/* ========== 全局变量 ========== */
:root {
  --side-bg: #1e2836;
  --side-bg-hover: #263244;
  --side-active: #1e9fff;
  --side-text: #b8c2cf;
  --side-text-active: #ffffff;
  --brand-border: #263244;

  --brand-bg: #1e2836;
  --brand-text: #ffffff;

  --accent: #1e9fff;
  --accent-hover: #168add;
  --accent-light: rgba(30,159,255,.12);

  --main-bg: #f2f3f5;
  --card-bg: #ffffff;
  --card-border: #e6e7eb;
  --text-primary: #1c2438;
  --text-secondary: #666f7c;
  --text-muted: #8c95a1;
  --text-inverse: #ffffff;

  --link-color: #1e9fff;
  --link-hover: #168add;

  --header-bg: #ffffff;
  --header-border: #e6e7eb;
  --header-shadow: 0 1px 2px rgba(0,0,0,.03);

  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 6px;
  --radius-xl: 8px;

  --shadow-card: 0 1px 2px rgba(0,0,0,.04);
  --shadow-modal: 0 4px 24px rgba(0,0,0,.1);

  --success: #16b777;
  --danger: #ff5722;
  --warning: #ffb800;
  --info: #1e9fff;
}

/* ========== 基础 ========== */
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  background: var(--main-bg);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
.muted { color: var(--text-muted); }
.code-text { font-family: "SFMono-Regular", Consolas, "Courier New", monospace; font-size: 13px; }
.success-text { color: var(--success); }
.danger-text { color: var(--danger); }
.form-help { font-size: 12px; color: var(--text-muted); line-height: 1.6; }
.secret-state { color: var(--success); }

/* ========== 侧边栏 ========== */
.admin-side {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 210px;
  background: var(--side-bg);
  z-index: 10;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  -webkit-overflow-scrolling: touch;
}
.admin-side::-webkit-scrollbar { width: 4px; }
.admin-side::-webkit-scrollbar-thumb { background: rgba(255,255,255,.15); border-radius: 2px; }
.admin-side::-webkit-scrollbar-track { background: transparent; }

.admin-brand {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--brand-bg) !important;
  color: var(--brand-text);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--brand-border);
  flex-shrink: 0;
}
.admin-brand .brand-icon {
  width: 26px;
  height: 26px;
  border-radius: 4px;
  background: rgba(255,255,255,.15);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  color: #fff;
}
.admin-nav-wrap { flex: 1; overflow: hidden; }

/* 导航覆盖 Layui 默认样式 */
.layui-nav.layui-nav-tree {
  background: var(--side-bg);
  padding: 8px 0;
}
.layui-nav .layui-nav-item { margin: 1px 8px; }
.layui-nav .layui-nav-item a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  height: auto;
  line-height: 1.4;
  font-size: 14px;
  color: var(--side-text);
  border-radius: var(--radius-md);
  transition: background-color .15s ease, color .15s ease;
}
.layui-nav .layui-nav-item a:hover {
  background: var(--side-bg-hover);
  color: var(--side-text-active);
  background-color: var(--side-bg-hover);
}
.layui-nav .layui-this > a {
  background: var(--accent) !important;
  color: var(--side-text-active) !important;
  border-radius: var(--radius-md);
}
.layui-nav .layui-nav-item a .layui-icon {
  font-size: 18px;
  width: 20px;
  text-align: center;
}
.layui-nav-tree .layui-nav-bar { display: none; }

/* ========== 主区域 ========== */
.admin-main { margin-left: 210px; min-width: 760px; }
.admin-header {
  height: 52px;
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.admin-header strong { font-size: 16px; color: var(--text-primary); font-weight: 600; }
.admin-header .muted { font-size: 13px; color: var(--text-muted); }
.admin-header .layui-btn { margin-left: 12px; }

.admin-content { padding: 18px 24px; }

/* ========== 卡片 ========== */
.admin-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-card);
}
.admin-card h2 {
  margin: 0 0 16px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--card-border);
}

/* ========== 概览页 ========== */
.welcome-box {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  box-shadow: var(--shadow-card);
}
.welcome-box .avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: #fff;
  flex-shrink: 0;
}
.welcome-box .welcome-text h2 {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
}
.welcome-box .welcome-text h2 .username { color: var(--link-color); }
.welcome-box .welcome-text p { margin: 0; font-size: 13px; color: var(--text-secondary); }

.version-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: #fafbfc;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  margin-bottom: 0;
  flex-wrap: wrap;
  font-size: 13px;
}
.version-bar .current-ver { color: var(--text-primary); font-weight: 500; }
.version-bar .spacer { flex: 1; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 16px;
}
.stat-box {
  padding: 18px 20px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}
.stat-box strong {
  display: block;
  font-size: 26px;
  color: var(--accent);
  margin-top: 4px;
  font-weight: 600;
}

.announcement-box h2::before {
  content: "";
  display: inline-block;
  width: 3px;
  height: 14px;
  background: var(--accent);
  border-radius: 2px;
  margin-right: 8px;
  vertical-align: -2px;
}

/* ========== 表格 ========== */
.layui-table { margin-top: 0; }
.layui-table thead tr { background: #f7f8fa !important; }
.layui-table th { font-weight: 600; color: var(--text-primary); font-size: 13px; }
.layui-table td { vertical-align: middle; font-size: 13px; }
.layui-table tbody tr:hover { background: #fafbfc; }

/* ============ 分销管理自定义 tab ============ */
.dist-tabs { margin-top: 6px; }
.dist-tabs-nav { list-style: none; margin: 0; padding: 0; border-bottom: 1px solid #e6e8eb; display: flex; gap: 0; }
.dist-tabs-nav li {
  padding: 12px 22px;
  cursor: pointer;
  font-size: 14px;
  color: #666f7c;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
  user-select: none;
  position: relative;
  top: 1px;
}
.dist-tabs-nav li:hover { color: var(--accent); }
.dist-tabs-nav li.dist-tabs-this {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
  background: #f7fbff;
}
.dist-tabs-body { padding: 18px 0; }
.table-actions { white-space: nowrap; }
.table-actions form { display: inline-block; margin: 0 3px 3px 0; }
.contents-table .col-step,
.contents-table .col-type,
.contents-table .col-sort,
.contents-table .col-actions { text-align: center; }

/* ========== 面板 ========== */
.layui-panel {
  padding: 0 !important;
  border-radius: var(--radius-lg) !important;
  border-color: var(--card-border) !important;
  box-shadow: var(--shadow-card) !important;
  overflow: hidden;
  margin-bottom: 12px;
}
.layui-panel > div:first-child {
  padding: 14px 18px;
  background: #fafbfc;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.layui-panel details.layui-panel-inner { padding: 16px 18px; background: #fff; }

/* ========== 表单 ========== */
.layui-form-label {
  width: 110px;
  text-align: right;
  padding: 9px 12px 9px 0;
  color: var(--text-secondary);
  font-size: 13px;
  box-sizing: border-box;
}
.layui-input-block { margin-left: 140px; min-height: 36px; }
.layui-input,
.layui-textarea,
.layui-select-title input {
  height: 36px !important;
  line-height: 36px !important;
  border-radius: var(--radius-md) !important;
  border-color: #d4d6d9 !important;
  font-size: 13px !important;
  padding: 0 10px !important;
}
.layui-textarea { height: auto !important; min-height: 90px !important; line-height: 1.6 !important; padding: 8px 10px !important; }
.layui-input:focus,
.layui-textarea:focus,
.layui-select-title input:focus {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 2px var(--accent-light) !important;
}
.layui-form-item { margin-bottom: 16px; }
.layui-form-checked[lay-skin=switch] i { background-color: var(--accent) !important; }

/* 按钮 */
.layui-btn {
  border-radius: var(--radius-md) !important;
  font-size: 13px !important;
  padding: 0 16px !important;
  height: 34px !important;
  line-height: 34px !important;
}
.layui-btn-normal {
  background-color: var(--accent) !important;
}
.layui-btn-normal:hover {
  background-color: var(--accent-hover) !important;
}
.layui-btn-primary {
  border-color: #d4d6d9 !important;
  color: var(--text-secondary) !important;
}
.layui-btn-primary:hover {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
}
.layui-btn-xs { height: 26px !important; line-height: 26px !important; font-size: 12px !important; padding: 0 10px !important; }
.layui-btn-danger { background-color: var(--danger) !important; }

/* 面包屑 / 徽标 */
.layui-badge { border-radius: var(--radius-sm); font-size: 12px; padding: 0 8px; height: 20px; line-height: 20px; }
.layui-badge-dot { border-radius: 50%; }

/* ========== 登录/安装 ========== */
.login-wrap, .install-wrap {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-modal);
}
.login-wrap {
  width: 400px;
  margin: 10vh auto;
  padding: 36px 32px;
}
.login-title {
  text-align: center;
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 24px;
}
.install-wrap {
  max-width: 760px;
  margin: 35px auto;
  padding: 28px 32px;
}
.install-wrap h1 {
  text-align: center;
  color: var(--text-primary);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 24px;
}

/* ========== 响应式 ========== */
@media (max-width: 1000px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .admin-side { width: 0; }
  .admin-main { margin-left: 0; }
  .admin-content { padding: 14px; }
  .stat-grid { grid-template-columns: 1fr; }
}