/* Custom CSS for Shanghai Hanxincheng Official Website */

/* --- Design Tokens & Variables --- */
:root {
    --bg-dark: #070a13;
    --bg-darker: #04060b;
    --bg-alt: #0b111e;
    --surface: rgba(15, 23, 42, 0.45);
    --surface-border: rgba(255, 255, 255, 0.06);
    --surface-glow: rgba(0, 242, 254, 0.15);
    
    --primary: #00f2fe;
    --primary-rgb: 0, 242, 254;
    --secondary: #4facfe;
    --secondary-rgb: 79, 172, 254;
    --accent: #8a2be2;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --font-heading: 'Outfit', 'Noto Sans SC', sans-serif;
    --font-body: 'Inter', 'Noto Sans SC', sans-serif;
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    
    --navbar-height: 80px;
    --container-width: 1200px;
}

/* --- Resets & Base Styles --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.25;
}

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

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    background: none;
    border: none;
    outline: none;
}

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

/* --- Layout Utilities --- */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 100px 0;
}

.bg-alt {
    background-color: var(--bg-alt);
}

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

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Badge & Buttons --- */
.badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid rgba(0, 242, 254, 0.2);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 24px;
    text-transform: uppercase;
}

.badge-outline {
    background: transparent;
    border-color: var(--text-muted);
    color: var(--text-primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-family: var(--font-heading);
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--bg-darker);
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 242, 254, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--surface-border);
    backdrop-filter: blur(5px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-nav {
    padding: 8px 20px;
    font-size: 0.9rem;
    background: rgba(0, 242, 254, 0.05);
    border: 1px solid rgba(0, 242, 254, 0.3);
    color: var(--primary);
}

.btn-nav:hover {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--bg-darker);
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.2);
}

.btn-block {
    display: flex;
    width: 100%;
}

/* --- Section Header --- */
.section-header {
    margin-bottom: 64px;
}

.section-subtitle {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--secondary);
    letter-spacing: 2px;
    text-transform: uppercase;
    display: block;
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: 2.25rem;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
    color: var(--text-secondary);
}

/* --- Navigation Bar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--navbar-height);
    background: rgba(7, 10, 19, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--surface-border);
    z-index: 1000;
    transition: var(--transition-normal);
}

.navbar.scrolled {
    height: 70px;
    background: rgba(4, 6, 11, 0.85);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: var(--container-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.logo-tech {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary);
    background: rgba(0, 242, 254, 0.1);
    padding: 1px 6px;
    border-radius: 4px;
}

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

.nav-link {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: var(--transition-normal);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    cursor: pointer;
}

.mobile-toggle .bar {
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-normal);
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    padding-top: calc(var(--navbar-height) + 40px);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at 10% 20%, rgba(15, 23, 42, 0.3) 0%, rgba(7, 10, 19, 1) 90%);
}

.hero-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle at 80% 20%, rgba(0, 242, 254, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

.hero-content {
    z-index: 10;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 540px;
}

.hero-btns {
    display: flex;
    gap: 16px;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 10;
}

.visual-card-wrapper {
    position: relative;
    padding: 12px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.01) 100%);
    border-radius: var(--radius-lg);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    border: 1px solid var(--surface-border);
    animation: float 6s ease-in-out infinite;
}

.visual-card {
    position: relative;
    border-radius: calc(var(--radius-lg) - 4px);
    overflow: hidden;
    aspect-ratio: 1;
    width: 100%;
    max-width: 420px;
    box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.6);
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.85) contrast(1.1);
    transition: var(--transition-slow);
}

.visual-card:hover .hero-image {
    transform: scale(1.05);
}

.visual-badge {
    position: absolute;
    bottom: 20px;
    left: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(4, 6, 11, 0.75);
    border: 1px solid var(--surface-border);
    backdrop-filter: blur(8px);
    padding: 8px 16px;
    border-radius: 30px;
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 500;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--primary);
    border-radius: 50%;
    position: relative;
}

.pulse-dot::after {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    width: 16px;
    height: 16px;
    border: 2px solid var(--primary);
    border-radius: 50%;
    animation: pulse 1.8s infinite;
    opacity: 0;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.mouse {
    width: 26px;
    height: 42px;
    border: 2px solid var(--text-muted);
    border-radius: 20px;
    display: block;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background-color: var(--primary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-wheel 1.6s ease-out infinite;
}

/* --- About Us Section --- */
.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 64px;
    align-items: center;
}

.about-info h3 {
    font-size: 1.75rem;
    margin-bottom: 20px;
}

.about-info p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1rem;
}

.about-metrics {
    display: flex;
    gap: 40px;
    margin-top: 40px;
    border-top: 1px solid var(--surface-border);
    padding-top: 32px;
}

.metric-item {
    flex: 1;
}

.metric-num {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.metric-unit {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary);
}

.metric-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.feature-card {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    padding: 24px;
    border-radius: var(--radius-md);
    display: flex;
    gap: 20px;
    align-items: flex-start;
    transition: var(--transition-normal);
}

.feature-card:hover {
    border-color: rgba(0, 242, 254, 0.25);
    box-shadow: 0 10px 30px rgba(0, 242, 254, 0.05);
    transform: translateX(8px);
}

.feature-icon {
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.15);
    color: var(--primary);
    padding: 12px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-content h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.feature-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* --- Services Section --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.service-card {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    padding: 40px;
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 100% 0%, rgba(0, 242, 254, 0.04) 0%, transparent 60%);
    pointer-events: none;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 242, 254, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 30px rgba(0, 242, 254, 0.05);
}

.service-icon-wrapper {
    width: 60px;
    height: 60px;
    background: rgba(0, 242, 254, 0.05);
    border: 1px solid rgba(0, 242, 254, 0.15);
    color: var(--primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
    transition: var(--transition-normal);
}

.service-card:hover .service-icon-wrapper {
    background: var(--primary);
    color: var(--bg-darker);
    box-shadow: 0 0 20px rgba(0, 242, 254, 0.3);
}

.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 16px;
}

.service-card p {
    font-size: 0.95rem;
    margin-bottom: 24px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.service-list {
    list-style: none;
    border-top: 1px solid var(--surface-border);
    padding-top: 20px;
}

.service-list li {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    padding-left: 18px;
    position: relative;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background-color: var(--secondary);
    border-radius: 50%;
}

/* --- Tech Stack Section --- */
.tech-container {
    max-width: 960px;
    margin: 0 auto;
}

.tech-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.tech-tab-btn {
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--surface-border);
    color: var(--text-secondary);
    border-radius: 30px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition-normal);
}

.tech-tab-btn:hover, .tech-tab-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--bg-darker);
    border-color: transparent;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.2);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.tech-item {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    padding: 24px;
    border-radius: var(--radius-md);
    text-align: left;
    transition: var(--transition-normal);
}

.tech-item:hover {
    border-color: rgba(79, 172, 254, 0.3);
    background: rgba(15, 23, 42, 0.6);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.tech-icon-text {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tech-item span {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Hide animations for filtering */
.tech-item.hidden {
    display: none;
}

/* --- Contact Us Section --- */
.contact-wrapper {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 64px;
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
}

.contact-info-panel {
    background: radial-gradient(circle at 0% 100%, rgba(0, 242, 254, 0.08) 0%, transparent 60%), var(--bg-alt);
    padding: 56px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border-right: 1px solid var(--surface-border);
}

.contact-info-panel h2 {
    font-size: 2rem;
    margin: 16px 0 20px;
}

.contact-info-panel p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.detail-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.detail-icon {
    background: rgba(79, 172, 254, 0.1);
    color: var(--secondary);
    padding: 10px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.detail-content h5 {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.detail-content p {
    font-size: 1rem;
    color: var(--text-primary);
    margin: 0;
}

.detail-content p a {
    transition: var(--transition-fast);
}

.detail-content p a:hover {
    color: var(--primary);
}

.contact-form-panel {
    padding: 56px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input, .form-group select, .form-group textarea {
    background: rgba(4, 6, 11, 0.4);
    border: 1px solid var(--surface-border);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.form-group input::placeholder, .form-group textarea::placeholder {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--primary);
    background: rgba(4, 6, 11, 0.6);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.15);
}

.form-group select option {
    background-color: var(--bg-dark);
    color: var(--text-primary);
}

.form-status {
    font-size: 0.9rem;
    text-align: center;
    min-height: 24px;
}

.form-status.success {
    color: #10b981;
}

.form-status.error {
    color: #ef4444;
}

/* --- Footer --- */
.footer {
    background-color: var(--bg-darker);
    border-top: 1px solid var(--surface-border);
    padding: 64px 0 40px;
}

.footer-container {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 48px;
    align-items: flex-start;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--text-muted);
    max-width: 320px;
}

.footer-links h4 {
    font-size: 1rem;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-links a:hover {
    color: var(--primary);
    padding-left: 4px;
}

.footer-legal {
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-legal a:hover {
    color: var(--text-secondary);
}

/* --- Back to Top Button --- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--surface-border);
    color: var(--text-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-normal);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--bg-darker);
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.3);
}

/* --- Keyframes & Animations --- */
@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-12px);
    }
    100% {
        transform: translateY(0px);
    }
}

@keyframes pulse {
    0% {
        transform: scale(0.8);
        opacity: 0.8;
    }
    100% {
        transform: scale(1.8);
        opacity: 0;
    }
}

@keyframes scroll-wheel {
    0% {
        transform: translate(-50%, 0);
        opacity: 1;
    }
    60% {
        transform: translate(-50%, 16px);
        opacity: 0;
    }
    100% {
        transform: translate(-50%, 0);
        opacity: 0;
    }
}

/* --- Responsive Design (Media Queries) --- */
@media (max-width: 1024px) {
    .hero-content h1 {
        font-size: 3rem;
    }
    .about-grid, .hero-container {
        gap: 32px;
    }
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    .contact-info-panel {
        border-right: none;
        border-bottom: 1px solid var(--surface-border);
        padding: 40px;
    }
    .contact-form-panel {
        padding: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --navbar-height: 70px;
    }
    .section-padding {
        padding: 60px 0;
    }
    .navbar {
        background: rgba(7, 10, 19, 0.95);
    }
    .mobile-toggle {
        display: flex;
    }
    .nav-menu {
        position: fixed;
        top: var(--navbar-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--navbar-height));
        background-color: var(--bg-dark);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 48px;
        gap: 32px;
        z-index: 999;
        transition: var(--transition-normal);
        border-top: 1px solid var(--surface-border);
    }
    .nav-menu.active {
        left: 0;
    }
    .nav-actions {
        margin-right: 12px;
    }
    .btn-nav {
        display: none; /* Hide nav button on mobile, toggle is enough */
    }
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-desc {
        margin-left: auto;
        margin-right: auto;
    }
    .hero-btns {
        justify-content: center;
    }
    .visual-card-wrapper {
        max-width: 320px;
        margin: 0 auto;
    }
    .about-grid {
        grid-template-columns: 1fr;
    }
    .about-metrics {
        justify-content: center;
    }
    .services-grid {
        grid-template-columns: 1fr;
    }
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-container {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }
    .footer-brand p {
        margin: 0 auto;
    }
    /* Mobile Menu Toggle Animation */
    .mobile-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .mobile-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    .mobile-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2.25rem;
    }
    .hero-btns {
        flex-direction: column;
        width: 100%;
    }
    .btn {
        width: 100%;
    }
    .tech-grid {
        grid-template-columns: 1fr;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .about-metrics {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}