/* ============================================
   天行代理 — 品牌配色覆盖（深蓝主题）
   ============================================ */
:root {
  --primary: #1a5ab8;
  --primary-light: #3d7dd9;
  --primary-dark: #0e3d7a;
  --primary-bg: #e8f0fe;
  --primary-rgb: 26, 90, 184;

  --hero-bg-start: #071224;
  --hero-bg-end: #142d52;
  --hero-accent: #4dabff;

  /* 天行专属辅色：热销橙 */
  --accent: #ff6b35;
  --accent-rgb: 255, 107, 53;
  --accent-dark: #e05520;
  --success: #10b981;
  --warning: #fbbf24;
}
/* === Official brand information blocks === */
.official-brand-block,
.official-steps {
  padding: 72px 0;
  background: #fff;
}

.official-brand-block + .official-steps {
  padding-top: 0;
}

.official-grid,
.official-step-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.official-card,
.official-step-card {
  height: 100%;
  border: 1px solid rgba(var(--primary-rgb), .14);
  border-radius: 8px;
  background: linear-gradient(180deg, #fff, rgba(var(--primary-rgb), .035));
  padding: 24px;
  box-shadow: 0 14px 36px rgba(15, 23, 42, .06);
}

.official-card i,
.official-step-card i {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  background: rgba(var(--primary-rgb), .1);
  margin-bottom: 16px;
}

.official-card h3,
.official-step-card h3 {
  margin: 0 0 10px;
  color: var(--text-primary, #0f172a);
  font-size: 18px;
  line-height: 1.35;
}

.official-card p,
.official-step-card p {
  margin: 0;
  color: var(--text-secondary, #475569);
  line-height: 1.75;
  font-size: 15px;
}

.official-step-card .step-index {
  display: inline-flex;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: #fff;
  background: var(--primary);
  font-weight: 800;
  margin-bottom: 14px;
}

.official-note-card {
  margin-top: 26px;
  border-left: 4px solid var(--primary);
  border-radius: 8px;
  background: rgba(var(--primary-rgb), .08);
  padding: 18px 20px;
  color: var(--text-secondary, #475569);
  line-height: 1.75;
}

@media (max-width: 1024px) {
  .official-grid,
  .official-step-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .official-brand-block,
  .official-steps {
    padding: 52px 0;
  }

  .official-grid,
  .official-step-grid {
    grid-template-columns: 1fr;
  }

  .official-card,
  .official-step-card {
    padding: 20px;
  }
}