Recreate this exact full-viewport dark hero landing page for “ECHOID” — a voice-identity product for the E network. Match every detail below precisely. Do not invent extra sections, cards, stats, or decorative overlays. Desktop composition: full-bleed cinematic background video on the left/center with a right-aligned signup panel; black negative space on the left; UI pinned top (nav), right (form), and bottom (legal). ═══════════════════════════════════════ PAGE META ═══════════════════════════════════════ - Document title: ECHOID — Your voice ID to the E network - Lang: en - Pure black page background (#000) - Antialiased text - Single full-viewport section only (no other page sections) ═══════════════════════════════════════ EXACT MEDIA URLS (CloudFront — use these verbatim) ═══════════════════════════════════════ Background video (MP4): https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260806_133255_956f653f-5d80-4b06-abd5-0f46c98b60fa.mp4 Poster / fallback still (PNG): https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260806_132328_5f9029c8-218f-4489-82b6-29ff2849920e.png Video attributes: autoPlay, muted, loop, playsInline, preload="auto" Video CSS: width/height 100%, object-fit: cover, object-position: center Media layer: position absolute, inset 0, z-index -1, black background behind video Preconnect to: https://d8j0ntlcm91z4.cloudfront.net Video content (for reference): dark cinematic AI/surreal face sequence — abstrac
……（完整源码请在站内查看）