/* ========== 页面级变量 ========== */
.page-about {
  --about-blue: #0B1B3D;
  --about-blue-light: #1B3A6B;
  --about-accent: #FF7A00;
  --about-accent-soft: #FFB380;
  --about-gold: #FFD700;
  --about-silver: #C0C0C0;
  --about-paper: #F5EFE6;
  --about-ink: #1A1A1A;
  --about-white: #FFFFFF;
  background: var(--about-paper);
  color: var(--about-ink);
  overflow-x: hidden;
}

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

.page-about .container {
  width: min(1200px, 100% - 48px);
  margin-inline: auto;
}

.page-about a {
  color: inherit;
}

/* ========== 首屏 ========== */
.page-about .about-hero {
  position: relative;
  background:
    linear-gradient(135deg, rgba(255, 122, 0, 0.12) 0%, transparent 30%),
    linear-gradient(135deg, var(--about-blue) 0%, var(--about-blue-light) 60%, var(--about-blue) 100%);
  color: var(--about-white);
  padding: 72px 0 96px;
  border-bottom: 5px solid var(--about-accent);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 10px);
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 36px;
}

.page-about .about-hero-aside .index-label {
  color: var(--about-silver);
  margin-bottom: 18px;
}

.page-about .about-hero-aside .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-family: "Roboto Mono", "SF Mono", Consolas, monospace;
  font-size: 13px;
  color: var(--about-silver);
}

.page-about .about-hero-aside .breadcrumb a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.page-about .about-hero-aside .breadcrumb a:hover {
  color: var(--about-white);
  border-color: var(--about-accent);
}

.page-about .about-hero-aside .breadcrumb .breadcrumb-current {
  color: var(--about-accent-soft);
}

.page-about .about-hero-content h1 {
  margin: 0 0 24px;
  max-width: 780px;
  color: var(--about-white);
}

.page-about .about-hero-lead {
  position: relative;
  margin: 0;
  max-width: 660px;
  font-family: Georgia, "Songti SC", serif;
  font-size: 18px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.9);
  padding-left: 22px;
}

.page-about .about-hero-lead::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  background: var(--about-gold);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 34px;
}

.page-about .about-hero-speed {
  position: absolute;
  right: -30px;
  bottom: 20px;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  transform: rotate(-8deg);
  opacity: 0.4;
  pointer-events: none;
}

.page-about .about-hero-speed i {
  display: block;
  width: 120px;
  height: 4px;
  background: var(--about-accent);
  transform-origin: right center;
}

.page-about .about-hero-speed i:nth-child(1) { width: 90px; opacity: 0.9; }
.page-about .about-hero-speed i:nth-child(2) { width: 140px; opacity: 0.6; }
.page-about .about-hero-speed i:nth-child(3) { width: 200px; opacity: 0.3; }

/* ========== 通用双栏 ========== */
.page-about .about-split {
  display: grid;
  gap: 32px;
  padding: 64px 0;
}

.page-about .about-split-note {
  position: relative;
  border-left: 5px solid var(--about-accent);
  padding-left: 18px;
}

.page-about .about-split-note .index-label {
  color: var(--about-accent);
  margin-bottom: 12px;
}

.page-about .about-split-note .heading-lg {
  margin: 0 0 14px;
  color: var(--about-blue);
}

.page-about .about-split-note-text {
  font-family: Georgia, "Songti SC", serif;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(26, 26, 26, 0.72);
  margin: 0;
}

/* ========== 品牌主张 ========== */
.page-about .about-mission {
  background: var(--about-paper);
}

.page-about .about-mission-card {
  border: 2px solid var(--about-blue);
  box-shadow: 10px 10px 0 rgba(11, 27, 61, 0.1);
}

.page-about .about-mission-card .card-body {
  padding: 28px 24px;
}

.page-about .about-mission-quote {
  background: linear-gradient(135deg, var(--about-blue) 0%, var(--about-blue-light) 100%);
  color: var(--about-white);
  padding: 22px 26px;
  margin-bottom: 24px;
  border-right: 6px solid var(--about-gold);
  font-family: Futura, "Noto Sans SC", sans-serif;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.02em;
}

.page-about .about-mission-text {
  font-family: Georgia, "Songti SC", serif;
  font-size: 16px;
  line-height: 1.8;
  margin: 0 0 24px;
}

.page-about .about-mission-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-mission-list li {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(11, 27, 61, 0.1);
}

.page-about .about-mission-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .about-mission-num {
  font-family: "Roboto Mono", "SF Mono", Consolas, monospace;
  font-size: 13px;
  font-weight: 700;
  color: var(--about-accent);
  padding-top: 4px;
  flex: none;
}

.page-about .about-mission-list h3 {
  font-family: Futura, "Noto Sans SC", sans-serif;
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--about-blue);
}

.page-about .about-mission-list p {
  font-family: Georgia, "Songti SC", serif;
  font-size: 14px;
  line-height: 1.75;
  margin: 0;
  color: rgba(26, 26, 26, 0.78);
}

.page-about .about-mission-img-wrap {
  margin-top: 28px;
  border: 2px solid var(--about-blue);
  box-shadow: 8px 8px 0 rgba(11, 27, 61, 0.12);
  overflow: hidden;
  background: var(--about-blue);
}

.page-about .about-mission-img-wrap img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform var(--transition-base);
}

@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .page-about .about-mission-img-wrap:hover img {
    transform: scale(1.02);
  }
}

/* ========== 时间线 ========== */
.page-about .about-timeline-section {
  position: relative;
  background:
    radial-gradient(circle at 88% 8%, rgba(255, 122, 0, 0.18) 0%, transparent 34%),
    var(--about-blue);
  color: var(--about-white);
  padding: 72px 0;
  overflow: hidden;
}

.page-about .about-timeline-section::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 56px solid var(--about-paper);
  border-left: 56px solid transparent;
}

.page-about .about-timeline-head {
  margin-bottom: 48px;
}

.page-about .about-timeline-head .index-label {
  color: var(--about-silver);
  margin-bottom: 12px;
}

.page-about .about-timeline-head .heading-lg {
  color: var(--about-white);
  margin: 0 0 14px;
  max-width: 680px;
}

.page-about .about-timeline-intro {
  font-family: Georgia, "Songti SC", serif;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.72);
  margin: 0;
  max-width: 480px;
}

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

.page-about .about-tl-item {
  position: relative;
  padding: 0 0 36px 30px;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--about-accent);
  border: 3px solid var(--about-white);
  box-shadow: 0 0 0 3px rgba(255, 122, 0, 0.4);
  z-index: 2;
}

.page-about .about-tl-item::after {
  content: "";
  position: absolute;
  left: 14px;
  top: 30px;
  bottom: -4px;
  width: 2px;
  background: rgba(255, 255, 255, 0.24);
}

.page-about .about-tl-item:last-child::after {
  display: none;
}

.page-about .about-tl-year {
  font-family: "Roboto Mono", "SF Mono", Consolas, monospace;
  font-size: 26px;
  font-weight: 700;
  color: var(--about-gold);
  margin-bottom: 10px;
  line-height: 1.2;
}

.page-about .about-tl-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: none;
  color: var(--about-white);
  padding: 22px;
  border-radius: 0;
  transition: transform var(--transition-base), background var(--transition-base);
}

.page-about .about-tl-card h3 {
  font-family: Futura, "Noto Sans SC", sans-serif;
  font-size: 18px;
  margin: 0 0 10px;
  color: var(--about-white);
}

.page-about .about-tl-card p {
  font-family: Georgia, "Songti SC", serif;
  font-size: 14px;
  line-height: 1.75;
  margin: 0;
  color: rgba(255, 255, 255, 0.84);
}

.page-about .about-tl-tag {
  display: inline-block;
  margin-bottom: 12px;
}

@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .page-about .about-tl-card:hover {
    transform: translateX(6px);
    background: rgba(255, 255, 255, 0.13);
  }
}

/* ========== 数据服务体系 ========== */
.page-about .about-data-section {
  background: var(--about-paper);
}

.page-about .about-data-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 30px;
}

.page-about .about-stat-card {
  position: relative;
  padding: 22px 18px;
  background: var(--about-white);
  border: 2px solid var(--about-blue);
  box-shadow: 6px 6px 0 rgba(11, 27, 61, 0.12);
  border-radius: 0;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.page-about .about-stat-card::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 0;
  height: 0;
  border-left: 18px solid transparent;
  border-bottom: 18px solid var(--about-accent);
}

.page-about .about-stat-num {
  display: block;
  font-family: "Roboto Mono", "SF Mono", Consolas, monospace;
  font-weight: 700;
  font-size: 30px;
  line-height: 1.1;
  color: var(--about-accent);
  margin-bottom: 10px;
}

.page-about .about-stat-label {
  font-family: Georgia, "Songti SC", serif;
  font-size: 14px;
  color: rgba(26, 26, 26, 0.76);
}

@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .page-about .about-stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 10px 10px 0 rgba(11, 27, 61, 0.14);
  }
}

.page-about .about-data-content {
  display: grid;
  gap: 14px;
  margin-bottom: 30px;
}

.page-about .about-data-item {
  background: var(--about-white);
  border-left: 5px solid var(--about-accent);
  padding: 20px 22px;
  box-shadow: var(--shadow-sm);
}

.page-about .about-data-item h3 {
  font-family: Futura, "Noto Sans SC", sans-serif;
  font-size: 17px;
  color: var(--about-blue);
  margin: 0 0 8px;
}

.page-about .about-data-item p {
  font-family: Georgia, "Songti SC", serif;
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
  color: rgba(26, 26, 26, 0.78);
}

.page-about .about-data-img-wrap {
  border: 2px solid var(--about-blue);
  box-shadow: 8px 8px 0 rgba(11, 27, 61, 0.12);
  overflow: hidden;
  background: var(--about-blue);
}

.page-about .about-data-img-wrap img {
  width: 100%;
  object-fit: cover;
}

/* ========== 资质与荣誉 ========== */
.page-about .about-cred-section {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0%, transparent 40%),
    var(--about-blue);
  color: var(--about-white);
}

.page-about .about-cred-section .about-split-note .heading-lg {
  color: var(--about-white);
}

.page-about .about-cred-section .about-split-note-text {
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-cred-cards {
  display: grid;
  gap: 18px;
}

.page-about .about-cred-card {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 0;
  box-shadow: none;
  padding: 26px;
  position: relative;
  transition: transform var(--transition-base), background var(--transition-base);
}

.page-about .about-cred-card::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 0;
  height: 0;
  border-top: 26px solid rgba(255, 215, 0, 0.7);
  border-left: 26px solid transparent;
}

.page-about .about-cred-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  margin-bottom: 18px;
  background: var(--about-accent);
  color: var(--about-white);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 0 100%);
}

.page-about .about-cred-icon svg {
  width: 26px;
  height: 26px;
}

.page-about .about-cred-card h3 {
  font-family: Futura, "Noto Sans SC", sans-serif;
  font-size: 17px;
  color: var(--about-white);
  margin: 0 0 10px;
  padding-right: 16px;
}

.page-about .about-cred-card p {
  font-family: Georgia, "Songti SC", serif;
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
}

.page-about .about-cred-img {
  margin-top: 26px;
  width: 100%;
  border: 2px solid var(--about-gold);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.25);
  object-fit: cover;
}

@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .page-about .about-cred-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.12);
  }
}

/* ========== 团队与协作 ========== */
.page-about .about-team-section {
  background: var(--about-paper);
}

.page-about .about-team-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 30px;
}

.page-about .about-team-stat {
  background: var(--about-blue);
  border-top: 5px solid var(--about-accent);
  box-shadow: 6px 6px 0 rgba(11, 27, 61, 0.12);
  padding: 24px 10px;
  text-align: center;
}

.page-about .about-team-num {
  display: block;
  font-family: "Roboto Mono", "SF Mono", Consolas, monospace;
  font-size: 38px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--about-gold);
}

.page-about .about-team-label {
  display: block;
  margin-top: 10px;
  font-family: Georgia, "Songti SC", serif;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-team-blocks {
  display: grid;
  gap: 14px;
}

.page-about .about-team-block {
  background: var(--about-white);
  border: 2px solid var(--about-blue);
  box-shadow: var(--shadow-sm);
  padding: 22px;
}

.page-about .about-team-block h3 {
  font-family: Futura, "Noto Sans SC", sans-serif;
  font-size: 17px;
  color: var(--about-blue);
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-team-block h3::before {
  content: "";
  width: 20px;
  height: 4px;
  background: var(--about-accent);
  flex: none;
}

.page-about .about-team-block p {
  font-family: Georgia, "Songti SC", serif;
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
  color: rgba(26, 26, 26, 0.78);
}

/* ========== 收尾 CTA ========== */
.page-about .about-end-cta {
  position: relative;
  background:
    radial-gradient(circle at 12% 90%, rgba(255, 122, 0, 0.16) 0%, transparent 30%),
    linear-gradient(135deg, var(--about-blue) 0%, var(--about-blue-light) 100%);
  color: var(--about-white);
  padding: 80px 0;
  overflow: hidden;
}

.page-about .about-end-cta::before {
  content: "";
  position: absolute;
  width: 380px;
  height: 380px;
  right: -140px;
  top: -160px;
  border: 48px solid rgba(255, 215, 0, 0.08);
  border-radius: 50%;
}

.page-about .about-end-cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
}

.page-about .about-end-cta-inner .index-label {
  color: var(--about-gold);
  margin-bottom: 14px;
}

.page-about .about-end-cta-inner .heading-lg {
  color: var(--about-white);
  margin: 0 0 16px;
}

.page-about .about-end-cta-desc {
  font-family: Georgia, "Songti SC", serif;
  font-size: 16px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.84);
  margin: 0;
}

.page-about .about-end-cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-top: 30px;
}

.page-about .about-end-cta-links {
  margin-top: 24px;
  font-family: Georgia, "Songti SC", serif;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.66);
}

.page-about .about-end-cta-links a {
  color: var(--about-accent-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-end-cta-links a:hover {
  color: var(--about-accent);
}

/* ========== 响应式增强 ========== */
@media (min-width: 640px) {

  .page-about .about-hero {
    padding: 88px 0 112px;
  }

  .page-about .about-hero-inner {
    gap: 28px;
  }

  .page-about .about-mission-card .card-body {
    padding: 36px 40px;
  }

  .page-about .about-data-content {
    gap: 18px;
  }

  .page-about .about-cred-cards {
    gap: 22px;
  }

  .page-about .about-team-blocks {
    gap: 18px;
  }
}

@media (min-width: 960px) {

  .page-about .about-split {
    grid-template-columns: 0.62fr 1.38fr;
    gap: 56px;
    padding: 84px 0;
  }

  .page-about .about-split-note {
    position: sticky;
    top: 40px;
    align-self: start;
  }

  .page-about .about-hero-inner {
    grid-template-columns: 260px 1fr;
    gap: 60px;
    align-items: start;
  }

  .page-about .about-data-stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .page-about .about-stat-num {
    font-size: 34px;
  }

  .page-about .about-data-content {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .about-cred-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .about-team-stats {
    gap: 20px;
  }

  .page-about .about-team-blocks {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  /* 时间线桌面版 */
  .page-about .about-timeline {
    padding-left: 20px;
  }

  .page-about .about-tl-item {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 44px;
    padding: 0 0 52px;
  }

  .page-about .about-tl-item::before {
    left: -26px;
    top: 14px;
  }

  .page-about .about-tl-item::after {
    left: -20px;
    top: 38px;
  }

  .page-about .about-tl-year {
    text-align: right;
    margin: 0;
    padding-top: 6px;
  }

  .page-about .about-tl-card {
    padding: 26px 30px;
  }
}

@media (min-width: 1240px) {

  .page-about .about-hero {
    padding: 104px 0 128px;
  }

  .page-about .about-split {
    padding: 96px 0;
  }

  .page-about .about-timeline-section {
    padding: 96px 0;
  }
}

/* ========== 动效降级 ========== */
@media (prefers-reduced-motion: reduce) {

  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }

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