/* ===== BẢO HÀNH & DỊCH VỤ - Premium Redesign ===== */
:root {
    --vf-primary: #1464f4;
    --vf-primary-dark: #0a3fa8;
    --vf-primary-light: #e8f0fe;
    --vf-accent: #00d4aa;
    --vf-dark: #0a1628;
    --vf-text: #1e293b;
    --vf-muted: #64748b;
    --vf-border: rgba(226,232,240,0.7);
    --vf-glass: rgba(255,255,255,0.72);
    --vf-glass-border: rgba(255,255,255,0.35);
    --vf-radius: 24px;
    --vf-shell: 1200px;
}
html { scroll-behavior: smooth; }
body { max-width: 100%; overflow-x: clip; }

/* === PAGE WRAPPER === */
.vfs-page {
    background: linear-gradient(180deg,#f0f4ff 0%,#fff 30%,#f8fafc 100%);
    color: var(--vf-text);
    font-family: 'Inter', system-ui, sans-serif;
}

.vfs-shell {
    max-width: var(--vf-shell);
    margin: 0 auto;
    padding: 0 24px;
}

/* === HERO === */
.vfs-hero {
    position: relative;
    overflow: hidden;
    padding: 0;
}
.vfs-hero-bg {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
}
.vfs-hero-bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,rgba(10,22,40,0.88) 0%,rgba(20,100,244,0.55) 60%,rgba(10,22,40,0.75) 100%);
}
.vfs-hero-inner {
    position: relative;
    z-index: 2;
    max-width: var(--vf-shell);
    margin: 0 auto;
    padding: 80px 24px 64px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: center;
}
.vfs-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #fff;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    backdrop-filter: blur(8px);
    margin-bottom: 20px;
}
.vfs-hero h1 {
    font-size: clamp(2.2rem,4vw,3.8rem);
    font-weight: 900;
    line-height: 1.08;
    letter-spacing: -0.03em;
    color: #fff;
    margin: 0 0 20px;
}
.vfs-hero h1 span {
    display: block;
    background: linear-gradient(135deg,#60a5fa,#00d4aa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.vfs-hero-lead {
    font-size: 17px;
    line-height: 1.8;
    color: rgba(255,255,255,0.85);
    max-width: 560px;
    margin: 0 0 28px;
}
.vfs-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}
.vfs-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 14px;
    font-weight: 700;
    font-size: 15px;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}
.vfs-btn--primary {
    color: #fff;
    background: linear-gradient(135deg,var(--vf-primary),#3b82f6);
    box-shadow: 0 12px 32px rgba(20,100,244,0.35);
}
.vfs-btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(20,100,244,0.45);
}
.vfs-btn--outline {
    color: #fff;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.3);
    backdrop-filter: blur(6px);
}
.vfs-btn--outline:hover {
    background: rgba(255,255,255,0.18);
}

/* Hero Stats Panel */
.vfs-hero-stats {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    backdrop-filter: blur(16px);
    border-radius: 28px;
    padding: 32px;
}
.vfs-hero-stats-title {
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--vf-accent);
    margin-bottom: 8px;
}
.vfs-hero-stats-metric {
    font-size: clamp(2.8rem,4vw,4rem);
    font-weight: 900;
    line-height: 1;
    color: #fff;
    margin-bottom: 12px;
}
.vfs-hero-stats p {
    color: rgba(255,255,255,0.75);
    line-height: 1.7;
    font-size: 15px;
}
.vfs-hero-features {
    display: grid;
    gap: 0;
    margin-top: 24px;
}
.vfs-hero-feature {
    display: flex;
    gap: 14px;
    padding: 16px 0;
    border-top: 1px solid rgba(255,255,255,0.1);
}
.vfs-hero-feature:first-child { border-top: 0; padding-top: 0; }
.vfs-hero-feature-dot {
    width: 10px;
    height: 10px;
    margin-top: 7px;
    flex-shrink: 0;
    border-radius: 50%;
    background: linear-gradient(135deg,#60a5fa,var(--vf-accent));
    box-shadow: 0 0 0 4px rgba(0,212,170,0.15);
}
.vfs-hero-feature strong {
    display: block;
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}
.vfs-hero-feature span {
    display: block;
    font-size: 13px;
    color: rgba(255,255,255,0.65);
    line-height: 1.6;
}

/* === QUICK STATS BAR === */
.vfs-quick-stats {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 20px;
    margin: -40px auto 48px;
    position: relative;
    z-index: 5;
}
.vfs-stat-card {
    background: #fff;
    border: 1px solid var(--vf-border);
    border-radius: 20px;
    padding: 28px 24px;
    text-align: center;
    box-shadow: 0 16px 48px rgba(15,23,42,0.07);
    transition: all 0.35s ease;
    position: relative;
    overflow: hidden;
}
.vfs-stat-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg,var(--vf-primary),var(--vf-accent));
    opacity: 0;
    transition: opacity 0.3s;
}
.vfs-stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 56px rgba(15,23,42,0.12);
}
.vfs-stat-card:hover::before { opacity: 1; }
.vfs-stat-eyebrow {
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--vf-primary);
    margin-bottom: 8px;
}
.vfs-stat-card h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--vf-text);
    margin: 0 0 10px;
}
.vfs-stat-value {
    font-size: 26px;
    font-weight: 900;
    letter-spacing: -0.03em;
    color: var(--vf-dark);
    margin-bottom: 10px;
    background: linear-gradient(135deg,var(--vf-primary),#3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.vfs-stat-card p {
    font-size: 13px;
    color: var(--vf-muted);
    line-height: 1.6;
}

/* === STICKY NAV === */
.vfs-anchor-nav {
    position: sticky;
    top: 64px;
    z-index: 30;
    margin-bottom: 36px;
}
.vfs-anchor-track {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding: 8px;
    border-radius: 18px;
    background: rgba(10,22,40,0.85);
    backdrop-filter: blur(12px);
    box-shadow: 0 12px 40px rgba(15,23,42,0.18);
    scrollbar-width: none;
}
.vfs-anchor-track::-webkit-scrollbar { display: none; }
.vfs-anchor-track a {
    white-space: nowrap;
    padding: 10px 18px;
    border-radius: 12px;
    color: rgba(255,255,255,0.7);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s ease;
}
.vfs-anchor-track a:hover { color: #fff; background: rgba(255,255,255,0.1); }
.vfs-anchor-track a.is-active {
    color: var(--vf-dark);
    background: #fff;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Desktop vertical dots */
@media (min-width:1280px) {
    .vfs-anchor-nav {
        position: fixed; top: 50%; right: 18px;
        width: auto; margin: 0;
        transform: translateY(-50%); z-index: 60;
    }
    .vfs-anchor-track {
        flex-direction: column; align-items: center;
        overflow: visible; padding: 10px 8px;
        border-radius: 999px; background: rgba(10,22,40,0.5);
        border: 1px solid rgba(255,255,255,0.15);
    }
    .vfs-anchor-track a {
        width: 14px; height: 14px; padding: 0;
        border-radius: 50%; font-size: 0;
        background: rgba(255,255,255,0.3);
        border: 1px solid rgba(255,255,255,0.2);
        position: relative;
    }
    .vfs-anchor-track a:hover { transform: scale(1.15); background: rgba(255,255,255,0.6); }
    .vfs-anchor-track a.is-active {
        background: #fff;
        box-shadow: 0 0 0 4px rgba(20,100,244,0.25);
    }
    .vfs-anchor-track a::after {
        content: attr(data-label);
        position: absolute; right: calc(100% + 14px); top: 50%;
        transform: translateY(-50%);
        padding: 8px 14px; border-radius: 10px;
        background: rgba(10,22,40,0.92); color: rgba(255,255,255,0.9);
        font-size: 12px; line-height: 1; font-weight: 600;
        white-space: nowrap; pointer-events: none;
        opacity: 0; transition: opacity 0.2s;
        box-shadow: 0 8px 24px rgba(0,0,0,0.3);
    }
    .vfs-anchor-track a:hover::after { opacity: 1; }
}

/* === SECTIONS === */
.vfs-section {
    background: #fff;
    border: 1px solid var(--vf-border);
    border-radius: var(--vf-radius);
    padding: 40px;
    margin-bottom: 28px;
    scroll-margin-top: 140px;
    box-shadow: 0 8px 32px rgba(15,23,42,0.04);
}
.vfs-section-head {
    margin-bottom: 32px;
}
.vfs-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--vf-primary);
}
.vfs-kicker-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--vf-primary);
}
.vfs-section h2 {
    font-size: clamp(1.6rem,2.8vw,2.4rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    color: var(--vf-dark);
    margin: 0 0 12px;
    line-height: 1.15;
}
.vfs-section-desc {
    max-width: 680px;
    color: var(--vf-muted);
    line-height: 1.75;
    font-size: 15px;
}

/* === CARDS & GRIDS === */
.vfs-grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 20px; }
.vfs-grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }

.vfs-card {
    background: #f8fafc;
    border: 1px solid var(--vf-border);
    border-radius: 20px;
    padding: 28px;
    transition: all 0.3s ease;
}
.vfs-card:hover {
    box-shadow: 0 12px 36px rgba(15,23,42,0.08);
    border-color: rgba(20,100,244,0.2);
}
.vfs-card h3 {
    font-size: 18px;
    font-weight: 800;
    color: var(--vf-dark);
    margin: 0 0 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.vfs-card h3 .vfs-icon {
    width: 36px; height: 36px;
    border-radius: 10px;
    background: var(--vf-primary-light);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.vfs-card h3 .vfs-icon svg { width: 18px; height: 18px; color: var(--vf-primary); }

/* === TABLE === */
.vfs-table-wrap {
    background: #fff;
    border: 1px solid var(--vf-border);
    border-radius: 18px;
    overflow: hidden;
}
.vfs-table-scroll { overflow-x: auto; scrollbar-width: thin; }
.vfs-table {
    width: 100%;
    min-width: 560px;
    border-collapse: collapse;
}
.vfs-table thead th {
    padding: 16px 22px;
    text-align: left;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--vf-dark);
    background: linear-gradient(180deg,rgba(20,100,244,0.08),rgba(20,100,244,0.02));
    border-bottom: 2px solid rgba(20,100,244,0.1);
}
.vfs-table td {
    padding: 16px 22px;
    font-size: 14px;
    color: var(--vf-text);
    line-height: 1.7;
    vertical-align: top;
}
.vfs-table td:first-child { font-weight: 700; color: var(--vf-dark); width: 30%; }
.vfs-table tbody tr + tr td { border-top: 1px solid var(--vf-border); }

/* === LISTS === */
.vfs-list { display: grid; gap: 10px; list-style: none; padding: 0; margin: 0; }
.vfs-list li {
    position: relative;
    padding-left: 20px;
    font-size: 14px;
    line-height: 1.75;
    color: #475569;
}
.vfs-list li::before {
    content: "";
    position: absolute;
    left: 0; top: 10px;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: linear-gradient(135deg,var(--vf-primary),#60a5fa);
}

/* === ACCORDION === */
.vfs-accordion { display: grid; gap: 14px; }
.vfs-accordion-item {
    background: #fff;
    border: 1px solid var(--vf-border);
    border-radius: 18px;
    overflow: hidden;
    transition: box-shadow 0.3s;
}
.vfs-accordion-item:hover { box-shadow: 0 4px 20px rgba(15,23,42,0.06); }
.vfs-accordion-toggle {
    width: 100%;
    display: flex; align-items: center; justify-content: space-between;
    gap: 16px; padding: 20px 24px;
    background: none; border: none; cursor: pointer; text-align: left;
}
.vfs-accordion-toggle span {
    font-size: 18px; font-weight: 800; color: var(--vf-dark);
}
.vfs-acc-icon {
    width: 32px; height: 32px; flex-shrink: 0;
    border-radius: 10px;
    background: var(--vf-primary-light);
    display: flex; align-items: center; justify-content: center;
    transition: all 0.3s;
}
.vfs-acc-icon svg {
    width: 16px; height: 16px; color: var(--vf-primary);
    transition: transform 0.3s;
}
.vfs-accordion-item.is-open .vfs-acc-icon { background: var(--vf-primary); }
.vfs-accordion-item.is-open .vfs-acc-icon svg { color: #fff; transform: rotate(45deg); }
.vfs-accordion-body { display: none; padding: 0 24px 24px; }
.vfs-accordion-item.is-open .vfs-accordion-body { display: block; }

/* === NOTE BOX === */
.vfs-note {
    background: linear-gradient(135deg,#f0f7ff,#e8f4f8);
    border: 1px solid rgba(20,100,244,0.12);
    border-radius: 18px;
    padding: 24px;
    margin-top: 20px;
}
.vfs-note strong {
    display: flex; align-items: center; gap: 8px;
    font-size: 14px; font-weight: 800;
    text-transform: uppercase; letter-spacing: 0.08em;
    color: var(--vf-primary); margin-bottom: 10px;
}
.vfs-note p { font-size: 14px; color: #475569; line-height: 1.75; margin: 0; }

/* === FULL-BLEED BANNER === */
.vfs-banner-outer {
    width: 100vw;
    margin: 36px calc(50% - 50vw);
    padding: 0 24px;
    overflow: hidden;
}
.vfs-banner {
    position: relative;
    min-height: clamp(240px,30vw,380px);
    display: flex; align-items: flex-end;
    background-size: cover; background-position: center;
    border-radius: 28px;
    overflow: hidden;
    box-shadow: 0 20px 56px rgba(15,23,42,0.15);
}
.vfs-banner::before {
    content: "";
    position: absolute; inset: 0;
    background: linear-gradient(120deg,rgba(10,22,40,0.82) 0%,rgba(20,100,244,0.3) 60%,rgba(10,22,40,0.7) 100%);
}
.vfs-banner-content {
    position: relative; z-index: 1;
    width: 100%; max-width: var(--vf-shell);
    margin: 0 auto; padding: 36px 32px;
    color: #fff;
}
.vfs-banner-content h2 {
    font-size: clamp(1.4rem,2.8vw,2.2rem);
    font-weight: 900; letter-spacing: -0.02em; margin: 0 0 8px;
}
.vfs-banner-content p {
    font-size: 15px; line-height: 1.7; color: rgba(255,255,255,0.85); max-width: 600px; margin: 0;
}

/* === EXCLUSION === */
.vfs-exclusion-card {
    background: linear-gradient(135deg,#fef2f2,#fff5f5);
    border: 1px solid rgba(239,68,68,0.12);
    border-radius: 20px;
    padding: 32px;
}
.vfs-exclusion-card h3 {
    display: flex; align-items: center; gap: 10px;
    font-size: 16px; font-weight: 800; color: #dc2626;
    margin: 0 0 20px;
}
.vfs-exclusion-list li::before {
    background: linear-gradient(135deg,#ef4444,#f87171);
}

/* === FOOTNOTE === */
.vfs-footnote {
    margin-top: 16px; padding-top: 16px;
    border-top: 1px dashed rgba(148,163,184,0.4);
    font-size: 13px; color: var(--vf-muted); line-height: 1.7;
}

/* === ANIMATIONS === */
.vfs-reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22,1,0.36,1);
}
.vfs-reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
    .vfs-reveal, .vfs-reveal.is-visible { opacity: 1; transform: none; transition: none; }
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .vfs-hero-inner { grid-template-columns: 1fr; gap: 32px; }
    .vfs-quick-stats { grid-template-columns: repeat(2,1fr); margin-top: -30px; }
    .vfs-grid-2, .vfs-grid-3 { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 767px) {
    .vfs-shell { padding: 0 16px; }
    .vfs-hero-bg { min-height: 400px; }
    .vfs-hero-inner { padding: 60px 16px 48px; gap: 24px; }
    .vfs-hero h1 { font-size: clamp(1.8rem,8vw,2.4rem); }
    .vfs-hero-lead { font-size: 15px; }
    .vfs-hero-actions { flex-direction: column; }
    .vfs-btn { width: 100%; justify-content: center; padding: 14px 20px; }
    .vfs-quick-stats { grid-template-columns: 1fr; margin-top: -24px; gap: 12px; }
    .vfs-grid-2, .vfs-grid-3 { grid-template-columns: 1fr; }
    .vfs-section { padding: 24px; border-radius: 20px; }
    .vfs-card { padding: 22px; }
    .vfs-anchor-nav { top: 64px; }
    .vfs-anchor-track { gap: 4px; padding: 6px; border-radius: 14px; }
    .vfs-anchor-track a { padding: 8px 14px; font-size: 12px; }
    .vfs-banner-outer { padding: 0 12px; margin: 24px calc(50% - 50vw); }
    .vfs-accordion-toggle span { font-size: 16px; }
    .vfs-stat-value { font-size: 22px; }
}