.page-about {
  --about-rail: 216px;
  position: relative;
  isolation: isolate;
  overflow-x: hidden;
}

/* ---------- 顶部路径条 ---------- */
.page-about .about-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-topbar__mark {
  margin: 0;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--text-3);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 48px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -34%;
  right: -18%;
  width: 88%;
  height: 156%;
  background-image:
    linear-gradient(rgba(140, 154, 147, .1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(140, 154, 147, .1) 1px, transparent 1px),
    linear-gradient(150deg, rgba(23, 58, 44, .94) 0%, rgba(10, 35, 27, .55) 48%, rgba(5, 20, 15, 0) 100%);
  background-size: 32px 32px, 32px 32px, 100% 100%;
  clip-path: polygon(24% 0, 100% 5%, 100% 95%, 0 100%);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

.page-about .about-hero__copy h1 {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(34px, 6.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--paper);
  max-width: 18ch;
}

.page-about .about-hero__copy .lede {
  max-width: 46ch;
  color: var(--text-2);
}

.page-about .about-hero__points {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 46ch;
}

.page-about .about-hero__points li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--text-2);
}

.page-about .about-hero__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 9px;
  height: 9px;
  background: var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% 60%, 60% 100%, 0 100%);
}

.page-about .about-hero__more {
  margin: 22px 0 0;
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
  padding-bottom: 2px;
  font-size: 15px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

/* 首屏右侧计分板 */
.page-about .about-hero__plate {
  position: relative;
  padding: 22px 22px 24px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(10, 35, 27, .95), rgba(5, 20, 15, .82));
  box-shadow: var(--shadow-cyan);
}

.page-about .about-plate__label {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--text-3);
}

.page-about .about-plate__big {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(56px, 12vw, 72px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-plate__cap {
  margin: 6px 0 16px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-2);
}

.page-about .about-plate__list {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  gap: 10px;
}

.page-about .about-plate__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  color: var(--text-2);
}

.page-about .about-plate__n {
  font-family: var(--font-num);
  font-weight: 700;
  color: var(--ice);
  font-size: 18px;
  min-width: 58px;
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  padding-bottom: 72px;
}

/* 章节索引 */
.page-about .about-index {
  border-top: 1px solid var(--line-soft);
  padding-top: 12px;
}

.page-about .about-index__label {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--text-3);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

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

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 13px;
  white-space: nowrap;
  font-size: var(--fs-sm);
  color: var(--text-2);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-index__n {
  font-family: var(--font-num);
  font-size: 11px;
  color: var(--clay);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--paper);
  border-color: var(--line-cyan);
  background: rgba(79, 240, 200, .08);
}

/* 章节节点 */
.page-about .about-node {
  padding-top: 34px;
  scroll-margin-top: 92px;
}

.page-about .about-node__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.page-about .about-node__idx {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--clay);
}

.page-about .about-node__rule {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line-cyan), rgba(79, 240, 200, 0) 82%);
}

.page-about .about-node__title {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: clamp(23px, 3.6vw, 32px);
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .about-node__body p {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--text-2);
}

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

/* 图片 */
.page-about .about-figure {
  position: relative;
  margin: 24px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

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

.page-about .about-figure__cap {
  display: block;
  padding: 10px 14px;
  font-size: var(--fs-sm);
  line-height: 1.5;
  color: var(--text-3);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 服务原则 ---------- */
.page-about .about-rules {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.page-about .about-rule {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(10, 35, 27, .78), rgba(5, 20, 15, .48));
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-rule:hover {
  border-color: var(--line-cyan);
  transform: translateY(-3px);
}

.page-about .about-rule__no {
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--ice);
}

.page-about .about-rule h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-rule p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-2);
}

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

.page-about .about-rule__cost {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--line-amber);
}

.page-about .about-cost {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .about-cost .price {
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-cost .price__unit {
  font-size: 12px;
  color: var(--text-3);
}

/* ---------- 版本演进 ---------- */
.page-about .about-branch {
  display: block;
  width: 100%;
  height: auto;
  margin: 10px 0 4px;
}

.page-about .about-branch__line {
  stroke: var(--line);
  stroke-width: 1;
}

.page-about .about-branch__node circle {
  fill: var(--ink-900);
  stroke: var(--cyan);
  stroke-width: 2;
}

.page-about .about-branch__node text {
  fill: var(--text-3);
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
}

.page-about .about-branch__node:last-child circle {
  stroke: var(--amber);
}

.page-about .about-branch__node:last-child text {
  fill: var(--amber);
}

.page-about .about-vers {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
}

.page-about .about-ver {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-ver:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-ver__tag {
  font-family: var(--font-num);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--cyan);
}

.page-about .about-ver:last-child .about-ver__tag {
  color: var(--amber);
}

.page-about .about-ver__text h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-ver__text p {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-2);
}

/* ---------- 全宽交错色带 ---------- */
.page-about .about-band {
  position: relative;
  margin: 40px 0 4px;
  padding: 28px 22px 30px;
  background:
    linear-gradient(104deg, rgba(23, 58, 44, .96) 0%, rgba(201, 111, 74, .2) 62%, rgba(5, 20, 15, .1) 100%);
  clip-path: polygon(0 10%, 100% 0, 100% 90%, 0 100%);
}

.page-about .about-band__seq {
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-about .about-band__text {
  margin: 0;
  max-width: 40em;
  font-family: var(--font-serif);
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.6;
  color: var(--paper);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-team__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 16px;
  background: var(--ink-800);
}

.page-about .about-team__num {
  font-family: var(--font-num);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-team__label {
  font-size: 14px;
  color: var(--paper);
}

.page-about .about-team__desc {
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-3);
}

.page-about .about-coverage {
  margin-top: 22px;
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--ice);
  border-radius: var(--radius);
  background: rgba(10, 35, 27, .55);
}

.page-about .about-coverage p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-2);
}

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

.page-about .about-coverage__n {
  font-family: var(--font-num);
  font-weight: 700;
  color: var(--ice);
}

/* ---------- 数据复核 ---------- */
.page-about .about-verify {
  margin-top: 22px;
  padding: 22px 20px 24px;
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(10, 35, 27, .92), rgba(5, 20, 15, .6));
}

.page-about .about-verify__num {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(46px, 11vw, 68px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-verify__unit {
  font-size: .42em;
  margin-left: 4px;
  color: var(--text-3);
}

.page-about .about-verify__cap {
  margin: 8px 0 18px;
  font-size: 14px;
  color: var(--text-2);
}

.page-about .about-verify__list {
  list-style: none;
  margin: 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  gap: 10px;
}

.page-about .about-verify__list li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-2);
}

.page-about .about-verify__list .tnum {
  font-family: var(--font-num);
  font-weight: 700;
  color: var(--amber);
  margin-right: 4px;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 16px;
}

.page-about .about-partners__text p {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--text-2);
}

.page-about .about-partners__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

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

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

  .page-about .about-ver {
    grid-template-columns: 78px minmax(0, 1fr);
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-about .about-rules {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-partners {
    grid-template-columns: minmax(0, 1fr) 290px;
    gap: 34px;
    align-items: start;
  }

  .page-about .about-figure--sq {
    margin-top: 46px;
  }

  .page-about .about-hero {
    padding: 64px 0 72px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 316px;
    gap: 52px;
  }

  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 52px;
    padding-bottom: 96px;
  }

  .page-about .about-index {
    position: sticky;
    top: 88px;
    align-self: start;
    border-top: 0;
    padding-top: 0;
  }

  .page-about .about-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__list li + li {
    margin-top: 2px;
  }

  .page-about .about-index__link {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: 8px 0 8px 12px;
    white-space: normal;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, rgba(79, 240, 200, .14), rgba(79, 240, 200, 0) 72%);
  }

  .page-about .about-node {
    padding-top: 46px;
  }

  .page-about .about-band {
    padding: 34px 30px 36px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-node__body p,
  .page-about .about-partners__text p {
    font-size: 16.5px;
  }
}
<<<END>>>