.page-about {
  --about-gold-line: rgba(201, 162, 39, .35);
  --about-ink-soft: rgba(10, 26, 47, .72);
  background: var(--color-cream);
  color: var(--color-deep-blue);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ===== 页面头部区域 ===== */
.page-about .about-hero {
  position: relative;
  padding: var(--space-6) 0 var(--space-10);
  border-bottom: 1px solid var(--about-gold-line);
  overflow: hidden;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.page-about .about-hero__text {
  max-width: 680px;
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5.5vw, 4.2rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: .02em;
  margin: var(--space-4) 0 var(--space-5);
  color: var(--color-deep-blue);
}

.page-about .about-hero__em {
  display: inline-block;
  position: relative;
  color: var(--color-dark-gold);
}

.page-about .about-hero__em::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: .04em;
  width: 100%;
  height: .09em;
  background: linear-gradient(90deg, var(--color-gold), rgba(201, 162, 39, 0));
}

.page-about .about-hero__lead {
  max-width: 34em;
  font-size: 1.02rem;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.page-about .about-hero__aside {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  border-left: 3px solid var(--color-gold);
  padding-left: var(--space-4);
  align-self: start;
}

.page-about .about-hero__num {
  font-family: var(--font-heading);
  font-size: clamp(4rem, 10vw, 6.5rem);
  font-weight: 900;
  line-height: 1;
  color: var(--color-gold);
}

.page-about .about-hero__label {
  font-size: .85rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--color-deep-blue);
}

.page-about .about-watermark {
  position: absolute;
  right: -0.06em;
  top: 32%;
  transform: translateY(-50%);
  z-index: 0;
  font-family: var(--font-heading);
  font-size: clamp(6rem, 20vw, 15rem);
  font-weight: 900;
  line-height: .8;
  color: rgba(10, 26, 47, .045);
  pointer-events: none;
  user-select: none;
}

/* ===== 品牌叙事 ===== */
.page-about .about-story {
  padding: var(--space-10) 0;
}

.page-about .about-story__grid {
  display: grid;
  gap: var(--space-6);
}

.page-about .about-story__aside {
  display: none;
}

.page-about .about-story__content h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.7rem, 3.6vw, 2.7rem);
  font-weight: 900;
  line-height: 1.28;
  margin: var(--space-3) 0 var(--space-5);
  color: var(--color-deep-blue);
}

.page-about .about-story__content p {
  max-width: 44em;
  font-size: 1rem;
  line-height: 1.95;
  color: var(--about-ink-soft);
  margin-bottom: var(--space-4);
}

.page-about .about-story__quote {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.7;
  color: var(--color-dark-gold);
  border-left: 3px solid var(--color-gold);
  padding-left: var(--space-5);
  margin: var(--space-6) 0;
}

.page-about .about-story__figure {
  margin: 0;
  border: 1px solid var(--about-gold-line);
  padding: .5rem;
  background: var(--color-off-white);
}

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

.page-about .about-story__figure figcaption {
  margin-top: .5rem;
  font-family: var(--font-accent);
  font-size: .76rem;
  letter-spacing: .08em;
  color: rgba(10, 26, 47, .55);
}

/* ===== 核心数据 ===== */
.page-about .about-stats {
  position: relative;
  padding: var(--space-10) 0;
  background: var(--color-deep-blue);
  color: var(--color-off-white);
}

.page-about .about-stats::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-red), var(--color-gold) 70%, transparent);
}

.page-about .about-stats__head {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.page-about .about-stats__title {
  font-family: var(--font-heading);
  font-size: clamp(1.7rem, 3.4vw, 2.7rem);
  font-weight: 900;
  color: var(--color-off-white);
}

.page-about .about-stats__desc {
  max-width: 26em;
  font-size: .95rem;
  line-height: 1.75;
  color: rgba(247, 243, 232, .66);
}

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid rgba(201, 162, 39, .3);
  border-left: 1px solid rgba(201, 162, 39, .3);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-6) var(--space-4);
  border-right: 1px solid rgba(201, 162, 39, .3);
  border-bottom: 1px solid rgba(201, 162, 39, .3);
}

.page-about .about-stat__value {
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--color-gold);
}

.page-about .about-stat__unit {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-light-gold);
  margin-left: .15em;
}

.page-about .about-stat__label {
  font-size: .88rem;
  letter-spacing: .08em;
  color: rgba(247, 243, 232, .7);
}

/* ===== 发展里程碑 ===== */
.page-about .about-timeline {
  padding: var(--space-10) 0;
}

.page-about .about-timeline__title {
  font-family: var(--font-heading);
  font-size: clamp(1.7rem, 3.4vw, 2.7rem);
  font-weight: 900;
  line-height: 1.3;
  color: var(--color-deep-blue);
}

.page-about .about-timeline__layout {
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-8);
}

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

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: .3rem;
  bottom: .3rem;
  width: 2px;
  background: linear-gradient(180deg, var(--color-gold), var(--color-dark-gold));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 var(--space-6) 42px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__marker {
  position: absolute;
  left: 0;
  top: .3rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-cream);
  border: 3px solid var(--color-gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, .2);
}

.page-about .about-timeline__card {
  padding: var(--space-5);
  background: var(--color-off-white);
  border: 1px solid rgba(10, 26, 47, .08);
  transition: border-color var(--transition-speed) ease;
}

.page-about .about-timeline__card:hover {
  border-color: var(--color-gold);
}

.page-about .about-timeline__card .tag {
  display: inline-block;
  margin-bottom: var(--space-3);
}

.page-about .about-timeline__card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 var(--space-2);
  color: var(--color-deep-blue);
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

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

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-timeline__figure figcaption {
  margin-top: .5rem;
  font-family: var(--font-accent);
  font-size: .76rem;
  letter-spacing: .06em;
  color: rgba(10, 26, 47, .55);
}

/* ===== 资质与认证 ===== */
.page-about .about-credentials {
  padding: var(--space-10) 0;
}

.page-about .about-credentials__grid {
  display: grid;
  gap: var(--space-8);
}

.page-about .about-credentials__intro h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.7rem, 3.4vw, 2.7rem);
  font-weight: 900;
  line-height: 1.28;
  color: var(--color-deep-blue);
}

.page-about .about-credentials__intro p {
  max-width: 28em;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .about-credentials__list {
  border-top: 1px solid rgba(10, 26, 47, .12);
}

.page-about .about-credential {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  border-bottom: 1px solid rgba(10, 26, 47, .12);
}

.page-about .about-credential__index {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--color-red);
}

.page-about .about-credential__info h3 {
  margin: 0 0 var(--space-2);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-deep-blue);
}

.page-about .about-credential__info p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* ===== 团队与组织 ===== */
.page-about .about-team {
  padding: var(--space-10) 0;
}

.page-about .about-team__head {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.page-about .about-team__head h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.7rem, 3.4vw, 2.7rem);
  font-weight: 900;
  color: var(--color-deep-blue);
}

.page-about .about-team__desc {
  max-width: 32em;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-team__grid {
  display: grid;
  gap: var(--space-5);
}

.page-about .about-team__card {
  position: relative;
  padding: var(--space-6) var(--space-5);
  background: var(--color-off-white);
  border: 1px solid rgba(201, 162, 39, .22);
  border-top: 4px solid var(--color-gold);
}

.page-about .about-team__num {
  display: block;
  margin-bottom: var(--space-3);
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--color-red);
}

.page-about .about-team__card h3 {
  margin: 0 0 var(--space-3);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--color-deep-blue);
}

.page-about .about-team__card p {
  margin: 0 0 var(--space-4);
  font-size: .95rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-team__figure {
  margin: var(--space-8) 0 0;
  text-align: center;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  max-width: 600px;
  height: auto;
  margin: 0 auto;
  object-fit: cover;
}

.page-about .about-team__figure figcaption {
  margin-top: .5rem;
  font-family: var(--font-accent);
  font-size: .76rem;
  letter-spacing: .06em;
  color: rgba(10, 26, 47, .55);
}

/* ===== 下一步引导 ===== */
.page-about .about-next {
  position: relative;
  padding: var(--space-10) 0;
  background: var(--color-deep-blue);
  color: var(--color-off-white);
}

.page-about .about-next::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-gold), var(--color-red));
}

.page-about .about-next__head h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3.2vw, 2.5rem);
  font-weight: 900;
  color: var(--color-off-white);
  margin-bottom: var(--space-6);
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.page-about .about-next__link {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  padding: var(--space-5);
  border: 1px solid rgba(201, 162, 39, .35);
  text-decoration: none;
  color: var(--color-off-white);
  transition: background var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.page-about .about-next__link:hover {
  background: rgba(201, 162, 39, .1);
  border-color: var(--color-gold);
}

.page-about .about-next__link-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-gold);
}

.page-about .about-next__link-desc {
  font-size: .88rem;
  line-height: 1.6;
  color: rgba(247, 243, 232, .7);
}

/* ===== 响应式 ===== */
@media (min-width: 720px) {
  .page-about .about-stats__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stat {
    padding: var(--space-8) var(--space-5);
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .page-about .about-hero__aside {
    align-self: end;
  }

  .page-about .about-story__grid {
    grid-template-columns: 150px minmax(0, 1fr) 360px;
    gap: var(--space-8);
  }

  .page-about .about-story__aside {
    display: block;
    writing-mode: vertical-rl;
    white-space: nowrap;
    font-family: var(--font-accent);
    font-size: .8rem;
    letter-spacing: .28em;
    color: rgba(10, 26, 47, .5);
    border-left: 1px solid var(--color-dark-gold);
    padding-left: var(--space-3);
    align-self: start;
  }

  .page-about .about-stats__head {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .page-about .about-timeline__layout {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: var(--space-8);
  }

  .page-about .about-timeline__figure {
    position: sticky;
    top: var(--space-6);
    align-self: start;
  }

  .page-about .about-credentials__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
    gap: var(--space-12);
  }
}