:root{--bg:#fff;--bg2:#fffaf0;--soft:#fff6e0;--gray:#f7f7f8;--ink:#1a1a1a;--text:#333;--muted:#666;--light:#888;--yellow:#ffb800;--yellow2:#ffc933;--warm:#f5a623;--deep:#e09000;--line:rgba(255,184,0,.18);--gline:rgba(0,0,0,.08);--shadow:0 14px 40px rgba(30,25,10,.08);--yshadow:0 16px 42px rgba(255,184,0,.14);--max:1280px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.skip-link{position:fixed;left:12px;top:-70px;background:var(--ink);color:#fff;padding:10px 14px;z-index:2000;border-radius:8px}.skip-link:focus{top:10px}.site-header{position:fixed;inset:0 0 auto;z-index:700}.desktop-nav{height:74px;background:rgba(255,255,255,.97);border-bottom:1px solid var(--gline);box-shadow:0 8px 30px 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