/* ===== 管理后台样式 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #1890FF;
  --primary-hover: #40A9FF;
  --primary-dark: #096DD9;
  --sidebar-bg: #001529;
  --sidebar-text: rgba(255,255,255,0.65);
  --sidebar-active: #1890FF;
  --bg: #F0F2F5;
  --card-bg: #fff;
  --text: #333;
  --text-secondary: #666;
  --text-light: #999;
  --border: #E8E8E8;
  --success: #52C41A;
  --warning: #FAAD14;
  --danger: #FF4D4F;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

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

.login-card {
  background: #fff;
  border-radius: 12px;
  padding: 40px;
  width: 400px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.login-card h1 {
  text-align: center;
  font-size: 24px;
  margin-bottom: 8px;
  color: var(--text);
}

.login-card .login-subtitle {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 30px;
  font-size: 14px;
}

.login-card .form-group {
  margin-bottom: 20px;
}

.login-card .form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
}

.login-card .form-group input {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.login-card .form-group input:focus {
  border-color: var(--primary);
}

.login-card .login-btn {
  width: 100%;
  height: 44px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 8px;
}

.login-card .login-btn:hover {
  background: var(--primary-hover);
}

.login-card .login-btn:active {
  background: var(--primary-dark);
}

/* ===== 后台布局 ===== */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

/* 侧边栏 */
.admin-sidebar {
  width: 220px;
  background: var(--sidebar-bg);
  color: #fff;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
}

.admin-sidebar .sidebar-header {
  padding: 20px;
  font-size: 18px;
  font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  color: #fff;
}

.admin-sidebar .sidebar-nav {
  flex: 1;
  padding: 12px 0;
  overflow-y: auto;
}

.admin-sidebar .sidebar-nav a {
  display: flex;
  align-items: center;
  padding: 12px 24px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.2s;
  gap: 10px;
  border-left: 3px solid transparent;
}

.admin-sidebar .sidebar-nav a:hover {
  color: #fff;
  background: rgba(255,255,255,0.05);
}

.admin-sidebar .sidebar-nav a.active {
  color: #fff;
  background: rgba(24,144,255,0.15);
  border-left-color: var(--sidebar-active);
}

/* 主内容区 */
.admin-main {
  flex: 1;
  margin-left: 220px;
  padding: 24px;
  min-height: 100vh;
}

.admin-main .page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.admin-main .page-header h2 {
  font-size: 22px;
  font-weight: 600;
}

/* 统计卡片 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.stat-card .stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.stat-card .stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
}

.stat-card .stat-value.gold {
  color: #FAAD14;
}

.stat-card .stat-value.blue {
  color: var(--primary);
}

.stat-card .stat-value.green {
  color: var(--success);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 20px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  gap: 6px;
  text-decoration: none;
  font-family: inherit;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
}

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

.btn-danger:hover {
  background: #FFF1F0;
}

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

.btn-default:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-success {
  background: var(--success);
  color: #fff;
}

.btn-success:hover {
  background: #73D13D;
}

/* 表格 */
.data-table {
  width: 100%;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.data-table table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  background: #FAFAFA;
  padding: 12px 16px;
  text-align: left;
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 13px;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background: #FAFAFA;
}

.data-table .thumb-cell {
  width: 60px;
  height: 40px;
  border-radius: 4px;
  overflow: hidden;
  background: #e0e0e0;
  display: inline-block;
}

.data-table .thumb-cell img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.data-table .status-tag {
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 4px;
  font-weight: 500;
}

.data-table .status-tag.active {
  background: #F6FFED;
  color: #52C41A;
  border: 1px solid #B7EB8F;
}

.data-table .status-tag.ended {
  background: #FFF7E6;
  color: #FA8C16;
  border: 1px solid #FFD591;
}

.data-table .action-btns {
  display: flex;
  gap: 8px;
}

.data-table .action-btns .btn {
  padding: 4px 12px;
  font-size: 12px;
}

/* 筛选栏 */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  background: #fff;
  padding: 12px 16px;
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.filter-bar select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  outline: none;
  background: #fff;
  min-width: 180px;
}

.filter-bar select:focus {
  border-color: var(--primary);
}

/* 表单（后台） */
.form-card {
  background: #fff;
  border-radius: 8px;
  padding: 30px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  max-width: 700px;
}

.form-card .form-group {
  margin-bottom: 20px;
}

.form-card .form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
}

.form-card .form-group input,
.form-card .form-group textarea,
.form-card .form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
  font-family: inherit;
}

.form-card .form-group input:focus,
.form-card .form-group textarea:focus {
  border-color: var(--primary);
}

.form-card .form-group textarea {
  min-height: 100px;
  resize: vertical;
}

.form-card .form-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

/* 上传占位 */
.upload-placeholder {
  width: 200px;
  height: 120px;
  border: 2px dashed var(--border);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  background: #FAFAFA;
}

.upload-placeholder:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.upload-placeholder .upload-icon {
  font-size: 28px;
  margin-bottom: 4px;
}

/* 档位设置 */
.tier-setting {
  display: flex;
  gap: 12px;
  margin-bottom: 10px;
  align-items: flex-start;
}

.tier-setting .tier-amount-input {
  width: 140px;
  flex-shrink: 0;
}

.tier-setting .tier-desc-input {
  flex: 1;
}

.tier-setting .remove-btn {
  padding: 8px 12px;
  background: none;
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: 6px;
  cursor: pointer;
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}

.tier-setting .remove-btn:hover {
  background: #FFF1F0;
}

/* 系统设置 */
.settings-card {
  background: #fff;
  border-radius: 8px;
  padding: 24px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  max-width: 600px;
}

.settings-card .setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.settings-card .setting-item:last-child {
  border-bottom: none;
}

.settings-card .setting-item .setting-label {
  font-size: 15px;
  white-space: pre-line;
  text-align: center;
  font-weight: 500;
}

.settings-card .setting-item .setting-desc {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 2px;
}

.settings-card .setting-item .setting-status {
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 12px;
  background: #F5F5F5;
  color: var(--text-light);
}

/* Toast */
.toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0,0,0,0.75);
  color: #fff;
  padding: 16px 28px;
  border-radius: 10px;
  font-size: 15px;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
}

/* ===== 轮播图管理 ===== */
.banner-section {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.banner-section h3 {
  font-size: 16px;
  margin-bottom: 16px;
  color: var(--text);
}

.banner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.banner-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: #fafafa;
}

.banner-item .banner-preview {
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #999;
  position: relative;
}

.banner-item .banner-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 轮播图预览列表（已上传的图片展示） */
.banner-preview-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
  min-height: 40px;
}

.banner-preview-item {
  position: relative;
  width: 160px;
  height: 90px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.banner-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.banner-del-btn {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,0.55);
  color: #fff;
  font-size: 13px;
  line-height: 22px;
  text-align: center;
  cursor: pointer;
  transition: background 0.2s;
}

.banner-del-btn:hover {
  background: red;
}

.banner-item .banner-info {
  padding: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

.banner-item .banner-info .banner-name {
  font-weight: 500;
  color: var(--text);
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.banner-item .banner-info .upload-btn {
  padding: 4px 10px;
  font-size: 12px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.banner-item .banner-info .upload-btn:hover {
  background: var(--primary-hover);
}

/* ===== 上传网格 ===== */
.upload-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
  margin-top: 8px;
}

.upload-grid .upload-card {
  border: 2px dashed var(--border);
  border-radius: 8px;
  height: 90px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.2s;
  font-size: 12px;
  color: var(--text-light);
  position: relative;
  overflow: hidden;
}

.upload-grid .upload-card:hover {
  border-color: var(--primary);
}

.upload-grid .upload-card.has-image {
  border-style: solid;
  border-color: var(--success);
}

.upload-grid .upload-card .preview-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
}

.upload-grid .upload-card .remove-upload {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(0,0,0,0.5);
  color: #fff;
  border: none;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.upload-card .upload-icon {
  font-size: 24px;
  margin-bottom: 4px;
}