/* ===== GENERAL STYLES ===== */
:root {
    /* Màu sắc chính */
    --color-black: #000000;
    --color-dark-gray: #1a1a1a;
    --color-darker-gray: #222222;
    --color-white: #ffffff!important;
    
    /* Màu sắc phụ */
    --color-light-gray: #f5f5f5;
    --color-gray: #e0e0e0;
    --color-blue: #3182ce;
    --color-light-blue: #4299e1;
    --color-cyan: #00c8ff;
    
    /* Gradient */
    --gradient-inox: linear-gradient(135deg, #c0c0c0 0%, #e8e8e8 100%);
    --gradient-dark: linear-gradient(135deg, #000000 0%, #333333 100%);
    --gradient-blue: linear-gradient(135deg, #0a62a9 0%, #4299e1 100%);
    --gradient-water: linear-gradient(135deg, #004e92 0%, #000428 100%);
    
    /* Typography */
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    
    /* Transition */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-index-dropdown: 10;
    --z-index-sticky: 20;
    --z-index-fixed: 30;
    --z-index-modal: 40;
    --z-index-tooltip: 50;
}

.water-filter-page * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.water-filter-page body {
    font-family: 'Montserrat', sans-serif;
    color: var(--color-white);
    background-color: var(--color-black);
    line-height: 1.6;
    overflow-x: hidden;
}

.water-filter-page .container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.water-filter-page h1, 
.water-filter-page h2, 
.water-filter-page h3, 
.water-filter-page h4, 
.water-filter-page h5, 
.water-filter-page h6 {
    margin: 0;
    line-height: 1.3;
}

.water-filter-page a {
    text-decoration: none;
    color: #ffffff!important;
    transition: color var(--transition-normal);
}

.water-filter-page a:hover {
    color: var(--color-light-blue);
}

.water-filter-page img {
    max-width: 100%;
    height: auto;
}

.water-filter-page ul {
    list-style: none;
}

/* ===== UTILITIES ===== */
.water-filter-page .text-center {
    text-align: center;
}

.water-filter-page .hidden {
    display: none;
}

/* ===== HEADER STYLES ===== */
.water-filter-page .header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-index-sticky);
    transition: background-color var(--transition-normal);
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
}

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

.water-filter-page .logo {
    flex-shrink: 0;
}

.water-filter-page .logo-text {
    font-size: 1.8rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 2px;
}

.water-filter-page .navigation {
    display: none;
}

.water-filter-page .nav-link {
    margin: 0 var(--spacing-sm);
    font-weight: var(--font-weight-medium);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-gray);
    position: relative;
}

.water-filter-page .nav-link:hover,
.water-filter-page .nav-link.active {
    color: var(--color-white);
}

.water-filter-page .nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-blue);
    transition: width var(--transition-normal);
}

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

.water-filter-page .header-buttons {
    display: flex;
    align-items: center;
}

.water-filter-page .header-icons {
    display: flex;
    margin-left: var(--spacing-sm);
}

.water-filter-page .icon-button {
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 1.2rem;
    cursor: pointer;
    margin-left: var(--spacing-xs);
    padding: var(--spacing-xs);
    transition: color var(--transition-normal);
}

.water-filter-page .icon-button:hover {
    color: var(--color-light-blue);
}

.water-filter-page .menu-toggle {
    display: block;
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 1.5rem;
    cursor: pointer;
    margin-left: var(--spacing-sm);
}

.water-filter-page .mobile-menu {
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    display: none;
    transform: translateY(-100%);
    opacity: 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
    z-index: var(--z-index-dropdown);
}

.water-filter-page .mobile-menu.active {
    display: block;
    transform: translateY(0);
    opacity: 1;
}

.water-filter-page .mobile-menu-links {
    display: flex;
    flex-direction: column;
    margin-bottom: var(--spacing-md);
}

.water-filter-page .mobile-link {
    padding: var(--spacing-sm) 0;
    font-weight: var(--font-weight-medium);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.water-filter-page .mobile-link.active {
    color: var(--color-light-blue);
}

.water-filter-page .mobile-buttons {
    margin-top: var(--spacing-md);
}

.water-filter-page .btn {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    border-radius: var(--border-radius-sm);
    font-weight: var(--font-weight-medium);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    font-size: 0.9rem;
}

.water-filter-page .btn-primary {
    background: var(--gradient-blue);
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(65, 132, 234, 0.2);
}

.water-filter-page .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(65, 132, 234, 0.3);
    color: var(--color-white);
}

.water-filter-page .btn-glass {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.7rem 1.5rem;
    border-radius: var(--border-radius-sm);
    display: inline-flex;
    align-items: center;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-normal);
}

.water-filter-page .btn-glass i {
    margin-left: var(--spacing-xs);
    font-size: 1.2rem;
}

.water-filter-page .btn-glass:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    color: var(--color-white);
}

.water-filter-page .btn-outline {
    background: transparent;
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 0.7rem 1.5rem;
    border-radius: var(--border-radius-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-normal);
}

.water-filter-page .btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-white);
    transform: translateY(-2px);
    color: var(--color-white);
}

.water-filter-page .full-width {
    width: 100%;
}

/* ===== HERO SECTION ===== */
.water-filter-page .hero-section {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 80px;
}

.water-filter-page .hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: 1;
    filter: brightness(0.5);
}

.water-filter-page .hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.3) 0%, rgba(0, 0, 0, 0.5) 100%);
}

.water-filter-page .hero-content {
    text-align: center;
    max-width: 800px;
    padding: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.water-filter-page .water-drop-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(65, 132, 234, 0.2);
    font-size: 2rem;
    color: var(--color-cyan);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(65, 132, 234, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(65, 132, 234, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(65, 132, 234, 0);
    }
}

.water-filter-page .hero-section h1 {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    color: #ffffff!important;
}

.water-filter-page .hero-subtitle {
    font-size: 1.2rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-md);
    color: var(--color-light-blue);
}

.water-filter-page .hero-description {
    font-size: 1rem;
    font-weight: var(--font-weight-light);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    color: #ffffff!important;
}

/* ===== PARALLAX BACKGROUNDS ===== */
.water-filter-page .section-bg,
.water-filter-page .parallax-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: -1;
    filter: brightness(0.3);
}

.water-filter-page .section-bg::after,
.water-filter-page .parallax-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.9) 100%);
    backdrop-filter: blur(5px);
}

/* ===== COMMON BACKGROUND CONTAINER ===== */
.water-filter-page .common-bg-container {
    position: relative;
    background-image: url('../images/kitchen-modern-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.water-filter-page .common-bg-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom, 
        rgba(0, 0, 0, 0.3) 0%, 
        rgba(0, 0, 0, 0.2) 50%, 
        rgba(0, 0, 0, 0.3) 100%
    );
    z-index: 1;
    pointer-events: none;
}

.water-filter-page .common-bg-container > section {
    position: relative;
    z-index: 2;
}

/* ===== INTEGRATED FILTER SECTION ===== */
.water-filter-page .integrated-filter-section {
    padding: var(--spacing-xxl) 0;
    position: relative;
    overflow: hidden;
    z-index: 2;
    background-color: transparent;
}

.water-filter-page .integrated-filter-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(26, 26, 26, 0.6);
    z-index: 1;
    pointer-events: none;
}

.water-filter-page .integrated-filter-section .container {
    position: relative;
    z-index: 2;
}

.water-filter-page .dual-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.water-filter-page .content-image {
    flex: 1;
    margin-bottom: var(--spacing-lg);
}

.water-filter-page .image-container {
    border-radius: var(--border-radius-md);
    overflow: hidden;
    position: relative;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    transition: all var(--transition-normal);
}

.water-filter-page .image-container:hover {
    transform: scale(1.02);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
}

.water-filter-page .image-container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0.7) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.water-filter-page .image-container:hover::after {
    opacity: 1;
}

.water-filter-page .content-text {
    flex: 1;
    padding: var(--spacing-lg) 0;
}

.water-filter-page .section-title {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    color: #ffffff!important;
    justify-content: flex-start;
}

.water-filter-page .section-title i {
    font-size: 1.5rem;
    margin-right: var(--spacing-xs);
    color: var(--color-light-blue);
}

.water-filter-page .section-description {
    font-size: 1.1rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-md);
    color: var(--color-light-gray);
}

.water-filter-page .feature-list {
    margin-bottom: var(--spacing-lg);
}

.water-filter-page .feature-list li {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.water-filter-page .feature-list i {
    color: var(--color-light-blue);
    font-size: 1.2rem;
    margin-right: var(--spacing-sm);
    flex-shrink: 0;
    margin-top: 3px;
}

.water-filter-page .feature-list span {
    flex: 1;
    color: #ffffff!important;
}

/* ===== GREEN SECTION ===== */
.water-filter-page .green-section {
    padding: var(--spacing-xxl) 0;
    position: relative;
    overflow: hidden;
    z-index: 2;
    background-color: transparent;
}

.water-filter-page .green-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 78, 146, 0.6) 0%, rgba(0, 4, 40, 0.6) 100%);
    z-index: 1;
    pointer-events: none;
}

.water-filter-page .green-section .container {
    position: relative;
    z-index: 2;
}

.water-filter-page .water-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.2;
    z-index: 0;
}

.water-filter-page .triple-content {
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

.water-filter-page .icon-column {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.water-filter-page .filter-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(0, 200, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--color-cyan);
}

.water-filter-page .text-column {
    margin-bottom: var(--spacing-lg);
}

.water-filter-page .feature-list.alt li {
    background: rgba(0, 0, 0, 0.2);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition-normal);
}

.water-filter-page .feature-list.alt li:hover {
    background: rgba(0, 0, 0, 0.4);
    transform: translateX(5px);
}

.water-filter-page .filter-tabs {
    display: flex;
    margin: var(--spacing-lg) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.water-filter-page .tab-btn {
    background: none;
    border: none;
    color: var(--color-gray);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    position: relative;
    transition: all var(--transition-normal);
}

.water-filter-page .tab-btn::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-light-blue);
    transition: width var(--transition-normal);
}

.water-filter-page .tab-btn:hover,
.water-filter-page .tab-btn.active {
    color: var(--color-white);
}

.water-filter-page .tab-btn.active::after {
    width: 100%;
}

.water-filter-page .tab-content {
    display: none;
    padding: var(--spacing-md) 0;
}

.water-filter-page .tab-content.active {
    display: block;
    animation: fadeIn 0.5s forwards;
    color: #ffffff!important;
}

.water-filter-page .image-column {
    position: relative;
}

.water-filter-page .tab-images {
    position: relative;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.water-filter-page .tab-image {
    display: none;
    width: 100%;
    transition: all var(--transition-normal);
}

.water-filter-page .tab-image.active {
    display: block;
    animation: fadeIn 0.5s forwards;
}

/* ===== CTA SECTION ===== */
.water-filter-page .cta-section {
    padding: var(--spacing-xxl) 0;
    position: relative;
    overflow: hidden;
    z-index: 2;
    background-color: transparent;
}

.water-filter-page .cta-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1;
    pointer-events: none;
}

.water-filter-page .cta-section .container {
    position: relative;
    z-index: 2;
}

.water-filter-page .water-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/water-particles.png') center/cover no-repeat;
    opacity: 0.2;
    animation: waterMove 20s linear infinite;
}

@keyframes waterMove {
    0% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-20px) scale(1.05);
    }
    100% {
        transform: translateY(0) scale(1);
    }
}

.water-filter-page .cta-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.water-filter-page .cta-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xl);
}

.water-filter-page .cta-benefits {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.water-filter-page .benefit {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-normal);
}

.water-filter-page .benefit:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

.water-filter-page .benefit i {
    font-size: 2rem;
    color: var(--color-light-blue);
    margin-right: var(--spacing-md);
}

.water-filter-page .benefit p {
    font-size: 1.1rem;
    font-weight: var(--font-weight-medium);
}

.water-filter-page .cta-button {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    margin-top: var(--spacing-md);
}

/* ===== FOOTER STYLES ===== */
.water-filter-page .footer {
    background-color: #050505;
    padding: var(--spacing-xl) 0 var(--spacing-md);
    position: relative;
}

.water-filter-page .footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.water-filter-page .footer-column {
    display: flex;
    flex-direction: column;
}

.water-filter-page .footer-logo {
    font-size: 1.8rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
}

.water-filter-page .footer-text {
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
    font-size: 0.9rem;
}

.water-filter-page .social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.water-filter-page .social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
}

.water-filter-page .social-link:hover {
    background: var(--color-blue);
    transform: translateY(-3px);
}

.water-filter-page .footer-title {
    font-size: 1.1rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-bottom: var(--spacing-xs);
}

.water-filter-page .footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--color-blue);
}

.water-filter-page .footer-links li,
.water-filter-page .footer-info li {
    margin-bottom: var(--spacing-xs);
}

.water-filter-page .footer-links a:hover {
    color: var(--color-light-blue);
    transform: translateX(3px);
    display: inline-block;
}

.water-filter-page .footer-info {
    color: var(--color-gray);
    font-size: 0.9rem;
}

.water-filter-page .footer-info a {
    color: var(--color-gray);
}

.water-filter-page .footer-info a:hover {
    color: var(--color-white);
}

.water-filter-page .footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.water-filter-page .copyright {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: var(--spacing-sm);
}

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

.water-filter-page .footer-legal a {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
}

.water-filter-page .footer-legal a:hover {
    color: var(--color-white);
}

/* ===== RESPONSIVE STYLES ===== */
@media (min-width: 640px) {
    .water-filter-page .hero-section h1 {
        font-size: 3rem;
    }
    
    .water-filter-page .hero-subtitle {
        font-size: 1.3rem;
    }
    
    .water-filter-page .cta-benefits {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .water-filter-page .benefit {
        flex: 0 0 calc(50% - var(--spacing-md));
    }
}

@media (min-width: 768px) {
    .water-filter-page .navigation {
        display: flex;
    }
    
    .water-filter-page .menu-toggle {
        display: none;
    }
    
    .water-filter-page .dual-content {
        flex-direction: row;
        gap: var(--spacing-xl);
    }
    
    .water-filter-page .content-image, 
    .water-filter-page .content-text {
        flex: 0 0 calc(50% - var(--spacing-lg) / 2);
    }
    
    .water-filter-page .triple-content {
        flex-direction: row;
        gap: var(--spacing-lg);
    }
    
    .water-filter-page .icon-column {
        flex: 0 0 15%;
        margin-bottom: 0;
    }
    
    .water-filter-page .text-column {
        flex: 0 0 50%;
        margin-bottom: 0;
    }
    
    .water-filter-page .image-column {
        flex: 0 0 35%;
    }
    
    .water-filter-page .footer-content {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
    
    .water-filter-page .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
    
    .water-filter-page .copyright {
        margin-bottom: 0;
    }
}

@media (min-width: 1024px) {
    .water-filter-page .hero-section h1 {
        font-size: 3.5rem;
    }
    
    .water-filter-page .hero-content {
        max-width: 900px;
    }
    
    .water-filter-page .benefit {
        flex: 1;
    }
    
    /* Tăng cường hiệu ứng parallax trên desktop */
    .water-filter-page .common-bg-container {
        background-attachment: fixed;
    }
}

/* Responsive adjustments */
@media (max-width: 767px) {
    /* Tăng độ tương phản cho mobile để dễ đọc */
    .water-filter-page .integrated-filter-section::after {
        background-color: rgba(26, 26, 26, 0.8);
    }
    
    .water-filter-page .green-section::after {
        background: linear-gradient(135deg, rgba(0, 78, 146, 0.8) 0%, rgba(0, 4, 40, 0.8) 100%);
    }
    
    .water-filter-page .cta-bg {
        background-color: rgba(0, 0, 0, 0.7);
    }
    
    .water-filter-page .hero-bg::after {
        background: linear-gradient(to bottom, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.6) 100%);
    }
}

/* Hiệu ứng smooth scroll cho toàn bộ trang */
.water-filter-page {
    scroll-behavior: smooth;
}

/* MOBILE OPTIMIZATIONS - Water Filter Page - Đồng bộ với Home */
@media (max-width: 768px) {
    /* Typography - đồng bộ với home, about, products */
    .water-filter-page .hero-section h1 {
        font-size: 28px !important; /* Đồng bộ với home */
        line-height: 1.1 !important;
        margin-bottom: 16px !important;
    }
    
    .water-filter-page .hero-subtitle {
        font-size: 16px !important; /* Đồng bộ với home */
        margin-bottom: 16px !important;
        line-height: 1.4 !important;
    }
    
    .water-filter-page .hero-description {
        font-size: 14px !important; /* Đồng bộ với home */
        margin-bottom: 24px !important;
        line-height: 1.5 !important;
        text-align: left !important; /* Better mobile reading */
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    
    .water-filter-page .section-title {
        font-size: 24px !important; /* Đồng bộ với home section-title */
        margin-bottom: 16px !important;
        line-height: 1.2 !important;
        justify-content: center !important; /* Center align on mobile */
        text-align: center;
    }
    
    .water-filter-page .section-description {
        font-size: 14px !important; /* Đồng bộ với home */
        margin-bottom: 16px !important;
        line-height: 1.5 !important;
        text-align: center !important;
    }
    
    .water-filter-page .cta-title {
        font-size: 24px !important; /* Đồng bộ section title */
        margin-bottom: 24px !important;
        line-height: 1.2 !important;
    }
    
    /* Spacing optimizations - đồng bộ với home */
    .water-filter-page .integrated-filter-section,
    .water-filter-page .green-section,
    .water-filter-page .cta-section {
        padding: 40px 0 !important; /* Đồng bộ với home */
    }
    
    .water-filter-page .container {
        padding: 0 16px !important; /* Đồng bộ với home */
    }
    
    /* Hero mobile optimizations */
    .water-filter-page .hero-section {
        min-height: 70vh !important; /* Giảm từ 100vh như home */
        height: 70vh !important;
        padding-top: 60px; /* Account for header */
    }
    
    .water-filter-page .hero-content {
        padding: 16px !important; /* Consistent padding */
        max-width: 100% !important;
    }
    
    /* Water drop icon mobile */
    .water-filter-page .water-drop-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        margin-bottom: 16px !important;
    }
    
    /* Layout optimizations */
    .water-filter-page .dual-content {
        flex-direction: column !important;
        gap: 24px !important; /* Smaller gap */
    }
    
    .water-filter-page .content-image {
        margin-bottom: 20px !important;
        order: -1; /* Image first on mobile */
    }
    
    .water-filter-page .content-text {
        padding: 0 !important;
        text-align: center !important;
    }
    
    .water-filter-page .triple-content {
        flex-direction: column !important;
        gap: 20px !important;
    }
    
    .water-filter-page .icon-column {
        margin-bottom: 16px !important;
    }
    
    .water-filter-page .filter-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
    
    .water-filter-page .text-column {
        margin-bottom: 20px !important;
        text-align: center !important;
    }
    
    .water-filter-page .image-column {
        order: -1; /* Image first on mobile */
    }
    
    /* Feature list mobile optimization */
    .water-filter-page .feature-list li {
        margin-bottom: 12px !important; /* Smaller spacing */
        text-align: left !important;
        padding: 8px 0;
    }
    
    .water-filter-page .feature-list i {
        font-size: 16px !important; /* Smaller icons */
        margin-right: 12px !important;
        margin-top: 2px;
    }
    
    .water-filter-page .feature-list span {
        font-size: 14px !important; /* Smaller text */
        line-height: 1.4;
    }
    
    /* Tabs mobile optimization */
    .water-filter-page .filter-tabs {
        justify-content: center;
        flex-wrap: wrap;
        gap: 8px;
        margin: 16px 0 !important;
    }
    
    .water-filter-page .tab-btn {
        padding: 8px 16px !important; /* Smaller padding */
        font-size: 14px !important; /* Smaller font */
        min-height: 44px; /* Touch-friendly */
        border-radius: 4px;
        background: rgba(255, 255, 255, 0.1);
    }
    
    .water-filter-page .tab-content {
        padding: 16px 0 !important;
        font-size: 14px !important;
        text-align: center !important;
    }
    
    /* CTA section mobile */
    .water-filter-page .cta-benefits {
        flex-direction: column !important;
        gap: 16px !important;
        margin-bottom: 24px !important;
    }
    
    .water-filter-page .benefit {
        flex-direction: column !important;
        text-align: center !important;
        padding: 16px !important; /* Smaller padding */
        gap: 8px;
    }
    
    .water-filter-page .benefit i {
        font-size: 1.5rem !important; /* Smaller icons */
        margin-right: 0 !important;
        margin-bottom: 8px;
    }
    
    .water-filter-page .benefit p {
        font-size: 14px !important; /* Smaller text */
        margin: 0;
    }
    
    /* Button optimizations */
    .water-filter-page .btn-glass,
    .water-filter-page .btn-outline,
    .water-filter-page .btn-primary {
        padding: 12px 24px !important; /* Smaller padding */
        font-size: 14px !important; /* Smaller font */
        min-height: 44px !important; /* Touch-friendly */
        width: 100% !important; /* Full width on mobile */
        justify-content: center !important;
        margin-top: 16px !important;
        text-align: center !important;
    }
    
    .water-filter-page .btn-glass i {
        margin-left: 8px !important;
        font-size: 16px !important;
    }
    
    /* Background optimizations for mobile performance */
    .water-filter-page .hero-bg,
    .water-filter-page .common-bg-container,
    .water-filter-page .section-bg,
    .water-filter-page .parallax-bg {
        background-attachment: scroll !important; /* Better mobile performance */
        background-size: cover !important;
        background-position: center !important;
        filter: brightness(1) !important; /* Slightly brighter for mobile */
    }
    
    .water-filter-page .common-bg-container::before {
        background: linear-gradient(
            to bottom, 
            rgba(0, 0, 0, 0.4) 0%, 
            rgba(0, 0, 0, 0.3) 50%, 
            rgba(0, 0, 0, 0.4) 100%
        ) !important; /* Lighter overlay */
    }
    
    /* Image optimizations */
    .water-filter-page .image-container {
        margin-bottom: 16px;
    }
    
    .water-filter-page .tab-images {
        max-height: 250px; /* Limit height on mobile */
        overflow: hidden;
    }
    
    /* Animation optimizations for mobile */
    .water-filter-page [data-aos] {
        animation: none !important; /* Disable complex animations on mobile */
        opacity: 1 !important;
        transform: none !important;
    }
    
    .water-filter-page .water-drop-icon {
        animation: none !important; /* Disable pulse animation */
    }
    
    .water-filter-page .water-particles {
        animation: none !important; /* Disable particle animation */
        opacity: 0.1 !important;
    }
    
    /* Footer mobile optimization */
    .water-filter-page .footer {
        padding: 32px 0 16px !important; /* Compact footer */
    }
    
    .water-filter-page .footer-content {
        grid-template-columns: 1fr !important; /* Single column */
        gap: 24px !important;
        margin-bottom: 24px !important;
    }
    
    .water-filter-page .footer-column {
        text-align: center !important;
    }
    
    .water-filter-page .footer-title {
        font-size: 16px !important; /* Smaller titles */
        margin-bottom: 12px !important;
    }
    
    .water-filter-page .footer-text {
        font-size: 14px !important;
        margin-bottom: 16px !important;
    }
    
    .water-filter-page .social-links {
        justify-content: center !important;
        gap: 12px !important;
    }
    
    .water-filter-page .footer-links a,
    .water-filter-page .footer-info {
        font-size: 13px !important;
    }
    
    .water-filter-page .footer-bottom {
        flex-direction: column !important;
        gap: 12px !important;
        text-align: center !important;
    }
    
    .water-filter-page .footer-legal {
        gap: 16px !important;
        justify-content: center !important;
    }
    
    /* Header mobile adjustment */
    .water-filter-page .header-content {
        height: 60px !important; /* Smaller header */
    }
    
    .water-filter-page .logo-text {
        font-size: 1.5rem !important; /* Smaller logo */
    }
    
    /* Mobile-specific utility classes */
    .water-filter-page .mobile-hidden {
        display: none !important;
    }
    
    .water-filter-page .mobile-visible {
        display: block !important;
    }
    
    .water-filter-page .mobile-text-center {
        text-align: center !important;
    }
    
    .water-filter-page .mobile-full-width {
        width: 100% !important;
    }
}

/* EXTRA SMALL SCREENS OPTIMIZATION */
@media (max-width: 480px) {
    .water-filter-page .hero-section {
        min-height: 60vh !important;
        height: 60vh !important;
        padding-top: 50px;
    }
    
    .water-filter-page .hero-section h1 {
        font-size: 24px !important; /* Smaller for very small screens */
    }
    
    .water-filter-page .section-title {
        font-size: 20px !important;
    }
    
    .water-filter-page .cta-title {
        font-size: 20px !important;
    }
    
    .water-filter-page .integrated-filter-section,
    .water-filter-page .green-section,
    .water-filter-page .cta-section {
        padding: 32px 0 !important; /* Even more compact */
    }
    
    .water-filter-page .container {
        padding: 0 12px !important;
    }
    
    .water-filter-page .hero-content {
        padding: 12px !important;
    }
    
    .water-filter-page .content-text,
    .water-filter-page .text-column {
        padding: 0 12px !important;
    }
    
    .water-filter-page .water-drop-icon {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
        margin-bottom: 12px !important;
    }
    
    .water-filter-page .filter-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .water-filter-page .tab-btn {
        padding: 8px 12px !important;
        font-size: 13px !important;
    }
    
    .water-filter-page .btn-glass,
    .water-filter-page .btn-outline,
    .water-filter-page .btn-primary {
        padding: 10px 20px !important;
        font-size: 13px !important;
    }
    
    .water-filter-page .feature-list span,
    .water-filter-page .section-description,
    .water-filter-page .hero-description,
    .water-filter-page .tab-content,
    .water-filter-page .benefit p {
        font-size: 13px !important;
    }
    
    .water-filter-page .dual-content,
    .water-filter-page .triple-content,
    .water-filter-page .cta-benefits {
        gap: 16px !important;
    }
    
    .water-filter-page .benefit {
        padding: 12px !important;
    }
    
    .water-filter-page .footer-content {
        gap: 20px !important;
    }
}

/* MOBILE PERFORMANCE OPTIMIZATIONS */
@media (max-width: 768px) {
    /* Reduced motion for better performance */
    @media (prefers-reduced-motion: reduce) {
        .water-filter-page * {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
        }
    }
    
    /* Optimize images for mobile */
    .water-filter-page img {
        max-width: 100%;
        height: auto;
        image-rendering: -webkit-optimize-contrast;
    }
    
    /* Better text rendering */
    .water-filter-page {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    
    /* Mobile typography scale */
    .water-filter-page h1 { font-size: 24px !important; }
    .water-filter-page h2 { font-size: 20px !important; }
    .water-filter-page h3 { font-size: 18px !important; }
    .water-filter-page h4 { font-size: 16px !important; }
    .water-filter-page h5 { font-size: 14px !important; }
    .water-filter-page h6 { font-size: 12px !important; }
    
    /* Touch-friendly elements */
    .water-filter-page .btn-glass,
    .water-filter-page .btn-outline,
    .water-filter-page .btn-primary,
    .water-filter-page .tab-btn,
    .water-filter-page .social-link {
        min-height: 44px !important;
        min-width: 44px !important;
    }
    
    /* Optimize text for mobile reading */
    .water-filter-page .hero-description,
    .water-filter-page .section-description,
    .water-filter-page .feature-list span,
    .water-filter-page .tab-content {
        word-wrap: break-word;
        overflow-wrap: break-word;
        hyphens: auto;
    }
}