@font-face {
    font-family: 'helvetica';
    src: url('helvetica-light-cn.woff2') format('woff2'), url('helvetica-light-cn.woff') format('woff');
    font-weight: 300;
    font-style: normal;
}

@font-face {
    font-family: 'helvetica';
    src: url('helvetica-cn.woff2') format('woff2'), url('helvetica-cn.woff') format('woff');
    font-weight: 400;
    font-style: normal;
}

@font-face {
    font-family: 'helvetica';
    src: url('helvetica-bold-cn.woff2') format('woff2'), url('helvetica-bold-cn.woff') format('woff');
    font-weight: 700;
    font-style: normal;
}

@font-face {
    font-family: 'helvetica';
    src: url('helvetica-heavy-cn.woff2') format('woff2'), url('helvetica-heavy-cn.woff') format('woff');
    font-weight: 900;
    font-style: normal;
}