/**
 * 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)}`;
}

/** 两个 #RRGGBB 颜色之间的 RGB 线性插值；ratio∈[0,1]，0=from，1=to */
function mixColor(from: string, to: string, ratio: number): string {
  const parse = (hex: string): [number, number, number] | null => {
    const m = hex.match(/^#([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/);
    if (!m) return null;
    return [parseInt(m[1], 16), parseInt(m[2], 16), parseInt(m[3], 16)];
  };
  const a = parse(from);
  const b = parse(to);
  if (!a || !b) return from;
  const mix = (x: number, y: number) => Math.round(x + (y - x) * ratio);
  const r = mix(a[0], b[0]);
  const g = mix(a[1], b[1]);
  const bl = mix(a[2], b[2]);
  return `#${r.toString(16).padStart(2, '0')}${g.toString(16).padStart(2, '0')}${bl.toString(16).padStart(2, '0')}`;
}

/** TDesign 默认蓝阶梯（primaryColor 非 #RRGGBB 时的回退值，对应 --td-brand-color-1..10） */
const DEFAULT_BRAND_LADDER = ['#f2f3ff', '#d9e1ff', '#b5c7ff', '#8eabff', '#618dff', '#366ef4', '#0052d9', '#003cab', '#002a7c', '#001a57'];

/** 由 primaryColor 生成 10 级品牌色阶梯，index 6（即 --td-brand-color-7）为 primaryColor 本身 */
function brandLadder(hex: string): string[] {
  if (!/^#[0-9a-fA-F]{6}$/.test(hex)) return DEFAULT_BRAND_LADDER;
  // 浅侧（-1..-6）向白插值，深侧（-8..-10）向黑插值
  const lightRatios = [0.96, 0.78, 0.60, 0.42, 0.28, 0.15];
  const darkRatios = [0.18, 0.40, 0.62];
  const ladder: string[] = [];
  for (const r of lightRatios) ladder.push(mixColor(hex, '#ffffff', r));
  ladder.push(hex);
  for (const r of darkRatios) ladder.push(mixColor(hex, '#000000', r));
  return ladder;
}

/** 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: #F3F3F3;
    --csk-text-user: #ffffff;
    --csk-text-ai: rgba(0, 0, 0, 0.9);
    --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 10px rgba(0, 0, 0, 0.05), 0 4px 5px rgba(0, 0, 0, 0.08);
    --csk-border: #E8E8E8;
    --csk-border-strong: #DDDDDD;
    --csk-text-secondary: rgba(0, 0, 0, 0.6);
    --csk-text-muted: rgba(0, 0, 0, 0.4);
    --csk-bg-app: #FFFFFF;
  `;
}

/** 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')}`;
}

/**
 * TDesign light 主题变量：在 .csk-root 上自包含声明，使 SDK 的 shadow DOM 组件
 * （t-chat-item / t-button / t-tag / t-select / t-chat-action / t-chat-sender）不依赖
 * 宿主页面的 :root --td-* 变量。
 *
 * 原理：CSS 自定义属性直接声明在元素上永远压过继承值（与选择器特异性/顺序无关），
 * 故把整套 light 主题变量直接写在 .csk-root 上即可免疫宿主对 :root 的覆盖。
 *
 * 内容对应 tdesign-web-components v1.2.10 的 style/index.js 中 css$2 的 light 块
 * （:root, :root[theme-mode="light"] 块 + :root 的 radius/font/size/comp 块）。
 * 品牌色阶梯由 primaryColor 动态派生；升级 tdesign-web-components 版本时需同步核对。
 */
function tdThemeVars(config: ResolvedConfig): string {
  const darker = adjustColor(config.primaryColor, -15);
  const lighter = adjustColor(config.primaryColor, 18);
  const [b1, b2, b3, b4, b5, b6, b7, b8, b9, b10] = brandLadder(config.primaryColor);

  return `
    /* ===== 品牌色阶梯（跟随 primaryColor） ===== */
    --td-brand-color-1: ${b1};
    --td-brand-color-2: ${b2};
    --td-brand-color-3: ${b3};
    --td-brand-color-4: ${b4};
    --td-brand-color-5: ${b5};
    --td-brand-color-6: ${b6};
    --td-brand-color-7: ${b7};
    --td-brand-color-8: ${b8};
    --td-brand-color-9: ${b9};
    --td-brand-color-10: ${b10};

    /* ===== 警告 / 错误 / 成功阶梯（不跟随主题色） ===== */
    --td-warning-color-1: #fff1e9;
    --td-warning-color-2: #ffd9c2;
    --td-warning-color-3: #ffb98c;
    --td-warning-color-4: #fa9550;
    --td-warning-color-5: #e37318;
    --td-warning-color-6: #be5a00;
    --td-warning-color-7: #954500;
    --td-warning-color-8: #713300;
    --td-warning-color-9: #532300;
    --td-warning-color-10: #3b1700;
    --td-error-color-1: #fff0ed;
    --td-error-color-2: #ffd8d2;
    --td-error-color-3: #ffb9b0;
    --td-error-color-4: #ff9285;
    --td-error-color-5: #f6685d;
    --td-error-color-6: #d54941;
    --td-error-color-7: #ad352f;
    --td-error-color-8: #881f1c;
    --td-error-color-9: #68070a;
    --td-error-color-10: #490002;
    --td-success-color-1: #e3f9e9;
    --td-success-color-2: #c6f3d7;
    --td-success-color-3: #92dab2;
    --td-success-color-4: #56c08d;
    --td-success-color-5: #2ba471;
    --td-success-color-6: #008858;
    --td-success-color-7: #006c45;
    --td-success-color-8: #005334;
    --td-success-color-9: #003b23;
    --td-success-color-10: #002515;

    /* ===== 灰阶 ===== */
    --td-gray-color-1: #f3f3f3;
    --td-gray-color-2: #eee;
    --td-gray-color-3: #e8e8e8;
    --td-gray-color-4: #ddd;
    --td-gray-color-5: #c6c6c6;
    --td-gray-color-6: #a6a6a6;
    --td-gray-color-7: #8b8b8b;
    --td-gray-color-8: #777;
    --td-gray-color-9: #5e5e5e;
    --td-gray-color-10: #4b4b4b;
    --td-gray-color-11: #393939;
    --td-gray-color-12: #2c2c2c;
    --td-gray-color-13: #242424;
    --td-gray-color-14: #181818;

    /* ===== 白 / 灰字体色 ===== */
    --td-font-white-1: #ffffff;
    --td-font-white-2: rgba(255, 255, 255, 0.55);
    --td-font-white-3: rgba(255, 255, 255, 0.35);
    --td-font-white-4: rgba(255, 255, 255, 0.22);
    --td-font-gray-1: rgba(0, 0, 0, 0.9);
    --td-font-gray-2: rgba(0, 0, 0, 0.6);
    --td-font-gray-3: rgba(0, 0, 0, 0.4);
    --td-font-gray-4: rgba(0, 0, 0, 0.26);

    /* ===== 品牌语义色（沿用 SDK 现有映射，hover/active 加深、light 变浅） ===== */
    --td-brand-color: ${config.primaryColor};
    --td-brand-color-hover: ${darker};
    --td-brand-color-active: ${darker};
    --td-brand-color-focus: ${config.primaryColor};
    --td-brand-color-disabled: ${lighter};
    --td-brand-color-light: ${lighter};
    --td-brand-color-light-hover: ${lighter};
    /* ===== 警告 / 错误 / 成功 语义色 ===== */
    --td-warning-color: var(--td-warning-color-5);
    --td-error-color: var(--td-error-color-6);
    --td-success-color: var(--td-success-color-5);
    --td-warning-color-hover: var(--td-warning-color-4);
    --td-warning-color-focus: var(--td-warning-color-2);
    --td-warning-color-active: var(--td-warning-color-6);
    --td-warning-color-disabled: var(--td-warning-color-3);
    --td-warning-color-light: var(--td-warning-color-1);
    --td-warning-color-light-hover: var(--td-warning-color-2);
    --td-error-color-hover: var(--td-error-color-5);
    --td-error-color-focus: var(--td-error-color-2);
    --td-error-color-active: var(--td-error-color-7);
    --td-error-color-disabled: var(--td-error-color-3);
    --td-error-color-light: var(--td-error-color-1);
    --td-error-color-light-hover: var(--td-error-color-2);
    --td-success-color-hover: var(--td-success-color-4);
    --td-success-color-focus: var(--td-success-color-2);
    --td-success-color-active: var(--td-success-color-6);
    --td-success-color-disabled: var(--td-success-color-3);
    --td-success-color-light: var(--td-success-color-1);
    --td-success-color-light-hover: var(--td-success-color-2);

    /* ===== 遮罩 / 背景 / 文字 / 边框 / 阴影 / 滚动条 ===== */
    --td-mask-active: rgba(0, 0, 0, 0.6);
    --td-mask-disabled: rgba(255, 255, 255, 0.6);
    --td-bg-color-page: var(--td-gray-color-2);
    --td-bg-color-container: #fff;
    --td-bg-color-container-hover: var(--td-gray-color-1);
    --td-bg-color-container-active: var(--td-gray-color-3);
    --td-bg-color-container-select: #fff;
    --td-bg-color-secondarycontainer: var(--td-gray-color-1);
    --td-bg-color-secondarycontainer-hover: var(--td-gray-color-2);
    --td-bg-color-secondarycontainer-active: var(--td-gray-color-4);
    --td-bg-color-component: var(--td-gray-color-3);
    --td-bg-color-component-hover: var(--td-gray-color-4);
    --td-bg-color-component-active: var(--td-gray-color-6);
    --td-bg-color-secondarycomponent: var(--td-gray-color-4);
    --td-bg-color-secondarycomponent-hover: var(--td-gray-color-5);
    --td-bg-color-secondarycomponent-active: var(--td-gray-color-6);
    --td-bg-color-component-disabled: var(--td-gray-color-2);
    --td-bg-color-specialcomponent: #fff;
    --td-text-color-primary: var(--td-font-gray-1);
    --td-text-color-secondary: var(--td-font-gray-2);
    --td-text-color-placeholder: var(--td-font-gray-3);
    --td-text-color-disabled: var(--td-font-gray-4);
    --td-text-color-anti: #fff;
    --td-text-color-brand: var(--td-brand-color-7);
    --td-text-color-link: var(--td-brand-color-8);
    --td-border-level-1-color: var(--td-gray-color-3);
    --td-component-stroke: var(--td-gray-color-3);
    --td-border-level-2-color: var(--td-gray-color-4);
    --td-component-border: var(--td-gray-color-4);
    --td-shadow-1: 0 1px 10px rgba(0, 0, 0, 0.05), 0 4px 5px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.12);
    --td-shadow-2: 0 3px 14px 2px rgba(0, 0, 0, 0.05), 0 8px 10px 1px rgba(0, 0, 0, 0.06), 0 5px 5px -3px rgba(0, 0, 0, 0.1);
    --td-shadow-3: 0 6px 30px 5px rgba(0, 0, 0, 0.05), 0 16px 24px 2px rgba(0, 0, 0, 0.04), 0 8px 10px -5px rgba(0, 0, 0, 0.08);
    --td-shadow-inset-top: inset 0 0.5px 0 #dcdcdc;
    --td-shadow-inset-right: inset 0.5px 0 0 #dcdcdc;
    --td-shadow-inset-bottom: inset 0 -0.5px 0 #dcdcdc;
    --td-shadow-inset-left: inset -0.5px 0 0 #dcdcdc;
    --td-table-shadow-color: rgba(0, 0, 0, 0.08);
    --td-scrollbar-color: rgba(0, 0, 0, 0.1);
    --td-scrollbar-hover-color: rgba(0, 0, 0, 0.3);
    --td-scroll-track-color: #fff;

    /* ===== 圆角 ===== */
    --td-radius-small: 2px;
    --td-radius-default: 3px;
    --td-radius-medium: 6px;
    --td-radius-large: 9px;
    --td-radius-extraLarge: 12px;
    --td-radius-round: 999px;
    --td-radius-circle: 50%;

    /* ===== 字体 ===== */
    --td-font-family: PingFang SC, Microsoft YaHei, Arial Regular;
    --td-font-family-medium: PingFang SC, Microsoft YaHei, Arial Medium;
    --td-font-size-link-small: 12px;
    --td-font-size-link-medium: 14px;
    --td-font-size-link-large: 16px;
    --td-font-size-mark-small: 12px;
    --td-font-size-mark-medium: 14px;
    --td-font-size-body-small: 12px;
    --td-font-size-body-medium: 14px;
    --td-font-size-body-large: 16px;
    --td-font-size-title-small: 14px;
    --td-font-size-title-medium: 16px;
    --td-font-size-title-large: 20px;
    --td-font-size-headline-small: 24px;
    --td-font-size-headline-medium: 28px;
    --td-font-size-headline-large: 36px;
    --td-font-size-display-medium: 48px;
    --td-font-size-display-large: 64px;
    --td-line-height-link-small: 20px;
    --td-line-height-link-medium: 22px;
    --td-line-height-link-large: 24px;
    --td-line-height-mark-small: 20px;
    --td-line-height-mark-medium: 22px;
    --td-line-height-body-small: 20px;
    --td-line-height-body-medium: 22px;
    --td-line-height-body-large: 24px;
    --td-line-height-title-small: 22px;
    --td-line-height-title-medium: 24px;
    --td-line-height-title-large: 28px;
    --td-line-height-headline-small: 32px;
    --td-line-height-headline-medium: 36px;
    --td-line-height-headline-large: 44px;
    --td-line-height-display-medium: 56px;
    --td-line-height-display-large: 72px;
    --td-font-link-small: var(--td-font-size-link-small) / var(--td-line-height-link-small) var(--td-font-family);
    --td-font-link-medium: var(--td-font-size-link-medium) / var(--td-line-height-link-medium) var(--td-font-family);
    --td-font-link-large: var(--td-font-size-link-large) / var(--td-line-height-link-large) var(--td-font-family);
    --td-font-mark-small: 600 var(--td-font-size-mark-small) / var(--td-line-height-mark-small) var(--td-font-family);
    --td-font-mark-medium: 600 var(--td-font-size-mark-medium) / var(--td-line-height-mark-medium) var(--td-font-family);
    --td-font-body-small: var(--td-font-size-body-small) / var(--td-line-height-body-small) var(--td-font-family);
    --td-font-body-medium: var(--td-font-size-body-medium) / var(--td-line-height-body-medium) var(--td-font-family);
    --td-font-body-large: var(--td-font-size-body-large) / var(--td-line-height-body-large) var(--td-font-family);
    --td-font-title-small: 600 var(--td-font-size-title-small) / var(--td-line-height-title-small) var(--td-font-family);
    --td-font-title-medium: 600 var(--td-font-size-title-medium) / var(--td-line-height-title-medium) var(--td-font-family);
    --td-font-title-large: 600 var(--td-font-size-title-large) / var(--td-line-height-title-large) var(--td-font-family);
    --td-font-headline-small: 600 var(--td-font-size-headline-small) / var(--td-line-height-headline-small) var(--td-font-family);
    --td-font-headline-medium: 600 var(--td-font-size-headline-medium) / var(--td-line-height-headline-medium) var(--td-font-family);
    --td-font-headline-large: 600 var(--td-font-size-headline-large) / var(--td-line-height-headline-large) var(--td-font-family);
    --td-font-display-medium: 600 var(--td-font-size-display-medium) / var(--td-line-height-display-medium) var(--td-font-family);
    --td-font-display-large: 600 var(--td-font-size-display-large) / var(--td-line-height-display-large) var(--td-font-family);

    /* ===== 尺寸与间距 ===== */
    --td-size-1: 2px;
    --td-size-2: 4px;
    --td-size-3: 6px;
    --td-size-4: 8px;
    --td-size-5: 12px;
    --td-size-6: 16px;
    --td-size-7: 20px;
    --td-size-8: 24px;
    --td-size-9: 28px;
    --td-size-10: 32px;
    --td-size-11: 36px;
    --td-size-12: 40px;
    --td-size-13: 48px;
    --td-size-14: 56px;
    --td-size-15: 64px;
    --td-size-16: 72px;
    --td-comp-size-xxxs: var(--td-size-6);
    --td-comp-size-xxs: var(--td-size-7);
    --td-comp-size-xs: var(--td-size-8);
    --td-comp-size-s: var(--td-size-9);
    --td-comp-size-m: var(--td-size-10);
    --td-comp-size-l: var(--td-size-11);
    --td-comp-size-xl: var(--td-size-12);
    --td-comp-size-xxl: var(--td-size-13);
    --td-comp-size-xxxl: var(--td-size-14);
    --td-comp-size-xxxxl: var(--td-size-15);
    --td-comp-size-xxxxxl: var(--td-size-16);
    --td-pop-padding-s: var(--td-size-2);
    --td-pop-padding-m: var(--td-size-3);
    --td-pop-padding-l: var(--td-size-4);
    --td-pop-padding-xl: var(--td-size-5);
    --td-pop-padding-xxl: var(--td-size-6);
    --td-comp-paddingLR-xxs: var(--td-size-1);
    --td-comp-paddingLR-xs: var(--td-size-2);
    --td-comp-paddingLR-s: var(--td-size-4);
    --td-comp-paddingLR-m: var(--td-size-5);
    --td-comp-paddingLR-l: var(--td-size-6);
    --td-comp-paddingLR-xl: var(--td-size-8);
    --td-comp-paddingLR-xxl: var(--td-size-10);
    --td-comp-paddingTB-xxs: var(--td-size-1);
    --td-comp-paddingTB-xs: var(--td-size-2);
    --td-comp-paddingTB-s: var(--td-size-4);
    --td-comp-paddingTB-m: var(--td-size-5);
    --td-comp-paddingTB-l: var(--td-size-6);
    --td-comp-paddingTB-xl: var(--td-size-8);
    --td-comp-paddingTB-xxl: var(--td-size-10);
    --td-comp-margin-xxs: var(--td-size-1);
    --td-comp-margin-xs: var(--td-size-2);
    --td-comp-margin-s: var(--td-size-4);
    --td-comp-margin-m: var(--td-size-5);
    --td-comp-margin-l: var(--td-size-6);
    --td-comp-margin-xl: var(--td-size-7);
    --td-comp-margin-xxl: var(--td-size-8);
    --td-comp-margin-xxxl: var(--td-size-10);
    --td-comp-margin-xxxxl: var(--td-size-12);

  `;
}

/**
 * TDesign Chat 相关变量（--td-chat-* / --td-chat-md-* / --td-chat-input-*）：
 * 在 .csk-root 上自包含声明。
 *
 * 原因：这些变量在 tdesign-web-components 中定义于 globalCSS 的 constructable
 * stylesheet，选择器为 :root。但 adoptedStyleSheets 里的 :root 不匹配 shadow root，
 * 导致 shadow DOM 内（t-chat-item / t-chat-md-content）无法解析到这些变量，
 * markdown 排版（标题/列表/引用/代码块等）会回退为初始值而"裸奔"。
 * 直接声明在 .csk-root 上即可经 CSS 自定义属性继承穿透 shadow DOM。
 *
 * 内容对应 tdesign-web-components v1.2.10 style/index.js 中 css（chat-item + markdown）
 * 与 css$1（input）两个 :root 变量块；升级版本时需同步核对。
 */
function tdChatVars(): string {
  return `
    /* ===== chat-input ===== */
    --td-chat-input-attachments-margin: 0 0 var(--td-comp-margin-xs) 0;
    --td-chat-input-textarea-max-height: 134px;
    --td-chat-input-textarea-scrollbar-width: 4px;
    --td-chat-input-textarea-scrollbar-thumb-radius: 2px;
    --td-chat-input-padding: var(--td-comp-paddingTB-m) var(--td-comp-paddingLR-m);
    --td-chat-input-radius: 16px;
    --td-chat-input-shadow: 0px 0px 0px 2px var(--td-brand-color-focus);
    --td-chat-input-background: var(--td-bg-color-specialcomponent);
    --td-chat-input-hover-border: var(--td-brand-color);
    --td-chat-input-actions-margin: 0;
    --td-chat-input-actions-gap: var(--td-comp-margin-m);
    --td-chat-input-actions-item-wh: 28px;
    --td-chat-input-actions-item-radius: 14px;
    --td-chat-input-actions-item-font-size: 20px;
    --td-chat-input-box-shadow: none;
    --td-chat-input-font-size: 16px;
    --td-chat-input-content-default-border: var(--td-component-border);
    --td-chat-input-textarea-scrollbar-color: var(--td-scrollbar-color);
    --td-chat-input-textarea-scrollbar-hover-color: var(--td-scrollbar-hover-color);
    --td-chat-input-button-default-bg: var(--td-bg-color-secondarycomponent);
    --td-chat-input-button-default-color: var(--td-bg-color-container);
    --td-chat-input-actions-item-color: var(--td-text-color-secondary);
    --td-chat-input-actions-item-bg: transparent;
    --td-chat-input-actions-item-hover-bg: var(--td-bg-color-container-hover);

    /* ===== chat-list / chat-item ===== */
    --td-chat-list-padding-bottom: 0;
    --td-chat-list-scroll-button-top: calc(100% - 64px);
    --td-chat-list-scroll-button-left: 50%;
    --td-chat-list-scroll-button-w: 40px;
    --td-chat-list-scroll-button-h: 40px;
    --td-chat-list-scroll-button-border: 0.5px solid #dcdcdc;
    --td-chat-list-scroll-button-radius: 20px;
    --td-chat-list-scroll-button-index: 50;
    --td-chat-list-scroll-button-transform: translate(-50%, 0);
    --td-chat-item-gap: 38px;
    --td-chat-item-header-padding: 0;
    --td-chat-item-text-header-padding: 0;
    --td-chat-item-header-padding-right: 0;
    --td-chat-item-name-padding: 0 var(--td-comp-paddingLR-s) 0 0;
    --td-chat-item-name-padding-right: 0 0 0 var(--td-comp-paddingLR-l);
    --td-chat-item-name-font: var(--td-font-body-medium);
    --td-chat-item-content-gap: var(--td-comp-margin-s);
    --td-chat-item-content-max-width: 800px;
    --td-chat-item-content-base-margin: 0 0 var(--td-comp-margin-xs) 0;
    --td-chat-item-content-base-padding: var(--td-comp-paddingTB-m) var(--td-comp-paddingLR-l);
    --td-chat-item-content-base-border-color: transparent;
    --td-chat-item-content-padding: var(--td-comp-paddingTB-m) 0;
    --td-chat-item-text-error-color: var(--td-error-color);
    --td-chat-item-user-text-color: var(--td-text-color-secondary);
    --td-chat-item-text-max-width: 100%;
    --td-chat-item-text-padding: var(--td-comp-paddingTB-m) var(--td-comp-paddingLR-l);
    --td-chat-item-status-margin: var(--td-comp-margin-s) 0 0;
    --td-chat-item-text-content-padding: 0;
    --td-chat-item-text-detail-padding: 0;
    --td-chat-item-text-detail-margin: 0;
    --td-chat-item-text-detail-text-margin: 0;
    --td-chat-item-text-radius: var(--td-radius-extraLarge);
    --td-chat-item-text-border: 1px solid transparent;
    --td-chat-item-content-border: 1px solid transparent;
    --td-chat-item-content-radius: var(--td-radius-extraLarge);
    --td-chat-item-system-margin: 0;
    --td-chat-item-system-padding: var(--td-comp-paddingTB-xs) var(--td-comp-paddingLR-s);
    --td-chat-item-system-radius: var(--td-radius-medium);
    --td-chat-item-system-bg-color: var(--td-bg-color-secondarycontainer);
    --td-chat-item-system-color: #afafaf;
    --td-chat-item-left-avatar-margin: 0 var(--td-comp-margin-xl) 0 var(--td-comp-margin-xs);
    --td-chat-item-right-avatar-margin: 0 var(--td-comp-margin-xs) 0 var(--td-comp-margin-xl);
    --td-chat-item-avatar-padding: 6px 0 0 0;
    --td-chat-item-avatar-has-header-padding: 30px 0 0 0;
    --td-chat-item-image-margin: var(--td-comp-margin-m) 0;
    --td-chat-item-think-gap-p: 0 0 var(--td-comp-margin-s) 0;
    --td-chat-item-think-padding-tb: var(--td-comp-paddingTB-s);
    --td-chat-item-think-padding-lr: var(--td-comp-paddingLR-m);
    --td-chat-item-think-border: none;
    --td-chat-item-think-radius: var(--td-radius-medium);
    --td-chat-item-think-title-gap: var(--td-comp-margin-s);
    --td-chat-item-think-status-wh: 20px;
    --td-chat-item-think-pending-border-width: 2px;
    --td-chat-item-think-header-border: none;
    --td-chat-item-think-body-bg: none;
    --td-chat-item-think-body-border: none;
    --td-chat-item-think-content-margin-top: 2px;
    --td-chat-item-think-shadow-top: 0;
    --td-chat-item-think-shadow-bottom: 0;
    --td-chat-item-think-shadow-margin-top: 0;
    --td-chat-item-think-shadow-margin-bottom: 0;
    --td-chat-item-think-shadow-top-height: 24px;
    --td-chat-item-think-shadow-bottom-height: 24px;
    --td-chat-item-think-inner-padding: 0 var(--td-comp-paddingLR-m) var(--td-comp-paddingTB-s) var(--td-comp-paddingLR-m);
    --td-chat-item-think-inner-border: solid 2px var(--td-component-stroke);
    --td-chat-item-think-inner-border-margin-left: 0px;
    --td-chat-item-actions-list-margin: var(--td-comp-margin-xs) 0;
    --td-chat-item-text-actions-list-margin: var(--td-comp-margin-xs) 0 0 var(--td-comp-margin-l);
    --td-chat-item-actions-list-gap: var(--td-comp-margin-xs);
    --td-chat-item-actions-list-padding: var(--td-comp-paddingTB-xs) var(--td-comp-paddingLR-xs);
    --td-chat-item-actions-list-radius: var(--td-radius-medium);
    --td-chat-item-actions-list-border: 1px solid var(--td-component-border);
    --td-chat-item-actions-item-padding: var(--td-comp-paddingTB-xs) var(--td-comp-paddingLR-xs);
    --td-chat-item-actions-item-radius: 4px;
    --td-chat-item-attachments-margin-top: 12px;
    --td-chat-item-image-max-width: 150px;
    --td-attachment-image-width: 150px;
    --td-chat-item-search-height: 36px;
    --td-chat-item-search-padding: var(--td-comp-paddingTB-s) var(--td-comp-paddingLR-s);
    --td-chat-item-search-radius: 20px;
    --td-chat-item-search-icons-margin-right: 3px;
    --td-chat-item-search-icon-width: 16px;
    --td-chat-item-search-icon-radius: var(--td-radius-circle);
    --td-chat-item-search-icon-margin-left: -3px;
    --td-chat-item-search-icon-before-left: -1px;
    --td-chat-item-search-icon-before-width: 1px;
    --td-chat-item-search-icon-before-height: 100%;
    --td-chat-item-search-icon-before-radius: 1px;
    --td-chat-item-search-link-color: var(--td-brand-color);
    --td-chat-item-search-link-hov-color: var(--td-brand-color-hover);
    --td-chat-item-suggestion-gap: var(--td-comp-margin-s);
    --td-chat-item-suggestion-height: 38px;
    --td-chat-item-suggestion-padding: var(--td-comp-paddingTB-s) var(--td-comp-paddingLR-m);
    --td-chat-item-suggestion-radius: var(--td-radius-medium);
    --td-chat-item-suggestion-border: solid 1px var(--td-component-border);
    --td-chat-item-suggestion-arrow-margin: var(--td-comp-margin-s);
    --td-chat-font-size: 16px;
    --td-chat-item-system-font-size: 12px;
    --td-chat-item-suggestion-font-size: 14px;
    --td-chat-item-search-link-line-height: 24px;
    --td-chat-list-scroll-button-font-size: 24px;
    --td-chat-search-font-size: 12px;
    --td-chat-item-content-text-align: left;
    --td-chat-item-right-content-text-align: right;
    --td-chat-item-text-text-align: left;
    --td-chat-list-scroll-button-bg: var(--td-bg-color-container);
    --td-chat-list-scroll-button-shadow: 0px 8px 10px -5px rgba(0, 0, 0, 0.08), 0px 16px 24px 2px rgba(0, 0, 0, 0.04), 0px 6px 30px 5px rgba(0, 0, 0, 0.05);
    --td-chat-item-error-color: var(--td-error-color);
    --td-chat-item-primary-bg: var(--td-bg-color-secondarycontainer);
    --td-chat-item-default-bg: var(--td-bg-color-container);
    --td-chat-item-outline-border-color: var(--td-component-border);
    --td-chat-item-think-bg: var(--td-bg-color-secondarycontainer);
    --td-chat-item-think-pending-border-bg-color: #e0f0ff;
    --td-chat-item-think-status-pending-color: var(--td-brand-color);
    --td-chat-item-think-status-sent-color: var(--td-success-color);
    --td-chat-item-think-status-error-color: var(--td-error-color);
    --td-chat-item-think-content-color: var(--td-text-color-placeholder);
    --td-chat-item-actions-list-bg: var(--td-bg-color-secondarycontainer);
    --td-chat-item-actions-item-hover-bg: var(--td-bg-color-component-hover);
    --td-chat-item-suggestion-color: var(--td-text-color-primary);
    --td-chat-item-suggestion-background: var(--td-bg-color-secondarycontainer);
    --td-chat-item-suggestion-arrow-color: var(--td-text-color-placeholder);

    /* ===== chat-md（markdown 排版） ===== */
    --md-heading-color: var(--td-gray-color-7);
    --td-chat-md-content-gap-main: 0 0 8px 0;
    --td-chat-md-content-gap-t1: 24px 0 20px 0;
    --td-chat-md-content-gap-t2: 20px 0 16px 0;
    --td-chat-md-content-gap-t3: 16px 0 12px 0;
    --td-chat-md-font: var(--td-text-color-primary);
    --td-chat-md-padding: var(--td-comp-paddingTB-m) 0;
    --td-chat-md-h1-font: 700 22px / 1.6 var(--td-font-family);
    --td-chat-md-h2-font: 600 20px / 1.6 var(--td-font-family);
    --td-chat-md-h3-font: 600 18px / 1.6 var(--td-font-family);
    --td-chat-md-s-color: var(--td-gray-color-7);
    --td-chat-md-list-margin: 0 0 8px 2em;
    --td-chat-md-list-padding: 0;
    --td-chat-md-ul-style: disc;
    --td-chat-md-ol-style: decimal;
    --td-chat-md-li-margin: 0.5em 0;
    --td-chat-md-link-color: var(--td-brand-color-5);
    --td-chat-md-link-decoration: none;
    --td-chat-md-link-hover-color: var(--td-brand-color-6);
    --td-chat-md-code-radius: 8px;
    --td-chat-md-code-margin: 0 0 16px 0;
    --td-chat-md-code-header-height: 36px;
    --td-chat-md-code-header-padding: 0 16px 0 12px;
    --td-chat-md-code-header-font: 500 14px / 1.6 var(--td-font-family);
    --td-chat-md-code-header-bg: #f3f3f3;
    --td-chat-md-code-header-bg-dark: #282c34;
    --td-chat-md-code-header-color-dark: #abb2bf;
    --td-chat-md-code-header-copy-color: var(--td-gray-color-7);
    --td-chat-md-code-header-copy-hover-color: var(--td-gray-color-9);
    --td-chat-md-code-body-padding: 10px 16px !important;
    --td-chat-md-code-body-bg: #f8f8f8;
    --td-chat-md-code-body-overflow: auto;
    --td-chat-md-code-body-code-font-size: 14px;
    --td-chat-md-katex-block-margin: 1em 0;
    --td-chat-md-katex-font: normal 1.21em / 1.2 KaTeX_Main, Times New Roman, serif;
    --td-chat-md-blockquote-margin: 16px 0;
    --td-chat-md-blockquote-padding: 10px 15px;
    --td-chat-md-blockquote-border-left: 4px solid #d9d9d9;
    --td-chat-md-blockquote-color: var(--td-gray-color-7);
    --td-chat-md-footnote-bg: var(--td-bg-color-page);
    --td-chat-md-hr-margin: 16px 0;
    --td-chat-md-hr-border: 1px solid rgba(0, 0, 0, 0.08);
    --td-chat-md-table-border: 1px solid var(--td-bg-color-secondarycontainer);
    --td-chat-md-table-radius: 8px;
    --td-chat-md-table-margin: 8px 0;
    --td-chat-md-table-font-size: 14px;
    --td-chat-md-table-th-padding: 0.66em 1em;
    --td-chat-md-table-th-max-width: 448px;
    --td-chat-md-table-th-bg: var(--td-bg-color-secondarycontainer);
    --td-chat-md-table-th-color: var(--td-text-color-primary);
    --td-chat-md-table-th-font: 700 14px / 1.6 var(--td-font-family);
    --td-chat-md-table-td-bg-odd: var(--td-bg-color-container);
    --td-chat-md-table-td-bg-even: var(--td-bg-color-secondarycontainer);
    --td-chat-md-table-td-color: var(--td-text-color-primary);
    --td-chat-md-table-td-font: 400 14px / 1.6 var(--td-font-family);

    /* ===== SDK 尺寸覆盖：AI 回复自适应弹窗宽度 + 压缩输入组件 ===== */
    --td-chat-item-content-max-width: 100%;
    --td-chat-input-padding: 8px 12px;
    --td-chat-input-font-size: 14px;
  `;
}

/** 完整 CSS 样式表 */
function getStyles(config: ResolvedConfig): string {
  return `
/* ChatbotSDK 样式 - csk- 命名空间 */
.csk-root {
  ${tdThemeVars(config)}
  ${tdChatVars()}
  ${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; }

/* 原生表单控件字体继承（UA 默认不继承 font，宿主无 reset 时用系统字体） */
.csk-root button, .csk-root input, .csk-root textarea, .csk-root select { font-family: inherit; }
/* launcher/teaser 挂在 body、在 .csk-root 之外，补 box-sizing 防御宿主全局 reset */
.csk-launcher, .csk-teaser { box-sizing: border-box; }
.csk-launcher *, .csk-teaser * { box-sizing: border-box; }

/* ===== t-tag（light DOM 组件）样式补注入 =====
 * t-tag 是 tdesign-web-components 的 light DOM 组件（isLightDOM: true），其 .t-tag
 * 样式定义在 globalCSS 的 constructable stylesheet 里，但 globalCSS 只对 shadow DOM
 * 生效、进不了 light DOM，导致快捷问题/建议标签"裸奔"。此处把 .t-tag 样式补进 light DOM。
 * 来源：tdesign-web-components v1.2.10 的 _chunks/dep-5245073d.js（css_248z）。 */
.csk-root .t-tag {
  font: var(--td-font-body-medium);
  color: var(--td-text-color-primary);
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  list-style: none;
  display: inline-flex;
  align-items: center;
  flex-direction: row;
  padding: 0px var(--td-comp-paddingLR-s);
  height: var(--td-comp-size-xs);
  font: var(--td-font-body-small);
  color: var(--td-text-color-anti);
  border-radius: var(--td-radius-default);
  border: 1px solid transparent;
  white-space: nowrap;
}
.csk-root .t-tag .t-icon {
  margin-right: var(--td-comp-margin-xs);
  width: calc(var(--td-font-size-body-medium) + 2px);
  height: calc(var(--td-font-size-body-medium) + 2px);
  flex-shrink: 0;
}
.csk-root .t-tag .t-tag__icon-close {
  margin-right: 0;
  margin-left: var(--td-comp-margin-s);
  font: var(--td-font-body-medium);
  cursor: pointer;
  transition: color 0.2s cubic-bezier(0.38, 0, 0.24, 1);
}
.csk-root .t-tag--default { color: var(--td-text-color-primary); background-color: var(--td-bg-color-component); }
.csk-root .t-tag--default .t-tag__icon-close { color: var(--td-text-color-placeholder); }
.csk-root .t-tag--default .t-tag__icon-close:hover { color: var(--td-text-color-primary); }
.csk-root .t-tag--default:active { cursor: default; }
.csk-root .t-tag--default.t-tag--disabled {
  color: var(--td-text-color-disabled);
  background-color: var(--td-bg-color-component-disabled);
  border-color: var(--td-component-border);
  cursor: not-allowed;
}
.csk-root .t-tag--default.t-tag--disabled:hover { cursor: not-allowed; }
.csk-root .t-tag--default.t-tag--disabled .t-icon:hover { cursor: pointer; }
.csk-root .t-tag--default.t-tag--outline { border-color: var(--td-component-border); }
.csk-root .t-tag--default.t-tag--light { background-color: var(--td-bg-color-secondarycontainer); }
.csk-root .t-tag--default.t-tag--light-outline { border-color: var(--td-component-border); background-color: var(--td-bg-color-secondarycontainer); }
.csk-root .t-tag--primary { background-color: var(--td-brand-color); }
.csk-root .t-tag--primary.t-tag--outline { border-color: var(--td-brand-color); }
.csk-root .t-tag--primary.t-tag--light { background-color: var(--td-brand-color-light); }
.csk-root .t-tag--primary.t-tag--light-outline { border-color: var(--td-brand-color); background-color: var(--td-brand-color-light); }
.csk-root .t-tag--primary.t-tag--light,
.csk-root .t-tag--primary.t-tag--outline,
.csk-root .t-tag--primary.t-tag--light-outline { color: var(--td-brand-color); }
.csk-root .t-tag--success { background-color: var(--td-success-color); }
.csk-root .t-tag--success.t-tag--outline { border-color: var(--td-success-color); }
.csk-root .t-tag--success.t-tag--light { background-color: var(--td-success-color-light); }
.csk-root .t-tag--success.t-tag--light-outline { border-color: var(--td-success-color); background-color: var(--td-success-color-light); }
.csk-root .t-tag--success.t-tag--light,
.csk-root .t-tag--success.t-tag--outline,
.csk-root .t-tag--success.t-tag--light-outline { color: var(--td-success-color); }
.csk-root .t-tag--warning { background-color: var(--td-warning-color); }
.csk-root .t-tag--warning.t-tag--outline { border-color: var(--td-warning-color); }
.csk-root .t-tag--warning.t-tag--light { background-color: var(--td-warning-color-light); }
.csk-root .t-tag--warning.t-tag--light-outline { border-color: var(--td-warning-color); background-color: var(--td-warning-color-light); }
.csk-root .t-tag--warning.t-tag--light,
.csk-root .t-tag--warning.t-tag--outline,
.csk-root .t-tag--warning.t-tag--light-outline { color: var(--td-warning-color); }
.csk-root .t-tag--danger { background-color: var(--td-error-color); }
.csk-root .t-tag--danger.t-tag--outline { border-color: var(--td-error-color); }
.csk-root .t-tag--danger.t-tag--light { background-color: var(--td-error-color-light); }
.csk-root .t-tag--danger.t-tag--light-outline { border-color: var(--td-error-color); background-color: var(--td-error-color-light); }
.csk-root .t-tag--danger .t-tag__icon-close { fill: var(--td-error-color); }
.csk-root .t-tag--danger .t-tag__icon-close:hover { fill: var(--td-error-color-hover); }
.csk-root .t-tag--danger.t-tag--light,
.csk-root .t-tag--danger.t-tag--outline,
.csk-root .t-tag--danger.t-tag--light-outline { color: var(--td-error-color); }
.csk-root .t-tag.t-tag--outline { background: transparent; }
.csk-root .t-tag.t-size-s { padding: 0px var(--td-comp-paddingLR-xs); height: var(--td-comp-size-xxs); font: var(--td-font-body-small); }
.csk-root .t-tag.t-size-s .t-icon { font-size: var(--td-font-body-small); }
.csk-root .t-tag.t-size-l { padding: 0px var(--td-comp-paddingLR-m); height: var(--td-comp-size-m); font: var(--td-font-body-medium); }
.csk-root .t-tag.t-size-l .t-icon { font: var(--td-font-body-medium); }
.csk-root .t-tag.t-tag--round { border-radius: var(--td-radius-extraLarge); }
.csk-root .t-tag.t-tag--mark { border-radius: 0 var(--td-radius-extraLarge) var(--td-radius-extraLarge) 0; }
.csk-root .t-tag.t-tag--ellipsis .t-tag--text { display: inline-block; white-space: nowrap; word-wrap: normal; overflow: hidden; text-overflow: ellipsis; }
.csk-root .t-tag.t-tag--check:not(.t-tag--disabled) { transition: background-color 0.2s cubic-bezier(0.38, 0, 0.24, 1); cursor: pointer; }
.csk-root .t-tag.t-tag--check:not(.t-tag--disabled).t-tag--default.t-tag--dark:not(.t-tag--checked):hover { background-color: var(--td-bg-color-component-hover); }
.csk-root .t-tag.t-tag--check:not(.t-tag--disabled).t-tag--primary.t-tag--dark.t-tag--checked:hover { background-color: var(--td-brand-color-hover); }
.csk-root .t-tag.t-tag--check:not(.t-tag--disabled).t-tag--default.t-tag--outline:not(.t-tag--checked):hover { color: var(--td-brand-color-hover); }
.csk-root .t-tag--check.t-tag--disabled.t-tag--primary.t-tag--dark { background-color: var(--td-brand-color-disabled); cursor: not-allowed; }
.csk-root .t-tag--check.t-tag--disabled.t-tag--primary.t-tag--outline { color: var(--td-text-color-disabled); background-color: var(--td-bg-color-component-disabled); border-color: var(--td-text-color-disabled); cursor: not-allowed; }
.csk-root .t-check-tag-group .t-tag:not(:last-child) { margin-right: var(--td-comp-margin-s); }
.csk-root a .t-tag { cursor: pointer; transition: all 0.2s linear; }
.csk-root a .t-tag:hover { color: var(--td-brand-color); background-color: var(--td-bg-color-component-hover); }
.csk-root a .t-tag:active { color: var(--td-brand-color-active); background-color: var(--td-bg-color-component-active); }

/* ========== 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: 100%;
  height: 100%;
  object-fit: cover;
  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;
}

/* ========== 消息区 ========== */
.csk-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  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; }

/* 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 */
/* 注意：.csk-msg 为块级纵向容器。头像 + 气泡的横向对齐由 t-chat-item 内部（placement 属性）完成，
   sources / suggestions 直接 append 到 wrapper 末尾，须纵向堆叠在气泡下方，不能用 flex row 排布 */
.csk-msg {
  margin-bottom: 16px;
  max-width: 100%;
  word-break: break-word;
  animation: csk-msg-in 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

@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; }
}

/* ========== 输入区 ========== */
.csk-input-area {
  padding: 8px 12px 10px;
  background: #fff;
  border-top: 1px solid var(--csk-border);
  flex-shrink: 0;
}

/* ========== 保密声明脚注 ========== */
.csk-disclaimer {
  margin-top: 4px;
  padding: 4px 8px 2px;
  font-size: 10px;
  color: #9CA3AF;
  line-height: 1.4;
  user-select: none;
  cursor: pointer;
}
.csk-disclaimer__title {
  font-weight: 600;
  margin-bottom: 2px;
  color: #9CA3AF;
}
/* 折叠态：默认只显示首行（标题），其余条文隐藏；标题末尾加 ▾ 提示可展开 */
.csk-disclaimer > :not(:first-child) { display: none; }
.csk-disclaimer > :first-child::after { content: ' ▾'; }
.csk-disclaimer--expanded > :not(:first-child) { display: block; }
.csk-disclaimer--expanded > :first-child::after { content: ' ▴'; }
.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;
}

/* ========== P1: RAG 引用来源卡片 ========== */
.csk-sources {
  margin-top: 8px;
  max-width: 100%;
  font-size: 12px;
}
.csk-sources__body {
  margin-top: 6px;
  border: 1px solid var(--csk-border);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}
.csk-sources--collapsed .csk-sources__body { display: none; }
.csk-source-item {
  padding: 6px 10px;
  border-bottom: 1px solid #F0F1F4;
  transition: background 0.15s;
}
.csk-source-item:last-child { border-bottom: none; }
.csk-source-item:hover { background: var(--csk-bg-ai); }
.csk-source-item__name {
  font-weight: 500;
  color: #1F2937;
  margin-bottom: 2px;
}
.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: 2px;
}

/* ========== 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;
}

/* ========== 推荐问题（suggest-message-list） ========== */
.csk-suggestions {
  margin-top: 6px;
  padding: 4px 0 0 0;
}
.csk-suggestions__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ========== 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; }

/* ========== 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-border-strong: #454560;
  --csk-text-secondary: rgba(255, 255, 255, 0.6);
  --csk-text-muted: rgba(255, 255, 255, 0.4);
  --csk-bg-app: #141421;
  /* TDesign 底层语义变量暗色覆盖：让 t-chat-item/t-chat-sender/t-tag 等适配暗色
     语义变量（--td-bg-color-container / --td-text-color-primary 等）都引用这几个底层变量 */
  --td-gray-color-1: #1E1E2E;
  --td-gray-color-2: #141421;
  --td-gray-color-3: #3B3B52;
  --td-gray-color-4: #454560;
  --td-font-gray-1: rgba(255, 255, 255, 0.9);
  --td-font-gray-2: rgba(255, 255, 255, 0.6);
  --td-font-gray-3: rgba(255, 255, 255, 0.4);
  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-input-area { background: #1A1A2E; border-top-color: var(--csk-border); }
.csk-dark .csk-category-bar { background: #1A1A2E; border-top-color: var(--csk-border); }
.csk-dark .csk-sources__body { background: #1E1E2E; border-color: var(--csk-border); }
.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-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-welcome__title { color: #E2E8F0; }
.csk-dark .csk-welcome__desc { color: #6B7280; }
.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-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); }

/* 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); }
}

/* ========== 点踩原因选择面板 ========== */
.csk-feedback-reason {
  position: relative;
  margin-top: 6px;
  padding: 10px 12px;
  background: #fff;
  border: 1px solid var(--csk-border);
  border-radius: 8px;
  animation: csk-fade-in 0.15s ease;
}
.csk-feedback-reason__title {
  font-size: 12px;
  color: var(--csk-text-muted);
  margin-bottom: 8px;
}
.csk-feedback-reason__options {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}
.csk-feedback-reason__btn {
  padding: 4px 10px;
  font-size: 12px;
  border: 1px solid var(--csk-border);
  border-radius: 14px;
  background: #fff;
  color: #1F2937;
  cursor: pointer;
  transition: all 0.15s ease;
}
.csk-feedback-reason__btn:hover {
  border-color: var(--csk-primary);
  color: var(--csk-primary);
  background: rgba(var(--csk-primary-rgb), 0.08);
}
.csk-feedback-reason__comment-row {
  display: flex;
  gap: 6px;
}
.csk-feedback-reason__comment {
  flex: 1;
  padding: 4px 8px;
  font-size: 12px;
  border: 1px solid var(--csk-border);
  border-radius: 6px;
  background: #fff;
  color: #1F2937;
  outline: none;
}
.csk-feedback-reason__comment:focus { border-color: var(--csk-primary); }
.csk-feedback-reason__submit {
  padding: 4px 10px;
  font-size: 12px;
  border: none;
  border-radius: 6px;
  background: var(--csk-primary);
  color: #fff;
  cursor: pointer;
  white-space: nowrap;
}
.csk-feedback-reason__close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 18px;
  height: 18px;
  border: none;
  background: none;
  color: var(--csk-text-muted);
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
}
.csk-feedback-reason__close:hover { color: #1F2937; background: #F3F4F6; }
.csk-dark .csk-feedback-reason { background: #1A1A2E; border-color: var(--csk-border); }
.csk-dark .csk-feedback-reason__btn {
  background: rgba(255,255,255,0.06);
  border-color: var(--csk-border);
  color: #E2E8F0;
}
.csk-dark .csk-feedback-reason__btn:hover {
  border-color: var(--csk-primary-light);
  color: var(--csk-primary-light);
  background: rgba(var(--csk-primary-rgb), 0.15);
}
.csk-dark .csk-feedback-reason__comment {
  background: rgba(255,255,255,0.06);
  border-color: var(--csk-border);
  color: #E2E8F0;
}

/* ========== 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());
}