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

:root{
  --ink:#172623;
  --ink-2:#33453f;
  --sand:#d4c4a8;
  --sand-l:#f1e9da;
  --sand-d:#c3ae8d;
  --paper:#f7f2e8;
  --teal:#5cc6b0;
  --teal-d:#2c8674;
  --clay:#c67b5c;
  --olive:#6b7b3c;
  --rail:238px;
  --strip:40px;
  --bd:1px solid rgba(23,38,35,.22);
  --r:4px;
}

*{box-sizing:border-box}

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

html,body{max-width:100%}

body{
  margin:0;
  padding-left:var(--rail);
  padding-top:var(--strip);
  background:var(--paper);
  color:var(--ink);
  font-family:'Manrope',"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.75;
  letter-spacing:.005em;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:8;
  pointer-events:none;
  opacity:.07;
  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='.86' numOctaves='3'/%3E%3C/filter%3E%3Crect width='150' height='150' filter='url(%23n)'/%3E%3C/svg%3E");
}

img{max-width:100%}

.sr{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

.skip{
  position:fixed;
  left:-9999px;top:0;
  z-index:60;
  padding:10px 18px;
  background:var(--ink);
  color:var(--sand-l);
  text-decoration:none;
}
.skip:focus{left:0}

/* 顶部细条 */
.ticker{
  position:fixed;
  top:0;left:0;right:0;
  height:var(--strip);
  z-index:40;
  display:flex;
  align-items:center;
  background:var(--ink);
  color:var(--sand);
  border-bottom:3px solid var(--teal);
}
.ticker p{
  margin:0;
  padding-left:18px;
  font-size:16px;
  letter-spacing:.08em;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

/* 左侧竖排导航 */
.rail{
  position:fixed;
  top:var(--strip);left:0;bottom:0;
  width:var(--rail);
  z-index:30;
  display:flex;
  flex-direction:column;
  padding:18px 0 14px;
  background:var(--sand);
  border-right:var(--bd);
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:0 16px 16px;
  color:var(--ink);
  text-decoration:none;
  border-bottom:var(--bd);
}
.brand-logo{
  width:36px;height:36px;
  object-fit:cover;
  border-radius:var(--r);
  border:var(--bd);
  flex:0 0 auto;
}
.brand-seal{
  width:36px;height:36px;
  flex:0 0 auto;
  display:grid;place-items:center;
  background:var(--teal);
  color:var(--ink);
  font-family:'Syne',sans-serif;
  font-weight:700;
  font-size:18px;
  border-radius:var(--r);
  clip-path:polygon(0 0,100% 0,100% 76%,0 100%);
}
.brand-txt{
  font-family:'Syne',sans-serif;
  font-weight:700;
  font-size:16px;
  line-height:1.35;
  letter-spacing:.02em;
}

.rail-nav{
  margin-top:8px;
  flex:1 1 auto;
  overflow-y:auto;
}
.rail-nav ol{
  list-style:none;
  margin:0;padding:0;
}
.rail-nav li{border-bottom:1px solid rgba(23,38,35,.13)}
.rail-nav a{
  display:flex;
  align-items:center;
  min-height:48px;
  padding:10px 16px;
  color:var(--ink-2);
  font-size:16px;
  text-decoration:none;
  transition:background .2s ease-out,color .2s ease-out;
}
.rail-nav a span{position:relative;padding-bottom:2px}
.rail-nav a:hover,
.rail-nav a:focus-visible{
  background:rgba(92,198,176,.34);
  color:var(--ink);
}
.rail-nav a:hover span::after,
.rail-nav a:focus-visible span::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--teal-d);
}
.rail-nav a[aria-current="true"]{
  color:var(--ink);
  font-weight:700;
  background:var(--teal);
  clip-path:polygon(0 0,100% 0,calc(100% - 12px) 100%,0 100%);
}

.rail-foot{
  margin:10px 16px 0;
  padding-top:10px;
  border-top:var(--bd);
  font-size:16px;
  line-height:1.5;
  color:var(--ink-2);
}

/* Hero：满屏 + 右对齐 + 斜切色带 */
.hero{
  position:relative;
  min-height:calc(100vh - var(--strip));
  display:flex;
  align-items:center;
  justify-content:flex-end;
  padding:70px clamp(20px,5vw,74px) 130px;
  overflow:hidden;
  text-align:right;
  color:var(--sand-l);
  background:linear-gradient(158deg,#1b302a 0%,#2a4a41 52%,#3a6a5f 100%);
}

.hero-media{
  position:absolute;
  inset:-10% 0;
  z-index:0;
  will-change:transform;
}
.hero-media img,
.hero-img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  filter:saturate(.82) contrast(1.03);
}

.hero::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  background:linear-gradient(256deg,rgba(23,38,35,.93) 0%,rgba(23,38,35,.7) 44%,rgba(23,38,35,.3) 100%);
}

.hero-slash{
  position:absolute;
  left:0;right:0;bottom:0;
  height:78px;
  z-index:2;
  background:var(--teal);
  clip-path:polygon(0 100%,0 52%,54% 0,100% 0,100% 100%);
  opacity:.94;
}

.hero-copy{
  position:relative;
  z-index:3;
  max-width:640px;
}

.eyebrow{
  margin:0;
  display:inline-block;
  padding:4px 12px;
  font-size:16px;
  letter-spacing:.14em;
  color:var(--ink);
  background:var(--sand);
  border-radius:var(--r);
  clip-path:polygon(0 0,100% 0,100% 100%,10px 100%,0 calc(100% - 10px));
}

.hero h1{
  margin:.36em 0 .4em;
  font-family:'Syne',sans-serif;
  font-weight:700;
  font-size:clamp(30px,4.4vw,56px);
  line-height:1.14;
  letter-spacing:-.015em;
  text-shadow:0 2px 24px rgba(0,0,0,.28);
}

.lede{
  margin:0 0 26px;
  font-size:18px;
  line-height:1.7;
  color:#e8e0cf;
}

.btn{
  display:inline-flex;
  align-items:center;
  min-height:50px;
  padding:0 26px;
  background:var(--teal);
  color:var(--ink);
  font-weight:600;
  font-size:17px;
  text-decoration:none;
  border-radius:var(--r);
  clip-path:polygon(0 0,100% 0,100% 100%,14px 100%,0 calc(100% - 14px));
  transition:background .2s ease-out,transform .2s ease-out;
}
.btn:hover{
  background:#7fdac7;
  transform:translateY(-2px);
}

/* 正文区：aside 在左 */
.wrap{
  display:grid;
  grid-template-columns:236px minmax(0,1fr);
  gap:clamp(20px,3.4vw,48px);
  align-items:start;
  max-width:1180px;
  margin:0 auto;
  padding:clamp(30px,4vw,64px) clamp(18px,4vw,48px);
}

.side{
  position:sticky;
  top:calc(var(--strip) + 22px);
  align-self:start;
  padding:16px 16px 20px;
  background:var(--sand-l);
  border:var(--bd);
  border-radius:var(--r);
}

.side h2{
  display:flex;
  align-items:center;
  gap:8px;
  margin:0 0 10px;
  font-family:'Syne',sans-serif;
  font-size:16px;
  letter-spacing:.06em;
}
.side h2 span{position:relative;padding-bottom:4px}
.side h2 span::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:26px;height:3px;
  background:var(--teal);
}
.side h2 + .side-list{margin-top:2px}

.side-list{
  list-style:none;
  margin:0 0 20px;
  padding:0;
  border-top:var(--bd);
}
.side-list li{border-bottom:1px dashed rgba(23,38,35,.24)}
.side-list a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:8px 0;
  color:var(--ink-2);
  font-size:16px;
  text-decoration:none;
  transition:color .18s ease-out,padding-left .18s ease-out;
}
.side-list a:hover{
  color:var(--teal-d);
  padding-left:6px;
}

.side-note{
  margin:0;
  font-size:16px;
  line-height:1.65;
  color:var(--ink-2);
}

.body-col{min-width:0}

.prose{
  max-width:70ch;
  font-size:17px;
}
.prose section{
  padding:clamp(22px,3vw,38px) 0;
  border-top:var(--bd);
  scroll-margin-top:calc(var(--strip) + 18px);
}
.prose section:first-child{
  padding-top:0;
  border-top:0;
}
.prose section:nth-child(even){
  padding:clamp(20px,3vw,32px);
  background:var(--sand-l);
  border:var(--bd);
  border-radius:var(--r);
}

.prose h2{
  margin:0 0 .7em;
  font-family:'Syne',sans-serif;
  font-size:clamp(22px,2.5vw,30px);
  line-height:1.3;
  letter-spacing:-.01em;
}
.prose h2 span{position:relative;display:inline-block;padding-bottom:6px}
.prose h2 span::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:100%;height:3px;
  background:var(--teal);
}

.prose h3{
  margin:0 0 .6em;
  font-family:'Syne',sans-serif;
  font-size:19px;
  line-height:1.4;
}
.prose h3 span{color:var(--teal-d)}

.prose p{margin:0 0 1.05em}
.prose p:last-child{margin-bottom:0}

.prose ul,.prose ol{
  margin:0 0 1.05em;
  padding-left:1.3em;
}
.prose li{margin-bottom:.4em}
.prose li::marker{color:var(--teal-d)}

.prose a{
  color:var(--teal-d);
  text-underline-offset:3px;
}
.prose a:hover{color:var(--ink)}

.prose strong{color:var(--ink);font-weight:700}
.prose blockquote{
  margin:0 0 1.1em;
  padding:12px 18px;
  border-left:4px solid var(--clay);
  background:rgba(198,123,92,.1);
  font-size:17px;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose code{
  padding:2px 6px;
  background:rgba(23,38,35,.08);
  border-radius:var(--r);
  font-size:16px;
}
.prose table{
  width:100%;
  border-collapse:collapse;
  margin:0 0 1.1em;
  font-size:16px;
}
.prose th,.prose td{
  padding:10px 12px;
  border:var(--bd);
  text-align:left;
}
.prose th{background:rgba(107,123,60,.14)}
.prose img{border-radius:var(--r);border:var(--bd)}

/* 页脚 */
.foot{
  margin-top:16px;
  padding:clamp(32px,4vw,56px) clamp(18px,4vw,48px) 22px;
  background:var(--ink);
  color:var(--sand-l);
  border-top:6px solid var(--teal);
}

.foot-top{
  display:grid;
  grid-template-columns:1fr minmax(280px,420px);
  gap:24px;
  align-items:center;
  max-width:1100px;
  margin:0 auto 32px;
  padding-bottom:26px;
  border-bottom:1px solid rgba(212,196,168,.28);
}
.foot-top h2{
  margin:0 0 6px;
  font-family:'Syne',sans-serif;
  font-size:clamp(20px,2.4vw,26px);
}
.foot-top h2 span{color:var(--teal)}
.foot-top p{margin:0;color:#cfc6b2;font-size:16px}

.sub{display:flex;flex-wrap:wrap;gap:8px}
.sub input{
  flex:1 1 180px;
  min-height:50px;
  padding:0 14px;
  font-family:inherit;
  font-size:16px;
  color:var(--sand-l);
  background:rgba(255,255,255,.07);
  border:1px solid rgba(212,196,168,.5);
  border-radius:var(--r);
}
.sub input::placeholder{color:#a9a294}
.sub button{
  min-height:50px;
  padding:0 22px;
  font-family:inherit;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  background:var(--teal);
  border:0;
  border-radius:var(--r);
  cursor:pointer;
}
.sub button:hover{background:#7fdac7}

.foot-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,3vw,40px);
  max-width:1100px;
  margin:0 auto;
}
.foot-cols dl{margin:0}
.foot-cols dt{
  margin-bottom:10px;
  padding-bottom:8px;
  font-family:'Syne',sans-serif;
  font-size:16px;
  letter-spacing:.08em;
  color:var(--teal);
  border-bottom:1px solid rgba(212,196,168,.28);
}
.foot-cols dd{
  margin:0 0 4px;
  font-size:16px;
  color:#cfc6b2;
}
.foot-cols a{
  display:inline-block;
  padding:7px 0;
  min-height:40px;
  color:#e8e0cf;
  text-decoration:none;
}
.foot-cols a:hover{color:var(--teal)}

.foot-line{
  max-width:1100px;
  margin:26px auto 0;
  padding-top:16px;
  border-top:1px solid rgba(212,196,168,.28);
  font-size:16px;
  color:#b0a897;
}

/* 移动端 */
@media (max-width:900px){
  body{
    padding-left:0;
    padding-top:106px;
  }

  .ticker{border-bottom-width:2px}
  .ticker p{font-size:16px;padding-left:12px}

  .rail{
    top:var(--strip);left:0;right:0;bottom:auto;
    width:auto;height:auto;
    flex-direction:row;
    align-items:center;
    gap:8px;
    padding:6px 10px;
    border-right:0;
    border-bottom:var(--bd);
  }
  .brand{
    flex:0 0 auto;
    padding:0 8px 0 0;
    border-bottom:0;
  }
  .brand-txt{font-size:16px;max-width:92px}
  .rail-nav{
    flex:1 1 auto;
    margin:0;
    overflow-x:auto;
    overflow-y:hidden;
    -webkit-overflow-scrolling:touch;
  }
  .rail-nav ol{display:flex;gap:6px;padding-bottom:2px}
  .rail-nav li{border-bottom:0}
  .rail-nav a{
    min-height:46px;
    padding:0 12px;
    white-space:nowrap;
    border-radius:var(--r);
  }
  .rail-nav a[aria-current="true"]{
    clip-path:polygon(0 0,100% 0,calc(100% - 8px) 100%,0 100%);
  }
  .rail-foot{display:none}

  .hero{
    min-height:calc(100vh - 106px);
    padding:44px 18px 108px;
  }
  .hero h1{font-size:clamp(28px,8.4vw,42px)}
  .lede{font-size:17px}
  .hero-slash{height:60px}

  .wrap{
    grid-template-columns:minmax(0,1fr);
    gap:22px;
    padding:26px 18px 40px;
  }
  .side{
    position:static;
    padding:14px 14px 16px;
  }
  .side-list{
    display:flex;
    flex-wrap:wrap;
    gap:6px;
    border-top:0;
  }
  .side-list li{
    border:1px dashed rgba(23,38,35,.3);
    border-radius:var(--r);
  }
  .side-list a{min-height:44px;padding:8px 10px}

  .prose section{scroll-margin-top:118px}

  .foot-top{grid-template-columns:minmax(0,1fr)}
  .foot-cols{grid-template-columns:minmax(0,1fr);gap:18px}
  .foot-cols dl + dl{border-top:1px solid rgba(212,196,168,.2);padding-top:14px}
}

@media (max-width:420px){
  .brand-txt{display:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{
    transition-duration:.01ms !important;
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
  }
  .hero-media{transform:none !important}
}

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