可直接使用的提示词
Build a **single self-contained `index.html`** that recreates this cybersecurity landing page **pixel-faithfully**. Fixed fullscreen black stage, left-locked typography, right-side looping video atmosphere, one-shot entrance choreography, and a mobile burger overlay. No frameworks. No scroll. No cards. No purple. No rounded pills.
---
## 1. Document shell
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover">
<title>Security built into every system layer</title>
```
- `html, body { height:100%; background:#000; overflow:hidden }`
- `body { -webkit-font-smoothing:antialiased; text-rendering:geometricPrecision }`
---
## 2. Fonts (exact aliases from the original)
Embed two WOFF2 faces as `@font-face` with **`font-display:block`**:
| CSS family alias | Actual font | Role |
|---|---|---|
| `'SG'` | **Space Grotesk** (original embeds the Light cut as `SpaceGrotesk-Light`) | Headline, button labels, stat labels, mobile menu rows |
| `'JB'` | **JetBrains Mono Regular** (`JetBrainsMono-Regular`) | Nav links, subcopy, stat numbers, menu eyebrow/note/sublinks |
CSS weight usage (even if the embed is a single cut — match the original declarations):
- **SG**: `480` (buttons), `700` (h1 + mobile `.mrow`), `400` (stat labels)
- **JB**: `400` (nav, sub, menu), `480` (stat numbers)
Closest public substitutes if not copying the original base64: Google Fonts **Space Grotesk** + **JetBrains Mono**, still aliased as `'SG'` / `'JB'`.
---
## 3. Design tokens / scaling system
Three design canvases via `--s`:
**Desktop (default)**
```css
:root {
--s: min(100vw / 1505, 100vh / 700);
--red: #c81b1c;
--ink: #fff;
--sub: #e6e6e6;
--lab: #949494;
--bx:60; --by:36; --bs:44; /* burger box */
--h1y: -12.5;
--suby: 167.5;
--numy: 19;
--laby: 74;
}
```
**Tablet portrait** `@media (max-width:1023px) and (max-aspect-ratio:1/1)`
canvas **900×1200**:
```css
--s: clamp(0.82px, min(100vw / 900, 100vh / 1200), 1.25px);
--bx:56; --by:33; --bs:40;
--h1y:-10.25; --suby:137.4; --numy:15.6; --laby:60.7;
```
**Phone** `@media (max-width:599px)`
canvas **430×620**:
```css
--s: min(100vw / 430, 100vh / 620, 1.02px);
--bx:26; --by:21; --bs:34;
--h1y:-7.1; --suby:108; --numy:13; --laby:50;
```
Every layout value is `calc(N * var(--s))`. Do not use free rem/px layout outside this system.
---
## 4. Background video (mandatory exact URL)
Use this **exact** CloudFront URL everywhere a bg plate appears:
```
https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260809_132544_b6ef0174-ed95-45ad-9a2f-ccb8acfbdce8.mp4
```
**Three synced `<video>` instances**, each with:
`autoplay muted loop playsinline preload="auto"`
1. `.bg > video` — primary full-bleed plate
2. `.bg2 > video` — second pass, lifted lower half
3. `.menu-tex > video` — faint overlay inside mobile menu
CSS:
```css
.screen { position:fixed; inset:0; overflow:hidden; background:#000 }
.bg, .bg2 { position:absolute; inset:0; overflow:hidden; pointer-events:none }
.bg { filter: url(#grade) }
.bg video, .bg2 video {
position:absolute; inset:0; width:100%; height:100%;
object-fit:cover; object-position:center top; display:block;
}
.bg2 {
filter: url(#grade2);
mix-blend-mode: plus-lighter;
opacity: .35;
-webkit-mask-image: linear-gradient(180deg, transparent 21.5%, #000 100%);
mask-image: linear-gradient(180deg, transparent 21.5%, #000 100%);
}
```
**Tablet portrait video treatment**
- `.bg2 { display:none }`
- `.bg video { object-position:right top; transform:scale(1.18); transform-origin:right top }`
- `.bg` masked: `linear-gradient(180deg, #000 0 40%, transparent 64%)`
- `.scrim` ON: `linear-gradient(100deg, #000 26%, rgba(0,0,0,.74) 50%, rgba(0,0,0,.18) 76%, transparent 92%)`
**Phone video treatment**
- videos `object-position:78% top`
- `.bg2` shown again with mask `linear-gradient(180deg, transparent 10%, #000 60%)`
- `.scrim` ON vertical:
`linear-gradient(180deg, rgba(0,0,0,.10) 0%, rgba(0,0,0,.50) 24%, rgba(0,0,0,.86) 42%, #000 66%)`
**Video sync script**: master = first video; on `timeupdate`, if other videos drift `>0.12s`, set `currentTime` to master. If `prefers-reduced-motion: reduce`, pause all and remove `autoplay`.
**SVG color-grade filters** (required — applied to video containers):
### `#grade`
```xml
<filter id="grade" color-interpolation-filters="sRGB">
<feComponentTransfer>
<feFuncR type="table" tableValues="0.0018 0.0105 0.0154 0.0228 0.0307 0.0404 0.0485 0.0585 0.0719 0.0923 0.1205 0.1466 0.1657 0.1866 0.2197 0.2405 0.2485 0.2921 0.3362 0.3465 0.3472 0.3781 0.3781 0.4078 0.4199 0.4391 0.4604 0.4763 0.4798 0.5197 0.5473 0.5720 0.5995 0.6048 0.6232 0.6322 0.6483 0.6734 0.7201 0.7201 0.7410 0.7707 0.7707 0.7790 0.8084 0.8084 0.8390 0.8595 0.8707 0.8870 0.8993 0.9085 0.9132 0.9132 0.9162 0.9162 0.9162 0.9162 0.9162 0.9162 0.9162 0.9162 0.9162 0.9238 0.9300"/>
<feFuncG type="table" tableValues="0.0023 0.0106 0.0159 0.0250 0.0333 0.0445 0.0535 0.0620 0.0707 0.0827 0.0936 0.1063 0.1214 0.1402 0.1678 0.1727 0.2029 0.2176 0.2461 0.2757 0.2814 0.3050 0.3415 0.3692 0.3826 0.3884 0.4617 0.4617 0.4617 0.4643 0.4643 0.4808 0.5706 0.6005 0.6005 0.6390 0.6390 0.6390 0.6390 0.6390 0.6390 0.6390 0.6390 0.6390 0.6524 0.6664 0.6805 0.6945 0.7086 0.7227 0.7367 0.7508 0.7648 0.7789 0.7929 0.8070 0.8211 0.8351 0.8492 0.8632 0.8773 0.8913 0.9054 0.9195 0.9300"/>
<feFuncB type="table" tableValues="0.0021 0.0110 0.0187 0.0311 0.0377 0.0466 0.0584 0.0706 0.0791 0.0924 0.1039 0.1145 0.1316 0.1464 0.1614 0.1719 0.1887 0.2014 0.2247 0.2458 0.2954 0.2954 0.3089 0.3938 0.3938 0.3988 0.3988 0.4581 0.4581 0.4762 0.4762 0.4763 0.5374 0.5560 0.5813 0.5813 0.5813 0.5813 0.5835 0.5969 0.6104 0.6238 0.6373 0.6507 0.6642 0.6777 0.6911 0.7046 0.7181 0.7315 0.7449 0.7584 0.7719 0.7853 0.7988 0.8123 0.8257 0.8391 0.8526 0.8661 0.8795 0.8930 0.9065 0.9199 0.9300"/>
</feComponentTransfer>
</filter>
```
### `#grade2` (slightly darker lift pass)
```xml
<filter id="grade2" color-interpolation-filters="sRGB">
<feComponentTransfer>
<feFuncR type="table" tableValues="0.0016 0.0092 0.0136 0.0201 0.0270 0.0356 0.0427 0.0515 0.0633 0.0812 0.1060 0.1290 0.1458 0.1642 0.1933 0.2116 0.2187 0.2570 0.2959 0.3049 0.3055 0.3327 0.3327 0.3589 0.3695 0.3864 0.4052 0.4191 0.4222 0.4573 0.4816 0.5034 0.5276 0.5322 0.5484 0.5563 0.5705 0.5926 0.6337 0.6337 0.6521 0.6782 0.6782 0.6855 0.7114 0.7114 0.7383 0.7564 0.7662 0.7806 0.7914 0.7995 0.8036 0.8036 0.8063 0.8063 0.8063 0.8063 0.8063 0.8063 0.8063 0.8063 0.8063 0.8129 0.8184"/>
<feFuncG type="table" tableValues="0.0015 0.0069 0.0103 0.0163 0.0216 0.0289 0.0348 0.0403 0.0460 0.0538 0.0608 0.0691 0.0789 0.0911 0.1091 0.1123 0.1319 0.1414 0.1600 0.1792 0.1829 0.1983 0.2220 0.2400 0.2487 0.2525 0.3001 0.3001 0.3001 0.3018 0.3018 0.3125 0.3709 0.3903 0.3903 0.4153 0.4153 0.4153 0.4153 0.4153 0.4153 0.4153 0.4153 0.4153 0.4241 0.4332 0.4423 0.4514 0.4606 0.4698 0.4789 0.4880 0.4971 0.5063 0.5154 0.5246 0.5337 0.5428 0.5520 0.5611 0.5702 0.5793 0.5885 0.5977 0.6045"/>
<feFuncB type="table" tableValues="0.0013 0.0066 0.0112 0.0187 0.0226 0.0280 0.0350 0.0424 0.0475 0.0554 0.0623 0.0687 0.0790 0.0878 0.0968 0.1031 0.1132 0.1208 0.1348 0.1475 0.1772 0.1772 0.1853 0.2363 0.2363 0.2393 0.2393 0.2749 0.2749 0.2857 0.2857 0.2858 0.3224 0.3336 0.3488 0.3488 0.3488 0.3488 0.3501 0.3581 0.3662 0.3743 0.3824 0.3904 0.3985 0.4066 0.4147 0.4228 0.4309 0.4389 0.4469 0.4550 0.4631 0.4712 0.4793 0.4874 0.4954 0.5035 0.5116 0.5197 0.5277 0.5358 0.5439 0.5519 0.5580"/>
</feComponentTransfer>
</filter>
```
Hide defs: `.svgdefs { position:absolute; width:0; height:0; overflow:hidden }`
---
## 5. Exact copy & DOM structure
Layer tree inside `.screen`:
1. `.bg` (+ video)
2. `.bg2` (+ video)
3. `.scrim` (hidden on desktop)
4. `.frame` (flex column) containing:
- `header`
- spacer `.sp.sp-a`
- `section.hero`
- spacer `.sp.sp-b`
- `section.stats`
- spacer `.sp.sp-c`
5. `#menu.menu` overlay (mobile)
### Header
- **Logo**: 46×46 SVG, 4 chevron-arrows pointing inward (N/E/S/W), white stroke `#fff`, `stroke-width="3"`, butt caps. Paths per arm: `M23 0V19.5` + `M14 10.2L23 19.2L32 10.2`, rotated 0/90/180/270 around `(23,23)`. Desktop: left `60`, top `35`, size `45`.
- **Nav** (desktop only): `Home` · `Resources▾` · `Benefits▾` · `Contact`
- font JB 400 / `19.9` / white
- nav origin left `482`, top `32`, height `58`
- default sibling gap `40`; 2nd link margin-left `53`; 4th `37`
- chevron SVG 11×6, stroke `currentColor` 1.7, path `M1 1L5.5 5L10 1`, size `11.6×7.2`, margin-top `-2.6`
- **Burger** (≤1023px): 3 white bars; 3rd bar shorter (`.47` width) until open; open → X (`rotate ±45deg`, middle opacity 0). Aria: `Open menu` / `Close menu`.
- **Top CTA** `.btn.btn-top`: label **Secure system** + arrow SVG (`M0 9H20.1` / `M12.1 1L20.1 9L12.1 17`), left `1232`, top `30`.
### Hero
Exact headline (two masked lines):
```
Security built into
every system layer
```
Markup:
```html
<h1>
<span class="ln"><span>Security built into</span></span>
<span class="ln"><span>every system layer</span></span>
</h1>
```
- SG 700, size `68.7`, line `76`, tracking `-2.4`, left `73`, top `--h1y`
Subcopy (exact break):
```
Engineered to stay resilient, controlled,
and uncompromised under pressure.
```
- JB 400, size `18.7`, line `26`, tracking `-0.87`, color `--sub`, left `73`, top `--suby`
CTA `.btn.btn-cta` identical to top button, left `73`, top `248`.
### Buttons (shared `.btn`)
- Desktop: `212×58`, bg `--red`, padding L`18` R`22`, gap `11`
- Label SG 480 / `20.85` / tracking `-0.62` / translateY `1.5`
- Arrow `21.5×18`, white stroke 2
- Hover (hover-capable only): bg `#b01617`; arrow `translateX(3)`
- Tablet: `174×47.6`, pad `14.8/18`, gap `9`, label `17.1`
- Phone: `185×50`, pad `15.7/19.1`, gap `9.6`, label `17.5`
- Sharp corners (no border-radius)
### Stats
| Stat | Number | Label | left |
|---|---|---|---|
| s1 | `300+` | Clients | `70.4` |
| s2 | `99%` | Satisfaction | `213.1` |
| s3 | `$5M+` | Revenue | `392.6` (num offset `-4.4`) |
- Numbers: JB 480 / `33.45` / white
- Labels: SG 400 / `21.9` / tracking `-0.62` / `--lab`
- Vertical rules `.r1` @ `181`, `.r2` @ `356`, width `1.5`, gradient
`linear-gradient(180deg, rgba(255,255,255,.085), rgba(255,255,255,.21) 50%, rgba(255,255,255,.085))`
### Fluid spacers (desktop)
```
.sp-a flex 239 / .sp-b 194 / .sp-c 115
```
(Tablet 340/276/163 · Phone 106/92/56)
### Mobile menu (`#menu`)
- Fullscreen black plate + `.menu-tex` video at opacity `.4` with top fade mask
- Red top rule `.menu-rule` height `2`, scales X from 0→1 on open (`.55s`, delay `.04s`, cubic-bezier `.2,.7,.2,1`)
- Eyebrow: `MENU` style — JB, `11.5`, letter-spacing `.22em`, uppercase, `--lab`
- Rows: Home · Resources (accordion) · Benefits (accordion) · Contact
- Resources children: Documentation / Threat reports / Changelog
- Benefits children: Continuous monitoring / Access control / Incident response
- Footer CTA full-width `.btn-menu` + note: `300+ clients / 99% satisfaction`
- Open: body class `nav-open`; list items stagger fade/rise delays `.08/.14/.20/.26s`
- Accordion: only one open; Escape closes; link click closes; resize to desktop closes
Breakpoint: `@media (max-width:1023px)` hide `nav` + `.btn-top`, show burger + menu.
---
## 6. Entrance animation (exact choreography)
**Arm before paint** (inline in `<head>` after CSS): if WAAPI exists and motion is allowed, add class `intro` to `<html>` immediately so the finished page never flashes.
**Initial `html.intro` CSS state**
- logo / nav links / burger / sub / stats: `opacity:0`
- logo `scale(.9)`; nav `translateY(7)`; sub `14`; nums `12`; labs `10`
- rules `scaleY(0)` origin center
- `.btn-top` / `.btn-cta`: `clip-path: inset(0 100% 0 0)` (wipe draw, not fade)
- each `h1 .ln`: `overflow:hidden` + pad-bottom `6` / margin-bottom `-6` (protect SG descenders)
- inner spans start at `translateY(120%)`
**Master timeline** (absolute seconds; phone multiplies all durations/delays by `0.86`)
Easings:
- `EXPO = cubic-bezier(.16,1,.3,1)`
- `QUINT = cubic-bezier(.22,1,.36,1)`
- `QUART = cubic-bezier(.25,1,.5,1)`
- `TYPE = cubic-bezier(.22,.85,.24,1)`
| t | Action |
|---|---|
| 0.00 | Logo: opacity 0→1 + scale .9→1, dur `.70`, EXPO |
| 0.12 | Nav links rise `7`, dur `.62`, stagger `.055`, QUINT |
| 0.18 | Burger fade, dur `.55`, QUART |
| 0.28 | Top button wipe clip, dur `.66`, EXPO |
| 0.34 | Headline lines rise from 120%, dur `.98`, stagger `.09`, TYPE |
| 0.74 | Sub rise `14`, dur `.72`, QUINT |
| 0.90 | Hero CTA wipe, dur `.70`, EXPO |
| 0.98 | Rules scaleY 0→1, dur `.60`, stagger `.07`, QUART |
| 1.04 | Stat nums rise `12`, dur `.66`, stagger `.085`, QUINT |
| 1.10 | Stat labs rise `10`, dur `.62`, stagger `.085`, QUINT |
| ~1.9 | Complete |
**Completion rules**
- Wait for `document.fonts.ready` (backup `1000ms`), then `rAF` (+ `1200ms` backup) to start once.
- Measure `--s` via probe `width: calc(100 * var(--s))` because unregistered custom props don’t resolve in getComputedStyle.
- On finish: remove `intro`, **cancel** all animations (no residual inline styles). Hard deadline `4000ms`.
- Background video is **never** part of the entrance — it is already on stage.
- `prefers-reduced-motion: reduce`: no `intro` class; everything visible/static.
---
## 7. Interaction / a11y
- Hover only under `@media (hover:hover)`: nav → `--red`; buttons darken; menu rows/sublinks as specified
- Focus-visible: `2` white outline, offset `3`
- Reduced motion: kill transitions (`* { transition:none !important }`) and skip entrance
---
## 8. Non-negotiables for “exact”
1. Exact video URL above (all 3 instances)
2. Font aliases `'SG'` = Space Grotesk, `'JB'` = JetBrains Mono, `font-display:block`
3. Canvas scaler `--s` with 1505×700 / 900×1200 / 430×620
4. Dual graded video layers + exact LUT filters
5. Copy, line breaks, stats, menu tree character-exact
6. One-shot WAAPI entrance with absolute timing table above
7. Sharp red CTAs (`#c81b1c`), no border-radius
8. Single-file HTML, fullscreen, no scroll案例说明
面向网络安全的网页首屏效果，以悬停反馈、沉浸式视频、动态渐变组织视觉层次；适合用于网页原型、品牌展示与交互动效参考。
适用信息
技术栈：React + Tailwind CSS + Motion
难度：进阶
标签：网页特效、网页首屏、悬停反馈、沉浸式视频、动态渐变、Cybersecurity
动态效果预览
来源：AI妙词（已获授权转载），原条目 ID 243。
