* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    outline: none;
    -webkit-user-select: auto;
    /*用户是否可选择页面内容，若为none,输入框无法输入。*/
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    /*取消a标签touch高亮效果*/
    -webkit-text-size-adjust: none;
    /*禁止字体缩放*/
    font-family: "Arial", "Microsoft YaHei", "黑体", "宋体", sans-serif;
}

img {
    border: none;
    max-width: 100%;
    max-height: 100%;
}

body {
    background: #ffffff;
}

.intro-container {
    max-width: 750px;
    margin: 0 auto;
}

.banner img {
    width: 100%;
}

.intro-box {
    margin: 40px auto;
    padding: 0 20px;
}

.intro-box h4 {
    font-size: 18px;
    font-family: PingFangSC-Semibold, PingFang SC;
    font-weight: 600;
    color: rgba(36, 36, 36, 1);
    line-height: 40px;
}

.intro-box p {
    margin-top: 10px;
    font-size: 15px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: rgba(140, 140, 140, 1);
    line-height: 24px;
}

.intro-box .small-text {
    margin-top: 0px;
    font-size: 12px;
}

.img-box {
    margin: 20px 20px 40px;
    text-align: center;
}

.img-box img {
    width: 100%;
}

.logo-box {
    margin: 20px auto 60px;
}

.logo-box .logo-pic {
    text-align: center;
    padding: 10px 0;
}

.logo-box .logo-pic img {
    width: 90px;
}

.logo-box .text-logo {
    text-align: center;
    font-size: 22px;
    font-family: PingFangSC-Medium, PingFang SC;
    font-weight: 500;
    color: rgba(36, 36, 36, 1);
    line-height: 31px;
}