:root {
  --bg: #f5f5f3;
  --surface: rgba(255, 255, 255, 0.72);
  --text: #171717;
  --muted: #6b6b6b;
  --line: rgba(23, 23, 23, 0.08);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.06);
  --radius: 24px;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(0, 0, 0, 0.03), transparent 28%),
    linear-gradient(180deg, #f7f7f5 0%, #f1f1ef 100%);
  line-height: 1.8;
  position: relative;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(0, 0, 0, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.5), transparent 90%);
  pointer-events: none;
  z-index: 0;
}

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

.hero,
.container,
.footer {
  position: relative;
  z-index: 1;
}

.hero {
  min-height: 20vh;
  display: flex;
  align-items: center;
  padding: 48px 24px;
}

.hero-inner {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 16px;
  font-size: 0.84rem;
  letter-spacing: 0.18em;
  color: var(--muted);
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 9vw, 7rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  max-width: 900px;
}

.lead {
  margin-top: 28px;
  max-width: 700px;
  font-size: clamp(1rem, 2.2vw, 1.4rem);
  color: #333;
}

.brand-card {
  margin-bottom: 3em;
}

.hero-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 140px;
  padding: 14px 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  transition: 0.2s ease;
  font-weight: 600;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background: #171717;
  color: #fff;
  box-shadow: var(--shadow);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 96px;
}

.section {
  margin-bottom: 28px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.section-label {
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

h2 {
  margin: 0 0 14px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.2;
}

p {
  margin: 0;
}

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

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

.clean-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.clean-list li:last-child {
  border-bottom: none;
}

.info-list {
  margin: 0;
}

.info-list > div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 8px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.info-list > div:last-child {
  border-bottom: none;
}

dt {
  color: var(--muted);
}

dd {
  margin: 0;
  font-weight: 600;
}

.contact-mail {
  margin-top: 16px;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: 700;
  word-break: break-word;
}

.contact-mail a {
  border-bottom: 1px solid rgba(23, 23, 23, 0.2);
}

.footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 40px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 820px) {
  .hero {
    min-height: auto;
    padding-top: 96px;
    padding-bottom: 56px;
  }

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

  .card {
    padding: 24px;
  }

  .info-list > div {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .lead br {
    display: none;
  }
}