/* ===== 品牌档案页面 (page-about) ===== */
.page-about {
  --about-gap: clamp(2rem, 4vw, 4rem);
  --about-section-spacing: clamp(3rem, 6vw, 6rem);
  --about-timeline-dot-size: 1.25rem;
  --about-timeline-line-width: 3px;
  --about-max-text: 620px;
  display: flex;
  flex-direction: column;
  gap: var(--about-section-spacing);
  padding: var(--space-md) var(--space-sm);
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* 面包屑 */
.page-about__breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-caption);
  color: var(--color-muted);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid rgba(138, 155, 184, 0.15);
  margin-bottom: var(--space-sm);
}
.page-about__breadcrumb a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.page-about__breadcrumb a:hover,
.page-about__breadcrumb a:focus-visible {
  color: var(--color-accent);
}
.page-about__breadcrumb-sep {
  color: var(--color-muted);
  opacity: 0.5;
}
.page-about__breadcrumb-current {
  color: var(--color-white);
  font-weight: 500;
}

/* 通用区标签 */
.page-about__section-label {
  display: inline-block;
  font-family: var(--font-header);
  font-weight: 800;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  border-left: 3px solid var(--color-accent);
  padding-left: 0.75rem;
  margin-bottom: var(--space-sm);
  line-height: 1.4;
}

/* ===== 品牌故事区（对开布局） ===== */
.page-about__story {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  position: relative;
}
@media (min-width: 768px) {
  .page-about__story {
    grid-template-columns: 1fr 1.4fr;
    align-items: start;
  }
}

.page-about__story-left {
  position: relative;
  padding-top: var(--space-sm);
}
.page-about__story-title {
  font-family: var(--font-header);
  font-weight: 800;
  font-size: var(--text-h1);
  line-height: 1.15;
  color: var(--color-white);
  margin: 0 0 var(--space-md);
  letter-spacing: -0.02em;
}
.page-about__story-decor {
  position: absolute;
  top: -1rem;
  right: 0;
  width: 80px;
  height: 80px;
  pointer-events: none;
  opacity: 0.6;
}
@media (min-width: 768px) {
  .page-about__story-decor {
    top: -0.5rem;
    right: 2rem;
  }
}

.page-about__story-right {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.page-about__story-text {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--color-white);
  max-width: var(--about-max-text);
  margin: 0;
}
.page-about__story-text strong.accent {
  color: var(--color-accent);
  font-weight: 600;
}

.page-about__story-figure {
  margin: var(--space-sm) 0 0;
  width: 100%;
}
.page-about__story-img {
  width: 100%;
  height: auto;
  max-width: 800px;
  border-radius: 4px;
  object-fit: cover;
  aspect-ratio: 800 / 600;
  background: var(--color-card);
}
.page-about__story-figure figcaption {
  margin-top: 0.5rem;
  color: var(--color-muted);
}

/* ===== 里程碑区（时间轴） ===== */
.page-about__milestones {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
.page-about__milestones-intro {
  max-width: var(--about-max-text);
}
.page-about__milestones-heading {
  font-family: var(--font-header);
  font-weight: 800;
  font-size: var(--text-h2);
  color: var(--color-white);
  margin: 0 0 var(--space-xs);
}
.page-about__milestones-sub {
  font-family: var(--font-body);
  font-size: var(--text-body);
  color: var(--color-muted);
  margin: 0;
}

/* 时间轴容器 */
.page-about__timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  padding-left: calc(var(--about-timeline-dot-size) + var(--space-md));
}
@media (min-width: 768px) {
  .page-about__timeline {
    padding-left: calc(var(--about-timeline-dot-size) + var(--space-lg));
  }
}

/* 时间轴竖线 */
.page-about__timeline-track {
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(var(--about-timeline-dot-size) / 2);
  width: var(--about-timeline-line-width);
  background: linear-gradient(180deg, var(--color-accent) 0%, rgba(0, 229, 255, 0.1) 100%);
  border-radius: 2px;
  transform: translateX(-50%);
}
@media (min-width: 768px) {
  .page-about__timeline-track {
    left: calc(var(--about-timeline-dot-size) / 2);
  }
}

/* 时间轴条目 */
.page-about__timeline-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.page-about__timeline-dot {
  position: absolute;
  left: calc(-1 * (var(--about-timeline-dot-size) + var(--space-md) + var(--about-timeline-dot-size) / 2));
  top: 0.25rem;
  width: var(--about-timeline-dot-size);
  height: var(--about-timeline-dot-size);
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}
@media (min-width: 768px) {
  .page-about__timeline-dot {
    left: calc(-1 * (var(--about-timeline-dot-size) + var(--space-lg) + var(--about-timeline-dot-size) / 2));
  }
}
.page-about__timeline-dot-inner {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  transition: transform var(--transition);
}
.page-about__timeline-item:hover .page-about__timeline-dot-inner,
.page-about__timeline-item:focus-within .page-about__timeline-dot-inner {
  transform: scale(2);
}

.page-about__timeline-content {
  background: var(--color-card);
  padding: var(--space-md);
  border-radius: 4px;
  position: relative;
  transition: background var(--transition), box-shadow var(--transition);
}
.page-about__timeline-content:hover {
  background: rgba(26, 45, 74, 0.85);
  box-shadow: 0 4px 24px rgba(0, 229, 255, 0.08);
}

.page-about__timeline-title {
  font-family: var(--font-header);
  font-weight: 700;
  font-size: var(--text-h3);
  color: var(--color-white);
  margin: 0 0 var(--space-xs);
}
.page-about__timeline-desc {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--color-white);
  max-width: var(--about-max-text);
  margin: 0;
}

.page-about__timeline-figure {
  margin: var(--space-sm) 0 0;
  width: 100%;
  max-width: 700px;
}
.page-about__timeline-img {
  width: 100%;
  height: auto;
  aspect-ratio: 700 / 400;
  object-fit: cover;
  border-radius: 4px;
  background: var(--color-dark);
}
.page-about__timeline-figure figcaption {
  margin-top: 0.4rem;
  color: var(--color-muted);
}

/* ===== 服务承诺区 ===== */
.page-about__commitment {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  position: relative;
}
@media (min-width: 768px) {
  .page-about__commitment {
    grid-template-columns: 1.2fr 1fr;
    align-items: start;
  }
}

.page-about__commitment-left {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.page-about__commitment-heading {
  font-family: var(--font-header);
  font-weight: 800;
  font-size: var(--text-h2);
  color: var(--color-white);
  margin: 0;
  line-height: 1.2;
}
.page-about__commitment-text {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--color-white);
  max-width: var(--about-max-text);
  margin: 0;
}

.page-about__commitment-quote {
  background: var(--color-card);
  border-left: 4px solid var(--color-accent);
  padding: var(--space-md);
  margin: var(--space-sm) 0;
  border-radius: 0 4px 4px 0;
}
.page-about__commitment-quote p {
  font-family: var(--font-header);
  font-weight: 600;
  font-size: var(--text-h3);
  line-height: 1.4;
  color: var(--color-white);
  margin: 0;
  font-style: italic;
}

.page-about__commitment-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  margin-top: var(--space-sm);
}
.page-about__stat {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
}
.page-about__stat-value {
  font-family: var(--font-header);
  font-weight: 800;
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  line-height: 1;
  color: var(--color-gold);
  letter-spacing: -0.02em;
}
.page-about__stat-value.gold {
  color: var(--color-gold);
}
.page-about__stat-label {
  color: var(--color-muted);
  font-weight: 400;
  letter-spacing: 0.04em;
}

/* 右侧 */
.page-about__commitment-right {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: flex-start;
}
.page-about__commitment-figure {
  margin: 0;
  width: 100%;
  max-width: 500px;
}
.page-about__commitment-img {
  width: 100%;
  height: auto;
  aspect-ratio: 500 / 500;
  object-fit: cover;
  border-radius: 4px;
  background: var(--color-card);
}
.page-about__commitment-figure figcaption {
  margin-top: 0.4rem;
  color: var(--color-muted);
}

.page-about__commitment-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}
.page-about__commitment-links-label {
  font-family: var(--font-body);
  font-size: var(--text-caption);
  color: var(--color-muted);
  margin: 0;
  flex-basis: 100%;
}
@media (min-width: 480px) {
  .page-about__commitment-links-label {
    flex-basis: auto;
  }
}
.page-about__commitment-links .btn-ghost {
  color: var(--color-accent);
  border: 1px solid rgba(0, 229, 255, 0.3);
  background: transparent;
  padding: 0.5rem 1.25rem;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--text-body);
  text-decoration: none;
  border-radius: 2px;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.page-about__commitment-links .btn-ghost:hover,
.page-about__commitment-links .btn-ghost:focus-visible {
  background: rgba(0, 229, 255, 0.1);
  border-color: var(--color-accent);
  color: var(--color-white);
}

/* ===== 面板bevel复用增强 ===== */
.page-about .panel-bevel {
  clip-path: polygon(
    0% var(--bevel-size),
    var(--bevel-size) 0%,
    calc(100% - var(--bevel-size)) 0%,
    100% var(--bevel-size),
    100% calc(100% - var(--bevel-size)),
    calc(100% - var(--bevel-size)) 100%,
    var(--bevel-size) 100%,
    0% calc(100% - var(--bevel-size))
  );
}

/* ===== 响应式：窄屏精细调整 ===== */
@media (max-width: 480px) {
  .page-about {
    padding: var(--space-sm) var(--space-xs);
    gap: var(--space-lg);
  }
  .page-about__story-title {
    font-size: clamp(2.2rem, 10vw, 2.8rem);
  }
  .page-about__timeline {
    padding-left: calc(var(--about-timeline-dot-size) + var(--space-sm));
  }
  .page-about__timeline-dot {
    left: calc(-1 * (var(--about-timeline-dot-size) + var(--space-sm) + var(--about-timeline-dot-size) / 2));
  }
  .page-about__timeline-track {
    left: calc(var(--about-timeline-dot-size) / 2);
  }
  .page-about__commitment-stats {
    gap: var(--space-md);
  }
  .page-about__commitment-quote p {
    font-size: var(--text-body);
  }
}

/* ===== 桌面宽屏增强 ===== */
@media (min-width: 1024px) {
  .page-about {
    padding: var(--space-lg) var(--space-md);
    gap: var(--space-xl);
  }
  .page-about__story-title {
    font-size: 4rem;
  }
  .page-about__story {
    grid-template-columns: 1fr 1.6fr;
  }
  .page-about__story-left {
    position: sticky;
    top: calc(var(--header-height) + var(--space-md));
    align-self: start;
  }
  .page-about__commitment {
    grid-template-columns: 1.3fr 1fr;
  }
}