/* ===== 页面作用域：.page-about ===== */
.page-about {
  --about-gold-soft: rgba(255, 193, 7, 0.32);
  --about-blue-line: rgba(0, 229, 255, 0.45);
  --about-panel-bg: rgba(11, 58, 44, 0.88);
  --about-panel-border: rgba(255, 193, 7, 0.25);
  --about-mist-green: #e9f2ea;
  --about-deep-shadow: rgba(11, 58, 44, 0.55);
  background: var(--color-grass);
  color: var(--color-mist);
  overflow-x: hidden;
}

/* ---------- 首屏封面 ---------- */
.page-about .about-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  background-color: var(--color-deep);
  color: var(--color-mist);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
  opacity: 0.5;
}

.page-about .about-hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    180deg,
    rgba(11, 58, 44, 0.15) 0%,
    rgba(11, 58, 44, 0.55) 60%,
    rgba(11, 58, 44, 0.96) 100%
  );
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  padding-top: calc(var(--header-h) + 40px);
  padding-bottom: 56px;
  width: 100%;
}

.page-about .about-hero__content {
  max-width: 820px;
}

.page-about .about-hero__title {
  font-family: var(--font-title);
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.02em;
  margin: 16px 0 8px;
  text-shadow: 0 2px 24px rgba(11, 58, 44, 0.6);
}

.page-about .about-hero__sub {
  font-family: var(--font-title);
  font-size: clamp(1.1rem, 2.4vw, 1.6rem);
  font-weight: 700;
  color: var(--color-gold);
  margin: 0 0 20px;
  letter-spacing: 0.08em;
}

.page-about .about-hero__desc {
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(245, 245, 245, 0.88);
  margin: 0 0 28px;
  max-width: 640px;
}

.page-about .about-hero__index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-bottom: 32px;
}

.page-about .about-hero__index-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(245, 245, 245, 0.28);
  background: rgba(11, 58, 44, 0.45);
  color: var(--color-mist);
  font-size: 0.9rem;
  font-family: var(--font-body);
  text-decoration: none;
  transition: border-color var(--ease-base), background-color var(--ease-base), color var(--ease-base);
}

.page-about .about-hero__index-item:hover {
  border-color: var(--color-gold);
  background: rgba(11, 58, 44, 0.75);
  color: var(--color-gold);
}

.page-about .about-hero__index-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-blue);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 0;
  border-top: 1px solid rgba(245, 245, 245, 0.18);
  padding-top: 24px;
}

.page-about .about-hero__stat {
  text-align: left;
}

.page-about .about-hero__stat-num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  color: var(--color-gold);
  line-height: 1.2;
  margin-bottom: 4px;
}

.page-about .about-hero__stat-label {
  font-size: 0.85rem;
  color: rgba(245, 245, 245, 0.7);
  margin: 0;
}

.page-about .about-hero__scroll {
  position: absolute;
  right: 20px;
  bottom: 20px;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: rgba(245, 245, 245, 0.7);
  writing-mode: horizontal-tb;
}

.page-about .about-hero__scroll-text {
  letter-spacing: 0.1em;
}

/* ---------- 品牌起源 ---------- */
.page-about .about-origin {
  position: relative;
  background: var(--color-grass);
  color: var(--color-mist);
  padding-top: 88px;
  padding-bottom: 96px;
}

.page-about .about-origin::before {
  content: "";
  position: absolute;
  top: -24px;
  left: 0;
  right: 0;
  height: 48px;
  background: var(--color-grass);
  transform: skewY(-1.4deg);
  z-index: 1;
}

.page-about .about-origin .section-header,
.page-about .about-timeline .section-header,
.page-about .about-team .section-header,
.page-about .about-commitment .section-header,
.page-about .about-more .section-header {
  margin-bottom: 48px;
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}

.page-about .about-origin__text p {
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(245, 245, 245, 0.88);
  margin-bottom: 18px;
}

.page-about .about-origin__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 28px;
}

.page-about .about-origin__fact {
  flex: 1;
  min-width: 120px;
  padding: 18px 16px;
  background: rgba(11, 58, 44, 0.6);
  border: 1px solid rgba(255, 193, 7, 0.2);
  border-radius: var(--radius-md);
  text-align: center;
}

.page-about .about-origin__fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-gold);
  line-height: 1.2;
}

.page-about .about-origin__fact-label {
  display: block;
  font-size: 0.85rem;
  color: rgba(245, 245, 245, 0.72);
  margin-top: 6px;
}

.page-about .about-origin__visual {
  position: relative;
}

.page-about .about-origin__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.page-about .about-origin__image img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  transition: transform var(--ease-slow);
}

.page-about .about-origin__image:hover img {
  transform: scale(1.03);
}

.page-about .about-origin__note {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  padding: 12px 16px;
  background: rgba(11, 58, 44, 0.55);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  color: rgba(245, 245, 245, 0.78);
}

/* ---------- 发展里程碑 ---------- */
.page-about .about-timeline {
  position: relative;
  background: var(--color-deep);
  color: var(--color-mist);
  padding-top: 104px;
  padding-bottom: 96px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: -26px;
  left: 0;
  right: 0;
  height: 52px;
  background: var(--color-deep);
  transform: skewY(1.2deg);
  z-index: 1;
}

.page-about .about-timeline__list {
  position: relative;
  padding-left: 48px;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 18px;
  width: 2px;
  background: linear-gradient(
    to bottom,
    var(--color-gold) 0%,
    rgba(255, 193, 7, 0.35) 35%,
    rgba(0, 229, 255, 0.4) 70%,
    rgba(255, 193, 7, 0.6) 100%
  );
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 48px;
}

.page-about .about-timeline__item:last-of-type {
  margin-bottom: 0;
}

.page-about .about-timeline__marker {
  position: absolute;
  top: 4px;
  left: -48px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-deep);
  border: 2px solid var(--color-gold);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 2;
  box-shadow: 0 0 16px rgba(255, 193, 7, 0.2);
}

.page-about .about-timeline__version {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: rgba(245, 245, 245, 0.65);
  line-height: 1.2;
  margin-top: 1px;
}

.page-about .about-timeline__panel {
  background: var(--about-panel-bg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 20px 20px 18px;
  transition: border-color var(--ease-base), box-shadow var(--ease-base);
}

.page-about .about-timeline__panel:hover {
  border-color: var(--about-panel-border);
  box-shadow: var(--shadow-md);
}

.page-about .about-timeline__heading {
  font-family: var(--font-title);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-mist);
  margin: 0 0 10px;
}

.page-about .about-timeline__panel p {
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(245, 245, 245, 0.82);
  margin: 0;
}

.page-about .about-timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.page-about .about-timeline__tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.25);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-blue);
}

.page-about .about-timeline__visual {
  margin: 48px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

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

.page-about .about-timeline__milestone {
  margin-top: 64px;
  padding: 40px 24px;
  background: linear-gradient(135deg, rgba(255, 193, 7, 0.12) 0%, rgba(11, 58, 44, 0.6) 60%);
  border: 1px solid rgba(255, 193, 7, 0.3);
  border-radius: var(--radius-lg);
  text-align: center;
}

.page-about .about-timeline__milestone-num {
  font-family: var(--font-mono);
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 900;
  color: var(--color-gold);
  line-height: 1;
  text-shadow: 0 0 40px rgba(255, 193, 7, 0.3);
}

.page-about .about-timeline__milestone-label {
  display: block;
  font-size: 1rem;
  color: var(--color-mist);
  margin-top: 8px;
  letter-spacing: 0.06em;
}

.page-about .about-timeline__milestone-line {
  width: 80px;
  height: 2px;
  margin: 16px auto;
  background: linear-gradient(to right, transparent, var(--color-blue), transparent);
}

.page-about .about-timeline__milestone-sub {
  font-size: 0.9rem;
  color: rgba(245, 245, 245, 0.75);
}

/* ---------- 团队与技术能力 ---------- */
.page-about .about-team {
  position: relative;
  background: var(--color-grass-bright);
  color: var(--color-mist);
  padding-top: 104px;
  padding-bottom: 96px;
}

.page-about .about-team::before {
  content: "";
  position: absolute;
  top: -24px;
  left: 0;
  right: 0;
  height: 48px;
  background: var(--color-grass-bright);
  transform: skewY(-1.2deg);
  z-index: 1;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .about-team__content p {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(245, 245, 245, 0.9);
  margin-bottom: 18px;
}

.page-about .about-team__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .about-team__list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(245, 245, 245, 0.12);
  font-size: 0.95rem;
  color: rgba(245, 245, 245, 0.88);
}

.page-about .about-team__list-item:last-child {
  border-bottom: none;
}

.page-about .about-team__visual {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-team__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

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

.page-about .about-team__card {
  background: rgba(11, 58, 44, 0.55);
  border: 1px solid rgba(255, 193, 7, 0.2);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}

.page-about .about-team__card-label {
  display: block;
  font-size: 0.82rem;
  color: rgba(245, 245, 245, 0.7);
}

.page-about .about-team__card-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 3.6rem;
  font-weight: 900;
  color: var(--color-gold);
  line-height: 1.2;
}

.page-about .about-team__card-unit {
  font-size: 1.4rem;
  margin-left: 4px;
}

.page-about .about-team__card-meta {
  display: block;
  font-size: 0.82rem;
  color: rgba(245, 245, 245, 0.65);
}

/* ---------- 数据服务承诺 ---------- */
.page-about .about-commitment {
  position: relative;
  background: linear-gradient(180deg, var(--color-deep) 0%, rgba(11, 58, 44, 0.9) 45%, var(--color-mist-green) 100%);
  color: var(--color-mist);
  padding-top: 104px;
  padding-bottom: 96px;
}

.page-about .about-commitment::before {
  content: "";
  position: absolute;
  top: -24px;
  left: 0;
  right: 0;
  height: 48px;
  background: var(--color-deep);
  transform: skewY(1.2deg);
  z-index: 1;
}

.page-about .about-commitment .section-title,
.page-about .about-commitment .section-sub {
  text-shadow: 0 1px 12px rgba(11, 58, 44, 0.5);
}

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

.page-about .about-commitment__card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-md);
  transition: transform var(--ease-base), box-shadow var(--ease-base);
}

.page-about .about-commitment__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.page-about .about-commitment__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 193, 7, 0.15);
  color: var(--color-gold);
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.page-about .about-commitment__title {
  font-family: var(--font-title);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-ink);
  margin: 0 0 10px;
}

.page-about .about-commitment__text {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(26, 26, 26, 0.75);
  margin: 0;
}

.page-about .about-commitment__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 24px 16px;
  background: rgba(11, 58, 44, 0.72);
  border-radius: var(--radius-md);
  border-top: 2px solid var(--about-blue-line);
  backdrop-filter: blur(4px);
}

.page-about .about-commitment__bar-item {
  flex: 1;
  min-width: 120px;
  text-align: center;
  padding: 12px 8px;
}

.page-about .about-commitment__bar-item + .about-commitment__bar-item {
  border-left: 1px solid rgba(0, 229, 255, 0.22);
}

.page-about .about-commitment__bar-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-gold);
  line-height: 1.2;
}

.page-about .about-commitment__bar-label {
  display: block;
  font-size: 0.82rem;
  color: rgba(245, 245, 245, 0.72);
  margin-top: 4px;
}

.page-about .about-commitment__note {
  margin-top: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(198, 40, 40, 0.1);
  border: 1px solid rgba(198, 40, 40, 0.3);
  border-radius: var(--radius-pill);
  font-size: 0.86rem;
  color: rgba(245, 245, 245, 0.85);
}

/* ---------- 继续了解 ---------- */
.page-about .about-more {
  background: var(--color-mist-green);
  color: var(--color-ink);
  padding-top: 88px;
  padding-bottom: 96px;
}

.page-about .about-more__inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.page-about .about-more__title {
  font-family: var(--font-title);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  margin: 16px 0 12px;
  color: var(--color-deep);
}

.page-about .about-more__desc {
  font-size: 1rem;
  line-height: 1.7;
  color: rgba(26, 26, 26, 0.7);
  margin: 0 0 32px;
}

.page-about .about-more__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.page-about .about-more .btn--outline {
  border-color: var(--color-grass);
  color: var(--color-grass);
}

.page-about .about-more .btn--outline:hover {
  background: rgba(15, 76, 58, 0.08);
}

.page-about .about-more .btn--ghost {
  color: var(--color-grass);
}

.page-about .about-more .btn--ghost:hover {
  background: rgba(15, 76, 58, 0.06);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 700px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-timeline__list {
    padding-left: 72px;
  }

  .page-about .about-timeline__list::before {
    left: 24px;
  }

  .page-about .about-timeline__marker {
    left: -72px;
    width: 50px;
    height: 50px;
  }

  .page-about .about-timeline__version {
    font-size: 0.8rem;
  }

  .page-about .about-timeline__year {
    font-size: 0.65rem;
  }

  .page-about .about-timeline__panel {
    max-width: 680px;
  }

  .page-about .about-commitment__bar {
    padding: 28px 24px;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero__inner {
    padding-bottom: 72px;
  }

  .page-about .about-hero__desc {
    font-size: 1.06rem;
    max-width: 640px;
  }

  .page-about .about-origin {
    padding-top: 120px;
    padding-bottom: 120px;
  }

  .page-about .about-timeline {
    padding-top: 128px;
    padding-bottom: 120px;
  }

  .page-about .about-timeline__list {
    padding-left: 0;
  }

  .page-about .about-timeline__list::before {
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
  }

  .page-about .about-timeline__item {
    width: 50%;
    padding-right: 56px;
    text-align: right;
    margin-bottom: 56px;
  }

  .page-about .about-timeline__item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 56px;
    text-align: left;
  }

  .page-about .about-timeline__marker {
    right: -25px;
    left: auto;
    width: 50px;
    height: 50px;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__marker {
    left: -25px;
    right: auto;
  }

  .page-about .about-timeline__panel {
    max-width: none;
  }

  .page-about .about-timeline__visual {
    margin: 56px auto;
    max-width: 860px;
  }

  .page-about .about-team {
    padding-top: 128px;
    padding-bottom: 120px;
  }

  .page-about .about-commitment {
    padding-top: 128px;
    padding-bottom: 120px;
  }

  .page-about .about-commitment__grid {
    margin-bottom: 56px;
  }

  .page-about .about-commitment__bar {
    padding: 32px 32px;
  }

  .page-about .about-more {
    padding-top: 110px;
    padding-bottom: 120px;
  }
}

/* ---------- 宽屏适配 ---------- */
@media (min-width: 1440px) {
  .page-about .about-hero__inner {
    max-width: 1440px;
  }

  .page-about .about-hero__content {
    max-width: 900px;
  }

  .page-about .about-origin__grid {
    gap: 64px;
  }

  .page-about .about-team__grid {
    gap: 64px;
  }
}

/* ---------- 减少动态效果偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__bg img,
  .page-about .about-origin__image img,
  .page-about .about-team__image img,
  .page-about .about-timeline__visual img {
    transition: none;
  }

  .page-about .about-commitment__card:hover {
    transform: none;
  }
}

.page-about {
  --color-mist-green: transparent;
}