/* 官方学习路线 */
.path-hero {
  margin-top: 1.4rem;
  background: linear-gradient(135deg, #1b7a6e 0%, #2a9d8f 45%, #99f6e4 100%);
  color: #fff;
  border-radius: 22px;
  padding: 1.6rem 1.4rem;
  box-shadow: var(--shadow);
}
.path-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  font-weight: 800;
  margin: 0.3rem 0 0.5rem;
}
.path-hero p { opacity: 0.92; max-width: 36rem; }
.path-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}
.path-stats span {
  background: rgba(255, 255, 255, 0.18);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}

.method-grid {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}
@media (min-width: 640px) {
  .method-grid { grid-template-columns: repeat(3, 1fr); }
}
.method-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}
.method-card b { display: block; font-size: 0.95rem; margin-bottom: 0.25rem; }
.method-card p { font-size: 0.88rem; color: var(--muted); margin: 0; }

.stage-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1.2rem 0 0.75rem;
}
.stage-tab {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink-soft);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
}
.stage-tab.is-on {
  background: var(--leaf);
  border-color: var(--leaf);
  color: #fff;
}

.stage-panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem 1.25rem;
  margin-bottom: 1rem;
}
.stage-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1rem;
  margin-bottom: 0.75rem;
}
.stage-head h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0;
}
.stage-meta { font-size: 0.88rem; color: var(--muted); }
.stage-units {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.6rem 0 0.85rem;
}
.unit-chip {
  font-size: 0.78rem;
  background: var(--sky);
  color: var(--ink-soft);
  padding: 0.25rem 0.55rem;
  border-radius: 8px;
  font-weight: 600;
}
.graduate {
  font-size: 0.88rem;
  color: var(--leaf-dark);
  background: rgba(42, 157, 143, 0.08);
  padding: 0.55rem 0.75rem;
  border-radius: 10px;
  margin-bottom: 0.85rem;
}

.lesson-road {
  display: grid;
  gap: 0.55rem;
}
.lesson-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.65rem;
  align-items: center;
  padding: 0.65rem 0.75rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--paper);
  text-decoration: none;
  color: inherit;
}
.lesson-row.is-live:hover { border-color: var(--leaf); background: #fff; }
.lesson-row.is-planned { opacity: 0.72; cursor: default; }
.lesson-row .emoji { font-size: 1.35rem; }
.lesson-row .t { font-weight: 700; font-size: 0.92rem; }
.lesson-row .g { font-size: 0.8rem; color: var(--muted); }
.badge-live {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--leaf-dark);
  background: rgba(42, 157, 143, 0.12);
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
}
.badge-soon {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--muted);
  background: rgba(91, 115, 144, 0.1);
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
}

.milestone-list {
  display: grid;
  gap: 0.6rem;
}
@media (min-width: 640px) {
  .milestone-list { grid-template-columns: repeat(2, 1fr); }
}
.milestone {
  border-left: 4px solid var(--leaf);
  padding: 0.65rem 0.85rem;
  background: var(--white);
  border-radius: 0 12px 12px 0;
  border: 1px solid var(--line);
  border-left-width: 4px;
}
.milestone b { font-size: 0.9rem; }
.milestone p { font-size: 0.82rem; color: var(--muted); margin: 0.2rem 0 0; }