:root{--bg:#F5FBFF;--white:#fff;--soft:#EAF7FC;--pale:#DFF5FB;--cyan:#25C8D1;--sky:#25B6E8;--blue:#1787DB;--navy:#174B78;--heading:#173B60;--body:#2D4359;--muted:#687F93;--border:#DCEBF3;--radius:18px;--shadow:0 12px 34px rgba(20,83,122,.06)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.8 Arial,'PingFang SC','Microsoft YaHei',sans-serif;overflow-x:hidden}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button{font:inherit}img{max-width:100%}.wrap{width:min(1160px,calc(100% - 48px));margin-inline:auto}.skip-link{position:absolute;left:16px;top:-80px;z-index:200;background:white;padding:8px}.skip-link:focus{top:8px}.site-header{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.97);border-bottom:1px solid 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