/* === 烽讯加速器 品牌主题 === */
:root {
  --primary:        #1d4ed8;
  --primary-light:  #60a5fa;
  --primary-dark:   #1e3a8a;
  --primary-rgb:    29, 78, 216;
  --primary-bg:     #eff6ff;

  --hero-bg-start:  #071224;
  --hero-bg-end:    #102a56;
  --hero-accent:    #38bdf8;

  --accent:         #f97316;
  --accent-dark:    #ea580c;
  --accent-rgb:     249, 115, 22;
}
/* === 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;
  }
}