.page-about {
  background:
    radial-gradient(120% 68% at 88% 0%, rgba(201, 162, 39, 0.10), transparent 62%),
    var(--obsidian);
  color: var(--text);
}

.page-about .section {
  padding-top: var(--space-5);
  padding-bottom: var(--space-5);
}

.page-about .breadcrumb {
  padding: var(--space-4) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--text-faint);
}
.page-about .breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--champagne);
}
.page-about .breadcrumb__sep {
  margin: 0 10px;
  color: var(--text-faint);
}

.page-about .index-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 var(--space-2);
}

.page-about .block-head {
  max-width: 62ch;
  margin-bottom: var(--space-5);
}
.page-about .block-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.7rem, 5vw, 2.9rem);
  line-height: 1.16;
  letter-spacing: 0.02em;
  color: var(--ivory);
  margin: 0 0 var(--space-3);
}
.page-about .block-lead {
  color: var(--text-muted);
  line-height: 1.85;
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: var(--space-4);
  padding-bottom: var(--space-6);
}
.page-about .about-hero__inner {
  display: grid;
  gap: var(--space-5);
}
.page-about .about-hero__copy h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.1rem, 8.2vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: 0.02em;
  color: var(--ivory);
  margin: 0 0 var(--space-4);
}
.page-about .about-hero__copy .lead {
  font-size: clamp(1rem, 2.6vw, 1.15rem);
  line-height: 1.78;
  color: var(--champagne);
  max-width: 44ch;
  margin: 0;
}
.page-about .about-hero__text {
  margin: var(--space-3) 0 0;
  color: var(--text-muted);
  line-height: 1.85;
  max-width: 48ch;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-4);
  margin-top: var(--space-5);
}
.page-about .link-more {
  display: inline-block;
  font-size: 14px;
  color: var(--champagne);
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold);
  padding-bottom: 2px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-about .link-more:hover,
.page-about .link-more:focus-visible {
  color: var(--gold);
  border-color: var(--line-gold-strong);
}
.page-about .about-hero__visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-gold);
  box-shadow: var(--shadow-card);
}
.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 理念 ---------- */
.page-about .about-idea {
  border-top: 1px solid var(--line-soft);
}
.page-about .about-idea__grid {
  display: grid;
  gap: var(--space-5);
}
.page-about .about-idea__body p {
  color: var(--text-muted);
  line-height: 1.9;
  margin: 0 0 var(--space-3);
  max-width: 52ch;
}
.page-about .about-idea__body p:last-child {
  margin-bottom: 0;
}
.page-about .about-idea__quote {
  margin: 0;
  padding: var(--space-3) 0 var(--space-3) var(--space-4);
  border-left: 2px solid var(--line-gold-strong);
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.25rem, 4.4vw, 1.9rem);
  line-height: 1.42;
  color: var(--champagne);
  letter-spacing: 0.01em;
}
.page-about .about-idea__quote p {
  margin: 0;
}

/* ---------- 权益 ---------- */
.page-about .about-rights {
  border-top: 1px solid var(--line-soft);
}
.page-about .about-rights__visual {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  margin: 0 0 var(--space-5);
}
.page-about .about-rights__visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-rights__tabs {
  position: relative;
}
.page-about .about-rights__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.page-about .about-rights__labels {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.page-about .about-rights__labels label {
  cursor: pointer;
  user-select: none;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease);
}
.page-about #rt-account:focus-visible ~ .about-rights__labels label[for="rt-account"],
.page-about #rt-path:focus-visible ~ .about-rights__labels label[for="rt-path"],
.page-about #rt-docs:focus-visible ~ .about-rights__labels label[for="rt-docs"],
.page-about #rt-news:focus-visible ~ .about-rights__labels label[for="rt-news"] {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
.page-about #rt-account:checked ~ .about-rights__labels label[for="rt-account"],
.page-about #rt-path:checked ~ .about-rights__labels label[for="rt-path"],
.page-about #rt-docs:checked ~ .about-rights__labels label[for="rt-docs"],
.page-about #rt-news:checked ~ .about-rights__labels label[for="rt-news"] {
  background: rgba(201, 162, 39, 0.16);
  border-color: var(--line-gold-strong);
  color: var(--champagne);
}
.page-about .about-rights__panels {
  border-top: 1px solid var(--line-gold);
  padding-top: var(--space-4);
}
.page-about .about-rights__panel {
  display: none;
}
.page-about #rt-account:checked ~ .about-rights__panels > .about-rights__panel:nth-child(1),
.page-about #rt-path:checked ~ .about-rights__panels > .about-rights__panel:nth-child(2),
.page-about #rt-docs:checked ~ .about-rights__panels > .about-rights__panel:nth-child(3),
.page-about #rt-news:checked ~ .about-rights__panels > .about-rights__panel:nth-child(4) {
  display: block;
}
.page-about .about-rights__panel h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.15rem;
  color: var(--ivory);
  margin: 0 0 var(--space-2);
  letter-spacing: 0.02em;
}
.page-about .about-rights__panel p {
  color: var(--text-muted);
  line-height: 1.8;
  margin: 0 0 var(--space-4);
  max-width: 52ch;
}
.page-about .about-rights__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.page-about .about-rights__list li {
  background: var(--graphite);
  padding: 12px var(--space-3);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.page-about .about-rights__list li::before {
  content: "";
  flex: 0 0 auto;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  transform: translateY(-2px);
}
.page-about .about-rights__list li:hover {
  background: var(--slate);
  color: var(--ivory);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  border-top: 1px solid var(--line-soft);
}
.page-about .about-timeline__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: var(--space-5);
}
.page-about .about-timeline__nav a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-decoration: none;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-pill);
  padding: 6px 16px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.page-about .about-timeline__nav a:hover,
.page-about .about-timeline__nav a:focus-visible {
  color: var(--champagne);
  border-color: var(--line-gold-strong);
  background: rgba(201, 162, 39, 0.10);
  outline: 2px solid transparent;
}
.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(201, 162, 39, 0.06) 100%);
}
.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 var(--space-5) 34px;
  scroll-margin-top: 110px;
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--line-gold-strong);
  background: var(--obsidian);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.12);
  transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.page-about .about-timeline__item:target::before,
.page-about .about-timeline__item:hover::before {
  background: var(--gold);
  box-shadow: 0 0 0 6px rgba(201, 162, 39, 0.20);
}
.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 6px;
}
.page-about .about-timeline__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.18rem;
  line-height: 1.4;
  color: var(--ivory);
  margin: 0 0 var(--space-2);
  letter-spacing: 0.02em;
}
.page-about .about-timeline__text {
  color: var(--text-muted);
  line-height: 1.85;
  margin: 0;
  max-width: 58ch;
}
.page-about .about-timeline__visual {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  margin: var(--space-5) 0 0;
}
.page-about .about-timeline__visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 三条内容线 ---------- */
.page-about .about-lines {
  border-top: 1px solid var(--line-soft);
}
.page-about .about-lines__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.page-about .about-lines__item {
  background: var(--obsidian);
  padding: var(--space-4) 0;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: var(--space-3);
  transition: background 0.3s var(--ease);
}
.page-about .about-lines__item:hover {
  background: var(--graphite);
}
.page-about .about-lines__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--amber);
  padding-top: 4px;
}
.page-about .about-lines__body h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.14rem;
  line-height: 1.4;
  color: var(--ivory);
  margin: 0 0 var(--space-2);
  letter-spacing: 0.02em;
}
.page-about .about-lines__body p {
  color: var(--text-muted);
  line-height: 1.85;
  margin: 0 0 var(--space-3);
  max-width: 62ch;
}
.page-about .about-lines__tail {
  margin: var(--space-4) 0 0;
  color: var(--text-muted);
  line-height: 1.8;
}
.page-about .about-lines__tail a {
  color: var(--champagne);
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold);
}
.page-about .about-lines__tail a:hover,
.page-about .about-lines__tail a:focus-visible {
  color: var(--gold);
}

/* ---------- 地区与服务时段 ---------- */
.page-about .about-region {
  border-top: 1px solid var(--line-soft);
  padding-bottom: var(--space-6);
}
.page-about .about-region__grid {
  display: grid;
  gap: var(--space-5);
}
.page-about .about-region__text {
  color: var(--text-muted);
  line-height: 1.9;
  margin: 0 0 var(--space-4);
  max-width: 56ch;
}
.page-about .about-region__meta {
  margin: 0;
  border-top: 1px solid var(--line-gold);
}
.page-about .about-region__row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: var(--space-3);
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-about .about-region__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  padding-top: 3px;
}
.page-about .about-region__row dd {
  margin: 0;
  color: var(--ivory);
  font-size: 15px;
  line-height: 1.65;
  word-break: break-word;
}
.page-about .about-region__cta {
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  background: linear-gradient(155deg, rgba(201, 162, 39, 0.12), rgba(28, 29, 32, 0.9) 62%);
  padding: var(--space-4);
  box-shadow: var(--shadow-card);
}
.page-about .about-region__cta p {
  color: var(--text-muted);
  line-height: 1.85;
  margin: 0 0 var(--space-4);
}
.page-about .about-region__cta .btn {
  width: 100%;
  text-align: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 860px) {
  .page-about .section {
    padding-top: var(--space-6);
    padding-bottom: var(--space-6);
  }
  .page-about .breadcrumb {
    padding-top: var(--space-5);
  }
  .page-about .about-hero {
    padding-top: var(--space-3);
  }
  .page-about .about-hero__inner {
    grid-template-columns: 8fr 5fr;
    align-items: center;
    gap: var(--space-6);
  }
  .page-about .about-hero__visual {
    aspect-ratio: 3 / 4;
  }
  .page-about .about-idea__grid {
    grid-template-columns: 5fr 6fr;
    gap: var(--space-6);
    align-items: start;
  }
  .page-about .about-idea__quote {
    padding-left: var(--space-5);
  }
  .page-about .about-rights__visual img {
    max-height: 380px;
  }
  .page-about .about-rights__panels {
    padding-top: var(--space-5);
  }
  .page-about .about-rights__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-timeline__list::before {
    left: 5px;
  }
  .page-about .about-timeline__item {
    padding-left: 48px;
    padding-bottom: var(--space-6);
    max-width: 74ch;
  }
  .page-about .about-lines__item {
    grid-template-columns: 88px 1fr;
    padding: var(--space-5) 0;
  }
  .page-about .about-region__grid {
    grid-template-columns: 8fr 5fr;
    gap: var(--space-6);
    align-items: start;
  }
  .page-about .about-region__cta .btn {
    width: auto;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__inner {
    grid-template-columns: 7fr 5fr;
  }
  .page-about .about-lines__item {
    grid-template-columns: 108px 1fr;
  }
}
<<<END>>>