.page-about {
  --about-paper-ink: #0A0A0B;
  --about-paper-line: #D5DFE8;
  --about-paper-soft: #5B6F82;
  --about-card: #FFFFFF;
  background: var(--abyss);
  color: var(--text-on-dark);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 56px;
  background:
    radial-gradient(90% 70% at 8% -10%, rgba(37, 245, 214, .14) 0%, rgba(37, 245, 214, 0) 58%),
    linear-gradient(180deg, #05121F 0%, #071B2D 100%);
  border-bottom: 1px solid var(--trench);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -30%;
  top: -40%;
  width: 120%;
  height: 180%;
  background: repeating-linear-gradient(115deg, rgba(30, 58, 84, .5) 0 1px, transparent 1px 46px);
  opacity: .55;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -150px;
  bottom: -210px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: repeating-radial-gradient(circle at center, rgba(37, 245, 214, .18) 0 1px, transparent 1px 30px);
  opacity: .6;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .about-crumb__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-crumb__link:hover,
.page-about .about-crumb__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

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

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

.page-about .about-hero__stamp {
  margin: 24px 0 0;
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 14px 0 20px;
  font-size: clamp(32px, 8vw, 62px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.01em;
  color: #F4F7FA;
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: #C3D2E0;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  background: var(--trench);
  border: 1px solid var(--trench);
}

.page-about .about-hero__fact {
  background: #071B2D;
  padding: 16px 18px;
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .about-hero__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

/* ---------- 通用小节标题 ---------- */
.page-about .about-brief__eyebrow,
.page-about .about-flow__eyebrow,
.page-about .about-team__eyebrow,
.page-about .about-timeline__eyebrow,
.page-about .about-partners__eyebrow,
.page-about .about-standards__eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan-deep);
  text-transform: uppercase;
}

.page-about .about-brief__title,
.page-about .about-team__title,
.page-about .about-partners__title {
  margin: 0 0 20px;
  font-size: clamp(24px, 5.6vw, 40px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--about-paper-ink);
}

.page-about .about-flow__title,
.page-about .about-timeline__title,
.page-about .about-standards__title {
  margin: 0 0 20px;
  font-size: clamp(24px, 5.6vw, 40px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.01em;
  color: #F4F7FA;
}

/* ---------- 平台简介 ---------- */
.page-about .about-brief {
  background: var(--paper);
  color: var(--about-paper-ink);
  padding: 56px 0 64px;
  border-bottom: 1px solid var(--about-paper-line);
}

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

.page-about .about-brief__p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: #12222F;
}

.page-about .about-brief__list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-brief__list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.7;
  color: #12222F;
}

.page-about .about-brief__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 11px;
  height: 2px;
  background: var(--cyan-deep);
}

.page-about .about-brief__more {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-paper-soft);
}

.page-about .about-inline-link {
  color: #0B5F55;
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-deep);
  padding-bottom: 1px;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--about-paper-ink);
  border-bottom-color: var(--about-paper-ink);
}

.page-about .about-inline-link--dark {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-inline-link--dark:hover,
.page-about .about-inline-link--dark:focus-visible {
  color: #F4F7FA;
  border-bottom-color: #F4F7FA;
}

.page-about .about-brief__media {
  margin: 0;
  background: var(--dive);
  border: 1px solid var(--trench);
}

.page-about .about-brief__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .about-brief__caption {
  display: block;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
  border-top: 1px solid var(--trench);
}

/* ---------- 内容生产 ---------- */
.page-about .about-flow {
  background:
    linear-gradient(180deg, #05121F 0%, #071A2C 100%);
  color: var(--text-on-dark);
  padding: 56px 0 64px;
  border-bottom: 1px solid var(--trench);
}

.page-about .about-flow__intro {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: #C3D2E0;
}

.page-about .flow-steps {
  display: grid;
  gap: 14px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}

.page-about .flow-step {
  position: relative;
  padding: 20px 18px 24px;
  background: var(--dive);
  border-top: 2px solid var(--trench);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: border-color .2s var(--ease), transform .2s var(--ease), background-color .2s var(--ease);
}

.page-about .flow-step:hover,
.page-about .flow-step:focus-within {
  border-top-color: var(--cyan);
  background: #0D2A45;
  transform: translateY(-3px);
}

.page-about .flow-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .flow-step__title {
  margin: 10px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: #F4F7FA;
}

.page-about .flow-step__p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: #AFC2D4;
}

.page-about .about-flow__media {
  margin: 34px 0 0;
  border: 1px solid var(--trench);
  background: #061726;
}

.page-about .about-flow__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .about-flow__caption {
  display: block;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
  border-top: 1px solid var(--trench);
}

/* ---------- 团队与作者 ---------- */
.page-about .about-team {
  background: var(--paper);
  color: var(--about-paper-ink);
  padding: 56px 0 64px;
  border-bottom: 1px solid var(--about-paper-line);
}

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

.page-about .team-card {
  position: relative;
  padding: 24px 20px 26px;
  background: var(--about-card);
  border: 1px solid var(--about-paper-line);
  border-left: 3px solid var(--cyan-deep);
}

.page-about .team-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: .04em;
  color: #0B5F55;
}

.page-about .team-card__title {
  margin: 10px 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--about-paper-ink);
}

.page-about .team-card__p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-paper-soft);
}

.page-about .author-band {
  margin-top: 30px;
  padding: 26px 20px 28px;
  background: var(--abyss);
  color: var(--text-on-dark);
  border: 1px solid var(--trench);
  display: grid;
  gap: 26px;
}

.page-about .author-band__stamp {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-about .author-band__title {
  margin: 0 0 14px;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.35;
  color: #F4F7FA;
}

.page-about .author-band__p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: #B9CADB;
}

.page-about .author-band__link {
  margin: 16px 0 0;
  font-size: 14px;
}

.page-about .author-band__types {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--trench);
  border: 1px solid var(--trench);
}

.page-about .author-type {
  background: #071B2D;
  padding: 14px 16px;
}

.page-about .author-type__label {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--data);
}

.page-about .author-type__desc {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  position: relative;
  overflow: hidden;
  background: var(--abyss);
  color: var(--text-on-dark);
  padding: 56px 0 64px;
  border-bottom: 1px solid var(--trench);
}

.page-about .about-timeline__veil {
  position: absolute;
  right: -180px;
  top: -120px;
  width: 460px;
  height: 460px;
  opacity: .3;
  pointer-events: none;
}

.page-about .about-timeline__veil img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 50%;
}

.page-about .about-timeline__inner {
  position: relative;
  z-index: 1;
}

.page-about .tl {
  position: relative;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 16px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--trench) 100%);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 34px 34px;
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1px solid var(--cyan);
  background: var(--abyss);
  box-shadow: 0 0 0 5px rgba(37, 245, 214, .08);
}

.page-about .tl__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .tl__title {
  margin: 8px 0 12px;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
  color: #F4F7FA;
}

.page-about .tl__p {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.78;
  color: #AFC2D4;
}

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

/* ---------- 合作与认可 ---------- */
.page-about .about-partners {
  background: var(--paper);
  color: var(--about-paper-ink);
  padding: 56px 0 64px;
  border-bottom: 1px solid var(--about-paper-line);
}

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

.page-about .about-partners__p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: #12222F;
}

.page-about .partner-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-paper-line);
  border: 1px solid var(--about-paper-line);
}

.page-about .partner-list__item {
  display: grid;
  grid-template-columns: 84px 1fr;
  align-items: baseline;
  gap: 14px;
  padding: 18px 16px;
  background: var(--about-card);
}

.page-about .partner-list__num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: .04em;
  color: #0B5F55;
}

.page-about .partner-list__text {
  font-size: 14px;
  line-height: 1.7;
  color: #12222F;
}

/* ---------- 内容标准 ---------- */
.page-about .about-standards {
  background:
    radial-gradient(80% 60% at 100% 0%, rgba(37, 245, 214, .1) 0%, rgba(37, 245, 214, 0) 60%),
    linear-gradient(180deg, #071A2C 0%, #05121F 100%);
  color: var(--text-on-dark);
  padding: 56px 0 64px;
}

.page-about .std-grid {
  display: grid;
  gap: 14px;
}

.page-about .std-card {
  padding: 20px 18px 22px;
  background: rgba(11, 34, 57, .82);
  border: 1px solid var(--trench);
  transition: border-color .2s var(--ease);
}

.page-about .std-card:hover,
.page-about .std-card:focus-within {
  border-color: var(--cyan);
}

.page-about .std-card__title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  color: #F4F7FA;
  padding-left: 14px;
  position: relative;
}

.page-about .std-card__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--coral);
  transform: rotate(45deg);
}

.page-about .std-card__p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: #AFC2D4;
}

.page-about .about-standards__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 30px 0 0;
}

.page-about .about-link-btn {
  display: inline-block;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  color: var(--cyan);
  border: 1px solid var(--trench);
  background: rgba(5, 18, 31, .6);
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .about-link-btn:hover,
.page-about .about-link-btn:focus-visible {
  color: #05121F;
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero {
    padding: 56px 0 72px;
  }

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

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

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

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

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 64px 0 84px;
  }

  .page-about .about-brief,
  .page-about .about-flow,
  .page-about .about-team,
  .page-about .about-timeline,
  .page-about .about-partners,
  .page-about .about-standards {
    padding: 80px 0 88px;
  }

  .page-about .about-brief__grid {
    grid-template-columns: 1.15fr .85fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-partners__grid {
    grid-template-columns: .9fr 1.1fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .author-band {
    grid-template-columns: 1.05fr .95fr;
    gap: 40px;
    padding: 34px 32px 36px;
    align-items: center;
  }

  .page-about .flow-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .flow-step::after {
    content: "";
    position: absolute;
    right: -8px;
    top: 44px;
    width: 14px;
    height: 1px;
    background: var(--cyan);
    opacity: .55;
    transform: rotate(-45deg);
  }

  .page-about .flow-step:last-child::after {
    display: none;
  }

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

  .page-about .about-timeline__veil {
    width: 620px;
    height: 620px;
    right: -140px;
    top: -160px;
    opacity: .38;
  }

  .page-about .tl__item {
    padding-left: 46px;
    padding-bottom: 40px;
  }

  .page-about .std-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
<<<END>>>