:root {
  --ink: #0f1d2e;
  --ink-2: #3b4a5c;
  --muted: #6a7889;
  --line: #dfe5ec;
  --bg: #ffffff;
  --bg-alt: #f4f7fa;
  --navy: #0b2340;
  --accent: #0e8f8a;
  --accent-2: #12b3ab;
  --radius: 10px;
  --wrap: 1120px;
  --font: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", "Yu Gothic", Meiryo, system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.85;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-size-adjust: 100%;
}
h1, h2, h3 { line-height: 1.4; margin: 0; }
p { margin: 0 0 1em; }
a { color: var(--accent); }

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

/* header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255,255,255,.94);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-mark { width: 32px; height: 32px; flex: none; }
.brand-mark rect { fill: var(--navy); }
.brand-mark path { stroke: var(--accent-2); }
.brand-text { font-size: 15px; letter-spacing: .04em; }
.brand-text b { font-size: 19px; margin-left: 2px; letter-spacing: .08em; }
.nav { display: flex; gap: 28px; }
.nav a { color: var(--ink-2); text-decoration: none; font-size: 14px; letter-spacing: .04em; }
.nav a:hover { color: var(--accent); }

/* hero */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, #0b2340 0%, #0f3156 55%, #0c4a5c 100%);
  color: #fff;
  padding: 120px 0 128px;
}
.hero-inner { position: relative; z-index: 1; }
.hero .eyebrow { color: var(--accent-2); }
.hero h1 { font-size: clamp(30px, 5vw, 50px); font-weight: 700; letter-spacing: .04em; margin: 12px 0 24px; }
.hero .lead { max-width: 640px; color: rgba(255,255,255,.82); font-size: 16px; }
.hero-actions { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.hero-net { position: absolute; right: -40px; top: 50%; transform: translateY(-50%); width: 620px; max-width: 70%; opacity: .5; }
.hero-net line { stroke: rgba(18,179,171,.55); stroke-width: 1.2; }
.hero-net circle { fill: #12b3ab; }

.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .22em; text-transform: uppercase; color: var(--accent); margin: 0; }

.btn {
  display: inline-block; padding: 12px 26px; border-radius: 999px;
  font-size: 14px; font-weight: 700; letter-spacing: .06em; text-decoration: none;
  transition: background .2s, color .2s, border-color .2s;
}
.btn-primary { background: var(--accent-2); color: #06222a; }
.btn-primary:hover { background: #2fd0c7; }
.btn-ghost { border: 1px solid currentColor; color: inherit; }
.hero .btn-ghost { color: #fff; border-color: rgba(255,255,255,.5); }
.hero .btn-ghost:hover { border-color: #fff; }
.access .btn-ghost { color: var(--accent); }
.access .btn-ghost:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* sections */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { margin-bottom: 44px; }
.section-head h2 { font-size: clamp(24px, 3.2vw, 32px); margin-top: 8px; letter-spacing: .05em; }
.section-lead { color: var(--ink-2); max-width: 760px; margin-top: 16px; }

.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.card {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 30px; background: #fff;
  transition: box-shadow .2s, border-color .2s;
}
.card:hover { border-color: #b9d7d6; box-shadow: 0 8px 28px rgba(11,35,64,.07); }
.card-no { font-size: 13px; font-weight: 700; color: var(--accent); letter-spacing: .1em; margin-bottom: 10px; }
.card h3 { font-size: 18px; margin-bottom: 14px; }
.card p { color: var(--ink-2); font-size: 15px; margin: 0; }

.tech-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.tech { background: #fff; border-radius: var(--radius); padding: 26px 22px; border-top: 3px solid var(--accent); }
.tech h3 { font-size: 16px; margin-bottom: 12px; }
.tech ul { margin: 0; padding-left: 1.1em; color: var(--ink-2); font-size: 14px; line-height: 1.75; }
.tech li + li { margin-top: 6px; }

.tag {
  display: inline-block; vertical-align: middle; margin-left: 10px;
  font-size: 12px; font-weight: 700; letter-spacing: .1em;
  padding: 3px 10px; border-radius: 4px; background: #e3f4f3; color: var(--accent);
}
.ai-body > p { color: var(--ink-2); max-width: 820px; }
.ai-items { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin: 32px 0; }
.ai-item { border-left: 3px solid var(--accent-2); padding: 4px 0 4px 20px; }
.ai-item h3 { font-size: 17px; margin-bottom: 8px; }
.ai-item p { color: var(--ink-2); font-size: 15px; margin: 0; }
.note { font-size: 13px; color: var(--muted) !important; }

.section-dark { background: var(--navy); color: #fff; }
.section-dark .eyebrow { color: var(--accent-2); }
.policy blockquote {
  margin: 0 0 28px; padding: 0 0 0 24px; border-left: 3px solid var(--accent-2);
  font-size: clamp(18px, 2.2vw, 22px); line-height: 1.8; font-weight: 700; max-width: 860px;
}
.policy p { color: rgba(255,255,255,.78); max-width: 860px; }

.profile { width: 100%; border-collapse: collapse; border-top: 2px solid var(--navy); }
.profile th, .profile td { text-align: left; vertical-align: top; padding: 20px 16px; border-bottom: 1px solid var(--line); font-size: 15px; }
.profile th { width: 200px; font-weight: 700; color: var(--ink); background: var(--bg-alt); }
.profile td { color: var(--ink-2); }
.purposes { margin: 0; padding-left: 1.4em; }
.purposes li + li { margin-top: 4px; }

.access-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 40px; align-items: start; }
.access h3 { font-size: 17px; margin-bottom: 10px; }
.muted { color: var(--muted); font-size: 14px; }
.map-frame { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); aspect-ratio: 4 / 3; background: #e8edf2; }
.map-frame iframe { width: 100%; height: 100%; border: 0; display: block; }

.en p { color: var(--ink-2); max-width: 860px; }

.site-footer { background: #071729; color: rgba(255,255,255,.7); padding: 40px 0; font-size: 13px; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; }
.footer-inner p { margin: 0; }
.footer-name { color: #fff; font-weight: 700; font-size: 15px; margin-bottom: 4px !important; }
.copy { color: rgba(255,255,255,.5); }

@media (max-width: 960px) {
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .nav { gap: 18px; }
}
@media (max-width: 760px) {
  .nav { display: none; }
  .hero { padding: 80px 0 88px; }
  .hero-net { opacity: .22; max-width: none; width: 520px; right: -200px; }
  .section { padding: 68px 0; }
  .cards, .ai-items, .access-grid, .tech-grid { grid-template-columns: 1fr; }
  .card { padding: 26px 22px; }
  .profile th, .profile td { display: block; width: 100%; }
  .profile th { padding: 12px 14px 8px; border-bottom: 0; }
  .profile td { padding: 6px 14px 18px; }
  .wrap { padding: 0 16px; }
}