/* ===== 进阶助手页（与 help.css 侧栏配合）===== */

/* 双栏时侧栏勿被拉高，否则 position:sticky 无法相对视口「悬浮」 */
.assistant-page .help-layout {
  align-items: flex-start;
}

.assistant-page .help-sidebar {
  position: sticky;
  top: 72px;
  max-height: calc(100vh - 72px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  z-index: 1;
}

/* 目录：h2「功能展示」下的 h3 小节用嵌套列表缩进，与正文标题层级一致 */
.assistant-nav .help-nav-list--nested {
  list-style: none;
  margin: 0;
  padding: 0 0 4px 0;
}

.assistant-nav .help-nav-list--nested .help-nav-link {
  padding-left: 40px;
  font-size: 14px;
  color: #6b7280;
}

.assistant-content {
  padding-top: 24px;
}

.assistant-anchor {
  scroll-margin-top: 80px;
}

.assistant-download-section {
  margin-bottom: 40px;
}

.assistant-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 28px 24px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.assistant-lead {
  margin: 0 0 20px;
  font-size: 18px;
  line-height: 1.65;
  color: #4b5563;
}

.assistant-title {
  margin: 0 0 24px;
  font-size: 22px;
  font-weight: 600;
  color: #1f2937;
  line-height: 1.4;
}

.assistant-download-line {
  margin: 0;
  font-size: 20px;
  line-height: 1.5;
  color: #374151;
}

.assistant-download-link {
  font-weight: 500;
  color: #f97316;
  text-decoration: none;
}

.assistant-download-link:hover {
  text-decoration: underline;
}

/* 二级标题：功能展示 */
.assistant-h2 {
  margin: 0 0 28px;
  font-size: 26px;
  font-weight: 600;
  color: #111827;
  padding-bottom: 12px;
  border-bottom: 2px solid #e5e7eb;
}

.assistant-feature-root {
  margin-bottom: 24px;
}

/* 三级标题 + 截图 */
.assistant-demo-block {
  margin-bottom: 36px;
}

.assistant-demo-block:last-child {
  margin-bottom: 0;
}

.assistant-h3 {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 600;
  color: #1f2937;
  padding-left: 10px;
  border-left: 3px solid #f97316;
}

.assistant-demo-desc {
  margin: 0 0 16px;
  max-width: 52em;
  font-size: 15px;
  line-height: 1.75;
  color: #4b5563;
}

.assistant-demo-img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  cursor: zoom-in;
}

.assistant-demo-img + .assistant-demo-img {
  margin-top: 16px;
}

/* 功能展示截图全屏查看（遮住页面其他内容；高于站内 modal / 二维码气泡） */
.assistant-image-lightbox {
  position: fixed;
  inset: 0;
  z-index: 10050;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 56px 20px 24px;
  box-sizing: border-box;
}

.assistant-image-lightbox.active {
  display: flex;
}

.assistant-image-lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
  cursor: pointer;
}

.assistant-image-lightbox-close {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.assistant-image-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.28);
}

.assistant-image-lightbox-prev,
.assistant-image-lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 48px;
  height: 48px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 34px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.assistant-image-lightbox-prev {
  left: max(8px, env(safe-area-inset-left));
}

.assistant-image-lightbox-next {
  right: max(8px, env(safe-area-inset-right));
}

.assistant-image-lightbox-prev:hover,
.assistant-image-lightbox-next:hover {
  background: rgba(255, 255, 255, 0.24);
}

.assistant-image-lightbox-prev:disabled,
.assistant-image-lightbox-next:disabled {
  opacity: 0.28;
  cursor: not-allowed;
  pointer-events: none;
}

.assistant-image-lightbox-prev:disabled:hover,
.assistant-image-lightbox-next:disabled:hover {
  background: rgba(255, 255, 255, 0.12);
}

.assistant-image-lightbox--single .assistant-image-lightbox-prev,
.assistant-image-lightbox--single .assistant-image-lightbox-next,
.assistant-image-lightbox--single .assistant-image-lightbox-counter {
  display: none;
}

.assistant-image-lightbox-counter {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  font-size: 13px;
  line-height: 1.4;
  pointer-events: none;
}

.assistant-image-lightbox-frame {
  position: relative;
  z-index: 1;
  max-width: min(92vw, 100%);
  max-height: 88vh;
  margin: 0;
}

.assistant-image-lightbox-img {
  display: block;
  max-width: min(92vw, 100%);
  max-height: 88vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  cursor: default;
  user-select: none;
}

@media (max-width: 900px) {
  .assistant-anchor {
    scroll-margin-top: 72px;
  }

  /* 窄屏纵向堆叠时恢复默认，避免侧栏占满一屏高度等异常 */
  .assistant-page .help-layout {
    align-items: stretch;
  }

  .assistant-page .help-sidebar {
    position: static;
    top: auto;
    max-height: none;
    overflow-y: visible;
    z-index: auto;
  }
}