:root {
  --primary: #2f6bff;
  --primary-dark: #1f56e0;
  --primary-light: #eef3ff;
  --bg: #f4f6f9;
  --card: #ffffff;
  --text: #1f2329;
  --muted: #8a9099;
  --border: #eceef1;
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
  --radius: 10px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 14px;
}

a { color: var(--primary); text-decoration: none; }

.admin-layout { display: flex; min-height: 100vh; }

/* ============ 侧边栏 ============ */
.sidebar {
  width: 168px;
  background: #fff;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.sidebar-brand {
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}
.sidebar-brand .logo {
  width: 26px; height: 26px;
  border-radius: 7px;
  background: var(--primary);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 13px; font-weight: 700;
}
.sidebar-menu { padding: 2px 8px 18px; flex: 1; }
.sidebar-menu .group-label {
  font-size: 11.5px;
  color: #a3a9b3;
  padding: 0 10px;
  margin: 14px 0 4px;
}
.sidebar-menu a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 6px;
  color: #5a6069;
  font-size: 13px;
  margin-bottom: 1px;
  transition: all .15s;
}
.sidebar-menu a .mi { width: 15px; height: 15px; flex-shrink: 0; }
.sidebar-menu a:hover { background: #f5f7fa; color: var(--text); }
.sidebar-menu a.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.sidebar-footer {
  padding: 10px 12px 16px;
  border-top: 1px solid var(--border);
  font-size: 13px;
}
.sidebar-footer a {
  display: flex; align-items: center; gap: 8px;
  color: #5a6069; padding: 7px 10px; border-radius: 6px;
}
.sidebar-footer a .mi { width: 15px; height: 15px; }
.sidebar-footer a:hover { background: #f5f7fa; color: var(--text); }

/* ============ 主区域 ============ */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 20;
}
.topbar h1 { font-size: 16px; font-weight: 600; }
.topbar .topbar-right { display: flex; align-items: center; gap: 16px; }
.topbar .logout-link { display: flex; align-items: center; gap: 5px; color: #5a6069; font-size: 13px; }
.topbar .logout-link .mi { width: 14px; height: 14px; }
.topbar .logout-link:hover { color: var(--primary); }
.topbar .user-chip { display: flex; align-items: center; gap: 8px; font-size: 13.5px; color: #4a5058; position: relative; cursor: pointer; }
.topbar .caret { color: #9aa1ab; font-size: 10px; }
.topbar .user-menu {
  display: none;
  position: absolute; right: 0; top: 42px;
  background: #fff; border: 1px solid var(--border);
  border-radius: 8px; box-shadow: 0 8px 24px rgba(16,24,40,.12);
  min-width: 130px; padding: 6px; z-index: 60;
}
.topbar .user-chip:hover .user-menu { display: block; }
.topbar .user-menu a { display: block; padding: 8px 12px; border-radius: 6px; font-size: 13px; color: #4a5058; }
.topbar .user-menu a:hover { background: #f5f7fa; color: var(--primary); }
.topbar .avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: #e8eefc; color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
}
.content { padding: 20px 24px 40px; }

/* ============ 卡片 ============ */
.card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 18px 20px;
  margin-bottom: 16px;
}
.card-title { font-size: 15px; font-weight: 600; margin-bottom: 16px; }

/* 统计卡片 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 16px; }
.stat {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 18px 20px;
}
.stat .label { color: #6b7280; font-size: 13px; }
.stat .value { font-size: 32px; font-weight: 700; line-height: 1.25; margin-top: 2px; }
.stat .value.warning { color: var(--warning); }
.stat .value.danger { color: var(--danger); }
.stat .value .unit { font-size: 15px; color: var(--muted); font-weight: 500; }
.stat .sub { color: var(--success); font-size: 12.5px; margin-top: 4px; }
.stat .sub.muted { color: var(--muted); }
.stat .sub.warn { color: var(--warning); }
.stat .sub.danger { color: var(--danger); }

/* 公告 */
.notice-empty { color: var(--muted); font-size: 13.5px; padding: 6px 0 2px; }

/* 趋势图 */
.chart-head { display: flex; justify-content: space-between; align-items: center; }
.legend { display: flex; align-items: center; gap: 6px; font-size: 12.5px; color: #6b7280; }
.legend .dot { width: 10px; height: 10px; border-radius: 2px; background: var(--success); }
.chart-wrap { margin-top: 8px; }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 8px 16px; border-radius: 7px;
  font-weight: 500; font-size: 13px;
  border: 1px solid transparent; cursor: pointer;
  transition: all .2s; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: #fff; color: var(--primary); border-color: #c7d7fe; }
.btn-outline:hover { background: var(--primary-light); }
.btn-danger { background: #fff; color: var(--danger); border-color: #fecaca; }
.btn-danger:hover { background: #fef2f2; }
.btn-sm { padding: 4px 10px; font-size: 12px; border-radius: 6px; }

/* ============ 表单 ============ */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 500; font-size: 13px; margin-bottom: 6px; color: #4a5058; }
.form-control {
  width: 100%; padding: 8px 12px;
  border: 1px solid #dfe3e8; border-radius: 7px;
  font-size: 13.5px; background: #fff; color: var(--text);
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47,107,255,.1); }
textarea.form-control { resize: vertical; min-height: 90px; }

/* ============ 表格 ============ */
table { width: 100%; border-collapse: collapse; }
th, td { padding: 11px 14px; text-align: left; font-size: 13px; border-bottom: 1px solid var(--border); }
th { background: #fafbfc; font-weight: 600; color: #6b7280; white-space: nowrap; }
tr:hover td { background: #fafbfc; }

/* ============ 徽章 ============ */
.badge-status { display: inline-block; padding: 2px 9px; border-radius: 5px; font-size: 12px; font-weight: 500; }
.badge-success { background: #ecfdf3; color: #067647; }
.badge-danger { background: #fef3f2; color: #b42318; }
.badge-warning { background: #fffaeb; color: #b54708; }
.badge-info { background: #eff4ff; color: #175cd3; }
.badge-muted { background: #f2f4f7; color: #475467; }

/* ============ 提示 ============ */
.alert { padding: 11px 15px; border-radius: 8px; margin-bottom: 16px; font-size: 13.5px; }
.alert-success { background: #ecfdf3; color: #067647; border: 1px solid #abefc6; }
.alert-danger { background: #fef3f2; color: #b42318; border: 1px solid #fecdca; }
.alert-info { background: #eff8ff; color: #175cd3; border: 1px solid #b2ddff; }
.alert-warning { background: #fffaeb; color: #b54708; border: 1px solid #fedf89; }

/* ============ 工具类 ============ */
.table-wrap { overflow-x: auto; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mt-16 { margin-top: 16px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }
.text-muted { color: var(--muted); }
.text-center { text-align: center; }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }

/* ============ 登录页 ============ */
.login-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #eef3ff, #f7f9fc 60%, #e8f0ff); padding: 20px;
}
.login-card {
  background: #fff; border-radius: 14px; padding: 38px;
  width: 100%; max-width: 400px;
  border: 1px solid var(--border);
  box-shadow: 0 12px 40px rgba(47,107,255,.1);
}
.login-card h2 { text-align: center; margin-bottom: 6px; font-size: 21px; }
.login-card .sub { text-align: center; color: var(--muted); margin-bottom: 24px; font-size: 13.5px; }

/* ============ 悬浮客服按钮 ============ */
.float-help {
  position: fixed;
  right: 22px;
  top: 58%;
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 18px rgba(47,107,255,.4);
  z-index: 50;
  font-size: 16px; font-weight: 700;
  cursor: pointer;
}
.float-help:hover { background: var(--primary-dark); }

/* ============ 图标基础 ============ */
.mi { display: inline-block; vertical-align: middle; }
.btn .mi { width: 13px; height: 13px; margin-right: 4px; }

/* ============ 响应式 ============ */
@media (max-width: 992px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
}

/* 移动端：顶部标题区、内容留白、表格字体收敛 */
@media (max-width: 768px) {
  .topbar { padding: 0 16px; height: 52px; }
  .topbar h1 { font-size: 15px; }
  .topbar .topbar-right { gap: 12px; }
  .content { padding: 16px 14px 32px; }
  .card { padding: 16px 14px; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .stat { padding: 14px 14px; }
  .stat .value { font-size: 26px; }
  th, td { padding: 10px 10px; font-size: 12.5px; }
  .flex-between { flex-wrap: wrap; gap: 8px; }
  .float-help { right: 14px; width: 36px; height: 36px; }
  /* 关键：卡片与网格允许收缩，宽表格改为容器内滚动，避免把整页撑出横向滚动条 */
  .card, .grid-2 > * { min-width: 0; max-width: 100%; }
  .grid-2 { grid-template-columns: minmax(0, 1fr) !important; }
  .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  /* 页面里内联写死的多列网格，小屏统一收成单列（minmax(0,1fr) 不受内容最小宽度影响） */
  [style*="grid-template-columns"] { grid-template-columns: minmax(0, 1fr) !important; }
  [style*="grid-template-columns"] > * { min-width: 0 !important; }
  [style*="min-width"] { min-width: 0 !important; }
  .form-row-flex { display: flex; gap: 12px; flex-wrap: wrap; }
}

/* 小屏：固定侧边栏变为顶栏抽屉菜单 */
@media (max-width: 700px) {
  .admin-layout { flex-direction: column; }
  .sidebar {
    width: 100%; height: auto; position: static;
    flex-direction: row; align-items: center;
    padding: 0 12px; border-right: none; border-bottom: 1px solid var(--border);
    overflow: visible;
  }
  .sidebar-brand { padding: 10px 4px; flex-shrink: 0; }
  .sidebar-menu {
    display: flex; flex-direction: row; align-items: center;
    gap: 2px; padding: 10px 6px; flex: 1;
    overflow-x: auto; -webkit-overflow-scrolling: touch;
  }
  .sidebar-menu::-webkit-scrollbar { display: none; }
  .sidebar-menu .group-label { display: none; }
  .sidebar-menu a {
    flex-shrink: 0; padding: 7px 12px; margin: 0; white-space: nowrap;
    border: 1px solid var(--border); border-radius: 16px;
  }
  .sidebar-menu a.active { background: var(--primary); color: #fff; }
  .sidebar-menu a .mi { display: none; }
  .sidebar-footer { display: none; }
  .stats { grid-template-columns: 1fr !important; }
  .login-card { padding: 28px 22px; }
}

/* 覆盖页面里内联写死的多列网格（如 style="grid-template-columns:repeat(4,1fr)"） */
@media (max-width: 700px) {
  .stats[style*="repeat(4"], .stats[style*="repeat(3"] { grid-template-columns: repeat(2, 1fr) !important; }
  .form-group[style*="min-width"] { min-width: 0 !important; }
  .form-group[style*="flex:1"], .form-group[style*="flex:2"] { min-width: 0 !important; }
}
@media (max-width: 420px) {
  .stats[style*="repeat(4"], .stats[style*="repeat(3"] { grid-template-columns: 1fr !important; }
}