.page-about {
  color: var(--color-cream);
}

/* ---------- 首屏分屏 ---------- */
.page-about .about-hero {
  padding: 40px 0 56px;
  gap: 32px;
}

.page-about .about-hero__content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

.page-about .breadcrumb {
  margin-bottom: 24px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: 64px;
  height: 5px;
  background: var(--color-gradient);
  border-radius: 3px;
  margin-top: 14px;
}

.page-about .about-hero__title-accent {
  background: var(--color-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-style: italic;
}

.page-about .about-hero__lead {
  font-size: 1rem;
  line-height: 1.75;
  color: #d5d2c9;
  max-width: 52ch;
  margin-bottom: 24px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 480px;
}

.page-about .about-stat {
  background: var(--color-panel);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  min-height: 76px;
  justify-content: center;
}

.page-about .about-stat__num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 900;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 4px;
  white-space: nowrap;
}

.page-about .about-stat__label {
  font-size: 0.85rem;
  color: #a9a6a0;
}

.page-about .about-hero__visual {
  position: relative;
}

.page-about .about-hero__visual::after {
  display: none;
}

.page-about .about-hero__visual-frame {
  position: relative;
  padding: 10px;
  background: var(--color-panel);
  border-radius: var(--radius);
  transform: rotate(1.5deg);
  z-index: 1;
}

.page-about .about-hero__visual-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: var(--color-gradient);
  z-index: -1;
  transform: translate(10px, 10px);
}

.page-about .about-hero__visual-frame img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---------- 我们的故事 ---------- */
.page-about .about-story__grid {
  display: grid;
  gap: 24px;
  margin-top: 32px;
}

.page-about .about-story__main {
  font-size: 1rem;
  line-height: 1.8;
}

.page-about .about-story__main p {
  color: #d5d2c9;
}

.page-about .about-story__main p + p {
  margin-top: 16px;
}

.page-about .about-story__aside {
  background: var(--color-panel);
  padding: 24px;
  border-left: 3px solid var(--color-purple);
  align-self: start;
}

.page-about .about-story__aside h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: 10px;
  color: var(--color-cream);
}

.page-about .about-story__aside p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: #c9c4b8;
}

.page-about .about-story__tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

/* ---------- 发展里程碑 ---------- */
.page-about .about-milestones {
  background: var(--color-panel-deep);
}

.page-about .about-timeline {
  position: relative;
  padding-left: 48px;
  padding-bottom: 16px;
  margin-top: 40px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-blue), var(--color-purple));
  opacity: 0.5;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 20px 0;
}

.page-about .about-timeline__marker {
  position: absolute;
  left: 0;
  top: 32px;
  width: 40px;
  height: 40px;
  background: var(--color-gradient);
  transform: rotate(45deg);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  box-shadow: 0 0 0 4px var(--color-panel-deep);
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about .about-timeline__year {
  transform: rotate(-45deg);
  color: var(--color-cream);
  font-weight: 700;
  font-size: 12px;
  white-space: nowrap;
  font-family: var(--font-display);
}

.page-about .about-timeline__card {
  background: var(--color-panel);
  border-radius: var(--radius);
  padding: 20px;
  border-left: 3px solid var(--color-blue);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.page-about .about-timeline__card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  margin-bottom: 6px;
  color: var(--color-cream);
}

.page-about .about-timeline__card p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: #c9c4b8;
  margin: 0;
}

.page-about .about-timeline__item:hover .about-timeline__card,
.page-about .about-timeline__item:focus-within .about-timeline__card {
  transform: translateX(6px);
  background: #363636;
}

.page-about .about-timeline__item:hover .about-timeline__marker,
.page-about .about-timeline__item:focus-within .about-timeline__marker,
.page-about .about-timeline__marker:focus-visible {
  box-shadow: 0 0 0 4px var(--color-panel-deep), 0 0 24px rgba(78, 57, 246, 0.6);
}

/* ---------- 团队与组织 ---------- */
.page-about .about-team__content p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: #d5d2c9;
  margin-bottom: 20px;
}

.page-about .about-team__roles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.page-about .about-role {
  background: var(--color-panel);
  border-radius: var(--radius);
  padding: 16px;
}

.page-about .about-role h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  margin-bottom: 6px;
  color: var(--color-yellow);
}

.page-about .about-role p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: #c9c4b8;
}

.page-about .about-team__visual {
  position: relative;
}

.page-about .about-team__visual-frame {
  padding: 10px;
  background: var(--color-panel);
  border-radius: var(--radius);
  transform: rotate(-1deg);
}

.page-about .about-team__visual-frame img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---------- 资质与认证 ---------- */
.page-about .about-qualification__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 32px;
}

.page-about .about-cert {
  background: var(--color-panel);
  padding: 28px 24px;
  border-top: 3px solid var(--color-green);
}

.page-about .about-cert__icon {
  width: 48px;
  height: 48px;
  background: var(--color-gradient);
  border-radius: var(--radius);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--color-cream);
  font-weight: 900;
}

.page-about .about-cert h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.page-about .about-cert p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: #c9c4b8;
  margin: 0;
}

.page-about .about-cert__visual {
  background: var(--color-panel);
  padding: 10px;
  border-radius: var(--radius);
}

.page-about .about-cert__visual img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---------- 合作伙伴 ---------- */
.page-about .about-partners {
  background: var(--color-panel-deep);
  border-top: 1px solid rgba(57, 255, 136, 0.15);
}

.page-about .about-partners__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 32px;
}

.page-about .about-partner {
  background: var(--color-panel);
  border-radius: var(--radius);
  padding: 22px 20px;
  border-left: 3px solid transparent;
  transition: border-left-color var(--transition), transform var(--transition), background var(--transition);
}

.page-about .about-partner:hover,
.page-about .about-partner:focus-visible,
.page-about .about-partner:focus-within {
  border-left-color: var(--color-neon);
  transform: translateY(-3px);
  background: #363636;
}

.page-about .about-partner:focus-visible {
  box-shadow: 0 0 0 3px rgba(57, 255, 136, 0.35);
}

.page-about .about-partner__mark {
  width: 40px;
  height: 40px;
  background: var(--color-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  color: var(--color-cream);
  border-radius: var(--radius);
  margin-bottom: 14px;
  font-size: 0.9rem;
}

.page-about .about-partner h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  margin-bottom: 6px;
}

.page-about .about-partner p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: #c9c4b8;
  margin: 0;
}

/* ---------- 尾部导流 ---------- */
.page-about .about-cta__inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-cta__text h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.page-about .about-cta__text p {
  color: #c9c4b8;
  line-height: 1.6;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 64px 0 72px;
    gap: 48px;
  }

  .page-about .about-hero__title {
    font-size: 3rem;
  }

  .page-about .about-hero__lead {
    font-size: 1.05rem;
    margin-bottom: 28px;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
    max-width: 680px;
  }

  .page-about .about-stat {
    min-height: 88px;
  }

  .page-about .about-stat__num {
    font-size: 1.75rem;
  }

  .page-about .about-hero__visual::after {
    display: block;
    content: "";
    position: absolute;
    width: 90px;
    height: 90px;
    right: -10px;
    top: -10px;
    border: 4px solid var(--color-yellow);
    transform: rotate(15deg);
    opacity: 0.7;
    pointer-events: none;
  }
}

@media (min-width: 860px) {
  .page-about .about-story__grid {
    grid-template-columns: 1fr 320px;
    gap: 40px;
  }

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

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

  .page-about .about-cert__visual {
    grid-column: 1 / -1;
    max-width: 620px;
    justify-self: center;
  }

  .page-about .about-partners__list {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-cta__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 900px) {
  .page-about .about-timeline {
    padding-left: 0;
    margin-top: 48px;
  }

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline__item {
    padding: 24px 0;
  }

  .page-about .about-timeline__marker {
    left: 50%;
    top: 52px;
    transform: translateX(-50%) rotate(45deg);
  }

  .page-about .about-timeline__year {
    transform: rotate(-45deg);
  }

  .page-about .about-timeline__item:hover .about-timeline__marker,
  .page-about .about-timeline__item:focus-within .about-timeline__marker,
  .page-about .about-timeline__marker:focus-visible {
    transform: translateX(-50%) rotate(45deg) scale(1.08);
    box-shadow: 0 0 0 4px var(--color-panel-deep), 0 0 28px rgba(78, 57, 246, 0.7);
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__card {
    margin-right: calc(50% + 40px);
    border-left: none;
    border-right: 3px solid var(--color-purple);
    text-align: right;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    margin-left: calc(50% + 40px);
  }
}