* {
    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;
}

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

.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #2563eb;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    font-size: 28px;
    color: #2563eb;
}

.nav a {
    margin-left: 30px;
    text-decoration: none;
    color: #333;
    font-size: 14px;
    transition: color 0.3s;
}

.nav a:hover {
    color: #2563eb;
}

.hero {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #06b6d4 100%);
    color: #fff;
    padding: 150px 0 100px;
    text-align: center;
}

.hero-content h1 {
    font-size: 42px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content p {
    font-size: 18px;
    margin-bottom: 10px;
    opacity: 0.95;
}

.hero-content p:nth-of-type(1) {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.btn-primary {
    background: #fff;
    color: #2563eb;
    border: none;
    padding: 15px 40px;
    font-size: 16px;
    border-radius: 30px;
    cursor: pointer;
    margin-top: 30px;
    transition: transform 0.3s, box-shadow 0.3s;
    font-weight: 600;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.2);
}

.section-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #1e3a8a;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #2563eb, #06b6d4);
    margin: 15px auto 0;
    border-radius: 2px;
}

.products {
    padding: 80px 0;
    background: #f8fafc;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.product-item {
    background: #fff;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(37, 99, 235, 0.15);
}

.product-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.product-item h3 {
    font-size: 22px;
    color: #1e3a8a;
    margin-bottom: 15px;
}

.product-item > p {
    font-size: 14px;
    color: #64748b;
    margin-bottom: 20px;
    line-height: 1.8;
}

.product-item ul {
    text-align: left;
    list-style: none;
    padding: 0;
}

.product-item ul li {
    padding: 8px 0;
    color: #475569;
    font-size: 14px;
    border-bottom: 1px solid #e2e8f0;
    position: relative;
    padding-left: 20px;
}

.product-item ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

.product-item ul li:last-child {
    border-bottom: none;
}

.features {
    padding: 80px 0;
    background: #fff;
}

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

.feature-item {
    padding: 30px;
    border-radius: 12px;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 1px solid #bae6fd;
    transition: transform 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-item h3 {
    font-size: 20px;
    color: #0369a1;
    margin-bottom: 15px;
}

.feature-item p {
    font-size: 14px;
    color: #475569;
    line-height: 1.8;
}

.solutions {
    padding: 80px 0;
    background: #f1f5f9;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
}

.solution-item {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    transition: all 0.3s;
}

.solution-item:hover {
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.12);
    transform: translateY(-3px);
}

.solution-item h3 {
    font-size: 18px;
    color: #1e3a8a;
    margin-bottom: 12px;
}

.solution-item p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.7;
}

.services {
    padding: 80px 0;
    background: #fff;
}

.services-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.services-main h3,
.services-process h3 {
    font-size: 22px;
    color: #1e3a8a;
    margin-bottom: 25px;
}

.service-list {
    list-style: none;
}

.service-list li {
    padding: 20px;
    margin-bottom: 15px;
    background: #f8fafc;
    border-radius: 10px;
    border-left: 4px solid #2563eb;
    transition: all 0.3s;
}

.service-list li:hover {
    background: #f0f9ff;
    border-left-color: #06b6d4;
}

.service-list li strong {
    display: block;
    font-size: 16px;
    color: #1e3a8a;
    margin-bottom: 8px;
}

.service-list li p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.6;
}

.process-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.step-num {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 16px;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 16px;
    color: #1e3a8a;
    margin-bottom: 5px;
}

.step-content p {
    font-size: 13px;
    color: #64748b;
}

.about {
    padding: 80px 0;
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
    color: #fff;
}

.about .section-title {
    color: #fff;
}

.about .section-title::after {
    background: linear-gradient(90deg, #60a5fa, #67e8f9);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text p {
    font-size: 15px;
    line-height: 1.9;
    margin-bottom: 20px;
    opacity: 0.9;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.stat-item {
    background: rgba(255,255,255,0.1);
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    backdrop-filter: blur(10px);
}

.stat-num {
    font-size: 32px;
    font-weight: bold;
    color: #67e8f9;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.85;
}

.contact {
    padding: 80px 0;
    background: #f8fafc;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.contact-icon {
    font-size: 32px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-item h4 {
    font-size: 14px;
    color: #64748b;
    margin-bottom: 5px;
}

.contact-item p {
    font-size: 16px;
    color: #1e3a8a;
    font-weight: 500;
}

.contact-form {
    background: #fff;
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    margin-bottom: 15px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 14px;
    transition: border-color 0.3s;
    font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #2563eb;
}

.contact-form textarea {
    min-height: 120px;
    resize: vertical;
}

.contact-form .btn-primary {
    width: 100%;
    margin-top: 10px;
}

.footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 60px 0 20px;
}

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

.footer-col h4 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 15px;
}

.footer-col p {
    font-size: 14px;
    margin-bottom: 8px;
    transition: color 0.3s;
}

.footer-col p:hover {
    color: #67e8f9;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #1e293b;
}

.footer-bottom p {
    font-size: 13px;
}

@media (max-width: 968px) {
    .services-content,
    .contact-content,
    .about-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 28px;
    }

    .section-title {
        font-size: 24px;
    }

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

    .nav {
        display: none;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}