:root{
  --paper:#f5e6c8;
  --paper-hi:#fbf2df;
  --brass:#d4a574;
  --ink:#262117;
  --ink-soft:#5b4c37;
  --line:rgba(38,33,23,.22);
  --dash:rgba(38,33,23,.18);
  --serif:'Crimson Pro','Songti SC','Noto Serif SC',Georgia,'Times New Roman',serif;
  --sans:'Atkinson Hyperlegible',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --max:1180px;
}

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

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

body{
  margin:0;
  background-color:var(--paper);
  background-image:radial-gradient(circle at 22% 12%,rgba(255,255,255,.5),transparent 58%);
  color:var(--ink);
  font-family:var(--serif);
  font-size:17px;
  line-height:1.8;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

body::before{
  content:"";
  position:fixed;
  inset:-10%;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(38% 46% at 10% 4%,rgba(255,242,212,.9),transparent 70%),
    radial-gradient(30% 40% at 90% 20%,rgba(212,165,116,.55),transparent 72%),
    radial-gradient(46% 42% at 72% 94%,rgba(206,138,88,.34),transparent 76%);
  filter:blur(3px);
  animation:leak 26s ease-in-out infinite alternate;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:70;
  pointer-events:none;
  opacity:.17;
  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='0.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
}

@keyframes leak{
  from{transform:translate3d(0,0,0) scale(1)}
  to{transform:translate3d(-2%,1.6%,0) scale(1.07)}
}

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

/* ---------- 顶栏 ---------- */

.top{
  position:sticky;
  top:0;
  z-index:50;
  background:linear-gradient(180deg,rgba(245,230,200,.97),rgba(245,230,200,.84));
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}

.top-rail{
  display:flex;
  align-items:center;
  gap:.5rem;
  max-width:var(--max);
  margin:0 auto;
  padding:.5rem 1rem;
}

.burger{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:58px;
  min-height:44px;
  padding:.3rem .4rem;
  border:1px solid var(--line);
  border-radius:8px;
  background:transparent;
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  letter-spacing:.1em;
  cursor:pointer;
}

.burger:hover{border-color:var(--ink)}

.top-nav{
  flex:1 1 auto;
  min-width:0;
}

.top-nav ul{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:.1rem;
  margin:0;
  padding:0;
  list-style:none;
}

.top-nav a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:.35rem .62rem;
  border-radius:8px;
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  letter-spacing:.03em;
  text-decoration:none;
}

.top-nav a:hover{background:rgba(38,33,23,.07)}

.top-nav .brand a{
  font-family:var(--serif);
  font-size:1.3rem;
  font-weight:700;
  letter-spacing:.16em;
  padding:.35rem .9rem;
  border-left:1px solid var(--line);
  border-right:1px solid var(--line);
  border-radius:0;
}

.top-contact{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:.3rem .8rem;
  border:1px solid var(--brass);
  border-radius:999px;
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  text-decoration:none;
}

.top-contact:hover{background:var(--brass)}

/* ---------- 头图 ---------- */

.wrap{position:relative;z-index:1}

.hero{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:.8rem;
  min-height:45vh;
  padding:3rem 1.2rem 2.6rem;
  text-align:center;
}

.hero h1{
  margin:0;
  font-size:clamp(2.3rem,7.2vw,4.6rem);
  line-height:1.1;
  letter-spacing:.06em;
  font-weight:600;
  color:var(--ink);
  text-shadow:0 1px 0 rgba(255,255,255,.55);
  animation:vhs 7s ease-in-out infinite;
}

@keyframes vhs{
  0%,100%{transform:translateX(0) skewX(0)}
  42%{transform:translateX(-1px) skewX(-.55deg)}
  68%{transform:translateX(1px) skewX(.35deg)}
}

.lede{
  max-width:40ch;
  margin:0;
  color:var(--ink-soft);
  font-size:1.02rem;
  line-height:1.75;
}

/* ---------- 主体分栏 ---------- */

.board{
  display:grid;
  grid-template-columns:248px minmax(0,1fr);
  gap:2.4rem;
  align-items:start;
  max-width:var(--max);
  margin:0 auto;
  padding:0 1.2rem 3rem;
}

.rail{
  position:sticky;
  top:82px;
  padding:1rem 1rem 1.4rem;
  border:1px dashed var(--dash);
  border-radius:10px;
  background:rgba(255,249,234,.5);
  box-shadow:0 10px 26px rgba(38,33,23,.08);
}

.polaroid{
  margin:0 0 1.3rem;
  padding:.55rem .55rem 2rem;
  background:var(--paper-hi);
  border:1px solid var(--line);
  box-shadow:0 12px 26px rgba(38,33,23,.2);
  transform:rotate(-1.6deg);
  transition:transform .5s ease;
}

.polaroid:hover{transform:rotate(.4deg) scale(1.02)}

.polaroid-img{
  display:block;
  width:100%;
  filter:sepia(.34) contrast(1.06) saturate(.82);
}

.polaroid figcaption{
  padding-top:.5rem;
  text-align:center;
  font-size:.92rem;
  letter-spacing:.16em;
  color:#7a6749;
}

.rail h2{
  margin:0 0 .2rem;
  color:#7a6749;
  font-family:var(--sans);
  font-size:1rem;
  font-weight:400;
  letter-spacing:.24em;
}

.rail hr,
.cta hr{
  border:0;
  height:1px;
  margin:.45rem 0 1rem;
  background:linear-gradient(90deg,var(--ink),transparent);
  opacity:.42;
}

.rail nav ul{
  display:flex;
  flex-direction:column;
  margin:0;
  padding:0;
  list-style:none;
}

.rail nav a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:.28rem .15rem;
  border-bottom:1px dotted var(--dash);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  text-decoration:none;
  transition:padding .25s ease,color .25s ease;
}

.rail nav a:hover{color:#8a4a1f;padding-left:.45rem}

/* ---------- 正文 ---------- */

.prose{
  min-width:0;
  font-size:17.5px;
  line-height:1.85;
}

.prose section{
  scroll-margin-top:100px;
  padding:1.6rem 0 2rem;
  border-bottom:1px solid var(--dash);
}

.prose section:last-child{border-bottom:0;padding-bottom:.6rem}

.prose h2{
  margin:0 0 .7rem;
  font-size:clamp(1.5rem,3.4vw,2rem);
  line-height:1.28;
  letter-spacing:.02em;
  color:var(--ink);
}

.prose h3{
  margin:1.5rem 0 .5rem;
  font-size:1.2rem;
  line-height:1.4;
}

.prose h2::after{
  content:"";
  display:block;
  width:52px;
  height:2px;
  margin-top:.5rem;
  background:var(--brass);
}

.prose p{margin:0 0 1rem}

.prose a{
  color:#8a4a1f;
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}

.prose a:hover{background:rgba(212,165,116,.35)}

.prose ul,
.prose ol{margin:0 0 1rem;padding-left:1.35rem}

.prose li{margin:.3rem 0}

.prose blockquote{
  margin:1.2rem 0;
  padding:.7rem 1rem;
  border-left:3px solid var(--brass);
  background:rgba(255,255,255,.32);
  color:#4a3d2b;
  font-style:italic;
}

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

.prose figure{margin:1.2rem 0}

.prose figcaption{
  font-size:.9rem;
  color:#7a6749;
  letter-spacing:.06em;
}

.prose img,
.prose figure img{filter:sepia(.3) contrast(1.05) saturate(.84)}

.prose hr{
  border:0;
  height:1px;
  margin:1.1rem 0;
  background:linear-gradient(90deg,var(--dash),transparent);
}

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

.prose th,
.prose td{
  padding:.5rem .6rem;
  border-bottom:1px solid var(--dash);
  text-align:left;
}

/* ---------- 页脚 ---------- */

.colophon{
  position:relative;
  z-index:1;
  margin-top:2.2rem;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(38,33,23,.05),rgba(38,33,23,.13));
}

.cta{
  max-width:var(--max);
  margin:0 auto;
  padding:2.6rem 1.2rem 2rem;
  text-align:center;
}

.cta h2{
  margin:0;
  font-size:clamp(1.9rem,6vw,3.2rem);
  font-weight:600;
  letter-spacing:.14em;
}

.cta hr{
  max-width:240px;
  margin:.9rem auto 1.1rem;
  background:linear-gradient(90deg,transparent,var(--ink),transparent);
}

.cta-go{
  display:inline-flex;
  align-items:center;
  min-height:46px;
  padding:.4rem 1.5rem;
  border:1px solid var(--ink);
  border-radius:999px;
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  letter-spacing:.08em;
  text-decoration:none;
  transition:background .25s ease,color .25s ease;
}

.cta-go:hover{background:var(--ink);color:var(--paper)}

.colophon-grid{
  display:grid;
  grid-template-columns:1.25fr 1fr;
  gap:1.6rem;
  max-width:var(--max);
  margin:0 auto;
  padding:0 1.2rem 1.6rem;
  border-top:1px solid var(--dash);
}

.colophon address{
  padding-top:1.2rem;
  font-style:normal;
}

.colophon address strong{
  display:block;
  margin-bottom:.4rem;
  font-size:1.35rem;
  font-weight:600;
  letter-spacing:.12em;
}

.colophon address p{
  max-width:38ch;
  margin:0;
  color:var(--ink-soft);
  font-size:16px;
  line-height:1.7;
}

.colophon-links{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:.1rem .8rem;
  margin:0;
  padding:1.2rem 0 0;
  list-style:none;
}

.colophon-links a{
  display:flex;
  align-items:center;
  min-height:40px;
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  text-decoration:none;
}

.colophon-links a:hover{color:#8a4a1f}

.copyright{
  max-width:var(--max);
  margin:0 auto;
  padding:1rem 1.2rem 2rem;
  color:#7a6749;
  font-family:var(--sans);
  font-size:15px;
  letter-spacing:.12em;
}

/* ---------- 全屏遮罩菜单 ---------- */

.veil{
  position:fixed;
  inset:0;
  z-index:90;
  display:flex;
  flex-direction:column;
  padding:1.1rem;
  background:rgba(38,33,23,.96);
  color:var(--paper);
  opacity:0;
  visibility:hidden;
  transition:opacity .32s ease,visibility .32s ease;
}

.veil.open{opacity:1;visibility:visible}

.veil-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  font-family:var(--serif);
  font-size:1.15rem;
  letter-spacing:.22em;
}

.veil-close{
  min-height:44px;
  padding:.3rem 1.1rem;
  border:1px solid rgba(245,230,200,.45);
  border-radius:999px;
  background:transparent;
  color:var(--paper);
  font-family:var(--sans);
  font-size:16px;
  cursor:pointer;
}

.veil-close:hover{background:rgba(245,230,200,.16)}

.veil nav{
  width:100%;
  max-width:520px;
  margin:auto;
}

.veil ul{
  display:flex;
  flex-direction:column;
  margin:0;
  padding:0;
  list-style:none;
}

.veil a{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:54px;
  border-bottom:1px solid rgba(245,230,200,.18);
  color:var(--paper);
  font-family:var(--serif);
  font-size:1.28rem;
  letter-spacing:.24em;
  text-decoration:none;
}

.veil a:hover{color:var(--brass)}

/* ---------- 滚动出现 ---------- */

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

html.reveal-on .reveal.in{
  opacity:1;
  transform:none;
}

/* ---------- 断点 ---------- */

@media (max-width:960px){
  .top-nav .brand a{font-size:1.2rem;padding:.35rem .6rem}
  .top-nav a{padding:.35rem .45rem}
}

@media (max-width:860px){
  .top-nav ul li:not(.brand){display:none}
  .top-contact{display:none}
  .top-nav .brand a{border-left:0;border-right:0}
  .board{grid-template-columns:1fr;gap:1.6rem}
  .rail{position:static;top:auto}
  .rail nav ul{display:grid;grid-template-columns:1fr 1fr;gap:0 .8rem}
  .colophon-grid{grid-template-columns:1fr;gap:.6rem}
  .cta{padding:2rem 1.2rem 1.4rem}
}

@media (max-width:420px){
  .hero{padding:2.2rem 1rem 2rem;min-height:42vh}
  .board{padding:0 1rem 2.4rem}
  .rail nav ul{grid-template-columns:1fr}
  .colophon-links{grid-template-columns:1fr}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body::before,
  .hero h1,
  .polaroid,
  .rail nav a,
  .cta-go,
  .top-nav a{animation:none;transition:none}
  html.reveal-on .reveal{opacity:1;transform:none}
}

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