/* ═══════════════════════════════════════════
   Prototype Extensions — 新增模块组件
   严格沿用 style.css 的设计变量与节奏
   ═══════════════════════════════════════════ */

/* ── 产品实拍图容器（替代原 icon 视觉位） ── */
.product-row-visual.product-photo {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  overflow: hidden;
}
.product-row-visual.product-photo img {
  max-width: 100%;
  max-height: 380px;
  object-fit: contain;
  filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.6));
  transition: transform 0.6s var(--ease-out);
}
.product-row:hover .product-row-visual.product-photo img {
  transform: scale(1.05) translateY(-6px);
}

/* ── 参数规格条 ── */
.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
  margin: 22px 0 26px;
}
.spec-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  transition: border-color 0.3s, background 0.3s;
}
.spec-item:hover {
  border-color: var(--border-hover);
  background: rgba(255, 255, 255, 0.07);
}
.spec-value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}
.spec-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* ── 卖点清单 ── */
.check-list {
  list-style: none;
  margin: 18px 0 0;
  display: grid;
  gap: 10px;
}
.check-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
}
.check-list li i {
  color: var(--accent);
  font-size: 0.8rem;
  margin-top: 5px;
  flex-shrink: 0;
}
.check-list li strong { color: var(--text); font-weight: 500; }

/* ── 合作伙伴横向滚动条 ── */
.logo-marquee {
  position: relative;
  overflow: hidden;
  padding: 10px 0 6px;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.logo-track {
  display: flex;
  gap: 16px;
  width: max-content;
  animation: marquee 32s linear infinite;
}
.logo-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-size: 0.82rem;
  color: var(--text-muted);
  white-space: nowrap;
  transition: color 0.3s, border-color 0.3s;
}
.logo-chip i { color: var(--text-dim); font-size: 0.9rem; }
.logo-chip:hover { color: var(--text); border-color: var(--border-hover); }
@keyframes marquee {
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .logo-track { animation: none; }
}

/* ── 专利 / 证书墙 ── */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.cert-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 12px;
  overflow: hidden;
  transition: transform 0.4s var(--ease-out), border-color 0.3s;
}
.cert-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
}
.cert-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: calc(var(--radius) - 6px);
  display: block;
  background: #fff;
}
.cert-card span {
  display: block;
  margin-top: 10px;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  line-height: 1.4;
}

/* ── 合作案例大卡 ── */
.case-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  overflow: hidden;
  transition: transform 0.4s var(--ease-out), border-color 0.3s, background 0.3s;
}
.case-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}
.case-card .case-cover {
  position: relative;
  height: 260px;
  overflow: hidden;
}
.case-card .case-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
  opacity: 0.9;
}
.case-card:hover .case-cover img { transform: scale(1.06); }
.case-card .case-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0) 40%, rgba(0,0,0,0.85));
}
.case-card .case-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  font-size: 0.72rem;
  color: var(--text);
  letter-spacing: 0.06em;
}
.case-card .case-body { padding: 24px 26px 28px; }
.case-card .case-body h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 10px;
}
.case-card .case-body p {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.65;
}
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

/* ── 图库（赛事/活动） ── */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.gallery-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 4 / 3;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
  opacity: 0.9;
}
.gallery-item:hover img { transform: scale(1.05); opacity: 1; }
.gallery-item span {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 34px 16px 14px;
  background: linear-gradient(180deg, transparent, rgba(0,0,0,0.85));
  font-size: 0.78rem;
  color: var(--text);
  letter-spacing: 0.03em;
}

/* ── 职教服务：业务板块卡 ── */
.board-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
}
.board-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  padding: 28px 26px;
  overflow: hidden;
  transition: transform 0.4s var(--ease-out), border-color 0.3s, background 0.3s;
}
.board-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}
.board-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}
.board-card:hover::before { opacity: 1; }
.board-card .board-num {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
  display: block;
}
.board-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin-bottom: 12px;
}
.board-card ul {
  list-style: none;
  display: grid;
  gap: 8px;
}
.board-card ul li {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-left: 14px;
  position: relative;
  line-height: 1.5;
}
.board-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-dim);
}

/* ── 实训室清单 ── */
.lab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 12px;
}
.lab-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.3s, border-color 0.3s;
}
.lab-item i { color: var(--accent); font-size: 0.95rem; }
.lab-item:hover { color: var(--text); border-color: var(--border-hover); }

/* ── 学·创·赛 三步卡 ── */
.flow-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}
.flow-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  padding: 26px;
  transition: transform 0.4s var(--ease-out), border-color 0.3s;
}
.flow-card:hover { transform: translateY(-4px); border-color: var(--border-hover); }
.flow-card .flow-char {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, var(--text), var(--text-dim));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 14px;
  display: block;
}
.flow-card h3 { font-family: var(--font-display); font-size: 1.05rem; margin-bottom: 10px; }
.flow-card p { font-size: 0.83rem; color: var(--text-muted); line-height: 1.65; }

/* ── 淘宝商城入口 ── */
.mall-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color 0.3s, background 0.3s;
}
.mall-card:hover { border-color: var(--border-hover); background: rgba(255,255,255,0.07); }
.mall-card .mall-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.1rem;
  flex-shrink: 0;
}
.mall-card h3 { font-size: 0.95rem; margin-bottom: 4px; }
.mall-card p { font-size: 0.78rem; color: var(--text-muted); }

/* ── 领导关怀横条 ── */
.care-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}
.care-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 4 / 3;
}
.care-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
  transition: opacity 0.3s, transform 0.6s var(--ease-out);
}
.care-item:hover img { opacity: 1; transform: scale(1.04); }
.care-item span {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 30px 14px 12px;
  background: linear-gradient(180deg, transparent, rgba(0,0,0,0.9));
  font-size: 0.76rem;
  color: var(--text);
}

/* ── 响应式补充 ── */
@media (max-width: 760px) {
  .spec-grid { grid-template-columns: repeat(2, 1fr); }
  .product-row-visual.product-photo img { max-height: 220px; }
  .case-card .case-cover { height: 190px; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
}
/* 课程体系跳转时，为顶部导航预留位置 */
#curriculum {
  scroll-margin-top: 100px;
}
/* 合作案例页：视频 banner */
.page-hero.cases-video-hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 908px;
  padding: 80px 24px;
  overflow: hidden;
  isolation: isolate;
  background: #16171a;
}

/* 视频铺满，保持比例 */
.cases-video-hero .cases-banner-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
}

/* 黑色半透明遮罩 */
.cases-video-hero .cases-banner-shade {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1;
  pointer-events: none;
}

/* 标题在视频上方 */
.cases-video-hero .cases-banner-content {
  position: relative;
  z-index: 2;
  width: 100%;
  margin: 0 auto;
  text-align: center;
}

.cases-video-hero .kicker,
.cases-video-hero .page-title,
.cases-video-hero .page-title span,
.cases-video-hero .page-subtitle {
  color: #fff;
}

.cases-video-hero .kicker {
  opacity: 0.85;
}

.cases-video-hero .page-subtitle {
  margin: 20px auto 0;
  max-width: 720px;
}

/* 暂停按钮 */
.cases-video-hero .cases-video-toggle {
  position: absolute;
  right: 24px;
  bottom: 20px;
  z-index: 3;
  padding: 6px 14px;
  border: 1px solid rgba(255, 255, 255, 0.65);
  background: rgba(0, 0, 0, 0.2);
  color: #fff;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.cases-video-toggle:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 4px;
}

@media (max-width: 600px) {
  .page-hero.cases-video-hero {
    min-height: 340px;
    padding: 60px 20px;
  }

  .cases-video-hero .page-title {
    font-size: 44px;
  }

  .cases-video-hero .page-subtitle {
    font-size: 14px;
    line-height: 1.8;
  }
}
/* 产品大图：序列帧旋转 */
.prod-stage__media.prod-spin {
  position: relative;
  cursor: grab;
  touch-action: pan-y;
  user-select: none;
  -webkit-user-select: none;
}

.prod-stage__media.prod-spin.is-dragging {
  cursor: grabbing;
}

.prod-stage__media.prod-spin > img {
  pointer-events: none;
  -webkit-user-drag: none;
  opacity: 1;
  transition: none;
}

.prod-spin-tip {
  position: absolute;
  bottom: 14px;
  left: 0;
  right: 0;
  z-index: 2;
  font-size: 12px;
  color: #666;
  text-align: center;
  pointer-events: none;
}

.prod-stage__media.prod-spin:focus-visible {
  outline: 2px solid #d02928;
  outline-offset: -3px;
}
/* 旋转图片铺满整个产品框 */
.prod-stage__media.prod-spin {
  padding: 0;
  overflow: hidden;
}

.prod-stage__media.prod-spin > img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 0;
  object-fit: cover;
  object-position: center;
}
/* 产品分类：中文在上，英文在下 */
#groupTabs .prod-tab {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 5px;
  padding: 12px 20px;
}

/* 中文名称 */
#groupTabs .prod-tab__cn {
  order: 1;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
}

/* 英文名称 */
#groupTabs .prod-tab__en {
  order: 2;
  font-size: 10px;
  line-height: 1.4;
  letter-spacing: 1px;
}

/* 手机端字号 */
@media (max-width: 600px) {
  #groupTabs .prod-tab__cn {
    font-size: 16px;
  }
}
/* 二级产品名称：放大字号 */
#itemTabs .prod-subtab {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.5;
  padding: 10px 18px;
}

/* 当前选中的产品 */
#itemTabs .prod-subtab.is-active {
  font-weight: 700;
}

/* 手机端 */
@media (max-width: 600px) {
  #itemTabs .prod-subtab {
    font-size: 15px;
    padding: 8px 14px;
  }
}
/* 产品图片右上角的英文改为白色 */
#prodStage .prod-stage__tag {
  color: #fff;
  opacity: 1;
  z-index: 2;
}
/* 顶部导航字号 */
#mainNav .nav-link {
  font-size: 17px;
  font-weight: 500;
}
/* 首页大标题：统一中文字体和字重 */
#hero h1,
#hero h1 * {
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  font-weight: 900;
}
/* 产品分类增加后自动换行 */
#groupTabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#groupTabs .prod-tab {
  flex-shrink: 0;
}
/* 三大标杆案例：加宽内容区域 */
.flagship-cases > .container {
  width: 80%;
  max-width: 1600px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 0;
  padding-right: 0;
}

/* 三列布局，增加图片之间的距离 */
.flagship-cases .case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 44px;
}

/* 去掉原来的卡片外框、白底和阴影 */
.flagship-cases .case-card {
  min-width: 0;
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
  overflow: visible;
}

.flagship-cases .case-card:hover {
  box-shadow: none;
  transform: none;
}

/* 图片改成类似参考图的横向比例 */
.flagship-cases .case-cover {
  position: relative;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  border-radius: 20px;
  overflow: hidden;
}

.flagship-cases .case-cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* 去掉图片上的深色渐变 */
.flagship-cases .case-cover::before,
.flagship-cases .case-cover::after {
  display: none;
}

/* 图片下方文字直接与图片左侧对齐 */
.flagship-cases .case-body {
  padding: 24px 0 0;
  background: transparent;
}

.flagship-cases .case-body h3 {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.5;
}

.flagship-cases .case-body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: #555;
}

/* 平板 */
@media (max-width: 1000px) {
  .flagship-cases > .container {
    width: 90%;
  }

  .flagship-cases .case-grid {
    gap: 24px;
  }

  .flagship-cases .case-body h3 {
    font-size: 19px;
  }
}

/* 手机：改为单列 */
@media (max-width: 700px) {
  .flagship-cases > .container {
    width: calc(100% - 40px);
  }

  .flagship-cases .case-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .flagship-cases .case-body {
    padding-top: 18px;
  }
}
/* 去掉案例卡片及文字区域的白框 */
.flagship-cases .case-grid .case-card,
.flagship-cases .case-grid .case-card:hover,
.flagship-cases .case-grid .case-body {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  border-radius: 0;
}
/* 保留图片封面，点击后原位播放 */
.case-cover.case-click-video {
  position: relative;
  overflow: hidden;
}

/* 不让原来的装饰遮罩挡住点击 */
.case-click-video::before,
.case-click-video::after {
  display: none;
}

.case-click-video .case-video-cover {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  z-index: 2;
}

.case-click-video .case-video-cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-click-video .case-inline-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
  z-index: 1;
}

.case-click-video .case-inline-video[hidden],
.case-click-video .case-video-cover[hidden] {
  display: none;
}

.case-click-video .case-tag {
  z-index: 3;
  pointer-events: none;
}

/* 播放时隐藏图片上的分类标签 */
.case-click-video.is-playing .case-tag {
  display: none;
}

.case-video-cover:focus-visible {
  outline: 3px solid #d02928;
  outline-offset: -4px;
}
/* 合作案例页：正文所有区块统一放宽 */
body.page-cases main > section > .container {
  width: 80%;
  max-width: 1600px;
  margin-inline: auto;
  padding-inline: 0;
  box-sizing: border-box;
}

/* 培训照片：每行三张 */
body.page-cases .training-section .photo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 24px;
}

/* 清除图片原有外边距 */
body.page-cases .training-section .photo-grid > figure {
  min-width: 0;
  margin: 0;
}

/* 统一图片尺寸 */
body.page-cases .training-section .photo-grid img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 12px;
}

/* 图片下方文字 */
body.page-cases .training-section .photo-grid figcaption {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.6;
}

/* 平板 */
@media (max-width: 1024px) {
  body.page-cases main > section > .container {
    width: 90%;
  }

  body.page-cases .training-section .photo-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 手机 */
@media (max-width: 600px) {
  body.page-cases .training-section .photo-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}
/* 案例现场：电脑端一行四张 */
body.page-cases .onsite-section .photo-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

body.page-cases .onsite-section .photo-grid > figure {
  min-width: 0;
  margin: 0;
}

body.page-cases .onsite-section .photo-grid img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 12px;
}

/* 平板一行两张 */
@media (max-width: 1024px) {
  body.page-cases .onsite-section .photo-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 手机一行一张 */
@media (max-width: 600px) {
  body.page-cases .onsite-section .photo-grid {
    grid-template-columns: 1fr;
  }
}
/* 比赛图片：铺满正文，一行三张 */
body.page-cases .races-section .gallery-grid {
  display: grid;
  width: 100%;
  max-width: none;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

body.page-cases .races-section .gallery-item {
  position: relative;
  width: 100%;
  min-width: 0;
  max-width: none;
  height: auto;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

body.page-cases .races-section .gallery-item img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 培训照片：一行三张，共两行 */
body.page-cases .training-section .photo-grid {
  display: grid;
  width: 100%;
  max-width: none;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 24px;
}

body.page-cases .training-section .photo-grid > figure {
  width: 100%;
  min-width: 0;
  margin: 0;
}

body.page-cases .training-section .photo-grid img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 12px;
}

body.page-cases .training-section .photo-grid figcaption {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.6;
}

/* 平板：每行两张 */
@media (max-width: 1024px) {
  body.page-cases .races-section .gallery-grid,
  body.page-cases .training-section .photo-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 手机：每行一张 */
@media (max-width: 600px) {
  body.page-cases .races-section .gallery-grid,
  body.page-cases .training-section .photo-grid {
    grid-template-columns: 1fr;
  }
}
/* 关于我们：视频背景 */
section.page-hero.about-video-hero {
  position: relative;
  isolation: isolate;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 905px;
  padding: 80px 0;
  box-sizing: border-box;
  overflow: hidden;
  background: #17191c;
}

/* 视频铺满 Banner */
.about-video-hero .about-banner-video {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  pointer-events: none;
}

/* 黑色半透明遮罩 */
.about-video-hero .about-banner-shade {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

/* 文字位于视频上方 */
.about-video-hero .page-hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  text-align: center;
}

.about-video-hero .kicker,
.about-video-hero .page-title,
.about-video-hero .page-title span,
.about-video-hero .page-subtitle {
  color: #fff;
}

.about-video-hero .kicker,
.about-video-hero .page-subtitle {
  opacity: 1;
}

/* 手机端 */
@media (max-width: 767px) {
  section.page-hero.about-video-hero {
    min-height: 320px;
    padding: 60px 20px;
  }
}
/* 首页 Banner 简介文字宽度 */
#hero .hero-desc {
  width: 100%;
  max-width: 900px;
}