:root{
  --bg:#0f1220; --panel:#171b2e; --panel2:#1e2337; --line:#2a3050;
  --txt:#e6e9f5; --sub:#9aa3c7; --brand:#5b8cff; --brand2:#7aa2ff;
  --danger:#ff5c6c; --ok:#37d39b; --shadow:0 8px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--txt);font-size:14px}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}

/* ---------- 登录 ---------- */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;
  background:radial-gradient(1200px 600px at 50% -10%,#243056,#0f1220)}
.login-card{width:360px;background:var(--panel);border:1px solid var(--line);
  border-radius:18px;padding:34px 30px;box-shadow:var(--shadow)}
.login-logo{text-align:center;margin-bottom:22px}
.logo-badge{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;
  border-radius:16px;background:linear-gradient(135deg,var(--brand),#8a6cff);font-size:28px;
  box-shadow:0 6px 18px rgba(91,140,255,.4)}
.logo-badge.sm{width:30px;height:30px;font-size:17px;border-radius:9px}
.login-logo h1{font-size:20px;margin:14px 0 4px}
.login-logo .sub{color:var(--sub);font-size:12px;margin:0}
.login-form label{display:block;font-size:12px;color:var(--sub);margin-bottom:14px}
.login-form input{width:100%;margin-top:6px;padding:11px 12px;border-radius:10px;
  border:1px solid var(--line);background:var(--panel2);color:var(--txt);font-size:14px;outline:none}
.login-form input:focus{border-color:var(--brand)}
.btn-primary{width:100%;padding:11px;border:none;border-radius:10px;color:#fff;font-size:15px;
  background:linear-gradient(135deg,var(--brand),#8a6cff);letter-spacing:2px;margin-top:6px}
.btn-primary:hover{filter:brightness(1.08)}
.alert{background:rgba(255,92,108,.15);border:1px solid var(--danger);color:#ffd0d5;
  padding:9px 12px;border-radius:9px;font-size:13px;margin-bottom:14px;text-align:center}
.login-foot{text-align:center;color:var(--sub);font-size:11px;margin-top:20px}

/* ---------- 布局 ---------- */
.app{display:flex;height:100vh;overflow:hidden}
.sidebar{width:230px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:18px 14px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:15px;padding:4px 6px 16px}
.side-nav .nav-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:var(--sub)}
.side-nav .nav-item.active,.side-nav .nav-item:hover{background:var(--panel2);color:var(--txt)}
.stats{margin-top:auto;background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:14px}
.stat-title{font-size:12px;color:var(--sub);margin-bottom:8px}
.stat-bar{height:8px;border-radius:6px;background:#0c0f1d;overflow:hidden}
.stat-fill{height:100%;width:0;background:linear-gradient(90deg,var(--brand),#8a6cff);transition:width .5s}
.stat-text{font-size:12px;margin-top:8px;color:var(--txt)}
.stat-detail{font-size:11px;color:var(--sub);margin-top:3px}
.side-foot{display:flex;justify-content:space-between;align-items:center;margin-top:14px;
  font-size:12px;color:var(--sub);padding:0 4px}
.logout{color:var(--danger)}

.main{flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{display:flex;align-items:center;gap:16px;padding:16px 22px;border-bottom:1px solid var(--line)}
.crumbs{flex:1;display:flex;flex-wrap:wrap;align-items:center;gap:4px;font-size:14px;min-width:0}
.crumbs a{padding:3px 8px;border-radius:7px;color:var(--sub)}
.crumbs a:hover{background:var(--panel2);color:var(--txt)}
.crumbs a.cur{color:var(--txt);font-weight:600}
.crumbs .sep{color:var(--sub);opacity:.5}

.path-bar{display:flex;align-items:center;gap:10px;padding:10px 22px;
  background:var(--panel);border-bottom:1px solid var(--line);min-height:36px}
.path-icon{font-size:16px;flex-shrink:0;opacity:.85}
.path-text{font-size:15px;font-weight:600;color:var(--txt);letter-spacing:.2px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.path-text .seg{color:var(--sub);font-weight:400;margin:0 4px;opacity:.6}
.path-text .cur{color:var(--brand);font-weight:700}
.search-box input{width:240px;padding:9px 12px;border-radius:10px;border:1px solid var(--line);
  background:var(--panel);color:var(--txt);outline:none}
.search-box input:focus{border-color:var(--brand);width:280px}

.toolbar{display:flex;align-items:center;gap:8px;padding:12px 22px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.btn{padding:8px 13px;border-radius:9px;border:1px solid var(--line);background:var(--panel);color:var(--txt);font-size:13px}
.btn:hover:not(:disabled){background:var(--panel2);border-color:var(--brand)}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn.danger:hover:not(:disabled){border-color:var(--danger);color:var(--danger)}
.tool-sep{width:1px;height:20px;background:var(--line);margin:0 4px}
.sel-info{font-size:12px;color:var(--sub);margin-left:6px}
.view-toggle{margin-left:auto;display:flex;gap:4px}
.vt{width:32px;height:32px;border-radius:8px;border:1px solid var(--line);background:var(--panel);color:var(--sub)}
.vt.active{background:var(--brand);color:#fff;border-color:var(--brand)}

.dropzone{flex:1;overflow:auto;padding:8px 14px 40px;position:relative}
.dropzone.dragover{outline:2px dashed var(--brand);outline-offset:-14px;background:rgba(91,140,255,.05)}
.drop-hint{display:none;position:sticky;top:8px;text-align:center;color:var(--brand);
  background:rgba(91,140,255,.1);border:1px dashed var(--brand);border-radius:10px;padding:10px;margin:8px}
.dropzone.dragover .drop-hint{display:block}
.empty{text-align:center;color:var(--sub);padding:60px 0}

/* 列表视图 */
.filelist{display:flex;flex-direction:column}
.row{display:grid;grid-template-columns:26px 1fr 120px 150px 90px;align-items:center;gap:10px;
  padding:9px 12px;border-radius:9px;cursor:default}
.row:hover{background:var(--panel2)}
.row.head{color:var(--sub);font-size:12px;position:sticky;top:0;background:var(--bg);z-index:2;cursor:default}
.row.head:hover{background:var(--bg)}
.row .chk{width:16px;height:16px;accent-color:var(--brand)}
.row .fn{display:flex;align-items:center;gap:10px;min-width:0}
.row .fn .ic{font-size:18px;width:22px;text-align:center;flex-shrink:0}
.row .fn .nm{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.row .fn .nm.link{cursor:pointer}
.row .fn .nm.link:hover{color:var(--brand2)}
.row .sz,.row .mt{color:var(--sub);font-size:12.5px}
.row .act{display:flex;gap:6px;justify-content:flex-end;opacity:0;transition:.15s}
.row:hover .act{opacity:1}
.row .act button{border:none;background:transparent;color:var(--sub);font-size:15px;padding:2px 4px;border-radius:6px}
.row .act button:hover{background:var(--line);color:var(--txt)}

/* 网格视图 */
.filelist.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px;padding:10px}
.filelist.grid .row.head{display:none}
.filelist.grid .row{grid-template-columns:none;display:flex;flex-direction:column;align-items:center;
  text-align:center;padding:16px 10px;border:1px solid transparent;cursor:pointer;position:relative}
.filelist.grid .row:hover{border-color:var(--line)}
.filelist.grid .fn{flex-direction:column;gap:8px}
.filelist.grid .fn .ic{font-size:40px;width:auto}
.filelist.grid .fn .nm{max-width:120px;display:block}
.filelist.grid .sz,.filelist.grid .mt{font-size:11px}
.filelist.grid .mt{display:none}
.filelist.grid .chk{position:static;margin-bottom:6px;order:0}
.filelist.grid .act{opacity:1;margin-top:6px;position:relative;z-index:2}

/* 上传面板 */
.btn.off{opacity:.38;filter:grayscale(.65)}
.upload-panel{position:fixed;right:22px;bottom:22px;width:320px;background:var(--panel);
  border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);z-index:50;overflow:hidden}
.up-head{display:flex;justify-content:space-between;padding:12px 14px;background:var(--panel2);font-size:13px}
.up-head span:last-child{cursor:pointer;color:var(--sub)}
.up-body{max-height:260px;overflow:auto}
.up-item{padding:10px 14px;border-top:1px solid var(--line);font-size:12px}
.up-item .nm{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.up-item .pbar{height:5px;border-radius:4px;background:#0c0f1d;margin-top:6px;overflow:hidden}
.up-item .pfill{height:100%;width:0;background:var(--brand);transition:width .2s}
.up-item.done .pfill{background:var(--ok)}
.up-item.err .pfill{background:var(--danger)}
.up-item .meta{display:flex;justify-content:space-between;gap:8px;margin-top:6px;
  color:var(--sub);font-size:11px;font-variant-numeric:tabular-nums;line-height:1.3}
.up-item .meta .pct{color:var(--brand);font-weight:600;white-space:nowrap}
.up-item .meta .spd{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-align:right}
.up-item.done .meta .pct{color:var(--ok)}
.up-item.err .meta .pct{color:var(--danger)}

/* 弹窗 */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;z-index:100}
.modal-box{width:80%;max-width:900px;max-height:85vh;background:var(--panel);border:1px solid var(--line);
  border-radius:14px;display:flex;flex-direction:column;box-shadow:var(--shadow)}
.modal-box.sm{width:420px}
.modal-head{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;border-bottom:1px solid var(--line)}
.modal-close{cursor:pointer;color:var(--sub);font-size:18px}
.modal-body{padding:18px;overflow:auto}
.modal-body img{max-width:100%;border-radius:8px;display:block;margin:0 auto}
.modal-body pre{white-space:pre-wrap;word-break:break-all;font-family:ui-monospace,Consolas,monospace;
  font-size:13px;line-height:1.6;background:var(--panel2);padding:14px;border-radius:8px;margin:0}
.modal-foot{display:flex;justify-content:space-between;align-items:center;padding:12px 18px;border-top:1px solid var(--line)}
.move-tree{max-height:340px;overflow:auto}
.move-node{padding:8px 10px;border-radius:8px;cursor:pointer;display:flex;align-items:center;gap:8px}
.move-node:hover{background:var(--panel2)}
.move-node.sel{background:rgba(91,140,255,.18);color:var(--brand2)}
.move-target{font-size:12px;color:var(--sub)}

/* Toast */
.toast{position:fixed;left:50%;bottom:34px;transform:translateX(-50%) translateY(20px);
  background:var(--panel2);border:1px solid var(--line);color:var(--txt);padding:11px 20px;border-radius:10px;
  box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.25s;z-index:200;font-size:13.5px}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.ok{border-color:var(--ok)} .toast.err{border-color:var(--danger)}

@media(max-width:760px){
  .sidebar{display:none}
  .search-box input{width:130px}
  .row{grid-template-columns:22px 1fr 70px}
  .row .mt{display:none}
}

/* ============ 预览面板（office / pdf / 图片）============ */
#previewBody{max-height:70vh;overflow:auto;background:#0e1117;padding:18px;border-radius:0 0 14px 14px}
#previewBody img{display:block;max-width:100%;margin:auto;background:#fff;border-radius:6px}
#previewBody pre.text-preview{white-space:pre-wrap;word-break:break-word;font-family:ui-monospace,Menlo,Consolas,monospace;color:#e6e6e6;font-size:13px;line-height:1.55;padding:14px;background:#1a1d24;border-radius:8px;max-height:65vh;overflow:auto}
.preview-loading{color:#9aa3b2;text-align:center;padding:60px 20px;font-size:14px}
.preview-err{color:#ff8a8a;text-align:center;padding:60px 20px;font-size:14px;background:rgba(255,80,80,.08);border-radius:8px;margin:20px}
.preview-pages{display:flex;flex-direction:column;gap:24px;align-items:center;max-width:1100px;margin:0 auto}
.preview-page-card{background:#fff;padding:14px;border-radius:10px;box-shadow:0 6px 24px rgba(0,0,0,.35);width:100%;max-width:980px}
.preview-page-num{color:#333;font-size:13px;text-align:center;margin-bottom:10px;font-weight:500;letter-spacing:.5px}
.preview-page-img{display:block;width:100%;height:auto;border-radius:4px}

/* ═══════════════ 文件分享 ═══════════════ */
.share-item {
  background: #f6f7fb; border: 1px solid #e5e7ef; border-radius: 10px;
  padding: 12px 14px; font-size: 14px; color: #333; margin-bottom: 16px;
  word-break: break-all;
}
.share-field { margin-bottom: 14px; }
.share-field label {
  display: block; font-size: 12px; color: #888; margin-bottom: 6px;
}
.share-field select, .share-field input {
  width: 100%; padding: 10px 12px; border: 1px solid #e2e5ef;
  border-radius: 8px; font-size: 14px; outline: none; background: #fff;
  box-sizing: border-box;
}
.share-field select:focus, .share-field input:focus { border-color: #667eea; }

.share-result-link {
  background: #f0f2ff; border: 1px dashed #9aa5ff; border-radius: 10px;
  padding: 14px; font-size: 13px; color: #4a56c9; word-break: break-all;
  margin-bottom: 10px; user-select: all;
}
.share-result-meta { font-size: 12px; color: #999; }

.shares-list { max-height: 56vh; overflow-y: auto; }
.shares-empty {
  text-align: center; color: #999; padding: 40px 0; font-size: 14px;
}
.share-card {
  border: 1px solid #e5e7ef; border-radius: 10px; padding: 12px 14px;
  margin-bottom: 10px; background: #fff;
}
.share-card.invalid { opacity: .55; }
.share-card-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 4px;
}
.share-card-name {
  font-size: 14px; font-weight: 600; color: #333; word-break: break-all;
  margin-right: 10px;
}
.share-card-status {
  font-size: 11px; padding: 2px 8px; border-radius: 10px; flex-shrink: 0;
  background: #e8f9ef; color: #1a9e55;
}
.share-card.invalid .share-card-status { background: #f3f4f6; color: #999; }
.share-card-meta { font-size: 12px; color: #888; margin-bottom: 4px; }
.share-card-url {
  font-size: 12px; color: #667eea; word-break: break-all;
  margin-bottom: 10px; user-select: all;
}
.share-card-ops { display: flex; gap: 8px; }
.btn.sm {
  padding: 5px 12px; font-size: 12px; border-radius: 6px;
}

/* ===== 分享下载统计 ===== */
.share-card-stats { display: flex; align-items: center; gap: 10px; margin: 6px 0 4px; flex-wrap: wrap; }
.dl-badge {
  display: inline-flex; align-items: center; gap: 4px;
  background: #eef2ff; color: #4f46e5; border: 1px solid #c7d2fe;
  border-radius: 20px; padding: 3px 12px; font-size: 12px; font-weight: 600;
}
.dl-badge b { font-size: 14px; }
.dl-badge.hot { background: #fff1f2; color: #e11d48; border-color: #fecdd3; }
.dl-last { font-size: 12px; color: #9ca3af; }

.stats-summary { display: flex; gap: 10px; margin-bottom: 14px; }
.stats-kpi {
  flex: 1; background: #f8fafc; border: 1px solid #e5e7eb; border-radius: 10px;
  padding: 12px 8px; text-align: center;
}
.stats-kpi .kpi-num { font-size: 22px; font-weight: 700; color: #4f46e5; line-height: 1.2; }
.stats-kpi .kpi-num.sm { font-size: 13px; padding-top: 5px; }
.stats-kpi .kpi-label { font-size: 11px; color: #9ca3af; margin-top: 2px; }
.stats-path {
  font-size: 12px; color: #6b7280; background: #f9fafb; border-radius: 8px;
  padding: 7px 10px; margin-bottom: 14px; word-break: break-all;
}
.stats-sec { font-size: 13px; font-weight: 600; color: #374151; margin: 14px 0 6px; }
.stats-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.stats-table th {
  text-align: left; color: #9ca3af; font-weight: 600; padding: 6px 8px;
  border-bottom: 1px solid #e5e7eb; background: #f9fafb;
}
.stats-table td { padding: 6px 8px; border-bottom: 1px solid #f3f4f6; color: #4b5563; }
.stats-table td.nm { word-break: break-all; }
.stats-table td.ct { text-align: right; font-weight: 700; color: #4f46e5; }
.stats-table td.tm { white-space: nowrap; color: #6b7280; }
.stats-table td.ip { font-family: ui-monospace, Consolas, monospace; font-size: 11px; }
.tag { display: inline-block; border-radius: 4px; padding: 1px 6px; font-size: 11px; }
.tag.range { background: #fffbeb; color: #b45309; }
.tag.full { background: #ecfdf5; color: #047857; }

/* 文件行下载次数徽章 */
.filelist .row .dl { width: 56px; flex-shrink: 0; color: #9ca3af; font-size: 12px; }
.filelist .row .dl-chip {
  width: 56px; flex-shrink: 0; display: inline-flex; align-items: center; gap: 2px;
  font-size: 12px; color: #4f46e5; background: #eef2ff;
  border-radius: 10px; padding: 2px 8px; margin-right: 4px;
  border: 1px solid #c7d2fe; font-weight: 600;
}
.filelist .row .dl-chip .ic-dl { font-size: 11px; }
.filelist .row .dl-chip.empty { background: transparent; border: none; padding: 0; }
.filelist.grid .row .dl-chip {
  position: absolute; left: 8px; top: 8px; width: auto;
  font-size: 11px; padding: 1px 7px;
}