.video-text h2{font-size: 3.2rem;    margin-bottom: 20px;    color: #fffffff2;    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.5);    font-weight: 700;    letter-spacing: 1px;}
.video-text p{font-size: 1.4rem;    line-height: 1.7;    margin-bottom: 0px;    text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.5);    max-width: 700px;    margin-left: auto;    margin-right: auto;}

/* 动画效果 */
        .fade-in h2 {
            animation: fadeIn 1.5s ease forwards;}
        
        .fade-in p {
            animation: fadeIn 1.5s ease 0.5s forwards;
            opacity: 0;}
        
        .fade-in .btn {
            animation: fadeIn 1.5s ease 1s forwards;
            opacity: 0;}
        
        @keyframes fadeIn {
            from { opacity: 0;}
            to { opacity: 1;}
        }
        
@media only screen and (max-width:767px){
.video-text h2{font-size: 2.1em;}
.video-text p{font-size: 1.2em;}
}