/* 简化版Bootstrap CSS */
:root {
  --bs-blue: #0d6efd;
  --bs-primary: #0d6efd;
  --bs-secondary: #6c757d;
  --bs-success: #198754;
  --bs-info: #0dcaf0;
  --bs-warning: #ffc107;
  --bs-danger: #dc3545;
  --bs-light: #f8f9fa;
  --bs-dark: #212529;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: #212529;
  background-color: #fff;
}

.container {
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
  margin-right: auto;
  margin-left: auto;
}

.container-fluid {
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
  margin-right: auto;
  margin-left: auto;
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin-right: -15px;
  margin-left: -15px;
}

.col, .col-md-4, .col-md-6, .col-12 {
  position: relative;
  width: 100%;
  min-height: 1px;
  padding-right: 15px;
  padding-left: 15px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  word-wrap: break-word;
  background-color: #fff;
  background-clip: border-box;
  border: 1px solid rgba(0,0,0,.125);
  border-radius: .25rem;
}

.card-header {
  padding: .75rem 1.25rem;
  margin-bottom: 0;
  background-color: rgba(0,0,0,.03);
  border-bottom: 1px solid rgba(0,0,0,.125);
}

.card-body {
  flex: 1 1 auto;
  padding: 1.25rem;
}

.form-control {
  display: block;
  width: 100%;
  padding: .375rem .75rem;
  font-size: 1rem;
  line-height: 1.5;
  color: #495057;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid #ced4da;
  border-radius: .25rem;
  transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}

.btn {
  display: inline-block;
  font-weight: 400;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  user-select: none;
  border: 1px solid transparent;
  padding: .375rem .75rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: .25rem;
  transition: color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}

.btn-primary {
  color: #fff;
  background-color: var(--bs-primary);
  border-color: var(--bs-primary);
}

.btn-secondary {
  color: #fff;
  background-color: var(--bs-secondary);
  border-color: var(--bs-secondary);
}

.btn-danger {
  color: #fff;
  background-color: var(--bs-danger);
  border-color: var(--bs-danger);
}

.table {
  width: 100%;
  margin-bottom: 1rem;
  background-color: transparent;
  border-collapse: collapse;
}

.table th, .table td {
  padding: .75rem;
  vertical-align: top;
  border-top: 1px solid #dee2e6;
}

.navbar {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding: .5rem 1rem;
}

.navbar-dark {
  background-color: var(--bs-dark);
}

.navbar-nav {
  display: flex;
  flex-direction: column;
  padding-left: 0;
  margin-bottom: 0;
  list-style: none;
}

.nav-link {
  display: block;
  padding: .5rem 1rem;
  text-decoration: none;
  color: white;
}

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1040;
  width: 100vw;
  height: 100vh;
  background-color: #000;
  opacity: 0.5;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1050;
  width: 100%;
  height: 100%;
  overflow: hidden;
  outline: 0;
  display: none;
}

.modal.show {
  display: block;
}

.modal-content {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  pointer-events: auto;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid rgba(0,0,0,.2);
  border-radius: .3rem;
  outline: 0;
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 1rem 1rem;
  border-bottom: 1px solid #dee2e6;
  border-top-left-radius: calc(.3rem - 1px);
  border-top-right-radius: calc(.3rem - 1px);
}

.modal-body {
  position: relative;
  flex: 1 1 auto;
  padding: 1rem;
}