body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background: #fff;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
h1, h2, h3 {
  margin: 1rem 0 0.5rem;
}
h1 {
  font-size: clamp(1.6rem, 2vw, 4rem);
  width: 95%;
  border-bottom: 4px solid #e11;
  text-align: center;
  margin: 20px auto;
}
h2 {
  font-size: clamp(1.6rem, 2vw, 4rem);
  text-align: center;
  border-bottom: 2px solid #e11;
  display: inline-block;
}
h3 {
  font-size: 1.2rem;
}
section {
  max-width: 1200px;
  justify-items: center;
  text-align: center;
  margin: auto;
}
.link {
  color: #0073cc;
  text-decoration: underline;
}
.notice {
  color: #ff0000;
}
.center {
  text-align: center;
  justify-items: center;
}
.bn-content {
  display: inline-block;
  padding: 20px 0;
}
.bn-content .left,
.bn-content .right {
  width: 100%;
}
.bn-content .left {
  margin-bottom: 20px;
}
.bn-content .left img {
  margin: auto;
}
.grid {
  display: grid;
  gap: 1rem;
}
.ex-wrap, .add-wrap {
  display: flex;
  flex-wrap: wrap;
  width: 100%;
  justify-content: center;
  align-items: center;
  padding: 20px 0 40px;
  margin: 20px auto;
  text-align: center;
}
.ex-wrap {
  background-color: #d5e3e6;
}
.add-wrap {
  background-color: #ecfbfe;
}
.add-wrap ol {
  text-align: left;
}
.ex-wrap .item {
  color: #000;
  width: calc(45% - 10px);
  justify-items: center;
  margin: 0 5px;
}
.ex-wrap .item span {
  font-size: 16px;
  font-weight: 400;
  text-decoration: underline;
}
.step-wrap img {
  width: 90%;
  margin: auto;
}
.table { 
  width: 95%; 
  border-collapse: collapse; 
  margin: 1em auto; 
}
.table th, 
.table td { 
  border: 1px solid #ccc; padding: 0.5em; text-align: center; }
.table td:first-child {
  width: 30%;
}
.table img {
  max-width: 100px;
  margin: auto;
}
.table b {
  font-size: 1.1rem;
}
.accordion { 
  margin: 2em auto; 
  padding: 2em; 
  background-color: #ecfbfe;
}
.accordion input[type="radio"] { 
  display: none; 
}
.accordion .box { 
  border: 1px solid #ccc; 
  margin: 0.5em 0; 
  border-radius: 6px; 
  overflow: hidden; 
}
.accordion .box-title h3 { 
  display: block;
  padding: 0.75em 1em;
  margin: 0;
  background: #00b3ee;
  cursor: pointer;
  font-size: 1.25rem;
  font-weight: bold;
  color: #fff;
}
.accordion .box-content { 
  display: none; 
  padding: 1em; background: #fff; }
.accordion input:checked + .box .box-content { 
  display: block; 
}
.accordion .btn-wrapper { 
  text-align: center; margin-top: 2em; 
}
.accordion .custom-btn {
  display: inline-block; 
  background: #d00; color: #fff; padding: 0.75em 1.5em;
  border-radius: 4px; text-decoration: none;
}
@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .bn-content {
    display: flex;
    align-items: center;
    padding: 0;
  }
  .bn-content .left,
  .bn-content .right {
    width: 50%;
  }
  .bn-content .left {
    margin-bottom: unset;
  }
  .ex-wrap, .step-wrap {
    display: flex;
  }
  .ex-wrap .item {
    width: 20%;
  }
  .ex-wrap .item:hover {
    transform: translateY(5px);
  }
  .ex-wrap .item h3,
  .ex-wrap .item img {
    width: 90%;
  }
  .table img {
    max-width: 150px;
  }
}