/* ===== 品牌档案页 · 页面专属样式 ===== */
.page-about {
  --about-green-soft: rgba(0, 255, 136, 0.1);
  --about-blue-soft: rgba(0, 191, 255, 0.08);
  --about-grey-line: rgba(148, 163, 184, 0.18);
  --about-panel: #111827;
  --about-panel-lift: #1f2937;
  position: relative;
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  overflow-x: clip;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-heading);
  font-weight: 900;
  color: var(--color-text-primary);
}

.page-about p,
.page-about li,
.page-about blockquote {
  font-family: var(--font-body);
}

.page-about .breadcrumb {
  margin: 0 0 2rem;
}

.page-about [id="story"],
.page-about [id="timeline"],
.page-about [id="data"],
.page-about [id="commitment"] {
  scroll-margin-top: 4.5rem;
}

/* ===== 页首刊头区 ===== */
.page-about__hero {
  position: relative;
  padding: 2rem 0 1.25rem;
  overflow: hidden;
}

.page-about__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(0, 255, 136, 0.08) 0%, transparent 38%),
    linear-gradient(220deg, rgba(0, 191, 255, 0.06) 0%, transparent 46%);
  pointer-events: none;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 38%;
  background: repeating-linear-gradient(-45deg, rgba(0, 255, 136, 0.04) 0 2px, transparent 2px 10px);
  clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about__hero-shell {
  position: relative;
  z-index: 1;
}

.page-about__hero-grid {
  display: block;
}

.page-about__hero-index {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.page-about__hero-index-num {
  font-size: 4rem;
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 2px var(--color-accent-green);
  letter-spacing: -0.04em;
}

.page-about__hero-index-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  line-height: 1.4;
  letter-spacing: 0.18em;
  color: var(--color-text-secondary);
}

.page-about__hero-eyebrow {
  margin: 0 0 0.75rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  letter-spacing: 0.14em;
  color: var(--color-accent-green);
  text-transform: uppercase;
}

.page-about__hero-main h1 {
  margin: 0;
  font-size: clamp(2.2rem, 8vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.page-about__hero-lead {
  margin: 1rem 0 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  max-width: 42rem;
}

.page-about__hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

/* ===== 页内目录 ===== */
.page-about__toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem 2rem;
  margin-top: 2.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--about-grey-line);
}

.page-about__toc-link {
  position: relative;
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.page-about__toc-num {
  margin-right: 0.375rem;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: var(--color-accent-green);
}

.page-about__toc-link:hover,
.page-about__toc-link.is-active {
  color: var(--color-accent-green);
}

/* ===== 区块标题统一 ===== */
.page-about__section-head {
  margin-bottom: 1.5rem;
}

/* ===== 品牌故事 ===== */
.page-about__story {
  padding-top: clamp(2.5rem, 5vw, 4rem);
}

.page-about__story-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.75rem;
}

.page-about__story-frame {
  position: relative;
  width: 100%;
}

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

.page-about__story-credit {
  margin-top: 0.625rem;
}

.page-about__story-body p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: #d1d5db;
}

.page-about__story-body strong {
  color: var(--color-accent-green);
  font-weight: 700;
}

.page-about__story-quote {
  margin: 1.5rem 0 0;
  padding: 1.1rem 1.4rem;
  border-left: 4px solid var(--color-accent-blue);
  background: linear-gradient(120deg, var(--about-blue-soft), transparent 80%);
  color: var(--color-text-primary);
  font-size: 1rem;
  line-height: 1.85;
  font-weight: 700;
}

.page-about__story-more {
  margin-top: 1.25rem;
  font-size: 0.9375rem;
}

/* ===== 发展历程 ===== */
.page-about__timeline {
  padding-top: clamp(2.5rem, 5vw, 4rem);
}

.page-about__timeline-list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  position: relative;
}

.page-about__timeline-list::before {
  content: "";
  position: absolute;
  left: 2.125rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent-green), var(--color-accent-blue));
  opacity: 0.45;
}

.page-about__timeline-item {
  position: relative;
  padding-left: 5.25rem;
  padding-bottom: 2rem;
}

.page-about__timeline-item:last-child {
  padding-bottom: 0.5rem;
}

.page-about__timeline-node {
  position: absolute;
  left: 0;
  top: 0;
  width: 4.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.375rem;
}

.page-about__timeline-ring {
  width: 0.875rem;
  height: 0.875rem;
  border-radius: 999px;
  background: var(--color-bg-primary);
  border: 3px solid var(--color-accent-green);
  box-shadow:
    0 0 0 4px rgba(0, 255, 136, 0.12),
    0 0 18px rgba(0, 255, 136, 0.35);
}

.page-about__timeline-year {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.06em;
}

.page-about__timeline-panel {
  position: relative;
  min-width: 0;
  background: linear-gradient(180deg, rgba(0, 255, 136, 0.05), transparent 34%), #101722;
  padding: 1.2rem 1.25rem 1.2rem 1.4rem;
  clip-path: polygon(0 10px, 10px 0, calc(100% - 10px) 0, 100% 10px, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: transform var(--duration-mid) var(--ease-out);
}

.page-about__timeline-panel::before {
  content: "";
  position: absolute;
  left: 0.75rem;
  top: 0.9rem;
  bottom: 0.9rem;
  width: 3px;
  background: var(--color-accent-green);
}

.page-about__timeline-panel h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
}

.page-about__timeline-panel p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: #cbd5e1;
}

.page-about__timeline-panel:hover {
  transform: translateY(-4px);
}

.page-about__timeline-media {
  margin-top: 2.25rem;
}

.page-about__timeline-frame {
  display: block;
  width: 100%;
}

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

.page-about__media-caption {
  margin: 0.625rem 0 0;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.06em;
}

/* ===== 数据体系 ===== */
.page-about__data {
  padding-top: clamp(2.5rem, 5vw, 4rem);
}

.page-about__data-layout {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.75rem;
}

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

.page-about__data-stat {
  padding: 1.25rem 1.25rem 1.1rem;
  background: var(--about-panel);
  border: 1px solid var(--about-grey-line);
  border-top: 3px solid var(--color-accent-green);
  transition: transform var(--duration-mid) var(--ease-out), border-color var(--duration-mid) var(--ease-out);
}

.page-about__data-stat:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent-green);
}

.page-about__data-value {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--color-text-primary);
}

.page-about__data-label {
  display: block;
  margin-top: 0.375rem;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
}

.page-about__data-media {
  min-width: 0;
}

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

.page-about__data-note {
  padding: 1.25rem 1.4rem;
  background: linear-gradient(120deg, var(--about-blue-soft), transparent 90%);
  border-left: 3px solid var(--color-accent-blue);
}

.page-about__data-note p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.9;
  color: #cbd5e1;
}

.page-about__data-note strong {
  color: var(--color-accent-green);
}

.page-about__data-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-about__data-list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.875rem;
  line-height: 1.6;
  color: #d1d5db;
}

.page-about__data-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 0.625rem;
  height: 0.625rem;
  background: var(--color-accent-green);
  opacity: 0.8;
}

/* ===== 服务承诺 ===== */
.page-about__commitment {
  padding-top: clamp(2.5rem, 5vw, 4rem);
}

.page-about__commitment-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.75rem;
}

.page-about__commitment-card {
  position: relative;
  padding: 1.8rem 1.5rem 1.5rem;
  background: linear-gradient(145deg, #121a28, #0d131c);
  clip-path: polygon(0 14px, 14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: transform var(--duration-mid) var(--ease-out);
}

.page-about__commitment-card:hover {
  transform: translateY(-6px);
}

.page-about__commitment-icon {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-accent-green);
  border: 1px solid rgba(0, 255, 136, 0.5);
  padding: 0.25rem 0.625rem;
  margin-bottom: 1rem;
}

.page-about__commitment-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
}

.page-about__commitment-card p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: #cbd5e1;
}

.page-about__commitment-card strong {
  color: var(--color-accent-green);
}

/* ===== 底部收束区 ===== */
.page-about__closing {
  margin-top: 2.5rem;
  padding: 2rem 1.5rem;
  text-align: center;
  background: linear-gradient(120deg, rgba(0, 255, 136, 0.08), rgba(0, 191, 255, 0.06));
  border: 1px solid var(--about-grey-line);
}

.page-about__closing p {
  margin: 0 0 1.25rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.page-about__closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  align-items: center;
}

/* ===== 平板断点 ===== */
@media (min-width: 720px) {
  .page-about__story-grid {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 2rem;
  }

  .page-about__commitment-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .page-about__closing {
    padding: 2.5rem;
  }
}

/* ===== 桌面断点 ===== */
@media (min-width: 960px) {
  .page-about__hero {
    padding: clamp(2.5rem, 6vw, 4.5rem) 0 1.5rem;
  }

  .page-about__hero-grid {
    display: grid;
    grid-template-columns: 10.5rem 1fr;
    gap: 2rem;
    align-items: end;
  }

  .page-about__hero-index {
    margin-bottom: 0;
  }

  .page-about__hero-index-num {
    font-size: clamp(4rem, 7vw, 6rem);
  }

  .page-about__hero-main h1 {
    max-width: 22em;
  }

  .page-about__section-head {
    margin-bottom: 2rem;
  }

  /* 时间线桌面交替布局 */
  .page-about__timeline-list::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about__timeline-item {
    width: 50%;
    padding-left: 0;
    padding-right: 2.5rem;
  }

  .page-about__timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 2.5rem;
  }

  .page-about__timeline-item:nth-child(odd) .page-about__timeline-node {
    left: auto;
    right: -2.125rem;
  }

  .page-about__timeline-item:nth-child(even) .page-about__timeline-node {
    right: auto;
    left: -2.125rem;
  }

  .page-about__timeline-item:nth-child(even) .page-about__timeline-panel::before {
    left: auto;
    right: 0.75rem;
  }

  /* 数据体系桌面栅格 */
  .page-about__data-layout {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 2rem;
  }

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

  .page-about__data-note {
    grid-column: 1 / -1;
    padding: 1.5rem 1.8rem;
  }

  .page-about__data-note p {
    font-size: 0.9375rem;
  }

  .page-about__commitment-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
}

/* ===== 宽屏调整 ===== */
@media (min-width: 1200px) {
  .page-about__story-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .page-about__data-layout {
    grid-template-columns: 1.3fr 0.7fr;
  }

  .page-about__data-stat {
    padding: 1.5rem 1.75rem 1.25rem;
  }
}