楼梯上的遮挡式电影感肖像

Create a moody, grainy analog-film style portrait of exactly one young person sitting on outdoor stone stairs in front of a dark building entrance. The subject has long {argument name="hair color" default="black"} hair falling over the shoulders, wears an oversized dark navy zip jacket and a pastel tie-dye T-shirt with pale pink and blue tones, and sits casually with arms folded near the knees. Place exactly one large opaque square censor block over the entire face, centered from forehead to chin, in a warm brown gradient that hides all facial features. Show exactly three broad gray stone stair treads behind and beneath the subject, with a dark doorway and weathered wall details in the background. Use a square 1:1 crop, close medium framing from upper thighs to above the head, soft dim natural light, muted colors, shallow depth of field, subtle underexposure, visible film grain, and a candid street-photography feeling. The setting should feel like {argument name="setting mood" default="quiet urban evening"}; keep the pose relaxed and introspective, with no text, no logos, and no extra people.

创作一张忧郁、带有颗粒感的模拟胶片风格肖像，画面中仅有一位年轻人坐在深色建筑入口前的户外石阶上。主体留着 {argument name="hair color" default="黑色"} 的长发，头发垂在肩头，身穿超大号深海军蓝拉链夹克和淡粉蓝配色的扎染 T 恤，双臂交叉放在膝盖附近，姿态随意。在整个面部放置一个巨大的不透明方形遮挡块，从前额到下巴居中覆盖，采用暖棕色渐变，完全遮住所有面部特征。主体身后和下方显示三级宽大的灰色石阶，背景为深色门洞和风化的墙面细节。采用 1:1 正方形构图，从大腿上方到头顶的近中景取景，使用柔和昏暗的自然光、低饱和度色彩、浅景深、轻微的欠曝效果、可见的胶片颗粒，营造出一种纪实街拍的氛围。场景应呈现出 {argument name="setting mood" default="安静的城市夜晚"} 的感觉；保持姿势放松且内敛，画面中不要包含任何文字、标志或额外人物。