h1 {
        font-size: 3em;
        letter-spacing: 2px;
        color: transparent; /* 初始文字颜色透明 */
        background: linear-gradient(45deg, #ff7e5f, #feb47b, #86a8e7, #91eae4);
        background-size: 400% 400%;
        -webkit-background-clip: text;
        animation: gradientText 15s ease infinite;
        text-shadow: 0 0 10px rgba(0, 0, 0, 0.1); /* 添加轻微的阴影效果 */
    }

    @keyframes gradientText {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }