.page-about {
  --about-track-x: 9px;
  --about-card-bg: var(--ink-800);
  background: var(--ink-950);
  color: var(--cream-050);
}

.page-about .eyebrow {
  color: var(--orange-500);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  margin: 0 0 8px;
}

.page-about .section--cream .eyebrow {
  color: var(--orange-600);
}

.page-about .section h2 {
  font-size: clamp(1.5rem, 5.4vw, 2.3rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}

.page-about .section--cream {
  color: var(--text-900);
  background: var(--cream-050);
}

.page-about .section--cream h2 {
  color: var(--text-900);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 26px 0 0;
  overflow: hidden;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 26px;
}

.page-about .about-hero .breadcrumb__link,
.page-about .about-hero .breadcrumb__item,
.page-about .about-hero .breadcrumb__sep {
  color: var(--warm-gray-500);
  font-size: 0.8rem;
}

.page-about .about-hero .breadcrumb__link:hover {
  color: var(--orange-500);
}

.page-about .about-hero__title {
  font-size: clamp(2rem, 8.4vw, 3.5rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  max-width: 18ch;
}

.page-about .about-hero__lede {
  color: var(--paper-200);
  font-size: 1rem;
  line-height: 1.85;
  max-width: 40ch;
  margin: 0 0 26px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}

.page-about .about-hero__media {
  margin: 0;
  padding: 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  clip-path: polygon(0 7%, 100% 0, 100% 93%, 0 100%);
  filter: saturate(0.92) contrast(1.06);
}

.page-about .about-hero__media .media-frame__cap {
  display: block;
  margin: 10px 0 0;
  padding: 0 16px;
  color: var(--warm-gray-500);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
}

/* ---------- 关键数字带 ---------- */
.page-about .about-band {
  position: relative;
  padding: 44px 0 40px;
  background: var(--ink-800);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-band::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: repeating-linear-gradient(-8deg, var(--orange-500) 0 10px, transparent 10px 24px);
  opacity: 0.55;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 14px;
  border-left: 1px solid var(--line-strong);
}

.page-about .about-stat__value {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .about-stat .stat__num {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--orange-500);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__unit {
  font-size: 0.78rem;
  color: var(--paper-200);
}

.page-about .about-stat .stat__label {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--warm-gray-500);
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  padding-top: 48px;
  padding-bottom: 48px;
}

.page-about .about-index__head {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--warm-gray-500);
  margin: 0 0 20px;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .about-index__item {
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-index__item .index-follow__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 2px;
  color: var(--text-900);
  text-decoration: none;
  font-size: 0.98rem;
  transition: color 0.22s var(--ease), padding-left 0.22s var(--ease);
}

.page-about .about-index__item .index-follow__link:hover,
.page-about .about-index__item .index-follow__link[aria-current="true"] {
  color: var(--orange-600);
  padding-left: 8px;
}

.page-about .about-index__num {
  font-size: 0.76rem;
  color: var(--orange-600);
  letter-spacing: 0.08em;
}

/* ---------- 起点与今天 ---------- */
.page-about .about-overview__grid {
  gap: 36px;
  align-items: start;
}

.page-about .about-overview__text p {
  color: var(--paper-200);
  font-size: 1rem;
  line-height: 1.85;
  margin: 0 0 16px;
}

.page-about .about-overview__side {
  position: relative;
  padding: 26px 22px 26px 26px;
  background: var(--about-card-bg);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-about .about-overview__side::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--orange-500);
}

.page-about .about-side__title {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--warm-gray-500);
  margin: 0 0 16px;
}

.page-about .about-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-list--tight {
  margin-top: 8px;
}

.page-about .about-list li {
  position: relative;
  padding-left: 18px;
  color: var(--paper-200);
  font-size: 0.94rem;
  line-height: 1.7;
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--neon-400);
  clip-path: polygon(0 0, 68% 0, 100% 32%, 100% 100%, 32% 100%, 0 68%);
}

.page-about .section--cream .about-list li {
  color: rgba(20, 17, 14, 0.82);
}

.page-about .section--cream .about-list li::before {
  background: var(--blue-500);
}

/* ---------- 版本轨迹 ---------- */
.page-about .about-timeline__lede {
  color: var(--paper-200);
  font-size: 1rem;
  line-height: 1.85;
  max-width: 56ch;
  margin: 0 0 42px;
}

.page-about .about-track {
  position: relative;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: var(--about-track-x);
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange-500), var(--blue-500) 72%, rgba(46, 107, 255, 0));
}

.page-about .about-node {
  position: relative;
  padding-left: 44px;
  margin: 0 0 36px;
  scroll-margin-top: 96px;
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 18px;
  height: 18px;
  background: var(--orange-500);
  clip-path: polygon(0 0, 68% 0, 100% 32%, 100% 100%, 32% 100%, 0 68%);
}

.page-about .about-node__year {
  display: inline-block;
  color: var(--orange-500);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.page-about .about-node__year:hover {
  color: var(--cream-050);
}

.page-about .about-node__ver {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--neon-400);
  margin: 8px 0 6px;
}

.page-about .about-node__body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--cream-050);
}

.page-about .about-node__body p {
  margin: 0;
  color: var(--paper-200);
  font-size: 0.94rem;
  line-height: 1.8;
  max-width: 46ch;
}

/* ---------- 三块业务 ---------- */
.page-about .about-services__grid {
  gap: 26px;
  margin-bottom: 12px;
}

.page-about .about-service {
  padding-top: 20px;
  border-top: 2px solid var(--text-900);
}

.page-about .about-service__idx {
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--orange-600);
  margin: 0 0 10px;
}

.page-about .about-service h3 {
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--text-900);
}

.page-about .about-service p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(20, 17, 14, 0.78);
}

.page-about .about-flow {
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-flow__label {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--warm-gray-500);
  margin: 0 0 16px;
}

.page-about .about-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-flow__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 0.94rem;
  color: var(--text-900);
}

.page-about .about-flow__list .mono {
  min-width: 60px;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--orange-600);
}

/* ---------- 比分怎么来的 ---------- */
.page-about .about-data {
  position: relative;
  overflow: hidden;
  background: linear-gradient(140deg, var(--blue-800) 0%, var(--ink-950) 68%);
}

.page-about .about-data::after {
  content: "";
  position: absolute;
  right: -20%;
  bottom: -35%;
  width: 70%;
  height: 60%;
  background: radial-gradient(ellipse at center, rgba(46, 107, 255, 0.3), rgba(46, 107, 255, 0) 70%);
  pointer-events: none;
}

.page-about .about-data > .wrap {
  position: relative;
  z-index: 2;
}

.page-about .about-data__lede {
  color: var(--paper-200);
  font-size: 1rem;
  line-height: 1.85;
  max-width: 52ch;
  margin: 0 0 36px;
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .about-step {
  padding: 22px 20px 24px 24px;
  background: rgba(15, 13, 11, 0.55);
  border-left: 2px solid var(--blue-500);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-step__idx {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--neon-400);
  margin: 0 0 10px;
}

.page-about .about-step h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--cream-050);
}

.page-about .about-step p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--paper-200);
}

.page-about .about-data__note {
  margin: 32px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--orange-500);
  color: var(--paper-200);
  font-size: 0.94rem;
  line-height: 1.8;
  max-width: 60ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  gap: 36px;
  align-items: start;
}

.page-about .about-team__text p {
  color: var(--paper-200);
  font-size: 1rem;
  line-height: 1.85;
  margin: 0 0 18px;
}

.page-about .about-team__media {
  margin: 0;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 86%, 86% 100%, 0 100%);
}

.page-about .about-team__media .media-frame__cap {
  display: block;
  margin: 12px 0 0;
  color: var(--warm-gray-500);
  font-size: 0.74rem;
}

/* ---------- 覆盖与合作 ---------- */
.page-about .about-network__band {
  margin: 0 0 40px;
}

.page-about .about-network__band img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  clip-path: polygon(0 5%, 100% 0, 100% 95%, 0 100%);
}

.page-about .about-network__band .media-frame__cap {
  display: block;
  margin: 12px 0 0;
  color: var(--warm-gray-500);
  font-size: 0.74rem;
}

.page-about .about-network__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .about-network__map {
  margin: 0;
}

.page-about .about-map {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .about-map__grid line {
  stroke: var(--line);
  stroke-width: 1;
}

.page-about .about-map__links path {
  fill: none;
  stroke: rgba(46, 107, 255, 0.6);
  stroke-width: 1;
  stroke-dasharray: 3 5;
}

.page-about .about-pin circle {
  fill: var(--neon-400);
  transition: r 0.25s var(--ease);
}

.page-about .about-pin--hub circle {
  fill: var(--orange-500);
}

.page-about .about-pin text {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--cream-050);
  opacity: 0;
  transition: opacity 0.25s var(--ease);
}

.page-about .about-pin:hover circle {
  r: 7;
}

.page-about .about-pin:hover text,
.page-about .about-pin:focus-within text {
  opacity: 1;
}

.page-about .about-network__map .media-frame__cap {
  display: block;
  margin: 12px 0 0;
  color: var(--warm-gray-500);
  font-size: 0.74rem;
  line-height: 1.6;
}

.page-about .about-bars {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 12px;
  align-items: baseline;
}

.page-about .about-bar__label {
  font-size: 0.92rem;
  color: var(--paper-200);
}

.page-about .about-bar__num {
  font-size: 0.84rem;
  color: var(--orange-500);
}

.page-about .about-bar__track {
  grid-column: 1 / -1;
  position: relative;
  height: 6px;
  background: rgba(226, 215, 195, 0.12);
  overflow: hidden;
}

.page-about .about-bar__track span {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  background: linear-gradient(90deg, var(--blue-500), var(--neon-400));
}

.page-about .about-bar--wide .about-bar__track span {
  width: 100%;
}

.page-about .about-bar--mid .about-bar__track span {
  width: 44%;
}

.page-about .about-bar--small .about-bar__track span {
  width: 22%;
}

.page-about .about-network__note {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--warm-gray-500);
}

.page-about .about-coop {
  margin-top: 46px;
  padding: 28px 22px 28px 26px;
  background: var(--about-card-bg);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-about .about-coop__title {
  font-size: 1.14rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  color: var(--cream-050);
}

.page-about .about-coop__list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-coop__list li {
  display: flex;
  gap: 12px;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--paper-200);
}

.page-about .about-coop__list .mono {
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--orange-500);
}

/* ---------- 长期做法 ---------- */
.page-about .about-principles__grid {
  gap: 26px;
}

.page-about .about-principle {
  padding-top: 22px;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-principle__idx {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--orange-600);
  margin: 0 0 10px;
}

.page-about .about-principle h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--text-900);
}

.page-about .about-principle p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: rgba(20, 17, 14, 0.78);
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  background: var(--ink-800);
  border-top: 1px solid var(--line);
}

.page-about .about-cta__inner {
  max-width: 720px;
}

.page-about .about-cta h2 {
  font-size: clamp(1.4rem, 5.2vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  color: var(--cream-050);
}

.page-about .about-cta p {
  margin: 0 0 26px;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--paper-200);
}

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

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding-top: 34px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 28px 24px;
  }

  .page-about .about-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 32px;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-network__grid {
    grid-template-columns: 1.25fr 0.75fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .about-flow__list {
    flex-direction: row;
    gap: 0;
  }

  .page-about .about-flow__list li {
    flex: 1 1 0;
    padding: 0 22px;
    border-left: 1px solid var(--line-dark);
  }

  .page-about .about-flow__list li:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-about .about-coop {
    padding: 32px 34px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-track::before {
    left: 9px;
  }

  .page-about .about-node {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 26px;
    padding-left: 48px;
    margin-bottom: 42px;
  }

  .page-about .about-node::before {
    left: 1px;
    top: 6px;
  }

  .page-about .about-node__year {
    font-size: 1.5rem;
    line-height: 1.1;
  }

  .page-about .about-node__ver {
    margin-top: 0;
  }

  .page-about .about-overview__grid,
  .page-about .about-team__grid {
    gap: 56px;
  }

  .page-about .about-hero__title {
    max-width: 22ch;
  }

  .page-about .about-hero__lede {
    font-size: 1.06rem;
    max-width: 46ch;
  }
}

@media (min-width: 1100px) {
  .page-about .about-index__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-band {
    padding: 52px 0 48px;
  }

  .page-about .about-stat .stat__num {
    font-size: 2.4rem;
  }
}