body {
    padding-bottom: 49px;
    box-sizing: border-box;
}

.tw1 {
    position: relative;
}

.tw1 .back {
    width: 10.5px;
    height: 17.5px;
    left: 20px;
    top: 20px;
    position: absolute;
}

.tw1 h1 {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    font-size: 28.22px;
    color: #ffffff;
}

/* 课程类型 */
.tw2 {
    position: relative;
    z-index: 3;
    background-color: #ffffff;
    border-radius: 15px 15px 0px 0px;
    width: 100%;
    display: flex;
    padding: 15px;
    box-sizing: border-box;
    margin-top: -30px;
    overflow-x: auto;
}

.tw2 a {
    position: relative;
    text-wrap: nowrap;
    font-size: 15px;
    color: #666666;
    margin-right: 20px;
}

.tw2 .bs {
    color: #000000;
}

.tw2 .bs::after {
    content: '';
    display: block;
    width: 15px;
    position: absolute;
    bottom: -9.5px;
    left: 50%;
    z-index: 4;
    transform: translateX(-50%);
    height: 3px;
    background-color: #094116;
    border-radius: 1.5px;
}

.tw_main2 {
    width: 92vw;
    margin: auto;
    margin-top: 20px;
}

/* 课程级别 */
.tw3 {
    display: flex;
    overflow: auto;
}

.tw3 a {
    display: block;
    font-size: 12px;
    color: #000000;
    padding: 0 10px;
    line-height: 29.5px;
    background-color: rgba(0, 0, 0, .04);
    border-radius: 14.75px;
    margin-right: 15px;
    text-wrap: nowrap;
}

.tw3 .bs {
    color: #094116;
}

/* 课程介绍 */
.tw4 {
    margin-top: 14.5px;
    padding: 15.5px 21.5px 19.5px 12.5px;
    background-image: linear-gradient(180deg,
            rgba(9, 65, 22, 0.04) 0%,
            rgba(9, 65, 22, 0.04) 100%);
    border-radius: 15px 15px 0px 0px;
}

.tw4 h1 {
    font-size: 12px;
    line-height: 20px;
    color: #000000;
}

/* 视频课程 */
.tw5_1 {
    display: block;
    box-shadow: 0px 0px 9px 0px rgba(51, 51, 51, 0.13);
    border-radius: 5px;
    margin-bottom: 20.5px;
}

.tw5_1 .msgbox {
    display: flex;
    height: 66px;
    padding: 0 4%;
    box-sizing: border-box;
    justify-content: space-between;
    align-items: center;
}

.tw5_1 .msgbox h2 {
    display: flex;
    align-items: center;
}

.tw5_1 .msgbox h2 span {
    margin-left: 5px;
}

.tw5_1 .msgbox h2 img {
    width: 18px;
}