* {
    box-sizing: border-box;
}
:root {
    --padding: 0 30px;
    --mo-padding: 0 20px;
    --border-ra: 20px
}
.inner {
    max-width: 1200px;
    padding: var(--padding);
    height: 100%;
    width: 100%;
    margin: 0 auto;
}
main {
    margin: 75px 0 60px;
}
/* header */
header {
    position: fixed;
    left: 0; top: 0;
    width: 100%; height: 70px;
    background: #fff;
    z-index: 999;
}
header.on {
    border-bottom: 1px solid #555555;
}
header .header_inner {
    max-width: 1200px;
    padding: 20px 30px;
    height: 100%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0 auto;
}
header .header_inner .left {
    display: block;
    height: 30px;
}
header .header_inner .left img {
    display: block;
    height: 100%;
}
header .header_inner .right {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    width: 70%;
}
header .header_inner .right li:nth-child(2) {
    position: relative;
}
header .header_inner .right li a {
    display: block;
    text-align: center;
    padding: 0 30px;
    font-size: 17px;
}
header .header_inner .right li:nth-child(2) a:before {
    position: absolute;
    content: '';
    left: 0; top: 50%;
    transform: translateY(-50%);
    width: 1px; height: 70%;
    background: #646464;
}
header .header_inner .right li:nth-child(2) a:after {
    position: absolute;
    content: '';
    right: 0; top: 50%;
    transform: translateY(-50%);
    width: 1px; height: 70%;
    background: #646464;
}


/* index */
.index_banner {
    background: url(../img/pc-mian-img.png) no-repeat center/cover;
    width: 100%; height: 340px;
    border-radius: var(--border-ra);
    display: flex;
    justify-content: center;
    align-items: center;
}
.index_banner h1 {
    font-size: 25px;
    color: #fff;
    text-align: center;
    line-height: 1.3;
    font-weight: 600;
}
.index_btns {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 60px;
}
.index_btns > div {
    width: calc(50% - 30px);
}
.index_btns > div h2 {
    font-size: 20px;
    color: #404040;
    font-weight: 700;
    text-align: center;
    line-height: 1.3;
    margin-bottom: 30px;
}
.index_btns > div h2 strong {
    color: #110D52;
    font-size: 20px;
    font-weight: 700;
}
.index_btns .btns {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}
.index_btns .btns li {
    width: calc(50% - 10px);
    height: 180px;
}
.index_btns .btns li a {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background: #ECEFF4;
    height: 100%;
    border-radius: var(--border-ra);
    gap: 20px;
}
.index_btns .btns li a img {
    display: block;
    width: 60px; height: 60px;
}
.index_btns .btns li a p {
    font-size: 19px;
    color: #221E5E;
    font-weight: 600;
}
.index_btm {
    margin-top: 60px;
    height: 225px;
    background: url(../img/pc-main-banner.png) no-repeat center/contain;
    display: flex;
    align-items: center;
    padding-left: 70px;
}
.index_btm h3 {
    font-size: 22px;
    color: #444444;
    line-height: 1.4;
}
.index_btm h3 strong {
    color: #1F1B5C;
    font-weight: 700;
    font-size: 24px;
}

/* sub */
.sub_top {
    padding: 30px 0 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 15px;
}
.sub_top img {
    display: block;
    width: 40px; height: 40px;
}
.sub_top h1 {
    font-size: 24px;
    font-weight: 700;
    color: #181457;
}
.sub_bold {
    font-size: 21px;
    color: #252160;
    font-weight: 700;
    padding: 30px 0 20px;
}
.sub_cont {
    font-size: 17px;
    color: #5B5B5B;
    line-height: 1.4;
}
.sub_cont .point3 {
    font-size: 18px;
    color: #5B5B5B;
    font-weight: 600;
}
.sub_link {
    background: #ECEFF4;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 80px;
    border-radius: var(--border-ra);
    margin-top: 60px;
}
.sub_link img {
    display: block;
    width: 80px; height: 80px;
    object-fit: contain;
}
.sub_link span {
    font-size: 19px;
    color: #201C5D;
    font-weight: 600;
}





@media screen and (max-width: 781px) {
    header .header_inner {
        padding: 20px;
    }
    .inner {
        padding: var(--mo-padding);
    }
    header .header_inner .left {
        height: 2.7rem;
    }
    header .header_inner .right li a {
        padding: 0 2rem;
        font-size: 1.6rem;
    }
    .index_banner {
        background: url(../img/mo-main-img.png) no-repeat center/cover;
        border-radius: var(--border-ra);
        height: 40rem;
    }
    .index_banner h1 {
        font-size: 2.3rem;
    }
    .index_btns {
        flex-direction: column;
        gap: 8rem;
    }
    .index_btns > div {
        width: 100%;
    }
    .index_btns .btns li {
        height: 20rem;
    }
    .index_btm {
        margin-top: 4rem;
        background: url(../img/mo-main-banner.png) no-repeat center/contain;
        height: 21rem;
    }
    .index_btm {
        padding-left: 5rem;
    }
    .index_btm h3 {
        font-size: 2rem;
    }
    .index_btm h3 strong {
        font-size: 2.3rem;
    }
    .sub_bold {
        font-size: 2rem;
    }
}
@media screen and (max-width: 400px) {
    .index_banner {
        height: 32rem;
    }
    header .header_inner .left {
        height: 2.2rem;
    }
    header .header_inner .right li a {
        padding: 0 1.5rem;
    }
    .index_banner h1 {
        font-size: 2rem;
    }
    .index_btm {
        padding-left: 2rem;
        height: 11rem;
    }
    .index_btm h3 {
        font-size: 1.6rem;
    }
    .index_btm h3 strong {
        font-size: 2rem;
    }
    .index_btns {
        gap: 5rem;
    }
    .index_btns .btns li a p {
        font-size: 1.7rem;
    }
    .index_btns .btns li a img {
        width: 4.5rem; height: 4.5rem;
    }
}