:root{--bg:#0D0D0D;--deep:#080808;--surface:#161616;--surface2:#1F1F1F;--hover:#2A2A2A;--text:#E8E8E8;--muted:#B0B0B0;--dim:#777;--orange:#FF6B00;--orange2:#FF8C00;--orange3:#E65C00;--orange4:#FFB347;--line:rgba(255,107,0,.18);--line2:rgba(255,140,0,.4);--shadow:0 16px 48px rgba(0,0,0,.65);--glow:0 12px 36px rgba(255,107,0,.22);--max:1280px;--header:74px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}body.is-locked{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{color:inherit}.skip-link{position:fixed;left:12px;top:-80px;z-index:9999;background:#fff;color:#000;padding:10px 14px;border-radius:8px}.skip-link:focus{top:12px}.container{width:min(var(--max),calc(100% - 40px));margin-inline:auto}.site-header{position:fixed;inset:0 0 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