:root{
  --paper:#fafaf8;
  --mid:#4a4a4a;
  --ink:#1a1a1a;
  --display:"Anton","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --body:"Epilogue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  overflow-x:hidden;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:99;
  pointer-events:none;
  opacity:.55;
  mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='140' height='140' filter='url(%23n)' opacity='0.3'/></svg>");
  background-size:140px 140px;
}

img{max-width:100%;height:auto;display:block}

a{
  color:inherit;
  text-decoration:underline;
  text-decoration-thickness:2px;
  text-underline-offset:4px;
  transition:background-color 90ms linear,color 90ms linear;
}
a:hover{background:var(--ink);color:var(--paper)}
a:focus-visible,button:focus-visible{outline:3px solid var(--ink);outline-offset:3px}

/* ――― 左侧竖排固定栏 ――― */
.rail{
  position:sticky;
  top:0;
  z-index:40;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:8px 16px;
  background:var(--paper);
  border-bottom:3px solid var(--ink);
}

.brand{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  font-family:var(--display);
  font-size:22px;
  line-height:1.1;
  letter-spacing:.02em;
  text-decoration:none;
}
.brand:hover{background:transparent;color:var(--ink)}
.brand-t{display:inline-block;transform:rotate(-1.4deg)}

.menu-btn{
  min-height:44px;
  padding:0 18px;
  font:inherit;
  font-size:16px;
  background:var(--paper);
  color:var(--ink);
  border:2px solid var(--ink);
  border-radius:4px;
  cursor:pointer;
  transition:background-color 90ms linear,color 90ms linear;
}
.menu-btn:hover{background:var(--ink);color:var(--paper)}

.rail-nav{
  position:fixed;
  left:0;
  right:0;
  top:63px;
  z-index:39;
  display:none;
  max-height:calc(100vh - 63px);
  overflow:auto;
  padding:14px 16px 22px;
  background:var(--paper);
  border-bottom:3px solid var(--ink);
}
body.nav-open .rail-nav{display:block}

.grp{
  margin:0 0 6px;
  font-family:var(--display);
  font-size:13px;
  letter-spacing:.2em;
  color:var(--mid);
}

.rail-nav ul{
  list-style:none;
  margin:0 0 16px;
  padding:0;
}
.rail-nav ul:last-child{margin-bottom:0}

.rail-nav a{
  display:block;
  min-height:44px;
  padding:10px 8px;
  font-size:17px;
  text-decoration:none;
  border-bottom:1px dashed #cfcfc9;
  transform:rotate(-.3deg);
}
.rail-nav li:nth-child(even) a{transform:rotate(.3deg)}

/* ――― 主体 ――― */
main{display:block}

.wrap{
  max-width:1160px;
  margin:0 auto;
  padding:0 16px 64px;
}

.hero{
  position:relative;
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  min-height:70vh;
  margin:0 -16px 30px;
  padding:26px 16px 30px;
  overflow:hidden;
  border-bottom:3px solid var(--ink);
}

.ghost{
  position:absolute;
  left:-4px;
  bottom:32%;
  max-width:140%;
  font-family:var(--display);
  font-size:clamp(56px,17vw,150px);
  line-height:.9;
  letter-spacing:-.01em;
  white-space:nowrap;
  color:rgba(26,26,26,.07);
  -webkit-text-stroke:1.5px rgba(26,26,26,.18);
  pointer-events:none;
  user-select:none;
}

.collage{
  position:absolute;
  left:12px;
  top:20px;
  width:66%;
  height:52%;
  z-index:1;
}

.ph{
  position:absolute;
  margin:0;
  padding:6px;
  width:58%;
  background:#fff;
  border:3px solid var(--ink);
  border-radius:4px;
}
.ph::before{
  content:"";
  position:absolute;
  left:50%;
  top:-11px;
  width:56px;
  height:20px;
  margin-left:-28px;
  background:rgba(26,26,26,.16);
  transform:rotate(-2deg);
}
.ph-a{left:0;top:0;transform:rotate(-3.2deg)}
.ph-b{right:0;bottom:0;width:52%;transform:rotate(2.6deg)}

.ph img{
  width:100%;
  aspect-ratio:3 / 4;
  object-fit:cover;
  filter:grayscale(.2) contrast(1.08);
}

.hero-txt{
  position:relative;
  z-index:2;
  text-align:right;
}

.hero h1{
  margin:0;
  font-family:var(--display);
  font-weight:400;
  font-size:clamp(40px,11vw,92px);
  line-height:1.02;
  letter-spacing:.01em;
  transform:rotate(-.8deg);
}

.cols{display:grid;grid-template-columns:1fr;gap:32px}

.prose{min-width:0}

.prose > div{
  position:relative;
  margin:0 0 30px;
  padding:20px 18px 24px;
  background:#fff;
  border:2px solid var(--ink);
  border-radius:4px;
  scroll-margin-top:96px;
}
.prose > div:nth-child(odd){transform:rotate(-.3deg)}
.prose > div:nth-child(even){transform:rotate(.3deg)}

.prose h2{
  margin:0 0 10px;
  font-family:var(--display);
  font-weight:400;
  font-size:clamp(23px,3.4vw,34px);
  line-height:1.15;
  letter-spacing:.01em;
}

.prose h2 + p,
.prose h2 + p.subtitle,
.prose h2 + p.subhead,
.prose h2 + p.desc,
.prose h2 + p.lead{
  margin:0 0 16px;
  padding-left:10px;
  color:var(--mid);
  font-size:16px;
  font-style:italic;
  border-left:3px solid var(--ink);
}

.prose h3{
  margin:24px 0 8px;
  font-size:19px;
  line-height:1.4;
}

.prose p{margin:0 0 16px}
.prose ul,.prose ol{margin:0 0 16px;padding-left:22px}
.prose li{margin:0 0 8px}

.prose blockquote{
  margin:0 0 16px;
  padding:12px 16px;
  background:#f2f2ee;
  border-left:4px solid var(--ink);
  font-style:italic;
}

.prose table{
  width:100%;
  margin:0 0 16px;
  border-collapse:collapse;
  font-size:16px;
}
.prose th,.prose td{
  padding:8px 10px;
  text-align:left;
  border:2px solid var(--ink);
}

.prose img{
  margin:0 0 16px;
  border:2px solid var(--ink);
  border-radius:4px;
}

.prose figure{margin:0 0 16px}

/* ――― 侧栏 ――― */
.side{
  padding-top:14px;
  border-top:3px solid var(--ink);
  scroll-margin-top:96px;
}
.side h2{
  margin:0;
  font-family:var(--display);
  font-weight:400;
  font-size:22px;
  line-height:1.2;
}
.side .subtitle{
  margin:2px 0 14px;
  font-size:15px;
  color:var(--mid);
}
.toc{list-style:none;margin:0;padding:0}
.toc a{
  display:block;
  min-height:44px;
  padding:9px 6px;
  font-size:16px;
  text-decoration:none;
  border-bottom:1px dashed #cfcfc9;
}
.toc li:last-child a{border-bottom:0}

/* ――― 页脚 ――― */
footer{
  margin-top:20px;
  padding:26px 16px 20px;
  background:#f2f2ee;
  border-top:3px solid var(--ink);
}

.fgrid{
  display:grid;
  grid-template-columns:1fr;
  gap:22px;
  max-width:1160px;
  margin:0 auto;
}

.faddr{margin:0 0 8px;font-style:normal}
.fname{
  font-family:var(--display);
  font-size:20px;
  letter-spacing:.02em;
}
.fdesc{margin:0;max-width:38ch;font-size:16px;color:var(--mid)}

.fnav dl{margin:0}
.fnav dt{
  font-family:var(--display);
  font-size:13px;
  letter-spacing:.2em;
  color:var(--mid);
}
.fnav dd{margin:0 0 2px}
.fnav dd a{
  display:inline-block;
  min-height:40px;
  padding:8px 0;
  font-size:16px;
  text-decoration:none;
}

.flinks{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:16px;
  max-width:1160px;
  margin:22px auto 0;
  padding:0;
  list-style:none;
}
.flinks a{
  display:inline-block;
  min-height:44px;
  padding:10px 16px;
  font-size:16px;
  text-decoration:none;
  border:2px solid var(--ink);
  border-radius:4px;
}

.copy{
  margin:16px 0 0;
  text-align:center;
  font-size:14px;
  color:var(--mid);
}

/* ――― 桌面：左栏固定竖排 ――― */
@media (min-width:900px){
  .rail{
    position:fixed;
    left:0;
    top:0;
    bottom:0;
    width:240px;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    padding:26px 20px;
    overflow-y:auto;
    border-bottom:0;
    border-right:3px solid var(--ink);
  }
  .brand{font-size:26px;line-height:1.08;align-items:flex-start}
  .menu-btn{display:none}
  .rail-nav{
    position:static;
    display:block;
    max-height:none;
    overflow:visible;
    margin-top:26px;
    padding:0;
    border:0;
  }
  main,footer{margin-left:240px}
  .wrap{padding:0 32px 80px}
  .hero{
    margin:0 0 34px;
    padding:40px 0 40px;
    min-height:70vh;
  }
  .collage{left:0;top:36px;width:48%;height:64%}
  .hero h1{font-size:clamp(52px,6.2vw,92px)}
  .cols{grid-template-columns:minmax(0,1fr) 268px;gap:44px;align-items:start}
  .side{position:sticky;top:24px}
  .prose > div{scroll-margin-top:24px}
  .fgrid{grid-template-columns:1fr 1fr;gap:40px}
  footer{margin-top:40px;padding:36px 32px 26px}
}

@media (min-width:760px) and (max-width:899px){
  .fgrid{grid-template-columns:1fr 1fr}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition:none !important;
  }
}

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