.page-about {
  --about-line: rgba(143, 163, 184, 0.22);
  --about-line-strong: rgba(143, 163, 184, 0.42);
  --about-pad: clamp(52px, 8vw, 104px);
  --about-text: rgba(244, 247, 250, 0.86);
  color: var(--c-paper);
  background: var(--c-ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--about-line);
  background:
    radial-gradient(115% 78% at 84% 8%, rgba(255, 90, 31, 0.2), transparent 62%),
    radial-gradient(90% 60% at 8% 92%, rgba(0, 229, 255, 0.12), transparent 66%),
    var(--c-ink);
}

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

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
  filter: saturate(0.72);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(11, 27, 43, 0.5) 0%, rgba(11, 27, 43, 0.88) 58%, var(--c-ink) 100%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  padding-top: clamp(84px, 13vw, 148px);
  padding-bottom: var(--about-pad);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 8.4vw, 88px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  color: var(--c-paper);
  text-wrap: balance;
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 2.1vw, 19px);
  line-height: 1.8;
  color: rgba(244, 247, 250, 0.84);
}

.page-about .about-metrics {
  list-style: none;
  margin: clamp(34px, 5vw, 56px) 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--about-line-strong);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 16px;
}

.page-about .about-metrics__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-metrics__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1;
  color: var(--c-cyan);
  letter-spacing: -0.01em;
}

.page-about .about-metrics__label {
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--c-muted);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  position: relative;
  padding: var(--about-pad) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-section--deep {
  background: var(--c-ink-2);
}

.page-about .about-section--violet {
  background: var(--c-ink-3);
}

.page-about .about-section--wine {
  background: linear-gradient(180deg, var(--c-wine) 0%, #4a1620 100%);
}

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

.page-about .about-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: clamp(24px, 4vw, 38px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-line-strong);
}

.page-about .about-chapter__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--c-orange);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 4.4vw, 44px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-about .about-copy {
  max-width: 64ch;
  display: grid;
  gap: 18px;
}

.page-about .about-copy p {
  margin: 0;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.86;
  color: var(--about-text);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(30px, 4.4vw, 44px) 0 0;
  padding: 0 0 0 30px;
  border-left: 1px solid var(--about-line-strong);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(24px, 3.4vw, 34px);
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 7px;
  width: 8px;
  height: 8px;
  background: var(--c-ink-2);
  border: 1px solid var(--c-cyan);
  transform: rotate(45deg);
}

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

.page-about .about-timeline__title {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 2.4vw, 21px);
  line-height: 1.35;
  color: var(--c-paper);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(244, 247, 250, 0.78);
}

/* ---------- 提醒清单 ---------- */
.page-about .about-reminders {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-reminders__item {
  padding: 20px 18px 22px;
  background: var(--c-ink-3);
}

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

.page-about .about-reminders__title {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 2.3vw, 19px);
  line-height: 1.4;
  color: var(--c-paper);
}

.page-about .about-reminders__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 247, 250, 0.8);
}

/* ---------- 引文 ---------- */
.page-about .about-quote {
  margin: clamp(30px, 4.6vw, 48px) 0 0;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--c-orange);
  max-width: 56ch;
}

.page-about .about-quote p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.7vw, 25px);
  font-style: italic;
  line-height: 1.65;
  color: var(--c-paper);
}

/* ---------- 团队 ---------- */
.page-about .about-chapter--split {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
}

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

.page-about .about-roles {
  margin-top: clamp(26px, 3.6vw, 36px);
  border-top: 1px solid var(--about-line-strong);
}

.page-about .about-role {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-role__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-role__tag {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--c-lime);
  border: 1px solid rgba(198, 255, 0, 0.42);
  padding: 3px 6px;
}

.page-about .about-role__name {
  min-width: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(15px, 2.3vw, 19px);
  line-height: 1.4;
  color: var(--c-paper);
  transition: color var(--dur) var(--ease);
}

.page-about .about-role[open] .about-role__name {
  color: var(--c-cyan);
}

.page-about .about-role__sign {
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--c-muted);
}

.page-about .about-role__sign::before {
  content: "+";
}

.page-about .about-role[open] .about-role__sign::before {
  content: "–";
}

.page-about .about-role__body {
  padding: 0 0 20px;
}

.page-about .about-role__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.84;
  color: rgba(244, 247, 250, 0.8);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--about-line-strong);
}

.page-about .about-figure .media-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--c-muted);
}

/* ---------- 覆盖 ---------- */
.page-about .about-cover {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

.page-about .about-cover .about-copy p {
  color: rgba(244, 247, 250, 0.9);
}

/* ---------- 合作方 ---------- */
.page-about .about-partners {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-partner {
  padding: 22px 18px 26px;
  background: var(--c-ink-2);
}

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

.page-about .about-partner__title {
  margin: 9px 0 9px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.5vw, 21px);
  line-height: 1.35;
  color: var(--c-paper);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(244, 247, 250, 0.8);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  background:
    radial-gradient(90% 120% at 12% 0%, rgba(255, 90, 31, 0.24), transparent 60%),
    radial-gradient(80% 100% at 92% 100%, rgba(0, 229, 255, 0.16), transparent 62%),
    var(--c-ink);
  padding: clamp(56px, 9vw, 112px) 0;
  border-top: 1px solid var(--about-line-strong);
}

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

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5.4vw, 54px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--c-paper);
}

.page-about .about-cta__text {
  margin: 18px 0 0;
  max-width: 52ch;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.8;
  color: rgba(244, 247, 250, 0.84);
}

.page-about .about-cta__actions {
  margin-top: clamp(26px, 4vw, 38px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta__actions .btn {
  min-width: 0;
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 420px) {
  .page-about .about-metrics {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-cta__actions .btn {
    width: 100%;
    text-align: center;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px 20px;
  }

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

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

  .page-about .about-role__summary {
    gap: 14px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-chapter--split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-chapter--split .about-chapter__head {
    grid-column: 1;
  }

  .page-about .about-figure--team {
    position: sticky;
    top: 48px;
  }

  .page-about .about-cover {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }

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

  .page-about .about-hero__inner {
    padding-bottom: calc(var(--about-pad) + 12px);
  }
}
</PAGE_CSS>>>