:root {
    --primary-color: #1a73e8;
    --primary-dark: #1557b0;
    --secondary-color: #667eea;
    --secondary-dark: #764ba2;
    --gradient-start: #667eea;
    --gradient-end: #764ba2;
    --text-primary: #333;
    --text-secondary: #666;
    --text-light: #888;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 40px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition: all 0.3s ease;
    --font-family: 'Noto Sans SC', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-header p {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.btn-primary {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: #fff;
    border: none;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(26, 115, 232, 0.3);
}

.btn-secondary {
    display: inline-block;
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: var(--transition);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: #fff;
}

.btn-outline-white {
    display: inline-block;
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.5);
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: var(--transition);
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
}

.card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.text-gradient {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.divider {
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
    margin: 60px 0;
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    .section-header p {
        font-size: 16px;
    }
    
    .btn-primary,
    .btn-secondary,
    .btn-outline-white {
        padding: 12px 24px;
        font-size: 14px;
    }
}