/* 主页样式文件 */
:root {
  --primary-color: #0d6efd;
  --secondary-color: #6c757d;
  --success-color: #198754;
  --danger-color: #dc3545;
  --warning-color: #ffc107;
  --info-color: #0dcaf0;
  --light-color: #f8f9fa;
  --dark-color: #212529;
  --white-color: #fff;
  --black-color: #000;
  
  --navbar-bg: #f8f9fa;
  --content-bg: #fff;
  --footer-bg: #f8f9fa;
  
  --text-dark: #212529;
  --text-muted: #6c757d;
  --border-color: #dee2e6;
  --hover-bg: #e9ecef;
  
  --font-family-sans-serif: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-monospace: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

body {
  font-family: var(--font-family-sans-serif);
  background-color: var(--content-bg);
  color: var(--text-dark);
  line-height: 1.5;
}

/* 容器和布局 */
.container-fluid {
  padding-left: 15px;
  padding-right: 15px;
}

/* 卡片组件 */
.card {
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  margin-bottom: 1rem;
}

.card-header {
  background-color: var(--light-color);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 1.25rem;
  border-top-left-radius: calc(0.375rem - 1px);
  border-top-right-radius: calc(0.375rem - 1px);
}

.card-body {
  padding: 1.25rem;
}

.card-title {
  margin-bottom: 0.75rem;
}

/* 表单元素 */
.form-control {
  display: block;
  width: 100%;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-dark);
  background-color: var(--white-color);
  background-clip: padding-box;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
  color: var(--text-dark);
  background-color: var(--white-color);
  border-color: #86b7fe;
  outline: 0;
  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.form-label {
  margin-bottom: 0.5rem;
  font-weight: 500;
}

/* 按钮样式 */
.btn {
  display: inline-block;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-dark);
  text-align: center;
  text-decoration: none;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  background-color: transparent;
  border: 1px solid transparent;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  border-radius: 0.375rem;
  transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.btn:hover {
  color: var(--text-dark);
}

.btn:focus {
  outline: 0;
  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.btn-primary {
  color: var(--white-color);
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-primary:hover {
  color: var(--white-color);
  background-color: #0b5ed7;
  border-color: #0a58ca;
}

.btn-primary:focus {
  color: var(--white-color);
  background-color: #0b5ed7;
  border-color: #0a58ca;
  box-shadow: 0 0 0 0.25rem rgba(49, 132, 253, 0.5);
}

.btn-secondary {
  color: var(--white-color);
  background-color: var(--secondary-color);
  border-color: var(--secondary-color);
}

.btn-secondary:hover {
  color: var(--white-color);
  background-color: #5c636a;
  border-color: #565e64;
}

.btn-success {
  color: var(--white-color);
  background-color: var(--success-color);
  border-color: var(--success-color);
}

.btn-success:hover {
  color: var(--white-color);
  background-color: #157347;
  border-color: #146c43;
}

.btn-danger {
  color: var(--white-color);
  background-color: var(--danger-color);
  border-color: var(--danger-color);
}

.btn-danger:hover {
  color: var(--white-color);
  background-color: #bb2d3b;
  border-color: #b02a37;
}

/* 警告框 */
.alert {
  position: relative;
  padding: 1rem 1rem;
  margin-bottom: 1rem;
  border: 1px solid transparent;
  border-radius: 0.375rem;
}

.alert-info {
  color: #055160;
  background-color: #cff4fc;
  border-color: #b6effb;
}

/* 表格 */
.table {
  width: 100%;
  margin-bottom: 1rem;
  color: var(--text-dark);
  vertical-align: top;
  border-color: var(--border-color);
}

.table th,
.table td {
  padding: 0.75rem;
  vertical-align: top;
  border-top: 1px solid var(--border-color);
}

.table thead th {
  vertical-align: bottom;
  border-bottom: 2px solid var(--border-color);
}

.table tbody + tbody {
  border-top: 2px solid var(--border-color);
}

/* 模态框 */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1055;
  display: none;
  width: 100%;
  height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  outline: 0;
}

.modal-dialog {
  position: relative;
  width: auto;
  margin: 0.5rem;
  pointer-events: none;
}

.modal-content {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  pointer-events: auto;
  background-color: var(--content-bg);
  background-clip: padding-box;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 0.3rem;
  outline: 0;
}

.modal-header {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1rem;
  border-bottom: 1px solid var(--border-color);
  border-top-left-radius: calc(0.3rem - 1px);
  border-top-right-radius: calc(0.3rem - 1px);
}

.modal-title {
  margin-bottom: 0;
  line-height: 1.5;
}

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

.modal-footer {
  display: flex;
  flex-wrap: wrap;
  flex-shrink: 0;
  align-items: center;
  justify-content: flex-end;
  padding: 0.75rem;
  border-top: 1px solid var(--border-color);
  border-bottom-right-radius: calc(0.3rem - 1px);
  border-bottom-left-radius: calc(0.3rem - 1px);
}

/* 响应式工具类 */
@media (min-width: 576px) {
  .modal-dialog {
    max-width: 500px;
    margin: 1.75rem auto;
  }
}

/* 工具类 */
.mb-4 {
  margin-bottom: 1.5rem !important;
}

.mt-4 {
  margin-top: 1.5rem !important;
}

.mb-3 {
  margin-bottom: 1rem !important;
}

.ml-sm-auto {
  margin-left: auto !important;
}

.px-4 {
  padding-left: 1.5rem !important;
  padding-right: 1.5rem !important;
}

/* 标题 */
h1 {
  font-size: 2.5rem;
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

h2 {
  font-size: 2rem;
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

h3 {
  font-size: 1.75rem;
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

h4 {
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

h5 {
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

h6 {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}