/* ===================== SEO Pages Common CSS ===================== */
/* Industry/Service/Case/Guide/Knowledge ページ共通スタイル */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --cream: #faf6ef;
  --ivory: #f3ece0;
  --sand: #ebddc0;
  --gold: #c9a86a;
  --gold-dark: #a88649;
  --camel: #8a6536;
  --leather: #6b4423;
  --leather-dark: #3e2712;
  --ink: #1f1611;
  --text: #2c251d;
  --muted: #6e5a47;
}
html { scroll-behavior: smooth; }
body {
  font-family: "Noto Sans JP", "Hiragino Sans", sans-serif;
  background: var(--cream); color: var(--text);
  line-height: 1.85; font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: 0.3s; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 32px; }
.container-narrow { max-width: 860px; margin: 0 auto; padding: 0 32px; }

/* ---------- Header ---------- */
header {
  background: rgba(250,246,239,0.95); backdrop-filter: blur(10px);
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  border-bottom: 1px solid rgba(107,68,35,0.08);
}
.nav { display: flex; justify-content: space-between; align-items: center; padding: 18px 32px; max-width: 1400px; margin: 0 auto; gap: 24px; }
.logo { font-family: "Cormorant Garamond", serif; font-weight: 600; color: var(--leather-dark); font-size: 19px; letter-spacing: 0.18em; }
.logo span { display: block; font-family: "Noto Sans JP", sans-serif; font-size: 9px; color: var(--camel); letter-spacing: 0.3em; margin-top: 2px; }
.nav ul { display: flex; gap: 28px; list-style: none; font-size: 13.5px; letter-spacing: 0.05em; }
.nav ul a:hover { color: var(--camel); }
.nav-cta { padding: 9px 20px; background: var(--leather-dark); color: var(--cream); font-size: 12px; letter-spacing: 0.2em; }
.nav-cta:hover { background: var(--leather); }

/* ---------- Page Hero ---------- */
.page-head {
  padding: 160px 0 70px; text-align: center;
  background: linear-gradient(180deg, var(--ivory) 0%, var(--cream) 100%);
  border-bottom: 1px solid rgba(107,68,35,0.08);
}
.page-head .kicker { font-family: "Cormorant Garamond", serif; letter-spacing: 0.4em; color: var(--camel); font-size: 13px; margin-bottom: 16px; text-transform: uppercase; }
.page-head h1 { font-family: "Noto Serif JP", serif; font-size: clamp(28px, 4.5vw, 46px); color: var(--leather-dark); margin-bottom: 22px; font-weight: 700; line-height: 1.4; }
.page-head .lead { color: var(--muted); max-width: 680px; margin: 0 auto; line-height: 1.95; font-size: 15px; }
.breadcrumb { margin-top: 28px; font-size: 11.5px; letter-spacing: 0.15em; color: var(--camel); font-family: "Cormorant Garamond", serif; }
.breadcrumb a { color: var(--camel); }
.breadcrumb a:hover { color: var(--leather-dark); }

/* ---------- Section ---------- */
.section { padding: 80px 0; }
.section-tight { padding: 60px 0; }
.section-alt { background: var(--ivory); }
.sec-tag { font-family: "Cormorant Garamond", serif; letter-spacing: 0.4em; color: var(--camel); font-size: 12px; text-transform: uppercase; margin-bottom: 14px; text-align: center; }
.sec-title { font-family: "Noto Serif JP", serif; font-size: clamp(22px, 3vw, 32px); color: var(--leather-dark); margin-bottom: 18px; font-weight: 700; text-align: center; line-height: 1.5; }
.sec-lead { color: var(--muted); text-align: center; max-width: 720px; margin: 0 auto 40px; font-size: 14.5px; line-height: 1.95; }

/* ---------- Article body ---------- */
.article-body { max-width: 760px; margin: 0 auto; }
.article-body h2 { font-family: "Noto Serif JP", serif; font-size: 24px; color: var(--leather-dark); margin: 56px 0 20px; padding-bottom: 12px; border-bottom: 2px solid var(--gold); font-weight: 700; }
.article-body h3 { font-family: "Noto Serif JP", serif; font-size: 18px; color: var(--leather-dark); margin: 36px 0 14px; font-weight: 700; }
.article-body p { font-size: 15px; color: var(--text); line-height: 2.05; margin-bottom: 18px; }
.article-body ul, .article-body ol { margin: 16px 0 24px 28px; }
.article-body li { font-size: 14.5px; line-height: 1.95; color: var(--text); margin-bottom: 8px; }
.article-body strong { color: var(--leather-dark); font-weight: 700; }
.article-body a { color: var(--gold-dark); border-bottom: 1px solid var(--gold-dark); padding-bottom: 1px; }
.article-body a:hover { color: var(--leather-dark); border-color: var(--leather-dark); }
.callout {
  background: var(--ivory); border-left: 3px solid var(--gold);
  padding: 20px 26px; margin: 26px 0; border-radius: 2px;
}
.callout p { font-size: 14px; color: var(--text); margin-bottom: 0; }

/* ---------- Tables ---------- */
.article-body table { width: 100%; margin: 28px 0; border-collapse: collapse; font-size: 14px; }
.article-body th, .article-body td { padding: 14px 16px; text-align: left; border: 1px solid var(--sand); }
.article-body th { background: var(--ivory); font-family: "Noto Serif JP", serif; color: var(--leather-dark); font-weight: 700; }
.article-body td { background: #fff; color: var(--text); }

/* ---------- Card grids ---------- */
.cards-grid { display: grid; gap: 24px; margin-top: 30px; }
.cards-grid.col-2 { grid-template-columns: repeat(2, 1fr); }
.cards-grid.col-3 { grid-template-columns: repeat(3, 1fr); }
.cards-grid.col-4 { grid-template-columns: repeat(4, 1fr); }
.feature-card {
  background: #fff; padding: 28px 26px; border-top: 3px solid var(--gold);
  transition: 0.3s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 14px 36px rgba(62,39,18,0.1); }
.feature-card .num { font-family: "Cormorant Garamond", serif; font-size: 26px; color: var(--camel); margin-bottom: 12px; }
.feature-card .ic { font-size: 32px; margin-bottom: 14px; }
.feature-card h3 { font-family: "Noto Serif JP", serif; font-size: 17px; color: var(--leather-dark); margin-bottom: 10px; line-height: 1.5; font-weight: 700; }
.feature-card p { font-size: 13.5px; color: var(--muted); line-height: 1.85; }

/* ---------- CTA ---------- */
.cta-section {
  background: var(--leather-dark); color: var(--cream);
  padding: 70px 32px; text-align: center;
}
.cta-section h3 { font-family: "Noto Serif JP", serif; font-size: clamp(20px, 3vw, 28px); margin-bottom: 16px; color: #fff; font-weight: 700; }
.cta-section p { color: rgba(250,246,239,0.85); font-size: 14px; margin-bottom: 28px; }
.cta-section .btn-primary {
  display: inline-block; background: var(--gold); color: var(--leather-dark);
  padding: 16px 40px; font-size: 13px; letter-spacing: 0.2em; font-weight: 600;
  transition: 0.3s;
}
.cta-section .btn-primary:hover { background: #e0bf7f; transform: translateY(-2px); }

/* ---------- Related links ---------- */
.related-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
  margin-top: 30px;
}
.related-card {
  background: #fff; padding: 22px 24px; border-left: 2px solid var(--gold);
  transition: 0.3s;
}
.related-card:hover { background: var(--ivory); transform: translateX(4px); }
.related-card .lbl { font-family: "Cormorant Garamond", serif; letter-spacing: 0.25em; color: var(--camel); font-size: 10.5px; text-transform: uppercase; margin-bottom: 8px; }
.related-card .ttl { font-family: "Noto Serif JP", serif; font-size: 15px; color: var(--leather-dark); line-height: 1.5; font-weight: 700; }

/* ---------- Footer ---------- */
footer { background: var(--leather-dark); color: rgba(250,246,239,0.75); padding: 60px 0 30px; font-size: 13px; margin-top: 60px; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 36px; }
.footer-top h4 { color: var(--gold); font-family: "Cormorant Garamond", serif; letter-spacing: 0.2em; margin-bottom: 14px; font-size: 12px; }
.footer-top ul { list-style: none; line-height: 2.1; }
.footer-top a:hover { color: var(--gold); }
.footer-logo { font-family: "Noto Serif JP", serif; font-size: 18px; color: #fff; margin-bottom: 14px; letter-spacing: 0.08em; }
.copy { text-align: center; padding-top: 26px; border-top: 1px solid rgba(201,169,106,0.15); letter-spacing: 0.1em; font-size: 11px; }
.copy a { color: var(--gold); text-decoration: none; margin: 0 10px; }

/* ---------- Sticky CTA ---------- */
.sticky-cta {
  position: fixed; bottom: 24px; right: 24px; z-index: 90;
  background: var(--leather-dark); color: var(--cream);
  padding: 14px 22px; border-radius: 50px; font-size: 13px;
  letter-spacing: 0.15em; font-weight: 500;
  box-shadow: 0 8px 24px rgba(62,39,18,0.35);
  display: inline-flex; align-items: center; gap: 8px;
  transition: 0.3s; opacity: 0; pointer-events: none;
  transform: translateY(10px);
}
.sticky-cta.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.sticky-cta:hover { background: var(--gold); color: var(--leather-dark); transform: translateY(-2px); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav ul { display: none; }
  .cards-grid.col-2, .cards-grid.col-3, .cards-grid.col-4 { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 30px; }
  .page-head { padding: 120px 0 50px; }
  .section { padding: 56px 0; }
  .article-body h2 { font-size: 20px; margin: 40px 0 16px; }
  .article-body h3 { font-size: 16px; margin: 28px 0 12px; }
}