测试文章 15 - 现代 CSS 特性概览

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.card-container {
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  container-type: inline-size;
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}
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@container (min-width: 400px) {
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  .card {
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    display: grid;
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    grid-template-columns: 200px 1fr;
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  }
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}

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@layer reset, base, components, utilities;
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@layer reset {
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  * { margin: 0; padding: 0; }
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}
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@layer components {
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  .button { padding: 10px 20px; }
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}
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@layer utilities {
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  .p-0 { padding: 0; } /* 优先级更高 */
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}

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/* 选择包含图片的卡片 */
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.card:has(img) {
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  display: grid;
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  grid-template-columns: 200px 1fr;
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}
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/* 选择被勾选的复选框后的标签 */
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input:checked + label:has(+ .content) {
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  font-weight: bold;
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}

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/* OKLCH 颜色空间 */
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.accent {
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  color: oklch(70% 0.2 250);
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}
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/* color-mix 混合颜色 */
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.mixed {
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  color: color-mix(in srgb, red 50%, blue 50%);
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}
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/* 相对颜色 */
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.darker {
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  color: hsl(from var(--color) h s calc(l - 20%));
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}

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/* 简单的页面过渡 */
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::view-transition-old(root) {
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  animation: fade-out 0.5s ease;
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}
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::view-transition-new(root) {
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  animation: fade-in 0.5s ease;
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}
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@keyframes fade-out {
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  to { opacity: 0; }
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}
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@keyframes fade-in {
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  from { opacity: 0; }
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}