.page-about {
  position: relative;
  z-index: 1;
  background-color: var(--primary-navy);
  color: var(--text-light);
  overflow-x: clip;
}

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

/* ===== 首屏品牌声明 ===== */
.page-about .about-hero {
  padding-block: calc(var(--header-h-mobile) + 2.5rem) 3rem;
  background:
    linear-gradient(135deg, rgba(15, 32, 39, 0.1) 0%, rgba(16, 31, 51, 0.85) 100%),
    linear-gradient(90deg, var(--surface-dark) 0%, var(--primary-navy) 100%);
  border-bottom: 1px solid rgba(212, 175, 55, 0.25);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 2.5rem;
  align-items: start;
}

.page-about .about-hero__content {
  min-width: 0;
}

.page-about .about-hero__eyebrow {
  margin: 1.25rem 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  color: var(--primary-gold);
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  margin: 0 0 1.25rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  line-height: 1.22;
  color: var(--text-light);
}

.page-about .about-hero__lead {
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.85;
  color: rgba(245, 247, 250, 0.88);
  margin: 0 0 2rem;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  padding: 1.25rem 0;
  border-top: 1px solid rgba(212, 175, 55, 0.2);
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.page-about .about-hero__stat-num {
  font-family: var(--font-mono);
  font-size: 1.65rem;
  color: var(--primary-gold);
  line-height: 1.1;
}

.page-about .about-hero__stat-label {
  font-family: var(--font-head);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.page-about .about-hero__toc {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 0.9rem;
}

.page-about .about-hero__toc-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.page-about .about-hero__toc-item {
  position: relative;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-light);
  text-decoration: none;
  padding-bottom: 2px;
  transition: color var(--transition);
}

.page-about .about-hero__toc-item::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--primary-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.page-about .about-hero__toc-item:hover {
  color: var(--primary-gold);
}

.page-about .about-hero__toc-item:hover::after {
  transform: scaleX(1);
}

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

.page-about .about-hero__media::before {
  content: "";
  position: absolute;
  inset: auto 0 0 auto;
  width: 62%;
  height: 18%;
  background: var(--primary-gold);
  opacity: 0.75;
  z-index: 1;
  clip-path: polygon(12% 0, 100% 0, 88% 100%, 0 100%);
}

.page-about .about-hero__img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
  width: 100%;
  border-radius: var(--radius-lg);
  filter: saturate(1.05) contrast(1.05);
}

/* ===== 品牌起点 ===== */
.page-about .about-origin {
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

.page-about .about-origin__lead {
  font-family: var(--font-head);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  line-height: 1.8;
  color: var(--text-light);
  margin: 2rem 0 1rem;
}

.page-about .about-origin__paragraph {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(245, 247, 250, 0.84);
  margin: 0 0 1.5rem;
}

.page-about .about-origin__quote {
  margin: 2.25rem 0 1.75rem;
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--primary-gold);
  background: linear-gradient(90deg, rgba(212, 175, 55, 0.1) 0%, rgba(212, 175, 55, 0.01) 100%);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-light);
}

.page-about .about-origin__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.page-about .about-origin__tags .data-chip {
  background: rgba(27, 42, 71, 0.6);
  border: 1px solid rgba(212, 175, 55, 0.35);
  color: var(--text-light);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* ===== 发展里程碑 ===== */
.page-about .about-milestones {
  background:
    linear-gradient(180deg, var(--surface-dark) 0%, var(--surface-mid) 100%);
  padding-block: clamp(3.5rem, 8vw, 6rem);
  position: relative;
}

.page-about .about-milestones::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-gold) 0%, var(--accent-green) 50%, var(--accent-red) 100%);
  opacity: 0.55;
}

.page-about .about-timeline {
  position: relative;
  margin-top: 2.5rem;
}

.page-about .about-timeline__svg {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 14px;
  width: 2px;
  transform: translateX(-50%);
  z-index: 0;
}

.page-about .about-timeline__svg line {
  stroke: var(--line-gold);
  stroke-width: 1;
  opacity: 0.45;
}

.page-about .about-timeline__item {
  position: relative;
  width: 100%;
  padding-left: 3.25rem;
  margin-bottom: 1.5rem;
  z-index: 1;
}

.page-about .about-timeline__node {
  position: absolute;
  left: 14px;
  top: 1.25rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary-gold);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.2);
  transform: translateX(-50%);
}

.page-about .about-timeline__card {
  background: rgba(16, 31, 51, 0.72);
  border: 1px solid rgba(212, 175, 55, 0.28);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.4rem;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.page-about .about-timeline__card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-gold);
  background: rgba(27, 42, 71, 0.92);
}

.page-about .about-timeline__phase {
  display: block;
  font-size: 0.78rem;
  color: var(--primary-gold);
  letter-spacing: 0.14em;
  margin-bottom: 0.4rem;
}

.page-about .about-timeline__card h3 {
  font-family: var(--font-head);
  font-size: 1.15rem;
  color: var(--text-light);
  margin: 0 0 0.5rem;
}

.page-about .about-timeline__card p {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(245, 247, 250, 0.75);
  margin: 0;
}

.page-about .about-milestones__figure {
  margin: 3rem 0 0;
  text-align: center;
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: var(--radius-lg);
  padding: 1rem;
  background: rgba(16, 31, 51, 0.5);
}

.page-about .about-milestones__img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-about .about-milestones__figure figcaption {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== 数据服务理念 ===== */
.page-about .about-philosophy {
  padding-block: clamp(3.5rem, 8vw, 6rem);
  background:
    radial-gradient(circle at 12% 20%, rgba(42, 157, 143, 0.1) 0%, transparent 34%),
    var(--primary-navy);
}

.page-about .about-philosophy__grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.25rem;
}

.page-about .about-philosophy__panel {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  border: 1px solid transparent;
  transition: transform var(--transition), border-color var(--transition);
}

.page-about .about-philosophy__panel:hover {
  transform: translateY(-5px);
}

.page-about .about-philosophy__panel--old {
  background: linear-gradient(145deg, var(--surface-dark) 0%, var(--surface-mid) 100%);
  border-color: rgba(212, 175, 55, 0.5);
}

.page-about .about-philosophy__panel--new {
  background: linear-gradient(145deg, var(--surface-mid) 0%, rgba(42, 157, 143, 0.2) 120%);
  border-color: rgba(42, 157, 143, 0.5);
}

.page-about .about-philosophy__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.page-about .about-philosophy__panel--old .about-philosophy__tag {
  color: var(--primary-gold);
  background: rgba(212, 175, 55, 0.12);
}

.page-about .about-philosophy__panel--new .about-philosophy__tag {
  color: var(--accent-green);
  background: rgba(42, 157, 143, 0.12);
}

.page-about .about-philosophy__panel h3 {
  font-family: var(--font-head);
  font-size: 1.2rem;
  color: var(--text-light);
  margin: 0 0 1rem;
}

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

.page-about .about-philosophy__list li {
  position: relative;
  padding-left: 1.6rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.82);
}

.page-about .about-philosophy__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: currentColor;
}

.page-about .about-philosophy__panel--old .about-philosophy__list li::before {
  color: var(--primary-gold);
}

.page-about .about-philosophy__panel--new .about-philosophy__list li::before {
  color: var(--accent-green);
}

.page-about .about-philosophy__note {
  margin-top: 2rem;
  padding: 1.1rem 1.4rem;
  border-radius: var(--radius);
  background: rgba(27, 42, 71, 0.65);
  border: 1px solid rgba(160, 168, 184, 0.18);
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(245, 247, 250, 0.82);
}

/* ===== 团队与组织 ===== */
.page-about .about-team {
  background: linear-gradient(160deg, var(--surface-mid) 0%, var(--surface-dark) 100%);
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

.page-about .about-team__grid {
  display: grid;
  gap: 2.5rem;
  margin-top: 2.25rem;
  align-items: center;
}

.page-about .about-team__lead {
  font-family: var(--font-head);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.85;
  color: var(--text-light);
  margin: 0 0 1.75rem;
}

.page-about .about-team__roles {
  list-style: none;
  padding: 0;
  margin: 0 0 1.75rem;
  display: grid;
  gap: 0.85rem;
}

.page-about .about-team__role {
  display: grid;
  grid-template-columns: 2rem 1fr;
  grid-template-rows: auto auto;
  column-gap: 1rem;
  padding: 1rem 1.25rem;
  background: rgba(16, 31, 51, 0.66);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: var(--radius);
  transition: border-color var(--transition), background var(--transition);
}

.page-about .about-team__role:hover {
  border-color: rgba(212, 175, 55, 0.55);
  background: rgba(27, 42, 71, 0.85);
}

.page-about .about-team__role-num {
  grid-row: 1 / 3;
  font-size: 1rem;
  color: var(--primary-gold);
  padding-top: 0.2rem;
}

.page-about .about-team__role-name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-light);
}

.page-about .about-team__role-desc {
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.65;
  color: rgba(245, 247, 250, 0.7);
}

.page-about .about-team__note {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.85;
  color: rgba(245, 247, 250, 0.75);
  margin: 0;
}

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

.page-about .about-team__visual::after {
  content: "";
  position: absolute;
  left: -0.75rem;
  bottom: -0.75rem;
  width: 45%;
  height: 22%;
  background: linear-gradient(135deg, var(--accent-red) 0%, var(--primary-gold) 100%);
  opacity: 0.25;
  z-index: 0;
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

.page-about .about-team__img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-lg);
  position: relative;
  z-index: 1;
}

/* ===== 行业认可与合作 ===== */
.page-about .about-recognition {
  background:
    linear-gradient(180deg, rgba(16, 31, 51, 0.6) 0%, rgba(11, 29, 58, 0.98) 100%),
    var(--primary-navy);
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

.page-about .about-recognition__grid {
  display: grid;
  gap: 1.15rem;
  margin-top: 2.25rem;
}

.page-about .about-recognition__item {
  position: relative;
  background: rgba(27, 42, 71, 0.68);
  border: 1px solid rgba(160, 168, 184, 0.16);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.6rem;
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition);
}

.page-about .about-recognition__item:hover {
  transform: translateY(-4px);
  border-color: rgba(212, 175, 55, 0.5);
}

.page-about .about-recognition__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary-gold) 0%, var(--accent-green) 100%);
  opacity: 0.6;
}

.page-about .about-recognition__mark {
  display: block;
  font-size: 0.82rem;
  color: var(--primary-gold);
  margin-bottom: 0.85rem;
}

.page-about .about-recognition__item h3 {
  font-family: var(--font-head);
  font-size: 1.1rem;
  color: var(--text-light);
  margin: 0 0 0.6rem;
}

.page-about .about-recognition__item p {
  font-family: var(--font-body);
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(245, 247, 250, 0.72);
  margin: 0;
}

.page-about .about-recognition__cta {
  margin-top: 2.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-about .about-recognition__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 992px) {
  .page-about .about-hero {
    padding-block: calc(var(--header-h) + 3rem) 5rem;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 4rem;
    align-items: center;
  }

  .page-about .about-hero__img {
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
  }

  .page-about .about-timeline__svg {
    left: 50%;
  }

  .page-about .about-timeline__item {
    width: 50%;
    padding: 0 3.5rem;
    margin-bottom: 2.5rem;
  }

  .page-about .about-timeline__item--left {
    margin-left: 0;
    text-align: right;
  }

  .page-about .about-timeline__item--right {
    margin-right: 0;
    margin-left: auto;
    text-align: left;
  }

  .page-about .about-timeline__node {
    left: 100%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline__item--right .about-timeline__node {
    left: 0;
    transform: translateX(-50%);
  }

  .page-about .about-philosophy__grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    gap: 4rem;
  }

  .page-about .about-team__roles {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-milestones__figure img {
    width: 600px;
    margin-inline: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
  }

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

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

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