Engineering Graph Pad

The engineer's computation pad is one of the quietest icons of working drafting culture: a pale "eye-ease" green sheet with a 5×5 grid printed on the reverse so it reads as a soft show-through rather than a hard line. For forty years it carried hand calculations, sketches, and title-block notes.

This system rebuilds that pad as an interface. Everything sits on the tinted green stock, lettering stays monospace and engineered, and the grid lives underfoot as a faint ruled ground — never decoration, always reference.

工程计算本（engineer's computation pad）是制图工作文化里最安静的一件标志物： 淡淡的"护眼绿"纸张，方格印在背面，所以正面只透出一层柔和的网格，而不是 生硬的线条。从 1950 到 1990 年代，国家牌（National Brand）和 TOPS 的这种本子 承载了无数手算、草图和标题栏注记，是北美工程师案头的常备物。

这套系统把那张纸重做成界面：一切都铺在带绿调的纸面上，字形保持等宽、带着 工程绘图的克制感，方格沉在最底层，像一层淡淡的标尺——它永远是参照，不是装饰。