.page-about {
  --about-rule: 1px solid var(--edge);
  --about-tilt: -1.5deg;
  display: block;
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

.page-about a:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: 4px;
}

/* 面包屑 */
.page-about .about-crumbs {
  padding-top: clamp(16px, 3vw, 34px);
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-2);
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  color: var(--gold);
  margin-right: 8px;
}

.page-about .breadcrumbs a {
  color: var(--ink-2);
  text-decoration: none;
  transition: color 0.25s ease;
}

.page-about .breadcrumbs a:hover {
  color: var(--crimson);
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.6vw, 40px);
  align-items: start;
  padding: clamp(26px, 5vw, 56px) 0 clamp(36px, 6vw, 76px);
}

.page-about .about-hero__aside {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .about-vert {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--ink-2);
  white-space: nowrap;
}

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

.page-about .about-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--crimson);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-size: clamp(38px, 8.6vw, 92px);
  line-height: 1.04;
  letter-spacing: -0.03em;
  font-weight: 900;
}

.page-about .about-lede {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.9;
  color: var(--ink-2);
}

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

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2000 / 1100;
  object-fit: cover;
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  box-shadow: var(--shadow-2);
}

/* 章节索引 */
.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 0 clamp(26px, 4vw, 46px);
}

.page-about .about-index__link {
  display: inline-block;
  padding: 8px 13px;
  border: 1px solid var(--edge);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ink-2);
  text-decoration: none;
  transition: border-color 0.25s ease, color 0.25s ease, background-color 0.25s ease;
}

.page-about .about-index__link:hover {
  border-color: var(--gold);
  color: var(--ink);
}

.page-about .about-index__link[data-active="true"] {
  border-color: var(--gold);
  color: var(--crimson);
  background: rgba(200, 160, 44, 0.09);
}

/* 章节 */
.page-about .about-sec {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.6vw, 34px);
  padding: clamp(48px, 7vw, 104px) 0;
  border-top: var(--about-rule);
  scroll-margin-top: 80px;
}

.page-about .about-sec__mark {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .about-num {
  display: inline-block;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--edge);
  font-family: var(--font-mono);
  font-size: clamp(44px, 5.8vw, 88px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: var(--gold);
  text-decoration: none;
  transition: border-color 0.3s ease, color 0.3s ease;
}

.page-about .about-num:hover {
  border-bottom-color: var(--gold);
  color: var(--vermilion);
}

.page-about .about-sec__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-2);
}

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

.page-about .about-sec__body h2 {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-size: clamp(26px, 3.4vw, 46px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.page-about .about-sec__body p {
  margin: 0 0 1.05em;
  max-width: 62ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.95;
}

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

/* 图文交错 */
.page-about .about-grid-2 {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  align-items: center;
}

.page-about .about-figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}

/* 数据带 */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(20px, 3vw, 32px) 0 0;
  background: var(--edge);
  border: 1px solid var(--edge);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-stat {
  background: var(--paper);
  padding: clamp(14px, 2vw, 22px);
}

.page-about .about-stat__num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: clamp(21px, 2.6vw, 30px);
  font-weight: 700;
  color: var(--crimson);
}

.page-about .about-stat__cap {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--ink-2);
}

/* 时间轴 */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0 0 0 clamp(20px, 3vw, 32px);
  border-left: 1px solid var(--edge);
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-about .about-timeline > li {
  position: relative;
}

.page-about .about-timeline > li::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(20px, 3vw, 32px) - 6px);
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--gold);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.page-about .about-timeline > li:hover::before,
.page-about .about-timeline > li:focus-within::before {
  box-shadow: 0 0 0 6px rgba(62, 224, 206, 0.25);
  transform: scale(1.3);
}

.page-about .about-ver {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--crimson);
}

.page-about .about-ver__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.8vw, 21px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .about-timeline p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-2);
}

/* 引用 */
.page-about .about-quote {
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  padding: 8px 0 8px clamp(14px, 2vw, 22px);
  max-width: 30ch;
  border-left: 3px solid var(--crimson);
  font-size: clamp(17px, 2vw, 22px);
  font-style: italic;
  line-height: 1.55;
  color: var(--ink);
}

/* 三道关 */
.page-about .about-gates {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  background: var(--edge);
  border: 1px solid var(--edge);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-gate {
  background: var(--paper);
  padding: clamp(16px, 2.2vw, 26px);
}

.page-about .about-gate__k {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .about-gate__t {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
}

.page-about .about-gate p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* 文字链接 */
.page-about .about-link {
  color: var(--crimson);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 3px;
  transition: color 0.25s ease, text-decoration-color 0.25s ease;
}

.page-about .about-link:hover {
  color: var(--vermilion);
  text-decoration-color: var(--vermilion);
}

/* 服务承诺 深色带 */
.page-about #promise {
  padding-bottom: clamp(40px, 6vw, 76px);
  scroll-margin-top: 80px;
}

.page-about .about-commit {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 68px);
  background: var(--midnight);
  color: var(--paper);
  border-radius: var(--radius);
  box-shadow: var(--shadow-2);
}

.page-about .about-commit::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -58%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(62, 224, 206, 0.22), transparent 68%);
  pointer-events: none;
}

.page-about .about-commit__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 44px);
}

.page-about .about-commit__title {
  margin: 0 0 14px;
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-commit__text {
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  max-width: 52ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.9;
  color: rgba(247, 242, 232, 0.78);
}

.page-about .about-commit__facts {
  display: grid;
  gap: 12px;
  align-content: end;
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-about .about-commit__fact {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(200, 160, 44, 0.42);
  color: rgba(247, 242, 232, 0.85);
}

.page-about .about-commit__facts .about-link {
  color: var(--gold);
  text-decoration-color: rgba(200, 160, 44, 0.5);
}

.page-about .about-commit__facts .about-link:hover {
  color: var(--neon);
  text-decoration-color: var(--neon);
}

.page-about .about-neon {
  color: var(--neon);
}

/* 平板与桌面 */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-gates {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-commit__inner {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: end;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: 64px minmax(0, 1.05fr) minmax(0, 1fr);
    gap: clamp(28px, 3.6vw, 48px);
  }

  .page-about .about-hero__aside {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-about .about-vert {
    writing-mode: vertical-rl;
    letter-spacing: 0.34em;
  }

  .page-about .about-sec {
    grid-template-columns: 122px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 60px);
  }

  .page-about .about-sec__mark {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .page-about .about-grid-2 {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }

  .page-about .about-grid-2--flip > .about-figure {
    order: 2;
  }
}

@media (min-width: 1180px) {
  .page-about .about-figure--out {
    margin-right: -40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-num,
  .page-about .about-index__link,
  .page-about .about-timeline > li::before,
  .page-about .about-link,
  .page-about .breadcrumbs a {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>