/* ========== 品牌介绍页专属样式 ========== */
.page-about {
  --about-green: var(--color-neon-green);
  --about-turquoise: var(--color-turquoise);
  --about-line: rgba(0, 255, 136, 0.32);
  --about-line-soft: rgba(10, 240, 208, 0.18);
  --about-grid-line: rgba(255, 255, 255, 0.025);
  background: var(--color-space-blue);
  color: var(--color-white);
  overflow-x: hidden;
}

/* 章节骨架 */
.page-about .section {
  padding: 3.5rem 0;
  position: relative;
}

.page-about .section-heading-row {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin: 0 0 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .section-heading-row .section-index {
  font-family: var(--font-data);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--about-green);
  flex-shrink: 0;
  width: 3.5rem;
  height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid var(--about-line);
}

.page-about .section-heading-group {
  flex: 1;
}

.page-about .section-kicker {
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--about-turquoise);
  margin: 0 0 0.35rem;
}

.page-about .section-heading-row .section-heading {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.2;
  text-transform: uppercase;
  color: var(--color-white);
  margin: 0;
}

/* 面包屑深色背景适配 */
.page-about .breadcrumbs {
  color: var(--color-mid-gray);
}

.page-about .breadcrumbs a {
  color: var(--color-light-blue);
  text-decoration: none;
}

.page-about .breadcrumbs a:hover {
  color: var(--about-green);
}

.page-about .breadcrumbs-current {
  color: var(--color-white);
}

/* ========== 首屏 ========== */
.page-about .about-hero {
  padding: 2rem 0 3rem;
  position: relative;
  background-color: var(--color-space-blue);
  background-image:
    linear-gradient(var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-line) 1px, transparent 1px);
  background-size: 26px 26px;
}

.page-about .about-hero-frame {
  position: relative;
  border: 1px solid var(--about-line);
  padding: 1.75rem 1.25rem 2rem;
  margin-top: 1.75rem;
  background: linear-gradient(135deg, rgba(20, 50, 92, 0.75), rgba(11, 29, 58, 0.94));
}

.page-about .about-hero-frame::before,
.page-about .about-hero-frame::after {
  content: "";
  position: absolute;
  width: 2.25rem;
  height: 2.25rem;
  pointer-events: none;
}

.page-about .about-hero-frame::before {
  top: -1px;
  left: -1px;
  border-top: 3px solid var(--about-green);
  border-left: 3px solid var(--about-green);
}

.page-about .about-hero-frame::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 3px solid var(--about-turquoise);
  border-right: 3px solid var(--about-turquoise);
}

.page-about .about-hero-slash {
  position: absolute;
  top: 1.4rem;
  right: 2rem;
  width: 3.5rem;
  height: 2px;
  background: var(--about-turquoise);
  transform: rotate(-45deg);
  transform-origin: right center;
  opacity: 0.85;
  pointer-events: none;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 1.75rem;
}

.page-about .about-kicker {
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--about-green);
  margin: 0 0 0.85rem;
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.12;
  text-transform: uppercase;
  color: var(--color-white);
  margin: 0 0 1rem;
}

.page-about .about-h1-sub {
  display: block;
  color: var(--about-green);
  margin-top: 0.2rem;
}

.page-about .about-hero-lead {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-light-blue);
  margin: 0 0 1.25rem;
  max-width: 58ch;
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.75rem;
  margin-bottom: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.page-about .about-meta-item .data-value {
  font-family: var(--font-data);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-white);
}

.page-about .about-meta-item .data-label {
  font-size: 0.75rem;
  color: var(--color-mid-gray);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .about-hero-visual {
  height: 240px;
  overflow: hidden;
  border: 1px solid var(--about-line-soft);
}

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

/* ========== 01 品牌缘起 ========== */
.page-about .about-origin {
  background: var(--color-space-blue);
}

.page-about .about-origin-grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-origin-copy p {
  margin: 0 0 1rem;
  color: var(--color-light-gray);
  font-size: 0.98rem;
}

.page-about .about-origin-copy strong {
  color: var(--about-green);
}

.page-about .about-origin-copy a {
  color: var(--about-green);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-origin-copy a:hover {
  color: var(--about-turquoise);
}

.page-about .about-origin-meaning {
  display: grid;
  gap: 1rem;
}

.page-about .about-meaning-card {
  background: var(--color-deep-blue);
  border: 1px solid var(--about-line-soft);
  padding: 1.5rem 1.25rem;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.page-about .about-meaning-card:hover {
  border-color: var(--about-green);
  transform: translateY(-4px);
}

.page-about .about-meaning-letter {
  font-family: var(--font-data);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--about-turquoise);
  display: block;
  margin-bottom: 0.75rem;
}

.page-about .about-meaning-card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  text-transform: uppercase;
  color: var(--color-white);
  margin: 0 0 0.5rem;
}

.page-about .about-meaning-card p {
  font-size: 0.875rem;
  color: var(--color-mid-gray);
  margin: 0;
}

/* ========== 02 发展里程碑 ========== */
.page-about .about-milestone {
  background: linear-gradient(180deg, var(--color-space-blue), var(--color-deep-blue) 120%);
}

.page-about .about-timeline {
  position: relative;
  max-width: 820px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 2.1rem;
  top: 0.35rem;
  bottom: 0.35rem;
  width: 1px;
  background: linear-gradient(to bottom, var(--about-green), var(--about-turquoise) 60%, rgba(10, 240, 208, 0.12));
}

.page-about .about-timeline-item {
  position: relative;
  padding-left: 4.5rem;
  padding-bottom: 2.25rem;
}

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

.page-about .about-timeline-marker {
  position: absolute;
  left: 1.1rem;
  top: 0.05rem;
  width: 2rem;
  height: 2rem;
  background: var(--color-space-blue);
  border: 1px solid var(--about-green);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-data);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--about-green);
  transform: translateX(-50%);
  z-index: 1;
}

.page-about .about-timeline-body h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  text-transform: uppercase;
  color: var(--color-white);
  margin: 0 0 0.5rem;
}

.page-about .about-timeline-body p {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--color-light-gray);
  margin: 0;
}

/* ========== 03 数据体系 ========== */
.page-about .about-data {
  position: relative;
  background-color: var(--color-space-blue);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 22px 22px;
}

.page-about .about-section-lead {
  font-size: 1rem;
  color: var(--color-light-blue);
  max-width: 70ch;
  margin: -0.5rem 0 2rem;
}

.page-about .about-data-grid {
  display: grid;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.page-about .about-metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

.page-about .about-metric {
  background: var(--color-deep-blue);
  border: 1px solid var(--about-line-soft);
  padding: 1.1rem 0.9rem;
  min-height: 88px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.3rem;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.page-about .about-metric:hover {
  border-color: var(--about-green);
  transform: translateY(-3px);
}

.page-about .about-metric .data-value {
  font-family: var(--font-data);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--about-green);
}

.page-about .about-metric .data-label {
  font-size: 0.78rem;
  color: var(--color-mid-gray);
}

.page-about .about-data-copy h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  text-transform: uppercase;
  color: var(--color-white);
  margin: 0 0 0.75rem;
}

.page-about .about-data-copy p {
  font-size: 0.95rem;
  color: var(--color-light-gray);
  margin: 0 0 0.9rem;
}

.page-about .about-data-copy a {
  color: var(--about-green);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-data-copy a:hover {
  color: var(--about-turquoise);
}

.page-about .about-data-flow {
  display: grid;
  gap: 2rem;
  margin-top: 1.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-flow-visual img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--about-line-soft);
}

.page-about .about-flow-list {
  display: grid;
  gap: 1.1rem;
}

.page-about .about-flow-step {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
}

.page-about .about-flow-num {
  font-family: var(--font-data);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-space-blue);
  background: var(--about-turquoise);
  width: 1.75rem;
  height: 1.75rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .about-flow-step h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  text-transform: uppercase;
  color: var(--color-white);
  margin: 0 0 0.25rem;
}

.page-about .about-flow-step p {
  font-size: 0.88rem;
  color: var(--color-mid-gray);
  margin: 0;
}

/* ========== 04 团队与使命 ========== */
.page-about .about-team {
  background: linear-gradient(180deg, var(--color-deep-blue), var(--color-space-blue));
}

.page-about .about-team-grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-team-copy h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  text-transform: uppercase;
  color: var(--color-white);
  margin: 0 0 0.75rem;
}

.page-about .about-team-copy p {
  font-size: 0.95rem;
  color: var(--color-light-gray);
  margin: 0 0 1rem;
}

.page-about .about-team-copy a {
  color: var(--about-green);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-team-copy a:hover {
  color: var(--about-turquoise);
}

.page-about .about-team-quote {
  margin: 1.5rem 0 0;
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--about-green);
  background: rgba(11, 29, 58, 0.72);
}

.page-about .about-team-quote p {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-white);
  margin: 0;
}

.page-about .about-team-visual img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--about-line-soft);
}

/* ========== 中等屏幕 ========== */
@media (min-width: 640px) {
  .page-about .section {
    padding: 4rem 0;
  }

  .page-about .about-metrics-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-hero-visual {
    height: 300px;
  }
}

/* ========== 桌面屏幕 ========== */
@media (min-width: 960px) {
  .page-about .section {
    padding: 5rem 0;
  }

  .page-about .section-heading-row {
    margin-bottom: 2.5rem;
  }

  .page-about .about-hero {
    padding: 3rem 0 4.5rem;
  }

  .page-about .about-hero-frame {
    padding: 2.5rem 2.5rem 2.75rem;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 3rem;
  }

  .page-about .about-hero-copy h1 {
    font-size: 2.75rem;
  }

  .page-about .about-hero-visual {
    height: 380px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 4rem;
    align-items: start;
  }

  .page-about .about-data {
    background-attachment: fixed;
  }

  .page-about .about-data-grid {
    grid-template-columns: 0.95fr 1.05fr;
    gap: 3rem;
    align-items: center;
  }

  .page-about .about-data-flow {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 3.5rem;
    align-items: center;
  }

  .page-about .about-team-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 4rem;
    align-items: center;
  }

  .page-about .about-team-quote {
    margin-top: 2rem;
  }
}

/* ========== 减少动效 ========== */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero-slash {
    display: none;
  }
}