Build a full-screen hero landing page for a creative agency called "Mainframe" using React, TypeScript, Vite, and Tailwind CSS. Here is every detail: --- FONTS Load two fonts in `index.html` via these stylesheet links: - Heading: `https://db.onlinewebfonts.com/c/5ac3fe7c6abd2f62067f266d89671492?family=HelveticaNowDisplay-Medium` - Body: `https://db.onlinewebfonts.com/c/1aa3377e489837a26d019bba501e779d?family=HelveticaNowDisplayW01-Rg` In `index.css`, define CSS variables: ```css :root { --font-heading: 'HelveticaNowDisplay-Medium', 'Helvetica Neue', Arial, sans-serif; --font-body: 'HelveticaNowDisplayW01-Rg', 'Helvetica Neue', Arial, sans-serif; } body { font-family: var(--font-body); } ``` The entire page uses `var(--font-body)` except the logo text which uses `var(--font-heading)`. --- BACKGROUND VIDEO (mouse-scrub controlled) - A full-screen `` element is `position: fixed; inset: 0; …
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Prompt
Build a full-screen hero landing page for a creative agency called "Mainframe" using React, TypeScript, Vite, and Tailwind CSS. Here is every detail:
---
FONTS
Load two fonts in `index.html` via these stylesheet links:
- Heading: `https://db.onlinewebfonts.com/c/5ac3fe7c6abd2f62067f266d89671492?family=HelveticaNowDisplay-Medium`
- Body: `https://db.onlinewebfonts.com/c/1aa3377e489837a26d019bba501e779d?family=HelveticaNowDisplayW01-Rg`
In `index.css`, define CSS variables:
```css
:root {
--font-heading: 'HelveticaNowDisplay-Medium', 'Helvetica Neue', Arial, sans-serif;
--font-body: 'HelveticaNowDisplayW01-Rg', 'Helvetica Neue', Arial, sans-serif;
}
body {
font-family: var(--font-body);
}
```
The entire page uses `var(--font-body)` except the logo text which uses `var(--font-heading)`.
---
BACKGROUND VIDEO (mouse-scrub controlled)
- A full-screen `` element is `position: fixed; inset: 0; z-index: 0; object-fit: cover; object-position: 70% center;`.
- Video source URL: `https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260530_042513_df96a13b-6155-4f6e-8b93-c9dee66fba08.mp4`
- The video is `muted`, `playsInline`, `preload="auto"`. It does NOT autoplay.
- The video scrubs forward/backward based on horizontal mouse movement. Use a `mousemove` event listener on `window`. Track `prevX`, compute `delta = currentX - prevX`, convert to a time offset: `(delta / window.innerWidth) SENSITIVITY video.duration` where `SENSITIVITY = 0.8`. Clamp `targetTime` between 0 and `video.duration`. Use `video.currentTime` to seek, and an `onSeeked` handler to queue the next seek if `targetTime` has moved, preventing seek-flooding.
---
**NAVBAR (fixed, z-index: 10)**
- Fixed to top, full width. Padding: `px-5 sm:px-8 py-4 sm:py-5`. Flex row, `justify-between`, `items-center`.
- **Logo (left):** Flex row with `gap-3`. Text "Mainframe(R)" (use the registered trademark symbol) at `text-[21px] sm:text-[26px]`, `tracking-tight`, black, using `var(--font-heading)`. Beside it, a decorative asterisk character `✳︎` at `text-[25px] sm:text-[30px]`, black, `select-none`, `letter-spacing: -0.02em`.
- **Desktop nav links (center, hidden below md):** Flex row, `text-[23px]`, black. Links: "Labs", "Studio", "Openings", "Shop" separated by commas rendered as `, `. Each link has `hover:opacity-60 transition-opacity`.
- **Desktop CTA (right, hidden below md):** An anchor "Get in touch" at `text-[23px]`, black, `underline underline-offset-2`, `hover:opacity-60 transition-opacity`.
- **Mobile hamburger (visible below md):** A button with 3 horizontal bars (each `w-6 h-[2px] bg-black`), spaced with `gap-[5px]`. On toggle, the top bar rotates 45deg and translates down 7px, middle bar fades to opacity 0, bottom bar rotates -45deg and translates up 7px. All transitions are `duration-300`.
- **Mobile overlay (z-index: 9):** `fixed inset-0 bg-white/95 backdrop-blur-sm`, flex column, vertically centered, left-aligned with `px-8 gap-8`. Same links at `text-[32px] font-medium`, plus "Get in touch" underlined. Fades in/out with `opacity` and `pointerEvents` toggled. Hidden on md+.
---
**HERO SECTION (z-index: 1)**
- Full `h-screen`, flex column. On mobile: `justify-end pb-12`. On `md:`: `justify-center pb-0`. Horizontal padding: `px-5 sm:px-8 md:px-10`. `overflow-hidden`.
- Content container: `max-w-xl`, `relative z-10`.
**1. Blurred intro label:**
- `pointer-events-none`, `select-none`, `mb-5 sm:mb-6`.
- Font size: `clamp(18px, 4vw, 26px)`, `line-height: 1.3`, `font-weight: 400`, `color: #000`, `filter: blur(4px)`.
- Two lines of text:
- Line 1: "Hey there, meet A.R.I.A,"
- Line 2: "Mainframe's Adaptive Response Interface Agent"
- Separated by a `
`.
**2. Typewriter text:**
- Text: `"Glad you stopped in. Good taste tends to find us. Now, what are we building?"`
- Custom `useTypewriter` hook: takes `text`, `speed` (default 38ms per character), `startDelay` (default 600ms). After the delay, an interval reveals one character at a time. Returns `{ displayed, done }`.
- Rendered in a `
` tag, black, `mb-5 sm:mb-6`, font size `clamp(18px, 4vw, 26px)`, `line-height: 1.35`, `font-weight: 400`, `min-height: 54px`.
- While typing, show a blinking cursor: `inline-block w-[2px] h-[1.1em] bg-black align-middle ml-[2px]` with CSS animation `blink 1s step-end infinite` (`opacity: 1 at 0%/100%, 0 at 50%`). Cursor disappears when `done` is true.
**3. Action pill buttons:**
- Appear with a fade-in + slide-up animation (`opacity 0->1`, `translateY(8px)->0`, `transition: opacity 0.4s ease, transform 0.4s ease`). They become visible 400ms after page load, independent of the typewriter animation (do NOT wait for typing to finish).
- Container: `flex flex-wrap gap-y-1`.
- **4 white pill buttons:** Labels: "Pitch us an idea", "Come work here", "Send a brief hello", "See how we operate". Each is `inline-flex items-center justify-center bg-white text-black border border-black/10 rounded-full text-[13px] sm:text-[15px] px-4 sm:px-5 py-[0.3em] mx-[0.2em] mb-[0.4em] white-space: nowrap`. Hover: `bg-black text-white`, `transition-colors duration-200`.
- **1 outline pill button:** Text "Reach us: [已省略邮箱]" (email is underlined with `underline-offset-1`), followed by a small 12x12 copy icon (inline SVG of two overlapping rectangles). Styled: `text-white bg-transparent border border-white rounded-full`, same sizing as above, with `gap-2 sm:gap-3` between text and icon. Hover: `bg-white text-black`. On click, copies "[已省略邮箱]" to clipboard via `navigator.clipboard.writeText()`.
---
DEPENDENCIES
Only React, ReactDOM, Tailwind CSS, and Vite. No other UI libraries. Lucide-react is available but not used in this component.Reusable method
Key decisions
Check whether information hierarchy, module order, and CTA clarity all hold in the final result.
Adapt it to your subject
Extract “target result → the product name, audience, page modules, and primary button → constraints” as a reusable template for similar work.
Where it breaks
Run single-variable comparisons around module order, value proposition, and CTA placement. Record the model, cost, and failures; turn it into a Skill only after it repeats reliably.
Recommended models
Derived Skill
Skills are derived from repeated patterns in published cases. They are not a separate submission type.
Creator
MotionSites focuses on production-ready AI interfaces and is active on MotionSites. “Modern Agency” is the current representative case, built with 待补充模型 with its stability retest open to votes.
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