/* ===== DESIGN TOKENS ===== */
:root {
    /* Brand — Fresh Green */
    --primary:        #059669;
    --primary-dark:   #047857;
    --primary-light:  #10B981;
    --primary-50:     #ECFDF5;
    --primary-100:    #D1FAE5;

    /* Accent — gold (đồng bộ common.css) */
    --accent:         #FBBF24;
    --accent-hover:   #F59E0B;
    --accent-light:   #FEF3C7;

    /* Neutrals */
    --bg:             #FFFFFF;
    --bg-alt:         #F8FAFC;
    --bg-dark:        #0D1B2A;
    --bg-card:        #FFFFFF;
    --surface:        #F1F5F9;

    /* Text */
    --text:           #0F172A;
    --text-secondary: #334155;
    --text-muted:     #64748B;
    --text-light:     #94A3B8;

    /* Semantic */
    --success:        #0284C7;
    --success-bg:     #E0F2FE;
    --warning:        #D97706;
    --warning-bg:     #FEF3C7;
    --border:         #E2E8F0;
    --border-focus:   var(--primary-light);

    /* Radius — rounder, friendlier */
    --r-xs:  10px;
    --r-sm:  14px;
    --r:     18px;
    --r-lg:  24px;
    --r-xl:  32px;
    --r-full: 999px;

    /* Shadow */
    --shadow-xs: 0 1px 3px rgba(15,23,42,.06), 0 1px 2px rgba(15,23,42,.04);
    --shadow-sm: 0 2px 8px rgba(15,23,42,.08), 0 1px 4px rgba(15,23,42,.04);
    --shadow:    0 4px 16px rgba(15,23,42,.10), 0 2px 6px rgba(15,23,42,.06);
    --shadow-lg: 0 10px 32px rgba(15,23,42,.12), 0 4px 12px rgba(15,23,42,.06);
    --shadow-xl: 0 20px 56px rgba(15,23,42,.14), 0 8px 20px rgba(15,23,42,.07);
    --shadow-blue: 0 4px 20px rgba(5,150,105,.22);
    --shadow-blue-lg: 0 8px 32px rgba(5,150,105,.3);

    /* Typography */
    --font: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Motion */
    --ease: cubic-bezier(.16,1,.3,1);
    --t-fast: .15s;
    --t: .25s;
    --t-slow: .4s;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; font-size: 16px; overflow-x: hidden; width: 100%; max-width: 100%; }
body { overflow-x: hidden; width: 100%; max-width: 100vw; position: relative; }
body {
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); font-size: inherit; }
input { font-family: var(--font); font-size: 1rem; }

/* ===== CONTAINER ===== */
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: var(--r-sm);
    font-weight: 600;
    font-size: .95rem;
    letter-spacing: -.01em;
    transition: all var(--t) var(--ease);
    white-space: nowrap;
    position: relative;
}
.btn-accent {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    color: #78350F;
    box-shadow: 0 2px 12px rgba(251,191,36,.4);
}
.btn-accent:hover {
    background: linear-gradient(135deg, var(--accent-hover), #D97706);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(251,191,36,.5);
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue-lg);
}
.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary-100);
}
.btn-outline:hover {
    background: var(--primary-50);
    border-color: var(--primary-light);
}
.btn-white {
    background: #fff;
    color: var(--primary);
    box-shadow: var(--shadow);
}
.btn-white:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; font-weight: 700; }
.btn-full { width: 100%; }

/* Offer buttons */
.btn-offer {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--primary-50);
    color: var(--primary);
    padding: 11px 24px;
    border-radius: var(--r-sm);
    font-weight: 600;
    font-size: .9rem;
    border: 1.5px solid var(--primary-100);
    transition: all var(--t) var(--ease);
    white-space: nowrap;
}
.btn-offer:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-blue);
}
.btn-offer-primary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--primary);
    color: #fff;
    padding: 13px 28px;
    border-radius: var(--r-sm);
    font-weight: 700;
    font-size: .95rem;
    box-shadow: var(--shadow-blue);
    transition: all var(--t) var(--ease);
    white-space: nowrap;
}
.btn-offer-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue-lg);
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: 900;
    border-bottom: 1px solid var(--border);
    transition: box-shadow var(--t) var(--ease);
}
.header.scrolled { box-shadow: var(--shadow-sm); }
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}
.logo { display: flex; align-items: center; gap: 9px; }
.logo-text { display: flex; align-items: baseline; gap: 1px; }
.logo-mark { flex-shrink: 0; }
.logo-on     { font-size: 1.45rem; font-weight: 900; color: var(--primary); letter-spacing: -.03em; }
.logo-credit { font-size: 1.45rem; font-weight: 900; color: var(--text); letter-spacing: -.03em; }
.logo-cz     { font-size: .8rem; font-weight: 600; color: var(--text-muted); margin-left: 1px; }
.nav { display: flex; gap: 4px; align-items: center; }
.nav a {
    padding: 7px 14px;
    border-radius: var(--r-xs);
    font-size: .88rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--t-fast) ease;
}
.nav a:hover { color: var(--primary); background: var(--primary-50); }
.header-cta { display: block; }
.burger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.burger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--t); }

/* ===== HERO ===== */
.hero {
    padding: 116px 0 72px;
    background: linear-gradient(150deg, #ECFDF5 0%, #F8FAFC 55%, #FEFCE8 100%);
    position: relative;
    overflow: hidden;
}
/* Hình tròn trang trí gây tràn ngang trên mobile — đã bỏ.
   (right:-120px + width:500px làm hero rộng hơn viewport → khoảng trắng phải) */
.hero::before, .hero::after { display: none; }
.hero-inner {
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: 64px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--primary-50);
    color: var(--primary);
    border: 1px solid var(--primary-100);
    padding: 6px 16px;
    border-radius: var(--r-full);
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .01em;
    margin-bottom: 20px;
}
.hero h1 {
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1.18;
    letter-spacing: -.03em;
    margin-bottom: 16px;
    color: var(--text);
}
.highlight {
    color: var(--primary);
    background: linear-gradient(135deg, #059669, #10B981);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 24px;
    max-width: 500px;
    line-height: 1.65;
}
.hero-pills { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: #fff;
    border: 1px solid var(--border);
    padding: 7px 14px;
    border-radius: var(--r-full);
    font-size: .82rem;
    font-weight: 500;
    color: var(--text-secondary);
    box-shadow: var(--shadow-xs);
}
.trust-row {
    display: flex;
    gap: 28px;
    margin-top: 32px;
    padding-top: 28px;
    border-top: 1px solid var(--border);
}
.trust-item { display: flex; flex-direction: column; gap: 2px; }
.trust-item strong { font-size: 1.25rem; font-weight: 800; color: var(--primary); letter-spacing: -.02em; }
.trust-item span { font-size: .78rem; color: var(--text-muted); font-weight: 500; }

/* ===== CALCULATOR CARD ===== */
.calculator-card {
    background: #fff;
    border-radius: var(--r-xl);
    padding: 32px 28px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border);
    position: relative;
}
.calculator-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: calc(var(--r-xl) + 1px);
    background: linear-gradient(135deg, rgba(5,150,105,.15), transparent 60%);
    z-index: -1;
}
.calculator-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text);
    letter-spacing: -.02em;
    display: flex;
    align-items: center;
    gap: 8px;
}
.calculator-card h3::before {
    content: '';
    display: block;
    width: 4px;
    height: 18px;
    background: var(--primary);
    border-radius: 2px;
}
.calc-field { margin-bottom: 22px; }
.calc-field label {
    font-size: .78rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .06em;
    display: block;
    margin-bottom: 6px;
}
.slider-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -.04em;
    margin-bottom: 12px;
    line-height: 1;
}
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: var(--r-full);
    background: var(--border);
    outline: none;
    cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--primary);
    border: 3px solid #fff;
    box-shadow: 0 0 0 1px var(--primary-light), 0 2px 8px rgba(5,150,105,.3);
    cursor: pointer;
    transition: transform var(--t-fast) ease, box-shadow var(--t-fast) ease;
}
input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 3px rgba(5,150,105,.15), 0 4px 12px rgba(5,150,105,.35);
}
input[type="range"]::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--primary);
    border: 3px solid #fff;
    box-shadow: 0 2px 8px rgba(5,150,105,.3);
    cursor: pointer;
}
.slider-range {
    display: flex;
    justify-content: space-between;
    font-size: .72rem;
    color: var(--text-light);
    margin-top: 6px;
    font-weight: 500;
}
.calc-results {
    background: var(--primary-50);
    border: 1px solid var(--primary-100);
    border-radius: var(--r);
    padding: 16px 18px;
    margin: 20px 0 16px;
}
.calc-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    font-size: .88rem;
}
.calc-row + .calc-row { border-top: 1px solid var(--primary-100); }
.calc-row span { color: var(--text-muted); font-weight: 500; }
.calc-row strong { color: var(--primary); font-weight: 700; font-size: .95rem; }
.calc-note {
    font-size: .75rem;
    color: var(--success);
    text-align: center;
    margin-bottom: 16px;
    font-weight: 600;
    line-height: 1.5;
}
.calc-note::before {
    content: '✓';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px; height: 16px;
    margin-right: 5px;
    border-radius: 50%;
    background: var(--success-bg);
    color: var(--success);
    font-size: .62rem;
    font-weight: 800;
    vertical-align: middle;
}

/* ===== STATS ===== */
.stats-section {
    padding: 0;
    margin-top: -44px;
    position: relative;
    z-index: 10;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.stat-card {
    background: #fff;
    border-radius: var(--r-lg);
    padding: 24px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: transform var(--t) var(--ease);
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.stat-num {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -.03em;
    line-height: 1.1;
}
.stat-label {
    font-size: .78rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-top: 4px;
    line-height: 1.3;
}

/* ===== SECTIONS ===== */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-alt); }
.section-title {
    text-align: center;
    font-size: 1.9rem;
    font-weight: 800;
    letter-spacing: -.03em;
    margin-bottom: 8px;
    color: var(--text);
}
.section-sub {
    text-align: center;
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 52px;
    font-weight: 400;
}

/* ===== HOW IT WORKS ===== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    position: relative;
}
.steps-grid::before {
    content: '';
    position: absolute;
    top: 32px;
    left: calc(12.5% + 16px);
    right: calc(12.5% + 16px);
    height: 2px;
    background: linear-gradient(90deg, var(--primary-100), var(--border), var(--primary-100));
    z-index: 0;
}
.step-card {
    background: #fff;
    border-radius: var(--r-lg);
    padding: 32px 20px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    position: relative;
    z-index: 1;
    transition: all var(--t) var(--ease);
}
.step-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--primary-100); }
.step-num {
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: .85rem;
    margin: 0 auto 14px;
    box-shadow: 0 0 0 4px var(--primary-50);
}
.step-icon { font-size: 2rem; margin-bottom: 12px; }
.step-card h4 { font-size: .95rem; font-weight: 700; margin-bottom: 6px; letter-spacing: -.01em; }
.step-card p { font-size: .83rem; color: var(--text-muted); line-height: 1.55; }

/* ===== BENEFITS ===== */
.benefits-grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 48px;
    align-items: start;
}
.benefits-list { display: flex; flex-direction: column; gap: 12px; }
.benefit-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 18px 20px;
    background: #fff;
    border-radius: var(--r);
    border: 1px solid var(--border);
    transition: all var(--t) var(--ease);
    box-shadow: var(--shadow-xs);
}
.benefit-item:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-sm);
    transform: translateX(3px);
}
.benefit-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-50);
    border-radius: var(--r-sm);
}
.benefit-item h4 { font-size: .9rem; font-weight: 700; margin-bottom: 3px; letter-spacing: -.01em; }
.benefit-item p { font-size: .82rem; color: var(--text-muted); line-height: 1.5; }
.visual-box {
    background: linear-gradient(150deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
    border-radius: var(--r-xl);
    padding: 36px 28px;
    display: flex;
    flex-direction: column;
    gap: 0;
    position: sticky;
    top: 88px;
    overflow: hidden;
}
.visual-box::before {
    content: '';
    position: absolute;
    top: -40px; right: -40px;
    width: 180px; height: 180px;
    background: rgba(255,255,255,.07);
    border-radius: 50%;
}
.visual-stat {
    text-align: center;
    padding: 24px 0;
    position: relative;
}
.visual-stat + .visual-stat {
    border-top: 1px solid rgba(255,255,255,.12);
}
.visual-num { display: block; font-size: 2.2rem; font-weight: 800; color: #fff; letter-spacing: -.04em; line-height: 1.1; }
.visual-label { display: block; font-size: .8rem; color: rgba(255,255,255,.65); margin-top: 5px; font-weight: 500; }

/* ===== CONDITIONS ===== */
.conditions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.condition-card {
    background: #fff;
    border-radius: var(--r-lg);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: all var(--t) var(--ease);
}
.condition-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-100); }
.condition-icon {
    font-size: 2rem;
    margin-bottom: 14px;
    width: 56px;
    height: 56px;
    background: var(--primary-50);
    border-radius: var(--r);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    margin-right: auto;
}
.condition-card h4 { font-size: .95rem; font-weight: 700; margin-bottom: 8px; letter-spacing: -.01em; }
.condition-card p { font-size: .83rem; color: var(--text-muted); line-height: 1.55; }

/* ===== REVIEWS ===== */
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.review-card {
    background: #fff;
    border-radius: var(--r-lg);
    padding: 28px 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: all var(--t) var(--ease);
    display: flex;
    flex-direction: column;
}
.review-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.review-stars {
    color: #F59E0B;
    font-size: 1rem;
    margin-bottom: 14px;
    letter-spacing: 3px;
}
.review-card > p {
    font-size: .88rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 20px;
    flex: 1;
    font-style: italic;
}
.review-author { display: flex; align-items: center; gap: 12px; }
.review-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: .88rem;
    flex-shrink: 0;
}
.review-author strong { display: block; font-size: .88rem; font-weight: 700; }
.review-author span { font-size: .75rem; color: var(--text-light); }

/* ===== FAQ ===== */
.faq-list { max-width: 700px; margin: 0 auto; display: flex; flex-direction: column; gap: 8px; }
.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--r);
    overflow: hidden;
    background: #fff;
    box-shadow: var(--shadow-xs);
    transition: border-color var(--t) ease, box-shadow var(--t) ease;
}
.faq-item.open {
    border-color: var(--primary-100);
    box-shadow: var(--shadow-sm);
}
.faq-q {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 22px;
    font-size: .92rem;
    font-weight: 600;
    color: var(--text);
    text-align: left;
    gap: 12px;
    transition: background var(--t-fast) ease;
}
.faq-q:hover { background: var(--primary-50); }
.faq-item.open .faq-q { color: var(--primary); background: var(--primary-50); }
.faq-arrow {
    font-size: 1rem;
    color: var(--text-muted);
    transition: transform var(--t-slow) var(--ease), color var(--t-fast) ease;
    flex-shrink: 0;
}
.faq-item.open .faq-arrow { transform: rotate(180deg); color: var(--primary); }
.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--t-slow) var(--ease), padding var(--t) ease;
    padding: 0 22px;
}
.faq-item.open .faq-a { max-height: 300px; padding: 0 22px 18px; }
.faq-a p { font-size: .88rem; color: var(--text-muted); line-height: 1.65; }

/* ===== CTA SECTION ===== */
.cta-section {
    background: linear-gradient(150deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
    padding: 88px 0;
    position: relative;
    overflow: hidden;
}
.cta-section::before { display: none; }
.cta-inner { text-align: center; position: relative; z-index: 1; }
.cta-inner h2 {
    font-size: 2.1rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
    letter-spacing: -.03em;
}
.cta-inner p { color: rgba(255,255,255,.8); font-size: 1.05rem; margin-bottom: 32px; }

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,.55);
    padding: 64px 0 32px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr;
    gap: 36px;
    margin-bottom: 36px;
}
.footer-secondary {
    border-top: 1px solid rgba(255,255,255,.08);
    padding-top: 24px;
    margin-bottom: 24px;
}
.footer-links-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 24px;
}
.footer-links-row a {
    font-size: .78rem;
    color: rgba(255,255,255,.5);
    transition: color var(--t) var(--ease);
}
.footer-links-row a:hover { color: var(--accent); }
.footer-logo { margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.footer-logo .logo-text { display: flex; align-items: baseline; gap: 1px; }
.footer-logo .logo-on     { font-size: 1.3rem; font-weight: 900; color: #34D399; letter-spacing: -.03em; }
.footer-logo .logo-credit { font-size: 1.3rem; font-weight: 900; color: #fff; letter-spacing: -.03em; }
.footer-logo .logo-cz     { font-size: .75rem; font-weight: 600; color: rgba(255,255,255,.35); }
.footer-col p { font-size: .83rem; line-height: 1.7; color: rgba(255,255,255,.5); }
.footer-col h4 { color: rgba(255,255,255,.9); font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 16px; }
.footer-col a {
    display: block;
    font-size: .83rem;
    color: rgba(255,255,255,.45);
    margin-bottom: 9px;
    transition: color var(--t-fast) ease;
}
.footer-col a:hover { color: rgba(255,255,255,.9); }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.07);
    padding-top: 24px;
    text-align: center;
}
.footer-bottom p { font-size: .8rem; color: rgba(255,255,255,.35); }
.footer-disclaimer {
    margin-top: 10px;
    font-size: .7rem;
    color: rgba(255,255,255,.25);
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* ===== STICKY BAR ===== */
.sticky-bar {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: rgba(255,255,255,.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border);
    padding: 10px 0;
    z-index: 800;
    transform: translateY(100%);
    transition: transform var(--t) var(--ease);
    box-shadow: 0 -4px 24px rgba(15,23,42,.08);
}
.sticky-bar.visible { transform: translateY(0); }
.sticky-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.sticky-info { font-size: .88rem; font-weight: 600; color: var(--text); }
.sticky-sep { color: var(--border); margin: 0 6px; }
.sticky-total { font-size: .88rem; color: var(--text-muted); font-weight: 500; }

/* ===== OVERLAY / MODALS ===== */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(9,18,36,.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow-y: auto;
}
.overlay.active { display: flex; }
.overlay-content {
    background: #fff;
    border-radius: var(--r-lg);
    max-width: 460px;
    width: 100%;
    padding: 32px 30px;
    position: relative;
    animation: slideUp .35s var(--ease);
    max-height: 92vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}
.overlay-close {
    position: absolute;
    top: 18px; right: 22px;
    font-size: 1.6rem;
    color: var(--text-light);
    line-height: 1;
    transition: color var(--t-fast) ease, transform var(--t-fast) ease;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--r-xs);
}
.overlay-close:hover { color: var(--text); background: var(--surface); }
@keyframes slideUp {
    from { opacity: 0; transform: translateY(24px) scale(.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ===== FORM MODAL ===== */
.form-modal h3 {
    font-size: 1.28rem;
    font-weight: 800;
    letter-spacing: -.03em;
    margin-bottom: 4px;
}
.form-sub { color: var(--text-muted); font-size: .85rem; margin-bottom: 4px; line-height: 1.4; }
.form-required-hint { font-size: .74rem; color: var(--text-light); margin-bottom: 18px; }
.req { color: #EF4444; font-weight: 700; }
.form-sliders {
    margin-bottom: 18px;
    padding: 16px 16px 14px;
    background: var(--bg-alt);
    border-radius: var(--r-sm);
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.form-sliders .form-field { margin-bottom: 0; }
.form-field { margin-bottom: 13px; }
.form-field label {
    display: block;
    font-size: .74rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: .01em;
    margin-bottom: 6px;
}
.form-sliders .form-field label { text-transform: none; font-size: .82rem; color: var(--text-secondary); }
.form-sliders .form-field label strong { color: var(--primary-dark); font-weight: 800; }
.form-field input[type="text"],
.form-field input[type="tel"],
.form-field input[type="email"] {
    width: 100%;
    padding: 12px 15px;
    border: 1.5px solid var(--border);
    border-radius: var(--r-sm);
    font-size: .92rem;
    color: var(--text);
    transition: border-color var(--t-fast) ease, box-shadow var(--t-fast) ease;
    outline: none;
    background: #fff;
}
.form-field input::placeholder { color: var(--text-light); }
.form-field input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(5,150,105,.1);
}
.form-field input.err { border-color: #EF4444; box-shadow: 0 0 0 3px rgba(239,68,68,.1); }
.form-check {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    margin-bottom: 10px;
}
.form-check input[type="checkbox"] {
    margin-top: 1px;
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
    flex-shrink: 0;
}
.form-check label { font-size: .78rem; color: var(--text-muted); line-height: 1.4; }
.form-check a { color: var(--primary); text-decoration: underline; }
#leadForm .btn { margin-top: 10px; }

/* ===== LOADING MODAL ===== */
.loading-modal {
    text-align: center;
    max-width: 380px;
    padding: 34px 30px;
}
.spinner-wrap {
    position: relative;
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
}
.spinner {
    width: 56px;
    height: 56px;
    border: 3px solid var(--primary-100);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin .8s linear infinite;
}
.spinner-count {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary-dark);
    letter-spacing: -.02em;
    font-variant-numeric: tabular-nums;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-modal h3 {
    font-size: 1.12rem;
    font-weight: 800;
    margin-bottom: 5px;
    letter-spacing: -.02em;
}
.loading-modal p { color: var(--text-muted); font-size: .85rem; margin-bottom: 22px; }
.loading-steps { text-align: left; display: flex; flex-direction: column; gap: 5px; }
.loading-step {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    font-size: .84rem;
    color: var(--text-light);
    border-radius: var(--r-sm);
    background: var(--bg-alt);
    transition: all var(--t-slow) var(--ease);
    font-weight: 600;
}
/* Icon tick do assets/css/icons.css xử lý (clock → check qua SVG mask).
   Ở đây chỉ style màu/nền cho trạng thái. */
.loading-step { color: var(--text-light); }
.loading-step.active {
    color: var(--primary-dark);
    background: var(--primary-50);
    font-weight: 700;
}

/* ===== OFFERS MODAL ===== */
.offers-modal {
    max-width: 600px;
    max-height: 92vh;
    overflow-y: auto;
    padding: 28px 28px 22px;
}
.offers-modal h3 {
    font-size: 1.18rem;
    font-weight: 800;
    letter-spacing: -.02em;
    margin-bottom: 4px;
}
.offers-sub { color: var(--text-muted); font-size: .83rem; margin-bottom: 18px; line-height: 1.45; }
.offers-list { display: flex; flex-direction: column; gap: 10px; }
.offer-card {
    border: 1.5px solid var(--border);
    border-radius: var(--r);
    padding: 16px 18px;
    transition: all var(--t) var(--ease);
    position: relative;
    background: #fff;
}
.offer-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}
.offer-card.recommended {
    border-color: var(--primary);
    background: linear-gradient(180deg, var(--primary-50), #fff 60%);
    box-shadow: 0 0 0 3px rgba(5,150,105,.08);
}
.offer-badge {
    position: absolute;
    top: -9px; right: 14px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: #78350F;
    font-size: .64rem;
    font-weight: 800;
    padding: 3px 11px;
    border-radius: var(--r-full);
    text-transform: uppercase;
    letter-spacing: .04em;
    box-shadow: var(--shadow-xs);
}
.offer-badge.promo { background: var(--primary); }
.offer-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}
.offer-title {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}
.offer-logo-wrap {
    flex-shrink: 0;
    width: 112px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-xs);
    padding: 6px 10px;
}
.offer-logo-img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
}
.offer-logo {
    width: 42px;
    height: 42px;
    background: var(--surface);
    border-radius: var(--r-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .62rem;
    font-weight: 800;
    color: var(--text-muted);
}
/* Fallback khi ảnh logo lỗi: hiện tên nhà cung cấp dạng chữ trong khung */
.offer-logo-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: .82rem;
    font-weight: 800;
    color: var(--primary-dark);
    letter-spacing: -.01em;
    line-height: 1.1;
}
.offer-name {
    font-size: .98rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -.02em;
}
.offer-promo-text {
    font-size: .76rem;
    color: var(--primary-dark);
    font-weight: 600;
    line-height: 1.3;
}
.offer-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    margin-bottom: 11px;
}
.offer-stat {
    text-align: center;
    background: var(--bg-alt);
    border-radius: var(--r-xs);
    padding: 7px 5px;
}
.offer-stat-label {
    display: block;
    font-size: .64rem;
    color: var(--text-light);
    margin-bottom: 2px;
    text-transform: uppercase;
    letter-spacing: .04em;
    font-weight: 600;
}
.offer-stat-value {
    display: block;
    font-size: .82rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -.01em;
}
.offer-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.offer-info { font-size: .75rem; color: var(--text-light); font-weight: 500; }
.offer-perks {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 12px;
}
.offer-perk {
    font-size: .7rem;
    font-weight: 600;
    color: var(--primary-dark);
    background: var(--primary-50);
    border: 1px solid var(--primary-100);
    padding: 3px 9px;
    border-radius: var(--r-full);
    white-space: nowrap;
}
.offer-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 11px 20px;
    border-radius: var(--r-sm);
    font-weight: 700;
    font-size: .9rem;
    background: var(--primary-50);
    color: var(--primary);
    border: 1.5px solid var(--primary-100);
    transition: all var(--t) var(--ease);
}
.offer-cta:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-blue);
}
.offer-cta-primary {
    background: linear-gradient(135deg, #10B981, #059669);
    color: #fff;
    border: none;
    box-shadow: 0 2px 12px rgba(5,150,105,.35);
}
.offer-cta-primary:hover {
    background: linear-gradient(135deg, #059669, #047857);
    box-shadow: 0 6px 20px rgba(5,150,105,.45);
}
.offers-disclaimer { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
.offers-disclaimer p { font-size: .7rem; color: var(--text-light); text-align: center; line-height: 1.5; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero-inner { grid-template-columns: 1fr 380px; gap: 48px; }
    .benefits-grid { grid-template-columns: 1fr; }
    .visual-box { position: static; }
}
@media (max-width: 900px) {
    .hero-inner { grid-template-columns: 1fr; }
    .calculator-card { max-width: 480px; margin: 0 auto; }
    .hero h1 { font-size: 2.2rem; }
    .steps-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid::before { display: none; }
    .footer-grid { grid-template-columns: repeat(3, 1fr); gap: 28px; }
    .footer-grid .footer-col:first-child { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
    .container { padding: 0 16px; }
    .hero-inner { gap: 32px; }
    /* ===== MENU MOBILE (dropdown từ trên — KHÔNG dùng translateX để tránh tràn ngang) ===== */
    .nav {
        position: fixed;
        top: 68px;
        left: 0;
        right: 0;
        width: 100%;
        background: #fff;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        padding: 12px 16px 18px;
        box-shadow: 0 12px 28px rgba(15,23,42,.15);
        border-bottom: 1px solid var(--border);
        z-index: 1000;
        /* Ẩn khi đóng: không chiếm không gian, không gây scroll */
        opacity: 0;
        visibility: hidden;
        transform: translateY(-8px);
        transition: opacity .22s ease, transform .22s ease, visibility .22s ease;
    }
    .nav.open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    .nav a {
        display: block;
        text-align: left;
        padding: 14px 14px;
        border-radius: var(--r-sm);
        font-size: 1.05rem;
        font-weight: 600;
        color: var(--text);
        border-bottom: 1px solid var(--border);
    }
    .nav a:last-child { border-bottom: none; }
    .nav a:active, .nav a:hover { background: var(--primary-50); color: var(--primary); }
    .header-cta { display: none; }
    .burger { display: flex; position: relative; z-index: 1001; margin-right: 4px; }
    /* Tăng khoảng thở 2 bên header trên mobile để logo/menu không sát mép */
    .header-inner { padding-left: 20px; padding-right: 20px; }
    /* Header phải nổi TRÊN backdrop khi menu mở (header tạo stacking context
       riêng ở z-index 900; backdrop ở body sẽ đè lên nav nếu không nâng header). */
    .header { z-index: 1000; }
    /* Lớp phủ tối phía sau menu — đặt DƯỚI header/nav để không che menu */
    .nav-backdrop {
        position: fixed; inset: 0; top: 68px;
        background: rgba(9,18,36,.5);
        opacity: 0; visibility: hidden;
        transition: opacity .22s ease, visibility .22s ease;
        z-index: 990;
    }
    .nav-backdrop.open { opacity: 1; visibility: visible; }
    .hero { padding: 96px 0 56px; }
    .hero h1 { font-size: 1.9rem; }
    .hero-pills { gap: 6px; }
    .pill { font-size: .78rem; padding: 6px 12px; }
    /* Trust-row: lưới 3 cột co được, không tràn ngang trên mobile nhỏ */
    .trust-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .trust-item { min-width: 0; }
    .trust-item strong { font-size: 1.05rem; }
    .trust-item span { font-size: .72rem; }
    /* Calculator card full-width trên mobile, không vượt viewport */
    .calculator-card { padding: 24px 18px; }
    .slider-value { font-size: 1.7rem; }
    .slider-range { font-size: .72rem; }
    .calc-row { font-size: .88rem; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .conditions-grid { grid-template-columns: 1fr; gap: 12px; }
    .reviews-grid { grid-template-columns: 1fr; }
    .section-title { font-size: 1.6rem; }
    .section { padding: 48px 0; }
    .overlay-content { padding: 24px 18px; border-radius: var(--r); }
    .offers-modal { padding: 22px 16px; }
    .sticky-total { display: none; }
    .sticky-info { font-size: .82rem; }
    .cta-inner h2 { font-size: 1.7rem; }

    /* Condition-card: layout NGANG căn trái trên mobile (gọn, dễ đọc) */
    .condition-card {
        display: grid; grid-template-columns: auto 1fr;
        gap: 14px; align-items: start;
        text-align: left; padding: 18px 18px;
    }
    .condition-icon { margin: 0; width: 46px; height: 46px; font-size: 1.5rem; grid-row: span 2; }
    .condition-card h4 { margin-bottom: 4px; align-self: center; }
    .condition-card p { grid-column: 2; }

    /* Step-card: layout NGANG căn trái trên mobile */
    .step-card { text-align: left; padding: 18px 18px 18px 60px; position: relative; }
    .step-num { position: absolute; top: 18px; left: 16px; margin: 0; }
    .step-icon { display: none; }
    .step-card h4 { margin-top: 2px; }

    /* Giảm khoảng cách tiêu đề section trên mobile */
    .section-head, .section-header { margin-bottom: 28px; }
}
@media (max-width: 480px) {
    .hero h1 { font-size: 1.6rem; }
    .steps-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
    .offer-stats { grid-template-columns: repeat(3, 1fr); gap: 6px; }
    .offer-footer { flex-direction: column; align-items: flex-start; gap: 10px; }
    .btn-offer, .btn-offer-primary { width: 100%; justify-content: center; }
}

/* Offer card mobile */
@media (max-width: 640px) {
    .offer-stats { grid-template-columns: repeat(2, 1fr); }
    .offer-header { flex-wrap: wrap; }
    .offer-perk { white-space: normal; }
}

/* ===== PROVIDER CARDS (homepage) ===== */
.pcard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}
.pcard {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    box-shadow: var(--shadow-xs);
    transition: all var(--t) var(--ease);
    position: relative;
}
.pcard:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-100);
}
.pcard.recommended { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(251,191,36,.15); }
.pcard-badge {
    position: absolute;
    top: -10px; left: 16px;
    background: linear-gradient(135deg, #FBBF24, #F59E0B);
    color: #78350F;
    font-size: .66rem;
    font-weight: 800;
    padding: 4px 12px;
    border-radius: var(--r-full);
    text-transform: uppercase;
    letter-spacing: .04em;
}
.pcard-logo {
    height: 58px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-alt);
    border-radius: var(--r-sm);
    padding: 10px 16px;
}
.pcard-logo img { max-height: 100%; max-width: 160px; object-fit: contain; }
.pcard-rows { display: flex; flex-direction: column; }
.pcard-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 7px 0;
    font-size: .85rem;
    border-bottom: 1px dashed var(--border);
}
.pcard-row:last-child { border-bottom: none; }
.pcard-row span { color: var(--text-muted); }
.pcard-row strong { color: var(--text); font-weight: 700; letter-spacing: -.01em; }
.pcard-perk {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: .78rem;
    font-weight: 600;
    color: var(--primary-dark);
    background: var(--primary-50);
    border: 1px solid var(--primary-100);
    padding: 9px 12px;
    border-radius: var(--r-sm);
    line-height: 1.35;
}
.pcard-perk .ic { color: var(--primary); flex-shrink: 0; width: 15px; height: 15px; margin-top: 1px; }
.pcard-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    border-radius: var(--r-sm);
    font-weight: 700;
    font-size: .9rem;
    background: linear-gradient(135deg, #10B981, #059669);
    color: #fff;
    box-shadow: 0 2px 10px rgba(5,150,105,.3);
    transition: all var(--t) var(--ease);
    margin-top: auto;
}
.pcard-cta:hover { transform: translateY(-1px); box-shadow: 0 5px 16px rgba(5,150,105,.4); }

/* ===== MOBILE POLISH ===== */
@media (max-width: 768px) {
    .stat-num { font-size: 1.35rem; white-space: nowrap; }
    .stat-card { padding: 18px 12px; }
}
@media (max-width: 480px) {
    .offer-header { flex-wrap: wrap; }
    .offer-logo-wrap { width: 120px; height: 48px; }
    .offer-title { width: 100%; }
}

/* ===== OFFER FIT-SORTING (calculator match) ===== */
.offer-card.fits {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(5,150,105,.12), var(--shadow);
}
.offer-badge.fit-badge {
    background: linear-gradient(135deg, #10B981, #059669);
    color: #fff;
    letter-spacing: .02em;
}
.offer-stat-value.mismatch {
    color: var(--text-light);
    position: relative;
    opacity: .7;
}
.offer-stat-value.mismatch::after {
    content: " ⚠";
    font-size: .7em;
    color: var(--accent-hover);
}
/* Divider giữa nhóm phù hợp và không phù hợp — subtle */
.offers-list { display: flex; flex-direction: column; }

/* ===== ẨN SCROLLBAR (giữ khả năng cuộn) ===== */
html {
    scrollbar-width: none;          /* Firefox */
    -ms-overflow-style: none;       /* IE/Edge cũ */
}
html::-webkit-scrollbar { width: 0; height: 0; display: none; }  /* Chrome/Safari */

/* Ẩn scrollbar trong các modal cuộn được */
.overlay,
.overlay-content,
.offers-modal { scrollbar-width: none; -ms-overflow-style: none; }
.overlay::-webkit-scrollbar,
.overlay-content::-webkit-scrollbar,
.offers-modal::-webkit-scrollbar { width: 0; height: 0; display: none; }