:root {
  --ink: #26364a;
  --muted: #667085;
  --paper: #fbf7ef;
  --card: #fffdf8;
  --line: #e7ded2;
  --accent: #2563eb;
  --accent-2: #0f766e;
  --accent-soft: #dbeafe;
  --green-soft: #ecfccb;
  --orange-soft: #ffedd5;
  --shadow: 0 18px 50px rgba(38, 54, 74, 0.08);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  background: radial-gradient(circle at top left, #fff7ed 0, transparent 32rem), var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Yu Gothic', 'YuGothic', 'Noto Sans JP', sans-serif;
  line-height: 1.8;
}
a { color: inherit; }
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px 20px;
}
.brand { display: flex; gap: 12px; align-items: center; text-decoration: none; }
.brand-mark {
  display: grid; place-items: center;
  width: 44px; height: 44px;
  border: 2px solid var(--ink);
  border-radius: 14px;
  background: var(--card);
  box-shadow: 4px 4px 0 #fcd34d;
  font-weight: 800;
}
.brand strong { display:block; font-size: 17px; line-height: 1.2; }
.brand small { display:block; color: var(--muted); font-size: 12px; }
.nav { display:flex; flex-wrap: wrap; gap: 8px; font-size: 14px; }
.nav a { padding: 8px 12px; border-radius: 999px; text-decoration:none; color: var(--muted); }
.nav a.active, .nav a:hover { background: var(--card); color: var(--ink); box-shadow: 0 0 0 1px var(--line) inset; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 20px 64px; }
.hero {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 36px; align-items: center;
  padding: 56px 0 40px;
}
.badge { display:inline-flex; align-items:center; gap:8px; border:1px solid var(--line); background:var(--card); border-radius:999px; padding:6px 12px; color:var(--muted); font-size:13px; }
h1 { font-size: clamp(34px, 6vw, 64px); line-height:1.12; letter-spacing: -0.04em; margin: 18px 0; }
h2 { font-size: clamp(25px, 3vw, 38px); line-height:1.25; letter-spacing:-0.02em; margin: 48px 0 18px; }
h3 { font-size: 21px; margin: 30px 0 10px; }
.lead { font-size: 18px; color: #475467; max-width: 42rem; }
.hero-card, .card, .article-shell, .note-box {
  background: rgba(255,253,248,.88);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}
.hero-card { padding: 28px; position: relative; }
.sketch-title { font-size: 26px; font-weight: 800; margin-bottom: 18px; }
.sketch-grid { display:grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.sketch-item { background: white; border: 2px solid #d6d3d1; border-radius: 18px; padding: 18px; min-height: 108px; }
.sketch-icon { font-size: 30px; display:block; margin-bottom: 8px; }
.cta-row { display:flex; flex-wrap:wrap; gap:12px; margin-top: 26px; }
.button { display:inline-flex; align-items:center; justify-content:center; padding: 12px 18px; border-radius: 14px; background: var(--ink); color:white; text-decoration:none; font-weight:700; }
.button.secondary { background: var(--card); color: var(--ink); border:1px solid var(--line); }
.grid { display:grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { padding: 22px; text-decoration:none; }
.card:hover { transform: translateY(-2px); transition: .2s ease; }
.card p { color: var(--muted); margin-bottom:0; }
.article-list { display:grid; gap: 14px; }
.article-link { display:block; padding:20px; border:1px solid var(--line); background:var(--card); border-radius:20px; text-decoration:none; }
.article-meta { color:var(--muted); font-size: 13px; }
.article-shell { max-width: 920px; margin: 20px auto 70px; padding: clamp(22px, 5vw, 54px); }
.article-shell h1 { font-size: clamp(31px, 5vw, 50px); }
.disclosure { background:#fff7ed; border:1px solid #fed7aa; color:#9a3412; padding:12px 16px; border-radius:16px; font-size:14px; }
table { width:100%; border-collapse: collapse; margin: 24px 0; overflow:hidden; border-radius: 16px; }
th, td { border:1px solid var(--line); padding: 12px; vertical-align: top; }
th { background:#f8fafc; text-align:left; }
.cta-card { border:1px solid var(--line); background:#f8fbff; border-radius:20px; padding:18px; margin:16px 0; }
.cta-card a { color: var(--accent); font-weight: 700; }
.site-footer { max-width:1120px; margin: 0 auto; padding: 30px 20px 60px; color:var(--muted); font-size: 13px; border-top:1px solid var(--line); }

/* Competitive-quality article system */
.article-page { max-width: 1120px; margin: 0 auto 76px; padding: 20px; }
.article-hero-pro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 24px;
  align-items: start;
  margin: 18px 0 22px;
}
.article-hero-copy,
.answer-panel,
.flow-steps,
.toc-card,
.article-body-pro,
.quality-bar {
  background: rgba(255, 253, 248, .92);
  border: 1px solid var(--line);
  border-radius: 30px;
  box-shadow: var(--shadow);
}
.article-hero-copy { padding: clamp(24px, 5vw, 52px); }
.article-hero-copy h1 { font-size: clamp(34px, 5vw, 56px); }
.sticky-summary {
  position: sticky;
  top: 18px;
  background: linear-gradient(160deg, #26364a, #0f766e);
  color: white;
  border-radius: 26px;
  padding: 22px;
  box-shadow: 0 20px 50px rgba(38,54,74,.18);
}
.summary-label,
.section-kicker {
  display: inline-flex;
  color: var(--accent-2);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.sticky-summary .summary-label { color: #bfdbfe; }
.sticky-summary ul { padding-left: 20px; margin: 12px 0 0; }
.sticky-summary li + li { margin-top: 8px; }
.answer-panel {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 20px;
  padding: 26px;
  margin: 18px 0;
  border-left: 8px solid var(--accent-2);
}
.answer-panel h2,
.flow-steps h2 { margin-top: 8px; }
.reader-card {
  background: #f0fdfa;
  border: 1px solid #99f6e4;
  border-radius: 22px;
  padding: 18px;
}
.flow-steps { padding: 26px; margin: 18px 0; }
.flow-steps ol {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  margin: 20px 0 0;
  counter-reset: flow;
}
.flow-steps li {
  list-style: none;
  counter-increment: flow;
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  min-height: 104px;
}
.flow-steps li::before {
  content: counter(flow);
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin-bottom: 10px;
  border-radius: 999px;
  background: var(--ink);
  color: white;
  font-weight: 800;
}
.toc-card { padding: 22px; margin: 18px 0; }
.toc-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 12px; }
.toc-grid a { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 12px; text-decoration: none; color: #334155; }
.article-body-pro { padding: clamp(22px, 5vw, 52px); margin-top: 18px; }
.article-body-pro h2 { scroll-margin-top: 24px; border-top: 1px solid var(--line); padding-top: 30px; }
.article-body-pro h2:first-child { border-top: 0; padding-top: 0; }
.article-body-pro table { display: block; overflow-x: auto; border-collapse: separate; border-spacing: 0; }
.article-body-pro th { background: #eef6ff; color: #1e3a8a; }
.article-body-pro tr:nth-child(even) td { background: #fffaf3; }
.cta-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  background: linear-gradient(135deg, #f8fbff, #f0fdfa);
}
.cta-card h3 { margin: 0 0 4px; }
.cta-card p { margin: 0; color: var(--muted); }
.click-reason {
  margin-top:12px;
  padding:14px;
  border-radius:16px;
  background:rgba(255,255,255,.78);
  border:1px dashed #bfdbfe;
}
.click-reason p { margin:6px 0 8px; color:#334155; }
.click-reason ul { margin:8px 0 0; padding-left:18px; color:var(--muted); }
.click-reason li + li { margin-top:4px; }
.cta-reason-label {
  display:inline-flex;
  border-radius:999px;
  background:#dbeafe;
  color:#1e40af;
  padding:3px 9px;
  font-size:12px;
  font-weight:800;
}
.cta-card a,
.cta-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 160px;
  padding: 11px 14px;
  border-radius: 12px;
  background: var(--accent);
  color: white;
  text-decoration: none;
}
.cta-card span { background: #e2e8f0; color: #475569; }
.quality-bar { padding: 20px 24px; margin-top: 18px; background: #f8fafc; }
.quality-bar ul { display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 10px 0 0; }
.quality-bar li { list-style: none; background: white; border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; color: var(--muted); font-size: 13px; }
.breadcrumbs { display:flex; flex-wrap:wrap; gap:8px; align-items:center; color:var(--muted); font-size:13px; margin: 8px 0 18px; }
.breadcrumbs a { color:#475569; text-decoration:none; }
.breadcrumbs a:hover { color:var(--accent); }
.related-section { background:rgba(255,253,248,.92); border:1px solid var(--line); border-radius:30px; box-shadow:var(--shadow); padding:26px; margin-top:18px; }
.related-section h2 { margin-top:8px; }
.related-grid { display:grid; grid-template-columns:repeat(2, minmax(0, 1fr)); gap:14px; }
.related-card { background:white; border:1px solid var(--line); border-radius:20px; padding:18px; text-decoration:none; }
.related-card span { color:var(--muted); font-size:12px; }
.related-card strong { display:block; line-height:1.45; margin:6px 0; }
.related-card p { color:var(--muted); margin:0; font-size:14px; }
.hub-section { background:rgba(255,253,248,.72); border:1px solid var(--line); border-radius:32px; box-shadow:var(--shadow); padding:28px; }
.hub-heading h2 { margin-top:8px; }
.hub-heading p { color:var(--muted); }
.hub-grid { display:grid; grid-template-columns:repeat(3, minmax(0, 1fr)); gap:14px; margin-top:20px; }
.hub-card { position:relative; min-height:180px; background:white; border:1px solid var(--line); border-radius:22px; padding:20px; text-decoration:none; }
.hub-card:hover, .related-card:hover, .article-link:hover { transform:translateY(-2px); transition:.2s ease; box-shadow:0 14px 34px rgba(38,54,74,.08); }
.hub-count { display:inline-flex; border-radius:999px; background:#eef6ff; color:#1e3a8a; padding:4px 10px; font-size:12px; font-weight:700; }
.category-flow-panel { background:linear-gradient(135deg,#fffdf8,#f0fdfa); border:1px solid var(--line); border-radius:28px; padding:24px; margin:26px 0; box-shadow:var(--shadow); }
.category-flow-panel h2 { margin-top:8px; }
.category-flow-panel ol { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:12px; padding:0; margin:18px 0 0; }
.category-flow-panel li { list-style:none; background:white; border:1px solid var(--line); border-radius:16px; padding:14px; }
.comparison-ranking,
.choice-diagnosis,
.decision-hub {
  background:rgba(255,253,248,.92);
  border:1px solid var(--line);
  border-radius:30px;
  box-shadow:var(--shadow);
  padding:26px;
  margin:18px 0;
}
.comparison-heading h2,
.choice-diagnosis h2,
.decision-hub h2 { margin-top:8px; }
.comparison-heading p,
.decision-hub p { color:var(--muted); }
.ranking-list { display:grid; gap:12px; margin-top:18px; }
.ranking-card {
  display:grid;
  grid-template-columns:76px minmax(0, 1fr) auto;
  gap:16px;
  align-items:center;
  background:white;
  border:1px solid var(--line);
  border-radius:20px;
  padding:18px;
}
.ranking-card h3 { margin:0 0 6px; }
.ranking-card p { margin:4px 0; color:var(--muted); }
.ranking-card strong { color:var(--ink); }
.ranking-badge {
  display:grid;
  place-items:center;
  width:60px;
  height:60px;
  border-radius:18px;
  background:#eef6ff;
  color:#1e3a8a;
  font-weight:900;
}
.ranking-score {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:72px;
  border-radius:999px;
  background:#fef3c7;
  color:#92400e;
  padding:6px 10px;
  font-weight:800;
  font-size:13px;
}
.diagnosis-grid,
.decision-grid { display:grid; grid-template-columns:repeat(3, minmax(0, 1fr)); gap:14px; margin-top:16px; }
.diagnosis-card,
.decision-card { background:white; border:1px solid var(--line); border-radius:20px; padding:18px; text-decoration:none; }
.diagnosis-card h3 { margin-top:0; }
.diagnosis-card p,
.decision-card p { color:var(--muted); margin-bottom:0; }
.decision-card span { color:var(--muted); font-size:12px; }
.decision-card strong { display:block; line-height:1.45; margin:8px 0; }
.decision-card:hover { transform:translateY(-2px); transition:.2s ease; box-shadow:0 14px 34px rgba(38,54,74,.08); }
@media (max-width: 900px) {
  .article-hero-pro,
  .answer-panel { grid-template-columns: 1fr; }
  .sticky-summary { position: static; }
  .flow-steps ol,
  .toc-grid,
  .related-grid,
  .hub-grid,
  .category-flow-panel ol,
  .diagnosis-grid,
  .decision-grid,
  .ranking-card { grid-template-columns: 1fr; }
  .cta-card { grid-template-columns: 1fr; }
  .cta-card a,
  .cta-card span { width: 100%; }
}
@media (max-width: 820px) {
  .site-header, .hero { display:block; }
  .nav { margin-top:18px; }
  .grid, .sketch-grid { grid-template-columns: 1fr; }
}