.howto-group-title {
  font-size: 1.7rem;
  font-weight: 700;
  color: #1e293b;
  margin: 3rem 0 1.2rem 0;
  padding: 0.9rem 1.3rem;
  background: #f1f5f9;
  border-left: 6px solid #3b82f6;
  border-radius: 6px;
  letter-spacing: 0.02em;
}

.howto-group-title:nth-of-type(1) {
  border-left-color: #3b82f6;
}
.howto-group-title:nth-of-type(2) {
  border-left-color: #8b5cf6;
}
.howto-group-title:nth-of-type(3) {
  border-left-color: #10b981;
}
.howto-group-title:nth-of-type(4) {
  border-left-color: #f59e0b;
}

.howto-list {
  list-style: none;
  padding: 1.4rem;
  margin: 0 0 1rem 0;
  background: #f8fafc;
  border-radius: 12px;
  box-shadow: inset 0 1px 4px rgba(0,0,0,0.04);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.2rem;
}

.howto-item {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 1.3rem 1.4rem;
  box-shadow: 0 3px 8px rgba(0,0,0,0.04);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

.howto-item:hover {
  box-shadow: 0 10px 20px rgba(0,0,0,0.08);
  transform: translateY(-3px);
  border-color: #3b82f6;
}

.howto-link {
  font-size: 1.15rem;
  font-weight: 600;
  color: #0f172a;
  text-decoration: none;
  margin-bottom: 0.6rem;
  display: inline-block;
  line-height: 1.3;
}

.howto-link:hover {
  color: #2563eb;
  text-decoration: underline;
}

.howto-desc {
  font-size: 0.95rem;
  line-height: 1.6;
  color: #475569;
  margin: 0;
  flex: 1;
}

.howto-desc a {
  color: #2563eb;
  text-decoration: none;
  font-weight: 500;
}

.howto-desc a:hover {
  text-decoration: underline;
}

.howto-desc b {
  color: #1e293b;
  font-weight: 600;
}

@media (max-width: 768px) {
  .howto-group-title {
    font-size: 1.4rem;
    margin-top: 2.2rem;
    padding: 0.7rem 1rem;
  }
  .howto-list {
    grid-template-columns: 1fr;
    padding: 1rem;
  }
}

.howto-notice {
  background: #fff7ed;
  border-left: 6px solid #f97316;
  border-radius: 8px;
  padding: 1.2rem 1.4rem;
  margin-bottom: 2rem;
  font-size: 0.95rem;
  line-height: 1.6;
  color: #7c2d12;
}
.howto-notice strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
  color: #9a3412;
}
.howto-notice a {
  color: #ea580c;
  text-decoration: underline;
  font-weight: 500;
}