/* 
 * B9 Food & Beverage - Header & Footer Styles
 * Version: 1.0
 * Date: 2026-04-04
 */

/* Header Styles */
.header {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    text-decoration: none;
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo:hover {
    color: var(--primary-yellow);
}

/* Navigation Menu */
.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    margin: 0;
    padding: 0;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--primary-yellow);
    background-color: var(--yellow-light);
}

.nav-link.active {
    color: var(--primary-yellow);
    background-color: var(--yellow-light);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background-color: var(--primary-yellow);
    border-radius: var(--radius-sm);
}

/* Hamburger Menu (Mobile) */
.hamburger {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 4px;
    z-index: 10000; /* 确保在最上层 */
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    transition: all 0.3s ease;
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger.active .bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.active .bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Footer Styles */
.footer {
    background-color: var(--bg-dark);
    color: var(--text-white);
    padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-lg);
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h3 {
    color: var(--primary-yellow);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.footer-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--primary-yellow);
}

.footer-section p {
    color: #d1d5db;
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

/* Footer Links */
.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-links li i {
    color: var(--primary-yellow);
    width: 20px;
}

.footer-links a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-yellow);
}

/* Social Links */
.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: #374151;
    color: var(--text-white);
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background-color: var(--primary-yellow);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

/* Newsletter Form */
.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.newsletter-form input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
}

.newsletter-form input:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--primary-yellow);
}

.newsletter-form button {
    background-color: var(--primary-yellow);
    color: var(--text-white);
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.newsletter-form button:hover {
    background-color: var(--yellow-dark);
}

/* Footer Bottom */
.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid #374151;
    color: #9ca3af;
    font-size: 0.9rem;
}

.footer-bottom p {
    margin: 0;
}

/* Responsive Design for Header & Footer */
@media (max-width: 768px) {
    .navbar {
        padding: var(--spacing-md);
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-xl) 0;
        gap: var(--spacing-lg);
        z-index: 9999; /* 确保在最上层 */
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }
    
    .footer-section h3::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .social-links {
        justify-content: center;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-form button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .logo span {
        font-size: 1rem;
    }
    
    .logo-img {
        height: 30px;
    }
    
    .footer {
        padding: var(--spacing-2xl) var(--spacing-md) var(--spacing-lg);
    }
}