body {
            font-family: 'Inter', sans-serif;
            background-color: #f7f9fc;
            /* 浅灰色背景 */
        }

        /* 自定义滚动条样式，使其更美观 */
        #chat-history::-webkit-scrollbar {
            width: 8px;
        }

        #chat-history::-webkit-scrollbar-thumb {
            background-color: #cbd5e1;
            /* 浅蓝色滑块 */
            border-radius: 4px;
        }

        #chat-history::-webkit-scrollbar-track {
            background: #f1f5f9;
        }

        /* 等待动画样式 */
        .loading-dots span {
            animation: bounce 0.6s infinite alternate;
        }

        .loading-dots span:nth-child(2) {
            animation-delay: 0.2s;
        }

        .loading-dots span:nth-child(3) {
            animation-delay: 0.4s;
        }

        @keyframes bounce {
            0% {
                transform: translateY(0);
            }

            100% {
                transform: translateY(-4px);
            }
        }