/* Support Page Styles */

/* Header Navigation */
.support-header-nav {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

.support-header-nav .header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.support-header-nav .brand-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #333;
    font-size: 1.5rem;
    font-weight: 700;
    transition: color 0.3s ease;
}

.support-header-nav .brand-logo:hover {
    color: #667eea;
}

.support-header-nav .brand-logo i {
    margin-right: 10px;
    color: #667eea;
    font-size: 1.8rem;
}

.support-header-nav .back-home {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #666;
    font-size: 1rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.support-header-nav .back-home:hover {
    color: #667eea;
}

.support-header-nav .back-home i {
    margin-right: 8px;
}

/* Main Content */
.support-main {
    min-height: calc(100vh - 80px);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 60px 0;
}

.support-header {
    text-align: center;
    margin-bottom: 50px;
    color: white;
}

.support-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.support-title i {
    margin-right: 15px;
    color: #ffd700;
}

.support-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

.contact-section {
    margin-bottom: 60px;
}

.contact-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.1);
    max-width: 600px;
    margin: 0 auto;
}

.qr-section {
    text-align: center;
    margin-bottom: 30px;
}

.qr-container {
    margin-bottom: 20px;
}

.qr-code {
    width: 200px;
    height: 200px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.qr-text h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
}

.qr-text p {
    color: #666;
    font-size: 1rem;
}

.contact-info {
    border-top: 1px solid #eee;
    padding-top: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    color: #555;
}

.contact-item i {
    width: 20px;
    margin-right: 15px;
    color: #667eea;
}

.promise-section {
    text-align: center;
    color: white;
}

.promise-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 40px;
}

.promise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.promise-card {
    background: rgba(255,255,255,0.1);
    border-radius: 15px;
    padding: 30px 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    transition: transform 0.3s ease;
}

.promise-card:hover {
    transform: translateY(-5px);
}

.promise-icon {
    margin-bottom: 20px;
}

.promise-icon i {
    font-size: 3rem;
    color: #ffd700;
}

.promise-card h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.promise-card p {
    font-size: 0.95rem;
    opacity: 0.9;
    line-height: 1.6;
}

.support-footer {
    background: rgba(0,0,0,0.1);
    color: white;
    padding: 30px 0;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.support-footer .footer-content {
    text-align: center;
}

.support-footer .footer-links {
    margin-bottom: 15px;
}

.support-footer .footer-links a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.support-footer .footer-links a:hover {
    opacity: 1;
}

.support-footer .footer-info p {
    margin: 5px 0;
    font-size: 0.9rem;
    opacity: 0.7;
}

.support-footer .footer-links a.active {
    opacity: 1;
    font-weight: 600;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .support-header-nav .header-content {
        flex-direction: column;
        gap: 15px;
    }
    
    .support-header-nav .brand-logo {
        font-size: 1.3rem;
    }
    
    .support-header-nav .back-home {
        font-size: 0.9rem;
    }
    
    .support-main {
        padding: 40px 0;
    }
    
    .support-title {
        font-size: 2rem;
    }
    
    .contact-card {
        padding: 30px 20px;
        margin: 0 15px;
    }
    
    .qr-code {
        width: 160px;
        height: 160px;
    }
    
    .promise-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 15px;
    }
}