.page-about {
  --about-space: clamp(28px, 4vw, 52px);
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: 20px;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .breadcrumb__list a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .breadcrumb__list a:hover,
.page-about .breadcrumb__list a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about .breadcrumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-soft);
}

.page-about .breadcrumb__current {
  color: var(--white);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(22px, 4vw, 46px);
  padding-bottom: clamp(20px, 3vw, 40px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-hero .kicker {
  margin: 0 0 12px;
  color: var(--orange);
  letter-spacing: 0.2em;
}

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.6rem, 8.6vw, 6.2rem);
  line-height: 0.92;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--white);
}

.page-about .about-hero__mark {
  display: inline-block;
  position: relative;
  z-index: 0;
  color: var(--lime);
  padding: 0 0.1em;
}

.page-about .about-hero__mark::before {
  content: "";
  position: absolute;
  left: -0.05em;
  right: -0.08em;
  top: 0.12em;
  bottom: 0.06em;
  background: rgba(198, 255, 61, 0.12);
  border-left: 4px solid var(--lime);
  transform: skewX(-9deg);
  z-index: -1;
}

.page-about .about-hero__text {
  font-size: clamp(0.98rem, 2.2vw, 1.1rem);
  line-height: 1.78;
  color: rgba(244, 247, 245, 0.84);
  margin: 0 0 18px;
  max-width: 46ch;
}

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

.page-about .about-hero__bar {
  margin-top: clamp(24px, 4vw, 42px);
  height: 6px;
  background: linear-gradient(90deg, var(--lime) 0%, var(--lime) 38%, var(--orange) 38%, var(--orange) 100%);
  clip-path: polygon(0 0, 100% 0, calc(100% - 30px) 100%, 0 100%);
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
    gap: 56px;
    align-items: end;
  }
}

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  padding-bottom: clamp(52px, 8vw, 104px);
}

.page-about .about-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
}

@media (min-width: 1024px) {
  .page-about .about-cols {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 64px;
    align-items: start;
  }
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding: var(--about-space) 0;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-section .label {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
  border-left: 3px solid var(--orange);
  padding-left: 10px;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.page-about .about-section.is-current .label {
  color: var(--lime);
  border-left-color: var(--lime);
}

.page-about .about-h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.55rem, 4vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 12px 0 0;
  color: var(--white);
}

/* ---------- 图片 ---------- */
.page-about .about-media {
  margin: clamp(20px, 3vw, 30px) 0 0;
  position: relative;
  background: var(--carbon);
  border: 1px solid var(--line-soft);
  box-shadow: 5px 5px 0 rgba(198, 255, 61, 0.16);
}

.page-about .about-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.page-about .about-media .media__caption {
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--mist);
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
}

/* ---------- 正文 ---------- */
.page-about .prose {
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .prose p {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(244, 247, 245, 0.82);
  margin: 0 0 15px;
  max-width: 68ch;
}

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

.page-about .prose a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, 0.45);
  transition: border-color 0.2s ease;
}

.page-about .prose a:hover,
.page-about .prose a:focus-visible {
  border-bottom-color: var(--lime);
}

/* ---------- 强调块 ---------- */
.page-about .about-callout {
  margin-top: 24px;
  padding: 18px 20px;
  background: var(--teal);
  border: 1px solid var(--line-teal);
  border-left: 5px solid var(--lime);
  box-shadow: 5px 5px 0 rgba(11, 31, 26, 0.8);
}

.page-about .about-callout p {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--white);
  max-width: 62ch;
}

/* ---------- 数据格 ---------- */
.page-about .about-figures {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-figures__item {
  background: var(--carbon);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-figures__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 4.2vw, 2.1rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-figures__suffix {
  font-size: 0.55em;
  margin-left: 2px;
  color: var(--orange);
}

.page-about .about-figures__label {
  font-size: 12px;
  line-height: 1.55;
  letter-spacing: 0.05em;
  color: var(--mist);
}

@media (min-width: 700px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 垂直时间轴 ---------- */
.page-about .about-road {
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 0 24px;
  position: relative;
}

.page-about .about-road::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime) 0%, var(--orange) 100%);
  opacity: 0.55;
}

.page-about .about-road__item {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .about-road__node {
  position: absolute;
  left: -24px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--carbon);
  border: 2px solid var(--mist);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-road__item:hover .about-road__node,
.page-about .about-road__item.is-visible .about-road__node {
  background: var(--lime);
  border-color: var(--lime);
  transform: scale(1.2);
}

.page-about .about-road__era {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange);
  margin: 0 0 6px;
}

.page-about .about-road__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.05rem, 2.6vw, 1.3rem);
  line-height: 1.25;
  letter-spacing: 0;
  margin: 0 0 6px;
  color: var(--white);
  transition: color 0.25s ease;
}

.page-about .about-road__item:hover .about-road__title {
  color: var(--lime);
}

.page-about .about-road__text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: rgba(244, 247, 245, 0.74);
  max-width: 62ch;
}

/* ---------- 联系方式表 ---------- */
.page-about .about-contact {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-contact__item {
  background: var(--carbon);
  padding: 16px;
  display: grid;
  gap: 6px;
}

.page-about .about-contact__key {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-contact__value {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}

.page-about .about-contact__value.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.page-about .about-contact__note {
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

@media (min-width: 640px) {
  .page-about .about-contact__item {
    grid-template-columns: 108px minmax(0, 1fr);
    align-items: baseline;
    gap: 6px 18px;
    padding: 18px 20px;
  }

  .page-about .about-contact__note {
    grid-column: 2;
  }
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  margin-top: clamp(30px, 5vw, 52px);
  padding: clamp(22px, 4vw, 36px);
  background: var(--teal);
  border: 2px solid var(--line-teal);
  border-left: 6px solid var(--orange);
  box-shadow: 6px 6px 0 rgba(11, 31, 26, 0.85);
}

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

.page-about .about-cta__text {
  margin: 14px 0 0;
  font-size: 0.98rem;
  line-height: 1.75;
  color: rgba(244, 247, 245, 0.82);
  max-width: 62ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 侧边品牌数据卡 ---------- */
.page-about .about-side {
  position: relative;
}

.page-about .brand-card {
  background: var(--carbon);
  border: 2px solid var(--line-teal);
  border-top: 4px solid var(--lime);
  box-shadow: 6px 6px 0 rgba(198, 255, 61, 0.2);
  padding: 20px;
}

.page-about .brand-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .brand-card__head .label {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-about .brand-card__pulse {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--lime);
  animation: aboutPulse 2.4s ease-out infinite;
}

@keyframes aboutPulse {
  0% { box-shadow: 0 0 0 0 rgba(198, 255, 61, 0.5); }
  70% { box-shadow: 0 0 0 12px rgba(198, 255, 61, 0); }
  100% { box-shadow: 0 0 0 0 rgba(198, 255, 61, 0); }
}

.page-about .brand-card__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .brand-card__item {
  display: grid;
  grid-template-columns: minmax(64px, auto) minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.page-about .brand-card__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.35rem;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .brand-card__unit {
  font-size: 0.6em;
  margin-left: 2px;
  color: var(--orange);
}

.page-about .brand-card__desc {
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

.page-about .brand-card__cta {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed var(--line-soft);
  display: grid;
  gap: 10px;
}

.page-about .brand-card__cta .btn {
  width: 100%;
  text-align: center;
}

.page-about .brand-card__link {
  display: block;
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  text-decoration: none;
  padding: 10px;
  border: 1px solid var(--line-soft);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .brand-card__link:hover,
.page-about .brand-card__link:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
}

@media (min-width: 1024px) {
  .page-about .about-side {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

/* ---------- 入场动效 ---------- */
@media (prefers-reduced-motion: no-preference) {
  .page-about [data-reveal] {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.55s ease, transform 0.55s ease;
  }

  .page-about [data-reveal].is-visible {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .brand-card__pulse {
    animation: none;
  }
}

/* ---------- 窄屏收束 ---------- */
@media (max-width: 420px) {
  .page-about .about-hero__bar {
    clip-path: none;
  }

  .page-about .about-figures {
    grid-template-columns: 1fr;
  }

  .page-about .brand-card__item {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}