/* Design System — Professional */
:root {
    --primary: #1e3a5f;
    --primary-hover: #152a45;
    --primary-brand: #2563eb;
    --primary-light: #eff6ff;
    --primary-glow: rgba(37, 99, 235, 0.12);
    
    --accent: #c2410c;
    --accent-hover: #9a3412;
    --accent-light: #fff7ed;
    
    --success: #059669;
    --success-light: #ecfdf5;
    
    --text-main: #1e293b;
    --text-muted: #64748b;
    --text-subtle: #94a3b8;
    --text-white: #ffffff;
    
    --bg-main: #ffffff;
    --bg-light: #f8fafc;
    --bg-muted: #f1f5f9;
    --bg-dark: #0f172a;
    --bg-navy: #0c1929;
    
    --border-color: #e2e8f0;
    --border-subtle: #f1f5f9;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-title: 'Plus Jakarta Sans', 'Inter', sans-serif;
    
    --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.1);
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    
    --transition: 0.2s ease;
    --section-py: 48px;
    --section-header-mb: 28px;
}

/* Base resets & styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography styles */
h1, h2, h3, h4 {
    font-family: var(--font-title);
    font-weight: 700;
    color: var(--bg-dark);
    line-height: 1.25;
}

h1 {
    font-size: clamp(2rem, 4vw, 2.875rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.625rem, 3vw, 2.125rem);
    letter-spacing: -0.02em;
}

p {
    font-size: 1rem;
}

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

/* Button system */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-title);
    font-weight: 600;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--text-white);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--bg-main);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
    background-color: var(--bg-light);
    border-color: #cbd5e1;
    color: var(--primary);
}

.btn-phone {
    background-color: var(--accent);
    color: var(--text-white);
    font-weight: 600;
}

.btn-phone:hover {
    background-color: var(--accent-hover);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
    border-radius: var(--radius-md);
}

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

.hidden {
    display: none !important;
}

/* Header & Navigation */
.main-header {
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 14px 0;
    transition: var(--transition);
}

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

.logo a {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--bg-dark);
}

.logo-wrap {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.logo-text {
    font-family: var(--font-title);
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.01em;
}

.logo-tagline {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--primary);
    color: var(--text-white);
    border-radius: var(--radius-md);
    font-size: 1rem;
}

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

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 6px;
    align-items: center;
}

.main-nav a {
    font-weight: 500;
    color: var(--text-muted);
    font-size: 0.875rem;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    display: block;
}

.main-nav a:hover {
    color: var(--text-main);
    background-color: var(--bg-muted);
}

.header-search {
    margin: 0 16px;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 8px;
    width: 220px;
    position: relative;
    transition: var(--transition);
}

.search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
    background-color: var(--bg-main);
}

.search-box i {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

.search-box input {
    border: none;
    background: transparent;
    width: 100%;
    outline: none;
    font-size: 0.8125rem;
    color: var(--text-main);
}

.search-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    max-height: 280px;
    overflow-y: auto;
    z-index: 150;
}

.search-result-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-main);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.search-result-item:hover,
.search-result-item:focus {
    background-color: var(--primary-light);
    color: var(--primary);
    outline: none;
}

.search-result-item i {
    color: var(--accent);
    font-size: 0.75rem;
}

.search-no-result {
    padding: 12px 14px;
    font-size: 0.8125rem;
    color: var(--text-muted);
    text-align: center;
}

.search-key {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    background-color: var(--border-color);
    color: var(--text-muted);
    padding: 2px 4px;
    border-radius: 4px;
    font-weight: 600;
}

.btn-phone-header {
    background-color: var(--accent);
    color: var(--text-white);
    font-family: var(--font-title);
    font-weight: 600;
    font-size: 0.875rem;
    padding: 10px 18px;
    border-radius: var(--radius-md);
}

.btn-phone-header:hover {
    background-color: var(--accent-hover);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--bg-dark);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 320px;
    height: 100vh;
    background-color: var(--bg-main);
    z-index: 200;
    box-shadow: var(--shadow-lg);
    padding: 40px 24px;
    display: flex;
    flex-direction: column;
    gap: 40px;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu-overlay.active {
    right: 0;
}

.mobile-menu-close {
    align-self: flex-end;
    background: none;
    border: none;
    font-size: 1.75rem;
    cursor: pointer;
    color: var(--text-muted);
}

.mobile-nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.mobile-nav-links a {
    font-family: var(--font-title);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--bg-dark);
    display: block;
}

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

/* Trust strip */
.trust-strip {
    background-color: var(--bg-muted);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
}

.trust-strip-container {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px 0;
}

.trust-strip-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-muted);
    padding: 0 16px;
}

.trust-strip-item i {
    color: var(--primary-brand);
    font-size: 0.75rem;
}

.trust-strip-divider {
    width: 1px;
    height: 14px;
    background-color: var(--border-color);
}

/* Hero Section */
.hero-section {
    position: relative;
    padding: 40px 0 48px;
    background: linear-gradient(180deg, var(--bg-main) 0%, var(--bg-light) 100%);
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -120px;
    right: -80px;
    width: 480px;
    height: 480px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    pointer-events: none;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 36px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--primary-brand);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.hero-title {
    font-size: clamp(2.125rem, 4.5vw, 3rem);
    font-weight: 800;
    line-height: 1.12;
    color: var(--bg-dark);
    margin-bottom: 20px;
    letter-spacing: -0.03em;
}

.hero-title .text-highlight {
    color: var(--primary-brand);
}

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

.hero-subtitle {
    font-size: 1.0625rem;
    color: var(--text-muted);
    margin-bottom: 24px;
    max-width: 520px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.btn-phone-hero {
    background-color: var(--accent);
    color: var(--text-white);
}

.btn-phone-hero:hover {
    background-color: var(--accent-hover);
}

.btn-zalo-hero {
    background-color: var(--bg-main) !important;
    color: var(--text-main) !important;
    border: 1px solid var(--border-color) !important;
}

.btn-zalo-hero:hover {
    background-color: var(--bg-muted) !important;
    border-color: #cbd5e1 !important;
    color: var(--primary) !important;
}

.hero-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background-color: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    max-width: 480px;
}

.hero-metric {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 16px 20px;
    background-color: var(--bg-main);
}

.hero-metric-value {
    font-family: var(--font-title);
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--bg-dark);
    letter-spacing: -0.02em;
}

.hero-metric-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.icon-orange {
    color: var(--accent);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: stretch;
}

.hero-figure {
    width: 100%;
    max-width: 480px;
    margin: 0;
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    background: var(--bg-main);
}

.hero-image {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.hero-image-caption {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 20px;
    padding: 12px 16px;
    background: var(--bg-muted);
    border-top: 1px solid var(--border-color);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-muted);
}

.hero-image-caption span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.hero-image-caption i {
    color: var(--primary-brand);
    font-size: 0.75rem;
}


/* Common Section Header */
.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--section-header-mb);
}

.section-tag {
    display: inline-block;
    color: var(--primary-brand);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
}

.section-title {
    margin-bottom: 14px;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.7;
}

/* Problems Section (PAS Model) */
.problems-section {
    padding: var(--section-py) 0;
    background-color: var(--bg-main);
}

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

.problem-card {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px 22px;
    transition: var(--transition);
}

.problem-card:hover {
    border-color: #cbd5e1;
    box-shadow: var(--shadow-md);
}

.problem-icon {
    width: 48px;
    height: 48px;
    background-color: var(--bg-muted);
    color: var(--text-muted);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 20px;
}

.problem-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.problem-card p {
    color: var(--text-muted);
    font-size: 0.9375rem;
    line-height: 1.65;
}

/* Services Section */
.services-section {
    padding: var(--section-py) 0;
    background-color: var(--bg-light);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.service-card {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.service-card:hover {
    box-shadow: var(--shadow-md);
    border-color: #cbd5e1;
}

.service-card-img {
    display: block;
    width: 100%;
    height: 148px;
    object-fit: cover;
}

.service-card-body {
    padding: 18px 20px 22px;
}

.service-card h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.service-card h3 i {
    color: var(--primary-brand);
    font-size: 0.9375rem;
}

.service-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.service-card li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.9375rem;
    color: var(--text-main);
    font-weight: 500;
}

.service-card li i {
    color: var(--text-subtle);
    margin-top: 4px;
    font-size: 0.625rem;
}

/* Benefits Section */
.benefits-section {
    padding: var(--section-py) 0;
    background-color: var(--bg-main);
}

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

.benefit-item {
    display: flex;
    gap: 16px;
    background-color: var(--bg-main);
    padding: 22px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.benefit-item:hover {
    box-shadow: var(--shadow-sm);
}

.benefit-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    background-color: var(--bg-muted);
    color: var(--primary-brand);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
}

.benefit-content h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.benefit-content p {
    color: var(--text-muted);
    font-size: 0.9375rem;
}

/* Pricing Section */
.pricing-section {
    padding: var(--section-py) 0;
    background-color: var(--bg-light);
}

.pricing-table-container {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    margin-bottom: 24px;
}

.pricing-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.pricing-table th, .pricing-table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-color);
}

.pricing-table th {
    background-color: var(--bg-navy);
    color: var(--text-white);
    font-family: var(--font-title);
    font-weight: 600;
    font-size: 0.875rem;
    letter-spacing: 0.02em;
}

.pricing-table tr:last-child td {
    border-bottom: none;
}

.pricing-table tr:hover td {
    background-color: var(--bg-light);
}

.pricing-table td {
    font-weight: 500;
}

.icon-table {
    color: var(--text-subtle);
    margin-right: 8px;
    font-size: 0.9375rem;
}

.pricing-table .price {
    color: var(--primary-brand);
    font-weight: 700;
    font-family: var(--font-title);
}

.pricing-note {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Testimonials Section */
.testimonials-section {
    padding: var(--section-py) 0;
    background-color: var(--bg-main);
    border-top: 1px solid var(--border-subtle);
}

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

.testimonial-card {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.testimonial-card .stars {
    color: #d97706;
    margin-bottom: 16px;
    font-size: 0.875rem;
}

.feedback-text {
    color: var(--text-main);
    font-size: 0.9375rem;
    line-height: 1.75;
    margin-bottom: 24px;
}

.customer-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.avatar-letter {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-title);
    font-weight: 700;
    font-size: 1.25rem;
    box-shadow: 0 4px 10px rgba(15, 23, 42, 0.05);
}

.avatar-letter.text-blue {
    background-color: var(--primary-light);
    color: var(--primary);
}

.avatar-letter.text-orange {
    background-color: var(--accent-light);
    color: var(--accent);
}

.customer-info h4 {
    font-size: 1rem;
}

.customer-info p {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* FAQ Section */
.faq-section {
    padding: var(--section-py) 0;
    background-color: var(--bg-light);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: #cbd5e1;
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    text-align: left;
    font-family: var(--font-title);
    font-weight: 600;
    font-size: 1rem;
    color: var(--bg-dark);
}

.faq-arrow {
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: transform 0.3s ease;
}

.faq-answer {
    padding: 0 24px 24px;
    display: none;
}

.faq-answer p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.faq-item.active .faq-arrow {
    transform: rotate(180deg);
    color: var(--primary-brand);
}

.faq-item.active .faq-answer {
    display: block;
}

/* Contact & Form Section */
.contact-section {
    padding: var(--section-py) 0;
    background-color: var(--bg-navy);
    color: var(--text-white);
    position: relative;
    overflow: hidden;
}

.contact-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 32px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.contact-info h2 {
    color: var(--text-white);
    font-size: 2.25rem;
    margin-bottom: 20px;
}

.contact-desc {
    color: #94a3b8;
    font-size: 1rem;
    margin-bottom: 20px;
}

.contact-image-wrap {
    margin-bottom: 24px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-image-wrap img {
    display: block;
    width: 100%;
    height: auto;
    max-height: 200px;
    object-fit: cover;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

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

.contact-detail-item .icon-box {
    width: 48px;
    height: 48px;
    background-color: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    color: #93c5fd;
}

.contact-detail-item span {
    display: block;
    font-size: 0.8125rem;
    color: #94a3b8;
}

.contact-detail-item .phone-link {
    font-family: var(--font-title);
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-white);
}

.contact-detail-item .phone-link:hover {
    color: #93c5fd;
}

.discount-badge {
    display: flex;
    align-items: center;
    gap: 20px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 20px;
}

.badge-percent {
    font-family: var(--font-title);
    font-size: 1.75rem;
    font-weight: 700;
    color: #fbbf24;
    line-height: 1;
}

.discount-badge h4 {
    color: var(--text-white);
    font-size: 1.05rem;
    margin-bottom: 4px;
}

.discount-badge p {
    color: #cbd5e1;
    font-size: 0.8125rem;
}

/* Contact Form Card */
.contact-form-card {
    background-color: var(--bg-main);
    color: var(--text-main);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    padding: 36px;
}

.contact-form-card h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
    text-align: center;
}

.contact-form-card p {
    color: var(--text-muted);
    font-size: 0.875rem;
    text-align: center;
    margin-bottom: 32px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.form-group label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--bg-dark);
}

.form-group .required {
    color: var(--accent);
}

.form-group input, .form-group select {
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    transition: var(--transition);
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary-brand);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.btn-spinner {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* Footer */
.main-footer {
    background-color: var(--bg-dark);
    color: var(--text-subtle);
    padding: 32px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    text-align: center;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 0.875rem;
}

.footer-bottom strong {
    color: var(--text-white);
}

/* Floating Actions */
.floating-actions {
    position: fixed;
    bottom: 32px;
    right: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    z-index: 90;
}

.btn-float {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    position: relative;
    cursor: pointer;
    transition: var(--transition);
}

.btn-float:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.btn-float-phone {
    background-color: var(--accent);
}

.btn-float-zalo {
    background-color: var(--primary-brand);
}

.pulse-ring {
    display: none;
}

/* Toast System */
.toast-container {
    position: fixed;
    top: 32px;
    right: 32px;
    z-index: 150;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background-color: var(--bg-dark);
    color: var(--text-white);
    padding: 16px 24px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    font-size: 0.9375rem;
    animation: slideInRight 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.toast-success {
    border-left: 4px solid var(--success);
}

.toast i {
    color: var(--success);
    font-size: 1.125rem;
}

/* Modal Popup Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background-color: var(--bg-main);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 48px 40px;
    max-width: 500px;
    width: 90%;
    text-align: center;
    transform: translateY(20px);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.success-icon {
    width: 72px;
    height: 72px;
    background-color: var(--success-light);
    color: var(--success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 24px;
}

.modal-content h2 {
    font-size: 1.75rem;
    margin-bottom: 16px;
}

.modal-content p {
    color: var(--text-muted);
    font-size: 0.9375rem;
    margin-bottom: 32px;
    line-height: 1.7;
}

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

@keyframes dotPulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5);
    }
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
    }
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

@keyframes ringPulse {
    0% {
        transform: scale(1);
        opacity: 0.8;
    }
    100% {
        transform: scale(1.6);
        opacity: 0;
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Hero USPs Styling */
.hero-usps-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
    background: rgba(2, 82, 163, 0.03);
    padding: 20px;
    border-radius: var(--radius-md);
    border: 1px dashed rgba(2, 82, 163, 0.2);
}

.hero-usp-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    text-align: left;
}

.hero-usp-item p {
    font-size: 0.9375rem;
    color: var(--text-main);
    line-height: 1.4;
}

.usp-badge {
    background-color: var(--accent-light);
    color: var(--accent);
    font-family: var(--font-title);
    font-weight: 700;
    font-size: 0.6875rem;
    padding: 3px 8px;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
    margin-top: 2px;
}

/* Service Areas Local SEO Section */
.service-areas-section {
    padding: var(--section-py) 0;
    background-color: var(--bg-main);
}

.areas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.area-card {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    position: relative;
    transition: var(--transition);
}

.area-card:hover {
    box-shadow: var(--shadow-md);
    border-color: #cbd5e1;
}

.area-badge {
    display: inline-block;
    background-color: var(--bg-muted);
    color: var(--text-muted);
    font-family: var(--font-title);
    font-weight: 700;
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 50px;
    margin-bottom: 16px;
}

.area-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.area-card p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.5;
}

.area-keywords {
    list-style: none;
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.area-keywords li {
    font-size: 0.8125rem;
    color: var(--text-main);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.area-keywords li i {
    color: var(--text-subtle);
    font-size: 0.6875rem;
}

/* Media Queries (Responsive) */
@media (max-width: 1024px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 32px;
    }
    
    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-features {
        justify-content: center;
    }
    
    .hero-rating {
        justify-content: center;
    }
    
    .hero-visual {
        height: auto;
        padding: 0;
    }
    
    .hero-buttons {
        justify-content: center;
    }

    .hero-metrics {
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }

    .hero-figure {
        max-width: 520px;
        margin: 0 auto;
    }
    
    .problems-grid, .services-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 28px;
    }
}

@media (max-width: 768px) {
    .main-nav, .header-cta, .header-search {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .problems-grid, .services-grid, .benefits-grid, .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-table th:nth-child(3), .pricing-table td:nth-child(3) {
        display: none; /* Hide warranty column on tiny mobile screens to fit page width */
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .trust-strip-divider {
        display: none;
    }

    .trust-strip-container {
        gap: 8px;
    }

    .trust-strip-item {
        padding: 0 8px;
        font-size: 0.75rem;
    }

    .hero-metrics {
        grid-template-columns: 1fr;
    }
    
    .contact-form-card {
        padding: 24px;
    }
    
    .floating-actions {
        bottom: 20px;
        right: 20px;
    }
}