/* ===== 站点介绍页 page-about ===== */

.page-about {
  --about-body: rgba(242, 246, 255, .82);
  --about-cut: 18px;
  display: block;
  padding-block: clamp(20px, 3vw, 36px) clamp(56px, 8vw, 96px);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about a:focus-visible,
.page-about button:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 2px;
}

.page-about .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 36px);
}

/* ---------- 左右分栏骨架 ---------- */

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 52px);
  align-items: start;
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: minmax(220px, 27%) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }
}

/* ---------- 左侧刻度栏 ---------- */

.page-about .about-rail {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}

.page-about .about-rail__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--cyan-dim);
  line-height: 1.5;
}

.page-about .about-rail__fig {
  margin: 0;
  border: 1px solid var(--hair);
  background: var(--ink-layer);
  overflow: hidden;
}

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

.page-about .about-jump__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-about .about-jump__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-jump__list::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--hair-cyan) 0%, rgba(138, 155, 181, .12) 100%);
}

.page-about .about-jump__list li {
  position: relative;
  padding-left: 18px;
}

.page-about .about-jump__list li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 15px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--hair-strong);
  transform: translate(-50%, -50%);
  transition: background-color .18s ease, border-color .18s ease;
}

.page-about .about-jump__list li:hover::before,
.page-about .about-jump__list li:focus-within::before {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-jump__link {
  display: block;
  padding: 5px 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--mist);
  text-decoration: none;
  transition: color .18s ease;
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  color: var(--cyan);
}

.page-about .about-jump__tick {
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--cyan-dim);
}

@media (max-width: 1023px) {
  .page-about .about-rail {
    display: grid;
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 12px 20px;
    align-items: start;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--hair);
  }

  .page-about .about-rail__eyebrow {
    grid-column: 1 / -1;
  }

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

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

/* ---------- 首屏 ---------- */

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

.page-about .about-hero__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(27px, 4.4vw, 46px);
  line-height: 1.22;
  letter-spacing: .02em;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 42em;
  font-size: clamp(15.5px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 700px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-facts__item {
  padding: 14px 16px 18px;
  background: var(--ink-layer);
  border-left: 2px solid var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-about .about-facts__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 26px);
  letter-spacing: .02em;
  color: var(--white);
  line-height: 1.2;
}

.page-about .about-facts__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 章节通用 ---------- */

.page-about .about-section {
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: clamp(32px, 4.5vw, 52px);
  border-top: 1px solid var(--hair);
}

.page-about .about-section > * + * {
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-about .about-section__head > * + * {
  margin-top: 10px;
}

.page-about .about-section__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan-dim);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.4vw, 27px);
  line-height: 1.45;
  letter-spacing: .05em;
  color: var(--white);
  max-width: 34em;
}

.page-about .about-copy {
  max-width: 42em;
}

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

.page-about .about-copy p + p {
  margin-top: 14px;
}

.page-about .about-copy a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-cyan);
  transition: border-color .18s ease, color .18s ease;
}

.page-about .about-copy a:hover,
.page-about .about-copy a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--cyan);
}

.page-about .about-copy--tail {
  max-width: 44em;
  padding-left: 16px;
  border-left: 2px solid var(--hair-cyan);
}

/* ---------- 定位章节 ---------- */

.page-about .about-columns {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

@media (min-width: 860px) {
  .page-about .about-columns {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
    align-items: start;
  }
}

.page-about .about-points {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--hair);
}

.page-about .about-points__item {
  padding: 14px 0 14px 14px;
  border-bottom: 1px solid var(--hair);
  border-left: 2px solid transparent;
  transition: border-left-color .18s ease, background-color .18s ease;
}

.page-about .about-points__item:hover {
  border-left-color: var(--cyan);
  background: rgba(51, 225, 225, .04);
}

.page-about .about-points__key {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .about-points__val {
  display: block;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 配图 ---------- */

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

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--hair);
  background: var(--ink-layer);
}

.page-about .about-figure .media-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 三类访客 ---------- */

.page-about .about-personas {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-personas__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 0 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--hair);
}

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

.page-about .about-personas__no {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.5;
  letter-spacing: .08em;
  color: var(--cyan-dim);
}

.page-about .about-personas__title {
  margin: 0 0 6px;
  font-size: 16px;
  line-height: 1.5;
  color: var(--white);
  font-weight: 600;
}

.page-about .about-personas__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-body);
}

/* ---------- 通道对照 ---------- */

.page-about .about-channels {
  display: grid;
  gap: 16px;
}

@media (min-width: 720px) {
  .page-about .about-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about .about-channel {
  padding: clamp(18px, 2.4vw, 24px);
  background: var(--ink-layer);
  border-top: 3px solid var(--cyan-dim);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-channel--new {
  border-top-color: var(--amber);
}

.page-about .about-channel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-about .about-channel__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .about-channel__list {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-channel__list li {
  display: grid;
  grid-template-columns: 4.6em minmax(0, 1fr);
  gap: 0 12px;
  align-items: baseline;
}

.page-about .about-channel__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--cyan-dim);
}

.page-about .about-channel--new .about-channel__key {
  color: var(--amber);
}

.page-about .about-channel__val {
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-body);
}

.page-about .about-note {
  margin: 0;
  padding: 14px 18px;
  border-left: 2px solid var(--amber);
  background: rgba(255, 154, 46, .06);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-body);
}

/* ---------- 团队指标 ---------- */

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-metrics__item {
  padding-left: 14px;
  border-left: 2px solid var(--hair-cyan);
}

.page-about .about-metrics__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.2;
  letter-spacing: .02em;
  color: var(--white);
}

.page-about .about-metrics__unit {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan-dim);
}

.page-about .about-metrics__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan-dim) 45%, rgba(26, 143, 146, .12) 100%);
}

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

.page-about .about-timeline__item + .about-timeline__item {
  margin-top: 10px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 24px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  transform: translate(-50%, -50%);
}

.page-about .about-timeline__item--key::before {
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .about-timeline__node {
  background: transparent;
}

.page-about .about-timeline__summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 13px 16px;
  background: var(--ink-layer);
  border-left: 2px solid var(--hair);
  cursor: pointer;
  list-style: none;
  transition: border-left-color .18s ease, background-color .18s ease;
}

.page-about .about-timeline__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__summary:hover {
  border-left-color: var(--cyan);
  background: rgba(19, 28, 46, .92);
}

.page-about .about-timeline__item--key .about-timeline__summary {
  border-left-color: var(--hair-amber);
}

.page-about .about-timeline__summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--cyan-dim);
}

.page-about .about-timeline__node[open] .about-timeline__summary::after {
  content: "−";
}

.page-about .about-timeline__year {
  flex: none;
  min-width: 4.2em;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .about-timeline__item--key .about-timeline__year {
  color: var(--amber);
}

.page-about .about-timeline__label {
  flex: 1 1 auto;
  font-size: 15px;
  line-height: 1.6;
  color: var(--white);
}

.page-about .about-timeline__body {
  padding: 14px 18px 18px;
  border-left: 2px solid var(--cyan-dim);
  background: rgba(19, 28, 46, .55);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .about-timeline__body p + p {
  margin-top: 10px;
}

/* ---------- 自助与人工 ---------- */

.page-about .about-paths {
  display: grid;
  gap: 16px;
}

@media (min-width: 760px) {
  .page-about .about-paths {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about .about-path {
  padding: clamp(18px, 2.4vw, 24px);
  background: var(--ink-layer);
  border-top: 2px solid var(--cyan-dim);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-path--human {
  border-top-color: var(--amber);
}

.page-about .about-path__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .1em;
  color: var(--white);
}

.page-about .about-path__list {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-path__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-body);
}

.page-about .about-path__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .64em;
  width: 6px;
  height: 6px;
  background: var(--cyan-dim);
  transform: rotate(45deg);
}

.page-about .about-path--human .about-path__list li::before {
  background: var(--amber);
}

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

@media (max-width: 479px) {
  .page-about .about-facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-metrics {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .page-about .about-personas__item {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 0 12px;
  }

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

  .page-about .about-timeline {
    padding-left: 20px;
  }

  .page-about .about-timeline__item::before {
    left: -15px;
  }

  .page-about .about-timeline__summary {
    flex-wrap: wrap;
    gap: 4px 12px;
  }

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

  .page-about .about-timeline__label {
    flex: 1 1 100%;
  }
}
</｜｜DSML｜｜ parameter>
</invoke>