逻辑边框属性详解

概述

本文档系统讲解逻辑边框属性详解中的各个属性。每个属性都配有来自 MDN 的可交互演示，可以直接点击运行查看效果。

Border-Block 块方向边框

border-block

逻辑属性：块方向边框的简写。

border-block 交互演示（MDN）

逻辑属性：块方向边框的简写。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-block 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（block 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #8b008b;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-block: solid;</button>
        <button class="snippet-btn" data-index="1">border-block: dashed red;</button>
        <button class="snippet-btn" data-index="2">border-block: 1rem solid;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-block: solid;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block: dashed red;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-block: 1rem solid;
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-block-color

逻辑属性：块方向边框的颜色。

border-block-color 交互演示（MDN）

逻辑属性：块方向边框的颜色。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-block-color 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（block-color 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #000;
        border: 0.75em solid;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-block-color: red;</button>
        <button class="snippet-btn" data-index="1">border-block-color: #32a1ce;</button>
        <button class="snippet-btn" data-index="2">border-block-color: rgb(170, 50, 220, 0.6);</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-block-color: red;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-color: #32a1ce;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-block-color: rgb(170, 50, 220, 0.6);
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-block-style

逻辑属性：块方向边框的样式。

border-block-style 交互演示（MDN）

逻辑属性：块方向边框的样式。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-block-style 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（block-style 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #000;
        border: 0.75em solid;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-block-style: dotted;</button>
        <button class="snippet-btn" data-index="1">border-block-style: dotted;</button>
        <button class="snippet-btn" data-index="2">border-block-style: groove;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-block-style: dotted;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-style: dotted;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-block-style: groove;
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-block-width

逻辑属性：块方向边框的宽度。

border-block-width 交互演示（MDN）

逻辑属性：块方向边框的宽度。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-block-width 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（block-width 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: palegreen;
        color: #000;
        border: 0 solid crimson;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-block-width: thick;</button>
        <button class="snippet-btn" data-index="1">border-block-width: thick;</button>
        <button class="snippet-btn" data-index="2">border-block-width: 4px;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-block-width: thick;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-width: thick;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-block-width: 4px;
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-block-start

逻辑属性：块起始方向边框的简写。

border-block-start 交互演示（MDN）

逻辑属性：块起始方向边框的简写。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-block-start 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（block-start 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #8b008b;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-block-start: solid;</button>
        <button class="snippet-btn" data-index="1">border-block-start: dashed red;</button>
        <button class="snippet-btn" data-index="2">border-block-start: 1rem solid;</button>
        <button class="snippet-btn" data-index="3">border-block-start: thick double #32a1ce;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-block-start: solid;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-start: dashed red;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-block-start: 1rem solid;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-start: thick double #32a1ce;
writing-mode: vertical-lr;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-block-start-color

逻辑属性：块起始方向边框的颜色。

border-block-start-color 交互演示（MDN）

逻辑属性：块起始方向边框的颜色。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-block-start-color 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（block-start-color 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #000;
        border: 0.75em solid;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-block-start-color: red;</button>
        <button class="snippet-btn" data-index="1">border-block-start-color: #32a1ce;</button>
        <button class="snippet-btn" data-index="2">border-block-start-color: rgb(170, 50, 220, 0.6);</button>
        <button class="snippet-btn" data-index="3">border-block-start-color: hsl(60, 90%, 50%, 0.8);</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-block-start-color: red;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-start-color: #32a1ce;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-block-start-color: rgb(170, 50, 220, 0.6);
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-start-color: hsl(60, 90%, 50%, 0.8);
writing-mode: vertical-lr;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-block-start-style

逻辑属性：块起始方向边框的样式。

border-block-start-style 交互演示（MDN）

逻辑属性：块起始方向边框的样式。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-block-start-style 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（block-start-style 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #000;
        border: 0.75em solid;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-block-start-style: dotted;</button>
        <button class="snippet-btn" data-index="1">border-block-start-style: dotted;</button>
        <button class="snippet-btn" data-index="2">border-block-start-style: groove;</button>
        <button class="snippet-btn" data-index="3">border-block-start-style: dashed;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-block-start-style: dotted;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-start-style: dotted;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-block-start-style: groove;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-start-style: dashed;
writing-mode: vertical-lr;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-block-start-width

逻辑属性：块起始方向边框的宽度。

border-block-start-width 交互演示（MDN）

逻辑属性：块起始方向边框的宽度。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-block-start-width 属性演示 - MDN 示例</title>
    <meta name="description" content="演示border（block-start-width 属性演示）效果。" />
    <style>
      * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
          }
          body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            min-height: 100vh;
            padding: 0;
          }
          .demo-layout {
            display: flex;
            height: 100vh;
            gap: 0;
          }
          .snippet-panel {
            width: 320px;
            flex-shrink: 0;
            padding: 16px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
            border-right: 1px solid #ddd;
            background: #fafafa;
          }
          .snippet-btn {
            padding: 10px 14px;
            border: 1px solid #ccc;
            border-radius: 6px;
            background: #fff;
            font-family: 'JetBrains Mono', 'Fira Code', monospace;
            font-size: 13px;
            color: #333;
            cursor: pointer;
            text-align: left;
            transition: all 0.2s;
            line-height: 1.4;
          }
          .snippet-btn:hover {
            border-color: #8083ff;
            background: #f0f0ff;
          }
          .snippet-btn.active {
            border-color: #8083ff;
            background: #e8e8ff;
            color: #571bc1;
            font-weight: 600;
          }
          .preview-panel {
            flex: 1;
            padding: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #fff;
            overflow: auto;
          }
          .preview-panel > section,
          .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
            flex: 1;
            width: 100%;
            min-height: 0;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
          }
      :root {
        --link-color: 0;
        --secondary-button-fill-color: 0;
        --secondary-button-border-color: 0;
        --secondary-button-text-color: 0;
        --background-color: 0;
        --google-gray-800: 0;
        --google-gray-100: 0;
        --google-blue-300: 0;
        --primary-button-text-color: 0;
        --primary-button-fill-color: 0;
        --primary-button-fill-color-active: 0;
        --secondary-button-hover-fill-color: 0;
        --secondary-button-hover-border-color: 0;
        --error-code-color: 0;
        --heading-color: 0;
        --google-red-10: 0;
        --small-link-color: 0;
        --google-blue-600: 0;
        --google-gray-300: 0;
        --google-gray-700: 0;
        --text-color: 0;
        --google-gray-50: 0;
      }

      /* Copyright 2017 The Chromium Authors * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ a {
        color: var(--link-color);
        text-decoration: none
      }

      .nav-wrapper .secondary-button {
        background: var(--secondary-button-fill-color);
        border: 1px solid var(--secondary-button-border-color);
        color: var(--secondary-button-text-color);
        float: none;
        margin: 0;
        padding: 8px 16px
      }

      .hidden {
        display: none
      }

      .icon {
        background-repeat: no-repeat;
        background-size: 100%;
        height: 72px;
        margin: 0 0 40px;
        width: 72px;
        -webkit-user-select: none;
        display: inline-block
      }

      @media (prefers-color-scheme: dark) {
        ;
        .icon {
        filter: {
        .icon filter: invert(1);
      .offline .runner-canvas {
        filter: invert(1)
      }

      .offline.inverted {
        background-color: var(--background-color)
      }

      filter: invert(0);
        .offline.inverted .offline.inverted .offline-runner-live-region color: #fff;
        #suggestions-list a color: var(--link-color);
        .slow-speed-option {
        background: var(--google-gray-800)
      }

      color: var(--google-gray-100);
        .slow-speed-option .slow-speed-toggle::before, .slow-speed-option [type=checkbox]:checked:disabled + .slow-speed-toggle::before background: rgb(189,193,198);
        .slow-speed-option [type=checkbox]: checked + .slow-speed-toggle::after, .slow-speed-option [type=checkbox]:checked + .slow-speed-toggle::before {
        background: var(--google-blue-300)
      }

      }

      button {
        border: 0;
        border-radius: 20px;
        box-sizing: border-box;
        color: var(--primary-button-text-color);
        cursor: pointer;
        float: right;
        font-size: .875em;
        margin: 0;
        padding: 8px 16px;
        transition: box-shadow 150ms cubic-bezier(0.4, 0, 0.2, 1);
        user-select: none
      }

      [dir='rtl'] button {
        float: left
      }

      .bad-clock button, .captive-portal button, .https-only button, .insecure-form button, .lookalike-url button, .main-frame-blocked button, .neterror button, .pdf button, .ssl button, .enterprise-block button, .enterprise-warn button, .managed-profile-required button, .safe-browsing-billing button, .supervised-user-verify button, .supervised-user-verify-subframe button {
        background: var(--primary-button-fill-color)
      }

      button:active {
        background: var(--primary-button-fill-color-active);
        outline: 0
      }

      #debugging {
        display: inline;
        overflow: auto
      }

      .debugging-content {
        line-height: 1em;
        margin-bottom: 0;
        margin-top: 1em
      }

      .debugging-content-fixed-width {
        display: block;
        font-family: monospace;
        font-size: 1.2em;
        margin-top: 0.5em
      }

      .debugging-title {
        font-weight: bold
      }

      #details {
        margin: 0 0 50px
      }

      #details {
        p:not(:first-of-type) {
        margin-top: 20px
      }

      }

      .secondary-button:active {
        border-color: white;
        box-shadow: 0 1px 2px 0 rgba(60, 64, 67, .3), 0 2px 6px 2px rgba(60, 64, 67, .15)
      }

      .secondary-button:hover {
        background: var(--secondary-button-hover-fill-color);
        border-color: var(--secondary-button-hover-border-color);
        text-decoration: none
      }

      .error-code {
        color: var(--error-code-color);
        font-size: .8em;
        margin-top: 12px;
        text-transform: uppercase
      }

      #error-debugging-info {
        font-size: 0.8em
      }

      h1 {
        color: var(--heading-color);
        font-size: 1.6em;
        font-weight: normal;
        line-height: 1.25em;
        margin-bottom: 16px;
        margin-top: 0;
        word-wrap: break-word
      }

      h2 {
        font-size: 1.2em;
        font-weight: normal
      }

      input[type=checkbox] {
        opacity: 0
      }

      input[type=checkbox]:focus ~ .checkbox::after {
        outline: -webkit-focus-ring-color auto 5px
      }

      .interstitial-wrapper {
        box-sizing: border-box;
        font-size: 1em;
        line-height: 1.6em;
        margin: 14vh auto 0;
        max-width: 600px;
        width: 100%
      }

      #main-message > p {
        display: inline
      }

      #extended-reporting-opt-in {
        font-size: .875em;
        margin-top: 32px
      }

      #extended-reporting-opt-in label {
        display: grid;
        grid-template-columns: 1.8em 1fr;
        position: relative
      }

      #enhanced-protection-message {
        border-radius: 20px;
        font-size: 1em;
        margin-top: 32px;
        padding: 10px 5px
      }

      #enhanced-protection-message a {
        color: var(--google-red-10)
      }

      #enhanced-protection-message label {
        display: grid;
        grid-template-columns: 2.5em 1fr;
        position: relative
      }

      #enhanced-protection-message div {
        margin: 0.5em
      }

      #enhanced-protection-message .icon {
        height: 1.5em;
        vertical-align: middle;
        width: 1.5em
      }

      .nav-wrapper {
        margin-top: 51px
      }

      .nav-wrapper::after {
        clear: both;
        content: '';
        display: table;
        width: 100%
      }

      .small-link {
        color: var(--small-link-color);
        font-size: .875em
      }

      .checkboxes {
        flex: 0 0 24px
      }

      .checkbox {
        --padding: .9em;
        background: transparent;
        display: block;
        height: 1em;
        left: -1em;
        padding-inline-start: var(--padding);
        position: absolute;
        right: 0;
        top: -.5em;
        width: 1em
      }

      .checkbox::after {
        border: 1px solid white;
        border-radius: 2px;
        content: '';
        height: 1em;
        left: var(--padding);
        position: absolute;
        top: var(--padding);
        width: 1em
      }

      .checkbox::before {
        background: transparent;
        border: 2px solid white;
        border-inline-end-width: 0;
        border-top-width: 0;
        content: '';
        height: .2em;
        left: calc(.3em + var(--padding));
        opacity: 0;
        position: absolute;
        top: calc(.3em + var(--padding));
        transform: rotate(-45deg);
        width: .5em
      }

      input[type=checkbox]:checked ~ .checkbox::before {
        opacity: 1
      }

      @media (max-width: 700px) {
        .inters {
        .interstitial-wrapper padding: 0 10%;
        #error-debugging-info {
        overflow: auto
      }

      }

      @media (max-width: 420px) {
        button, [dir='rtl'] {
        button, [dir='rtl'] button, .small-link float: none;
        font-size: .825em;
        font-weight: 500;
        margin: 0;
        width: 100%;
      button {
        padding: 16px 24px
      }

      #details {
        margin: 20px 0 20px 0
      }

      #details {
        p: not(:first-of-type) margin-top: 10px
      }

      .secondary-button: not(.hidden) {
        display: block
      }

      margin-top: 20px;
        text-align: center;
        width: 100%;
        .interstitial-wrapper {
        padding: 0 5%
      }

      #extended-reporting-opt-in {
        margin-top: 24px
      }

      #enhanced-protection-message {
        margin-top: 24px
      }

      .nav-wrapper {
        margin-top: 30px
      }

      #download {
        #download-button padding-bottom: 12px;
        padding-top: 12px;
        .suggested-left > #control-buttons, .suggested-right > #control-buttons float: none;
        .snackbar {
        border-radius: 0
      }

      bottom: 0;
        left: 0;
        width: 100%
      }

      /** * Mobile specific styling. * Navigation buttons are anchored to the bottom of the screen. * Details message replaces the top content in its own scrollable area. */ @media (max-width: 420px) {
        .nav- {
        .nav-wrapper .secondary-button border: 0;
        margin: 16px 0 0;
        margin-inline-end: 0;
        padding-bottom: 16px;
        padding-top: 16px
      }

      @media (min-width: 240px) and (max-width: 420px) and (min-height: 401px), (min-width: 421px) and (min-height: 240px) and (max-height: 560px) {
        body .nav-wra {
        body .nav-wrapper background: var(--background-color);
        bottom: 0;
        box-shadow: 0 -12px 24px var(--background-color);
        left: 0;
        margin: 0 auto;
        max-width: 736px;
        padding-inline-end: 24px;
        padding-inline-start: 24px;
        position: fixed;
        right: 0;
        width: 100%;
        z-index: 2;
        .interstitial-wrapper {
        max-width: 736px
      }

      #details, #main-content padding-bottom: 40px;
        #details {
        padding-top: 5.5vh
      }

      button.small-link color: var(--google-blue-600)
      }

      @media (max-width: 420px) and (orientation: portrait), (max-height: 560px) {
        button, [dir='rtl'] but {
        button, [dir='rtl'] button, button.small-link, .nav-wrapper .secondary-button font-family: Roboto-Regular,Helvetica;
        font-size: .933em;
        margin: 6px 0;
        transform: translatez(0);
        .nav-wrapper {
        box-sizing: border-box
      }

      padding-bottom: 8px;
        width: 100%;
        #details {
        box-sizing: border-box
      }

      height: auto;
        margin: 0;
        opacity: 1;
        transition: opacity 250ms cubic-bezier(0.4, 0, 0.2, 1);
        #details.hidden, #main-content.hidden height: 0;
        opacity: 0;
        overflow: hidden;
        padding-bottom: 0;
        transition: none;
      h1 {
        font-size: 1.5em
      }

      margin-bottom: 8px;
        .icon {
        margin-bottom: 5.69vh
      }

      .interstitial-wrapper {
        box-sizing: border-box
      }

      margin: 7vh auto 12px;
        padding: 0 24px;
        position: relative;
        .interstitial-wrapper p font-size: .95em;
        line-height: 1.61em;
        margin-top: 8px;
        #main-content {
        margin: 0
      }

      transition: opacity 100ms cubic-bezier(0.4, 0, 0.2, 1);
        .small-link {
        border: 0
      }

      .suggested-left > #control-buttons, .suggested-right > #control-buttons float: none;
        margin: 0
      }

      @media (min-width: 421px) and (min-height: 500px) and (max-height: 560px) {
        .inte {
        .interstitial-wrapper margin-top: 10vh
      }

      @media (min-height: 400px) and (orientation: portrait) {
        .inte {
        .interstitial-wrapper margin-bottom: 145px
      }

      @media (min-height: 299px) {
        .nav- {
        .nav-wrapper padding-bottom: 16px
      }

      @media (max-height: 560px) and (min-height: 240px) and (orientation: landscape) {
        .exte {
        .extended-reporting-has-checkbox #details padding-bottom: 80px
      }

      @media (min-height: 500px) and (max-height: 650px) and (max-width: 414px) and (orientation: portrait) {
        .inte {
        .interstitial-wrapper margin-top: 7vh
      }

      @media (min-height: 650px) and (max-width: 414px) and (orientation: portrait) {
        .inte {
        .interstitial-wrapper margin-top: 10vh
      }

      @media (max-height: 400px) and (orientation: portrait), (max-height: 239px) and (orientation: landscape), (max-width: 419px) and (max-height: 399px) {
        .interstitial-w {
        .interstitial-wrapper display: flex;
        flex-direction: column;
        margin-bottom: 0;
        #details {
        flex: 1 1 auto
      }

      order: 0;
        #main-content {
        flex: 1 1 auto
      }

      order: 0;
        .nav-wrapper {
        flex: 0 1 auto
      }

      margin-top: 8px;
        order: 1;
        padding-inline-end: 0;
        padding-inline-start: 0;
        position: relative;
        width: 100%;
        button, .nav-wrapper .secondary-button padding: 16px 24px;
        button.small-link color: var(--google-blue-600)
      }

      @media (max-width: 239px) and (orientation: portrait) {
        .nav- {
        .nav-wrapper padding-inline-end: 0;
        padding-inline-start: 0
      }

      /* Copyright 2013 The Chromium Authors * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ html[subframe] #main-frame-error {
        display: none
      }

      html:not([subframe]) #sub-frame-error {
        display: none
      }

      h1 span {
        font-weight: 500
      }

      .icon-generic {
        content: image-set( url(data:image/png;
        base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABIAQMAAABvIyEEAAAABlBMVEUAAABTU1OoaSf/AAAAAXRSTlMAQObYZgAAAENJREFUeF7tzbEJACEQRNGBLeAasBCza2lLEGx0CxFGG9hBMDDxRy/72O9FMnIFapGylsu1fgoBdkXfUHLrQgdfrlJN1BdYBjQQm3UAAAAASUVORK5CYII=) 1x, url(data: image/png;
        base64,iVBORw0KGgoAAAANSUhEUgAAAJAAAACQAQMAAADdiHD7AAAABlBMVEUAAABTU1OoaSf/AAAAAXRSTlMAQObYZgAAAFJJREFUeF7t0cENgDAMQ9FwYgxG6WjpaIzCCAxQxVggFuDiCvlLOeRdHR9yzjncHVoq3npu+wQUrUuJHylSTmBaespJyJQoObUeyxDQb3bEm5Au81c0pSCD8HYAAAAASUVORK5CYII=) 2x)
      }

      .icon-info {
        content: image-set( url(data:image/png;
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      #suggestions-list p {
        margin-block-end: 0
      }

      #suggestions-list ul {
        margin-top: 0
      }

      .single-suggestion {
        list-style-type: none;
        padding-inline-start: 0
      }

      .link-button {
        color: rgb(66, 133, 244);
        display: inline-block;
        font-weight: bold;
        text-transform: uppercase
      }

      #sub-frame-error-details {
        c {
        color: #8F8F8F;
        text-shadow: 0 1px 0 rgba(255,255,255,0.3); {
        margin: 0 10px;
        text-align: center;
        opacity: 0
      }

      .secondary-button {
        background: #d9d9d9;
        color: #696969;
        margin-inline-end: 16px
      }

      .snackbar {
        background: #323232;
        border-radius: 2px;
        bottom: 24px;
        box-sizing: border-box;
        color: #fff;
        font-size: .87em;
        left: 24px;
        max-width: 568px;
        min-width: 288px;
        opacity: 0;
        padding: 16px 24px 12px;
        position: fixed;
        transform: translateY(90px);
        will-change: opacity, transform;
        z-index: 999
      }

      .snackbar-show {
        -webkit-animation: show-snackbar 250ms cubic-bezier(0, 0, 0.2, 1) forwards, hide-snackbar 250ms cubic-bezier(0.4, 0, 1, 1) forwards 5s
      }

      @-webkit-keyframes show-snackbar {
        100% {
        100% opacity: 1;
        transform: translateY(0)
      }

      @-webkit-keyframes hide-snackbar {
        0% {
        0% opacity: 1;
        transform: translateY(0);
        100% {
        opacity: 0
      }

      transform: translateY(90px)
      }

      .suggestions {
        margin-top: 18px
      }

      .suggestion-header {
        font-weight: bold;
        margin-bottom: 4px
      }

      .suggestion- @media (max-width: 640px), (max-height: 640px) {
        h1 {
        h1 margin: 0 0 15px;
        .suggestions {
        margin-top: 10px
      }

      .suggestion-header {
        margin-bottom: 0
      }

      }

      #cancel-save-page-button {
        background-image: url(data:image/svg+xml;
        base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgd2lkdGg9IjI0IiBoZWlnaHQ9IjI0Ij48Y2xpcFBhdGggaWQ9Im1hc2siPjxwYXRoIGQ9Ik0xMiAyQzYuNSAyIDIgNi41IDIgMTJzNC41IDEwIDEwIDEwIDEwLTQuNSAxMC0xMFMxNy41IDIgMTIgMnptNSAxNkg3di0yaDEwdjJ6bS02LjctNEw3IDEwLjdsMS40LTEuNCAxLjkgMS45IDUuMy01LjNMMTcgNy4zIDEwLjMgMTR6IiBmaWxsPSIjOUFBMEE2Ii8+PC9jbGlwUGF0aD48cGF0aCBjbGlwLXBhdGg9InVybCgjbWFzaykiIGZpbGw9IiM5QUEwQTYiIGQ9Ik0wIDBoMjR2MjRIMHoiLz48cGF0aCBjbGlwLXBhdGg9InVybCgjbWFzaykiIGZpbGw9IiMxQTczRTgiIHN0eWxlPSJhbmltYXRpb246b2ZmbGluZUFuaW1hdGlvbiA0cyBpbmZpbml0ZSIgZD0iTTAgMGgyNHYyNEgweiIvPjxzdHlsZT5Aa2V5ZnJhbWVzIG9mZmxpbmVBbmltYXRpb257MCUsMzUle2hlaWdodDowfTYwJXtoZWlnaHQ6MTAwJX05MCV7ZmlsbC1vcGFjaXR5OjF9dG97ZmlsbC1vcGFjaXR5OjB9fTwvc3R5bGU+PC9zdmc+);
        background-position: right 27px center;
        background-repeat: no-repeat;
        border: 1px solid var(--google-gray-300);
        border-radius: 5px;
        color: var(--google-gray-700);
        margin-bottom: 26px;
        padding-bottom: 16px;
        padding-inline-end: 88px;
        padding-inline-start: 16px;
        padding-top: 16px;
        text-align: start
      }

      html[dir='rtl'] #cancel-save-page-button {
        background-position: left 27px center
      }

      #save-page-for-later-button {
        display: flex;
        justify-content: start
      }

      #save-page-for-later-button {
        a::before {
        content: url(data:image/svg+xml
      }

      base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxLjJlbSIgaGVpZ2h0PSIxLjJlbSIgdmlld0JveD0iMCAwIDI0IDI0Ij48cGF0aCBkPSJNNSAyMGgxNHYtMkg1bTE0LTloLTRWM0g5djZINWw3IDcgNy03eiIgZmlsbD0iIzQyODVGNCIvPjwvc3ZnPg==);
        display: inline-block;
        margin-inline-end: 4px;
        vertical-align: -webkit-baseline-middle
      }

      .hidden#save-page-for-later-button {
        display: none
      }

      html[subframe] #sub-frame-error {
        -webkit-align-items: center;
        -webkit-flex-flow: column;
        -webkit-justify-content: center;
        background-color: #DDD;

        height: 100%;
        left: 0;
        position: absolute;
        text-align: center;
        top: 0;
        transition: background-color 200ms ease-in-out;
        width: 100%
      }

      #sub-frame-error:hover {
        background-color: #EEE
      }

      #sub-frame-error .icon-generic {
        margin: 0 0 16px
      }

      #sub-frame-error:hover #sub-frame-error-details {
        opacity: 1
      }

      @media (max-width: 200px), (max-height: 95px) {
        #sub- {
        #sub-frame-error-details display: none
      }

      @media (max-height: 100px) {
        #sub- {
        #sub-frame-error .icon-generic height: auto;
        margin: 0;
        padding-top: 0;
        width: 25px
      }

      #details-button {
        box-shadow: none;
        min-width: 0
      }

      .suggested-left > #control-buttons, .suggested-right > #details-button {
        float: left
      }

      .suggested-right > #control-buttons, .suggested-left > #details-button {
        float: right
      }

      .suggested-left .secondary-button {
        margin-inline-end: 0;
        margin-inline-start: 16px
      }

      #details-button.singular {
        float: none
      }

      #download-button {
        padding-bottom: 4px;
        padding-top: 4px;
        position: relative
      }

      #download-button::before {
        background: image-set( url(data:image/png;
        base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAQAAABKfvVzAAAAO0lEQVQ4y2NgGArgPxIY1YChsOE/LtBAmpYG0mxpIOSDBpKUo2lpIDZxNJCkHKqlYZAla3RAHQ1DFgAARRroHyLNTwwAAAAASUVORK5CYII=) 1x, url(data: image/png;
        base64,iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAQAAAD9CzEMAAAAZElEQVRYw+3Ruw3AMAwDUY3OzZUmRRD4E9iim9wNwAdbEURHyk4AAAAATiCVK8lLyPsKeT9K3lsownnunfkPxO78hKiYHxBV8x2icr5BVM+/CMf8g3DN34Rzns6ViwHUAUQ/6wIAd5Km7l6c8AAAAABJRU5ErkJggg==) 2x) no-repeat;
        content: '';
        display: inline-block;
        height: 24px;
        margin-inline-end: 4px;
        margin-inline-start: -4px;
        vertical-align: middle;
        width: 24px
      }

      #download-button:disabled {
        background: rgb(180, 206, 249);
        color: rgb(255, 255, 255)
      }

      #buttons::after {
        clear: both;
        content: '';
        display: block;
        width: 100%
      }

      html[dir='rtl'] .runner-container, html[dir='rtl'].offline .icon-offline {
        transform: scaleX(-1)
      }

      .offline {
        t {
        transition: filter 1.5s cubic-bezier(0.65, 0.05, 0.36, 1), background-color 1.5s cubic-bezier(0.65, 0.05, 0.36, 1);
        will-change: filter, background-color
      }

      .offline .offline #main-message > p {
        display: none
      }

      .offline.inverted {
        background-color: #fff;
        filter: invert(1)
      }

      .offline.inverted .offline .interstitial-wrapper {
        color: var(--text-color);
        font-size: 1em;
        line-height: 1.55;
        margin: 0 auto;
        max-width: 600px;
        padding-top: 100px;
        position: relative;
        width: 100%
      }

      .offline .runner-container {
        direction: ltr;
        height: 150px;
        max-width: 600px;
        overflow: hidden;
        position: absolute;
        top: 35px;
        width: 44px
      }

      .offline .runner-container:focus {
        outline: none
      }

      .offline .runner-container:focus-visible {
        outline: 3px solid var(--google-blue-300)
      }

      .offline .runner-canvas {
        height: 150px;
        max-width: 600px;
        opacity: 1;
        overflow: hidden;
        position: absolute;
        top: 0;
        z-index: 10
      }

      .offline .controller {
        height: 100vh;
        left: 0;
        position: absolute;
        top: 0;
        width: 100vw;
        z-index: 9
      }

      #offline-resources {
        display: none
      }

      #offline-instruction {
        image-rendering: pixelated;
        left: 0;
        margin: auto;
        position: absolute;
        right: 0;
        top: 60px;
        width: fit-content
      }

      .offline-runner-live-region {
        bottom: 0;
        clip-path: polygon(0 0, 0 0, 0 0);
        color: var(--background-color);
        display: block;
        font-size: xx-small;
        overflow: hidden;
        position: absolute;
        text-align: center;
        transition: color 1.5s cubic-bezier(0.65, 0.05, 0.36, 1);
        user-select: none
      }

      .slow-speed-option {
        align-items: center;
        background: var(--google-gray-50);
        border-radius: 24px/50%;
        bottom: 0;
        color: var(--error-code-color);
        display: inline-flex;
        font-size: 1em;
        left: 0;
        line-height: 1.1em;
        margin: 5px auto;
        padding: 2px 12px 3px 20px;
        position: absolute;
        right: 0;
        width: max-content;
        z-index: 999
      }

      .slow-speed-option.hidden {
        display: none
      }

      .slow-speed-option [type=checkbox] {
        opacity: 0;
        pointer-events: none;
        position: absolute
      }

      .slow-speed-option .slow-speed-toggle {
        cursor: pointer;
        margin-inline-start: 8px;
        padding: 8px 4px;
        position: relative
      }

      .slow-speed-option [type=checkbox]:disabled ~ .slow-speed-toggle {
        cursor: default
      }

      .slow-speed-option-label [type=checkbox] {
        opacity: 0;
        pointer-events: none;
        position: absolute
      }

      .slow-speed-option .slow-speed-toggle::before, .slow-speed-option .slow-speed-toggle::after {
        content: '';
        display: block;
        margin: 0 3px;
        transition: all 100ms cubic-bezier(0.4, 0, 1, 1)
      }

      .slow-speed-option .slow-speed-toggle::before {
        background: rgb(189,193,198);
        border-radius: 0.65em;
        height: 0.9em;
        width: 2em
      }

      .slow-speed-option .slow-speed-toggle::after {
        background: #fff;
        border-radius: 50%;
        box-shadow: 0 1px 3px 0 rgb(0 0 0 / 40%);
        height: 1.2em;
        position: absolute;
        top: 51%;
        transform: translate(-20%, -50%);
        width: 1.1em
      }

      .slow-speed-option [type=checkbox]:focus + .slow-speed-toggle {
        box-shadow: 0 0 8px rgb(94, 158, 214);
        outline: 1px solid rgb(93, 157, 213)
      }

      .slow-speed-option [type=checkbox]:checked + .slow-speed-toggle::before {
        background: var(--google-blue-600);
        opacity: 0.5
      }

      .slow-speed-option [type=checkbox]:checked + .slow-speed-toggle::after {
        background: var(--google-blue-600);
        transform: translate(calc(2em - 90%), -50%)
      }

      .slow-speed-option [type=checkbox]:checked:disabled + .slow-speed-toggle::before {
        background: rgb(189,193,198)
      }

      .slow-speed-option [type=checkbox]:checked:disabled + .slow-speed-toggle::after {
        background: var(--google-gray-50)
      }

      @media (max-height: 350px) {
        h1 {
        ma {
        h1 margin: 0 0 15px;
        .icon-offline {
        margin: 0 0 10px
      }

      .interstitial-wrapper {
        margin-top: 5%
      }

      .nav-wrapper {
        margin-top: 30px
      }

      }

      @media (min-width: 420px) and (max-width: 736px) and (min-height: 240px) and (max-height: 420px) and (orientation:landscape) {
        .inte {
        .interstitial-wrapper margin-bottom: 100px
      }

      @media (max-width: 360px) and (max-height: 480px) {
        .offlin {
        .offline .interstitial-wrapper padding-top: 60px;
      .offline .runner-container {
        top: 8px
      }

      }

      @media (min-height: 240px) and (orientation: landscape) {
        .offlin {
        .offline .interstitial-wrapper margin-bottom: 90px;
        .icon-offline {
        margin-bottom: 20px
      }

      }

      @media (max-height: 320px) and (orientation: landscape) {
        .icon-o {
        .icon-offline margin-bottom: 0;
      .offline .runner-container {
        top: 10px
      }

      }

      @media (max-width: 240px) {
        button {
        button padding-inline-end: 12px;
        padding-inline-start: 12px;
        .interstitial-wrapper {
        overflow: inherit
      }

      padding: 0 8px
      }

      @media (max-width: 120px) {
        butto {
        button width: auto
      }

      .arcade-mode, .arcade-mode .runner-container, .arcade-mode .runner-canvas {
        image-rendering: pixelated;
        max-width: 100%;
        overflow: hidden
      }

      .arcade-mode #buttons, .arcade-mode #main-content {
        opacity: 0;
        overflow: hidden
      }

      .arcade-mode .interstitial-wrapper {
        height: 100vh;
        max-width: 100%;
        overflow: hidden
      }

      .arcade-mode .runner-container {
        left: 0;
        margin: auto;
        right: 0;
        transform-origin: top center;
        transition: transform 250ms cubic-bezier(0.4, 0, 1, 1) 400ms;
        z-index: 2
      }

      #main-frame-error:not(.showing-details) #details {
        display: none
      }

      @media (min-width: 240px) and (max-width: 420px) and (min-height: 401px), (min-height: 240px) and (max-height: 560px) and (min-width: 421px) {
        #main {
        #main-frame-error.showing-details #main-content, #main-frame-error.showing-details .runner-container display: none
      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }

      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-block-start-width: thick;</button>
        <button class="snippet-btn" data-index="1">border-block-start-width: thick;</button>
        <button class="snippet-btn" data-index="2">border-block-start-width: 4px;</button>
        <button class="snippet-btn" data-index="3">border-block-start-width: 4px;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-block-start-width: thick;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-start-width: thick;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-block-start-width: 4px;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-start-width: 4px;
writing-mode: vertical-lr;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-block-end

逻辑属性：块结束方向边框的简写。

border-block-end 交互演示（MDN）

逻辑属性：块结束方向边框的简写。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-block-end 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（block-end 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #8b008b;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-block-end: solid;</button>
        <button class="snippet-btn" data-index="1">border-block-end: dashed red;</button>
        <button class="snippet-btn" data-index="2">border-block-end: 1rem solid;</button>
        <button class="snippet-btn" data-index="3">border-block-end: thick double #32a1ce;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-block-end: solid;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-end: dashed red;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-block-end: 1rem solid;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-end: thick double #32a1ce;
writing-mode: vertical-lr;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-block-end-color

逻辑属性：块结束方向边框的颜色。

border-block-end-color 交互演示（MDN）

逻辑属性：块结束方向边框的颜色。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-block-end-color 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（block-end-color 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #000;
        border: 0.75em solid;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-block-end-color: red;</button>
        <button class="snippet-btn" data-index="1">border-block-end-color: #32a1ce;</button>
        <button class="snippet-btn" data-index="2">border-block-end-color: rgb(170, 50, 220, 0.6);</button>
        <button class="snippet-btn" data-index="3">border-block-end-color: hsl(60, 90%, 50%, 0.8);</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-block-end-color: red;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-end-color: #32a1ce;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-block-end-color: rgb(170, 50, 220, 0.6);
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-end-color: hsl(60, 90%, 50%, 0.8);
writing-mode: vertical-lr;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-block-end-style

逻辑属性：块结束方向边框的样式。

border-block-end-style 交互演示（MDN）

逻辑属性：块结束方向边框的样式。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-block-end-style 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（block-end-style 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #000;
        border: 0.75em solid;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-block-end-style: dotted;</button>
        <button class="snippet-btn" data-index="1">border-block-end-style: dotted;</button>
        <button class="snippet-btn" data-index="2">border-block-end-style: groove;</button>
        <button class="snippet-btn" data-index="3">border-block-end-style: dashed;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-block-end-style: dotted;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-end-style: dotted;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-block-end-style: groove;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-end-style: dashed;
writing-mode: vertical-lr;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-block-end-width

逻辑属性：块结束方向边框的宽度。

border-block-end-width 交互演示（MDN）

逻辑属性：块结束方向边框的宽度。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-block-end-width 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（block-end-width 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: palegreen;
        color: #000;
        border: 0 solid crimson;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-block-end-width: thick;</button>
        <button class="snippet-btn" data-index="1">border-block-end-width: thick;</button>
        <button class="snippet-btn" data-index="2">border-block-end-width: 4px;</button>
        <button class="snippet-btn" data-index="3">border-block-end-width: 4px;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-block-end-width: thick;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-end-width: thick;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-block-end-width: 4px;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-block-end-width: 4px;
writing-mode: vertical-lr;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

Border-Inline 行方向边框

border-inline

逻辑属性：行方向边框的简写。

border-inline 交互演示（MDN）

逻辑属性：行方向边框的简写。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-inline 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（inline 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #8b008b;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-inline: solid;</button>
        <button class="snippet-btn" data-index="1">border-inline: dashed red;</button>
        <button class="snippet-btn" data-index="2">border-inline: 1rem solid;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-inline: solid;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-inline: dashed red;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-inline: 1rem solid;
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-inline-color

逻辑属性：行方向边框的颜色。

border-inline-color 交互演示（MDN）

逻辑属性：行方向边框的颜色。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-inline-color 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（inline-color 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #000;
        border: 0.75em solid;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-inline-color: red;</button>
        <button class="snippet-btn" data-index="1">border-inline-color: #32a1ce;</button>
        <button class="snippet-btn" data-index="2">border-inline-color: rgb(170, 50, 220, 0.6);</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-inline-color: red;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-inline-color: #32a1ce;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-inline-color: rgb(170, 50, 220, 0.6);
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-inline-style

逻辑属性：行方向边框的样式。

border-inline-style 交互演示（MDN）

逻辑属性：行方向边框的样式。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-inline-style 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（inline-style 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #000;
        border: 0.75em solid;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-inline-style: dotted;</button>
        <button class="snippet-btn" data-index="1">border-inline-style: dotted;</button>
        <button class="snippet-btn" data-index="2">border-inline-style: groove;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-inline-style: dotted;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-inline-style: dotted;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-inline-style: groove;
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-inline-width

逻辑属性：行方向边框的宽度。

border-inline-width 交互演示（MDN）

逻辑属性：行方向边框的宽度。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-inline-width 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（inline-width 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: palegreen;
        color: #000;
        border: 0 solid crimson;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-inline-width: thick;</button>
        <button class="snippet-btn" data-index="1">border-inline-width: thick;</button>
        <button class="snippet-btn" data-index="2">border-inline-width: 4px;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-inline-width: thick;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-inline-width: thick;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-inline-width: 4px;
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-inline-start

逻辑属性：行起始方向边框的简写。

border-inline-start 交互演示（MDN）

逻辑属性：行起始方向边框的简写。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-inline-start 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（inline-start 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #8b008b;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-inline-start: solid;</button>
        <button class="snippet-btn" data-index="1">border-inline-start: dashed red;</button>
        <button class="snippet-btn" data-index="2">border-inline-start: 1rem solid;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-inline-start: solid;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-inline-start: dashed red;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-inline-start: 1rem solid;
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-inline-start-color

逻辑属性：行起始方向边框的颜色。

border-inline-start-color 交互演示（MDN）

逻辑属性：行起始方向边框的颜色。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-inline-start-color 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（inline-start-color 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #000;
        border: 0.75em solid;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-inline-start-color: red;</button>
        <button class="snippet-btn" data-index="1">border-inline-start-color: #32a1ce;</button>
        <button class="snippet-btn" data-index="2">border-inline-start-color: rgb(170, 50, 220, 0.6);</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-inline-start-color: red;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-inline-start-color: #32a1ce;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-inline-start-color: rgb(170, 50, 220, 0.6);
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-inline-start-style

逻辑属性：行起始方向边框的样式。

border-inline-start-style 交互演示（MDN）

逻辑属性：行起始方向边框的样式。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-inline-start-style 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（inline-start-style 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #000;
        border: 0.75em solid;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-inline-start-style: dotted;</button>
        <button class="snippet-btn" data-index="1">border-inline-start-style: dotted;</button>
        <button class="snippet-btn" data-index="2">border-inline-start-style: groove;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-inline-start-style: dotted;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-inline-start-style: dotted;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-inline-start-style: groove;
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-inline-start-width

逻辑属性：行起始方向边框的宽度。

border-inline-start-width 交互演示（MDN）

逻辑属性：行起始方向边框的宽度。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-inline-start-width 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（inline-start-width 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: palegreen;
        color: #000;
        border: 0 solid crimson;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-inline-start-width: thick;</button>
        <button class="snippet-btn" data-index="1">border-inline-start-width: thick;</button>
        <button class="snippet-btn" data-index="2">border-inline-start-width: 4px;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-inline-start-width: thick;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-inline-start-width: thick;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-inline-start-width: 4px;
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-inline-end

逻辑属性：行结束方向边框的简写。

border-inline-end 交互演示（MDN）

逻辑属性：行结束方向边框的简写。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-inline-end 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（inline-end 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #8b008b;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-inline-end: solid;</button>
        <button class="snippet-btn" data-index="1">border-inline-end: dashed red;</button>
        <button class="snippet-btn" data-index="2">border-inline-end: 1rem solid;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-inline-end: solid;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-inline-end: dashed red;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-inline-end: 1rem solid;
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-inline-end-color

逻辑属性：行结束方向边框的颜色。

border-inline-end-color 交互演示（MDN）

逻辑属性：行结束方向边框的颜色。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-inline-end-color 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（inline-end-color 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #000;
        border: 0.75em solid;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-inline-end-color: red;</button>
        <button class="snippet-btn" data-index="1">border-inline-end-color: #32a1ce;</button>
        <button class="snippet-btn" data-index="2">border-inline-end-color: rgb(170, 50, 220, 0.6);</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-inline-end-color: red;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-inline-end-color: #32a1ce;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-inline-end-color: rgb(170, 50, 220, 0.6);
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-inline-end-style

逻辑属性：行结束方向边框的样式。

border-inline-end-style 交互演示（MDN）

逻辑属性：行结束方向边框的样式。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-inline-end-style 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（inline-end-style 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: #eee;
        color: #000;
        border: 0.75em solid;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-inline-end-style: dotted;</button>
        <button class="snippet-btn" data-index="1">border-inline-end-style: dotted;</button>
        <button class="snippet-btn" data-index="2">border-inline-end-style: groove;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-inline-end-style: dotted;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-inline-end-style: dotted;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-inline-end-style: groove;
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>

border-inline-end-width

逻辑属性：行结束方向边框的宽度。

border-inline-end-width 交互演示（MDN）

逻辑属性：行结束方向边框的宽度。

html

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>border-inline-end-width 属性演示 - MDN 示例</title>
    <meta name="description" content="边框与背景示例：border（inline-end-width 属性演示）。" />
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        min-height: 100vh;
        padding: 0;
      }
      .demo-layout {
        display: flex;
        height: 100vh;
        gap: 0;
      }
      .snippet-panel {
        width: 320px;
        flex-shrink: 0;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        overflow-y: auto;
        border-right: 1px solid #ddd;
        background: #fafafa;
      }
      .snippet-btn {
        padding: 10px 14px;
        border: 1px solid #ccc;
        border-radius: 6px;
        background: #fff;
        font-family: "JetBrains Mono", "Fira Code", monospace;
        font-size: 13px;
        color: #333;
        cursor: pointer;
        text-align: left;
        transition: all 0.2s;
        line-height: 1.4;
      }
      .snippet-btn:hover {
        border-color: #8083ff;
        background: #f0f0ff;
      }
      .snippet-btn.active {
        border-color: #8083ff;
        background: #e8e8ff;
        color: #571bc1;
        font-weight: 600;
      }
      .preview-panel {
        flex: 1;
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #fff;
        overflow: auto;
      }
      .preview-panel > section,
      .preview-panel > div:not(.snippet-panel):not(.demo-layout) {
        flex: 1;
        width: 100%;
        min-height: 0;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      #example-element {
        background-color: palegreen;
        color: #000;
        border: 0 solid crimson;
        padding: 0.75em;
        width: 80%;
        height: 100px;
        unicode-bidi: bidi-override;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-inline-end-width: thick;</button>
        <button class="snippet-btn" data-index="1">border-inline-end-width: thick;</button>
        <button class="snippet-btn" data-index="2">border-inline-end-width: 4px;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-inline-end-width: thick;
writing-mode: horizontal-tb;
}`,
        `#example-element {
  border-inline-end-width: thick;
writing-mode: vertical-rl;
}`,
        `#example-element {
  border-inline-end-width: 4px;
writing-mode: horizontal-tb;
direction: rtl;
}`,
      ];

      let styleEl = document.createElement("style");
      document.head.appendChild(styleEl);

      function applySnippet(index) {
        styleEl.textContent = snippets[index];
        document.querySelectorAll(".snippet-btn").forEach((btn, i) => {
          btn.classList.toggle("active", i === index);
        });
      }

      document.querySelectorAll(".snippet-btn").forEach((btn) => {
        btn.addEventListener("click", () => applySnippet(parseInt(btn.dataset.index)));
      });

      applySnippet(0);
    </script>
  </body>
</html>