.banner {
    background-image: url('../img/banner3.png');
    background-size: 100% 100%;
}

.content-main {
    width: 1440px;
    margin: 80px auto;
}

.content-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 50px;
}

.content-top img {
    width: 631px;
    height: 403px;
}


.content-text {
    width: 720px;
    font-weight: bold;
    position: relative;
}

.content-text .block1 {
    position: absolute;
    top: -60px;
    left: -60px;
    z-index: -1;
    width: 140px;
    height: 140px;
    -webkit-transform: rotate(360deg);

    animation: rotation 45s linear infinite;

    -moz-animation: rotation 45s linear infinite;

    -webkit-animation: rotation 45s linear infinite;

    -o-animation: rotation 45s linear infinite;
}

.content-text .block1 img,
.content-text .block2 img {
    width: 100%;
    height: 100%;
}

@-webkit-keyframes rotation {

    from {
        -webkit-transform: rotate(0deg);
    }

    to {
        -webkit-transform: rotate(360deg);
    }

}

.content-text .block2 {
    position: absolute;
    top: -60px;
    left: -60px;
    z-index: -1;
    width: 28px;
    height: 28px;
    -webkit-transform: rotate(360deg);

    animation: rotation 45s linear infinite;

    -moz-animation: rotation 45s linear infinite;

    -webkit-animation: rotation 45s linear infinite;

    -o-animation: rotation 45s linear infinite;
}

.content-text .first {
    font-size: 24px;
    background: linear-gradient(to right, #004a9d, #5dc2d0);
    -webkit-text-fill-color: transparent;
    -webkit-background-clip: text;

}

.content-text .second {
    font-size: 30px;
    line-height: 2;
    color: #004a9d;
}

.content-text h2 {
    font-size: 72px;
    letter-spacing: 5px;
    background: linear-gradient(to right, #004a9d, #5dc2d0);
    -webkit-text-fill-color: transparent;
    -webkit-background-clip: text;
    font-weight: bold;
    font-family: Tahoma, "Times New Roman", Cambria, Times, "serif";
}

.content-desc p {
    font-size: 16px;
    line-height: 28px;
    margin-bottom: 10px;
    color: #333;
}
@media screen and (max-width:960px) {
    .content-main{
        width: 100%;
    }
    .content-top {
        width: 90%;
        display: block;
        margin: 0 auto;
        margin-bottom: 50px;
    }
    .content-top img{
        width: 100%;
        height: 220px;
    }
    .content-text{
        width: auto;
    }
    .content-text h2{
        font-size: 48px;
    }
    .content-desc p{
        width: 90%;
        margin: 0 auto;
    }
    .content-text .block1{
        width: 80px;
        height: auto;
        top: -20px;
        left: 0;
    }
    .content-text .block2{
        width: 21px;
        height: auto;
        top: -30px;
        left: -5px;
    }
    .content-text .second{
        font-size: 20px;
    }
}