:root{--navy:#0c1530;--navy2:#101c3f;--ink:#1b2740;--muted:#5a6b8c;--line:#e4e9f3;--bg:#f5f8fd;--cyan:#00c2ff;--cyan2:#0090ff;--teal:#12d6b4;--purple:#7b5cff;--white:#fff;--danger:#e5484d;--ok:#16b364;--radius:16px;--shadow:0 10px 40px rgba(12,21,48,.10)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:"Segoe UI",-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}a{color:var(--cyan2);text-decoration:none;transition:color .2s}a:hover{color:var(--cyan)}img{max-width:100%;height:auto;display:block}ul,ol{list-style:none}.wrap{max-width:1180px;margin:0 auto;padding:0 22px}.btn{display:inline-block;padding:13px 26px;border-radius:50px;font-weight:600;font-size:15px;letter-spacing:.2px;transition:.25s;border:2px solid 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