/* Product Page Styles - Modern & SEO Optimized */
:root {
    --primary: #1e40af;
    --primary-dark: #1e3a8a;
    --primary-light: #3b82f6;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --text: #1f2937;
    --text-light: #6b7280;
    --text-muted: #9ca3af;
    --bg: #ffffff;
    --bg-light: #f8fafc;
    --bg-warm: #fff7ed;
    --bg-cool: #eff6ff;
    --border: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
a { text-decoration: none; color: inherit; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 30px;
}

/* Header Navigation */
.header {
    background-color: #fff;
    border-bottom: 1px solid #eaeaea;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    position: relative;
    z-index: 100;
}

.logo img {
    height: 45px;
    width: auto;
    display: block;
}

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

.nav-list a {
    font-size: 14px;
    font-weight: 500;
    color: #2c3e50;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

.nav-list a:hover {
    color: #c9a227;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    position: relative;
    z-index: 1001;
}

.hamburger-line {
    width: 100%;
    height: 3px;
    background-color: #2c3e50;
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    z-index: 999;
    height: auto;
    overflow: hidden;
    transition: height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
    height: 0;
}

.mobile-menu.active {
    height: auto;
    opacity: 1;
}

.mobile-nav-list {
    list-style: none;
    padding: 20px 30px;
}

.mobile-nav-list li {
    border-bottom: 1px solid #eaeaea;
}

.mobile-nav-list a {
    display: block;
    padding: 18px 0;
    font-size: 16px;
    font-weight: 500;
    color: #2c3e50;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s ease, padding-left 0.3s ease;
}

.mobile-nav-list a:hover {
    color: #c9a227;
}

/* Hero Banner */
.hero-banner {
    position: relative;
    height: 100vh;
    max-height: 800px;
    min-height: 500px;
    overflow: hidden;
}

.banner-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.banner-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.desktop-banner {
    display: block;
}

.mobile-banner {
    display: none;
}

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(30, 64, 175, 0.3);
    display: flex;
    align-items: center;
}

.banner-content {
    max-width: 700px;
    color: white;
    padding-top: 80px;
}

.banner-tag {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 8px 20px;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 24px;
}

.banner-content h1 {
    font-family: '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.banner-subtitle {
    font-size: 20px;
    line-height: 1.6;
    opacity: 0.9;
    margin-bottom: 40px;
}

.banner-cta {
    display: flex;
    gap: 16px;
}

.btn-primary {
    display: inline-block;
    background: var(--accent);
    color: white;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(245, 158, 11, 0.3);
}

.btn-secondary {
    display: inline-block;
    background: transparent;
    color: white;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    transition: all 0.3s;
}

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

/* Section Common Styles */
.section-tag {
    display: inline-block;
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

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

.section-header h2 {
    font-family: '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    font-size: 42px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
}

.section-header p {
    font-size: 18px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.section-header.light h2,
.section-header.light p {
    color: white;
}

/* Introduction Section */
.intro-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.intro-content h2 {
    font-family: '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 24px;
}

.intro-content p {
    font-size: 17px;
    color: var(--text-light);
    margin-bottom: 20px;
}

.intro-stats {
    display: flex;
    gap: 40px;
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

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

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

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

.intro-image {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.intro-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Specifications Table Section */
.specs-table-section {
    padding: 100px 0;
    background: white;
}

.table-wrapper {
    overflow-x: auto;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.specs-table thead {
    background: var(--primary);
    color: white;
}

.specs-table th {
    padding: 16px;
    text-align: left;
    font-weight: 600;
    white-space: nowrap;
}

.specs-table td {
    padding: 16px;
    border-bottom: 1px solid var(--border);
}

.specs-table tbody tr:hover {
    background: var(--bg-light);
}

.specs-table tbody tr.highlight-row {
    background: linear-gradient(90deg, rgba(30, 64, 175, 0.05) 0%, transparent 100%);
}

.specs-table tbody tr.hot-sale {
    background: linear-gradient(90deg, rgba(245, 158, 11, 0.08) 0%, transparent 100%);
}

.badge {
    display: inline-block;
    background: var(--accent);
    color: white;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    margin-left: 8px;
}

/* Models Section */
.models-section {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-cool) 0%, white 100%);
}

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

.model-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    position: relative;
}

.model-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--primary);
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    z-index: 10;
}

.card-badge.hot {
    background: var(--accent);
}

.card-image {
    height: 200px;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.model-card:hover .card-image img {
    transform: scale(1.05);
}

.card-content {
    padding: 24px;
}

.card-content h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

.card-subtitle {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 20px;
}

.card-specs {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
}

.spec-label {
    color: var(--text-light);
}

.spec-value {
    font-weight: 600;
    color: var(--text);
}

.card-link {
    display: block;
    text-align: center;
    padding: 12px;
    background: var(--bg-light);
    color: var(--primary);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s;
}

.card-link:hover {
    background: var(--primary);
    color: white;
}

/* Applications Section */
.applications-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.app-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    padding: 32px;
    color: white;
    transition: all 0.3s;
}

.app-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

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

.app-card h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.app-card p {
    font-size: 15px;
    opacity: 0.9;
    line-height: 1.6;
}

/* Advantages Section */
.advantages-section {
    padding: 100px 0;
    background: var(--bg-warm);
}

.advantages-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.advantages-image {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.advantages-image img {
    width: 100%;
    height: auto;
    display: block;
}

.advantages-content h2 {
    font-family: '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 40px;
}

.advantage-list {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.advantage-item {
    display: flex;
    gap: 20px;
}

.advantage-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    min-width: 50px;
}

.advantage-text h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.advantage-text p {
    font-size: 15px;
    color: var(--text-light);
}

/* Projects Section */
.projects-section {
    padding: 100px 0;
    background: white;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.project-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

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

.project-image {
    height: 200px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-content {
    padding: 24px;
}

.project-location {
    display: block;
    font-size: 13px;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 8px;
}

.project-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.project-content p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 16px;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-tags span {
    background: var(--bg-light);
    color: var(--text-light);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

/* CTA Section */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 50%, #90caf9 100%);
}

.cta-content {
    text-align: center;
    color: #1f2937;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    font-family: '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
}

.cta-content > p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 40px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
}

.cta-contact {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.cta-contact p {
    font-size: 16px;
}

.cta-contact a {
    color: var(--accent-light);
    text-decoration: none;
    font-weight: 600;
}

/* Footer */
.footer {
    padding: 60px 0 30px;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 50%, #90caf9 100%);
    color: #1f2937;
}

.footer-content {
    text-align: center;
}

.footer-content p {
    font-size: 14px;
    color: #1f2937;
    margin-bottom: 8px;
}

.footer-content p:last-child {
    margin-bottom: 0;
    opacity: 0.7;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .intro-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .intro-image,
    .advantages-image {
        order: -1;
    }

    .banner-content h1 {
        font-size: 44px;
    }

    .section-header h2,
    .cta-content h2,
    .intro-content h2,
    .advantages-content h2 {
        font-size: 32px;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: row;
        height: 70px;
        padding: 0 20px;
    }

    .logo {
        margin-bottom: 0;
    }

    .nav {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .mobile-menu {
        display: block;
        top: 70px;
    }

    .hero-banner {
        min-height: 600px;
    }

    .desktop-banner {
        display: none;
    }

    .mobile-banner {
        display: block;
    }

    .banner-content h1 {
        font-size: 36px;
    }

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

    .banner-cta {
        flex-direction: column;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
    }

    .intro-stats {
        flex-direction: column;
        gap: 24px;
    }

    .specs-table {
        font-size: 12px;
    }

    .specs-table th,
    .specs-table td {
        padding: 12px 8px;
    }

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

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

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

    .advantage-item {
        flex-direction: column;
        gap: 12px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .section-header h2,
    .cta-content h2,
    .intro-content h2,
    .advantages-content h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 20px;
    }

    .banner-content h1 {
        font-size: 28px;
    }

    .intro-section,
    .specs-table-section,
    .models-section,
    .applications-section,
    .advantages-section,
    .projects-section,
    .cta-section {
        padding: 60px 0;
    }
}