#welcome {
  position: relative;
  width: 100%;
  height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
}
#welcome::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("/faq/pc/faqBcg.png");
  filter: brightness(0.8);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
  background-color: #f0f0f0;
  z-index: -1;
}

#welcome h2 {
  font-size: 5rem;
  color: #fff;
  letter-spacing: 15px;
}

#faq {
  margin-top: 50px;
}

#faq .title h3 {
  font-size: 2.8rem;
  text-align: center;
}

#faq .accordion-item {
  margin-top: 30px;
  width: 80%;
  margin-inline: auto;
  max-width: 1400px;
}

#faq .accordion-header {
  border-radius: 230px;
}

#faq .accordion-button {
  padding-top: 30px;
  padding-bottom: 30px;
  font-size: 1.1rem;
}

@media only screen and (max-width: 1279px) {
  #welcome h2 {
    font-size: 3.5rem;
  }

  #faq .title h3 {
    font-size: 2.6rem;
  }

  #faq .accordion-item {
    width: 85%;
  }
}

@media only screen and (max-width: 767px) {
  #faq .title h3 {
    font-size: 2.1rem;
  }
  #faq .accordion-item {
    width: 90%;
  }
  #faq .accordion-button {
    font-size: 1rem;
  }
  #faq .accordion-body {
    font-size: 0.9rem;
  }
}

@media only screen and (max-width: 499px) {
  #welcome {
    height: 500px;
  }

  #welcome:before {
    background-image: url("/faq/mob/bcg.png");
    filter: brightness(0.7);
  }

  #faq .title h3 {
    font-size: 1.7rem;
  }
}