:root{--color-primary: #1a2b4a;--color-primary-light: #2d4a7a;--color-accent: #3b82f6;--color-bg: #f0f2f5;--color-surface: #ffffff;--color-text: #1a1a2e;--color-text-secondary: #64748b;--color-border: #e2e8f0;--color-tag-bg: #e0e7ff;--color-tag-text: #3730a3;--radius: 10px;--shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .06);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}.header{background:var(--color-primary);color:#fff;position:sticky;top:0;z-index:100;box-shadow:0 2px 8px #00000026}.header-inner{max-width:1100px;margin:0 auto;padding:0 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