Infographic / Edu Visual - Hot Air Balloon Coloring Page
一张简单的黑白可打印涂色页，画面中是一个孩子从云朵和鸟群间的热气球里挥手。
Create a clean black-and-white coloring-book line drawing on a wide horizontal white canvas. Center the scene on a whimsical hot air balloon floating in the sky, drawn with smooth hand-inked outlines and no color or shading except sparse hatch marks. The balloon envelope is large and rounded with vertical stitched panel lines and a curved bunting garland wrapped across its lower half; the garland has exactly 7 triangular pennant flags with alternating plain and dotted fill textures. Below the balloon, attach a small woven basket with two suspension ropes, and place one smiling child inside, wearing a brimmed hat and scarf, with one arm raised in a friendly wave. Surround the balloon with exactly 4 puffy cartoon clouds: one small cloud in the upper left, one large cloud in the lower left, one medium cloud at mid-right, and one large cloud in the lower right. Add exactly 3 simple flying bird silhouettes shaped like loose curved V marks: two small birds to the left of the balloon and one to the right. Keep the composition airy with lots of blank white space, rounded cute proportions, child-friendly line art, consistent medium-weight black strokes, minimal interior detail, no background horizon, no text, no color, and no watermark. The main subject should feel like {argument name="theme" default="a cheerful child riding a hot air balloon"} in a simple printable coloring page style. 在宽幅横向白色画布上创作一张干净的黑白涂色书线条画。画面中心为一个漂浮在天空中的奇趣热气球，采用平滑的手绘墨线勾勒，除少量阴影排线外，不含任何颜色或渲染。气球主体圆润硕大，带有垂直缝合线，下半部分缠绕着弧形彩旗装饰；彩旗包含 7 面三角形旗帜，采用纯色与点状填充交替纹理。气球下方连接着一个编织篮筐，由两根绳索悬挂，篮筐内坐着一名戴着帽檐帽和围巾、正举手友好挥舞的微笑儿童。气球周围环绕着 4 朵蓬松的卡通云：左上方一朵小云，左下方一朵大云，中右侧一朵中云，右下方一朵大云。添加 3 个简单的飞鸟剪影，形状如同松散的弧形“V”字：气球左侧两只，右侧一只。保持构图通透，留有大量空白，比例圆润可爱，线条适合儿童，笔触粗细均匀，内部细节极简，无背景地平线，无文字，无颜色，无水印。主体应呈现为 {argument name="theme" default="一个快乐的孩子乘坐热气球"} 的简单可打印涂色页风格。