.page-about {
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 26px;
  padding: 20px 0 40px;
}

.page-about .about-hero__body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.95rem, 5.4vw, 3.5rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--c-moss);
}

.page-about .about-hero .lede {
  max-width: 36em;
  color: var(--c-ink);
}

.page-about .about-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 6px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1.5px solid var(--c-line);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-hero__num {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-pulp);
}

.page-about .about-hero__label {
  font-size: 0.875rem;
  color: var(--c-stone);
}

.page-about .about-hero__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-surface-2);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

/* ---------- 藤蔓骨架 ---------- */
.page-about .vine {
  position: relative;
  padding-left: 46px;
  padding-bottom: 8px;
}

.page-about .vine__stem {
  position: absolute;
  left: 2px;
  top: 0;
  width: 40px;
  height: 100%;
  pointer-events: none;
}

.page-about .vine__stem path {
  fill: none;
  stroke: var(--c-pulp);
  stroke-width: 1.5;
  stroke-linecap: round;
  opacity: 0.42;
}

.page-about .vine__item {
  position: relative;
  margin-bottom: 30px;
}

.page-about .vine__item:last-of-type {
  margin-bottom: 16px;
}

.page-about .vine__node {
  position: absolute;
  left: -46px;
  top: 6px;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid var(--c-pulp);
  background: var(--c-ivory);
  color: var(--c-moss);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}

.page-about .vine__node.is-revealed,
.page-about .vine__node:hover,
.page-about .vine__node:focus-visible {
  background: var(--c-pulp);
  border-color: var(--c-pulp);
  color: var(--c-ivory);
}

.page-about .vine__body {
  padding: 22px 20px 24px;
}

.page-about .vine__body .section-title {
  margin: 6px 0 12px;
}

.page-about .vine__body p {
  max-width: 36em;
  color: var(--c-ink);
}

.page-about .vine__note {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1.5px dashed var(--c-line);
  font-size: 0.9375rem;
  color: var(--c-stone);
}

.page-about .vine__body a {
  color: var(--c-terrace);
  text-underline-offset: 3px;
}

/* ---------- 果园档案字段 ---------- */
.page-about .fields {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1.5px solid var(--c-line);
}

.page-about .fields__row {
  display: grid;
  grid-template-columns: minmax(88px, 34%) 1fr;
  gap: 4px 14px;
  padding: 11px 0;
  border-bottom: 1.5px solid var(--c-line);
}

.page-about .fields__name {
  font-weight: 700;
  color: var(--c-moss);
}

.page-about .fields__desc {
  font-size: 0.9375rem;
  color: var(--c-stone);
}

.page-about .fields__more {
  margin-top: 12px;
}

.page-about .fields__more summary {
  display: inline-block;
  padding: 8px 14px;
  border: 1.5px solid var(--c-pulp);
  border-radius: 999px;
  color: var(--c-moss);
  font-size: 0.875rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .fields__more summary::after {
  content: " ＋";
  font-family: var(--font-mono);
}

.page-about .fields__more[open] summary::after {
  content: " －";
}

.page-about .fields__more .fields {
  margin-top: 12px;
}

/* ---------- 田间作业步骤 ---------- */
.page-about .steps {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .steps__item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-top: 1.5px solid var(--c-line);
}

.page-about .steps__num {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--r-sm);
  background: var(--c-wash-strong);
  color: var(--c-moss);
  font-size: 0.8125rem;
}

.page-about .steps__title {
  margin: 4px 0 4px;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--c-moss);
}

.page-about .steps__item p {
  margin: 0;
  font-size: 0.9375rem;
}

/* ---------- 预冷与冷链 ---------- */
.page-about .cold__media {
  margin: 18px 0 16px;
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--c-surface-2);
}

.page-about .cold__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

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

.page-about .chain__seg {
  position: relative;
  display: grid;
  gap: 2px;
  padding: 12px 14px 12px 16px;
  border-left: 3px solid var(--c-terrace);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--c-surface-2);
}

.page-about .chain__seg b {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  color: var(--c-moss);
}

.page-about .chain__seg span:last-child {
  font-size: 0.875rem;
  color: var(--c-stone);
}

.page-about .chain__idx {
  font-size: 0.75rem;
  color: var(--c-terrace);
}

/* ---------- 溯源码身份卡 ---------- */
.page-about .idcard {
  margin: 18px 0 4px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .idcard__item {
  display: grid;
  gap: 3px;
  padding: 14px 16px;
  border-radius: var(--r-md);
  background: var(--c-wash);
  border: 1.5px solid rgba(62, 155, 87, 0.28);
}

.page-about .idcard__key {
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--c-peel);
}

.page-about .idcard__item b {
  font-family: var(--font-display);
  color: var(--c-moss);
}

.page-about .idcard__item span:last-child {
  font-size: 0.875rem;
  color: var(--c-stone);
}

/* ---------- 团队分工 ---------- */
.page-about .crew {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .crew__row {
  display: grid;
  gap: 8px;
  padding: 14px 0;
  border-top: 1.5px solid var(--c-line);
}

.page-about .crew__tag {
  justify-self: start;
}

.page-about .crew__row p {
  margin: 0;
  font-size: 0.9375rem;
}

/* ---------- 通栏横图 ---------- */
.page-about .vine__figure {
  margin: 6px 0 30px -46px;
  padding: 0;
}

.page-about .vine__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 5;
  object-fit: cover;
  border-radius: 0 var(--r-lg) var(--r-lg) 0;
  background: var(--c-surface-2);
}

.page-about .vine__caption {
  margin-top: 10px;
  padding-left: 46px;
  font-size: 0.875rem;
  color: var(--c-stone);
}

/* ---------- 产区分段控件 ---------- */
.page-about .regions {
  margin-top: 20px;
}

.page-about .regions__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .regions__tab {
  --acc: var(--c-pulp);
  flex: 1 1 96px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 14px;
  border: 1.5px solid var(--acc);
  border-radius: var(--r-md);
  background: var(--c-ivory);
  box-shadow: inset 4px 0 0 var(--acc);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--c-moss);
  text-align: left;
  cursor: pointer;
  transition: background-color 180ms ease, color 180ms ease;
}

.page-about .regions__tab--lead {
  flex: 1.6 1 130px;
}

.page-about .regions__tab[aria-selected="true"] {
  background: var(--acc);
  color: #fff;
}

.page-about .regions__name {
  font-weight: 700;
}

.page-about .regions__num {
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  opacity: 0.82;
}

.page-about #tab-yn { --acc: var(--c-moss); }
.page-about #tab-sc { --acc: var(--c-pulp); }
.page-about #tab-gz { --acc: var(--c-terrace); }
.page-about #tab-sx { --acc: var(--c-gold); }
.page-about #tab-gx { --acc: var(--c-clay); }

.page-about #tab-sx[aria-selected="true"] {
  color: var(--c-ink);
}

.page-about .regions__panels {
  margin-top: 14px;
}

.page-about .regions__panel[hidden] {
  display: none;
}

.page-about .regions__panel p {
  margin: 0 0 12px;
  padding: 14px 16px;
  border-radius: var(--r-md);
  background: var(--c-surface-2);
  font-size: 0.9375rem;
  color: var(--c-ink);
}

/* ---------- 阶段时间轴 ---------- */
.page-about .stages {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 4px;
}

.page-about .stages__item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  padding: 12px 0 12px 0;
  border-left: 1.5px solid var(--c-terrace-soft);
  padding-left: 14px;
}

.page-about .stages__mark {
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--c-peel);
}

.page-about .stages__item b {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-display);
  color: var(--c-moss);
}

.page-about .stages__item p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--c-ink);
}

/* ---------- 焦点环 ---------- */
.page-about a:focus-visible,
.page-about button:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- 平板与小桌面 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .steps,
  .page-about .idcard {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

  .page-about .crew__row {
    grid-template-columns: 120px 1fr;
    align-items: start;
    gap: 14px;
  }
}

/* ---------- 桌面：左右交替的藤蔓版式 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: end;
    gap: 44px;
    padding: 30px 0 56px;
  }

  .page-about .about-hero__media {
    margin-right: calc(var(--gutter) * -1);
    border-radius: var(--r-lg) 0 0 var(--r-lg);
  }

  .page-about .vine {
    padding-left: 0;
  }

  .page-about .vine__stem {
    left: calc(40% + 12px);
    width: 40px;
  }

  .page-about .vine__item {
    width: 38%;
    margin-bottom: 52px;
  }

  .page-about .vine__item--end {
    width: 46%;
    margin-left: auto;
  }

  .page-about .vine__item .vine__node {
    left: auto;
    right: -57px;
  }

  .page-about .vine__item--end .vine__node {
    right: auto;
    left: -57px;
  }

  .page-about .vine__body {
    padding: 26px 26px 28px;
  }

  .page-about .vine__figure {
    margin: 8px 0 56px 0;
  }

  .page-about .vine__figure img {
    aspect-ratio: 7 / 4;
    border-radius: var(--r-lg);
  }

  .page-about .vine__caption {
    padding-left: 0;
  }

  .page-about .cold__media {
    margin: 20px 0 20px -22px;
    width: calc(100% + 22px);
    border-radius: var(--r-md);
  }

  .page-about .chain {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
  }

  .page-about .chain__seg {
    border-left: none;
    border-top: 3px solid var(--c-terrace);
    border-radius: 0 0 var(--r-sm) var(--r-sm);
    padding: 12px 12px 14px;
  }

  .page-about .stages__item {
    grid-template-columns: 48px 1fr;
  }
}

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