/* ============================================
   CSS VARIABLES & RESET
   ============================================ */
:root {
    /* Colors - Industrial/Technical Theme */
    --color-primary: #0A2E4D;
    --color-primary-light: #0F4068;
    --color-primary-dark: #061D33;
    --color-accent: #FF6B35;
    --color-accent-light: #FF8C5A;
    --color-accent-dark: #E85420;
    --color-secondary: #00A8CC;
    --color-secondary-light: #33BCDA;
    --color-text-primary: #1A1A1A;
    --color-text-secondary: #4A4A4A;
    --color-text-light: #757575;
    --color-bg-light: #F8FAFB;
    --color-bg-white: #FFFFFF;
    --color-border: #E0E4E8;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    
    /* Typography */
    --font-display: 'Space Mono', monospace;
    --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Borders */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.2);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--color-text-primary);
    line-height: 1.6;
    background-color: var(--color-bg-white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

.section-badge {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.1) 0%, rgba(255, 107, 53, 0.05) 100%);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(255, 107, 53, 0.2);
    margin-bottom: var(--spacing-md);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.05em;
}

.logo-subtitle {
    font-family: var(--font-display);
    font-size: 0.625rem;
    font-weight: 400;
    color: var(--color-accent);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-normal);
}

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

.nav-link:hover::after {
    width: 100%;
}

.nav-link-cta {
    color: var(--color-accent);
    font-weight: 700;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition-fast);
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
        position: relative;
        z-index: 1001;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
        z-index: 999;
        max-height: calc(100vh - 80px);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-menu li {
        border-bottom: 1px solid #eee;
        padding-bottom: 1rem;
    }

    .nav-menu li:last-child {
        border-bottom: none;
    }

    .nav-link {
        font-size: 1.1rem;
        display: block;
        padding: 0.25rem 0;
    }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(10, 46, 77, 0.95) 0%, 
        rgba(10, 46, 77, 0.85) 50%, 
        rgba(0, 168, 204, 0.7) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: white;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-badge {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.3);
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.title-line {
    display: block;
    animation: slideInLeft 0.8s ease;
    animation-fill-mode: both;
}

.title-line:nth-child(2) {
    animation-delay: 0.2s;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-description {
    font-size: 1.25rem;
    line-height: 1.7;
    max-width: 700px;
    margin-bottom: var(--spacing-lg);
    color: rgba(255, 255, 255, 0.95);
}

.hero-description strong {
    color: var(--color-accent-light);
    font-weight: 700;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    max-width: 700px;
}

.stat-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent-light);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 0.5rem;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.7);
    font-family: var(--font-display);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

/* Hero Mobile Responsive */
@media (max-width: 768px) {
    .hero {
        overflow: visible;
        padding-top: 80px;
        min-height: auto;
        padding-bottom: 100px;
    }

    .hero-content {
        padding: 2rem 0;
    }

    .hero-badge {
        font-size: 0.65rem;
        padding: 0.4rem 0.75rem;
    }

    .hero-title {
        font-size: 2.2rem;
        gap: 0.25rem;
    }

    .hero-description {
        font-size: 1rem;
        max-width: 100%;
    }

    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.75rem;
        max-width: 100%;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }

    .hero-cta {
        flex-direction: column;
        gap: 0.75rem;
    }

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

    .scroll-indicator {
        bottom: 1rem;
    }
}

/* ============================================
   VALUE PROPOSITION
   ============================================ */
.value-prop {
    padding: var(--spacing-xxl) 0;
    background: var(--color-bg-light);
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 1200px) {
    .value-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .value-grid {
        grid-template-columns: 1fr;
    }
}

.value-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border);
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.value-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.value-icon img {
    width: 32px;
    height: 32px;
    filter: brightness(0) invert(1);
}

.value-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.value-card p {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ============================================
   PRODUCT SECTION
   ============================================ */
.product-section {
    padding: var(--spacing-xxl) 0;
}

.product-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.product-image-container {
    position: relative;
}

.product-image {
    width: 100%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
}

.product-badges {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.badge {
    background: var(--color-accent);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-md);
}

.spec-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-bg-light);
    border-radius: var(--border-radius-md);
}

.spec-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.spec-label {
    font-size: 0.875rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.spec-value {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-primary);
}

.tech-highlights {
    margin-bottom: var(--spacing-lg);
}

.tech-highlights h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.feature-list li {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.check-icon {
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--color-success);
}

@media (max-width: 968px) {
    .product-showcase {
        grid-template-columns: 1fr;
    }
    
    .spec-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   FEATURES GRID
   ============================================ */
.features-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-primary);
    color: white;
}

.features-section .section-badge {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--color-accent-light);
}

.features-section .section-title {
    color: white;
}

.features-section .section-description {
    color: rgba(255, 255, 255, 0.8);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.feature-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.5;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

/* ============================================
   APPLICATIONS
   ============================================ */
.applications-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-bg-light);
}

.applications-grid {
    display: grid;
    gap: var(--spacing-xl);
}

.app-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

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

.app-card:nth-child(even) {
    direction: rtl;
}

.app-card:nth-child(even) .app-content {
    direction: ltr;
}

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

.app-content {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.app-content h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.app-content p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.app-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.app-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.app-features li::before {
    content: '→';
    color: var(--color-accent);
    font-weight: 700;
}

@media (max-width: 968px) {
    .app-card {
        grid-template-columns: 1fr;
        direction: ltr !important;
    }
}

/* ============================================
   COMPARISON TABLE
   ============================================ */
.comparison-section {
    padding: var(--spacing-xxl) 0;
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-bottom: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

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

.comparison-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-family: var(--font-display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
}

.comparison-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

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

.highlight-column {
    background: rgba(255, 107, 53, 0.05);
    font-weight: 600;
}

.price-highlight {
    color: var(--color-success);
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 700;
}

.delivery-highlight {
    color: var(--color-secondary);
    font-weight: 700;
}

.checkmark {
    color: var(--color-success);
    font-size: 1.25rem;
}

.comparison-cta {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--color-bg-light);
    border-radius: var(--border-radius-lg);
}

.comparison-cta p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-bg-light);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.about-stat {
    text-align: center;
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
}

.about-stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
}

.about-stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: 0.5rem;
}

.certifications {
    margin-top: var(--spacing-lg);
}

.certifications h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.cert-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.cert-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.cert-list li::before {
    content: '✓';
    color: var(--color-success);
    font-weight: 700;
    font-size: 1.125rem;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
}

.about-image-caption {
    margin-top: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--color-text-light);
    text-align: center;
    font-style: italic;
}

@media (max-width: 968px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .cert-list {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-section {
    padding: var(--spacing-xxl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
}

.contact-details {
    margin: var(--spacing-lg) 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
}

.contact-icon {
    flex-shrink: 0;
    color: var(--color-accent);
}

.contact-label {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
    margin-bottom: 0.25rem;
}

.contact-value {
    color: var(--color-text-primary);
    line-height: 1.6;
}

.special-offer {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin-top: var(--spacing-lg);
}

.special-offer h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.special-offer p {
    line-height: 1.7;
}

.contact-form-container {
    background: var(--color-bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

.checkbox-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.form-note {
    font-size: 0.875rem;
    color: var(--color-text-light);
    text-align: center;
    margin-top: var(--spacing-sm);
}

@media (max-width: 968px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .checkbox-group {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    margin-bottom: var(--spacing-md);
}

.footer-logo .logo-text {
    color: white;
}

.footer-description {
    line-height: 1.7;
    max-width: 400px;
}

.footer-col h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent-light);
    padding-left: 0.5rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.875rem;
}

.footer-legal {
    display: flex;
    gap: var(--spacing-md);
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-fast);
}

.footer-legal a:hover {
    color: var(--color-accent-light);
}

@media (max-width: 968px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 568px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   ANIMATIONS & EFFECTS
   ============================================ */
[data-aos] {
    opacity: 1; /* 改为默认可见 */
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(0); /* 改为默认位置 */
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

/* Loading animation for images */
img {
    transition: opacity 0.3s ease;
}

img[loading="lazy"] {
    opacity: 1; /* 改为默认可见 */
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* ============================================
   MOBILE RESPONSIVE PATCH (<=480px)
   ============================================ */
@media (max-width: 480px) {
    /* 全局容器 */
    .container {
        padding: 0 1rem;
    }

    /* 各板块间距缩小 */
    .value-prop,
    .product-section,
    .features-section,
    .applications-section,
    .comparison-section,
    .about-section,
    .contact-section {
        padding-top: 3rem;
        padding-bottom: 3rem;
    }

    /* Section标题 */
    .section-title {
        font-size: 1.75rem;
    }

    .section-description {
        font-size: 0.95rem;
    }

    /* Value卡片 */
    .value-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 0.75rem;
    }

    .value-card {
        padding: 1.25rem;
    }

    .value-card h3 {
        font-size: 1rem;
    }

    .value-card p {
        font-size: 0.85rem;
    }

    .value-icon {
        width: 48px;
        height: 48px;
    }

    .value-icon img {
        width: 24px;
        height: 24px;
    }

    /* Product板块 */
    .product-showcase {
        grid-template-columns: 1fr;
    }

    .spec-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
        padding: 1rem;
    }

    .spec-value {
        font-size: 1rem;
    }

    /* Features板块 */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .feature-card {
        padding: 1.25rem;
    }

    /* Applications板块 */
    .applications-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* 对比表格 */
    .comparison-table th,
    .comparison-table td {
        padding: 0.6rem 0.5rem;
        font-size: 0.8rem;
    }

    .price-highlight {
        font-size: 0.95rem;
    }

    /* About板块 */
    .about-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .about-stat-number {
        font-size: 2rem;
    }

    /* Contact板块 */
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        text-align: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }

    .footer-legal {
        gap: 1rem;
    }

    /* 按钮 */
    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.8rem;
    }
}