:root{
  --bg:#f4f6fa; --card:#fff; --text:#1c2333; --muted:#7b8598;
  --accent:#3b82f6; --accent-d:#2563eb; --border:#e7eaf0; --danger:#ef4444;
  --radius:16px; --shadow:0 8px 28px rgba(22,33,64,.09);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--text);font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
.hidden{display:none!important}
.muted{color:var(--muted)}
img{max-width:100%}

/* ---------- 按钮 ---------- */
.btn{border:1px solid var(--border);background:#fff;color:var(--text);padding:10px 15px;border-radius:11px;cursor:pointer;
  font-size:14px;font-family:inherit;line-height:1;transition:.15s;white-space:nowrap}
.btn:hover{background:#f3f5fa}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}
.btn.primary:hover{background:var(--accent-d)}
.btn.ghost{background:transparent}
.btn.ghost:hover{background:#eef2f8}
.btn.block{width:100%;padding:13px}
.btn.danger{color:var(--danger);border-color:#f2c9c9}
.btn.danger:hover{background:#fdf0f0}
.btn.mini{padding:7px 11px;font-size:13px;border-radius:9px}

/* ---------- 顶栏 ---------- */
#topbar{position:sticky;top:0;z-index:30;display:flex;flex-direction:column;gap:10px;
  padding:12px 16px;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.tb-top{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%}
.brand{font-weight:800;font-size:18px;letter-spacing:.3px;white-space:nowrap}
.tb-tools{display:flex;align-items:center;gap:8px;width:100%}
.tb-tools .search{flex:1 1 auto;min-width:0}
.tb-tools .select{flex:0 0 auto}
.tb-tools .btn{flex:0 0 auto}
.search{padding:10px 13px;border:1px solid var(--border);border-radius:11px;font-size:14px;font-family:inherit;outline:none;background:#fff;width:100%}
.search:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(59,130,246,.12)}
.select{padding:10px 10px;border:1px solid var(--border);border-radius:11px;background:#fff;font-size:14px;font-family:inherit;outline:none}
.user-btn{display:inline-flex;align-items:center;gap:6px;max-width:170px}
.user-btn span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.caret{opacity:.5;font-size:11px}
.usermenu{position:relative}
.dropdown{position:absolute;right:0;top:calc(100% + 8px);background:#fff;border:1px solid var(--border);border-radius:14px;
  box-shadow:var(--shadow);min-width:170px;overflow:hidden;z-index:40}
.dropdown a{display:block;padding:12px 16px;cursor:pointer;font-size:14px}
.dropdown a:hover{background:#f4f6fb}

/* ---------- 相册条 ---------- */
.albumbar{display:flex;gap:8px;padding:12px 16px 0;overflow-x:auto;scrollbar-width:none}
.albumbar::-webkit-scrollbar{display:none}
.chip{padding:8px 14px;border-radius:999px;border:1px solid var(--border);background:#fff;cursor:pointer;white-space:nowrap;font-size:13px;transition:.15s}
.chip:hover{border-color:#cdd6e6}
.chip.active{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}

/* ---------- 网格 ---------- */
.grid{padding:16px;display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}
.card-media{position:relative;background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);cursor:pointer;aspect-ratio:1/1}
.card-media img{width:100%;height:100%;object-fit:cover;display:block;background:#eef1f6}
.card-media .badge{position:absolute;top:8px;left:8px;background:rgba(0,0,0,.55);color:#fff;border-radius:8px;padding:2px 8px;font-size:11px}
.card-media .play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;pointer-events:none}
.card-media .play span{width:50px;height:50px;border-radius:50%;background:rgba(0,0,0,.45);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px}
.card-media .cap{position:absolute;left:0;right:0;bottom:0;padding:18px 10px 8px;color:#fff;font-size:12px;
  background:linear-gradient(transparent,rgba(0,0,0,.7));white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.empty{text-align:center;color:var(--muted);padding:80px 20px}
.morewrap{text-align:center;padding:4px 0 48px}

/* ---------- 弹层 ---------- */
.overlay{position:fixed;inset:0;background:rgba(14,19,32,.55);display:flex;align-items:center;justify-content:center;z-index:50;padding:16px}
.card{background:#fff;border-radius:20px;box-shadow:var(--shadow);padding:26px;width:100%;max-width:420px}
.card h1{margin:0 0 4px;font-size:22px}
.card h2{margin:0;font-size:19px}
.login-card{text-align:center}
.login-card label{display:block;margin:14px 0 0;font-size:14px;color:var(--muted);text-align:left}
.login-card input{width:100%;margin-top:6px;padding:12px 13px;border:1px solid var(--border);border-radius:11px;font-size:15px;font-family:inherit;outline:none}
.login-card input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(59,130,246,.12)}
.login-card .btn{margin-top:20px}
.msg{color:var(--danger);font-size:13px;min-height:18px;margin:10px 0 0}

/* ---------- 上传 ---------- */
.modal-card{max-width:560px;max-height:88vh;overflow:auto}
.dropzone{border:2px dashed #cfd7e6;border-radius:14px;padding:34px 16px;text-align:center;color:var(--muted);cursor:pointer;margin-top:12px;transition:.15s}
.dropzone:hover,.dropzone.drag{border-color:var(--accent);background:#f0f6ff;color:var(--accent)}
.upload-list{margin-top:14px;display:flex;flex-direction:column;gap:10px}
.up-item{border:1px solid var(--border);border-radius:12px;padding:11px 13px}
.up-item .row{display:flex;justify-content:space-between;gap:10px;font-size:13px}
.up-item .name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bar{height:7px;background:#eef1f5;border-radius:7px;margin-top:9px;overflow:hidden}
.bar > i{display:block;height:100%;background:var(--accent);width:0;transition:width .2s}
.up-item.done .bar > i{background:#22c55e}
.up-item.err .bar > i{background:var(--danger)}
.modal-actions{display:flex;justify-content:flex-end;margin-top:18px}

/* ---------- 管理后台 ---------- */
.admin-card{max-width:980px;max-height:90vh;overflow:auto;padding:22px}
.admin-head{display:flex;justify-content:space-between;align-items:center;gap:10px}
.tabs{display:flex;gap:4px;margin:16px 0;border-bottom:1px solid var(--border);overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{background:none;border:none;padding:11px 14px;cursor:pointer;font-size:15px;font-family:inherit;color:var(--muted);border-bottom:2px solid transparent;white-space:nowrap}
.tab.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:600}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
table.tbl{width:100%;border-collapse:collapse;font-size:14px;min-width:560px}
table.tbl th,table.tbl td{border-bottom:1px solid var(--border);padding:10px 8px;text-align:left;vertical-align:middle}
table.tbl th{color:var(--muted);font-weight:500;white-space:nowrap}
.inp{padding:8px 10px;border:1px solid var(--border);border-radius:9px;font-size:13px;font-family:inherit;width:100%;outline:none}
.inp:focus{border-color:var(--accent)}
.thumb-sm{width:44px;height:44px;object-fit:cover;border-radius:9px;background:#eef1f5}
.row-actions{display:flex;gap:6px;flex-wrap:wrap}
.form-row{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:6px 0 18px}
.form-row .inp{width:auto;min-width:130px;flex:1 1 130px}
label.chk{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--muted)}

/* ---------- 查看器 ---------- */
.viewer{background:rgba(6,9,16,.95);flex-direction:column;gap:2px}
.viewer-body{max-width:94vw;max-height:80vh;display:flex;align-items:center;justify-content:center}
.viewer-body img,.viewer-body video{max-width:94vw;max-height:80vh;border-radius:12px;background:#000}
.viewer-close{position:fixed;top:14px;right:16px;background:rgba(255,255,255,.16);border:none;color:#fff;font-size:18px;
  width:42px;height:42px;border-radius:50%;cursor:pointer;z-index:60}
.viewer-meta{color:#cbd5e1;font-size:13px;margin-top:14px;text-align:center;padding:0 16px}
.toast{position:fixed;left:50%;bottom:40px;transform:translateX(-50%);background:rgba(20,25,40,.94);color:#fff;
  padding:11px 20px;border-radius:12px;font-size:14px;z-index:99;max-width:86vw;text-align:center}

/* ---------- 移动端 ---------- */
@media (max-width:760px){
  .grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:9px;padding:12px}
  .card{border-radius:16px;padding:20px}
  .admin-card{max-height:94vh;padding:16px;border-radius:16px}
  .overlay:not(.viewer){align-items:flex-end;padding:0}
  .viewer{align-items:center;padding:16px}
  .modal-card,.admin-card,.card{border-radius:18px 18px 0 0;max-height:94vh}
  #login .card{margin:auto;border-radius:18px}
  #login.overlay{align-items:center;padding:16px}
  .form-row .inp{flex:1 1 100%;min-width:0}
  .form-row .btn{flex:1 1 auto}
  table.tbl{font-size:13px}
  .albumbar{padding:10px 12px 0}
}
@media (min-width:760px){
  #topbar{flex-direction:row;align-items:center;justify-content:space-between}
  .tb-top{width:auto}
  .tb-tools{width:auto;justify-content:flex-end}
  .tb-tools .search{max-width:280px}
}

/* ---------- 管理后台（美化） ---------- */
.m-list{display:flex;flex-direction:column;gap:10px}
.m-row{display:flex;gap:12px;align-items:center;border:1px solid var(--border);border-radius:14px;padding:10px 12px;background:#fff;transition:.15s}
.m-row:hover{border-color:#d6deea;box-shadow:0 6px 18px rgba(22,33,64,.06)}
.m-thumb{width:58px;height:58px;border-radius:11px;object-fit:cover;flex:0 0 auto;background:#eef1f6}
.m-main{flex:1 1 auto;min-width:0}
.m-meta{font-size:12px;color:var(--muted);margin-top:6px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.m-side{display:flex;gap:8px;align-items:center;flex:0 0 auto}
.m-side .inp{min-width:120px;width:auto}

.pill{display:inline-block;padding:3px 9px;border-radius:999px;background:#eef2f8;color:#5b6577;font-size:12px;line-height:1.4}
.pill.blue{background:#e8f0fe;color:#2563eb}
.pill.green{background:#e7f7ee;color:#12805a}
.pill.red{background:#fdecec;color:#d33}
.pill.gray{background:#eef1f6;color:#7b8598}

.a-list{display:flex;flex-direction:column;gap:8px}
.a-row{display:flex;gap:10px;align-items:center;border:1px solid var(--border);border-radius:12px;padding:9px 11px;background:#fff;transition:.15s}
.a-row:hover{border-color:#d6deea}
.a-icon{flex:0 0 auto}
.a-row .inp{width:auto}
.a-row [data-f="name"]{flex:1 1 auto;min-width:120px}
.a-row [data-f="parent_id"]{flex:0 0 150px}

.u-add{background:#f7f9fd;border:1px solid var(--border);border-radius:14px;padding:12px}
.u-list{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}
.u-card{border:1px solid var(--border);border-radius:16px;padding:15px;background:#fff;transition:.15s}
.u-card:hover{box-shadow:0 6px 20px rgba(22,33,64,.07)}
.u-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;font-size:16px}
.u-fields{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.u-fields label{font-size:12px;color:var(--muted);display:flex;flex-direction:column;gap:5px}
.u-perms{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 4px}
.chk-pill{display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border:1px solid var(--border);border-radius:999px;font-size:13px;cursor:pointer;background:#fff;user-select:none}
.chk-pill:hover{border-color:#cdd6e6}
.chk-pill input{accent-color:var(--accent);width:15px;height:15px}
.u-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:12px}

@media (max-width:760px){
  .m-row{flex-wrap:wrap}
  .m-side{flex:1 1 100%;justify-content:flex-end}
  .m-side .inp{flex:1 1 auto}
  .a-row{flex-wrap:wrap}
  .a-row [data-f="name"]{flex:1 1 100%}
  .a-row [data-f="parent_id"]{flex:1 1 auto}
  .u-list{grid-template-columns:1fr}
  .u-fields{grid-template-columns:1fr}
}

/* ---------- 磁盘空间 ---------- */
.disk-cards{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));margin-bottom:6px}
.disk-card{border:1px solid var(--border);border-radius:14px;padding:14px;background:#fff}
.dc-label{font-size:13px;color:var(--muted)}
.dc-big{font-size:22px;font-weight:700;margin:6px 0 10px}
.dc-sub{font-size:12px;color:var(--muted);margin-top:6px}
.disk-h{margin:18px 0 10px;font-size:15px}
.disk-list{display:flex;flex-direction:column;gap:10px}
.disk-row{display:grid;grid-template-columns:minmax(120px,1.2fr) 2fr auto;gap:12px;align-items:center}
.disk-name{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.disk-val{font-size:12px;color:var(--muted);white-space:nowrap;text-align:right}
.bar > i.green{background:#22c55e}
.bar > i.amber{background:#f59e0b}
@media (max-width:760px){
  .disk-row{grid-template-columns:1fr;gap:5px}
  .disk-val{text-align:left}
}

/* ---------- 面包屑 ---------- */
.crumbs{display:flex;align-items:center;gap:8px;padding:12px 18px 0;font-size:14px;flex-wrap:wrap}
.crumb{cursor:pointer;color:var(--muted);padding:3px 2px}
.crumb:hover{color:var(--accent)}
.crumb.active{color:var(--text);font-weight:600;cursor:default}
.crumbs .sep{color:#cbd5e1}

/* ---------- 相册卡片 ---------- */
.card-album{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);cursor:pointer;transition:.18s;border:1px solid var(--border)}
.card-album:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(22,33,64,.14);border-color:#d9e2f0}
.ca-cover{aspect-ratio:16/10;background:#eef2f8;display:flex;align-items:center;justify-content:center;overflow:hidden}
.ca-cover img{width:100%;height:100%;object-fit:cover;display:block}
.ca-folder{font-size:44px}
.ca-body{padding:11px 13px 13px}
.ca-name{font-weight:600;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ca-meta{font-size:12px;color:var(--muted);margin-top:3px}

/* 上传目标 */
.up-to{display:flex;align-items:center;gap:8px;margin-top:12px;font-size:14px;color:var(--muted)}
.up-to .select{flex:1}

/* 权限弹窗 */
.perm-card{max-width:640px;max-height:88vh;overflow:auto}
.perm-tbl td,.perm-tbl th{text-align:center}
.perm-tbl td:first-child,.perm-tbl th:first-child{text-align:left}
.perm-tbl input{width:17px;height:17px;accent-color:var(--accent)}
@media (max-width:760px){
  .grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
  .crumbs{padding:10px 12px 0}
}