:root{--bg:#EEF5FB;--deep:#E3EEF7;--card:#fff;--soft:#D7E8F4;--ink:#10263A;--text:#243848;--muted:#5A7388;--aux:#7E93A6;--blue:#3B9FE0;--bright:#62B7EE;--steel:#1E6FB8;--ice:#A9D6F2;--mint:#2FA8A0;--line:rgba(30,111,184,.16);--focus:rgba(59,159,224,.38);--shadow:0 16px 40px rgba(16,38,58,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.wrap{width:min(1220px,calc(100% - 32px));margin:auto}.site-head{position:fixed;inset:0 0 auto;z-index:50}.brand-strip{height:18px;background:var(--steel);color:#fff;font-size:11px;line-height:18px}.strip-inner{display:flex;justify-content:space-between;height:18px}.strip-brand{font-weight:700}.plain-head-btn{border:0;background:none;color:#fff;padding:0 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