.page-about {
  --about-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --about-stripe: rgba(255, 107, 53, 0.08);
  --about-stripe-alt: rgba(123, 47, 190, 0.1);
  position: relative;
  background: var(--bg-deep);
  color: var(--text-main);
  overflow-x: hidden;
}

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

.page-about .sec-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-green);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-about .sec-label::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--accent-orange);
  transform: skewX(-24deg);
}

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  line-height: 1.25;
  margin: 14px 0 18px;
  letter-spacing: 0.01em;
}

.page-about .section-note {
  max-width: 680px;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin: 0;
}

/* ============ 页头 ============ */
.page-about .about-hero {
  position: relative;
  padding: 72px 0 88px;
  background:
    radial-gradient(circle at 72% 20%, rgba(123, 47, 190, 0.18) 0%, transparent 46%),
    linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-deep) 100%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .hero-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-about .hero-shape {
  position: absolute;
  display: block;
}

.page-about .hero-shape-a {
  right: -2.5rem;
  top: 14%;
  width: 320px;
  height: 320px;
  border: 1px solid rgba(255, 107, 53, 0.18);
  transform: rotate(24deg);
  border-radius: 12px;
}

.page-about .hero-shape-b {
  right: 12%;
  bottom: -8rem;
  width: 260px;
  height: 260px;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 12px,
    rgba(15, 255, 80, 0.035) 12px,
    rgba(15, 255, 80, 0.035) 14px
  );
  border-radius: 50%;
}

.page-about .hero-shape-c {
  left: -5rem;
  bottom: 0;
  width: 180px;
  height: 180px;
  background: linear-gradient(135deg, var(--about-stripe), transparent 70%);
  transform: skewX(-18deg);
}

.page-about .hero-grid {
  align-items: center;
}

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

.page-about .page-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 6vw, 5rem);
  line-height: 1.08;
  margin: 16px 0 20px;
  letter-spacing: 0.02em;
  color: var(--text-main);
}

.page-about .page-lead {
  max-width: 640px;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin: 0;
}

.page-about .hero-aside {
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  z-index: 1;
}

.page-about .hero-tag {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  background: rgba(22, 33, 62, 0.66);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent-orange);
  transform: skewX(-6deg);
}

.page-about .hero-tag:nth-child(2) {
  border-left-color: var(--accent-purple);
}

.page-about .hero-tag:nth-child(3) {
  border-left-color: var(--accent-green);
}

.page-about .hero-tag-key {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent-orange);
  white-space: nowrap;
}

.page-about .hero-tag:nth-child(2) .hero-tag-key {
  color: var(--accent-purple);
}

.page-about .hero-tag:nth-child(3) .hero-tag-key {
  color: var(--accent-green);
}

.page-about .hero-tag-txt {
  color: var(--text-main);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
}

/* ============ 品牌起源 ============ */
.page-about .origin-section {
  background: var(--bg-deep);
}

.page-about .origin-grid {
  align-items: center;
  row-gap: 40px;
}

.page-about .origin-media {
  aspect-ratio: 1 / 1;
  position: relative;
  clip-path: polygon(0 0, 100% 4%, 96% 100%, 4% 96%);
  border: 1px solid var(--line);
}

.page-about .origin-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.page-about .origin-copy {
  padding-left: 0;
}

.page-about .origin-copy p {
  color: var(--text-muted);
  line-height: 1.8;
  margin: 0 0 16px;
  max-width: 720px;
}

.page-about .origin-points {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .origin-points li {
  position: relative;
  padding-left: 26px;
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.6;
}

.page-about .origin-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 14px;
  height: 2px;
  background: var(--accent-green);
  transform: skewX(-20deg);
}

/* ============ 发展里程碑 ============ */
.page-about .milestone-section {
  background:
    linear-gradient(110deg, rgba(123, 47, 190, 0.08) 0%, transparent 34%),
    var(--bg-dark);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .milestone-head {
  margin-bottom: 48px;
}

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

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 12px;
  left: 7px;
  width: 2px;
  background: linear-gradient(
    180deg,
    var(--accent-orange) 0%,
    var(--accent-purple) 50%,
    var(--accent-green) 100%
  );
  opacity: 0.42;
}

.page-about .timeline-item {
  position: relative;
  padding: 0 0 52px 40px;
  margin: 0;
}

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

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-orange);
  border: 2px solid var(--bg-dark);
  box-shadow: 0 0 0 2px rgba(255, 107, 53, 0.7);
  z-index: 1;
}

.page-about .timeline-item:nth-child(2)::before {
  background: var(--accent-purple);
  box-shadow: 0 0 0 2px rgba(123, 47, 190, 0.7);
}

.page-about .timeline-item:nth-child(3)::before {
  background: var(--accent-green);
  box-shadow: 0 0 0 2px rgba(15, 255, 80, 0.7);
}

.page-about .timeline-card {
  position: relative;
  padding: 22px 24px;
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-deep) 100%);
  border: 1px solid var(--line);
  border-radius: 0 8px 8px 0;
  box-shadow: 0 12px 24px var(--shadow);
}

.page-about .timeline-card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 16px;
  bottom: 16px;
  width: 3px;
  background: var(--accent-orange);
}

.page-about .timeline-item:nth-child(2) .timeline-card::before {
  background: var(--accent-purple);
}

.page-about .timeline-item:nth-child(3) .timeline-card::before {
  background: var(--accent-green);
}

.page-about .timeline-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--accent-orange);
  background: rgba(255, 107, 53, 0.08);
  border: 1px solid rgba(255, 107, 53, 0.22);
  padding: 4px 10px;
  border-radius: 2px;
  margin-bottom: 12px;
}

.page-about .timeline-item:nth-child(2) .timeline-year {
  color: var(--accent-purple);
  border-color: rgba(123, 47, 190, 0.3);
  background: rgba(123, 47, 190, 0.1);
}

.page-about .timeline-item:nth-child(3) .timeline-year {
  color: var(--accent-green);
  border-color: rgba(15, 255, 80, 0.3);
  background: rgba(15, 255, 80, 0.08);
}

.page-about .timeline-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  margin: 0 0 10px;
  color: var(--text-main);
}

.page-about .timeline-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* ============ 技术实力 ============ */
.page-about .tech-section {
  background: linear-gradient(120deg, rgba(123, 47, 190, 0.12) 0%, transparent 42%);
  overflow: hidden;
}

.page-about .tech-stripes {
  position: absolute;
  top: 0;
  bottom: 0;
  right: -80px;
  width: 260px;
  pointer-events: none;
}

.page-about .tech-stripes span {
  position: absolute;
  width: 2px;
  height: 120%;
  background: var(--line);
  opacity: 0.5;
  transform: rotate(22deg);
  transform-origin: top center;
}

.page-about .tech-stripes span:nth-child(1) {
  left: 0;
  top: -40px;
}

.page-about .tech-stripes span:nth-child(2) {
  left: 40px;
  top: -80px;
  opacity: 0.25;
}

.page-about .tech-stripes span:nth-child(3) {
  left: 80px;
  top: -30px;
  opacity: 0.15;
}

.page-about .tech-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 44px 0 36px;
}

.page-about .tech-stat {
  position: relative;
  padding: 26px 18px;
  background: rgba(22, 33, 62, 0.7);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent-orange);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-about .tech-stat:nth-child(2) {
  border-left-color: var(--accent-purple);
}

.page-about .tech-stat:nth-child(3) {
  border-left-color: var(--accent-green);
}

.page-about .tech-stat:nth-child(4) {
  border-left-color: var(--accent-orange);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 2.4rem;
  line-height: 1.1;
  color: var(--text-main);
}

.page-about .stat-zh {
  font-family: var(--font-body);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--accent-orange);
  margin-left: 3px;
}

.page-about .tech-stat:nth-child(2) .stat-zh {
  color: var(--accent-purple);
}

.page-about .tech-stat:nth-child(3) .stat-zh {
  color: var(--accent-green);
}

.page-about .stat-label {
  display: block;
  margin-top: 10px;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.page-about .tech-grid {
  row-gap: 36px;
}

.page-about .tech-features {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .tech-feature {
  position: relative;
  padding: 24px 24px 24px 48px;
  background: rgba(22, 33, 62, 0.56);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .tech-feature::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 20px;
  width: 4px;
  background: linear-gradient(180deg, var(--accent-orange), var(--accent-purple));
  transform: skewX(-14deg);
  transform-origin: top;
}

.page-about .feature-index {
  position: absolute;
  left: 14px;
  top: 22px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.78rem;
  color: var(--accent-green);
  line-height: 1;
  width: 20px;
  text-align: center;
}

.page-about .tech-feature h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 0 10px;
  color: var(--text-main);
}

.page-about .tech-feature p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

.page-about .tech-media-col {
  align-self: center;
}

.page-about .tech-media {
  aspect-ratio: 5 / 3;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .tech-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* ============ 团队与文化 ============ */
.page-about .culture-section {
  background:
    linear-gradient(115deg, rgba(255, 107, 53, 0.05) 0%, transparent 30%),
    var(--bg-dark);
  border-top: 1px solid var(--line);
}

.page-about .culture-grid {
  row-gap: 40px;
}

.page-about .culture-copy .culture-lead {
  color: var(--text-muted);
  line-height: 1.8;
  font-size: 1rem;
  margin: 0;
  max-width: 680px;
}

.page-about .culture-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  counter-reset: culture-counter;
  display: grid;
  gap: 14px;
}

.page-about .culture-list li {
  counter-increment: culture-counter;
  position: relative;
  padding: 18px 18px 18px 50px;
  background: rgba(22, 33, 62, 0.62);
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent-green);
  border-radius: var(--radius);
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-about .culture-list li::before {
  content: "0" counter(culture-counter);
  position: absolute;
  left: 14px;
  top: 18px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent-green);
}

.page-about .culture-media-col {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-about .culture-media {
  aspect-ratio: 5 / 3;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transform: rotate(0.4deg);
}

.page-about .culture-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.page-about .culture-statement {
  margin: 0;
  padding: 18px 20px;
  border-left: 3px solid var(--accent-purple);
  background: rgba(123, 47, 190, 0.08);
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ============ CTA区 ============ */
.page-about .cta-zone {
  padding: 72px 0;
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-dark) 100%);
  border-top: 1px solid var(--line);
  overflow: hidden;
}

.page-about .cta-orbit {
  position: absolute;
  right: -120px;
  bottom: -160px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  border: 1px solid rgba(15, 255, 80, 0.14);
  box-shadow:
    0 0 0 40px rgba(15, 255, 80, 0.03),
    0 0 0 80px rgba(15, 255, 80, 0.02);
}

.page-about .cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 28px;
  align-items: flex-start;
}

.page-about .cta-copy h2 {
  margin-top: 0;
}

.page-about .cta-copy p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.8;
  margin: 0;
  max-width: 640px;
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .cta-actions .btn {
  transform: skewX(-4deg);
}

.page-about .cta-actions .btn > * {
  transform: skewX(4deg);
}

/* ============ 响应式 ============ */
@media (min-width: 768px) {
  .page-about .section {
    padding: 88px 0;
  }

  .page-about .about-hero {
    padding: 96px 0 112px;
  }

  .page-about .hero-aside {
    padding-left: 32px;
  }

  .page-about .hero-tag {
    padding: 18px 22px;
  }

  .page-about .tech-stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .page-about .tech-stat {
    padding: 30px 22px;
  }

  .page-about .cta-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .page-about .cta-copy {
    flex: 1;
  }
}

@media (min-width: 960px) {
  .page-about .section {
    padding: 104px 0;
  }

  .page-about .origin-media {
    clip-path: polygon(0 0, 100% 5%, 95% 100%, 5% 95%);
  }

  .page-about .origin-copy {
    padding-left: 32px;
  }

  .page-about .timeline {
    padding-top: 20px;
  }

  .page-about .timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .timeline-item {
    width: calc(50% - 56px);
    padding: 0 0 64px;
  }

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

  .page-about .timeline-item:nth-child(odd) {
    margin-right: auto;
    text-align: right;
  }

  .page-about .timeline-item:nth-child(even) {
    margin-left: auto;
    text-align: left;
  }

  .page-about .timeline-item::before {
    left: auto;
    right: -63px;
    top: 14px;
    width: 14px;
    height: 14px;
    border: 2px solid var(--bg-dark);
  }

  .page-about .timeline-item:nth-child(even)::before {
    right: auto;
    left: -63px;
  }

  .page-about .timeline-item:nth-child(odd) .timeline-card {
    border-radius: 8px 0 0 8px;
  }

  .page-about .timeline-item:nth-child(odd) .timeline-card::before {
    left: auto;
    right: -1px;
  }

  .page-about .timeline-item:nth-child(2)::before {
    background: var(--accent-green);
    box-shadow: 0 0 0 2px rgba(15, 255, 80, 0.7);
  }

  .page-about .tech-media {
    aspect-ratio: 4 / 3;
  }

  .page-about .culture-media {
    aspect-ratio: 4 / 3;
  }

  .page-about .cta-zone {
    padding: 96px 0;
  }
}