/* 智能客服浮窗 */
.chat-widget {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 1001;
  font-family: inherit;
  --chat-theme: var(--green, #1a7a4c);
  --chat-theme-dark: var(--green-dark, #0f5c38);
}

.chat-widget.chat-left {
  right: auto;
  left: 24px;
}

.chat-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 46, 36, 0.35);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, visibility 0.25s;
  backdrop-filter: blur(2px);
}

.chat-backdrop.visible {
  opacity: 1;
  visibility: visible;
}

body.chat-open {
  overflow: hidden;
}

.chat-toggle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--chat-theme) 0%, var(--chat-theme-dark) 100%);
  color: #fff;
  font-size: 26px;
  cursor: pointer;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
}

.chat-toggle:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 24px color-mix(in srgb, var(--chat-theme) 35%, transparent);
}

.chat-widget.is-open .chat-toggle {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.85);
}

/* 固定于视口，保证完整可见 */
.chat-panel {
  position: fixed;
  right: 24px;
  bottom: 88px;
  top: 12px;
  width: min(400px, calc(100vw - 32px));
  max-height: none;
  height: auto;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.18);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--chat-theme) 12%, transparent);
  z-index: 1002;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(0.98);
  transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
}

.chat-widget.chat-left .chat-panel {
  right: auto;
  left: 24px;
}

.chat-panel.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.chat-panel:not(.is-open) {
  pointer-events: none;
}

.chat-header {
  background: linear-gradient(135deg, var(--chat-theme) 0%, var(--chat-theme-dark) 100%);
  color: #fff;
  padding: 14px 16px 12px;
  flex-shrink: 0;
}

.chat-header-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.chat-header h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.35;
  flex: 1;
  padding-right: 4px;
}

.chat-header p {
  margin: 0;
  font-size: 12px;
  opacity: 0.92;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.chat-learn-tag {
  display: inline-block;
  margin-top: 8px;
  padding: 3px 10px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  font-size: 11px;
}

.chat-close {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
  min-width: 32px;
  height: 32px;
  padding: 0 10px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  transition: background 0.2s;
}

.chat-close:hover {
  background: rgba(255, 255, 255, 0.35);
}

.chat-close-text {
  font-size: 12px;
  font-weight: 500;
}

.chat-messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 14px;
  background: #f7faf8;
  display: flex;
  flex-direction: column;
  gap: 10px;
  -webkit-overflow-scrolling: touch;
}

.chat-msg {
  max-width: 88%;
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}

.chat-msg.user {
  align-self: flex-end;
  background: var(--chat-theme);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.chat-msg.bot {
  align-self: flex-start;
  background: #fff;
  color: var(--dark);
  border: 1px solid #e5ebe7;
  border-bottom-left-radius: 4px;
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.chat-msg.typing {
  color: #888;
  font-style: italic;
}

.chat-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 8px 12px;
  background: #fff;
  border-top: 1px solid #eef2ef;
  flex-shrink: 0;
  max-height: 88px;
  overflow-y: auto;
}

.chat-quick button {
  border: 1px solid color-mix(in srgb, var(--chat-theme) 20%, #fff);
  background: color-mix(in srgb, var(--chat-theme) 8%, #fff);
  color: var(--chat-theme-dark);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  cursor: pointer;
}

.chat-quick button:hover {
  background: var(--chat-theme);
  color: #fff;
  border-color: var(--chat-theme);
}

.chat-input-row {
  display: flex;
  gap: 8px;
  padding: 10px 12px;
  background: #fff;
  border-top: 1px solid #eef2ef;
  flex-shrink: 0;
}

.chat-input-row input {
  flex: 1;
  min-width: 0;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  outline: none;
}

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

.chat-input-row button {
  flex-shrink: 0;
  padding: 0 16px;
  border: none;
  border-radius: 8px;
  background: var(--chat-theme);
  color: #fff;
  font-size: 14px;
  cursor: pointer;
}

.chat-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.chat-input-row button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.chat-panel-footer {
  flex-shrink: 0;
  padding: 6px 12px 10px;
  text-align: center;
  background: #fff;
  border-top: 1px solid #eef2ef;
}

.chat-panel-footer button {
  border: none;
  background: none;
  color: var(--gray-500, #6b7c72);
  font-size: 12px;
  cursor: pointer;
  padding: 4px 8px;
}

.chat-panel-footer button:hover {
  color: var(--chat-theme);
}

@media (max-width: 480px) {
  .chat-widget,
  .chat-widget.chat-left {
    right: 12px;
    left: auto;
    bottom: calc(12px + env(safe-area-inset-bottom, 0px));
  }

  .chat-widget.chat-left {
    left: 12px;
    right: auto;
  }

  .chat-panel,
  .chat-widget.chat-left .chat-panel {
    right: 8px;
    left: 8px;
    bottom: calc(72px + env(safe-area-inset-bottom, 0px));
    top: max(12px, env(safe-area-inset-top, 12px));
    width: auto;
    border-radius: 14px;
  }

  .float-phone {
    bottom: calc(80px + env(safe-area-inset-bottom, 0px));
    right: 12px;
  }

  .chat-toggle {
    width: 52px;
    height: 52px;
  }
}