.page-about {
  --about-gap: clamp(18px, 3vw, 34px);
  --about-glow: rgba(77, 240, 208, 0.16);
  --about-paper-line: rgba(216, 205, 184, 0.22);
  padding-bottom: clamp(48px, 8vw, 96px);
  box-sizing: border-box;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about .about-hero,
.page-about .about-block {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 首屏框景 ---------- */

.page-about .about-hero {
  margin-top: clamp(14px, 2.4vw, 26px);
}

.page-about .about-hero__frame {
  position: relative;
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(77, 240, 208, 0.10), transparent 58%),
    linear-gradient(158deg, rgba(20, 59, 47, 0.95), rgba(6, 26, 20, 0.98) 72%);
  padding: clamp(26px, 5vw, 62px) clamp(20px, 5vw, 64px) clamp(24px, 4vw, 48px);
  box-shadow: var(--stack-shadow);
  overflow: hidden;
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 9px;
  border: 1px dashed rgba(143, 174, 162, 0.20);
  pointer-events: none;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: clamp(44px, 8vw, 78px);
  height: clamp(44px, 8vw, 78px);
  border-top: 2px solid var(--cyan);
  border-left: 2px solid var(--cyan);
  pointer-events: none;
}

.page-about .about-hero__title {
  position: relative;
  margin: 14px 0 0;
  max-width: 15ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 6.4vw, 62px);
  line-height: 1.06;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-about .about-hero__lede {
  position: relative;
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: rgba(246, 241, 231, 0.86);
}

.page-about .about-hero__lede--muted {
  margin-top: 12px;
  color: var(--sage);
  font-size: 15px;
}

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

.page-about .about-hero__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(16px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__figures li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(14px, 2.4vw, 22px) clamp(14px, 2.4vw, 22px);
  background: linear-gradient(180deg, rgba(20, 59, 47, 0.72), rgba(13, 42, 33, 0.9));
}

.page-about .about-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .about-cap {
  font-size: 13px;
  line-height: 1.5;
  color: var(--sage);
}

/* ---------- 通用章节 ---------- */

.page-about .about-block {
  margin-top: clamp(46px, 7vw, 92px);
}

.page-about .about-block__head {
  position: relative;
  border-top: 1px solid var(--line-strong);
  padding-top: 18px;
}

.page-about .about-block__head::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 64px;
  height: 2px;
  background: var(--orange);
}

.page-about .about-block__title {
  margin: 10px 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.16;
  letter-spacing: 0.005em;
  color: var(--white);
}

.page-about .about-block__lede {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sage);
}

.page-about .about-note-line {
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 14px 18px;
  border-left: 3px solid var(--orange);
  background: rgba(255, 122, 61, 0.06);
  font-size: 14px;
  line-height: 1.75;
  color: rgba(246, 241, 231, 0.82);
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(20, 59, 47, 0.6), rgba(6, 26, 20, 0.9));
  padding: 10px;
  box-shadow: 5px 5px 0 rgba(4, 18, 14, 0.7);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(143, 174, 162, 0.16);
}

.page-about .about-figure__cap {
  display: block;
  margin-top: 10px;
  padding: 0 2px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--sage);
}

/* ---------- 01 品牌起点 ---------- */

.page-about .about-origin {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .about-prose p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(246, 241, 231, 0.86);
}

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

.page-about .about-points {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-points li {
  position: relative;
  padding: 12px 16px 12px 22px;
  border-left: 1px solid var(--line-cyan);
  background: rgba(13, 42, 33, 0.62);
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(246, 241, 231, 0.84);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 20px;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  transform: rotate(45deg);
}

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

/* ---------- 02 运营方法 ---------- */

.page-about .about-method {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(20px, 3vw, 34px);
}

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

.page-about .about-step {
  position: relative;
  padding: clamp(16px, 2.6vw, 24px);
  background: linear-gradient(135deg, rgba(20, 59, 47, 0.8), rgba(13, 42, 33, 0.92));
  transition: background 0.2s ease;
}

.page-about .about-step:hover,
.page-about .about-step:focus-within {
  background: linear-gradient(135deg, rgba(20, 59, 47, 0.98), rgba(6, 26, 20, 0.96));
}

.page-about .about-step__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .about-step__title {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--white);
}

.page-about .about-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--sage);
}

/* ---------- 03 团队 ---------- */

.page-about .about-team {
  margin-top: clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--line);
}

.page-about .about-team__item {
  border-bottom: 1px solid var(--line);
  background: rgba(13, 42, 33, 0.42);
}

.page-about .about-team__item[open] {
  background: rgba(20, 59, 47, 0.66);
  border-left: 2px solid var(--cyan);
}

.page-about .about-team__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 16px;
  padding: 16px 16px 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-team__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-team__item[open] .about-team__sum::after {
  content: "−";
  color: var(--orange);
}

.page-about .about-team__name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-team__meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--sage);
}

.page-about .about-team__item p {
  margin: 0;
  padding: 0 18px 20px;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(246, 241, 231, 0.82);
}

/* ---------- 04 发展历程 ---------- */

.page-about .about-timeline {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-timeline__rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-about .about-timeline__rail a {
  flex: 0 0 auto;
  padding: 7px 14px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--sage);
  background: rgba(13, 42, 33, 0.7);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-timeline__rail a:hover,
.page-about .about-timeline__rail a:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-timeline__stream {
  display: grid;
  gap: 0;
}

.page-about .about-tl {
  position: relative;
  padding: 0 0 clamp(20px, 3vw, 30px) 24px;
  border-left: 1px solid var(--line-strong);
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .about-tl:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .about-tl__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-tl__body h3 {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--white);
}

.page-about .about-tl__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(246, 241, 231, 0.8);
}

.page-about .about-figure--timeline {
  margin: clamp(4px, 1.4vw, 10px) 0 clamp(20px, 3vw, 30px) 24px;
}

/* ---------- 05 内容节奏 ---------- */

.page-about .about-editorial {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-card {
  position: relative;
  padding: clamp(18px, 2.6vw, 24px);
  border: 1px solid var(--line-strong);
  background: linear-gradient(170deg, rgba(20, 59, 47, 0.7), rgba(6, 26, 20, 0.92));
  box-shadow: 4px 4px 0 rgba(4, 18, 14, 0.6);
}

.page-about .about-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-card--blue::before {
  background: var(--blue);
}

.page-about .about-card--orange::before {
  background: var(--orange);
}

.page-about .about-card--sand::before {
  background: var(--sand);
}

.page-about .about-card__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--sage);
}

.page-about .about-card__tag {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mint);
  opacity: 0.9;
}

/* ---------- 06 合作生态 ---------- */

.page-about .about-network {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  background: rgba(13, 42, 33, 0.5);
  padding: clamp(16px, 3vw, 28px);
}

.page-about .about-network__map {
  position: relative;
  min-height: 150px;
  border: 1px solid var(--line-cyan);
  background-image:
    radial-gradient(circle, rgba(77, 240, 208, 0.5) 1.4px, transparent 1.5px),
    radial-gradient(circle, rgba(143, 174, 162, 0.26) 1.2px, transparent 1.3px);
  background-size: 34px 34px, 17px 17px;
  background-position: 0 0, 8px 9px;
  overflow: hidden;
}

.page-about .about-network__map::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 62% 42%, rgba(255, 122, 61, 0.20), transparent 46%),
    radial-gradient(circle at 26% 66%, rgba(127, 184, 255, 0.16), transparent 44%);
  pointer-events: none;
}

.page-about .about-network__dot {
  position: absolute;
  top: 40%;
  left: 58%;
  width: 12px;
  height: 12px;
  background: var(--orange);
  transform: rotate(45deg);
  box-shadow: 0 0 0 6px rgba(255, 122, 61, 0.14);
}

.page-about .about-network__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(246, 241, 231, 0.85);
}

.page-about .about-network__text p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-network__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-network__tags li {
  padding: 5px 12px;
  border: 1px solid var(--line-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--cyan);
  background: rgba(6, 26, 20, 0.6);
}

/* ---------- 07 运营保障 ---------- */

.page-about .about-reliability {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-reliability__item {
  padding: clamp(16px, 2.6vw, 24px);
  background: linear-gradient(180deg, rgba(20, 59, 47, 0.66), rgba(6, 26, 20, 0.9));
}

.page-about .about-reliability__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--sand);
  padding: 3px 9px;
  border: 1px solid var(--about-paper-line);
}

.page-about .about-reliability__title {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-reliability__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--sage);
}

/* ---------- 结尾行动区 ---------- */

.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 48px);
  padding: clamp(22px, 4vw, 40px) clamp(18px, 3.4vw, 36px);
  border: 1px solid var(--line-cyan);
  background:
    linear-gradient(120deg, rgba(77, 240, 208, 0.10), transparent 52%),
    linear-gradient(180deg, rgba(20, 59, 47, 0.9), rgba(6, 26, 20, 0.96));
  box-shadow: var(--stack-shadow);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.6vw, 32px);
  font-weight: 700;
  line-height: 1.24;
  color: var(--white);
}

.page-about .about-cta__text {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sage);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-cta__links .bf-btn {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-hero__figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-network {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: stretch;
  }

  .page-about .about-network__map {
    min-height: 100%;
  }
}

@media (min-width: 960px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-origin .about-figure {
    margin-top: 8px;
  }

  .page-about .about-method {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    align-items: start;
  }

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

  .page-about .about-timeline {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: clamp(24px, 3.6vw, 44px);
  }

  .page-about .about-timeline__rail {
    position: sticky;
    top: 104px;
    align-self: start;
    flex-direction: column;
    gap: 6px;
    overflow-x: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line);
    padding-left: 14px;
  }

  .page-about .about-timeline__rail a {
    border-color: transparent;
    background: transparent;
    padding: 4px 0;
    text-align: left;
  }

  .page-about .about-timeline__rail a:hover,
  .page-about .about-timeline__rail a:focus-visible {
    color: var(--cyan);
    background: transparent;
    border-color: transparent;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-step,
  .page-about .about-timeline__rail a {
    transition: none;
  }
}
<<<END>>>