:root{
  --blue:#0096FA;
  --blue-d:#0072C6;
  --ink:#111827;
  --gray:#6B7280;
  --line:#E5E7EB;
  --tint:#F7F9FB;
  --paper:#FCFCFD;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  color:var(--ink);background:#fff;line-height:1.85;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.3;font-weight:700}
.wrap{width:100%;max-width:1100px;margin:0 auto;padding:0 28px}
.doc{max-width:860px;margin:0 auto}
.serif{font-family:Georgia,"Times New Roman","Songti SC","Noto Serif SC",serif}

/* ============ 顶栏 ============ */
.hd{
  position:sticky;top:0;z-index:90;background:rgba(255,255,255,.97);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.hd-in{display:flex;align-items:center;height:64px;gap:16px}
.hd-brand{display:flex;align-items:center;gap:9px;flex:none}
.hd-brand img{width:30px;height:30px;border-radius:7px}
.hd-brand b{font-family:Georgia,"Times New Roman",serif;font-size:21px;font-weight:700;letter-spacing:-.4px}
.hd-nav{display:flex;gap:26px;margin-left:auto;font-size:12.5px;color:var(--gray)}
.hd-nav a{letter-spacing:.4px}
.hd-nav a:hover{color:var(--blue)}
.hd-cta{
  flex:none;background:var(--blue);color:#fff;font-size:12px;font-weight:600;
  border-radius:2px;padding:8px 16px;letter-spacing:.5px;
}
.hd-cta:hover{background:var(--blue-d)}
.hd-menu{display:none;background:none;border:0;cursor:pointer;color:var(--ink);padding:4px}

/* ============ 英雄区：刊头 ============ */
.hero{padding:64px 0 52px;border-bottom:1px solid var(--line)}
.hero-in{display:grid;grid-template-columns:1.12fr .88fr;gap:54px;align-items:center}
.kick{
  font-size:10.5px;letter-spacing:4px;color:var(--blue);text-transform:uppercase;
  display:block;margin-bottom:18px;
}
.hero h1{
  font-family:Georgia,"Times New Roman","Songti SC",serif;
  font-size:88px;font-weight:700;letter-spacing:-3px;line-height:1;margin-bottom:16px;
}
.hero h1 span{color:var(--blue)}
.hero .lead{
  font-family:Georgia,"Songti SC",serif;font-style:italic;
  font-size:21px;color:#374151;margin-bottom:18px;
}
.hero .desc{font-size:14.5px;color:#4B5563;margin-bottom:28px;max-width:540px}
.acts{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.btn{
  display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:#fff;
  padding:12px 28px;border-radius:2px;font-weight:600;font-size:14px;letter-spacing:.3px;
}
.btn svg{width:16px;height:16px}
.btn:hover{background:var(--blue-d)}
.ghost{
  display:inline-flex;align-items:center;padding:11px 20px;border-radius:2px;
  border:1px solid #D1D5DB;color:var(--gray);font-size:13px;
}
.ghost:hover{border-color:var(--ink);color:var(--ink)}

/* 画框 */
.art{background:#fff;border:1px solid #D9DEE5;padding:18px 18px 14px;box-shadow:0 18px 40px rgba(17,24,39,.07)}
.art img{width:100%;aspect-ratio:4/5;object-fit:cover}
.plate{
  display:flex;justify-content:space-between;align-items:baseline;gap:12px;
  border-top:1px solid var(--line);margin-top:14px;padding-top:9px;
}
.plate b{font-family:Georgia,"Songti SC",serif;font-size:13.5px;font-weight:700}
.plate span{font-size:10px;letter-spacing:1.6px;color:var(--gray);text-transform:uppercase}

/* ============ 细分隔标签行 ============ */
.tagsline{border-bottom:1px solid var(--line);background:var(--paper)}
.tags-in{display:flex;flex-wrap:wrap;justify-content:space-between;gap:0}
.tags-in span{
  flex:1;min-width:120px;text-align:center;padding:13px 8px;
  font-size:10.5px;letter-spacing:2.6px;color:var(--gray);text-transform:uppercase;
  border-left:1px solid var(--line);
}
.tags-in span:first-child{border-left:0}

/* ============ 通用区块 ============ */
.sec{padding:66px 0}
.sec-tint{background:var(--tint);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-h{border-top:1.5px solid var(--ink);padding-top:16px;margin-bottom:30px}
.sec-h .tag{
  display:block;font-size:10px;letter-spacing:3.6px;color:var(--blue);
  text-transform:uppercase;margin-bottom:7px;
}
.sec-h h2{
  font-family:Georgia,"Songti SC","Noto Serif SC",serif;
  font-size:29px;margin-bottom:7px;letter-spacing:-.3px;
}
.sec-h p{font-size:14.5px;color:var(--gray)}

/* ============ 入口：画廊标签卡 ============ */
.placards{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.placard{border-left:1px solid var(--line);padding:2px 22px 6px}
.placard:first-child{border-left:0;padding-left:0}
.idx{
  display:block;font-family:Georgia,serif;font-size:48px;line-height:1;color:#E7EDF4;
  font-weight:700;margin-bottom:10px;
}
.placard h4{font-size:16px;margin-bottom:5px}
.placard p{font-size:13.4px;color:#4B5563}
.placard code{
  font-family:"SFMono-Regular",Consolas,monospace;font-size:12.5px;
  color:var(--blue-d);border-bottom:1px solid #BFE2FF;
}
.enote{
  margin-top:30px;border-top:1px solid var(--line);padding-top:14px;
  font-size:12.8px;color:var(--gray);
}

/* ============ 特色：双栏编目 ============ */
.editorial{display:grid;grid-template-columns:1fr 1fr;gap:0 46px}
.fe{
  display:grid;grid-template-columns:52px 1fr;gap:14px;
  border-top:1px solid var(--line);padding:17px 0;
}
.rn{
  font-family:Georgia,serif;font-style:italic;font-size:19px;color:var(--blue);
  line-height:1.5;
}
.fe h4{font-size:16px;margin-bottom:3px}
.fe p{font-size:13.6px;color:#4B5563}

/* ============ 界面：沙龙式挂画 ============ */
.salon{display:flex;align-items:flex-start;gap:24px}
.salon figure{flex:1;min-width:0}
.salon figure:nth-child(2){margin-top:46px}
.salon figure:nth-child(3){margin-top:18px}
.salon img{width:100%;aspect-ratio:3/4;object-fit:cover;border:1px solid #D9DEE5;padding:8px;background:#fff}
.salon figcaption{padding-top:10px;border-top:1px solid var(--line);margin-top:10px}
.salon figcaption b{display:block;font-family:Georgia,"Songti SC",serif;font-size:13.5px}
.salon figcaption p{font-size:12.3px;color:var(--gray)}
.note-line{
  margin-top:30px;border-left:2px solid var(--blue);padding:4px 0 4px 18px;
  display:grid;grid-template-columns:190px 1fr;gap:22px;align-items:start;
}
.note-line h4{font-size:14px;letter-spacing:.4px}
.note-line h4 span{display:block;font-size:10px;letter-spacing:2.4px;color:var(--blue);margin-top:3px;font-weight:600}
.note-line ol{list-style:none;display:grid;gap:6px}
.note-line li{font-size:13.2px;color:#4B5563;position:relative;padding-left:18px}
.note-line li::before{
  content:"—";position:absolute;left:0;color:var(--blue);
}

/* ============ 使用指南 ============ */
.guide-ol{
  list-style:none;display:grid;gap:10px;margin-top:26px;
  border-left:2px solid var(--blue);padding:4px 0 4px 18px;
}
.guide-ol li{font-size:13.6px;color:#4B5563;position:relative;padding-left:20px}
.guide-ol li::before{content:"—";position:absolute;left:0;color:var(--blue)}

/* ============ FAQ：脚注 ============ */
.footnotes{columns:2;column-gap:46px}
.fq{
  break-inside:avoid;border-top:1px solid var(--line);padding:14px 0 16px;
}
.fq h3{font-size:15px;margin-bottom:4px;display:flex;gap:7px;align-items:baseline}
.fq h3 .sup{
  font-family:Georgia,serif;font-size:11.5px;color:var(--blue);flex:none;
}
.fq p{font-size:13.2px;color:#4B5563}

/* ============ 评价：三联引文 ============ */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.quote{border-top:2px solid var(--ink);padding-top:14px}
.quote::before{
  content:"“";font-family:Georgia,serif;font-size:38px;line-height:.6;color:#C9D3DE;
  display:block;margin-bottom:8px;
}
.quote blockquote{
  font-family:Georgia,"Songti SC",serif;font-size:14px;color:#374151;line-height:1.85;
}
.by{
  margin-top:12px;font-size:10.5px;letter-spacing:1.8px;text-transform:uppercase;color:var(--gray);
}
.by time{letter-spacing:0;text-transform:none;font-family:"SFMono-Regular",Consolas,monospace}

/* ============ 下载：版权页 ============ */
.dlsec{padding:66px 0}
.colophon{
  border:1px solid var(--ink);display:grid;grid-template-columns:1fr 306px;
}
.colo-main{padding:38px 40px}
.dlogo{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.dlogo img{width:46px;height:46px;border-radius:9px}
.dlogo em{
  font-style:normal;font-size:10px;letter-spacing:3px;color:var(--gray);text-transform:uppercase;
}
.colo-main h2{
  font-family:Georgia,"Songti SC",serif;font-size:28px;margin-bottom:9px;
}
.colo-main h2 em{font-style:normal;color:var(--blue)}
.colo-main p{font-size:13.4px;color:#4B5563;max-width:520px}
.dm{display:flex;gap:16px;flex-wrap:wrap;margin-top:16px}
.dm span{font-size:11px;letter-spacing:1.4px;color:var(--gray);text-transform:uppercase}
.colo-side{border-left:1px solid var(--ink);padding:30px 28px;background:var(--tint);display:flex;flex-direction:column;justify-content:center}
.kv{display:flex;justify-content:space-between;font-size:12px;padding:7px 0;border-bottom:1px solid var(--line)}
.kv b{font-weight:600}
.colo-side .btn{justify-content:center;margin-top:18px;width:100%}
.colo-side small{display:block;margin-top:9px;font-size:10.5px;color:var(--gray);text-align:center}

/* ============ 页脚 ============ */
.ft{border-top:2px solid var(--ink);padding:34px 0 30px;font-size:12px;color:var(--gray)}
.ft-in{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:start}
.ft-brand{display:flex;align-items:center;gap:9px;color:var(--ink);margin-bottom:8px}
.ft-brand img{width:24px;height:24px;border-radius:6px}
.ft-brand strong{font-family:Georgia,serif;font-size:16px}
.ft p{max-width:560px;line-height:1.95}
.ft-links{display:flex;gap:18px;flex-direction:column;text-align:right;font-size:11.5px}
.ft-links a:hover{color:var(--blue)}
.ft-copy{margin-top:22px;padding-top:14px;border-top:1px solid var(--line);font-size:11px;color:#9CA3AF;grid-column:1/-1}

/* ============ 返回顶部 ============ */
.backtop{
  position:fixed;right:24px;bottom:88px;z-index:70;width:40px;height:40px;
  border-radius:50%;background:#fff;border:1px solid var(--line);color:var(--ink);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:0 8px 18px rgba(17,24,39,.12);
}
.backtop:hover{background:var(--ink);color:#fff;border-color:var(--ink)}

/* ============ 响应式 ============ */
@media (max-width:940px){
  .hero-in{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:72px}
  .art{max-width:460px}
  .placards{grid-template-columns:1fr 1fr;gap:26px 22px}
  .placard:nth-child(3){border-left:0;padding-left:0}
  .editorial{grid-template-columns:1fr}
  .note-line{grid-template-columns:1fr;gap:10px}
  .quotes{grid-template-columns:1fr 1fr}
  .colophon{grid-template-columns:1fr}
  .colo-side{border-left:0;border-top:1px solid var(--ink)}
  .ft-in{grid-template-columns:1fr}
  .ft-links{flex-direction:row;text-align:left;flex-wrap:wrap}
}
@media (max-width:720px){
  .hd-nav{
    display:none;position:absolute;top:64px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--line);
    padding:10px 22px;flex-direction:column;gap:0;margin-left:0;
  }
  .hd-nav.open{display:flex}
  .hd-nav a{padding:9px 0}
  .hd-menu{display:block;margin-left:auto}
  .hero{padding:38px 0 38px}
  .hero h1{font-size:56px;letter-spacing:-2px}
  .hero .lead{font-size:18px}
  .tags-in span{flex:0 0 50%;border-top:1px solid var(--line)}
  .tags-in span:nth-child(-n+2){border-top:0}
  .sec{padding:44px 0}
  .sec-h h2{font-size:23px}
  .placards{grid-template-columns:1fr}
  .placard{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:16px}
  .placard:first-child{border-top:0}
  .salon{display:flex;overflow-x:auto;gap:14px;scroll-snap-type:x mandatory}
  .salon figure{flex:0 0 78%;margin-top:0!important;scroll-snap-align:start}
  .footnotes{columns:1}
  .quotes{grid-template-columns:1fr}
  .colo-main{padding:28px 22px}
  .colo-side{padding:24px 22px}
  .backtop{right:16px;bottom:76px}
}