:root {
  --vuy4-bg: #0a0815;
  --vuy4-bg-card: #141029;
  --vuy4-bg-elevated: #1e183a;
  --vuy4-primary: #261d56;
  --vuy4-accent: #2eaf14;
  --vuy4-text: #e2e8f0;
  --vuy4-text-muted: #94a3b8;
  --vuy4-border: #312860;
  --vuy4-radius: 4px;
  --vuy4-font-head: 'Kanit', sans-serif;
  --vuy4-font-body: 'Inter', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--vuy4-font-body);
  background-color: var(--vuy4-bg);
  color: var(--vuy4-text);
  line-height: 1.6;
  font-size: 15px;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: 0.3s ease; }

.vuy4-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Header & Nav */
.vuy4-header {
  background: var(--vuy4-bg-card);
  border-bottom: 2px solid var(--vuy4-primary);
  padding: 15px 0;
}
.vuy4-header-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
}
.vuy4-logo {
  font-family: var(--vuy4-font-head);
  font-size: 32px;
  font-weight: 800;
  color: var(--vuy4-accent);
  letter-spacing: 2px;
  text-transform: uppercase;
}
.vuy4-nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: center;
}
.vuy4-nav-link {
  font-size: 15px;
  font-weight: 500;
  padding: 5px 10px;
  color: var(--vuy4-text);
}
.vuy4-nav-link:hover {
  color: var(--vuy4-accent);
}

/* Ticker */
.vuy4-ticker-wrap {
  background: var(--vuy4-primary);
  border-bottom: 1px solid var(--vuy4-border);
  padding: 8px 0;
}
.vuy4-ticker-inner {
  display: flex;
  align-items: center;
  gap: 10px;
}
.vuy4-ticker-label {
  font-size: 13px;
  font-weight: 700;
  background: var(--vuy4-accent);
  color: #fff;
  padding: 2px 6px;
  border-radius: 2px;
  white-space: nowrap;
}
.vuy4-ticker-scroll {
  overflow: hidden;
  width: 100%;
}
.vuy4-ticker-track {
  display: flex;
  gap: 30px;
  white-space: nowrap;
  animation: vuy4-scroll 25s linear infinite;
}
.vuy4-ticker-item {
  font-size: 14px;
}
.vuy4-ticker-item a:hover { color: var(--vuy4-accent); }
@keyframes vuy4-scroll {
  0% { transform: translateX(100%); }
  100% { transform: translateX(-100%); }
}

/* Hero */
.vuy4-hero { padding: 40px 0; background: radial-gradient(circle at 50% 0%, var(--vuy4-primary) 0%, transparent 70%); }
.vuy4-hero-grid { display: grid; grid-template-columns: 1fr; gap: 30px; align-items: center; }
.vuy4-hero-title {
  font-family: var(--vuy4-font-head);
  font-size: 32px;
  line-height: 1.2;
  margin-bottom: 15px;
  color: #fff;
}
.vuy4-hero-slogan {
  font-size: 18px;
  font-weight: 700;
  color: var(--vuy4-accent);
  margin-bottom: 15px;
}
.vuy4-hero-desc { font-size: 16px; color: var(--vuy4-text-muted); }
.vuy4-hero-img-box { border-radius: var(--vuy4-radius); overflow: hidden; border: 2px solid var(--vuy4-border); box-shadow: 0 0 20px rgba(46, 175, 20, 0.15); }

/* Metrics */
.vuy4-metrics { padding: 20px 0; }
.vuy4-metrics-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.vuy4-metric-box {
  background: var(--vuy4-bg-card);
  padding: 20px;
  border-radius: var(--vuy4-radius);
  text-align: center;
  border: 1px solid var(--vuy4-border);
}
.vuy4-metric-val { display: block; font-family: var(--vuy4-font-head); font-size: 24px; color: var(--vuy4-accent); }
.vuy4-metric-lbl { display: block; font-size: 13px; color: var(--vuy4-text-muted); margin-top: 5px; text-transform: uppercase; letter-spacing: 1px; }

/* Section Titles */
.vuy4-section-title {
  font-family: var(--vuy4-font-head);
  font-size: 26px;
  margin-bottom: 10px;
  color: #fff;
  text-align: center;
}
.vuy4-section-sub {
  text-align: center;
  color: var(--vuy4-text-muted);
  margin-bottom: 30px;
  font-size: 15px;
}

/* Portal Tabs */
.vuy4-portal { padding: 40px 0; }
.vuy4-tab-nav { display: flex; flex-direction: column; gap: 10px; margin-bottom: 30px; }
.vuy4-tab-btn {
  background: var(--vuy4-bg-elevated);
  border: 1px solid var(--vuy4-border);
  color: var(--vuy4-text);
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border-radius: var(--vuy4-radius);
  transition: all 0.3s ease;
  font-family: var(--vuy4-font-head);
  text-transform: uppercase;
}
.vuy4-tab-btn:hover { background: var(--vuy4-primary); }
.vuy4-tab-btn.vuy4-active {
  background: var(--vuy4-accent);
  color: #fff;
  border-color: var(--vuy4-accent);
  box-shadow: 0 0 10px rgba(46, 175, 20, 0.4);
}
.vuy4-tab-pane { display: none; animation: vuy4-fade 0.4s ease forwards; }
.vuy4-tab-pane.vuy4-active { display: block; }
@keyframes vuy4-fade { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.vuy4-empty-state { text-align: center; padding: 40px; background: var(--vuy4-bg-card); color: var(--vuy4-text-muted); border-radius: var(--vuy4-radius); }

/* Card Component (Grid & Hover Glow) */
.vuy4-card-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
.vuy4-card {
  display: flex;
  flex-direction: column;
  background: var(--vuy4-bg-card);
  border: 1px solid var(--vuy4-border);
  border-radius: var(--vuy4-radius);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}
.vuy4-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 20px rgba(46, 175, 20, 0.3);
  border-color: var(--vuy4-accent);
}
.vuy4-card-img-wrap { position: relative; width: 100%; aspect-ratio: 4/3; background: #000; overflow: hidden; }
.vuy4-card-img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.vuy4-card:hover .vuy4-card-img { transform: scale(1.1); }
.vuy4-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--vuy4-accent);
  color: #fff;
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 700;
  border-radius: 2px;
  text-transform: uppercase;
  z-index: 2;
}
.vuy4-card-body { padding: 15px; }
.vuy4-card-title {
  font-family: var(--vuy4-font-head);
  font-size: 18px;
  color: #fff;
  margin-bottom: 5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.vuy4-card-sub { display: block; font-size: 13px; color: var(--vuy4-text-muted); }

/* Benefits & Steps */
.vuy4-benefits, .vuy4-steps { padding: 40px 0; }
.vuy4-benefits-grid, .vuy4-steps-grid { display: grid; grid-template-columns: 1fr; gap: 20px; margin-top: 30px; }
.vuy4-benefit-card, .vuy4-step-item {
  background: var(--vuy4-bg-card);
  padding: 25px;
  border: 1px solid var(--vuy4-border);
  border-radius: var(--vuy4-radius);
}
.vuy4-benefit-title { font-family: var(--vuy4-font-head); font-size: 20px; color: var(--vuy4-accent); margin-bottom: 10px; }
.vuy4-step-num {
  width: 40px;
  height: 40px;
  background: var(--vuy4-primary);
  color: var(--vuy4-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--vuy4-font-head);
  font-size: 20px;
  border-radius: 50%;
  margin-bottom: 15px;
  border: 2px solid var(--vuy4-accent);
}
.vuy4-step-title { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.vuy4-benefit-text, .vuy4-step-desc { font-size: 15px; color: var(--vuy4-text-muted); }

/* Comparison Table */
.vuy4-comparison { padding: 40px 0; background: var(--vuy4-bg-elevated); }
.vuy4-table-wrap { overflow-x: auto; margin-top: 30px; }
.vuy4-table { width: 100%; min-width: 600px; border-collapse: collapse; }
.vuy4-table th, .vuy4-table td { padding: 15px; text-align: left; border-bottom: 1px solid var(--vuy4-border); font-size: 15px; }
.vuy4-table th { font-family: var(--vuy4-font-head); color: #fff; background: var(--vuy4-primary); }
.vuy4-highlight { color: var(--vuy4-accent); font-weight: 700; }

/* Payments */
.vuy4-payments { padding: 40px 0; text-align: center; }
.vuy4-payment-tags { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 20px; }
.vuy4-pay-tag { padding: 8px 16px; background: var(--vuy4-bg-card); border: 1px solid var(--vuy4-border); border-radius: 20px; font-size: 13px; font-weight: 700; color: var(--vuy4-text); }

/* Article Section */
.vuy4-article-sec { padding: 40px 0; }
.vuy4-article {
  background: var(--vuy4-bg-card);
  padding: 25px;
  border-radius: var(--vuy4-radius);
  border: 1px solid var(--vuy4-border);
  color: var(--vuy4-text);
}
.vuy4-article h2, .vuy4-article h3 {
  font-family: var(--vuy4-font-head);
  color: #fff;
  margin: 25px 0 15px;
  line-height: 1.3;
}
.vuy4-article h2 { font-size: 24px; color: var(--vuy4-accent); border-bottom: 1px solid var(--vuy4-border); padding-bottom: 10px; }
.vuy4-article h3 { font-size: 20px; }
.vuy4-article p { margin-bottom: 15px; font-size: 15px; line-height: 1.7; }
.vuy4-article ul, .vuy4-article ol { margin-bottom: 20px; padding-left: 20px; }
.vuy4-article li { margin-bottom: 8px; font-size: 15px; }

/* Subpage Specifics */
.vuy4-page-header { background: var(--vuy4-bg-card); padding: 40px 0 30px; border-bottom: 1px solid var(--vuy4-border); }
.vuy4-crumbs { display: flex; flex-wrap: wrap; gap: 5px; font-size: 13px; margin-bottom: 15px; color: var(--vuy4-text-muted); }
.vuy4-crumb:hover { color: var(--vuy4-accent); }
.vuy4-crumb-sep { margin: 0 2px; }
.vuy4-page-title { font-family: var(--vuy4-font-head); font-size: 28px; color: #fff; margin-bottom: 10px; }
.vuy4-page-meta { font-size: 15px; color: var(--vuy4-text-muted); }
.vuy4-page-layout { display: grid; grid-template-columns: 1fr; gap: 30px; padding: 40px 15px; }
.vuy4-page-extras { display: flex; flex-direction: column; gap: 40px; }

/* FAQ */
.vuy4-faq-section { margin-top: 20px; }
.vuy4-faq-list { display: flex; flex-direction: column; gap: 10px; margin-top: 20px; }
.vuy4-faq-item { background: var(--vuy4-bg-card); border: 1px solid var(--vuy4-border); border-radius: var(--vuy4-radius); }
.vuy4-faq-q {
  padding: 15px;
  font-family: var(--vuy4-font-head);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  color: #fff;
  list-style: none;
  position: relative;
}
.vuy4-faq-q::-webkit-details-marker { display: none; }
.vuy4-faq-q::after { content: '+'; position: absolute; right: 15px; color: var(--vuy4-accent); font-size: 20px; }
.vuy4-faq-item[open] .vuy4-faq-q::after { content: '-'; }
.vuy4-faq-a { padding: 0 15px 15px; font-size: 15px; color: var(--vuy4-text-muted); border-top: 1px solid var(--vuy4-border); margin-top: 5px; padding-top: 15px; }

/* Pager */
.vuy4-pager { display: flex; justify-content: space-between; gap: 10px; margin-top: 20px; }
.vuy4-pager-link { display: inline-block; padding: 10px 20px; background: var(--vuy4-primary); color: #fff; font-size: 14px; font-weight: 700; border-radius: var(--vuy4-radius); transition: background 0.3s; }
.vuy4-pager-link:hover { background: var(--vuy4-accent); }

/* Footer */
.vuy4-footer { background: var(--vuy4-bg-card); border-top: 2px solid var(--vuy4-primary); padding: 40px 0 20px; margin-top: 40px; }
.vuy4-footer-grid { display: grid; grid-template-columns: 1fr; gap: 30px; margin-bottom: 30px; }
.vuy4-footer-desc { font-size: 14px; color: var(--vuy4-text-muted); margin-top: 15px; max-width: 400px; }
.vuy4-footer-title { font-family: var(--vuy4-font-head); font-size: 18px; color: #fff; margin-bottom: 15px; }
.vuy4-links-list { display: flex; flex-direction: column; gap: 10px; }
.vuy4-links-list a { font-size: 14px; color: var(--vuy4-text-muted); }
.vuy4-links-list a:hover { color: var(--vuy4-accent); }
.vuy4-footer-legal { border-top: 1px solid var(--vuy4-border); padding-top: 20px; text-align: center; font-size: 12px; color: #64748b; }
.vuy4-footer-legal p { margin-bottom: 5px; }

/* =========================================
   RESPONSIVE BREAKPOINTS (MOBILE & TABLET)
   ========================================= */

/* Mobile Specific Rules (Strictly max-width 600px) */
@media (max-width: 600px) {
  .vuy4-hero-title { font-size: 26px; }
  .vuy4-hero-slogan { font-size: 16px; }
  .vuy4-metrics-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .vuy4-metric-box { padding: 15px 10px; }
  .vuy4-metric-val { font-size: 20px; }
  .vuy4-tab-nav { flex-direction: column; }
  .vuy4-tab-btn { text-align: center; }
  .vuy4-card-grid, .vuy4-benefits-grid, .vuy4-steps-grid { grid-template-columns: 1fr; }
  .vuy4-article { padding: 15px; }
  .vuy4-page-title { font-size: 24px; }
}

/* Tablet (min-width 601px to 991px) */
@media (min-width: 601px) and (max-width: 991px) {
  .vuy4-header-inner { flex-direction: row; justify-content: space-between; }
  .vuy4-nav-list { flex-direction: row; gap: 15px; }
  .vuy4-hero-grid { grid-template-columns: 1fr; text-align: center; }
  .vuy4-metrics-grid { grid-template-columns: repeat(4, 1fr); }
  .vuy4-tab-nav { flex-direction: row; justify-content: center; }
  .vuy4-card-grid { grid-template-columns: repeat(2, 1fr); }
  .vuy4-benefits-grid, .vuy4-steps-grid { grid-template-columns: repeat(3, 1fr); }
  .vuy4-footer-grid { grid-template-columns: 1fr 1fr; }
}

/* Desktop (min-width 992px) */
@media (min-width: 992px) {
  .vuy4-header-inner { flex-direction: row; justify-content: space-between; }
  .vuy4-nav-list { flex-direction: row; gap: 20px; }
  .vuy4-hero-grid { grid-template-columns: 1fr 1fr; text-align: left; }
  .vuy4-hero-title { font-size: 42px; }
  .vuy4-metrics-grid { grid-template-columns: repeat(4, 1fr); }
  .vuy4-tab-nav { flex-direction: row; justify-content: center; }
  .vuy4-card-grid { grid-template-columns: repeat(4, 1fr); gap: 20px; }
  .vuy4-benefits-grid, .vuy4-steps-grid { grid-template-columns: repeat(3, 1fr); }
  .vuy4-page-layout { grid-template-columns: 2fr 1fr; align-items: start; }
  .vuy4-footer-grid { grid-template-columns: 2fr 1fr; }
}