html, body {
  width: 100%;
  height: 100%; }

html, body, div, p, span {
  padding: 0;
  margin: 0; }

body {
  margin: 0 auto;
  font: 14px/1.5 "microsoft yahei", Arial, sans-serif;
  color: #333;
  letter-spacing: 1px; }

*, ::before, ::after {
  box-sizing: border-box; }

::-webkit-scrollbar {
  border-radius: 3px;
  background-color: #d1dbe3;
  width: 6px;
  height: 6px; }

.mt-30 {
  margin-top: 30px; }

::-webkit-scrollbar-thumb {
  background-color: #a6c8e3;
  box-shadow: 0px 1px 0px 0px rgba(136, 200, 250, 0.5);
  border-radius: 3px; }

.clearfix:after {
  content: "";
  height: 0;
  visibility: hidden;
  display: block;
  clear: both; }

.clearfix {
  zoom: 1; }

img {
  border: none;
  vertical-align: top; }

.text-bold {
  font-weight: bold; }

.mb-50 {
  margin-bottom: 50px; }

.mb-16 {
  margin-bottom: 16px; }

.main-box {
  width: 100%;
  height: 100%;
  padding: 0;
  margin: 0;
  background-color: #f4fbfe; }
  .main-box .img-bg {
    height: 100vh;
    float: left;
    position: relative; }
    .main-box .img-bg img {
      height: 100%; }
    .main-box .img-bg .tool-btn {
      position: absolute;
      background: url(//image.101.com/ppt/activity/icon-tool.png) 50px 16px no-repeat;
      background-color: rgba(255, 255, 255, 0.702);
      left: 50%;
      transform: translateX(-50%);
      bottom: 4%;
      height: 80px;
      width: 400px;
      border-radius: 40px;
      z-index: 2; }
    .main-box .img-bg .experience {
      right: 16px;
      top: 50%;
      transform: translateY(-50%);
      -webkit-transform: translateY(-50%); }

.experience {
  width: 113px;
  height: 49px;
  background: url(//image.101.com/ppt/activity/btn-experience.gif);
  border-radius: 24px;
  cursor: pointer;
  position: absolute; }

.main-cont {
  height: 100%;
  padding-right: 10px;
  padding-top: 15px;
  overflow: auto;
  padding-bottom: 8px; }
  .main-cont p {
    font-size: 15px; }
  .main-cont i {
    display: inline-block; }
  .main-cont .scroll-box {
    height: 100%;
    padding-left: 59px;
    overflow: auto;
    position: relative;
    padding-top: 27px;
    padding-right: 52px; }
  .main-cont .main-head {
    letter-spacing: 1px;
    text-indent: 32px;
    color: #33383e;
    line-height: 23px;
    margin-bottom: 12px; }
  .main-cont .icon-video {
    height: 12px;
    width: 16px;
    background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
    background-position-y: -31px;
    margin-right: 12px; }
  .main-cont .icon-pin {
    height: 15px;
    width: 15px;
    background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
    background-position-y: 0px;
    margin-right: 14px; }
  .main-cont .icon-teacher {
    height: 16px;
    width: 15px;
    background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
    background-position-y: -15px;
    margin-right: 13px; }
  .main-cont .icon-banner {
    height: 15px;
    width: 18px;
    background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
    background-position-y: -43px;
    margin-right: 13px; }
  .main-cont .list-box {
    margin-top: 20px; }
    .main-cont .list-box > div {
      float: left;
      width: 33.33%;
      height: 120px;
      text-align: center;
      position: relative;
      padding-top: 84px; }
      .main-cont .list-box > div::before {
        content: "";
        position: absolute;
        left: 50%;
        bottom: 46px;
        transform: translateX(-50%);
        -webkit-transform: translateX(-50%); }
    .main-cont .list-box .list1::before {
      height: 61px;
      width: 64px;
      background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
      background-position-y: -572px; }
    .main-cont .list-box .list2::before {
      height: 62px;
      width: 64px;
      background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
      background-position-y: -510px; }
    .main-cont .list-box .list3::before {
      height: 63px;
      width: 64px;
      background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
      background-position-y: -447px; }
    .main-cont .list-box .list4::before {
      height: 56px;
      width: 63px;
      background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
      background-position-y: -391px; }
    .main-cont .list-box .list5::before {
      height: 56px;
      width: 56px;
      background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
      background-position-y: -94px; }
    .main-cont .list-box .list6::before {
      height: 56px;
      width: 56px;
      background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
      background-position-y: -150px; }
    .main-cont .list-box .list7::before {
      height: 64px;
      width: 59px;
      background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
      background-position-y: -327px; }
    .main-cont .list-box .list8::before {
      height: 65px;
      width: 57px;
      background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
      background-position-y: -206px; }
    .main-cont .list-box .list9::before {
      height: 65px;
      width: 57px;
      background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
      background-position-y: -271px; }
  .main-cont .box-fun {
    margin-top: 30px;
    margin-bottom: 43px;
    z-index: 9; }
    .main-cont .box-fun.on {
      position: absolute;
      top: 0;
      background-color: #f4fbfe;
      margin: 0;
      z-index: 9;
      padding: 28px 0 24px 57px;
      display: none; }
  .main-cont .main-btn {
    width: 180px;
    height: 37px;
    float: left;
    background-image: -moz-linear-gradient(90deg, #2ba4ff 0%, #249cff 100%);
    background-image: -webkit-linear-gradient(90deg, #2ba4ff 0%, #249cff 100%);
    background-image: -ms-linear-gradient(90deg, #2ba4ff 0%, #249cff 100%);
    box-shadow: -5px 8.66px 20px 0px rgba(135, 152, 165, 0.05);
    border-radius: 18px;
    cursor: pointer; }
    .main-cont .main-btn:not(:first-child) {
      margin-left: calc((100% - 720px) / 3); }
    .main-cont .main-btn a {
      width: 100%;
      height: 100%;
      display: block;
      color: #ffffff;
      line-height: 37px;
      text-align: center;
      text-decoration: none;
      transition: all 0.2s; }
    .main-cont .main-btn:hover {
      background-image: -moz-linear-gradient(180deg, #2ba4ff 0%, #65cbff 30%, #249cff 100%);
      background-image: -webkit-linear-gradient(190deg, #2ba4ff 0%, #65cbff 30%, #249cff 100%);
      background-image: -ms-linear-gradient(180deg, #2ba4ff 0%, #65cbff 30, #249cff 100%); }
  .main-cont .icon-lesson {
    position: absolute;
    height: 66px;
    width: 149px;
    background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
    background-position-y: -633px; }
  .main-cont .head-title {
    height: 120px;
    background-color: #ffffff;
    box-shadow: -5px 9px 20px 0px rgba(135, 152, 165, 0.05);
    border-radius: 20px;
    text-align: center;
    color: #212428;
    letter-spacing: 1px;
    margin-bottom: 33px; }
    .main-cont .head-title p:first-child {
      font-size: 22px;
      line-height: 43px;
      padding-top: 16px; }
    .main-cont .head-title p:last-child {
      font-size: 26px;
      font-weight: bold; }
  .main-cont .head-img {
    position: absolute;
    width: 168px;
    height: 135px;
    background: url(//image.101.com/ppt/activity/head.png) no-repeat;
    top: 12px;
    left: 51px; }
  .main-cont .white-box {
    background-color: #ffffff;
    box-shadow: -5px 9px 20px 0px rgba(135, 152, 165, 0.05);
    border-radius: 20px;
    padding: 30px 65px;
    padding-bottom: 0px;
    color: #212428;
    line-height: 25px; }
    .main-cont .white-box .icon-lesson {
      left: 129px;
      top: 73px; }
  .main-cont .main-title {
    color: #212428;
    font-size: 20px;
    font-weight: bold;
    line-height: 45px;
    letter-spacing: 1px;
    border-bottom: solid 1px #bfbfbf;
    letter-spacing: 1px;
    margin-bottom: 25px; }
    .main-cont .main-title::before {
      content: "";
      display: inline-block;
      margin-right: 20px; }
    .main-cont .main-title.title-video::before {
      background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
      background-position-y: -78px;
      height: 16px;
      width: 21px; }
    .main-cont .main-title.title-pin::before {
      background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
      background-position-y: -58px;
      height: 20px;
      width: 20px;
      margin-bottom: -3px; }
    .main-cont .main-title.title-banner::before {
      background: url(//image.101.com/ppt/activity/icon.png) no-repeat;
      background-position-y: -700px;
      height: 19px;
      width: 23px;
      vertical-align: middle; }
  .main-cont .emphasize {
    color: #28a1ff; }
  .main-cont .video-box {
    background-color: #e6eff5;
    border-radius: 8px;
    position: relative; }
    .main-cont .video-box.on {
      padding: 8px; }
    .main-cont .video-box .video-play {
      width: 81px;
      height: 81px;
      background-color: rgba(40, 40, 40, 0.502);
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
      -webkit-transform: translate(-50%, -50%);
      border-radius: 50%;
      cursor: pointer; }
      .main-cont .video-box .video-play::before {
        content: "";
        position: absolute;
        left: 30px;
        top: 24px;
        width: 31px;
        height: 34px;
        background: url(//image.101.com/ppt/activity/icon-pause.png) no-repeat; }
    .main-cont .video-box video {
      height: 100%;
      width: 100%;
      object-fit: fill; }
  .main-cont .txt-b1 {
    color: #269eff; }
  .main-cont .recordLesson {
    position: relative;
    border-radius: 20px;
    background-color: #f4fbfe;
    box-shadow: inset 0px -3px 10px 0px rgba(42, 163, 255, 0.05);
    height: 202px; }
    .main-cont .recordLesson .experience {
      right: 114px;
      top: 75px; }
  .main-cont .box1 {
    position: relative;
    height: 107px;
    margin-top: 50px;
    margin-bottom: 63px; }
    .main-cont .box1 .recommend-img {
      width: 432px;
      height: 92px;
      display: inline-block;
      background: url(//image.101.com/ppt/activity/recommend-img.png) no-repeat; }
    .main-cont .box1 .box1-people {
      text-align: center;
      display: inline-block;
      font-size: 16px;
      color: #282828; }
  .main-cont .box1-bg {
    position: relative;
    padding-bottom: 324px;
    background-color: #fff;
    margin-bottom: 60px; }
    .main-cont .box1-bg::after {
      content: "";
      position: absolute;
      width: 557px;
      height: 250px;
      background: url(//image.101.com/ppt/activity/sweep-code.png) no-repeat;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%); }
  .main-cont .box2-bg {
    padding-bottom: 324px;
    position: relative;
    background-color: #fff;
    margin-bottom: 60px; }
    .main-cont .box2-bg::after {
      content: "";
      position: absolute;
      width: 593px;
      height: 223px;
      background: url(//image.101.com/ppt/activity/sweep-code1.png) no-repeat;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%); }
  .main-cont .box3-bg {
    padding-bottom: 485px;
    position: relative;
    background-color: #fff;
    margin-bottom: 60px; }
    .main-cont .box3-bg::after {
      content: "";
      position: absolute;
      width: 743px;
      height: 440px;
      background: url(//image.101.com/ppt/activity/list-bg.png) no-repeat;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%); }
  .main-cont .left-ask {
    height: 66px;
    background: url(//image.101.com/ppt/activity/left-ask.png) left top no-repeat;
    margin-top: 120px;
    margin-bottom: 33px; }
  .main-cont .right-answer {
    height: 66px;
    margin-bottom: 80px;
    background: url(//image.101.com/ppt/activity/right-answer.png) right top no-repeat; }
  .main-cont .blue-box {
    height: 231px;
    background-color: #e6eff5;
    box-shadow: -5px 9px 20px 0px rgba(106, 154, 191, 0.1), inset 0px -3px 10px 0px rgba(42, 163, 255, 0.05);
    border-radius: 20px;
    margin-top: 20px;
    overflow: hidden; }
    .main-cont .blue-box .blue-box-head {
      height: 38px;
      font-weight: bold;
      background-image: linear-gradient(0deg, #2ba4ff 0%, #249cff 100%);
      color: #ffffff;
      line-height: 38px;
      padding-left: 23px; }
    .main-cont .blue-box a {
      color: #212428;
      text-decoration: none; }
      .main-cont .blue-box a:hover {
        color: #28a1ff; }
  .main-cont .white-box-web {
    padding-bottom: 80px; }
    .main-cont .white-box-web .blue-box {
      min-height: 225px;
      height: auto; }
      .main-cont .white-box-web .blue-box .blue-box-head {
        margin-bottom: 28px;
        padding-left: 17px; }
      .main-cont .white-box-web .blue-box p {
        line-height: 40px;
        padding-left: 17px; }
        .main-cont .white-box-web .blue-box p a {
          word-break: break-all; }
  .main-cont .cour-resources {
    text-align: center;
    margin-bottom: 16px; }
  .main-cont .video-name {
    text-align: center;
    font-size: 12px;
    color: #333;
    margin-top: 16px;
    margin-bottom: 44px; }
  .main-cont .main-bottom {
    position: relative;
    height: 177px;
    width: 100%;
    max-width: 690px;
    margin: 0 auto;
    background-color: #ffffff;
    box-shadow: -5px 9px 20px 0px rgba(106, 154, 191, 0.1), inset 0px -3px 10px 0px rgba(42, 163, 255, 0.05);
    border-radius: 20px;
    margin-top: 338px; }
    .main-cont .main-bottom .icon-lesson {
      left: 313px;
      top: 60px; }
    .main-cont .main-bottom .main-bottom-fun {
      position: absolute;
      background: url(//image.101.com/ppt/activity/bottom-bg.png) no-repeat;
      height: 485px;
      width: 697px;
      top: -293px;
      left: -9px;
      padding: 30px 48px 0 252px;
      color: #ffffff;
      line-height: 28px;
      letter-spacing: 1px;
      margin-bottom: 100px; }
      .main-cont .main-bottom .main-bottom-fun p {
        font-size: 18px; }
        .main-cont .main-bottom .main-bottom-fun p:first-child {
          margin-bottom: 15px; }
    .main-cont .main-bottom .experience {
      right: 45px;
      top: 62px; }

@media screen and (min-width: 1640px) {
  .box2-bg .blue-box {
    height: 300px; }
  .box2-bg .list-box {
    margin-top: 50px; }
    .box2-bg .list-box > div {
      transform: scale(1.4, 1.4); }
 }

@media screen and (max-width: 1300px) {
  .main-cont {
    padding-right: 6px; }
    .main-cont p, .main-cont a {
      font-size: 12px; }
    .main-cont .mb-50 {
      margin-bottom: 20px; }
    .main-cont .scroll-box {
      padding-left: 41px;
      padding-right: 12px; }
    .main-cont .head-title {
      height: 83px; }
      .main-cont .head-title p {
        text-indent: 30px;
        font-size: 15px !important;
        line-height: normal !important; }
    .main-cont .head-img {
      width: 119px;
      height: 92px;
      top: 18px;
      left: 37px;
      background: url(//image.101.com/ppt/activity/head1.png) no-repeat; }
    .main-cont .main-head {
      line-height: 20px;
      margin-bottom: 5px; }
    .main-cont .main-btn {
      width: 151px;
      height: 31px; }
      .main-cont .main-btn:not(:first-child) {
        margin: unset; }
      .main-cont .main-btn a {
        line-height: 31px; }
      .main-cont .main-btn:nth-child(-n+2) {
        margin-bottom: 20px; }
      .main-cont .main-btn:nth-child(2n) {
        margin-left: calc(100% - 302px); }
      .main-cont .main-btn i {
        transform: scale3d(0.84, 0.84, 0.84);
        margin-bottom: -2px;
        margin-right: 4px; }
    .main-cont .box-fun {
      padding: 0 8%; }
    .main-cont .main-title {
      font-size: 15px;
      line-height: 32px; }
      .main-cont .main-title::before {
        transform: scale3d(0.84, 0.84, 0.84);
        margin-bottom: -3px;
        margin-right: 4px; }
    .main-cont .white-box {
      padding: 11px 40px 32px 44px;
      line-height: 20px; }
    .main-cont .box1-people {
      margin-left: -26px; }
      .main-cont .box1-people img {
        width: 42px;
        height: 42px; }
    .main-cont .box1 {
      margin-top: 25px;
      margin-bottom: 12px; }
      .main-cont .box1 .recommend-img {
        width: 298px;
        height: 63px;
        background: url(//image.101.com/ppt/activity/recommend-img1.png);
        margin-right: -28px; }
    .main-cont .recordLesson {
      height: 109px; }
      .main-cont .recordLesson .icon-lesson {
        width: 111px;
        height: 54px;
        background: url(//image.101.com/ppt/activity/tool-min.png);
        top: 50%;
        transform: translateY(-50%);
        left: 6%; }
      .main-cont .recordLesson .experience {
        width: 87px;
        height: 37px;
        background-size: 100% 100%;
        top: 50%;
        transform: translateY(-50%);
        right: 6%; }
    .main-cont .left-ask {
      margin-top: 60px;
      height: 41px;
      background-size: 367px 41px; }
    .main-cont .right-answer {
      height: 41px;
      background-size: 349px 41px;
      margin-bottom: 50px; }
    .main-cont .box1-bg {
      padding-bottom: 200px; }
    .main-cont .box1-bg::after {
      width: 353px;
      height: 158px;
      background: url(//image.101.com/ppt/activity/sweep-code-min.png); }
    .main-cont .box2-bg {
      padding-bottom: 186px; }
    .main-cont .box2-bg::after {
      width: 363px;
      height: 147px;
      background: url(//image.101.com/ppt/activity/sweep-code-min1.png); }
    .main-cont .box3-bg {
      padding-bottom: 300px; }
    .main-cont .box3-bg::after {
      width: 422px;
      height: 326px;
      background: url(//image.101.com/ppt/activity/sweep-code-min2.png); }
    .main-cont .blue-box-head {
      font-size: 12px;
      height: 25px !important;
      line-height: 25px !important; }
    .main-cont .list-box {
      margin-top: 0; }
      .main-cont .list-box div {
        padding-top: 70px; }
        .main-cont .list-box div::before {
          transform: scale3d(0.74, 0.74, 0.74);
          margin-left: -25%; }
    .main-cont .blue-box {
      height: 160px; }
    .main-cont .white-box-web .blue-box p {
      line-height: 20px;
      padding-right: 10px; }
    .main-cont .cour-resources img {
      transform: scale3d(0.8, 0.8, 0.8); }
    .main-cont .white-box-web .blue-box {
      min-height: 120px;
      padding-bottom: 20px; }
      .main-cont .white-box-web .blue-box p {
        line-height: 26px; }
      .main-cont .white-box-web .blue-box .blue-box-head {
        margin-bottom: 16px; }
    .main-cont .main-bottom {
      height: 100px;
      margin-top: 247px; }
      .main-cont .main-bottom .main-bottom-fun {
        width: 457px;
        height: 306px;
        background: url(//image.101.com/ppt/activity/bottom-bg1.png);
        top: -193px;
        padding: 30px 34px 0 147px;
        margin-bottom: 48px; }
        .main-cont .main-bottom .main-bottom-fun p {
          font-size: 12px;
          line-height: 20px; }
          .main-cont .main-bottom .main-bottom-fun p:first-child {
            margin-bottom: 0; }
      .main-cont .main-bottom .experience {
        width: 87px;
        height: 38px;
        background-size: 100% 100%;
        right: 6%;
        top: 50%;
        transform: translateY(-50%); }
      .main-cont .main-bottom .icon-lesson {
        width: 111px;
        height: 54px;
        background: url(//image.101.com/ppt/activity/tool-min.png);
        top: 50%;
        transform: translateY(-50%);
        left: 34%; }
    .main-cont .box-fun.on {
      padding: 20px 6%; }
 }