/* === 资质认证模块 === */
.credential-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.credential-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 20px;
  border: 1px solid var(--border-color);
  text-align: center;
  transition: var(--transition);
}

.credential-item:hover {
  transform: translateY(-3px);
  border-color: var(--accent-gold);
}

.credential-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.credential-item h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--accent-gold);
}

.credential-item p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* === 传媒教程标签 === */
.tutorial-tag {
  display: inline-block;
  background: var(--accent-purple-dim);
  color: var(--accent-purple);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* === 专家占位头像 === */
.expert-avatar-placeholder {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin: 0 auto 16px;
  border: 3px solid var(--accent-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  background: var(--bg-secondary);
}

/* === 响应式补充 === */
@media (max-width: 1024px) {
  .credential-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .credential-grid { grid-template-columns: 1fr; }
}