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

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

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

/* 导航栏样式 */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo {
    color: #fff;
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 30px;
}

.nav-links li a {
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

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

.auth-buttons {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 8px 20px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: #fff;
    color: #667eea;
}

.btn-primary:hover {
    background: #f0f0f0;
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 1px solid #fff;
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.1);
}

/* Hero区域样式 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 120px 0 80px;
    text-align: center;
    color: #fff;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.btn-large {
    padding: 15px 40px;
    border-radius: 30px;
    font-size: 16px;
}

/* 功能特性区域 */
.features {
    padding: 80px 0;
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 36px;
    margin-bottom: 15px;
    color: #333;
}

.section-title p {
    color: #666;
    font-size: 16px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.feature-card img {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
    border-radius: 10px;
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.feature-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 解决方案区域 */
.solutions {
    padding: 80px 0;
}

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

.solution-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

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

.solution-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.solution-content {
    padding: 25px;
}

.solution-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.solution-content p {
    font-size: 14px;
    color: #666;
    margin-bottom: 15px;
}

.solution-content a {
    color: #667eea;
    text-decoration: none;
    font-size: 14px;
}

/* 客户评价区域 */
.testimonials {
    padding: 80px 0;
    background: #f8f9fa;
}

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

.testimonial-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.testimonial-card p {
    font-size: 14px;
    color: #666;
    margin-bottom: 20px;
    line-height: 1.8;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.testimonial-author img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.author-info h4 {
    font-size: 16px;
    color: #333;
}

.author-info p {
    font-size: 12px;
    color: #999;
    margin: 0;
}

/* 底部样式 */
footer {
    background: #333;
    color: #fff;
    padding: 60px 0 30px;
}

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

.footer-section h3 {
    font-size: 18px;
    margin-bottom: 20px;
}

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

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

.footer-section ul li a {
    color: #999;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

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

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 20px;
    text-align: center;
    color: #666;
    font-size: 14px;
}

/* 登录注册页面样式 */
.auth-container {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.auth-box {
    background: #fff;
    padding: 50px;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.auth-box h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
    font-size: 28px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: #333;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.auth-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    margin-bottom: 20px;
    transition: opacity 0.3s;
}

.auth-btn:hover {
    opacity: 0.9;
}

.auth-link {
    text-align: center;
    font-size: 14px;
}

.auth-link a {
    color: #667eea;
    text-decoration: none;
}

.auth-link a:hover {
    text-decoration: underline;
}

/* 产品页面样式 */
.product-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 100px 0 40px;
    margin-top: 60px;
}

.product-header h1 {
    font-size: 36px;
    margin-bottom: 15px;
}

.product-header p {
    font-size: 16px;
    opacity: 0.9;
}

.product-features {
    padding: 60px 0;
}

.product-feature-item {
    display: flex;
    gap: 40px;
    align-items: center;
    margin-bottom: 50px;
}

.product-feature-item:nth-child(even) {
    flex-direction: row-reverse;
}

.product-feature-item img {
    width: 50%;
    border-radius: 10px;
}

.product-feature-content {
    flex: 1;
}

.product-feature-content h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #333;
}

.product-feature-content p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

.product-feature-content ul {
    list-style: none;
    margin-top: 20px;
}

.product-feature-content ul li {
    padding: 8px 0;
    font-size: 14px;
    color: #555;
}

.product-feature-content ul li::before {
    content: '✓';
    color: #667eea;
    margin-right: 10px;
}

/* 解决方案页面样式 */
.solution-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 100px 0 40px;
    margin-top: 60px;
}

.solution-header h1 {
    font-size: 36px;
    margin-bottom: 15px;
}

.solution-categories {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.solution-category {
    padding: 10px 30px;
    background: rgba(255,255,255,0.2);
    border-radius: 20px;
    color: #fff;
    cursor: pointer;
    transition: background 0.3s;
}

.solution-category:hover,
.solution-category.active {
    background: #fff;
    color: #667eea;
}

.solution-detail {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.solution-detail h2 {
    font-size: 28px;
    margin-bottom: 20px;
    color: #333;
}

.solution-detail p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.solution-benefits {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.benefit-item {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
}

.benefit-item h4 {
    font-size: 16px;
    margin-bottom: 10px;
    color: #333;
}

.benefit-item p {
    font-size: 13px;
    color: #666;
    margin: 0;
}

/* 价格页面样式 */
.pricing-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 100px 0 40px;
    margin-top: 60px;
}

.pricing-header h1 {
    font-size: 36px;
    margin-bottom: 15px;
}

.pricing-header p {
    font-size: 16px;
    opacity: 0.9;
}

.pricing-plans {
    padding: 60px 0;
}

.pricing-plans .container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    align-items: start;
}

.pricing-card {
    background: #fff;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    text-align: center;
    position: relative;
}

.pricing-card.featured {
    border: 2px solid #667eea;
    transform: scale(1.05);
}

.pricing-card.featured::before {
    content: '推荐';
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 12px;
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
}

.pricing-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

.pricing-card .price {
    font-size: 48px;
    color: #667eea;
    margin-bottom: 5px;
}

.pricing-card .period {
    font-size: 14px;
    color: #999;
    margin-bottom: 30px;
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 30px;
}

.pricing-card ul li {
    padding: 10px 0;
    font-size: 14px;
    color: #666;
    border-bottom: 1px solid #eee;
}

.pricing-card ul li:last-child {
    border-bottom: none;
}

/* 关于页面样式 */
.about-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 100px 0 40px;
    margin-top: 60px;
}

.about-header h1 {
    font-size: 36px;
    margin-bottom: 15px;
}

.about-content {
    padding: 60px 0;
}

.about-section {
    margin-bottom: 50px;
}

.about-section h2 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
}

.about-section p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 10px;
}

.stat-item .number {
    font-size: 48px;
    color: #667eea;
    margin-bottom: 10px;
}

.stat-item .label {
    font-size: 14px;
    color: #666;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero h1 {
        font-size: 32px;
    }
    
    .features-grid,
    .solutions-grid,
    .testimonials-grid,
    .footer-content,
    .pricing-plans,
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .product-feature-item,
    .product-feature-item:nth-child(even) {
        flex-direction: column;
    }
    
    .product-feature-item img {
        width: 100%;
        margin-bottom: 20px;
    }
    
    .solution-benefits {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: none;
    }
}