.w1200{width: 1200px;height: auto;margin: 0 auto;position: relative;}

.slider{width: 100%;height: 300px;overflow: hidden;}
.slider .w1200{position: absolute;top: 0;left: 50%;transform: translateX(-50%);height: 100%;z-index: 3;}
.slider ul li{width: 100%;height: auto;position: relative; text-align: center; background-size: 100%;}
.slider ul li img{
    vertical-align: middle;max-width: 100%;
}
.slider ul li:after{content: "";display: block;position: absolute;width: 100%;height: 100%;top: 0;left: 0;z-index: 2;}
.slider ul li .slider-txt{position: absolute;top: 20%;left: 100px;z-index: 5;color: #FFFFFF;width: 700px; text-align: left;}
.slider ul li .slider-txt .title{font-size: 42px;letter-spacing: 2px;padding-bottom: 20px;}
.slider ul li .slider-txt .sub-title{font-size: 22px;color: #FFFFFF;padding-bottom: 70px;}
.slider ul li .slider-txt a.btn{display: inline-block;padding: 10px 30px;background: #f36c94;font-size: 20px;border-radius: 60px;transition: all .3s;cursor: pointer;}
.slider ul li .slider-txt a.btn:hover{transition: all .3s;padding: 12px 35px;}
.slider .arrow{position: absolute;width: 1200px;height: 58px;left: 50%;top: 50%;transform: translate(-50%,-50%);z-index: 3;}
.slider .swiper-button-next{background-image: url(../images/arrow-right.png);width: 30px;height: 58px;background-size:30px 58px;right: -30px;}
.slider .swiper-button-prev{background-image: url(../images/arrow-left.png);width: 30px;height: 58px;background-size:30px 58px;left: -30px;}