ul, ol, h1, h2, h3, h4, p {
    margin: 0;
    padding: 0;
    font-weight: normal;
}

@media screen and (min-width: 786px) {
    main {
      background: #f0f0f0;
      min-width: 1200px;
    }
  
    .banner {
      width: 100%;
      height: 300px;
      margin-top: 90px;
      background: url(../img/banner.jpg) no-repeat center center;
      background-size: cover;
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
      flex-direction: column;
      opacity: 1;
    }

    .banner::before {
        content: "";
        position: absolute;
        left: 0;
        right: 0;
        bottom: 0;
        top: 0;
        background-color: rgba(0, 0, 0, .5);
        z-index: 2;
    }

    .banner h1,
    .banner p {
        color: #fff;
        font-size: 32px;
        z-index: 9;
    }

    .banner h1 {
        font-size: 48px;
        font-weight: 600;
    }

    .join_info {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 1000px;
        margin: 120px auto 30px;
    }

    .info_img {
        margin-right: 80px;
        position: relative;
    }

    .join_info .info_img img {
        width: 430px;
        height: 280px;
        min-width: 430px;
    }

     .join_info .info_img:after {
        content: '我们的承诺';
        display: inline-block;
        position: absolute;
        right: -40px;
        top: -20px;
        width: 150px;
        height: 110px;
        padding: 20px 30px;
        background: #ee5030;
        box-sizing: border-box;
        color: #fff;
        font-size: 30px;
        line-height: 36px;
        font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Heiti SC", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    }

    .join_ul li .title a img {
        width: 20px;
        height: 14px;
        min-width: 20px;
        margin-right: 10px;
    }

    .join_ul li .title a {
        color: #999;
        font-size: 16px;
        line-height: 20px;
    }

    .info_txt>p {
        color: #333;
        font-size: 16px;
        line-height: 32px;
        margin-bottom: 20px;
    }

    .info_txt>ul>li {
        color: #333;
        font-size: 14px;
        line-height: 32px;
        list-style: inside;
    }

    .join_ul {
        display: flex;
        flex-direction: column;
        margin-top: 40px;
        width: 1000px;
        margin: 40px auto 0;
        padding-bottom: 40px;
    }

    .join_ul li {
        background: #FAFBFF;
        border-radius: 4px;
        padding: 30px 40px;
        margin-bottom: 20px;
        list-style: none;
    }

    .join_ul li .title {
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-bottom: 1px solid #F0F0F0;
    }

    .join_ul li .title h3 {
        color: #ee5030;
        font-size: 22px;
        line-height: 24px;
        padding-left: 10px;
        border-left: 6px solid #ee5030;
        margin-bottom: 10px;
    }

    .join_ul li .content {
        padding: 20px;
        padding-bottom: 0;
    }

    .content .item {
        margin-bottom: 20px;
    }

    .join_ul li .content .item>h4 {
        color: #333;
        font-size: 18px;
        line-height: 24px;
        margin-bottom: 10px;
    }

    .content .item>p {
        color: #666;
        font-size: 16px;
        line-height: 26px;
    }
}  

@media screen and (max-width: 786px) {
    main {
      background: #f0f0f0;
    }
  
    .banner {
      width: 100%;
      height: 200px;
      background: url(../img/jobs/banner.jpg) no-repeat center center;
      background-size: cover;
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
      flex-direction: column;
      opacity: 1;
    }

    .banner::before {
        content: "";
        position: absolute;
        left: 0;
        right: 0;
        bottom: 0;
        top: 0;
        background-color: rgba(0, 0, 0, .5);
        z-index: 2;
    }

    .banner h1,
    .banner p {
        color: #fff;
        z-index: 9;
    }

    .banner h1 {
        font-size: 32px;
        font-weight: 600;
    }

    .banner p {
        color: #fff;
        font-size: 18px;
        z-index: 9;
    }

    .join_info {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
        margin: 50px auto 30px;
        flex-wrap: wrap;
    }

    .info_img {
        padding: 0 20px;
        position: relative;
    }

    .join_info .info_img img {
        width: 100%;
        display: block;
        margin:  0 auto;
    }

     .join_info .info_img:after {
        content: '我们的承诺';
        display: block;
        text-align: center;
        padding: 20px 0;
        box-sizing: border-box;
        background-color: #1a1a1a;
        color: #fff;
        font-size: 30px;
        line-height: 36px;
    }

    .join_ul li .title a img {
        width: 20px;
        height: 14px;
        min-width: 20px;
        margin-right: 5px;
    }

    .join_ul li .title a {
        color: #999;
        font-size: 12px;
        line-height: 20px;
        display: none;
    }

    .info_txt>p {
        color: #333;
        font-size: 16px;
        line-height: 32px;
        margin-bottom: 20px;
        padding: 50px 20px 0;
    }

    .info_txt>ul>li {
        color: #333;
        font-size: 14px;
        line-height: 32px;
        list-style: inside;
        padding: 0 20px;
    }

    .join_ul {
        display: flex;
        flex-direction: column;
        margin-top: 40px;
        width: 90%;
        margin: 40px auto 0;
    }

    .join_ul li {
        background: #FAFBFF;
        border-radius: 4px;
        padding: 30px 40px;
        margin-bottom: 20px;
        list-style: none;
    }

    .join_ul li .title {
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-bottom: 1px solid #F0F0F0;
    }

    .join_ul li .title h3 {
        color: #333;
        font-size: 18px;
        line-height: 24px;
        padding-left: 10px;
        border-left: 6px solid #1a1a1a;
        margin-bottom: 10px;
    }

    .join_ul li .content {
        padding: 20px 0;
        padding-bottom: 0;
    }

    .content .item {
        margin-bottom: 20px;
    }

    .join_ul li .content .item>h4 {
        color: #333;
        font-size: 16px;
        line-height: 24px;
        margin-bottom: 10px;
    }

    .content .item>p {
        color: #666;
        font-size: 14px;
        line-height: 26px;
    }
}