.page-about {
  --about-shadow-deep: 0 20px 48px rgba(0, 0, 0, 0.38);
  --about-glow-soft: 0 0 28px rgba(0, 229, 255, 0.45);
  --about-ink-muted: rgba(26, 26, 26, 0.72);
  --about-line-fade: rgba(0, 229, 255, 0.18);
  overflow-x: hidden;
}

/* ===== Breadcrumb ===== */
.page-about .breadcrumb {
  padding-top: 20px;
  padding-bottom: 4px;
}

/* ===== Hero 首屏 ===== */
.page-about .about-hero {
  position: relative;
  min-height: 480px;
  padding: 36px 24px 28px;
  background: linear-gradient(135deg, var(--deep-space) 0%, var(--deep-space) 56%, var(--ultraviolet) 56.5%, var(--ultraviolet) 100%);
  border-radius: var(--radius-l);
  overflow: hidden;
  margin-bottom: 56px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__content {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(28px, 6vw, 46px);
  line-height: 1.12;
  letter-spacing: 0.01em;
  margin: 10px 0 16px;
  color: var(--paper);
}

.page-about .about-hero__lead {
  color: rgba(245, 240, 225, 0.82);
  font-size: 15px;
  line-height: 1.8;
  font-weight: 300;
  letter-spacing: 0.02em;
  max-width: 640px;
}

.page-about .about-hero__bottom {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 32px;
}

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

.page-about .about-hero__stat {
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-m);
  padding: 14px 10px;
  text-align: center;
  backdrop-filter: blur(6px);
  transition: transform 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}

.page-about .about-hero__stat:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 229, 255, 0.5);
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.page-about .about-hero__label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: rgba(245, 240, 225, 0.68);
  letter-spacing: 0.06em;
}

.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  background: rgba(10, 14, 39, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

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

.page-about .about-hero__figure figcaption,
.page-about .about-arch__figure figcaption,
.page-about .about-team__figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  padding: 10px 14px;
  background: rgba(10, 14, 39, 0.82);
  color: rgba(245, 240, 225, 0.7);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* ===== Section Head 通用 ===== */
.page-about .about-section__head {
  margin-bottom: 32px;
}

.page-about .about-section__head h2 {
  font-family: var(--font-head);
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 700;
  line-height: 1.18;
  color: var(--paper);
  margin: 8px 0 10px;
}

.page-about .about-section__intro {
  color: rgba(245, 240, 225, 0.72);
  font-weight: 300;
  line-height: 1.7;
  font-size: 14px;
  max-width: 560px;
}

/* ===== 品牌理念 ===== */
.page-about .about-principles {
  margin-bottom: 64px;
}

.page-about .about-principles__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-principle-card {
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius-m);
  padding: 24px 22px;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
}

.page-about .about-principle-card::after {
  content: "";
  position: absolute;
  right: -24px;
  top: -24px;
  width: 80px;
  height: 80px;
  background: rgba(0, 229, 255, 0.08);
  border-radius: 50%;
  transition: transform 0.4s var(--ease-out);
}

.page-about .about-principle-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--about-shadow-deep);
}

.page-about .about-principle-card:hover::after {
  transform: scale(1.8);
}

.page-about .about-principle__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan);
  background: rgba(0, 229, 255, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-s);
  letter-spacing: 0.12em;
  margin-bottom: 14px;
}

.page-about .about-principle-card h3 {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 8px;
  letter-spacing: 0.02em;
}

.page-about .about-principle-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-ink-muted);
  margin: 0 0 14px;
}

.page-about .about-principle__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(26, 26, 26, 0.52);
  border-top: 1px solid rgba(26, 26, 26, 0.12);
  padding-top: 10px;
  letter-spacing: 0.04em;
}

/* ===== 发展大事记 ===== */
.page-about .about-milestones {
  margin-bottom: 64px;
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--about-line-fade) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.page-about .about-timeline__rail {
  display: flex;
  justify-content: center;
  padding-top: 20px;
}

.page-about .about-timeline__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.12), 0 0 24px rgba(0, 229, 255, 0.6);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.page-about .about-timeline__item:hover .about-timeline__dot {
  transform: scale(1.4);
  box-shadow: 0 0 0 8px rgba(0, 229, 255, 0.18), 0 0 40px rgba(0, 229, 255, 0.9);
}

.page-about .about-timeline__card {
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius-m);
  padding: 20px 20px 18px;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
}

.page-about .about-timeline__item:hover .about-timeline__card {
  transform: translateY(-3px);
  box-shadow: var(--about-shadow-deep);
}

.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  background: rgba(255, 193, 7, 0.24);
  padding: 3px 10px;
  border-radius: var(--radius-s);
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.page-about .about-timeline__card h3 {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 6px;
  line-height: 1.3;
}

.page-about .about-timeline__card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-ink-muted);
  margin: 0 0 12px;
}

.page-about .about-timeline__detail {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .about-timeline__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(26, 26, 26, 0.66);
  background: rgba(26, 26, 26, 0.06);
  border: 1px solid rgba(26, 26, 26, 0.1);
  padding: 2px 8px;
  border-radius: 30px;
  letter-spacing: 0.03em;
}

/* ===== 技术架构 ===== */
.page-about .about-arch {
  margin-bottom: 64px;
  background: radial-gradient(circle at 85% 15%, rgba(61, 10, 110, 0.55), transparent 58%);
  border-radius: var(--radius-l);
  padding: 32px 0 4px;
}

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

.page-about .about-arch__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-arch-card {
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-m);
  padding: 20px;
  backdrop-filter: blur(8px);
  transition: transform 0.35s var(--ease-out), border-color 0.35s var(--ease-out), background 0.35s var(--ease-out);
}

.page-about .about-arch-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 229, 255, 0.4);
  background: rgba(255, 255, 255, 0.12);
}

.page-about .about-arch__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(0, 229, 255, 0.1);
  border-radius: 10px;
  margin-bottom: 12px;
}

.page-about .about-arch-card h3 {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
  margin: 0 0 6px;
  letter-spacing: 0.02em;
}

.page-about .about-arch-card p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 240, 225, 0.72);
  font-weight: 300;
  margin: 0;
}

.page-about .about-arch__figure {
  margin: 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  background: rgba(10, 14, 39, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

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

/* ===== 团队与荣誉 ===== */
.page-about .about-team {
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius-l);
  padding: 36px 24px 40px;
  margin-bottom: 64px;
}

.page-about .about-team .section-kicker {
  color: var(--ink);
  opacity: 0.65;
}

.page-about .about-team .about-section__head h2 {
  color: var(--ink);
}

.page-about .about-team .about-section__intro {
  color: var(--about-ink-muted);
}

.page-about .about-team__wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  background: rgba(26, 26, 26, 0.05);
  border: 1px solid rgba(26, 26, 26, 0.08);
}

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

.page-about .about-team__figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.6);
  color: rgba(26, 26, 26, 0.66);
  border-top: 1px solid rgba(26, 26, 26, 0.08);
}

.page-about .about-team__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-team__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(26, 26, 26, 0.08);
  border-radius: var(--radius-m);
  padding: 16px 18px;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.page-about .about-team__item:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(26, 26, 26, 0.12);
}

.page-about .about-team__item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-ink-muted);
  margin: 0;
}

/* ===== CTA ===== */
.page-about .about-cta {
  margin-bottom: 48px;
}

.page-about .about-cta__card {
  background: linear-gradient(135deg, rgba(61, 10, 110, 0.75), var(--deep-space));
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: var(--radius-l);
  padding: 32px 24px;
  text-align: center;
}

.page-about .about-cta__card h2 {
  font-family: var(--font-head);
  font-size: 26px;
  font-weight: 700;
  color: var(--paper);
  margin: 0 0 10px;
}

.page-about .about-cta__card p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 240, 225, 0.72);
  max-width: 480px;
  margin: 0 auto 22px;
  font-weight: 300;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 48px 40px 36px;
    min-height: 520px;
  }

  .page-about .about-hero h1 {
    font-size: clamp(32px, 5vw, 46px);
  }

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

  .page-about .about-hero__bottom {
    grid-template-columns: 260px 1fr;
    align-items: end;
    gap: 32px;
    margin-top: 40px;
  }

  .page-about .about-hero__stats {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .page-about .about-hero__stat {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    padding: 12px 16px;
    text-align: left;
  }

  .page-about .about-hero__num {
    font-size: 24px;
  }

  .page-about .about-hero__label {
    margin-top: 0;
    font-size: 12px;
  }

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

  .page-about .about-principle-card:nth-child(2) {
    transform: translateY(24px);
  }

  .page-about .about-principle-card:nth-child(2):hover {
    transform: translateY(20px);
  }

  .page-about .about-timeline__item {
    grid-template-columns: 48px 1fr;
    gap: 20px;
    margin-bottom: 28px;
  }

  .page-about .about-timeline::before {
    left: 23px;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    transform: translateX(14px);
  }

  .page-about .about-timeline__item:nth-child(even):hover .about-timeline__card {
    transform: translateX(14px) translateY(-3px);
  }

  .page-about .about-arch__grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .page-about .about-arch__figure {
    align-self: stretch;
  }

  .page-about .about-arch__figure img {
    height: 100%;
    object-fit: cover;
  }

  .page-about .about-team {
    padding: 44px 40px 48px;
  }

  .page-about .about-team__wrap {
    grid-template-columns: minmax(220px, 320px) 1fr;
    gap: 32px;
  }

  .page-about .about-cta__card {
    padding: 44px 40px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 56px 48px 40px;
  }

  .page-about .about-hero__bottom {
    grid-template-columns: 300px 1fr;
  }

  .page-about .about-principles {
    margin-bottom: 84px;
  }

  .page-about .about-milestones {
    margin-bottom: 84px;
  }

  .page-about .about-arch {
    padding: 40px 0 8px;
    margin-bottom: 84px;
  }

  .page-about .about-team {
    padding: 52px 48px;
    margin-bottom: 84px;
  }

  .page-about .about-section__head {
    margin-bottom: 36px;
  }

  .page-about .about-timeline__card {
    padding: 24px 24px 20px;
  }
}