.page-about {
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-about .about-cover {
  padding: clamp(18px, 3.5vw, 34px) 0 clamp(26px, 4.5vw, 52px);
  border-bottom: 2px solid var(--edge);
}

.page-about .about-cover .crumbs {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-cover .eyebrow {
  display: inline-block;
  margin-bottom: .7rem;
}

.page-about .about-cover h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.1rem, 6.2vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--paper);
  margin: 0;
  max-width: 15ch;
}

.page-about .about-cover__lede {
  margin: 1.1rem 0 0;
  max-width: 34rem;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.75;
  color: var(--steel);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin: clamp(1.6rem, 3vw, 2.4rem) 0 0;
  padding: 0;
  background: var(--edge);
  border: 2px solid var(--edge);
}

.page-about .about-fact {
  background: var(--panel);
  padding: .95rem 1rem 1.05rem;
}

.page-about .about-fact dt {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--steel);
}

.page-about .about-fact dd {
  margin: .4rem 0 0;
  font-family: var(--font-body);
  font-size: .98rem;
  color: var(--paper);
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3.4vw, 1.85rem);
  font-weight: 700;
  color: var(--lime);
  margin-right: .15rem;
}

@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 品牌主张 ---------- */
.page-about .about-claim {
  padding: clamp(2.4rem, 6vw, 4.5rem) 0 clamp(2rem, 4vw, 3.2rem);
}

.page-about .about-claim__grid {
  display: grid;
  gap: clamp(1.4rem, 3vw, 2.6rem);
  align-items: start;
}

.page-about .about-claim__line {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.9rem, 5vw, 3.4rem);
  line-height: 1.08;
  color: var(--paper);
  margin: 0;
  padding-bottom: .45rem;
  border-bottom: 4px solid var(--lime);
  display: inline-block;
  max-width: 12ch;
}

.page-about .about-claim__body {
  max-width: 34rem;
}

.page-about .about-claim__body p {
  margin: 0 0 .9rem;
  line-height: 1.75;
  color: var(--paper);
}

.page-about .about-claim__body p:first-child {
  color: var(--steel);
  font-size: .96rem;
}

.page-about .about-claim__body p:nth-child(2) {
  color: var(--paper);
}

.page-about .about-claim__jump {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin: 1.3rem 0 0;
}

@media (min-width: 900px) {
  .page-about .about-claim__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(2rem, 4vw, 4rem);
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(2rem, 4.5vw, 3.4rem) 0;
  border-top: 2px solid var(--edge);
}

.page-about .about-team__shot {
  margin: clamp(1.5rem, 3vw, 2.4rem) 0 clamp(1.6rem, 3.2vw, 2.6rem);
}

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

.page-about .team-switch {
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

.page-about .team-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-about .team-bars {
  display: grid;
  gap: 10px;
}

.page-about .team-bar {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: .8rem;
  padding: 1rem 1.1rem 1.25rem;
  background: var(--panel);
  border: 2px solid var(--edge);
  cursor: pointer;
  overflow: hidden;
  transition: border-color var(--ease), background-color var(--ease), transform var(--ease);
}

.page-about .team-bar__fill {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 6px;
  width: var(--share, 40%);
  background: var(--steel);
  transition: background-color var(--ease);
}

.page-about .team-bar__name,
.page-about .team-bar__meta {
  position: relative;
  z-index: 1;
}

.page-about .team-bar__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--paper);
  letter-spacing: .01em;
}

.page-about .team-bar__meta {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--steel);
}

.page-about .team-bar--a { --share: 44%; }
.page-about .team-bar--b { --share: 34%; }
.page-about .team-bar--c { --share: 22%; }

.page-about .team-bar:hover {
  border-color: var(--moss);
}

.page-about #team-a:checked ~ .team-bars .team-bar--a,
.page-about #team-b:checked ~ .team-bars .team-bar--b,
.page-about #team-c:checked ~ .team-bars .team-bar--c {
  border-color: var(--lime);
  background: var(--band);
  transform: translateX(4px);
}

.page-about #team-a:checked ~ .team-bars .team-bar--a .team-bar__fill,
.page-about #team-b:checked ~ .team-bars .team-bar--b .team-bar__fill,
.page-about #team-c:checked ~ .team-bars .team-bar--c .team-bar__fill {
  background: var(--lime);
}

.page-about #team-a:checked ~ .team-bars .team-bar--a .team-bar__meta,
.page-about #team-b:checked ~ .team-bars .team-bar--b .team-bar__meta,
.page-about #team-c:checked ~ .team-bars .team-bar--c .team-bar__meta {
  color: var(--lime);
}

.page-about .team-panes {
  margin-top: clamp(1.1rem, 2.4vw, 1.6rem);
}

.page-about .team-pane {
  display: none;
  padding: clamp(1.1rem, 2.4vw, 1.6rem);
  background: var(--band);
  border: 2px solid var(--edge);
  border-left: 4px solid var(--lime);
}

.page-about #team-a:checked ~ .team-panes .team-pane--a,
.page-about #team-b:checked ~ .team-panes .team-pane--b,
.page-about #team-c:checked ~ .team-panes .team-pane--c {
  display: block;
}

.page-about .team-pane__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  color: var(--lime);
  margin: 0 0 .7rem;
  letter-spacing: .01em;
}

.page-about .team-pane p {
  margin: 0 0 .9rem;
  max-width: 40rem;
  line-height: 1.75;
  color: var(--paper);
}

.page-about .team-pane__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .5rem;
}

.page-about .team-pane__list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: .95rem;
  line-height: 1.65;
  color: var(--steel);
}

.page-about .team-pane__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  background: var(--orange);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  padding: clamp(2rem, 4.5vw, 3.4rem) 0;
  border-top: 2px solid var(--edge);
}

.page-about .flow-layout {
  display: grid;
  gap: clamp(1.4rem, 3vw, 2.4rem);
  margin-top: clamp(1.5rem, 3vw, 2.4rem);
}

.page-about .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(.9rem, 2vw, 1.3rem);
}

.page-about .flow-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .3rem 1.1rem;
  padding: clamp(1rem, 2.2vw, 1.4rem);
  background: var(--panel);
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-hard);
  transition: border-color var(--ease), box-shadow var(--ease), transform var(--ease);
}

.page-about .flow-step:hover {
  border-color: var(--moss);
  box-shadow: var(--shadow-hard-lg);
  transform: translate(-2px, -2px);
}

.page-about .flow-step__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: .92;
  color: var(--lime);
}

.page-about .flow-step__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: var(--paper);
  margin: 0 0 .45rem;
}

.page-about .flow-step__body p {
  margin: 0;
  max-width: 38rem;
  line-height: 1.72;
  color: var(--steel);
  font-size: .96rem;
}

.page-about .about-flow__shot {
  margin: 0;
}

@media (min-width: 960px) {
  .page-about .flow-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }
  .page-about .about-flow__shot {
    position: sticky;
    top: 6rem;
  }
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: clamp(1.5rem, 3.5vw, 2.6rem) 0;
  padding: clamp(1.8rem, 4.5vw, 3.2rem) clamp(1rem, 3vw, 2.2rem);
  background: #0A0D11;
  border: 2px solid var(--edge);
  overflow: hidden;
}

.page-about .timeline-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .13;
  pointer-events: none;
}

.page-about .timeline-inner {
  position: relative;
  z-index: 1;
}

.page-about .timeline-track {
  position: relative;
  margin-top: clamp(1.6rem, 3.4vw, 2.6rem);
  padding-left: 42px;
}

.page-about .timeline-axis {
  position: absolute;
  left: 15px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(to bottom, var(--lime), var(--moss) 40%, var(--edge));
  transform-origin: center;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(1rem, 2.6vw, 1.8rem);
}

.page-about .tl-item {
  position: relative;
}

.page-about .tl-dot {
  position: absolute;
  left: -33px;
  top: .85rem;
  width: 12px;
  height: 12px;
  background: var(--lime);
  border: 2px solid #0A0D11;
  transition: background-color var(--ease), transform var(--ease);
}

.page-about .tl-card {
  padding: clamp(.9rem, 2vw, 1.2rem);
  background: var(--panel);
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-hard);
  transition: border-color var(--ease), box-shadow var(--ease), transform var(--ease);
}

.page-about .tl-code {
  display: block;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .09em;
  color: var(--orange);
  margin-bottom: .5rem;
}

.page-about .tl-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.02rem, 2.2vw, 1.22rem);
  color: var(--paper);
  margin: 0 0 .5rem;
}

.page-about .tl-text {
  margin: 0;
  line-height: 1.7;
  font-size: .95rem;
  color: var(--steel);
}

.page-about .tl-note {
  margin: .7rem 0 0;
  padding-left: .7rem;
  border-left: 2px solid var(--edge);
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1.6;
  color: var(--steel);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height var(--ease), opacity var(--ease), border-color var(--ease);
}

.page-about .tl-item:hover .tl-dot,
.page-about .tl-item:focus-within .tl-dot {
  background: var(--bright);
  transform: scale(1.25);
}

.page-about .tl-item:hover .tl-card,
.page-about .tl-item:focus-within .tl-card {
  border-color: var(--moss);
  box-shadow: var(--shadow-hard-lg);
  transform: translate(-2px, -2px);
}

.page-about .tl-item:hover .tl-note,
.page-about .tl-item:focus-within .tl-note {
  max-height: 5rem;
  opacity: 1;
  border-left-color: var(--lime);
}

@media (hover: none) {
  .page-about .tl-note {
    max-height: 5rem;
    opacity: 1;
  }
}

@media (min-width: 900px) {
  .page-about .timeline-track {
    padding-left: 0;
  }
  .page-about .timeline-axis {
    left: calc(50% - 1px);
    transform: rotate(4deg);
  }
  .page-about .tl-item {
    width: calc(50% - 40px);
  }
  .page-about .tl-item:nth-child(odd) {
    margin-right: auto;
  }
  .page-about .tl-item:nth-child(even) {
    margin-left: auto;
  }
  .page-about .tl-item:nth-child(odd) .tl-dot {
    left: auto;
    right: -26px;
  }
  .page-about .tl-item:nth-child(even) .tl-dot {
    left: -26px;
  }
}

/* ---------- 覆盖与运营中心 ---------- */
.page-about .about-reach {
  padding: clamp(2rem, 4.5vw, 3.4rem) 0;
  border-top: 2px solid var(--edge);
}

.page-about .reach-layout {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.6rem);
  align-items: start;
}

.page-about .reach-copy p {
  margin: 1rem 0 0;
  max-width: 34rem;
  line-height: 1.75;
  color: var(--steel);
}

.page-about .reach-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(.8rem, 2vw, 1.1rem);
}

.page-about .reach-stats .stat {
  padding: 1rem 1rem 1.1rem;
  background: var(--panel);
  border: 2px solid var(--edge);
}

.page-about .reach-stats .stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  font-weight: 700;
  color: var(--lime);
  line-height: 1.05;
  letter-spacing: -.01em;
}

.page-about .reach-stats .stat-label {
  display: block;
  margin-top: .5rem;
  font-size: .86rem;
  line-height: 1.6;
  color: var(--steel);
}

@media (min-width: 960px) {
  .page-about .reach-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.6rem);
  }
}

/* ---------- 内容标准与合作 ---------- */
.page-about .about-partner {
  padding: clamp(2rem, 4.5vw, 3.4rem) 0;
  border-top: 2px solid var(--edge);
}

.page-about .partner-grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.4rem);
  margin-top: clamp(1.4rem, 3vw, 2.2rem);
}

.page-about .partner-card {
  padding: clamp(1.1rem, 2.4vw, 1.6rem);
  background: var(--band);
  border: 2px solid var(--edge);
  border-top: 4px solid var(--orange);
}

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

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

.page-about .partner-card__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.02rem, 2.2vw, 1.2rem);
  color: var(--paper);
  margin: 0 0 .7rem;
}

.page-about .partner-card p {
  margin: 0;
  line-height: 1.75;
  font-size: .95rem;
  color: var(--steel);
}

@media (min-width: 900px) {
  .page-about .partner-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 4fr) minmax(0, 3fr);
  }
}

/* ---------- 继续入口 ---------- */
.page-about .about-next {
  margin-top: clamp(1.6rem, 3.5vw, 2.6rem);
  padding: clamp(1.4rem, 3vw, 2.2rem);
  background: var(--band);
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-hard);
}

.page-about .about-next__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  color: var(--paper);
  margin: 0 0 1.1rem;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}

@media (max-width: 599px) {
  .page-about .about-next__links .btn {
    flex: 1 1 100%;
    justify-content: center;
  }
}