/* ==========================================================
   品牌故事页 / page-about
   移动端优先；作用域全部限定在 .page-about 内
   ========================================================== */

.page-about {
  --about-pad: clamp(56px, 8vw, 104px);
  --about-gap: clamp(22px, 4vw, 40px);
  display: block;
  background: var(--c-night);
  color: var(--c-mist);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(24px, 4vw, 40px) clamp(52px, 7.5vw, 92px);
  background:
    radial-gradient(90% 72% at 88% -12%, rgba(22, 242, 184, 0.16), transparent 62%),
    radial-gradient(70% 60% at -6% 108%, rgba(255, 138, 61, 0.10), transparent 64%),
    linear-gradient(178deg, var(--c-turf) 0%, var(--c-night) 74%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset-inline-end: -16%;
  inset-block-end: -36%;
  width: min(560px, 72vw);
  aspect-ratio: 1 / 1;
  background-image: radial-gradient(rgba(198, 208, 204, 0.22) 1px, transparent 1.5px);
  background-size: 20px 20px;
  border-radius: 50%;
  opacity: 0.45;
  pointer-events: none;
}

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

.page-about .about-hero__eyebrow {
  margin-block: var(--sp-4) 0;
  color: var(--c-cyan);
}

.page-about .about-hero__title {
  margin-block: var(--sp-3) 0;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(34px, 8.2vw, 74px);
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--c-mist);
  text-wrap: balance;
}

.page-about .about-hero__br {
  display: none;
}

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

.page-about .about-hero__lede {
  margin-block-start: var(--sp-3);
  max-width: 64ch;
  color: var(--c-gray);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-2) var(--sp-3);
  margin-block-start: var(--sp-5);
  padding-block-start: var(--sp-3);
  border-block-start: 1px solid var(--line);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-stat__value {
  font-family: var(--f-mono);
  font-size: clamp(24px, 5vw, 40px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--c-gray);
  letter-spacing: 0.04em;
}

.page-about .about-hero__rail {
  display: none;
  position: absolute;
  inset-inline-end: clamp(10px, 2vw, 28px);
  inset-block-start: clamp(96px, 16vw, 200px);
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: 0.36em;
  color: var(--c-gray);
  opacity: 0.6;
  pointer-events: none;
}

/* ---------- 区块通用 ---------- */

.page-about .about-section {
  position: relative;
  padding-block: var(--about-pad);
}

.page-about .about-section--night {
  background: var(--c-night);
}

.page-about .about-section--turf {
  background: linear-gradient(
    180deg,
    var(--c-night) 0%,
    var(--c-turf) 42%,
    var(--c-night) 100%
  );
}

.page-about .about-head {
  margin-block-end: var(--sp-5);
}

.page-about .about-head .section-head__index {
  font-family: var(--f-mono);
  color: var(--c-cyan);
}

/* ---------- 01 我们做的事 ---------- */

.page-about .about-what__lede {
  max-width: 68ch;
  color: var(--c-mist);
}

.page-about .find-path {
  list-style: none;
  margin: var(--sp-5) 0 0;
  padding: 0;
  display: grid;
  gap: var(--sp-3);
  grid-template-columns: 1fr;
}

.page-about .find-path__step {
  position: relative;
  padding: var(--sp-3);
  border-radius: var(--r-lg);
  background: var(--c-panel);
  border: 1px solid var(--line);
  border-inline-start: 2px solid var(--c-cyan);
  transition: transform 220ms ease, border-color 220ms ease;
}

.page-about .find-path__step:hover {
  transform: translateY(-3px);
  border-color: var(--cyan-32);
}

.page-about .find-path__no {
  display: inline-block;
  margin-block-end: var(--sp-2);
  font-size: 13px;
  color: var(--c-gray);
  letter-spacing: 0.12em;
}

.page-about .find-path__title {
  margin-block: 0 var(--sp-2);
  color: var(--c-mist);
}

/* ---------- 02 发展历程 ---------- */

.page-about .about-road__frame {
  margin-block-end: var(--sp-5);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  inset-block: 12px;
  inset-inline-start: 9px;
  width: 1px;
  background: linear-gradient(
    180deg,
    transparent 0%,
    var(--cyan-32) 10%,
    var(--line-strong) 86%,
    transparent 100%
  );
}

.page-about .timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: var(--sp-2);
  padding-block: 12px;
}

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

.page-about .timeline__dot {
  position: absolute;
  inset-inline-start: 4px;
  inset-block-start: 26px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 0 5px var(--cyan-12);
}

.page-about .timeline__body {
  padding: var(--sp-3);
  border-radius: var(--r-lg);
  background: rgba(10, 42, 33, 0.62);
  border: 1px solid var(--line);
  transition: border-color 220ms ease, transform 220ms ease;
}

.page-about .timeline__item:nth-child(even) .timeline__body {
  background: rgba(4, 18, 14, 0.72);
}

.page-about .timeline__item:hover .timeline__body {
  border-color: var(--cyan-32);
  transform: translateY(-2px);
}

.page-about .timeline__season {
  margin: 0 0 var(--sp-2);
  color: var(--c-orange);
  letter-spacing: 0.1em;
}

.page-about .timeline__body .t-h3 {
  margin-block: 0 var(--sp-2);
  color: var(--c-mist);
}

.page-about .timeline__body .t-body {
  margin: 0;
  color: var(--c-gray);
}

/* ---------- 03 团队与校对 ---------- */

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

.page-about .team-layout__frame {
  margin: 0;
}

.page-about .team-fold {
  margin-block-start: var(--sp-3);
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--c-panel);
  padding: var(--sp-2) var(--sp-3);
}

.page-about .team-fold .fold__summary {
  cursor: pointer;
  font-size: 15px;
  color: var(--c-cyan);
  letter-spacing: 0.02em;
}

.page-about .team-fold .fold__body {
  padding-block-start: var(--sp-2);
}

.page-about .team-gloss {
  margin: 0;
}

.page-about .team-gloss dt {
  font-size: 14px;
  color: var(--c-mist);
  letter-spacing: 0.02em;
}

.page-about .team-gloss dd {
  margin: 4px 0 var(--sp-2);
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-gray);
}

.page-about .proof-flow {
  list-style: none;
  margin: var(--sp-5) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
  position: relative;
}

.page-about .proof-flow__step {
  position: relative;
  z-index: 1;
  padding: var(--sp-3);
  border-radius: var(--r-lg);
  background: var(--c-tactical);
  border: 1px solid var(--line);
}

.page-about .proof-flow__no {
  display: block;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--c-orange);
  margin-block-end: var(--sp-2);
}

.page-about .proof-flow__step .t-h3 {
  margin-block: 0 var(--sp-2);
  color: var(--c-mist);
}

.page-about .proof-flow__step .t-body {
  margin: 0;
  color: var(--c-gray);
}

/* ---------- 04 覆盖范围 ---------- */

.page-about .coverage-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
}

.page-about .coverage-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--sp-3);
  border-radius: var(--r-lg);
  background: rgba(27, 31, 30, 0.72);
  border: 1px solid var(--line);
  transition: border-color 220ms ease, transform 220ms ease;
}

.page-about .coverage-card:hover {
  border-color: var(--cyan-32);
  transform: translateY(-3px);
}

.page-about .coverage-card .data-card__head {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--c-gray);
}

.page-about .coverage-card .data-card__value {
  margin: 0;
  font-family: var(--f-mono);
  font-size: clamp(36px, 7vw, 58px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .coverage-card .data-card__label {
  margin: 0;
  font-size: 15px;
  color: var(--c-mist);
}

.page-about .coverage-card .data-card__foot {
  margin: var(--sp-2) 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-gray);
}

.page-about .coverage-card .data-card__value--violet {
  color: var(--c-violet);
}

.page-about .coverage-card .data-card__value--warm {
  color: var(--c-orange);
}

/* ---------- 05 地域与协作 ---------- */

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

.page-about .region-layout__text .t-body {
  margin-block: 0 var(--sp-3);
  max-width: 66ch;
  color: var(--c-gray);
}

.page-about .region-layout__frame {
  margin: 0;
}

/* ---------- 06 与服务方一起工作 ---------- */

.page-about .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
}

.page-about .partner-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--sp-2);
  padding: var(--sp-3);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(18, 69, 53, 0.55), rgba(4, 18, 14, 0.72));
  border: 1px solid var(--line);
}

.page-about .partner-card .t-h3 {
  margin: 0;
  color: var(--c-mist);
}

.page-about .partner-card .t-body {
  margin: 0;
  color: var(--c-gray);
}

.page-about .partner-card .btn {
  margin-block-start: auto;
}

.page-about .about-cta {
  margin-block-start: var(--sp-5);
  padding: var(--sp-4) var(--sp-3);
  border-radius: var(--r-xl);
  background:
    radial-gradient(120% 130% at 100% 0%, rgba(255, 138, 61, 0.16), transparent 60%),
    var(--c-tactical);
  border: 1px solid var(--line-strong);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  align-items: flex-start;
}

.page-about .about-cta__text .t-h3 {
  margin: 0 0 var(--sp-2);
  color: var(--c-mist);
}

.page-about .about-cta__text .t-body {
  margin: 0;
  max-width: 56ch;
  color: var(--c-gray);
}

/* ---------- 媒体容器在页面内的补充 ---------- */

.page-about .media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--c-panel);
}

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

.page-about .media-frame--wide img {
  aspect-ratio: 10 / 6;
}

.page-about .media-frame--tall img {
  aspect-ratio: 12 / 8;
}

.page-about .media-frame .media-frame__caption {
  margin: 0;
  padding: var(--sp-2) var(--sp-3);
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-gray);
  border-block-start: 1px solid var(--line);
}

/* ---------- 移动端与桌面端断点 ---------- */

@media (min-width: 640px) {
  .page-about .find-path {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .coverage-card--wide {
    grid-column: span 2;
  }

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

@media (min-width: 720px) {
  .page-about .about-hero__br {
    display: inline;
  }

  .page-about .timeline__item {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: var(--sp-3);
  }

  .page-about .timeline__dot {
    inset-inline-start: 10px;
  }

  .page-about .timeline::before {
    inset-inline-start: 15px;
  }

  .page-about .proof-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--sp-4);
  }

  .page-about .proof-flow::before {
    content: "";
    position: absolute;
    z-index: 0;
    inset-inline: 12%;
    inset-block-start: 40px;
    height: 1px;
    background-image: linear-gradient(
      90deg,
      var(--line-strong) 0 6px,
      transparent 6px 14px
    );
    background-size: 14px 1px;
    background-repeat: repeat-x;
  }
}

@media (min-width: 960px) {
  .page-about .team-layout {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
    gap: var(--sp-5);
  }

  .page-about .region-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: center;
    gap: var(--sp-5);
  }

  .page-about .about-cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding-inline: var(--sp-5);
  }

  .page-about .about-hero__rail {
    display: block;
  }
}

@media (min-width: 1024px) {
  .page-about .coverage-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .coverage-card--wide {
    grid-column: span 3;
  }

  .page-about .coverage-card--half {
    grid-column: span 2;
  }

  .page-about .coverage-card:nth-child(2) {
    margin-block-start: var(--sp-3);
  }

  .page-about .coverage-card:nth-child(4) {
    margin-block-start: calc(var(--sp-4) * -1 + var(--sp-2));
  }

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

  .page-about .partner-card:nth-child(2) {
    transform: translateY(-14px);
  }
}

@media (min-width: 1200px) {
  .page-about .timeline {
    padding-inline-start: var(--sp-4);
  }

  .page-about .timeline__body {
    padding: var(--sp-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .find-path__step,
  .page-about .timeline__body,
  .page-about .coverage-card,
  .page-about .partner-card {
    transition: none;
  }

  .page-about .find-path__step:hover,
  .page-about .timeline__item:hover .timeline__body,
  .page-about .coverage-card:hover,
  .page-about .partner-card:nth-child(2) {
    transform: none;
  }
}
</main>