.page-about {
  --about-pass: clamp(44px, 7vw, 88px);
  --about-inner: min(1280px, 100% - var(--gutter) * 2);
  --about-line: rgba(244, 232, 208, 0.2);
  background: var(--ink-deep);
  color: var(--coco);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
}

.page-about p {
  margin: 0;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--palm);
  margin-bottom: 8px;
}

.page-about .eyebrow--ink {
  color: var(--felt-deep);
}

.page-about .section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 3.4vw, 38px);
  line-height: 1.24;
  letter-spacing: 0.01em;
  color: var(--coco);
}

.page-about .section-title--ink {
  color: #10222a;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(20px, 4vw, 48px));
  padding-bottom: clamp(36px, 6vw, 72px);
  background:
    radial-gradient(90% 70% at 88% -8%, rgba(20, 107, 74, 0.5), transparent 62%),
    radial-gradient(70% 60% at 0% 104%, rgba(242, 138, 46, 0.14), transparent 66%),
    var(--ink-deep);
}

.page-about .about-hero-frame {
  position: relative;
  width: var(--about-inner);
  margin-inline: auto;
  padding: clamp(18px, 3vw, 40px);
  border: 1px solid var(--hair-strong);
  border-radius: 4px 30px 4px 30px;
  background: linear-gradient(165deg, rgba(12, 43, 54, 0.8), rgba(7, 26, 36, 0.55));
  box-shadow: var(--shadow-card);
}

.page-about .about-hero-frame::before,
.page-about .about-hero-frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  pointer-events: none;
}

.page-about .about-hero-frame::before {
  top: 12px;
  left: 12px;
  border-top: 2px solid var(--chip);
  border-left: 2px solid var(--chip);
}

.page-about .about-hero-frame::after {
  bottom: 12px;
  right: 12px;
  border-bottom: 2px solid var(--palm);
  border-right: 2px solid var(--palm);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.5vw, 44px);
}

.page-about .about-hero-media {
  position: relative;
  margin: 0;
  border-radius: 3px 100px 3px 3px;
  overflow: hidden;
  border: 1px solid var(--hair);
  background: var(--ink-night);
}

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

.page-about .about-hero-media figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 30px 14px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--paper);
  background: linear-gradient(to top, rgba(5, 16, 21, 0.9), transparent);
}

.page-about h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(31px, 6vw, 58px);
  line-height: 1.14;
  letter-spacing: 0.01em;
  color: var(--coco);
}

.page-about .about-hero-lead {
  margin-top: clamp(14px, 2.2vw, 20px);
  max-width: 60ch;
  color: rgba(253, 248, 238, 0.82);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-about .about-ledger {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(18px, 3vw, 28px) 0 0;
  background: var(--hair);
  border: 1px solid var(--hair);
  border-radius: 2px 14px 2px 2px;
  overflow: hidden;
}

.page-about .about-ledger > div {
  background: rgba(7, 26, 36, 0.88);
  padding: 12px 14px;
}

.page-about .about-ledger dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .about-ledger dd {
  margin: 5px 0 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(17px, 2.4vw, 23px);
  line-height: 1.2;
  color: var(--chip);
}

.page-about .about-hero-actions {
  margin-top: clamp(18px, 2.8vw, 26px);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  width: var(--about-inner);
  margin-inline: auto;
  padding-block: var(--about-pass);
}

.page-about .timeline-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
}

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

.page-about .rail-head {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--lamp);
  margin-bottom: 10px;
}

.page-about .rail-list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .rail-list > li {
  flex: 0 0 auto;
}

.page-about .rail-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 15px;
  color: var(--mist);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  white-space: nowrap;
  background: rgba(244, 232, 208, 0.07);
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  transition: color 0.18s ease, background 0.18s ease;
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  color: var(--ink-black);
  background: var(--paper);
}

.page-about .timeline-main {
  min-width: 0;
}

.page-about .timeline-head {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .timeline-head .section-title {
  margin-bottom: 10px;
}

.page-about .timeline-lead {
  max-width: 62ch;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .filter-btn {
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--hair-strong);
  border-radius: 2px 12px 2px 2px;
  background: transparent;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-about .filter-btn:hover {
  color: var(--paper);
  border-color: var(--palm);
}

.page-about .filter-btn[aria-pressed="true"] {
  background: var(--chip);
  border-color: var(--chip);
  color: var(--ink-black);
  font-weight: 700;
}

.page-about .filter-btn:focus-visible {
  outline: 2px solid var(--palm);
  outline-offset: 2px;
}

.page-about .version-list {
  margin: 0;
  padding: 0 0 0 clamp(14px, 2.4vw, 26px);
  list-style: none;
  border-left: 1px dashed var(--about-line);
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
}

.page-about .version-item {
  position: relative;
  scroll-margin-top: calc(var(--header-h) + 24px);
  min-width: 0;
}

.page-about .version-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(14px, 2.4vw, 26px) - 5px);
  top: 30px;
  width: 9px;
  height: 9px;
  background: var(--chip);
  transform: rotate(45deg);
}

.page-about [data-filtered-out="true"] {
  display: none;
}

.page-about .version-card {
  position: relative;
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid rgba(5, 16, 21, 0.16);
  border-radius: 2px 18px 2px 2px;
  background: linear-gradient(160deg, #f8efdd, var(--paper));
  color: #16252b;
  box-shadow: 0 22px 44px -38px #000;
  transition: transform 0.2s ease;
}

.page-about .version-card:hover,
.page-about .version-card:focus-within {
  transform: translateY(-2px) rotate(-0.25deg);
}

.page-about .version-tab {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 15px 3px 13px;
  background: var(--felt);
  color: var(--coco);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  clip-path: polygon(9px 0, 100% 0, calc(100% - 9px) 100%, 0 100%);
}

.page-about .version-card h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(16.5px, 2.1vw, 20px);
  line-height: 1.45;
  color: #10222a;
  margin-bottom: 8px;
}

.page-about .version-card > p {
  color: #3a4a4c;
  font-size: 14.5px;
  line-height: 1.75;
}

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

.page-about .v-tag {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 2px 8px 2px 2px;
  background: rgba(20, 107, 74, 0.14);
  border: 1px solid rgba(20, 107, 74, 0.34);
  color: #14513a;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
}

.page-about .v-tag--ghost {
  background: transparent;
  border-color: rgba(5, 16, 21, 0.22);
  color: #4a5a5b;
}

.page-about .version-more {
  margin-top: 12px;
  padding-top: 8px;
  border-top: 1px dashed rgba(5, 16, 21, 0.2);
}

.page-about .disclose-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0;
  border: 0;
  background: none;
  color: var(--felt-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.page-about .disclose-btn:focus-visible {
  outline: 2px solid var(--felt-deep);
  outline-offset: 3px;
}

.page-about .disclose-icon {
  display: inline-block;
  transition: transform 0.2s ease;
}

.page-about .disclose-btn[aria-expanded="true"] .disclose-icon {
  transform: rotate(180deg);
}

.page-about .disclose-panel {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.78;
  color: #33454a;
}

.page-about .disclose-panel[hidden] {
  display: none;
}

/* ---------- 纸质编审区 ---------- */
.page-about .about-paper {
  position: relative;
  padding-block: var(--about-pass);
  background: linear-gradient(180deg, #f7ecd8, var(--paper) 42%, #ecdabb);
  color: #14242b;
  clip-path: polygon(0 24px, 100% 0, 100% 100%, 0 100%);
}

.page-about .paper-inner {
  width: var(--about-inner);
  margin-inline: auto;
}

.page-about .paper-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: end;
}

.page-about .paper-lead {
  max-width: 62ch;
  margin-top: 10px;
  color: #3f4f52;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-seal {
  justify-self: start;
  display: inline-grid;
  place-items: center;
  width: 96px;
  height: 96px;
  border: 2px solid var(--coral);
  border-radius: 50%;
  color: var(--coral);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  line-height: 1.5;
  text-align: center;
  transform: rotate(-9deg);
  opacity: 0.9;
}

.page-about .proof-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(24px, 3.5vw, 36px);
}

.page-about .proof-step {
  padding: 20px 18px 18px;
  background: rgba(255, 255, 255, 0.52);
  border: 1px solid rgba(5, 16, 21, 0.14);
  border-radius: 2px 16px 2px 2px;
}

.page-about .proof-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--felt-deep);
  margin-bottom: 8px;
}

.page-about .proof-step h3 {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: #10222a;
  margin-bottom: 8px;
}

.page-about .proof-step p {
  font-size: 14px;
  line-height: 1.75;
  color: #3f4f52;
}

.page-about .paper-figure {
  margin: clamp(24px, 3.5vw, 36px) 0 0;
}

.page-about .paper-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 2px 24px 2px 2px;
  border: 1px solid rgba(5, 16, 21, 0.18);
}

.page-about .paper-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: #5c6a6b;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  width: var(--about-inner);
  margin-inline: auto;
  padding-block: var(--about-pass);
}

.page-about .team-head {
  max-width: 760px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .team-head .section-title {
  margin-bottom: 10px;
}

.page-about .team-lead {
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
  max-width: 60ch;
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

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

.page-about .team-ring {
  position: relative;
  width: min(240px, 70vw);
  aspect-ratio: 1 / 1;
  margin-inline: auto;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(
    var(--felt) 0turn 0.4286turn,
    var(--chip) 0.4286turn 0.75turn,
    var(--palm) 0.75turn 1turn
  );
}

.page-about .team-ring::after {
  content: "";
  position: absolute;
  inset: 24%;
  border-radius: 50%;
  background: var(--ink-deep);
  box-shadow: inset 0 0 0 1px var(--hair);
}

.page-about .team-ring-core {
  position: relative;
  z-index: 1;
  text-align: center;
  font-family: var(--font-mono);
  color: var(--coco);
}

.page-about .team-ring-core strong {
  display: block;
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}

.page-about .team-ring-core small {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .team-legend {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .team-legend li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex: 0 0 auto;
}

.page-about .swatch-felt {
  background: var(--felt);
}

.page-about .swatch-chip {
  background: var(--chip);
}

.page-about .swatch-palm {
  background: var(--palm);
}

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

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

.page-about .team-roles li {
  padding: 14px 16px;
  border-left: 2px solid var(--felt);
  background: rgba(12, 43, 54, 0.72);
  border-radius: 0 12px 0 0;
}

.page-about .team-roles strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--chip);
  margin-bottom: 4px;
}

.page-about .team-roles span {
  display: block;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(253, 248, 238, 0.82);
}

.page-about .team-media {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
}

.page-about .team-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 2px 20px 2px 2px;
  border: 1px solid var(--hair);
}

.page-about .team-media figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.page-about .partner-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(24px, 4vw, 40px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--hair);
}

.page-about .partner-cell {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 14px;
  padding: 16px 18px;
  background: linear-gradient(140deg, rgba(20, 107, 74, 0.3), rgba(7, 26, 36, 0.6));
  border-radius: 2px 16px 2px 2px;
  border: 1px solid var(--hair);
}

.page-about .partner-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 4.4vw, 38px);
  line-height: 1;
  color: var(--chip);
}

.page-about .partner-cell p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(253, 248, 238, 0.82);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-rhythm {
  background: linear-gradient(180deg, var(--ink-night), #092028);
  padding-block: var(--about-pass);
}

.page-about .rhythm-inner {
  width: var(--about-inner);
  margin-inline: auto;
}

.page-about .rhythm-inner .section-title {
  margin-bottom: 10px;
}

.page-about .rhythm-lead {
  max-width: 58ch;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .rhythm-list {
  list-style: none;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .rhythm-item {
  position: relative;
  padding: 20px 16px 4px 0;
  border-top: 2px solid var(--about-line);
}

.page-about .rhythm-item::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--lamp);
  box-shadow: 0 0 0 4px rgba(233, 180, 76, 0.16);
}

.page-about .rhythm-when {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--paper);
  margin-bottom: 6px;
}

.page-about .rhythm-item p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(253, 248, 238, 0.78);
}

.page-about .rhythm-note {
  margin-top: clamp(18px, 2.6vw, 26px);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--palm);
  max-width: 66ch;
}

/* ---------- 继续翻 ---------- */
.page-about .about-next {
  width: var(--about-inner);
  margin-inline: auto;
  padding-block: var(--about-pass);
}

.page-about .about-next .section-title {
  margin-bottom: 4px;
}

.page-about .next-list {
  list-style: none;
  margin: clamp(22px, 3.2vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .next-list > li {
  min-width: 0;
}

.page-about .next-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  height: 100%;
  padding: 20px 18px;
  text-decoration: none;
  color: var(--coco);
  background: rgba(12, 43, 54, 0.72);
  border: 1px solid var(--hair);
  border-radius: 2px 16px 2px 2px;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  border-color: var(--chip);
  background: rgba(20, 107, 74, 0.28);
  transform: translateY(-2px);
}

.page-about .next-kicker {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--palm);
}

.page-about .next-card strong {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--coco);
}

.page-about .next-go {
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--chip);
}

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: end;
  }

  .page-about h1 {
    transform: scaleX(1.015);
    transform-origin: left center;
  }

  .page-about .paper-head {
    grid-template-columns: minmax(0, 8fr) minmax(0, 3fr);
  }

  .page-about .about-seal {
    justify-self: end;
  }

  .page-about .proof-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .proof-step:nth-child(2) {
    transform: translateY(16px);
  }

  .page-about .proof-step:nth-child(3) {
    transform: translateY(-8px);
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .team-ring {
    margin-inline: 0;
  }

  .page-about .rhythm-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 1024px) {
  .page-about .timeline-layout {
    grid-template-columns: 196px minmax(0, 1fr);
    align-items: start;
    gap: clamp(28px, 4vw, 52px);
  }

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

  .page-about .rail-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--hair);
  }

  .page-about .rail-list > li {
    flex: 1 1 auto;
    min-width: 0;
  }

  .page-about .rail-link {
    clip-path: none;
    background: transparent;
    padding: 0 12px;
    border-left: 2px solid transparent;
    margin-left: -1px;
    white-space: normal;
  }

  .page-about .rail-link:hover,
  .page-about .rail-link:focus-visible {
    background: rgba(244, 232, 208, 0.08);
    color: var(--paper);
    border-left-color: var(--chip);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .version-card,
  .page-about .next-card,
  .page-about .disclose-icon,
  .page-about .filter-btn,
  .page-about .rail-link {
    transition: none;
  }

  .page-about .version-card:hover,
  .page-about .version-card:focus-within,
  .page-about .next-card:hover,
  .page-about .proof-step:nth-child(2),
  .page-about .proof-step:nth-child(3) {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>
<<<END>>>