:root{--bg:#eaf3fb;--paper:#fff;--soft:#f6faff;--media:#edf5ff;--ink:#20364d;--muted:#657b90;--line:rgba(20,126,216,.14);--blue:#147ed8;--blue2:#2da9f7;--sky:#4bc9ff;--deep:#0e2b45;--shadow:0 12px 30px rgba(20,126,216,.11)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:0;overflow-x:hidden;background:var(--bg);color:var(--ink);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.78}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%}button,a{touch-action:manipulation}button{font:inherit}.site-header{position:sticky;top:0;z-index:9000;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);box-shadow:0 6px 18px rgba(18,87,145,.08)}.header-inner{max-width:1180px;min-height:70px;margin:0 auto;padding:0 18px;display:flex;align-items:center;gap:18px}.site-logo{display:inline-flex;align-items:center;flex:0 0 auto}.site-logo 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