Father's Day parent-child silhouette soft-focus light and shadow poster

Generate a vertical 9:16 Father's Day themed poster, theme is "[Main Title]". The background is [Seasonal Atmosphere], overall color tone is [Primary Color 1], [Primary Color 2], [Accent Color], with soft-focus light and shadow, airiness, slight grain, and premium negative space. The image needs warmth, quietness, companionship, and a sense of memory; not a cheap holiday promotion style. The main subject is a silhouette interaction scene of father and child: [Specific Action, e.g., father holding child's hand walking / father pushing child on a bike / father carrying child on his back / father tying child's shoelaces]. The figures only show outlines, no facial features, focus on expressing fatherly love, companionship, protection and growth. Complete layout: At top, enlarge a large Chinese handwritten title "[Main Title]". Next to the title, add small English "Father's Day". On the left, add vertical Chinese short sentence "[Vertical Copy]". In the blank middle area, add an emotional copy line: "[Main Copy]". At bottom, enlarge a large English serif title "HAPPY FATHER'S DAY". At bottom, add date "06/21" and small Chinese "Happy Father's Day". Overall style: Father's Day poster, parent-child silhouette, summer light and shadow, soft-focus photography, solar term poster, premium magazine layout, warm and healing, low-saturation colors, Eastern negative space. Requirements: Chinese text clear and accurate, no garbled text, no Logo, no watermark, no QR code, no cartoon, no promotional template feel.