.center {
    width: 1200px;
    margin: 0 auto;
    position: relative;
}

.items {
    padding: 60px 0;
    overflow: hidden;
}

.transition {
    transition: all .3s ease;
}

.main-title {
    font-size: 30px;
    text-align: center;
    margin-bottom: 50px;
}

.items-steps {
    background-color: #F6F6F6;
}

    .items-steps .items-block {
        height: 432px;
        position: relative;
        margin: 90px 0 30px;
    }

.img-block {
    margin: 0 auto;
    display: block;
}

    .img-block img {
        display: block;
        margin: 0 auto;
        max-width: 100%;
    }

.items-steps .item {
    position: absolute;
    top: 0;
    width: 156px;
    height: 186px;
    background-color: #fff;
    border-radius: 5px;
    transform: translateX(-78px);
    z-index: 1;
    box-shadow: 0 0 5px 2px rgba(135, 135, 135, 0.15);
    backface-visibility: hidden;
}

    .items-steps .item:before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: #fff;
        border-radius: 5px;
        z-index: -1;
    }

    .items-steps .item:after {
        content: "";
        position: absolute;
        width: 15px;
        height: 15px;
        left: 50%;
        bottom: -7px;
        box-shadow: 0 0 5px 2px rgba(135, 135, 135, 0.15);
        background-color: #fff;
        z-index: -2;
        transform: translateX(-50%) rotateZ(135deg);
    }

    .items-steps .item.cur {
        margin-top: -10px;
    }

    .items-steps .item.even {
        top: auto;
        bottom: 0;
    }

        .items-steps .item.even:after {
            top: -7px;
            bottom: auto;
        }

        .items-steps .item.even.cur {
            margin-bottom: -10px;
        }

    .items-steps .item:nth-child(1),
    .items-steps .step:nth-child(1) {
        left: 75px;
    }

    .items-steps .item:nth-child(2),
    .items-steps .step:nth-child(2) {
        left: 200px;
    }

    .items-steps .item:nth-child(3),
    .items-steps .step:nth-child(3) {
        left: 325px;
    }

    /*.items-steps .item:nth-child(4),
    .items-steps .step:nth-child(4) {
        left: 525px;
    }*/
    .items-steps .item:nth-child(4) {
        left: 565px;
    }
    .items-steps .step:nth-child(4) {
        left: 565px;
    }

.items-steps .item:nth-child(5) {
    left: 620px;
}

.items-steps .step:nth-child(5) {
    left: 565px;
}

.items-steps .item:nth-child(6) {
    left: 810px;
}
    .items-steps .step:nth-child(6) {
        left: 755px;
    }

.items-steps .item:nth-child(7) {
    left: 940px;
}
    .items-steps .step:nth-child(7) {
        left: 940px;
    }

.items-steps .item:nth-child(8) {
    left: 1125px;
}
    .items-steps .step:nth-child(8) {
        left: 1125px;
    }

.items-steps .img-block {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: #fff;
    margin-top: -35px;
    position: relative;
    transition-duration: 1s;
}

    .items-steps .img-block:before {
        content: "";
        width: 100%;
        height: 100%;
        box-shadow: 0 0 5px 2px rgba(135, 135, 135, 0.15);
        position: absolute;
        z-index: -2;
        border-radius: 50%;
        left: 0;
        top: 0;
    }

    .items-steps .img-block img {
        position: relative;
        top: 50%;
        transform: translateY(-50%);
    }

.items-steps .item:hover .img-block {
    transform: rotateZ(360deg);
}

.items-steps .item-title {
    font-size: 18px;
    text-align: center;
    margin-bottom: 10px;
}

.items-steps .item-p {
    color: #999;
    text-align: center;
    margin-bottom: 5px;
}

.items-steps .item.even .item-title {
    margin-top: 15px;
}

.items-steps .item.even .img-block {
    margin: 0 0 0 -35px;
    position: absolute;
    left: 50%;
    bottom: -35px;
}

.items-steps .item-col2 {
    width: 267px;
    transform: translateX(-133.5px);
}

    .items-steps .item-col2 .flex-row {
        justify-content: space-around;
        display: flex;
        flex-direction: row;
        align-items: center;
    }

    .items-steps .item-col2 .item-p {
        text-align: left;
    }

.items-steps .steps-block {
    position: absolute;
    height: 24px;
    width: 100%;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
}

.steps-block2 {
    position: absolute;
    height: 24px;
    width: 100%;
    top: 10%;
    left: 0;
    transform: translateY(-50%);
}
.steps-block2:before {
    content: "";
    position: absolute;
    width: 50%;
    height: 8px;
    background-color: #E9E9E9;
    border-radius: 2px;
    left: 50%;
    top: 50%;
    transform: translateY(-50%);
}
.steps-block2:after {
    content: "";
    position: absolute;
    width: 26px;
    height: 38px;
    background: url(../img/liucheng/items-steps-arrow.png) no-repeat center;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
}

    .items-steps .steps-block:before {
        content: "";
        position: absolute;
        width: 99.4%;
        height: 8px;
        background-color: #E9E9E9;
        border-radius: 2px;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
    }

    .items-steps .steps-block:after {
        content: "";
        position: absolute;
        width: 26px;
        height: 38px;
        background: url(../img/liucheng/items-steps-arrow.png) no-repeat center;
        right: 0;
        top: 50%;
        transform: translateY(-50%);
    }

.items-steps .step {
    position: absolute;
    width: 24px;
    height: 24px;
    background-color: #fff;
    border-radius: 50%;
    transform: translateX(-12px);
    box-shadow: 0 0 8px 0 rgba(0, 0, 0, .2);
}

    .items-steps .step:before {
        content: "";
        position: absolute;
        width: 10px;
        height: 10px;
        background-color: #FFAE12;
        border-radius: 50%;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        transition: all .3s ease;
    }

    .items-steps .step.cur:before {
        width: 100%;
        height: 100%;
    }

.rollInLeft {
    animation-name: rollInLeft;
}

.rollInLeft1 {
    animation-name: rollInLeft1;
}

@keyframes rollInLeft {
    0% {
        opacity: 0;
        transform: translateX(-100%) rotateY(-180deg);
    }

    100% {
        opacity: 1;
        transform: translateX(-78px) rotateY(0deg);
    }
}

@keyframes rollInLeft1 {
    0% {
        opacity: 0;
        transform: translateX(-100%) rotateY(-180deg);
    }

    100% {
        opacity: 1;
        transform: translateX(-133.5px) rotateY(0deg);
    }
}