body.ui-style-3 {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

main {
  min-height: calc(100vh - 200px);
}

section {
  animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .container {
    padding: 0 15px;
  }

  main {
    padding: 20px 10px !important;
  }

  h1 {
    font-size: 24px !important;
  }

  h2 {
    font-size: 20px !important;
  }

  article {
    padding: 20px !important;
  }
}

a {
  transition: color 0.3s, background-color 0.3s;
}

button, .btn {
  cursor: pointer;
  transition: all 0.3s;
}

button:hover, .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}