@import url('https://fonts.googleapis.com/css2?family=Abril+Fatface&family=Merriweather:wght@300;400;700&display=swap');

:root{
  --ink:#172623;
  --ink-soft:#2f4239;
  --clay:#c67b5c;
  --clay-deep:#a3593b;
  --sand:#d4c4a8;
  --paper:#f4ece1;
  --paper-2:#efe3d2;
  --teal:#5cc6b0;
  --olive:#6b7b3c;
  --line:rgba(23,38,35,.14);
  --cream:#f8f1e5;
}

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

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

body{
  margin:0;
  background:var(--paper);
  color:var(--ink-soft);
  font-family:Merriweather,Georgia,"Songti SC",serif;
  font-size:17px;
  font-weight:400;
  line-height:1.78;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:3;
  pointer-events:none;
  opacity:.42;
  mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='g'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='140' height='140' filter='url(%23g)' opacity='0.4'/></svg>");
}

:focus-visible{outline:2px solid var(--teal);outline-offset:3px}

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

a{color:var(--clay-deep)}

/* 顶部横条 */
.topbar{
  position:sticky;
  top:0;
  z-index:40;
  background:rgba(244,236,225,.95);
  backdrop-filter:blur(7px);
  border-bottom:2px solid rgba(198,123,92,.44);
  box-shadow:0 14px 30px -26px rgba(23,38,35,.95);
}

.sitenav{
  max-width:1180px;
  margin:0 auto;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:10px;
  padding:4px 20px;
}

.nav-side{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}
.nav-l{justify-content:flex-end}
.nav-r{justify-content:flex-start}

.nav-side > li{position:relative}
.nav-side a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 12px;
  font-size:16px;
  line-height:1.3;
  color:var(--ink);
  text-decoration:none;
  border-bottom:2px solid transparent;
  transition:border-color .22s ease-out, color .22s ease-out;
}
.nav-side a:hover,
.nav-side a:focus-visible{border-bottom-color:var(--teal);color:var(--clay-deep)}

.grp > a::after{
  content:"▾";
  font-size:.72em;
  margin-left:5px;
  color:var(--clay);
}

.sub{
  position:absolute;
  top:100%;
  left:0;
  min-width:196px;
  margin:0;
  padding:6px;
  list-style:none;
  background:var(--paper-2);
  border-bottom:3px solid var(--teal);
  box-shadow:0 22px 34px -26px rgba(23,38,35,.9);
  opacity:0;
  visibility:hidden;
  transform:translateY(6px);
  transition:opacity .22s ease-out, transform .22s ease-out, visibility .22s;
}
.grp:hover .sub,
.grp:focus-within .sub{opacity:1;visibility:visible;transform:none}
.sub a{display:flex;width:100%;padding:0 12px}

.brand{
  font-family:"Abril Fatface",Georgia,serif;
  font-size:1.3rem;
  letter-spacing:.06em;
  color:var(--clay-deep);
  text-decoration:none;
  padding:9px 16px;
  white-space:nowrap;
  border-bottom:2px solid var(--sand);
}

/* 头图 */
.hero{
  position:relative;
  min-height:70vh;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  background:linear-gradient(155deg,#33463d,#172623 58%,#3b2a22);
  border-bottom:1px solid rgba(23,38,35,.2);
}

.hero-media{position:absolute;inset:0;z-index:0}

.hero-img{
  width:100%;
  height:100%;
  object-fit:cover;
  transform:scale(1.12);
  will-change:transform;
}

.hero-veil{
  position:absolute;
  inset:0;
  z-index:1;
  background:
    linear-gradient(100deg,rgba(23,38,35,.9) 0%,rgba(23,38,35,.62) 44%,rgba(23,38,35,.14) 100%),
    linear-gradient(0deg,rgba(198,123,92,.28),rgba(198,123,92,0) 55%);
}

.hero-copy{
  position:relative;
  z-index:2;
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:clamp(28px,6vw,60px) 20px clamp(56px,10vh,96px);
}

.hero-h1{
  margin:0;
  max-width:22ch;
  font-family:"Abril Fatface",Georgia,serif;
  font-weight:400;
  font-size:clamp(2.35rem,6.6vw,4.4rem);
  line-height:1.14;
  letter-spacing:.01em;
  color:var(--cream);
  text-shadow:0 14px 34px rgba(10,20,17,.6);
}

.hero-band{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:16px;
  z-index:2;
  background:linear-gradient(90deg,var(--clay) 0 46%,var(--teal) 46% 100%);
  clip-path:polygon(0 62%,100% 0,100% 100%,0 100%);
}

/* 主体 */
.page{padding:0}

.wrap{
  max-width:1180px;
  margin:0 auto;
  padding:clamp(30px,5vw,64px) 20px clamp(40px,6vw,72px);
  display:grid;
  grid-template-columns:248px minmax(0,1fr);
  gap:clamp(24px,4vw,54px);
  align-items:start;
}

.rail{
  position:sticky;
  top:104px;
  border-top:3px solid var(--clay);
  border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.34);
  padding:14px 6px 18px;
}

.rail-title{
  margin:0 0 .7rem;
  font-family:"Abril Fatface",Georgia,serif;
  font-weight:400;
  font-size:1.02rem;
  letter-spacing:.2em;
  color:var(--ink);
}
.rail-title > span{border-bottom:2px solid var(--teal);padding-bottom:3px}

.rail-nav ul{margin:0;padding:0;list-style:none}
.rail-nav a{
  display:block;
  padding:9px 4px;
  font-size:16px;
  line-height:1.4;
  color:var(--ink-soft);
  text-decoration:none;
  border-bottom:1px solid var(--line);
  transition:color .2s ease-out, padding-left .2s ease-out;
}
.rail-nav a:hover,
.rail-nav a:focus-visible{color:var(--clay-deep);padding-left:9px}

.col{min-width:0}

/* 正文 */
.prose{
  max-width:74ch;
  font-size:17px;
  line-height:1.82;
}

.prose > p{margin:0 0 1.15rem}

.prose h2{
  margin:0 0 1rem;
  padding-bottom:.45rem;
  font-family:"Abril Fatface",Georgia,serif;
  font-weight:400;
  font-size:clamp(1.6rem,3.4vw,2.25rem);
  line-height:1.24;
  letter-spacing:.01em;
  color:var(--ink);
  border-bottom:2px solid rgba(198,123,92,.5);
}
.prose h2 > span{position:relative;display:inline-block}
.prose h2 > span::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-2px;
  width:34%;
  height:3px;
  background:var(--teal);
}

.prose h3{
  margin:1.8rem 0 .7rem;
  font-family:"Abril Fatface",Georgia,serif;
  font-weight:400;
  font-size:1.24rem;
  line-height:1.35;
  color:var(--olive);
  border-bottom:1px solid rgba(107,123,60,.4);
  padding-bottom:.3rem;
}
.prose h3 > span{display:inline-block}

.prose section{
  padding-bottom:clamp(26px,4vw,44px);
  margin-bottom:clamp(26px,4vw,44px);
  border-bottom:1px dashed rgba(23,38,35,.22);
  scroll-margin-top:118px;
}
.prose section:last-child{border-bottom:0;margin-bottom:0}

.prose ul,
.prose ol{margin:0 0 1.15rem;padding-left:1.35rem}
.prose li{margin:0 0 .5rem}
.prose li::marker{color:var(--clay)}

.prose a{
  color:var(--clay-deep);
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}
.prose a:hover{color:var(--ink);text-decoration-color:var(--teal)}

.prose blockquote{
  margin:1.4rem 0;
  padding:14px 18px;
  background:rgba(212,196,168,.34);
  border-left:4px solid var(--olive);
  color:var(--ink);
}
.prose blockquote p:last-child{margin:0}

.prose figure{margin:1.4rem 0}
.prose figcaption{font-size:16px;color:#5d6b5f;padding-top:.5rem}

.prose strong{color:var(--ink)}
.prose code{
  font-family:ui-monospace,"SFMono-Regular",Menlo,monospace;
  font-size:.94em;
  background:rgba(23,38,35,.08);
  padding:1px 5px;
}
.prose table{width:100%;border-collapse:collapse;margin:1.2rem 0;font-size:16px}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:9px 10px;text-align:left}
.prose th{color:var(--ink);border-bottom:2px solid var(--clay)}

/* 页脚 */
.sitefoot{
  margin-top:clamp(24px,5vw,56px);
  background:var(--ink);
  color:#e3d9ca;
}

.cta{
  background:linear-gradient(112deg,var(--clay) 0%,var(--clay-deep) 58%,#7f4229 100%);
  padding:clamp(30px,6vw,64px) 0;
}
.cta-in{
  max-width:1180px;
  margin:0 auto;
  padding:0 20px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.cta-title{
  margin:0;
  font-family:"Abril Fatface",Georgia,serif;
  font-weight:400;
  font-size:clamp(1.8rem,4.6vw,3rem);
  line-height:1.15;
  color:var(--cream);
}
.cta-title > span{border-bottom:3px solid var(--teal);padding-bottom:5px}

.cta-btn{
  display:inline-flex;
  align-items:center;
  min-height:46px;
  padding:0 24px;
  font-size:16px;
  color:var(--cream);
  text-decoration:none;
  border:2px solid rgba(248,241,229,.85);
  transition:background .22s ease-out, color .22s ease-out;
}
.cta-btn:hover,
.cta-btn:focus-visible{background:var(--cream);color:var(--clay-deep)}

.foot-main{
  max-width:1180px;
  margin:0 auto;
  padding:clamp(32px,5vw,56px) 20px clamp(24px,4vw,40px);
  display:grid;
  grid-template-columns:1.25fr 1fr;
  gap:clamp(24px,4vw,48px);
}

.f-brand dt{
  font-family:"Abril Fatface",Georgia,serif;
  font-size:1.3rem;
  letter-spacing:.05em;
  color:var(--sand);
  padding-bottom:10px;
  border-bottom:2px solid rgba(92,198,176,.55);
  margin-bottom:12px;
}
.f-brand dd{margin:0;font-size:16px;line-height:1.72;color:#b4aa9c}

.f-cols{display:grid;grid-template-columns:1fr 1fr;gap:22px}

.f-cols dt{
  font-size:16px;
  letter-spacing:.14em;
  color:var(--teal);
  padding-bottom:8px;
  border-bottom:1px solid rgba(212,196,168,.3);
  margin-bottom:8px;
}
.f-cols dd{margin:0}
.f-cols ul{margin:0;padding:0;list-style:none}
.f-cols a{
  display:block;
  padding:8px 0;
  min-height:40px;
  font-size:16px;
  line-height:1.5;
  color:#d5cbbc;
  text-decoration:none;
}
.f-cols a:hover,
.f-cols a:focus-visible{color:var(--teal)}

.foot-bottom{
  max-width:1180px;
  margin:0 auto;
  padding:16px 20px 30px;
  border-top:1px solid rgba(212,196,168,.24);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
}
.foot-bottom p{margin:0;font-size:16px;color:#a49a8d}
.f-top{display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none}
.f-top a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 10px;
  font-size:16px;
  color:var(--sand);
  text-decoration:underline;
  text-underline-offset:3px;
}
.f-top a:hover{color:var(--teal)}

/* 出场动效 */
.js .reveal{opacity:0;transform:translateY(16px)}
.js .reveal.in{
  opacity:1;
  transform:none;
  transition:opacity .7s ease-out, transform .7s ease-out;
}
.js .rail-nav li:nth-child(2){transition-delay:.05s}
.js .rail-nav li:nth-child(3){transition-delay:.1s}
.js .rail-nav li:nth-child(4){transition-delay:.15s}
.js .rail-nav li:nth-child(5){transition-delay:.2s}
.js .rail-nav li:nth-child(6){transition-delay:.25s}
.js .rail-nav li:nth-child(7){transition-delay:.3s}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  .hero-img{transform:none}
  .sub{transition:none}
}

/* 移动端 */
@media (max-width:880px){
  .sitenav{grid-template-columns:1fr;gap:0;padding:4px 14px 8px}
  .brand{order:-1;justify-self:start;border-bottom:0;padding:10px 0;font-size:1.2rem}
  .nav-side{justify-content:flex-start}
  .nav-side a{padding:0 10px}
  .sub{
    position:static;
    opacity:1;
    visibility:visible;
    transform:none;
    min-width:0;
    padding:0 0 0 12px;
    background:transparent;
    border-bottom:0;
    border-left:2px solid rgba(92,198,176,.55);
    box-shadow:none;
  }
  .grp > a::after{color:var(--teal)}

  .hero{min-height:64vh}
  .hero-veil{background:linear-gradient(100deg,rgba(23,38,35,.92),rgba(23,38,35,.58))}
  .hero-h1{max-width:16ch}

  .wrap{grid-template-columns:minmax(0,1fr);gap:26px}
  .rail{position:static;top:auto;padding:12px 8px 14px}
  .rail-nav ul{display:grid;grid-template-columns:1fr 1fr;gap:0 12px}
  .rail-nav a{padding:8px 2px;font-size:16px}

  .foot-main{grid-template-columns:minmax(0,1fr);gap:26px}
  .cta-in{flex-direction:column;align-items:flex-start}
}

@media (max-width:420px){
  .rail-nav ul{grid-template-columns:minmax(0,1fr)}
  .nav-side a{padding:0 8px;font-size:16px}
}

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