.page-about {
  background: var(--bone);
  color: var(--lead);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--ink-900);
  color: var(--white);
  padding: 32px 0 56px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(112deg, rgba(255, 122, 47, .055) 0 1px, transparent 1px 28px),
    radial-gradient(110% 85% at 88% 4%, rgba(255, 122, 47, .22), transparent 62%),
    radial-gradient(95% 70% at 4% 96%, rgba(76, 224, 210, .12), transparent 60%);
  pointer-events: none;
}

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

.page-about .about-hero-grid {
  display: grid;
  gap: 36px;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  opacity: .45;
}

.page-about .breadcrumb a {
  color: rgba(255, 255, 255, .72);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--amber);
}

.page-about .about-hero .eyebrow {
  margin: 26px 0 0;
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
}

.page-about .about-hero-title {
  margin: 16px 0 0;
  font-family: var(--font-head);
  font-size: clamp(38px, 8.6vw, 78px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-hero-lead {
  margin: 22px 0 0;
  max-width: 40ch;
  font-size: 17px;
  line-height: 1.78;
  color: rgba(255, 255, 255, .84);
}

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

.page-about .about-hero-actions .btn {
  letter-spacing: .02em;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 38px 0 0;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .about-hero-stats > div {
  background: var(--ink-900);
  padding: 14px 12px 16px;
}

.page-about .about-hero-stats dt {
  font-size: 11px;
  letter-spacing: .1em;
  color: rgba(255, 255, 255, .58);
  margin-bottom: 6px;
}

.page-about .about-hero-stats dd {
  margin: 0;
  font-size: clamp(18px, 4vw, 24px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: .01em;
}

.page-about .about-hero-figure {
  margin: 0;
}

.page-about .about-hero-figure figcaption,
.page-about .about-method-banner figcaption,
.page-about .about-team-figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray);
}

.page-about .about-hero-figure figcaption {
  color: rgba(255, 255, 255, .6);
}

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

/* ---------- 通用章节 ---------- */
.page-about .section {
  padding: 58px 0;
}

.page-about .about-sec-head {
  max-width: 62ch;
}

.page-about .about-sec-head .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--wine);
}

.page-about .section--dark .about-sec-head .eyebrow,
.page-about .section--wine .about-sec-head .eyebrow,
.page-about .section--indigo .about-sec-head .eyebrow {
  color: var(--amber);
}

.page-about .about-sec-head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(27px, 5vw, 44px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.01em;
}

.page-about .about-sec-lead {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--gray);
}

.page-about .section--dark .about-sec-lead,
.page-about .section--wine .about-sec-lead,
.page-about .section--indigo .about-sec-lead {
  color: rgba(255, 255, 255, .78);
}

/* ---------- 起点 ---------- */
.page-about .about-origin-grid {
  display: grid;
  gap: 40px;
}

.page-about .about-origin-copy .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--wine);
}

.page-about .about-origin-copy h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(27px, 5vw, 44px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.01em;
}

.page-about .about-pull {
  margin: 28px 0 0;
  padding-left: 18px;
  border-left: 3px solid var(--orange);
  font-family: var(--font-head);
  font-size: clamp(24px, 4.6vw, 42px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--ink-900);
}

.page-about .prose {
  margin-top: 28px;
  max-width: 68ch;
}

.page-about .prose p {
  margin: 0 0 20px;
  font-size: 16.5px;
  line-height: 1.82;
  color: var(--lead);
}

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

.page-about .about-origin-note {
  border-top: 2px solid var(--ink-900);
  padding-top: 20px;
}

.page-about .about-origin-note h3 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -.005em;
}

.page-about .about-note-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-note-list li {
  position: relative;
  padding: 10px 0 10px 20px;
  border-bottom: 1px solid var(--line-light);
  font-size: 15px;
  line-height: 1.65;
  color: var(--lead);
}

.page-about .about-note-list li:last-child {
  border-bottom: 0;
}

.page-about .about-note-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 8px;
  height: 8px;
  background: var(--orange);
  border-radius: 1px;
}

/* ---------- 方法 ---------- */
.page-about .about-method-banner {
  margin: 34px 0 0;
}

.page-about .about-steps {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-steps li {
  position: relative;
  background: #FFFFFF;
  border: 1px solid var(--line-light);
  border-top: 3px solid var(--orange);
  padding: 24px 22px 26px;
}

.page-about .about-steps li:nth-child(2) {
  border-top-color: var(--amber);
}

.page-about .about-steps li:nth-child(3) {
  border-top-color: var(--wine);
}

.page-about .about-step-num {
  display: block;
  font-size: 26px;
  line-height: 1;
  letter-spacing: .04em;
  color: rgba(26, 31, 30, .28);
  margin-bottom: 14px;
}

.page-about .about-steps h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -.005em;
}

.page-about .about-steps p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--lead);
}

/* ---------- 发展阶段时间轴 ---------- */
.page-about .about-stages .about-sec-head {
  margin-bottom: 44px;
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .tl-item {
  position: relative;
  padding-left: 74px;
  padding-bottom: 44px;
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 56px;
  top: 12px;
  bottom: 0;
  width: 1px;
  background: var(--line-light);
}

.page-about .tl-item:last-child::before {
  display: none;
}

.page-about .tl-item::after {
  content: "";
  position: absolute;
  left: 50px;
  top: 4px;
  width: 11px;
  height: 11px;
  box-sizing: content-box;
  border: 3px solid var(--orange);
  border-radius: 50%;
  background: var(--bone);
}

.page-about .tl-year {
  position: absolute;
  left: 0;
  top: 0;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--gray);
  text-decoration: none;
  padding: 2px 0;
}

.page-about .tl-year:hover,
.page-about .tl-year:focus-visible {
  color: var(--orange);
  outline: none;
}

.page-about .tl-body h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -.005em;
}

.page-about .tl-body p {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--lead);
}

/* ---------- 团队（酒红分区） ---------- */
.page-about .section--wine {
  background: var(--wine);
  color: var(--white);
}

.page-about .about-team-grid {
  display: grid;
  gap: 38px;
}

.page-about .about-team-copy h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(27px, 5vw, 44px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .about-team-lead {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: 16.5px;
  line-height: 1.78;
  color: rgba(255, 255, 255, .82);
}

.page-about .about-team .chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-about .about-team .chip {
  appearance: none;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, .3);
  border-radius: 999px;
  color: var(--white);
  padding: 8px 15px;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.4;
  cursor: pointer;
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

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

.page-about .about-team .chip[aria-pressed="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-900);
  font-weight: 600;
}

.page-about .shift-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .shift-item {
  background: rgba(0, 0, 0, .16);
  border: 1px solid rgba(255, 255, 255, .18);
  padding: 18px;
}

.page-about .shift-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 9px;
  background: var(--amber);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
}

.page-about .shift-item h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -.005em;
  color: var(--white);
}

.page-about .shift-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(255, 255, 255, .76);
}

.page-about .about-team-figure {
  margin: 0;
}

/* ---------- 服务半径（深色分区） ---------- */
.page-about .section--dark {
  background: var(--ink-800);
  color: var(--white);
}

.page-about .about-reach-grid {
  margin-top: 36px;
  display: grid;
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .about-reach-cell {
  background: var(--ink-800);
  padding: 24px 20px 26px;
}

.page-about .about-reach-num {
  display: block;
  font-size: clamp(36px, 7vw, 54px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .about-reach-label {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .72);
}

.page-about .about-reach-cell p {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(255, 255, 255, .8);
}

/* ---------- 合作（靛紫分区） ---------- */
.page-about .section--indigo {
  position: relative;
  background: var(--indigo);
  color: var(--white);
  overflow: hidden;
}

.page-about .about-coop::before {
  content: "";
  position: absolute;
  right: -150px;
  top: -130px;
  width: 440px;
  height: 440px;
  border-radius: 46% 54% 62% 38% / 52% 38% 62% 48%;
  background: radial-gradient(circle at 34% 34%, rgba(255, 122, 47, .34), rgba(255, 122, 47, 0) 68%);
  pointer-events: none;
}

.page-about .about-coop::after {
  content: "";
  position: absolute;
  left: -130px;
  bottom: -170px;
  width: 380px;
  height: 380px;
  border-radius: 58% 42% 38% 62% / 44% 56% 44% 56%;
  background: radial-gradient(circle at 60% 40%, rgba(76, 224, 210, .22), rgba(76, 224, 210, 0) 70%);
  pointer-events: none;
}

.page-about .about-coop-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 38px;
}

.page-about .about-coop-copy h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(27px, 5vw, 44px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .about-coop-copy p {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .84);
}

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

.page-about .about-contact-card {
  align-self: start;
  background: rgba(0, 0, 0, .24);
  border: 1px solid rgba(255, 255, 255, .2);
  padding: 24px 22px 26px;
}

.page-about .about-contact-title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 900;
  letter-spacing: .01em;
  color: var(--amber);
}

.page-about .about-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-contact-list li {
  padding: 13px 0;
  border-bottom: 1px solid rgba(255, 255, 255, .13);
}

.page-about .about-contact-list li:last-child {
  border-bottom: 0;
}

.page-about .about-contact-label {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: rgba(255, 255, 255, .55);
}

.page-about .about-contact-value {
  display: block;
  font-size: 15px;
  line-height: 1.65;
  color: var(--white);
  word-break: break-word;
}

.page-about .about-contact-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(255, 255, 255, .2);
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .68);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero {
    padding: 40px 0 68px;
  }

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

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

@media (min-width: 900px) {
  .page-about .section {
    padding: 92px 0;
  }

  .page-about .about-hero {
    padding: 48px 0 88px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .72fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-hero-lead {
    font-size: 18px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .55fr);
    gap: 72px;
    align-items: start;
  }

  .page-about .about-origin-note {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-steps {
    grid-template-columns: 1.15fr .95fr .9fr;
    gap: 24px;
    margin-top: 44px;
  }

  .page-about .about-steps li {
    padding: 28px 26px 30px;
  }

  .page-about .tl-item {
    padding-left: 98px;
    padding-bottom: 62px;
  }

  .page-about .tl-item::before {
    left: 78px;
  }

  .page-about .tl-item::after {
    left: 72px;
    width: 12px;
    height: 12px;
  }

  .page-about .tl-year {
    font-size: 14px;
    letter-spacing: .08em;
  }

  .page-about .tl-body h3 {
    font-size: 22px;
  }

  .page-about .tl-body p {
    font-size: 16px;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, .68fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-coop-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .8fr);
    gap: 64px;
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-about .about-reach-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-hero-stats dd {
    font-size: 26px;
  }

  .page-about .prose p {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team .chip,
  .page-about .tl-year {
    transition: none;
  }
}
<<<END>>>