.top-bg {
    width: 1400px;
    height: 370px;
    padding-left: 600px;
    padding-top: 100px;
    box-sizing: border-box;
}

.bg1 {
    background: url(../asset/product/top-bg.png) no-repeat;
    background-size: 100% 100%;
}

.bg2 {
    background: url(../asset/product/top-bg2.png) no-repeat;
    background-size: 100% 100%;
}

.bg3 {
    background: url(../asset/product/top-bg3.png) no-repeat;
    background-size: 100% 100%;
}

.top-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 60px;
}

.nav-item {
    margin: 0 25px;
    font-size: 34px;
    color: #1F3553;
    cursor: pointer;
}

.nav-item-acitve {
    font-family: 'sHeavy';
    font-size: 40px;
    color: #03102a;
}

.nav-msg {
    font-size: 18px;
    color: #41536b;
    display: none;
    text-align: left;
    width: 70%;
}

.nav-msg-active {
    display: inline-block;
}

.content {
    display: none;
}

.content-active {
    display: flex;
    flex-direction: column;
}

.line {
    padding: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.line-bg {
    background-color: #F2F6FC;
}

.cont-tit {
    font-size: 28px;
    line-height: 28px;
    font-family: 'sHeavy';
    margin-bottom: 14px;
}

.cont-tit2 {
    font-size: 28px;
    line-height: 56px;
    font-family: 'sHeavy';
    background-color: #e6edf8;
    padding-left: 20px;
    margin-bottom: 16px;
}

.cont-msg {
    font-size: 16px;
    color: #353B44;
    line-height: 32px;
}

.cont-msg2 {
    font-size: 16px;
    color: #353B44;
    line-height: 32px;
    padding-left: 20px;
}

.line-item {
    margin: 0 50px;
    min-height: 280px;
    width: 640px;
    text-align: left;

    img {
        height: 280px;
        width: 540px;
        border-radius: 6px;
    }
}

.line-border {
    border: 1px solid #e6edf8;
    border-top-left-radius: 6px;
    border-top-right-radius: 6px;
    padding-bottom: 12px;
}

.big-tit {
    font-size: 32px;
    line-height: 32px;
    font-family: 'sHeavy';
    color: #000012;
    padding: 50px 0;
}