[data-ui=v2]{--nk-bg: #f4f7f5;--nk-surface: #ffffff;--nk-surface-muted: #eef3f0;--nk-border: #d7e0db;--nk-text: #14241c;--nk-text-muted: #5b6b63;--nk-accent: #1b4834;--nk-accent-soft: #e5f0ea;--nk-accent-hover: #143628;--nk-danger: #b42318;--nk-radius-sm: 8px;--nk-radius-md: 12px;--nk-radius-lg: 16px;--nk-space-1: 4px;--nk-space-2: 8px;--nk-space-3: 12px;--nk-space-4: 16px;--nk-space-5: 24px;--nk-space-6: 32px;--nk-font-xs: 12px;--nk-font-sm: 13px;--nk-font-md: 15px;--nk-font-lg: 18px;--nk-font-xl: 24px;--nk-shell-width: 220px;--nk-topbar-height: 56px;--nk-shadow: 0 1px 0 rgba(20, 36, 28, .04);color:var(--nk-text);background:var(--nk-bg);font-family:Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif}[data-ui=v2] .main-content{background:var(--nk-bg);color:var(--nk-text)}[data-ui=v2].app-container{display:block;height:100vh;height:100dvh;overflow:hidden;background:var(--nk-bg)}html:has([data-ui=v2]){overflow:hidden;height:100%}html:has([data-ui=v2]) body{overflow:hidden;height:100%}[data-ui=v2] .nk-shell{height:100%;display:flex;flex-direction:column;overflow:hidden}[data-ui=v2] .nk-topbar{display:none;height:var(--nk-topbar-height);align-items:center;justify-content:space-between;padding:0 var(--nk-space-4);background:var(--nk-surface);border-bottom:1px solid var(--nk-border);position:sticky;top:0;z-index:70}[data-ui=v2] .nk-topbar__brand{display:flex;align-items:center;gap:var(--nk-space-2);font-weight:700;font-size:var(--nk-font-md);color:var(--nk-text);text-decoration:none}[data-ui=v2] .nk-topbar__brand img{width:28px;height:28px}[data-ui=v2] .nk-topbar__menu{width:40px;height:40px;border:1px solid var(--nk-border);border-radius:var(--nk-radius-sm);background:var(--nk-surface);color:var(--nk-text);display:inline-flex;align-items:center;justify-content:center;cursor:pointer}[data-ui=v2] .nk-shell__body{display:flex;flex:1;min-height:0;overflow:hidden}[data-ui=v2] .nk-sidenav{width:var(--nk-shell-width);flex-shrink:0;align-self:stretch;height:auto;max-height:100%;background:var(--nk-surface);border-right:1px solid var(--nk-border);padding:var(--nk-space-5) var(--nk-space-3);display:flex;flex-direction:column;gap:var(--nk-space-4);box-sizing:border-box;overflow-y:auto}[data-ui=v2] .nk-sidenav__brand{display:flex;flex-direction:column;align-items:center;gap:var(--nk-space-2);text-align:center;margin-bottom:var(--nk-space-2)}[data-ui=v2] .nk-sidenav__brand img{width:44px;height:44px}[data-ui=v2] .nk-sidenav__brand-text{font-weight:700;font-size:var(--nk-font-lg)}[data-ui=v2] .nk-nav{display:flex;flex-direction:column;gap:var(--nk-space-1);flex:1}[data-ui=v2] .nk-nav__link{display:flex;align-items:center;gap:var(--nk-space-3);padding:12px 10px;border-radius:var(--nk-radius-sm);color:var(--nk-text-muted);text-decoration:none;font-size:var(--nk-font-md);font-weight:500}[data-ui=v2] .nk-nav__link:hover{background:var(--nk-surface-muted);color:var(--nk-text)}[data-ui=v2] .nk-nav__link.active{background:var(--nk-accent-soft);color:var(--nk-accent)}[data-ui=v2] .nk-shell__main{flex:1;min-width:0;min-height:0;overflow-x:hidden;overflow-y:auto}[data-ui=v2] .nk-shell__main>.main-content{width:100%;box-sizing:border-box;padding:var(--nk-space-5);max-width:1200px;margin:0 auto;overflow:visible;height:auto}[data-ui=v2] .nk-sidenav__footer{display:flex;flex-direction:column;gap:var(--nk-space-3);margin-top:auto;padding-top:var(--nk-space-4);border-top:1px solid var(--nk-border)}[data-ui=v2] .nk-lang{display:flex;width:100%}[data-ui=v2] .nk-lang button{flex:1;border:1px solid var(--nk-border);background:var(--nk-surface);color:var(--nk-text-muted);padding:8px;cursor:pointer;font-size:var(--nk-font-sm)}[data-ui=v2] .nk-lang button:first-child{border-radius:var(--nk-radius-sm) 0 0 var(--nk-radius-sm)}[data-ui=v2] .nk-lang button:last-child{border-radius:0 var(--nk-radius-sm) var(--nk-radius-sm) 0;border-left:none}[data-ui=v2] .nk-lang button.active{background:var(--nk-accent);border-color:var(--nk-accent);color:#fff}[data-ui=v2] .nk-github{color:var(--nk-text-muted);font-size:20px;align-self:center}[data-ui=v2] .nk-drawer-root{display:none}[data-ui=v2] .nk-version-switch{display:flex;flex-direction:column;gap:var(--nk-space-2)}[data-ui=v2] .nk-version-switch__current{margin:0;font-size:var(--nk-font-xs);color:var(--nk-text-muted)}[data-ui=v2] .nk-version-switch__btn{border:1px solid var(--nk-border);background:var(--nk-surface);color:var(--nk-accent);border-radius:var(--nk-radius-sm);padding:8px 10px;cursor:pointer;font-size:var(--nk-font-sm);font-weight:600}[data-ui=v2] .nk-version-switch__btn:hover{background:var(--nk-accent-soft)}[data-ui=v2] .nk-version-switch__meta{display:none}[data-ui=v2] .nk-settings-version{background:var(--nk-surface);border:1px solid var(--nk-border);border-radius:var(--nk-radius-md);padding:var(--nk-space-5);margin-bottom:var(--nk-space-5)}[data-ui=v2] .nk-settings-version h2{margin:0 0 var(--nk-space-2);font-size:var(--nk-font-lg)}[data-ui=v2] .nk-settings-version p{margin:0 0 var(--nk-space-4);color:var(--nk-text-muted);font-size:var(--nk-font-sm)}@media (max-width: 1199px),(hover: none) and (pointer: coarse){[data-ui=v2] .nk-topbar{display:flex}[data-ui=v2] .nk-sidenav{display:none!important}[data-ui=v2] .nk-drawer-root{display:block}[data-ui=v2] .nk-drawer-overlay{position:fixed;top:var(--nk-topbar-height);left:0;right:0;bottom:0;background:#14241c66;z-index:50;opacity:0;pointer-events:none;transition:opacity .2s ease}[data-ui=v2] .nk-drawer-overlay.open{opacity:1;pointer-events:auto}[data-ui=v2] .nk-drawer{position:fixed;top:var(--nk-topbar-height);left:0;bottom:0;width:min(86vw,300px);background:var(--nk-surface);z-index:60;transform:translate(-105%);transition:transform .22s ease;padding:var(--nk-space-4);display:flex;flex-direction:column;gap:var(--nk-space-3);box-sizing:border-box;overflow-y:auto;-webkit-overflow-scrolling:touch}[data-ui=v2] .nk-drawer.open{transform:translate(0)}[data-ui=v2] .nk-drawer .nk-nav{flex:1 1 auto;min-height:0}[data-ui=v2] .nk-shell.is-drawer-open .nk-shell__main{overflow:hidden;overscroll-behavior:none;touch-action:none}[data-ui=v2] .nk-shell__main>.main-content{padding:var(--nk-space-4)}}@media (min-width: 768px){[data-ui=v2] .nk-shell__body{min-height:0}}[data-ui=v2] .page-header h1,[data-ui=v2] .main-content>h1,[data-ui=v2] .dashboard-header h1{font-size:var(--nk-font-xl);letter-spacing:-.02em;color:var(--nk-text)}[data-ui=v2] .upload-zone{background:var(--nk-surface);border:1px dashed var(--nk-border);border-radius:var(--nk-radius-lg);padding:var(--nk-space-5);box-shadow:var(--nk-shadow);text-align:center}[data-ui=v2] .upload-button,[data-ui=v2] .nk-empty__btn{background:var(--nk-accent);border-color:var(--nk-accent);color:#fff;border-radius:var(--nk-radius-sm);font-weight:600}[data-ui=v2] .upload-button:hover,[data-ui=v2] .nk-empty__btn:hover{background:var(--nk-accent-hover)}[data-ui=v2] .stats-grid,[data-ui=v2] .dashboard-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--nk-space-3)}[data-ui=v2] .dashboard-grid{grid-template-columns:repeat(auto-fit,minmax(min(280px,100%),1fr))}[data-ui=v2] .chart-body{margin-left:0}[data-ui=v2] .stat-card,[data-ui=v2] .chart-card,[data-ui=v2] .book-card,[data-ui=v2] .highlight-list-item,[data-ui=v2] .highlight-card{border-radius:var(--nk-radius-md);border-color:var(--nk-border);background:var(--nk-surface)}[data-ui=v2] .page-header{gap:var(--nk-space-3);align-items:flex-start}[data-ui=v2] .actions{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0;width:100%;max-width:100%;box-sizing:border-box}[data-ui=v2] .search-bar{flex:1 1 180px;min-width:0;box-sizing:border-box}[data-ui=v2] .search-bar input{width:100%;min-width:0}[data-ui=v2] .page-header.nk-toolbar-sticky,[data-ui=v2] .nk-toolbar-sticky{position:sticky;top:0;z-index:5;background:var(--nk-bg);padding-top:var(--nk-space-2);padding-bottom:var(--nk-space-2)}[data-ui=v2] .is-dashboard-empty .stats-grid,[data-ui=v2] .is-dashboard-empty .dashboard-grid,.is-dashboard-empty .stats-grid,.is-dashboard-empty .dashboard-grid{display:none!important}[data-ui=v2] .export-page{align-items:stretch;max-width:720px}[data-ui=v2] .export-page .nk-empty{margin-top:var(--nk-space-4)}[data-ui=v2] .upload-inline-msg{text-align:center;margin-top:var(--nk-space-3);color:var(--nk-text-muted);font-size:var(--nk-font-sm)}[data-ui=v2] .heatmap-card-header{flex-wrap:wrap;gap:10px}[data-ui=v2] .settings-row{flex-wrap:wrap;gap:12px}@media (max-width: 767px){[data-ui=v2] .stats-grid,[data-ui=v2] .dashboard-stats{grid-template-columns:1fr}[data-ui=v2] .dashboard-grid{grid-template-columns:1fr;gap:16px}[data-ui=v2] .chart-card{padding:14px}[data-ui=v2] .chart-card .recharts-responsive-container{min-height:200px}[data-ui=v2] .page-header{flex-direction:column;align-items:stretch}[data-ui=v2] .page-header .actions,[data-ui=v2] .actions{width:100%}[data-ui=v2] .search-bar{flex:1 1 100%}[data-ui=v2] .heatmap-card-header,[data-ui=v2] .settings-row{flex-direction:column;align-items:stretch}[data-ui=v2] .settings-page{padding-left:0;padding-right:0}[data-ui=v2] .library-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px}[data-ui=v2] .nk-shell__main>.main-content{overflow-x:hidden}}@media (min-width: 900px){[data-ui=v2] .stats-grid,[data-ui=v2] .dashboard-stats{grid-template-columns:repeat(3,minmax(0,1fr))}}@keyframes nk-empty-fade-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.nk-empty{display:flex;flex-direction:column;align-items:center;gap:20px;width:100%;max-width:520px;margin:0 auto;padding:28px 20px;background:#fff;border:1px solid #d7e0db;border-radius:16px;box-sizing:border-box;animation:nk-empty-fade-in .4s ease-out both}[data-ui=v2] .nk-empty{background:var(--nk-surface);border-color:var(--nk-border)}.nk-empty__illustration{position:relative;flex:0 0 auto;width:100%;max-width:320px}.nk-empty__badge{position:absolute;top:8px;right:8px;z-index:2;padding:3px 10px;border-radius:999px;font-size:11px;font-weight:600;letter-spacing:.02em;color:#1b4834;background:#e5f0ea;border:1px solid #c5dbd0;white-space:nowrap}.nk-empty__content{width:100%;min-width:0;text-align:center}.nk-empty__title{margin:0 0 8px;font-size:20px;font-weight:700;color:#14241c;line-height:1.3}.nk-empty__desc{margin:0 0 20px;font-size:14px;line-height:1.6;color:#5b6b63}.nk-empty__actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}.nk-empty__btn{padding:10px 18px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:background .15s,border-color .15s,transform .15s}.nk-empty__btn--primary{border:1px solid #1b4834;background:#1b4834;color:#fff}.nk-empty__btn--primary:hover{background:#143628;border-color:#143628}.nk-empty__btn--secondary{border:1px solid #d7e0db;background:#fff;color:#1b4834}.nk-empty__btn--secondary:hover{background:#eef3f0}.nk-empty-art{padding:16px;border-radius:12px;background:#f4f7f5;border:1px solid #e2e8f0;overflow:hidden}[data-ui=v2] .nk-empty-art{background:var(--nk-surface-muted, #eef3f0);border-color:var(--nk-border, #d7e0db)}.nk-empty-art__bar{border-radius:4px;background:linear-gradient(90deg,#dde5e1 25%,#e8eeeb,#dde5e1 75%);background-size:200% 100%}.nk-empty-art__bar--short{height:10px;width:55%;margin-bottom:8px}.nk-empty-art__bar--value{height:18px;width:35%}.nk-empty-art__stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:14px}.nk-empty-art__stat-card{padding:10px;border-radius:8px;background:#ffffffb3;border:1px solid #e2e8f0}.nk-empty-art__chart{padding:12px;border-radius:8px;background:#ffffffb3;border:1px solid #e2e8f0;height:80px;display:flex;align-items:flex-end}.nk-empty-art__chart-bars{display:flex;align-items:flex-end;gap:8px;width:100%;height:100%}.nk-empty-art__chart-bar{flex:1;border-radius:4px 4px 0 0;background:#c5dbd0;min-height:8px}.nk-empty-art__book-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.nk-empty-art__book-card{display:flex;flex-direction:column;gap:6px}.nk-empty-art__book-cover{aspect-ratio:2 / 3;border-radius:4px;background:#c5dbd0;opacity:.6}.nk-empty-art__bar--title{height:8px;width:80%}.nk-empty-art__bar--author{height:6px;width:55%}.nk-empty-art__list-row{padding:12px;margin-bottom:8px;border-radius:8px;background:#ffffffb3;border:1px solid #e2e8f0}.nk-empty-art__list-row:last-child{margin-bottom:0}.nk-empty-art__bar--line{height:10px;width:90%;margin-bottom:6px}.nk-empty-art__bar--line.nk-empty-art__bar--short{width:60%}.nk-empty-art__list-meta{display:flex;gap:8px;margin-top:8px}.nk-empty-art__bar--meta{height:6px;width:48px}.nk-empty-art__export-card{padding:16px;border-radius:8px;background:#ffffffb3;border:1px solid #e2e8f0;display:flex;flex-direction:column;gap:12px}.nk-empty-art__bar--field{height:28px;width:100%;border-radius:6px}.nk-empty-art__export-checkbox{display:flex;align-items:center;gap:8px}.nk-empty-art__checkbox-box{width:16px;height:16px;border-radius:4px;border:1.5px solid #c5dbd0;flex-shrink:0}.nk-empty-art__bar--checkbox{height:8px;width:40%}.nk-empty-art__export-btn{height:36px;width:50%;border-radius:8px;background:#c5dbd0;opacity:.5}.nk-info-page{max-width:760px;margin:0 auto}.nk-info-hero{display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;margin-bottom:24px;gap:0}.nk-info-kicker{margin:0 0 8px;font-size:13px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:#5b6b63}[data-ui=v2] .nk-info-kicker{color:var(--nk-accent)}.nk-info-hero h1{margin:0 0 12px;font-size:28px;line-height:1.25;letter-spacing:-.02em;width:100%}.nk-info-lead,.nk-info-copy{margin:0;color:#5b6b63;font-size:15px;line-height:1.7;width:100%}[data-ui=v2] .nk-info-lead,[data-ui=v2] .nk-info-copy{color:var(--nk-text-muted)}.nk-info-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.nk-info-btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 16px;border-radius:8px;font-size:14px;font-weight:600;text-decoration:none;border:1px solid transparent;cursor:pointer}.nk-info-btn--primary{background:#1b4834;color:#fff}.nk-info-btn--primary:hover{background:#143628;color:#fff}.nk-info-btn--ghost{background:#fff;color:#1b4834;border-color:#c5dbd0}.nk-info-btn--ghost:hover{background:#e5f0ea}.nk-info-card{background:#fff;border:1px solid #d7e0db;border-radius:16px;padding:22px 20px;margin-bottom:16px}[data-ui=v2] .nk-info-card{background:var(--nk-surface);border-color:var(--nk-border)}.nk-info-card h2{margin:0 0 14px;font-size:18px}.nk-update-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}.nk-update-item{padding:14px 14px 12px;border-radius:12px;background:#f4f7f5;border:1px solid #e4ebe7}[data-ui=v2] .nk-update-item{background:var(--nk-surface-muted);border-color:var(--nk-border)}.nk-update-item h3{margin:0 0 6px;font-size:15px}.nk-update-item p{margin:0;font-size:14px;line-height:1.6;color:#5b6b63}.nk-support-points{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:10px;color:#5b6b63;font-size:14px;line-height:1.65}.nk-qr-panel{margin-top:18px;display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center}.nk-qr-image{width:min(260px,70vw);height:auto;border-radius:12px;border:1px solid #d7e0db;background:#fff;padding:10px;box-sizing:border-box}.nk-qr-missing{width:min(280px,80vw);min-height:220px;border:1px dashed #a8bdb2;border-radius:12px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:20px;color:#5b6b63;background:#f7faf8;box-sizing:border-box}.nk-qr-missing code{font-size:12px;background:#e5f0ea;padding:4px 8px;border-radius:6px}.nk-qr-caption{margin:0;font-size:13px;color:#5b6b63}.nk-info-note{margin-top:8px;padding:16px 4px 8px;color:#5b6b63;font-size:14px;line-height:1.65;display:flex;flex-direction:column;align-items:flex-start;gap:12px}.nk-info-note p{margin:0}.nk-unlock-form{display:flex;flex-direction:column;gap:10px;margin-top:14px;max-width:420px}.nk-auth-tabs{display:flex;gap:0;margin-top:14px;max-width:420px;border:1px solid #d7e0db;border-radius:8px;overflow:hidden}.nk-auth-tabs button{flex:1;-webkit-appearance:none;-moz-appearance:none;appearance:none;border:0;background:#f7faf8;color:#5b6b63;padding:10px 12px;font-size:14px;font-weight:600;cursor:pointer}.nk-auth-tabs button+button{border-left:1px solid #d7e0db}.nk-auth-tabs button.active{background:#14241c;color:#fff}.nk-info-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.nk-unlock-form label{font-size:14px;font-weight:600;color:#14241c}.nk-unlock-form input{width:100%;box-sizing:border-box;padding:10px 12px;border-radius:8px;border:1px solid #d7e0db;font-size:15px}.nk-unlock-ok{display:flex;flex-direction:column;align-items:flex-start;gap:12px;margin-top:12px}.nk-unlock-msg{margin:12px 0 0;font-size:14px;color:#5b6b63}@media (max-width: 767px){.nk-info-hero h1{font-size:22px}.nk-info-card{padding:18px 14px}.nk-info-actions{width:100%}.nk-info-btn{flex:1 1 auto}}.feedback-input,.feedback-textarea{width:100%;padding:12px;border:1.5px solid #e2e8f0;border-radius:8px;font-size:16px;font-family:Georgia,serif;color:#334155;background:#f8fafc;transition:border-color .18s,box-shadow .18s;box-sizing:border-box}.feedback-input:focus,.feedback-textarea:focus{outline:none;border-color:#38b2ac;box-shadow:0 0 0 2px #38b2ac1a;background:#fff}.feedback-textarea{min-height:120px;resize:vertical;line-height:1.7}.edit-guide-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#1e222c80;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);z-index:1003;display:flex;align-items:center;justify-content:center;animation:fadeIn .2s ease-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.edit-guide-popup{background:linear-gradient(145deg,#fff,#fefefe);border-radius:20px;box-shadow:0 20px 60px #1e222c40,0 4px 12px #1e222c26;width:480px;max-width:90vw;padding:36px 32px 28px;position:relative;animation:slideUp .3s ease-out;border:1px solid rgba(255,255,255,.8)}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.edit-guide-close{position:absolute;top:14px;right:14px;background:none;border:none;font-size:28px;color:#94a3b8;cursor:pointer;padding:4px 8px;line-height:1;border-radius:8px;transition:all .15s}.edit-guide-close:hover{background:#f1f5f9;color:#475569;transform:rotate(90deg)}.edit-guide-icon{font-size:48px;text-align:center;margin-bottom:16px;animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.edit-guide-popup h3{font-size:22px;font-weight:600;color:#1e293b;margin:0 0 12px;text-align:center}.edit-guide-popup p{font-size:15px;line-height:1.6;color:#475569;margin:0 0 24px;text-align:center}.edit-guide-demo{background:#f8fafc;border:2px dashed #cbd5e1;border-radius:12px;padding:20px;margin-bottom:24px;display:flex;flex-direction:column;gap:14px}.edit-guide-demo-item{display:flex;align-items:center;font-size:15px;color:#334155;padding:8px 12px;background:#fff;border-radius:8px;box-shadow:0 1px 3px #00000014;transition:transform .15s}.edit-guide-demo-item:hover{transform:translate(4px)}.edit-guide-demo-item span{font-weight:500}.edit-guide-button{width:100%;padding:12px 24px;background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;border:none;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;transition:all .2s;box-shadow:0 4px 12px #3b82f64d}.edit-guide-button:hover{background:linear-gradient(135deg,#2563eb,#1d4ed8);box-shadow:0 6px 16px 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