.sidebar{width:var(--sidebar-w);background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100;padding:24px 0 16px;overflow:visible;transition:background .3s,width .25s}.sidebar-logo{display:flex;align-items:center;gap:10px;padding:0 20px 28px;border-bottom:1px solid var(--border);margin-bottom:16px}.logo-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-family:var(--font-hanzi);font-size:20px;font-weight:700;flex-shrink:0}.logo-text{font-weight:700;font-size:15px;color:var(--text)}.sidebar-collapse-btn{position:absolute;top:50%;right:-12px;transform:translateY(-50%);width:24px;height:24px;border-radius:50%;border:1.5px solid var(--border);background:var(--surface);color:var(--text2);font-size:13px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;z-index:200;transition:all .2s;box-shadow:0 2px 6px #0000002e}.sidebar-collapse-btn:hover{border-color:var(--primary);color:var(--primary)}.sidebar.collapsed .sidebar-collapse-btn{right:-12px;transform:translateY(-50%) rotate(180deg)}.sidebar.collapsed{width:64px}.sidebar.collapsed .logo-text,.sidebar.collapsed .nav-item span,.sidebar.collapsed .sidebar-footer,.sidebar.collapsed .auth-info{display:none}.sidebar.collapsed .sidebar-logo{padding:16px 0;justify-content:center}.sidebar.collapsed .sidebar-nav{padding:0 8px}.sidebar.collapsed .nav-item{justify-content:center;padding:11px 0}.sidebar.collapsed .sidebar-auth{padding:10px 0;display:flex;justify-content:center}.sidebar.collapsed .auth-login-btn{width:36px;height:36px;padding:0;justify-content:center}.sidebar.collapsed .auth-login-btn svg{margin:0}.sidebar.collapsed .auth-avatar{font-size:20px}.sidebar.collapsed~.main-content{margin-left:64px}.sidebar-logo-img{width:36px;height:36px;object-fit:contain;border-radius:10px;flex-shrink:0;background:#0f0f1a;box-shadow:0 0 0 1.5px #ffffff0f}[data-theme=light] .sidebar-logo-img{box-shadow:0 1px 6px #00000040,0 0 0 1px #00000014}.mobile-logo-img{height:38px;width:auto;max-width:160px;object-fit:contain;object-position:left center;margin-right:auto;border-radius:10px;background:#0f0f1a;padding:3px 8px}.sidebar-nav{flex:1;display:flex;flex-direction:column;gap:4px;padding:0 12px;overflow-y:auto;min-height:0;scrollbar-width:none}.sidebar-nav::-webkit-scrollbar{display:none}.nav-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:10px;text-decoration:none;color:var(--text2);font-size:14px;font-weight:500;transition:all .2s}.nav-item svg{width:18px;height:18px;flex-shrink:0}.nav-item:hover{background:var(--surface2);color:var(--text)}.nav-item.active{background:var(--primary);color:#fff}.sidebar-footer{padding:16px 20px 0;border-top:1px solid var(--border);display:flex;align-items:center;gap:12px}.btn-icon{background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:8px 10px;cursor:pointer;font-size:16px;transition:.2s}.btn-icon:hover{transform:scale(1.1)}.btn-lang{background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:7px 12px;cursor:pointer;font-size:12px;font-weight:600;color:var(--text2);transition:.2s}.btn-lang:hover{background:var(--primary);color:#fff;border-color:var(--primary)}.nav-primary{display:flex;flex-direction:column;gap:4px}.nav-divider{height:1px;background:var(--border);margin:8px 12px}.nav-more-btn{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:10px;background:none;border:none;cursor:pointer;width:100%;color:var(--text3);font-size:13px;font-weight:500;transition:background .2s,color .2s;text-align:left}.nav-more-btn:hover{background:var(--surface2);color:var(--text2)}.nav-more-btn svg{flex-shrink:0}.nav-more-icon{font-size:13px;margin-left:auto;transition:transform .2s}.nav-secondary{overflow:hidden;max-height:0;transition:max-height .3s ease;display:flex;flex-direction:column;gap:4px}.nav-secondary.open{max-height:600px}.sidebar.collapsed .nav-more-btn{justify-content:center;padding:11px 0}.sidebar.collapsed .nav-more-btn span,.sidebar.collapsed .nav-secondary{display:none}.sidebar.collapsed .nav-divider{margin:8px 4px}