.page-about {
  --about-rail: 96px;
  background: var(--ink);
  color: var(--body-text);
}

.page-about .about-top {
  padding-top: clamp(14px, 2vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(26px, 4.5vw, 56px) 0 clamp(30px, 5vw, 64px);
  background:
    radial-gradient(120% 90% at 6% 0%, rgba(53, 242, 200, 0.10), transparent 55%),
    radial-gradient(85% 75% at 100% 8%, rgba(91, 200, 255, 0.10), transparent 62%);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
}

.page-about .hero-title {
  margin: 14px 0 18px;
  font-size: clamp(2rem, 6.4vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--paper);
}

.page-about .hero-lead {
  max-width: 46ch;
  color: var(--body-text);
}

.page-about .hero-note {
  margin: 14px 0 0;
  max-width: 44ch;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .hero-status {
  position: relative;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--panel), var(--ink-2));
}

.page-about .hero-status::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 68px;
  background: linear-gradient(var(--mint), transparent);
}

.page-about .status-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--mint);
}

.page-about .status-big {
  margin: 10px 0 18px;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  line-height: 1.1;
  color: var(--paper);
}

.page-about .status-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .status-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
  color: var(--muted);
}

.page-about .status-num {
  font-size: 1.05rem;
  color: var(--mint);
}

/* ---------- 页内目录 ---------- */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-jump a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  font-size: 0.9rem;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-jump a .mono {
  font-size: 0.74rem;
  color: var(--line);
  transition: color 0.2s var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

.page-about .about-jump a:hover .mono,
.page-about .about-jump a:focus-visible .mono {
  color: var(--mint);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapters {
  padding-bottom: clamp(40px, 6vw, 90px);
}

.page-about .about-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding-top: clamp(32px, 5vw, 72px);
  border-top: 1px solid var(--line);
}

.page-about .about-chapter + .about-chapter {
  margin-top: clamp(32px, 5vw, 72px);
}

.page-about .chapter-rail {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .chapter-num {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1;
  color: var(--mint);
  letter-spacing: 0.02em;
}

.page-about .chapter-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-about .chapter-title {
  margin: 0 0 16px;
  font-size: clamp(1.5rem, 3.8vw, 2.6rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .chapter-lead {
  max-width: 62ch;
  color: var(--body-text);
}

.page-about .body-copy {
  max-width: 68ch;
  margin: 18px 0 0;
  line-height: 1.8;
  color: var(--body-text);
}

.page-about .inline-link {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 200, 0.45);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

/* ---------- 01 时间线 ---------- */
.page-about .origin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .tl-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .tl-list::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 3px;
  width: 1px;
  background: linear-gradient(var(--mint), var(--line) 30%, var(--line));
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 clamp(14px, 2vw, 20px) 30px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 0 1px var(--mint);
}

.page-about .tl-card {
  padding: 10px 14px;
  border-left: 1px solid transparent;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .tl-item:hover .tl-card,
.page-about .tl-item:focus-within .tl-card {
  background: var(--ink-2);
  border-left-color: var(--mint);
  transform: translateX(2px);
}

.page-about .tl-year {
  margin: 0 0 4px;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--mint);
}

.page-about .tl-title {
  margin: 0 0 6px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
}

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

/* ---------- 图片框架 ---------- */
.page-about .about-figure {
  position: relative;
  margin: 0;
  padding: 6px;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-about .about-figure::after {
  content: "";
  position: absolute;
  top: 6px;
  right: 6px;
  width: 0;
  height: 0;
  border-top: 22px solid var(--ink);
  border-left: 22px solid transparent;
  pointer-events: none;
}

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

.page-about .about-figure figcaption {
  padding: 10px 6px 4px;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-figure--banner {
  margin-top: clamp(22px, 3vw, 32px);
}

/* ---------- 02 改版对照 ---------- */
.page-about .rev-compare {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .rev-col {
  padding: clamp(16px, 2.4vw, 28px);
  border: 1px solid var(--line);
  background: var(--ink-2);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), opacity 0.25s var(--ease);
}

.page-about .rev-col--old {
  color: var(--muted);
}

.page-about .rev-col--new {
  background: linear-gradient(150deg, rgba(53, 242, 200, 0.08), var(--panel) 62%);
}

.page-about .rev-label {
  margin: 0 0 10px;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-about .rev-num {
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 3.9rem);
  line-height: 1;
  color: var(--muted);
}

.page-about .rev-col--new .rev-num {
  color: var(--mint);
}

.page-about .rev-divider {
  padding: 0 0.12em;
  color: var(--line);
}

.page-about .rev-unit {
  margin: 8px 0 14px;
  font-size: 0.84rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .rev-text {
  margin: 0 0 10px;
  font-size: 0.94rem;
  line-height: 1.75;
}

.page-about .rev-col--old .rev-text {
  color: var(--muted);
}

.page-about .item-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
}

.page-about .item-grid li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  font-size: 0.9rem;
  color: var(--paper);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .item-grid li:hover {
  border-color: var(--mint);
}

.page-about .item-num {
  font-size: 0.7rem;
  color: var(--mint);
}

/* ---------- 03 团队 ---------- */
.page-about .team-bars {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .bar-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.page-about .bar-name {
  font-weight: 600;
  color: var(--paper);
}

.page-about .bar-count {
  font-size: 0.9rem;
  color: var(--mint);
}

.page-about .bar-track {
  height: 10px;
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

.page-about .bar-fill {
  height: 100%;
}

.page-about .bar-fill--data {
  width: 53%;
  background: linear-gradient(90deg, var(--mint), #1fb99a);
}

.page-about .bar-fill--plan {
  width: 26%;
  background: linear-gradient(90deg, var(--sky), #2f7fb5);
}

.page-about .bar-fill--tech {
  width: 21%;
  background: linear-gradient(90deg, var(--amber), #c8811f);
}

.page-about .bar-desc {
  margin: 9px 0 0;
  max-width: 60ch;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 04 流程 ---------- */
.page-about .flow {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .flow-step {
  padding: 14px 14px 16px;
  border-top: 2px solid var(--line);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .flow-step:hover {
  border-top-color: var(--mint);
  background: var(--ink-2);
}

.page-about .flow-num {
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--mint);
}

.page-about .flow-step h3 {
  margin: 6px 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .flow-step p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 05 生态与奖项 ---------- */
.page-about .eco-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .eco-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  font-size: 0.92rem;
  color: var(--paper);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .eco-chip .eco-type {
  padding-left: 10px;
  border-left: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: color 0.22s var(--ease);
}

.page-about .eco-chip:hover {
  border-color: var(--mint);
  transform: translateY(-2px);
}

.page-about .eco-chip:hover .eco-type {
  color: var(--amber);
}

.page-about .award-tile {
  position: relative;
  margin-top: clamp(22px, 3vw, 32px);
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(255, 181, 71, 0.16), transparent 62%),
    var(--ink-2);
}

.page-about .award-tile::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 18px solid var(--ink);
  border-left: 18px solid transparent;
}

.page-about .award-year {
  margin: 0 0 8px;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .award-name {
  margin: 0 0 8px;
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  font-weight: 800;
  color: var(--paper);
}

.page-about .award-desc {
  margin: 0;
  max-width: 52ch;
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 06 服务地区 ---------- */
.page-about .region-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .region-note {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .item-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 700px) {
  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .rev-compare {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  }
}

@media (hover: hover) {
  .page-about .rev-compare:hover .rev-col {
    opacity: 0.5;
  }
  .page-about .rev-compare .rev-col:hover {
    opacity: 1;
    border-color: var(--mint);
  }
}

@media (min-width: 900px) {
  .page-about .about-chapter {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    column-gap: clamp(24px, 4vw, 56px);
  }

  .page-about .chapter-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }
}

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