:root{--bg-deep:#071d22;--bg-main:#0c2b31;--bg-surface:#12383d;--bg-surface2:#1b474b;--teal:#0c7778;--mint:#48c9ba;--mint-soft:#bcebe4;--paper:#f4f9f7;--cream:#fffcf6;--border-light:#d8e9e5;--text-light:#f7fcfa;--body-light:#d5e7e4;--text-dark:#17343a;--body-dark:#355159;--muted-dark:#526c72;--coral:#e8907e;--amber:#e5bb76;--blue:#87acc6}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8;background:var(--cream);color:var(--text-dark)}button,input,textarea{font:inherit}button,a{touch-action:manipulation}a{text-decoration:none;color:inherit}button{cursor:pointer}img{display:block;max-width:100%;height:auto}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(29px,3.7vw,40px);line-height:1.25;letter-spacing:-.025em}h2{font-size:clamp(21px,2.5vw,28px);line-height:1.3}h3{font-size:19px;line-height:1.45}p{color:inherit}.shell{width:min(1240px,calc(100% - 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