/* ============ 品牌文化页 · 页面专属样式（作用域 .page-about） ============ */

.page-about {
  --about-axis-x: 13px;
  --about-node-size: 15px;
  --about-item-pad: 44px;
}

@media (min-width: 900px) {
  .page-about {
    --about-axis-x: 44px;
    --about-node-size: 17px;
    --about-item-pad: 120px;
  }
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-top: var(--space-4);
  padding-bottom: var(--space-6);
}

.page-about .about-hero__crumb {
  margin: 0 0 var(--space-4);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .about-hero__crumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-hero__crumb a:hover,
.page-about .about-hero__crumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .breadcrumb__sep {
  margin: 0 .55em;
  opacity: .55;
}

.page-about .about-hero__frame {
  position: relative;
  padding: clamp(30px, 5vw, 58px) clamp(20px, 4.5vw, 52px);
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 110% at 10% 0%, rgba(43, 232, 192, .11), transparent 58%),
    linear-gradient(158deg, rgba(11, 46, 38, .92), rgba(8, 32, 27, .96));
  overflow: hidden;
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 34px;
  height: 34px;
  border: 2px solid var(--cyan);
  opacity: .65;
  pointer-events: none;
}

.page-about .about-hero__frame::before {
  top: 14px;
  left: 14px;
  border-right: 0;
  border-bottom: 0;
  border-top-left-radius: 12px;
}

.page-about .about-hero__frame::after {
  right: 14px;
  bottom: 14px;
  border-top: 0;
  border-left: 0;
  border-bottom-right-radius: 12px;
}

.page-about .about-hero__title {
  margin: var(--space-2) 0 var(--space-3);
  max-width: 20ch;
  line-height: 1.1;
  color: var(--paper);
}

.page-about .about-hero__lede {
  max-width: 54ch;
  margin: 0;
  color: rgba(243, 247, 245, .82);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: var(--space-5) 0 0;
  padding: var(--space-4) 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-3);
}

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

.page-about .about-stat__num {
  font-family: var(--font-num);
  font-size: clamp(34px, 7vw, 54px);
  font-weight: 600;
  line-height: .92;
  letter-spacing: .015em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
}

/* ---------- 区块通用标题 ---------- */

.page-about .about-sec-head {
  max-width: 64ch;
  margin-bottom: var(--space-5);
}

.page-about .about-sec-head__lede {
  max-width: 52ch;
  margin: var(--space-2) 0 0;
  color: rgba(243, 247, 245, .78);
}

.page-about .about-sec-head--paper .about-sec-head__lede {
  color: rgba(11, 46, 38, .7);
}

/* ---------- 版本路线 ---------- */

.page-about .about-road__figure {
  margin: 0 0 var(--space-6);
}

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

.page-about .about-timeline__item {
  position: relative;
  padding-left: var(--about-item-pad);
  padding-bottom: var(--space-5);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: var(--about-axis-x);
  top: 12px;
  bottom: -4px;
  width: 1px;
  background: linear-gradient(180deg, var(--line-cyan), rgba(43, 232, 192, .05));
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: calc(var(--about-axis-x) - var(--about-node-size) / 2);
  top: 9px;
  width: var(--about-node-size);
  height: var(--about-node-size);
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(43, 232, 192, .09);
}

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

.page-about .about-timeline__item:last-child::before {
  display: none;
}

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

.page-about .about-node__summary {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "era cue"
    "title title";
  align-items: center;
  gap: 8px var(--space-2);
  padding: var(--space-2) 0 var(--space-3);
  cursor: pointer;
  list-style: none;
  border-bottom: 1px solid var(--line-soft);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-node__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-node__summary:hover,
.page-about .about-node__summary:focus-visible {
  border-bottom-color: var(--line-cyan);
}

.page-about .about-node__summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 4px;
}

.page-about .about-node__index {
  display: none;
  font-family: var(--font-num);
  font-size: 16px;
  letter-spacing: .12em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-node__title {
  grid-area: title;
  font-size: clamp(19px, 2.6vw, 25px);
  font-weight: 600;
  line-height: 1.34;
  color: var(--paper);
}

.page-about .about-node__era {
  grid-area: era;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--mist);
  white-space: nowrap;
}

.page-about .about-node__cue {
  grid-area: cue;
  position: relative;
  width: 24px;
  height: 24px;
  flex: none;
}

.page-about .about-node__cue::before,
.page-about .about-node__cue::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--mist);
  transform: translate(-50%, -50%);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-node__cue::before {
  width: 13px;
  height: 1px;
}

.page-about .about-node__cue::after {
  width: 1px;
  height: 13px;
}

.page-about .about-node[open] .about-node__cue::before {
  background: var(--cyan);
}

.page-about .about-node[open] .about-node__cue::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-about .about-node[open] .about-node__summary {
  border-bottom-color: transparent;
}

.page-about .about-node__body {
  padding: var(--space-3) 0 var(--space-3);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-node__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(243, 247, 245, .76);
}

/* ---------- 团队构成 ---------- */

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

.page-about .about-crew {
  padding: var(--space-4) var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  color: var(--paper);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-crew:hover,
.page-about .about-crew:focus-within {
  transform: translateY(-5px);
  box-shadow: 0 20px 44px rgba(5, 23, 19, .26);
}

.page-about .about-crew--data {
  background: var(--teal-800);
}

.page-about .about-crew--editor {
  background: var(--wine-800);
}

.page-about .about-crew--product {
  background: var(--ink-800);
}

.page-about .about-crew--support {
  background: var(--ink-700);
}

.page-about .about-crew__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(42px, 8vw, 66px);
  font-weight: 600;
  line-height: .9;
  letter-spacing: .01em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-crew__role {
  margin: var(--space-2) 0 var(--space-1);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: .04em;
}

.page-about .about-crew__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(243, 247, 245, .8);
}

.page-about .about-team__figure {
  margin: var(--space-6) 0 0;
}

/* ---------- 比分来源 ---------- */

.page-about .about-verify__grid {
  align-items: start;
}

.page-about .about-verify__prose p {
  margin: 0 0 var(--space-3);
}

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

.page-about .about-verify__side {
  margin-top: var(--space-4);
  padding: var(--space-3);
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-md);
  background: rgba(5, 23, 19, .3);
}

.page-about .about-verify__side-title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--paper);
}

.page-about .about-verify__list {
  list-style: none;
  margin: var(--space-2) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-verify__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(243, 247, 245, .16);
  font-size: 15px;
  color: rgba(243, 247, 245, .84);
}

.page-about .about-verify__list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-verify__list .num {
  min-width: 24px;
  font-family: var(--font-num);
  font-size: 18px;
  letter-spacing: .06em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-verify__side-note {
  margin: var(--space-3) 0 0;
  padding-top: var(--space-2);
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 为什么只留一块面板 ---------- */

.page-about .about-why__actions {
  list-style: none;
  counter-reset: why;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
  max-width: 72ch;
}

.page-about .about-why__actions li {
  position: relative;
  padding-left: 62px;
}

.page-about .about-why__actions li::before {
  counter-increment: why;
  content: "0" counter(why);
  position: absolute;
  left: 0;
  top: -4px;
  font-family: var(--font-num);
  font-size: 32px;
  line-height: 1;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .about-why__actions h3 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-why__actions p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(243, 247, 245, .76);
}

.page-about .about-why__tail {
  margin: var(--space-5) 0 0;
  max-width: 68ch;
  padding-top: var(--space-3);
  border-top: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.85;
  color: rgba(243, 247, 245, .78);
}

.page-about .about-why__tail a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 192, .4);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-why__tail a:hover,
.page-about .about-why__tail a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 长期服务 ---------- */

.page-about .about-promise__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.page-about .about-promise__lede {
  margin: var(--space-2) 0 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(243, 247, 245, .82);
}

.page-about .about-promise__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-about .about-promise__list li {
  padding: var(--space-3) 0 0;
  border-top: 1px solid rgba(243, 247, 245, .22);
}

.page-about .about-promise__list h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-promise__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(243, 247, 245, .8);
}

/* ---------- 结尾 ---------- */

.page-about .about-closing__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.page-about .about-closing__lede {
  margin: var(--space-3) 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(243, 247, 245, .8);
}

.page-about .about-closing__lede a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 192, .38);
}

.page-about .about-closing__lede a:hover,
.page-about .about-closing__lede a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-about .about-closing__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-verify__side {
    margin-top: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: var(--space-5);
  }

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

  .page-about .about-node__summary {
    grid-template-columns: auto 1fr auto;
    grid-template-areas: "index title cue";
    align-items: baseline;
    gap: var(--space-3);
    padding: var(--space-3) 0;
  }

  .page-about .about-node__index {
    display: block;
    grid-area: index;
  }

  .page-about .about-node__era {
    position: absolute;
    left: -96px;
    top: 14px;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    letter-spacing: .3em;
    font-size: 11px;
    color: var(--mist);
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-about .about-crew--data {
    grid-column: span 5;
  }

  .page-about .about-crew--editor {
    grid-column: span 3;
  }

  .page-about .about-crew--product {
    grid-column: span 4;
  }

  .page-about .about-crew--support {
    grid-column: span 12;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) minmax(0, 2fr);
    align-items: center;
    gap: var(--space-4);
  }

  .page-about .about-crew--support .about-crew__num {
    font-size: 62px;
  }

  .page-about .about-crew--support .about-crew__role {
    margin: 0;
  }

  .page-about .about-promise__grid {
    grid-template-columns: 5fr 7fr;
    gap: var(--space-6);
  }

  .page-about .about-closing__grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--space-6);
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__frame {
    padding-right: var(--space-6);
  }

  .page-about .about-node__era {
    left: -104px;
  }
}

@media (max-width: 560px) {
  .page-about .about-hero__frame::before,
  .page-about .about-hero__frame::after {
    width: 20px;
    height: 20px;
  }

  .page-about .about-why__actions li {
    padding-left: 50px;
  }

  .page-about .about-why__actions li::before {
    font-size: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-crew,
  .page-about .about-node__summary,
  .page-about .about-node__cue::before,
  .page-about .about-node__cue::after {
    transition: none;
  }

  .page-about .about-crew:hover,
  .page-about .about-crew:focus-within {
    transform: none;
  }
}
<<<END>>>