:root{--ink:#101820;--slate:#1e2a36;--steel:#4a6fa5;--copper:#c45c26;--mist:#e8eef2;--paper:#f7f9fb;--line:#d3dde6;--muted:#5a6b7a;--text:#1a2430;--white:#fff;--shadow:0 18px 40px #1018201a;--font-display:"Kaiti SC", "STKaiti", "Songti SC", "Noto Serif SC", Georgia, serif;--font-body:"PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:88px}body{color:var(--text);background:radial-gradient(1200px 500px at 90% -10%, #4a6fa51f, transparent 55%), radial-gradient(900px 420px at -10% 20%, #c45c2614, transparent 50%), var(--paper);font:16px/1.65 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