/* roulang page: index */
:root {
      --primary: #D4FF00;
      --primary-glow: rgba(212, 255, 0, 0.5);
      --secondary-bg: #0A0E27;
      --card-bg: #1A1F3A;
      --accent-red: #FF4655;
      --text-light: #FFFFFF;
      --text-body: #B0B8D0;
      --text-muted: #6B7290;
      --border-dim: rgba(212, 255, 0, 0.15);
      --border-glow: rgba(212, 255, 0, 0.5);
      --radius-card: 12px;
      --radius-btn: 6px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --font-orbitron: 'Orbitron', sans-serif;
      --font-inter: 'Inter', 'Noto Sans SC', sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: var(--font-inter);
      background-color: var(--secondary-bg);
      color: var(--text-body);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }

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

    /* 导航 */
    .jbo-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 40;
      background: rgba(10, 14, 39, 0.8);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(212, 255, 0, 0.1);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .logo-icon {
      font-size: 1.8rem;
      color: var(--primary);
      filter: drop-shadow(0 0 6px var(--primary-glow));
    }

    .logo-text {
      font-family: var(--font-orbitron);
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: 1px;
      color: #FFFFFF;
      line-height: 1;
    }

    .desktop-links {
      display: flex;
      gap: 2.5rem;
      align-items: center;
    }

    .desktop-links a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-body);
      position: relative;
      padding: 4px 0;
    }

    .desktop-links a.active-link {
      color: #FFFFFF;
    }

    .desktop-links a.active-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
      border-radius: 4px;
    }

    .desktop-links a:hover {
      color: var(--primary);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
    }

    .hamburger span {
      width: 24px;
      height: 2px;
      background: #FFFFFF;
      transition: 0.2s;
    }

    .mobile-menu {
      position: fixed;
      top: 70px;
      left: 0;
      width: 100%;
      background: rgba(10, 14, 39, 0.96);
      backdrop-filter: blur(30px);
      display: none;
      flex-direction: column;
      align-items: center;
      padding: 2rem 0;
      gap: 2rem;
      border-bottom: 1px solid rgba(212, 255, 0, 0.2);
      z-index: 39;
    }

    .mobile-menu a {
      font-size: 1.4rem;
      font-weight: 500;
      color: #FFFFFF;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      width: 80%;
      text-align: center;
      padding-bottom: 0.5rem;
    }

    /* Hero */
    .hero-section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      margin-top: 0;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at center, rgba(10,14,39,0.3) 0%, #0A0E27 95%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
      margin: 0 auto;
      text-align: center;
      padding: 0 20px;
    }

    .hero-title {
      font-family: var(--font-orbitron);
      font-size: 3rem;
      font-weight: 800;
      color: #FFFFFF;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      text-shadow: 0 0 20px rgba(0,0,0,0.7);
    }

    .hero-sub {
      font-size: 1.1rem;
      color: var(--text-body);
      margin-bottom: 2.5rem;
      letter-spacing: 0.5px;
    }

    .btn-group {
      display: flex;
      gap: 1.2rem;
      justify-content: center;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--primary);
      color: #0A0E27;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      transition: 0.25s;
      border: none;
      font-size: 1rem;
      box-shadow: 0 4px 12px rgba(212,255,0,0.2);
    }

    .btn-primary:hover {
      background: #e0ff33;
      box-shadow: 0 0 18px var(--primary-glow);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid rgba(255,255,255,0.5);
      color: #FFFFFF;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: 0.25s;
      backdrop-filter: blur(4px);
    }

    .btn-outline:hover {
      background: rgba(212,255,0,0.1);
      border-color: var(--primary);
      color: var(--primary);
    }

    .scroll-hint {
      margin-top: 3rem;
      display: flex;
      flex-direction: column;
      align-items: center;
      color: var(--text-muted);
      gap: 6px;
    }

    /* 通用板块 */
    section {
      padding: 90px 0;
    }

    .section-title {
      font-family: var(--font-orbitron);
      font-size: 2rem;
      color: #FFFFFF;
      margin-bottom: 2.5rem;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .section-title::after {
      content: '';
      flex: 1;
      height: 2px;
      background: linear-gradient(to right, var(--primary), transparent);
      margin-left: 12px;
    }

    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: rgba(26, 31, 58, 0.7);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border-dim);
      border-radius: var(--radius-card);
      padding: 28px 20px;
      transition: all 0.25s;
    }

    .feature-card:hover {
      border-color: var(--primary-glow);
      box-shadow: 0 12px 28px rgba(212,255,0,0.15);
      transform: translateY(-4px);
    }

    .stat-wall {
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      background: rgba(10,14,39,0.8);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-card);
      padding: 2.5rem 1rem;
    }

    .stat-item {
      text-align: center;
    }

    .case-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .process-steps {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
    }

    .faq-item {
      background: rgba(26,31,58,0.6);
      border: 1px solid var(--border-dim);
      border-radius: 8px;
      margin-bottom: 12px;
    }

    .footer-links a {
      color: var(--text-muted);
    }

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

    @media (max-width: 768px) {
      .desktop-links { display: none; }
      .hamburger { display: flex; }
      .hero-title { font-size: 2.2rem; }
      .card-grid { grid-template-columns: 1fr; }
      .process-steps { flex-direction: column; gap: 2rem; }
      .stat-wall { gap: 2rem; }
    }