“牛奶”是使用 FontVibe AI 创作的激光切割文字效果。粗壮无衬线大写字母从暖色桦木上激光切出，切口边缘焦黑、木纹清晰，凸立在深色胡桃木板上，琥珀色侧光。

Precision fabrication aesthetic: text exists as physical cut material — not rendered, not painted. The laser kerf is the only boundary: mathematically exact edges, zero roughness. MATERIAL SURFACE RULES: — Wood: warm grain on letter face (birch honey or dark walnut); charred dark seam along every kerf edge; cross-grain cross-section at cut face. Gentle warm transmission through thin sections. — Acrylic: glassy-smooth kerf edges scatter light as luminous halos — frosted emits soft white-blue edge glow; clear creates prismatic edge-light. Face stays matte or polished. — Metal: bright machined cut face against brushed exterior. Raking light reveals mechanical precision and directional grain. — Paper/Organic: bone-clean cut edges casting hairline shadows on backing. Maximum filigree detail preserved. FABRICATION LAWS (all materials): — Enclosed counters (O,D,B,P,R,A) retained by structural bridge connections — thin material tabs turned into design features. — Material thickness always visible as dimensional depth: each letter is a physical slab. — Negative space is real air or backing material showing through. — No added outlines, glow effects, or drop shadows — the kerf edge is the only boundary. FORBIDDEN: graphic fills, smooth gradient fills on letter faces, extruded 3D depth. When no specific material is defined by the font: default lighting — warm amber side light raking from low-left, deep warm shadow on right and behind, dark warm-brown craft-studio background. '牛奶' fabricated as a physical laser-cut sign from thick pale birch plywood, resting against a matte warm-cream ceramic tile backing. The letter faces carry fine honey-colored birch grain with subtle natural growth lines; every laser kerf has a narrow espresso-char seam and sharply defined cross-grain cut walls. The plywood slab thickness is clearly visible along the exposed cut faces, with precise hairline contact shadows where the material meets the tiled backing. Enclosed internal spaces are held by slender structural bridge tabs, treated as intentional fabrication details with clean geometric joins. Low amber side light rakes across the wood from the lower left, catching the machined cut faces and revealing the directional grain while producing deep warm shadows through the open negative spaces. A few softly blurred milk-white ceramic objects and a folded natural linen napkin sit beyond the focal plane, their rounded surfaces reflecting a faint cream highlight. Dark walnut tabletop edges fall into soft brown shadow. No printed ink, no painted fills, no added outline, no digital glow: only real birch material, exact laser-cut boundaries, charred kerf edges, and measurable slab depth.