/* 星辰 AI 问答：与首页和学习页共用，所有选择器均使用 aiq 前缀隔离。 */
:root {
  --aiq-ink: #15204b;
  --aiq-muted: #6d7698;
  --aiq-blue: #3468ef;
  --aiq-violet: #7657e8;
  --aiq-line: rgba(52, 86, 170, 0.14);
  --aiq-surface: #ffffff;
  --aiq-soft: #f4f7ff;
  --aiq-danger: #c54458;
  --aiq-shadow: 0 28px 80px rgba(21, 35, 86, 0.24);
}

.aiq-launcher-host[data-ai-chat-placement="inline"] {
  display: inline-flex;
  vertical-align: middle;
}

.aiq-launcher-host[data-ai-chat-placement="floating"] {
  position: fixed;
  z-index: 1000;
  top: calc(env(safe-area-inset-top, 0px) + 12px);
  right: 16px;
}

.aiq-launcher {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 14px;
  border: 1px solid rgba(72, 102, 213, 0.16);
  border-radius: 12px;
  color: #fff;
  background: linear-gradient(135deg, #2868f0, #694fd7);
  box-shadow: 0 8px 22px rgba(49, 84, 203, 0.24);
  font: 750 14px/1 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, filter 180ms ease;
}

.aiq-launcher:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(49, 84, 203, 0.3);
  filter: saturate(1.08);
}

.aiq-launcher:active { transform: translateY(0) scale(0.97); }

.aiq-launcher:focus-visible,
.aiq-panel button:focus-visible,
.aiq-panel textarea:focus-visible,
.aiq-panel input:focus-visible {
  outline: 3px solid rgba(56, 109, 242, 0.3);
  outline-offset: 3px;
}

.aiq-launcher-icon {
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  font-size: 15px;
  color: #fff7c0;
}

.aiq-launcher-host[data-ai-chat-placement="floating"] .aiq-launcher {
  min-width: 92px;
  min-height: 44px;
  border: 2px solid rgba(255, 255, 255, 0.72);
  border-radius: 16px;
  background: linear-gradient(135deg, #ff6b9d, #8a5be9);
  box-shadow: 0 8px 26px rgba(131, 72, 181, 0.3);
}

.aiq-backdrop {
  position: fixed;
  z-index: 1090;
  inset: 0;
  visibility: hidden;
  opacity: 0;
  background: rgba(13, 20, 51, 0.28);
  backdrop-filter: blur(3px);
  transition: opacity 220ms ease, visibility 220ms ease;
}

.aiq-backdrop[data-open="true"] { visibility: visible; opacity: 1; }

.aiq-panel {
  position: fixed;
  z-index: 1100;
  top: 82px;
  right: 24px;
  bottom: 24px;
  width: min(410px, calc(100vw - 32px));
  min-height: 460px;
  overflow: hidden;
  display: grid;
  grid-template-rows: auto 1fr auto;
  border: 1px solid rgba(70, 92, 168, 0.18);
  border-radius: 24px;
  color: var(--aiq-ink);
  background: var(--aiq-surface);
  box-shadow: var(--aiq-shadow);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  visibility: hidden;
  opacity: 0;
  transform: translate3d(24px, 0, 0) scale(0.98);
  transform-origin: top right;
  transition: opacity 200ms ease, transform 240ms cubic-bezier(.2,.8,.2,1), visibility 240ms;
}

.aiq-panel[data-open="true"] {
  visibility: visible;
  opacity: 1;
  transform: translate3d(0, 0, 0) scale(1);
}

.aiq-header {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 18px 16px;
  color: #fff;
  background:
    radial-gradient(circle at 82% 20%, rgba(255,255,255,.9) 0 1px, transparent 2px),
    radial-gradient(circle at 72% 72%, rgba(255,231,133,.75) 0 1px, transparent 2px),
    linear-gradient(118deg, #1d3c9c 0%, #425ed9 55%, #7959d7 100%);
}

.aiq-header::after {
  content: "";
  position: absolute;
  width: 130px;
  height: 130px;
  right: -54px;
  top: -70px;
  border: 12px solid rgba(255,255,255,.11);
  border-radius: 50%;
  transform: rotate(-18deg);
  pointer-events: none;
}

.aiq-identity { position: relative; display: flex; align-items: center; gap: 11px; min-width: 0; }

.aiq-avatar {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.45);
  border-radius: 14px;
  color: #fff4a7;
  background: rgba(255,255,255,.14);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.28);
  font-size: 21px;
}

.aiq-title { margin: 0; color: #fff; font-size: 17px; font-weight: 800; letter-spacing: .01em; }
.aiq-subtitle { margin-top: 4px; color: rgba(255,255,255,.72); font-size: 11px; font-weight: 600; }

.aiq-status-dot {
  width: 7px;
  height: 7px;
  display: inline-block;
  margin-right: 5px;
  border-radius: 50%;
  background: #82edac;
  box-shadow: 0 0 0 3px rgba(130,237,172,.14);
}

.aiq-header-actions { position: relative; z-index: 1; display: flex; align-items: center; gap: 7px; }

.aiq-history-toggle {
  min-width: 64px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0 10px;
  border: 0;
  border-radius: 12px;
  color: #fff;
  background: rgba(255,255,255,.12);
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: background 160ms ease, transform 160ms ease;
}
.aiq-history-toggle svg { width: 16px; height: 16px; }
.aiq-history-toggle:hover,
.aiq-history-toggle[aria-expanded="true"] { background: rgba(255,255,255,.21); }
.aiq-history-toggle:active { transform: scale(.96); }
.aiq-history-toggle:disabled { opacity: .45; cursor: not-allowed; }

.aiq-close {
  position: relative;
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 12px;
  color: #fff;
  background: rgba(255,255,255,.12);
  font-size: 22px;
  cursor: pointer;
  transition: background 160ms ease, transform 160ms ease;
}

.aiq-close:hover { background: rgba(255,255,255,.2); transform: rotate(4deg); }

.aiq-history-shade {
  position: absolute;
  z-index: 8;
  inset: 0;
  visibility: hidden;
  opacity: 0;
  background: rgba(20, 29, 68, .26);
  backdrop-filter: blur(1.5px);
  transition: opacity 180ms ease, visibility 180ms ease;
}
.aiq-history-shade[data-open="true"] { visibility: visible; opacity: 1; }

.aiq-history-drawer {
  position: absolute;
  z-index: 9;
  inset: 0 auto 0 0;
  width: min(310px, 84%);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  color: var(--aiq-ink);
  background: #f8f9ff;
  box-shadow: 18px 0 42px rgba(24, 37, 86, .2);
  visibility: hidden;
  transform: translate3d(-102%, 0, 0);
  transition: transform 230ms cubic-bezier(.2,.8,.2,1), visibility 230ms;
}
.aiq-history-drawer[data-open="true"] { visibility: visible; transform: translate3d(0, 0, 0); }

.aiq-history-header {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px;
  border-bottom: 1px solid var(--aiq-line);
  background: #fff;
}
.aiq-history-title { color: #202a50; font-size: 17px; font-weight: 850; }
.aiq-history-subtitle { margin-top: 3px; color: #8a93ae; font-size: 10px; font-weight: 600; }
.aiq-new-chat {
  min-height: 36px;
  flex: 0 0 auto;
  padding: 0 11px;
  border: 0;
  border-radius: 11px;
  color: #fff;
  background: linear-gradient(135deg, var(--aiq-blue), var(--aiq-violet));
  box-shadow: 0 6px 14px rgba(56, 89, 205, .18);
  font: inherit;
  font-size: 12px;
  font-weight: 750;
  cursor: pointer;
}
.aiq-new-chat:disabled { opacity: .45; cursor: not-allowed; }

.aiq-history-list { min-height: 0; flex: 1; overflow-y: auto; padding: 10px; }
.aiq-history-row {
  position: relative;
  display: flex;
  align-items: center;
  margin-bottom: 5px;
  border: 1px solid transparent;
  border-radius: 13px;
  transition: border-color 150ms ease, background 150ms ease;
}
.aiq-history-row:hover { border-color: rgba(70, 94, 180, .12); background: #fff; }
.aiq-history-row[data-active="true"] { border-color: rgba(52,104,239,.2); background: #eef3ff; }
.aiq-history-item {
  min-width: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 11px 37px 11px 11px;
  border: 0;
  color: #303958;
  text-align: left;
  background: transparent;
  cursor: pointer;
}
.aiq-history-item-title { overflow: hidden; font-size: 13px; font-weight: 750; text-overflow: ellipsis; white-space: nowrap; }
.aiq-history-item-meta { color: #929ab3; font-size: 10px; font-weight: 600; }
.aiq-history-delete {
  position: absolute;
  right: 7px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 9px;
  color: #929ab3;
  background: transparent;
  font-size: 18px;
  cursor: pointer;
}
.aiq-history-delete:hover { color: var(--aiq-danger); background: #fff0f2; }
.aiq-history-empty {
  min-height: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 24px;
  color: #8b94ae;
  text-align: center;
}
.aiq-history-empty > span { color: #7657e8; font-size: 24px; }
.aiq-history-empty strong { color: #505b7c; font-size: 13px; }
.aiq-history-empty small { max-width: 190px; font-size: 10px; line-height: 1.5; }
.aiq-history-note { padding: 11px 14px max(12px, env(safe-area-inset-bottom)); border-top: 1px solid var(--aiq-line); color: #969eb6; background: #fff; text-align: center; font-size: 9px; }

.aiq-body {
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 20px 16px 16px;
  background:
    linear-gradient(rgba(244,247,255,.93), rgba(249,250,255,.97)),
    radial-gradient(circle at 1px 1px, rgba(50,78,160,.16) 1px, transparent 1.5px);
  background-size: auto, 18px 18px;
  scroll-behavior: smooth;
}

.aiq-body::-webkit-scrollbar { width: 5px; }
.aiq-body::-webkit-scrollbar-thumb { border-radius: 8px; background: rgba(71, 90, 159, .2); }

.aiq-conversation:empty { display: none; }

.aiq-message { display: flex; align-items: flex-start; gap: 8px; margin-bottom: 14px; }
.aiq-message[data-role="user"] { justify-content: flex-end; }

.aiq-message-avatar {
  width: 26px;
  height: 26px;
  flex: 0 0 26px;
  display: grid;
  place-items: center;
  margin-top: 2px;
  border-radius: 9px;
  color: #5840b5;
  background: #ebe7ff;
  font-size: 13px;
}

.aiq-bubble {
  max-width: 84%;
  padding: 11px 13px;
  border: 1px solid var(--aiq-line);
  border-radius: 6px 16px 16px 16px;
  color: #303958;
  background: #fff;
  box-shadow: 0 6px 18px rgba(49, 65, 122, .07);
  font-size: 14px;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.aiq-message[data-role="assistant"] .aiq-bubble { max-width: calc(100% - 34px); }

.aiq-bubble.aiq-markdown { white-space: normal; }
.aiq-markdown > :first-child { margin-top: 0; }
.aiq-markdown > :last-child { margin-bottom: 0; }
.aiq-markdown p { margin: 0 0 .72em; }
.aiq-markdown strong { color: #202a50; font-weight: 800; }
.aiq-markdown em { color: #424d72; }
.aiq-markdown del { color: #7e86a3; }
.aiq-markdown h1,
.aiq-markdown h2,
.aiq-markdown h3,
.aiq-markdown h4 {
  margin: .9em 0 .4em;
  color: #202a50;
  font-size: 1.05em;
  line-height: 1.4;
  font-weight: 800;
}
.aiq-markdown ul,
.aiq-markdown ol { margin: .35em 0 .78em; padding-left: 1.45em; }
.aiq-markdown li { padding-left: .1em; }
.aiq-markdown li + li { margin-top: .28em; }
.aiq-markdown blockquote {
  margin: .55em 0 .78em;
  padding: .45em .7em;
  border-left: 3px solid #9a8be8;
  border-radius: 0 8px 8px 0;
  color: #586385;
  background: #f5f3ff;
}
.aiq-markdown hr {
  height: 1px;
  margin: .9em 0;
  border: 0;
  background: rgba(73, 91, 160, .16);
}
.aiq-markdown code {
  padding: .12em .35em;
  border-radius: 5px;
  color: #4f3aa8;
  background: #f0edff;
  font: .9em/1.5 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}
.aiq-markdown pre {
  overflow-x: auto;
  margin: .6em 0 .8em;
  padding: .75em .85em;
  border: 1px solid rgba(73, 91, 160, .12);
  border-radius: 10px;
  background: #f7f8fc;
}
.aiq-markdown pre code { padding: 0; color: #303958; background: transparent; }
.aiq-markdown a { color: #315fdb; text-decoration-thickness: 1px; text-underline-offset: 2px; }
.aiq-markdown .katex { color: inherit; font-size: 1.05em; }
.aiq-markdown .katex-display {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  margin: .65em 0;
  padding: 2px 0 5px;
  -webkit-overflow-scrolling: touch;
}
.aiq-markdown .katex-display > .katex { white-space: nowrap; }

.aiq-message[data-role="user"] .aiq-bubble {
  border-color: transparent;
  border-radius: 16px 6px 16px 16px;
  color: #fff;
  background: linear-gradient(135deg, #3468ef, #6455d9);
  box-shadow: 0 8px 20px rgba(55, 88, 205, .18);
}

.aiq-message[data-state="error"] .aiq-bubble {
  border-color: rgba(197,68,88,.2);
  color: var(--aiq-danger);
  background: #fff6f7;
}

.aiq-thinking { display: inline-flex; align-items: center; gap: 4px; min-width: 44px; }
.aiq-thinking i { width: 6px; height: 6px; border-radius: 50%; background: #7280aa; animation: aiq-pulse 1s ease-in-out infinite; }
.aiq-thinking i:nth-child(2) { animation-delay: 120ms; }
.aiq-thinking i:nth-child(3) { animation-delay: 240ms; }

@keyframes aiq-pulse { 0%, 80%, 100% { opacity: .28; transform: translateY(0); } 40% { opacity: 1; transform: translateY(-3px); } }

.aiq-suggestion-block { margin: 2px 0 16px 34px; }
.aiq-suggestion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0 2px 7px;
  color: #5c6787;
  font-size: 11px;
  font-weight: 750;
}
.aiq-suggestion-status { color: #8490b2; font-weight: 650; }
.aiq-suggestion-block[aria-busy="true"] .aiq-suggestion-status { animation: aiq-soft-pulse 1.4s ease-in-out infinite; }
.aiq-suggestions { display: flex; flex-wrap: wrap; gap: 7px; }
.aiq-suggestion {
  padding: 7px 10px;
  border: 1px solid rgba(63, 97, 207, .18);
  border-radius: 999px;
  color: #4460b8;
  background: rgba(255,255,255,.8);
  font-size: 12px;
  font-weight: 650;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}
.aiq-suggestion:hover { color: #2e55d0; border-color: rgba(46,85,208,.34); background: #fff; }
.aiq-suggestion:focus-visible { outline: 3px solid rgba(52,104,239,.24); outline-offset: 2px; }

@keyframes aiq-soft-pulse { 50% { opacity: .45; } }

.aiq-auth {
  margin: 0 0 16px 34px;
  padding: 12px;
  border: 1px solid rgba(75, 102, 188, .15);
  border-radius: 14px;
  background: rgba(255,255,255,.9);
}
.aiq-auth-label { display: block; margin-bottom: 7px; color: #515d81; font-size: 12px; font-weight: 700; }
.aiq-auth-row { display: flex; gap: 7px; }
.aiq-auth input {
  min-width: 0;
  flex: 1;
  height: 36px;
  padding: 0 10px;
  border: 1px solid rgba(71, 91, 164, .2);
  border-radius: 9px;
  color: var(--aiq-ink);
  background: #fff;
  font: inherit;
}
.aiq-auth button {
  padding: 0 12px;
  border: 0;
  border-radius: 9px;
  color: #fff;
  background: var(--aiq-blue);
  font-weight: 750;
  cursor: pointer;
}

.aiq-composer {
  padding: 12px 14px max(14px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--aiq-line);
  background: #fff;
}

.aiq-input-wrap {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 7px 7px 7px 12px;
  border: 1px solid rgba(61, 82, 156, .2);
  border-radius: 16px;
  background: #fafbff;
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}
.aiq-input-wrap:focus-within { border-color: rgba(52,104,239,.48); background: #fff; box-shadow: 0 0 0 4px rgba(52,104,239,.08); }

.aiq-input {
  width: 100%;
  min-height: 38px;
  max-height: 112px;
  resize: none;
  padding: 8px 0;
  border: 0;
  outline: 0 !important;
  color: var(--aiq-ink);
  background: transparent;
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}
.aiq-input::placeholder { color: #9ba3bd; }

.aiq-send {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 12px;
  color: #fff;
  background: linear-gradient(135deg, var(--aiq-blue), var(--aiq-violet));
  box-shadow: 0 7px 16px rgba(56, 89, 205, .22);
  cursor: pointer;
  transition: transform 160ms ease, opacity 160ms ease;
}
.aiq-send:hover { transform: translateY(-1px); }
.aiq-send:disabled { opacity: .42; cursor: not-allowed; transform: none; }
.aiq-send svg { width: 17px; height: 17px; }

.aiq-note { margin: 8px 2px 0; color: #979eb5; text-align: center; font-size: 10px; line-height: 1.35; }

body.aiq-lock-scroll { overflow: hidden !important; }

@media (max-width: 780px) {
  .aiq-launcher-host[data-ai-chat-placement="floating"] {
    top: auto;
    bottom: calc(env(safe-area-inset-bottom, 0px) + 18px);
  }

  .aiq-launcher-host[data-ai-chat-placement="inline"] .aiq-launcher {
    min-width: 40px;
    padding: 0 10px;
  }
  .aiq-launcher-host[data-ai-chat-placement="inline"] .aiq-launcher-label { display: none; }

  .aiq-panel {
    top: max(10px, env(safe-area-inset-top));
    right: 10px;
    bottom: max(10px, env(safe-area-inset-bottom));
    width: calc(100vw - 20px);
    min-height: 0;
    border-radius: 22px;
    transform: translate3d(0, 20px, 0) scale(.985);
  }

  .aiq-header { padding: 15px 15px 14px; }
  .aiq-history-drawer { width: min(320px, 88%); }
  .aiq-body { padding: 17px 13px 13px; }
  .aiq-bubble { max-width: 88%; font-size: 14px; }
  .aiq-suggestion-block, .aiq-auth { margin-left: 0; }
}

@media (max-width: 420px) {
  .aiq-launcher-host[data-ai-chat-placement="floating"] .aiq-launcher {
    width: 44px;
    min-width: 44px;
    padding: 0;
    border-radius: 14px;
  }
  .aiq-launcher-host[data-ai-chat-placement="floating"] .aiq-launcher-label { display: none; }
  .aiq-title { font-size: 16px; }
  .aiq-history-toggle { min-width: 38px; width: 38px; padding: 0; }
  .aiq-history-toggle span { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .aiq-panel, .aiq-backdrop, .aiq-launcher, .aiq-close, .aiq-history-drawer, .aiq-history-shade, .aiq-thinking i, .aiq-suggestion-status { transition: none !important; animation: none !important; }
}