:root{--bg:#F4FBFF;--surface:#fff;--soft:#E8F7FF;--primary:#11AEEA;--blue:#1688D8;--deep:#155A9D;--text:#24384A;--muted:#60758A;--border:rgba(17,174,234,.18);--footer:#073A68;--shadow:0 18px 45px rgba(21,90,157,.12);--radius:22px;--container:min(100% - 32px,1360px)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}body.drawer-open{overflow:hidden}img{max-width:100%;display:block}a{color:inherit;text-decoration:none}button{font:inherit}.skip-link{position:fixed;left:16px;top:-100px;z-index:9999;background:#fff;padding:10px 16px;border-radius:12px;box-shadow:var(--shadow)}.skip-link:focus{top:16px}.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);border-bottom:1px solid 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