.page-about {
  --about-gap: clamp(20px, 3vw, 34px);
  --about-block: clamp(52px, 8vw, 96px);
  background: var(--arena);
  color: var(--fog);
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-deep);
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--fog);
  border-bottom-color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(20px, 4vw, 36px) clamp(40px, 6vw, 72px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 18px;
  padding-top: clamp(28px, 6vw, 64px);
}

.page-about .about-hero__kicker {
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--cyan);
  text-transform: uppercase;
  margin: 0;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 6.4vw, 68px);
  line-height: 1.06;
  letter-spacing: 0.01em;
  margin: 0;
  max-width: 20em;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 66ch;
  font-size: clamp(16px, 1.9vw, 18.5px);
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

/* ---------- 页内目录 ---------- */
.page-about .about-index {
  border-block: 1px solid var(--hairline);
  background: var(--carbon);
}

.page-about .about-index__list {
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__list > li {
  flex: 0 0 auto;
  border-right: 1px solid var(--hairline);
}

.page-about .about-index__list > li:first-child {
  border-left: 1px solid var(--hairline);
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 18px;
  color: var(--silver);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--fast) var(--ease), background-color var(--fast) var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--fog);
  background: var(--cyan-wash);
}

.page-about .about-index__num {
  font-size: 12px;
  color: var(--cyan);
}

/* ---------- 数字面板 ---------- */
.page-about .about-stats {
  position: relative;
  z-index: 2;
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .about-stats__inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--hairline);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.page-about .about-stats__item {
  background: var(--panel);
  padding: 18px 16px 16px;
}

.page-about .about-stats__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.1;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* ---------- 区块通用 ---------- */
.page-about .about-section {
  padding-block: var(--about-block);
  border-top: 1px solid var(--hairline);
}

.page-about .about-section .section-head {
  margin-bottom: clamp(22px, 3.4vw, 38px);
}

.page-about .about-section .section-head__label {
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.2em;
  margin: 0 0 8px;
}

.page-about .about-section .section-head__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.24;
  margin: 0;
  max-width: 26em;
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-origin__body p {
  margin: 0 0 1.05em;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-origin__body > p:first-child::first-letter {
  float: left;
  font-family: var(--font-display);
  font-size: 3em;
  line-height: 0.92;
  padding-right: 10px;
  color: var(--cyan);
}

.page-about .about-origin__figure {
  margin: clamp(22px, 3vw, 32px) 0 0;
}

.page-about .about-module-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hairline);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.page-about .about-module-list__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  padding: 16px 18px;
  background: var(--panel);
}

.page-about .about-module-list__num {
  grid-row: span 2;
  font-size: 12px;
  color: var(--cyan);
  padding-top: 3px;
}

.page-about .about-module-list__name {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--fog);
}

.page-about .about-module-list__text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4.4vw, 52px);
  border: 1px solid var(--hairline-strong);
  background: var(--carbon);
}

.page-about .about-coverage__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-coverage__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.24;
  filter: saturate(0.55);
}

.page-about .about-coverage__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(118deg, var(--carbon) 8%, rgba(16, 20, 22, 0.62) 72%);
}

.page-about .about-coverage__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-coverage__lede {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(16px, 1.8vw, 18px);
  line-height: 1.8;
  color: var(--fog);
}

.page-about .about-taxonomy {
  list-style: none;
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hairline);
}

.page-about .about-taxonomy__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  padding: 18px 0;
  background: transparent;
}

.page-about .about-taxonomy__num {
  grid-row: span 2;
  font-size: 13px;
  color: var(--orange);
  padding-top: 2px;
}

.page-about .about-taxonomy__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--fog);
}

.page-about .about-taxonomy__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--silver);
}

/* ---------- 编辑流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hairline);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.page-about .about-flow__step {
  display: grid;
  gap: 10px;
  padding: clamp(20px, 3vw, 28px);
  background: var(--panel);
  border-left: 2px solid transparent;
  transition: border-color var(--slow) var(--ease), background-color var(--slow) var(--ease);
}

.page-about .about-flow__step:hover {
  border-left-color: var(--cyan);
  background: #1a2a24;
}

.page-about .about-flow__num {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-flow__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--fog);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(16px, 2.4vw, 24px);
}

.page-about .tab {
  appearance: none;
  cursor: pointer;
  padding: 10px 16px;
  font-family: var(--font-body);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--muted);
  background: var(--carbon);
  border: 1px solid var(--hairline-strong);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease), background-color var(--fast) var(--ease);
}

.page-about .tab:hover,
.page-about .tab:focus-visible {
  color: var(--fog);
  border-color: var(--cyan-deep);
}

.page-about .tab[aria-selected="true"] {
  color: var(--fog);
  background: var(--cyan-wash);
  border-color: var(--cyan);
}

.page-about .tab-panel {
  padding: 18px 20px;
  border-left: 2px solid var(--cyan-deep);
  background: var(--panel);
  margin-bottom: 1px;
}

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

.page-about .tab-panel p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-team__note {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--hairline);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-team__figure {
  margin: 0;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  display: grid;
  gap: clamp(18px, 3vw, 26px);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-deep), var(--hairline) 62%, transparent);
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  gap: 5px;
  padding-bottom: clamp(12px, 2vw, 18px);
  border-bottom: 1px solid var(--hairline);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--cyan);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(43, 224, 194, 0.12);
}

.page-about .about-timeline__num {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-timeline__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 23px);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--fog);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
  max-width: 62ch;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-partners__intro > p {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  font-size: 16px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-promise {
  padding: clamp(20px, 3vw, 30px);
  background: var(--carbon);
  border: 1px solid var(--hairline-strong);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.page-about .about-promise__label {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--orange);
}

.page-about .about-promise__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 24px);
  font-weight: 600;
  line-height: 1.35;
  color: var(--fog);
}

.page-about .about-promise__list {
  margin: 0 0 clamp(18px, 2.6vw, 24px);
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-promise__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--silver);
}

.page-about .about-promise__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
  transform: rotate(45deg);
}

/* ---------- 结尾 CTA ---------- */
.page-about .about-section--cta {
  border-top: 1px solid var(--hairline);
  background: var(--carbon);
}

.page-about .about-cta {
  display: grid;
  gap: 20px;
  align-items: center;
}

.page-about .about-cta__label {
  margin: 0 0 8px;
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--orange);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 600;
  line-height: 1.28;
  color: var(--fog);
  max-width: 24em;
}

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

/* ---------- 媒体容器兜底 ---------- */
.page-about .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats__inner {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-taxonomy {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px 28px;
  }

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 960px) {
  .page-about .about-stats__inner {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .about-timeline__item {
    grid-template-columns: 132px minmax(0, 1fr);
    grid-template-areas:
      "num title"
      "num text";
    align-items: start;
    column-gap: 24px;
  }

  .page-about .about-timeline__num {
    grid-area: num;
    padding-top: 6px;
  }

  .page-about .about-timeline__title {
    grid-area: title;
  }

  .page-about .about-timeline__text {
    grid-area: text;
  }
}
<<<END>>>