手册

参考手册浏览器支持参考手册选择器参考手册组合器参考手册伪类参考手册伪元素参考手册函数参考手册动画相关属性网络安全字体字体回退单位颜色合法颜色值默认值参考手册实体听觉参考手册

CSS高级

accent-color align-content align-items align-self all animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function aspect-ratio backdrop-filter backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position background-position-x background-position-y background-repeat background-size block-size border border-block border-block-color border-block-end border-block-end-color border-block-end-style border-block-end-width border-block-start border-block-start-color border-block-start-style border-block-start-width border-block-style border-block-width border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-collapse border-color border-end-end-radius border-end-start-radius border-image border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-inline border-inline-color border-inline-end border-inline-end-color border-inline-end-style border-inline-end-width border-inline-start border-inline-start-color border-inline-start-style border-inline-start-width border-inline-style border-inline-width border-left border-left-color border-left-style border-left-width border-radius border-right border-right-color border-right-style border-right-width border-spacing border-start-end-radius border-start-start-radius border-style border-top border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-width bottom box-decoration-break box-reflect box-shadow box-sizing break-after break-before break-inside caption-side caret-color @charset 规则 clear clip clip-path color color-scheme column-count column-fill column-gap column-rule column-rule-color column-rule-style column-rule-width column-span column-width columns @container 规则 content counter-increment counter-reset counter-set @counter-style 规则 cursor direction display empty-cells filter flex flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap float font @font-face 规则 font-family font-feature-settings font-kerning @font-palette-values 规则 font-size font-size-adjust font-stretch font-style font-variant font-variant-caps font-weight gap grid grid-area grid-auto-columns grid-auto-flow grid-auto-rows grid-column grid-column-end grid-column-gap grid-column-start grid-gap grid-row grid-row-end grid-row-gap grid-row-start grid-template grid-template-areas grid-template-columns grid-template-rows hanging-punctuation height hyphens hyphenate-character image-rendering @import 规则 initial-letter inline-size inset inset-block inset-block-end inset-block-start inset-inline inset-inline-end inset-inline-start isolation justify-content justify-items justify-self @keyframes 规则 @layer 规则 left letter-spacing line-height list-style list-style-image list-style-position list-style-type margin margin-block margin-block-end margin-block-start margin-bottom margin-inline margin-inline-end margin-inline-start margin-left margin-right margin-top marker marker-end marker-mid marker-start mask mask-clip mask-composite mask-image mask-mode mask-origin mask-position mask-repeat mask-size mask-type max-block-size max-height max-inline-size max-width @media 规则 min-block-size min-inline-size min-height min-width mix-blend-mode @namespace 规则 object-fit object-position offset offset-anchor offset-distance offset-path offset-position offset-rotate opacity order orphans outline outline-color outline-offset outline-style outline-width overflow overflow-anchor overflow-wrap overflow-x overflow-y overscroll-behavior overscroll-behavior-block overscroll-behavior-inline overscroll-behavior-x overscroll-behavior-y padding padding-block padding-block-end padding-block-start padding-bottom padding-inline padding-inline-end padding-inline-start padding-left padding-top @page 规则 page-break-inside paint-order perspective perspective-origin place-content place-items place-self pointer-events position @property 规则 quotes resize right rotate row-gap scale @scope 规则 scroll-behavior scroll-margin scroll-margin-block scroll-margin-block-end scroll-margin-block-start scroll-margin-bottom scroll-margin-inline scroll-margin-inline-end scroll-margin-inline-start scroll-margin-left scroll-margin-right scroll-margin-top scroll-padding scroll-padding-block scroll-padding-block-end scroll-padding-block-start scroll-padding-bottom scroll-padding-inline scroll-padding-inline-end scroll-padding-inline-start scroll-padding-right scroll-padding-top scroll-snap-stop scroll-snap-type scrollbar-color shape-outside @starting-style 规则 @supports 规则 tab-size table-layout text-align text-align-last text-decoration text-decoration-color text-decoration-line text-decoration-style text-decoration-thickness text-emphasis text-emphasis-color text-emphasis-position text-emphasis-style text-indent text-justify text-orientation text-overflow text-shadow text-transform text-underline-offset text-underline-position top transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function translate unicode-bidi user-select vertical-align visibility white-space widows width word-break word-spacing word-wrap writing-mode z-index zoom

CSS中级教程

布局 - width 和 max-width 布局 - z-index 布局 - 溢出布局 - clear 和 clearfix 布局 - 浮动实例布局 - display: inline-block 垂直导航栏水平导航栏计数器网站布局特异性 !important 规则数学函数

CSS3高级教程

圆角边框图像多重背景颜色颜色关键字渐变径向渐变阴影效果 Box Shadow 文本效果 Web 字体 2D 转换 3D 转换过渡动画工具提示设置图像样式 object-fit object-position 遮罩按钮分页实例多列用户界面变量覆盖变量使用 JavaScript 更改变量在媒体查询中使用变量 @property 规则 Box Sizing Flexbox 媒体查询媒体查询 - 实例

CSS响应式设计

- 简介

CSS网格教程

网格容器网格项目

CSS实例

首页大前端 CSS CSS教程

边框各边

阅读1118

更新时间2025-07-16

边框颜色

简写边框属性

CSS 边框 - 单独的边

从上一章的例子中，您已经看到可以为每一侧指定不同的边框。

在 CSS 中，还有一些属性可用于指定每个边框（顶部、右侧、底部和左侧）：

实例

p {
  border-top-style: dotted;
  border-right-style: solid;
  border-bottom-style: dotted;
  border-left-style: solid;
}

结果：

不同的边框样式

运行实例 »

点击 "运行实例" 按钮查看在线实例

不同的边框样式

上例的结果与此相同：

实例

p {
  border-style: dotted solid;
}

运行实例 »

点击 "运行实例" 按钮查看在线实例

它的工作原理是这样的：

如果 border-style 属性设置四个值：

border-style: dotted solid double dashed;

上边框是虚线
右边框是实线
下边框是双线
左边框是虚线

如果 border-style 属性设置三个值：

border-style: dotted solid double;

上边框是虚线
右和左边框是实线
下边框是双线

如果 border-style 属性设置两个值：

border-style: dotted solid;

上和下边框是虚线
右和左边框是实线

如果 border-style 属性设置一个值：

border-style: dotted;

四条边均为虚线

实例

/* 四个值 */
p {
  border-style: dotted solid double dashed; 
}

/* 三个值 */
p {
  border-style: dotted solid double; 
}

/* 两个值 */
p {
  border-style: dotted solid; 
}

/* 一个值 */
p {
  border-style: dotted; 
}

运行实例 »

点击 "运行实例" 按钮查看在线实例

上例中使用的是 border-style 属性。但 border-width 和 border-color 也同样适用。

边框颜色

简写边框属性