body{font-family:Arial,Helvetica,sans-serif;margin:0;padding:0;background:#f5f6f8}.app header{background:#111;color:#fff;padding:12px 16px}.singleChat main{max-width:960px;margin:0 auto;padding:16px}.chatConfig{display:flex;gap:8px;margin-bottom:12px}.chatConfig input{flex:1;min-width:0;border:1px solid #d0d5dd;border-radius:8px;padding:10px 12px}.chatPanel{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:12px}.chatHeader{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.chatHeader h2{margin:0;font-size:18px}.newChatBtn{border:1px solid #d0d5dd;background:#fff;border-radius:8px;padding:6px 12px;cursor:pointer;font-size:14px}.newChatBtn:hover{background:#f5f6f8}.logoutBtn{border:none;background:transparent;color:#aaa;cursor:pointer;font-size:13px}.emptyChat{text-align:center;color:#999;padding:40px 0}.msg-user{text-align:right}.msg-user .msgRole{color:#333;font-weight:700;margin-right:6px}.msg-assistant .msgRole{color:#e44;font-weight:700;margin-right:6px}.msg-system{text-align:center;color:#999;font-size:13px}.msgContent{white-space:pre-wrap}.chatWindow{height:60vh;overflow:auto;border:1px solid #e5e7eb;border-radius:8px;padding:8px;margin:8px 0 10px;background:#fbfbfc}.msg{padding:8px;border-bottom:1px solid #eceff3;white-space:pre-wrap}.chatForm{display:flex;flex-direction:column;gap:8px;border:1px solid #d0d5dd;border-radius:12px;padding:8px;background:#fff}.imagePreviewList{display:flex;flex-wrap:wrap;gap:8px;padding-bottom:4px}.previewItem{position:relative;width:60px;height:60px}.previewItem img{width:100%;height:100%;object-fit:cover;border-radius:6px;border:1px solid #e5e7eb}.removeImgBtn{position:absolute;top:-4px;right:-4px;background:#333;color:#fff;border:none;border-radius:50%;width:18px;height:18px;font-size:10px;cursor:pointer;display:flex;align-items:center;justify-content:center}.chatInputWrapper{display:flex;align-items:flex-end;gap:8px}.chatForm textarea{flex:1;border:none;border-radius:4px;padding:8px;font-size:15px;resize:none;max-height:200px;outline:none;font-family:inherit}.chatForm .btnGroup{display:flex;gap:4px}.chatForm .iconBtn{border:none;background:#f5f6f8;color:#333;border-radius:8px;padding:8px;cursor:pointer}.chatForm .submitBtn{border:none;background:#111;color:#fff;border-radius:8px;padding:8px 16px;cursor:pointer}.chatForm .submitBtn:disabled{opacity:.3;cursor:not-allowed}