結案感謝卡（瑞士編輯排版風）

prompt

Design a bold thank-you card that a creative agency sends when delivering a finished project, square 14x14cm. Swiss editorial style: stark off-white background, strict modular grid, an oversized 'THANK YOU' set in a tight black neo-grotesque Swiss-style sans-serif filling the top two-thirds, with the final U knocked out in {brand_color}. Lower grid row: a one-line note 'It was a pleasure building your {project_type}.', then {studio_name}, {signature_name} and {contact_handle} aligned to three columns with hairline rules between them. Add small registration-mark and page-folio details in the corners for a print-shop insider feel. Flat, high-contrast, no imagery, no shadows — typography is the only hero.