:root{--orange: #f57a32;--orange-deep: #df5425;--orange-dark: #a73d1e;--cream: #fff8ee;--paper: #fffdf8;--ink: #2e251f;--muted: #74665d;--line: #f0d9c8;--shadow: 0 24px 70px rgba(132, 57, 20, .13);--radius: 28px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:PingFang SC,Noto Sans CJK SC,Microsoft YaHei,system-ui,sans-serif;line-height:1.6;overflow-x:hidden}.setup-banner{position:sticky;z-index:30;top:0;padding:10px 18px;color:#713416;background:#ffe0bd;border-bottom:1px solid #efb47d;text-align:center;font-size:13px}button,input,select,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}.shell{width:min(1160px,calc(100% - 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