:root {
    --primary-color: #2c5282;
    --secondary-color: #4299e1;
    --text-color: #2d3748;
    --light-bg: #f7fafc;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

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

/* 导航栏样式 */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: white;
}

/* 头部区域样式 */
.header {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2rem 0 4rem;
}

.hero {
    text-align: center;
    padding: 4rem 0;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* 章节通用样式 */
section {
    padding: 4rem 0;
}

section h2 {
    text-align: center;
    margin-bottom: 2rem;
}

/* 产品展示样式 */
.product-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.product {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0