/* ===== 后台布局 ===== */
.admin-body{background:#eef2f6;display:flex;min-height:100vh}
.admin-side{width:230px;background:var(--navy-2);color:#cdd9e4;flex-shrink:0;display:flex;flex-direction:column}
.admin-logo{padding:22px 20px;font-size:17px;font-weight:800;color:#fff;border-bottom:1px solid rgba(255,255,255,.08);line-height:1.3}
.admin-logo small{display:block;font-size:11px;font-weight:400;color:#7e95a8;letter-spacing:2px;margin-top:4px}
.admin-side nav ul{list-style:none;padding:10px 0}
.admin-side nav a{display:flex;align-items:center;justify-content:space-between;padding:12px 22px;color:#bcccda;font-size:14.5px;border-left:3px solid transparent}
.admin-side nav a:hover{background:rgba(255,255,255,.06);color:#fff}
.admin-side nav li.active a{background:rgba(245,166,35,.15);color:#fff;border-left-color:var(--accent)}
.badge{background:var(--accent);color:#fff;border-radius:10px;padding:1px 8px;font-size:11px}
.admin-main{flex:1;display:flex;flex-direction:column;min-width:0}
.admin-top{height:56px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:flex-end;gap:24px;padding:0 26px;color:var(--muted);font-size:14px}
.admin-content{padding:26px;overflow:auto}

/* 后台通用组件 */
.admin-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:22px;box-shadow:0 4px 16px rgba(13,59,92,.05)}
.admin-title{font-size:20px;color:var(--navy);margin-bottom:18px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}
.btn-sm{padding:7px 14px;font-size:13px;border-radius:6px;border:none;cursor:pointer;font-weight:600;background:var(--navy);color:#fff}
.btn-sm:hover{background:#11507a}
.btn-sm.accent{background:var(--accent);color:#fff}
.btn-sm.accent:hover{background:#ffb733}
.btn-sm.danger{background:#c0392b}
.btn-sm.danger:hover{background:#a93226}
.btn-sm.ghost{background:#fff;border:1px solid var(--line);color:var(--ink)}
.btn-sm.ghost:hover{border-color:var(--accent);color:var(--accent)}

.admin-table{width:100%;border-collapse:collapse;background:#fff;font-size:14px}
.admin-table th,.admin-table td{padding:11px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
.admin-table th{background:#f3f6fa;color:var(--navy);font-weight:700}
.admin-table tr:hover td{background:#fafcff}
.admin-table img{width:56px;height:42px;object-fit:cover;border-radius:5px}
.tag{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px}
.tag.on{background:#e7f7ee;color:#1f8a4c}
.tag.off{background:#fdecec;color:#c0392b}

.admin-form{max-width:820px}
.admin-form .field input,.admin-form .field textarea,.admin-form .field select{background:#fff}
.admin-form textarea{min-height:160px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}
.preview-img{max-width:160px;border:1px solid var(--line);border-radius:6px;margin-top:8px}

/* 仪表盘 */
.dash-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:24px}
.dash-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:22px;box-shadow:0 4px 16px rgba(13,59,92,.05)}
.dash-card .n{font-size:30px;font-weight:800;color:var(--navy)}
.dash-card .l{color:var(--muted);margin-top:6px}
.dash-card .n.acc{color:var(--accent)}

.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,var(--navy),#11507a)}
.login-box{background:#fff;border-radius:14px;padding:38px 34px;width:360px;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.login-box h1{font-size:22px;text-align:center;color:var(--navy)}
.login-sub{text-align:center;color:var(--muted);margin:6px 0 22px;font-size:13px}
.login-back{text-align:center;margin-top:16px;font-size:13px;color:var(--muted)}

@media(max-width:860px){
  .admin-side{position:fixed;left:0;top:0;bottom:0;z-index:99;transform:translateX(-100%);transition:.25s}
  .admin-side.open{transform:none}
  .dash-cards{grid-template-columns:repeat(2,1fr)}
  .row2,.row3{grid-template-columns:1fr}
}