.page-about {
  --about-diag: polygon(0 5%, 100% 0, 100% 95%, 0 100%);
  --about-radius: var(--radius);
  overflow-x: hidden;
  overflow-wrap: break-word;
  background: var(--moss-deep);
}

/* 面包屑 */
.page-about .about-crumb {
  background: var(--moss-deep);
  padding: 18px 0 2px;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: rgba(234, 251, 243, 0.62);
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 6px;
  color: rgba(198, 255, 61, 0.45);
}

.page-about .breadcrumb__item a {
  color: var(--mint);
  text-decoration: none;
}

.page-about .breadcrumb__item a:hover {
  text-decoration: underline;
}

/* 分区基础 */
.page-about .about-band {
  position: relative;
  padding: 44px 0 52px;
}

.page-about .about-band--hero {
  padding-top: 26px;
  padding-bottom: 64px;
  background:
    radial-gradient(90% 70% at 94% 2%, rgba(45, 156, 255, 0.24), transparent 62%),
    radial-gradient(70% 60% at 2% 98%, rgba(255, 92, 57, 0.16), transparent 62%),
    linear-gradient(172deg, var(--moss) 0%, var(--moss-deep) 100%);
  color: var(--card);
}

.page-about .about-band--hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(198, 255, 61, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(198, 255, 61, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}

.page-about .about-band--ink {
  background: linear-gradient(180deg, var(--moss-deep) 0%, #041a12 100%);
  color: var(--card);
}

.page-about .about-band--paper {
  background: var(--paper);
  color: var(--ink-soft);
}

.page-about .about-band--timeline {
  background:
    radial-gradient(80% 60% at 6% 0%, rgba(45, 156, 255, 0.18), transparent 60%),
    var(--moss-deep);
  color: var(--card);
}

.page-about .about-band--road {
  background: var(--paper);
  color: var(--ink-soft);
}

.page-about .about-band--next {
  background:
    radial-gradient(70% 60% at 96% 100%, rgba(198, 255, 61, 0.16), transparent 60%),
    var(--moss);
  color: var(--card);
}

/* 标题体系 */
.page-about .about-kicker {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-band--paper .about-kicker,
.page-about .about-band--road .about-kicker {
  color: #2f7a5f;
}

.page-about .about-h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--card);
  transform: skewX(-4deg);
  transform-origin: left bottom;
}

.page-about .about-h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 5.4vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.015em;
}

.page-about .about-h2--tight {
  margin-bottom: 0;
}

.page-about .about-lead {
  margin: 0 0 26px;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.8;
  color: rgba(234, 251, 243, 0.86);
}

.page-about .about-head {
  max-width: 44em;
  margin-bottom: 30px;
}

.page-about .about-head__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(234, 251, 243, 0.76);
}

.page-about .about-band--paper .about-head__lead,
.page-about .about-band--road .about-head__lead {
  color: var(--ink-mute);
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  gap: 30px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  max-width: 540px;
  margin-bottom: 26px;
}

.page-about .about-hero .datacard {
  padding: 16px 18px;
  border: 1px solid rgba(198, 255, 61, 0.24);
  border-radius: var(--radius-sm);
  background: rgba(6, 35, 26, 0.62);
}

.page-about .about-hero .datacard__value {
  font-family: var(--font-data);
  font-size: clamp(26px, 6.2vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .about-hero .datacard--blue .datacard__value {
  color: var(--blue);
}

.page-about .about-hero .datacard__label {
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(234, 251, 243, 0.78);
}

.page-about .about-hero .datacard__meta {
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  color: rgba(234, 251, 243, 0.5);
}

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

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  clip-path: var(--about-diag);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: rgba(6, 35, 26, 0.8);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.1) brightness(0.9);
}

.page-about .about-hero__figure .media__caption {
  position: absolute;
  left: 16px;
  bottom: 14px;
  right: 16px;
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(234, 251, 243, 0.82);
}

/* 玻璃引言 */
.page-about .about-quote {
  position: relative;
  margin-top: 42px;
  padding: 26px 22px;
  border-radius: var(--radius);
  border: 1px solid rgba(198, 255, 61, 0.26);
  background: rgba(234, 251, 243, 0.06);
  overflow: hidden;
}

.page-about .about-quote::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(198, 255, 61, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(198, 255, 61, 0.08) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.page-about .about-quote__text {
  position: relative;
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(234, 251, 243, 0.9);
}

.page-about .about-quote__meta {
  position: relative;
  margin: 14px 0 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lime);
}

/* 数据生产方式 */
.page-about .about-data {
  display: grid;
  gap: 26px;
}

.page-about .about-data__figure {
  margin: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
}

.page-about .about-data__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.05) brightness(0.86);
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  border-left: 3px solid var(--lime);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(234, 251, 243, 0.05);
}

.page-about .about-step__no {
  font-family: var(--font-data);
  font-size: 22px;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-step h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--card);
}

.page-about .about-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(234, 251, 243, 0.76);
}

.page-about .about-dims {
  margin-top: 30px;
}

.page-about .about-dims__title {
  margin: 0 0 14px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: rgba(234, 251, 243, 0.66);
}

.page-about .about-dims__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* 团队与伙伴 */
.page-about .about-team {
  display: grid;
  gap: 26px;
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-roles li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink-mute);
}

.page-about .about-roles li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  background: var(--lime);
  border-radius: 2px;
  transform: rotate(45deg);
}

.page-about .about-roles strong {
  color: var(--ink-soft);
  font-weight: 700;
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  clip-path: polygon(0 6%, 100% 0, 100% 94%, 0 100%);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(0.78) contrast(1.06);
}

.page-about .about-partners {
  display: grid;
  gap: 16px;
  margin-top: 34px;
}

.page-about .about-partner {
  padding: 22px;
  border-radius: var(--radius);
  background: var(--card);
  border-left: 4px solid var(--blue);
}

.page-about .about-partner--offset {
  border-left-color: var(--gold);
}

.page-about .about-partner__num {
  margin: 0;
  font-family: var(--font-data);
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  color: var(--moss);
}

.page-about .about-partner__num small {
  margin-left: 6px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-mute);
}

.page-about .about-partner p:last-child {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-mute);
}

/* 里程碑 */
.page-about .filterbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.page-about .filterbar__btn {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(198, 255, 61, 0.3);
  background: rgba(234, 251, 243, 0.05);
  color: var(--card);
  font-family: var(--font-body);
  font-size: 14px;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .filterbar__btn:hover,
.page-about .filterbar__btn[aria-pressed="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--moss-deep);
}

.page-about .filterbar__btn:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
  display: grid;
  gap: 18px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime) 0%, rgba(198, 255, 61, 0.14) 100%);
}

.page-about .about-node {
  position: relative;
  padding: 18px 18px 16px;
  border-radius: var(--radius);
  border: 1px solid rgba(198, 255, 61, 0.18);
  background: rgba(234, 251, 243, 0.05);
}

.page-about .about-node__dot {
  position: absolute;
  left: -28px;
  top: 24px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 255, 61, 0.18);
}

.page-about .about-node__stage {
  display: inline-block;
  margin: 0 0 8px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.08em;
  background: rgba(198, 255, 61, 0.14);
  color: var(--lime);
}

.page-about .about-node .tag {
  margin: 0 0 8px 8px;
}

.page-about .about-node__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.42;
  color: var(--card);
}

.page-about .about-node__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(234, 251, 243, 0.76);
}

.page-about .about-node__more {
  margin-top: 10px;
  font-size: 14px;
}

.page-about .about-node__more summary {
  cursor: pointer;
  list-style: none;
  color: var(--blue);
}

.page-about .about-node__more summary::-webkit-details-marker {
  display: none;
}

.page-about .about-node__more summary::before {
  content: "+ ";
  color: var(--lime);
  font-family: var(--font-data);
}

.page-about .about-node__more[open] summary::before {
  content: "− ";
}

.page-about .about-node__more summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .about-node__more p {
  margin: 8px 0 0;
  line-height: 1.78;
  color: rgba(234, 251, 243, 0.68);
}

/* 路线 */
.page-about .about-road {
  display: grid;
  gap: 18px;
}

.page-about .about-road__item {
  padding: 22px 20px;
  border-radius: var(--radius);
  background: var(--card);
  border-top: 4px solid var(--lime);
  border-left: 1px solid rgba(11, 61, 46, 0.08);
  border-right: 1px solid rgba(11, 61, 46, 0.08);
  border-bottom: 1px solid rgba(11, 61, 46, 0.08);
}

.page-about .about-road__item:nth-child(2) {
  border-top-color: var(--blue);
}

.page-about .about-road__item:nth-child(3) {
  border-top-color: var(--orange);
}

.page-about .about-road__no {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--moss);
}

.page-about .about-road__item h3 {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  color: var(--ink-soft);
}

.page-about .about-road__item p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-mute);
}

/* 页面内链 */
.page-about .about-links {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-link {
  display: block;
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid rgba(198, 255, 61, 0.24);
  background: rgba(234, 251, 243, 0.06);
  color: var(--card);
  text-decoration: none;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  transform: translateY(-3px);
  border-color: var(--lime);
  background: rgba(234, 251, 243, 0.1);
}

.page-about .about-link__label {
  display: block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .about-link__title {
  display: block;
  margin: 8px 0 6px;
  font-size: 19px;
  font-weight: 700;
}

.page-about .about-link__desc {
  display: block;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(234, 251, 243, 0.74);
}

.page-about .about-link__go {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--blue);
}

/* 平板与桌面 */
@media (min-width: 768px) {
  .page-about .about-band {
    padding: 60px 0 68px;
  }

  .page-about .about-band--hero {
    padding-top: 34px;
    padding-bottom: 82px;
  }

  .page-about .about-quote {
    padding: 32px 34px;
    margin-top: 52px;
  }

  .page-about .about-quote__text {
    font-size: 18px;
    max-width: 40em;
  }

  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-partner--offset {
    transform: translateY(18px);
  }

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

  .page-about .about-road__item:nth-child(2) {
    transform: translateY(24px);
  }

  .page-about .about-road__item:nth-child(3) {
    transform: translateY(48px);
  }

  .page-about .about-band--road {
    padding-bottom: 128px;
  }

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

@media (min-width: 1024px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    gap: 46px;
    align-items: center;
  }

  .page-about .about-hero__text {
    padding-bottom: 12px;
  }

  .page-about .about-data {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 42px;
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: 42px;
    align-items: center;
  }

  .page-about .about-timeline {
    padding-left: 34px;
  }

  .page-about .about-node__dot {
    left: -34px;
  }

  .page-about .about-node {
    padding: 22px 24px 20px;
  }

  .page-about .about-timeline::before {
    left: 9px;
  }

  .page-about .about-node__dot {
    left: -34px;
    width: 18px;
    height: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
    animation: none !important;
  }

  .page-about .about-link:hover {
    transform: none;
  }
}