.main_section {
    width: 100%;
    margin: 30px 0;
    padding: 40px 0;
    background-color: #f4f5f7;
}

.main_section .tg_advantage {
    margin: 0 auto;
    width: 1200px;
}

.main_section .tg_advantage .tg_adv_msg {
    margin-top: 18px;
    width: 100%;
    color: #a7a7a8;
    text-align: center;
}

.main_section .tg_advantage .tg_adv_wrap {
    position: relative;
}

.main_section .tg_advantage  .tg_adv_wrap .tg_adv_cent {
    position: absolute;
    top: calc(50% - 170px);
    left: 50%;
    width: 219px;
    height: 219px;
    margin-left: -110px;
    border-radius: 50%;
}

.main_section .tg_advantage  .tg_adv_wrap .tg_adv_cent .tg_adv_icon {
    display: block;
    height: 100%;
    width: 100%;
    transition: all 1s ease-out;
    opacity: 0.8;
}

.main_section .tg_advantage  .tg_adv_wrap .tg_adv_cent .circle_tag {
    animation: circle-icon 4s linear infinite;
}

.main_section .tg_advantage  .tg_adv_wrap .tg_adv_cent .circle_1 {
    transform: rotateZ(30deg);
}

.main_section .tg_advantage  .tg_adv_wrap .tg_adv_cent .circle_2 {
    transform: rotateZ(160deg);
}

.main_section .tg_advantage  .tg_adv_wrap .tg_adv_cent .circle_3 {
    transform: rotateZ(-5deg);
}

.main_section .tg_advantage  .tg_adv_wrap .tg_adv_cent .circle_4 {
    transform: rotateZ(205deg);
}

.main_section .tg_advantage .tg_adv_wrap .tg_adv_content {
    display: flex;
    -ms-flex-pack: justify;
    justify-content: space-between;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    width: 100%;
}


.main_section .tg_advantage .tg_adv_wrap .tg_adv_content li {
    position: relative;
    display: -ms-flexbox;
    display: flex;
    width: 470px;
}

.main_section .tg_advantage .tg_adv_wrap .tg_adv_content li:nth-child(2n+0) {
    /*margin-left: 300px;*/
}

.main_section .tg_advantage .tg_adv_wrap .tg_adv_content li:nth-child(n+3) {
    margin-top: 50px;
}

.main_section .tg_advantage .tg_adv_wrap .tg_adv_content li:hover .adv_detail_line:before {
    top: -3px;
    right: 71px;
    opacity: 1;
}
.main_section .tg_advantage .tg_adv_wrap .tg_adv_content li .tg_adv_detail {
    width: 390px;
}

.main_section .tg_advantage .tg_adv_wrap .tg_adv_content li .tg_adv_detail .adv_detail_title {
    font-size: 22px;
    color: #2277e6;
    font-weight: 500;
    transition: color 0.3s;
}

.main_section .tg_advantage .tg_adv_wrap .tg_adv_content li .tg_adv_detail .adv_detail_info {
    line-height: 24px;
    height: 170px;
}

.main_section .tg_advantage .tg_adv_wrap .tg_adv_content li .adv_detail_icon {
    margin: 0 5px;
    width: 70px;
    height: 70px;
    display: inline-block;
}

.main_section .tg_advantage .tg_adv_wrap .tg_adv_content li .adv_detail_line {
    right: -24px;
    bottom: 98px;
    transform: rotateZ(-135deg);
    position: absolute;
    width: 70px;
    height: 1px;
    display: inline-block;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0));
}

.main_section .tg_advantage .tg_adv_wrap .tg_adv_content li:nth-child(2n+0) .adv_detail_line {
    left: -24px;
    bottom: 98px;
    transform: rotateZ(-35deg);
}

.main_section .tg_advantage .tg_adv_wrap .tg_adv_content li:nth-child(3) .adv_detail_line {
    right: -24px;
    top: -26px;
    transform: rotateZ(135deg);
}

.main_section .tg_advantage .tg_adv_wrap .tg_adv_content li:nth-child(4) .adv_detail_line {
    left: -23px;
    top: -26px;
    transform: rotateZ(35deg);
}

.main_section .tg_advantage .tg_adv_wrap .tg_adv_content .adv_detail_line:before {
    content: "";
    position: absolute;
    top: -3px;
    right: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    box-shadow: 0 0 15px rgba(47, 204, 255, 0.5);
    background: radial-gradient(rgba(30, 162, 255, 0.7), rgba(30, 162, 255, 0.2));
    opacity: 0;
    transition: all .3s;
}

.main_section .tg_advantage .tg_adv_wrap .tg_adv_content .adv_detail_line:after {
    content: "";
    position: absolute;
    top: -3px;
    left: -9px;
    width: 6px;
    height: 6px;
    border: 1px solid rgba(0, 0, 0, 0.7);
    border-radius: 50%;
}

.text_right {
    text-align: right;
}

.text_left {
    text-align: left;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(-360deg);
    }
}