/* ===== 页面专属样式：about ===== */
.page-about {
  position: relative;
  max-width: 100%;
  overflow-x: hidden;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
}

.page-about .about-hero {
  padding: clamp(2.5rem, 7vw, 5.5rem) var(--gutter) clamp(1.5rem, 4vw, 3rem);
  position: relative;
}

.page-about .about-hero__kicker {
  font-family: var(--font-display);
  font-size: 0.875rem;
  letter-spacing: 0.22em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin: 0 0 0.8rem;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.05;
  margin: 0 0 1rem;
  text-transform: uppercase;
}

.page-about .about-hero__desc {
  color: var(--color-muted);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 34rem;
  margin: 0 0 1.5rem;
}

.page-about .about-hero .btn {
  margin-top: 0.5rem;
}

.page-about .about-hero__visual {
  margin: 0 var(--gutter) clamp(2rem, 5vw, 4rem);
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 74vh;
  object-fit: cover;
  border: 3px solid var(--color-silver);
  box-shadow: var(--shadow-strong);
}

.page-about .about-section {
  padding: clamp(3rem, 7vw, 6rem) var(--gutter);
  position: relative;
}

.page-about .about-section__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem;
  border-left: 6px solid var(--color-accent);
  padding-left: 1rem;
  margin-bottom: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-section__index {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1;
  color: var(--color-bg);
  background: var(--color-accent);
  padding: 0.2rem 0.7rem 0.2rem 0.6rem;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 100%, 8px 100%);
}

.page-about .about-section__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.1;
  margin: 0;
}

.page-about .about-section__eng {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  color: var(--color-silver);
  opacity: 0.7;
  text-transform: uppercase;
}

/* ---------- 品牌缘起 ---------- */
.page-about .about-origin__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-timeline {
  position: relative;
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0;
  scroll-behavior: smooth;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4%;
  right: 4%;
  bottom: 7px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-neon), var(--color-accent));
}

.page-about .about-timeline__entry {
  position: relative;
  flex: 0 0 auto;
  padding-bottom: 20px;
  min-width: 44px;
  text-align: center;
}

.page-about .about-timeline__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
}

.page-about .about-timeline__link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

.page-about .about-timeline__year {
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: 1.2;
  color: var(--color-text);
  transition: color var(--dur-fast) var(--ease-out);
}

.page-about .about-timeline__node {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-neon);
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 3px var(--color-neon), 0 0 14px rgba(57, 255, 20, 0.5);
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}

.page-about .about-timeline__entry:hover .about-timeline__year,
.page-about .about-timeline__entry:focus-within .about-timeline__year {
  color: var(--color-accent);
}

.page-about .about-timeline__entry:hover .about-timeline__node,
.page-about .about-timeline__entry:focus-within .about-timeline__node {
  transform: translateX(-50%) scale(1.25);
  box-shadow: 0 0 0 5px rgba(57, 255, 20, 0.2), 0 0 22px rgba(57, 255, 20, 0.75);
}

.page-about .about-story {
  display: grid;
  gap: 1.2rem;
}

.page-about .about-story__block {
  position: relative;
  background: var(--color-bg-card);
  border: 3px solid var(--color-silver);
  box-shadow: var(--shadow-card);
  padding: 1.5rem;
  scroll-margin-top: 88px;
  transition: border-color var(--dur-base) var(--ease-out);
}

.page-about .about-story__block:hover {
  border-color: var(--color-accent);
}

.page-about .about-story__year {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  line-height: 1;
  color: var(--color-accent);
  margin-bottom: 0.6rem;
}

.page-about .about-story__block h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  line-height: 1.2;
  margin: 0 0 0.75rem;
}

.page-about .about-story__block p {
  color: var(--color-muted);
  line-height: 1.8;
  margin: 0 0 1rem;
}

.page-about .about-story__pulse {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--color-neon);
  border: 1px solid rgba(57, 255, 20, 0.4);
  background: rgba(57, 255, 20, 0.08);
  padding: 0.3rem 0.6rem;
}

.page-about .about-origin__figure {
  margin: clamp(1.5rem, 4vw, 3rem) 0 0;
  background: var(--color-bg-card);
  border: 3px solid var(--color-silver);
  box-shadow: var(--shadow-card);
}

.page-about .about-origin__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-bottom: 3px solid var(--color-silver-dim);
}

.page-about .about-origin__figure figcaption {
  padding: 0.8rem 1rem;
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* ---------- 数据历程 ---------- */
.page-about .about-metrics {
  background:
    linear-gradient(135deg, rgba(255, 107, 0, 0.07) 0%, rgba(10, 31, 68, 0) 40%),
    var(--color-bg-deep);
  border-top: 3px solid var(--color-silver-dim);
  border-bottom: 3px solid var(--color-silver-dim);
}

.page-about .about-metrics__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-metric {
  background: var(--color-bg-card);
  border: 3px solid var(--color-silver);
  box-shadow: var(--shadow-card);
  padding: 1.5rem 1rem;
  text-align: center;
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}

.page-about .about-metric:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}

.page-about .about-metric__value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
  color: var(--color-accent);
}

.page-about .about-metric__label {
  display: block;
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-top: 0.4rem;
}

.page-about .about-metrics__bars {
  display: grid;
  gap: 1.4rem;
}

.page-about .about-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.5rem 1rem;
}

.page-about .about-bar__label {
  grid-column: 1 / -1;
  font-size: 0.9rem;
  color: var(--color-text);
}

.page-about .about-bar__track {
  display: block;
  height: 8px;
  background: rgba(192, 192, 192, 0.16);
  border: 1px solid var(--color-silver-dim);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--color-neon), var(--color-accent));
}

.page-about .about-bar__num {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--color-accent);
}

/* ---------- 团队构成 ---------- */
.page-about .about-team__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-team__copy {
  display: grid;
  gap: 1.2rem;
}

.page-about .about-team__unit {
  background: var(--color-bg-card);
  border-left: 6px solid var(--color-accent);
  box-shadow: var(--shadow-card);
  padding: 1.5rem;
}

.page-about .about-team__unit h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  line-height: 1.2;
  margin: 0 0 0.75rem;
}

.page-about .about-team__unit p {
  color: var(--color-muted);
  line-height: 1.8;
  margin: 0;
}

.page-about .about-team__figure {
  margin: 0;
  background: var(--color-bg-card);
  border: 3px solid var(--color-silver);
  box-shadow: var(--shadow-card);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-bottom: 3px solid var(--color-silver-dim);
}

.page-about .about-team__figure figcaption {
  padding: 0.8rem 1rem;
  font-size: 0.875rem;
  color: var(--color-muted);
}

.page-about .about-team__process {
  list-style: none;
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem;
}

.page-about .about-team__process li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  background: rgba(255, 107, 0, 0.08);
  border: 1px solid rgba(255, 107, 0, 0.4);
  padding: 0.9rem 1rem;
  font-size: 0.9rem;
  line-height: 1.4;
}

.page-about .about-team__process li span {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--color-accent);
  flex-shrink: 0;
}

/* ---------- 服务生态 ---------- */
.page-about .about-eco {
  border-top: 3px solid var(--color-silver-dim);
  background:
    radial-gradient(ellipse at 20% 20%, rgba(255, 107, 0, 0.1) 0%, rgba(10, 31, 68, 0) 60%),
    var(--color-bg);
}

.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-eco__card {
  background: var(--color-bg-card);
  border: 3px solid var(--color-silver);
  box-shadow: var(--shadow-card);
  padding: 1.5rem;
  transition: border-color var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}

.page-about .about-eco__card:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
}

.page-about .about-eco__card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  line-height: 1.2;
  margin: 0 0 0.5rem;
  color: var(--color-accent);
}

.page-about .about-eco__card p {
  color: var(--color-muted);
  line-height: 1.8;
  margin: 0;
}

.page-about .about-eco__links {
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.9rem;
}

/* ---------- 桌面端布局 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    grid-template-rows: auto auto auto;
    align-items: end;
    gap: 0.5rem 2rem;
  }

  .page-about .about-hero__kicker {
    grid-column: 1;
    grid-row: 1;
    margin-bottom: 0;
  }

  .page-about .about-hero__title {
    grid-column: 1;
    grid-row: 2;
  }

  .page-about .about-hero__desc {
    grid-column: 2;
    grid-row: 1 / span 2;
    justify-self: end;
    align-self: end;
    max-width: 25rem;
    margin: 0 0 0.5rem;
    padding-left: 1.5rem;
    border-left: 3px solid var(--color-accent);
  }

  .page-about .about-hero .btn {
    grid-column: 2;
    grid-row: 3;
    justify-self: start;
    margin-top: 0;
  }

  .page-about .about-section__head {
    border-left-width: 8px;
    gap: 1rem;
  }

  /* 时间轴垂直布局 */
  .page-about .about-origin__layout {
    grid-template-columns: 200px 1fr;
    gap: clamp(2rem, 5vw, 5rem);
  }

  .page-about .about-timeline {
    flex-direction: column;
    justify-content: flex-start;
    gap: 0;
    overflow: visible;
  }

  .page-about .about-timeline::before {
    left: 6px;
    right: auto;
    top: 0;
    bottom: 0;
    width: 2px;
    height: auto;
    background: linear-gradient(180deg, var(--color-neon), var(--color-accent));
  }

  .page-about .about-timeline__entry {
    margin-bottom: 1.6rem;
    padding-bottom: 0;
    text-align: left;
  }

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

  .page-about .about-timeline__link {
    flex-direction: row;
    align-items: center;
    gap: 0.8rem;
  }

  .page-about .about-timeline__year {
    font-size: 1.5rem;
    color: var(--color-muted);
  }

  .page-about .about-timeline__node {
    position: absolute;
    top: 50%;
    bottom: auto;
    left: 0;
    transform: translateY(-50%);
  }

  .page-about .about-timeline__entry:hover .about-timeline__node,
  .page-about .about-timeline__entry:focus-within .about-timeline__node {
    transform: translateY(-50%) scale(1.25);
  }

  .page-about .about-story {
    gap: 1.5rem;
  }

  .page-about .about-story__block {
    padding: 1.8rem;
  }

  .page-about .about-origin__figure {
    margin-left: calc(200px + clamp(2rem, 5vw, 5rem));
  }

  .page-about .about-metrics__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }

  .page-about .about-metrics__bars {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }

  .page-about .about-team__layout {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .page-about .about-team__process {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-eco__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .page-about .about-eco__links {
    justify-content: flex-start;
  }
}