body {
            font-family: 'Noto Sans TC', sans-serif;
            background-color: #FAFAFA;
            color: #333333;
        }
        /* Custom timeline line */
        .step-line::before {
            content: '';
            position: absolute;
            left: 2rem;
            top: 4rem;
            bottom: -2rem;
            width: 2px;
            background-color: #E5E7EB;
            z-index: 0;
        }
        @media (max-width: 768px) {
            .step-line::before {
                left: 1.5rem;
            }
        }
        /* Hide scrollbar for clean chat preview */
        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }
        .no-scrollbar {
            -ms-overflow-style: none;  /* IE and Edge */
            scrollbar-width: none;  /* Firefox */
        }
        .bubble-tail-left::before {
            content: '';
            position: absolute;
            left: -8px;
            top: 12px;
            border-top: 8px solid transparent;
            border-bottom: 8px solid transparent;
            border-right: 12px solid white;
        }