:root {
  --bg: #ffffff;
  --text: #111111;
  --muted: #6b7280;
  --header-bg: #050505;
  --header-text: #f5f5f5;
  --line: rgba(0, 0, 0, 0.08);
  --surface: #ffffff;
  --surface-muted: #f2f2f2;
  --shadow: 0 14px 40px rgba(0, 0, 0, 0.18);
  --primary: #2f55ff;
  --primary-hover: #2446db;
  --radius: 14px;
  --max: 1120px;
  --hero-image: none;
  --contact-image: none;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", "Noto Sans JP", "Yu Gothic", "Meiryo", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

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

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

.container {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 10px 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  transform: translateY(-200%);
  z-index: 9999;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.96), rgba(0, 0, 0, 0.9));
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(10px);
}

.header-inner {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand-logo {
  height: 28px;
  width: auto;
}

.nav {
  display: flex;
  gap: 26px;
  align-items: center;
}

.nav-link {
  color: rgba(255, 255, 255, 0.86);
  font-size: 14px;
  letter-spacing: 0.04em;
  padding: 10px 2px;
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.65);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 160ms ease;
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

.site-main {
  min-height: 70vh;
}

.hero {
  min-height: 520px;
  display: grid;
  align-items: center;
  background-image: linear-gradient(
      180deg,
      rgba(0, 0, 0, 0.3),
      rgba(0, 0, 0, 0.6)
    ),
    var(--hero-image),
    radial-gradient(
      80% 80% at 30% 20%,
      rgba(46, 214, 255, 0.45),
      rgba(31, 60, 255, 0.12) 40%,
      rgba(0, 0, 0, 0.88) 100%
    );
  background-size: cover;
  background-position: center;
  color: #fff;
}

.hero-inner {
  padding: 84px 0;
}

.hero-title {
  margin: 0;
  font-size: clamp(34px, 4vw, 56px);
  letter-spacing: 0.02em;
  line-height: 1.25;
  font-weight: 800;
  text-shadow: 0 10px 30px rgba(0, 0, 0, 0.55);
}

.section {
  padding: 84px 0;
}

.section--service {
  background: #fff;
}

.section--company {
  background: #fff;
}

.section-head {
  display: grid;
  gap: 18px;
  margin-bottom: 28px;
}

.section-title {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin: 0;
}

.section-title-en {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.section-title-ja {
  font-size: 18px;
  font-weight: 700;
  color: rgba(0, 0, 0, 0.64);
}

.section-rule {
  width: 52px;
  height: 4px;
  background: #111;
  border-radius: 999px;
}

.service-list {
  margin: 0;
  padding-left: 1.2em;
  color: rgba(0, 0, 0, 0.7);
  font-size: 16px;
  display: grid;
  gap: 16px;
}

.company-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}

.company-table {
  margin: 0;
}

.company-row {
  display: grid;
  grid-template-columns: 240px 1fr;
  border-top: 1px solid var(--line);
}

.company-row:first-child {
  border-top: 0;
}

.company-row dt {
  margin: 0;
  padding: 22px 18px;
  background: var(--surface-muted);
  color: rgba(0, 0, 0, 0.7);
  font-weight: 700;
  text-align: center;
}

.company-row dd {
  margin: 0;
  padding: 22px 22px;
  color: rgba(0, 0, 0, 0.72);
}

.company-inline-list {
  margin: 0;
  padding-left: 1.2em;
  display: grid;
  gap: 10px;
}

.section--contact {
  position: relative;
  padding: 0;
  color: #fff;
}

.contact-bg {
  min-height: 760px;
  background-image: linear-gradient(
      180deg,
      rgba(0, 0, 0, 0.25),
      rgba(0, 0, 0, 0.72)
    ),
    var(--contact-image),
    linear-gradient(135deg, rgba(3, 3, 3, 1), rgba(17, 24, 39, 1));
  background-size: cover;
  background-position: center;
}

.contact-inner {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 64px 0;
}

.contact-title {
  font-size: 38px;
  margin: 0 0 22px;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-shadow: 0 14px 30px rgba(0, 0, 0, 0.55);
}

.contact-form {
  width: min(820px, 100%);
  display: grid;
  gap: 18px;
  padding: 26px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(8px);
}

.contact-lead {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 14px;
  line-height: 1.7;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.button--secondary {
  background: rgba(255, 255, 255, 0.92);
  color: #111;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.button--secondary:hover {
  background: rgba(255, 255, 255, 1);
}

.contact-email {
  margin: 0;
  color: rgba(255, 255, 255, 0.85);
  font-size: 13px;
}

.contact-email-value {
  font-weight: 800;
  letter-spacing: 0.02em;
}

.field {
  display: grid;
  gap: 10px;
  text-align: left;
}

.field-label {
  font-size: 14px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
}

.field-input,
.field-textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.95);
  color: #111;
  font-size: 16px;
  padding: 14px 14px;
  outline: none;
}

.field-textarea {
  resize: vertical;
  min-height: 160px;
}

.field-input:focus,
.field-textarea:focus {
  border-color: rgba(47, 85, 255, 0.75);
  box-shadow: 0 0 0 4px rgba(47, 85, 255, 0.18);
}

.button {
  border: 0;
  border-radius: 999px;
  padding: 14px 18px;
  font-weight: 800;
  font-size: 16px;
  cursor: pointer;
}

.button--primary {
  background: var(--primary);
  color: #fff;
  transition: transform 120ms ease, background-color 120ms ease;
}

.button--primary:hover {
  background: var(--primary-hover);
}

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

.form-note {
  margin: 0;
  min-height: 1.6em;
  color: rgba(255, 255, 255, 0.9);
  font-size: 13px;
  text-align: center;
}

.site-footer {
  background: #fff;
  border-top: 1px solid var(--line);
}

.footer-inner {
  padding: 26px 0;
  display: flex;
  justify-content: flex-end;
  color: rgba(0, 0, 0, 0.64);
}

@media (max-width: 820px) {
  .header-inner {
    height: 70px;
  }

  .nav {
    gap: 16px;
  }

  .nav-link {
    font-size: 13px;
  }

  .brand-logo {
    height: 26px;
  }

  .section {
    padding: 64px 0;
  }

  .section-title-en {
    font-size: 40px;
  }

  .company-row {
    grid-template-columns: 140px 1fr;
  }

  .company-row dt,
  .company-row dd {
    padding: 18px 14px;
  }

  .contact-form {
    padding: 18px;
  }
}

@media (max-width: 520px) {
  .container {
    width: min(var(--max), calc(100% - 32px));
  }

  .nav {
    gap: 12px;
  }

  .nav-link {
    padding: 8px 2px;
  }

  .hero {
    min-height: 420px;
  }

  .contact-bg {
    min-height: 720px;
  }

  .company-row {
    grid-template-columns: 1fr;
  }

  .company-row dt {
    text-align: left;
  }

  .footer-inner {
    justify-content: center;
    text-align: center;
  }
}