*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #ff6b35;--secondary-color: #1a1a2e;--accent-color: #16213e;--text-primary: #ffffff;--text-secondary: #b8b8b8;--background-dark: #0f0f23;--background-card: #1e1e3f;--gradient-primary: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);--gradient-secondary: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);--shadow-light: 0 4px 15px rgba(255, 107, 53, .2);--shadow-dark: 0 8px 30px rgba(0, 0, 0, .3);--border-radius: 12px;--transition: all .3s cubic-bezier(.4, 0, .2, 1)}html{scroll-behavior:smooth;font-size:16px}body{font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--background-dark);color:var(--text-primary);line-height:1.6;overflow-x:hidden;min-height:100vh}#dynamic-background{position:fixed;top:0;left:0;width:100%;height:100%;z-index:-1;background:radial-gradient(ellipse at 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