/* 教程文章页 */
.article-error {
  margin: 18px 0;
  padding: 14px 16px;
  border: 1px solid #fecaca;
  border-radius: 12px;
  background: #fef2f2;
  color: #b91c1c;
  font-size: 13px;
}
.article-error a { color: #b91c1c; font-weight: 700; text-decoration: underline; }

.article-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.82fr);
  gap: 26px;
  align-items: center;
  padding: 12px 0 26px;
  border-bottom: 1px solid #f1f5f9;
}
.article-category {
  display: inline-flex;
  width: fit-content;
  border-radius: 999px;
  background: #f5f3ff;
  padding: 4px 10px;
  color: var(--violet-dark);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.04em;
}
.article-hero h1 {
  margin: 12px 0 0;
  color: #0f172a;
  font-size: clamp(30px, 4.4vw, 48px);
  line-height: 1.12;
  letter-spacing: -0.04em;
  text-wrap: balance;
}
.article-hero h1 { max-width: 680px; }
.article-lede {
  max-width: 650px;
  margin: 13px 0 0;
  color: #64748b;
  font-size: 14px;
  line-height: 1.85;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 14px 0 0;
  color: #94a3b8;
  font-size: 11px;
}
.article-cover-wrap {
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid #e2e8f0;
  background: #f8fafc;
  aspect-ratio: 16 / 10;
}
.article-cover-wrap img { width: 100%; height: 100%; object-fit: cover; display: block; }

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 30px;
  align-items: start;
  padding-top: 26px;
}
.article-body {
  min-width: 0;
  color: #475569;
  font-size: 14px;
  line-height: 1.95;
}
.article-body h2 {
  margin: 32px 0 10px;
  color: #0f172a;
  font-size: 23px;
  line-height: 1.35;
  letter-spacing: -0.025em;
  scroll-margin-top: 20px;
}
.article-body h2:first-child { margin-top: 0; }
.article-body p { margin: 0 0 14px; }
.article-body strong { color: #1e293b; font-weight: 700; }
.article-body ul {
  margin: 0 0 16px;
  padding-left: 20px;
  list-style: disc;
}
.article-body li { margin: 5px 0; }
.article-body a {
  color: var(--violet-dark);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.article-body a:hover { color: #4c1d95; }

.article-sidebar {
  position: sticky;
  top: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.article-side-card {
  border: 1px solid #e2e8f0;
  border-radius: 15px;
  background: #fff;
  padding: 15px;
}
.article-side-kicker {
  margin: 0 0 8px;
  color: #a78bfa;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.article-side-card nav { display: flex; flex-direction: column; gap: 1px; }
.article-side-card nav a {
  display: block;
  border-radius: 7px;
  padding: 5px 7px;
  color: #64748b;
  font-size: 11px;
  line-height: 1.5;
}
.article-side-card nav a:hover { background: #f5f3ff; color: var(--violet-dark); text-decoration: none; }
.article-side-cta { background: linear-gradient(145deg, #faf5ff, #fff); border-color: #ddd6fe; }
.article-side-cta strong { display: block; color: #1e293b; font-size: 14px; }
.article-side-cta p { margin: 6px 0 12px; color: #64748b; font-size: 11px; line-height: 1.7; }
.article-side-cta .btn-primary { display: block; text-align: center; padding: 9px 12px; font-size: 12px; }
.article-side-link { display: block; margin-top: 9px; font-size: 10px; font-weight: 700; text-align: center; }

.article-back { margin-top: 26px; padding-top: 18px; border-top: 1px solid #f1f5f9; }
.article-back a { color: #64748b; font-size: 12px; font-weight: 600; }
.article-back a:hover { color: var(--violet-dark); }

@media (max-width: 820px) {
  .article-hero { grid-template-columns: 1fr; gap: 18px; }
  .article-cover-wrap { aspect-ratio: 16 / 9; }
  .article-layout { grid-template-columns: 1fr; gap: 20px; }
  .article-sidebar { position: static; order: 2; }
  .article-side-card:first-child { display: none; }
  .article-body h2 { font-size: 20px; }
}
@media (max-width: 560px) {
  .article-hero h1 { font-size: 30px; }
  .article-lede { font-size: 13px; }
  .article-body { font-size: 13px; line-height: 1.9; }
  .article-body h2 { font-size: 19px; }
}