:root{--color-primary:#2563eb;--color-primary-hover:#1d4ed8;--color-sidebar:#0f172a;--color-page:#f4f7fb;--color-surface:#ffffff;--color-text:#172033;--color-muted:#64748b;--color-border:#e5e7eb;--color-success:#16a34a;--color-success-bg:#f0fdf4;--color-warning:#d97706;--color-warning-bg:#fffbeb;--color-danger:#dc2626;--color-danger-bg:#fef2f2;--radius-control:8px;--radius-card:12px;--shadow-card:0 1px 3px rgb(15 23 42/8%)}*,:after,:before{box-sizing:border-box}body,html{min-height:100%}body{margin:0;overflow-x:hidden;background:var(--color-page);color:var(--color-text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}button,input,textarea{font:inherit}:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}button:disabled{cursor:not-allowed;opacity:.62}.app-layout{display:flex;min-height:100vh}.app-sidebar{width:220px;flex-shrink:0;background:var(--color-sidebar);color:#fff;display:flex;flex-direction:column;padding:24px 0}.app-sidebar-brand{padding:0 20px 24px;font-size:1.1rem;font-weight:700;border-bottom:1px solid rgb(255 255 255/10%);margin-bottom:12px}.app-sidebar-nav{flex:1 1;padding:0 12px}.app-sidebar-nav a{display:block;padding:10px 12px;border-radius:var(--radius-control);color:#cbd5e1;text-decoration:none;transition:background .15s}.app-sidebar-nav a:hover{background:rgb(255 255 255/8%);color:#fff}.app-sidebar-nav a[aria-current=page]{background:var(--color-primary);color:#fff}.app-sidebar-footer{padding:12px 10px 0;border-top:1px solid rgb(255 255 255/10%);margin:0 12px}.app-sidebar-footer button{width:100%;padding:8px;border:none;border-radius:var(--radius-control);background:transparent;color:#94a3b8;cursor:pointer;text-align:left;font-size:.875rem}.app-sidebar-footer button:hover{background:rgb(255 255 255/8%);color:#fff}.app-main{flex:1 1;min-width:0;max-width:none;padding:32px 40px 48px}.app-content{width:100%;max-width:960px;margin:0 auto}.app-mobile-header{display:none;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--color-sidebar);color:#fff}.app-mobile-brand{font-weight:700}.app-mobile-header button{background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:4px 8px}.mobile-nav-overlay{position:fixed;inset:0;background:rgb(15 23 42/60%);z-index:90}.mobile-nav-panel{position:fixed;top:0;left:0;bottom:0;width:240px;background:var(--color-sidebar);z-index:100;display:flex;flex-direction:column;padding:24px 12px;color:#fff}.mobile-nav-brand{font-size:1.1rem;font-weight:700;padding:0 12px 16px;border-bottom:1px solid rgb(255 255 255/10%);margin-bottom:12px}.mobile-nav-link{display:block;padding:10px 12px;border-radius:var(--radius-control);color:#cbd5e1;text-decoration:none}.mobile-nav-link-active{background:var(--color-primary);color:#fff}.mobile-nav-footer{margin-top:auto;padding:12px 10px 0;border-top:1px solid rgb(255 255 255/10%)}.mobile-nav-logout{width:100%;padding:8px;border:none;border-radius:var(--radius-control);background:transparent;color:#94a3b8;cursor:pointer;text-align:left;font-size:.875rem}@media (max-width:767px){.app-layout{flex-direction:column}.app-sidebar{display:none}.app-mobile-header{display:flex;width:100%}.app-main{width:100%;padding:20px 16px 40px}}@media (prefers-reduced-motion:reduce){*,:after,:before{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}.ui-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-card);padding:20px;box-shadow:var(--shadow-card)}.ui-card+.ui-card{margin-top:16px}.ui-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border:none;border-radius:var(--radius-control);font-weight:600;cursor:pointer;transition:background .15s,opacity .15s}.ui-btn-primary{background:var(--color-primary);color:#fff}.ui-btn-primary:hover{background:var(--color-primary-hover)}.ui-btn-danger{background:var(--color-danger);color:#fff}.ui-btn-danger:hover{background:#b91c1c}.ui-btn-secondary{background:#e2e8f0;color:var(--color-text)}.ui-btn-secondary:hover{background:#cbd5e1}.ui-form-field{margin-bottom:16px}.ui-form-field label{display:block;margin-bottom:4px;font-weight:600;font-size:.875rem}.ui-form-field input,.ui-form-field textarea{width:100%;padding:10px 12px;border:1px solid var(--color-border);border-radius:var(--radius-control);font-size:.95rem}.ui-form-field .ui-form-help{font-size:.8rem;color:var(--color-muted);margin-top:2px}.ui-form-title{font-size:1.25rem;margin:0 0 16px}.ui-alert{padding:16px 20px;border-radius:var(--radius-card);border-left:4px solid}.ui-alert-success{background:var(--color-success-bg);border-color:var(--color-success);color:var(--color-success)}.ui-alert-warning{background:var(--color-warning-bg);border-color:var(--color-warning);color:var(--color-warning)}.ui-alert-danger{background:var(--color-danger-bg);border-color:var(--color-danger);color:var(--color-danger)}.ui-alert-title{font-weight:700;margin-bottom:4px}.ui-badge{display:inline-flex;align-items:center;gap:4px;padding:2px 10px;border-radius:999px;font-size:.8rem;font-weight:600}.ui-badge-success{background:var(--color-success-bg);color:var(--color-success)}.ui-badge-warning{background:var(--color-warning-bg);color:var(--color-warning)}.ui-empty{text-align:center;padding:48px 20px;color:var(--color-muted)}.ui-empty-title{font-weight:600;margin-bottom:4px}.ui-loading{text-align:center;padding:48px 20px;color:var(--color-muted)}.ui-spinner{display:inline-block;width:18px;height:18px;border:2px solid #e2e8f0;border-top:2px solid var(--color-primary);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.ui-page-header{margin-bottom:24px}.ui-page-header-title{font-size:1.25rem;font-weight:700;margin:0 0 4px}.ui-page-header-desc{color:var(--color-muted);margin:0;font-size:.9rem}.login-page{display:flex;min-height:100vh}.login-brand-panel{flex:1 1;background:var(--color-sidebar);display:flex;flex-direction:column;justify-content:center;align-items:center;padding:48px;color:#fff}.login-brand-panel h1{font-size:2rem;margin-bottom:8px}.login-brand-panel .login-tagline{color:#94a3b8;margin-bottom:32px}.login-brand-panel .login-trust{font-size:.9rem;color:#cbd5e1;list-style:none;padding:0}.login-brand-panel .login-trust li{margin-bottom:8px}.login-form-panel{flex:1 1;display:flex;justify-content:center;align-items:center;padding:48px;background:var(--color-page)}@media (max-width:639px){.login-page{flex-direction:column}.login-brand-panel{flex:0 0 auto;align-items:flex-start;padding:24px 20px}.login-brand-panel h1{font-size:1.35rem}.login-brand-panel .login-tagline{margin-bottom:16px;font-size:.85rem}}.workbench-input-card textarea{width:100%;border:1px solid var(--color-border);border-radius:var(--radius-control);padding:12px;resize:vertical;min-height:80px}.workbench-result-copy{border-left-color:var(--color-success);background:var(--color-success-bg)}.workbench-result-human{border-left-color:var(--color-warning);background:var(--color-warning-bg)}.workbench-reply-text{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-control);padding:16px;white-space:pre-wrap;max-height:300px;overflow-y:auto}.wb-result-row{margin-bottom:8px}.wb-input-footer,.wb-result-row{display:flex;justify-content:space-between;align-items:center}.wb-input-footer{margin-top:8px}.wb-input-hint{font-size:.75rem;color:var(--color-muted)}.wb-result-card{border-left-width:4px;border-left-style:solid;margin-top:16px}.wb-history-row{display:flex;justify-content:space-between;margin-bottom:6px}.knowledge-tag{display:inline-block;background:#eff6ff;color:var(--color-primary);border-radius:999px;padding:2px 10px;font-size:.8rem;margin:2px 4px 2px 0}.knowledge-search-row{display:flex;gap:8px;margin-top:16px}.knowledge-item-row{display:flex;justify-content:space-between;align-items:flex-start}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.flex-between{display:flex;justify-content:space-between;align-items:center}.mt-8{margin-top:8px}.mt-12{margin-top:12px}.mt-16{margin-top:16px}.mt-32{margin-top:32px}.mb-8{margin-bottom:8px}.text-center{text-align:center}.text-muted{color:var(--color-muted)}.text-muted,.text-sm{font-size:.875rem}.text-xs{font-size:.8rem}.w-full{width:100%}.max-w-400{max-width:400px}.flex-1{flex:1 1}.flex-shrink-0{flex-shrink:0}.ml-12{margin-left:12px}.strong-result{font-size:1.05rem}.strong-item{font-size:.9rem}.h3-section{font-size:1.05rem;font-weight:600;margin-bottom:12px}.h3-form{margin:0 0 16px;font-size:1rem;font-weight:600}.card-pad{padding:16px}.link-primary{color:var(--color-primary)}.h1-danger{font-size:1.5rem;color:var(--color-danger)}.p-muted,.p-sm-muted{color:var(--color-muted)}.p-sm-muted{font-size:.8rem}.p-danger{margin-top:8px;font-weight:700;color:var(--color-danger)}