:root{--bg:#F3F6FB;--surface:#fff;--soft:#E6EEF6;--title:#0B1F3A;--text:#1C3348;--muted:#4A6276;--faint:#7A8FA0;--brand:#0B3A6E;--blue:#1E6FBF;--cyan:#1396B3;--amber:#D97706;--coral:#E25B4C;--border:rgba(11,58,110,.16);--shadow:0 14px 34px rgba(7,20,40,.08);--footer:#071428}*{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}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}button{font:inherit}.shell{width:min(1180px,calc(100% - 32px));margin:auto}.skip-link{position:fixed;left:16px;top:-60px;z-index:300;background:#fff;color:var(--brand);padding:8px 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