:root {
  --bg: #f4f8fb;
  --surface: #ffffff;
  --surface-soft: #eef4f8;
  --text: #13212f;
  --muted: #4b6175;
  --line: #d7e2ec;
  --brand: #0f6fff;
  --brand-2: #00a7c4;
  --accent: #12b886;
  --shadow: 0 16px 34px rgba(19, 33, 47, 0.12);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% -8%, rgba(15, 111, 255, 0.14), transparent 36%),
    radial-gradient(circle at 92% 0%, rgba(18, 184, 134, 0.1), transparent 26%),
    var(--bg);
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; }

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(10px);
  background: rgba(244, 248, 251, 0.82);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: .02em;
}
.brand img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}
.main-nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}
.main-nav a.active,
.main-nav a:hover { color: var(--text); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  padding: 11px 16px;
  transition: transform .15s ease, box-shadow .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 10px 22px rgba(15, 111, 255, .25);
}
.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--line);
}

.hero {
  padding: 72px 0 56px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 34px;
  align-items: center;
}
.eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  background: rgba(15,111,255,.1);
  color: var(--brand);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 14px; }
h1 { font-size: clamp(32px, 5vw, 52px); letter-spacing: -.01em; }
h2 { font-size: clamp(26px, 3.6vw, 38px); letter-spacing: -.01em; }
h3 { font-size: 22px; }
.lead {
  font-size: 17px;
  color: var(--muted);
  margin-bottom: 26px;
}
.hero-media {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.section {
  padding: 28px 0 64px;
}
.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}
.section-head p { color: var(--muted); margin: 0; }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 10px 24px rgba(19, 33, 47, 0.06);
  overflow: hidden;
}
.card-body { padding: 20px; }
.card p { color: var(--muted); margin: 0; }
.card-actions {
  margin-top: 16px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.kpis {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.kpi {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
}
.kpi strong {
  font-size: 26px;
  display: block;
  line-height: 1.2;
}
.kpi span { color: var(--muted); font-size: 13px; }

.feature-list {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}
.feature-item {
  background: var(--surface-soft);
  border: 1px solid #d9e5f0;
  border-radius: 12px;
  padding: 12px 14px;
}
.feature-item strong { display: block; margin-bottom: 4px; }
.feature-item p { margin: 0; color: var(--muted); font-size: 14px; }

.cta-band {
  margin: 14px 0 68px;
  background: linear-gradient(135deg, #032b56, #085f7c 65%, #0a7f82);
  color: #e8f8ff;
  border-radius: 22px;
  padding: 34px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: center;
}
.cta-band p { margin: 0; opacity: .88; }

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(255,255,255,.6);
  padding: 24px 0;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 920px) {
  .hero-grid,
  .grid-2,
  .grid-3,
  .cta-band { grid-template-columns: 1fr; }
  .header-inner { flex-wrap: wrap; padding: 10px 0; }
  .main-nav { order: 3; width: 100%; overflow: auto; padding-bottom: 2px; }
  .main-nav a { white-space: nowrap; }
  .kpis { grid-template-columns: 1fr; }
}