.page-about {
  --about-spine: 34px;
  --about-miles-bg: linear-gradient(158deg, rgba(42, 35, 80, 0.78) 0%, rgba(11, 31, 26, 0.5) 72%);
  display: block;
  background: var(--night);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(56px, 12vw, 128px) 0 clamp(40px, 8vw, 84px);
  border-bottom: 1px solid var(--line);
  background: var(--ink);
}

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

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.36;
}

.page-about .about-hero__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(5, 11, 9, 0.88) 0%, rgba(11, 31, 26, 0.74) 44%, rgba(11, 31, 26, 0.98) 100%),
    repeating-linear-gradient(90deg, rgba(61, 242, 212, 0.055) 0 1px, transparent 1px 104px),
    repeating-linear-gradient(0deg, rgba(61, 242, 212, 0.045) 0 1px, transparent 1px 104px);
}

.page-about .about-hero .wrap {
  position: relative;
  z-index: 2;
}

.page-about .about-hero__eyebrow {
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  max-width: 15em;
  font-family: var(--font-head);
  font-size: clamp(32px, 7vw, 68px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: 0.03em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 62ch;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-hero__meta {
  margin: clamp(28px, 5vw, 48px) 0 0;
  padding-top: 22px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 18px 22px;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__meta .stat__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 48px);
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.01em;
}

.page-about .about-hero__meta .stat__value i {
  margin-left: 3px;
  font-size: 0.42em;
  font-style: normal;
  color: var(--mist);
  letter-spacing: 0.1em;
}

.page-about .about-hero__meta .stat__label {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

/* ---------- 时间线主体 ---------- */
.page-about .about-flow {
  position: relative;
  padding-top: clamp(44px, 8vw, 92px);
  padding-bottom: clamp(44px, 8vw, 92px);
}

.page-about .about-flow::before {
  content: "";
  position: absolute;
  top: clamp(44px, 8vw, 92px);
  bottom: clamp(44px, 8vw, 92px);
  left: calc(var(--pad-x) + var(--about-spine) / 2);
  width: 1px;
  background: linear-gradient(180deg, rgba(61, 242, 212, 0.55) 0%, rgba(61, 242, 212, 0.16) 74%, rgba(61, 242, 212, 0) 100%);
}

.page-about .chapter {
  display: grid;
  grid-template-columns: var(--about-spine) minmax(0, 1fr);
  column-gap: 16px;
}

.page-about .chapter + .chapter {
  margin-top: clamp(52px, 9vw, 104px);
}

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

.page-about .chapter__node {
  position: absolute;
  top: 7px;
  left: 50%;
  width: 11px;
  height: 11px;
  transform: translateX(-50%);
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background: var(--night);
  box-shadow: 0 0 0 5px rgba(61, 242, 212, 0.08);
}

.page-about .chap-head__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--cyan);
}

.page-about .chap-head__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(23px, 4.6vw, 38px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: 0.015em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-p {
  margin: 16px 0 0;
  max-width: 68ch;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-p a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 212, 0.4);
}

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

/* ---------- 四类视图 ---------- */
.page-about .view-grid {
  margin-top: 26px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .view-card {
  position: relative;
  padding: 20px 20px 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-about .view-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--flare);
}

.page-about .view-card__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .view-card__text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 26px 0 0;
  position: relative;
  border: 1px solid var(--line);
  background: var(--ink);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.page-about .about-figure--wide img {
  aspect-ratio: 12 / 7;
}

.page-about .about-figure__cap {
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
  background: rgba(5, 11, 9, 0.55);
}

/* ---------- 编辑流程 ---------- */
.page-about .steps {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .steps__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 0 14px;
  padding: 16px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .steps__item:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .steps__num {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--flare);
  padding-top: 3px;
}

.page-about .steps__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .steps__text {
  margin: 7px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 纠错流程 ---------- */
.page-about .fix-flow {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .fix-flow__item {
  padding: 18px 18px 20px;
  background: linear-gradient(150deg, rgba(110, 31, 46, 0.55) 0%, rgba(18, 53, 44, 0.75) 100%);
  border: 1px solid rgba(255, 90, 54, 0.22);
  border-left: 2px solid var(--flare);
}

.page-about .fix-flow__step {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--amber);
}

.page-about .fix-flow__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .fix-flow__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.82;
}

.page-about .fix-flow__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 212, 0.45);
}

/* ---------- 覆盖数据条 ---------- */
.page-about .cover-strip {
  margin: 26px 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .cover-strip__cell {
  padding: 20px 16px;
  background: var(--night);
}

.page-about .cover-strip__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .cover-strip__value i {
  margin-left: 2px;
  font-size: 0.4em;
  font-style: normal;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .cover-strip__label {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 里程碑 ---------- */
.page-about .miles {
  margin-top: 24px;
  background: var(--about-miles-bg);
  border: 1px solid rgba(61, 242, 212, 0.18);
}

.page-about .mile + .mile {
  border-top: 1px solid var(--line-soft);
}

.page-about .mile__btn {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 6px 14px;
  width: 100%;
  padding: 17px 18px;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .mile__btn:hover,
.page-about .mile__btn:focus-visible {
  background: rgba(61, 242, 212, 0.06);
}

.page-about .mile__season {
  grid-column: 1 / -1;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .mile__title {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .mile__mark {
  position: relative;
  align-self: center;
  width: 13px;
  height: 13px;
  border: 1px solid var(--cyan);
  border-radius: 2px;
  flex: none;
}

.page-about .mile__mark::before,
.page-about .mile__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}

.page-about .mile__mark::before {
  width: 6px;
  height: 1px;
}

.page-about .mile__mark::after {
  width: 1px;
  height: 6px;
  transition: opacity 0.2s ease;
}

.page-about .mile__btn[aria-expanded="true"] .mile__mark::after {
  opacity: 0;
}

.page-about .mile__panel .mile__inner {
  padding: 0 18px 18px;
}

.page-about .mile__text {
  margin: 0;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  padding: clamp(44px, 8vw, 96px) 0 clamp(56px, 9vw, 112px);
  background: linear-gradient(180deg, var(--night) 0%, var(--ink) 100%);
  border-top: 1px solid var(--line);
}

.page-about .about-cta__box {
  position: relative;
  padding: clamp(26px, 5vw, 48px);
  background: linear-gradient(145deg, rgba(42, 35, 80, 0.9) 0%, rgba(18, 53, 44, 0.9) 100%);
  border: 1px solid rgba(61, 242, 212, 0.24);
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 28px 100%, 0 calc(100% - 28px));
}

.page-about .about-cta__title {
  margin: 14px 0 0;
  max-width: 20em;
  font-family: var(--font-head);
  font-size: clamp(24px, 5vw, 40px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-cta__actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .mile__btn {
    grid-template-columns: 128px minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-about .mile__season {
    grid-column: auto;
  }

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

@media (min-width: 860px) {
  .page-about {
    --about-spine: 56px;
  }

  .page-about .view-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .steps__item {
    grid-template-columns: 56px minmax(0, 1fr);
  }

  .page-about .about-figure--half {
    max-width: 720px;
  }
}

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

  .page-about .about-hero {
    padding-bottom: clamp(60px, 7vw, 104px);
  }
}
<<<END>>>