/* ===== 品牌历程 · 页面专属样式（作用域 .page-about） ===== */
.page-about {
  --about-line-x: 14px;
  --about-gutter: 44px;
  --about-node: 20px;
}

/* ---------- 首屏 ---------- */
.page-about .about-head {
  padding-top: 104px;
  padding-bottom: 36px;
}

.page-about .about-kicker {
  margin: 18px 0 12px;
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-about .about-h1 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 30px;
  line-height: 1.28;
  letter-spacing: .01em;
  color: var(--text);
  text-shadow: 0 0 10px rgba(106, 13, 173, .6), 0 0 5px rgba(0, 229, 255, .3);
}

.page-about .about-lede {
  max-width: 64ch;
  margin: 0 0 30px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin: 0;
  padding: 2px;
  list-style: none;
  background: rgba(166, 163, 190, .14);
  border-radius: var(--r-m);
  overflow: hidden;
}

.page-about .about-stat {
  padding: 16px 14px;
  background: var(--panel);
}

.page-about .about-stat__n {
  display: block;
  font-size: 24px;
  line-height: 1.1;
  color: var(--cyan);
  text-shadow: 0 0 10px rgba(0, 229, 255, .35);
}

.page-about .about-stat__l {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 首屏配图 ---------- */
.page-about .about-hero {
  margin: 20px 0 0;
  border-radius: var(--r-l);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-hero img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 800;
  object-fit: cover;
}

/* ---------- 时间轴区 ---------- */
.page-about .about-tl {
  padding-top: 56px;
}

.page-about .tl-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 34px;
}

.page-about .tl-jump__a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 14px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--text);
  text-decoration: none;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: border-color .22s var(--ease), color .22s var(--ease);
}

.page-about .tl-jump__a:hover,
.page-about .tl-jump__a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-about .tl-jump__n {
  font-size: 12px;
  color: var(--purple-hi);
}

.page-about .tl-jump__a:hover .tl-jump__n {
  color: var(--cyan);
}

.page-about .tl {
  position: relative;
  padding-left: var(--about-gutter);
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: var(--about-line-x);
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg,
    rgba(166, 77, 255, .85) 0%,
    rgba(0, 229, 255, .7) 42%,
    rgba(0, 229, 255, .18) 100%);
}

.page-about .stage {
  position: relative;
  margin-bottom: 22px;
  scroll-margin-top: 96px;
}

.page-about .stage__node {
  position: absolute;
  left: -40px;
  top: 22px;
  z-index: 1;
  display: grid;
  place-items: center;
  width: var(--about-node);
  height: var(--about-node);
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--purple-hi);
  box-shadow: 0 0 0 4px rgba(106, 13, 173, .18), 0 0 12px rgba(166, 77, 255, .4);
}

.page-about .stage__node::after {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .stage__card {
  padding: 20px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  transition: border-color .22s var(--ease), transform .22s var(--ease);
}

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

.page-about .stage__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  margin-bottom: 12px;
}

.page-about .stage__num {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
  cursor: copy;
}

.page-about .stage__title {
  flex: 1 1 200px;
  min-width: 0;
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--text);
}

.page-about .stage__when {
  font-size: 12px;
  color: var(--muted);
}

.page-about .stage__verdict {
  margin: 0 0 10px;
  padding-left: 12px;
  border-left: 2px solid rgba(166, 77, 255, .6);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

.page-about .stage__figure {
  margin: .6em 0 0 !important;
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: .04em;
}

/* 折叠面板微调 */
.page-about .fold {
  border-top: 1px solid var(--line);
}

.page-about .fold__head {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 12px 0 10px;
  background: none;
  border: 0;
  color: var(--muted);
  font-family: inherit;
  font-size: 13px;
  text-align: left;
  cursor: pointer;
  transition: color .2s var(--ease);
}

.page-about .fold__head:hover,
.page-about .fold__head:focus-visible {
  color: var(--cyan);
}

.page-about .fold__idx {
  flex: 0 0 auto;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--purple-hi);
}

.page-about .fold__title {
  flex: 1 1 auto;
}

.page-about .fold__sign {
  position: relative;
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
}

.page-about .fold__sign::before,
.page-about .fold__sign::after {
  content: "";
  position: absolute;
  background: currentColor;
  border-radius: 1px;
}

.page-about .fold__sign::before {
  left: 0;
  right: 0;
  top: 5px;
  height: 2px;
}

.page-about .fold__sign::after {
  top: 0;
  bottom: 0;
  left: 5px;
  width: 2px;
  transition: transform .22s var(--ease);
}

.page-about .fold__head[aria-expanded="true"] .fold__sign::after {
  transform: scaleY(0);
}

.page-about .fold__body {
  padding: 2px 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .fold__body p {
  margin: 0 0 .9em;
}

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

/* 时间轴中的配图 */
.page-about .tl-media {
  margin: 0 0 22px;
}

.page-about .about-collab {
  margin: 0 0 28px;
}

.page-about .tl-media .media-frame,
.page-about .about-collab .media-frame {
  border-radius: var(--r-m);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .tl-media img,
.page-about .about-collab img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .media-fig__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 团队区 ---------- */
.page-about .about-team {
  padding-top: 56px;
}

.page-about .team-panel {
  margin-top: 4px;
}

.page-about .teamgrid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team {
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  transition: border-color .22s var(--ease), transform .22s var(--ease);
}

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

.page-about .team__blocks {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 14px;
}

.page-about .team__blocks i {
  display: block;
  width: 14px;
  height: 14px;
  border-radius: 3px;
  background: var(--purple-hi);
  box-shadow: 0 0 8px rgba(166, 77, 255, .5);
}

.page-about .team--proof .team__blocks i {
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(0, 229, 255, .5);
}

.page-about .team--tech .team__blocks i {
  background: var(--orange-soft);
  box-shadow: 0 0 8px rgba(255, 196, 107, .45);
}

.page-about .team--cs .team__blocks i {
  background: var(--green);
  box-shadow: 0 0 8px rgba(46, 230, 168, .45);
}

.page-about .team__role {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text);
}

.page-about .team__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .filter-empty {
  margin: 16px 0 0;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- 节奏区 ---------- */
.page-about .about-cadence {
  padding-top: 56px;
}

.page-about .cadlist {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .cadlist__item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .cadlist__n {
  flex: 0 0 auto;
  min-width: 84px;
  font-size: 19px;
  line-height: 1.3;
  color: var(--cyan);
}

.page-about .cadlist__t {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

/* ---------- 后续方向 ---------- */
.page-about .about-next {
  padding-top: 56px;
  padding-bottom: 88px;
}

.page-about .nextlist {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-about .nextlist__item {
  padding: 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  transition: border-color .22s var(--ease);
}

.page-about .nextlist__item:hover {
  border-color: var(--line-cyan);
}

.page-about .nextlist__n {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--purple-hi);
}

.page-about .nextlist__t {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--text);
}

.page-about .nextlist__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-paths {
  margin: 26px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-paths a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .35);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-about .about-paths a:hover,
.page-about .about-paths a:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* ---------- 动画：滚动显现兜底 ---------- */
.page-about [data-rise] {
  opacity: 1;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-head {
    padding-top: 116px;
  }

  .page-about .about-h1 {
    font-size: 34px;
  }

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

  .page-about .about-stat__n {
    font-size: 26px;
  }

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

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

  .page-about .nextlist__item:first-child {
    grid-column: 1 / -1;
  }

  .page-about .cadlist__item {
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-head {
    padding-top: 128px;
    padding-bottom: 44px;
  }

  .page-about .about-h1 {
    max-width: 22ch;
    font-size: 40px;
  }

  .page-about .about-lede {
    font-size: 17px;
  }

  .page-about .about-hero {
    margin-top: 28px;
  }

  .page-about .about-tl {
    padding-top: 72px;
  }

  .page-about .about-team,
  .page-about .about-cadence,
  .page-about .about-next {
    padding-top: 72px;
  }

  .page-about .about-next {
    padding-bottom: 112px;
  }

  .page-about .stage__card {
    padding: 24px 26px;
  }

  .page-about .stage__title {
    font-size: 20px;
  }

  .page-about .stage--narrow .stage__card {
    max-width: 74%;
  }

  .page-about .tl-media {
    max-width: 82%;
  }

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

  .page-about .nextlist__item:first-child {
    grid-column: auto;
  }

  .page-about .cadlist__item {
    gap: 28px;
  }

  .page-about .cadlist__n {
    min-width: 120px;
    font-size: 21px;
  }
}

@media (min-width: 1200px) {
  .page-about .stage--narrow .stage__card {
    max-width: 66%;
  }

  .page-about .tl-media {
    max-width: 70%;
  }

  .page-about .about-hero img {
    max-height: 520px;
  }
}