:root{
  --ink:#161616;
  --paper:#f7f4ee;
  --mute:#6a665e;
  --line:#d8d2c6;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--paper);
  color:var(--ink);
  line-height:1.65;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
nav{
  position:sticky;top:0;z-index:10;
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 8vw;
  background:var(--paper);
  border-bottom:1px solid var(--ink);
}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.2em;font-size:13px}
.logo span{
  writing-mode:vertical-rl;
  letter-spacing:.4em;font-size:11px;border:1px solid var(--ink);
  padding:6px 3px;
}
.menu{display:flex;gap:24px;font-size:14px}
.menu a:hover{opacity:.55}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:40px;padding:0 18px;
  border:1px solid var(--ink);background:transparent;
  letter-spacing:.18em;font-size:13px;
}
.btn:hover{background:var(--ink);color:var(--paper)}
.poster{
  position:relative;
  padding:72px 8vw 64px;
  border-bottom:1px solid var(--ink);
  overflow:hidden;
}
.poster.compact{padding:56px 8vw 32px}
.en{
  font-family:"Times New Roman",Georgia,serif;
  font-size:clamp(42px,8vw,96px);
  letter-spacing:.08em;line-height:.9;
  font-weight:400;margin-bottom:18px;
}
.side{
  position:absolute;right:8vw;top:80px;
  writing-mode:vertical-rl;
  letter-spacing:.55em;font-size:13px;
  border-left:1px solid var(--ink);padding-left:10px;
}
.dots{
  font-size:clamp(22px,3.2vw,36px);
  font-weight:700;letter-spacing:.08em;
  margin:8px 0 22px;max-width:18em;
}
h1{font-size:clamp(20px,2.6vw,28px);font-weight:700;max-width:16ch}
.sub{margin-top:10px;max-width:40ch}
.line{margin:14px 0 26px;color:var(--mute)}
.poster img,.split img,.docs img{
  margin-top:36px;width:100%;height:260px;object-fit:cover;
  filter:grayscale(.45) contrast(1.05);
  border-top:1px solid var(--ink);
}
section{padding:64px 8vw;border-bottom:1px solid var(--line)}
section>p{margin:8px 0 28px;color:var(--mute);max-width:54ch}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.cards article{padding:22px 20px 26px;border-right:1px solid var(--line);border-top:1px solid var(--line)}
.cards article:nth-child(3n){border-right:0}
.cards h3{font-size:16px;margin-bottom:8px;letter-spacing:.12em}
.cards p{color:var(--mute);font-size:14px}
.cards b{display:block;margin-top:14px}
.cards small{color:var(--mute)}
.three article{border-right:1px solid var(--line)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split img{margin:0;height:320px;border:1px solid var(--ink)}
.split ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:0;margin:20px 0 24px}
.split li{padding:10px 0;border-bottom:1px solid var(--line);letter-spacing:.12em}
details{border-bottom:1px solid var(--ink);padding:14px 0}
summary{cursor:pointer;font-weight:700;letter-spacing:.08em}
details p{margin-top:8px;max-width:70ch}
.ghost{display:inline-block;margin-top:14px;border-bottom:1px solid var(--ink);letter-spacing:.12em;font-size:13px}
.help{display:grid;grid-template-columns:180px 1fr;gap:40px;border-bottom:0}
.help aside{display:flex;flex-direction:column;gap:12px;position:sticky;top:72px;align-self:start}
.help aside a{letter-spacing:.16em;font-size:13px;color:var(--mute)}
.help aside a:hover{color:var(--ink)}
.docs article{margin-bottom:40px}
.docs img{max-width:460px;height:220px;margin:16px 0;border:1px solid var(--ink)}
.policy{margin-top:14px;padding:16px 0;border-top:1px solid var(--line)}
footer{padding:40px 8vw 24px}
.cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:20px}
.cols h4{letter-spacing:.2em;font-size:12px;margin-bottom:10px}
.cols a,.cols p{display:block;margin:6px 0;color:var(--mute);font-size:13px}
.copy{margin-top:24px;font-size:12px;color:var(--mute);border-top:1px solid var(--ink);padding-top:14px;letter-spacing:.12em}
@media (max-width:980px){
  .menu{display:none}
  .side{position:relative;right:auto;top:auto;writing-mode:horizontal-tb;border:0;padding:0;margin-bottom:12px}
  .cards,.three,.split,.help,.cols{grid-template-columns:1fr}
  .cards article{border-right:0}
}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}