:root {
  color-scheme: light dark;
  --paper: #f7f0df;
  --paper-raised: #fffaf0;
  --ink: #2f241d;
  --muted: #6b5a4e;
  --cinnabar: #934623;
  --cinnabar-soft: #f3b08b;
  --jade: #3e6b60;
  --line: rgba(72, 52, 38, 0.18);
  --shadow: 0 18px 54px rgba(68, 43, 27, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #191714;
    --paper-raised: #24201b;
    --ink: #f5ead8;
    --muted: #c9b9a5;
    --cinnabar: #e79a72;
    --cinnabar-soft: #6c3b29;
    --jade: #8eb9aa;
    --line: rgba(245, 234, 216, 0.16);
    --shadow: 0 18px 54px rgba(0, 0, 0, 0.28);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 88% 4%, color-mix(in srgb, var(--cinnabar-soft) 25%, transparent), transparent 34rem),
    linear-gradient(180deg, var(--paper-raised), var(--paper));
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  line-height: 1.65;
  min-height: 100vh;
}

a { color: var(--cinnabar); text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 0.14em; }
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--jade);
  outline-offset: 4px;
  border-radius: 6px;
}

.shell { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }

header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper-raised) 88%, transparent);
  backdrop-filter: blur(18px);
}

.nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand { color: var(--ink); text-decoration: none; font-size: 1.16rem; font-weight: 760; }
.brand span { color: var(--cinnabar); margin-left: 0.35rem; }
.nav-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 16px; }
.nav-links a { color: var(--muted); text-decoration: none; font-weight: 600; }
.nav-links a[aria-current="page"] { color: var(--cinnabar); }

main { padding: 46px 0 70px; }
.hero { display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 34px; align-items: center; }
.eyebrow { color: var(--cinnabar); font-weight: 760; letter-spacing: 0.05em; text-transform: uppercase; }
h1 { margin: 8px 0 18px; font-size: clamp(2.5rem, 7vw, 5.4rem); line-height: 1.02; letter-spacing: -0.045em; }
h2 { margin: 0 0 12px; font-size: clamp(1.65rem, 3vw, 2.35rem); line-height: 1.18; }
h3 { margin: 0 0 8px; font-size: 1.12rem; }
p { margin: 0 0 16px; }
.lead { max-width: 720px; color: var(--muted); font-size: clamp(1.08rem, 2vw, 1.28rem); }
.actions { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 12px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-raised);
  color: var(--ink);
  text-decoration: none;
  font-weight: 720;
}
.button.primary { background: var(--cinnabar); color: #fffaf4; border-color: transparent; }

.rice-card {
  aspect-ratio: 1;
  max-width: 360px;
  justify-self: center;
  display: grid;
  place-items: center;
  position: relative;
  border: 2px solid color-mix(in srgb, var(--cinnabar) 62%, transparent);
  border-radius: 24px;
  background: color-mix(in srgb, var(--paper-raised) 92%, transparent);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.rice-card::before, .rice-card::after {
  content: "";
  position: absolute;
  inset: 50% 0 auto;
  border-top: 1px dashed color-mix(in srgb, var(--cinnabar) 48%, transparent);
}
.rice-card::after { transform: rotate(90deg); }
.diagonal { position: absolute; inset: 0; background: linear-gradient(45deg, transparent 49.8%, color-mix(in srgb, var(--cinnabar) 32%, transparent) 50%, transparent 50.2%); }
.diagonal.second { transform: rotate(90deg); }
.glyph { position: relative; z-index: 2; font-family: "Kaiti SC", "STKaiti", serif; font-size: clamp(7rem, 18vw, 12rem); color: var(--ink); }

.section { margin-top: 56px; }
.section-intro { max-width: 760px; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 22px; }
.card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: color-mix(in srgb, var(--paper-raised) 93%, transparent);
  box-shadow: 0 12px 34px rgba(68, 43, 27, 0.07);
}
.card p { color: var(--muted); }
.tag { display: inline-block; margin-bottom: 10px; padding: 4px 9px; border-radius: 999px; background: color-mix(in srgb, var(--cinnabar-soft) 36%, transparent); color: var(--ink); font-size: 0.84rem; font-weight: 700; }

.prose { max-width: 840px; }
.prose section { margin: 0 0 34px; }
.prose ul { padding-left: 1.3rem; }
.prose li { margin-bottom: 8px; }
.notice { margin: 22px 0; padding: 18px 20px; border-left: 4px solid var(--jade); border-radius: 12px; background: color-mix(in srgb, var(--jade) 10%, var(--paper-raised)); }

footer { border-top: 1px solid var(--line); padding: 28px 0 42px; color: var(--muted); }
.footer-row { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-links { display: flex; flex-wrap: wrap; gap: 14px; }

@media (max-width: 780px) {
  .nav { align-items: flex-start; padding: 14px 0; }
  .nav-links { gap: 10px 14px; }
  .hero { grid-template-columns: 1fr; }
  .rice-card { width: min(84vw, 320px); order: -1; }
  .grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}