/*
* Prefixed by https://autoprefixer.github.io
* PostCSS: v7.0.29,
* Autoprefixer: v9.7.6
* Browsers: > 0.05%,last 11 versions,IE >=8,iOS >= 7,Android >= 4
*/

body {
  background-color: #eee;
}

.header .logo>a {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: horizontal;
  -webkit-box-direction: normal;
  -webkit-flex-direction: row;
      -ms-flex-direction: row;
          flex-direction: row;
  -webkit-box-align: center;
  -webkit-align-items: center;
      -ms-flex-align: center;
          align-items: center;
}

.header .logo>a>img {
  width: 36px;
}

.header .logo>a>span {
  margin-left: 0.3em;
  font-size: 1.8em;
  letter-spacing: .1em;
  color: #fff;
}

.hero-area.breadcrumb-area {
  padding-top: 160px;
  padding-bottom: 65px;
}

.hero-area-content h1 {
  font-size: 44px;
}

.hero-area-content a {
  -webkit-transition: none;
  -o-transition: none;
  transition: none;
}

.breadcrumb-area ul li a {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
}

.breadcrumb-area ul li a:hover {
  color: inherit;
}

.breadcrumb-area ul li a::before {
  content: "|";
}

.books {
  margin-top: 50px;
}

.courses {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: horizontal;
  -webkit-box-direction: normal;
  -webkit-flex-direction: row;
      -ms-flex-direction: row;
          flex-direction: row;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
      -ms-flex-align: center;
          align-items: center;
  margin-bottom: 40px;
}

.courses.row4 {
  margin-bottom: 50px;
}

/* 以下为正常的样式 */

.grade {
  width: 235px;
  height: 279px;
  margin: 0 20px;
  -webkit-box-shadow: 0 0 10px rgba(0, 0, 0, 0.7);
          box-shadow: 0 0 10px rgba(0, 0, 0, 0.7);
  color: #fff;
}

.grade.trial {
  cursor: pointer;
}

.grade.trial:hover {
  color: #fff;
  -webkit-transform: scale(1.2);
      -ms-transform: scale(1.2);
          transform: scale(1.2);
  z-index: 1000;
}

.grade>.upper {
  /* filter: grayscale(1); */
  width: 100%;
  height: 170px;
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  font-size: 2em;
}

.trial>.upper {
  filter: none;
}

.grade-3a>.upper {
  background-image: url(../img/grades/1.jpg);
}

.grade-3a.trial>.upper {
  background-image: url(../img/grades/4.jpg);
}

.grade-3b>.upper {
  background-image: url(../img/grades/2.jpg);
}

.grade-4a>.upper {
  background-image: url(../img/grades/3.jpg);
}

.grade-4b>.upper {
  background-image: url(../img/grades/4.jpg);
}

.grade-5a>.upper {
  background-image: url(../img/grades/5.jpg);
}

.grade-5b>.upper {
  background-image: url(../img/grades/6.jpg);
}

.grade-6a>.upper {
  background-image: url(../img/grades/7.jpg);
}

.grade-6b>.upper {
  background-image: url(../img/grades/8.jpg);
}

.grade-7a>.upper {
  background-image: url(../img/grades/9.jpg);
}

.grade-7b>.upper {
  background-image: url(../img/grades/10.jpg);
}

.grade-8a>.upper {
  background-image: url(../img/grades/11.jpg);
}

.grade-8b>.upper {
  background-image: url(../img/grades/12.jpg);
}

.grade-9>.upper {
  background-image: url(../img/grades/13.jpg);
}

.grade>.upper>.mask {
  width: 100%;
  height: 100%;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
      -ms-flex-align: center;
          align-items: center;
  color: #fff;
  letter-spacing: 0.1em;
  font-weight: bolder;
  font-size: 1.2em;
}

.grade-3a>.upper>.mask,
.grade-6b>.upper>.mask {
  background-color: rgba(23, 152, 255, 0.7);
}

.trial>.upper>.mask {
  background-color: rgba(255, 239, 52, 0.7);
}

.grade-3b>.upper>.mask,
.grade-7a>.upper>.mask {
  background-color: rgba(52, 205, 20, 0.7);
}

.grade-4a>.upper>.mask,
.grade-7b>.upper>.mask {
  background-color: rgba(255, 83, 108, 0.8);
}

.grade-4b>.upper>.mask,
.grade-8a>.upper>.mask {
  background-color: rgba(0, 165, 255, 0.6);
}

.grade-5a>.upper>.mask,
.grade-8b>.upper>.mask {
  background-color: rgba(57, 64, 185, 0.7);
}

.grade-5b>.upper>.mask,
.grade-9>.upper>.mask {
  background-color: rgba(0, 206, 163, 0.7);
}

.grade-6a>.upper>.mask {
  background-color: rgba(0, 217, 236, 0.7);
}

.mask>.icon {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, .3);
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
      -ms-flex-align: center;
          align-items: center;
}

.mask>.icon>img {
  width: 50%;
}

.grade>.lower {
  width: 100%;
  height: 109px;
  background-color: #fff;
  padding: 16px 16px;
}

.grade>.lower>.title {
  color: #222;
  font-weight: bolder;
  font-size: 1.2em;
  margin-bottom: 0.5em;
}

.grade>.lower>.content {
  color: #777;
  font-size: 0.8em;
}

/* 比卡片上半部分遮罩层的颜色更深一些 */
/* .grade.trial>.lower>.title,
.grade.trial>.lower>.content {
  color: #0075d2;
} */

.feature-area {
  color: #fff;
}

.feature-area h2 {
  color: #fff;
  font-weight: bolder;
}

.feature-area .sec-title h2 .sec-title-border {
  border-top: 2px solid #fff;
}

.footer {
  padding: 35px 0;
  color: #fff;
  text-align: center;
}

.footer::before {
  opacity: 1;
}

.unit-wrapper {
  padding: 50px 0 40px;
}

.units {
  max-width: 1000px;
  margin: 0 auto;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-wrap: wrap;
      -ms-flex-wrap: wrap;
          flex-wrap: wrap;
  -webkit-box-pack: start;
  -webkit-justify-content: flex-start;
      -ms-flex-pack: start;
          justify-content: flex-start;
}

.unit {
  width: 33.3333%;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  padding: 0 3.5%;
  margin-bottom: 30px;
}

.unit>.upper {
  display: block;
  text-decoration: none;
}

.illustration-wrapper {
  height: 0px;
  padding-bottom: 70%;
  position: relative;
  overflow: hidden;
}

.illustration {
  height: 79.41%;
  position: absolute;
  bottom: 0px;
  width: 100%;
}

.illustration svg {
  width: 100%;
  height: auto;
  position: absolute;
  bottom: 0px;
  display: block;
}

.illustration-1 {
  background: rgb(255, 85, 110);
}

.unit-1 .upper svg {
  -webkit-transition: all 0.4s ease 0s;
  -o-transition: all 0.4s ease 0s;
  transition: all 0.4s ease 0s;
}

.unit-1 .upper:hover svg {
  bottom: -15px;
  -webkit-transform: scale(1.02) rotate(-1deg);
      -ms-transform: scale(1.02) rotate(-1deg);
          transform: scale(1.02) rotate(-1deg);
}

.unit-1 .upper:hover p, .unit-1 .lower .item-wrapper:hover {
  color: rgb(255, 85, 110);
  font-weight: bold;
}

.illustration-2 {
  background: rgb(138, 142, 216);
}

.unit-2 .upper svg .take-me-up,
.unit-2 .upper svg .take-me-down {
  position: relative;
  -webkit-transition: -webkit-transform 1s ease 0s;
  transition: -webkit-transform 1s ease 0s;
  -o-transition: transform 1s ease 0s;
  transition: transform 1s ease 0s;
  transition: transform 1s ease 0s, -webkit-transform 1s ease 0s;
}

.unit-2 .upper svg .take-me-up {
  -webkit-transform: translateY(20px);
      -ms-transform: translateY(20px);
          transform: translateY(20px);
}

.unit-2 .upper:hover svg .take-me-up {
  -webkit-transform: rotate(5deg) translateY(-26px);
      -ms-transform: rotate(5deg) translateY(-26px);
          transform: rotate(5deg) translateY(-26px);
}

.unit-2 .upper svg .take-me-down {
  -webkit-transform: translateY(20px);
      -ms-transform: translateY(20px);
          transform: translateY(20px);
}

.unit-2 .upper:hover svg .take-me-down {
  -webkit-transform: translateY(40px);
      -ms-transform: translateY(40px);
          transform: translateY(40px);
}

.unit-2 .upper svg .rotate-me {
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
  -webkit-transform-origin: 150px 100px;
      -ms-transform-origin: 150px 100px;
          transform-origin: 150px 100px;
  display: block;
  -webkit-transition: -webkit-transform 0.5s ease 0s;
  transition: -webkit-transform 0.5s ease 0s;
  -o-transition: transform 0.5s ease 0s;
  transition: transform 0.5s ease 0s;
  transition: transform 0.5s ease 0s, -webkit-transform 0.5s ease 0s;
}

.unit-2 .upper:hover svg .rotate-me {
  -webkit-transform: rotate(-20deg);
      -ms-transform: rotate(-20deg);
          transform: rotate(-20deg);
}

.unit-2 .upper:hover p, .unit-2 .lower .item-wrapper:hover {
  color: rgb(138, 142, 216);
  font-weight: bold;
}

.illustration-3 {
  background: rgb(80, 185, 232);
}

.unit-3 .upper svg .lines {
  -webkit-transform: translateX(500px);
      -ms-transform: translateX(500px);
          transform: translateX(500px);
}

.unit-3 .upper:hover svg .lines {
  -webkit-animation: 1s ease 0s infinite normal none running fly;
          animation: 1s ease 0s infinite normal none running fly;
}

@-webkit-keyframes fly {
  0% {
    -webkit-transform: translateX(500px);
            transform: translateX(500px);
  }

  100% {
    -webkit-transform: translateX(-500px);
            transform: translateX(-500px);
  }
}

@keyframes fly {
  0% {
    -webkit-transform: translateX(500px);
            transform: translateX(500px);
  }

  100% {
    -webkit-transform: translateX(-500px);
            transform: translateX(-500px);
  }
}

.unit-3 .upper svg .sun {
  -webkit-transform: translate(247px, 4px);
      -ms-transform: translate(247px, 4px);
          transform: translate(247px, 4px);
  -webkit-transition: -webkit-transform 0.5s ease 0s;
  transition: -webkit-transform 0.5s ease 0s;
  -o-transition: transform 0.5s ease 0s;
  transition: transform 0.5s ease 0s;
  transition: transform 0.5s ease 0s, -webkit-transform 0.5s ease 0s;
}

.unit-3 .upper:hover svg .sun {
  -webkit-transform: translate(207px, 4px);
      -ms-transform: translate(207px, 4px);
          transform: translate(207px, 4px);
  -webkit-transition: -webkit-transform 20s ease 0s;
  transition: -webkit-transform 20s ease 0s;
  -o-transition: transform 20s ease 0s;
  transition: transform 20s ease 0s;
  transition: transform 20s ease 0s, -webkit-transform 20s ease 0s;
}

.unit-3 .upper svg .car {
  -webkit-transform: translate(112px, 107px);
      -ms-transform: translate(112px, 107px);
          transform: translate(112px, 107px);
}

.unit-3 .upper:hover svg .car {
  -webkit-animation: 1s ease 0s infinite normal none running upanddown;
          animation: 1s ease 0s infinite normal none running upanddown;
}

@-webkit-keyframes upanddown {
  0% {
    -webkit-transform: translate(112px, 107px);
            transform: translate(112px, 107px);
  }

  50% {
    -webkit-transform: translate(112px, 106px);
            transform: translate(112px, 106px);
  }

  100% {
    -webkit-transform: translate(112px, 107px);
            transform: translate(112px, 107px);
  }
}

@keyframes upanddown {
  0% {
    -webkit-transform: translate(112px, 107px);
            transform: translate(112px, 107px);
  }

  50% {
    -webkit-transform: translate(112px, 106px);
            transform: translate(112px, 106px);
  }

  100% {
    -webkit-transform: translate(112px, 107px);
            transform: translate(112px, 107px);
  }
}

.unit-3 .upper:hover p, .unit-3 .lower .item-wrapper:hover {
  color: rgb(80, 185, 232);
  font-weight: bold;
}

.illustration-4 {
  background: rgb(225, 95, 189);
}

.unit-4 .upper svg .bubble-1 {
  -webkit-transition: opacity 0.3s ease 0s;
  -o-transition: opacity 0.3s ease 0s;
  transition: opacity 0.3s ease 0s;
}

.unit-4 .upper svg .bubble-2 {
  -webkit-transition: opacity 0.3s ease 0.1s;
  -o-transition: opacity 0.3s ease 0.1s;
  transition: opacity 0.3s ease 0.1s;
}

.unit-4 .upper:hover svg .bubble-1,
.unit-4 .upper:hover svg .bubble-2 {
  opacity: 1;
}

.unit-4 .upper:hover svg .bubble-1 {
  -webkit-transition: opacity 0.3s ease 0.1s;
  -o-transition: opacity 0.3s ease 0.1s;
  transition: opacity 0.3s ease 0.1s;
}

.unit-4 .upper:hover svg .bubble-2 {
  -webkit-transition: opacity 0.3s ease 0s;
  -o-transition: opacity 0.3s ease 0s;
  transition: opacity 0.3s ease 0s;
}

.unit-4 .upper:hover p, .unit-4 .lower .item-wrapper:hover {
  color: rgb(225, 95, 189);
  font-weight: bold;
}

.illustration-5 {
  background: rgb(0, 181, 170);
}

.unit-5 .upper svg .circle {
  fill: rgb(18, 116, 191);
}

.unit-5 .upper:hover svg .circle {
  fill: rgb(44, 230, 251);
}

.unit-5 .upper svg .circle-2 {
  -webkit-transition: fill 0.3s ease 0.2s;
  -o-transition: fill 0.3s ease 0.2s;
  transition: fill 0.3s ease 0.2s;
}

.unit-5 .upper svg .circle-3 {
  -webkit-transition: fill 0.3s ease 0.4s;
  -o-transition: fill 0.3s ease 0.4s;
  transition: fill 0.3s ease 0.4s;
}

.unit-5 .upper svg .circle-4 {
  -webkit-transition: fill 0.3s ease 0.6s;
  -o-transition: fill 0.3s ease 0.6s;
  transition: fill 0.3s ease 0.6s;
}

.unit-5 .upper svg .circle-5 {
  -webkit-transition: fill 0.3s ease 0.8s;
  -o-transition: fill 0.3s ease 0.8s;
  transition: fill 0.3s ease 0.8s;
}

.unit-5 .upper:hover p, .unit-5 .lower .item-wrapper:hover {
  color: rgb(0, 181, 170);
  font-weight: bold;
}

.illustration-6 {
  background: rgb(255, 192, 127);
}

.unit-6 .upper:hover svg .glow {
  -webkit-animation: 6s ease 0s infinite normal none running flick;
          animation: 6s ease 0s infinite normal none running flick;
}

@-webkit-keyframes flick {
  0% {
    opacity: 0.85;
    fill: rgb(95, 147, 255);
  }

  25% {
    opacity: 0.7;
    fill: rgb(90, 222, 228);
  }

  50% {
    opacity: 0.85;
    fill: rgb(95, 212, 255);
  }

  75% {
    opacity: 0.85;
    fill: rgb(255, 155, 183);
  }
}

@keyframes flick {
  0% {
    opacity: 0.85;
    fill: rgb(95, 147, 255);
  }

  25% {
    opacity: 0.7;
    fill: rgb(90, 222, 228);
  }

  50% {
    opacity: 0.85;
    fill: rgb(95, 212, 255);
  }

  75% {
    opacity: 0.85;
    fill: rgb(255, 155, 183);
  }
}

.unit-6 .upper:hover p, .unit-6 .lower .item-wrapper:hover {
  color: rgb(255, 192, 127);
  font-weight: bold;
}

.unit>.upper>.title {
  background-color: #fff;
  padding: 24px 24px 0;
  color: #29264c;
}

.unit>.upper>.title>.sub {
  margin: 0;
  font-size: 12px;
}

.unit>.upper>.title>.main {
  margin: 0;
  font-size: 17px;
  font-weight: bolder;
  line-height: 1.6em;
}

.unit>.lower {
  background-color: #fff;
  font-size: 12px;
  padding-bottom: 2em;
}

.unit>.lower>.head {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
      -ms-flex-pack: justify;
          justify-content: space-between;
  margin-left: 24px;
  margin-right: 24px;
  padding-top: 1.5em;
  padding-bottom: 0.5em;
  border-bottom: 1px solid rgb(233, 233, 237);
}

.unit>.lower>.head p {
  margin: 0;
  color: #9492a5;
}

.unit>.lower>.item-wrapper {
  display: block;
  color: rgb(41, 38, 76);
  margin-top: -1px;
  text-decoration: none;
  padding: 0px 2em;
  cursor: pointer;
}

.unit>.lower>.item-wrapper.unavailable {
  color: #bbb;
  pointer-events: none;
  cursor: not-allowed;
}

.unit>.lower>.item-wrapper.unavailable:hover {
  font-weight: normal;
}

.unit>.lower>.item-wrapper>.item {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
      -ms-flex-pack: justify;
          justify-content: space-between;
  margin-bottom: -1px;
  border-bottom: 1px solid rgb(233, 233, 237);
  padding: 0.8em 0px 0.5em;
}

.unit>.lower>.item-wrapper>.item>.progress {
  background-color: unset;
  color: #9492a5;
  height: auto;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

.anchor {
  cursor: pointer;
}

#navAnchor {
  display: none;
}

#navAnchor a.nolink {
  color: #c0c4cc;
}

.placeholder {
  opacity: 0;
  pointer-events: none;
}


/* 为课程试看临时设置的样式 */