/* ===== 品牌档案专属样式 ===== */
.page-about {
  --about-hero-gap: 2rem;
  --about-mission-gap: 2.5rem;
  --about-card-radius: 1rem;
  --about-transition-speed: 0.35s;
}

/* 首屏杂志式封面 */
.page-about .about-hero {
  background-color: var(--clr-primary-bg, #F5F0E8);
  padding: 6rem 1.25rem 4rem;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero__inner {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  align-items: center;
}

.page-about .about-hero__text {
  position: relative;
  order: 1;
  text-align: center;
}

.page-about .about-hero__label {
  display: inline-block;
  font-family: var(--ff-heading, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: var(--fs-small, 0.875rem);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  border-bottom: 2px solid var(--clr-gold, #C9A94E);
  padding-bottom: 0.25rem;
}

.page-about .about-hero__title {
  font-family: var(--ff-heading, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 3.2rem;
  font-weight: 900;
  line-height: var(--lh-headings, 1.1);
  color: var(--clr-primary-text, #1A1A1A);
  margin: 0 0 0.25rem;
  letter-spacing: -0.02em;
  font-style: italic;
  background: linear-gradient(135deg, var(--clr-accent-red, #CC2936) 0%, var(--clr-accent-blue, #1E3A5F) 80%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-hero__note {
  display: inline-block;
  font-size: 0.75rem;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  position: absolute;
  right: -0.5rem;
  top: 0.5rem;
  color: var(--clr-accent-red, #CC2936);
  letter-spacing: 0.2em;
  font-weight: 600;
  opacity: 0.75;
}

.page-about .about-hero__desc {
  font-size: 1.05rem;
  color: var(--clr-secondary-text, #4A4A4A);
  max-width: 480px;
  margin: 1.25rem auto 0;
  line-height: var(--lh-body, 1.6);
}

.page-about .about-hero__visual {
  order: 0;
  width: 100%;
  max-width: 400px;
}

.page-about .about-hero__img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 1.5rem;
  object-fit: cover;
  aspect-ratio: 1/1;
  box-shadow: 0 1.5rem 3rem -1rem rgba(0,0,0,0.18);
  background-color: var(--clr-card-bg, #FFFFFF);
}

/* 品牌使命 */
.page-about .about-mission {
  padding: 3.5rem 1.25rem;
  background-color: var(--clr-card-bg, #FFFFFF);
}

.page-about .about-mission__inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-about .about-mission__content {
  text-align: center;
}

.page-about .about-mission__heading {
  font-family: var(--ff-heading, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: var(--fs-h3, 2rem);
  font-weight: 700;
  color: var(--clr-accent-blue, #1E3A5F);
  margin: 0 0 1.25rem;
  position: relative;
  display: inline-block;
}

.page-about .about-mission__heading::after {
  content: '';
  display: block;
  width: 60%;
  height: 3px;
  background: var(--clr-accent-red, #CC2936);
  margin: 0.5rem auto 0;
  border-radius: 2px;
}

.page-about .about-mission__statement {
  font-family: var(--ff-heading, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--clr-primary-text, #1A1A1A);
  line-height: var(--lh-headings, 1.1);
  max-width: 680px;
  margin: 0 auto 0.75rem;
  background: linear-gradient(135deg, var(--clr-accent-red, #CC2936), var(--clr-gold, #C9A94E));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-mission__detail {
  max-width: 600px;
  margin: 0 auto;
  color: var(--clr-secondary-text, #4A4A4A);
}

.page-about .about-mission__visual {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}

.page-about .about-mission__img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--about-card-radius, 1rem);
  object-fit: cover;
  aspect-ratio: 4/3;
  box-shadow: 0 0.75rem 1.5rem -0.5rem rgba(0,0,0,0.12);
  background-color: var(--clr-primary-bg, #F5F0E8);
}

/* 核心能力 */
.page-about .about-capabilities {
  padding: 3.5rem 1.25rem;
  background-color: var(--clr-primary-bg, #F5F0E8);
}

.page-about .about-capabilities__heading {
  font-family: var(--ff-heading, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: var(--fs-h3, 2rem);
  font-weight: 700;
  color: var(--clr-accent-blue, #1E3A5F);
  text-align: center;
  margin: 0 0 2rem;
  position: relative;
}

.page-about .about-capabilities__heading::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--clr-accent-red, #CC2936);
  margin: 0.5rem auto 0;
  border-radius: 2px;
}

.page-about .capabilities-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  max-width: 720px;
  margin: 0 auto;
}

.page-about .capability-item {
  background: var(--clr-card-bg, #FFFFFF);
  border-radius: var(--about-card-radius, 1rem);
  padding: 0;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: box-shadow var(--about-transition-speed, 0.35s) ease;
}

.page-about .capability-item:hover {
  box-shadow: 0 4px 16px rgba(204, 41, 54, 0.12);
}

.page-about .capability-item__btn {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding: 1rem 1.25rem;
  background: none;
  border: none;
  cursor: pointer;
  font: inherit;
  text-align: left;
  color: var(--clr-primary-text, #1A1A1A);
  transition: background-color 0.2s ease;
}

.page-about .capability-item__btn:hover {
  background-color: var(--clr-hover-tint, rgba(204, 41, 54, 0.1));
}

.page-about .capability-item__icon {
  width: 48px;
  height: 48px;
  border-radius: 0.75rem;
  object-fit: cover;
  flex-shrink: 0;
  background-color: var(--clr-primary-bg, #F5F0E8);
}

.page-about .capability-item__title {
  font-family: var(--ff-heading, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 1rem;
  font-weight: 600;
  flex: 1;
  line-height: 1.3;
}

.page-about .capability-item__arrow {
  font-size: 1.25rem;
  font-weight: 700;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.page-about .capability-item[data-expandable="true"][aria-expanded="true"] .capability-item__arrow {
  transform: rotate(90deg);
}

.page-about .capability-item__detail {
  padding: 0 1.25rem 0 5rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--about-transition-speed, 0.35s) ease, padding var(--about-transition-speed, 0.35s) ease;
}

.page-about .capability-item[aria-expanded="true"] .capability-item__detail {
  max-height: 200px;
  padding-bottom: 1rem;
  padding-top: 0.25rem;
}

.page-about .capability-item__detail p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--clr-secondary-text, #4A4A4A);
}

/* 使用场景 */
.page-about .about-scenario {
  padding: 3.5rem 1.25rem;
  background-color: var(--clr-card-bg, #FFFFFF);
}

.page-about .about-scenario__inner {
  text-align: center;
}

.page-about .about-scenario__heading {
  font-family: var(--ff-heading, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: var(--fs-h3, 2rem);
  font-weight: 700;
  color: var(--clr-accent-blue, #1E3A5F);
  margin: 0 0 1.5rem;
  position: relative;
}

.page-about .about-scenario__heading::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--clr-accent-red, #CC2936);
  margin: 0.5rem auto 0;
  border-radius: 2px;
}

.page-about .about-scenario__content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
}

.page-about .about-scenario__text {
  max-width: 680px;
  margin: 0;
  color: var(--clr-primary-text, #1A1A1A);
  line-height: var(--lh-body, 1.6);
  font-size: 1rem;
  text-align: left;
  padding: 0 0.5rem;
  transition: background-color 0.3s ease;
  border-radius: 0.5rem;
}

.page-about .about-scenario__text:hover {
  background-color: var(--clr-hover-tint, rgba(204, 41, 54, 0.08));
  padding: 0.5rem;
  margin: -0.5rem 0;
}

.page-about .about-scenario__visual {
  width: 100%;
  max-width: 800px;
}

.page-about .about-scenario__img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--about-card-radius, 1rem);
  object-fit: cover;
  aspect-ratio: 2/1;
  box-shadow: 0 0.75rem 1.5rem -0.5rem rgba(0,0,0,0.12);
  background-color: var(--clr-primary-bg, #F5F0E8);
}

/* 内部链接导航 */
.page-about .about-links {
  padding: 3rem 1.25rem 4rem;
  background-color: var(--clr-primary-bg, #F5F0E8);
  border-top: 2px solid var(--clr-divider, #D4CFC4);
}

.page-about .about-links__heading {
  font-family: var(--ff-heading, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: var(--fs-h3, 2rem);
  font-weight: 700;
  color: var(--clr-accent-blue, #1E3A5F);
  text-align: center;
  margin: 0 0 1.75rem;
}

.page-about .about-links__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  padding: 0;
  margin: 0 0 2rem;
}

.page-about .about-links__list li {
  margin: 0;
}

.page-about .about-links__list .btn-ghost {
  font-family: var(--ff-body, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 0.95rem;
  padding: 0.6rem 1.5rem;
  border: 1.5px solid var(--clr-accent-red, #CC2936);
  border-radius: 2rem;
  color: var(--clr-accent-red, #CC2936);
  background: transparent;
  transition: all 0.25s ease;
  text-decoration: none;
  display: inline-block;
}

.page-about .about-links__list .btn-ghost:hover {
  background: var(--clr-accent-red, #CC2936);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(204, 41, 54, 0.25);
}

.page-about .about-links__note {
  text-align: center;
  color: var(--clr-secondary-text, #4A4A4A);
  margin: 0;
  line-height: 1.5;
}

.page-about .about-links__note a {
  text-decoration: none;
  font-weight: 600;
}

.page-about .about-links__note a:hover {
  text-decoration: underline;
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 8rem 2rem 5rem;
  }

  .page-about .about-hero__inner {
    flex-direction: row;
    gap: 3rem;
    justify-content: space-between;
    align-items: center;
  }

  .page-about .about-hero__text {
    flex: 1;
    text-align: left;
    order: 0;
    max-width: 520px;
  }

  .page-about .about-hero__title {
    font-size: 5rem;
  }

  .page-about .about-hero__desc {
    margin: 1.25rem 0 0;
  }

  .page-about .about-hero__note {
    right: -1rem;
    top: 0;
    font-size: 0.85rem;
  }

  .page-about .about-hero__visual {
    flex: 0 0 380px;
    max-width: 380px;
    order: 1;
  }

  .page-about .about-mission {
    padding: 5rem 2rem;
  }

  .page-about .about-mission__inner {
    flex-direction: row;
    gap: 3rem;
    align-items: center;
  }

  .page-about .about-mission__content {
    flex: 1;
    text-align: left;
  }

  .page-about .about-mission__heading::after {
    margin: 0.5rem 0 0;
  }

  .page-about .about-mission__statement {
    margin: 0 0 0.75rem;
  }

  .page-about .about-mission__detail {
    margin: 0;
  }

  .page-about .about-mission__visual {
    flex: 0 0 400px;
    max-width: 400px;
  }

  .page-about .about-capabilities {
    padding: 5rem 2rem;
  }

  .page-about .capabilities-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    max-width: 900px;
  }

  .page-about .capability-item__btn {
    padding: 1.25rem 1.5rem;
  }

  .page-about .capability-item__detail {
    padding-left: 5.5rem;
  }

  .page-about .about-scenario {
    padding: 5rem 2rem;
  }

  .page-about .about-scenario__content {
    flex-direction: row;
    gap: 2.5rem;
    align-items: center;
  }

  .page-about .about-scenario__text {
    flex: 1;
    font-size: 1.05rem;
    padding: 0;
  }

  .page-about .about-scenario__text:hover {
    padding: 0.75rem;
    margin: -0.75rem 0;
  }

  .page-about .about-scenario__visual {
    flex: 0 0 55%;
    max-width: 600px;
  }

  .page-about .about-links {
    padding: 4rem 2rem 5rem;
  }

  .page-about .about-links__list {
    gap: 1rem;
  }

  .page-about .about-links__list .btn-ghost {
    font-size: 1rem;
    padding: 0.7rem 2rem;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 10rem 2rem 6rem;
  }

  .page-about .about-hero__title {
    font-size: 6rem;
  }

  .page-about .about-hero__visual {
    flex: 0 0 460px;
    max-width: 460px;
  }

  .page-about .about-mission__visual {
    flex: 0 0 480px;
    max-width: 480px;
  }

  .page-about .capabilities-grid {
    gap: 1.5rem;
  }
}