.back {
    position: fixed;
    right: 0;
    bottom: 5%;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    background-color: #fff;
    box-shadow: 0px 0px 10px #ccc;
    z-index: 99999;
}
.back img {
    width: 40px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
}
.rjpt .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.rjpt .left {
    width: 46.5%;
}

.rjpt .left img {
    width: 100%;
}

.rjpt .right {
    width: 42%;
}

.rjpt p:nth-child(2) {
    font-size: 32px;
    color: #121212;
    line-height: 1;
    margin-bottom: 30px;
}

.rjpt p:nth-child(2) ~ p {
    font-size: 15px;
    line-height: 30px;
}

.solve {
    background-image: url("../image/i1-bg.jpg");
    /* background-image: url("../images/i1-bg.png"); */
    background-position: center center;
    background-size: cover;
}

.solve .title {
    color: #fff;
    text-align: center;
    margin-bottom: 35px;
}

.solve .title p {
    color: #fff !important;
}

.solve img {
    width: 100%;
}

@media (max-width: 1440px) {
    .rjpt .container > div {
        width: calc(50% - 40px);
    }

    .rjpt p:nth-child(2) {
        font-size: 24px;
        margin-bottom: 15px;
    }

}

@media (max-width: 1260px) {

}

@media (max-width: 992px) {
    .rjpt .container > div {
        width: calc(50% - 15px);
    }

}

@media (max-width: 767px) {
    .rjpt .container {
        flex-wrap: wrap;
    }

    .rjpt .container > div {
        width: 100%;
    }

    .rjpt .container > .left {
        margin-bottom: 25px;
    }

    .rjpt p:nth-child(2) ~ p {
        font-size: 14px;
        line-height: 28px;
    }

    .solve .title {
        margin-bottom: 15px;
    }

    .solve .title p {
        margin-bottom: 15px;
    }
}

@media (max-width: 414px) {

}