.page-about {
  background: var(--ink);
  color: var(--text);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 1.5rem 0 2.5rem;
  background:
    radial-gradient(120% 92% at 84% 0%, rgba(200, 255, 61, 0.13) 0%, rgba(200, 255, 61, 0) 58%),
    linear-gradient(168deg, var(--green) 0%, var(--ink-deep) 68%);
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--lime) 0 18%, var(--orange) 18% 26%, rgba(143, 166, 184, 0.2) 26% 100%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 1.75rem;
  padding-top: 1.15rem;
}

.page-about .about-hero__title {
  margin: 0.85rem 0 0;
  font-family: var(--font-cond);
  font-weight: 700;
  font-size: clamp(2rem, 6.2vw, 4.1rem);
  line-height: 1.08;
  letter-spacing: -0.012em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 1.05rem 0 0;
  max-width: 48ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.page-about .about-dossier {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(16, 58, 58, 0.55);
  padding: 1.05rem 1.1rem;
}

.page-about .about-dossier__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-about .about-dossier__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0;
  border-top: 1px dashed var(--line);
}

.page-about .about-dossier__row:first-of-type {
  border-top: 0;
}

.page-about .about-dossier__k {
  font-size: 0.82rem;
  color: var(--steel);
}

.page-about .about-dossier__v {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--paper);
  text-align: right;
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  padding-top: 1.05rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--line);
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.36rem 0.72rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.page-about .about-index__link .mono {
  font-size: 0.7rem;
  color: var(--lime);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  border-color: var(--lime);
  background: rgba(200, 255, 61, 0.08);
  color: var(--paper);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: 2.6rem 0 3rem;
  border-bottom: 1px solid var(--line);
}

.page-about .about-chapter--indigo {
  background: linear-gradient(180deg, rgba(42, 36, 80, 0.55) 0%, rgba(11, 15, 14, 0) 88%);
}

.page-about .about-chapter--wine {
  background: linear-gradient(180deg, rgba(90, 31, 46, 0.42) 0%, rgba(11, 15, 14, 0) 90%);
}

.page-about .about-chapter__head {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 1.6rem;
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 2.1rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
  -webkit-text-stroke: 1px rgba(200, 255, 61, 0.85);
}

@supports (-webkit-text-stroke: 1px rgba(0, 0, 0, 0.4)) {
  .page-about .about-chapter__num {
    color: transparent;
    -webkit-text-stroke: 1px rgba(200, 255, 61, 0.8);
  }
}

.page-about .about-chapter__head h2 {
  margin: 0;
  font-family: var(--font-cond);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.6vw, 2.25rem);
  line-height: 1.16;
  letter-spacing: 0.005em;
  color: var(--paper);
}

.page-about .about-chapter__lede {
  margin: 0.15rem 0 0;
  max-width: 54ch;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--steel);
}

/* ---------- 双栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: 1.5rem;
}

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

.page-about .about-text p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-text p + p {
  margin-top: 1rem;
}

.page-about .about-text--after {
  margin-top: 1.4rem;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
  min-width: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--teal);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.05);
}

.page-about .about-figure figcaption {
  padding: 0.6rem 0.85rem;
  border-top: 1px solid var(--line);
  background: rgba(11, 15, 14, 0.6);
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--steel);
}

.page-about .about-figure--band {
  margin-top: 1.75rem;
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline {
  display: grid;
  gap: 0.55rem;
}

.page-about .about-timeline .acc__item {
  border: 1px solid var(--line);
  border-left: 3px solid var(--lime);
  border-radius: var(--radius);
  background: rgba(15, 42, 34, 0.5);
}

.page-about .about-timeline .acc__trigger {
  width: 100%;
  gap: 0.9rem;
  padding: 0.95rem 1rem;
  text-align: left;
}

.page-about .about-ver__code {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  color: var(--lime);
}

.page-about .about-ver__name {
  margin-right: auto;
  font-family: var(--font-cond);
  font-size: 1.05rem;
  letter-spacing: 0.015em;
  color: var(--paper);
}

.page-about .about-timeline .acc__panel-inner {
  padding: 0.1rem 1rem 1.05rem;
}

.page-about .about-timeline .acc__panel-inner p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--text);
}

/* ---------- 三步流程 ---------- */
.page-about .about-steps {
  display: grid;
  gap: 0.55rem;
  margin: 1.35rem 0 1.35rem;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: 3.4rem minmax(0, 1fr);
  gap: 0.8rem;
  align-items: baseline;
  padding: 0.7rem 0.85rem;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: rgba(16, 58, 58, 0.28);
}

.page-about .about-step__n {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-about .about-step__t {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-step__t strong {
  color: var(--paper);
  font-weight: 600;
}

/* ---------- 岗位矩阵 ---------- */
.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.7rem;
  margin-top: 1.6rem;
}

.page-about .about-role {
  min-width: 0;
  padding: 0.95rem 1rem;
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: var(--radius);
  background: rgba(15, 42, 34, 0.55);
  transition: border-top-color 0.18s ease, background 0.18s ease;
}

.page-about .about-role:hover {
  border-top-color: var(--lime);
  background: rgba(16, 58, 58, 0.55);
}

.page-about .about-role h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-cond);
  font-size: 1rem;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-about .about-role p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.72;
  color: var(--text);
}

/* ---------- 覆盖数据 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 1.5rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--line);
  overflow: hidden;
}

.page-about .about-metric {
  min-width: 0;
  padding: 1.2rem 1.1rem;
  background: var(--ink-deep);
}

.page-about .about-metric__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.95rem;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-metric__label {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.84rem;
  line-height: 1.65;
  color: var(--steel);
}

/* ---------- 服务原则 ---------- */
.page-about .about-principles {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-principle {
  display: grid;
  gap: 0.3rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-principle__t {
  margin: 0;
  font-family: var(--font-cond);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-principle__d {
  margin: 0;
  max-width: 64ch;
  font-size: 0.92rem;
  line-height: 1.82;
  color: var(--text);
}

/* ---------- 合作矩阵 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 1.5rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--line);
  overflow: hidden;
}

.page-about .about-partner {
  min-width: 0;
  padding: 1.15rem 1.1rem;
  background: var(--green);
  transition: background 0.18s ease;
}

.page-about .about-partner:hover {
  background: var(--teal);
}

.page-about .about-partner__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-partner__label {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--steel);
}

.page-about .about-partner__tag {
  display: inline-block;
  margin-top: 0.7rem;
  opacity: 0.6;
  transition: opacity 0.18s ease;
}

.page-about .about-partner:hover .about-partner__tag {
  opacity: 1;
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  padding: 2.4rem 0 3rem;
  border-top: 1px solid var(--line-strong);
  background: linear-gradient(150deg, var(--teal) 0%, var(--ink-deep) 72%);
}

.page-about .about-cta h2 {
  margin: 0 0 0.55rem;
  font-family: var(--font-cond);
  font-weight: 700;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 54ch;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--text);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-top: 1.2rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .about-principle {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 1.75rem;
    align-items: baseline;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero {
    padding: 1.75rem 0 3.25rem;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.7fr);
    gap: 3rem;
    align-items: end;
    padding-top: 2rem;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 2.5rem;
    align-items: start;
  }

  .page-about .about-split--flip > .about-text {
    order: 2;
  }

  .page-about .about-chapter {
    padding: 3.25rem 0 3.75rem;
  }

  .page-about .about-chapter__head {
    grid-template-columns: 6rem minmax(0, 1fr);
    column-gap: 1.5rem;
    align-items: baseline;
    margin-bottom: 1.9rem;
  }

  .page-about .about-chapter__num {
    grid-row: 1 / span 2;
    font-size: 2.8rem;
  }

  .page-about .about-chapter__head h2 {
    grid-column: 2;
  }

  .page-about .about-chapter__lede {
    grid-column: 2;
  }

  .page-about .about-ver__name {
    font-size: 1.12rem;
  }
}

@media (min-width: 980px) {
  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
<<<END>>>