html原生表格，实现左侧列固定

css类实现

tr:nth-child(even) {background-color: rgb(248, 247, 246);
}
tr:nth-child(odd) {background-color: #fff;
}
.dm_d1 {min-width: 0.2rem;position: sticky;left: 0;background: inherit;
}
.dm_d2 {width: 6vw;position: sticky;left: 2.25vw;background: inherit;
}
.dm_d3 {width: 3vw;position: sticky;left: 8.2vw;background: inherit;
}
.dm_d4 {width: 18vw;position: sticky;left: 11.2vw;background: inherit;
}
.dm_d5 {width: 4vw;position: sticky;left: 29.2vw;background: inherit;
}