:root{
  /* A3：雨林自然·温润人文（更“自然、舒服、大气”） */
  --bg0:#07120f;
  --bg1:#0b1f18;
  --bg2:#091a14;
  --card:rgba(255,255,255,.060);
  --card2:rgba(255,255,255,.034);
  --line:rgba(255,255,255,.10);
  --line2:rgba(255,255,255,.06);
  --text:#f4f1e7;
  --muted:#c8c1ae;
  --muted2:#a59d89;
  --accent:#34d399;  /* 雨林绿（克制） */
  --accent2:#d6b36a; /* 茶汤暖金（点缀） */
  --accent3:#9db7a7; /* 柔和辅助绿 */
  --shadow:0 18px 55px rgba(0,0,0,.48);
  --radius:18px;
  --max:1200px;
  --ring: 0 0 0 3px rgba(52,211,153,.22);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  color:var(--text);
  background:
    radial-gradient(1180px 780px at 12% -8%, rgba(157,183,167,.12) 0%, rgba(7,18,15,0) 64%),
    radial-gradient(980px 680px at 92% 18%, rgba(214,179,106,.10) 0%, rgba(7,18,15,0) 66%),
    radial-gradient(980px 520px at 50% 112%, rgba(52,211,153,.09) 0%, rgba(7,18,15,0) 66%),
    linear-gradient(180deg, var(--bg1), var(--bg0));
}
a{color:inherit;text-decoration:none}

.container{max-width:var(--max);margin:0 auto;padding:0 18px}

.skip{
  position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden;
}
.skip:focus{
  left:18px;top:10px;width:auto;height:auto;z-index:999;
  padding:10px 12px;border-radius:12px;
  background:rgba(0,0,0,.65);
  border:1px solid rgba(255,255,255,.12);
  box-shadow:var(--shadow);
}

.divider{
  height:1px;
  background:linear-gradient(90deg, rgba(255,255,255,0), rgba(255,255,255,.12), rgba(255,255,255,0));
  margin:18px 0 0;
}

.topbar{
  position:sticky; top:0; z-index:20;
  background:rgba(7,18,15,.70);
  backdrop-filter: blur(10px);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0}
.brand{
  display:flex;flex-direction:column;gap:2px;
}
.brand strong{font-size:clamp(16px, 1.2vw, 18px);letter-spacing:.6px}
.brand span{font-size:clamp(12px, .95vw, 13.5px);color:var(--muted)}
.nav{
  display:flex;
  align-items:center;gap:8px;
  font-size:clamp(13px, 1.05vw, 14.5px);color:var(--muted);
  overflow:auto;
  max-width:64vw;
  scrollbar-width: none;
}
.nav::-webkit-scrollbar{display:none}
.nav a{padding:9px 12px;border-radius:12px}
.nav a:hover{background:rgba(255,255,255,.04);color:rgba(234,241,255,.92)}
.nav a[data-active="true"]{color:var(--text);background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08)}

.hero{
  padding:44px 0 18px;
}
.hero-card{
  border:1px solid rgba(255,255,255,.10);
  border-radius:calc(var(--radius) + 4px);
  background:linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.03));
  box-shadow:var(--shadow);
  overflow:hidden;
  position:relative;
}
.hero-card::before{
  content:"";
  position:absolute;inset:-2px;
  background:
    radial-gradient(620px 340px at 18% 18%, rgba(52,211,153,.14) 0%, rgba(0,0,0,0) 68%),
    radial-gradient(620px 360px at 86% 28%, rgba(214,179,106,.13) 0%, rgba(0,0,0,0) 72%),
    linear-gradient(180deg, rgba(0,0,0,.0), rgba(0,0,0,.16));
  pointer-events:none;
  filter:saturate(1.05);
}
.hero-inner{padding:22px}
.hero-layout{
  display:grid;
  gap:14px;
  grid-template-columns:1fr;
  position:relative;
  z-index:1;
}
.hero-media{
  border:1px solid rgba(255,255,255,.10);
  border-radius:calc(var(--radius) + 2px);
  background:
    radial-gradient(620px 260px at 30% 20%, rgba(214,179,106,.14) 0%, rgba(0,0,0,0) 64%),
    radial-gradient(620px 320px at 70% 55%, rgba(52,211,153,.12) 0%, rgba(0,0,0,0) 68%),
    linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  overflow:hidden;
  min-height:180px;
  box-shadow:0 14px 36px rgba(0,0,0,.36);
}
.hero-media .frame{
  height:100%;
  padding:14px;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  gap:10px;
}
.hero-media .label{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  color:var(--muted);
  font-size:12px;
}
.hero-media .label b{
  color:rgba(234,241,255,.92);
  font-weight:600;
}
.hero-media .placeholder{
  border-radius:14px;
  border:1px dashed rgba(255,255,255,.18);
  background:rgba(0,0,0,.14);
  flex:1;
  min-height:118px;
  overflow:hidden;
  display:flex;
  align-items:flex-end;
  justify-content:flex-start;
  padding:12px;
  color:var(--muted2);
  font-size:12px;
  line-height:1.6;
}
.hero-media .placeholder img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  border-radius:12px;
  filter:saturate(.98) contrast(.98);
}

.kicker{
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;
  color:var(--muted);font-size:13px;
}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 10px;border-radius:999px;
  border:1px solid rgba(255,255,255,.10);
  background:rgba(255,255,255,.04);
}
.dot{width:8px;height:8px;border-radius:50%;background:var(--accent)}
.hero h1{margin:14px 0 10px;font-size:30px;letter-spacing:.9px}
.slogan{margin:0;color:var(--text);font-size:16px;line-height:1.6}
.lead{margin:10px 0 0;color:var(--muted);font-size:14px;line-height:1.8;max-width:60ch}
.cta-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.btn{
  appearance:none;border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.055);color:var(--text);
  padding:10px 14px;border-radius:14px;
  font-size:14px;cursor:pointer;
}
.btn.primary{background:rgba(52,211,153,.16);border-color:rgba(52,211,153,.34)}
.btn.secondary{background:rgba(214,179,106,.12);border-color:rgba(214,179,106,.26)}
.btn:hover{background:rgba(255,255,255,.08)}
.btn.primary:hover{background:rgba(52,211,153,.20)}
.btn.secondary:hover{background:rgba(214,179,106,.16)}
.btn:active{transform:translateY(1px)}
.btn:focus-visible{outline:none;box-shadow:var(--ring)}

.grid{display:grid;gap:12px}
.grid.two{grid-template-columns:1fr}
.grid.three{grid-template-columns:1fr}

.section{padding:28px 0}
.section h2{margin:0 0 10px;font-size:19px;letter-spacing:.4px}
.subtitle{margin:0 0 14px;color:var(--muted);font-size:14px;line-height:1.75;max-width:78ch}

.section[data-theme]{
  position:relative;
}
.section[data-theme]::before{
  content:"";
  position:absolute;
  left:0; right:0; top:0;
  height:100%;
  background:
    radial-gradient(900px 520px at 20% 0%, color-mix(in srgb, var(--theme, rgba(255,255,255,.08)) 18%, transparent) 0%, transparent 70%),
    radial-gradient(900px 520px at 80% 20%, color-mix(in srgb, var(--theme, rgba(255,255,255,.08)) 12%, transparent) 0%, transparent 72%);
  opacity:.55;
  pointer-events:none;
}
.section[data-theme] > .container{
  position:relative;
  z-index:1;
}
.topic{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:8px 12px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.10);
  background:rgba(255,255,255,.04);
  color:rgba(244,241,231,.92);
  font-size:13px;
  letter-spacing:.3px;
  margin:0 0 10px;
}
.topic .dot{
  width:9px;
  height:9px;
  border-radius:999px;
  background:var(--theme, var(--accent));
  box-shadow:0 0 0 3px color-mix(in srgb, var(--theme, var(--accent)) 18%, transparent);
}

.section[data-theme="position"]{ --theme: var(--accent2); }
.section[data-theme="system"]{ --theme: var(--accent); }
.section[data-theme="space"]{ --theme: var(--accent3); }
.section[data-theme="season"]{ --theme: color-mix(in srgb, var(--accent2) 70%, var(--accent) 30%); }
.section[data-theme="visit"]{ --theme: color-mix(in srgb, var(--accent3) 70%, var(--accent2) 30%); }
.section[data-theme="join"]{ --theme: var(--accent); }

.section-head{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-bottom:14px;
}

.figure{
  margin:14px 0 16px;
  border:1px solid rgba(255,255,255,.10);
  border-radius:var(--radius);
  overflow:hidden;
  background:rgba(255,255,255,.03);
  box-shadow:0 14px 40px rgba(0,0,0,.32);
}
.figure img{
  width:100%;
  height:auto;
  display:block;
}
.figure .cap{
  padding:10px 12px;
  color:var(--muted2);
  font-size:12px;
  line-height:1.6;
  background:linear-gradient(180deg, rgba(0,0,0,.10), rgba(0,0,0,.22));
  border-top:1px solid rgba(255,255,255,.06);
}

.banner{
  position:relative;
  border:1px solid rgba(255,255,255,.10);
  border-radius:calc(var(--radius) + 4px);
  overflow:hidden;
  background:rgba(0,0,0,.18);
  box-shadow:var(--shadow);
}
.banner img{
  width:100%;
  height:240px;
  object-fit:cover;
  display:block;
  filter:saturate(.98) contrast(.98);
}
.banner::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(90deg, rgba(7,18,15,.66) 0%, rgba(7,18,15,.34) 44%, rgba(7,18,15,.08) 78%);
  pointer-events:none;
}
.banner .banner-body{
  position:absolute;inset:0;
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  gap:8px;
  padding:16px 16px 14px;
  max-width:720px;
}
.banner .banner-kicker{
  display:inline-flex;
  gap:8px;
  align-items:center;
  color:rgba(234,241,255,.92);
  font-size:12px;
}
.banner .banner-kicker i{
  width:8px;height:8px;border-radius:999px;background:rgba(214,179,106,.90);
  display:inline-block;
}
.banner .banner-title{
  margin:0;
  font-size:18px;
  letter-spacing:.4px;
}
.banner .banner-sub{
  margin:0;
  color:var(--muted);
  font-size:13px;
  line-height:1.7;
}

.card{
  border:1px solid rgba(255,255,255,.10);
  border-radius:var(--radius);
  background:linear-gradient(180deg, var(--card), var(--card2));
  box-shadow:0 12px 30px rgba(0,0,0,.28);
  overflow:hidden;
}
.card-body{padding:14px}
.card h3{margin:0 0 8px;font-size:15px}
.card p{margin:0;color:var(--muted);font-size:13px;line-height:1.75}
.card a:focus-visible{outline:none;box-shadow:var(--ring);border-radius:12px}
.card:hover{
  border-color:rgba(255,255,255,.14);
  box-shadow:0 14px 40px rgba(0,0,0,.34);
}
.tag{
  display:inline-flex;align-items:center;
  padding:6px 10px;border-radius:999px;
  border:1px solid rgba(255,255,255,.10);
  background:rgba(255,255,255,.04);
  color:var(--muted);font-size:12px;
}
.quote{
  border-left:3px solid rgba(214,179,106,.50);
  padding-left:12px;
  color:rgba(234,241,255,.92);
}
.quote small{display:block;color:var(--muted);margin-top:8px}

.split{
  display:grid;
  gap:12px;
  grid-template-columns:1fr;
}

.list{
  margin:0; padding:0 0 0 18px;
  color:var(--muted);
  font-size:13px; line-height:1.8;
}

.copy-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.copy{
  display:flex;align-items:center;gap:10px;
  padding:10px 12px;border-radius:14px;
  background:rgba(255,255,255,.04);
  border:1px dashed rgba(255,255,255,.16);
  color:var(--muted);font-size:13px;
}
.copy button{white-space:nowrap}
.hint{font-size:12px;color:var(--muted)}

.soft{
  color:var(--muted2);
}
.stat-row{
  margin-top:14px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.stat{
  display:flex;
  gap:10px;
  align-items:center;
  padding:10px 12px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.10);
  background:rgba(255,255,255,.03);
}
.stat b{font-size:14px}
.stat span{font-size:12px;color:var(--muted)}

.map{
  border:1px solid rgba(255,255,255,.10);
  border-radius:var(--radius);
  background:
    radial-gradient(520px 260px at 25% 30%, rgba(52,211,153,.12) 0%, rgba(0,0,0,0) 66%),
    radial-gradient(540px 280px at 78% 55%, rgba(214,179,106,.10) 0%, rgba(0,0,0,0) 66%),
    rgba(0,0,0,.18);
  overflow:hidden;
}
.map .map-body{
  padding:14px;
  min-height:170px;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  gap:10px;
}
.map .map-note{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
}
.map .map-body.map-image{
  padding:0;
  min-height:auto;
}
.map .map-body.map-image img{
  width:100%;
  height:auto;
  display:block;
}
.map .map-overlay{
  padding:12px 14px;
  border-top:1px solid rgba(255,255,255,.06);
  background:linear-gradient(180deg, rgba(0,0,0,.06), rgba(0,0,0,.20));
  display:flex;
  flex-direction:column;
  gap:8px;
}

.footer{
  padding:22px 0 34px;
  border-top:1px solid rgba(255,255,255,.08);
  color:var(--muted);
  font-size:12px;
}
.footer .row{display:flex;flex-direction:column;gap:8px}

@media (min-width: 920px){
  .nav{max-width:none}
  .hero h1{font-size:40px}
  .hero-layout{grid-template-columns:1.1fr .9fr;align-items:stretch}
  .hero-media{min-height:260px}
  .grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
  .split{grid-template-columns:1.1fr .9fr}
  .hero-inner{padding:28px 30px}
  .section{padding:38px 0}
  .footer .row{flex-direction:row;justify-content:space-between;align-items:center}
  .banner img{height:300px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .btn:active{transform:none}
}