/* ===== 团队与历程 · about ===== */

.page-about {
  padding-top: 8px;
  padding-bottom: 48px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 4vw, 52px) 0 clamp(24px, 3vw, 40px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -12%;
  width: 68%;
  height: 150%;
  background:
    radial-gradient(circle at 68% 28%, rgba(255, 106, 26, 0.16), transparent 58%),
    radial-gradient(circle at 24% 76%, rgba(123, 212, 74, 0.09), transparent 60%),
    radial-gradient(circle at 90% 80%, rgba(76, 141, 255, 0.10), transparent 55%);
  pointer-events: none;
}

.page-about .about-hero .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(18px, 2.4vw, 30px);
}

.page-about .about-hero__frame {
  position: relative;
  z-index: 1;
  padding: clamp(24px, 3.4vw, 46px) clamp(20px, 3vw, 44px);
  border: 2px solid var(--line);
  background: linear-gradient(160deg, rgba(22, 34, 74, 0.62), rgba(6, 11, 24, 0.92));
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 2px solid var(--orange);
  pointer-events: none;
}

.page-about .about-hero__frame::before {
  top: -2px;
  left: -2px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero__frame::after {
  right: -2px;
  bottom: -2px;
  border-top: 0;
  border-left: 0;
}

.page-about .about-hero__frame h1 {
  margin: 12px 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--fg);
  max-width: 20ch;
}

.page-about .about-hero__frame .lede {
  max-width: 62ch;
  color: var(--fg-dim);
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.8;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(22px, 3vw, 34px);
  border: 2px solid var(--line);
  background: var(--line);
  box-shadow: var(--shadow-hard);
}

.page-about .about-stat {
  padding: 18px 20px;
  background: var(--void);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold);
}

.page-about .about-stat__num small {
  margin-left: 6px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--fg-dim);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--fg-dim);
}

/* ---------- 通用图区 ---------- */

.page-about .about-figure {
  margin: clamp(20px, 3vw, 34px) 0 0;
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  background: var(--panel);
  overflow: hidden;
}

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

.page-about .about-figure--timeline,
.page-about .about-figure--partners {
  margin-top: 30px;
}

/* ---------- 章节基座 ---------- */

.page-about .section {
  padding: clamp(44px, 5.6vw, 84px) 0;
}

.page-about .section__head p {
  max-width: 62ch;
  color: var(--fg-dim);
}

/* ---------- 团队分工 ---------- */

.page-about .about-roster {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  margin-top: clamp(24px, 3vw, 36px);
}

.page-about .about-roster__item {
  position: relative;
  padding: 26px 22px 28px;
  border: 2px solid var(--line);
  border-top: 4px solid var(--orange);
  background: linear-gradient(180deg, rgba(22, 34, 74, 0.72), rgba(14, 23, 48, 0.9));
  box-shadow: var(--shadow-hard);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-roster__item:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-roster__idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--orange);
  margin-bottom: 12px;
}

.page-about .about-roster__item h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 2vw, 22px);
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--fg);
}

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

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

.page-about .about-roster__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--fg-dim);
}

.page-about .about-roster__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 2px;
  background: var(--green);
}

/* ---------- 版本时间线 ---------- */

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: clamp(26px, 3.4vw, 42px) 0 0;
  padding: 0 0 0 30px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange), var(--green), var(--line));
}

.page-about .about-timeline__node {
  position: relative;
  padding: 0 0 clamp(26px, 3vw, 38px) 16px;
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--void);
  border: 2px solid var(--orange);
  transform: rotate(45deg);
}

.page-about .about-timeline__node--current::before {
  background: var(--green);
  border-color: var(--green);
}

.page-about .about-timeline__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 6px;
}

.page-about .about-timeline__ver {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--fg-dim);
}

.page-about .about-timeline__node h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(18px, 2.1vw, 23px);
  letter-spacing: -0.01em;
  margin: 4px 0 10px;
  color: var(--fg);
}

.page-about .about-timeline__node p {
  max-width: 66ch;
  color: var(--fg-dim);
  font-size: 15px;
  line-height: 1.8;
  margin: 0;
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-coverage__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  margin-top: clamp(24px, 3vw, 36px);
}

.page-about .about-dots {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
  padding: 20px;
  border: 2px solid var(--line);
  background:
    radial-gradient(circle at 18% 22%, rgba(76, 141, 255, 0.14), transparent 62%),
    radial-gradient(circle at 82% 78%, rgba(255, 194, 75, 0.10), transparent 60%),
    var(--panel);
  box-shadow: var(--shadow-hard);
}

.page-about .about-dots__cell {
  position: relative;
  display: block;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--line);
  background: rgba(42, 58, 110, 0.55);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
  cursor: default;
}

.page-about .about-dots__cell:hover,
.page-about .about-dots__cell:focus-visible {
  background: var(--green);
  border-color: var(--green);
  outline: none;
}

.page-about .about-dots__cell::after {
  content: attr(data-region);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: 3px 8px;
  border: 1px solid var(--line);
  background: var(--void);
  color: var(--fg);
  font-size: 12px;
  line-height: 1.4;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease);
  z-index: 6;
}

.page-about .about-dots__cell:hover::after,
.page-about .about-dots__cell:focus-visible::after {
  opacity: 1;
}

.page-about .about-dots__caption {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--fg-dim);
}

.page-about .about-coverage__facts {
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 2px solid var(--line);
}

.page-about .about-coverage__facts > div {
  padding: 16px 18px;
  background: var(--panel);
}

.page-about .about-coverage__facts dt {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--orange);
  margin-bottom: 6px;
}

.page-about .about-coverage__facts dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--fg-dim);
}

.page-about .about-coverage__note {
  margin: 0 0 20px;
  padding: 14px 16px;
  border-left: 4px solid var(--gold);
  background: rgba(255, 194, 75, 0.07);
  font-size: 14px;
  line-height: 1.8;
  color: var(--fg);
}

/* ---------- 更新节奏 ---------- */

.page-about .about-cadence__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-about .about-cadence__lead h2 {
  margin: 12px 0 14px;
}

.page-about .about-cadence__lead > p {
  max-width: 58ch;
  color: var(--fg-dim);
  line-height: 1.8;
}

.page-about .about-cadence__list {
  list-style: none;
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 2px solid var(--line);
}

.page-about .about-cadence__list li {
  display: grid;
  grid-template-columns: 108px 1fr;
  gap: 16px;
  align-items: baseline;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.75;
  color: var(--fg-dim);
}

.page-about .about-cadence__time {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 17px;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: -0.02em;
}

.page-about .about-cadence__time small {
  margin-left: 4px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--fg-dim);
}

.page-about .about-cadence__panel {
  align-self: start;
  padding: 24px 22px 26px;
}

.page-about .about-cadence__panel h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--fg);
}

.page-about .about-cadence__panel > p {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--fg-dim);
}

.page-about .about-cadence__check {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-about .about-cadence__check li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--fg);
}

.page-about .about-cadence__check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border: 2px solid var(--orange);
}

/* ---------- 合作生态 ---------- */

.page-about .about-partners__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-about .about-partners__body .about-figure {
  margin-top: 0;
}

.page-about .about-partners__paths {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-path {
  padding: 18px 20px 20px;
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-path:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-path--build { border-left: 4px solid var(--green); }
.page-about .about-path--api { border-left: 4px solid var(--gold); }
.page-about .about-path--joint { border-left: 4px solid var(--orange); }

.page-about .about-path h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--fg);
}

.page-about .about-path p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--fg-dim);
}

.page-about .about-partners__cta {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--fg-dim);
}

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

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--orange);
}

/* ---------- 联络 ---------- */

.page-about .about-contact__panel {
  padding: clamp(24px, 3.4vw, 46px);
}

.page-about .about-contact__panel h2 {
  margin: 12px 0 14px;
  max-width: 26ch;
}

.page-about .about-contact__intro {
  max-width: 62ch;
  color: var(--fg-dim);
  line-height: 1.8;
  margin: 0 0 26px;
}

.page-about .about-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 2px solid var(--line);
}

.page-about .about-contact__block {
  padding: 16px 18px;
  background: var(--panel);
}

.page-about .about-contact__label {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--fg-dim);
}

.page-about .about-contact__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--fg);
  word-break: break-word;
}

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

.page-about .about-contact__val a:hover,
.page-about .about-contact__val a:focus-visible {
  color: var(--orange);
}

.page-about .about-contact__hint {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-left: 4px solid var(--orange);
  background: rgba(255, 106, 26, 0.08);
  font-size: 14px;
  line-height: 1.8;
  color: var(--fg);
}

.page-about .about-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-dots {
    grid-template-columns: repeat(9, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-coverage__grid {
    grid-template-columns: 1.1fr 1fr;
    align-items: start;
  }

  .page-about .about-cadence__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-partners__body {
    grid-template-columns: 1.05fr 1fr;
    align-items: start;
  }

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

@media (min-width: 1100px) {
  .page-about .about-dots {
    grid-template-columns: repeat(11, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-roster__item,
  .page-about .about-path,
  .page-about .about-dots__cell,
  .page-about .about-dots__cell::after {
    transition: none;
  }

  .page-about .about-roster__item:hover,
  .page-about .about-path:hover {
    transform: none;
  }
}
</main>