:root{color-scheme:dark;--bg:#080f1b;--panel:#101c2b;--line:#243247;--text:#e7edf6;--muted:#99a9be;--blue:#a1b4ff;--green:#91d6c5}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:radial-gradient(ellipse at 90% 5%,#192d463d,transparent 35%),var(--bg);color:var(--text);font:16px/1.7 "Segoe UI","Microsoft YaHei",sans-serif}button,input{font:inherit}button,a,input{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--green);outline-offset:4px}.shell{max-width:1200px;padding-inline:32px;margin:auto}header{border-bottom:1px solid #ffffff0b;background:#080f1bf0;position:sticky;top:0;z-index:5;backdrop-filter:blur(16px)}.topbar{height:82px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;white-space:nowrap}.brand 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