:root{
  color-scheme: light;
  --bg:#eef2ea;
  --paper:#fbfcf7;
  --paper-2:#f4f7ef;
  --ink:#18201d;
  --ink-2:#3f4a47;
  --muted:#66716e;
  --line:rgba(24,32,29,.12);
  --line-strong:rgba(24,32,29,.18);
  --accent:#4f7f56;
  --accent-2:#b7892f;
  --shadow:0 16px 34px rgba(25,31,28,.06);
  --radius-xl:24px;
  --radius-lg:18px;
  --radius-md:14px;
  --max:1260px;
}

*{box-sizing:border-box}
html,body{margin:0;min-width:320px;min-height:100%;scroll-behavior:smooth}
body{
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;
  line-height:1.72;
  background:
    radial-gradient(circle at 15% 12%, rgba(79,127,86,.12), transparent 24%),
    radial-gradient(circle at 85% 10%, rgba(183,137,47,.08), transparent 20%),
    linear-gradient(180deg, #f6f8f2 0%, #edf2ea 100%);
  overflow-x:hidden;
  text-rendering:optimizeLegibility;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(24,32,29,.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(24,32,29,.02) 1px, transparent 1px);
  background-size:56px 56px;
  opacity:.5;
  mask-image:linear-gradient(180deg, rgba(0,0,0,.18), transparent 84%);
}

a{color:inherit;text-decoration:none}
p,ul,ol,dl,figure,table,h1,h2,h3{margin:0}
img{display:block;max-width:100%}

.skip-link{
  position:absolute;
  left:-999px;
  top:12px;
  z-index:100;
  padding:10px 14px;
  border-radius:999px;
  background:#fff;
  color:#111;
  box-shadow:var(--shadow);
}
.skip-link:focus{left:12px}

.page{
  width:min(var(--max), calc(100vw - 24px));
  margin:0 auto;
  padding:18px 0 56px;
  position:relative;
  z-index:1;
}

.masthead{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  padding:14px 0 16px;
  border-bottom:1px solid var(--line);
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
}

.brand-mark{
  width:52px;
  height:52px;
  border-radius:18px;
  display:grid;
  place-items:center;
  flex:0 0 auto;
  background:
    linear-gradient(145deg, #d9efc8 0%, #bfdc88 42%, #95bf5d 100%);
  color:#1a211d;
  font:800 18px/1 "Songti SC","STSong","Noto Serif SC",serif;
  box-shadow:0 10px 20px rgba(79,127,86,.16);
}

.brand-copy strong{
  display:block;
  font-size:15px;
  line-height:1.12;
  font-family:"Songti SC","STSong","Noto Serif SC",serif;
  letter-spacing:.01em;
}

.brand-copy span{
  display:block;
  margin-top:4px;
  color:var(--muted);
  font-size:12px;
}

.nav{
  margin-left:auto;
  display:flex;
  flex-wrap:wrap;
  justify-content:flex-end;
  gap:14px;
}

.nav a{
  padding:6px 0;
  color:var(--muted);
  border-bottom:1px solid transparent;
  transition:border-color .18s ease,color .18s ease;
}

.nav a:hover,.nav a:focus-visible{
  color:var(--ink);
  border-bottom-color:var(--accent);
  outline:none;
}

.layout{
  display:grid;
  grid-template-columns:250px minmax(0,1fr);
  gap:26px;
  align-items:start;
  margin-top:22px;
}

.rail{
  position:sticky;
  top:16px;
  align-self:start;
  display:grid;
  gap:16px;
}

.rail-card,
.hero,
.definition-item,
.store-card,
.compare-item,
.close-card,
.about-card,
.about-note{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
}

.rail-card{
  padding:16px;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--accent);
  font-weight:700;
}

.rail-link{
  display:block;
  padding:10px 0;
  border-bottom:1px solid var(--line);
  color:var(--ink);
}

.rail-link:last-of-type{border-bottom:0;padding-bottom:0}

.rail-list{
  margin:10px 0 0;
  padding-left:18px;
  color:var(--ink-2);
}

.content{
  min-width:0;
}

.panel{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius-xl);
  box-shadow:var(--shadow);
}

.hero{
  display:grid;
  grid-template-columns:minmax(0,1fr) 360px;
  gap:18px;
  align-items:stretch;
  padding:18px;
}

.hero-copy{
  min-width:0;
  display:flex;
  flex-direction:column;
  gap:16px;
  padding:6px 4px 6px 4px;
}

h1,h2,h3{
  font-family:"Songti SC","STSong","Noto Serif SC",serif;
  line-height:1.16;
  color:var(--ink);
}

h1{font-size:clamp(2.2rem, 4.6vw, 4.2rem);letter-spacing:-.02em}
h2{font-size:clamp(1.4rem, 2.2vw, 2rem);letter-spacing:-.01em}
h3{font-size:1.06rem}

.lead{
  max-width:62ch;
  color:var(--ink-2);
  font-size:1.03rem;
}

.hero-points{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  list-style:none;
  padding:0;
}

.hero-points li{
  padding:8px 12px;
  border-radius:999px;
  background:var(--paper-2);
  border:1px solid rgba(24,32,29,.08);
  color:var(--ink);
  font-size:.95rem;
}

.hero-figure{
  margin:0;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:12px;
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:22px;
}

.hero-figure img{
  width:100%;
  height:auto;
  border-radius:16px;
  background:#fff;
}

.hero-figure figcaption{
  color:var(--muted);
  font-size:.92rem;
}

.section{
  margin-top:20px;
  padding-top:20px;
  border-top:1px solid var(--line);
}

.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  margin-bottom:14px;
}

.section-head p{
  max-width:40rem;
  color:var(--muted);
  font-size:.96rem;
}

.definition-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:14px;
}

.definition-item{
  padding:16px;
}

.definition-item dt{
  font-weight:700;
  color:var(--accent);
}

.definition-item dd{
  margin-top:6px;
  color:var(--ink-2);
}

.numbered-list{
  list-style:none;
  padding:0;
  margin:0;
  display:grid;
  gap:12px;
}

.numbered-list li{
  display:grid;
  grid-template-columns:42px minmax(0,1fr);
  gap:12px;
  align-items:start;
  padding:14px 0;
  border-bottom:1px dashed var(--line);
}

.numbered-list li:last-child{
  border-bottom:0;
  padding-bottom:0;
}

.number{
  width:42px;
  height:42px;
  border-radius:50%;
  display:grid;
  place-items:center;
  background:rgba(79,127,86,.11);
  color:var(--accent);
  font-weight:800;
}

.numbered-list p{
  color:var(--ink-2);
}

.store-grid,
.compare-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px;
}

.store-card,
.compare-item{
  padding:16px;
}

.store-card ul{
  padding-left:18px;
  color:var(--ink-2);
}

.compare-item dt{
  font-weight:700;
  color:var(--accent);
}

.compare-item dd{
  margin-top:6px;
  color:var(--ink-2);
}

.close-card{
  padding:22px;
}

.close-card h2{
  margin-top:8px;
  max-width:16ch;
}

.close-card p{
  color:var(--ink-2);
  max-width:62ch;
}

.close-link{
  margin-top:12px;
}

.close-link a,
.home-link a{
  color:var(--accent);
  font-weight:700;
  border-bottom:1px solid currentColor;
}

.footer{
  margin-top:24px;
  padding-top:18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  border-top:1px solid var(--line);
  color:var(--muted);
}

.page-about{
  width:min(1140px, calc(100vw - 24px));
}

.masthead-about{
  margin-bottom:18px;
}

.about-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 280px;
  gap:18px;
  align-items:start;
}

.about-card{
  padding:24px;
}

.about-card .lead{
  margin-top:14px;
}

.about-section{
  margin-top:18px;
  padding-top:18px;
  border-top:1px solid var(--line);
}

.about-section h2{
  font-size:1.2rem;
}

.about-section p{
  margin-top:8px;
  color:var(--ink-2);
}

.about-side{
  display:grid;
  gap:14px;
  align-content:start;
}

.about-note{
  padding:16px;
}

.about-note p:last-child{
  color:var(--ink-2);
  margin-top:8px;
}

@media (max-width: 1024px){
  .layout,
  .about-layout{
    grid-template-columns:1fr;
  }

  .rail{
    position:static;
    order:2;
  }

  .content{
    order:1;
  }

  .definition-grid,
  .store-grid,
  .compare-grid{
    grid-template-columns:1fr;
  }

  .hero{
    grid-template-columns:1fr;
  }
}

@media (max-width: 720px){
  .page,
  .page-about{
    width:min(calc(100vw - 18px), var(--max));
    padding-top:12px;
  }

  .masthead{
    align-items:flex-start;
    flex-direction:column;
  }

  .nav{
    justify-content:flex-start;
    gap:10px 14px;
  }

  .footer{
    flex-direction:column;
    align-items:flex-start;
  }

  .hero{
    padding:14px;
  }

  .section-head{
    flex-direction:column;
    align-items:flex-start;
  }

  .numbered-list li{
    grid-template-columns:36px minmax(0,1fr);
  }

  .number{
    width:36px;
    height:36px;
  }
}