@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;700;900&display=swap');

:root{
  --paper:#fafaf8;
  --graphite:#4a4a4a;
  --ink:#1a1a1a;
  --line:rgba(26,26,26,.2);
  --dim:rgba(26,26,26,.08);
  --maxw:1140px;
  --dock:74px;
}

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

html{
  scroll-behavior:smooth;
  scroll-padding-top:1.5rem;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  padding-bottom:calc(var(--dock) + 26px);
  background-color:var(--paper);
  background-image:
    radial-gradient(circle at 18% 8%, rgba(74,74,74,.09), transparent 42%),
    radial-gradient(circle at 84% 72%, rgba(26,26,26,.07), transparent 46%),
    repeating-linear-gradient(94deg, rgba(26,26,26,.035) 0 1px, transparent 1px 7px);
  color:var(--ink);
  font-family:"Outfit","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.78;
  letter-spacing:.012em;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:1;
  pointer-events:none;
  opacity:.55;
  mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='g'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='140' height='140' filter='url(%23g)' opacity='0.22'/></svg>");
}

body.is-locked{overflow:hidden}

a{color:inherit}

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

/* ---------- 底部固定条 ---------- */

.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:60;
  display:flex;
  align-items:center;
  min-height:var(--dock);
  padding:.45rem clamp(.75rem,3vw,1.6rem);
  background:var(--ink);
  color:var(--paper);
  background-image:repeating-linear-gradient(90deg, rgba(250,250,248,.06) 0 1px, transparent 1px 9px);
  border-top:2px solid var(--ink);
}

.dock__nav{
  flex:1;
  display:flex;
  justify-content:space-between;
  padding-right:6.8rem;
  min-width:0;
}

.dock__list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  gap:.1rem;
}

.dock__list--r{justify-content:flex-end}

.dock a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:.35rem .5rem;
  color:var(--paper);
  text-decoration:none;
  font-size:.88rem;
  letter-spacing:.04em;
  border-bottom:2px solid transparent;
}

.dock a:hover,.dock a:focus-visible{border-bottom-color:var(--paper)}

.brand{
  position:absolute;
  left:50%;
  transform:translateX(-50%) rotate(-1deg);
  padding:.45rem .9rem;
  min-height:44px;
  display:inline-flex;
  align-items:center;
  color:var(--paper);
  text-decoration:none;
  font-weight:900;
  font-size:.98rem;
  letter-spacing:.16em;
  border:1px dashed rgba(250,250,248,.42);
  border-radius:8px;
}

.cta{
  position:absolute;
  right:clamp(.75rem,3vw,1.6rem);
  top:50%;
  transform:translateY(-50%) rotate(-1.4deg);
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  min-height:42px;
  padding:.35rem .72rem;
  background:var(--paper);
  color:var(--ink);
  border:2px solid var(--paper);
  border-radius:10px;
  font:inherit;
  font-size:.85rem;
  font-weight:700;
  letter-spacing:.1em;
  cursor:pointer;
}

.cta__bars{display:grid;gap:3px;width:15px}
.cta__bars span{display:block;height:2px;background:var(--ink)}
.cta__bars span:nth-child(2){width:78%}
.cta__bars span:nth-child(3){width:52%}

/* ---------- 全屏遮罩菜单 ---------- */

.sheet{
  position:fixed;
  inset:0;
  z-index:80;
  display:grid;
  grid-template-rows:auto 1fr;
  gap:1rem;
  padding:clamp(1rem,4vw,2rem) clamp(1rem,4vw,2.5rem) calc(var(--dock) + 1.5rem);
  background:var(--ink);
  color:var(--paper);
  background-image:repeating-linear-gradient(2deg, rgba(250,250,248,.07) 0 1px, transparent 1px 11px);
  overflow-y:auto;
  visibility:hidden;
  opacity:0;
  transition:opacity .16s ease, visibility .16s linear;
}

.sheet[data-open="true"]{visibility:visible;opacity:1}

.sheet__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  padding-bottom:.8rem;
  border-bottom:1px solid rgba(250,250,248,.3);
}

.sheet__brand{font-weight:900;letter-spacing:.22em;font-size:.95rem}

.sheet__close{
  min-height:42px;
  padding:.35rem .85rem;
  background:transparent;
  color:var(--paper);
  border:2px solid rgba(250,250,248,.6);
  border-radius:10px;
  font:inherit;
  font-size:.85rem;
  letter-spacing:.12em;
  cursor:pointer;
}

.sheet__nav ul{list-style:none;margin:0;padding:0;display:grid}

.sheet__nav a{
  display:flex;
  align-items:baseline;
  gap:1rem;
  min-height:54px;
  padding:.6rem 0;
  color:var(--paper);
  text-decoration:none;
  font-size:clamp(1.35rem,5.4vw,2.4rem);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.2;
  border-bottom:1px dashed rgba(250,250,248,.22);
}

.sheet__nav a:hover,.sheet__nav a:focus-visible{background:rgba(250,250,248,.08)}

.sheet__n{
  font-size:.78rem;
  font-weight:500;
  letter-spacing:.2em;
  color:rgba(250,250,248,.62);
  min-width:2.6ch;
}

/* ---------- 首屏拼贴 ---------- */

.hero{
  position:relative;
  min-height:100vh;
  min-height:100svh;
  display:grid;
  place-items:center;
  padding:clamp(4rem,12vh,8rem) 1.15rem calc(var(--dock) + 3rem);
  overflow:hidden;
  border-bottom:1px solid var(--line);
}

.hero__band{
  position:absolute;
  z-index:0;
  left:-8%;
  right:-8%;
  top:52%;
  height:clamp(48px,9vw,104px);
  background:var(--graphite);
  opacity:.17;
  transform:rotate(-3.4deg);
}

.collage__fig{
  position:absolute;
  z-index:1;
  margin:0;
  padding:8px 8px 24px;
  background:#fff;
  border:1px solid var(--line);
  box-shadow:7px 9px 0 rgba(26,26,26,.13);
  will-change:transform;
}

.collage__fig--1{
  width:clamp(112px,25vw,228px);
  top:11%;
  left:clamp(.5rem,5vw,4.5rem);
  transform:translateY(var(--py,0)) rotate(-4.6deg);
}

.collage__fig--2{
  width:clamp(124px,27vw,246px);
  bottom:15%;
  right:clamp(.5rem,5vw,4.5rem);
  transform:translateY(var(--py,0)) rotate(3.2deg);
}

.collage__fig::before{
  content:"";
  position:absolute;
  top:-11px;
  left:50%;
  width:66px;
  height:20px;
  transform:translateX(-50%) rotate(-3deg);
  background:rgba(250,250,248,.66);
  border:1px solid rgba(26,26,26,.16);
}

.collage__pic{
  display:block;
  width:100%;
  filter:grayscale(1) contrast(1.1);
}

.collage__cap{
  position:absolute;
  bottom:5px;
  left:10px;
  font-size:.66rem;
  letter-spacing:.22em;
  color:var(--graphite);
}

.hero__text{
  position:relative;
  z-index:3;
  text-align:center;
  max-width:24ch;
}

.hero__title{
  margin:0 0 .9rem;
  font-size:clamp(2.3rem,9.2vw,5rem);
  font-weight:900;
  line-height:.98;
  letter-spacing:-.035em;
  text-transform:uppercase;
}

.hero__title::after{
  content:"";
  display:block;
  width:52%;
  height:5px;
  margin:1rem auto 0;
  background:var(--ink);
  transform:scaleY(.7) rotate(-.7deg);
}

.hero__desc{
  margin:0 auto;
  max-width:30ch;
  font-size:.98rem;
  line-height:1.75;
  color:var(--graphite);
}

/* ---------- 侧栏 + 正文 ---------- */

.layout{
  display:grid;
  grid-template-columns:206px minmax(0,1fr);
  gap:clamp(1.4rem,3.6vw,3.4rem);
  align-items:start;
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(2.2rem,6vw,4.4rem) clamp(1rem,4vw,2rem);
}

.rail{
  position:sticky;
  top:1.6rem;
  padding-left:1rem;
  border-left:3px solid var(--ink);
}

.rail__h{
  margin:0;
  font-size:.9rem;
  font-weight:700;
  letter-spacing:.3em;
  text-transform:uppercase;
}

hr{
  height:3px;
  border:0;
  margin:.7rem 0 1rem;
  max-width:118px;
  background:var(--ink);
  transform:scaleY(.6) rotate(-.4deg);
  transform-origin:left center;
}

.rail__nav ul{list-style:none;margin:0;padding:0;display:grid}

.rail__nav a{
  display:flex;
  align-items:baseline;
  gap:.45rem;
  min-height:44px;
  padding:.42rem .1rem;
  font-size:.94rem;
  line-height:1.45;
  color:var(--graphite);
  text-decoration:none;
  border-bottom:1px dashed var(--line);
}

.rail__nav a:hover,.rail__nav a:focus-visible{color:var(--ink);background:var(--dim)}

.rail__n{
  font-size:.72rem;
  letter-spacing:.16em;
  color:rgba(26,26,26,.45);
  min-width:2.2ch;
}

.layout__body{min-width:0}

.prose{padding-bottom:1rem}

.prose section{
  padding-block:clamp(1.4rem,4vw,2.2rem);
  border-top:1px dashed var(--line);
  scroll-margin-top:1.6rem;
}

.prose section:first-child{border-top:0;padding-top:0}

.prose section.will-reveal{opacity:0;transform:translateY(14px) rotate(-.25deg)}
.prose section.is-in{opacity:1;transform:none;transition:opacity .38s ease, transform .38s ease}

.prose h1,.prose h2,.prose h3,.prose h4{
  font-weight:900;
  line-height:1.22;
  letter-spacing:-.022em;
  text-wrap:balance;
}

.prose h1{margin:0 0 .8rem;font-size:clamp(1.7rem,4.2vw,2.4rem)}
.prose h2{margin:0 0 .5rem;font-size:clamp(1.5rem,3.6vw,2.1rem)}
.prose h3{margin:1.6rem 0 .45rem;font-size:1.16rem}
.prose h4{margin:1.3rem 0 .4rem;font-size:1rem;letter-spacing:.02em}

.prose h2+hr,.prose h3+hr{margin:.2rem 0 1.15rem;max-width:74px}

.prose p{margin:0 0 1.1rem;max-width:66ch;color:var(--graphite)}

.prose a{
  color:var(--ink);
  text-decoration:underline;
  text-decoration-thickness:2px;
  text-underline-offset:3px;
}

.prose strong,.prose b{color:var(--ink);font-weight:900}

.prose ul,.prose ol{margin:0 0 1.15rem;padding-left:1.35rem;max-width:64ch;color:var(--graphite)}
.prose li{margin:.28rem 0}
.prose li::marker{color:var(--ink)}

.prose blockquote{
  margin:1.5rem 0;
  padding:.5rem 0 .5rem 1rem;
  border-left:4px solid var(--ink);
  background:var(--dim);
  color:var(--graphite);
}

.prose blockquote p:last-child{margin-bottom:0}

.prose figure{margin:1.5rem 0}
.prose figcaption{font-size:.82rem;color:var(--graphite);letter-spacing:.06em}
.prose img{filter:grayscale(1) contrast(1.06);border:1px solid var(--line)}

.prose table{
  width:100%;
  border-collapse:collapse;
  margin:0 0 1.2rem;
  font-size:.94rem;
  display:block;
  overflow-x:auto;
}

.prose th,.prose td{
  padding:.55rem .7rem;
  border-bottom:1px solid var(--line);
  text-align:left;
  vertical-align:top;
}

.prose th{font-weight:700;color:var(--ink);background:var(--dim)}

.prose code{
  font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  font-size:.9em;
  background:var(--dim);
  padding:.1em .35em;
}

.prose pre{
  overflow-x:auto;
  padding:1rem;
  background:var(--ink);
  color:var(--paper);
  border-radius:10px;
}

/* ---------- 页脚 ---------- */

.foot{
  margin-top:clamp(2rem,6vw,3.6rem);
  padding:clamp(2rem,6vw,3.2rem) clamp(1rem,4vw,2rem) 1.4rem;
  background:var(--ink);
  color:var(--paper);
  background-image:repeating-linear-gradient(178deg, rgba(250,250,248,.06) 0 1px, transparent 1px 12px);
}

.foot__cta{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:1rem;
  max-width:var(--maxw);
  margin:0 auto;
  padding-bottom:1.6rem;
  border-bottom:2px solid rgba(250,250,248,.34);
}

.foot__big{
  margin:0;
  font-size:clamp(1.9rem,7.6vw,3.8rem);
  font-weight:900;
  line-height:1;
  letter-spacing:-.03em;
}

.foot__go{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:.45rem 1rem;
  color:var(--paper);
  text-decoration:none;
  font-weight:700;
  letter-spacing:.06em;
  border:2px solid rgba(250,250,248,.75);
  border-radius:10px;
  transform:rotate(-1.1deg);
}

.foot__go:hover,.foot__go:focus-visible{background:var(--paper);color:var(--ink)}

.foot__bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.6rem 1rem;
  max-width:var(--maxw);
  margin:0 auto;
  padding-top:1rem;
  font-size:.84rem;
}

.foot__logo{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-weight:900;
  letter-spacing:.18em;
  color:var(--paper);
  text-decoration:none;
}

.foot__nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.1rem}

.foot__nav a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:.3rem .5rem;
  color:rgba(250,250,248,.86);
  text-decoration:none;
  border-bottom:2px solid transparent;
}

.foot__nav a:hover,.foot__nav a:focus-visible{border-bottom-color:var(--paper)}

.foot__copy{margin:0;color:rgba(250,250,248,.6);letter-spacing:.06em}

/* ---------- 响应式 ---------- */

@media (max-width:900px){
  .dock__nav{padding-right:5.6rem}
  .dock__list{display:none}
  .brand{font-size:.9rem;letter-spacing:.12em}

  .layout{grid-template-columns:minmax(0,1fr)}
  .rail{
    position:static;
    padding:1rem 0 0;
    border-left:0;
    border-top:2px solid var(--ink);
  }
  .rail__h{font-size:.82rem}
  .rail__nav ul{display:flex;flex-wrap:wrap;gap:.35rem}
  .rail__nav a{
    min-height:40px;
    padding:.35rem .6rem;
    border:1px solid var(--line);
    border-radius:8px;
  }
  .rail__n{display:none}
}

@media (max-width:640px){
  body{font-size:16.5px}

  .hero{padding-top:clamp(3.2rem,10vh,5rem)}
  .hero__desc{font-size:.92rem}
  .collage__fig--1{top:8%;left:.4rem;width:38%}
  .collage__fig--2{bottom:12%;right:.4rem;width:42%;bottom:16%}
  .hero__band{top:48%;opacity:.13}

  .foot__cta{flex-direction:column;align-items:flex-start}
  .foot__bar{justify-content:flex-start}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .sheet{transition:none}
  .prose article.will-reveal{opacity:1;transform:none}
  .collage__fig{transform:none}
}

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