/* roulang page: index */
:root {
      --deep-space: #0A0E27;
      --tech-blue: #1A5FFF;
      --electric-cyan: #00E5FF;
      --warm-gold: #FFB74D;
      --glass-bg: rgba(255, 255, 255, 0.03);
      --glass-border: rgba(255, 255, 255, 0.08);
      --glass-glow: rgba(26, 95, 255, 0.15);
      --text-primary: #FFFFFF;
      --text-body: #B0C4DE;
      --text-muted: #7B8DB3;
      --radius-card: 16px;
      --radius-inner: 12px;
      --radius-btn: 8px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-glow: 0 0 24px rgba(26, 95, 255, 0.6);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
      --font-mono: 'Inter', 'SF Pro Display', system-ui;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--deep-space);
      color: var(--text-body);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      font-weight: 400;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-sans);
      color: var(--text-primary);
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255,255,255,0.05);
      transition: all 0.3s ease-out;
    }
    .glass-card:hover {
      background: rgba(255, 255, 255, 0.06);
      border-color: rgba(26, 95, 255, 0.4);
      box-shadow: 0 12px 40px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.08);
      transform: translateY(-4px);
    }
    .btn-primary {
      background-color: var(--tech-blue);
      color: white;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-weight: 600;
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
      text-decoration: none;
    }
    .btn-primary:hover {
      background-color: #3A7AFF;
      box-shadow: var(--shadow-glow);
      transform: scale(1.02);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.2);
      color: white;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-weight: 600;
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      text-decoration: none;
    }
    .btn-outline:hover {
      border-color: var(--electric-cyan);
      color: var(--electric-cyan);
    }
    .btn-glow {
      background-color: var(--warm-gold);
      color: #0A0E27;
      font-weight: 700;
      border-radius: var(--radius-btn);
      padding: 16px 40px;
      transition: all 0.3s;
      box-shadow: 0 4px 20px rgba(255,183,77,0.3);
      display: inline-block;
      text-decoration: none;
    }
    .btn-glow:hover {
      box-shadow: 0 0 32px rgba(255,183,77,0.8);
      transform: scale(1.03);
    }
    .section-title {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-bottom: 2.5rem;
    }
    .section-title h2 {
      font-size: clamp(1.8rem, 3.5vw, 2.5rem);
      font-weight: 600;
      letter-spacing: -0.01em;
      white-space: nowrap;
    }
    .title-decor {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      color: var(--electric-cyan);
      font-size: 0.875rem;
      font-weight: 500;
      letter-spacing: 0.1em;
      text-transform: uppercase;
    }
    .title-decor::before {
      content: '';
      width: 2rem;
      height: 1px;
      background: var(--electric-cyan);
      opacity: 0.5;
    }
    .nav-blur {
      background: rgba(10, 14, 39, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .pulse-badge {
      background: rgba(0,229,255,0.15);
      color: var(--electric-cyan);
      border-radius: 20px;
      padding: 0.2rem 1rem;
      font-size: 0.75rem;
      font-weight: 600;
      animation: softPulse 2s infinite;
    }
    @keyframes softPulse {
      0% { opacity: 0.9; box-shadow: 0 0 0 0 rgba(0,229,255,0.3); }
      70% { opacity: 1; box-shadow: 0 0 0 6px rgba(0,229,255,0); }
      100% { opacity: 0.9; box-shadow: 0 0 0 0 rgba(0,229,255,0); }
    }
    .hero-visual {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: 24px;
      position: relative;
      overflow: hidden;
    }
    .masonry-grid {
      columns: 3;
      column-gap: 20px;
    }
    @media (max-width: 1024px) {
      .masonry-grid {
        columns: 2;
      }
    }
    @media (max-width: 768px) {
      .masonry-grid {
        columns: 1;
      }
      .container {
        padding-left: 1rem;
        padding-right: 1rem;
      }
      .glass-card {
        border-radius: 12px;
      }
      .btn-primary, .btn-outline {
        width: 100%;
        justify-content: center;
      }
      .section-title {
        flex-wrap: wrap;
      }
    }
    .comparison-scroll {
      scroll-snap-type: x mandatory;
      -webkit-overflow-scrolling: touch;
      display: flex;
      gap: 1.5rem;
      overflow-x: auto;
      padding-bottom: 1rem;
    }
    .comparison-scroll > * {
      scroll-snap-align: center;
      flex: 0 0 300px;
    }
    @media (min-width: 769px) {
      .comparison-scroll {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        overflow: visible;
      }
      .comparison-scroll > * {
        flex:auto;
      }
      .middle-highlight {
        transform: scale(1.03);
        border: 1px solid var(--tech-blue);
        box-shadow: 0 0 28px rgba(26,95,255,0.35);
        position: relative;
        z-index: 2;
      }
    }
    .faq-active {
      border-color: rgba(0,229,255,0.5);
      background: rgba(255,255,255,0.05);
    }
    .trust-badge {
      background: rgba(255,255,255,0.04);
      border-radius: 40px;
      padding: 0.5rem 1.25rem;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.9rem;
      color: #B0C4DE;
    }
    footer a {
      color: #7B8DB3;
      transition: color 0.2s;
    }
    footer a:hover {
      color: var(--electric-cyan);
    }