@media (max-width: 1200px) {
  .h-w12 {
    display: none !important;
  }

  .w {
    width: 98%;
    padding: 0 1% 0 1%;
  }

  .banner-y {
    height: 400px;
    background: url(../tixing/ban.jpg) no-repeat center center;
  }

  .banbox {
    position: absolute;
    height: 421px;
    left: 60px;
    top: 70px;
    text-align: left;
    width: 470px;
  }

  .banbox b {

    color: #fff;

    font-weight: 100;

    padding: 2px 14px 0px 2px;

    border-radius: 52px;

    font-size: 3rem;

    line-height: 41px;

    display: inline-block;

    background: #ff8a00;

    text-indent: 20px;

  }

  .banbox h1 {

    font-size: 6rem;

    color: #ff8a00;

    line-height: 6rem;

    font-weight: 600;

    /* text-shadow: -1px 0 white, 0 1px white, 4px 0 white, 0 -1px white; */

    display: block;

    padding-right: 20px;

    margin-bottom: 0px;

  }

  .banbox p {

    font-size: 4rem;

    color: #303030;

    line-height: 50px;

  }

  .banbox font {

    color: #303030;

    font-size: 2rem;

    line-height: 45px;

    display: block;

  }

  .banbox section {

    overflow: hidden;

    margin-top: 20px;
  }

  .banbox section ul {}

  .banbox section ul li {

    display: block;

    float: left;

    width: 98px;

    height: 98px;

    border: 1px solid #585854;

    margin-right: 10px;

    border-radius: 27px;

    text-align: center;

    /* box-shadow: 0px 1px 7px 0px #ffffff; */
  }

  .banbox section ul li p {

    font-size: 35px;

    line-height: 50px;

    color: #040404;
  }

  /* t1 */
  .tit {
    overflow: hidden;

  }

  .t1 {

    width: 600px;

    margin: 0 auto;

  }

  .t1 h2 {

    display: block;

    float: left;

    font-size: 7rem;

    line-height: 80px;

    color: #ff8a00;

  }

  .t2 {

    display: block;

    float: left;

    border-bottom: 3px solid #ff8a00;

    line-height: 3rem;

    text-align: center;

    padding-top: 17px;

  }

  .t2 p {

    font-size: 2rem;

    color: #303030;

    text-transform: uppercase;

    line-height: 36px;

    padding-left: 20px;

    margin-bottom: 0px;

  }

  .t2 b {

    font-size: 3rem;

    color: #ff8a00;

    display: inline-block;

  }

  /* cs */
  .cs {
    overflow: hidden;
    text-align: center;
  }

  .cs img {

    max-width: 98%;

    margin-bottom: 20px;

  }

  /* problem */
  .problem {
    overflow: hidden;
    text-align: center;
  }

  .problem b {

    font-size: 60px;

    color: #ff8a00;

    line-height: 80px;
  }

  .problem-l {}

  .problem-l ul {}

  .problem-l ul li {

    display: block;

    float: left;

    width: 33%;

    position: relative;
  }

  .problem-l ul li img {}

  .problem-l ul li p {
    position: absolute;
    top: 217px;
    font-size: 3.5rem;
    line-height: 40px;
    color: #040404;
    left: 120px;
  }

  .problem-h {

    text-align: center;

    overflow: hidden;
  }

  .problem-h b {

    font-size: 3.5rem;

    color: #2e2e2e;

    font-weight: 500;

    line-height: 60px;

  }

  .problem-h font {

    display: block;

    font-size: 2rem;

    text-transform: uppercase;

    line-height: 46px;

  }

  .problem-h img {
    max-width: 100%;
  }

  /* tit2 */
  .tit2 {
    overflow: hidden;
    height: 250px;
  }

  .tit2-l {
    display: block;
    float: left;
    padding-left: 50px;
    padding-top: 50px;
  }

  .tit2-l b {
    font-size: 6rem;
    line-height: 100px;
    color: #1c1c1c;
  }

  .tit2-l b i {
    font-size: 7rem;
    color: #ff8a00;
    line-height: 70px;
  }

  .tit2-l p {
    font-size: 3rem;
    line-height: 40px;
    color: #535353;
  }

  .tit2-r {
    display: block;
    float: right;
    background: url(../tixing/y.jpg) no-repeat center center;
    height: 248px;
    width: 247px;
    padding-right: 200px;
  }

  .tit2-r b {
    font-size: 6rem;
    line-height: 80px;
    text-align: center;
    width: 213px;
    display: block;
    padding-top: 34px;
    color: #fff;
    padding-left: 27px;
  }

  /* reason */
  .reason {
    overflow: hidden;
    text-align: center;
  }

  .reason-t {}

  .reason-t b {
    font-size: 6rem;
    line-height: 70px;
  }

  .reason-t b i {
    font-size: 7rem;
    color: #ff8a00;
  }

  .reason-t p {
    font-size: 2rem;
    line-height: 36px;
    margin-top: 20px;
    padding: 10px 40px;
  }

  .reason-h {
    overflow: hidden;
  }

  .reason-h ul {}

  .reason-h ul li {
    background: url(../tixing/jx.jpg) no-repeat center center;
    display: block;
    float: left;
    width: 25%;
    height: 309px;
  }

  .reason-h ul li b {
    font-size: 3rem;
    line-height: 240px;
  }

  .reason-h ul li p {
    font-size: 2rem;
    color: #fff;
    line-height: 2px;
    margin-bottom: 20px;
  }

  .reason-h ul li span {
    font-size: 1rem;
    text-transform: uppercase;
    width: 200px;
    display: block;
    margin: 0 auto;
    line-height: 15px;
    color: #fff;
  }

  /* ys */
  .ys {
    overflow: hidden;
    text-align: center;
  }

  .ys-t {
    overflow: hidden;
    width: 540px;
    margin: 0 auto;
  }

  .ys-t b {
    display: block;
    float: left;
    font-size: 6rem;
    line-height: 130px;
  }

  .ys-t font {
    font-size: 11rem;
    line-height: 120px;
    display: block;
    float: left;
    padding-right: 20px;
    font-family: Impact;
    text-shadow: -1px 0 #585353, 0 1px #a39696, 4px 0 #cfcbcb, 0 -1px #cbc8c8;
  }

  .ys img {
    display: block;
    margin: 0 auto;
  }

  .ys span {
    font-size: 3rem;
    line-height: 60px;
    padding: 0px 20px;
    color: #1c1c1c;
  }

  /* xj */
  .xj {
    overflow: hidden;
    text-align: center;
  }

  .xj ul {}

  .xj ul li {
    display: block;
    float: left;
    width: 33%;
    margin-bottom: 30px;
  }

  .xj ul li p {
    padding-top: 154px;
    font-size: 3rem;
    line-height: 28px;
    color: #060606;
  }

  .xj ul li span {
    font-size: 1.5rem;
    line-height: 20px;
    color: #919191;
  }

  .l1 {
    background: url(../tixing/ys1.jpg) no-repeat center center;
    width: 221px;
    height: 225px;
  }

  .l2 {
    background: url(../tixing/ys2.jpg) no-repeat center center;
    width: 221px;
    height: 225px;
  }

  .l3 {
    background: url(../tixing/ys3.jpg) no-repeat center center;
    width: 221px;
    height: 225px;
  }

  .l4 {
    background: url(../tixing/ys4.jpg) no-repeat center center;
    width: 221px;
    height: 225px;
  }

  .l5 {
    background: url(../tixing/ys5.jpg) no-repeat center center;
    width: 221px;
    height: 225px;
  }

  .l6 {
    background: url(../tixing/ys6.jpg) no-repeat center center;
    width: 221px;
    height: 225px;
  }

  /* dw */
  .dw {
    overflow: hidden;
  }

  .dw1 {
    overflow: hidden;
  }

  .dw1-l {
    display: block;
    float: left;
    padding-left: 30px;
  }

  .dw1-l font {
    font-size: 6rem;
    line-height: 70px;
    color: #1c1c1c;
  }

  .dw1-l p {
    font-size: 7rem;
    line-height: 140px;
    font-weight: 600;
    color: #1c1c1c;
  }

  .dw1-l b {
    font-size: 3rem;
    font-weight: 500;
    background: #ff8a00;
    padding: 2px 12px;
    border-radius: 52px;
    color: #fff;
    line-height: 35px;
  }

  .dw1-l span {
    display: block;
    font-size: 2rem;
    color: #b2b2b2;
    line-height: 40px;
  }

  .dw1-r {
    display: block;
    float: right;
    padding-right: 80px;
    text-align: right;
  }

  .dw1-r img {
    padding-top: 40px;
  }

  .dw1-r p {
    font-size: 18px;
    line-height: 30px;
  }

  .dw2 {
    overflow: hidden;
    background: url(../tixing/dw.jpg) no-repeat center center;
    height: 777px;
    margin-bottom: 40px;
  }

  .dw2-h {

    bottom: 180px;

    left: 53px;
  }

  .dw2-h p {

    font-size: 3rem;

    line-height: 60px;

    color: #ff8a00;

  }

  .dw2-h span {

    display: block;

    font-size: 2rem;

    line-height: 32px;

    color: #0d0d0d;

  }

  .dw2-c {

    top: 250px;

    right: 56px;
  }

  .dw2-c p {

    font-size: 3rem;

    line-height: 60px;

    color: #ff8a00;

  }

  .dw2-c span {

    display: block;

    font-size: 2rem;

    line-height: 32px;

    color: #0d0d0d;

  }

  .dw2-f {

    bottom: 0px;

    right: 320px;
  }

  .dw2-f p {

    font-size: 3rem;

    line-height: 60px;

    color: #ff8a00;

  }

  .dw2-f span {

    display: block;

    font-size: 2rem;

    line-height: 32px;

    color: #0d0d0d;

  }

  /* advantage */
  .advantage {

    overflow: hidden;
  }

  .adv {}

  .t3 {
    overflow: hidden;
  }

  .t3 b {

    font-size: 48px;

    font-family: Impact;

    color: #ff8a00;

    line-height: 50px;

    letter-spacing: 4px;
    display: block;
  }

  .t3 p {

    font-size: 3rem;

    background: #ff8a00;

    display: block;

    line-height: 33px;

    color: #fff;

    float: left;

    width: 20%;

    padding: 8px 0 8px 0;

    text-indent: 20px;

  }

  .t3 font {

    font-size: 2.5rem;

    background: #979797;

    color: #fff;

    display: block;

    line-height: 34px;

    width: 80%;

    float: left;

    margin-top: 17px;

    padding: 5px 0 5px 0;

    text-indent: 20px;

  }

  /* tu */
  .tu {
    overflow: hidden;
  }

  .tu img {
    max-width: 49%;
  }

  .tu2 {

    text-align: center;
  }

  .tu2 img {
    max-width: 100%;
  }

  /* application */
  .application {
    overflow: hidden;
    text-align: center;
  }

  .app-tit {}

  .app-tit b {

    font-size: 4rem;

    line-height: 65px;

    border-bottom: 6px solid #ff8a00;

    display: inline-block;

  }

  .app-tit p {

    font-size: 3rem;

    line-height: 50px;

  }

  /* ly */
  .ly {

    overflow: hidden;

    text-align: center;

    margin-bottom: 60px;
  }

  .ly ul {}

  .ly ul li {

    display: block;

    float: left;

    width: 25%;
  }

  .ly ul li img {

    max-width: 100%;
  }

  .ly ul li p {

    font-size: 3rem;

    line-height: 40px;

  }

  .ly ul li font {

    font-size: 1.5rem;

    color: #6e6e6e;

    line-height: 26px;

  }

  /* about */
  .about {
    overflow: hidden;
    text-align: center;
    margin-bottom: 40px;
  }

  .about p {

    font-size: 2rem;

    line-height: 36px;

    color: #606060;

    padding: 0 70px 0 70px;

  }

  .about p font {

    color: #ef721f;
  }

  .about1 {}

  .about1 img {

    max-width: 98%;

  }

  .about2 {

    overflow: hidden;

    margin-bottom: 40px;

  }

  .about2 ul {}

  .about2 ul li {

    float: left;

    display: block;

    width: 49%;

    margin-right: 10px;

    padding-right: 0px;

  }

  .about2 ul li:nth-child(2n) {
    padding-right: 0px;
  }

  .about2 ul li img {
    max-width: 100%;
  }

  .about3 {
    overflow: hidden;
  }

  .about3 ul {}

  .about3 ul li {

    display: block;

    float: left;

    margin-right: 13px;

    width: 24%;

  }

  .about3 ul li:nth-child(4n) {
    margin-right: 0px;
  }

  .about3 ul li img {

    max-width: 100%;
  }
}

/*  */
@media (max-width: 767px) {
  .banner-y {
    height: 320px;
    background: url(../tixing/ban.jpg) no-repeat center center;
  }

  .banbox {
    position: absolute;
    height: 300px;
    left: 20px;
    top: 42px;
    text-align: left;
    width: 200px;
  }

  .banbox b {

    color: #fff;

    font-weight: 100;

    padding: 2px 0px 0px 2px;

    border-radius: 52px;

    font-size: 2rem;

    line-height: 3rem;

    display: inline-block;

    background: #ff8a00;

    text-indent: 5px;

  }

  .banbox h1 {

    font-size: 4rem;

    color: #ff8a00;

    line-height: 3rem;

    font-weight: 600;

    /* text-shadow: -1px 0 white, 0 1px white, 4px 0 white, 0 -1px white; */

    display: block;

    padding-right: 20px;

    margin-bottom: 0px;

  }

  .banbox p {

    font-size: 3rem;

    color: #303030;

    line-height: 3rem;

  }

  .banbox font {

    color: #303030;

    font-size: 2rem;

    line-height: 4rem;

    display: block;

  }

  .banbox section {

    overflow: hidden;

    margin-top: 20px;
  }

  .banbox section ul {}

  .banbox section ul li {

    display: block;

    float: left;

    width: 98px;

    height: 98px;

    border: 1px solid #585854;

    margin-right: 10px;

    border-radius: 27px;

    text-align: center;

    /* box-shadow: 0px 1px 7px 0px #ffffff; */
  }

  .banbox section ul li p {

    font-size: 35px;

    line-height: 50px;

    color: #040404;
  }

  /* t1 */
  .tit {
    overflow: hidden;
    margin-top: 0px;
  }

  .t1 {

    width: 600px;

    margin: 0 auto;

  }

  .t1 h2 {

    display: block;

    float: left;

    font-size: 4rem;

    line-height: 80px;

    color: #ff8a00;

  }

  .t2 {

    display: block;

    float: left;

    border-bottom: 3px solid #ff8a00;

    line-height: 1.5rem;

    text-align: center;

    padding-top: 5%;

  }

  .t2 p {

    font-size: 1rem;

    color: #303030;

    text-transform: uppercase;

    line-height: 3rem;

    padding-left: 20px;

    margin-bottom: 0px;

  }

  .t2 b {

    font-size: 2rem;

    color: #ff8a00;

    display: inline-block;

  }

  /* cs */
  .cs {
    overflow: hidden;
    text-align: center;
  }

  .cs img {

    max-width: 100%;

    margin-bottom: 20px;
  }

  /* problem */
  .problem {
    overflow: hidden;
    text-align: center;
    margin-top: 0px;
  }

  .problem b {

    font-size: 3rem;

    color: #ff8a00;

    line-height: 36px;

  }

  .problem-l {}

  .problem-l ul {}

  .problem-l ul li {

    display: block;

    float: left;

    width: 33%;

    position: relative;
  }

  .problem-l ul li img {
    max-width: 98%;
  }

  .problem-l ul li p {
    position: absolute;
    top: 37%;
    font-size: 2rem;
    line-height: 2rem;
    color: #040404;
    left: 17%;
  }

  .problem-h {

    text-align: center;

    overflow: hidden;
  }

  .problem-h b {

    font-size: 2rem;

    color: #2e2e2e;

    font-weight: 500;

    line-height: 2rem;

  }

  .problem-h font {

    display: block;

    font-size: 1rem;

    text-transform: uppercase;

    line-height: 1.5rem;

  }

  .problem-h img {
    max-width: 100%;
  }

  /* tit2 */
  .tit2 {
    overflow: hidden;
    height: 240px;
  }

  .tit2-l {
    display: block;
    float: left;
    padding-left: 0px;
    padding-top: 0px;
  }

  .tit2-l b {
    font-size: 3rem;
    line-height: 100px;
    color: #1c1c1c;
  }

  .tit2-l b i {
    font-size: 4rem;
    color: #ff8a00;
    line-height: 70px;
  }

  .tit2-l p {
    font-size: 30px;
    line-height: 40px;
    color: #535353;
  }

  .tit2-r {
    display: block;
    float: right;
    background: url(../tixing/y.jpg) no-repeat center center;
    height: 248px;
    width: 247px;
    padding-right: 200px;
  }

  .tit2-r b {
    font-size: 60px;
    line-height: 80px;
    text-align: center;
    width: 213px;
    display: block;
    padding-top: 34px;
    color: #fff;
    padding-left: 27px;
  }

  /* reason */
  .reason {
    overflow: hidden;
    text-align: center;
  }

  .reason-t {}

  .reason-t b {
    font-size: 3rem;
    line-height: 3rem;
  }

  .reason-t b i {
    font-size: 4rem;
    color: #ff8a00;
    line-height: 4rem;
  }

  .reason-t p {
    font-size: 2rem;
    line-height: 3rem;
    margin-top: 20px;
    padding: 1% 1%;
  }

  .reason-h {
    overflow: hidden;
  }

  .reason-h ul {}

  .reason-h ul li {
    background: url(../tixing/jx.jpg) no-repeat center center;
    display: block;
    float: left;
    width: 25%;
    height: 309px;
  }

  .reason-h ul li b {
    font-size: 36px;
    line-height: 240px;
  }

  .reason-h ul li p {
    font-size: 20px;
    color: #fff;
    line-height: 2px;
    margin-bottom: 20px;
  }

  .reason-h ul li span {
    font-size: 10px;
    text-transform: uppercase;
    width: 200px;
    display: block;
    margin: 0 auto;
    line-height: 15px;
    color: #fff;
  }

  /* ys */
  .ys {
    overflow: hidden;
    text-align: center;
  }

  .ys-t {
    overflow: hidden;
    width: 98%;
    margin: 0 auto;
    text-align: center;
  }

  .ys-t b {
    display: block;
    float: left;
    font-size: 3rem;
    line-height: 6rem;
  }

  .ys-t font {
    font-size: 6rem;
    line-height: 5rem;
    display: block;
    float: left;
    padding-right: 20px;
    font-family: Impact;
    text-shadow: -1px 0 #585353, 0 1px #a39696, 4px 0 #cfcbcb, 0 -1px #cbc8c8;
  }

  .ys img {
    display: block;
    margin: 0 auto;
  }

  .ys span {
    font-size: 2rem;
    line-height: 4rem;
    padding: 0px 20px;
    color: #1c1c1c;
  }

  /* xj */
  .xj {
    overflow: hidden;
    text-align: center;
  }

  .xj ul {}

  .xj ul li {
    display: block;
    float: left;
    width: 33%;
    margin-bottom: 30px;
  }

  .xj ul li p {
    padding-top: 120%;
    font-size: 2rem;
    line-height: 28px;
    color: #060606;
  }

  .xj ul li span {
    font-size: 1rem;
    line-height: 20px;
    color: #919191;
  }

  .l1 {
    background: url(../tixing/ys1.jpg) no-repeat center center;
    width: 221px;
    height: 225px;
  }

  .l2 {
    background: url(../tixing/ys2.jpg) no-repeat center center;
    width: 221px;
    height: 225px;
  }

  .l3 {
    background: url(../tixing/ys3.jpg) no-repeat center center;
    width: 221px;
    height: 225px;
  }

  .l4 {
    background: url(../tixing/ys4.jpg) no-repeat center center;
    width: 221px;
    height: 225px;
  }

  .l5 {
    background: url(../tixing/ys5.jpg) no-repeat center center;
    width: 221px;
    height: 225px;
  }

  .l6 {
    background: url(../tixing/ys6.jpg) no-repeat center center;
    width: 221px;
    height: 225px;
  }

  /* dw */
  .dw {
    overflow: hidden;
    margin-top: 0px;
  }

  .dw1 {
    overflow: hidden;
  }

  .dw1-l {
    display: block;
    float: left;
    padding-left: 1%;
    width: 70%;
  }

  .dw1-l font {
    font-size: 3rem;
    line-height: 4rem;
    color: #1c1c1c;
  }

  .dw1-l p {
    font-size: 3rem;
    line-height: 4rem;
    font-weight: 600;
    color: #1c1c1c;
  }

  .dw1-l b {
    font-size: 2rem;
    font-weight: 500;
    background: #ff8a00;
    padding: 2px 12px;
    border-radius: 52px;
    color: #fff;
    line-height: 3rem;
  }

  .dw1-l span {
    display: block;
    font-size: 1.5rem;
    color: #b2b2b2;
    line-height: 2rem;
  }

  .dw1-r {
    display: block;
    float: right;
    text-align: right;
    width: 30%;
    padding-right: 0px;
  }

  .dw1-r img {
    padding-top: 40px;
  }

  .dw1-r p {
    font-size: 1.2rem;
    line-height: 3rem;
  }

  .dw2 {
    overflow: hidden;
    background: url(../tixing/dw.jpg) no-repeat center center;
    height: 777px;
    margin-bottom: 40px;
  }

  .dw2-h {

    bottom: 180px;

    left: 53px;
  }

  .dw2-h p {

    font-size: 36px;

    line-height: 60px;

    color: #ff8a00;
  }

  .dw2-h span {

    display: block;

    font-size: 24px;

    line-height: 32px;

    color: #0d0d0d;
  }

  .dw2-c {

    top: 250px;

    right: 56px;
  }

  .dw2-c p {

    font-size: 36px;

    line-height: 60px;

    color: #ff8a00;
  }

  .dw2-c span {

    display: block;

    font-size: 24px;

    line-height: 32px;

    color: #0d0d0d;
  }

  .dw2-f {

    bottom: 0px;

    right: 320px;
  }

  .dw2-f p {

    font-size: 36px;

    line-height: 60px;

    color: #ff8a00;
  }

  .dw2-f span {

    display: block;

    font-size: 24px;

    line-height: 32px;

    color: #0d0d0d;
  }

  /* advantage */
  .advantage {

    overflow: hidden;

    margin-top: 0px;

  }

  .adv {}

  .t3 {
    overflow: hidden;
  }

  .t3 b {

    font-size: 4rem;

    font-family: Impact;

    color: #ff8a00;

    line-height: 50px;

    letter-spacing: 4px;

    display: block;

  }

  .t3 p {

    font-size: 2rem;

    background: #ff8a00;

    display: block;

    line-height: 3rem;

    color: #fff;

    float: left;

    width: 31%;

    padding: 2px 0 2px 0;

    text-indent: 8px;

  }

  .t3 font {

    font-size: 0.8rem;

    background: #979797;

    color: #fff;

    display: block;

    line-height: 1.2rem;

    width: 69%;

    float: left;

    margin-top: 17px;

    padding: 6px 0 10px 0;

    text-indent: 6px;

  }

  /* tu */
  .tu {
    overflow: hidden;
  }

  .tu img {
    max-width: 49%;
  }

  .tu2 {

    text-align: center;
  }

  .tu2 img {
    max-width: 100%;
  }

  /* application */
  .application {
    overflow: hidden;
    text-align: center;
  }

  .app-tit {}

  .app-tit b {

    font-size: 3rem;

    line-height: 4rem;

    border-bottom: 2px solid #ff8a00;

    display: inline-block;

  }

  .app-tit p {

    font-size: 2rem;

    line-height: 3rem;

  }

  /* ly */
  .ly {

    overflow: hidden;

    text-align: center;

    margin-bottom: 60px;
  }

  .ly ul {}

  .ly ul li {

    display: block;

    float: left;

    width: 25%;
  }

  .ly ul li img {

    max-width: 100%;
  }

  .ly ul li p {

    font-size: 2rem;

    line-height: 3rem;

  }

  .ly ul li font {

    font-size: 1rem;

    color: #6e6e6e;

    line-height: 1rem;

  }

  /* about */
  .about {
    overflow: hidden;
    text-align: center;
    margin-bottom: 40px;
    margin-top: 0px;
  }

  .about p {

    font-size: 1.5rem;

    line-height: 3rem;

    color: #606060;

    padding: 0px;

  }

  .about p font {

    color: #ef721f;
  }

  .about1 {}

  .about1 img {

    max-width: 100%;
  }

  .about2 {

    overflow: hidden;
    margin-bottom: 40px;
  }

  .about2 ul {}

  .about2 ul li {

    float: left;

    padding-right: 0px;

    display: block;

    width: 49%;

    margin-right: 3px;

  }

  .about2 ul li:nth-child(2n) {
    padding-right: 0px;
  }

  .about2 ul li img {
    max-width: 100%;
  }

  .about3 {
    overflow: hidden;
  }

  .about3 ul {}

  .about3 ul li {

    display: block;

    float: left;

    margin-right: 3px;

    width: 24%;

  }

  .about3 ul li:nth-child(4n) {
    margin-right: 0px;
  }

  .about3 ul li img {

    max-width: 100%;
  }
}