.page-about {
  --about-rail-w: 200px;
  --about-gap: clamp(24px, 4vw, 68px);
  --about-torn-h: 12px;
  --about-hair: rgba(61, 245, 208, .2);
  --about-hair-soft: rgba(61, 245, 208, .12);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: clamp(76px, 11vw, 112px) clamp(16px, 3vw, 32px) 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(24px, 4vw, 44px) clamp(48px, 7vw, 88px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  align-items: center;
}

.page-about .about-hero-copy h1 {
  margin: 12px 0 20px;
  font-size: clamp(40px, 7.6vw, 92px);
  line-height: .94;
  letter-spacing: -.022em;
}

.page-about .about-hero-copy h1 .is-thin,
.page-about .about-hero-copy h1 .is-strong {
  display: block;
}

.page-about .about-hero-copy h1 .is-thin {
  font-weight: 200;
  color: var(--pearl);
}

.page-about .about-hero-copy h1 .is-strong {
  font-weight: 900;
  background: linear-gradient(96deg, var(--pearl) 0%, var(--pearl) 42%, var(--cyan) 78%, var(--cyan-dark) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

@supports not (background-clip: text) {
  .page-about .about-hero-copy h1 .is-strong {
    color: var(--cyan);
    background: none;
  }
}

.page-about .about-lede {
  max-width: 34em;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: rgba(244, 247, 245, .82);
}

.page-about .about-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero-media {
  position: relative;
  margin: 0;
  aspect-ratio: 14 / 10;
  overflow: hidden;
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(8, 24, 43, .05) 0%, rgba(8, 24, 43, .58) 100%);
  pointer-events: none;
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: end;
    gap: var(--about-gap);
  }

  .page-about .about-hero-media {
    aspect-ratio: 14 / 11;
    margin-bottom: 18px;
  }
}

/* ---------- 章节基座 ---------- */
.page-about .about-section {
  position: relative;
  padding-block: clamp(48px, 7vw, 96px);
}

.page-about .about-block {
  display: grid;
  gap: 20px;
}

@media (min-width: 900px) {
  .page-about .about-block {
    grid-template-columns: minmax(120px, var(--about-rail-w)) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }
}

.page-about .about-rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-rail .index-num {
  font-size: 26px;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -.01em;
}

.page-about .about-rail .eyebrow {
  margin: 0;
  color: var(--slate);
}

@media (min-width: 900px) {
  .page-about .about-rail {
    position: sticky;
    top: 104px;
    display: block;
    padding-bottom: 0;
    border-bottom: 0;
    border-left: 1px solid var(--about-hair);
    padding-left: 18px;
  }

  .page-about .about-rail .index-num {
    display: block;
    font-size: 46px;
    margin-bottom: 14px;
    background: var(--data-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  @supports not (background-clip: text) {
    .page-about .about-rail .index-num {
      color: var(--cyan);
      background: none;
    }
  }

  .page-about .about-rail .eyebrow {
    line-height: 1.7;
  }
}

.page-about .about-body h2 {
  margin: 0 0 20px;
  max-width: 20em;
  font-size: clamp(26px, 3.6vw, 44px);
  line-height: 1.16;
  letter-spacing: -.012em;
  color: var(--pearl);
}

.page-about .about-body .prose p + p {
  margin-top: 18px;
}

.page-about .about-body .prose p {
  color: rgba(244, 247, 245, .78);
}

.page-about .about-inline-link {
  margin-top: 24px;
  font-size: 15px;
  color: var(--slate);
}

.page-about .about-inline-link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 245, 208, .4);
  padding-bottom: 1px;
}

.page-about .about-inline-link a:hover,
.page-about .about-inline-link a:focus-visible {
  color: var(--coral);
  border-bottom-color: var(--coral);
  outline: none;
}

/* ---------- 数字数据条 ---------- */
.page-about .about-facts {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-facts li {
  background: var(--sky-panel);
  padding: 20px 18px 22px;
  display: grid;
  gap: 8px;
}

.page-about .stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--cyan);
}

@supports (background-clip: text) {
  .page-about .about-facts .stat-value,
  .page-about .about-metrics .stat-value {
    background: var(--data-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

.page-about .stat-label {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

@media (min-width: 660px) {
  .page-about .about-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1020px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 档案路径 ---------- */
.page-about .archive-paths {
  margin-top: 34px;
  display: grid;
  gap: 16px;
}

.page-about .archive-path {
  position: relative;
  padding: 24px 22px 26px;
  background: var(--sky-panel);
  border: 1px solid var(--about-hair-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color .3s ease, transform .3s ease;
}

.page-about .archive-path::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: var(--data-grad);
  opacity: .8;
}

.page-about .archive-path:hover,
.page-about .archive-path:focus-within {
  border-color: var(--about-hair);
  transform: translateY(-4px);
}

.page-about .archive-path .tag {
  margin-bottom: 14px;
}

.page-about .archive-path h3 {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 700;
  color: var(--pearl);
}

.page-about .archive-path p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(244, 247, 245, .72);
}

@media (min-width: 760px) {
  .page-about .archive-paths {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 拼贴带 ---------- */
.page-about .about-collage {
  padding-block: clamp(36px, 5vw, 64px);
}

.page-about .about-collage .eyebrow {
  margin: 0 0 8px;
  color: var(--coral);
}

.page-about .collage-title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 27px);
  font-weight: 700;
  color: var(--pearl);
}

.page-about .collage-track {
  display: flex;
  gap: 20px;
  margin-top: 28px;
  padding: 18px clamp(16px, 3vw, 32px) 34px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--cyan-dark) rgba(122, 143, 166, .16);
}

.page-about .collage-track:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -4px;
}

.page-about .collage-track::-webkit-scrollbar {
  height: 6px;
}

.page-about .collage-track::-webkit-scrollbar-thumb {
  background: var(--cyan-dark);
  border-radius: var(--r-pill);
}

.page-about .collage-card {
  position: relative;
  flex: 0 0 min(74vw, 288px);
  scroll-snap-align: start;
  padding: 22px 20px 30px;
  border: 1px solid var(--about-hair-soft);
  border-radius: var(--r-md);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(61, 245, 208, .14) 0%, transparent 62%),
    linear-gradient(155deg, #10263C 0%, #0A1B2D 100%);
  transition: transform .3s ease, border-color .3s ease;
}

.page-about .collage-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--about-torn-h);
  background: var(--sky-deep);
  -webkit-mask-image: radial-gradient(circle at 6px 0, transparent 5.5px, #000 6px);
  mask-image: radial-gradient(circle at 6px 0, transparent 5.5px, #000 6px);
  -webkit-mask-size: 12px 12px;
  mask-size: 12px 12px;
  -webkit-mask-repeat: repeat-x;
  mask-repeat: repeat-x;
  pointer-events: none;
}

.page-about .collage-card:hover {
  transform: translateY(-6px);
  border-color: var(--about-hair);
}

.page-about .collage-card .tag {
  margin-bottom: 14px;
}

.page-about .collage-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--pearl);
}

.page-about .collage-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(244, 247, 245, .7);
}

@media (min-width: 900px) {
  .page-about .collage-card {
    flex-basis: 320px;
  }

  .page-about .collage-card:nth-child(even) {
    transform: translateY(22px);
  }

  .page-about .collage-card:nth-child(even):hover {
    transform: translateY(16px);
  }
}

/* ---------- 制作流程配图 ---------- */
.page-about .about-workbench {
  margin: clamp(32px, 5vw, 56px) 0 0;
}

.page-about .about-workbench img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 团队条形图 ---------- */
.page-about .team-bars {
  margin-top: 36px;
  display: grid;
  gap: 20px;
}

.page-about .bar-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 8px 14px;
}

.page-about .bar-label {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--pearl);
}

.page-about .bar-value {
  font-size: 13px;
  color: var(--slate);
  letter-spacing: .02em;
}

.page-about .bar-track {
  grid-column: 1 / -1;
  display: block;
  height: 14px;
  border-radius: var(--r-pill);
  background: rgba(122, 143, 166, .14);
  border: 1px solid rgba(61, 245, 208, .14);
  overflow: hidden;
}

.page-about .bar-fill {
  display: block;
  height: 100%;
  width: var(--w, 0%);
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--c1, var(--cyan)) 0%, var(--c2, var(--cyan-dark)) 100%);
}

.page-about .bar-row--data {
  --w: 28.3%;
  --c1: #3DF5D0;
  --c2: #29D6BD;
}

.page-about .bar-row--content {
  --w: 21.7%;
  --c1: #2FDCC0;
  --c2: #1FB79B;
}

.page-about .bar-row--product {
  --w: 15%;
  --c1: #45C9A6;
  --c2: #7CA98E;
}

.page-about .bar-row--support {
  --w: 35%;
  --c1: #A9A98C;
  --c2: #FF6B4A;
}

.page-about .about-metrics {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-metrics li {
  display: grid;
  gap: 6px;
  padding-left: 16px;
  border-left: 2px solid var(--about-hair);
}

.page-about .about-metrics .stat-value {
  font-size: clamp(24px, 3vw, 32px);
}

@media (min-width: 700px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }
}

/* ---------- 阶段历程 ---------- */
.page-about .about-section--timeline {
  overflow: hidden;
}

.page-about .about-timeline-texture {
  position: absolute;
  inset: 0 0 0 auto;
  width: min(46%, 520px);
  margin: 0;
  opacity: .17;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-timeline-texture img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  mix-blend-mode: screen;
  -webkit-mask-image: linear-gradient(200deg, rgba(0, 0, 0, .9) 0%, transparent 82%);
  mask-image: linear-gradient(200deg, rgba(0, 0, 0, .9) 0%, transparent 82%);
}

.page-about .about-section--timeline .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 34px 0 0;
  padding: 0 0 0 30px;
  display: grid;
  gap: 34px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(61, 245, 208, .18) 58%, var(--coral) 100%);
}

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

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--sky-deep);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(61, 245, 208, .12);
}

.page-about .about-timeline-item:last-child::before {
  border-color: var(--coral);
  box-shadow: 0 0 0 4px rgba(255, 107, 74, .16);
}

.page-about .about-timeline-item .timeline-step {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-about .about-timeline-item:last-child .timeline-step {
  color: var(--coral);
}

.page-about .about-timeline-item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--pearl);
}

.page-about .about-timeline-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(244, 247, 245, .7);
}

@media (min-width: 940px) {
  .page-about .about-timeline {
    grid-auto-flow: column;
    grid-auto-columns: minmax(0, 1fr);
    gap: 26px;
    padding: 52px 0 0;
  }

  .page-about .about-timeline::before {
    left: 0;
    right: 0;
    top: 8px;
    bottom: auto;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan) 0%, rgba(61, 245, 208, .18) 56%, var(--coral) 100%);
  }

  .page-about .about-timeline-item::before {
    left: 0;
    top: -50px;
  }
}

/* ---------- 合作生态 ---------- */
.page-about .partner-tags {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .partner-tag a {
  display: block;
  padding: 18px 20px;
  border: 1px solid var(--about-hair-soft);
  border-radius: var(--r-md);
  background: var(--sky-panel);
  text-decoration: none;
  transition: border-color .28s ease, transform .28s ease, background-color .28s ease;
}

.page-about .partner-tag a:hover,
.page-about .partner-tag a:focus-visible {
  border-color: var(--about-hair);
  background: rgba(15, 36, 56, .95);
  transform: translateY(-3px);
  outline: none;
}

.page-about .partner-tag a:focus-visible {
  box-shadow: 0 0 0 2px var(--cyan);
}

.page-about .partner-detail {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin-top: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(244, 247, 245, .72);
  transition: max-height .26s ease, opacity .26s ease, margin-top .26s ease;
}

.page-about .partner-tag a:hover .partner-detail,
.page-about .partner-tag a:focus-visible .partner-detail {
  max-height: 8em;
  opacity: 1;
  margin-top: 12px;
}

@media (min-width: 760px) {
  .page-about .partner-tags {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-honor {
  margin-top: 30px;
  padding: 22px 24px;
  border-left: 2px solid var(--coral);
  background: rgba(255, 107, 74, .06);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.page-about .about-honor .tag {
  margin-bottom: 12px;
}

.page-about .about-honor p {
  margin: 0;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.76;
  color: rgba(244, 247, 245, .78);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta {
  padding-block: clamp(48px, 7vw, 92px);
  border-top: 1px solid var(--about-hair-soft);
}

.page-about .about-cta-inner {
  display: grid;
  gap: 30px;
  padding: clamp(28px, 4vw, 48px);
  border: 1px solid var(--about-hair);
  border-radius: var(--r-lg);
  background:
    radial-gradient(120% 130% at 100% 0%, rgba(61, 245, 208, .13) 0%, transparent 58%),
    linear-gradient(140deg, #0E2235 0%, #08182B 100%);
}

.page-about .about-cta .eyebrow {
  margin: 0 0 12px;
  color: var(--coral);
}

.page-about .about-cta h2 {
  margin: 0 0 14px;
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1.18;
  color: var(--pearl);
}

.page-about .about-cta-lede {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 247, 245, .74);
}

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

@media (min-width: 880px) {
  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 48px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .archive-path,
  .page-about .collage-card,
  .page-about .partner-tag a {
    transition: none;
  }

  .page-about .archive-path:hover,
  .page-about .collage-card:hover,
  .page-about .partner-tag a:hover {
    transform: none;
  }

  .page-about .partner-detail {
    transition: none;
  }
}