/* ===== 前台样式（美观+响应式） ===== */
:root{
  --brand:#7c5cff;
  --brand-dark:#5f3fe0;
  --brand-soft:#f0ecff;
  --ink:#1f2430;
  --muted:#6b7280;
  --line:#e5e7eb;
  --bg:#f7f8fc;
  --card:#ffffff;
  --radius:14px;
  --shadow:0 2px 12px rgba(28,32,60,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.7}
a{color:var(--brand);text-decoration:none}
img{max-width:100%;height:auto}
.container{max-width:1080px;margin:0 auto;padding:0 18px}

/* 头部 */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.site-header-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.site-logo{font-weight:800;font-size:19px;color:var(--ink);letter-spacing:.5px}
.site-logo::before{content:"";display:inline-block;width:26px;height:26px;margin-right:9px;border-radius:8px;background:linear-gradient(135deg,var(--brand),#a78bfa);vertical-align:-5px}
.site-nav{display:flex;gap:6px;align-items:center}
.site-nav a{padding:8px 14px;border-radius:9px;color:var(--muted);font-weight:500;transition:.2s}
.site-nav a:hover{background:var(--brand-soft);color:var(--brand-dark)}
.site-nav a.active{background:var(--brand);color:#fff}
.nav-toggle{display:none;font-size:22px;border:none;background:none;cursor:pointer;color:var(--ink)}
.site-main{min-height:60vh;padding:26px 0}

/* Hero */
.hero{background:linear-gradient(135deg,var(--brand-dark),#a78bfa 60%,#c4b5fd);color:#fff;border-radius:var(--radius);padding:36px 28px;margin-bottom:26px}
.hero h1{font-size:26px;margin-bottom:8px}
.hero p{opacity:.92;font-size:15px}

/* 栏目卡片栅格 */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px;margin-bottom:30px}
.cat-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:.25s}
.cat-card:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:0 8px 24px rgba(124,92,255,.18)}
.cat-card-title{font-size:17px;font-weight:700;margin-bottom:8px}
.cat-card-desc{font-size:13px;color:var(--muted);min-height:42px}
.cat-card-count{margin-top:12px;font-size:12px;color:var(--brand);font-weight:600}

/* 栏目块 */
.list-block{margin-bottom:30px}
.list-block-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;border-bottom:2px solid var(--line);padding-bottom:8px}
.list-block-head h2{font-size:18px}
.list-block-head a{font-size:13px}
.article-list{display:flex;flex-direction:column;gap:10px}
.article-item{background:var(--card);border:1px solid var(--line);border-radius:11px;padding:14px 16px;display:flex;justify-content:space-between;gap:12px;align-items:center;transition:.2s}
.article-item:hover{border-color:var(--brand);background:var(--brand-soft)}
.article-item-title{font-weight:600;color:var(--ink);font-size:15px}
.article-item-summary{color:var(--muted);font-size:13px;text-align:right;flex-shrink:0}

/* 目录页 */
.page-head{margin-bottom:20px}
.page-head h1{font-size:24px}
.page-desc{color:var(--muted);font-size:14px;margin-top:4px}
.article-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;display:block;margin-bottom:10px;box-shadow:var(--shadow);transition:.2s}
.article-card:hover{border-color:var(--brand);transform:translateY(-2px)}
.article-card-title{font-weight:700;font-size:16px;margin-bottom:4px}
.article-card-summary{color:var(--muted);font-size:14px}
.article-meta{display:flex;gap:16px;font-size:12px;color:var(--muted);margin-top:8px}
.article-cover{border-radius:9px;margin-bottom:10px;max-height:200px;object-fit:cover}

/* 详情页 */
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:16px}
.article-detail{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px 34px;box-shadow:var(--shadow)}
.article-detail h1{font-size:26px;line-height:1.4;margin-bottom:10px}
.article-detail-cover{border-radius:11px;margin:16px 0}
.article-content{margin-top:18px;font-size:15.5px}
.article-content h2{font-size:20px;margin:22px 0 10px;padding-bottom:8px;border-bottom:2px solid var(--brand-soft)}
.article-content h3{font-size:17px;margin:16px 0 8px}
.article-content p{margin:10px 0}
.article-content ul,.article-content ol{margin:10px 0;padding-left:24px}
.article-content li{margin:6px 0}
.article-content blockquote{border-left:4px solid var(--brand);background:var(--brand-soft);padding:12px 16px;margin:12px 0;border-radius:0 9px 9px 0;color:#444}
.article-content table{border-collapse:collapse;width:100%;margin:14px 0;font-size:14px}
.article-content th,.article-content td{border:1px solid var(--line);padding:8px 10px;text-align:left}
.article-content th{background:var(--brand-soft)}
.article-content img{border-radius:9px;margin:10px 0}
.article-content strong,.article-content b{color:var(--ink)}

/* 侧栏目录 */
.side-panel{margin-top:20px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px}
.panel-title{font-weight:700;margin-bottom:10px}
.toc{list-style:none}
.toc li{border-bottom:1px dashed var(--line);padding:8px 0}
.toc li:last-child{border-bottom:none}
.toc a{color:var(--muted)}
.toc li.active a,.toc a:hover{color:var(--brand)}

/* 页脚 */
.site-footer{border-top:1px solid var(--line);background:#fff;padding:22px 0;text-align:center;color:var(--muted);font-size:13px}

.pager{display:flex;gap:6px;justify-content:center;margin:24px 0;flex-wrap:wrap}
.pager a{width:34px;height:34px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--muted);font-size:14px}
.pager a.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.empty{color:var(--muted);padding:30px 0;text-align:center}

/* 响应式：手机 */
@media (max-width:720px){
  .nav-toggle{display:block}
  .site-nav{position:absolute;top:60px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:10px 18px;border-bottom:1px solid var(--line);display:none;box-shadow:0 8px 16px rgba(0,0,0,.05)}
  .site-nav.open{display:flex}
  .site-nav a{padding:12px 8px;text-align:center}
  .hero{padding:26px 20px}
  .hero h1{font-size:22px}
  .cat-grid{grid-template-columns:1fr}
  .article-detail{padding:20px 18px}
  .article-detail h1{font-size:21px}
  .article-item{flex-direction:column;align-items:flex-start;gap:4px}
  .article-item-summary{text-align:left}
}
/* ===== 正文图片：多图并排 + 点击放大 ===== */
.article-content img{max-width:100%;height:auto;border-radius:8px}
.img-row{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:14px 0}
.img-row-many{grid-template-columns:repeat(3,1fr)}
.img-row img{width:100%;height:auto;object-fit:cover;border-radius:8px;cursor:zoom-in;transition:transform .2s}
.img-row img:hover{transform:scale(1.03)}
@media (max-width:560px){.img-row{grid-template-columns:1fr 1fr}.img-row-many{grid-template-columns:repeat(3,1fr)}}

/* 灯箱 */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.92);z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px}
.lightbox[hidden]{display:none}
.lightbox-img{max-width:92vw;max-height:88vh;object-fit:contain;border-radius:6px;box-shadow:0 8px 40px rgba(0,0,0,.5)}
.lightbox-close{position:absolute;top:16px;right:22px;font-size:38px;line-height:1;color:#fff;background:none;border:none;cursor:pointer;opacity:.85}
.lightbox-close:hover{opacity:1}
.lightbox-nav{position:absolute;top:50%;transform:translateY(-50%);font-size:44px;color:#fff;background:rgba(255,255,255,.12);border:none;width:52px;height:70px;border-radius:10px;cursor:pointer;opacity:.8}
.lightbox-nav:hover{background:rgba(255,255,255,.25)}
.lightbox-prev{left:14px}
.lightbox-next{right:14px}
.lightbox-counter{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);color:#fff;font-size:14px;background:rgba(255,255,255,.15);padding:4px 14px;border-radius:20px}
@media (max-width:560px){.lightbox-nav{width:40px;height:56px;font-size:32px}}