.trn-hero {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-5);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.trn-hero::after {
  content: "";
  position: absolute;
  top: -60px;
  right: -40px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
}
.trn-hero::before {
  content: "";
  position: absolute;
  bottom: -70px;
  left: -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}
.trn-hero-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  position: relative;
}
.trn-hero-icon svg {
  width: 26px;
  height: 26px;
}
.trn-hero h2 {
  font-family: var(--font-display);
  margin: 0 0 8px;
  font-size: 1.3rem;
  position: relative;
}
.trn-hero p {
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.92);
  max-width: 480px;
  line-height: 1.55;
  font-size: 13.5px;
  position: relative;
}

.trn-category {
  margin-top: var(--space-5);
}
.trn-category-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: 0 0 var(--space-3) 2px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}
.trn-category-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.trn-category-icon svg {
  width: 18px;
  height: 18px;
}
.trn-category-icon.c1 { background: rgba(79, 70, 229, 0.12); color: var(--color-primary); }
.trn-category-icon.c2 { background: rgba(6, 182, 212, 0.12); color: var(--color-accent); }
.trn-category-icon.c3 { background: rgba(22, 163, 74, 0.12); color: var(--color-success); }
.trn-category-icon.c4 { background: rgba(220, 38, 38, 0.12); color: var(--color-danger); }
.trn-category-icon.c5 { background: rgba(245, 158, 11, 0.12); color: var(--color-warning); }
.trn-category-icon.c6 { background: rgba(14, 165, 233, 0.12); color: #0ea5e9; }

.trn-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2px 0;
  overflow: hidden;
}

.trn-item {
  border-top: 1px solid var(--color-border);
  transition: background var(--transition);
}
.trn-item:first-child {
  border-top: none;
}
.trn-item[open] {
  background: var(--color-bg);
}
.trn-item summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  font-weight: 600;
  font-size: 13.5px;
  color: var(--color-text);
  transition: color var(--transition);
}
.trn-item summary::-webkit-details-marker {
  display: none;
}
.trn-item summary:hover {
  color: var(--color-primary);
}
.trn-item summary::after {
  content: "";
  width: 9px;
  height: 9px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--transition);
  opacity: 0.45;
  flex-shrink: 0;
}
.trn-item[open] summary::after {
  transform: rotate(-135deg);
}
.trn-item[open] summary {
  color: var(--color-primary);
}
.trn-item-body {
  padding: 0 var(--space-4) var(--space-4);
}
.trn-item-body p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.6;
  font-size: 12.8px;
}
.trn-item-body strong {
  color: var(--color-text);
}