.page-about {
  --story-bg-gradient: linear-gradient(145deg, var(--bg-primary) 0%, var(--bg-secondary) 54%, var(--bg-dark) 100%);
  --story-line: rgba(196, 255, 0, 0.28);
  --story-card-glow: rgba(255, 107, 53, 0.12);
  --story-text-dim: #AAB3C8;
  --story-chapter-indent: 460px;
  background: var(--story-bg-gradient);
  color: var(--text-light);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .container {
  width: min(var(--container-w), calc(100% - 40px));
  margin-inline: auto;
}

/* ===== 第一章：品牌使命 ===== */
.page-about .story-chapter {
  padding: clamp(3rem, 8vw, 6rem) 0;
}

.page-about .story-chapter__header {
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}

.page-about .story-chapter__index {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 5rem);
  line-height: 1;
  color: var(--accent-green);
  opacity: 0.9;
  letter-spacing: 0.02em;
  writing-mode: horizontal-tb;
}

.page-about .story-chapter__index--alt {
  color: var(--accent-orange);
}

.page-about .story-chapter__title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.5vw, 3.2rem);
  letter-spacing: 0.03em;
  margin: 0.55em 0 0.35em;
  text-transform: uppercase;
  position: relative;
}

.page-about .story-chapter__title--alt {
  color: var(--text-light);
}

.page-about .story-chapter__desc {
  max-width: 720px;
  font-size: clamp(0.95rem, 1.6vw, 1.1rem);
  line-height: 1.8;
  color: var(--story-text-dim);
}

.page-about .story-mission__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  counter-reset: mission;
}

.page-about .story-mission__item {
  background: rgba(26, 26, 46, 0.78);
  border-left: 3px solid var(--line-color);
  padding: 1.75rem 1.5rem;
  position: relative;
  transition: border-color 0.3s ease, background-color 0.3s ease;
}

.page-about .story-mission__item:hover {
  border-left-color: var(--accent-green);
  background-color: rgba(26, 26, 46, 0.94);
}

.page-about .story-mission__number {
  position: absolute;
  top: 0.75rem;
  right: 1rem;
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--bg-primary);
  text-shadow: 0 0 0.8px rgba(196, 255, 0, 0.5);
  opacity: 0.18;
  line-height: 1;
}

.page-about .story-mission__heading {
  font-family: var(--font-serif);
  font-size: 1.22rem;
  font-weight: 700;
  margin: 0 0 0.55em;
  color: var(--text-light);
}

.page-about .story-mission__text {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--story-text-dim);
  margin: 0;
}

/* ===== 第二章：发展里程碑 ===== */
.page-about .story-milestone {
  padding: clamp(3rem, 8vw, 6rem) 0;
  background: rgba(20, 20, 36, 0.42);
  position: relative;
}

.page-about .story-milestone::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--line-color) 25%, var(--line-color) 75%, transparent);
}

.page-about .story-milestone__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

.page-about .story-milestone__sidebar {
  position: relative;
}

.page-about .story-milestone__intro {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-light);
  margin: 0 0 1.5rem;
  max-width: 380px;
}

.page-about .story-milestone__img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-color);
  border-radius: var(--radius);
  max-width: 100%;
}

.page-about .story-milestone__timeline {
  position: relative;
  display: grid;
  gap: 1.5rem;
  padding-left: 0;
}

.page-about .story-milestone__timeline::before {
  content: none;
}

.page-about .story-milestone__item {
  position: relative;
  border-top: 1px solid var(--line-color);
  padding-top: 1.25rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
}

.page-about .story-milestone__year {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--accent-green);
  letter-spacing: 0.06em;
}

.page-about .story-milestone__card {
  background: rgba(31, 42, 68, 0.68);
  padding: 1.25rem 1.25rem 1.4rem;
  border-left: 2px solid var(--line-color);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}

.page-about .story-milestone__card:hover {
  transform: translateX(6px);
  border-left-color: var(--accent-orange);
  box-shadow: 0 8px 30px var(--story-card-glow);
}

.page-about .story-milestone__heading {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 0.5em;
  color: var(--text-light);
}

.page-about .story-milestone__text {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--story-text-dim);
  margin: 0;
}

/* ===== 第三章：数据服务能力 ===== */
.page-about .story-capability {
  padding: clamp(3rem, 8vw, 6rem) 0;
}

.page-about .story-capability__header {
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}

.page-about .story-capability__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-about .story-capability__item {
  background: linear-gradient(150deg, rgba(31, 42, 68, 0.9), rgba(26, 26, 46, 0.72));
  border: 1px solid var(--line-color);
  padding: 1.75rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.page-about .story-capability__item::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 48px;
  height: 48px;
  background: var(--accent-green);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  opacity: 0.07;
}

.page-about .story-capability__number {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--bg-dark);
  background: var(--accent-purple);
  padding: 0.3em 0.7em 0.2em;
  margin-bottom: 1em;
  border-radius: 0;
  line-height: 1;
}

.page-about .story-capability__heading {
  font-family: var(--font-display);
  font-size: 1.55rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin: 0 0 0.9em;
  color: var(--text-light);
}

.page-about .story-capability__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.page-about .story-capability__list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-light);
}

.page-about .story-capability__list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--accent-orange);
  font-family: var(--font-mono);
}

.page-about .story-capability__list li:nth-child(even)::before {
  color: var(--accent-green);
}

/* ===== 第四章：团队 ===== */
.page-about .story-team {
  padding: clamp(3rem, 8vw, 6rem) 0;
  background: rgba(20, 20, 36, 0.48);
  position: relative;
}

.page-about .story-team::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 38%;
  height: 100%;
  background: var(--bg-primary);
  clip-path: polygon(8% 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.1;
  pointer-events: none;
}

.page-about .story-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.page-about .story-team__img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-color);
  border-radius: var(--radius);
  max-width: 100%;
}

.page-about .story-team__content {
  position: relative;
}

.page-about .story-team__text {
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--story-text-dim);
  margin: 0 0 1.1em;
  max-width: 620px;
}

.page-about .story-team__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
  border-top: 1px solid var(--line-color);
  padding-top: 1.5rem;
  max-width: 620px;
}

.page-about .story-team__stat {
  background: rgba(26, 26, 46, 0.62);
  padding: 1.1rem 1.2rem;
  border-left: 2px solid var(--accent-green);
}

.page-about .story-team__stat:nth-child(even) {
  border-left-color: var(--accent-orange);
}

.page-about .story-team__stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-green);
  line-height: 1.15;
}

.page-about .story-team__stat:nth-child(even) .story-team__stat-value {
  color: var(--accent-orange);
}

.page-about .story-team__stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--story-text-dim);
  margin-top: 0.3em;
}

/* ===== 第五章：行业认可 ===== */
.page-about .story-honor {
  padding: clamp(3rem, 8vw, 6rem) 0;
}

.page-about .story-honor__header {
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}

.page-about .story-honor__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-about .story-honor__item {
  background: rgba(58, 46, 93, 0.2);
  border-top: 2px solid var(--accent-purple);
  padding: 2rem 1.75rem;
  position: relative;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

.page-about .story-honor__item:hover {
  background: rgba(58, 46, 93, 0.38);
  transform: translateY(-4px);
}

.page-about .story-honor__award {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-light);
}

.page-about .story-honor__count {
  display: inline-block;
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--accent-green);
  line-height: 1;
}

.page-about .story-honor__count::after {
  content: "";
  display: block;
  width: 42px;
  height: 3px;
  margin-top: 0.65rem;
  background: var(--accent-orange);
}

.page-about .story-honor__text {
  margin: 1.2rem 0 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--story-text-dim);
}

/* ===== 第六章：品牌问答 ===== */
.page-about .story-faq {
  padding: clamp(3rem, 8vw, 6rem) 0;
  background: linear-gradient(to bottom, rgba(20, 20, 36, 0.72), var(--bg-dark));
}

.page-about .story-faq__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

.page-about .story-faq__img {
  width: 200px;
  height: auto;
  max-width: 100%;
  border-radius: 0;
  border: 1px solid var(--line-color);
  padding: 8px;
  background: rgba(26, 26, 46, 0.6);
}

.page-about .story-faq__title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 0 0 1.5rem;
  color: var(--text-light);
}

.page-about .story-faq__list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.page-about .story-faq__item {
  background: rgba(31, 42, 68, 0.66);
  border-left: 2px solid var(--line-color);
  padding: 1.25rem 1.35rem;
  transition: border-color 0.3s ease;
}

.page-about .story-faq__item:hover {
  border-left-color: var(--accent-green);
}

.page-about .story-faq__question {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-light);
  margin: 0 0 0.5em;
}

.page-about .story-faq__answer {
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--story-text-dim);
  margin: 0;
}

.page-about .story-faq__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2.2rem;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.7rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.page-about .btn--primary {
  background: var(--accent-orange);
  color: var(--bg-dark);
  border-color: var(--accent-orange);
}

.page-about .btn--primary:hover {
  background: var(--text-light);
  border-color: var(--text-light);
}

.page-about .btn--ghost {
  background: transparent;
  color: var(--text-light);
  border-color: var(--line-color);
}

.page-about .btn--ghost:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

/* ===== 首屏 Hero ===== */
.page-about .story-hero {
  padding: 2rem 0 3.5rem;
  position: relative;
}

.page-about .story-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 100%;
  background: rgba(58, 46, 93, 0.16);
  clip-path: polygon(18% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .story-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.page-about .story-hero__copy {
  order: 2;
}

.page-about .story-hero__kicker {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-green);
  margin: 0 0 1em;
  position: relative;
  padding-left: 2.2rem;
}

.page-about .story-hero__kicker::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 1.7rem;
  height: 2px;
  background: var(--accent-green);
}

.page-about .story-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.3rem, 6.4vw, 4.1rem);
  line-height: 1.06;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin: 0 0 0.6em;
  color: var(--text-light);
}

.page-about .story-hero__lead {
  font-size: clamp(0.98rem, 1.8vw, 1.15rem);
  line-height: 1.85;
  color: var(--story-text-dim);
  max-width: 560px;
  margin: 0 0 2rem;
}

.page-about .story-hero__meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line-color);
  padding-top: 1.5rem;
  max-width: 560px;
}

.page-about .story-hero__meta-item {
  padding: 0.7rem 0;
}

.page-about .story-hero__meta-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  color: var(--text-light);
  line-height: 1;
}

.page-about .story-hero__meta-value::first-letter {
  color: var(--accent-orange);
}

.page-about .story-hero__meta-label {
  display: block;
  font-size: 0.8rem;
  color: var(--story-text-dim);
  margin-top: 0.4em;
  letter-spacing: 0.04em;
}

.page-about .story-hero__visual {
  position: relative;
  order: 1;
}

.page-about .story-hero__img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--line-color);
  border-radius: var(--radius);
}

.page-about .story-hero__floating {
  position: absolute;
  bottom: 1.2rem;
  left: 1.2rem;
  background: rgba(26, 26, 46, 0.92);
  border-left: 3px solid var(--accent-green);
  padding: 0.85rem 1.2rem;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
}

.page-about .story-hero__floating-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--story-text-dim);
}

.page-about .story-hero__floating-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-green);
  line-height: 1;
  margin-left: 0.4rem;
}

.page-about .story-hero__floating-unit {
  font-size: 0.85rem;
  color: var(--story-text-dim);
}

/* ===== 面包屑 ===== */
.page-about .breadcrumb {
  margin-bottom: 2rem;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.6rem;
  align-items: center;
  font-size: 0.86rem;
}

.page-about .breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--story-text-dim);
}

.page-about .breadcrumb__item:not(:last-child)::after {
  content: "—";
  color: var(--line-color);
  font-family: var(--font-mono);
}

.page-about .breadcrumb__link {
  color: var(--text-light);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .breadcrumb__link:hover {
  color: var(--accent-green);
}

/* ===== 滚动到视区域的过渡 ===== */
.page-about .story-milestone__timeline,
.page-about .story-capability__grid,
.page-about .story-team__grid,
.page-about .story-honor__grid {
  opacity: 1;
  visibility: visible;
}

/* ===== 媒体查询：≥720px ===== */
@media (min-width: 720px) {
  .page-about .story-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 3.5rem;
  }

  .page-about .story-hero__copy {
    order: 1;
  }

  .page-about .story-hero__visual {
    order: 2;
  }

  .page-about .story-hero__meta {
    grid-template-columns: 1fr 1fr;
    gap: 0 1.5rem;
  }

  .page-about .story-mission__grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .page-about .story-milestone__inner {
    grid-template-columns: 240px 1fr;
    gap: 3.5rem;
  }

  .page-about .story-milestone__item {
    grid-template-columns: 110px 1fr;
    gap: 1.5rem;
  }

  .page-about .story-milestone__year {
    text-align: right;
    padding-top: 0.2em;
  }

  .page-about .story-capability__grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .page-about .story-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: 3.5rem;
  }

  .page-about .story-honor__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .page-about .story-faq__inner {
    grid-template-columns: auto 1fr;
    gap: 3.5rem;
  }

  .page-about .story-faq__img {
    width: 240px;
  }

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

/* ===== 媒体查询：≥1024px ===== */
@media (min-width: 1024px) {
  .page-about .story-hero {
    padding: 3rem 0 5rem;
  }

  .page-about .story-hero__grid {
    gap: 5rem;
  }

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

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

  .page-about .story-team__grid {
    gap: 5rem;
  }

  .page-about .story-milestone__inner {
    grid-template-columns: 320px 1fr;
    gap: 5rem;
  }

  .page-about .story-team__stats {
    gap: 1.25rem;
  }
}