.page-about {
  --ab-rail-w: 168px;
  --ab-col-gap: clamp(24px, 4.5vw, 60px);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: 26px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(20px, 4vw, 46px);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  align-items: center;
}

@media (min-width: 920px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.14fr) minmax(0, 0.86fr);
    gap: clamp(30px, 5vw, 72px);
  }
}

.page-about .about-h1 {
  margin: 14px 0 0;
  font-size: clamp(38px, 6.2vw, 74px);
  line-height: 1.03;
  letter-spacing: -0.025em;
  font-weight: 900;
  color: var(--ice);
}

.page-about .about-h1-em {
  color: var(--lime);
  display: inline-block;
}

.page-about .about-lede {
  margin: 22px 0 0;
  max-width: 44ch;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

.page-about .about-hero-facts {
  list-style: none;
  margin: 30px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
}

.page-about .about-fact {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

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

.page-about .about-fact:nth-child(2)::before {
  background: var(--orange);
}

.page-about .about-hero-visual {
  padding: 20px 20px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(158deg, var(--panel-2), var(--panel) 62%, var(--bg));
  box-shadow: var(--shadow);
}

.page-about .about-visual-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .about-visual-badge {
  font-size: 15px;
  font-weight: 600;
  color: var(--lime);
  letter-spacing: -0.01em;
}

.page-about .about-spark {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-visual-foot {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 索引 + 内容流 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
  padding-top: clamp(46px, 7vw, 88px);
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    gap: var(--ab-col-gap);
  }
}

.page-about .about-rail-label {
  display: none;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
  text-transform: uppercase;
}

@media (min-width: 1000px) {
  .page-about .about-rail {
    position: sticky;
    top: 116px;
  }
  .page-about .about-rail-label {
    display: block;
  }
}

.page-about .about-rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail-list::-webkit-scrollbar {
  display: none;
}

@media (min-width: 1000px) {
  .page-about .about-rail-list {
    display: block;
    padding: 0;
    overflow: visible;
    border-left: 1px solid var(--line);
  }
}

.page-about .about-rail-link {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: var(--panel);
  color: var(--mist);
  font-size: 13px;
  text-decoration: none;
  transition: color 0.3s var(--ease), background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .about-rail-link:hover {
  color: var(--ice);
  border-color: var(--orange);
}

.page-about .about-rail-link .num {
  font-size: 11px;
  opacity: 0.85;
  letter-spacing: 0.06em;
}

.page-about .about-rail-link[aria-current] {
  color: var(--ice);
  background: rgba(76, 243, 155, 0.08);
  border-color: var(--lime);
}

.page-about .about-rail-link[aria-current] .num {
  color: var(--lime);
  opacity: 1;
}

@media (min-width: 1000px) {
  .page-about .about-rail-link {
    display: block;
    margin-left: -1px;
    padding: 10px 10px 10px 15px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: none;
    white-space: normal;
  }
  .page-about .about-rail-link .num {
    display: inline-block;
    margin-right: 8px;
  }
  .page-about .about-rail-link:hover {
    border-color: transparent;
    border-left-color: var(--orange);
  }
  .page-about .about-rail-link[aria-current] {
    background: linear-gradient(90deg, rgba(76, 243, 155, 0.13), transparent 88%);
    border-color: transparent;
    border-left-color: var(--lime);
  }
}

.page-about .about-flow {
  display: grid;
  gap: clamp(52px, 7.5vw, 100px);
  min-width: 0;
}

.page-about .about-sec {
  scroll-margin-top: 112px;
  min-width: 0;
}

.page-about .about-sec-head {
  margin-bottom: 18px;
}

.page-about .about-sec-title {
  margin: 10px 0 0;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--ice);
  text-wrap: balance;
}

.page-about .about-sec-lede {
  margin: 0 0 24px;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 服务对象 ---------- */
.page-about .about-who-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-who-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 18px;
  padding: 22px clamp(18px, 3vw, 30px);
  background: var(--panel);
  transition: background 0.35s var(--ease);
}

.page-about .about-who-item:hover {
  background: var(--panel-2);
}

.page-about .about-who-num {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--lime);
  padding-top: 5px;
}

.page-about .about-who-name {
  margin: 0;
  font-size: clamp(17px, 2vw, 19px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-about .about-who-text {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

@media (min-width: 900px) {
  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    gap: clamp(28px, 4vw, 52px);
    align-items: start;
  }
}

.page-about .about-team-copy {
  min-width: 0;
}

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

.page-about .about-bar-wrap {
  margin: 24px 0 0;
}

.page-about .about-bar {
  position: relative;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: var(--panel-2);
  overflow: hidden;
}

.page-about .about-bar-fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 32.1%;
  border-radius: var(--pill);
  background: linear-gradient(90deg, var(--lime-deep), var(--lime));
  box-shadow: 0 0 24px rgba(76, 243, 155, 0.35);
}

.page-about .about-bar-legend {
  margin: 12px 0 0;
  font-size: 13px;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.page-about .about-bar-legend .num {
  color: var(--ice);
}

.page-about .about-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), background 0.35s var(--ease);
}

.page-about .about-step:hover {
  transform: translateY(-3px);
  border-color: var(--lime);
  background: var(--panel-2);
}

.page-about .about-step-num {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
  padding-top: 4px;
}

.page-about .about-step-name {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 800;
  color: var(--ice);
}

.page-about .about-step-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--panel);
}

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

.page-about .about-figure figcaption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-band {
  margin: 0 0 26px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(150deg, var(--panel-2), var(--bg));
}

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

.page-about .about-band--bottom {
  margin: 30px 0 0;
}

/* ---------- 三件工具 ---------- */
.page-about .about-tools {
  display: grid;
  gap: 16px;
}

@media (min-width: 900px) {
  .page-about .about-tools {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .about-tool--a {
    grid-column: 1 / span 7;
  }
  .page-about .about-tool--b {
    grid-column: 8 / span 5;
  }
  .page-about .about-tool--c {
    grid-column: 2 / span 11;
  }
}

.page-about .about-tool {
  min-width: 0;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  background: var(--panel);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}

.page-about .about-tool:hover {
  transform: translateY(-3px);
  border-color: var(--lime);
}

.page-about .about-tool--a {
  border-radius: var(--r-lg);
  background: linear-gradient(165deg, var(--panel-2), var(--panel) 70%);
}

.page-about .about-tool--b {
  border-radius: var(--r-sm);
}

.page-about .about-tool--c {
  border-radius: 34px 14px 34px 14px;
  background: linear-gradient(160deg, rgba(76, 243, 155, 0.09), var(--panel) 58%);
}

.page-about .about-tool-tag {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-tool-title {
  margin: 0 0 10px;
  font-size: clamp(20px, 2.4vw, 27px);
  font-weight: 900;
  letter-spacing: -0.015em;
  color: var(--ice);
}

.page-about .about-tool-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-tool-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-tool-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ice);
  opacity: 0.86;
}

.page-about .about-tool-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 2px;
  border-radius: 2px;
  background: var(--lime);
}

.page-about .about-tool-details {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-about .about-tool-details summary {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-about .about-tool-details summary::-webkit-details-marker {
  display: none;
}

.page-about .about-tool-details summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--orange);
  width: 12px;
}

.page-about .about-tool-details[open] summary::before {
  content: "−";
}

.page-about .about-tool-details p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ice);
  opacity: 0.82;
}

/* ---------- 版本演进 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-phase {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
}

.page-about .about-phase-num {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .about-phase-title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-about .about-phase-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
    padding-top: 34px;
    position: relative;
  }
  .page-about .about-timeline::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 10px;
    height: 1px;
    background: linear-gradient(90deg, var(--lime) 0%, var(--line) 42%, var(--line) 100%);
  }
  .page-about .about-phase {
    position: relative;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: none;
  }
  .page-about .about-phase::before {
    content: "";
    position: absolute;
    top: -29px;
    left: 0;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--bg);
    border: 2px solid var(--lime);
  }
  .page-about .about-phase:last-child::before {
    border-color: var(--orange);
  }
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 20px;
}

@media (min-width: 760px) {
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }
}

.page-about .about-partner {
  padding: clamp(24px, 3.4vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--panel-2), var(--panel) 72%);
}

.page-about .about-partner--alt {
  border-radius: var(--r-lg) var(--r-md) var(--r-lg) var(--r-md);
  background: var(--panel);
}

.page-about .about-partner-num {
  display: block;
  font-size: clamp(46px, 6vw, 66px);
  line-height: 1;
  font-weight: 600;
  letter-spacing: -0.04em;
  color: var(--lime);
}

.page-about .about-partner--alt .about-partner-num {
  color: var(--orange);
}

.page-about .about-partner-name {
  margin: 16px 0 10px;
  font-size: clamp(18px, 2.2vw, 21px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-about .about-partner-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-partner-note {
  margin: 26px 0 0;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-partner-note .num {
  color: var(--ice);
}

/* ---------- 本地服务 ---------- */
.page-about .about-local-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-local-list li {
  display: grid;
  gap: 6px;
  padding: 18px clamp(18px, 3vw, 26px);
  background: var(--panel);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ice);
  opacity: 0.9;
}

@media (min-width: 700px) {
  .page-about .about-local-list li {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

.page-about .about-local-key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--lime);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta {
  margin-top: clamp(52px, 8vw, 110px);
  padding-block: clamp(42px, 6vw, 76px);
  border-top: 1px solid var(--line);
  background: radial-gradient(120% 170% at 12% 0%, rgba(76, 243, 155, 0.11), transparent 62%), var(--bg);
}

.page-about .about-cta-inner {
  display: grid;
  gap: 26px;
}

@media (min-width: 880px) {
  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 44px;
  }
}

.page-about .about-cta-title {
  margin: 0 0 12px;
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--ice);
}

.page-about .about-cta-text {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
<<<END>>>