.page-about {
  --about-gap: 56px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .about-wrap {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 面包屑 */
.page-about .about-crumb {
  padding-top: 16px;
  padding-bottom: 6px;
}

.page-about .about-crumb__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--text-soft);
}

.page-about .about-crumb__list a {
  color: var(--teal-700);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .about-crumb__list a:hover {
  border-bottom-color: var(--teal-500);
}

.page-about .about-crumb__list [aria-current="page"] {
  color: var(--text-soft);
}

/* 通用标题与标签 */
.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--teal-700);
}

.page-about .about-kicker::before {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  background: var(--ember-500);
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 4.8vw, 34px);
  line-height: 1.32;
  letter-spacing: 0.01em;
  color: var(--teal-700);
  margin: 0 0 12px;
}

.page-about .about-head {
  max-width: 720px;
}

.page-about .about-lede {
  margin: 0;
  max-width: 34em;
  font-size: 15.5px;
  color: var(--text-soft);
}

.page-about .about-sec {
  padding: var(--about-gap) 0;
}

.page-about .about-prose p {
  margin: 0 0 16px;
  max-width: 34em;
  font-size: 16px;
  color: var(--text);
}

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

.page-about .about-prose-lead {
  margin: 0 0 20px;
  max-width: 34em;
  font-size: 15.5px;
  color: var(--text-soft);
}

/* 按钮 */
.page-about .about-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.page-about .about-btn--ember {
  background: var(--ember-500);
  color: var(--on-accent);
}

.page-about .about-btn--ember:hover {
  background: #C6511F;
  transform: translateY(-1px);
}

.page-about .about-btn--ghost {
  color: var(--teal-700);
  border-color: var(--teal-200);
  background: transparent;
}

.page-about .about-btn--ghost:hover {
  border-color: var(--teal-500);
  background: rgba(31, 114, 134, 0.07);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding-top: 10px;
}

.page-about .about-hero__panel {
  background:
    radial-gradient(circle at 84% 10%, rgba(31, 114, 134, 0.55), transparent 58%),
    var(--ink-teal-900);
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
  padding: 38px 0 78px;
}

.page-about .about-hero__inner {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 20px;
}

.page-about .about-hero__copy {
  max-width: 640px;
}

.page-about .about-hero .about-kicker {
  color: var(--ember-200);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(27px, 6.4vw, 50px);
  line-height: 1.24;
  letter-spacing: 0.01em;
  color: var(--on-deep);
  margin: 0 0 18px;
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 3.7vw, 17px);
  color: rgba(243, 235, 221, 0.82);
}

.page-about .about-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 7px;
  font-size: 13px;
  color: rgba(243, 235, 221, 0.7);
}

.page-about .about-hero__facts span {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--ember-200);
}

.page-about .about-hero__figure {
  position: relative;
  z-index: 2;
  max-width: var(--content-max);
  margin: -54px auto 0;
  padding: 0 20px;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-organic);
  box-shadow: 0 26px 60px -32px rgba(11, 46, 59, 0.6);
}

/* 定位段落 */
.page-about .about-pitch {
  padding-top: 46px;
}

.page-about .about-pitch__grid {
  display: grid;
  gap: 20px;
}

/* 时间线 */
.page-about .about-timeline {
  background: var(--paper-50);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: var(--about-gap) 0;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 12px;
  bottom: 18px;
  width: 2px;
  background: linear-gradient(180deg, var(--teal-500), var(--teal-200));
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 44px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 17px;
  width: 20px;
  height: 20px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--paper-50);
  border: 2px solid var(--ember-500);
  z-index: 1;
}

.page-about .tl-node summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  padding: 14px 0;
  cursor: pointer;
  list-style: none;
  outline-offset: 4px;
}

.page-about .tl-node summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-node__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ember-500);
}

.page-about .tl-node__when {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--teal-700);
  padding: 1px 8px;
  border: 1px solid var(--teal-200);
  border-radius: 999px;
}

.page-about .tl-node__title {
  flex: 1 1 auto;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
}

.page-about .tl-node__sign {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--teal-500);
}

.page-about .tl-node__sign::before {
  content: "+";
}

.page-about .tl-node[open] .tl-node__sign::before {
  content: "–";
}

.page-about .tl-node__body {
  padding: 0 0 18px;
}

.page-about .tl-node__body p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  color: var(--text-soft);
}

/* 分工卡片 */
.page-about .about-teams__grid {
  list-style: none;
  display: grid;
  gap: 16px;
  margin: 30px 0 0;
  padding: 0;
  align-items: start;
}

.page-about .team-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal-500);
  border-radius: var(--radius-organic);
  padding: 20px 18px 22px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.page-about .team-card:hover {
  transform: translateY(-4px);
  border-top-color: var(--ember-500);
  box-shadow: 0 20px 38px -26px rgba(11, 46, 59, 0.65);
}

.page-about .team-card__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--teal-500);
  margin-bottom: 12px;
}

.page-about .team-card__name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  color: var(--ink-teal-900);
  margin: 0 0 8px;
}

.page-about .team-card__role {
  margin: 0 0 16px;
  font-size: 14.5px;
  color: var(--text-soft);
}

.page-about .team-card__stat {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-strong);
  font-size: 13px;
  color: var(--text-soft);
}

.page-about .team-card__stat strong {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--ember-500);
  margin-bottom: 2px;
}

/* 流程 */
.page-about .about-flow {
  position: relative;
  overflow: hidden;
  background: var(--ink-teal-900);
  color: var(--on-deep);
  padding: var(--about-gap) 0;
}

.page-about .about-flow::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(169, 203, 211, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(169, 203, 211, 0.09) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

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

.page-about .about-flow .about-kicker {
  color: var(--ember-200);
}

.page-about .about-flow .about-h2 {
  color: var(--on-deep);
}

.page-about .about-flow .about-lede {
  color: rgba(243, 235, 221, 0.72);
}

.page-about .about-flow__grid {
  display: grid;
  gap: 32px;
  margin-top: 32px;
}

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

.page-about .flow-step {
  position: relative;
  padding-left: 22px;
  padding-bottom: 26px;
  border-left: 2px solid rgba(169, 203, 211, 0.3);
}

.page-about .flow-step:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .flow-step::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ember-500);
  box-shadow: 0 0 0 4px rgba(228, 99, 42, 0.18);
}

.page-about .flow-step__time {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ember-200);
}

.page-about .flow-step__what {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 17px;
  color: #FFFFFF;
}

.page-about .flow-step__who {
  margin: 0;
  font-size: 14.5px;
  color: rgba(243, 235, 221, 0.72);
  max-width: 32em;
}

.page-about .flow-step__arrow {
  display: block;
  width: 18px;
  height: 18px;
  margin-top: 12px;
  color: var(--teal-200);
}

.page-about .flow-step:last-child .flow-step__arrow {
  display: none;
}

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

.page-about .about-flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 380px;
  object-fit: cover;
  border-radius: var(--radius-organic);
  border: 1px solid rgba(169, 203, 211, 0.3);
}

.page-about .about-flow__figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  color: rgba(243, 235, 221, 0.6);
}

/* 数据来源 */
.page-about .about-source__grid {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.page-about .source-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--teal-500);
  border-radius: var(--radius-organic);
  padding: 20px;
}

.page-about .source-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
  color: var(--ink-teal-900);
}

.page-about .source-card p {
  margin: 0;
  max-width: 32em;
  font-size: 15px;
  color: var(--text-soft);
}

.page-about .source-card--wide {
  border-left-color: var(--ember-500);
  background: var(--bg-sunk);
}

/* 本地服务 */
.page-about .about-local {
  background: var(--paper-50);
  border-top: 1px solid var(--line);
}

.page-about .about-local__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-local__list {
  list-style: none;
  display: grid;
  gap: 10px;
  margin: 0 0 24px;
  padding: 0;
}

.page-about .about-local__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line-strong);
  font-size: 15px;
  color: var(--text);
}

.page-about .about-local__label {
  min-width: 76px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--teal-500);
  align-self: center;
}

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

.page-about .about-local__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-organic);
}

/* 结尾行动 */
.page-about .about-cta {
  background: var(--ink-teal-900);
  padding: 48px 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 24px;
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 4.2vw, 30px);
  line-height: 1.32;
  color: var(--on-deep);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 32em;
  font-size: 15px;
  color: rgba(243, 235, 221, 0.72);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta .about-btn--ghost {
  color: var(--on-deep);
  border-color: rgba(169, 203, 211, 0.45);
}

.page-about .about-cta .about-btn--ghost:hover {
  background: rgba(169, 203, 211, 0.12);
  border-color: var(--teal-200);
}

/* 窄屏收口 */
@media (max-width: 420px) {
  .page-about .about-hero__facts {
    gap: 8px 18px;
  }

  .page-about .about-local__label {
    min-width: 100%;
  }
}

/* 中等宽度 */
@media (min-width: 720px) {
  .page-about .about-teams__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

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

  .page-about .source-card--wide {
    grid-column: 1 / -1;
  }
}

/* 桌面 */
@media (min-width: 900px) {
  .page-about {
    --about-gap: 80px;
  }

  .page-about .about-wrap {
    padding-left: 32px;
    padding-right: 32px;
  }

  .page-about .about-hero__inner,
  .page-about .about-hero__figure {
    padding-left: 32px;
    padding-right: 32px;
  }

  .page-about .about-hero__panel {
    padding: 56px 0 96px;
  }

  .page-about .about-pitch__grid {
    grid-template-columns: 0.82fr 1.18fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-flow__grid {
    grid-template-columns: 1.3fr 0.7fr;
    gap: 54px;
    align-items: start;
  }

  .page-about .about-flow__figure img {
    max-height: none;
  }

  .page-about .about-local__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 48px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 40px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-teams__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    padding-bottom: 26px;
  }

  .page-about .team-card:nth-child(2),
  .page-about .team-card:nth-child(4) {
    margin-top: 26px;
  }
}

/* 降低动效 */
@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .about-btn {
    transition: none;
  }

  .page-about .team-card:hover,
  .page-about .about-btn--ember:hover {
    transform: none;
  }
}