:root {
      --primary: #2c5282;
      --accent: #d4a84b;
      --dark: #2c5282;
      --light: #f8fafc;
      --white: #ffffff;
      --gray: #6b7280;
      --shadow: 0 4px 20px rgba(30,58,95,0.08);
      --transition: all 0.3s ease;
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    body {
      font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
      line-height: 1.6;
      color: #333;
      background: var(--light);
    }

    /* Header */
    header {
      background: #1e3a5f;
      box-shadow: 0 2px 12px rgba(0,0,0,0.2);
      position: fixed;
      width: 100%;
      top: 0;
      z-index: 1000;
    }

    /* Breadcrumb */
    .breadcrumb { background: var(--light); padding: 12px 0; border-bottom: 1px solid rgba(26,60,110,0.08); margin-top: 72px; }
    .breadcrumb-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; font-size: 13px; color: var(--gray); }
    .breadcrumb-inner a { color: var(--primary); }
    .breadcrumb-inner a:hover { text-decoration: underline; }
    .breadcrumb-sep { margin: 0 8px; color: var(--gray); }

    nav {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }

    .logo {
      font-size: 20px;
      font-weight: 700;
      color: #fff;
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    header .logo::before {
      content: 'A';
      width: 44px;
      height: 44px;
      background: #d4a84b;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      font-weight: 800;
      color: #1e3a5f;
    }

    .nav-links {
      display: flex;
      list-style: none;
      gap: 8px;
      align-items: center;
    }

    .nav-links a {
      text-decoration: none;
      color: rgba(255,255,255,0.88);
      font-weight: 500;
      font-size: 14px;
      padding: 8px 14px;
      border-radius: 6px;
      transition: var(--transition);
    }

    .nav-links a:hover { background: rgba(255,255,255,0.15); color: #fff; }
    .nav-links a.active { color: #fff; }

    .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
    .hamburger span { display: block; width: 24px; height: 2px; background: #fff; border-radius: 2px; }

    .nav-cta {
      background: #d4a84b;
      color: #1e3a5f !important;
      padding: 10px 20px;
      border-radius: 6px;
      font-weight: 700;
    }

    .nav-cta:hover {
      background: #d49010;
      transform: translateY(-2px);
    }

    /* Language Switcher */
    .lang-switcher {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: 16px;
      padding-left: 16px;
      border-left: 1px solid rgba(255,255,255,0.2);
    }

    .lang-switcher a {
      font-size: 14px;
      font-weight: 500;
      padding: 6px 12px;
      border-radius: 6px;
      color: rgba(255,255,255,0.8);
      transition: var(--transition);
    }

    .lang-switcher a.active {
      background: rgba(255,255,255,0.25);
      color: var(--white);
      box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    }

    .lang-switcher a:hover:not(.active) {
      color: var(--white);
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, #0e2247 0%, #1a3c6e 50%, #0e2247 100%);
      color: var(--white);
      padding: 140px 24px 80px;
      text-align: center;
      position: relative;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 800"><circle cx="1100" cy="150" r="300" fill="rgba(232,160,32,0.07)"/><circle cx="200" cy="600" r="250" fill="rgba(232,160,32,0.05)"/><circle cx="900" cy="700" r="180" fill="rgba(255,255,255,0.03)"/></svg>') center/cover no-repeat;
    }

    .hero > * { position: relative; z-index: 1; }

    .hero h1 {
      font-size: 42px;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.2;
    }

    .hero h1 span { color: var(--accent); }

    .hero p {
      font-size: 18px;
      opacity: 0.9;
      max-width: 700px;
      margin: 0 auto 32px;
    }

    .hero-badges {
      display: flex;
      justify-content: center;
      gap: 24px;
      flex-wrap: wrap;
      margin-top: 24px;
    }

    .hero-badge {
      background: rgba(255,255,255,0.1);
      padding: 12px 20px;
      border-radius: 50px;
      font-size: 14px;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* Container */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* Section */
    section { padding: 80px 0; }

    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-title h2 {
      font-size: 36px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 12px;
    }

    .section-title p {
      color: var(--gray);
      font-size: 16px;
      max-width: 600px;
      margin: 0 auto;
    }

    /* Product Grid */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 28px;
    }

    .product-card {
      background: var(--white);
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--shadow);
      transition: var(--transition);
      border: 1px solid rgba(26,60,110,0.06);
    }

    .product-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 16px 48px rgba(26,60,110,0.15);
    }

    .product-img {
      background: linear-gradient(135deg, #f8fafc, #e8edf5);
      padding: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      height: 260px;
      position: relative;
    }

    .product-img img {
      max-height: 90%;
      max-width: 90%;
      object-fit: contain;
      transition: var(--transition);
    }

    .product-card:hover .product-img img {
      transform: scale(1.08);
    }

    .product-tag {
      position: absolute;
      top: 16px;
      left: 16px;
      background: var(--accent);
      color: var(--primary);
      padding: 6px 12px;
      border-radius: 20px;
      font-size: 11px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .product-info { padding: 24px; }

    .product-info h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }

    .product-info p {
      font-size: 14px;
      color: var(--gray);
      margin-bottom: 16px;
      line-height: 1.5;
    }

    .spec-list {
      list-style: none;
      margin-bottom: 20px;
    }

    .spec-list li {
      font-size: 13px;
      color: #4b5563;
      padding: 6px 0;
      border-bottom: 1px solid #e5e7eb;
      display: flex;
      justify-content: space-between;
    }

    .spec-list li:last-child { border-bottom: none; }
    .spec-label { font-weight: 600; color: var(--dark); }

    .product-btn {
      display: block;
      width: 100%;
      background: var(--primary);
      color: var(--white);
      text-align: center;
      padding: 12px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: 600;
      font-size: 14px;
      transition: var(--transition);
    }

    .product-btn:hover { background: #2a5298; }

    /* Category Filter */
    .category-tabs {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }

    .category-tab {
      padding: 12px 24px;
      border-radius: 50px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      background: var(--white);
      color: var(--gray);
      border: 2px solid transparent;
      box-shadow: var(--shadow);
    }

    .category-tab.active,
    .category-tab:hover {
      background: var(--primary);
      color: var(--white);
    }

    /* Features */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 24px;
      margin-top: 48px;
    }

    .feature-card {
      background: var(--white);
      padding: 28px;
      border-radius: 12px;
      box-shadow: var(--shadow);
      text-align: center;
    }

    .feature-icon {
      width: 48px;
      height: 48px;
      margin: 0 auto 16px;
      color: var(--accent);
    }

    .feature-icon svg {
      width: 100%;
      height: 100%;
    }

    .feature-card h3, .feature-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }

    .feature-card p {
      font-size: 14px;
      color: var(--gray);
    }

    /* CTA Section */
    .cta-section {
      background: linear-gradient(135deg, var(--primary), var(--dark));
      color: var(--white);
      text-align: center;
      padding: 80px 24px;
    }

    .cta-section h2 {
      font-size: 36px;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .cta-section p {
      font-size: 18px;
      opacity: 0.9;
      margin-bottom: 32px;
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }

    .cta-buttons {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .cta-btn {
      padding: 16px 32px;
      border-radius: 8px;
      font-weight: 700;
      text-decoration: none;
      transition: var(--transition);
      font-size: 16px;
    }

    .cta-btn-primary {
      background: #1a3c6e;
      color: #ffffff;
    }

    .cta-btn-primary:hover {
      background: #2a4a7a;
      transform: translateY(-2px);
    }

    .cta-btn-secondary {
      background: transparent;
      color: #ffffff;
      border: 2px solid var(--white);
    }

    .cta-btn-secondary:hover {
      background: var(--white);
      color: var(--primary);
    }

    /* ===== FOOTER ===== */
    footer { background: var(--primary); color: var(--white); padding: 60px 24px 24px; margin-top: 80px; }
    .footer-content { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
    .footer-section h4 { font-size: 16px; font-weight: 700; margin-bottom: 20px; color: #ffffff; }
    .footer-section p, .footer-section li { font-size: 14px; color: rgba(255,255,255,0.8); margin-bottom: 12px; line-height: 1.6; }
    .footer-section a { color: rgba(255,255,255,0.8); transition: var(--transition); }
    .footer-section a:hover { color: var(--accent); }
    .footer-bottom { max-width: 1200px; margin: 40px auto 0; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.1); text-align: center; font-size: 14px; color: rgba(255,255,255,0.95); }

    @media (max-width: 1024px) {
      .footer-content { grid-template-columns: repeat(2, 1fr); }
    }

    /* Responsive */
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .nav-links.open { display: flex; }
      .hamburger { display: flex; }
      .hero h1 { font-size: 28px; }
      .hero p { font-size: 16px; }
      .section-title h2 { font-size: 28px; }
      .product-grid { grid-template-columns: 1fr; }
      .footer-content { grid-template-columns: 1fr; }
      .lang-switcher { margin-left: 8px; padding-left: 8px; }
    }
  
    /* ===== TOPIC CLUSTER DROPDOWN NAV ===== */
    .dropdown { position: relative; }
    .dropdown > a::after,
    .dropbtn::after { content: " ▼"; font-size: 10px; opacity: 0.7; margin-left: 4px; }
    .dropdown-content {
      display: none; position: absolute; top: 100%; left: 0;
      background: var(--primary, #1a1a1a); min-width: 220px;
      box-shadow: 0 12px 30px rgba(0,0,0,0.25); border-radius: 8px;
      padding: 8px 0; list-style: none; z-index: 1000;
    }
    .dropdown-content a {
      display: block; padding: 10px 18px; color: rgba(255,255,255,0.9);
      font-size: 14px; white-space: nowrap; text-decoration: none;
    }
    .dropdown-content a:hover { background: rgba(255,255,255,0.12); color: #fff; }
    .dropdown:hover .dropdown-content { display: block; }
    .dropdown-header {
      padding: 8px 18px; font-size: 12px; text-transform: uppercase;
      letter-spacing: 0.5px; color: var(--accent, #e8a020); font-weight: 700;
    }
    .dropdown-divider { height: 1px; background: rgba(255,255,255,0.12); margin: 6px 0; }
    @media (max-width: 991px) {
      .dropdown-content { position: static; box-shadow: none; background: rgba(0,0,0,0.15); min-width: auto; margin-left: 12px; }
      .dropdown-content a { padding: 8px 16px; }
    }
    button.hamburger { background: transparent; border: none; padding: 8px; }




@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}



.float-btns {
  position: fixed; bottom: 28px; right: 24px;
  display: flex; flex-direction: column; gap: 12px;
  z-index: 999;
}
.float-btn { position: fixed; right: 20px; z-index: 999; background: #1a3c6e; color: #ffffff; border-radius: 50px; padding: 13px 20px; font-size: 14px; font-weight: 700; box-shadow: 0 4px 18px rgba(0,0,0,0.2); transition: var(--transition); text-decoration: none; }
.float-btn:hover { background: #2a4a7a; transform: translateY(-3px); }
.float-wa { background: #146c3c !important; color: #ffffff !important; box-shadow: 0 4px 18px rgba(20,108,60,0.35); }
.float-wa:hover { background: #0f522d !important; }

/* ===== PRODUCT FAQ SECTION ===== */
.product-faq { background: var(--light, #f8fafc); padding: 80px 24px; }
.product-faq .container { max-width: 900px; margin: 0 auto; }
.product-faq h2 { font-size: 32px; font-weight: 800; color: var(--dark, #1e3a5f); text-align: center; margin-bottom: 12px; }
.product-faq .faq-subtitle { text-align: center; color: var(--gray, #6b7280); margin-bottom: 40px; font-size: 16px; }
.faq-simple { display: grid; gap: 16px; }
.faq-simple-item { background: var(--white, #ffffff); border-radius: 12px; box-shadow: 0 4px 20px rgba(13,27,42,0.08); border: 1px solid #e8edf5; overflow: hidden; }
.faq-simple-q { padding: 20px 24px; font-weight: 700; color: var(--dark, #1e3a5f); cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.faq-simple-a { padding: 0 24px 20px; color: var(--gray, #4b5563); line-height: 1.7; }
.faq-simple-a a { color: var(--primary, #2c5282); text-decoration: underline; }