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

:root{
  --ink:#172623;
  --mint:#5cc6b0;
  --sand:#d4c4a8;
  --soil:#c67b5c;
  --olive:#6b7b3c;
  --paper:#f6efe4;
  --card:#fffdf8;
  --line:rgba(23,38,35,.16);
  --soft:0 20px 44px -28px rgba(23,38,35,.55);
  --rail:252px;
}

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

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

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Jost',"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:1rem;
  line-height:1.7;
  font-weight:400;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:3;
  pointer-events:none;
  opacity:.055;
  background-image:radial-gradient(rgba(23,38,35,.9) 1px,transparent 1px);
  background-size:3px 3px;
}

h1,h2,h3{
  font-family:'Bodoni Moda',"Songti SC",Georgia,serif;
  font-weight:500;
  letter-spacing:.01em;
}

img{max-width:100%}
a{color:inherit}

/* ---- 左侧竖排导航 ---- */
.rail{
  position:fixed;
  left:0;
  top:0;
  bottom:0;
  width:var(--rail);
  z-index:10;
  display:flex;
  flex-direction:column;
  gap:24px;
  padding:26px 18px 26px;
  background:linear-gradient(180deg,#1e332c 0%,#172623 62%,#12201d 100%);
  border-right:1px solid rgba(212,196,168,.22);
  overflow-y:auto;
}

.mark{
  width:48px;
  height:48px;
  flex:none;
  display:grid;
  place-items:center;
  border-radius:52% 48% 42% 58% / 48% 58% 42% 52%;
  background:var(--mint);
  color:#12201d;
  font-family:'Bodoni Moda',serif;
  font-size:1.4rem;
  line-height:1;
  text-decoration:none;
  box-shadow:0 10px 22px -14px rgba(0,0,0,.9);
}
.mark img{width:100%;height:100%;object-fit:cover;display:block;border-radius:inherit}
.mark--sm{width:34px;height:34px;font-size:1rem}

.rail header{min-width:0}
.rail nav p{
  display:flex;
  flex-direction:column;
  gap:2px;
  margin:0;
}
.rail nav a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:10px 11px;
  border-radius:4px;
  color:#d7e2d6;
  font-size:1rem;
  line-height:1.4;
  text-decoration:none;
  border-bottom:1px solid rgba(212,196,168,.1);
  transition:background .3s ease-out,color .3s ease-out,padding-left .3s ease-out;
}
.rail nav a:hover,
.rail nav a:focus-visible{
  background:rgba(92,198,176,.15);
  color:#fff;
  padding-left:16px;
  outline:none;
}
.tick{
  width:9px;
  height:9px;
  flex:none;
  background:var(--mint);
  border-radius:2px 50% 2px 50% / 50% 2px 50% 2px;
  opacity:.75;
}

/* ---- 页面主体 ---- */
.page{margin-left:var(--rail)}

.ticker{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:8px 28px;
  background:var(--sand);
  color:#25332c;
  font-size:1rem;
  letter-spacing:.04em;
  border-bottom:1px solid rgba(23,38,35,.12);
}
.ticker span{
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}

/* ---- 首屏 ---- */
.hero{
  position:relative;
  min-height:70vh;
  display:grid;
  place-items:center;
  padding:72px 26px 96px;
  overflow:hidden;
  background:linear-gradient(152deg,#2b453b 0%,#4e8b7b 46%,#5cc6b0 74%,#d4c4a8 100%);
  clip-path:polygon(0 0,100% 0,100% 100%,0 calc(100% - 46px));
}
.hero-img{position:absolute;inset:0;z-index:0}
.hero-img img{width:100%;height:100%;object-fit:cover;display:block}
.hero-img::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(23,38,35,.3),rgba(23,38,35,.62));
}
.hero-inner{
  position:relative;
  z-index:2;
  max-width:820px;
  text-align:center;
}
.hero h1{
  margin:0;
  font-size:clamp(2rem,4.6vw,3.6rem);
  line-height:1.22;
  color:#fff;
  text-shadow:0 4px 30px rgba(18,32,29,.55);
}
.hero-band{
  position:absolute;
  left:0;
  bottom:0;
  z-index:2;
  width:58%;
  height:10px;
  background:linear-gradient(90deg,var(--mint),var(--sand));
}

/* ---- 双栏 ---- */
.wrap{
  display:grid;
  grid-template-columns:minmax(0,1fr) 292px;
  align-items:start;
  gap:36px;
  max-width:1180px;
  margin:0 auto;
  padding:46px 28px 76px;
}

article{min-width:0}

.content{
  display:block;
  background:var(--card);
  border-radius:4px;
  box-shadow:var(--soft);
  border:1px solid rgba(23,38,35,.07);
  padding:clamp(22px,3vw,42px);
}
.content > section{
  scroll-margin-top:26px;
}
.content > section + section{
  margin-top:2.6rem;
  padding-top:2.4rem;
  border-top:1px dashed rgba(23,38,35,.16);
}

.content h2{
  margin:0;
  font-size:clamp(1.55rem,2.6vw,2.05rem);
  line-height:1.28;
}
.content h3{
  margin:1.6em 0 .4em;
  font-size:clamp(1.2rem,1.8vw,1.42rem);
  line-height:1.35;
}
.content h2 + hr,
.content h3 + hr,
aside h2 + hr{
  margin:14px 0 22px;
  border:0;
  width:68px;
  height:3px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--mint),var(--sand));
}
.content hr{
  margin:26px 0;
  border:0;
  height:1px;
  background:rgba(23,38,35,.13);
}

.content p{margin:0 0 1.05em}
.content p:last-child{margin-bottom:0}
.content ul,
.content ol{margin:0 0 1.1em;padding-left:1.35em}
.content li{margin:0 0 .45em}
.content li::marker{color:var(--soil)}
.content strong{color:#0f1c19;font-weight:600}
.content em{color:var(--olive);font-style:italic}
.content a{
  color:#1f6b5c;
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}
.content a:hover{color:var(--soil)}
.content img{border-radius:4px;box-shadow:var(--soft);display:block;margin:1.2em 0}
.content figure{margin:1.4em 0}
.content blockquote{
  margin:1.4em 0;
  padding:14px 20px;
  border-left:3px solid var(--mint);
  background:rgba(92,198,176,.1);
  border-radius:0 4px 4px 0;
  color:#22403a;
}
.content blockquote p:last-child{margin-bottom:0}
.content code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:.95em;
  background:rgba(23,38,35,.08);
  padding:2px 6px;
  border-radius:3px;
}
.content table{
  width:100%;
  border-collapse:collapse;
  margin:1.2em 0;
  font-size:1rem;
}
.content th,
.content td{
  border:1px solid rgba(23,38,35,.16);
  padding:9px 12px;
  text-align:left;
}
.content th{background:rgba(212,196,168,.4)}

/* ---- 右栏 ---- */
aside{
  position:sticky;
  top:26px;
  display:grid;
  gap:18px;
}
.panel{
  background:#1c2f29;
  color:#e2ece2;
  border-radius:4px;
  padding:22px 20px;
  box-shadow:var(--soft);
}
.panel h2{
  margin:0;
  font-size:1.28rem;
  line-height:1.3;
  color:#fff;
}
.panel ul{list-style:none;margin:0;padding:0}
.panel li{margin:0}
.panel a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:8px 0;
  color:#cfe0cf;
  font-size:1rem;
  line-height:1.4;
  text-decoration:none;
  border-bottom:1px solid rgba(212,196,168,.12);
  transition:color .25s ease-out,padding-left .25s ease-out;
}
.panel a:hover,
.panel a:focus-visible{color:var(--mint);padding-left:6px;outline:none}

.totop{
  display:block;
  width:100%;
  min-height:46px;
  padding:11px 14px;
  border:1px solid rgba(23,38,35,.2);
  border-radius:4px;
  background:var(--sand);
  color:#25332c;
  font-family:inherit;
  font-size:1rem;
  line-height:1.4;
  cursor:pointer;
  transition:background .25s ease-out,transform .25s ease-out;
}
.totop:hover{background:#c9b697;transform:translateY(-2px)}
.totop:focus-visible{outline:2px solid var(--mint);outline-offset:2px}

/* ---- 页脚 ---- */
footer{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px 24px;
  padding:26px 28px 42px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(212,196,168,.2),transparent);
  font-size:1rem;
}
.f-brand{display:flex;align-items:center;gap:10px}
.f-brand .mark{background:var(--ink);color:var(--sand)}
.f-brand .mark img{border-radius:inherit}
footer nav{display:flex;flex-wrap:wrap;gap:0 4px}
footer nav a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:8px 9px;
  color:#2c3d36;
  text-decoration:none;
  border-radius:4px;
  transition:background .25s ease-out,color .25s ease-out;
}
footer nav a:hover,
footer nav a:focus-visible{background:rgba(92,198,176,.2);color:#12201d;outline:none}
.f-copy{color:#4a5c53;font-size:1rem}

/* ---- 动效 ---- */
@media (prefers-reduced-motion: no-preference){
  .js .rv{
    opacity:0;
    transform:translateY(22px);
    transition:opacity .75s ease-out,transform .75s ease-out;
  }
  .js .rv.in{opacity:1;transform:none}

  .rail nav a{
    opacity:0;
    animation:railIn .55s ease-out forwards;
    animation-delay:calc(var(--i,0) * 70ms + 120ms);
  }
  @keyframes railIn{
    from{opacity:0;transform:translateX(-12px)}
    to{opacity:1;transform:none}
  }
}

/* ---- 断点 ---- */
@media (max-width:1040px){
  .wrap{grid-template-columns:minmax(0,1fr) 250px;gap:26px;padding:38px 22px 64px}
}

@media (max-width:900px){
  .rail{
    position:static;
    width:auto;
    flex-direction:row;
    align-items:center;
    gap:12px;
    padding:10px 12px;
    overflow:visible;
    border-right:0;
    border-bottom:1px solid rgba(212,196,168,.28);
  }
  .rail header{flex:1;min-width:0;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .rail nav p{flex-direction:row;gap:4px}
  .rail nav a{
    min-height:44px;
    padding:10px 11px;
    white-space:nowrap;
    border-bottom:0;
  }
  .rail nav a:hover,
  .rail nav a:focus-visible{padding-left:11px}
  .page{margin-left:0}
  .ticker{padding:8px 16px;white-space:nowrap;overflow:hidden}
  .hero{min-height:58vh;padding:56px 20px 76px;clip-path:polygon(0 0,100% 0,100% 100%,0 calc(100% - 30px))}
  .wrap{grid-template-columns:minmax(0,1fr);padding:28px 16px 52px;gap:22px}
  aside{position:static}
  .panel ul{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    column-gap:14px;
  }
  footer{padding:22px 16px 34px}
  footer nav{gap:0 2px}
}

@media (max-width:420px){
  .hero h1{font-size:1.95rem}
  .panel ul{grid-template-columns:minmax(0,1fr)}
  footer{flex-direction:column;align-items:flex-start}
}

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