body {
  background: url("../assets/base/bg.png") no-repeat center center;
  background-size: 100% 100%;
  position: relative;
  height: 100%;
  overflow: hidden;
}

header {
  height: 2.2rem;
  width: 100%;
  display: flex;
  align-items: center;
}

header .logo {
  margin-left: 0.54rem;
  margin-right: 2rem;
}

header .logo img {
  width: 0.94rem;
}

header .title {
  background: url("../assets/base/title-line.png") no-repeat center center;
  background-size: 100% 100%;
  width: 13.5rem;
  height: 0.32rem;
  text-align: center;
  color: #296a90;
  margin-top: 0.2rem;
}
header .title h1 {
  font-size: 0.54rem;
  width: 7.4rem;
  margin: -0.6rem auto 0.2rem;
  font-weight: 600;
}

header .title .sign {
  background: url("../assets/base/sign-line.png") no-repeat center center;
  background-size: 100% 100%;
  display: flex;
  justify-content: center;
  width: 10.2rem;
  margin: 0 auto;
}

header .title .sign p {
  font-size: .3rem;
}

section {
    position: relative;
    width: 100%;
    height: 7.5rem;
    margin: 0 auto;
}

section .item-box {
    display: flex;
    justify-content: space-around;
    margin-top: .8rem;
}

section .item-box .item {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
}

section .item-box .item .item-top {
    width: 3.2rem;
    height: 3.4rem;
    position: relative;
}
section .item-box .item .item-top.item-top-left{
  background: url('../assets/base/item1-cricle.png') no-repeat center center;
    background-size: 100% 100%;
}
section .item-box .item .item-top-center1 {
    background: url('../assets/base/item2-cricle.png') no-repeat center center;
    background-size: 100% 100%;
}
section .item-box .item .item-top-center2 {
  background: url('../assets/base/item3-cricle.png') no-repeat center center;
  background-size: 100% 100%;
}
section .item-box .item .item-top-center3 {
    background: url('../assets/base/item4-cricle.png') no-repeat center center;
    background-size: 100% 100%;
}
section .item-box .item .item-top-right {
    background: url('../assets/base/item5-cricle.png') no-repeat center center;
    background-size: 100% 100%;
}

section .item-box .item .item-checked {
    width: 2.8rem;
    height: 2.8rem;
    top: .35rem;
    position: absolute;
    opacity:0;
    transition:opacity .3s;
}

section .item-box .item .item-checked-rec {
    width: 0;
    height: .79rem;
    bottom: .02rem;
    position: absolute;
    opacity:0;
    transition:all .3s;
}

section .item-box .item:hover .item-checked {
    opacity:1;
    cursor: pointer;
}

section .item-box .item:hover .item-checked-rec {
    width: 3.53rem;
    opacity:1;
    cursor: pointer;
}

section .item-box .item .item-top img {
    position: absolute;
    width: 1.4rem;
    height: .4rem;
    left: .9rem;
    top: .45rem;
}

section .item-box .item .item-bottom {
    background: url('../assets/base/rectangle.png') no-repeat center center;
    background-size: 100% 100%;
    width: 3.57rem;
    height: .83rem;
    padding: .06rem 0;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
}

section .item-box .item .item-bottom p {
    font-size: .26rem;
    font-weight: 300;
    line-height: 1.2;
}

section .stage-box {
    background: url('../assets/base/stage.png') no-repeat center center;
    background-size: 100% 100%;
    width: 11.25rem;
    height: 3rem;
    margin: 0 auto;
}

.stage-bottom {
    text-align: center;
    color: #296a90;
    font-size: .28rem;
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
}
.stage-bottom img {
    width: .3rem;
    margin-top: .05rem;
}

.stage-box {
    text-align: center;
}

.stage-box img {
    width: 2.16rem;
    height: 2.11rem;
    margin-top: .1rem;
}

.grade-btn {
    background-image: url('../assets/base/to-grade-normal.png');
    background-repeat: no-repeat;
    background-size: 100% 100%;
    width: 3.3rem;
    height: 1rem;
    margin: -0.5rem auto 0;

}

.grade-btn:hover {
    background-image: url('../assets/base/to-grade.png');
    cursor: pointer;
}