:root{
  --cream:#f5e6c8;
  --cream-2:#efdcb9;
  --cream-3:#e6d0a5;
  --card:#f8eed6;
  --caramel:#d4a574;
  --ink:#262117;
  --ink-soft:#4c4232;
  --ink-fade:#6f6249;
  --line:rgba(38,33,23,.16);
  --shadow:0 16px 34px -22px rgba(38,33,23,.7);
  --mono:"Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:"Exo","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}

*{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:1.75;
  color:var(--ink);
  background-color:var(--cream);
  background-image:radial-gradient(130% 80% at 50% -10%,#f9ecd6,var(--cream) 58%);
  background-attachment:fixed;
}

img{max-width:100%;height:auto}
a{color:inherit}
p{margin:0}
ul,menu{margin:0;padding:0;list-style:none}

:focus-visible{
  outline:2px solid var(--ink);
  outline-offset:3px;
  border-radius:6px;
}

/* ---------- 胶片颗粒 / 漏光 ---------- */
.grain{
  position:fixed;
  inset:0;
  z-index:9;
  pointer-events:none;
  opacity:.2;
  mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='g'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='160' height='160' filter='url(%23g)' opacity='0.55'/></svg>");
  animation:grainShift 1.3s steps(3) infinite;
}
@keyframes grainShift{
  0%{transform:translate(0,0)}
  33%{transform:translate(-2px,1px)}
  66%{transform:translate(1px,-2px)}
  100%{transform:translate(0,0)}
}

.leak{
  position:fixed;
  inset:0;
  z-index:8;
  pointer-events:none;
  background:
    radial-gradient(58% 42% at 92% 4%,rgba(212,165,116,.55),transparent 68%),
    radial-gradient(42% 34% at 3% 94%,rgba(245,230,200,.85),transparent 70%);
  animation:leakPulse 17s ease-in-out infinite alternate;
}
@keyframes leakPulse{
  from{opacity:.32}
  to{opacity:.8}
}

/* ---------- 页头 ---------- */
.site-head{
  position:sticky;
  top:0;
  z-index:20;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:10px clamp(14px,4vw,40px);
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#f6e8cc 72%,rgba(246,232,204,.88));
  backdrop-filter:blur(3px);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  color:var(--ink);
  text-decoration:none;
  font-family:var(--mono);
  letter-spacing:.02em;
}
.brand img{
  display:block;
  border-radius:8px;
  filter:sepia(.28) contrast(1.05) saturate(.9);
}
.brand-name{font-size:16px;font-weight:600}
.dot{
  width:16px;
  height:16px;
  border-radius:50%;
  background:var(--caramel);
  box-shadow:inset 0 0 0 4px var(--ink);
}

.nav{display:flex;align-items:center}
.menu{position:relative}
.menu>summary{
  list-style:none;
  display:none;
  cursor:pointer;
  font-size:16px;
  letter-spacing:.08em;
}
.menu>summary::-webkit-details-marker{display:none}

.menu>menu{
  display:flex;
  flex-wrap:wrap;
  gap:2px;
}
.menu>menu a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 11px;
  font-size:16px;
  color:var(--ink-soft);
  text-decoration:none;
  border-radius:10px;
  background-image:linear-gradient(var(--caramel),var(--caramel));
  background-repeat:no-repeat;
  background-size:0% 2px;
  background-position:50% 76%;
  transition:background-size .25s ease,color .2s ease;
}
.menu>menu a:hover,
.menu>menu a:focus-visible{
  color:var(--ink);
  background-size:72% 2px;
}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);
  gap:clamp(20px,4vw,56px);
  align-items:center;
  min-height:70vh;
  max-width:1140px;
  margin:0 auto;
  padding:clamp(30px,6vw,58px) clamp(18px,4vw,44px) clamp(56px,8vw,88px);
}
.hero::after{
  content:'';
  position:absolute;
  left:0;
  right:0;
  bottom:18px;
  height:13px;
  transform:skewY(-.7deg);
  transform-origin:left bottom;
  opacity:.9;
  background:repeating-linear-gradient(90deg,var(--caramel) 0 22px,var(--ink) 22px 26px);
}

.art{
  margin:0;
  justify-self:start;
  animation:track 7s ease-in-out infinite;
}
@keyframes track{
  0%,92%,100%{transform:none}
  94%{transform:translateX(2px) skewX(-.5deg)}
  96%{transform:translateX(-1px)}
}

.frame{
  position:relative;
  width:min(300px,58vw);
  aspect-ratio:4 / 5;
  padding:12px 12px 34px;
  border-radius:6px;
  background:#fbf3e0;
  box-shadow:var(--shadow);
  transform:rotate(-2.2deg);
  filter:sepia(.16) contrast(1.05) saturate(.9);
}
.frame::before{
  content:'';
  position:absolute;
  top:-11px;
  left:50%;
  width:74px;
  height:20px;
  transform:translateX(-50%) rotate(-3deg);
  background:rgba(212,165,116,.78);
  box-shadow:0 3px 7px rgba(38,33,23,.15);
}
.frame::after{
  content:'';
  position:absolute;
  left:12px;
  right:12px;
  bottom:11px;
  height:13px;
  border-radius:2px;
  opacity:.5;
  background:repeating-linear-gradient(90deg,var(--caramel) 0 8px,transparent 8px 16px);
}

.snap{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  border-radius:2px;
  filter:sepia(.3) contrast(1.06) saturate(.82);
}
.snap-ph{
  display:block;
  width:100%;
  height:100%;
  border-radius:2px;
  background:linear-gradient(150deg,var(--cream-3),var(--caramel) 46%,#8a6a45);
}

.art figcaption{
  margin-top:10px;
  font-family:var(--mono);
  font-size:14px;
  letter-spacing:.1em;
  color:var(--ink-fade);
  text-align:left;
  transform:rotate(-1.2deg);
}

.hero-copy{text-align:right}
.hero-copy h1{
  margin:0;
  font-size:clamp(29px,5.4vw,54px);
  line-height:1.16;
  font-weight:600;
  letter-spacing:.005em;
}
.lead{
  margin-top:14px;
  font-size:17px;
  line-height:1.8;
  color:var(--ink-soft);
}

/* ---------- 正文区 ---------- */
.stage{
  display:grid;
  grid-template-columns:196px minmax(0,1fr);
  gap:clamp(18px,3vw,40px);
  align-items:start;
  max-width:1140px;
  margin:0 auto;
  padding:clamp(10px,3vw,26px) clamp(16px,4vw,40px) clamp(44px,6vw,76px);
}

.rail{
  position:sticky;
  top:88px;
  padding:14px 12px 16px;
  border:1px solid var(--line);
  border-radius:18px;
  background:var(--card);
  box-shadow:var(--shadow);
}
.kicker{
  display:block;
  margin-bottom:6px;
  font-family:var(--mono);
  font-size:14px;
  letter-spacing:.2em;
  color:#8a6a45;
}
.rail-title{
  margin:0 0 10px;
  font-size:17px;
  letter-spacing:.08em;
}
.rail-list{display:grid;gap:2px}
.rail-list a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:0 10px;
  border-left:2px solid transparent;
  border-radius:10px;
  font-size:16px;
  color:var(--ink-soft);
  text-decoration:none;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.rail-list a:hover,
.rail-list a:focus-visible{
  background:var(--cream-2);
  color:var(--ink);
  border-left-color:var(--caramel);
}

.prose{min-width:0}
.prose div{
  margin-bottom:clamp(18px,3vw,30px);
  padding:clamp(18px,3.4vw,34px);
  border:1px solid var(--line);
  border-radius:18px;
  background:var(--card);
  box-shadow:var(--shadow);
  scroll-margin-top:92px;
}
.prose div:last-child{margin-bottom:0}
.prose div>*+*{margin-top:1em}

.prose h2{
  margin:0;
  font-size:clamp(21px,3vw,27px);
  line-height:1.36;
  letter-spacing:.008em;
}
.prose h3{
  margin:0;
  font-size:19px;
  line-height:1.5;
}
.prose p,
.prose li{
  font-size:17px;
  line-height:1.85;
  color:var(--ink-soft);
}
.prose ul,.prose ol{padding-left:1.25em}
.prose ul{list-style:square}
.prose ol{list-style:decimal}
.prose li+li{margin-top:.35em}
.prose a{
  color:#7a5325;
  text-decoration:underline;
  text-underline-offset:3px;
}
.prose a:hover{color:var(--ink)}
.prose strong{color:var(--ink)}
.prose small{
  display:block;
  margin-bottom:6px;
  font-family:var(--mono);
  font-size:14px;
  letter-spacing:.2em;
  color:#8a6a45;
}
.prose figure,
.prose aside{
  margin:1.1em 0;
  padding:12px 14px;
  border-left:3px solid var(--caramel);
  border-radius:12px;
  background:var(--cream-2);
}
.prose blockquote{
  margin:1.1em 0;
  padding:10px 16px;
  border-left:3px solid var(--ink);
  font-style:normal;
  color:var(--ink-soft);
  background:rgba(245,230,200,.6);
  border-radius:12px;
}
.prose img{border-radius:12px}
.prose table{
  width:100%;
  border-collapse:collapse;
  font-size:16px;
}
.prose th,.prose td{
  padding:8px 10px;
  border-bottom:1px solid var(--line);
  text-align:left;
}

/* ---------- 页脚 ---------- */
.site-foot{
  margin-top:12px;
  padding:clamp(28px,5vw,50px) clamp(18px,4vw,40px) 18px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(239,220,185,.55),#ecdcbd);
}
.foot-cols{
  display:grid;
  grid-template-columns:1.4fr 1.05fr 1fr .7fr;
  gap:clamp(18px,3vw,36px);
  max-width:1140px;
  margin:0 auto;
}
.foot-brand{
  margin-bottom:8px;
  font-family:var(--mono);
  font-size:16px;
  font-weight:600;
  letter-spacing:.04em;
}
.foot-desc,
address{
  font-size:16px;
  line-height:1.8;
  color:var(--ink-soft);
  font-style:normal;
}
.foot-links{display:grid;gap:2px}
.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:16px;
  color:var(--ink-soft);
  text-decoration:none;
  padding:0 2px;
}
.foot-links a:hover,
.foot-links a:focus-visible{color:var(--ink);text-decoration:underline}
.foot-base{
  max-width:1140px;
  margin:24px auto 0;
  padding-top:14px;
  border-top:1px solid var(--line);
  text-align:center;
  font-size:16px;
  color:var(--ink-fade);
  letter-spacing:.04em;
}

/* ---------- 滚动显现 ---------- */
.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .65s ease,transform .65s ease;
}
.reveal.in{
  opacity:1;
  transform:none;
}

/* ---------- 断点 ---------- */
@media (max-width:900px){
  .menu>summary{
    display:inline-flex;
    align-items:center;
    min-height:44px;
    padding:0 15px;
    border:1px solid var(--line);
    border-radius:999px;
    background:var(--cream-2);
  }
  .menu>menu{
    position:absolute;
    top:calc(100% + 8px);
    right:0;
    flex-direction:column;
    flex-wrap:nowrap;
    gap:1px;
    min-width:210px;
    padding:8px;
    border:1px solid var(--line);
    border-radius:14px;
    background:#f8eed6;
    box-shadow:var(--shadow);
  }
  .menu>menu a{
    width:100%;
    min-height:44px;
    padding:0 14px;
    border-radius:10px;
  }
  .menu>menu a:hover,
  .menu>menu a:focus-visible{
    background-color:var(--cream-2);
    background-size:0% 2px;
  }

  .hero{
    grid-template-columns:1fr;
    min-height:0;
    padding-top:26px;
    padding-bottom:56px;
    gap:26px;
  }
  .art{justify-self:center}
  .hero-copy{text-align:right}
  .art figcaption{text-align:center}

  .stage{grid-template-columns:1fr}
  .rail{position:static;margin-bottom:18px}
  .rail-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .rail-list a{border-left:0;border-bottom:2px solid transparent;padding:0 8px}
  .rail-list a:hover,
  .rail-list a:focus-visible{border-left-color:transparent;border-bottom-color:var(--caramel)}

  .foot-cols{grid-template-columns:1fr 1fr}
  .foot-brand{font-size:16px}
}

@media (max-width:560px){
  body{font-size:17px}
  .brand-name{font-size:16px}
  .rail-list{grid-template-columns:1fr}
  .foot-cols{grid-template-columns:1fr}
  .hero::after{bottom:10px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

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