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feat: add AI and Backend evolution history with interactive demos, and refine Frontend evolution demo

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sanbuphy
2026-01-18 10:24:35 +08:00
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docs/.vitepress/theme/components/appendix/web-basics/CssSelectorsDemo.vue
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<template>
<div class="selectors-demo">
<div class="hint">👇 鼠标悬停在左侧 CSS 代码上，看看右侧 HTML 谁会被选中</div>
<div class="comparison">
<!-- Left: CSS Rules -->
<div class="column css-col">
<div class="col-title">CSS (样式表)</div>
<div class="rules-list">
<div
class="rule-item"
:class="{ active: activeType === 'tag' }"
@mouseenter="activeType = 'tag'"
@mouseleave="activeType = null"
>
<div class="selector">p</div>
<div class="block">{ color: #333; }</div>
<div class="explanation">
<span class="badge tag">标签选择器</span>
直接写标签名，选中所有 <code>&lt;p&gt;</code>
</div>
</div>
<div
class="rule-item"
:class="{ active: activeType === 'class' }"
@mouseenter="activeType = 'class'"
@mouseleave="activeType = null"
>
<div class="selector">.card</div>
<div class="block">{ background: white; }</div>
<div class="explanation">
<span class="badge class">类选择器</span>
以 <code>.</code> 开头，选中所有 <code>class="card"</code>
</div>
</div>
<div
class="rule-item"
:class="{ active: activeType === 'id' }"
@mouseenter="activeType = 'id'"
@mouseleave="activeType = null"
>
<div class="selector">#submit-btn</div>
<div class="block">{ font-weight: bold; }</div>
<div class="explanation">
<span class="badge id">ID 选择器</span>
以 <code>#</code> 开头，选中唯一 <code>id="submit-btn"</code>
</div>
</div>
</div>
</div>
<!-- Center: Connector -->
<div class="connector">
<div class="line-path" :class="activeType"></div>
<div class="icon">🔗</div>
</div>
<!-- Right: HTML Structure -->
<div class="column html-col">
<div class="col-title">HTML (结构)</div>
<div class="code-view">
<div
class="html-line"
:class="{ highlight: activeType === 'tag' }"
>
&lt;p&gt;我是普通段落&lt;/p&gt;
</div>
<div
class="html-line"
:class="{ highlight: activeType === 'class' }"
>
&lt;div <span class="attr">class="card"</span>&gt;
</div>
<div
class="html-line indent"
:class="{ highlight: activeType === 'tag' || activeType === 'class' }"
>
&lt;p&gt;我是卡片里的段落&lt;/p&gt;
</div>
<div
class="html-line"
:class="{ highlight: activeType === 'class' }"
>
&lt;/div&gt;
</div>
<div
class="html-line"
:class="{ highlight: activeType === 'id' }"
>
&lt;button <span class="attr">id="submit-btn"</span>&gt;提交&lt;/button&gt;
</div>
</div>
</div>
</div>
</div>
</template>
<script setup>
import { ref } from 'vue'
const activeType = ref(null)
</script>
<style scoped>
.selectors-demo {
border: 1px solid var(--vp-c-divider);
border-radius: 8px;
background: var(--vp-c-bg-soft);
padding: 20px;
margin: 20px 0;
font-family: var(--vp-font-family-mono);
font-size: 13px;
}
.hint {
text-align: center;
color: var(--vp-c-text-2);
margin-bottom: 16px;
font-family: var(--vp-font-family-base);
font-size: 14px;
}
.comparison {
display: flex;
gap: 10px;
align-items: stretch;
}
.column {
flex: 1;
display: flex;
flex-direction: column;
}
.col-title {
font-weight: bold;
margin-bottom: 10px;
text-align: center;
color: var(--vp-c-text-1);
}
/* CSS Column */
.rule-item {
background: var(--vp-c-bg);
border: 1px solid var(--vp-c-divider);
margin-bottom: 10px;
padding: 10px;
border-radius: 6px;
cursor: pointer;
transition: all 0.2s;
position: relative;
}
.rule-item:hover, .rule-item.active {
border-color: var(--vp-c-brand);
background: var(--vp-c-brand-dimm);
transform: translateX(5px);
}
.selector {
color: #d73a49; /* Red-ish for selector */
font-weight: bold;
}
.rule-item:nth-child(2) .selector { color: #6f42c1; } /* Purple for class */
.rule-item:nth-child(3) .selector { color: #005cc5; } /* Blue for ID */
.explanation {
margin-top: 6px;
font-size: 12px;
color: var(--vp-c-text-2);
display: flex;
align-items: center;
gap: 6px;
}
.badge {
font-size: 10px;
padding: 2px 4px;
border-radius: 4px;
color: white;
}
.badge.tag { background: #d73a49; }
.badge.class { background: #6f42c1; }
.badge.id { background: #005cc5; }
/* HTML Column */
.code-view {
background: #1e1e1e;
color: #abb2bf;
padding: 15px;
border-radius: 6px;
height: 100%;
display: flex;
flex-direction: column;
justify-content: center;
}
.html-line {
padding: 4px 8px;
border-radius: 4px;
transition: all 0.2s;
border: 1px solid transparent;
}
.html-line.indent {
margin-left: 20px;
}
.html-line.highlight {
background: rgba(255, 255, 255, 0.15);
border-color: rgba(255, 255, 255, 0.3);
color: white;
text-shadow: 0 0 5px rgba(255,255,255,0.5);
}
.attr {
color: #98c379;
}
/* Connector */
.connector {
display: flex;
align-items: center;
justify-content: center;
width: 40px;
position: relative;
}
.icon {
font-size: 20px;
z-index: 2;
background: var(--vp-c-bg-soft);
}
@media (max-width: 600px) {
.comparison {
flex-direction: column;
}
.rule-item:hover, .rule-item.active {
transform: translateY(2px);
}
.connector {
width: 100%;
height: 30px;
}
}
</style>