/* ============================================================
   智能客服 widget（全站共享，随 chat-widget.js 使用）
   仅使用 main.css :root tokens，勿硬编码色值/间距
   ============================================================ */

/* ---------- 浮动启动按钮 ---------- */
.chat-launcher {
  position: fixed;
  right: var(--space-5);
  bottom: var(--space-5);
  z-index: 1001;
  width: 56px;
  height: 56px;
  border: none;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow), var(--shadow-glow);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.chat-launcher:hover {
  transform: scale(1.06);
  box-shadow: var(--shadow-hover), var(--shadow-glow);
}

.chat-launcher svg {
  width: 26px;
  height: 26px;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.chat-launcher .chat-icon-close {
  display: none;
}

body.chat-open .chat-launcher .chat-icon-open {
  display: none;
}

body.chat-open .chat-launcher .chat-icon-close {
  display: block;
}

/* ---------- 对话面板 ---------- */
.chat-panel {
  position: fixed;
  right: var(--space-5);
  bottom: calc(var(--space-5) + 72px);
  z-index: 1001;
  width: 380px;
  height: 560px;
  max-height: calc(100vh - 140px);
  max-width: calc(100vw - 32px);
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.18);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(0.98);
  transform-origin: bottom right;
  transition: opacity var(--transition-base), transform var(--transition-base),
    visibility var(--transition-base);
}

body.chat-open .chat-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

/* ---------- 面板头部 ---------- */
.chat-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--gradient-brand);
  color: #fff;
  flex-shrink: 0;
}

.chat-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
}

.chat-avatar svg {
  width: 22px;
  height: 22px;
  color: var(--color-primary-text);
}

.chat-header-text {
  flex: 1;
  min-width: 0;
}

.chat-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.2;
}

.chat-subtitle {
  font-size: 12px;
  opacity: 0.82;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-close {
  background: rgba(255, 255, 255, 0.14);
  border: none;
  color: #fff;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition-fast);
}

.chat-close:hover {
  background: rgba(255, 255, 255, 0.28);
}

.chat-close svg {
  width: 14px;
  height: 14px;
}

/* ---------- 消息区 ---------- */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
  background: var(--color-surface);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.chat-row {
  display: flex;
  gap: var(--space-2);
  max-width: 100%;
}

.chat-row--user {
  justify-content: flex-end;
}

.chat-row--ai .chat-mini-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.chat-row--ai .chat-mini-avatar svg {
  width: 15px;
  height: 15px;
}

.chat-bubble {
  max-width: 82%;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: break-word;
}

.chat-row--user .chat-bubble {
  background: var(--color-primary);
  color: #fff;
  border-bottom-right-radius: var(--space-1);
}

.chat-row--ai .chat-bubble {
  background: var(--color-surface-elevated);
  color: var(--color-text);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  border-bottom-left-radius: var(--space-1);
}

.chat-bubble--error {
  color: #b3261e;
  border-color: rgba(179, 38, 30, 0.25);
}

.chat-human-link {
  color: var(--color-primary-text);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* 打字三点 */
.chat-typing {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 2px;
}

.chat-typing span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-text-muted);
  animation: chat-dot 1.2s infinite ease-in-out;
}

.chat-typing span:nth-child(2) {
  animation-delay: 0.15s;
}

.chat-typing span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes chat-dot {
  0%, 60%, 100% {
    opacity: 0.25;
    transform: translateY(0);
  }
  30% {
    opacity: 1;
    transform: translateY(-3px);
  }
}

/* 快捷问题 */
.chat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-left: 36px; /* 与 AI 气泡左缘对齐 */
}

.chat-chip {
  font: inherit;
  font-size: 12.5px;
  color: var(--color-primary-text);
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-pill);
  padding: 6px 12px;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.chat-chip:hover {
  background: var(--color-primary);
  color: #fff;
}

/* ---------- 输入区 ---------- */
.chat-input-area {
  display: flex;
  align-items: flex-end;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-3) var(--space-2);
  border-top: 1px solid var(--color-border-light);
  background: var(--color-bg);
  flex-shrink: 0;
}

.chat-input {
  flex: 1;
  font: inherit;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 9px 12px;
  resize: none;
  max-height: 96px;
  outline: none;
  transition: border-color var(--transition-fast);
}

.chat-input:focus {
  border-color: var(--color-primary);
}

.chat-send {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.chat-send svg {
  width: 18px;
  height: 18px;
}

.chat-send:hover:not(:disabled) {
  transform: scale(1.05);
}

.chat-send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ---------- 底部免责 ---------- */
.chat-disclaimer {
  padding: var(--space-1) var(--space-3) var(--space-3);
  background: var(--color-bg);
  text-align: center;
  font-size: 11.5px;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.chat-disclaimer a {
  color: var(--color-primary-text);
  text-decoration: none;
}

.chat-disclaimer a:hover {
  text-decoration: underline;
}

/* ---------- 移动端：面板全屏 ---------- */
@media (max-width: 480px) {
  .chat-panel {
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    max-height: 100%;
    max-width: 100%;
    border-radius: 0;
    border: none;
    transform: translateY(100%);
  }

  body.chat-open .chat-panel {
    transform: translateY(0);
  }

  .chat-launcher {
    right: var(--space-4);
    bottom: var(--space-4);
  }

  body.chat-open .chat-launcher {
    display: none; /* 全屏面板下用头部关闭按钮 */
  }
}

/* ---------- 启动按钮「活」起来：入场 + 呼吸光环 + 未读点 ---------- */
@keyframes chat-pop {
  from { opacity: 0; transform: scale(0.6) translateY(10px); }
  to   { opacity: 1; transform: none; }
}

.chat-launcher {
  animation: chat-pop 0.5s var(--ease-out-soft) 0.5s backwards;
}

/* 呼吸光环（向外扩散的脉冲环，提示「在线可点」） */
.chat-launcher::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  pointer-events: none;
  animation: chat-ping 3s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes chat-ping {
  0%        { transform: scale(1);   opacity: 0.5; }
  70%, 100% { transform: scale(1.9); opacity: 0; }
}

body.chat-open .chat-launcher::after {
  animation: none;
  opacity: 0;
}

/* 未读小红点：首次打开后永久消失（body.chat-seen） */
.chat-unread {
  position: absolute;
  top: -3px;
  right: -3px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #ff6b5e;
  border: 2px solid #fff;
  box-shadow: 0 2px 8px rgba(255, 107, 94, 0.5);
  pointer-events: none;
  animation: chat-unread-pulse 1.8s ease-in-out infinite;
}

@keyframes chat-unread-pulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.18); }
}

body.chat-seen .chat-unread {
  display: none;
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .chat-launcher,
  .chat-panel,
  .chat-send,
  .chat-launcher svg,
  .chat-chip,
  .chat-launcher::after,
  .chat-unread {
    transition: none;
    animation: none;
  }

  .chat-launcher::after {
    opacity: 0;
  }

  .chat-typing span {
    animation: none;
    opacity: 0.6;
  }
}