/* ============================================================
   MediaPulse Article v2 — tutorial / article layout
   Depends on design-system.css. Targets the class names emitted
   by the article generator (no body markup changes required).
   ============================================================ */

/* container kept for <main class="wrap"> and .related .wrap */
.wrap { width: min(var(--container), calc(100% - 2 * var(--space-24))); margin-inline: auto; }

/* Breadcrumb */
.crumb {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  margin: var(--space-32) 0 var(--space-24);
  font-size: 13px; color: var(--muted-2);
}
.crumb a { color: var(--muted); transition: color 0.2s ease; }
.crumb a:hover { color: var(--primary); }

/* Layout: article + TOC sidebar */
.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: var(--space-48);
  align-items: start;
  padding-bottom: var(--space-64);
}

/* Article card */
.article {
  background: var(--card);
  border: var(--border-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--space-48) var(--space-48) var(--space-64);
  min-width: 0;
}
.label {
  display: inline-block;
  margin-bottom: var(--space-16);
  font-size: 13px; font-weight: 600; letter-spacing: 0.04em;
  color: var(--primary);
  background: rgba(79, 107, 255, 0.08);
  border: 1px solid rgba(79, 107, 255, 0.16);
  padding: 5px 12px; border-radius: 999px;
}
.article > h1 {
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.18; letter-spacing: -0.035em;
  margin: 0 0 var(--space-32);
}
.article h2 {
  font-size: clamp(20px, 2.2vw, 26px);
  letter-spacing: -0.03em;
  margin: var(--space-48) 0 var(--space-16);
  scroll-margin-top: calc(var(--nav-h) + 24px);
}
.article h3 { font-size: 19px; margin: var(--space-32) 0 var(--space-12); letter-spacing: -0.02em; }
.article p { font-size: 16px; line-height: 1.85; color: var(--ink-2); margin: 0 0 var(--space-20); }
.article ul, .article ol { margin: 0 0 var(--space-20); padding-left: 1.4em; }
.article li { font-size: 16px; line-height: 1.8; color: var(--ink-2); margin: 6px 0; }
.article b, .article strong { color: var(--ink); font-weight: 700; }
.article a {
  color: var(--primary); text-decoration: none;
  border-bottom: 1px solid rgba(79, 107, 255, 0.3); transition: border-color 0.2s ease;
}
.article a:hover { border-color: var(--primary); }
.article code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13.5px; background: rgba(79, 107, 255, 0.1);
  color: #2b3a8f; padding: 2px 6px; border-radius: 6px;
}

/* Article cover image */
.hero-art {
  margin: var(--space-32) 0 var(--space-40);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--dark);
  box-shadow: 0 16px 48px rgba(5, 8, 22, 0.1);
}
.hero-art img {
  width: 100%;
  height: auto;
  display: block;
  margin: 0;
  border-radius: 0;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.article pre {
  background: var(--dark); color: #e7ecff; padding: var(--space-20);
  border-radius: 14px; overflow-x: auto; font-size: 13.5px; line-height: 1.6;
  margin: var(--space-24) 0;
}
.article pre code { background: none; color: inherit; padding: 0; }
.article img, .article figure { max-width: 100%; border-radius: 12px; margin: var(--space-16) 0; }
.article blockquote {
  margin: var(--space-24) 0; padding: var(--space-16) var(--space-24);
  border-left: 4px solid var(--secondary);
  background: var(--bg); border-radius: 0 12px 12px 0;
  color: var(--muted); font-style: italic;
}

/* Callout (highlight box) */
.callout {
  margin: var(--space-24) 0;
  padding: var(--space-20) var(--space-24);
  background: linear-gradient(135deg, rgba(79, 107, 255, 0.08), rgba(110, 124, 255, 0.05));
  border: 1px solid rgba(79, 107, 255, 0.22);
  border-left: 4px solid var(--primary);
  border-radius: 14px;
  font-size: 15.5px; line-height: 1.75; color: var(--ink-2);
}
.callout b { color: var(--ink); }

/* ===== 示范图模块卡（技术技巧一块一图） ===== */
.skill-map {
  display: grid;
  gap: var(--space-24);
  margin: var(--space-32) 0;
}
.skill-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
  overflow: hidden;
  box-shadow: 0 8px 28px rgba(5, 8, 22, 0.04);
}
.skill-card-head {
  display: flex; align-items: flex-start; gap: 14px;
  padding: var(--space-20) var(--space-24) 12px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #f4f6ff 0%, #fff 100%);
}
.skill-num {
  flex: 0 0 auto;
  width: 36px; height: 36px; border-radius: 10px;
  display: grid; place-items: center;
  font-size: 14px; font-weight: 800; color: #fff;
  background: var(--grad-primary);
}
.skill-card-head h3 {
  margin: 0 0 4px !important;
  font-size: 18px !important;
  letter-spacing: -0.02em;
}
.skill-takeaway {
  margin: 0;
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.55;
}
.skill-viz {
  margin: 0;
  padding: var(--space-20) var(--space-24);
  background: #f7f8fc;
  border-bottom: 1px solid var(--line);
}
.skill-viz svg { width: 100%; height: auto; display: block; }
.skill-body {
  padding: var(--space-20) var(--space-24) var(--space-24);
}
.skill-body p { margin: 0 0 12px; font-size: 15px; }
.skill-body ul { margin: 0; }
.skill-body li { font-size: 14.5px; margin: 4px 0; }
.skill-do {
  display: inline-block;
  margin-top: 12px;
  font-size: 12.5px; font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--primary);
  text-transform: uppercase;
}
.flow-arrow {
  display: flex; justify-content: center; align-items: center;
  color: var(--muted-2); font-size: 22px; line-height: 1;
  margin: -4px 0;
}
.pillars-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 12px;
}
.pillar {
  text-align: center;
  padding: 14px 10px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--bg);
}
.pillar b { display: block; font-size: 14px; margin-bottom: 4px; }
.pillar span { font-size: 12.5px; color: var(--muted); line-height: 1.4; }
@media (max-width: 720px) {
  .pillars-row { grid-template-columns: 1fr; }
}

/* Comparison table */
.table-wrap { margin: var(--space-24) 0; overflow-x: auto; }
.compare, .article table {
  width: 100%; border-collapse: collapse; font-size: 14.5px;
}
.compare th, .article table th {
  text-align: left; background: var(--bg);
  font-weight: 700; color: var(--ink);
  padding: 12px 14px; border-bottom: 2px solid rgba(79, 107, 255, 0.2);
}
.compare td, .article table td {
  padding: 11px 14px; border-bottom: 1px solid var(--line); color: var(--ink-2);
}
.compare tr:last-child td, .article table tr:last-child td { border-bottom: none; }
.compare tbody tr:hover, .article table tbody tr:hover { background: rgba(79, 107, 255, 0.04); }

/* Next link */
.next-link {
  margin: var(--space-32) 0;
  padding: var(--space-20) var(--space-24);
  background: var(--bg); border: 1px solid var(--line); border-radius: 14px;
  font-size: 15px; color: var(--muted);
}
.next-link a { font-weight: 700; border-bottom: none; color: var(--primary); }

/* TOC sidebar */
.toc {
  position: sticky; top: calc(var(--nav-h) + 24px);
  background: var(--card); border: var(--border-card); border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--space-24);
}
.toc b {
  display: block; margin-bottom: var(--space-12);
  font-size: 13px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted-2);
}
#tocLinks { display: flex; flex-direction: column; gap: 2px; }
#tocLinks a {
  display: block; padding: 7px 10px; border-radius: 8px;
  color: var(--muted); font-size: 13.5px; line-height: 1.5;
  border-bottom: none !important; transition: background 0.2s ease, color 0.2s ease;
}
#tocLinks a:hover { background: rgba(79, 107, 255, 0.06); color: var(--ink); }

/* Related / 继续阅读 */
.related { background: var(--bg); border-top: 1px solid var(--line); padding: var(--space-64) 0; }
.related h2 { font-size: 24px; letter-spacing: -0.03em; margin: 0 0 var(--space-32); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--grid-gap); }
.related-card {
  background: var(--card); border: var(--border-card); border-radius: var(--radius-card);
  box-shadow: var(--shadow-card); padding: 0; overflow: hidden;
  display: flex; flex-direction: column; gap: 0;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.3s ease, border-color 0.3s ease;
}
.related-card:hover { transform: translateY(-6px); border-color: rgba(79, 107, 255, 0.3); box-shadow: var(--shadow-lift); }
.related-card .related-cover {
  display: block; aspect-ratio: 16 / 9; overflow: hidden; background: var(--dark);
}
.related-card .related-cover img {
  width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.4s ease;
}
.related-card:hover .related-cover img { transform: scale(1.04); }
.related-card .related-body {
  display: flex; flex-direction: column; gap: 8px; padding: var(--space-24); flex: 1;
}
.related-card small { font-size: 12px; font-weight: 600; color: var(--primary); letter-spacing: 0.04em; }
.related-card h3 { margin: 0; font-size: 17px; letter-spacing: -0.02em; }
.related-card p { margin: 0; font-size: 13.5px; color: var(--muted); flex: 1; }
.related-card a { font-size: 13.5px; font-weight: 600; color: var(--primary); border-bottom: none; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-grid { grid-template-columns: 1fr; }
  .toc { position: static; order: -1; }
  .related-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .article { padding: var(--space-24); }
  .article p, .article li { font-size: 15px; }
  .related-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001s !important; transition-duration: 0.001s !important; }
}