HTML mobile reading comparison / HTML 窄屏阅读对照

native-export.html is the existing unchanged Doc2X PDF-to-HTML export.
embedded-copy.html is the existing local derivative that embeds its one JPEG.
mobile-reading.html is the new local reading copy of embedded-copy.html.
Only mobile-reading.html adds a visible copy notice, a main landmark, a named table-scroll wrapper, a descriptive browser title and reading CSS. Remove that wrapper from its main content to recover the original embedded-copy body exactly. All ten MathJax/SVG/MathML expressions, original table markup and embedded JPEG bytes remain unchanged.

native-export.html 是既有原生下载；embedded-copy.html 是既有内嵌图片副本；mobile-reading.html 是本轮本地阅读副本。新副本增加来源提示、main、可聚焦的表格滚动容器、浏览器标题及样式。移除新增表格容器后，main 正文可逐字还原为原内嵌副本的 body。十处数学表达、表格标签与内嵌 JPEG 字节均保留。

The original and embedded copies can overflow horizontally at narrow widths. The mobile copy keeps a 512px minimum table within a focusable region. At 312px, the region is 278px wide and scrolls 234px to expose the last column. On desktop it expands with the reading column. Keyboard ArrowRight was used to reach the end in the tested browser.
窄屏时让表格在区域内滚动，不隐藏数据列，也不把整页缩小。实测312px视口下区域宽278px，滚动234px后最后一列可见。桌面随阅读栏展开；键盘右方向键已验证。

Source PDF and chart.jpg are retained for checking content. The known missing line above the parsed chart is not restored by changing styles. The native file's external image still depends on its URL; only the local embedded and mobile copies contain the JPEG bytes.
原稿 source.pdf 与 chart.jpg 用于核对内容；改变样式没有补回此前解析图像顶部缺失的文字。原生HTML仍依赖外部图片地址，本地两个副本才含有图片字节。

Open the files in a browser and compare all rows, equations, image and caption. The tested cache-disabled loopback reload of mobile-reading.html requested only the HTML document and its embedded data image; this is not a fully disconnected browser or every-platform guarantee. No script, extra font file or new product export was introduced. Printing, arbitrary HTML and physical-device touch behavior were not tested.
冷加载检查使用本机HTTP服务并关闭缓存，仅观察到HTML与内嵌data图片；没有切断整台浏览器网络，也不保证任意平台。没有新增脚本、字体文件或产品导出。未验证打印、任意HTML或实体手机触摸。

reading-layout.css is the exact stylesheet appended to the mobile copy. It is an example for this file, not a general repair tool. checks.json records source invariants, actual viewport measurements, resource events and keyboard scrolling.
reading-layout.css 是副本追加的完整样式，仅为本例说明；不是通用修复器。checks.json 包含源文件不变量、视口测量、资源请求和键盘滚动记录。
