/* roulang page: index */
:root {
  --glass-bg: rgba(255,255,255,0.12);
  --glass-border: rgba(255,255,255,0.25);
  --glass-shadow: 0 8px 32px rgba(0,0,0,0.08);
  --nav-height: 72px;
  --radius-card: 16px;
  --radius-btn: 10px;
  --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  line-height: 1.7;
  background-color: #f8fafc;
  color: #1e293b;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-smooth);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button,
input,
textarea {
  font-family: inherit;
  font-size: inherit;
  outline: none;
  border: none;
}
button {
  cursor: pointer;
}
ul, ol {
  list-style: none;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}
@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
}
.section-pad {
  padding-top: 100px;
  padding-bottom: 100px;
}
@media (max-width: 768px) {
  .section-pad {
    padding-top: 60px;
    padding-bottom: 60px;
  }
}
.nav-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: var(--transition-smooth);
}
.nav-solid {
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(20px) saturate(200%);
  -webkit-backdrop-filter: blur(20px) saturate(200%);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}
.nav-link {
  position: relative;
  font-weight: 500;
  padding: 8px 4px;
  transition: var(--transition-smooth);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2.5px;
  background: linear-gradient(135deg, #3b82f6, #d946ef);
  border-radius: 4px;
  transition: var(--transition-smooth);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}
.nav-link.active {
  color: #2563eb;
}
.hero-overlay {
  position: relative;
  isolation: isolate;
}
.hero-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,23,42,0.72) 0%, rgba(30,27,75,0.60) 50%, rgba(15,23,42,0.40) 100%);
  z-index: 1;
}
.hero-overlay > * {
  position: relative;
  z-index: 2;
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.card-shadow {
  box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
  transition: var(--transition-smooth);
}
.card-shadow:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.06), 0 12px 40px rgba(0,0,0,0.08);
  transform: translateY(-4px);
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 36px;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-btn);
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff;
  box-shadow: 0 4px 16px rgba(59,130,246,0.35);
  transition: var(--transition-smooth);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  box-shadow: 0 8px 28px rgba(59,130,246,0.45);
  transform: translateY(-2px);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(59,130,246,0.30);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 36px;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-btn);
  background: rgba(255,255,255,0.18);
  backdrop-filter: blur(8px);
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.30);
  transition: var(--transition-smooth);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.28);
  border-color: rgba(255,255,255,0.50);
  transform: translateY(-2px);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-btn);
  background: transparent;
  color: #3b82f6;
  border: 2px solid #3b82f6;
  transition: var(--transition-smooth);
}
.btn-outline:hover {
  background: #3b82f6;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(59,130,246,0.25);
}
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  font-size: 0.8rem;
  font-weight: 500;
  border-radius: 999px;
  background: rgba(59,130,246,0.12);
  color: #2563eb;
  border: 1px solid rgba(59,130,246,0.18);
}
.badge-purple {
  background: rgba(168,85,247,0.12);
  color: #9333ea;
  border-color: rgba(168,85,247,0.18);
}
.badge-amber {
  background: rgba(245,158,11,0.12);
  color: #d97706;
  border-color: rgba(245,158,11,0.18);
}
.badge-emerald {
  background: rgba(16,185,129,0.12);
  color: #059669;
  border-color: rgba(16,185,129,0.18);
}
.card-img-cover {
  width: 100%;
  height: 200px;
  object-fit: cover;
  object-position: center;
  border-radius: var(--radius-card) var(--radius-card) 0 0;
}
@media (max-width: 640px) {
  .card-img-cover {
    height: 160px;
  }
}
.faq-item {
  border-bottom: 1px solid rgba(0,0,0,0.06);
  padding: 20px 0;
  transition: var(--transition-smooth);
}
.faq-item:first-child {
  padding-top: 0;
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  padding: 4px 0;
  user-select: none;
  gap: 16px;
}
.faq-question i {
  font-size: 0.9rem;
  color: #94a3b8;
  transition: var(--transition-smooth);
  flex-shrink: 0;
}
.faq-item.open .faq-question i {
  transform: rotate(180deg);
  color: #3b82f6;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding-top: 0;
  color: #64748b;
  line-height: 1.8;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding-top: 14px;
}
.footer-link {
  color: #94a3b8;
  transition: var(--transition-smooth);
  position: relative;
  padding-bottom: 2px;
}
.footer-link:hover {
  color: #fff;
}
.footer-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: #3b82f6;
  transition: var(--transition-smooth);
}
.footer-link:hover::after {
  width: 100%;
}
.stats-number {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.1;
  background: linear-gradient(135deg, #3b82f6, #d946ef);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
@media (max-width: 768px) {
  .stats-number {
    font-size: 2.2rem;
  }
}
.step-card {
  text-align: center;
  padding: 32px 20px;
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
  transition: var(--transition-smooth);
  position: relative;
}
.step-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}
.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  color: #3b82f6;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 16px;
  transition: var(--transition-smooth);
}
.step-card:hover .step-number {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff;
  box-shadow: 0 4px 16px rgba(59,130,246,0.30);
}
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: #1e293b;
  padding: 8px;
  cursor: pointer;
  transition: var(--transition-smooth);
}
@media (max-width: 768px) {
  .mobile-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    padding: 20px 24px;
    flex-direction: column;
    gap: 12px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.08);
    border-bottom: 1px solid rgba(0,0,0,0.06);
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition-smooth);
    pointer-events: none;
    z-index: 99;
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-menu .nav-link {
    padding: 10px 0;
    font-size: 1.1rem;
    width: 100%;
    border-bottom: 1px solid rgba(0,0,0,0.04);
  }
}
@media (min-width: 769px) {
  .nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
  }
}
.overflow-hidden {
  overflow: hidden;
}
.focus-ring:focus-visible {
  outline: 2.5px solid #3b82f6;
  outline-offset: 3px;
  border-radius: 4px;
}
.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: #0f172a;
}
@media (max-width: 768px) {
  .section-title {
    font-size: 1.7rem;
  }
}
.section-subtitle {
  font-size: 1.1rem;
  color: #64748b;
  max-width: 640px;
  margin-top: 8px;
}
.bg-grid {
  background-image: radial-gradient(rgba(59,130,246,0.06) 1px, transparent 1px);
  background-size: 28px 28px;
}
.bg-glow {
  position: absolute;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.30;
  pointer-events: none;
  z-index: 0;
}
@media (max-width: 768px) {
  .bg-glow {
    width: 240px;
    height: 240px;
    filter: blur(80px);
  }
}
.news-card {
  background: #fff;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}
.news-card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.news-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #0f172a;
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card-excerpt {
  font-size: 0.9rem;
  color: #64748b;
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}
.news-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
  color: #94a3b8;
}
.cta-section {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  position: relative;
  isolation: isolate;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(59,130,246,0.15) 0%, transparent 70%),
              radial-gradient(ellipse at 80% 50%, rgba(168,85,247,0.10) 0%, transparent 70%);
  z-index: 1;
}
.cta-section > * {
  position: relative;
  z-index: 2;
}

/* roulang page: article */
:root {
            --brand-50: #eef2ff;
            --brand-100: #e0e7ff;
            --brand-200: #c7d2fe;
            --brand-300: #a5b4fc;
            --brand-400: #818cf8;
            --brand-500: #6366f1;
            --brand-600: #4f46e5;
            --brand-700: #4338ca;
            --brand-800: #3730a3;
            --brand-900: #312e81;
            --accent-400: #f59e0b;
            --accent-500: #d97706;
            --accent-600: #b45309;
            --slate-50: #f8fafc;
            --slate-100: #f1f5f9;
            --slate-200: #e2e8f0;
            --slate-300: #cbd5e1;
            --slate-400: #94a3b8;
            --slate-500: #64748b;
            --slate-600: #475569;
            --slate-700: #334155;
            --slate-800: #1e293b;
            --slate-900: #0f172a;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
        }
        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth}
        body{font-family:'Inter','PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;background:var(--slate-50);color:var(--slate-800);line-height:1.7;-webkit-font-smoothing:antialiased}
        a{color:inherit;text-decoration:none;transition:var(--transition)}
        img{max-width:100%;height:auto;display:block;border-radius:var(--radius-sm)}
        .container{max-width:1280px;margin:0 auto;padding:0 24px}
        @media(max-width:768px){.container{padding:0 16px}}
        .section{padding:80px 0}
        @media(max-width:768px){.section{padding:48px 0}}
        .section-title{font-size:2rem;font-weight:800;letter-spacing:-0.02em;color:var(--slate-900);margin-bottom:0.75rem}
        @media(max-width:768px){.section-title{font-size:1.6rem}}
        .section-sub{font-size:1.1rem;color:var(--slate-500);max-width:640px;line-height:1.7}
        .glass-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.72);backdrop-filter:blur(16px) saturate(180%);-webkit-backdrop-filter:blur(16px) saturate(180%);border-bottom:1px solid rgba(99,102,241,0.08);box-shadow:0 1px 8px rgba(0,0,0,0.04);transition:var(--transition)}
        .glass-header.scrolled{background:rgba(255,255,255,0.92);box-shadow:0 4px 24px rgba(0,0,0,0.08)}
        .nav-link{position:relative;font-weight:500;font-size:0.95rem;padding:8px 4px;color:var(--slate-600);transition:var(--transition);white-space:nowrap}
        .nav-link::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2.5px;border-radius:4px;background:linear-gradient(135deg,var(--brand-500),var(--accent-500));transition:var(--transition)}
        .nav-link:hover{color:var(--brand-600)}
        .nav-link:hover::after{width:100%}
        .nav-link.active{color:var(--brand-600)}
        .nav-link.active::after{width:100%}
        .btn-primary{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--radius-sm);font-weight:600;font-size:0.95rem;color:#fff;background:linear-gradient(135deg,var(--brand-500),var(--brand-700));border:none;cursor:pointer;transition:var(--transition);box-shadow:0 4px 14px rgba(99,102,241,0.3)}
        .btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(99,102,241,0.4);background:linear-gradient(135deg,var(--brand-600),var(--brand-800))}
        .btn-primary:active{transform:translateY(0);box-shadow:0 2px 8px rgba(99,102,241,0.2)}
        .btn-outline{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--radius-sm);font-weight:600;font-size:0.95rem;color:var(--brand-600);background:transparent;border:2px solid var(--brand-200);cursor:pointer;transition:var(--transition)}
        .btn-outline:hover{background:var(--brand-50);border-color:var(--brand-400);transform:translateY(-2px);box-shadow:0 4px 16px rgba(99,102,241,0.1)}
        .badge{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:100px;font-size:0.8rem;font-weight:600;background:var(--brand-100);color:var(--brand-700);transition:var(--transition)}
        .badge-accent{background:#fef3c7;color:#b45309}
        .badge-green{background:#d1fae5;color:#065f46}
        .badge-blue{background:#dbeafe;color:#1e40af}
        .card{border-radius:var(--radius);background:#fff;border:1px solid var(--slate-200);overflow:hidden;transition:var(--transition);box-shadow:var(--shadow-sm)}
        .card:hover{box-shadow:var(--shadow);transform:translateY(-4px);border-color:var(--brand-200)}
        .card-img{width:100%;aspect-ratio:16/10;object-fit:cover;display:block;transition:var(--transition)}
        .card:hover .card-img{transform:scale(1.03)}
        .article-body h2{font-size:1.6rem;font-weight:700;margin:2rem 0 1rem;color:var(--slate-900);letter-spacing:-0.01em}
        .article-body h3{font-size:1.25rem;font-weight:600;margin:1.5rem 0 0.75rem;color:var(--slate-800)}
        .article-body p{font-size:1.05rem;line-height:1.85;color:var(--slate-600);margin-bottom:1.25rem}
        .article-body ul,.article-body ol{padding-left:1.5rem;margin-bottom:1.25rem;color:var(--slate-600)}
        .article-body li{margin-bottom:0.5rem;font-size:1.02rem}
        .article-body blockquote{border-left:4px solid var(--brand-400);padding:1rem 1.5rem;margin:1.5rem 0;background:var(--brand-50);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--slate-700);font-style:italic}
        .article-body a{color:var(--brand-600);border-bottom:1px solid var(--brand-200)}
        .article-body a:hover{color:var(--brand-800);border-bottom-color:var(--brand-500)}
        .article-body img{border-radius:var(--radius);margin:1.5rem 0;box-shadow:var(--shadow-sm)}
        .article-body .highlight-box{padding:1.5rem 2rem;background:linear-gradient(135deg,var(--brand-50),#fef3c7);border-radius:var(--radius);border-left:4px solid var(--accent-400);margin:1.5rem 0}
        .footer-link{color:var(--slate-400);transition:var(--transition);position:relative}
        .footer-link:hover{color:#fff;padding-left:4px}
        .mobile-menu-btn{display:none;background:none;border:none;font-size:1.5rem;color:var(--slate-700);cursor:pointer;padding:4px 8px;border-radius:var(--radius-sm);transition:var(--transition)}
        .mobile-menu-btn:hover{background:var(--slate-100)}
        @media(max-width:768px){
            .mobile-menu-btn{display:block}
            .nav-menu{display:none;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:rgba(255,255,255,0.98);backdrop-filter:blur(16px);padding:16px 24px;border-bottom:1px solid var(--slate-200);box-shadow:var(--shadow);border-radius:0 0 var(--radius) var(--radius)}
            .nav-menu.open{display:flex}
            .nav-link{padding:12px 0;font-size:1.05rem}
        }
        .share-btn{width:40px;height:40px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:var(--slate-100);color:var(--slate-600);transition:var(--transition);font-size:1rem}
        .share-btn:hover{background:var(--brand-100);color:var(--brand-600);transform:translateY(-2px)}
        .tag-pill{padding:4px 14px;border-radius:100px;background:var(--slate-100);color:var(--slate-600);font-size:0.82rem;font-weight:500;transition:var(--transition)}
        .tag-pill:hover{background:var(--brand-100);color:var(--brand-600)}
        .breadcrumb{display:flex;align-items:center;gap:8px;font-size:0.9rem;color:var(--slate-400);flex-wrap:wrap}
        .breadcrumb a{color:var(--slate-500);transition:var(--transition)}
        .breadcrumb a:hover{color:var(--brand-600)}
        .breadcrumb span{color:var(--slate-700)}
        .hero-overlay{position:relative;overflow:hidden}
        .hero-overlay::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(15,23,42,0.88) 0%,rgba(30,27,75,0.72) 100%);z-index:1}
        .hero-overlay .hero-content{position:relative;z-index:2}
        .related-card{border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--slate-200);transition:var(--transition);box-shadow:var(--shadow-sm)}
        .related-card:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:var(--brand-200)}
        .related-card img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:var(--transition)}
        .related-card:hover img{transform:scale(1.03)}
        .divider{height:1px;background:linear-gradient(90deg,transparent,var(--slate-200),transparent);margin:2rem 0}
        @media(max-width:640px){
            .article-body h2{font-size:1.35rem}
            .article-body p{font-size:1rem}
            .section-title{font-size:1.4rem}
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --brand-50: #eef2ff;
            --brand-100: #e0e7ff;
            --brand-200: #c7d2fe;
            --brand-300: #a5b4fc;
            --brand-400: #818cf8;
            --brand-500: #6366f1;
            --brand-600: #4f46e5;
            --brand-700: #4338ca;
            --brand-800: #3730a3;
            --brand-900: #312e81;
            --accent-500: #ec4899;
            --accent-600: #db2777;
            --slate-50: #f8fafc;
            --slate-100: #f1f5f9;
            --slate-200: #e2e8f0;
            --slate-300: #cbd5e1;
            --slate-400: #94a3b8;
            --slate-500: #64748b;
            --slate-600: #475569;
            --slate-700: #334155;
            --slate-800: #1e293b;
            --slate-900: #0f172a;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.12);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
        }

        /* ===== Base Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            line-height: 1.6;
            color: var(--slate-800);
            background: var(--slate-50);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            transition: all 0.25s ease;
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        a:focus-visible {
            outline: 3px solid var(--brand-400);
            outline-offset: 2px;
            border-radius: 4px;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Navigation (Glass Immersive) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 12px 0;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.25);
            box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px) saturate(200%);
            -webkit-backdrop-filter: blur(20px) saturate(200%);
            border-bottom: 1px solid rgba(0, 0, 0, 0.06);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
            padding: 6px 0;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--slate-900);
            transition: opacity 0.2s;
        }
        .logo-wrap:hover {
            opacity: 0.85;
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius);
            background: linear-gradient(135deg, var(--brand-500), var(--accent-500));
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
            flex-shrink: 0;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            padding: 8px 18px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--slate-700);
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            position: relative;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--brand-600);
            background: rgba(99, 102, 241, 0.06);
        }
        .nav-link.active {
            color: var(--brand-600);
            background: rgba(99, 102, 241, 0.10);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--brand-500);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
            white-space: nowrap;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(99, 102, 241, 0.35);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(99, 102, 241, 0.25);
        }
        .btn-primary-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--brand-600);
            background: transparent;
            border: 2px solid var(--brand-500);
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .btn-primary-outline:hover {
            background: var(--brand-50);
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(99, 102, 241, 0.15);
        }

        /* Mobile menu toggle */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px 10px;
            border: none;
            background: transparent;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .menu-toggle:hover {
            background: rgba(0, 0, 0, 0.04);
        }
        .menu-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            border-radius: 4px;
            background: var(--slate-700);
            transition: all 0.3s ease;
        }
        .menu-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .menu-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .menu-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            min-height: 48vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 120px 0 80px;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.70), rgba(30, 27, 75, 0.75)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: #fff;
            text-align: center;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(99, 102, 241, 0.20), transparent 70%);
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 18px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
        }
        .category-hero h1 span {
            display: inline-block;
            background: linear-gradient(135deg, #a5b4fc, #f0abfc);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 32px;
            line-height: 1.7;
            text-shadow: 0 1px 8px rgba(0, 0, 0, 0.15);
        }
        .hero-breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            background: rgba(255, 255, 255, 0.10);
            backdrop-filter: blur(8px);
            border-radius: 50px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 24px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color 0.2s;
        }
        .hero-breadcrumb a:hover {
            color: #fff;
        }
        .hero-breadcrumb .sep {
            color: rgba(255, 255, 255, 0.35);
        }
        .hero-breadcrumb .current {
            color: #fff;
            font-weight: 500;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            font-size: clamp(1.5rem, 3vw, 2.1rem);
            font-weight: 700;
            letter-spacing: -0.015em;
            line-height: 1.3;
            color: var(--slate-900);
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--slate-500);
            max-width: 600px;
            line-height: 1.7;
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header .section-subtitle {
            margin: 0 auto;
        }

        /* ===== Cards ===== */
        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--slate-100);
            overflow: hidden;
            transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--brand-100);
        }
        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 24px 26px 28px;
        }
        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--slate-900);
        }
        .card-body p {
            font-size: 0.92rem;
            color: var(--slate-500);
            line-height: 1.7;
        }
        .card-tag {
            display: inline-block;
            padding: 3px 12px;
            font-size: 0.75rem;
            font-weight: 500;
            border-radius: 50px;
            background: var(--brand-50);
            color: var(--brand-600);
            margin-bottom: 12px;
        }

        /* ===== Grid ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        /* ===== Steps / Timeline ===== */
        .steps-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            position: relative;
            counter-increment: step;
        }
        .step-item:not(:last-child)::after {
            content: '';
            position: absolute;
            top: 44px;
            right: -16px;
            width: calc(100% - 40px);
            height: 2px;
            background: linear-gradient(to right, var(--brand-200), var(--brand-300));
            z-index: 0;
        }
        .step-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 72px;
            height: 72px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
            color: #fff;
            font-size: 1.6rem;
            font-weight: 700;
            box-shadow: 0 8px 28px rgba(99, 102, 241, 0.25);
            position: relative;
            z-index: 1;
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--slate-900);
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--slate-500);
            line-height: 1.6;
            max-width: 220px;
            margin: 0 auto;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 840px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--slate-100);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .faq-item:hover {
            border-color: var(--brand-100);
            box-shadow: var(--shadow);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--slate-800);
            cursor: pointer;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
        }
        .faq-question .icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--brand-50);
            color: var(--brand-600);
            font-size: 0.85rem;
            transition: all 0.3s ease;
        }
        .faq-question.open .icon {
            transform: rotate(180deg);
            background: var(--brand-500);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--slate-500);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--slate-900), #1e1b4b);
            color: #fff;
            text-align: center;
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 100%, rgba(99, 102, 241, 0.15), transparent 70%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: -0.015em;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--slate-900);
            color: rgba(255, 255, 255, 0.8);
            padding: 64px 0 28px;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo-wrap {
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--slate-400);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
            color: var(--slate-400);
            font-size: 1rem;
            transition: all 0.3s ease;
        }
        .footer-social a:hover {
            background: var(--brand-600);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: var(--slate-400);
            transition: color 0.25s ease;
        }
        .footer-col ul li a:hover {
            color: var(--brand-300);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            font-size: 0.85rem;
            color: var(--slate-500);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: var(--slate-400);
        }
        .footer-bottom a:hover {
            color: var(--brand-300);
        }

        /* ===== Badge / Label ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            font-size: 0.78rem;
            font-weight: 500;
            border-radius: 50px;
            background: var(--brand-50);
            color: var(--brand-600);
            border: 1px solid var(--brand-100);
        }
        .badge-accent {
            background: #fdf2f8;
            color: var(--accent-600);
            border-color: #fce7f3;
        }

        /* ===== Feature List ===== */
        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .feature-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px 20px;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--slate-100);
            transition: all 0.25s ease;
        }
        .feature-item:hover {
            border-color: var(--brand-100);
            box-shadow: var(--shadow-sm);
        }
        .feature-icon {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--brand-50);
            color: var(--brand-600);
            font-size: 1.1rem;
        }
        .feature-text h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--slate-900);
            margin-bottom: 2px;
        }
        .feature-text p {
            font-size: 0.9rem;
            color: var(--slate-500);
            line-height: 1.6;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-wrap {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px 28px;
            }
            .step-item:not(:last-child)::after {
                display: none;
            }
            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }
            .nav-menu {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 16px 24px;
                border-bottom: 1px solid var(--slate-100);
                box-shadow: var(--shadow-lg);
                gap: 4px;
                display: none;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-link {
                padding: 12px 16px;
                font-size: 1rem;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-menu .btn-primary {
                margin-top: 8px;
                width: 100%;
                justify-content: center;
            }
            .category-hero {
                min-height: 40vh;
                padding: 100px 0 60px;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-hero p {
                font-size: 1rem;
            }
            .section {
                padding: 56px 0;
            }
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .step-item {
                max-width: 360px;
                margin: 0 auto;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }
            .faq-answer.open {
                padding: 0 18px 16px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }
            .card-body {
                padding: 18px 20px 22px;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .category-hero p {
                font-size: 0.92rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .btn-primary,
            .btn-primary-outline {
                padding: 8px 18px;
                font-size: 0.85rem;
            }
            .card-img {
                height: 160px;
            }
            .step-number {
                width: 60px;
                height: 60px;
                font-size: 1.3rem;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--slate-100);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--slate-300);
            border-radius: 12px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--slate-400);
        }