/* 第四模块：全方位赛事服务 */
#departments-4.departments-4-section {
  background: #1a1d21;
  color: #fff;
  padding: 4.5rem 0;
}

#departments-4 .departments-4-header {
  text-align: center;
  margin-bottom: 2.75rem;
}

#departments-4 .departments-4-header h2 {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 0;
  padding-bottom: 14px;
  position: relative;
  display: inline-block;
}

#departments-4 .departments-4-header h2::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 56px;
  height: 4px;
  background: #0091ff;
  border-radius: 2px;
}

#departments-4 .departments-4-header p {
  max-width: 720px;
  margin: 1rem auto 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.95rem;
  line-height: 1.7;
}

#departments-4 .departments-4-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

#departments-4 .d4-card {
  background: #24282d;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}

#departments-4 .d4-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

#departments-4 .d4-card-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: cover;
  display: block;
}

#departments-4 .d4-card-body {
  padding: 1.35rem 1.25rem 1.5rem;
  flex: 1;
}

#departments-4 .d4-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.65rem;
}

#departments-4 .d4-card-text {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.68);
  line-height: 1.7;
  margin-bottom: 0;
}

@media (max-width: 991.98px) {
  #departments-4 .departments-4-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 575.98px) {
  #departments-4.departments-4-section {
    padding: 3rem 0;
  }

  #departments-4 .departments-4-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}