:root{color-scheme:light;--page: #eef2f6;--surface: #ffffff;--ink: #17202a;--muted: #64748b;--line: #cfd7e3;--line-strong: #111827;--accent: #0f766e;--accent-deep: #115e59;--accent-soft: #d9f2ee;--danger: #b42318;--shadow: 0 18px 46px rgba(18, 38, 63, .1)}*{box-sizing:border-box}html{min-width:320px;background:var(--page)}body{margin:0;min-height:100vh;font-family:Microsoft YaHei,PingFang SC,Noto Sans CJK SC,system-ui,sans-serif;background:linear-gradient(180deg,#f7fafc 0%,var(--page) 360px),var(--page);color:var(--ink)}button,input,select,textarea{font:inherit}button{cursor:pointer}.app-shell{width:min(1480px,100%);min-height:100vh;margin:0 auto;padding:28px}.masthead{display:flex;align-items:end;justify-content:space-between;gap:20px;padding:10px 2px 24px}.eyebrow{margin:0 0 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