.page-about {
  --about-sticky-top: calc(var(--header-h) + 28px);
  background: var(--ink);
  color: var(--mist);
  padding-bottom: clamp(56px, 9vw, 104px);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: end;
  padding-block: clamp(18px, 3vw, 30px) clamp(40px, 6vw, 72px);
}

.page-about .about-h1 {
  margin: 0.34em 0 0;
  font-weight: 900;
  font-size: clamp(34px, 7.2vw, 74px);
  line-height: 0.96;
  letter-spacing: -0.022em;
  color: var(--mist);
}

.page-about .about-h1 em {
  font-style: normal;
  color: var(--lime);
}

.page-about .about-hero .lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 34em;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.62;
  color: rgba(242, 245, 240, 0.84);
}

.page-about .about-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 3.4vw, 44px);
  margin-top: clamp(24px, 3.6vw, 38px);
  padding-top: clamp(16px, 2.4vw, 24px);
  border-top: 1px solid var(--line);
}

.page-about .fact {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .fact-num {
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .fact-label {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--sage);
}

.page-about .about-hero-media {
  position: relative;
  aspect-ratio: 10 / 14;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--ink-2);
}

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.78fr);
  }

  .page-about .about-hero-media {
    transform: translateY(-6px);
  }
}

/* ---------- 叙事主体：左索引 + 右正文 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  padding-top: clamp(8px, 2vw, 20px);
}

.page-about .index-label {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--sage);
}

.page-about .index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 14px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid var(--line);
}

.page-about .index-list::-webkit-scrollbar {
  display: none;
}

.page-about .index-list a {
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  white-space: nowrap;
  font-size: 14px;
  line-height: 1.3;
  color: var(--sage);
  text-decoration: none;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .index-list a:hover,
.page-about .index-list a:focus-visible {
  color: var(--lime-soft);
  border-color: var(--line-strong);
}

.page-about .index-list .idx {
  font-size: 12px;
  color: var(--lime);
  opacity: 0.7;
  flex: none;
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 76px);
  }

  .page-about .about-index {
    position: sticky;
    top: var(--about-sticky-top);
    align-self: start;
  }

  .page-about .index-list {
    display: grid;
    gap: 2px;
    padding-bottom: 0;
    border-bottom: 0;
    overflow: visible;
  }

  .page-about .index-list a {
    padding: 7px 10px 7px 0;
    border: 0;
    border-radius: 0;
    white-space: normal;
  }
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding-block: clamp(30px, 5vw, 54px);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .sec-index {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-about .about-section h2 {
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.014em;
  color: var(--mist);
  font-size: clamp(25px, 3.6vw, 34px);
}

.page-about .sec-02 h2 { font-size: clamp(26px, 3.9vw, 37px); }
.page-about .sec-03 h2 { font-size: clamp(27px, 4.2vw, 40px); }
.page-about .sec-04 h2 { font-size: clamp(28px, 4.6vw, 44px); }
.page-about .sec-05 h2 { font-size: clamp(29px, 5vw, 48px); }
.page-about .sec-06 h2 { font-size: clamp(30px, 5.4vw, 52px); }
.page-about .sec-07 h2 { font-size: clamp(31px, 5.8vw, 56px); }

.page-about .about-section p {
  margin: 0 0 1em;
  max-width: 40em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.64;
  color: rgba(242, 245, 240, 0.86);
}

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

.page-about .about-section a {
  color: var(--lime-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-section a:hover {
  color: var(--lime);
}

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

.page-about .about-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
  padding: 18px 20px;
  border-radius: var(--radius-lg);
  background: var(--ink-2);
}

.page-about .step-mark {
  padding-top: 4px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--lime);
  white-space: nowrap;
}

.page-about .about-steps p {
  margin: 0;
  max-width: none;
  font-size: 15px;
  line-height: 1.6;
}

@media (min-width: 760px) {
  .page-about .about-steps {
    grid-template-columns: 1fr 1fr;
    gap: 14px 20px;
  }
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(22px, 3.6vw, 34px) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
  aspect-ratio: 14 / 9;
}

.page-about .about-figure--side img {
  aspect-ratio: 3 / 2;
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--sage);
}

@media (min-width: 900px) {
  .page-about .about-figure--side {
    max-width: 78%;
  }
}

/* ---------- 团队比例 ---------- */
.page-about .about-ratio {
  display: flex;
  height: 22px;
  margin: clamp(16px, 2.6vw, 24px) 0 clamp(18px, 3vw, 26px);
  border-radius: var(--pill);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .ratio-seg {
  height: 100%;
}

.page-about .ratio-seg--edit { width: 55.3%; background: var(--lime); }
.page-about .ratio-seg--prod { width: 28.9%; background: var(--orange); }
.page-about .ratio-seg--vis { width: 15.8%; background: var(--sage); }

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

.page-about .role-head {
  display: flex;
  align-items: baseline;
  gap: 9px;
  margin-bottom: 6px;
}

.page-about .role-num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .role-name {
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-roles p {
  margin: 0;
  max-width: 30em;
  font-size: 14px;
  line-height: 1.6;
  color: var(--sage);
}

@media (min-width: 760px) {
  .page-about .about-roles {
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
  }
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin-top: clamp(18px, 3vw, 28px);
  padding-left: 30px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--lime), var(--orange));
  opacity: 0.5;
}

.page-about .era + .era {
  margin-top: 4px;
}

.page-about .era-head {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 12px 0;
  list-style: none;
  cursor: pointer;
}

.page-about .era-head::-webkit-details-marker {
  display: none;
}

.page-about .era-dot {
  position: absolute;
  left: -30px;
  top: 18px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 255, 61, 0.12);
}

.page-about .era-year {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .era-name {
  font-size: clamp(15px, 1.7vw, 18px);
  font-weight: 700;
  color: var(--mist);
}

.page-about .era-caret {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 18px;
  line-height: 1;
  color: var(--sage);
}

.page-about .era-caret::before {
  content: "+";
}

.page-about .era[open] .era-caret::before {
  content: "\2212";
}

.page-about .era-head:hover .era-caret {
  color: var(--lime-soft);
}

.page-about .era-body {
  padding: 2px 0 16px;
}

.page-about .era-body p {
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.64;
  color: rgba(242, 245, 240, 0.78);
}

.page-about .era--current .era-dot {
  background: var(--orange);
  animation: aboutPulse 2.4s var(--ease) infinite;
}

.page-about .era--current .era-year {
  color: var(--orange);
}

@keyframes aboutPulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(255, 122, 46, 0.18); }
  50% { box-shadow: 0 0 0 10px rgba(255, 122, 46, 0.04); }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .era--current .era-dot {
    animation: none;
  }
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-facts {
  display: grid;
  gap: 16px;
  margin: clamp(18px, 3vw, 28px) 0 0;
}

.page-about .about-facts div {
  padding-top: 12px;
  border-top: 2px solid rgba(200, 255, 61, 0.28);
}

.page-about .about-facts dt {
  margin-bottom: 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lime);
}

.page-about .about-facts dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: rgba(242, 245, 240, 0.82);
}

@media (min-width: 760px) {
  .page-about .about-facts {
    grid-template-columns: 1fr 1fr;
    gap: 22px 32px;
  }
}

/* ---------- 行业认可：纸白反色 ---------- */
.page-about .about-band {
  margin-block: clamp(10px, 2vw, 20px);
  padding: clamp(26px, 5vw, 54px);
  border-radius: var(--radius-xl);
  background: var(--paper);
  color: var(--ink);
}

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

.page-about .about-band p {
  color: rgba(10, 31, 26, 0.8);
  max-width: 34em;
}

.page-about .award-list {
  display: grid;
  gap: 10px;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .award {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: 15px 20px;
  border-radius: var(--radius-md);
  background: rgba(10, 31, 26, 0.06);
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}

.page-about .award:hover {
  background: var(--ink);
  color: var(--mist);
}

.page-about .award-year {
  font-size: 15px;
  font-weight: 700;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
  transition: color 0.3s var(--ease);
}

.page-about .award:hover .award-year {
  color: var(--lime);
}

.page-about .award-name {
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.45;
}

.page-about .about-band .award-note {
  margin-top: clamp(20px, 3vw, 28px);
  font-size: 15px;
  color: rgba(10, 31, 26, 0.72);
  max-width: 32em;
}

/* ---------- 合作方向 ---------- */
.page-about .about-coop {
  display: grid;
  gap: 16px;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-coop li {
  padding-left: 16px;
  border-left: 2px solid var(--line-strong);
}

.page-about .about-coop h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--lime-soft);
}

.page-about .about-coop p {
  margin: 0;
  max-width: none;
  font-size: 14px;
  line-height: 1.6;
  color: var(--sage);
}

.page-about .about-coop-note {
  margin-top: clamp(18px, 3vw, 26px);
  font-size: 15px;
  color: var(--sage);
}

.page-about .about-coop-note a {
  color: var(--lime-soft);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.6vw, 32px);
}

@media (min-width: 820px) {
  .page-about .about-coop {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
}
<<<END>>>