:root{--background:#f7f8f4;--surface:#fff;--ink:#17211f;--muted:#586662;--primary:#19786f;--primary-dark:#0f5f58;--primary-soft:#e5f1ee;--gold:#a86f17;--gold-soft:#f7ecd7;--border:#dce4e1;--error:#b42318;--error-soft:#fff0ed;--shadow:0 22px 70px #1039341f;--radius-lg:32px;--radius-md:20px;--font-sans:"PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);background:var(--background);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;margin:0;font-size:16px;line-height:1.7}a{color:inherit}button,input,textarea{font:inherit}button,summary,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}.shell{width:min(1120px,100% - 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