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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #0066cc 0%, #00c6ff 100%);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.4);
}

.btn-secondary {
    background: #fff;
    color: #0066cc;
    border: 2px solid #0066cc;
}

.btn-secondary:hover {
    background: #0066cc;
    color: #fff;
}

.site-header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo a {
    font-size: 24px;
    font-weight: 700;
    color: #0066cc;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 40px;
}

.main-nav a {
    font-size: 16px;
    color: #333;
    font-weight: 500;
}

.main-nav a:hover,
.main-nav a.active {
    color: #0066cc;
}

.header-cta .btn {
    padding: 8px 24px;
    font-size: 14px;
}

.hero-section {
    background: linear-gradient(135deg, #0066cc 0%, #00c6ff 100%);
    color: #fff;
    padding: 120px 0;
    text-align: center;
}

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

.hero-content p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

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

.hero-cta .btn-secondary {
    border-color: #fff;
    color: #fff;
}

.hero-cta .btn-secondary:hover {
    background: #fff;
    color: #0066cc;
}

.features-section {
    padding: 80px 0;
    background: #f9f9f9;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

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

.stats-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #0066cc 0%, #00c6ff 100%);
    color: #fff;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 18px;
    opacity: 0.9;
}

.feature-card {
    background: #fff;
    padding: 40px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

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

.feature-card p {
    color: #666;
    line-height: 1.8;
}

.cta-section {
    background: linear-gradient(135deg, #0066cc 0%, #00c6ff 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.cta-section h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

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

.cta-section .btn {
    background: #fff;
    color: #0066cc;
}

.cta-section .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.4);
}

.page-header {
    background: linear-gradient(135deg, #0066cc 0%, #00c6ff 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 48px;
    margin-bottom: 10px;
}

.page-header p {
    font-size: 20px;
    opacity: 0.9;
}

.service-intro {
    padding: 80px 0;
}

.service-intro h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

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

.intro-card {
    background: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.intro-number {
    font-size: 80px;
    font-weight: 700;
    color: rgba(0, 102, 204, 0.1);
    position: absolute;
    top: -20px;
    right: 20px;
}

.intro-card h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
    position: relative;
    z-index: 1;
}

.intro-card p {
    color: #666;
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

.service-types {
    padding: 80px 0;
    background: #f9f9f9;
}

.service-card {
    background: #fff;
    padding: 50px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    margin-bottom: 40px;
}

.service-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #f0f0f0;
}

.service-header h3 {
    font-size: 28px;
    color: #333;
}

.service-badge {
    background: linear-gradient(135deg, #0066cc 0%, #00c6ff 100%);
    color: #fff;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.service-problem,
.service-solution,
.service-process {
    margin-bottom: 30px;
}

.service-problem h4,
.service-solution h4,
.service-process h4 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #0066cc;
}

.service-problem p,
.service-solution p {
    color: #666;
    line-height: 1.8;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.step {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: #f9f9f9;
    border-radius: 4px;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #0066cc 0%, #00c6ff 100%);
    color: #fff;
    border-radius: 50%;
    font-size: 14px;
    font-weight: 600;
    flex-shrink: 0;
}

.step-text {
    color: #333;
    font-size: 14px;
}

.process-note {
    color: #999;
    font-size: 14px;
    font-style: italic;
}

.coverage-section {
    padding: 80px 0;
    text-align: center;
}

.coverage-section h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: #333;
}

.coverage-section > .container > p {
    font-size: 18px;
    color: #666;
    margin-bottom: 40px;
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.platform-item {
    padding: 20px;
    background: linear-gradient(135deg, #0066cc 0%, #00c6ff 100%);
    color: #fff;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.platform-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.4);
}

.tech-stack-section {
    padding: 80px 0;
    text-align: center;
}

.tech-stack-section h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: #333;
}

.tech-stack-section > .container > p {
    font-size: 18px;
    color: #666;
    margin-bottom: 40px;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
}

.tech-item {
    padding: 15px;
    background: linear-gradient(135deg, #0066cc 0%, #00c6ff 100%);
    color: #fff;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.tech-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.4);
}

.site-footer {
    background: #1a1a2e;
    color: #fff;
    padding: 60px 0 20px;
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    color: #fff;
}

.footer-section h3 {
    font-size: 24px;
}

.footer-section h4 {
    font-size: 18px;
}

.footer-section p {
    color: #aaa;
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-link {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    color: #fff;
    font-size: 14px;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: #0066cc;
    transform: translateY(-2px);
}

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

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

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

.footer-section ul li a:hover {
    color: #0066cc;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    color: #333;
}

.contact-icon {
    font-size: 24px;
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0066cc 0%, #00c6ff 100%);
    border-radius: 50%;
    color: #fff;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: #666;
    margin-bottom: 10px;
}

.footer-links {
    font-size: 14px;
}

.footer-links a {
    color: #666;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #0066cc;
}

.error-page {
    padding: 120px 0;
    text-align: center;
}

.error-page h1 {
    font-size: 120px;
    color: #0066cc;
    margin-bottom: 20px;
}

.error-page p {
    font-size: 18px;
    color: #666;
    margin-bottom: 30px;
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 20px;
    }

    .main-nav ul {
        gap: 20px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero-content h1 {
        font-size: 32px;
    }

    .hero-content p {
        font-size: 16px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .section-title {
        font-size: 28px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .intro-cards {
        grid-template-columns: 1fr;
    }

    .service-card {
        padding: 30px;
    }

    .service-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .process-steps {
        grid-template-columns: 1fr;
    }
}

.cases-section {
    padding: 80px 0;
}

.case-item {
    background: #fff;
    padding: 50px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    margin-bottom: 40px;
}

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

.case-desc {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.case-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 4px;
}

.case-stat {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stat-label {
    font-size: 14px;
    color: #999;
    font-weight: 500;
}

.stat-number {
    font-size: 16px;
    color: #333;
    font-weight: 600;
}

.case-content {
    margin-top: 30px;
}

.case-content h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #0066cc;
}

.case-content p {
    font-size: 15px;
    color: #666;
    line-height: 1.8;
}