.article-hero {
  position: relative;
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: clamp(7.2rem, 11vw, 8.8rem) 16px clamp(2.4rem, 4vw, 3rem);
}

.article-hero::before {
  content: "";
  position: absolute;
  inset: 18px;
  border-radius: var(--border-radius-xl);
  background-color: #1a1a1a;
  z-index: 0;
}

.article-hero__bg {
  position: absolute;
  inset: 18px;
  width: calc(100% - 36px);
  height: calc(100% - 36px);
  object-fit: cover;
  object-position: center;
  border-radius: var(--border-radius-xl);
  z-index: 0;
}

.article-hero::after {
  content: "";
  position: absolute;
  inset: 18px;
  border-radius: var(--border-radius-xl);
  background: linear-gradient(180deg, rgba(10, 10, 10, 0.22) 0%, rgba(10, 10, 10, 0.62) 100%);
  z-index: 1;
}

.article-hero__container {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
}

.article-hero__content {
  display: grid;
  justify-items: center;
  gap: 1.1rem;
  max-width: 980px;
}

.article-hero__topline {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  width: fit-content;
  margin: 0 auto;
  padding: 0.6rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.08);
}

.article-hero__breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: center;
}

.article-hero__breadcrumb .breadcrumb__link,
.article-hero__breadcrumb .breadcrumb__separator {
  color: rgba(255, 255, 255, 0.72);
}

.article-hero__breadcrumb .breadcrumb__current {
  color: #ffffff;
}

.article-hero__date {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding-left: 0.85rem;
  border-left: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.8rem;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.article-hero__title {
  margin: 0;
  max-width: min(20ch, 100%);
  font-size: clamp(1.7rem, 4vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: #ffffff;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-detail {
  background: #ffffff;
  padding-top: clamp(2.5rem, 4vw, 3rem);
}

.article-detail__container {
  display: grid;
  grid-template-columns: minmax(220px, 250px) minmax(0, 1fr) minmax(260px, 300px);
  gap: clamp(1rem, 2.2vw, 1.8rem);
  align-items: start;
}

.article-sidebar,
.inquiry-sidebar {
  position: sticky;
  top: calc(72px + var(--space-8));
}

.article-toc,
.article-inquiry-card {
  border-radius: 24px;
  background: linear-gradient(180deg, #ffffff 0%, #faf8f5 100%);
  border: 1px solid rgba(17, 17, 17, 0.08);
  box-shadow: 0 18px 40px rgba(13, 13, 13, 0.05);
}

.article-toc {
  overflow: hidden;
}

.toc-title {
  width: 100%;
  min-height: 58px;
  padding: 1rem 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: #111111;
  font-size: 0.95rem;
  font-weight: var(--fw-semibold);
  border-bottom: 1px solid rgba(17, 17, 17, 0.08);
}

.toc-title__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  font-size: 1rem;
  line-height: 1;
}

.toc-title.collapsed .toc-title__icon {
  transform: rotate(45deg);
}

.toc-nav {
  padding: 0.75rem;
}

.toc-nav.collapsed {
  display: none;
}

.toc-list {
  display: grid;
  gap: 0.2rem;
}

.toc-item {
  list-style: none;
}

.toc-item-sub {
  padding-left: 0.75rem;
}

.toc-link {
  display: block;
  padding: 0.72rem 0.8rem;
  border-radius: 14px;
  color: rgba(17, 17, 17, 0.7);
  font-size: 0.9rem;
  line-height: 1.45;
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.toc-link:hover,
.toc-link.active {
  background: #f6f2ee;
  color: #111111;
  transform: translateX(2px);
}

.article-content {
  min-width: 0;
  padding: clamp(1.4rem, 2.2vw, 2rem);
  border-radius: 28px;
  background: #ffffff;
  border: 1px solid rgba(17, 17, 17, 0.08);
  box-shadow: 0 20px 44px rgba(13, 13, 13, 0.04);
}

.article-content--wide {
  max-width: 920px;
  margin: 0 auto;
}

.article-content__title {
  margin: 0 0 1rem 0 !important;
  font-size: clamp(1.8rem, 2.8vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: #111111;
}

.article-intro {
  margin: 0 0 1.6rem;
  font-size: clamp(1.08rem, 1.3vw, 1.2rem);
  line-height: 1.82;
  color: rgba(17, 17, 17, 0.72);
}

.article-content h2,
.article-content h3 {
  scroll-margin-top: 120px;
}

.article-content h2 {
  margin: 2.4rem 0 0.9rem;
  font-size: clamp(1.7rem, 2.5vw, 2.2rem);
  line-height: 1.15;
  color: #111111;
}

.article-content h3 {
  margin: 1.7rem 0 0.7rem;
  font-size: clamp(1.18rem, 1.7vw, 1.4rem);
  line-height: 1.25;
  color: #222222;
}

.article-content p,
.article-content li {
  color: rgba(17, 17, 17, 0.7);
  font-size: 1rem;
  line-height: 1.84;
}

.article-content p + p {
  margin-top: 1rem;
}

.article-content ul {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
  list-style: disc;
}

.article-content li + li {
  margin-top: 0.5rem;
}

.article-content blockquote {
  margin: 1.3rem 0;
  padding: 1rem 1.2rem;
  border-left: 4px solid var(--color-primary);
  background: #faf6f2;
  border-radius: 0 18px 18px 0;
  color: #303030;
}

.article-figure {
  margin: 1.6rem 0;
  display: grid;
  gap: 0.8rem;
}

.article-figure img {
  width: 100%;
  border-radius: 24px;
}

.article-figure figcaption {
  color: rgba(17, 17, 17, 0.52);
  font-size: 0.9rem;
  line-height: 1.6;
}

.article-inquiry-card {
  padding: 1.25rem;
  display: grid;
  gap: 0.85rem;
}

.article-inquiry-card__head {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 0.1rem;
}

.article-inquiry-card__kicker {
  margin: 0;
  color: var(--color-primary);
  font-size: 0.82rem;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-inquiry-card__title {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1.15;
  color: #111111;
}

.article-inquiry-card__text {
  margin: 0;
  color: rgba(17, 17, 17, 0.63);
  font-size: 0.95rem;
  line-height: 1.72;
}

.article-inquiry-form {
  display: grid;
  gap: 0.8rem;
}

.article-inquiry-form__field {
  display: grid;
  gap: 0.38rem;
}

.article-inquiry-form__field label {
  color: #515151;
  font-size: 0.82rem;
  font-weight: var(--fw-semibold);
}

.article-inquiry-form__field input,
.article-inquiry-form__field textarea {
  width: 100%;
  border: 1px solid #d9ddd7;
  border-radius: 12px;
  padding: 0.88rem 0.95rem;
  background: #ffffff;
  color: #111111;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.article-inquiry-form__field textarea {
  min-height: 128px;
  resize: vertical;
}

.article-inquiry-form__field input:focus,
.article-inquiry-form__field textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(221, 55, 57, 0.12);
}

.article-inquiry-form__submit {
  width: 100%;
  min-height: 52px;
  margin-top: 0.2rem;
}

@media (max-width: 1280px) {
  .article-detail__container {
    grid-template-columns: minmax(220px, 250px) minmax(0, 1fr);
  }

  .inquiry-sidebar {
    grid-column: 2;
    position: static;
  }
}

@media (max-width: 1180px) {
  .article-hero__container,
  .article-detail__container {
    grid-template-columns: 1fr;
  }

  .article-sidebar,
  .inquiry-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .article-hero {
    padding-top: 7.2rem;
  }

  .article-hero::before {
    inset: 10px;
    border-radius: var(--border-radius-xl);
  }

  .article-hero__bg {
    inset: 10px;
    width: calc(100% - 20px);
    height: calc(100% - 20px);
    border-radius: var(--border-radius-xl);
  }

  .article-hero::after {
    inset: 10px;
    border-radius: var(--border-radius-xl);
  }

  .article-hero__title {
    max-width: 100%;
    font-size: clamp(1.75rem, 8.8vw, 2.6rem);
  }

  .article-content,
  .article-toc,
  .article-inquiry-card {
    border-radius: 22px;
  }

  .article-hero__topline {
    gap: 0.55rem;
    padding: 0.55rem 0.85rem;
  }

  .article-hero__date {
    padding-left: 0.65rem;
  }

  .article-content {
    padding: 1.2rem;
  }
}