/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #666666;
    --secondary-color: #999999;
    --third-color: #f8f8f8bd;
    --accent-color: #ff6b35;
    --text-color: #555555;
    --text-light: #999;
    --bg-color: #ffffff;
    --bg-light: #f8f9fa;
    --bg-gray: #b9b9b9;
    --border-color: #e0e0e0;
    --font-primary: 'Inter', 'Noto Sans SC', sans-serif;
    --transition: all 0.3s ease;
    --max-width: 1200px;
    --section-padding: 40px 0;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3.5rem;
    font-weight: 300;
}

h2 {
    font-size: 2.5rem;
    font-weight: 300;
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 32px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--bg-color);
}

.btn-primary:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
}

/* Utility Classes */
.text-center {
    text-align: right;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }