.page-about {
  --about-line: rgba(20, 22, 26, 0.13);
  --about-soft: #E7DDCA;
  --about-onink-dim: rgba(247, 244, 236, 0.72);
  background: var(--paper);
  color: var(--char);
}

.page-about img {
  max-width: 100%;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--mist);
  padding: clamp(18px, 3.5vw, 36px) 0 clamp(30px, 5vw, 60px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 72%;
  height: 100%;
  background: linear-gradient(155deg, rgba(46, 111, 158, 0.32), rgba(140, 47, 57, 0.38));
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(20px, 4vw, 40px);
  min-width: 0;
}

.page-about .about-hero-text {
  min-width: 0;
}

.page-about .about-hero .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 clamp(14px, 2vw, 22px);
  padding: 0;
}

.page-about .about-hero .breadcrumb li {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--about-onink-dim);
}

.page-about .about-hero .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  opacity: 0.5;
}

.page-about .about-hero .breadcrumb a {
  color: var(--yellow);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb a:hover,
.page-about .about-hero .breadcrumb a:focus-visible {
  text-decoration: underline;
}

.page-about .about-hero .eyebrow {
  color: var(--yellow);
  margin: 0 0 12px;
}

.page-about .about-hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(29px, 5.2vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.035em;
  margin: 0 0 clamp(14px, 2vw, 20px);
  color: var(--mist);
  text-wrap: balance;
}

.page-about .about-hero-lede {
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: rgba(247, 244, 236, 0.86);
  max-width: 42em;
  margin: 0 0 clamp(18px, 3vw, 28px);
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 3vw, 36px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-hero-meta li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-hero-meta strong {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--yellow);
}

.page-about .about-hero-meta span {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--about-onink-dim);
}

.page-about .about-hero-media {
  margin: 0;
  min-width: 0;
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 3px;
  border-bottom: 3px solid var(--claret);
}

/* ---------- 章节索引 ---------- */
.page-about .about-jump {
  background: var(--char);
}

.page-about .about-jump-inner {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding-top: 8px;
  padding-bottom: 8px;
  scrollbar-width: none;
}

.page-about .about-jump-inner::-webkit-scrollbar {
  display: none;
}

.page-about .jump-link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  flex: 0 0 auto;
  padding: 6px 10px;
  border-radius: 2px;
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .jump-num {
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: 15px;
  color: var(--yellow);
  transition: color 0.18s var(--ease);
}

.page-about .jump-link:hover,
.page-about .jump-link:focus-visible {
  background: var(--yellow);
  color: var(--char);
}

.page-about .jump-link:hover .jump-num,
.page-about .jump-link:focus-visible .jump-num {
  color: var(--char);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-layout {
  padding-top: clamp(26px, 4vw, 54px);
  padding-bottom: clamp(36px, 6vw, 80px);
  min-width: 0;
}

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

.page-about .about-chapters {
  min-width: 0;
}

.page-about .spine-track {
  position: relative;
  padding-left: 22px;
  display: grid;
  gap: 4px;
}

.page-about .spine-track::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--claret), var(--blue) 38%, var(--green) 66%, var(--yellow));
}

.page-about .spine-node {
  position: relative;
  display: block;
  padding: 6px 0;
  text-decoration: none;
  color: var(--graphite);
  transition: color 0.18s var(--ease);
}

.page-about .spine-node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 12px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--claret);
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .spine-year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--char);
}

.page-about .spine-note {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 12px;
  line-height: 1.55;
  color: var(--graphite);
  transition: max-height 0.22s var(--ease), opacity 0.22s var(--ease);
}

.page-about .spine-node:hover .spine-note,
.page-about .spine-node:focus-visible .spine-note {
  max-height: 4em;
  opacity: 1;
}

.page-about .spine-node:hover,
.page-about .spine-node:focus-visible {
  color: var(--claret-deep);
}

.page-about .spine-node:hover::before,
.page-about .spine-node:focus-visible::before {
  background: var(--yellow);
  border-color: var(--char);
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  position: relative;
  padding-top: clamp(24px, 3.6vw, 42px);
  margin-top: clamp(26px, 4vw, 52px);
  min-width: 0;
}

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

.page-about .chapter::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--blue) 0 20%,
    var(--about-soft) 20% 40%,
    var(--red) 40% 60%,
    var(--green) 60% 80%,
    var(--yellow) 80% 100%
  );
  opacity: 0.9;
}

.page-about .chapter-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 26px);
  align-items: end;
  margin-bottom: clamp(12px, 2vw, 20px);
}

.page-about .chapter-index {
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: clamp(46px, 8vw, 96px);
  line-height: 0.78;
  letter-spacing: -0.05em;
  color: var(--claret);
}

.page-about .chapter-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 3vw, 32px);
  line-height: 1.22;
  letter-spacing: -0.03em;
  color: var(--char);
  margin: 0;
  text-wrap: balance;
}

.page-about .chapter-body {
  min-width: 0;
}

.page-about .chapter-body p {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--char);
  max-width: 44em;
  margin: 0 0 14px;
}

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

/* ---------- 更新节奏 ---------- */
.page-about .rhythm-list {
  list-style: none;
  margin: clamp(16px, 2.5vw, 26px) 0 0;
  padding: 0;
}

.page-about .rhythm-item {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 14px 0 14px 22px;
  border-left: 2px solid var(--about-line);
}

.page-about .rhythm-item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 20px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--green);
}

.page-about .rhythm-time {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--claret);
}

.page-about .rhythm-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--char);
}

/* ---------- 团队 ---------- */
.page-about .team-panel {
  margin-top: clamp(18px, 3vw, 28px);
  background: var(--ink);
  border-radius: 4px;
  padding: clamp(18px, 3vw, 32px);
  color: var(--mist);
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  min-width: 0;
}

.page-about .team-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  min-width: 0;
}

.page-about .team-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: clamp(12px, 1.8vw, 16px);
  background: rgba(247, 244, 236, 0.07);
  border: 1px solid rgba(247, 244, 236, 0.17);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  border-radius: 3px;
}

.page-about .team-num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--yellow);
}

.page-about .team-label {
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--about-onink-dim);
}

.page-about .team-media {
  margin: 0;
  min-width: 0;
}

.page-about .team-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 3px;
}

/* ---------- 版本演进 ---------- */
.page-about .version-track {
  list-style: none;
  margin: clamp(16px, 2.5vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .version-item {
  display: grid;
  gap: 6px;
  padding: clamp(14px, 2vw, 18px);
  background: var(--about-soft);
  border-radius: 3px;
  border-left: 4px solid var(--claret);
}

.page-about .version-item:nth-child(4n + 2) {
  border-left-color: var(--blue);
}

.page-about .version-item:nth-child(4n + 3) {
  border-left-color: var(--green);
}

.page-about .version-item:nth-child(4n + 4) {
  border-left-color: var(--yellow);
}

.page-about .version-tag {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--claret-deep);
}

.page-about .version-body h3 {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--char);
}

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

/* ---------- 合作 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: clamp(16px, 3vw, 28px);
  margin-top: clamp(4px, 1vw, 8px);
  min-width: 0;
}

.page-about .partner-media {
  margin: 0;
  min-width: 0;
}

.page-about .partner-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 3px;
  border-top: 3px solid var(--claret);
}

.page-about .partner-text {
  min-width: 0;
}

.page-about .partner-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(14px, 2vw, 20px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .partner-tag {
  font-size: 12px;
  letter-spacing: 0.05em;
  padding: 6px 10px;
  border-radius: 2px;
  background: var(--mist);
  color: var(--char);
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--claret);
}

.page-about .partner-tag:nth-child(2n) {
  border-left-color: var(--blue);
}

.page-about .partner-tag:nth-child(3n) {
  border-left-color: var(--green);
}

.page-about .partner-tag:nth-child(4n) {
  border-left-color: var(--yellow);
}

/* ---------- 资质与纠错 ---------- */
.page-about .assurance-grid {
  display: grid;
  gap: 10px;
  margin: clamp(16px, 2.5vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .assurance-item {
  padding: clamp(14px, 2vw, 18px);
  background: var(--mist);
  border-top: 3px solid var(--green);
  border-radius: 0 0 3px 3px;
}

.page-about .assurance-item:nth-child(2) {
  border-top-color: var(--blue);
}

.page-about .assurance-item:nth-child(3) {
  border-top-color: var(--claret);
}

.page-about .assurance-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--char);
}

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

/* ---------- 下一步 ---------- */
.page-about .next-grid {
  display: grid;
  gap: 12px;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .next-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 2.2vw, 20px);
  min-width: 0;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .next-card:hover {
  transform: translateY(-4px);
  border-color: var(--claret);
}

.page-about .next-index {
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: 28px;
  line-height: 1;
  color: var(--claret);
}

.page-about .next-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--char);
}

.page-about .next-card p {
  margin: 0 0 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--graphite);
  max-width: none;
}

.page-about .next-link {
  margin-top: auto;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--claret-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--yellow);
  align-self: flex-start;
  padding-bottom: 2px;
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  color: var(--char);
  border-bottom-color: var(--claret);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .team-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .rhythm-item {
    grid-template-columns: 156px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

  .page-about .version-item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
  }

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

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

@media (min-width: 820px) {
  .page-about .about-hero-inner {
    grid-template-columns: 1.08fr 0.92fr;
    align-items: end;
    gap: clamp(24px, 4vw, 48px);
  }

  .page-about .partner-grid {
    grid-template-columns: 0.92fr 1.08fr;
    align-items: start;
  }

  .page-about .team-panel {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(24px, 3.5vw, 56px);
    align-items: start;
  }

  .page-about .about-spine {
    display: block;
    position: sticky;
    top: 92px;
  }

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

@media (min-width: 1280px) {
  .page-about .chapter-index {
    font-size: 104px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .next-card,
  .page-about .jump-link,
  .page-about .spine-note,
  .page-about .spine-node::before,
  .page-about .jump-num {
    transition: none;
  }

  .page-about .next-card:hover {
    transform: none;
  }
}
<<<END>>>