.page-about {
  --about-rail: 170px;
  position: relative;
  overflow-x: clip;
  background: var(--ink);
  color: var(--fog);
}

.page-about [id] {
  scroll-margin-top: 120px;
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 24px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gray);
}

.page-about .crumbs a {
  color: var(--gray);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .crumbs a:hover {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.page-about .crumbs span[aria-hidden] {
  color: rgba(138, 151, 168, 0.45);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(34px, 5vw, 62px) 0 clamp(54px, 8vw, 100px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -30% 45% 20% -18%;
  background: radial-gradient(circle at 35% 35%, rgba(0, 229, 168, 0.16), transparent 65%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -45%;
  width: 48%;
  height: 95%;
  background: radial-gradient(circle at 60% 40%, rgba(255, 107, 44, 0.13), transparent 66%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 58px);
}

@media (min-width: 980px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-size: clamp(2.1rem, 5.4vw, 4.1rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.022em;
  color: var(--white);
  max-width: 16em;
}

.page-about .about-hero .lede {
  margin: 22px 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.8;
  color: var(--fog);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* 首屏右侧概况 */
.page-about .about-hero__side {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

@media (min-width: 980px) {
  .page-about .about-hero__side {
    padding-top: 0;
    border-top: 0;
    border-left: 1px solid var(--line);
    padding-left: 28px;
  }
}

.page-about .about-hero__side .vertical-note {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gray);
  white-space: nowrap;
}

.page-about .about-facts {
  flex: 1 1 auto;
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-fact:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-fact__value {
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 3.2vw, 2rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--neon);
  white-space: nowrap;
}

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

.page-about .about-fact:nth-child(3) .about-fact__value {
  color: var(--blue);
}

.page-about .about-fact__label {
  font-size: 13px;
  color: var(--gray);
}

/* ---------- 章节通用骨架 ---------- */
.page-about .about-stage {
  position: relative;
  padding: clamp(50px, 7vw, 90px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-stage:last-of-type {
  border-bottom: 0;
}

.page-about .about-stage__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 40px);
}

@media (min-width: 900px) {
  .page-about .about-stage__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(30px, 4.5vw, 62px);
  }
}

.page-about .about-stage__rail {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-left: 22px;
}

@media (min-width: 900px) {
  .page-about .about-stage__rail {
    flex-direction: column;
    gap: 20px;
    padding-top: 4px;
  }
}

.page-about .about-stage__rail::before,
.page-about .about-stage__rail::after {
  display: none;
}

@media (min-width: 900px) {
  .page-about .about-stage__rail::before {
    display: block;
    content: "";
    position: absolute;
    left: 5px;
    top: 10px;
    bottom: -4px;
    width: 1px;
    background: linear-gradient(180deg, var(--neon), rgba(0, 229, 168, 0.06) 76%, transparent);
  }

  .page-about .about-stage__rail::after {
    display: block;
    content: "";
    position: absolute;
    left: 0;
    top: 7px;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--ink);
    border: 2px solid var(--neon);
    box-shadow: 0 0 0 4px rgba(0, 229, 168, 0.12);
  }
}

.page-about .about-stage__num {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 6.5vw, 3.5rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(0, 229, 168, 0.6);
}

.page-about .about-stage__rail .vertical-note {
  writing-mode: horizontal-tb;
  transform: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gray);
  white-space: nowrap;
}

@media (min-width: 900px) {
  .page-about .about-stage__rail .vertical-note {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    max-height: 180px;
    white-space: nowrap;
  }
}

.page-about .about-stage__body {
  min-width: 0;
}

.page-about .about-stage__title {
  margin: 10px 0 0;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.016em;
  color: var(--white);
  max-width: 20em;
}

.page-about .about-stage__body > .lede {
  margin: 16px 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.8;
  color: var(--fog);
}

.page-about .about-stage__body .prose {
  margin-top: 18px;
}

.page-about .about-stage__body .prose p {
  margin: 0 0 1em;
  line-height: 1.8;
}

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

/* ---------- 01 起点小数据条 ---------- */
.page-about .about-mini {
  display: grid;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 640px) {
  .page-about .about-mini {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 16px;
  }
}

.page-about .about-mini li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel);
  font-size: 14px;
  color: var(--fog);
}

.page-about .about-mini .mono {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 600;
  color: var(--neon);
  line-height: 1;
}

/* ---------- 02 时间线 ---------- */
.page-about .about-timeline__media {
  margin: 28px 0 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

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

.page-about .about-timeline .acc__item {
  border-bottom: 1px solid var(--line);
}

.page-about .about-timeline .acc__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 18px 6px;
  background: transparent;
  border: 0;
  border-radius: var(--radius-sm);
  text-align: left;
  cursor: pointer;
  color: inherit;
  font: inherit;
  transition: background var(--t-fast) var(--ease);
}

.page-about .about-timeline .acc__trigger:hover {
  background: rgba(0, 229, 168, 0.05);
}

.page-about .about-timeline .acc__trigger:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-about .about-node__ver {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid rgba(0, 229, 168, 0.38);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--neon);
  white-space: nowrap;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease);
}

.page-about .about-node__text {
  display: block;
  min-width: 0;
}

.page-about .about-node__name {
  display: block;
  font-size: clamp(1rem, 2vw, 1.12rem);
  font-weight: 700;
  color: var(--white);
  transition: color var(--t-fast) var(--ease);
}

.page-about .about-timeline .acc__trigger:hover .about-node__name {
  color: var(--neon);
}

.page-about .about-node__hint {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray);
}

.page-about .about-timeline .acc__trigger[aria-expanded="true"] .about-node__ver {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--ink);
}

.page-about .about-timeline .acc__inner {
  padding: 0 6px 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog);
}

.page-about .about-timeline .acc__inner p {
  margin: 0;
}

@media (min-width: 640px) {
  .page-about .about-timeline .acc__inner {
    padding-left: 112px;
    padding-right: 48px;
  }
}

/* ---------- 03 版本对照标签页 ---------- */
.page-about .about-compare {
  margin-top: 28px;
}

.page-about .about-compare .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-compare .tabs__tab {
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  background: transparent;
  color: var(--gray);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease);
}

.page-about .about-compare .tabs__tab:hover {
  color: var(--white);
  border-color: var(--line-strong);
}

.page-about .about-compare .tabs__tab:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-about .about-compare .tabs__tab[aria-selected="true"] {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--ink);
}

.page-about .about-compare .tabs__panel {
  padding: 26px 0 0;
}

.page-about .about-compare-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

@media (min-width: 760px) {
  .page-about .about-compare-list {
    gap: 16px;
  }
}

.page-about .about-compare-list li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--fog);
}

.page-about .about-compare-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  width: 8px;
  height: 8px;
  border: 1px solid var(--neon);
  transform: rotate(45deg);
}

.page-about .tabs__panel[data-panel="v1"] .about-compare-list li::before {
  border-color: var(--blue);
}

/* ---------- 04 变更说明 ---------- */
.page-about .about-changelog__media {
  margin: 28px 0 0;
  aspect-ratio: 10 / 7;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

.page-about .about-links {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

@media (min-width: 720px) {
  .page-about .about-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

.page-about .about-link {
  display: block;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  text-decoration: none;
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
    box-shadow var(--t-fast) var(--ease);
}

.page-about .about-link:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 229, 168, 0.5);
  box-shadow: var(--shadow-1);
}

.page-about .about-link:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-about .about-link__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--neon);
}

.page-about .about-link__v {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--fog);
}

/* ---------- 05 五项能力 ---------- */
.page-about .about-cap {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-cap__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 22px 8px;
  border-bottom: 1px solid var(--line);
  transition: background var(--t-fast) var(--ease);
}

.page-about .about-cap__item:hover {
  background: rgba(77, 141, 255, 0.06);
}

@media (min-width: 760px) {
  .page-about .about-cap__item {
    grid-template-columns: 58px minmax(150px, 210px) minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
    padding: 24px 12px;
  }
}

.page-about .about-cap__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--neon);
}

.page-about .about-cap__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
}

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

/* ---------- 06 团队与运营 ---------- */
.page-about .about-team {
  display: grid;
  gap: 26px;
  margin-top: 28px;
}

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }
}

.page-about .about-team__media {
  margin: 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

.page-about .about-team__stats {
  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-stat {
  padding: 18px 16px;
  background: var(--panel);
}

.page-about .about-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 2.8vw, 1.85rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-stat:nth-child(1) .about-stat__value,
.page-about .about-stat:nth-child(2) .about-stat__value {
  color: var(--neon);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 9px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--gray);
}

.page-about .about-partners {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

@media (min-width: 640px) {
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 20px;
  }
}

.page-about .about-partners li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 14px;
  color: var(--fog);
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-partners .mono {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--orange);
  line-height: 1;
}

/* ---------- 07 直营理由 ---------- */
.page-about .about-reasons {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 30px;
}

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

.page-about .about-reason {
  padding: 22px 22px 24px;
}

.page-about .about-reason__title {
  margin: 14px 0 0;
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
}

.page-about .about-reason p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--fog);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(56px, 8vw, 96px) 0 clamp(64px, 9vw, 108px);
  border-top: 1px solid var(--line);
  background:
    linear-gradient(122deg, rgba(0, 229, 168, 0.09), transparent 44%),
    linear-gradient(300deg, rgba(255, 107, 44, 0.09), transparent 48%),
    var(--panel);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 28px;
}

@media (min-width: 880px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: center;
    gap: 52px;
  }
}

.page-about .about-cta__title {
  margin: 12px 0 0;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--white);
  max-width: 18em;
}

.page-about .about-cta__text {
  margin: 16px 0 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog);
}

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

@media (min-width: 880px) {
  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

/* ---------- 图片通用 ---------- */
.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- 动效约束 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
}

.page-about [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .about-link:hover,
  .page-about .panel--hover:hover {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>