/* ==========================================================================
   CÔNG TY TNHH CƯƠNG THỦY PHÁT (MST 3603493840) - STYLESHEET 2.0
   Design: Trusted Agricultural & Veterinary, Royal Purple & Accent Crimson
   Mobile Optimized for Rural Farmers & Dealers
   ========================================================================== */

:root {
    /* Brand Palette */
    --brand-purple: #4a1584;   /* Cuongthuy Deep Purple */
    --brand-red: #dc2626;      /* Cuongthuy Accent Red */
    --primary: #4a1584;         
    --primary-dark: #2e1065;
    --primary-light: #f3e8ff;
    --secondary: #dc2626;       
    --secondary-dark: #b91c1c;
    --accent: #f59e0b;          
    --accent-hover: #d97706;
    --danger: #ef4444;          
    --danger-light: #fee2e2;

    /* Neutrals */
    --dark: #0f172a;
    --text-main: #334155;
    --text-muted: #64748b;
    --bg-light: #f8fafc;
    --white: #ffffff;

    /* Spacing & Borders */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 10px 25px -5px rgba(74, 21, 132, 0.12), 0 8px 10px -6px rgba(0,0,0,0.04);
    --shadow-lg: 0 20px 35px -10px rgba(15, 23, 42, 0.15);
    --shadow-glow: 0 0 20px rgba(74, 21, 132, 0.4);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-family: 'Be Vietnam Pro', sans-serif;
    color: var(--text-main);
    background-color: #ffffff;
    line-height: 1.6;
}

body {
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

/* Utility Classes */
.gradient-text {
    background: linear-gradient(135deg, var(--brand-purple) 0%, var(--brand-red) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-center { text-align: center; }
.text-white { color: var(--white) !important; }
.text-light { color: #cbd5e1 !important; }
.margin-top-lg { margin-top: 40px; }
.margin-top-md { margin-top: 20px; }

/* Buttons & Badges */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
    color: var(--white);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(220, 38, 38, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--dark);
    border: 2px solid #cbd5e1;
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(74, 21, 132, 0.05);
}

.btn-pulse {
    animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
    0% { box-shadow: 0 0 0 0 rgba(74, 21, 132, 0.5); }
    70% { box-shadow: 0 0 0 14px rgba(74, 21, 132, 0); }
    100% { box-shadow: 0 0 0 0 rgba(74, 21, 132, 0); }
}

.btn-lg { padding: 16px 36px; font-size: 1.1rem; }
.btn-sm { padding: 10px 20px; font-size: 0.9rem; }
.btn-block { width: 100%; }

.badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 8px 18px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.badge-pill.light {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

.section-tag {
    display: inline-block;
    color: var(--primary);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-size: 0.85rem;
    margin-bottom: 10px;
}

.section-tag.light-tag { color: #a7f3d0; }
.section-tag.success-tag { color: var(--primary); }

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--dark);
    line-height: 1.3;
    margin-bottom: 12px;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 750px;
    margin: 0 auto;
}

.section { padding: 80px 0; }

/* --------------------------------------------------------------------------
   TOP BAR & SLOGAN
   -------------------------------------------------------------------------- */
.top-bar {
    background: #2e1065;
    color: #e9d5ff;
    font-size: 0.85rem;
    padding: 10px 0;
    border-bottom: 3px solid var(--brand-red);
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.top-slogan-wrap {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.brand-slogan-top {
    font-weight: 800;
    font-size: 0.95rem;
    color: var(--accent);
    text-transform: uppercase;
}

.slogan-desc-top {
    font-size: 0.82rem;
    color: #cbd5e1;
    line-height: 1.4;
}

.slogan-desc-top strong { color: #ffffff; }

.top-contact {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.top-contact a {
    color: var(--white);
    font-weight: 700;
    font-size: 0.9rem;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.top-contact a:hover, .top-contact a.phone-highlight {
    background: var(--brand-red);
    color: var(--white);
}

/* --------------------------------------------------------------------------
   HEADER & NAVBAR
   -------------------------------------------------------------------------- */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid #e2e8f0;
    padding: 12px 0;
}

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

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

.logo-img {
    height: 52px;
    width: auto;
    object-fit: contain;
    border-radius: 6px;
    background: #ffffff;
    padding: 3px 6px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

.brand-name {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--dark);
    line-height: 1;
    display: block;
}

.brand-name.white { color: var(--white); }
.brand-name .highlight { color: var(--primary); }

.brand-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
}

.white-sub { color: #cbd5e1; }

.nav-menu {
    display: flex;
    gap: 22px;
}

.nav-menu a {
    font-weight: 600;
    color: var(--dark);
    font-size: 0.92rem;
}

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

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.6rem;
    color: var(--dark);
    cursor: pointer;
}

/* --------------------------------------------------------------------------
   HERO SECTION
   -------------------------------------------------------------------------- */
.hero {
    background: radial-gradient(circle at top right, rgba(74, 21, 132, 0.08), transparent 50%),
                radial-gradient(circle at bottom left, rgba(220, 38, 38, 0.05), transparent 50%);
    padding: 70px 0 90px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 50px;
    align-items: center;
}

.hero-text h1 {
    font-size: 2.6rem;
    font-weight: 800;
    line-height: 1.25;
    color: var(--dark);
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 32px;
}

.feat-item {
    font-weight: 600;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
}

.feat-item i {
    color: var(--primary);
    font-size: 1.1rem;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    gap: 30px;
    border-top: 1px solid #e2e8f0;
    padding-top: 24px;
}

.stat-num {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-dark);
}

.stat-lbl {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
}

.hero-image-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.hero-img {
    border-radius: var(--radius-lg);
    width: 100%;
    object-fit: cover;
    border: 4px solid var(--white);
}

.floating-badge {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 14px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 14px;
    border: 1px solid rgba(255, 255, 255, 0.8);
    animation: floatAnim 4s ease-in-out infinite alternate;
}

.floating-badge i { font-size: 1.5rem; color: var(--primary); }
.floating-badge.badge-1 { top: -20px; right: -15px; }
.floating-badge.badge-2 { bottom: -20px; left: -15px; animation-delay: 2s; }
.floating-badge strong { display: block; font-size: 0.95rem; color: var(--dark); }
.floating-badge small { color: var(--text-muted); font-size: 0.8rem; }

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

/* --------------------------------------------------------------------------
   AUDIENCE BAR
   -------------------------------------------------------------------------- */
.audience-bar {
    background: var(--dark);
    color: var(--white);
    padding: 50px 0;
}

.audience-title {
    text-align: center;
    font-size: 1.15rem;
    margin-bottom: 30px;
    color: #cbd5e1;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.aud-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    transition: var(--transition);
}

.aud-card:hover {
    background: rgba(74, 21, 132, 0.3);
    border-color: var(--primary-light);
    transform: translateY(-5px);
}

.aud-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 16px;
    background: rgba(74, 21, 132, 0.3);
    color: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.aud-card h4 {
    font-size: 1.05rem;
    margin-bottom: 8px;
    color: var(--white);
}

.aud-card p {
    font-size: 0.85rem;
    color: #94a3b8;
}

/* --------------------------------------------------------------------------
   ABOUT US SECTION
   -------------------------------------------------------------------------- */
.about-section { background: var(--bg-light); }

.about-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 50px;
    align-items: center;
    margin-top: 40px;
}

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

.about-badge {
    position: absolute;
    bottom: -20px;
    left: 20px;
    right: 20px;
    background: var(--primary-dark);
    color: var(--white);
    padding: 16px;
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 700;
    box-shadow: var(--shadow-md);
    font-size: 0.9rem;
}

.about-text h3 { font-size: 1.5rem; color: var(--dark); margin-bottom: 16px; }
.about-text p { font-size: 1rem; color: var(--text-muted); margin-bottom: 24px; }

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

.afl-item {
    display: flex;
    gap: 16px;
}

.afl-item i {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.afl-item strong { display: block; font-size: 1.05rem; color: var(--dark); margin-bottom: 4px; }
.afl-item p { font-size: 0.88rem; margin-bottom: 0; }

/* --------------------------------------------------------------------------
   COLD CHAIN SECTION (2-8°C)
   -------------------------------------------------------------------------- */
.cold-section {
    background: linear-gradient(135deg, #1e1b4b 0%, #0f172a 100%);
    color: var(--white);
}

.cold-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 50px;
    align-items: center;
    margin-top: 40px;
}

.cold-info-box { position: relative; }
.cold-img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); width: 100%; }

.cold-status-bar {
    position: absolute;
    bottom: -20px;
    left: 20px;
    right: 20px;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid var(--primary);
    padding: 14px 20px;
    border-radius: var(--radius-md);
    display: flex;
    justify-content: space-around;
    font-size: 0.85rem;
}

.cs-item i { color: #a7f3d0; margin-right: 6px; }

.cold-process-list h3 { font-size: 1.4rem; margin-bottom: 24px; color: var(--white); }

.process-step {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.step-num {
    width: 42px;
    height: 42px;
    flex-shrink: 0;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
}

.step-content h4 { font-size: 1.1rem; color: #a7f3d0; margin-bottom: 4px; }
.step-content p { font-size: 0.9rem; color: #cbd5e1; }

/* --------------------------------------------------------------------------
   PRODUCTS SECTION & TABS (500+ SKU)
   -------------------------------------------------------------------------- */
.products-section { background: var(--white); }

.category-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin: 40px 0;
}

.tab-btn {
    padding: 10px 20px;
    background: #f1f5f9;
    color: var(--text-main);
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.product-card {
    background: var(--white);
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-md);
    padding: 28px;
    position: relative;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.product-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
    border-color: var(--primary);
}

.prod-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: #e0f2fe;
    color: #0369a1;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
}

.prod-badge.badge-hot { background: #fee2e2; color: #b91c1c; }
.prod-badge.badge-safe { background: #dcfce7; color: #15803d; }

.prod-icon-box {
    width: 52px;
    height: 52px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 16px;
}

.prod-cat-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
}

.product-card h3 {
    font-size: 1.15rem;
    color: var(--dark);
    margin: 6px 0 10px;
}

.product-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    flex-grow: 1;
}

.prod-specs {
    font-size: 0.85rem;
    color: var(--text-main);
    margin-bottom: 20px;
    border-top: 1px dashed #e2e8f0;
    padding-top: 12px;
}

.prod-specs li { margin-bottom: 4px; }
.prod-specs i { color: var(--primary); margin-right: 6px; }

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

.price-call {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary-dark);
}

.catalog-note { font-size: 1rem; color: var(--text-muted); margin-bottom: 16px; }

/* --------------------------------------------------------------------------
   COVERAGE AREA SECTION
   -------------------------------------------------------------------------- */
.coverage-section { background: var(--bg-light); }

.coverage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 40px;
}

.cov-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border-top: 4px solid #94a3b8;
    position: relative;
    transition: var(--transition);
}

.cov-card.highlight-cov {
    border-top-color: var(--primary);
    box-shadow: var(--shadow-md);
}

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

.cov-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 16px;
}

.cov-card h3 { font-size: 1.2rem; color: var(--dark); margin-bottom: 10px; }
.cov-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 20px; }

.cov-badge {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: var(--radius-full);
}

/* --------------------------------------------------------------------------
   KNOWLEDGE SECTION (Heo, Bò, Dê, Thỏ, Thú Cưng)
   -------------------------------------------------------------------------- */
.knowledge-section { background: var(--white); }

.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 40px;
}

.know-card {
    background: var(--bg-light);
    padding: 30px;
    border-radius: var(--radius-md);
    border-top: 4px solid var(--primary);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

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

.know-tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 800;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    margin-bottom: 14px;
    align-self: flex-start;
}

.know-card h3 { font-size: 1.15rem; color: var(--dark); margin-bottom: 10px; line-height: 1.35; }
.know-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 20px; flex-grow: 1; }
.know-link { font-size: 0.9rem; font-weight: 700; color: var(--primary); display: flex; align-items: center; gap: 6px; }

/* --------------------------------------------------------------------------
   CONTACT & FORM SECTION
   -------------------------------------------------------------------------- */
.contact-section {
    background: linear-gradient(135deg, #2e1065 0%, #0f172a 100%);
    color: var(--white);
}

.cta-box-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 50px;
    align-items: center;
}

.cta-info h2 { font-size: 2.2rem; margin-bottom: 16px; color: var(--white); }
.cta-info p { font-size: 1.05rem; color: #a7f3d0; margin-bottom: 28px; }

.contact-detail-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 30px;
}

.cdl-item {
    display: flex;
    gap: 14px;
    font-size: 0.95rem;
    color: #e2e8f0;
}

.cdl-item i { color: var(--accent); font-size: 1.2rem; margin-top: 3px; }

.direct-contact-box {
    background: rgba(255,255,255,0.08);
    padding: 20px;
    border-radius: var(--radius-md);
}

.direct-contact-box p { font-size: 0.9rem; color: #94a3b8; margin-bottom: 8px; }

.phone-link {
    display: inline-block;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--accent);
    margin-right: 16px;
}

.cta-form-wrapper {
    background: var(--white);
    color: var(--text-main);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.lead-form h3 {
    font-size: 1.4rem;
    color: var(--dark);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-control { margin-bottom: 18px; }
.form-control label { display: block; font-size: 0.9rem; font-weight: 700; color: var(--dark); margin-bottom: 6px; }

.form-control input, .form-control select, .form-control textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.95rem;
}

.form-control input:focus, .form-control select:focus, .form-control textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(74, 21, 132, 0.15);
}

.privacy-note { display: block; text-align: center; font-size: 0.78rem; color: var(--text-muted); margin-top: 14px; }

/* --------------------------------------------------------------------------
   FOOTER
   -------------------------------------------------------------------------- */
.footer { background: var(--dark); color: #94a3b8; padding-top: 70px; }

.footer-content {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.logo-footer-wrap { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.footer-logo-img { height: 52px; width: auto; background: #fff; padding: 4px 8px; border-radius: 8px; }

.footer-desc { font-size: 0.88rem; margin: 16px 0; color: #94a3b8; line-height: 1.5; }

.social-links { display: flex; gap: 12px; }
.social-links a {
    width: 38px;
    height: 38px;
    background: rgba(255,255,255,0.08);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-links a:hover { background: var(--primary); }

.footer-col h4 { color: var(--white); font-size: 1.1rem; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 0.9rem; }
.footer-col ul li a:hover { color: var(--primary-light); }
.footer-col p { font-size: 0.88rem; margin-bottom: 10px; }

.footer-bottom { padding: 24px 0; font-size: 0.85rem; color: #64748b; }

/* --------------------------------------------------------------------------
   FLOATING BUTTONS & TOAST
   -------------------------------------------------------------------------- */
.floating-contact {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.float-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    position: relative;
    transition: var(--transition);
}

.float-zalo { background: #0088fe; animation: pulse-zalo 2s infinite; }
.float-phone { background: var(--primary); animation: pulse-phone 2s infinite; }
.float-btn:hover { transform: scale(1.1); }

.float-tooltip {
    position: absolute;
    right: 68px;
    background: var(--dark);
    color: var(--white);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.float-btn:hover .float-tooltip { opacity: 1; }

.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--dark);
    color: var(--white);
    padding: 16px 28px;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 2000;
    opacity: 0;
    transition: all 0.4s ease;
    border: 1px solid var(--primary-light);
}

.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
.toast-icon { color: #a7f3d0; font-size: 1.3rem; }

/* --------------------------------------------------------------------------
   RESPONSIVE MEDIA QUERIES (TỐI ƯU CHO ĐIỆN THOẠI NÔNG THÔN)
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
    .hero-grid, .about-grid, .cold-grid, .cta-box-grid { grid-template-columns: 1fr; gap: 40px; }
    .audience-grid, .problems-grid, .benefits-grid, .products-grid, .coverage-grid, .knowledge-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-content { grid-template-columns: repeat(2, 1fr); }
    .nav-menu { display: none; }
    .mobile-toggle { display: block; }
}

@media (max-width: 640px) {
    .hero-text h1 { font-size: 1.9rem; }
    .audience-grid, .problems-grid, .benefits-grid, .products-grid, .coverage-grid, .knowledge-grid, .footer-content { grid-template-columns: 1fr; }
    .hero-stats { flex-direction: column; gap: 15px; }
    .floating-badge { display: none; }
    .top-bar-content { flex-direction: column; gap: 10px; text-align: center; }
    .btn-lg { width: 100%; padding: 14px 20px; font-size: 1rem; }
}

/* STICKY BOTTOM BAR FOR MOBILE DEPLOYMENT */
.mobile-sticky-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    background: #ffffff;
    box-shadow: 0 -4px 15px rgba(0,0,0,0.15);
    padding: 8px 12px;
    gap: 8px;
}

.msb-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px 10px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
    color: #ffffff;
    text-align: center;
}

.msb-call {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.msb-zalo {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
}

@media (max-width: 768px) {
    .mobile-sticky-bar {
        display: flex;
    }
    body {
        padding-bottom: 60px;
    }
    .floating-contact {
        bottom: 75px;
    }
}