.page-about {
  --about-track: 46px;
  --about-body: rgba(234, 253, 248, 0.82);
  --about-card-bg: linear-gradient(150deg, rgba(53, 240, 208, 0.06), rgba(14, 42, 36, 0.9) 58%);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--ink-900);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-about .about-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 58%;
  opacity: 0.32;
}

.page-about .about-hero__veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(120% 90% at 78% 12%, rgba(53, 240, 208, 0.16), transparent 58%),
    linear-gradient(180deg, rgba(7, 26, 22, 0.66) 0%, rgba(7, 26, 22, 0.92) 62%, var(--ink-900) 100%);
}

.page-about .about-hero__inner {
  padding: clamp(56px, 9vw, 108px) 0 clamp(48px, 7vw, 84px);
}

.page-about .about-hero__crumb .breadcrumb__link,
.page-about .about-hero__crumb .breadcrumb__current {
  color: var(--muted);
  font-size: 13px;
}

.page-about .about-hero__crumb .breadcrumb__link:hover {
  color: var(--cyan);
}

.page-about .about-hero__kicker {
  margin: 26px 0 12px;
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  max-width: 18ch;
  font-size: clamp(30px, 5.6vw, 62px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--bright);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__fact {
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(53, 240, 208, 0.05);
  color: var(--bright);
  font-size: 13px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.page-about .about-hero__anno {
  display: none;
}

/* ---------- 通用段落 ---------- */
.page-about .about-p {
  margin: 0 0 16px;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-p:last-child {
  margin-bottom: 0;
}

.page-about .section__title {
  color: var(--bright);
}

/* ---------- 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-origin__side {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .about-origin__anno {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--muted);
}

.page-about .about-origin__year {
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  position: relative;
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: calc(var(--about-track) / 2 - 1px);
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--line) 38%, var(--line) 100%);
  opacity: 0.75;
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-track) minmax(0, 1fr);
  gap: 0 16px;
}

.page-about .tl-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding-top: 6px;
}

.page-about .tl-node__year {
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .tl-node__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 240, 208, 0.16);
}

.page-about .tl-body {
  padding: 20px 22px;
  border-radius: var(--r-lg);
  background: var(--about-card-bg);
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-about .tl-body:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .tl-body__title {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--bright);
}

.page-about .tl-body__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 图文并排 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .about-split__media {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-split__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  display: grid;
  gap: 8px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(53, 240, 208, 0.08), rgba(14, 42, 36, 0.6));
}

.page-about .about-stat__num {
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .about-stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-band {
  display: grid;
  gap: 1px;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--line);
}

.page-about .about-band .band__item {
  display: grid;
  gap: 8px;
  padding: 20px;
  background: var(--ink-800);
}

.page-about .about-band .band__label {
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-about .about-band__text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-body);
}

/* ---------- 团队分工 ---------- */
.page-about .duty-list {
  display: grid;
  gap: 12px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .duty-row {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--steel);
  border-radius: var(--r-md);
  background: linear-gradient(90deg, rgba(53, 240, 208, 0.07), rgba(14, 42, 36, 0.35) 62%);
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-about .duty-row:hover,
.page-about .duty-row:focus-within {
  border-color: var(--cyan);
  border-left-color: var(--orange);
  transform: translateX(3px);
  outline: none;
}

.page-about .duty-row__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .duty-row__name {
  font-size: 16px;
  font-weight: 800;
  color: var(--bright);
  letter-spacing: -0.01em;
}

.page-about .duty-row__count {
  font-size: 20px;
  font-weight: 700;
  color: var(--orange);
  white-space: nowrap;
}

.page-about .duty-row__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .duty-row__shift {
  max-height: 0;
  margin-top: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--amber);
  transition: max-height 0.24s var(--ease), opacity 0.2s var(--ease), margin-top 0.24s var(--ease);
}

.page-about .duty-row:hover .duty-row__shift,
.page-about .duty-row:focus-within .duty-row__shift {
  max-height: 80px;
  margin-top: 10px;
  opacity: 1;
}

/* ---------- 服务节奏 ---------- */
.page-about .promise-list {
  display: grid;
  gap: 1px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--line);
}

.page-about .promise-item {
  display: grid;
  gap: 8px;
  padding: 22px 20px;
  background: var(--ink-900);
}

.page-about .promise-item__label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .promise-item__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 结尾行动带 ---------- */
.page-about .about-cta__box {
  display: grid;
  gap: 24px;
  padding: clamp(24px, 4.4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(90% 120% at 88% 0%, rgba(255, 122, 61, 0.14), transparent 62%),
    linear-gradient(150deg, rgba(53, 240, 208, 0.14), rgba(14, 42, 36, 0.72));
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--bright);
}

.page-about .about-cta__lead {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-body);
}

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

.page-about .about-cta__actions .btn {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .promise-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-cta__box {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-origin__side {
    position: sticky;
    top: calc(var(--top-h) + 32px);
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-about .about-split--reverse .about-split__body {
    order: 1;
  }

  .page-about .about-split--reverse .about-split__media {
    order: 2;
  }

  .page-about .duty-row:nth-child(2) {
    margin-left: 3%;
  }

  .page-about .duty-row:nth-child(3) {
    margin-left: 6%;
  }

  .page-about .duty-row:nth-child(4) {
    margin-left: 9%;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__anno {
    display: block;
    position: absolute;
    right: 26px;
    bottom: 108px;
    padding-right: 12px;
    border-right: 1px solid var(--line);
    writing-mode: vertical-rl;
    font-size: 12px;
    letter-spacing: 0.34em;
    color: var(--muted);
  }

  .page-about .tl-item {
    grid-template-columns: minmax(0, 1fr) 140px minmax(0, 1fr);
    gap: 0 28px;
    align-items: start;
  }

  .page-about .tl-node {
    grid-column: 2;
    grid-row: 1;
    padding-top: 4px;
  }

  .page-about .tl-node__year {
    font-size: 22px;
  }

  .page-about .tl-body {
    grid-column: 3;
    grid-row: 1;
    margin-top: 6px;
  }

  .page-about .tl-item:nth-child(even) .tl-body {
    grid-column: 1;
  }

  .page-about .timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero__title {
    max-width: 20ch;
  }
}
<<<END>>>