:root{--primary:#6C4FF8;--primary-soft:#9B8AFB;--ink:#252331;--muted:#716E7E;--deep:#1E1B2E;--bg:#F7F6FB;--sub:#EEEAF8;--accent:#F06A8A;--line:#DDD8EA;--white:#fff;--shadow:0 18px 50px rgba(30,27,46,.10);--radius:24px;--shell:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);line-height:1.75}img{display:block;max-width:100%;height:auto;border-radius:20px}a{color:inherit}a:hover{color:var(--primary)}.shell{width:min(calc(100% - 40px),var(--shell));margin-inline:auto}.narrow{max-width:820px}.skip-link{position:fixed;left:16px;top:12px;z-index:99;transform:translateY(-160%);padding:10px 14px;background:var(--deep);color:#fff;border-radius:10px}.skip-link:focus{transform:none}.site-header{position:sticky;top:0;z-index:30;background:rgba(247,246,251,.94);backdrop-filter:blur(16px);border-bottom:1px solid 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auto;max-width:720px;padding:34px;background:#fff;border:1px solid var(--line);border-radius:24px}.site-footer{margin-top:70px;padding:52px 0 24px;background:var(--deep);color:#f4f1ff}.footer-grid{display:grid;grid-template-columns:1fr auto;gap:30px}.footer-grid p{color:#bbb5cd}.footer-grid nav{display:grid;grid-template-columns:repeat(2,auto);gap:8px 20px}.footer-grid nav a{color:#ddd8ef}.copyright{margin-top:30px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);color:#9e98af;font-size:.88rem}:focus-visible{outline:3px solid var(--accent);outline-offset:3px}@media(max-width:850px){.menu-button{display:block}.site-nav{display:none;position:absolute;left:20px;right:20px;top:70px;flex-direction:column;align-items:stretch;background:#fff;padding:12px;border-radius:16px;box-shadow:var(--shadow)}.site-nav.is-open{display:flex}.hero-grid,.feature-row,.feature-row.reverse,.split,.split.reverse,.two-col{grid-template-columns:1fr}.feature-row.reverse figure,.split.reverse 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