:root {
  /* 简约大方企业级后台配色 (类 Ant Design / Element) */
  --primary-color: #1890ff;
  --primary-hover: #40a9ff;
  --primary-light: #e6f7ff;
  
  --success-color: #52c41a;
  --danger-color: #f5222d;
  --warning-color: #faad14;
  
  --bg-color: #f0f2f5;
  --sidebar-bg: #001529;
  --sidebar-text: rgba(255, 255, 255, 0.65);
  --sidebar-text-active: #ffffff;
  
  --card-bg: #ffffff;
  --card-border: #f0f0f0;
  
  --text-main: #000000d9;
  --text-muted: #00000073;
  --border-color: #d9d9d9;

  /* 预警色系 (实色) */
  --alert-7day: #faad14;    
  --alert-30day: #fa541c;   
  --alert-90day: #f5222d;   
  --alert-180day: #8c8c8c;  

  /* 小阴影和小圆角 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
  
  --radius-md: 4px;
  --radius-sm: 2px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  font-size: 14px;
}

/* ================= 登录页 ================= */
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: var(--bg-color);
}

.login-card {
  background: var(--card-bg);
  padding: 40px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--card-border);
  width: 100%;
  max-width: 380px;
}

.login-card h2 {
  font-weight: 500;
  margin-bottom: 24px;
  color: var(--text-main);
  font-size: 22px;
  text-align: center;
}

.login-card .btn-primary {
  width: 100%;
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--text-main);
}

.form-input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px;
  outline: none;
  background: #fff;
  transition: all 0.3s;
}

.form-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-weight: 400;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s;
  border: 1px solid transparent;
  outline: none;
}

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

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

.btn-sm {
  padding: 4px 12px;
  font-size: 12px;
}

.btn-outline {
  background: #fff;
  border: 1px solid var(--border-color);
  color: var(--text-main);
}
.btn-outline:hover {
  color: var(--primary-color);
  border-color: var(--primary-color);
}
.btn-danger {
  background: #fff;
  border: 1px solid var(--danger-color);
  color: var(--danger-color);
}
.btn-danger:hover {
  background: var(--danger-color);
  color: #fff;
}
.btn-success {
  background: var(--success-color);
  border-color: var(--success-color);
  color: #fff;
}
.btn-success:hover {
  background: #73d13d;
  border-color: #73d13d;
}

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

.sidebar {
  width: 220px;
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
}

.logo {
  padding: 16px 24px;
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  background: #002140;
}

.sidebar-user {
  padding: 16px 24px;
  color: #fff;
  background: #001529;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.pc-only { display: block; }
.mobile-header { display: none; }

.nav-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  margin: 12px 0;
}

.nav-menu {
  list-style: none;
  flex: 1;
  padding-top: 8px;
}

.nav-item {
  padding: 12px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--sidebar-text);
  transition: all 0.2s;
}

.nav-item:hover {
  color: var(--sidebar-text-active);
}

.nav-item.active {
  background: var(--primary-color);
  color: #fff;
}

.main-content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
  height: 100vh;
}

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

.page-title {
  font-size: 20px;
  font-weight: 500;
  color: var(--text-main);
}

/* ================= 卡片与表格 ================= */
.view-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  padding: 24px;
  min-height: calc(100vh - 48px);
}

.filters {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

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

.data-table th {
  padding: 12px 16px;
  background: #fafafa;
  color: var(--text-main);
  font-weight: 500;
  border-bottom: 1px solid var(--card-border);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--card-border);
  color: var(--text-main);
}

.data-table tbody tr:hover {
  background: #fafafa;
}

/* 标签样式 */
.badge {
  padding: 2px 8px;
  border-radius: 2px;
  font-size: 12px;
  border: 1px solid transparent;
  display: inline-block;
}

.badge-default { background: #fafafa; border-color: #d9d9d9; color: #000000d9; }
.badge-primary { background: #e6f7ff; border-color: #91d5ff; color: #1890ff; }
.badge-alert-1 { background: #fffbe6; border-color: #ffe58f; color: #faad14; }
.badge-alert-2 { background: #fff2e8; border-color: #ffbb96; color: #fa541c; }
.badge-alert-3 { background: #fff1f0; border-color: #ffa39e; color: #f5222d; }
.badge-alert-4 { background: #fafafa; border-color: #d9d9d9; color: #00000073; }

/* ================= 移动端卡片视图 ================= */
.mobile-card-grid {
  display: none;
}

/* ================= 模态框 Modal ================= */
.modal-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-backdrop.show {
  display: flex;
}

.modal-content {
  background: #fff;
  border-radius: var(--radius-md);
  width: 90%;
  max-width: 520px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-weight: 500;
  font-size: 16px;
  color: var(--text-main);
}

.modal-close {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--text-muted);
}

.modal-close:hover {
  color: var(--text-main);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
}

.modal-footer {
  padding: 12px 24px;
  border-top: 1px solid var(--card-border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.modal-footer .btn {
  min-width: 80px;
}

textarea.form-input {
  resize: vertical;
  min-height: 80px;
}

/* 报表统计卡片 */
.stat-cards {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
}

.stat-card {
  flex: 1;
  background: #fff;
  border: 1px solid var(--card-border);
  padding: 24px;
  border-radius: var(--radius-md);
}

.stat-title {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.stat-value {
  font-size: 30px;
  color: var(--text-main);
}

.section-title {
  font-size: 16px;
  font-weight: 500;
  margin: 24px 0 16px;
}

/* 响应式适配 */
@media (max-width: 768px) {
  .pc-only { display: none; }
  
  .mobile-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--sidebar-bg);
    color: #fff;
    padding: 12px 16px;
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
  }
  
  .mobile-logo { font-size: 16px; font-weight: 600; }
  .mobile-menu-btn { background: none; border: none; color: #fff; font-size: 20px; cursor: pointer; padding: 4px; }
  
  .layout {
    flex-direction: column;
    padding-top: 52px;
  }
  
  .sidebar {
    position: fixed;
    top: 52px;
    left: -100%;
    bottom: 0;
    width: 240px;
    height: calc(100vh - 52px);
    z-index: 99;
    transition: left 0.3s ease;
    box-shadow: 4px 0 16px rgba(0,0,0,0.15);
  }
  
  .sidebar.sidebar-open {
    left: 0;
  }
  
  .nav-menu {
    display: block;
    overflow-x: hidden;
    padding: 8px 0;
  }
  
  .nav-item {
    padding: 12px 24px;
    white-space: normal;
  }
  
  .main-content {
    padding: 12px;
  }
  
  .view-card {
    min-height: auto;
    padding: 16px;
  }
  
  .table-responsive {
    display: none;
  }
  
  .mobile-card-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: 1fr;
  }
  
  .mobile-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
  }
  
  .m-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    border-bottom: 1px solid #f0f0f0;
    padding-bottom: 12px;
  }
  
  .m-name { font-weight: 500; font-size: 16px; }
  .m-phone { color: var(--primary-color); font-size: 14px; margin-top: 4px; display: block; text-decoration: none; }
  
  .m-card-body {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
  }
  
  .m-card-body p { margin-bottom: 6px; }
  
  .m-card-footer {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
  }
  
  .m-card-footer .btn {
    flex: 1;
    text-align: center;
    min-width: 80px;
  }

  .stat-cards {
    flex-direction: column;
    gap: 12px;
  }
}