:root {
  --navy: #001a38;
  --navy-2: #082b5a;
  --blue: #1d6bff;
  --blue-2: #3b82ff;
  --ink: #0b214a;
  --text: #25354f;
  --muted: #66758d;
  --offwhite: #f8f7f3;
  --white: #ffffff;
  --pale: #edf3ff;
  --line: #d9e2f0;
  --soft-line: rgba(16,48,94,.10);
  --shadow: 0 22px 60px rgba(0,26,56,.10);
  --radius: 24px;
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "IBM Plex Sans", "IBM Plex Sans JP", "Noto Sans JP", "Yu Gothic UI", "Yu Gothic", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--offwhite);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link { position: absolute; left: -9999px; top: 10px; z-index: 999; background:#fff; color:var(--navy); padding:10px 14px; }
.skip-link:focus { left: 10px; }
.container { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; }
.eyebrow { font-size: .78rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; color: var(--blue); }
.kicker { color: var(--muted); font-size: 1rem; max-width: 760px; }
.section { padding: 104px 0; }
.section.compact { padding: 76px 0; }
.section.white { background: var(--white); }
.section.navy { background: var(--navy); color: #fff; }
.section-title { color: var(--ink); font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1.08; letter-spacing: -.04em; margin: 14px 0 24px; }
.section.navy .section-title { color: #fff; }
.lede { font-size: clamp(1.06rem, 2vw, 1.24rem); max-width: 820px; color: var(--muted); }
.section.navy .lede { color: #c5d2e5; }
.rule { width: 64px; height: 5px; background: var(--blue); border-radius: 99px; margin: 28px 0; }

.site-header { position: sticky; top:0; z-index:50; background: rgba(0,26,56,.96); border-bottom: 1px solid rgba(255,255,255,.08); backdrop-filter: blur(12px); }
.header-inner { min-height: 78px; display:flex; align-items:center; justify-content:space-between; gap:24px; }
.brand { display:inline-flex; align-items:center; text-decoration:none; min-width: 190px; }
.brand img { width: 210px; height: 70px; object-fit: cover; object-position: center; border-radius: 3px; }
.nav { display:flex; gap: 28px; align-items:center; }
.nav a { color:#dce7f8; text-decoration:none; font-size:.94rem; font-weight:600; }
.nav a:hover, .nav a[aria-current="page"] { color:#fff; }
.nav a[aria-current="page"]::after { content:""; display:block; height:2px; background:var(--blue); margin-top:5px; }
.menu-button { display:none; background:none; border:1px solid rgba(255,255,255,.28); color:#fff; border-radius:10px; padding:9px 12px; font-size:.9rem; }

.hero { position:relative; overflow:hidden; background: var(--navy); color:#fff; min-height: 700px; display:flex; align-items:center; }
.hero::before { content:""; position:absolute; inset:0; background:
  radial-gradient(ellipse at 80% 5%, rgba(214,237,255,.34) 0%, rgba(88,151,255,.16) 14%, rgba(0,26,56,0) 42%),
  linear-gradient(120deg, rgba(0,26,56,1) 12%, rgba(5,42,89,.98) 58%, rgba(0,26,56,1) 100%); }
.hero::after { content:""; position:absolute; inset:0; opacity:.14; background-image:
  linear-gradient(rgba(155,198,255,.4) 1px, transparent 1px),
  linear-gradient(90deg, rgba(155,198,255,.4) 1px, transparent 1px);
  background-size: 140px 140px; mask-image: linear-gradient(90deg, transparent 0%, transparent 36%, #000 67%, #000 100%); }
.hero-inner { position:relative; z-index:1; padding:110px 0 100px; }
.hero .eyebrow { color:#8fb8ff; }
.hero h1 { max-width: 950px; margin: 18px 0 30px; font-size: clamp(3rem, 7vw, 6.4rem); line-height:.98; letter-spacing:-.055em; font-weight:650; }
.hero .hero-copy { max-width:820px; font-size:clamp(1.05rem,2vw,1.28rem); color:#d0dbeb; }
.hero-actions { margin-top:42px; display:flex; flex-wrap:wrap; gap:14px; }
.btn { display:inline-flex; align-items:center; justify-content:center; gap:10px; min-height:50px; padding:0 22px; border-radius:999px; text-decoration:none; font-weight:700; border:1px solid transparent; transition:.18s ease; }
.btn.primary { background:var(--blue); color:#fff; }
.btn.primary:hover { background:#0d5cf0; transform:translateY(-1px); }
.btn.ghost { border-color:rgba(255,255,255,.30); color:#fff; background:rgba(255,255,255,.04); }
.btn.ghost:hover { background:rgba(255,255,255,.10); }
.btn.light { background:#fff; color:var(--navy); }
.btn.outline { border-color:#afc4e8; color:var(--ink); background:transparent; }
.btn.outline:hover { background:#fff; }

.grid-2 { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:30px; }
.grid-3 { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:24px; }
.grid-4 { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:20px; }
.card { background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:30px; box-shadow:0 8px 30px rgba(0,26,56,.04); }
.card h3 { color:var(--ink); margin:10px 0 12px; line-height:1.25; font-size:1.28rem; }
.card p { color:var(--muted); margin:0; }
.number { font-size:.78rem; font-weight:800; letter-spacing:.10em; color:var(--blue); }

.decision-strip { display:grid; grid-template-columns:1.05fr .95fr; gap:44px; align-items:center; }
.signal-list { display:grid; gap:12px; }
.signal { border:1px solid var(--line); background:#fff; border-radius:16px; padding:17px 18px; display:grid; grid-template-columns:130px 1fr; gap:12px; }
.signal strong { color:var(--blue); }
.signal span { color:var(--text); }

.method-steps { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-top:42px; }
.method-step { position:relative; overflow:hidden; background:#fff; border:1px solid var(--line); border-radius:26px; padding:34px; min-height:280px; }
.method-step::after { content:""; position:absolute; right:-40px; bottom:-50px; width:140px; height:140px; border-radius:50%; background:var(--pale); }
.method-step h3 { font-size:1.7rem; color:var(--ink); margin:8px 0 15px; }
.method-step ul { padding-left:20px; color:var(--muted); }

.flow { display:flex; flex-wrap:wrap; align-items:center; gap:10px; margin:34px 0; }
.flow .node { padding:14px 17px; background:#fff; border:1px solid var(--line); border-radius:14px; font-size:.9rem; color:var(--ink); font-weight:700; }
.flow .arrow { color:var(--blue); font-weight:800; }

.example-shell { background:#fff; border:1px solid var(--line); border-radius:30px; overflow:hidden; box-shadow: var(--shadow); }
.example-top { padding:28px 30px; border-bottom:1px solid var(--line); display:flex; justify-content:space-between; gap:18px; align-items:center; }
.example-body { display:grid; grid-template-columns:1fr 1fr; }
.example-col { padding:30px; }
.example-col + .example-col { border-left:1px solid var(--line); background:#fbfcff; }
.mini-row { display:flex; gap:12px; align-items:flex-start; padding:13px 0; border-bottom:1px solid #ecf0f5; }
.mini-row:last-child { border-bottom:none; }
.mini-label { min-width:105px; color:var(--blue); font-weight:800; font-size:.85rem; }

.product-card { display:grid; grid-template-columns:.92fr 1.08fr; gap:42px; align-items:center; background:#fff; border:1px solid var(--line); border-radius:30px; padding:30px; box-shadow:var(--shadow); }
.product-card img { border-radius:20px; border:1px solid #e4e9f1; max-height:560px; margin:auto; }
.price { font-size:2rem; color:var(--ink); font-weight:750; margin:18px 0; }
.meta-line { display:flex; flex-wrap:wrap; gap:8px; margin:18px 0 26px; }
.pill { display:inline-flex; align-items:center; padding:7px 12px; border-radius:999px; background:var(--pale); color:var(--ink); font-size:.82rem; font-weight:700; }

.insight-card { display:flex; flex-direction:column; min-height:310px; }
.insight-card .tag { color:var(--blue); font-size:.78rem; font-weight:800; letter-spacing:.10em; text-transform:uppercase; }
.insight-card h3 { font-size:1.6rem; letter-spacing:-.025em; }
.insight-card .link { margin-top:auto; padding-top:28px; color:var(--ink); font-weight:800; text-decoration:none; }
.insight-card .link:hover { color:var(--blue); }

.page-hero { padding:110px 0 84px; background:linear-gradient(135deg,#001a38 0%,#062b5e 70%,#001a38 100%); color:#fff; position:relative; overflow:hidden; }
.page-hero::after { content:""; position:absolute; inset:0; opacity:.12; background-image:linear-gradient(rgba(155,198,255,.5) 1px, transparent 1px), linear-gradient(90deg, rgba(155,198,255,.5) 1px, transparent 1px); background-size:120px 120px; }
.page-hero .container { position:relative; z-index:1; }
.page-hero h1 { font-size:clamp(2.7rem,6vw,5.2rem); line-height:1.01; letter-spacing:-.05em; margin:15px 0 24px; max-width:950px; }
.page-hero p { max-width:820px; color:#d3dfef; font-size:1.16rem; }

.article { max-width:820px; margin:0 auto; }
.article h2 { color:var(--ink); font-size:2rem; margin-top:60px; line-height:1.25; }
.article h3 { color:var(--ink); margin-top:36px; }
.article p, .article li { font-size:1.05rem; }
.article blockquote { margin:38px 0; padding:26px 28px; background:#fff; border-left:5px solid var(--blue); border-radius:0 18px 18px 0; color:var(--ink); font-size:1.2rem; }
.article .note { padding:22px; background:var(--pale); border-radius:18px; color:var(--text); }

.principle { padding:28px 0; border-top:1px solid var(--line); display:grid; grid-template-columns:90px 1fr; gap:24px; }
.principle:first-child { border-top:none; }
.principle .index { font-weight:800; color:var(--blue); }
.principle h3 { margin:0 0 8px; color:var(--ink); font-size:1.4rem; }
.principle p { margin:0; color:var(--muted); }

.media-pair { display:grid; grid-template-columns:1fr 1fr; gap:22px; }
.media-pair figure { margin:0; }
.media-pair img { border:1px solid var(--line); border-radius:20px; background:#fff; }
.media-pair figcaption { color:var(--muted); font-size:.88rem; margin-top:10px; }

.contact-panel { background:#fff; border:1px solid var(--line); border-radius:28px; padding:36px; max-width:850px; }
.contact-row { display:flex; justify-content:space-between; gap:24px; padding:20px 0; border-top:1px solid var(--line); align-items:center; }
.contact-row:first-of-type { margin-top:22px; }
.contact-row strong { color:var(--ink); }

.site-footer { background:#00152d; color:#b9c8db; padding:62px 0 34px; }
.footer-grid { display:grid; grid-template-columns:1.5fr 1fr 1fr; gap:42px; }
.footer-title { color:#fff; font-weight:800; font-size:1.05rem; margin-bottom:14px; }
.footer-links { display:grid; gap:9px; }
.footer-links a { color:#b9c8db; text-decoration:none; }
.footer-links a:hover { color:#fff; }
.footer-bottom { margin-top:46px; padding-top:24px; border-top:1px solid rgba(255,255,255,.10); display:flex; justify-content:space-between; gap:18px; font-size:.84rem; }

@media (max-width: 920px) {
  .container { width:min(calc(100% - 34px), var(--max)); }
  .menu-button { display:block; }
  .nav { position:absolute; top:78px; left:0; right:0; display:none; flex-direction:column; align-items:stretch; gap:0; background:#001a38; border-top:1px solid rgba(255,255,255,.08); padding:12px 18px 20px; }
  .nav.open { display:flex; }
  .nav a { padding:13px 10px; }
  .nav a[aria-current="page"]::after { display:none; }
  .brand img { width:178px; height:58px; }
  .hero { min-height:620px; }
  .hero-inner { padding:90px 0 80px; }
  .grid-3, .grid-4, .method-steps { grid-template-columns:1fr; }
  .grid-2, .decision-strip, .product-card, .example-body, .media-pair, .footer-grid { grid-template-columns:1fr; }
  .example-col + .example-col { border-left:none; border-top:1px solid var(--line); }
  .signal { grid-template-columns:100px 1fr; }
  .product-card { padding:20px; }
  .section { padding:78px 0; }
}
@media (max-width: 560px) {
  .container { width:min(calc(100% - 28px), var(--max)); }
  .hero h1 { font-size:clamp(2.3rem,10.5vw,3rem); line-height:1.02; letter-spacing:-.045em; }
  .hero-actions .btn { width:100%; }
  .section-title { font-size:2.2rem; }
  .card, .method-step { padding:24px; }
  .signal { grid-template-columns:1fr; gap:4px; }
  .principle { grid-template-columns:55px 1fr; }
  .contact-row { flex-direction:column; align-items:flex-start; }
  .footer-bottom { flex-direction:column; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior:auto !important; transition:none !important; }
}