:root{font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;color:#243247;background:#fafbfe;color-scheme:light}*{box-sizing:border-box}body{margin:0}header{height:88px;padding:18px 5vw;display:flex;align-items:center;justify-content:space-between;background:white;border-bottom:1px solid #e5eaf2}.brand{display:flex;align-items:center;gap:12px}.mark{display:grid;place-items:center;width:43px;height:43px;border-radius:12px;background:#3478f6;color:#fff;font-size:13px;font-weight:750}h1{font-size:19px;margin:0}.brand p{font-size:12px;color:#7a8798;margin:5px 0 0}button{border:1px solid #dce4ee;border-radius:9px;padding:10px 16px;background:#fff;color:#36506f;font:inherit;cursor:pointer}button:disabled{opacity:.5;cursor:wait}main{max-width:900px;margin:auto;padding:36px 24px 250px}#welcome{text-align:center;padding:8vh 8px 5vh}.eyebrow{font-size:11px;letter-spacing:2px;color:#7e8ba0}h2{font-size:29px;font-weight:600}#welcome p{color:#7a8798;line-height:1.8}.message{margin:20px 0;padding:20px 24px;border:1px solid #e5ebf4;border-radius:14px;background:#fff}.message.user{margin-left:12%;background:#edf4ff;border-color:#dfebff}.role{font-size:12px;font-weight:600;color:#75859c;margin-bottom:10px}.answer{white-space:pre-wrap;line-height:1.85;overflow-wrap:anywhere}.notice{color:#916520;border-left:3px solid #deb463;padding-left:10px;font-size:13px}.evidence{margin-top:18px;border-top:1px solid #e5ebf4;padding-top:12px}.evidence summary{color:#4b6e9a;cursor:pointer;font-size:13px}.source{padding:12px 0;scroll-margin-top:20px}.source h3{font-size:13px;margin:0 0 7px}.source p{font-size:13px;color:#60728b;white-space:pre-wrap;line-height:1.7}.source a{color:#3478f6}footer{position:fixed;bottom:0;left:0;right:0;padding:12px max(24px,calc((100vw - 852px)/2)) 16px;background:linear-gradient(transparent,#fafbfe 15%);border-top:1px solid #edf0f6}#status{font-size:12px;color:#73839b;margin:5px 0 9px}form{display:flex;gap:12px;padding:12px;background:white;border:1px solid #d5dfed;border-radius:14px;box-shadow:0 6px 25px #203b6010}textarea{width:100%;min-height:58px;max-height:150px;resize:vertical;border:0;outline:0;font:15px/1.65 "Segoe UI","Microsoft YaHei",sans-serif;color:#243247;background:#fff}#send{align-self:flex-end;background:#3478f6;color:white;border:0}.note{font-size:11px;line-height:1.6;color:#8896aa;margin-bottom:0}#error{color:#ad3434;font-size:13px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}@media(max-width:600px){header{padding:15px;height:76px}h1{font-size:16px}.brand p{font-size:11px}main{padding:20px 14px 260px}.message{padding:15px}.message.user{margin-left:6%}footer{padding:12px 14px}.note{font-size:10px}h2{font-size:25px}}

.chat-controls{display:flex;align-items:center;gap:16px}.model-picker{display:flex;align-items:center;gap:9px;font-size:13px;color:#60728b}.model-picker select{font:inherit;color:#243247;background:#fff;border:1px solid #dce4ee;border-radius:9px;padding:10px;max-width:240px;min-width:150px}.model-picker select:disabled{opacity:.6}@media(max-width:600px){header{height:auto;min-height:76px;flex-wrap:wrap;gap:14px}.chat-controls{width:100%;justify-content:space-between;gap:8px}.model-picker select{min-width:120px;max-width:48vw}.model-picker{gap:6px}}