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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f5f7fa;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* 导航栏 */
.navbar {
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  padding: 0 20px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 20px;
  font-weight: bold;
  color: #1677ff;
}

.nav-links a {
  margin-left: 20px;
  color: #666;
  text-decoration: none;
}

.nav-links a:hover {
  color: #1677ff;
}

/* 卡片 */
.card {
  background: #fff;
  border-radius: 8px;
  padding: 24px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  margin-bottom: 20px;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid #eee;
}

/* 表单 */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  color: #333;
}

.form-input {
  width: 100%;
  height: 40px;
  padding: 0 12px;
  border: 1px solid #d9d9d9;
  border-radius: 6px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.3s;
}

.form-input:focus {
  border-color: #1677ff;
}

.form-textarea {
  width: 100%;
  min-height: 100px;
  padding: 12px;
  border: 1px solid #d9d9d9;
  border-radius: 6px;
  font-size: 14px;
  outline: none;
  resize: vertical;
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 0 20px;
  height: 40px;
  line-height: 40px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: all 0.3s;
}

.btn-primary {
  background: #1677ff;
  color: #fff;
}

.btn-primary:hover {
  background: #4096ff;
}

.btn-success {
  background: #52c41a;
  color: #fff;
}

.btn-default {
  background: #fff;
  color: #333;
  border: 1px solid #d9d9d9;
}

.btn-default:hover {
  border-color: #1677ff;
  color: #1677ff;
}

/* 表格 */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #f0f0f0;
  font-size: 14px;
}

.table th {
  background: #fafafa;
  font-weight: 600;
  color: #333;
}

.table tr:hover {
  background: #fafafa;
}

/* 状态标签 */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
}

.tag-success {
  background: #f6ffed;
  color: #52c41a;
  border: 1px solid #b7eb8f;
}

.tag-warning {
  background: #fffbe6;
  color: #faad14;
  border: 1px solid #ffe58f;
}

.tag-primary {
  background: #e6f4ff;
  color: #1677ff;
  border: 1px solid #91caff;
}

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

.auth-card {
  width: 400px;
  background: #fff;
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.auth-title {
  text-align: center;
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 30px;
  color: #333;
}

.auth-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: #666;
}

.auth-footer a {
  color: #1677ff;
  text-decoration: none;
}

/* 侧边栏布局（后台用） */
.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 200px;
  background: #001529;
  color: #fff;
  padding: 20px 0;
}

.sidebar-menu {
  list-style: none;
}

.sidebar-menu li a {
  display: block;
  padding: 12px 24px;
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  transition: all 0.3s;
}

.sidebar-menu li a:hover,
.sidebar-menu li a.active {
  background: #1677ff;
  color: #fff;
}

.main-content {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
}

/* 提示信息 */
.alert {
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 14px;
}

.alert-success {
  background: #f6ffed;
  color: #52c41a;
  border: 1px solid #b7eb8f;
}

.alert-error {
  background: #fff2f0;
  color: #ff4d4f;
  border: 1px solid #ffccc7;
}