:root {
      --primary: #2c5282;
      --primary-dark: #2a5298;
      --accent: #d4a84b;
      --accent-light: #e4c77a;
      --white: #ffffff;
      --light: #f8fafc;
      --dark: #1e3a5f;
      --gray: #6b7280;
      --shadow: 0 4px 20px rgba(13,27,42,0.15);
      --shadow-lg: 0 10px 40px rgba(13,27,42,0.2);
      --transition: all 0.3s ease;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }

    body {
      font-family: 'Segoe UI', Arial, sans-serif;
      color: var(--dark);
      background: var(--white);
      line-height: 1.7;
    }
    a { text-decoration: none; color: inherit; }
    img { max-width: 100%; height: auto; }
    .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

    /* Header */
    header { background: #2c5282; box-shadow: 0 2px 12px rgba(0,0,0,0.2); position: sticky; top: 0; z-index: 1000; }
    nav { display: flex; justify-content: space-between; align-items: center; padding: 12px 24px; max-width: 1200px; margin: 0 auto; }
    .logo { display: flex; align-items: center; gap: 12px; }
    .logo-icon { width: 44px; height: 44px; background: #d4a84b; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #2c5282; font-weight: 800; font-size: 24px; }
    .logo-text span { font-weight: 800; font-size: 18px; color: #fff; display: block; }
    .logo-text small { font-size: 10px; color: rgba(255,255,255,0.75); letter-spacing: 0.5px; }
    .nav-links { display: flex; list-style: none; gap: 8px; align-items: center; }
    .nav-links a { font-weight: 500; font-size: 14px; color: rgba(255,255,255,0.88); padding: 8px 14px; border-radius: 6px; transition: var(--transition); }
    .nav-links a:hover, .nav-links a.active { background: rgba(255,255,255,0.15); color: #fff; }
    .nav-links a.active::after { content: ''; position: absolute; bottom: -4px; left: 0; right: 0; height: 2px; background: var(--accent); border-radius: 1px; }
    .nav-cta { background: #1a3c6e; color: #ffffff !important; padding: 10px 20px; border-radius: 6px; font-weight: 700 !important; }
    .nav-cta:hover { background: #2a4a7a; }
    .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
    .hamburger span { width: 24px; height: 2px; background: #fff; transition: var(--transition); }

    /* 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);
    }

    /* Breadcrumb */
    .breadcrumb { background: var(--light); padding: 12px 0; border-bottom: 1px solid rgba(26,60,110,0.08); }
    .breadcrumb-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; font-size: 13px; color: var(--gray); }
    .breadcrumb-inner a { color: var(--primary); text-decoration: none; }
    .breadcrumb-inner a:hover { text-decoration: underline; }
    .breadcrumb-sep { margin: 0 8px; color: var(--gray); }

    /* Hero */
    .page-hero { background: linear-gradient(135deg, #0e2247 0%, #1a3c6e 50%, #0e2247 100%); color: var(--white); padding: 80px 0 60px; text-align: center; position: relative; }
    .page-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;
    }
    .page-hero > * { position: relative; z-index: 1; }
    .page-hero h1 { font-size: 42px; font-weight: 800; margin-bottom: 16px; }
    .page-hero h1 em { color: var(--accent); font-style: normal; }
    .page-hero p { font-size: 18px; color: rgba(255,255,255,0.85); max-width: 640px; margin: 0 auto 32px; }
    .hero-stats { display: flex; justify-content: center; gap: 48px; margin-top: 40px; }
    .hero-stat { text-align: center; }
    .hero-stat .number { font-size: 36px; font-weight: 800; color: var(--accent); }
    .hero-stat .label { font-size: 13px; color: rgba(255,255,255,0.7); text-transform: uppercase; letter-spacing: 0.5px; }

    /* Section */
    .section { padding: 72px 0; }
    .section-tag { display: inline-block; background: rgba(26,60,110,0.08); color: var(--primary); padding: 6px 14px; border-radius: 20px; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 16px; }
    .section-title { font-size: 36px; font-weight: 800; color: var(--dark); margin-bottom: 16px; }
    .section-title em { color: var(--primary); font-style: normal; }
    .section-sub { font-size: 17px; color: var(--gray); max-width: 640px; }

    /* Category Tabs */
    .category-tabs { display: flex; gap: 10px; margin: 32px 0; flex-wrap: wrap; }
    .category-tab { padding: 12px 24px; border-radius: 50px; font-size: 14px; font-weight: 600; cursor: pointer; transition: var(--transition); background: var(--light); color: var(--gray); border: 2px solid transparent; }
    .category-tab.active, .category-tab:hover { background: var(--primary); color: var(--white); }

    /* Catalog Grid */
    .catalog-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .catalog-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); display: flex; flex-direction: column; }
    .catalog-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
    .catalog-card .catalog-img { background: linear-gradient(135deg, #f8fafc, #e8edf5); padding: 32px; display: flex; align-items: center; justify-content: center; height: 220px; }
    .catalog-card .catalog-img img { max-height: 100%; max-width: 100%; object-fit: contain; transition: var(--transition); }
    .catalog-card:hover .catalog-img img { transform: scale(1.05); }
    .catalog-card .catalog-info { padding: 24px; display: flex; flex-direction: column; flex: 1; }
    .catalog-card .catalog-tag { display: inline-block; background: rgba(26,60,110,0.08); color: var(--primary); padding: 4px 12px; border-radius: 20px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 12px; }
    .catalog-card .catalog-tag.hot { background: rgba(232,160,32,0.15); color: #b8860b; }
    .catalog-card h3 { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
    .catalog-card p { font-size: 14px; color: var(--gray); margin-bottom: 16px; line-height: 1.5; flex: 1; }
    .catalog-card .specs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
    .catalog-card .spec { font-size: 12px; background: var(--light); padding: 4px 10px; border-radius: 4px; color: var(--gray); }
    .catalog-btn { display: inline-block; background: var(--primary); color: var(--white); padding: 10px 20px; border-radius: 6px; font-size: 13px; font-weight: 600; transition: var(--transition); margin-top: auto; align-self: flex-start; }
    .catalog-btn:hover { background: var(--primary-dark); }

    /* Features */
    .features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin-top: 48px; }
    .feature-card { background: var(--white); padding: 32px; border-radius: 16px; box-shadow: var(--shadow); }
    .feature-card .icon { font-size: 40px; margin-bottom: 16px; }
    .feature-card h3, .feature-card h4 { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
    .feature-card p { font-size: 14px; color: var(--gray); line-height: 1.6; }

    /* CTA Section */
    .cta-section { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); padding: 80px 0; text-align: center; color: var(--white); }
    .cta-section h2 { font-size: 32px; font-weight: 800; margin-bottom: 16px; }
    .cta-section p { font-size: 17px; color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 32px; }
    .cta-btn { display: inline-block; background: #1a3c6e; color: #ffffff; padding: 16px 32px; border-radius: 8px; font-size: 16px; font-weight: 700; transition: var(--transition); }
    .cta-btn:hover { background: #2a4a7a; transform: translateY(-2px); }

    /* ===== 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); }
    }

    @media (max-width: 768px) {
      .footer-content { grid-template-columns: 1fr; }
      .lang-switcher { margin-left: 8px; padding-left: 8px; }
    }

    @media (max-width: 1024px) {
      .catalog-grid { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 768px) {
      .catalog-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 480px) {
      .catalog-grid { grid-template-columns: 1fr; }
    }

    /* ===== FLOATING CTA ===== */
    .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); box-shadow: 0 10px 28px rgba(0,0,0,0.2); }
    .float-wa { background: #146c3c !important; color: #ffffff !important; box-shadow: 0 4px 18px rgba(20,108,60,0.35); }
    .float-wa:hover { box-shadow: 0 10px 28px rgba(37,211,102,0.45); }
  
    /* ===== 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; }




    .nav-links.open { display: flex; }



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

/* ===== 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; }