body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;margin:0}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}*{box-sizing:border-box;margin:0;padding:0}body{background:#f8f8f6;color:#111;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.app{min-height:100vh}.landing{margin:0 auto;max-width:900px;padding:60px 24px}.landing-header{margin-bottom:52px;text-align:center}.landing-header h1{color:#111;font-size:32px;font-weight:700;margin-bottom:14px}.landing-header p{color:#666;font-size:16px;line-height:1.7}.demo-grid{grid-gap:24px;display:grid;gap:24px;grid-template-columns:repeat(auto-fit,minmax(380px,1fr));margin-bottom:60px}.demo-card{background:#fff;border:1px solid #eee;border-radius:16px;padding:32px}.demo-card-header{border-left:4px solid;margin-bottom:20px;padding-left:14px}.demo-category{color:#888;font-size:12px;font-weight:500;letter-spacing:.05em;text-transform:uppercase}.demo-card-header h2{font-size:22px;font-weight:700;margin-top:4px}.demo-desc{color:#555;font-size:14px;line-height:1.7;margin-bottom:24px}.demo-examples{margin-bottom:28px}.examples-label{color:#aaa;font-size:12px;font-weight:500;margin-bottom:10px}.example-chip{border-bottom:1px solid #f0f0f0;color:#555;font-size:13px;line-height:1.5;padding:6px 0}.example-chip:last-child{border-bottom:none}.demo-btn{border:none;border-radius:10px;color:#fff;cursor:pointer;font-size:15px;font-weight:600;padding:14px;transition:opacity .2s;width:100%}.demo-btn:hover{opacity:.85}.landing-footer{background:#fff;border:1px solid #eee;border-radius:16px;padding:32px;text-align:center}.landing-footer p{color:#555;font-size:15px;margin-bottom:12px}.landing-footer a{border-bottom:2px solid #111;color:#111;font-size:15px;font-weight:600;padding-bottom:2px;text-decoration:none}.chatbot{background:#fff;display:flex;flex-direction:column;height:100vh;margin:0 auto;max-width:760px}.chat-header{align-items:center;border-bottom:1px solid #eee;display:flex;gap:16px;padding:16px 20px}.back-btn{background:none;border:1px solid #ddd;border-radius:8px;color:#555;cursor:pointer;font-size:13px;padding:6px 12px;white-space:nowrap}.chat-title .chat-category{color:#aaa;font-size:11px;letter-spacing:.05em;text-transform:uppercase}.chat-title h2{font-size:16px;font-weight:700}.chat-window{display:flex;flex:1 1;flex-direction:column;gap:12px;overflow-y:auto;padding:24px 20px}.welcome-msg{padding:20px 0 10px;text-align:center}.welcome-msg p{color:#888;font-size:14px;margin-bottom:16px}.example-btns{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.example-btn{background:#f5f5f5;border:none;border-radius:20px;color:#444;cursor:pointer;font-size:13px;padding:8px 14px;transition:background .2s}.example-btn:hover{background:#eee}.message{display:flex;flex-direction:column;max-width:75%}.message.user{align-items:flex-end;align-self:flex-end}.message.bot{align-items:flex-start;align-self:flex-start}.bubble{border-radius:16px;font-size:15px;line-height:1.7;padding:12px 16px;white-space:pre-wrap}.message.user .bubble{background:#111;border-bottom-right-radius:4px;color:#fff}.message.bot .bubble{background:#f3f3f3;border-bottom-left-radius:4px;color:#111}.bubble.loading,.sources{color:#aaa}.sources{font-size:11px;margin-top:4px;padding:0 4px}.input-area{border-top:1px solid #eee;display:flex;gap:8px;padding:16px 20px}.input-area input{background:#f8f8f8;border:1px solid #ddd;border-radius:24px;flex:1 1;font-size:15px;outline:none;padding:12px 16px}.input-area input:focus{background:#fff;border-color:#111}.input-area button{background:#111;border:none;border-radius:24px;color:#fff;cursor:pointer;font-size:15px;padding:12px 20px}.input-area button:disabled{background:#ccc;cursor:not-allowed}
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