.page-about {
  --about-block: clamp(2.75rem, 7vw, 6rem);
  --about-hair: rgba(107, 91, 69, .3);
  --about-hair-dark: rgba(240, 205, 138, .2);
  --about-soft: #EBE4D6;
  background: var(--paper);
  color: var(--text-ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .section {
  padding-block: var(--about-block);
}

.page-about .kicker {
  color: var(--wine);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(4.75rem, 9vw, 7.5rem);
  padding-bottom: 0;
  background: var(--paper);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.4vw, 3.75rem);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--ink);
  margin: .75rem 0 1.15rem;
  max-width: 18em;
}

.page-about .about-hero .lede {
  font-family: var(--font-body);
  font-size: clamp(1.0625rem, 2.2vw, 1.1875rem);
  line-height: 1.9;
  color: #36404f;
  max-width: 34em;
  margin: 0;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
}

.page-about .about-hero-figure {
  margin: clamp(2rem, 5vw, 3.5rem) 0 0;
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: clamp(190px, 38vw, 430px);
  object-fit: cover;
  object-position: center;
}

.page-about .about-hero-figure figcaption {
  max-width: var(--maxw);
  margin: .8rem auto 0;
  padding: 0 var(--gutter);
  font-size: .875rem;
  line-height: 1.75;
  color: #6d6656;
}

.page-about .about-quickbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem 1.4rem;
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  padding: 1rem 0 clamp(2.5rem, 6vw, 4rem);
  border-top: 2px solid var(--line);
}

.page-about .about-quickbar-label {
  font-family: var(--font-display);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: #7d7costs;
  color: #7d7565;
}

.page-about .about-quickbar a {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .9375rem;
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 2px solid transparent;
  transition: border-color .24s var(--ease), color .24s var(--ease);
}

.page-about .about-quickbar a:hover,
.page-about .about-quickbar a:focus-visible {
  border-bottom-color: var(--amber);
  color: #000;
}

/* ---------- 九年时间线 ---------- */
.page-about .about-years {
  background: var(--ink);
  color: var(--text-on-dark);
  position: relative;
  isolation: isolate;
}

.page-about .about-years::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: repeating-linear-gradient(
    180deg,
    rgba(240, 205, 138, .055) 0 2px,
    transparent 2px 11px
  );
  pointer-events: none;
}

.page-about .about-years .kicker { color: var(--sand); }
.page-about .about-years .section-title { color: #fff; }
.page-about .about-years .section-lede { color: rgba(230, 224, 211, .8); }

.page-about .year-band {
  list-style: none;
  margin: clamp(2rem, 5vw, 3.5rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .year-step {
  position: relative;
  padding: 0 0 1.85rem 1.7rem;
  border-left: 1px solid var(--about-hair-dark);
}

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

.page-about .year-dot {
  position: absolute;
  top: .5rem;
  left: 0;
  width: var(--dot, 12px);
  height: var(--dot, 12px);
  border-radius: 50%;
  background: var(--amber);
  transform: translate(-50%, 0);
  box-shadow: 0 0 0 5px rgba(217, 164, 65, .16);
}

.page-about .year-range {
  display: block;
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--sand);
}

.page-about .year-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.0625rem, 2.6vw, 1.25rem);
  line-height: 1.35;
  color: #fff;
  margin: .4rem 0 .55rem;
}

.page-about .year-note {
  font-size: .9375rem;
  line-height: 1.85;
  color: rgba(230, 224, 211, .74);
  margin: 0;
}

/* ---------- 项目组 ---------- */
.page-about .about-groups {
  background: var(--paper);
}

.page-about .group-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1rem, 2.5vw, 1.5rem);
  margin-top: clamp(2rem, 4.5vw, 3rem);
}

.page-about .group-card {
  position: relative;
  padding: 1.5rem 1.3rem 1.6rem;
  background: #fff;
  border: 1px solid var(--about-hair);
  border-top: 5px solid var(--amber);
  transition: box-shadow .28s var(--ease), transform .28s var(--ease);
}

.page-about .group-card:hover,
.page-about .group-card:focus-within {
  box-shadow: var(--shadow-hard-amber);
  transform: translateY(-3px);
}

.page-about .group-no {
  display: block;
  font-size: .8125rem;
  letter-spacing: .12em;
  color: var(--amber);
  margin-bottom: .55rem;
}

.page-about .group-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.25rem;
  color: var(--ink);
  margin: 0 0 .55rem;
}

.page-about .group-desc {
  font-size: .9375rem;
  line-height: 1.85;
  color: #3d4655;
  margin: 0 0 1rem;
}

.page-about .group-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .4rem .5rem;
}

.page-about .group-list li {
  font-family: var(--font-display);
  font-size: .75rem;
  letter-spacing: .02em;
  padding: .25rem .65rem;
  border: 1px solid rgba(107, 91, 69, .38);
  border-radius: var(--radius-pill);
  color: #4a4436;
  background: rgba(240, 205, 138, .16);
}

.page-about .group-foot {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  font-size: .9375rem;
  line-height: 1.9;
  color: #4a4436;
}

.page-about .group-foot a {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--wine);
  text-decoration: none;
  border-bottom: 2px solid var(--amber);
  padding-bottom: 1px;
}

/* ---------- 目录留痕 ---------- */
.page-about .about-trace {
  background: var(--ink-2);
  color: var(--text-on-dark);
  position: relative;
}

.page-about .about-trace-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3.25rem);
  align-items: center;
}

.page-about .about-trace-figure {
  margin: 0;
}

.page-about .about-trace-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid rgba(240, 205, 138, .34);
}

.page-about .about-trace-body .kicker {
  color: var(--celadon);
}

.page-about .about-trace-body .section-title {
  color: #fff;
  margin-bottom: 1.15rem;
}

.page-about .about-trace-body p {
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(230, 224, 211, .84);
  margin: 0 0 1rem;
  max-width: 34em;
}

.page-about .about-quote {
  margin: 1.5rem 0;
  padding: 1rem 1rem 1rem 1.3rem;
  border-left: 5px solid var(--amber);
  background: rgba(245, 241, 232, .07);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.0625rem, 2.4vw, 1.3125rem);
  line-height: 1.7;
  color: var(--sand);
}

.page-about .about-trace-body .btn {
  margin-top: .75rem;
}

/* ---------- 活动节奏 ---------- */
.page-about .about-activity {
  background: var(--paper);
}

.page-about .rhythm-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1rem, 2.5vw, 1.75rem);
  margin-top: clamp(2rem, 4.5vw, 3rem);
}

.page-about .rhythm-card {
  position: relative;
  padding: clamp(1.35rem, 3vw, 1.9rem) clamp(1.2rem, 2.5vw, 1.6rem);
  background: #fff;
  border: 1px solid var(--about-hair);
  border-bottom: 4px solid var(--amber);
}

.page-about .rhythm-num {
  display: block;
  font-size: .75rem;
  letter-spacing: .14em;
  color: #8a8375;
  margin-bottom: .7rem;
}

.page-about .rhythm-card h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.1875rem;
  color: var(--ink);
  margin: 0 0 .65rem;
}

.page-about .rhythm-card p {
  font-size: .9375rem;
  line-height: 1.85;
  color: #3d4655;
  margin: 0;
}

.page-about .rhythm-fit {
  margin-top: .8rem !important;
  padding-top: .8rem;
  border-top: 1px dashed var(--about-hair);
  font-size: .875rem !important;
  color: #6b6252 !important;
}

/* ---------- 服务范围 ---------- */
.page-about .about-service {
  background: var(--about-soft);
}

.page-about .about-service-banner {
  margin: 0 0 clamp(2rem, 5vw, 3.25rem);
}

.page-about .about-service-banner img {
  display: block;
  width: 100%;
  height: clamp(170px, 30vw, 340px);
  object-fit: cover;
  border-bottom: 5px solid var(--line);
}

.page-about .service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
  margin-top: clamp(2rem, 4vw, 3rem);
  align-items: start;
}

.page-about .service-subtitle {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--ink);
  margin: 0 0 1rem;
}

.page-about .step-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .step-list li {
  position: relative;
  padding: .95rem 0 .95rem 5.2rem;
  border-bottom: 1px solid var(--about-hair);
  font-size: .9375rem;
  line-height: 1.85;
  color: #3d4655;
}

.page-about .step-list li:first-child {
  border-top: 1px solid var(--about-hair);
}

.page-about .step-list .mono {
  position: absolute;
  left: 0;
  top: 1rem;
  font-size: .8125rem;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-about .service-note {
  padding: clamp(1.35rem, 3vw, 1.9rem);
  background: #fff;
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard);
}

.page-about .service-note p {
  margin: 0 0 1rem;
  font-size: .9375rem;
  line-height: 1.9;
  color: #3d4655;
}

.page-about .service-note .btn + .btn {
  margin-top: .625rem;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  background: var(--paper);
}

.page-about .partner-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: clamp(2rem, 4vw, 3rem);
  border-top: 2px solid var(--ink);
}

.page-about .partner-item {
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .partner-item h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.0625rem;
  color: var(--wine);
  margin: 0 0 .55rem;
}

.page-about .partner-item p {
  font-size: .9375rem;
  line-height: 1.9;
  color: #3d4655;
  margin: 0;
  max-width: 34em;
}

.page-about .partner-note {
  margin: clamp(1.5rem, 3.5vw, 2.25rem) 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 收尾 ---------- */
.page-about .about-closing {
  position: relative;
  isolation: isolate;
  background: var(--ink);
  color: var(--text-on-dark);
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.page-about .about-closing::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: repeating-linear-gradient(
    180deg,
    rgba(240, 205, 138, .05) 0 2px,
    transparent 2px 12px
  );
  pointer-events: none;
}

.page-about .about-closing h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.4vw, 2.375rem);
  line-height: 1.25;
  color: #fff;
  margin: 0 0 .9rem;
}

.page-about .about-closing p {
  font-size: 1.0625rem;
  line-height: 1.9;
  color: rgba(230, 224, 211, .82);
  max-width: 34em;
  margin: 0 0 1.6rem;
}

.page-about .closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 680px) {
  .page-about .rhythm-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .partner-item {
    padding: 1.6rem 1.5rem 1.6rem 0;
  }

  .page-about .partner-item + .partner-item {
    padding-left: 1.5rem;
    border-left: 1px solid var(--about-hair);
  }
}

@media (min-width: 900px) {
  .page-about .year-band {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: clamp(1rem, 2vw, 1.75rem);
  }

  .page-about .year-step {
    padding: clamp(1.4rem, 2.5vw, 2.1rem) 0 0;
    border-left: 0;
    border-top: 1px solid var(--about-hair-dark);
  }

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

  .page-about .year-dot {
    top: 0;
    left: 0;
    transform: translate(0, -50%);
  }

  .page-about .about-trace-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .service-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .group-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: clamp(1rem, 2vw, 1.5rem);
  }

  .page-about .group-card {
    grid-column: span 2;
  }

  .page-about .group-card:nth-child(4),
  .page-about .group-card:nth-child(5) {
    grid-column: span 3;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero .lede {
    font-size: 1.1875rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .group-card {
    transition: none;
  }

  .page-about .group-card:hover,
  .page-about .group-card:focus-within {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --dot: 1rem;
}