/* Force Font Awesome icons to stay upright */
    #aoxmlink-rs-e6340-48gt4xs-features i,
    #aoxmlink-rs-e6340-48gt4xs-features .fas,
    #aoxmlink-rs-e6340-48gt4xs-features .far,
    #aoxmlink-rs-e6340-48gt4xs-features .fab,
    #aoxmlink-rs-e6340-48gt4xs-features .fa {
        font-style: normal !important;
    }

    #aoxmlink-rs-e6340-48gt4xs-features * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    #aoxmlink-rs-e6340-48gt4xs-features {
      font-family: 'Arial', sans-serif;
      font-size: 16px;
      line-height: 1.7;
      color: #334155;
      max-width: 1200px;
      margin: 0 auto;
      padding: 48px 24px;
    }
    #aoxmlink-rs-e6340-48gt4xs-features .section-title {
      font-size: 28px;
      font-weight: 700;
      color: #0f172a;
      text-align: left;
      margin-bottom: 40px;
      padding-bottom: 10px;
      border-bottom: 3px solid #2563eb;
      display: inline-block;
    }
    #aoxmlink-rs-e6340-48gt4xs-features .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    #aoxmlink-rs-e6340-48gt4xs-features .feature-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 32px 24px;
      display: flex;
      flex-direction: column;
      align-items: center;
      transition: all 0.3s ease;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }
    #aoxmlink-rs-e6340-48gt4xs-features .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 12px 28px rgba(37, 99, 235, 0.12);
      border-color: #2563eb;
    }
    #aoxmlink-rs-e6340-48gt4xs-features .feature-card h3 {
      font-size: 20px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 20px;
      text-align: center;
    }

    /* Common diagram base */
    #aoxmlink-rs-e6340-48gt4xs-features .feature-diagram {
      width: 100%;
      height: 140px;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
      border-radius: 10px;
      position: relative;
      overflow: hidden;
    }

    /* 1. High Performance Switching Matrix */
    .diag-switch {
      display: flex;
      align-items: center;
      gap: 10px;
      width: 90%;
    }
    .diag-switch .port-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
      flex: 1;
    }
    .diag-switch .port-dot {
      width: 100%;
      height: 8px;
      background: #3b82f6;
      border-radius: 2px;
    }
    .diag-switch .switch-core {
      width: 70px;
      height: 70px;
      background: #1d4ed8;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 22px;
      flex-shrink: 0;
      position: relative;
    }
    .diag-switch .switch-core::before,
    .diag-switch .switch-core::after {
      content: '';
      position: absolute;
      width: 20px;
      height: 2px;
      background: #93c5fd;
      animation: flow-right 1.5s infinite linear;
    }
    .diag-switch .switch-core::before { left: -25px; }
    .diag-switch .switch-core::after { right: -25px; animation-direction: reverse; }
    @keyframes flow-right {
      0% { opacity: 0; transform: translateX(-5px); }
      50% { opacity: 1; }
      100% { opacity: 0; transform: translateX(5px); }
    }

    /* 2. IPv4/IPv6 Dual Stack */
    .diag-dualstack {
      display: flex;
      align-items: center;
      gap: 12px;
      width: 90%;
    }
    .diag-dualstack .packet {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      font-size: 11px;
      font-weight: 600;
      color: #1e40af;
    }
    .diag-dualstack .packet-box {
      width: 42px;
      height: 32px;
      border-radius: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 10px;
      font-weight: 700;
    }
    .diag-dualstack .packet-v4 { background: #3b82f6; }
    .diag-dualstack .packet-v6 { background: #8b5cf6; }
    .diag-dualstack .dual-engine {
      width: 80px;
      height: 70px;
      background: #1d4ed8;
      border-radius: 8px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 10px;
      font-weight: 600;
      flex-shrink: 0;
      gap: 2px;
    }
    .diag-dualstack .arrow {
      color: #2563eb;
      font-size: 14px;
    }

    /* 3. VSU Virtualization */
    .diag-vsu {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
      width: 80%;
    }
    .diag-vsu .virtual-unit {
      width: 120px;
      height: 36px;
      background: #1d4ed8;
      border-radius: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 12px;
      font-weight: 700;
      box-shadow: 0 0 12px rgba(37, 99, 235, 0.5);
    }
    .diag-vsu .merge-arrow {
      color: #2563eb;
      font-size: 14px;
    }
    .diag-vsu .phy-devices {
      display: flex;
      gap: 20px;
      position: relative;
    }
    .diag-vsu .phy-device {
      width: 50px;
      height: 45px;
      background: #3b82f6;
      border-radius: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 16px;
    }
    .diag-vsu .stack-link {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 30px;
      height: 3px;
      background: #60a5fa;
      animation: pulse-link 2s infinite;
    }
    @keyframes pulse-link {
      0%, 100% { opacity: 0.4; }
      50% { opacity: 1; }
    }

    /* 4. Multi-Layer Security */
    .diag-security {
      display: flex;
      align-items: center;
      gap: 8px;
      width: 90%;
    }
    .diag-security .traffic-in {
      display: flex;
      flex-direction: column;
      gap: 4px;
      flex: 1;
    }
    .diag-security .traffic-item {
      height: 6px;
      border-radius: 3px;
    }
    .diag-security .traffic-normal { background: #22c55e; }
    .diag-security .traffic-attack { background: #ef4444; }
    .diag-security .security-layers {
      display: flex;
      flex-direction: column;
      gap: 6px;
      flex-shrink: 0;
    }
    .diag-security .sec-layer {
      width: 50px;
      height: 3px;
      background: #2563eb;
      border-radius: 2px;
    }
    .diag-security .shield-icon {
      color: #1d4ed8;
      font-size: 32px;
      flex-shrink: 0;
    }
    .diag-security .blocked {
      text-decoration: line-through;
      opacity: 0.3;
    }

    /* 5. High Reliability Redundancy */
    .diag-reliability {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
      width: 85%;
    }
    .diag-reliability .endpoints {
      display: flex;
      justify-content: space-between;
      width: 100%;
    }
    .diag-reliability .endpoint {
      width: 36px;
      height: 36px;
      background: #1d4ed8;
      border-radius: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 14px;
    }
    .diag-reliability .paths {
      position: relative;
      width: 70%;
      height: 40px;
    }
    .diag-reliability .path {
      position: absolute;
      left: 0;
      right: 0;
      height: 3px;
      border-radius: 2px;
    }
    .diag-reliability .path-primary {
      top: 8px;
      background: #22c55e;
      animation: path-flow 2s infinite linear;
    }
    .diag-reliability .path-backup {
      bottom: 8px;
      background: #94a3b8;
    }
    .diag-reliability .path-label {
      position: absolute;
      right: 0;
      font-size: 10px;
      color: #64748b;
    }
    .diag-reliability .path-label.primary { top: 0; color: #16a34a; }
    .diag-reliability .path-label.backup { bottom: 0; }
    .diag-reliability .switch-tag {
      font-size: 10px;
      color: #dc2626;
      font-weight: 600;
    }
    @keyframes path-flow {
      0% { background-position: 0 0; }
      100% { background-position: 20px 0; }
    }
    .diag-reliability .path-primary {
      background: linear-gradient(90deg, #22c55e 0%, #22c55e 60%, #86efac 60%, #86efac 100%);
      background-size: 20px 100%;
    }

    /* 6. QoS Priority Queues */
    .diag-qos {
      display: flex;
      align-items: center;
      gap: 12px;
      width: 90%;
    }
    .diag-qos .traffic-types {
      display: flex;
      flex-direction: column;
      gap: 6px;
      flex: 1;
    }
    .diag-qos .traffic-type {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 10px;
      color: #334155;
    }
    .diag-qos .traffic-type i {
      color: #2563eb;
      width: 14px;
      text-align: center;
    }
    .diag-qos .queues {
      display: flex;
      flex-direction: column;
      gap: 5px;
      flex: 1;
    }
    .diag-qos .queue {
      height: 10px;
      border-radius: 3px;
      background: #e2e8f0;
      overflow: hidden;
    }
    .diag-qos .queue-fill {
      height: 100%;
      background: linear-gradient(90deg, #3b82f6, #1d4ed8);
    }
    .diag-qos .queue:nth-child(1) .queue-fill { width: 95%; }
    .diag-qos .queue:nth-child(2) .queue-fill { width: 75%; }
    .diag-qos .queue:nth-child(3) .queue-fill { width: 55%; }
    .diag-qos .queue:nth-child(4) .queue-fill { width: 35%; }

    /* 7. SDN & Telemetry */
    .diag-sdn {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
      width: 80%;
    }
    .diag-sdn .controller {
      width: 100px;
      height: 36px;
      background: #1d4ed8;
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 12px;
      font-weight: 700;
    }
    .diag-sdn .control-links {
      display: flex;
      justify-content: space-around;
      width: 100%;
      position: relative;
    }
    .diag-sdn .control-link {
      width: 2px;
      height: 30px;
      background: #60a5fa;
      position: relative;
    }
    .diag-sdn .control-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 6px;
      height: 6px;
      background: #3b82f6;
      border-radius: 50%;
      animation: blink 1.5s infinite;
    }
    @keyframes blink {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.3; }
    }
    .diag-sdn .devices {
      display: flex;
      justify-content: space-around;
      width: 100%;
    }
    .diag-sdn .sw-icon {
      font-size: 18px;
      color: #3b82f6;
    }

    /* 8. Green Energy Saving */
    .diag-green {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 18px;
      width: 85%;
    }
    .diag-green .eco-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      text-align: center;
    }
    .diag-green .eco-icon {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #dcfce7;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #16a34a;
      font-size: 20px;
    }
    .diag-green .eco-label {
      font-size: 11px;
      color: #166534;
      font-weight: 600;
    }
    .diag-green .eco-arrow {
      color: #22c55e;
      font-size: 16px;
    }

    #aoxmlink-rs-e6340-48gt4xs-features .feature-card ul {
      width: 100%;
      padding-left: 22px;
      text-align: left;
    }
    #aoxmlink-rs-e6340-48gt4xs-features .feature-card li {
      margin-bottom: 8px;
      color: #475569;
    }

    /* Responsive */
    @media (max-width: 992px) {
      #aoxmlink-rs-e6340-48gt4xs-features .features-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 576px) {
      #aoxmlink-rs-e6340-48gt4xs-features .features-grid {
        grid-template-columns: 1fr;
      }
      #aoxmlink-rs-e6340-48gt4xs-features .section-title {
        font-size: 22px;
      }
    }