:root{
  color-scheme: light;
  --bg:#f4ebdd;
  --bg-2:#eadcc9;
  --paper:#fffaf3;
  --paper-2:#f3e9d8;
  --rail:#101823;
  --ink:#1b1714;
  --muted:#655a4d;
  --line:rgba(27,23,20,.11);
  --shadow:0 22px 54px rgba(53, 37, 19, .12);
  --shadow-soft:0 10px 26px rgba(53, 37, 19, .08);
  --accent:#1e6a6b;
  --accent-2:#9a5f2e;
  --radius-xl:30px;
  --radius-lg:22px;
  --radius-md:16px;
  --max:1240px;
}

*{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:1.76;
  background:
    radial-gradient(circle at 10% 10%, rgba(30,106,107,.12), transparent 18%),
    radial-gradient(circle at 90% 8%, rgba(154,95,46,.12), transparent 17%),
    linear-gradient(180deg, #f8f3e9 0%, var(--bg) 52%, var(--bg-2) 100%);
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.65) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.34) 1px, transparent 1px);
  background-size:44px 44px;
  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}

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

.masthead{
  position:sticky;
  top:10px;
  z-index:20;
  display:flex;
  align-items:center;
  gap:18px;
  padding:14px 18px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(255,250,243,.86);
  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:16px;
  display:grid;
  place-items:center;
  color:#fff9f1;
  font:800 18px/1 "Iowan Old Style","Songti SC","Noto Serif SC",serif;
  background:linear-gradient(145deg, var(--rail), #2c3444);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.16);
}
.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;
  color:var(--muted);
  border:1px solid transparent;
  background:rgba(255,255,255,.5);
}
.topnav a:hover,
.topnav a:focus-visible{
  border-color:rgba(30,106,107,.18);
  background:rgba(30,106,107,.08);
  color:var(--ink);
  outline:none;
}

main{padding-top:16px}
.hero,
.section,
.about-card{
  border:1px solid var(--line);
  background:var(--paper);
  box-shadow:var(--shadow);
}
.hero{
  display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);
  gap:18px;
  padding:28px;
  border-radius:32px;
  overflow:hidden;
  background:
    radial-gradient(circle at 16% 18%, rgba(30,106,107,.14), transparent 20%),
    radial-gradient(circle at 86% 18%, rgba(154,95,46,.12), transparent 18%),
    linear-gradient(135deg, rgba(255,250,244,.98), rgba(243,233,216,.96));
}
.hero-copy{
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:18px;
}
.eyebrow,
.section-kicker,
.board-kicker{
  display:inline-flex;
  width:fit-content;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border-radius:999px;
  border:1px solid rgba(30,106,107,.14);
  background:rgba(30,106,107,.08);
  color:#18585d;
  font-size:13px;
  font-weight:700;
  letter-spacing:.02em;
}
h1,h2,h3{margin:0}
h1{
  font-family:"Songti SC","STSong","Noto Serif SC",serif;
  font-size:clamp(42px,6vw,82px);
  line-height:.96;
  letter-spacing:-.06em;
  max-width:12ch;
}
h2{
  font-family:"Songti SC","STSong","Noto Serif SC",serif;
  font-size:clamp(26px,3.4vw,44px);
  line-height:1.08;
  letter-spacing:-.04em;
}
h3{
  font-size:1.02rem;
  line-height:1.35;
}
.lead{
  max-width:58ch;
  font-size:1.07rem;
  line-height:1.9;
  color:var(--muted);
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.action,
.home-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 16px;
  border-radius:999px;
  border:1px solid rgba(30,106,107,.16);
  background:var(--rail);
  color:#f5f8fb;
  box-shadow:0 12px 24px rgba(16,24,35,.16);
}
.action--ghost{
  background:#fff;
  color:var(--ink);
  box-shadow:none;
}
.hero-board{
  padding:20px;
  border-radius:28px;
  background:
    linear-gradient(180deg, rgba(16,24,35,.98), rgba(16,24,35,.92));
  color:#e9edf5;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  gap:16px;
}
.board-stack{
  display:grid;
  gap:12px;
}
.board-item{
  padding:14px 15px;
  border-radius:18px;
  border:1px solid rgba(255,255,255,.08);
  background:rgba(255,255,255,.04);
}
.board-item strong{
  display:block;
  margin-bottom:6px;
  color:#fff;
  font-size:1rem;
}
.board-item span{
  color:#bcc7d8;
  line-height:1.82;
}

.section{
  margin-top:18px;
  border-radius:28px;
  padding:24px;
}
.section-heading{
  display:grid;
  gap:10px;
  margin-bottom:16px;
}
.meaning-grid,
.route-grid,
.compare-grid{
  display:grid;
  gap:14px;
}
.meaning-grid{
  grid-template-columns:minmax(0,1.08fr) minmax(260px,.92fr);
}
.prose-card,
.signal-card,
.route-card,
.compare-card{
  border:1px solid rgba(27,23,20,.1);
  border-radius:24px;
  background:linear-gradient(180deg, #fffdf8 0%, #fff8ee 100%);
  box-shadow:0 12px 26px rgba(53,37,19,.06);
}
.prose-card{
  padding:18px 18px 16px;
}
.prose-card p{
  color:var(--muted);
  line-height:1.9;
}
.prose-card p + p{margin-top:12px}
.signal-card{
  padding:18px;
  background:linear-gradient(180deg, #faf5ea 0%, #fffdf8 100%);
}
.signal-title{
  margin:0 0 12px;
  font-size:1.02rem;
  font-weight:700;
}
.signal-list{
  margin:0;
  padding-left:20px;
  color:var(--muted);
  line-height:1.9;
}
.signal-list li + li{margin-top:10px}

.route-grid{
  grid-template-columns:repeat(3, minmax(0,1fr));
}
.route-card{
  padding:18px;
}
.route-index{
  display:inline-grid;
  place-items:center;
  min-width:42px;
  min-height:42px;
  padding:0 12px;
  border-radius:14px;
  background:rgba(30,106,107,.1);
  color:#14555a;
  font-weight:800;
  margin-bottom:12px;
}
.route-card p,
.compare-card p{
  color:var(--muted);
  line-height:1.85;
}
.compare-grid{
  grid-template-columns:repeat(3, minmax(0,1fr));
}
.compare-card{
  padding:18px;
}
.compare-card:nth-child(2){
  background:linear-gradient(180deg, #fff8ef 0%, #f8f0e1 100%);
}
.compare-card:nth-child(3){
  background:linear-gradient(180deg, #f7fbfb 0%, #edf7f7 100%);
}

.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(0,820px);
  justify-content:center;
}
.about-card{
  margin-top:18px;
  padding:26px 22px 24px;
  border-radius:28px;
}
.about-card p{
  color:var(--muted);
  line-height:1.9;
}
.about-card p + p{margin-top:12px}
.home-link{
  margin-top:18px;
}

@media (max-width: 960px){
  .hero,
  .meaning-grid{
    grid-template-columns:1fr;
  }
  .route-grid,
  .compare-grid{
    grid-template-columns:1fr;
  }
}

@media (max-width: 720px){
  .shell{
    width:min(var(--max), calc(100vw - 18px));
    padding-top:10px;
  }
  .masthead{
    border-radius:24px;
    padding:14px 14px 12px;
    flex-wrap:wrap;
  }
  .topnav{
    margin-left:0;
    justify-content:flex-start;
  }
  .hero{
    padding:18px;
    border-radius:24px;
  }
  h1{
    max-width:100%;
    font-size:clamp(34px, 12vw, 52px);
  }
  .section{
    border-radius:24px;
    padding:18px;
  }
  .footer{
    flex-direction:column;
    align-items:flex-start;
  }
}