/* roulang page: index */
:root {
      --primary: #00E676;
      --primary-dark: #00b359;
      --primary-glow: rgba(0, 230, 118, 0.25);
      --accent: #FF6D00;
      --bg-dark: #0B1120;
      --bg-card-dark: #131E32;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --text-light: #E2E8F0;
      --border-color: #E2E8F0;
      --border-dark: #1E293B;
      --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.08);
      --shadow-lg: 0 16px 36px -6px rgba(0, 0, 0, 0.12);
      --shadow-dark: 0 10px 30px rgba(0, 0, 0, 0.4);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--font-sans);
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* Top Bar */
    .top-bar {
      background: #060A12;
      color: #94A3B8;
      font-size: 0.85rem;
      border-bottom: 1px solid #1A2436;
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary);
    }
    .top-bar-badge::before {
      content: "";
      width: 8px;
      height: 8px;
      background: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
    }
    .top-bar-links {
      display: flex;
      gap: 20px;
    }

    /* Header Nav */
    .site-header {
      position: sticky;
      top: 0;
      background: rgba(11, 17, 32, 0.95);
      backdrop-filter: blur(12px);
      z-index: 1000;
      border-bottom: 1px solid #1E293B;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.35rem;
      font-weight: 800;
      color: #FFFFFF;
      letter-spacing: -0.5px;
    }
    .brand-logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary), #00A859);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #0B1120;
      font-weight: 900;
      font-size: 1.1rem;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-link {
      color: #CBD5E1;
      font-size: 0.95rem;
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 24px;
      border-radius: 8px;
      font-weight: 600;
      font-size: 0.95rem;
      cursor: pointer;
      border: none;
      transition: var(--transition);
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--primary);
      color: #0B1120;
    }
    .btn-primary:hover {
      background: #00FF85;
      box-shadow: 0 4px 20px var(--primary-glow);
      transform: translateY(-1px);
    }
    .btn-secondary {
      background: rgba(255, 255, 255, 0.1);
      color: #FFFFFF;
      border: 1px solid rgba(255, 255, 255, 0.2);
    }
    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.2);
      border-color: #FFFFFF;
    }
    .btn-accent {
      background: var(--accent);
      color: #FFFFFF;
    }
    .btn-accent:hover {
      background: #E66200;
    }
    .btn-dark {
      background: #0F172A;
      color: #FFFFFF;
    }
    .btn-dark:hover {
      background: #1E293B;
    }

    /* Sections Common */
    .section-block {
      padding: 90px 0;
      position: relative;
    }
    .section-title-wrap {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px auto;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 12px;
      background: rgba(0, 230, 118, 0.1);
      color: #00A859;
      border: 1px solid rgba(0, 230, 118, 0.25);
    }
    .section-badge.dark {
      background: rgba(0, 230, 118, 0.15);
      color: var(--primary);
    }
    .section-h2 {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-h2.light {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-desc.light {
      color: #94A3B8;
    }

    /* Hero Section - 旗舰展示结构 */
    .hero-section {
      background: linear-gradient(180deg, #0B1120 0%, #131E32 100%);
      color: #FFFFFF;
      padding: 60px 0 100px 0;
      position: relative;
      overflow: hidden;
    }
    .hero-banner-wrap {
      position: relative;
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid #1E293B;
      background: #060A12;
      box-shadow: var(--shadow-dark);
    }
    .hero-bg-img {
      width: 100%;
      height: 520px;
      object-fit: cover;
      opacity: 0.45;
      mix-blend-mode: luminosity;
    }
    .hero-content-overlay {
      position: absolute;
      inset: 0;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 60px;
      background: linear-gradient(90deg, rgba(6, 10, 18, 0.95) 0%, rgba(6, 10, 18, 0.7) 60%, rgba(6, 10, 18, 0.3) 100%);
    }
    .hero-h1 {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.2;
      margin-bottom: 20px;
      color: #FFFFFF;
      letter-spacing: -1px;
    }
    .hero-h1 span {
      color: var(--primary);
    }
    .hero-p {
      font-size: 1.15rem;
      color: #CBD5E1;
      max-width: 680px;
      line-height: 1.75;
      margin-bottom: 36px;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-nav-bar {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(15, 23, 42, 0.9);
      backdrop-filter: blur(8px);
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      padding: 16px 24px;
    }
    .hero-nav-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 8px 16px;
      border-right: 1px solid rgba(255, 255, 255, 0.1);
      color: #E2E8F0;
    }
    .hero-nav-item:last-child {
      border-right: none;
    }
    .hero-nav-item strong {
      display: block;
      color: #FFFFFF;
      font-size: 0.95rem;
    }
    .hero-nav-item span {
      font-size: 0.8rem;
      color: #94A3B8;
    }

    /* Brand Story / Platform Intro */
    .story-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 50px;
      align-items: center;
    }
    .story-visual {
      position: relative;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .story-badge-float {
      position: absolute;
      bottom: 24px;
      right: 24px;
      background: rgba(11, 17, 32, 0.92);
      border: 1px solid var(--primary);
      padding: 16px 20px;
      border-radius: 12px;
      color: #FFFFFF;
    }

    /* Series Nav / Capability Matrix */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .matrix-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 32px 28px;
      transition: var(--transition);
    }
    .matrix-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary-dark);
    }
    .matrix-icon {
      width: 50px;
      height: 50px;
      background: #E8FBF0;
      color: #00A859;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 20px;
    }
    .matrix-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .matrix-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* Hot Products Grid */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .product-card {
      background: #FFFFFF;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .product-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
    }
    .product-thumb {
      height: 200px;
      position: relative;
      overflow: hidden;
    }
    .product-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .product-card:hover .product-thumb img {
      transform: scale(1.05);
    }
    .product-tag {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(11, 17, 32, 0.85);
      color: var(--primary);
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.75rem;
      font-weight: 700;
      border: 1px solid rgba(0, 230, 118, 0.4);
    }
    .product-body {
      padding: 28px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-name {
      font-size: 1.3rem;
      font-weight: 800;
      margin-bottom: 10px;
    }
    .product-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      flex: 1;
    }
    .product-meta-list {
      list-style: none;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
      margin-bottom: 20px;
    }
    .product-meta-list li {
      font-size: 0.88rem;
      color: #475569;
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 8px;
    }
    .product-meta-list li::before {
      content: "✓";
      color: #00A859;
      font-weight: 800;
    }

    /* Dark Control Center / Tech Showcase */
    .dark-showcase {
      background: var(--bg-dark);
      color: #FFFFFF;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
    }
    .console-box {
      background: var(--bg-card-dark);
      border: 1px solid #1E293B;
      border-radius: 16px;
      padding: 36px;
      position: relative;
    }
    .console-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid #1E293B;
      padding-bottom: 16px;
      margin-bottom: 24px;
    }
    .console-dots {
      display: flex;
      gap: 8px;
    }
    .console-dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
    }
    .dot-red { background: #EF4444; }
    .dot-yellow { background: #F59E0B; }
    .dot-green { background: #10B981; }
    .console-body-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .console-card {
      background: #0B1120;
      border: 1px solid #1E293B;
      border-radius: 10px;
      padding: 20px;
    }
    .console-card-val {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
      font-family: monospace;
      margin-bottom: 4px;
    }
    .console-card-lbl {
      font-size: 0.85rem;
      color: #94A3B8;
    }

    /* Workflow Pipeline */
    .pipeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .pipeline-step {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 28px 24px;
      position: relative;
    }
    .step-number {
      font-size: 2rem;
      font-weight: 900;
      color: #E2E8F0;
      line-height: 1;
      margin-bottom: 12px;
    }
    .step-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .step-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Member & Rights Area */
    .rights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .rights-card {
      background: #FFFFFF;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      padding: 36px 30px;
      display: flex;
      flex-direction: column;
    }
    .rights-card.featured {
      border: 2px solid var(--primary-dark);
      box-shadow: 0 10px 30px rgba(0, 179, 89, 0.1);
      position: relative;
    }
    .featured-badge {
      position: absolute;
      top: -14px;
      right: 24px;
      background: var(--primary-dark);
      color: #FFFFFF;
      padding: 4px 12px;
      border-radius: 12px;
      font-size: 0.75rem;
      font-weight: 700;
    }
    .rights-level {
      font-size: 1.35rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .rights-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 44px;
    }
    .rights-list {
      list-style: none;
      margin-bottom: 30px;
      flex: 1;
    }
    .rights-list li {
      padding: 8px 0;
      font-size: 0.92rem;
      color: #334155;
      display: flex;
      align-items: center;
      gap: 10px;
      border-bottom: 1px dashed #F1F5F9;
    }

    /* Performance Stats Banner */
    .stats-bar {
      background: linear-gradient(135deg, #0B1120 0%, #16243D 100%);
      color: #FFFFFF;
      padding: 50px 0;
      border-radius: 16px;
      margin: 40px auto;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      text-align: center;
      divide-x: 1px solid #1E293B;
    }
    .stats-item {
      padding: 0 20px;
    }
    .stats-number {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 6px;
      font-family: monospace;
    }
    .stats-label {
      font-size: 0.95rem;
      color: #94A3B8;
    }

    /* Embedded News Cards */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: 14px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
    }
    .news-card-img {
      height: 180px;
      overflow: hidden;
    }
    .news-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-card-img img {
      transform: scale(1.06);
    }
    .news-card-content {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 0.8rem;
      color: #94A3B8;
      margin-bottom: 8px;
    }
    .news-heading {
      font-size: 1.15rem;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .news-summary {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex: 1;
    }

    /* Security & Guarantee Bar */
    .guarantee-bar {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
    }
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    .guarantee-icon {
      font-size: 1.6rem;
      color: #00A859;
      line-height: 1;
    }
    .guarantee-name {
      font-weight: 700;
      font-size: 1rem;
      margin-bottom: 4px;
    }
    .guarantee-text {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* Testimonials Wall */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 30px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .testimonial-body {
      font-size: 0.95rem;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 24px;
      flex: 1;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }
    .user-avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #0F172A;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
    }
    .user-meta strong {
      display: block;
      font-size: 0.95rem;
      color: var(--text-main);
    }
    .user-meta span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ Accordion */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-item summary {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
      user-select: none;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary::after {
      content: "+";
      font-size: 1.4rem;
      color: #00A859;
      transition: transform 0.3s;
    }
    .faq-item[open] summary::after {
      content: "−";
      color: var(--accent);
    }
    .faq-content {
      padding: 0 24px 22px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Direct Access Entry / CTA */
    .entry-banner {
      background: linear-gradient(135deg, #0B1120 0%, #042B1A 100%);
      border: 1px solid #1E293B;
      border-radius: 20px;
      padding: 60px;
      text-align: center;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
    }
    .entry-title {
      font-size: 2.2rem;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .entry-p {
      font-size: 1.1rem;
      color: #CBD5E1;
      max-width: 660px;
      margin: 0 auto 36px auto;
    }
    .entry-form {
      display: flex;
      justify-content: center;
      gap: 12px;
      max-width: 520px;
      margin: 0 auto;
    }
    .entry-input {
      flex: 1;
      padding: 14px 20px;
      border-radius: 8px;
      border: 1px solid #334155;
      background: rgba(15, 23, 42, 0.8);
      color: #FFFFFF;
      font-size: 0.95rem;
      outline: none;
    }
    .entry-input:focus {
      border-color: var(--primary);
    }

    /* Footer */
    .site-footer {
      background: #060A12;
      color: #94A3B8;
      padding: 70px 0 30px 0;
      border-top: 1px solid #1A2436;
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand {
      color: #FFFFFF;
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .footer-desc {
      line-height: 1.7;
      color: #64748B;
      margin-bottom: 20px;
    }
    .footer-col-title {
      color: #FFFFFF;
      font-weight: 700;
      font-size: 1rem;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid #131E32;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: #475569;
      font-size: 0.82rem;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .matrix-grid, .product-grid, .news-grid, .testimonial-grid, .rights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .pipeline-grid, .guarantee-grid, .console-body-grid, .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-nav-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .story-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-menu, .top-bar {
        display: none;
      }
      .hero-h1 {
        font-size: 2.2rem;
      }
      .hero-content-overlay {
        padding: 30px 20px;
      }
      .hero-bg-img {
        height: 600px;
      }
      .hero-nav-bar {
        grid-template-columns: 1fr;
      }
      .matrix-grid, .product-grid, .news-grid, .testimonial-grid, .rights-grid,
      .pipeline-grid, .guarantee-grid, .console-body-grid, .stats-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .entry-form {
        flex-direction: column;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }