@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:wght@400;500;600;700&display=swap');

:root{
  --paper:#f5e6c8;
  --paper2:#eddab4;
  --tan:#d4a574;
  --ink:#262117;
  --ink2:#584a35;
  --rail:100px;
  --strip:34px;
  --r:18px;
  --serif:'Playfair Display','Songti SC','Noto Serif SC',Georgia,serif;
  --sans:'Inter',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  overflow-x:hidden;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%}
a{color:inherit}
:focus-visible{outline:2px solid var(--tan);outline-offset:3px}

/* 胶片颗粒 */
body::before{
  content:'';
  position:fixed;
  inset:-50%;
  z-index:60;
  pointer-events:none;
  opacity:.15;
  mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='150' height='150'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='150' height='150' filter='url(%23n)'/%3E%3C/svg%3E");
  animation:grain 1.2s steps(3) infinite;
}
@keyframes grain{
  0%{transform:translate3d(0,0,0)}
  33%{transform:translate3d(-1%,1%,0)}
  66%{transform:translate3d(1%,-1%,0)}
  100%{transform:translate3d(0,0,0)}
}

/* 顶部细条 */
.strip{
  margin:0;
  position:fixed;
  top:0;left:0;right:0;
  height:var(--strip);
  z-index:41;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--ink);
  color:var(--paper);
  font-size:16px;
  letter-spacing:.22em;
  border-bottom:1px solid rgba(245,230,200,.2);
}
.strip span{
  padding:0 12px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

/* 左侧竖排栏 */
.rail{
  position:fixed;
  top:var(--strip);bottom:0;left:0;
  width:var(--rail);
  z-index:40;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:10px;
  padding:14px 0;
  overflow-y:auto;
  background:var(--ink);
  color:var(--paper);
}
.rail ol{
  list-style:none;
  margin:0;padding:0;
  width:100%;
  display:flex;
  flex-direction:column;
  gap:2px;
}
.rail a{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:10px 4px;
  border-radius:12px;
  color:var(--paper);
  text-decoration:none;
  font-size:16px;
  line-height:1.25;
  text-align:center;
  letter-spacing:.02em;
}
.rail a:hover{background:rgba(245,230,200,.16);color:#fff}
.brand{
  width:100%;
  min-height:44px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  margin:6px 0;
  padding:12px 4px;
  color:var(--tan);
  text-decoration:none;
  font-family:var(--serif);
  font-size:20px;
  font-weight:700;
  line-height:1.15;
  letter-spacing:.05em;
  text-align:center;
  border-top:1px solid rgba(245,230,200,.3);
  border-bottom:1px solid rgba(245,230,200,.3);
}
.brand-mark{display:block;width:46px;height:auto;border-radius:6px}

/* 主区 */
main{
  margin-left:var(--rail);
  padding:calc(var(--strip) + 26px) 34px 0 24px;
  max-width:1200px;
  display:grid;
  grid-template-columns:225px minmax(0,1fr);
  gap:0 34px;
}

/* 左栏目录卡 */
.side{
  align-self:start;
  position:sticky;
  top:calc(var(--strip) + 26px);
  background:var(--paper2);
  border-radius:var(--r);
  padding:20px 16px 18px;
}
.side small{
  display:block;
  font-family:var(--sans);
  font-size:16px;
  letter-spacing:.2em;
  color:var(--ink2);
}
.side h2{
  font-family:var(--serif);
  font-size:22px;
  margin:4px 0 14px;
  letter-spacing:.04em;
}
.side ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.side a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:6px 10px;
  border-radius:12px;
  font-size:16px;
  line-height:1.3;
  color:var(--ink);
  text-decoration:none;
}
.side a:hover{background:rgba(38,33,23,.09)}

/* 正文 */
article{min-width:0;padding-bottom:64px}
article > section{scroll-margin-top:calc(var(--strip) + 26px)}
article > section:not(.hero){
  max-width:66ch;
  padding:46px 0;
  border-top:1px solid rgba(38,33,23,.18);
}
article h2{
  font-family:var(--serif);
  font-size:clamp(25px,2.6vw,34px);
  line-height:1.3;
  margin:.1em 0 .7em;
}
article h3{font-family:var(--serif);font-size:22px;margin:1.6em 0 .4em}
article p{margin:0 0 1.05em}
article ul,article ol{margin:0 0 1.1em;padding-left:1.4em}
article li{margin:.3em 0}
article a{color:#6b4a22;text-decoration:underline;text-underline-offset:3px}
article a:hover{color:var(--ink)}
article blockquote{
  margin:1.4em 0;
  padding:6px 0 6px 20px;
  border-left:3px solid var(--tan);
  font-family:var(--serif);
  font-size:19px;
  color:var(--ink2);
}
article img{height:auto;border-radius:14px;filter:sepia(.2) saturate(.85) contrast(1.04)}
article hr{border:0;border-top:1px solid rgba(38,33,23,.18);margin:2em 0}
article table{width:100%;border-collapse:collapse;font-size:16px}
article th,article td{padding:10px 12px;text-align:left;border-bottom:1px solid rgba(38,33,23,.16)}

/* 头图区 */
.hero{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);
  gap:40px;
  align-items:center;
  min-height:calc(100vh - var(--strip) - 26px);
  padding:40px 0 70px;
}
.hero--solo{grid-template-columns:minmax(0,1fr);max-width:44rem;margin:0 auto}
.hero::after{
  content:'';
  position:absolute;
  inset:-10% -6%;
  z-index:0;
  pointer-events:none;
  mix-blend-mode:soft-light;
  background:
    radial-gradient(55% 70% at 8% 6%,rgba(212,165,116,.78),transparent 62%),
    radial-gradient(46% 58% at 94% 88%,rgba(255,238,196,.82),transparent 66%);
  animation:leak 14s ease-in-out infinite alternate;
}
@keyframes leak{
  from{opacity:.5;transform:translate3d(-1%,0,0)}
  to{opacity:.95;transform:translate3d(1%,1%,0)}
}
.hero > *{position:relative;z-index:1}
.shot{margin:0;display:flex;justify-content:center}
.polaroid{
  max-width:430px;
  padding:14px 14px 44px;
  border-radius:8px;
  background:#fbf4e5;
  box-shadow:0 22px 44px -20px rgba(38,33,23,.6);
  transform:rotate(-2.4deg);
  animation:wobble 9s ease-in-out infinite;
}
.polaroid img{display:block;width:100%;border-radius:4px;filter:sepia(.3) saturate(.8) contrast(1.07)}
@keyframes wobble{
  0%,100%{transform:rotate(-2.4deg) translateY(0)}
  50%{transform:rotate(-1.2deg) translateY(-8px)}
}
.hero-txt{
  position:relative;
  max-width:36rem;
  margin:0 auto;
  padding:26px 8px 0;
  text-align:center;
}
.badge{
  position:absolute;
  top:-4px;left:50%;
  transform:translateX(-50%) rotate(-3deg);
  padding:6px 16px;
  border-radius:999px;
  background:var(--tan);
  color:var(--ink);
  font-size:16px;
  font-weight:600;
  letter-spacing:.14em;
  white-space:nowrap;
  animation:bob 6s ease-in-out infinite;
}
@keyframes bob{
  0%,100%{transform:translateX(-50%) rotate(-3deg) translateY(0)}
  50%{transform:translateX(-50%) rotate(-2deg) translateY(-6px)}
}
h1{
  font-family:var(--serif);
  font-size:clamp(34px,4.4vw,58px);
  line-height:1.16;
  letter-spacing:-.01em;
  margin:18px 0;
}
.lede{margin:0 0 26px;font-size:17px;line-height:1.8;color:var(--ink2)}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:48px;
  padding:12px 30px;
  border-radius:999px;
  background:var(--ink);
  color:var(--paper);
  font-size:17px;
  letter-spacing:.08em;
  text-decoration:none;
  transition:transform .25s ease,background .25s ease;
}
.btn:hover{background:#3b3223;transform:translateY(-2px)}

/* 页脚 */
footer{
  margin-top:20px;
  padding:56px 34px 22px calc(var(--rail) + 24px);
  background:var(--ink);
  color:var(--paper);
}
.foot-top{
  display:grid;
  grid-template-columns:1.5fr 1fr .9fr;
  gap:32px;
  max-width:1100px;
  align-items:start;
}
.giant{
  margin:0;
  font-family:var(--serif);
  font-size:clamp(44px,6vw,88px);
  line-height:.96;
  letter-spacing:-.02em;
  color:var(--tan);
}
.f-k{display:block;margin-bottom:6px;font-size:16px;letter-spacing:.2em;color:var(--tan)}
address{font-style:normal;font-size:16px;line-height:1.7;color:#e8d7b6;word-break:break-all}
footer ul{list-style:none;margin:0;padding:0}
footer li a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  color:var(--paper);
  font-size:16px;
  text-decoration:none;
}
footer li a:hover{color:var(--tan);text-decoration:underline;text-underline-offset:4px}
.foot-bar{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  max-width:1100px;
  margin:36px 0 0;
  padding-top:14px;
  border-top:1px solid rgba(245,230,200,.22);
  font-size:16px;
  color:#d9c8a8;
}
.foot-bar a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  color:var(--paper);
  text-decoration:none;
}
.foot-bar a:hover{color:var(--tan)}
.fb-links{display:flex;flex-wrap:wrap;gap:18px}

/* 回到顶部 */
.to-top{
  position:fixed;
  right:18px;bottom:18px;
  z-index:45;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:10px 16px;
  border-radius:999px;
  background:var(--tan);
  color:var(--ink);
  font-size:16px;
  letter-spacing:.06em;
  text-decoration:none;
  box-shadow:0 10px 24px -12px rgba(38,33,23,.75);
}

/* 入场 */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

@media (max-width:1080px){
  main{grid-template-columns:190px minmax(0,1fr);gap:0 22px;padding-right:22px}
  .hero{gap:26px}
}

@media (max-width:900px){
  .strip{position:sticky;height:auto;padding:6px 12px;font-size:16px;letter-spacing:.14em}
  .rail{
    position:sticky;
    top:0;bottom:auto;
    width:auto;
    flex-direction:row;
    flex-wrap:wrap;
    justify-content:center;
    align-items:center;
    gap:4px;
    padding:4px 8px 6px;
    overflow:visible;
  }
  .rail ol{
    flex-direction:row;
    flex-wrap:nowrap;
    justify-content:flex-start;
    width:100%;
    gap:2px;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
  }
  .rail ol::-webkit-scrollbar{display:none}
  .rail a{min-height:44px;padding:8px 10px;border-radius:10px;white-space:nowrap}
  .brand{order:-1;flex-basis:100%;min-height:44px;margin:0;padding:4px 0 6px;border:0;font-size:19px}
  main{
    margin-left:0;
    padding:16px 18px 0;
    grid-template-columns:minmax(0,1fr);
  }
  .side{order:-1;position:static;margin-bottom:18px;padding:12px 12px 10px;border-radius:14px}
  .side small{font-size:16px;letter-spacing:.14em}
  .side h2{font-size:18px;margin:2px 0 8px}
  .side ul{
    flex-direction:row;
    gap:6px;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
  }
  .side ul::-webkit-scrollbar{display:none}
  .side a{
    min-height:40px;
    padding:6px 12px;
    white-space:nowrap;
    background:rgba(38,33,23,.07);
    border-radius:10px;
  }
  .hero{grid-template-columns:minmax(0,1fr);min-height:0;gap:22px;padding:10px 0 30px}
  .hero-txt{order:-1;padding:8px 4px 0}
  .badge{
    position:static;
    display:inline-block;
    transform:rotate(-2deg);
    margin:0 0 10px;
    animation:none;
  }
  h1{font-size:clamp(30px,8.4vw,40px);margin:6px 0 12px}
  .lede{font-size:16px;margin-bottom:20px}
  .polaroid{max-width:330px;padding:10px 10px 30px;transform:rotate(-1.4deg)}
  section{padding-bottom:40px}
  section > article:not(.hero){padding:30px 0}
  footer{padding:38px 18px 18px;margin-top:36px}
  .foot-top{grid-template-columns:minmax(0,1fr);gap:22px}
  .foot-bar{flex-direction:column;align-items:flex-start;gap:8px}
  .to-top{right:12px;bottom:12px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  body::before,
  .hero::after,
  .polaroid,
  .badge{animation:none}
  .reveal{opacity:1;transform:none;transition:none}
  .btn:hover{transform:none}
}

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