地下通道回声展

制作「地下通道回声展」活动海报，采用 1:1 画布，面向普通社区参与者。围绕“地下通道瓷砖把脚步声切成方格，回声强弱改变标题字重”组织全部叙事，材料厚度与接触面清楚可见，不能靠降低透明度融合。画面结构使用偏心竖构图，次级内容贴近对应证据而不散落，让“地下通道瓷砖把脚步声切成方格，回声强弱改变标题字重”保持第一视觉中心。准确写出主标题「地下通道回声展」、副句「从一件旧物开始共同叙事」、地点「桥下声场」和提示「携带有线耳机」，所有汉字完整。除分贝刻度、线缆弧线和吸音毡外不添加装饰。材料按蓝晒声谱叠加压凹波纹制作，纸面受压与墨色变化清楚，使用靛青、竹青、旧纸白与朱砂。带遮光罩的顶灯作为唯一主光，接触影较硬，远端影逐渐变软，所有投影方向一致。四边保留 5% 裁切安全区，小字在最终尺寸下可读；不展示墙面样机、手持效果、二维码、商标、名人、现成角色、HUD 或发亮厚字，保持「地下通道回声展」的公共活动语气。

Produce a 1:1 event poster for “Underpass Echo Exhibition,” aimed at ordinary community participants. Organize the narrative around underpass tiles dividing footsteps into squares while echo intensity changes the weight of the headline, exposing material thickness and the contact surface instead of reducing opacity. Build the image with an asymmetric vertical composition, keeping supporting information beside its evidence. Render the exact headline “Underpass Echo Exhibition,” secondary line “Begin a shared story with one old object,” venue “the acoustic space beneath the bridge,” and note “bring wired headphones.” Keep every character complete. Introduce no decoration beyond decibel marks, cable arcs, and acoustic felt. Construct the print in a cyanotype sound spectrum over debossed wave ridges, with visible pressure and ink change, colored through indigo, bamboo green, aged-paper white, and vermilion. Use a hooded overhead lamp as the only key light. Contact shadows are harder, distant shadows soften, and every projection shares one direction. Keep a five-percent trim-safe margin and preserve small-copy legibility. Show no wall mockup, handheld view, QR code, trademark, public figure, existing character, HUD, or luminous dimensional type. For the final rendering, build the hero as a practical paper-and-object assembly: underpass tiles dividing footsteps into squares while echo intensity changes the weight of the headline. Allow one partial crop on a secondary edge, but keep the transformed area complete and easy to inspect. Keep the information block visibly connected to the hero through alignment rather than arrows. Final art direction: editorial poster design with a disciplined grid and material-aware composition. Use this controlled palette as the dominant visual system: #F2EBDD, #243447, #C65D48, #D6A14B; preserve believable local material colors within it. Preserve the requested text hierarchy and wording as part of the design, but do not invent extra slogans, pseudo-text, logos, 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.