.page-about {
  --about-shadow-sm: 0 4px 18px rgba(8, 19, 46, 0.06);
  --about-shadow-md: 0 12px 32px rgba(8, 19, 46, 0.10);
  --about-line: var(--gray-300);
  color: var(--gray-900);
  background: var(--white);
}

/* ========== Hero ========== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    radial-gradient(ellipse at 85% 10%, rgba(22, 48, 92, 0.65), transparent 56%),
    var(--navy-950);
  background-size: 42px 42px, 42px 42px, auto, auto;
  color: var(--white);
  padding: 28px 0 56px;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--orange-500) 0, var(--orange-500) 62%, transparent 62%);
}
.page-about .about-hero__breadcrumb {
  margin-bottom: 28px;
}
.page-about .about-hero__breadcrumb .breadcrumb__item,
.page-about .about-hero__breadcrumb .breadcrumb__separator {
  color: rgba(255, 255, 255, 0.72);
}
.page-about .about-hero__breadcrumb .breadcrumb__item[aria-current="page"] {
  color: var(--white);
  font-weight: 600;
}
.page-about .about-hero__kicker {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--orange-400);
}
.page-about .about-hero__title {
  margin: 0 0 18px;
  max-width: 860px;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
}
.page-about .about-hero__lead {
  margin: 0;
  max-width: 720px;
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
}
.page-about .about-hero__anchors {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-top: 28px;
}
.page-about .about-hero__anchor {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  color: var(--white);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.page-about .about-hero__anchor:hover,
.page-about .about-hero__anchor:focus {
  border-color: var(--orange-500);
  background: var(--orange-500);
}

/* ========== Section index ========== */
.page-about .about-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-right: 8px;
  min-width: 28px;
  height: 28px;
  padding: 0 8px;
  border-radius: 999px;
  background: var(--orange-500);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  vertical-align: middle;
}

/* ========== Section head ========== */
.page-about .section-head__kicker {
  display: flex;
  align-items: center;
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--orange-500);
}
.page-about .section-head__title {
  margin: 0 0 10px;
  font-size: clamp(26px, 3.4vw, 34px);
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--gray-900);
}
.page-about .section-head__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray-700);
}

/* ========== Story ========== */
.page-about .about-story {
  background: var(--white);
  padding: 64px 0 72px;
}
.page-about .about-story__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-about .about-story__text {
  margin-top: 18px;
}
.page-about .about-story__text p {
  margin: 0 0 16px;
  line-height: 1.8;
  color: var(--gray-700);
}
.page-about .about-story__text p:last-child {
  margin-bottom: 0;
}
.page-about .about-story__media {
  order: -1;
}
.page-about .about-story__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  box-shadow: var(--about-shadow-md);
}
.page-about .about-story__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ========== Milestones ========== */
.page-about .about-milestones {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(22, 48, 92, 0.4), transparent 60%),
    var(--navy-900);
  color: var(--white);
  padding: 72px 0;
}
.page-about .about-milestones__spine {
  display: none;
}
.page-about .about-milestones .section-head__title {
  color: var(--white);
}
.page-about .about-milestones .section-head__desc {
  color: rgba(255, 255, 255, 0.74);
}
.page-about .about-milestones .section-head__kicker {
  color: var(--orange-400);
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 44px 0 0;
  padding: 0 0 0 48px;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gray-300);
}
.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 28px;
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: -38px;
  top: 14px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--orange-500);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 1px var(--orange-500);
}
.page-about .about-timeline__year {
  display: inline-block;
  padding: 3px 14px;
  border-radius: 999px;
  border: 1px solid var(--orange-500);
  color: var(--orange-400);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 10px;
  background: transparent;
  transition: background 0.2s ease, color 0.2s ease;
}
.page-about .about-timeline__card {
  background: var(--white);
  color: var(--gray-900);
  border: 1px solid var(--gray-300);
  border-radius: 14px;
  padding: 18px 20px;
  box-shadow: 0 4px 16px rgba(8, 19, 46, 0.12);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.page-about .about-timeline__title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 800;
  color: var(--gray-900);
}
.page-about .about-timeline__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray-700);
}
.page-about .about-timeline__item:hover .about-timeline__year {
  background: var(--orange-500);
  color: var(--white);
}
.page-about .about-timeline__item:hover .about-timeline__card {
  border-color: var(--orange-500);
  transform: translateY(-4px);
  box-shadow: 0 10px 26px rgba(8, 19, 46, 0.18);
}

/* ========== Capability ========== */
.page-about .about-capability {
  position: relative;
  overflow: hidden;
  background: var(--gray-100);
  padding: 72px 0;
}
.page-about .about-capability__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.12;
  z-index: 0;
}
.page-about .about-capability .container {
  position: relative;
  z-index: 1;
}
.page-about .about-capability__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 36px;
}
.page-about .about-capability__card {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: 16px;
  padding: 28px 24px;
  box-shadow: var(--about-shadow-sm);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.page-about .about-capability__card:hover {
  transform: translateY(-4px);
  border-color: var(--orange-500);
  box-shadow: var(--about-shadow-md);
}
.page-about .about-capability__number {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 52px;
  font-weight: 700;
  line-height: 1;
  color: var(--navy-900);
  transition: color 0.2s ease;
}
.page-about .about-capability__card:hover .about-capability__number {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--orange-500);
}
.page-about .about-capability__unit {
  margin-left: 4px;
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 700;
}
.page-about .about-capability__label {
  display: block;
  margin-bottom: 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-900);
}
.page-about .about-capability__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray-700);
}

/* ========== Tianjin ========== */
.page-about .about-tianjin {
  position: relative;
  overflow: hidden;
  background: var(--navy-950);
  color: var(--white);
  padding: 72px 0 80px;
}
.page-about .about-tianjin__river {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 320px;
  z-index: 0;
  pointer-events: none;
}
.page-about .about-tianjin .container {
  position: relative;
  z-index: 1;
}
.page-about .about-tianjin .section-head__kicker {
  color: var(--orange-400);
}
.page-about .about-tianjin .section-head__title {
  color: var(--white);
}
.page-about .about-tianjin .section-head__desc {
  color: rgba(255, 255, 255, 0.74);
}
.page-about .about-tianjin__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 40px 0 28px;
}
.page-about .about-tianjin__fact {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 14px;
  padding: 24px;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.page-about .about-tianjin__fact:hover {
  border-color: var(--orange-500);
  background: rgba(255, 107, 44, 0.08);
}
.page-about .about-tianjin__fact .data-number {
  display: block;
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  color: var(--orange-500);
}
.page-about .about-tianjin__fact .data-label {
  display: block;
  margin: 10px 0 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--white);
}
.page-about .about-tianjin__fact p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.75);
}
.page-about .about-tianjin__address {
  margin: 0 0 24px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

/* ========== Service ========== */
.page-about .about-service {
  background: var(--white);
  padding: 72px 0;
}
.page-about .about-service__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}
.page-about .about-service__promises {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 28px 0 24px;
}
.page-about .about-service__promise {
  background: var(--gray-100);
  border-left: 4px solid var(--orange-500);
  border-radius: 14px;
  padding: 24px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.page-about .about-service__promise:hover {
  transform: translateY(-4px);
  box-shadow: var(--about-shadow-sm);
}
.page-about .about-service__promise-title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 800;
  color: var(--gray-900);
}
.page-about .about-service__promise-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray-700);
}
.page-about .about-service__media {
  border-radius: 16px;
}
.page-about .about-service__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  box-shadow: var(--about-shadow-md);
}

/* ========== Tablet + ========== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 48px 0 72px;
  }
  .page-about .about-hero__title {
    font-size: clamp(38px, 5vw, 52px);
  }
  .page-about .about-hero__lead {
    font-size: 18px;
  }
  .page-about .about-story__grid {
    grid-template-columns: 1.4fr 1fr;
    gap: 48px;
    align-items: center;
  }
  .page-about .about-story__media {
    order: 2;
  }
  .page-about .about-story__img {
    aspect-ratio: 10 / 7;
    object-fit: cover;
  }
  .page-about .about-capability__cards {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    align-items: start;
  }
  .page-about .about-capability__card--tall {
    padding-bottom: 52px;
  }
  .page-about .about-capability__card--offset {
    margin-top: 32px;
  }
  .page-about .about-tianjin__facts {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-service__grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: center;
  }
  .page-about .about-service__img {
    aspect-ratio: 4 / 3;
    object-fit: cover;
  }
}

/* ========== Desktop timeline ========== */
@media (min-width: 900px) {
  .page-about .about-timeline {
    padding-left: 0;
    margin-top: 56px;
  }
  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }
  .page-about .about-timeline__item {
    width: 50%;
    padding: 0 48px 40px 0;
  }
  .page-about .about-timeline__item::after {
    left: auto;
    right: -6px;
  }
  .page-about .about-timeline__item:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 40px 48px;
  }
  .page-about .about-timeline__item:nth-child(even)::after {
    right: auto;
    left: -6px;
  }
  .page-about .about-timeline__year {
    margin-bottom: 12px;
  }
  .page-about .about-timeline__card {
    padding: 20px 24px;
  }
}

/* ========== Wide desktop ========== */
@media (min-width: 1200px) {
  .page-about .about-milestones__spine {
    display: block;
    position: absolute;
    left: 28px;
    top: 0;
    bottom: 0;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 120px;
    font-weight: 700;
    letter-spacing: 24px;
    color: var(--white);
    opacity: 0.08;
    pointer-events: none;
    user-select: none;
  }
  .page-about .about-capability__number {
    font-size: 58px;
  }
  .page-about .about-capability__cards {
    gap: 32px;
  }
}