/* 技术文章页：与“陶瓷透水砖如何选型”保持同一视觉标准 */
.article {
  background: #fff;
  padding: 80px 0 120px;
}
.article-wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 40px;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  font-size: 13px;
  color: #6b7280;
  letter-spacing: .02em;
  flex-wrap: wrap;
}
.article-meta-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(201,74,27,.08);
  color: #c94a1b;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  border-radius: 100px;
}
.article h1 {
  font-size: clamp(2rem, 4.2vw, 3rem);
  font-weight: 900;
  color: #0f2340;
  line-height: 1.15;
  letter-spacing: -.02em;
  margin-bottom: 24px;
}
.article-lead {
  font-size: 1.15rem;
  color: #4a5162;
  line-height: 1.75;
  margin-bottom: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid #e5dfd0;
}
.article-toc {
  background: #f5f2ed;
  border-radius: 4px;
  padding: 32px 36px;
  margin-bottom: 56px;
}
.article-toc-title {
  font-size: 12px;
  font-weight: 700;
  color: #c94a1b;
  letter-spacing: .16em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.article-toc ol {
  list-style: none;
  counter-reset: toc;
}
.article-toc li {
  counter-increment: toc;
  margin-bottom: 10px;
  font-size: 15px;
}
.article-toc a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  color: #0f2340;
  font-weight: 600;
  transition: color .2s;
}
.article-toc a::before {
  content: counter(toc, decimal-leading-zero);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: #c94a1b;
  font-weight: 700;
  letter-spacing: .06em;
  flex-shrink: 0;
}
.article-toc a:hover { color: #c94a1b; }
.article-body h2 {
  font-size: 1.6rem;
  font-weight: 900;
  color: #0f2340;
  line-height: 1.3;
  letter-spacing: -.01em;
  margin: 64px 0 20px;
  scroll-margin-top: 100px;
}
.article-body h2::before {
  content: '';
  display: block;
  width: 32px;
  height: 3px;
  background: #c94a1b;
  margin-bottom: 16px;
}
.article-body h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: #0f2340;
  margin: 36px 0 14px;
  letter-spacing: -.005em;
}
.article-body p {
  font-size: 1rem;
  color: #333;
  line-height: 1.85;
  margin-bottom: 16px;
}
.article-body strong {
  color: #0f2340;
  font-weight: 700;
}
.article-body ul,
.article-body ol {
  margin: 12px 0 20px;
  padding-left: 24px;
  color: #333;
  font-size: 1rem;
  line-height: 1.85;
}
.article-body li { margin-bottom: 8px; }
.article-body li strong { color: #0f2340; }
.article-note {
  background: #fff8f3;
  border-left: 3px solid #c94a1b;
  padding: 20px 24px;
  margin: 24px 0;
  font-size: .95rem;
  color: #4a5162;
  line-height: 1.75;
  border-radius: 0 4px 4px 0;
}
.article-note strong { color: #c94a1b; }
.decision-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: .95rem;
  background: #fff;
  border: 1px solid #e5dfd0;
  border-radius: 4px;
  overflow: hidden;
}
.decision-table th,
.decision-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid #e5dfd0;
  vertical-align: top;
}
.decision-table th {
  background: #f5f2ed;
  color: #0f2340;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .04em;
}
.decision-table tr:last-child td { border-bottom: none; }
.decision-table td:first-child {
  color: #0f2340;
  font-weight: 700;
  width: 30%;
}
.decision-table td { color: #4a5162; }
.checklist {
  background: #0f2340;
  color: #fff;
  padding: 32px 36px;
  border-radius: 4px;
  margin: 32px 0;
}
.checklist-title {
  font-size: 12px;
  font-weight: 700;
  color: #ff8656;
  letter-spacing: .16em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.checklist ol {
  list-style: none;
  counter-reset: check;
  padding: 0;
  color: rgba(255,255,255,.9);
}
.checklist li {
  counter-increment: check;
  padding: 12px 0 12px 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  position: relative;
  font-size: .95rem;
  line-height: 1.65;
}
.checklist li:last-child { border-bottom: none; }
.checklist li::before {
  content: counter(check, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 12px;
  color: #ff8656;
  font-weight: 700;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  letter-spacing: .06em;
}
.formula {
  margin: 28px 0;
  padding: 28px 32px;
  background: #f5f2ed;
  border-radius: 4px;
  color: #0f2340;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.75;
}
.formula small {
  display: block;
  margin-top: 8px;
  color: #6b7280;
  font-size: .82rem;
  font-weight: 500;
}
.article-summary {
  margin-top: 64px;
  padding: 40px;
  background: #f5f2ed;
  border-radius: 4px;
}
.article-summary h3 {
  margin-top: 0;
  color: #0f2340;
}
.article-summary p {
  color: #4a5162;
  margin-bottom: 12px;
  line-height: 1.75;
}
.related {
  padding: 100px 0;
  background: #f5f2ed;
}
.related-title {
  text-align: center;
  margin-bottom: 48px;
}
.related-grid {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.related-card {
  padding: 32px 28px;
  background: #fff;
  border-radius: 4px;
  border: 1px solid #e5dfd0;
  transition: all .25s;
}
.related-card:hover {
  border-color: #c94a1b;
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(15,35,64,.08);
}
.related-num {
  font-size: 11px;
  color: #c94a1b;
  font-weight: 700;
  letter-spacing: .12em;
  margin-bottom: 14px;
}
.related-card h3 {
  font-size: 1.1rem;
  font-weight: 800;
  color: #0f2340;
  margin-bottom: 8px;
  line-height: 1.3;
}
.related-card p {
  font-size: .88rem;
  color: #6b7280;
  line-height: 1.6;
}
@media (max-width: 900px) {
  .article { padding: 60px 0 80px; }
  .article-wrap { padding: 0 24px; }
  .article-toc { padding: 24px; }
  .article-body h2 { margin: 48px 0 16px; }
  .checklist,
  .article-summary,
  .formula { padding: 28px 24px; }
  .decision-table th,
  .decision-table td {
    padding: 12px 14px;
    font-size: .9rem;
  }
  .related { padding: 60px 0; }
  .related-grid {
    grid-template-columns: 1fr;
    padding: 0 24px;
  }
}
@media (max-width: 560px) {
  .decision-table {
    display: block;
    overflow-x: auto;
    white-space: normal;
  }
}