:root {
  --tfs-bg: #F4F7FB;
  --tfs-surf: #FFFFFF;
  --tfs-surf2: #EAF0F8;
  --tfs-navy: #0F2942;
  --tfs-pri: #1D4ED8;
  --tfs-sec: #0284C7;
  --tfs-gold: #D97706;
  --tfs-gold-bg: #FEF3C7;
  --tfs-txt: #0F172A;
  --tfs-muted: #475569;
  --tfs-bdr: #CBD5E1;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body.tfs-body {
  background-color: var(--tfs-bg);
  background-image:
    radial-gradient(circle at 10% 5%, rgba(29, 78, 216, 0.06), transparent 35%),
    radial-gradient(circle at 90% 12%, rgba(217, 119, 6, 0.06), transparent 35%);
  color: var(--tfs-txt);
  font-family: 'Prompt', 'Kanit', 'Noto Sans Thai', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.75;
  overflow-x: hidden;
}
a { color: var(--tfs-pri); text-decoration: none; transition: all 0.2s ease; }
a:hover { color: var(--tfs-navy); }
.tfs-wrap { max-width: 1240px; margin: 0 auto; padding: 0 20px; }

/* E-COMMERCE ANNOUNCEMENT TOPBAR */
.tfs-promo-bar {
  background: linear-gradient(90deg, var(--tfs-navy), var(--tfs-pri));
  color: #FFFFFF; font-size: 0.83rem; padding: 8px 0;
  border-bottom: 2px solid var(--tfs-gold);
}
.tfs-promo-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.tfs-trust-pill {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,0.14); color: #FDE047;
  padding: 2px 12px; border-radius: 999px; font-weight: 700; font-size: 0.78rem;
  border: 1px solid rgba(253, 224, 71, 0.4);
}

/* LIGHT-THEME E-COMMERCE STOREFRONT HEADER */
.tfs-header {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--tfs-bdr);
  box-shadow: 0 4px 20px rgba(15, 41, 66, 0.06);
  position: sticky; top: 0; z-index: 100;
}
.tfs-header-main {
  display: grid; grid-template-columns: auto 1fr auto;
  align-items: center; gap: 20px; padding: 14px 0;
}
.tfs-brand-box { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.tfs-logo-badge {
  background: linear-gradient(135deg, var(--tfs-navy), #163A5F);
  padding: 6px 14px; border-radius: 12px;
  border: 1px solid rgba(217, 119, 6, 0.45);
  display: inline-flex; align-items: center;
  box-shadow: 0 4px 12px rgba(15, 41, 66, 0.15);
}
.tfs-logo-img {
  height: 44px; width: auto; max-width: 165px;
  object-fit: contain; display: block;
}
.tfs-brand-title { font-size: 1.08rem; font-weight: 800; color: var(--tfs-navy); display: block; line-height: 1.2; }
.tfs-brand-tag { font-size: 0.75rem; color: var(--tfs-muted); display: block; }

/* E-Commerce Search / Quick-Access Finder Bar */
.tfs-search-form {
  display: flex; align-items: center;
  background: var(--tfs-bg); border: 1.5px solid var(--tfs-bdr);
  border-radius: 999px; padding: 4px 6px 4px 16px;
  max-width: 480px; width: 100%; margin: 0 auto;
}
.tfs-search-form:focus-within { border-color: var(--tfs-pri); background: #FFFFFF; box-shadow: 0 0 0 3px rgba(29,78,216,0.12); }
.tfs-search-input {
  border: none; background: transparent; color: var(--tfs-txt);
  font-size: 0.86rem; width: 100%; font-family: inherit; outline: none;
}
.tfs-search-btn {
  background: var(--tfs-pri); color: #FFFFFF; border: none;
  padding: 7px 16px; border-radius: 999px; font-weight: 700; font-size: 0.82rem; cursor: pointer; white-space: nowrap;
}

/* Quick Store Utility Actions (Account / Wallet / Cart-Style Access) */
.tfs-store-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.tfs-btn-pri, .tfs-btn-sec, .tfs-btn-gold {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 8px 16px; border-radius: 10px; font-weight: 700; font-size: 0.85rem;
  cursor: pointer; text-decoration: none; white-space: nowrap; transition: all 0.2s ease;
}
.tfs-btn-pri {
  background: linear-gradient(135deg, var(--tfs-pri), var(--tfs-sec));
  color: #FFFFFF !important; border: none;
  box-shadow: 0 4px 12px rgba(29, 78, 216, 0.25);
}
.tfs-btn-gold {
  background: linear-gradient(135deg, #F59E0B, #D97706);
  color: #FFFFFF !important; border: none;
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.25);
}
.tfs-btn-sec {
  background: #FFFFFF; color: var(--tfs-navy) !important;
  border: 1.5px solid var(--tfs-pri);
}
.tfs-btn-pri:hover, .tfs-btn-gold:hover, .tfs-btn-sec:hover { transform: translateY(-1px); }

/* CATEGORY RIBBON BAR */
.tfs-cat-bar {
  background: var(--tfs-surf2);
  border-top: 1px solid var(--tfs-bdr);
}
.tfs-nav {
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap; padding: 8px 0;
}
.tfs-nav a {
  color: var(--tfs-navy); font-size: 0.88rem; font-weight: 600;
  padding: 6px 13px; border-radius: 8px;
}
.tfs-nav a:hover, .tfs-nav a.active {
  background: var(--tfs-pri); color: #FFFFFF !important;
}

/* STOREFRONT HERO SHOWCASE */
.tfs-hero { padding: 24px 0 20px; }
.tfs-hero-card {
  background: var(--tfs-surf);
  border: 1px solid var(--tfs-bdr);
  border-radius: 20px; padding: 26px;
  box-shadow: 0 12px 32px rgba(15, 41, 66, 0.07);
}
.tfs-hero-head { text-align: center; max-width: 960px; margin: 0 auto 18px; }
.tfs-kicker {
  display: inline-block; padding: 4px 14px; border-radius: 999px;
  background: var(--tfs-gold-bg); color: #92400E;
  font-size: 0.82rem; font-weight: 700; margin-bottom: 10px;
  border: 1px solid rgba(217, 119, 6, 0.35);
}
.tfs-hero h1 {
  font-size: clamp(1.6rem, 2.7vw, 2.25rem);
  line-height: 1.32; color: var(--tfs-navy); margin-bottom: 10px;
}
.tfs-hero-lead { font-size: 1rem; color: var(--tfs-muted); max-width: 860px; margin: 0 auto 16px; }
.tfs-banner-frame {
  border-radius: 16px; overflow: hidden;
  border: 2px solid var(--tfs-pri);
  box-shadow: 0 14px 34px rgba(15, 41, 66, 0.14);
  background: var(--tfs-navy); margin-bottom: 18px;
}
.tfs-banner-frame img, .tfs-fig img, .tfs-card-thumb img {
  width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; display: block;
}
.tfs-hero-cta-row { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin: 16px 0; }
.tfs-hero-cta-row a { padding: 11px 24px; font-size: 0.95rem; }

/* 4 E-COMMERCE TRUST GUARANTEES BAR */
.tfs-trust-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 20px 0;
}
.tfs-trust-card {
  background: var(--tfs-surf); border: 1px solid var(--tfs-bdr);
  border-top: 3px solid var(--tfs-pri);
  border-radius: 14px; padding: 16px;
  box-shadow: 0 4px 14px rgba(15, 41, 66, 0.04);
}
.tfs-trust-card strong { display: block; color: var(--tfs-navy); font-size: 0.98rem; margin-bottom: 4px; }
.tfs-trust-card span { font-size: 0.84rem; color: var(--tfs-muted); display: block; }

/* FEATURED E-COMMERCE PRODUCT SHELF (6 DIRECT-SLOT & ACCESS PACKAGES) */
.tfs-shelf-sec { margin: 28px 0 34px; }
.tfs-shelf-head {
  display: flex; justify-content: space-between; align-items: flex-end;
  flex-wrap: wrap; gap: 12px; margin-bottom: 16px;
  padding-bottom: 12px; border-bottom: 2px solid var(--tfs-bdr);
}
.tfs-shelf-head h2 { font-size: 1.45rem; color: var(--tfs-navy); }
.tfs-product-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.tfs-prod-card {
  background: var(--tfs-surf); border: 1px solid var(--tfs-bdr);
  border-radius: 16px; overflow: hidden; display: flex; flex-direction: column;
  box-shadow: 0 6px 20px rgba(15, 41, 66, 0.05);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}
.tfs-prod-card:hover {
  transform: translateY(-4px);
  border-color: var(--tfs-pri);
  box-shadow: 0 14px 30px rgba(29, 78, 216, 0.12);
}
.tfs-prod-body { padding: 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.tfs-prod-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.tfs-sku-tag {
  font-size: 0.73rem; font-weight: 700; color: var(--tfs-pri);
  background: var(--tfs-surf2); padding: 3px 9px; border-radius: 6px;
}
.tfs-badge-gold {
  font-size: 0.72rem; font-weight: 700; color: #92400E;
  background: var(--tfs-gold-bg); padding: 3px 9px; border-radius: 999px;
  border: 1px solid rgba(217, 119, 6, 0.3);
}
.tfs-prod-card h3 { font-size: 1.06rem; color: var(--tfs-navy); line-height: 1.38; margin: 2px 0; }
.tfs-prod-card p { font-size: 0.87rem; color: var(--tfs-muted); margin: 0; flex: 1; }
.tfs-prod-specs {
  background: var(--tfs-bg); border-radius: 10px; padding: 9px 12px;
  font-size: 0.8rem; color: var(--tfs-txt); display: flex; justify-content: space-between;
}
.tfs-prod-foot {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
  padding-top: 10px; border-top: 1px solid var(--tfs-bdr); margin-top: 4px;
}

/* SUMMARY CARD & BREADCRUMB */
.tfs-quick-box {
  background: linear-gradient(145deg, #FFFFFF, var(--tfs-surf2));
  border-left: 5px solid var(--tfs-pri);
  border-top: 1px solid var(--tfs-bdr);
  border-right: 1px solid var(--tfs-bdr);
  border-bottom: 1px solid var(--tfs-bdr);
  border-radius: 14px; padding: 18px 22px; margin: 16px 0;
}
.tfs-quick-box h2, .tfs-quick-box h3 { font-size: 1.08rem; color: var(--tfs-navy); margin-bottom: 8px; }
.tfs-quick-box ul { padding-left: 20px; margin-top: 10px; }
.tfs-quick-box li { margin-bottom: 6px; }

.tfs-breadcrumb {
  display: flex; gap: 8px; flex-wrap: wrap; list-style: none;
  font-size: 0.86rem; color: var(--tfs-muted); margin: 14px 0;
  padding: 9px 16px; background: var(--tfs-surf);
  border: 1px solid var(--tfs-bdr); border-radius: 10px;
}
.tfs-breadcrumb li+li::before { content: "›"; margin-right: 8px; color: var(--tfs-pri); font-weight: 700; }
.tfs-meta-bar {
  display: flex; flex-wrap: wrap; gap: 16px; align-items: center;
  background: var(--tfs-surf); border: 1px solid var(--tfs-bdr);
  border-radius: 10px; padding: 11px 16px; margin: 14px 0 22px;
  font-size: 0.84rem; color: var(--tfs-muted);
}
.tfs-meta-bar strong { color: var(--tfs-navy); }

/* 2-COLUMN STOREFILTER SIDEBAR + EDITORIAL MAIN */
.tfs-layout {
  display: grid; grid-template-columns: 280px 1fr; gap: 26px; align-items: start; margin: 22px 0 44px;
}
.tfs-toc {
  background: var(--tfs-surf); border: 1px solid var(--tfs-bdr);
  border-radius: 16px; padding: 20px; position: sticky; top: 96px;
  box-shadow: 0 6px 18px rgba(15, 41, 66, 0.05);
}
.tfs-toc h2 {
  font-size: 1rem; color: var(--tfs-navy); margin-bottom: 12px;
  padding-bottom: 8px; border-bottom: 2px solid var(--tfs-pri);
}
.tfs-toc ul { list-style: none; display: flex; flex-direction: column; gap: 7px; }
.tfs-toc a {
  display: block; padding: 8px 11px; border-radius: 8px;
  background: var(--tfs-bg); color: var(--tfs-txt); font-size: 0.86rem; font-weight: 500;
}
.tfs-toc a:hover { background: var(--tfs-pri); color: #FFFFFF; }

.tfs-article {
  background: var(--tfs-surf); border: 1px solid var(--tfs-bdr);
  border-radius: 20px; padding: 32px;
  box-shadow: 0 8px 24px rgba(15, 41, 66, 0.05);
}
.tfs-section { margin-bottom: 34px; padding-bottom: 26px; border-bottom: 1px solid var(--tfs-bdr); }
.tfs-section:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.tfs-section h2 { font-size: 1.42rem; color: var(--tfs-navy); margin-bottom: 14px; line-height: 1.35; }
.tfs-section h3 { font-size: 1.14rem; color: var(--tfs-pri); margin: 18px 0 10px; }
.tfs-section p { margin-bottom: 14px; text-align: justify; color: var(--tfs-txt); }
.tfs-section ul, .tfs-section ol { padding-left: 24px; margin: 14px 0; }
.tfs-section li { margin-bottom: 10px; }

.tfs-fig {
  margin: 20px 0; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--tfs-bdr); background: var(--tfs-surf2);
}
.tfs-fig figcaption { padding: 10px 14px; font-size: 0.84rem; color: var(--tfs-muted); text-align: center; background: #FFFFFF; }

/* SPECIFICATION COMPARISON TABLE */
.tfs-table-wrap { overflow-x: auto; margin: 18px 0; border-radius: 12px; border: 1px solid var(--tfs-bdr); }
.tfs-table { width: 100%; border-collapse: collapse; min-width: 580px; background: #FFFFFF; }
.tfs-table caption {
  text-align: left; padding: 13px 16px; font-weight: 700;
  color: #FFFFFF; background: var(--tfs-navy);
}
.tfs-table th, .tfs-table td {
  padding: 12px 16px; border-bottom: 1px solid var(--tfs-bdr); text-align: left; font-size: 0.91rem;
}
.tfs-table th { background: var(--tfs-surf2); color: var(--tfs-navy); font-weight: 700; }
.tfs-table tr:nth-child(even) td { background: #F8FAFC; }

/* VERIFIED BUYER / MEMBER REVIEWS & FAQ */
.tfs-reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 16px 0; }
.tfs-review-card {
  background: var(--tfs-bg); border: 1px solid var(--tfs-bdr);
  border-top: 3px solid var(--tfs-gold);
  border-radius: 14px; padding: 18px;
}
.tfs-review-card h3 { font-size: 0.98rem; color: var(--tfs-navy); margin-bottom: 8px; }
.tfs-review-author { font-size: 0.82rem; color: var(--tfs-pri); font-weight: 700; margin-top: 10px; display: block; }

.tfs-faq-item {
  background: var(--tfs-bg); border: 1px solid var(--tfs-bdr);
  border-radius: 12px; margin-bottom: 12px; padding: 14px 18px;
}
.tfs-faq-item summary { font-weight: 700; color: var(--tfs-navy); cursor: pointer; font-size: 0.98rem; }
.tfs-faq-item p { margin-top: 10px; color: var(--tfs-txt); font-size: 0.93rem; }

/* 4-COLUMN PROPORTIONAL MEGA-FOOTER (DEEP NAVY HIX168 CONTRAST) */
.tfs-footer {
  background: var(--tfs-navy); color: #CBD5E1;
  border-top: 4px solid var(--tfs-gold);
  padding: 44px 0 28px; margin-top: 52px; font-size: 0.88rem;
}
.tfs-footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 28px;
  padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,0.12);
}
.tfs-footer-col h3 { color: #FDE047; font-size: 1rem; margin-bottom: 12px; }
.tfs-footer-links { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.tfs-footer-links a { color: #E2E8F0; }
.tfs-footer-links a:hover { color: #FDE047; }
.tfs-pay-strip {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
  justify-content: center; padding: 20px 0; border-bottom: 1px solid rgba(255,255,255,0.12);
}
.tfs-pay-strip img {
  height: 32px; width: auto; border-radius: 6px;
  background: #FFFFFF; padding: 4px 8px;
}

@media (max-width: 980px) {
  .tfs-header-main { grid-template-columns: 1fr; }
  .tfs-layout { grid-template-columns: 1fr; }
  .tfs-toc { position: static; }
  .tfs-trust-grid, .tfs-product-grid, .tfs-reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .tfs-footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .tfs-trust-grid, .tfs-product-grid, .tfs-reviews-grid, .tfs-footer-grid { grid-template-columns: 1fr; }
}