.1);color:var(--header-text);border-radius:6px 0 0 6px;font-size:14px;outline:none}
.search-input::placeholder{color:var(--header-text);opacity:.6}
.search-input:focus{border-color:var(--accent)}
.btn{display:inline-block;padding:9px 18px;background:var(--accent);color:var(--primary);border:none;border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;transition:background .2s}
.btn:hover{background:var(--accent-dark);color:var(--primary)}
.search-btn{border-radius:0 6px 6px 0}
.header-ad{text-align:center;overflow:hidden}

/* ===== 大横幅 ===== */
.bn-hero{background:linear-gradient(135deg,#1A1A2E 0%,#7C4DFF 100%);color:#fff;margin-bottom:26px}
.bn-hero-inner{display:flex;gap:40px;align-items:center;padding:56px 15px;flex-wrap:wrap}
.bn-hero-text{flex:1.3;min-width:300px}
.bn-hero-title{font-size:38px;line-height:1.25;font-weight:800;margin-bottom:14px;text-shadow:0 2px 14px rgba(0,0,0,.2)}
.bn-hero-desc{font-size:16.5px;opacity:.9;margin-bottom:22px;max-width:600px}
.bn-hero-stats{display:flex;gap:36px;flex-wrap:wrap}
.bn-hero-stats b{font-size:28px;color:var(--accent);display:block;line-height:1.2}
.bn-hero-stats span{font-size:13px;opacity:.8}
.bn-hero-cover{flex:1;min-width:260px;display:flex;justify-content:center}
.bn-cover-box{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);border-radius:18px;padding:34px 30px;text-align:center;max-width:320px;width:100%;backdrop-filter:blur(4px)}
.bn-cover-box span{font-size:54px;display:block;margin-bottom:10px}
.bn-cover-box p{font-size:14px;opacity:.9;line-height:1.8}

/* ===== 内容区块 ===== */
.bn-block{background:var(--card-bg);border-radius:var(--radius);padding:22px 20px;margin-bottom:20px;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.bn-block-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;border-bottom:2px solid #f0f1f3;padding-bottom:12px}
.bn-block-title{font-size:21px;font-weight:700;color:var(--primary);padding-left:12px;border-left:4px solid var(--accent);line-height:1.3}
.bn-block-more{font-size:13px;color:var(--text-light)}
.bn-block-more:hover{color:var(--accent-dark)}

/* ===== 栏目大卡片 ===== */
.bn-cols{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.bn-col{display:flex;flex-direction:column;gap:8px;background:linear-gradient(160deg,var(--card-bg) 0%,var(--bg) 100%);border:1px solid #eef0f2;border-radius:var(--radius);padding:18px 16px;transition:transform .22s,box-shadow .22s,border-color .22s}
.bn-col:hover{transform:translateY(-4px);box-shadow:0 10px 24px rgba(0,0,0,.1);border-color:var(--accent)}
.bn-col-top{display:flex;align-items:center;justify-content:space-between}
.bn-col-icon{font-size:30px;line-height:1}
.bn-col-count{font-size:12px;color:var(--text-light);background:#f2f3f5;border-radius:20px;padding:2px 10px}
.bn-col-name{font-size:16px;font-weight:700;color:var(--text)}
.bn-col-enter{font-size:12.5px;color:var(--accent-dark);opacity:.85}

/* ===== 资讯两列 ===== */
.bn-news-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.bn-news{display:flex;gap:14px;background:#fff;border:1px solid #eef0f2;border-radius:var(--radius);padding:12px;transition:box-shadow .2s,border-color .2s}
.bn-news:hover{box-shadow:0 4px 14px rgba(0,0,0,.08);border-color:var(--accent)}
.bn-news-thumb{width:118px;height:76px;object-fit:cover;border-radius:8px;flex-shrink:0;background:#f0f1f3}
.bn-news-body{flex:1;min-width:0;display:flex;flex-direction:column;justify-content:center}
.bn-news-title{font-size:16px;font-weight:600;line-height:1.45;margin-bottom:6px}
.bn-news-title a{color:var(--text)}
.bn-news-title a:hover{color:var(--accent-dark)}
.bn-news-meta{font-size:12.5px;color:var(--text-light);display:flex;gap:16px;flex-wrap:wrap}

/* ===== 热门排行 ===== */
.bn-hot{display:flex;flex-direction:column;gap:2px}
.bn-hot li{display:flex;align-items:center;gap:12px;padding:9px 8px;border-radius:6px;font-size:14px}
.bn-hot li:hover{background:#f7f8fa}
.bn-hot-rank{width:24px;height:24px;border-radius:7px;background:#eef0f2;color:var(--text-light);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.bn-hot li:nth-child(1) .bn-hot-rank{background:var(--accent);color:var(--primary)}
.bn-hot li:nth-child(2) .bn-hot-rank{background:var(--accent);color:var(--primary);opacity:.85}
.bn-hot li:nth-child(3) .bn-hot-rank{background:var(--accent);color:var(--primary);opacity:.7}
.bn-hot a{color:var(--text);flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bn-hot a:hover{color:var(--accent-dark)}
.bn-hot-views{font-size:12px;color:var(--text-light);white-space:nowrap}

/* ===== 面包屑 ===== */
.crumb{font-size:13px;color:var(--text-light);padding:13px 16px;background:#fff;border-radius:var(--radius);margin:20px 0 16px;box-shadow:0 1px 4px rgba(0,0,0,.05)}
.crumb a{color:var(--text-light)}
.crumb a:hover{color:var(--accent-dark)}

/* ===== 栏目页 ===== */
.bn-col-head{margin-bottom:16px}
.bn-page-title{font-size:26px;font-weight:800;color:var(--primary);margin-bottom:4px}
.bn-page-desc{color:var(--text-light);font-size:14px}
.bn-news-list{display:flex;flex-direction:column;gap:14px}
.bn-news-row{display:flex;gap:16px;background:#fff;border:1px solid #eef0f2;border-radius:var(--radius);padding:14px;transition:box-shadow .2s,border-color .2s}
.bn-news-row:hover{box-shadow:0 4px 14px rgba(0,0,0,.08);border-color:var(--accent)}
.pager{display:flex;gap:8px;justify-content:center;margin:22px 0}
.pager-link{display:inline-block;min-width:36px;padding:7px 13px;border:1px solid #e0e3e7;border-radius:6px;color:var(--primary);background:#fff;text-align:center;font-size:14px}
.pager-link:hover{border-color:var(--accent);color:var(--accent-dark)}
.pager-link.active{background:var(--accent);border-color:var(--accent);color:var(--primary);font-weight:700}

/* ===== 文章页 ===== */
.bn-article{background:var(--card-bg);border-radius:var(--radius);padding:28px 30px;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.bn-article-header{margin-bottom:20px;border-bottom:1px solid #eef0f2;padding-bottom:18px}
.bn-article-header h1{font-size:27px;line-height:1.4;color:var(--text);margin-bottom:12px;font-weight:800}
.bn-article-meta{font-size:13px;color:var(--text-light);display:flex;gap:18px;flex-wrap:wrap}
.bn-article-content{font-size:16.5px;line-height:2.05;color:#333}
.bn-article-content p{margin-bottom:16px}
.bn-article-content img{border-radius:8px;margin:8px 0}
.bn-article-content h2,.bn-article-content h3{margin:22px 0 10px;color:var(--primary)}
.bn-bottom-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}
.bn-related li{padding:7px 0;border-bottom:1px dashed #f0f1f3}
.bn-related a{font-size:14px;color:var(--text);display:block}
.bn-related a:hover{color:var(--accent-dark)}

/* ===== 广告位 ===== */
.ad-block{margin:14px 0;text-align:center;overflow:hidden}
.ad-block img{max-width:100%}

/* ===== 页脚 ===== */
.site-footer{background:var(--footer-bg);color:var(--header-text);margin-top:36px;font-size:14px;flex-shrink:0}
.footer-main{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:30px;padding:36px 0 20px}
.footer-col h4{font-size:15px;margin-bottom:14px;color:var(--accent)}
.footer-col p{opacity:.72;line-height:1.8;font-size:13.5px}
.footer-col ul li{padding:4px 0}
.footer-col ul a{color:var(--header-text);opacity:.78;font-size:13.5px}
.footer-col ul a:hover{color:var(--accent);opacity:1}
.footer-more{margin-top:2px}
.footer-more summary{cursor:pointer;color:var(--accent);font-size:13px;font-weight:600;padding:6px 0 2px;list-style:none;display:inline-flex;align-items:center;gap:4px;user-select:none}
.footer-more summary::-webkit-details-marker{display:none}
.footer-more summary:hover{opacity:.85}
.footer-more[open] summary{color:var(--accent)}
.footer-more[open] ul{padding-top:2px}
.footer-more ul a{opacity:.78}
.friend-links{display:flex;flex-wrap:wrap;gap:10px 18px;justify-content:center;padding:14px 0;border-top:1px solid rgba(255,255,255,.1);margin-top:6px}
.friend-links a{color:var(--header-text);opacity:.72;font-size:13px}
.friend-links a:hover{color:var(--accent);opacity:1}
.footer-line{text-align:center;padding:16px 0 22px;border-top:1px solid rgba(255,255,255,.08);opacity:.6;font-size:13px}

/* ===== 响应式 ===== */
@media (max-width: 992px){
  .bn-news-grid{grid-template-columns:1fr}
  .bn-bottom-grid{grid-template-columns:1fr}
}
@media (max-width: 768px){
  .header-inner{gap:14px}
  .main-nav{order:3;width:100%;justify-content:flex-start;overflow-x:auto;padding-bottom:4px}
  .nav-link{white-space:nowrap}
  .nav-dropdown{position:static;display:grid;box-shadow:none;border:none;background:transparent;padding:2px 0 6px 12px;min-width:0;grid-template-columns:1fr 1fr}
  .nav-dropdown-item{white-space:normal}
  .search-input{width:130px}
  .bn-hero-inner{padding:34px 15px;flex-direction:column}
  .bn-hero-title{font-size:28px}
  .bn-hero-stats{flex-wrap:wrap;gap:22px}
  .bn-cols{grid-template-columns:repeat(2,1fr)}
  .bn-news{flex-direction:row}
  .bn-news-thumb{width:96px;height:64px}
  .bn-article{padding:18px 14px}
  .bn-article-header h1{font-size:22px}
  .bn-article-content{font-size:15.5px}
  .footer-main{grid-template-columns:1fr;gap:20px}
}
@media (max-width: 420px){
  .bn-cols{grid-template-columns:1fr}
}
.post-card{box-shadow:0 2px 10px rgba(26,26,46,.06);transition:transform .2s ease,box-shadow .2s ease}.post-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(124,77,255,.15)}.post-title a{color:#1C1C28}.post-title a:hover{color:#7C4DFF}.tag-badge{background:#7C4DFF14;color:#7C4DFF;border-radius:6px;padding:2px 8px;font-size:12px}img{max-width:100%;height:auto}