/* ========================================
   Global Styles & CSS Variables
   ======================================== */
:root {
    /* Brand Colors - Ánh Dương */
    --primary-yellow: #FFB800;
    --primary-blue: #0066CC;
    --dark-blue: #004080;
    --light-yellow: #FFD966;
    --accent-orange: #FF8C00;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --light-gray: #F5F5F5;
    --gray: #E0E0E0;
    --dark-gray: #666666;
    --text-dark: #1A1A1A;
    --text-light: #4A4A4A;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    --gradient-yellow: linear-gradient(135deg, var(--primary-yellow) 0%, var(--accent-orange) 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(0, 102, 204, 0.9) 0%, rgba(0, 64, 128, 0.95) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-yellow: 0 4px 16px rgba(255, 184, 0, 0.3);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-round: 50%;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========================================
   Reset & Base Styles
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

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

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

ul {
    list-style: none;
}

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

/* ========================================
   Container & Layout
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   Typography
   ======================================== */
.section-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-dark);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--gradient-yellow);
    margin: var(--spacing-sm) auto 0;
    border-radius: var(--radius-sm);
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-yellow);
    color: var(--text-dark);
    box-shadow: var(--shadow-yellow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 184, 0, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

.btn-order {
    background: var(--gradient-yellow);
    color: var(--text-dark);
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-semibold);
    font-size: 0.9375rem;
    white-space: nowrap;
}

.btn-order:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-yellow);
}

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

/* ========================================
   Header & Navigation
   ======================================== */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

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

.navbar {
    padding: var(--spacing-sm) 0;
    background: var(--white);
    border-bottom: 1px solid rgba(0, 102, 204, 0.1);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    min-height: 85px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 8px 0;
    min-width: 180px;
}

.logo img {
    display: block;
    height: 75px;
    width: auto;
    max-width: 280px;
    min-width: 180px;
    flex-shrink: 0;
    object-fit: contain;
    object-position: center;
    border-radius: var(--radius-sm);
    background: transparent;
    padding: 0;
    box-shadow: 0 3px 12px rgba(0, 102, 204, 0.15);
    transition: all var(--transition-normal);
    filter: brightness(1.05) contrast(1.1);
}

.logo:hover img {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 5px 20px rgba(0, 102, 204, 0.25);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: nowrap;
    flex: 1;
    justify-content: flex-end;
    max-width: calc(100% - 200px);
}

.nav-menu li {
    flex-shrink: 0;
}

.nav-link {
    font-weight: var(--font-weight-medium);
    color: var(--text-dark);
    position: relative;
    padding: var(--spacing-xs);
    white-space: nowrap;
    font-size: 0.9375rem;
}

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

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

.nav-link.active {
    color: var(--primary-blue);
    font-weight: var(--font-weight-semibold);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 28px;
    height: 3px;
    background: var(--primary-blue);
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

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

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('https://images.unsplash.com/photo-1565728744382-61accd4aa148?w=1600') center/cover no-repeat;
    padding: var(--spacing-xl) 0;
    margin-top: 70px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-overlay);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--white);
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: var(--font-weight-extrabold);
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.75rem;
    font-weight: var(--font-weight-semibold);
    color: var(--primary-yellow);
    margin-bottom: var(--spacing-md);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-description {
    font-size: 1.25rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
    margin-top: var(--spacing-xl);
}

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

.stat-number {
    font-size: 3rem;
    font-weight: var(--font-weight-extrabold);
    color: var(--primary-yellow);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* ========================================
   Featured Brands Section
   ======================================== */
.featured-brands {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 50%, #f8f9fa 100%);
    overflow: hidden;
    position: relative;
}

.featured-brands::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 102, 204, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255, 184, 0, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.brands-header {
    position: relative;
    z-index: 1;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.featured-brands .section-title {
    position: relative;
    display: inline-block;
    margin-bottom: var(--spacing-sm);
}

.featured-brands .section-title::after {
    content: '';
    display: block;
    width: 100px;
    height: 4px;
    background: var(--gradient-yellow);
    margin: var(--spacing-sm) auto 0;
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 8px rgba(255, 184, 0, 0.3);
}

.featured-brands .section-subtitle {
    position: relative;
    font-size: 1.125rem;
    color: var(--text-light);
    font-weight: var(--font-weight-medium);
    max-width: 700px;
    margin: 0 auto;
}

.brands-carousel-wrapper {
    margin-top: var(--spacing-xl);
    position: relative;
    overflow: hidden;
    padding: var(--spacing-lg) 0;
    mask-image: linear-gradient(
        to right,
        transparent,
        black 8%,
        black 92%,
        transparent
    );
    -webkit-mask-image: linear-gradient(
        to right,
        transparent,
        black 8%,
        black 92%,
        transparent
    );
}

.brands-carousel {
    display: flex;
    gap: var(--spacing-md);
    animation: scroll 30s linear infinite;
    width: fit-content;
    will-change: transform;
}

.brands-carousel:hover {
    animation-play-state: paused;
}

.brand-slide {
    flex-shrink: 0;
    width: 220px;
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 var(--spacing-xs);
}

.brand-logo {
    background: var(--white);
    width: 100%;
    height: 100%;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    box-shadow: 
        0 4px 20px rgba(0, 0, 0, 0.08),
        0 2px 8px rgba(0, 102, 204, 0.1);
    transition: all var(--transition-normal);
    border: 2px solid rgba(0, 102, 204, 0.1);
    overflow: hidden;
    position: relative;
}

.brand-logo::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 184, 0, 0.02) 0%, rgba(0, 102, 204, 0.02) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.brand-logo:hover::before {
    opacity: 1;
}

.brand-logo:hover {
    transform: translateY(-8px) scale(1.03);
    box-shadow: 
        0 8px 30px rgba(0, 102, 204, 0.15),
        0 4px 12px rgba(255, 184, 0, 0.2);
    border-color: var(--primary-yellow);
}

.brand-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    transition: all var(--transition-normal);
    filter: grayscale(15%) brightness(0.98) contrast(1.05);
    position: relative;
    z-index: 1;
}

.brand-logo:hover img {
    filter: grayscale(0%) brightness(1.05) contrast(1.1);
    transform: scale(1.08);
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(calc(-220px * 4 - var(--spacing-md) * 4));
    }
}

/* Gradient overlay for smooth fade effect */
.brands-carousel-wrapper::before,
.brands-carousel-wrapper::after {
    content: '';
    position: absolute;
    top: 0;
    width: 200px;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.brands-carousel-wrapper::before {
    left: 0;
    background: linear-gradient(to right, 
        linear-gradient(135deg, #f8f9fa 0%, #e9ecef 50%, #f8f9fa 100%),
        transparent
    );
    background: linear-gradient(to right, 
        #f8f9fa 0%,
        rgba(248, 249, 250, 0.8) 30%,
        transparent 100%
    );
}

.brands-carousel-wrapper::after {
    right: 0;
    background: linear-gradient(to left, 
        #f8f9fa 0%,
        rgba(248, 249, 250, 0.8) 30%,
        transparent 100%
    );
}

/* ========================================
   Why Choose Us Section - Timeline Flow
   ======================================== */
.why-choose {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 50%, #f8f9fa 100%);
    position: relative;
    overflow: hidden;
}

.why-choose::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 102, 204, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255, 184, 0, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.timeline-flow {
    position: relative;
    max-width: 1200px;
    margin: var(--spacing-xl) auto 0;
    padding: var(--spacing-xl) 0;
}

/* Flow Line Background */
.flow-line-bg {
    position: absolute;
    top: 50%;
    left: 10%;
    right: 10%;
    height: 4px;
    background: linear-gradient(90deg, #E0E0E0 0%, #D0D0D0 50%, #E0E0E0 100%);
    border-radius: 2px;
    transform: translateY(-50%);
    z-index: 1;
}

.flow-line-active {
    position: absolute;
    top: 50%;
    left: 10%;
    width: 0;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--primary-blue) 0%, 
        var(--primary-yellow) 25%, 
        var(--primary-blue) 50%,
        var(--primary-yellow) 75%,
        var(--primary-blue) 100%);
    background-size: 200% 100%;
    border-radius: 2px;
    transform: translateY(-50%);
    z-index: 2;
    transition: width 0.8s ease;
    animation: flowGradient 3s linear infinite;
    box-shadow: 0 0 10px rgba(0, 102, 204, 0.5);
}

.timeline-flow:hover .flow-line-active {
    width: 100%;
}

.timeline-step[data-step="1"]:hover ~ .flow-line-active {
    width: 0%;
}

.timeline-steps:hover .timeline-step[data-step="2"]:hover ~ .flow-line-active,
.timeline-flow:has(.timeline-step[data-step="2"]:hover) .flow-line-active {
    width: 33.33%;
}

.timeline-steps:hover .timeline-step[data-step="3"]:hover ~ .flow-line-active,
.timeline-flow:has(.timeline-step[data-step="3"]:hover) .flow-line-active {
    width: 66.66%;
}

.timeline-steps:hover .timeline-step[data-step="4"]:hover ~ .flow-line-active,
.timeline-flow:has(.timeline-step[data-step="4"]:hover) .flow-line-active {
    width: 100%;
}

@keyframes flowGradient {
    0% {
        background-position: 0% 50%;
    }
    100% {
        background-position: 200% 50%;
    }
}

.timeline-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    position: relative;
    z-index: 3;
}

/* Timeline Step */
.timeline-step {
    position: relative;
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.timeline-step:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
}

.timeline-step:hover .step-icon {
    transform: scale(1.15);
    box-shadow: 0 8px 25px rgba(0, 102, 204, 0.4);
}

.timeline-step:hover .step-number {
    color: var(--primary-blue);
    transform: scale(1.1);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--white);
    border: 3px solid var(--primary-blue);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: 0.875rem;
    color: var(--primary-blue);
    transition: all var(--transition-normal);
    z-index: 4;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.step-icon {
    width: 80px;
    height: 80px;
    margin: var(--spacing-md) auto;
    background: var(--gradient-primary);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--white);
    transition: all var(--transition-normal);
    position: relative;
    z-index: 2;
}

.step-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-round);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.timeline-step:hover .step-icon::before {
    width: 100%;
    height: 100%;
}

.step-icon i {
    position: relative;
    z-index: 1;
    transition: all var(--transition-normal);
}

.timeline-step:hover .step-icon i {
    transform: scale(1.2);
    filter: drop-shadow(0 0 10px rgba(255, 184, 0, 0.8));
}

.step-content {
    margin-top: var(--spacing-md);
}

.step-content h3 {
    font-size: 1.375rem;
    font-weight: var(--font-weight-bold);
    color: var(--dark-blue);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-normal);
}

.timeline-step:hover .step-content h3 {
    color: var(--primary-blue);
}

.step-content p {
    font-size: 0.9375rem;
    color: var(--text-light);
    line-height: 1.7;
    transition: color var(--transition-normal);
}

.timeline-step:hover .step-content p {
    color: var(--text-dark);
}


.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-primary);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-round);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.feature-card:hover .feature-icon::before {
    width: 100%;
    height: 100%;
}

.feature-icon i {
    position: relative;
    z-index: 1;
    transition: all var(--transition-normal);
}

/* Icon Industry - Rotate and Scale */
.feature-card:hover .icon-industry {
    transform: rotate(360deg) scale(1.1);
    box-shadow: 0 8px 25px rgba(0, 102, 204, 0.4);
}

.feature-card:hover .icon-industry i {
    transform: scale(1.2);
}

/* Icon Palette - Bounce and Rotate */
.feature-card:hover .icon-palette {
    animation: paletteBounce 0.6s ease-in-out;
    box-shadow: 0 8px 25px rgba(255, 184, 0, 0.4);
}

@keyframes paletteBounce {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-10px) rotate(-10deg);
    }
    50% {
        transform: translateY(-15px) rotate(10deg);
    }
    75% {
        transform: translateY(-5px) rotate(-5deg);
    }
}

.feature-card:hover .icon-palette i {
    animation: paletteColorShift 1s ease-in-out infinite;
}

@keyframes paletteColorShift {
    0%, 100% {
        transform: scale(1.1) rotate(0deg);
    }
    50% {
        transform: scale(1.2) rotate(180deg);
    }
}

/* Icon Truck - Move Forward with Smoke */
.feature-card:hover .icon-truck {
    animation: truckMoveForward 1s ease-in-out infinite;
    box-shadow: 0 8px 25px rgba(0, 200, 83, 0.4);
    position: relative;
    overflow: visible;
    z-index: 2;
}

@keyframes truckMoveForward {
    0% {
        transform: translateX(0);
    }
    50% {
        transform: translateX(15px);
    }
    100% {
        transform: translateX(0);
    }
}

.feature-card:hover .icon-truck i {
    transform: scale(1.15);
}

/* Smoke Effect */
.feature-card:hover .icon-truck::after {
    content: '';
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    background: radial-gradient(circle, rgba(200, 200, 200, 0.6) 0%, rgba(150, 150, 150, 0.4) 30%, transparent 70%);
    border-radius: 50%;
    animation: smokePuff 1s ease-out infinite;
    opacity: 0;
}

.feature-card:hover .icon-truck::before {
    content: '';
    position: absolute;
    right: -15px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    background: radial-gradient(circle, rgba(180, 180, 180, 0.5) 0%, rgba(120, 120, 120, 0.3) 40%, transparent 70%);
    border-radius: 50%;
    animation: smokePuff 1s ease-out 0.3s infinite;
    opacity: 0;
}

@keyframes smokePuff {
    0% {
        opacity: 0;
        transform: translateY(-50%) translateX(0) scale(0.5);
    }
    30% {
        opacity: 0.8;
        transform: translateY(-50%) translateX(-5px) scale(1);
    }
    60% {
        opacity: 0.5;
        transform: translateY(-50%) translateX(-10px) scale(1.2);
    }
    100% {
        opacity: 0;
        transform: translateY(-50%) translateX(-20px) scale(1.5);
    }
}

/* Icon Boxes - Scale and Pulse */
.feature-card:hover .icon-boxes {
    animation: boxesPulse 0.6s ease-in-out;
    box-shadow: 0 8px 25px rgba(255, 140, 0, 0.4);
}

@keyframes boxesPulse {
    0%, 100% {
        transform: scale(1);
    }
    25% {
        transform: scale(1.15) rotate(-5deg);
    }
    50% {
        transform: scale(1.2) rotate(5deg);
    }
    75% {
        transform: scale(1.1) rotate(-3deg);
    }
}

.feature-card:hover .icon-boxes i {
    animation: boxesStack 0.8s ease-in-out infinite;
}

@keyframes boxesStack {
    0%, 100% {
        transform: translateY(0) scale(1.1);
    }
    50% {
        transform: translateY(-8px) scale(1.2);
    }
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--dark-blue);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-normal);
}

.feature-card:hover h3 {
    color: var(--primary-blue);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.7;
    transition: color var(--transition-normal);
}

.feature-card:hover p {
    color: var(--text-dark);
}

/* ========================================
   About Section - Về Chúng Tôi
   ======================================== */
.vechungtoi {
    padding: 80px 0;
    background: #f5f7fa;
    font-family: "Inter", sans-serif;
    position: relative;
}

.vct-container {
    max-width: 1250px;
    margin: auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: flex-start;
}

.vct-content-wrapper {
    width: 100%;
    position: relative;
    padding: var(--spacing-xl);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    overflow: visible;
    border: 3px solid transparent;
}

/* Images Wrapper */
.vct-images-wrapper {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 100px;
}

.vct-image-frame {
    position: relative;
    width: 100%;
    border-radius: 20px;
    overflow: visible;
    border: 4px solid transparent;
}

/* Animated Border for Image Frames */
.vct-image-frame::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 20px;
    padding: 4px;
    background: linear-gradient(
        45deg,
        rgba(0, 102, 204, 0.4) 0%,
        rgba(0, 102, 204, 0.7) 25%,
        rgba(0, 102, 204, 1) 50%,
        rgba(0, 102, 204, 0.7) 75%,
        rgba(0, 102, 204, 0.4) 100%
    );
    background-size: 400% 400%;
    -webkit-mask: 
        linear-gradient(#fff 0 0) content-box, 
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: borderGlow 3s ease-in-out infinite;
    z-index: 1;
    opacity: 0.7;
    filter: blur(1px);
}

.vct-image-frame::after {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 20px;
    padding: 2px;
    background: linear-gradient(
        135deg,
        rgba(0, 102, 204, 0.3) 0%,
        rgba(0, 102, 204, 0.6) 50%,
        rgba(0, 102, 204, 0.3) 100%
    );
    background-size: 200% 200%;
    -webkit-mask: 
        linear-gradient(#fff 0 0) content-box, 
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: borderGlowReverse 4s ease-in-out infinite;
    z-index: 0;
    opacity: 0.5;
    filter: blur(2px);
}

.image-frame-inner {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 75%;
    border-radius: 16px;
    overflow: hidden;
    background: var(--white);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    z-index: 2;
}

.vct-image-frame img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
    display: block;
}

.vct-image-frame:hover img {
    transform: scale(1.08);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.85) 0%, rgba(0, 64, 128, 0.9) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 3;
    border-radius: 16px;
}

.vct-image-frame:hover .image-overlay {
    opacity: 1;
}

.image-overlay i {
    font-size: 3.5rem;
    color: var(--primary-yellow);
    animation: iconFloat 2s ease-in-out infinite;
}

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

/* Animated Border Effect */
.vct-content-wrapper::before {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: var(--radius-lg);
    padding: 3px;
    background: linear-gradient(
        45deg,
        rgba(0, 102, 204, 0.4) 0%,
        rgba(0, 102, 204, 0.7) 25%,
        rgba(0, 102, 204, 1) 50%,
        rgba(0, 102, 204, 0.7) 75%,
        rgba(0, 102, 204, 0.4) 100%
    );
    background-size: 400% 400%;
    -webkit-mask: 
        linear-gradient(#fff 0 0) content-box, 
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: borderGlow 3s ease-in-out infinite;
    z-index: 0;
    opacity: 0.7;
    filter: blur(1px);
}

.vct-content-wrapper::after {
    content: '';
    position: absolute;
    inset: -5px;
    border-radius: var(--radius-lg);
    padding: 2px;
    background: linear-gradient(
        135deg,
        rgba(0, 102, 204, 0.3) 0%,
        rgba(0, 102, 204, 0.6) 50%,
        rgba(0, 102, 204, 0.3) 100%
    );
    background-size: 200% 200%;
    -webkit-mask: 
        linear-gradient(#fff 0 0) content-box, 
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: borderGlowReverse 4s ease-in-out infinite;
    z-index: -1;
    opacity: 0.5;
    filter: blur(2px);
}

@keyframes borderGlow {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

@keyframes borderGlowReverse {
    0% {
        background-position: 100% 50%;
    }
    50% {
        background-position: 0% 50%;
    }
    100% {
        background-position: 100% 50%;
    }
}

.vct-content-wrapper > * {
    position: relative;
    z-index: 1;
}

.vct-content-wrapper h2 {
    font-size: 42px;
    font-weight: 700;
    color: #003d99;
    margin-bottom: 10px;
}

.vct-content-wrapper h3 {
    font-size: 22px;
    font-weight: 600;
    color: #005bbb;
    margin-bottom: 20px;
}

.vct-content-wrapper p {
    line-height: 1.6;
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 25px;
}

.vct-card {
    background: white;
    padding: 18px 22px;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    border: 2px solid transparent;
    margin-bottom: 18px;
    transition: 0.3s;
    position: relative;
    overflow: visible;
}

/* Animated Border for Cards */
.vct-card::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 16px;
    padding: 2px;
    background: linear-gradient(
        45deg,
        rgba(0, 102, 204, 0.4) 0%,
        rgba(0, 102, 204, 0.7) 25%,
        rgba(0, 102, 204, 1) 50%,
        rgba(0, 102, 204, 0.7) 75%,
        rgba(0, 102, 204, 0.4) 100%
    );
    background-size: 400% 400%;
    -webkit-mask: 
        linear-gradient(#fff 0 0) content-box, 
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    z-index: -1;
    animation: cardBorderGlow 4s ease-in-out infinite;
    opacity: 0.6;
    filter: blur(1px);
}

.vct-card::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 16px;
    padding: 2px;
    background: linear-gradient(
        135deg,
        rgba(0, 102, 204, 0.3) 0%,
        rgba(0, 102, 204, 0.6) 50%,
        rgba(0, 102, 204, 0.3) 100%
    );
    background-size: 200% 200%;
    -webkit-mask: 
        linear-gradient(#fff 0 0) content-box, 
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    z-index: -2;
    animation: cardBorderGlowReverse 5s ease-in-out infinite;
    opacity: 0.4;
    filter: blur(2px);
}

@keyframes cardBorderGlow {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

@keyframes cardBorderGlowReverse {
    0% {
        background-position: 100% 50%;
    }
    50% {
        background-position: 0% 50%;
    }
    100% {
        background-position: 100% 50%;
    }
}

.vct-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 20px rgba(0, 102, 204, 0.3);
}

.vct-card:hover::before {
    opacity: 0.8;
    filter: blur(0.5px);
}

.vct-card:hover::after {
    opacity: 0.5;
}

.vct-card h4 {
    font-size: 1.125rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-blue);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.vct-card h4 i {
    color: var(--primary-yellow);
    font-size: 1.25rem;
}

.vct-card p {
    margin: 0;
    font-size: 0.9375rem;
    color: var(--text-light);
    line-height: 1.6;
}

.org-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--primary-blue);
    font-weight: var(--font-weight-semibold);
}

.org-eyebrow::before {
    content: '';
    width: 32px;
    height: 2px;
    background: var(--gradient-yellow);
}

.organization-section {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    background: linear-gradient(135deg, #f8fafc 0%, #eef4ff 100%);
}

.org-intro {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.org-intro-text h2 {
    font-size: 2.25rem;
    margin: var(--spacing-sm) 0;
    color: var(--dark-blue);
}

.org-intro-text p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.org-pillars {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-sm);
}

.org-pillars li {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-dark);
}

.org-pillars i {
    color: var(--primary-blue);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.org-media {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.org-media img {
    border-radius: var(--radius-md);
    width: 100%;
    height: auto;
    object-fit: cover;
}

.org-media figcaption {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: var(--spacing-sm);
}

.org-chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.org-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    border-top: 4px solid var(--primary-blue);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.org-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(0, 102, 204, 0.15);
}

.org-level {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--primary-yellow);
    font-weight: var(--font-weight-semibold);
}

.org-card h3 {
    margin: var(--spacing-xs) 0 var(--spacing-sm);
    color: var(--dark-blue);
}

.org-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.org-card ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    color: var(--text-dark);
    font-weight: var(--font-weight-medium);
}

.org-card ul li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.org-card ul li::before {
    content: '•';
    color: var(--primary-blue);
}

.org-cta {
    margin-top: var(--spacing-xl);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
}

.btn-secondary-outline {
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-semibold);
    transition: all var(--transition-normal);
}

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

.about-design {
    padding: var(--spacing-xl) 0;
    background: var(--white);
}

.about-design-header {
    max-width: 820px;
    margin: 0 auto var(--spacing-xl);
    text-align: center;
}

.about-design-header h2 {
    font-size: 2.25rem;
    color: var(--dark-blue);
    margin: var(--spacing-sm) 0;
}

.about-design-header p {
    color: var(--text-light);
    line-height: 1.8;
}

.about-design-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
}

.design-card {
    background: linear-gradient(135deg, #ffffff 0%, #f6fbff 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg) var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.design-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, rgba(0, 102, 204, 0.15), transparent 45%);
    pointer-events: none;
}

.design-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 18px 45px rgba(0, 64, 128, 0.2);
}

.design-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-round);
    background: var(--gradient-primary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-md);
}

.design-card h3 {
    color: var(--dark-blue);
    margin-bottom: var(--spacing-xs);
    position: relative;
    z-index: 1;
}

.design-card p {
    color: var(--text-light);
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

@media (max-width: 992px) {
    .org-intro {
        grid-template-columns: 1fr;
    }

    .org-pillars {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .org-chart-grid {
        grid-template-columns: 1fr;
    }

    .about-design-header h2,
    .org-intro-text h2 {
        font-size: 1.75rem;
    }
}

/* SCROLL ANIMATION */
.vct-content-wrapper {
    opacity: 0;
    transform: translateY(40px);
    animation: fadeUp 0.8s ease forwards;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}


/* ========================================
   Products Section
   ======================================== */
.products {
    padding: var(--spacing-xl) 0;
    background: var(--light-gray);
}

.product-categories {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.category-btn {
    padding: 0.75rem 1.5rem;
    background: var(--white);
    color: var(--text-dark);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.category-btn:hover,
.category-btn.active {
    background: var(--gradient-yellow);
    color: var(--text-dark);
    box-shadow: var(--shadow-yellow);
    transform: translateY(-2px);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-md);
    align-items: stretch;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    height: 100%;
}

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

.product-image {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    flex-shrink: 0;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.product-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    padding: 0.5rem 1rem;
    background: var(--gradient-yellow);
    color: var(--text-dark);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.product-info {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.product-info h3 {
    font-size: 1.375rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.product-material {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9375rem;
    color: var(--accent-orange);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-sm);
}

.product-desc {
    font-size: 0.9375rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.product-features span {
    font-size: 0.875rem;
    color: var(--dark-blue);
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.375rem 0.75rem;
    background: var(--light-gray);
    border-radius: var(--radius-sm);
}

.product-features i {
    color: var(--primary-yellow);
}

.btn-quote {
    display: block;
    text-align: center;
    padding: 0.875rem;
    background: var(--gradient-primary);
    color: var(--white);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    margin-top: auto;
}

.btn-quote:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

/* Product Filter Animation */
.product-card.hidden {
    display: none;
}

/* ========================================
   Pricing Section
   ======================================== */
.pricing {
    padding: var(--spacing-xl) 0;
    background: var(--white);
}

.pricing-table-wrapper {
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-lg);
}

.pricing-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
}

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

.pricing-table th,
.pricing-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--gray);
}

.pricing-table th {
    font-weight: var(--font-weight-bold);
    font-size: 1.125rem;
}

.pricing-table tbody tr {
    transition: background var(--transition-fast);
}

.pricing-table tbody tr:hover {
    background: var(--light-gray);
}

.pricing-table td[data-label="Loại Sản Phẩm"] {
    font-weight: var(--font-weight-semibold);
    color: var(--primary-blue);
}

.pricing-table td[data-label="Loại Sản Phẩm"] i {
    color: var(--primary-yellow);
    margin-right: var(--spacing-xs);
}

.pricing-table td[data-label="Mức Giá"] {
    font-weight: var(--font-weight-bold);
    color: var(--accent-orange);
}

.pricing-note {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: #FFF9E6;
    border-left: 4px solid var(--primary-yellow);
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
}

.pricing-note i {
    font-size: 1.5rem;
    color: var(--primary-yellow);
    flex-shrink: 0;
}

.pricing-note p {
    margin: 0;
    color: var(--text-dark);
    line-height: 1.7;
}

.pricing-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* ========================================
   Process Section (Railway Timeline)
   ======================================== */
.process {
    padding: var(--spacing-xl) 0;
    background: var(--white);
    position: relative;
    overflow: hidden;
}

.process::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 10% 20%, rgba(0, 102, 204, 0.02) 0%, transparent 50%),
        radial-gradient(circle at 90% 80%, rgba(255, 184, 0, 0.02) 0%, transparent 50%);
    pointer-events: none;
}

.process-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.railway-timeline-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    padding: 60px 0;
}

/* Railway Background Line */
.railway-bg {
    position: absolute;
    top: 42px;
    left: 0;
    height: 6px;
    width: 100%;
    background: #E0E0E0;
    border-radius: 5px;
    z-index: 1;
}

/* Railway Active Line */
.railway-line {
    position: absolute;
    top: 42px;
    left: 0;
    height: 6px;
    width: 0;
    background: linear-gradient(90deg, #0066CC 0%, #FFB800 25%, #00C853 50%, #FF4444 75%, #0066CC 100%);
    border-radius: 5px;
    transition: width 0.7s ease-in-out;
    z-index: 2;
    box-shadow: 0 2px 8px rgba(0, 102, 204, 0.3);
}

/* Train Icon */
.train {
    position: absolute;
    top: 22px;
    left: 0;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #0066CC 0%, #004080 100%);
    border-radius: var(--radius-round);
    transition: left 0.7s ease-in-out, background 0.7s ease-in-out, box-shadow 0.7s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    z-index: 3;
    box-shadow: 0 4px 15px rgba(0, 102, 204, 0.4);
    transform: translateX(-20px);
}

.train.train-blue {
    background: linear-gradient(135deg, #0066CC 0%, #004080 100%);
    box-shadow: 0 4px 15px rgba(0, 102, 204, 0.4);
}

.train.train-yellow {
    background: linear-gradient(135deg, #FFB800 0%, #FF8C00 100%);
    box-shadow: 0 4px 15px rgba(255, 184, 0, 0.4);
}

.train.train-green {
    background: linear-gradient(135deg, #00C853 0%, #00BFA5 100%);
    box-shadow: 0 4px 15px rgba(0, 200, 83, 0.4);
}

.train.train-red {
    background: linear-gradient(135deg, #FF4444 0%, #D32F2F 100%);
    box-shadow: 0 4px 15px rgba(255, 68, 68, 0.4);
}

.train i {
    animation: trainBounce 0.5s ease-in-out infinite alternate;
}

@keyframes trainBounce {
    0% { transform: translateY(0); }
    100% { transform: translateY(-2px); }
}

/* Stations Container */
.railway-stations {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
    z-index: 4;
    flex-wrap: nowrap;
    gap: 0;
    width: 100%;
}

/* Station */
.station {
    position: relative;
    display: inline-block;
    flex: 1;
    min-width: 0;
    max-width: 10%;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.station:hover {
    transform: translateY(-5px);
}

.station-circle {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-round);
    border: 3px solid #999;
    background: var(--white);
    margin: 0 auto;
    position: relative;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
}

.station.active .station-circle {
    border-color: #0066CC;
    background: linear-gradient(135deg, #0066CC 0%, #004080 100%);
    box-shadow: 0 0 20px rgba(0, 102, 204, 0.6);
    transform: scale(1.1);
    animation: stationPulse 2s ease-in-out infinite, stationActivate 0.5s ease-out;
}

@keyframes stationActivate {
    0% {
        transform: scale(0.9);
        opacity: 0.7;
    }
    50% {
        transform: scale(1.15);
    }
    100% {
        transform: scale(1.1);
        opacity: 1;
    }
}

/* Tất cả stations đều dùng màu xanh dương khi active */
.station[data-step="2"].active .station-circle,
.station[data-step="3"].active .station-circle,
.station[data-step="4"].active .station-circle,
.station[data-step="5"].active .station-circle,
.station[data-step="6"].active .station-circle,
.station[data-step="7"].active .station-circle,
.station[data-step="8"].active .station-circle,
.station[data-step="9"].active .station-circle,
.station[data-step="10"].active .station-circle {
    border-color: #0066CC;
    background: linear-gradient(135deg, #0066CC 0%, #004080 100%);
    box-shadow: 0 0 20px rgba(0, 102, 204, 0.6);
}

@keyframes stationPulse {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 102, 204, 0.6);
    }
    50% {
        box-shadow: 0 0 30px rgba(0, 102, 204, 0.9);
    }
}

.station-circle i {
    font-size: 1.25rem;
    color: #999;
    transition: all var(--transition-normal);
    display: block;
}

.station.active .station-circle i {
    color: var(--white);
}

/* Animation Effects for Each Station Icon on Hover */

/* 1 - Envelope bounce */
.station:hover .icon-1 i {
    animation: iconBounce 0.6s infinite;
}

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

/* 2 - Money shake */
.station:hover .icon-2 i {
    animation: iconShake 0.5s infinite;
}

@keyframes iconShake {
    0%, 100% { transform: rotate(0); }
    25% { transform: rotate(8deg); }
    75% { transform: rotate(-8deg); }
}

/* 3 - Handshake pulse */
.station:hover .icon-3 i {
    animation: iconPulse 0.6s infinite;
}

@keyframes iconPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

/* 4 - Brush painting motion */
.station:hover .icon-4 i {
    animation: iconPaint 0.6s infinite;
}

@keyframes iconPaint {
    0% { transform: rotate(0); }
    50% { transform: rotate(-20deg) translateX(-4px); }
    100% { transform: rotate(0); }
}

/* 5 - Stamp */
.station:hover .icon-5 i {
    animation: iconStamp 0.5s infinite;
}

@keyframes iconStamp {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(6px); }
}

/* 6 - Print roll */
.station:hover .icon-6 i {
    animation: iconRoll 0.6s infinite linear;
}

@keyframes iconRoll {
    0% { transform: rotate(0); }
    100% { transform: rotate(360deg); }
}

/* 7 - Layer ripple */
.station:hover .icon-7 i {
    animation: iconRipple 0.7s infinite;
}

@keyframes iconRipple {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* 8 - Scissors cutting */
.station:hover .icon-8 i {
    animation: iconCut 0.6s infinite;
}

@keyframes iconCut {
    0% { transform: rotate(0); }
    50% { transform: rotate(20deg); }
    100% { transform: rotate(0); }
}

/* 9 - Box pop */
.station:hover .icon-9 i {
    animation: iconPop 0.6s infinite;
}

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

/* 10 - Truck driving */
.station:hover .icon-10 i {
    animation: iconDrive 0.7s infinite;
}

@keyframes iconDrive {
    0% { transform: translateX(0); }
    50% { transform: translateX(10px); }
    100% { transform: translateX(0); }
}

.station-number {
    margin-top: var(--spacing-xs);
    font-weight: var(--font-weight-bold);
    color: var(--text-dark);
    font-size: 0.875rem;
    transition: all var(--transition-normal);
}

.station.active .station-number {
    color: var(--primary-blue);
    font-size: 1.125rem;
    animation: numberPop 0.3s ease-out;
}

@keyframes numberPop {
    0% { transform: scale(0.8); opacity: 0.5; }
    100% { transform: scale(1); opacity: 1; }
}

.station-title {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: var(--spacing-xs);
    line-height: 1.3;
    transition: all var(--transition-normal);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.station.active .station-title {
    color: var(--text-dark);
    font-weight: var(--font-weight-medium);
    animation: titleFadeIn 0.4s ease-out;
}

@keyframes titleFadeIn {
    0% { opacity: 0; transform: translateY(5px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* ========================================
   Order Form Section
   ======================================== */
.order-form {
    padding: var(--spacing-xl) 0;
    background: var(--white);
}

.form-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.quote-form {
    background: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

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

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-weight: var(--font-weight-semibold);
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.form-group label i {
    color: var(--primary-blue);
    margin-right: 0.25rem;
}

.required {
    color: #FF0000;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--gray);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    transition: border var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.form-group textarea {
    resize: vertical;
}

.file-upload-wrapper {
    position: relative;
}

.file-upload-wrapper input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.file-upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    border: 2px dashed var(--gray);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    background: var(--white);
}

.file-upload-label:hover {
    border-color: var(--primary-blue);
    background: var(--light-gray);
}

.file-upload-label i {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.file-upload-label span {
    font-weight: var(--font-weight-medium);
    color: var(--text-dark);
}

.file-upload-label small {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.file-list {
    margin-top: var(--spacing-sm);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.form-actions .btn {
    flex: 1;
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: none;
}

.form-message.success {
    display: block;
    background: #D4EDDA;
    color: #155724;
    border: 1px solid #C3E6CB;
}

.form-message.error {
    display: block;
    background: #F8D7DA;
    color: #721C24;
    border: 1px solid #F5C6CB;
}

.contact-info-sidebar {
    background: var(--gradient-primary);
    color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.contact-info-sidebar h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-bold);
}

.contact-method {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition-normal);
    overflow: hidden;
    box-sizing: border-box;
    width: 100%;
}

.contact-method:last-child {
    margin-bottom: 0;
}

.contact-method:hover {
    background: rgba(255, 255, 255, 0.15);
}

.contact-method i {
    font-size: 1.5rem;
    color: var(--primary-yellow);
    flex-shrink: 0;
    margin-top: 2px;
    width: 24px;
    text-align: center;
}

.contact-content {
    flex: 1;
    min-width: 0;
    line-height: 1.6;
    overflow-wrap: anywhere;
    word-wrap: break-word;
    max-width: 100%;
    overflow: hidden;
    box-sizing: border-box;
}

.contact-content strong {
    display: block;
    margin-bottom: 0.25rem;
    font-weight: var(--font-weight-semibold);
    white-space: nowrap;
}

.contact-content a {
    color: var(--white);
    word-break: break-all;
    overflow-wrap: anywhere;
    display: block;
    width: 100%;
    max-width: 100%;
    text-decoration: none;
    transition: color var(--transition-fast);
    word-wrap: break-word;
    overflow: hidden;
    box-sizing: border-box;
}

.contact-content a:hover {
    color: var(--primary-yellow);
    text-decoration: underline;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    padding: var(--spacing-xl) 0;
    background: var(--light-gray);
}

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

.contact-details {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-card {
    position: relative;
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

/* ⭐ 1. iOS Glassmorphism Effect */
.contact-card::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(135deg, 
        rgba(0, 102, 204, 0.15) 0%, 
        rgba(0, 102, 204, 0.05) 100%);
    border-radius: var(--radius-lg);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.5s ease;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

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

/* ⭐ 4. iOS Border Glow - Blue */
.contact-card::after {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    border-radius: var(--radius-lg);
    padding: 1px;
    background: linear-gradient(135deg, 
        rgba(0, 102, 204, 0.6),
        rgba(0, 102, 204, 0.2),
        rgba(0, 102, 204, 0.6)
    );
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.contact-card:hover::after {
    opacity: 1;
}

/* ⭐ 2. Shine Reflection Premium - Blue from top */
.contact-card .shine {
    position: absolute;
    top: -50%;
    left: -100%;
    width: 60%;
    height: 200%;
    background: linear-gradient(
        20deg,
        transparent 30%,
        rgba(0, 102, 204, 0.3) 50%,
        transparent 70%
    );
    transform: rotate(20deg);
    transition: left 1.2s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    filter: blur(8px);
    z-index: 2;
}

.contact-card:hover .shine {
    left: 150%;
}

/* ⭐ 3. Elevation Smart Lift */
.contact-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 102, 204, 0.2),
                0 0 0 1px rgba(0, 102, 204, 0.1);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.contact-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-yellow);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--white);
    box-shadow: 0 8px 20px rgba(255, 184, 0, 0.25);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    position: relative;
    z-index: 1;
}

/* ⭐ 5. Icon Motion 3D Soft - Tilt with Blue Glow */
.contact-card:hover .contact-icon {
    transform: perspective(600px) rotateY(8deg) rotateX(-4deg);
    box-shadow: 0 12px 28px rgba(0, 102, 204, 0.4);
    background: linear-gradient(135deg, #0066CC, #004080);
}

.contact-card:hover .contact-icon i {
    transform: scale(1.1);
    filter: drop-shadow(0 0 8px rgba(0, 102, 204, 0.6));
    transition: all 0.4s ease;
}

.contact-card h3 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
    transition: color 0.3s ease;
    position: relative;
    z-index: 1;
}

.contact-card:hover h3 {
    color: #0066CC;
}

.contact-card p,
.contact-card a {
    color: var(--text-light);
    line-height: 1.8;
    transition: color 0.3s ease;
    position: relative;
    z-index: 1;
}

.contact-card:hover p {
    color: #4B5563;
}

.contact-card a:hover {
    color: #0066CC;
}

.map-container {
    margin-top: var(--spacing-xl);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.social-links {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.social-links h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.social-icons a {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-round);
    font-size: 1.25rem;
    transition: all var(--transition-normal);
}

.social-icons a:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: var(--shadow-md);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-col h4 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    color: var(--primary-yellow);
}

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-logo img {
    height: 80px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    background: var(--white);
    padding: var(--spacing-xs);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    transition: all var(--transition-normal);
}

.footer-logo img:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 184, 0, 0.3);
}

.footer-logo h3 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-yellow);
    margin-top: var(--spacing-xs);
}

.footer-col p {
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
}

.footer-col ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

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

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.footer-contact i {
    color: var(--primary-yellow);
    margin-top: 3px;
    flex-shrink: 0;
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-round);
    color: var(--white);
    transition: all var(--transition-normal);
}

.footer-social a:hover {
    background: var(--primary-yellow);
    color: var(--text-dark);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom p {
    margin: 0.25rem 0;
}

/* ========================================
   Back to Top Button
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-yellow);
    color: var(--text-dark);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   Floating Contact Buttons
   ======================================== */
.floating-contacts {
    position: fixed;
    bottom: 100px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: 998;
}

.floating-btn {
    width: 55px;
    height: 55px;
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    animation: pulse 2s infinite;
}

.floating-btn:hover {
    transform: scale(1.1);
    animation: none;
}

.phone-btn {
    background: linear-gradient(135deg, #00C853 0%, #00BFA5 100%);
}

.zalo-btn {
    background: linear-gradient(135deg, #0068FF 0%, #0088FF 100%);
}

.messenger-btn {
    background: linear-gradient(135deg, #00B2FF 0%, #006AFF 100%);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(0, 102, 204, 0.7);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(0, 102, 204, 0);
    }
}

/* ========================================
   Responsive Design
   ======================================== */

/* Tablet Devices */
@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        align-items: flex-start;
        padding: var(--spacing-xl);
        box-shadow: var(--shadow-lg);
        transition: right var(--transition-normal);
    }

    .nav-menu.active {
        right: 0;
    }

    .hamburger {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .vct-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

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

    .vct-images-wrapper {
        position: static;
        order: -1;
    }

    .vct-content-wrapper {
        padding: var(--spacing-lg);
    }

    .vct-content-wrapper h2 {
        font-size: 32px;
    }

    .vct-content-wrapper h3 {
        font-size: 20px;
    }

    .image-frame-inner {
        padding-bottom: 65%;
    }

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

    .contact-info-sidebar {
        position: static;
    }

    .railway-timeline-container {
        padding: 40px 0;
    }

    .railway-stations {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
    }

    .station {
        width: 100%;
        max-width: 300px;
        display: flex;
        flex-direction: row;
        align-items: center;
        text-align: left;
        gap: var(--spacing-md);
    }

    .station-circle {
        width: 50px;
        height: 50px;
        flex-shrink: 0;
    }

    .station-circle i {
        font-size: 1.25rem;
    }

    .station-number {
        margin-top: 0;
        margin-right: var(--spacing-xs);
        font-size: 1.125rem;
    }

    .station-title {
        font-size: 0.9375rem;
        margin-top: 0;
        flex: 1;
    }

    .railway-bg,
    .railway-line {
        display: none;
    }

    .train {
        display: none;
    }
}

/* Mobile Devices */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 2.5rem;
        --spacing-lg: 2rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-description {
        font-size: 1rem;
    }

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

    .hero-stats {
        gap: var(--spacing-md);
    }

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

    .section-title {
        font-size: 2rem;
    }

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

    .brand-slide {
        width: 180px;
        height: 140px;
    }

    .brand-logo {
        padding: var(--spacing-sm);
    }

    .brand-logo img {
        filter: grayscale(10%) brightness(0.98);
    }

    .brands-carousel-wrapper::before,
    .brands-carousel-wrapper::after {
        width: 100px;
    }

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

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

    .timeline-steps {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .flow-line-bg,
    .flow-line-active {
        display: none;
    }

    .timeline-step {
        margin-bottom: var(--spacing-md);
    }

    .step-number {
        top: -20px;
    }

    .pricing-table {
        font-size: 0.875rem;
    }

    .pricing-table th,
    .pricing-table td {
        padding: var(--spacing-sm);
    }

    .pricing-table thead {
        display: none;
    }

    .pricing-table tr {
        display: block;
        margin-bottom: var(--spacing-md);
        border: 1px solid var(--gray);
        border-radius: var(--radius-md);
    }

    .pricing-table td {
        display: flex;
        justify-content: space-between;
        padding: var(--spacing-sm) var(--spacing-md);
        border: none;
    }

    .pricing-table td::before {
        content: attr(data-label);
        font-weight: var(--font-weight-bold);
        color: var(--primary-blue);
    }

    .form-actions {
        flex-direction: column;
    }

    .floating-contacts {
        bottom: 80px;
        right: 15px;
    }

    .floating-btn {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }

    .back-to-top {
        bottom: 15px;
        right: 15px;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .logo {
        min-width: 120px;
        padding: 6px 0;
    }

    .logo img {
        height: 50px;
        max-width: 150px;
        min-width: 120px;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .product-card {
        min-width: 100%;
    }

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

/* Print Styles */
@media print {
    .navbar,
    .floating-contacts,
    .back-to-top,
    .hamburger {
        display: none;
    }
}

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}