/**
 * 样式注入模块 - CSS 自动注入，csk- 命名空间隔离
 *
 * 设计语言：现代克制、柔和阴影、圆角气泡、主色渐变、入场动效。
 * 主题色由配置驱动，通过 CSS 变量透传，可在运行时热替换。
 */
import { ResolvedConfig } from './types';

let styleElement: HTMLStyleElement | null = null;

/** 将 hex 颜色解析为 "r, g, b" 字符串，用于 rgba() 拼接 */
function hexToRgb(hex: string): string {
  const match = hex.match(/^#([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/);
  if (!match) return '79, 70, 229';
  return `${parseInt(match[1], 16)}, ${parseInt(match[2], 16)}, ${parseInt(match[3], 16)}`;
}

/** CSS 变量：将配置中的主题色转换为 CSS 自定义属性 */
function cssVars(config: ResolvedConfig): string {
  const darker = adjustColor(config.primaryColor, -15);
  const lighter = adjustColor(config.primaryColor, 18);
  const rgb = hexToRgb(config.primaryColor);

  return `
    --csk-primary: ${config.primaryColor};
    --csk-primary-hover: ${darker};
    --csk-primary-light: ${lighter};
    --csk-primary-rgb: ${rgb};
    --csk-bg-user: linear-gradient(135deg, ${config.primaryColor}, ${darker});
    --csk-bg-ai: #ffffff;
    --csk-text-user: #ffffff;
    --csk-text-ai: #1F2937;
    --csk-window-width: ${config.width}px;
    --csk-window-height: ${config.height}px;
    --csk-radius: 16px;
    --csk-shadow-window: 0 12px 48px rgba(15, 23, 42, 0.18), 0 2px 8px rgba(15, 23, 42, 0.06);
    --csk-shadow-bubble: 0 1px 2px rgba(15, 23, 42, 0.06);
    --csk-border: #ECEEF2;
    --csk-bg-app: #F6F7F9;
  `;
}

/** 简单的颜色加深（按通道加减） */
function adjustColor(hex: string, amount: number): string {
  const match = hex.match(/^#([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/);
  if (!match) {
    return hex;
  }
  const clamp = (v: number) => Math.max(0, Math.min(255, v));
  const r = clamp(parseInt(match[1], 16) + amount);
  const g = clamp(parseInt(match[2], 16) + amount);
  const b = clamp(parseInt(match[3], 16) + amount);
  return `#${r.toString(16).padStart(2, '0')}${g.toString(16).padStart(2, '0')}${b.toString(16).padStart(2, '0')}`;
}

/** 完整 CSS 样式表 */
function getStyles(config: ResolvedConfig): string {
  return `
/* ChatbotSDK 样式 - csk- 命名空间 */
.csk-root {
  ${cssVars(config)}
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.55;
  color: #1F2937;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  box-sizing: border-box;
}
.csk-root *, .csk-root *::before, .csk-root *::after { box-sizing: border-box; }

/* ========== 悬浮按钮 ========== */
.csk-launcher {
  position: fixed;
  bottom: 24px;
  z-index: 9998;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  /* 白色背景，简洁克制 */
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #fff;
  user-select: none;
  overflow: hidden;
  /* 浅灰边框 */
  border: 2px solid #E5E7EB;
  /* 简洁柔和阴影 */
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.08),
    0 4px 16px rgba(0, 0, 0, 0.06);
  transition:
    transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow 0.25s ease,
    border-color 0.25s ease;
  animation:
    csk-launcher-in 0.55s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.csk-launcher--right { right: 24px; }
.csk-launcher--left { left: 24px; }

.csk-launcher:hover {
  transform: translateY(-3px) scale(1.08);
  border-color: #D1D5DB;
  box-shadow:
    0 4px 12px rgba(0, 0, 0, 0.10),
    0 8px 24px rgba(0, 0, 0, 0.08);
}
.csk-launcher:active { transform: scale(0.93); }
.csk-launcher svg {
  width: 30px;
  height: 30px;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.15));
}
.csk-launcher img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  position: relative;
  z-index: 1;
  -webkit-user-drag: none;
  user-select: none;
}

@keyframes csk-launcher-in {
  0% { opacity: 0; transform: scale(0.5) translateY(16px); }
  60% { transform: scale(1.06) translateY(-2px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

/* ========== 聊天弹窗 ========== */
.csk-window {
  position: fixed;
  bottom: 24px;
  z-index: 9999;
  width: var(--csk-window-width);
  height: var(--csk-window-height);
  max-height: calc(100vh - 48px);
  background: #fff;
  border-radius: var(--csk-radius);
  box-shadow: var(--csk-shadow-window);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform-origin: bottom right;
  transition: opacity 0.24s ease, transform 0.24s cubic-bezier(0.34, 1.2, 0.64, 1), visibility 0.24s;
  opacity: 1;
  transform: translateY(0) scale(1);
  visibility: visible;
  pointer-events: auto;
}
.csk-window--right { right: 24px; transform-origin: bottom right; }
.csk-window--left { left: 24px; transform-origin: bottom left; }
.csk-window--hidden {
  opacity: 0;
  transform: translateY(12px) scale(0.96);
  visibility: hidden;
  pointer-events: none;
}

/* ========== 水印层 ========== */
.csk-watermark {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  user-select: none;
  z-index: 0;
  background-repeat: repeat;
  opacity: 0.8;
}

/* ========== 头部 ========== */
.csk-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  min-height: 60px;
  background: var(--csk-bg-user);
  color: #fff;
  cursor: move;
  user-select: none;
  position: relative;
  flex-shrink: 0;
}
.csk-header::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 24px;
  background: linear-gradient(to bottom, rgba(0,0,0,0.04), transparent);
  pointer-events: none;
}
.csk-header__left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.csk-header__avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.25);
}
.csk-header__avatar svg { width: 22px; height: 22px; }
.csk-header__info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.csk-header__title {
  font-size: 15px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: 0.2px;
}
.csk-header__status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11.5px;
  opacity: 0.9;
  margin-top: 2px;
}
.csk-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #6EE7B7;
  box-shadow: 0 0 0 0 rgba(110, 231, 183, 0.7);
  animation: csk-status-pulse 2s infinite;
}
@keyframes csk-status-pulse {
  0% { box-shadow: 0 0 0 0 rgba(110, 231, 183, 0.7); }
  70% { box-shadow: 0 0 0 6px rgba(110, 231, 183, 0); }
  100% { box-shadow: 0 0 0 0 rgba(110, 231, 183, 0); }
}
.csk-header__actions {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}
.csk-header__btn,
.csk-history-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: #fff;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.15s, transform 0.15s;
}
.csk-header__btn:hover,
.csk-history-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}
.csk-header__btn:active,
.csk-history-btn:active { transform: scale(0.92); }

/* ========== 角色选择器 ========== */
.csk-role-select-wrap {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  margin: 0 4px;
}
.csk-role-select {
  appearance: none;
  -webkit-appearance: none;
  padding: 4px 24px 4px 10px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.15) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='white' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat right 6px center;
  color: #fff;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  outline: none;
  transition: background 0.15s, border-color 0.15s;
  max-width: 120px;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.csk-role-select:hover {
  background-color: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.55);
}
.csk-role-select:focus {
  border-color: rgba(255, 255, 255, 0.7);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.2);
}
.csk-role-select option {
  color: #1F2937;
  background: #fff;
}

/* ========== 消息区 ========== */
.csk-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 16px 12px;
  background: var(--csk-bg-app);
  scroll-behavior: smooth;
}
.csk-messages::-webkit-scrollbar { width: 6px; }
.csk-messages::-webkit-scrollbar-track { background: transparent; }
.csk-messages::-webkit-scrollbar-thumb {
  background: #D8DCE3;
  border-radius: 3px;
}
.csk-messages::-webkit-scrollbar-thumb:hover { background: #C2C7D0; }

/* 离线提示横幅 */
.csk-offline-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 12px;
  margin: 0 0 8px 0;
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.5;
  background: #FEF2F2;
  color: #991B1B;
  border: 1px solid #FECACA;
}
.csk-dark .csk-offline-banner {
  background: #450A0A;
  color: #FCA5A5;
  border-color: #7F1D1D;
}

/* 欢迎空状态 */
.csk-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px 24px 32px;
  color: #6B7280;
  animation: csk-fade-in 0.3s ease;
}
.csk-welcome__avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--csk-bg-user);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  box-shadow: 0 6px 18px rgba(var(--csk-primary-rgb), 0.3);
}
.csk-welcome__avatar svg { width: 30px; height: 30px; }
.csk-welcome__title {
  font-size: 15px;
  font-weight: 600;
  color: #1F2937;
  margin-bottom: 4px;
}
.csk-welcome__desc {
  font-size: 13px;
  color: #9CA3AF;
  line-height: 1.6;
}

/* 消息气泡 */
.csk-msg {
  display: flex;
  margin-bottom: 18px;
  max-width: 100%;
  word-break: break-word;
  animation: csk-msg-in 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}
.csk-msg--user {
  flex-direction: row-reverse;
  align-items: flex-end;
}
.csk-msg--ai {
  flex-direction: row;
  align-items: flex-start;
}
.csk-msg__avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin: 0 8px;
  box-shadow: var(--csk-shadow-bubble);
}
.csk-msg__avatar svg { width: 18px; height: 18px; }
.csk-msg__avatar--ai {
  background: #fff;
  color: var(--csk-primary);
  border: 1px solid var(--csk-border);
}
.csk-msg__avatar--user {
  background: var(--csk-bg-user);
  color: #fff;
}
.csk-msg__content {
  display: flex;
  flex-direction: column;
  min-width: 0;
  max-width: calc(100% - 46px);
}
.csk-msg--user .csk-msg__content { align-items: flex-end; }
.csk-msg--ai .csk-msg__content { align-items: flex-start; }
.csk-msg__bubble {
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.6;
  box-shadow: var(--csk-shadow-bubble);
}
.csk-msg--user .csk-msg__bubble {
  background: var(--csk-bg-user);
  color: var(--csk-text-user);
  border-radius: 16px 16px 4px 16px;
}
.csk-msg--ai .csk-msg__bubble {
  background: var(--csk-bg-ai);
  color: var(--csk-text-ai);
  border-radius: 16px 16px 16px 4px;
  border: 1px solid var(--csk-border);
}
.csk-msg__time {
  font-size: 11px;
  color: #9CA3AF;
  margin-top: 5px;
  padding: 0 4px;
}

@keyframes csk-msg-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes csk-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ========== Loading 动画 ========== */
.csk-loading {
  display: flex;
  align-items: center;
  margin-bottom: 18px;
  animation: csk-msg-in 0.28s ease;
}
.csk-loading__avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #fff;
  color: var(--csk-primary);
  border: 1px solid var(--csk-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin: 0 8px;
  box-shadow: var(--csk-shadow-bubble);
}
.csk-loading__avatar svg { width: 18px; height: 18px; }
.csk-loading__bubble {
  background: #fff;
  border: 1px solid var(--csk-border);
  border-radius: 16px 16px 16px 4px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 5px;
}
.csk-loading__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #B4B9C2;
  animation: csk-bounce 1.4s ease-in-out infinite both;
}
.csk-loading__dot:nth-child(1) { animation-delay: 0s; }
.csk-loading__dot:nth-child(2) { animation-delay: 0.16s; }
.csk-loading__dot:nth-child(3) { animation-delay: 0.32s; }

@keyframes csk-bounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.6; }
  40% { transform: scale(1); opacity: 1; }
}

/* ========== 输入区 ========== */
.csk-input-area {
  padding: 10px 12px 14px;
  background: #fff;
  border-top: 1px solid var(--csk-border);
  flex-shrink: 0;
}
.csk-input-wrap {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  background: var(--csk-bg-app);
  border: 1px solid var(--csk-border);
  border-radius: 14px;
  padding: 6px 6px 6px 14px;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.csk-input-wrap--focus {
  border-color: var(--csk-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(var(--csk-primary-rgb), 0.12);
}
.csk-input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px 0;
  font-size: 14px;
  outline: none;
  font-family: inherit;
  resize: none;
  min-height: 22px;
  max-height: 120px;
  line-height: 1.5;
  color: #1F2937;
}
.csk-input::placeholder { color: #9CA3AF; }
.csk-root .csk-input:focus-visible { outline: none; }
.csk-send-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  min-width: 36px;
  border: none;
  border-radius: 10px;
  background: var(--csk-bg-user);
  color: #fff;
  cursor: pointer;
  transition: transform 0.18s, box-shadow 0.18s, opacity 0.18s;
  box-shadow: 0 3px 10px rgba(var(--csk-primary-rgb), 0.3);
}
.csk-send-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 5px 14px rgba(var(--csk-primary-rgb), 0.4);
}
.csk-send-btn:active:not(:disabled) { transform: scale(0.92); }
.csk-send-btn:disabled {
  background: #D1D5DB;
  box-shadow: none;
  cursor: not-allowed;
  opacity: 0.7;
}
.csk-send-btn svg { width: 18px; height: 18px; }

/* ========== 保密声明脚注 ========== */
.csk-disclaimer {
  margin-top: 8px;
  padding: 6px 8px 4px;
  font-size: 10px;
  color: #9CA3AF;
  line-height: 1.5;
  user-select: none;
}
.csk-disclaimer__title {
  font-weight: 600;
  margin-bottom: 2px;
  color: #9CA3AF;
}
.csk-dark .csk-disclaimer { color: #6B7280; }
.csk-dark .csk-disclaimer__title { color: #6B7280; }

/* ========== 新对话按钮 ========== */
.csk-clear-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border: 1px solid var(--csk-border);
  border-radius: 999px;
  background: #fff;
  color: #6B7280;
  font-size: 12px;
  cursor: pointer;
  margin: 0 auto 8px;
  transition: all 0.15s;
  font-family: inherit;
}
.csk-clear-btn:hover {
  background: #FEF2F2;
  border-color: #FCA5A5;
  color: #DC2626;
}

/* ========== P1: 知识库分类下拉 ========== */
.csk-category-bar {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  border-top: 1px solid var(--csk-border);
  background: #FBFBFC;
  gap: 8px;
  flex-shrink: 0;
}
.csk-category-bar__label {
  font-size: 13px;
  white-space: nowrap;
}
.csk-category-select {
  flex: 1;
  padding: 6px 28px 6px 10px;
  border: 1px solid var(--csk-border);
  border-radius: 8px;
  font-size: 12.5px;
  color: #374151;
  background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239CA3AF' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E") no-repeat right 9px center;
  appearance: none;
  -webkit-appearance: none;
  outline: none;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  max-width: 220px;
}
.csk-category-select:focus {
  border-color: var(--csk-primary);
  box-shadow: 0 0 0 3px rgba(var(--csk-primary-rgb), 0.12);
}

/* ========== P1: RAG 引用来源卡片 ========== */
.csk-sources {
  margin-top: 8px;
  border: 1px solid var(--csk-border);
  border-radius: 12px;
  overflow: hidden;
  font-size: 12px;
  max-width: 100%;
  background: #FAFBFC;
}
.csk-sources__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: #F3F4F7;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s;
}
.csk-sources__header:hover { background: #ECEEF2; }
.csk-sources__title {
  display: flex;
  align-items: center;
  gap: 5px;
  font-weight: 500;
  color: #374151;
}
.csk-sources__arrow {
  transition: transform 0.2s;
  color: #9CA3AF;
  font-size: 10px;
}
.csk-sources--collapsed .csk-sources__arrow { transform: rotate(-90deg); }
.csk-sources__body {
  border-top: 1px solid var(--csk-border);
  padding: 0;
}
.csk-sources--collapsed .csk-sources__body { display: none; }
.csk-source-item {
  padding: 9px 12px;
  border-bottom: 1px solid #F0F1F4;
  transition: background 0.15s;
}
.csk-source-item:last-child { border-bottom: none; }
.csk-source-item:hover { background: #fff; }
.csk-source-item__name {
  font-weight: 500;
  color: #1F2937;
  margin-bottom: 3px;
}
.csk-source-item__snippet {
  color: #6B7280;
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.csk-source-item__meta {
  font-size: 11px;
  color: #9CA3AF;
  margin-top: 4px;
}

/* ========== P1: Markdown 渲染样式 ========== */
.csk-msg--ai .csk-msg__bubble .csk-md-p { margin: 0 0 8px; }
.csk-msg--ai .csk-msg__bubble .csk-md-p:last-child { margin-bottom: 0; }
.csk-msg--ai .csk-msg__bubble .csk-md-h1,
.csk-msg--ai .csk-msg__bubble .csk-md-h2,
.csk-msg--ai .csk-msg__bubble .csk-md-h3,
.csk-msg--ai .csk-msg__bubble .csk-md-h4,
.csk-msg--ai .csk-msg__bubble .csk-md-h5,
.csk-msg--ai .csk-msg__bubble .csk-md-h6 {
  margin: 14px 0 6px;
  font-weight: 600;
  line-height: 1.3;
  color: #111827;
}
.csk-msg--ai .csk-msg__bubble .csk-md-h1 { font-size: 20px; }
.csk-msg--ai .csk-msg__bubble .csk-md-h2 { font-size: 17px; }
.csk-msg--ai .csk-msg__bubble .csk-md-h3 { font-size: 15px; }
.csk-msg--ai .csk-msg__bubble .csk-md-h4 { font-size: 14px; }

.csk-md-code-block {
  position: relative;
  background: #1E293B;
  color: #E2E8F0;
  padding: 12px 14px;
  border-radius: 10px;
  overflow-x: auto;
  margin: 8px 0;
  font-size: 13px;
  line-height: 1.55;
  font-family: 'SF Mono', 'Consolas', 'Menlo', 'Monaco', monospace;
}
.csk-md-code-block code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
  color: inherit;
}
.csk-md-inline-code {
  background: rgba(var(--csk-primary-rgb), 0.1);
  color: var(--csk-primary);
  padding: 1px 6px;
  border-radius: 5px;
  font-size: 13px;
  font-family: 'SF Mono', 'Consolas', 'Menlo', 'Monaco', monospace;
}
.csk-msg--ai .csk-msg__bubble .csk-md-ul,
.csk-msg--ai .csk-msg__bubble .csk-md-ol {
  padding-left: 22px;
  margin: 6px 0;
}
.csk-msg--ai .csk-msg__bubble .csk-md-ul li,
.csk-msg--ai .csk-msg__bubble .csk-md-ol li { margin-bottom: 4px; }
.csk-md-blockquote {
  border-left: 3px solid var(--csk-primary);
  padding: 2px 12px;
  margin: 8px 0;
  color: #6B7280;
  background: rgba(var(--csk-primary-rgb), 0.05);
  border-radius: 0 6px 6px 0;
}
.csk-md-link {
  color: var(--csk-primary);
  text-decoration: none;
  border-bottom: 1px solid rgba(var(--csk-primary-rgb), 0.3);
  transition: border-color 0.15s;
}
.csk-md-link:hover { border-bottom-color: var(--csk-primary); }
.csk-md-hr {
  border: none;
  border-top: 1px solid var(--csk-border);
  margin: 12px 0;
}
.csk-md-table-wrap {
  max-width: 100%;
  overflow-x: auto;
  margin: 10px 0;
  border: 1px solid var(--csk-border);
  border-radius: 8px;
}
.csk-md-table {
  width: 100%;
  min-width: 360px;
  border-collapse: collapse;
  font-size: 12.5px;
  line-height: 1.5;
}
.csk-md-table th,
.csk-md-table td {
  padding: 7px 9px;
  border-right: 1px solid var(--csk-border);
  border-bottom: 1px solid var(--csk-border);
  text-align: left;
  vertical-align: top;
}
.csk-md-table th:last-child,
.csk-md-table td:last-child { border-right: none; }
.csk-md-table tbody tr:last-child td { border-bottom: none; }
.csk-md-table th {
  background: rgba(var(--csk-primary-rgb), 0.07);
  color: #374151;
  font-weight: 600;
}
.csk-md-table tbody tr:nth-child(even) {
  background: rgba(148, 163, 184, 0.06);
}
.csk-md-table .csk-md-align-left { text-align: left; }
.csk-md-table .csk-md-align-center { text-align: center; }
.csk-md-table .csk-md-align-right { text-align: right; }

/* ========== P2: 会话管理面板 ========== */
.csk-history-panel {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: #fff;
  z-index: 10;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: csk-slide-in 0.24s ease;
}
.csk-history-panel--hidden { display: none; }
@keyframes csk-slide-in {
  from { transform: translateX(100%); opacity: 0.4; }
  to { transform: translateX(0); opacity: 1; }
}
.csk-history-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--csk-border);
  background: var(--csk-bg-app);
  flex-shrink: 0;
}
.csk-history-panel__title {
  font-size: 14px;
  font-weight: 600;
  color: #1F2937;
}
.csk-history-panel__back {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  border: 1px solid var(--csk-border);
  border-radius: 8px;
  background: #fff;
  color: #374151;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}
.csk-history-panel__back:hover { background: #F3F4F6; }
.csk-history-panel__list {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
}
.csk-history-panel__list::-webkit-scrollbar { width: 5px; }
.csk-history-panel__list::-webkit-scrollbar-thumb { background: #E5E7EB; border-radius: 2px; }
.csk-history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s;
  margin-bottom: 5px;
  border: 1px solid transparent;
}
.csk-history-item:hover { background: #F3F4F6; }
.csk-history-item--active {
  background: rgba(var(--csk-primary-rgb), 0.08);
  border-color: rgba(var(--csk-primary-rgb), 0.2);
}
.csk-history-item--active:hover { background: rgba(var(--csk-primary-rgb), 0.12); }
.csk-history-item__info { flex: 1; min-width: 0; }
.csk-history-item__id {
  font-size: 13px;
  font-weight: 500;
  color: #1F2937;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.csk-history-item__meta {
  font-size: 11px;
  color: #9CA3AF;
  margin-top: 3px;
}
.csk-history-item__actions {
  display: flex;
  gap: 4px;
  margin-left: 8px;
  opacity: 0;
  transition: opacity 0.15s;
}
.csk-history-item:hover .csk-history-item__actions { opacity: 1; }
.csk-history-action {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 7px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.15s;
}
.csk-history-action--export { background: #EFF6FF; color: #2563EB; }
.csk-history-action--export:hover { background: #DBEAFE; }
.csk-history-action--delete { background: #FEF2F2; color: #DC2626; }
.csk-history-action--delete:hover { background: #FEE2E2; }
.csk-history-panel__empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 20px;
  color: #9CA3AF;
  font-size: 13px;
  text-align: center;
}
.csk-history-panel__empty-icon {
  font-size: 34px;
  margin-bottom: 10px;
  opacity: 0.5;
}
.csk-history-panel__loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  color: #9CA3AF;
  font-size: 13px;
}

/* ========== 快捷问题芯片 ========== */
.csk-quick-replies {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 18px;
  max-width: 320px;
}
.csk-quick-reply {
  border: 1px solid var(--csk-border);
  background: #fff;
  color: #374151;
  font-size: 12.5px;
  padding: 7px 13px;
  border-radius: 999px;
  cursor: pointer;
  font-family: inherit;
  line-height: 1.3;
  transition: all 0.18s ease;
  max-width: 100%;
}
.csk-quick-reply:hover {
  border-color: var(--csk-primary);
  color: var(--csk-primary);
  background: rgba(var(--csk-primary-rgb), 0.06);
  transform: translateY(-1px);
}
.csk-quick-reply:active { transform: scale(0.96); }

/* ========== 推荐问题（suggest-message-list） ========== */
.csk-suggestions {
  margin-top: 10px;
  padding: 8px 0 0 0;
  border-top: 1px solid var(--csk-border);
}
.csk-suggestions__label {
  font-size: 12px;
  color: #9CA3AF;
  margin-bottom: 6px;
}
.csk-suggestions__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.csk-suggestion-item {
  border: 1px solid var(--csk-border);
  background: #fff;
  color: #374151;
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-family: inherit;
  line-height: 1.3;
  transition: all 0.18s ease;
  max-width: 100%;
  text-align: left;
}
.csk-suggestion-item:hover {
  border-color: var(--csk-primary);
  color: var(--csk-primary);
  background: rgba(var(--csk-primary-rgb), 0.06);
  transform: translateY(-1px);
}
.csk-suggestion-item:active { transform: scale(0.96); }

/* ========== AI 消息操作条 ========== */
.csk-msg__actions {
  display: flex;
  gap: 2px;
  margin-top: 5px;
  padding: 0 2px;
  opacity: 0;
  transition: opacity 0.15s ease;
}
.csk-msg--ai:hover .csk-msg__actions { opacity: 1; }
.csk-msg--streaming .csk-msg__actions { display: none; }
.csk-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: none;
  background: transparent;
  color: #9CA3AF;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.csk-action-btn:hover {
  background: #F3F4F6;
  color: #374151;
}
.csk-action-btn--done { color: #10B981; }
.csk-action-btn:active { transform: scale(0.9); }

/* ========== 流式打字光标 ========== */
.csk-caret {
  display: inline-block;
  width: 7px;
  height: 15px;
  margin-left: 2px;
  vertical-align: text-bottom;
  background: var(--csk-primary);
  border-radius: 1px;
  animation: csk-caret-blink 1s step-end infinite;
}
@keyframes csk-caret-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* ========== 代码块复制按钮 ========== */
.csk-md-code-copy {
  position: absolute;
  top: 8px;
  right: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: none;
  background: rgba(255, 255, 255, 0.12);
  color: #CBD5E1;
  border-radius: 6px;
  cursor: pointer;
  opacity: 0;
  transition: all 0.15s ease;
}
.csk-md-code-block:hover .csk-md-code-copy { opacity: 1; }
.csk-md-code-copy:hover { background: rgba(255, 255, 255, 0.22); color: #fff; }
.csk-md-code-copy:active { transform: scale(0.9); }

/* ========== 新消息提示按钮 ========== */
.csk-newmsg {
  position: absolute;
  bottom: 82px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 14px;
  border: none;
  background: var(--csk-primary);
  color: #fff;
  font-size: 12px;
  font-family: inherit;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(var(--csk-primary-rgb), 0.38);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  animation: csk-msg-in 0.25s ease;
  white-space: nowrap;
}
.csk-newmsg:hover { transform: translateX(-50%) translateY(-1px); box-shadow: 0 6px 18px rgba(var(--csk-primary-rgb), 0.48); }
.csk-newmsg:active { transform: translateX(-50%) scale(0.95); }
.csk-newmsg--hidden { display: none; }

/* ========== 发送按钮停止态 ========== */
.csk-send-btn--stop {
  background: #EF4444 !important;
  box-shadow: 0 3px 10px rgba(239, 68, 68, 0.35) !important;
}
.csk-send-btn--stop:hover:not(:disabled) {
  box-shadow: 0 5px 14px rgba(239, 68, 68, 0.45) !important;
}

/* ========== 窗口缩放拖拽手柄 ========== */
.csk-resize-handle {
  position: absolute;
  right: 4px;
  bottom: 4px;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  cursor: nwse-resize;
  z-index: 5;
  user-select: none;
  -webkit-user-select: none;
  /* 圆形半透明背景，与整体圆润风格一致 */
  border-radius: 50%;
  background: transparent;
  transition: background 0.2s ease;
}
.csk-resize-handle:hover {
  background: rgba(var(--csk-primary-rgb), 0.08);
}

/* 三斜线抓手 — 纯 CSS 绘制，用两条间距微调的线，视觉上是三条 */
.csk-resize-grip {
  display: block;
  width: 10px;
  height: 10px;
  background:
    linear-gradient(135deg,
      transparent 0%, transparent 38%,
      #C8CCD2 38%, #C8CCD2 42%,
      transparent 42%, transparent 54%,
      #C8CCD2 54%, #C8CCD2 58%,
      transparent 58%, transparent 70%,
      #C8CCD2 70%, #C8CCD2 74%,
      transparent 74%
    );
  transition: background 0.2s ease;
  border-radius: 2px;
}
/* hover 时线条变为主色 */
.csk-resize-handle:hover .csk-resize-grip {
  background:
    linear-gradient(135deg,
      transparent 0%, transparent 38%,
      var(--csk-primary) 38%, var(--csk-primary) 42%,
      transparent 42%, transparent 54%,
      var(--csk-primary) 54%, var(--csk-primary) 58%,
      transparent 58%, transparent 70%,
      var(--csk-primary) 70%, var(--csk-primary) 74%,
      transparent 74%
    );
}

/* 暗色模式 */
.csk-dark .csk-resize-grip {
  background:
    linear-gradient(135deg,
      transparent 0%, transparent 38%,
      #5B6070 38%, #5B6070 42%,
      transparent 42%, transparent 54%,
      #5B6070 54%, #5B6070 58%,
      transparent 58%, transparent 70%,
      #5B6070 70%, #5B6070 74%,
      transparent 74%
    );
}
.csk-dark .csk-resize-handle:hover .csk-resize-grip {
  background:
    linear-gradient(135deg,
      transparent 0%, transparent 38%,
      var(--csk-primary-light) 38%, var(--csk-primary-light) 42%,
      transparent 42%, transparent 54%,
      var(--csk-primary-light) 54%, var(--csk-primary-light) 58%,
      transparent 58%, transparent 70%,
      var(--csk-primary-light) 70%, var(--csk-primary-light) 74%,
      transparent 74%
    );
}

/* 缩放拖拽中：禁用过渡动画 + 全局光标 */
.csk-window--resizing {
  transition: none !important;
  user-select: none;
}
.csk-window--resizing * { cursor: nwse-resize !important; }

/* ========== 暗色模式 ========== */
.csk-root.csk-dark {
  --csk-bg-ai: #1E1E2E;
  --csk-text-ai: #E2E8F0;
  --csk-border: #3B3B52;
  --csk-bg-app: #141421;
  color: #E2E8F0;
}
.csk-dark .csk-window {
  background: #1A1A2E;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.2);
}
.csk-dark .csk-watermark {
  opacity: 1;
}
.csk-dark .csk-header::after { background: linear-gradient(to bottom, rgba(0,0,0,0.12), transparent); }
.csk-dark .csk-msg__avatar--ai {
  background: var(--csk-bg-ai);
  color: var(--csk-primary);
  border-color: var(--csk-border);
}
.csk-dark .csk-input-area { background: #1A1A2E; border-top-color: var(--csk-border); }
.csk-dark .csk-input-wrap { background: var(--csk-bg-app); border-color: var(--csk-border); }
.csk-dark .csk-input-wrap--focus { background: #1A1A2E; border-color: var(--csk-primary); }
.csk-dark .csk-input { color: #E2E8F0; }
.csk-dark .csk-loading__avatar { background: var(--csk-bg-ai); border-color: var(--csk-border); }
.csk-dark .csk-loading__bubble { background: var(--csk-bg-ai); border-color: var(--csk-border); }
.csk-dark .csk-loading__dot { background: #6B7280; }
.csk-dark .csk-category-bar { background: #1A1A2E; border-top-color: var(--csk-border); }
.csk-dark .csk-category-select { background-color: var(--csk-bg-app); border-color: var(--csk-border); color: #E2E8F0; }
.csk-dark .csk-sources { background: #1E1E2E; border-color: var(--csk-border); }
.csk-dark .csk-sources__header { background: #25253A; }
.csk-dark .csk-sources__header:hover { background: #2D2D48; }
.csk-dark .csk-source-item:hover { background: var(--csk-bg-ai); }
.csk-dark .csk-source-item__name { color: #E2E8F0; }
.csk-dark .csk-source-item__meta { color: #6B7280; }
.csk-dark .csk-history-panel { background: #1A1A2E; }
.csk-dark .csk-history-panel__header { background: var(--csk-bg-app); border-bottom-color: var(--csk-border); }
.csk-dark .csk-history-panel__back { background: var(--csk-bg-app); border-color: var(--csk-border); color: #E2E8F0; }
.csk-dark .csk-history-panel__back:hover { background: #2D2D48; }
.csk-dark .csk-history-item:hover { background: #25253A; }
.csk-dark .csk-history-item__id { color: #E2E8F0; }
.csk-dark .csk-history-item__meta { color: #6B7280; }
.csk-dark .csk-history-item--active { background: rgba(var(--csk-primary-rgb), 0.15); }
.csk-dark .csk-history-item--active:hover { background: rgba(var(--csk-primary-rgb), 0.22); }
.csk-dark .csk-action-btn:hover { background: #2D2D48; color: #E2E8F0; }
.csk-dark .csk-clear-btn { background: var(--csk-bg-app); border-color: var(--csk-border); color: #9CA3AF; }
.csk-dark .csk-clear-btn:hover { background: #3B1A1A; border-color: #7F1D1D; color: #FCA5A5; }
.csk-dark .csk-md-code-block { background: #0F0F1A; }
.csk-dark .csk-md-blockquote { background: rgba(var(--csk-primary-rgb), 0.08); }
.csk-dark .csk-md-link { color: var(--csk-primary-light); }
.csk-dark .csk-md-table th { background: rgba(var(--csk-primary-rgb), 0.14); color: #E2E8F0; }
.csk-dark .csk-md-table tbody tr:nth-child(even) { background: rgba(148, 163, 184, 0.05); }
.csk-dark .csk-msg--ai .csk-msg__bubble { background: var(--csk-bg-ai); color: var(--csk-text-ai); border-color: var(--csk-border); }
.csk-dark .csk-welcome__title { color: #E2E8F0; }
.csk-dark .csk-welcome__desc { color: #6B7280; }
.csk-dark .csk-quick-reply { background: var(--csk-bg-app); border-color: var(--csk-border); color: #CBD5E1; }
.csk-dark .csk-quick-reply:hover { background: rgba(var(--csk-primary-rgb), 0.12); border-color: var(--csk-primary); color: var(--csk-primary-light); }
.csk-dark .csk-suggestion-item { background: var(--csk-bg-app); border-color: var(--csk-border); color: #CBD5E1; }
.csk-dark .csk-suggestion-item:hover { background: rgba(var(--csk-primary-rgb), 0.12); border-color: var(--csk-primary); color: var(--csk-primary-light); }
.csk-dark .csk-teaser { background: #2D2D48; color: #E2E8F0; box-shadow: 0 4px 20px rgba(0,0,0,0.35); }
.csk-dark .csk-teaser::after { border-top-color: #2D2D48; }
.csk-dark .csk-teaser__close { color: #6B7280; }
.csk-dark .csk-teaser__close:hover { color: #9CA3AF; }
.csk-dark .csk-feedback-btn { background: rgba(var(--csk-primary-rgb), 0.1); color: #9CA3AF; }
.csk-dark .csk-feedback-btn:hover { background: rgba(var(--csk-primary-rgb), 0.2); color: var(--csk-primary-light); }
.csk-dark .csk-feedback-btn--active { background: rgba(var(--csk-primary-rgb), 0.28); color: var(--csk-primary-light); }
.csk-dark .csk-history-panel__search-wrap { background: var(--csk-bg-app); border-color: var(--csk-border); }
.csk-dark .csk-history-panel__search-wrap:focus-within { border-color: var(--csk-primary); }
.csk-dark .csk-history-panel__search { color: #E2E8F0; }
.csk-dark .csk-launcher__badge { box-shadow: 0 0 0 2px #1A1A2E; }
.csk-dark .csk-welcome__avatar { box-shadow: 0 6px 18px rgba(var(--csk-primary-rgb), 0.25); }
.csk-dark .csk-header__avatar { box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.15); background: rgba(255, 255, 255, 0.1); }
.csk-dark .csk-role-select option {
  background: #1A1A2E;
  color: #E2E8F0;
}

/* Launcher 拖拽态：微放大 + 阴影加深 */
.csk-launcher--dragging {
  cursor: grabbing !important;
  transform: scale(1.1) !important;
  box-shadow:
    0 4px 12px rgba(0, 0, 0, 0.14),
    0 12px 32px rgba(0, 0, 0, 0.18),
    0 14px 40px rgba(236, 72, 153, 0.36),
    0 0 56px rgba(236, 72, 153, 0.18) !important;
}
/* 拖拽中隐藏未读徽章 */
.csk-launcher--dragging .csk-launcher__badge { display: none !important; }
/* 吸附过渡动画（释放时的缓动） */
.csk-launcher--snap {
  transition: left 0.3s ease-out, right 0.3s ease-out, bottom 0.3s ease-out !important;
}

/* ========== Launcher 未读徽章 ========== */
.csk-launcher__badge {
  position: absolute;
  top: -2px;
  right: -2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #EF4444;
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px #fff;
  animation: csk-badge-in 0.28s cubic-bezier(0.34, 1.56, 0.64, 1);
  pointer-events: none;
}
.csk-launcher__badge--hidden { display: none; }
@keyframes csk-badge-in {
  from { transform: scale(0); }
  to { transform: scale(1); }
}

/* ========== Launcher 提示气泡 ========== */
.csk-teaser {
  position: fixed;
  bottom: 90px;
  z-index: 9997;
  max-width: 240px;
  padding: 10px 14px;
  background: #fff;
  color: #1F2937;
  font-size: 13px;
  line-height: 1.5;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.15);
  animation: csk-teaser-in 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  cursor: pointer;
  user-select: none;
}
.csk-teaser--right { right: 24px; }
.csk-teaser--left { left: 24px; }
.csk-teaser::after {
  content: '';
  position: absolute;
  bottom: -6px;
  right: 28px;
  width: 12px;
  height: 12px;
  background: inherit;
  border-radius: 2px;
  transform: rotate(45deg);
  box-shadow: 2px 2px 4px rgba(15, 23, 42, 0.08);
}
.csk-teaser--left::after { right: auto; left: 28px; }
.csk-teaser__close {
  position: absolute;
  top: 4px;
  right: 6px;
  background: none;
  border: none;
  font-size: 16px;
  color: #9CA3AF;
  cursor: pointer;
  padding: 2px 4px;
  line-height: 1;
  border-radius: 4px;
}
.csk-teaser__close:hover { color: #374151; }
.csk-teaser--hidden { display: none; }
@keyframes csk-teaser-in {
  from { opacity: 0; transform: translateY(8px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ========== 消息反馈按钮（👍 / 👎） ========== */
.csk-feedback-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: none;
  background: rgba(var(--csk-primary-rgb), 0.08);
  color: #9CA3AF;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
  padding: 0;
}
.csk-feedback-btn:hover { background: rgba(var(--csk-primary-rgb), 0.18); color: var(--csk-primary); }
.csk-feedback-btn--active {
  background: rgba(var(--csk-primary-rgb), 0.28);
  color: var(--csk-primary);
}
.csk-feedback-btn--active.down { background: #FEF2F2; color: #EF4444; }
.csk-feedback-btn:active { transform: scale(0.9); }
.csk-msg--streaming .csk-feedback-btn { display: none; }

/* ========== 历史会话搜索框 ========== */
.csk-history-panel__search-wrap {
  padding: 8px 10px;
  border-bottom: 1px solid var(--csk-border);
  flex-shrink: 0;
}
.csk-history-panel__search-wrap:focus-within {
  border-bottom-color: var(--csk-primary);
}
.csk-history-panel__search {
  width: 100%;
  padding: 7px 10px;
  border: 1px solid var(--csk-border);
  border-radius: 8px;
  font-size: 12.5px;
  font-family: inherit;
  color: #1F2937;
  background: var(--csk-bg-app);
  outline: none;
  transition: border-color 0.2s;
}
.csk-history-panel__search:focus { border-color: var(--csk-primary); }
.csk-history-panel__search::placeholder { color: #9CA3AF; }

/* ========== a11y 焦点指示 ========== */
.csk-root :focus-visible {
  outline: 2px solid var(--csk-primary);
  outline-offset: 2px;
}
.csk-root button:focus-visible {
  outline: 2px solid var(--csk-primary);
  outline-offset: 2px;
  border-radius: inherit;
}
/* 弹窗打开时隐藏 launcher 上的焦点环 */
.csk-launcher:focus-visible {
  outline: none;
  border-color: rgba(255, 255, 255, 0.75);
  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.06),
    0 4px 16px rgba(0, 0, 0, 0.10),
    0 6px 24px rgba(var(--csk-primary-rgb), 0.28),
    0 0 48px rgba(var(--csk-primary-rgb), 0.12),
    0 0 0 4px rgba(var(--csk-primary-rgb), 0.3);
}

/* ========== a11y aria-live 播报区（视觉隐藏） ========== */
.csk-sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0,0,0,0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* ========== 会话分组标题 ========== */
.csk-history-group {
  margin-bottom: 4px;
}
.csk-history-group__label {
  font-size: 11px;
  font-weight: 600;
  color: #9CA3AF;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 8px 12px 4px;
  user-select: none;
}
.csk-dark .csk-history-group__label { color: #6B7280; }

/* ========== 移动端适配 ========== */
@media (max-width: 480px) {
  .csk-window {
    width: 100vw !important;
    height: 100vh !important;
    max-height: 100vh;
    bottom: 0 !important;
    right: 0 !important;
    left: 0 !important;
    border-radius: 0;
  }
  .csk-resize-handle { display: none !important; }
  .csk-window--hidden { transform: translateY(100%); }
  /* 移动端默认位置，仅在未被 JS 拖拽覆盖时生效 */
  .csk-launcher:not([style*="bottom"]) { bottom: 20px; }
  .csk-launcher--right:not([style*="bottom"]) { right: 20px; }
  .csk-launcher--left:not([style*="bottom"]) { left: 20px; }
}
`;
}

/**
 * 注入样式到 document.head
 */
export function injectStyles(config: ResolvedConfig): void {
  // 避免重复注入
  if (document.querySelector('style[data-csk-sdk]')) {
    return;
  }

  styleElement = document.createElement('style');
  styleElement.setAttribute('data-csk-sdk', '');
  styleElement.textContent = getStyles(config);
  document.head.appendChild(styleElement);
}

/**
 * 移除注入的样式
 */
export function removeStyles(): void {
  if (styleElement && styleElement.parentNode) {
    styleElement.parentNode.removeChild(styleElement);
    styleElement = null;
  }
  document.querySelectorAll('style[data-csk-sdk]').forEach((el) => el.remove());
}