.page-about {
  --about-hairline: rgba(30, 74, 60, 0.55);
  --about-dim: rgba(53, 240, 192, 0.22);
  --about-panel: rgba(18, 58, 46, 0.72);
  --about-on-paper: rgba(11, 31, 26, 0.74);
  background-color: var(--ink-deep);
  background-image:
    linear-gradient(var(--about-hairline) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-hairline) 1px, transparent 1px);
  background-size: 24px 24px, 24px 24px;
  background-position: -1px -1px;
  color: var(--text);
  padding-block: clamp(14px, 2.4vw, 26px) clamp(40px, 6vw, 88px);
  overflow-x: clip;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(20px, 3.4vw, 40px) clamp(24px, 3.6vw, 46px);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(29px, 5.4vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 900;
  max-width: 19ch;
  text-wrap: balance;
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 38em;
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.9;
  color: var(--text-soft);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

/* ---------- 编号章节骨架 ---------- */
.page-about .about-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding-block: clamp(24px, 4vw, 50px);
  border-top: var(--hair);
}

.page-about .about-chapter__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(42px, 9vw, 88px);
  line-height: 0.82;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--about-dim);
}

.page-about .about-chapter__body > .section-title {
  margin: 0 0 14px;
}

.page-about .about-chapter__body > p {
  margin: 0 0 14px;
  max-width: 37em;
  line-height: 1.9;
  color: var(--text-soft);
}

@media (min-width: 900px) {
  .page-about .about-chapter {
    grid-template-columns: 136px minmax(0, 1fr);
    gap: clamp(18px, 3vw, 46px);
    align-items: start;
  }
}

/* ---------- 起步三段 ---------- */
.page-about .about-origin {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-origin__item {
  padding: 16px 18px;
  border: var(--hair);
  border-radius: var(--r-md);
  background: var(--about-panel);
}

.page-about .about-origin__key {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--fluoro);
}

.page-about .about-origin__item p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-soft);
}

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

/* ---------- 正文 + 图 的不对称栏 ---------- */
.page-about .about-grid {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  margin-top: 18px;
}

.page-about .about-grid__main > p {
  margin: 0 0 14px;
  max-width: 34em;
  line-height: 1.9;
  color: var(--text-soft);
}

.page-about .about-grid__figure {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: var(--hair);
}

@media (min-width: 960px) {
  .page-about .about-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }
}

/* ---------- 字段清单 ---------- */
.page-about .about-fields {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-fields li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  align-items: baseline;
  padding: 10px 14px;
  border-left: 2px solid var(--grid-mint);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(18, 58, 46, 0.55);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .about-fields__tag {
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
}

/* ---------- 规模数据带（全页唯一亮底） ---------- */
.page-about .about-scale {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 26px);
  margin-block: clamp(22px, 4vw, 44px);
  padding: clamp(20px, 4vw, 42px);
  border-radius: var(--r-xl);
  background: var(--paper);
  color: var(--ink-on-light);
}

.page-about .about-scale__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-scale__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(25px, 3.4vw, 38px);
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--ink-on-light);
}

.page-about .about-scale__label {
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-on-paper);
}

.page-about .about-scale__note {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(11, 31, 26, 0.16);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--about-on-paper);
}

@media (min-width: 820px) {
  .page-about .about-scale {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 三步路径 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-step {
  position: relative;
  padding: 20px 20px 22px;
  border: var(--hair);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(30, 74, 60, 0.78), rgba(11, 31, 26, 0.92));
}

.page-about .about-step__idx {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--fluoro);
}

.page-about .about-step__name {
  margin: 8px 0 8px;
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .about-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-soft);
}

@media (min-width: 780px) {
  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 42px;
    right: -14px;
    width: 14px;
    height: 2px;
    background: var(--grid-mint);
  }
}

/* ---------- 版本时间线 ---------- */
.page-about .about-versions-figure {
  margin: 20px 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: var(--hair);
}

.page-about .about-versions {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.page-about .about-version {
  border: var(--hair);
  border-radius: var(--r-md);
  background: var(--about-panel);
  padding: 14px 16px;
  transition: border-color 160ms ease, transform 160ms ease;
}

.page-about .about-version:hover {
  border-color: var(--hover-cyan);
}

.page-about .about-version[open] {
  border-color: var(--fluoro);
}

.page-about .about-version summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 5px;
  position: relative;
  padding-left: 16px;
}

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

.page-about .about-version summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 8px;
  height: 8px;
  border-radius: var(--r-pill);
  background: var(--fluoro);
}

.page-about .about-version--violet summary::before {
  background: var(--violet);
}

.page-about .about-version__v {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}

.page-about .about-version--violet .about-version__v {
  color: var(--violet);
}

.page-about .about-version__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.5;
}

.page-about .about-version__body {
  margin-top: 10px;
  padding-top: 10px;
  border-top: var(--hair);
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-soft);
}

@media (min-width: 820px) {
  .page-about .about-versions {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }
}

/* ---------- 三组分工 ---------- */
.page-about .about-crews {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.page-about .about-crew {
  padding: 14px 16px;
  border-radius: var(--r-md);
  border: var(--hair);
  background: rgba(11, 31, 26, 0.55);
}

.page-about .about-crew__key {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--fluoro);
}

.page-about .about-crew p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-soft);
}

@media (min-width: 700px) {
  .page-about .about-crews {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 合作方 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-partner {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 18px;
  border: var(--hair);
  border-radius: var(--r-lg);
  background: var(--about-panel);
}

.page-about .about-partner__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--fluoro);
}

.page-about .about-partner strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-partner p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-soft);
}

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

/* ---------- 收尾入口 ---------- */
.page-about .about-cta {
  padding-top: clamp(24px, 4vw, 48px);
}

.page-about .about-cta__card {
  padding: clamp(22px, 4vw, 42px);
  border-radius: var(--r-xl);
  border: 1px solid var(--grid-mint);
  background:
    radial-gradient(120% 140% at 88% 0%, rgba(53, 240, 192, 0.16), transparent 58%),
    linear-gradient(160deg, rgba(30, 74, 60, 0.9), rgba(11, 31, 26, 0.95));
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(21px, 2.8vw, 30px);
  font-weight: 900;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.page-about .about-cta__card > p {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--text-soft);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

@media (max-width: 420px) {
  .page-about .about-cta__actions .btn {
    width: 100%;
    text-align: center;
  }
}

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