.page-about {
  --about-hair: var(--navy-600);
  --about-gap: clamp(28px, 4.5vw, 56px);
  background: var(--navy-900);
  color: var(--ivory);
  font-family: var(--font-body);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb-wrap {
  padding-top: calc(var(--header-h) + 22px);
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 18px;
  letter-spacing: 0.08em;
  color: var(--on-dark-dim);
}

.page-about .about-crumb a {
  color: var(--on-dark-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--amber-light);
  border-bottom-color: var(--amber);
}

.page-about .about-crumb__sep {
  color: var(--on-dark-faint);
}

.page-about .about-crumb [aria-current="page"] {
  color: var(--amber);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(24px, 4vw, 44px) 0 clamp(52px, 7vw, 88px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 56px);
  align-items: start;
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(32px, 6.4vw, 56px);
  line-height: 1.14;
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--amber);
}

.page-about .about-hero__intro {
  margin: 22px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.95;
  color: var(--on-dark);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 28px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-fact {
  display: grid;
  gap: 6px;
  align-content: start;
  padding: 14px 14px 16px;
  background: var(--navy-800);
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.1;
  color: var(--amber-light);
  letter-spacing: 0.02em;
}

.page-about .about-fact__label {
  font-size: 12px;
  line-height: 18px;
  letter-spacing: 0.04em;
  color: var(--on-dark-dim);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 首屏控制台视觉 ---------- */
.page-about .about-console {
  border: 1px solid var(--about-hair);
  background: var(--navy-800);
  padding: clamp(14px, 2vw, 20px);
}

.page-about .about-console__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-hair);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 16px;
  letter-spacing: 0.14em;
  color: var(--on-dark-dim);
}

.page-about .about-console__status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--celadon);
  letter-spacing: 0.1em;
}

.page-about .about-console__status i {
  display: block;
  width: 6px;
  height: 6px;
  background: var(--celadon);
}

.page-about .about-console__stack {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.page-about .about-console__panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 13px;
  border: 1px solid var(--about-hair);
  background: var(--navy-900);
  font-size: 13px;
  line-height: 20px;
  color: var(--on-dark);
  transition: border-color var(--ease), color var(--ease);
}

.page-about .about-console__panel:nth-child(2) {
  margin-left: 12px;
}

.page-about .about-console__panel:nth-child(4) {
  margin-left: 24px;
}

.page-about .about-console__panel:hover {
  border-color: var(--amber);
  color: var(--paper);
}

.page-about .about-console__ticks {
  display: flex;
  gap: 3px;
  flex: 0 0 auto;
}

.page-about .about-console__ticks i {
  display: block;
  width: 3px;
  height: 12px;
  background: rgba(244, 241, 234, 0.16);
}

.page-about .about-console__ticks i:nth-child(-n + 4) {
  background: var(--amber);
}

.page-about .about-console__panel:nth-child(4) .about-console__ticks i {
  background: var(--celadon);
}

.page-about .about-console__foot {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--about-hair);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 16px;
  letter-spacing: 0.12em;
  color: var(--on-dark-faint);
}

/* ---------- 章节锚点条 ---------- */
.page-about .about-toc {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  background: var(--navy-800);
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-toc__inner {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  padding-top: 8px;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-toc__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid transparent;
  font-size: 13px;
  line-height: 20px;
  color: var(--on-dark-dim);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--amber-light);
  border-color: var(--about-hair);
  background: var(--navy-900);
}

.page-about .about-toc__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: clamp(52px, 7vw, 96px) 0;
}

.page-about .about-section--deep {
  background: var(--navy-800);
}

.page-about .about-section--paper {
  background: var(--ivory);
  color: var(--ink);
}

.page-about .about-section--indigo {
  background: var(--indigo);
  color: var(--ivory);
}

.page-about .about-section__head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-section h2 {
  margin: 12px 0 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(25px, 4.2vw, 38px);
  line-height: 1.25;
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-about .about-section--paper h2 {
  color: var(--ink);
}

.page-about .about-section__lead {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--on-dark);
}

.page-about .about-section--paper .about-section__lead {
  color: var(--slate);
}

.page-about .about-section--paper .eyebrow {
  color: var(--celadon-dark);
}

.page-about .about-section--indigo .eyebrow {
  color: var(--amber);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(30px, 4vw, 48px);
  border: 1px solid var(--about-hair);
  background: var(--navy-900);
}

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

.page-about .about-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--about-hair);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 18px;
  letter-spacing: 0.1em;
  color: var(--on-dark-dim);
}

.page-about .about-figure--paper {
  border-color: var(--line);
  background: var(--paper);
}

.page-about .about-figure--paper figcaption {
  border-top-color: var(--line);
  color: var(--slate);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-origin__year-mark {
  display: grid;
  gap: 14px;
  align-content: start;
  padding-left: 18px;
  border-left: 2px solid var(--amber);
}

.page-about .about-origin__year {
  font-family: var(--font-mono);
  font-size: clamp(52px, 12vw, 84px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--amber);
}

.page-about .about-origin__year-note {
  font-size: 12px;
  line-height: 20px;
  letter-spacing: 0.1em;
  color: var(--on-dark-dim);
}

.page-about .about-origin__para {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.95;
  color: var(--on-dark);
}

.page-about .about-origin__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-origin__list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--on-dark);
}

.page-about .about-origin__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 10px;
  height: 1px;
  background: var(--amber);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding-left: 22px;
  border-left: 1px solid var(--about-hair);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 8px;
  width: 7px;
  height: 7px;
  background: var(--amber);
  transition: background var(--ease);
}

.page-about .about-timeline__item:hover::before {
  background: var(--celadon);
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--amber-light);
}

.page-about .about-timeline__body {
  border: 1px solid var(--about-hair);
  background: var(--navy-800);
  padding: 16px 18px 18px;
  transition: border-color var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__body {
  border-color: var(--amber);
}

.page-about .about-timeline__body h3 {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-size: 17px;
  line-height: 26px;
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--on-dark);
}

/* ---------- 酒红分隔带 ---------- */
.page-about .about-band {
  background: var(--wine);
}

.page-about .about-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.page-about .about-band__text {
  margin: 0;
  font-size: 14px;
  line-height: 24px;
  letter-spacing: 0.04em;
  color: var(--ivory);
}

.page-about .about-band__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 18px;
  letter-spacing: 0.18em;
  color: var(--amber-light);
}

/* ---------- 03 设备端 ---------- */
.page-about .about-devices {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-device {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--navy-900);
  transition: box-shadow var(--ease), background var(--ease);
}

.page-about .about-device:hover {
  background: var(--navy-800);
  box-shadow: inset 2px 0 0 var(--amber);
}

.page-about .about-device__index {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-device__name {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 18px;
  line-height: 26px;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-about .about-device__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--on-dark);
}

/* ---------- 04 节奏 ---------- */
.page-about .about-rhythm__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-beat {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: clamp(16px, 2vw, 22px);
  border: 1px solid var(--about-hair);
  background: var(--navy-800);
  transition: border-color var(--ease);
}

.page-about .about-beat:hover {
  border-color: var(--amber);
}

.page-about .about-beat__cycle {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 18px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-beat__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 17px;
  line-height: 26px;
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-about .about-beat__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--on-dark);
}

/* ---------- 05 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  margin-bottom: clamp(30px, 4vw, 48px);
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 24px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-team-stat {
  display: grid;
  gap: 6px;
  align-content: start;
  padding: 16px;
  background: var(--paper);
}

.page-about .about-team-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1;
  color: var(--celadon-dark);
}

.page-about .about-team-stat__label {
  font-size: 13px;
  line-height: 20px;
  color: var(--slate);
}

.page-about .about-team__panel {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: clamp(18px, 3vw, 28px);
}

.page-about .about-team__panel h3 {
  margin: 0 0 14px;
  font-family: var(--font-heading);
  font-size: 18px;
  line-height: 26px;
  letter-spacing: 0.03em;
  color: var(--ink);
}

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

.page-about .about-team__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--ink);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 1px;
  background: var(--celadon-dark);
}

.page-about .about-team__list strong {
  font-weight: 600;
  color: var(--ink);
}

/* ---------- 06 覆盖 ---------- */
.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-reach__stat {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--navy-800);
}

.page-about .about-reach__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.6vw, 40px);
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: var(--amber-light);
}

.page-about .about-reach__unit {
  font-size: 13px;
  line-height: 20px;
  letter-spacing: 0.04em;
  color: var(--on-dark-dim);
}

.page-about .about-reach__scenes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 32px);
}

.page-about .about-scene {
  border-left: 1px solid var(--about-hair);
  padding-left: clamp(16px, 2.4vw, 26px);
}

.page-about .about-scene h3 {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-size: 19px;
  line-height: 28px;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-about .about-scene p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--on-dark);
}

.page-about .about-scene__link {
  display: inline-block;
  margin-top: 14px;
  padding-bottom: 2px;
  font-size: 14px;
  line-height: 22px;
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid var(--amber);
  transition: color var(--ease), border-color var(--ease);
}

.page-about .about-scene__link:hover,
.page-about .about-scene__link:focus-visible {
  color: var(--amber-light);
  border-bottom-color: var(--amber-light);
}

/* ---------- 07 协作 ---------- */
.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(244, 241, 234, 0.16);
  border: 1px solid rgba(244, 241, 234, 0.16);
}

.page-about .about-eco__card {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--indigo);
  transition: background var(--ease);
}

.page-about .about-eco__card:hover {
  background: #2c2258;
}

.page-about .about-eco__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.1;
  color: var(--amber-light);
}

.page-about .about-eco__label {
  font-size: 14px;
  line-height: 22px;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-about .about-eco__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--on-dark);
}

/* ---------- 收束入口 ---------- */
.page-about .about-cta {
  background: var(--navy-800);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-cta__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-cta__desc {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--on-dark);
  max-width: 52ch;
}

.page-about .about-cta__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-cta__links a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--navy-900);
  font-size: 15px;
  line-height: 24px;
  color: var(--ivory);
  text-decoration: none;
  transition: background var(--ease), color var(--ease);
}

.page-about .about-cta__links a:hover,
.page-about .about-cta__links a:focus-visible {
  background: var(--navy-800);
  color: var(--amber-light);
}

.page-about .about-cta__index {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 16px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .about-cta__arrow {
  margin-left: auto;
  color: var(--on-dark-faint);
  transition: color var(--ease);
}

.page-about .about-cta__links a:hover .about-cta__arrow {
  color: var(--amber);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

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

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

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

@media (min-width: 760px) {
  .page-about .about-rhythm__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 88px);
  }

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

  .page-about .about-cta__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  }

  .page-about .about-timeline {
    gap: clamp(28px, 3.4vw, 40px);
  }

  .page-about .about-timeline__item {
    grid-template-columns: 128px minmax(0, 1fr);
    column-gap: clamp(24px, 3vw, 44px);
    padding-left: 0;
    border-left: 0;
  }

  .page-about .about-timeline::before {
    content: "";
    position: absolute;
    left: 128px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: var(--about-hair);
  }

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

  .page-about .about-timeline__item::before {
    left: calc(128px - 3.5px);
    top: 9px;
  }

  .page-about .about-timeline__year {
    text-align: right;
    padding-right: 22px;
    font-size: clamp(24px, 2.6vw, 30px);
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(40px, 5vw, 72px);
  }
}

@media (min-width: 1024px) {
  .page-about .about-devices {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 1100px) {
  .page-about .about-hero__lead {
    position: relative;
    padding-left: 40px;
  }

  .page-about .about-hero__eyebrow {
    position: absolute;
    left: 0;
    top: 4px;
    margin: 0;
    writing-mode: vertical-rl;
    letter-spacing: 0.3em;
    font-size: 11px;
    line-height: 1;
    color: var(--on-dark-dim);
  }
}
<<<END>>>