关键：

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flex-shrink: 0;
white-space: nowrap;

示例：

Html

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<view class="padding-style">
  <view class='overflow-company-second'>
  <view class="special-list">
      <view class='active'>1</view>
      <view>2</view>
      <view>3</view>
      <view>4</view>
      <view>5</view>
      <view>6</view>
    </view>
  </view>
</view>

css

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.padding-style {
	padding: 0 28rpx;
}


.overflow-company-second {
	overflow: hidden;
	height: 88rpx;
	border-bottom: 1px solid #ccc;
}


.special-list {
	line-height: 88rpx;
	font-size: 30rpx;
	display: flex;
	overflow-x: auto;
	justify-content: space-between;
	padding-bottom: 40rpx;
}


.special-list>view {
	text-align: center;
	font-size: 30rpx;
	color: #283B42;
	font-weight: bold;
	flex-basis: 172rpx;
	flex-shrink: 0;
	white-space: nowrap;
}


.special-list>view.active {
	position: relative;
}


.special-list>view.active::before {
	content: "";
	display: block;
	clear: both;
	width: 120rpx;
	height: 6rpx;
	background-image: linear-gradient(90deg, #ea6f5a 58%, #eebeb6 100%);
	border-radius: 40rpx;
	position: absolute;
	left: 50%;
	bottom: 0;
	transform: translateX(-50%);
}

总结

display: flex flex布局
justify-content: space-between 位于首尾两端的子容器两端对齐
flex-basis: 172rpx 子容器基准大小 表示在不伸缩的情况下子容器的原始尺寸
flex-shrink: 0 收缩比例
white-space: nowrap 规定段落中的文本不进行换行
overflow-x: auto 横向溢出元素的内容区域添加滚动