/* roulang page: index */
:root {
      --primary: #0A0E27;
      --bg-deep: #060B1A;
      --bg-section: #0D1230;
      --accent-green: #00E676;
      --accent-orange: #FF6D00;
      --text-primary: #E8EDF2;
      --text-secondary: rgba(232, 237, 242, 0.7);
      --text-muted: rgba(232, 237, 242, 0.5);
      --glass-bg: rgba(255, 255, 255, 0.03);
      --glass-border: rgba(255, 255, 255, 0.06);
      --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.05);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --radius-full: 50px;
      --font-heading: 'Inter', system-ui, sans-serif;
      --font-body: 'Noto Sans SC', 'PingFang SC', sans-serif;
      --font-mono: 'JetBrains Mono', monospace;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: var(--font-body);
      background-color: var(--bg-deep);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-heading);
    }
    .font-mono {
      font-family: var(--font-mono);
    }
    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px) saturate(180%);
      -webkit-backdrop-filter: blur(20px) saturate(180%);
      border: 1px solid var(--glass-border);
      box-shadow: var(--card-shadow);
      border-radius: var(--radius-lg);
    }
    .glass-card-sm {
      border-radius: var(--radius-md);
    }
    .btn-primary {
      background: linear-gradient(135deg, #00E676, #00C853);
      color: #060B1A;
      font-weight: 600;
      border-radius: var(--radius-full);
      padding: 0.75rem 2rem;
      box-shadow: 0 0 24px rgba(0, 230, 118, 0.5);
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
      font-family: var(--font-body);
      letter-spacing: 0.02em;
    }
    .btn-primary:hover {
      filter: brightness(1.15);
      box-shadow: 0 0 32px rgba(0, 230, 118, 0.7);
      transform: scale(1.05);
    }
    .btn-primary:active {
      transform: scale(0.98);
      filter: brightness(0.95);
    }
    .btn-ghost {
      background: transparent;
      border: 1px solid rgba(0, 230, 118, 0.5);
      color: var(--accent-green);
      font-weight: 600;
      border-radius: var(--radius-full);
      padding: 0.75rem 2rem;
      transition: all 0.3s ease;
      cursor: pointer;
      font-family: var(--font-body);
      letter-spacing: 0.02em;
    }
    .btn-ghost:hover {
      background: rgba(0, 230, 118, 0.1);
      border-color: rgba(0, 230, 118, 0.8);
      box-shadow: 0 0 16px rgba(0, 230, 118, 0.2);
    }
    .section-padding {
      padding-top: 7.5rem;
      padding-bottom: 7.5rem;
    }
    @media (max-width: 768px) {
      .section-padding {
        padding-top: 5rem;
        padding-bottom: 5rem;
      }
    }
    .text-gradient-green {
      background: linear-gradient(135deg, #00E676, #00C853);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .decorative-line {
      width: 48px;
      height: 4px;
      background: var(--accent-green);
      border-radius: 4px;
      margin-bottom: 1.5rem;
    }
    .nav-blur {
      background: rgba(6, 11, 26, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .hero-gradient {
      background: radial-gradient(circle at 30% 50%, #0A0E27 0%, #020518 100%);
    }
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-grid-item-large {
      grid-column: span 2;
    }
    @media (max-width: 1024px) {
      .feature-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .feature-grid-item-large {
        grid-column: span 2;
      }
    }
    @media (max-width: 640px) {
      .feature-grid {
        grid-template-columns: 1fr;
      }
      .feature-grid-item-large {
        grid-column: span 1;
      }
    }
    .masonry-columns {
      column-count: 3;
      column-gap: 24px;
    }
    @media (max-width: 1024px) {
      .masonry-columns {
        column-count: 2;
      }
    }
    @media (max-width: 640px) {
      .masonry-columns {
        column-count: 1;
      }
    }
    .masonry-card {
      break-inside: avoid;
      margin-bottom: 24px;
      transition: transform 0.25s ease, border-color 0.25s ease;
    }
    .masonry-card:hover {
      transform: translateY(-8px);
      border-color: rgba(0, 230, 118, 0.3);
    }
    .pricing-highlight {
      border: 2px solid transparent;
      background-clip: padding-box;
      position: relative;
      z-index: 1;
    }
    .pricing-highlight::before {
      content: '';
      position: absolute;
      top: -2px;
      left: -2px;
      right: -2px;
      bottom: -2px;
      background: linear-gradient(180deg, #00E676, #FF6D00);
      border-radius: 18px;
      z-index: -1;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.4s ease;
    }
    .faq-answer.open {
      max-height: 400px;
      padding-top: 1rem;
    }
    .faq-icon {
      transition: transform 0.3s ease;
    }
    .faq-icon.rotate {
      transform: rotate(45deg);
    }
    .scrollbar-hide::-webkit-scrollbar {
      display: none;
    }
    .scrollbar-hide {
      -ms-overflow-style: none;
      scrollbar-width: none;
    }
    @media (max-width: 768px) {
      .mobile-menu {
        display: none;
      }
      .mobile-menu.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(6, 11, 26, 0.95);
        backdrop-filter: blur(12px);
        padding: 1.5rem;
        border-bottom: 1px solid rgba(255,255,255,0.05);
      }
    }