.about-page #home .section-inner {
  max-width: 920px;
  padding-top: clamp(4.75rem, 9vw, 7rem);
  padding-bottom: clamp(3.25rem, 7vw, 5.5rem);
}

.about-page #home .section-label {
  letter-spacing: .08em;
}

.about-page #home .section-title {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.18;
  text-wrap: balance;
}

.about-page #home .section-desc {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  font-size: clamp(1rem, 1.7vw, 1.1rem);
  line-height: 1.85;
  word-break: keep-all;
}

.about-page #home .hero-btns {
  margin-top: 1.75rem;
}

#guide-visual .section-inner {
  max-width: 1080px;
}

#guide-visual .article-hero-visual {
  overflow: hidden;
  border: 1px solid rgba(31, 41, 55, .08);
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 18px 45px rgba(15, 23, 42, .07);
}

#guide-visual .article-hero-full {
  display: block;
  width: 100%;
  height: auto;
}

#guide-visual figcaption {
  margin: 0;
  padding: .95rem 1.15rem 1.1rem;
  color: #64748b;
  font-size: .9rem;
  line-height: 1.65;
  text-align: center;
}

html body .guide-toc {
  position: sticky;
  top: calc(var(--study-header-height, 62px) + 10px) !important;
  z-index: 90;
  border-top: 1px solid rgba(15, 23, 42, .06);
  border-bottom: 1px solid rgba(15, 23, 42, .08);
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 20px rgba(15, 23, 42, .045);
}

.guide-toc-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding-top: .8rem;
  padding-bottom: .8rem;
  gap: .55rem;
}

.guide-toc-inner a {
  border-radius: 999px;
  padding: .55rem .85rem;
  transition: color .18s ease, background-color .18s ease, transform .18s ease, box-shadow .18s ease;
}

.guide-toc-inner a:hover {
  background: #f1f5f9;
  transform: translateY(-1px);
}

.guide-toc-inner a.is-active,
.guide-toc-inner a[aria-current="true"] {
  background: #315fa9;
  color: #fff;
  font-weight: 700;
  box-shadow: 0 5px 14px rgba(49, 95, 169, .22);
}

#quick-answer,
#five-signals,
#compare,
#two-three-hours,
#checklist {
  scroll-margin-top: calc(var(--study-toc-offset, 140px) + 10px);
}

#quick-answer .section-inner {
  max-width: 900px;
  margin-top: 1.5rem;
  border: 1px solid rgba(37, 99, 235, .13);
  border-radius: 22px;
  padding: clamp(1.7rem, 4vw, 2.5rem);
  background: linear-gradient(135deg, #f8fbff 0%, #f8fafc 100%);
}

#quick-answer .section-title {
  margin-bottom: 1.15rem;
  font-size: clamp(1.45rem, 3vw, 2rem);
  text-wrap: balance;
}

#quick-answer p {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.85;
}

#five-signals .section-inner,
#compare .section-inner,
#two-three-hours .section-inner,
#checklist .section-inner,
#bareunjari .section-inner,
.post-related .section-inner {
  max-width: 900px;
}

#five-signals .section-title,
#compare .section-title,
#two-three-hours .section-title,
#checklist .section-title,
#bareunjari .section-title,
.post-related .section-title {
  text-wrap: balance;
}

#five-signals h3 {
  position: relative;
  margin-top: 2.4rem;
  margin-bottom: .85rem;
  padding: 1.05rem 1.2rem 1.05rem 1.35rem;
  border: 1px solid rgba(15, 23, 42, .08);
  border-left: 4px solid #315fa9;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(15, 23, 42, .045);
  font-size: clamp(1.1rem, 2.2vw, 1.3rem);
  line-height: 1.5;
}

#five-signals p,
#compare p,
#two-three-hours > .section-inner > p,
#checklist p,
#bareunjari p {
  line-height: 1.9;
  word-break: keep-all;
}

#five-signals ul {
  margin: 1rem 0 1.35rem;
  padding: 1.1rem 1.2rem 1.1rem 2.5rem;
  border-radius: 14px;
  background: #f8fafc;
}

#five-signals li + li {
  margin-top: .45rem;
}

#compare {
  background: #f8fafc;
}

#compare .section-inner > p:not(:first-of-type) {
  margin: .8rem 0;
  padding: 1rem 1.15rem;
  border: 1px solid rgba(15, 23, 42, .07);
  border-radius: 14px;
  background: #fff;
}

#two-three-hours .about-principle-grid {
  margin-top: 1.7rem;
  gap: 1rem;
}

#two-three-hours .about-principle-item {
  min-height: 150px;
  border-radius: 16px;
  border-color: rgba(49, 95, 169, .12);
  background: #fff;
  box-shadow: 0 8px 22px rgba(15, 23, 42, .04);
}

#two-three-hours .about-principle-item h3 {
  margin-bottom: .45rem;
  font-size: 1.1rem;
}

#checklist ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .75rem;
  margin: 1.5rem 0;
  padding: 0;
  list-style: none;
}

#checklist li {
  padding: 1rem 1.05rem;
  border: 1px solid rgba(15, 23, 42, .08);
  border-radius: 14px;
  background: #fff;
  line-height: 1.65;
}

#bareunjari {
  background: #f6f8fb;
}

#bareunjari .section-inner {
  border-radius: 24px;
}

#bareunjari .hero-btns {
  margin-top: 1.7rem;
}

#bareunjari .btn-primary,
#bareunjari .btn-outline,
#home .btn-primary,
#home .btn-outline {
  min-height: 48px;
}

.post-related ul {
  display: grid;
  gap: .8rem;
  margin: 1.3rem 0 0;
  padding: 0;
  list-style: none;
}

.post-related li a {
  display: block;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(15, 23, 42, .08);
  border-radius: 14px;
  background: #fff;
  line-height: 1.65;
  text-decoration: none;
  transition: border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}

.post-related li a:hover {
  border-color: rgba(49, 95, 169, .28);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(15, 23, 42, .05);
}

@media (max-width: 760px) {
  .about-page #home .section-inner {
    padding-top: 3.75rem;
    padding-bottom: 2.8rem;
  }

  .about-page #home .section-title {
    font-size: clamp(2rem, 10vw, 2.65rem);
  }

  .about-page #home .section-title br {
    display: none;
  }

  .about-page #home .hero-btns,
  #bareunjari .hero-btns {
    display: grid;
    grid-template-columns: 1fr;
    width: 100%;
  }

  .about-page #home .hero-btns a,
  #bareunjari .hero-btns a {
    width: 100%;
    justify-content: center;
  }

  #guide-visual .article-hero-visual {
    border-radius: 16px;
  }

  #guide-visual figcaption {
    padding: .8rem .9rem .95rem;
    font-size: .82rem;
    text-align: left;
  }

  html body .guide-toc {
    position: sticky;
    top: calc(var(--study-header-height, 62px) + 8px) !important;
  }

  .guide-toc-inner {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-left: 1rem;
    padding-right: 1rem;
    scrollbar-width: none;
    scroll-behavior: smooth;
    scroll-snap-type: x proximity;
  }

  .guide-toc-inner::-webkit-scrollbar {
    display: none;
  }

  .guide-toc-label {
    display: none;
  }

  .guide-toc-inner a {
    flex: 0 0 auto;
    white-space: nowrap;
    background: #f8fafc;
    scroll-snap-align: center;
  }

  .guide-toc-inner a.is-active,
  .guide-toc-inner a[aria-current="true"] {
    background: #315fa9;
    color: #fff;
  }

  #quick-answer,
  #five-signals,
  #compare,
  #two-three-hours,
  #checklist {
    scroll-margin-top: calc(var(--study-toc-offset, 140px) + 8px);
  }

  #quick-answer .section-inner {
    margin-left: 1rem;
    margin-right: 1rem;
    padding: 1.45rem;
    border-radius: 18px;
  }

  #five-signals h3 {
    margin-top: 2rem;
    padding: .95rem 1rem;
    border-radius: 12px;
  }

  #five-signals p,
  #compare p,
  #two-three-hours > .section-inner > p,
  #checklist p,
  #bareunjari p {
    line-height: 1.82;
  }

  #two-three-hours .about-principle-grid,
  #checklist ul {
    grid-template-columns: 1fr;
  }

  #two-three-hours .about-principle-item {
    min-height: 0;
  }

  .post-related li a {
    padding: .95rem 1rem;
  }
}