/**
 * 组件与工具类 — 与 UI/css/style.css 同源（无 @import，由布局按序引入）
 */
.bg-mia-primary {
  background-color: var(--mia-primary) !important;
}

.bg-mia-dark {
  background-color: var(--mia-dark) !important;
}

.bg-mia-light {
  background-color: var(--mia-light) !important;
}

.text-mia-primary {
  color: var(--mia-primary) !important;
}

.text-mia-accent {
  color: var(--mia-accent) !important;
}

.border-mia-accent {
  border-color: var(--mia-accent) !important;
}

.hero-carousel .carousel-item {
  min-height: 28rem;
  background: linear-gradient(135deg, var(--mia-primary) 0%, var(--mia-primary-light) 55%, var(--mia-secondary) 100%);
}

.hero-carousel .carousel-item.hero-bg-alt-a {
  background: linear-gradient(135deg, #0a1c33 0%, var(--mia-primary-light) 50%, #1a4a6e 100%);
}

.hero-carousel .carousel-item.hero-bg-alt-b {
  background: linear-gradient(135deg, var(--mia-secondary) 0%, var(--mia-primary) 48%, #123a5c 100%);
}

.hero-carousel .carousel-caption {
  bottom: 22%;
  padding-bottom: 1rem;
}

.hero-carousel .carousel-caption h1 {
  color: #fff;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
}

.hero-carousel .carousel-caption .lead {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  opacity: 0.95;
}

@media (max-width: 991.98px) {
  .hero-carousel .carousel-item {
    min-height: 22rem;
  }
}

.section-title {
  position: relative;
  padding-bottom: 0.85rem;
  margin-bottom: 2rem;
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 3.5rem;
  height: 4px;
  background: var(--mia-accent);
  border-radius: 2px;
}

.section-title.text-center::after {
  left: 50%;
  transform: translateX(-50%);
}

.card-hover {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card-hover:hover {
  transform: translateY(-5px);
  box-shadow: 0 0.75rem 2rem rgba(12, 35, 64, 0.12) !important;
}

.member-level-card {
  border-top: 4px solid var(--mia-accent);
  border-radius: 0.35rem;
}

.sidebar-nav .list-group-item.active {
  background-color: var(--mia-primary);
  border-color: var(--mia-primary);
}

.stat-card {
  border-left: 4px solid var(--mia-primary);
  transition: border-color 0.2s ease;
}

.stat-card:hover {
  border-left-color: var(--mia-accent);
}

.admin-sidebar {
  min-height: 100vh;
  width: 260px;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1040;
}

.admin-content {
  margin-left: 260px;
}

.btn-primary {
  font-weight: 600;
  padding: 0.5rem 1.15rem;
}

.btn-primary:hover {
  background-color: var(--mia-accent-hover);
  border-color: var(--mia-accent-hover);
}

.btn-lg {
  padding: 0.65rem 1.35rem;
  font-size: 1.1rem;
}

@media (max-width: 991.98px) {
  .admin-sidebar {
    width: 0;
    overflow: hidden;
  }

  .admin-content {
    margin-left: 0;
  }
}

.nav-tabs .nav-link {
  font-weight: 600;
  font-size: 1.02rem;
}

.card-title {
  font-size: 1.15rem;
}

.list-group-item {
  font-size: 1.02rem;
}