:root{--bg:#fff;--surface:#fff;--surface-2:#f5f5f5;--surface-3:#e9e9eb;--border:#ececee;--text-1:#0b0b0b;--text-2:#6f6f6f;--text-2-on-gray:color-mix(in srgb, var(--text-2) 82%, var(--text-1));--ink:#171717;--ink-strong:#000;--on-ink:#fff;--shadow-lift:0 10px 28px color-mix(in srgb, var(--text-1) 9%, transparent);--shadow-pop:0 24px 64px color-mix(in srgb, var(--text-1) 18%, transparent);--ease:cubic-bezier(.3, .7, .2, 1);--dur-fast:.12s;--dur-move:.2s;--dur-panel:.24s;--topbar-h:52px;--font-sans:Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;--font-mono:ui-monospace, "SF Mono", Menlo, Consolas, monospace;color-scheme:light}[data-theme=dark]{color-scheme:dark;--bg:#0f0f11;--surface:#0f0f11;--surface-2:#1b1b1f;--surface-3:#26262b;--border:#2a2a30;--text-1:#f0f0f2;--text-2:#a0a0a8;--text-2-on-gray:color-mix(in srgb, var(--text-2) 82%, var(--text-1));--ink:#e8e8ea;--ink-strong:#fff;--on-ink:#101012;--shadow-lift:0 10px 28px #00000073;--shadow-pop:0 24px 64px #0009}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text-1);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0;font-size:14px;line-height:1.6}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer;background:0 0;border:0;padding:0}[hidden]{display:none!important}::selection{background:var(--ink);color:var(--on-ink)}:focus-visible{outline:2px solid var(--ink);outline-offset:2px}svg,img{display:block}kbd{font-family:var(--font-mono);color:var(--text-2-on-gray);background:var(--surface-2);border:1px solid var(--border);border-radius:5px;padding:3px 5px;font-size:11px;line-height:1}.shell{grid-template-columns:220px minmax(0,1fr);min-height:100vh;display:grid}.sidebar{border-right:1px solid var(--border);flex-direction:column;height:100vh;padding:22px 18px 18px 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var(--border);text-align:center;border-radius:12px;margin-top:40px;padding:56px 24px}.empty .zero{font-family:var(--font-mono);letter-spacing:-.02em;font-size:40px;font-weight:600}.empty p{color:var(--text-2);margin:6px 0 18px;font-size:13px}.topbar .brand-word{font-size:22px}.side-scroll{scrollbar-width:none;flex:auto;min-height:0;overflow-y:auto}.side-scroll .side-block:first-child{margin-top:14px}.side-scroll::-webkit-scrollbar{display:none}.side-foot{border-top:1px solid var(--border);flex:none;align-items:center;gap:8px;padding-top:14px;display:flex}.langsel{font-family:var(--font-sans);color:var(--text-2);background:var(--surface-2);cursor:pointer;transition:background var(--dur-fast) ease, color var(--dur-fast) ease;border:0;border-radius:8px;padding:3px 6px;font-size:12px}.langsel:hover{color:var(--text-1);background:var(--surface-3)}.langsel:focus-visible{outline:2px solid var(--ink);outline-offset:2px}.side-foot .iconbtn{width:32px;height:32px;margin-left:auto}.side-foot 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