/* ============================================================
   5G VIETTEL - MAIN STYLESHEET
   Tone: Đỏ Viettel (#d92315) · Trắng · Xám
   ============================================================ */

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

:root {
    --vt-red: #d92315;
    --vt-red-dark: #b71c1c;
    --vt-red-light: #ff5252;
    --vt-red-bg: #fef2f2;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,.12);
    --shadow-xl: 0 12px 40px rgba(0,0,0,.18);
    --transition: .3s ease;
}

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--gray-800);
    background: var(--gray-50);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
.vietteldata-detail, .vt-item-view
{
	background:#FFFFFF;

}

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

/* ---------- CONTAINER ---------- */
.container-seo {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;

}

/* ---------- SECTION SPACING ---------- */
.tech-section,
.group-section,
.consult-section,
.seo-article-section,
.infra-section,
.seo-faq-section,
.bottom-trust-section,
#dieu-kien-su-dung-5g-viettel,
#gioi-thieu-cuoi-trang {
    padding:;
}

/* ==========================================================
   1. HERO SECTION
   ========================================================== */
.tech-hero-section {
    position: relative;
    background: linear-gradient(135deg, var(--gray-900) 0%, #1a0a0a 50%, var(--vt-red-dark) 100%);
    padding: 70px 0 60px;
    text-align: center;
    overflow: hidden;
}

.tech-bg-overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(217,35,21,.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 30%, rgba(217,35,21,.1) 0%, transparent 40%);
    pointer-events: none;
}

.tech-tag {
    display: inline-block;
    background: #FFF !important;
    border: 1px solid rgba(217,35,21,.4);
	position:relative;
    color: #111;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    padding: 6px 18px;
    border-radius: 50px;
    margin-bottom: 20px;
    text-transform: uppercase;
}

.main-title {
    font-size: clamp(26px, 4.5vw, 44px);
    font-weight: 800;
    line-height: 1.3;
    max-width: 800px;
    margin: 0 auto;
}

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

.text-gradient-5g {
    background: linear-gradient(90deg, #ff6b6b, #ff8a65, #ffd54f);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================================
   2. SECTION HEADERS
   ========================================================== */
.section-header-modern {
    text-align: center;
    margin-bottom: 35px;
}

.vt-group-title {
    font-size: clamp(20px, 3vw, 28px);
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.vt-group-title i {
    font-size: 24px;
}

.sub-lead {
    font-size: 15px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

.tab-intro {
    text-align: center;
    margin-bottom: 10px;
}

.goi-section-intro {
    text-align: center;
    margin-bottom: 30px;
}

.goi-section-intro p {
    font-size: 15px;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ==========================================================
   3. FEATURED GRID (CARD LAYOUT)
   ========================================================== */
.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
	padding-left:10px;
	padding-right:10px;
}

/* ==========================================================
   4. HERO CARD (GÓI CƯỚC)
   ========================================================== */
.hero-card {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1.5px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 38px 20px 20px;
    text-align: center;
    transition: all var(--transition);
    overflow: hidden;
}

.hero-card:hover {
    border-color: var(--vt-red);
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(217,35,21,.1);
    transform: translateY(-4px);
}

/* Card link overlay */
.card-link-overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
}

/* Badge — Ribbon style góc trên phải */
.card-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--vt-red);
    color: var(--white);
    font-size: 10.5px;
    font-weight: 800;
    letter-spacing: .6px;
    padding: 5px 14px 5px 16px;
    border-radius: 0 var(--radius-lg) 0 10px;
    z-index: 5;
    text-transform: uppercase;
    line-height: 1.3;
    box-shadow: -2px 2px 6px rgba(0,0,0,.12);
}

/* Card top */
.card-top {
    width: 100%;
    margin-bottom: 15px;
    z-index: 2;
    position: relative;
}

.pkg-name {
    font-size: 22px;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.pkg-price {
    font-size: 22px;
    font-weight: 800;
    color: var(--vt-red);
}

.pkg-price .cycle {
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-500);
}

/* ORB - vòng tròn data */
.card-orb {
    position: relative;
    width: 110px;
    height: 110px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 5px 0 15px;
    z-index: 2;
}

.orb-ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 3px solid currentColor;
    opacity: .25;
    animation: orbPulse 3s ease-in-out infinite;
}

.ring-blue   { color: #3b82f6; box-shadow: 0 0 15px rgba(59,130,246,.2); }
.ring-purple { color: #a855f7; box-shadow: 0 0 15px rgba(168,85,247,.2); }
.ring-green  { color: #22c55e; box-shadow: 0 0 15px rgba(34,197,94,.2); }
.ring-orange { color: #f59e0b; box-shadow: 0 0 15px rgba(245,158,11,.2); }
.ring-red    { color: #ef4444; box-shadow: 0 0 15px rgba(239,68,68,.2); }

@keyframes orbPulse {
    0%, 100% { transform: scale(1); opacity: .25; }
    50% { transform: scale(1.06); opacity: .45; }
}

.orb-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1;
}

.orb-val {
    font-size: 32px;
    font-weight: 900;
    color: var(--gray-900);
}

.orb-unit {
    font-size: 13px;
    font-weight: 700;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Card info */
.card-info {
    margin-bottom: 12px;
    z-index: 2;
    position: relative;
}

.daily-data {
    font-size: 18px;
    font-weight: 800;
    color: var(--vt-red);
    background: var(--vt-red-bg);
    padding: 4px 16px;
    border-radius: 50px;
    display: inline-block;
}

.pkg-desc {
    font-size: 13px;
    color: var(--gray-600);
    margin-top: 6px;
}

/* Benefit list */
.benefit-list {
    width: 100%;
    margin-bottom: 16px;
    z-index: 2;
    position: relative;
}

.benefit-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13.5px;
    color: var(--gray-700);
    padding: 5px 0;
    text-align: left;
}

.benefit-list li i {
    flex-shrink: 0;
    font-size: 14px;
    width: 18px;
    text-align: center;
}

.text-green  { color: #22c55e !important; }
.text-yellow { color: #f59e0b !important; }
.text-red    { color: #ef4444 !important; }
.text-blue   { color: #3b82f6 !important; }

/* CTA Button */
.btn-hero-reg {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 280px;
    background: linear-gradient(135deg, var(--vt-red), var(--vt-red-dark));
    color: var(--white);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .5px;
    padding: 12px 20px;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    z-index: 3;
    position: relative;
    box-shadow: 0 4px 15px rgba(217,35,21,.3);
}

.btn-hero-reg:hover {
    background: linear-gradient(135deg, var(--vt-red-light), var(--vt-red));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(217,35,21,.4);
}

/* Detail link */
.link-detail-bottom {
    display: block;
    margin-top: 10px;
    font-size: 13px;
    font-weight: 600;
    color: var(--vt-red);
    z-index: 3;
    position: relative;
    transition: color var(--transition);
}

.link-detail-bottom:hover {
    color: var(--vt-red-dark);
}

/* ==========================================================
   5. FLOATING FILTER
   ========================================================== */
.floating-filter {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
    padding: 12px 0;
}

.filter-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 14px;
}

.filter-label-tech {
    font-size: 14px;
    font-weight: 700;
    color: var(--gray-700);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
}

.filter-chips {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.chip-btn {
    background: var(--white);
    border: 1.5px solid var(--gray-200);
    color: var(--gray-600);
    font-size: 13px;
    font-weight: 600;
    padding: 7px 18px;
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.chip-btn:hover {
    border-color: var(--vt-red);
    color: var(--vt-red);
    background: var(--vt-red-bg);
}

.chip-btn.active {
    background: var(--vt-red);
    border-color: var(--vt-red);
    color: var(--white);
    box-shadow: 0 3px 10px rgba(217,35,21,.3);
}

/* Mobile filter */
.filter-mobile-dropdown { width: 100%; }

.select-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.select-wrapper select {
    width: 100%;
    appearance: none;
    -webkit-appearance: none;
    background: var(--white);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 10px 40px 10px 36px;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
    cursor: pointer;
}

.select-wrapper select:focus {
    outline: none;
    border-color: var(--vt-red);
    box-shadow: 0 0 0 3px rgba(217,35,21,.1);
}

.dropdown-icon-left {
    position: absolute;
    left: 12px;
    color: var(--vt-red);
    font-size: 14px;
    pointer-events: none;
}

.dropdown-arrow {
    position: absolute;
    right: 14px;
    color: var(--gray-400);
    font-size: 12px;
    pointer-events: none;
}

/* Responsive show/hide */
.show-on-mobile { display: none; }
.show-on-pc { display: flex; }

@media (max-width: 768px) {
    .show-on-pc { display: none !important; }
    .show-on-mobile { display: block !important; }
}

/* ==========================================================
   6. CONDITION BOX
   ========================================================== */
.condition-box-safe {
    background: var(--white);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-top: 10px;
}

.cond-safe-header {
    background: var(--gray-100);
    padding: 10px 18px;
    font-size: 13px;
    font-weight: 800;
    color: var(--gray-700);
    letter-spacing: .5px;
    border-bottom: 1px solid var(--gray-200);
}

.cond-safe-content {
    padding: 0 18px;
}

.cond-list-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
    flex-wrap: wrap;
}

.cond-list-item.no-border { border-bottom: none; }

.cond-pkg-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--gray-800);
    min-width: 140px;
}

.cond-pkg-info {
    font-size: 13px;
    color: var(--gray-600);
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.badge-red {
    display: inline-block;
    background: #fef2f2;
    color: var(--vt-red);
    border: 1px solid #fecaca;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 50px;
}

.badge-blue {
    display: inline-block;
    background: #eff6ff;
    color: #2563eb;
    border: 1px solid #bfdbfe;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 50px;
}

.badge-orange {
    display: inline-block;
    background: #fffbeb;
    color: #d97706;
    border: 1px solid #fde68a;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 50px;
}

/* ==========================================================
   7. SPEED CARDS
   ========================================================== */
#real-speed {
    background: var(--gray-900);
    padding: 50px 0;
}

#real-speed .vt-group-title {
    color: var(--white);
}

.speed-card {
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius-lg);
    padding: 24px 20px;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: all var(--transition);
}

.speed-card:hover {
    border-color: rgba(255,255,255,.25);
    background: rgba(255,255,255,.1);
    transform: translateY(-3px);
}

.speed-badge {
    display: inline-block;
    background: rgba(217,35,21,.2);
    border: 1px solid rgba(217,35,21,.4);
    color: #FFF;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 1px;
    padding: 3px 14px;
    border-radius: 50px;
    margin-bottom: 14px;
}

.speed-meter {
    color: #06b6d4;
    margin-bottom: 14px;
}

.speed-val {
    font-size: 42px;
    font-weight: 900;
    display: block;
    line-height: 1.1;
}

.speed-unit {
    font-size: 14px;
    font-weight: 700;
    opacity: .7;
}

.speed-info {
    font-size: 13px;
    color: rgba(255,255,255,.6);
    margin-bottom: 14px;
}

.speed-info div {
    padding: 3px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.speed-info i { font-size: 12px; color: rgba(255,255,255,.3); }
.speed-info strong { color: rgba(255,255,255,.9); }

.speed-visual-bar {
    height: 4px;
    background: rgba(255,255,255,.1);
    border-radius: 4px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: #06b6d4;
    border-radius: 4px;
    transition: width 1s ease;
}

/* CTA card inside speed grid */
.cta-card {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(217,35,21,.15), rgba(217,35,21,.05)) !important;
    border-color: rgba(217,35,21,.3) !important;
}

.cta-content {
    text-align: center;
}

.cta-content h3 {
    color: var(--white);
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 8px;
}

.cta-content p {
    color: rgba(255,255,255,.6);
    font-size: 14px;
    margin-bottom: 18px;
}

.cta-card .btn-hero-reg {
    max-width: 200px;
}

/* ==========================================================
   8. CONSULT SECTION (Bạn dùng 5G để làm gì?)
   ========================================================== */
.consult-section {
    background: var(--white);
}

.consult-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}

.consult-card {
    background: var(--gray-50);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: all var(--transition);
}

.consult-card:hover {
    border-color: var(--vt-red);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.consult-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 12px;
}

.c-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: var(--vt-red-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.c-title h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 2px;
}

.c-title span {
    font-size: 13px;
    color: var(--gray-500);
}

.consult-body {
    padding-top: 10px;
    border-top: 1px solid var(--gray-200);
}

.c-pack {
    font-size: 14px;
    color: var(--gray-600);
}

.c-pack strong {
    color: var(--vt-red);
    font-weight: 800;
}

/* ==========================================================
   9. DARK TECH ZONE & TIMELINE
   ========================================================== */
.dark-tech-zone {
    background: var(--gray-900);
    padding: 50px 0;
}

.dark-tech-zone .vt-group-title {
    color: var(--white);
}

.timeline-wrapper {
    display: flex;
    justify-content: center;
    gap: 0;
    position: relative;
    padding: 30px 0;
    flex-wrap: wrap;
}

.timeline-wrapper::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 10%;
    right: 10%;
    height: 2px;
    background: rgba(255,255,255,.1);
}

.timeline-item {
    position: relative;
    text-align: center;
    padding: 0 30px;
    z-index: 1;
}

.timeline-year {
    display: inline-block;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.15);
    color: var(--white);
    font-size: 18px;
    font-weight: 800;
    padding: 10px 22px;
    border-radius: 50px;
    margin-bottom: 14px;
}

.timeline-item.highlight .timeline-year {
    background: var(--vt-red);
    border-color: var(--vt-red);
    box-shadow: 0 0 20px rgba(217,35,21,.4);
}

.timeline-content h3 {
    color: var(--white);
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}

.timeline-content p {
    color: rgba(255,255,255,.5);
    font-size: 13px;
}

/* ==========================================================
   10. INFRASTRUCTURE SECTION
   ========================================================== */
.infra-section {
    background: var(--white);
}

.infra-header {
    text-align: center;
    margin-bottom: 40px;
}

.infra-badge {
    display: inline-block;
    background: var(--vt-red-bg);
    border: 1px solid #fecaca;
    color: var(--vt-red);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 2px;
    padding: 5px 16px;
    border-radius: 50px;
    margin-bottom: 14px;
}

.infra-title {
    font-size: clamp(22px, 3.5vw, 32px);
    font-weight: 900;
    color: var(--gray-900);
    margin-bottom: 10px;
}

.infra-desc {
    font-size: 15px;
    color: var(--gray-500);
    max-width: 650px;
    margin: 0 auto;
}

/* Stats grid */
.infra-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--gray-50);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 24px 16px;
    text-align: center;
    transition: all var(--transition);
}

.stat-card:hover {
    border-color: var(--vt-red);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.stat-icon {
    font-size: 28px;
    color: var(--vt-red);
    margin-bottom: 10px;
}

.stat-number {
    font-size: 28px;
    font-weight: 900;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 13px;
    color: var(--gray-500);
    font-weight: 500;
}

/* Infra content box */
.infra-content-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: center;
    background: var(--gray-50);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: 36px;
}

.infra-text h3 {
    font-size: 22px;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 20px;
}

.infra-list {
    list-style: none;
}

.infra-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 0;
}

.infra-list li i {
    color: var(--vt-red);
    font-size: 18px;
    margin-top: 2px;
    flex-shrink: 0;
}

.infra-info strong {
    display: block;
    font-size: 14px;
    color: var(--gray-800);
    margin-bottom: 2px;
}

.infra-info span {
    font-size: 13px;
    color: var(--gray-500);
    line-height: 1.5;
}

.infra-cta {
    margin-top: 24px;
}

.btn-infra-reg {
    display: inline-flex;
    align-items: center;
    background: linear-gradient(135deg, var(--vt-red), var(--vt-red-dark));
    color: var(--white);
    font-size: 14px;
    font-weight: 800;
    padding: 14px 32px;
    border-radius: 50px;
    transition: all var(--transition);
    box-shadow: 0 4px 15px rgba(217,35,21,.3);
}

.btn-infra-reg:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(217,35,21,.4);
}

.infra-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.infra-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

/* ==========================================================
   11. EXPAND / COLLAPSE WRAPPER
   ========================================================== */
#dieu-kien-su-dung-5g-viettel {
    background: var(--white);
}

.expand-wrapper {
    background: var(--gray-50);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-top: 20px;
}

.expand-content {
    padding: 24px;
    max-height: 200px;
    overflow: hidden;
    position: relative;
    transition: max-height .5s ease;
}

.expand-wrapper.open .expand-content {
    max-height: 3000px;
}

.expand-content::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(transparent, var(--gray-50));
    pointer-events: none;
    transition: opacity .3s;
}

.expand-wrapper.open .expand-content::after {
    opacity: 0;
}

.expand-content p {
    font-size: 15px;
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: 14px;
}

.expand-content ul {
    list-style: none;
    padding: 0;
}

.expand-content ul li {
    padding: 8px 0;
    font-size: 14px;
    color: var(--gray-700);
    line-height: 1.7;
    border-bottom: 1px solid var(--gray-200);
}

.expand-content ul li:last-child { border-bottom: none; }
.expand-content ul li strong { color: var(--gray-900); }

.expand-footer {
    text-align: center;
    padding: 12px;
    border-top: 1px solid var(--gray-200);
}

.btn-expand {
    background: none;
    border: none;
    color: var(--vt-red);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    padding: 6px 16px;
    border-radius: 50px;
    transition: all var(--transition);
}

.btn-expand:hover {
    background: var(--vt-red-bg);
}

/* ==========================================================
   12. COMPARISON TABLE
   ========================================================== */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.lookup-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.lookup-table thead tr {
    background: var(--gray-900);
}

.lookup-table thead th {
    color: var(--white);
    font-weight: 700;
    padding: 12px 16px;
    text-align: left;
	background:#0f172a!important;
    font-size: 13px;
    letter-spacing: .3px;
}

.lookup-table thead th:first-child {
    border-radius: var(--radius-sm) 0 0 0;
}

.lookup-table thead th:last-child {
    border-radius: 0 var(--radius-sm) 0 0;
}

.lookup-table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-700);
}

.lookup-table tbody tr:hover {
    background: var(--vt-red-bg);
}

.lookup-table tbody td strong {
    color: var(--gray-900);
}

.seo-article-section {
    background: var(--white);
}

.seo-article-section em {
    font-size: 13px;
    color: var(--gray-500);
}

/* ==========================================================
   13. TRUST SECTION
   ========================================================== */
.bottom-trust-section {
    background: var(--gray-50);
}

.trust-wrapper-split {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 30px;
    align-items: center;
}

.trust-image-col img {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.trust-content-col {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.trust-row {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--white);
    padding: 20px;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--gray-200);
    transition: all var(--transition);
}

.trust-row:hover {
    border-color: var(--vt-red);
    box-shadow: var(--shadow-md);
}

.trust-icon {
    flex-shrink: 0;
}

.trust-text h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.trust-text p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ==========================================================
   14. FAQ SECTION
   ========================================================== */
.seo-faq-section {
    background: var(--white);
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.faq-column {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.faq-item {
    background: var(--gray-50);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--transition);
}

.faq-item[open] {
    border-color: var(--vt-red);
}

.faq-item summary {
    padding: 14px 18px;
    font-size: 14px;
    font-weight: 700;
    color: var(--gray-800);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background var(--transition);
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
    content: '+';
    font-size: 20px;
    font-weight: 300;
    color: var(--gray-400);
    transition: transform var(--transition);
    flex-shrink: 0;
    margin-left: 10px;
}

.faq-item[open] summary::after {
    content: '−';
    color: var(--vt-red);
}

.faq-item summary:hover {
    background: var(--vt-red-bg);
}

.faq-content {
    padding: 0 18px 16px;
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.7;
    border-top: 1px solid var(--gray-200);
    padding-top: 14px;
}

.faq-content strong {
    color: var(--vt-red);
}

/* ==========================================================
   15. SEO GIỚI THIỆU CUỐI TRANG
   ========================================================== */
#gioi-thieu-cuoi-trang {
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

.seo-content {
    max-width: 800px;
    margin: 20px auto 0;
}

.seo-content p {
    font-size: 15px;
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: 16px;
}

.seo-content a {
    color: var(--vt-red);
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.seo-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 20px 0;
}

.seo-item {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--white);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 14px 18px;
}

.icon-box {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--vt-red-bg);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--vt-red);
    font-size: 18px;
}

.text-box {
    font-size: 14px;
    color: var(--gray-700);
    line-height: 1.5;
}

.text-box strong {
    color: var(--gray-900);
}

.seo-footer-text {
    text-align: center;
    font-style: italic;
    color: var(--gray-500) !important;
}

/* ==========================================================
   16. BOTTOM NAVIGATION (MOBILE APP-STYLE)
   ========================================================== */
.app-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    border-top: 1px solid var(--gray-200);
    display: none; /* only show on mobile */
    justify-content: space-around;
    padding: 8px 0 calc(8px + env(safe-area-inset-bottom));
    z-index: 200;
    box-shadow: 0 -2px 10px rgba(0,0,0,.08);
}

.app-nav-item {
    text-decoration: none !important;
    color: var(--gray-500) !important;
    font-size: 11px !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    width: 20% !important;
    transition: color var(--transition);
    gap: 2px;
}

.app-nav-item:hover,
.app-nav-item:active {
    color: var(--vt-red) !important;
}

.nav-icon {
    font-size: 20px !important;
    margin-bottom: 2px !important;
}

@media (max-width: 768px) {
    .app-bottom-nav {
        display: flex;
    }
    body {
        padding-bottom: 70px;
    }
}

/* ==========================================================
   17. RESPONSIVE
   ========================================================== */
@media (max-width: 1024px) {
    .infra-content-box {
        grid-template-columns: 1fr;
    }
    .infra-image {
        max-height: 300px;
    }
    .trust-wrapper-split {
        grid-template-columns: 1fr;
    }
    .trust-image-col {
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .tech-hero-section {
        padding: 50px 0 40px;
    }
    .featured-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: 14px;
    }
    .faq-grid {
        grid-template-columns: 1fr;
    }
    .infra-stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    .timeline-wrapper {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }
    .timeline-wrapper::before {
        display: none;
    }
    .consult-grid {
        grid-template-columns: 1fr;
    }
    .tech-section,
    .group-section,
    .consult-section,
    .seo-article-section,
    .infra-section,
    .seo-faq-section,
    .bottom-trust-section,
    #dieu-kien-su-dung-5g-viettel,
    #gioi-thieu-cuoi-trang {
        padding:0;
    }
    .infra-content-box {
        padding: 22px;
    }
}

@media (max-width: 480px) {
    .featured-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .hero-card {
        padding: 24px 16px 18px;
    }
    .infra-stats-grid {
        grid-template-columns: 1fr;
    }
    .container-seo {
        padding: 0 14px;
		text-align:justify;
    }
    .orb-val {
        font-size: 28px;
    }
    .card-orb {
        width: 95px;
        height: 95px;
    }
}

/* ==========================================================
   18. UTILITY & ANIMATION
   ========================================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Smooth scroll */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 70px;
}

/* Selection color */
::selection {
    background: rgba(217,35,21,.15);
    color: var(--vt-red-dark);
}



/* ============================================================
   5G VIETTEL — TRANG CHI TIẾT GÓI CƯỚC
   File riêng, dùng kèm style-5gviettel.css (kế thừa biến CSS)
   ============================================================ */

/* ---------- Shared Variables (fallback nếu dùng độc lập) ---------- */
:root {
    --vt-red: #d92315;
    --vt-red-dark: #b71c1c;
    --vt-red-light: #ff5252;
    --vt-red-bg: #fef2f2;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,.12);
    --transition: .3s ease;
    /* Accent cho trang detail */
    --accent-cyan: #38bdf8;
    --accent-purple: #a855f7;
}

/* ==========================================================
   0. INTRO H1 — Tiêu đề chính bài viết chi tiết
   ========================================================== */
#sec-intro-h1 {
    background: linear-gradient(160deg, var(--gray-900) 0%, #1a0a0a 60%, var(--vt-red-dark) 100%);
    padding: 50px 20px 0;
    text-align: center;
}

/* Override hoàn toàn style homepage — bỏ gradient text, bỏ italic */
#sec-intro-h1 .main-title {
    max-width: 820px;
    margin: 0 auto;
    font-size: clamp(21px, 3.5vw, 32px);
    font-weight: 800;
    font-style: normal;
    line-height: 1.35;
	padding-bottom:15px;
    color: var(--white) !important;
    letter-spacing: -.3px;
    /* Reset gradient text từ homepage */
    background: none !important;
    -webkit-background-clip: unset !important;
    -webkit-text-fill-color: var(--white) !important;
    background-clip: unset !important;
}

/* ==========================================================
   1. HERO SPEC — Thẻ HUD giới thiệu gói
   Nối liền mạch với H1 (cùng gradient nền, không gap)
   ========================================================== */
#hero-spec {
    background: linear-gradient(160deg, var(--gray-900) 0%, #1a0a0a 60%, var(--vt-red-dark) 100%);
    padding: 28px 0 44px;
    overflow: hidden;
}

.hero-hud-card {
    max-width: 820px;
    margin: 0 auto;
    padding: 30px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    position: relative;
    /* Viền gradient phía trên */
    overflow: hidden;
}

.hero-hud-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--vt-red), var(--accent-cyan), var(--accent-purple));
}

/* — Left side — */
.hud-left {
    flex: 1;
    min-width: 0;
}

.hud-badge {
    display: inline-block;
    background: rgba(217,35,21,.15);
    border: 1px solid rgba(217,35,21,.35);
    color: #FFF;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 50px;
    margin-bottom: 10px;
}

.hud-title {
    font-size: clamp(24px, 4vw, 34px);
    font-weight: 900;
    color: var(--white);
    letter-spacing: -.5px;
    margin-bottom: 14px;
}

.hud-price-box {
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.price-val {
    font-size: clamp(28px, 5vw, 40px);
    font-weight: 900;
    background: linear-gradient(90deg, #ff6b6b, #ffd54f);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.price-cycle {
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-400);
}

/* — Right side (Orb) — */
.hud-right {
    flex-shrink: 0;
    text-align: center;
}

.orb-wrapper {
    position: relative;
    width: 130px;
    height: 130px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.orb-wrapper .orb-ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 3px solid var(--accent-cyan);
    opacity: .3;
    animation: orbPulseDetail 3s ease-in-out infinite;
}

@keyframes orbPulseDetail {
    0%, 100% { transform: scale(1); opacity: .3; }
    50% { transform: scale(1.08); opacity: .55; }
}

.orb-wrapper .orb-ring::after {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    border: 1px solid rgba(56,189,248,.1);
}

.orb-data {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1;
    position: relative;
    z-index: 1;
}

.orb-data .val {
    font-size: 40px;
    font-weight: 900;
    color: var(--white);
}

.orb-data .unit {
    font-size: 14px;
    font-weight: 700;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.orb-caption {
    font-size: 13px;
    color: var(--gray-400);
    line-height: 1.5;
}

.orb-caption strong {
    font-size: 16px;
}

/* — SEO Sapo — */
.seo-sapo {
    max-width: 820px;
    margin: 24px auto 0;
    padding: 20px 32px;
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.06);
    border-radius: var(--radius-md);
	text-align:justify;
}

.seo-sapo p {
    font-size: 14.5px;
    line-height: 1.8;
    color: rgba(255,255,255,.55);
    margin: 0;
}

.seo-sapo strong {
    color: rgba(255,255,255,.85);
}

/* ==========================================================
   2. SECTION HEADING — Glitch Style
   ========================================================== */
.section-glitch {
    text-align: center;
    font-size: clamp(20px, 3vw, 26px);
    font-weight: 900;
    color: var(--gray-900);
    letter-spacing: 1px;
    margin-bottom: 30px;
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-glitch::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background: var(--vt-red);
    border-radius: 3px;
    margin: 10px auto 0;
}

/* ==========================================================
   3. TECH SPECS — Grid thông số kỹ thuật
   ========================================================== */
#tech-specs {
    max-width: 820px;
    margin: 0 auto;
    padding: 50px 20px;
}

.spec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.spec-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--white);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: all var(--transition);
}

.spec-card:hover {
    border-color: var(--accent-cyan);
    box-shadow: var(--shadow-md), 0 0 0 1px rgba(56,189,248,.08);
    transform: translateY(-3px);
}

.spec-card.warning-card {
    border-color: #fde68a;
    background: #fffbeb;
}

.spec-card.warning-card:hover {
    border-color: #f59e0b;
    box-shadow: var(--shadow-md), 0 0 0 1px rgba(245,158,11,.1);
}

.spec-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--vt-red);
}

.spec-card.warning-card .spec-icon {
    background: #fef3c7;
    color: #d97706;
}

.spec-info h3 {
    font-size: 14px;
    font-weight: 800;
    color: var(--gray-800);
    margin-bottom: 2px;
}

.spec-info p {
    font-size: 16px;
    font-weight: 700;
    color: var(--vt-red);
    margin-bottom: 1px;
}

.spec-info small {
    font-size: 12px;
    color: var(--gray-500);
}

/* ==========================================================
   4. VS MODE — So sánh hiệu năng
   ========================================================== */
#vs-mode {
    max-width: 820px;
    margin: 0 auto;
    padding: 50px 20px;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
}

.vs-container {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.vs-row {
    background: var(--white);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 18px 22px;
    transition: all var(--transition);
}

.vs-row.winner {
    background: var(--gray-900);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 20px rgba(56,189,248,.12), 0 4px 15px rgba(0,0,0,.15);
}

.vs-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.vs-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-700);
}

.vs-num {
    font-size: 16px;
    font-weight: 800;
    color: var(--gray-800);
}

.vs-track {
    height: 8px;
    background: var(--gray-100);
    border-radius: 8px;
    overflow: hidden;
}

.vs-row.winner .vs-track {
    background: rgba(255,255,255,.1);
}

.vs-fill {
    height: 100%;
    border-radius: 8px;
    transition: width 1.2s cubic-bezier(.4, 0, .2, 1);
}

/* ==========================================================
   5. TRẢI NGHIỆM 5G — Content section
   ========================================================== */
#trai-nghiem-5g {
    max-width: 820px;
    margin: 0 auto;
    padding: 50px 20px;
}

#trai-nghiem-5g h2 {
    font-size: clamp(20px, 3vw, 24px);
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 12px;
    line-height: 1.4;
}

#trai-nghiem-5g > p {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 24px;
}

#trai-nghiem-5g ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

#trai-nghiem-5g ul li {
    background: var(--white);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    transition: all var(--transition);
}

#trai-nghiem-5g ul li:hover {
    border-color: var(--vt-red);
    box-shadow: var(--shadow-sm);
    transform: translateX(4px);
}

.feature-text strong {
    display: block;
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 3px;
}

.feature-text span {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ==========================================================
   6. DEPLOY — Cách đăng ký
   ========================================================== */
#deploy-simple {
    max-width: 820px;
    margin: 0 auto;
    padding: 50px 20px;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

.simple-reg-box {
    max-width: 550px;
    margin: 0 auto;
    text-align: center;
}

.guide-text {
    font-size: 15px;
    color: var(--gray-600);
    margin-bottom: 20px;
}

.syntax-display-area {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: var(--white);
    border: 2px dashed var(--vt-red);
    border-radius: var(--radius-md);
    padding: 18px 24px;
    margin-bottom: 18px;
}

.syntax-big {
    font-size: clamp(22px, 4vw, 30px);
    font-weight: 900;
    color: var(--vt-red);
    letter-spacing: 2px;
    font-family: 'Courier New', monospace;
}

.btn-copy-simple {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: var(--gray-100);
    border: 1.5px solid var(--gray-300);
    border-radius: var(--radius-sm);
    padding: 8px 14px;
    font-size: 12px;
    font-weight: 700;
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-copy-simple:hover {
    background: var(--vt-red-bg);
    border-color: var(--vt-red);
    color: var(--vt-red);
}

.btn-copy-simple:active {
    transform: scale(.95);
}

.send-instruction {
    font-size: 15px;
    color: var(--gray-600);
    margin-bottom: 22px;
}

.hot-num {
    font-size: 20px;
    font-weight: 900;
    color: var(--vt-red);
}

.note {
    font-size: 12px;
    color: var(--gray-400);
}

/* CTA full-width */
.btn-reg-v2 {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--vt-red), var(--vt-red-dark));
    color: var(--white);
    font-size: 15px;
    font-weight: 800;
    letter-spacing: .5px;
    padding: 16px 28px;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 4px 18px rgba(217,35,21,.35);
}

.btn-reg-v2:hover {
    background: linear-gradient(135deg, var(--vt-red-light), var(--vt-red));
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(217,35,21,.45);
}

.btn-reg-v2.full-width {
    width: 100%;
    max-width: 400px;
}

/* ==========================================================
   7. XỬ LÝ LỖI — Khắc phục không ĐK được
   ========================================================== */
#xu-ly-loi {
    max-width: 820px;
    margin: 0 auto;
    padding: 50px 20px;
}

#xu-ly-loi h2 {
    font-size: clamp(20px, 3vw, 24px);
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 12px;
}

#xu-ly-loi > p {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 18px;
}

/* List check (tích xanh) */
.list-check {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 30px;
}

.list-check li {
    position: relative;
    padding-left: 28px;
    font-size: 14px;
    color: var(--gray-700);
    line-height: 1.7;
}

.list-check li::before {
    content: '\f06a'; /* fa-circle-exclamation */
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 2px;
    color: #f59e0b;
    font-size: 16px;
}

.list-check li strong {
    color: var(--gray-900);
}

/* VT Highlight Box — Giải pháp thay thế */
.vt-highlight {
    background: linear-gradient(135deg, #fef2f2, #fff7ed);
    border: 2px solid var(--vt-red);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
}

.vt-highlight h3 {
    font-size: 17px;
    font-weight: 900;
    color: var(--vt-red);
    text-align: center;
    margin-bottom: 14px;
    letter-spacing: .3px;
}

.vt-highlight > p {
    font-size: 14px;
    color: var(--gray-700);
    line-height: 1.7;
    margin-bottom: 16px;
}

.vt-highlight a {
    color: var(--vt-red);
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* Benefit check list */
.benefit-check-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}

.benefit-check-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: var(--gray-700);
    line-height: 1.5;
}

.check-icon {
    flex-shrink: 0;
    font-size: 16px;
    line-height: 1.4;
}

.list-text-wrapper {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.list-text-wrapper strong {
    color: var(--gray-900);
    font-size: 14px;
}

.list-text-wrapper span {
    font-size: 13px;
    color: var(--gray-500);
}

/* Copy syntax box (inline) */
.copy-syntax-box {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--white);
    border: 2px dashed var(--vt-red);
    border-radius: var(--radius-sm);
    padding: 12px 18px;
    max-width: 300px;
}

.syntax-text {
    font-family: 'Courier New', monospace;
    font-size: 18px;
    font-weight: 900;
    color: var(--vt-red);
    letter-spacing: 1.5px;
}

.btn-copy {
    background: var(--vt-red);
    color: var(--white);
    font-size: 12px;
    font-weight: 700;
    padding: 6px 14px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-copy:hover {
    background: var(--vt-red-dark);
    transform: scale(1.05);
}

.btn-copy:active {
    transform: scale(.95);
}

/* ==========================================================
   8. FAQ — Trang detail (kế thừa từ main nếu dùng chung)
   ========================================================== */
/* Heading SEO riêng */
.seo-heading {
    text-align: center;
    font-size: clamp(20px, 3vw, 26px);
    font-weight: 900;
    color: var(--gray-900);
    margin-bottom: 30px;
    letter-spacing: .5px;
}

.seo-heading::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background: var(--vt-red);
    border-radius: 3px;
    margin: 10px auto 0;
}

/* ==========================================================
   9. KẾT LUẬN — CTA cuối bài
   ========================================================== */
#ket-luan {
    max-width: 820px;
    margin: 0 auto;
    padding: 50px 20px;
}

.vt-conclusion-box {
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

/* Header */
.vt-concl-header {
    background: var(--gray-900);
    padding: 24px 28px;
    text-align: center;
}

.icon-wrapper {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #f59e0b, #fbbf24);
    border-radius: 50%;
    margin-bottom: 10px;
}

.icon-wrapper i {
    font-size: 22px;
    color: var(--gray-900);
}

.vt-concl-header h3 {
    font-size: 18px;
    font-weight: 900;
    color: var(--white);
    letter-spacing: 1px;
}

/* Body */
.vt-concl-body {
    padding: 28px;
}

.vt-concl-body > p {
    font-size: 15px;
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: 20px;
}

/* Highlight box bên trong */
.vt-highlight-box {
    background: var(--vt-red-bg);
    border: 1.5px solid #fecaca;
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 18px;
}

.vt-highlight-box > p {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 14px;
}

.highlight-price {
    font-size: 20px;
    font-weight: 900;
    color: var(--vt-red);
}

/* VT Check List */
.vt-check-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.vt-check-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.vt-check-list li > i {
    flex-shrink: 0;
    font-size: 18px;
    color: #22c55e;
    margin-top: 1px;
}

.vt-check-list .list-text-wrapper strong {
    font-size: 14px;
    color: var(--gray-900);
}

.vt-check-list .list-text-wrapper span {
    font-size: 13px;
    color: var(--gray-500);
}

.concl-note {
    font-size: 14px;
    color: var(--gray-500);
    font-style: italic;
    text-align: center;
}

/* Footer CTA */
.vt-concl-footer {
    text-align: center;
    padding: 28px;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

.vt-concl-footer > p {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-600);
    margin-bottom: 16px;
}

.btn-concl-cta {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--vt-red), var(--vt-red-dark));
    color: var(--white);
    font-size: 16px;
    font-weight: 900;
    letter-spacing: .8px;
    padding: 16px 40px;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 6px 24px rgba(217,35,21,.35);
    overflow: hidden;
}

.btn-concl-cta:hover {
    background: linear-gradient(135deg, var(--vt-red-light), var(--vt-red));
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 30px rgba(217,35,21,.45);
}

/* Pulse ring animation */
.pulse-ring {
    position: absolute;
    inset: -4px;
    border: 2px solid var(--vt-red);
    border-radius: 50px;
    animation: pulseRing 2s ease-out infinite;
    pointer-events: none;
}

@keyframes pulseRing {
    0% { transform: scale(1); opacity: .6; }
    100% { transform: scale(1.15); opacity: 0; }
}

.vt-concl-footer small {
    display: block;
    margin-top: 12px;
    font-size: 12px;
    color: var(--gray-400);
}

/* ==========================================================
   10. RESPONSIVE — Trang chi tiết
   ========================================================== */
@media (max-width: 768px) {
    .hero-hud-card {
        flex-direction: column;
        text-align: center;
        padding: 28px 22px;
        gap: 20px;
    }

    .hud-price-box {
        justify-content: center;
    }

    #sec-intro-h1 {
        padding: 35px 16px 0;
    }

    .seo-sapo {
        padding: 16px 18px;
        margin-left: 16px;
        margin-right: 16px;
    }

    #tech-specs,
    #vs-mode,
    #trai-nghiem-5g,
    #deploy-simple,
    #xu-ly-loi,
    #ket-luan {
        padding: 35px 16px;
    }

    .spec-grid {
        grid-template-columns: 1fr;
    }

    .syntax-display-area {
        flex-direction: column;
        gap: 10px;
        padding: 16px;
    }

    .copy-syntax-box {
        max-width: 100%;
    }

    .vt-concl-body {
        padding: 22px 18px;
    }

    .vt-concl-footer {
        padding: 22px 18px;
    }

    .btn-concl-cta {
        width: 100%;
        max-width: 320px;
        padding: 14px 28px;
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    #hero-spec {
        padding: 35px 0 30px;
    }

    .hero-hud-card {
        margin: 0 14px;
        padding: 22px 16px;
    }

    .orb-wrapper {
        width: 110px;
        height: 110px;
    }

    .orb-data .val {
        font-size: 34px;
    }

    .vt-highlight {
        padding: 22px 16px;
    }

    .vt-highlight-box {
        padding: 16px;
    }
}



/* ============================================================
   5G VIETTEL — NAVBAR / MAIN MENU
   Tách riêng — copy bổ sung vào project
   Tone: Trắng · Đỏ Viettel (#d92315) · Xám
   ============================================================ */

/* ---------- WRAPPER NGOÀI ---------- */
.t3-navbar {
    background: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    box-shadow: 0 1px 4px rgba(0,0,0,.06);
    position: sticky;
    top: 0;
    z-index: 1000;
}

/* ---------- MEGAMENU CONTAINER ---------- */
.t3-megamenu {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- NAV LIST ---------- */
.t3-megamenu ul.nav.navbar-nav.level0 {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0;
    margin: 0;
    padding: 0;
    list-style: none;
}

/* ---------- NAV ITEM ---------- */
.t3-megamenu ul.nav.navbar-nav.level0 > li {
    position: relative;
}

/* ---------- NAV LINK ---------- */
.t3-megamenu ul.nav.navbar-nav.level0 > li > a {
    display: block;
    padding: 14px 16px;
    font-size: 14px;
    font-weight: 600;
    color: #334155;
    text-decoration: none;
    white-space: nowrap;
    transition: color .25s ease, background .25s ease;
    position: relative;
	text-transform:uppercase;
}


/* Gạch đỏ dưới — ẩn mặc định */
.t3-megamenu ul.nav.navbar-nav.level0 > li > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2.5px;
    background: #d92315;
    border-radius: 2px;
    transition: width .3s ease;
}

/* ---------- HOVER ---------- */
.t3-megamenu ul.nav.navbar-nav.level0 > li > a:hover {
    color: #d92315;
    background: #fef2f2;
}

.t3-megamenu ul.nav.navbar-nav.level0 > li > a:hover::after {
    width: 60%;
}

/* ---------- ACTIVE / CURRENT ---------- */
.t3-megamenu ul.nav.navbar-nav.level0 > li.active > a,
.t3-megamenu ul.nav.navbar-nav.level0 > li.current > a {
    color: #d92315;
    font-weight: 700;
}

.t3-megamenu ul.nav.navbar-nav.level0 > li.active > a::after,
.t3-megamenu ul.nav.navbar-nav.level0 > li.current > a::after {
    width: 60%;
}

/* ---------- RESPONSIVE: TABLET ---------- */
@media (max-width: 1024px) {
    .t3-megamenu ul.nav.navbar-nav.level0 > li > a {
        padding: 12px 12px;
        font-size: 13px;
    }
}

/* ---------- RESPONSIVE: MOBILE ---------- */
@media (max-width: 768px) {
    .t3-navbar {
        position: relative;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .t3-megamenu ul.nav.navbar-nav.level0 {
        justify-content: flex-start;
        flex-wrap: nowrap;
        gap: 0;
        /* Scroll ngang trên mobile */
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;        /* Firefox */
        -ms-overflow-style: none;     /* IE/Edge */
    }

    .t3-megamenu ul.nav.navbar-nav.level0::-webkit-scrollbar {
        display: none;                /* Chrome/Safari */
    }

    .t3-megamenu ul.nav.navbar-nav.level0 > li > a {
        padding: 11px 14px;
        font-size: 13px;
    }
}




/* ---------- MENU LIST ---------- */
.t3-off-canvas-body ul.nav.menu.mod-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
}

/* ---------- MENU ITEM ---------- */
.t3-off-canvas-body ul.nav.menu.mod-list > li {
    border-bottom: 1px solid #f1f5f9;
}

.t3-off-canvas-body ul.nav.menu.mod-list > li:last-child {
    border-bottom: none;
}

/* ---------- MENU LINK ---------- */
.t3-off-canvas-body ul.nav.menu.mod-list > li > a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    font-size: 14.5px;
    font-weight: 600;
    color: #334155;
    text-decoration: none;
    transition: all .25s ease;
    position: relative;
}

/* Viền trái active indicator */
.t3-off-canvas-body ul.nav.menu.mod-list > li > a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 60%;
    background: #d92315;
    border-radius: 0 3px 3px 0;
    transition: width .25s ease;
}

/* ---------- ICON cho từng mục (Font Awesome 6.4 Free) ---------- */
.t3-off-canvas-body ul.nav.menu.mod-list > li > a::after {
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 16px;
    width: 22px;
    text-align: center;
    flex-shrink: 0;
    order: -1;          /* Đưa icon ra trước text */
    color: #94a3b8;
    transition: color .25s ease;
}

/* Icon cho từng item theo class Joomla */
.t3-off-canvas-body li.item-101 > a::after  { content: '\f015'; }  /* fa-house */
.t3-off-canvas-body li.item-335 > a::after  { content: '\f1eb'; }  /* fa-wifi */
.t3-off-canvas-body li.item-337 > a::after  { content: '\f5fd'; }  /* fa-layer-group */
.t3-off-canvas-body li.item-338 > a::after  { content: '\e473'; }  /* fa-hashtag / share-nodes */
.t3-off-canvas-body li.item-336 > a::after  { content: '\f11b'; }  /* fa-gamepad */
.t3-off-canvas-body li.item-339 > a::after  { content: '\f783'; }  /* fa-calendar-day */
.t3-off-canvas-body li.item-357 > a::after  { content: '\f073'; }  /* fa-calendar-days */
.t3-off-canvas-body li.item-371 > a::after  { content: '\f012'; }  /* fa-signal */

/* ---------- HOVER ---------- */
.t3-off-canvas-body ul.nav.menu.mod-list > li > a:hover {
    color: #d92315;
    background: #fef2f2;
    padding-left: 24px;
}

.t3-off-canvas-body ul.nav.menu.mod-list > li > a:hover::before {
    width: 3px;
}

.t3-off-canvas-body ul.nav.menu.mod-list > li > a:hover::after {
    color: #d92315;
}

/* ---------- ACTIVE / CURRENT ---------- */
.t3-off-canvas-body ul.nav.menu.mod-list > li.active > a,
.t3-off-canvas-body ul.nav.menu.mod-list > li.current > a {
    color: #d92315;
    font-weight: 700;
    background: #fef2f2;
    padding-left: 24px;
}

.t3-off-canvas-body ul.nav.menu.mod-list > li.active > a::before,
.t3-off-canvas-body ul.nav.menu.mod-list > li.current > a::before {
    width: 3px;
}

.t3-off-canvas-body ul.nav.menu.mod-list > li.active > a::after,
.t3-off-canvas-body ul.nav.menu.mod-list > li.current > a::after {
    color: #d92315;
}

/* ---------- CLOSE BUTTON (nếu có) ---------- */
.t3-off-canvas .off-canvas-close,
.t3-off-canvas .btn-close-canvas {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    color: #64748b;
    font-size: 18px;
    cursor: pointer;
    transition: all .25s ease;
    z-index: 10;
}

.t3-off-canvas .off-canvas-close:hover,
.t3-off-canvas .btn-close-canvas:hover {
    background: #fef2f2;
    border-color: #fecaca;
    color: #d92315;
}

/* ---------- HAMBURGER TOGGLE (nút mở menu) ---------- */
.t3-off-canvas-toggle,
.btn-navbar {
    display: none;
}

@media (max-width: 768px) {
    .t3-off-canvas-toggle,
    .btn-navbar {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: none;
        border: 1.5px solid #e2e8f0;
        border-radius: 8px;
        color: #334155;
        font-size: 18px;
        cursor: pointer;
        transition: all .25s ease;
    }

    .t3-off-canvas-toggle:hover,
    .btn-navbar:hover {
        border-color: #d92315;
        color: #d92315;
        background: #fef2f2;
    }
}



/* ============================================================
   5G VIETTEL — BỔ SUNG CHI TIẾT (EXTRA)
   Chỉ chứa class CHƯA có trong 3 file CSS chính.
   Copy thêm vào project khi cần.
   ============================================================ */

/* ==========================================================
   1. SECTION CARD ĐƠN LẺ (#sec-intro-sd125t)
   Dùng cho bài viết có 1 card gói cước nổi bật giữa trang
   ========================================================== */
#sec-intro-sd125t {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 0 20px 40px;
    margin-top: -15px;
    position: relative;
    z-index: 2;
}

/* Card bên trong — override card-v2 cho phù hợp ngữ cảnh đơn lẻ */
#sec-intro-sd125t .card-v2 {
    max-width: 400px;
    width: 100%;
    margin: 0;
    border-radius: 16px;
    border: 1.5px solid #e2e8f0;
    background: #ffffff;
    padding: 28px 22px 22px;
    position: relative;
}

/* Danh sách check bên trong card */
#sec-intro-sd125t .vt-check-list {
    text-align: left;
    margin-bottom: 18px;
    padding: 0 4px;
}

#sec-intro-sd125t .vt-check-list li {
    padding: 6px 0;
}

/* Link cú pháp phía dưới nút */
#sec-intro-sd125t .link-detail-bottom {
    margin-top: 8px;
    font-size: 13px;
}

@media (max-width: 480px) {
    #sec-intro-sd125t {
        padding: 0 14px 30px;
        gap: 16px;
    }

    #sec-intro-sd125t .card-v2 {
        max-width: 100%;
        padding: 24px 16px 18px;
    }
}

/* ==========================================================
   2. BẢNG SO SÁNH CHU KỲ DÀI (#chu-ky-dai)
   ========================================================== */
#chu-ky-dai {
    max-width: 820px;
    margin: 0 auto;
    padding: 50px 20px;
}

#chu-ky-dai h2 {
    font-size: clamp(20px, 3vw, 24px);
    font-weight: 800;
    color: #1e293b;
    text-align: center;
    margin-bottom: 24px;
}

/* Wrapper bảng */
.vd-compare-box {
    background: #ffffff;
    border: 1.5px solid #e2e8f0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,.06);
}

/* Bảng */
.vd-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.vd-table thead tr {
    background: #0f172a;
}

.vd-table thead th {
    color: #ffffff;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .3px;
    padding: 13px 16px;
    text-align: left;
    white-space: nowrap;
	    background: var(--gray-900) !important;
}

.vd-table thead th:first-child {
    border-radius: 12px 0 0 0;
}

.vd-table thead th:last-child {
    border-radius: 0 12px 0 0;
    text-align: center;
}

.vd-table tbody td {
    padding: 14px 16px;
    color: #334155;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
}

.vd-table tbody td:last-child {
    text-align: center;
}

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

.vd-table tbody tr:hover {
    background: #f8fafc;
}

.vd-table tbody td strong {
    color: #1e293b;
    font-weight: 700;
}

/* ---------- NÚT CHỌN TRONG BẢNG ---------- */
.vd-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #d92315, #b71c1c);
    color: #ffffff;
    font-size: 12.5px;
    font-weight: 700;
    letter-spacing: .3px;
    padding: 8px 20px;
    border-radius: 50px;
    border: none;
    text-decoration: none;
    cursor: pointer;
    transition: all .25s ease;
    box-shadow: 0 2px 8px rgba(217,35,21,.25);
    white-space: nowrap;
}

.vd-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(217,35,21,.35);
    background: linear-gradient(135deg, #ff5252, #d92315);
}

.vd-btn:active {
    transform: scale(.97);
}

.vd-btn-sm {
    padding: 7px 16px;
    font-size: 12px;
}

/* Responsive bảng */
@media (max-width: 768px) {
    #chu-ky-dai {
        padding: 35px 16px;
    }

    .vd-compare-box {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .vd-table {
        min-width: 440px;
    }

    .vd-table thead th,
    .vd-table tbody td {
        padding: 11px 12px;
        font-size: 13px;
    }

    .vd-btn-sm {
        padding: 6px 14px;
        font-size: 11px;
    }
}

/* ==========================================================
   3. REVEAL ON SCROLL — Animation khi cuộn
   ========================================================== */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .6s ease, transform .6s ease;
}

.reveal-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* JS snippet cần thêm vào page (gợi ý):
   -----------------------------------------------
   const observer = new IntersectionObserver((entries) => {
       entries.forEach(e => {
           if (e.isIntersecting) e.target.classList.add('is-visible');
       });
   }, { threshold: 0.15 });
   document.querySelectorAll('.reveal-on-scroll').forEach(el => observer.observe(el));
   -----------------------------------------------
*/

/* ==========================================================
   0. CARD-V2 STANDALONE
   Khi .card-v2 được dùng ĐỘC LẬP (không có .hero-card),
   cần bộ style base đầy đủ. Trong file chính, base nằm
   trên .hero-card nên .card-v2 đơn lẻ sẽ thiếu layout.
   ========================================================== */
.card-v2:not(.hero-card) {
    position: relative;
    background: #ffffff;
    border-radius: 16px;
    border: 1.5px solid #e2e8f0;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 32px 22px 22px;
    text-align: center;
    transition: all .3s ease;
    overflow: hidden;
}
 
.card-v2:not(.hero-card):hover {
    box-shadow: 0 8px 30px rgba(0,0,0,.12);
    transform: translateY(-3px);
}
 
/* Badge bên trong card standalone */
.card-v2:not(.hero-card) .card-badge {
    position: absolute;
    top: 0;
    right: 0;
    font-size: 10.5px;
    font-weight: 800;
    letter-spacing: .6px;
    padding: 5px 14px 5px 16px;
    border-radius: 0 16px 0 10px;
    z-index: 5;
    text-transform: uppercase;
    line-height: 1.3;
    box-shadow: -2px 2px 6px rgba(0,0,0,.12);
}
 
/* Orb bên trong card standalone */
.card-v2:not(.hero-card) .card-orb {
    position: relative;
    width: 110px;
    height: 110px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 5px auto 15px;
}
 
.card-v2:not(.hero-card) .orb-ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 3px solid currentColor;
    opacity: .25;
    animation: orbPulse 3s ease-in-out infinite;
}
 
.card-v2:not(.hero-card) .orb-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1;
}
 
.card-v2:not(.hero-card) .orb-val {
    font-size: 32px;
    font-weight: 900;
    color: #1e293b;
}
 
.card-v2:not(.hero-card) .orb-unit {
    font-size: 13px;
    font-weight: 700;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 1px;
}
 
/* Price */
.card-v2:not(.hero-card) .pkg-name {
    font-size: 26px;
    font-weight: 900;
    color: #1e293b;
    margin-bottom: 4px;
}
 
.card-v2:not(.hero-card) .pkg-price {
    font-size: 24px;
    font-weight: 800;
}
 
.card-v2:not(.hero-card) .pkg-price .cycle {
    font-size: 13px;
    font-weight: 500;
    color: #94a3b8;
}
 
/* Daily data chip */
.card-v2:not(.hero-card) .daily-data {
    font-size: 14px;
    font-weight: 700;
    padding: 6px 16px;
    border-radius: 50px;
    display: inline-block;
}
 
/* Check list bên trong card */
.card-v2:not(.hero-card) .vt-check-list {
    width: 100%;
    text-align: left;
    margin-bottom: 18px;
    padding: 0 4px;
    list-style: none;
}
 
.card-v2:not(.hero-card) .vt-check-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 7px 0;
}
 
.card-v2:not(.hero-card) .vt-check-list li > i {
    flex-shrink: 0;
    font-size: 16px;
    margin-top: 2px;
}
 
.card-v2:not(.hero-card) .list-text-wrapper {
    display: flex;
    flex-direction: column;
    gap: 1px;
}
 
.card-v2:not(.hero-card) .list-text-wrapper strong {
    font-size: 14px;
    color: #1e293b;
}
 
.card-v2:not(.hero-card) .list-text-wrapper span {
    font-size: 13px;
    color: #64748b;
    line-height: 1.5;
}
 
/* CTA button */
.card-v2:not(.hero-card) .btn-hero-reg {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 260px;
    font-size: 13.5px;
    font-weight: 800;
    letter-spacing: .5px;
    padding: 13px 20px;
    border-radius: 50px;
    color: #ffffff;
    text-decoration: none;
    transition: all .3s ease;
    position: relative;
    z-index: 3;
}
 
.card-v2:not(.hero-card) .btn-hero-reg:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
}
 
/* Detail link */
.card-v2:not(.hero-card) .link-detail-bottom {
    display: block;
    margin-top: 10px;
    font-size: 13px;
    font-weight: 600;
    z-index: 3;
    position: relative;
    transition: opacity .25s ease;
}
 
.card-v2:not(.hero-card) .link-detail-bottom:hover {
    opacity: .75;
}
 
/* Responsive */
@media (max-width: 480px) {
    .card-v2:not(.hero-card) {
        padding: 26px 16px 18px;
    }
 
    .card-v2:not(.hero-card) .pkg-name {
        font-size: 22px;
    }
 
    .card-v2:not(.hero-card) .pkg-price {
        font-size: 20px;
    }
 
    .card-v2:not(.hero-card) .card-orb {
        width: 95px;
        height: 95px;
    }
 
    .card-v2:not(.hero-card) .orb-val {
        font-size: 28px;
    }
}
 
 
/* ============================================================
   5G VIETTEL — FOOTER
   Tách riêng — Tone: Tối (#0f172a) · Đỏ Viettel · Xám nhạt
   Icon: Font Awesome 6.4 Free
   ============================================================ */

/* ---------- WRAPPER ---------- */
.vt-footer {
    background: #0f172a;
    color: #94a3b8;
    font-size: 14px;
    line-height: 1.6;
    padding: 0;
    margin-top: 0;
}

.vt-footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 24px 0;
}

/* ==========================================================
   1. FOOTER GRID — 4 cột trên PC
   ========================================================== */
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 36px;
}

/* ==========================================================
   2. CỘT BRAND
   ========================================================== */
.footer-brand-col {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-logo-link {
    display: inline-block;
}

.footer-logo {
    max-height: 44px;
    width: auto;
}

.footer-tagline {
    font-size: 13.5px;
    color: #94a3b8;
    line-height: 1.6;
}

.footer-tagline strong {
    color: #e2e8f0;
}

/* --- Contact --- */
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 4px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-item > i {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(217,35,21,.12);
    border-radius: 8px;
    color: #ff6b6b;
    font-size: 14px;
    flex-shrink: 0;
}

.contact-label {
    display: block;
    font-size: 11px;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: .5px;
    line-height: 1.2;
}

.contact-hotline {
    font-size: 18px;
    font-weight: 900;
    color: #ff4d4d;
    text-decoration: none;
    letter-spacing: .5px;
    transition: color .25s ease;
}

.contact-hotline:hover {
    color: #ff8a80;
}

.contact-item strong {
    color: #e2e8f0;
    font-size: 14px;
}

.contact-free {
    font-size: 12px;
    color: #64748b;
}

/* --- Trust Badges --- */
.footer-trust-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 4px;
}

.trust-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.08);
    color: #64748b;
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 50px;
    letter-spacing: .3px;
}

.trust-chip i {
    font-size: 10px;
    color: #22c55e;
}

/* ==========================================================
   3. CỘT NAV — Accordion
   ========================================================== */
.footer-nav-col {
    min-width: 0;
}

.footer-accordion {
    border: none;
}

.footer-accordion summary {
    list-style: none;
    cursor: default;
}

.footer-accordion summary::-webkit-details-marker {
    display: none;
}

.footer-nav-title {
    font-size: 13px;
    font-weight: 800;
    color: #e2e8f0;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding-bottom: 14px;
    margin-bottom: 4px;
    border-bottom: 2px solid rgba(217,35,21,.4);
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-nav-title i {
    font-size: 14px;
    color: #d92315;
}

/* Nav list */
.footer-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.footer-nav-list li {
    border-bottom: 1px solid rgba(255,255,255,.04);
}

.footer-nav-list li:last-child {
    border-bottom: none;
}

.footer-nav-list a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 9px 0;
    font-size: 13.5px;
    color: #94a3b8;
    text-decoration: none;
    transition: all .25s ease;
}

.footer-nav-list a:hover {
    color: #ffffff;
    padding-left: 6px;
}

/* Pkg tag (HOT, DATA+, VIP) */
.pkg-tag {
    display: inline-block;
    font-size: 9px;
    font-weight: 800;
    letter-spacing: .5px;
    text-transform: uppercase;
    padding: 2px 6px;
    border-radius: 3px;
    line-height: 1.3;
    flex-shrink: 0;
}

.pkg-tag.hot {
    background: rgba(239,68,68,.2);
    color: #ff6b6b;
    border: 1px solid rgba(239,68,68,.3);
}

.pkg-tag.data {
    background: rgba(168,85,247,.15);
    color: #c084fc;
    border: 1px solid rgba(168,85,247,.25);
}

.pkg-tag.vip {
    background: rgba(245,158,11,.15);
    color: #fbbf24;
    border: 1px solid rgba(245,158,11,.25);
}

/* Pkg meta (dung luong) */
.pkg-meta {
    margin-left: auto;
    font-size: 11.5px;
    color: #475569;
    font-weight: 500;
}

/* ==========================================================
   4. FOOTER BOTTOM — Copyright
   ========================================================== */
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.06);
    margin-top: 36px;
    padding: 20px 0 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 12.5px;
    color: #475569;
    margin-bottom: 4px;
}

.footer-bottom strong {
    color: #94a3b8;
}

.footer-copy {
    font-size: 11.5px;
    color: #334155;
}

/* ==========================================================
   5. RESPONSIVE
   ========================================================== */

/* --- Tablet --- */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }

    .footer-brand-col {
        grid-column: 1 / -1;
    }
}

/* --- Mobile --- */
@media (max-width: 768px) {
    .vt-footer-inner {
        padding: 36px 16px 0;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .footer-brand-col {
        padding-bottom: 24px;
        margin-bottom: 8px;
        border-bottom: 1px solid rgba(255,255,255,.06);
    }

    /* Accordion mobile: có thể đóng/mở */
    .footer-accordion summary {
        cursor: pointer;
    }

    .footer-nav-title {
        padding: 16px 0;
        margin-bottom: 0;
        border-bottom: 1px solid rgba(255,255,255,.06);
        position: relative;
        user-select: none;
    }

    /* Mũi tên đóng/mở */
    .footer-nav-title::after {
        content: '\f078'; /* fa-chevron-down */
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        font-size: 11px;
        color: #475569;
        margin-left: auto;
        transition: transform .3s ease;
    }

    .footer-accordion[open] .footer-nav-title::after {
        transform: rotate(180deg);
    }

    .footer-accordion[open] .footer-nav-title {
        border-bottom-color: rgba(217,35,21,.3);
    }

    .footer-nav-list {
        padding: 4px 0 12px 28px;
    }

    .footer-nav-list a {
        padding: 8px 0;
        font-size: 13px;
    }

    /* Bottom */
    .footer-bottom {
        margin-top: 20px;
        padding: 16px 0 20px;
    }

    /* Nếu có bottom nav, thêm padding dưới */
    .vt-footer {
        padding-bottom: 70px;
    }
}

@media (max-width: 480px) {
    .footer-contact {
        flex-direction: column;
        gap: 8px;
    }

    .footer-trust-badges {
        gap: 4px;
    }

    .trust-chip {
        font-size: 10px;
        padding: 3px 8px;
    }
}

/* ============================================================
   5G VIETTEL — K2 NEWS MODULE (Tin Tức & Tư Vấn)
   Tách riêng — Chỉ CSS, không đổi HTML
   ============================================================ */

/* ---------- WRAPPER ---------- */
.k2ItemsBlock {
    padding: 50px 0;
    background: #f8fafc;
}

.k2ItemsBlock > section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- HEADING ---------- */
.k2ItemsBlock h2 {
    font-size: clamp(20px, 3vw, 26px);
    font-weight: 800;
    color: #1e293b;
    text-align: center;
    margin-bottom: 32px;
}

.k2ItemsBlock h2 a {
    color: #1e293b;
    text-decoration: none;
    transition: color .25s ease;
}

.k2ItemsBlock h2 a:hover {
    color: #d92315;
}

/* ---------- GRID ---------- */
.k2-grid-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

/* ---------- CARD ---------- */
.k2-card {
    background: #ffffff;
    border-radius: 12px;
    border: 1.5px solid #e2e8f0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: all .3s ease;
}

.k2-card:hover {
    border-color: #d92315;
    box-shadow: 0 8px 24px rgba(0,0,0,.08);
    transform: translateY(-4px);
}

/* ---------- IMAGE ---------- */
.k2-card-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 10;
    flex-shrink: 0;
}

.k2-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .4s ease;
}

.k2-card:hover .k2-card-image img {
    transform: scale(1.06);
}

.k2-card-image a {
    display: block;
    width: 100%;
    height: 100%;
}

/* ---------- BODY ---------- */
.k2-card-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

/* Title */
.k2-card-title {
    font-size: 14.5px;
    font-weight: 700;
    line-height: 1.45;
    margin: 0 0 auto;
    /* Giới hạn 3 dòng */
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.k2-card-title a {
    color: #1e293b;
    text-decoration: none;
    transition: color .25s ease;
}

.k2-card-title a:hover {
    color: #d92315;
}

/* Meta (date) */
.k2-card-meta {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid #f1f5f9;
}

.k2-date {
    font-size: 12px;
    color: #94a3b8;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.k2-date i {
    font-size: 11px;
    color: #cbd5e1;
}

/* ---------- CARD KHÔNG CÓ ẢNH ---------- */
/* Khi bài viết không có ảnh, card chỉ có body */
.k2-card:not(:has(.k2-card-image)) {
    background: linear-gradient(135deg, #0f172a, #1e293b);
    border-color: #334155;
}

.k2-card:not(:has(.k2-card-image)):hover {
    border-color: #d92315;
}

.k2-card:not(:has(.k2-card-image)) .k2-card-title a {
    color: #e2e8f0;
}

.k2-card:not(:has(.k2-card-image)) .k2-card-title a:hover {
    color: #ff8a80;
}

.k2-card:not(:has(.k2-card-image)) .k2-card-meta {
    border-top-color: rgba(255,255,255,.08);
}

.k2-card:not(:has(.k2-card-image)) .k2-date {
    color: #64748b;
}

.k2-card:not(:has(.k2-card-image)) .k2-date i {
    color: #475569;
}

/* Fallback cho trình duyệt không hỗ trợ :has() */
.k2-card .k2-card-body:first-child {
    padding-top: 20px;
}

/* ---------- RESPONSIVE ---------- */

/* Tablet */
@media (max-width: 1024px) {
    .k2-grid-container {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }
}

/* Mobile ngang */
@media (max-width: 768px) {
    .k2ItemsBlock {
        padding: 35px 0;
    }

    .k2-grid-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

    .k2-card-body {
        padding: 12px;
    }

    .k2-card-title {
        font-size: 13.5px;
        -webkit-line-clamp: 2;
    }
}

/* Mobile dọc */
@media (max-width: 480px) {
    .k2-grid-container {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    /* Trên mobile nhỏ: chuyển card sang dạng ngang */
    .k2-card {
        flex-direction: row;
        align-items: stretch;
    }

    .k2-card-image {
        width: 120px;
        min-height: 90px;
        aspect-ratio: auto;
        flex-shrink: 0;
    }

    .k2-card-body {
        padding: 12px 14px;
        justify-content: center;
    }

    .k2-card-title {
        font-size: 13.5px;
        -webkit-line-clamp: 3;
    }

    .k2-card-meta {
        margin-top: 8px;
        padding-top: 8px;
    }

    /* Card không ảnh trên mobile vẫn full-width dọc */
    .k2-card:not(:has(.k2-card-image)) {
        flex-direction: column;
    }
}

/* ============================================================
   5G VIETTEL — RELATED POSTS (Có thể bạn quan tâm)
   Tách riêng — Chỉ CSS, không đổi HTML
   ============================================================ */

/* ---------- WRAPPER ---------- */
.pro-related-box {
    max-width: 820px;
    margin: 0 auto;
    padding: 40px 20px 50px;
}

/* ---------- TITLE ---------- */
.pro-related-title {
    font-size: 18px;
    font-weight: 800;
    color: #1e293b;
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 2px solid #e2e8f0;
    position: relative;
}

/* Gạch đỏ accent bên trái dưới */
.pro-related-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100px;
    height: 2px;
    background: #d92315;
}

/* ---------- LIST ---------- */
.pro-related-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* ---------- ITEM ---------- */
.pro-related-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    text-decoration: none;
    border-bottom: 1px solid #f1f5f9;
    border-radius: 8px;
    transition: all .25s ease;
}

.pro-related-item:last-child {
    border-bottom: none;
}

.pro-related-item:hover {
    background: #fef2f2;
    border-bottom-color: transparent;
    padding-left: 22px;
}

/* ---------- ICON (SVG arrow) ---------- */
.related-icon {
    flex-shrink: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
    border-radius: 8px;
    color: #94a3b8;
    margin-top: 1px;
    transition: all .25s ease;
}

.related-icon svg {
    width: 16px;
    height: 16px;
}

.pro-related-item:hover .related-icon {
    background: #d92315;
    color: #ffffff;
}

/* ---------- TEXT ---------- */
.related-text {
    font-size: 14px;
    font-weight: 600;
    color: #334155;
    line-height: 1.5;
    transition: color .25s ease;
    /* Giới hạn 2 dòng */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.pro-related-item:hover .related-text {
    color: #d92315;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 768px) {
    .pro-related-box {
        padding: 30px 16px 40px;
    }

    .pro-related-item {
        padding: 12px 12px;
        gap: 10px;
    }

    .pro-related-item:hover {
        padding-left: 16px;
    }

    .related-text {
        font-size: 13.5px;
    }

    .related-icon {
        width: 28px;
        height: 28px;
    }
} 

/* ============================================================
   5G VIETTEL — AUTHOR BOX (Thông tin tác giả)
   Tách riêng — CSS only accordion (checkbox hack)
   ============================================================ */

/* ---------- WRAPPER ---------- */
.author-box-css-only {
    max-width: 820px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Ẩn checkbox trigger */
.auth-trigger-input {
    display: none;
}

/* ---------- HEADER (Label clickable) ---------- */
.auth-header-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    background: #ffffff;
    border: 1.5px solid #e2e8f0;
    border-radius: 12px;
    padding: 16px 20px;
    cursor: pointer;
    transition: all .25s ease;
    user-select: none;
}

.auth-header-label:hover {
    border-color: #d92315;
    box-shadow: 0 4px 12px rgba(0,0,0,.06);
}

/* Info wrap: avatar + text */
.auth-info-wrap {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
}

/* Avatar */
.auth-avatar-link {
    flex-shrink: 0;
    display: block;
}

.auth-img {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #e2e8f0;
    transition: border-color .25s ease;
}

.auth-header-label:hover .auth-img {
    border-color: #d92315;
}

/* Text */
.auth-text {
    min-width: 0;
}

.auth-sub {
    display: block;
    font-size: 11px;
    font-weight: 600;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: .8px;
    line-height: 1.2;
    margin-bottom: 2px;
}

.auth-name {
    font-size: 16px;
    font-weight: 800;
    margin: 0;
    line-height: 1.3;
}

.auth-name a {
    color: #1e293b;
    text-decoration: none;
    transition: color .25s ease;
}

.auth-name a:hover {
    color: #d92315;
}

/* Plus/minus icon */
.auth-plus-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
    border-radius: 50%;
    font-size: 20px;
    font-weight: 300;
    color: #64748b;
    line-height: 1;
    transition: all .3s ease;
}

.auth-header-label:hover .auth-plus-icon {
    background: #fef2f2;
    color: #d92315;
}

/* Khi mở: xoay thành dấu × */
.auth-trigger-input:checked ~ .auth-header-label .auth-plus-icon {
    transform: rotate(45deg);
    background: #d92315;
    color: #ffffff;
}

/* Khi mở: bo góc dưới phẳng để nối body */
.auth-trigger-input:checked ~ .auth-header-label {
    border-radius: 12px 12px 0 0;
    border-bottom-color: transparent;
    border-color: #d92315;
}

/* ---------- BODY (Mở/đóng) ---------- */
.auth-body-content {
    max-height: 0;
    overflow: hidden;
    background: #ffffff;
    border: 1.5px solid transparent;
    border-top: none;
    border-radius: 0 0 12px 12px;
    transition: max-height .35s ease, border-color .25s ease, padding .35s ease;
    padding: 0 20px;
}

.auth-trigger-input:checked ~ .auth-body-content {
    max-height: 300px;
    border-color: #d92315;
    border-top: none;
    padding: 18px 20px;
}

/* Bio text */
.auth-bio-text p {
    font-size: 14px;
    color: #475569;
    line-height: 1.7;
    margin: 0;
}

.auth-bio-text strong {
    color: #1e293b;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 768px) {
    .author-box-css-only {
        padding: 0 16px;
    }

    .auth-header-label {
        padding: 14px 16px;
    }

    .auth-img {
        width: 44px;
        height: 44px;
    }

    .auth-name {
        font-size: 14.5px;
    }

    .auth-sub {
        font-size: 10px;
    }

    .auth-plus-icon {
        width: 28px;
        height: 28px;
        font-size: 18px;
    }

    .auth-trigger-input:checked ~ .auth-body-content {
        padding: 14px 16px;
    }

    .auth-bio-text p {
        font-size: 13.5px;
    }
}


/* ============================================================
   5G VIETTEL — STICKY FOOTER CTA (Nút đăng ký mobile)
   Chỉ hiển thị trên mobile (≤768px)
   ============================================================ */

/* ---------- Ẩn mặc định trên PC ---------- */
.pro-sticky-footer {
    display: none;
}

/* ---------- Hiển thị trên Mobile ---------- */
@media (max-width: 768px) {
    .pro-sticky-footer {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 999;
        background: #ffffff;
        border-top: 1px solid #e2e8f0;
        box-shadow: 0 -4px 20px rgba(0,0,0,.1);
        padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
    }

    /* --- Thông tin gói (bên trái) --- */
    .pro-sticky-footer .footer-info {
        display: flex;
        flex-direction: column;
        gap: 1px;
        min-width: 0;
    }

    .pro-sticky-footer .pkg-name {
        font-size: 15px;
        font-weight: 800;
        color: #1e293b;
        line-height: 1.2;
    }

    .pro-sticky-footer .price-box {
        display: flex;
        align-items: baseline;
        gap: 3px;
    }

    .pro-sticky-footer .price {
        font-size: 17px;
        font-weight: 900;
        color: #d92315;
        line-height: 1.2;
    }

    .pro-sticky-footer .unit {
        font-size: 12px;
        font-weight: 500;
        color: #94a3b8;
    }

    /* --- Nút CTA (bên phải) --- */
    .btn-register-pro {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, #d92315, #b71c1c);
        color: #ffffff;
        font-size: 13.5px;
        font-weight: 800;
        letter-spacing: .5px;
        padding: 12px 22px;
        border-radius: 50px;
        border: none;
        text-decoration: none;
        white-space: nowrap;
        flex-shrink: 0;
        box-shadow: 0 4px 14px rgba(217,35,21,.35);
        transition: all .25s ease;
        animation: ctaPulse 2.5s ease-in-out infinite;
    }

    .btn-register-pro:hover,
    .btn-register-pro:active {
        background: linear-gradient(135deg, #ff5252, #d92315);
        box-shadow: 0 6px 20px rgba(217,35,21,.45);
        transform: scale(1.02);
    }

    /* Nhấp nháy nhẹ thu hút chú ý */
    @keyframes ctaPulse {
        0%, 100% { box-shadow: 0 4px 14px rgba(217,35,21,.35); }
        50% { box-shadow: 0 4px 22px rgba(217,35,21,.55); }
    }

    /* Đẩy bottom nav (nếu có) lên trên sticky CTA */
    .app-bottom-nav {
        bottom: 60px;
    }

    /* Thêm khoảng trống cuối body tránh bị che */
    body {
        padding-bottom: 80px;
    }
}

/* Mobile nhỏ hơn */
@media (max-width: 380px) {
    .pro-sticky-footer .price {
        font-size: 15px;
    }

    .btn-register-pro {
        font-size: 12px;
        padding: 11px 16px;
    }
}

/* ============================================================
   5G VIETTEL — SIGNATURE META (Dòng cập nhật thời gian)
   ============================================================ */

.signature-meta {
    max-width: 820px;
    margin: 0 auto;
    padding: 14px 20px;
    font-size: 12.5px;
    color: #94a3b8;
    display: flex;
    align-items: center;
    gap: 6px;
    border-top: 1px dashed #e2e8f0;
}

.signature-meta i {
    font-size: 13px;
    color: #cbd5e1;
}

.signature-meta strong {
    color: #64748b;
    font-weight: 700;
}

@media (max-width: 768px) {
    .signature-meta {
        padding: 12px 16px;
        font-size: 12px;
    }
}

/* ============================================================
   5G VIETTEL — SIGNATURE META (Dòng cập nhật thời gian)
   ============================================================ */

.signature-meta {
    max-width: 820px;
    margin: 0 auto;
    padding: 14px 20px;
    font-size: 12.5px;
    color: #94a3b8;
    display: flex;
    align-items: center;
    gap: 6px;
    border-top: 1px dashed #e2e8f0;
}

.signature-meta i {
    font-size: 13px;
    color: #cbd5e1;
}

.signature-meta strong {
    color: #64748b;
    font-weight: 700;
}

@media (max-width: 768px) {
    .signature-meta {
        padding: 12px 16px;
        font-size: 12px;
    }
	.hero-subtitle, .main-title, .tech-tag
	{
		text-align:justify;
	}
}
.hero-cta-group
{
	margin-bottom:15px;
	
}


/* === SEO Sapo – Blend với layout dark === */
.seo-sapo {
    max-width: 820px;
    margin: 0 auto;
    padding: 24px 32px;
    background: rgba(15, 23, 42, 0.75);          /* nền tối bán trong suốt */
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-left: 4px solid #d92315;

    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
	margin-bottom:15px;
	margin-top:15px;
	 border-radius: var(--radius-xl);
}
.seo-sapo p {
    color: #cbd5e1;
    font-size: 16px;
    line-height: 1.8;
    margin: 0;
}
.seo-sapo p strong {
    color: #fff;
}
.seo-sapo p a {
    color: #38bdf8;
    text-decoration: underline;
}


/* === Bottom Nav Mobile (dùng chung cho trang chủ + tất cả bài viết) === */
.app-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 999;
    background: #0f172a;
    border-top: 2px solid #d92315;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.3);
    padding: 0;
    padding-bottom: env(safe-area-inset-bottom, 0);
}
.app-bottom-nav-inner {
    display: flex;
    justify-content: space-around;
    align-items: stretch;
}
.bnav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 10px 4px 8px;
    text-decoration: none;
    color: #64748b;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.3px;
    transition: color 0.2s;
    position: relative;
}
.bnav-item .bnav-icon {
    font-size: 18px;
    margin-bottom: 3px;
    transition: transform 0.2s, color 0.2s;
}
.bnav-item.active,
.bnav-item:active {
    color: #fff;
}
.bnav-item.active .bnav-icon {
    color: #d92315;
    transform: scale(1.15);
}
.bnav-item.active::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 2px;
    background: #d92315;
    border-radius: 0 0 2px 2px;
}
.bnav-item span {
    white-space: nowrap;
}

@media (max-width: 768px) {
    .app-bottom-nav {
        display: block;
    }
    /* Đẩy content cuối trang lên để không bị nav che */
    .seo-faq-section:last-of-type,
    .vt-conclusion-box,
    #seo-bottom {
        padding-bottom: 70px !important;
    }
}