.about-page {
  background: var(--page, #fbfaf7);
  color: var(--ink, #0f172a);
}

.about-hero-inner,
.about-header-inner,
.about-footer-inner {
  width: calc(100% - 64px);
  max-width: 1280px;
  margin: 0 auto;
}

.about-hero-inner {
  min-height: 620px;
  display: grid;
  grid-template-columns: minmax(0, 690px) minmax(480px, 1fr);
  align-items: center;
  gap: 48px;
  padding: 74px 0 66px;
}

.about-hero-copy,
.about-section-copy {
  min-width: 0;
}

.about-hero h1 {
  max-width: 690px;
  margin: 15px 0 22px;
  font-size: clamp(2.75rem, 3.5vw, 3.25rem);
  line-height: 1.13;
  letter-spacing: 0;
}

.about-title-line {
  display: block;
}

html[lang="zh-Hant"] .about-title-line {
  white-space: nowrap;
}

.about-report-stage {
  position: relative;
  min-height: 455px;
}

.about-report-image {
  position: absolute;
  overflow: hidden;
  margin: 0;
  border: 1px solid #cdd3da;
  background: #fff;
  box-shadow: 0 22px 54px rgba(15, 23, 42, 0.17);
}

.about-report-image:first-child {
  inset: 0 auto auto 0;
  width: 76%;
  height: 420px;
}

.about-report-image:last-child {
  right: 0;
  bottom: 0;
  width: 31%;
  height: 330px;
}

.about-report-image img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: top center;
}

.about-chapter-nav-inner {
  width: calc(100% - 64px);
  max-width: 1180px;
  min-height: 78px;
  display: grid;
  grid-template-columns: repeat(5, auto);
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 auto;
}

.about-section {
  width: calc(100% - 64px);
  max-width: 1080px;
  display: grid;
  grid-template-columns: 190px minmax(0, 760px);
  gap: 54px;
  margin: 0 auto;
  padding: 82px 0;
  scroll-margin-top: 96px;
}

.about-section-copy {
  border-top: 2px solid #0f172a;
  padding-top: 25px;
}

.about-content-list {
  display: grid;
  gap: 0;
  margin: 30px 0 0;
}

.about-content-list > div {
  display: grid;
  gap: 7px;
  padding: 17px 0;
  border-top: 1px solid #d9dde3;
}

.about-content-list dt {
  font-size: 0.84rem;
  font-weight: 700;
}

.about-content-list dd {
  margin: 0;
  font-weight: 700;
  line-height: 1.68;
  text-align: left;
}

.about-process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-block: 1px solid #d9dde3;
}

.about-process-step {
  min-height: 142px;
  padding: 22px 18px;
  border-right: 1px solid #d9dde3;
}

.about-boundary {
  margin-top: 34px;
  padding: 28px 30px;
  border-left: 4px solid #ff4f55;
  background: #fff4f3;
}

.about-faq-row {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  gap: 36px;
  padding: 24px 0;
  border-top: 1px solid #d9dde3;
}

.about-contact-band {
  border-top: 1px solid #d0e1da;
  background: #e5f3ee;
}

.about-page a:focus-visible,
.about-page button:focus-visible,
.about-page select:focus-visible {
  outline: 3px solid rgba(255, 79, 85, 0.35);
  outline-offset: 3px;
}

@media (max-width: 980px) {
  .about-hero-inner,
  .about-section {
    grid-template-columns: 1fr;
  }

  html[lang="zh-Hant"] .about-title-line {
    white-space: normal;
  }

  .about-chapter-nav-inner {
    overflow-x: auto;
    justify-content: start;
  }

  .about-process {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 620px) {
  html[lang="zh-Hant"] .about-hero h1 {
    font-size: 1.7rem;
    line-height: 1.2;
  }

  html[lang="zh-Hant"] .about-title-line {
    white-space: nowrap;
  }

  .about-hero-inner,
  .about-header-inner,
  .about-footer-inner,
  .about-chapter-nav-inner,
  .about-section {
    width: calc(100% - 36px);
  }

  .about-chapter-nav-inner {
    min-height: 0;
    grid-template-columns: 1fr;
    gap: 0;
    overflow: visible;
    padding: 12px 0;
    counter-reset: about-chapter;
  }

  .about-chapter-nav-inner a {
    min-height: 44px;
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    border-top: 1px solid #d9dde3;
    white-space: normal;
    text-align: left;
    counter-increment: about-chapter;
  }

  .about-chapter-nav-inner a:last-child {
    border-bottom: 1px solid #d9dde3;
  }

  .about-chapter-nav-inner a::before {
    color: #ff4f55;
    font-size: 0.78rem;
    font-weight: 800;
    content: "0" counter(about-chapter);
  }

  .about-faq-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .about-process {
    grid-template-columns: 1fr;
  }

  .about-process-step {
    border-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html:focus-within {
    scroll-behavior: auto;
  }
}