/**
 * AegisAuth 统一验证码组件样式 (CaptchaWidget)
 * +----------------------------------------------------------------------
 * | 覆盖：
 * | 1. 容器与基础布局
 * | 2. 滑块验证码（slider）
 * | 3. 点选验证码（click）
 * | 4. 文字验证码（text）
 * | 5. 旋转验证码（rotate）
 * | 6. 算术验证码（arithmetic）
 * | 7. 拖拽验证码（drag）
 * | 8. 语义理解验证码（semantic）
 * | 9. 手势轨迹验证码（gesture）
 * | 10. 字符重组验证码（reorder）
 * | 11. 数学逻辑验证码（math_logic）
 * | 12. 颜色匹配验证码（color_match）
 * | 13. 图形计数验证码（shape_count）
 * | 14. 拼图验证码（puzzle）
 * | 15. 序列推理验证码（sequence）
 * | 16. 词语选择验证码（word_select）
 * | 17. 音频验证码（audio）无障碍
 * | 18. 镜像判断验证码（mirror）
 * | 19. 第三方验证码容器（tencent/geetest/recaptcha）
 * | 20. 加载/错误/成功状态
 * | 21. 响应式适配（触摸区域 ≥ 44×44px）
 * | 22. 暗色模式（prefers-color-scheme: dark 与 data-theme="dark"）
 * +----------------------------------------------------------------------
 */

/* +----------------------------------------------------------------------
   | 基础变量
   +---------------------------------------------------------------------- */
.captcha-widget {
    --captcha-primary: #2E6C6F;
    --captcha-primary-light: #3A8589;
    --captcha-primary-dark: #1F4D50;
    --captcha-bg: #ffffff;
    --captcha-bg-secondary: #f5f7fa;
    --captcha-border: #e0e6ed;
    --captcha-text: #333333;
    --captcha-text-secondary: #6b7280;
    --captcha-danger: #ef4444;
    --captcha-success: #22c55e;
    --captcha-warning: #f59e0b;
    --captcha-radius: 8px;
    --captcha-font-size: 14px;
    --captcha-transition: all 0.2s ease;

    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: var(--captcha-font-size);
    color: var(--captcha-text);
    background: var(--captcha-bg);
    border: 1px solid var(--captcha-border);
    border-radius: var(--captcha-radius);
    padding: 16px;
    box-sizing: border-box;
    max-width: 100%;
    line-height: 1.5;
}

.captcha-widget * {
    box-sizing: border-box;
}

/* +----------------------------------------------------------------------
   | 通用按钮
   +---------------------------------------------------------------------- */
.captcha-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--captcha-border);
    border-radius: 6px;
    background: var(--captcha-bg);
    color: var(--captcha-text);
    cursor: pointer;
    transition: var(--captcha-transition);
    white-space: nowrap;
    user-select: none;
    line-height: 1.4;
}

.captcha-btn:hover {
    border-color: var(--captcha-primary);
    color: var(--captcha-primary);
}

.captcha-btn:active {
    transform: scale(0.97);
}

.captcha-btn-primary {
    background: var(--captcha-primary);
    border-color: var(--captcha-primary);
    color: #ffffff;
}

.captcha-btn-primary:hover {
    background: var(--captcha-primary-light);
    border-color: var(--captcha-primary-light);
    color: #ffffff;
}

.captcha-btn-refresh {
    padding: 4px 8px;
    font-size: 16px;
    border: none;
    background: transparent;
    opacity: 0.6;
    min-width: 44px;
    min-height: 44px;
}

.captcha-btn-refresh::before {
    content: "↻";
    font-size: 16px;
    line-height: 1;
}

.captcha-btn-refresh:hover {
    opacity: 1;
    background: var(--captcha-bg-secondary);
    border: none;
    color: var(--captcha-primary);
}

/* 重试按钮：验证码加载失败时显示在错误提示旁 */
.captcha-btn-retry {
    padding: 4px 12px;
    font-size: 13px;
    border: 1px solid var(--captcha-border, #d0d0d0);
    background: var(--captcha-bg-secondary, #f5f5f5);
    color: var(--captcha-primary, #1a3a3d);
    border-radius: 4px;
    cursor: pointer;
    margin-left: 8px;
    white-space: nowrap;
}

.captcha-btn-retry:hover {
    background: var(--captcha-primary, #1a3a3d);
    color: #ffffff;
    border-color: var(--captcha-primary, #1a3a3d);
}

.captcha-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 8px;
}

/* +----------------------------------------------------------------------
   | 加载状态
   +---------------------------------------------------------------------- */
.captcha-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    gap: 12px;
    color: var(--captcha-text-secondary);
}

.captcha-loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--captcha-border);
    border-top-color: var(--captcha-primary);
    border-radius: 50%;
    animation: captcha-spin 0.8s linear infinite;
}

@keyframes captcha-spin {
    to {
        transform: rotate(360deg);
    }
}

/* +----------------------------------------------------------------------
   | 消息提示
   +---------------------------------------------------------------------- */
.captcha-message {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 13px;
}

.captcha-message-icon {
    font-size: 16px;
    flex-shrink: 0;
}

.captcha-message-text {
    flex: 1;
}

.captcha-message-loading {
    background: var(--captcha-bg-secondary);
    color: var(--captcha-text-secondary);
}

.captcha-message-error {
    background: #fef2f2;
    color: var(--captcha-danger);
}

.captcha-message-warning {
    background: #fffbeb;
    color: var(--captcha-warning);
}

.captcha-message-success {
    background: #f0fdf4;
    color: var(--captcha-success);
}

/* +----------------------------------------------------------------------
   | 成功状态
   +---------------------------------------------------------------------- */
.captcha-success {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: 6px;
    color: var(--captcha-success);
    font-size: 14px;
}

.captcha-success-icon {
    font-size: 18px;
}

.captcha-success-text {
    flex: 1;
    font-weight: 500;
}

/* +----------------------------------------------------------------------
   | 滑块验证码
   +---------------------------------------------------------------------- */
.captcha-slider {
    width: 100%;
}

.captcha-slider-image {
    position: relative;
    width: 100%;
    max-width: 300px;
    /* 用 aspect-ratio 锁定 2:1 宽高比，避免 object-fit: cover 裁剪导致缺口坐标错位 */
    aspect-ratio: 2 / 1;
    height: auto;
    margin: 0 auto 12px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--captcha-bg-secondary);
}

.captcha-bg-image {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: fill;
}

.captcha-slider-piece {
    position: absolute;
    left: 0;
    top: 0;
    /* 用百分比让拼图块随背景图等比缩放（50/300 ≈ 16.667%，50/150 ≈ 33.333%），
       确保拼图块尺寸与背景缺口尺寸在任何显示宽度下都一致 */
    width: 16.667%;
    height: 33.333%;
    pointer-events: none;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.captcha-slider-track {
    position: relative;
    width: 100%;
    /* 与 .captcha-slider-image 同宽，确保滑块手柄的轨道空间与背景图显示空间 1:1 对应，
       拖动时拼图块位置与手柄位置一致 */
    max-width: 300px;
    margin: 0 auto;
    height: 40px;
    background: var(--captcha-bg-secondary);
    border: 1px solid var(--captcha-border);
    border-radius: 20px;
    overflow: hidden;
}

.captcha-slider-progress {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--captcha-primary-light), var(--captcha-primary));
    border-radius: 20px;
    transition: width 0.1s ease;
}

.captcha-slider-handle {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background: #ffffff;
    border: 1px solid var(--captcha-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: grab;
    font-size: 18px;
    color: var(--captcha-text-secondary);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
    transition: box-shadow 0.2s ease;
    z-index: 2;
    user-select: none;
    touch-action: none;
}

.captcha-slider-handle:hover {
    box-shadow: 0 2px 12px rgba(46, 108, 111, 0.3);
    color: var(--captcha-primary);
}

.captcha-slider-handle.dragging {
    cursor: grabbing;
    box-shadow: 0 4px 16px rgba(46, 108, 111, 0.4);
}

/* 键盘无障碍：role="slider" 聚焦时的可见焦点环 */
.captcha-slider-handle:focus-visible {
    outline: 2px solid var(--captcha-primary);
    outline-offset: 2px;
}

.captcha-slider-tip {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    font-size: 12px;
    color: var(--captcha-text-secondary);
    pointer-events: none;
    transition: opacity 0.2s ease;
}

/* 拖拽开始时 tip 淡出（captcha.js 添加 is-transparent 类）
   auth 页面不加载 base.css，此处自带的局部定义避免依赖外部工具类 */
.captcha-slider-tip.is-transparent {
    opacity: 0;
}

/* +----------------------------------------------------------------------
   | 点选验证码
   +---------------------------------------------------------------------- */
.captcha-click {
    width: 100%;
}

.captcha-click-tips {
    padding: 8px 12px;
    margin-bottom: 8px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 13px;
    color: var(--captcha-primary);
    font-weight: 500;
    text-align: center;
}

.captcha-click-image {
    position: relative;
    width: 100%;
    max-width: 300px;
    height: 150px;
    margin: 0 auto 8px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--captcha-bg-secondary);
}

.captcha-click-bg {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: crosshair;
}

.captcha-click-canvas {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* +----------------------------------------------------------------------
   | 文字验证码
   +---------------------------------------------------------------------- */
.captcha-text {
    width: 100%;
}

.captcha-text-image {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.captcha-text-image img {
    height: 40px;
    border-radius: 4px;
    border: 1px solid var(--captcha-border);
    background: var(--captcha-bg-secondary);
}

.captcha-text-input {
    display: flex;
    gap: 8px;
}

.captcha-input {
    flex: 1;
    padding: 8px 12px;
    font-size: 14px;
    border: 1px solid var(--captcha-border);
    border-radius: 6px;
    background: var(--captcha-bg);
    color: var(--captcha-text);
    transition: var(--captcha-transition);
    outline: none;
}

.captcha-input:focus {
    border-color: var(--captcha-primary);
    box-shadow: 0 0 0 3px rgba(46, 108, 111, 0.1);
}

.captcha-input::placeholder {
    color: var(--captcha-text-secondary);
}

/* +----------------------------------------------------------------------
   | 旋转验证码
   +---------------------------------------------------------------------- */
.captcha-rotate {
    width: 100%;
}

.captcha-rotate-image {
    display: flex;
    justify-content: center;
    margin-bottom: 12px;
}

.captcha-rotate-img {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--captcha-border);
    transition: transform 0.1s ease;
}

.captcha-rotate-control {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.captcha-rotate-slider {
    flex: 1;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--captcha-bg-secondary);
    border-radius: 3px;
    outline: none;
}

.captcha-rotate-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--captcha-primary);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.captcha-rotate-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--captcha-primary);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.captcha-rotate-angle {
    min-width: 48px;
    text-align: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--captcha-primary);
}

/* +----------------------------------------------------------------------
   | 算术验证码
   +---------------------------------------------------------------------- */
.captcha-arithmetic {
    width: 100%;
}

.captcha-arithmetic-question {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.captcha-arithmetic-img {
    height: 40px;
    border-radius: 4px;
    border: 1px solid var(--captcha-border);
    background: var(--captcha-bg-secondary);
}

.captcha-arithmetic-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--captcha-text);
}

.captcha-arithmetic-input {
    display: flex;
    gap: 8px;
}

/* +----------------------------------------------------------------------
   | 拖拽验证码（drag）— 将实心形状拖拽到目标轮廓
   +---------------------------------------------------------------------- */
.captcha-drag {
    width: 100%;
}

.captcha-drag-tip {
    padding: 8px 12px;
    margin-bottom: 8px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 13px;
    color: var(--captcha-primary);
    font-weight: 500;
    text-align: center;
}

.captcha-drag-canvas {
    position: relative;
    width: 100%;
    max-width: 320px;
    height: 180px;
    margin: 0 auto 8px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--captcha-bg-secondary);
    touch-action: none;
}

.captcha-drag-bg {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    user-select: none;
    -webkit-user-drag: none;
}

/* +----------------------------------------------------------------------
   | 语义理解验证码（semantic）— 图标网格点击选择
   +---------------------------------------------------------------------- */
.captcha-semantic {
    width: 100%;
}

.captcha-semantic-prompt {
    padding: 8px 12px;
    margin-bottom: 8px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 13px;
    color: var(--captcha-primary);
    font-weight: 500;
    text-align: center;
}

.captcha-semantic-image {
    position: relative;
    width: 100%;
    max-width: 300px;
    height: 200px;
    margin: 0 auto 8px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--captcha-bg-secondary);
}

.captcha-semantic-bg {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    user-select: none;
    -webkit-user-drag: none;
}

.captcha-semantic-canvas {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* +----------------------------------------------------------------------
   | 手势轨迹验证码（gesture）— 画布绘制手势
   +---------------------------------------------------------------------- */
.captcha-gesture {
    width: 100%;
}

.captcha-gesture-tip {
    padding: 8px 12px;
    margin-bottom: 8px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 13px;
    color: var(--captcha-primary);
    font-weight: 500;
    text-align: center;
}

.captcha-gesture-canvas {
    position: relative;
    width: 100%;
    max-width: 320px;
    height: 200px;
    margin: 0 auto 8px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--captcha-bg-secondary);
    touch-action: none;
}

.captcha-gesture-bg {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    user-select: none;
    -webkit-user-drag: none;
    opacity: 0.85;
}

.captcha-gesture-draw {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    cursor: crosshair;
    touch-action: none;
}

/* +----------------------------------------------------------------------
   | 字符重组验证码（reorder）— 字符块点击交换排序
   +---------------------------------------------------------------------- */
.captcha-reorder {
    width: 100%;
}

.captcha-reorder-tip {
    padding: 8px 12px;
    margin-bottom: 8px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 13px;
    color: var(--captcha-primary);
    font-weight: 500;
    text-align: center;
}

.captcha-reorder-tiles {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: 8px;
    min-height: 48px;
}

.captcha-reorder-tile {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    min-height: 48px;
    padding: 8px 12px;
    font-size: 18px;
    font-weight: 600;
    color: var(--captcha-text);
    background: var(--captcha-bg);
    border: 1px solid var(--captcha-border);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--captcha-transition);
    user-select: none;
    touch-action: manipulation;
}

.captcha-reorder-tile:hover {
    border-color: var(--captcha-primary);
    color: var(--captcha-primary);
}

.captcha-reorder-tile.selected {
    background: var(--captcha-primary);
    border-color: var(--captcha-primary);
    color: #ffffff;
}

.captcha-reorder-tile:focus-visible {
    outline: 2px solid var(--captcha-primary);
    outline-offset: 2px;
}

/* +----------------------------------------------------------------------
   | 数学逻辑验证码（math_logic）— 问题+选项按钮或输入框
   +---------------------------------------------------------------------- */
.captcha-math-logic {
    width: 100%;
}

.captcha-math-logic-question {
    padding: 12px;
    margin-bottom: 10px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 15px;
    font-weight: 500;
    color: var(--captcha-text);
    line-height: 1.6;
}

.captcha-math-logic-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 8px;
    margin-bottom: 8px;
}

.captcha-math-logic-option {
    padding: 10px 12px;
    font-size: 14px;
    min-height: 44px;
}

.captcha-math-logic-option:hover {
    border-color: var(--captcha-primary);
    color: var(--captcha-primary);
}

.captcha-math-logic-option.selected {
    background: var(--captcha-primary);
    border-color: var(--captcha-primary);
    color: #ffffff;
}

.captcha-math-logic-input {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

/* +----------------------------------------------------------------------
   | 颜色匹配验证码（color_match）— 色块网格点击
   +---------------------------------------------------------------------- */
.captcha-color-match {
    width: 100%;
}

.captcha-color-match-tip {
    padding: 8px 12px;
    margin-bottom: 8px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 13px;
    color: var(--captcha-primary);
    font-weight: 500;
    text-align: center;
}

.captcha-color-match-image {
    position: relative;
    width: 100%;
    max-width: 300px;
    height: 200px;
    margin: 0 auto 8px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--captcha-bg-secondary);
}

.captcha-color-match-bg {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    user-select: none;
    -webkit-user-drag: none;
}

/* +----------------------------------------------------------------------
   | 图形计数验证码（shape_count）— 图片+数字输入
   +---------------------------------------------------------------------- */
.captcha-shape-count {
    width: 100%;
}

.captcha-shape-count-tip {
    padding: 8px 12px;
    margin-bottom: 8px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 13px;
    color: var(--captcha-primary);
    font-weight: 500;
    text-align: center;
}

.captcha-shape-count-image {
    position: relative;
    width: 100%;
    max-width: 300px;
    height: 180px;
    margin: 0 auto 10px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--captcha-bg-secondary);
}

.captcha-shape-count-bg {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    user-select: none;
    -webkit-user-drag: none;
}

.captcha-shape-count-input {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

/* +----------------------------------------------------------------------
   | 拼图验证码（puzzle）— 拼图块点击交换
   +---------------------------------------------------------------------- */
.captcha-puzzle {
    width: 100%;
}

.captcha-puzzle-tip {
    padding: 8px 12px;
    margin-bottom: 8px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 13px;
    color: var(--captcha-primary);
    font-weight: 500;
    text-align: center;
}

.captcha-puzzle-image {
    position: relative;
    width: 100%;
    max-width: 300px;
    height: 180px;
    margin: 0 auto 8px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--captcha-bg-secondary);
}

.captcha-puzzle-bg {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    user-select: none;
    -webkit-user-drag: none;
}

.captcha-puzzle-pieces {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    margin-bottom: 8px;
}

.captcha-puzzle-piece {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    padding: 6px 10px;
    font-size: 15px;
    font-weight: 600;
    color: var(--captcha-text);
    background: var(--captcha-bg);
    border: 1px solid var(--captcha-border);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--captcha-transition);
    user-select: none;
    touch-action: manipulation;
}

.captcha-puzzle-piece:hover {
    border-color: var(--captcha-primary);
    color: var(--captcha-primary);
}

.captcha-puzzle-piece.selected {
    background: var(--captcha-primary);
    border-color: var(--captcha-primary);
    color: #ffffff;
}

.captcha-puzzle-piece:focus-visible {
    outline: 2px solid var(--captcha-primary);
    outline-offset: 2px;
}

/* +----------------------------------------------------------------------
   | 序列推理验证码（sequence）— 序列展示+选项/输入
   +---------------------------------------------------------------------- */
.captcha-sequence {
    width: 100%;
}

.captcha-sequence-tip {
    padding: 8px 12px;
    margin-bottom: 8px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 13px;
    color: var(--captcha-primary);
    font-weight: 500;
    text-align: center;
}

.captcha-sequence-display {
    padding: 14px 16px;
    margin-bottom: 10px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 17px;
    font-weight: 600;
    color: var(--captcha-text);
    text-align: center;
    font-family: "SF Mono", "Cascadia Code", Consolas, "Courier New", monospace;
    letter-spacing: 2px;
    word-break: break-all;
}

.captcha-sequence-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 8px;
    margin-bottom: 8px;
}

.captcha-sequence-option {
    padding: 10px 12px;
    font-size: 14px;
    min-height: 44px;
}

.captcha-sequence-option:hover {
    border-color: var(--captcha-primary);
    color: var(--captcha-primary);
}

.captcha-sequence-option.selected {
    background: var(--captcha-primary);
    border-color: var(--captcha-primary);
    color: #ffffff;
}

.captcha-sequence-input {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

/* +----------------------------------------------------------------------
   | 词语选择验证码（word_select）— 词语网格点击
   +---------------------------------------------------------------------- */
.captcha-word-select {
    width: 100%;
}

.captcha-word-select-prompt {
    padding: 8px 12px;
    margin-bottom: 8px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 13px;
    color: var(--captcha-primary);
    font-weight: 500;
    text-align: center;
}

.captcha-word-select-image {
    position: relative;
    width: 100%;
    max-width: 300px;
    height: 200px;
    margin: 0 auto 8px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--captcha-bg-secondary);
}

.captcha-word-select-bg {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    user-select: none;
    -webkit-user-drag: none;
}

.captcha-word-select-canvas {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* +----------------------------------------------------------------------
   | 音频验证码（audio）— 无障碍入口
   +---------------------------------------------------------------------- */
.captcha-audio {
    width: 100%;
}

.captcha-audio-tip {
    padding: 8px 12px;
    margin-bottom: 10px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 13px;
    color: var(--captcha-primary);
    font-weight: 500;
    text-align: center;
}

.captcha-audio-player {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    padding: 10px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
}

.captcha-audio-player audio {
    flex: 1;
    min-width: 0;
    height: 40px;
}

/* 自动播放被浏览器策略阻止时显示的提示 */
.captcha-audio-play-tip {
    width: 100%;
    margin-top: 6px;
    padding: 6px 10px;
    background: var(--captcha-bg-secondary);
    border-radius: 4px;
    font-size: 12px;
    color: var(--captcha-warning);
    text-align: center;
}

.captcha-audio-input {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

/* +----------------------------------------------------------------------
   | 镜像判断验证码（mirror）— 是/否按钮
   +---------------------------------------------------------------------- */
.captcha-mirror {
    width: 100%;
}

.captcha-mirror-tip {
    padding: 8px 12px;
    margin-bottom: 8px;
    background: var(--captcha-bg-secondary);
    border-radius: 6px;
    font-size: 13px;
    color: var(--captcha-primary);
    font-weight: 500;
    text-align: center;
}

.captcha-mirror-image {
    position: relative;
    width: 100%;
    max-width: 300px;
    height: 200px;
    margin: 0 auto 10px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--captcha-bg-secondary);
}

.captcha-mirror-bg {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    user-select: none;
    -webkit-user-drag: none;
}

.captcha-mirror-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 8px;
}

.captcha-mirror-actions .captcha-btn {
    flex: 1;
    min-height: 44px;
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 500;
}

.captcha-mirror-yes:hover {
    background: var(--captcha-success);
    border-color: var(--captcha-success);
    color: #ffffff;
}

.captcha-mirror-no:hover {
    background: var(--captcha-danger);
    border-color: var(--captcha-danger);
    color: #ffffff;
}

/* +----------------------------------------------------------------------
   | 选项选中态通用样式（option/tile/piece 选中）
   +---------------------------------------------------------------------- */
.captcha-math-logic-option.selected,
.captcha-sequence-option.selected {
    background: var(--captcha-primary);
    border-color: var(--captcha-primary);
    color: #ffffff;
}

/* +----------------------------------------------------------------------
   | 第三方验证码容器
   +---------------------------------------------------------------------- */
.captcha-tencent-trigger {
    display: flex;
    justify-content: center;
    padding: 16px;
}

.captcha-geetest-container {
    min-height: 50px;
    width: 100%;
}

.captcha-geetest-container iframe {
    width: 100% !important;
}

/* +----------------------------------------------------------------------
   | 响应式适配
   +---------------------------------------------------------------------- */
@media (max-width: 480px) {
    .captcha-widget {
        padding: 12px;
        font-size: 13px;
    }

    .captcha-click-image {
        max-width: 100%;
        height: 120px;
    }

    .captcha-slider-image {
        max-width: 100%;
        /* 移除固定 height: 120px，由 aspect-ratio: 2/1 自动计算高度，避免缺口坐标错位 */
    }

    .captcha-slider-track {
        max-width: 100%;
        height: 36px;
    }

    .captcha-slider-handle {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }

    .captcha-rotate-img {
        width: 130px;
        height: 130px;
    }

    .captcha-text-input,
    .captcha-arithmetic-input,
    .captcha-math-logic-input,
    .captcha-shape-count-input,
    .captcha-sequence-input,
    .captcha-audio-input {
        flex-direction: column;
    }

    .captcha-text-input .captcha-btn,
    .captcha-arithmetic-input .captcha-btn,
    .captcha-math-logic-input .captcha-btn,
    .captcha-shape-count-input .captcha-btn,
    .captcha-sequence-input .captcha-btn,
    .captcha-audio-input .captcha-btn {
        width: 100%;
    }

    .captcha-actions {
        flex-wrap: wrap;
    }

    /* 新增 12 类型的移动端适配：画布全宽、触摸区域 ≥ 44×44px */
    .captcha-drag-canvas,
    .captcha-gesture-canvas {
        max-width: 100%;
        height: 160px;
    }

    .captcha-semantic-image,
    .captcha-color-match-image,
    .captcha-word-select-image,
    .captcha-mirror-image {
        max-width: 100%;
        height: 170px;
    }

    .captcha-shape-count-image,
    .captcha-puzzle-image {
        max-width: 100%;
        height: 150px;
    }

    .captcha-reorder-tile {
        min-width: 44px;
        min-height: 44px;
        font-size: 16px;
        padding: 6px 10px;
    }

    .captcha-puzzle-piece {
        min-width: 44px;
        min-height: 44px;
        font-size: 14px;
        padding: 5px 8px;
    }

    .captcha-math-logic-options,
    .captcha-sequence-options {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }

    .captcha-math-logic-option,
    .captcha-sequence-option {
        min-height: 44px;
    }

    .captcha-sequence-display {
        font-size: 15px;
        letter-spacing: 1px;
    }

    .captcha-mirror-actions {
        flex-direction: column;
    }

    .captcha-mirror-actions .captcha-btn {
        width: 100%;
    }

    .captcha-audio-player audio {
        height: 36px;
    }
}

/* +----------------------------------------------------------------------
   | 暗色模式 (prefers-color-scheme: dark)
   +---------------------------------------------------------------------- */
@media (prefers-color-scheme: dark) {
    .captcha-widget {
        --captcha-bg: #1f2937;
        --captcha-bg-secondary: #111827;
        --captcha-border: #374151;
        --captcha-text: #f3f4f6;
        --captcha-text-secondary: #9ca3af;
        --captcha-primary-light: #4ab8bc;
    }

    .captcha-slider-handle {
        background: #374151;
        border-color: #4b5563;
        color: #d1d5db;
    }

    .captcha-slider-handle:hover {
        color: var(--captcha-primary-light);
    }

    .captcha-input {
        background: #111827;
        border-color: #374151;
        color: #f3f4f6;
    }

    .captcha-input:focus {
        border-color: var(--captcha-primary);
        box-shadow: 0 0 0 3px rgba(46, 108, 111, 0.2);
    }

    .captcha-message-error {
        background: #450a0a;
        color: #fca5a5;
    }

    .captcha-message-warning {
        background: #451a03;
        color: #fcd34d;
    }

    .captcha-message-success {
        background: #052e16;
        color: #86efac;
    }

    .captcha-success {
        background: #052e16;
        border-color: #14532d;
        color: #86efac;
    }

    .captcha-btn {
        background: #374151;
        border-color: #4b5563;
        color: #e5e7eb;
    }

    .captcha-btn:hover {
        border-color: var(--captcha-primary);
        color: var(--captcha-primary-light);
    }

    .captcha-btn-primary {
        background: var(--captcha-primary);
        border-color: var(--captcha-primary);
        color: #ffffff;
    }

    .captcha-btn-primary:hover {
        background: var(--captcha-primary-light);
        border-color: var(--captcha-primary-light);
    }

    .captcha-btn-refresh {
        background: transparent;
    }

    .captcha-btn-refresh:hover {
        background: #374151;
    }

    .captcha-slider-track,
    .captcha-click-image {
        background: #111827;
    }

    .captcha-text-image img,
    .captcha-arithmetic-img {
        background: #111827;
    }

    .captcha-rotate-slider {
        background: #374151;
    }

    /* 新增 12 类型暗色模式适配 */
    .captcha-drag-canvas,
    .captcha-gesture-canvas,
    .captcha-semantic-image,
    .captcha-color-match-image,
    .captcha-shape-count-image,
    .captcha-puzzle-image,
    .captcha-word-select-image,
    .captcha-mirror-image {
        background: #111827;
    }

    .captcha-reorder-tile,
    .captcha-puzzle-piece {
        background: #1f2937;
        border-color: #4b5563;
        color: #f3f4f6;
    }

    .captcha-reorder-tile:hover,
    .captcha-puzzle-piece:hover {
        border-color: var(--captcha-primary);
        color: var(--captcha-primary-light);
    }

    .captcha-reorder-tile.selected,
    .captcha-puzzle-piece.selected,
    .captcha-math-logic-option.selected,
    .captcha-sequence-option.selected {
        background: var(--captcha-primary);
        border-color: var(--captcha-primary);
        color: #ffffff;
    }

    .captcha-audio-player {
        background: #111827;
    }

    .captcha-gesture-bg {
        opacity: 0.75;
    }
}

/* +----------------------------------------------------------------------
   | 手动暗色模式（通过 data-theme="dark" 属性）
   +---------------------------------------------------------------------- */
[data-theme="dark"] .captcha-widget {
    --captcha-bg: #1f2937;
    --captcha-bg-secondary: #111827;
    --captcha-border: #374151;
    --captcha-text: #f3f4f6;
    --captcha-text-secondary: #9ca3af;
    --captcha-primary-light: #4ab8bc;
}

[data-theme="dark"] .captcha-slider-handle {
    background: #374151;
    border-color: #4b5563;
    color: #d1d5db;
}

[data-theme="dark"] .captcha-input {
    background: #111827;
    border-color: #374151;
    color: #f3f4f6;
}

[data-theme="dark"] .captcha-message-error {
    background: #450a0a;
    color: #fca5a5;
}

[data-theme="dark"] .captcha-message-warning {
    background: #451a03;
    color: #fcd34d;
}

[data-theme="dark"] .captcha-message-success {
    background: #052e16;
    color: #86efac;
}

[data-theme="dark"] .captcha-success {
    background: #052e16;
    border-color: #14532d;
    color: #86efac;
}

[data-theme="dark"] .captcha-btn {
    background: #374151;
    border-color: #4b5563;
    color: #e5e7eb;
}

[data-theme="dark"] .captcha-btn-primary {
    background: var(--captcha-primary);
    border-color: var(--captcha-primary);
    color: #ffffff;
}

[data-theme="dark"] .captcha-slider-track,
[data-theme="dark"] .captcha-click-image {
    background: #111827;
}

/* 新增 12 类型手动暗色模式适配 */
[data-theme="dark"] .captcha-drag-canvas,
[data-theme="dark"] .captcha-gesture-canvas,
[data-theme="dark"] .captcha-semantic-image,
[data-theme="dark"] .captcha-color-match-image,
[data-theme="dark"] .captcha-shape-count-image,
[data-theme="dark"] .captcha-puzzle-image,
[data-theme="dark"] .captcha-word-select-image,
[data-theme="dark"] .captcha-mirror-image {
    background: #111827;
}

[data-theme="dark"] .captcha-reorder-tile,
[data-theme="dark"] .captcha-puzzle-piece {
    background: #1f2937;
    border-color: #4b5563;
    color: #f3f4f6;
}

[data-theme="dark"] .captcha-reorder-tile.selected,
[data-theme="dark"] .captcha-puzzle-piece.selected,
[data-theme="dark"] .captcha-math-logic-option.selected,
[data-theme="dark"] .captcha-sequence-option.selected {
    background: var(--captcha-primary);
    border-color: var(--captcha-primary);
    color: #ffffff;
}

[data-theme="dark"] .captcha-audio-player {
    background: #111827;
}