余温便当保温套购买证据主图

输出一张「余温便当保温套」，使展示「余温便当保温套」在合乎现实使用中的购买证据无需额外解释即可读懂。
把「余温便当保温套」放进它真正会被使用的环境，主角约占构图 55%，手部只完成一次与切面显示相变层，晚归四小时后的饭盒温度与普通布袋建立对照直接相关的动作
切面显示相变层，晚归四小时后的饭盒温度与普通布袋汇成对照
让「余温便当保温套」的操作前状态、耐磨织物外层、相变保温芯与可清洁内衬的受力或连接位置、操作后的可判断变化同时出现；局部放大只解释切面显示相变层，晚归四小时后的饭盒温度与普通布袋建立对照涉及的构造，无法从本次动作观察到的性能不要视觉化。
构图采用三段纵向叙事。
文字层级以「余温便当保温套」为首，辅助标签控制在两行内，不遮挡主角证据。
细节从准确表现耐磨织物外层、相变保温芯与可清洁内衬的接缝、厚度、开合与接触阴影开始，空间保留留白将信息层级拉开，照明采用侧后方轮廓光与正面弱补光。让「余温便当保温套」配合醒目标题配不超过两行的标签，背景收敛为只保留必要环境线索的背景，整体使用可信的商业产品摄影质感。补充控制：贴近支撑面的柔影，边缘高光只出现在合理角度；以尺寸差突出决定性对象，焦点由材料连接点引向最终形态，局部强调不超过主对象面积的十分之一。
禁止夸大功效、错误握持、漂浮零件、无关赠品、虚构认证与摆拍式手势及任何现成商业资产；检查五指、比例、接触阴影和空间尺度，用于「余温便当保温套」。
成片为单张 1:1，不附过程页或变体。

Output one “Yuwen Thermal Lunch Sleeve” image that makes showing purchase-relevant evidence for “Yuwen Thermal Lunch Sleeve” in real use understandable without external explanation. Situate Yuwen Thermal Lunch Sleeve in the environment where it would genuinely be used. Let the product occupy roughly fifty-five percent of the finished picture as one hand performs a single task tied to its defining function for Yuwen Thermal Lunch Sleeve. Depict the purchase-defining function of Yuwen Thermal Lunch Sleeve by a visible operation involving abrasion-resistant outer fabric, phase-change thermal core, and washable lining, keeping the operated part and the resolved form in one line of sight. Preserve the pre-use state of Yuwen Thermal Lunch Sleeve, the contact or load point in abrasion-resistant outer fabric, phase-change thermal core, and washable lining, and the observable after-state together. Restrict its cutaway or macro inset to construction involved in the demonstrated operation; omit any performance that this subject-specific action cannot reveal for Yuwen Thermal Lunch Sleeve. Frame Yuwen Thermal Lunch Sleeve as three-stage vertical narrative, seen via a realistic 35–55mm commercial view placed near the height of operation. Build the type hierarchy around “余温便当保温套,” keeping support labels within two lines and away from the central evidence. Maintain a unified color temperature within dusty rose, tea brown, pale apricot, and dark green, using local value contrast to expose the functional parts of abrasion-resistant outer fabric, phase-change thermal core, and washable lining. Begin the detail treatment of Yuwen Thermal Lunch Sleeve by requiring that you reproduce the seams, thickness, opening behavior, and contact shadows of abrasion-resistant outer fabric, phase-change thermal core, and washable lining accurately. Maintain negative space separating information levels, apply rear-side rim light alongside gentle frontal fill, pair the image with prominent headline and labels no longer than two lines, and reduce the background to a background carrying only necessary environmental cues for a credible commercial-product finish. Additional control: soft shadows close to supporting surfaces; edge highlights appear only at plausible angles. Use scale contrast emphasizing the decisive object, ensure focus leads from the physical matter joint to the finished state, and let the accent occupy less than one tenth of the subject area. Forbid exaggerated claims, incorrect handling, floating components, irrelevant gifts, fabricated certification, or posed gestures and existing commercial assets; inspect five fingers, proportion, contact shadow, and spatial scale for Yuwen Thermal Lunch Sleeve. Return one 1:1 final image without variants or a process sheet. Final art direction: evidence-led commercial product photography with honest materials and restrained studio light. Use this controlled palette as the dominant visual system: #F2EFE7, #22262A, #7B9B8A, #C86B42; preserve believable local material colors within it. Keep any text absent or minimal unless the source brief explicitly requires it; never add logos, signatures, or watermarks. Keep one unmistakable primary subject or information route and one readable visual action. Use disciplined negative space and avoid default perfect symmetry. Physical credibility is mandatory: correct gravity, contact shadows, material thickness, tool weight, joint loading, fabric tension, liquid direction, reflections, scale, and occlusion. Create an original visual with no resemblance to a public figure, copyrighted character, existing campaign, or living artist signature style. No unrelated decorative icons, floating objects, duplicated limbs, plastic gloss, waxy skin, synthetic collage artifacts, or AI watermarks. Return exactly one finished image composed for 1:1; no variants, process sheet, split panels, mockup frame, or contact sheet.