/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --earth-brown: #8B7355;
    --indigo-blue: #4B5F8C;
    --tech-blue: #2196F3;
    --light-bg: #F5F5F0;
    --dark-text: #2C2C2C;
}

body {
    font-family: 'Microsoft YaHei', 'SimHei', sans-serif;
    color: var(--dark-text);
    line-height: 1.6;
}

/* 导航栏 */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(75, 95, 140, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav .container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
}

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

nav a {
    color: white;
    text-decoration: none;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--tech-blue);
}

@media (max-width: 768px) {
    nav ul {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
}