.page-about {
  position: relative;
  padding-top: clamp(64px, 11vw, 104px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .breadcrumb {
  margin: 0 0 clamp(18px, 3vw, 28px);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .breadcrumb li + li::before {
  content: "／";
  margin-right: 8px;
  color: var(--line);
}

.page-about .breadcrumb a {
  color: var(--lime);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.about-hero {
  position: relative;
  padding-bottom: clamp(30px, 5vw, 52px);
  border-bottom: 1px solid var(--line);
}

.about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: clamp(90px, 18vw, 220px);
  height: 3px;
  background: var(--lime);
}

.about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 5.2rem);
  line-height: 0.94;
  letter-spacing: -0.02em;
  text-transform: none;
  color: var(--text);
  max-width: 16ch;
}

.about-hero__lead {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 44ch;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.75;
  color: var(--text);
}

.about-hero__index {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 5vw, 44px) 0 0;
  padding: 1px;
  list-style: none;
  background: var(--line);
}

.about-hero__index li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: clamp(14px, 2vw, 20px);
  background: var(--panel);
}

.about-hero__label {
  color: var(--muted);
}

.about-hero__num {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.about-hero__unit {
  font-size: 0.8125rem;
  color: var(--muted);
}

/* ---------- 我们做什么 ---------- */
.about-what__head {
  max-width: 720px;
}

.about-what__lead {
  margin: 16px 0 0;
  color: var(--text);
  line-height: 1.75;
}

.about-what__grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(28px, 4vw, 44px);
}

.about-what__item {
  padding: clamp(18px, 3vw, 26px) 0 0;
  border-top: 1px solid var(--line);
}

.about-what__no {
  display: block;
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.about-what__item h3 {
  margin: 10px 0 10px;
  font-family: var(--font-edit);
  font-size: 1.25rem;
  letter-spacing: 0.01em;
  color: var(--text);
}

.about-what__item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

/* ---------- 流程 ---------- */
.about-flow__head {
  max-width: 720px;
}

.about-flow__head p {
  margin: 16px 0 0;
  color: var(--text);
  line-height: 1.75;
}

.about-flow__figure {
  margin: clamp(24px, 4vw, 36px) 0 0;
}

.about-flow__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .about-flow__nav .segmented__btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.page-about .about-flow__nav .segmented__btn:hover,
.page-about .about-flow__nav .segmented__btn:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
}

.flow-steps {
  display: grid;
  gap: 1px;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 1px;
  list-style: none;
  background: var(--line);
}

.flow-step {
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  background: var(--ink-night);
}

.flow-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--deep);
}

.flow-step:target::before,
.flow-step:hover::before {
  background: var(--lime);
}

.flow-step__no {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.flow-step h3 {
  margin: 10px 0 10px;
  font-size: 1.125rem;
  color: var(--text);
}

.flow-step p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  font-size: 0.9375rem;
}

/* ---------- 团队 ---------- */
.about-team__head {
  max-width: 720px;
}

.about-team__head p {
  margin: 16px 0 0;
  color: var(--text);
  line-height: 1.75;
}

.team-grid {
  display: grid;
  gap: clamp(22px, 3vw, 32px);
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.team-card {
  padding: clamp(20px, 3vw, 26px);
  background: var(--panel);
  border: 1px solid var(--line);
}

.ring {
  --pct: 0;
  position: relative;
  width: clamp(104px, 26vw, 132px);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: conic-gradient(var(--lime) calc(var(--pct) * 1%), var(--line) 0);
  display: grid;
  place-items: center;
}

.ring::after {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  background: var(--panel);
}

.ring__inner {
  position: relative;
  z-index: 1;
  font-size: clamp(1.5rem, 4vw, 1.9rem);
  font-weight: 700;
  color: var(--text);
}

.ring--edit { --pct: 46; }
.ring--engineer { --pct: 38; }
.ring--service {
  --pct: 17;
  background: conic-gradient(var(--orange) calc(var(--pct) * 1%), var(--line) 0);
}

.team-card h3 {
  margin: 18px 0 8px;
  font-family: var(--font-edit);
  font-size: 1.25rem;
  color: var(--text);
}

.team-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  font-size: 0.9375rem;
}

/* ---------- 版本演进 ---------- */
.about-history h2 {
  margin: 12px 0 0;
}

.about-history__grid {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  margin-top: clamp(24px, 4vw, 36px);
}

.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline__item {
  position: relative;
  padding: 0 0 clamp(24px, 3vw, 32px) 28px;
  border-left: 1px solid var(--line);
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 242, 60, 0.12);
}

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

.timeline__item--current::before {
  background: var(--orange);
  box-shadow: 0 0 0 6px rgba(255, 154, 46, 0.16);
}

.timeline__ver {
  margin: 0;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.timeline__item--current .timeline__ver {
  color: var(--orange);
}

.timeline__item h3 {
  margin: 8px 0 8px;
  font-family: var(--font-edit);
  font-size: 1.125rem;
  letter-spacing: 0.01em;
  color: var(--text);
}

.timeline__item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  font-size: 0.9375rem;
}

.about-history__figure {
  margin: 0;
}

.about-history__figure figcaption {
  margin-top: 12px;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--muted);
  padding-left: 12px;
  border-left: 2px solid var(--deep);
}

/* ---------- 覆盖范围 ---------- */
.about-coverage__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.about-coverage__text h2 {
  margin: 12px 0 0;
}

.about-coverage__text p {
  margin: 16px 0 0;
  color: var(--text);
  line-height: 1.75;
}

.about-coverage__link {
  margin-top: clamp(20px, 3vw, 28px);
}

.about-coverage__figure {
  margin: 0;
}

/* ---------- 纸张色区块 ---------- */
.about-recognition {
  color: var(--paper-ink);
}

.about-recognition .kicker {
  color: var(--paper-ink);
  opacity: 0.72;
}

.about-recognition h2 {
  margin: 12px 0 0;
  color: var(--paper-ink);
}

.about-recognition__lead {
  margin: 14px 0 0;
  max-width: 60ch;
  line-height: 1.75;
  color: var(--paper-ink);
}

.about-recognition__list {
  margin-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid rgba(23, 36, 27, 0.24);
}

.about-recog {
  border-bottom: 1px solid rgba(23, 36, 27, 0.24);
}

.about-recog summary {
  cursor: pointer;
  padding: 16px 26px 16px 0;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.5;
  position: relative;
}

.about-recog summary::after {
  content: "＋";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  color: var(--deep);
}

.about-recog[open] summary::after {
  content: "－";
}

.about-recog summary:focus-visible {
  outline: 2px solid var(--deep);
  outline-offset: 2px;
}

.about-recog p {
  margin: 0;
  padding: 0 0 18px;
  max-width: 68ch;
  line-height: 1.75;
  color: rgba(23, 36, 27, 0.82);
}

/* ---------- 数据态度 ---------- */
.about-stance__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.about-stance__main h2 {
  margin: 12px 0 0;
}

.about-stance__main p {
  margin: 16px 0 0;
  color: var(--text);
  line-height: 1.75;
}

.about-stance__aside {
  padding: clamp(20px, 3vw, 28px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
}

.about-stance__aside .t-label {
  color: var(--orange);
}

.about-stance__mail,
.about-stance__tel {
  margin: 12px 0 0;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text);
  word-break: break-all;
}

.about-stance__note {
  margin: 12px 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

.about-stance__aside p:last-child,
.about-stance__more {
  margin: 18px 0 0;
}

.about-stance__more a {
  color: var(--lime);
  font-size: 0.875rem;
  text-decoration: none;
  border-bottom: 1px solid var(--lime-dim);
}

.about-stance__more a:hover,
.about-stance__more a:focus-visible {
  border-bottom-color: var(--lime);
}

/* ---------- 图片容器 ---------- */
.page-about .media {
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

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

/* ---------- 平板与桌面 ---------- */
@media (min-width: 700px) {
  .about-hero__index {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .flow-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .about-coverage__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .about-history__grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    align-items: start;
  }

  .about-history__figure {
    position: sticky;
    top: calc(var(--ticker-h) + 24px);
  }

  .about-recognition__list {
    max-width: 900px;
  }

  .about-stance__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</｜｜DSML｜｜ calls>