.page-about {
  --about-radius: 0;
  --about-dash: rgba(198, 206, 220, 0.28);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 5vw, 54px) 0 clamp(100px, 13vw, 150px);
  background-color: var(--abyss);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -150px;
  right: -70px;
  width: min(58vw, 700px);
  height: 540px;
  background: linear-gradient(135deg, rgba(43, 30, 92, 0.92), rgba(43, 30, 92, 0) 74%);
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 64%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 74px;
  background: var(--deep);
  clip-path: polygon(0 100%, 100% 16%, 100% 100%);
  pointer-events: none;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(18px, 3vw, 32px);
  font-size: 0.82rem;
}

.page-about .about-hero .breadcrumbs a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-hero .breadcrumbs a:hover,
.page-about .about-hero .breadcrumbs a:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.page-about .about-hero .crumb-current {
  color: var(--cold);
}

.page-about .hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
}

.page-about .hero-title {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2rem, 5.2vw, 3.85rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--cold);
  transform: skewX(-3deg);
  transform-origin: left bottom;
  text-wrap: balance;
}

.page-about .hero-lede {
  margin: 0 0 24px;
  max-width: 60ch;
  font-size: clamp(1rem, 1.1vw, 1.1rem);
  line-height: 1.85;
  color: var(--silver);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .hero-metrics {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line-strong);
  background: rgba(7, 13, 31, 0.74);
}

.page-about .hero-metrics li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}

.page-about .hero-metrics li:last-child {
  border-bottom: 0;
}

.page-about .metric-k {
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.page-about .metric-v {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.12rem;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

@media (min-width: 900px) {
  .page-about .hero-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  padding: clamp(38px, 6vw, 70px) 0 clamp(60px, 9vw, 118px);
}

.page-about .year-rail {
  display: none;
}

.page-about .about-flow > .about-block + .about-block {
  margin-top: clamp(46px, 6vw, 88px);
  padding-top: clamp(38px, 5vw, 62px);
  border-top: 1px solid var(--line-strong);
}

.page-about .about-block {
  scroll-margin-top: 120px;
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: 128px minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 64px);
  }

  .page-about .year-rail {
    display: block;
    position: sticky;
    top: 128px;
    align-self: start;
    border-left: 1px solid var(--line-strong);
    padding-left: 16px;
  }
}

.page-about .rail-head {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.page-about .rail-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-decoration: none;
  color: var(--slate);
  transition: color 0.2s ease;
}

.page-about .rail-item::before {
  content: "";
  position: absolute;
  left: -17px;
  top: 8px;
  width: 7px;
  height: 1px;
  background: var(--line-strong);
  transition: width 0.2s ease, background 0.2s ease;
}

.page-about .rail-item:hover,
.page-about .rail-item:focus-visible {
  color: var(--neon);
}

.page-about .rail-item:hover::before,
.page-about .rail-item:focus-visible::before {
  width: 12px;
  background: var(--neon);
}

.page-about .rail-year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
}

.page-about .rail-label {
  font-size: 0.74rem;
  opacity: 0.82;
}

/* ---------- 时间线 ---------- */
.page-about .journey {
  list-style: none;
  margin: clamp(26px, 3vw, 42px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .journey::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--neon) 0%, rgba(57, 255, 139, 0.3) 52%, rgba(57, 255, 139, 0) 100%);
}

.page-about .journey-node {
  position: relative;
  padding-left: 36px;
  padding-bottom: clamp(24px, 3vw, 36px);
  scroll-margin-top: 130px;
}

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

.page-about .journey-node::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 6px;
  width: 15px;
  height: 15px;
  border: 1px solid var(--neon);
  background: var(--deep);
  transform: rotate(45deg);
  transition: background 0.2s ease;
}

.page-about .journey-node:hover::before,
.page-about .journey-node:focus-within::before {
  background: var(--neon);
}

.page-about .node-year {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.86rem;
  letter-spacing: 0.05em;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .node-title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: clamp(1.05rem, 1.4vw, 1.2rem);
  font-weight: 700;
  color: var(--cold);
}

.page-about .node-text {
  margin: 0;
  max-width: 62ch;
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--slate);
}

@media (min-width: 760px) {
  .page-about .journey-node {
    display: grid;
    grid-template-columns: 94px minmax(0, 1fr);
    column-gap: 24px;
    align-items: start;
  }

  .page-about .node-year {
    margin: 3px 0 0;
    text-align: right;
  }

  .page-about .node-main {
    min-width: 0;
  }
}

/* ---------- 流程 ---------- */
.page-about .process {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(26px, 3vw, 42px);
}

.page-about .step {
  position: relative;
  padding: 22px 20px 20px;
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(158deg, rgba(11, 34, 48, 0.92), rgba(7, 13, 31, 0.62));
  transition: border-color 0.22s ease, transform 0.22s ease;
}

.page-about .step:hover,
.page-about .step:focus,
.page-about .step:focus-within {
  border-color: var(--neon);
  transform: translateY(-3px);
  outline: none;
}

.page-about .step:focus-visible {
  box-shadow: 0 0 0 2px var(--deep), 0 0 0 4px var(--neon);
}

.page-about .step-idx {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-about .step-title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 1.16rem;
  font-weight: 700;
  color: var(--cold);
}

.page-about .step-text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--silver);
}

.page-about .step-detail {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--about-dash);
  font-size: 0.85rem;
  line-height: 1.68;
  color: var(--lime);
}

.page-about .flow-link {
  display: none;
}

@media (min-width: 900px) {
  .page-about .process {
    grid-template-columns: minmax(0, 1fr) 62px minmax(0, 1fr) 62px minmax(0, 1fr);
    gap: 0;
    align-items: stretch;
  }

  .page-about .flow-link {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 10px;
  }

  .page-about .flow-link svg {
    width: 100%;
    height: 16px;
    fill: none;
    stroke: var(--neon);
    stroke-width: 1.5;
    stroke-linecap: square;
    opacity: 0.72;
  }

  .page-about .step-detail {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    opacity: 0;
    overflow: hidden;
    border-top-color: transparent;
    transition: max-height 0.28s ease, opacity 0.24s ease, margin-top 0.24s ease, padding-top 0.24s ease;
  }

  .page-about .step:hover .step-detail,
  .page-about .step:focus .step-detail,
  .page-about .step:focus-within .step-detail {
    max-height: 160px;
    margin-top: 12px;
    padding-top: 10px;
    opacity: 1;
    border-top-color: var(--about-dash);
  }
}

.page-about .about-shot--process {
  margin-top: clamp(24px, 3vw, 38px);
}

@media (min-width: 900px) {
  .page-about .about-shot--process {
    width: 62%;
    margin-left: auto;
  }
}

/* ---------- 图文错位 ---------- */
.page-about .split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
  margin-top: clamp(26px, 3vw, 42px);
  align-items: start;
}

.page-about .body-text {
  margin: 0 0 22px;
  font-size: 0.97rem;
  line-height: 1.82;
  color: var(--silver);
}

.page-about .body-text a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 255, 139, 0.4);
}

.page-about .body-text a:hover,
.page-about .body-text a:focus-visible {
  border-bottom-color: var(--neon);
}

.page-about .about-shot {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--abyss);
  overflow: hidden;
}

.page-about .about-shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.06);
}

.page-about .about-shot--wide img {
  aspect-ratio: 7 / 3;
}

.page-about .about-shot figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 0.79rem;
  line-height: 1.62;
  color: var(--slate);
}

@media (min-width: 880px) {
  .page-about .split--team {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-about .split--partners {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-about .split--partners .about-shot {
    order: 2;
  }
}

/* ---------- 角色表 ---------- */
.page-about .role-list {
  margin: 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .role {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .role dt {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--lime);
}

.page-about .role dd {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--slate);
}

/* ---------- 合作清单 ---------- */
.page-about .partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .partner {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .partner-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .partner-name {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--cold);
}

.page-about .partner-body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.76;
  color: var(--slate);
}

/* ---------- 荣誉 ---------- */
.page-about .honor-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(26px, 3vw, 42px);
}

.page-about .honor {
  position: relative;
  padding: 24px 22px;
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--neon);
  background: linear-gradient(150deg, rgba(43, 30, 92, 0.4), rgba(7, 13, 31, 0.7));
}

.page-about .honor-year {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--ember);
  font-variant-numeric: tabular-nums;
}

.page-about .honor-title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--cold);
  line-height: 1.45;
}

.page-about .honor-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--slate);
}

@media (min-width: 760px) {
  .page-about .honor-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .honor:nth-child(2) {
    margin-top: 28px;
  }
}

/* ---------- 覆盖统计 ---------- */
.page-about .coverage-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 3vw, 42px);
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}

.page-about .cov-cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 18px;
  background: var(--deep);
}

.page-about .cov-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.05;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .cov-k {
  font-family: var(--font-head);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--cold);
}

.page-about .cov-note {
  font-size: 0.8rem;
  line-height: 1.62;
  color: var(--slate);
}

@media (min-width: 760px) {
  .page-about .coverage-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .coverage-cta {
  margin-top: clamp(26px, 3vw, 40px);
  padding: clamp(22px, 3vw, 30px);
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(120deg, rgba(11, 34, 48, 0.9) 0%, rgba(43, 30, 92, 0.55) 100%);
}

.page-about .coverage-cta .body-text {
  margin-bottom: 20px;
  color: var(--cold);
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .step,
  .page-about .step-detail,
  .page-about .journey-node::before,
  .page-about .rail-item,
  .page-about .rail-item::before {
    transition: none;
  }

  .page-about .step:hover,
  .page-about .step:focus,
  .page-about .step:focus-within {
    transform: none;
  }
}