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
}


/*垂直居中*/

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


/*均匀分列每个子集元素间距*/

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


/*水平居中*/

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


/*弹性盒子剩余的宽度*/

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

a img {
    border: none
}

.tab-con {
    margin-top: 7px;
}

.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 {
    color: #446cff;
}

.tab-title .active::after {
    content: '';
    width: 35px;
    height: 8px;
    border-radius: 4px;
    display: block;
    margin: -10px auto;
    background-color: #446cff;
}

.banner {
    width: 100%;
    vertical-align: bottom;
}


/* manual */

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

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

.con {
    position: relative;
    padding: 40px 22px;
    background-color: #fff;
    margin: 0 16px;
    margin-bottom: 20px;
}

.con:nth-last-child(2) {
    margin-bottom: 40px;
}

.con .bg {
    position: absolute;
    top: 39px;
    left: -12px;
}

.con1 .bg {
    top: 10px;
}

.con .bg img {
    height: 25px;
}

.con .bg span {
    position: absolute;
    top: 2px;
    left: 20px;
    color: #fff;
    font-weight: 700;
    font-size: 18px;
}

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

.con1 {
    padding-top: 10px;
}

.con .title {
    color: #494ae9;
    font-weight: 600;
    font-size: 16px;
    padding-bottom: 15px;
    padding-left: 30px;
    /* white-space: nowrap; */
}

.con1 .title {
    margin-bottom: 22px;
    border-bottom: 2px dashed #3498f1;
}

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

.first-text {
    position: relative;
    display: inline-block;
    width: 100px;
    height: 15px;
    font-size: 18px;
    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: 25px;
    font-size: 14px;
    color: #292929;
    font-weight: 600;
    line-height: 24px;
}

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

.con .line .left,
.con .line .right {
    position: absolute;
    top: -40px;
    height: 61px;
}

.con .line .left {
    left: 50px;
}

.con .line .right {
    right: 50px;
}

.square {
    position: relative;
    padding-left: 30px;
}

.square span {
    position: absolute;
    left: 0;
    display: inline-block;
    width: 22px;
    height: 22px;
    line-height: 22px;
    border-radius: 4px;
    background-color: #446cff;
    color: #fff;
    text-align: center;
}

.circle {
    position: relative;
    padding-left: 25px;
}

.circle img {
    position: absolute;
    left: 0;
    top: 2px;
    width: 18px;
}

.diamond {
    position: relative;
    padding-left: 20px;
}

.diamond img {
    position: absolute;
    left: 0;
    top: 4px;
    width: 14px;
}

.star {
    position: relative;
    padding-left: 20px;
}

.star img {
    position: absolute;
    left: 0;
    top: 5px;
    width: 14px;
}

.tips {
    position: absolute;
    top: -35px;
    left: 50%;
    transform: translateX(-50%);
}

.tips img {
    height: 71px;
}


/* books */

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

.books .book-recommend {
    margin: 0 12px;
}

.books h3 {
    position: relative;
    text-align: center;
    color: #446cff;
    font-size: 20px;
    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: 105px;
}

.books .book-list {
    padding: 12px;
    background-color: #fff;
    margin-bottom: 20px;
}

.book-list .bookCover {
    margin-right: 10px;
}

.book-list .bookname {
    font-size: 16px;
    color: #333;
    font-weight: 700;
}

.book-list .introduction {
    font-size: 12px;
    color: #999;
    margin: 15px 0;
    height: 65px;
    overflow: hidden;
}

.book-list .author {
    position: relative;
    font-size: 12px;
    color: #666;
}

.book-list button {
    position: absolute;
    top: -8px;
    right: 0;
    width: 92px;
    height: 32px;
    border-radius: 16px;
    border: none;
    background: linear-gradient(90deg, #ffae4e, #ff4b4b);
}

.book-list button a {
    color: #fff;
}

.footer {
    text-align: center;
}