.page-about {
  --about-shadow: var(--shadow-panel);
}

/* ---------- 通用小节标题 ---------- */
.page-about .about-head {
  max-width: 62ch;
  margin-bottom: 28px;
}

.page-about .about-head h2 {
  margin: 10px 0 12px;
  font-size: clamp(23px, 3.4vw, 33px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-head__lead {
  margin: 0;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.78;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 22px;
}

.page-about .about-hero .crumbs {
  margin: 0 0 18px;
}

.page-about .about-hero__frame {
  position: relative;
  padding: 32px 22px 24px;
  border-radius: var(--r-md);
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-hero h1 {
  margin: 12px 0 16px;
  font-size: clamp(29px, 6vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-hero__lead {
  max-width: 54ch;
  margin: 0;
  color: var(--text);
  font-size: 17px;
  line-height: 1.8;
}

.page-about .about-hero__note {
  margin: 16px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--accent);
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.72;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  overflow: hidden;
  background: var(--bg);
}

.page-about .about-hero__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 适用人群 ---------- */
.page-about .audience__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .audience__item {
  position: relative;
  padding: 22px 20px;
  border-radius: var(--r-md);
  border-top: 2px solid var(--accent);
  transition: transform var(--t-base) var(--ease-out),
    border-color var(--t-base) var(--ease-out),
    box-shadow var(--t-base) var(--ease-out);
}

.page-about .audience__item:hover {
  transform: translateY(-2px);
  border-top-color: var(--flare);
  box-shadow: var(--about-shadow);
}

.page-about .audience__no {
  display: block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent-soft);
}

.page-about .audience__title {
  margin: 10px 0 8px;
  font-size: 18px;
  line-height: 1.32;
  color: var(--text);
}

.page-about .audience__text {
  margin: 0;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.78;
}

/* ---------- 版本时间线 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .timeline__item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 12px;
}

.page-about .timeline__axis {
  position: relative;
  padding-top: 2px;
}

.page-about .timeline__axis::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 36px;
  bottom: -20px;
  width: 1px;
  background: var(--line);
}

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

.page-about .timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--accent-soft);
}

.page-about .timeline__node {
  display: block;
  width: 12px;
  height: 12px;
  margin-top: 9px;
  background: var(--bg);
  border: 2px solid var(--line);
  transform: rotate(45deg);
  transition: background var(--t-fast) var(--ease-out),
    border-color var(--t-fast) var(--ease-out);
}

.page-about .timeline__item:hover .timeline__node,
.page-about .timeline__item:focus-within .timeline__node {
  background: var(--accent);
  border-color: var(--accent);
}

.page-about .timeline__body {
  padding: 18px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: border-color var(--t-base) var(--ease-out),
    transform var(--t-base) var(--ease-out);
}

.page-about .timeline__item:hover .timeline__body,
.page-about .timeline__item:focus-within .timeline__body {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.page-about .timeline__tag {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--flare);
}

.page-about .timeline__title {
  margin: 8px 0 10px;
  font-size: 18px;
  line-height: 1.34;
  color: var(--text);
}

.page-about .timeline__text {
  margin: 0;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .timeline__note {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mint-tint);
  opacity: 0.76;
  transition: opacity var(--t-fast) var(--ease-out);
}

.page-about .timeline__item:hover .timeline__note,
.page-about .timeline__item:focus-within .timeline__note {
  opacity: 1;
}

/* ---------- 团队分工 ---------- */
.page-about .team__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .team__main h2 {
  margin: 10px 0 14px;
  font-size: clamp(23px, 3.4vw, 33px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .team__intro {
  margin: 0;
  max-width: 60ch;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .team__flow {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-about .team__row {
  padding: 16px 18px;
  background: var(--surface-raise);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}

.page-about .team__row--alt {
  border-left-color: var(--flare);
}

.page-about .team__rowhead {
  margin: 0 0 6px;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--text);
}

.page-about .team__rowtext {
  margin: 0;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.76;
}

.page-about .team__result {
  margin: 20px 0 0;
  padding: 16px 18px;
  background: var(--cream);
  color: var(--field-ink);
  border-radius: var(--r-sm);
  font-size: 15px;
  line-height: 1.72;
}

.page-about .team__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--bg);
}

.page-about .team__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 内容覆盖 ---------- */
.page-about .coverage__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .coverage__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--bg);
}

.page-about .coverage__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .coverage__body h2 {
  margin: 10px 0 12px;
  font-size: clamp(23px, 3.4vw, 33px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .coverage__lead {
  margin: 0;
  max-width: 58ch;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.78;
}

.page-about .coverage__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 22px 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.page-about .coverage__stat {
  padding: 16px 14px;
  background: var(--surface);
}

.page-about .coverage__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--text-dim);
}

.page-about .coverage__value {
  display: block;
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 4.4vw, 33px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.page-about .coverage__unit {
  margin-left: 6px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mint-tint);
}

.page-about .coverage__note {
  margin: 18px 0 0;
  max-width: 64ch;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.8;
}

.page-about .coverage__note a {
  color: var(--accent-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .coverage__note a:hover {
  color: var(--neon-pitch);
}

/* ---------- 辽宁本地 ---------- */
.page-about .about-local h2 {
  margin: 10px 0 18px;
  font-size: clamp(23px, 3.4vw, 33px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .local__body {
  display: grid;
  gap: 14px;
  max-width: 68ch;
}

.page-about .local__body p {
  margin: 0;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.82;
}

.page-about .local__chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .local__chips li {
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--surface);
  color: var(--accent-soft);
  font-size: 13px;
  letter-spacing: 0.06em;
}

/* ---------- 长期使用的理由 ---------- */
.page-about .reasons__list {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .reasons__item {
  padding: 20px 18px;
  background: var(--surface);
  transition: background var(--t-base) var(--ease-out);
}

.page-about .reasons__item:hover {
  background: var(--surface-raise);
}

.page-about .reasons__item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.34;
  color: var(--text);
}

.page-about .reasons__item p {
  margin: 0;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.78;
}

/* ---------- 收束 ---------- */
.page-about .about-cta__box {
  padding: 26px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(135deg, var(--panel-raise) 0%, var(--surface) 100%);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 66ch;
  color: var(--text);
  font-size: 16px;
  line-height: 1.82;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 700px) {
  .page-about .audience__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .timeline__item {
    grid-template-columns: 80px minmax(0, 1fr);
    gap: 18px;
  }

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

  .page-about .timeline__body {
    padding: 22px 22px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__frame {
    padding: 44px 40px 38px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 1fr);
    align-items: center;
    gap: 38px;
  }

  .page-about .team__split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
    align-items: start;
    gap: 38px;
  }

  .page-about .coverage__grid {
    grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
    align-items: center;
    gap: 38px;
  }

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

  .page-about .reasons__item {
    padding: 24px 22px;
  }

  .page-about .about-cta__box {
    padding: 34px 32px;
  }
}