:root {
  --section-mobile-padding: 2.5rem;
  --section-mobile-padding-sm: 2rem;
}

/* 优化平板与小屏导航 */
@media (max-width: 991.98px) {
  .navbar-custom {
    padding: 0.75rem 1rem;
  }

  .navbar-custom .navbar-nav {
    padding: 0.5rem 0;
    background-color: #ffffff;
    border-radius: 0.5rem;
    box-shadow: 0 0.5rem 1.25rem rgba(15, 27, 40, 0.1);
  }

  .navbar-custom .navbar-nav .nav-link {
    padding: 0.75rem 1rem;
    text-align: center;
  }

  .hero-1-bg {
    text-align: center;
  }

  .hero-1-bg .d-flex {
    justify-content: center;
  }
}

/* 手机端重点适配 */
@media (max-width: 767.98px) {
  .section {
    padding: var(--section-mobile-padding) 0;
  }

  .hero-1-bg {
    padding-top: 3.25rem;
    padding-bottom: 2.25rem;
  }

  .hero-1-bg .row {
    flex-direction: column-reverse;
  }

  .hero-1-bg .col-lg-6 {
    text-align: center;
  }

  .hero-1-bg img {
    max-width: 72%;
    margin: 0 auto 1.25rem;
  }

  .hero-1-bg .btn {
    width: 100%;
    margin-right: 0 !important;
    display: block;
    padding: 0.65rem 1rem;
    font-size: 0.95rem;
  }

  .hero-1-bg .btn + .btn {
    margin-left: 0;
  }

  .hero-1-bg .btn + .btn {
    margin-top: 0.75rem;
  }

  .hero-1-bg .display-4 {
    font-size: 1.85rem;
    line-height: 1.25;
    margin-bottom: 1rem;
  }

  .hero-1-bg p {
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 1.25rem;
  }

  .card.p-5 {
    padding: 2rem !important;
  }

  .service-box {
    margin-bottom: 1.5rem;
  }

  .feature-card {
    flex-direction: column;
    text-align: center;
  }

  .feature-card .avatar-lg {
    margin: 0 auto 1rem;
  }

  .vision-content {
    text-align: center;
    flex-direction: column;
  }

  .vision-content .vision-title {
    text-align: center !important;
    width: 100%;
  }

  .vision-content .vision-item {
    font-size: 1.125rem;
    text-align: center;
  }

  #contact .badge {
    display: block;
    margin-bottom: 0.75rem;
    text-align: center;
  }

  .footer .row > [class*="col-"] {
    margin-bottom: 1.25rem;
  }
}

@media (max-width: 575.98px) {
  .display-4,
  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.3rem;
  }

  .section {
    padding: var(--section-mobile-padding-sm) 0;
  }

  .card.p-5 {
    padding: 1.5rem !important;
  }

  .hero-1-bg .display-4 {
    font-size: 1.6rem;
  }

  .hero-1-bg p {
    font-size: 0.9rem;
  }

  .hero-1-bg .btn {
    font-size: 0.9rem;
    padding: 0.55rem 0.9rem;
  }

  .hero-1-bg img {
    max-width: 78%;
  }

  .vision-content .vision-item {
    font-size: 1rem;
  }

  .footer-sub-menu {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
  }

  .footer-sub-menu li {
    margin: 0;
  }

  .footer-sub-menu li a {
    display: inline-block;
  }
}

@media (max-width: 768px) {
  .vision-content .vision-title {
    font-size: 1.5rem;
    line-height: 1.3;
  }
}