/* roulang page: index */
:root {
      --deep-amber-blue: #0B1A2F;
      --dark-bg-start: #0A111F;
      --dark-bg-end: #0F1A2B;
      --card-bg: rgba(18, 40, 65, 0.7);
      --glass-border: rgba(255, 255, 255, 0.15);
      --energy-gold: #F09B4A;
      --energy-gold-dark: #E57A2E;
      --text-light: #F0F4FA;
      --text-muted: #B0C7DE;
      --text-body: #8FA4BC;
      --footer-bg: #080E17;
      --footer-text: #6B7F94;
      --border-radius-card: 16px;
      --border-radius-hero: 24px;
      --blur-high: 24px;
      --blur-mid: 16px;
      --blur-low: 12px;
      --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
      --spacing-xs: 8px;
      --spacing-sm: 16px;
      --spacing-md: 24px;
      --spacing-lg: 40px;
      --spacing-xl: 60px;
      --spacing-2xl: 80px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-family);
      background: radial-gradient(circle at 30% 10%, #132B44 0%, #0A111F 90%);
      background-attachment: fixed;
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
      position: relative;
    }

    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 5L55 20v30L30 60 5 50V20z' fill='none' stroke='%23ffffff' stroke-opacity='0.04' stroke-width='1'/%3E%3C/svg%3E");
      background-size: 60px 60px;
      pointer-events: none;
      z-index: 0;
    }

    .container, .container-lg, .container-fluid {
      position: relative;
      z-index: 2;
    }

    h1, h2, h3, h4, .h1, .h2, .h3, .h4 {
      color: var(--text-light);
      font-weight: 700;
      line-height: 1.2;
    }

    h1, .h1 {
      font-size: 3rem;
    }
    h2, .h2 {
      font-size: 2.25rem;
    }
    h3, .h3 {
      font-size: 1.5rem;
    }

    .text-muted-custom {
      color: var(--text-muted) !important;
    }

    .bg-glass {
      background: var(--card-bg);
      backdrop-filter: blur(var(--blur-mid));
      -webkit-backdrop-filter: blur(var(--blur-mid));
      border: 1px solid var(--glass-border);
      border-radius: var(--border-radius-card);
    }

    .bg-glass-high {
      background: rgba(18, 40, 65, 0.55);
      backdrop-filter: blur(var(--blur-high));
      -webkit-backdrop-filter: blur(var(--blur-high));
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--border-radius-hero);
    }

    .bg-glass-low {
      background: rgba(18, 40, 65, 0.6);
      backdrop-filter: blur(var(--blur-low));
      -webkit-backdrop-filter: blur(var(--blur-low));
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--border-radius-card);
    }

    .btn-primary-gold {
      background: linear-gradient(135deg, var(--energy-gold) 0%, var(--energy-gold-dark) 100%);
      border: none;
      color: white;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: 40px;
      box-shadow: 0 0 18px rgba(240, 155, 74, 0.45);
      transition: all 0.3s ease;
      letter-spacing: 0.5px;
    }

    .btn-primary-gold:hover {
      box-shadow: 0 0 30px rgba(240, 155, 74, 0.7);
      transform: translateY(-2px);
      color: white;
    }

    .btn-outline-gold {
      background: transparent;
      border: 1px solid var(--energy-gold);
      color: var(--energy-gold);
      font-weight: 500;
      padding: 12px 28px;
      border-radius: 40px;
      transition: all 0.3s ease;
    }

    .btn-outline-gold:hover {
      background: rgba(240, 155, 74, 0.15);
      border-color: var(--energy-gold-dark);
      color: white;
    }

    .section-padding {
      padding: var(--spacing-2xl) 0;
    }

    .nav-glass {
      background: rgba(10, 17, 31, 0.8);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .logo-text {
      font-size: 1.8rem;
      font-weight: 700;
      letter-spacing: 2px;
      background: linear-gradient(135deg, #E0C08B, #F09B4A);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .search-box {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 30px;
      padding: 8px 20px;
      color: white;
      width: 320px;
      transition: 0.2s;
    }

    .search-box:focus {
      border-color: var(--energy-gold);
      box-shadow: 0 0 12px rgba(240, 155, 74, 0.4);
      outline: none;
    }

    .nav-link-custom {
      color: var(--text-muted) !important;
      font-weight: 500;
      margin: 0 6px;
      transition: 0.2s;
    }

    .nav-link-custom:hover, .nav-link-custom.active {
      color: var(--energy-gold) !important;
    }

    .hero-title {
      font-size: 3.2rem;
      font-weight: 700;
      color: var(--text-light);
    }

    .feature-card-large {
      background: var(--card-bg);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(255,255,255,0.18);
      border-radius: 24px;
      padding: 2rem;
    }

    .feature-card-small {
      background: rgba(18, 40, 65, 0.65);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: 16px;
      padding: 1.5rem;
    }

    .timeline-node {
      width: 20px;
      height: 20px;
      background: var(--energy-gold);
      border-radius: 50%;
      box-shadow: 0 0 15px var(--energy-gold);
      margin-left: -10px;
    }

    .counter-number {
      font-size: 3rem;
      font-weight: 800;
      color: var(--energy-gold);
      text-shadow: 0 0 15px rgba(240,155,74,0.6);
    }

    .testimonial-card {
      background: rgba(18, 40, 65, 0.55);
      backdrop-filter: blur(12px);
      border-left: 4px solid var(--energy-gold);
      border-radius: 16px;
    }

    .accordion-button:not(.collapsed) {
      background: rgba(240, 155, 74, 0.1);
      color: var(--text-light);
      box-shadow: none;
    }

    .accordion-button {
      background: rgba(255,255,255,0.03);
      color: var(--text-muted);
      font-weight: 600;
    }

    .accordion-item {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.1);
    }

    footer a {
      color: var(--footer-text);
      text-decoration: none;
      transition: 0.2s;
    }
    footer a:hover {
      color: var(--energy-gold);
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.4rem;
      }
      .search-box {
        width: 100%;
      }
      .counter-number {
        font-size: 2.2rem;
      }
    }