.page-about {
  --about-rail: 210px;
  --about-gapx: clamp(24px, 4vw, 56px);
  --about-panel: rgba(255, 255, 255, .62);
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 顶部面包屑带 ---------- */
.page-about .about-topline {
  background: var(--deep);
  padding-top: clamp(14px, 2vw, 22px);
}

.page-about .about-topline .breadcrumb-link {
  color: var(--coral-soft);
}

.page-about .about-topline .breadcrumb-current {
  color: rgba(246, 241, 231, .72);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 0 0 clamp(30px, 6vw, 64px);
  background: linear-gradient(160deg, var(--deep) 0%, var(--night) 100%);
  color: var(--paper);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(38deg, rgba(216, 168, 85, .10) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(-38deg, rgba(111, 168, 160, .09) 0 1px, transparent 1px 36px);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
  padding-top: clamp(20px, 3vw, 32px);
}

.page-about .about-eyebrow {
  color: var(--sand);
  letter-spacing: .18em;
}

.page-about .about-hero h1 {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(27px, 4.6vw, 44px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: #FFF9F0;
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--coral-soft);
  border-bottom: 2px solid rgba(242, 101, 63, .55);
  padding-bottom: 2px;
}

.page-about .about-hero-lead {
  max-width: 34em;
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-size: 16px;
  line-height: 1.85;
  color: rgba(246, 241, 231, .84);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-fact {
  border-left: 2px solid rgba(216, 168, 85, .6);
  padding-left: 10px;
}

.page-about .about-fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1.2;
  color: var(--coral-soft);
}

.page-about .about-fact-label {
  display: block;
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(246, 241, 231, .62);
}

.page-about .about-hero-figure {
  margin: 0;
  border: 1px solid rgba(216, 168, 85, .55);
  padding: 6px;
  background: rgba(246, 241, 231, .06);
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

@media (min-width: 940px) {
  .page-about .about-hero-grid {
    grid-template-columns: 5fr 6fr;
  }
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 主体：左栏 + 内容流 ---------- */
.page-about .about-body {
  display: grid;
  gap: var(--about-gapx);
  padding-block: clamp(30px, 6vw, 72px);
}

.page-about .about-rail-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--rock);
  text-transform: uppercase;
}

.page-about .rail-list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .rail-list::-webkit-scrollbar {
  height: 4px;
}

.page-about .rail-list::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-about .rail-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border-bottom: 2px solid var(--line);
  color: var(--rock);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  border-bottom-color: var(--coral);
  color: var(--deep);
}

.page-about .rail-num {
  color: var(--sand);
}

@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-rail {
    position: sticky;
    top: 96px;
  }
  .page-about .rail-list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .rail-link {
    border-bottom: 0;
    border-left: 2px solid var(--line);
    padding: 12px 14px 12px 16px;
  }
  .page-about .rail-link:hover,
  .page-about .rail-link:focus-visible {
    border-left-color: var(--coral);
    background: rgba(242, 101, 63, .07);
  }
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding-block: clamp(26px, 4.5vw, 44px);
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}

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

.page-about .chapter-index {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--sand);
}

.page-about .about-chapter h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 3vw, 28px);
  line-height: 1.32;
  color: var(--deep);
}

.page-about .about-chapter p {
  max-width: 36em;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

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

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(16px, 3vw, 26px);
}

.page-about .team-card {
  background: var(--about-panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--mist);
  padding: 16px 18px 18px;
  transition: transform .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 22px rgba(14, 46, 69, .10);
}

.page-about .team-num {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  color: var(--coral);
}

.page-about .team-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.4;
  color: var(--deep);
}

.page-about .team-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--rock);
  max-width: none;
}

.page-about .team-quote {
  margin: 0;
  padding: 18px 18px 20px;
  background: var(--night);
  color: var(--paper);
  border: 1px solid var(--sand);
  box-shadow: 6px 6px 0 rgba(216, 168, 85, .22);
  font-size: 14px;
  line-height: 1.8;
}

@media (min-width: 720px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-about .team-grid {
    grid-template-columns: 5fr 4fr 3fr;
    align-items: start;
  }
  .page-about .team-card:nth-child(4) {
    grid-column: span 2;
  }
}

/* ---------- 整理流程 ---------- */
.page-about .process-split {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  margin-top: clamp(14px, 2.5vw, 22px);
}

.page-about .process-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: 10px;
}

.page-about .process-item {
  position: relative;
  padding: 14px 16px 16px 52px;
  background: var(--about-panel);
  border: 1px solid var(--line);
}

.page-about .process-item::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 14px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--coral);
}

.page-about .process-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  color: var(--deep);
}

.page-about .process-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--rock);
  max-width: none;
}

.page-about .process-note {
  margin-top: 14px;
  padding: 14px 16px;
  border-left: 3px solid var(--sand);
  background: rgba(216, 168, 85, .10);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .process-figure {
  margin: 0;
  border: 1px solid var(--line);
  padding: 6px;
  background: rgba(255, 255, 255, .5);
}

.page-about .process-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .media-caption {
  margin: 8px 2px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--rock);
}

@media (min-width: 860px) {
  .page-about .process-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }
}

/* ---------- 改版路径 ---------- */
.page-about .revision-figure {
  margin: 0 0 clamp(18px, 3vw, 28px);
  border: 1px solid var(--line);
  padding: 6px;
  background: var(--night);
}

.page-about .revision-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
}

.page-about .revision-figure .media-caption {
  color: rgba(246, 241, 231, .62);
}

.page-about .revision-list {
  display: flex;
  gap: 12px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .revision-list::-webkit-scrollbar {
  height: 4px;
}

.page-about .revision-list::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-about .revision-item {
  flex: 0 0 78%;
  border-top: 3px solid var(--line);
  padding-top: 12px;
  transition: border-color .24s var(--ease);
}

.page-about .revision-item:hover {
  border-top-color: var(--coral);
}

.page-about .revision-item--now {
  border-top-color: var(--coral);
}

.page-about .revision-tag {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--sand);
}

.page-about .revision-item--now .revision-tag {
  color: var(--coral);
}

.page-about .revision-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  color: var(--deep);
}

.page-about .revision-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--rock);
  max-width: none;
}

.page-about .revision-note {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rock);
}

@media (min-width: 900px) {
  .page-about .revision-list {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 16px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .revision-item {
    flex: initial;
  }
}

/* ---------- 节奏与规模 ---------- */
.page-about .pace-panel {
  margin-top: clamp(16px, 3vw, 24px);
  padding: clamp(16px, 3vw, 28px);
  background: linear-gradient(150deg, var(--deep), var(--night));
  color: var(--paper);
}

.page-about .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .stat-card {
  padding: 12px 12px 14px;
  background: rgba(246, 241, 231, .07);
  border: 1px solid rgba(216, 168, 85, .32);
}

.page-about .stat-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1.1;
  color: #FFF9F0;
}

.page-about .stat-unit {
  display: inline-block;
  margin-left: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--coral-soft);
}

.page-about .stat-desc {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.65;
  color: rgba(246, 241, 231, .70);
}

.page-about .pace-note {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rock);
}

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

/* ---------- 合作 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(14px, 2.5vw, 22px);
}

.page-about .partner-block {
  padding: 18px 18px 20px;
  background: var(--about-panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--mist);
}

.page-about .partner-block h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  color: var(--deep);
}

.page-about .partner-block p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  max-width: none;
}

.page-about .partner-link {
  margin: 0;
}

.page-about .partner-link a {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--coral);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 101, 63, .45);
  padding-bottom: 2px;
}

.page-about .partner-link a:hover,
.page-about .partner-link a:focus-visible {
  color: var(--deep);
  border-bottom-color: var(--deep);
}

@media (min-width: 860px) {
  .page-about .partner-grid {
    grid-template-columns: 4fr 6fr;
    align-items: start;
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  margin-top: clamp(26px, 4vw, 44px);
  padding: clamp(22px, 4vw, 40px);
  background: linear-gradient(135deg, var(--night), var(--deep));
  color: var(--paper);
  border-left: 4px solid var(--coral);
}

.page-about .about-next-kicker {
  margin: 0 0 8px;
  color: var(--sand);
  letter-spacing: .18em;
}

.page-about .about-next h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 2.8vw, 26px);
  line-height: 1.35;
  color: #FFF9F0;
}

.page-about .about-next p {
  max-width: 34em;
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(246, 241, 231, .82);
}

.page-about .about-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-next-links .btn--ghost {
  color: var(--paper);
  border-color: rgba(246, 241, 231, .45);
  background: transparent;
}

.page-about .about-next-links .btn--ghost:hover,
.page-about .about-next-links .btn--ghost:focus-visible {
  border-color: var(--coral-soft);
  color: var(--coral-soft);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .rail-link,
  .page-about .revision-item {
    transition: none;
  }
  .page-about .team-card:hover {
    transform: none;
  }
}