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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8fafc;
}

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

/* Header Styles */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar {
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    color: white;
    font-size: 1.8rem;
    font-weight: 700;
}

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

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #ffd700;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 120px 0 80px;
    color: white;
    margin-top: 70px;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.ssl-badge {
    background: rgba(255,255,255,0.2);
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 20px;
    padding: 2rem 3rem;
    font-size: 2rem;
    font-weight: bold;
    text-align: center;
    backdrop-filter: blur(10px);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background: #ffd700;
    color: #333;
}

.btn-primary:hover {
    background: #ffed4e;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255,215,0,0.4);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #667eea;
}

.btn-block {
    display: block;
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-block:hover {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46a1 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102,126,234,0.4);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-premium {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: #333;
    font-weight: 700;
}

.btn-premium:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255,215,0,0.5);
}

/* Button State Enhancements */
.btn:not(.btn-secondary):not(.btn-premium) {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn:not(.btn-secondary):not(.btn-premium):hover {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46a1 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102,126,234,0.4);
}

/* Loading State for Buttons */
.btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    margin: auto;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 2px solid transparent;
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #2d3748;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: #718096;
    margin-bottom: 3rem;
}

/* Products Section */
.products {
    background: white;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.product-card {
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
    border-color: #667eea;
}

.product-card.featured {
    border-color: #ffd700;
    box-shadow: 0 10px 30px rgba(255,215,0,0.2);
}

.product-card.featured::before {
    content: '推荐';
    position: absolute;
    top: 20px;
    right: -30px;
    background: #ff6b6b;
    color: white;
    padding: 5px 40px;
    transform: rotate(45deg);
    font-weight: bold;
    font-size: 0.9rem;
}

.product-header {
    margin-bottom: 1.5rem;
    position: relative;
}

.product-header h3 {
    font-size: 1.5rem;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.product-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-popular { background: #e3f2fd; color: #1976d2; }
.badge-recommended { background: #e8f5e8; color: #2e7d32; }
.badge-premium { background: #fff3e0; color: #f57c00; }
.badge-value { background: #fce4ec; color: #c2185b; }
.badge-flexible { background: #f3e5f5; color: #7b1fa2; }
.badge-developer { background: #e0f2f1; color: #00695c; }
.badge-ip { background: #e8eaf6; color: #3f51b5; }
.badge-national { background: #ffebee; color: #c62828; }
.badge-email { background: #e0f7fa; color: #00acc1; }
.badge-client { background: #f1f8e9; color: #558b2f; }
.badge-pdf { background: #fce4ec; color: #ad1457; }

.product-price {
    margin-bottom: 2rem;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    color: #667eea;
}

.period {
    font-size: 1rem;
    color: #718096;
}

.product-features {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.product-features li {
    padding: 0.5rem 0;
    color: #4a5568;
    border-bottom: 1px solid #e2e8f0;
}

.product-features li:last-child {
    border-bottom: none;
}

/* Features Section */
.features {
    background: #f7fafc;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.feature-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-item h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #2d3748;
}

.feature-item p {
    color: #718096;
    line-height: 1.6;
}

/* Process Section */
.process {
    background: white;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

.step h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #2d3748;
}

.step p {
    color: #718096;
}

/* FAQ Section */
.faq {
    background: #f7fafc;
}

.faq-list {
    max-width: 800px;
    margin: 3rem auto 0;
}

.faq-item {
    background: white;
    padding: 2rem;
    margin-bottom: 1rem;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.faq-item h3 {
    color: #2d3748;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.faq-item p {
    color: #718096;
    line-height: 1.7;
}

/* Contact Section */
.contact {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.contact .section-title {
    color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-top: 3rem;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.contact-info p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.1rem;
}

.contact-icon {
    font-size: 1.5rem;
}

.cta-box {
    background: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
}

.cta-box h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.cta-box p {
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* Footer */
.footer {
    background: #2d3748;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: #ffd700;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #ffd700;
}

.security-badges {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.badge {
    background: rgba(255,255,255,0.1);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    text-align: center;
    transition: all 0.3s ease;
}

.badge:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

.badge {
    background: rgba(255,255,255,0.1);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    text-align: center;
}

.footer-bottom {
    border-top: 1px solid #4a5568;
    padding-top: 2rem;
    text-align: center;
    color: #a0aec0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(102, 126, 234, 0.95);
        flex-direction: column;
        padding: 1rem;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .contact-methods {
        align-items: center;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .brands-grid {
        grid-template-columns: 1fr;
    }
    
    .brand-features {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        text-align: center;
        gap: 1.5rem;
    }
    
    .comparison-table {
        font-size: 0.9rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 0.75rem 0.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .security-badges {
        align-items: center;
    }
    
    .brands-comparison {
        padding: 1rem;
    }
    
    .comparison-table {
        font-size: 0.8rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 0.5rem 0.25rem;
    }
    
    .brand-card {
        padding: 1.5rem;
    }
    
    .brand-logo h3 {
        font-size: 1.5rem;
    }
    
    .product-tags {
        justify-content: center;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading State */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Brands Section */
.brands {
    background: white;
    padding: 80px 0;
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.brand-card {
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.brand-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
    border-color: #667eea;
}

.brand-card.featured-brand {
    border-color: #ffd700;
    box-shadow: 0 10px 30px rgba(255,215,0,0.2);
}

.brand-card.featured-brand::before {
    content: '国密推荐';
    position: absolute;
    top: 20px;
    right: -30px;
    background: #ff6b6b;
    color: white;
    padding: 5px 40px;
    transform: rotate(45deg);
    font-weight: bold;
    font-size: 0.9rem;
}

.brand-logo {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.brand-logo h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2d3748;
    margin: 0;
}

.brand-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-enterprise { background: #f3e5f5; color: #6a1b9a; }
.badge-budget { background: #fff3e0; color: #e65100; }
.badge-experienced { background: #e8f5e8; color: #2e7d32; }
.badge-reliable { background: #e0f2f1; color: #00695c; }

.brand-info {
    margin-bottom: 1.5rem;
}

.brand-info p {
    color: #4a5568;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.brand-features {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.brand-features li {
    color: #718096;
    font-size: 0.9rem;
    padding: 0.25rem 0;
}

.brand-products {
    margin-bottom: 1.5rem;
}

.brand-products h4 {
    font-size: 1rem;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: #edf2f7;
    color: #4a5568;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Comparison Table */
.brands-comparison {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 16px;
    margin-top: 3rem;
}

.brands-comparison h3 {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: #2d3748;
}

.comparison-table {
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.comparison-table th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table tr:hover {
    background: #f7fafc;
}

/* Enhanced Button Styles */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

/* Focus States */
.btn:focus,
a:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}