.page-about {
  --about-num-col: 88px;
  --about-note-col: 60px;
}

/* 面包屑 */
.page-about .breadcrumb {
  padding-top: 18px;
  font-size: 13px;
}

/* 框景首屏 */
.page-about .about-manifesto {
  padding-top: 16px;
}

.page-about .about-manifesto__frame {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  margin-top: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(158deg, var(--ink-2) 0%, var(--ink) 64%);
  overflow: hidden;
}

.page-about .about-manifesto__frame::before,
.page-about .about-manifesto__frame::after {
  content: "";
  position: absolute;
  width: 26px;
  height: 26px;
  border: 2px solid var(--lime);
  pointer-events: none;
  z-index: 3;
}

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

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

.page-about .about-manifesto__body {
  padding: 26px 20px 30px;
}

.page-about .about-manifesto h1 {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(32px, 7.4vw, 62px);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-manifesto__lead {
  margin: 0 0 14px;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.8;
  color: var(--paper);
}

.page-about .about-manifesto__text {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-manifesto__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-manifesto__media {
  position: relative;
  min-height: 220px;
  overflow: hidden;
}

.page-about .about-manifesto__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.06);
}

.page-about .about-manifesto__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 26, 22, 0.08) 0%, rgba(6, 26, 22, 0.9) 100%),
    repeating-linear-gradient(90deg, rgba(30, 74, 60, 0.3) 0 1px, transparent 1px 46px);
  pointer-events: none;
}

/* 编号章节骨架 */
.page-about .about-chapter {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding: 34px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-chapter__no {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--lime);
  opacity: 0.32;
}

.page-about .about-chapter h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(23px, 4.6vw, 38px);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-chapter__lead {
  margin: 0 0 24px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

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

/* 三条原则 */
.page-about .about-principles__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-principle {
  position: relative;
  padding: 22px 20px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
}

.page-about .about-principle::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 2px;
  background: var(--lime);
}

.page-about .about-principle__idx {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .about-principle h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-principle p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

/* 校对流程 */
.page-about .about-proof__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: start;
}

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

.page-about .about-proof__figure .figure__media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.page-about .about-proof__figure .figure__caption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

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

.page-about .about-flow__item {
  position: relative;
  padding-left: 26px;
}

.page-about .about-flow__item::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 6px;
  width: 1px;
  background: var(--line);
}

.page-about .about-flow__item:first-child::before {
  top: 22px;
}

.page-about .about-flow__item:last-child::before {
  bottom: auto;
  height: 22px;
}

.page-about .about-flow__item::after {
  content: "";
  position: absolute;
  top: 18px;
  left: 1px;
  width: 11px;
  height: 11px;
  border: 2px solid var(--lime);
  border-radius: 50%;
  background: var(--ink);
}

.page-about .about-flow__details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
}

.page-about .about-flow__details[open] {
  border-color: rgba(200, 255, 61, 0.42);
}

.page-about .about-flow__summary {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 13px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-flow__summary::after {
  content: "＋";
  margin-left: auto;
  font-size: 14px;
  color: var(--muted);
}

.page-about .about-flow__details[open] .about-flow__summary::after {
  content: "－";
  color: var(--lime);
}

.page-about .about-flow__step {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-about .about-flow__details p {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

/* 团队 Bento */
.page-about .about-team__bento {
  margin-top: 4px;
}

.page-about .about-team__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  justify-content: flex-end;
  min-height: 108px;
}

.page-about .about-team__num {
  font-family: var(--font-display);
  font-size: clamp(30px, 5.6vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-team__label {
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-team__scope h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-team__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 14px;
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}

.page-about .about-team__facts li {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-team__facts .num {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team__scope > p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-about .about-team__figure .figure__media {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.page-about .about-team__figure .figure__caption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* 版本演进时间线 */
.page-about .about-timeline__list {
  position: relative;
  margin: 0;
  padding: 0 0 0 20px;
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 26px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 5px;
  left: -25px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--lime);
  border-radius: 50%;
  background: var(--glass);
}

.page-about .about-timeline__item:last-child::before {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 255, 61, 0.14);
}

.page-about .about-timeline__item h3 {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-timeline__item p {
  margin: 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

/* 会员服务 */
.page-about .about-service__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-service__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-service__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-service__card--wide .btn {
  margin-top: 16px;
}

.page-about .about-service__note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--line);
  font-size: 13px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-service__note a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, 0.4);
}

.page-about .about-service__note a:hover {
  color: var(--lime-soft);
}

/* 收束区 */
.page-about .about-next__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: center;
  padding: 26px 22px;
}

.page-about .about-next__text h2 {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(22px, 4.4vw, 32px);
  font-weight: 600;
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-next__text p {
  margin: 0;
  max-width: 38em;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 620px) {
  .page-about .about-manifesto__body {
    padding: 32px 28px 36px;
  }

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

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

  .page-about .about-service__card--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-chapter {
    grid-template-columns: var(--about-num-col) minmax(0, 1fr) auto;
    gap: 30px;
    padding: 54px 0;
    align-items: start;
  }

  .page-about .about-chapter__no {
    font-size: 64px;
    opacity: 0.26;
  }

  .page-about .about-chapter__lead {
    font-size: 16px;
    margin-bottom: 28px;
  }

  .page-about .about-manifesto__frame {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-manifesto__body {
    padding: 46px 42px;
  }

  .page-about .about-manifesto__media {
    min-height: 100%;
    border-left: 1px solid var(--line);
  }

  .page-about .about-proof__grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: 28px;
  }

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

  .page-about .about-timeline__list {
    padding-left: 26px;
  }

  .page-about .about-timeline__item {
    padding-bottom: 30px;
  }

  .page-about .about-timeline__item::before {
    left: -31px;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    padding: 36px 34px;
  }

  .page-about .about-next__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1100px) {
  .page-about .about-chapter {
    grid-template-columns: var(--about-num-col) minmax(0, 1fr) var(--about-note-col);
  }

  .page-about .about-chapter__note {
    display: flex;
    justify-content: flex-end;
    align-items: flex-start;
  }

  .page-about .about-chapter__note .annotation {
    writing-mode: vertical-rl;
    font-size: 12px;
    line-height: 1.4;
    letter-spacing: 0.28em;
    color: var(--muted);
    border-left: 1px solid var(--line);
    padding-left: 10px;
  }

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

  .page-about .about-service__card--wide {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-manifesto__frame::before,
  .page-about .about-manifesto__frame::after {
    transition: none;
  }
}
<<<END>>>