*{box-sizing:border-box;padding:0;margin:0}body,html{max-width:100vw;overflow-x:hidden;font-family:var(--font-family-base,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif);-webkit-text-size-adjust:100%;height:100%;min-height:100%;display:flex;flex-direction:column}body{background-color:var(--bg-primary);color:var(--text-primary);flex:1;display:flex;flex-direction:column}a{color:inherit;text-decoration:none}@layer lingki-control-reset{:where(button,input,textarea,select){font-family:inherit}:where(button,[role=button]){font:inherit;letter-spacing:inherit;text-transform:none;touch-action:manipulation}:where(button:focus-visible,[role=button]:focus-visible){outline:2px solid color-mix(in srgb,var(--lk-primary,var(--theme-accent-color,#a93b5b)) 38%,transparent);outline-offset:2px}}*{-webkit-tap-highlight-color:transparent}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:rgba(0,0,0,.2);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:rgba(0,0,0,.3)}:root{--font-family-english:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--font-family-chinese:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;--font-family-base:var(--font-family-english),var(--font-family-chinese),-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--primary-color:#007bff;--secondary-color:#6c757d;--success-color:#28a745;--danger-color:#dc3545;--warning-color:#ffc107;--info-color:#17a2b8;--light-color:#f8f9fa;--dark-color:#343a40;--bg-primary:#ffffff;--bg-secondary:#f8f9fa;--bg-tertiary:#e9ecef;--text-primary:#1f1f1f;--text-secondary:#6c757d;--text-muted:#8a8a8a;--border-color:#dee2e6;--border-light:#e9ecef;--shadow-sm:0 0.125rem 0.25rem rgba(0,0,0,0.075);--shadow:0 0.5rem 1rem rgba(0,0,0,0.15);--shadow-lg:0 1rem 3rem rgba(0,0,0,0.175);--border-radius:0.375rem;--border-radius-sm:0.25rem;--border-radius-lg:0.5rem;--border-radius-xl:1rem;--spacing-xs:0.25rem;--spacing-sm:0.5rem;--spacing-md:1rem;--spacing-lg:1.5rem;--spacing-xl:3rem;--font-size-xs:0.75rem;--font-size-sm:0.875rem;--font-size-base:1rem;--font-size-lg:1.125rem;--font-size-xl:1.25rem;--font-size-2xl:1.5rem;--theme-bg-primary:#ffffff;--theme-bg-secondary:#f8f9fa;--theme-bg-tertiary:#e9ecef;--theme-text-primary:#1f1f1f;--theme-text-secondary:#6c757d;--theme-text-tertiary:#8a8a8a;--theme-accent-color:#007bff;--theme-accent-hover:#0056b3;--theme-border-color:#dee2e6;--theme-border-light:#e9ecef;--theme-shadow-light:0 1px 3px rgba(0,0,0,0.1);--theme-shadow-medium:0 2px 8px rgba(0,0,0,0.15);--theme-shadow-heavy:0 4px 16px rgba(0,0,0,0.2);--theme-message-user-bg:#007bff;--theme-message-ai-bg:#ffffff;--theme-message-user-text:#ffffff;--theme-message-ai-text:#1f1f1f;--theme-header-bg:rgba(247,247,247,0.95);--theme-nav-bg:#ffffff;--theme-nav-active:#007bff;--container-max-width:1200px;--container-padding:1rem;--mobile-max:767px;--tablet-min:768px;--tablet-max:1023px;--desktop-min:1024px;--large-desktop-min:1440px}@supports (-webkit-touch-callout:none) and (-webkit-overflow-scrolling:touch){:where(input:not([type=button]):not([type=submit]):not([type=reset]):not([type=checkbox]):not([type=radio]):not([type=range]):not([type=color]):not([type=file]):not([type=hidden]),textarea,select,.contenteditable,[contenteditable=true]){font-size:max(16px,1em);line-height:1.4}}.container{width:100%;max-width:var(--container-max-width);margin:0 auto;padding:0 var(--container-padding)}@media (max-width:767px){:root{--container-padding:0.75rem;--font-size-base:0.875rem}.container{padding:0 var(--container-padding)}.desktop-only,.tablet-only{display:none!important}.mobile-only{display:block!important}h1{font-size:1.5rem}h2{font-size:1.25rem}h3{font-size:1.125rem}h4{font-size:1rem}h5{font-size:.875rem}h6{font-size:.75rem}}@media (min-width:768px) and (max-width:1023px){:root{--container-padding:1rem;--font-size-base:1rem}.container{padding:0 var(--container-padding)}.desktop-only,.mobile-only{display:none!important}.tablet-only{display:block!important}h1{font-size:1.75rem}h2{font-size:1.5rem}h3{font-size:1.25rem}h4{font-size:1.125rem}h5{font-size:1rem}h6{font-size:.875rem}}@media (min-width:1024px){:root{--container-padding:1.5rem;--font-size-base:1rem}.container{padding:0 var(--container-padding)}.mobile-only,.tablet-only{display:none!important}.desktop-only{display:block!important}h1{font-size:2rem}h2{font-size:1.75rem}h3{font-size:1.5rem}h4{font-size:1.25rem}h5{font-size:1.125rem}h6{font-size:1rem}}@media (min-width:1440px){:root{--container-padding:2rem}.container{padding:0 var(--container-padding)}}@media (max-width:480px){:root{--container-padding:0.5rem;--font-size-base:0.8125rem}.container{padding:0 var(--container-padding)}h1{font-size:1.25rem}h2{font-size:1.125rem}h3{font-size:1rem}h4{font-size:.875rem}h5{font-size:.8125rem}h6{font-size:.75rem}}@media (orientation:landscape) and (max-height:500px){:root{--spacing-lg:1rem;--spacing-xl:2rem}.chat-interface{height:100vh;max-height:100vh}}@media (-webkit-min-device-pixel-ratio:2),(min-resolution:192dpi){img{image-rendering:-webkit-optimize-contrast;image-rendering:crisp-edges}}@media (prefers-color-scheme:dark){:root{--bg-primary:#1a1a1a;--bg-secondary:#2d2d2d;--bg-tertiary:#404040;--text-primary:#ffffff;--text-secondary:#b0b0b0;--text-muted:#808080;--border-color:#404040;--border-light:#2d2d2d}body{background-color:var(--bg-primary);color:var(--text-primary)}}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}@media (prefers-contrast:high){:root{--border-color:#000000;--text-secondary:#000000}}@media print{.chat-interface{max-width:none;height:auto}html body .chat-interface .chat-actions,html body .chat-interface .chat-header .back-btn{display:none}}@media (prefers-reduced-motion:no-preference){.fade-in{animation:fadeIn .3s ease-in-out}.slide-up{animation:slideUp .3s ease-out}.slide-down{animation:slideDown .3s ease-out}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes slideDown{0%{transform:translateY(-20px);opacity:0}to{transform:translateY(0);opacity:1}}.app-container{width:100%;height:100dvh;max-height:100dvh;display:flex;justify-content:center;align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);overflow:hidden}@media (min-width:768px){.app-container{background:#f0f2f5;justify-content:flex-start;align-items:flex-start}}@media (max-width:767px){.app-container{background:#f0f2f5}}.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}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.d-none{display:none!important}.d-block{display:block!important}.d-flex{display:flex!important}.d-inline-flex{display:inline-flex!important}.justify-content-center{justify-content:center!important}.justify-content-between{justify-content:space-between!important}.align-items-center{align-items:center!important}.flex-column{flex-direction:column!important}.flex-grow-1{flex-grow:1!important}.w-100{width:100%!important}.h-100{height:100%!important}.m-0{margin:0!important}.p-0{padding:0!important}.rounded{border-radius:var(--border-radius)!important}.shadow{box-shadow:var(--shadow)!important}.border{border:1px solid var(--border-color)!important}.bg-primary{background-color:var(--primary-color)!important}.bg-secondary{background-color:var(--bg-secondary)!important}.text-primary{color:var(--text-primary)!important}.text-secondary{color:var(--text-secondary)!important}*{transition:background-color .3s ease-in-out,color .3s ease-in-out,border-color .3s ease-in-out,box-shadow .3s ease-in-out}@media (prefers-reduced-motion:reduce){*{transition:none!important}}