圆角与阴影

背景与动机

在 CSS3 之前，实现圆角和阴影效果必须依赖图片拼接或多层 DOM 嵌套，开发效率极低且维护困难。CSS3 引入了 border-radius、box-shadow、text-shadow 以及 border-image 等原生属性，让开发者能够纯粹用 CSS 创建丰富的视觉效果，大幅减少了对图片资源的依赖。

为什么需要掌握这些特性？

减少 HTTP 请求：不再需要下载圆角图片或阴影素材
响应式友好：纯 CSS 效果可随元素尺寸自适应缩放
交互灵活：可配合 transition / animation 实现动态效果
渲染可控：理解底层渲染管线有助于做出性能友好的选择

特性全景图

图表渲染中…

核心概念

属性速查表

属性	用途	适用元素	可动画
`border-radius`	创建圆角边框	块级 / 行内块元素	✅
`box-shadow`	添加盒子阴影	块级 / 行内块元素	✅
`text-shadow`	添加文字阴影	文本元素	✅
`border-image`	用图像/渐变填充边框	块级元素	❌
`filter: drop-shadow()`	跟随实际轮廓投影	任意元素	✅

深入原理

border-radius 的几何模型

border-radius 的本质是定义一个四分之一椭圆来替换元素的直角。每个角由两个半径控制：水平半径（x）和垂直半径（y），默认两者相等形成四分之一圆弧。

code

圆角几何模型：

     水平半径 rx
    ◄──────────►
    ┌───────────╮ ▲
    │            ╲ │ 垂直半径 ry
    │             ╲│ ▼
    │              ╰────
    │

关键规则：

当 rx + ry > 对应边长 时，浏览器会按比例缩小，确保不溢出
斜杠 / 前是水平半径，后是垂直半径
百分比值相对于元素自身尺寸计算（水平半径相对宽度，垂直半径相对高度）

css

/* 当圆角值过大时，浏览器自动按比例缩减 */
.box {
  width: 100px;
  height: 50px;
  border-radius: 80px; /* 实际渲染会被缩减，不会溢出 */
}

/* 椭圆圆角：水平 50px，垂直 20px */
.ellipse-corner {
  border-radius: 50px / 20px;
}

/* 完整四值椭圆圆角 */
.complex {
  border-radius: 10px 20px 30px 40px / 5px 10px 15px 20px;
  /* 水平半径：左上10 右上20 右下30 左下40 */
  /* 垂直半径：左上5  右上10 右下15 左下20 */
}

box-shadow 的渲染机制

box-shadow 的渲染涉及以下步骤：

扩展阶段：根据 spread-radius 扩大/缩小阴影轮廓
模糊阶段：对扩展后的轮廓应用高斯模糊（半径 = blur-radius / 2）
偏移阶段：按 x-offset 和 y-offset 平移阴影
合成阶段：将阴影层与元素本身按层叠顺序合成

code

box-shadow 渲染管线：

原始矩形 ──► 扩展(spread) ──► 高斯模糊(blur/2) ──► 偏移(offset) ──► 合成
 ┌───┐        ┌─────┐        ╔═════╗              ╔═════╗          ┌───┐
 │   │   ►    │     │   ►    ║     ║    ►        ║     ║   ►      │   │
 └───┘        └─────┘        ╚═════╝              ╚═════╝          ╔═══╗
                                                                   ╚═══╝
                                                                  阴影+元素

性能关键点：

模糊半径越大，GPU 采样范围越大，性能消耗越高
多层阴影会叠加渲染成本，每增加一层就多一次模糊计算
box-shadow 仅触发重绘（Paint），不触发重排（Layout）

border-image 高级用法深度解析

border-image 是 CSS3 中最具创意但也最容易被误解的属性之一。它使用 九宫格切片（9-slice scaling）机制将一张图像或渐变分割为 9 个区域，分别填充边框的四个角、四条边和中心区域。

九宫格切片原理详解

code

border-image 九宫格切片模型：

源图像（如 90×90px，slice: 30px）

    30px   30px   30px
  ┌──────┬──────┬──────┐ ▲ 30px
  │ 角   │  边  │  角  │
  ├──────┼──────┼──────┤ │ 30px
  │ 边   │ 中心 │  边  │
  ├──────┼──────┼──────┤ │ 30px
  │ 角   │  边  │  角  │
  └──────┴──────┴──────┘

  角 → 不拉伸，原尺寸渲染
  边 → 根据 fill-rule 拉伸/平铺
  中心 → 可选填充（fill 关键字）

关键概念：

slice 值：决定从图像边缘向内切割多少像素
repeat 方式：控制边缘如何填充（stretch/repeat/round/space）
fill 关键字：是否保留中心区域

完整的 border-image 语法

css

/* 完整语法 */
border-image: source slice width outset repeat;

/* 示例 */
.border-image-full {
  border: 20px solid;
  border-image: 
    url('border.png')    /* source: 图像源 */
    30                   /* slice: 切片位置 */
    20px                 /* width: 边框宽度 */
    10px                 /* outset: 向外扩展 */
    round;               /* repeat: 平铺方式 */
}

实际应用场景

1. 渐变边框（最常用）

css

/* 线性渐变边框 */
.gradient-border {
  border: 4px solid;
  border-image: linear-gradient(135deg, #667eea, #764ba2) 1;
}

/* 多色渐变边框 */
.rainbow-border {
  border: 5px solid;
  border-image: linear-gradient(
    90deg, 
    red, orange, yellow, green, blue, indigo, violet
  ) 1;
}

/* 径向渐变边框 */
.radial-border {
  border: 10px solid;
  border-image: radial-gradient(circle, #ff6b6b, #4ecdc4) 1;
}

2. 装饰性边框

css

/* 使用图片创建装饰边框 */
.ornamental-border {
  border: 30px solid;
  border-image: url('ornament.png') 60 round;
  /* slice=60 表示从图像边缘 60px 处切割 */
  /* round 表示自动缩放以完整显示图案 */
}

/* 复古相框效果 */
.vintage-frame {
  border: 20px solid;
  border-image: url('vintage-frame.png') 40 round;
  padding: 10px;
}

3. 动画渐变边框

css

/* 旋转渐变边框 */
@keyframes border-rotate {
  to { --angle: 360deg; }
}

.animated-border {
  --angle: 0deg;
  border: 3px solid;
  border-image: linear-gradient(var(--angle), #ff6b6b, #4ecdc4, #667eea) 1;
  animation: border-rotate 3s linear infinite;
}

/* 脉冲边框 */
@keyframes border-pulse {
  0%, 100% { border-image-slice: 30; }
  50% { border-image-slice: 60; }
}

.pulse-border {
  border: 10px solid;
  border-image: linear-gradient(45deg, #ff6b6b, #4ecdc4) 1;
  animation: border-pulse 2s ease-in-out infinite;
}

slice 切片详解

css

/* slice 值决定九宫格的切割位置 */
/* 类似 margin 的简写规则 */

border-image-slice: 30;        /* 四边均为 30 */
border-image-slice: 30 20;     /* 上下30, 左右20 */
border-image-slice: 30 20 10;  /* 上30, 左右20, 下10 */
border-image-slice: 30 20 10 5; /* 上右下左各不同 */

/* fill 关键字：保留中心区域 */
border-image-slice: 30 fill;

/* 百分比值：相对于图像尺寸 */
border-image-slice: 25%;       /* 从图像 25% 处切割 */

slice 值的理解：

数值：表示从图像边缘向内切割的像素数
百分比：表示从图像边缘向内切割的百分比
fill：保留中心区域，否则中心透明

repeat 平铺方式对比

值	效果	适用场景	示例
`stretch`	拉伸填充（默认）	渐变边框	平滑过渡
`repeat`	重复平铺（可能截断）	图案边框	可能出现不完整图案
`round`	重复平铺并自动缩放	装饰边框	完整显示图案
`space`	重复平铺并在间隔中留白	特殊效果	图案间有间隙

css

/* 渐变边框推荐 round 或 stretch */
.gradient-border {
  border: 4px solid;
  border-image: linear-gradient(to right, #ff6b6b, #4ecdc4) 1;
  /* 渐变不需要切片，slice=1 表示从 1px 处切割 */
}

/* 图片边框推荐 round */
.image-border {
  border: 20px solid;
  border-image: url('ornament.png') 60 round;
}

/* 使用 space 创建间隔效果 */
.spaced-border {
  border: 20px solid;
  border-image: url('pattern.png') 40 space;
}

border-image 与 border-radius 的冲突

重要限制：border-image 会覆盖 border-radius 的效果，两者不能同时使用。

css

/* ❌ 错误：border-radius 失效 */
.wrong {
  border-radius: 20px;
  border-image: linear-gradient(45deg, #ff6b6b, #4ecdc4) 1;
  /* border-radius 不生效！ */
}

/* ✅ 解决方案：双层嵌套 */
.outer {
  padding: 4px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: 20px;
}

.inner {
  background: white;
  border-radius: 16px;
  padding: 20px;
}

渲染性能影响深度分析

不同阴影/圆角操作在浏览器渲染管线中的开销差异显著：

操作	渲染阶段	GPU 加速	性能影响
`border-radius`（静态）	Paint	✅ 合成层	低
`border-radius`（动画）	Paint + Composite	✅	中
`box-shadow`（静态）	Paint	✅	中（blur 越大越高）
`box-shadow`（动画）	Paint + Composite	⚠️ 每帧重绘	高
`text-shadow`（多层）	Paint	⚠️	高
`filter: drop-shadow`	Paint + Filter	✅	中高
`backdrop-filter`	Composite（独立通道）	✅	高（需采样背后内容）

为什么 box-shadow 动画性能差？

box-shadow 的变化（如 hover 时阴影扩大）会触发 Paint 阶段重新执行。Paint 是 CPU 密集型操作，浏览器需要重新计算每个像素的颜色值。而 transform 和 opacity 只触发 Composite 阶段，由 GPU 直接处理，性能远优于 Paint。

图表渲染中…

GPU 加速机制详解

现代浏览器对圆角和阴影的渲染采用了不同的优化策略：

1. 合成层（Compositing Layer）原理

当元素使用 border-radius 或 box-shadow 时，浏览器会为其创建独立的合成层：

code

合成层架构：

┌─────────────────────────────────────┐
│           主线程 (CPU)               │
│  ┌─────────┐  ┌─────────┐          │
│  │  Layer 1 │  │  Layer 2 │  ...    │
│  │ (静态)   │  │ (阴影)   │          │
│  └─────────┘  └─────────┘          │
└─────────────────────────────────────┘
              │
              ▼ 栅格化（Rasterize）
┌─────────────────────────────────────┐
│           GPU 线程                   │
│  ┌─────────┐  ┌─────────┐          │
│  │ Texture1 │  │ Texture2 │  ...    │
│  └─────────┘  └─────────┘          │
│              │                       │
│              ▼ 合成（Composite）      │
│         ┌─────────┐                 │
│         │ 最终画面 │                 │
│         └─────────┘                 │
└─────────────────────────────────────┘

2. 圆角的渲染优化

border-radius 的渲染经过高度优化：

静态圆角：仅在首次绘制时计算，后续帧直接复用
动画圆角：如果只改变 border-radius 值，会触发重绘
配合 transform：使用 transform: scale() 配合圆角可避免重绘

css

/* ✅ 高性能：使用 transform 缩放 */
.card {
  border-radius: 20px;
  transform: scale(1);
  transition: transform 0.3s;
}

.card:hover {
  transform: scale(1.05); /* 仅触发合成，不重绘 */
}

/* ❌ 低性能：直接改变 border-radius */
.card {
  border-radius: 20px;
  transition: border-radius 0.3s;
}

.card:hover {
  border-radius: 30px; /* 触发重绘 */
}

3. 阴影的渲染开销

box-shadow 的渲染涉及高斯模糊计算，开销与模糊半径成正比：

code

模糊计算复杂度：

blur-radius = 10px  → 采样范围 20×20 像素
blur-radius = 20px  → 采样范围 40×40 像素（4倍开销）
blur-radius = 50px  → 采样范围 100×100 像素（25倍开销）

性能优化策略：

css

/* 策略 1：使用伪元素 + opacity 动画 */
.card {
  position: relative;
}

.card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.card:hover::after {
  opacity: 1; /* 仅改变 opacity，性能最优 */
}

/* 策略 2：使用 will-change 提示浏览器 */
.animated-shadow {
  will-change: box-shadow;
  transition: box-shadow 0.3s;
}

/* 动画结束后移除 will-change */
.animated-shadow:not(:hover) {
  will-change: auto;
}

/* 策略 3：使用 filter: drop-shadow 替代 */
.drop-shadow-card {
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.2));
  /* drop-shadow 可以使用 GPU 加速 */
}

4. 多层阴影的性能陷阱

每增加一层阴影，渲染开销就会叠加：

css

/* ❌ 性能差：多层阴影 */
.bad {
  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.1),
    0 4px 8px rgba(0, 0, 0, 0.1),
    0 8px 16px rgba(0, 0, 0, 0.1),
    0 16px 32px rgba(0, 0, 0, 0.1);
  /* 4层阴影 = 4次模糊计算 */
}

/* ✅ 性能好：使用渐变模拟多层阴影 */
.good {
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(0, 0, 0, 0.05) 100%
  );
}

5. 移动端性能优化

移动设备 GPU 性能有限，需要特别注意：

css

/* 移动端优化策略 */
@media (max-width: 768px) {
  .card {
    /* 减少模糊半径 */
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    /* 而非 0 10px 30px */
    
    /* 使用简单的圆角 */
    border-radius: 8px;
    /* 避免复杂的椭圆圆角 */
  }
  
  /* 禁用大面积阴影 */
  .large-shadow {
    box-shadow: none;
  }
}

渲染性能检测工具

使用 Chrome DevTools 检测渲染性能：

javascript

// 1. 打开 Performance 面板
// 2. 勾选 "Paint flashing"（绘制闪烁）
// 3. 观察页面变化时的绿色闪烁区域

// 4. 使用 Layers 面板查看合成层
// - 打开 More tools > Layers
// - 查看哪些元素创建了独立的层
// - 层过多会导致性能问题

// 5. 使用 Rendering 面板
// - 打开 More tools > Rendering
// - 勾选 "Layer borders" 查看层边界
// - 勾选 "Paint flashing" 查看重绘区域

性能指标参考：

指标	优秀	良好	需优化
帧率（FPS）	60	30-60	<30
重绘区域	<10%	10-30%	>30%
合成层数量	<20	20-50	>50
单帧渲染时间	<16ms	16-33ms	>33ms

代码示例

border-radius 圆角

基本语法与多值规则

css

/* 四值顺序：左上 → 右上 → 右下 → 左下 */
/* ┌─────────────────┐
   │ ① 左上     ② 右上│
   │                 │
   │ ④ 左下     ③ 右下│
   └─────────────────┘ */

border-radius: 10px;              /* 四角相同 */
border-radius: 10px 20px;         /* ①③=10px, ②④=20px */
border-radius: 10px 20px 30px;    /* ①=10, ②④=20, ③=30 */
border-radius: 10px 20px 30px 40px; /* 各不同 */

单独控制每个角

css

border-top-left-radius: 10px;
border-top-right-radius: 20px;
border-bottom-right-radius: 30px;
border-bottom-left-radius: 40px;

/* 椭圆圆角：水平半径 垂直半径 */
border-top-left-radius: 20px 10px;

常见形状速查

css

/* 圆形 */
.circle { width: 100px; height: 100px; border-radius: 50%; }

/* 椭圆 */
.ellipse { width: 200px; height: 100px; border-radius: 50%; }

/* 胶囊形 */
.pill { height: 40px; border-radius: 999px; }

/* 半圆 */
.half-circle { width: 100px; height: 50px; border-radius: 100px 100px 0 0; }

/* 四分之一圆 */
.quarter { width: 50px; height: 50px; border-radius: 0 0 0 50px; }

/* 叶形 */
.leaf { border-radius: 0 100% 0 100%; }

/* 对话框气泡 */
.bubble { border-radius: 20px 20px 20px 0; }

百分比 vs 固定值

css

/* 固定值：精确控制，适合固定尺寸 */
.fixed { width: 200px; height: 100px; border-radius: 10px; }

/* 百分比：响应式，相对自身尺寸 */
.responsive { width: 20%; border-radius: 10%; }

/* 圆形推荐百分比：任何尺寸下都是正圆 */
.circle { width: 100px; height: 100px; border-radius: 50%; }

border-bottom-left-radius 交互演示（MDN）

设置元素左下角的圆角半径。

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-bottom-left-radius 属性演示 - MDN 示例</title>
    <meta name="description" content="演示border（bottom-left-radius 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;
      }
      #example-element {
        width: 80%;
        height: 80%;
        display: flex;
        justify-content: center;
        flex-direction: column;
        background-color: #5b6dcd;
        color: white;
        padding: 10px;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-bottom-left-radius: 80px 80px;</button>
        <button class="snippet-btn" data-index="1">border-bottom-left-radius: 250px 100px;</button>
        <button class="snippet-btn" data-index="2">border-bottom-left-radius: 50%;</button>
        <button class="snippet-btn" data-index="3">border-bottom-left-radius: 50%;</button>
      </div>
      <div class="preview-panel">
        <section class="default-example" id="default-example">
          <div class="transition-all" id="example-element">这是一个左下角带有圆角的盒子。</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-bottom-left-radius: 80px 80px;
}`,
        `#example-element {
  border-bottom-left-radius: 250px 100px;
}`,
        `#example-element {
  border-bottom-left-radius: 50%;
}`,
        `#example-element {
  border-bottom-left-radius: 50%;
border: black 10px double;
background-clip: content-box;
}`,
      ];

      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-end-end-radius 交互演示（MDN）

逻辑属性：设置块末方向和行末方向交界处的圆角。

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-end-end-radius 属性演示 - MDN 示例</title>
    <meta name="description" content="演示border（end-end-radius 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;
      }
      #example-element {
        width: 80%;
        height: 80%;
        display: flex;
        justify-content: center;
        flex-direction: column;
        background-color: #5b6dcd;
        color: white;
        padding: 10px;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-end-end-radius: 80px 80px;</button>
        <button class="snippet-btn" data-index="1">border-end-end-radius: 250px 100px;</button>
        <button class="snippet-btn" data-index="2">border-end-end-radius: 50%;</button>
        <button class="snippet-btn" data-index="3">border-end-end-radius: 50%;</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 bottom right rounded corner.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-end-end-radius: 80px 80px;
}`,
        `#example-element {
  border-end-end-radius: 250px 100px;
direction: rtl;
}`,
        `#example-element {
  border-end-end-radius: 50%;
writing-mode: vertical-lr;
}`,
        `#example-element {
  border-end-end-radius: 50%;
writing-mode: vertical-rl;
}`,
      ];

      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-end-start-radius 交互演示（MDN）

逻辑属性：设置块末方向和行首方向交界处的圆角。

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-end-start-radius 属性演示 - MDN 示例</title>
    <meta name="description" content="演示border（end-start-radius 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;
      }
      #example-element {
        width: 80%;
        height: 80%;
        display: flex;
        justify-content: center;
        flex-direction: column;
        background-color: #5b6dcd;
        color: white;
        padding: 10px;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-end-start-radius: 80px 80px;</button>
        <button class="snippet-btn" data-index="1">border-end-start-radius: 250px 100px;</button>
        <button class="snippet-btn" data-index="2">border-end-start-radius: 50%;</button>
        <button class="snippet-btn" data-index="3">border-end-start-radius: 50%;</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 bottom left rounded corner.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-end-start-radius: 80px 80px;
}`,
        `#example-element {
  border-end-start-radius: 250px 100px;
direction: rtl;
}`,
        `#example-element {
  border-end-start-radius: 50%;
writing-mode: vertical-lr;
}`,
        `#example-element {
  border-end-start-radius: 50%;
writing-mode: vertical-rl;
}`,
      ];

      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-start-end-radius 交互演示（MDN）

逻辑属性：设置块首方向和行末方向交界处的圆角。

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-start-end-radius 属性演示 - MDN 示例</title>
    <meta name="description" content="演示border（start-end-radius 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;
      }
      #example-element {
        width: 80%;
        height: 80%;
        display: flex;
        justify-content: center;
        flex-direction: column;
        background-color: #5b6dcd;
        color: white;
        padding: 10px;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-start-end-radius: 80px 80px;</button>
        <button class="snippet-btn" data-index="1">border-start-end-radius: 250px 100px;</button>
        <button class="snippet-btn" data-index="2">border-start-end-radius: 50%;</button>
        <button class="snippet-btn" data-index="3">border-start-end-radius: 50%;</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 top right rounded corner.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-start-end-radius: 80px 80px;
}`,
        `#example-element {
  border-start-end-radius: 250px 100px;
direction: rtl;
}`,
        `#example-element {
  border-start-end-radius: 50%;
writing-mode: vertical-lr;
}`,
        `#example-element {
  border-start-end-radius: 50%;
writing-mode: vertical-rl;
}`,
      ];

      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-start-start-radius 交互演示（MDN）

逻辑属性：设置块首方向和行首方向交界处的圆角。

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-start-start-radius 属性演示 - MDN 示例</title>
    <meta name="description" content="演示border（start-start-radius 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;
      }
      #example-element {
        width: 80%;
        height: 80%;
        display: flex;
        justify-content: center;
        flex-direction: column;
        background-color: #5b6dcd;
        color: white;
        padding: 10px;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-start-start-radius: 80px 80px;</button>
        <button class="snippet-btn" data-index="1">border-start-start-radius: 250px 100px;</button>
        <button class="snippet-btn" data-index="2">border-start-start-radius: 50%;</button>
        <button class="snippet-btn" data-index="3">border-start-start-radius: 50%;</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 top left rounded corner.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-start-start-radius: 80px 80px;
}`,
        `#example-element {
  border-start-start-radius: 250px 100px;
direction: rtl;
}`,
        `#example-element {
  border-start-start-radius: 50%;
writing-mode: vertical-lr;
}`,
        `#example-element {
  border-start-start-radius: 50%;
writing-mode: vertical-rl;
}`,
      ];

      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>

box-shadow 盒子阴影

基本语法

css

/* box-shadow: [inset] x偏移 y偏移 模糊半径 扩展半径 颜色 */

/* 基本外阴影 */
.card { box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); }

/* 带扩展 */
.extended { box-shadow: 0 2px 4px 2px rgba(0, 0, 0, 0.1); }

/* 纯色偏移（无模糊） */
.hard { box-shadow: 4px 4px 0 #ddd; }

/* 负偏移 */
.negative { box-shadow: -4px -4px 8px rgba(0, 0, 0, 0.2); }

/* 负扩展（缩小阴影范围） */
.tight { box-shadow: 0 0 10px -5px rgba(0, 0, 0, 0.5); }

内阴影

css

/* 基本内阴影 */
.inset { box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1); }

/* 凹陷效果 */
.pressed {
  box-shadow:
    inset 2px 2px 5px rgba(0, 0, 0, 0.2),
    inset -2px -2px 5px rgba(255, 255, 255, 0.5);
}

/* 内发光 */
.inner-glow { box-shadow: inset 0 0 20px rgba(255, 200, 0, 0.5); }

多层阴影与常见效果

css

/* 多层阴影叠加（层次感） */
.layered {
  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.1),
    0 4px 8px rgba(0, 0, 0, 0.1),
    0 8px 16px rgba(0, 0, 0, 0.1);
}

/* 新拟态（Neumorphism） */
.neumorphism {
  background: #e0e0e0;
  box-shadow:
    8px 8px 16px rgba(0, 0, 0, 0.1),
    -8px -8px 16px rgba(255, 255, 255, 0.8);
}

/* 模拟边框 */
.fake-border { box-shadow: 0 0 0 1px #ddd; }

/* 多层边框 */
.multi-border {
  box-shadow:
    0 0 0 1px #ddd,
    0 0 0 3px #fff,
    0 0 0 4px #ddd;
}

/* 聚焦发光 */
.focus-glow:focus {
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
  outline: none;
}

/* 单边阴影 */
.bottom-only { box-shadow: 0 4px 8px -2px rgba(0, 0, 0, 0.2); }
.top-only { box-shadow: 0 -4px 8px -2px rgba(0, 0, 0, 0.2); }

text-shadow 文字阴影

css

/* 基本阴影 */
.basic { text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3); }

/* 发光文字 */
.glow {
  text-shadow:
    0 0 10px #fff,
    0 0 20px #fff,
    0 0 30px #e60073;
}

/* 3D 文字 */
.text-3d {
  text-shadow:
    1px 1px 0 #ccc,
    2px 2px 0 #c9c9c9,
    3px 3px 0 #bbb,
    4px 4px 0 #b9b9b9,
    5px 5px 0 #aaa;
}

/* 霓虹灯 */
.neon {
  color: #fff;
  text-shadow:
    0 0 5px #fff,
    0 0 10px #fff,
    0 0 20px #ff00de,
    0 0 30px #ff00de,
    0 0 40px #ff00de;
}

/* 描边效果 */
.stroke {
  text-shadow:
    -1px -1px 0 #000,
    1px -1px 0 #000,
    -1px 1px 0 #000,
    1px 1px 0 #000;
}

border-image 高级用法

基本语法

css

/* border-image: source slice width outset repeat; */

/* 使用图片 */
.fancy-border {
  border: 10px solid;
  border-image: url('border.png') 30 round;
}

/* 使用渐变 */
.gradient-border {
  border: 4px solid;
  border-image: linear-gradient(135deg, #667eea, #764ba2) 1;
}

/* 多色渐变边框 */
.rainbow-border {
  border: 5px solid;
  border-image: linear-gradient(90deg, red, orange, yellow, green, blue, indigo, violet) 1;
}

slice 切片详解

css

/* slice 值决定九宫格的切割位置 */
/* 类似 margin 的简写规则 */

border-image-slice: 30;        /* 四边均为 30 */
border-image-slice: 30 20;     /* 上下30, 左右20 */
border-image-slice: 30 20 10;  /* 上30, 左右20, 下10 */
border-image-slice: 30 20 10 5; /* 上右下左各不同 */

/* fill 关键字：保留中心区域 */
border-image-slice: 30 fill;

repeat 平铺方式

值	效果
`stretch`	拉伸填充（默认）
`repeat`	重复平铺（可能截断）
`round`	重复平铺并自动缩放以适应
`space`	重复平铺并在间隔中留白

css

/* 渐变边框推荐 round 或 stretch */
.gradient-border {
  border: 4px solid;
  border-image: linear-gradient(to right, #ff6b6b, #4ecdc4) 1;
  /* 渐变不需要切片，slice=1 表示从 1px 处切割 */
}

/* 图片边框推荐 round */
.image-border {
  border: 20px solid;
  border-image: url('ornament.png') 60 round;
}

渐变边框实战

css

/* 卡片渐变边框 */
.gradient-card {
  position: relative;
  padding: 2px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: 12px;
}

.gradient-card > .content {
  background: white;
  border-radius: 10px;
  padding: 20px;
}

/* 动画渐变边框 */
@keyframes border-rotate {
  to { --angle: 360deg; }
}

.animated-border {
  --angle: 0deg;
  border: 3px solid;
  border-image: linear-gradient(var(--angle), #ff6b6b, #4ecdc4, #667eea) 1;
  animation: border-rotate 3s linear infinite;
}

border-image 交互演示（MDN）

用图片代替 border 样式绘制边框，支持九宫格切片。

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-image 属性演示 - MDN 示例</title>
    <meta name="description" content="演示border（image 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;
      }
      #example-element {
        width: 80%;
        height: 80%;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 50px;
        background: #fff3d4;
        color: #000;
        border: 30px solid;
        border-image: url("data:image/png;base64,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")
          30 round;
        font-size: 1.2em;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">
          border-image:
          url("data:image/png;base64,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")
          30;
        </button>
        <button class="snippet-btn" data-index="1">
          border-image:
          url("data:image/png;base64,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")
          30 /
        </button>
        <button class="snippet-btn" data-index="2">
          border-image:
          url("data:image/png;base64,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")
          30
        </button>
        <button class="snippet-btn" data-index="3">border-image: linear-gradient(#f6b73c, #4d9f0c) 30;</button>
        <button class="snippet-btn" data-index="4">
          border-image: repeating-linear-gradient(30deg, #4d9f0c, #9198e5, #4d9f0c 20px)
        </button>
      </div>
      <div class="preview-panel">
        <section id="default-example">
          <div id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-image: url("data:image/png;base64,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") 30;
}`,
        `#example-element {
  border-image: url("data:image/png;base64,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") 30 /
  19px round;
}`,
        `#example-element {
  border-image: url("data:image/png;base64,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") 30
  fill / 30px / 30px space;
}`,
        `#example-element {
  border-image: linear-gradient(#f6b73c, #4d9f0c) 30;
}`,
        `#example-element {
  border-image: repeating-linear-gradient(30deg, #4d9f0c, #9198e5, #4d9f0c 20px)
  60;
}`,
      ];

      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-image-slice 交互演示（MDN）

定义 border-image 图片的切片尺寸（九宫格划分）。

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-image-slice 属性演示 - MDN 示例</title>
    <meta name="description" content="演示border（image-slice 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;
      }
      #example-element {
        width: 80%;
        height: 80%;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 50px;
        background: #fff3d4;
        color: #000;
        border: 30px solid;
        border-image: url("data:image/png;base64,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")
          30 round;
        font-size: 1.2em;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-image-slice: 30;</button>
        <button class="snippet-btn" data-index="1">border-image-slice: 30 fill;</button>
        <button class="snippet-btn" data-index="2">border-image-slice: 44;</button>
        <button class="snippet-btn" data-index="3">
          border-image:
          url("data:image/svg+xml;base64,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 284 184"><defs><style>.a{fill:#eee;}.b{fill:#e66465;}</style></defs><title>border-florid</title><path class="a" d="M137.47,121.74a17.38,17.38,0,0,0-.62-5c-4.2,4.42-7.21,9.13-13.84,9.71-5.49.48-12-4.87-12.42-10.38-.32-4.69,2.22-9.87,5.5-13,1.19-1.12,4.52-2.4,4.59-4.24.12-3-1.47-1.39-3-1.51-5.84-.44-12.27-.59-13.28-7.74-.48-3.44-.7-10.9,1.91-13.64,2.34-2.46,8.57-3.13,11.64-2.46,1.84.41,7.58,3.58,9.25,1.49,1.29-1.62-2.16-8.16-2.32-10.39a11.64,11.64,0,0,1,1-6c2.13-4.67,8-6.45,13.15-5.39a11.85,11.85,0,0,1,8.37,6.64c1.41,2.88.72,6.39,2.11,9.17a30.5,30.5,0,0,0,2.64-2.82c1.65-1.78,3.24-3.73,5.5-4.74,3.49-1.55,6-.7,9.17.79,4.63,2.22,8.77,6.43,7.73,12.11-.65,3.54-6.26,10.09-9.81,11,5.84,1.79,11.49,1.28,14.31,7.76,1.85,4.26.89,11-1.71,14.78-2,2.85-5,5.2-8.5,4.66-2.29-.35-1.66-.68-3.52-1.68s-.17-.67-3.22-1.27a35.68,35.68,0,0,1-4.66-.78c.09,3.24,4.3,5.1,5.43,8,1.85,4.75-2.29,9.33-5.91,11.86-3,2.09-8.27,2.67-12,2.22-2.47-.3-2.52-.53-4.22-2.5C138.09,125.38,137.47,125.92,137.47,121.74Zm-4.82-27.51c2.52,3.78,4.66,7.28,9.64,6.69,4.59-.53,7.38-2.47,7.77-7.31.31-3.76-4.35-8.86-8-9.41C136.84,83.43,133.29,89.94,132.65,94.23Z" transform="translate(0 0)"/><path class="b" d="M56.14,42.19l.19-.8C59,42.59,60.4,45.6,64,44.73c2.72-.67,4.86-3.94,5.56-6.46a13.14,13.14,0,0,0-2.8-12.4,12.55,12.55,0,0,0-9-4.22c-2.89-.21-5.68,0-8.56-.44-1.85-.29-4.17-1.13-6-1.13-.2,0,2.75,5,2.94,6,.72,3.63-1.31,6.56-4.33,8.16-5.64,3-10.3-.7-14.1-6.51S13.4,17.76,6.18,20.78C2.32,22.4.63,27.38,2.42,31.22c1.17,2.52,1.37,1.92,3.94,2.3,2.4.36,3.87.93,1.53,3C2.05,41.79-.22,30.14,0,26.52.36,21.21,2.41,17.29,5.58,13c7-9.55,20.3-14.12,31.67-12.77C43,.91,54.09,5.41,49.44,13.3c-1.34,2.29-3.67,2.19-5.45,3.62-1.4,1.14-1.79.18.19,1.27,4.41,2.46,10.74.52,15.53,1,1.35.15,4.84,1.53,5.13,1s-1.41-4.1-1.49-4.72c-.54-4,.55-7.81,3.67-10.26,1.56-1.22,6.6-3.47,5-.29-1,2-4,2.7-4.94,5.16-3.51,8.69,4.59,13.34,6.86,21,.41,1.39.46,3,1.25,4.28.53.86,2.94,2.1,2.36,3.3s-2.68,0-3.87.48-2.53,2.56-3.48,3.55c-1.94,2-3.79,3.56-6.49,4S56.14,45.78,56.14,42.19Z" transform="translate(0 0)"/><path class="b" d="M142.56,28.94c-6.22,12.54-24.25,11.82-35.77,8.21-3.18-1-5.73-1.66-8.61-3.57-2.16-1.42-5.53-3-7.37-4.72-1.12-1-1.21-2.49-2.13-3.4s-2.12-1.13-3-2.13c-2.1-2.53-2.61-6.24-2.84-9.34-.34-4.63.28-9.38,5-11.78,5.94-3,12.32,3.19,9.83,9.25-1.61,3.93-8.17,4.14-5.62-.39.52-.93,2.11-.27,2.67-1.79a3.63,3.63,0,0,0-.7-2.91c-1.71-2.06-5.39-1.31-7.1.31S85.58,10,85.7,12.19c.75,12.63,17.13,23.56,29.16,23.56,0-.68-4.75-3.8-5.35-4.59a52,52,0,0,1-4.67-7.42c-1.94-3.81-2.35-10.85-1.21-15,1.19-4.32,3.05-7.23,7.8-8.27,2.76-.61,7.59.26,8.73,3.41.48,1.33.93,5.78.06,6.14-1.6.64-1-.91-1.42-1.39a16.16,16.16,0,0,0-1-2c-3.43-7.88-11.9-.11-7.67,3.86,1.86,1.76,4.42,1.48,6.68,1.88,2.89.51,4.75,1.07,6.13,3.27,2,3.09,1.23,6.41-1.1,9.3-4,5-9.12.89-13.07-1.48.2,2.44,3.3,5.64,5,7.36,3,3.06,6.63,4.17,10.75,4.27a19.27,19.27,0,0,0,10.56-2.6,11.31,11.31,0,0,0,4.64-5.62c.35-.85,2-3.92,2-4.48-1.86-.12-3.85,2.9-6,3.29a6.06,6.06,0,0,1-6.28-3.44c-1.74-4.21-.5-17.1,6.35-12.62,1.92,1.25,2.87,4.71,4,1.39C141,7.11,135.81,4,141,.83c3.74-2.29,6.88.46,7.51,4.44.53,3.35-2,5.48-2,8.68,2.35-.49,3.4-4.32,5.69-5.09s3,1.22,4.41,2.49c1.62,1.45,2.62,1.83,2.65,3.91,0-.42-.82,2.13-.81,2.06-.25,1.54.25,3-.39,4.58a9,9,0,0,1-1.53,2.38c-3.92,5.16-7.11,1-11.62-.77-1.41,2.11,1.5,6.31,2.89,7.68,2.2,2.19,6,3.09,8.94,3.8,6.8,1.65,12.71-.62,15.48-7s-1-1.84-4.9-3.52C163.21,22.73,163,18,166,15c1.41-1.39,3.33-1.95,4.52-3.44,2.38-3,1.36-7.48-2.86-7.65-1.56-.06-3,.3-3.63,2s.69,2.25.69,3.7c0,3.58-2.74.72-3.5-1.41-2.28-6.37,7.34-8.36,11.41-6.5a14.62,14.62,0,0,1,7.3,19.08c-1.37,3.05-3,6.64-5.42,9.06-1.21,1.24-3.38,2.35-4,4-1.38,3.71,2.33.92,4.67.4,6.08-1.36,9.26-3.29,14.14-7.69,3.77-3.41,8.81-8.13,9.52-13.39s-6-10.3-8.74-4.17c-.69,1.56,1.82,8.22-2.38,5-3.84-3-1.17-9.16,1.92-11.46,5.65-4.2,11.08,3.59,11.53,8.84,1,11.49-10.4,19.36-19.49,23.62-6.63,3.11-13.49,5-21.11,4.43-4.42-.34-9.93-2-13.52-4.66C146.05,34.07,142.34,29.15,142.56,28.94Z" transform="translate(0 0)"/><path class="b" d="M39.44,73.53c1,4.33-2,9.92-4.66,13.52-.71,1-5.62,4.67-5.84,4.45C38,98.71,39.55,105,37.43,115.67c-.19,1-.85,3-1.68,3.52-.58.37-3.8,4.76-4.59,5.36a51,51,0,0,1-7.42,4.66c-3.81,1.95-10.85,2.35-15,1.22-4.32-1.19-7.22-3.05-8.27-7.8-.6-2.76.26-7.59,3.41-8.73,1.33-.49,5.79-.93,6.14-.06.64,1.59-.91,1-1.39,1.41a18.1,18.1,0,0,0-2,1c-7.88,3.43-.11,11.9,3.86,7.67,1.76-1.86,1.48-4.42,1.88-6.68.51-2.89,1.07-4.75,3.27-6.13,3.09-2,6.41-1.23,9.3,1.1,5,4,.89,9.12-1.48,13.06,2.44-.19,5.64-3.29,7.36-5,3.06-3,4.17-6.64,4.27-10.75A19.27,19.27,0,0,0,32.54,99a11.22,11.22,0,0,0-5.62-4.64c-.85-.35-3.92-2-4.48-2-.12,1.87,2.9,3.86,3.29,6a6.06,6.06,0,0,1-3.44,6.28c-4.21,1.74-17.1.5-12.62-6.35,1.25-1.92,4.71-2.87,1.39-4C7.11,93.06,4,98.24.83,93.05c-2.29-3.74.46-6.89,4.44-7.51,3.35-.53,5.48,2,8.68,2-.49-2.34-4.32-3.4-5.09-5.68s1.22-3,2.49-4.41c1.45-1.62,1.83-2.62,3.91-2.65-.42,0,2.13.82,2.06.81,1.54.24,3-.25,4.58.38a9.26,9.26,0,0,1,2.38,1.53c5.17,3.93,1,7.12-.77,11.63,2.11,1.4,6.31-1.51,7.69-2.89,2.18-2.2,3.08-6,3.79-8.95,1.65-6.79-.62-12.7-7-15.47s-1.84,1-3.51,4.9C22.73,70.85,18,71.06,15,68.1c-1.39-1.41-1.95-3.34-3.44-4.52-3-2.38-7.48-1.36-7.65,2.85-.06,1.57.3,3,2,3.63s2.25-.68,3.7-.68c3.58,0,.72,2.73-1.41,3.5C1.84,75.16-.15,65.54,1.72,61.47a14.6,14.6,0,0,1,19.07-7.3c3.05,1.37,6.65,3,9.06,5.41,1.24,1.22,5.12,3.55,6.49,4.72C38.5,66.15,38.83,70.75,39.44,73.53Z" transform="translate(0 0)"/><path class="b" d="M39.22,110.47c-.94-4.33,2-9.92,4.66-13.52.71-1,5.62-4.67,5.84-4.45C40.66,85.29,39.12,79,41.23,68.33c.19-1,.86-3,1.68-3.52.58-.37,3.8-4.76,4.59-5.36a51.57,51.57,0,0,1,7.42-4.66c3.81-1.95,10.85-2.35,15-1.22,4.32,1.19,7.22,3,8.26,7.8.61,2.76-.26,7.59-3.41,8.73-1.33.49-5.78.93-6.13.06-.65-1.59.91-1,1.38-1.41a18.08,18.08,0,0,0,2-1c7.87-3.43.1-11.9-3.87-7.67-1.76,1.86-1.48,4.42-1.88,6.68-.5,2.89-1.07,4.75-3.26,6.13-3.1,2-6.42,1.23-9.31-1.1-5-4-.88-9.12,1.48-13.06-2.43.19-5.63,3.29-7.35,5a14.73,14.73,0,0,0-4.27,10.75A19.18,19.18,0,0,0,46.13,85a11.24,11.24,0,0,0,5.61,4.64c.86.35,3.92,2,4.48,2,.13-1.87-2.89-3.86-3.29-6a6.06,6.06,0,0,1,3.45-6.28c4.2-1.74,17.09-.5,12.61,6.35-1.25,1.92-4.7,2.87-1.39,4,4,1.29,7.06-3.89,10.23,1.3,2.29,3.74-.46,6.89-4.43,7.51-3.35.53-5.49-2-8.69-2,.49,2.34,4.32,3.4,5.09,5.68s-1.22,3-2.48,4.41c-1.46,1.62-1.84,2.62-3.91,2.65.42,0-2.14-.82-2.07-.81-1.54-.24-3,.25-4.58-.38a9,9,0,0,1-2.37-1.53c-5.17-3.93-1-7.12.76-11.63-2.11-1.4-6.3,1.51-7.68,2.89-2.19,2.2-3.09,6-3.8,8.95-1.65,6.79.63,12.7,7,15.47s1.85-1,3.52-4.9c1.77-4.13,6.54-4.34,9.48-1.38,1.4,1.41,2,3.34,3.45,4.52,3,2.38,7.47,1.36,7.64-2.85.07-1.57-.3-3-2-3.63s-2.25.68-3.71.68c-3.58,0-.71-2.73,1.41-3.5,6.38-2.28,8.37,7.34,6.5,11.41a14.6,14.6,0,0,1-19.07,7.3c-3.06-1.37-6.65-3-9.07-5.41-1.24-1.22-5.11-3.55-6.48-4.72C40.17,117.85,39.83,113.25,39.22,110.47Z" transform="translate(0 0)"/><path class="b" d="M63.74,137.33c2.7.41,4.55,1.95,6.49,4,1,1,2.16,3,3.48,3.55s3.25-.78,3.87.48-1.83,2.44-2.36,3.3c-.79,1.28-.84,2.89-1.25,4.28-2.27,7.63-10.37,12.28-6.86,21,1,2.46,3.93,3.13,4.94,5.16,1.57,3.18-3.47.93-5-.29-3.12-2.45-4.21-6.26-3.67-10.26.08-.62,1.79-4.2,1.49-4.72s-3.78.88-5.13,1c-4.79.49-11.12-1.45-15.53,1-2,1.09-1.59.13-.19,1.27,1.78,1.43,4.11,1.33,5.45,3.62,4.65,7.89-6.48,12.39-12.19,13.07C25.88,185.12,12.62,180.55,5.58,171,2.41,166.71.36,162.79,0,157.48c-.24-3.62,2-15.27,7.87-10,2.34,2.1.87,2.67-1.53,3-2.57.38-2.77-.22-3.94,2.3-1.79,3.84-.1,8.82,3.76,10.44,7.22,3,17.7-1,21.54-6.9s8.46-9.47,14.1-6.51c3,1.6,5,4.53,4.33,8.16-.19,1-3.14,5.95-2.94,5.95,1.79,0,4.11-.84,6-1.13,2.88-.45,5.67-.23,8.56-.44a12.55,12.55,0,0,0,9-4.22,13.14,13.14,0,0,0,2.8-12.4c-.7-2.52-2.84-5.79-5.56-6.46-3.55-.87-4.93,2.14-7.62,3.34l-.19-.8C56.14,138.22,61,136.91,63.74,137.33Z" transform="translate(0 0)"/><path class="b" d="M227.86,141.81l-.19.8c-2.69-1.2-4.07-4.21-7.62-3.34-2.72.67-4.86,3.94-5.56,6.46a13.14,13.14,0,0,0,2.8,12.4,12.55,12.55,0,0,0,9,4.22c2.89.21,5.68,0,8.56.44,1.85.29,4.17,1.13,6,1.13.2,0-2.75-5-2.94-5.95-.72-3.63,1.31-6.56,4.33-8.16,5.64-3,10.3.7,14.1,6.51s14.32,9.92,21.54,6.9c3.86-1.62,5.55-6.6,3.76-10.44-1.17-2.52-1.37-1.92-3.94-2.3-2.4-.36-3.87-.93-1.53-3,5.84-5.24,8.11,6.41,7.87,10-.34,5.31-2.39,9.23-5.56,13.52-7,9.55-20.3,14.12-31.67,12.77-5.71-.68-16.84-5.18-12.19-13.07,1.34-2.29,3.67-2.19,5.45-3.62,1.4-1.14,1.79-.18-.19-1.27-4.41-2.46-10.74-.52-15.53-1-1.35-.15-4.84-1.53-5.13-1s1.41,4.1,1.49,4.72c.54,4-.55,7.81-3.67,10.26-1.56,1.22-6.6,3.47-5,.29,1-2,4-2.7,4.94-5.16,3.51-8.69-4.59-13.34-6.86-21-.41-1.39-.46-3-1.25-4.28-.53-.86-2.94-2.1-2.36-3.3s2.68,0,3.87-.48,2.53-2.56,3.48-3.55c1.94-2,3.79-3.56,6.49-4S227.86,138.22,227.86,141.81Z" transform="translate(0 0)"/><path class="b" d="M141.44,155.06c6.22-12.54,24.25-11.82,35.77-8.21,3.18,1,5.73,1.66,8.61,3.57,2.16,1.42,5.53,3,7.37,4.72,1.12,1,1.21,2.49,2.13,3.4s2.12,1.13,3,2.13c2.1,2.53,2.61,6.24,2.84,9.34.34,4.63-.28,9.38-5.05,11.78-5.94,3-12.32-3.19-9.83-9.25,1.61-3.93,8.17-4.14,5.62.39-.52.93-2.11.27-2.67,1.79a3.63,3.63,0,0,0,.7,2.91c1.71,2.06,5.39,1.31,7.1-.31s1.44-3.36,1.32-5.51c-.75-12.63-17.13-23.56-29.16-23.56,0,.68,4.75,3.8,5.35,4.59a52,52,0,0,1,4.67,7.42c1.94,3.81,2.35,10.85,1.21,15-1.19,4.32-3.05,7.23-7.8,8.27-2.76.61-7.59-.26-8.73-3.41-.48-1.33-.93-5.78-.06-6.14,1.6-.64,1,.91,1.42,1.39a16.16,16.16,0,0,0,1,2c3.43,7.88,11.9.11,7.67-3.86-1.86-1.76-4.42-1.48-6.68-1.88-2.89-.51-4.75-1.07-6.13-3.27-2-3.09-1.23-6.41,1.1-9.3,4-5,9.12-.89,13.07,1.48-.2-2.44-3.3-5.64-5-7.36-3-3.06-6.63-4.17-10.75-4.27a19.27,19.27,0,0,0-10.56,2.6,11.31,11.31,0,0,0-4.64,5.62c-.35.85-2,3.92-2,4.48,1.86.12,3.85-2.9,6-3.29a6.06,6.06,0,0,1,6.28,3.44c1.74,4.21.5,17.1-6.35,12.62-1.92-1.25-2.87-4.71-4-1.39-1.29,3.95,3.9,7.06-1.3,10.23-3.74,2.29-6.88-.46-7.51-4.44-.53-3.35,2-5.48,2-8.68-2.35.49-3.4,4.32-5.69,5.09s-3-1.22-4.41-2.49c-1.62-1.45-2.62-1.83-2.65-3.91,0,.42.82-2.13.81-2.06.25-1.54-.25-3,.39-4.58a9,9,0,0,1,1.53-2.38c3.92-5.16,7.11-1,11.62.77,1.41-2.11-1.5-6.31-2.89-7.68-2.2-2.19-6-3.09-8.94-3.8-6.8-1.65-12.71.62-15.48,7s1,1.84,4.9,3.52C120.79,161.27,121,166,118,169c-1.41,1.39-3.33,2-4.52,3.44-2.38,3-1.36,7.48,2.86,7.65,1.56.06,3-.3,3.63-2s-.69-2.25-.69-3.7c0-3.58,2.74-.72,3.5,1.41,2.28,6.37-7.34,8.36-11.41,6.5a14.62,14.62,0,0,1-7.3-19.08c1.37-3.05,3-6.64,5.42-9.06,1.21-1.24,3.38-2.35,4-4.05,1.38-3.71-2.33-.92-4.67-.4-6.08,1.36-9.26,3.29-14.14,7.69-3.77,3.41-8.81,8.13-9.52,13.39s6,10.3,8.74,4.17c.69-1.56-1.82-8.22,2.38-5,3.84,3,1.17,9.16-1.92,11.46-5.65,4.2-11.08-3.59-11.53-8.84-1-11.49,10.4-19.36,19.49-23.62,6.63-3.11,13.49-5,21.11-4.43,4.42.34,9.93,2,13.52,4.66C138,149.93,141.66,154.85,141.44,155.06Z" transform="translate(0 0)"/><path class="b" d="M244.56,110.47c-.95-4.33,2-9.92,4.66-13.52.71-1,5.62-4.67,5.84-4.45C246,85.29,244.45,79,246.57,68.33c.19-1,.85-3,1.68-3.52.58-.37,3.8-4.76,4.59-5.36a51,51,0,0,1,7.42-4.66c3.81-1.95,10.85-2.35,15-1.22,4.32,1.19,7.22,3,8.27,7.8.6,2.76-.26,7.59-3.41,8.73-1.33.49-5.79.93-6.14.06-.64-1.59.91-1,1.39-1.41a18.1,18.1,0,0,0,2-1c7.88-3.43.11-11.9-3.86-7.67-1.76,1.86-1.48,4.42-1.88,6.68-.51,2.89-1.07,4.75-3.27,6.13-3.09,2-6.41,1.23-9.3-1.1-5-4-.89-9.12,1.48-13.06-2.44.19-5.64,3.29-7.36,5-3.06,3-4.17,6.64-4.27,10.75A19.27,19.27,0,0,0,251.46,85a11.22,11.22,0,0,0,5.62,4.64c.85.35,3.92,2,4.48,2,.12-1.87-2.9-3.86-3.29-6a6.06,6.06,0,0,1,3.44-6.28c4.21-1.74,17.1-.5,12.62,6.35-1.25,1.92-4.71,2.87-1.39,4,3.95,1.29,7.06-3.89,10.23,1.3,2.29,3.74-.46,6.89-4.44,7.51-3.35.53-5.48-2-8.68-2,.49,2.34,4.32,3.4,5.09,5.68s-1.22,3-2.49,4.41c-1.45,1.62-1.83,2.62-3.91,2.65.42,0-2.13-.82-2.06-.81-1.54-.24-3,.25-4.58-.38a9.26,9.26,0,0,1-2.38-1.53c-5.17-3.93-1-7.12.77-11.63-2.11-1.4-6.31,1.51-7.69,2.89-2.18,2.2-3.08,6-3.79,8.95-1.65,6.79.62,12.7,7,15.47s1.84-1,3.51-4.9c1.78-4.13,6.54-4.34,9.49-1.38,1.39,1.41,1.95,3.34,3.44,4.52,3,2.38,7.48,1.36,7.65-2.85.06-1.57-.3-3-2-3.63s-2.25.68-3.7.68c-3.58,0-.72-2.73,1.41-3.5,6.37-2.28,8.36,7.34,6.49,11.41a14.6,14.6,0,0,1-19.07,7.3c-3-1.37-6.65-3-9.06-5.41-1.24-1.22-5.12-3.55-6.49-4.72C245.5,117.85,245.17,113.25,244.56,110.47Z" transform="translate(0 0)"/><path class="b" d="M244.78,73.53c.94,4.33-2,9.92-4.66,13.52-.71,1-5.62,4.67-5.84,4.45,9.06,7.21,10.6,13.51,8.49,24.17-.19,1-.86,3-1.68,3.52-.58.37-3.8,4.76-4.59,5.36a51.57,51.57,0,0,1-7.42,4.66c-3.81,1.95-10.85,2.35-15,1.22-4.32-1.19-7.22-3.05-8.26-7.8-.61-2.76.26-7.59,3.41-8.73,1.33-.49,5.78-.93,6.13-.06.65,1.59-.91,1-1.38,1.41a18.08,18.08,0,0,0-2,1c-7.87,3.43-.1,11.9,3.87,7.67,1.76-1.86,1.48-4.42,1.88-6.68.5-2.89,1.07-4.75,3.26-6.13,3.1-2,6.42-1.23,9.31,1.1,4.95,4,.88,9.12-1.48,13.06,2.43-.19,5.63-3.29,7.35-5a14.73,14.73,0,0,0,4.27-10.75A19.18,19.18,0,0,0,237.87,99a11.24,11.24,0,0,0-5.61-4.64c-.86-.35-3.92-2-4.48-2-.13,1.87,2.89,3.86,3.29,6a6.06,6.06,0,0,1-3.45,6.28c-4.2,1.74-17.09.5-12.61-6.35,1.25-1.92,4.7-2.87,1.39-4-4-1.29-7.06,3.89-10.23-1.3-2.29-3.74.46-6.89,4.43-7.51,3.35-.53,5.49,2,8.69,2-.49-2.34-4.32-3.4-5.09-5.68s1.22-3,2.48-4.41c1.46-1.62,1.84-2.62,3.91-2.65-.42,0,2.14.82,2.07.81,1.54.24,3-.25,4.58.38a9,9,0,0,1,2.37,1.53c5.17,3.93,1,7.12-.76,11.63,2.11,1.4,6.3-1.51,7.68-2.89,2.19-2.2,3.09-6,3.8-8.95,1.65-6.79-.63-12.7-7-15.47s-1.85,1-3.52,4.9c-1.77,4.13-6.54,4.34-9.48,1.38-1.4-1.41-2-3.34-3.45-4.52-3-2.38-7.47-1.36-7.64,2.85-.07,1.57.3,3,2,3.63s2.25-.68,3.71-.68c3.58,0,.71,2.73-1.41,3.5-6.38,2.28-8.37-7.34-6.5-11.41a14.6,14.6,0,0,1,19.07-7.3c3.06,1.37,6.65,3,9.07,5.41,1.24,1.22,5.11,3.55,6.48,4.72C243.83,66.15,244.17,70.75,244.78,73.53Z" transform="translate(0 0)"/><path class="b" d="M220.26,46.67c-2.7-.41-4.55-2-6.49-4-1-1-2.16-3-3.48-3.55s-3.25.78-3.87-.48,1.83-2.44,2.36-3.3c.79-1.28.84-2.89,1.25-4.28,2.27-7.63,10.37-12.28,6.86-21C215.9,7.66,213,7,212,5c-1.57-3.18,3.47-.93,5,.29,3.12,2.45,4.21,6.26,3.67,10.26-.08.62-1.79,4.2-1.49,4.72s3.78-.88,5.13-1c4.79-.49,11.12,1.45,15.53-1,2-1.09,1.59-.13.19-1.27-1.78-1.43-4.11-1.33-5.45-3.62C229.91,5.41,241,.91,246.75.23,258.12-1.12,271.38,3.45,278.42,13c3.17,4.29,5.22,8.21,5.56,13.52.24,3.62-2,15.27-7.87,10-2.34-2.1-.87-2.67,1.53-3,2.57-.38,2.77.22,3.94-2.3,1.79-3.84.1-8.82-3.76-10.44-7.22-3-17.7,1-21.54,6.9s-8.46,9.47-14.1,6.51c-3-1.6-5.05-4.53-4.33-8.16.19-1,3.14-6,2.94-6-1.79,0-4.11.84-6,1.13-2.88.45-5.67.23-8.56.44a12.55,12.55,0,0,0-9,4.22,13.14,13.14,0,0,0-2.8,12.4c.7,2.52,2.84,5.79,5.56,6.46,3.55.87,4.93-2.14,7.62-3.34l.19.8C227.86,45.78,223,47.09,220.26,46.67Z" transform="translate(0 0)"/></svg>
")
          round;
        </button>
      </div>
      <div class="preview-panel">
        <section id="default-example">
          <div id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-image-slice: 30;
}`,
        `#example-element {
  border-image-slice: 30 fill;
}`,
        `#example-element {
  border-image-slice: 44;
}`,
        `#example-element {
  border-image: url("data:image/svg+xml;base64,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 284 184"><defs><style>.a{fill:#eee;}.b{fill:#e66465;}</style></defs><title>border-florid</title><path class="a" d="M137.47,121.74a17.38,17.38,0,0,0-.62-5c-4.2,4.42-7.21,9.13-13.84,9.71-5.49.48-12-4.87-12.42-10.38-.32-4.69,2.22-9.87,5.5-13,1.19-1.12,4.52-2.4,4.59-4.24.12-3-1.47-1.39-3-1.51-5.84-.44-12.27-.59-13.28-7.74-.48-3.44-.7-10.9,1.91-13.64,2.34-2.46,8.57-3.13,11.64-2.46,1.84.41,7.58,3.58,9.25,1.49,1.29-1.62-2.16-8.16-2.32-10.39a11.64,11.64,0,0,1,1-6c2.13-4.67,8-6.45,13.15-5.39a11.85,11.85,0,0,1,8.37,6.64c1.41,2.88.72,6.39,2.11,9.17a30.5,30.5,0,0,0,2.64-2.82c1.65-1.78,3.24-3.73,5.5-4.74,3.49-1.55,6-.7,9.17.79,4.63,2.22,8.77,6.43,7.73,12.11-.65,3.54-6.26,10.09-9.81,11,5.84,1.79,11.49,1.28,14.31,7.76,1.85,4.26.89,11-1.71,14.78-2,2.85-5,5.2-8.5,4.66-2.29-.35-1.66-.68-3.52-1.68s-.17-.67-3.22-1.27a35.68,35.68,0,0,1-4.66-.78c.09,3.24,4.3,5.1,5.43,8,1.85,4.75-2.29,9.33-5.91,11.86-3,2.09-8.27,2.67-12,2.22-2.47-.3-2.52-.53-4.22-2.5C138.09,125.38,137.47,125.92,137.47,121.74Zm-4.82-27.51c2.52,3.78,4.66,7.28,9.64,6.69,4.59-.53,7.38-2.47,7.77-7.31.31-3.76-4.35-8.86-8-9.41C136.84,83.43,133.29,89.94,132.65,94.23Z" transform="translate(0 0)"/><path class="b" d="M56.14,42.19l.19-.8C59,42.59,60.4,45.6,64,44.73c2.72-.67,4.86-3.94,5.56-6.46a13.14,13.14,0,0,0-2.8-12.4,12.55,12.55,0,0,0-9-4.22c-2.89-.21-5.68,0-8.56-.44-1.85-.29-4.17-1.13-6-1.13-.2,0,2.75,5,2.94,6,.72,3.63-1.31,6.56-4.33,8.16-5.64,3-10.3-.7-14.1-6.51S13.4,17.76,6.18,20.78C2.32,22.4.63,27.38,2.42,31.22c1.17,2.52,1.37,1.92,3.94,2.3,2.4.36,3.87.93,1.53,3C2.05,41.79-.22,30.14,0,26.52.36,21.21,2.41,17.29,5.58,13c7-9.55,20.3-14.12,31.67-12.77C43,.91,54.09,5.41,49.44,13.3c-1.34,2.29-3.67,2.19-5.45,3.62-1.4,1.14-1.79.18.19,1.27,4.41,2.46,10.74.52,15.53,1,1.35.15,4.84,1.53,5.13,1s-1.41-4.1-1.49-4.72c-.54-4,.55-7.81,3.67-10.26,1.56-1.22,6.6-3.47,5-.29-1,2-4,2.7-4.94,5.16-3.51,8.69,4.59,13.34,6.86,21,.41,1.39.46,3,1.25,4.28.53.86,2.94,2.1,2.36,3.3s-2.68,0-3.87.48-2.53,2.56-3.48,3.55c-1.94,2-3.79,3.56-6.49,4S56.14,45.78,56.14,42.19Z" transform="translate(0 0)"/><path class="b" d="M142.56,28.94c-6.22,12.54-24.25,11.82-35.77,8.21-3.18-1-5.73-1.66-8.61-3.57-2.16-1.42-5.53-3-7.37-4.72-1.12-1-1.21-2.49-2.13-3.4s-2.12-1.13-3-2.13c-2.1-2.53-2.61-6.24-2.84-9.34-.34-4.63.28-9.38,5-11.78,5.94-3,12.32,3.19,9.83,9.25-1.61,3.93-8.17,4.14-5.62-.39.52-.93,2.11-.27,2.67-1.79a3.63,3.63,0,0,0-.7-2.91c-1.71-2.06-5.39-1.31-7.1.31S85.58,10,85.7,12.19c.75,12.63,17.13,23.56,29.16,23.56,0-.68-4.75-3.8-5.35-4.59a52,52,0,0,1-4.67-7.42c-1.94-3.81-2.35-10.85-1.21-15,1.19-4.32,3.05-7.23,7.8-8.27,2.76-.61,7.59.26,8.73,3.41.48,1.33.93,5.78.06,6.14-1.6.64-1-.91-1.42-1.39a16.16,16.16,0,0,0-1-2c-3.43-7.88-11.9-.11-7.67,3.86,1.86,1.76,4.42,1.48,6.68,1.88,2.89.51,4.75,1.07,6.13,3.27,2,3.09,1.23,6.41-1.1,9.3-4,5-9.12.89-13.07-1.48.2,2.44,3.3,5.64,5,7.36,3,3.06,6.63,4.17,10.75,4.27a19.27,19.27,0,0,0,10.56-2.6,11.31,11.31,0,0,0,4.64-5.62c.35-.85,2-3.92,2-4.48-1.86-.12-3.85,2.9-6,3.29a6.06,6.06,0,0,1-6.28-3.44c-1.74-4.21-.5-17.1,6.35-12.62,1.92,1.25,2.87,4.71,4,1.39C141,7.11,135.81,4,141,.83c3.74-2.29,6.88.46,7.51,4.44.53,3.35-2,5.48-2,8.68,2.35-.49,3.4-4.32,5.69-5.09s3,1.22,4.41,2.49c1.62,1.45,2.62,1.83,2.65,3.91,0-.42-.82,2.13-.81,2.06-.25,1.54.25,3-.39,4.58a9,9,0,0,1-1.53,2.38c-3.92,5.16-7.11,1-11.62-.77-1.41,2.11,1.5,6.31,2.89,7.68,2.2,2.19,6,3.09,8.94,3.8,6.8,1.65,12.71-.62,15.48-7s-1-1.84-4.9-3.52C163.21,22.73,163,18,166,15c1.41-1.39,3.33-1.95,4.52-3.44,2.38-3,1.36-7.48-2.86-7.65-1.56-.06-3,.3-3.63,2s.69,2.25.69,3.7c0,3.58-2.74.72-3.5-1.41-2.28-6.37,7.34-8.36,11.41-6.5a14.62,14.62,0,0,1,7.3,19.08c-1.37,3.05-3,6.64-5.42,9.06-1.21,1.24-3.38,2.35-4,4-1.38,3.71,2.33.92,4.67.4,6.08-1.36,9.26-3.29,14.14-7.69,3.77-3.41,8.81-8.13,9.52-13.39s-6-10.3-8.74-4.17c-.69,1.56,1.82,8.22-2.38,5-3.84-3-1.17-9.16,1.92-11.46,5.65-4.2,11.08,3.59,11.53,8.84,1,11.49-10.4,19.36-19.49,23.62-6.63,3.11-13.49,5-21.11,4.43-4.42-.34-9.93-2-13.52-4.66C146.05,34.07,142.34,29.15,142.56,28.94Z" transform="translate(0 0)"/><path class="b" d="M39.44,73.53c1,4.33-2,9.92-4.66,13.52-.71,1-5.62,4.67-5.84,4.45C38,98.71,39.55,105,37.43,115.67c-.19,1-.85,3-1.68,3.52-.58.37-3.8,4.76-4.59,5.36a51,51,0,0,1-7.42,4.66c-3.81,1.95-10.85,2.35-15,1.22-4.32-1.19-7.22-3.05-8.27-7.8-.6-2.76.26-7.59,3.41-8.73,1.33-.49,5.79-.93,6.14-.06.64,1.59-.91,1-1.39,1.41a18.1,18.1,0,0,0-2,1c-7.88,3.43-.11,11.9,3.86,7.67,1.76-1.86,1.48-4.42,1.88-6.68.51-2.89,1.07-4.75,3.27-6.13,3.09-2,6.41-1.23,9.3,1.1,5,4,.89,9.12-1.48,13.06,2.44-.19,5.64-3.29,7.36-5,3.06-3,4.17-6.64,4.27-10.75A19.27,19.27,0,0,0,32.54,99a11.22,11.22,0,0,0-5.62-4.64c-.85-.35-3.92-2-4.48-2-.12,1.87,2.9,3.86,3.29,6a6.06,6.06,0,0,1-3.44,6.28c-4.21,1.74-17.1.5-12.62-6.35,1.25-1.92,4.71-2.87,1.39-4C7.11,93.06,4,98.24.83,93.05c-2.29-3.74.46-6.89,4.44-7.51,3.35-.53,5.48,2,8.68,2-.49-2.34-4.32-3.4-5.09-5.68s1.22-3,2.49-4.41c1.45-1.62,1.83-2.62,3.91-2.65-.42,0,2.13.82,2.06.81,1.54.24,3-.25,4.58.38a9.26,9.26,0,0,1,2.38,1.53c5.17,3.93,1,7.12-.77,11.63,2.11,1.4,6.31-1.51,7.69-2.89,2.18-2.2,3.08-6,3.79-8.95,1.65-6.79-.62-12.7-7-15.47s-1.84,1-3.51,4.9C22.73,70.85,18,71.06,15,68.1c-1.39-1.41-1.95-3.34-3.44-4.52-3-2.38-7.48-1.36-7.65,2.85-.06,1.57.3,3,2,3.63s2.25-.68,3.7-.68c3.58,0,.72,2.73-1.41,3.5C1.84,75.16-.15,65.54,1.72,61.47a14.6,14.6,0,0,1,19.07-7.3c3.05,1.37,6.65,3,9.06,5.41,1.24,1.22,5.12,3.55,6.49,4.72C38.5,66.15,38.83,70.75,39.44,73.53Z" transform="translate(0 0)"/><path class="b" d="M39.22,110.47c-.94-4.33,2-9.92,4.66-13.52.71-1,5.62-4.67,5.84-4.45C40.66,85.29,39.12,79,41.23,68.33c.19-1,.86-3,1.68-3.52.58-.37,3.8-4.76,4.59-5.36a51.57,51.57,0,0,1,7.42-4.66c3.81-1.95,10.85-2.35,15-1.22,4.32,1.19,7.22,3,8.26,7.8.61,2.76-.26,7.59-3.41,8.73-1.33.49-5.78.93-6.13.06-.65-1.59.91-1,1.38-1.41a18.08,18.08,0,0,0,2-1c7.87-3.43.1-11.9-3.87-7.67-1.76,1.86-1.48,4.42-1.88,6.68-.5,2.89-1.07,4.75-3.26,6.13-3.1,2-6.42,1.23-9.31-1.1-5-4-.88-9.12,1.48-13.06-2.43.19-5.63,3.29-7.35,5a14.73,14.73,0,0,0-4.27,10.75A19.18,19.18,0,0,0,46.13,85a11.24,11.24,0,0,0,5.61,4.64c.86.35,3.92,2,4.48,2,.13-1.87-2.89-3.86-3.29-6a6.06,6.06,0,0,1,3.45-6.28c4.2-1.74,17.09-.5,12.61,6.35-1.25,1.92-4.7,2.87-1.39,4,4,1.29,7.06-3.89,10.23,1.3,2.29,3.74-.46,6.89-4.43,7.51-3.35.53-5.49-2-8.69-2,.49,2.34,4.32,3.4,5.09,5.68s-1.22,3-2.48,4.41c-1.46,1.62-1.84,2.62-3.91,2.65.42,0-2.14-.82-2.07-.81-1.54-.24-3,.25-4.58-.38a9,9,0,0,1-2.37-1.53c-5.17-3.93-1-7.12.76-11.63-2.11-1.4-6.3,1.51-7.68,2.89-2.19,2.2-3.09,6-3.8,8.95-1.65,6.79.63,12.7,7,15.47s1.85-1,3.52-4.9c1.77-4.13,6.54-4.34,9.48-1.38,1.4,1.41,2,3.34,3.45,4.52,3,2.38,7.47,1.36,7.64-2.85.07-1.57-.3-3-2-3.63s-2.25.68-3.71.68c-3.58,0-.71-2.73,1.41-3.5,6.38-2.28,8.37,7.34,6.5,11.41a14.6,14.6,0,0,1-19.07,7.3c-3.06-1.37-6.65-3-9.07-5.41-1.24-1.22-5.11-3.55-6.48-4.72C40.17,117.85,39.83,113.25,39.22,110.47Z" transform="translate(0 0)"/><path class="b" d="M63.74,137.33c2.7.41,4.55,1.95,6.49,4,1,1,2.16,3,3.48,3.55s3.25-.78,3.87.48-1.83,2.44-2.36,3.3c-.79,1.28-.84,2.89-1.25,4.28-2.27,7.63-10.37,12.28-6.86,21,1,2.46,3.93,3.13,4.94,5.16,1.57,3.18-3.47.93-5-.29-3.12-2.45-4.21-6.26-3.67-10.26.08-.62,1.79-4.2,1.49-4.72s-3.78.88-5.13,1c-4.79.49-11.12-1.45-15.53,1-2,1.09-1.59.13-.19,1.27,1.78,1.43,4.11,1.33,5.45,3.62,4.65,7.89-6.48,12.39-12.19,13.07C25.88,185.12,12.62,180.55,5.58,171,2.41,166.71.36,162.79,0,157.48c-.24-3.62,2-15.27,7.87-10,2.34,2.1.87,2.67-1.53,3-2.57.38-2.77-.22-3.94,2.3-1.79,3.84-.1,8.82,3.76,10.44,7.22,3,17.7-1,21.54-6.9s8.46-9.47,14.1-6.51c3,1.6,5,4.53,4.33,8.16-.19,1-3.14,5.95-2.94,5.95,1.79,0,4.11-.84,6-1.13,2.88-.45,5.67-.23,8.56-.44a12.55,12.55,0,0,0,9-4.22,13.14,13.14,0,0,0,2.8-12.4c-.7-2.52-2.84-5.79-5.56-6.46-3.55-.87-4.93,2.14-7.62,3.34l-.19-.8C56.14,138.22,61,136.91,63.74,137.33Z" transform="translate(0 0)"/><path class="b" d="M227.86,141.81l-.19.8c-2.69-1.2-4.07-4.21-7.62-3.34-2.72.67-4.86,3.94-5.56,6.46a13.14,13.14,0,0,0,2.8,12.4,12.55,12.55,0,0,0,9,4.22c2.89.21,5.68,0,8.56.44,1.85.29,4.17,1.13,6,1.13.2,0-2.75-5-2.94-5.95-.72-3.63,1.31-6.56,4.33-8.16,5.64-3,10.3.7,14.1,6.51s14.32,9.92,21.54,6.9c3.86-1.62,5.55-6.6,3.76-10.44-1.17-2.52-1.37-1.92-3.94-2.3-2.4-.36-3.87-.93-1.53-3,5.84-5.24,8.11,6.41,7.87,10-.34,5.31-2.39,9.23-5.56,13.52-7,9.55-20.3,14.12-31.67,12.77-5.71-.68-16.84-5.18-12.19-13.07,1.34-2.29,3.67-2.19,5.45-3.62,1.4-1.14,1.79-.18-.19-1.27-4.41-2.46-10.74-.52-15.53-1-1.35-.15-4.84-1.53-5.13-1s1.41,4.1,1.49,4.72c.54,4-.55,7.81-3.67,10.26-1.56,1.22-6.6,3.47-5,.29,1-2,4-2.7,4.94-5.16,3.51-8.69-4.59-13.34-6.86-21-.41-1.39-.46-3-1.25-4.28-.53-.86-2.94-2.1-2.36-3.3s2.68,0,3.87-.48,2.53-2.56,3.48-3.55c1.94-2,3.79-3.56,6.49-4S227.86,138.22,227.86,141.81Z" transform="translate(0 0)"/><path class="b" d="M141.44,155.06c6.22-12.54,24.25-11.82,35.77-8.21,3.18,1,5.73,1.66,8.61,3.57,2.16,1.42,5.53,3,7.37,4.72,1.12,1,1.21,2.49,2.13,3.4s2.12,1.13,3,2.13c2.1,2.53,2.61,6.24,2.84,9.34.34,4.63-.28,9.38-5.05,11.78-5.94,3-12.32-3.19-9.83-9.25,1.61-3.93,8.17-4.14,5.62.39-.52.93-2.11.27-2.67,1.79a3.63,3.63,0,0,0,.7,2.91c1.71,2.06,5.39,1.31,7.1-.31s1.44-3.36,1.32-5.51c-.75-12.63-17.13-23.56-29.16-23.56,0,.68,4.75,3.8,5.35,4.59a52,52,0,0,1,4.67,7.42c1.94,3.81,2.35,10.85,1.21,15-1.19,4.32-3.05,7.23-7.8,8.27-2.76.61-7.59-.26-8.73-3.41-.48-1.33-.93-5.78-.06-6.14,1.6-.64,1,.91,1.42,1.39a16.16,16.16,0,0,0,1,2c3.43,7.88,11.9.11,7.67-3.86-1.86-1.76-4.42-1.48-6.68-1.88-2.89-.51-4.75-1.07-6.13-3.27-2-3.09-1.23-6.41,1.1-9.3,4-5,9.12-.89,13.07,1.48-.2-2.44-3.3-5.64-5-7.36-3-3.06-6.63-4.17-10.75-4.27a19.27,19.27,0,0,0-10.56,2.6,11.31,11.31,0,0,0-4.64,5.62c-.35.85-2,3.92-2,4.48,1.86.12,3.85-2.9,6-3.29a6.06,6.06,0,0,1,6.28,3.44c1.74,4.21.5,17.1-6.35,12.62-1.92-1.25-2.87-4.71-4-1.39-1.29,3.95,3.9,7.06-1.3,10.23-3.74,2.29-6.88-.46-7.51-4.44-.53-3.35,2-5.48,2-8.68-2.35.49-3.4,4.32-5.69,5.09s-3-1.22-4.41-2.49c-1.62-1.45-2.62-1.83-2.65-3.91,0,.42.82-2.13.81-2.06.25-1.54-.25-3,.39-4.58a9,9,0,0,1,1.53-2.38c3.92-5.16,7.11-1,11.62.77,1.41-2.11-1.5-6.31-2.89-7.68-2.2-2.19-6-3.09-8.94-3.8-6.8-1.65-12.71.62-15.48,7s1,1.84,4.9,3.52C120.79,161.27,121,166,118,169c-1.41,1.39-3.33,2-4.52,3.44-2.38,3-1.36,7.48,2.86,7.65,1.56.06,3-.3,3.63-2s-.69-2.25-.69-3.7c0-3.58,2.74-.72,3.5,1.41,2.28,6.37-7.34,8.36-11.41,6.5a14.62,14.62,0,0,1-7.3-19.08c1.37-3.05,3-6.64,5.42-9.06,1.21-1.24,3.38-2.35,4-4.05,1.38-3.71-2.33-.92-4.67-.4-6.08,1.36-9.26,3.29-14.14,7.69-3.77,3.41-8.81,8.13-9.52,13.39s6,10.3,8.74,4.17c.69-1.56-1.82-8.22,2.38-5,3.84,3,1.17,9.16-1.92,11.46-5.65,4.2-11.08-3.59-11.53-8.84-1-11.49,10.4-19.36,19.49-23.62,6.63-3.11,13.49-5,21.11-4.43,4.42.34,9.93,2,13.52,4.66C138,149.93,141.66,154.85,141.44,155.06Z" transform="translate(0 0)"/><path class="b" d="M244.56,110.47c-.95-4.33,2-9.92,4.66-13.52.71-1,5.62-4.67,5.84-4.45C246,85.29,244.45,79,246.57,68.33c.19-1,.85-3,1.68-3.52.58-.37,3.8-4.76,4.59-5.36a51,51,0,0,1,7.42-4.66c3.81-1.95,10.85-2.35,15-1.22,4.32,1.19,7.22,3,8.27,7.8.6,2.76-.26,7.59-3.41,8.73-1.33.49-5.79.93-6.14.06-.64-1.59.91-1,1.39-1.41a18.1,18.1,0,0,0,2-1c7.88-3.43.11-11.9-3.86-7.67-1.76,1.86-1.48,4.42-1.88,6.68-.51,2.89-1.07,4.75-3.27,6.13-3.09,2-6.41,1.23-9.3-1.1-5-4-.89-9.12,1.48-13.06-2.44.19-5.64,3.29-7.36,5-3.06,3-4.17,6.64-4.27,10.75A19.27,19.27,0,0,0,251.46,85a11.22,11.22,0,0,0,5.62,4.64c.85.35,3.92,2,4.48,2,.12-1.87-2.9-3.86-3.29-6a6.06,6.06,0,0,1,3.44-6.28c4.21-1.74,17.1-.5,12.62,6.35-1.25,1.92-4.71,2.87-1.39,4,3.95,1.29,7.06-3.89,10.23,1.3,2.29,3.74-.46,6.89-4.44,7.51-3.35.53-5.48-2-8.68-2,.49,2.34,4.32,3.4,5.09,5.68s-1.22,3-2.49,4.41c-1.45,1.62-1.83,2.62-3.91,2.65.42,0-2.13-.82-2.06-.81-1.54-.24-3,.25-4.58-.38a9.26,9.26,0,0,1-2.38-1.53c-5.17-3.93-1-7.12.77-11.63-2.11-1.4-6.31,1.51-7.69,2.89-2.18,2.2-3.08,6-3.79,8.95-1.65,6.79.62,12.7,7,15.47s1.84-1,3.51-4.9c1.78-4.13,6.54-4.34,9.49-1.38,1.39,1.41,1.95,3.34,3.44,4.52,3,2.38,7.48,1.36,7.65-2.85.06-1.57-.3-3-2-3.63s-2.25.68-3.7.68c-3.58,0-.72-2.73,1.41-3.5,6.37-2.28,8.36,7.34,6.49,11.41a14.6,14.6,0,0,1-19.07,7.3c-3-1.37-6.65-3-9.06-5.41-1.24-1.22-5.12-3.55-6.49-4.72C245.5,117.85,245.17,113.25,244.56,110.47Z" transform="translate(0 0)"/><path class="b" d="M244.78,73.53c.94,4.33-2,9.92-4.66,13.52-.71,1-5.62,4.67-5.84,4.45,9.06,7.21,10.6,13.51,8.49,24.17-.19,1-.86,3-1.68,3.52-.58.37-3.8,4.76-4.59,5.36a51.57,51.57,0,0,1-7.42,4.66c-3.81,1.95-10.85,2.35-15,1.22-4.32-1.19-7.22-3.05-8.26-7.8-.61-2.76.26-7.59,3.41-8.73,1.33-.49,5.78-.93,6.13-.06.65,1.59-.91,1-1.38,1.41a18.08,18.08,0,0,0-2,1c-7.87,3.43-.1,11.9,3.87,7.67,1.76-1.86,1.48-4.42,1.88-6.68.5-2.89,1.07-4.75,3.26-6.13,3.1-2,6.42-1.23,9.31,1.1,4.95,4,.88,9.12-1.48,13.06,2.43-.19,5.63-3.29,7.35-5a14.73,14.73,0,0,0,4.27-10.75A19.18,19.18,0,0,0,237.87,99a11.24,11.24,0,0,0-5.61-4.64c-.86-.35-3.92-2-4.48-2-.13,1.87,2.89,3.86,3.29,6a6.06,6.06,0,0,1-3.45,6.28c-4.2,1.74-17.09.5-12.61-6.35,1.25-1.92,4.7-2.87,1.39-4-4-1.29-7.06,3.89-10.23-1.3-2.29-3.74.46-6.89,4.43-7.51,3.35-.53,5.49,2,8.69,2-.49-2.34-4.32-3.4-5.09-5.68s1.22-3,2.48-4.41c1.46-1.62,1.84-2.62,3.91-2.65-.42,0,2.14.82,2.07.81,1.54.24,3-.25,4.58.38a9,9,0,0,1,2.37,1.53c5.17,3.93,1,7.12-.76,11.63,2.11,1.4,6.3-1.51,7.68-2.89,2.19-2.2,3.09-6,3.8-8.95,1.65-6.79-.63-12.7-7-15.47s-1.85,1-3.52,4.9c-1.77,4.13-6.54,4.34-9.48,1.38-1.4-1.41-2-3.34-3.45-4.52-3-2.38-7.47-1.36-7.64,2.85-.07,1.57.3,3,2,3.63s2.25-.68,3.71-.68c3.58,0,.71,2.73-1.41,3.5-6.38,2.28-8.37-7.34-6.5-11.41a14.6,14.6,0,0,1,19.07-7.3c3.06,1.37,6.65,3,9.07,5.41,1.24,1.22,5.11,3.55,6.48,4.72C243.83,66.15,244.17,70.75,244.78,73.53Z" transform="translate(0 0)"/><path class="b" d="M220.26,46.67c-2.7-.41-4.55-2-6.49-4-1-1-2.16-3-3.48-3.55s-3.25.78-3.87-.48,1.83-2.44,2.36-3.3c.79-1.28.84-2.89,1.25-4.28,2.27-7.63,10.37-12.28,6.86-21C215.9,7.66,213,7,212,5c-1.57-3.18,3.47-.93,5,.29,3.12,2.45,4.21,6.26,3.67,10.26-.08.62-1.79,4.2-1.49,4.72s3.78-.88,5.13-1c4.79-.49,11.12,1.45,15.53-1,2-1.09,1.59-.13.19-1.27-1.78-1.43-4.11-1.33-5.45-3.62C229.91,5.41,241,.91,246.75.23,258.12-1.12,271.38,3.45,278.42,13c3.17,4.29,5.22,8.21,5.56,13.52.24,3.62-2,15.27-7.87,10-2.34-2.1-.87-2.67,1.53-3,2.57-.38,2.77.22,3.94-2.3,1.79-3.84.1-8.82-3.76-10.44-7.22-3-17.7,1-21.54,6.9s-8.46,9.47-14.1,6.51c-3-1.6-5.05-4.53-4.33-8.16.19-1,3.14-6,2.94-6-1.79,0-4.11.84-6,1.13-2.88.45-5.67.23-8.56.44a12.55,12.55,0,0,0-9,4.22,13.14,13.14,0,0,0-2.8,12.4c.7,2.52,2.84,5.79,5.56,6.46,3.55.87,4.93-2.14,7.62-3.34l.19.8C227.86,45.78,223,47.09,220.26,46.67Z" transform="translate(0 0)"/></svg>
") round;
border-image-slice: calc(50 / 184 * 100%) calc(80 / 284 * 100%) fill;
border-image-width: 30px 48px;
}`,
      ];

      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-image-source 交互演示（MDN）

指定 border-image 使用的图片源。

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-image-source 属性演示 - MDN 示例</title>
    <meta name="description" content="演示border（image-source 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;
      }
      #example-element {
        width: 80%;
        height: 80%;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 50px;
        background: #fff3d4;
        color: #000;
        border: 30px solid;
        border-image: url("data:image/png;base64,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")
          30 round;
        font-size: 1.2em;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">
          border-image-source:
          url("data:image/png;base64,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");
        </button>
        <button class="snippet-btn" data-index="1">
          border-image-source:
          url("data:image/png;base64,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");
        </button>
        <button class="snippet-btn" data-index="2">border-image-source: repeating-linear-gradient(</button>
        <button class="snippet-btn" data-index="3">border-image-source: none;</button>
      </div>
      <div class="preview-panel">
        <section id="default-example">
          <div id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-image-source: url("data:image/png;base64,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");
}`,
        `#example-element {
  border-image-source: url("data:image/png;base64,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");
}`,
        `#example-element {
  border-image-source: repeating-linear-gradient(
  45deg,
  transparent,
  #4d9f0c 20px
);
}`,
        `#example-element {
  border-image-source: none;
}`,
      ];

      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-image-width 交互演示（MDN）

设置 border-image 边框图片的宽度。

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-image-width 属性演示 - MDN 示例</title>
    <meta name="description" content="演示border（image-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;
      }
      #example-element {
        width: 80%;
        height: 80%;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 50px;
        background: #fff3d4;
        color: #000;
        border: 30px solid;
        border-image: url("data:image/png;base64,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")
          30 round;
        font-size: 1.2em;
      }
    </style>
  </head>
  <body>
    <div class="demo-layout">
      <div class="snippet-panel">
        <button class="snippet-btn active" data-index="0">border-image-width: 30px;</button>
        <button class="snippet-btn" data-index="1">border-image-width: 15px 40px;</button>
        <button class="snippet-btn" data-index="2">border-image-width: 2.6rem;</button>
        <button class="snippet-btn" data-index="3">border-image-width: 20% 8%;</button>
      </div>
      <div class="preview-panel">
        <section id="default-example">
          <div id="example-element">This is a box with a border around it.</div>
        </section>
      </div>
    </div>
    <script>
      const snippets = [
        `#example-element {
  border-image-width: 30px;
}`,
        `#example-element {
  border-image-width: 15px 40px;
}`,
        `#example-element {
  border-image-width: 2.6rem;
}`,
        `#example-element {
  border-image-width: 20% 8%;
}`,
      ];

      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>

backdrop-filter 毛玻璃效果

css

/* 基础毛玻璃 */
.glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px); /* Safari */
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
}

/* 强毛玻璃 */
.glass-strong {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
}

/* 深色毛玻璃 */
.glass-dark {
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: white;
}

关键注意：backdrop-filter 要求元素必须有半透明背景（rgba 或 hsla），否则看不到效果。Safari 需要 -webkit- 前缀。

最佳实践

1. 阴影动画性能优化

css

/* ❌ 避免：直接动画 box-shadow（每帧触发 Paint） */
.bad { animation: shadow-pulse 1s infinite; }
@keyframes shadow-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(0, 0, 0, 0.2); }
  50% { box-shadow: 0 0 40px rgba(0, 0, 0, 0.4); }
}

/* ✅ 推荐：用伪元素 + opacity 动画（仅触发 Composite） */
.good { position: relative; }
.good::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.4);
  opacity: 0;
  animation: fade-shadow 1s infinite;
  pointer-events: none;
}
@keyframes fade-shadow {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

2. 使用 will-change 提示浏览器

css

/* 对需要动画的阴影使用 will-change */
.animated-shadow {
  will-change: box-shadow;
  transition: box-shadow 0.3s;
}

/* 动画结束后移除 will-change 释放内存 */
.animated-shadow:not(:hover) {
  will-change: auto;
}

3. 圆角溢出问题

css

/* ❌ 子元素溢出圆角 */
.parent { border-radius: 20px; }
.child { /* 超出圆角区域 */ }

/* ✅ 添加 overflow: hidden */
.parent {
  border-radius: 20px;
  overflow: hidden;
}

4. 阴影被裁切

css

/* ❌ 父元素 overflow: hidden 裁切了阴影 */
.parent { overflow: hidden; }
.child { box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2); }

/* ✅ 方案一：使用 filter: drop-shadow（不受 overflow 限制） */
.child { filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.2)); }

/* ✅ 方案二：给父元素添加 padding */
.parent {
  overflow: hidden;
  padding: 20px; /* 为阴影留出空间 */
}

5. box-shadow vs drop-shadow 选择

特性	`box-shadow`	`filter: drop-shadow()`
投影依据	矩形盒模型轮廓	实际可见轮廓（含透明区域）
透明图片	整个矩形区域有阴影	只在非透明部分有阴影
inset 支持	✅	❌
多层阴影	✅	❌（可叠加多个 filter）
扩展参数	✅ spread	❌
性能	仅重绘	触发滤镜计算，略高

css

/* 透明 PNG 图标 → 用 drop-shadow */
.icon { filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3)); }

/* 普通卡片 → 用 box-shadow */
.card { box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1); }

6. 响应式圆角

css

/* 使用 CSS clamp() 实现响应式圆角 */
.responsive-radius {
  border-radius: clamp(4px, 2vw, 16px);
}

/* 使用 CSS 变量统一管理 */
:root {
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 999px;
}

常见问题

Q1: 为什么圆角失效？

子元素溢出圆角区域，需要添加 overflow: hidden。

Q2: 为什么阴影被裁切？

父元素的 overflow: hidden 会裁切阴影。解决方案：使用 filter: drop-shadow 或给父元素留 padding。

Q3: 如何创建单边阴影？

css

.bottom-shadow { box-shadow: 0 4px 8px -2px rgba(0, 0, 0, 0.2); }
.top-shadow { box-shadow: 0 -4px 8px -2px rgba(0, 0, 0, 0.2); }

利用负 spread 值抵消偏移方向的阴影。

Q4: border-image 和 border-radius 能同时使用吗？

不能。 border-image 会覆盖 border-radius 的效果。如需圆角渐变边框，使用双层嵌套方案：外层设置渐变背景 + 圆角，内层设置白色背景 + 较小圆角。

Q5: backdrop-filter 不生效？

检查三点：① 元素背景必须半透明 ② 添加 -webkit- 前缀兼容 Safari ③ 使用 @supports 检测浏览器支持。

Q6: 圆角百分比 vs 固定值如何选择？

固定值适合精确控制和固定尺寸元素；百分比适合响应式设计和需要保持圆角比例的场景。创建正圆/椭圆必须使用百分比 50%。

参考资源

浏览器兼容性

特性	Chrome	Firefox	Safari	Edge	IE
`border-radius`	5+	4+	5+	12+	9+
`box-shadow`	10+	4+	5.1+	12+	9+
`text-shadow`	2+	3.5+	1.1+	12+	10+
`border-image`	16+	15+	6+	12+	❌
`backdrop-filter`	76+	103+	9+	17+	❌
`filter: drop-shadow`	53+	35+	9.1+	12+	❌