*{box-sizing:border-box}body{margin:0;background:#f4f5f7;color:#272727;font:15px/1.6 Arial,"Microsoft YaHei",sans-serif}.chat{max-width:720px;margin:auto;height:100dvh;min-height:480px;display:flex;flex-direction:column;background:white}header{display:flex;align-items:center;gap:18px;padding:14px 18px;border-bottom:1px solid #eee}header h1{font-size:19px;margin:0;flex:1}header a{color:#8a641d;text-decoration:none}header span{font-size:12px;color:#777}.intro{font-size:12px;padding:12px 18px;margin:0;background:#fbf7ee;color:#806b44}#state{font-size:12px;color:#666;margin:8px 18px}#messages{flex:1;min-height:100px;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:14px}.message{max-width:86%;align-self:flex-start}.message.visitor{align-self:flex-end}.message small{display:block;font-size:11px;color:#777}.message p{padding:10px 14px;margin:3px 0;background:#f1f2f5;border-radius:12px;white-space:pre-wrap;overflow-wrap:anywhere}.message.visitor p{background:#f7ecd5}form{border-top:1px solid #eee;padding:12px 16px;padding-bottom:max(12px,env(safe-area-inset-bottom))}label{font-size:12px}textarea{display:block;width:100%;resize:vertical;border:1px solid #ddd;border-radius:8px;padding:10px;font:inherit;max-height:140px}.send-row{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:8px}.send-row span{font-size:11px;color:#888}button{border:0;border-radius:6px;padding:9px 25px;background:#977127;color:white;font:inherit;cursor:pointer}button:disabled{opacity:.5;cursor:wait}