.page-about {
  --about-w: 68ch;
  --about-spring-soft: rgba(124, 224, 122, 0.12);
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 40%, var(--bg-3) 100%);
  color: var(--ink);
  padding-bottom: clamp(64px, 9vw, 120px);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: 28px;
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(24px, 4vw, 48px);
  padding-bottom: clamp(36px, 5vw, 64px);
}

.page-about .about-hero__title {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 18px 0 0;
  max-width: 22ch;
}

.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: 72px;
  height: 3px;
  margin-top: 22px;
  background: linear-gradient(90deg, var(--spring), var(--spring-2));
}

.page-about .about-hero__lead {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.72;
  color: var(--ink);
  max-width: 52ch;
  margin: 26px 0 0;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(32px, 4vw, 48px);
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-stats .stat {
  background: var(--bg);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stats .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--spring);
}

.page-about .about-stats .stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-soft);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-top: 8px;
}

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

/* ---------- 侧栏赛季刻点 ---------- */
.page-about .about-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  flex: 0 0 auto;
  display: inline-block;
  padding: 7px 13px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--ink-soft);
  text-decoration: none;
  background: var(--bg-2);
  border: 1px solid var(--line);
  clip-path: var(--cut-sm);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--ink);
  border-color: var(--cyan);
  background: var(--about-spring-soft);
  outline: none;
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding: clamp(40px, 6vw, 64px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-main .about-section:first-child {
  padding-top: clamp(24px, 3vw, 40px);
}

.page-about .section__title {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(25px, 3.8vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 10px 0 0;
}

.page-about .about-lede {
  font-family: var(--font-serif);
  font-size: clamp(17px, 2.3vw, 23px);
  line-height: 1.62;
  font-weight: 400;
  color: var(--ink);
  max-width: 42ch;
  margin: 26px 0 0;
  padding-left: 18px;
  border-left: 3px solid var(--spring);
}

.page-about .about-prose {
  margin-top: 24px;
  max-width: var(--about-w);
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-prose p + p {
  margin-top: 16px;
}

.page-about .about-figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
  max-width: 100%;
}

.page-about .about-figure--mid {
  max-width: 86%;
}

.page-about .about-figure--narrow {
  max-width: 72%;
}

/* ---------- 日常动作清单 ---------- */
.page-about .about-tasks {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  max-width: 78ch;
  border-top: 1px solid var(--line);
}

.page-about .about-task {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 8px;
}

.page-about .about-task__name {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-task__name::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  background: var(--spring);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.page-about .about-task__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 团队技能树 ---------- */
.page-about .about-tree {
  margin: clamp(26px, 3.5vw, 36px) 0 0;
  max-width: 78ch;
  display: grid;
  gap: 12px;
}

.page-about .about-node {
  background: var(--bg-2);
  border-left: 3px solid var(--line);
  clip-path: var(--cut-sm);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-node[open] {
  border-left-color: var(--spring);
  background: var(--bg-3);
}

.page-about .about-node > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 17px 20px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.45;
  color: var(--ink);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-node > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-node > summary:hover {
  color: var(--spring);
  background: var(--about-spring-soft);
}

.page-about .about-node > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .about-node__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-about .about-node__name {
  flex: 1 1 auto;
  min-width: 0;
}

.page-about .about-node__sign {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
}

.page-about .about-node__sign::before,
.page-about .about-node__sign::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease);
}

.page-about .about-node__sign::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-about .about-node__sign::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-about .about-node[open] .about-node__sign::after {
  transform: scaleY(0);
}

.page-about .about-node__body {
  padding: 4px 20px 22px 20px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-node__body ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-node__body li {
  position: relative;
  padding-left: 20px;
}

.page-about .about-node__body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 10px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 横向时间线 ---------- */
.page-about .about-timeline {
  display: flex;
  gap: 0;
  margin: clamp(30px, 4vw, 46px) 0 0;
  padding-bottom: 14px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
}

.page-about .about-tl {
  flex: 1 0 214px;
  position: relative;
  padding: 26px 22px 18px 0;
  border-top: 1px solid var(--line);
  scroll-snap-align: start;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--line);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-tl:hover,
.page-about .about-tl:focus-within {
  border-color: var(--spring);
}

.page-about .about-tl:hover::before,
.page-about .about-tl:focus-within::before {
  background: var(--spring);
  transform: scale(1.3);
}

.page-about .about-tl__code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--spring);
}

.page-about .about-tl__title {
  margin: 12px 0 0;
  font-family: var(--font-sans);
  font-size: 15.5px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-tl__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-about .about-tl__note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
  opacity: 0.7;
  transition: opacity var(--dur) var(--ease), color var(--dur) var(--ease);
}

/* ---------- 使用场景 ---------- */
.page-about .about-audience {
  list-style: none;
  margin: clamp(30px, 4vw, 44px) 0 0;
  padding: 0;
}

.page-about .about-aud {
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-aud:first-child {
  border-top: 1px solid var(--line);
}

.page-about .about-aud__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--spring-2);
  text-transform: none;
}

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

.page-about .about-aud__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-aud__desc {
  margin: 10px 0 0;
  max-width: var(--about-w);
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-aud__link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-aud__link:hover,
.page-about .about-aud__link:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--cyan);
  outline: none;
}

/* ---------- 合作与生态 ---------- */
.page-about .about-eco {
  list-style: none;
  margin: clamp(26px, 3.5vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  max-width: 78ch;
}

.page-about .about-eco__item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-2);
  border-left: 3px solid var(--line);
  clip-path: var(--cut-sm);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-eco__item:hover {
  border-left-color: var(--spring);
}

.page-about .about-eco__desc {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(40px, 6vw, 72px);
  padding: clamp(28px, 4vw, 48px) clamp(22px, 3vw, 40px);
  background: linear-gradient(135deg, rgba(124, 224, 122, 0.10) 0%, rgba(242, 182, 198, 0.06) 55%, transparent 100%), var(--bg-2);
  border-left: 4px solid var(--spring);
  clip-path: var(--cut);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 900;
  line-height: 1.25;
  color: var(--ink);
}

.page-about .about-cta__text {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-cta__back {
  margin: 20px 0 0;
}

.page-about .about-cta__backlink {
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-cta__backlink:hover,
.page-about .about-cta__backlink:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  outline: none;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 700px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stats .stat {
    padding: 22px 20px;
  }

  .page-about .about-task {
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
    padding: 24px 0;
  }

  .page-about .about-task__name {
    padding-top: 2px;
  }

  .page-about .about-aud {
    grid-template-columns: 158px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
    padding: 28px 0;
  }

  .page-about .about-aud__tag {
    padding-top: 4px;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 64px;
    padding-top: 24px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    background: transparent;
    border: 0;
    border-left: 2px solid var(--line);
    clip-path: none;
    padding: 8px 0 8px 16px;
    font-size: 13.5px;
    transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    background: transparent;
    border-left-color: var(--cyan);
    color: var(--ink);
  }

  .page-about .about-figure--mid {
    max-width: 78%;
  }

  .page-about .about-figure--narrow {
    max-width: 62%;
  }

  .page-about .about-tl {
    flex: 1 0 240px;
    padding-right: 26px;
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</｜｜DSML｜｜ calls>