.reading-progress {
  position: fixed;
  z-index: 120;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  pointer-events: none;
}

.reading-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--color-white);
  box-shadow: 0 1px 7px rgba(37, 37, 37, 0.24);
}

.article-hero {
  position: relative;
  min-height: 400px;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-radius: 0 0 var(--radius-large) var(--radius-large);
  background:
    linear-gradient(115deg, rgba(112, 158, 181, 0.96), rgba(151, 181, 196, 0.9)),
    var(--color-primary);
  color: var(--color-white);
}

.article-hero::before,
.article-hero::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.article-hero::before {
  width: 520px;
  height: 520px;
  right: -90px;
  bottom: -330px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
}

.article-hero::after {
  width: 190px;
  height: 190px;
  right: 22%;
  top: -92px;
  border: 44px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.article-hero__inner {
  position: relative;
  z-index: 1;
  padding-block: 72px;
}

.article-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 34px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.85rem;
}

.article-breadcrumb a {
  color: var(--color-white);
  font-weight: 700;
}

.article-hero h1 {
  display: -webkit-box;
  max-width: 1050px;
  margin: 0;
  overflow: hidden;
  color: var(--color-white);
  font-size: clamp(2.2rem, 3.4vw, 3.65rem);
  line-height: 1.12;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.article-hero__date {
  display: block;
  margin-top: 22px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.86rem;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 930px) minmax(280px, 340px);
  align-items: start;
  justify-content: space-between;
  gap: clamp(54px, 7vw, 100px);
  padding-block: var(--section-space);
}

.article-content {
  min-width: 0;
  color: #404040;
  font-size: 1.03rem;
  line-height: 1.85;
}

.article-content p {
  margin-bottom: 24px;
}

.article-content h2 {
  margin: 54px 0 20px;
  color: var(--color-text);
  font-size: var(--title-size-subsection);
  line-height: 1.28;
  scroll-margin-top: 30px;
}

.article-content h3 {
  margin: 36px 0 16px;
  color: var(--color-text);
  font-size: clamp(1.18rem, 1.45vw, 1.48rem);
  line-height: 1.4;
  scroll-margin-top: 30px;
}

.article-content strong {
  color: var(--color-text);
}

.article-content ol,
.article-content ul {
  margin: 0 0 28px;
  padding-left: 24px;
}

.article-content li + li {
  margin-top: 10px;
}

.article-cover {
  margin: 0 0 42px;
}

.article-cover img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.article-cover figcaption {
  margin-top: 12px;
  color: var(--color-text-soft);
  font-size: 0.8rem;
  line-height: 1.55;
}

.article-lead {
  color: var(--color-text);
  font-size: 1.18rem;
  font-weight: 600;
  line-height: 1.75;
}

.article-note {
  margin: 34px 0 44px;
  padding: 24px 28px;
  border-left: 4px solid var(--color-primary-strong);
  background: var(--color-primary-pale);
  color: var(--color-text);
}

.article-content blockquote,
.article-content .wp-block-quote {
  margin: 34px 0 44px;
  padding: 24px 28px;
  border: 0;
  border-left: 4px solid var(--color-primary-strong);
  background: var(--color-primary-pale);
  color: var(--color-text);
}

.article-content blockquote p:last-child,
.article-content .wp-block-quote p:last-child {
  margin-bottom: 0;
}

.article-image-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 38px 0 48px;
}

.article-image-pair img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--color-surface);
}

.article-image-pair > br {
  display: none;
}

.article-content .wp-block-image {
  margin: 38px 0 48px;
}

.article-content .wp-block-image img {
  display: block;
  width: 100%;
  height: auto;
}

.article-content .wp-block-gallery {
  margin: 38px 0 48px;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 32px 0 46px;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  font-size: 0.9rem;
  line-height: 1.55;
}

.article-content th,
.article-content td {
  padding: 16px 18px;
  border: 1px solid var(--color-line);
  text-align: left;
  vertical-align: top;
}

.article-content th {
  background: var(--color-primary-pale);
  color: var(--color-text);
  font-weight: 800;
}

.article-sidebar {
  position: sticky;
  top: 28px;
}

.article-toc {
  display: grid;
  padding: 28px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-white);
}

.article-toc p {
  margin: 0 0 18px;
  color: var(--color-primary-strong);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.article-toc a {
  padding: 10px 0;
  border-bottom: 1px solid #edf1f2;
  color: var(--color-text-soft);
  font-size: 0.86rem;
  font-weight: 700;
  line-height: 1.35;
}

.article-toc a:hover {
  color: var(--color-primary-strong);
}

.article-toc a[data-level="3"] {
  padding-left: 16px;
  color: #8a8a8a;
  font-size: 0.8rem;
}

.article-inquiry {
  margin-top: 28px;
  padding: 30px 28px;
  border-radius: var(--radius-medium);
  background: var(--color-primary-strong);
  color: var(--color-white);
}

.article-inquiry > p {
  margin: 0 0 12px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-inquiry h2 {
  margin: 0 0 14px;
  color: var(--color-white);
  font-size: var(--title-size-card);
  line-height: 1.35;
}

.article-inquiry span {
  display: block;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.88rem;
  line-height: 1.65;
}

.article-inquiry .button {
  width: 100%;
  margin-top: 22px;
  background: var(--color-white);
  color: var(--color-primary-strong);
}

.related-products {
  padding-block: var(--section-space-compact);
  background: var(--color-warm);
}

.related-products > .container > h2 {
  margin: 0 0 40px;
  font-size: var(--title-size-section);
}

.related-products__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 30px;
}

.related-products__controls {
  display: none;
}

.related-product {
  min-width: 0;
  text-align: center;
}

.related-product__media {
  overflow: hidden;
  background: var(--color-white);
}

.related-product img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
  transition: transform 360ms ease;
}

.related-product:hover img {
  transform: scale(1.045);
}

.related-product h3 {
  margin: 18px 8px 8px;
  font-size: var(--title-size-card);
}

.related-product span {
  color: var(--color-primary-strong);
  font-size: 0.84rem;
  font-weight: 800;
}

.related-product span b {
  display: inline-block;
  margin-left: 5px;
  transition: transform var(--transition);
}

.related-product:hover span b {
  transform: translateX(4px);
}

@media (max-width: 1050px) {
  .article-layout {
    grid-template-columns: minmax(0, 1fr) 290px;
    gap: 48px;
  }

  .related-products__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }

  .article-toc {
    display: none;
  }

  .article-inquiry {
    max-width: 620px;
  }
}

@media (max-width: 640px) {
  .article-hero {
    min-height: 350px;
  }

  .article-hero__inner {
    padding-block: 54px;
  }

  .article-hero h1 {
    font-size: clamp(1.85rem, 8.6vw, 2.7rem);
  }

  .article-content {
    font-size: 0.98rem;
  }

  .article-lead {
    font-size: 1.08rem;
  }

  .article-image-pair {
    grid-template-columns: 1fr;
  }

  .article-content th,
  .article-content td {
    min-width: 180px;
    padding: 13px;
  }

  .related-products__grid {
    display: flex;
    gap: 12px;
    transition: transform 320ms ease;
  }

  .related-products__viewport {
    overflow: hidden;
  }

  .related-product {
    flex: 0 0 calc((100% - 12px) / 2);
  }

  .related-product h3 {
    margin: 12px 4px 7px;
    font-size: 0.88rem;
    line-height: 1.3;
  }

  .related-product span {
    font-size: 0.74rem;
  }

  .related-products__controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-top: 26px;
  }

  .related-products__controls button {
    width: 42px;
    height: 42px;
    padding: 0;
    display: grid;
    place-items: center;
    border: 1px solid rgba(151, 183, 197, 0.42);
    border-radius: 50%;
    background: var(--color-white);
    color: var(--color-primary-strong);
    cursor: pointer;
  }

  .related-products__controls button:disabled {
    opacity: 0.45;
    cursor: default;
  }

  .related-products__controls .lucide {
    width: 19px;
    height: 19px;
  }

  .related-products__controls p {
    min-width: 42px;
    margin: 0;
    color: var(--color-text-soft);
    font-size: 0.78rem;
    text-align: center;
  }

  .related-products > .container > h2 {
    margin-bottom: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .related-product img,
  .related-product span b,
  .related-products__grid {
    transition: none;
  }
}