@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400&family=JetBrains+Mono:wght@400&family=Playfair+Display:ital@1&display=swap');

:root{
  --paper:#f5e6c8;
  --accent:#d4a574;
  --ink:#262117;
  --ink-soft:#4b4032;
  --line:rgba(38,33,23,.22);
  --glass:rgba(255,250,240,.45);
  --radius:28px;
  --serif:'Playfair Display','Songti SC','Noto Serif SC','Source Han Serif SC',Georgia,serif;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --wrap:1180px;
}

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

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

body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.78;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    radial-gradient(circle at 10% 6%,rgba(212,165,116,.42),transparent 44%),
    radial-gradient(circle at 92% 2%,rgba(255,255,255,.55),transparent 40%),
    linear-gradient(180deg,#f8ecd4 0%,#f2e1bf 55%,#ecd9b3 100%);
  background-attachment:fixed;
}

a:focus-visible,button:focus-visible,input:focus-visible{
  outline:3px solid #8a5a2b;
  outline-offset:2px;
}

/* 胶片颗粒与漏光 */
.grain{
  position:fixed;
  inset:0;
  z-index:60;
  pointer-events:none;
  opacity:.26;
  mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
  background-size:160px 160px;
}

.leak{
  position:fixed;
  inset:0;
  z-index:59;
  pointer-events:none;
  background:
    radial-gradient(58% 40% at 6% 10%,rgba(255,214,150,.55),transparent 70%),
    radial-gradient(46% 34% at 94% 84%,rgba(206,118,84,.26),transparent 72%);
  animation:leak 19s ease-in-out infinite alternate;
}

@keyframes leak{
  from{opacity:.5;transform:translate3d(0,0,0)}
  to{opacity:.86;transform:translate3d(0,-2%,0)}
}

.skip{
  position:absolute;
  left:12px;
  top:-70px;
  z-index:80;
  padding:12px 20px;
  border-radius:999px;
  background:var(--ink);
  color:var(--paper);
  text-decoration:none;
  font-size:16px;
  font-weight:700;
  transition:top .2s;
}

.skip:focus{top:12px}

/* 页头：品牌居中，菜单分列两侧 */
.mast{
  border-bottom:1px solid var(--line);
  padding:10px 4vw;
}

.mast__row{
  max-width:var(--wrap);
  margin:0 auto;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:10px;
}

.wing__list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:2px;
}

.wing--right .wing__list{justify-content:flex-end}

.wing__link{
  display:inline-block;
  padding:12px 13px;
  border-radius:999px;
  text-decoration:none;
  color:var(--ink);
  font-size:16px;
  font-weight:600;
  letter-spacing:.02em;
  transition:background .2s,color .2s;
}

.wing__link:hover,.wing__link:focus-visible{
  background:rgba(38,33,23,.1);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  text-decoration:none;
  color:var(--ink);
}

.brand__mark{color:#8a5a2b;font-size:18px}

.brand__name{
  font-family:var(--serif);
  font-size:clamp(18px,2.3vw,24px);
  font-weight:700;
  letter-spacing:.06em;
  white-space:nowrap;
}

/* 吸顶锚点条 */
.dock{
  position:sticky;
  top:0;
  z-index:40;
  background:rgba(245,230,200,.87);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px) saturate(.92);
  transition:box-shadow .25s;
}

.dock.is-stuck{box-shadow:0 10px 26px rgba(38,33,23,.16)}

.dock__nav{
  max-width:var(--wrap);
  margin:0 auto;
  padding:8px 4vw;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
}

.dock__nav::-webkit-scrollbar{height:0}

.dock__list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  gap:8px;
  width:max-content;
  min-width:100%;
}

.pill{
  display:inline-block;
  padding:10px 16px;
  border:1px solid var(--line);
  border-radius:999px;
  background:var(--glass);
  text-decoration:none;
  color:var(--ink);
  font-size:16px;
  font-weight:600;
  white-space:nowrap;
  transition:background .2s,color .2s,border-color .2s;
}

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

/* 主体 */
.sheet{
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 4vw 56px;
}

.hero{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:clamp(22px,4vw,58px);
  align-items:center;
  min-height:100vh;
  min-height:100svh;
  padding:clamp(30px,6vh,72px) 0;
  background-image:radial-gradient(rgba(38,33,23,.15) 1px,transparent 1.7px);
  background-size:22px 22px;
}

.hero__text{animation:rise .85s .05s both}

.hero__title{
  font-family:var(--serif);
  font-size:clamp(2.1rem,6.2vw,4.4rem);
  line-height:1.05;
  letter-spacing:-.02em;
  margin:0 0 18px;
  text-wrap:balance;
}

.hero__lede{
  margin:0 0 26px;
  max-width:40ch;
  font-size:17px;
  line-height:1.8;
  color:var(--ink-soft);
}

.hero__act{margin:0}

.btn{
  display:inline-block;
  padding:13px 26px;
  border-radius:999px;
  border:1px solid var(--ink);
  background:var(--ink);
  color:var(--paper);
  font-size:16px;
  font-weight:700;
  letter-spacing:.06em;
  text-decoration:none;
  transition:transform .2s,background .2s;
}

.btn:hover,.btn:focus-visible{
  background:#3b3126;
  transform:translateY(-2px);
}

.btn--thin{padding:10px 18px;font-weight:600}

.hero__media{
  justify-self:end;
  width:100%;
  max-width:430px;
  animation:fade 1.1s .2s both;
  will-change:transform;
}

@keyframes rise{
  from{opacity:0;transform:translateY(18px)}
  to{opacity:1;transform:none}
}

@keyframes fade{
  from{opacity:0}
  to{opacity:1}
}

.polaroid{
  margin:0;
  padding:12px 12px 0;
  border-radius:6px;
  background:#fdf7ea;
  box-shadow:0 20px 44px rgba(38,33,23,.28);
  transform:rotate(-1.7deg);
  transition:transform .45s;
}

.polaroid:hover{animation:vhs .7s steps(4) forwards}

@keyframes vhs{
  0%{transform:rotate(-1.7deg) skewX(0)}
  45%{transform:rotate(-.5deg) skewX(-1.6deg)}
  100%{transform:rotate(.7deg) skewX(0)}
}

.polaroid__img{
  display:block;
  width:100%;
  height:auto;
  border-radius:2px;
  filter:sepia(.3) contrast(1.06) saturate(.82);
}

.polaroid__cap{
  padding:10px 2px 14px;
  text-align:center;
  font-family:var(--serif);
  font-size:16px;
  letter-spacing:.1em;
  color:var(--ink-soft);
}

.polaroid--empty{
  aspect-ratio:4/5;
  min-height:300px;
  background:linear-gradient(160deg,#fdf7ea,#e7d3b1);
}

/* 内容区：左侧栏 + 正文 */
.desk{
  display:grid;
  grid-template-columns:250px minmax(0,1fr);
  gap:clamp(20px,3vw,44px);
  align-items:start;
  padding-top:clamp(28px,4vw,52px);
  border-top:2px solid var(--ink);
}

.rail{
  position:sticky;
  top:86px;
}

.rail__card{
  padding:22px 20px;
  border:1px solid rgba(255,255,255,.65);
  border-radius:var(--radius);
  background:var(--glass);
  backdrop-filter:blur(12px) saturate(.9);
  box-shadow:0 14px 32px rgba(38,33,23,.12);
}

.rail__mark{
  display:block;
  margin-bottom:8px;
  font-size:22px;
  color:#8a5a2b;
}

.rail__title{
  margin:0 0 6px;
  font-family:var(--serif);
  font-size:20px;
  letter-spacing:.05em;
  line-height:1.3;
}

.subtitle{
  margin:0;
  font-size:16px;
  line-height:1.65;
  color:var(--ink-soft);
}

.prose{
  min-width:0;
  max-width:74ch;
  font-size:17px;
  line-height:1.85;
}

.prose > div{
  padding:clamp(24px,3.4vw,42px) 0;
  border-bottom:1px dashed var(--line);
  scroll-margin-top:98px;
}

.prose > div:last-child{border-bottom:0;padding-bottom:0}

.prose h2{
  font-family:var(--serif);
  font-size:clamp(1.5rem,3.1vw,2.1rem);
  line-height:1.22;
  letter-spacing:-.01em;
  margin:0 0 14px;
}

.prose h2 + p{
  font-size:18px;
  color:var(--ink-soft);
}

.prose h3{
  font-family:var(--serif);
  font-size:19px;
  letter-spacing:.01em;
  margin:1.5em 0 .6em;
}

.prose p{margin:0 0 1.05em}

.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.35em}

.prose li{margin:.36em 0}

.prose a{
  color:#8a5a2b;
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}

.prose img{
  max-width:100%;
  height:auto;
  border-radius:4px;
  filter:sepia(.22) contrast(1.04) saturate(.88);
}

.prose figure{margin:1.4em 0}

.prose blockquote{
  margin:1.4em 0;
  padding:14px 20px;
  border-left:3px solid var(--accent);
  border-radius:0 18px 18px 0;
  background:rgba(255,255,255,.4);
  color:var(--ink-soft);
}

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

.prose table{
  width:100%;
  border-collapse:collapse;
  margin:0 0 1.3em;
  font-size:16px;
}

.prose th,.prose td{
  border:1px solid var(--line);
  padding:9px 11px;
  text-align:left;
}

.prose th{background:rgba(212,165,116,.28)}

.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .7s ease,transform .7s ease;
}

.reveal.in{opacity:1;transform:none}

/* 页脚 */
.foot{
  margin-top:44px;
  padding:clamp(24px,4vw,44px) 4vw 18px;
  border-top:2px solid var(--ink);
  background:linear-gradient(180deg,rgba(255,255,255,.32),rgba(255,255,255,0));
}

.foot__grid{
  max-width:var(--wrap);
  margin:0 auto;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px 28px;
}

.foot__cell--brand{display:flex;align-items:center;gap:8px}

.foot__mark{color:#8a5a2b;font-size:18px}

.foot__name{
  margin:0;
  font-family:var(--serif);
  font-size:17px;
  font-weight:700;
  letter-spacing:.07em;
}

.foot__list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:0 4px;
  max-width:430px;
}

.foot__link{
  display:inline-block;
  padding:11px 8px;
  min-height:40px;
  font-size:16px;
  color:var(--ink-soft);
  text-decoration:none;
}

.foot__link:hover,.foot__link:focus-visible{
  color:var(--ink);
  text-decoration:underline;
  text-underline-offset:3px;
}

.sub{display:flex;gap:8px}

.sub__in{
  width:150px;
  min-width:0;
  padding:11px 15px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(255,255,255,.62);
  font:inherit;
  font-size:16px;
  color:var(--ink);
}

.sub__btn{
  padding:11px 20px;
  border:1px solid var(--ink);
  border-radius:999px;
  background:var(--ink);
  color:var(--paper);
  font:inherit;
  font-size:16px;
  font-weight:700;
  cursor:pointer;
  transition:background .2s;
}

.sub__btn:hover{background:#3b3126}

.foot__cell--meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap}

.foot__host{margin:0;font-size:16px;color:var(--ink-soft)}

.foot__base{
  max-width:var(--wrap);
  margin:20px auto 0;
  padding-top:14px;
  border-top:1px dashed var(--line);
  text-align:center;
}

.foot__copy{
  margin:0;
  font-size:16px;
  color:var(--ink-soft);
}

@media (max-width:900px){
  .mast__wing{display:none}
  .mast__row{grid-template-columns:1fr;justify-items:center}
  .hero{
    grid-template-columns:1fr;
    min-height:0;
    padding:34px 0 26px;
  }
  .hero__media{justify-self:start;max-width:340px}
  .desk{grid-template-columns:1fr}
  .rail{position:static}
  .rail__card{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:6px 14px;
    padding:18px 20px;
  }
  .rail__mark{margin:0}
  .rail__title{font-size:18px;margin:0}
  .subtitle{flex:1 1 100%}
}

@media (max-width:560px){
  body{font-size:17px}
  .hero__title{font-size:clamp(2rem,9vw,2.7rem)}
  .sheet{padding-bottom:40px}
  .foot__grid{flex-direction:column;align-items:flex-start}
  .sub{width:100%}
  .sub__in{flex:1 1 auto;width:auto}
  .foot__list{max-width:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .reveal{opacity:1 !important;transform:none !important}
}

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