.page-about {
  --about-hero-glow: rgba(57, 255, 20, 0.12);
  --about-card-border: rgba(255, 255, 255, 0.08);
  --about-text-secondary: rgba(255, 255, 255, 0.78);
  --about-line: rgba(57, 255, 20, 0.35);
  --about-grid-size: 36px;
}

.page-about .container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 64px 0 48px;
  background: linear-gradient(135deg, var(--space-blue) 0%, #0A1631 55%, var(--deep-teal) 130%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: var(--about-grid-size) var(--about-grid-size);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 20px;
  top: 32px;
  bottom: 32px;
  width: 4px;
  background: repeating-linear-gradient(
    to bottom,
    var(--signal-orange) 0px,
    var(--signal-orange) 2px,
    transparent 2px,
    transparent 9px
  );
  opacity: 0.35;
  pointer-events: none;
}

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

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}

.page-about .breadcrumb a {
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-about .breadcrumb a:hover {
  color: var(--electric-green);
}

.page-about .breadcrumb .breadcrumb-sep {
  color: rgba(255, 255, 255, 0.35);
}

.page-about .breadcrumb span[aria-current="page"] {
  color: var(--electric-green);
  font-weight: 600;
}

.page-about .about-hero-kicker {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal-orange);
  margin-bottom: 12px;
}

.page-about .about-hero h1 {
  font-family: var(--font-headline);
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.12;
  color: var(--white);
  margin: 0 0 16px;
}

.page-about .about-hero-lead {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  max-width: 620px;
  margin: 0 0 36px;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
}

.page-about .about-hero-stat {
  background: var(--glass-white);
  border-left: 2px solid var(--electric-green);
  padding: 16px 18px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.page-about .about-hero-stat dt {
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 6px;
}

.page-about .about-hero-stat dd {
  font-family: var(--font-headline);
  font-size: 1.7rem;
  font-weight: 900;
  color: var(--white);
  margin: 0;
  line-height: 1;
}

.page-about .about-hero-stat dd sup {
  font-size: 0.78rem;
  color: var(--electric-green);
  margin-left: 2px;
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  padding-top: 56px;
  padding-bottom: 80px;
}

.page-about .about-main {
  min-width: 0;
}

.page-about .about-section {
  padding: 32px 0 56px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.page-about .about-section:first-of-type {
  border-top: none;
  padding-top: 0;
}

.page-about .about-section-head {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 30px;
}

.page-about .about-section-num {
  font-family: var(--font-headline);
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--electric-green);
  opacity: 0.82;
  transform: scale(0.9);
  transform-origin: left center;
  transition: transform 0.7s var(--ease-out), opacity 0.7s var(--ease-out);
}

.page-about .about-section[data-reveal].is-revealed .about-section-num {
  transform: scale(1);
  opacity: 1;
}

.page-about .about-section-title-wrap {
  padding-top: 4px;
}

.page-about .about-section-title-wrap h2 {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  margin: 0 0 6px;
  position: relative;
}

.page-about .about-section-title-wrap h2::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 3px;
  background: var(--signal-orange);
  vertical-align: middle;
  margin-right: 10px;
}

.page-about .about-section-sub {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
  margin: 0;
  letter-spacing: 0.06em;
}

/* 01 品牌故事 */
.page-about .about-story-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-story-copy p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--about-text-secondary);
  margin: 0 0 16px;
}

.page-about .about-quote {
  margin: 24px 0 0;
  padding: 18px 22px;
  background: rgba(255, 107, 0, 0.08);
  border-left: 3px solid var(--signal-orange);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-about .about-quote p {
  font-family: var(--font-headline);
  font-size: 1.02rem;
  font-style: italic;
  color: rgba(255, 255, 255, 0.9);
  margin: 0 0 8px;
}

.page-about .about-quote footer {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.55);
}

.page-about .about-story-figure {
  margin: 0;
  position: relative;
}

.page-about .about-story-img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-story-figure figcaption,
.page-about .about-team-figure figcaption,
.page-about .about-badge-figure figcaption {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.48);
  margin-top: 10px;
  letter-spacing: 0.04em;
}

/* 02 时间轴 */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(to bottom, var(--electric-green), var(--deep-teal));
  opacity: 0.4;
}

.page-about .tm-item {
  position: relative;
  padding-left: 56px;
  margin-bottom: 28px;
}

.page-about .tm-item:last-child {
  margin-bottom: 0;
}

.page-about .tm-mark {
  position: absolute;
  left: 0;
  top: 2px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .tm-mark svg {
  transition: transform 0.4s var(--ease-out);
}

.page-about .tm-item:hover .tm-mark svg {
  transform: scale(1.14);
}

.page-about .tm-card {
  background: var(--glass-white);
  border: 1px solid var(--about-card-border);
  border-left: 3px solid rgba(57, 255, 20, 0.55);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.page-about .tm-item:hover .tm-card {
  background: rgba(255, 255, 255, 0.12);
  border-left-color: var(--electric-green);
}

.page-about .tm-year {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--signal-orange);
  background: rgba(255, 107, 0, 0.12);
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.page-about .tm-card h3 {
  font-family: var(--font-headline);
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--white);
  margin: 0 0 8px;
}

.page-about .tm-card p {
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.72);
  margin: 0;
}

/* 03 团队 */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-team-content p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--about-text-secondary);
  margin: 0 0 16px;
}

.page-about .about-team-desc {
  margin-top: 20px;
}

.page-about .about-team-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 22px 0;
}

.page-about .about-metric-item {
  background: var(--glass-white);
  border: 1px solid var(--about-card-border);
  border-bottom: 2px solid var(--electric-green);
  border-radius: var(--radius);
  padding: 14px 10px;
  text-align: center;
}

.page-about .about-metric-value {
  display: block;
  font-family: var(--font-headline);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--white);
  line-height: 1;
}

.page-about .about-metric-value em {
  font-style: normal;
  font-size: 0.82rem;
  color: var(--electric-green);
  margin-left: 2px;
}

.page-about .about-metric-label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 6px;
}

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

.page-about .about-team-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
}

/* 04 资质 */
.page-about .about-credential-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-credential-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-credential-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .about-credential-list li:first-child {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .about-credential-list svg {
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
}

.page-about .about-credential-list span {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--white);
  line-height: 1.4;
}

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

.page-about .about-badge-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
}

/* 05 合作 */
.page-about .about-eco-content > p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--about-text-secondary);
  margin: 0 0 16px;
}

.page-about .about-scene-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 28px 0;
}

.page-about .about-scene-card {
  background: var(--glass-white);
  border: 1px solid var(--about-card-border);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.page-about .about-scene-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, transparent 45%, rgba(255, 107, 0, 0.35) 45%);
}

.page-about .about-scene-card:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(57, 255, 20, 0.4);
}

.page-about .about-scene-num {
  display: block;
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--electric-green);
  margin-bottom: 10px;
}

.page-about .about-scene-card h3 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--white);
  margin: 0 0 8px;
}

.page-about .about-scene-card p {
  font-size: 0.86rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.68);
  margin: 0;
}

.page-about .about-eco-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.page-about .about-eco-links .btn,
.page-about .about-sidebar-cta .btn {
  display: inline-block;
  padding: 12px 22px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--space-blue);
  background: var(--electric-green);
  border: 2px solid var(--electric-green);
  border-radius: var(--radius);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  text-decoration: none;
  transition: background 0.3s ease, color 0.3s ease;
}

.page-about .about-eco-links .btn:hover,
.page-about .about-sidebar-cta .btn:hover {
  background: var(--white);
  color: var(--space-blue);
}

.page-about .about-eco-links .btn-secondary,
.page-about .about-sidebar-cta .btn-secondary {
  display: inline-block;
  padding: 12px 22px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--signal-orange);
  background: transparent;
  border: 2px solid var(--signal-orange);
  border-radius: var(--radius);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  text-decoration: none;
  transition: background 0.3s ease, color 0.3s ease;
}

.page-about .about-eco-links .btn-secondary:hover,
.page-about .about-sidebar-cta .btn-secondary:hover {
  background: var(--signal-orange);
  color: var(--space-blue);
}

/* 侧边栏 */
.page-about .about-sidebar {
  min-width: 0;
}

.page-about .about-sidebar-inner {
  background: var(--glass-white);
  border: 1px solid var(--about-card-border);
  border-top: 3px solid var(--electric-green);
  border-radius: var(--radius);
  padding: 24px 20px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: sticky;
  top: 100px;
}

.page-about .about-sidebar-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--signal-orange);
  margin: 0 0 16px;
}

.page-about .about-index {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 20px;
}

.page-about .about-index a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 8px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  transition: background 0.3s ease, color 0.3s ease;
}

.page-about .about-index a span {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 0.82rem;
  color: var(--electric-green);
  opacity: 0.75;
}

.page-about .about-index a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
}

.page-about .about-index a:hover span {
  opacity: 1;
}

.page-about .about-sidebar-cta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 18px;
}

.page-about .about-sidebar-cta .btn,
.page-about .about-sidebar-cta .btn-secondary {
  text-align: center;
  width: 100%;
}

.page-about .about-sidebar-note {
  font-size: 0.76rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.45);
  margin: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding-top: 14px;
}

/* 媒体查询：平板 */
@media (min-width: 640px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-scene-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-metric-item {
    padding: 18px 12px;
  }
}

/* 媒体查询：桌面 */
@media (min-width: 1024px) {
  .page-about .container {
    padding-left: 32px;
    padding-right: 32px;
  }

  .page-about .about-hero {
    padding: 88px 0 64px;
  }

  .page-about .about-hero::after {
    right: 48px;
  }

  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 64px;
    align-items: start;
    padding-top: 80px;
  }

  .page-about .about-section {
    padding: 48px 0 72px;
  }

  .page-about .about-section-head {
    gap: 28px;
    margin-bottom: 40px;
  }

  .page-about .about-section-num {
    font-size: 4.5rem;
  }

  .page-about .about-section-title-wrap h2 {
    font-size: 1.8rem;
  }

  .page-about .about-story-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .about-story-copy p {
    font-size: 1rem;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .about-credential-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .about-scene-grid {
    gap: 20px;
    margin: 32px 0;
  }

  .page-about .about-sidebar-inner {
    padding: 28px 22px;
  }
}

/* 媒体查询：大屏 */
@media (min-width: 1280px) {
  .page-about .container {
    padding-left: 0;
    padding-right: 0;
  }

  .page-about .about-layout {
    gap: 80px;
  }
}

/* reduced-motion 兼容 */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-section-num,
  .page-about .tm-mark svg,
  .page-about .about-scene-card {
    transition: none;
    transform: none;
  }

  .page-about .about-section[data-reveal] .about-section-num {
    transform: none;
    opacity: 1;
  }
}

/* 图片响应式约束 */
.page-about img {
  max-width: 100%;
  height: auto;
}