/* ===== 关于页专属样式 ===== */
.page-about {
  --about-hard-shadow: 8px 8px 0 rgba(0, 166, 255, 0.14);
}

/* --- 首屏 Hero --- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-height) + 40px) 0 56px;
  background: linear-gradient(140deg, #0B3B24 0%, #082E1E 54%, #052818 100%);
  color: #FFFFFF;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 38%;
  height: 6px;
  background: linear-gradient(90deg, transparent, #00A6FF);
  z-index: 1;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -140px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 166, 255, 0.2), transparent 66%);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 36px;
  align-items: center;
}

.page-about .about-hero__copy {
  display: flex;
  flex-direction: column;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 18px;
}

.page-about .about-hero .breadcrumb__item {
  color: rgba(255, 255, 255, 0.66);
  font-size: 0.88rem;
  text-decoration: none;
}

.page-about .about-hero .breadcrumb__item[aria-current="page"] {
  color: #FFFFFF;
}

.page-about .about-hero__kicker {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #00A6FF;
}

.page-about .about-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5.4vw, 4rem);
  line-height: 1.04;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.page-about .about-hero__lead {
  margin: 0 0 22px;
  max-width: 620px;
  font-size: 1.02rem;
  line-height: 1.72;
  color: rgba(255, 255, 255, 0.86);
}

.page-about .about-hero__keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero__keywords .tag {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.26);
  color: #FFFFFF;
}

.page-about .about-hero__visual {
  position: relative;
  clip-path: polygon(8% 0, 100% 0, 100% 94%, 0 100%);
  border: 3px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-blue);
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-hero__stat {
  position: absolute;
  right: 14px;
  bottom: 24px;
  padding: 10px 16px;
  background: #FFD700;
  border: 3px solid #FFFFFF;
  box-shadow: var(--shadow-hard);
  color: #1A1A1A;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.04em;
  transform: rotate(-2deg);
}

/* --- 左右分屏骨架 --- */
.page-about .about-layout {
  display: block;
  gap: 40px;
  padding: 48px 0 24px;
}

.page-about .about-rail {
  display: flex;
  flex-wrap: nowrap;
  gap: 6px;
  overflow-x: auto;
  margin-bottom: 28px;
  padding: 10px 12px;
  background: #0B3B24;
  border: 3px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-hard);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-rail::-webkit-scrollbar {
  height: 4px;
}

.page-about .about-rail::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.3);
}

.page-about .about-rail__label {
  flex: 0 0 auto;
  align-self: center;
  padding-right: 8px;
  margin-right: 4px;
  border-right: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.6);
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-about .about-rail__item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  color: rgba(255, 255, 255, 0.78);
  font-family: var(--font-display);
  font-size: 0.86rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: color 0.25s, background-color 0.25s, border-color 0.25s;
}

.page-about .about-rail__item:hover,
.page-about .about-rail__item.is-active {
  color: #FFFFFF;
  background: rgba(0, 166, 255, 0.16);
  border-color: rgba(0, 166, 255, 0.4);
}

.page-about .about-rail__num {
  font-weight: 700;
  color: #00A6FF;
  font-size: 0.8rem;
}

.page-about .about-main {
  min-width: 0;
  border-top: 3px solid rgba(11, 59, 36, 0.12);
}

/* --- 章节通用样式 --- */
.page-about .about-story,
.page-about .about-milestones,
.page-about .about-eco,
.page-about .about-team {
  border-bottom: 1px solid rgba(11, 59, 36, 0.16);
}

.page-about .section-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 16px;
  margin-bottom: 36px;
  padding-bottom: 14px;
  border-bottom: 3px solid rgba(0, 166, 255, 0.2);
}

.page-about .section-heading__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 4vw, 3.4rem);
  line-height: 1;
  color: #00A6FF;
  letter-spacing: 0.02em;
}

.page-about .section-heading__title {
  margin: 0;
  color: #1A1A1A;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.6vw, 2.3rem);
  font-weight: 600;
  line-height: 1.15;
}

.page-about .section-heading__meta {
  margin-left: auto;
  color: rgba(26, 26, 26, 0.5);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* --- 01 品牌故事 --- */
.page-about .about-story__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-story__text p {
  margin: 0 0 16px;
  line-height: 1.7;
  color: rgba(26, 26, 26, 0.84);
}

.page-about .about-story__facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.page-about .about-story__facts .data-card {
  margin: 0;
  padding: 18px 14px;
  background: #FFFFFF;
  border: 3px solid rgba(11, 59, 36, 0.2);
  box-shadow: 6px 6px 0 rgba(11, 59, 36, 0.08);
}

.page-about .about-story__facts .data-card__value {
  display: block;
  margin-top: 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.8rem;
  line-height: 1;
  color: #0B3B24;
}

.page-about .about-data-note {
  display: block;
  margin-top: 8px;
  font-size: 0.78rem;
  line-height: 1.4;
  color: rgba(26, 26, 26, 0.6);
}

/* --- 02 发展历程 --- */
.page-about .about-milestones__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-timeline {
  margin: 4px 0 0;
  padding: 0 0 8px;
  list-style: none;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 28px;
  left: 13px;
  width: 3px;
  background: linear-gradient(to bottom, #00A6FF, #2ECC71);
  opacity: 0.34;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 46px;
  padding-bottom: 34px;
}

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

.page-about .about-timeline__marker {
  position: absolute;
  top: -4px;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: #0B3B24;
  border: 2px solid #00A6FF;
  box-shadow: 0 0 0 4px rgba(0, 166, 255, 0.12);
  color: #FFFFFF;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.78rem;
}

.page-about .about-timeline__card {
  padding: 18px 20px;
  background: #FFFFFF;
  border: 1px solid rgba(11, 59, 36, 0.14);
  border-left: 4px solid #0B3B24;
  box-shadow: var(--shadow-hard);
  transition: transform 0.3s, box-shadow 0.3s;
}

.page-about .about-timeline__item:hover .about-timeline__card {
  transform: translateY(-3px);
  box-shadow: 10px 10px 0 rgba(0, 166, 255, 0.2);
}

.page-about .about-timeline__card .tag {
  margin-bottom: 8px;
}

.page-about .about-timeline__card h3 {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: 1.18rem;
  line-height: 1.2;
  color: #1A1A1A;
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.6;
  color: rgba(26, 26, 26, 0.78);
}

.page-about .about-milestones__figure {
  margin: 8px 0 0;
}

.page-about .about-milestones__figure .img-frame {
  margin-bottom: 10px;
  box-shadow: var(--shadow-blue);
}

.page-about .about-milestones__figure figcaption {
  padding-left: 12px;
  border-left: 3px solid #00A6FF;
  font-size: 0.84rem;
  line-height: 1.5;
  color: rgba(26, 26, 26, 0.58);
}

/* --- 03 资质与认证 --- */
.page-about .about-cert {
  position: relative;
  margin-top: 48px;
  padding: 56px 24px;
  background: linear-gradient(145deg, #0B3B24 0%, #003366 100%);
  color: #FFFFFF;
  clip-path: polygon(0 1.6%, 100% 0, 100% 98.4%, 0 100%);
}

.page-about .about-cert .section-heading {
  border-bottom-color: rgba(255, 255, 255, 0.16);
}

.page-about .about-cert .section-heading__title {
  color: #FFFFFF;
}

.page-about .about-cert .section-heading__meta {
  color: rgba(255, 255, 255, 0.5);
}

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

.page-about .about-cert__card {
  padding: 26px 22px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(0, 166, 255, 0.36);
  transition: background-color 0.3s, transform 0.3s;
}

.page-about .about-cert__card:hover {
  background: rgba(0, 166, 255, 0.08);
  transform: translateY(-3px);
}

.page-about .about-cert__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  height: 54px;
  margin-bottom: 16px;
  padding: 0 10px;
  border: 2px solid #FFD700;
  clip-path: polygon(0 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  color: #FFD700;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.08em;
}

.page-about .about-cert__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.16rem;
  line-height: 1.3;
}

.page-about .about-cert__card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.62;
  color: rgba(255, 255, 255, 0.74);
}

.page-about .about-cert__track {
  display: grid;
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-cert__track-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.page-about .about-cert__track-label {
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.88rem;
}

.page-about .about-cert__track-value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  line-height: 1;
  color: #00A6FF;
}

/* --- 04 合作生态 --- */
.page-about .about-eco__grid {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .about-eco__content p {
  line-height: 1.7;
  color: rgba(26, 26, 26, 0.84);
}

.page-about .about-eco__list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-eco__list li {
  position: relative;
  padding: 10px 14px 10px 42px;
  background: #FFFFFF;
  border: 1px solid rgba(11, 59, 36, 0.16);
  border-left: 4px solid #00A6FF;
  font-size: 0.92rem;
  font-weight: 500;
  color: #1A1A1A;
}

.page-about .about-eco__list li::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 50%;
  width: 10px;
  height: 10px;
  transform: translateY(-50%);
  background: #0B3B24;
  border: 2px solid #00A6FF;
}

.page-about .about-eco__figure {
  margin: 0;
  box-shadow: var(--shadow-blue);
}

/* --- 05 团队与组织 --- */
.page-about .about-team__grid {
  display: grid;
  gap: 18px;
}

.page-about .about-team__card {
  margin: 0;
  padding: 24px 20px;
  background: #FFFFFF;
  border: 3px solid rgba(11, 59, 36, 0.18);
  box-shadow: 6px 6px 0 rgba(0, 166, 255, 0.14);
}

.page-about .about-team__card .data-card__value {
  display: block;
  margin-top: 6px;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: #0B3B24;
}

.page-about .about-team__note {
  padding: 24px 20px;
  background: #0B3B24;
  border-left: 4px solid #FFD700;
  color: rgba(255, 255, 255, 0.82);
}

.page-about .about-team__note p {
  margin: 0;
  line-height: 1.7;
}

/* --- 底部 CTA --- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  margin-top: 56px;
  padding: 56px 28px;
  text-align: center;
  background: linear-gradient(145deg, #0B3B24, #003366);
  color: #FFFFFF;
  box-shadow: var(--shadow-hard);
}

.page-about .about-cta .highlight-num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(4rem, 8vw, 7rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 2px rgba(255, 215, 0, 0.7);
}

.page-about .about-cta h2 {
  margin: 0 auto 12px;
  max-width: 560px;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.15;
}

.page-about .about-cta p {
  margin: 0 auto 24px;
  max-width: 480px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.74);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.page-about .about-cta .btn--ghost {
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
}

/* --- 桌面端布局增强 --- */
@media (min-width: 768px) {
  .page-about .about-cert__grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-cert__track {
    grid-template-columns: 1fr 1fr;
    gap: 0 36px;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .page-about .about-team__note {
    grid-column: 1 / -1;
  }
}

@media (min-width: 992px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 64px;
  }

  .page-about .about-story__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-milestones__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-milestones__figure {
    position: sticky;
    top: calc(var(--header-height) + 32px);
    margin-top: 8px;
  }

  .page-about .about-eco__grid {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-height) + 24px);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    overflow: visible;
    margin-bottom: 0;
    padding: 22px 16px;
  }

  .page-about .about-rail__label {
    display: block;
    align-self: stretch;
    padding: 0 0 12px;
    margin: 0 0 10px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  }

  .page-about .about-rail__item {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 10px 8px;
    border-left: 3px solid transparent;
    font-size: 0.95rem;
  }

  .page-about .about-rail__item.is-active {
    border-left-color: #00A6FF;
    background: rgba(255, 255, 255, 0.06);
  }

  .page-about .about-rail__num {
    min-width: 24px;
    font-size: 1rem;
  }
}

/* --- reduced-motion 降级 --- */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}