/* ============================================================
   火天使 Articles UI Design System (articles.ds.css)
   ============================================================
   服务于：/articles/list.html 文章首页、文章详情页、latest.html
   与 Tools Design System 共享品牌 Token（primary #4f46e5 等）
   原则：阅读优先、克制、留白、无蓝紫渐变、动画 150-250ms
   ============================================================ */

:root{
  --ds-bg:#FFFFFF;
  --ds-bg-alt:#F7F8FA;
  --ds-text:#1F2329;
  --ds-text-2:#646A73;
  --ds-text-3:#8A9099;
  --ds-border:#E5E7EB;
  --ds-border-soft:#EEF0F2;
  --ds-primary:#4f46e5;
  --ds-primary-hover:#4338ca;
  --ds-primary-soft:#EEF2FF;
  --ds-primary-border:#C7D2FE;
  --ds-success:#065f46;
  --ds-radius:12px;
  --ds-radius-sm:8px;
  --ds-radius-xs:6px;
  --ds-font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --ds-shadow-sm:0 1px 2px rgba(0,0,0,.04);
  --ds-shadow-hover:0 8px 24px rgba(79,70,229,.08);
  --ds-max-w:1280px;
  --ds-read-w:720px;
  --ds-art-w:1140px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--ds-font);
  color:var(--ds-text);
  background:var(--ds-bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--ds-primary);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--ds-primary-hover)}
img{max-width:100%;height:auto}
.container{max-width:var(--ds-max-w);margin:0 auto;padding:0 32px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ============ 站点统一 Header（与 Tools 同品牌） ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  height:64px;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--ds-border-soft);
}
.site-header .container{
  height:64px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.site-brand{font-size:20px;font-weight:800;color:var(--ds-text);letter-spacing:1px;display:flex;align-items:center;gap:8px;flex-shrink:0}
.site-brand .brand-dot{width:10px;height:10px;border-radius:50%;background:var(--ds-primary);display:inline-block}
.site-brand:hover{color:var(--ds-primary)}
.site-nav{display:flex;align-items:center;gap:4px;flex:1;justify-content:center}
.site-nav a{
  color:var(--ds-text-2);font-size:14px;font-weight:500;
  padding:7px 14px;border-radius:8px;transition:all .18s ease;
}
.site-nav a:hover{color:var(--ds-primary);background:var(--ds-primary-soft)}
.site-nav a.active{color:var(--ds-primary);background:var(--ds-primary-soft);font-weight:600}
.site-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.site-login{
  font-size:13px;font-weight:600;color:#fff;background:var(--ds-primary);
  padding:7px 16px;border-radius:999px;transition:background .18s ease;
}
.site-login:hover{color:#fff;background:var(--ds-primary-hover)}
.site-reg{font-size:13px;color:var(--ds-text-2)}

/* ============ Articles 频道导航 ArticleChannelNav ============ */
.ch-nav{
  background:var(--ds-bg);
  border-bottom:1px solid var(--ds-border-soft);
  position:sticky;top:64px;z-index:90;
}
.ch-nav .container{
  display:flex;align-items:center;gap:2px;height:48px;overflow:visible;
}
.ch-nav-item{
  position:relative;
  font-size:14px;color:var(--ds-text-2);font-weight:500;
  padding:12px 14px;white-space:nowrap;transition:color .18s ease;
  border-bottom:2px solid transparent;margin-bottom:-1px;
}
.ch-nav-item:hover{color:var(--ds-primary)}
.ch-nav-item.active{color:var(--ds-primary);font-weight:600;border-bottom-color:var(--ds-primary)}
.ch-nav-more{
  position:relative;margin-left:auto;display:flex;align-items:center;
  font-size:14px;color:var(--ds-text-2);font-weight:500;
  padding:12px 14px;cursor:pointer;white-space:nowrap;
}
.ch-nav-more:hover{color:var(--ds-primary)}
.ch-nav-more .caret{font-size:10px;margin-left:4px;opacity:.6}
.ch-nav-more:hover .mega-menu{display:grid}

/* Mega Menu（更多） */
.mega-menu{
  display:none;
  position:absolute;top:100%;right:0;left:auto;width:640px;max-width:calc(100vw - 32px);
  grid-template-columns:repeat(2,1fr);gap:8px 24px;
  background:#fff;border:1px solid var(--ds-border-soft);border-radius:12px;
  box-shadow:0 16px 40px rgba(0,0,0,.10);padding:20px 24px;z-index:200;
}
.mega-menu .mm-col{min-width:0}
.mega-menu .mm-title{
  font-size:13px;font-weight:700;color:var(--ds-primary);margin:0 0 8px;padding-bottom:6px;border-bottom:1px solid var(--ds-border-soft);
}
.mega-menu .mm-links{display:flex;flex-wrap:wrap;gap:4px 10px;margin-bottom:12px}
.mega-menu .mm-links a{font-size:13px;color:var(--ds-text-2);padding:3px 8px;border-radius:6px}
.mega-menu .mm-links a:hover{color:var(--ds-primary);background:var(--ds-primary-soft)}
.mega-menu .mm-foot{margin-top:10px;padding-top:12px;border-top:1px solid var(--ds-border-soft);text-align:center}
.mega-menu .mm-foot a{font-size:13px;font-weight:600}

/* ============ 首页头条区 Hero ============ */
.hero{padding:32px 0 8px}
.hero .container{
  display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:40px;align-items:start;
}
.hero-featured{
  background:var(--ds-bg-alt);border:1px solid var(--ds-border-soft);
  border-radius:var(--ds-radius);overflow:hidden;transition:box-shadow .2s ease;
}
.hero-featured:hover{box-shadow:var(--ds-shadow-hover)}
.hero-fig{display:block;width:100%;aspect-ratio:16/9;overflow:hidden;background:var(--ds-primary-soft)}
.hero-fig img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease}
.hero-fig:hover img{transform:scale(1.015)}
.hero-fig .no-img{display:flex;align-items:center;justify-content:center;height:100%;color:var(--ds-primary);font-size:15px;font-weight:600;letter-spacing:1px}
.hero-body{padding:20px 24px 24px}
.hero-cat{
  display:inline-block;font-size:12px;font-weight:600;color:var(--ds-primary);
  background:var(--ds-primary-soft);border-radius:4px;padding:2px 8px;margin-bottom:10px;
}
.hero-title{font-size:26px;line-height:1.35;font-weight:700;color:var(--ds-text);margin-bottom:10px}
.hero-title a{color:inherit}
.hero-title a:hover{color:var(--ds-primary)}
.hero-desc{font-size:14px;line-height:1.6;color:var(--ds-text-2);margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.hero-meta{font-size:13px;color:var(--ds-text-3)}
.hero-meta .sep{margin:0 6px;color:var(--ds-border)}
.hero-list{display:flex;flex-direction:column}
.hero-list-title{font-size:15px;font-weight:700;color:var(--ds-text);margin-bottom:4px;padding-bottom:12px;border-bottom:1px solid var(--ds-border-soft)}
.hero-item{
  display:flex;align-items:baseline;gap:12px;padding:13px 0;
  border-bottom:1px solid var(--ds-border-soft);
}
.hero-item:last-child{border-bottom:none}
.hero-item .idx{font-size:13px;font-weight:700;color:var(--ds-border);flex-shrink:0;font-style:normal;min-width:20px}
.hero-list .hero-item:nth-child(2) .idx{color:var(--ds-primary)}
.side-list .hero-item:first-child .idx{color:var(--ds-primary)}
.hero-item .t{flex:1;min-width:0}
.hero-item .t a{font-size:14px;color:var(--ds-text);line-height:1.45;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hero-item .t a:hover{color:var(--ds-primary)}
.hero-item .tm{font-size:12px;color:var(--ds-text-3);flex-shrink:0}

/* ============ Section Header ============ */
.section{margin:48px 0 0}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;padding-bottom:12px;border-bottom:1px solid var(--ds-border-soft)}
.section-head .sh-left{display:flex;align-items:center;gap:10px;min-width:0}
.section-head .sh-bar{width:4px;height:20px;border-radius:2px;background:var(--ds-primary);flex-shrink:0}
.section-head h2{font-size:22px;font-weight:600;color:var(--ds-text);line-height:1.3;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.section-head .sh-sub{font-size:13px;color:var(--ds-text-3);margin-left:8px;white-space:nowrap}
.section-head .sh-more{font-size:13px;font-weight:600;flex-shrink:0}
.section-head .sh-more::after{content:" →";font-size:12px}

/* ============ ArticleCard Variant A: Featured ============ */
.card-feat{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:24px;align-items:start}
.card-feat .cf-main{
  background:#fff;border:1px solid var(--ds-border-soft);border-radius:var(--ds-radius);overflow:hidden;
  transition:box-shadow .2s ease;
}
.card-feat .cf-main:hover{box-shadow:var(--ds-shadow-hover)}
.cf-fig{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--ds-primary-soft)}
.cf-fig img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease}
.cf-fig:hover img{transform:scale(1.015)}
.cf-fig .no-img{display:flex;align-items:center;justify-content:center;height:100%;color:var(--ds-primary);font-size:14px;font-weight:600}
.cf-body{padding:18px 20px 20px}
.cf-cat{display:inline-block;font-size:12px;font-weight:600;color:var(--ds-primary);background:var(--ds-primary-soft);border-radius:4px;padding:2px 8px;margin-bottom:8px}
.cf-title{font-size:20px;line-height:1.4;font-weight:600;margin-bottom:8px}
.cf-title a{color:var(--ds-text)}
.cf-title a:hover{color:var(--ds-primary)}
.cf-desc{font-size:13px;color:var(--ds-text-2);line-height:1.6;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cf-meta{font-size:12px;color:var(--ds-text-3)}
.cf-side{display:flex;flex-direction:column}
.cf-side .cf-item{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--ds-border-soft);align-items:center}
.cf-side .cf-item:first-child{padding-top:0}
.cf-side .cf-item:last-child{border-bottom:none;padding-bottom:0}
.cf-side .cf-thumb{width:120px;height:76px;border-radius:6px;overflow:hidden;flex-shrink:0;background:var(--ds-bg-alt)}
.cf-side .cf-thumb img{width:100%;height:100%;object-fit:cover}
.cf-side .cf-noimg{width:120px;height:76px;border-radius:6px;background:var(--ds-primary-soft);display:flex;align-items:center;justify-content:center;font-size:11px;color:var(--ds-primary);flex-shrink:0}
.cf-side .cf-info{flex:1;min-width:0}
.cf-side .cf-info a{font-size:14px;font-weight:500;color:var(--ds-text);line-height:1.45;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cf-side .cf-info a:hover{color:var(--ds-primary)}
.cf-side .cf-info .cf-meta{font-size:12px;margin-top:4px}

/* ============ ArticleCard Variant B: Grid ============ */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cg-card{min-width:0;transition:box-shadow .2s ease;border-radius:var(--ds-radius)}
.cg-card:hover{box-shadow:var(--ds-shadow-hover)}
.cg-fig{display:block;aspect-ratio:16/9;border-radius:var(--ds-radius-sm);overflow:hidden;background:var(--ds-primary-soft);margin-bottom:12px}
.cg-fig img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease}
.cg-fig:hover img{transform:scale(1.015)}
.cg-fig .no-img{display:flex;align-items:center;justify-content:center;height:100%;color:var(--ds-primary);font-size:13px;font-weight:600}
.cg-cat{font-size:12px;font-weight:600;color:var(--ds-primary);margin-bottom:6px}
.cg-title{font-size:16px;line-height:1.45;font-weight:600;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cg-title a{color:var(--ds-text)}
.cg-title a:hover{color:var(--ds-primary)}
.cg-desc{font-size:13px;color:var(--ds-text-2);line-height:1.6;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cg-meta{font-size:12px;color:var(--ds-text-3)}

/* ============ ArticleListItem（长信息流） ============ */
.list-block{display:flex;flex-direction:column}
.li-item{display:flex;gap:20px;padding:20px 0;border-bottom:1px solid var(--ds-border-soft);align-items:flex-start}
.li-item:first-child{padding-top:0}
.li-item:last-child{border-bottom:none;padding-bottom:0}
.li-thumb{width:180px;height:112px;border-radius:var(--ds-radius-sm);overflow:hidden;flex-shrink:0;background:var(--ds-bg-alt)}
.li-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease}
.li-thumb:hover img{transform:scale(1.015)}
.li-noimg{width:180px;height:112px;border-radius:var(--ds-radius-sm);background:var(--ds-primary-soft);display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--ds-primary);flex-shrink:0}
.li-info{flex:1;min-width:0}
.li-cat{font-size:12px;font-weight:600;color:var(--ds-primary);margin-bottom:5px;display:inline-block}
.li-title{font-size:17px;line-height:1.5;font-weight:600;margin-bottom:6px}
.li-title a{color:var(--ds-text)}
.li-title a:hover{color:var(--ds-primary)}
.li-desc{font-size:14px;line-height:1.6;color:var(--ds-text-2);margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.li-meta{font-size:13px;color:var(--ds-text-3)}
.li-meta .sep{margin:0 6px;color:var(--ds-border)}

/* ============ 频道区（8 大频道） ============ */
.channel-section{margin-top:48px}
.channel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.ch-chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.ch-chip{font-size:12px;font-weight:500;color:var(--ds-text-2);background:var(--ds-bg-alt);border:1px solid var(--ds-border-soft);border-radius:999px;padding:3px 12px;transition:all .18s ease}
.ch-chip:hover{color:var(--ds-primary);background:var(--ds-primary-soft);border-color:var(--ds-primary-border)}
.ch-card{
  border:1px solid var(--ds-border-soft);border-radius:var(--ds-radius);
  padding:18px 20px;transition:box-shadow .2s ease;min-width:0;
}
.ch-card:hover{box-shadow:var(--ds-shadow-hover)}
.ch-card-head{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.ch-card-icon{width:30px;height:30px;border-radius:8px;background:var(--ds-primary-soft);color:var(--ds-primary);display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;flex-shrink:0}
.ch-card-name{font-size:16px;font-weight:700;color:var(--ds-text);flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ch-card-count{font-size:11px;color:var(--ds-text-3);flex-shrink:0;font-weight:400}
.ch-card-desc{font-size:12px;color:var(--ds-text-3);margin-bottom:12px;line-height:1.5}
.ch-card-list{display:flex;flex-direction:column}
.ch-card-item{display:flex;gap:10px;padding:8px 0;border-bottom:1px dashed var(--ds-border-soft);align-items:baseline}
.ch-card-item:last-child{border-bottom:none}
.ch-card-item .d{width:4px;height:4px;border-radius:50%;background:var(--ds-primary);flex-shrink:0;align-self:center}
.ch-card-item a{font-size:13px;color:var(--ds-text-2);line-height:1.45;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ch-card-item a:hover{color:var(--ds-primary)}
.ch-card-item .tm{font-size:11px;color:var(--ds-text-3);flex-shrink:0}
.ch-card-foot{margin-top:10px;padding-top:10px;border-top:1px solid var(--ds-border-soft);font-size:12px;font-weight:600}

/* ============ 全量文章索引（SEO 保留） ============ */
.full-index{margin-top:56px;background:var(--ds-bg-alt);border:1px solid var(--ds-border-soft);border-radius:var(--ds-radius);padding:28px 32px}
.fi-title{font-size:18px;font-weight:700;margin-bottom:6px}
.fi-sub{font-size:13px;color:var(--ds-text-3);margin-bottom:20px}
.fi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px 32px}
.fi-cat{display:block;margin-bottom:10px;border:1px solid var(--ds-border-soft);border-radius:8px;overflow:hidden;background:#fff}
.fi-cat>summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:10px;
  font-size:15px;font-weight:700;color:var(--ds-text);padding:10px 14px;
  border-left:3px solid var(--ds-primary);transition:background .18s ease;
}
.fi-cat>summary::-webkit-details-marker{display:none}
.fi-cat>summary:hover{background:var(--ds-primary-soft)}
.fi-cat[open]>summary{border-bottom:1px solid var(--ds-border-soft);background:var(--ds-primary-soft)}
.fi-cat .fi-cat-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fi-cat .fi-count{font-size:11px;font-weight:400;color:var(--ds-text-3);flex-shrink:0}
.fi-cat .fi-toggle{font-size:11px;color:var(--ds-primary);font-weight:600;flex-shrink:0}
.fi-cat[open] .fi-toggle::after{content:" · 收起"}
.fi-cat:not([open]) .fi-toggle::after{content:" · 展开"}
.fi-links{padding:8px 14px 6px}
.fi-tools{display:flex;justify-content:flex-end;margin-bottom:12px}
.fi-toggle-all{
  font-size:12px;font-weight:600;color:var(--ds-primary);background:var(--ds-primary-soft);
  border:1px solid var(--ds-primary-border);border-radius:999px;padding:5px 16px;cursor:pointer;
  transition:all .18s ease;
}
.fi-toggle-all:hover{color:#fff;background:var(--ds-primary)}
.fi-cat a{display:block;font-size:13px;color:var(--ds-text-2);line-height:1.5;padding:3px 0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fi-cat a:hover{color:var(--ds-primary)}

/* ============ Primary Search（Hero 下方） ============ */
.ds-search{padding:20px 0 0}
.ds-search .container{display:flex;justify-content:center}
.ds-search .search-box{margin-bottom:0;max-width:680px;width:100%}

/* ============ 最新文章 + Sidebar ============ */
.latest-section .container{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start}
.latest-main{min-width:0}
.latest-side{display:flex;flex-direction:column;gap:24px;min-width:0;position:sticky;top:120px}
.side-block{background:var(--ds-bg-alt);border:1px solid var(--ds-border-soft);border-radius:var(--ds-radius);padding:18px 20px}
.side-title{font-size:14px;font-weight:700;color:var(--ds-text);margin-bottom:6px;padding-bottom:10px;border-bottom:1px solid var(--ds-border-soft);display:flex;align-items:center;gap:8px}
.side-title::before{content:"";width:4px;height:14px;border-radius:2px;background:var(--ds-primary);flex-shrink:0}
.side-list{display:flex;flex-direction:column}
.side-list .hero-item{padding:10px 0}
.side-list .hero-item .t a{font-size:13px}
.side-list .hero-item .tm{font-size:11px}
.hot-cats{display:flex;flex-wrap:wrap;gap:8px;padding-top:10px}
.hot-cat{font-size:12px;font-weight:500;color:var(--ds-text-2);background:#fff;border:1px solid var(--ds-border-soft);border-radius:999px;padding:4px 12px;transition:all .18s ease}
.hot-cat:hover{color:var(--ds-primary);border-color:var(--ds-primary-border);background:var(--ds-primary-soft)}
.hot-cat em{font-style:normal;font-size:11px;color:var(--ds-text-3);margin-left:4px}
.side-stat{font-size:13px;color:var(--ds-text-2);line-height:1.8;padding-top:8px}

/* ============ 更多频道（三列小型区） ============ */
.mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}

/* ============ 频道差异化布局 ============ */
.ch-layout-b{grid-template-columns:repeat(2,1fr)}
.ch-layout-links{margin-top:20px}

/* ============ 站点 Footer ============ */
.site-footer{
  margin-top:64px;border-top:1px solid var(--ds-border-soft);
  padding:32px 0 28px;text-align:center;font-size:13px;color:var(--ds-text-3);
}
.site-footer .ft-nav{display:flex;justify-content:center;flex-wrap:wrap;gap:20px;margin-bottom:14px}
.site-footer .ft-nav a{color:var(--ds-text-2);font-size:13px}
.site-footer .ft-nav a:hover{color:var(--ds-primary)}
.site-footer .ft-info{color:var(--ds-text-3);font-size:12px;line-height:1.8}

/* ============================================================
   文章详情页（generateStaticHtml / article_tpl.css 共用）
   ============================================================ */
.art-body{background:var(--ds-bg);color:var(--ds-text);font-family:var(--ds-font);line-height:1.8}
.art-header{
  position:sticky;top:0;z-index:100;height:60px;
  background:rgba(255,255,255,.88);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--ds-border-soft);
  display:flex;align-items:center;justify-content:space-between;padding:0 20px;
}
.art-header .ah-brand{font-size:18px;font-weight:800;color:var(--ds-text);display:flex;align-items:center;gap:8px}
.art-header .ah-brand .brand-dot{width:9px;height:9px;border-radius:50%;background:var(--ds-primary);display:inline-block}
.art-header .ah-brand:hover{color:var(--ds-primary)}
.art-header .ah-nav{display:flex;align-items:center;gap:4px}
.art-header .ah-nav a{font-size:13px;color:var(--ds-text-2);padding:6px 12px;border-radius:8px;font-weight:500}
.art-header .ah-nav a:hover{color:var(--ds-primary);background:var(--ds-primary-soft)}
.art-header .ah-nav a.active{color:var(--ds-primary);background:var(--ds-primary-soft);font-weight:600}
.art-header .ah-login{font-size:12px;font-weight:600;color:#fff;background:var(--ds-primary);padding:6px 14px;border-radius:999px}
.art-header .ah-login:hover{color:#fff;background:var(--ds-primary-hover)}
.art-breadcrumb{max-width:var(--ds-read-w);margin:24px auto 0;padding:0 20px;font-size:13px;color:var(--ds-text-3)}
.art-breadcrumb a{color:var(--ds-text-3)}
.art-breadcrumb a:hover{color:var(--ds-primary)}
.art-breadcrumb .sep{margin:0 8px;color:var(--ds-border)}
.art-wrap{max-width:var(--ds-art-w);margin:0 auto;padding:32px 20px 56px}
.art-head{max-width:var(--ds-read-w);margin:0 auto 32px}
.art-head .art-cat{
  display:inline-block;font-size:12px;font-weight:600;color:var(--ds-primary);
  background:var(--ds-primary-soft);border-radius:4px;padding:3px 10px;margin-bottom:14px;
}
.art-head h1{font-size:30px;line-height:1.4;font-weight:700;color:var(--ds-text);margin-bottom:16px}
.art-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;font-size:13px;color:var(--ds-text-3);padding-bottom:20px;border-bottom:1px solid var(--ds-border-soft)}
.art-meta .sep{color:var(--ds-border)}
.art-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.art-tags a{font-size:12px;color:var(--ds-text-2);background:var(--ds-bg-alt);border:1px solid var(--ds-border-soft);border-radius:4px;padding:2px 9px}
.art-tags a:hover{color:var(--ds-primary);border-color:var(--ds-primary-border);background:var(--ds-primary-soft)}

/* 正文 ArticleContent */
.art-content{font-size:18px;line-height:1.85;color:var(--ds-text)}
.art-content p{margin:18px 0;text-align:justify;text-indent:2em}
.art-content h2{font-size:26px;line-height:1.4;font-weight:700;margin:44px 0 16px;color:var(--ds-text);padding-bottom:10px;border-bottom:1px solid var(--ds-border-soft)}
.art-content h3{font-size:21px;line-height:1.4;font-weight:700;margin:36px 0 12px;color:var(--ds-text)}
.art-content h4{font-size:18px;line-height:1.4;font-weight:700;margin:28px 0 10px;color:var(--ds-text)}
.art-content blockquote{
  margin:20px 0;padding:16px 20px;border-left:4px solid var(--ds-primary);
  background:var(--ds-bg-alt);border-radius:0 var(--ds-radius-sm) var(--ds-radius-sm) 0;
  color:var(--ds-text-2);font-size:15px;line-height:1.7;
}
.art-content blockquote p{margin:0}
.art-content ul,.art-content ol{margin:18px 0;padding-left:24px}
.art-content li{margin:8px 0}
.art-content a{color:var(--ds-primary);text-decoration:underline;text-underline-offset:3px}
.art-content strong{color:var(--ds-text);font-weight:700}
.art-content img{max-width:100%;height:auto;border-radius:10px;display:block;margin:24px auto}
.art-content figure{margin:24px 0}
.art-content figure img{border-radius:10px}
.art-content figcaption{font-size:13px;color:var(--ds-text-3);text-align:center;margin-top:8px}
.art-content table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px;line-height:1.6}
.art-content th{background:var(--ds-bg-alt);font-weight:600;text-align:left}
.art-content th,.art-content td{border:1px solid var(--ds-border);padding:9px 12px}
.art-content pre{
  background:#1F2329;color:#E5E7EB;border-radius:8px;padding:16px 18px;
  overflow-x:auto;font-size:13px;line-height:1.6;margin:20px 0;
}
.art-content code{font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;font-size:13px}
.art-content pre code{background:none;color:inherit;padding:0}
.art-content hr{border:none;border-top:1px solid var(--ds-border-soft);margin:32px 0}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* 文末微信号 / 页脚 */
.art-wechat{
  margin:36px 0 16px;padding:16px 20px;background:var(--ds-primary-soft);
  border:1px solid var(--ds-primary-border);border-radius:8px;text-align:center;
  font-size:15px;color:var(--ds-primary);font-weight:600;
}
.art-footer{
  margin-top:12px;padding:20px 0 16px;border-top:1px solid var(--ds-border-soft);
  text-align:center;font-size:14px;color:var(--ds-text-2);
}
.art-footer .brand{font-weight:700;color:var(--ds-text)}
.art-footer .domain{font-size:12px;color:var(--ds-text-3);margin-top:2px}
.art-disclaimer{font-size:12px;color:var(--ds-text-3);text-align:center;margin-top:10px}
.art-back{display:block;text-align:center;margin-top:14px;font-size:13px;font-weight:600}
.art-beian{font-size:12px;color:var(--ds-text-3);text-align:center;margin-top:8px}
.art-foot-nav{display:flex;justify-content:center;flex-wrap:wrap;gap:18px;margin:14px 0 6px}
.art-foot-nav a{color:var(--ds-text-2);font-size:13px}
.art-foot-nav a:hover{color:var(--ds-primary)}

/* latest.html（首页行业动态） */
.latest-wrap{max-width:var(--ds-max-w);margin:0 auto;padding:0 32px;font-family:var(--ds-font)}
.latest-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.latest-card{
  display:flex;align-items:center;gap:10px;background:var(--ds-bg);
  border:1px solid var(--ds-border-soft);border-radius:8px;padding:10px 14px;
  text-decoration:none;transition:all .18s ease;box-sizing:border-box;
}
.latest-card:hover{border-color:var(--ds-primary-border);background:var(--ds-primary-soft);box-shadow:var(--ds-shadow-hover)}
.latest-tag{
  flex-shrink:0;font-size:11px;color:var(--ds-primary);font-weight:600;
  background:var(--ds-primary-soft);padding:1px 7px;border-radius:4px;
  max-width:80px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.latest-title{flex:1;font-size:13px;font-weight:500;color:var(--ds-text);line-height:1.4;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.latest-time{flex-shrink:0;font-size:11px;color:var(--ds-text-3)}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .container{padding:0 24px}
  .latest-wrap{padding:0 24px}
  .channel-grid{grid-template-columns:repeat(2,1fr)}
  .fi-grid{grid-template-columns:repeat(2,1fr)}
  .latest-section .container{grid-template-columns:minmax(0,1fr) 260px;gap:28px}
  .mini-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .container{padding:0 16px}
  .latest-wrap{padding:0 16px}
  .site-nav{display:none}
  .ch-nav .container{overflow-x:auto;scrollbar-width:none}
  .ch-nav .container::-webkit-scrollbar{display:none}
  .ch-nav-item{padding:12px 12px}
  .ch-nav-more{display:none}
  .mega-menu{display:none !important}
  .hero{padding:20px 0 4px}
  .hero .container{grid-template-columns:1fr;gap:24px}
  .hero-title{font-size:22px}
  .card-feat{grid-template-columns:1fr}
  .card-grid{grid-template-columns:1fr}
  .li-item{flex-direction:column;gap:12px}
  .li-thumb{width:100%;height:auto;aspect-ratio:16/9}
  .li-noimg{width:100%;height:auto;aspect-ratio:16/9}
  .fi-grid{grid-template-columns:1fr}
  .ds-search{padding:16px 0 0}
  .latest-section .container{grid-template-columns:1fr;gap:0}
  .latest-side{position:static;gap:16px;margin-top:28px}
  .mini-grid{grid-template-columns:1fr}
  .ch-layout-b{grid-template-columns:1fr}
  .ch-layout-links{margin-top:16px}
  .section{margin:32px 0 0}
  .section-head h2{font-size:19px}
  .art-wrap{padding:24px 16px 48px}
  .art-head h1{font-size:24px}
  .art-content{font-size:16px;line-height:1.8}
  .art-content h2{font-size:22px;margin:32px 0 12px}
  .art-content h3{font-size:18px;margin:26px 0 10px}
  .art-header .ah-nav a{display:none}
  .art-header .ah-nav a.active{display:inline-block}
  .latest-row{grid-template-columns:1fr}
}
@media (max-width:480px){
  .channel-grid{grid-template-columns:1fr}
  .site-header .container{gap:12px}
  .site-brand{font-size:17px}
}

/* ============ 搜索页 SearchPage（Articles Search 与 Tools 同品牌） ============ */
.search-page{
  max-width:var(--ds-max-w);
  margin:0 auto;
  padding:48px 32px 64px;
}
.search-page .search-title{
  font-size:28px;font-weight:800;color:var(--ds-text);
  letter-spacing:.5px;margin-bottom:8px;
}
.search-page .search-sub{
  font-size:14px;color:var(--ds-text-3);margin-bottom:24px;
}
.search-box{
  display:flex;gap:12px;margin-bottom:32px;max-width:640px;
}
.search-box input{
  flex:1;height:46px;padding:0 18px;
  border:1.5px solid var(--ds-border);border-radius:var(--ds-radius);
  font-size:15px;font-family:var(--ds-font);outline:none;
  transition:border-color .18s ease, box-shadow .18s ease;
  background:#fff;color:var(--ds-text);
}
.search-box input:focus{
  border-color:var(--ds-primary);
  box-shadow:0 0 0 3px var(--ds-primary-soft);
}
.search-box button{
  height:46px;padding:0 28px;
  background:var(--ds-primary);color:#fff;
  border:none;border-radius:var(--ds-radius);
  font-size:14px;font-weight:600;cursor:pointer;
  transition:background .18s ease;
}
.search-box button:hover{background:var(--ds-primary-hover)}
.search-result-head{
  font-size:13px;color:var(--ds-text-3);margin-bottom:16px;
}
.search-result{
  display:block;
  background:var(--ds-bg);
  border:1px solid var(--ds-border-soft);
  border-radius:var(--ds-radius);
  padding:18px 20px;
  margin-bottom:12px;
  transition:box-shadow .18s ease, border-color .18s ease;
}
.search-result:hover{
  border-color:var(--ds-primary-border);
  box-shadow:var(--ds-shadow-hover);
}
.search-result .sr-title{
  font-size:16px;font-weight:600;color:var(--ds-text);
  display:block;margin-bottom:6px;
}
.search-result:hover .sr-title{color:var(--ds-primary)}
.search-result .sr-meta{font-size:12px;color:var(--ds-text-3);margin-bottom:6px}
.search-result .sr-snippet{font-size:13px;color:var(--ds-text-2);line-height:1.6}
.search-empty,.search-spin{
  padding:56px 20px;text-align:center;color:var(--ds-text-3);font-size:14px;
}
.search-spin{color:var(--ds-primary)}

/* ============ 步骤3：频道页 + 真实分类页 ============ */
.page-head{padding:34px 0 6px}
.page-head h1{font-size:28px;line-height:1.3;margin-bottom:8px}
.page-desc{font-size:13px;color:var(--ds-text-3)}
.page-desc a{color:var(--ds-primary)}
.art-block-title{font-size:17px;font-weight:700;margin:26px 0 14px;padding-left:10px;border-left:3px solid var(--ds-primary)}
.cat-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start;margin-top:8px}
.cat-main{min-width:0}
.feed-list{display:flex;flex-direction:column}
.li-body{flex:1;min-width:0}
.li-meta{display:flex;align-items:center;gap:12px;margin-top:6px}
.li-time{font-size:12px;color:var(--ds-text-3)}
.cat-side{display:flex;flex-direction:column;gap:20px;min-width:0;position:sticky;top:120px}
.cat-pager{display:flex;align-items:center;gap:6px;justify-content:center;margin:26px 0 8px;flex-wrap:wrap}
.pager-link{font-size:13px;color:var(--ds-text-2);background:#fff;border:1px solid var(--ds-border-soft);border-radius:6px;padding:5px 12px;transition:all .18s ease}
.pager-link:hover{color:var(--ds-primary);border-color:var(--ds-primary-border)}
.pager-cur{font-size:13px;font-weight:700;color:#fff;background:var(--ds-primary);border-radius:6px;padding:5px 13px}
.ch-featured{display:grid;grid-template-columns:1.25fr 1fr;gap:20px;margin:22px 0 6px}
.ch-feat-card{position:relative;border-radius:var(--ds-radius);padding:24px;background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;display:flex;flex-direction:column;gap:10px;justify-content:center;min-height:150px;overflow:hidden}
.ch-feat-card::after{content:"";position:absolute;right:-30px;top:-30px;width:140px;height:140px;border-radius:50%;background:rgba(255,255,255,.12)}
.ch-feat-tag{font-size:11px;font-weight:600;background:rgba(255,255,255,.2);border-radius:999px;padding:3px 10px;align-self:flex-start}
.ch-feat-title{font-size:20px;line-height:1.45;font-weight:700;margin:0}
.ch-feat-title a{color:#fff}
.ch-feat-title a:hover{text-decoration:underline}
.ch-feat-desc{font-size:13px;line-height:1.6;color:rgba(255,255,255,.85)}
.ch-feat-meta{font-size:12px;color:rgba(255,255,255,.7)}
.ch-feat-list{display:flex;flex-direction:column;justify-content:center;gap:0;background:var(--ds-bg-alt);border:1px solid var(--ds-border-soft);border-radius:var(--ds-radius);padding:10px 18px}
.ch-feat-item{font-size:14px;line-height:1.5;color:var(--ds-text);padding:11px 0;border-bottom:1px dashed var(--ds-border-soft)}
.ch-feat-item:last-child{border-bottom:none}
.ch-feat-item:hover{color:var(--ds-primary)}

/* ============ 步骤3：详情页 v3（目录/两栏/分享/上下篇/相关/更多） ============ */
.art-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:36px;align-items:start}
.art-layout:has(.art-side){grid-template-columns:minmax(0,1fr) 280px}
.art-main{min-width:0;max-width:840px;justify-self:center}
.art-title{font-size:27px;line-height:1.4;font-weight:700;margin:12px 0}
.art-meta{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--ds-text-3);font-size:12px;margin-bottom:6px}
.meta-item a{color:var(--ds-primary)}
.art-toc{display:flex;flex-direction:column;gap:2px;max-height:420px;overflow:auto}
.art-toc a{font-size:13px;line-height:1.6;color:var(--ds-text-2);padding:4px 8px;border-radius:6px;transition:all .15s ease}
.art-toc a:hover{color:var(--ds-primary);background:var(--ds-primary-soft)}
.art-toc-l1{font-weight:600;color:var(--ds-text)!important}
.art-toc-l2{padding-left:22px!important;font-size:12.5px!important}
.art-toc-l3{padding-left:40px!important;font-size:12px!important}
.art-toc-mobile{display:none;margin:10px 0 18px}
.art-toc-mobile summary{font-size:13px;font-weight:600;color:var(--ds-text);cursor:pointer;padding:10px 12px;background:var(--ds-bg-alt);border:1px solid var(--ds-border-soft);border-radius:8px;list-style:none}
.art-toc-mobile summary::-webkit-details-marker{display:none}
.art-toc-mobile .art-toc{padding:10px 6px 4px}
.art-side{display:flex;flex-direction:column;gap:20px;min-width:0;position:sticky;top:120px}
.art-side-block{background:var(--ds-bg-alt);border:1px solid var(--ds-border-soft);border-radius:var(--ds-radius);padding:18px 20px}
.art-side-title{font-size:14px;font-weight:700;margin-bottom:12px;padding-bottom:10px;border-bottom:1px solid var(--ds-border-soft)}
.side-rec{display:block;padding:9px 0;border-bottom:1px dashed var(--ds-border-soft)}
.side-rec:last-child{border-bottom:none}
.side-rec-title{display:block;font-size:13px;line-height:1.5;color:var(--ds-text)}
.side-rec:hover .side-rec-title{color:var(--ds-primary)}
.side-rec-cat{display:block;font-size:11px;color:var(--ds-text-3);margin-top:3px}
.art-share{display:flex;align-items:center;gap:8px;margin:20px 0 4px;padding-top:14px;border-top:1px solid var(--ds-border-soft)}
.art-share-label{font-size:12px;color:var(--ds-text-3)}
.art-share-btn{font-size:12px;color:var(--ds-primary);background:var(--ds-primary-soft);border:1px solid var(--ds-primary-border);border-radius:6px;padding:4px 12px;cursor:pointer;text-decoration:none;transition:all .15s ease}
.art-share-btn:hover{color:#fff;background:var(--ds-primary)}
.art-prevnext{display:flex;justify-content:space-between;gap:20px;margin:24px 0 4px;padding:14px 0;border-top:1px solid var(--ds-border-soft);border-bottom:1px solid var(--ds-border-soft)}
.pn-item{font-size:13px;color:var(--ds-text-3);line-height:1.6;flex:1;min-width:0}
.pn-item a{color:var(--ds-text);display:block}
.pn-item a:hover{color:var(--ds-primary)}
.pn-none{color:var(--ds-text-3)}
.pn-next{text-align:right}
.art-related{margin-top:30px}
.rel-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.rel-card{display:flex;flex-direction:column;gap:6px;background:var(--ds-bg-alt);border:1px solid var(--ds-border-soft);border-radius:10px;padding:14px 16px;transition:all .18s ease}
.rel-card:hover{border-color:var(--ds-primary-border);transform:translateY(-1px)}
.rel-cat{font-size:11px;font-weight:600;color:var(--ds-primary)}
.rel-title{font-size:14px;line-height:1.5;color:var(--ds-text)}
.rel-card:hover .rel-title{color:var(--ds-primary)}
.art-more{margin-top:30px}
.more-list{display:flex;flex-direction:column}
.more-item{font-size:14px;line-height:1.6;color:var(--ds-text-2);padding:8px 0;border-bottom:1px dashed var(--ds-border-soft)}
.more-item:hover{color:var(--ds-primary)}

/* ============ 步骤3 响应式 ============ */
@media (max-width:1199px){
  .cat-layout{grid-template-columns:minmax(0,1fr) 260px;gap:28px}
  .art-layout{grid-template-columns:minmax(0,1fr) 240px;gap:28px}
  .ch-featured{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .page-head h1{font-size:22px}
  .cat-layout{grid-template-columns:1fr;gap:0}
  .cat-side{position:static;margin-top:26px}
  .ch-featured{grid-template-columns:1fr;gap:14px}
  .art-layout{grid-template-columns:1fr;gap:0}
  .art-side{position:static;margin-top:26px}
  .art-toc-mobile{display:block}
  .art-title{font-size:21px}
  .rel-grid{grid-template-columns:1fr}
  .art-prevnext{flex-direction:column;gap:10px}
  .pn-next{text-align:left}
}