/* =============================================
   株式会社NOTE / Pillar Page Stylesheet
   /knowledge/ 配下のピラーページ共通スタイル
   ============================================= */

/* Hero */
.pillar-hero {
  padding: 160px 0 80px;
  background: linear-gradient(135deg, var(--color-black) 0%, #20223a 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.pillar-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top, rgba(64,158,213,0.15) 0%, transparent 60%);
  pointer-events: none;
}
.pillar-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}
.pillar-hero-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: var(--color-accent);
  text-transform: uppercase;
  display: block;
  margin-bottom: 20px;
}
.pillar-hero-title {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
  line-height: 1.45;
  margin: 0 0 28px;
}
.pillar-hero-lead {
  font-size: clamp(0.92rem, 1.6vw, 1.05rem);
  color: rgba(255,255,255,0.78);
  line-height: 1.95;
  letter-spacing: 0.01em;
  margin: 0;
}

/* Breadcrumb */
.pillar-breadcrumb {
  padding: 18px 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.pillar-breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.75rem;
  color: var(--color-gray-dark);
  flex-wrap: wrap;
}
.pillar-breadcrumb a { color: var(--color-gray-dark); text-decoration: none; }
.pillar-breadcrumb a:hover { color: var(--color-accent); }
.pillar-breadcrumb-sep { color: var(--color-border); }
.pillar-breadcrumb-current { color: var(--color-black); font-weight: 500; }

/* Layout */
.pillar-main {
  padding: 80px 0 120px;
  background: var(--color-bg);
}
.pillar-layout {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 60px;
  align-items: start;
}

/* Sidebar TOC */
.pillar-toc {
  position: sticky;
  top: 100px;
  padding: 24px 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
}

/* TOC toggle button (mobile accordion) */
.pillar-toc-toggle {
  display: none;
  width: 100%;
  padding: 0;
  margin: 0 0 12px;
  background: transparent;
  border: 0;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.pillar-toc-toggle-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.pillar-toc-toggle-icon {
  width: 14px;
  height: 14px;
  position: relative;
  flex-shrink: 0;
}
.pillar-toc-toggle-icon::before,
.pillar-toc-toggle-icon::after {
  content: '';
  position: absolute;
  background: var(--color-accent);
  transition: transform 0.25s;
}
.pillar-toc-toggle-icon::before {
  top: 50%; left: 0; right: 0; height: 2px; margin-top: -1px;
}
.pillar-toc-toggle-icon::after {
  top: 0; bottom: 0; left: 50%; width: 2px; margin-left: -1px;
}
.pillar-toc.is-open .pillar-toc-toggle-icon::after {
  transform: scaleY(0);
}

/* TOC link active state (scroll-spy) */
.pillar-toc-list a.is-active {
  color: var(--color-accent);
  font-weight: 700;
  padding-left: 6px;
}
.pillar-toc-list a.is-active .num {
  color: var(--color-black);
}
.pillar-toc-list li:has(a.is-active) {
  border-color: var(--color-accent);
}
.pillar-toc-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 14px;
}
.pillar-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.78rem;
  line-height: 1.55;
}
.pillar-toc-list li {
  padding: 7px 0;
  border-bottom: 1px dashed var(--color-border);
}
.pillar-toc-list li:last-child { border-bottom: none; }
.pillar-toc-list a {
  color: var(--color-gray-dark);
  text-decoration: none;
  display: block;
  transition: color 0.2s, padding-left 0.2s;
}
.pillar-toc-list a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}
.pillar-toc-list .num {
  display: inline-block;
  width: 24px;
  color: var(--color-accent);
  font-weight: 700;
  font-size: 0.72rem;
}

/* Article */
.pillar-article { min-width: 0; }

/* Quick Answer at top */
.pillar-quick-answer {
  margin: 0 0 56px;
  padding: 28px 32px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
}
.pillar-quick-answer .qa-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 10px;
}
.pillar-quick-answer .qa-text {
  font-size: 1rem;
  line-height: 1.95;
  color: var(--color-black);
  margin: 0;
}
.pillar-quick-answer .qa-text strong {
  font-weight: 700;
  background: linear-gradient(transparent 65%, rgba(64,158,213,0.2) 65%);
  padding: 0 2px;
}

/* Section */
.pillar-section { margin-bottom: 64px; }
.pillar-section:last-child { margin-bottom: 0; }
.pillar-section-num {
  display: inline-block;
  font-family: 'Times New Roman', serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  margin-bottom: 8px;
}
.pillar-h2 {
  font-size: clamp(1.3rem, 2.4vw, 1.65rem);
  font-weight: 700;
  color: var(--color-black);
  margin: 0 0 28px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--color-black);
  line-height: 1.5;
  letter-spacing: 0.01em;
  scroll-margin-top: 84px;
}
.pillar-h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-black);
  margin: 36px 0 16px;
  padding-left: 14px;
  border-left: 3px solid var(--color-accent);
  line-height: 1.5;
}
.pillar-h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-black);
  margin: 24px 0 10px;
  line-height: 1.5;
}
.pillar-section p {
  font-size: 0.92rem;
  line-height: 2;
  color: var(--color-gray-dark);
  margin: 0 0 16px;
  letter-spacing: 0.01em;
}
.pillar-section p strong {
  color: var(--color-black);
  font-weight: 700;
}
.pillar-section ul,
.pillar-section ol {
  margin: 0 0 22px;
  padding-left: 22px;
}
.pillar-section ul li,
.pillar-section ol li {
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--color-gray-dark);
  margin-bottom: 8px;
}
.pillar-section ul li::marker { color: var(--color-accent); }

/* Highlight box */
.pillar-box {
  margin: 28px 0;
  padding: 24px 28px;
  background: #fff;
  border: 1px solid var(--color-border);
}
.pillar-box-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 12px;
}
.pillar-box-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-black);
  margin: 0 0 12px;
}
.pillar-box p:last-child { margin-bottom: 0; }
.pillar-box.accent { background: #eef5fb; border-color: #d6e3ee; border-left: 3px solid var(--color-accent); }
.pillar-box.dark { background: var(--color-black); }
.pillar-box.dark .pillar-box-label { color: #5bb8f0; }
.pillar-box.dark .pillar-box-title,
.pillar-box.dark p { color: rgba(255,255,255,0.92); }
.pillar-box.dark p { color: rgba(255,255,255,0.78); }

/* Step list */
.pillar-steps {
  display: grid;
  gap: 20px;
  margin: 24px 0 28px;
}
.pillar-step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  align-items: start;
}
.pillar-step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
  font-family: 'Times New Roman', serif;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pillar-step-body { min-width: 0; }
.pillar-step h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-black);
  margin: 0 0 8px;
}
.pillar-step p {
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--color-gray-dark);
  margin: 0;
}

/* Data table */
.pillar-table {
  width: 100%;
  margin: 18px 0 24px;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.pillar-table th,
.pillar-table td {
  padding: 11px 14px;
  border: 1px solid var(--color-border);
  text-align: left;
}
.pillar-table th {
  background: var(--color-bg-light);
  font-weight: 700;
  color: var(--color-black);
  letter-spacing: 0.02em;
}
.pillar-table td {
  color: var(--color-gray-dark);
  line-height: 1.7;
}

/* FAQ */
.pillar-faq { margin: 0; }
.pillar-faq-item {
  margin-bottom: 14px;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--color-border);
}
.pillar-faq-q {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--color-black);
  margin: 0 0 12px;
  padding-left: 32px;
  position: relative;
  line-height: 1.55;
}
.pillar-faq-q::before {
  content: 'Q';
  position: absolute;
  left: 0;
  top: -2px;
  width: 24px;
  height: 24px;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 2px;
}
.pillar-faq-a {
  font-size: 0.88rem;
  line-height: 1.95;
  color: var(--color-gray-dark);
  margin: 0;
  padding-left: 32px;
  position: relative;
}
.pillar-faq-a::before {
  content: 'A';
  position: absolute;
  left: 0;
  top: -2px;
  width: 24px;
  height: 24px;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  color: var(--color-accent);
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 2px;
}

/* Cases */
.pillar-cases {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin: 20px 0 28px;
}
.pillar-case {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pillar-case-region {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent);
}
.pillar-case-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-black);
  margin: 0;
  line-height: 1.5;
}
.pillar-case-desc {
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--color-gray-dark);
  margin: 0;
}

/* Cluster article list */
.pillar-cluster {
  background: var(--color-bg-light);
  padding: 28px;
  border: 1px solid var(--color-border);
}
.pillar-cluster-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.pillar-cluster-list li {
  margin: 0;
}
.pillar-cluster-list a {
  display: block;
  padding: 14px 18px;
  background: #fff;
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: var(--color-black);
  font-size: 0.88rem;
  line-height: 1.55;
  transition: border-color 0.2s, padding-left 0.2s;
}
.pillar-cluster-list a:hover {
  border-color: var(--color-accent);
  padding-left: 22px;
}
.pillar-cluster-list a .cat {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-right: 10px;
}

/* Coming soon (未公開) state */
.pillar-cluster-list .coming {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  background: #f5f5f7;
  border: 1px dashed #d6d6dd;
  color: #909098;
  font-size: 0.88rem;
  line-height: 1.55;
  cursor: default;
  user-select: none;
}
.pillar-cluster-list .coming .cat {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #b0b0ba;
  margin-right: 4px;
  flex-shrink: 0;
}
.pillar-cluster-list .coming .title {
  flex: 1;
  min-width: 0;
  color: #888892;
}
.pillar-cluster-list .coming .coming-badge {
  flex-shrink: 0;
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #888;
  background: #fff;
  border: 1px solid #d6d6dd;
  padding: 3px 9px;
  border-radius: 2px;
  text-transform: uppercase;
  white-space: nowrap;
}
@media (max-width: 480px) {
  .pillar-cluster-list .coming {
    flex-wrap: wrap;
    gap: 6px 10px;
  }
}

/* CTA */
.pillar-cta {
  margin-top: 64px;
  padding: 56px 48px;
  background: var(--color-black);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.pillar-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(64,158,213,0.12) 0%, transparent 60%);
  pointer-events: none;
}
.pillar-cta-inner { position: relative; z-index: 1; }
.pillar-cta-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: block;
  margin-bottom: 16px;
}
.pillar-cta-title {
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  font-weight: 700;
  color: #fff;
  margin: 0 0 28px;
  line-height: 1.65;
}
.pillar-cta-btns {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.pillar-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s, gap 0.2s;
}
.pillar-cta-btn.primary {
  background: var(--color-accent);
  color: #fff;
}
.pillar-cta-btn.primary:hover {
  background: #5bb8f0;
  gap: 14px;
}
.pillar-cta-btn.outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.4);
}
.pillar-cta-btn.outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Responsive */
@media (max-width: 920px) {
  .pillar-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .pillar-toc {
    position: static;
    padding: 18px 20px;
  }
  .pillar-toc.is-collapsible .pillar-toc-toggle {
    display: flex;
    margin-bottom: 0;
  }
  .pillar-toc.is-collapsible .pillar-toc-label {
    display: none;
  }
  .pillar-toc.is-collapsible .pillar-toc-list {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    margin-top: 0;
    transition: max-height 0.3s ease, opacity 0.2s ease, margin-top 0.2s ease;
  }
  .pillar-toc.is-collapsible.is-open .pillar-toc-list {
    max-height: 800px;
    opacity: 1;
    margin-top: 14px;
  }
}
@media (max-width: 640px) {
  .pillar-hero { padding: 120px 0 60px; }
  .pillar-main { padding: 48px 0 80px; }
  .pillar-quick-answer { padding: 22px; }
  .pillar-h2 { font-size: 1.25rem; margin-bottom: 22px; }
  .pillar-h3 { font-size: 1rem; margin-top: 28px; }
  .pillar-step { grid-template-columns: 44px 1fr; gap: 14px; padding: 18px; }
  .pillar-step-num { width: 44px; height: 44px; font-size: 1.05rem; }
  .pillar-cta { padding: 40px 24px; }
  .pillar-cta-btn { padding: 12px 22px; font-size: 0.85rem; }
}