:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-alt: #eef2f7;
  --text: #1f2937;
  --muted: #5b6472;
  --border: #d6dde8;
  --accent: #214e8a;
  --accent-dark: #163963;
  --max-width: 1080px;
  --reading-width: 860px;
  --radius: 0;
  --shadow: 0 14px 36px rgba(18, 38, 63, 0.08);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  font-family: "Yu Gothic UI", "Hiragino Sans", "Meiryo", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
  line-height: 1.7;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:focus-visible {
  outline: 3px solid rgba(33, 78, 138, 0.35);
  outline-offset: 3px;
}

.site-shell {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto;
}

.site-header {
  padding: 28px 0 20px;
}

.site-header__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.site-logo {
  width: min(220px, 60vw);
}

.site-nav {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  font-size: 0.95rem;
}

.hero,
.section-card,
.policy-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero {
  overflow: hidden;
}

.hero__image {
  aspect-ratio: 16 / 9;
  object-fit: cover;
  width: 100%;
}

.hero__body {
  padding: 28px 24px 32px;
  text-align: center;
}

.hero__title {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.3;
}

.hero__lead {
  margin: 14px auto 0;
  max-width: 48rem;
  color: var(--muted);
}

.stack {
  display: grid;
  gap: 28px;
  margin: 28px 0 56px;
}

.section-card {
  padding: 28px 24px;
}

.section-title {
  margin: 0 0 18px;
  font-size: 1.6rem;
  text-align: center;
}

.news-item {
  margin: 0;
  padding: 16px 18px;
  border-radius: 0;
  background: var(--surface-alt);
}

.news-item time {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.95rem;
}

.service-grid {
  display: grid;
  gap: 24px;
}

.service-image {
  width: 100%;
  border-radius: 0;
}

.service-title {
  margin: 0;
  font-size: 1.2rem;
  text-align: center;
}

.service-copy {
  margin: 16px 0 0;
}

.button-link {
  display: inline-block;
  margin-top: 18px;
  padding: 12px 18px;
  border-radius: 0;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
}

.button-link:hover {
  background: var(--accent-dark);
  text-decoration: none;
}

.company-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 0;
}

.company-table th,
.company-table td {
  padding: 14px 16px;
  border: 1px solid var(--border);
  vertical-align: top;
  background: #ffffff;
}

.company-table th {
  width: 28%;
  background: var(--surface-alt);
  text-align: left;
}

.site-footer {
  padding: 12px 0 40px;
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-contact {
  margin-bottom: 12px;
}

.policy-shell {
  width: min(calc(100% - 32px), var(--reading-width));
  margin: 0 auto 56px;
}

.policy-card {
  padding: 32px 24px;
}

.policy-title {
  margin: 0 0 16px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  text-align: center;
}

.policy-intro,
.policy-section p {
  margin: 0 0 16px;
}

.policy-section {
  margin-top: 28px;
}

.policy-section h2 {
  margin: 0 0 14px;
  font-size: 1.2rem;
}

.policy-list {
  padding-left: 1.25rem;
  margin: 0 0 16px;
}

.back-link {
  display: inline-block;
  margin-top: 12px;
}

@media (min-width: 760px) {
  .service-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
  }

  .section-card {
    padding: 32px;
  }
}

@media (max-width: 640px) {
  .site-shell,
  .policy-shell {
    width: min(calc(100% - 20px), var(--max-width));
  }

  .hero__body,
  .section-card,
  .policy-card {
    padding: 22px 16px;
  }

  .company-table,
  .company-table tbody,
  .company-table tr,
  .company-table th,
  .company-table td {
    display: block;
    width: 100%;
  }

  .company-table tr + tr th {
    border-top-width: 0;
  }

  .company-table td {
    border-top-width: 0;
  }
}