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

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

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

header {
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #3b82f6 100%);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    display: flex;
    align-items: center;
    color: white;
}

.logo-icon {
    height: 40px;
    width: auto;
    margin-right: 4px;
    filter: none;
}

.logo-text {
    font-size: 18px;
    font-weight: bold;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 35px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #ffd700;
}

.hero {
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #3b82f6 100%);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

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

.hero-text {
    flex: 1;
}

.hero-text h1 {
    color: white;
    font-size: 42px;
    font-weight: bold;
    margin-bottom: 10px;
    line-height: 1.3;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.laptop-illustration {
    position: relative;
    width: 350px;
    height: 250px;
}

.screen {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    width: 320px;
    height: 200px;
    border-radius: 15px 15px 0 0;
    padding: 15px;
    position: relative;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.screen-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    height: 100%;
}

.chart {
    background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
    border-radius: 8px;
    position: relative;
}

.graph {
    background: linear-gradient(135deg, #f472b6 0%, #ec4899 100%);
    border-radius: 8px;
    position: relative;
}

.data-block {
    background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
    border-radius: 8px;
    grid-column: span 2;
    position: relative;
}

.keyboard {
    background: #374151;
    width: 350px;
    height: 40px;
    border-radius: 0 0 15px 15px;
    position: absolute;
    bottom: 10px;
    left: -15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.base {
    background: #4b5563;
    width: 280px;
    height: 10px;
    border-radius: 5px;
    position: absolute;
    bottom: 0;
    left: 35px;
}

.hero-decoration {
    position: absolute;
    top: 0;
    right: 0;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    pointer-events: none;
}

.section-title {
    text-align: center;
    font-size: 28px;
    color: #333;
    margin-bottom: 40px;
    position: relative;
    padding-bottom: 10px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #3b82f6, #60a5fa);
    border-radius: 2px;
}

.about {
    padding: 80px 0;
    background: white;
}

.about-content {
    display: flex;
    gap: 60px;
    align-items: flex-start;
}

.about-text {
    flex: 2;
}

.about-text p {
    font-size: 14px;
    line-height: 2;
    color: #555;
    margin-bottom: 20px;
    text-align: justify;
}

.about-certificate {
    flex: 1;
    display: flex;
    justify-content: center;
}

.certificate-image {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

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

.products-slider {
    display: flex;
    justify-content: center;
}

.products-container {
    display: flex;
    gap: 40px;
}

.product-card {
    display: inline-block;
}

.product-icon {
    font-size: 56px;
    margin-bottom: 15px;
}

.product-image {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
}

.product-name {
    color: white;
    font-size: 16px;
    font-weight: bold;
}

.product-name-large {
    color: white;
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 10px;
}

.product-desc {
    color: rgba(255,255,255,0.9);
    font-size: 14px;
    line-height: 1.6;
}

.services {
    padding: 80px 0;
    background: white;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.service-card {
    background: white;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    padding: 20px;
    position: relative;
    transition: all 0.3s;
}

.service-card:hover {
    border-color: #3b82f6;
    box-shadow: 0 5px 20px rgba(59,130,246,0.15);
}

.service-tag {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: white;
    font-size: 14px;
    font-weight: bold;
    padding: 5px 15px;
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 15px;
}

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

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

.clients-image {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

footer {
    background: #1a1a1a;
    padding: 60px 0;
    color: #fff;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-section h3 {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #fff;
}

.footer-section p {
    font-size: 14px;
    color: #999;
    margin-bottom: 10px;
    line-height: 1.8;
}

.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: #ffd700;
}

.qr-codes {
    display: flex;
    gap: 20px;
}

.qr-code {
    text-align: center;
}

.qr-placeholder {
    width: 100px;
    height: 100px;
    background: #333;
    border-radius: 10px;
    margin-bottom: 10px;
    position: relative;
}

.qr-image {
    width: 100px;
    height: 100px;
    border-radius: 10px;
    margin-bottom: 10px;
    display: block;
}

.qr-placeholder::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    border: 2px dashed #666;
    border-radius: 5px;
}

.qr-code span {
    font-size: 12px;
    color: #999;
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        text-align: center;
    }

    nav ul {
        margin-top: 15px;
    }

    nav ul li {
        margin: 0 10px;
    }

    .hero-content {
        flex-direction: column;
        text-align: center;
    }

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

    .hero-image {
        margin-top: 40px;
        justify-content: center;
    }

    .about-content {
        flex-direction: column;
        gap: 40px;
    }

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

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

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

    .qr-codes {
        justify-content: center;
    }
}