/* ===== 页面专属 CSS：品牌档案 ===== */
.page-about {
  /* 自定义变量 */
  --about-index-width: 200px;
  --about-gap: var(--space-xl);
  --about-panel-min-height: 320px;
  --about-line-color: var(--color-gold);
  --about-bg-tint: rgba(211, 47, 47, 0.035);
  display: block;
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md) var(--space-2xl);
  background-color: var(--color-white);
  position: relative;
}

/* 面包屑 */
.page-about .breadcrumb {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-gray);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-red-overlay);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}
.page-about .breadcrumb a {
  color: var(--color-red);
  text-decoration: none;
  transition: color var(--transition);
}
.page-about .breadcrumb a:hover {
  color: var(--color-dark-red);
}
.page-about .breadcrumb span {
  color: var(--color-gray);
}

/* ---------- 顶部英雄区 ---------- */
.page-about .about-hero {
  position: relative;
  margin-bottom: var(--space-2xl);
  padding: var(--space-lg) 0;
  background: linear-gradient(135deg, var(--color-black) 0%, #2a2a2a 100%);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 24px,
    rgba(212, 175, 55, 0.06) 24px,
    rgba(212, 175, 55, 0.06) 25px
  );
  pointer-events: none;
}
.page-about .about-hero__inner {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  position: relative;
  z-index: 1;
}
.page-about .about-hero__image {
  flex-shrink: 0;
  width: 240px;
}
.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-elevated);
  object-fit: cover;
}
.page-about .about-hero__text {
  flex: 1;
  min-width: 0;
}
.page-about .about-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-white);
  margin: 0 0 var(--space-sm);
  line-height: 1.1;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.page-about .about-hero__subtitle {
  font-family: var(--font-body);
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: var(--color-gold);
  margin: 0 0 var(--space-md);
  letter-spacing: 0.04em;
  font-weight: 500;
}
.page-about .about-hero__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.page-about .about-hero__meta-line {
  flex: 1;
  height: 1px;
  background: var(--color-gold);
  opacity: 0.4;
}
.page-about .about-hero__meta-label {
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--color-gold);
  letter-spacing: 0.08em;
  white-space: nowrap;
}

/* ---------- 主区域：索引 + 面板 ---------- */
.page-about .about-tabs {
  display: flex;
  gap: var(--about-gap);
  position: relative;
  margin-bottom: var(--space-2xl);
  align-items: flex-start;
}

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

/* ---------- 左侧索引 ---------- */
.page-about .about-index {
  width: var(--about-index-width);
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--space-lg) + 60px);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.page-about .about-index__label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-md);
  background: var(--color-white);
  border: 1px solid transparent;
  border-left: 3px solid var(--color-gray);
  border-radius: 0 var(--radius) var(--radius) 0;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.9rem;
  color: var(--color-black);
  position: relative;
  user-select: none;
}
.page-about .about-index__label:hover {
  border-left-color: var(--color-red);
  background: var(--color-red-light);
  color: var(--color-red);
}
.page-about .about-index__num {
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--color-gray);
  min-width: 1.6em;
  transition: color var(--transition);
}
.page-about .about-index__text {
  flex: 1;
  min-width: 0;
}
.page-about .about-index__line {
  display: block;
  width: 16px;
  height: 1px;
  background: var(--color-gray);
  opacity: 0.3;
  transition: all var(--transition);
}

/* ---------- 索引高亮（radio:checked + :has） ---------- */
.page-about:has(#tab-about-1:checked) .about-index__label[for="tab-about-1"],
.page-about:has(#tab-about-2:checked) .about-index__label[for="tab-about-2"],
.page-about:has(#tab-about-3:checked) .about-index__label[for="tab-about-3"] {
  border-left-color: var(--color-red);
  background: var(--color-red-overlay);
  color: var(--color-red);
  box-shadow: 0 0 0 1px rgba(211,47,47,0.08);
}
.page-about:has(#tab-about-1:checked) .about-index__label[for="tab-about-1"] .about-index__num,
.page-about:has(#tab-about-2:checked) .about-index__label[for="tab-about-2"] .about-index__num,
.page-about:has(#tab-about-3:checked) .about-index__label[for="tab-about-3"] .about-index__num {
  color: var(--color-red);
}
.page-about:has(#tab-about-1:checked) .about-index__label[for="tab-about-1"] .about-index__line,
.page-about:has(#tab-about-2:checked) .about-index__label[for="tab-about-2"] .about-index__line,
.page-about:has(#tab-about-3:checked) .about-index__label[for="tab-about-3"] .about-index__line {
  width: 32px;
  background: var(--color-red);
  opacity: 0.7;
}

/* ---------- 右侧面板 ---------- */
.page-about .about-panels {
  flex: 1;
  min-width: 0;
  position: relative;
}

/* 面板切换：radio:checked ~ .about-panels .about-panel[data-radio] */
.page-about .about-panel {
  display: none;
  animation: aboutFadeIn 0.4s ease;
}
@keyframes aboutFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.page-about #tab-about-1:checked ~ .about-panels .about-panel[data-radio="tab-about-1"],
.page-about #tab-about-2:checked ~ .about-panels .about-panel[data-radio="tab-about-2"],
.page-about #tab-about-3:checked ~ .about-panels .about-panel[data-radio="tab-about-3"] {
  display: block;
}

/* 面板内容包装 */
.page-about .about-panel__content {
  background: var(--color-white);
  border: 1px solid rgba(0,0,0,0.04);
  border-radius: var(--radius);
  padding: var(--space-xl);
  box-shadow: var(--shadow-card);
  position: relative;
  min-height: var(--about-panel-min-height);
}
.page-about .about-panel__content::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-red), var(--color-gold), var(--color-red));
  border-radius: var(--radius) var(--radius) 0 0;
}
.page-about .about-panel__title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-black);
  margin: 0 0 var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-red-overlay);
  position: relative;
}
.page-about .about-panel__title::after {
  content: "";
  position: absolute;
  bottom: -2px; left: 0;
  width: 60px;
  height: 2px;
  background: var(--color-gold);
}
.page-about .about-panel__text {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: #333;
  margin: 0 0 var(--space-lg);
}
.page-about .about-panel__text:last-child {
  margin-bottom: 0;
}

/* 品牌理念额外 */
.page-about .about-panel__extra {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
  padding: var(--space-md) 0;
  border-top: 1px solid var(--color-red-overlay);
  border-bottom: 1px solid var(--color-red-overlay);
}
.page-about .about-panel__extra-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-black);
  font-weight: 500;
}
.page-about .about-panel__extra-icon {
  color: var(--color-gold);
  font-size: 0.7rem;
}

/* 面板内图片 */
.page-about .about-panel__image {
  margin-top: var(--space-lg);
  max-width: 300px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.page-about .about-panel__image img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 服务定位列表 */
.page-about .about-panel__list {
  list-style: none;
  margin: 0 0 var(--space-lg);
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.page-about .about-panel__list-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.5;
  color: #333;
  padding: var(--space-sm) var(--space-md);
  background: var(--about-bg-tint);
  border-radius: var(--radius);
  border-left: 2px solid var(--color-gold);
}
.page-about .about-panel__list-icon {
  color: var(--color-red);
  font-size: 0.85rem;
  flex-shrink: 0;
  margin-top: 0.1em;
}
.page-about .about-panel__link-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-red-overlay);
}

/* 按钮覆写 */
.page-about .btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius);
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
  line-height: 1.4;
}
.page-about .btn--outline {
  background: transparent;
  border: 2px solid var(--color-red);
  color: var(--color-red);
}
.page-about .btn--outline:hover {
  background: var(--color-red);
  color: var(--color-white);
}
.page-about .btn--gold {
  background: var(--color-gold);
  border: 2px solid var(--color-gold);
  color: var(--color-black);
}
.page-about .btn--gold:hover {
  background: #c49f2f;
  border-color: #c49f2f;
  color: var(--color-black);
}

/* 背景介绍网格 */
.page-about .about-panel__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}
.page-about .about-panel__grid-text {
  min-width: 0;
}
.page-about .about-panel__grid-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.page-about .about-panel__grid-image img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-panel__icp {
  font-family: var(--font-data);
  font-size: 0.85rem;
  color: var(--color-red);
  background: var(--color-red-overlay);
  padding: 0.1em 0.6em;
  border-radius: 2px;
  white-space: nowrap;
}
.page-about .about-panel__contact {
  list-style: none;
  margin: var(--space-md) 0 var(--space-sm);
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}
.page-about .about-panel__contact-item {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: #333;
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}
.page-about .about-panel__contact-label {
  font-weight: 600;
  color: var(--color-black);
  min-width: 5em;
}
.page-about .about-panel__contact-link {
  color: var(--color-red);
  text-decoration: none;
  transition: color var(--transition);
}
.page-about .about-panel__contact-link:hover {
  color: var(--color-dark-red);
  text-decoration: underline;
}
.page-about .about-panel__note {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-gray);
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px dashed var(--color-gray);
}

/* ---------- 底部品牌延伸 ---------- */
.page-about .about-footer {
  margin-top: var(--space-2xl);
  padding: var(--space-lg) 0;
  text-align: center;
  border-top: 1px solid var(--color-red-overlay);
}
.page-about .about-footer__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}
.page-about .about-footer__line {
  flex: 1;
  max-width: 120px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
}
.page-about .about-footer__tagline {
  font-family: var(--font-heading);
  font-size: clamp(1.1rem, 2.5vw, 1.6rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-black);
  margin: 0;
  white-space: nowrap;
}
.page-about .about-footer__trust {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-gray);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ===== 移动端优先适配 ===== */
@media (max-width: 767px) {
  .page-about {
    padding: var(--space-md) var(--space-sm) var(--space-xl);
  }
  .page-about .about-hero__inner {
    flex-direction: column;
    text-align: center;
    padding: 0 var(--space-md);
  }
  .page-about .about-hero__image {
    width: 160px;
  }
  .page-about .about-hero__meta {
    justify-content: center;
  }
  .page-about .about-hero__meta-line {
    flex: 0 1 60px;
  }

  /* 移动端：切换为上下布局，索引变水平标签 */
  .page-about .about-tabs {
    flex-direction: column;
    gap: var(--space-lg);
  }
  .page-about .about-index {
    width: 100%;
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-xs);
  }
  .page-about .about-index__label {
    flex: 1 1 auto;
    min-width: 100px;
    padding: var(--space-sm) var(--space-md);
    border-left-width: 0;
    border-bottom: 3px solid var(--color-gray);
    border-radius: var(--radius) var(--radius) 0 0;
    justify-content: center;
    text-align: center;
  }
  .page-about .about-index__label:hover {
    border-left-width: 0;
    border-bottom-color: var(--color-red);
  }
  .page-about .about-index__num {
    display: none;
  }
  .page-about .about-index__line {
    display: none;
  }
  .page-about:has(#tab-about-1:checked) .about-index__label[for="tab-about-1"],
  .page-about:has(#tab-about-2:checked) .about-index__label[for="tab-about-2"],
  .page-about:has(#tab-about-3:checked) .about-index__label[for="tab-about-3"] {
    border-left-width: 0;
    border-bottom-color: var(--color-red);
    background: var(--color-red-overlay);
  }

  .page-about .about-panel__content {
    padding: var(--space-lg) var(--space-md);
  }
  .page-about .about-panel__grid {
    grid-template-columns: 1fr;
  }
  .page-about .about-panel__grid-image {
    order: -1;
    max-width: 400px;
    margin: 0 auto;
  }
  .page-about .about-panel__image {
    max-width: 200px;
    margin-left: auto;
    margin-right: auto;
  }
  .page-about .about-panel__link-wrap {
    flex-direction: column;
    align-items: stretch;
  }
  .page-about .about-panel__link-wrap .btn {
    text-align: center;
  }
  .page-about .about-footer__inner {
    flex-direction: column;
    gap: var(--space-sm);
  }
  .page-about .about-footer__line {
    max-width: 80px;
  }
  .page-about .about-footer__tagline {
    white-space: normal;
  }
}

/* 桌面微调 */
@media (min-width: 768px) and (max-width: 1023px) {
  .page-about .about-index {
    width: 160px;
  }
  .page-about .about-index__label {
    padding: var(--space-sm) var(--space-sm);
    font-size: 0.8rem;
  }
  .page-about .about-panel__content {
    padding: var(--space-lg);
  }
  .page-about .about-panel__grid {
    gap: var(--space-md);
  }
}

/* 减少动效 */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-panel {
    animation: none;
  }
  .page-about .about-index__label,
  .page-about .btn,
  .page-about .breadcrumb a {
    transition: none;
  }
}