:root{--bg:#07111f;--card:rgba(255,255,255,.08);--card2:rgba(255,255,255,.12);--text:#eef7ff;--muted:#a8bdd6;--brand:#5ef3ff;--accent:#ffb25e;--line:rgba(255,255,255,.16);--shadow:0 24px 70px rgba(0,0,0,.32)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;background:radial-gradient(circle at 20% 0%,#173b86 0,#07111f 32%,#050912 100%);color:var(--text);line-height:1.75}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.wrap{width:min(1180px,92vw);margin:auto}.topbar{position:sticky;top:0;z-index:20;background:rgba(7,17,31,.78);backdrop-filter:blur(18px);border-bottom:1px solid 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