logo-design（标志设计）

Logo Design Skill

Transform brand identity into distinctive, memorable visual marks. Every logo tells a story — the skill ensures that story is grounded in research, typographic craft, and strategic thinking, then delivered as production-ready SVG.

Output format: SVG vector files, automatically opened in the browser for instant preview.

Phase 1: Discovery & Brief

Before any design work, you must gather context from the user. Ask for anything not already provided.

Required Information

1. Brand name — the exact text to appear in the logo
2. Industry / domain — what the brand does (drives visual metaphors and tone)
3. Brand story / core values — the idea, spirit, or promise the brand wants to communicate
4. Target audience — who the primary users/customers are (age, taste, cultural context)

Recommended Information

1. Competitors — key competitor names (for differentiation)
2. Color preferences — specific colors, or a mood direction (bold, elegant, playful, tech-forward, etc.)
3. Style preference (if not specified, recommend based on analysis):

- Wordmark — pure typography (e.g., Google, FedEx) - Lettermark / Monogram — initials (e.g., IBM, HBO, LV) - Icon + Text — symbol paired with brand name (e.g., Apple, Nike) - Abstract Mark — geometric / abstract symbol (e.g., Pepsi, Airbnb) - Emblem — text enclosed within a shape (e.g., Starbucks, Harley-Davidson) - Combination Mark — flexible pairing of icon and text

1. Exclusions — styles, colors, or elements the user explicitly does NOT want

Phase 2: Market Research & Inspiration

You must conduct web research before designing. This grounds the work in current reality rather than generic assumptions.

What to Research

1. Industry logo trends — current mainstream and emerging styles in the brand's sector
2. Competitor logo analysis — visual strategies of named competitors; identify patterns to differentiate from
3. Typography inspiration — typefaces and lettering styles that match the brand's tone
4. Color trends — how brands in the same space use color; opportunities to stand out

How to Research

Run these searches using WebSearch (adapt keywords to the specific brand):

"{industry} logo design trends {current_year}"
"{competitor_name} logo"
"{style_keyword} logo inspiration"
"{industry} brand color palette trends"

Compile findings into a brief summary and share key insights with the user before proceeding. Highlight:

• Dominant visual patterns in the industry (what to leverage or avoid)
• Gaps / white-space opportunities (underused styles or colors)
• Notable references worth drawing from

Phase 3: Name & Letterform Analysis

This is the creative engine of the skill. You must perform a deep typographic analysis of the brand name before sketching concepts. The analysis directly informs which logo styles will be most effective.

3.1 Individual Letter Anatomy

Classify each letter in the brand name:

3.2 Letter Combination Analysis

Examine how adjacent letters interact — this is where hidden design opportunities live:

• Ligature potential — which letter pairs can naturally merge?

- Classic pairs: fi, fl, ft, tt, ff, Th, AV, VA, AT, LT, TA - Look for shared strokes, overlapping geometry, or smooth joining points

• Negative-space discoveries — does the combination of letters hide a secondary shape?

- Iconic examples: FedEx (arrow between E and x), Spartan Golf (golfer in negative space), Toblerone (bear in mountain) - Systematically check: between each pair of adjacent letters, what shape does the counter-space form?

• Letter-to-metaphor mapping — connect letterforms to brand-relevant visual concepts: Letter Possible Visual Metaphors A Mountain peak, tent, upward arrow, compass point B Butterfly wings, infinity (rotated), headphones C Moon crescent, embrace, cup/container D Sail, half-sun, shield E Stacked layers, equalizer bars, comb G Spinning disc, spiral, speech bubble H Bridge, ladder, building I Pillar, candle, exclamation, person K Key, branch fork, signal L Corner, angle, boot, shelf M/W Mountain range, waves, crown, heartbeat N Lightning bolt, staircase, zigzag O Eye, target, globe, sun, ring, lens P Flag, pin, thought bubble Q Magnifying glass, balloon, key R Running figure, flag waving S Path, river, snake, yin-yang flow T Hammer, cross, antenna, tree V Checkmark, wings, victory, valley X Crossroads, multiply, chromosome Y Fork in road, tree, chalice Z Lightning, zigzag path Always adapt metaphors to the brand's actual domain — a "V" for a travel brand suggests a bird in flight; for a fintech brand it suggests a checkmark of verification.

3.3 Visual Wordplay & Hidden Meaning

Push beyond surface-level design:

• Visual puns — embed a secondary image or meaning within the letterforms (e.g., the Amazon smile/arrow from A to Z)
• Negative space — create a second layer of meaning in the space between or within letters
• Semantic connections — explore homophones, word roots, abbreviation meanings, and cultural associations of the brand name
• Number/letter ambiguity — if any letter resembles a number or symbol, consider whether that creates a meaningful connection

3.4 Analysis Output

Compile and present to the user:

1. The 2-3 most promising letter combinations or individual letters with creative potential
2. 2-3 strongest visual metaphor directions (tied to brand values)
3. Recommended logo style(s) based on letterform characteristics
4. Any hidden meaning or wordplay opportunities discovered

Wait for user confirmation on the direction before proceeding to design.

Phase 4: Design Philosophy & Style Direction

4.1 Core Design Principles

Every concept must satisfy all four:

• Simplicity & Recognition — works at 16x16 favicon AND on a billboard; if you can't describe it in one sentence, simplify
• Uniqueness & Memorability — the viewer should remember it after a single 3-second glance
• Strategic Extensibility — supports the brand's future growth, not just today's product
• Storytelling — every element has a reason; the logo communicates the brand's essence without words

4.2 Style Directions

Select the most appropriate direction(s) based on the brief and letter analysis:

Modern Minimalist

Strip to essentials. Clean lines, geometric shapes, generous whitespace. Power through restraint. Technique: grid-based construction, mathematical precision, optical alignment.

Retro / Classic

Draw from vintage aesthetics — hand-lettering, badges, textures — but filter through a contemporary lens. Suits brands seeking heritage, craft, and authenticity.

Abstract / Geometric

Express the brand through pure form — circles, triangles, spirals, tessellations. Ideal when the brand transcends a single product or geography. Technique: golden ratio construction, Fibonacci spirals, modular grids.

Hand-drawn / Illustrative

Human warmth through organic linework. Use SVG paths with subtle irregularities to simulate hand-crafted feel. Suits creative, artisanal, or personality-driven brands.

Geometric Construction (Grid-based)

Build the logo on a mathematical grid — golden ratio, circular grids, or modular systems (like the Apple, Twitter/X, or Pepsi logos). Every curve and proportion is derived from the grid, yielding a mark that feels inevitable rather than arbitrary.

Emblem / Crest

Text enclosed within a symbol — shield, circle, badge, seal. Conveys tradition, authority, and prestige. Requires careful balance between enclosure and content.

Phase 5: Color Strategy

5.1 Color Psychology Reference

5.2 Palette Rules

• 1 primary + 1-2 accent colors maximum; a strong logo works in a single color
• Prioritize differentiation within the industry — if every competitor uses blue, consider the strategic value of not using blue
• Ensure sufficient contrast for readability on both light and dark backgrounds
• Verify the palette reproduces well across media: screen (RGB), print (CMYK intent), single-color (monochrome)
• Always produce a monochrome (black/white) version — it is the true test of a logo's structural strength

5.3 Color Application in SVG

• Define colors as CSS custom properties in <style> for easy theming: <style>:root {--brand-primary: #2563EB; --brand-accent: #F59E0B; --brand-dark: #1E293B;} </style>
• Use currentColor for elements that should inherit the parent's text color
• For monochrome versions, use a single fill color or currentColor throughout

Phase 6: Typography & Lettering

6.1 Typeface Strategy

6.2 Typographic Refinement

• Letter-spacing: optically adjust per character pair, not a uniform value — critical for wordmarks
• Stroke weight: ensure visual consistency at all scales; thin strokes may vanish at small sizes
• Corner treatment: rounded corners convey warmth; sharp corners convey precision
• Baseline alignment: when combining icon and text, align to optical center, not mathematical center
• Custom modifications: consider cutting, extending, connecting, or reshaping individual letterforms to create a unique logotype

6.3 Font Implementation in SVG

• Preferred: convert text to SVG <path> for the final logo — eliminates font-loading dependencies and ensures pixel-perfect rendering everywhere
• When using live text (for editability), import Google Fonts via @import in <style> and always specify a fallback stack
• For wordmarks and lettermarks, path conversion is strongly recommended

Phase 7: SVG Implementation Standards

7.1 File Structure

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 {width} {height}"
     role="img" aria-label="{Brand Name} Logo">
  <title>{Brand Name} Logo — {Variant Description}</title>
  <desc>Brief description of the logo design for accessibility.</desc>
  <defs>
    <!-- Gradients, clip paths, masks -->
  </defs>
  <style>
    /* CSS custom properties, font imports */
  </style>
  <!-- Logo geometry -->
</svg>

7.2 Technical Requirements

• Always use viewBox for scalability; do NOT hardcode width/height on the root <svg> (or set them to responsive values like 100%)
• Keep markup clean — minimize <g> nesting and avoid unnecessary transform attributes
• Use semantic element names and id attributes for maintainability
• Optimize <path> data — remove redundant control points, simplify curves, use shorthand commands (e.g., h, v, z)
• Prefer basic shapes (<circle>, <rect>, <ellipse>, <polygon>, <line>) over complex paths when they achieve the same result
• Ensure all colors are defined in one place (CSS variables or a single <style> block)

7.3 Quality Checklist

Before delivering each SVG, verify:

• Renders correctly at 16x16 (favicon), 64x64 (app icon), and 512+ (hero size)
• No visual artifacts at any scale
• Text is either converted to paths or has proper font fallbacks
• viewBox is set and no fixed dimensions on root
• Accessibility attributes present (<title>, aria-label, role="img")
• File is reasonably compact (no bloated path data)

7.4 Prohibitions

• No <image> tags embedding raster bitmaps
• No complex filter effects (<filter>, feGaussianBlur, feTurbulence) — they degrade at small sizes and increase file weight
• No overly detailed illustrations — logos must reduce to simple, recognizable forms
• No fonts without fallbacks
• No generic clip-art aesthetics — every logo must feel intentionally crafted for this specific brand

Phase 8: Delivery

8.1 Default Deliverables: 3 Distinct Concepts

Each concept explores a fundamentally different direction:

Each concept must be a separate SVG file.

8.2 File Naming Convention

logos/{brand}-concept-a-{style}.svg    # e.g. logos/acme-concept-a-wordmark.svg
logos/{brand}-concept-b-{style}.svg    # e.g. logos/acme-concept-b-abstract.svg
logos/{brand}-concept-c-{style}.svg    # e.g. logos/acme-concept-c-emblem.svg

8.3 Output Workflow

1. Create a logos/ directory in the current working directory
2. Write each SVG file to logos/
3. Open each SVG in the browser using open (macOS) for immediate visual preview
4. Present each concept to the user with:

- Design rationale — why this direction, what story it tells - Letter analysis connection — how the name analysis informed this specific design - Recommended use cases — where this style works best (digital, print, merch, etc.) - Color palette — hex values and the reasoning behind the choices

Phase 9: Iteration & Refinement

9.1 Feedback Collection

After presenting the 3 concepts, ask:

• Which concept resonates most (or which elements from multiple concepts to combine)?
• What needs adjustment — color, proportion, weight, symbol, typography?
• Does the overall feel match the brand's personality?

9.2 Iterative Refinement (2-3 Rounds)

• Iterate rapidly — SVG is code, so changes are precise and fast
• Each round: produce 2-3 variations of the chosen direction
• Progressively narrow toward the final mark
• Open updated SVGs in the browser after each round for side-by-side comparison

9.3 Final Delivery (After User Approval)

Once the user confirms the final design, provide:

1. Full-color version — the primary brand logo
2. Monochrome version — single-color (black) for maximum versatility
3. Reversed version — white/light version for dark backgrounds
4. Usage notes:

- Minimum recommended display size - Clear-space guidelines (safe area around the logo) - Color values (hex, RGB) - Brief do's and don'ts

Workflow Summary

Discovery → Research → Letter Analysis → [User Checkpoint]
  → Design Direction → Color & Type → 3 SVG Concepts
  → Browser Preview → [User Feedback]
  → Iterate (2-3 rounds) → Final Delivery

Communicate with the user at every checkpoint. Never design in isolation — validate direction before investing in execution. The best logos emerge from dialogue, not from a single pass.