.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  --about-rule: rgba(27, 42, 74, 0.14);
  --about-soft: rgba(0, 194, 168, 0.1);
}

.page-about a {
  color: inherit;
}

.page-about .about-bar {
  border-bottom: 1px solid var(--about-rule);
  background: var(--paper);
}

.page-about .about-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  min-height: 54px;
  padding-block: 10px;
}

.page-about .about-bar__code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--stone);
}

/* 首屏 */
.page-about .about-hero {
  padding-block: clamp(24px, 4vw, 48px) 0;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 28px;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(32px, 7.4vw, 72px);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.04;
  max-width: 16em;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 42em;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.75;
  color: var(--stone);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about .about-toc {
  border: 1px solid rgba(27, 42, 74, 0.38);
  background: var(--white);
  padding: 12px 14px;
}

.page-about .about-toc__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--stone);
}

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

.page-about .about-toc__list li {
  flex: 0 0 auto;
}

.page-about .about-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  border: 1px solid transparent;
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-toc__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange);
}

.page-about .about-toc__link:hover {
  border-color: var(--about-rule);
}

.page-about .about-toc__link[aria-current="true"] {
  border-color: var(--cyan);
  background: var(--about-soft);
}

.page-about .about-hero__figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

.page-about .about-shot {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--about-rule);
  background: var(--paper-deep);
}

.page-about .about-shot--wide {
  aspect-ratio: 16 / 9;
}

.page-about .about-shot--honor {
  aspect-ratio: 10 / 7;
}

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

.page-about .media__stamp {
  position: absolute;
  right: 0;
  bottom: 0;
  padding: 6px 10px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.page-about .figure__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--stone);
}

/* 章节通用 */
.page-about .about-section {
  padding-block: clamp(44px, 6.5vw, 88px);
  border-top: 1px solid var(--about-rule);
}

.page-about .section-head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(22px, 3.5vw, 40px);
  padding-left: 16px;
  border-left: 3px solid var(--orange);
}

.page-about .section-head__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .section-head__title {
  margin: 0;
  font-size: clamp(24px, 4vw, 40px);
  letter-spacing: -0.03em;
  line-height: 1.12;
}

.page-about .section-head__note {
  margin: 2px 0 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.7;
  color: var(--stone);
}

/* 品牌起点 */
.page-about .about-origin__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-origin__head {
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .about-origin__head h2 {
  margin: 0;
  font-size: clamp(24px, 4vw, 38px);
  letter-spacing: -0.03em;
  line-height: 1.14;
}

.page-about .about-origin__body p {
  margin: 0 0 16px;
  color: var(--ink);
}

.page-about .about-origin__body p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-origin__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--about-rule);
  display: grid;
  gap: 12px;
}

.page-about .about-origin__list li {
  position: relative;
  padding-left: 22px;
  font-size: 16px;
  line-height: 1.7;
}

.page-about .about-origin__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 2px;
  background: var(--cyan);
}

/* 时间线 */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  display: grid;
  gap: 18px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: rgba(27, 42, 74, 0.38);
}

.page-about .about-timeline__item {
  position: relative;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 14px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--paper);
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4.6vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 8px;
}

.page-about .about-timeline__card {
  background: var(--white);
  border: 1px solid var(--about-rule);
  box-shadow: var(--shadow);
  padding: 16px 16px 18px;
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-timeline__card:hover {
  border-color: var(--orange);
  box-shadow: var(--shadow-lift);
}

.page-about .about-timeline__card .panel__head {
  display: grid;
  gap: 6px;
}

.page-about .about-timeline__card .panel__title {
  margin: 0;
  font-size: 18px;
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.page-about .about-timeline__card .panel__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--stone);
}

.page-about .about-timeline__card .panel__body p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

/* 团队 */
.page-about .about-team__figure {
  margin: 0 0 clamp(22px, 3.5vw, 34px);
}

.page-about .about-team__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-team__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--white);
  border: 1px solid var(--about-rule);
  padding: 20px 18px 22px;
  box-shadow: var(--shadow);
  transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-team__card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--cyan);
}

.page-about .about-team__card--orange::before {
  background: var(--orange);
}

.page-about .about-team__card--moss::before {
  background: var(--moss);
}

.page-about .about-team__card--clay::before {
  background: var(--clay);
}

.page-about .about-team__card:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-about .about-team__title {
  margin: 0;
  font-size: 19px;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.page-about .about-team__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-team__text {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
}

.page-about .about-team__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

/* 规模 */
.page-about .about-scale__board {
  display: grid;
  gap: 26px;
  padding: clamp(20px, 4vw, 40px);
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink-deep);
}

.page-about .about-scale__ring {
  display: grid;
  gap: 14px;
  justify-items: center;
  text-align: center;
}

.page-about .about-ring {
  position: relative;
  width: 150px;
  height: 150px;
}

.page-about .about-ring svg {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .about-ring__track {
  fill: none;
  stroke: rgba(247, 244, 236, 0.18);
  stroke-width: 10;
}

.page-about .about-ring__value {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 10;
  stroke-dasharray: 265.4 276.5;
}

.page-about .about-ring__figure {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-ring__figure small {
  font-size: 15px;
  margin-left: 2px;
  color: var(--cyan-soft);
}

.page-about .about-scale__caption {
  margin: 0;
  max-width: 24em;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(247, 244, 236, 0.72);
}

.page-about .about-scale__list {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
}

.page-about .about-scale__item {
  padding-top: 14px;
  border-top: 1px solid rgba(247, 244, 236, 0.16);
}

.page-about .about-scale__item dt {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan-soft);
}

.page-about .about-scale__item dd {
  margin: 4px 0 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-scale__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-scale__item dd small {
  font-size: 13px;
  color: rgba(247, 244, 236, 0.72);
}

.page-about .about-scale__item p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(247, 244, 236, 0.78);
}

/* 合作与荣誉 */
.page-about .about-partners__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-partners__lede {
  margin: 0 0 22px;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-partners__tabs .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .about-partners__tabs .tabs__tab {
  appearance: none;
  border: 1px solid var(--about-rule);
  background: var(--white);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 8px 14px;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-partners__tabs .tabs__tab:hover {
  border-color: var(--ink);
}

.page-about .about-partners__tabs .tabs__tab[aria-selected="true"] {
  border-color: var(--cyan);
  background: var(--about-soft);
}

.page-about .about-partners__tabs .tabs__tab:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

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

.page-about .about-partners__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-partners__note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--stone);
}

.page-about .about-honor__figure {
  margin: 0 0 16px;
}

.page-about .about-honor__list {
  display: grid;
  gap: 12px;
}

.page-about .about-honor__card {
  border: 1px solid var(--about-rule);
  border-left: 3px solid var(--clay);
  background: var(--paper-deep);
  padding: 14px 16px;
}

.page-about .about-honor__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--clay);
}

.page-about .about-honor__name {
  margin: 6px 0 0;
  font-size: 17px;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.page-about .about-honor__text {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
}

/* 承诺与联系 */
.page-about .about-commitment__grid {
  display: grid;
  gap: 26px;
}

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

.page-about .about-commitment__list li {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-commitment__list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-commitment__title {
  margin: 0;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.page-about .about-commitment__list p {
  margin: 6px 0 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--stone);
}

.page-about .about-commitment__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-commitment__contact {
  border: 1px solid var(--ink);
  background: var(--white);
  padding: 20px 18px;
}

.page-about .about-commitment__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-about .about-contact {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-contact__row {
  display: grid;
  gap: 2px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--about-rule);
}

.page-about .about-contact__row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-contact__row dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--stone);
}

.page-about .about-contact__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  word-break: break-word;
}

.page-about .about-commitment__more {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--about-rule);
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
}

.page-about .about-commitment__more a {
  color: var(--ink);
  border-bottom: 1px solid var(--cyan);
  text-decoration: none;
}

.page-about .about-commitment__more a:hover {
  color: var(--cyan);
}

/* 桌面布局 */
@media (min-width: 720px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1fr) 232px;
    align-items: start;
    gap: 48px;
  }

  .page-about .about-toc {
    position: sticky;
    top: 88px;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    overflow: visible;
  }

  .page-about .about-toc__link {
    width: 100%;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-origin__head {
    position: sticky;
    top: 96px;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .about-timeline__item:nth-child(even) {
    margin-left: 7%;
  }

  .page-about .about-timeline__year {
    margin-bottom: 0;
    padding-top: 12px;
    text-align: right;
  }

  .page-about .about-timeline__item::before {
    top: 20px;
  }

  .page-about .about-scale__board {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 36px;
    align-items: center;
  }

  .page-about .about-partners__grid {
    grid-template-columns: 7fr 5fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .about-commitment__grid {
    grid-template-columns: 7fr 5fr;
    gap: 40px;
    align-items: start;
  }
}

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

  .page-about .about-scale__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__card,
  .page-about .about-timeline__card,
  .page-about .about-toc__link {
    transition: none;
  }

  .page-about .about-team__card:hover {
    transform: none;
  }
}