:root{
  color-scheme:light;
  --primary:#1f6bff;
  --primary-2:#4b8cff;
  --primary-soft:#e8f0ff;
  --bg:#f2f4f8;
  --card:#ffffff;
  --text:#1b1f27;
  --text-2:#5b6472;
  --text-3:#9aa3b2;
  --line:#eceff5;
  --danger:#f04438;
  --ok:#12b76a;
  --radius:14px;
  --shadow:0 6px 24px rgba(24,39,75,.08);
  --shadow-lg:0 18px 48px rgba(24,39,75,.16);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
button{font:inherit;color:inherit;cursor:pointer;border:none;background:none}
svg{display:block}
a{color:inherit;text-decoration:none}

.layout{display:flex;height:100vh;overflow:hidden}

/* ---------- 侧栏 ---------- */
.sidebar{
  width:236px;flex:0 0 236px;background:var(--card);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:16px 14px;gap:14px;
}
.brand{display:flex;align-items:center;gap:10px;padding:4px 6px 8px}
.brand-logo{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;color:#fff;
  background:linear-gradient(135deg,var(--primary),#6aa4ff);box-shadow:0 6px 16px rgba(31,107,255,.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:16px}
.brand-text span{font-size:11px;color:var(--text-3);letter-spacing:.5px}

.btn-primary{
  display:flex;align-items:center;justify-content:center;gap:8px;width:100%;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;
  padding:11px;border-radius:11px;font-weight:600;
  box-shadow:0 8px 18px rgba(31,107,255,.3);transition:.18s;
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 22px rgba(31,107,255,.4)}

.nav{display:flex;flex-direction:column;gap:2px;margin-top:2px}
.nav-item{
  display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:10px;color:var(--text-2);
  transition:.15s;cursor:pointer;position:relative;
}
.nav-item:hover{background:#f5f8ff;color:var(--primary)}
.nav-item.active{background:var(--primary-soft);color:var(--primary);font-weight:600}
.nav-item.active::before{content:"";position:absolute;left:-14px;top:8px;bottom:8px;width:3px;border-radius:0 3px 3px 0;background:var(--primary)}
.nav-sep{height:1px;background:var(--line);margin:8px 4px}

.quota{margin-top:auto;background:#f7f9fd;border:1px solid var(--line);border-radius:12px;padding:12px}
.quota-head{display:flex;justify-content:space-between;font-size:12px;color:var(--text-2);margin-bottom:8px}
.quota-head b{color:var(--primary)}
.quota-bar{height:6px;border-radius:6px;background:#e4e9f2;overflow:hidden}
.quota-bar i{display:block;height:100%;width:0;border-radius:6px;background:linear-gradient(90deg,var(--primary),#6aa4ff);transition:.4s}
.quota-text{font-size:11px;color:var(--text-3);margin-top:7px}
.quota-note{font-size:10px;color:var(--text-3);margin-top:6px;line-height:1.4}

/* ---------- 主区 ---------- */
.main{flex:1;display:flex;flex-direction:column;min-width:0;padding:14px 18px 0}
.topbar{display:flex;align-items:center;gap:12px}
.nav-arrow button{
  width:34px;height:34px;border-radius:9px;background:var(--card);display:grid;place-items:center;
  color:var(--text-2);box-shadow:var(--shadow);transition:.15s
}
.nav-arrow button:hover:not(:disabled){color:var(--primary)}
.nav-arrow button:disabled{opacity:.4;cursor:default}
.search{
  flex:1;max-width:520px;display:flex;align-items:center;gap:8px;background:var(--card);
  border-radius:11px;padding:0 14px;height:40px;box-shadow:var(--shadow);color:var(--text-3)
}
.search input{flex:1;border:none;outline:none;background:none;font-size:14px;color:var(--text)}
.top-actions{display:flex;gap:10px;margin-left:auto}
.tb-btn{
  display:flex;align-items:center;gap:7px;height:40px;padding:0 15px;border-radius:11px;
  background:var(--card);color:var(--text-2);box-shadow:var(--shadow);transition:.15s;font-weight:500
}
.tb-btn:hover{color:var(--primary);transform:translateY(-1px)}
.tb-btn.primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 8px 18px rgba(31,107,255,.3)}
.tb-btn.primary:hover{color:#fff}

.crumb-row{display:flex;align-items:center;gap:12px;margin:16px 2px 12px;min-height:30px}
.crumb{display:flex;align-items:center;gap:6px;flex-wrap:wrap;font-size:14px;color:var(--text-2)}
.crumb b{color:var(--text);font-weight:600}
.crumb a{cursor:pointer;padding:3px 6px;border-radius:6px}
.crumb a:hover{background:#e9eefb;color:var(--primary)}
.crumb .sep{color:var(--text-3)}
.toolbar{display:flex;align-items:center;gap:8px;margin-left:auto}
.ic-btn{display:flex;align-items:center;gap:6px;height:32px;padding:0 10px;border-radius:9px;color:var(--text-2);background:var(--card);box-shadow:var(--shadow)}
.ic-btn:hover{color:var(--primary)}
.ic-btn.active{color:var(--primary);background:var(--primary-soft)}
.seg{display:flex;background:var(--card);border-radius:9px;box-shadow:var(--shadow);overflow:hidden}
.seg-btn{width:36px;height:32px;display:grid;place-items:center;color:var(--text-3)}
.seg-btn.active{background:var(--primary-soft);color:var(--primary)}

.content{flex:1;overflow:auto;padding-bottom:56px}
.hint{text-align:center;color:var(--text-3);font-size:12px;padding:10px 0 14px}

/* ---------- 网格 ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px;padding:2px}
.card{
  background:var(--card);border-radius:var(--radius);padding:14px 12px 12px;text-align:center;
  border:1.5px solid transparent;box-shadow:0 2px 10px rgba(24,39,75,.05);transition:.16s;cursor:pointer;position:relative;user-select:none
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#dbe6ff}
.card.selected{border-color:var(--primary);background:var(--primary-soft)}
.card .thumb{
  height:84px;border-radius:10px;margin-bottom:10px;display:grid;place-items:center;overflow:hidden;
  background:linear-gradient(135deg,#f7f9ff,#eef3ff);color:var(--primary)
}
.card .thumb img{width:100%;height:100%;object-fit:cover}
.card .cardname{font-size:13px;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:500}
.card .cardmeta{font-size:11px;color:var(--text-3);margin-top:3px;height:15px}
.card .chk{
  position:absolute;top:8px;left:8px;width:20px;height:20px;border-radius:6px;border:1.5px solid #d3dae6;
  background:#fff;display:none;place-items:center;color:#fff
}
.card:hover .chk,.grid.select-mode .chk{display:grid}
.card .chk.on{background:var(--primary);border-color:var(--primary);display:grid}
.badge-share{position:absolute;top:8px;right:8px;background:rgba(31,107,255,.12);color:var(--primary);border-radius:6px;font-size:10px;padding:2px 6px}

/* ---------- 列表 ---------- */
.list{background:var(--card);border-radius:var(--radius);box-shadow:0 2px 10px rgba(24,39,75,.05);overflow:hidden}
.row{display:flex;align-items:center;gap:12px;padding:11px 16px;border-bottom:1px solid var(--line);cursor:pointer;transition:.12s}
.row:last-child{border-bottom:none}
.row:hover{background:#f7faff}
.row.selected{background:var(--primary-soft)}
.row .chk{width:19px;height:19px;border-radius:6px;border:1.5px solid #d3dae6;background:#fff;flex:0 0 auto;display:grid;place-items:center;color:#fff}
.row .chk.on{background:var(--primary);border-color:var(--primary)}
.row .ricon{width:30px;height:30px;flex:0 0 auto;display:grid;place-items:center;color:var(--primary)}
.row .rname{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:500}
.row .rsize{width:90px;color:var(--text-3);font-size:12px;text-align:right}
.row .rtime{width:150px;color:var(--text-3);font-size:12px}

/* ---------- 空态 ---------- */
.empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-3);gap:12px;padding:60px 0}
.empty-art{font-size:56px;opacity:.55}
.empty p{margin:0;font-size:14px}

/* ---------- 多选条 ---------- */
.selbar{
  position:fixed;left:50%;bottom:26px;transform:translateX(-50%);z-index:60;
  display:flex;align-items:center;gap:8px;background:rgba(27,31,39,.94);color:#fff;
  padding:9px 12px 9px 18px;border-radius:14px;box-shadow:var(--shadow-lg);backdrop-filter:blur(8px)
}
.selbar span{font-size:13px;margin-right:6px;color:#cfd6e4}
.selbar button{padding:7px 13px;border-radius:9px;background:rgba(255,255,255,.12);color:#fff;font-size:13px;transition:.15s}
.selbar button:hover{background:rgba(255,255,255,.22)}
.selbar button.danger{background:var(--danger)}
.selbar button.ghost{background:transparent;color:#aab3c2}

/* ---------- 上传面板 ---------- */
.upload-panel{
  position:fixed;right:24px;bottom:24px;width:380px;max-height:60vh;z-index:70;
  background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-lg);display:flex;flex-direction:column;overflow:hidden
}
.up-head{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--line);font-weight:600}
.up-head-btns{display:flex;gap:6px}
.up-head-btns button{font-size:13px;color:var(--text-3);padding:3px 8px;border-radius:7px}
.up-head-btns button:hover{background:#f0f3f9;color:var(--text)}
.up-list{overflow:auto;padding:6px 0}
.dl-panel{left:256px;right:auto;bottom:24px;width:400px}
.up-item{display:flex;align-items:center;gap:10px;padding:9px 14px}
.up-item .uname{flex:1;min-width:0;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.up-item .upct{font-size:12px;color:var(--text-3);flex:0 0 auto}
.up-prog{height:4px;border-radius:4px;background:#eef1f7;overflow:hidden;margin-top:5px}
.up-prog i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--primary),#6aa4ff);transition:.2s}
.up-item .ust{margin-top:3px;font-size:11px;color:var(--text-3)}
.up-col{flex:1;min-width:0}
.up-item.ok .upct{color:var(--ok)}
.up-item.err .upct{color:var(--danger)}
.dot{width:8px;height:8px;border-radius:50%;background:var(--primary);flex:0 0 auto}

/* ---------- 右键菜单 ---------- */
.ctx{
  position:fixed;z-index:90;background:var(--card);border-radius:12px;box-shadow:var(--shadow-lg);
  padding:6px;min-width:172px;border:1px solid var(--line)
}
.ctx button{display:flex;align-items:center;gap:10px;width:100%;padding:9px 12px;border-radius:8px;color:var(--text-2);font-size:13px;text-align:left}
.ctx button:hover{background:var(--primary-soft);color:var(--primary)}
.ctx button.danger:hover{background:#feeceb;color:var(--danger)}
.ctx .sep{height:1px;background:var(--line);margin:5px 8px}

/* ---------- 弹窗 ---------- */
.modal{position:fixed;inset:0;z-index:100;background:rgba(15,20,32,.55);display:flex;align-items:center;justify-content:center;padding:32px;backdrop-filter:blur(3px)}
.modal-card{background:var(--card);border-radius:18px;box-shadow:var(--shadow-lg);max-width:min(920px,92vw);max-height:88vh;width:auto;overflow:auto;position:relative}
.mc-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line);gap:16px}
.mc-head b{font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mc-close{width:32px;height:32px;border-radius:9px;display:grid;place-items:center;color:var(--text-3);font-size:20px}
.mc-close:hover{background:#f0f3f9;color:var(--text)}
.mc-body{padding:20px}
.mc-body input,.mc-body select{
  width:100%;height:42px;border:1.5px solid var(--line);border-radius:11px;padding:0 12px;font-size:14px;outline:none;color:var(--text);background:#fbfcfe
}
.mc-body input:focus,.mc-body select:focus{border-color:var(--primary);background:#fff}
.mc-body label{display:block;font-size:13px;color:var(--text-2);margin:0 0 7px}
.mc-body .fld{margin-bottom:16px}
.mc-foot{display:flex;justify-content:flex-end;gap:10px;padding:0 20px 20px}
.mc-btn{padding:10px 20px;border-radius:11px;background:#f0f3f9;color:var(--text-2);font-weight:500}
.mc-btn:hover{background:#e6ebf5}
.mc-btn.primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 8px 18px rgba(31,107,255,.3)}
.mc-btn.primary:hover{color:#fff}
.preview-wrap{background:#0d1117;display:grid;place-items:center;min-height:320px;border-radius:0 0 18px 18px;overflow:hidden}
.preview-wrap img,.preview-wrap video{max-width:86vw;max-height:74vh;display:block}
.preview-wrap audio{width:60vw;max-width:640px;margin:60px}
.preview-wrap iframe{width:86vw;height:74vh;border:none;background:#fff}
.preview-wrap pre{color:#d7e0ee;background:#0d1117;padding:24px;margin:0;max-height:70vh;overflow:auto;font:13px/1.6 ui-monospace,Consolas,monospace;width:86vw;white-space:pre-wrap;word-break:break-word}

.link-row{display:flex;gap:8px;align-items:center;background:#f7f9fd;border:1.5px solid var(--line);border-radius:11px;padding:8px 10px}
.link-row input{border:none;background:none;flex:1;height:auto;font-size:13px;color:var(--text-2)}

/* ---------- Toast ---------- */
.toasts{position:fixed;top:20px;left:50%;transform:translateX(-50%);z-index:120;display:flex;flex-direction:column;gap:8px;align-items:center}
.toast{background:rgba(27,31,39,.94);color:#fff;padding:10px 18px;border-radius:11px;font-size:13px;box-shadow:var(--shadow-lg);animation:tin .2s}
.toast.ok{background:rgba(18,183,106,.96)}
.toast.err{background:rgba(240,68,56,.96)}
@keyframes tin{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}

.drop-mask{position:fixed;inset:0;z-index:110;background:rgba(31,107,255,.1);border:3px dashed var(--primary);display:grid;place-items:center;pointer-events:none}
.drop-mask span{background:#fff;padding:16px 28px;border-radius:14px;color:var(--primary);font-weight:600;box-shadow:var(--shadow-lg)}

/* 滚动条 */
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:#d5dbe7;border-radius:8px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:#bcc6d6;background-clip:content-box}

@media(max-width:820px){
  .sidebar{display:none}
  .top-actions .tb-btn span{display:none}
  .row .rtime{display:none}
  .upload-panel{width:calc(100vw - 32px);right:16px}
  .dl-panel{left:16px;right:auto;width:calc(100vw - 32px)}
}