.image-wrapper {
    display: block;
    width: 100%;
    border-radius:3px;
}

.promo-block {
    min-height: 255px;
    background-image: url(images/promo.jpg);
    background-size: cover;
    background-position: center;
}
@media (max-width: 1223px) and (min-width: 1024px){
    .content .parent_doc-block .block_title {
        font-size: 2.4vh!important;
    }
}
.promo-block .info {
    background-image: url(images/infobg.png);
    background-position: center bottom;
    background-repeat: no-repeat;
    margin-top: 95px;
    margin-bottom: 65px;
    margin-left: 15px;
    margin-right: 15px;
    background-color: white;
    border-radius: 3px;
    max-width: 540px;
    width: 100%;
    float: left;
    padding: 40px 45px 115px;
}

.snake-block {
    padding-top: 140px;
    background-image: url(images/snake.jpg);
    background-position: center 60px;
    background-repeat: no-repeat;
}

.snake-block .parent_one-block {
    padding: 0 15px;
    width: 100%;
}
.snake-block .parent_one-block:after {
    content: '';
    clear: both;
    display: block;
}
.snake-block .parent_one-block>.one-block {
    float: left;
    width: calc(50% - 20px);
    margin-right: 20px;
}
.snake-block .parent_one-block>.two-block {
    float: left;
    width: 50%;
}

.snake-block .parent_two-block {
    padding: 0 15px;
    width: 100%;
}
.snake-block .parent_two-block:after {
    content: '';
    clear: both;
    display: block;
}
.snake-block .parent_two-block>.one-block {
    float: left;
    width: calc(50% - 20px);
    margin-right: 20px;
}
.snake-block .parent_two-block>.two-block {
    float: left;
    width: 50%;
	margin-top: 0px;
}
.snake-block .parent_two-block>.one-block .block_title {
    margin-top: 15px;
}

.snake-block .parent_three-block {
    padding: 0 15px;
    width: 100%;
    margin-top: 40px;
}
.snake-block .parent_three-block:after {
    content: '';
    clear: both;
    display: block;
}

.snake-block .parent_four-block {
    padding: 0 15px;
    width: 100%;
}
.snake-block .parent_four-block:after {
    content: '';
    clear: both;
    display: block;
}
.snake-block .parent_four-block>.one-block {
    float: left;
    width: calc(50% - 20px);
    margin-right: 20px;
}
.snake-block .parent_four-block>.two-block {
    float: left;
    width: 50%;
}

.image-wrapper1_1 {
    max-width: 50%;
    float: right;
}

.image-wrapper3 {
    margin-top: 120px;
}

.image-wrapper4 {
    max-width: 380px;
    float: left;
}

.icon_box {
    float: left;
}
.icon_box.icon_box_1_one {
    width: calc(50% - 20px);
    margin-right: 20px;
}
.icon_box.icon_box_1_two {
    width: 50%;
}
.icon_box.icon_box_2_one {
    width: calc(25% - 45px);
    margin-right: 45px;
}
.icon_box.icon_box_2_two {
    width: calc(25% - 45px);
    margin-right: 45px;
}
.icon_box.icon_box_2_three {
    width: calc(25% - 45px);
    margin-right: 45px;
}
.icon_box.icon_box_2_four {
    width: 25%;
}
.icon_box img {
    display: block;
    height: 50px;
}
.icon_box .title {
    font-family: Cambria;
    font-weight: bold;
    font-size: 1.8rem;
    line-height: 2.2rem;
    color: #252525;
}
.icon_box .desc {
    font-size: 1.4rem;
    line-height: 1.8rem;
    color: #676767;
}

.block_title {
    font-family: Cambria;
    font-size: 3.0rem;
    line-height: 3.2rem;
    color: #252525;
    font-weight: bold;
}
.block_mini_title {
    font-family: Cambria;
    font-size: 2.4rem;
    line-height: 2.6rem;
    color: #252525;
    font-weight: bold;
}
.block_mini_mini_title {
    font-size: 1.6rem;
    line-height: 1.8rem;
    color: #000000;
    font-weight: bold;
}
.mini-line_green {
    width: 86px;
    height: 4px;
    background-color: #65b22f;
}
.video-block {
    display: flex;
    background-color: #f9e7b5;
    border-radius: 3px;
	max-height: 111px;
}

.video-block img {
    float: left;
    margin-right: 20px;
    border-radius: 3px 0 0 3px;
}

.video-block .info {
    float: left;
    padding-top: 20px;
}

.video-block .info .title {
    font-family: Cambria;
    font-size: 1.8rem;
    line-height: 2.2rem;
    color: #252525;
}

.visible-span {
    display: none;
}

.video-block .info .time {
    font-size: 1.4rem;
    line-height: 1.6rem;
    color: #676767;
}
@media (max-width:1280px){
    .snake-block {
        padding-top: 50px;
        background-image: none;
    }
    .snake-block .parent_three-block {
        margin-top: 0px;
    }
    .snake-block .parent_four-block {
        margin-top: 40px;
    }
    .image-wrapper3 {
        margin-top: 0px;
    }
    .image-wrapper2 {
        margin-bottom: 0 !important;
    }
}
@media (max-width:1223px){
    .snake-block .parent_one-block>.one-block {
        display: none;
        float: none;
        width: calc(100% - 0px);
        margin-right: 0px;
    }
    .snake-block .parent_one-block>.two-block {
        float: none;
        width: calc(100% - 0px);
        margin-right: 0px;
    }
    .snake-block .parent_two-block>.one-block .block_title {
        margin-top: 15px;
    }
    .snake-block .parent_four-block>.one-block {
        display: none;
        float: none;
        width: calc(100% - 0px);
        margin-right: 0px;
    }
    .snake-block .parent_four-block>.two-block {
        float: none;
        width: calc(100% - 0px);
        margin-right: 0px;
    }
    .image-wrapper4 {
        display: none;
    }
}
@media (max-width:1023px){
    .parent_three-block .clearing {
        clear: both;
    }
    .icon_box.icon_box_2_one {
        width: calc(50% - 20px);
        margin-right: 20px;
    }
    .icon_box.icon_box_2_two {
        width: calc(50% - 0px);
        margin-right: 0px;
    }
    .icon_box.icon_box_2_three {
        width: calc(50% - 20px);
        margin-right: 20px;
    }
    .icon_box.icon_box_2_four {
        width: 50%;
    }
    .snake-block .parent_two-block>.one-block {
        float: none;
        width: calc(100% - 0px);
        margin-right: 0px;
    }
    .snake-block .parent_two-block>.two-block {
        float: none;
        width: calc(100% - 0px);
        margin-right: 0px;
		margin-top: 0px; 
		padding-bottom: 30px;

    }
}
    .snake-block .parent_four-block>.one-block {
        display: block;
    }
@media (max-width:767px) {
    .promo-block .content {
        padding-left: 0px;
        padding-right: 0px;
    }
    .promo-block .content .info {
        margin-left: 0px;
        margin-right: 0px;
        padding: 40px 30px 100px;
    }
    .button-group {
        text-align: center;
    }
    .icon_box {
        float: none;
    }
    .icon_box img{
        display: inline-block;
    }
    .icon_box:after {
        content: '';
        display: block;
        clear: both;
    }
    .icon_box.icon_box_1_one {
        width: calc(100% - 0px);
        margin-right: 0px;
        text-align: center;
    }
    .icon_box.icon_box_1_two {
        width: calc(100% - 0px);
        margin-left: 0px;
        text-align: center;
    }
    .icon_box.icon_box_1_three {
        width: calc(100% - 0px);
        margin-right: 0px;
        text-align: center;
    }
    
    .icon_box.icon_box_2_one {
        width: calc(100% - 0px);
        margin-right: 0px;
        text-align: center;
    }
    .icon_box.icon_box_2_two {
        width: calc(100% - 0px);
        margin-left: 0px;
        text-align: center;
    }
    .icon_box.icon_box_2_three {
        width: calc(100% - 0px);
        margin-right: 0px;
        text-align: center;
    }
    .icon_box.icon_box_2_four {
        width: calc(100% - 0px);
        margin-left: 0px;
        text-align: center;
    }
}

@media (max-width:479px) {
    .snake-block .parent_one-block>.one-block {
        display: block;
    }
    .image-wrapper1_1 {
        display: none;
    }
    .promo-block .content .info {
        margin-top: 0px;
        margin-bottom: 0px;
        margin-left: 0px;
        margin-right: 0px;
        padding: 40px 30px 80px;
    }
    .parent_one-block .two-block .block_title {
        font-size: 2.7rem;
        line-height: 2.9rem;
    }
	
	.icon_box img {
        margin: auto;
	}
	
	.icon_box.icon_box_1_one {
		width: 100% ;
		text-align:center;
	}
	.icon_box.icon_box_1_two {
		width: 100% ;
		text-align:center;
	}
    
    .icon_box.icon_box_2_one {
        width: calc(100% - 0px);
        text-align:center;
        margin-right: 0px;
    }
    
     .icon_box.icon_box_2_two {
        width: calc(100% - 0px);
        text-align:center;
        margin-right: 0px;
    }
    .video-block .info .title {
        font-size: 1.6vh;
        line-height: 1.4rem;
    }
}
@media(max-width: 1024px) {
	.snake-block .parent_four-block>.one-block {
		display: flex;
		justify-content: center;
	}
	.parent_four-block .one-block .image-wrapper {
		width: 60%;
	}
	.parent_two-block .two-block .image-wrapper {
		width: 70%;
		height: 70%;
	}
	.snake-block .parent_two-block>.two-block {
		display: flex;
		justify-content: center;
	}
}
@media(max-width: 768px) {
	.parent_two-block .two-block .image-wrapper {
		width: 100%;
	}
}
@media(max-width: 320px) {
	.video-block .info .title {
		margin-right: 10px;
	}
}