/* ==========================================================================
   SELLTECH LANDING PAGE - CLEAN TECH DESIGN SYSTEM (INTER ONLY)
   Đặc trưng: Tinh giản, font Inter chuẩn Pisell, số to đậm nổi bật,
   không dùng font lập trình monospace gây khó đọc.
   ========================================================================== */

:root {
  /* Tech Palette */
  --primary: #0049ac;
  --primary-hover: #003680;
  --primary-active: #002860;
  --primary-subtle: #eff6ff;
  --primary-border: #bfdbfe;

  /* Gold / Amber Accent cho Đào Tạo Đinh Danh Đức */
  --gold-primary: #d97706;
  --gold-hover: #b45309;
  --gold-subtle: #fffbeb;
  --gold-border: #fde68a;
  --gold-text: #78350f;

  /* Neutral & Dark */
  --dark-950: #0a0f1d;
  --dark-900: #0f172a;
  --dark-800: #1e293b;
  --dark-700: #334155;
  --dark-600: #475569;
  --dark-500: #64748b;
  --dark-400: #94a3b8;

  /* Surfaces */
  --surface-0: #ffffff;
  --surface-1: #f8fafc;
  --surface-2: #f1f5f9;
  --surface-3: #e2e8f0;

  /* Borders */
  --border-subtle: #e2e8f0;
  --border-strong: #cbd5e1;
  --border-focus: #0049ac;

  /* State */
  --success: #16a34a;
  --success-bg: #f0fdf4;
  --success-border: #bbf7d0;

  /* Typography: Inter chuẩn xác tuyệt đối cho cả chữ và số */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

  /* Dimensions */
  --container-max: 1200px;
  --header-height: 72px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--surface-0);
  color: var(--dark-700);
  line-height: 1.6;
  letter-spacing: -0.011em;
  overflow-x: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
}

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

ul {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

.container {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.container-sm {
  max-width: 860px;
}

/* ==========================================================================
   BUTTONS (SẮC NÉT, TINH TẾ)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1;
  padding: 12px 20px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  color: #ffffff;
}

.btn-secondary {
  background-color: var(--surface-0);
  color: var(--dark-800);
  border-color: var(--border-strong);
}
.btn-secondary:hover {
  background-color: var(--surface-1);
  border-color: var(--dark-700);
  color: var(--dark-900);
}

.btn-gold {
  background-color: #f59e0b;
  color: #0f172a;
  border-color: #d97706;
  font-weight: 700;
}
.btn-gold:hover {
  background-color: #d97706;
  border-color: #b45309;
  color: #000000;
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13.5px;
  border-radius: 6px;
}

.btn-lg {
  padding: 14px 24px;
  font-size: 15.5px;
  border-radius: 8px;
}

/* ==========================================================================
   TOPBAR
   ========================================================================== */
.topbar {
  background-color: var(--dark-950);
  color: var(--dark-400);
  font-size: 12.5px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 8px 0;
}

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

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

.topbar-left strong {
  color: #ffffff;
}

.topbar-divider {
  color: var(--dark-600);
}

.topbar-link {
  color: #60a5fa;
  font-weight: 700;
}

.topbar-link:hover {
  color: #93c5fd;
}

.status-indicator {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #22c55e;
  box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.25);
}

.topbar-badge-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  padding: 3px 10px;
  border-radius: 4px;
  border: 1px solid rgba(245, 158, 11, 0.3);
  font-weight: 500;
}
.topbar-badge-link:hover {
  background-color: rgba(245, 158, 11, 0.25);
  color: #fde047;
}

/* ==========================================================================
   HEADER & NAVBAR
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.header.scrolled {
  border-bottom-color: var(--border-strong);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

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

.brand-logo {
  display: flex;
  align-items: center;
}

.brand-img {
  height: 44px;
  width: auto;
  object-fit: contain;
  transition: transform 0.2s ease;
}
.brand-logo:hover .brand-img {
  transform: scale(1.02);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--dark-600);
  padding: 6px 0;
}
.nav-link:hover {
  color: var(--primary);
}

.nav-link-external {
  color: var(--gold-primary);
  font-weight: 600;
}
.nav-link-external:hover {
  color: var(--gold-hover);
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 6px;
  color: var(--dark-800);
  cursor: pointer;
}

/* ==========================================================================
   HERO SECTION (ĐIỂM NHẤN TẬP TRUNG, THÔNG THOÁNG)
   ========================================================================== */
.hero {
  padding: 64px 0 56px 0;
  background: linear-gradient(180deg, var(--surface-1) 0%, var(--surface-0) 100%);
  border-bottom: 1px solid var(--border-subtle);
}

.hero-inner {
  max-width: 1040px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--primary-subtle);
  border: 1px solid var(--primary-border);
  color: var(--primary);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 24px;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--primary);
}

.hero-title {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.025em;
  color: var(--dark-950);
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 17px;
  line-height: 1.65;
  color: var(--dark-600);
  margin-bottom: 36px;
  max-width: 840px;
  margin-left: auto;
  margin-right: auto;
}

.hero-desc strong {
  color: var(--dark-900);
}

.hero-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

/* ==========================================================================
   HERO KEY METRICS SPOTLIGHT (SỐ TO, ĐẬM, HIỆU ỨNG TĂNG DẦN)
   ========================================================================== */
.hero-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  text-align: left;
}

.metric-card {
  background-color: var(--surface-0);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 24px 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}
.metric-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
}

.metric-card.highlight-gold {
  border-color: var(--gold-border);
  background-color: #fffdfa;
}

/* SỐ TO ĐẬM RÕ RÀNG */
.metric-value {
  font-family: var(--font-sans);
  font-size: 38px;
  font-weight: 900;
  color: var(--dark-950);
  line-height: 1.1;
  margin-bottom: 8px;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 2px;
}

.metric-unit {
  font-size: 26px;
  font-weight: 800;
  margin-left: 2px;
  opacity: 0.9;
}

.metric-value.gold-text {
  color: #b45309;
}

.metric-value.blue-text {
  color: var(--primary);
}

.metric-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--dark-900);
  margin-bottom: 4px;
  line-height: 1.35;
}

.metric-sub {
  font-size: 12.5px;
  color: var(--dark-500);
  line-height: 1.45;
}

/* ==========================================================================
   SECTIONS CHUNG
   ========================================================================== */
.section {
  padding: 80px 0;
}

.section-alt {
  background-color: var(--surface-1);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  margin-bottom: 48px;
  max-width: 760px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--primary);
  background-color: var(--primary-subtle);
  border: 1px solid var(--primary-border);
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--dark-950);
  margin-bottom: 14px;
}

.section-desc {
  font-size: 16px;
  line-height: 1.6;
  color: var(--dark-600);
}

/* ==========================================================================
   3 TRỤ CỘT DỊCH VỤ - SPOTLIGHT CARDS (FOCAL POINT CHÍNH)
   ========================================================================== */
.spotlight-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.spotlight-card {
  background-color: var(--surface-0);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.spotlight-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
}

/* Phân loại thẻ */
.card-pisell {
  border-color: #bfdbfe;
}
.card-agency {
  border-color: var(--border-subtle);
}
.card-training.featured-spotlight {
  border: 1.5px solid #f59e0b;
  background-color: #fffdfa;
  position: relative;
}

.spotlight-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  padding: 22px 24px;
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--surface-1);
  border-top-left-radius: 12px;
  border-top-right-radius: 12px;
}

.featured-spotlight .spotlight-header {
  background-color: #fefce8;
  border-bottom-color: #fde68a;
}

.spotlight-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 4px;
}

.badge-blue {
  background-color: var(--primary-subtle);
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

.badge-dark {
  background-color: var(--dark-800);
  color: #ffffff;
}

.badge-gold {
  background-color: #fef3c7;
  color: #92400e;
  border: 1px solid #fde68a;
}

.spotlight-price {
  font-size: 22px;
  font-weight: 900;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  display: flex;
  align-items: baseline;
  gap: 6px;
  flex-wrap: wrap;
  line-height: 1.25;
}

.spotlight-price.price-gold {
  color: #b45309;
}

.spotlight-sub {
  font-size: 13px;
  font-weight: 600;
  color: var(--dark-500);
}

.spotlight-body {
  padding: 28px 24px;
  flex: 1;
}

.spotlight-icon-box {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background-color: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.spotlight-icon-box.icon-gold {
  background-color: #fef3c7;
  color: #d97706;
}

.spotlight-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark-950);
  margin-bottom: 10px;
  line-height: 1.35;
}

.spotlight-desc {
  font-size: 14px;
  color: var(--dark-600);
  line-height: 1.55;
  margin-bottom: 24px;
}

.spotlight-points {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.point-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  color: var(--dark-700);
  line-height: 1.5;
}

.point-item strong {
  color: var(--dark-900);
}

.point-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--primary);
  margin-top: 7px;
  flex-shrink: 0;
}

.point-dot.point-dot-gold {
  background-color: #d97706;
}

.spotlight-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--surface-0);
  border-bottom-left-radius: 12px;
  border-bottom-right-radius: 12px;
}

.featured-spotlight .spotlight-footer {
  background-color: #fffdfa;
  border-top-color: #fde68a;
}

/* ==========================================================================
   VỀ SELLTECH & GIÁ TRỊ CỐT LÕI (VALUES GRID)
   ========================================================================== */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.value-card {
  background-color: var(--surface-0);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 24px 20px;
}

.value-num {
  font-size: 34px;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 14px;
  letter-spacing: -0.04em;
  display: block;
}

.value-card h4 {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--dark-900);
  margin-bottom: 8px;
  line-height: 1.35;
}

.value-card p {
  font-size: 13.5px;
  color: var(--dark-600);
  line-height: 1.55;
}

/* ==========================================================================
   FAQ ACCORDION
   ========================================================================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background-color: var(--surface-0);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--primary-border);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  background: none;
  border: none;
  text-align: left;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--dark-900);
  cursor: pointer;
  gap: 16px;
}
.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  width: 18px;
  height: 18px;
  color: var(--dark-500);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

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

.faq-answer {
  display: none;
  padding: 0 20px 20px 20px;
  font-size: 14.5px;
  color: var(--dark-600);
  line-height: 1.6;
}

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

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: flex-start;
}

.contact-info-panel {
  padding-right: 20px;
}

.contact-items-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.contact-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background-color: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-item-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--dark-500);
  margin-bottom: 2px;
}

.contact-item-value {
  font-size: 15px;
  color: var(--dark-800);
  font-weight: 600;
}

.contact-form-panel {
  background-color: var(--surface-0);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 32px 28px;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--dark-800);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  font-size: 14.5px;
  color: var(--dark-900);
  background-color: var(--surface-0);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(0, 73, 172, 0.12);
}

.form-success-alert {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background-color: var(--success-bg);
  border: 1px solid var(--success-border);
  border-radius: 8px;
  color: var(--dark-800);
  font-size: 14px;
  margin-top: 16px;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background-color: var(--dark-950);
  color: #ffffff;
  padding: 64px 0 32px 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 36px;
  margin-bottom: 48px;
}

.footer-brand .brand-img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #ffffff;
  margin-bottom: 18px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  font-size: 13.5px;
  color: var(--dark-400);
}
.footer-col a:hover {
  color: #ffffff;
}

.footer-contact-list li {
  font-size: 13.5px;
  color: var(--dark-400);
  line-height: 1.5;
}

.footer-contact-list strong {
  color: var(--dark-300);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12.5px;
  color: var(--dark-400);
  gap: 16px;
}

/* ==========================================================================
   RESPONSIVE DESIGN (MOBILE & TABLET)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .topbar {
    display: none;
  }

  .nav-menu {
    display: none;
  }

  .nav-menu.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--surface-0);
    border-bottom: 1px solid var(--border-strong);
    padding: 20px;
    gap: 14px;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.06);
  }

  .mobile-toggle {
    display: block;
  }

  .hero {
    padding: 48px 0 40px 0;
  }

  .hero-title {
    font-size: 30px;
  }

  .hero-desc {
    font-size: 15.5px;
  }

  .metric-value {
    font-size: 32px;
  }

  .metric-unit {
    font-size: 22px;
  }

  .hero-metrics-grid {
    grid-template-columns: 1fr;
  }

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

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ==========================================================================
   FLOATING CONTACT WIDGET (ZALO & HOTLINE)
   ========================================================================== */
.floating-contact-group {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-end;
}

.floating-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 48px;
  padding: 0 16px 0 6px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-size: 13.5px;
  color: #ffffff !important;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.2);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
  position: relative;
  cursor: pointer;
  user-select: none;
}

.floating-btn:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 6px 22px rgba(15, 23, 42, 0.28);
}

.floating-btn-zalo {
  background: #0068ff;
}

.floating-btn-hotline {
  background: #16a34a;
}

.floating-btn-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
}

.floating-btn-hotline .floating-btn-icon {
  background: rgba(255, 255, 255, 0.2);
}

.floating-btn-text {
  letter-spacing: -0.01em;
  white-space: nowrap;
}

/* Hiệu ứng rung nhẹ thu hút sự chú ý (Subtle Wiggle) */
@keyframes subtleWiggle {
  0%, 100% { transform: rotate(0deg); }
  15% { transform: rotate(-10deg) scale(1.05); }
  30% { transform: rotate(10deg) scale(1.05); }
  45% { transform: rotate(-8deg); }
  60% { transform: rotate(8deg); }
  75% { transform: rotate(-4deg); }
  85% { transform: rotate(2deg); }
}

.floating-btn-icon {
  animation: subtleWiggle 3.5s infinite ease-in-out;
}

.floating-btn-hotline .floating-btn-icon {
  animation-delay: 1.75s; /* Rung so le để không bị trùng thời điểm */
}

/* Hiệu ứng sóng lan tỏa radar nhẹ (Pulse Ripple) */
.floating-btn::before {
  content: '';
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  animation: pulseRipple 2.6s infinite ease-out;
}

.floating-btn-zalo::before {
  border: 2px solid rgba(0, 104, 255, 0.65);
}

.floating-btn-hotline::before {
  border: 2px solid rgba(22, 163, 74, 0.65);
  animation-delay: 1.3s;
}

@keyframes pulseRipple {
  0% {
    transform: scale(0.96);
    opacity: 0.8;
  }
  60% {
    transform: scale(1.12);
    opacity: 0;
  }
  100% {
    transform: scale(1.15);
    opacity: 0;
  }
}

@media (max-width: 640px) {
  .floating-contact-group {
    bottom: 18px;
    right: 16px;
    gap: 10px;
  }
  .floating-btn {
    height: 44px;
    padding: 0 14px 0 5px;
    font-size: 13px;
  }
  .floating-btn-icon {
    width: 34px;
    height: 34px;
  }
}