/* 后台管理样式（PC 优先，兼容窄屏） */
* { box-sizing: border-box; }
body.admin {
    margin: 0;
    background: #f2f4f8;
    color: #1f2937;
    font: 14px/1.6 -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}
a { color: #2563eb; text-decoration: none; }

/* 布局 */
.adm-side {
    position: fixed; left: 0; top: 0; bottom: 0; width: 212px;
    background: linear-gradient(180deg, #1e3a8a 0%, #1d4ed8 100%);
    color: #fff; padding: 18px 12px; overflow-y: auto;
}
.adm-brand { font-size: 16px; font-weight: 700; padding: 6px 10px 16px; border-bottom: 1px solid rgba(255,255,255,.15); margin-bottom: 12px; }
.adm-brand small { display: block; font-size: 12px; font-weight: 400; opacity: .75; margin-top: 4px; }
.adm-nav a {
    display: block; padding: 10px 12px; margin-bottom: 4px; border-radius: 8px;
    color: rgba(255,255,255,.85); font-size: 14px;
}
.adm-nav a:hover { background: rgba(255,255,255,.12); color: #fff; }
.adm-nav a.active { background: rgba(255,255,255,.22); color: #fff; font-weight: 700; }
.adm-main { margin-left: 212px; min-height: 100vh; }
.adm-top {
    height: 58px; background: #fff; border-bottom: 1px solid #e5e7eb;
    display: flex; align-items: center; justify-content: space-between; padding: 0 20px;
    position: sticky; top: 0; z-index: 5;
}
.adm-top .adm-title { font-size: 16px; font-weight: 700; }
.adm-top .adm-user { display: flex; align-items: center; gap: 14px; font-size: 13px; color: #4b5563; }
.adm-content { padding: 20px; max-width: 1180px; }

/* 访客（登录/无权限） */
body.admin.guest { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
body.admin.guest .adm-main { margin: 0; }
.adm-login {
    width: 380px; background: #fff; border-radius: 14px; padding: 28px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, .12);
}
.adm-login h2 { margin: 0 0 4px; font-size: 19px; }
.adm-login .sub { color: #6b7280; font-size: 13px; margin-bottom: 18px; }

/* 卡片 */
.adm-card { background: #fff; border-radius: 12px; padding: 18px; margin-bottom: 16px; box-shadow: 0 1px 3px rgba(15,23,42,.07); }
.adm-card h3 { margin: 0 0 14px; font-size: 15px; display: flex; align-items: center; justify-content: space-between; }
.adm-card h3 .adm-more { font-size: 13px; font-weight: 400; color: #6b7280; }

/* 统计卡 */
.adm-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 16px; }
.adm-stat { background: #fff; border-radius: 12px; padding: 16px; box-shadow: 0 1px 3px rgba(15,23,42,.07); }
.adm-stat .k { color: #6b7280; font-size: 13px; }
.adm-stat .v { font-size: 24px; font-weight: 700; margin-top: 6px; }
.adm-stat.warn .v { color: #dc2626; }

/* 表单 */
.adm-field { margin-bottom: 14px; }
.adm-label { display: block; font-size: 13px; color: #374151; margin-bottom: 6px; }
.adm-input, .adm-select {
    width: 100%; height: 38px; padding: 0 10px; border: 1px solid #d1d5db;
    border-radius: 8px; background: #fff; font-size: 14px; color: #111827;
}
.adm-input:focus, .adm-select:focus { outline: none; border-color: #2563eb; box-shadow: 0 0 0 3px rgba(37,99,235,.12); }
.adm-row { display: flex; gap: 14px; flex-wrap: wrap; }
.adm-row .adm-field { flex: 1 1 220px; }
.adm-hint { font-size: 12px; color: #6b7280; margin-top: 6px; }

/* 按钮 */
.adm-btn {
    display: inline-block; height: 36px; line-height: 34px; padding: 0 16px; border-radius: 8px;
    border: 1px solid #d1d5db; background: #fff; color: #374151; font-size: 14px; cursor: pointer;
}
.adm-btn:hover { background: #f9fafb; }
.adm-btn.primary { background: #1d4ed8; border-color: #1d4ed8; color: #fff; }
.adm-btn.primary:hover { background: #1e40af; }
.adm-btn.danger { background: #dc2626; border-color: #dc2626; color: #fff; }
.adm-btn.danger:hover { background: #b91c1c; }
.adm-btn.sm { height: 30px; line-height: 28px; padding: 0 10px; font-size: 13px; }
.adm-btn.block { display: block; width: 100%; }
.adm-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* 表格 */
.adm-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.adm-table th, .adm-table td { padding: 10px 12px; border-bottom: 1px solid #eef0f4; text-align: left; vertical-align: middle; }
.adm-table th { background: #f8fafc; color: #4b5563; font-weight: 600; font-size: 13px; }
.adm-table tr:hover td { background: #fafbfe; }
.adm-table .num { text-align: right; }

/* 标签 */
.adm-tag { display: inline-block; padding: 2px 8px; border-radius: 20px; font-size: 12px; background: #eef2ff; color: #4338ca; }
.adm-tag.ok { background: #dcfce7; color: #15803d; }
.adm-tag.off { background: #fee2e2; color: #b91c1c; }
.adm-tag.gray { background: #f3f4f6; color: #4b5563; }

/* 提示 */
.adm-flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 14px; }
.adm-flash.ok { background: #ecfdf5; color: #047857; border: 1px solid #a7f3d0; }
.adm-flash.err { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.adm-empty { padding: 26px; text-align: center; color: #9ca3af; }

/* 搜索条 / 分页 */
.adm-bar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 14px; }
.adm-bar .adm-input { width: 240px; }
.adm-pager { display: flex; gap: 12px; align-items: center; justify-content: center; padding: 12px 0; }
.adm-pager a { padding: 6px 12px; border: 1px solid #d1d5db; border-radius: 8px; background: #fff; }
.adm-tabs { display: flex; gap: 8px; margin-bottom: 14px; }
.adm-tabs a { padding: 7px 14px; border-radius: 8px; background: #fff; border: 1px solid #d1d5db; color: #374151; }
.adm-tabs a.active { background: #1d4ed8; border-color: #1d4ed8; color: #fff; }

/* 权限明细 */
.adm-perm-group { border: 1px solid #eef0f4; border-radius: 10px; padding: 12px 14px; margin-bottom: 12px; background: #fcfdff; }
.adm-perm-title { font-size: 13px; font-weight: 700; color: #1f2937; margin-bottom: 8px; }
.adm-perm-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 8px 16px; }
.adm-perm-item { display: flex; align-items: center; gap: 8px; padding: 6px 8px; border-radius: 8px; background: #fff; border: 1px solid #eef0f4; }
.adm-perm-item:hover { border-color: #c7d2fe; }
.adm-perm-item input { width: 16px; height: 16px; }
.adm-perm-name { font-size: 13px; flex: 1 1 auto; }
.adm-perm-item code { font-size: 11px; color: #6b7280; }

/* 环境信息 */
.adm-kv { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 8px 20px; font-size: 13px; }
.adm-kv div { display: flex; justify-content: space-between; border-bottom: 1px dashed #eef0f4; padding: 6px 0; }
.adm-kv span:last-child { color: #4b5563; }

@media (max-width: 900px) {
    .adm-side { position: static; width: auto; display: flex; flex-wrap: wrap; gap: 6px; padding: 10px; }
    .adm-brand { border: 0; padding: 6px 10px; margin: 0; flex: 1 1 100%; }
    .adm-nav { display: flex; gap: 6px; flex-wrap: wrap; }
    .adm-nav a { margin: 0; padding: 6px 10px; }
    .adm-main { margin-left: 0; }
    .adm-content { padding: 14px; }
}