:root{--bg:#F5FAFE;--deep:#E7F2FA;--card:#FFFFFF;--sub:#D7EAF6;--title:#16324A;--text:#2A4156;--muted:#4E6A80;--soft:#6E8899;--blue:#4AA3E0;--bright:#6BB8EC;--dark:#1B4A6E;--fog:#EAF5FC;--border:rgba(74,163,224,.16);--border-strong:rgba(74,163,224,.42);--shadow:0 12px 28px rgba(27,74,110,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.skip-link{position:fixed;left:8px;top:-60px;z-index:200;background:#fff;color:var(--dark);padding:8px 12px;border-radius:8px}.skip-link:focus{top:8px}.topline{position:fixed;z-index:90;top:0;left:0;right:0;height:22px;background:var(--dark);color:#fff;font-size:12px}.topline-inner,.masthead-inner,.section-tabs,.site-main,.footer-inner{width:min(1120px,calc(100% - 32px));margin:0 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