/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基础样式 */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: #e5e5e5;
    background-color: #0a0a0a;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    height: 70px;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo {
    width: 32px;
    height: 32px;
}

.logo-text {
    font-size: 20px;
    font-weight: 600;
    color: #fff;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: #a0a0a0;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: #fff;
}

.nav-actions {
    display: flex;
    align-items: center;
}

.download-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    background: #1f1f1f;
    color: #fff;
}

.download-btn.primary {
    background: #fff;
    color: #000;
}

.download-btn.primary:hover {
    background: #e0e0e0;
}

.download-btn.large {
    padding: 15px 30px;
    font-size: 16px;
}

/* 主页横幅 */
.hero-section {
    padding: 150px 0 100px;
    text-align: center;
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    color: white;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(45deg, #fff, #e0e0e0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.platform-text {
    font-size: 14px;
    opacity: 0.8;
}

/* 功能介绍 */
.features-section {
    padding: 100px 0;
}

.feature-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 120px;
}

.feature-item.reverse {
    direction: rtl;
}

.feature-item.reverse > * {
    direction: ltr;
}

.feature-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #fff;
}

.feature-description {
    font-size: 1.125rem;
    color: #a0a0a0;
    line-height: 1.7;
}

.feature-demo {
    text-align: center;
}

.feature-demo img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* 产品优势 */
.advantages-section {
    padding: 100px 0;
    background: #111111;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
    color: #fff;
}

.section-subtitle {
    font-size: 1.25rem;
    text-align: center;
    color: #a0a0a0;
    margin-bottom: 60px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

.advantage-card {
    background: #1a1a1a;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease;
    border: 1px solid #333;
}

.advantage-card:hover {
    transform: translateY(-5px);
    border-color: #4f46e5;
}

.advantage-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #fff;
}

.advantage-card p {
    color: #a0a0a0;
    line-height: 1.6;
}

/* 用户评价 */
.testimonials-section {
    padding: 100px 0;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 12px;
    border-left: 4px solid #667eea;
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 20px;
    color: #333;
    line-height: 1.6;
}

.testimonial-author strong {
    display: block;
    color: #000;
    margin-bottom: 5px;
}

.testimonial-author span {
    color: #666;
    font-size: 14px;
}

/* 定价 */
.pricing-section {
    padding: 100px 0;
    background: #0a0a0a;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: #1a1a1a;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    text-align: center;
    position: relative;
    border: 1px solid #333;
}

.pricing-card.featured {
    border: 2px solid #4f46e5;
    transform: scale(1.05);
}

.pricing-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

.price {
    margin-bottom: 30px;
}

.currency {
    font-size: 1.25rem;
    vertical-align: top;
}

.amount {
    font-size: 3rem;
    font-weight: 700;
    color: #fff;
}

.period {
    font-size: 1rem;
    color: #a0a0a0;
}

.features-list {
    list-style: none;
    margin-bottom: 30px;
}

.features-list li {
    padding: 8px 0;
    color: #a0a0a0;
}

.features-list li:before {
    content: "✓";
    color: #4f46e5;
    font-weight: bold;
    margin-right: 10px;
}

.pricing-btn {
    width: 100%;
    padding: 12px 24px;
    border: 1px solid #444;
    border-radius: 8px;
    background: #2a2a2a;
    color: #fff;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.pricing-btn.primary {
    background: #4f46e5;
    color: white;
    border-color: #4f46e5;
}

.pricing-btn:hover {
    background: #333;
}

.pricing-btn.primary:hover {
    background: #3730a3;
}

/* 企业方案 */
.enterprise-section {
    padding: 100px 0;
}

.enterprise-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.enterprise-feature {
    text-align: center;
}

.enterprise-feature h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #fff;
}

.enterprise-feature p {
    color: #a0a0a0;
    line-height: 1.6;
}

.enterprise-cta {
    text-align: center;
}

.contact-btn {
    padding: 15px 40px;
    border: none;
    border-radius: 8px;
    background: #4f46e5;
    color: white;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease;
}

.contact-btn:hover {
    background: #3730a3;
}

/* 页脚 */
.footer {
    background: #111111;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    margin-bottom: 20px;
    font-weight: 600;
}

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

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

.footer-section ul li a {
    color: #a0a0a0;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-logo {
    width: 32px;
    height: 32px;
    margin-bottom: 15px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #444;
    color: #a0a0a0;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: #1a1a1a;
    margin: 10% auto;
    padding: 40px;
    border-radius: 12px;
    width: 80%;
    max-width: 600px;
    position: relative;
    border: 1px solid #333;
}

.close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: #a0a0a0;
}

.close:hover {
    color: #fff;
}

.download-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.download-option {
    text-align: center;
    padding: 30px;
    border: 1px solid #444;
    border-radius: 12px;
    transition: border-color 0.2s ease;
    background: #1f1f1f;
}

.download-option:hover {
    border-color: #4f46e5;
}

.download-option img {
    width: 48px;
    height: 48px;
    margin-bottom: 15px;
}

.download-option h3 {
    margin-bottom: 10px;
    color: #fff;
}

.download-option p {
    color: #a0a0a0;
    font-size: 14px;
    margin-bottom: 20px;
}

.download-platform-btn {
    width: 100%;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    background: #4f46e5;
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease;
}

.download-platform-btn:hover {
    background: #3730a3;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .feature-item {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .feature-item.reverse {
        direction: ltr;
    }
    
    .feature-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .modal-content {
        width: 95%;
        margin: 5% auto;
        padding: 20px;
    }
    
    .download-options {
        grid-template-columns: 1fr;
    }
}