html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* 自定义样式 */
.bg-gradient {
  background: linear-gradient(135deg, #4a6fa5 0%, #2c3e50 100%);
}

.card {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.jumbotron {
  background: linear-gradient(135deg, #4a6fa5 0%, #2c3e50 100%);
  color: white;
  padding: 3rem 1rem;
  margin-bottom: 2rem;
  border-radius: 0.5rem;
}

.list-group-item {
  border: none;
  padding: 1rem;
  margin-bottom: 0.5rem;
  border-radius: 0.3rem;
  background-color: #f8f9fa;
  transition: background-color 0.3s ease;
}

.list-group-item:hover {
  background-color: #e9ecef;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .jumbotron {
    padding: 2rem 1rem;
  }
  
  .card {
    margin-bottom: 1rem;
  }
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
  color: var(--bs-secondary-color);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
  text-align: start;
}