/* ========================================
   博瑞假肢矫形器 - 全局样式
   ======================================== */

/* CSS Variables */
:root {
    --primary: #0066CC;
    --primary-dark: #004D99;
    --primary-light: #E6F0FA;
    --secondary: #00A878;
    --accent: #FF6B35;
    --dark: #1A1A2E;
    --gray-dark: #2D2D44;
    --gray: #6B7280;
    --gray-light: #9CA3AF;
    --gray-lighter: #E5E7EB;
    --gray-bg: #F3F4F6;
    --white: #FFFFFF;
    --bg-dark: #0F172A;
    --text-dark: #111827;
    --text-body: #374151;
    --text-muted: #6B7280;
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-md: 0 6px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 40px rgba(0,0,0,0.15);
    --shadow-xl: 0 25px 50px rgba(0,0,0,0.25);
    
    --radius-sm: 4px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s ease;
    
    --font-display: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

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

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-body);
    background: var(--white);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Header
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

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

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

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

.logo-icon {
    width: 44px;
    height: 44px;
    color: var(--primary);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    letter-spacing: 1px;
}

.logo-sub {
    font-size: 12px;
    color: var(--gray);
    letter-spacing: 2px;
}

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

.nav-link {
    padding: 10px 18px;
    font-size: 15px;
    color: var(--text-dark);
    border-radius: var(--radius);
    transition: var(--transition);
}

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

.nav-btn {
    margin-left: 16px;
    padding: 10px 24px;
    background: var(--primary);
    color: var(--white);
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition);
}

.nav-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    gap: 6px;
    background: var(--gray-bg);
    border-radius: var(--radius);
}

.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    z-index: 999;
    padding: 24px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mobile-nav-link {
    display: block;
    padding: 16px;
    font-size: 16px;
    color: var(--text-dark);
    border-radius: var(--radius);
    transition: var(--transition);
}

.mobile-nav-link:hover {
    background: var(--gray-bg);
}

.mobile-nav-link.admin {
    color: var(--primary);
    font-weight: 600;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-slider {
    position: absolute;
    inset: 0;
}

.hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1s ease;
}

.hero-slide.active {
    opacity: 1;
}

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

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(0, 51, 102, 0.85) 0%,
        rgba(15, 23, 42, 0.75) 50%,
        rgba(0, 168, 120, 0.6) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 24px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: 2px;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    opacity: 0.95;
    margin-bottom: 40px;
    letter-spacing: 3px;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.6);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--white);
    border-radius: 2px;
    animation: scrollBounce 2s infinite;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 102, 204, 0.3);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-3px);
}

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

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

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

.btn-secondary:hover {
    background: var(--gray-bg);
    transform: translateY(-3px);
}

/* ========================================
   Sections
   ======================================== */
.section {
    padding: 100px 0;
}

.section-dark {
    background: var(--bg-dark);
    color: var(--white);
}

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

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}

.section-dark .section-tag {
    background: rgba(0, 102, 204, 0.2);
    color: #60A5FA;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--dark);
    letter-spacing: 1px;
}

.section-dark .section-title {
    color: var(--white);
}

.section-footer {
    text-align: center;
    margin-top: 60px;
}

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

.feature-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-lighter);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    color: var(--primary);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.7;
}

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

.product-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.product-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
}

.product-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 12px;
    background: var(--accent);
    color: var(--white);
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.product-info {
    padding: 24px;
}

.product-category {
    font-size: 12px;
    color: #60A5FA;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.product-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
}

.product-desc {
    font-size: 14px;
    color: var(--gray-light);
    margin-bottom: 16px;
    line-height: 1.6;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #60A5FA;
    font-size: 14px;
    font-weight: 600;
}

.product-link:hover {
    gap: 10px;
}

/* Products Page */
.products-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 160px 0 80px;
    color: var(--white);
    text-align: center;
}

.products-hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.products-hero p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.products-filter {
    padding: 40px 0;
    background: var(--gray-bg);
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray);
    background: var(--white);
    border-radius: var(--radius-full);
    border: 1px solid var(--gray-lighter);
    transition: var(--transition);
}

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

.products-full-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    padding: 60px 0;
}

.product-full-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.product-full-card .product-image {
    height: 200px;
}

.product-full-card .product-info {
    padding: 24px;
}

.product-full-card .product-name {
    color: var(--dark);
}

.product-full-card .product-desc {
    color: var(--gray);
}

.product-full-card .product-category {
    color: var(--primary);
}

.product-full-card .product-link {
    color: var(--primary);
}

/* ========================================
   About Preview
   ======================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
}

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

.about-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--primary);
    color: var(--white);
    padding: 24px 32px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.badge-number {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    line-height: 1;
}

.badge-text {
    font-size: 14px;
    opacity: 0.9;
}

.about-content .section-tag {
    background: var(--primary-light);
    color: var(--primary);
}

.about-content .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.about-content p {
    color: var(--gray);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-list {
    margin: 24px 0 32px;
}

.about-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    color: var(--text-dark);
    font-weight: 500;
}

.about-list svg {
    width: 20px;
    height: 20px;
    color: var(--secondary);
    flex-shrink: 0;
}

/* About Page */
.about-hero {
    background: linear-gradient(135deg, var(--dark) 0%, var(--gray-dark) 100%);
    padding: 160px 0 80px;
    color: var(--white);
}

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

.about-hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.about-hero p {
    font-size: 1.1rem;
    opacity: 0.9;
    line-height: 1.8;
}

.about-hero-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.about-values {
    padding: 100px 0;
}

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

.value-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.value-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.value-icon svg {
    width: 36px;
    height: 36px;
}

.value-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

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

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

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    padding: 0 0 60px;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    padding-right: 60px;
    text-align: right;
}

.timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-left: 60px;
}

.timeline-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    background: var(--primary);
    border-radius: 50%;
    border: 3px solid var(--white);
    box-shadow: var(--shadow);
}

.timeline-item:nth-child(odd) .timeline-dot {
    right: -8px;
    top: 0;
}

.timeline-item:nth-child(even) .timeline-dot {
    left: -8px;
    top: 0;
}

.timeline-year {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary);
    color: var(--white);
    font-size: 14px;
    font-weight: 700;
    border-radius: var(--radius-full);
    margin-bottom: 12px;
}

.timeline-item h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.timeline-item p {
    color: var(--gray);
    line-height: 1.6;
}

/* ========================================
   Stats
   ======================================== */
.stats {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 80px 0;
}

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

.stat-item {
    text-align: center;
    color: var(--white);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
}

.stat-unit {
    font-size: 1.5rem;
    font-weight: 700;
    margin-left: 4px;
}

.stat-label {
    display: block;
    margin-top: 8px;
    font-size: 14px;
    opacity: 0.9;
    letter-spacing: 1px;
}

/* ========================================
   Testimonials
   ======================================== */
.testimonials-slider {
    position: relative;
    overflow: hidden;
}

.testimonials-track {
    display: flex;
    gap: 30px;
    animation: scroll 30s linear infinite;
}

.testimonial-card {
    flex: 0 0 380px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.testimonial-quote {
    width: 32px;
    height: 32px;
    color: var(--primary);
    margin-bottom: 16px;
}

.testimonial-text {
    font-size: 15px;
    line-height: 1.8;
    color: var(--gray-light);
    margin-bottom: 24px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: 18px;
}

.author-name {
    display: block;
    font-weight: 600;
    color: var(--white);
}

.author-location {
    display: block;
    font-size: 13px;
    color: var(--gray-light);
}

/* ========================================
   Contact
   ======================================== */
.contact-section {
    padding: 100px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 20px;
}

.contact-info > p {
    color: var(--gray);
    margin-bottom: 32px;
    line-height: 1.8;
}

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

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

.contact-item-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}

.contact-item-icon svg {
    width: 24px;
    height: 24px;
}

.contact-item h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 4px;
}

.contact-item p {
    color: var(--gray);
    font-size: 14px;
}

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

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 18px;
    font-size: 15px;
    border: 1px solid var(--gray-lighter);
    border-radius: var(--radius);
    background: var(--gray-bg);
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

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

.form-submit {
    width: 100%;
    padding: 16px;
    font-size: 16px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand .logo-name,
.footer-brand .logo-sub {
    color: var(--white);
}

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

.footer-desc {
    color: var(--gray-light);
    font-size: 14px;
    line-height: 1.7;
}

.footer-links h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--gray-light);
    font-size: 14px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-contact h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--white);
}

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

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--gray-light);
    font-size: 14px;
}

.footer-contact svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding: 24px 0;
    font-size: 13px;
    color: var(--gray);
}

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

@keyframes scrollBounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(8px);
    }
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products-grid,
    .products-full-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-grid,
    .contact-grid,
    .about-hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-badge {
        right: 20px;
        bottom: 20px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .timeline::before {
        left: 0;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 40px;
        padding-right: 0;
        text-align: left;
    }
    
    .timeline-item:nth-child(even) {
        margin-left: 0;
    }
    
    .timeline-item .timeline-dot {
        left: -8px !important;
        right: auto !important;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .header-inner {
        height: 70px;
    }
    
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .hero {
        min-height: 600px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid,
    .products-full-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .testimonials-track {
        animation-duration: 20s;
    }
    
    .testimonial-card {
        flex: 0 0 300px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .values-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .about-hero {
        padding: 120px 0 60px;
    }
    
    .about-hero h1 {
        font-size: 2rem;
    }
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center {
    text-align: center;
}

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

.text-primary {
    color: var(--primary);
}

.bg-light {
    background: var(--gray-bg);
}

.mt-4 {
    margin-top: 16px;
}

.mb-4 {
    margin-bottom: 16px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}