/* =========================================================
   平台介绍页 — page-about
   移动优先，作用域全部限定在 .page-about
   ========================================================= */

.page-about {
  --about-meter-h: 3px;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  margin-top: clamp(16px, 3vw, 30px);
  margin-bottom: 0;
}

/* ---------- 刊头式定位段 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: clamp(28px, 5vw, 58px);
  padding-bottom: clamp(44px, 7vw, 92px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -12%;
  width: min(560px, 68vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 224, 208, 0.16), transparent 66%);
  filter: blur(6px);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-hero__title {
  margin: clamp(14px, 2vw, 24px) 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 7.4vw, 86px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
  text-shadow:
    0 0 30px rgba(255, 201, 74, 0.13),
    0 0 64px rgba(79, 224, 208, 0.1);
}

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

.page-about .about-hero__line:last-child {
  color: var(--gold);
}

.page-about .about-hero__lede {
  margin: clamp(22px, 3.5vw, 38px) 0 0;
  max-width: 60ch;
  color: var(--muted);
  line-height: 1.9;
}

/* 关键数据条 */
.page-about .about-hero__stats {
  margin-top: clamp(30px, 5vw, 56px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2.4vw, 22px);
}

.page-about .about-hero__stats .data-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .data-card__num {
  font-family: var(--font-mono);
  font-size: clamp(34px, 5.4vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .data-card--teal .data-card__num {
  color: var(--teal);
}

.page-about .data-card__label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-meter {
  display: block;
  width: 100%;
  height: var(--about-meter-h);
  margin-top: 4px;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
}

.page-about .about-meter i {
  display: block;
  height: 100%;
  width: var(--fill, 50%);
  border-radius: 999px;
  background: linear-gradient(90deg, var(--gold-dim), var(--gold));
}

.page-about .about-meter--teal i {
  background: linear-gradient(90deg, var(--teal-dim), var(--teal));
}

/* ---------- 章节通用 ---------- */
.page-about .section-marker {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .section-marker .mono {
  font-size: clamp(32px, 5vw, 54px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--line);
  transition: color 0.35s ease, text-shadow 0.35s ease;
}

.page-about .section-marker::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(90deg, var(--gold-dim), rgba(255, 201, 74, 0.12) 55%, transparent);
}

.page-about [data-section].is-current .section-marker .mono {
  color: var(--gold);
  text-shadow: 0 0 22px rgba(255, 201, 74, 0.35);
}

.page-about .about-h2 {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 3.6vw, 40px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-h2--wide {
  max-width: 22ch;
}

.page-about .about-lead {
  margin: 0 0 clamp(24px, 3.6vw, 42px);
  max-width: 58ch;
  color: var(--muted);
  font-size: clamp(16px, 1.6vw, 18px);
}

/* 快读带 / 慢读带 */
.page-about .prose-fast {
  line-height: 1.6;
}

.page-about .prose-slow {
  line-height: 2.05;
}

.page-about .about-side-note {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

/* ---------- 四类内容分区 ---------- */
.page-about .about-map__head {
  margin-bottom: clamp(24px, 3.6vw, 40px);
}

.page-about .about-map__head .about-h2 {
  margin-bottom: 0;
}

.page-about .about-map {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2.2vw, 20px);
}

.page-about .about-map__cell {
  display: block;
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  background: var(--panel);
  border: 1px solid var(--line);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}

.page-about .about-map__cell--a { border-radius: var(--radius-a); }
.page-about .about-map__cell--b { border-radius: var(--radius-b); }
.page-about .about-map__cell--c { border-radius: 24px 24px 6px 24px; }
.page-about .about-map__cell--d { border-radius: 6px 24px 24px 6px; }

.page-about .about-map__cell:hover,
.page-about .about-map__cell:focus-visible {
  border-color: var(--gold-dim);
  background: #13151c;
  transform: translateY(-2px);
}

.page-about .about-map__no {
  display: block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--teal);
  margin-bottom: 14px;
}

.page-about .about-map__cell h3 {
  margin: 0 0 12px;
  font-size: clamp(19px, 2.3vw, 24px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--text);
}

.page-about .about-map__cell p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-map__freq {
  display: block;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline__figure {
  margin: 0 0 clamp(30px, 5vw, 56px);
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 24px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold-dim), var(--teal-dim) 52%, transparent);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(28px, 4vw, 46px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(255, 201, 74, 0.08);
  transition: background-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  background: var(--gold);
  box-shadow: 0 0 16px rgba(255, 201, 74, 0.55);
}

.page-about .about-timeline__phase {
  display: block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--teal);
  margin-bottom: 10px;
}

.page-about .about-timeline__item h3 {
  margin: 0 0 10px;
  font-size: clamp(18px, 2.1vw, 22px);
  font-weight: 800;
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-timeline__item p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-timeline__hint {
  display: block;
  margin-top: 12px;
  padding-left: 12px;
  border-left: 1px solid var(--gold-dim);
  font-size: 13px;
  line-height: 1.7;
  color: var(--gold);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.page-about .about-timeline__item:hover .about-timeline__hint,
.page-about .about-timeline__item:focus-within .about-timeline__hint {
  opacity: 1;
  transform: translateX(0);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  align-items: start;
}

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

.page-about .about-roles {
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  padding: clamp(16px, 2.4vw, 22px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold-dim);
  border-radius: 0 var(--radius-c) var(--radius-c) 0;
  transition: border-color 0.18s ease;
}

.page-about .about-role--teal {
  border-left-color: var(--teal-dim);
}

.page-about .about-role:hover {
  border-color: var(--gold-dim);
}

.page-about .about-role__key {
  display: block;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin-bottom: 10px;
}

.page-about .about-role--teal .about-role__key {
  color: var(--teal);
}

.page-about .about-role p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__lead .about-h2 {
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-about .about-partners__text {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2.2vw, 20px);
}

.page-about .about-partner-card {
  padding: clamp(18px, 2.6vw, 26px);
  background: linear-gradient(150deg, #131620, var(--panel) 70%);
  border: 1px solid var(--line);
  border-radius: var(--radius-b);
  transition: border-color 0.18s ease;
}

.page-about .about-partner-card--teal {
  border-radius: var(--radius-a);
}

.page-about .about-partner-card:hover {
  border-color: var(--teal-dim);
}

.page-about .about-partner-card__k {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--teal);
  margin-bottom: 12px;
}

.page-about .about-partner-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 服务承诺 ---------- */
.page-about .about-promise {
  align-items: start;
}

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

.page-about .about-promise__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .about-promise__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  padding: clamp(16px, 2.4vw, 22px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-promise__item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-promise__no {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--gold);
  padding-top: 3px;
}

.page-about .about-promise__item h3 {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 800;
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-promise__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
  word-break: break-word;
}

/* ---------- 继续了解 ---------- */
.page-about .about-next {
  padding-top: clamp(48px, 7vw, 88px);
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .about-next__title {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--muted);
}

.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-next__list > li {
  border-bottom: 1px solid var(--line);
}

.page-about .about-next__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: center;
  padding: clamp(15px, 2.2vw, 22px) 4px;
  color: var(--text);
  text-decoration: none;
  transition: color 0.18s ease, padding-left 0.18s ease, background-color 0.18s ease;
}

.page-about .about-next__item:hover,
.page-about .about-next__item:focus-visible {
  color: var(--gold);
  padding-left: 14px;
  background: rgba(255, 201, 74, 0.04);
}

.page-about .about-next__no {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--teal);
}

.page-about .about-next__label {
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.6;
}

/* ---------- 图片通用 ---------- */
.page-about .figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-c);
}

.page-about .figure--wide img {
  aspect-ratio: 21 / 9;
}

.page-about .figure--square img {
  aspect-ratio: 1 / 1;
}

.page-about .figure--tall img {
  aspect-ratio: 4 / 5;
}

.page-about .figure__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* =========================================================
   媒体查询
   ========================================================= */

@media (min-width: 560px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-partner-card:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 760px) {
  .page-about .about-timeline__figure .figure__caption {
    max-width: 48ch;
  }

  .page-about .about-map {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: start;
    column-gap: clamp(16px, 2.4vw, 26px);
    row-gap: clamp(18px, 2.6vw, 28px);
  }

  .page-about .about-map__cell--a {
    grid-column: 1 / span 7;
  }

  .page-about .about-map__cell--b {
    grid-column: 8 / span 5;
    margin-top: 52px;
  }

  .page-about .about-map__cell--c {
    grid-column: 1 / span 5;
  }

  .page-about .about-map__cell--d {
    grid-column: 6 / span 7;
    margin-top: 46px;
  }

  .page-about .about-timeline {
    padding-left: 34px;
  }

  .page-about .about-timeline__item::before {
    left: -34px;
  }

  .page-about .about-timeline::before {
    left: 5px;
  }

  .page-about .about-timeline__hint {
    max-width: 46ch;
  }

  .page-about .about-partners__grid {
    grid-template-columns: 1fr;
  }

  .page-about .about-partner-card:last-child {
    grid-column: auto;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: clamp(40px, 5vw, 64px);
  }

  .page-about .about-hero__lede {
    max-width: 52ch;
  }

  .page-about .about-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(22px, 3vw, 40px);
    border-top: 0;
  }

  .page-about .about-next__list > li {
    border-top: 1px solid var(--line);
  }
}

@media (min-width: 1100px) {
  .page-about .about-timeline {
    max-width: 78ch;
  }
}

/* ---------- 尊重减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-map__cell,
  .page-about .about-timeline__item::before,
  .page-about .about-timeline__hint,
  .page-about .about-next__item,
  .page-about .section-marker .mono {
    transition: none;
  }

  .page-about .about-map__cell:hover,
  .page-about .about-map__cell:focus-visible {
    transform: none;
  }

  .page-about .about-timeline__hint {
    opacity: 1;
    transform: none;
  }
}
<<<END>>>

.page-about {
  --fill: currentColor;
}