:root{--primary:rgb(176,219,245);--primary-dark:#2276a6;--deep:#0b2f4a;--blue:#2f85b7;--light:#f3faff;--line:#d8edf8;--text:#101820;--muted:#5d6b78;--card:#fff;--gray:#f5f7fa;--shadow:0 14px 40px rgba(13,76,118,.08)}*{box-sizing:border-box}html,body{margin:0;padding:0;overflow-x:hidden}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:linear-gradient(180deg,#fff 0%,#f7fcff 100%);line-height:1.7}a{text-decoration:none;color:inherit}img{max-width:100%;display:block}.container{width:min(1180px,calc(100% - 32px));margin:0 auto}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;box-shadow:0 8px 24px rgba(6,42,70,.04)}.mobile-header{height:62px;display:grid;grid-template-columns:68px 1fr 78px;align-items:center;padding:0 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