pet diagnostics
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Build a **single self-contained `index.html`** file. No build step, no framework, no external JS, no local image files. All CSS in one `` block in ``; one small `` before ``. Match every number below ……（完整源码请在站内查看）
Build a **single self-contained `index.html`** file. No build step, no framework, no external JS, no local image files. All CSS in one `` block in ``; one small `` before ``. Match every number below ……（完整源码请在站内查看）