:root{--ink:#182823;--paper:#f4f2ea;--white:#fffef9;--line:#d7d4ca;--blue:#165dff;--coral:#ff6c4b;--lime:#d9f36b;--muted:#66736e;--shadow:0 18px 48px rgba(24,40,35,.12);--radius:22px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:PingFang SC,Microsoft YaHei,sans-serif;line-height:1.5}button,input,select,textarea{font:inherit}button{cursor:pointer}a,button{color:inherit}a{text-decoration:none}body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.17;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='a'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23a)' opacity='.15'/%3E%3C/svg%3E");z-index:20}.topline{height:6px;background:linear-gradient(90deg,var(--blue) 0 45%,var(--coral) 45% 73%,var(--lime) 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