:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #10b981;
    --dark: #1f2937;
    --light: #f9fafb;
    --gray: #6b7280;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-alt: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: #f8fafc;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
header {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.8rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.logo i {
    margin-right: 10px;
    font-size: 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

.cta-button {
    background: var(--gradient);
    color: white;
    border: none;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.2);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark);
    cursor: pointer;
}

/* 英雄区域 */
.hero {
    padding: 100px 0 80px;
    text-align: center;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(236, 72, 153, 0.05) 100%);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.2;
}

.hero p {
    font-size: 1.25rem;
    color: var(--gray);
    max-width: 800px;
    margin: 0 auto 40px;
}

.highlight {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--secondary);
    padding: 5px 10px;
    border-radius: 5px;
    font-weight: 600;
}

/* 特性区域 */
.features {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--dark);
}

.section-subtitle {
    text-align: center;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto 60px;
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.8rem;
    color: white;
}

.feature-1 .feature-icon {
    background: var(--gradient);
}

.feature-2 .feature-icon {
    background: var(--gradient-alt);
}

.feature-3 .feature-icon {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark);
}

/* AI模型展示 */
.ai-models {
    padding: 80px 0;
    background-color: rgba(99, 102, 241, 0.03);
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.model-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

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

.model-header {
    padding: 25px 25px 15px;
    border-bottom: 1px solid #e5e7eb;
}

.model-name {
    display: flex;
    align-items: center;
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.model-name i {
    margin-right: 10px;
    color: var(--primary);
}

.model-type {
    display: inline-block;
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.model-description {
    padding: 20px 25px;
    color: var(--gray);
    min-height: 120px;
}

.model-footer {
    padding: 0 25px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
}

.price-unit {
    font-size: 0.9rem;
    color: var(--gray);
    font-weight: 500;
}

/* 定价区域 */
.pricing {
    padding: 80px 0;
}

.pricing-cards {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 50px;
}

.pricing-card {
    background: white;
    border-radius: 12px;
    padding: 40px 30px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 350px;
    text-align: center;
    position: relative;
}

.pricing-card.popular {
    border: 2px solid var(--primary);
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient);
    color: white;
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.pricing-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.price-amount {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 10px;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.price-details {
    list-style: none;
    margin: 30px 0;
    text-align: left;
}

.price-details li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.price-details i {
    color: var(--secondary);
    margin-right: 10px;
}

/* CTA区域 */
.cta-section {
    padding: 100px 0;
    background: var(--gradient);
    color: white;
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.cta-section p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 40px;
    opacity: 0.9;
}

.cta-button.light {
    background: white;
    color: var(--primary);
}

/* 页脚 */
footer {
    background-color: var(--dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: white;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

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

.footer-links a:hover {
    color: white;
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #374151;
    color: #9ca3af;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-cards {
        flex-direction: column;
        align-items: center;
    }
    
    .pricing-card.popular {
        transform: none;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        transform: translateY(-150%);
        transition: transform 0.3s;
        z-index: 999;
    }
    
    .nav-links.active {
        transform: translateY(0);
    }
    
    .nav-links li {
        margin: 15px 0;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* 内容页面样式 */
.content-page {
    padding: 100px 0 80px;
}

.content-header {
    text-align: center;
    margin-bottom: 60px;
}

.content-header h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.content-header p {
    font-size: 1.2rem;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto;
}

.content-section {
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.content-section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--dark);
    border-bottom: 2px solid var(--primary);
    padding-bottom: 10px;
}

.content-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 30px 0 15px;
    color: var(--dark);
}

.content-section p {
    margin-bottom: 15px;
    color: var(--gray);
    line-height: 1.8;
}

.content-section ul, .content-section ol {
    margin: 20px 0;
    padding-left: 30px;
}

.content-section li {
    margin-bottom: 10px;
    color: var(--gray);
    line-height: 1.8;
}

.content-section a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s;
}

.content-section a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.faq-item {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e5e7eb;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-item h3 {
    color: var(--primary);
    margin-bottom: 10px;
}

.status-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: #f9fafb;
    border-radius: 8px;
    margin-bottom: 15px;
}

.status-indicator {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 10px;
}

.status-indicator.operational {
    background-color: var(--secondary);
}

.status-indicator.degraded {
    background-color: #f59e0b;
}

.status-indicator.down {
    background-color: #ef4444;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary);
    text-decoration: none;
    margin-bottom: 30px;
    font-weight: 500;
    transition: color 0.3s;
}

.back-link:hover {
    color: var(--primary-dark);
}

.back-link i {
    margin-right: 8px;
}

.content-section pre {
    background: #f3f4f6;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 15px 0;
    border-left: 4px solid var(--primary);
}

.content-section code {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--dark);
}

.content-section table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: white;
}

.content-section table thead {
    background: #f3f4f6;
}

.content-section table th {
    padding: 12px;
    text-align: left;
    border: 1px solid #e5e7eb;
    font-weight: 600;
    color: var(--dark);
}

.content-section table td {
    padding: 12px;
    border: 1px solid #e5e7eb;
    color: var(--gray);
}

.content-section table tbody tr:hover {
    background: #f9fafb;
}

.content-section table code {
    background: #f3f4f6;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85rem;
}