.mobile-bottom-nav {
  display: none; /* PCでは非表示 */
}

@media (max-width: 768px) {
  .mobile-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background-color: #ffffff;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 1000;
    border-top: 1px solid #e0e0e0;
  }

  .mobile-bottom-nav a {
    text-align: center;
    color: #555;
    text-decoration: none;
    font-size: 12px;
    flex: 1;
    padding: 5px 0;
  }

  .mobile-bottom-nav a i {
    font-size: 18px;
    display: block;
    margin-bottom: 2px;
  }

  .mobile-bottom-nav a:hover {
    color: #ff5e5e;
  }
}