為什么數字顯示不是在正中間?

.number-cell{
border-radius:?6px;
font-family:?Arial,?Helvetica,?sans-serif;
font-weight:?bold;
font-size:?60px;
height:?100px;
width:?100px;
text-align:?center;
position:?absolute;
}
.number-cell{
border-radius:?6px;
font-family:?Arial,?Helvetica,?sans-serif;
font-weight:?bold;
font-size:?60px;
height:?100px;
width:?100px;
text-align:?center;
position:?absolute;
}2018-03-19
舉報
2018-03-23
line-height = height = 100px,就自動居中了