a, blockquote, body, dd, div, dl, dt, fieldset, form, h1, h2, h3, h4, h5, h6, input, li, ol, p, pre, td, textarea, th, ul {
  margin: 0;
  padding: 0
}

li, ol, ul {
  list-style: none outside none
}

table {
  border-spacing: 0;
  border-collapse: collapse
}

fieldset, img {
  border: 0 none
}

div {
  box-sizing: border-box;
}

body {
  font-family: arial, Microsoft YaHei PingFangSC-Regular, HelveticaNeue-Light, 'Helvetica Neue Light', 'Microsoft YaHei', sans-serif;
  color: #333;
  -webkit-font-smoothing: antialiased;
  -moz-font-smoothing: antialiased;
}

input::-moz-focus-inner {
  padding: 0;
  border: none
}

button, input {
  font-family: Microsoft YaHei PingFangSC-Regular, HelveticaNeue-Light, 'Helvetica Neue Light', 'Microsoft YaHei', sans-serif;
  border: none;
  outline: 0
}

cite, em, i {
  font-style: normal;
  font-weight: normal;
}

a, a:link, a:active {
  text-decoration: none;
  outline: 0;
  color: rgba(102, 102, 102, 1)
}

.flex {
  display: flex;
  display: -webkit-flex;
  display: -webkit-box;
}

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

.fleft {
  float: left
}

.fright {
  float: right
}

.flex-box {
  -webkit-box-align: center;
  align-items: center;
  -webkit-align-items: center;
}

.flex-justify {
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
  justify-content: space-between;
}

.flex-center {
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
}

.flex-one {
  flex: 1;
  -webkit-flex: 1;
  -webkit-box-flex: 1;
}

a img {
  border: none
}

.pb70 {
  padding-bottom: 70px!important;
}

.pb30 {
  padding-bottom: 30px!important;
}

.tab-con>div {
  display: none;
}

.tab-con .manual {
  display: block;
}

.tab-title>div {
  display: inline-block;
  width: 49%;
  height: 48px;
  line-height: 48px;
  font-size: 18px;
  color: #333;
  font-weight: 500;
  text-align: center;
}

.tab-title .active {
  position: relative;
  color: #446cff;
}

.tab-title .active::after {
  content: '';
  width: 35px;
  height: 8px;
  border-radius: 4px;
  position: absolute;
  bottom: 0;
  left: 75px;
  background-color: #446cff;
}

.banner {
  position: relative;
  width: 100%;
  vertical-align: bottom;
  z-index: 2;
}

.crumb {
  width: 1080px;
  margin: 0 auto;
}

.crumb-con {
  position: absolute;
  top: 20px;
  width: 235px;
  height: 35px;
  line-height: 36px;
  border-radius: 4px;
  background-color: rgba(0,0,0,0.3);
  color: #fff;
  text-align: center;
  z-index: 7;
}

.crumb a {
  color: #fff;
}
/* manual */

.manual .goBooks {
  position: absolute;
  right: 0;
  top: 140px;
  width: 125px;
  height: 50px;
  border-bottom-left-radius: 50px;
  border-top-left-radius: 50px;
  background-color: #feba02;
  color: #fff;
  font-size: 20px;
  text-align: center;
  line-height: 50px;
  cursor: pointer;
  z-index: 5;
}

.manual {
  position: relative;
  background-color: #4551d8;
  padding-bottom: 30px;
}

.goIndex img {
  position: absolute;
  top: 10px;
  left: 20px;
  width: 19px;
}

.con {
  position: relative;
  width: 1080px;
  padding: 65px 40px;
  background-color: #fff;
  margin: 0 auto;
  margin-bottom: 50px;
}

.con:nth-last-child(2) {
  margin-bottom: 100px;
}

.con .bg {
  position: absolute;
  top: 60px;
  left: -20px;
}

.con1 .bg {
  top: 80px;
}

.con .bg img {
  height: 48px;
}

.con .bg span {
  position: absolute;
  top: 2px;
  left: 35px;
  color: #fff;
  font-weight: 700;
  font-size: 30px;
  /* text-align: center; */
  line-height: 46px;
}

.con .bg .bg1 {
  position: absolute;
  left: -10px;
}

.con1 {
  position: relative;
  padding-top: 80px;
  margin-top: -70px;
}

.con .title {
  color: #494ae9;
  font-weight: 600;
  font-size: 30px;
  padding-bottom: 30px;
  padding-left: 85px;
  letter-spacing: 5px;
}

.con1 .title {
  margin-bottom: 35px;
  border-bottom: 2px dashed #3498f1;
}

.border {
  padding-bottom: 12px;
  border-bottom: 2px dashed #3498f1;
}

.first-text {
  position: relative;
  display: inline-block;
  width: 200px;
  height: 20px;
  font-size: 30px;
  color: #446cff;
  background-color: #e5e7ff;
}

.first-text em {
  position: absolute;
  top: -15px;
  width: 100%;
  font-weight: 600;
  text-align: center;
}

.manual-con p {
  text-align: justify;
  margin-top: 30px;
  font-size: 20px;
  color: #292929;
  font-weight: 500;
  line-height: 32px;
}

.manual-con p:nth-child(1) {
  margin-top: 0;
}

.con .line .left,
.con .line .right {
  position: absolute;
  top: -90px;
  /* height: 61px; */
  width: 24px;
}
.con .line .left {
  left: 95px;
}
.con .line .right {
  right: 95px;
}

.square {
  position: relative;
  padding-left: 50px;
}

.square span {
  position: absolute;
  left: 0;
  top: 2px;
  display: inline-block;
  width: 28px;
  height: 28px;
  line-height: 28px;
  border-radius: 4px;
  background-color: #446cff;
  color: #fff;
  text-align: center;
}

.circle {
  position: relative;
  padding-left: 55px;
}

.circle img {
  position: absolute;
  left: 0;
  top: 4px;
  width: 26px;
}

.diamond {
  position: relative;
  padding-left: 35px;
}

.diamond img {
  position: absolute;
  left: 0;
  top: 6px;
  width: 18px;
}

.star {
  position: relative;
  padding-left: 50px;
}

.star img {
  position: absolute;
  left: 0;
  top: 5px;
  width: 20px;
}

.tips {
  position: absolute;
  top: -85px;
  left: 50%;
  transform: translateX(-50%);
}

.tips img {
  height: 150px;
}
/* books */

.books {
  position: relative;
  background-color: #ddeffb;
  padding-bottom: 20px;
}

.books .goManual {
  position: absolute;
  right: 0;
  top: 140px;
  width: 125px;
  height: 50px;
  border-bottom-left-radius: 50px;
  border-top-left-radius: 50px;
  background-color: #feba02;
  color: #fff;
  font-size: 20px;
  text-align: center;
  line-height: 50px;
  cursor: pointer;
  z-index: 5;
}

.books .book-recommend {
  width: 1080px;
  margin: 0 auto;
}

.books h3 {
  position: relative;
  text-align: center;
  color: #446cff;
  font-size: 64px;
  font-weight: 500;
  margin: 10px 0;
}

.books h3::before {
  content: url(./imgs/ornament1.png);
  position: relative;
  top: 3px;
  margin-right: 15px;
}

.books h3::after {
  content: url(./imgs/ornament2.png);
  position: relative;
  top: 3px;
  margin-left: 20px;
}

.books .bookCover img {
  width: 235px;
}

.books .book-list {
  padding: 30px;
  background-color: #fff;
  margin-bottom: 20px;
}

.book-list .bookCover {
  margin-right: 40px;
}

.book-list .bookname {
  font-size: 28px;
  color: #333;
  font-weight: 700;
  margin-top: 28px;
}

.book-list .introduction {
  font-size: 18px;
  color: #999;
  margin: 40px 0;
  height: 110px;
  overflow: hidden;
  line-height: 36px;
}

.book-list .author {
  position: relative;
  font-size: 16px;
  color: #666;
}

.book-list button {
  position: absolute;
  top: -8px;
  right: 0;
  width: 110px;
  height: 32px;
  border-radius: 16px;
  border: none;
  background: linear-gradient(90deg, #ffae4e, #ff4b4b);
}

.book-list button a {
  color: #fff;
  font-size: 16px;
}

.footer {
  text-align: center;
}