.study-aid-center-banner-img{
    width: 100%;
}

.common-section {
    padding: 0 20px 24px;
}

/* 为什么需要 - 四张卡片轮播，白卡+标题高亮+列表 */
.study-aid-carousel-wrap {
    position: relative;
    margin-top: 12px;
}
.study-aid-carousel {
    overflow: hidden;
    /* padding-bottom: 28px; */
}
.study-aid-carousel .swiper-slide {
    padding: 0 2px;
}
.study-aid-card {
    padding: 12px 12px;
    background: #F2F6FC;
    box-shadow: 0px 2px 5px 0px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    min-height: 160px;
    box-sizing: border-box;
    transition: transform 0.25s ease, opacity 0.25s ease, filter 0.25s ease;
}
.study-aid-carousel .swiper-slide-prev .study-aid-card,
.study-aid-carousel .swiper-slide-next .study-aid-card {
    opacity: 0.5;
    /* filter: blur(2px); */
    /* transform: scale(0.96); */
}
.study-aid-carousel .swiper-slide-active .study-aid-card {
    opacity: 1;
    filter: none;
    transform: scale(1);
}
.study-aid-card-title {
    font-family: MiSans, sans-serif;
    font-size: 16px;
    font-weight: 600;
    line-height: 1.4;
    color: #333333;
    margin: 0 0 12px 0;
    text-align: center;
}
.study-aid-card-highlight {
    color: #2AB8D4;
}
.study-aid-card-list {
    background-color: #fff;
    border-radius: 4px;
    padding: 12px;
    margin: 0;
    font-family: MiSans, sans-serif;
    font-size: 12px;
    font-weight: 400;
    line-height: 1.5;
    color: #3D3D3D;
    height: 104px;
    text-align: left;
}
.study-aid-card-list li {
    margin-bottom: 6px;
    position: relative;
    padding-left: 6px;
}
.study-aid-card-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 2px;
    height: 2px;
    background: #3D3D3D;
}
.study-aid-card-list li:last-child {
    margin-bottom: 0;
}
.study-aid-pagination {
    bottom: 0;
}
.study-aid-pagination .swiper-pagination-bullet {
    background: #b0d8ee;
    opacity: 1;
}
.study-aid-pagination .swiper-pagination-bullet-active {
    background: #2e8fc7;
    width: 16px;
    border-radius: 4px;
}

/* 服务优势 - 轮播（4页，每页2张卡片，背景图+遮罩+白字） */
.study-aid-feature-carousel-wrap {
    position: relative;
    margin-top: 12px;
}
.study-aid-feature-carousel {
    overflow: hidden;
    padding-bottom: 24px;
}
.study-aid-feature-slide {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    padding: 0 2px;
}
.study-aid-feature-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background-color: #3E9BC9;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    min-height: 120px;
    padding: 0 12px;
}
.study-aid-feature-card-mask {
    /* position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background: rgba(62, 155, 201, 0.65);
    z-index: 0; */
}
.study-aid-feature-card-content {
    position: relative;
    z-index: 1;
    width: 100%;
    box-sizing: border-box;
}
.study-aid-feature-card-title {
    margin: 0 0 6px;
    font-family: MiSans, sans-serif;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.3;
    text-align: left;
    color: #FFFFFF;
    margin-top: 12px;
}

.study-aid-feature-card-highlight {
    font-family: MiSans;
    font-size: 20px;
    font-weight: 900;
    line-height: 20px;
    text-align: center;
    letter-spacing: 0em;
    
    font-variation-settings: "opsz" auto;
    font-feature-settings: "kern" on;
    color: #FFFFFF;
}
.study-aid-feature-card-desc {
    margin: 0;
    font-family: MiSans, sans-serif;
    font-size: 10px;
    font-weight: 400;
    line-height: 1.4;
    text-align: justify;
    color: #FFFFFF;
    margin-top: 6px;
    margin-left: 14px;
}
.study-aid-feature-pagination {
    top: 10px !important;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: #E5E5E5;
    border-radius: 2px;
    overflow: hidden;
    position: relative !important;
}
.study-aid-feature-pagination .swiper-pagination-progressbar-fill {
    background: #00D4FF !important;
    border-radius: 2px;
}

.appeal-img{
    width: 100%;
}

/* 产品服务流程 - 手风琴 */
.study-aid-process-accordion {
    margin-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.study-aid-process-item {
    background: #FFFFFF;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
    overflow: hidden;
}
.study-aid-process-item-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 14px 8px;
    cursor: pointer;
    position: relative;
    min-height: 24px;
}
.study-aid-process-item-num {
    position: absolute;
    left: 63px;
    top: -4px;
    opacity: 0.06;

    font-family: MiSans;
    font-size: 43px;
    font-weight: 900;
    line-height: normal;
    letter-spacing: 0em;
    
    font-variation-settings: "opsz" auto;
    font-feature-settings: "kern" on;
    color: #00C8FF;
}
.study-aid-process-item-icon {
    width: 34px;
    height: 30px;
    flex-shrink: 0;
    object-fit: contain;
    position: relative;
    z-index: 1;
}
.study-aid-process-item-title {
    flex: 1;
    margin: 0;
    font-family: MiSans;
    font-size: 16px;
    font-weight: 600;
    line-height: normal;
    letter-spacing: 0em;
    font-variation-settings: "opsz" auto;
    font-feature-settings: "kern" on;
    color: #3D3D3D;
    text-align: left;
}
.study-aid-process-item-arrow {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
    transition: transform 0.25s ease;
}
.study-aid-process-item-arrow::after {
    content: '';
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%) rotate(-45deg);
    width: 8px;
    height: 8px;
    border-right: 2px solid #666;
    border-bottom: 2px solid #666;
}
.study-aid-process-item.is-open .study-aid-process-item-arrow::after {
    transform: translateY(-50%) rotate(45deg);
}
.study-aid-process-item-body {
    display: none;
    padding: 0 16px 16px 66px;
}
.study-aid-process-item.is-open .study-aid-process-item-body {
    display: block;
}
.study-aid-process-item-desc {
    font-family: MiSans, sans-serif;
    font-size: 13px;
    font-weight: 400;
    line-height: 1.55;
    color: #666666;
    text-align: left;
    word-break: break-all;
}
.study-aid-process-sub {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.study-aid-process-sub-item {
    padding-bottom: 14px;
    border-bottom: 1px solid #F0F0F0;
}
.study-aid-process-sub-item:last-child {
    padding-bottom: 0;
    border-bottom: none;
}
.study-aid-process-sub-title {
    font-family: MiSans, sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: #333333;
    margin: 0 0 6px 0;
}
.study-aid-process-sub-desc {
    font-family: MiSans, sans-serif;
    font-size: 12px;
    font-weight: 400;
    line-height: 1.55;
    color: #666666;
    margin: 0;
}