:root{
  --ink:#191722;
  --ink-2:#221E2E;
  --verm:#B23A2E;
  --verm-d:#8C2A20;
  --verm-l:#F2E1D8;
  --gold:#B08A4C;
  --gold-l:#D9B981;
  --paper:#F5EFE2;
  --paper-2:#FCF9F2;
  --rule:#E1D5BE;
  --muted:#6E6457;
  --serif:"Songti SC","Noto Serif SC","Source Han Serif SC",STSong,SimSun,Georgia,serif;
}
*{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:1.35;font-weight:700}
.wrap{width:100%;max-width:1100px;margin:0 auto;padding:0 26px}

/* ============ 顶栏：纸色 + 朱砂 ============ */
.top{
  position:sticky;top:0;z-index:90;background:rgba(252,249,242,.96);
  border-bottom:1px solid var(--rule);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.top.on{box-shadow:0 8px 24px rgba(25,23,34,.07)}
.top-in{display:flex;align-items:center;height:70px;gap:18px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand img{width:36px;height:36px;border:1px solid var(--rule);border-radius:2px}
.brand-t b{display:block;font-family:var(--serif);font-size:18px;letter-spacing:2px;line-height:1.2}
.brand-t small{display:block;font-size:10px;letter-spacing:1.4px;color:var(--muted);margin-top:3px}
.nav{display:flex;gap:24px;margin-left:auto;font-size:13px;font-weight:600;color:#584F44}
.nav a{position:relative;padding:4px 0}
.nav a::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--verm);
  transition:right .25s ease;
}
.nav a:hover{color:var(--verm-d)}
.nav a:hover::after{right:0}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;color:var(--ink);padding:4px}
.cta{
  flex:none;background:var(--verm);color:#fff;font-size:12.5px;font-weight:800;letter-spacing:.6px;
  padding:10px 20px;border-radius:2px;box-shadow:0 3px 0 var(--verm-d);
}
.cta:hover{background:var(--verm-d)}

/* ============ 英雄区：墨底册页 ============ */
.hero{
  position:relative;overflow:hidden;padding:62px 0 58px;color:var(--paper);
  background:
    radial-gradient(620px 460px at 86% 4%,rgba(178,58,46,.34),transparent 72%),
    repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 96px),
    linear-gradient(180deg,#1E1A29 0%,#151220 100%);
}
.hero::after{
  content:"册";position:absolute;right:-46px;bottom:-146px;font-family:var(--serif);
  font-size:420px;line-height:1;color:rgba(245,239,226,.035);pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:1.04fr .96fr;gap:46px;align-items:center;position:relative;z-index:1}
.kick{
  display:inline-flex;align-items:center;gap:9px;font-size:11px;letter-spacing:3px;
  color:var(--gold-l);margin-bottom:16px;
}
.kick::before{content:"";width:7px;height:7px;background:var(--verm);transform:rotate(45deg)}
.hero h1{
  font-family:var(--serif);font-size:62px;letter-spacing:6px;line-height:1.12;
  margin-bottom:14px;color:#FBF6EA;font-weight:700;
}
.hero h1 span{color:var(--gold-l)}
.hero .lead{font-size:18.5px;font-weight:700;color:#F1E7D3;margin-bottom:13px}
.hero .desc{font-size:14.6px;color:rgba(245,239,226,.74);max-width:540px;margin-bottom:26px;line-height:2}
.acts{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.btn{
  display:inline-flex;align-items:center;gap:8px;background:var(--verm);color:#fff;
  padding:13px 28px;border-radius:2px;font-weight:800;font-size:15px;
  box-shadow:0 4px 0 var(--verm-d),0 12px 26px rgba(0,0,0,.3);
}
.btn svg{width:17px;height:17px}
.btn:hover{background:var(--verm-d);transform:translateY(1px)}
.ghost{
  display:inline-flex;align-items:center;padding:12px 20px;border-radius:2px;
  border:1px solid rgba(217,185,129,.48);color:var(--gold-l);font-size:13.5px;font-weight:700;
}
.ghost:hover{background:rgba(217,185,129,.1);border-color:var(--gold-l)}
.facts{
  display:flex;flex-wrap:wrap;gap:0;margin-top:30px;padding-top:16px;
  border-top:1px solid rgba(245,239,226,.16);
}
.facts div{padding:0 20px;border-left:1px solid rgba(245,239,226,.14)}
.facts div:first-child{padding-left:0;border-left:0}
.facts b{display:block;font-size:12.5px;color:#F1E7D3;letter-spacing:.6px}
.facts span{display:block;font-size:11px;color:rgba(245,239,226,.52);margin-top:2px}

/* 册页叠放 */
.album{position:relative;height:476px;z-index:1}
.spine{
  position:absolute;right:0;top:6%;writing-mode:vertical-rl;letter-spacing:6px;
  font-size:10.5px;color:rgba(217,185,129,.6);border-left:1px solid rgba(217,185,129,.26);
  padding-left:10px;
}
.pg{
  position:absolute;background:#F8F2E4;padding:8px;margin:0;
  box-shadow:0 20px 44px rgba(0,0,0,.46),0 0 0 1px rgba(217,185,129,.35);
}
.pg img{width:100%;height:100%;object-fit:cover}
.p1{left:0;top:7%;width:54%;height:66%;transform:rotate(-3.2deg);z-index:2}
.p2{left:26%;top:0;width:50%;height:64%;transform:rotate(2.6deg);z-index:3}
.p3{right:3%;bottom:3%;width:46%;height:58%;transform:rotate(-1.6deg);z-index:4}
.seal{
  position:absolute;left:-8px;bottom:9%;width:62px;height:62px;background:var(--verm);
  color:#fff;font-family:var(--serif);font-size:29px;display:grid;place-items:center;
  transform:rotate(-8deg);z-index:6;box-shadow:inset 0 0 0 3px rgba(255,255,255,.26);
}

/* ============ 通用区块 ============ */
.sec{padding:66px 0;background:#fff}
.band{background:var(--paper);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.hd2{display:grid;grid-template-columns:66px 1fr;gap:18px;align-items:start;margin-bottom:32px}
.hd2 .no{
  font-family:"SFMono-Regular",Consolas,monospace;font-size:11px;letter-spacing:1px;
  color:var(--verm);border-top:2px solid var(--verm);padding-top:9px;white-space:nowrap;
}
.hd2 h2{font-family:var(--serif);font-size:31px;letter-spacing:2px;margin-bottom:7px}
.hd2 p{font-size:14.4px;color:var(--muted);max-width:800px}

/* 特色：三列册签 */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{
  position:relative;background:var(--paper-2);border:1px solid var(--rule);
  padding:20px 20px 24px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card .n{
  display:inline-block;font-family:"SFMono-Regular",Consolas,monospace;font-size:11px;
  color:var(--verm);letter-spacing:1.6px;padding-bottom:7px;border-bottom:1px solid rgba(178,58,46,.3);
}
.card h4{font-family:var(--serif);font-size:17.5px;letter-spacing:1px;margin:11px 0 7px}
.card p{font-size:13.4px;color:#5C5347;line-height:1.9}
.card:hover{transform:translateY(-3px);border-color:#CBAE8C;box-shadow:0 14px 30px rgba(25,23,34,.08)}

/* 界面：一大幅 + 目录式三行 */
.spread{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:start}
.spread figure{margin:0;background:var(--paper-2);border:1px solid var(--rule)}
.big{padding:10px}
.big img{width:100%;aspect-ratio:3/4;object-fit:cover}
.big figcaption{font-size:12.5px;color:var(--muted);padding:10px 4px 2px;letter-spacing:.6px}
.strip{display:grid;gap:14px}
.strip figure{display:grid;grid-template-columns:88px 1fr;gap:14px;align-items:center;padding:10px}
.strip img{width:88px;height:118px;object-fit:cover;border:1px solid rgba(225,213,190,.9)}
.strip figcaption{font-size:13.2px;color:#5C5347;letter-spacing:.4px}

/* 指南：五步竖轴 */
.steps{list-style:none;position:relative;margin-top:4px;padding-left:0;max-width:880px}
.steps::before{
  content:"";position:absolute;left:19px;top:10px;bottom:17px;width:2px;
  background:linear-gradient(180deg,var(--verm),rgba(178,58,46,.12));
}
.steps li{position:relative;padding:0 0 22px 58px;font-size:14.2px;color:#4E4539;line-height:1.9}
.steps li:last-child{padding-bottom:4px}
.steps b{
  position:absolute;left:0;top:-1px;width:40px;height:40px;border-radius:50%;
  background:var(--paper-2);border:1px solid var(--verm);color:var(--verm);
  display:grid;place-items:center;font-family:"SFMono-Regular",Consolas,monospace;
  font-size:12px;font-weight:800;
}
.gnote{
  margin-top:16px;max-width:880px;border-left:3px solid var(--gold);
  background:rgba(176,138,76,.1);padding:12px 16px;font-size:13px;color:#655B4C;
}

/* 答疑：单列条目 */
.qa{border-bottom:1px solid var(--rule)}
.qa-item{
  display:grid;grid-template-columns:58px 1fr;gap:16px;align-items:start;
  padding:20px 0;border-top:1px solid var(--rule);
}
.qa-item .qn{
  font-family:var(--serif);font-size:13px;color:var(--verm);letter-spacing:1.4px;
  padding-top:4px;
}
.qa-item h3{font-family:var(--serif);font-size:16.5px;letter-spacing:.8px;margin-bottom:7px}
.qa-item p{font-size:13.8px;color:#5C5347;line-height:1.9}

/* 评价：书签卡 */
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rev-card{
  position:relative;background:var(--paper-2);border:1px solid var(--rule);
  border-top:3px solid var(--verm);padding:24px 20px 16px;
}
.rev-card::before{
  content:"\201C";position:absolute;top:2px;right:12px;font-family:Georgia,serif;
  font-size:62px;line-height:1;color:rgba(178,58,46,.12);
}
.rev-card:nth-child(2){margin-top:14px}
.rev-card blockquote{position:relative;z-index:1;font-size:13.4px;color:#4E4539;line-height:1.95}
.rev-card .who{
  display:flex;align-items:center;gap:8px;margin-top:14px;padding-top:10px;
  border-top:1px dashed var(--rule);font-size:10.8px;color:var(--muted);
}
.rev-card .who i{
  width:23px;height:23px;border-radius:50%;background:var(--verm-l);color:var(--verm-d);
  font-style:normal;font-size:10.5px;font-weight:800;display:grid;place-items:center;
}
.rev-card .who time{font-family:"SFMono-Regular",Consolas,monospace;letter-spacing:0}

/* ============ 下载：墨底印章 ============ */
.get{
  position:relative;overflow:hidden;padding:64px 0 66px;color:var(--paper);
  background:radial-gradient(520px 340px at 50% 0%,rgba(178,58,46,.28),transparent 74%),var(--ink);
  text-align:center;
}
.get::before{
  content:"";position:absolute;left:50%;top:16px;width:430px;height:430px;margin-left:-215px;
  border:1px dashed rgba(217,185,129,.24);border-radius:50%;
}
.get-in{position:relative;z-index:1}
.dlogo{display:flex;align-items:center;justify-content:center;gap:11px;margin-bottom:14px}
.dlogo img{width:46px;height:46px;border-radius:2px;border:1px solid rgba(217,185,129,.4)}
.dlogo em{font-style:normal;font-size:10px;letter-spacing:3px;color:rgba(217,185,129,.66)}
.get h2{
  font-family:var(--serif);font-size:34px;letter-spacing:3px;margin-bottom:11px;color:#FBF6EA;
}
.get h2 em{font-style:normal;color:var(--gold-l)}
.get p{
  font-size:13.9px;color:rgba(245,239,226,.72);max-width:640px;margin:0 auto 20px;line-height:1.95;
}
.dm{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:24px}
.dm span{
  font-size:11px;border:1px solid rgba(245,239,226,.26);border-radius:999px;
  padding:3px 12px;color:rgba(245,239,226,.8);
}
.get .btn{box-shadow:0 4px 0 var(--verm-d),0 12px 26px rgba(0,0,0,.4)}

/* ============ 页脚 ============ */
.ft{background:#14121B;color:rgba(245,239,226,.6);padding:34px 0 26px;font-size:12.2px;border-top:3px solid var(--verm)}
.ft-in{display:flex;flex-wrap:wrap;gap:10px 26px;align-items:flex-start;justify-content:space-between}
.ft-brand{display:flex;align-items:center;gap:9px;color:#F1E7D3;font-weight:700;font-size:13.5px;font-family:var(--serif);letter-spacing:1.4px}
.ft-brand img{width:26px;height:26px;border:1px solid rgba(217,185,129,.3);border-radius:2px}
.ft p{max-width:520px;line-height:1.9;color:rgba(245,239,226,.58)}
.ft-links{display:flex;gap:16px;flex-wrap:wrap;font-size:11.8px}
.ft-links a:hover{color:var(--gold-l)}
.ft-copy{width:100%;border-top:1px solid rgba(245,239,226,.14);padding-top:13px;font-size:11px;color:rgba(245,239,226,.42);line-height:1.9}

/* ============ 返回顶部 ============ */
.backtop{
  position:fixed;right:24px;bottom:88px;z-index:70;width:42px;height:42px;border-radius:50%;
  background:var(--paper-2);border:1px solid rgba(25,23,34,.22);color:var(--ink);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:0 6px 16px rgba(25,23,34,.14);
  opacity:0;visibility:hidden;transition:opacity .2s ease;
}
.backtop.on{opacity:1;visibility:visible}
.backtop:hover{background:var(--verm);color:#fff;border-color:var(--verm)}

/* ============ 响应式 960 ============ */
@media (max-width:960px){
  .nav{
    display:none;position:absolute;top:70px;left:0;right:0;margin-left:0;
    background:var(--paper-2);border-bottom:1px solid var(--rule);
    flex-direction:column;gap:0;padding:6px 26px 12px;
  }
  .nav.open{display:flex}
  .nav a{padding:10px 0;border-bottom:1px solid rgba(225,213,190,.7)}
  .nav a::after{display:none}
  .nav-toggle{display:block;margin-left:auto}
  .cta{padding:9px 14px;font-size:11.5px}
  .hero{padding:46px 0 48px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:52px}
  .hero .desc{max-width:none}
  .album{max-width:460px;width:100%;height:430px;margin:0 auto}
  .feat-grid{grid-template-columns:1fr 1fr}
  .spread{grid-template-columns:1fr}
  .strip{grid-template-columns:repeat(3,1fr)}
  .strip figure{display:block;padding:9px}
  .strip img{width:100%;height:auto;aspect-ratio:3/4}
  .strip figcaption{display:block;padding-top:8px;font-size:12.4px}
  .rev-grid{grid-template-columns:1fr 1fr}
  .rev-card:nth-child(2){margin-top:0}
  .rev-card:nth-child(3){grid-column:1 / -1}
}

/* ============ 响应式 600 ============ */
@media (max-width:600px){
  body{font-size:15px}
  .wrap{padding:0 18px}
  .top-in{height:62px;gap:10px}
  .brand img{width:32px;height:32px}
  .brand-t b{font-size:16px;letter-spacing:1.4px}
  .brand-t small{font-size:9px;letter-spacing:1px}
  .nav{top:62px;padding:4px 18px 10px}
  .cta{padding:8px 11px;font-size:10.8px}
  .hero{padding:34px 0 38px}
  .hero h1{font-size:40px;letter-spacing:4px}
  .hero .lead{font-size:16.5px}
  .hero .desc{font-size:13.8px}
  .hero::after{font-size:280px;bottom:-96px;right:-30px}
  .facts div{padding:0 12px}
  .facts b{font-size:11.5px}
  .facts span{font-size:10px}
  .album{height:352px;max-width:340px}
  .seal{width:50px;height:50px;font-size:23px;left:-4px}
  .spine{display:none}
  .sec{padding:42px 0}
  .hd2{grid-template-columns:1fr;gap:8px;margin-bottom:22px}
  .hd2 .no{display:inline-block;border-top:0;border-left:2px solid var(--verm);padding:0 0 0 8px}
  .hd2 h2{font-size:24px;letter-spacing:1.2px}
  .hd2 p{font-size:13.4px}
  .feat-grid{grid-template-columns:1fr}
  .card{padding:18px 16px 20px}
  .strip{grid-template-columns:1fr}
  .strip figure{grid-template-columns:78px 1fr;display:grid;padding:9px}
  .strip img{width:78px;height:104px}
  .steps li{padding-left:50px;font-size:13.6px}
  .steps::before{left:16px}
  .steps b{width:34px;height:34px;font-size:11px}
  .qa-item{grid-template-columns:40px 1fr;gap:10px}
  .qa-item h3{font-size:15.5px}
  .rev-grid{grid-template-columns:1fr}
  .rev-card:nth-child(3){grid-column:auto}
  .get{padding:44px 0 48px}
  .get::before{width:300px;height:300px;margin-left:-150px}
  .get h2{font-size:25px;letter-spacing:2px}
  .dm span{font-size:10.4px;padding:2px 10px}
  .ft-in{flex-direction:column}
  .backtop{right:14px;bottom:74px;width:38px;height:38px}
}