* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-text: #1a1a1a;
  --color-muted: #6b6b6b;
  --color-border: #e5e5e5;
  --color-bg: #ffffff;
  --color-bg-alt: #fafafa;
  --color-accent: #2c5f4f;
  --max-width: 960px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", "Meiryo UI", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.7;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 32px 0;
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: rgba(255, 255, 255, 0.92);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.site-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.3;
}

.site-title .ja {
  display: block;
}

.site-title .en {
  display: block;
  font-size: 11px;
  color: var(--color-muted);
  letter-spacing: 0.05em;
  font-weight: 400;
  margin-top: 2px;
}

.site-nav {
  display: flex;
  gap: 24px;
  font-size: 14px;
}

.site-nav a {
  color: var(--color-text);
}

/* Hero */
.hero {
  padding: 96px 0 80px;
  text-align: center;
  background: var(--color-bg);
}

.hero-title {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 24px;
  line-height: 1.4;
}

.hero-lead {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 2;
}

/* Section */
.section {
  padding: 80px 0;
}

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

.section-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 32px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-text);
  display: inline-block;
}

.section-text {
  font-size: 15px;
  line-height: 2;
  color: var(--color-text);
  max-width: 720px;
}

/* Services */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 16px;
}

.service-card {
  background: var(--color-bg);
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.service-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
}

.service-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.service-link {
  font-size: 13px;
  display: inline-block;
}

.service-link::before {
  content: "→ ";
}

/* Company table */
.company-table {
  width: 100%;
  max-width: 720px;
  border-collapse: collapse;
  font-size: 14px;
}

.company-table th,
.company-table td {
  padding: 16px 12px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
  text-align: left;
}

.company-table th {
  width: 140px;
  color: var(--color-muted);
  font-weight: 500;
}

/* Contact */
.contact-mail {
  margin-top: 24px;
  font-size: 18px;
  font-weight: 500;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  text-align: center;
  font-size: 12px;
  color: var(--color-muted);
}

/* Responsive */
@media (max-width: 640px) {
  .site-header {
    padding: 20px 0;
  }
  .site-nav {
    gap: 16px;
    font-size: 13px;
  }
  .hero {
    padding: 64px 0 56px;
  }
  .hero-title {
    font-size: 24px;
  }
  .section {
    padding: 56px 0;
  }
  .company-table th {
    width: 100px;
  }
  .company-table th,
  .company-table td {
    font-size: 13px;
  }
}