:root{--red: #e63946;--red-dark: #c1121f;--dark: #1a1a1a;--gray: #6b7280;--bg: #ffffff;--bg-soft: #f9fafb;--border: #e5e7eb;--text: #111827;--max: 1120px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;color:var(--text);background:var(--bg);line-height:1.6}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{max-width:var(--max);margin:0 auto;padding:0 24px}.header{position:sticky;top:0;z-index:50;background:#ffffffeb;backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:18px}.logo .bear{font-size:24px}.logo .red{color:var(--red)}.nav{display:flex;gap:28px}.nav a{color:var(--gray);font-size:14px;font-weight:500}.nav 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