.page-about {
  padding-bottom: 3.5rem;
  scroll-behavior: smooth;
}

/* ---------- 首屏 ---------- */
.page-about .about-masthead {
  padding: 1.5rem 0 2rem;
  display: grid;
  gap: 2rem;
}

.page-about .about-eyebrow {
  margin: 0 0 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green);
}

.page-about .about-eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--orange));
}

.page-about .about-masthead h1 {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.95rem, 7.6vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-lede {
  margin: 0;
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .masthead-side {
  display: grid;
  gap: 1.25rem;
}

.page-about .season-mark {
  margin: 0;
  padding-left: 0.9rem;
  border-left: 3px solid var(--green);
}

.page-about .season-range {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.75rem, 8.5vw, 2.75rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .season-cap {
  display: block;
  margin-top: 0.4rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .masthead-metrics {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .metric {
  padding: 0.85rem 0.8rem;
  background: var(--panel);
}

.page-about .metric-key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .metric-val {
  margin: 0.4rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.page-about .metric-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--green);
}

.page-about .metric:nth-child(2n) .metric-num {
  color: var(--orange);
}

.page-about .metric-sub {
  font-size: 12px;
  color: var(--mist);
}

/* ---------- 章节目录轨道 ---------- */
.page-about .about-toc {
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  padding: 0.6rem 0;
}

.page-about .toc-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.4rem;
}

.page-about .toc-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.35rem 0;
  text-decoration: none;
  color: var(--silver);
  font-size: 0.875rem;
  border-bottom: 2px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .toc-link:hover,
.page-about .toc-link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--green);
}

.page-about .toc-link[aria-current="true"] {
  color: var(--paper);
  border-bottom-color: var(--orange);
}

.page-about .toc-index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: 3rem 0 1rem;
  scroll-margin-top: calc(var(--hdr-h) + 56px);
}

.page-about .about-band {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.7rem 0;
  margin-bottom: 1.6rem;
  border-bottom: 1px solid var(--line-strong);
}

.page-about .band-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--green);
}

.page-about .band-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 5.6vw, 1.95rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-section p {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-lede-sm {
  margin: 0 0 1.6rem;
  max-width: 52ch;
  color: var(--paper) !important;
}

.page-about .section-tail {
  margin: 1.8rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--line);
  color: var(--mist) !important;
  font-size: 0.875rem !important;
}

.page-about .inline-link {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid var(--green);
  padding-bottom: 1px;
}

.page-about .inline-link:hover {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- 01 内容清单 ---------- */
.page-about .topic-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .topic {
  position: relative;
  padding: 1.15rem 0 1.15rem 1.1rem;
  background: var(--ink-900);
}

.page-about .topic::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.35rem;
  width: 6px;
  height: 6px;
  background: var(--orange);
}

.page-about .topic:nth-child(2)::before {
  background: var(--green);
}

.page-about .topic:nth-child(3)::before {
  background: var(--amber);
}

.page-about .topic:nth-child(4)::before {
  background: var(--silver);
}

.page-about .topic-key {
  margin: 0 0 0.45rem !important;
  font-family: var(--font-mono);
  font-size: 13px !important;
  letter-spacing: 0.06em;
  color: var(--paper) !important;
}

.page-about .topic-text {
  margin: 0 !important;
  max-width: 62ch;
}

/* ---------- 02 图文错位 ---------- */
.page-about .split {
  display: grid;
  gap: 1.75rem;
}

.page-about .case-box {
  margin: 1.4rem 0;
  padding: 1rem 1rem 1rem 1.15rem;
  background: var(--panel);
  border-left: 3px solid var(--orange);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .case-tag {
  margin: 0 0 0.5rem !important;
  font-family: var(--font-mono);
  font-size: 11px !important;
  letter-spacing: 0.1em;
  color: var(--orange) !important;
}

.page-about .case-text {
  margin: 0 !important;
  color: var(--paper) !important;
  font-size: 0.9125rem !important;
}

.page-about .split-media {
  margin: 0;
}

.page-about .media-frame {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--board);
}

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

.page-about .media-caption {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--mist);
  line-height: 1.7;
}

/* ---------- 03 节奏表 ---------- */
.page-about .cycle-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.page-about .cycle-row {
  display: grid;
  gap: 0.4rem;
  padding: 1.1rem 0 1.1rem 1rem;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.page-about .cycle-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.15rem;
  bottom: 1.15rem;
  width: 2px;
  background: linear-gradient(180deg, var(--green), transparent);
}

.page-about .cycle-time {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--green);
}

.page-about .cycle-text {
  font-size: 0.9125rem;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- 04 时间线 ---------- */
.page-about .tl-hero {
  margin: 0 0 1.6rem;
}

.page-about .tl-jump {
  display: flex;
  margin: 0 0 2rem;
  overflow-x: auto;
  padding-bottom: 0.35rem;
}

.page-about .tl-jump-link {
  flex: 1 0 auto;
  min-width: 6.5rem;
  position: relative;
  display: block;
  padding: 0.7rem 0.9rem 0.7rem 1.1rem;
  border-left: 1px solid var(--line-strong);
  text-decoration: none;
  transition: background 180ms var(--ease);
}

.page-about .tl-jump-link:last-child {
  border-right: 1px solid var(--line-strong);
}

.page-about .tl-jump-link::before {
  content: "";
  position: absolute;
  left: -3px;
  top: 50%;
  margin-top: -3px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}

.page-about .tl-jump-link:hover {
  background: var(--panel);
}

.page-about .tl-jump-year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--paper);
}

.page-about .tl-jump-cap {
  display: block;
  margin-top: 0.15rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .tl {
  margin: 0;
  padding: 0;
  list-style: none;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 0.75rem;
  bottom: 0.75rem;
  width: 1px;
  background: var(--line-strong);
}

.page-about .tl-item {
  position: relative;
  display: grid;
  gap: 0.5rem;
  padding: 0 0 1.9rem 1.5rem;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px var(--ink-900);
}

.page-about .tl-item:last-child {
  padding-bottom: 0.5rem;
}

.page-about .tl-year {
  margin: 0 !important;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem !important;
  letter-spacing: 0.02em;
  color: var(--orange) !important;
}

.page-about .tl-body h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.08rem;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .tl-body p {
  margin: 0;
  max-width: 58ch;
}

/* ---------- 05 团队 ---------- */
.page-about .team-stage {
  position: relative;
  padding: 2rem 1.1rem 2.25rem;
  border: 1px solid var(--line-strong);
  overflow: hidden;
  background: var(--panel);
}

.page-about .team-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  z-index: 0;
}

.page-about .team-stage::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(11, 20, 32, 0.72) 0%, rgba(11, 20, 32, 0.94) 70%),
    repeating-linear-gradient(115deg, rgba(59, 224, 138, 0.06) 0 1px, transparent 1px 22px);
}

.page-about .team-lede {
  position: relative;
  z-index: 2;
  margin: 0 0 1.75rem !important;
  max-width: 54ch;
  color: var(--paper) !important;
  font-size: 0.9375rem !important;
}

.page-about .team-cards {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 1rem;
}

.page-about .team-card {
  padding: 1.1rem 1rem;
  background: var(--ink-900);
  border: 1px solid var(--line);
  border-top: 3px solid var(--board);
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .team-card:nth-child(2) {
  border-top-color: var(--green);
}

.page-about .team-card:nth-child(3) {
  border-top-color: var(--orange);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.page-about .team-role {
  margin: 0 0 0.5rem !important;
  font-family: var(--font-mono);
  font-size: 11px !important;
  letter-spacing: 0.1em;
  color: var(--green) !important;
}

.page-about .team-card:nth-child(3) .team-role {
  color: var(--orange) !important;
}

.page-about .team-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--paper);
}

.page-about .team-text {
  margin: 0 0 0.85rem !important;
  font-size: 0.875rem !important;
}

.page-about .team-list {
  margin: 0;
  padding: 0.75rem 0 0;
  list-style: none;
  border-top: 1px dashed var(--line);
}

.page-about .team-list li {
  position: relative;
  padding-left: 0.9rem;
  margin-top: 0.35rem;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-about .team-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--silver);
}

/* ---------- 06 坚持 ---------- */
.page-about .credo-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1.1rem;
}

.page-about .credo {
  padding: 1rem 0 1rem 1rem;
  border-left: 2px solid var(--green);
  background: linear-gradient(90deg, var(--panel), transparent 78%);
}

.page-about .credo:nth-child(2) {
  border-left-color: var(--amber);
}

.page-about .credo:nth-child(3) {
  border-left-color: var(--orange);
}

.page-about .credo-key {
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--paper);
}

.page-about .credo p {
  margin: 0 !important;
  max-width: 58ch;
}

/* ---------- 后续入口 ---------- */
.page-about .about-next {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--line-strong);
}

.page-about .next-head {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .next-grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .next-link {
  display: grid;
  gap: 0.3rem;
  padding: 1rem 0.9rem;
  background: var(--panel);
  text-decoration: none;
  transition: background 180ms var(--ease);
}

.page-about .next-link:hover {
  background: var(--board);
}

.page-about .next-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--paper);
}

.page-about .next-cap {
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-about .masthead-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .cycle-row {
    grid-template-columns: 12.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1.75rem;
  }

  .page-about .topic {
    padding: 1.25rem 0 1.25rem 1.4rem;
  }

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

@media (min-width: 900px) {
  .page-about {
    padding-bottom: 5rem;
  }

  .page-about .about-masthead {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    column-gap: 3.5rem;
    align-items: start;
    padding: 2.5rem 0 2.75rem;
  }

  .page-about .masthead-side {
    padding-top: 0.35rem;
  }

  .page-about .about-band {
    position: sticky;
    top: var(--hdr-h);
    z-index: 6;
    background: var(--ink-900);
    margin-bottom: 2rem;
  }

  .page-about .about-section {
    padding: 3.5rem 0 1rem;
    scroll-margin-top: calc(var(--hdr-h) + 64px);
  }

  .page-about .split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
    gap: 2.75rem;
  }

  .page-about .split-media {
    margin-top: 0.5rem;
  }

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

  .page-about .topic {
    padding-right: 1.5rem;
  }

  .page-about .tl-item {
    grid-template-columns: 9.5rem minmax(0, 1fr);
    gap: 2rem;
    padding-left: 1.75rem;
    padding-bottom: 2.25rem;
  }

  .page-about .tl-year {
    position: sticky;
    top: calc(var(--hdr-h) + 64px);
    text-align: right;
    font-size: 1.25rem !important;
  }

  .page-about .tl::before {
    left: 3px;
  }

  .page-about .team-stage {
    padding: 3rem 2.25rem 3.25rem;
  }

  .page-about .team-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .page-about .team-card:nth-child(2) {
    margin-top: 1.5rem;
  }

  .page-about .team-card:nth-child(3) {
    margin-top: 3rem;
  }

  .page-about .credo-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-about .credo {
    padding: 1.25rem 1rem 1.25rem 1.1rem;
    background: linear-gradient(180deg, var(--panel), transparent 88%);
  }

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

@media (min-width: 1120px) {
  .page-about .about-masthead h1 {
    max-width: 15ch;
  }

  .page-about .tl-jump-link {
    min-width: 9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }
}
<<<END>>>