.page-about {
  --about-violet-wash: radial-gradient(120% 90% at 10% -14%, rgba(123, 91, 255, .26), transparent 62%);
  --about-warm-wash: linear-gradient(140deg, rgba(255, 138, 61, .18), rgba(255, 138, 61, 0) 54%);
  --about-cyan-wash: radial-gradient(100% 120% at 92% 0%, rgba(47, 243, 208, .15), transparent 60%);
  --about-tile: rgba(6, 11, 26, .55);
}

/* -------------------------------------------------
   面包屑
   ------------------------------------------------- */
.page-about .breadcrumbs {
  margin-top: clamp(14px, 2.6vw, 26px);
}

/* -------------------------------------------------
   首屏
   ------------------------------------------------- */
.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4.5vw, 46px);
  align-items: start;
}

.page-about .about-hero__lead {
  max-width: 46em;
}

.page-about .about-hero__lead .display-1 {
  margin: 14px 0 18px;
  font-size: clamp(31px, 6.4vw, 56px);
  line-height: 1.16;
  letter-spacing: -.02em;
}

.page-about .about-hero__facts {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--about-violet-wash), var(--panel);
  padding: clamp(18px, 3vw, 26px);
  box-shadow: var(--shadow-soft);
}

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

.page-about .about-fact {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 16px;
  padding-block: 13px;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-fact:first-child {
  padding-top: 0;
}

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

.page-about .about-fact__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--text-muted);
}

.page-about .about-fact__value {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--text-strong);
}

/* -------------------------------------------------
   发展阶段
   ------------------------------------------------- */
.page-about .about-timeline__head .display-2,
.page-about .about-archive__head .display-2 {
  margin: 12px 0 16px;
}

.page-about .about-timeline__head .lede,
.page-about .about-archive__head .lede {
  max-width: 42em;
}

.page-about .about-timeline__media {
  margin-top: clamp(26px, 4.5vw, 46px);
  aspect-ratio: 7 / 4;
  border-radius: var(--radius-xl);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: clamp(30px, 5vw, 54px) 0 0;
  padding: 0;
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px 28px;
  padding-block: clamp(22px, 3.4vw, 34px);
  border-top: 1px solid var(--line);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: clamp(48px, 9vw, 96px);
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--stage, var(--cyan-400)), transparent);
}

.page-about .about-timeline__item:nth-child(1) { --stage: var(--cyan-400); }
.page-about .about-timeline__item:nth-child(2) { --stage: var(--violet-500); }
.page-about .about-timeline__item:nth-child(3) { --stage: var(--orange-500); }
.page-about .about-timeline__item:nth-child(4) { --stage: var(--green-400); }

.page-about .about-timeline__year {
  font-size: clamp(30px, 5vw, 48px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--text-muted);
  transition: color .3s ease, transform .3s ease;
}

.page-about .about-timeline__item:hover .about-timeline__year,
.page-about .about-timeline__item:focus-within .about-timeline__year {
  color: var(--stage, var(--cyan-400));
  transform: translateX(6px);
}

.page-about .about-timeline__body h3 {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.5vw, 26px);
  font-weight: 800;
  letter-spacing: -.015em;
  color: var(--text-strong);
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 44em;
  line-height: 1.85;
  color: var(--text);
}

/* -------------------------------------------------
   编辑团队
   ------------------------------------------------- */
.page-about .about-team__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: center;
}

.page-about .about-team__intro .display-2 {
  margin: 12px 0 16px;
}

.page-about .about-team__intro .lede {
  max-width: 42em;
}

.page-about .about-team__media {
  aspect-ratio: 10 / 7;
  border-radius: var(--radius-xl);
}

.page-about .about-team__cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 22px);
  margin-top: clamp(26px, 4.5vw, 48px);
}

.page-about .about-team__card {
  padding: clamp(20px, 2.8vw, 30px);
  border-radius: var(--radius-lg);
  transition: transform .3s ease, border-color .3s ease;
}

.page-about .about-team__card:hover {
  transform: translateY(-4px);
  border-color: rgba(47, 243, 208, .42);
}

.page-about .about-team__index {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan-400);
}

.page-about .about-team__card h3 {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.2vw, 23px);
  font-weight: 800;
  color: var(--text-strong);
}

.page-about .about-team__card p:not(.about-team__index) {
  margin: 0;
  line-height: 1.8;
  color: var(--text);
}

/* -------------------------------------------------
   归档规范
   ------------------------------------------------- */
.page-about .about-archive__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(26px, 4.5vw, 48px);
  align-items: start;
}

.page-about .about-archive__media {
  aspect-ratio: 12 / 7;
  border-radius: var(--radius-xl);
}

.page-about .about-archive__chips {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.page-about .about-archive__body p {
  margin: 0 0 16px;
  max-width: 44em;
  line-height: 1.85;
  color: var(--text);
}

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

/* -------------------------------------------------
   复核与替换
   ------------------------------------------------- */
.page-about .about-review__grid {
  gap: clamp(24px, 4vw, 46px);
  align-items: start;
}

.page-about .about-review__body .display-2 {
  margin: 12px 0 18px;
}

.page-about .about-review__body p {
  margin: 0 0 16px;
  max-width: 42em;
  line-height: 1.85;
  color: var(--text);
}

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

.page-about .about-review__aside {
  padding: clamp(20px, 2.8vw, 28px);
  border-radius: var(--radius-lg);
}

.page-about .about-review__label {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan-400);
}

.page-about .about-review__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-review__list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-review__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan-400);
}

.page-about .about-review__list .mono {
  margin-right: 6px;
  font-weight: 700;
  color: var(--text-strong);
}

.page-about .about-review__note {
  margin: 0;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* -------------------------------------------------
   服务范围
   ------------------------------------------------- */
.page-about .about-service__panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    var(--about-warm-wash),
    var(--about-cyan-wash),
    var(--panel);
  padding: clamp(24px, 4vw, 48px);
  box-shadow: var(--shadow-soft);
}

.page-about .about-service__head .display-2 {
  margin: 12px 0 16px;
}

.page-about .about-service__head .lede {
  max-width: 34em;
}

.page-about .about-service__body > p {
  margin: 0 0 20px;
  max-width: 40em;
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-service__contacts {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--about-tile);
}

.page-about .about-contact__label {
  min-width: 68px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--text-muted);
}

.page-about .about-contact__value {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-strong);
  overflow-wrap: anywhere;
}

.page-about .about-contact__copy {
  flex: 0 0 auto;
  padding: 6px 15px;
  font-size: 13px;
}

/* -------------------------------------------------
   通用零件
   ------------------------------------------------- */
.page-about .media > .media__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-link {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 208, .38);
  transition: color .25s ease, border-color .25s ease;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--frost-100);
  border-bottom-color: var(--frost-100);
}

.page-about .about-link:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
}

/* -------------------------------------------------
   响应式
   ------------------------------------------------- */
@media (min-width: 760px) {
  .page-about .about-timeline__item {
    grid-template-columns: minmax(140px, 200px) minmax(0, 1fr);
    gap: 0 36px;
  }

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

  .page-about .about-team__card:nth-child(2) {
    margin-top: clamp(20px, 3.6vw, 46px);
  }

  .page-about .about-team__card:nth-child(3) {
    margin-top: clamp(8px, 1.6vw, 20px);
  }
}

@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.92fr);
  }

  .page-about .about-team__top {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  }

  .page-about .about-archive__layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
  }

  .page-about .about-service__panel {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(24px, 4vw, 52px);
    align-items: start;
  }
}

@media (max-width: 420px) {
  .page-about .about-contact__value {
    font-size: 14px;
  }

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