/* 共享样式：高端配色、字体栈与占位标记 */

/* 字体栈（中文优先，英文无衬线） */
html, body {
  font-family: "Alibaba PuHuiTi", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 高端留白与容器控制 */
.hd-container {
  max-width: 1440px;
  margin: 0 auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

/* 微交互与过渡统一 */
.smooth-transition {
  transition: all .3s ease;
}
.hover-raise:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px -8px rgba(0,0,0,.15);
}

/* 图片优化（懒加载 + 高清显示） */
img[loading="lazy"] {
  content-visibility: auto;
}
img {
  image-rendering: auto;
}

/* 占位区域标记：可编辑/待填写内容显式标识 */
.placeholder-region {
  position: relative;
  border: 1px dashed rgba(59,130,246,.35);
  background: rgba(59,130,246,.04);
  border-radius: .5rem;
  padding: .25rem .5rem;
}
.placeholder-region::after {
  content: attr(data-placeholder);
  position: absolute;
  top: -10px;
  left: 12px;
  background: #3B82F6;
  color: #fff;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,.15);
}

/* 可编辑区域提示背景（用于整块内容占位） */
.placeholder-block {
  border: 1px dashed rgba(59,130,246,.35);
  background: rgba(59,130,246,.06);
  border-radius: .75rem;
}

/* 导航栏优化（透明滚动 + 模糊） */
.navbar-elevated {
  backdrop-filter: saturate(180%) blur(8px);
}

/* 时间线与占位布局防遮挡增强 */
.timeline-item {
  padding-top: 1.75rem;
}
.timeline-item::before,
.timeline-item::after {
  z-index: 1;
}
.timeline-item > *:not(.timeline-date-badge) {
  position: relative;
  z-index: 2;
}
.timeline-date-badge {
  position: absolute;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(0,0,0,.12);
  padding: 7.2px 12px;
}
.timeline-item--wide {
  padding-left: 12rem;
}
.timeline-item--wider {
  padding-left: 14rem;
}
.timeline-item--mobile {
  padding-left: 0 !important;
}
.timeline-item--mobile::before,
.timeline-item--mobile::after {
  display: none;
}

@media (max-width: 640px) {
  .timeline-date-badge {
    position: static;
    z-index: auto;
    display: inline-block;
    margin-bottom: .5rem;
    font-size: .875rem; /* 14px */
    max-width: none;
  }
  .timeline-item {
    padding-top: .5rem;
  }
}

/* 占位元素布局优化：避免与其他内容重叠 */
.placeholder-region {
  display: block;
  min-height: 1.75rem;
  padding-right: .75rem;
  overflow-wrap: anywhere;
  margin-top: .5rem;
}

/* 装饰元素在移动端隐藏避免遮挡 */
.decorative-hide-mobile {
  pointer-events: none;
}
@media (max-width: 640px) {
  .decorative-hide-mobile {
    display: none !important;
  }
}

/* 统一可访问焦点样式 */
.focus-ring:focus-visible {
  outline: 2px solid #3B82F6;
  outline-offset: 2px;
}

/* 下载页字体与占位在溢出容器内的可见性与排版修复 */
.download-page p,
.download-page li,
.download-page span {
  line-height: 1.7;
}
.overflow-hidden .placeholder-region {
  padding-top: 14px;
}
.overflow-hidden .placeholder-region::after {
  top: 2px;
  left: 8px;
}
.download-page .grid > * {
  min-height: 2.25rem;
}
.download-page .text-block,
.download-page .content-box,
.download-page .card-section {
  overflow: auto;
}
.download-page .placeholder-region {
  padding-top: 1.25rem;
  margin-top: 0.75rem;
  line-height: 1.7;
  word-break: break-word;
  white-space: normal;
}

@media (max-width: 640px) {
  .download-page h4 {
    font-size: clamp(1rem, 4.5vw, 1.25rem);
  }
  .download-page .p-6,
  .download-page .p-4,
  .download-page .p-3 {
    padding: 1rem;
  }
}

/* 时间线日期统一宽度与对齐，避免错位 */
.timeline-date-badge {
  width: 150px;
  max-width: none !important;
  text-align: center;
  padding: 6px 15px;
  line-height: 1.6;
  border-radius: 8px;
  font-size: clamp(0.875rem, 1.25vw, 1rem);
  color: #fff;
  white-space: normal;
  left: 100px !important;
}

/* 时间线正文最小高度，避免截断 */
.timeline-item h3,
.timeline-item p,
.timeline-item .placeholder-region {
  min-height: 1.75rem;
}