/* ===== 看台总览 / overview ===== */

.page-about {
  --about-node: 30px;
  --about-gap: 10px;
  display: block;
}

/* ---------- 首屏拼贴 ---------- */

.page-about .about-hero {
  padding-block: 18px 4px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 24px;
  margin-top: 16px;
}

.page-about .about-hero__slogan {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--pitch);
}

.page-about .about-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 11vw, 68px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 0 0 24px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-hero__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 12px 14px;
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.page-about .stat__value {
  font-size: 26px;
  line-height: 1.1;
  font-weight: 700;
  color: var(--score);
  font-variant-numeric: tabular-nums;
}

.page-about .stat__unit {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .stat__label {
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--paper);
  opacity: 0.78;
}

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

.page-about .about-hero__figure .media {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.page-about .media__caption {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 纵向路径 ---------- */

.page-about .about-track {
  margin-top: 48px;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: var(--about-node) minmax(0, 1fr);
  gap: var(--about-gap);
  padding-bottom: 34px;
}

.page-about .about-step__rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.page-about .about-step__rail::after {
  content: "";
  flex: 1;
  width: 1px;
  margin-top: 8px;
  background: linear-gradient(to bottom, var(--line-strong), rgba(231, 237, 245, 0));
}

.page-about .about-step:last-child .about-step__rail::after {
  display: none;
}

.page-about .about-step__node {
  flex: none;
  width: var(--about-node);
  height: var(--about-node);
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--muted);
  background: var(--ink-800);
  border: 1px solid var(--line);
  transition: color 0.3s ease, background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about [data-timeline-item].is-current .about-step__node {
  color: var(--ink-900);
  background: var(--pitch);
  border-color: var(--pitch);
  box-shadow: 0 0 0 6px rgba(31, 164, 99, 0.16);
}

.page-about [data-timeline-item].is-current .section__title {
  color: var(--score);
}

.page-about .about-step__body {
  min-width: 0;
  padding: 18px 14px 22px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .about-step--glass .about-step__body {
  background: var(--glass);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.page-about .about-step--bare .about-step__body {
  padding: 4px 0 0;
  background: transparent;
  border: 0;
  border-radius: 0;
}

.page-about .section__kicker {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--pitch);
}

.page-about .section__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 6.4vw, 36px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
  transition: color 0.3s ease;
}

.page-about .about-step__intro {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .prose p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper);
}

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

.page-about .prose a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-step__tail {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-step__tail a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 四条内容线 ---------- */

.page-about .about-lineup {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-lineup__item {
  padding: 14px 14px 16px;
  border-left: 2px solid var(--pitch);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(31, 164, 99, 0.08);
}

.page-about .about-lineup__name {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--paper);
}

.page-about .about-lineup__no {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--pitch);
}

.page-about .about-lineup__for {
  margin: 0 0 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--score);
}

.page-about .about-lineup__text {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.88;
}

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

/* ---------- 团队流程条 ---------- */

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(176px, 76%);
  gap: 10px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
}

.page-about .about-flow__step {
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 14px 16px;
  background: var(--ink-850);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.page-about .about-flow__step:hover,
.page-about .about-flow__step:focus-within {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  background: var(--ink-700);
}

.page-about .about-flow__no {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--card-yellow);
}

.page-about .about-flow__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--paper);
}

.page-about .about-flow__role {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .about-flow__duty {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--paper);
  opacity: 0.56;
  transition: opacity 0.25s ease;
}

.page-about .about-flow__step:hover .about-flow__duty,
.page-about .about-flow__step:focus-within .about-flow__duty {
  opacity: 1;
}

.page-about .about-shot {
  margin: 22px 0 0;
}

.page-about .about-shot .media {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

/* ---------- 更新时段 ---------- */

.page-about .about-clock {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-clock__row {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px 14px 16px;
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.page-about .about-clock__time {
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--amber);
  padding-top: 2px;
}

.page-about .about-clock__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.9;
}

/* ---------- 里程碑横向序列 ---------- */

.page-about .about-miles {
  grid-column: 1 / -1;
  margin-top: 18px;
  padding: 4px 2px 16px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(210px, 74%);
  gap: 12px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
}

.page-about .about-mile {
  position: relative;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px 20px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-mile::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 44px;
  height: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--amber);
}

.page-about .about-mile__tag {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--card-yellow);
}

.page-about .about-mile__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-mile__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 合作生态 ---------- */

.page-about .about-partners {
  display: grid;
  gap: 20px;
  align-items: start;
}

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

.page-about .about-partners__figure .media {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

/* ---------- 长期坚持 ---------- */

.page-about .about-values {
  display: grid;
  gap: 12px;
}

.page-about .about-values__item {
  padding: 14px 14px 16px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--pitch);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: rgba(18, 34, 56, 0.72);
}

.page-about .about-values__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-values__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 结尾行动 ---------- */

.page-about .about-cta {
  margin-top: 40px;
  padding-bottom: 20px;
}

.page-about .about-cta__panel {
  display: grid;
  gap: 18px;
  padding: 22px 18px 24px;
  border-radius: var(--radius);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 6vw, 30px);
  line-height: 1.22;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

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

/* ---------- 滚动显现 ---------- */

.page-about .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.page-about .reveal.is-visible {
  opacity: 1;
  transform: none;
}

.page-about .reveal--d2 {
  transition-delay: 0.09s;
}

/* ---------- 中等屏幕 ---------- */

@media (min-width: 720px) {
  .page-about {
    --about-node: 40px;
    --about-gap: 18px;
  }

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

  .page-about .about-step {
    padding-bottom: 48px;
  }

  .page-about .about-step__body {
    padding: 24px 22px 28px;
  }

  .page-about .about-lineup {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .about-clock__row {
    grid-template-columns: 90px minmax(0, 1fr);
    padding: 16px 18px 18px;
  }

  .page-about .about-values {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .about-cta__panel {
    padding: 28px 26px 30px;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-block: 28px 6px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    gap: 44px;
    align-items: end;
    margin-top: 22px;
  }

  .page-about .about-track {
    margin-top: 68px;
  }

  .page-about .about-step {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 28px;
    padding-bottom: 58px;
  }

  .page-about .about-step__body {
    padding: 28px 30px 32px;
  }

  .page-about .about-step--bare .about-step__body {
    padding: 6px 0 0;
  }

  .page-about .section__title {
    font-size: clamp(28px, 3vw, 38px);
  }

  .page-about .about-flow {
    grid-auto-flow: row;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-flow__step {
    position: relative;
  }

  .page-about .about-flow__step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 22px;
    right: -18px;
    width: 18px;
    height: 1px;
    background: var(--line-strong);
  }

  .page-about .about-miles {
    grid-auto-flow: row;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-auto-columns: auto;
    overflow: visible;
    padding-bottom: 0;
    gap: 16px;
    margin-top: 22px;
  }

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

  .page-about .about-mile:nth-child(3) {
    margin-top: 12px;
  }

  .page-about .about-mile:nth-child(5) {
    margin-top: 28px;
  }

  .page-about .about-mile:nth-child(6) {
    margin-top: 12px;
  }

  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 32px;
  }

  .page-about .about-shot--wide {
    max-width: 780px;
  }

  .page-about .about-cta {
    margin-top: 52px;
  }

  .page-about .about-cta__panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 34px 36px 36px;
  }

  .page-about .about-cta__actions {
    flex-wrap: nowrap;
  }
}

@media (min-width: 1200px) {
  .page-about .about-step__body {
    padding: 32px 38px 36px;
  }

  .page-about .about-step--bare .about-step__body {
    padding: 8px 0 0;
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .about-step__node,
  .page-about .section__title,
  .page-about .about-flow__step,
  .page-about .about-flow__duty {
    transition: none;
  }

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

  .page-about .about-flow,
  .page-about .about-miles {
    scroll-behavior: auto;
  }
}