:root{--main:rgb(176,219,245);--blue:#123a63;--deep:#092640;--light:#eef8ff;--soft:#f6fbff;--gray:#667085;--line:#d9edf8;--black:#111827;--white:#fff}*{box-sizing:border-box}html,body{margin:0;overflow-x:hidden}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--black);background:linear-gradient(180deg,#fff 0%,#f7fcff 100%);line-height:1.72}.container{width:min(1180px,calc(100% - 32px));margin:0 auto}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}.mobile-header{height:64px;display:grid;grid-template-columns:64px 1fr 92px;align-items:center;padding:0 12px}.menu-button{width:42px;height:42px;border:1px solid var(--line);border-radius:14px;background:#fff;display:flex;flex-direction:column;justify-content:center;gap:5px;padding:0 10px}.menu-button 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