:root {
    --primary-color: #E60012;
    --secondary-color: #FF4D4D;
    --accent-color: #FFE5E5;
    --text-color: #333333;
    --light-text: #666666;
    --white: #FFFFFF;
}

/* 导航栏样式 */
nav {
    background: var(--white);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 20px;
}

.nav-logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: opacity 0.3s;
}

.nav-logo:hover {
    opacity: 0.9;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: all 0.3s;
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

.nav-links a:hover {
    color: var(--primary-color);
    background: var(--accent-color);
}

/* 移动端适配 */
.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    padding: 0.5rem;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1rem 0;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: 0.8rem 2rem;
        width: 100%;
        text-align: center;
    }
}