.page-about {
  --about-panel: #161A22;
  --about-panel-2: #1E232D;
  --about-line: rgba(255, 255, 255, 0.10);
  --about-dim: rgba(242, 237, 228, 0.74);
  background: var(--void);
  color: var(--paper);
  padding: 0 var(--gutter) clamp(40px, 7vw, 90px);
  overflow-x: hidden;
}

.page-about > * {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 22px 0 0;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--neutral);
}

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

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(255, 255, 255, 0.28);
}

.page-about .breadcrumb__item[aria-current="page"] {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 4vw, 52px) 0 clamp(34px, 5vw, 62px);
  border-bottom: 1px solid var(--hair);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 18px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--wukong-orange);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(30px, 6.4vw, 66px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-dim);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-fact {
  background: var(--about-panel);
  padding: 16px 16px 18px;
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(26px, 5vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-fact__key {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--neutral);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: clamp(44px, 7vw, 88px) 0 0;
  border-top: 1px solid var(--hair);
  margin-top: clamp(44px, 7vw, 88px);
}

.page-about .about-section:first-of-type {
  border-top: 0;
  margin-top: 0;
}

.page-about .about-section__mark {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--ice);
}

.page-about .about-section__mark span:first-child {
  font-family: var(--font-num);
  font-size: 16px;
  letter-spacing: 0.06em;
  color: var(--wukong-orange);
}

.page-about .about-section__title {
  margin: 0 0 20px;
  font-size: clamp(23px, 3.6vw, 38px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-section__body p {
  margin: 0 0 16px;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-dim);
}

.page-about .about-section__body a {
  color: var(--ice);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-section__body h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

/* ---------- 生产流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-flow__step {
  background: var(--about-panel);
  padding: 20px 18px 22px;
}

.page-about .about-flow__step p {
  margin: 0;
  max-width: none;
  font-size: 15px;
  line-height: 1.72;
  color: var(--about-dim);
}

.page-about .about-flow__idx {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--wukong-orange);
}

.page-about .about-flow__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 30px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--about-panel-2);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--neutral);
}

/* ---------- 更新节奏呼吸区 ---------- */
.page-about .about-band {
  position: relative;
  margin-top: clamp(44px, 7vw, 88px);
  padding: clamp(32px, 6vw, 60px) clamp(20px, 4vw, 52px);
  background: linear-gradient(104deg, var(--deep-ice) 0%, #124058 52%, var(--ink) 100%);
  clip-path: polygon(0 0, 100% 7%, 100% 100%, 0 93%);
}

.page-about .about-band__kicker {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--ice);
}

.page-about .about-band__text {
  margin: 0;
  max-width: 34em;
  font-size: clamp(17px, 2.6vw, 24px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
}

/* ---------- 团队 ---------- */
.page-about .about-crew {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-crew__card {
  background: var(--about-panel);
  padding: 20px 18px 22px;
}

.page-about .about-crew__card h3 {
  color: var(--ice);
}

.page-about .about-crew__card p {
  margin: 0;
  max-width: none;
  font-size: 15px;
  line-height: 1.72;
  color: var(--about-dim);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--wukong-orange) 0%, var(--ice) 52%, rgba(91, 200, 232, 0) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 30px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 4px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 7px;
  width: 11px;
  height: 11px;
  border: 1px solid var(--ice);
  border-radius: 50%;
  background: var(--ink);
}

.page-about .about-timeline__item--key::before {
  background: var(--wukong-orange);
  border-color: var(--wukong-orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 24, 0.16);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-num);
  font-size: clamp(21px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--ice);
}

.page-about .about-timeline__item--key .about-timeline__year {
  color: var(--wukong-orange);
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.76;
  color: var(--about-dim);
}

/* ---------- 数据条 ---------- */
.page-about .about-bars {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-bars__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px 14px;
  align-items: baseline;
}

.page-about .about-bars__label {
  font-size: 14px;
  line-height: 1.5;
  color: var(--about-dim);
}

.page-about .about-bars__val {
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-about .about-bars__track {
  grid-column: 1 / -1;
  position: relative;
  display: block;
  height: 6px;
  background: rgba(255, 255, 255, 0.07);
  overflow: hidden;
}

.page-about .about-bars__fill {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: var(--w, 50%);
  background: linear-gradient(90deg, var(--ice) 0%, var(--wukong-orange) 100%);
}

/* ---------- 合作 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

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

/* ---------- 问答组 ---------- */
.page-about .about-folds {
  margin-top: 26px;
  display: grid;
  gap: 8px;
}

.page-about .fold {
  border: 1px solid var(--about-line);
  background: var(--about-panel);
}

.page-about .fold__btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 18px;
  background: none;
  border: 0;
  color: var(--paper);
  font-family: inherit;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
}

.page-about .fold__btn:hover {
  color: var(--wukong-orange);
}

.page-about .fold__icon {
  position: relative;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
}

.page-about .fold__icon::before,
.page-about .fold__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--wukong-orange);
  transform: translate(-50%, -50%);
}

.page-about .fold__icon::before {
  width: 14px;
  height: 2px;
}

.page-about .fold__icon::after {
  width: 2px;
  height: 14px;
  transition: transform var(--dur) var(--ease);
}

.page-about .fold__btn[aria-expanded="true"] .fold__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-about .fold__panel {
  overflow: hidden;
  transition: height var(--dur) var(--ease);
}

.page-about .fold__inner {
  padding: 0 18px 18px;
}

.page-about .fold__inner p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.76;
  color: var(--about-dim);
}

/* ---------- 行动入口 ---------- */
.page-about .about-reach {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-split {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 34px;
  }

  .page-about .about-timeline {
    padding-left: 30px;
  }

  .page-about .about-timeline__item::before {
    left: -29px;
  }
}

@media (min-width: 960px) {
  .page-about .about-section {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 20px 48px;
  }

  .page-about .about-section__mark {
    writing-mode: vertical-rl;
    align-items: flex-start;
    gap: 14px;
    letter-spacing: 0.34em;
    height: fit-content;
    position: sticky;
    top: calc(var(--header-h) + 30px);
    padding-top: 6px;
  }

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

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

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 0 22px;
    align-items: start;
  }

  .page-about .about-timeline__year {
    margin-bottom: 0;
    padding-top: 2px;
  }

  .page-about .about-timeline__item::before {
    top: 9px;
  }

  .page-about .about-bars {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .fold__icon::after,
  .page-about .fold__panel {
    transition: none;
  }
}

.page-about {
  --w: 1rem;
}