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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

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

.header {
    border-bottom: 1px solid #fff;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #fff;
    padding: 15px 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo h1 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 2px;
}

.logo .tagline {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
}

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

.nav a {
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav a:hover,
.nav a.active {
    color: #4fc3f7;
}

.hero {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #fff;
    padding: 120px 0 100px;
    text-align: center;
}

.hero-content h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.3;
}

.hero-content p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

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

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #4fc3f7 0%, #29b6f6 100%);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(79, 195, 247, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

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

.btn-outline {
    background: transparent;
    color: #16213e;
    border: 2px solid #16213e;
}

.btn-outline:hover {
    background: #16213e;
    color: #fff;
}

.section-title {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 50px;
    color: #16213e;
}

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

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

.product-card {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid #eee;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

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

.product-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: #16213e;
    margin-bottom: 15px;
}

.product-card p {
    font-size: 14px;
    color: #666;
    margin-bottom: 20px;
    line-height: 1.7;
}

.product-features {
    list-style: none;
    margin-bottom: 25px;
}

.product-features li {
    font-size: 14px;
    color: #555;
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
}

.product-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #4fc3f7;
    font-weight: bold;
}

.about {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e8f4f8 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    font-size: 15px;
    color: #555;
    margin-bottom: 15px;
    line-height: 1.8;
}

.about-text .section-title {
    text-align: left;
    margin-bottom: 30px;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.stat-item {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.05);
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: #4fc3f7;
    margin-bottom: 5px;
}

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

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

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.contact-icon {
    font-size: 28px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #4fc3f7 0%, #29b6f6 100%);
    border-radius: 50%;
    color: #fff;
}

.contact-content {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: 13px;
    color: #888;
    margin-bottom: 2px;
}

.contact-value {
    font-size: 15px;
    font-weight: 600;
    color: #333;
}

.contact-note {
    background: linear-gradient(135deg, #f0f9ff 0%, #e1f5fe 100%);
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    border-left: 4px solid #4fc3f7;
}

.contact-note p {
    font-size: 14px;
    color: #555;
    line-height: 1.7;
}

.footer {
    background: #16213e;
    color: rgba(255, 255, 255, 0.7);
    padding: 30px 0;
    text-align: center;
}

.footer p {
    font-size: 13px;
    margin-bottom: 5px;
}

.footer p:last-child {
    margin-bottom: 0;
}

.footer a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
}

.footer a:hover {
    color: #4fc3f7;
    text-decoration: underline;
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }

    .nav ul {
        gap: 20px;
    }

    .nav a {
        font-size: 13px;
    }

    .hero {
        padding: 160px 0 80px;
    }

    .hero-content h2 {
        font-size: 26px;
    }

    .hero-content p {
        font-size: 14px;
    }

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-text .section-title {
        text-align: center;
    }

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

    .product-card {
        padding: 25px;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }

    .contact-item {
        flex-direction: column;
        text-align: center;
    }

    .logo h1 {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .nav ul {
        gap: 15px;
    }

    .hero-content h2 {
        font-size: 22px;
    }

    .btn {
        padding: 10px 22px;
        font-size: 13px;
    }

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

    .hero-buttons .btn {
        width: 100%;
        max-width: 200px;
        text-align: center;
    }

    .products,
    .about,
    .contact {
        padding: 50px 0;
    }

    .product-card {
        padding: 20px;
    }

    .product-icon {
        font-size: 40px;
    }

    .stat-number {
        font-size: 28px;
    }
}

.product-detail {
    background: #fff;
    border-radius: 15px;
    padding: 35px;
    margin-bottom: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #eee;
}

.detail-header {
    display: flex;
    align-items: center;
    gap: 20px;
    padding-bottom: 25px;
    border-bottom: 2px solid #f0f0f0;
    margin-bottom: 30px;
}

.detail-icon {
    font-size: 56px;
}

.detail-title h3 {
    font-size: 24px;
    font-weight: 600;
    color: #16213e;
    margin-bottom: 8px;
}

.detail-title p {
    font-size: 14px;
    color: #666;
}

.detail-text h4 {
    font-size: 16px;
    font-weight: 600;
    color: #16213e;
    margin-bottom: 15px;
    margin-top: 25px;
}

.detail-text h4:first-child {
    margin-top: 0;
}

.detail-text p {
    font-size: 15px;
    color: #555;
    line-height: 1.8;
    margin-bottom: 15px;
}

.detail-text ul {
    list-style: none;
    padding-left: 0;
}

.detail-text li {
    font-size: 15px;
    color: #555;
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    line-height: 1.7;
}

.detail-text li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: #4fc3f7;
    font-weight: bold;
}

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.service-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #e8f4f8 100%);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.service-icon {
    font-size: 42px;
    margin-bottom: 18px;
}

.service-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: #16213e;
    margin-bottom: 12px;
}

.service-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
}

.advantages {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e8f4f8 100%);
}

.advantages-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.advantage-item {
    display: flex;
    gap: 15px;
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.05);
}

.advantage-icon {
    font-size: 24px;
    color: #4fc3f7;
    flex-shrink: 0;
}

.advantage-content h4 {
    font-size: 16px;
    font-weight: 600;
    color: #16213e;
    margin-bottom: 8px;
}

.advantage-content p {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
}

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

    .product-detail {
        padding: 25px;
    }

    .detail-icon {
        font-size: 48px;
    }

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

    .advantages-list {
        grid-template-columns: 1fr;
    }
}