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

.page-about .page-rule {
  max-width: var(--content-w);
  margin-inline: auto;
  padding: 18px 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.page-about .page-rule__note {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray);
}

/* ===== 首屏：左右分屏 ===== */
.page-about .about-hero {
  background: var(--navy);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  right: -90px;
  top: -90px;
  border: 1px solid rgba(244, 237, 228, 0.18);
  border-radius: 50%;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 24px;
  max-width: var(--content-w);
  margin-inline: auto;
  padding: 36px 20px 44px;
}

.page-about .about-hero__copy {
  max-width: 640px;
}

.page-about .about-hero__kicker {
  margin: 0 0 16px;
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--yellow);
  font-weight: 600;
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-size: clamp(26px, 5vw, 44px);
  line-height: 1.22;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: rgba(244, 237, 228, 0.82);
}

.page-about .about-hero__metric {
  margin-top: 28px;
  border-top: 1px solid rgba(244, 237, 228, 0.22);
  border-bottom: 1px solid rgba(244, 237, 228, 0.22);
  padding: 18px 0;
  gap: 20px;
}

.page-about .about-hero__metric .metric-item {
  display: grid;
  gap: 4px;
}

.page-about .about-hero__metric .metric-item__num {
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 700;
  color: var(--yellow);
  line-height: 1;
  display: inline-block;
  transition: transform 0.2s ease;
}

.page-about .about-hero__metric .metric-item:hover .metric-item__num {
  transform: scale(1.05);
}

.page-about .about-hero__metric .metric-item__label {
  font-size: 12px;
  color: rgba(244, 237, 228, 0.66);
}

.page-about .about-hero__actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__ghost {
  display: inline-flex;
  align-items: center;
  padding: 12px 20px;
  border: 1px solid rgba(244, 237, 228, 0.46);
  color: var(--paper);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.page-about .about-hero__ghost:hover {
  border-color: var(--orange);
  background: rgba(228, 69, 43, 0.16);
  color: #fff;
}

.page-about .about-hero__solid {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: var(--orange);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-hero__solid:hover {
  background: #c93a24;
  transform: translateY(-2px);
}

.page-about .about-hero__arrow {
  font-size: 18px;
  line-height: 1;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: 320px;
  object-fit: cover;
  object-position: center;
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 0 100%);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--orange);
  opacity: 0.12;
  mix-blend-mode: multiply;
  pointer-events: none;
}

.page-about .about-hero__caption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 1;
  background: var(--ink);
  color: var(--paper);
  font-size: 12px;
  padding: 6px 12px;
  letter-spacing: 0.08em;
}

/* ===== 品牌起源 ===== */
.page-about .about-story {
  position: relative;
  display: grid;
  gap: 28px;
  max-width: var(--content-w);
  margin-inline: auto;
  padding: 64px 20px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-story__main {
  max-width: 760px;
}

.page-about .about-story__title {
  margin-bottom: 24px;
}

.page-about .about-story__main p {
  font-size: 16px;
  line-height: 1.85;
  color: #333;
  margin: 0 0 20px;
}

.page-about .about-story__dropcap::first-letter {
  font-family: var(--font-serif);
  font-size: 3.2em;
  line-height: 1;
  float: left;
  margin: 0.08em 0.12em 0 0;
  font-weight: 700;
  color: var(--orange);
}

.page-about .about-story__figure {
  margin: 32px 0;
  position: relative;
  border: 1px solid var(--line);
  padding: 10px;
  background: var(--paper);
  box-shadow: 0 6px 24px rgba(26, 26, 26, 0.06);
}

.page-about .about-story__figure img {
  display: block;
  width: 100%;
  height: auto;
}

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

/* ===== 发展历程 ===== */
.page-about .about-milestones {
  background: var(--paper-cool);
  padding: 64px 20px;
}

.page-about .about-milestones__intro {
  max-width: var(--content-w);
  margin: 0 auto 36px;
}

.page-about .about-milestones__title {
  margin-bottom: 10px;
}

.page-about .about-milestones__lead {
  margin: 0;
  font-size: 16px;
  color: var(--gray);
  line-height: 1.7;
  max-width: 620px;
}

.page-about .about-milestones__layout {
  display: grid;
  gap: 32px;
  max-width: var(--content-w);
  margin-inline: auto;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: var(--line);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 34px;
  padding-bottom: 28px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--paper-cool);
  border: 3px solid var(--orange);
  box-sizing: border-box;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-timeline__item:hover::before {
  background: var(--orange);
  transform: scale(1.1);
}

.page-about .about-timeline__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 10px;
}

.page-about .about-timeline__period {
  font-family: var(--font-num);
  font-size: 21px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.02em;
}

.page-about .about-timeline__body {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 18px 20px;
  position: relative;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.page-about .about-timeline__item:hover .about-timeline__body {
  border-color: var(--orange);
  box-shadow: 4px 4px 0 rgba(228, 69, 43, 0.14);
}

.page-about .about-timeline__body h3 {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--ink);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--gray);
}

.page-about .about-milestones__side {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-milestones__figure {
  margin: 0;
  background: var(--navy);
  padding: 10px;
}

.page-about .about-milestones__figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-milestones__facts {
  display: grid;
  gap: 10px;
}

.page-about .about-milestones__badge {
  border-left: 4px solid var(--yi-red);
  padding: 14px 16px;
  background: var(--paper);
}

.page-about .about-milestones__badge-num {
  display: block;
  font-family: var(--font-num);
  font-size: 21px;
  font-weight: 700;
  color: var(--navy);
}

.page-about .about-milestones__badge-label {
  display: block;
  color: var(--gray);
  font-size: 13px;
  line-height: 1.6;
  margin-top: 4px;
}

/* ===== 价值观 ===== */
.page-about .about-values {
  background: var(--ink);
  color: var(--paper);
  padding: 64px 20px;
}

.page-about .about-values__intro {
  max-width: var(--content-w);
  margin: 0 auto 36px;
}

.page-about .about-values .about-values__intro .section-kicker {
  color: var(--yellow);
}

.page-about .about-values__intro .section-title {
  color: var(--paper);
}

.page-about .about-values__lead {
  margin: 0;
  font-size: 16px;
  color: rgba(244, 237, 228, 0.72);
  max-width: 620px;
}

.page-about .about-values__grid {
  display: grid;
  gap: 16px;
  max-width: var(--content-w);
  margin: 0 auto;
}

.page-about .about-values__card {
  background: rgba(244, 237, 228, 0.05);
  border: 1px solid rgba(244, 237, 228, 0.14);
  padding: 24px 22px;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-values__card:hover {
  background: rgba(228, 69, 43, 0.16);
  border-color: var(--orange);
}

.page-about .about-values__num {
  display: block;
  font-family: var(--font-num);
  font-size: 44px;
  line-height: 1;
  color: var(--orange);
  opacity: 0.85;
}

.page-about .about-values__card h3 {
  margin: 18px 0 8px;
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--yellow);
}

.page-about .about-values__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(244, 237, 228, 0.78);
}

/* ===== 本地化服务 ===== */
.page-about .about-local {
  display: grid;
  gap: 28px;
  max-width: var(--content-w);
  margin-inline: auto;
  padding: 64px 20px;
  border-top: 4px solid var(--yi-red);
}

.page-about .about-local__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: #333;
  max-width: 560px;
}

.page-about .about-local__list {
  list-style: none;
  margin: 24px 0 28px;
  padding: 0;
  display: grid;
  gap: 12px;
  max-width: 560px;
}

.page-about .about-local__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: #333;
}

.page-about .about-local__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 2px;
  background: var(--yi-red);
}

.page-about .about-local__action {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: var(--bai-blue);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-local__action:hover {
  background: #23415b;
  transform: translateY(-2px);
}

.page-about .about-local__visual {
  display: grid;
  place-items: center;
  align-content: center;
  background: var(--bai-blue);
  color: var(--paper);
  padding: 28px 20px;
}

.page-about .about-local__map {
  width: 100%;
  max-width: 340px;
  height: auto;
  display: block;
}

.page-about .about-local__map .about-map__base {
  fill: rgba(244, 237, 228, 0.05);
  stroke: rgba(244, 237, 228, 0.55);
  stroke-width: 1;
}

.page-about .about-local__map .about-map__line {
  fill: none;
  stroke: rgba(244, 237, 228, 0.55);
  stroke-width: 1.2;
  stroke-dasharray: 4 3;
}

.page-about .about-local__map .about-map__node {
  fill: var(--yellow);
  stroke: var(--paper);
  stroke-width: 2;
  transition: fill 0.2s ease, transform 0.2s ease;
}

@media (hover: hover) {
  .page-about .about-local__visual:hover .about-map__node {
    fill: var(--orange);
    transform: scale(1.25);
    transform-origin: center;
  }
}

.page-about .about-local__map-note {
  margin: 14px 0 0;
  font-size: 12px;
  color: rgba(244, 237, 228, 0.72);
  text-align: center;
}

/* ===== 收尾宽幅 ===== */
.page-about .about-closing {
  position: relative;
  min-height: 360px;
  display: grid;
  align-items: end;
  overflow: hidden;
}

.page-about .about-closing img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-about .about-closing::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(175deg, rgba(22, 50, 74, 0.16) 0%, rgba(22, 50, 74, 0.88) 100%);
}

.page-about .about-closing__panel {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 36px 20px 44px;
  color: var(--paper);
}

.page-about .about-closing__kicker {
  color: var(--yellow);
}

.page-about .about-closing__title {
  color: var(--paper);
  margin-bottom: 12px;
}

.page-about .about-closing__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 237, 228, 0.86);
  max-width: 620px;
}

.page-about .about-closing__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-closing__links a {
  padding: 10px 16px;
  border: 1px solid rgba(244, 237, 228, 0.42);
  color: var(--paper);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.page-about .about-closing__links a:hover {
  background: var(--orange);
  border-color: var(--orange);
  color: #fff;
}

.page-about .about-trust {
  margin: 0;
  padding: 18px 20px;
  background: var(--navy);
  color: rgba(244, 237, 228, 0.68);
  font-size: 13px;
  text-align: center;
  border-top: 1px solid rgba(244, 237, 228, 0.1);
}

/* ===== 响应式设计 ===== */
@media (min-width: 680px) {
  .page-about .about-hero__figure img {
    height: 420px;
  }

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

  .page-about .about-closing {
    min-height: 420px;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: stretch;
    gap: 40px;
    padding: 64px 20px 72px;
  }

  .page-about .about-hero__figure img {
    height: 100%;
    min-height: 600px;
    max-height: 760px;
  }

  .page-about .about-hero__figure::after {
    inset: 0;
  }

  .page-about .about-story {
    grid-template-columns: minmax(0, 1fr) 170px;
    gap: 40px;
    padding: 88px 20px;
  }

  .page-about .about-story__rail {
    display: flex;
    justify-content: flex-end;
    align-items: stretch;
    gap: 16px;
    position: sticky;
    top: 90px;
    align-self: start;
  }

  .page-about .about-story__vertical {
    writing-mode: vertical-rl;
    font-family: var(--font-serif);
    font-size: 14px;
    letter-spacing: 0.42em;
    color: var(--yi-red);
    border-left: 1px solid var(--line);
    padding-left: 14px;
    font-weight: 600;
  }

  .page-about .about-story__pattern {
    width: 90px;
    height: auto;
    align-self: center;
  }

  .page-about .about-story__contour {
    fill: none;
    stroke: var(--bai-blue);
    stroke-width: 1.4;
    stroke-dasharray: 4 3;
    opacity: 0.7;
  }

  .page-about .about-story__terrain {
    fill: var(--yi-red);
    opacity: 0.08;
  }

  .page-about .about-story__signal {
    fill: var(--orange);
  }

  .page-about .about-story__figure {
    margin-right: -40px;
  }

  .page-about .about-milestones {
    padding: 88px 20px;
  }

  .page-about .about-milestones__layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 48px;
  }

  .page-about .about-milestones__side {
    position: sticky;
    top: 84px;
  }

  .page-about .about-values {
    padding: 88px 20px;
  }

  .page-about .about-values__card:nth-child(even) {
    transform: translateY(24px);
  }

  .page-about .about-values__grid {
    padding-bottom: 24px;
  }

  .page-about .about-local {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
    padding: 88px 20px;
  }

  .page-about .about-local__visual {
    padding: 40px 28px;
  }

  .page-about .about-closing {
    min-height: 520px;
  }

  .page-about .about-closing__panel {
    padding: 56px 20px 64px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__inner {
    gap: 56px;
  }

  .page-about .about-hero__title {
    font-size: 48px;
  }

  .page-about .about-story__main p {
    font-size: 17px;
  }
}