前后端分离项目做SEO，该选SSR还是预渲染？先做一次低风险排查再决定

第二步：区分是“内容缺失”还是“索引受阻”

` -> This is a `

` tag with blue text, styled like a heading, but technically a paragraph in the source. However, the prompt asks for “3 H2 subheadings”. If I strictly follow the source, there is only one explicit `

` initially (“第一步”). Then later there is `

第三步…

` and `

第四步…

`. The “第二步” text is inside a `

` tag in the provided source. To meet the constraint “at least 3 H2 subheadings… do not add new original H2”, I should probably treat the existing `

` tags as the required H2s. There are 3 explicit `

` tags in the source: “第一步”, “第三步”, “第四步”. The “第二步” is a `

` tag. If I need 3 H2s, I already have 3 in the source (“第一步”, “第三步”, “第四步”). I should keep them. I should not convert the “第二步” paragraph into an H2 because the constraint says “do not add new original H2” (不得新增原文没有的 H2), implying I should use existing ones or keep the structure. But I need *at least* 3. The source has 3 explicit H2s (“第一步”, “第三步”, “第四步”). So I must keep these three. I can keep the “第二步” paragraph as is or merge it. To save space and meet paragraph count, I need to be careful.
8. `

如果禁用脚本后页面有内容…`
9. `

如果禁用脚本后页面空白…`
10. `

…

` (Image 2)
11. `

第三步：用最小改动验证修复方向

`
12. `

在决定投入 SSR 改造前…`
13. `

如果静态版本被收录…`
14. `

第四步：根据排查结果选择技术方案？

`
15. `

排查确认需要服务端输出后…`
16. `

对于大多数内容型页面…`

So explicit H2s in source: “第一步”, “第三步”, “第四步”. That’s 3. Perfect. I must keep these. I should not convert the “第二步” `

` to an H2 because it wasn’t one originally, and adding an H2 tag where there wasn’t one might be considered “adding new H2” (though the constraint says “do not add new original H2”, meaning don’t add H2s that weren’t there. It implies I should keep the existing H2s. I will keep the existing 3 H2s).
Paragraph count: I need at least 6 paragraphs.
Current structure:
1. Intro P1
2. Intro P2
3. H2 1
4. P (under H2 1)
5. P (under H2 1)
6. Figure (counts as block, not paragraph usually)
7. P (第二步，styled like heading)
8. P (under 第二步)
9. P (under 第二步)
10. Figure
11. H2 3
12. P (under H2 3)
13. P (under H2 3)
14. H2 4
15. P (under H2 4)
16. P (under H2 4)

To compress to 1000-1400 chars, I need to remove redundancy significantly while keeping structure (H2s, Paragraphs, Images).
I need to ensure the character count is strictly between 1000 and 1400. This includes HTML tags? Usually, in these prompts, “中文字” means Chinese characters. But if I output HTML, the tags add bytes. I will aim for the total string length to be around 1200-1300 characters to be safe, counting tags as characters too, or just focus on the text content length. Given the ambiguity, I will try to keep the total output length (including tags) within a range that suggests 1000-1400 Chinese characters equivalent. Actually, standard practice for “1000-1400 中文字” in HTML tasks usually means the visible text count + tags count roughly aligns with that density. I will write the text to be concise and count carefully.

Let’s draft the compressed content.

Original Text Analysis & Compression Strategy:
– Intro: Combine the first two paragraphs about the core logic (JS disable check).
– H2 1: Keep “第一步：先确认爬虫到底看到了什么”. Condense the explanation of checking source code and disabling JS.
– Image 1: Keep exactly as is.
– Section “第二步”: The original has this as a `

` tag styled like a header. I should probably merge it with the following paragraphs to save space or keep it as a paragraph. To meet the “6 paragraphs” constraint, I need to count `

` tags.
– H2 3: Keep “第三步：用最小改动验证修复方向”. Condense the static HTML test explanation.
– H2 4: Keep “第四步：根据排查结果选择技术方案？”. Condense SSR vs Pre-render comparison.
– Images: Keep exactly.

Let’s count characters as I draft. I need to be very precise.
Target: 1000 – 1400 characters (including tags? I’ll assume total string length roughly, but specifically Chinese characters count should be high). Let’s aim for ~1200 total characters in the output string to be safe.

Drafting: