:root{
  --cream:#f5e6c8;
  --caramel:#d4a574;
  --ink:#262117;
  --rust:#a85c33;
  --paper:#fffdf6;
  --mute:#5f4f3b;
  --font-h:'Righteous','Poppins',"PingFang SC","Microsoft YaHei",sans-serif;
  --font-b:'Poppins',-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  --pad:clamp(16px,4.5vw,54px);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip}
body{
  margin:0;overflow-x:clip;
  font-family:var(--font-b);font-size:17px;line-height:1.72;color:var(--ink);
  background:
    radial-gradient(820px 460px at 88% -8%,rgba(212,165,116,.62),transparent 62%),
    radial-gradient(620px 420px at -6% 44%,rgba(255,248,232,.95),transparent 70%),
    linear-gradient(175deg,#f8efd9 0%,#f5e6c8 55%,#eedcbe 100%);
  background-attachment:fixed;
}
body::before{
  content:"";position:fixed;inset:0;z-index:90;pointer-events:none;opacity:.42;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)' opacity='0.42'/%3E%3C/svg%3E");
}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
a:focus-visible,input:focus-visible,button:focus-visible{outline:3px solid var(--rust);outline-offset:2px}
.sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
i{font-style:normal}

/* 顶栏 */
.top{
  position:sticky;top:0;z-index:80;
  background:rgba(246,232,206,.94);
  border-bottom:2px solid var(--ink);
}
.top::after{
  content:"";position:absolute;left:0;bottom:-2px;width:32%;height:3px;
  background:linear-gradient(90deg,transparent,var(--rust),transparent);
  animation:track 8s linear infinite;
}
@keyframes track{0%{transform:translateX(-110%)}100%{transform:translateX(330%)}}
.top-row{display:flex;align-items:center;gap:10px;padding:7px var(--pad)}
.brand,.foot-mark a{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;flex:0 0 auto;
  border:2px solid var(--ink);background:var(--ink);color:var(--cream);
  text-decoration:none;
}
.mk-img{width:100%;height:100%;object-fit:cover;filter:sepia(.3) contrast(1.05)}
.mk-txt{font-family:var(--font-h);font-size:20px;line-height:1}
.nv-bar{
  display:flex;align-items:stretch;gap:2px;flex:1 1 auto;min-width:0;
  overflow-x:auto;scrollbar-width:none;
}
.nv-bar::-webkit-scrollbar{display:none}
.nv{
  display:inline-flex;align-items:center;gap:6px;flex:0 0 auto;
  min-height:44px;padding:6px 10px;
  font-size:16px;line-height:1.2;text-decoration:none;white-space:nowrap;
  border-bottom:3px solid transparent;
}
.nv i{font-size:11px;color:var(--rust)}
.nv:hover{border-bottom-color:var(--ink);background:rgba(212,165,116,.4)}
.find{
  display:flex;align-items:center;gap:6px;flex:0 0 auto;
  width:132px;padding:4px 8px;min-height:40px;
  border:2px solid var(--ink);background:var(--paper);
}
.find-ico{font-size:17px;line-height:1;color:var(--mute)}
.find input{
  width:100%;min-width:0;border:0;background:transparent;
  font-family:inherit;font-size:16px;color:var(--ink);
}
.find input:focus{outline:none}

/* 页宽 */
.wrap{max-width:1160px;margin:0 auto;padding:0 var(--pad)}

/* 首屏 */
.hero{
  position:relative;overflow:clip;
  display:grid;grid-template-columns:minmax(0,300px) minmax(0,1fr);
  gap:clamp(16px,3.4vw,44px);align-items:center;
  min-height:45vh;padding:clamp(18px,3.6vw,38px) 0;
}
.hero-copy{position:relative;text-align:right}
.ghost{
  position:absolute;right:0;top:50%;transform:translateY(-52%);
  font-family:var(--font-h);font-size:clamp(54px,12vw,148px);line-height:.78;
  color:transparent;-webkit-text-stroke:2px rgba(38,33,23,.15);
  white-space:nowrap;pointer-events:none;
}
.hero h1{
  position:relative;z-index:1;margin:0;
  font-family:var(--font-h);font-weight:400;
  font-size:clamp(30px,5.6vw,58px);line-height:1.12;letter-spacing:.5px;
}
.lede{
  position:relative;z-index:1;margin:12px 0 0;max-width:34em;
  font-size:16.5px;color:var(--mute);text-align:right;
}

/* 拍立得 */
.polaroid{
  margin:0;padding:10px 10px 28px;
  background:var(--paper);border:2px solid var(--ink);
  transform:rotate(-1.8deg);
  filter:sepia(.16) contrast(1.05) saturate(.88);
}
.roll{
  position:relative;aspect-ratio:4/5;overflow:hidden;
  background:repeating-linear-gradient(45deg,#e9d9bc,#e9d9bc 8px,#f3e7d0 8px,#f3e7d0 16px);
}
.frame{position:absolute;inset:0;opacity:0;transition:opacity .7s ease}
.frame.on{opacity:1}
.frame img{width:100%;height:100%;object-fit:cover;filter:sepia(.26) contrast(1.08) saturate(.82)}

/* 主分栏 */
.split{
  display:grid;grid-template-columns:minmax(0,1fr) 288px;
  gap:clamp(20px,4vw,54px);align-items:start;
  padding:14px 0 64px;
}
.col-main{min-width:0}

.col-main section[id]{scroll-margin-top:96px;padding:24px 0 12px;border-top:2px dashed rgba(38,33,23,.34)}
.col-main section[id]:first-child{padding-top:8px;border-top:0}
.col-main h2{
  margin:0 0 .34em;font-family:var(--font-h);font-weight:400;
  font-size:clamp(21px,2.9vw,29px);line-height:1.24;
}
.col-main h3{margin:1.5em 0 .4em;font-size:19px;line-height:1.4}
.col-main p{margin:.72em 0}
.col-main ul,.col-main ol{margin:.7em 0;padding-left:1.35em}
.col-main li{margin:.3em 0}
.col-main a{color:var(--rust);text-decoration-thickness:2px;text-underline-offset:3px}
.col-main img{border:2px solid var(--ink);background:var(--paper);padding:5px;filter:sepia(.2)}
.col-main blockquote{
  margin:1em 0;padding:10px 16px;border-left:6px solid var(--caramel);
  background:rgba(255,253,246,.7);
}
.col-main strong{background:linear-gradient(transparent 62%,rgba(212,165,116,.85) 62%)}
.col-main table{width:100%;border-collapse:collapse;font-size:16px}
.col-main th,.col-main td{border:1px solid var(--ink);padding:8px 10px;text-align:left}

hr{
  border:0;border-top:2px solid var(--ink);width:72px;margin:6px 0 18px;
}

/* 侧栏 */
.col-side{
  position:sticky;top:84px;
  border:2px solid var(--ink);background:rgba(255,253,246,.66);
  padding:14px 16px 16px;
}
.col-side h2{
  margin:0 0 .22em;font-family:var(--font-h);font-weight:400;
  font-size:19px;line-height:1.3;
}
.col-side hr{margin:0 0 12px;width:48px}
.toc{margin:0 0 14px;padding:0;list-style:none}
.toc li{margin:0 0 4px}
.toc li.hid{display:none}
.toc a{
  display:flex;align-items:center;gap:9px;min-height:44px;padding:5px 6px;
  font-size:16px;line-height:1.3;text-decoration:none;color:var(--ink);
  border-bottom:1px dashed rgba(38,33,23,.3);
}
.toc a:hover{background:rgba(212,165,116,.5)}
.toc b{
  flex:0 0 auto;min-width:24px;font-family:var(--font-h);font-weight:400;
  font-size:13px;color:var(--rust);
}
.totop{
  display:flex;align-items:center;justify-content:center;min-height:44px;
  border:2px solid var(--ink);background:var(--ink);color:var(--cream);
  font-size:16px;text-decoration:none;letter-spacing:1px;
}
.totop:hover{background:var(--rust);border-color:var(--rust)}

/* 页脚 */
.foot{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 26px;
  padding:26px clamp(16px,6vw,80px);
  border-top:3px double var(--ink);
  background:rgba(212,165,116,.3);
}
.foot-mark{flex:0 0 auto}
.foot-nav{min-width:0;flex:1 1 260px}
.foot-nav dl{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:0 14px;margin:0;
}
.foot-nav dt{margin:0;display:inline-flex}
.foot-nav dt a{
  display:inline-flex;align-items:center;min-height:44px;padding:4px 2px;
  font-size:16px;text-decoration:none;border-bottom:2px solid transparent;
}
.foot-nav dt a:hover{border-bottom-color:var(--ink)}
.foot-nav dd{
  margin:0;display:inline-flex;align-items:center;
  font-family:var(--font-h);font-size:12px;color:var(--mute);
}
.foot-copy{margin-left:auto;font-size:15px;color:var(--mute)}

/* 入场 */
@media (prefers-reduced-motion:no-preference){
  .col-main > section{animation:rise .55s cubic-bezier(.2,.8,.3,1) both}
  .col-main > section:nth-child(2){animation-delay:.05s}
  .col-main > section:nth-child(3){animation-delay:.1s}
  .col-main > section:nth-child(4){animation-delay:.15s}
  .col-main > section:nth-child(5){animation-delay:.2s}
  .col-main > section:nth-child(6){animation-delay:.25s}
  .col-main > section:nth-child(7){animation-delay:.3s}
  .col-main > section:nth-child(8){animation-delay:.35s}
  .polaroid{animation:shake .9s ease-out both .1s}
  @keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
  @keyframes shake{
    0%{transform:rotate(-4deg) translateY(6px);opacity:0}
    60%{transform:rotate(1deg) translateY(0);opacity:1}
    100%{transform:rotate(-1.8deg)}
  }
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .top::after{animation:none;width:100%;opacity:.5}
}

/* 响应 */
@media (max-width:900px){
  .split{grid-template-columns:1fr;padding-bottom:44px}
  .col-side{position:static;order:2}
  .col-main{order:1}
}
@media (max-width:720px){
  .hero{grid-template-columns:1fr;min-height:0;gap:16px;padding:16px 0 22px}
  .hero-copy{order:1;text-align:left}
  .lede{text-align:left;margin-top:9px}
  .polaroid{order:2;max-width:214px;align-self:start;transform:rotate(-1.2deg)}
  .ghost{right:auto;left:0;top:auto;bottom:-6px;transform:none;font-size:clamp(44px,15vw,72px);opacity:.85}
  .hero-copy{padding-bottom:26px}
  .find{width:96px}
  .foot{flex-direction:column;align-items:flex-start;gap:10px}
  .foot-copy{margin-left:0}
}
@media (max-width:400px){
  .find{width:66px}
  .find-ico{display:none}
}

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