.page-about {
  --about-gold-line: rgba(201, 162, 39, 0.35);
  --about-gold-soft: rgba(201, 162, 39, 0.14);
  --about-line-dark: rgba(11, 59, 45, 0.14);
  --about-body-text: rgba(26, 26, 26, 0.82);
  background: var(--light);
  color: var(--dark);
  overflow-x: hidden;
}

.page-about a {
  color: inherit;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 0;
  background:
    radial-gradient(900px 320px at 90% -10%, rgba(201, 162, 39, 0.18), transparent 60%),
    linear-gradient(140deg, var(--primary-dark) 0%, var(--primary) 55%, var(--primary-light) 100%);
  color: var(--white);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(201, 162, 39, 0.16), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero .breadcrumb {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 24px;
}

.page-about .about-hero .breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: color 0.2s;
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--gold);
}

.page-about .about-hero-frame {
  position: relative;
  z-index: 2;
  border: 1px solid var(--about-gold-line);
  padding: 32px 20px 28px;
  background: rgba(255, 255, 255, 0.03);
}

.page-about .about-hero-frame::before,
.page-about .about-hero-frame::after {
  content: "";
  position: absolute;
  width: 34px;
  height: 34px;
  pointer-events: none;
}

.page-about .about-hero-frame::before {
  top: -1px;
  left: -1px;
  border-top: 3px solid var(--gold);
  border-left: 3px solid var(--gold);
}

.page-about .about-hero-frame::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 3px solid var(--gold);
  border-right: 3px solid var(--gold);
}

.page-about .about-hero-kicker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.page-about .about-hero-vol {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.55);
}

.page-about .about-hero-title {
  font-size: clamp(2rem, 6vw, 3.6rem);
  line-height: 1.1;
  margin: 0 0 14px;
  color: var(--white);
  letter-spacing: 0.02em;
}

.page-about .about-hero-desc {
  max-width: 640px;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.8);
  margin: 0 0 24px;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 36px;
}

.page-about .about-hero-stat {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-about .about-hero-stat:hover {
  background: rgba(255, 255, 255, 0.11);
  border-color: rgba(201, 162, 39, 0.5);
}

.page-about .about-hero-stat-num {
  font-family: var(--font-data);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1.1;
}

.page-about .about-hero-stat-suffix {
  font-size: 1rem;
  margin-left: 1px;
}

.page-about .about-hero-stat-label {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-hero-scale {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  margin-top: 24px;
  padding: 0 20px;
  height: 24px;
}

.page-about .about-hero-scale span {
  display: block;
  width: 4px;
  height: 8px;
  background: var(--gold);
  opacity: 0.5;
}

.page-about .about-hero-scale span:nth-child(3n) {
  height: 20px;
  opacity: 0.8;
}

.page-about .about-hero-scale span:nth-child(2n) {
  height: 14px;
}

.page-about .about-hero-scale span:nth-child(5n) {
  height: 24px;
  opacity: 0.9;
}

/* ===== 章节索引 ===== */
.page-about .about-index {
  background: var(--white);
  border-bottom: 1px solid var(--about-line-dark);
}

.page-about .about-index-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: nowrap;
  padding: 14px 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-about .about-index-inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-index-label {
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--primary);
  text-transform: uppercase;
  white-space: nowrap;
}

.page-about .about-index-list {
  display: flex;
  align-items: center;
  gap: 8px 18px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1 1 auto;
  min-width: max-content;
}

.page-about .about-index-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  text-decoration: none;
  font-size: 0.875rem;
  color: var(--dark);
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s, color 0.2s;
  white-space: nowrap;
}

.page-about .about-index-list a:hover {
  border-color: var(--gold);
  color: var(--primary);
}

.page-about .about-index-no {
  font-family: var(--font-data);
  font-size: 0.72rem;
  color: var(--gold);
}

.page-about .about-index-cta {
  flex: 0 0 auto;
  font-size: 0.875rem;
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
  white-space: nowrap;
  margin-left: 8px;
  transition: color 0.2s;
}

.page-about .about-index-cta:hover {
  color: var(--gold);
}

/* ===== 章节通用 ===== */
.page-about .about-chapter {
  padding: 56px 0;
}

.page-about .about-chapter-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-chapter-side {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-about .about-chapter-no {
  font-family: var(--font-data);
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-chapter-label {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(11, 59, 45, 0.55);
}

.page-about .about-chapter-main {
  max-width: 860px;
  min-width: 0;
}

.page-about .about-chapter-head {
  border-bottom: 1px solid var(--about-line-dark);
  padding-bottom: 14px;
  margin-bottom: 24px;
}

.page-about .about-chapter-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.2;
  margin: 8px 0 0;
  color: var(--primary);
  letter-spacing: 0.01em;
}

.page-about .about-chapter-body,
.page-about .about-team-copy {
  line-height: 1.75;
  font-size: 1rem;
}

.page-about .about-chapter-body p,
.page-about .about-team-copy p {
  margin: 0 0 14px;
}

.page-about .about-chapter-body a,
.page-about .about-team-copy a,
.page-about .about-data-content a,
.page-about .about-honor-note a {
  color: var(--primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.2s;
}

.page-about .about-chapter-body a:hover,
.page-about .about-team-copy a:hover,
.page-about .about-data-content a:hover,
.page-about .about-honor-note a:hover {
  color: var(--gold);
}

/* ===== 图注 ===== */
.page-about figure {
  margin: 0;
}

.page-about figcaption {
  margin-top: 10px;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: rgba(11, 59, 45, 0.65);
}

.page-about .about-story-media img,
.page-about .about-team-media img,
.page-about .about-data-media img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  object-fit: cover;
}

/* ===== 深色章节 ===== */
.page-about .about-chapter-dark {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.82);
}

.page-about .about-chapter-dark .about-chapter-head {
  border-color: rgba(255, 255, 255, 0.16);
}

.page-about .about-chapter-dark .about-chapter-head h2 {
  color: var(--white);
}

.page-about .about-chapter-dark .about-chapter-label {
  color: rgba(255, 255, 255, 0.5);
}

.page-about .about-chapter-dark .about-chapter-head .eyebrow {
  color: var(--gold);
}

.page-about .about-chapter-dark figcaption {
  color: rgba(255, 255, 255, 0.5);
}

.page-about .about-chapter-dark .about-timeline-content h3 {
  color: var(--white);
}

/* ===== 时间线 ===== */
.page-about .about-timeline {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 20px;
  width: 2px;
  background: linear-gradient(to bottom, var(--gold), rgba(201, 162, 39, 0.25));
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 32px 36px;
}

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

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold);
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 5px rgba(201, 162, 39, 0.18);
  box-sizing: border-box;
}

.page-about .about-timeline-mark {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: var(--gold);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.page-about .about-timeline-content h3 {
  font-size: 1.2rem;
  margin: 0 0 6px;
  color: var(--primary);
}

.page-about .about-timeline-content p {
  font-size: 0.95rem;
  margin: 0;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-chapter-dark .about-timeline-item::before {
  border-color: var(--primary);
  background: var(--gold);
}

/* ===== 团队与资质 ===== */
.page-about .about-team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-team-media {
  margin-top: 4px;
}

.page-about .about-credential-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line-dark);
}

.page-about .about-credential-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-line-dark);
}

.page-about .about-credential-key {
  font-size: 0.84rem;
  color: rgba(11, 59, 45, 0.65);
}

.page-about .about-credential-value {
  font-family: var(--font-data);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--primary);
  text-align: right;
}

/* ===== 数据能力 ===== */
.page-about .about-data-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 32px;
}

.page-about .about-data-stat-card {
  background: var(--white);
  border-top: 4px solid var(--gold);
  border-radius: var(--radius);
  padding: 18px 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.page-about .about-data-stat-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.1);
}

.page-about .about-data-stat-card::after {
  content: "↗";
  position: absolute;
  top: 12px;
  right: 14px;
  font-family: var(--font-data);
  font-size: 0.9rem;
  color: var(--orange);
  opacity: 0;
  transition: opacity 0.2s;
}

.page-about .about-data-stat-card:hover::after {
  opacity: 1;
}

.page-about .about-data-stat-num {
  display: block;
  font-family: var(--font-data);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

.page-about .about-data-stat-desc {
  display: block;
  margin-top: 6px;
  font-size: 0.8rem;
  color: rgba(26, 26, 26, 0.75);
  line-height: 1.5;
}

.page-about .about-data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 24px;
}

.page-about .about-data-content h3 {
  font-size: 1.125rem;
  margin: 24px 0 8px;
  color: var(--primary);
  letter-spacing: 0.02em;
}

.page-about .about-data-content p {
  margin: 0 0 12px;
  line-height: 1.7;
  font-size: 0.95rem;
}

.page-about .about-data-note {
  font-size: 0.85rem;
  color: rgba(11, 59, 45, 0.75);
  border-left: 3px solid var(--gold);
  padding-left: 12px;
  margin-top: 20px;
}

.page-about .tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 4px;
  padding: 0;
  list-style: none;
}

.page-about .tag {
  background: var(--primary);
  color: var(--white);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  line-height: 1.4;
}

/* ===== 合作与荣誉 ===== */
.page-about .about-partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 20px;
}

.page-about .about-partner-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-about .about-partner-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(201, 162, 39, 0.45);
}

.page-about .about-partner-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(201, 162, 39, 0.5);
  color: var(--gold);
  font-size: 0.9rem;
  margin-bottom: 14px;
}

.page-about .about-partner-card h3 {
  font-size: 1.1rem;
  color: var(--white);
  margin: 0 0 8px;
}

.page-about .about-partner-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.74);
}

.page-about .about-honor-note {
  margin: 24px 0 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.62);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding-top: 18px;
}

.page-about .about-honor-note a {
  color: var(--gold);
}

/* ===== 收束 ===== */
.page-about .about-closing {
  padding: 64px 0;
  background: var(--white);
}

.page-about .about-closing-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

.page-about .about-closing-copy h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--primary);
  margin: 0 0 10px;
}

.page-about .about-closing-copy p {
  color: rgba(11, 59, 45, 0.7);
  line-height: 1.7;
  margin: 0;
}

.page-about .about-closing-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-closing .about-legal {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--about-line-dark);
  font-size: 0.82rem;
  color: rgba(11, 59, 45, 0.55);
  line-height: 1.6;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 64px 0 0;
  }

  .page-about .about-hero-frame {
    padding: 48px 56px 40px;
  }

  .page-about .about-hero-stat-num {
    font-size: 2rem;
  }

  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .page-about .about-index-list {
    gap: 8px 24px;
  }

  .page-about .about-chapter {
    padding: 84px 0;
  }

  .page-about .about-chapter-grid {
    grid-template-columns: 168px 1fr;
    gap: 56px;
  }

  .page-about .about-chapter-side {
    display: block;
  }

  .page-about .about-chapter-label {
    margin-top: 12px;
  }

  .page-about .about-story-media {
    margin-left: 8%;
  }

  .page-about .about-team-layout {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-team-media {
    margin-top: 0;
  }

  .page-about .about-data-stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .page-about .about-data-grid {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-partner-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .about-closing-inner {
    grid-template-columns: 1fr auto;
  }
}