:root {
  --ink: #172b3c;
  --muted: #5c6e7a;
  --blue: #087cbd;
  --blue-deep: #075d8d;
  --blue-soft: #edf8fd;
  --orange: #f5a300;
  --green: #83c83a;
  --pink: #eb5da8;
  --line: #dce8ee;
  --surface: #f6fafc;
  --night: #102d43;
  --white: #fff;
  --shadow: 0 16px 40px rgba(22, 57, 78, .09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif; line-height: 1.75; }
img { display: block; max-width: 100%; }
a { color: inherit; }

.site-header { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; min-height: 84px; padding: 10px max(24px, calc((100vw - 1180px) / 2)); background: rgba(255,255,255,.94); border-bottom: 1px solid rgba(220,232,238,.9); backdrop-filter: blur(14px); }
.archive-header { justify-content: center; position: static; border-bottom: 0; }
.brand-link { display: block; width: 320px; max-width: 48vw; }
.brand-logo { width: 100%; height: 62px; object-fit: contain; }
.section-nav { display: flex; align-items: center; gap: 24px; font-size: 13px; font-weight: 700; }
.section-nav a { text-decoration: none; }
.section-nav a:hover { color: var(--blue); }

.hero { width: min(1180px, calc(100% - 40px)); margin: 34px auto 0; display: grid; grid-template-columns: 1.12fr .88fr; align-items: center; min-height: 600px; overflow: hidden; border: 1px solid var(--line); border-radius: 30px; background: radial-gradient(circle at 10% 12%, rgba(131,200,58,.15), transparent 25%), radial-gradient(circle at 90% 15%, rgba(235,93,168,.12), transparent 23%), linear-gradient(140deg,#f4fbff 0%,#fff 52%,#fff9e9 100%); box-shadow: var(--shadow); }
.hero-copy { padding: 64px clamp(32px,6vw,84px); }
.issue-label { display: inline-flex; gap: 10px; align-items: center; margin: 0 0 28px; padding: 5px 12px; color: var(--blue-deep); background: var(--blue-soft); border-radius: 999px; font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.issue-label span { color: var(--muted); }
.eyebrow { margin: 0 0 10px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .15em; }
.hero h1 { margin: 0; font-size: clamp(38px,5.5vw,68px); line-height: 1.25; letter-spacing: -.03em; }
.hero-lead { max-width: 650px; margin: 26px 0 0; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 22px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 54px; padding: 13px 24px; border-radius: 12px; font-weight: 800; text-decoration: none; transition: transform .16s ease, box-shadow .16s ease, background .16s ease; }
.button:hover { transform: translateY(-2px); }
.button:focus-visible, .card-link:focus-visible, .image-link:focus-visible, .learning-card a:focus-visible, .community-card:focus-visible, .issue-card:focus-visible { outline: 3px solid rgba(245,163,0,.62); outline-offset: 4px; }
.button-primary { color: var(--white); background: var(--blue); box-shadow: 0 12px 26px rgba(8,124,189,.24); }
.button-primary:hover { background: var(--blue-deep); }
.text-link { color: var(--blue-deep); font-weight: 800; text-underline-offset: 4px; }
.hero-visual { align-self: stretch; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 52px; color: var(--white); background: linear-gradient(150deg,#0f4669,#087cbd); }
.hero-image-wrap { width: min(360px,100%); padding: 24px; background: #fff; border-radius: 22px; box-shadow: 0 24px 52px rgba(0,0,0,.22); transform: rotate(1.5deg); }
.hero-image-wrap img { width: 100%; aspect-ratio: 1; object-fit: contain; }
.hero-product-label { margin: 26px 0 0; text-align: center; }
.hero-product-label span { display: inline-block; margin-right: 8px; padding: 2px 8px; border: 1px solid rgba(255,255,255,.5); border-radius: 999px; font-size: 10px; font-weight: 800; letter-spacing: .12em; }
.hero-product-label strong { font-size: 21px; }

.page-section { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 94px 0; }
.intro-note { max-width: 880px; padding-bottom: 20px; text-align: center; }
.intro-note p:last-child { margin: 0; color: var(--muted); font-size: 18px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 36px; }
.section-heading h2 { margin: 0; font-size: clamp(30px,4vw,46px); line-height: 1.25; }
.section-heading > p { max-width: 460px; margin: 0; color: var(--muted); font-size: 14px; }
.featured-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.product-card { overflow: hidden; border: 1px solid var(--line); border-radius: 20px; background: #fff; transition: transform .18s ease, box-shadow .18s ease; }
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.image-link { display: flex; align-items: center; justify-content: center; background: var(--surface); text-decoration: none; }
.featured-card .image-link { aspect-ratio: 16/11; padding: 22px; }
.image-link img { width: 100%; height: 100%; object-fit: contain; }
.card-body { padding: 22px; }
.company-name { margin: 0 0 5px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .04em; }
.card-body h3 { margin: 0; font-size: 18px; line-height: 1.45; }
.card-body > p:not(.company-name) { margin: 10px 0 0; color: var(--muted); font-size: 13px; }
.card-link { display: inline-block; margin-top: 17px; color: var(--blue-deep); font-size: 13px; font-weight: 800; text-decoration: none; }
.subsection-heading { margin: 76px 0 24px; }
.subsection-heading h3 { margin: 0; font-size: 26px; }
.subsection-heading p { margin: 5px 0 0; color: var(--muted); font-size: 14px; }
.product-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.compact-card .image-link { aspect-ratio: 1.25; padding: 18px; }
.compact-card .card-body { padding: 17px; }
.compact-card .card-body h3 { font-size: 15px; }

.learning-section { width: 100%; max-width: none; padding: 88px max(24px,calc((100vw - 1120px)/2)); color: var(--white); background: var(--night); }
.inverse-heading .eyebrow, .learning-card .company-name { color: #67c8f3; }
.inverse-heading > p { color: #b9ccd8; }
.learning-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.learning-card { padding: 25px; border: 1px solid rgba(255,255,255,.13); border-radius: 17px; background: rgba(255,255,255,.055); }
.learning-card a { position: relative; display: block; padding: 12px 24px 12px 0; color: #fff; border-top: 1px solid rgba(255,255,255,.12); font-size: 14px; font-weight: 700; line-height: 1.55; text-decoration: none; }
.learning-card a::after { position: absolute; right: 2px; content: "↗"; color: #67c8f3; }
.learning-card a:hover { color: #aee5fb; }

.community-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 18px; }
.community-card { display: grid; grid-template-columns: 126px 1fr; gap: 22px; align-items: center; padding: 20px; border: 1px solid var(--line); border-radius: 18px; text-decoration: none; transition: transform .18s ease, box-shadow .18s ease; }
.community-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.community-card img { width: 126px; height: 126px; padding: 4px; object-fit: contain; border-radius: 12px; background: var(--surface); }
.community-card h3 { margin: 0; font-size: 18px; }
.community-card p { margin: 5px 0 9px; color: var(--muted); font-size: 13px; }
.community-card span { color: var(--blue-deep); font-size: 12px; font-weight: 800; }

.closing-cta { margin-top: 42px; padding: 78px 24px; text-align: center; background: linear-gradient(135deg,var(--blue-soft),#fff8e7); }
.closing-cta h2 { max-width: 720px; margin: 0 auto; font-size: clamp(28px,4vw,42px); line-height: 1.4; }
.button-secondary { margin-top: 28px; color: var(--white); background: var(--ink); }
.button-secondary:hover { background: var(--blue-deep); }
.site-footer { padding: 38px 20px 42px; color: var(--muted); border-top: 1px solid var(--line); text-align: center; font-size: 11px; }
.site-footer p { margin: 3px 0; }

.archive-main { width: min(960px,calc(100% - 40px)); margin: 0 auto; padding-bottom: 100px; }
.archive-hero { padding: 80px 20px 60px; text-align: center; }
.archive-hero h1 { margin: 0; font-size: clamp(36px,6vw,58px); }
.archive-hero > p:last-child { max-width: 620px; margin: 20px auto 0; color: var(--muted); }
.archive-list { padding-top: 30px; }
.compact-heading { margin-bottom: 20px; }
.issue-card { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 30px; color: inherit; border: 1px solid var(--line); border-radius: 20px; text-decoration: none; transition: transform .18s ease,box-shadow .18s ease; }
.issue-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.issue-date { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .1em; }
.issue-card h3 { margin: 7px 0 0; font-size: 22px; }
.issue-card p { margin: 5px 0 0; color: var(--muted); font-size: 14px; }
.arrow { display: grid; flex: 0 0 44px; width: 44px; height: 44px; place-items: center; color: var(--white); background: var(--blue); border-radius: 50%; }

@media (max-width: 900px) {
  .section-nav { display: none; }
  .site-header { justify-content: center; min-height: 70px; }
  .brand-link { width: 260px; max-width: 70vw; }
  .brand-logo { height: 50px; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-copy { padding: 48px 34px; }
  .hero-visual { padding: 42px; }
  .hero-image-wrap { width: 290px; }
  .section-heading { align-items: start; flex-direction: column; gap: 12px; }
  .featured-grid { grid-template-columns: 1fr 1fr; }
  .featured-card:first-child { grid-column: 1/-1; display: grid; grid-template-columns: 1fr 1fr; }
  .product-grid { grid-template-columns: repeat(3,1fr); }
  .learning-grid { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 640px) {
  html { scroll-padding-top: 78px; }
  .site-header { min-height: 62px; padding: 5px 12px; }
  .brand-link { width: 220px; }
  .brand-logo { height: 46px; }
  .hero { width: calc(100% - 24px); margin-top: 14px; border-radius: 20px; }
  .hero-copy { padding: 38px 22px 42px; }
  .hero h1 { font-size: 39px; }
  .hero-lead { font-size: 15px; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 14px; }
  .button { width: 100%; }
  .text-link { text-align: center; }
  .hero-visual { padding: 34px 24px; }
  .hero-image-wrap { width: 230px; }
  .page-section { width: calc(100% - 28px); padding: 68px 0; }
  .intro-note { padding-bottom: 10px; }
  .intro-note p:last-child { font-size: 15px; }
  .section-heading { margin-bottom: 25px; }
  .section-heading h2 { font-size: 31px; }
  .featured-grid, .product-grid, .learning-grid, .community-grid { grid-template-columns: 1fr; }
  .featured-card:first-child { display: block; grid-column: auto; }
  .featured-card .image-link { aspect-ratio: 1.3; }
  .subsection-heading { margin-top: 60px; }
  .compact-product-grid { grid-template-columns: repeat(2,1fr); gap: 12px; }
  .compact-card .card-body { padding: 13px; }
  .compact-card .card-body h3 { font-size: 13px; }
  .learning-section { padding: 66px 14px; }
  .community-card { grid-template-columns: 96px 1fr; gap: 15px; padding: 15px; }
  .community-card img { width: 96px; height: 96px; }
  .closing-cta { margin-top: 0; padding: 62px 20px; }
  .archive-main { width: calc(100% - 28px); }
  .archive-hero { padding: 52px 0 42px; }
  .issue-card { padding: 22px; }
  .issue-card p { display: none; }
  .issue-card h3 { font-size: 17px; }
}