.page-about {
  background:
    radial-gradient(1100px 520px at 88% -8%, rgba(76, 29, 149, 0.38), transparent 62%),
    radial-gradient(820px 460px at -12% 24%, rgba(49, 46, 129, 0.32), transparent 58%),
    linear-gradient(180deg, #0a0e1a 0%, #0d1322 50%, #0a0e1a 100%);
  color: var(--color-text-body);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ===== 首屏框景 ===== */
.page-about .about-hero {
  padding: 36px 0 24px;
}

.page-about .about-hero__frame {
  position: relative;
  background: linear-gradient(135deg, rgba(21, 27, 46, 0.85), rgba(10, 14, 26, 0.6));
  padding: 32px 24px 36px;
  overflow: hidden;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -80px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.16), transparent 65%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  position: relative;
  z-index: 1;
}

.page-about .about-hero h1 {
  margin: 14px 0 16px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 32px;
  line-height: 1.22;
  letter-spacing: 0.02em;
  color: var(--color-text-strong);
}

.page-about .about-hero__lead {
  max-width: 62ch;
  font-size: 15px;
  color: var(--color-text-body);
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.page-about .about-hero__side {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.page-about .about-hero__stat {
  background: rgba(21, 27, 46, 0.72);
  border: 1px solid rgba(245, 158, 11, 0.18);
  border-radius: var(--radius-m);
  padding: 16px 10px;
  text-align: center;
  transition: border-color 0.3s, background 0.3s;
}

.page-about .about-hero__stat:hover,
.page-about .about-hero__stat:focus-within {
  border-color: rgba(245, 158, 11, 0.5);
  background: rgba(76, 29, 149, 0.35);
}

.page-about .about-hero__stat-num {
  display: block;
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-accent-gold);
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--color-text-muted);
}

/* ===== 品牌故事 ===== */
.page-about .about-story {
  padding-top: 64px;
}

.page-about .about-story__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

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

.page-about .about-story__figure img {
  border-radius: var(--radius-l);
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-story__content h2 {
  margin: 14px 0 16px;
  font-family: var(--font-heading);
  font-size: 30px;
  font-weight: 700;
  color: var(--color-text-strong);
}

.page-about .about-story__lead {
  margin-bottom: 16px;
  font-size: 17px;
  color: var(--color-text-strong);
}

.page-about .about-story .btn {
  margin-top: 8px;
}

/* ===== 发展里程碑 ===== */
.page-about .about-milestones {
  padding-top: 80px;
}

.page-about .about-milestones__header {
  max-width: 640px;
}

.page-about .about-milestones__header h2,
.page-about .about-categories__header h2,
.page-about .about-services__header h2,
.page-about .about-credits__header h2 {
  margin: 12px 0 12px;
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text-strong);
  letter-spacing: 0.02em;
}

.page-about .about-milestones__header p,
.page-about .about-categories__header p,
.page-about .about-services__header p,
.page-about .about-credits__header p {
  margin: 0;
  color: var(--color-text-muted);
}

.page-about .about-timeline {
  position: relative;
  margin-top: 36px;
}

.page-about .about-timeline__row {
  position: relative;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 18px;
  padding: 14px 0 34px;
}

.page-about .about-timeline__row::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 26px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.55), rgba(124, 58, 237, 0.25));
}

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

.page-about .about-timeline__node {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding-top: 4px;
}

.page-about .about-timeline__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent-gold);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2), 0 0 18px rgba(245, 158, 11, 0.5);
  transition: box-shadow 0.3s, transform 0.3s;
}

.page-about .about-timeline__row:hover .about-timeline__dot,
.page-about .about-timeline__row:focus-within .about-timeline__dot {
  box-shadow: 0 0 0 6px rgba(245, 158, 11, 0.22), 0 0 28px rgba(245, 158, 11, 0.7);
  transform: scale(1.15);
}

.page-about .about-timeline__content {
  padding-top: 0;
}

.page-about .about-timeline__version {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--color-accent-gold);
  background: rgba(245, 158, 11, 0.1);
  border-radius: var(--radius-pill);
  padding: 2px 12px;
  margin-bottom: 8px;
}

.page-about .about-timeline__content h3 {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text-strong);
}

.page-about .about-timeline__content p {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-body);
}

/* ===== 分类体系优化 ===== */
.page-about .about-categories {
  padding-top: 80px;
}

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

.page-about .about-categories__card {
  background: linear-gradient(145deg, rgba(21, 27, 46, 0.78), rgba(10, 14, 26, 0.62));
  border: 1px solid rgba(124, 58, 237, 0.26);
  border-radius: var(--radius-l);
  padding: 24px;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.page-about .about-categories__card:hover,
.page-about .about-categories__card:focus-within {
  border-color: rgba(245, 158, 11, 0.4);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

.page-about .about-categories__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--color-text-strong);
}

.page-about .about-categories__card p {
  margin: 0 0 14px;
  font-size: 14px;
  color: var(--color-text-muted);
}

.page-about .about-categories__card--new {
  border-color: rgba(245, 158, 11, 0.35);
  background: linear-gradient(145deg, rgba(76, 29, 149, 0.35), rgba(21, 27, 46, 0.8));
}

.page-about .about-categories__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
  color: var(--color-text-body);
}

.page-about .about-categories__list li {
  position: relative;
  padding-left: 20px;
}

.page-about .about-categories__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-gold);
  opacity: 0.7;
}

.page-about .about-categories__list--grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.page-about .about-categories__arrow {
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--color-accent-gold);
}

.page-about .about-categories__arrow svg {
  width: 28px;
  height: 28px;
}

.page-about .about-categories__figure {
  margin: 28px 0 0;
}

.page-about .about-categories__figure img {
  border-radius: var(--radius-l);
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ===== 服务能力概览 ===== */
.page-about .about-services {
  padding-top: 80px;
}

.page-about .about-services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.page-about .about-services__item {
  background: linear-gradient(145deg, rgba(21, 27, 46, 0.8), rgba(10, 14, 26, 0.7));
  border: 1px solid transparent;
  border-radius: var(--radius-l);
  padding: 22px 18px;
  text-align: center;
  transition: border-color 0.3s, background 0.3s, transform 0.3s;
}

.page-about .about-services__item:hover,
.page-about .about-services__item:focus-within {
  border-color: rgba(245, 158, 11, 0.45);
  background: linear-gradient(145deg, rgba(76, 29, 149, 0.42), rgba(21, 27, 46, 0.88));
  transform: translateY(-3px);
}

.page-about .about-services__hex {
  display: inline-flex;
  width: 54px;
  height: 54px;
  color: var(--color-accent-gold);
}

.page-about .about-services__hex svg {
  width: 100%;
  height: 100%;
}

.page-about .about-services__hex text {
  fill: currentColor;
  font-size: 15px;
  font-weight: 700;
}

.page-about .about-services__item h3 {
  margin: 12px 0 6px;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text-strong);
}

.page-about .about-services__item p {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-muted);
}

.page-about .about-services__figure {
  margin: 28px 0 0;
}

.page-about .about-services__figure img {
  border-radius: var(--radius-l);
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ===== 资质与行业认可 ===== */
.page-about .about-credits {
  padding-top: 80px;
}

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

.page-about .about-credits__item {
  position: relative;
  background: linear-gradient(145deg, rgba(21, 27, 46, 0.82), rgba(10, 14, 26, 0.5));
  border: 1px solid rgba(124, 58, 237, 0.18);
  border-radius: var(--radius-l);
  padding: 26px 24px 26px 92px;
  transition: border-color 0.3s, background 0.3s;
}

.page-about .about-credits__item:hover,
.page-about .about-credits__item:focus-within {
  border-color: rgba(245, 158, 11, 0.45);
  background: linear-gradient(145deg, rgba(76, 29, 149, 0.4), rgba(10, 14, 26, 0.6));
}

.page-about .about-credits__num {
  position: absolute;
  left: 24px;
  top: 26px;
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: rgba(245, 158, 11, 0.8);
}

.page-about .about-credits__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text-strong);
}

.page-about .about-credits__item p {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-muted);
}

/* ===== 探索更多 ===== */
.page-about .about-next {
  padding: 80px 0 24px;
}

.page-about .about-next__inner {
  position: relative;
  background: linear-gradient(135deg, rgba(76, 29, 149, 0.32), rgba(21, 27, 46, 0.85));
  border: 1px solid rgba(245, 158, 11, 0.22);
  border-radius: var(--radius-l);
  padding: 40px 28px;
  text-align: center;
  overflow: hidden;
}

.page-about .about-next__inner::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -60px;
  transform: translateX(-50%);
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.14), transparent 60%);
  pointer-events: none;
}

.page-about .about-next__inner h2 {
  margin: 12px 0 20px;
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text-strong);
}

.page-about .about-next__links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

/* ===== 平板 / 桌面增强 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 52px 0 36px;
  }

  .page-about .about-hero__frame {
    padding: 52px 52px 60px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 1.65fr 1fr;
    align-items: center;
    gap: 40px;
  }

  .page-about .about-hero h1 {
    font-size: 46px;
  }

  .page-about .about-hero__lead {
    font-size: 16px;
  }

  .page-about .about-hero__side {
    gap: 14px;
  }

  .page-about .about-hero__stat-num {
    font-size: 32px;
  }

  .page-about .about-categories__compare {
    grid-template-columns: 1fr auto 1fr;
    gap: 28px;
  }

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

  .page-about .about-next__links {
    flex-direction: row;
    gap: 16px;
  }
}

@media (min-width: 992px) {
  .page-about .about-story__grid {
    grid-template-columns: 1fr 1.15fr;
    gap: 56px;
  }

  .page-about .about-story__content h2 {
    font-size: 36px;
  }

  .page-about .about-services__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .about-services__item {
    padding: 28px 24px 26px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-credits__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}