.page-about {
  --about-rail-w: 168px;
  --about-side-gap: 40px;
  background: var(--rj-paper);
  color: var(--rj-ink);
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 56px;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -40px;
  width: 260px;
  height: 420px;
  background: var(--rj-orange);
  opacity: .18;
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

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

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .about-hero__eyebrow {
  color: var(--rj-cyan);
  letter-spacing: .22em;
  display: block;
  margin-bottom: 14px;
}

.page-about .about-hero__title {
  color: var(--rj-paper);
  margin: 0 0 20px;
  max-width: 16em;
}

.page-about .about-hero__sub {
  color: #cfd6d2;
  max-width: 44ch;
  margin: 0;
}

.page-about .about-hero__glass {
  border: 1px solid rgba(0, 224, 255, .28);
  padding: 22px 20px 18px;
  align-self: end;
}

.page-about .about-hero__glass-cap {
  color: var(--rj-cyan);
  letter-spacing: .2em;
  margin: 0 0 16px;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: 0;
}

.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-hero__fact dt {
  font-size: 12px;
  color: var(--rj-green-soft);
  letter-spacing: .08em;
}

.page-about .about-hero__fact dd {
  margin: 0;
  line-height: 1;
}

.page-about .about-hero__glass-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(0, 224, 255, .2);
  font-size: 13px;
  color: #9fb8b0;
}

/* ===== 布局：左侧阶段轨 + 正文 ===== */
.page-about .about-layout {
  max-width: var(--rj-maxw);
  margin: 0 auto;
  padding: 0 18px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

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

.page-about .about-body {
  min-width: 0;
  padding: 46px 0 0;
}

.page-about .about-section {
  padding: 44px 0;
  scroll-margin-top: 90px;
}

.page-about .about-section + .about-section {
  border-top: 1px solid var(--rj-line);
}

.page-about .about-section--path,
.page-about .about-section--scale,
.page-about .about-section--value {
  border-top: 0;
}

.page-about .about-section__head {
  margin-bottom: 28px;
}

.page-about .about-section__head .rj-annotation {
  display: block;
  margin-bottom: 12px;
  color: var(--rj-orange-deep);
  letter-spacing: .2em;
}

.page-about .about-section__ann--light {
  color: var(--rj-cyan) !important;
}

.page-about .about-section__title {
  margin: 0;
  max-width: 22em;
}

.page-about .about-section__title--light {
  color: var(--rj-paper);
}

.page-about .about-section__sub {
  margin: 14px 0 0;
  color: var(--rj-gray);
  max-width: 50ch;
  font-size: 16px;
  line-height: 1.7;
}

/* ===== 段落文本 ===== */
.page-about .about-prose p {
  font-size: 17px;
  line-height: 1.8;
  color: #2c2c30;
  margin: 0 0 18px;
  max-width: 62ch;
}

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

.page-about .about-pills {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-pills .rj-btn {
  display: inline-block;
}

/* ===== 时间线 ===== */
.page-about .about-timeline {
  position: relative;
  padding-left: 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(180deg, var(--rj-orange), var(--rj-orange-deep) 60%, var(--rj-green) 100%);
}

.page-about .about-node {
  position: relative;
  margin-bottom: 10px;
}

.page-about .about-node__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 14px 14px 0;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--rj-line);
  text-align: left;
  cursor: pointer;
  color: var(--rj-ink);
  font: inherit;
}

.page-about .about-node__marker {
  position: absolute;
  left: -26px;
  top: 22px;
  width: 16px;
  height: 16px;
  display: grid;
  place-items: center;
}

.page-about .about-node__pulse {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--rj-paper);
  border: 3px solid var(--rj-orange);
  box-shadow: 0 0 0 3px #fff;
}

.page-about .about-node__pulse--now {
  background: var(--rj-cyan);
  border-color: var(--rj-orange);
  animation: about-pulse 1.6s ease-in-out infinite;
}

@keyframes about-pulse {
  0%, 100% { box-shadow: 0 0 0 3px #fff, 0 0 0 0 rgba(255, 77, 28, .5); }
  50%      { box-shadow: 0 0 0 3px #fff, 0 0 0 8px rgba(255, 77, 28, 0); }
}

.page-about .about-node__meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1 1 auto;
  min-width: 0;
}

.page-about .about-node__meta .rj-annotation {
  color: var(--rj-gray);
  letter-spacing: .18em;
}

.page-about .about-node__name {
  margin: 0;
  font-weight: 700;
}

.page-about .about-node__tag {
  flex: 0 0 auto;
  font-family: var(--rj-font-mono);
  font-weight: 700;
}

.page-about .about-node__sign {
  flex: 0 0 auto;
  color: var(--rj-orange);
  font-family: var(--rj-font-mono);
  font-size: 18px;
  line-height: 1;
}

.page-about .about-node__panel {
  overflow: hidden;
}

.page-about .about-node__inner {
  padding: 14px 20px 20px 0;
  color: #3a3a3f;
  font-size: 16px;
  line-height: 1.75;
  border-left: 3px solid var(--rj-orange);
  padding-left: 16px;
  margin: 10px 0 14px;
}

.page-about .about-node__inner p {
  margin: 0;
}

/* ===== 团队 ===== */
.page-about .about-team__grid {
  margin-bottom: 30px;
}

.page-about .about-team__card {
  padding: 20px;
}

.page-about .about-team__card .rj-annotation {
  display: block;
  color: var(--rj-orange-deep);
  letter-spacing: .16em;
  margin-bottom: 10px;
}

.page-about .about-team__card h3 {
  margin: 0 0 10px;
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: #414146;
}

/* ===== 覆盖范围 ===== */
.page-about .about-section--scale {
  padding: 52px 18px;
  margin: 0 -18px;
}

.page-about .about-scale__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-bottom: 32px;
}

.page-about .about-scale__item {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 16px;
  row-gap: 8px;
  align-items: baseline;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(0, 224, 255, .18);
}

.page-about .about-scale__cap {
  color: var(--rj-cyan);
  font-size: 11px;
  letter-spacing: .18em;
  align-self: center;
}

.page-about .about-scale__item p {
  grid-column: 1 / -1;
  margin: 0;
  color: #b8c6c1;
  font-size: 15px;
  line-height: 1.72;
}

/* ===== 合作 ===== */
.page-about .about-prose--split {
  display: grid;
  gap: 0 34px;
}

/* ===== 价值收束 ===== */
.page-about .about-section--value {
  padding: 52px 18px;
  margin: 0 -18px;
}

.page-about .about-value__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .about-value__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
}

.page-about .about-value__no {
  font-family: var(--rj-font-mono);
  font-weight: 700;
  font-size: 22px;
  color: var(--rj-orange);
  line-height: 1;
  padding-top: 4px;
}

.page-about .about-value__name {
  margin: 0 0 8px;
  color: var(--rj-paper);
}

.page-about .about-value__item p {
  margin: 0 0 10px;
  color: #a9bab5;
  font-size: 15px;
  line-height: 1.72;
}

.page-about .about-value__item .rj-link-arrow {
  color: var(--rj-cyan);
  font-size: 14px;
}

.page-about .about-cta {
  margin-top: 36px;
  padding-top: 26px;
  border-top: 2px solid var(--rj-orange);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-about .about-cta__text {
  margin: 0;
  color: var(--rj-paper);
  font-size: 17px;
  line-height: 1.7;
  max-width: 46ch;
}

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

.page-about .about-cta__btns .rj-btn {
  display: inline-block;
}

/* ===== 图片 ===== */
.page-about .about-path__figure,
.page-about .about-team__figure,
.page-about .about-scale__figure {
  margin: 32px 0 0;
}

.page-about .about-path__figure .rj-figure__media,
.page-about .about-team__figure .rj-figure__media,
.page-about .about-scale__figure .rj-figure__media {
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
}

.page-about .about-scale__figure .rj-figure__media {
  clip-path: polygon(0 6%, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-scale__figure .rj-figure__cap {
  color: #96aca5;
}

.page-about .about-section--scale .about-section__head .rj-annotation,
.page-about .about-section--value .about-section__head .rj-annotation {
  color: var(--rj-cyan);
}

/* ===== 桌面布局 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 46px 0 74px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(280px, 1fr);
    gap: 44px;
    align-items: end;
  }

  .page-about .about-layout {
    padding: 0 26px;
  }

  .page-about .about-body {
    padding-top: 56px;
  }

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

  .page-about .about-prose--split p:first-child {
    grid-column: 1;
  }

  .page-about .about-prose--split p:nth-child(2) {
    grid-column: 2;
    margin-top: 34px;
  }

  .page-about .about-prose--split p:nth-child(3) {
    grid-column: 1 / -1;
    max-width: 66ch;
  }

  .page-about .about-scale__row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px;
  }

  .page-about .about-value__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 34px;
  }

  .page-about .about-cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-side-gap);
    padding: 0 34px;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 108px;
    align-self: start;
    padding: 60px 0 40px;
  }

  .page-about .about-rail__label {
    color: var(--rj-gray);
    letter-spacing: .3em;
    font-size: 10px;
    margin: 0 0 22px;
  }

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

  .page-about .about-rail__list a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 0 11px 14px;
    color: var(--rj-gray);
    text-decoration: none;
    font-size: 13px;
    line-height: 1.4;
    border-left: 2px solid transparent;
    margin-left: -1px;
    transition: color .18s var(--rj-ease), border-color .18s var(--rj-ease), background .18s var(--rj-ease);
  }

  .page-about .about-rail__dot {
    width: 6px;
    height: 6px;
    background: var(--rj-line);
    flex: 0 0 auto;
    transition: background .18s var(--rj-ease);
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    color: var(--rj-ink);
    border-left-color: var(--rj-orange);
    background: rgba(255, 77, 28, .06);
  }

  .page-about .about-rail__list a:hover .about-rail__dot {
    background: var(--rj-orange);
  }

  .page-about .about-section {
    padding: 58px 0;
  }

  .page-about .about-section--scale,
  .page-about .about-section--value {
    padding: 66px 40px;
    margin: 0 -40px;
  }

  .page-about .about-section__title {
    max-width: 18em;
  }

  .page-about .about-timeline {
    padding-left: 34px;
  }

  .page-about .about-timeline::before {
    left: 11px;
  }

  .page-about .about-node__marker {
    left: -34px;
  }

  .page-about .about-scale__item {
    border-bottom: 0;
    border-left: 1px solid rgba(0, 224, 255, .2);
    padding: 0 0 0 20px;
  }
}

@media (min-width: 1280px) {
  .page-about {
    --about-rail-w: 186px;
    --about-side-gap: 56px;
  }

  .page-about .about-path__figure {
    max-width: 720px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node__pulse--now {
    animation: none;
  }
}