html,body{width:100%;height:100%}input::-ms-clear,input::-ms-reveal{display:none}*,*:before,*:after{box-sizing:border-box}html{font-family:sans-serif;line-height:1.15;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;-ms-overflow-style:scrollbar;-webkit-tap-highlight-color:rgba(0,0,0,0)}@-ms-viewport{width:device-width}body{margin:0}[tabindex="-1"]:focus{outline:none}hr{box-sizing:content-box;height:0;overflow:visible}h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:.5em;font-weight:500}p{margin-top:0;margin-bottom:1em}abbr[title],abbr[data-original-title]{-webkit-text-decoration:underline dotted;text-decoration:underline dotted;border-bottom:0;cursor:help}address{margin-bottom:1em;font-style:normal;line-height:inherit}input[type=text],input[type=password],input[type=number],textarea{-webkit-appearance:none}ol,ul,dl{margin-top:0;margin-bottom:1em}ol ol,ul ul,ol ul,ul ol{margin-bottom:0}dt{font-weight:500}dd{margin-bottom:.5em;margin-left:0}blockquote{margin:0 0 1em}dfn{font-style:italic}b,strong{font-weight:bolder}small{font-size:80%}sub,sup{position:relative;font-size:75%;line-height:0;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}pre,code,kbd,samp{font-size:1em;font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,Courier,monospace}pre{margin-top:0;margin-bottom:1em;overflow:auto}figure{margin:0 0 1em}img{vertical-align:middle;border-style:none}a,area,button,[role=button],input:not([type=range]),label,select,summary,textarea{touch-action:manipulation}table{border-collapse:collapse}caption{padding-top:.75em;padding-bottom:.3em;text-align:left;caption-side:bottom}input,button,select,optgroup,textarea{margin:0;color:inherit;font-size:inherit;font-family:inherit;line-height:inherit}button,input{overflow:visible}button,select{text-transform:none}button,html [type=button],[type=reset],[type=submit]{-webkit-appearance:button}button::-moz-focus-inner,[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner{padding:0;border-style:none}input[type=radio],input[type=checkbox]{box-sizing:border-box;padding:0}input[type=date],input[type=time],input[type=datetime-local],input[type=month]{-webkit-appearance:listbox}textarea{overflow:auto;resize:vertical}fieldset{min-width:0;margin:0;padding:0;border:0}legend{display:block;width:100%;max-width:100%;margin-bottom:.5em;padding:0;color:inherit;font-size:1.5em;line-height:inherit;white-space:normal}progress{vertical-align:baseline}[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{outline-offset:-2px;-webkit-appearance:none}[type=search]::-webkit-search-cancel-button,[type=search]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{font:inherit;-webkit-appearance:button}output{display:inline-block}summary{display:list-item}template{display:none}[hidden]{display:none!important}mark{padding:.2em;background-color:#feffe6}:root{--color-primary: #7C9EFF;--color-primary-hover: #9AB4FF;--color-primary-light: rgba(124, 158, 255, .12);--color-primary-border: rgba(124, 158, 255, .3);--color-primary-deep: #4F6BED;--color-accent: #C9A96E;--color-accent-light: rgba(201, 169, 110, .1);--color-accent-border: rgba(201, 169, 110, .25);--color-accent-glow: rgba(201, 169, 110, .35);--bg-base: #0D0F1A;--bg-surface: #161826;--bg-elevated: #1E2136;--bg-chat: #0D0F1A;--bg-white: #161826;--bg-input: #1E2136;--gradient-base: linear-gradient(160deg, #0D0F1A 0%, #141627 40%, #1A1535 100%);--gradient-surface: linear-gradient(135deg, #161826 0%, #1A1D35 100%);--gradient-accent: linear-gradient(135deg, rgba(124,158,255,.08) 0%, rgba(160,120,255,.06) 100%);--gradient-glow: radial-gradient(ellipse at top, rgba(124,158,255,.12) 0%, transparent 60%);--text-primary: #E8EAED;--text-secondary: #9AA0B8;--text-tertiary: #5A6080;--text-inverse: #0D0F1A;--text-on-primary: #FFFFFF;--border-light: rgba(255, 255, 255, .07);--border-medium: rgba(255, 255, 255, .12);--border-dark: rgba(255, 255, 255, .18);--sidebar-width: 260px;--sidebar-bg: #11131F;--sidebar-text: rgba(255, 255, 255, .45);--sidebar-text-active: #E8EAED;--sidebar-item-hover: rgba(255, 255, 255, .05);--sidebar-item-active: rgba(124, 158, 255, .12);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .4);--shadow-md: 0 4px 20px rgba(0, 0, 0, .5);--shadow-lg: 0 8px 40px rgba(0, 0, 0, .6);--shadow-glow: 0 0 20px rgba(124, 158, 255, .15);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s cubic-bezier(.4, 0, .2, 1);--font-display: "Inter", -apple-system, BlinkMacSystemFont, "Noto Sans SC", "PingFang SC", sans-serif;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-mono: "JetBrains Mono", "SF Mono", "Fira Code", "Consolas", monospace}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;overflow:hidden}body{font-family:var(--font-sans);background:var(--gradient-base);color:var(--text-primary);font-size:14px;line-height:1.6;font-weight:400;letter-spacing:-.005em;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app-layout{display:flex;height:100vh;width:100%}.app-layout.landing-mode .sidebar{display:none}.sidebar{width:var(--sidebar-width);background:var(--sidebar-bg);border-right:1px solid var(--border-light);display:flex;flex-direction:column;flex-shrink:0;position:relative;overflow:hidden}.sidebar-header{padding:24px 20px;border-bottom:1px solid var(--border-light);position:relative}.sidebar-logo{display:flex;align-items:center;gap:12px}.sidebar-logo-icon{width:38px;height:38px;border-radius:var(--radius-md);background:linear-gradient(135deg,#7c9eff33,#a078ff26);display:flex;align-items:center;justify-content:center;flex-shrink:0;border:1px solid rgba(124,158,255,.2)}.sidebar-logo-icon svg{width:20px;height:20px;color:var(--color-primary)}.sidebar-logo-text{display:flex;flex-direction:column}.sidebar-logo-title{font-family:var(--font-display);font-size:16px;font-weight:600;color:var(--text-primary);letter-spacing:-.01em}.sidebar-logo-subtitle{font-size:11px;font-weight:400;color:var(--text-tertiary);margin-top:2px;letter-spacing:.01em}.sidebar-actions{padding:16px 12px 8px;position:relative}.sidebar-new-chat-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:11px;border-radius:var(--radius-md);border:1px solid var(--border-medium);background:var(--bg-elevated);color:var(--text-primary);font-size:13px;font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.sidebar-new-chat-btn:hover{background:#7c9eff1f;border-color:var(--color-primary-border);color:var(--color-primary)}.sidebar-new-chat-btn svg{width:16px;height:16px}.sidebar-history{flex:1;padding:8px 12px;overflow-y:auto;position:relative}.sidebar-history::-webkit-scrollbar{width:3px}.sidebar-history::-webkit-scrollbar-thumb{background:#ffffff14;border-radius:2px}.sidebar-section-label{font-family:var(--font-sans);font-size:10px;font-weight:500;text-transform:uppercase;letter-spacing:.1em;color:var(--text-tertiary);padding:12px 12px 8px}.sidebar-empty{padding:16px 12px;font-size:12px;color:var(--text-tertiary);text-align:center}.sidebar-history-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius-md);color:var(--text-secondary);font-size:13px;cursor:pointer;transition:all var(--transition-fast);margin-bottom:2px;border:none;background:none;width:100%;text-align:left}.sidebar-history-item:hover{background:var(--sidebar-item-hover);color:var(--sidebar-text-active)}.sidebar-history-item.active{background:var(--sidebar-item-active);color:var(--sidebar-text-active)}.sidebar-history-item.active svg{opacity:.8}.sidebar-history-item svg{width:16px;height:16px;flex-shrink:0;opacity:.4}.sidebar-history-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sidebar-history-delete{opacity:0;transition:opacity var(--transition-fast);padding:4px;border-radius:4px}.sidebar-history-delete:hover{background:#ef444433;color:#fca5a5}.sidebar-history-item:hover .sidebar-history-delete{opacity:1}.sidebar-history-delete svg{width:14px;height:14px}.sidebar-footer{padding:16px 20px;border-top:1px solid var(--border-light);position:relative}.sidebar-version{display:flex;align-items:center;gap:8px;font-size:11px;font-family:var(--font-mono);color:var(--text-tertiary);letter-spacing:.01em}.sidebar-version-dot{width:6px;height:6px;border-radius:50%;background:#4ade80;box-shadow:0 0 6px #4ade8080;animation:pulse-dot 3s ease-in-out infinite}@keyframes pulse-dot{0%,to{opacity:.7}50%{opacity:1;box-shadow:0 0 10px #4ade8099}}.main-content{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--gradient-base);position:relative}.chat-container{flex:1;display:flex;flex-direction:column;max-width:820px;width:100%;margin:0 auto;overflow:hidden;animation:chat-fade-in .35s ease}@keyframes chat-fade-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.chat-messages{flex:1;overflow-y:auto;padding:32px 24px 16px;scroll-behavior:smooth}.chat-messages::-webkit-scrollbar{width:5px}.chat-messages::-webkit-scrollbar-track{background:transparent}.chat-messages::-webkit-scrollbar-thumb{background:#ffffff1f;border-radius:3px}.chat-messages::-webkit-scrollbar-thumb:hover{background:#fff3}.message{display:flex;gap:14px;margin-bottom:32px;padding:0 24px;align-items:flex-start}.message.user{flex-direction:column;align-items:flex-end;gap:0;margin-left:0}.message-avatar{width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}.message-avatar svg{width:16px;height:16px}.message.assistant .message-avatar{background:linear-gradient(135deg,var(--color-primary-deep) 0%,var(--color-primary) 100%);color:#fff}.message.user .message-avatar{display:none}.message-content{font-size:15px;line-height:1.8;color:var(--text-primary)}.message.assistant .message-content{flex:1;min-width:0;background:transparent;border:none;padding:0;border-radius:0;box-shadow:none}.message.user .message-content{background:var(--bg-elevated);border:1px solid var(--border-light);padding:12px 18px;border-radius:var(--radius-xl);max-width:85%;font-size:15px;color:var(--text-primary);box-shadow:none}.markdown-content{line-height:1.8}.markdown-content h1,.markdown-content h2,.markdown-content h3{margin:1em 0 .5em;font-weight:600;color:var(--text-primary);font-family:var(--font-display);letter-spacing:-.01em}.message.user .markdown-content h1,.message.user .markdown-content h2,.message.user .markdown-content h3{color:var(--text-primary)}.markdown-content h2{font-size:1.15em}.markdown-content h3{font-size:1.05em}.markdown-content p{margin:.5em 0}.markdown-content ul,.markdown-content ol{padding-left:1.5em;margin:.5em 0}.markdown-content li{margin:.3em 0}.markdown-content strong{color:var(--color-primary);font-weight:600}.message.user .markdown-content strong{color:#a8c8ff;font-weight:600}.markdown-content code{background:#7c9eff1f;color:var(--color-primary);padding:.15em .4em;border-radius:4px;font-size:.88em;font-family:var(--font-mono);border:1px solid rgba(124,158,255,.2)}.message.user .markdown-content code{background:#ffffff1a;color:#a8c8ff;border-color:#ffffff26}.markdown-content pre{background:var(--bg-elevated);padding:14px 16px;border-radius:var(--radius-md);overflow-x:auto;margin:.8em 0;border:1px solid var(--border-light)}.markdown-content pre code{background:none;color:#c8dcff;padding:0;font-size:13px;border:none}.markdown-content blockquote{margin:.6em 0;padding:.4em 1em;border-left:3px solid var(--color-primary);background:var(--bg-elevated);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-secondary)}.markdown-content blockquote p{margin:.2em 0}.markdown-content table{width:100%;border-collapse:collapse;margin:.8em 0;font-size:13px;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--border-light)}.markdown-content thead{background:var(--bg-elevated)}.markdown-content th{padding:8px 12px;text-align:left;font-weight:600;color:var(--text-primary);border-bottom:2px solid var(--border-light)}.markdown-content td{padding:6px 12px;border-bottom:1px solid var(--border-light);color:var(--text-primary)}.markdown-content tr:last-child td{border-bottom:none}.markdown-content tr:hover td{background:#ffffff05}.markdown-content hr{border:none;border-top:1px solid var(--border-light);margin:1em 0}.markdown-content a{color:var(--color-primary);text-decoration:underline;text-decoration-color:#7c9eff4d;text-underline-offset:2px;word-break:break-all;transition:text-decoration-color .2s}.markdown-content a:hover{text-decoration-color:var(--color-primary)}.markdown-content del{color:var(--text-tertiary)}.chart-container{margin-top:16px;padding:16px;background:#fff;border-radius:var(--radius-md);border:1px solid rgba(0,0,0,.08)}.table-container{margin-top:16px}.table-container .ant-table{font-size:13px;border-radius:var(--radius-md);overflow:hidden;background:var(--bg-elevated)!important;color:var(--text-primary)!important}.table-container .ant-table-thead>tr>th,.table-container .ant-table-thead>tr>td{background:var(--bg-elevated)!important;font-weight:600;color:var(--text-secondary)!important;font-size:12px;text-transform:uppercase;letter-spacing:.04em;font-family:var(--font-sans);border-bottom-color:var(--border-light)!important}.table-container .ant-table-thead>tr>th:before{display:none!important}.table-container .ant-table-tbody>tr>td{border-bottom-color:var(--border-light)!important;color:var(--text-primary)!important;background:transparent!important}.table-container .ant-table-tbody>tr:hover>td{background:#ffffff08!important}.table-container .ant-table-cell-row-hover{background:#ffffff08!important}.table-container .ant-pagination .ant-pagination-item{border-color:var(--border-light);background:var(--bg-elevated)}.table-container .ant-pagination .ant-pagination-item a{color:var(--text-secondary)}.table-container .ant-pagination .ant-pagination-item-active{border-color:var(--color-primary)}.table-container .ant-pagination .ant-pagination-item-active a{color:var(--color-primary)}.table-container .ant-pagination .ant-pagination-prev .ant-pagination-item-link,.table-container .ant-pagination .ant-pagination-next .ant-pagination-item-link{border-color:var(--border-light);color:var(--text-secondary);background:var(--bg-elevated)}.table-container .ant-empty-description{color:var(--text-tertiary)}.source-links{margin-top:16px;border:1px solid var(--border-light);border-radius:var(--radius-md);overflow:hidden;background:var(--bg-elevated)}.source-links-header{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--bg-surface);font-size:13px;font-weight:500;color:var(--text-secondary);border-bottom:1px solid var(--border-light)}.source-links-header svg{width:16px;height:16px;color:var(--text-tertiary)}.source-links-list{max-height:300px;overflow-y:auto}.source-links-list::-webkit-scrollbar{width:3px}.source-links-list::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:2px}.source-link-item{display:block;padding:12px 16px;border-bottom:1px solid var(--border-light);text-decoration:none;color:inherit;transition:background var(--transition-fast)}.source-link-item:last-child{border-bottom:none}.source-link-item:hover{background:#7c9eff0d}.source-link-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.source-date{font-size:11px;font-family:var(--font-mono);color:var(--text-tertiary);display:flex;align-items:center;gap:4px}.source-date svg{width:12px;height:12px}.source-platform{display:inline-flex;align-items:center;gap:4px;font-size:11px;padding:2px 10px;border-radius:var(--radius-full);font-weight:500}.source-platform svg{width:12px;height:12px}.source-platform.douyin{background:#7c9eff1f;color:var(--color-primary)}.source-platform.xiaohongshu{background:#dc506426;color:#f5a0a8}.source-platform.weibo{background:#e6643226;color:#f0a080}.source-platform.bilibili{background:#fb729926;color:#f0a0c0}.source-platform.default{background:#7c9eff1f;color:var(--color-primary)}.source-title{display:block;font-size:13px;color:var(--text-primary);line-height:1.5;margin-bottom:6px}.source-meta{display:flex;gap:12px;font-size:11px;font-family:var(--font-mono);color:var(--text-tertiary)}.source-author{color:var(--text-secondary);font-weight:500;font-family:var(--font-sans)}.source-stat{display:inline-flex;align-items:center;gap:4px}.source-stat svg{width:12px;height:12px}.message.user .source-links{border-color:#ffffff1a;background:#0003}.message.user .source-links-header{background:#00000026;color:#ffffffb3;border-bottom-color:#ffffff14}.message.user .source-link-item:hover{background:#ffffff0f}.message.user .source-platform{background:#ffffff1f;color:#ffffffe6}.message.user .source-title{color:#ffffffe6}.message.user .source-meta,.message.user .source-author{color:#ffffff8c}.message.user .source-date{color:#ffffff73}.typing-indicator{display:flex;gap:5px;padding:6px 0}.typing-indicator span{width:7px;height:7px;border-radius:50%;background:var(--color-primary);animation:typing 1.4s infinite ease-in-out}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,80%,to{transform:scale(.5);opacity:.3}40%{transform:scale(1);opacity:1}}.thinking-section{margin-bottom:14px;padding:14px 16px;background:var(--bg-elevated);border-radius:0 var(--radius-md) var(--radius-md) 0;border:1px solid var(--border-light);border-left:3px solid var(--color-primary)}.thinking-header{display:flex;align-items:center;gap:6px;font-size:11px;font-weight:600;font-family:var(--font-mono);color:var(--text-secondary);margin-bottom:10px;letter-spacing:.05em;text-transform:uppercase}.thinking-icon{font-size:14px;line-height:1}.thinking-steps{display:flex;flex-direction:column;gap:8px}.thinking-step{display:flex;gap:10px;align-items:flex-start}.thinking-step-number{width:20px;height:20px;border-radius:50%;background:linear-gradient(135deg,var(--color-primary-deep) 0%,var(--color-primary) 100%);color:#fff;font-size:11px;font-weight:700;font-family:var(--font-mono);display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:1px}.thinking-step-content{display:flex;flex-direction:column;gap:2px;min-width:0}.thinking-tool{font-size:12px;font-weight:600;color:var(--color-primary);display:inline-block}.thinking-detail{font-size:12px;color:var(--text-secondary);line-height:1.5;word-break:break-word}.chat-input-area{padding:12px 24px 8px}.chat-input-wrapper{position:relative;display:flex;align-items:flex-end;background:var(--bg-surface);border:1.5px solid var(--border-medium);border-radius:var(--radius-xl);padding:12px 60px 12px 16px;transition:all var(--transition-fast);box-shadow:var(--shadow-md)}.chat-input-wrapper:focus-within{border-color:var(--color-primary);box-shadow:var(--shadow-md),0 0 0 4px #7c9eff1a}.chat-input{flex:1;background:transparent;border:none;outline:none;color:var(--text-primary);font-size:15px;font-family:var(--font-sans);font-weight:400;resize:none;line-height:1.6;min-height:24px;max-height:120px;padding:0}.chat-input::placeholder{color:var(--text-tertiary)}.chat-send-btn{position:absolute;right:10px;bottom:10px;width:36px;height:36px;border-radius:50%;border:none;background:linear-gradient(135deg,var(--color-primary-deep) 0%,var(--color-primary) 100%);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast);box-shadow:0 2px 8px #7c9eff59}.chat-send-btn svg{width:16px;height:16px}.chat-send-btn:hover:not(:disabled){transform:scale(1.08);box-shadow:0 4px 14px #7c9eff80}.chat-send-btn:disabled{background:var(--bg-elevated);color:var(--text-tertiary);cursor:not-allowed;box-shadow:none;opacity:.5}.chat-send-btn.stop{background:#dc2626d9;box-shadow:0 2px 8px #dc26264d}.chat-send-btn.stop:hover{background:#ef4444f2;box-shadow:0 4px 14px #dc262666}.quick-suggestions{display:flex;flex-wrap:wrap;gap:8px;padding:8px 24px 16px;justify-content:center}.quick-suggestion-btn{display:flex;align-items:center;gap:7px;padding:8px 14px;border-radius:var(--radius-full);border:1px solid var(--border-medium);background:var(--bg-elevated);color:var(--text-secondary);font-size:12px;font-weight:500;cursor:pointer;transition:all var(--transition-fast);white-space:nowrap}.quick-suggestion-btn:hover{border-color:var(--color-primary-border);background:#7c9eff14;color:var(--color-primary);transform:translateY(-1px)}.quick-suggestion-btn svg{width:14px;height:14px;opacity:.5}.quick-suggestion-btn:hover svg{opacity:1}.landing-page{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--gradient-base);display:flex;flex-direction:column;z-index:100;animation:landing-fade-in .4s ease}@keyframes landing-fade-in{0%{opacity:0}to{opacity:1}}.landing-page:before{content:"";position:absolute;top:0;left:50%;transform:translate(-50%);width:800px;height:500px;background:radial-gradient(ellipse,rgba(124,158,255,.18) 0%,rgba(100,80,200,.08) 40%,transparent 70%);pointer-events:none}.landing-header{display:flex;align-items:center;justify-content:space-between;padding:24px 40px;position:relative;z-index:1}.landing-header-left{display:flex;align-items:center;gap:10px}.landing-header-logo{width:36px;height:36px;border-radius:var(--radius-md);background:linear-gradient(135deg,#7c9eff33,#a078ff26);display:flex;align-items:center;justify-content:center;border:1px solid rgba(124,158,255,.2)}.landing-header-logo svg{width:18px;height:18px;color:var(--color-primary)}.landing-header-title{font-family:var(--font-display);font-size:16px;font-weight:600;color:var(--text-primary);letter-spacing:-.01em}.landing-header-right{display:flex;align-items:center;gap:12px}.landing-header-btn{padding:8px 16px;border-radius:var(--radius-full);border:1px solid var(--border-medium);background:var(--bg-elevated);color:var(--text-secondary);font-size:13px;font-weight:500;cursor:pointer;transition:all var(--transition-fast);display:flex;align-items:center;gap:6px}.landing-header-btn:hover{border-color:var(--color-primary-border);color:var(--color-primary);background:#7c9eff14}.landing-header-btn svg{width:14px;height:14px}.landing-hero{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:0 32px;position:relative;z-index:1}.landing-greeting{font-family:var(--font-display);font-size:48px;font-weight:700;letter-spacing:-.03em;line-height:1.15;text-align:center;margin-bottom:8px;background:linear-gradient(135deg,#e8eaed,#9aa0b8,#7c9eff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.landing-subtitle{font-size:16px;color:var(--text-secondary);text-align:center;margin-bottom:48px;font-weight:400;letter-spacing:0}.landing-input-area{width:100%;max-width:760px;display:flex;flex-direction:column;gap:16px}.landing-input-wrapper{position:relative;display:flex;align-items:flex-end;background:var(--bg-surface);border:1.5px solid var(--border-medium);border-radius:var(--radius-xl);padding:16px 64px 16px 20px;transition:all var(--transition-fast);box-shadow:var(--shadow-md)}.landing-input-wrapper:focus-within{border-color:var(--color-primary);box-shadow:var(--shadow-md),0 0 0 4px #7c9eff1f}.landing-input{flex:1;background:transparent;border:none;outline:none;color:var(--text-primary);font-size:16px;font-family:var(--font-sans);font-weight:400;resize:none;line-height:1.5;min-height:24px;max-height:120px}.landing-input::placeholder{color:var(--text-tertiary)}.landing-send-btn{position:absolute;right:12px;bottom:12px;width:40px;height:40px;border-radius:50%;border:none;background:linear-gradient(135deg,var(--color-primary-deep) 0%,var(--color-primary) 100%);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast);box-shadow:0 2px 12px #7c9eff66}.landing-send-btn svg{width:18px;height:18px}.landing-send-btn:hover:not(:disabled){transform:scale(1.05);box-shadow:0 4px 18px #7c9eff80}.landing-send-btn:disabled{background:var(--bg-elevated);color:var(--text-tertiary);cursor:not-allowed;box-shadow:none;opacity:.5}.landing-chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:8px}.landing-chip{display:flex;align-items:center;gap:8px;padding:10px 18px;border-radius:var(--radius-full);border:1px solid var(--border-medium);background:var(--bg-elevated);color:var(--text-secondary);font-size:13px;font-weight:500;cursor:pointer;transition:all var(--transition-fast);white-space:nowrap}.landing-chip:hover{border-color:var(--color-primary-border);background:#7c9eff14;color:var(--color-primary);transform:translateY(-1px);box-shadow:0 4px 12px #0000004d}.landing-chip svg{width:14px;height:14px;opacity:.6}.landing-chip:hover svg{opacity:1;color:var(--color-primary)}.landing-footer{text-align:center;padding:20px 32px 28px;color:var(--text-tertiary);font-size:12px;position:relative;z-index:1}.landing-page.exiting{animation:landing-exit .35s ease forwards}@keyframes landing-exit{0%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(-20px)}}.welcome-screen{flex:1;display:flex;flex-direction:column;overflow-y:auto}.welcome-content{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 32px 20px;max-width:860px;width:100%;margin:0 auto}.welcome-brand{display:flex;flex-direction:column;align-items:center;margin-bottom:8px}.welcome-logo{width:56px;height:56px;border-radius:16px;background:var(--color-primary-deep);display:flex;align-items:center;justify-content:center;margin-bottom:16px;box-shadow:var(--shadow-glow)}.welcome-logo svg{width:28px;height:28px;color:#fff}.welcome-title{font-family:var(--font-display);font-size:28px;font-weight:700;color:var(--text-primary);letter-spacing:-.02em;line-height:1.2}.welcome-subtitle{font-size:14px;color:var(--text-secondary);margin-top:4px;font-weight:400}.welcome-greeting{font-family:var(--font-display);font-size:22px;font-weight:600;color:var(--text-primary);margin-top:32px;margin-bottom:28px;letter-spacing:-.01em}.welcome-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px;width:100%}.welcome-card{background:var(--bg-surface);border:1px solid var(--border-light);border-radius:var(--radius-lg);padding:18px 20px;transition:all var(--transition-fast)}.welcome-card:hover{border-color:var(--color-primary-border);background:#7c9eff0a;box-shadow:var(--shadow-md)}.welcome-card-header{display:flex;align-items:center;gap:8px;margin-bottom:12px}.welcome-card-header svg{width:18px;height:18px;color:var(--color-primary)}.welcome-card-category{font-size:13px;font-weight:600;color:var(--color-primary);letter-spacing:-.01em}.welcome-card-items{display:flex;flex-direction:column;gap:4px}.welcome-card-item{display:flex;flex-direction:column;gap:2px;padding:10px 12px;border-radius:var(--radius-md);border:none;background:transparent;text-align:left;cursor:pointer;transition:all var(--transition-fast);width:100%}.welcome-card-item:hover{background:var(--bg-elevated)}.welcome-card-item-text{font-size:13px;font-weight:500;color:var(--text-primary);line-height:1.4}.welcome-card-item-desc{font-size:11px;color:var(--text-tertiary);line-height:1.3}.welcome-input-area{display:flex;gap:10px;padding:20px 32px 28px;max-width:860px;width:100%;margin:0 auto;align-items:flex-end}.welcome-input-wrapper{flex:1;position:relative;display:flex;align-items:center}.welcome-input{flex:1;padding:14px 44px 14px 18px;border:1.5px solid var(--border-medium);border-radius:var(--radius-lg);font-size:14px;font-family:var(--font-sans);resize:none;outline:none;transition:all var(--transition-fast);background:var(--bg-surface);color:var(--text-primary);line-height:1.5;font-weight:400;box-shadow:var(--shadow-sm)}.welcome-input::placeholder{color:var(--text-tertiary);font-weight:400}.welcome-input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #7c9eff26,var(--shadow-md)}@media (max-width: 768px){.sidebar{display:none}.chat-container{max-width:100%}.chat-messages{padding:16px 12px}.message{padding:0 12px}.chat-input-area{padding:8px 12px 4px}.quick-suggestions{padding:8px 12px 12px}.message-content{max-width:90%}.welcome-cards{grid-template-columns:1fr}.welcome-content{padding:24px 16px 12px}.welcome-input-area{padding:16px 16px 20px}.welcome-title{font-size:22px}.welcome-greeting{font-size:18px;margin-top:20px;margin-bottom:20px}.landing-greeting{font-size:32px}.landing-subtitle{font-size:14px;margin-bottom:32px}.landing-header{padding:16px 20px}.landing-hero{padding:0 16px}.landing-input-area{max-width:100%}.landing-chips{gap:8px}.landing-chip{padding:8px 14px;font-size:12px}}