.section-inner {
    position: relative;
    width: 100%;
    max-width: 1440px;
    padding: 0 20px;
    margin: 0 auto;
}

.banner-wrap {
    position: relative;
    width: 100%;
    /* height: 450px; */
    position: relative;
    width: 100%;
    height: 0;
    padding-top: 27%;
    /* 大致4:1的banner */
}

.banner-inner {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.banner-inner,
.swiper-container,
.banner-item {
    width: 100%;
    height: 100%;
}

.banner-item>img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.swiper-pagination-bullet {
    background-color: #FFF !important;
    opacity: 0.4 !important;
}

.swiper-pagination-bullet-active {
    opacity: 1 !important;
}

.banner-swipe-wrap {
    z-index: 2;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.banner-swipe-left,
.banner-swipe-right {
    position: absolute;
    z-index: 2;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    cursor: pointer;
}

.banner-swipe-right {
    right: 0;
    left: unset;
}


/* course-wrap */
.course-wrap {
    padding: 60px 0;
    min-height: 60vh;
}

.course-class-list {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    font-size: 25px;
    margin-bottom: 25px;
    grid-gap: 10px 40px;
    /* white-space: nowrap; */
    /* overflow: auto; */
}

.course-class-item {
    cursor: pointer;
    transition: .3s ease;
    transition-property: font-weight;
    will-change: font-weight;
    font-weight: 300;
}

.course-class-item.active {
    font-weight: bold;
}

.course-inner {
    display: grid;
    grid-template-columns: repeat(auto-fill, 335px);
    flex-wrap: wrap;
    justify-content: space-around;
    padding: 20px;
    border: 1px solid #D1D7DC;
}

.course-data-wrap{
    position: relative;
}

.course-inner.no-data-flex {
    display: flex;
}


@media screen and (max-width: 600px) {
    .banner-wrap {
        /* padding-top: 50%; */
    }

    .course-class-list {
        margin-bottom: 15px;
        grid-gap: 10px 30px;
    }

    .course-class-item {
        font-size: 20px;
    }

    .banner-inner-box {
        max-width: 100%;
    }

    .banner-inner-box>h2 {
        font-size: 20px;
    }

    .banner-inner-box>p {
        font-size: 13px;
    }

    .banner-inner-box {
        font-size: 14px;
    }

    .course-wrap {
        padding: 20px 0;
    }

    .course-title {
        margin-bottom: 20px;
        font-size: 18px;
    }

    .course-inner {
        grid-template-columns: repeat(auto-fill, 100%);
        grid-gap: 40px;
    }
}