.page-about {
  --about-accent-font: 'Barlow Condensed', 'DIN Condensed', 'PingFang SC', sans-serif;
  --about-radius-cut: 14px;
  overflow-x: hidden;
}

.page-about .container {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 20px;
}

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

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--font-caption);
  color: var(--text-sub);
  margin-bottom: 28px;
}

.page-about .crumb-link {
  color: var(--text-sub);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--transition-standard);
}

.page-about .crumb-link:hover {
  color: var(--green);
}

.page-about .crumb-current {
  color: var(--text-main);
  font-weight: 600;
}

.page-about .about-section-index {
  display: inline-block;
  font-family: var(--accent-font);
  font-size: var(--font-index);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  background: rgba(46, 139, 87, 0.08);
  padding: 6px 12px;
  border-left: 3px solid var(--green);
  margin-bottom: 18px;
}

.page-about .about-section-index--light {
  color: #b8e6cf;
  background: rgba(255, 255, 255, 0.08);
  border-left-color: var(--orange);
}

.page-about .about-section-title {
  font-family: var(--heading-font);
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  line-height: 1.18;
  color: var(--text-main);
  margin: 0 0 22px;
}

.page-about .about-section-title--light {
  color: #ffffff;
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(circle at 85% 20%, rgba(46, 139, 87, 0.12) 0, transparent 42%),
    linear-gradient(135deg, #f9fbfc 0%, #eef2f5 100%);
  padding-top: 110px;
  padding-bottom: 90px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -100px;
  width: 320px;
  height: 130px;
  background: var(--gradient-main);
  transform: rotate(16deg);
  opacity: 0.9;
  z-index: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 20%;
  left: -140px;
  width: 260px;
  height: 500px;
  background: rgba(255, 140, 0, 0.06);
  transform: rotate(-14deg);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
}

.page-about .about-hero__eyebrow {
  font-family: var(--accent-font);
  font-size: var(--font-h2);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--deep-blue);
  display: block;
  margin-bottom: 12px;
}

.page-about .about-hero__title {
  font-family: var(--heading-font);
  font-size: clamp(34px, 7vw, 56px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin: 0 0 22px;
}

.page-about .about-hero__lead {
  font-family: var(--body-font);
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-sub);
  max-width: 560px;
  margin: 0 0 28px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-about .btn-accent {
  background: var(--orange);
  border-color: var(--orange);
  color: #fff;
  font-weight: 700;
  padding: 14px 26px;
  border-radius: var(--radius-cut);
  text-decoration: none;
  display: inline-block;
  box-shadow: 0 8px 24px rgba(255, 140, 0, 0.28);
  transition: transform var(--transition-standard), box-shadow var(--transition-standard), background var(--transition-standard);
}

.page-about .btn-accent:hover {
  background: #ff7a00;
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(255, 140, 0, 0.34);
}

.page-about .about-hero__note {
  font-size: var(--font-caption);
  color: var(--text-sub);
  max-width: 280px;
  border-left: 3px solid var(--green);
  padding-left: 12px;
}

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

.page-about .about-preview-item {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 150px;
  padding: 18px 16px;
  border-radius: var(--about-radius-cut);
  text-decoration: none;
  overflow: hidden;
  transition: transform var(--transition-standard), box-shadow var(--transition-standard);
}

.page-about .about-preview-item::after {
  content: "";
  position: absolute;
  right: -20px;
  bottom: -20px;
  width: 64px;
  height: 64px;
  border: 3px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .about-preview-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(22, 33, 45, 0.12);
}

.page-about .about-preview-item--green {
  background: var(--green);
  color: #fff;
}

.page-about .about-preview-item--deep {
  background: var(--deep-blue);
  color: #fff;
}

.page-about .about-preview-item--white {
  background: var(--card-white);
  color: var(--text-main);
  border: 1px solid var(--border-line);
}

.page-about .about-preview-item--orange {
  background: var(--orange);
  color: #fff;
}

.page-about .about-preview-item__index {
  font-family: var(--accent-font);
  font-size: 32px;
  font-weight: 800;
  line-height: 1;
  opacity: 0.9;
}

.page-about .about-preview-item__title {
  font-family: var(--heading-font);
  font-size: 18px;
  font-weight: 800;
  margin-top: 20px;
}

.page-about .about-preview-item__meta {
  font-size: 13px;
  letter-spacing: 0.04em;
  opacity: 0.85;
  margin-top: 6px;
}

.page-about .about-hero__slant {
  position: absolute;
  bottom: -36px;
  left: -10%;
  width: 62%;
  height: 68px;
  background: var(--orange);
  transform: skewX(-14deg);
  opacity: 0.95;
  z-index: 0;
}

/* ===== Story ===== */
.page-about .about-story {
  padding: 88px 0 80px;
  background: var(--light-gray);
  position: relative;
}

.page-about .about-story::before {
  content: "";
  position: absolute;
  top: 40px;
  right: 6%;
  width: 96px;
  height: 96px;
  border: 2px dashed rgba(46, 139, 87, 0.22);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 139, 87, 0.08) 0 18%, transparent 20%);
}

.page-about .about-story__inner {
  max-width: 760px;
  margin-left: 0;
  border-left: 4px solid var(--green);
  padding-left: 26px;
}

.page-about .about-story__text {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-main);
  margin: 0 0 18px;
}

.page-about .about-story__more {
  margin-top: 26px;
  padding: 18px 20px;
  background: var(--card-white);
  border-right: 6px solid var(--orange);
  border-radius: var(--radius-cut);
  color: var(--text-main);
  font-size: 15px;
  line-height: 1.6;
}

/* ===== Milestones ===== */
.page-about .about-milestones {
  padding: 88px 0 96px;
  background: var(--card-white);
}

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

.page-about .about-timeline {
  position: relative;
  padding-top: 40px;
}

.page-about .about-timeline__curve {
  position: absolute;
  top: 56px;
  left: 0;
  width: 100%;
  height: 120px;
  pointer-events: none;
  z-index: 0;
  display: none;
}

.page-about .about-timeline__axis {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-timeline__node {
  border-left: 3px solid var(--green);
  padding: 6px 0 6px 18px;
  background: transparent;
}

.page-about .about-timeline__summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .about-timeline__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__dot {
  width: 16px;
  height: 16px;
  background: var(--green);
  border: 3px solid var(--card-white);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--green);
  flex: 0 0 auto;
}

.page-about .about-timeline__year {
  font-family: var(--accent-font);
  font-size: 24px;
  font-weight: 800;
  color: var(--deep-blue);
  line-height: 1;
}

.page-about .about-timeline__tag {
  font-size: var(--font-caption);
  font-weight: 700;
  color: var(--green);
  background: rgba(46, 139, 87, 0.08);
  padding: 4px 10px;
  border-radius: 999px;
}

.page-about .about-timeline__detail {
  margin-top: 12px;
  padding: 14px 16px;
  background: var(--light-gray);
  border-radius: var(--radius-cut);
  font-size: var(--font-caption);
  line-height: 1.6;
  color: var(--text-main);
  border-left: 3px solid var(--deep-blue);
}

/* ===== Data ===== */
.page-about .about-data {
  position: relative;
  background: linear-gradient(135deg, #1a3b60 0%, #0f2c4a 100%);
  padding: 96px 0 88px;
  overflow: hidden;
}

.page-about .about-data__watermark {
  position: absolute;
  top: 28px;
  right: -12px;
  font-family: var(--heading-font);
  font-size: clamp(110px, 18vw, 240px);
  font-weight: 900;
  line-height: 1;
  color: rgba(184, 230, 207, 0.07);
  letter-spacing: -0.04em;
  user-select: none;
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-about .about-data__head {
  position: relative;
  z-index: 1;
  margin-bottom: 40px;
}

.page-about .about-data__lead {
  color: #b8cae0;
  font-size: 16px;
  line-height: 1.6;
  margin: 0;
}

.page-about .about-data__layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

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

.page-about .about-stat {
  padding: 22px 18px;
  border-radius: var(--about-radius-cut);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform var(--transition-standard), box-shadow var(--transition-standard);
}

.page-about .about-stat:hover {
  transform: translateY(-3px);
}

.page-about .about-stat--green {
  background: var(--green);
  box-shadow: 0 10px 26px rgba(46, 139, 87, 0.34);
}

.page-about .about-stat--white {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.page-about .about-stat__num {
  font-family: var(--accent-font);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
}

.page-about .about-stat__label {
  font-size: var(--font-caption);
  color: #b8cae0;
}

.page-about .about-stat--green .about-stat__label {
  color: #eafff3;
}

.page-about .about-data__media {
  margin: 0;
}

.page-about .about-data__img {
  width: 100%;
  border-radius: var(--about-radius-cut);
  border: 2px solid rgba(255, 255, 255, 0.14);
  object-fit: cover;
}

.page-about .about-data__caption {
  font-size: var(--font-caption);
  color: #b8cae0;
  margin-top: 10px;
  line-height: 1.5;
  text-align: left;
}

.page-about .about-data__footnote {
  position: relative;
  z-index: 1;
  margin-top: 36px;
  padding: 18px 22px;
  background: rgba(255, 140, 0, 0.12);
  border-left: 4px solid var(--orange);
  border-radius: var(--radius-cut);
  color: #dcf0e7;
  font-size: var(--font-caption);
  line-height: 1.6;
}

/* ===== Team ===== */
.page-about .about-team {
  padding: 96px 0;
  background: var(--light-gray);
}

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

.page-about .about-team__media {
  margin: 0;
  position: relative;
}

.page-about .about-team__image {
  width: 100%;
  border-radius: var(--about-radius-cut);
  object-fit: cover;
  box-shadow: 0 16px 38px rgba(22, 33, 45, 0.14);
}

.page-about .about-team__badge {
  position: absolute;
  right: 16px;
  bottom: 16px;
  background: var(--deep-blue);
  color: #fff;
  font-family: var(--accent-font);
  font-weight: 800;
  font-size: var(--font-h2);
  letter-spacing: 0.02em;
  padding: 10px 16px;
  border-radius: var(--radius-cut);
  border-bottom: 4px solid var(--orange);
}

.page-about .about-team__lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-sub);
  margin-bottom: 26px;
}

.page-about .about-team__skills {
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-team__skills li {
  position: relative;
  padding: 14px 16px 14px 22px;
  background: var(--card-white);
  border-left: 4px solid var(--green);
  border-radius: var(--radius-cut);
  font-size: var(--font-caption);
  line-height: 1.6;
  color: var(--text-main);
  font-weight: 500;
}

.page-about .btn-outline {
  display: inline-block;
  padding: 12px 22px;
  border: 2px solid var(--deep-blue);
  border-radius: var(--radius-cut);
  color: var(--deep-blue);
  font-weight: 700;
  text-decoration: none;
  transition: background var(--transition-standard), color var(--transition-standard), transform var(--transition-standard);
}

.page-about .btn-outline:hover {
  background: var(--deep-blue);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== Credential ===== */
.page-about .about-credential {
  padding: 96px 0;
  background: var(--card-white);
}

.page-about .about-credential__head {
  margin-bottom: 44px;
}

.page-about .about-credential__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-credential__card {
  position: relative;
  padding: 26px 24px 24px;
  background: var(--light-gray);
  border-radius: var(--about-radius-cut);
  border-top: 4px solid var(--green);
  overflow: hidden;
  transition: transform var(--transition-standard), box-shadow var(--transition-standard), border-color var(--transition-standard);
}

.page-about .about-credential__card::after {
  content: "";
  position: absolute;
  right: -28px;
  bottom: -28px;
  width: 90px;
  height: 90px;
  background: rgba(30, 63, 102, 0.04);
  transform: rotate(22deg);
}

.page-about .about-credential__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(22, 33, 45, 0.08);
  border-top-color: var(--orange);
}

.page-about .about-credential__num {
  font-family: var(--accent-font);
  font-size: 34px;
  font-weight: 800;
  color: var(--deep-blue);
  opacity: 0.25;
  line-height: 1;
  display: block;
  margin-bottom: 16px;
}

.page-about .about-credential__card h3 {
  font-family: var(--heading-font);
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
  margin: 0 0 10px;
}

.page-about .about-credential__card p {
  font-size: var(--font-caption);
  line-height: 1.65;
  color: var(--text-sub);
  margin: 0;
}

/* ===== Vision ===== */
.page-about .about-vision {
  position: relative;
  padding: 110px 0;
  overflow: hidden;
}

.page-about .about-vision__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-vision__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(15, 44, 74, 0.92) 0%, rgba(15, 44, 74, 0.68) 50%, rgba(15, 44, 74, 0.35) 100%);
}

.page-about .about-vision__content {
  position: relative;
  z-index: 1;
  max-width: 640px;
}

.page-about .about-vision__text {
  color: #e8f2fc;
  font-size: 16px;
  line-height: 1.75;
  margin: 0 0 18px;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 860px) {
  .page-about .about-hero {
    padding-top: 140px;
    padding-bottom: 120px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
    align-items: center;
  }

  .page-about .about-hero__title {
    font-size: var(--font-display);
  }

  .page-about .about-preview-item {
    min-height: 180px;
    padding: 24px 20px;
  }

  .page-about .about-preview-item__title {
    font-size: 22px;
  }

  .page-about .about-story__inner {
    margin-left: 8%;
  }

  .page-about .about-timeline {
    padding-top: 56px;
  }

  .page-about .about-timeline__curve {
    display: block;
  }

  .page-about .about-timeline__axis {
    flex-direction: row;
    align-items: flex-start;
    gap: 0;
  }

  .page-about .about-timeline__node {
    flex: 1;
    border-left: none;
    padding: 0;
    text-align: center;
  }

  .page-about .about-timeline__summary {
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }

  .page-about .about-timeline__dot {
    margin-bottom: 6px;
  }

  .page-about .about-timeline__detail {
    text-align: left;
    margin-top: 14px;
  }

  .page-about .about-data__layout {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 44px;
  }

  .page-about .about-stat {
    padding: 26px 20px;
  }

  .page-about .about-team__layout {
    grid-template-columns: 0.95fr 1.05fr;
    gap: 52px;
    align-items: center;
  }

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

  .page-about .about-credential__card {
    padding: 32px 28px 28px;
  }

  .page-about .about-vision {
    padding: 150px 0;
  }
}

@media (min-width: 1200px) {
  .page-about .about-data__watermark {
    right: 40px;
  }
}