/* ==========================================================================
   09-ho-tro-khach-hang HỖ TRỢ KHÁCH HÀNG
   Tách từ index.html: <style> dòng 680–770 (giữ nguyên 100% nội dung).
   Customer service: thẻ, kênh liên hệ, FAQs.
   ========================================================================== */
/* ============ CUSTOMER SERVICE ============ */
.customer-service {
  position: relative; z-index: 10;
  padding: 140px 40px 140px;
  max-width: 1180px; margin: 0 auto;
  background: var(--bg);
  scroll-margin-top: 80px;
}
.cs-header { text-align: center; margin-bottom: 88px; }
.cs-header h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 700; letter-spacing: -0.03em;
  margin-bottom: 14px;
  color: var(--text);
}
.cs-header h2 span { color: var(--gold); }
.cs-header p {
  font-size: 12px; color: var(--text-4);
  letter-spacing: 2.4px; text-transform: uppercase;
  font-weight: 500;
}

.cs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.cs-card {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 28px 26px;
  background: var(--bg-card);
  text-decoration: none;
  color: inherit;
  transition: background 0.2s ease;
  position: relative;
}
.cs-card:hover { background: #161616; }
.cs-card::after {
  content: '→';
  position: absolute;
  right: 24px;
  top: 28px;
  font-size: 14px;
  color: var(--gold);
  opacity: 0;
  transform: translateX(-4px);
  transition: all 0.25s ease;
  line-height: 1;
}
.cs-card:hover::after {
  opacity: 1;
  transform: translateX(0);
}
.cs-card-icon {
  width: 36px; height: 36px;
  border-radius: var(--radius);
  background: transparent;
  border: 1px solid var(--border-strong);
  display: grid; place-items: center;
  flex-shrink: 0;
  transition: border-color 0.2s ease;
}
.cs-card:hover .cs-card-icon { border-color: var(--gold); }
.cs-card-icon svg {
  width: 16px; height: 16px;
  stroke: var(--text-2); fill: none;
  stroke-width: 1.6;
  stroke-linecap: round; stroke-linejoin: round;
  transition: stroke 0.2s ease;
}
.cs-card:hover .cs-card-icon svg { stroke: var(--gold); }
.cs-card-content { flex: 1; min-width: 0; padding-right: 24px; }
.cs-card-content h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px; font-weight: 700;
  color: var(--text); margin-bottom: 6px;
  letter-spacing: -0.01em;
}
.cs-card-content p {
  font-size: 13px; color: var(--text-3);
  line-height: 1.6;
  letter-spacing: -0.005em;
}