/* Bootstrap 5.1.3 核心样式 + 自定义样式 */
:root {
  --bs-blue: #0d6efd;
  --bs-indigo: #6610f2;
  --bs-purple: #6f42c1;
  --bs-pink: #d63384;
  --bs-red: #dc3545;
  --bs-orange: #fd7e14;
  --bs-yellow: #ffc107;
  --bs-green: #198754;
  --bs-teal: #20c997;
  --bs-cyan: #0dcaf0;
  --bs-white: #fff;
  --bs-gray: #6c757d;
  --bs-gray-dark: #343a40;
  --bs-primary: #0d6efd;
  --bs-secondary: #6c757d;
  --bs-success: #198754;
  --bs-info: #0dcaf0;
  --bs-warning: #ffc107;
  --bs-danger: #dc3545;
  --bs-light: #f8f9fa;
  --bs-dark: #212529;
  --bs-primary-rgb: 13, 110, 253;
  --bs-secondary-rgb: 108, 117, 125;
  --bs-success-rgb: 25, 135, 84;
  --bs-info-rgb: 13, 202, 240;
  --bs-warning-rgb: 255, 193, 7;
  --bs-danger-rgb: 220, 53, 69;
  --bs-light-rgb: 248, 249, 250;
  --bs-dark-rgb: 33, 37, 41;
  --bs-white-rgb: 255, 255, 255;
  --bs-black-rgb: 0, 0, 0;
  --bs-body-color-rgb: 33, 37, 41;
  --bs-body-bg-rgb: 255, 255, 255;
  --bs-font-sans-serif: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --bs-font-monospace: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --bs-gradient: linear-gradient(180deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0));
  --bs-body-font-family: var(--bs-font-sans-serif);
  --bs-body-font-size: 1rem;
  --bs-body-font-weight: 400;
  --bs-body-line-height: 1.5;
  --bs-body-color: #212529;
  --bs-body-bg: #fff;
  --bs-border-width: 1px;
  --bs-border-style: solid;
  --bs-border-color: #dee2e6;
  --bs-border-color-translucent: rgba(0, 0, 0, 0.175);
  --bs-border-radius: 0.375rem;
  --bs-border-radius-sm: 0.25rem;
  --bs-border-radius-lg: 0.5rem;
  --bs-border-radius-xl: 1rem;
  --bs-border-radius-2xl: 1.5rem;
  --bs-border-radius-pill: 50rem;
  --bs-box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  --bs-box-shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --bs-box-shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
  --bs-box-shadow-inset: inset 0 1px 2px rgba(0, 0, 0, 0.075);
  --bs-focus-ring-width: 0.25rem;
  --bs-focus-ring-opacity: 0.25;
  --bs-focus-ring-color: rgba(13, 110, 253, 0.25);
  --bs-form-valid-color: #198754;
  --bs-form-valid-border-color: #198754;
  --bs-form-invalid-color: #dc3545;
  --bs-form-invalid-border-color: #dc3545;
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--bs-body-font-family);
  font-size: var(--bs-body-font-size);
  font-weight: var(--bs-body-font-weight);
  line-height: var(--bs-body-line-height);
  color: var(--bs-body-color);
  background-color: var(--bs-body-bg);
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

/* 导航栏样式 */
.navbar {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

.navbar-brand {
  padding-top: 0.3125rem;
  padding-bottom: 0.3125rem;
  margin-right: 1rem;
  font-size: 1.25rem;
  color: rgba(0, 0, 0, 0.9);
  text-decoration: none;
  white-space: nowrap;
}

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

.nav-link {
  display: block;
  padding: 0.5rem 1rem;
  color: rgba(0, 0, 0, 0.55);
  text-decoration: none;
  transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out;
}

.nav-link:hover, .nav-link:focus {
  color: rgba(0, 0, 0, 0.7);
}

.navbar-expand-lg .navbar-nav {
  flex-direction: row;
}

.navbar-expand-lg .navbar-nav .nav-link {
  padding-right: 0.5rem;
  padding-left: 0.5rem;
}

.navbar-expand-lg .navbar-nav .dropdown-menu {
  position: absolute;
}

.dropdown-menu {
  position: absolute;
  z-index: 1000;
  display: none;
  min-width: 10rem;
  padding: 0.5rem 0;
  margin: 0;
  font-size: 1rem;
  color: #212529;
  text-align: left;
  list-style: none;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-radius: 0.375rem;
}

.dropdown-menu.show {
  display: block;
}

.dropdown-item {
  display: block;
  width: 100%;
  padding: 0.25rem 1rem;
  clear: both;
  font-weight: 400;
  color: #212529;
  text-align: inherit;
  text-decoration: none;
  white-space: nowrap;
  background-color: transparent;
  border: 0;
}

.dropdown-item:hover, .dropdown-item:focus {
  color: #1e2125;
  background-color: #e9ecef;
}

/* 容器样式 */
.container {
  width: 100%;
  padding-right: 0.75rem;
  padding-left: 0.75rem;
  margin-right: auto;
  margin-left: auto;
}

@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
}

@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }
}

/* 行和列样式 */
.row {
  --bs-gutter-x: 1.5rem;
  --bs-gutter-y: 0;
  display: flex;
  flex-wrap: wrap;
  margin-top: calc(-1 * var(--bs-gutter-y));
  margin-right: calc(-0.5 * var(--bs-gutter-x));
  margin-left: calc(-0.5 * var(--bs-gutter-x));
}

.row > * {
  flex-shrink: 0;
  width: 100%;
  max-width: 100%;
  padding-right: calc(var(--bs-gutter-x) * 0.5);
  padding-left: calc(var(--bs-gutter-x) * 0.5);
  margin-top: var(--bs-gutter-y);
}

.col-md-4 {
  flex: 0 0 auto;
  width: 33.33333333%;
}

.col-md-6 {
  flex: 0 0 auto;
  width: 50%;
}

@media (min-width: 768px) {
  .col-md-4 {
    flex: 0 0 auto;
    width: 33.33333333%;
  }
  .col-md-6 {
    flex: 0 0 auto;
    width: 50%;
  }
}

/* 卡片样式 */
.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, 0.125);
  border-radius: 0.375rem;
}

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

.card-header {
  padding: 0.5rem 1rem;
  margin-bottom: 0;
  background-color: rgba(0, 0, 0, 0.03);
  border-bottom: 1px solid rgba(0, 0, 0, 0.125);
}

.card-header:first-child {
  border-radius: calc(0.375rem - 1px) calc(0.375rem - 1px) 0 0;
}

/* 按钮样式 */
.btn {
  display: inline-block;
  font-weight: 400;
  line-height: 1.5;
  color: #212529;
  text-align: center;
  text-decoration: none;
  vertical-align: middle;
  cursor: pointer;
  -webkit-user-select: none;
  -moz-user-select: none;
  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: #212529;
}

.btn-primary {
  color: #fff;
  background-color: #0d6efd;
  border-color: #0d6efd;
}

.btn-primary:hover {
  color: #fff;
  background-color: #0b5ed7;
  border-color: #0a58ca;
}

.btn-secondary {
  color: #fff;
  background-color: #6c757d;
  border-color: #6c757d;
}

.btn-secondary:hover {
  color: #fff;
  background-color: #5c636a;
  border-color: #565e64;
}

.btn-success {
  color: #fff;
  background-color: #198754;
  border-color: #198754;
}

.btn-success:hover {
  color: #fff;
  background-color: #157347;
  border-color: #146c43;
}

.btn-danger {
  color: #fff;
  background-color: #dc3545;
  border-color: #dc3545;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bb2d3b;
  border-color: #b02a37;
}

.btn-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.875rem;
  border-radius: 0.25rem;
}

/* 表单样式 */
.form-control {
  display: block;
  width: 100%;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: #212529;
  background-color: #fff;
  background-image: none;
  border: 1px solid #ced4da;
  border-radius: 0.375rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
  color: #212529;
  background-color: #fff;
  border-color: #86b7fe;
  outline: 0;
  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

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

/* 表格样式 */
.table {
  --bs-table-bg: transparent;
  --bs-table-accent-bg: transparent;
  --bs-table-striped-color: #212529;
  --bs-table-striped-bg: rgba(0, 0, 0, 0.05);
  --bs-table-active-color: #212529;
  --bs-table-active-bg: rgba(0, 0, 0, 0.1);
  --bs-table-hover-color: #212529;
  --bs-table-hover-bg: rgba(0, 0, 0, 0.075);
  width: 100%;
  margin-bottom: 1rem;
  color: #212529;
  vertical-align: top;
  border-color: #dee2e6;
}

.table > :not(caption) > * > * {
  padding: 0.5rem 0.5rem;
  background-color: var(--bs-table-bg);
  border-bottom-width: 1px;
}

.table > tbody {
  vertical-align: inherit;
}

.table > thead {
  vertical-align: bottom;
}

.table-hover > tbody > tr:hover > * {
  --bs-table-accent-bg: var(--bs-table-hover-bg);
  color: var(--bs-table-hover-color);
}

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* 徽章样式 */
.badge {
  display: inline-block;
  padding: 0.35em 0.65em;
  font-size: 0.75em;
  font-weight: 700;
  line-height: 1;
  color: #fff;
  text-align: center;
  white-space: nowrap;
  vertical-align: baseline;
  border-radius: 0.375rem;
}

.bg-success {
  background-color: #198754 !important;
}

.bg-secondary {
  background-color: #6c757d !important;
}

/* 警告框样式 */
.alert {
  position: relative;
  padding: 0.75rem 1.25rem;
  margin-bottom: 1rem;
  border: 1px solid transparent;
  border-radius: 0.375rem;
}

.alert-danger {
  color: #721c24;
  background-color: #f8d7da;
  border-color: #f5c2c7;
}

.alert-success {
  color: #0f5132;
  background-color: #d1e7dd;
  border-color: #badbcc;
}

.alert-dismissible {
  padding-right: 3rem;
}

.alert-dismissible .btn-close {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 2;
  padding: 1.25rem 1rem;
}

.btn-close {
  box-sizing: content-box;
  width: 1em;
  height: 1em;
  padding: 0.25em 0.25em;
  color: #000;
  background: transparent url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23000'%3e%3cpath d='m.5.5 15 15M15.5.5l-15 15'/%3e%3c/svg%3e") center/1em auto no-repeat;
  border: 0;
  border-radius: 0.375rem;
  opacity: 0.5;
}

.btn-close:hover {
  color: #000;
  text-decoration: none;
  opacity: 0.75;
}

/* 模态框样式 */
.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: #fff;
  background-clip: padding-box;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 0.5rem;
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  outline: 0;
}

.modal-header {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1rem;
  border-bottom: 1px solid #dee2e6;
  border-top-left-radius: calc(0.5rem - 1px);
  border-top-right-radius: calc(0.5rem - 1px);
}

.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 #dee2e6;
  border-bottom-right-radius: calc(0.5rem - 1px);
  border-bottom-left-radius: calc(0.5rem - 1px);
}

.modal.show {
  display: block;
}

/* 输入组样式 */
.input-group {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  width: 100%;
}

.input-group > .form-control {
  position: relative;
  flex: 1 1 auto;
  width: 1%;
  min-width: 0;
}

.input-group-text {
  display: flex;
  align-items: center;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: #212529;
  text-align: center;
  white-space: nowrap;
  background-color: #e9ecef;
  border: 1px solid #ced4da;
}

.input-group:not(.has-validation) > :not(:last-child):not(.dropdown-toggle):not(.dropdown-menu),
.input-group:not(.has-validation) > .dropdown-toggle:nth-last-child(n+3) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.input-group > :not(:first-child):not(.dropdown-menu):not(.valid-tooltip):not(.valid-feedback):not(.invalid-tooltip):not(.invalid-feedback) {
  margin-left: -1px;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}

/* 工具类 */
.d-flex {
  display: flex !important;
}

.justify-content-center {
  justify-content: center !important;
}

.align-items-center {
  align-items: center !important;
}

.text-center {
  text-align: center !important;
}

.text-muted {
  color: #6c757d !important;
}

.mb-0 {
  margin-bottom: 0 !important;
}

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

.mb-4 {
  margin-bottom: 1.5rem !important;
}

.mt-3 {
  margin-top: 1rem !important;
}

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

.ms-auto {
  margin-left: auto !important;
}

.me-auto {
  margin-right: auto !important;
}

/* 自定义样式 */
body {
  background-color: #f8f9fa;
}

.navbar {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-brand {
  font-weight: 700;
  color: white !important;
}

.nav-link {
  color: rgba(255,255,255,0.9) !important;
}

.nav-link:hover {
  color: white !important;
}

.card {
  border: none;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.card-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border-radius: 15px 15px 0 0 !important;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border: none;
  border-radius: 10px;
  padding: 0.5rem 1.5rem;
  font-weight: 600;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-success {
  background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
  border: none;
  border-radius: 10px;
}

.btn-danger {
  background: linear-gradient(135deg, #dc3545 0%, #fd7e14 100%);
  border: none;
  border-radius: 10px;
}

.table {
  border-radius: 10px;
  overflow: hidden;
}

.table thead th {
  background-color: #f8f9fa;
  border: none;
  font-weight: 600;
  color: #495057;
}

.table tbody tr {
  transition: all 0.3s ease;
}

.table tbody tr:hover {
  background-color: #f8f9fa;
}

.badge {
  border-radius: 20px;
  padding: 0.5rem 1rem;
}

.modal-content {
  border-radius: 15px;
  border: none;
}

.modal-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border-radius: 15px 15px 0 0;
}

.form-control {
  border-radius: 10px;
  border: 2px solid #e9ecef;
}

.form-control:focus {
  border-color: #667eea;
  box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.stats-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.stats-card .card-body {
  padding: 2rem;
}

.stats-number {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

/* 登录页面特殊样式 */
.login-page {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  padding: 2rem;
  width: 100%;
  max-width: 400px;
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-header h1 {
  color: #333;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.login-header p {
  color: #666;
  margin: 0;
}

.btn-login {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border: none;
  border-radius: 10px;
  padding: 0.75rem 2rem;
  font-weight: 600;
  font-size: 1rem;
  width: 100%;
  transition: all 0.3s ease;
}

.btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.input-group-text {
  background: transparent;
  border: 2px solid #e9ecef;
  border-right: none;
  border-radius: 10px 0 0 10px;
}

.input-group .form-control {
  border-left: none;
  border-radius: 0 10px 10px 0;
}

.alert {
  border-radius: 10px;
  border: none;
}

/* Bootstrap Icons 内联样式 */
.bi {
  display: inline-block;
  width: 1em;
  height: 1em;
  vertical-align: -0.125em;
  fill: currentcolor;
}

.bi-shield-lock::before {
  content: "🛡️";
}

.bi-person::before {
  content: "👤";
}

.bi-lock::before {
  content: "🔒";
}

.bi-box-arrow-in-right::before {
  content: "➡️";
}

.bi-person-check::before {
  content: "✅";
}

.bi-globe::before {
  content: "🌐";
}

.bi-check-circle::before {
  content: "✅";
}

.bi-plus-circle::before {
  content: "➕";
}

.bi-arrow-clockwise::before {
  content: "🔄";
}

.bi-eye::before {
  content: "👁️";
}

.bi-person-plus::before {
  content: "👤➕";
}

.bi-box-arrow-right::before {
  content: "➡️";
}

.bi-exclamation-triangle::before {
  content: "⚠️";
}

/* 响应式设计 */
@media (max-width: 768px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  
  .card-body {
    padding: 1rem;
  }
  
  .stats-card .card-body {
    padding: 1.5rem;
  }
  
  .stats-number {
    font-size: 2rem;
  }
  
  .login-card {
    margin: 1rem;
    padding: 1.5rem;
  }
}