.page-about {
  --about-rule: var(--rule);
  --about-rule-strong: var(--rule-strong);
  --about-panel-cut: 15px;
  overflow-x: clip;
}

/* ---------- 通用小标 ---------- */
.page-about .about-kicker {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: 17px;
  letter-spacing: .14em;
  color: var(--ash);
}

.page-about .about-kicker__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--orange);
  border: 1px solid currentColor;
  padding: 1px 6px;
}

.page-about .about-kicker--onDark {
  color: var(--on-dark-muted);
}

.page-about .about-kicker--onDark .about-kicker__num {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 6vw, 60px) 0 clamp(34px, 6vw, 68px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 22% 0;
  background:
    linear-gradient(115deg, transparent 58%, rgba(255, 90, 31, .10) 58.4%, transparent 59%),
    linear-gradient(115deg, transparent 72%, rgba(0, 210, 198, .12) 72.4%, transparent 73%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 30px;
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  transform: skewX(-2deg);
  color: var(--obsidian);
}

.page-about .about-hero__intro {
  max-width: 34em;
  color: var(--ink-soft);
}

.page-about .about-hero__cta {
  margin-top: 22px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--dark-rule);
  border: 1px solid var(--obsidian);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-panel-cut)), calc(100% - var(--about-panel-cut)) 100%, 0 100%);
  background-color: var(--obsidian-deep);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--obsidian-deep);
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 34px);
  line-height: 1.05;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--on-dark-muted);
}

.page-about .about-hero__stat--wide {
  grid-column: span 2;
  border-top: 1px solid var(--dark-rule);
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: end;
    gap: 52px;
  }
  .page-about .about-hero__stats {
    transform: rotate(-1.6deg) translateY(6px);
    box-shadow: 14px 18px 0 rgba(14, 14, 16, .10);
  }
}

/* ---------- 主体骨架 ---------- */
.page-about .about-layout {
  display: block;
}

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

@media (min-width: 1040px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: 162px minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }
  .page-about .about-rail {
    display: block;
  }
  .page-about .about-rail__inner {
    position: sticky;
    top: 96px;
  }
}

.page-about .about-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--ash);
  text-transform: uppercase;
}

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

.page-about .about-rail__link {
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 8px 0 8px 12px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-rail__link span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ash);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link[aria-current="true"] {
  color: var(--obsidian);
  border-left-color: var(--orange);
}

.page-about .about-rail__link[aria-current="true"] span {
  color: var(--orange);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding: clamp(32px, 5vw, 56px) 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 8px;
}

.page-about .about-chapter__title {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.35;
  letter-spacing: .01em;
  color: var(--obsidian);
}

.page-about .about-chapter__text {
  max-width: 36em;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-chapter__link {
  margin-top: 12px;
}

.page-about .about-chapter--split {
  display: grid;
  gap: 26px;
}

@media (min-width: 880px) {
  .page-about .about-chapter--split {
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: 40px;
  }
  .page-about .about-chapter--reverse .about-figure {
    order: 1;
  }
  .page-about .about-chapter--reverse .about-chapter__col {
    order: 2;
  }
}

/* ---------- 引用块 ---------- */
.page-about .about-quote {
  margin: 26px 0 0;
  padding: 22px 24px;
  background: var(--cream);
  border-left: 3px solid var(--orange);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .about-quote p {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.5;
  color: var(--obsidian);
}

.page-about .about-quote cite {
  font-family: var(--font-mono);
  font-size: 12px;
  font-style: normal;
  color: var(--cyan-deep);
}

/* ---------- 三类访客 ---------- */
.page-about .about-audience {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-audience__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-audience__num {
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1.1;
  color: var(--obsidian);
  opacity: .28;
}

.page-about .about-audience__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--obsidian);
}

.page-about .about-audience__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

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

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--obsidian);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  background: var(--mist);
}

.page-about .about-figure .jsp-figcaption {
  margin-top: 10px;
}

/* ---------- 数据条 ---------- */
.page-about .about-metrics-band {
  margin: clamp(20px, 4vw, 36px) 0;
  padding: clamp(18px, 3vw, 28px);
  background: var(--cream);
  border: 1px solid var(--obsidian);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 15px), calc(100% - 15px) 100%, 0 100%);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: rgba(14, 14, 16, .18);
}

@media (min-width: 860px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--cream);
}

.page-about .about-metric__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1.1;
  color: var(--obsidian);
  font-variant-numeric: tabular-nums;
}

.page-about .about-metric__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ash);
}

/* ---------- 团队构成 ---------- */
.page-about .about-team {
  margin-top: 22px;
}

.page-about .about-team__track {
  display: flex;
  height: 40px;
  border: 1px solid var(--obsidian);
  background: var(--mist);
  overflow: hidden;
}

.page-about .about-team__seg {
  display: block;
  height: 100%;
  border-right: 1px solid var(--paper);
}

.page-about .about-team__seg:last-child {
  border-right: 0;
}

.page-about .about-team__seg--content { background: var(--orange); }
.page-about .about-team__seg--product { background: var(--cyan-deep); }
.page-about .about-team__seg--tech { background: var(--obsidian-deep); }
.page-about .about-team__seg--ops { background: var(--ash); }

.page-about .about-team__legend {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-about .about-team__legend li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.page-about .about-team__legend b {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--obsidian);
}

.page-about .about-team__dot {
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
}

.page-about .about-team__dot--content { background: var(--orange); }
.page-about .about-team__dot--product { background: var(--cyan-deep); }
.page-about .about-team__dot--tech { background: var(--obsidian-deep); }
.page-about .about-team__dot--ops { background: var(--ash); }

/* ---------- 版本时间线 ---------- */
.page-about .about-version {
  margin: 24px 0 22px;
  padding: 0;
  list-style: none;
  position: relative;
}

.page-about .about-version__item {
  position: relative;
  margin-left: 7px;
  padding: 0 0 24px 28px;
  border-left: 1px solid var(--about-rule-strong);
}

.page-about .about-version__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-version__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--ash);
}

.page-about .about-version__item--now::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 90, 31, .18);
}

.page-about .about-version__tag {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--cyan-deep);
}

.page-about .about-version__item--now .about-version__tag {
  color: var(--orange);
}

.page-about .about-version__item p {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 协作方 ---------- */
.page-about .about-partners {
  margin: clamp(28px, 5vw, 48px) 0 0;
  background: var(--obsidian-deep);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-partners__inner {
  padding: clamp(28px, 5vw, 48px) clamp(20px, 4vw, 44px);
}

.page-about .about-chapter__title--onDark {
  color: var(--paper);
}

.page-about .about-partners__text {
  max-width: 36em;
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-dark-muted);
}

.page-about .about-partners__list {
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--dark-rule);
  border-top: 1px solid var(--dark-rule);
  border-bottom: 1px solid var(--dark-rule);
}

.page-about .about-partners__list li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 14px 3px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--on-dark);
  background: var(--obsidian-deep);
}

.page-about .about-partners__num {
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

/* ---------- 收尾 ---------- */
.page-about .about-outro {
  padding: clamp(32px, 5vw, 56px) 0 clamp(40px, 6vw, 72px);
}

.page-about .about-outro__text {
  max-width: 32em;
  margin: 0 0 20px;
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.6;
  color: var(--obsidian);
}

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

/* ---------- 底部天际线 ---------- */
.page-about .about-skyline {
  margin: 0;
  position: relative;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-skyline img {
  display: block;
  width: 100%;
  height: clamp(180px, 26vw, 320px);
  object-fit: cover;
  object-position: center 60%;
  filter: saturate(.85) contrast(1.05);
}

.page-about .about-skyline .jsp-figcaption {
  position: absolute;
  left: clamp(18px, 4vw, 48px);
  bottom: 16px;
  margin: 0;
  padding: 6px 12px;
  background: rgba(14, 14, 16, .78);
  color: var(--on-dark);
  font-size: 12px;
}

@media (max-width: 560px) {
  .page-about .about-hero__stats {
    grid-template-columns: 1fr;
  }
  .page-about .about-hero__stat--wide {
    grid-column: auto;
    border-top: 1px solid var(--dark-rule);
  }
  .page-about .about-partners__list li {
    grid-template-columns: 46px minmax(0, 1fr);
  }
  .page-about .about-partners__num {
    font-size: 18px;
  }
  .page-about .about-team__track {
    height: 28px;
  }
}
<<<END>>>