:root {
  --primary-brown: #8B4513;
  --primary-brown-light: #A0522D;
  --primary-gold: #C9A96E;
  --primary-gold-light: #D4B87F;
  --text-primary: #2C2C2C;
  --text-secondary: #5C5C5C;
  --text-tertiary: #9B9B9B;
  --bg-page: #FAF7F2;
  --bg-white: #FFFFFF;
  --bg-warm: #FDFAF5;
  --border-light: #EDE6DC;
  --border-color: #E8E2D6;
  --header-height: 70px;
  --max-width: 1200px;
  --success-color: #5D875C;
  --warning-color: #C9A96E;
  --danger-color: #B35D5D;
  --info-color: #6B8E9B;
  --shadow-sm: 0 2px 8px rgba(139, 69, 19, 0.06);
  --shadow-md: 0 4px 16px rgba(139, 69, 19, 0.08);
  --shadow-lg: 0 8px 24px rgba(139, 69, 19, 0.1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--primary-brown);
}

img {
  max-width: 100%;
  vertical-align: middle;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
  font-family: inherit;
}

input, textarea {
  outline: none;
  font-family: inherit;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.main-content {
  min-height: calc(100vh - var(--header-height));
  padding-top: var(--header-height);
}

.text-ellipsis {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.text-ellipsis-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-1 {
  flex: 1;
}

.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mb-10 { margin-bottom: 10px; }
.mb-20 { margin-bottom: 20px; }

.card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-brown), var(--primary-brown-light));
  color: #fff;
  border: none;
}

.btn-primary:hover {
  opacity: 0.92;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(139, 69, 19, 0.25);
}

.btn-default {
  background: #fff;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-default:hover {
  color: var(--primary-brown);
  border-color: var(--primary-gold);
  background: var(--bg-warm);
}

.btn-gold {
  background: linear-gradient(135deg, var(--primary-gold), var(--primary-gold-light));
  color: #fff;
  border: none;
}

.btn-gold:hover {
  opacity: 0.92;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(201, 169, 110, 0.3);
}

.btn-danger {
  background: #fff;
  color: #E15A24;
  border: 1px solid #E15A24;
}

.btn-danger:hover {
  background: #E15A24;
  color: #fff;
}

.action-btn.danger {
  background: #fff;
  color: #E15A24;
  border: 1px solid #E15A24;
}

.action-btn.danger:hover {
  background: #E15A24;
  color: #fff;
}

.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  background: var(--bg-warm);
  color: var(--primary-brown);
  border: 1px solid var(--border-light);
}

.tag-success {
  background: #EAF0EA;
  color: var(--success-color);
  border-color: #D4E0D4;
}

.tag-warning {
  background: #F5F0E6;
  color: var(--warning-color);
  border-color: #E8DFC8;
}

.tag-danger {
  background: #F0E8E8;
  color: var(--danger-color);
  border-color: #E0D0D0;
}

.tag-info {
  background: #E6ECEE;
  color: var(--info-color);
  border-color: #D0D9DD;
}

.page-placeholder {
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.placeholder-content {
  text-align: center;
  color: #999;
}

.placeholder-icon {
  font-size: 64px;
  margin-bottom: 20px;
}

.placeholder-content h2 {
  font-size: 24px;
  color: #666;
  margin-bottom: 12px;
}

.placeholder-content p {
  font-size: 14px;
}