/* AI 助手 · 写作工具条（虚线框 + 主题色透明） */
.ai-opt-bar{
  --ai-ink:var(--text, #0f172a);
  --ai-muted:var(--muted, #64748b);
  --ai-accent:var(--accent, #0d9488);
  --ai-deep:var(--accent-deep, #0a736a);
  --ai-soft:var(--accent-soft, rgba(13,148,136,.12));
  --ai-line:color-mix(in srgb, var(--ai-accent) 28%, transparent);
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  margin:0 0 14px;
  padding:12px 14px;
  border:1px dashed var(--ai-line);
  border-radius:12px;
  background:var(--ai-soft);
  overflow:hidden;
  isolation:isolate;
  transition:border-color .2s ease, background .2s ease;
}
.ai-opt-bar.is-busy{
  border-color:color-mix(in srgb, var(--ai-accent) 45%, transparent);
  background:color-mix(in srgb, var(--ai-accent) 16%, transparent);
}
.ai-opt-bar.is-busy::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(105deg, transparent 35%, color-mix(in srgb, #fff 50%, transparent) 50%, transparent 65%);
  background-size:220% 100%;
  animation:ai-opt-shimmer 1.35s ease-in-out infinite;
  pointer-events:none;
  z-index:0;
}

.ai-opt-brand{
  position:relative;
  z-index:1;
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
}
.ai-opt-mark{
  flex:none;
  width:34px;height:34px;
  display:grid;place-items:center;
  border-radius:10px;
  color:var(--ai-accent);
  background:color-mix(in srgb, var(--ai-accent) 14%, #fff);
  border:1px dashed color-mix(in srgb, var(--ai-accent) 32%, transparent);
  font-size:18px;
}
.ai-opt-brand-copy{min-width:0;line-height:1.2}
.ai-opt-title{
  display:block;
  font-size:13.5px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--ai-ink);
}
.ai-opt-sub{
  display:block;
  margin-top:2px;
  font-size:11.5px;
  color:var(--ai-muted);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  max-width:220px;
}

.ai-opt-actions{
  position:relative;
  z-index:1;
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
  margin-left:auto;
}
.ai-opt-btn{
  appearance:none;
  border:1px solid transparent;
  border-radius:10px;
  height:34px;
  padding:0 12px;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font:inherit;
  font-size:12.5px;
  font-weight:600;
  cursor:pointer;
  transition:transform .15s ease, background .2s ease, border-color .2s ease, color .2s ease, opacity .2s ease;
  user-select:none;
}
.ai-opt-btn i{font-size:15px;line-height:1}
.ai-opt-btn:active:not([disabled]){transform:translateY(1px)}
.ai-opt-btn[disabled]{opacity:.55;cursor:wait}

.ai-opt-btn--primary{
  color:#fff;
  background:var(--ai-accent);
  border-color:color-mix(in srgb, var(--ai-deep) 35%, transparent);
}
.ai-opt-btn--primary:hover:not([disabled]){
  background:var(--ai-deep);
}
.ai-opt-btn--ghost{
  color:var(--ai-deep);
  background:rgba(255,255,255,.7);
  border:1px dashed color-mix(in srgb, var(--ai-accent) 30%, transparent);
}
.ai-opt-btn--ghost:hover:not([disabled]){
  background:#fff;
  border-color:color-mix(in srgb, var(--ai-accent) 50%, transparent);
}

.ai-opt-status{
  position:relative;
  z-index:1;
  display:none;
  align-items:center;
  gap:7px;
  font-size:12px;
  color:var(--ai-deep);
  font-weight:600;
}
.ai-opt-bar.is-busy .ai-opt-status{display:inline-flex}
.ai-opt-status-dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--ai-accent);
  box-shadow:0 0 0 0 color-mix(in srgb, var(--ai-accent) 45%, transparent);
  animation:ai-opt-pulse 1.2s ease-out infinite;
}

.ai-opt-toast{
  position:fixed;right:16px;bottom:16px;z-index:9999;
  max-width:360px;padding:11px 14px;border-radius:12px;
  background:#0f172a;color:#fff;font-size:13px;
  box-shadow:0 10px 28px rgba(15,23,42,.18);
  animation:ai-opt-toast-in .22s ease-out;
}
.ai-opt-toast.is-err{background:#b91c1c}

@keyframes ai-opt-shimmer{
  0%{background-position:120% 0}
  100%{background-position:-40% 0}
}
@keyframes ai-opt-pulse{
  0%{box-shadow:0 0 0 0 color-mix(in srgb, var(--ai-accent) 45%, transparent)}
  70%{box-shadow:0 0 0 8px transparent}
  100%{box-shadow:0 0 0 0 transparent}
}
@keyframes ai-opt-toast-in{
  from{opacity:0;transform:translateY(8px)}
  to{opacity:1;transform:translateY(0)}
}

@media (max-width:720px){
  .ai-opt-actions{margin-left:0;width:100%}
  .ai-opt-btn{flex:1;justify-content:center}
  .ai-opt-sub{max-width:160px}
}

/* AI 助手 · 文章摘要卡片（帖子详情页正文顶部） */
.ai-summary{
  --ais-primary:var(--accent,#5b5ef6);
  margin:15px 0;
  padding:15px;
  border-radius:var(--radius);
  background:var(--bg);
  border:none;
}
.ai-summary-head{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.ai-summary .ai-chat-head-icon{
  width:30px;height:30px;border-radius:8px;
  display:grid;place-items:center;
  background:var(--accent-soft,rgba(13,148,136,.12));
  color:var(--accent,#0d9488);flex:0 0 auto;
}
.ai-summary .ai-chat-head-icon i{font-size:16px}
.ai-summary-title{font-size:16px;font-weight:500;color:var(--cover-ink);letter-spacing:.01em}
.ai-summary-brand{margin-left:auto;font-size:12px;font-weight:500;color:var(--muted);letter-spacing:.1em}
.ai-summary-box{background:var(--card);border:none;border-radius:var(--radius);padding:15px}
.ai-summary-text{margin:0;font-size:14px;line-height:1.95;color:var(--text-soft);letter-spacing:.01em}
.ai-summary-text.is-loading{color:#9aa2bd}
.ai-summary-text.is-error{color:#e0566b}
.ai-summary-gen-btn{
  border:1px solid var(--ais-primary);color:var(--ais-primary);background:transparent;
  border-radius:10px;padding:9px 18px;font-size:14px;cursor:pointer;transition:.15s;
}
.ai-summary-gen-btn:hover{background:var(--ais-primary);color:#fff}
.ai-summary-caret{
  display:inline-block;width:2px;height:1.05em;margin-left:2px;vertical-align:-2px;
  background:var(--ais-primary);animation:aisBlink 1s steps(1) infinite;
}
@keyframes aisBlink{50%{opacity:0}}
.ai-summary-dot{
  display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--ais-primary);
  margin-right:8px;vertical-align:2px;animation:aisPulse 1s infinite;
}
@keyframes aisPulse{0%,100%{opacity:.35}50%{opacity:1}}