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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: white;
}

.header {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.nav-content {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

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

.nav-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 0.8;
}

.hero {
    background: linear-gradient(rgba(30, 60, 114, 0.8), rgba(42, 82, 152, 0.8)), url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><rect fill="%23f0f4f8" width="1200" height="600"/><circle fill="%23dde7f0" cx="200" cy="150" r="50"/><circle fill="%23c8d6e5" cx="800" cy="300" r="80"/><circle fill="%23b3c5d7" cx="1000" cy="100" r="40"/></svg>');
    color: white;
    padding: 8rem 2rem 4rem;
    text-align: center;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

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

.cta-button {
    background: #ff6b35;
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    text-decoration: none;
    display: inline-block;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(255, 107, 53, 0.3);
}

.content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.section {
    margin-bottom: 4rem;
}

.section h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: #1e3c72;
}

/* 我们的专业解决方案 - 保持原有卡片布局 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s;
    border: 1px solid #f0f4f8;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

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

.feature h3 {
    color: #1e3c72;
    margin-bottom: 1rem;
}

/* 为什么选择我们 - 横向时间线布局 */
.why-choose-us {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 4rem 2rem;
    margin: 4rem -2rem;
    border-radius: 20px;
}

.why-choose-timeline {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    position: relative;
}

.timeline-item {
    display: flex;
    align-items: center;
    gap: 3rem;
    position: relative;
}

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

.timeline-icon {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    box-shadow: 0 8px 25px rgba(30, 60, 114, 0.3);
    position: relative;
    z-index: 2;
}

.timeline-content {
    flex: 1;
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 0;
    height: 0;
    border: 15px solid transparent;
    transform: translateY(-50%);
}

.timeline-item:nth-child(odd) .timeline-content::before {
    left: -30px;
    border-right-color: white;
}

.timeline-item:nth-child(even) .timeline-content::before {
    right: -30px;
    border-left-color: white;
}

.timeline-content h3 {
    color: #1e3c72;
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.timeline-content ul {
    list-style: none;
    padding: 0;
}

.timeline-content li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.timeline-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #ff6b35;
    font-weight: bold;
}

/* 服务内容 - 分层卡片布局 */
.services-section {
    background: white;
    padding: 4rem 0;
}

.services-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    perspective: 1000px;
}

.service-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 2rem;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.3);
    transition: all 0.4s ease;
    transform-style: preserve-3d;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.service-card:hover::before {
    opacity: 1;
}

.service-card:hover {
    transform: translateY(-10px) rotateX(5deg);
    box-shadow: 0 25px 50px rgba(102, 126, 234, 0.4);
}

.service-card:nth-child(2) {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    box-shadow: 0 15px 35px rgba(240, 147, 251, 0.3);
}

.service-card:nth-child(2):hover {
    box-shadow: 0 25px 50px rgba(240, 147, 251, 0.4);
}

.service-card:nth-child(3) {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    box-shadow: 0 15px 35px rgba(79, 172, 254, 0.3);
}

.service-card:nth-child(3):hover {
    box-shadow: 0 25px 50px rgba(79, 172, 254, 0.4);
}

.service-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: block;
    text-align: center;
}

.service-card h3 {
    font-size: 1.6rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.service-card ul {
    list-style: none;
    padding: 0;
}

.service-card li {
    padding: 0.8rem 0;
    padding-left: 2rem;
    position: relative;
    font-size: 1.1rem;
}

.service-card li::before {
    content: '→';
    position: absolute;
    left: 0;
    font-weight: bold;
    color: rgba(255,255,255,0.8);
}

.pain-points {
    background: #f8fafc;
    padding: 4rem 2rem;
    margin: 4rem -2rem;
}

.pain-point {
    background: white;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-left: 4px solid #ff6b35;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
    margin: 3rem 0;
}

.stat {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: 10px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    display: block;
}

.footer {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    padding: 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-text {
    text-align: left;
}

.footer-text p {
    margin-bottom: 0.5rem;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    color: white;
    transition: all 0.3s ease;
    padding: 0.75rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
}

.footer-social a:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(255, 255, 255, 0.1);
}

.page-content {
    display: none;
}

.page-content.active {
    display: block;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 0.5rem;
        font-size: 0.9rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    /* 移动端优化 */
    .timeline-item {
        flex-direction: column !important;
        text-align: center;
    }
    
    .timeline-item:nth-child(even) {
        flex-direction: column !important;
    }
    
    .timeline-content::before {
        display: none;
    }
    
    .services-container {
        grid-template-columns: 1fr;
    }
    
    .service-card:hover {
        transform: translateY(-5px);
    }
}


.analysis-reports {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.analysis-reports h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

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

.report-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    position: relative;
    transition: transform 0.3s ease;
}

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

.report-card.featured {
    border: 3px solid #667eea;
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: -10px;
    right: 20px;
    background: #667eea;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
}

.report-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: #333;
}

.price {
    font-size: 2.5rem;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 1.5rem;
}

.features {
    list-style: none;
    padding: 0;
    margin-bottom: 2rem;
}

.features li {
    padding: 0.5rem 0;
    color: #666;
}

.buy-button {
    display: block;
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    text-align: center;
    font-weight: bold;
    transition: all 0.3s ease;
}

.buy-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}