.pos-rlt {
  position: relative;
}
.aling-r {
  text-align: right;
}
.pad-r-20 {
  padding-right: 20px;
}
.pad-r-0 {
  padding-right: 0px;
}
.pad-0 {
  padding: 0px;
}
.m-t-15 {
  margin-top: 15px;
}
.m-t-20 {
  margin-top: 20px;
}
.m-t-40 {
  margin-top: 40px;
}
.m-b-20 {
  margin-bottom: 20px;
}
input:-webkit-autofill {
  background-color: #ffffff;
}
.fl {
  float: left;
}
.fr {
  float: right;
}
.of-h {
  overflow: hidden;
}
.f14-88 {
  font-family: Microsoft YaHei;
  font-size: 14px;
  color: #888;
  text-align: center;
}
.f20-ff {
  font-family: Microsoft YaHei;
  font-size: 20px;
  color: #fff;
  text-align: center;
}
a:link {
  text-decoration: none;
}
a:visited {
  text-decoration: none;
}
a:hover {
  text-decoration: none;
}
a:active {
  text-decoration: none;
}
body {
  background: #fff;
  overflow-y: auto;
  /*overflow-x: hidden;*/
  font-family: Microsoft YaHei, arial, "瀹嬩綋", tahoma;
  font-size: 18px;
  color: #262626;
}
header,
footer,
.main,
.buy-now-bar {
  width: 100%;
  min-width: 1170px;
}
/*header*/
header {
  background: #262626;
  height: 44px;
  line-height: 44px;
  font-family: Microsoft YaHei;
  font-size: 14px;
  color: #fff;
  text-align: center;
}
.header {
  background: #262626;
  height: 44px;
  line-height: 44px;
  font-family: Microsoft YaHei;
  font-size: 14px;
  color: #fff;
  text-align: center;
}
.logo {
  text-align: left;
  padding: 0;
  min-width: 162px;
}
.logo img {
  height: 20px;
  width: 162px;
  max-width: 440px;
}
nav {
  height: 44px;
}
.menu {
  text-align: center;
  margin: 0;
  position: relative;
  color: #ccc;
  min-width: 750px;
}
.menu span {
  font-size: 12px;
}
.menu li {
  display: inline-block;
  list-style: none;
  padding: 0 10px;
}
.menu li a {
  display: block;
  font-family: Microsoft YaHei;
  font-size: 14px;
  color: #ccc;
  text-align: center;
  font-family: "arial", "Microsoft YaHei", "STXihei", "sans-serif", "Menlo";
  cursor: poniter;
}
.menu li a:hover {
  text-decoration: none;
}
.menu li span {
  display: block;
  font-family: Microsoft YaHei;
  font-size: 14px;
  color: #ccc;
  text-align: center;
  cursor: poniter;
}
.menu li span i {
  display: inline-block;
  width: 0;
  height: 0;
  border: none;
  border-top: 5px solid #ccc;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: none;
  margin-left: 5px;
  margin-bottom: 2px;
}
.dropDown {
  cursor: pointer;
}
.subMenu {
  display: none;
  background: #262626;
  border-radius: 0px 0px 5px 5px;
  position: absolute;
  z-index: 10;
  margin-left: -16px;
  min-width: 111px;
}
.subMenu ul {
  padding: 0px 0px 5px;
  marign: 0 5px;
}
.subMenu li {
  list-style: none;
  display: block;
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  height: 30px;
  line-height: 30px;
}
.subMenu li a {
  display: block;
  text-decoration: none;
  color: #ccc;
  cursor: pointer;
}
.subMenu li:last-child {
  border-bottom: none;
}
.subMenu li:hover {
  background: #3b3b3b;
}
.subMenu li:hover a {
  color: #fff;
}
/*璇█鏍忚彍鍗�/
.lang-box {
  padding: 0;
  text-align: right;
  position: relative;
}
.lang {
  background: #2872a0;
  border-radius: 3px;
  /*width: 88px;*/
  line-height: 24px;
  padding: 2px 8px;
  margin-top: 9px;
  float: right;
}
.lang i {
  display: inline-block;
  width: 0;
  height: 0;
  border: none;
  border-top: 5px solid #fff;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: none;
  margin-left: 5px;
  margin-bottom: 2px;
}
.lang:hover {
  cursor: pointer;
}
.lang-menu {
  border-radius: 3px;
  position: absolute;
  z-index: 10;
  right: 0;
  top: 40px;
  background-color: #fff;
  -webkit-box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  border: none;
  padding: 5px;
  width: 88px;
  display: none;
}
.lang-menu ul {
  padding: 0;
  margin: 0;
}
.lang-menu ul li {
  list-style: none;
  color: #333;
  border-bottom: #ccc 1px solid;
  line-height: 25px;
  text-align: center;
  float: none;
}
.lang-menu ul li:last-child {
  border-bottom: none;
}
.lang-menu ul li:hover {
  cursor: pointer;
}
.head-frg {
  list-style: none;
  padding: 0;
  margin: 0;
}
.head-frg li {
  list-style: none;
  padding: 0;
  float: right;
}
.head-frg li a.icon-shop {
  font-family: Microsoft YaHei;
  font-size: 14px;
  color: #fff;
  text-align: center;
  background: url("../../images/icons/icon-shop.png") no-repeat left center;
  padding-left: 30px;
}
.head-frg li a.icon-user {
  display: block;
  margin: 0 10px;
}
.head-frg li a.icon-user img {
  width: 25px;
  height: 25px;
  border-radius: 50%;
  margin: 0 0 0 2px;
}
.head-frg li a.icon-user i {
  display: inline-block;
  width: 0;
  height: 0;
  border: none;
  border-top: 5px solid #fff;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: none;
}
.head-frg .user-box {
  position: relative;
}
.head-frg .login-dropdown {
  border-radius: 3px;
  position: absolute;
  z-index: 10;
  right: 0;
  top: 40px;
  background: #262626;
  -webkit-box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  border: none;
  padding: 5px;
  min-width: 88px;
  display: none;
}
.head-frg .login-dropdown li {
  list-style: none;
  color: #333;
  border-bottom: #ccc 1px solid;
  line-height: 25px;
  text-align: center;
  float: none;
}
.head-frg .login-dropdown li:last-child {
  border-bottom: none;
}
.head-frg .login-dropdown li a {
  color: #ccc;
}
/*footer*/
.footer {
  background: #2a2b37;
  width: 100%;
  font-family: Microsoft YaHei;
  font-size: 14px;
  color: #aaa;
  text-align: left;
}
.footer dl {
  padding: 0;
  margin: 0;
}
.footer dt {
  height: 20px;
  line-height: 20px;
  margin: 20px 0px;
  font-family: STHeitiSC-Light;
  font-size: 16px;
  color: #fff;
  text-align: left;
}
.footer dd {
  margin: 0;
  line-height: 30px;
}
.footer dd a {
  font-family: Microsoft YaHei;
  font-size: 14px;
  color: #aaa;
  text-align: left;
  cursor: pointer;
  text-decoration: none;
}
.footer dd a:hover {
  text-decoration: none;
  color: #aaa;
}
.ft-skin {
  padding-bottom: 30px;
  background: url("../../images/icons/bg-footer2.png") no-repeat center bottom;
}
.ft-r-1 {
  /*margin:15px 0 32px 0;*/
  margin: 15px 0 7px 0;
}
.ft-r-1 span {
  display: block;
  text-align: right;
  height: 26px;
  line-height: 26px;
}
.ft-r-2 {
  font-family: Microsoft YaHei, arial, "瀹嬩綋", tahoma;
  font-size: 14px;
  color: #fff;
  text-align: left;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 5px;
}
.ft-r-2 span {
  display: inline-block;
}
.ft-r-2 a {
  color: rgba(255, 255, 255, 0.8);
  display: inline-block;
  text-decoration: none;
}
.ft-r-2 a i {
  display: inline-block;
  width: 14px;
  height: 16px;
  margin: 0 5px -2px 5px;
  background: url("../../images/icons/qq.png") no-repeat left center;
  background-size: cover;
}
.w195 {
  width: 195px;
  float: right;
  text-align: left;
  margin-right: 20px;
}
.w250 {
  width: 250px;
  float: right;
  text-align: right;
  margin-right: 20px;
}
.w250 .ft-r-2 {
  text-align: right;
}
.wechat-dd {
  position: relative;
}
.wechat-box,
.wechat-service-box {
  width: 243px;
  height: 249px;
  overflow: hidden;
  padding: 12px 15px 25px 14px;
  background: url("../../images/icons/qrcode-popup.png") no-repeat;
  background-position: center;
  background-size: 100% 100%;
  position: absolute;
  display: none;
  bottom: 20px;
  left: -107px;
}
.wechat-box img,
.wechat-service-box img {
  width: 215px;
  height: 215px;
}
.wechat-service-box {
  left: 135px;
}
/*center*/
.center {
  min-height: 467px;
  width: 100%;
  padding-bottom: 40px;
}
/*banner*/
.banner.flexslider {
  position: static;
}
.banner .flex-control-nav {
  display: none;
  bottom: 15px;
}
.banner img {
  width: 100%;
}
.banner ul {
  margin: 0;
  padding: 0;
}
.banner-box {
  background: #f3f4f9;
  margin: 16px -15px 20px -15px;
}
.banner-img {
  overflow: hidden;
  padding: 0;
}
.banner-img img {
  width: 100%;
  height: 100%;
}
.bg-ff {
  background-color: #fff;
}
.bg-f2 {
  background-color: #f2f2f2;
}
/*layout*/
.s9-container,
.s9-col-6 {
  padding: none;
  margin: 0px;
}
.s9-container {
  width: 100%;
}
.s9-row {
  width: 1140px;
  height: 626px;
  margin: 0 auto;
  overflow: hidden;
}
.s9-row:before,
.s9-row:after {
  content: " ";
  display: table;
}
.s9-row:after {
  clear: both;
}
.w595 {
  width: 595px;
}
.w545 {
  width: 545px;
}
.s9-row-1 {
  width: 1140px;
  height: auto;
  margin: 0 auto;
}
.s9-row-1:before,
.s9-row-1:after {
  content: " ";
  display: table;
}
.s9-row-1:after {
  clear: both;
}
.s9-row-h-auto {
  width: 1140px;
  height: auto;
  margin: 0 auto;
}
.s9-row-h-auto:before,
.s9-row-h-auto:after {
  content: " ";
  display: table;
}
.s9-row-h-auto:after {
  clear: both;
}
.s9-gallary-row {
  width: 100%;
  overflow: hidden;
  margin: 0 auto;
  text-algin: center;
}
.s9-gallary-row img {
  width: 1440;
  height: 626px;
  display: block;
  margin: 0 auto;
}
.pad-l-50 {
  padding-left: 50px;
}
.p-b-0 {
  padding-bottom: 0;
}
.main .p-b-0 {
  padding-bottom: 0;
}
.w840 {
  max-width: 805px;
}
.w300 {
  width: 335px;
  height: auto;
}
.w482 {
  width: 480px;
  height: auto;
}
.w660 {
  width: 660px;
}
.w553 {
  width: 553px;
  height: auto;
}
.w587 {
  width: 587px;
}
.w534 {
  width: 534px;
}
.w606 {
  width: 606px;
}
.w630 {
  width: 600px;
}
.w417 {
  width: 417px;
}
.fl {
  float: left;
}
.fr {
  float: right;
}
.s9-col-c6 {
  width: 50%;
  float: left;
}
.s9-col-c6 {
  width: 60%;
  float: left;
}
.s9-wrd-dpt-l .s9-wrd-dpt-con {
  padding: 75px 20px 75px 0px;
}
.s9-wrd-dpt-l .p-t-128 {
  padding-top: 128px;
}
.s9-wrd-dpt-r .s9-wrd-dpt-con {
  padding: 75px 0px 75px 20px;
}
.w840 .s9-wrd-dpt-con {
  padding: 158px 20px 75px 0px;
}
.w300 img {
  margin-top: 60px;
}
.s9-wrd-dpt-l,
.s9-wrd-dpt-r {
  height: 626px;
}
.s9-wrd-dpt-l h2,
.s9-wrd-dpt-r h2 {
  font-family: Arial;
  font-size: 48px;
  color: #000;
  text-align: left;
  margin: 0;
  line-height: 50px;
}
.s9-wrd-dpt-l h3,
.s9-wrd-dpt-r h3 {
  font-family: Arial;
  font-size: 30px;
  color: #262626;
  text-align: left;
  font-weight: 200;
  line-height: 41px;
  margin: 10px 0 20px 0;
}
.s9-wrd-dpt-l p,
.s9-wrd-dpt-r p {
  font-family: Arial;
  font-size: 22px;
  color: #888;
  text-align: left;
  margin: 10px 0 0 0;
}
.s9-img-con {
  padding: 75px 0 0;
}
.p-t-128 {
  padding: 128px 0 0;
}
.sec-3 {
  background-image: url("http://image.bitmain.com/S9/img-board@2x.png");
  background-repeat: no-repeat;
  background-position: 100% 0;
  height: 100%;
  position: absolute;
  right: 0;
  background-size: 100% 100%;
}
.overview-bg,
.spec-bg,
.spec-bg2,
.spec-bg2-s7,
.gallary-bg,
.spec-bg-s7,
.overview-bg-s7-3,
.gallary-bg-s7 {
  background-repeat: no-repeat;
}
.overview-bg {
  background-image: url("http://image.bitmain.com/S9/overview-bg-1.png");
  background-position: center center;
  background-size: 100% 100%;
}
.overview-bg-s7 {
  background-image: url("http://image.bitmain.com/S7/overview-bg-1.png");
  background-position: left center;
  background-repeat: no-repeat;
}
.spec-bg {
  background-image: url("http://image.bitmain.com/S9/overview-bg-board.png");
  background-position: center center;
  background-size: cover;
}
.spec-bg-s7 {
  background-image: url("http://image.bitmain.com/S7/overview-bg-board.png");
  background-position: center center;
  background-size: cover;
}
.overview-bg-s7-3 {
  background-image: url("http://image.bitmain.com/S7/overview-bg-fans.png");
  background-position: -15px center;
}
.spec-bg2 {
  background-image: url("http://image.bitmain.com/S9/bg-test.jpg");
  background-position: center center;
  background-size: cover;
}
.spec-bg2-s7 {
  background-image: url("http://image.bitmain.com/S7/specifications-bg-1.png");
  background-position: center center;
  background-size: cover;
}
.gallary-bg {
  background-image: url("http://image.bitmain.com/S9/S9gallery-bg1.png");
  background-position: center center;
}
.gallary-bg-s7 {
  background-image: url("http://image.bitmain.com/S7/gallery-bg-1.png");
  background-position: center center;
}
.s9-imgs {
  position: relative;
  min-height: 626px;
}
.s9-imgs .img1,
.s9-imgs .img2,
.s9-imgs .img3 {
  position: absolute;
}
.s9-imgs .img1 {
  bottom: 0px;
  right: 50px;
  max-width: 602px;
  max-height: 468px;
  z-index: 3;
}
.s9-imgs .img2 {
  z-index: 2;
  max-width: 588px;
  max-height: 289px;
  top: 135px;
  right: 20px;
}
.s9-imgs .img3 {
  z-index: 1;
  max-width: 584px;
  max-height: 260px;
  right: -10px;
  top: 70px;
}
.s7-imgs .img2 {
  top: 105px;
  right: 10px;
}
.s7-imgs .img1 {
  right: 30px;
}
.s9-wrd-dpt-r .p-t-30 {
  padding-top: 30px;
}
.buy-now-bar {
  width: 100%;
  height: 58px;
  line-height: 50px;
  background: rgba(38, 38, 38, 0.5);
  text-align: right;
  position: absolute;
  top: 44px;
  z-index: 5;
}
.buy-now-bar .buy-now-bar-con {
  width: 1140px;
  margin: 0 auto;
}
.buy-now-bar a {
  font-family: Arial;
  font-size: 18px;
  color: #ccc;
  text-align: left;
  text-decoration: none;
  display: inline-block;
  margin-right: 70px;
}
.buy-now-bar a:hover {
  color: #fff;
}
.buy-now-bar a.current {
  color: #fff;
}
.buy-now-bar .btn-buy-now {
  background: #d0021b;
  height: 40px;
  line-height: 40px;
  margin: 9px 0 0 0;
  font-family: Arial;
  font-size: 18px;
  color: #fff;
  text-align: center;
  display: inline-block;
  padding: 0px 10px 11px;
}
.buy-now-bar .btn-buy-now:focus {
  outline: none;
}
.buy-now-bar.BuyNowBarFixed {
  position: fixed;
  top: 0px;
}
/*specifications*/
.s9-spc-h1 {
  height: 128px;
  background: url("../../images/icons/img-logo-antminer.png") no-repeat left center;
  line-height: 205px;
  padding-left: 359px;
  margin: 51px 0 9px;
  font-family: Arial;
  font-size: 71.51px;
  color: #262626;
  text-align: left;
  letter-spacing: 0px;
}
h2.s9-spc-h2 {
  font-family: Arial;
  font-size: 54px;
  color: #262626;
  text-align: left;
  letter-spacing: 0px;
  font-weight: 200;
  line-height: 60px;
  margin-bottom: 25px;
}
p.s9-spc-des {
  font-family: Arial;
  font-size: 26px;
  color: #333;
  text-align: right;
  letter-spacing: 0px;
  display: table-row;
}
.goLink {
  display: table-row;
  font-family: Arial;
  font-size: 26px;
  color: #d0021b;
  text-align: right;
  padding-right: 31px;
}
.goLink i {
  display: inline-block;
  background: url("../../images/icons/icon-right.png") no-repeat;
  width: 14px;
  height: 14px;
  margin-left: 10px;
  /* float: right; */
  margin-top: 10px;
  background-size: contain;
}
.goLink:hover {
  color: #d0021b;
}
.s9-spc-dpt-con,
.R4-spc-dpt-con {
  padding: 30px 0 0 0;
}
.s9-spc-dpt-con h2,
.R4-spc-dpt-con h2 {
  font-family: Arial;
  font-size: 36px;
  color: #262626;
  text-align: left;
  margin: 0 0 20px 0;
}
.s9-spc-dpt-con p,
.R4-spc-dpt-con p {
  font-family: Arial;
  font-size: 24px;
  color: #262626;
  text-align: left;
  margin: 0 0 5px 0;
  padding: 0;
  line-height: 34px;
}
.s9-spc-dpt-con p span:first-child,
.R4-spc-dpt-con p span:first-child {
  font-family: Arial;
  font-size: 24px;
  color: #888;
  text-align: left;
}
.s9-spc-dpt-con p span.f-22-888,
.R4-spc-dpt-con p span.f-22-888 {
  font-family: Arial;
  font-size: 22px;
  color: #888;
  text-align: left;
}
.s9-spc-dpt-con ul,
.R4-spc-dpt-con ul {
  margin: 0;
  padding-left: 25px;
}
.s9-spc-dpt-con ul li,
.R4-spc-dpt-con ul li {
  font-family: Arial;
  font-size: 24px;
  color: #262626;
  text-align: left;
  margin: 0 0 5px 0;
  padding: 0;
  line-height: 28px;
}
.s9-spc-dpt-con ul li span:first-child,
.R4-spc-dpt-con ul li span:first-child {
  font-family: Arial;
  font-size: 24px;
  color: #888;
  text-align: left;
}
.s9-spc-dpt-con ul li span.f-22-888,
.R4-spc-dpt-con ul li span.f-22-888 {
  font-family: Arial;
  font-size: 22px;
  color: #888;
  text-align: left;
}
.R4-spc-dpt-con {
  padding: 0px 0 0 0;
}
.R4-spc-dpt-con ul {
  margin: 0;
  padding-left: 0px;
}
.R4-spc-dpt-con ul li {
  font-family: Arial;
  font-size: 20px;
  color: #262626;
  text-align: left;
  margin: 0 0 0 0;
  padding: 25px 20px;
  list-style: none;
  color: #231815;
}
.R4-spc-dpt-con ul li:nth-child(2n) {
  background: #f2f2f2;
}
.R4-spc-dpt-con ul li span {
  display: table-cell;
}
.R4-spc-dpt-con ul li span:first-child {
  font-family: Arial;
  font-size: 20px;
  color: #888;
  text-align: left;
  color: #231815;
  font-weight: bold;
  width: 256px;
  padding-right: 35px;
}
.R4-spc-dpt-con ul li span.f-22-888 {
  font-family: Arial;
  font-size: 22px;
  color: #888;
  text-align: left;
}
.R4-spc-row {
  min-height: 626px;
  height: 100%;
}
.p-t-129 {
  padding-top: 129px;
}
.s9-warranty {
  padding-bottom: 0px;
}
.s9-warranty h2 {
  font-family: Arial;
  font-size: 22px;
  color: #888;
  text-align: left;
  margin: 0px 0 0px 0;
  padding: 0;
}
.s9-warranty p,
.s9-warranty dl {
  font-family: Arial;
  font-size: 14px;
  color: #999;
  text-align: left;
  padding: 0;
  margin: 0 0 5px;
  line-height: 18px;
}
.s9-warranty p dd,
.s9-warranty dl dd {
  margin-left: 20px;
}
.p-b-90 {
  padding-bottom: 90px;
}
.batch-ul-1 {
  padding: 0;
  margin: 0;
  overflow: hidden;
  width: 600px;
}
.batch-ul-1 li {
  list-style: none;
  height: 35px;
  line-height: 35px;
  width: 290px;
  overflow: hidden;
  display: block;
  float: left;
  margin: 0 10px 10px 0;
  text-align: left;
  color: #4a4a4a;
  font-size: 14px;
}
.batch-ul-1 li a {
  color: #696969;
}
.batch-ul-1 li span {
  display: inline-block;
}
.batch-ul-1 li span.batch-arrow {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #cbccce;
  color: #fff;
  font-size: 16px;
  line-height: 16px;
}
.batch-ul-1 li span.batch-arrow i {
  display: inline-block;
  width: 0;
  height: 0;
  margin: -4px 0 0 7px;
  vertical-align: middle;
  border-left: 4px dashed;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
}
.batch-ul-1 li:hover span {
  color: #f70505;
}
.batch-ul-1 li:hover span.batch-arrow {
  color: #fff;
  background: #f70505;
}
.anchor-content {
  max-width: 100%;
  display: block;
  width: 45px;
  height: 45px;
  line-height: 45px;
  position: absolute;
  top: 647.5px;
  left: 50%;
  margin-left: -22.5px;
  z-index: 4;
  padding: 0px;
  border: 1px solid transparent;
  border-radius: 100px;
  background-color: #f2f2f2;
  -webkit-transition: all 100ms ease;
  transition: all 100ms ease;
  color: #fff;
  -moz-animation: bling 2s infinite ease-in-out;
  -webkit-animation: bling 2s infinite ease-in-out;
  animation: bling 2s infinite ease-in-out;
}
.anchor-content:link {
  border: 1px solid transparent;
}
.anchor-content:active {
  border: 1px solid transparent;
}
.anchor-content:hover {
  border: 1px solid #fff;
}
.anchor-content:visited {
  border: 1px solid transparent;
}
.anchor-content .btn-scroll-down {
  display: block;
  width: 22px;
  height: 18px;
  margin: 14px auto 0px;
  text-align: center;
  background: url("../../images/icons/a-d.png") no-repeat center center;
  background-size: cover;
}
keyframes bling 0% {
  border: 1px solid transeparent;
}
keyframes bling 50% {
  box-shadow: inset 0px 0px 15px #e2e2e2, 0px -1px 1px rgba(255, 255, 255, 0.2);
}
keyframes bling 100% {
  border: 1px solid transeparent;
}
@-webkit-keyframes bling {
  0% {
    border: 1px solid transeparent;
  }
  50% {
    box-shadow: inset 0px 0px 10px #e2e2e2, 0px -1px 1px rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.2);
  }
  100% {
    border: 1px solid transeparent;
  }
}
@media (max-width: 768px) {
  .main {
    width: 750px;
    overflow: auto;
  }
  header,
  .footer {
    width: 750px;
  }
}
header,
footer {
  display: block;
}