:root{color-scheme:light;--ink: #24312d;--muted: #6b7a74;--line: #e2ded3;--paper: #fbfaf4;--panel: #ffffff;--green: #5f8d73;--blue: #4e7894;--red: #9b3f43;--gold: #b58a44;--peach: #e7a77f;--mint: #dceade;--shadow: 0 14px 35px rgba(68, 73, 61, .1);font-family:Microsoft YaHei,Segoe UI,system-ui,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink)}button,input,select,textarea{font:inherit;letter-spacing:0}button{border:0;cursor:pointer;color:inherit}a{color:inherit}.topbar{position:sticky;top:0;z-index:10;display:flex;justify-content:space-between;align-items:center;padding:14px clamp(18px,4vw,56px);background:#fbfaf4e0;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.brand,.topbar nav,.topbar nav 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