.page-about {
  background-color: var(--yj-ink-900);
  color: var(--yj-text);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-masthead {
  position: relative;
  padding: clamp(20px, 4vw, 40px) 0 clamp(34px, 6vw, 64px);
  overflow: hidden;
}

.page-about .about-masthead::after {
  content: "";
  position: absolute;
  top: -34%;
  right: -14%;
  width: min(620px, 82vw);
  height: min(620px, 82vw);
  background: radial-gradient(circle, rgba(217, 154, 43, 0.16), rgba(217, 154, 43, 0) 66%);
  pointer-events: none;
}

.page-about .about-masthead .yj-container {
  position: relative;
  z-index: 1;
}

.page-about .yj-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(20px, 4vw, 38px);
  font-family: var(--yj-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--yj-text-dim);
}

.page-about .yj-breadcrumb a {
  color: var(--yj-text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.3s var(--yj-ease), border-color 0.3s var(--yj-ease);
}

.page-about .yj-breadcrumb a:hover {
  color: var(--yj-amber);
  border-bottom-color: var(--yj-amber);
}

.page-about .about-masthead__eyebrow {
  margin: 0 0 14px;
  font-family: var(--yj-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--yj-amber);
}

.page-about .about-masthead__title {
  margin: 0;
  max-width: 20em;
  font-family: var(--yj-font-display);
  font-weight: 500;
  font-size: clamp(30px, 6.2vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--yj-text-strong);
}

.page-about .about-masthead__lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 44em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--yj-text);
}

.page-about .about-masthead__facts {
  list-style: none;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--yj-line-soft);
  border-top: 1px solid var(--yj-line-soft);
  border-bottom: 1px solid var(--yj-line-soft);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background-color: var(--yj-ink-900);
}

.page-about .about-fact__value {
  display: flex;
  align-items: baseline;
  gap: 5px;
  font-family: var(--yj-font-mono);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1;
  color: var(--yj-amber);
}

.page-about .about-fact__unit {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--yj-text-dim);
}

.page-about .about-fact__label {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--yj-text-dim);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-shell {
  padding-block: clamp(34px, 6vw, 72px) clamp(46px, 8vw, 96px);
}

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

.page-about .about-rail__title {
  margin: 0 0 14px;
  font-family: var(--yj-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--yj-mist);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 16px;
  border-left: 1px solid var(--yj-line-soft);
  display: grid;
  gap: 2px;
}

.page-about .about-rail__link {
  display: flex;
  gap: 9px;
  align-items: baseline;
  padding: 7px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--yj-text-dim);
  text-decoration: none;
  transition: color 0.3s var(--yj-ease);
}

.page-about .about-rail__no {
  font-family: var(--yj-font-mono);
  font-size: 11px;
  font-weight: 700;
  opacity: 0.75;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link.is-active {
  color: var(--yj-amber);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-block: clamp(28px, 5vw, 54px);
  border-top: 1px solid var(--yj-line-soft);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter__head {
  margin-bottom: clamp(22px, 4vw, 38px);
}

.page-about .about-chapter__head .yj-sec-head__index {
  font-family: var(--yj-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--yj-amber);
}

.page-about .about-chapter__title {
  margin: 10px 0 14px;
  font-family: var(--yj-font-display);
  font-weight: 500;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--yj-text-strong);
}

.page-about .about-chapter__sub {
  margin: 0;
  max-width: 42em;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.9;
  color: var(--yj-text);
}

/* ---------- 双栏 ---------- */
.page-about .about-duo {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  align-items: start;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 26px;
  border-left: 1px solid var(--yj-line);
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--yj-amber);
  box-shadow: 0 0 0 4px rgba(217, 154, 43, 0.14);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: 4px;
  font-family: var(--yj-font-mono);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--yj-amber);
}

.page-about .about-timeline__title {
  margin: 0 0 6px;
  font-family: var(--yj-font-display);
  font-weight: 500;
  font-size: 18px;
  line-height: 1.35;
  color: var(--yj-text-strong);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--yj-text-dim);
}

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

.page-about .about-figure .yj-figure__frame {
  border: 1px solid var(--yj-line-soft);
  background: linear-gradient(155deg, var(--yj-ink-700), var(--yj-ink-900));
  overflow: hidden;
}

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

.page-about .about-figure .yj-figure__caption {
  padding: 11px 2px 0;
  font-family: var(--yj-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--yj-text-dim);
}

.page-about .about-figure--wide {
  margin-top: clamp(24px, 4vw, 38px);
}

/* ---------- 重庆时效块 ---------- */
.page-about .about-callout {
  display: grid;
  gap: 8px;
  margin-top: clamp(24px, 4vw, 38px);
  padding: clamp(18px, 2.8vw, 26px) clamp(18px, 2.8vw, 28px);
  border-left: 3px solid var(--yj-orange);
  background-color: var(--yj-ink-800);
}

.page-about .about-callout__value {
  font-family: var(--yj-font-mono);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1;
  color: var(--yj-orange);
}

.page-about .about-callout__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--yj-text);
}

/* ---------- 认证标签页 ---------- */
.page-about .about-certs {
  min-width: 0;
}

.page-about .about-certs__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(16px, 2.6vw, 24px);
}

.page-about .about-cert-panel {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--yj-line);
  background-color: var(--yj-ink-800);
}

.page-about .about-cert-panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 1px dashed var(--yj-line-soft);
}

.page-about .about-cert-panel__year {
  font-family: var(--yj-font-mono);
  font-weight: 700;
  font-size: clamp(34px, 5.6vw, 52px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--yj-amber);
}

.page-about .about-cert-panel__count {
  font-family: var(--yj-font-mono);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--yj-text-strong);
}

.page-about .about-cert-panel__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--yj-text);
}

.page-about .about-cert-panel__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 20px;
}

/* ---------- 通用文字链 ---------- */
.page-about .about-link {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--yj-amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(217, 154, 43, 0.45);
  transition: color 0.3s var(--yj-ease), border-color 0.3s var(--yj-ease);
}

.page-about .about-link::after {
  content: " →";
}

.page-about .about-link:hover {
  color: var(--yj-amber-soft);
  border-bottom-color: var(--yj-amber-soft);
}

.page-about .about-inline-note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--yj-text-dim);
}

/* ---------- 三步流程 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background-color: var(--yj-line-soft);
  border: 1px solid var(--yj-line-soft);
}

.page-about .about-steps__item {
  padding: clamp(18px, 2.6vw, 26px);
  background-color: var(--yj-ink-800);
}

.page-about .about-steps__no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--yj-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--yj-teal);
}

.page-about .about-steps__title {
  margin: 0 0 8px;
  font-family: var(--yj-font-display);
  font-weight: 500;
  font-size: 19px;
  line-height: 1.35;
  color: var(--yj-text-strong);
}

.page-about .about-steps__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--yj-text-dim);
}

/* ---------- 区域矩阵 ---------- */
.page-about .about-regions {
  display: grid;
  gap: 1px;
  background-color: var(--yj-line-soft);
  border: 1px solid var(--yj-line-soft);
}

.page-about .about-region {
  padding: clamp(18px, 2.6vw, 26px);
  background-color: var(--yj-ink-800);
}

.page-about .about-region__name {
  margin: 0 0 14px;
  font-family: var(--yj-font-display);
  font-weight: 500;
  font-size: 20px;
  letter-spacing: 0.08em;
  color: var(--yj-amber);
}

.page-about .about-region__cities {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .about-region__cities li {
  position: relative;
  padding-left: 14px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--yj-text);
}

.page-about .about-region__cities li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 1px;
  background-color: var(--yj-teal);
}

/* ---------- 团队数字 ---------- */
.page-about .about-team {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(14px, 2.5vw, 26px);
}

.page-about .about-team__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 14px;
  border-top: 2px solid var(--yj-amber);
}

.page-about .about-team__value {
  font-family: var(--yj-font-mono);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1;
  color: var(--yj-text-strong);
}

.page-about .about-team__label {
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--yj-text-dim);
}

/* ---------- 合作生态 ---------- */
.page-about .about-supply {
  display: grid;
  gap: clamp(18px, 3vw, 26px);
}

.page-about .about-supply__col {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--yj-line);
  background-color: var(--yj-ink-800);
}

.page-about .about-supply__col--paper {
  background-color: var(--yj-paper);
  border-color: var(--yj-line);
  box-shadow: 8px 8px 0 0 rgba(0, 0, 0, 0.3);
}

.page-about .about-supply__title {
  margin: 0 0 18px;
  font-family: var(--yj-font-display);
  font-weight: 500;
  font-size: 19px;
  line-height: 1.35;
  color: var(--yj-text-strong);
}

.page-about .about-supply__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-supply__item {
  display: grid;
  gap: 6px;
}

.page-about .about-supply__num {
  font-family: var(--yj-font-mono);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 32px);
  line-height: 1;
  color: var(--yj-amber);
}

.page-about .about-supply__text {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--yj-text-dim);
}

.page-about .about-supply__col--paper .about-supply__title {
  color: var(--yj-ink-800);
}

.page-about .about-supply__col--paper .about-supply__num {
  color: #b07c17;
}

.page-about .about-supply__col--paper .about-supply__text {
  color: #3a4f63;
}

/* ---------- 荣誉 ---------- */
.page-about .about-honors {
  display: grid;
  gap: clamp(18px, 3vw, 26px);
}

.page-about .about-honor {
  padding-left: clamp(16px, 2.4vw, 22px);
  border-left: 2px solid var(--yj-line);
}

.page-about .about-honor__year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--yj-font-mono);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1;
  color: var(--yj-amber);
}

.page-about .about-honor__title {
  margin: 0 0 8px;
  font-family: var(--yj-font-display);
  font-weight: 500;
  font-size: 18px;
  line-height: 1.4;
  color: var(--yj-text-strong);
}

.page-about .about-honor__text {
  margin: 0 0 10px;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--yj-text-dim);
}

/* ---------- 收束 ---------- */
.page-about .about-outro {
  margin-top: clamp(28px, 4.5vw, 44px);
  padding-top: clamp(22px, 3.5vw, 34px);
  border-top: 1px dashed var(--yj-line);
}

.page-about .about-outro__nums {
  list-style: none;
  margin: 0 0 clamp(22px, 3.5vw, 32px);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.page-about .about-outro__nums li {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .about-outro__num {
  font-family: var(--yj-font-mono);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  color: var(--yj-amber);
}

.page-about .about-outro__unit {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--yj-text-dim);
}

.page-about .about-outro__text {
  margin: 0 0 18px;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--yj-text);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-masthead__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-fact {
    padding: 20px 18px;
  }

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

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

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

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

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

  .page-about .about-outro__action {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
  }

  .page-about .about-outro__text {
    margin-bottom: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-duo {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .about-duo--media-first {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  }

  .page-about .about-duo--media-first .about-duo__media {
    order: -1;
  }
}

@media (min-width: 1024px) {
  .page-about .about-shell.yj-container {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    gap: clamp(32px, 4.5vw, 64px);
    align-items: start;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 122px;
    align-self: start;
  }

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

  .page-about .about-timeline__item::before {
    left: -35px;
  }
}
<<<END>>>