.page-about {
  --about-sect: clamp(48px, 8vw, 96px);
  --about-hair: 2px solid var(--edge);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-bottom: clamp(36px, 6vw, 64px);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 5vw, 52px);
  align-items: end;
  padding-top: clamp(20px, 4vw, 44px);
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(280px, 1fr);
  }
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 6.6vw, 4rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--white);
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 3vw, 26px) 0 0;
  max-width: 36em;
  color: var(--steel);
}

.page-about .hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .hero-stat {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 18px;
  background: var(--ink-800);
  border: var(--about-hair);
  border-left: 4px solid var(--orange);
  border-radius: 12px;
}

.page-about .hero-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3.6vw, 1.8rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--orange);
  min-width: 3.4ch;
}

.page-about .hero-stat__cap {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--steel);
}

/* ---------- 章节索引 ---------- */
.page-about .about-toc {
  margin-top: clamp(28px, 5vw, 48px);
  padding-top: 20px;
  border-top: var(--about-hair);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 24px;
}

.page-about .about-toc__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
}

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

.page-about .about-toc__link {
  display: inline-block;
  padding-bottom: 3px;
  color: var(--white);
  font-size: 0.94rem;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 区块骨架 ---------- */
.page-about .about-section {
  padding: var(--about-sect) 0;
  scroll-margin-top: 108px;
}

.page-about .about-head {
  max-width: 46em;
  margin-bottom: clamp(26px, 4.5vw, 48px);
}

.page-about .about-head__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4.4vw, 2.85rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-head__lede {
  margin: 16px 0 0;
  max-width: 40em;
  color: var(--steel);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(28px, 4.5vw, 44px);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--about-hair);
  border-radius: var(--radius-card);
  background: var(--ink-800);
}

.page-about .about-figure__cap {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--steel);
}

/* ---------- 纵向时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 26px;
  bottom: 30px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--edge) 48%, var(--ink-600) 100%);
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 40px) 42px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  width: 14px;
  height: 14px;
  border: 3px solid var(--orange);
  border-radius: 50%;
  background: var(--ink-900);
  box-shadow: 0 0 0 5px rgba(255, 106, 43, 0.12);
  z-index: 1;
}

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

.page-about .tl-phase {
  margin: 0 0 8px;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .tl-phase__code {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-about .tl-phase__name {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
  border: 1px solid var(--edge);
  border-radius: var(--radius-pill);
  padding: 2px 10px;
}

.page-about .tl-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.4vw, 1.36rem);
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .tl-text {
  margin: 0;
  max-width: 44em;
  color: var(--steel);
  font-size: 0.96rem;
  line-height: 1.76;
}

@media (min-width: 900px) {
  .page-about .tl-item {
    padding-left: 56px;
  }
  .page-about .tl::before {
    left: 12px;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
}

@media (min-width: 900px) {
  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }
}

.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .team-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 20px 22px;
  background: var(--ink-800);
  border: var(--about-hair);
  border-radius: var(--radius-card);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .team-item:hover {
  transform: translateY(-3px);
  border-color: var(--orange);
}

.page-about .team-item__num {
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 4vw, 2.1rem);
  font-weight: 600;
  line-height: 1;
  color: var(--orange);
  min-width: 2.4ch;
}

.page-about .team-item__body h3 {
  margin: 0 0 8px;
  color: var(--white);
}

.page-about .team-item__body p {
  margin: 0;
  color: var(--steel);
  font-size: 0.94rem;
  line-height: 1.74;
}

/* ---------- 更新节奏 ---------- */
.page-about .practice-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 700px) {
  .page-about .practice-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .practice-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .practice-card {
  position: relative;
  padding: 24px 22px 30px;
  background: var(--ink-700);
  border: var(--about-hair);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.page-about .practice-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--orange), var(--jade));
}

.page-about .practice-card__idx {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  color: var(--orange-soft);
}

.page-about .practice-card__title {
  margin: 0 0 10px;
  color: var(--white);
}

.page-about .practice-card p {
  margin: 0;
  color: var(--steel);
  font-size: 0.93rem;
  line-height: 1.72;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-partners__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
}

@media (min-width: 960px) {
  .page-about .about-partners__layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

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

.page-about .honor-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  align-items: baseline;
  padding: 20px 0;
  border-top: 2px solid var(--ink-600);
}

.page-about .honor-item:last-child {
  border-bottom: 2px solid var(--ink-600);
}

.page-about .honor-item__key {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--jade);
  min-width: 3.4ch;
}

.page-about .honor-item__key--award {
  font-size: 0.98rem;
  color: var(--amber);
}

.page-about .honor-item__body h3 {
  margin: 0 0 6px;
  color: var(--white);
}

.page-about .honor-item__body p {
  margin: 0;
  color: var(--steel);
  font-size: 0.93rem;
  line-height: 1.72;
}

/* ---------- 服务规模 ---------- */
.page-about .reach-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

@media (min-width: 640px) {
  .page-about .reach-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .reach-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .reach-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 26px 22px 24px;
  background: var(--ink-800);
  border: var(--about-hair);
  border-radius: var(--radius-card);
  box-shadow: 4px 4px 0 0 rgba(42, 69, 96, 0.55);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .reach-item:hover {
  border-color: var(--jade-deep);
  transform: translateY(-3px);
}

.page-about .reach-item__num {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5.2vw, 3rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--orange);
}

.page-about .reach-item__unit {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--jade);
}

.page-about .reach-item p {
  margin: 8px 0 0;
  color: var(--steel);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  margin-top: clamp(32px, 5vw, 56px);
  padding: clamp(22px, 4vw, 36px);
  border: var(--about-hair);
  border-radius: var(--radius-card);
  background: var(--ink-700);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 40em;
  color: var(--white);
  line-height: 1.72;
}

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

@media (prefers-reduced-motion: reduce) {
  .page-about .team-item,
  .page-about .reach-item {
    transition: none;
  }
  .page-about .team-item:hover,
  .page-about .reach-item:hover {
    transform: none;
  }
}