.ct-collapse-group {
    border: 1px solid $border-color;
    background: #f7f7f7;
    .ct-collapse {
        border-top:1px solid $border-color;
        &:first-child {
            border-top: none;
        } 
        .ct-collapse-header {
            // height: 35px;
            line-height: 35px;
            padding: 0 40px 0 15px;
            box-sizing: border-box;
            position: relative;
            .ct-collapse-title {
                display: inline-block;
                font-size: 12px;
            }
            .ct-collapse-icon {
                position: absolute;
                top: -2px;
                right: 15px;
                .icon-arrow-top {
                    display: inline-block;
                    font-size: 14px;
                    margin-right: 10px;
                    transition: .3s ease;
                    font-weight: 600;
                    position: absolute;
                    right: 0;
                    top: 12px;
                    margin-right: 0;
                }
                &.is-active {
                    .icon-arrow-top {
                        transform: rotate(90deg);
                    }
                }
            }
        }
        .ct-collapse-content {
            padding:0 15px;
            background:#fff;
            z-index: 100;
            border-top: 1px solid $border-color;
            .ct-collapse-wrap {
                padding:  15px 0;
            }

        }
        &.is-active {
            .ct-collapse-header {
                .icon-jiantou-zuo {
                    transform: rotate(90deg);
                }
            }
        }
    }
}