/* ============================================================
   规则问答助手 — Web 悬浮面板 + /assistant 直达页
   与全站主题变量共用；不依赖 quick-nav 的滚动显隐。
   ============================================================ */

.assistant-fab {
  position: fixed;
  right: 16px;
  bottom: calc(16px + env(safe-area-inset-bottom));
  z-index: 61;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 48px;
  padding: 0 16px 0 12px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--brand) 38%, var(--line));
  background: var(--bg-card);
  color: var(--text);
  font-size: var(--fs-md);
  font-weight: 600;
  box-shadow: 0 10px 28px rgba(15, 15, 26, .18);
  cursor: pointer;
}
.assistant-fab:hover { border-color: color-mix(in srgb, var(--brand) 62%, var(--line)); }
.assistant-fab:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(249, 115, 22, .28), 0 10px 28px rgba(15, 15, 26, .18); }
.assistant-fab svg { width: 20px; height: 20px; flex: none; }
.assistant-fab-dot {
  position: absolute; top: 6px; right: 8px; width: 8px; height: 8px; border-radius: 50%;
  background: var(--brand); box-shadow: 0 0 0 2px var(--bg-card);
}
.assistant-fab[hidden] { display: none !important; }

/* ── 桌面胶囊手势：拖拽换位 + 贴边隐藏 ────────────────────────
   按住胶囊拖动，松手后吸附到较近的左右边缘，再滑出屏幕只留 52px（.docked）；
   悬停/聚焦时滑回完整胶囊，点击弹回原位并打开面板。
   位置与贴边状态由 assistant.js 存 localStorage，刷新后保持。 */
.assistant-fab {
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  transition: transform .2s ease;
}
.assistant-fab.dragging {
  transition: none;
  transform: none !important;
  cursor: grabbing;
  box-shadow: 0 16px 36px rgba(15, 15, 26, .26);
}
.assistant-fab.snapping { transition: left .2s ease, top .2s ease, transform .2s ease; }
.assistant-fab.docked.side-right { transform: translateX(calc(100% - 52px)); }
.assistant-fab.docked.side-right .assistant-fab-dot { right: auto; left: 8px; }
.assistant-fab.docked.side-left {
  transform: translateX(calc(52px - 100%));
  flex-direction: row-reverse;
  padding: 0 12px 0 16px;
}
.assistant-fab.docked:hover,
.assistant-fab.docked:focus-visible { transform: translateX(0); }

/* ── 移动底栏「问小助手」圆形岛屿 ──────────────────────────────
   与小程序 components/bottom-nav 的 .assistant-island 同款：56px 圆钮、
   品牌橙描边、独立阴影，排在玻璃胶囊左侧；图标是三点 + 尾巴拼的对话气泡。
   桌面仍用上面的文字胶囊，手机端只保留这一个入口，避免和底栏重叠。 */
.assistant-island {
  display: none;
  position: relative;
  flex: 0 0 56px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 1px solid rgba(249, 115, 22, .42);
  background: rgba(255, 255, 255, .72);
  box-shadow: 0 8px 24px rgba(15, 23, 42, .16), inset 0 2px 0 rgba(255, 255, 255, .35);
  box-sizing: border-box;
  align-items: center;
  justify-content: center;
  color: #ea580c;
  transition: transform .16s ease, border-color .16s ease;
  -webkit-tap-highlight-color: transparent;
}
.assistant-island:hover { transform: scale(.94); border-color: rgba(249, 115, 22, .72); }
.assistant-island:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(249, 115, 22, .28), 0 8px 24px rgba(15, 23, 42, .16);
}
html[data-theme="dark"] .assistant-island {
  background: rgba(30, 30, 46, .74);
  border-color: rgba(251, 146, 60, .45);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .38), inset 0 2px 0 rgba(255, 255, 255, .08);
  color: #fb923c;
}
.assistant-glyph { position: relative; display: block; width: 27px; height: 25px; color: inherit; }
.assistant-glyph-body {
  position: absolute;
  top: 0;
  left: 1px;
  width: 24px;
  height: 18px;
  border-radius: 6px;
  background: currentColor;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
}
.assistant-glyph-dot { width: 3px; height: 3px; border-radius: 50%; background: rgba(255, 255, 255, .92); }
html[data-theme="dark"] .assistant-glyph-dot { background: rgba(17, 24, 39, .9); }
.assistant-glyph-tail {
  position: absolute;
  left: 6px;
  bottom: 2px;
  width: 8px;
  height: 8px;
  background: currentColor;
  border-radius: 0 0 3px 0;
  transform: skewX(-28deg) rotate(18deg);
}
@media (max-width: 1023px) {
  .assistant-island { display: flex; }
  /* 手机端入口已并入底栏；右下角这颗文字胶囊会和胶囊底栏叠在一起 */
  .assistant-fab { display: none; }
}

@media (min-width: 1024px) {
  /* 桌面右下角已被 quick-nav（right 24 / bottom 24 / 玻璃卡片按钮）占用，按钮排在它左侧。 */
  .assistant-fab { right: 76px; bottom: 24px; }
}

.assistant-panel {
  position: fixed;
  right: 24px;
  bottom: 88px;
  z-index: 62;
  display: flex;
  flex-direction: column;
  width: 384px;
  max-width: calc(100vw - 32px);
  height: min(640px, calc(100dvh - 128px));
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--bg-card);
  color: var(--text);
  box-shadow: 0 24px 60px rgba(15, 15, 26, .26);
  overflow: hidden;
}
.assistant-panel[hidden] { display: none !important; }

@media (max-width: 719px) {
  /* 窄屏近全屏：留出安全区与顶部状态栏，不用浮层挤成一列小窗。 */
  .assistant-panel {
    inset: calc(8px + env(safe-area-inset-top)) 8px calc(8px + env(safe-area-inset-bottom)) 8px;
    width: auto;
    height: auto;
    max-width: none;
    right: 8px;
    bottom: calc(8px + env(safe-area-inset-bottom));
    border-radius: 16px;
    /* 底栏 z-index 120；近全屏面板要盖住它，否则胶囊会浮在对话框输入区上方 */
    z-index: 200;
  }
}

.assistant-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 12px 12px 16px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg-soft) 60%, var(--bg-card));
  flex: none;
}
.assistant-title { font-size: var(--fs-base); font-weight: 700; margin: 0; flex: 1; }
.assistant-sub { display: block; font-size: var(--fs-xs); font-weight: 400; color: var(--text-3); margin-top: 2px; }
.assistant-iconbtn {
  width: 32px; height: 32px; flex: none; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid transparent; border-radius: 9px; background: transparent; color: var(--text-2);
  font-size: var(--fs-base); line-height: 1; cursor: pointer;
}
.assistant-iconbtn:hover { background: var(--bg-hover); color: var(--text); }
.assistant-iconbtn:focus-visible { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(249, 115, 22, .22); }

.assistant-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 14px 14px 8px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  -webkit-overflow-scrolling: touch;
}

.assistant-msg { display: flex; flex-direction: column; gap: 6px; max-width: 100%; }
.assistant-msg-user { align-items: flex-end; }
.assistant-bubble {
  max-width: 88%;
  padding: 10px 12px;
  border-radius: 14px;
  font-size: var(--fs-md);
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
}
.assistant-msg-bot .assistant-bubble { background: var(--bg-soft); border: 1px solid var(--line); border-top-left-radius: 6px; }
.assistant-msg-user .assistant-bubble { background: var(--btn-brand-grad); color: #fff; border-top-right-radius: 6px; }
.assistant-msg-err .assistant-bubble { background: rgba(239, 68, 68, .09); border-color: rgba(239, 68, 68, .28); color: var(--text); }
.assistant-lead { font-weight: 600; font-size: var(--fs-base); }
.assistant-detail { margin-top: 6px; font-size: var(--fs-sm); line-height: 1.6; opacity: .82; white-space: pre-wrap; word-break: break-word; }
.assistant-msg-user .assistant-detail { opacity: .92; }

.assistant-items { display: flex; flex-direction: column; gap: 6px; }
.assistant-item {
  display: block;
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-card);
  color: var(--text);
  font-size: var(--fs-sm);
  line-height: 1.55;
  text-align: left;
  text-decoration: none;
}
a.assistant-item:hover { border-color: color-mix(in srgb, var(--brand) 45%, var(--line)); }
.assistant-item b { font-weight: 600; }
.assistant-item span { display: block; color: var(--text-3); font-size: var(--fs-xs); margin-top: 2px; }

.assistant-choices { display: flex; flex-wrap: wrap; gap: 6px; }
.assistant-choice {
  padding: 6px 11px;
  border-radius: 999px;
  border: 1px solid var(--btn-secondary-line);
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-fg);
  font-size: var(--fs-sm);
  cursor: pointer;
}
.assistant-choice:hover { background: var(--btn-secondary-bg-hover); border-color: var(--btn-secondary-line-hover); }
.assistant-choice:focus-visible { outline: none; box-shadow: var(--btn-ring); }

/* 「打开 XX」比普通候选更像主操作：加粗、整块留白，但仍是一次明确的点击。 */
.assistant-nav {
  display: inline-block;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--btn-secondary-line-hover);
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-fg);
  font-size: var(--fs-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.assistant-nav:hover { background: var(--btn-secondary-bg-hover); border-color: var(--btn-secondary-line-hover); }
.assistant-nav:focus-visible { outline: none; box-shadow: var(--btn-ring); }
.assistant-nav-off { opacity: .7; font-weight: 400; cursor: default; }

.assistant-meta { font-size: var(--fs-xs); color: var(--text-3); line-height: 1.5; }
.assistant-meta a { color: var(--text-3); text-decoration: underline; }

.assistant-examples { display: flex; flex-direction: column; gap: 6px; }
.assistant-example {
  padding: 8px 10px;
  border: 1px dashed var(--line);
  border-radius: 10px;
  background: transparent;
  color: var(--text-2);
  font-size: var(--fs-sm);
  text-align: left;
  cursor: pointer;
}
.assistant-example:hover { border-color: color-mix(in srgb, var(--brand) 40%, var(--line)); color: var(--text); }

.assistant-foot { flex: none; padding: 10px 12px calc(10px + env(safe-area-inset-bottom)); border-top: 1px solid var(--line); background: var(--bg-card); }
.assistant-form { display: flex; align-items: flex-end; gap: 8px; }
.assistant-input {
  flex: 1;
  min-height: 40px;
  max-height: 132px;
  resize: none;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-soft);
  color: var(--text);
  font: inherit;
  font-size: var(--fs-md);
  line-height: 1.5;
}
.assistant-input:focus { outline: none; border-color: var(--brand); box-shadow: var(--btn-ring); background: var(--bg-card); }
.assistant-input::placeholder { color: var(--text-3); }
.assistant-send {
  flex: none;
  height: 40px;
  padding: 0 16px;
  border: 0;
  border-radius: 12px;
  background: var(--btn-brand-grad);
  color: #fff;
  font-size: var(--fs-md);
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--btn-brand-shadow);
}
.assistant-send:hover { background: var(--btn-brand-grad-hover); }
.assistant-send:disabled { opacity: .5; cursor: default; box-shadow: none; }
.assistant-status { margin: 6px 2px 0; font-size: var(--fs-xs); color: var(--text-3); min-height: 14px; }

/* 直达页：正文里的同一套对话，不套浮层。 */
.assistant-page { max-width: 760px; margin: 0 auto; padding: 18px 16px calc(32px + env(safe-area-inset-bottom)); }
.assistant-page-lead { margin: 0 0 4px; font-size: var(--fs-2xl); font-weight: 700; }
.assistant-page-sub { margin: 0 0 16px; color: var(--text-2); font-size: var(--fs-md); line-height: 1.7; }
.assistant-card {
  position: static;
  inset: auto;
  width: auto;
  max-width: none;
  height: auto;
  box-shadow: none;
  display: flex;
  flex-direction: column;
  min-height: min(620px, calc(100dvh - 220px));
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--bg-card);
  overflow: hidden;
}
.assistant-card .assistant-head { padding-left: 18px; }
.assistant-card .assistant-body { padding: 16px 16px 8px; }
.assistant-card .assistant-foot { padding: 12px 16px calc(14px + env(safe-area-inset-bottom)); }
.assistant-page-note { margin: 12px 2px 0; font-size: var(--fs-xs); color: var(--text-3); line-height: 1.7; }

@media (prefers-reduced-motion: no-preference) {
  .assistant-panel { animation: assistant-in .16s ease-out; }
  @keyframes assistant-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
}