Minimalist Festive Greeting Illustration

Based on {argument name="Theme" default="Good luck on the Gaokao"}, generate a flat illustration with the ceremonial feel of a blessing card: leave generous breathing room at the top of the image; in the upper-left corner, use a small-sized signature, a short horizontal line, and a seal/stamp to form a quiet opening; in the middle, use a small amount of handwritten well-wishes or a thematic slogan as an emotional turning point; at the bottom, build a main information area that combines the look of a printed stamp/seal with a ticket-style border — the border should have an uneven line weight and edges with a hand-stamped, ragged texture. Inside the main information area, the eye should first read an oversized, rough, dry-brushed thematic glyph or symbol, spread out at background scale, partly obscured by the central thematic symbol; the central symbol should be rendered with clean line art and flat color blocks, in an upright, front-facing, stable pose, with a small amount of thematically derived detail, forming a focal point that feels blessed and empowered. Around it, arrange small icons, brief inscribed text, round seals, and fine arced symbols, so the information unfolds layer by layer like the stamps and marks on a handmade blessing card, while keeping a rhythmic balance of density and openness. Draw the color palette from the theme's own material, cultural signals, and mood: use a large area of a bright, clear, clean base color for the "paper" and "air," with the structural lines and main glyph using a clear thematically derived accent color, concentrated in proportion but not muddy; render the central subject with a more complete range of light and dark tonal layers and a small amount of supporting color to distinguish the information layers, using only small-area dot-like color for the detail marks/seals. The overall mood should be bright, clean, solemn yet approachable, with a texture of fine paper fiber and slight print-registration misalignment — avoid a heavy aged look, dingy gray tones, or a smoky feel.