/* ==========================================================================
   MMN6 资源推广 · main.css
   ========================================================================== */

:root{
  --ink:#0d1526;
  --ink-soft:#2b3a52;
  --muted:#5d6b82;
  --muted-2:#7c889b;
  --line:#e7ecf3;
  --line-strong:#d8e0ec;
  --bg:#ffffff;
  --bg-soft:#f6f8fc;
  --bg-soft-2:#eef3fa;
  --accent:#1d4ed8;
  --accent-2:#3b82f6;
  --accent-soft:rgba(29,78,216,.08);
  --radius:16px;
  --radius-lg:22px;
  --shadow-sm:0 1px 2px rgba(13,21,38,.04), 0 8px 24px -16px rgba(13,21,38,.18);
  --shadow-md:0 2px 4px rgba(13,21,38,.04), 0 18px 40px -24px rgba(13,21,38,.22);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --max:1200px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.02em;line-height:1.25;color:var(--ink);}
p{margin:0;}
ul,ol{margin:0;padding:0;}
button{font:inherit;cursor:pointer;}
::selection{background:rgba(29,78,216,.14);}

.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 28px;}
.narrow{max-width:820px;}
.muted{color:var(--muted);}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
}
.btn:hover{transform:translateY(-1px);}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;box-shadow:0 10px 24px -12px rgba(29,78,216,.6);}
.btn-primary:hover{box-shadow:0 14px 30px -12px rgba(29,78,216,.7);}
.btn-ghost{background:#fff;border-color:var(--line-strong);color:var(--ink);}
.btn-ghost:hover{border-color:#c3cfe1;box-shadow:var(--shadow-sm);}
.btn-dark{background:var(--ink);color:#fff;}
.btn-light{background:#fff;color:var(--ink);}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  color:var(--accent);
}
.eyebrow.sm{font-size:12px;letter-spacing:.14em;color:var(--muted);}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(29,78,216,.12);}
.grad{background:linear-gradient(100deg,#1d4ed8 0%,#7c3aed 55%,#0f766e 100%);-webkit-background-clip:text;background-clip:text;color:transparent;}

.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:8px;
  font-size:12px;font-weight:600;letter-spacing:.02em;white-space:nowrap;
}
.tag-light{background:rgba(255,255,255,.9);color:var(--ink);}
.tag-glass{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.35);backdrop-filter:blur(6px);}
.tag-outline{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.5);}
.tag-soft{background:var(--accent-soft);color:var(--accent);}
.tag-top{background:#fff2e0;color:#b45309;}
.dot-sep{width:3px;height:3px;border-radius:50%;background:currentColor;opacity:.4;display:inline-block;}
.chip{display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;border:1px solid var(--line-strong);font-size:14px;color:var(--ink-soft);transition:.18s;}
.chip:hover{border-color:var(--accent);color:var(--accent);}

.link-arrow,.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--accent);}
.link-arrow svg,.link-more svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s;}
.link-arrow:hover svg,.link-more:hover svg{transform:translateX(3px);}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid transparent;
  transition:border-color .2s, box-shadow .2s;
}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 6px 20px -18px rgba(13,21,38,.5);}
.header-inner{display:flex;align-items:center;gap:28px;height:76px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),#7c3aed);color:#fff;
  font-weight:800;font-size:19px;letter-spacing:-.03em;box-shadow:0 8px 18px -10px rgba(29,78,216,.8);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text b{font-size:17px;letter-spacing:.02em;}
.brand-text i{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.18em;}
.nav{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav a{
  position:relative;padding:8px 12px;border-radius:9px;font-size:15px;font-weight:500;color:var(--ink-soft);
  transition:color .16s, background .16s;
}
.nav a:hover{color:var(--accent);background:var(--accent-soft);}
.nav a.is-active{color:var(--accent);font-weight:600;}
.nav a.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--accent);}
.search-mini{
  margin-left:auto;display:flex;align-items:center;gap:8px;height:40px;padding:0 12px;
  border:1px solid var(--line);border-radius:11px;background:var(--bg-soft);min-width:190px;
  transition:border-color .18s, background .18s;
}
.search-mini:focus-within{border-color:var(--accent);background:#fff;}
.search-mini svg{width:16px;height:16px;fill:none;stroke:var(--muted);stroke-width:1.9;stroke-linecap:round;flex:none;}
.search-mini input{border:0;background:transparent;outline:none;font-size:14px;width:100%;color:var(--ink);}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:11px;background:#fff;padding:0;place-items:center;gap:4px;}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);margin:3px auto;transition:.2s;}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:84px 0 96px;background:linear-gradient(180deg,#fbfcff 0%,#ffffff 70%);}
.hero-bg{position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(900px 420px at 8% -10%, rgba(29,78,216,.10), transparent 60%),
    radial-gradient(700px 380px at 88% 4%, rgba(124,58,237,.10), transparent 62%),
    radial-gradient(600px 300px at 60% 100%, rgba(15,118,110,.06), transparent 70%);
}
.hero-bg::after{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(13,21,38,.035) 1px, transparent 1px),linear-gradient(90deg, rgba(13,21,38,.035) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 30%, #000 0%, transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%, #000 0%, transparent 72%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:64px;align-items:center;}
.hero-copy h1{font-size:clamp(34px,4vw,56px);line-height:1.14;margin:20px 0 20px;letter-spacing:-.03em;}
.hero-sub{font-size:17px;color:var(--ink-soft);max-width:520px;line-height:1.85;}
.hero-actions{display:flex;gap:12px;margin:32px 0 40px;flex-wrap:wrap;}
.hero-stats{display:flex;gap:40px;margin:0;padding-top:28px;border-top:1px solid var(--line);}
.hero-stats dt{font-size:26px;font-weight:700;letter-spacing:-.02em;}
.hero-stats dd{margin:2px 0 0;font-size:13px;color:var(--muted);}

.hero-featured{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow-md);transition:transform .22s, box-shadow .22s;
}
.hero-featured:hover{transform:translateY(-4px);box-shadow:0 28px 60px -34px rgba(13,21,38,.4);}
.hero-featured-top{position:relative;height:170px;display:flex;align-items:flex-start;gap:8px;padding:16px;overflow:hidden;}
.hero-featured-top::after{content:"";position:absolute;inset:0;background:radial-gradient(120% 120% at 80% 0%, rgba(255,255,255,.35), transparent 60%);}
.hf-mark{position:absolute;right:10px;bottom:-26px;font-size:168px;font-weight:800;line-height:1;color:rgba(255,255,255,.18);letter-spacing:-.06em;pointer-events:none;}
.hf-ring{position:absolute;left:-30px;bottom:-60px;width:150px;height:150px;border-radius:50%;border:22px solid rgba(255,255,255,.08);pointer-events:none;}
.hero-featured-body{padding:24px 24px 22px;}
.hero-featured-body h2{font-size:20px;line-height:1.45;}
.hero-featured-body p{margin-top:10px;font-size:14px;color:var(--muted);line-height:1.75;}
.hero-featured-meta{display:flex;align-items:center;justify-content:space-between;margin-top:18px;font-size:13px;color:var(--muted-2);}

/* ---------- 区块 ---------- */
.section{padding:88px 0;}
.section-tight{padding:40px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:40px;}
.section-head h2{font-size:clamp(24px,2.4vw,34px);margin-top:12px;}
.section-desc{max-width:340px;font-size:14.5px;color:var(--muted);line-height:1.8;}

/* ---------- 分类卡片 ---------- */
.section-cats{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.cat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.cat-card{
  position:relative;display:flex;flex-direction:column;min-height:248px;
  padding:26px 24px 22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:transform .22s, box-shadow .22s, border-color .22s;
}
.cat-card::before{content:"";position:absolute;left:0;top:0;height:3px;width:100%;background:linear-gradient(90deg,var(--c1),var(--c2));opacity:.9;}
.cat-card::after{content:"";position:absolute;right:-40px;top:-40px;width:150px;height:150px;border-radius:50%;background:radial-gradient(circle,var(--c2),transparent 68%);opacity:.10;transition:opacity .22s;}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--line-strong);}
.cat-card:hover::after{opacity:.18;}
.cat-num{font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--muted-2);}
.cat-icon{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;margin:16px 0 18px;background:linear-gradient(135deg,var(--c1),var(--c2));box-shadow:0 10px 22px -14px var(--c2);}
.cat-icon svg{width:22px;height:22px;fill:none;stroke:#fff;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.cat-card h3{font-size:19px;}
.cat-card p{margin-top:8px;font-size:13.5px;color:var(--muted);line-height:1.72;flex:1;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.cat-foot{display:flex;align-items:center;justify-content:space-between;margin-top:20px;padding-top:14px;border-top:1px solid var(--line);}
.cat-foot em{font-style:normal;font-size:13px;color:var(--muted-2);}
.cat-foot svg{width:17px;height:17px;fill:none;stroke:var(--c1);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s;}
.cat-card:hover .cat-foot svg{transform:translateX(4px);}

/* ---------- 文章卡片 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px;}
.post-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .22s, box-shadow .22s, border-color .22s;}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--line-strong);}
.post-cover{position:relative;height:150px;display:flex;align-items:center;justify-content:center;}
.post-cover::after{content:"";position:absolute;inset:0;background:radial-gradient(120% 120% at 78% 10%, rgba(255,255,255,.32), transparent 62%);}
.post-letter{font-size:52px;font-weight:800;color:rgba(255,255,255,.9);letter-spacing:-.04em;text-shadow:0 6px 24px rgba(0,0,0,.18);}
.post-cover .tag{position:absolute;left:14px;bottom:14px;z-index:1;}
.post-body{display:flex;flex-direction:column;flex:1;padding:20px 22px 22px;}
.post-body h3{font-size:17px;line-height:1.5;}
.post-body h3{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.9em;}
.post-body p{margin-top:9px;font-size:13.5px;color:var(--muted);line-height:1.75;flex:1;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-meta{display:flex;align-items:center;gap:10px;margin-top:16px;font-size:12.5px;color:var(--muted-2);}

/* ---------- 列表行 ---------- */
.list-grid{display:flex;flex-direction:column;gap:16px;}
.post-row{
  display:grid;grid-template-columns:180px minmax(0,1fr) 40px;gap:24px;align-items:center;
  padding:18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  transition:transform .2s, box-shadow .2s, border-color .2s;
}
.post-row:hover{transform:translateX(3px);box-shadow:var(--shadow-sm);border-color:var(--line-strong);}
.post-row-cover{height:118px;border-radius:12px;display:grid;place-items:center;overflow:hidden;}
.post-row-cover .post-letter{font-size:38px;}
.post-row-tags{display:flex;gap:8px;margin-bottom:8px;}
.post-row-body h3{font-size:18px;}
.post-row-body p{margin-top:7px;font-size:13.5px;color:var(--muted);line-height:1.72;}
.post-row-arrow{width:36px;height:36px;border-radius:50%;border:1px solid var(--line-strong);display:grid;place-items:center;justify-self:end;}
.post-row-arrow svg{width:16px;height:16px;fill:none;stroke:var(--ink-soft);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s;}
.post-row:hover .post-row-arrow{border-color:var(--accent);}
.post-row:hover .post-row-arrow svg{stroke:var(--accent);transform:translateX(2px);}

/* ---------- 分类页头 ---------- */
.cat-hero{position:relative;padding:64px 0 56px;color:#fff;background:linear-gradient(120deg,var(--c1),var(--c2));overflow:hidden;}
.cat-hero::after{content:"";position:absolute;inset:0;background:radial-gradient(80% 120% at 85% 0%, rgba(255,255,255,.28), transparent 60%);}
.cat-hero .wrap{position:relative;}
.cat-hero h1{font-size:clamp(30px,3.4vw,46px);color:#fff;margin:14px 0 12px;}
.cat-hero-sub{font-size:16px;color:rgba(255,255,255,.86);max-width:640px;}
.cat-hero-meta{display:flex;align-items:center;gap:12px;margin-top:22px;font-size:13.5px;color:rgba(255,255,255,.8);}
.lead{font-size:17px;color:var(--ink-soft);line-height:1.9;padding-left:18px;border-left:3px solid var(--accent);}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted-2);margin-bottom:6px;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--accent);}
.crumb em{font-style:normal;color:var(--ink-soft);}
.crumb-light,.crumb-light a{color:rgba(255,255,255,.78);}
.crumb-light em{color:#fff;}

/* ---------- 分页 ---------- */
.pager{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:48px;flex-wrap:wrap;}
.pager-btn{display:inline-flex;align-items:center;justify-content:center;min-width:42px;height:42px;padding:0 14px;border-radius:11px;border:1px solid var(--line);background:#fff;font-size:14px;color:var(--ink-soft);transition:.18s;}
.pager-btn:hover{border-color:var(--accent);color:var(--accent);}
.pager-btn.is-current{background:var(--ink);border-color:var(--ink);color:#fff;font-weight:600;}
.pager-gap{color:var(--muted-2);}

/* ---------- 文章页 ---------- */
.article-head{padding:56px 0 40px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fbfcff,#fff);}
.article-head h1{font-size:clamp(28px,3.2vw,44px);line-height:1.28;margin:16px 0 0;letter-spacing:-.025em;}
.article-tags{display:flex;gap:8px;margin-bottom:14px;}
.article-sub{margin-top:14px;font-size:17px;color:var(--muted);line-height:1.8;}
.article-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:22px;font-size:13.5px;color:var(--muted-2);}
.article-tagline{display:inline-flex;gap:10px;}
.article-tagline a{color:var(--muted);}
.article-tagline a:hover{color:var(--accent);}
.article-lead{margin:40px 0 0;padding:22px 24px;border-radius:14px;background:var(--bg-soft);border:1px solid var(--line);font-size:15.5px;color:var(--ink-soft);line-height:1.85;}

.prose{padding:36px 0 8px;font-size:16.5px;line-height:1.95;color:var(--ink-soft);}
.prose > * + *{margin-top:22px;}
.prose h2{font-size:24px;margin-top:48px;padding-top:8px;color:var(--ink);}
.prose h2:first-child{margin-top:0;}
.prose h3{font-size:19px;margin-top:34px;color:var(--ink);}
.prose h4{font-size:16.5px;margin-top:26px;color:var(--ink);}
.prose p{color:var(--ink-soft);}
.prose strong{color:var(--ink);font-weight:650;}
.prose a{color:var(--accent);border-bottom:1px solid rgba(29,78,216,.28);}
.prose a:hover{border-bottom-color:var(--accent);}
.prose ul,.prose ol{padding-left:22px;}
.prose li{margin:8px 0;}
.prose li::marker{color:var(--accent);}
.prose blockquote{margin:30px 0;padding:18px 24px;border-left:3px solid var(--accent);background:var(--bg-soft);border-radius:0 12px 12px 0;color:var(--ink-soft);}
.prose blockquote p{margin:0;}
.prose code{font-family:var(--mono);font-size:.9em;background:var(--bg-soft-2);padding:2px 6px;border-radius:6px;color:#0f766e;}
.prose pre{background:#0d1526;color:#e6edf7;padding:20px 22px;border-radius:14px;overflow:auto;font-size:13.5px;line-height:1.7;}
.prose pre code{background:none;color:inherit;padding:0;}
.prose table{width:100%;border-collapse:collapse;font-size:14.5px;margin:26px 0;border:1px solid var(--line);border-radius:12px;overflow:hidden;display:table;}
.prose th,.prose td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left;}
.prose th{background:var(--bg-soft);font-weight:600;color:var(--ink);font-size:13.5px;letter-spacing:.02em;}
.prose tr:last-child td{border-bottom:0;}
.prose hr{border:0;border-top:1px solid var(--line);margin:40px 0;}
.prose img{border-radius:12px;width:100%;height:auto;border:1px solid var(--line);}
.prose figure{margin:26px 0;}
.prose figure img{margin:0;}
.prose figcaption{margin-top:9px;font-size:12.5px;color:var(--muted-2);text-align:center;line-height:1.6;}

.cta-box{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  margin:44px 0 8px;padding:28px 30px;border-radius:var(--radius);
  background:linear-gradient(120deg,#f2f7ff,#f7f4ff);border:1px solid #dde7f7;
}
.cta-box h3{font-size:19px;}
.cta-box p{margin-top:6px;font-size:13.5px;color:var(--muted);max-width:520px;}

.article-foot{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;margin:44px 0 0;padding:22px 0 0;border-top:1px solid var(--line);}
.article-share{display:flex;align-items:center;gap:14px;font-size:13.5px;color:var(--muted-2);}
.article-share a{color:var(--muted);}
.article-share a:hover{color:var(--accent);}
.section-related{background:var(--bg-soft);border-top:1px solid var(--line);}

/* ---------- 为什么 ---------- */
.why-inner{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:64px;align-items:start;}
.why-copy h2{font-size:clamp(24px,2.4vw,34px);margin:12px 0 16px;}
.why-copy p{font-size:15.5px;color:var(--muted);line-height:1.85;margin-bottom:26px;}
.why-list{display:flex;flex-direction:column;gap:18px;}
.why-item{position:relative;padding:24px 26px 24px 84px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:box-shadow .2s,border-color .2s;}
.why-item:hover{box-shadow:var(--shadow-sm);border-color:var(--line-strong);}
.why-idx{position:absolute;left:24px;top:24px;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--accent);background:var(--accent-soft);border-radius:8px;padding:4px 8px;}
.why-item h3{font-size:17px;}
.why-item p{margin-top:8px;font-size:14px;color:var(--muted);line-height:1.75;}

/* ---------- CTA 条 ---------- */
.cta-band{background:var(--ink);color:#fff;padding:64px 0;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;}
.cta-inner h2{font-size:clamp(22px,2.2vw,30px);color:#fff;}
.cta-inner p{margin-top:10px;color:rgba(255,255,255,.66);font-size:15px;}

/* ---------- 页脚 ---------- */
.site-footer{background:#0a1020;color:rgba(255,255,255,.68);padding:68px 0 0;}
.footer-top{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,.7fr));gap:48px;padding-bottom:52px;}
.brand-light .brand-text b{color:#fff;}
.brand-light .brand-text i{color:rgba(255,255,255,.45);}
.footer-brand p{margin-top:18px;font-size:13.5px;line-height:1.85;max-width:330px;color:rgba(255,255,255,.62);}
.footer-col{display:flex;flex-direction:column;gap:11px;}
.footer-col h4{font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.4);margin-bottom:4px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.78);transition:color .16s;}
.footer-col a:hover{color:#fff;}
.footer-note p{font-size:12.5px;line-height:1.85;color:rgba(255,255,255,.55);}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:22px 0 26px;border-top:1px solid rgba(255,255,255,.08);font-size:12.5px;color:rgba(255,255,255,.5);}

/* ---------- 搜索 / 空状态 ---------- */
.search-big{display:flex;align-items:center;gap:12px;margin:26px 0 0;height:60px;padding:0 8px 0 20px;background:#fff;border:1px solid var(--line-strong);border-radius:15px;box-shadow:var(--shadow-sm);}
.search-big:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px rgba(29,78,216,.08);}
.search-big svg{width:20px;height:20px;fill:none;stroke:var(--muted);stroke-width:1.9;stroke-linecap:round;flex:none;}
.search-big input{flex:1;border:0;outline:none;font-size:16px;background:transparent;min-width:0;}
.search-big .btn{height:44px;}
.search-summary{margin-top:20px;font-size:14px;color:var(--muted);}
.search-summary b{color:var(--ink);}
.page-hero{padding:64px 0 8px;}
.page-hero-soft{background:var(--bg-soft);border-bottom:1px solid var(--line);padding:56px 0 40px;}
.filter-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px;}
.chip.is-on{background:var(--ink);border-color:var(--ink);color:#fff;}
.page-hero h1{font-size:clamp(30px,3.4vw,44px);margin:14px 0 12px;}
.page-hero-sub{font-size:17px;color:var(--muted);}
.empty-state{padding:64px 0;text-align:center;}
.empty-state h1,.empty-state h2{font-size:26px;margin-bottom:14px;}
.empty-state p{color:var(--muted);margin-bottom:20px;}
.empty-code{font-size:13px;font-weight:700;letter-spacing:.24em;color:var(--accent);margin-bottom:12px;}
.empty-cats{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:8px;}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease, transform .5s ease;}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .hero-inner{grid-template-columns:1fr;gap:44px;}
  .hero-featured{max-width:520px;}
  .cat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .why-inner{grid-template-columns:1fr;gap:36px;}
  .footer-top{grid-template-columns:1fr 1fr;gap:36px;}
  .search-mini{display:none;}
}
@media (max-width:820px){
  .wrap{padding:0 20px;}
  .header-inner{height:66px;gap:12px;}
  .nav-toggle{display:grid;}
  .nav{
    position:absolute;left:0;right:0;top:66px;flex-direction:column;align-items:stretch;gap:2px;
    background:#fff;border-bottom:1px solid var(--line);padding:12px 20px 18px;margin:0;
    box-shadow:0 20px 30px -24px rgba(13,21,38,.5);
    display:none;
  }
  .nav.is-open{display:flex;}
  .nav a{padding:12px 10px;font-size:15px;}
  .nav a.is-active::after{display:none;}
  .hero{padding:52px 0 64px;}
  .hero-stats{gap:26px;}
  .section{padding:60px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:28px;}
  .section-desc{max-width:none;}
  .post-grid{grid-template-columns:1fr;}
  .post-row{grid-template-columns:110px minmax(0,1fr);gap:16px;padding:14px;}
  .post-row-cover{height:96px;}
  .post-row-arrow{display:none;}
  .post-row-body h3{font-size:16px;}
  .post-row-body p{display:none;}
  .article-head{padding:40px 0 30px;}
  .prose{font-size:16px;}
  .footer-top{grid-template-columns:1fr;gap:32px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cat-hero{padding:44px 0 40px;}
  .hero-featured-body{padding:20px;}
}
@media (max-width:560px){
  .cat-grid{grid-template-columns:1fr;}
  .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
  .hero-stats dt{font-size:22px;}
  .post-row{grid-template-columns:84px minmax(0,1fr);}
  .post-row-cover{height:84px;}
  .cta-box{padding:22px;}
  .search-big{height:54px;padding-left:14px;gap:8px;}
  .search-big input{font-size:14px;}
  .search-big .btn{padding:0 16px;}
}

/* ==========================================================================
   高清屏 / 大屏（1920、2K、4K）与 iPad 适配
   ========================================================================== */
body{overflow-x:hidden;}
input[type="search"]{-webkit-appearance:none;appearance:none;}
@media (hover:none){
  a,button,input{-webkit-tap-highlight-color:transparent;}
  .nav a,.chip,.btn{min-height:44px;}
}

/* 排版随视口放大，避免 4K 下字太小 */
.hero-copy h1{font-size:clamp(34px,3.1vw,64px);}
.section-head h2{font-size:clamp(24px,1.9vw,40px);}
.cat-hero h1{font-size:clamp(30px,2.5vw,52px);}
.article-head h1{font-size:clamp(28px,2.4vw,50px);}
.page-hero h1{font-size:clamp(30px,2.5vw,50px);}
.hero-sub{font-size:clamp(16px,1.02vw,19px);}
.prose{font-size:clamp(16px,.95vw,18px);}
.prose h2{font-size:clamp(22px,1.5vw,28px);}
.post-body h3{font-size:clamp(16px,.95vw,19px);}
.why-copy h2,.cta-inner h2{font-size:clamp(24px,1.7vw,36px);}

@media (min-width:1400px){
  .wrap{max-width:1280px;}
}
@media (min-width:1700px){
  .wrap{max-width:1400px;}
  .section{padding:100px 0;}
  .hero{padding:96px 0 108px;}
  .hero-inner{gap:78px;}
  .cat-grid,.post-grid{gap:28px;}
  .post-cover{height:172px;}
  .hero-featured-top{height:190px;}
}
@media (min-width:2400px){
  .wrap{max-width:1600px;}
  .cat-card{min-height:270px;}
  .post-cover{height:186px;}
  .hero{padding:112px 0 124px;}
  .hero-bg::after{background-size:80px 80px;}
}

/* iPad 竖屏 / 横屏（768–1024） */
@media (min-width:768px) and (max-width:1024px){
  .header-inner{height:72px;gap:16px;}
  .hero{padding:64px 0 76px;}
  .hero-inner{gap:40px;}
  .hero-featured{max-width:none;}
  .post-row{grid-template-columns:150px minmax(0,1fr) 36px;}
  .post-row-cover{height:110px;}
  .post-row-body p{display:block;}
  .post-row-arrow{display:grid;}
  .cat-grid{gap:16px;}
  .article-head{padding:44px 0 32px;}
  .footer-top{gap:32px;}
}
@media (max-width:560px){
  .post-row-body p{display:none;}
}
/* 手机端宽表格横向滚动，避免撑破布局 */
@media (max-width:680px){
  .prose table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;}
  .reveal{opacity:1!important;transform:none!important;}
}
/* 移动/平板：搜索框隐藏时，汉堡按钮靠右 */
@media (max-width:1080px){
  .nav-toggle{margin-left:auto;}
}

/* ---------- 平板（iPad 竖屏/横屏 768–1024）双列布局 ---------- */
@media (min-width:768px) and (max-width:1024px){
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
  .post-cover{height:146px;}
  .section-head{flex-direction:row;align-items:flex-end;gap:24px;margin-bottom:30px;}
  .section-desc{max-width:300px;}
  .hero-stats{gap:34px;}
  .cta-inner{flex-direction:row;align-items:center;}
  .footer-top{grid-template-columns:1.3fr 1fr 1fr;gap:28px;}
  .footer-note{grid-column:1 / -1;}
}

/* ---------- 2K / 4K 大屏：容器与字号同步放大 ---------- */
@media (min-width:2000px){
  .wrap{max-width:1520px;}
  .nav a{font-size:16px;}
  .hero-sub{font-size:19px;}
  .post-body h3{font-size:19px;}
  .post-body p{font-size:14.5px;}
  .cat-card p{font-size:14.5px;}
  .post-cover{height:186px;}
  .post-meta{font-size:13.5px;}
}
@media (min-width:2400px){
  .wrap{max-width:1700px;}
  .btn{height:54px;padding:0 30px;font-size:16px;}
  .nav a{font-size:17px;padding:10px 14px;}
  .brand-mark{width:42px;height:42px;font-size:22px;}
  .brand-text b{font-size:19px;}
  .hero-copy h1{font-size:74px;}
  .hero-sub{font-size:21px;max-width:600px;}
  .hero-stats dt{font-size:32px;}
  .hero-stats dd{font-size:15px;}
  .section-head h2{font-size:44px;}
  .section-desc{font-size:16px;max-width:380px;}
  .cat-card{min-height:290px;padding:30px 28px 26px;}
  .cat-card h3{font-size:22px;}
  .cat-card p{font-size:15px;}
  .cat-num{font-size:13px;}
  .post-cover{height:208px;}
  .post-letter{font-size:66px;}
  .post-body{padding:24px 26px 26px;}
  .post-body h3{font-size:21px;}
  .post-body p{font-size:15.5px;}
  .post-meta{font-size:14px;}
  .post-row-cover{height:140px;}
  .post-row-body h3{font-size:22px;}
  .post-row-body p{font-size:15px;}
  .prose{font-size:19px;}
  .prose h2{font-size:31px;}
  .prose h3{font-size:23px;}
  .article-head h1{font-size:56px;}
  .cat-hero h1{font-size:62px;}
  .cat-hero-sub{font-size:19px;}
  .lead{font-size:19px;}
  .why-item h3{font-size:20px;}
  .why-item p{font-size:15.5px;}
  .footer-col a{font-size:16px;}
  .footer-brand p,.footer-note p{font-size:15px;}
  .footer-bottom{font-size:14px;}
  .pager-btn{min-width:50px;height:50px;font-size:16px;}
  .tag{height:30px;font-size:13px;}
  .chip{height:42px;font-size:15px;}
  .search-mini{height:46px;min-width:250px;}
  .search-mini input{font-size:15px;}
}


/* ==========================================================================
   v1.1 密度与字阶收紧：字号降一档、留白收紧、容器收窄，避免大屏发空
   （放在文件末尾，覆盖前面的所有尺寸规则，包括 2K/4K 分档）
   ========================================================================== */
body{font-size:15.5px;line-height:1.72;}
.wrap{max-width:1200px;}

/* 头部 */
.header-inner{height:68px;gap:22px;}
.brand-mark{width:34px;height:34px;font-size:18px;}
.brand-text b{font-size:16px;}
.brand-text i{font-size:10.5px;}
.nav a{font-size:14.5px;padding:7px 11px;}
.search-mini{height:38px;min-width:180px;}
.search-mini input{font-size:13.5px;}

/* Hero */
.hero{padding:52px 0 56px;}
.hero-inner{gap:48px;}
.eyebrow{font-size:12px;}
.hero-copy h1{font-size:clamp(30px,2.35vw,46px);line-height:1.16;margin:14px 0 16px;}
.hero-sub{font-size:15.5px;line-height:1.8;max-width:500px;}
.hero-actions{margin:24px 0 28px;gap:10px;}
.btn{height:44px;padding:0 22px;font-size:14px;border-radius:10px;}
.hero-stats{gap:34px;padding-top:20px;}
.hero-stats dt{font-size:23px;}
.hero-stats dd{font-size:12px;}
.hero-featured-top{height:146px;}
.hf-mark{font-size:140px;bottom:-22px;}
.hero-featured-body{padding:18px 20px 18px;}
.hero-featured-body h2{font-size:17px;}
.hero-featured-body p{font-size:13px;line-height:1.7;margin-top:8px;}
.hero-featured-meta{margin-top:14px;font-size:12.5px;}

/* 区块节奏 */
.section{padding:56px 0;}
.section-tight{padding:28px 0;}
.section-head{margin-bottom:24px;gap:32px;}
.section-head h2{font-size:clamp(22px,1.5vw,30px);margin-top:10px;}
.section-desc{font-size:13px;max-width:310px;line-height:1.75;}

/* 分类卡 */
.cat-grid{gap:16px;}
.cat-card{min-height:210px;padding:20px 20px 16px;}
.cat-num{font-size:11px;}
.cat-icon{width:38px;height:38px;border-radius:11px;margin:12px 0 13px;}
.cat-icon svg{width:19px;height:19px;}
.cat-card h3{font-size:17px;}
.cat-card p{font-size:12.8px;margin-top:6px;line-height:1.65;}
.cat-foot{margin-top:14px;padding-top:12px;}
.cat-foot em{font-size:12px;}

/* 文章卡 */
.post-grid{gap:20px;}
.post-cover{height:130px;}
.post-letter{font-size:42px;}
.post-body{padding:16px 18px 16px;}
.post-body h3{font-size:15.5px;line-height:1.5;}
.post-body p{font-size:13px;margin-top:7px;line-height:1.7;}
.post-meta{font-size:12px;margin-top:11px;gap:8px;}
.tag{height:24px;padding:0 9px;font-size:11.5px;}

/* 列表行 */
.list-grid{gap:12px;}
.post-row{grid-template-columns:150px minmax(0,1fr) 36px;gap:20px;padding:14px;}
.post-row-cover{height:100px;}
.post-row-cover .post-letter{font-size:32px;}
.post-row-body h3{font-size:17px;}
.post-row-body p{font-size:13px;margin-top:6px;}
.post-row-tags{margin-bottom:6px;}

/* 我们的标准 */
.why-inner{gap:48px;align-items:center;}
.why-copy h2{font-size:clamp(22px,1.5vw,30px);margin:10px 0 12px;}
.why-copy p{font-size:14px;margin-bottom:20px;line-height:1.8;}
.why-list{gap:14px;}
.why-item{padding:18px 20px 18px 72px;}
.why-idx{left:18px;top:18px;font-size:12px;padding:3px 7px;}
.why-item h3{font-size:16px;}
.why-item p{font-size:13px;margin-top:6px;}

/* CTA / 页脚 */
.cta-band{padding:52px 0;}
.cta-inner h2{font-size:clamp(20px,1.4vw,26px);}
.cta-inner p{font-size:14px;margin-top:8px;}
.site-footer{padding:52px 0 0;}
.footer-top{gap:40px;padding-bottom:38px;}
.footer-brand p{font-size:12.5px;margin-top:14px;}
.footer-col a{font-size:13px;}
.footer-col h4{font-size:11px;}
.footer-note p{font-size:12px;}
.footer-bottom{font-size:12px;padding:18px 0 22px;}

/* 内页 */
.cat-hero{padding:44px 0 40px;}
.cat-hero h1{font-size:clamp(26px,2vw,40px);margin:12px 0 10px;}
.cat-hero-sub{font-size:14.5px;}
.cat-hero-meta{margin-top:16px;font-size:12.5px;}
.page-hero{padding:48px 0 6px;}
.page-hero h1{font-size:clamp(26px,2vw,40px);margin:12px 0 10px;}
.page-hero-sub{font-size:15px;}
.lead{font-size:15.5px;line-height:1.85;}
.article-head{padding:44px 0 32px;}
.article-head h1{font-size:clamp(26px,2vw,40px);line-height:1.32;}
.article-sub{font-size:15px;margin-top:12px;}
.article-meta{margin-top:18px;font-size:12.5px;}
.article-lead{margin-top:32px;padding:18px 20px;font-size:14.5px;line-height:1.85;}
.prose{padding:28px 0 8px;font-size:16px;line-height:1.9;}
.prose > * + *{margin-top:18px;}
.prose h2{font-size:22px;margin-top:36px;}
.prose h3{font-size:18px;margin-top:26px;}
.cta-box{margin:32px 0 8px;padding:22px 24px;}
.cta-box h3{font-size:17px;}
.cta-box .cta-go{height:48px;padding:0 24px;font-size:15px;gap:6px;flex:none;}
.cta-box p{font-size:13px;}
.article-foot{margin-top:32px;padding-top:18px;}
.section-related{padding:56px 0;}

/* 搜索 */
.search-big{height:52px;margin-top:20px;}
.search-big input{font-size:15px;}
.search-summary{font-size:13px;margin-top:16px;}
.pager{margin-top:36px;}
.pager-btn{min-width:38px;height:38px;font-size:13.5px;}

/* 大屏：容器只小幅放大，字号不再放大 */
@media (min-width:1400px){ .wrap{max-width:1240px;} }
@media (min-width:1700px){ .wrap{max-width:1320px;} .section{padding:64px 0;} }
@media (min-width:2200px){ .wrap{max-width:1400px;} }
@media (min-width:2400px){
  .wrap{max-width:1440px;}
  .hero-copy h1{font-size:52px;}
  .section-head h2{font-size:32px;}
  .post-body h3{font-size:16.5px;}
  .post-body p{font-size:13px;}
  .cat-card h3{font-size:18px;}
  .prose{font-size:16.5px;}
  .cat-hero h1,.article-head h1,.page-hero h1{font-size:44px;}
  .hero-sub{font-size:16.5px;}
  .nav a{font-size:15px;}
  .post-cover{height:142px;}
}

/* 小屏同步收紧一档（保持层级不变） */

/* Hero 右侧：精选卡 + 最新更新小列表，填满右栏 */
.hero-side{display:flex;flex-direction:column;gap:12px;}
.hero-latest{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 16px 10px;box-shadow:var(--shadow-sm);}
.hero-latest h4{margin:0 0 4px;font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted-2);font-weight:600;}
.hero-latest a{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:8px 0;border-top:1px solid var(--line);}
.hero-latest a:first-of-type{border-top:0;}
.hero-latest b{font-size:13px;font-weight:500;color:var(--ink-soft);line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;}
.hero-latest a:hover b{color:var(--accent);}
.hero-latest span{flex:none;font-size:11.5px;color:var(--muted-2);}


@media (max-width:820px){
  .hero-latest a{padding:11px 0;}
  .hero{padding:44px 0 52px;}
  .section{padding:48px 0;}
  .hero-copy h1{font-size:clamp(28px,7vw,38px);}
  .section-head h2{font-size:clamp(21px,4.6vw,26px);}
  .post-cover{height:120px;}
  .cat-card{min-height:190px;}
}