.page-about {
  --about-r: 16px;
  --about-gap: 20px;
}

.page-about .crumbs {
  padding-top: 24px;
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding: 22px 0 44px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-intro .mono-label {
  display: inline-block;
  padding: 5px 11px;
  border: 1px solid var(--cyan-32);
  border-radius: var(--r-pill);
  color: var(--cyan);
}

.page-about .about-intro h1 {
  margin: 18px 0 0;
  font-size: clamp(30px, 6.4vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--mist);
  max-width: 18ch;
}

.page-about .about-intro h1 em {
  font-style: normal;
  background: linear-gradient(92deg, var(--cyan), var(--orange));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.page-about .about-intro__lead {
  margin: 22px 0 0;
  font-size: 19px;
  font-weight: 500;
  line-height: 1.72;
  color: var(--mist);
  max-width: 46ch;
}

.page-about .about-intro__body {
  margin: 14px 0 0;
  color: var(--steel);
  line-height: 1.85;
  max-width: 54ch;
}

.page-about .about-stats {
  margin: 32px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-r);
  overflow: hidden;
}

.page-about .about-stats__cell {
  margin: 0;
  padding: 16px 14px 18px;
  background: linear-gradient(180deg, var(--arena), rgba(18, 30, 51, 0.55));
}

.page-about .about-stats__cell:last-child {
  grid-column: 1 / -1;
}

.page-about .about-stats__cell dt {
  margin: 0 0 10px;
  color: var(--steel);
}

.page-about .about-stats__cell dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
  color: var(--mist);
}

.page-about .about-stats__cell .data-num {
  font-size: 30px;
  line-height: 1;
}

.page-about .about-stats__unit {
  font-size: 13px;
  color: var(--steel);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  padding: 46px 0 34px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-sec:last-of-type {
  border-bottom: 0;
}

.page-about .section__head {
  max-width: 74ch;
}

.page-about .section__index {
  color: var(--orange);
}

.page-about .section__title {
  margin: 10px 0 0;
  font-size: clamp(23px, 4.6vw, 36px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .section__lead {
  margin: 12px 0 0;
  color: var(--steel);
  line-height: 1.82;
  max-width: 60ch;
}

/* ---------- 01 时间轴 ---------- */
.page-about .about-track {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
}

.page-about .about-track__item {
  position: relative;
  padding: 0 0 26px 26px;
  border-left: 1px solid var(--line);
}

.page-about .about-track__item:last-child {
  padding-bottom: 6px;
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 7px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px var(--cyan-12);
}

.page-about .about-track__year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-about .about-track__name {
  margin: 6px 0 0;
  font-size: 17px;
  color: var(--mist);
}

.page-about .about-track__item p {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--steel);
}

/* ---------- 02 资料三类 ---------- */
.page-about .about-kinds {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
}

.page-about .about-kinds__item {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-kinds__item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-kinds__no {
  color: var(--cyan);
}

.page-about .about-kinds__body h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.4;
  color: var(--mist);
}

.page-about .about-kinds__body p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

.page-about .about-layers {
  margin: 30px 0 0;
  display: grid;
  gap: 16px;
}

.page-about .about-layer {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 8px 12px;
}

.page-about .about-layer__key {
  color: var(--steel);
}

.page-about .about-layer__val {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--mist);
}

.page-about .about-layer__val .data-num {
  font-size: 20px;
}

.page-about .about-layer__bar {
  grid-column: 1 / -1;
  display: block;
  height: 10px;
  border-radius: var(--r-pill);
  background: var(--panel);
}

.page-about .about-layer--1 .about-layer__bar {
  width: 100%;
  background: linear-gradient(90deg, rgba(43, 217, 228, 0.85), rgba(43, 217, 228, 0.18));
}

.page-about .about-layer--2 .about-layer__bar {
  width: 84%;
  background: linear-gradient(90deg, rgba(255, 122, 26, 0.85), rgba(255, 122, 26, 0.18));
}

.page-about .about-layer--3 .about-layer__bar {
  width: 66%;
  background: linear-gradient(90deg, rgba(255, 201, 60, 0.9), rgba(255, 201, 60, 0.16));
}

.page-about .about-layers__note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--steel);
  max-width: 62ch;
}

/* ---------- 通用配图 ---------- */
.page-about .about-figure {
  margin: 30px 0 0;
}

.page-about .about-figure .media-frame {
  border-radius: var(--about-r);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-figure__cap {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  margin: 30px 0 0;
  display: grid;
  gap: 32px;
}

.page-about .about-team__bars {
  display: grid;
  gap: 14px;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 84px 1fr auto;
  align-items: center;
  gap: 12px;
}

.page-about .about-team__role {
  font-size: 14px;
  color: var(--mist);
}

.page-about .about-team__bar {
  display: block;
  height: 9px;
  border-radius: var(--r-pill);
  background: var(--panel);
}

.page-about .about-team__row--1 .about-team__bar {
  width: 100%;
  background: linear-gradient(90deg, var(--cyan), rgba(43, 217, 228, 0.2));
}

.page-about .about-team__row--2 .about-team__bar {
  width: 58%;
  background: linear-gradient(90deg, var(--orange), rgba(255, 122, 26, 0.2));
}

.page-about .about-team__row--3 .about-team__bar {
  width: 50%;
  background: linear-gradient(90deg, var(--gold), rgba(255, 201, 60, 0.18));
}

.page-about .about-team__row--4 .about-team__bar {
  width: 25%;
  background: linear-gradient(90deg, var(--green), rgba(52, 211, 153, 0.18));
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--steel);
  text-align: right;
  min-width: 46px;
}

.page-about .about-roles {
  margin: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-role {
  border-left: 4px solid var(--orange);
  padding: 4px 0 4px 16px;
}

.page-about .about-role dt {
  font-size: 16px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-role dd {
  margin: 7px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--steel);
}

.page-about .about-figure--square {
  margin-top: 0;
}

/* ---------- 04 校验流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-flow__node {
  padding: 20px 18px 18px;
  background: var(--arena);
  border: 1px solid var(--line);
  border-radius: var(--about-r);
  transition: border-color var(--dur) ease, transform var(--dur) ease;
}

.page-about .about-flow__node:hover {
  border-color: var(--cyan-32);
  transform: translateY(-2px);
}

.page-about .about-flow__dot {
  display: block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.14);
  margin-bottom: 14px;
}

.page-about .about-flow__step {
  color: var(--steel);
}

.page-about .about-flow__title {
  margin: 8px 0 0;
  font-size: 19px;
  color: var(--mist);
}

.page-about .about-flow__node p {
  margin: 9px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--steel);
}

.page-about .about-flow__node .about-flow__who {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 05 版本演进 ---------- */
.page-about .about-vs {
  margin: 30px 0 0;
  display: grid;
  gap: 10px;
}

.page-about .about-vs__item {
  background: var(--arena);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color var(--dur) ease;
}

.page-about .about-vs__item[open] {
  border-color: var(--cyan-32);
}

.page-about .about-vs__item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  padding: 15px 16px;
}

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

.page-about .about-vs__item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-about .about-vs__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-about .about-vs__label {
  font-size: 15px;
  color: var(--mist);
}

.page-about .about-vs__body {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- 06 服务地区 ---------- */
.page-about .about-local {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-local__item {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-local__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-local__key {
  color: var(--cyan);
  padding-top: 4px;
}

.page-about .about-local__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- 07 荣誉 ---------- */
.page-about .about-honor {
  margin: 30px 0 0;
  display: grid;
  gap: 12px;
}

.page-about .about-honor__block {
  padding: 20px 18px;
  border-radius: var(--about-r);
  border: 1px solid var(--line);
  background: var(--arena);
}

.page-about .about-honor__block--a {
  border-left: 4px solid var(--cyan);
}

.page-about .about-honor__block--b {
  border-left: 4px solid var(--orange);
}

.page-about .about-honor__block--c {
  border-left: 4px solid var(--gold);
}

.page-about .about-honor__block .data-num {
  display: block;
  font-size: 34px;
  line-height: 1;
}

.page-about .about-honor__block p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- 尾链 ---------- */
.page-about .about-next {
  margin: 40px 0 8px;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--about-r);
  overflow: hidden;
}

.page-about .about-next__link {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: var(--night);
  text-decoration: none;
  transition: background var(--dur) ease;
}

.page-about .about-next__link:hover {
  background: var(--panel);
}

.page-about .about-next__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-about .about-next__k {
  color: var(--mist);
  font-size: 14px;
}

.page-about .about-next__v {
  font-size: 14px;
  color: var(--steel);
}

.page-about .about-next__link:hover .about-next__v {
  color: var(--cyan);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-intro {
    padding-top: 30px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-stats__cell:last-child {
    grid-column: auto;
  }

  .page-about .about-kinds__item {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .about-layer {
    grid-template-columns: 76px minmax(0, 1fr) 96px;
    gap: 8px 16px;
  }

  .page-about .about-layer__bar {
    grid-column: 2;
  }

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

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

  .page-about .about-honor__block--c {
    grid-column: 1 / -1;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-sec {
    padding: 58px 0 44px;
  }

  .page-about .about-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
    margin-top: 36px;
  }

  .page-about .about-track__item {
    padding: 24px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

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

  .page-about .about-track__item::before {
    left: 0;
    top: -4.5px;
  }

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

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    grid-template-areas:
      "bars figure"
      "roles figure";
    align-items: start;
    gap: 26px 34px;
  }

  .page-about .about-team__bars {
    grid-area: bars;
  }

  .page-about .about-roles {
    grid-area: roles;
  }

  .page-about .about-figure--square {
    grid-area: figure;
  }

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

  .page-about .about-honor__block--c {
    grid-column: auto;
  }

  .page-about .about-next {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow__node,
  .page-about .about-vs__item,
  .page-about .about-next__link {
    transition: none;
  }

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