/*
BEM 设计模式

模块（没有前缀，多个单词用 - 连接）
元素（元素在模块之后，可以有多个层级，以 __ 连接）
修饰（某元素、或者某模块特别的状态，必须有一个状态名和状态值，使用 _ 链接）

*/

/* 容器盒子 */
.header{
	background-color: #f7f7f7;
}
.header__wrapper{
	width:1200px;
	height:80px;
	position: relative;
	margin: 0 auto;/* 整个盒子水平剧中 */
}


/* 导航条 */
.header__logo{
	width:150px;
	height: 38px;
	line-height: 38px;
	font-size: 20px;
	color: #f07111b;
	text-indent: 50px;
	background:url('../img/logo.png') no-repeat left center;
	background-size:38px 38px;
	top:50%;
	margin-top:-19px;
	position: absolute;
	left:20px;
}
.header__nav{
	position: absolute;
	right: 20px;
	height: 38px;
	top:50%;
	margin-top:-19px;
}
.header__nav-item{
	display: block;/* 只有块元素才有宽高 */
	color:#292f35;
	font-size: 14px;
	height: 38px;
	line-height: 38px;
	float: left;
	margin-left: 40px;
	position: relative;
}
.header__nav-item:hover{
	color: #f01400;
}
.header__nav-item_status_active{
	color: #f01400;
}
.header__nav-item_status_active::after{
	content:'';
	display: block;
	width:100%;
	height: 2px;
	position: absolute;
	left: 0;
	bottom: 0;
	background-color: #f01400;
	
}
.header__nav-item_custom_button{
	background-color: #000;
	color:#f4f4f5;
	text-align: center;
	width: 90px;
	border-radius: 5px;
}


/* 第一屏幕 */
.screen-1 {
	height: 800px;
	background-color: #e7e7e7;
	position: relative;
}
.screen-1__heading{
	font-weight: normal;
	font-size: 46px;
	color: #4d555d;
	text-align: center;
	padding-top:152px;	
}
.screen-1__heading b{
	color: #f01400;
	font-weight: normal;
	
}
.screen-1__phone{
	width:1375px;
	height: 305px;
	background: url(../img/screen-1-phone.png) center no-repeat;
	position: absolute;
	left:50%;
	margin-left: -687px;
	botton:180px;
	top:50%;
	z-index: 2;
}
.screen-1__shadow{
	width:1233px;
	height: 411px;
	background: url(../img/screen-1-shadow.png) center no-repeat;
	position: absolute;
	left:50%;
	margin-left: -616px;
	botton:30px;
	top:53%;
	z-index: 1;
	opacity: .8;
}


/* 第二屏 */
.screen-2{
	background-color: #fafafa;
	height: 800px;
	position: relative;
	overflow: hidden;
}

.screen-2__heading{
	font-weight: normal;
	font-size: 46px;
	line-height: 46px;
	color: #f01400;
	text-align: center;
	padding-top:96px;
}
.screen-2__subheading{
	font-weight: normal;
	font-size: 18px;
	color: #2c3137;
	text-align: center;
	padding-top:25px;
	line-height: 28px;
}
.screen-2__phone{
	width:928px;
	height: 873px;
	background: url(../img/screen-2-phone.png) center no-repeat;
	position: absolute;
	left:50%;
	margin-left: -464px;
	botton:-345px;
}
.screen-2__point{
	width:108px;
	height: 22px;
	line-height: 22px;
	padding-right: 112px;
	font-size: 22px;
	color:#4d555d;
	background: url(../img/icon-point-right.png) no-repeat center right;
	position: absolute;
}

.screen-2__point_custom_right{
	padding: 0 0 0 112px;
	background: url(../img/icon-point-left.png) no-repeat center left;
}
.screen-2__point_i_1{
	top:150px;
	left:-164px;
}
.screen-2__point_i_2{
	top:30px;
	right:130px;
}
.screen-2__point_i_3{
	top:330px;
	right:30px;
}


/* 第三屏 */
.screen-3{
	background-color: #fafafa;
	height: 800px;
	position: relative;
	overflow: hidden;
	background: url(../img/bg-screen-3.png) no-repeat center;
	background-size: cover;
}
.screen-3__wrap{
	width:1200px;
	height: auto;
	margin: 0 auto;
	position: relative;
}
.screen-3__heading{
	font-size: 46px;
	line-height: 46px;
	color: #fff;
	text-align: left;
	padding-top:96px;
}
.screen-3__subheading{
	font-size: 18px;
	color: #fff;
	text-align: left;
	padding-top:25px;
	line-height: 28px;
}
.screen-3__phone{
	width:729px;
	height: 900px;
	background: url(../img/screen-3-phone.png) center no-repeat;
	position: absolute;
	right:0;
	top:195px;
	botton:0;
}
.screen-3__features{
	position: absolute;
	top:395px;
	left:0;
	width:320px;
	height: 280px;
}
.screen-3__features__item{
	width: 138px;
	height: 118px;
	border: 1px solid #cb7173;
	margin:0 20px 20px 0;
	border-radius: 5px;
	float:left;
	color: #fff;
	text-align: center;
}
.screen-3__features__item__number{
	height: 30px;
	font-size: 30px;
	line-height: 30px;
	padding: 28px 0 8px;
}
.screen-3__features__item__desc{
	height: 14px;
	font-size: 14px;
	line-height: 14px;
}


/* 第四屏 */
.screen-4{
	background-color: #fff;
	height: 800px;
	position: relative;
}
.screen-4__wrap{
	width:1200px;
	height: auto;
	margin: 0 auto;
	position: relative;
}
.screen-4__heading{
	font-size: 46px;
	line-height: 46px;
	color: #f01400;
	text-align: center;
	padding-top:135px;
}
.screen-4__subheading{
	font-size: 18px;
	color: #464a4f;
	text-align: center;
	padding-top:29px;
	line-height: 29px;
}
.screnn-4__phone{
	width:729px;
	height: 900px;
	background: url(../img/screen-3-phone.png) center no-repeat;
	position: absolute;
	right:0;
	top:195px;
	botton:0;
}
.screen-4__type{
	width:1260px;
	height: 270px;
	position: absolute;
	top:300px;
	margin-left: 30px;
	
}
.screen-4__type__item{
	width:220px;
	margin-right: 90px;
	height: 270px;
	float: left;
	position: relative;
	text-align: center;
	background-size: cover;
}
.screen-4__type__item__color{
	width: 100%;
	height: 14px;
	line-height: 14px;
	font-size: 14px;
	color: #2c3238;
	position: absolute;
	bottom: -45px;
}
.screen-4__type__item_i_1{
	background: url('../img/phone-1.png') no-repeat left;
}
.screen-4__type__item_i_2{
	background: url('../img/phone-2.png') no-repeat left;
}
.screen-4__type__item_i_3{
	background: url('../img/phone-3.png') no-repeat left;
}
.screen-4__type__item_i_4{
	background: url('../img/phone-4.png') no-repeat left;
}

.screen-4__type__item__storage{
	width: 100%;
	height: 12px;
	line-height: 12px;
	font-size: 12px;
	color: #a4a9ae;
	position: absolute;
	bottom: -66px;
}

/* 第5屏 */
.screen-5{
	height: 800px;
	position: relative;
	overflow: hidden;
	background-color: #d9dde1;
}
.screen-5__bg{
	background:url(../img/bg-screen-5.png) no-repeat center;
	height: 433px;
	width: 1920;
	background-size: contain;
	position: absolute;
	bottom: 0;
	left:50%;
	margin-left: -960px;
}
.screen-5__heading{
	font-size: 46px;
	line-height: 46px;
	color: #f01400;
	text-align: center;
	padding-top:90px;
}
.screen-5__subheading{
	font-size: 18px;
	color: #2c3137;
	text-align: center;
	padding-top:25px;
	line-height: 28px;
}

/* 第6屏 */
.screen-buy{
	height: 80px;
	padding: 120px 0;
	position: relative;
	background: #2b333b url('../img/bg-screen-buy.png') center no-repeat;
	text-align: center;
}
.screen-buy__button{
	height: 80px;
	line-height: 80px;
	width: 240px;
	text-align: center;
	font-size: 24px;
	color: #fff;
	border-radius: 5px;
	background-color: #f01414;
	display: inline-block;
	transition: all .5s;
}
.screen-buy__button:hover{
	box-shadow: 0 0 10px rgba(0,0,0,.5);
}

/* footer */
.footer{
	height: 80px;
	line-height: 80px;
	text-align: center;
	color: #fff;
	background-color: #07111b;
	font-size: 12px;
}

/* outline 固定模块*/
/* 外壳 */
.outline{
	position: fixed;
	padding: 5px 10px;
	bottom:120px;
	right:0;
	z-index: 3;
	background-color: #fff;
	box-shadow: 0 4px 12px rgba(0,0,0,.5);
}
/* 控制内部 */
.outline_item{
	display: block;
	width: 55px;
	height: 25px;
	line-height: 25px;
	text-align: center;
	padding:5px 0;
	background-color: #fff;
	margin-top: 5px;
	border-top:1px solid #eee;
	color: #93999f;
}
.outline_item:first-child{
	border: none;
}
.outline_item_status_active{
	color:red;
}