/* ==========================================================
   品牌价值页 · 作用域：.page-about
   ========================================================== */

.page-about {
  --about-cut: 12px;
  --about-panel-cut: 22px;
  background: var(--deep);
  color: var(--mist);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-about .about-inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 通用按钮（页面内兜底） ---------- */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.3;
  text-decoration: none;
  cursor: pointer;
  transition: transform .2s var(--ease), background-color .2s var(--ease),
              border-color .2s var(--ease), color .2s var(--ease);
}
.page-about .btn-primary {
  background: var(--orange);
  color: var(--deep);
}
.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background: #ff8347;
  transform: translateY(-2px);
}
.page-about .btn-ghost {
  background: transparent;
  color: var(--mist);
  border-color: rgba(201, 211, 224, 0.42);
}
.page-about .btn-ghost:hover,
.page-about .btn-ghost:focus-visible {
  color: var(--orange);
  border-color: var(--orange);
  transform: translateY(-2px);
}
.page-about .btn:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  margin-bottom: clamp(16px, 2.4vw, 26px);
}
.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--stone);
}
.page-about .breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: rgba(201, 211, 224, 0.42);
}
.page-about .breadcrumb-link {
  color: var(--stone);
  text-decoration: none;
  transition: color .2s var(--ease);
}
.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  color: var(--orange);
}
.page-about .breadcrumb-current {
  color: var(--mist);
}

/* ==========================================================
   首屏
   ========================================================== */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(22px, 3.4vw, 44px) clamp(34px, 5vw, 68px);
  overflow: clip;
}
.page-about .about-hero__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(56% 68% at 84% 4%, rgba(46, 139, 255, 0.20), transparent 66%),
    radial-gradient(46% 58% at 4% 92%, rgba(255, 106, 43, 0.14), transparent 64%);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
}

.page-about .about-hero__body {
  position: relative;
  z-index: 2;
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--teal);
}
.page-about .about-hero__kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--orange);
}

.page-about h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lede {
  margin: 0 0 26px;
  max-width: 48ch;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.78;
  color: var(--stone);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 26px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
.page-about .about-stat {
  background: var(--deep);
  padding: 14px 16px;
}
.page-about .about-stat__label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--stone);
}
.page-about .about-stat__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--mist);
}

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

.page-about .about-hero__media {
  position: relative;
  z-index: 1;
  margin: 0;
  min-height: 240px;
  overflow: hidden;
  background: var(--deck);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 46px), 0 100%);
}
.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 240px;
  max-height: 560px;
  object-fit: cover;
}
.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(152deg, rgba(10, 27, 51, 0.62) 0%, rgba(10, 27, 51, 0.04) 50%, rgba(10, 27, 51, 0.78) 100%);
  pointer-events: none;
}
.page-about .about-hero__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 8px 14px;
  background: var(--orange);
  color: var(--deep);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .12em;
}

/* ==========================================================
   主体两栏：左索引 + 右正文
   ========================================================== */
.page-about .about-layout {
  display: grid;
  gap: 0;
  padding-bottom: clamp(40px, 6vw, 88px);
}

.page-about .about-index {
  position: sticky;
  top: var(--header-h);
  z-index: 8;
  margin-bottom: clamp(18px, 3vw, 30px);
  padding-block: 9px;
  background: rgba(10, 27, 51, 0.94);
  border-bottom: 1px solid var(--line-dark);
  backdrop-filter: blur(10px);
}
.page-about .about-index__label {
  display: none;
}
.page-about .about-index__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}
.page-about .about-index__item {
  flex: 0 0 auto;
}
.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 11px;
  border: 1px solid transparent;
  color: var(--stone);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--mist);
  border-color: rgba(255, 106, 43, 0.65);
  background: rgba(255, 106, 43, 0.1);
}
.page-about .about-index__link:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}
.page-about .about-index__num {
  color: var(--orange);
  font-weight: 600;
}

/* ---------- 章节 ---------- */
.page-about .about-body {
  min-width: 0;
}

.page-about .about-chapter {
  padding-block: clamp(32px, 5.2vw, 64px);
  border-top: 1px solid var(--line-dark);
}
.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: clamp(20px, 3vw, 34px);
}

.page-about .about-chapter__head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .index-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--teal);
}

.page-about .about-chapter__title {
  margin: 0;
  max-width: 26ch;
  font-size: clamp(23px, 3.3vw, 37px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .about-prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--stone);
}
.page-about .about-prose p {
  margin: 0 0 1.15em;
}
.page-about .about-prose p:last-child {
  margin-bottom: 0;
}
.page-about .about-prose strong {
  color: var(--mist);
  font-weight: 600;
}

/* ---------- 指标块 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: clamp(22px, 3vw, 34px);
}
.page-about .about-metric {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--deck);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
  transition: transform .2s var(--ease), background-color .2s var(--ease);
}
.page-about .about-metric::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 2px;
  background: var(--orange);
}
.page-about .about-metric:hover {
  transform: translateY(-4px);
  background: #17396a;
}
.page-about .about-metric__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--mist);
}
.page-about .about-metric__unit {
  margin-left: 4px;
  font-size: .38em;
  letter-spacing: .04em;
  color: var(--orange);
}
.page-about .about-metric__label {
  display: block;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 四条数据链路 ---------- */
.page-about .about-chain {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}
.page-about .about-chain__item {
  position: relative;
  padding: 20px 0 20px 24px;
  border-left: 2px solid rgba(46, 139, 255, 0.3);
}
.page-about .about-chain__item:first-child {
  padding-top: 6px;
}
.page-about .about-chain__item:last-child {
  padding-bottom: 6px;
}
.page-about .about-chain__name {
  margin: 0 0 8px;
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--mist);
}
.page-about .about-chain__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--stone);
}
.page-about .about-chain__more {
  margin-top: 12px;
}
.page-about .about-chain__more summary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--blue);
  border-bottom: 1px dashed rgba(46, 139, 255, 0.5);
  cursor: pointer;
  list-style: none;
}
.page-about .about-chain__more summary::-webkit-details-marker {
  display: none;
}
.page-about .about-chain__more summary::after {
  content: "+";
  font-size: 13px;
  line-height: 1;
}
.page-about .about-chain__more[open] summary::after {
  content: "−";
}
.page-about .about-chain__more summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}
.page-about .about-chain__more p {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 章节内插图 ---------- */
.page-about .about-inline-figure {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  max-width: 620px;
  overflow: hidden;
  border: 1px solid var(--line-dark);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  background: var(--deck);
}
.page-about .about-inline-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  opacity: .82;
}
.page-about .about-inline-figure figcaption {
  padding: 14px 18px 16px;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--stone);
  border-top: 1px solid var(--line-dark);
}

/* ==========================================================
   雾白色面板
   ========================================================== */
.page-about .about-chapter.about-light {
  margin-block: clamp(8px, 1.6vw, 18px);
  padding: clamp(26px, 4vw, 46px);
  border-top: 0;
  background: var(--mist);
  color: var(--graphite);
  clip-path: polygon(0 0, calc(100% - var(--about-panel-cut)) 0, 100% var(--about-panel-cut), 100% 100%, 0 100%);
}
.page-about .about-light .about-chapter__title {
  color: var(--graphite);
}
.page-about .about-light .index-label {
  color: #0b7c67;
}
.page-about .about-light .about-prose {
  color: #3b4859;
}
.page-about .about-light .about-prose strong {
  color: var(--graphite);
}

/* ---------- 校准刻度尺 ---------- */
.page-about .about-scale {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-scale__cell {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  height: 62px;
  padding: 8px 4px;
  background: rgba(18, 48, 90, 0.07);
  border-bottom: 3px solid rgba(18, 48, 90, 0.22);
  font-family: var(--font-mono);
  font-size: 12px;
  color: #5b6b80;
  transition: transform .18s var(--ease), border-color .18s var(--ease),
              background-color .18s var(--ease), color .18s var(--ease);
}
.page-about .about-scale__cell:hover {
  transform: translateY(-4px);
  background: rgba(255, 106, 43, 0.14);
  border-bottom-color: var(--orange);
  color: var(--graphite);
}
.page-about .about-scale__cell--current {
  background: var(--deep);
  border-bottom-color: var(--orange);
  color: var(--mist);
  font-weight: 600;
}
.page-about .about-scale__cell--current:hover {
  background: var(--deep);
  color: var(--mist);
}
.page-about .about-scale__num {
  line-height: 1;
}
.page-about .about-scale__note {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.7;
  color: #5b6b80;
}

/* ---------- 团队卡片 ---------- */
.page-about .about-teams {
  display: grid;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}
.page-about .about-team {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--deck);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
  transition: transform .2s var(--ease), background-color .2s var(--ease);
}
.page-about .about-team:hover {
  transform: translateY(-4px);
  background: #17396a;
}
.page-about .about-team__idx {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--teal);
}
.page-about .about-team__name {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--mist);
}
.page-about .about-team__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--stone);
}

/* ---------- 三段节奏 ---------- */
.page-about .about-rhythm {
  display: grid;
  gap: 1px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
.page-about .about-rhythm__step {
  padding: 20px 18px 22px;
  background: var(--deep);
}
.page-about .about-rhythm__idx {
  display: block;
  margin-bottom: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--orange);
}
.page-about .about-rhythm__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--mist);
}
.page-about .about-rhythm__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  position: relative;
  margin-top: clamp(22px, 3vw, 32px);
  overflow: hidden;
  background: var(--deck);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}
.page-about .about-eco__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
  filter: grayscale(.25) contrast(1.08);
}
.page-about .about-eco::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(118deg, rgba(10, 27, 51, 0.94) 0%, rgba(18, 48, 90, 0.82) 58%, rgba(10, 27, 51, 0.9) 100%);
  pointer-events: none;
}
.page-about .about-eco__body {
  position: relative;
  z-index: 2;
  padding: clamp(24px, 4vw, 46px);
}
.page-about .about-eco__lede {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--stone);
}
.page-about .about-eco__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  background: rgba(201, 211, 224, 0.2);
  border: 1px solid rgba(201, 211, 224, 0.2);
}
.page-about .about-eco__stat {
  padding: 18px 18px 20px;
  background: rgba(10, 27, 51, 0.72);
}
.page-about .about-eco__cap {
  margin: 0 0 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--stone);
}
.page-about .about-eco__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--mist);
}
.page-about .about-eco__num span {
  margin-left: 4px;
  font-size: .4em;
  color: var(--orange);
}
.page-about .about-eco__honors {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  padding: 0;
  list-style: none;
}
.page-about .tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid rgba(232, 163, 61, 0.55);
  border-radius: 999px;
  background: linear-gradient(100deg, rgba(232, 163, 61, 0.18), rgba(255, 208, 138, 0.08));
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--amber-light);
}
.page-about .about-eco__more {
  margin: 0;
}
.page-about .about-eco__more a {
  display: inline-block;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 106, 43, 0.45);
  padding-bottom: 2px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-about .about-eco__more a:hover,
.page-about .about-eco__more a:focus-visible {
  color: var(--amber-light);
  border-color: var(--amber-light);
}
.page-about .about-eco__more a:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

/* ---------- 服务准则 ---------- */
.page-about .about-rules {
  counter-reset: rule;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(16, 24, 38, 0.16);
}
.page-about .about-rules__item {
  counter-increment: rule;
  position: relative;
  padding: 18px 8px 18px 50px;
  font-size: 15.5px;
  line-height: 1.78;
  color: #33415a;
  border-bottom: 1px solid rgba(16, 24, 38, 0.12);
}
.page-about .about-rules__item::before {
  content: "0" counter(rule);
  position: absolute;
  left: 0;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--orange);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  position: relative;
  margin-top: clamp(36px, 5.5vw, 72px);
  padding: clamp(28px, 4.6vw, 56px) 0;
  border-top: 1px solid var(--line-dark);
  overflow: clip;
}
.page-about .about-cta::before {
  content: "";
  position: absolute;
  inset: -60% -12% auto auto;
  width: 58%;
  height: 220%;
  pointer-events: none;
  background: radial-gradient(circle at 58% 42%, rgba(255, 106, 43, 0.22), transparent 62%),
              radial-gradient(circle at 20% 70%, rgba(23, 195, 162, 0.14), transparent 60%);
}
.page-about .about-cta__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  align-items: center;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.page-about .about-cta__title {
  margin: 0 0 12px;
  font-size: clamp(23px, 3.2vw, 36px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: -0.02em;
}
.page-about .about-cta__text {
  margin: 0;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--stone);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 滚动进入 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ==========================================================
   断点
   ========================================================== */
@media (min-width: 720px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-teams {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-scale {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
  .page-about .about-rhythm {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-chain {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 26px;
    border-top: 2px solid rgba(46, 139, 255, 0.3);
  }
  .page-about .about-chain__item {
    padding: 34px 0 0;
    border-left: 0;
  }
  .page-about .about-chain__item:first-child,
  .page-about .about-chain__item:last-child {
    padding-top: 34px;
    padding-bottom: 0;
  }
  .page-about .about-chain__item::before {
    content: "";
    position: absolute;
    top: -7px;
    left: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--teal);
    box-shadow: 0 0 0 5px rgba(23, 195, 162, 0.16);
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: stretch;
  }
  .page-about .about-hero__media {
    grid-column: 1;
    grid-row: 1;
  }
  .page-about .about-hero__body {
    grid-column: 2;
    grid-row: 1;
    padding-top: 6px;
  }
  .page-about .about-hero__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    column-gap: clamp(30px, 3.8vw, 62px);
    align-items: start;
  }
  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 34px);
    z-index: 1;
    margin-bottom: 0;
    padding-block: 0;
    padding-left: 18px;
    background: none;
    border-bottom: 0;
    border-left: 1px solid var(--line-dark);
    backdrop-filter: none;
  }
  .page-about .about-index__label {
    display: block;
    margin: 0 0 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .14em;
    color: var(--teal);
  }
  .page-about .about-index__list {
    flex-direction: column;
    gap: 3px;
    overflow: visible;
  }
  .page-about .about-index__link {
    display: flex;
    width: 100%;
    padding: 8px 10px;
    white-space: normal;
    font-size: 12.5px;
  }
  .page-about .about-chapter:first-child {
    padding-top: 0;
  }
}

@media (min-width: 1120px) {
  .page-about .about-cta__inner {
    grid-template-columns: 1fr auto;
  }
}

/* ==========================================================
   动效降级
   ========================================================== */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .page-about .about-metric:hover,
  .page-about .about-team:hover,
  .page-about .about-scale__cell:hover,
  .page-about .btn:hover {
    transform: none;
  }
}