.page-about {
  --about-tl-x: 150px;
  overflow-x: hidden;
  color: var(--text-body);
  font-family: var(--font-body);
}

/* ===== Hero 首屏 ===== */
.about-hero {
  position: relative;
  background:
    radial-gradient(ellipse 880px 460px at 82% 18%, rgba(0, 210, 106, 0.16), transparent 62%),
    radial-gradient(ellipse 700px 360px at 12% 86%, rgba(255, 110, 0, 0.12), transparent 58%),
    linear-gradient(142deg, #0B0E14 0%, #14213D 62%, #0E2B3C 100%);
  color: var(--text-inverse);
  padding: calc(var(--header-h) + 48px) 0 0;
  overflow: hidden;
}

.about-hero::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 88px;
  background: linear-gradient(180deg, transparent, rgba(11, 14, 20, 0.35));
  pointer-events: none;
}

.about-hero .breadcrumb {
  margin-bottom: 24px;
}

.about-hero .breadcrumb-link {
  color: rgba(255, 255, 255, 0.62);
}

.about-hero .breadcrumb-list {
  color: rgba(255, 255, 255, 0.82);
}

.about-hero-grid {
  display: grid;
  gap: 32px;
  align-items: center;
  padding: 24px 0 48px;
}

.about-hero-title {
  font-family: var(--font-head);
  font-size: clamp(34px, 5.6vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  transform: skewX(-5deg);
  margin: 12px 0 20px;
  color: var(--text-inverse);
}

.about-hero-lead {
  max-width: 540px;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.82);
  margin: 0;
}

.about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.about-hero-media {
  border-radius: 16px;
  overflow: hidden;
}

.about-hero-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
}

.about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  padding-bottom: 40px;
}

.about-hero-stat {
  padding: 18px 16px;
  background: rgba(255, 255, 255, 0.08);
  border-left: 3px solid var(--green);
  border-radius: 0 12px 12px 0;
  backdrop-filter: blur(6px);
}

.about-hero-stat .stat-number {
  display: block;
  font-family: var(--font-head);
  font-size: var(--fs-28);
  line-height: 1.1;
  color: var(--green);
}

.about-hero-stat .stat-label {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-14);
  color: rgba(255, 255, 255, 0.78);
}

/* ===== 品牌历程 ===== */
.about-story {
  position: relative;
  background: linear-gradient(180deg, var(--light-bg) 0%, var(--light-bg) 46%, var(--dark-teal) 46.1%, var(--dark-teal) 100%);
  padding: 72px 0;
}

.about-story::after {
  content: '';
  position: absolute;
  right: -80px;
  bottom: 40px;
  width: 260px;
  height: 80px;
  background: repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.12) 0 2px, transparent 2px 12px);
  transform: rotate(-12deg);
  pointer-events: none;
}

.about-story .section-header {
  margin-bottom: 52px;
}

.about-timeline {
  position: relative;
  display: grid;
  gap: 40px;
}

.about-timeline-track {
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(
    180deg,
    rgba(20, 33, 61, 0.22) 0%,
    rgba(20, 33, 61, 0.22) 52%,
    rgba(255, 255, 255, 0.3) 100%
  );
}

.about-timeline-node {
  position: relative;
  padding-left: 48px;
}

.about-timeline-node::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 10px;
  width: 19px;
  height: 19px;
  background: var(--green);
  border: 3px solid #fff;
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(0, 210, 106, 0.28);
}

.about-timeline-meta {
  margin-bottom: 10px;
}

.about-timeline-year {
  display: inline-block;
  font-family: var(--font-head);
  font-size: var(--fs-20);
  color: var(--dark-blue);
  transform: skewX(-6deg);
  letter-spacing: -0.01em;
}

.about-timeline-card {
  background: #fff;
  padding: 24px 22px;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.about-timeline-node:hover .about-timeline-card {
  transform: translateY(-4px);
  box-shadow: 0 18px 32px rgba(20, 33, 61, 0.14);
}

.about-timeline-title {
  font-family: var(--font-head);
  font-size: var(--fs-20);
  margin-bottom: 10px;
  color: var(--text-body);
}

.about-timeline-desc {
  font-size: var(--fs-14);
  line-height: 1.7;
  color: #465364;
  margin: 0;
}

.about-timeline-node--v2::before {
  width: 23px;
  height: 23px;
  left: 5px;
  top: 12px;
  background: var(--orange);
  box-shadow: 0 0 0 6px rgba(255, 110, 0, 0.32), 0 0 24px rgba(255, 110, 0, 0.6);
}

.about-timeline-node--v2 .about-timeline-year {
  color: var(--yellow);
  font-size: var(--fs-28);
}

.about-timeline-node--v2 .about-timeline-card {
  background: #0F3B36;
  padding: 32px 28px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.about-timeline-node--v2 .about-timeline-title {
  color: #fff;
  font-size: var(--fs-28);
}

.about-timeline-node--v2 .about-timeline-desc {
  color: rgba(255, 255, 255, 0.82);
}

.about-timeline-node--v2:hover .about-timeline-card {
  box-shadow: 0 22px 44px rgba(10, 61, 62, 0.4);
}

/* ===== 我们的使命 ===== */
.about-mission {
  background:
    radial-gradient(ellipse 720px 380px at 80% 20%, rgba(0, 210, 106, 0.18), transparent 60%),
    linear-gradient(135deg, #0A3D3E 0%, #0B4A4B 100%);
  padding: 80px 0 64px;
  color: #fff;
}

.about-mission-inner {
  max-width: 820px;
}

.about-mission-heading {
  font-family: var(--font-head);
  font-size: var(--fs-40);
  transform: skewX(-5deg);
  margin: 12px 0 28px;
  color: #fff;
}

.about-mission-statement {
  font-family: var(--font-head);
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.2;
  transform: skewX(-6deg);
  color: #fff;
  margin: 0 0 32px;
  letter-spacing: -0.01em;
}

.about-mission-text {
  max-width: 620px;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.86);
  margin: 0;
}

/* ===== 数据与内容体系 ===== */
.about-data {
  background:
    radial-gradient(ellipse 640px 320px at 12% 0%, rgba(255, 110, 0, 0.12), transparent 60%),
    linear-gradient(155deg, #3B1F5E 0%, #28163F 100%);
  color: #fff;
  padding: 72px 0 64px;
}

.about-data .section-title {
  color: #fff;
}

.about-data .section-subtitle {
  color: rgba(255, 255, 255, 0.78);
}

.about-data-grid {
  display: grid;
  gap: 32px;
  align-items: center;
}

.about-data-media {
  border-radius: 14px;
  overflow: hidden;
}

.about-data-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.about-data-stat-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 24px;
}

.about-data-stat-item {
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  border-top: 3px solid var(--green);
}

.about-data-stat-item .stat-number {
  display: block;
  font-family: var(--font-head);
  font-size: var(--fs-28);
  color: var(--yellow);
}

.about-data-stat-item .stat-label {
  display: block;
  font-size: var(--fs-14);
  color: rgba(255, 255, 255, 0.7);
  margin-top: 4px;
}

.about-data-lead {
  font-size: var(--fs-16);
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.86);
  margin: 0 0 20px;
}

.about-data .link-arrow {
  color: var(--green);
  font-size: var(--fs-14);
}

.about-content-system {
  display: grid;
  gap: 14px;
  margin-top: 48px;
}

.about-content-item {
  padding: 20px 18px;
  background: rgba(255, 255, 255, 0.08);
  border-left: 4px solid var(--orange);
  border-radius: 0 12px 12px 0;
}

.about-content-item h3 {
  font-family: var(--font-head);
  font-size: var(--fs-20);
  color: #fff;
  margin-bottom: 6px;
}

.about-content-item p {
  font-size: var(--fs-14);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.75);
  margin: 0;
}

/* ===== 团队与合作 ===== */
.about-team {
  background: var(--light-bg);
  padding: 72px 0 64px;
}

.about-team-grid {
  display: grid;
  gap: 32px;
  align-items: start;
}

.about-team-block {
  margin-bottom: 32px;
}

.about-team-block h3 {
  font-family: var(--font-head);
  font-size: var(--fs-20);
  margin-bottom: 10px;
  color: var(--dark-blue);
  position: relative;
  padding-left: 16px;
}

.about-team-block h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.32em;
  width: 6px;
  height: 0.78em;
  background: var(--orange);
  transform: skewX(-16deg);
}

.about-team-block p {
  font-size: var(--fs-16);
  line-height: 1.75;
  color: #3A4656;
  margin: 0;
}

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

.about-team-list li {
  position: relative;
  padding: 10px 0 10px 28px;
  font-size: var(--fs-16);
  color: #3A4656;
  border-bottom: 1px solid var(--line-gray);
}

.about-team-list li:last-child {
  border-bottom: 0;
}

.about-team-list li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 16px;
  width: 10px;
  height: 10px;
  background: var(--green);
  transform: rotate(45deg);
  border-radius: 2px;
}

.about-team-media {
  overflow: hidden;
}

.about-team-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 14px;
}

.about-team-note {
  font-size: var(--fs-14);
  color: var(--text-muted);
  margin: 14px 0 0;
}

/* ===== 信任声明 ===== */
.about-trust {
  background: var(--dark-bg);
  padding: 56px 0;
}

.about-trust-inner {
  background: linear-gradient(135deg, #1D2030, #262A3E);
  padding: 28px 26px;
  display: grid;
  gap: 20px;
}

.about-trust-text {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.78);
  margin: 0;
}

.about-trust-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
}

.about-trust-links a {
  font-size: var(--fs-14);
  color: var(--yellow);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 213, 0, 0.4);
  transition: border-color var(--t-fast), color var(--t-fast);
}

.about-trust-links a:hover,
.about-trust-links a:focus-visible {
  color: #fff;
  border-bottom-color: #fff;
}

/* ===== 桌面端 ≥900px ===== */
@media (min-width: 900px) {
  .about-hero {
    padding-top: calc(var(--header-h) + 64px);
  }

  .about-hero-grid {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    padding-bottom: 64px;
  }

  .about-hero-stat {
    padding: 22px 20px;
  }

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

  .about-timeline-grid {
    grid-template-columns: var(--about-tl-x) 1fr;
  }

  .about-timeline-node {
    padding-left: 0;
    display: grid;
    grid-template-columns: var(--about-tl-x) 1fr;
    gap: 24px;
    align-items: start;
  }

  .about-timeline-track {
    left: calc(var(--about-tl-x) + 10px);
  }

  .about-timeline-node::before {
    left: calc(var(--about-tl-x) + 1px);
    top: 12px;
  }

  .about-timeline-node--v2::before {
    left: -1px;
  }

  .about-timeline-meta {
    margin-bottom: 0;
    text-align: right;
    padding-top: 24px;
  }

  .about-timeline-card {
    margin-right: 8%;
  }

  .about-timeline-node--v2 .about-timeline-card {
    margin-right: 0;
    margin-left: calc(var(--about-tl-x) + 24px);
    max-width: 820px;
  }

  .about-mission {
    padding: 96px 0 80px;
  }

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

  .about-content-system {
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }

  .about-team-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 56px;
  }

  .about-trust-inner {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 32px;
    padding: 32px 36px;
  }
}

/* ===== 大屏 ≥1200px ===== */
@media (min-width: 1200px) {
  .about-hero {
    padding-top: calc(var(--header-h) + 96px);
  }

  .about-hero-title {
    font-size: 56px;
  }

  .about-timeline-node--v2 .about-timeline-card {
    padding: 40px 36px;
  }

  .about-timeline-node--v2 .about-timeline-desc {
    max-width: 660px;
  }
}