.page-about {
  --about-accent-line: rgba(0, 212, 255, 0.18);
  position: relative;
}

/* 首屏：品牌精神 */
.page-about .about-hero {
  position: relative;
  padding-top: 24px;
  background:
    radial-gradient(ellipse at 88% 8%, rgba(0, 212, 255, 0.08), transparent 52%),
    repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.015) 0 1px, transparent 1px 14px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 32px;
  margin-top: 28px;
}

.page-about .about-crumb-sep {
  margin: 0 8px;
  color: var(--text-mid);
  font-family: var(--font-mono);
}

.page-about .about-hero-copy .section-kicker {
  margin-bottom: 10px;
}

.page-about .about-hero h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

.page-about .about-hero .section-lead {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-mid);
  max-width: 560px;
  margin: 0;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 32px;
}

.page-about .about-stat-item {
  border-left: 2px solid var(--yellow);
  padding-left: 12px;
}

.page-about .about-stat-item .data-number {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--yellow);
  line-height: 1.15;
}

.page-about .about-stat-item .data-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-mid);
  margin-top: 4px;
  line-height: 1.5;
}

.page-about .about-hero-figure {
  margin: 0;
}

.page-about .about-hero-figure img {
  width: 100%;
  height: auto;
  max-height: 460px;
  object-fit: cover;
  aspect-ratio: 4 / 5;
  clip-path: polygon(0 0, 100% 0, 100% 92%, 12% 100%, 0 88%);
  filter: saturate(0.9) contrast(1.06);
}

/* 品牌故事 */
.page-about .about-origin {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 24px;
  padding-top: 72px;
}

.page-about .about-origin::before {
  content: "";
  position: absolute;
  right: -60px;
  top: 30px;
  width: 160px;
  height: 160px;
  border: 1px dashed var(--about-accent-line);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .about-origin-head {
  max-width: 360px;
  position: relative;
  z-index: 1;
}

.page-about .about-origin-body {
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.page-about .about-origin-body p {
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--text-hi);
  margin: 0 0 16px;
}

.page-about .about-origin-quote {
  margin: 28px 0 0;
  padding: 20px 24px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-left: 3px solid var(--yellow);
  border-radius: 0 12px 12px 0;
}

.page-about .about-origin-quote p {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-style: italic;
  color: var(--text-hi);
  margin: 0;
}

/* 时间轴 */
.page-about .about-timeline {
  padding-top: 72px;
}

.page-about .about-timeline-head {
  max-width: 640px;
  margin-bottom: 28px;
}

.page-about .section-kicker {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-about .about-timeline-head h2,
.page-about .about-capability-head h2,
.page-about .about-promise-head h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  margin: 0 0 12px;
  line-height: 1.25;
}

.page-about .about-timeline-head .section-lead,
.page-about .about-capability-head .section-lead,
.page-about .about-promise-head .section-lead {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-mid);
  margin: 0;
}

.page-about .about-timeline-figure {
  margin: 0 0 36px;
}

.page-about .about-timeline-figure img {
  width: 100%;
  height: auto;
  border-radius: 16px;
  display: block;
}

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

.page-about .about-timeline-list::before {
  content: "";
  position: absolute;
  left: 81px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--line);
}

.page-about .about-milestone {
  position: relative;
  display: grid;
  grid-template-columns: 72px 20px 1fr;
  padding-bottom: 32px;
}

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

.page-about .about-milestone-year {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--yellow);
  text-align: right;
  line-height: 1.2;
  padding-top: 2px;
}

.page-about .about-milestone-line {
  position: relative;
  width: 20px;
}

.page-about .about-milestone-line::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--yellow);
  box-shadow: 0 0 0 4px var(--yellow-soft), 0 0 12px rgba(245, 197, 24, 0.2);
  z-index: 1;
  transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .about-milestone-content {
  position: relative;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: 14px;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-milestone-content h3 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-hi);
  margin: 0 0 6px;
}

.page-about .about-milestone-content p {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--text-mid);
  margin: 0;
}

.page-about .about-milestone:hover .about-milestone-content {
  border-color: var(--yellow);
  background: var(--yellow-soft);
}

.page-about .about-milestone:hover .about-milestone-line::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px var(--cyan-soft), 0 0 12px rgba(0, 212, 255, 0.2);
}

.page-about .about-milestone:hover .about-milestone-content::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 22px;
  width: 8px;
  height: 8px;
  background: var(--yellow-soft);
  border-left: 1px solid var(--yellow);
  border-bottom: 1px solid var(--yellow);
  transform: rotate(45deg);
}

/* 数据能力 */
.page-about .about-capability {
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}

.page-about .about-capability::before {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -120px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, var(--cyan-soft), transparent 70%);
  pointer-events: none;
}

.page-about .about-capability-head {
  margin-bottom: 28px;
  position: relative;
}

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

.page-about .about-capability-figure {
  margin: 0;
}

.page-about .about-capability-figure img {
  width: 100%;
  max-width: 460px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 50%;
  margin: 0 auto;
  display: block;
  filter: drop-shadow(0 0 24px rgba(0, 212, 255, 0.12));
}

.page-about .about-capability-data {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.page-about .about-capacity-card {
  padding: 22px 16px;
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-capacity-card .data-number {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-capacity-card:nth-child(1) .data-number {
  color: var(--yellow);
}

.page-about .about-capacity-card:nth-child(3) .data-number {
  color: var(--green);
}

.page-about .about-capacity-card .data-label {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-mid);
}

.page-about .about-capability-note {
  margin-top: 28px;
  padding: 18px 20px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-left: 3px solid var(--cyan);
  border-radius: 0 14px 14px 0;
  position: relative;
}

.page-about .about-capability-note p {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-mid);
  margin: 0;
}

/* 品牌承诺 */
.page-about .about-promise {
  padding-top: 72px;
}

.page-about .about-promise-head {
  margin-bottom: 28px;
}

.page-about .about-promise-grid {
  display: grid;
  gap: 16px;
}

.page-about .about-promise-item {
  background: var(--bg-carbon);
  border: 1px solid var(--line);
  border-left-width: 3px;
  border-left-color: var(--line);
  border-radius: 16px;
  padding: 26px 20px;
  transition: border-color 0.3s var(--ease), border-left-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-promise-item:hover {
  border-color: var(--cyan);
  border-left-color: var(--cyan);
  transform: translateY(-3px);
}

.page-about .about-promise-index {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--yellow);
  display: block;
  margin-bottom: 14px;
  letter-spacing: 0.05em;
}

.page-about .about-promise-item h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-hi);
  margin: 0 0 10px;
}

.page-about .about-promise-item p {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text-mid);
  margin: 0;
}

/* 内链引导 */
.page-about .about-links {
  padding-top: 64px;
  padding-bottom: 64px;
}

.page-about .about-links-head {
  margin-bottom: 24px;
}

.page-about .about-links-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-hi);
  margin: 0;
}

.page-about .about-links-grid {
  display: grid;
  gap: 16px;
}

.page-about .about-link-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 20px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  text-decoration: none;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-link-card:hover {
  border-color: var(--cyan);
  background: var(--cyan-soft);
  transform: translateY(-2px);
}

.page-about .about-link-label {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-hi);
}

.page-about .about-link-desc {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text-mid);
}

/* 滚动显现 */
.js .page-about .about-milestone[data-reveal] {
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}

.js .page-about .about-milestone[data-reveal][data-reveal-delay="1"] {
  transition-delay: 0.1s;
}

.js .page-about .about-milestone[data-reveal][data-reveal-delay="2"] {
  transition-delay: 0.2s;
}

.js .page-about .about-milestone[data-reveal][data-reveal-delay="3"] {
  transition-delay: 0.3s;
}

.js .page-about .about-milestone[data-reveal][data-reveal-delay="4"] {
  transition-delay: 0.4s;
}

.js .page-about .about-milestone[data-reveal].is-visible {
  opacity: 1;
  transform: translateX(0);
}

.js .page-about .about-capacity-card[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.js .page-about .about-capacity-card[data-reveal][data-reveal-delay="1"] {
  transition-delay: 0.1s;
}

.js .page-about .about-capacity-card[data-reveal][data-reveal-delay="2"] {
  transition-delay: 0.2s;
}

.js .page-about .about-capacity-card[data-reveal][data-reveal-delay="3"] {
  transition-delay: 0.3s;
}

.js .page-about .about-capacity-card[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.js .page-about .about-capability-figure[data-reveal] img {
  transform: scale(0.92);
  transition: transform 0.75s var(--ease);
}

.js .page-about .about-capability-figure[data-reveal].is-visible img {
  transform: scale(1);
}

/* 桌面端 */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding-top: 40px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 1fr 380px;
    gap: 48px;
    align-items: center;
    margin-top: 40px;
  }

  .page-about .about-hero h1 {
    font-size: clamp(2.8rem, 4.5vw, 4.4rem);
  }

  .page-about .about-hero .section-lead {
    font-size: 1.05rem;
  }

  .page-about .about-hero-stats {
    gap: 24px;
    margin-top: 40px;
  }

  .page-about .about-stat-item {
    padding-left: 16px;
  }

  .page-about .about-stat-item .data-number {
    font-size: 1.8rem;
  }

  .page-about .about-hero-figure img {
    max-height: 520px;
  }

  .page-about .about-origin {
    grid-template-columns: 300px 1fr;
    gap: 56px;
    padding-top: 96px;
  }

  .page-about .about-timeline {
    padding-top: 96px;
  }

  .page-about .about-timeline-list::before {
    left: 191px;
  }

  .page-about .about-milestone {
    grid-template-columns: 180px 24px 1fr;
    padding-bottom: 40px;
  }

  .page-about .about-milestone-year {
    font-size: 2rem;
    padding-top: 4px;
  }

  .page-about .about-milestone-content {
    padding: 18px 24px;
    max-width: 620px;
  }

  .page-about .about-milestone-content h3 {
    font-size: 1.08rem;
  }

  .page-about .about-milestone-content p {
    font-size: 0.92rem;
  }

  .page-about .about-capability {
    padding-top: 96px;
  }

  .page-about .about-capability-grid {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }

  .page-about .about-capability-data {
    gap: 18px;
  }

  .page-about .about-promise {
    padding-top: 96px;
  }

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

  .page-about .about-links {
    padding-top: 72px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .page-about [data-reveal] img {
    transition: none;
    opacity: 1 !important;
    transform: none !important;
  }
}