:root,:root[data-theme=dark]{--bg: #0a0a0a;--fg: #e0e0e0;--accent: #6366f1;--accent2: #a78bfa;--surface: #141414;--border: #2a2a2a;--muted: #666;--nav-bg: rgba(10, 10, 10, .92);--h1-grad-start: #ffffff;--nav-h: 56px}:root[data-theme=light]{--bg: #ffffff;--fg: #1f2024;--accent: #5457e6;--accent2: #7c5cf5;--surface: #f4f4f7;--border: #e4e4ea;--muted: #71717a;--nav-bg: rgba(255, 255, 255, .9);--h1-grad-start: #16161a}html{background:var(--bg)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,Noto Sans SC,-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--fg);line-height:1.6;min-height:100vh}nav{position:sticky;top:0;z-index:100;height:var(--nav-h);background:var(--nav-bg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}.nav-inner{display:flex;align-items:center;justify-content:space-between;max-width:1100px;margin:0 auto;padding:0 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28px;background:transparent;color:var(--fg);text-decoration:none;border:1px solid var(--border);border-radius:8px;font-size:.9375rem;font-weight:600;letter-spacing:.02em;transition:border-color .2s,color .2s,transform .15s}.btn-download-zip:hover{border-color:var(--accent);color:var(--fg);transform:translateY(-1px)}.hero-note{font-size:.8125rem;color:var(--muted)}.hero-media{display:flex;justify-content:center}.hero-video{width:100%;max-width:480px;height:auto;border-radius:12px;box-shadow:0 24px 70px #0000008c}.shots{display:flex;gap:24px;align-items:flex-start;justify-content:flex-start;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 24px 12px;margin:0 -24px;-webkit-overflow-scrolling:touch}@media(min-width:1024px){.shots{justify-content:center;overflow:visible;margin:0;padding-left:0;padding-right:0}}.shot{margin:0;flex:0 0 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