.page-about {
  --about-ink: #0a1f3c;
  --about-cream: #f5efe0;
  --about-brown: #2b1d14;
  --about-orange: #ff4d2e;
  --about-cyan: #00e5ff;
  --about-bluegray: #c4d1e0;
  --about-creamwhite: #fff8ec;
  --about-navyline: #1a2d4a;
  --about-deep: #0d2a4d;
  background: var(--about-cream);
  color: var(--about-brown);
  overflow-x: hidden;
  font-family: var(--font-body);
}

.page-about .breadcrumbs {
  position: relative;
  z-index: 3;
  padding: 0.875rem var(--gutter);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--about-bluegray);
  background: var(--about-ink);
  border-bottom: 1px solid var(--about-navyline);
}

.page-about .breadcrumbs a {
  color: var(--about-cyan);
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-about .breadcrumbs a:hover {
  color: var(--about-orange);
}

.page-about .breadcrumbs [aria-hidden="true"] {
  color: var(--about-bluegray);
  margin: 0 0.5rem;
}

/* ===== 首屏：杂志封面式 ===== */
.page-about .about-hero {
  position: relative;
  background: var(--about-ink);
  padding-top: clamp(2.5rem, 6vw, 5rem);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--about-orange) 0%, var(--about-cyan) 100%);
  z-index: 2;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 77, 46, 0.18), transparent 70%);
  top: -120px;
  right: -100px;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__layout {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-about .about-hero__eyebrow {
  color: var(--about-cyan);
  margin-bottom: 1rem;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  line-height: 0.96;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  margin: 0 0 1.5rem;
  color: var(--about-creamwhite);
  text-shadow: 5px 5px 0 rgba(0, 0, 0, 0.4);
}

.page-about .about-hero__title span {
  color: var(--about-orange);
}

.page-about .about-hero__lead {
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  line-height: 1.85;
  color: var(--about-bluegray);
  max-width: 62ch;
  margin-bottom: 2rem;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--about-navyline);
  border-bottom: 1px solid var(--about-navyline);
  background: rgba(13, 42, 77, 0.5);
  margin-bottom: 2rem;
}

.page-about .about-hero__stat {
  padding: 1.1rem 0.75rem 1.1rem 0;
  border-right: 1px solid var(--about-navyline);
}

.page-about .about-hero__stat:last-child {
  border-right: none;
}

.page-about .about-hero__stat-num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(1.4rem, 2.6vw, 2.2rem);
  font-weight: 700;
  color: var(--about-creamwhite);
  line-height: 1;
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--about-bluegray);
  font-family: var(--font-data);
}

.page-about .about-hero__media {
  margin: 0;
  border: 4px solid var(--about-navyline);
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero__media .media::after {
  background: var(--about-orange);
}

/* ===== 章节通用 ===== */
.page-about .section {
  padding: clamp(3.5rem, 7vw, 6rem) 0;
}

.page-about .section-head {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
  max-width: 720px;
}

.page-about .section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  line-height: 1.05;
  text-transform: uppercase;
  color: var(--about-brown);
  margin: 0.5rem 0 1rem;
}

.page-about .section-title--light {
  color: var(--about-creamwhite);
}

.page-about .section-desc {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-brown);
  max-width: 65ch;
  margin: 0;
}

.page-about .section-desc--light {
  color: var(--about-bluegray);
}

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

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

/* ===== 品牌里程碑时间轴 ===== */
.page-about .milestone-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.page-about .milestone-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 10px;
  width: 3px;
  background: linear-gradient(180deg, var(--about-orange) 0%, var(--about-cyan) 100%);
  opacity: 0.7;
}

.page-about .milestone-timeline__item {
  position: relative;
  padding-left: 2.5rem;
}

.page-about .milestone-timeline__marker {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
}

.page-about .milestone-timeline__marker::before {
  content: "";
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--about-ink);
  border: 4px solid var(--about-orange);
  box-shadow: 0 0 0 5px var(--about-cream), 4px 4px 0 rgba(0, 0, 0, 0.15);
}

.page-about .milestone-timeline__year {
  position: absolute;
  left: 30px;
  top: 2px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--about-orange);
  white-space: nowrap;
  background: var(--about-cream);
  padding: 0.1rem 0.4rem;
}

.page-about .milestone-timeline__body {
  background: var(--about-creamwhite);
  border-left: 4px solid var(--about-orange);
  padding: 1.25rem 1.25rem 1.25rem 1.5rem;
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.06);
}

.page-about .milestone-timeline__heading {
  font-family: var(--font-display);
  font-size: 1.2rem;
  line-height: 1.3;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--about-ink);
  margin: 0 0 0.6rem;
}

.page-about .milestone-timeline__body p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--about-brown);
  margin: 0;
}

/* ===== 数据引擎 ===== */
.page-about .data-engine__layout {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.page-about .data-engine__content {
  flex: 1 1 55%;
}

.page-about .data-engine__visual {
  flex: 1 1 45%;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.page-about .data-engine__list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 2rem;
  border-top: 1px solid var(--about-navyline);
}

.page-about .data-engine__row {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--about-navyline);
}

.page-about .data-engine__row-icon {
  font-size: 1.3rem;
  color: var(--about-orange);
  flex-shrink: 0;
  line-height: 1.4;
}

.page-about .data-engine__row strong {
  display: block;
  font-family: var(--font-data);
  font-size: 1rem;
  letter-spacing: 0.03em;
  color: var(--about-creamwhite);
  margin-bottom: 0.25rem;
}

.page-about .data-engine__row p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--about-bluegray);
  margin: 0;
  max-width: 56ch;
}

.page-about .data-engine__visual .media {
  border: 3px solid var(--about-navyline);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.35);
}

.page-about .data-engine__graph {
  width: 100%;
  height: auto;
  max-height: 280px;
  border: 1px solid var(--about-navyline);
  background: linear-gradient(145deg, rgba(13, 42, 77, 0.8), rgba(10, 31, 60, 0.9));
  padding: 1rem;
  box-sizing: border-box;
}

/* ===== 团队与文化 ===== */
.page-about .team__layout {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.page-about .team__media-wrap {
  position: relative;
  flex: 1 1 42%;
}

.page-about .team__media {
  border: 4px solid var(--about-ink);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.12);
  margin: 0;
}

.page-about .team__badge {
  position: absolute;
  right: -0.75rem;
  bottom: -1.25rem;
  background: var(--about-orange);
  color: var(--about-creamwhite);
  padding: 0.9rem 1.2rem;
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.25);
  text-align: center;
  transform: rotate(-2deg);
}

.page-about .team__badge-num {
  display: block;
  font-family: var(--font-data);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1;
}

.page-about .team__badge-label {
  display: block;
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 0.3rem;
}

.page-about .team__content {
  flex: 1 1 58%;
}

.page-about .team__heading {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  text-transform: uppercase;
  color: var(--about-ink);
  margin: 1.5rem 0 1rem;
}

.page-about .team__text {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--about-brown);
  margin-bottom: 1.75rem;
}

.page-about .team__values {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .team__values li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--about-creamwhite);
  border-left: 4px solid var(--about-cyan);
  padding: 1rem 1.1rem;
}

.page-about .team__value-num {
  font-family: var(--font-data);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--about-orange);
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.page-about .team__values strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--about-ink);
  margin-bottom: 0.2rem;
}

.page-about .team__values p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--about-brown);
  margin: 0;
}

/* ===== 资质与合作 ===== */
.page-about .certs__grid {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.page-about .cert-card {
  position: relative;
  background: rgba(13, 42, 77, 0.55);
  border: 1px solid var(--about-navyline);
  border-top: 4px solid var(--about-orange);
  padding: 1.75rem 1.5rem 1.5rem;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-about .cert-card:hover {
  transform: translateY(-4px);
  border-color: var(--about-cyan);
}

.page-about .cert-card__num {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--about-orange);
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.page-about .cert-card__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  text-transform: uppercase;
  color: var(--about-creamwhite);
  margin: 0 0 0.75rem;
  line-height: 1.35;
}

.page-about .cert-card__text {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--about-bluegray);
  margin: 0 0 0.75rem;
}

.page-about .cert-card__text:last-child {
  margin-bottom: 0;
}

.page-about .cert-card__text a {
  color: var(--about-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .cert-card__text a:hover {
  color: var(--about-orange);
}

.page-about .cert-icp {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
  border: 1px dashed var(--about-navyline);
  padding: 0.75rem 1rem;
  background: rgba(10, 31, 60, 0.4);
}

.page-about .cert-icp__label {
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--about-bluegray);
}

.page-about .cert-icp__code {
  font-family: var(--font-data);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--about-creamwhite);
}

/* ===== CTA 区 ===== */
.page-about .about-cta {
  background: var(--about-ink);
  position: relative;
  overflow: hidden;
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: repeating-linear-gradient(135deg, var(--about-orange) 0px, var(--about-orange) 12px, transparent 12px, transparent 24px);
}

.page-about .about-cta__box {
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  line-height: 1.15;
  text-transform: uppercase;
  color: var(--about-creamwhite);
  margin: 0.75rem 0 1rem;
}

.page-about .about-cta__text {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--about-bluegray);
  margin-bottom: 2rem;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .page-about .about-hero__layout {
    flex-direction: row;
    align-items: flex-end;
  }

  .page-about .about-hero__content {
    flex: 1 1 55%;
  }

  .page-about .about-hero__media {
    flex: 1 1 45%;
    margin-bottom: -2.5rem;
  }

  .page-about .milestone-timeline {
    gap: 3rem;
  }

  .page-about .milestone-timeline::before {
    left: 220px;
  }

  .page-about .milestone-timeline__item {
    padding-left: 260px;
  }

  .page-about .milestone-timeline__marker {
    left: 220px;
    transform: translateX(-50%);
    flex-direction: column;
    gap: 0.4rem;
  }

  .page-about .milestone-timeline__year {
    position: static;
    background: transparent;
    font-size: 1rem;
    color: var(--about-ink);
  }

  .page-about .data-engine__layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-about .team__layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-about .team__media-wrap {
    flex: 0 0 42%;
  }

  .page-about .team__content {
    flex: 1;
    padding-top: 0;
  }

  .page-about .team__heading {
    margin-top: 0;
  }

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

@media (min-width: 1024px) {
  .page-about .about-hero__stats {
    max-width: 85%;
  }

  .page-about .cert-card {
    padding: 2rem 1.75rem 1.75rem;
  }
}