:root{
  --paper:#F5F2EC;
  --ink:#111111;
  --rose:#C9A7A0;
  --line:rgba(17,17,17,.16);
  --quiet:rgba(17,17,17,.62);
  --display:"Playfair Display","Songti SC","SimSun",Georgia,serif;
  --serif:"Source Serif 4","Songti SC","SimSun",Georgia,serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--serif);
  font-size:17px;
  line-height:1.75;
  overflow-x:hidden;
}
a{color:inherit}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{font-family:var(--display);font-weight:900;line-height:1.12;margin:0}
hr{border:0;border-top:1px solid var(--line);margin:1rem 0}
:focus-visible{outline:2px solid var(--rose);outline-offset:3px}

.grain{
  position:fixed;inset:0;z-index:80;pointer-events:none;opacity:.55;
  background-image:repeating-linear-gradient(0deg,rgba(17,17,17,.035) 0 1px,transparent 1px 3px);
}

/* 顶部：品牌居中，菜单分列，工具右置 */
.bar{
  position:sticky;top:0;z-index:60;
  background:rgba(245,242,236,.88);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid var(--line);
}
.rail{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:.4rem;
  max-width:80rem;margin:0 auto;padding:.4rem .9rem;
}
.railList{display:flex;gap:.05rem;list-style:none;margin:0;padding:0}
.railList a{
  position:relative;display:block;padding:.62rem .52rem;font-size:1rem;
  line-height:1.4;text-decoration:none;white-space:nowrap;
}
.railList a::after{
  content:"";position:absolute;left:.52rem;right:.52rem;bottom:.3rem;height:1px;
  background:var(--rose);transform:scaleX(0);transform-origin:left;
  transition:transform .3s ease;
}
.railList a:hover::after,.railList a:focus-visible::after{transform:scaleX(1)}
.mark{
  justify-self:center;padding:.55rem .4rem;font-family:var(--display);
  font-weight:700;font-size:1.15rem;letter-spacing:.05em;text-decoration:none;white-space:nowrap;
}
.railEnd{justify-self:end;display:flex;align-items:center;gap:.45rem}
.find{margin:0}
.findInput{
  width:8.5rem;min-height:44px;padding:.45rem .6rem;font:inherit;font-size:1rem;
  border:1px solid var(--line);border-radius:0;background:rgba(245,242,236,.5);color:inherit;
}
.findInput::placeholder{color:var(--quiet)}
.burger{
  min-height:44px;padding:.55rem .8rem;font:inherit;font-size:1rem;line-height:1.4;
  color:inherit;background:rgba(201,167,160,.24);border:1px solid var(--line);
  border-radius:0;cursor:pointer;
}
.burger:hover{background:rgba(201,167,160,.5)}

.dots{border-top:1px solid var(--line);overflow-x:auto;scrollbar-width:none}
.dots::-webkit-scrollbar{display:none}
.dots ol{display:flex;max-width:80rem;margin:0 auto;padding:0 .5rem;list-style:none}
.dots a{
  display:block;padding:.6rem .7rem;font-size:1rem;line-height:1.4;
  white-space:nowrap;text-decoration:none;color:var(--quiet);
}
.dots a:hover{color:var(--ink)}

/* 全屏遮罩菜单 */
.sheet{
  position:fixed;inset:0;z-index:70;background:var(--ink);color:var(--paper);
  opacity:0;visibility:hidden;transition:opacity .35s ease,visibility .35s ease;
}
.sheet.on{opacity:1;visibility:visible}
.sheetIn{height:100%;overflow:auto;padding:2rem 1.2rem 3rem;display:flex;flex-direction:column;gap:1.4rem}
.sheetLead{margin:0;font-family:var(--mono);font-size:1rem;letter-spacing:.18em;color:var(--rose)}
.sheetNav{list-style:none;margin:0;padding:0;display:grid;gap:.1rem}
.sheetNav a{
  display:block;padding:.6rem 0;min-height:48px;text-decoration:none;
  font-family:var(--display);font-weight:700;font-size:clamp(1.5rem,6vw,2.4rem);
  border-bottom:1px solid rgba(245,242,236,.18);
}
.sheetNav a:hover{color:var(--rose)}
.sheetClose{
  align-self:flex-start;min-height:44px;padding:.6rem 1.1rem;font:inherit;font-size:1rem;
  color:inherit;background:transparent;border:1px solid rgba(245,242,236,.45);
  border-radius:0;cursor:pointer;
}
.sheetClose:hover{border-color:var(--rose);color:var(--rose)}

.wrap{max-width:72rem;margin:0 auto;padding:0 1.1rem}

/* 首屏：分层视差 */
.stage{
  position:relative;display:flex;align-items:flex-end;justify-content:flex-end;
  min-height:70vh;margin:0 -1.1rem;padding:2.5rem 1.1rem 2rem;overflow:hidden;
  border-bottom:1px solid var(--line);
}
.ghost{
  position:absolute;left:-.05em;top:1.4rem;margin:0;z-index:0;
  font-family:var(--display);font-weight:900;line-height:.86;letter-spacing:-.03em;
  font-size:clamp(3rem,12vw,9rem);color:rgba(201,167,160,.36);white-space:nowrap;
  will-change:transform;transform:translate3d(0,calc(var(--p,0) * -58px),0);
}
.plate{
  position:absolute;margin:0;overflow:hidden;z-index:1;
  border:1px solid rgba(17,17,17,.2);
  background:linear-gradient(150deg,rgba(201,167,160,.35),rgba(245,242,236,.9));
  will-change:transform;transition:opacity .8s ease;
}
.plateImg{width:100%;height:100%;object-fit:cover}
.plateA{left:2%;top:13%;width:min(36%,15rem);aspect-ratio:3/4;transform:translate3d(0,calc(var(--p,0) * -26px),0)}
.plateB{left:27%;top:47%;width:min(27%,12rem);aspect-ratio:4/5;z-index:2;transform:translate3d(0,calc(var(--p,0) * -46px),0)}
.stage.flip .plateA{opacity:.2}
.stage.flip .plateB{opacity:1}

.stageText{
  position:relative;z-index:3;max-width:32rem;text-align:right;
  padding:1rem 0 1rem 1.2rem;
  background:linear-gradient(90deg,transparent,rgba(245,242,236,.88) 45%);
}
.stageText h1{font-size:clamp(2rem,6vw,4.2rem);letter-spacing:-.02em;margin:0 0 .7rem}
.lede{margin:0;font-size:1.05rem;line-height:1.6;color:rgba(17,17,17,.7)}
.cue{
  display:inline-block;margin-top:1.1rem;min-height:44px;padding:.55rem .9rem;
  font-family:var(--mono);font-size:1rem;text-decoration:none;border:1px solid var(--line);
}
.cue:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* 正文 + 侧栏 */
.story{
  display:grid;grid-template-columns:minmax(0,1fr) 15.5rem;gap:2.4rem;
  align-items:start;padding-bottom:3rem;
}
.prose{min-width:0}
.prose article{padding:2.3rem 0;border-top:1px solid var(--line);scroll-margin-top:9rem}
.prose article:first-child{border-top:0;padding-top:2.6rem}
.prose article.hit{background:rgba(201,167,160,.16);box-shadow:0 0 0 1.1rem rgba(201,167,160,.16)}
.prose h2{font-size:clamp(1.55rem,4vw,2.2rem);margin:0 0 .9rem}
.prose h3{font-size:1.3rem;margin:1.6rem 0 .5rem}
.prose p{margin:0 0 1.1rem}
.prose a{color:#8a625b;text-decoration:underline;text-underline-offset:.2em}
.prose ul,.prose ol{margin:0 0 1.2rem;padding-left:1.2rem}
.prose li{margin:.35rem 0}
.prose blockquote{
  margin:0 0 1.2rem;padding:.4rem 0 .4rem 1rem;
  border-left:3px solid var(--rose);color:rgba(17,17,17,.78);
}
.prose img{margin:0 0 1.2rem;border:1px solid var(--line)}
.prose strong{font-weight:600}
.prose table{width:100%;border-collapse:collapse;margin:0 0 1.2rem;font-size:1rem}
.prose th,.prose td{border:1px solid var(--line);padding:.5rem .6rem;text-align:left;vertical-align:top}

.side{
  position:sticky;top:8.4rem;margin-top:2.6rem;padding:1rem 1rem 1.3rem;
  border:1px solid var(--line);
  background:rgba(245,242,236,.55);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.side h2{font-size:1rem;letter-spacing:.04em;margin:0}
.side ol{list-style:none;margin:0;padding:0;display:grid;gap:.05rem}
.side a{
  display:block;padding:.5rem 0;font-size:1rem;line-height:1.45;
  text-decoration:none;border-bottom:1px dotted var(--line);
}
.side a:hover{color:#8a625b}

/* 页脚三栏 */
.foot{
  display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:1.6rem;
  border-top:1px solid var(--line);background:rgba(17,17,17,.04);
  padding:2.4rem 1.1rem 0;
}
.footMark{margin:0 0 .8rem;font-family:var(--display);font-size:1.3rem;font-weight:700}
.footCol h3{font-size:1rem;letter-spacing:.05em;margin:0 0 .6rem}
.footCol ol{
  list-style:none;margin:0;padding:0;display:grid;gap:.05rem;
  grid-template-columns:repeat(2,minmax(0,1fr));
}
.footCol a{
  display:block;min-height:40px;padding:.45rem 0;font-size:1rem;
  line-height:1.5;text-decoration:none;
}
.footCol a:hover{color:#8a625b}
.toTop{
  display:inline-block;min-height:44px;padding:.55rem .9rem;
  font-size:1rem;text-decoration:none;border:1px solid var(--line);
}
.toTop:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.join{display:flex;gap:.4rem;flex-wrap:wrap;margin:0}
.joinInput{
  flex:1 1 8rem;min-height:44px;padding:.5rem .65rem;font:inherit;font-size:1rem;
  border:1px solid var(--line);border-radius:0;background:rgba(245,242,236,.6);color:inherit;
}
.joinInput::placeholder{color:var(--quiet)}
.joinBtn{
  min-height:44px;padding:.5rem 1rem;font:inherit;font-size:1rem;
  border:1px solid var(--ink);background:var(--ink);color:var(--paper);
  border-radius:0;cursor:pointer;transition:background .25s ease;
}
.joinBtn:hover{background:#2c2c2c}
.joinBtn.done{background:var(--rose);border-color:var(--rose);color:var(--ink)}
.footBase{grid-column:1/-1;border-top:1px solid var(--line);padding:1.1rem 0;text-align:center}
.footBase p{margin:0;font-size:1rem;color:var(--quiet)}

@media (max-width:1199px){
  .railList{display:none}
  .rail{grid-template-columns:1fr auto 1fr}
}
@media (max-width:900px){
  .story{grid-template-columns:1fr;gap:1.4rem}
  .side{position:static;margin-top:0;order:2}
  .prose article:first-child{padding-top:2rem}
}
@media (max-width:640px){
  .stage{min-height:74vh;padding:2rem 1.1rem 1.6rem}
  .ghost{top:1.1rem;font-size:3.2rem;opacity:.9}
  .plateA{width:44%;top:16%}
  .plateB{width:30%;left:48%;top:22%}
  .stageText{max-width:none;padding-top:1.4rem;background:linear-gradient(180deg,transparent,rgba(245,242,236,.92) 34%)}
  .findInput{width:6.5rem}
  .foot{grid-template-columns:1fr;gap:1.3rem}
  .prose article{padding:1.9rem 0}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .plate,.ghost{transform:none!important;transition:none}
  .plate.swap,.stage.flip .plateA{opacity:1}
}

button[aria-expanded]{min-width:44px;min-height:44px}