:root{font-family:Inter,Helvetica Neue,Arial,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;color:#111316;background:#fff;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--ink: #111316;--muted: #6d737a;--line: #d8dce1;--gray: #f2f2f2;--white: #fff;--green: #164b3c;--gutter: clamp(22px, 4.5vw, 72px)}*{box-sizing:border-box}html,body,#root{min-width:320px;min-height:100%;margin:0}button,a{font:inherit}button{color:inherit}a{color:var(--green);text-underline-offset:3px}a:hover{color:var(--ink)}.app-shell{min-height:100vh;display:flex;flex-direction:column;background:var(--white)}.tool-header{display:flex;min-height:80px;align-items:center;justify-content:space-between;gap:32px;padding:0 var(--gutter);border-bottom:1px solid 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