.page-about {
  --ab-pad-y: clamp(56px, 8vw, 104px);
  --ab-gap: clamp(28px, 4.4vw, 56px);
  background: var(--ink);
  color: var(--bone);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--top-h) + clamp(40px, 7vw, 76px)) 0 clamp(44px, 6vw, 76px);
  background:
    radial-gradient(92% 72% at 6% 0%, rgba(201, 255, 74, 0.10), transparent 60%),
    linear-gradient(158deg, #0D2B21 0%, #081C15 64%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(34px, 5vw, 64px);
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--lime);
}

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

.page-about .about-h1 {
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 6.2vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.page-about .about-h1 em {
  font-style: normal;
  color: var(--lime);
}

.page-about .about-lede {
  margin: 0;
  max-width: 40em;
  font-size: clamp(0.98rem, 1.12vw, 1.08rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero-stats {
  list-style: none;
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-hero-stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  background: rgba(17, 23, 20, 0.74);
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.3rem, 2.4vw, 1.75rem);
  font-weight: 600;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .about-stat-label {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--stone);
}

.page-about .about-hero-media {
  position: relative;
  margin: 0;
}

.page-about .about-hero-media .media-frame {
  aspect-ratio: 3 / 4;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  overflow: hidden;
}

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

.page-about .about-media-note {
  position: absolute;
  right: 10px;
  bottom: 12px;
  padding: 14px 8px;
  border-radius: 999px;
  background: rgba(17, 23, 20, 0.92);
  border: 1px solid var(--line-strong);
}

.page-about .about-rot {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.3em;
  color: var(--stone);
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  max-width: var(--shell);
  margin: 0 auto;
  padding: var(--ab-pad-y) var(--gutter);
}

.page-about .about-band {
  padding: var(--ab-pad-y) 0;
}

.page-about .about-band-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ab-gap);
}

.page-about .about-num {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.26em;
  color: var(--lime);
}

.page-about .about-h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 3.2vw, 2.45rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--bone);
}

.page-about .about-lead {
  margin: 0;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-copy p {
  margin: 0 0 1em;
  font-size: 1rem;
  line-height: 1.88;
  color: var(--mist);
}

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

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

.page-about .about-figure .media-frame {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  overflow: hidden;
}

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

.page-about .about-figure-caption {
  margin-top: 12px;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--stone);
}

/* ---------- 01 品牌起点 ---------- */
.page-about .about-block-aside {
  position: relative;
  padding-left: 18px;
  border-left: 2px solid rgba(185, 106, 76, 0.55);
}

/* ---------- 02 团队构成 ---------- */
.page-about .about-team {
  background: linear-gradient(180deg, rgba(47, 74, 59, 0.42) 0%, rgba(8, 28, 21, 0) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.page-about .team-switch {
  position: relative;
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .team-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .team-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .team-tabs label {
  display: inline-block;
  padding: 10px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--mist);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .team-tabs label:hover {
  border-color: var(--lime);
  color: var(--bone);
}

.page-about #team-editor:checked ~ .team-tabs label[for="team-editor"],
.page-about #team-data:checked ~ .team-tabs label[for="team-data"],
.page-about #team-product:checked ~ .team-tabs label[for="team-product"],
.page-about #team-support:checked ~ .team-tabs label[for="team-support"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--carbon);
}

.page-about #team-editor:focus-visible ~ .team-tabs label[for="team-editor"],
.page-about #team-data:focus-visible ~ .team-tabs label[for="team-data"],
.page-about #team-product:focus-visible ~ .team-tabs label[for="team-product"],
.page-about #team-support:focus-visible ~ .team-tabs label[for="team-support"] {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-about .team-panels {
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-about .team-panel {
  display: none;
  padding: clamp(22px, 3.2vw, 34px);
  background: var(--slate);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  border-left: 3px solid var(--lime);
}

.page-about #team-editor:checked ~ .team-panels .team-panel[data-panel="editor"],
.page-about #team-data:checked ~ .team-panels .team-panel[data-panel="data"],
.page-about #team-product:checked ~ .team-panels .team-panel[data-panel="product"],
.page-about #team-support:checked ~ .team-panels .team-panel[data-panel="support"] {
  display: block;
}

.page-about .team-panel-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1.9vw, 1.35rem);
  font-weight: 700;
  color: var(--bone);
}

.page-about .team-panel p {
  margin: 0 0 16px;
  font-size: 0.98rem;
  line-height: 1.86;
  color: var(--mist);
  max-width: 42em;
}

.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .team-list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--bone);
}

.page-about .team-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--orange);
}

/* ---------- 03 里程碑 ---------- */
.page-about .about-milestone {
  background: linear-gradient(180deg, rgba(26, 43, 39, 0.9) 0%, rgba(8, 28, 21, 0) 100%);
}

.page-about .about-milestone-copy .about-lead {
  margin-bottom: clamp(24px, 3.4vw, 38px);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(16px, 2.2vw, 24px);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--lime) 100%);
  opacity: 0.55;
}

.page-about .about-tl-item {
  position: relative;
  padding-left: 32px;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--orange);
}

.page-about .about-tl-item.is-content::before {
  border-color: var(--lime);
}

.page-about .about-tl-year {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--bone);
  line-height: 1.2;
}

.page-about .about-tl-title {
  margin: 4px 0 6px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--bone);
}

.page-about .about-tl-text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-tl-more {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 260ms var(--ease), opacity 200ms var(--ease);
}

.page-about .about-tl-more p {
  margin: 10px 0 0;
  padding-left: 12px;
  border-left: 2px solid rgba(201, 255, 74, 0.4);
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-tl-item:hover .about-tl-more,
.page-about .about-tl-item:focus-within .about-tl-more {
  max-height: 240px;
  opacity: 1;
}

.page-about .about-milestone-figure {
  order: -1;
}

/* ---------- 04 内容组织 ---------- */
.page-about .about-method-list {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-method-list li {
  position: relative;
  padding: 16px 18px 16px 52px;
  background: rgba(26, 43, 39, 0.62);
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.page-about .about-method-num {
  position: absolute;
  left: 16px;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .about-method-list h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--bone);
}

.page-about .about-method-list p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.76;
  color: var(--mist);
}

/* ---------- 05 服务规模 ---------- */
.page-about .about-scale {
  background:
    linear-gradient(180deg, rgba(47, 74, 59, 0.30) 0%, rgba(8, 28, 21, 0) 100%);
  border-top: 1px solid var(--line);
}

.page-about .about-scale-head {
  max-width: 46em;
  margin-bottom: clamp(26px, 3.6vw, 40px);
}

.page-about .about-scale-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-scale-grid li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 2.4vw, 26px);
  background: var(--carbon);
}

.page-about .about-scale-grid li.is-signal {
  background: var(--lime);
}

.page-about .about-scale-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.25rem, 2.6vw, 1.9rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.page-about .about-scale-grid li.is-signal .about-scale-num {
  color: var(--carbon);
}

.page-about .about-scale-label {
  font-size: 0.8rem;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--stone);
}

.page-about .about-scale-grid li.is-signal .about-scale-label {
  color: rgba(17, 23, 20, 0.72);
}

.page-about .about-scale-note {
  margin: clamp(22px, 3vw, 30px) 0 0;
  max-width: 44em;
  font-size: 0.94rem;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-scale-note a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 255, 74, 0.42);
  padding-bottom: 1px;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-scale-note a:hover {
  color: var(--bone);
  border-bottom-color: var(--bone);
}

/* ---------- 06 合作生态 ---------- */
.page-about .about-partner-head {
  max-width: 46em;
  margin-bottom: clamp(26px, 3.6vw, 40px);
}

.page-about .about-partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-partner-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 20px 0 20px 0;
  border-bottom: 1px solid var(--line);
  transition: background var(--dur) var(--ease);
}

.page-about .about-partner-index {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  color: var(--clay);
}

.page-about .about-partner-list h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.9vw, 1.3rem);
  font-weight: 700;
  color: var(--bone);
}

.page-about .about-partner-list p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.76;
  color: var(--mist);
}

.page-about .about-partner-cta {
  margin-top: clamp(24px, 3.4vw, 34px);
  display: inline-block;
}

/* ---------- 07 使用场景 ---------- */
.page-about .about-scenes {
  background: linear-gradient(180deg, rgba(26, 43, 39, 0.55) 0%, rgba(8, 28, 21, 0) 100%);
}

.page-about .about-scenes-head {
  max-width: 46em;
  margin-bottom: clamp(26px, 3.6vw, 42px);
}

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

.page-about .about-scene {
  padding: clamp(20px, 3vw, 30px);
  background: var(--slate);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-scene:hover {
  transform: translateY(-3px);
  border-color: rgba(201, 255, 74, 0.5);
}

.page-about .about-scene h3 {
  margin: 14px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.9vw, 1.3rem);
  font-weight: 700;
  color: var(--bone);
}

.page-about .about-scene p {
  margin: 0 0 16px;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-scene-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 255, 74, 0.45);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-scene-link:hover {
  color: var(--bone);
  border-bottom-color: var(--bone);
}

.page-about .about-scene-link:focus-visible,
.page-about .about-scale-note a:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 4px;
  border-radius: 2px;
}

/* ---------- 收尾 ---------- */
.page-about .about-closing {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(80% 120% at 90% 0%, rgba(255, 138, 61, 0.12), transparent 62%),
    var(--carbon);
}

.page-about .about-closing-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(44px, 6vw, 78px) var(--gutter);
  display: grid;
  gap: clamp(22px, 3vw, 32px);
}

.page-about .about-closing-text {
  margin: 0;
  max-width: 28em;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.4vw, 1.7rem);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--bone);
}

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

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

@media (min-width: 860px) {
  .page-about .about-partner-list li {
    grid-template-columns: 64px minmax(0, 14em) minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
    padding: 24px 0;
  }

  .page-about .about-partner-index {
    align-self: center;
  }

  .page-about .about-scene-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .about-closing-inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.78fr);
    align-items: start;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 4.5fr) minmax(0, 7.5fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-split--media {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-milestone-figure {
    order: 0;
  }

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

  .page-about .about-scene-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    padding-bottom: 34px;
  }

  .page-about .about-scene-grid > .about-scene:nth-child(2) {
    transform: translateY(30px);
  }

  .page-about .about-scene-grid > .about-scene:nth-child(2):hover {
    transform: translateY(27px);
  }
}

@media (hover: none) {
  .page-about .about-tl-more {
    max-height: 240px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-scene,
  .page-about .about-scene-grid > .about-scene:nth-child(2),
  .page-about .about-tl-more,
  .page-about .team-tabs label {
    transition: none;
    transform: none;
  }
}