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

:root {
    --primary-color: #0052CC;
    --primary-hover: #0747A6;
    --secondary-color: #00B8D9;
    --text-color: #172B4D;
    --text-secondary: #5E6C84;
    --bg-light: #F4F5F7;
    --white: #FFFFFF;
    --border-color: #DFE1E6;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
    --radius: 8px;
    --radius-lg: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    height: 72px;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    font-weight: 700;
    font-size: 20px;
    padding: 6px 12px;
    border-radius: var(--radius);
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-menu a {
    font-size: 15px;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-actions {
    display: flex;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
    border: none;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-color);
    transition: all 0.3s;
}

.hero {
    padding: 160px 0 80px;
    background: linear-gradient(180deg, #E8F4FD 0%, var(--white) 100%);
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-color);
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.hero-badge {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 12px;
    color: var(--text-secondary);
}

.hero-image {
    flex: 1;
}

.dashboard-preview {
    width: 100%;
    height: 400px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.stats {
    padding: 60px 0;
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
}

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

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 42px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.features {
    padding: 100px 0;
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

.features-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    font-size: 15px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tab-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
}

.features-content {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: var(--shadow);
}

.feature-panel {
    display: none;
}

.feature-panel.active {
    display: flex;
    gap: 60px;
    align-items: center;
}

.feature-info {
    flex: 1;
}

.feature-info h3 {
    font-size: 28px;
    margin-bottom: 16px;
}

.feature-info > p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.feature-list {
    margin-bottom: 32px;
}

.feature-list li {
    margin-bottom: 20px;
}

.feature-list strong {
    display: block;
    font-size: 16px;
    margin-bottom: 4px;
    color: var(--text-color);
}

.feature-list span {
    font-size: 14px;
    color: var(--text-secondary);
}

.feature-visual {
    flex: 1;
}

.feature-img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.why-us {
    padding: 100px 0;
    background: var(--white);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.advantage-card {
    padding: 32px;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    transition: all 0.3s;
}

.advantage-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.advantage-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.advantage-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.advantage-card > p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.advantage-card ul {
    font-size: 13px;
    color: var(--text-secondary);
}

.advantage-card li {
    margin-bottom: 8px;
    padding-left: 16px;
    position: relative;
}

.advantage-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.customers {
    padding: 80px 0;
    background: var(--bg-light);
}

.customer-logos {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
}

.logo-item {
    width: 120px;
    height: 60px;
    background: var(--white);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    color: var(--text-secondary);
    box-shadow: var(--shadow);
}

.cases {
    padding: 100px 0;
    background: var(--white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.case-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s;
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.case-image {
    height: 180px;
    background: linear-gradient(135deg, #E8F4FD 0%, #D0E8FA 100%);
    background-size: cover;
    background-position: center;
}

.case-content {
    padding: 24px;
}

.case-content h4 {
    font-size: 16px;
    margin-bottom: 8px;
}

.case-content p {
    font-size: 14px;
    color: var(--text-secondary);
}

.cases-cta {
    text-align: center;
}

.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, #0747A6 100%);
}

.cta-content {
    text-align: center;
    color: var(--white);
}

.cta-content h2 {
    font-size: 36px;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 32px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.cta-section .btn-primary {
    background: var(--white);
    color: var(--primary-color);
}

.cta-section .btn-primary:hover {
    background: #f0f0f0;
}

.cta-section .btn-outline {
    border-color: var(--white);
    color: var(--white);
}

.cta-section .btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
}

.about {
    padding: 100px 0;
    background: var(--bg-light);
}

.certifications {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
}

.cert-item {
    padding: 16px 32px;
    background: var(--white);
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-color);
    box-shadow: var(--shadow);
}

.footer {
    background: var(--text-color);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    flex: 0 0 240px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.footer-logo .logo-icon {
    font-size: 16px;
    padding: 4px 8px;
}

.footer-logo .logo-text {
    color: var(--white);
}

.footer-brand p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    flex: 1;
    display: flex;
    gap: 40px;
}

.footer-column h4 {
    font-size: 15px;
    margin-bottom: 16px;
}

.footer-column ul {
    font-size: 14px;
}

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

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.2s;
}

.footer-column a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom a:hover {
    color: var(--white);
}

.footer-bottom p {
    margin-bottom: 8px;
}

@media (max-width: 1024px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-badge {
        align-items: center;
    }

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

    .feature-panel.active {
        flex-direction: column;
    }

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

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

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

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

    .pricing-card.featured {
        transform: none;
    }
}

@media (max-width: 768px) {
    .nav-menu,
    .nav-actions {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        padding: 120px 0 60px;
    }

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

    .hero-subtitle {
        font-size: 16px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .stat-number {
        font-size: 32px;
    }

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

    .features-tabs {
        gap: 8px;
    }

    .tab-btn {
        padding: 10px 16px;
        font-size: 14px;
    }

    .features-content {
        padding: 24px;
    }

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

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

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

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

    .pricing-card.featured {
        transform: none;
    }

    .pricing-card.featured:hover {
        transform: translateY(-4px);
    }

    .cta-content h2 {
        font-size: 28px;
    }

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

    .footer-links {
        flex-wrap: wrap;
        gap: 24px;
    }

    .footer-column {
        flex: 1 1 150px;
    }
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--white);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: var(--radius);
    transition: all 0.2s;
}

.modal-close:hover {
    background: var(--bg-light);
    color: var(--text-color);
}

.modal-body {
    padding: 24px;
}

.modal-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input {
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 14px;
    transition: all 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.1);
}

.form-group input::placeholder {
    color: #A8AFBC;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

.form-actions .btn {
    flex: 1;
}

.solutions {
    padding: 100px 0;
    background: var(--white);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.solution-card {
    padding: 32px;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    transition: all 0.3s;
}

.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.solution-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.solution-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.solution-card > p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.solution-card ul {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.solution-card li {
    margin-bottom: 8px;
    padding-left: 16px;
    position: relative;
}

.solution-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.pricing {
    padding: 100px 0;
    background: var(--bg-light);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: start;
}

.pricing-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    position: relative;
    transition: all 0.3s;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    border: 2px solid var(--primary-color);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-4px);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: var(--white);
    font-size: 12px;
    padding: 4px 16px;
    border-radius: 20px;
}

.pricing-header h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.pricing-header p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.pricing-price {
    margin-bottom: 24px;
}

.pricing-price .price {
    font-size: 42px;
    font-weight: 700;
    color: var(--primary-color);
}

.pricing-price .period {
    font-size: 14px;
    color: var(--text-secondary);
}

.pricing-features {
    text-align: left;
    margin-bottom: 24px;
}

.pricing-features li {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    padding-left: 20px;
    position: relative;
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}