/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 15px;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p {
    margin-bottom: 15px;
    color: #666;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 16px;
}

.btn-primary {
    background-color: #007bff;
    color: white;
}

.btn-primary:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
    margin-left: 15px;
}

.btn-secondary:hover {
    background-color: #545b62;
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0;
    text-align: center;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.hero-content {
    flex: 1;
    text-align: left;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 10px;
    color: white;
}

.hero-content h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #f8f9fa;
    font-weight: 400;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #e9ecef;
}

.hero-buttons {
    margin-top: 30px;
}

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.features h2 {
    text-align: center;
    margin-bottom: 50px;
    color: #333;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.feature-item {
    text-align: center;
    padding: 30px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: #007bff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon img {
    width: 40px;
    height: 40px;
    filter: brightness(0) invert(1);
}

.feature-item h3 {
    color: #333;
    margin-bottom: 15px;
}

.feature-item p {
    color: #666;
    line-height: 1.6;
}

/* Partnership Section */
.partnership-section {
    padding: 80px 0;
    background-color: #fff;
}

.partnership-content {
    display: flex;
    align-items: center;
    gap: 60px;
}

.partnership-text {
    flex: 1;
}

.partnership-text h2 {
    color: #007bff;
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.partnership-text h3 {
    color: #333;
    font-size: 1.8rem;
    margin-bottom: 25px;
}

.partnership-text p {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.partnership-benefits {
    list-style: none;
    margin: 25px 0;
}

.partnership-benefits li {
    color: #28a745;
    font-size: 1.1rem;
    margin-bottom: 10px;
    padding-left: 10px;
}

.partnership-buttons {
    margin-top: 30px;
    display: flex;
    gap: 20px;
}

.partnership-qr {
    flex: 0 0 300px;
    text-align: center;
}

.qr-code {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.qr-code img {
    width: 200px;
    height: 200px;
    border-radius: 10px;
    background: #fff;
    padding: 10px;
}

.qr-text {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.6;
    margin: 0;
}

/* QR Code Placeholder */
.qr-placeholder {
    width: 200px;
    height: 200px;
    background: #fff;
    border: 2px solid #ddd;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.qr-pattern {
    width: 160px;
    height: 160px;
    background: linear-gradient(45deg, #333 25%, transparent 25%),
                linear-gradient(-45deg, #333 25%, transparent 25%),
                linear-gradient(45deg, transparent 75%, #333 75%),
                linear-gradient(-45deg, transparent 75%, #333 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    margin-bottom: 10px;
}

.qr-placeholder p {
    color: #666;
    font-size: 14px;
    margin: 0;
    text-align: center;
}

/* CTA Section */
.cta {
    background-color: #007bff;
    color: white;
    padding: 60px 0;
    text-align: center;
}

.cta h2 {
    color: white;
    margin-bottom: 20px;
}

.cta p {
    color: #e9ecef;
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.cta-qr {
    margin-bottom: 30px;
}

.cta .qr-code {
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    display: inline-block;
    margin-bottom: 15px;
}

.cta .qr-placeholder {
    width: 150px;
    height: 150px;
    background: #fff;
    border: 2px solid #ddd;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.cta .qr-pattern {
    width: 120px;
    height: 120px;
    background: linear-gradient(45deg, #333 25%, transparent 25%),
                linear-gradient(-45deg, #333 25%, transparent 25%),
                linear-gradient(45deg, transparent 75%, #333 75%),
                linear-gradient(-45deg, transparent 75%, #333 75%);
    background-size: 15px 15px;
    background-position: 0 0, 0 7.5px, 7.5px -7.5px, -7.5px 0px;
    margin-bottom: 8px;
}

.cta .qr-placeholder p {
    color: #666;
    font-size: 12px;
    margin: 0;
    text-align: center;
}

.cta .qr-text {
    color: white;
    font-size: 1rem;
    margin: 0;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        text-align: center;
        margin-bottom: 40px;
    }
    
    .hero-content h2 {
        font-size: 2.5rem;
    }
    
    .hero-content h3 {
        font-size: 1.2rem;
    }
    
    .hero-buttons {
        display: flex;
        flex-direction: column;
        gap: 15px;
    }
    
    .btn-secondary {
        margin-left: 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    /* Partnership Section Responsive */
    .partnership-content {
        flex-direction: column;
        gap: 40px;
    }
    
    .partnership-text h2 {
        font-size: 2rem;
        text-align: center;
    }
    
    .partnership-text h3 {
        font-size: 1.5rem;
        text-align: center;
    }
    
    .partnership-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .partnership-qr {
        flex: none;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
    
    .qr-placeholder {
        width: 180px;
        height: 180px;
    }
    
    .qr-pattern {
        width: 140px;
        height: 140px;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.2rem; }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .features {
        padding: 60px 0;
    }
    
    .partnership-section {
        padding: 60px 0;
    }
    
    .partnership-text h2 {
        font-size: 1.8rem;
    }
    
    .partnership-text h3 {
        font-size: 1.3rem;
    }
    
    .partnership-text p {
        font-size: 1rem;
    }
    
    .partnership-benefits li {
        font-size: 1rem;
    }
    
    .qr-code {
        padding: 20px;
    }
    
    .qr-placeholder {
        width: 150px;
        height: 150px;
    }
    
    .qr-pattern {
        width: 120px;
        height: 120px;
    }
    
    .cta {
        padding: 40px 0;
    }
    
    .cta .qr-placeholder {
        width: 120px;
        height: 120px;
    }
    
    .cta .qr-pattern {
        width: 90px;
        height: 90px;
        background-size: 12px 12px;
    }
    
    .cta .qr-code {
        padding: 15px;
    }
    
    /* FAQ Section Responsive */
    .faq-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .faq-section {
        padding: 60px 0;
    }
    
    .faq-section h2 {
        font-size: 2rem;
    }
    
    .faq-question h3 {
        font-size: 1rem;
    }
    
    .faq-question {
        padding: 15px 20px;
    }
    
    .faq-item.active .faq-answer {
        padding: 15px 20px;
    }
}

/* FAQ Section */
.faq-section {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.faq-section h2 {
    text-align: center;
    color: #333;
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.faq-section > .container > p {
    text-align: center;
    color: #666;
    font-size: 1.2rem;
    margin-bottom: 50px;
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
}

.faq-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.faq-item {
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    transform: translateY(-2px);
}

.faq-question {
    padding: 20px 25px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background-color: #f8f9fa;
}

.faq-question h3 {
    color: #333;
    font-size: 1.1rem;
    margin: 0;
    font-weight: 600;
}

.faq-question i {
    color: #007bff;
    transition: transform 0.3s ease;
    font-size: 1.2rem;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

/* 默认展开状态的样式调整 */
.faq-item.active .faq-question i {
    transform: rotate(0deg);
}

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    background-color: #f8f9fa;
}

.faq-item.active .faq-answer {
    padding: 20px 25px;
    max-height: 300px;
}

.faq-answer p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

.faq-more {
    text-align: center;
}

.btn-outline {
    background: transparent;
    color: #007bff;
    border: 2px solid #007bff;
    padding: 12px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-outline:hover {
    background: #007bff;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,123,255,0.3);
}