:root{
  color-scheme: light;
  --bg:#edf6f1;
  --bg-2:#dcecdf;
  --paper:#ffffff;
  --paper-2:#f4fbf7;
  --ink:#1c1b18;
  --muted:#5f685f;
  --line:rgba(28,27,24,.11);
  --shadow:0 16px 40px rgba(42,58,47,.1);
  --shadow-soft:0 10px 24px rgba(42,58,47,.07);
  --accent:#245e4f;
  --accent-2:#b56a3d;
  --accent-3:#54739c;
  --radius-xl:26px;
  --radius-lg:20px;
  --radius-md:14px;
  --max:1220px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  min-width:320px;
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;
  line-height:1.75;
  background:
    radial-gradient(circle at 12% 0%, rgba(36,94,79,.12), transparent 18%),
    radial-gradient(circle at 90% 10%, rgba(181,106,61,.11), transparent 17%),
    linear-gradient(180deg, #f7fcf9 0%, var(--bg) 54%, var(--bg-2) 100%);
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(0,0,0,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,.028) 1px, transparent 1px);
  background-size:46px 46px;
  opacity:.28;
  mask-image:linear-gradient(180deg, rgba(0,0,0,.22), transparent 86%);
}
a{color:inherit;text-decoration:none}
p,ul{margin:0}
strong{font-weight:700}

.skip-link{
  position:absolute;
  left:-999px;
  top:12px;
  z-index:50;
  padding:10px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:#fff;
  box-shadow:var(--shadow-soft);
}
.skip-link:focus{left:12px}

.paper{
  width:min(var(--max), calc(100vw - 24px));
  margin:0 auto;
  padding:16px 0 44px;
}

.header{
  position:sticky;
  top:10px;
  z-index:20;
  display:flex;
  align-items:center;
  gap:18px;
  padding:14px 18px;
  border-radius:20px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.84);
  backdrop-filter:blur(16px);
  box-shadow:var(--shadow-soft);
}
.brand-lockup{
  display:flex;
  align-items:center;
  gap:12px;
}
.brand-mark{
  width:46px;
  height:46px;
  border-radius:15px;
  display:grid;
  place-items:center;
  color:#fff;
  background:linear-gradient(145deg, var(--accent), #3c856e);
  font:800 18px/1 "PingFang SC","Microsoft YaHei",sans-serif;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.2);
}
.brand-lockup strong{display:block;font-size:18px;line-height:1.08}
.brand-lockup p{display:block;margin-top:3px;color:var(--muted);font-size:12px}
.topnav{
  margin-left:auto;
  display:flex;
  flex-wrap:wrap;
  justify-content:flex-end;
  gap:8px;
}
.topnav a{
  padding:9px 13px;
  border-radius:999px;
  border:1px solid transparent;
  color:var(--muted);
  background:rgba(36,94,79,.04);
}
.topnav a:hover,
.topnav a:focus-visible{
  color:var(--ink);
  border-color:rgba(36,94,79,.18);
  background:rgba(36,94,79,.08);
  outline:none;
}

main{padding-top:16px}
.story-grid{
  display:grid;
  grid-template-columns:minmax(240px,.78fr) minmax(0,1.22fr);
  gap:18px;
  align-items:start;
}
.story-rail{
  position:sticky;
  top:98px;
  padding:22px;
  border-radius:24px;
  border:1px solid var(--line);
  background:
    radial-gradient(circle at 18% 14%, rgba(36,94,79,.12), transparent 18%),
    linear-gradient(180deg, rgba(255,255,255,.98), rgba(244,251,247,.96));
  box-shadow:var(--shadow);
}
.rail-kicker,
.section-kicker,
.eyebrow{
  display:inline-flex;
  width:fit-content;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border-radius:999px;
  border:1px solid rgba(36,94,79,.14);
  background:rgba(36,94,79,.08);
  color:#205345;
  font-size:13px;
  font-weight:700;
  letter-spacing:.02em;
}
.story-rail h1{
  margin:14px 0 0;
  font-family:"Songti SC","STSong","Noto Serif SC",serif;
  font-size:clamp(34px,4.4vw,58px);
  line-height:1.02;
  letter-spacing:-.06em;
}
.rail-lead{
  margin-top:14px;
  color:var(--muted);
  line-height:1.9;
}
.rail-list{
  margin:18px 0 0;
  padding-left:20px;
  color:var(--muted);
  line-height:1.9;
}
.rail-list li+li{margin-top:10px}

.story-body{
  display:grid;
  gap:18px;
}
.hero,
.section,
.about-card{
  border:1px solid var(--line);
  background:var(--paper);
  box-shadow:var(--shadow);
}
.hero{
  padding:28px;
  border-radius:28px;
  background:
    radial-gradient(circle at 18% 18%, rgba(36,94,79,.12), transparent 18%),
    radial-gradient(circle at 84% 18%, rgba(181,106,61,.1), transparent 16%),
    linear-gradient(135deg, rgba(255,255,255,.98), rgba(245,251,248,.96));
}
.hero h2{
  margin:14px 0 0;
  font-family:"Songti SC","STSong","Noto Serif SC",serif;
  font-size:clamp(32px,4.4vw,62px);
  line-height:.98;
  letter-spacing:-.06em;
  max-width:12ch;
}
.lead{
  margin-top:14px;
  max-width:62ch;
  color:var(--muted);
  font-size:1.05rem;
  line-height:1.92;
}
.section{
  padding:24px;
  border-radius:24px;
}
.section-heading{
  display:grid;
  gap:10px;
  margin-bottom:16px;
}
.note-grid,
.guide-grid{
  display:grid;
  gap:14px;
}
.note-grid{
  grid-template-columns:repeat(3, minmax(0,1fr));
}
.note-card,
.guide-grid article{
  border:1px solid rgba(28,27,24,.1);
  border-radius:20px;
  padding:18px;
  background:linear-gradient(180deg, #fff 0%, #f7fbf8 100%);
}
.note-card p,
.guide-grid p{
  color:var(--muted);
  line-height:1.85;
}
.note-card h3,
.guide-grid h3{
  margin-bottom:8px;
}

.path-timeline{
  display:grid;
  gap:12px;
}
.path-timeline article{
  display:grid;
  grid-template-columns:48px 1fr;
  gap:14px;
  align-items:start;
  padding:16px 0;
  border-top:1px solid var(--line);
}
.path-timeline article:first-child{
  border-top:0;
  padding-top:0;
}
.path-timeline span{
  display:grid;
  place-items:center;
  width:48px;
  height:48px;
  border-radius:16px;
  background:rgba(36,94,79,.1);
  color:#205345;
  font-weight:800;
}
.path-timeline p,
.path-timeline h3{
  margin:0;
}
.path-timeline p{
  color:var(--muted);
  line-height:1.85;
  margin-top:6px;
}

.footer{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-top:18px;
  padding:14px 4px 4px;
  color:var(--muted);
}
.footer a{color:var(--ink)}

.about-layout{
  display:grid;
  grid-template-columns:minmax(0,720px);
  justify-content:center;
}
.about-card{
  margin-top:18px;
  padding:26px 22px 24px;
  border-radius:24px;
  background:linear-gradient(180deg, #fff 0%, #f4fbf7 100%);
}
.about-card p{
  color:var(--muted);
  line-height:1.9;
}
.about-card p + p{margin-top:12px}
.home-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  margin-top:18px;
  padding:0 16px;
  border-radius:999px;
  border:1px solid rgba(36,94,79,.18);
  background:rgba(36,94,79,.08);
  color:#205345;
}

@media (max-width: 1080px){
  .story-grid{
    grid-template-columns:1fr;
  }
  .story-rail{
    position:relative;
    top:auto;
  }
  .note-grid{
    grid-template-columns:1fr;
  }
}

@media (max-width: 720px){
  .paper{
    width:min(var(--max), calc(100vw - 18px));
    padding-top:10px;
  }
  .header{
    flex-wrap:wrap;
    border-radius:18px;
    padding:14px;
  }
  .topnav{
    margin-left:0;
    justify-content:flex-start;
  }
  .hero{
    padding:18px;
    border-radius:20px;
  }
  .section{
    padding:18px;
    border-radius:20px;
  }
  .story-rail h1{
    font-size:clamp(28px, 11vw, 42px);
  }
  .hero h2{
    font-size:clamp(28px, 9vw, 44px);
  }
  .footer{
    flex-direction:column;
    align-items:flex-start;
  }
}