.page-about {
  --about-rail: 210px;
  --about-gap: clamp(20px, 3.4vw, 48px);
  --about-text: rgba(245, 241, 230, 0.8);
  color: var(--paper);
}

.page-about .breadcrumb {
  padding-top: clamp(14px, 2vw, 22px);
}

/* ---------- 刊头 ---------- */
.page-about .about-masthead {
  position: relative;
  padding: clamp(22px, 3.6vw, 48px) 0 clamp(22px, 3.4vw, 44px);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(114deg, transparent 0 58%, rgba(53, 240, 207, 0.06) 58% 100%),
    linear-gradient(114deg, transparent 0 74%, rgba(196, 122, 90, 0.08) 74% 100%);
}

.page-about .about-masthead__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.2vw, 44px);
  align-items: end;
}

.page-about .about-masthead__title {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 4.1rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-masthead__lede {
  max-width: 62ch;
  color: var(--about-text);
  margin: 0;
}

.page-about .about-masthead__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-about .about-stamp {
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: var(--radius);
  background: rgba(11, 38, 32, 0.74);
  box-shadow: 0 18px 40px rgba(2, 8, 6, 0.45);
  padding: 6px 18px;
}

.page-about .about-stamp__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .about-stamp__row:last-child {
  border-bottom: 0;
}

.page-about .about-stamp__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-stamp__unit {
  font-size: 0.55em;
  margin-left: 2px;
}

.page-about .about-stamp__label {
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--stone);
  text-align: right;
}

/* ---------- 图片容器 ---------- */
.page-about .about-shot {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-about .about-shot > img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-shot--wide { aspect-ratio: 16 / 7; }
.page-about .about-shot--43 { aspect-ratio: 4 / 3; }
.page-about .about-shot--square { aspect-ratio: 1 / 1; }

.page-about .about-shot::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(6, 24, 20, 0.18) 0 1px,
    transparent 1px 4px
  );
  opacity: 0.55;
}

.page-about .about-shot__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--paper);
  background: rgba(2, 8, 6, 0.74);
  border-top: 1px solid var(--line);
}

.page-about .about-banner {
  margin-top: clamp(20px, 3vw, 36px);
}

/* ---------- 非对称分栏 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.6vw, 36px);
}

.page-about .about-split__rail,
.page-about .about-split__body {
  min-width: 0;
}

.page-about .about-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  line-height: 0.86;
  letter-spacing: -0.03em;
  color: var(--clay);
}

.page-about .about-split__rail .eyebrow {
  margin-top: 10px;
}

.page-about .about-h2 {
  margin: 0 0 16px;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(1.4rem, 2.9vw, 2rem);
  line-height: 1.38;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .prose p {
  color: var(--about-text);
  line-height: 1.85;
}

.page-about .prose p:last-child {
  margin-bottom: 0;
}

/* ---------- 内容方法 ---------- */
.page-about .about-method__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 38px);
  align-items: start;
}

.page-about .method-switch {
  min-width: 0;
}

.page-about .method-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-about .method-tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-about .method-tab {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 38, 32, 0.62);
  color: var(--stone);
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .method-tab:hover {
  color: var(--paper);
  background: rgba(29, 58, 50, 0.6);
}

.page-about .method-tab__idx {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--clay);
}

.page-about .method-radio:focus-visible ~ .method-tablist {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about #about-m1:checked ~ .method-tablist .method-tab[for="about-m1"],
.page-about #about-m2:checked ~ .method-tablist .method-tab[for="about-m2"],
.page-about #about-m3:checked ~ .method-tablist .method-tab[for="about-m3"],
.page-about #about-m4:checked ~ .method-tablist .method-tab[for="about-m4"] {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about #about-m1:checked ~ .method-tablist .method-tab[for="about-m1"] .method-tab__idx,
.page-about #about-m2:checked ~ .method-tablist .method-tab[for="about-m2"] .method-tab__idx,
.page-about #about-m3:checked ~ .method-tablist .method-tab[for="about-m3"] .method-tab__idx,
.page-about #about-m4:checked ~ .method-tablist .method-tab[for="about-m4"] .method-tab__idx {
  color: rgba(2, 8, 6, 0.6);
}

.page-about .method-panel {
  display: none;
  border-left: 2px solid var(--cyan);
  padding: 2px 0 2px 18px;
  animation: about-panel-in var(--dur) var(--ease) both;
}

.page-about #about-m1:checked ~ .method-panels > .method-panel:nth-child(1),
.page-about #about-m2:checked ~ .method-panels > .method-panel:nth-child(2),
.page-about #about-m3:checked ~ .method-panels > .method-panel:nth-child(3),
.page-about #about-m4:checked ~ .method-panels > .method-panel:nth-child(4) {
  display: block;
}

.page-about .method-panel h3 {
  margin: 0 0 10px;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: 1.1rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .method-panel p {
  margin: 0 0 10px;
  color: var(--about-text);
  line-height: 1.85;
}

.page-about .method-panel__stat {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

@keyframes about-panel-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 运营节奏 ---------- */
.page-about .about-run__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-run__card {
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(11, 38, 32, 0.92), rgba(6, 24, 20, 0.92));
  box-shadow: 0 20px 46px rgba(2, 8, 6, 0.35);
}

.page-about .about-run__card--live {
  border-color: rgba(255, 106, 42, 0.42);
  background:
    linear-gradient(150deg, rgba(255, 106, 42, 0.1), transparent 46%),
    linear-gradient(160deg, rgba(11, 38, 32, 0.94), rgba(6, 24, 20, 0.94));
}

.page-about .about-run__big {
  margin: 14px 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.8rem, 8vw, 4.8rem);
  line-height: 0.86;
  letter-spacing: -0.03em;
  color: var(--orange);
}

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

.page-about .about-run__unit {
  font-size: 0.4em;
  margin-left: 6px;
  letter-spacing: 0;
}

.page-about .about-run__text {
  margin: 0;
  color: var(--about-text);
  line-height: 1.85;
}

.page-about .about-run__note {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding-left: 16px;
  border-left: 1px solid var(--line);
  font-family: var(--font-body);
  color: var(--stone);
  line-height: 1.85;
  max-width: 76ch;
}

/* ---------- 团队 ---------- */
.page-about .about-figure {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 20px;
  font-family: var(--font-editorial);
  font-size: 0.95rem;
  color: var(--stone);
}

.page-about .about-figure__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 7vw, 3.8rem);
  line-height: 0.84;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

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

.page-about .about-team__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: border-color var(--dur) var(--ease);
}

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

.page-about .about-team__role {
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--paper);
}

.page-about .about-team__desc {
  margin: 0;
  color: var(--about-text);
  line-height: 1.8;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 6px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, var(--cyan), var(--line) 60%, transparent);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 22px 0;
  outline: none;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink-bg);
  border: 1px solid var(--cyan);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 240, 207, 0.16);
}

.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--clay);
}

.page-about .about-timeline__title {
  margin: 3px 0 0;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: 1.08rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-timeline__more {
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--about-text);
  transition: max-height var(--dur-slow) var(--ease), opacity var(--dur) var(--ease), margin var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__more,
.page-about .about-timeline__item:focus .about-timeline__more,
.page-about .about-timeline__item:focus-within .about-timeline__more {
  max-height: 260px;
  opacity: 1;
  margin-top: 8px;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.8vw, 32px);
  align-items: start;
}

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

.page-about .about-counters {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-counter {
  padding-top: 10px;
  border-top: 2px solid var(--cyan);
}

.page-about .about-counter:nth-child(2) { border-top-color: var(--orange); }
.page-about .about-counter:nth-child(3) { border-top-color: var(--clay); }

.page-about .about-counter__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 3.4vw, 1.9rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-counter__label {
  display: block;
  margin-top: 5px;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--stone);
}

/* ---------- 价值主张 ---------- */
.page-about .about-values {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-value {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 22px 20px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  border-radius: var(--radius);
  background: rgba(11, 38, 32, 0.66);
}

.page-about .about-value:nth-child(2) { border-top-color: var(--orange); }
.page-about .about-value:nth-child(3) { border-top-color: var(--clay); }

.page-about .about-value__idx {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-about .about-value h3 {
  margin: 0;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: 1.1rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-value p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--about-text);
}

.page-about .about-value__link {
  align-self: flex-start;
  margin-top: auto;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 207, 0.35);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

/* ---------- 收尾行动 ---------- */
.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-cta__text h2 {
  margin: 0 0 8px;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  line-height: 1.45;
  color: var(--paper);
}

.page-about .about-cta__text p {
  margin: 0;
  color: var(--about-text);
  line-height: 1.8;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-split {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
  }

  .page-about .about-team__item {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 8px 24px;
    align-items: start;
  }

  .page-about .about-run__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-values {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-about .about-masthead__grid {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 0.72fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.55fr);
    padding: clamp(24px, 3.4vw, 40px);
  }
}

@media (min-width: 1000px) {
  .page-about .about-method__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.8fr);
  }

  .page-about .about-partner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .method-panel {
    animation: none;
  }

  .page-about .about-timeline__more {
    transition: opacity var(--dur) var(--ease);
  }
}