.page-about {
  --about-rail: 96px;
  --about-card-shadow: 6px 6px 0 0 #050912;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--night);
  padding-block: clamp(44px, 7vw, 92px) 0;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, var(--steppe) 0 50%, transparent 50%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 36px;
}

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 58px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  color: var(--mist);
}

.page-about .about-hero__lede {
  max-width: 46ch;
  margin: 20px 0 0;
  font-size: 17px;
  line-height: 1.78;
  color: var(--mist);
  opacity: 0.88;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.page-about .about-hero__panel {
  display: grid;
  gap: 14px;
}

.page-about .about-hero__banner {
  position: relative;
  z-index: 1;
  margin: clamp(40px, 6vw, 72px) 0 0;
}

.page-about .about-hero__banner img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 12 / 5;
  border-top: 3px solid var(--line);
  border-bottom: 3px solid var(--line);
}

.page-about .about-hero__banner figcaption {
  max-width: var(--container);
  margin-inline: auto;
  padding: 14px var(--gutter) 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--dim);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.12fr 0.88fr;
    align-items: end;
    gap: 48px;
  }

  .page-about .about-hero__panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    padding-bottom: 34px;
  }

  .page-about .about-hero__panel > :nth-child(even) {
    transform: translateY(26px);
  }
}

@media (max-width: 899px) {
  .page-about .about-hero::before {
    background: linear-gradient(172deg, var(--steppe) 0 36%, transparent 36%);
  }
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter__inner {
  display: grid;
  gap: 20px;
}

.page-about .about-chapter__rail {
  display: flex;
  align-items: flex-start;
}

.page-about .about-chapter__rail .vertical-note {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .section--mist .about-chapter__rail .vertical-note {
  color: var(--teal);
}

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

.page-about .about-chapter__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(25px, 4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

.page-about .about-chapter__lede {
  max-width: 68ch;
  margin: 0;
  font-size: 17px;
  line-height: 1.8;
}

.page-about .section--night .about-chapter__lede,
.page-about .section--steppe .about-chapter__lede {
  color: var(--mist);
  opacity: 0.86;
}

.page-about .section--mist .about-chapter__body {
  color: #26314A;
}

.page-about .section--mist .about-chapter__lede {
  color: #3A4459;
}

@media (min-width: 900px) {
  .page-about .about-chapter__inner {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .about-chapter__rail {
    position: sticky;
    top: 128px;
    align-self: start;
  }
}

/* ---------- 痛点三卡 ---------- */
.page-about .about-pains {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-pains li {
  border: 3px solid var(--line);
  border-radius: var(--radius);
  background: rgba(28, 35, 51, 0.72);
  box-shadow: var(--about-card-shadow);
  padding: 22px 20px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .about-pains li:hover {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
}

.page-about .about-pains__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  margin-bottom: 14px;
  border: 2px solid var(--cyan);
  border-radius: 999px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-pains h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--mist);
}

.page-about .about-pains p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--dim);
}

@media (min-width: 780px) {
  .page-about .about-pains {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 数据来源统计块 ---------- */
.page-about .about-stat-grid {
  display: grid;
  gap: 18px;
  margin-top: 34px;
}

.page-about .about-stat {
  border: 3px solid var(--night);
  border-radius: var(--radius);
  background: var(--night);
  box-shadow: var(--about-card-shadow);
  padding: 22px 20px;
}

.page-about .about-stat__value {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-stat__label {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18px;
  margin: 0 0 10px;
  color: var(--mist);
}

.page-about .about-stat__foot {
  margin: 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--dim);
}

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

/* ---------- 通用配图 ---------- */
.page-about .about-figure {
  margin: 34px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  border: 3px solid var(--night);
  border-radius: var(--radius);
  box-shadow: var(--about-card-shadow);
}

.page-about .section--night .about-figure img {
  border-color: var(--line);
}

.page-about .about-figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.66;
  color: var(--dim);
}

.page-about .section--mist .about-figure figcaption {
  color: #4A5568;
}

.page-about .about-figure--wide img {
  aspect-ratio: 2 / 1;
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  margin-top: 36px;
}

.page-about .about-timeline__nodes {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 22px;
}

.page-about .about-timeline__nodes::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--line);
}

.page-about .segmented .about-timeline__node {
  position: relative;
  flex: 1 1 130px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  padding: 12px 16px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  color: var(--mist);
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
  transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.page-about .segmented .about-timeline__node::after {
  content: "";
  position: absolute;
  top: -22px;
  left: 18px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--line);
  transform: translateY(50%);
}

.page-about .segmented .about-timeline__node:hover {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
}

.page-about .segmented .about-timeline__node[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--night);
}

.page-about .segmented .about-timeline__node[aria-pressed="true"]::after {
  background: var(--orange);
}

.page-about .about-timeline__ver {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-timeline__name {
  font-size: 13px;
  letter-spacing: 0.06em;
  opacity: 0.82;
}

.page-about .about-timeline__panels {
  margin-top: 24px;
}

.page-about .about-version {
  border: 3px solid var(--line);
  border-radius: var(--radius);
  background: rgba(28, 35, 51, 0.74);
  box-shadow: var(--about-card-shadow);
  padding: clamp(20px, 3vw, 32px);
}

.page-about .about-version__meta {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.page-about .about-version__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.22;
  margin: 0 0 14px;
  color: var(--mist);
}

.page-about .about-version p:last-child {
  margin: 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--dim);
}

@media (max-width: 699px) {
  .page-about .about-timeline__nodes {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    padding-top: 0;
  }

  .page-about .about-timeline__nodes::before,
  .page-about .segmented .about-timeline__node::after {
    display: none;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-team {
  border: 3px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 18, 32, 0.55);
  box-shadow: var(--about-card-shadow);
  padding: 22px 20px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .about-team:hover {
  transform: translate(-2px, -2px);
  border-color: var(--amber);
}

.page-about .about-team__num {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 4.4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .about-team__unit {
  font-family: var(--font-body);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--dim);
}

.page-about .about-team__role {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--mist);
}

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

@media (min-width: 700px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 合作与认可 ---------- */
.page-about .about-partner-grid {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-partner {
  border: 3px solid var(--night);
  border-radius: var(--radius);
  background: var(--night);
  box-shadow: var(--about-card-shadow);
  padding: 24px 22px;
  color: var(--mist);
}

.page-about .about-partner__num {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-partner__unit {
  font-family: var(--font-body);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--dim);
}

.page-about .about-partner__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--mist);
}

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

.page-about .about-award {
  margin-top: 26px;
  border-left: 6px solid var(--teal);
  background: rgba(14, 76, 92, 0.08);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 22px 24px;
}

.page-about .about-award__label {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--teal);
}

.page-about .about-award__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: #26314A;
}

.page-about .about-award__link {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.02em;
  color: var(--teal);
  border-bottom: 2px solid currentColor;
  text-decoration: none;
}

.page-about .about-award__link:hover {
  color: var(--orange);
}

@media (min-width: 780px) {
  .page-about .about-partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 服务标准 ---------- */
.page-about .about-standard-list {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 3px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-standard {
  background: var(--night);
  padding: 22px 22px 24px;
}

.page-about .about-standard__time {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-about .about-standard__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--mist);
}

.page-about .about-standard p:last-child {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--dim);
}

.page-about .about-standard__note {
  margin: 24px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--dim);
}

.page-about .about-standard__note a {
  color: var(--cyan);
  border-bottom: 2px solid currentColor;
  text-decoration: none;
}

.page-about .about-standard__note a:hover {
  color: var(--orange);
}

@media (min-width: 860px) {
  .page-about .about-standard-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 收尾 CTA ---------- */
.page-about .about-cta__inner {
  display: grid;
  gap: 18px;
  border: 3px solid var(--cyan);
  border-radius: var(--radius);
  background: rgba(11, 18, 32, 0.62);
  box-shadow: var(--about-card-shadow);
  padding: clamp(26px, 4vw, 44px);
}

.page-about .about-cta__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--mist);
}

.page-about .about-cta__lede {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--dim);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (min-width: 900px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    column-gap: 40px;
  }

  .page-about .about-cta__title {
    grid-column: 1;
  }

  .page-about .about-cta__lede {
    grid-column: 1;
  }

  .page-about .about-cta__actions {
    grid-column: 2;
    grid-row: 1 / span 2;
    flex-direction: column;
    align-items: stretch;
  }
}
<<<END>>>