/* ===== CSS Reset & Base ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #0f766e;
    --primary-dark: #0d6560;
    --primary-light: #14b8a6;
    --secondary: #1e40af;
    --secondary-light: #3b82f6;
    --accent: #f59e0b;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --text: #334155;
    --text-light: #64748b;
    --text-lighter: #94a3b8;
    --bg: #ffffff;
    --bg-light: #f8fafc;
    --bg-gray: #f1f5f9;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow: 0 4px 15px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.12);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

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

ul {
    list-style: none;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-color: var(--primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(15, 118, 110, 0.3);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}

.btn-outline-light {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
    padding: 8px 22px;
    font-size: 13px;
}

.btn-outline-light:hover {
    background: var(--primary);
    color: #fff;
}

.btn-primary-nav {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    padding: 8px 22px;
    font-size: 13px;
}

.btn-primary-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(15, 118, 110, 0.3);
}

.btn-lg {
    padding: 14px 34px;
    font-size: 15px;
}

.btn-product {
    color: var(--primary);
    font-weight: 600;
    padding: 0;
    font-size: 14px;
    border-radius: 0;
}

.btn-product:hover {
    gap: 12px;
    color: var(--primary-dark);
}

/* ===== Gradient Text ===== */
.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Section Headers ===== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    background: linear-gradient(135deg, rgba(15, 118, 110, 0.1), rgba(59, 130, 246, 0.1));
    color: var(--primary);
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-header p {
    font-size: 16px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Top Bar ===== */
.top-bar {
    background: var(--dark);
    color: #fff;
    padding: 8px 0;
    font-size: 13px;
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-left {
    display: flex;
    gap: 24px;
}

.top-bar-left span {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-lighter);
}

.top-bar-left span i {
    color: var(--primary-light);
}

.top-bar-right {
    display: flex;
    gap: 16px;
}

.top-bar-right a {
    color: var(--text-lighter);
    font-size: 14px;
}

.top-bar-right a:hover {
    color: var(--primary-light);
}

/* ===== Navbar ===== */
.navbar {
    background: var(--bg);
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid var(--border);
}

.navbar.scrolled {
    box-shadow: var(--shadow);
    padding: 8px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--dark);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary-light));
    color: #fff;
    border-radius: 10px;
    font-size: 18px;
}

.logo-highlight {
    color: var(--primary);
}

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

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
    border-radius: 1px;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}

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

.nav-actions {
    display: flex;
    gap: 10px;
}

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

.mobile-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--dark);
    transition: var(--transition);
    border-radius: 2px;
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, #f0fdfa 0%, #ecfdf5 30%, #eff6ff 70%, #f0f9ff 100%);
    padding: 80px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero-bg-shapes .shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.06;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -200px;
    right: -100px;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--secondary-light);
    bottom: -100px;
    left: -50px;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--accent);
    top: 50%;
    left: 50%;
}

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

.hero-badge {
    display: inline-block;
    background: rgba(15, 118, 110, 0.1);
    color: var(--primary);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 800;
    color: var(--dark);
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 17px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 520px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 36px;
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    display: inline;
}

.stat-suffix {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    display: block;
    font-size: 13px;
    color: var(--text-light);
    margin-top: 2px;
}

/* Hero Illustration */
.hero-illustration {
    position: relative;
    width: 100%;
    height: 450px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-circle {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(15, 118, 110, 0.08), rgba(59, 130, 246, 0.08));
    border: 2px dashed rgba(15, 118, 110, 0.2);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.floating-card {
    position: absolute;
    background: #fff;
    padding: 16px 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 14px;
    color: var(--dark);
    z-index: 2;
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    font-size: 24px;
}

.card-1 {
    top: 30px;
    left: 20px;
    animation-delay: 0s;
}

.card-1 i { color: #0ea5e9; }

.card-2 {
    top: 50px;
    right: 10px;
    animation-delay: 0.5s;
}

.card-2 i { color: #10b981; }

.card-3 {
    bottom: 60px;
    left: 10px;
    animation-delay: 1s;
}

.card-3 i { color: #8b5cf6; }

.card-4 {
    bottom: 40px;
    right: 30px;
    animation-delay: 1.5s;
}

.card-4 i { color: #f59e0b; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* ===== Products Section ===== */
.products-section {
    padding: 100px 0;
    background: var(--bg);
}

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

.tab-btn {
    padding: 10px 24px;
    border: 2px solid var(--border);
    border-radius: 50px;
    background: var(--bg);
    color: var(--text);
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover,
.tab-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary), var(--secondary-light));
    opacity: 0;
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.product-card:hover::before {
    opacity: 1;
}

.product-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 24px;
    margin-bottom: 20px;
}

.product-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 12px;
}

.product-card > p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.7;
}

.product-features {
    margin-bottom: 24px;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text);
    padding: 5px 0;
}

.product-features li i {
    color: var(--primary);
    font-size: 11px;
}

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

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

.feature-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(15, 118, 110, 0.2);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, rgba(15, 118, 110, 0.1), rgba(59, 130, 246, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 22px;
    color: var(--primary);
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: linear-gradient(135deg, var(--primary), var(--secondary-light));
    color: #fff;
}

.feature-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== Industries Section ===== */
.industries-section {
    padding: 100px 0;
    background: var(--bg);
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 24px;
}

.industry-item {
    text-align: center;
    padding: 30px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    background: var(--bg);
    cursor: pointer;
}

.industry-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--primary);
}

.industry-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(15, 118, 110, 0.08), rgba(59, 130, 246, 0.08));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    font-size: 24px;
    color: var(--primary);
    transition: var(--transition);
}

.industry-item:hover .industry-icon {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
}

.industry-item span {
    font-size: 13px;
    font-weight: 600;
    color: var(--dark);
}

/* ===== About Section ===== */
.about-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #f0fdfa 0%, #eff6ff 100%);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content .section-tag {
    margin-bottom: 16px;
}

.about-content h2 {
    font-size: 34px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
    line-height: 1.3;
}

.about-content > p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 32px;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about-feature-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.about-feature-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, rgba(15, 118, 110, 0.1), rgba(59, 130, 246, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--primary);
}

.about-feature-item h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 4px;
}

.about-feature-item p {
    font-size: 13px;
    color: var(--text-light);
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.stat-card {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-card-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(15, 118, 110, 0.1), rgba(59, 130, 246, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    font-size: 20px;
    color: var(--primary);
}

.stat-card h3 {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0;
}

.stat-card .stat-number {
    font-size: inherit;
    font-weight: inherit;
    color: inherit;
}

.stat-card .stat-suffix {
    font-size: inherit;
    font-weight: inherit;
    color: inherit;
}

.stat-card p {
    font-size: 13px;
    color: var(--text-light);
    font-weight: 500;
}

/* ===== FAQ Section ===== */
.faq-section {
    padding: 100px 0;
    background: var(--bg);
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

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

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: rgba(15, 118, 110, 0.3);
}

.faq-item.active {
    border-color: var(--primary);
    box-shadow: 0 4px 15px rgba(15, 118, 110, 0.1);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 18px 24px;
    background: var(--bg);
    border: none;
    font-family: 'Poppins', sans-serif;
    font-size: 14px;
    font-weight: 500;
    color: var(--dark);
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-item.active .faq-question {
    background: rgba(15, 118, 110, 0.05);
    color: var(--primary);
}

.faq-question i {
    font-size: 14px;
    color: var(--text-light);
    transition: var(--transition);
    min-width: 14px;
}

.faq-item.active .faq-question i {
    transform: rotate(45deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 24px 18px;
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.7;
}

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

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 40px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-card {
    background: var(--bg);
    padding: 24px;
    border-radius: var(--radius);
    display: flex;
    align-items: flex-start;
    gap: 16px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.contact-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.contact-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
}

.contact-card h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 6px;
}

.contact-card p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

.contact-form-wrapper {
    background: var(--bg);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.form-group.full-width {
    width: 100%;
}

.form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: 'Poppins', sans-serif;
    font-size: 14px;
    color: var(--text);
    transition: var(--transition);
    background: var(--bg);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.btn-submit {
    align-self: flex-start;
}

/* ===== Footer ===== */
.footer {
    background: var(--dark);
    color: #fff;
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.footer-logo .logo-icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
}

.footer-logo .logo-highlight {
    color: var(--primary-light);
}

.footer-about p {
    font-size: 13px;
    color: var(--text-lighter);
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-lighter);
    font-size: 14px;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary);
    color: #fff;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--primary-light);
    border-radius: 1px;
}

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

.footer-col ul li a {
    font-size: 13px;
    color: var(--text-lighter);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
    color: var(--text-lighter);
}

.footer-contact li i {
    color: var(--primary-light);
    margin-top: 4px;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-lighter);
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border: none;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 4px 15px rgba(15, 118, 110, 0.3);
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(15, 118, 110, 0.4);
}

/* ===== Animations ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-content h1 {
        font-size: 38px;
    }

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

    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .industries-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .top-bar {
        display: none;
    }

    .nav-links,
    .nav-actions {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg);
        padding: 20px;
        gap: 16px;
        border-top: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
    }

    .nav-actions.active {
        display: flex;
        position: absolute;
        top: calc(100% + 220px);
        left: 0;
        right: 0;
        background: var(--bg);
        padding: 0 20px 20px;
        justify-content: center;
        box-shadow: var(--shadow-lg);
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 32px;
    }

    .hero-content p {
        max-width: 100%;
    }

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

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

    .hero-image {
        display: none;
    }

    .section-header h2 {
        font-size: 28px;
    }

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

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

    .industries-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

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

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

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

    .contact-form-wrapper {
        padding: 24px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 26px;
    }

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

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

    .about-stats {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .hero-stats {
        gap: 20px;
    }

    .stat-number, .stat-suffix {
        font-size: 24px;
    }

    .btn-lg {
        padding: 12px 24px;
        font-size: 14px;
    }

    .products-tabs {
        gap: 8px;
    }

    .tab-btn {
        padding: 8px 16px;
        font-size: 13px;
    }
}