/* ===== 2.com 科技前沿网 · 深色科技蓝（玻璃拟态 + 青蓝光晕） ===== */
:root{
  --accent:#22d3ee;--accent-2:#3b82f6;
  --grad:linear-gradient(135deg,#22d3ee,#3b82f6);
  --bg:#050b16;--card:rgba(13,25,44,.72);--card-solid:#0d192c;
  --border:rgba(56,189,248,.14);
  --text:#d7e4f5;--strong:#f2f8ff;--muted:#6f86a5;
  --radius:12px;
  --glow:0 0 24px rgba(34,211,238,.12),0 8px 28px rgba(0,0,0,.5);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.8;font-size:16px;
  background-image:radial-gradient(900px 420px at 85% -120px,rgba(34,211,238,.1),transparent),
                   radial-gradient(700px 340px at 5% -80px,rgba(59,130,246,.12),transparent);
  background-attachment:fixed}
a{color:var(--accent);text-decoration:none;transition:color .2s}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
::selection{background:rgba(34,211,238,.3)}

.site-header{background:rgba(5,11,22,.72);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:62px}
.logo{font-size:20px;font-weight:800;letter-spacing:2px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.nav{display:flex;align-items:center}
.nav a{margin-left:8px;padding:7px 15px;border-radius:8px;color:var(--muted);font-size:14.5px;transition:all .2s}
.nav a:hover{color:var(--accent);background:rgba(34,211,238,.08)}
.nav a.active{color:#04121c;background:var(--grad);font-weight:600;box-shadow:0 0 18px rgba(34,211,238,.4)}

.crumb{font-size:13px;color:var(--muted);margin:18px 0}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--accent)}

.intro{background:linear-gradient(150deg,rgba(34,211,238,.1),rgba(13,25,44,.9) 40%),var(--card-solid);
  border:1px solid var(--border);border-radius:var(--radius);padding:40px 36px;margin:18px 0;
  box-shadow:var(--glow);position:relative;overflow:hidden}
.intro::after{content:"";position:absolute;right:-70px;top:-70px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(34,211,238,.18),transparent 70%)}
.intro h1{font-size:28px;font-weight:800;letter-spacing:2px;color:var(--strong);margin-bottom:10px}
.intro h1::after{content:"";display:block;width:64px;height:3px;margin-top:14px;background:var(--grad);border-radius:3px;
  box-shadow:0 0 12px rgba(34,211,238,.6)}
.intro p{color:var(--muted);font-size:14.5px;max-width:660px}

.section-title{font-size:19px;font-weight:700;color:var(--strong);margin:30px 0 16px;display:flex;align-items:center;gap:12px;letter-spacing:1px}
.section-title::before{content:"";width:26px;height:3px;background:var(--grad);border-radius:3px;flex:none;box-shadow:0 0 10px rgba(34,211,238,.5)}
.section-title small{font-size:12.5px;color:var(--muted);font-weight:400}

.list{background:var(--card);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--glow);counter-reset:item}
.list-item{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:16px 22px;
  border-bottom:1px solid var(--border);transition:background .2s}
.list-item:last-child{border-bottom:none}
.list-item:hover{background:rgba(34,211,238,.06)}
.list-item a{color:var(--text);font-size:16px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  display:flex;align-items:center;gap:12px;min-width:0}
.list-item a::before{counter-increment:item;content:counter(item,decimal-leading-zero);flex:none;
  font-family:"SFMono-Regular",Consolas,Menlo,monospace;font-size:13px;font-weight:700;color:var(--accent);min-width:24px}
.list-item a:hover{color:var(--accent)}
.list-item time{flex:none;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}

.pagination{display:flex;justify-content:center;align-items:center;gap:12px;margin:26px 0;font-size:14px}
.pagination a{padding:7px 18px;border-radius:8px;background:var(--card);border:1px solid var(--border);color:var(--text);transition:all .2s}
.pagination a:hover{background:var(--grad);color:#04121c;border-color:transparent}
.pagination span{color:var(--muted)}

.article{background:var(--card);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border:1px solid var(--border);border-radius:var(--radius);padding:36px 34px;margin-bottom:18px;box-shadow:var(--glow)}
.article h1{font-size:26px;line-height:1.5;color:var(--strong);margin-bottom:14px;font-weight:800}
.article .meta{font-size:13px;color:var(--muted);border-bottom:1px solid var(--border);padding-bottom:16px;margin-bottom:24px}
.article .meta span{margin-right:18px}
.article .content p{margin-bottom:16px;color:#b8c9de}
.article .content h2{font-size:19px;color:var(--strong);margin:30px 0 14px;padding-left:14px;position:relative}
.article .content h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;
  background:var(--grad);box-shadow:0 0 10px rgba(34,211,238,.5)}
.article .content ul{padding-left:22px;margin-bottom:16px;color:#b8c9de}

.prevnext{display:flex;justify-content:space-between;gap:14px;font-size:14px;background:var(--card);
  border:1px solid var(--border);border-radius:var(--radius);padding:16px 22px;flex-wrap:wrap;box-shadow:var(--glow)}
.prevnext a{color:var(--muted)}
.prevnext a:hover{color:var(--accent)}

.cols{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.col-card{display:block;background:var(--card);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border:1px solid var(--border);border-radius:var(--radius);padding:26px 20px;text-align:center;
  box-shadow:var(--glow);position:relative;overflow:hidden;transition:transform .25s,border-color .25s}
.col-card::before{content:"";position:absolute;inset:0 0 auto 0;height:2px;background:var(--grad);
  transform:scaleX(0);transform-origin:left;transition:transform .25s}
.col-card h3{font-size:17px;letter-spacing:2px;margin-bottom:8px;color:var(--strong)}
.col-card p{font-size:13px;color:var(--muted)}
.col-card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.4)}
.col-card:hover::before{transform:scaleX(1)}

.site-footer{text-align:center;font-size:13px;color:var(--muted);letter-spacing:2px;padding:34px 16px;margin-top:14px;border-top:1px solid var(--border)}

@media (max-width:640px){
  .site-header .wrap{height:56px}
  .nav a{margin-left:2px;padding:6px 10px;font-size:13.5px}
  .logo{font-size:18px}
  .intro{padding:26px 20px}
  .intro h1{font-size:22px}
  .cols{grid-template-columns:1fr}
  .list-item{padding:14px 16px}
  .list-item a{font-size:15px}
  .article{padding:24px 18px}
  .article h1{font-size:21px}
}


/* ===== 模板变体：导航N2 玻璃胶囊组 + 页脚F2 ===== */
.nav{background:rgba(34,211,238,.06);border:1px solid var(--border);border-radius:999px;padding:4px}
.nav a{margin-left:2px}
.site-footer{border-top:1px solid var(--border);padding:36px 0 0;margin-top:20px;background:rgba(13,25,44,.5)}
.f2-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:24px;padding-bottom:28px}
.f2-brand b{font-size:18px;font-weight:800;letter-spacing:2px;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.f2-brand p{font-size:12.5px;color:var(--muted);margin-top:8px;letter-spacing:.5px}
.f2-nav{display:flex;flex-direction:column;gap:8px}
.f2-nav span{font-size:12px;color:var(--accent);letter-spacing:2px;margin-bottom:4px}
.f2-nav a{color:var(--muted);font-size:13.5px}
.f2-nav a:hover{color:var(--accent)}
.f2-bar{border-top:1px solid var(--border);text-align:center;padding:14px 16px;font-size:12.5px;color:var(--muted);letter-spacing:1px}
.article .content p{overflow-wrap:break-word}
@media (max-width:640px){.f2-grid{grid-template-columns:1fr}}