:root{--ink:#242236;--muted:#686578;--purple:#6b1f6e;--dark:#1a1a1a;--line:#e4e0eb;--paper:#fffbeb;--accent:#ffd900}*{box-sizing:border-box}body{background:var(--paper);color:var(--ink);margin:0;font-family:Inter,PingFang SC,Microsoft YaHei,sans-serif;font-size:16px;line-height:1.7}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline-offset:4px;outline:3px solid #a18bd4}.shell{max-width:1280px;margin:auto;padding:0 48px}.topbar{justify-content:space-between;align-items:center;gap:16px;min-height:94px;display:flex}.brand{letter-spacing:.05em;align-items:center;gap:20px;font-size:24px;font-weight:700;display:flex}.brand span{color:var(--muted);letter-spacing:.12em;border-left:1px solid 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