.page-about {
  --about-hair: rgba(53, 224, 208, 0.24);
  --about-hair-soft: rgba(127, 167, 159, 0.2);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .bs-crumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 18px 0 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.page-about .bs-crumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--about-hair);
}
.page-about .bs-crumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .bs-crumb a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-about .bs-crumb [aria-current="page"] {
  color: var(--cool);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(30px, 5.5vw, 68px) 0 clamp(34px, 6vw, 76px);
  border-bottom: 1px solid var(--about-hair);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(53, 224, 208, 0.07) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(90deg, rgba(53, 224, 208, 0.07) 0 1px, transparent 1px 96px);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0) 88%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0) 88%);
}
.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
}
.page-about .about-hero__lead h1 {
  margin: 12px 0 20px;
  font-size: clamp(38px, 7.2vw, 80px);
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--cool);
}
.page-about .about-hero__lead .bs-lede {
  max-width: 46ch;
  color: var(--cool);
  font-size: clamp(16px, 1.25vw, 18px);
  line-height: 1.85;
  opacity: 0.92;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-about .about-hero__panel {
  padding: 24px 22px 22px;
  background: var(--ink-2);
  border: 1px solid var(--about-hair);
  clip-path: polygon(0 0, calc(100% - var(--notch)) 0, 100% var(--notch), 100% 100%, var(--notch) 100%, 0 calc(100% - var(--notch)));
}
.page-about .about-facts {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .about-facts li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--about-hair);
}
.page-about .about-facts li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .about-facts__k {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.06em;
}
.page-about .about-facts__v {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
}
.page-about .about-hero__stamp {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--about-hair);
  color: var(--muted);
}

/* ---------- 章节公共 ---------- */
.page-about .about-sec {
  position: relative;
  padding-top: clamp(44px, 7vw, 88px);
  padding-bottom: clamp(44px, 7vw, 88px);
}
.page-about .about-head-note {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
  white-space: nowrap;
}
.page-about .section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-hair);
  margin-bottom: clamp(26px, 4vw, 44px);
}
.page-about .section__head .section__title {
  margin: 0;
}

/* ---------- 图片 ---------- */
.page-about .bs-media {
  overflow: hidden;
  background: var(--ink-2);
}
.page-about .bs-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.68) contrast(1.06) brightness(0.94);
}
.page-about .about-ratio--4x5 {
  aspect-ratio: 4 / 5;
}
.page-about .about-ratio--7x4 {
  aspect-ratio: 7 / 4;
}
.page-about .bs-figure figcaption {
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.7;
}

/* ---------- 01 起源 ---------- */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
  align-items: start;
}
.page-about .about-origin__text p {
  margin: 0 0 1.1em;
  font-size: clamp(16px, 1.1vw, 17.5px);
  line-height: 1.88;
  color: var(--cool);
}
.page-about .about-origin__text p:last-child {
  margin-bottom: 0;
}
.page-about .about-origin__text p:first-child::first-letter {
  float: left;
  margin: 6px 12px 0 0;
  font-size: 3.1em;
  line-height: 0.88;
  font-weight: 700;
  color: var(--cyan);
}

/* ---------- 02 工作组 ---------- */
.page-about .about-teams__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}
.page-about .about-team {
  position: relative;
  padding: 24px 22px 20px;
  background: var(--ink-2);
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--cyan);
  clip-path: polygon(0 0, calc(100% - var(--notch)) 0, 100% var(--notch), 100% 100%, var(--notch) 100%, 0 calc(100% - var(--notch)));
}
.page-about .about-team__no {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--orange);
}
.page-about .about-team h3 {
  margin: 0 0 12px;
  font-size: clamp(21px, 2.1vw, 25px);
  color: var(--cool);
}
.page-about .about-team p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
}
.page-about .about-team__hand {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--about-hair);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan) !important;
}
.page-about .about-flow-figure {
  margin: clamp(30px, 5vw, 52px) 0 0;
}
.page-about .about-flow-scroll {
  overflow-x: auto;
  padding-bottom: 4px;
}
.page-about .about-flow {
  display: block;
  width: 100%;
  min-width: 600px;
  height: auto;
}
.page-about .about-flow text {
  font-family: var(--font-sans);
  text-anchor: middle;
}
.page-about .about-flow__node rect {
  fill: var(--ink-2);
  stroke: var(--about-hair);
  stroke-width: 1.5;
}
.page-about .about-flow__node--last rect {
  fill: rgba(53, 224, 208, 0.1);
  stroke: var(--cyan);
}
.page-about .about-flow__line line {
  stroke: var(--cyan);
  stroke-width: 1.6;
  stroke-dasharray: 6 6;
}
.page-about .about-flow__arrow {
  fill: var(--cyan);
}
.page-about .about-flow__name {
  font-size: 20px;
  font-weight: 700;
  fill: var(--cool);
}
.page-about .about-flow__sub {
  font-size: 12px;
  letter-spacing: 0.06em;
  fill: var(--muted);
}

/* ---------- 03 流程 ---------- */
.page-about .about-flowsec__figure {
  margin: 0 0 clamp(26px, 4vw, 42px);
}
.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-steps li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--about-hair-soft);
}
.page-about .about-steps li:last-child {
  border-bottom: 1px solid var(--about-hair-soft);
}
.page-about .about-steps__no {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--orange);
  letter-spacing: 0.08em;
  padding-top: 4px;
}
.page-about .about-steps h3 {
  margin: 0 0 8px;
  font-size: clamp(19px, 2vw, 23px);
  color: var(--cool);
}
.page-about .about-steps p {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 04 内容体系 ---------- */
.page-about .about-system {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-system li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 22px 0;
  border-top: 1px solid var(--about-hair-soft);
}
.page-about .about-system li:last-child {
  border-bottom: 1px solid var(--about-hair-soft);
}
.page-about .about-system h3 {
  margin: 0;
  font-size: clamp(20px, 2.2vw, 24px);
  color: var(--cyan);
}
.page-about .about-system p {
  margin: 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 05 时间轴 ---------- */
.page-about .about-timeline-wrap {
  overflow-x: clip;
  padding: 18px 0 6px;
}
.page-about .about-timeline {
  display: grid;
  gap: 0;
}
.page-about .about-stage {
  border-top: 1px solid var(--about-hair-soft);
}
.page-about .about-stage:last-child {
  border-bottom: 1px solid var(--about-hair-soft);
}
.page-about .about-stage > summary {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
}
.page-about .about-stage > summary::-webkit-details-marker {
  display: none;
}
.page-about .about-stage > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.page-about .about-stage__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 51, 0.16);
}
.page-about .about-stage__phase {
  font-size: clamp(19px, 2.4vw, 28px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--cool);
}
.page-about .about-stage__meta {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.page-about .about-stage[open] .about-stage__phase {
  color: var(--cyan);
}
.page-about .about-stage[open] .about-stage__meta {
  color: var(--lime);
}
.page-about .about-stage__body {
  padding: 0 4px 20px 42px;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}
.page-about .about-stage__body p {
  margin: 0;
}
.page-about .about-timeline__figure {
  margin: clamp(30px, 5vw, 52px) 0 0;
}

/* ---------- 06 数字 ---------- */
.page-about .about-numbers {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}
.page-about .about-number {
  padding: 28px 22px 26px;
  background: var(--ink);
}
.page-about .about-number__v {
  display: inline-block;
  margin: 0 0 16px;
  padding-bottom: 8px;
  font-family: var(--font-mono);
  font-size: clamp(34px, 4.6vw, 54px);
  line-height: 1;
  color: var(--cool);
  border-bottom: 3px solid var(--cyan);
}
.page-about .about-number__u {
  margin-left: 6px;
  font-size: 15px;
  color: var(--muted);
}
.page-about .about-number > p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 07 行动 ---------- */
.page-about .about-cta {
  padding-bottom: clamp(56px, 8vw, 100px);
}
.page-about .about-cta__panel {
  padding: clamp(28px, 4.5vw, 52px);
}
.page-about .about-cta__panel h2 {
  margin: 12px 0 16px;
  font-size: clamp(30px, 4.6vw, 50px);
  line-height: 1.1;
  color: var(--brown);
}
.page-about .about-cta__panel > p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--brown);
}
.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

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

@media (min-width: 820px) {
  .page-about .about-system li {
    grid-template-columns: minmax(0, 3fr) minmax(0, 7fr);
    gap: 6px 32px;
    align-items: baseline;
  }
}

@media (min-width: 880px) {
  .page-about .about-teams__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    gap: 22px;
  }
  .page-about .about-team:nth-child(2) {
    margin-top: 36px;
  }
  .page-about .about-team:nth-child(3) {
    margin-top: 14px;
  }
  .page-about .about-timeline {
    width: 97%;
    margin-left: 1.5%;
    transform: rotate(-3.6deg);
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(30px, 5vw, 60px);
  }
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }
}

@media (min-width: 1080px) {
  .page-about .about-steps li {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline {
    transform: none;
    width: 100%;
    margin-left: 0;
  }
  .page-about .about-team,
  .page-about .about-number {
    transition: none;
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</｜｜DSML｜｜ calls>