.page-about {
  --about-gap: clamp(18px, 2.6vw, 32px);
  --about-line: rgba(53, 224, 208, .22);
  --about-line-strong: rgba(53, 224, 208, .46);
  --about-paper-line: rgba(14, 42, 34, .14);
  background: var(--bg);
  color: var(--fg);
}

/* 面包屑 */
.page-about .about-crumb {
  padding-block: clamp(14px, 2.4vw, 26px) 0;
}

.page-about .about-crumb a {
  color: var(--mute-dark);
  text-decoration: none;
}

.page-about .about-crumb a:hover {
  color: var(--cyan);
}

/* 首屏 */
.page-about .about-hero-section {
  position: relative;
  overflow: hidden;
  padding-block: clamp(22px, 3.4vw, 44px) clamp(40px, 6vw, 84px);
  background:
    radial-gradient(110% 82% at 88% 0%, rgba(53, 224, 208, .10), transparent 60%),
    var(--ink-900);
}

.page-about .about-hero {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}

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

.page-about .about-hero__title {
  margin: 14px 0 0;
  line-height: 1.06;
  letter-spacing: -.02em;
  font-weight: 900;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 48ch;
  font-size: var(--fs-17);
  line-height: 1.85;
  color: var(--mute-dark);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 18px 20px;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: clamp(18px, 2.4vw, 26px) 0 0;
  list-style: none;
  border-top: 1px solid var(--about-line);
}

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

.page-about .about-facts__num {
  display: block;
  font-size: clamp(1.75rem, 3.4vw, 2.5rem);
  line-height: 1;
  color: var(--score);
}

.page-about .about-facts__label {
  display: block;
  margin-top: 9px;
  font-size: var(--fs-13);
  line-height: 1.6;
  color: var(--mute-dark);
}

.page-about .about-hero__media {
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--about-line);
  aspect-ratio: 16 / 9;
}

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

@media (min-width: 920px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: clamp(28px, 4vw, 64px);
  }
}

/* 主体分区 */
.page-about .about-body {
  padding-block: clamp(36px, 6vw, 84px);
}

.page-about .about-split {
  align-items: start;
}

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

/* 侧栏时间线 */
.page-about .about-tl__cap {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .22em;
  color: var(--cyan);
}

.page-about .about-tl__track {
  position: relative;
}

.page-about .about-tl__spine {
  position: absolute;
  left: 2px;
  top: 0;
  width: 18px;
  height: 100%;
  color: rgba(53, 224, 208, .30);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.3;
  pointer-events: none;
}

.page-about .about-tl__list {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl__link {
  position: relative;
  display: block;
  padding: 9px 0 9px 30px;
  color: var(--mute-dark);
  text-decoration: none;
  font-size: var(--fs-15);
  line-height: 1.5;
  transition: color .25s var(--ease);
}

.page-about .about-tl__link::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 15px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-800);
  border: 1px solid var(--about-line-strong);
  transition: background .25s var(--ease), box-shadow .25s var(--ease), transform .25s var(--ease);
}

.page-about .about-tl__link:hover {
  color: var(--paper);
}

.page-about .about-tl__link[aria-current="true"] {
  color: var(--paper);
}

.page-about .about-tl__link[aria-current="true"]::before {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 0 5px rgba(53, 224, 208, .14);
  transform: scale(1.08);
}

.page-about .about-tl__no {
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .14em;
  color: rgba(53, 224, 208, .72);
}

.page-about .about-tl__label {
  display: block;
}

@media (max-width: 899px) {
  .page-about .about-tl {
    position: static;
  }

  .page-about .about-tl__cap {
    margin-bottom: 10px;
  }

  .page-about .about-tl__spine {
    display: none;
  }

  .page-about .about-tl__list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }

  .page-about .about-tl__link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border: 1px solid var(--about-line);
    border-radius: var(--r-pill);
    white-space: nowrap;
    font-size: var(--fs-13);
  }

  .page-about .about-tl__link::before {
    display: none;
  }

  .page-about .about-tl__no {
    margin-bottom: 0;
  }
}

/* 章节 */
.page-about .about-chapter {
  margin-bottom: clamp(38px, 6vw, 76px);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

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

.page-about .about-chapter .ig-h2 {
  margin-top: 10px;
}

.page-about .about-pause {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .2em;
  color: rgba(53, 224, 208, .75);
}

.page-about .about-pause::before {
  content: "";
  display: inline-block;
  width: 30px;
  height: 1px;
  margin-right: 12px;
  vertical-align: middle;
  background: currentColor;
}

/* 贵州基地 + 角色 */
.page-about .about-duo {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.page-about .about-role {
  padding: 20px 18px;
  border-radius: var(--r-lg);
  border: 1px solid var(--about-line);
  background: linear-gradient(155deg, rgba(20, 56, 46, .95), rgba(14, 42, 34, .55));
}

.page-about .about-role__name {
  margin: 0 0 8px;
  font-size: var(--fs-17);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .about-role__desc {
  margin: 0;
  font-size: var(--fs-15);
  line-height: 1.8;
  color: var(--mute-dark);
}

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

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

@media (min-width: 800px) {
  .page-about .about-duo {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }
}

/* 里程碑 */
.page-about .about-miles {
  display: grid;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-mile {
  border: 1px solid var(--about-line);
  border-radius: var(--r-lg);
  background: rgba(14, 42, 34, .55);
  overflow: hidden;
}

.page-about .about-mile summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-17);
  font-weight: 600;
  color: var(--paper);
}

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

.page-about .about-mile summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  line-height: 1;
  color: var(--cyan);
  transition: transform .3s var(--ease);
}

.page-about .about-mile[open] summary::after {
  transform: rotate(45deg);
}

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

.page-about .about-mile__tag {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .12em;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  color: var(--cyan);
  background: rgba(53, 224, 208, .12);
  border: 1px solid rgba(53, 224, 208, .28);
}

.page-about .about-mile__body {
  margin: 0;
  padding: 0 20px 20px;
  font-size: var(--fs-15);
  line-height: 1.85;
  color: var(--mute-dark);
}

/* 纸面区块 */
.page-about .about-chapter--paper {
  padding: clamp(24px, 3.6vw, 44px);
  border-radius: var(--r-xl);
  border: 1px solid var(--about-paper-line);
  background: var(--paper);
  color: var(--ink-900);
  box-shadow: var(--shadow-card);
}

.page-about .about-chapter--paper .ig-h2 {
  color: var(--ink-900);
}

.page-about .about-chapter--paper .ig-eyebrow {
  color: var(--cyan-deep);
}

.page-about .about-chapter--paper .ig-prose p {
  color: var(--mute-paper);
}

.page-about .about-chapter--paper .ig-prose a {
  color: var(--cyan-deep);
}

.page-about .about-flow {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-flow__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 16px;
  padding: 18px 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--about-paper-line);
  background: rgba(255, 255, 255, .58);
}

.page-about .about-flow__idx {
  font-family: var(--font-mono);
  font-size: var(--fs-22);
  line-height: 1.1;
  color: var(--score-deep);
}

.page-about .about-flow__title {
  margin: 0;
  font-size: var(--fs-17);
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .about-flow__desc {
  grid-column: 2;
  margin: 0;
  font-size: var(--fs-15);
  line-height: 1.8;
  color: var(--mute-paper);
}

.page-about .about-flow__desc a {
  color: var(--cyan-deep);
}

.page-about .about-figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-paper-line);
  aspect-ratio: 4 / 3;
}

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

/* 合作伙伴 */
.page-about .about-partners {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-partner {
  padding-left: 20px;
  border-left: 2px solid var(--cyan);
}

.page-about .about-partner__name {
  margin: 0 0 6px;
  font-size: var(--fs-17);
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-partner__desc {
  margin: 0;
  font-size: var(--fs-15);
  line-height: 1.8;
  color: var(--mute-dark);
}

@media (min-width: 800px) {
  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }
}

/* 服务标准 */
.page-about .about-standards {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-std {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  padding: 18px 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--about-line);
  background: rgba(14, 42, 34, .5);
}

.page-about .about-std__k {
  flex: 0 0 150px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-std__v {
  flex: 1 1 240px;
  font-size: var(--fs-17);
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-std__d {
  flex: 1 1 100%;
  margin: 0;
  font-size: var(--fs-15);
  line-height: 1.8;
  color: var(--mute-dark);
}

/* 收尾 */
.page-about .about-cta {
  padding-block: clamp(42px, 6vw, 88px);
  background: linear-gradient(180deg, var(--ink-900), var(--ink-800));
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  max-width: 760px;
}

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

.page-about .about-cta__lede {
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.85;
  color: var(--mute-dark);
}

@media (max-width: 560px) {
  .page-about .about-std {
    padding: 16px;
  }

  .page-about .about-std__k {
    flex: 1 1 100%;
  }

  .page-about .about-chapter--paper {
    padding: 20px 18px;
  }
}
<<<END>>>