.page-about {
  --about-rule: rgba(53, 224, 208, 0.22);
  --about-gap: clamp(22px, 3.4vw, 44px);
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about h2 {
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}

.page-about h3 {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.4;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}

.page-about .prose p {
  color: var(--haze);
  font-size: 16px;
  line-height: 1.85;
  margin: 0 0 16px;
  max-width: 38em;
}

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

.page-about .about-figure-note {
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.05em;
  color: var(--haze);
  margin: 12px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--about-rule);
}

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

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 3.6vw, 42px) 0 clamp(38px, 6vw, 76px);
  background:
    linear-gradient(118deg, rgba(53, 224, 208, 0.14) 0%, rgba(53, 224, 208, 0) 46%),
    linear-gradient(302deg, rgba(245, 165, 36, 0.09) 0%, rgba(245, 165, 36, 0) 42%),
    var(--ink);
  border-bottom: 1px solid var(--about-rule);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -10%;
  right: 6%;
  width: 120px;
  height: 130%;
  background: linear-gradient(180deg, rgba(53, 224, 208, 0.16), rgba(53, 224, 208, 0));
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  margin-top: clamp(18px, 2.6vw, 30px);
}

.page-about .about-rail {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 14px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.page-about .about-rail .vertical-note {
  writing-mode: horizontal-tb;
  transform: none;
  letter-spacing: 0.16em;
  white-space: nowrap;
  color: var(--cyan);
}

.page-about .about-yearscale {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--haze);
}

.page-about .about-yearscale li {
  padding: 3px 7px;
  border: 1px solid var(--about-rule);
  white-space: nowrap;
}

.page-about .about-yearscale li:last-child {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-about .about-hero h1 {
  font-size: clamp(30px, 5.6vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.025em;
  margin: 0 0 18px;
  max-width: 15em;
}

.page-about .about-hero__lead {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--haze);
  max-width: 36em;
  margin: 0 0 clamp(22px, 3vw, 32px);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  list-style: none;
  margin: 0 0 clamp(24px, 3.2vw, 34px);
  padding: 0;
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 12px;
  border-left: 2px solid var(--cyan);
}

.page-about .about-fact__label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--haze);
}

.page-about .about-fact__value {
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

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

/* ---------- 定位 ---------- */

.page-about .about-position__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .about-position__figure {
  box-shadow: var(--shadow-hard-lg);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline__head {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .about-timeline__intro {
  font-size: 15px;
  line-height: 1.85;
  color: var(--haze);
  max-width: 40em;
  margin: 0;
}

.page-about .about-line {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--cyan);
}

.page-about .about-line__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0 20px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .about-line__year {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-line__panel summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-line__panel summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .about-line__title {
  font-size: clamp(16px, 1.8vw, 20px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-line__hint {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
  white-space: nowrap;
}

.page-about .about-line__hint::after {
  content: "展开 +";
}

.page-about .about-line__panel[open] .about-line__hint::after {
  content: "收起 −";
}

.page-about .about-line__text {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--haze);
  max-width: 36em;
  padding: 12px 14px;
  border-left: 2px solid var(--amber);
  background: rgba(18, 42, 63, 0.75);
}

/* ---------- 数字板 ---------- */

.page-about .about-numbers {
  background:
    repeating-linear-gradient(90deg, rgba(167, 182, 194, 0.07) 0 1px, transparent 1px 96px),
    var(--ink-2);
  border-top: 2px solid var(--cyan);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-numbers__head {
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-stat {
  background: var(--ink);
  padding: clamp(20px, 3vw, 30px) clamp(16px, 2.4vw, 26px);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stat__num {
  font-family: var(--mono);
  font-size: clamp(34px, 5vw, 54px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__unit {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
  margin-bottom: 10px;
}

.page-about .about-stat__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--haze);
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .about-team__lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--haze);
  margin: 0 0 clamp(22px, 3vw, 30px);
  max-width: 38em;
}

.page-about .about-roles {
  list-style: none;
  margin: 0 0 clamp(24px, 3.4vw, 34px);
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 4px 12px;
}

.page-about .about-role__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-role__num {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-role__bar {
  grid-column: 1 / -1;
  display: block;
  height: 8px;
  background: var(--ink-3);
  border: 1px solid var(--about-rule);
  overflow: hidden;
}

.page-about .about-role__bar i {
  display: block;
  height: 100%;
  background: var(--cyan);
  transition: width 320ms var(--ease), background 200ms var(--ease);
}

.page-about .about-role:nth-child(1) .about-role__bar i { width: 31%; }
.page-about .about-role:nth-child(2) .about-role__bar i { width: 33%; }
.page-about .about-role:nth-child(3) .about-role__bar i { width: 23%; }
.page-about .about-role:nth-child(4) .about-role__bar i { width: 13%; }

.page-about .about-role:hover .about-role__bar i {
  background: var(--amber);
}

.page-about .about-train {
  border: 2px solid var(--about-rule);
  border-left: 4px solid var(--amber);
  background: var(--ink-2);
  padding: clamp(18px, 2.6vw, 26px);
  box-shadow: var(--shadow-hard);
}

.page-about .about-train p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--haze);
}

.page-about .about-team__figure {
  box-shadow: var(--shadow-hard-lg);
}

/* ---------- 内容维护 ---------- */

.page-about .about-keep {
  background: var(--ink-2);
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-keep__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .about-keep__lead {
  font-size: 15px;
  line-height: 1.85;
  color: var(--haze);
  margin: 0 0 clamp(20px, 3vw, 28px);
  max-width: 36em;
}

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

.page-about .about-keep__list li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  background: var(--ink);
  padding: 16px 16px 18px;
}

.page-about .about-keep__index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--coral);
  padding-top: 3px;
}

.page-about .about-keep__list h3 {
  font-size: 16px;
  margin-bottom: 6px;
  color: var(--paper);
}

.page-about .about-keep__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
}

.page-about .about-keep__figure {
  box-shadow: var(--shadow-hard-lg);
}

/* ---------- 合规 ---------- */

.page-about .about-compliance__head {
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-about .about-compliance__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-comp {
  border: 2px solid var(--about-rule);
  background: var(--ink-2);
  padding: clamp(18px, 2.4vw, 26px);
  border-top: 3px solid var(--cyan);
}

.page-about .about-comp h3 {
  color: var(--paper);
}

.page-about .about-comp p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
}

.page-about .about-comp a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
}

.page-about .about-comp a:hover {
  color: var(--ink);
  background: var(--mint);
  text-decoration: none;
}

/* ---------- 收尾入口 ---------- */

.page-about .about-cta {
  padding: clamp(40px, 6vw, 76px) 0 clamp(48px, 7vw, 88px);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  align-items: center;
  border: 2px solid var(--cyan);
  border-left-width: 8px;
  background:
    linear-gradient(120deg, rgba(53, 224, 208, 0.12) 0%, rgba(53, 224, 208, 0) 58%),
    var(--ink-2);
  padding: clamp(24px, 4vw, 44px);
  box-shadow: var(--shadow-hard-lg);
}

.page-about .about-cta__text h2 {
  margin-bottom: 10px;
}

.page-about .about-cta__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--haze);
  max-width: 34em;
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-line__item {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 0 24px;
    align-items: start;
    padding: 20px 0 22px;
  }

  .page-about .about-line__year {
    font-size: 26px;
    padding-top: 2px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 76px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    overflow: visible;
    border-top: 2px solid var(--cyan);
    padding: 16px 0 0;
  }

  .page-about .about-rail .vertical-note {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    letter-spacing: 0.22em;
  }

  .page-about .about-yearscale {
    flex-direction: column;
    gap: 26px;
    font-size: 12px;
  }

  .page-about .about-yearscale li {
    border: 0;
    padding: 0;
    color: var(--haze);
  }

  .page-about .about-yearscale li:last-child {
    color: var(--cyan);
  }

  .page-about .about-position__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-position__aside {
    margin-top: 20px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: start;
  }

  .page-about .about-keep__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }

  .page-about .about-keep__aside {
    position: sticky;
    top: 84px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-compliance__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role__bar i {
    transition: none;
  }
}
<<<END>>>