/* ============================================
   管理后台 UI — 统一侧边栏布局，适配 PC/手机/微信
   ============================================ */
:root{
  --pri:#6366f1;--pri2:#818cf8;--pri3:#eef2ff;
  --suc:#10b981;--suc2:#d1fae5;
  --warn:#f59e0b;--warn2:#fef3c7;
  --red:#ef4444;--red2:#fee2e2;
  --bg:#f1f5f9;--w:#fff;--t1:#1e293b;--t2:#64748b;--t3:#94a3b8;--b:#e2e8f0;
  --sb:#1e293b;--sb-h:#334155;--sb-a:rgba(99,102,241,.18);--sb-t:rgba(255,255,255,.7);--sb-t2:rgba(255,255,255,.4);
  --sh:0 1px 3px rgba(0,0,0,.06);--sh2:0 4px 12px rgba(0,0,0,.08);
  --r:12px;--r2:8px;--sw:240px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--t1);min-height:100vh;line-height:1.6;overflow-x:hidden}
a{text-decoration:none}
ul{list-style:none}

/* ====== 整体布局 ====== */
.app{display:flex;min-height:100vh;max-width:100vw;overflow:hidden}
.sidebar{width:var(--sw);background:var(--sb);position:fixed;top:0;left:0;bottom:0;z-index:200;display:flex;flex-direction:column;transition:transform .25s ease;overflow-y:auto}
.main-area{flex:1;margin-left:var(--sw);display:flex;flex-direction:column;min-height:100vh;transition:margin .25s ease;min-width:0}
.topbar{background:var(--w);height:56px;display:flex;align-items:center;padding:0 24px;box-shadow:0 1px 3px rgba(0,0,0,.04);position:sticky;top:0;z-index:100;gap:16px;flex-shrink:0;overflow:hidden}
.content{padding:24px;flex:1;min-width:0;max-width:100%}

/* ====== 侧边栏 ====== */
.side-logo{padding:20px;display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700;color:#fff;border-bottom:1px solid rgba(255,255,255,.08)}
.side-logo svg{color:var(--pri2);flex-shrink:0}
.side-nav{flex:1;padding:8px 10px;display:flex;flex-direction:column;gap:2px}
.side-nav a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--r2);color:var(--sb-t);font-size:13px;font-weight:500;transition:all .15s;position:relative}
.side-nav a:hover{background:rgba(255,255,255,.06);color:#fff}
.side-nav a.active{background:var(--sb-a);color:#fff;font-weight:600}
.side-nav a .i{width:18px;height:18px;flex-shrink:0;color:var(--sb-t2);transition:color .15s}
.side-nav a:hover .i,.side-nav a.active .i{color:#fff}
.side-nav .sep{height:1px;background:rgba(255,255,255,.08);margin:4px 8px}
.side-footer{padding:12px 16px;border-top:1px solid rgba(255,255,255,.08);display:flex;flex-direction:column;gap:6px}
.side-footer a,.side-footer button{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:var(--r2);color:var(--sb-t2);font-size:12px;background:none;border:none;cursor:pointer;font-family:inherit;transition:all .15s;width:100%;text-align:left}
.side-footer a:hover,.side-footer button:hover{background:rgba(255,255,255,.06);color:#fff}
.side-footer a.red:hover,.side-footer button.red:hover{background:rgba(239,68,68,.15);color:var(--red)}
.side-footer a .i,.side-footer button .i{width:14px;height:14px;color:var(--sb-t2);flex-shrink:0}

/* ====== 顶部栏 ====== */
.topbar .hamburger{display:none;width:36px;height:36px;align-items:center;justify-content:center;background:var(--bg);border:none;border-radius:8px;cursor:pointer;font-size:18px;color:var(--t2);flex-shrink:0}
.topbar .hamburger:hover{background:#ddd}
.topbar .bread{font-size:14px;font-weight:600;color:var(--t1);flex:1}
.topbar .top-user{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--t2)}
.topbar .top-user button{background:none;border:none;color:var(--red);cursor:pointer;font-size:13px;font-family:inherit;display:flex;align-items:center;gap:4px}
.topbar .top-user button:hover{color:#dc2626}

/* ====== 遮罩 ====== */
.mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:199;animation:fadeIn .2s}
.mask.show{display:block}

/* ====== 统计卡片 ====== */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:24px}
.stat{background:var(--w);border-radius:var(--r);padding:18px;box-shadow:var(--sh);display:flex;align-items:center;gap:14px;transition:transform .15s,box-shadow .15s}
.stat:hover{transform:translateY(-2px);box-shadow:var(--sh2)}
.stat .si{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.stat .si svg{width:22px;height:22px}
.stat .si.b{background:var(--pri3);color:var(--pri)}
.stat .si.g{background:var(--suc2);color:var(--suc)}
.stat .si.o{background:var(--warn2);color:var(--warn)}
.stat .si.r{background:var(--red2);color:var(--red)}
.stat .sb{flex:1;min-width:0}
.stat .sv{font-size:22px;font-weight:700;color:var(--t1);line-height:1.2}
.stat .sl{font-size:12px;color:var(--t3);margin-top:2px}

/* ====== 卡片 ====== */
.card{background:var(--w);border-radius:var(--r);padding:24px;box-shadow:var(--sh);margin-bottom:20px}
.card h3{font-size:16px;color:var(--t1);margin-bottom:16px;display:flex;align-items:center;gap:8px}
.card canvas{max-height:280px!important;max-width:100%}

/* ====== 表单 ====== */
.fg{margin-bottom:16px}
.fg label{display:block;margin-bottom:5px;color:var(--t2);font-size:13px;font-weight:500}
.fg input,.fg select,.fg textarea{width:100%;padding:9px 13px;border:1.5px solid var(--b);border-radius:var(--r2);font-size:14px;color:var(--t1);background:var(--w);transition:border .2s,box-shadow .2s;outline:none;font-family:inherit}
.fg input:focus,.fg select:focus,.fg textarea:focus{border-color:var(--pri);box-shadow:0 0 0 3px rgba(99,102,241,.1)}
.fg textarea{min-height:90px;resize:vertical}

/* ====== 按钮 ====== */
.btn{display:inline-flex;align-items:center;gap:5px;padding:8px 18px;border:none;border-radius:var(--r2);font-size:13px;font-weight:600;cursor:pointer;transition:all .15s;font-family:inherit}
.btn-p{background:var(--pri);color:#fff}.btn-p:hover{background:#4f46e5;box-shadow:0 2px 8px rgba(99,102,241,.3)}
.btn-s{background:var(--t2);color:#fff}.btn-s:hover{background:var(--t1)}
.btn-d{background:var(--red);color:#fff}.btn-d:hover{background:#dc2626}
.btn-x{background:none;border:none;color:var(--pri);cursor:pointer;font-size:12px;font-family:inherit}.btn-x:hover{text-decoration:underline}
.btn-x.red{color:var(--red)}
.btn-sml{padding:4px 10px;font-size:11px}

/* ====== 表格 ====== */
.tbl-wrap{overflow-x:auto}
.tbl{width:100%;border-collapse:collapse;font-size:13px}
.tbl th{background:var(--bg);padding:10px 14px;text-align:left;font-size:12px;color:var(--t2);font-weight:600;text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--b);white-space:nowrap}
.tbl td{padding:10px 14px;border-bottom:1px solid var(--b);color:var(--t1)}
.tbl tr:last-child td{border-bottom:none}
.tbl tbody tr:hover td{background:#f8fafc}
.tag{display:inline-block;padding:2px 8px;border-radius:20px;font-size:11px;font-weight:600}
.tag-ok{background:var(--suc2);color:var(--suc)}
.tag-w{background:var(--warn2);color:var(--warn)}
.tag-d{background:var(--red2);color:var(--red)}

/* ====== 消息 ====== */
.msg{background:var(--suc2);color:#065f46;padding:10px 14px;border-radius:var(--r2);margin-bottom:16px;font-size:13px}
.msg-e{background:var(--red2);color:#991b1b}

/* ====== 分页 ====== */
.pg{display:flex;justify-content:center;gap:4px;margin-top:16px;flex-wrap:wrap}
.pg a,.pg span{padding:6px 11px;border-radius:var(--r2);font-size:12px;color:var(--t2);border:1px solid var(--b)}
.pg a:hover{background:var(--pri3);border-color:var(--pri);color:var(--pri)}
.pg .cur{background:var(--pri);color:#fff;border-color:var(--pri)}

/* ====== 计划卡 ====== */
.plan-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin-top:16px}
.plan-card{border:2px solid var(--b);border-radius:var(--r);padding:22px;text-align:center;transition:all .2s;background:var(--w)}
.plan-card:hover{border-color:var(--pri);transform:translateY(-2px);box-shadow:var(--sh2)}
.plan-card h4{font-size:14px;color:var(--t2);margin-bottom:8px}
.plan-card .price{font-size:30px;font-weight:700;color:var(--pri);margin-bottom:14px}
.plan-card .price span{font-size:13px;color:var(--t3);font-weight:400}
.plan-actions{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}

/* ====== 工具类 ====== */
.row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.spacer{flex:1}
.tc{text-align:center}.tm{color:var(--t3);font-size:12px}.ts{font-size:13px}.mt{margin-top:16px}.mb{margin-bottom:12px}

/* ====== 响应式 ====== */
@media(max-width:1024px){
  .sidebar{transform:translateX(-100%)}.sidebar.open{transform:translateX(0)}
  .main-area{margin-left:0}
  .topbar .hamburger{display:flex}
  .content{padding:14px}
  .card{padding:16px;border-radius:10px;margin-bottom:14px}
  .card h3{font-size:15px}
  .stats{grid-template-columns:1fr 1fr;gap:8px}
  .stat{padding:14px;gap:10px}.stat .si{width:36px;height:36px}.stat .sv{font-size:18px}
  .tbl{min-width:550px}
  .tbl th,.tbl td{padding:8px 10px;font-size:11px}
  .plan-grid{grid-template-columns:1fr}
}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}