@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&family=Noto+Sans+JP:wght@400;500;700&family=Outfit:wght@400;500;600;700;800&display=swap');

/* =========================================================
   Design Tokens
   ========================================================= */
:root {
  /* Primary */
  --primary-600: #3B00B9;
  --primary-500: #5E2BDB;
  --primary-400: #7B2DED;
  --primary-200: #C572EF;
  --primary-100: #EA6CFD;
  --primary-50: #F3EEFF;

  /* Neutral */
  --neutral-900: #1A1A2E;
  --neutral-700: #3A3A4A;
  --neutral-500: #6B6B80;
  --neutral-400: #9B9BB0;
  --neutral-200: #E5E5EC;
  --neutral-100: #F0F0F5;
  --neutral-50: #F8F8FB;
  --neutral-0: #FFFFFF;

  /* Dark surface */
  --dark-bg: #0D0B1A;
  --dark-elevated: rgba(255,255,255,0.07);
  --dark-elevated-hover: rgba(255,255,255,0.11);
  --dark-border: rgba(255,255,255,0.10);
  --dark-border-hover: rgba(255,255,255,0.18);
  --dark-text: rgba(255,255,255,0.93);
  --dark-text-secondary: rgba(255,255,255,0.65);
  --dark-text-tertiary: rgba(255,255,255,0.40);

  /* Aliases */
  --purple: var(--primary-600);
  --heading: var(--neutral-900);
  --body: var(--neutral-700);
  --muted: var(--neutral-500);
  --light: var(--neutral-400);
  --border: var(--neutral-200);
  --border-light: var(--neutral-100);
  --bg-page: var(--neutral-50);
  --bg-surface: var(--neutral-0);
  --bg-callout: var(--primary-50);

  /* Fonts */
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Noto Sans JP', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Radius */
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --radius-pill: 9999px;

  /* Layout */
  --max-w: 1200px;
  --reading-w: 880px;
  --px: 48px;
  --header-h: 64px;
}

/* =========================================================
   Reset
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  background: var(--bg-page);
  color: var(--body);
  line-height: 1.875;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-wrap: anywhere;
  word-break: normal;
  line-break: strict;
  overflow-x: hidden;
  max-width: 100vw;
}

a { color: var(--purple); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-500); }
img { max-width: 100%; height: auto; display: block; }

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--primary-400);
  outline-offset: 2px;
}

/* =========================================================
   Typography

   英字見出し: Outfit — display用。大きく、tight tracking。
   和文見出し: Noto Sans JP 700 — 英字より控えめに。letter-spacing 0。
   本文: Noto Sans JP 400 — line-height 広め。
   ラベル: JetBrains Mono — 最小限にのみ使用。
   ========================================================= */
h1, h2, h3, h4 {
  font-family: var(--font-body);
  color: var(--heading);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}
/* 英字ディスプレイ用 — hero等で明示的に指定 */
.display-en {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
}
h1 { font-size: clamp(2rem, 4.5vw, 3rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); }
h3 { font-size: clamp(1.125rem, 1.5vw, 1.25rem); font-weight: 700; line-height: 1.35; }
h4 { font-size: 1rem; font-weight: 600; line-height: 1.4; }
p { margin-bottom: 1.5rem; }
ul, ol { margin-left: 1.5rem; margin-bottom: 1rem; }

/* Eyebrow: JetBrains Mono — ヒーローとセクション見出し直上の1箇所にのみ */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}

.arrow-link {
  display: inline-flex; align-items: center; gap: 0.375rem;
  font-family: var(--font-body); font-weight: 600; font-size: 0.875rem;
  transition: gap 0.2s, color 0.2s;
}
.arrow-link:hover { gap: 0.625rem; }
.arrow-link::after { content: '\2192'; }

/* =========================================================
   Layout
   ========================================================= */
.container { max-width: var(--max-w); margin: 0 auto; padding-left: var(--px); padding-right: var(--px); }

/* =========================================================
   Header — transparent → solid
   ========================================================= */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h);
  background: transparent;
  border-bottom: 1px solid transparent;
  display: flex; align-items: center;
  transition: background 0.3s, border-color 0.3s;
}
.site-header.is-scrolled {
  background: rgba(13,11,26,0.92);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--dark-border);
}
.site-header.is-scrolled-light {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}
.header-inner { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.site-logo { display: flex; align-items: center; gap: 0.5rem; }
.site-logo img { height: 28px; width: auto; border-radius: 0; }
.site-logo span {
  font-family: var(--font-display); font-weight: 800;
  font-size: 1.125rem; color: #fff; letter-spacing: -0.01em;
  transition: color 0.3s;
}
.site-header.is-scrolled-light .site-logo span { color: var(--heading); }
.site-logo:hover { opacity: 0.7; }

.site-nav { display: flex; gap: 1.75rem; font-family: var(--font-body); font-weight: 500; font-size: 0.8125rem; }
.site-nav a { color: rgba(255,255,255,0.65); transition: color 0.2s; }
.site-nav a:hover { color: #fff; }
.site-nav a.is-active { color: #fff; }
.site-header.is-scrolled-light .site-nav a { color: var(--muted); }
.site-header.is-scrolled-light .site-nav a:hover { color: var(--heading); }
.site-header.is-scrolled-light .site-nav a.is-active { color: var(--purple); }

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative;
  background: var(--dark-bg);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 65% 30%, rgba(59,0,185,0.35) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 25% 75%, rgba(123,45,237,0.15) 0%, transparent 70%);
  pointer-events: none;
}

/* --- Home Hero --- */
.hero--home {
  min-height: auto;
  display: flex; align-items: center;
  padding: calc(var(--header-h) + 48px) 0 8px;
}
.hero--home .hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
.hero--home h1 {
  color: #fff;
  font-size: clamp(2.25rem, 4.5vw, 3.25rem);
  line-height: 1.2;
  margin-bottom: 1.25rem;
}
.hero--home .hero-lead {
  font-size: 1rem;
  color: var(--dark-text-secondary);
  line-height: 1.9;
  max-width: 480px;
  margin-bottom: 2rem;
}
.hero-ctas { display: flex; gap: 0.625rem; flex-wrap: wrap; }

/* --- Hero Right Panel --- */
.hero-panel { display: flex; flex-direction: column; gap: 0.75rem; }

/* Data Card — ヒーロー右のライブ情報 */
.data-card {
  background: var(--dark-elevated);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  transition: background 0.2s, border-color 0.2s;
  display: block; text-decoration: none;
}
.data-card:hover {
  background: var(--dark-elevated-hover);
  border-color: var(--dark-border-hover);
}
.data-card .card-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary-200);
  margin-bottom: 0.375rem;
}
.data-card h3 { color: var(--dark-text); font-size: 1rem; margin-bottom: 0.25rem; }
.data-card p { color: var(--dark-text-secondary); font-size: 0.875rem; line-height: 1.6; margin-bottom: 0; }
.data-card .card-meta {
  font-size: 0.8125rem; color: var(--dark-text-tertiary);
  margin-top: 0.375rem;
}

/* CTA Glass Card — 本家 caffeine/ninja スタイル */
.cta-glass {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s;
}
.cta-glass:hover {
  background: rgba(255,255,255,0.11);
  border-color: rgba(255,255,255,0.18);
}
.cta-glass-title {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: rgba(255,255,255,0.93);
  line-height: 1.4;
  margin-bottom: 0.125rem;
}
.cta-glass-sub {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.01em;
}
.cta-glass-arrow {
  font-size: 1.25rem;
  color: rgba(255,255,255,0.4);
  flex-shrink: 0;
  margin-left: 1rem;
  transition: color 0.2s;
}
.cta-glass:hover .cta-glass-arrow { color: rgba(255,255,255,0.7); }

/* --- Page Hero (subpages) --- */
.hero--page {
  padding: calc(var(--header-h) + 56px) 0 56px;
}
.hero--page .eyebrow { color: var(--primary-200); }
.hero--page h1 {
  color: #fff;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  margin-bottom: 0.75rem;
}
.hero--page h1::after { display: none; }
.hero--page p {
  font-size: 0.9375rem;
  color: var(--dark-text-secondary);
  max-width: 600px;
  margin-bottom: 0;
}

/* Hero fadeInUp */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero .container > *,
.hero .hero-grid > * {
  animation: fadeInUp 0.5s ease both;
}
.hero .hero-grid > *:nth-child(2) { animation-delay: 0.12s; }

/* =========================================================
   Dark Section
   ========================================================= */
.section-dark {
  background: var(--dark-bg);
  position: relative;
  padding: 64px 0;
}
.section-dark::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 50% 30% at 50% 0%, rgba(59,0,185,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.section-dark h2 { color: #fff; }
.section-dark p { color: var(--dark-text-secondary); }
.section-dark .eyebrow { color: var(--primary-200); }

/* --- Path Cards: 3導線 (参加・学ぶ・作る) --- */
.path-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 2.5rem;
}
.path-card {
  background: var(--dark-elevated);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem 1.75rem;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
  display: flex; flex-direction: column;
  text-decoration: none;
}
.path-card:hover {
  background: var(--dark-elevated-hover);
  border-color: var(--dark-border-hover);
  transform: translateY(-2px);
}
.path-card h3 {
  color: var(--dark-text);
  font-size: 1.125rem;
  margin-bottom: 0.625rem;
}
.path-card p {
  color: var(--dark-text-secondary);
  font-size: 0.875rem;
  line-height: 1.75;
  margin-bottom: 1rem;
  flex: 1;
}
.path-card .path-link {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8125rem;
  color: var(--primary-200);
  display: inline-flex; align-items: center; gap: 0.25rem;
  transition: gap 0.2s;
}
.path-card:hover .path-link { gap: 0.5rem; }
.path-card .path-link::after { content: '\2192'; }

/* Stats: inline in dark section */
.stats-row {
  display: flex; gap: 3rem; flex-wrap: wrap;
  padding: 2rem 0;
  border-top: 1px solid var(--dark-border);
  margin-top: 2.5rem;
}
.stat-item {}
.stat-number {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2rem;
  color: #fff;
  line-height: 1.1;
}
.stat-label {
  font-size: 0.8125rem;
  color: var(--dark-text-secondary);
  margin-top: 0.125rem;
}

/* =========================================================
   Splash Image (legacy, 未使用)
   ========================================================= */
.splash-image {
  background: var(--dark-bg);
  padding: 0 0 48px;
  margin-top: -1px; /* seamless join with hero */
}
.splash-image img {
  width: 100%;
  border-radius: var(--radius-lg);
  display: block;
}

/* =========================================================
   Hero Visual — 富士山画像を hero 右側に
   ========================================================= */
.hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  border: 1px solid rgba(255,255,255,0.08);
}
.hero-visual img {
  width: 100%;
  height: auto;
  display: block;
}
.hero-visual::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 70%, rgba(13,11,26,0.25) 100%);
  pointer-events: none;
}

/* =========================================================
   Stats Section — コミュニティ統計
   ========================================================= */
.stats-section {
  background: var(--dark-bg);
  padding: 10px 0 22px;
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-left: 1px solid rgba(255,255,255,0.08);
}
.stat-card {
  padding: 0.75rem 1.25rem;
  border-right: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.125rem;
  background: transparent;
  border-top: none;
  border-bottom: none;
  border-radius: 0;
  transition: background 0.2s;
}
.stat-card:hover {
  background: rgba(123,45,237,0.04);
  transform: none;
}
.stat-number {
  font-family: var(--font-display);
  font-size: 1.875rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 0.125rem;
  display: flex;
  align-items: baseline;
  gap: 0.15em;
}
.stat-unit {
  font-size: 0.5em;
  color: var(--primary-300);
  font-weight: 500;
}
.stat-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.01em;
}
.stat-sub {
  font-size: 0.6875rem;
  color: var(--dark-text-secondary);
  letter-spacing: 0.02em;
  line-height: 1.5;
}

/* =========================================================
   Partners Section
   ========================================================= */
.partners-section {
  background: var(--dark-bg);
  padding: 56px 0 48px;
}
.partners-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 2rem;
}
.partners-header .section-label {
  color: var(--primary-300);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.partners-header h2 {
  color: #fff;
  font-size: clamp(1.25rem, 2.4vw, 1.5rem);
  margin-bottom: 0.625rem;
}
.partners-header p {
  color: var(--dark-text-secondary);
  font-size: 0.8125rem;
  line-height: 1.75;
}
/* Partner Marquee — 右→左に無限スクロール */
.partners-marquee {
  position: relative;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.partners-marquee-track {
  display: flex;
  gap: 1rem;
  width: max-content;
  animation: partners-scroll 60s linear infinite;
}
.partners-marquee:hover .partners-marquee-track {
  animation-play-state: paused;
}
@keyframes partners-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
.partner-logo {
  flex: 0 0 auto;
  width: 150px;
  height: 80px;
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.3s, transform 0.3s;
  opacity: 0.65;
}
.partner-logo:hover {
  opacity: 1;
  transform: scale(1.05);
}
.partner-logo img {
  max-width: 100%;
  max-height: 60px;
  object-fit: contain;
  /* 白シルエット化：どんな色のロゴも純白に */
  filter: brightness(0) invert(1);
}
/* iU は SVG かつ stroke が細いので調整 */
.partner-logo img[alt*="iU"] { max-height: 48px; }

@media (prefers-reduced-motion: reduce) {
  .partners-marquee-track { animation: none; }
}

/* =========================================================
   Tech Visuals — image cards with overlay
   ========================================================= */
.tech-visuals { padding-top: 0; padding-bottom: 80px; }
.visual-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.visual-card {
  position: relative;
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  aspect-ratio: 16 / 10;
}
.visual-card img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}
.visual-card:hover img { transform: scale(1.03); }
.visual-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,11,26,0.85) 0%, rgba(13,11,26,0.2) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.25rem 1.5rem;
}
.visual-card-overlay h3 {
  color: #fff;
  font-size: 1.125rem;
  margin-bottom: 0.125rem;
}
.visual-card-overlay p {
  color: rgba(255,255,255,0.65);
  font-size: 0.8125rem;
  margin-bottom: 0;
  line-height: 1.5;
}

/* =========================================================
   Transition
   ========================================================= */
.section-transition {
  height: 48px;
  background: linear-gradient(to bottom, var(--dark-bg), #F8F9FC);
}

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex; align-items: center; gap: 0.375rem;
  padding: 0.75rem 1.5rem; border-radius: var(--radius-pill);
  font-family: var(--font-body); font-weight: 600; font-size: 0.875rem;
  border: none; cursor: pointer;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--purple); color: #fff; }
.btn-primary:hover { background: var(--primary-500); color: #fff; }
.btn-outline { background: transparent; color: var(--dark-text-secondary); border: 1.5px solid rgba(255,255,255,0.15); }
.btn-outline:hover { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.25); color: var(--dark-text); }
.btn-white { background: #fff; color: var(--purple); }
.btn-white:hover { background: var(--bg-callout); color: var(--purple); }
.btn-ghost { background: transparent; color: var(--body); border: 1.5px solid var(--border); }
.btn-ghost:hover { border-color: var(--purple); color: var(--purple); }

/* =========================================================
   Light Cards
   ========================================================= */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.375rem;
  transition: border-color 0.2s, transform 0.2s;
  display: block; text-decoration: none;
}
.card:hover { border-color: var(--purple); transform: translateY(-2px); }
.card h3 { margin-top: 0; color: var(--heading); font-size: 1.0625rem; }
.card p { color: var(--muted); font-size: 0.875rem; line-height: 1.75; margin-bottom: 0.5rem; }
.card .arrow-link { margin-top: 0.75rem; }

/* =========================================================
   Main
   ========================================================= */
.site-main { padding-top: 56px; padding-bottom: 80px; }

.section-intro { margin-bottom: 2.5rem; }
.section-intro h2 { margin-top: 0; }
.section-intro p { color: var(--muted); max-width: 640px; line-height: 1.85; }

/* =========================================================
   Editorial Section (記事一覧)
   ========================================================= */
.editorial-section { margin-top: 0; }
.editorial-section h2 { margin-bottom: 0.5rem; }
.editorial-section > p { color: var(--muted); max-width: 540px; margin-bottom: 0; }

/* =========================================================
   Article / Reading width
   ========================================================= */
.reading-width { max-width: var(--reading-w); }

.article-section { padding-top: 80px; margin-top: 80px; border-top: 1px solid var(--border); }
.article-section:first-child { border-top: none; margin-top: 0; padding-top: 0; }

.article-section h2 {
  position: relative;
  padding-bottom: 0.75rem;
}
.article-section h2::after {
  content: '';
  position: absolute; left: 0; bottom: 0;
  width: 40px; height: 2px;
  background: var(--primary-600);
  border-radius: 1px;
}

.article-section h3 {
  padding-left: 0.875rem;
  border-left: 2px solid var(--primary-600);
  margin-top: 40px;
}
.article-section h3:first-child { margin-top: 0; }
.article-section h4 { margin-top: 28px; }

/* Section label — 記事セクション内のみ。トップページでは .eyebrow を使う
   北極星パターン：letter-spacing 0.12em / margin-bottom 12px に統一 */
.section-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 12px;
  display: inline-block;
}

/* =========================================================
   北極星パターン — Section Design Tokens
   KICKER → HEADLINE → LEDE → CONTENT → CTA の5層構造
   全セクション共通のトーン・余白・スケールに統一する
   ========================================================= */
.section-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin: 0 0 12px;
  display: inline-block;
}
.section-headline {
  font-family: var(--font-body);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--heading);
  margin: 12px 0 0;
  letter-spacing: 0;
}
.section-headline::after { display: none; }
.section-lede {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 640px;
  margin: 16px 0 0;
}
.section-cta {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--purple);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 24px;
  text-decoration: none;
  transition: gap 0.2s;
}
.section-cta::after { content: '→'; }
.section-cta:hover { gap: 10px; }

/* ダーク背景下 */
.bg-dark .section-kicker { color: var(--primary-200); }
.bg-dark .section-headline { color: #fff; }
.bg-dark .section-lede { color: var(--dark-text-secondary); }
.bg-dark .section-cta { color: var(--primary-200); }
.bg-dark .section-cta:hover { color: #fff; }

/* セクション背景リズム（白→グレー→白→ダーク→白） */
.bg-white { background: var(--neutral-0); }
.bg-gray { background: #F8F9FC; }
.bg-dark-plain {
  background: var(--dark-bg);
  color: var(--dark-text);
}

/* カードメタ 区切りを「 · 」に統一 */
.card-meta-unified { display: flex; gap: 0; align-items: center; flex-wrap: wrap; font-size: 0.75rem; }
.card-meta-unified span + span::before {
  content: '·';
  margin: 0 0.5rem;
  opacity: 0.5;
}

.callout {
  background: var(--bg-callout);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}
.callout p:last-child { margin-bottom: 0; }

code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background: var(--bg-callout);
  color: var(--purple);
  padding: 2px 6px;
  border-radius: 4px;
}

/* Timeline */
.timeline { list-style: none; margin-left: 0; padding-left: 1.5rem; border-left: 2px solid var(--border); }
.timeline li {
  padding: 0.25rem 0 0.25rem 1rem;
  position: relative;
  font-size: 0.9375rem;
  line-height: 1.7;
}
.timeline li::before {
  content: '';
  position: absolute;
  left: -1.5rem; top: 0.65rem;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--purple);
  transform: translateX(-4px);
}

/* =========================================================
   Post List — Editorial Cards
   ========================================================= */
.post-list { list-style: none; display: grid; gap: 0; margin-top: 1.5rem; }

.post-item-with-thumb {
  display: flex; gap: 1.25rem;
  padding: 1.125rem 0;
  border-bottom: 1px solid var(--border-light);
  transition: background-color 0.2s;
}
.post-item-with-thumb:first-child { padding-top: 0; }
.post-item-with-thumb:last-child { border-bottom: none; }
.post-item-with-thumb:hover { background: transparent; }

.post-thumb {
  width: 128px; height: 80px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  background: var(--border-light);
}
.post-item-content { flex: 1; min-width: 0; display: flex; flex-direction: column; justify-content: center; }
.post-title {
  display: block; font-family: var(--font-body);
  font-size: 0.9375rem; font-weight: 600; color: var(--heading);
  line-height: 1.5; transition: color 0.2s;
  margin-bottom: 0.25rem;
}
.post-title:hover { color: var(--purple); }
.post-meta {
  font-size: 0.75rem; color: var(--light);
  font-family: var(--font-mono); font-weight: 400;
}
.post-item-content p { margin-bottom: 0; font-size: 0.8125rem; color: var(--muted); line-height: 1.6; }

/* =========================================================
   UseCase Grid
   ========================================================= */
.usecase-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem; margin-top: 1.5rem;
}
.usecase-card {
  display: block; text-decoration: none;
  background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}
.usecase-card:hover { border-color: var(--purple); transform: translateY(-2px); }
.usecase-card img { width: 100%; height: 150px; object-fit: cover; }
.usecase-card p { padding: 0.875rem 1.25rem; font-size: 0.9375rem; font-weight: 500; margin-bottom: 0; color: var(--heading); }
.usecase-card .usecase-tag {
  display: inline-block; font-size: 0.6875rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--purple); padding: 0 1.25rem; margin-top: 0.75rem;
}

/* Sovereign Cloud Feature Section */
.sovereign-feature {
  background: linear-gradient(135deg, #1a0b4a 0%, #0d0b1a 60%, #3b00b9 100%);
  border-radius: 0;
  padding: 56px 2rem;
  margin: 0;
  position: relative;
  overflow: hidden;
}
.sovereign-feature > * {
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
}
.sovereign-feature::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 100% 0%, rgba(139,92,246,0.35) 0%, transparent 60%);
  pointer-events: none;
}
.sovereign-feature-header { position: relative; text-align: center; margin-bottom: 2rem; }
.sovereign-feature-header .section-label { color: #a78bfa; }
.sovereign-feature-header h2 { color: #fff; font-size: clamp(1.5rem, 3.5vw, 2.25rem); margin-bottom: 0.75rem; }
.sovereign-feature-header h2::after { display: none; }
.sovereign-feature-header p { color: rgba(255,255,255,0.8); max-width: 680px; margin: 0 auto; font-size: 0.9375rem; line-height: 1.8; }
/* Japan Use Cases variant — oversized flag + label */
.sovereign-feature--jp .jp-eyebrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.sovereign-feature--jp .jp-flag {
  font-size: clamp(2.75rem, 6vw, 4rem);
  line-height: 1;
  filter: drop-shadow(0 4px 12px rgba(167,139,250,0.4));
}
.sovereign-feature--jp .jp-label {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, #fff 0%, #c4b5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sovereign-feature--jp .sovereign-feature-header h2 {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: rgba(255,255,255,0.85) !important;
  margin-top: 0.25rem;
  font-weight: 600;
}

/* About「私たちについて」variant — エディトリアル調（軽量+ブランド紫アクセント） */
.sovereign-feature--text {
  background: #F8F9FC !important;
  border-radius: 0;
  padding: 64px 2rem 56px !important;
  margin: 0 !important;
  position: relative;
  overflow: hidden;
  color: var(--body);
}
/* 左右のソフトな紫グロー（装飾） */
.sovereign-feature--text::before {
  content: '';
  position: absolute;
  top: -180px; right: -180px;
  left: auto; bottom: auto;
  width: 480px; height: 480px;
  background: radial-gradient(circle, rgba(123,45,237,0.10) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
  inset: auto -180px auto auto;
}
.sovereign-feature--text::after {
  content: '';
  position: absolute;
  bottom: -160px; left: -160px;
  width: 440px; height: 440px;
  background: radial-gradient(circle, rgba(234,108,253,0.08) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}
.sovereign-feature--text .sovereign-feature-header {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 0;
  text-align: center;
}
/* タイトル上の紫グラデのアクセントバー */
.sovereign-feature--text .sovereign-feature-header::before {
  content: '';
  display: block;
  width: 48px; height: 3px;
  background: linear-gradient(90deg, var(--primary-600), var(--primary-400));
  margin: 0 auto 28px;
  border-radius: 2px;
}
.sovereign-feature--text .section-label,
.sovereign-feature--text .sovereign-feature-header .section-label {
  color: var(--muted) !important;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  margin-bottom: 14px;
}
.sovereign-feature--text .sovereign-feature-header h2 {
  color: var(--heading) !important;
  font-size: clamp(1.875rem, 3.6vw, 2.5rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0 0 1.75rem;
  font-weight: 700;
}
.sovereign-feature--text .sovereign-feature-header p {
  margin-bottom: 1rem;
  max-width: 720px;
  color: var(--body) !important;
  font-size: 15.5px;
  line-height: 1.95;
  margin-left: auto;
  margin-right: auto;
}
.sovereign-feature--text .sovereign-feature-header p:last-of-type {
  margin-bottom: 1.5rem;
}
/* strong をマーカーハイライト風に */
.sovereign-feature--text .sovereign-feature-header strong {
  color: var(--heading);
  font-weight: 700;
  background: linear-gradient(180deg, transparent 62%, rgba(197,114,239,0.28) 62%, rgba(197,114,239,0.28) 92%, transparent 92%);
  padding: 0 3px;
}
.sovereign-feature--text .arrow-link-light {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 1.25rem;
  padding: 0.75rem 1.25rem;
  color: var(--purple);
  font-weight: 600;
  text-decoration: none;
  font-size: 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  transition: gap 0.2s, color 0.2s, border-color 0.2s, background 0.2s;
}
.sovereign-feature--text .arrow-link-light:hover {
  color: #fff;
  background: var(--purple);
  border-color: var(--purple);
  gap: 12px;
}
.sovereign-feature--text .arrow-link-light::after { content: none; }

@media (max-width: 768px) {
  .sovereign-feature--text { padding: 40px 1rem 36px !important; }
  .sovereign-feature--text::before,
  .sovereign-feature--text::after { width: 260px; height: 260px; }
  .sovereign-feature--text .sovereign-feature-header::before { margin: 0 auto 16px; }
  .sovereign-feature--text .sovereign-feature-header h2 { font-size: 1.375rem; margin: 0 0 1rem; }
  .sovereign-feature--text .sovereign-feature-header p { font-size: 14px; line-height: 1.85; }
}

/* Thesis variant — essay/narrative with hero image + body copy */
.sovereign-feature--thesis .thesis-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) 1.6fr;
  gap: 2rem;
  align-items: start;
}
.sovereign-feature--thesis .thesis-media {
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #0d0b1a;
  border: 1px solid rgba(255,255,255,0.12);
  aspect-ratio: 16 / 9;
  transition: border-color 0.2s, transform 0.2s;
  position: sticky;
  top: 6rem;
}
.sovereign-feature--thesis .thesis-media:hover {
  border-color: rgba(167,139,250,0.6);
  transform: translateY(-2px);
}
.sovereign-feature--thesis .thesis-media img {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.sovereign-feature--thesis .thesis-body p {
  color: rgba(255,255,255,0.88);
  font-size: 0.9375rem;
  line-height: 1.95;
  margin: 0 0 1.1rem;
  max-width: 64ch;
}
.sovereign-feature--thesis .thesis-body p strong {
  color: #fff;
}
.sovereign-feature--thesis .thesis-body p em {
  color: #c4b5fd;
  font-style: normal;
  background: rgba(167,139,250,0.12);
  padding: 0 0.35em;
  border-radius: 3px;
}
.sovereign-feature--thesis .thesis-quote {
  font-size: 1.0625rem !important;
  font-weight: 600;
  color: #fff !important;
  padding: 1rem 1.25rem;
  border-left: 3px solid #a78bfa;
  background: rgba(167,139,250,0.08);
  border-radius: 0 var(--radius-md, 8px) var(--radius-md, 8px) 0;
  line-height: 1.7 !important;
}
.sovereign-feature--thesis .thesis-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.sovereign-feature--thesis .thesis-cta .arrow-link-light {
  color: #a78bfa;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.9375rem;
}
.sovereign-feature--thesis .thesis-cta .arrow-link-light:hover {
  color: #fff;
}
@media (max-width: 800px) {
  .sovereign-feature--thesis .thesis-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .sovereign-feature--thesis .thesis-media {
    position: static;
  }
}

/* ========================================================
   Light variants — 背景リズム（白→グレー→白→ダーク→白）
   Sovereign CloudのみダークPurpleを残し、他は白/グレーで構成
   ======================================================== */
.sovereign-feature--light,
.sovereign-feature--light-gray {
  background: #fff !important;
  border-radius: 0;
  padding: 56px 2rem;
  margin: 0 !important;
  color: var(--body);
}
.sovereign-feature--light-gray { background: #F8F9FC !important; }
.sovereign-feature--light > *,
.sovereign-feature--light-gray > * {
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
}
@media (max-width: 768px) {
  .sovereign-feature--light,
  .sovereign-feature--light-gray { padding: 36px 1rem !important; }
  .sovereign-feature--light .sovereign-feature-header,
  .sovereign-feature--light-gray .sovereign-feature-header { margin-bottom: 1.5rem; }
  .sovereign-feature--light .sovereign-feature-header h2,
  .sovereign-feature--light-gray .sovereign-feature-header h2 { font-size: 1.375rem; }
  .sovereign-feature--light .sovereign-feature-header p,
  .sovereign-feature--light-gray .sovereign-feature-header p { font-size: 14px; line-height: 1.8; }
}

.sovereign-feature--light::before,
.sovereign-feature--light-gray::before { display: none; }

.sovereign-feature--light .sovereign-feature-header,
.sovereign-feature--light-gray .sovereign-feature-header {
  margin-bottom: 2.5rem;
}
.sovereign-feature--light .sovereign-feature-header .section-label,
.sovereign-feature--light-gray .sovereign-feature-header .section-label {
  color: var(--muted) !important;
}
.sovereign-feature--light .sovereign-feature-header h2,
.sovereign-feature--light-gray .sovereign-feature-header h2 {
  color: var(--heading) !important;
}
.sovereign-feature--light .sovereign-feature-header p,
.sovereign-feature--light-gray .sovereign-feature-header p {
  color: var(--muted) !important;
  font-size: 15px;
  line-height: 1.8;
}
.sovereign-feature--light .arrow-link-light,
.sovereign-feature--light-gray .arrow-link-light {
  color: var(--purple) !important;
  font-weight: 500;
  font-size: 14px;
}
.sovereign-feature--light .arrow-link-light:hover,
.sovereign-feature--light-gray .arrow-link-light:hover { color: var(--primary-500) !important; }

/* Light variant 内のカードは白ベース */
.sovereign-feature--light .sovereign-card,
.sovereign-feature--light-gray .sovereign-card {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--body);
  backdrop-filter: none;
}
.sovereign-feature--light-gray .sovereign-card { background: #fff; }
.sovereign-feature--light .sovereign-card:hover,
.sovereign-feature--light-gray .sovereign-card:hover {
  border-color: var(--purple);
  background: #fff;
  transform: translateY(-3px);
}
.sovereign-feature--light .sovereign-card h3,
.sovereign-feature--light-gray .sovereign-card h3 { color: var(--heading); }
.sovereign-feature--light .sovereign-card p,
.sovereign-feature--light-gray .sovereign-card p { color: var(--muted); }
.sovereign-feature--light .sovereign-card-country,
.sovereign-feature--light-gray .sovereign-card-country { color: var(--purple); }
.sovereign-feature--light .sovereign-card-meta,
.sovereign-feature--light-gray .sovereign-card-meta {
  color: var(--light);
  font-size: 12px;
}
.sovereign-feature--light .sovereign-card-meta span + span::before,
.sovereign-feature--light-gray .sovereign-card-meta span + span::before {
  content: '·';
  color: var(--light);
  opacity: 0.6;
  margin: 0 0.5rem;
}

/* --jp + --light 組み合わせの上書き — グラデ白文字を普通の表示に */
.sovereign-feature--light.sovereign-feature--jp .jp-label,
.sovereign-feature--light-gray.sovereign-feature--jp .jp-label {
  background: none;
  -webkit-text-fill-color: var(--heading);
  color: var(--heading);
}
.sovereign-feature--light.sovereign-feature--jp .sovereign-feature-header h2,
.sovereign-feature--light-gray.sovereign-feature--jp .sovereign-feature-header h2 {
  color: var(--heading) !important;
}
.sovereign-feature--light.sovereign-feature--jp .jp-flag,
.sovereign-feature--light-gray.sovereign-feature--jp .jp-flag {
  filter: drop-shadow(0 4px 12px rgba(59,0,185,0.2));
}

.sovereign-feature-grid--3 { grid-template-columns: repeat(3, 1fr) !important; }
.sovereign-feature-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.sovereign-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: #fff;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(10px);
  transition: border-color 0.2s, transform 0.2s, background 0.2s;
}
.sovereign-card:hover {
  border-color: rgba(167,139,250,0.6);
  background: rgba(255,255,255,0.08);
  transform: translateY(-3px);
}
.sovereign-card-media {
  aspect-ratio: 16 / 9;
  background: #0d0b1a;
  overflow: hidden;
  position: relative;
}
.sovereign-card-media img {
  width: 100%; height: 100%; object-fit: cover;
}
.sovereign-card-body {
  padding: 1.5rem 1.5rem 1.75rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.sovereign-card-flag {
  font-size: 1.5rem; margin-bottom: 0.5rem;
}
.sovereign-card-country {
  font-size: 0.6875rem; font-weight: 700;
  color: #a78bfa;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.625rem;
}
.sovereign-card h3 {
  color: #fff;
  font-size: 1.1875rem;
  line-height: 1.45;
  margin: 0 0 0.875rem;
}
.sovereign-card p {
  color: rgba(255,255,255,0.72);
  font-size: 0.875rem;
  line-height: 1.75;
  margin: 0 0 1.25rem;
  flex: 1;
}
.sovereign-card-meta {
  color: rgba(255,255,255,0.5);
  font-size: 0.75rem;
  margin-top: auto;
}
.sovereign-card-meta span + span::before {
  content: ' · ';
  margin: 0 0.25rem;
  color: rgba(255,255,255,0.3);
}
@media (max-width: 768px) {
  .sovereign-feature { padding: 36px 1rem; }
  .sovereign-feature-grid { grid-template-columns: 1fr; }
  .sovereign-feature-grid--3 { grid-template-columns: 1fr !important; }
  .sovereign-feature-header { margin-bottom: 1.5rem; }
  .sovereign-feature-header h2 { font-size: 1.375rem !important; line-height: 1.3; }
  .sovereign-feature-header p { font-size: 14px !important; line-height: 1.8; }
  .sovereign-feature--jp .jp-flag { font-size: 2.25rem !important; }
  .sovereign-feature--jp .jp-label { font-size: 1.25rem !important; }
  .sovereign-card-body { padding: 1.25rem 1.25rem 1.5rem; }
  .sovereign-card h3 { font-size: 1.0625rem; }
  .sovereign-card p { font-size: 13.5px; }
}
@media (min-width: 769px) and (max-width: 1100px) {
  .sovereign-feature-grid--3 { grid-template-columns: repeat(2, 1fr) !important; }
}

/* ============================================================
   全ページ統一：section-intro を紫ダーク丸角バナーに変える
   section-intro + 後続の usecase-grid / year-heading / details
   が視覚的に繋がった紫ボックスに見えるようにする。
   ============================================================ */
.site-main > .container > .section-intro {
  background: linear-gradient(135deg, #1a0b4a 0%, #0d0b1a 60%, #3b00b9 100%);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem 2.25rem;
  color: #fff;
  position: relative;
  overflow: hidden;
  margin: 2.5rem 0 1.5rem !important;
}
.site-main > .container > .section-intro::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 100% 0%, rgba(139,92,246,0.35) 0%, transparent 60%);
  pointer-events: none;
}
.site-main > .container > .section-intro > * { position: relative; }
.site-main > .container > .section-intro .section-label {
  color: #a78bfa !important;
}
.site-main > .container > .section-intro h2 {
  color: #fff !important;
  font-size: clamp(1.5rem, 3.5vw, 2.125rem);
}
.site-main > .container > .section-intro h2::after { display: none !important; }
.site-main > .container > .section-intro p {
  color: rgba(255,255,255,0.85) !important;
  max-width: 860px;
  font-size: 0.9375rem;
  line-height: 1.85;
}
.site-main > .container > .section-intro a {
  color: #c4b5fd;
  text-decoration: underline;
}
.site-main > .container > .section-intro a:hover { color: #fff; }

/* About ページの article-section も同じ紫ダークバナー化 */
.site-main > .container.reading-width > .article-section > .section-label {
  display: inline-block;
}
.site-main > .container.reading-width > .article-section {
  background: linear-gradient(135deg, #1a0b4a 0%, #0d0b1a 60%, #3b00b9 100%);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  color: #fff;
  margin: 2.5rem 0 !important;
  position: relative;
  overflow: hidden;
}
.site-main > .container.reading-width > .article-section::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 100% 0%, rgba(139,92,246,0.3) 0%, transparent 60%);
  pointer-events: none;
}
.site-main > .container.reading-width > .article-section > * { position: relative; }
.site-main > .container.reading-width > .article-section .section-label {
  color: #a78bfa !important;
}
.site-main > .container.reading-width > .article-section h2 {
  color: #fff !important;
}
.site-main > .container.reading-width > .article-section h2::after { display: none !important; }
.site-main > .container.reading-width > .article-section h3 {
  color: #fff !important;
  margin-top: 1.5rem;
}
.site-main > .container.reading-width > .article-section p {
  color: rgba(255,255,255,0.85) !important;
}
.site-main > .container.reading-width > .article-section li {
  color: rgba(255,255,255,0.85);
}
.site-main > .container.reading-width > .article-section a {
  color: #c4b5fd;
}
.site-main > .container.reading-width > .article-section a:hover {
  color: #fff;
}
.site-main > .container.reading-width > .article-section .callout {
  background: rgba(255,255,255,0.08);
  border-left: 3px solid #a78bfa;
  color: rgba(255,255,255,0.9);
}
.site-main > .container.reading-width > .article-section .callout p {
  color: rgba(255,255,255,0.9) !important;
}
.site-main > .container.reading-width > .article-section .card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
}
.site-main > .container.reading-width > .article-section .card h3 {
  color: #fff;
  margin-top: 0;
}
.site-main > .container.reading-width > .article-section .card p {
  color: rgba(255,255,255,0.8) !important;
}
.site-main > .container.reading-width > .article-section figure img {
  border-radius: var(--radius-md);
}

@media (max-width: 768px) {
  .site-main > .container > .section-intro { padding: 1.75rem 1.25rem; }
  .site-main > .container.reading-width > .article-section { padding: 1.75rem 1.25rem; }
}

/* Japan Developer Projects Feature Section */
.japan-feature {
  margin: 2.5rem 0 3rem;
  padding: 2.25rem 1.75rem 2rem;
  background: linear-gradient(135deg, #fff7f7 0%, #fff 35%, #f5f2ff 100%);
  border: 1px solid var(--border-light);
  border-left: 4px solid #bc002d;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.japan-feature::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 220px; height: 220px;
  background: radial-gradient(circle, rgba(188,0,45,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.japan-feature-header { position: relative; margin-bottom: 1.75rem; }
.japan-feature-header .section-label {
  color: #bc002d;
  font-weight: 700;
}
.japan-feature-header h2 {
  font-size: clamp(1.375rem, 3vw, 1.875rem);
  margin-bottom: 0.5rem;
}
.japan-feature-header h2::after { display: none; }
.japan-feature-header p {
  color: var(--muted);
  max-width: 720px;
  font-size: 0.9375rem;
  line-height: 1.8;
  margin: 0;
}
.japan-grid { position: relative; margin-top: 0; }
@media (max-width: 768px) {
  .japan-feature { padding: 1.75rem 1rem 1.5rem; }
}

/* Notice banner (for merge/redirect pages) */
.notice-banner {
  margin: 1rem 0 2rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #fffbea 0%, #fff 40%, #f5f2ff 100%);
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--purple);
}
.notice-banner-inner {
  padding: 1.75rem 1.5rem;
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}
.notice-banner-icon {
  font-size: 1.75rem;
  flex-shrink: 0;
  line-height: 1;
}
.notice-banner-body { flex: 1; }
.notice-banner-body h2 {
  font-size: 1.125rem;
  margin: 0 0 0.5rem;
  color: var(--heading);
}
.notice-banner-body h2::after { display: none; }
.notice-banner-body p {
  color: var(--body);
  font-size: 0.9375rem;
  line-height: 1.8;
  margin: 0;
}
.notice-banner-body p + p { margin-top: 0.75rem; }

/* Year heading (used in Luma Events Calendar) */
.year-heading {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--heading);
  margin: 2rem 0 1rem;
  padding-left: 0.75rem;
  border-left: 3px solid var(--purple);
}

/* Archive details (folding area for C3F Era) */
.archive-details {
  margin: 1rem 0 0;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: var(--bg-page);
}
.archive-details > summary {
  padding: 0.875rem 1.25rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--purple);
  font-size: 0.9375rem;
  list-style: none;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.archive-details > summary::-webkit-details-marker { display: none; }
.archive-details > summary::before {
  content: '▶';
  font-size: 0.75rem;
  transition: transform 0.2s;
  display: inline-block;
}
.archive-details[open] > summary::before { transform: rotate(90deg); }
.archive-details[open] > summary { border-bottom: 1px solid var(--border-light); }
.archive-details > ul { padding: 0.5rem 1.25rem 1rem; }

/* Recent updates subsection (Caffeine, icpay, Mission 70 etc.) */
.usecase-subsection { margin-top: 3rem; }
.usecase-subsection-title {
  font-size: 0.75rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--purple);
  margin-bottom: 0.5rem;
}
.usecase-subsection h3 {
  font-size: 1.375rem;
  color: var(--heading);
  margin-bottom: 0.5rem;
}
.usecase-subsection > p {
  color: var(--muted);
  font-size: 0.9375rem;
  margin-bottom: 1.5rem;
  max-width: 700px;
}

/* =========================================================
   Partners Page
   ========================================================= */
.partners-page {
  padding: 56px 0 72px;
  background: #fff;
}
.partners-intro {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3rem;
}
.partners-intro .section-label { color: var(--muted); }
.partners-intro h2 {
  color: var(--heading);
  font-size: clamp(1.75rem, 3.2vw, 2.25rem);
  margin: 0 0 1rem;
}
.partners-intro h2::after { display: none; }
.partners-intro .section-lede { margin-left: auto; margin-right: auto; text-align: center; }

.partners-category {
  margin-bottom: 3.5rem;
}
.partners-category:last-child { margin-bottom: 0; }
.partners-category-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--heading);
  margin: 0 0 0.5rem;
  padding-bottom: 0.625rem;
  border-bottom: 1px solid var(--border);
  padding-left: 0;
}
.partners-category-desc {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
  margin: 0 0 1.5rem;
  max-width: 720px;
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
}
.partner-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  min-height: 120px;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  text-align: center;
}
.partner-card:hover {
  border-color: var(--purple);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59,0,185,0.06);
}
.partner-card img {
  max-width: 130px;
  max-height: 56px;
  object-fit: contain;
  filter: none;
  opacity: 0.95;
}
.partner-name {
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
  line-height: 1.35;
}

/* Global ICP Hubs — chips + network header */
.hubs-network-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: linear-gradient(135deg, #1a0b4a 0%, #0d0b1a 60%, #3b00b9 100%);
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}
.hubs-network-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.08em;
}
.hubs-network-links {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.hubs-network-links a {
  font-size: 12px;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  padding: 0.375rem 0.875rem;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-pill);
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  text-decoration: none;
}
.hubs-network-links a:hover {
  background: rgba(255,255,255,0.2);
  border-color: rgba(255,255,255,0.3);
  color: #fff;
}

.hubs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.hub-chip {
  font-size: 13px;
  font-weight: 500;
  color: var(--body);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 0.5rem 0.875rem;
  transition: border-color 0.2s, background 0.2s;
  line-height: 1.2;
}
.hub-chip:hover { border-color: var(--purple); }
.hub-chip--current {
  background: var(--purple);
  color: #fff;
  border-color: var(--purple);
  font-weight: 600;
}

.hubs-linktree-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 14px;
  font-weight: 600;
  color: var(--purple);
  padding: 0.625rem 1.125rem;
  border: 1px solid var(--purple);
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
  font-family: var(--font-mono);
}
.hubs-linktree-cta::before { content: '🔗'; font-size: 14px; }
.hubs-linktree-cta::after { content: '↗'; font-size: 14px; opacity: 0.7; }
.hubs-linktree-cta:hover {
  background: var(--purple);
  color: #fff;
}

@media (max-width: 768px) {
  .partners-page { padding: 40px 0 48px; }
  .partners-intro { margin-bottom: 2rem; }
  .partners-category { margin-bottom: 2.5rem; }
  .partners-category-title { font-size: 1rem; }
  .partners-category-desc { font-size: 13px; }
  .partners-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 0.75rem; }
  .partner-card { min-height: 100px; padding: 1rem 0.75rem; }
  .partner-card img { max-width: 100px; max-height: 44px; }
  .partner-name { font-size: 11px; }
  .hubs-network-header { padding: 1rem 1.25rem; gap: 0.75rem; }
  .hubs-network-title { font-size: 0.875rem; }
  .hubs-network-links a { font-size: 11px; padding: 0.25rem 0.625rem; }
  .hub-chip { font-size: 12px; padding: 0.375rem 0.75rem; }
  .hubs-linktree-cta { font-size: 12px; padding: 0.5rem 1rem; }
}

/* =========================================================
   Bottom CTA
   ========================================================= */
.cta-bottom {
  background: var(--dark-bg);
  padding: 64px 0;
  position: relative;
}
.cta-bottom::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 50% 40% at 50% 100%, rgba(59,0,185,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.cta-bottom h2 { color: #fff; text-align: center; margin-bottom: 0.5rem; }
.cta-bottom > .container > p { color: var(--dark-text-secondary); text-align: center; max-width: 480px; margin: 0 auto 2.5rem; font-size: 0.9375rem; }

.cta-channels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.cta-channel {
  background: var(--dark-elevated);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}
.cta-channel:hover {
  background: var(--dark-elevated-hover);
  border-color: var(--dark-border-hover);
  transform: translateY(-2px);
}
.cta-channel h3 { color: var(--dark-text); font-size: 1.0625rem; margin-bottom: 0.375rem; }
.cta-channel p { color: var(--dark-text-secondary); font-size: 0.8125rem; margin-bottom: 0; line-height: 1.65; }
.cta-channel .channel-cta {
  display: inline-flex; align-items: center; gap: 0.25rem;
  font-size: 0.8125rem; font-weight: 600; color: var(--primary-200);
  margin-top: 0.75rem;
  transition: gap 0.2s;
}
.cta-channel:hover .channel-cta { gap: 0.5rem; }
.cta-channel .channel-cta::after { content: '\2192'; }

/* Legacy CTA */
.cta-dark {
  background: var(--dark-bg);
  padding: 80px 0;
  position: relative;
}
.cta-dark::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 50% 40% at 50% 100%, rgba(59,0,185,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.cta-dark h2 { color: #fff; }
.cta-dark p { color: var(--dark-text-secondary); }
.link-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.75rem 1rem;
  background: var(--dark-elevated); border: 1px solid var(--dark-border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem; color: var(--dark-text-secondary);
  font-weight: 500; font-size: 0.8125rem;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.link-row:hover { background: var(--dark-elevated-hover); border-color: var(--dark-border-hover); color: var(--dark-text); }
.link-row::after { content: '\2192'; color: var(--dark-text-tertiary); }
.link-row:hover::after { color: var(--dark-text); }

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  background: var(--dark-bg); border-top: 1px solid var(--dark-border);
  padding: 2.5rem 0 2rem;
}
.footer-nav { display: flex; justify-content: center; gap: 1.5rem; margin-bottom: 1rem; }
.footer-nav a { color: var(--dark-text-tertiary); font-size: 0.8125rem; }
.footer-nav a:hover { color: var(--dark-text-secondary); }
.site-footer p { text-align: center; color: var(--dark-text-tertiary); font-size: 0.75rem; }
.site-footer a { color: var(--primary-200); }

/* =========================================================
   Utility
   ========================================================= */
hr { border: none; height: 1px; background: var(--border); margin: 2.5rem 0; }

/* =========================================================
   Blog article
   ========================================================= */
.site-main img { border-radius: var(--radius-md); margin: 1.25rem 0; }
.imported-body { line-height: 1.875; max-width: var(--reading-w); }
.imported-body h2 {
  color: var(--heading); margin-top: 80px;
  font-size: clamp(1.375rem, 2.5vw, 1.625rem);
  position: relative; padding-bottom: 0.75rem;
}
.imported-body h2::after {
  content: ''; position: absolute; left: 0; bottom: 0;
  width: 40px; height: 2px; background: var(--primary-600); border-radius: 1px;
}
.imported-body h3 { color: var(--heading); margin-top: 40px; font-size: 1.0625rem; padding-left: 0.875rem; border-left: 2px solid var(--purple); }
.imported-body h4 { color: var(--heading); margin-top: 28px; }
.imported-body p { color: var(--body); }
.imported-body a { color: var(--purple); font-weight: 500; }
.imported-body a:hover { color: var(--primary-500); text-decoration: underline; }
.imported-body strong { color: var(--heading); font-weight: 500; }
.imported-body ul, .imported-body ol { color: var(--body); }
.imported-body li { margin-bottom: 0.625rem; font-size: 0.9375rem; }
.imported-body figure { margin: 2rem 0; }
.imported-body figure img { border-radius: var(--radius-lg); width: 100%; }
.imported-body blockquote {
  border-left: 2px solid var(--purple); padding: 1.25rem 1.5rem; margin: 1.5rem 0;
  background: var(--bg-callout); border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--body);
}
.imported-body table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.875rem; }
.imported-body th, .imported-body td { padding: 0.625rem 0.875rem; border: 1px solid var(--border-light); text-align: left; }
.imported-body th { background: var(--bg-page); color: var(--heading); font-weight: 600; }

.site-main h1 { font-size: clamp(1.375rem, 3.5vw, 2rem); margin-top: 0.5rem; margin-bottom: 1.5rem; max-width: var(--reading-w); }
.site-main h1::after { display: none; }
.site-main > .container > p:first-child > a[href="/blog/"] { font-size: 0.8125rem; font-weight: 500; color: var(--purple); }

/* =========================================================
   Mobile Menu
   ========================================================= */
.menu-toggle { display: none; }
.menu-btn { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; z-index: 101; }
.menu-btn span { display: block; width: 20px; height: 2px; background: rgba(255,255,255,0.8); border-radius: 1px; transition: transform 0.3s, opacity 0.3s, background 0.3s; }
.site-header.is-scrolled-light .menu-btn span { background: var(--body); }
.menu-toggle:checked ~ .menu-btn span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle:checked ~ .menu-btn span:nth-child(2) { opacity: 0; }
.menu-toggle:checked ~ .menu-btn span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1023px) {
  :root { --px: 24px; }
  .hero--home .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .path-grid { grid-template-columns: 1fr 1fr; }
  .visual-grid { grid-template-columns: 1fr 1fr; }
  .visual-grid .visual-card:last-child { grid-column: span 2; aspect-ratio: 21 / 9; }
  .cta-channels { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --px: 16px; }
  .menu-btn { display: flex; }
  .site-nav {
    display: none; position: absolute; top: var(--header-h); left: 0; right: 0;
    background: rgba(13,11,26,0.98); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--dark-border); flex-direction: column;
    padding: 0.375rem var(--px);
  }
  .site-nav a { padding: 0.75rem 0; border-bottom: 1px solid var(--dark-border); font-size: 0.875rem; }
  .site-nav a:last-child { border-bottom: none; }
  .menu-toggle:checked ~ .site-nav { display: flex; }

  .hero--home { min-height: auto; padding: calc(var(--header-h) + 32px) 0 24px; }
  .hero--home h1 { font-size: clamp(1.75rem, 6vw, 2.25rem); }
  /* Mobile: 主コピー→CTA→最新1件のみ表示 */
  .hero-panel .data-card:nth-child(n+2) { display: none; }

  .hero--page { padding: calc(var(--header-h) + 24px) 0 28px; }

  .path-grid { grid-template-columns: 1fr; }
  .grid { gap: 0.875rem; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }

  .post-item-with-thumb { gap: 1rem; }
  .post-thumb { width: 100px; height: 64px; }
  .usecase-grid { grid-template-columns: 1fr 1fr; gap: 0.875rem; }

  .footer-nav { flex-direction: column; gap: 0.375rem; align-items: center; }
  .hero-ctas { flex-direction: column; align-items: stretch; gap: 0.5rem; }
  .hero-ctas .btn { width: 100%; justify-content: center; }

  .hero--home .hero-grid { gap: 1.25rem; }
  .display-en { letter-spacing: -0.01em; }

  .imported-body pre,
  .imported-body code,
  .imported-body blockquote {
    max-width: 100%; overflow-x: auto; word-break: break-word;
  }
  .imported-body pre { white-space: pre-wrap; }
  .imported-body img,
  .imported-body iframe,
  .imported-body table { max-width: 100%; }
  .imported-body table { display: block; overflow-x: auto; }

  .section-dark { padding: 48px 0; }
  .visual-grid { grid-template-columns: 1fr; gap: 0.875rem; }
  .visual-card { aspect-ratio: 16 / 9; }
  .splash-image { padding-bottom: 24px; }
  .cta-bottom { padding: 48px 0; }
  .cta-channels { grid-template-columns: 1fr; }
  .cta-dark { padding: 48px 0; }

  .article-section { padding-top: 48px; margin-top: 48px; }
  .stats-row { gap: 1.5rem; }

  .stats-section { padding: 16px 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-card { padding: 0.875rem 1rem; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .stat-card:nth-child(2n) { border-right: none; }
  .stat-card:nth-last-child(-n+2) { border-bottom: none; }
  .stat-number { font-size: 1.625rem; }

  .partners-section { padding: 56px 0; }
  .partner-logo { width: 120px; height: 88px; padding: 0.25rem 0.375rem; }
  .partners-marquee-track { gap: 0.625rem; animation-duration: 40s; }
}

@media (max-width: 480px) {
  .usecase-grid { grid-template-columns: 1fr; }
  .post-thumb { width: 80px; height: 52px; }
}