.page-about {
  background-color: var(--color-light);
  color: var(--color-text);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .section {
  padding: 64px 0;
}

.page-about .section__head {
  display: grid;
  grid-template-areas:
    "index title"
    "index note";
  grid-template-columns: auto 1fr;
  column-gap: 16px;
  align-items: baseline;
  margin-bottom: 36px;
}

.page-about .section__index {
  grid-area: index;
  font-family: var(--font-headline);
  font-size: clamp(2.6rem, 7vw, 4rem);
  line-height: 1;
  color: var(--color-accent);
}

.page-about .section__title {
  grid-area: title;
  margin: 0;
}

.page-about .section__note {
  grid-area: note;
  margin: 4px 0 0;
  color: var(--color-muted);
}

.page-about .poster__caption {
  margin-top: 10px;
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* ========== Hero ========== */
.page-about .about-hero {
  background: linear-gradient(135deg, #0A1F44 0%, #0D2A5B 72%, #FF6B35 150%);
  color: #FFFFFF;
  padding: 24px 0 56px;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: -22px;
  height: 64px;
  background: rgba(255, 107, 53, 0.22);
  transform: skewY(-2.5deg);
  z-index: 0;
}

.page-about .about-hero::after {
  content: "18";
  position: absolute;
  right: -10px;
  bottom: -40px;
  font-family: var(--font-headline);
  font-size: clamp(9rem, 22vw, 18rem);
  line-height: 1;
  color: rgba(255, 107, 53, 0.18);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb {
  margin-bottom: 32px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
  margin-top: 40px;
}

@media (min-width: 768px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1fr 280px;
    align-items: end;
    gap: 48px;
  }
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-headline);
  font-size: 0.875rem;
  letter-spacing: 0.16em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.page-about .about-hero h1 {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.12;
  margin: 0 0 20px;
  max-width: 12em;
}

.page-about .about-hero__lead {
  font-size: 1rem;
  line-height: 1.75;
  max-width: 34em;
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
}

.page-about .about-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about .about-hero__fact {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  backdrop-filter: blur(6px);
}

.page-about .about-hero__fact-label {
  margin: 0 0 6px;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
}

.page-about .about-hero__fact-number {
  margin: 0 0 6px;
  font-family: var(--font-headline);
  font-size: 2.6rem;
  line-height: 1;
  color: var(--color-accent);
}

.page-about .about-hero__fact-note {
  margin: 0;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.85);
}

/* ========== 01 我们是谁 ========== */
.page-about .about-intro__grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .about-intro__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
  }
}

.page-about .about-intro__content p + p {
  margin-top: 16px;
}

.page-about .about-intro__poster {
  transform: rotate(-2deg);
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.page-about .about-intro__poster[data-visible] {
  transform: rotate(0deg);
}

/* ========== 02 发展历程时间线 ========== */
.page-about .about-timeline {
  background: linear-gradient(180deg, #0A1F44 0%, #0D2A5B 100%);
  color: #FFFFFF;
  padding: 64px 0 72px;
  position: relative;
  overflow: hidden;
}

.page-about .about-timeline .section__title {
  color: #FFFFFF;
}

.page-about .about-timeline .section__note {
  color: rgba(255, 255, 255, 0.7);
}

@media (min-width: 768px) {
  .page-about .about-timeline .section__index {
    font-size: clamp(6rem, 12vw, 10rem);
    color: rgba(255, 255, 255, 0.16);
  }
}

.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
  display: grid;
  gap: 28px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent) 0%, rgba(255, 107, 53, 0.12) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding-left: 36px;
}

.page-about .timeline__dot {
  position: absolute;
  left: 0;
  top: 8px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 4px solid #0A1F44;
  box-shadow: 0 0 0 2px var(--color-accent);
}

.page-about .timeline__card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: transform var(--transition-std), background var(--transition-fast), border-color var(--transition-fast);
}

.page-about .timeline__item:hover .timeline__card,
.page-about .timeline__item:focus-within .timeline__card {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 107, 53, 0.45);
  transform: translateY(-4px);
}

.page-about .timeline__year {
  display: inline-block;
  font-family: var(--font-headline);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-accent);
  background: rgba(255, 107, 53, 0.14);
  border-radius: var(--radius-pill);
  padding: 8px 14px;
  margin-bottom: 12px;
}

.page-about .timeline__card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.page-about .timeline__card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.82);
}

.page-about .timeline__detail {
  margin-top: 12px !important;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 0.9rem !important;
  color: rgba(255, 255, 255, 0.68) !important;
}

@media (min-width: 900px) {
  .page-about .timeline {
    display: block;
  }

  .page-about .timeline__item {
    width: 50%;
    padding-left: 0;
    padding-right: 48px;
    text-align: right;
  }

  .page-about .timeline__item + .timeline__item {
    margin-top: 40px;
  }

  .page-about .timeline__item:nth-child(even) {
    margin-left: 50%;
    padding-left: 48px;
    padding-right: 0;
    text-align: left;
  }

  .page-about .timeline__dot {
    left: auto;
    right: -9px;
  }

  .page-about .timeline__item:nth-child(even) .timeline__dot {
    right: auto;
    left: -9px;
  }
}

/* ========== 03 技术实力与数据体系 ========== */
.page-about .about-tech {
  background: var(--color-white);
  padding: 72px 0;
}

.page-about .about-tech__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 0 0 44px;
}

@media (min-width: 768px) {
  .page-about .about-tech__stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
}

.page-about .about-tech__stat {
  background: linear-gradient(135deg, var(--color-light) 0%, var(--color-light-alt) 100%);
  border-radius: var(--radius-md);
  padding: 22px 16px;
  text-align: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.page-about .about-tech__number {
  display: block;
  font-family: var(--font-headline);
  font-size: 2rem;
  line-height: 1.2;
  color: var(--color-primary);
}

@media (min-width: 768px) {
  .page-about .about-tech__number {
    font-size: 2.6rem;
  }
}

.page-about .about-tech__label {
  display: block;
  margin-top: 6px;
  font-size: 0.875rem;
  color: var(--color-text);
}

.page-about .about-tech__grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .about-tech__grid {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }
}

.page-about .about-tech__panel h3 {
  font-size: 1.4rem;
  line-height: 1.35;
  margin: 0 0 16px;
}

.page-about .about-tech__list {
  margin: 0 0 24px;
  padding-left: 20px;
  display: grid;
  gap: 10px;
}

.page-about .about-tech__list li {
  padding-left: 4px;
}

/* ========== 04 本地化服务承诺 ========== */
.page-about .about-local {
  background: linear-gradient(180deg, var(--color-light-alt) 0%, var(--color-light) 100%);
  padding: 72px 0;
}

.page-about .about-local__grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .about-local__grid {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }
}

.page-about .about-local__content > p {
  font-size: 1.05rem;
  line-height: 1.7;
}

.page-about .about-local__list {
  margin: 18px 0 26px;
  padding-left: 20px;
  display: grid;
  gap: 10px;
}

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

.page-about .about-local__poster {
  transform: rotate(1.5deg);
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.page-about .about-local__poster[data-visible] {
  transform: rotate(0deg);
}

/* ========== CTA ========== */
.page-about .about-cta {
  background: linear-gradient(135deg, #0A1F44 0%, #0D2A5B 55%, #FF6B35 150%);
  color: #FFFFFF;
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-cta__inner {
  display: grid;
  place-items: center;
  gap: 18px;
  text-align: center;
}

.page-about .about-cta h2 {
  font-family: var(--font-headline);
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  margin: 0;
}

.page-about .about-cta p {
  margin: 0;
  max-width: 32em;
  color: rgba(255, 255, 255, 0.85);
}

/* ========== 动效增强与可访问性 ========== */
@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .about-intro__poster,
  .page-about .about-local__poster {
    transform: none;
  }
}

@media (scripting: none) {
  .page-about [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}