/* ===== 3.com 数码杂志社 · 极简编辑风（米白杂志排版） ===== */
:root{
  --ink:#161616;--paper:#faf7f2;--card:#ffffff;
  --accent:#b03a2e;
  --border:#e5ded2;--muted:#7c7566;
  --serif:"Noto Serif SC","Songti SC","STSong","SimSun",serif;
  --radius:2px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--serif);background:var(--paper);color:var(--ink);line-height:1.9;font-size:16px}
a{color:var(--accent);text-decoration:none;transition:color .2s}
.wrap{max-width:960px;margin:0 auto;padding:0 24px}
::selection{background:rgba(176,58,46,.18)}

.site-header{background:var(--paper);border-bottom:1px solid var(--ink);position:sticky;top:0;z-index:10}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{font-size:24px;font-weight:900;letter-spacing:6px;color:var(--ink)}
.nav{display:flex;align-items:center}
.nav a{margin-left:4px;padding:6px 14px;color:var(--ink);font-size:15px;letter-spacing:2px;
  border-bottom:2px solid transparent;transition:all .2s}
.nav a:hover{color:var(--accent)}
.nav a.active{color:var(--accent);border-bottom-color:var(--accent)}

.crumb{font-size:12.5px;color:var(--muted);margin:20px 0;letter-spacing:1px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--accent)}

.intro{background:none;border:none;border-top:3px double var(--ink);border-bottom:1px solid var(--border);
  padding:36px 0 30px;margin:10px 0 6px;text-align:center}
.intro h1{font-size:34px;font-weight:900;letter-spacing:10px;margin-bottom:12px}
.intro p{color:var(--muted);font-size:14px;letter-spacing:2px;max-width:640px;margin:0 auto}

.section-title{font-size:20px;font-weight:900;letter-spacing:4px;margin:34px 0 4px;
  padding-bottom:10px;border-bottom:1px solid var(--ink)}
.section-title small{font-size:12px;color:var(--muted);font-weight:400;letter-spacing:1px;margin-left:10px}

.list{background:none;border:none;box-shadow:none;counter-reset:item}
.list-item{display:flex;justify-content:space-between;align-items:baseline;gap:16px;
  padding:16px 4px;border-bottom:1px solid var(--border);transition:background .2s}
.list-item:last-child{border-bottom:none}
.list-item:hover{background:rgba(22,22,22,.03)}
.list-item a{color:var(--ink);font-size:17.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  display:flex;align-items:baseline;gap:14px;min-width:0;letter-spacing:1px}
.list-item a::before{counter-increment:item;content:counter(item,decimal-leading-zero) ".";flex:none;
  font-size:13px;color:var(--accent);font-weight:700;min-width:28px}
.list-item a:hover{color:var(--accent)}
.list-item time{flex:none;font-size:12.5px;color:var(--muted);letter-spacing:1px}

.pagination{display:flex;justify-content:center;align-items:center;gap:16px;margin:30px 0;font-size:14px}
.pagination a{padding:6px 18px;border:1px solid var(--ink);color:var(--ink);letter-spacing:2px;transition:all .2s}
.pagination a:hover{background:var(--ink);color:var(--paper)}
.pagination span{color:var(--muted)}

.article{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:44px 46px;margin-bottom:18px}
.article h1{font-size:28px;line-height:1.55;letter-spacing:2px;margin-bottom:16px;font-weight:900;text-align:center}
.article .meta{font-size:12.5px;color:var(--muted);letter-spacing:2px;text-align:center;
  border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:10px 0;margin-bottom:28px}
.article .meta span{margin:0 10px}
.article .content p{margin-bottom:18px;color:#33302a;letter-spacing:.5px;text-align:justify}
.article .content h2{font-size:20px;letter-spacing:3px;margin:34px 0 16px;font-weight:900;
  padding-bottom:8px;border-bottom:2px solid var(--accent);display:inline-block}
.article .content ul{padding-left:24px;margin-bottom:18px;color:#33302a}

.prevnext{display:flex;justify-content:space-between;gap:14px;font-size:14px;
  border-top:1px solid var(--border);border-bottom:1px solid var(--border);
  padding:16px 4px;flex-wrap:wrap;background:none}
.prevnext a{color:var(--muted);letter-spacing:1px}
.prevnext a:hover{color:var(--accent)}

.cols{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--ink)}
.col-card{display:block;background:var(--card);padding:30px 20px;text-align:center;
  border-right:1px solid var(--ink);transition:background .25s;position:relative}
.col-card:last-child{border-right:none}
.col-card h3{font-size:18px;letter-spacing:4px;margin-bottom:10px;color:var(--ink)}
.col-card p{font-size:12.5px;color:var(--muted);letter-spacing:1px}
.col-card:hover{background:var(--ink)}
.col-card:hover h3{color:var(--paper)}
.col-card:hover p{color:#b7b0a2}

.site-footer{text-align:center;font-size:12.5px;color:var(--muted);letter-spacing:3px;
  padding:36px 16px;margin-top:20px;border-top:1px solid var(--border)}

@media (max-width:640px){
  .site-header .wrap{height:58px}
  .nav a{padding:6px 8px;font-size:13.5px;letter-spacing:0}
  .logo{font-size:19px;letter-spacing:3px}
  .intro{padding:26px 0 22px}
  .intro h1{font-size:24px;letter-spacing:5px}
  .cols{grid-template-columns:1fr}
  .col-card{border-right:none;border-bottom:1px solid var(--ink)}
  .col-card:last-child{border-bottom:none}
  .list-item{padding:14px 2px}
  .list-item a{font-size:15.5px}
  .article{padding:26px 20px}
  .article h1{font-size:22px}
}


/* ===== 模板变体：导航N3 竖线分隔 + 页脚F3 + 首字下沉 ===== */
.nav a{border-radius:0;border-bottom:none;border-left:1px solid var(--ink);margin-left:0;padding:4px 16px}
.nav a:first-child{border-left:none}
.nav a.active{border-bottom:none;text-decoration:underline;text-underline-offset:6px}
.site-footer{border-top:3px double var(--ink);margin-top:30px;padding:34px 16px 30px}
.f3-name{font-size:26px;font-weight:900;letter-spacing:8px;text-align:center;margin-bottom:16px}
.f3-links{display:flex;justify-content:center;gap:24px;flex-wrap:wrap;margin-bottom:14px}
.f3-links a{color:var(--muted);font-size:13.5px;letter-spacing:2px}
.f3-links a:hover{color:var(--accent)}
.f3-copy{text-align:center;font-size:12px;color:var(--muted);letter-spacing:2px}
.article .content>p:first-of-type::first-letter{float:left;font-size:3em;line-height:1;padding:6px 12px 0 0;color:var(--accent);font-weight:900}
@media (max-width:640px){.nav a{padding:4px 8px}}