/* 腕表保养 */
.by_pic{ width: 100%; overflow: hidden; position: relative;}
.by_pic img{ width: 100%;}
.by_con{ position: absolute; left: 0; top: 0; width: 50%; height: 100%;}
.by_con h3,.by_con p{text-align: left;width: 100%; margin-left: 25%;}
.by_con p,.by_con1 p{ font-size: 16px; margin-top: 20px;}
.by_small{ margin-top: 100px; width:100%;}
.by_small .by_width{ margin: 0 auto 86px; width: 35%; overflow: hidden;}
.by_width img{ width: 100%;}
.by_width h3{ text-align:center; font-size: 24px; margin-top: 40px;}
.by_width p{ text-align:center; font-size: 16px; margin-top: 20px; line-height: 26px;}
.by_con1{position: absolute; right: 0; top: 0; width: 50%; height: 100%;}
.by_con1 h3,.by_con1 p{ color: #fff; text-align: left; width: 100%;}
.z-over{ overflow: hidden;}

@media (max-width:640px ) {
.by_con{ position: absolute; left: 0; right: 0; margin: auto; top: 15%; width: 90%; height: 100%; text-align: center;}
.by_con h3, .by_con p{margin-left: 0; font-weight: 400;}
.by_small .by_width{ width: 90%;}
.by_con1{ position: absolute; left: 0; right: 0; margin: auto; top: 15%; width: 90%; height: 100%; text-align: center;}
.by_con1 h3, .by_con1 p{margin-left: 0; font-weight: 400;}
.by_width h3 {text-align: center;font-size: 21px;}
.by_width p {font-size: 13px;}
.by_small .by_width {margin: 0 auto 36px;}
.by_small {margin-top: 30px;}
.by_con p, .by_con1 p {font-size: 13px;line-height: 26px;}
.spinfo{background: rgba(0,0,0,0.35);}
}