.page-about {
  --about-grid: rgba(31, 27, 22, .035);
  background-color: var(--paper);
  background-image:
    linear-gradient(to right, var(--about-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--about-grid) 1px, transparent 1px);
  background-size: 30px 30px;
  background-position: -1px -1px;
  padding-bottom: 24px;
}

.page-about .eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-70);
  margin: 0 0 12px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 28px;
  padding-block: 16px 44px;
}

.page-about .about-hero__band {
  display: flex;
  gap: 0;
  height: 6px;
  width: 220px;
  max-width: 60%;
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 22px;
}

.page-about .about-hero__seg {
  flex: 1 1 0;
}

.page-about .about-hero__seg--spring { background: var(--spring); }
.page-about .about-hero__seg--summer { background: var(--summer); }
.page-about .about-hero__seg--autumn { background: var(--autumn); }
.page-about .about-hero__seg--winter { background: var(--winter); }

.page-about h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(28px, 5.2vw, 46px);
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--ink);
  margin: 0 0 18px;
  max-width: 20em;
}

.page-about .lede {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-70);
  margin: 0;
  max-width: 42em;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  overflow: hidden;
}

.page-about .about-fact {
  background: var(--paper-hi);
  padding: 18px 16px;
  display: grid;
  gap: 4px;
  align-content: start;
}

.page-about .about-fact__num {
  font-family: var(--mono);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-fact:nth-child(1) .about-fact__num { color: var(--spring); }
.page-about .about-fact:nth-child(2) .about-fact__num { color: var(--summer); }
.page-about .about-fact:nth-child(3) .about-fact__num { color: var(--autumn); }
.page-about .about-fact:nth-child(4) .about-fact__num { color: var(--winter); }

.page-about .about-fact__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-50);
}

@media (min-width: 940px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: end;
    gap: 52px;
    padding-block: 34px 68px;
  }
  .page-about .about-hero__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 通用区块 ---------- */
.page-about .section {
  padding-block: 46px;
}

.page-about .section__head {
  margin-bottom: 30px;
  max-width: 46em;
}

.page-about .section__head h2,
.page-about .help-split__text h2,
.page-about .about-cta__panel h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.32;
  color: var(--ink);
  margin: 0 0 14px;
}

.page-about .about-more {
  margin: 26px 0 0;
}

.page-about .link-inline {
  color: var(--winter);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-figure {
  margin: 0;
  border-radius: var(--r-l);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--sand);
}

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

.page-about .about-figure__cap {
  padding: 12px 16px 14px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-50);
  background: var(--paper-hi);
  border-top: 1px solid var(--line);
}

/* ---------- 01 起点时间线 ---------- */
.page-about .about-origin {
  background: linear-gradient(180deg, rgba(184, 205, 185, .22), rgba(184, 205, 185, 0) 68%);
}

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

.page-about .origin-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
  display: grid;
  gap: 10px;
}

.page-about .origin-timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--spring), var(--summer), var(--autumn), var(--winter));
}

.page-about .origin-timeline__item {
  position: relative;
  padding: 14px 16px;
  border-radius: var(--r-m);
  border: 1px solid transparent;
  transition: background-color .24s ease, border-color .24s ease, transform .24s ease;
}

.page-about .origin-timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 20px;
  width: 12px;
  height: 12px;
  box-sizing: content-box;
  border: 3px solid var(--spring);
  border-radius: 50%;
  background: var(--paper-hi);
  transition: transform .24s ease, border-color .24s ease;
}

.page-about .origin-timeline__item:nth-child(1)::before { border-color: var(--spring); }
.page-about .origin-timeline__item:nth-child(2)::before { border-color: var(--summer); }
.page-about .origin-timeline__item:nth-child(3)::before { border-color: var(--autumn); }
.page-about .origin-timeline__item:nth-child(4)::before { border-color: var(--winter); }

.page-about .origin-timeline__item:hover,
.page-about .origin-timeline__item:focus-within {
  background: var(--paper-hi);
  border-color: var(--line);
  transform: translateX(3px);
}

.page-about .origin-timeline__item:hover::before {
  transform: scale(1.18);
}

.page-about .origin-timeline__year {
  display: block;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--gold-deep);
  margin-bottom: 6px;
}

.page-about .origin-timeline__body h3 {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 6px;
}

.page-about .origin-timeline__body p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-70);
  margin: 0;
}

.page-about .origin-figure {
  background: var(--paper-hi);
}

@media (min-width: 880px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .9fr);
    align-items: start;
    gap: 44px;
  }
  .page-about .origin-figure {
    position: sticky;
    top: 24px;
  }
}

/* ---------- 02 四条产品线 ---------- */
.page-about .about-lines {
  background: linear-gradient(180deg, rgba(228, 87, 61, .07), rgba(228, 87, 61, 0) 60%);
}

.page-about .lineup {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .lineup__item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 30px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: var(--paper-hi);
  box-shadow: var(--shadow-s);
  transition: transform .26s ease, box-shadow .26s ease, border-color .26s ease;
}

.page-about .lineup__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--line-accent, var(--winter));
}

.page-about .lineup__item--spring { --line-accent: var(--spring); --line-tint: var(--spring-soft); }
.page-about .lineup__item--summer { --line-accent: var(--summer); --line-tint: rgba(228, 87, 61, .18); }
.page-about .lineup__item--autumn { --line-accent: var(--autumn); --line-tint: rgba(217, 164, 65, .24); }
.page-about .lineup__item--winter { --line-accent: var(--winter); --line-tint: var(--winter-soft); }

.page-about .lineup__item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-m);
  border-color: var(--line-strong);
}

.page-about .lineup__tag {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--line-tint);
  color: var(--ink);
}

.page-about .lineup__item h3 {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--line-accent);
}

.page-about .lineup__item p {
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-70);
  margin: 0;
}

.page-about .lineup__meta {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-50);
}

.page-about .lineup-figure {
  margin-top: 30px;
}

@media (min-width: 680px) {
  .page-about .lineup {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .lineup {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 03 周更记录 ---------- */
.page-about .about-records {
  background: linear-gradient(180deg, rgba(217, 164, 65, .1), rgba(217, 164, 65, 0) 62%);
}

.page-about .season-archive {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 4px 2px 14px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .season-band {
  flex: 0 0 170px;
  scroll-snap-align: start;
  min-height: 132px;
  border-radius: var(--r-m);
  padding: 18px 16px 16px;
  display: grid;
  gap: 4px;
  align-content: end;
  color: var(--ink);
  background-color: var(--spring);
  background-image: linear-gradient(150deg, rgba(255, 255, 255, .58), rgba(255, 255, 255, 0));
  box-shadow: var(--shadow-s);
}

.page-about .season-band--spring { background-color: var(--spring); }
.page-about .season-band--summer { background-color: var(--summer); }
.page-about .season-band--autumn { background-color: var(--autumn); }
.page-about .season-band--winter { background-color: var(--winter); color: var(--paper-hi); }
.page-about .season-band--winter {
  background-image: linear-gradient(150deg, rgba(255, 255, 255, .22), rgba(255, 255, 255, 0));
}

.page-about .season-band__name {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
}

.page-about .season-band__range {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  opacity: .9;
}

.page-about .season-band__note {
  font-size: 12.5px;
  line-height: 1.55;
  opacity: .82;
}

.page-about .records-note {
  border-left: 3px solid var(--autumn);
  padding: 4px 0 4px 18px;
  display: grid;
  gap: 12px;
  max-width: 46em;
}

.page-about .records-note p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-70);
  margin: 0;
}

@media (min-width: 720px) {
  .page-about .season-archive {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    overflow: visible;
    padding-bottom: 4px;
  }
  .page-about .season-band {
    flex: none;
  }
}

/* ---------- 04 帮助文档 ---------- */
.page-about .about-help {
  background: linear-gradient(180deg, rgba(62, 95, 138, .1), rgba(62, 95, 138, 0) 66%);
}

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

.page-about .help-split__text h2 {
  margin-top: 0;
}

.page-about .help-split__text p {
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink-70);
  margin: 0 0 16px;
}

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

.page-about .help-mods__chip {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .02em;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--paper-hi);
  color: var(--ink);
}

.page-about .help-split__panel {
  display: grid;
  gap: 12px;
}

.page-about .help-meter {
  border-radius: var(--r-m);
  border: 1px solid var(--line);
  background: var(--paper-hi);
  padding: 20px 18px;
  display: grid;
  gap: 4px;
  border-left: 5px solid var(--winter);
}

.page-about .help-meter--alt { border-left-color: var(--winter-soft); }
.page-about .help-meter--deep { border-left-color: var(--winter); }

.page-about .help-meter__num {
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--winter);
}

.page-about .help-meter__unit {
  font-size: 13px;
  color: var(--ink-50);
}

.page-about .help-meter__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-70);
  margin: 6px 0 0;
}

@media (min-width: 900px) {
  .page-about .help-split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .85fr);
    gap: 46px;
    align-items: start;
  }
  .page-about .help-split__panel {
    grid-template-columns: minmax(0, 1fr);
    margin-top: 8px;
  }
}

/* ---------- 05 团队与协作 ---------- */
.page-about .about-team {
  background: linear-gradient(180deg, rgba(123, 174, 127, .12), rgba(123, 174, 127, 0) 64%);
}

.page-about .deck {
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .deck__card {
  background: var(--paper-hi);
  border: 1px solid var(--line);
  border-top: 4px solid var(--deck-accent, var(--winter));
  border-radius: var(--r-m);
  padding: 20px 16px;
  display: grid;
  gap: 6px;
  align-content: start;
  box-shadow: var(--shadow-s);
}

.page-about .deck__card:nth-child(1) { --deck-accent: var(--spring); }
.page-about .deck__card:nth-child(2) { --deck-accent: var(--summer); }
.page-about .deck__card:nth-child(3) { --deck-accent: var(--autumn); }
.page-about .deck__card:nth-child(4) { --deck-accent: var(--winter); }

.page-about .deck__num {
  font-family: var(--mono);
  font-size: clamp(28px, 5vw, 38px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--ink);
}

.page-about .deck__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-50);
}

.page-about .team-grid {
  display: grid;
  gap: 28px;
}

.page-about .team-figure {
  background: var(--paper-hi);
}

.page-about .team-copy h3 {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 8px;
  padding-left: 12px;
  border-left: 4px solid var(--spring);
}

.page-about .team-copy h3 + p {
  margin-top: 0;
}

.page-about .team-copy p {
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink-70);
  margin: 0 0 22px;
}

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

@media (min-width: 760px) {
  .page-about .deck {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    gap: 44px;
    align-items: start;
  }
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding-block: 46px 60px;
}

.page-about .about-cta__panel {
  border-radius: var(--r-l);
  padding: 34px 24px 36px;
  color: var(--paper-hi);
  background-color: var(--winter);
  background-image: linear-gradient(140deg, rgba(255, 255, 255, .14), rgba(0, 0, 0, .2));
  box-shadow: var(--shadow-m);
}

.page-about .about-cta__eyebrow {
  color: rgba(246, 241, 231, .72);
  margin-bottom: 14px;
}

.page-about .about-cta__panel h2 {
  color: var(--paper-hi);
  margin-bottom: 14px;
}

.page-about .about-cta__panel p {
  font-size: 15px;
  line-height: 1.82;
  color: rgba(246, 241, 231, .86);
  margin: 0 0 24px;
  max-width: 44em;
}

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

.page-about .about-cta__btn {
  display: inline-flex;
  align-items: center;
  padding: 11px 20px;
  border-radius: 999px;
  border: 1px solid rgba(246, 241, 231, .48);
  color: var(--paper-hi);
  font-size: 14.5px;
  font-weight: 500;
  text-decoration: none;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}

.page-about .about-cta__btn:hover,
.page-about .about-cta__btn:focus-visible {
  background: var(--paper-hi);
  color: var(--winter);
  border-color: var(--paper-hi);
}

@media (min-width: 760px) {
  .page-about .about-cta__panel {
    padding: 46px 44px 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .lineup__item,
  .page-about .origin-timeline__item,
  .page-about .about-cta__btn {
    transition: none;
  }
  .page-about .origin-timeline__item:hover,
  .page-about .origin-timeline__item:focus-within {
    transform: none;
  }
}
<<<END>>>