/* =====================================================================
 * AI 知识库助手 · 悬浮入口
 * 把部署在云服务器的 RAG 智能体（http://101.200.184.201:8081/）以
 * 右下角悬浮球 + 毛玻璃介绍卡的形式接入全站。视觉沿用站点的极光 / 玻璃 /
 * 淡蓝（#49B1F5）基调，与 background.css、claude-article.css 一致。
 *
 * 为什么是「新标签打开」而不是 iframe 内嵌：
 *   博客是 https，智能体是 http，浏览器会按「混合内容」拦掉 http 的 iframe；
 *   而从 https 页面用链接跳到 http 新标签是允许的。等智能体上了 HTTPS/域名，
 *   再把 CTA 换成 iframe 弹层即可（JS 里已留 AGENT_URL 单点常量）。
 * ===================================================================== */

:root {
  --ai-grad: linear-gradient(135deg, #49b1f5 0%, #6e8bff 52%, #9e82de 100%);
  --ai-grad-soft: linear-gradient(135deg, rgba(73, 177, 245, 0.16), rgba(158, 130, 222, 0.16));
  --ai-blue: #49b1f5;
  --ai-ink: #2b3a55;
  --ai-ink-soft: #6b7a93;
  --ai-card-bg: rgba(255, 255, 255, 0.72);
  --ai-card-border: rgba(255, 255, 255, 0.65);
  --ai-chip-bg: rgba(255, 255, 255, 0.78);
  --ai-chip-border: rgba(73, 177, 245, 0.18);
  --ai-shadow: 0 18px 50px -12px rgba(53, 86, 150, 0.40);
}

[data-theme="dark"] {
  --ai-ink: #e6ecf5;
  --ai-ink-soft: #9aa6bd;
  --ai-card-bg: rgba(30, 36, 50, 0.78);
  --ai-card-border: rgba(255, 255, 255, 0.10);
  --ai-chip-bg: rgba(255, 255, 255, 0.05);
  --ai-chip-border: rgba(110, 139, 255, 0.28);
  --ai-shadow: 0 18px 50px -12px rgba(0, 0, 0, 0.55);
}

/* 移除右下角冗余控件：设置齿轮(#rightside-config) + 返回顶部(#go-up)。
   站点已关闭 darkmode / translate，齿轮实际只切换 readmode，意义不大；
   返回顶部按需求一并去掉。右下角只保留 AI 助手悬浮球，干净利落。 */
#rightside #rightside-config,
#rightside #go-up {
  display: none !important;
}

/* 抬高 Butterfly 自带右下角控件（如移动端 TOC），给悬浮球让位（默认 bottom:40px） */
#rightside {
  bottom: 96px !important;
}

/* ---------- 悬浮球 ---------- */
#ai-assistant-root {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 1001;
  font-family: "LXGW WenKai", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
}

#ai-launcher {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 58px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  color: #fff;
  background: var(--ai-grad);
  box-shadow: var(--ai-shadow);
  transition: transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.28s ease;
  animation: ai-float 4.5s ease-in-out infinite;
}

#ai-launcher:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 22px 55px -10px rgba(73, 177, 245, 0.6);
}

#ai-launcher:active {
  transform: translateY(-1px) scale(0.98);
}

#ai-launcher svg {
  width: 26px;
  height: 26px;
}

/* 呼吸光晕 */
#ai-launcher::before {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  background: var(--ai-grad);
  opacity: 0.35;
  filter: blur(10px);
  z-index: -1;
  animation: ai-glow 3.4s ease-in-out infinite;
}

/* 在线小绿点 */
#ai-launcher .ai-dot {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #34d399;
  border: 2px solid #fff;
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7);
  animation: ai-ping 2s ease-out infinite;
}

[data-theme="dark"] #ai-launcher .ai-dot {
  border-color: #1e2432;
}

/* 首次出现的引导气泡 */
#ai-tip {
  position: absolute;
  right: 70px;
  bottom: 10px;
  max-width: 220px;
  padding: 9px 14px;
  border-radius: 14px 14px 2px 14px;
  background: var(--ai-card-bg);
  border: 1px solid var(--ai-card-border);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  color: var(--ai-ink);
  font-size: 13px;
  line-height: 1.5;
  white-space: nowrap;
  box-shadow: var(--ai-shadow);
  opacity: 0;
  transform: translateX(8px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

#ai-tip.show {
  opacity: 1;
  transform: translateX(0);
}

#ai-tip b {
  color: var(--ai-blue);
}

/* ---------- 展开卡片 ---------- */
#ai-panel {
  position: absolute;
  right: 0;
  bottom: 74px;
  width: 348px;
  max-width: calc(100vw - 32px);
  border-radius: 22px;
  background: var(--ai-card-bg);
  border: 1px solid var(--ai-card-border);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  backdrop-filter: blur(22px) saturate(150%);
  box-shadow: var(--ai-shadow);
  overflow: hidden;
  transform-origin: bottom right;
  opacity: 0;
  transform: translateY(14px) scale(0.92);
  pointer-events: none;
  transition: opacity 0.26s ease, transform 0.3s cubic-bezier(0.34, 1.4, 0.5, 1);
}

#ai-assistant-root.open #ai-panel {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

#ai-assistant-root.open #ai-launcher {
  animation: none;
}

/* 卡片头部 */
.ai-panel-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 18px 14px;
  background: var(--ai-grad-soft);
  border-bottom: 1px solid var(--ai-card-border);
}

.ai-panel-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: var(--ai-grad);
  color: #fff;
  box-shadow: 0 8px 20px -6px rgba(73, 177, 245, 0.7);
  flex-shrink: 0;
}

.ai-panel-avatar svg {
  width: 22px;
  height: 22px;
}

.ai-panel-title {
  flex: 1;
  min-width: 0;
  line-height: 1.3;
}

.ai-panel-title .t {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ai-ink);
}

.ai-panel-title .s {
  font-size: 11.5px;
  color: var(--ai-ink-soft);
  margin-top: 2px;
}

.ai-panel-title .s i {
  font-style: normal;
  color: #10b981;
  font-weight: 600;
}

.ai-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 9px;
  background: transparent;
  color: var(--ai-ink-soft);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
  flex-shrink: 0;
}

.ai-close:hover {
  background: rgba(125, 145, 180, 0.16);
  color: var(--ai-ink);
}

.ai-close svg {
  width: 17px;
  height: 17px;
}

/* 卡片正文 */
.ai-panel-body {
  padding: 16px 18px 18px;
}

.ai-greet {
  font-size: 13px;
  line-height: 1.65;
  color: var(--ai-ink-soft);
  margin: 0 0 14px;
}

.ai-greet b {
  color: var(--ai-ink);
}

.ai-examples-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ai-ink-soft);
  margin-bottom: 9px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.ai-examples-label::before {
  content: "";
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: var(--ai-blue);
  opacity: 0.6;
}

.ai-examples {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.ai-chip {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 9px 11px;
  border-radius: 13px;
  border: 1px solid var(--ai-chip-border);
  background: var(--ai-chip-bg);
  color: var(--ai-ink);
  font-size: 12.5px;
  line-height: 1.45;
  text-align: left;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.ai-chip:hover {
  transform: translateX(3px);
  border-color: rgba(73, 177, 245, 0.55);
  box-shadow: 0 6px 16px -8px rgba(73, 177, 245, 0.55);
}

.ai-chip .tag {
  flex-shrink: 0;
  font-size: 10.5px;
  font-weight: 700;
  color: var(--ai-blue);
  background: rgba(73, 177, 245, 0.12);
  padding: 2px 7px;
  border-radius: 7px;
}

.ai-chip .q {
  flex: 1;
  min-width: 0;
  color: var(--ai-ink-soft);
}

.ai-chip:hover .q {
  color: var(--ai-ink);
}

/* CTA 主按钮 */
.ai-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 14px;
  background: var(--ai-grad);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 12px 26px -10px rgba(73, 177, 245, 0.8);
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.ai-cta:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
  box-shadow: 0 16px 32px -10px rgba(73, 177, 245, 0.9);
  color: #fff;
}

.ai-cta svg {
  width: 17px;
  height: 17px;
  transition: transform 0.2s ease;
}

.ai-cta:hover svg {
  transform: translateX(3px);
}

.ai-foot {
  margin-top: 11px;
  text-align: center;
  font-size: 10.5px;
  color: var(--ai-ink-soft);
  opacity: 0.85;
}

.ai-foot svg {
  width: 11px;
  height: 11px;
  vertical-align: -1px;
  margin-right: 3px;
}

/* ---------- 复制提示 toast ---------- */
#ai-toast {
  position: fixed;
  left: 50%;
  bottom: 38px;
  transform: translate(-50%, 16px);
  z-index: 1002;
  padding: 10px 18px;
  border-radius: 12px;
  background: rgba(43, 58, 85, 0.92);
  color: #fff;
  font-size: 13px;
  font-family: inherit;
  box-shadow: 0 10px 30px -8px rgba(0, 0, 0, 0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.28s ease, transform 0.28s ease;
}

#ai-toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

#ai-toast svg {
  width: 15px;
  height: 15px;
  vertical-align: -3px;
  margin-right: 5px;
  color: #34d399;
}

/* ---------- 动画 ---------- */
@keyframes ai-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes ai-glow {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(1.08); }
}

@keyframes ai-ping {
  0% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(52, 211, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

/* ---------- 响应式：手机端做成「贴底弹层」，触屏更好按、内容超高内部滚动 ---------- */
@media (max-width: 768px) {
  #ai-assistant-root {
    right: 16px;
    bottom: 16px;
  }
  #ai-launcher {
    width: 54px;
    height: 54px;
  }
  #ai-launcher svg {
    width: 24px;
    height: 24px;
  }
  #ai-tip {
    display: none;
  }

  /* 面板：左右留 16px、贴右对齐；限制最大高度，超出则卡片内部滚动，
     再也不会把顶部顶出屏幕。用 dvh 兼容移动端浏览器地址栏收缩。 */
  #ai-panel {
    width: calc(100vw - 32px);
    max-width: 400px;
    bottom: 80px;
    max-height: calc(100vh - 104px);
    max-height: calc(100dvh - 104px);
    display: flex;
    flex-direction: column;
    border-radius: 20px;
    transform-origin: bottom right;
  }
  /* 顶部小抓手，强化「弹层」质感 */
  #ai-panel::before {
    content: "";
    position: absolute;
    top: 7px;
    left: 50%;
    width: 38px;
    height: 4px;
    border-radius: 999px;
    background: rgba(125, 145, 180, 0.35);
    transform: translateX(-50%);
    z-index: 2;
    pointer-events: none;
  }

  .ai-panel-head {
    flex-shrink: 0;
    padding: 20px 16px 12px;
  }
  .ai-panel-avatar {
    width: 40px;
    height: 40px;
    border-radius: 12px;
  }

  /* 正文成为唯一滚动区：头部固定、示例可滑动、CTA 跟随 */
  .ai-panel-body {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    padding: 14px 16px 16px;
  }
  .ai-greet {
    font-size: 12.5px;
    margin-bottom: 12px;
  }
  .ai-examples {
    gap: 7px;
    margin-bottom: 14px;
  }
  .ai-chip {
    padding: 11px 12px;
    border-radius: 12px;
  }
  .ai-chip .q {
    font-size: 12.5px;
  }
  .ai-cta {
    padding: 13px;
    font-size: 14.5px;
  }

  #rightside {
    bottom: 84px !important;
  }
}

/* 矮视口（横屏 / 小屏手机）：进一步压缩，优先保证示例与按钮可见 */
@media (max-width: 768px) and (max-height: 560px) {
  #ai-panel {
    bottom: 72px;
    max-height: calc(100vh - 90px);
    max-height: calc(100dvh - 90px);
  }
  .ai-greet {
    display: none;
  }
}

/* 尊重「减少动态效果」 */
@media (prefers-reduced-motion: reduce) {
  #ai-launcher,
  #ai-launcher::before,
  #ai-launcher .ai-dot {
    animation: none !important;
  }
  #ai-panel,
  #ai-chip,
  .ai-cta {
    transition: opacity 0.2s ease !important;
  }
}