.page-about {
  --about-gold-soft: rgba(201, 162, 75, 0.18);
  --about-gold-line: rgba(201, 162, 75, 0.38);
  --about-dark-teal: #0f4a4e;
  --about-mid-teal: #14565a;
  --about-white-dim: rgba(251, 249, 244, 0.72);
  --about-white-faint: rgba(251, 249, 244, 0.55);
  background: var(--c-bg);
  color: var(--c-ink);
}

/* ---------- 面包屑 ---------- */
.page-about .about-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  padding-top: 28px;
  font-size: 0.875rem;
  line-height: 1.6;
}
.page-about .about-breadcrumb a {
  color: var(--about-white-dim);
  text-decoration: none;
  transition: color 0.2s ease;
}
.page-about .about-breadcrumb a:hover {
  color: var(--c-gold);
}
.page-about .about-breadcrumb .breadcrumb__sep {
  margin: 0 10px;
  color: var(--about-white-faint);
}
.page-about .about-breadcrumb [aria-current="page"] {
  color: var(--c-gold);
}

/* ---------- 首屏品牌封面 ---------- */
.page-about .about-hero {
  background-color: var(--c-primary-dark);
  background-image:
    linear-gradient(rgba(201, 162, 75, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 162, 75, 0.05) 1px, transparent 1px);
  background-size: 36px 36px;
  color: var(--c-white);
  padding-bottom: 56px;
  overflow: hidden;
}

.page-about .about-hero__text {
  position: relative;
  z-index: 1;
  padding-top: 48px;
}

.page-about .about-hero .section-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 20px;
  color: var(--c-gold);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.page-about .about-hero .section-kicker::before {
  content: "";
  width: 40px;
  height: 2px;
  background: var(--c-gold);
  flex: 0 0 auto;
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.4rem, 7vw, 4.5rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--c-white);
}

.page-about .about-hero__slogan {
  display: block;
  margin-top: 12px;
  font-size: clamp(1.125rem, 2.8vw, 2rem);
  font-weight: 900;
  letter-spacing: 0.18em;
  color: var(--c-gold);
}

.page-about .about-hero__lead {
  margin: 28px 0 36px;
  max-width: 660px;
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.9;
  color: var(--about-white-dim);
}

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

.page-about .about-hero__index-item {
  padding: 14px 22px;
  border: 1px solid var(--about-gold-line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
  min-width: 120px;
  transition: background 0.2s ease, transform 0.2s ease;
}
.page-about .about-hero__index-item:hover {
  background: rgba(201, 162, 75, 0.12);
  transform: translateY(-2px);
}

.page-about .about-hero__index-num {
  display: block;
  font-family: var(--font-data);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--c-gold);
  line-height: 1.2;
}

.page-about .about-hero__index-label {
  display: block;
  margin-top: 4px;
  font-size: 0.8125rem;
  color: var(--about-white-faint);
  letter-spacing: 0.04em;
}

.page-about .about-hero__figure {
  margin: 44px 0 0;
  border-top: 1px solid var(--about-gold-line);
  padding-top: 14px;
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.page-about .about-hero__caption {
  margin: 12px 0 0;
  font-size: 0.8125rem;
  color: var(--about-white-faint);
  text-align: right;
  letter-spacing: 0.08em;
}

/* ---------- 品牌起源 ---------- */
.page-about .about-story {
  padding: 72px 0 64px;
}

.page-about .about-story__grid {
  display: grid;
  gap: 32px;
  margin-top: 40px;
}

.page-about .about-story__lead {
  border-left: 3px solid var(--c-gold);
  padding-left: 24px;
}
.page-about .about-story__lead p {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.25rem, 2.2vw, 1.625rem);
  line-height: 1.65;
  color: var(--c-primary);
}

.page-about .about-story__body p {
  margin: 0 0 18px;
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(31, 27, 22, 0.82);
}

.page-about .about-story__more {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid rgba(31, 27, 22, 0.1);
}
.page-about .about-story__more a,
.page-about .about-cred__contact a {
  color: var(--c-primary);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--c-gold);
  text-underline-offset: 4px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}
.page-about .about-story__more a:hover,
.page-about .about-cred__contact a:hover {
  color: var(--c-gold);
}

/* ---------- 数据能力 ---------- */
.page-about .about-data {
  background: var(--c-burgundy);
  color: var(--c-white);
  padding: 76px 0;
}

.page-about .container--narrow {
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.page-about .about-data .section-head {
  text-align: center;
}

.page-about .about-data .section-title {
  color: var(--c-white);
}

.page-about .about-data .section-note {
  color: var(--about-white-dim);
}

.page-about .about-data .section-kicker {
  color: var(--c-gold);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
}

/* 数据卡片 */
.page-about .about-data__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 44px;
}

.page-about .about-data__stat {
  min-height: 170px;
  perspective: 1000px;
}

.page-about .about-data__stat-inner {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 170px;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.page-about .about-data__stat:hover .about-data__stat-inner,
.page-about .about-data__stat:focus-within .about-data__stat-inner {
  transform: rotateY(180deg);
}

.page-about .about-data__stat-front,
.page-about .about-data__stat-back {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px 20px;
  border-radius: var(--radius);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.page-about .about-data__stat-front {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--about-gold-line);
}

.page-about .about-data__stat-back {
  background: var(--c-gold);
  color: var(--c-ink);
  transform: rotateY(180deg);
  padding: 24px 22px;
}

.page-about .about-data__num {
  font-family: var(--font-data);
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--c-gold);
  line-height: 1.1;
}

.page-about .about-data__label {
  margin-top: 8px;
  font-size: 0.9375rem;
  color: var(--about-white-dim);
}

.page-about .about-data__stat-back p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  text-align: center;
}

/* 地图区域 */
.page-about .about-data__map-wrap {
  display: grid;
  gap: 28px;
  margin-top: 56px;
  align-items: center;
}

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

.page-about .about-data__map-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.page-about .about-data__pin {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-gold);
  border: 3px solid var(--c-white);
  box-shadow: 0 0 0 4px var(--about-gold-soft);
  cursor: default;
}

.page-about .about-data__pin em {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 4px 10px;
  background: var(--c-ink);
  color: var(--c-white);
  font-style: normal;
  font-size: 0.75rem;
  font-weight: 700;
  white-space: nowrap;
  border-radius: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.page-about .about-data__pin:hover em,
.page-about .about-data__pin:focus-within em {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.page-about .about-data__pin--1 { top: 20%; left: 22%; }
.page-about .about-data__pin--2 { top: 31%; left: 14%; }
.page-about .about-data__pin--3 { top: 16%; left: 42%; }
.page-about .about-data__pin--4 { top: 34%; left: 54%; }
.page-about .about-data__pin--5 { top: 24%; left: 34%; }

.page-about .about-data__aside h3 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.25rem;
  color: var(--c-white);
}

.page-about .about-data__aside p {
  margin: 0 0 14px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-white-dim);
}

.page-about .about-data__aside-tip {
  display: inline-block;
  font-size: 0.8125rem;
  color: var(--c-gold);
  border-bottom: 1px dashed var(--about-gold-line);
  padding-bottom: 4px;
}

.page-about .about-data__note {
  margin-top: 44px;
  padding: 20px 24px;
  border-left: 3px solid var(--c-gold);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-about .about-data__note p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-white-dim);
}

/* ---------- 里程碑时间线 ---------- */
.page-about .about-milestones {
  padding: 76px 0 72px;
}

.page-about .about-milestones .section-head {
  text-align: center;
  margin-bottom: 48px;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 62px 18px 1fr;
  column-gap: 14px;
  padding-bottom: 42px;
  position: relative;
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__year {
  text-align: right;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--c-primary);
  padding-top: 4px;
  transition: color 0.2s ease, transform 0.2s ease;
}

.page-about .about-timeline__year--now span {
  color: var(--c-gold);
  font-weight: 700;
}

.page-about .about-timeline__track {
  position: relative;
  display: flex;
  justify-content: center;
}

.page-about .about-timeline__track::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: -42px;
  left: 50%;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-gold), var(--about-gold-line));
  transform: translateX(-50%);
}

.page-about .about-timeline__item:last-child .about-timeline__track::before {
  display: none;
}

.page-about .about-timeline__dot {
  position: relative;
  z-index: 1;
  width: 13px;
  height: 13px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--c-white);
  border: 3px solid var(--c-gold);
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.page-about .about-timeline__content h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.125rem;
  color: var(--c-ink);
  transition: color 0.2s ease;
}

.page-about .about-timeline__content p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(31, 27, 22, 0.76);
}

.page-about .about-timeline__item:hover .about-timeline__year {
  color: var(--c-gold);
  transform: translateX(-4px);
}

.page-about .about-timeline__item:hover .about-timeline__dot {
  background: var(--c-gold);
  box-shadow: 0 0 0 6px rgba(201, 162, 75, 0.2);
}

.page-about .about-timeline__item:hover .about-timeline__content h3 {
  color: var(--c-primary);
}

/* ---------- 资质与合作 ---------- */
.page-about .about-cred {
  background: linear-gradient(140deg, var(--about-dark-teal), var(--c-teal) 60%, var(--about-mid-teal));
  color: var(--c-white);
  padding: 76px 0 68px;
}

.page-about .about-cred .section-head {
  text-align: center;
}

.page-about .about-cred .section-title {
  color: var(--c-white);
}

.page-about .about-cred .section-note {
  color: var(--about-white-dim);
}

.page-about .about-cred .section-kicker {
  color: var(--c-gold);
}

.page-about .about-cred__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 44px;
}

.page-about .about-cred__card {
  position: relative;
  border-radius: var(--radius);
  padding: 28px 24px 26px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}
.page-about .about-cred__card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(201, 162, 75, 0.45);
}

.page-about .about-cred__card--gold {
  background: var(--about-gold-soft);
  border-color: var(--about-gold-line);
}
.page-about .about-cred__card--gold:hover {
  background: rgba(201, 162, 75, 0.24);
}

.page-about .about-cred__card--teal {
  background: rgba(27, 107, 108, 0.44);
}
.page-about .about-cred__card--teal:hover {
  background: rgba(27, 107, 108, 0.58);
}

.page-about .about-cred__card--burgundy {
  background: rgba(107, 45, 63, 0.5);
}
.page-about .about-cred__card--burgundy:hover {
  background: rgba(107, 45, 63, 0.64);
}

.page-about .about-cred__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 20px;
  border-radius: 50%;
  border: 1px solid var(--c-gold);
  color: var(--c-gold);
  font-family: var(--font-data);
  font-size: 0.8125rem;
  font-weight: 700;
}

.page-about .about-cred__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.125rem;
  color: var(--c-white);
}

.page-about .about-cred__card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--about-white-dim);
}

/* 资质底部 */
.page-about .about-cred__bottom {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 56px;
  align-items: center;
}

.page-about .about-cred__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.page-about .about-cred__contact h3 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.25rem, 2.4vw, 1.625rem);
  color: var(--c-white);
}

.page-about .about-cred__contact p {
  margin: 0 0 22px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-white-dim);
}

.page-about .about-cred__contact .btn--light {
  display: inline-block;
}

/* ---------- 桌面端增强 ---------- */
@media (min-width: 768px) {
  .page-about .about-story__grid {
    grid-template-columns: 5fr 7fr;
    gap: 56px;
  }

  .page-about .about-data__stats {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .page-about .about-data__map-wrap {
    grid-template-columns: 7fr 5fr;
    gap: 44px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 110px 32px minmax(0, 1fr);
    column-gap: 24px;
    padding-bottom: 52px;
  }

  .page-about .about-timeline__year {
    font-size: 1.125rem;
  }

  .page-about .about-timeline__list {
    max-width: 800px;
    margin: 0 auto;
  }

  .page-about .about-cred__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-about .about-cred__bottom {
    grid-template-columns: 5fr 6fr;
    gap: 52px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__text {
    padding-top: 64px;
  }

  .page-about .about-cred__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}