/*.envelope{background: linear-gradient(to bottom right, rgba(72, 72, 212, 0), rgba(241, 104, 104, 0)), url('../img/contact1.png') center center no-repeat;
background-size: cover;width: 100%;height: 669px;position: relative;}*/
.envelope_title{position: absolute; padding: 8% 12%;top: 4%;left: 0;}
.kw{position: relative;background: ;}
.kw img{max-width: 100%;}

.start{font-size: 0.2rem;color: #757575;}
.content{color: #777878;line-height: 0.8rem;padding: 0 4%;font-size: 0.2rem;}
.letter{background: url("../img/contact2.jpg")center center no-repeat; background-size: cover;width: 100%;height: 428px;position: relative;margin-bottom: 1rem;}
.letter_name{line-height: 48px;margin-left: 16px;}
.letter_content{}
.wx{font-size: 14px;color: #656565;text-align: center;margin-top: 12px;}
.letter_left{}
.letter_contents{position: absolute;left: 0;top: 42%;}
.a4{font-size: 0.3rem;font-weight: 600;}.dis-tc{width: 100%;    height: auto;    display: flex;    justify-content: center;    align-items: center;}
@media screen and (max-width: 700px){
	.kw img {max-width: 100%;height: 21rem;}
	.letter_contents{position: absolute;left: 0;top: 25%;}
}