/* ===== 品牌介绍页专属样式 .page-about ===== */

.page-about {
  --about-hero-min-height: 70vh;
  --about-tab-accent: var(--赛博橙);
  --about-map-shape-color: var(--戈壁黄);
  --about-timeline-color: var(--霓虹绿);
  --about-panel-gap: 2.5rem;
  display: block;
  width: 100%;
}

/* ---------- 首屏海报 ---------- */
.page-about .about-hero {
  position: relative;
  min-height: var(--about-hero-min-height);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--深色背景);
  isolation: isolate;
}

.page-about .about-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 40% 50%;
  z-index: 0;
  opacity: 0.55;
}

.page-about .about-hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(135deg, rgba(26,26,26,0.85) 0%, rgba(58,107,143,0.35) 60%, rgba(200,169,110,0.20) 100%);
}

.page-about .about-hero-accent {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 45%;
  height: 30%;
  z-index: 1;
  background: var(--赛博橙);
  clip-path: polygon(100% 0, 0% 100%, 100% 100%);
  opacity: 0.18;
}

.page-about .about-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 3rem 1rem;
  width: 100%;
}

.page-about .about-hero-kicker {
  display: inline-block;
  font-family: var(--正文字体);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--雪白);
  background: rgba(58,107,143,0.55);
  padding: 0.3rem 1.2rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  backdrop-filter: blur(4px);
}

.page-about .about-hero-title {
  font-family: var(--标题字体);
  font-size: clamp(4.5rem, 22vw, 12rem);
  font-weight: 900;
  line-height: 0.9;
  color: var(--戈壁黄);
  margin: 0 0 0.2rem;
  letter-spacing: -0.04em;
  text-shadow: 4px 4px 0 rgba(0,0,0,0.4);
  word-break: keep-all;
}

.page-about .about-hero-subtitle {
  font-family: var(--数字字体);
  font-size: clamp(2rem, 8vw, 5rem);
  font-weight: 700;
  color: var(--霓虹绿);
  margin: 0 0 0.5rem;
  letter-spacing: 0.15em;
  text-shadow: 0 0 20px rgba(0,230,118,0.3);
}

.page-about .about-hero-desc {
  font-family: var(--正文字体);
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  color: var(--雪白);
  max-width: 480px;
  margin: 0 auto 1.5rem;
  line-height: 1.6;
  opacity: 0.92;
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.page-about .about-hero-meta-item {
  font-family: var(--数字字体);
  font-size: 0.85rem;
  color: var(--天山蓝);
  background: rgba(245,245,240,0.12);
  padding: 0.35rem 1rem;
  border-radius: var(--radius);
  border: 1px solid rgba(58,107,143,0.3);
  backdrop-filter: blur(2px);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding: 1.2rem 1rem 2rem;
  font-family: var(--正文字体);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.page-about .breadcrumb-link {
  color: var(--天山蓝);
  text-decoration: none;
  transition: color 0.2s;
}

.page-about .breadcrumb-link:hover {
  color: var(--戈壁黄);
}

.page-about .breadcrumb-sep {
  color: var(--天山蓝);
  opacity: 0.5;
}

.page-about .breadcrumb-current {
  color: var(--正文灰);
  font-weight: 600;
}

/* ---------- 标签页系统 ---------- */
.page-about .about-tabs {
  padding: 2.5rem 1rem 3rem;
}

.page-about .about-tab-radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

.page-about .about-tab-labels {
  display: flex;
  gap: 0.35rem;
  background: var(--浅色背景);
  border-radius: var(--radius);
  padding: 0.4rem;
  margin-bottom: 2.5rem;
  border: 1px solid rgba(58,107,143,0.15);
  flex-wrap: wrap;
  justify-content: center;
}

.page-about .about-tab-label {
  flex: 1 1 auto;
  text-align: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--正文字体);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--正文灰);
  border-radius: calc(var(--radius) - 2px);
  cursor: pointer;
  transition: background 0.25s, color 0.25s, box-shadow 0.25s;
  background: transparent;
  user-select: none;
  min-width: 100px;
}

.page-about .about-tab-label:hover {
  background: rgba(58,107,143,0.08);
}

#tab-philosophy:checked ~ .about-tab-labels label[for="tab-philosophy"],
#tab-region:checked ~ .about-tab-labels label[for="tab-region"],
#tab-version:checked ~ .about-tab-labels label[for="tab-version"] {
  background: var(--天山蓝);
  color: var(--雪白);
  box-shadow: 0 2px 12px rgba(58,107,143,0.25);
}

/* 面板切换 */
.page-about .about-tab-panel {
  display: none;
  animation: aboutFadeIn 0.4s ease;
}

#tab-philosophy:checked ~ #panel-philosophy,
#tab-region:checked ~ #panel-region,
#tab-version:checked ~ #panel-version {
  display: block;
}

@keyframes aboutFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 面板通用 ---------- */
.page-about .about-panel-inner {
  display: flex;
  flex-direction: column;
  gap: var(--about-panel-gap);
  align-items: center;
}

.page-about .about-panel-text {
  flex: 1 1 50%;
}

.page-about .about-panel-heading {
  font-family: var(--标题字体);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--正文灰);
  margin: 0 0 1rem;
  line-height: 1.2;
  position: relative;
  display: inline-block;
}

.page-about .about-panel-heading::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 60%;
  height: 4px;
  background: var(--赛博橙);
  border-radius: 2px;
}

.page-about .about-panel-desc {
  font-family: var(--正文字体);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--正文灰);
  margin: 0 0 1rem;
  max-width: 580px;
}

.page-about .about-panel-desc strong {
  color: var(--天山蓝);
  font-weight: 600;
}

.page-about .about-panel-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-about .about-panel-visual {
  flex: 1 1 40%;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.page-about .about-panel-visual--full {
  flex: 1 1 100%;
  width: 100%;
}

.page-about .about-panel-img {
  width: 100%;
  max-width: 400px;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 32px rgba(0,0,0,0.08);
}

/* ---------- 面板二：地域优势（地图） ---------- */
.page-about .about-map-wrapper {
  width: 100%;
  max-width: 460px;
  position: relative;
}

.page-about .about-map-shape {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1.15;
  background: var(--戈壁黄);
  clip-path: polygon(
    50% 2%, 58% 3%, 68% 8%, 78% 12%, 85% 18%,
    90% 28%, 88% 35%, 82% 42%, 85% 50%, 80% 58%,
    72% 65%, 63% 72%, 55% 76%, 48% 72%, 42% 65%,
    35% 58%, 30% 48%, 28% 38%, 32% 28%, 38% 20%,
    42% 12%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s;
  cursor: default;
}

.page-about .about-map-shape::after {
  content: '新 疆';
  font-family: var(--标题字体);
  font-size: clamp(1.4rem, 5vw, 2.8rem);
  font-weight: 700;
  color: var(--雪白);
  letter-spacing: 0.2em;
  opacity: 0.6;
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.page-about .about-map-shape:hover {
  background: var(--天山蓝);
}

.page-about .about-map-tooltip {
  position: absolute;
  font-family: var(--正文字体);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--雪白);
  background: var(--深色背景);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.25s;
  pointer-events: none;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}

.page-about .about-map-tooltip[data-region="altay"] { top: 8%; left: 55%; }
.page-about .about-map-tooltip[data-region="ili"] { top: 22%; left: 20%; }
.page-about .about-map-tooltip[data-region="aksu"] { top: 45%; left: 35%; }
.page-about .about-map-tooltip[data-region="hetian"] { top: 65%; left: 40%; }
.page-about .about-map-tooltip[data-region="hami"] { top: 30%; left: 82%; }
.page-about .about-map-tooltip[data-region="urumqi"] { top: 35%; left: 58%; }

.page-about .about-map-shape:hover .about-map-tooltip {
  opacity: 1;
}

.page-about .about-map-legend {
  display: flex;
  gap: 1.2rem;
  justify-content: center;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.page-about .about-legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--正文字体);
  font-size: 0.8rem;
  color: var(--正文灰);
}

.page-about .about-legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ---------- 面板三：版本历程（时间线） ---------- */
.page-about .about-panel-inner--column {
  flex-direction: column;
}

.page-about .about-timeline {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
  padding-bottom: 0.5rem;
  position: relative;
}

.page-about .about-timeline-track {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  min-width: max-content;
  padding: 1.5rem 0.5rem;
  position: relative;
}

.page-about .about-timeline-track::before {
  content: '';
  position: absolute;
  top: 2.2rem;
  left: 1rem;
  right: 1rem;
  height: 3px;
  background: linear-gradient(90deg, var(--天山蓝), var(--赛博橙), var(--霓虹绿));
  border-radius: 2px;
}

.page-about .about-timeline-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  position: relative;
  min-width: 110px;
}

.page-about .about-timeline-node::before {
  content: '';
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--天山蓝);
  border: 3px solid var(--雪白);
  box-shadow: 0 0 0 2px var(--天山蓝);
  order: -1;
  transition: transform 0.2s, background 0.2s;
}

.page-about .about-timeline-node:hover::before {
  transform: scale(1.3);
  background: var(--赛博橙);
}

.page-about .about-timeline-version {
  font-family: var(--数字字体);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--天山蓝);
}

.page-about .about-timeline-label {
  font-family: var(--正文字体);
  font-size: 0.85rem;
  color: var(--正文灰);
  text-align: center;
}

.page-about .about-timeline-img {
  width: 100%;
  max-width: 800px;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-top: 1.5rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}

/* ---------- 信任声明 ---------- */
.page-about .about-trust {
  background: var(--深色背景);
  padding: 3.5rem 1rem;
  margin-top: 1rem;
}

.page-about .about-trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.page-about .about-trust-item {
  text-align: center;
  padding: 1.5rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(245,245,240,0.04);
  border: 1px solid rgba(58,107,143,0.2);
  transition: border-color 0.3s, background 0.3s;
}

.page-about .about-trust-item:hover {
  border-color: var(--戈壁黄);
  background: rgba(200,169,110,0.06);
}

.page-about .about-trust-icon {
  display: inline-block;
  font-family: var(--数字字体);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--赛博橙);
  margin-bottom: 0.75rem;
  line-height: 1;
}

.page-about .about-trust-title {
  font-family: var(--标题字体);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--雪白);
  margin: 0 0 0.5rem;
}

.page-about .about-trust-text {
  font-family: var(--正文字体);
  font-size: 0.9rem;
  color: rgba(245,245,240,0.75);
  line-height: 1.6;
  max-width: 280px;
  margin: 0 auto;
}

/* ===== 桌面端媒体查询 ===== */
@media (min-width: 768px) {
  .page-about .about-hero-content {
    text-align: left;
    padding: 4rem 2rem;
  }

  .page-about .about-hero-title {
    margin-left: -0.04em;
  }

  .page-about .about-hero-desc {
    margin: 0 0 1.5rem;
  }

  .page-about .about-hero-meta {
    justify-content: flex-start;
  }

  .page-about .about-hero-accent {
    width: 30%;
    height: 50%;
    opacity: 0.25;
  }

  .page-about .about-tab-labels {
    gap: 0.5rem;
    padding: 0.5rem;
    margin-bottom: 3rem;
  }

  .page-about .about-tab-label {
    flex: 0 1 auto;
    padding: 0.85rem 2.2rem;
    font-size: 1.05rem;
  }

  .page-about .about-panel-inner {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-about .about-panel-inner--reversed {
    flex-direction: row-reverse;
  }

  .page-about .about-panel-inner--column {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-about .about-panel-heading {
    font-size: 2.4rem;
  }

  .page-about .about-panel-desc {
    font-size: 1.05rem;
  }

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

  .page-about .about-trust-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }

  .page-about .about-trust {
    padding: 4rem 2rem;
  }

  .page-about .breadcrumb {
    padding: 1.5rem 2rem 2.5rem;
  }

  .page-about .about-tabs {
    padding: 3rem 2rem 4rem;
  }

  .page-about .about-map-shape {
    aspect-ratio: 1 / 1.1;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    min-height: 75vh;
  }

  .page-about .about-hero-title {
    font-size: clamp(6rem, 18vw, 14rem);
  }

  .page-about .about-panel-inner {
    gap: 4rem;
  }

  .page-about .about-trust-grid {
    gap: 3rem;
  }
}

/* ===== 窄屏溢出防护 ===== */
@media (max-width: 420px) {
  .page-about .about-hero-title {
    font-size: 4rem;
  }

  .page-about .about-hero-subtitle {
    font-size: 1.6rem;
  }

  .page-about .about-tab-label {
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
    min-width: 70px;
  }

  .page-about .about-panel-heading {
    font-size: 1.5rem;
  }

  .page-about .about-panel-links .btn {
    font-size: 0.85rem;
    padding: 0.5rem 1rem;
  }

  .page-about .about-timeline-node {
    min-width: 80px;
  }

  .page-about .about-timeline-version {
    font-size: 0.9rem;
  }
}