---
id: 62015a5da1c95c358f079ebb
title: 步驟 37
challengeType: 0
dashedName: step-37
---
# --description--
`:first-of-type` 僞選擇器用於定位與選擇器匹配的第一個元素。 創建一個 `h1 .flex span:first-of-type` 選擇器，以定位 `.flex` 容器中的第一個 `span` 元素。 請記住，`span` 元素在視覺上是顛倒的，因此這看起來是頁面上的第二個元素。
給你的新選擇器一個 `0.7em` 的 `font-size` 屬性，使它看起來像一個子標題。
# --hints--
應該有一個 `h1 .flex span:first-of-type` 選擇器。
```js
assert(new __helpers.CSSHelp(document).getStyle('h1 .flex span:first-of-type'));
```
`h1 .flex span:first-of-type` 選擇器應該有一個 `font-size` 屬性設置爲 `0.7em`。
```js
assert(new __helpers.CSSHelp(document).getStyle('h1 .flex span:first-of-type')?.getPropertyValue('font-size') === '0.7em');
```
# --seed--
## --seed-contents--
```html
Balance Sheet
AcmeWidgetCorp
Balance Sheet
2019
2020
2021
Assets
|
2019 |
2020 |
2021 |
| Cash This is the cash we currently have on hand. |
$25 |
$30 |
$28 |
| Checking Our primary transactional account. |
$54 |
$56 |
$53 |
| Savings Funds set aside for emergencies. |
$500 |
$650 |
$728 |
| Total Assets |
$579 |
$736 |
$809 |
Liabilities
|
2019 |
2020 |
2021 |
| Loans The outstanding balance on our startup loan. |
$500 |
$250 |
$0 |
| Expenses Annual anticipated expenses, such as payroll. |
$200 |
$300 |
$400 |
| Credit The outstanding balance on our credit card. |
$50 |
$50 |
$75 |
| Total Liabilities |
$750 |
$600 |
$475 |
Net Worth
|
2019 |
2020 |
2021 |
| Total Net Worth |
$-171 |
$136 |
$334 |
```
```css
span[class~="sr-only"] {
border: 0;
clip: rect(1px, 1px, 1px, 1px);
clip-path: inset(50%);
-webkit-clip-path: inset(50%);
height: 1px;
width: 1px;
position: absolute;
overflow: hidden;
white-space: nowrap;
padding: 0;
margin: -1px;
}
html {
box-sizing: border-box;
}
body {
font-family: sans-serif;
color: #0a0a23;
}
h1 {
max-width: 37.25rem;
margin: 0 auto;
padding: 1.5rem 1.25rem;
}
h1 .flex {
display: flex;
flex-direction: column-reverse;
gap: 1rem;
}
--fcc-editable-region--
--fcc-editable-region--
```