:root {
  --color-bg: #f6f2ea;
  --color-bg-soft: #eee7dc;
  --color-surface: #fbfaf6;
  --color-text: #17130f;
  --color-text-soft: #3a332c;
  --color-muted: #756d62;
  --color-border: rgba(23, 19, 15, 0.16);
  --color-border-strong: rgba(23, 19, 15, 0.32);
  --color-accent: #0f3d2e;
  --color-accent-hover: #0a2f24;
  --color-accent-foreground: #fffdf7;
  --color-gold: #b08a45;
  --font-sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", "Meiryo", system-ui, sans-serif;
  --container: 1120px;
  --container-wide: 1320px;
  --section-y: clamp(72px, 10vw, 144px);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: clamp(15px, 0.35vw + 14px, 18px);
  line-height: 1.85;
}

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

h1,
h2,
h3 {
  margin: 0;
  color: var(--color-text);
  font-weight: 700;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

h1 {
  max-width: 11em;
  font-size: clamp(42px, 7vw, 88px);
  line-height: 1.05;
}

h2 {
  max-width: 12em;
  font-size: clamp(30px, 4.5vw, 60px);
  line-height: 1.12;
}

h3 {
  max-width: 18em;
  font-size: clamp(21px, 2vw, 30px);
  line-height: 1.25;
}

p {
  max-width: 38em;
  margin: 0;
  color: var(--color-muted);
}

.topbar {
  display: flex;
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.topbar__brand {
  display: grid;
  gap: 5px;
}

.topbar__label,
.section-kicker,
.eyebrow {
  margin: 0 0 18px;
  color: var(--color-gold);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.topbar__title {
  color: var(--color-text);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.topbar__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.topbar__nav a {
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
  color: var(--color-text-soft);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.topbar__nav a:hover {
  border-bottom-color: var(--color-accent);
  color: var(--color-accent);
}

.hero {
  display: grid;
  width: min(calc(100% - 40px), var(--container-wide));
  margin-inline: auto;
  padding: clamp(72px, 10vw, 132px) 0;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.55fr);
  gap: clamp(48px, 8vw, 112px);
  align-items: center;
}

.lead {
  max-width: 34em;
  margin-top: 28px;
  color: var(--color-text-soft);
  font-size: clamp(17px, 1.1vw, 21px);
  font-weight: 500;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button-primary,
.button-secondary {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding-inline: 22px;
  border-radius: 999px;
  font-weight: 700;
  line-height: 1.2;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.button-primary {
  border: 1px solid var(--color-accent);
  background: var(--color-accent);
  color: var(--color-accent-foreground);
}

.button-primary:hover {
  border-color: var(--color-accent-hover);
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

.button-secondary {
  border: 1px solid var(--color-border-strong);
  background: transparent;
  color: var(--color-text);
}

.section {
  padding: var(--section-y) 0;
}

.section-soft {
  background: var(--color-bg-soft);
}

.feature-layout {
  display: grid;
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(40px, 7vw, 96px);
  align-items: start;
}

.section-copy {
  margin-top: 24px;
}

.feature-list,
.comparison-rows,
.process-rail {
  border-top: 1px solid var(--color-border);
}

.feature-row,
.comparison-rows > div {
  display: grid;
  grid-template-columns: minmax(140px, 0.42fr) minmax(0, 0.58fr);
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
}

.comparison-rows span {
  color: var(--color-text);
  font-weight: 700;
}

.process-rail {
  margin: 0;
  padding: 0;
  list-style: none;
}

.process-rail li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 8px 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--color-border);
}

.process-rail li span {
  grid-row: span 2;
  color: var(--color-gold);
  font-weight: 700;
}

.process-rail li strong {
  color: var(--color-text);
  font-size: 18px;
  line-height: 1.4;
}

.process-rail li p {
  font-size: 14px;
  line-height: 1.7;
}

.final-band {
  display: flex;
  width: min(calc(100% - 40px), var(--container));
  margin: 0 auto var(--section-y);
  padding: clamp(44px, 7vw, 76px) 0;
  border-top: 1px solid var(--color-border-strong);
  border-bottom: 1px solid var(--color-border-strong);
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

@media (max-width: 1024px) {
  .topbar {
    align-items: flex-start;
  }

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

@media (max-width: 640px) {
  :root {
    --section-y: 72px;
  }

  .topbar,
  .hero,
  .feature-layout,
  .final-band {
    width: min(calc(100% - 28px), var(--container));
  }

  .topbar {
    display: grid;
    padding: 18px 0;
  }

  .topbar__nav {
    overflow-x: auto;
    flex-wrap: nowrap;
  }

  .hero {
    padding: 64px 0 72px;
    gap: 42px;
  }

  h1 {
    font-size: clamp(40px, 12vw, 54px);
    line-height: 1.08;
  }

  h2 {
    font-size: clamp(30px, 9vw, 42px);
  }

  .feature-row,
  .comparison-rows > div {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 24px 0;
  }

  .final-band {
    display: grid;
    margin-bottom: 72px;
  }

  .button-primary,
  .button-secondary {
    width: 100%;
  }
}