:root {
    --primary-color: #0066cc;
    --secondary-color: #004499;
    --accent-color: #ff6b35;
    --light-bg: #ffffff;
    --light-secondary: #f8f9fa;
    --light-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #495057;
    --text-muted: #6c757d;
    --border-color: #dee2e6;
    --gradient-primary: linear-gradient(
        135deg,
        #0066cc 0%,
        #004499 50%,
        #003366 100%
    );
    --gradient-light: linear-gradient(
        135deg,
        #ffffff 0%,
        #f8f9fa 50%,
        #e9ecef 100%
    );
    --gradient-tech: linear-gradient(45deg, #0066cc, #ff6b35, #0066cc);
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 5px 20px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 10px 40px rgba(0, 0, 0, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Exo 2", "Microsoft YaHei", Arial, sans-serif;
    background: var(--light-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}