@import url('https://fonts.googleapis.com/css2?family=Exo+2:wght@300;400;500;600;700&family=Orbitron:wght@400;500;600;700&display=swap');

:root{
  --ink:#172623;
  --ink-2:#31443e;
  --ink-3:#4d6058;
  --teal:#5cc6b0;
  --teal-deep:#3c9d8a;
  --sand:#d4c4a8;
  --clay:#c0755a;
  --paper:#f5edde;
  --paper-2:#e9ddc6;
  --line:rgba(23,38,35,.14);
  --glass:rgba(255,252,244,.58);
  --radius:4px;
}

*{box-sizing:border-box}

html{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  color:var(--ink);
  font-family:"Exo 2","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  background:
    radial-gradient(900px 520px at 88% -10%, rgba(92,198,176,.30), transparent 62%),
    radial-gradient(720px 460px at -12% 26%, rgba(192,117,90,.18), transparent 62%),
    linear-gradient(180deg,#f7f0e2 0%,#ece1cc 55%,#e4d7bf 100%);
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.26;
  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='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.42'/%3E%3C/svg%3E");
}

a{color:inherit}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--teal-deep);outline-offset:3px}

.page{position:relative;z-index:1;padding-left:238px}

/* 左侧固定竖排导航 */
.rail{
  position:fixed;
  top:0;
  left:0;
  z-index:6;
  width:238px;
  height:100vh;
  display:flex;
  flex-direction:column;
  gap:4px;
  padding:26px 20px 22px;
  border-right:1px solid var(--line);
  background:linear-gradient(180deg, rgba(247,240,226,.94), rgba(233,221,198,.9));
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.rail .mark{
  font-family:Orbitron,"Exo 2",system-ui,sans-serif;
  font-weight:700;
  font-size:18px;
  letter-spacing:.01em;
  line-height:1.3;
  text-decoration:none;
  color:var(--ink);
  padding:6px 0 12px;
  border-bottom:2px solid var(--teal);
  word-break:break-word;
}
.rail-list{
  display:flex;
  flex-direction:column;
  gap:2px;
  margin-top:14px;
  flex:1 1 auto;
  overflow-y:auto;
}
.rail-list a{
  display:block;
  min-height:42px;
  padding:10px 10px;
  border-radius:var(--radius);
  border-left:2px solid transparent;
  font-size:16px;
  line-height:1.4;
  text-decoration:none;
  color:var(--ink-2);
  transition:background .22s ease-out,color .22s ease-out,border-color .22s ease-out;
}
.rail-list a:hover{
  background:rgba(92,198,176,.18);
  border-left-color:var(--teal-deep);
  color:var(--ink);
}
.rail-contact{
  display:block;
  margin-top:14px;
  min-height:44px;
  padding:11px 10px;
  text-align:center;
  text-decoration:none;
  font-size:16px;
  color:var(--ink);
  border:1px solid rgba(23,38,35,.28);
  border-radius:var(--radius);
  background:rgba(255,255,255,.35);
  transition:background .22s ease-out,border-color .22s ease-out;
}
.rail-contact:hover{background:var(--teal);border-color:var(--teal-deep)}

/* 顶部堆叠主视觉 */
.hero{
  position:relative;
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  gap:24px;
  min-height:70vh;
  padding:64px clamp(20px,5vw,72px) 38px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.ghost{
  position:absolute;
  top:4%;
  right:-1.5%;
  max-width:98%;
  font-family:Orbitron,"Exo 2",system-ui,sans-serif;
  font-weight:700;
  font-size:clamp(52px,12vw,180px);
  line-height:.92;
  letter-spacing:-.03em;
  color:transparent;
  -webkit-text-stroke:1.4px rgba(60,157,138,.55);
  text-align:right;
  word-break:break-word;
  pointer-events:none;
  user-select:none;
  will-change:transform;
}
.hero-copy{
  position:relative;
  margin-left:auto;
  max-width:760px;
  text-align:right;
}
.hero-copy h1{
  margin:0;
  font-family:Orbitron,"Exo 2",system-ui,sans-serif;
  font-weight:600;
  font-size:clamp(29px,4.2vw,50px);
  line-height:1.18;
  letter-spacing:-.015em;
}
.lede{
  margin:14px 0 0 auto;
  max-width:54ch;
  font-size:17px;
  line-height:1.7;
  color:var(--ink-2);
}
.hero-fig{
  position:relative;
  margin:0;
  min-height:170px;
  border-radius:var(--radius);
  overflow:hidden;
  background:linear-gradient(135deg,var(--sand),#bfae8e 65%,rgba(92,198,176,.5));
  box-shadow:0 26px 46px -32px rgba(23,38,35,.85);
}
.hero-fig img{
  display:block;
  width:100%;
  height:auto;
  max-height:46vh;
  object-fit:cover;
  will-change:transform;
}

/* 正文 + 右侧栏 */
.shell{
  display:grid;
  grid-template-columns:minmax(0,1fr) 296px;
  gap:clamp(20px,3vw,44px);
  align-items:start;
  padding:clamp(26px,4vw,54px) clamp(20px,5vw,72px) 64px;
}
.prose{min-width:0}
.prose > section{
  margin:0 0 26px;
  padding:clamp(18px,2.4vw,30px);
  border:1px solid rgba(23,38,35,.10);
  border-radius:var(--radius);
  background:linear-gradient(160deg, rgba(255,253,247,.72), rgba(250,244,232,.5));
  backdrop-filter:blur(9px);
  -webkit-backdrop-filter:blur(9px);
  box-shadow:0 24px 44px -36px rgba(23,38,35,.9);
  scroll-margin-top:92px;
}
.prose > section:last-child{margin-bottom:0}

.prose h2{
  margin:0 0 12px;
  font-family:Orbitron,"Exo 2",system-ui,sans-serif;
  font-weight:600;
  font-size:clamp(21px,2.4vw,28px);
  line-height:1.3;
  letter-spacing:-.01em;
  color:var(--ink);
}
.prose h2 + hr,
.prose h3 + hr{
  width:66px;
  height:0;
  margin:-4px 0 18px;
  border:0;
  border-top:2px solid var(--teal-deep);
}
.prose h3{
  margin:26px 0 8px;
  font-family:"Exo 2",system-ui,sans-serif;
  font-weight:600;
  font-size:19px;
  line-height:1.45;
  color:var(--ink);
}
.prose h4{margin:20px 0 6px;font-size:17px;font-weight:600}
.prose p{margin:0 0 16px}
.prose p:last-child{margin-bottom:0}
.prose a{color:var(--teal-deep);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose a:hover{color:var(--ink)}
.prose ul,.prose ol{margin:0 0 16px;padding-left:22px}
.prose li{margin:0 0 8px}
.prose ul{list-style:none;padding-left:0}
.prose ul > li{position:relative;padding-left:20px}
.prose ul > li::before{
  content:"";
  position:absolute;
  left:2px;
  top:11px;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--teal-deep);
}
.prose blockquote{
  margin:0 0 18px;
  padding:14px 18px;
  border-left:3px solid var(--clay);
  background:rgba(212,196,168,.34);
  border-radius:0 var(--radius) var(--radius) 0;
  color:var(--ink-2);
}
.prose blockquote p:last-child{margin-bottom:0}
.prose figure{margin:0 0 18px}
.prose img{display:block;max-width:100%;height:auto;border-radius:var(--radius)}
.prose figcaption{font-size:15px;color:var(--ink-3);margin-top:8px}
.prose strong{font-weight:600}
.prose code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:15px;
  padding:1px 5px;
  border-radius:3px;
  background:rgba(23,38,35,.09);
}
.prose table{width:100%;border-collapse:collapse;margin:0 0 18px;font-size:16px}
.prose th,.prose td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left}
.prose th{background:rgba(212,196,168,.4);font-weight:600}

.side{
  position:sticky;
  top:24px;
  padding:18px;
  border:1px solid rgba(23,38,35,.10);
  border-radius:var(--radius);
  background:var(--glass);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:0 26px 46px -38px rgba(23,38,35,.95);
}
.side h2{
  margin:0 0 10px;
  font-family:Orbitron,"Exo 2",system-ui,sans-serif;
  font-weight:600;
  font-size:16px;
  line-height:1.4;
  letter-spacing:.01em;
}
.side hr{
  width:100%;
  height:0;
  margin:0 0 12px;
  border:0;
  border-top:1px solid rgba(60,157,138,.55);
}
.side ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.side a{
  display:block;
  min-height:42px;
  padding:9px 10px;
  border-radius:var(--radius);
  font-size:16px;
  line-height:1.5;
  text-decoration:none;
  color:var(--ink-2);
  transition:background .22s ease-out,color .22s ease-out;
}
.side a:hover{background:rgba(92,198,176,.2);color:var(--ink)}

/* 页脚 */
.foot{
  padding:clamp(30px,4vw,54px) clamp(20px,5vw,72px) 24px;
  color:#e8dfcc;
  border-top:1px solid rgba(92,198,176,.26);
  background:linear-gradient(180deg,#1b2b27,#101d1a 70%);
}
.foot-top{
  display:flex;
  flex-wrap:wrap;
  gap:32px 44px;
  justify-content:space-between;
  align-items:flex-start;
}
.foot-brand{max-width:42ch}
.foot-brand .mark{
  font-family:Orbitron,"Exo 2",system-ui,sans-serif;
  font-weight:700;
  font-size:19px;
  line-height:1.35;
  letter-spacing:.01em;
  color:var(--teal);
  text-decoration:none;
  word-break:break-word;
}
.foot-brand p{margin:12px 0 0;font-size:16px;line-height:1.7;color:#c4b9a2}
.foot-nav dl{
  display:grid;
  grid-template-columns:repeat(2,minmax(128px,1fr));
  gap:0 20px;
  margin:0;
}
.foot-nav dt{margin:0}
.foot-nav dd{margin:0}
.foot-nav a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:9px 2px;
  font-size:16px;
  line-height:1.5;
  text-decoration:none;
  color:#e8dfcc;
  border-bottom:1px solid rgba(232,223,204,.14);
  transition:color .22s ease-out,border-color .22s ease-out;
}
.foot-nav a:hover{color:var(--teal);border-bottom-color:var(--teal)}

.foot-sub{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:30px 0 0;
}
.foot-sub input{
  flex:1 1 240px;
  min-height:46px;
  padding:0 14px;
  font:inherit;
  font-size:16px;
  color:#f2ebdb;
  border:1px solid rgba(232,223,204,.3);
  border-radius:var(--radius);
  background:rgba(255,255,255,.07);
}
.foot-sub input::placeholder{color:#a9a08c}
.foot-sub button{
  min-height:46px;
  padding:0 24px;
  font:inherit;
  font-size:16px;
  font-weight:600;
  color:#0e1a17;
  border:0;
  border-radius:var(--radius);
  background:var(--teal);
  cursor:pointer;
  transition:background .22s ease-out;
}
.foot-sub button:hover{background:#79d9c5}

.foot-base{
  display:flex;
  flex-wrap:wrap;
  gap:12px 24px;
  justify-content:space-between;
  align-items:center;
  margin-top:26px;
  padding-top:16px;
  border-top:1px solid rgba(232,223,204,.16);
  font-size:15px;
  color:#b6ab94;
}
.base-links{display:flex;gap:8px;flex-wrap:wrap}
.base-links a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:6px 10px;
  font-size:15px;
  color:#e8dfcc;
  text-decoration:none;
  border-radius:var(--radius);
  transition:background .22s ease-out;
}
.base-links a:hover{background:rgba(92,198,176,.2)}

@media (max-width:960px){
  .page{padding-left:0}
  .rail{
    position:static;
    width:auto;
    height:auto;
    flex-direction:row;
    flex-wrap:wrap;
    align-items:center;
    gap:4px;
    padding:14px 16px 12px;
    border-right:0;
    border-bottom:1px solid var(--line);
  }
  .rail .mark{flex:1 1 100%;padding:4px 0 10px;font-size:17px}
  .rail-list{
    flex:1 1 100%;
    flex-direction:row;
    flex-wrap:wrap;
    gap:4px;
    margin-top:6px;
    overflow:visible;
  }
  .rail-list a{
    min-height:42px;
    padding:10px 11px;
    border-left:0;
    border:1px solid rgba(23,38,35,.16);
  }
  .rail-list a:hover{border-color:var(--teal-deep)}
  .rail-contact{margin:6px 0 0;flex:0 0 auto;min-height:42px;padding:9px 14px}
  .hero{min-height:0;padding:32px 18px 26px;gap:18px}
  .ghost{font-size:clamp(42px,15vw,104px);top:2%}
  .lede{font-size:16px}
  .shell{grid-template-columns:minmax(0,1fr);padding:22px 18px 46px;gap:22px}
  .side{position:static;order:2}
  .prose > div{scroll-margin-top:24px;padding:18px}
  .foot{padding:28px 18px 20px}
  .foot-nav dl{grid-template-columns:1fr}
  .foot-nav a{min-height:44px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation:none !important;transition:none !important}
  .ghost,.hero-fig img{transform:none !important}
}

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