:root {
  --ink: #20252b;
  --muted: #66717d;
  --line: #dbe1e4;
  --paper: #f7f6f2;
  --white: #ffffff;
  --gold: #a98542;
  --blue: #355a70;
  --blue-soft: #e7eef2;
  --shadow: 0 20px 50px rgba(20, 29, 36, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Meiryo", "Noto Sans JP", Arial, sans-serif;
  line-height: 1.7;
}

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

.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  right: 0;
  left: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 72px;
  padding: 0 clamp(18px, 4vw, 56px);
  background: rgba(247, 246, 242, 0.88);
  border-bottom: 1px solid rgba(219, 225, 228, 0.75);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: var(--white);
  background: var(--ink);
  border: 1px solid rgba(255, 255, 255, 0.36);
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: clamp(18px, 4vw, 42px);
  color: var(--muted);
  font-size: 14px;
}

.header-action,
.primary-link,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  font-weight: 700;
  font-size: 14px;
}

.header-action,
.primary-link {
  color: var(--white);
  background: var(--ink);
  border-color: var(--ink);
}

.secondary-link {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.86);
}

.hero {
  position: relative;
  display: grid;
  align-items: center;
  min-height: min(820px, 92vh);
  padding: 112px clamp(20px, 6vw, 82px) 72px;
  overflow: hidden;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(247, 246, 242, 0.96) 0%, rgba(247, 246, 242, 0.82) 38%, rgba(247, 246, 242, 0.24) 74%),
    linear-gradient(180deg, rgba(247, 246, 242, 0.72), rgba(247, 246, 242, 0.16));
}

.hero-content {
  position: relative;
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(64px, 12vw, 148px);
  line-height: 0.9;
  font-weight: 500;
}

.hero-subtitle {
  margin: 22px 0 0;
  color: var(--blue);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700;
}

.hero-copy {
  max-width: 560px;
  margin: 22px 0 0;
  color: #3e4851;
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.section {
  padding: 84px clamp(20px, 6vw, 82px);
}

.section-heading {
  max-width: 760px;
}

h2 {
  margin: 0;
  max-width: 880px;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.2;
  font-weight: 700;
}

h3 {
  margin: 0 0 10px;
  font-size: 18px;
  line-height: 1.35;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.8fr);
  gap: clamp(28px, 6vw, 72px);
  background: var(--white);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.intro > p,
.demo p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.fit-list,
.feature-grid {
  display: grid;
  gap: 16px;
  margin-top: 34px;
}

.fit-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.fit-list article,
.feature-grid article,
.contact-lines {
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.fit-list article {
  padding: 26px;
}

.fit-list span {
  display: block;
  margin-bottom: 18px;
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 34px;
}

.fit-list p,
.feature-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.features {
  background: #eef2f0;
}

.feature-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-grid article {
  min-height: 168px;
  padding: 24px;
}

.feature-grid article:nth-child(3),
.feature-grid article:nth-child(4) {
  background: var(--blue-soft);
}

.demo {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  color: var(--white);
  background: var(--ink);
}

.demo .eyebrow {
  color: #d8bb7f;
}

.demo h2,
.demo p {
  color: var(--white);
}

.demo .primary-link {
  color: var(--ink);
  background: var(--white);
  border-color: var(--white);
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(300px, 0.75fr);
  gap: clamp(28px, 6vw, 72px);
  background: var(--white);
}

.contact-lines {
  padding: 10px 26px;
}

.contact-lines p {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 18px;
  margin: 0;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.contact-lines p:last-child {
  border-bottom: 0;
}

.contact-lines strong {
  color: var(--gold);
}

.contact-lines span {
  color: var(--muted);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(20px, 6vw, 82px);
  color: rgba(255, 255, 255, 0.74);
  background: #171b1f;
  font-size: 14px;
}

@media (max-width: 860px) {
  .site-header {
    grid-template-columns: auto auto;
  }

  .nav-links {
    display: none;
  }

  .header-action {
    justify-self: end;
  }

  .hero {
    min-height: 760px;
    padding-top: 104px;
  }

  .hero-shade {
    background:
      linear-gradient(180deg, rgba(247, 246, 242, 0.97) 0%, rgba(247, 246, 242, 0.86) 50%, rgba(247, 246, 242, 0.34) 100%);
  }

  .intro,
  .contact,
  .demo {
    grid-template-columns: 1fr;
  }

  .fit-list,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .demo .primary-link {
    width: 100%;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (min-width: 861px) and (max-width: 1180px) {
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}