:root {
  color-scheme: light;
  --paper: #f7f8f4;
  --paper-deep: #ecefe8;
  --ink: #17211c;
  --muted: #68756d;
  --line: rgba(23, 33, 28, 0.14);
  --accent: #4d6f5f;
  --accent-strong: #243f36;
  --white: #ffffff;
  font-family:
    ui-serif, "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", Georgia,
    serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--paper);
}

body {
  min-height: 100%;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 16%, rgba(77, 111, 95, 0.11), transparent 26rem),
    linear-gradient(145deg, var(--paper), var(--paper-deep));
}

a {
  color: inherit;
  text-decoration: none;
}

.page {
  width: min(1180px, calc(100% - 40px));
  min-height: 100svh;
  margin: 0 auto;
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  gap: clamp(28px, 4vw, 52px);
  padding: 28px 0 22px;
}

.site-header,
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  font-family:
    ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

.brand {
  font-size: 16px;
  font-weight: 650;
  letter-spacing: 0;
}

.signal {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(360px, 1fr);
  align-items: center;
  gap: clamp(32px, 6vw, 80px);
}

.hero-copy {
  max-width: 520px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(46px, 5.8vw, 86px);
  font-weight: 520;
  line-height: 1.08;
  letter-spacing: 0;
}

h1 span {
  display: block;
}

.lead {
  margin-top: 32px;
  font-size: clamp(24px, 4vw, 46px);
  font-weight: 500;
  line-height: 1.18;
  letter-spacing: 0;
}

.summary {
  max-width: 420px;
  margin-top: 24px;
  color: var(--muted);
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.9;
  letter-spacing: 0;
}

.hero-visual {
  position: relative;
  margin: 0;
  aspect-ratio: 1.32;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 26px 70px rgba(31, 42, 35, 0.18);
  background: #dde3dc;
}

.hero-visual::after {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background: linear-gradient(180deg, rgba(247, 248, 244, 0) 62%, rgba(247, 248, 244, 0.22));
}

.hero-visual img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.principles article {
  min-height: 142px;
  padding: 24px 26px 26px;
  border-right: 1px solid var(--line);
}

.principles article:last-child {
  border-right: 0;
}

.principles span {
  display: block;
  color: var(--accent);
  font-family:
    ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 12px;
  letter-spacing: 0.18em;
}

.principles h2 {
  margin-top: 18px;
  font-size: 22px;
  font-weight: 520;
  line-height: 1.2;
  letter-spacing: 0;
}

.principles p {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.site-footer {
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
}

.site-footer a {
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

@media (max-width: 860px) {
  .page {
    width: min(100% - 28px, 720px);
    gap: 30px;
    padding-top: 22px;
  }

  .site-header {
    align-items: flex-start;
  }

  .signal {
    max-width: 140px;
    text-align: right;
    line-height: 1.5;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero-copy {
    max-width: none;
  }

  h1 {
    font-size: clamp(42px, 12vw, 64px);
  }

  .lead {
    margin-top: 24px;
    max-width: 11em;
  }

  .summary {
    max-width: 30em;
  }

  .hero-visual {
    aspect-ratio: 1.18;
  }

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

  .principles article {
    min-height: 0;
    padding: 22px 0 24px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .principles article:last-child {
    border-bottom: 0;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
}

@media (max-width: 420px) {
  .page {
    width: min(100% - 22px, 380px);
  }

  .hero-visual {
    margin-inline: -11px;
    border-radius: 0;
  }
}