.hb-mertra-panel {
  --hb-ink: #111111;
  --hb-copy: #333333;
  --hb-muted: #666666;
  --hb-line: #dddddd;
  --hb-soft: #f5f5f5;
  --hb-white: #ffffff;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  color: var(--hb-copy);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 17px;
  line-height: 1.78;
  overflow-wrap: break-word;
}
.hb-mertra-panel,
.hb-mertra-panel * { box-sizing: border-box; }
.hb-mertra-panel p,
.hb-mertra-panel figure { margin: 0 0 23px; }
.hb-mertra-panel p + p { margin-top: 2px; }
.hb-mertra-panel h2 {
  margin: 65px 0 25px;
  padding-top: 20px;
  border-top: 2px solid var(--hb-ink);
  color: var(--hb-ink);
  font-size: clamp(26px, 3vw, 35px);
  font-weight: 750;
  line-height: 1.22;
  letter-spacing: -.025em;
  scroll-margin-top: 28px;
}
.hb-mertra-panel h3 {
  color: var(--hb-ink);
  font-size: 20px;
  line-height: 1.35;
}
.hb-mertra-panel strong { color: var(--hb-ink); }
.hb-mertra-panel a {
  color: var(--hb-ink);
  font-weight: 700;
  text-decoration-color: #777777;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.hb-mertra-panel a:hover { text-decoration-color: var(--hb-ink); }
.hb-mertra-panel .hb-panel-lede {
  margin-bottom: 29px;
  color: #252525;
  font-size: 20px;
  line-height: 1.65;
}
.hb-mertra-panel .hb-panel-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px;
  margin: 0 0 44px;
  border: 1px solid var(--hb-line);
  background: var(--hb-soft);
}
.hb-mertra-panel .hb-panel-toc a {
  flex: 1 1 130px;
  min-width: 0;
  padding: 11px 10px;
  border: 1px solid #c7c7c7;
  background: var(--hb-white);
  color: var(--hb-ink);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
  text-decoration: none;
}
.hb-mertra-panel .hb-panel-toc a:hover,
.hb-mertra-panel .hb-panel-toc a:focus-visible {
  background: var(--hb-ink);
  color: var(--hb-white);
  border-color: var(--hb-ink);
}
.hb-mertra-panel .hb-panel-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  width: 100%;
  margin: 29px 0 14px;
  color: inherit;
  text-decoration: none;
}
.hb-mertra-panel .hb-panel-pair-item {
  display: flex;
  min-width: 0;
  flex-direction: column;
  border: 1px solid var(--hb-line);
  background: var(--hb-white);
}
.hb-mertra-panel .hb-panel-pair-item img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  background: #ededeb;
}
.hb-mertra-panel .hb-panel-image-label {
  display: block;
  padding: 14px 18px 17px;
  color: var(--hb-ink);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.45;
}
.hb-mertra-panel .hb-panel-pair:hover .hb-panel-pair-item,
.hb-mertra-panel .hb-panel-pair:focus-visible .hb-panel-pair-item { border-color: #999999; }
.hb-mertra-panel .hb-panel-caption {
  margin: 0 0 28px;
  color: var(--hb-muted);
  font-size: 14px;
  line-height: 1.6;
}
.hb-mertra-panel .hb-panel-product {
  display: block;
  margin: 32px 0 39px;
  border: 1px solid var(--hb-line);
  background: #fafafa;
  color: var(--hb-copy);
  text-decoration: none;
}
.hb-mertra-panel .hb-panel-product-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  background: var(--hb-soft);
}
.hb-mertra-panel .hb-panel-product-image {
  display: block;
  min-width: 0;
  padding: 16px 16px 0;
  background: var(--hb-soft);
}
.hb-mertra-panel .hb-panel-product-image + .hb-panel-product-image {
  border-left: 1px solid var(--hb-line);
}
.hb-mertra-panel .hb-panel-product-image img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
}
.hb-mertra-panel .hb-panel-photo-label {
  display: block;
  padding: 12px 3px 17px;
  color: #525252;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
}
.hb-mertra-panel .hb-panel-product-content {
  display: block;
  padding: 23px clamp(20px, 4vw, 34px) 28px;
}
.hb-mertra-panel .hb-panel-kicker {
  display: block;
  margin-bottom: 8px;
  color: var(--hb-muted);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.hb-mertra-panel .hb-panel-product-title {
  display: block;
  margin-bottom: 9px;
  color: var(--hb-ink);
  font-size: 23px;
  font-weight: 750;
  line-height: 1.3;
}
.hb-mertra-panel .hb-panel-product-text {
  display: block;
  margin-bottom: 20px;
  color: #444444;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.7;
}
.hb-mertra-panel .hb-panel-product-action,
.hb-mertra-panel .hb-panel-button {
  display: inline-block;
  padding: 13px 20px;
  border: 1px solid var(--hb-ink);
  background: var(--hb-ink);
  color: var(--hb-white);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
}
.hb-mertra-panel .hb-panel-product:hover .hb-panel-product-action,
.hb-mertra-panel .hb-panel-product:focus-visible .hb-panel-product-action,
.hb-mertra-panel .hb-panel-button:hover,
.hb-mertra-panel .hb-panel-button:focus-visible {
  background: var(--hb-white);
  color: var(--hb-ink);
}
.hb-mertra-panel .hb-panel-faq-item {
  margin-bottom: 12px;
  padding: 20px 23px 21px;
  border: 1px solid var(--hb-line);
  background: var(--hb-white);
}
.hb-mertra-panel .hb-panel-faq-item h3 {
  margin: 0 0 9px;
  color: var(--hb-ink);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
}
.hb-mertra-panel .hb-panel-faq-item p {
  margin: 0;
  color: var(--hb-copy);
  font-size: 16px;
  line-height: 1.7;
}
.hb-mertra-panel .hb-panel-final {
  margin: 58px 0 0;
  padding: clamp(25px, 4vw, 42px);
  border: 2px solid var(--hb-ink);
  background: var(--hb-soft);
}
.hb-mertra-panel .hb-panel-final p:last-of-type { margin-bottom: 25px; }
@media (max-width: 740px) {
  .hb-mertra-panel { font-size: 16px; line-height: 1.75; }
  .hb-mertra-panel .hb-panel-lede { font-size: 18px; }
  .hb-mertra-panel h2 { margin-top: 52px; font-size: clamp(25px, 6vw, 31px); }
  .hb-mertra-panel .hb-panel-toc a { flex-basis: calc(50% - 8px); }
  .hb-mertra-panel .hb-panel-pair { gap: 10px; }
  .hb-mertra-panel .hb-panel-image-label { padding: 12px 11px 14px; font-size: 13px; }
  .hb-mertra-panel .hb-panel-product-image { padding: 10px 10px 0; }
  .hb-mertra-panel .hb-panel-photo-label { padding: 9px 2px 13px; font-size: 12px; }
  .hb-mertra-panel .hb-panel-product-title { font-size: 21px; }
}
@media (max-width: 430px) {
  .hb-mertra-panel .hb-panel-toc a { flex-basis: 100%; }
  .hb-mertra-panel .hb-panel-pair { grid-template-columns: 1fr; }
  .hb-mertra-panel .hb-panel-product-gallery { grid-template-columns: 1fr; }
  .hb-mertra-panel .hb-panel-product-image + .hb-panel-product-image {
    border-left: 0;
    border-top: 1px solid var(--hb-line);
  }
  .hb-mertra-panel .hb-panel-product-action,
  .hb-mertra-panel .hb-panel-button { width: 100%; text-align: center; }
}