/* ============================================================
   后台管理样式
   ============================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --brand: #1677ff;
    --brand-dark: #0958d9;
    --bg: #f0f2f5;
    --panel: #fff;
    --ink: #333;
    --muted: #8a8f9a;
    --line: #e8eaee;
    --danger: #e5484d;
    --ok: #12b76a;
}
body { font-family: "PingFang SC","Microsoft YaHei",Arial,sans-serif; background: var(--bg); color: var(--ink); font-size: 14px; line-height: 1.6; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: #f1f3f6; padding: 1px 5px; border-radius: 4px; font-size: 13px; }

.admin-shell { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: #141a2e; color: #cfd6e4; display: flex; flex-direction: column; flex-shrink: 0; }
.sb-brand { padding: 22px 20px 6px; font-size: 18px; font-weight: 700; color: #fff; }
.sb-ver { padding: 0 20px 14px; font-size: 12px; color: #6b7488; }
.sb-nav { flex: 1; }
.sb-nav a { display: block; padding: 12px 20px; color: #b8c0d0; font-size: 14px; border-left: 3px solid transparent; }
.sb-nav a:hover { background: #1d2440; color: #fff; text-decoration: none; }
.sb-nav a.active { background: #1d2440; color: #fff; border-left-color: var(--brand); }
.sb-foot { padding: 16px 20px; border-top: 1px solid #242c46; }
.sb-foot a { color: #8b93a8; }

.content { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.content-head { background: #fff; border-bottom: 1px solid var(--line); padding: 14px 24px; }
.content-head h1 { font-size: 18px; }
.content-body { padding: 20px 24px; }

.stat-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; margin-bottom: 20px; }
.stat-card { background: var(--panel); border-radius: 10px; padding: 18px; box-shadow: 0 1px 4px rgba(20,40,80,.06); text-align: center; }
.stat-num { font-size: 26px; font-weight: 700; color: var(--brand); }
.stat-label { color: var(--muted); font-size: 13px; margin-top: 4px; }

.grid-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.panel { background: var(--panel); border-radius: 10px; padding: 20px; box-shadow: 0 1px 4px rgba(20,40,80,.06); margin-bottom: 18px; }
.panel h2 { font-size: 16px; margin-bottom: 12px; color: #1a2240; }
.panel h3 { font-size: 14px; color: #1a2240; }
.panel-narrow { max-width: 660px; }
.quick-actions { margin-top: 18px; }

.tbl { width: 100%; border-collapse: collapse; background: #fff; }
.tbl th, .tbl td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--line); }
.tbl th { background: #f8f9fb; color: #5b6472; font-weight: 600; font-size: 13px; }
.tbl tr:hover td { background: #fafbfd; }
.ellipsis { max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ops { white-space: nowrap; }
.ops a { margin-right: 12px; }
.ops a.danger, a.danger { color: var(--danger); }
.muted { color: var(--muted); }
.tip { margin-top: 12px; font-size: 13px; line-height: 1.8; }

.toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.btn-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
button, .btn, .btn-primary { display: inline-block; padding: 8px 16px; border-radius: 8px; font-size: 14px; cursor: pointer; border: 1px solid transparent; }
button { background: var(--brand); color: #fff; }
.btn { background: #fff; border-color: #d6d9df; color: #333; }
.btn:hover { text-decoration: none; background: #f5f7fa; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); text-decoration: none; }
.btn-block { display: block; width: 100%; }
.danger.btn { border-color: #f2c2c4; color: var(--danger); }

label { display: block; font-size: 13px; color: #444; margin: 12px 0 4px; }
label.inline { display: inline-flex; align-items: center; gap: 6px; margin-right: 14px; }
input[type=text], input[type=password], input[type=number], select, textarea {
    width: 100%; padding: 9px 10px; border: 1px solid #d6d9df; border-radius: 8px; font-size: 14px; background: #fff; color: #333;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 2px rgba(22,119,255,.12); }
textarea { resize: vertical; font-family: inherit; }
hr { border: 0; border-top: 1px solid var(--line); margin: 16px 0; }

.alert { padding: 11px 15px; border-radius: 8px; margin-bottom: 16px; }
.alert-ok { background: #e6f7ef; color: #0f9d5a; border: 1px solid #b7e6cd; }
.alert-err { background: #fdeeee; color: var(--danger); border: 1px solid #f6c8ca; }

.badge { display: inline-block; padding: 2px 9px; border-radius: 20px; font-size: 12px; }
.badge-on { background: #e6f7ef; color: #0f9d5a; }
.badge-off { background: #f0f2f5; color: #8a8f9a; }
.badge-err { background: #fdeeee; color: var(--danger); }

.pager { display: flex; gap: 8px; margin: 16px 0; }
.pager a, .pager .cur { display: inline-block; padding: 5px 12px; border-radius: 6px; border: 1px solid #d6d9df; font-size: 13px; }
.pager .cur { background: var(--brand); color: #fff; border-color: var(--brand); }

.preview-body { border: 1px solid var(--line); border-radius: 8px; padding: 18px; background: #fafbfc; }
.preview-body h2 { font-size: 18px; margin: 16px 0 8px; }
.preview-body h3 { margin: 12px 0 6px; }
.preview-body p { margin-bottom: 12px; }

/* 登录页 */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: linear-gradient(135deg, #1677ff, #6c5ce7); }
.login-box { background: #fff; border-radius: 14px; padding: 36px; width: 360px; box-shadow: 0 12px 40px rgba(0,0,0,.18); }
.login-logo { font-size: 40px; text-align: center; }
.login-box h1 { text-align: center; font-size: 20px; margin-top: 6px; }
.login-sub { text-align: center; color: var(--muted); margin-bottom: 18px; font-size: 13px; }
.login-box label { text-align: left; }
.login-box button { margin-top: 16px; }
.login-hint { margin-top: 14px; font-size: 12px; color: var(--muted); text-align: center; }

@media (max-width: 900px) {
    .stat-grid { grid-template-columns: repeat(3, 1fr); }
    .grid-2col { grid-template-columns: 1fr; }
    .sidebar { width: 64px; }
    .sb-brand { font-size: 0; padding: 20px 8px; }
    .sb-brand::after { content: "🦐"; font-size: 22px; }
    .sb-ver, .sb-nav a { font-size: 0; padding: 12px 8px; text-align: center; }
    .sb-nav a::first-letter { font-size: 14px; }
    .sb-foot a { font-size: 0; }
    .sb-foot a::before { content: "⏻"; font-size: 16px; }
}