:root {
  --bg: #ffffff;
  --bg-alt: #f6f7fb;
  --ink: #0b1320;
  --ink-soft: #3a4256;
  --muted: #6b7388;
  --line: #e4e7ef;
  --accent: #2f5bff;
  --accent-deep: #1a3fd6;
  --radius: 12px;
  --max-w: 1120px;
  --shadow-sm: 0 1px 2px rgba(11, 19, 32, 0.04), 0 1px 1px rgba(11, 19, 32, 0.03);
  --shadow-md: 0 8px 24px rgba(11, 19, 32, 0.06), 0 2px 6px rgba(11, 19, 32, 0.04);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Noto Sans JP", "Inter", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Helvetica, Arial, sans-serif;
  font-feature-settings: "palt";
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover { color: var(--accent-deep); }

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 10px 14px;
  z-index: 1000;
}
.skip-link:focus { left: 16px; top: 16px; color: #fff; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: 0.04em;
}
.brand:hover { color: var(--ink); }

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--ink), #1f2a44);
  color: #fff;
  font-family: "Inter", sans-serif;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-name {
  font-family: "Inter", sans-serif;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav a {
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 500;
}
.site-nav a:hover { color: var(--ink); }

.nav-cta {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  color: var(--ink) !important;
}
.nav-cta:hover {
  background: var(--ink);
  color: #fff !important;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 112px;
  background:
    radial-gradient(1100px 500px at 90% -10%, rgba(47, 91, 255, 0.10), transparent 60%),
    radial-gradient(800px 400px at -10% 30%, rgba(11, 19, 32, 0.05), transparent 60%),
    #fff;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(11, 19, 32, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 19, 32, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(900px 500px at 70% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(900px 500px at 70% 30%, #000 30%, transparent 75%);
  pointer-events: none;
}

.hero-inner { position: relative; }

.eyebrow {
  display: inline-block;
  margin: 0 0 16px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink-soft);
  font-family: "Inter", sans-serif;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero-title {
  margin: 0 0 24px;
  font-size: clamp(34px, 5.4vw, 60px);
  line-height: 1.25;
  letter-spacing: 0.01em;
  font-weight: 700;
}

.accent {
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-deep) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  max-width: 640px;
  color: var(--ink-soft);
  font-size: 17px;
  margin: 0 0 36px;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-lg { padding: 16px 32px; font-size: 16px; }

.btn-primary {
  background: var(--ink);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: #000;
  color: #fff;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover {
  background: #fff;
  border-color: var(--ink);
  color: var(--ink);
}

/* Sections */
.section {
  padding: 104px 0;
  border-top: 1px solid var(--line);
}
.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
}

.section-head {
  margin: 0 auto 56px;
  text-align: center;
  max-width: 680px;
}
.section-head h2 {
  margin: 8px 0 12px;
  font-size: clamp(26px, 3.2vw, 36px);
  letter-spacing: 0.02em;
  font-weight: 700;
}
.section-lead {
  color: var(--ink-soft);
  margin: 0;
  font-size: 16px;
}

/* Service cards */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 28px 32px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: #cfd5e3;
}

.card-num {
  font-family: "Inter", sans-serif;
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.2em;
  margin-bottom: 14px;
  font-weight: 600;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 1.85;
}

/* Approach steps */
.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: step;
}

.steps li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}

.step-num {
  display: inline-block;
  font-family: "Inter", sans-serif;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.22em;
  margin-bottom: 12px;
}

.steps h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
}
.steps p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 1.85;
}

/* Company table */
.company-table {
  margin: 0;
  max-width: 880px;
  margin-inline: auto;
  border-top: 1px solid var(--line);
}
.company-table .row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  padding: 22px 8px;
  border-bottom: 1px solid var(--line);
}
.company-table dt {
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 14.5px;
  letter-spacing: 0.04em;
}
.company-table dd {
  margin: 0;
  color: var(--ink);
  font-size: 15.5px;
  line-height: 1.9;
}

/* Contact */
.section-contact {
  background:
    radial-gradient(700px 360px at 50% 0%, rgba(47, 91, 255, 0.10), transparent 70%),
    var(--bg-alt);
}
.contact { text-align: center; }
.contact .btn { margin-top: 8px; }
.contact-note {
  margin-top: 16px;
  color: var(--muted);
  font-size: 13px;
}

/* Footer */
.site-footer {
  background: var(--ink);
  color: #c8cee0;
  padding: 36px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
}
.footer-brand .brand-mark {
  background: rgba(255, 255, 255, 0.08);
}
.footer-brand .brand-name {
  font-family: "Inter", sans-serif;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #fff;
}
.copyright {
  margin: 0;
  font-size: 13px;
  color: #9aa3bd;
  letter-spacing: 0.02em;
}

/* Responsive */
@media (max-width: 960px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .section { padding: 84px 0; }
}

@media (max-width: 720px) {
  .header-inner { height: 60px; }
  .site-nav ul { gap: 18px; }
  .site-nav li:not(:last-child) { display: none; }
  .hero { padding: 72px 0 88px; }
  .cards { grid-template-columns: 1fr; }
  .company-table .row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 18px 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}