/* =========================================================
   page: about (品牌自述)
   ========================================================= */

.page-about {
  --about-rail-w: 148px;
  --about-gap: clamp(26px, 4vw, 64px);
  display: block;
  padding-bottom: clamp(56px, 8vw, 120px);
  overflow-x: clip;
}

/* ---------- 面包屑落位 ---------- */
.page-about > .shell:first-child {
  padding-top: clamp(18px, 2.4vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(34px, 5vw, 76px) clamp(38px, 5.5vw, 84px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -34% -22% -10% -22%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(42% 58% at 8% 14%, rgba(0, 229, 199, 0.17), transparent 66%),
    radial-gradient(38% 52% at 94% 6%, rgba(139, 92, 246, 0.16), transparent 68%),
    radial-gradient(34% 46% at 62% 100%, rgba(255, 107, 74, 0.12), transparent 72%);
}

.page-about .about-hero-eyebrow {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  color: var(--c-cyan);
  letter-spacing: 0.24em;
  font-size: 0.72rem;
  text-transform: uppercase;
}

.page-about .about-hero-title {
  margin: 0 0 clamp(18px, 2.8vw, 30px);
  max-width: 15em;
  font-size: clamp(2.05rem, 7.4vw, 4.9rem);
  font-weight: 250;
  line-height: 1.06;
  letter-spacing: -0.022em;
  color: var(--text);
}

.page-about .about-hero-lead {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(1rem, 1.5vw, 1.16rem);
  line-height: 1.9;
  color: var(--text-soft);
}

.page-about .about-hero-facts {
  list-style: none;
  margin: clamp(30px, 4.4vw, 54px) 0 0;
  padding: clamp(22px, 3vw, 34px) 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 2.8vw, 30px);
}

.page-about .fact-num {
  display: block;
  font-size: clamp(1.55rem, 3.4vw, 2.4rem);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--c-cyan);
}

.page-about .about-hero-facts li:nth-child(2) .fact-num {
  color: var(--c-coral);
}

.page-about .about-hero-facts li:nth-child(3) .fact-num {
  color: var(--c-violet);
}

.page-about .about-hero-facts li:nth-child(4) .fact-num {
  color: var(--c-amber);
}

.page-about .fact-label {
  display: block;
  margin-top: 8px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

/* ---------- 通用分区骨架 ---------- */
.page-about .about-section {
  position: relative;
  padding-block: clamp(44px, 6.5vw, 92px);
}

.page-about .about-section + .about-section {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 26px);
}

.page-about .about-rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-rail-index {
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  font-weight: 400;
  line-height: 1;
  color: var(--c-cyan);
  opacity: 0.62;
}

.page-about .about-rail-label {
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-about .about-title {
  margin: 0 0 clamp(14px, 2.2vw, 24px);
  font-size: clamp(1.55rem, 4vw, 2.7rem);
  font-weight: 280;
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-about .about-subtitle {
  margin: clamp(38px, 5vw, 64px) 0 clamp(12px, 1.8vw, 18px);
  font-size: clamp(1.05rem, 2vw, 1.32rem);
  font-weight: 500;
  color: var(--text);
}

.page-about .about-intro {
  margin: 0 0 clamp(20px, 3vw, 32px);
  max-width: 62ch;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-body a:not(.btn) {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 199, 0.38);
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .about-body a:not(.btn):hover {
  color: var(--c-mist);
  border-bottom-color: var(--c-cyan);
}

/* ---------- 胶囊标签行 ---------- */
.page-about .about-pill-row {
  list-style: none;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-pill-row .tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 16px;
}

/* ---------- 时间轴 ---------- */
.page-about .tl {
  list-style: none;
  position: relative;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0 0 0 34px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(
    180deg,
    var(--c-cyan) 0%,
    var(--c-violet) 56%,
    var(--c-coral) 100%
  );
  opacity: 0.45;
}

.page-about .tl-node {
  position: relative;
  padding-bottom: clamp(22px, 3.2vw, 36px);
}

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

.page-about .tl-node:focus-visible {
  outline: 2px solid var(--c-violet);
  outline-offset: 6px;
  border-radius: var(--r-xs);
}

.page-about .tl-dot {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-ink);
  border: 2px solid var(--c-cyan);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}

.page-about .tl-node:nth-child(2) .tl-dot {
  border-color: var(--c-violet);
}

.page-about .tl-node:nth-child(3) .tl-dot {
  border-color: var(--c-mist);
}

.page-about .tl-node:nth-child(4) .tl-dot {
  border-color: var(--c-coral);
}

.page-about .tl-node:nth-child(5) .tl-dot {
  border-color: var(--c-green);
}

.page-about .tl-node:hover .tl-dot,
.page-about .tl-node:focus-within .tl-dot {
  transform: scale(1.3);
  box-shadow: 0 0 0 9px rgba(0, 229, 199, 0.12);
}

.page-about .tl-node:nth-child(4):hover .tl-dot,
.page-about .tl-node:nth-child(4):focus-within .tl-dot {
  box-shadow: 0 0 0 9px rgba(255, 107, 74, 0.14);
}

.page-about .tl-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 12px;
}

.page-about .tl-year {
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--c-cyan);
}

.page-about .tl-node:nth-child(4) .tl-year {
  color: var(--c-coral);
}

.page-about .tl-node:nth-child(5) .tl-year {
  color: var(--c-green);
}

.page-about .tl-name {
  margin: 0;
  font-size: 1.06rem;
  font-weight: 500;
  color: var(--text);
}

.page-about .tl-text {
  margin: 8px 0 0;
  max-width: 58ch;
  font-size: 0.94rem;
  line-height: 1.82;
  color: var(--text-soft);
}

.page-about .tl-more {
  margin: 0;
  max-width: 58ch;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 图片容器 ---------- */
.page-about .img-frame {
  margin: clamp(26px, 4vw, 46px) 0 0;
  overflow: hidden;
  border-radius: var(--r-md);
}

.page-about .img-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.page-about .about-team-figure {
  aspect-ratio: 4 / 3;
}

.page-about .eco-figure {
  aspect-ratio: 5 / 4;
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 30px);
  align-items: start;
}

.page-about .about-team-copy {
  margin: 0;
}

.page-about .about-team .about-team-figure {
  margin-top: 0;
}

.page-about .about-roles {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(12px, 1.8vw, 18px);
}

.page-about .role-card {
  position: relative;
  padding: clamp(20px, 2.8vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--bg-panel-soft);
  transition: border-color 0.35s var(--ease), background 0.35s var(--ease), transform 0.35s var(--ease);
}

.page-about .role-card:hover {
  border-color: var(--line-cyan);
  background: var(--bg-panel);
  transform: translateY(-4px);
}

.page-about .role-idx {
  display: block;
  margin-bottom: 12px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--c-violet);
}

.page-about .role-name {
  margin: 0 0 8px;
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--text);
}

.page-about .role-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-soft);
}

/* ---------- 服务规模统计 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--line);
}

.page-about .stat-card {
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--bg-panel-soft);
}

.page-about .stat-label {
  margin: 0 0 10px;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-about .stat-value {
  margin: 0;
  font-size: clamp(1.1rem, 2.2vw, 1.5rem);
  font-weight: 500;
  line-height: 1.25;
  color: var(--c-cyan);
}

.page-about .stat-card:nth-child(2) .stat-value {
  color: var(--c-coral);
}

.page-about .stat-card:nth-child(3) .stat-value {
  color: var(--c-violet);
}

.page-about .stat-card:nth-child(4) .stat-value {
  color: var(--c-amber);
}

.page-about .stat-card:nth-child(5) .stat-value {
  color: var(--c-mist);
}

.page-about .stat-card:nth-child(6) .stat-value {
  color: var(--c-green);
}

.page-about .about-coverage-note {
  margin-top: clamp(24px, 3.4vw, 38px);
}

/* ---------- 资质荣誉 ---------- */
.page-about .about-honours {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 22px);
}

.page-about .honour-card {
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(
    150deg,
    rgba(0, 229, 199, 0.08) 0%,
    rgba(13, 43, 69, 0.55) 46%,
    rgba(139, 92, 246, 0.08) 100%
  );
}

.page-about .honour-name {
  margin: 14px 0 10px;
  font-size: clamp(1rem, 1.8vw, 1.18rem);
  font-weight: 500;
  line-height: 1.45;
  color: var(--text);
}

.page-about .honour-text {
  margin: 0;
  max-width: 50ch;
  font-size: 0.92rem;
  line-height: 1.82;
  color: var(--text-soft);
}

/* ---------- 合作生态 ---------- */
.page-about .eco-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(12px, 1.8vw, 20px);
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .eco-node {
  padding: clamp(20px, 2.8vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--bg-panel-soft);
  transition: border-color 0.35s var(--ease), background 0.35s var(--ease), transform 0.35s var(--ease);
}

.page-about .eco-node:hover {
  border-color: var(--line-coral);
  background: var(--bg-panel);
  transform: translateY(-4px);
}

.page-about .eco-name {
  margin: 14px 0 8px;
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--text);
}

.page-about .eco-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-soft);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  margin-top: clamp(40px, 6vw, 80px);
}

.page-about .about-next-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  padding: clamp(28px, 4.2vw, 52px);
  border: 1px solid var(--line-cyan);
  border-radius: var(--r-lg);
  background:
    radial-gradient(70% 120% at 0% 0%, rgba(0, 229, 199, 0.12), transparent 62%),
    radial-gradient(60% 120% at 100% 100%, rgba(255, 107, 74, 0.12), transparent 64%),
    rgba(13, 43, 69, 0.5);
}

.page-about .about-next-title {
  margin: 0 0 10px;
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 300;
  line-height: 1.3;
  color: var(--text);
}

.page-about .about-next-text {
  margin: 0;
  max-width: 52ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-soft);
}

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

/* ---------- 入场动画 ---------- */
@keyframes about-rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-about [data-reveal] {
  animation: about-rise 0.68s var(--ease) both;
}

.page-about .tl-node:nth-child(2) {
  animation-delay: 0.06s;
}

.page-about .tl-node:nth-child(3) {
  animation-delay: 0.12s;
}

.page-about .tl-node:nth-child(4) {
  animation-delay: 0.18s;
}

.page-about .tl-node:nth-child(5) {
  animation-delay: 0.24s;
}

/* ---------- 悬停展开（仅桌面） ---------- */
.page-about .tl-more {
  max-height: none;
  opacity: 1;
  margin-top: 8px;
  overflow: visible;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 860px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
    gap: clamp(24px, 3.4vw, 44px);
  }

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

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

  .page-about .about-next-inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-next-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 960px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, var(--about-rail-w)) minmax(0, 1fr);
    gap: var(--about-gap);
  }

  .page-about .about-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    position: sticky;
    top: calc(var(--bar-h) + 32px);
    align-self: start;
  }

  .page-about .about-rail-index {
    font-size: 1.9rem;
  }

  .page-about .tl-more {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
    overflow: hidden;
    transition: max-height 0.42s var(--ease), opacity 0.42s var(--ease), margin-top 0.42s var(--ease);
  }

  .page-about .tl-node:hover .tl-more,
  .page-about .tl-node:focus-within .tl-more {
    max-height: 200px;
    opacity: 1;
    margin-top: 8px;
  }
}

@media (max-width: 700px) {
  .page-about .about-figure {
    aspect-ratio: 16 / 10;
  }

  .page-about .eco-figure {
    aspect-ratio: 4 / 3;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    animation: none;
  }

  .page-about .role-card:hover,
  .page-about .eco-node:hover {
    transform: none;
  }
}