/* ============ 品牌概况 · page-about ============ */
.page-about {
  --about-gauge: 176px;
  --about-gap: 46px;
  background: var(--paper);
  color: var(--ink);
}

.page-about .breadcrumb {
  padding-top: 18px;
  padding-bottom: 14px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  border-bottom: 3px solid var(--navy-900);
  background: var(--paper);
  overflow: hidden;
}

.page-about .about-hero__inner {
  position: relative;
  padding-top: 6px;
  padding-bottom: 44px;
}

.page-about .about-hero__rule {
  height: 30px;
  margin-bottom: 26px;
  border-bottom: 2px solid var(--navy-900);
  background-image: repeating-linear-gradient(to right, rgba(11, 37, 69, .45) 0 2px, transparent 2px 16px);
  background-size: 100% 10px;
  background-position: left bottom;
  background-repeat: repeat-x;
}

.page-about .about-hero__no {
  display: inline-block;
  margin: 0 0 22px;
  padding: 5px 12px 4px;
  font-size: 12.5px;
  letter-spacing: .16em;
  color: var(--navy-900);
  background: var(--orange-soft);
  border: 2px solid var(--navy-900);
}

.page-about .about-hero__title {
  margin: 0 0 26px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(35px, 7.2vw, 76px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--navy-900);
  max-width: 15em;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--ink);
}

/* ---------- 主体栅格 + 左侧刻度 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-gauge {
  display: none;
}

.page-about .about-gauge__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
  border-left: 2px solid var(--line);
  display: grid;
  gap: 26px;
}

.page-about .about-gauge__item {
  position: relative;
  display: grid;
  gap: 3px;
}

.page-about .about-gauge__item::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 9px;
  width: 14px;
  height: 2px;
  background: var(--navy-900);
}

.page-about .about-gauge__no {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--grey);
}

.page-about .about-gauge__name {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--navy-900);
}

.page-about .about-canvas {
  min-width: 0;
}

@media (min-width: 940px) {
  .page-about .about-body {
    grid-template-columns: var(--about-gauge) minmax(0, 1fr);
    column-gap: var(--about-gap);
  }

  .page-about .about-gauge {
    display: block;
    align-self: start;
    position: sticky;
    top: 112px;
    padding: 62px 0 40px;
  }
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  padding: 46px 0 52px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-block:first-child {
  border-top: 3px solid var(--navy-900);
}

.page-about .block-no {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--grey);
}

.page-about .block-no::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: var(--line);
}

.page-about .about-block h2 {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.1vw, 34px);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--navy-900);
  max-width: 22em;
}

.page-about .about-text {
  max-width: 66ch;
}

.page-about .about-text p {
  margin: 0 0 1.15em;
  font-size: 16.5px;
  line-height: 1.85;
}

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

.page-about .about-text--lead {
  margin-bottom: 26px;
}

.page-about .about-text a {
  color: var(--blue-500);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-about .about-text a:hover {
  color: var(--orange);
}

.page-about .about-note {
  margin: 26px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--orange);
  background: var(--paper-2);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 图片容器 ---------- */
.page-about .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

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

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin: 34px 0 0;
}

.page-about .team-cell {
  position: relative;
  padding: 26px 0 22px;
}

.page-about .team-cell::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: var(--navy-900);
  transition: background-color .2s var(--ease);
}

.page-about .team-cell:hover::before,
.page-about .team-cell:focus-within::before {
  background: var(--orange);
}

.page-about .team-cell__no {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-about .team-cell__title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--navy-900);
}

.page-about .team-cell__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

@media (min-width: 760px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 30px;
  }

  .page-about .team-cell + .team-cell {
    padding-left: 30px;
    border-left: 1px solid var(--line);
  }
}

/* ---------- 规模数字 ---------- */
.page-about .scale-stats {
  list-style: none;
  margin: 30px 0 28px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 3px solid var(--navy-900);
}

.page-about .scale-stat {
  padding: 18px 16px 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .scale-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(25px, 4.4vw, 38px);
  line-height: 1.12;
  letter-spacing: -.01em;
  color: var(--navy-900);
}

.page-about .scale-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 13.5px;
  letter-spacing: .05em;
  color: var(--grey);
}

@media (min-width: 700px) {
  .page-about .scale-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .scale-stat {
    padding-right: 24px;
  }
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 30px;
}

.page-about .about-timeline__nodes {
  min-width: 0;
}

.page-about .ver-node {
  border-top: 2px solid var(--navy-900);
}

.page-about .ver-node:last-child {
  border-bottom: 2px solid var(--navy-900);
}

.page-about .ver-node__head {
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr) 20px;
  align-items: baseline;
  column-gap: 16px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .ver-node__head::-webkit-details-marker {
  display: none;
}

.page-about .ver-node__tag {
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--teal);
}

.page-about .ver-node__title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--navy-900);
  transition: color .2s var(--ease);
}

.page-about .ver-node__head:hover .ver-node__title,
.page-about .ver-node[open] .ver-node__title {
  color: var(--orange);
}

.page-about .ver-node__mark {
  position: relative;
  width: 16px;
  height: 16px;
  align-self: center;
  justify-self: end;
}

.page-about .ver-node__mark::before,
.page-about .ver-node__mark::after {
  content: "";
  position: absolute;
  background: var(--orange);
}

.page-about .ver-node__mark::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-about .ver-node__mark::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
  transition: transform .22s var(--ease);
}

.page-about .ver-node[open] .ver-node__mark::after {
  transform: scaleY(0);
}

.page-about .ver-node__body {
  padding: 0 26px 20px 132px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .ver-node__body p {
  margin: 0;
}

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

.page-about .about-timeline__cap {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--grey);
}

@media (max-width: 640px) {
  .page-about .ver-node__head {
    grid-template-columns: minmax(0, 1fr) 20px;
    row-gap: 5px;
  }

  .page-about .ver-node__tag {
    grid-column: 1 / -1;
  }

  .page-about .ver-node__mark {
    grid-column: 2;
    grid-row: 2;
  }

  .page-about .ver-node__body {
    padding-left: 0;
    padding-right: 0;
  }
}

@media (min-width: 1040px) {
  .page-about .about-timeline {
    grid-template-columns: minmax(0, 1fr) 300px;
    column-gap: 42px;
    align-items: start;
  }

  .page-about .about-timeline__aside {
    position: sticky;
    top: 118px;
  }
}

/* ---------- 资质 ---------- */
.page-about .cert-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 28px;
}

.page-about .cert-layout__media {
  margin: 0;
}

.page-about .cert-layout__cap {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--grey);
}

.page-about .cert-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .cert-sticker {
  position: relative;
  min-height: 132px;
  perspective: 700px;
  outline: none;
}

.page-about .cert-sticker:nth-child(1) {
  transform: rotate(-.7deg);
}

.page-about .cert-sticker:nth-child(3) {
  transform: rotate(.6deg);
}

.page-about .cert-sticker:focus-visible .cert-sticker__face--front {
  box-shadow: var(--hard-shadow), 0 0 0 3px var(--orange-soft);
}

.page-about .cert-sticker__face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  padding: 18px 20px;
  border: 2px solid var(--navy-900);
  background: var(--paper);
  box-shadow: var(--hard-shadow);
  transition: opacity .2s var(--ease), transform .28s var(--ease);
}

.page-about .cert-sticker__face--front {
  transform: rotateY(0deg);
}

.page-about .cert-sticker__face--back {
  opacity: 0;
  transform: rotateY(-14deg) translateY(4px);
  background: var(--navy-900);
  border-color: var(--navy-900);
  color: var(--paper);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .cert-sticker__face--back p {
  margin: 0;
}

.page-about .cert-sticker__code {
  font-size: 12.5px;
  letter-spacing: .16em;
  color: var(--grey);
}

.page-about .cert-sticker__name {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--navy-900);
}

.page-about .cert-sticker:hover .cert-sticker__face--front,
.page-about .cert-sticker:focus .cert-sticker__face--front {
  opacity: 0;
  transform: rotateY(14deg) translateY(-4px);
}

.page-about .cert-sticker:hover .cert-sticker__face--back,
.page-about .cert-sticker:focus .cert-sticker__face--back {
  opacity: 1;
  transform: rotateY(0) translateY(0);
}

@media (min-width: 700px) {
  .page-about .cert-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .cert-layout {
    grid-template-columns: 300px minmax(0, 1fr);
    column-gap: 42px;
    align-items: start;
  }
}

/* ---------- 工作习惯 ---------- */
.page-about .habit-list {
  list-style: none;
  margin: 26px 0 30px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .habit {
  display: grid;
  gap: 6px;
  padding: 18px 16px 20px;
  background: var(--paper);
}

.page-about .habit__no {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--teal);
}

.page-about .habit__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy-900);
}

@media (min-width: 720px) {
  .page-about .habit-list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

/* ---------- 底部推进 ---------- */
.page-about .about-cta {
  position: relative;
  margin: 38px 0 56px;
  padding: 34px 26px 36px;
  background: var(--paper-2);
  border: 3px solid var(--navy-900);
  box-shadow: var(--hard-shadow);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 110px;
  height: 5px;
  background: var(--orange);
}

.page-about .about-cta__no {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--grey);
}

.page-about .about-cta h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.32;
  letter-spacing: -.01em;
  color: var(--navy-900);
}

.page-about .about-cta p {
  margin: 0 0 22px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-cta p a {
  color: var(--blue-500);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-about .about-cta p a:hover {
  color: var(--orange);
}

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

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .team-cell::before,
  .page-about .ver-node__title,
  .page-about .ver-node__mark::after,
  .page-about .cert-sticker__face {
    transition: none;
  }
}
<<<END>>>