:root{
  --blue-50:#EFF4FB;
  --blue-100:#DCE7F7;
  --blue-200:#C4D7F1;
  --blue-500:#3B7DD8;
  --blue-600:#2563EB;
  --blue-700:#1D4ED8;
  --blue-800:#1E3A8A;
  --ink-900:#0F1E36;
  --ink-800:#1F2A44;
  --ink-700:#334155;
  --ink-600:#475569;
  --ink-500:#64748B;
  --ink-400:#94A3B8;
  --ink-300:#CBD5E1;
  --ink-200:#E2E8F0;
  --ink-100:#F1F5F9;
  --ink-50:#F8FAFC;
  --orange:#F59225;
  --orange-d:#E47C0E;
  --bg:#fff;
  --bg-soft:#F6F8FB;
  --max:1120px;
  --font-jp:system-ui,-apple-system,"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic UI","Yu Gothic","Meiryo",sans-serif;
  --shadow:0 1px 2px rgba(15,23,42,.04),0 4px 12px rgba(15,23,42,.05);
  --shadow-h:0 8px 24px rgba(15,23,42,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background:var(--bg);color:var(--ink-900);font-family:var(--font-jp);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;font-feature-settings:"palt"}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--ink-100)}
.header-row{max-width:1440px;margin:0 auto;padding:14px clamp(18px,2.2vw,44px);display:flex;align-items:center;gap:clamp(12px,1.4vw,28px)}
.header-brand{flex-shrink:0}
.header-brand img{height:38px;width:auto}
.header-nav{display:flex;flex:1;justify-content:flex-end;gap:clamp(12px,1vw,24px);margin:0 clamp(6px,.8vw,24px)}
.header-nav a{font-size:clamp(14px,1vw,16px);font-weight:600;color:var(--ink-800);white-space:nowrap}
.header-nav a:hover{color:var(--blue-600)}
.header-cta{display:flex;gap:10px;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:8px;font-weight:700;font-size:14px;border:1.5px solid transparent;padding:11px 18px;line-height:1.1;transition:.15s;white-space:nowrap}
.btn-outline{background:#fff;color:var(--ink-900);border-color:var(--ink-300)}
.btn-primary{background:var(--orange);color:#fff;border-color:var(--orange);box-shadow:0 2px 0 rgba(180,95,0,.15)}
.btn-primary:hover{background:var(--orange-d);border-color:var(--orange-d)}
.breadcrumb{padding:22px 0 0;font-size:13px;color:var(--ink-500)}
.breadcrumb a:hover{color:var(--blue-600)}
.hero{margin-top:24px;padding:44px 0 48px;background:var(--bg-soft);border-top:1px solid var(--ink-100);border-bottom:1px solid var(--ink-100)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:56px;align-items:center}
.hero-label{display:inline-flex;align-items:center;gap:8px;margin-bottom:13px;font-size:14px;font-weight:700;color:var(--blue-700)}
.hero-label:before{content:"";width:20px;height:3px;background:var(--blue-600);border-radius:3px}
.hero h1{margin:0 0 18px;font-size:42px;line-height:1.35;font-weight:800;letter-spacing:-.025em;color:var(--ink-900)}
.hero p{margin:0;max-width:720px;font-size:16px;line-height:1.9;color:var(--ink-600)}
.hero-nav{background:#fff;border:1px solid var(--ink-200);border-radius:14px;padding:22px 22px 18px;box-shadow:var(--shadow)}
.hero-nav-title{margin:0 0 10px;font-size:15px;font-weight:800;color:var(--ink-900)}
.hero-nav a{display:flex;align-items:center;justify-content:space-between;padding:11px 0;border-top:1px solid var(--ink-100);font-size:14px;font-weight:700;color:var(--ink-700)}
.hero-nav a:first-of-type{border-top:none}
.hero-nav a span{color:var(--blue-600);font-size:17px}
.hero-nav a:hover{color:var(--blue-600)}
.section{padding:72px 0}
.section-soft{background:var(--bg-soft)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:28px}
.section-copy{max-width:700px}
.section-kicker{margin:0 0 6px;font-size:13px;font-weight:700;color:var(--blue-700)}
.section-title{margin:0;font-size:30px;line-height:1.45;font-weight:800;letter-spacing:-.02em;color:var(--ink-900)}
.section-lead{margin:8px 0 0;font-size:15px;line-height:1.85;color:var(--ink-600)}
.section-link{display:inline-flex;align-items:center;gap:8px;color:var(--blue-600);font-size:14px;font-weight:800;white-space:nowrap}
.latest-list{margin:0;padding:0;list-style:none;border-top:1px solid var(--ink-200);background:#fff}
.latest-item{border-bottom:1px solid var(--ink-200)}
.latest-link{display:grid;grid-template-columns:150px minmax(0,1fr) 28px;gap:18px;align-items:center;padding:18px 8px;transition:.18s}
.latest-link:hover{background:#FBFDFF;padding-left:14px}
.latest-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.latest-date{font-size:12px;font-weight:700;letter-spacing:.02em;color:var(--ink-500);white-space:nowrap}
.latest-tag{display:inline-flex;align-items:center;padding:4px 8px;border-radius:999px;background:var(--blue-50);color:var(--blue-700);font-size:11px;font-weight:800;white-space:nowrap}
.latest-title{font-size:16px;font-weight:700;line-height:1.65;color:var(--ink-900);min-width:0}
.latest-arrow{color:var(--blue-600);font-size:19px;font-weight:800;text-align:right}
.latest-note{margin:14px 0 0;font-size:12px;line-height:1.7;color:var(--ink-500)}
.featured-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.featured-card{min-height:178px;padding:22px 22px 20px;background:#fff;border:1px solid var(--ink-200);border-radius:12px;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:.18s}
.featured-card:hover{transform:translateY(-2px);border-color:var(--blue-200);box-shadow:var(--shadow-h)}
.card-label{font-size:12px;font-weight:800;color:var(--blue-700);margin-bottom:10px}
.featured-card h3{margin:0;font-size:18px;line-height:1.55;color:var(--ink-900)}
.featured-card p{margin:9px 0 18px;font-size:14px;line-height:1.75;color:var(--ink-600)}
.card-arrow{margin-top:auto;color:var(--blue-600);font-weight:800;font-size:15px}
.issue-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.issue-card{min-height:164px;padding:22px;background:#fff;border:1px solid var(--ink-200);border-radius:12px;display:flex;flex-direction:column;transition:.18s}
.issue-card:hover{border-color:var(--blue-200);background:#FBFDFF}
.issue-no{font-size:12px;font-weight:800;color:var(--blue-600)}
.issue-card h3{margin:12px 0 7px;font-size:17px;line-height:1.55;color:var(--ink-900)}
.issue-card p{margin:0;font-size:14px;line-height:1.7;color:var(--ink-600)}
.issue-card .card-arrow{margin-top:auto;padding-top:12px}
.comparison-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.series-card{background:#fff;border:1px solid var(--ink-200);border-radius:14px;padding:22px 24px 8px;box-shadow:var(--shadow)}
.series-card h3{margin:0 0 8px;font-size:20px;line-height:1.5;color:var(--ink-900)}
.series-list{margin:0;padding:0;list-style:none}
.series-list li{border-top:1px solid var(--ink-200)}
.series-list a{display:grid;grid-template-columns:1fr 26px;gap:14px;align-items:center;padding:17px 0;color:#17385E;font-size:15px;font-weight:700;line-height:1.55}
.series-list a:hover{color:var(--blue-600)}
.series-list b{color:var(--blue-600);font-size:19px;text-align:right}
.comparison-footer{display:flex;justify-content:center;margin-top:26px}
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.topic-card{padding:22px;background:#fff;border:1px solid var(--ink-200);border-radius:12px;min-height:210px;box-shadow:var(--shadow)}
.topic-card h3{margin:0 0 14px;font-size:18px;color:var(--ink-900)}
.topic-links{display:grid;gap:0}
.topic-links a{padding:9px 0;border-top:1px solid var(--ink-100);font-size:14px;font-weight:700;color:var(--ink-700)}
.topic-links a:first-child{border-top:0}
.topic-links a:hover{color:var(--blue-600)}
.media-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.media-card{min-height:74px;padding:16px 18px;background:#fff;border:1px solid var(--ink-200);border-radius:10px;display:flex;align-items:center;justify-content:space-between;gap:14px;font-size:15px;font-weight:700;color:var(--ink-800);transition:.18s}
.media-card:hover{border-color:var(--blue-200);background:#FBFDFF;color:var(--blue-700)}
.media-card span:last-child{color:var(--blue-600);font-size:18px}
.case-card{display:grid;grid-template-columns:1.05fr .95fr;overflow:hidden;border:1px solid var(--ink-200);border-radius:14px;background:#fff;box-shadow:var(--shadow)}
.case-image{padding:16px;background:#F6F9FD;border-right:1px solid var(--ink-200);display:flex;align-items:center}
.case-image img{width:100%;height:auto;object-fit:cover;border-radius:8px}
.case-copy{padding:28px}
.case-tag{display:inline-flex;padding:5px 9px;background:var(--blue-50);color:var(--blue-700);border-radius:6px;font-size:12px;font-weight:800}
.case-company{margin:12px 0 6px;font-size:14px;font-weight:800;color:var(--ink-600)}
.case-copy h3{margin:0 0 12px;font-size:22px;line-height:1.6;color:var(--ink-900)}
.case-copy p{margin:0 0 14px;font-size:15px;line-height:1.85;color:var(--ink-600)}
.case-link{color:var(--blue-600);font-size:14px;font-weight:800}
.cta{padding:48px 0 54px;background:var(--blue-700);color:#fff}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px}
.cta-copy h2{margin:0 0 8px;font-size:28px;line-height:1.5}
.cta-copy p{margin:0;font-size:15px;color:#D7E4FF}
.cta-actions{display:flex;gap:10px}
.cta .btn-outline{background:#fff;border-color:#fff;color:var(--ink-900)}
.footer{background:var(--ink-50);border-top:1px solid var(--ink-200)}
.footer-inner{padding:34px 24px;display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center}
.footer img{width:190px;height:auto}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-links a{font-size:13px;font-weight:700;color:var(--ink-600)}
.footer-meta{grid-column:1/-1;margin:0;font-size:12px;line-height:1.8;color:var(--ink-500)}
@media(max-width:980px){
  .header-nav{display:none}
  .hero-grid{grid-template-columns:1fr;gap:24px}
  .hero-nav{max-width:none}
  .featured-grid,.issue-grid{grid-template-columns:repeat(2,1fr)}
  .topic-grid{grid-template-columns:repeat(2,1fr)}
  .media-grid{grid-template-columns:repeat(2,1fr)}
  .case-card{grid-template-columns:1fr}
  .case-image{border-right:0;border-bottom:1px solid var(--ink-200)}
}
@media(max-width:680px){
  .container{padding:0 16px}
  .header-row{padding:10px 14px}
  .header-brand img{height:31px}
  .header-cta .btn-outline{display:none}
  .header-cta .btn{font-size:12px;padding:10px 13px}
  .breadcrumb{padding-top:17px}
  .hero{margin-top:16px;padding:34px 0 36px}
  .hero h1{font-size:30px;line-height:1.45}
  .hero p{font-size:15px}
  .section{padding:52px 0}
  .section-head{align-items:flex-start;flex-direction:column;gap:12px;margin-bottom:22px}
  .section-title{font-size:24px}
  .featured-grid,.issue-grid,.comparison-grid,.topic-grid,.media-grid{grid-template-columns:1fr}
  .latest-link{grid-template-columns:1fr 24px;gap:8px 12px;padding:15px 4px}
  .latest-meta{grid-column:1/2}
  .latest-title{grid-column:1/2;font-size:15px}
  .latest-arrow{grid-column:2;grid-row:1/3;align-self:center}
  .featured-card,.issue-card{min-height:auto}
  .series-card{padding:20px 18px 6px}
  .case-copy{padding:22px 20px}
  .case-copy h3{font-size:19px}
  .cta-inner{align-items:flex-start;flex-direction:column}
  .cta-actions{width:100%;display:grid;grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr}
}