* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    color: #333;
    background: #fff;
    -webkit-font-smoothing: antialiased;
}

ul, ol {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s;
}

a:hover {
    color: #278de5;
}

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

input, button, textarea {
    font-family: inherit;
    font-size: inherit;
    outline: none;
    border: none;
}

button {
    cursor: pointer;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: normal;
}

.clearfix::after {
    content: "";
    display: block;
    clear: both;
}

.fl {
    float: left;
}

.fr {
    float: right;
}