:root{color-scheme:dark;--bg:#050b13;--panel:#0b1727;--panel2:#0e1c2f;--line:#233b59;--text:#edf5ff;--muted:#8297b2;--blue:#3697ff;--cyan:#28d7d1;--red:#ff718a;--green:#48d7a4}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,"Microsoft YaHei",sans-serif;background:radial-gradient(circle at 75% 10%,#073747 0,transparent 32%),radial-gradient(circle at 15% 0,#122a58 0,transparent 28%),var(--bg);color:var(--text)}button,select,textarea,input{font:inherit}.topbar{position:sticky;top:0;z-index:10;height:68px;display:flex;align-items:center;justify-content:space-between;padding:0 30px;border-bottom:1px solid #18314a;background:#06101dd9;backdrop-filter:blur(18px)}.brand{display:flex;gap:11px;align-items:center;color:inherit;text-decoration:none}.brand>b{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--blue),var(--cyan));font-size:20px}.brand 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