.sticky-interest-btn {
        position: fixed;
        bottom: 20px;
        left: 20px;
        right: 96px;
        height: 56px;
        background: linear-gradient(135deg, #E35205 0%, #ff6b1a 100%);
        color: #fff;
        border-radius: 28px;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        font-weight: 700;
        font-size: 15px;
        box-shadow: 0 4px 20px rgba(227, 82, 5, 0.4);
        z-index: 1040;
        cursor: pointer;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        opacity: 0;
        visibility: hidden;
        transform: translateY(100px);
      }

      /* Ocultar cuando hay modal abierto */
      body.modal-open .sticky-interest-btn {
        opacity: 0 !important;
        visibility: hidden !important;
        transform: translateY(100px) !important;
      }

      .sticky-interest-btn:hover {
        transform: scale(1.02) translateY(-2px);
        box-shadow: 0 6px 25px rgba(227, 82, 5, 0.5);
      }

      @keyframes pulse-glow-sticky {
        0% {
          box-shadow: 0 4px 20px rgba(227, 82, 5, 0.4);
        }

        50% {
          box-shadow: 0 4px 30px rgba(255, 107, 26, 0.6), 0 0 15px rgba(227, 82, 5, 0.4);
        }

        100% {
          box-shadow: 0 4px 20px rgba(227, 82, 5, 0.4);
        }
      }

      .sticky-interest-btn.show {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        animation: pulse-glow-sticky 2s infinite ease-in-out;
      }

      @media (min-width: 769px) {
        .sticky-interest-btn {
          left: auto;
          right: 96px;
          width: 250px;
        }
      }