.page-about {
  --about-line: rgba(176, 138, 79, 0.42);
  --about-soft: rgba(244, 235, 221, 0.72);
  padding-top: 0;
  background: var(--paper);
  color: var(--deep);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 28px) 0 46px;
  background:
    radial-gradient(115% 85% at 84% 4%, rgba(27, 46, 69, 0.95) 0%, rgba(14, 26, 43, 0) 62%),
    var(--ink);
  color: var(--paper);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(176, 138, 79, 0.1) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(176, 138, 79, 0.07) 0 1px, transparent 1px 88px);
}

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

.page-about .about-hero__crumb {
  margin-bottom: 18px;
  font-size: 12px;
}

.page-about .about-hero__crumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
}

.page-about .about-hero__crumb li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  color: rgba(244, 235, 221, 0.58);
}

.page-about .about-hero__crumb li + li::before {
  content: "/";
  color: var(--copper);
}

.page-about .about-hero__crumb a {
  color: var(--gold-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(176, 138, 79, 0.5);
  padding-bottom: 2px;
}

.page-about .about-hero__crumb a:hover,
.page-about .about-hero__crumb a:focus-visible {
  color: var(--paper-lift);
  border-bottom-color: var(--cinnabar);
}

.page-about .about-hero__frame {
  position: relative;
  padding: 22px 18px 30px;
  border: 1px solid var(--about-line);
  background: linear-gradient(180deg, rgba(27, 46, 69, 0.55) 0%, rgba(14, 26, 43, 0.1) 100%);
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 1px solid var(--copper);
  opacity: 0.85;
}

.page-about .about-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero__frame::after {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
}

.page-about .about-hero__rule {
  display: block;
  height: 7px;
  margin-bottom: 20px;
  background-image: repeating-linear-gradient(90deg, rgba(176, 138, 79, 0.55) 0 1px, transparent 1px 15px);
}

.page-about .about-hero__kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold-light);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(29px, 6.2vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper-lift);
}

.page-about .about-hero__lede {
  max-width: 58ch;
  margin: 20px 0 0;
  font-size: var(--step-base);
  line-height: 1.88;
  color: var(--about-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 32px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid rgba(176, 138, 79, 0.28);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 18px 14px;
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(23px, 4.4vw, 33px);
  font-weight: 600;
  line-height: 1.05;
  color: var(--paper-lift);
}

.page-about .about-hero__unit {
  margin-left: 2px;
  font-size: 0.55em;
  color: var(--copper);
}

.page-about .about-hero__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(244, 235, 221, 0.6);
}

/* ---------- 章节索引条 ---------- */
.page-about .about-jump {
  background: var(--paper-lift);
  border-bottom: 1px solid var(--ash);
}

.page-about .about-jump__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-about .about-jump ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-jump a {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 14px 12px;
  white-space: nowrap;
  text-decoration: none;
  font-size: 14px;
  color: var(--ink-2);
  border-bottom: 2px solid transparent;
}

.page-about .about-jump a span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cinnabar);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  border-bottom-color: var(--cinnabar);
  color: var(--ink);
}

/* ---------- 分区与章节头 ---------- */
.page-about .section {
  padding-block: clamp(46px, 7vw, 88px);
}

.page-about .about-head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-about .about-head__no {
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 52px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--copper);
}

.page-about .about-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.26;
  color: var(--ink);
}

.page-about .about-head__sub {
  margin: 0;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 02 缘起 ---------- */
.page-about .about-origin {
  background: var(--paper);
}

.page-about .about-origin__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-origin__text p {
  max-width: 62ch;
  margin: 0 0 16px;
  font-size: var(--step-base);
  line-height: 1.92;
  color: var(--deep);
}

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

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

/* ---------- 03 时间轴 ---------- */
.page-about .about-path {
  background: var(--paper-lift);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 4px 0 0 26px;
  border-left: 1px solid var(--ash);
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  gap: 4px;
  padding-bottom: 30px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--cinnabar);
}

.page-about .about-timeline__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--cinnabar);
}

.page-about .about-timeline__body h3 {
  margin: 2px 0 6px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-timeline__body p {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.86;
  color: var(--slate);
}

/* ---------- 04 团队 ---------- */
.page-about .about-team {
  background: var(--ink-2);
  color: var(--paper);
  background-image: radial-gradient(90% 70% at 12% 0%, rgba(14, 26, 43, 0.9) 0%, rgba(27, 46, 69, 0) 70%);
}

.page-about .about-team .about-head h2 {
  color: var(--paper-lift);
}

.page-about .about-team .about-head__sub {
  color: rgba(244, 235, 221, 0.68);
}

.page-about .about-team__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
}

.page-about .about-team__list li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(176, 138, 79, 0.24);
}

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

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  line-height: 1;
  color: var(--gold-light);
}

.page-about .about-team__list h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--paper-lift);
}

.page-about .about-team__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.86;
  color: rgba(244, 235, 221, 0.72);
}

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

/* ---------- 05 覆盖与原则 ---------- */
.page-about .about-reach {
  background: var(--paper);
}

.page-about .about-reach__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-reach__stats {
  display: grid;
  gap: 1px;
  border: 1px solid var(--ash);
  background: var(--ash);
}

.page-about .about-reach__stats > div {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 18px 20px;
  background: var(--paper-lift);
}

.page-about .about-reach__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 600;
  line-height: 1;
  color: var(--ink);
}

.page-about .about-reach__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-reach__num span {
  margin-left: 2px;
  font-size: 0.48em;
  color: var(--cinnabar);
}

.page-about .about-reach__principles h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-reach__principles ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: about-p;
}

.page-about .about-reach__principles li {
  position: relative;
  padding: 14px 0 14px 44px;
  border-top: 1px solid var(--ash);
  counter-increment: about-p;
  font-size: 15px;
  line-height: 1.86;
  color: var(--deep);
}

.page-about .about-reach__principles li::before {
  content: "0" counter(about-p);
  position: absolute;
  left: 0;
  top: 17px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cinnabar);
}

.page-about .about-reach__principles strong {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 06 质量与安全 ---------- */
.page-about .about-assure {
  background: var(--paper-lift);
  border-top: 1px solid var(--ash);
  border-bottom: 1px solid var(--ash);
}

.page-about .about-assure__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-assure__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-assure__list li {
  border-top: 1px solid var(--copper);
  padding-top: 14px;
}

.page-about .about-assure__list h3 {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--cinnabar);
}

.page-about .about-assure__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.86;
  color: var(--slate);
}

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

/* ---------- 07 反馈 ---------- */
.page-about .about-feedback {
  background: var(--paper);
}

.page-about .about-feedback__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-feedback__card {
  background: var(--paper-lift);
  border: 1px solid var(--ash);
  border-top: 3px solid var(--cinnabar);
  padding: 22px 20px 26px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-feedback__card h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-feedback__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.86;
  color: var(--slate);
}

/* ---------- 08 收束 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(80% 120% at 6% 100%, rgba(184, 58, 42, 0.24) 0%, rgba(184, 58, 42, 0) 62%);
}

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

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

.page-about .about-cta h2 {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.4vw, 38px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper-lift);
}

.page-about .about-cta__text > p:not(.about-cta__kicker) {
  max-width: 58ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.86;
  color: rgba(244, 235, 221, 0.75);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
}

.page-about .about-cta__actions .link-more {
  color: var(--gold-light);
}

.page-about .about-cta__actions .link-more:hover,
.page-about .about-cta__actions .link-more:focus-visible {
  color: var(--paper-lift);
}

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

/* ---------- 平板及以上 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero__frame {
    padding: 30px 28px 36px;
  }

  .page-about .about-head {
    grid-template-columns: 92px minmax(0, 1fr);
    column-gap: 26px;
    align-items: start;
  }

  .page-about .about-head__no {
    grid-row: 1 / span 2;
    padding-right: 20px;
    border-right: 1px solid var(--ash);
    text-align: right;
  }

  .page-about .about-team .about-head__no {
    border-right-color: rgba(176, 138, 79, 0.36);
  }

  .page-about .about-timeline__item {
    grid-template-columns: 158px minmax(0, 1fr);
    gap: 30px;
    padding-bottom: 34px;
  }

  .page-about .about-timeline__year {
    font-size: 15px;
    padding-top: 3px;
  }

  .page-about .about-assure__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 26px;
  }

  .page-about .about-feedback__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero h1 {
    max-width: 20ch;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-origin__figure {
    margin-top: 44px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-team__figure {
    margin-top: 40px;
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-assure__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-assure__figure {
    margin-top: 52px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 48px;
    align-items: end;
  }
}
<<<END>>>