body, html {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: "Microsoft JhengHei", Arial, sans-serif;
  color: white;
  position: relative;
  overflow-x: hidden;
}

.background {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  background: url('photo.jpeg') no-repeat center center fixed;
  background-size: cover;
  z-index: -2;
}

.overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  background-color: rgba(0, 0, 0, 0.4);
  z-index: -1;
}

.hero {
  height: 90vh;
  padding-top: 3rem;
  padding-bottom: 1rem;
}

.navbar {
  background-color: transparent !important;
}

.nav-link {
  font-weight: bold;
}

.link-icon {
  transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 50px;
  height: 50px;
  font-size: 22px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
  text-decoration: none;
}
.link-icon:hover {
  transform: scale(1.2);
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.4);
  background-color: rgba(255, 255, 255, 0.2);
}

.footer {
  background-color: transparent;
}

.footer p {
  font-size: 0.8rem;
}
.specialty-card {
  background-color: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  padding: 1.5rem;
  border-radius: 1rem;
  transition: transform 0.2s ease;
  height: 100%;
  text-align: center;
}

.specialty-card:hover {
  transform: translateY(-5px);
}

.specialty-card i {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: white;
}

.specialty-card h5 {
  font-weight: bold;
  margin-bottom: 0.5rem;
}

.specialty-card p {
  font-size: 0.95rem;
  margin: 0;
}