:root{
  --bg:#0f172a; --panel:#fff; --ink:#1f2937; --muted:#6b7280;
  --line:#e5e7eb; --brand:#0a6cff; --brand2:#0096d6; --green:#16a34a; --red:#dc2626;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#f3f4f6}

/* 登录 */
.login-view{height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#0f172a,#1e3a8a)}
.login-card{background:#fff;padding:36px 32px;border-radius:16px;width:320px;box-shadow:0 20px 50px rgba(0,0,0,.3)}
.login-card h1{margin:0 0 4px;font-size:20px}
.login-card .muted{margin:0 0 20px;color:var(--muted);font-size:13px}
.login-card input{display:block;width:100%;padding:11px 12px;margin-bottom:12px;border:1px solid var(--line);border-radius:9px;font-size:14px}
.login-card button{width:100%;padding:11px;border:0;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:15px;cursor:pointer}
.login-card .err{color:var(--red);font-size:13px;margin-top:10px;min-height:18px}

/* 布局 */
.app-view{display:flex;min-height:100vh}
.sidebar{width:210px;background:var(--bg);color:#cbd5e1;display:flex;flex-direction:column;position:fixed;top:0;bottom:0;left:0}
.sidebar .brand{padding:22px 18px;font-size:18px;font-weight:700;color:#fff;line-height:1.3}
.sidebar .brand span{font-size:12px;color:#94a3b8;font-weight:400}
.sidebar nav{flex:1;padding:8px}
.sidebar nav a{display:block;padding:11px 16px;border-radius:9px;color:#cbd5e1;cursor:pointer;font-size:14px;margin-bottom:4px}
.sidebar nav a:hover{background:#1e293b}
.sidebar nav a.active{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff}
.sidebar .side-foot{padding:14px 18px;border-top:1px solid #1e293b;font-size:12px;display:flex;justify-content:space-between;align-items:center}
.sidebar .side-foot button{background:transparent;border:1px solid #475569;color:#cbd5e1;padding:5px 10px;border-radius:7px;cursor:pointer}
.content{margin-left:210px;flex:1;padding:28px 34px;max-width:1100px}
.content h2{margin:0 0 18px;font-size:22px}
.muted{color:var(--muted)}

/* 卡片/表单 */
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px;margin-bottom:16px}
.card h3{margin:0 0 12px;font-size:16px;display:flex;justify-content:space-between;align-items:center}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.field{display:flex;flex-direction:column;gap:5px;margin-bottom:12px}
.field label{font-size:12px;color:var(--muted)}
.field input,.field textarea,.field select{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit}
.field textarea{min-height:70px;resize:vertical}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}

.btn{padding:9px 16px;border:0;border-radius:8px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:14px;cursor:pointer}
.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.btn.danger{background:#fff;color:var(--red);border:1px solid var(--red)}
.btn.green{background:var(--green)}
.btn.sm{padding:6px 12px;font-size:13px}
.actions{margin-top:14px;display:flex;gap:10px}

/* 二级菜单（产品管理：品牌/系列/产品列表） */
.subtabs{display:flex;gap:8px;margin-bottom:18px;flex-wrap:wrap}
.subtab{padding:8px 16px;border:1px solid var(--line);background:#fff;border-radius:9px;cursor:pointer;font-size:14px;color:var(--muted)}
.subtab:hover{border-color:var(--brand)}
.subtab.active{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border-color:transparent}
.field select{padding:9px 11px}

/* 图片 */
.img-prev{width:120px;height:90px;border:1px dashed var(--line);border-radius:8px;object-fit:cover;background:#f8fafc}
.img-cell{display:inline-block;margin:8px;vertical-align:top;text-align:center}

/* 多图画廊编辑 */
.gallery-edit{margin-top:14px;border:1px dashed var(--line);border-radius:10px;padding:14px;background:#f8fafc}
.gallery-edit>label{display:block;font-size:12px;color:var(--muted);margin-bottom:10px}
.gallery-thumbs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:10px}
.gallery-thumbs .gthumb{position:relative;width:96px;height:72px;border-radius:8px;overflow:hidden;border:1px solid var(--line);background:#fff}
.gallery-thumbs .gthumb img{width:100%;height:100%;object-fit:cover}
.gallery-thumbs .gthumb button{position:absolute;top:3px;right:3px;padding:2px 7px;font-size:12px;line-height:1.2;background:#fff;color:var(--red);border:1px solid var(--red);border-radius:6px;cursor:pointer}
.field textarea.ta-lg{min-height:120px;font-size:14px;line-height:1.6}
.img-cell img{width:110px;height:80px;object-fit:cover;border-radius:8px;border:1px solid var(--line)}
.img-cell .nm{font-size:11px;color:var(--muted);max-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 概览 */
.stat{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 22px;margin:0 12px 12px 0;min-width:120px}
.stat b{display:block;font-size:26px;color:var(--brand)}
.stat span{font-size:13px;color:var(--muted)}

/* toast */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#111827;color:#fff;padding:11px 20px;border-radius:10px;font-size:14px;opacity:0;transition:.25s;pointer-events:none;z-index:99}
.toast.show{opacity:1}
.toast.err{background:var(--red)}
.toast.ok{background:var(--green)}

@media(max-width:768px){
  .sidebar{width:100%;position:static;flex-direction:row;flex-wrap:wrap}
  .sidebar nav{display:flex;flex-wrap:wrap}
  .sidebar nav a{margin:2px}
  .content{margin-left:0;padding:18px}
  .grid{grid-template-columns:1fr}
}