/* 产品后台样式 —— 主题通过 CSS 变量覆盖配色 */
* { box-sizing: border-box; }

body {
    margin: 0;
    background: #f4f5f7;
    color: #1c1f26;
    font-family: -apple-system, "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
    font-size: 14px;
    line-height: 1.7;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.muted { color: #6b7280; }
.small { font-size: 13px; }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: 13px; }
.required { color: #e5484d; }

/* 骨架 */
.shell { display: flex; min-height: 100vh; }
.sidebar {
    width: 200px; flex-shrink: 0; background: #1b1e27; color: #c8ccd6;
    display: flex; flex-direction: column; padding: 18px 0; position: sticky; top: 0; height: 100vh;
}
.brand { font-size: 16px; font-weight: 600; color: #fff; padding: 0 20px 18px;
         border-bottom: 1px solid #2b2f3a; margin-bottom: 12px; }
.sidebar nav { display: flex; flex-direction: column; flex: 1; }
.sidebar nav a { padding: 10px 20px; color: #c8ccd6; border-left: 3px solid transparent; }
.sidebar nav a:hover { background: #242833; color: #fff; text-decoration: none; }
.sidebar nav a.on { background: #242833; color: #fff; border-left-color: var(--primary); }
.sidebar-foot { padding: 14px 20px 0; border-top: 1px solid #2b2f3a; display: flex;
                flex-direction: column; gap: 4px; }
.sidebar-foot a { color: #8f95a3; font-size: 13px; }

.main { flex: 1; padding: 24px 28px 60px; min-width: 0; }
.page-head { margin-bottom: 20px; }
.page-head h1 { font-size: 20px; margin: 0; }

/* 提示条 */
.flash { padding: 11px 16px; border-radius: var(--radius); margin-bottom: 18px; }
.flash-info { background: #eef4ff; color: #1a4bd0; }
.flash-success { background: #e8f6f0; color: #12805c; }
.flash-error { background: #fdeceb; color: #c0392b; }
.flash-warning { background: #fff8e6; color: #b26a00; }

/* 卡片与指标 */
.card { background: #fff; border: 1px solid #e6e8ec; border-radius: var(--radius);
        padding: 22px; margin-bottom: 18px; }
.card h2 { font-size: 15px; margin: 0 0 14px; }
.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
         gap: 14px; margin-bottom: 18px; }
.stat { background: #fff; border: 1px solid #e6e8ec; border-radius: var(--radius); padding: 18px; }
.stat-label { font-size: 13px; color: #6b7280; margin-bottom: 6px; }
.stat-value { font-size: 24px; font-weight: 600; }
.stat-hint { font-size: 12px; color: #6b7280; margin-top: 4px; }
.badge-ok { color: #12805c; }
.badge-warn { color: #b26a00; }
.badge-bad { color: #c0392b; }

/* 表格 */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 11px 12px; border-bottom: 1px solid #e6e8ec; text-align: left; }
.table th { background: #fafbfc; color: #6b7280; font-weight: 500; font-size: 13px; }
.table tr:last-child td { border-bottom: none; }
.actions { display: flex; gap: 8px; align-items: center; }

/* 表单 */
label { display: block; margin-bottom: 16px; font-size: 14px; color: #6b7280; }
input[type=text], input[type=password], input[type=number], select, textarea {
    display: block; width: 100%; margin-top: 6px; padding: 9px 12px;
    border: 1px solid #e6e8ec; border-radius: var(--radius);
    font-size: 15px; font-family: inherit; color: #1c1f26; background: #fff;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); }
textarea { min-height: 80px; resize: vertical; }
.form-actions { display: flex; gap: 10px; margin-top: 20px; }
.inline { display: inline; }

/* 按钮 */
.btn { display: inline-block; padding: 8px 16px; border-radius: var(--radius);
       border: 1px solid #e6e8ec; background: #fff; color: #1c1f26; cursor: pointer;
       font-size: 13px; font-family: inherit; line-height: 1.5; }
.btn:hover { border-color: #c9ccd4; text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { opacity: .9; }
.btn-danger { color: #c0392b; border-color: #f0c8c3; }
.btn-danger:hover { background: #fdeceb; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-block { display: block; width: 100%; }

/* 工具条 */
.toolbar { display: flex; justify-content: space-between; align-items: center;
           gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.search { display: flex; gap: 8px; }
.search input { width: 220px; margin: 0; }

/* 详情列表 */
.kv { display: grid; grid-template-columns: 140px 1fr; gap: 8px 16px; margin: 0; }
.kv dt { color: #6b7280; }
.kv dd { margin: 0; }

/* 登录页 */
.login-body { display: grid; place-items: center; min-height: 100vh; background: #f4f5f7; }
.login-box { background: #fff; border: 1px solid #e6e8ec; border-radius: 14px;
             padding: 36px 32px; width: 100%; max-width: 380px; }
.login-box h1 { font-size: 20px; margin: 0 0 6px; text-align: center; }
.login-box > p { text-align: center; margin: 0 0 22px; }
.login-box label { margin-bottom: 14px; }