.page-header {
      padding: 150px 0 60px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .page-header-bg {
      position: absolute;
      top: 0; right: 0; bottom: 0; left: 0;
      z-index: 0;
    }

    .page-header-bg::before {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 600px;
      height: 300px;
      background: radial-gradient(ellipse, rgba(0, 240, 255, 0.12) 0%, transparent 70%);
      filter: blur(40px);
    }

    .page-header-lines {
      position: absolute;
      top: 0; right: 0; bottom: 0; left: 0;
      overflow: hidden;
      pointer-events: none;
    }

    .page-header-line {
      position: absolute;
      width: 1px;
      height: 100%;
      background: linear-gradient(180deg, transparent, rgba(0, 240, 255, 0.08), transparent);
    }

    .page-header-line:nth-child(1) { left: 15%; }
    .page-header-line:nth-child(2) { left: 35%; }
    .page-header-line:nth-child(3) { left: 50%; }
    .page-header-line:nth-child(4) { left: 65%; }
    .page-header-line:nth-child(5) { left: 85%; }

    .page-header-content {
      position: relative;
      z-index: 1;
    }

    .page-header-subtitle {
      display: inline-block;
      padding: 4px 16px;
      border: 1px solid var(--border-color);
      border-radius: 20px;
      font-size: 12px;
      color: var(--neon-cyan);
      letter-spacing: 3px;
      text-transform: uppercase;
      margin-bottom: 16px;
    }

    .page-header-title {
      font-size: 36px;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: 2px;
      background: var(--gradient-1);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 12px;
    }

    .page-header-desc {
      font-size: 15px;
      color: var(--text-secondary);
    }

    .port-check-main {
      padding: 40px 0 80px;
    }

    .port-check-card {
      padding: 30px;
      margin-bottom: 24px;
    }

    .form-row {
      display: flex;
      gap: 16px;
      margin-bottom: 20px;
    }

    .form-group {
      flex: 1;
    }

    .form-group-btn {
      flex: 0 0 auto;
    }

    .form-label {
      display: block;
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: 8px;
      font-weight: 500;
    }

    .form-input {
      width: 100%;
      padding: 12px 16px;
      background: var(--bg-tertiary);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      color: var(--text-primary);
      font-size: 14px;
      outline: none;
      transition: all 0.3s ease;
      box-sizing: border-box;
    }

    .form-input:focus {
      border-color: var(--neon-cyan);
      box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.1);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 24px;
      border: none;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s ease;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--neon-cyan), var(--blue-primary));
      color: #ffffff;
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(0, 240, 255, 0.3);
    }

    .btn-primary:disabled {
      opacity: 0.6;
      cursor: not-allowed;
      transform: none;
    }

    .btn-ghost {
      background: transparent;
      color: var(--text-secondary);
      border: 1px solid var(--border-color);
    }

    .btn-ghost:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
    }

    .btn-sm {
      padding: 6px 14px;
      font-size: 12px;
    }

    .loading {
      display: inline-block;
      border: 2px solid rgba(0, 0, 0, 0.1);
      border-top-color: currentColor;
      border-radius: 50%;
      animation: spin 0.8s linear infinite;
    }

    @keyframes spin {
      to { transform: rotate(360deg); }
    }

    .port-quick {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
      padding-top: 16px;
      border-top: 1px solid var(--border-color);
    }

    .quick-label {
      font-size: 13px;
      color: var(--text-muted);
    }

    .quick-tag {
      padding: 4px 12px;
      background: var(--bg-tertiary);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      font-size: 12px;
      color: var(--text-secondary);
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .quick-tag:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      background: rgba(0, 240, 255, 0.05);
    }

    .port-result-card {
      padding: 24px;
      margin-bottom: 24px;
    }

    .result-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 20px;
    }

    .result-header h3 {
      font-size: 16px;
      color: var(--text-primary);
      margin: 0;
    }

    .result-status {
      padding: 6px 16px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
    }

    .status-open {
      background: rgba(46, 213, 115, 0.15);
      color: #2ed573;
      border: 1px solid rgba(46, 213, 115, 0.3);
    }

    .status-closed {
      background: rgba(255, 71, 87, 0.15);
      color: #ff4757;
      border: 1px solid rgba(255, 71, 87, 0.3);
    }

    .result-info {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }

    .result-item {
      background: var(--bg-tertiary);
      padding: 16px;
      border-radius: 8px;
    }

    .result-label {
      display: block;
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 6px;
    }

    .result-value {
      display: block;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-primary);
      font-family: 'Courier New', monospace;
    }

    .port-history-card {
      padding: 24px;
    }

    .history-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 16px;
    }

    .history-header h3 {
      font-size: 16px;
      color: var(--text-primary);
      margin: 0;
    }

    .history-list {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .history-empty {
      text-align: center;
      padding: 40px;
      color: var(--text-muted);
      font-size: 14px;
    }

    .history-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      background: var(--bg-tertiary);
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .history-item:hover {
      background: var(--bg-card);
      border-color: var(--neon-cyan);
    }

    .history-left {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .history-ip {
      font-weight: 600;
      color: var(--text-primary);
      font-family: 'Courier New', monospace;
    }

    .history-port {
      color: var(--neon-cyan);
      font-family: 'Courier New', monospace;
    }

    .history-badge {
      padding: 2px 8px;
      border-radius: 10px;
      font-size: 11px;
      font-weight: 600;
    }

    .badge-open {
      background: rgba(46, 213, 115, 0.15);
      color: #2ed573;
    }

    .badge-closed {
      background: rgba(255, 71, 87, 0.15);
      color: #ff4757;
    }

    .history-right {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .history-time {
      font-size: 13px;
      color: var(--text-secondary);
      font-family: 'Courier New', monospace;
    }

    .history-date {
      font-size: 12px;
      color: var(--text-muted);
    }

    @media (max-width: 768px) {
      .page-header-title {
        font-size: 28px;
      }

      .form-row {
        flex-direction: column;
      }

      .form-group-btn {
        width: 100%;
      }

      .form-group-btn .btn {
        width: 100%;
      }

      .result-info {
        grid-template-columns: 1fr;
      }

      .history-right {
        flex-direction: column;
        align-items: flex-end;
        gap: 4px;
      }
    }