/**
 * AI 定制教学方案 - 板块样式
 * 与主题既有的 .teaching-materials / .case-share-block 视觉语言保持一致
 *
 * @package CaseLibrary
 */

/* ===== 板块容器 ===== */
.ai-customize {
    margin: 32px 0;
    padding: 24px;
    background: #fff;
    border: 2px solid var(--primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.ai-customize-head { margin-bottom: 18px; }

.ai-customize-title {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.ai-customize-title .block-title {
    margin: 0;
    font-size: 18px;
    color: var(--text);
    border-bottom: none;
    padding-bottom: 0;
}

.ai-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .3px;
    white-space: nowrap;
}

.ai-ppt-jump {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border: 1px solid var(--primary);
    border-radius: 999px;
    background: #fff;
    font-size: 12.5px;
    color: var(--primary);
    white-space: nowrap;
    transition: background .18s, color .18s;
}

.ai-ppt-jump:hover {
    background: var(--primary);
    color: #fff;
}

.ai-customize-desc {
    margin: 10px 0 0;
    font-size: 13.5px;
    line-height: 1.8;
    color: var(--text-muted);
}

.ai-notice {
    margin-bottom: 16px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    line-height: 1.7;
}
.ai-notice-warn {
    background: var(--warn-light);
    border-left: 3px solid var(--warn);
    color: var(--warn);
}

/* ===== 表单 ===== */
.ai-form { margin-top: 4px; }

.ai-field-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.ai-field {
    flex: 1 1 100%;
    margin-bottom: 14px;
}
.ai-field-row .ai-field { flex: 1 1 240px; }
.ai-field-row .ai-field-sm { flex: 0 1 160px; }

.ai-field label {
    display: block;
    margin-bottom: 6px;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text);
}

.ai-hint {
    font-weight: 400;
    font-size: 12px;
    color: var(--text-light);
}

.ai-field input[type="text"],
.ai-field select,
.ai-field textarea {
    width: 100%;
    box-sizing: border-box;
    padding: 9px 12px;
    font-size: 14px;
    font-family: inherit;
    color: var(--text);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: border-color .2s, box-shadow .2s, background .2s;
}

.ai-field textarea {
    resize: vertical;
    line-height: 1.7;
}

.ai-field input[type="text"]:focus,
.ai-field select:focus,
.ai-field textarea:focus {
    outline: none;
    background: #fff;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(24, 95, 165, .1);
}

.ai-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 6px;
    /* v1.7.4：只留"生成定制方案"，按钮靠右，状态文字占左侧 */
    justify-content: flex-end;
}

.ai-actions .ai-status {
    flex: 1 1 auto;
    margin-right: auto;
    text-align: left;
}

.ai-actions #ai-submit { flex: 0 0 auto; }

.ai-actions .btn { cursor: pointer; }
.ai-actions .btn[disabled] {
    opacity: .65;
    cursor: not-allowed;
}

/* 生成中：按钮右侧转圈 */
.btn.is-loading::after {
    content: "";
    display: inline-block;
    width: 12px;
    height: 12px;
    margin-left: 8px;
    border: 2px solid rgba(255, 255, 255, .45);
    border-top-color: #fff;
    border-radius: 50%;
    vertical-align: -1px;
    animation: ai-spin .8s linear infinite;
}

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

/* ===== 状态提示 ===== */
.ai-status {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}
.ai-status-loading { color: var(--primary); }
.ai-status-ok      { color: var(--accent); font-weight: 500; }
.ai-status-error   { color: var(--danger); font-weight: 500; }

/* ===== 历史方案 ===== */
.ai-history {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 6px;
    padding-top: 14px;
    border-top: 1px dashed var(--border);
    font-size: 13px;
    color: var(--text-muted);
}

.ai-history select {
    flex: 0 1 320px;
    max-width: 100%;
    padding: 7px 10px;
    font-size: 13px;
    font-family: inherit;
    color: var(--text);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

/* ===== 结果区 ===== */
.ai-result {
    margin-top: 22px;
    padding: 20px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.ai-result-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    padding-bottom: 12px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.ai-result-meta {
    font-size: 12.5px;
    color: var(--text-light);
    line-height: 1.7;
}

.ai-result-tools {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.ai-result-tools .btn { cursor: pointer; }

.ai-section { margin-bottom: 24px; }
.ai-section:last-of-type { margin-bottom: 12px; }

.ai-section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 10px;
    font-size: 15.5px;
    font-weight: 600;
    color: var(--primary);
}

.ai-section-title::before {
    content: "";
    display: inline-block;
    width: 3px;
    height: 15px;
    background: var(--primary);
    border-radius: 2px;
}

.ai-section-body {
    font-size: 14.5px;
    line-height: 1.9;
    color: var(--text);
}

.ai-section-body p { margin: 0 0 10px; }
.ai-section-body p:last-child { margin-bottom: 0; }

.ai-section-body ol,
.ai-section-body ul {
    margin: 8px 0 12px 24px;
    padding: 0;
}

.ai-section-body li {
    margin-bottom: 8px;
    line-height: 1.85;
}

.ai-section-body ol li { list-style: decimal; }
.ai-section-body ul li { list-style: disc; }

.ai-disclaimer {
    margin: 18px 0 0;
    padding-top: 12px;
    border-top: 1px dashed var(--border);
    font-size: 12px;
    line-height: 1.7;
    color: var(--text-light);
}

/* ===== 非认证教师：延伸阅读板块（独立板块 + 左侧红色竖线提醒） ===== */
.ai-extread {
    margin: 32px 0;
    padding: 20px 24px 20px 26px;
    background: #fff;
    border: 1px solid var(--border);
    border-left: 4px solid #c62828;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.ai-extread-kicker {
    display: inline-block;
    margin-bottom: 8px;
    padding: 2px 8px;
    background: #fdecea;
    color: #c62828;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .5px;
}

.ai-extread-title {
    margin: 0 0 8px;
    font-size: 16px;
    font-weight: 600;
    line-height: 1.5;
    color: var(--text);
}

.ai-extread-text {
    margin: 0 0 14px;
    font-size: 13.5px;
    line-height: 1.85;
    color: var(--text-muted);
}

.ai-extread-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.ai-extread-actions .btn { cursor: pointer; }

.ai-extread-hint {
    font-size: 12.5px;
    color: var(--text-light);
}

/* 板块隐藏时强制不占位（部分主题会给 section 设 display） */
.ai-customize[hidden] { display: none !important; }

/* ===== 折叠入口：基于案例，定制教学方案 ===== */
.ai-customize-gate { margin: 24px 0 0; }

.ai-gate-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    padding: 16px 20px;
    background: #fff;
    border: 1px dashed var(--primary);
    border-radius: var(--radius);
    text-align: left;
    cursor: pointer;
    transition: background .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.ai-gate-btn:hover {
    background: var(--primary-light);
    border-style: solid;
    box-shadow: var(--shadow-sm);
}

.ai-gate-icon {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50%;
    font-size: 17px;
    font-weight: 600;
    line-height: 1;
    transition: transform .18s ease;
}

.ai-gate-btn:hover .ai-gate-icon { transform: scale(1.06); }

.ai-gate-main {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}

.ai-gate-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary);
    line-height: 1.4;
}

.ai-gate-sub {
    font-size: 12.5px;
    color: var(--text-light);
    line-height: 1.5;
}

.ai-customize-foot {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 22px;
    padding-top: 16px;
    border-top: 1px dashed var(--border);
}

.ai-ppt-jump-foot {
    font-size: 13px;
    text-decoration: none;
}

/* ===== 移动端 ===== */
@media (max-width: 768px) {
    .ai-customize {
        padding: 18px 16px;
        margin: 24px 0;
    }

    .ai-field-row { gap: 0; }
    .ai-field-row .ai-field,
    .ai-field-row .ai-field-sm { flex: 1 1 100%; }

    .ai-actions { flex-direction: column; align-items: stretch; }
    .ai-actions .btn { width: 100%; }
    .ai-status { text-align: center; }

    .ai-result { padding: 14px; }
    .ai-result-head { flex-direction: column; align-items: flex-start; }
    .ai-result-tools { width: 100%; }
    .ai-result-tools .btn { flex: 1 1 45%; }

    .ai-history { flex-direction: column; align-items: stretch; }
    .ai-history select { flex: 1 1 100%; }

    .ai-extread {
        box-sizing: border-box;
        max-width: 100%;
        padding: 18px 16px 18px 18px;
        margin: 24px 0;
        border-left-width: 4px;
        overflow-wrap: anywhere;
    }
    .ai-extread-text { overflow-wrap: anywhere; }
    .ai-extread-actions { width: 100%; }
    .ai-extread-actions .btn { flex: 1 1 45%; text-align: center; }
    .ai-extread-actions .ai-extread-hint { flex: 1 1 100%; line-height: 1.7; }

    .ai-gate-btn { padding: 14px 16px; gap: 10px; }
    .ai-customize-foot .btn { width: 100%; }
}

/* ============================================================
 * 一键生成 PPT
 * ========================================================== */

.ai-ppt {
    margin-top: 26px;
    padding: 20px 22px 18px;
    background: linear-gradient(180deg, #FCFCFA 0%, #FFFFFF 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

/* v1.7.0：案例材料导出已并入「教学配套材料」方框，此处只剩定制方案卡，去掉外框 */
.ai-ppt--solo {
    margin: 20px 0 0;
    padding: 0;
    background: none;
    border: 0;
    border-radius: 0;
}

.ai-ppt--solo .ai-src-card { margin-bottom: 0; }

/* 醒目提示条：根据默认配套材料，直接生成 PPT */
.ai-ppt-lead {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: -2px 0 16px;
    padding: 13px 18px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary) 72%, var(--primary) 100%);
    color: #fff;
    border-radius: var(--radius-sm);
    box-shadow: 0 3px 12px rgba(0, 0, 0, .10);
}

.ai-ppt-lead-badge {
    flex: 0 0 auto;
    padding: 2px 9px;
    background: rgba(255, 255, 255, .94);
    color: var(--primary);
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .3px;
}

.ai-ppt-lead-text {
    font-size: 15.5px;
    font-weight: 600;
    line-height: 1.45;
    letter-spacing: .3px;
}

.ai-ppt-head { margin-bottom: 16px; }

.ai-ppt-title {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 8px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    flex-wrap: wrap;
}

.ai-ppt-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: var(--radius-sm);
    font-size: 13px;
    line-height: 1;
}

.ai-ppt-tag {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 999px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .2px;
}

.ai-ppt-desc {
    margin: 0;
    font-size: 13px;
    line-height: 1.8;
    color: var(--text-muted);
}

.ai-ppt-desc strong {
    color: var(--text);
    font-weight: 600;
}

.ai-ppt-field-label {
    margin: 16px 0 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
}

/* 内容来源选择 */
.ai-ppt-sources {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* 上下堆叠：案例自带材料在上，"我的定制方案"在下 */
.ai-ppt-sources-stack {
    flex-direction: column;
    gap: 12px;
}

.ai-ppt-sources-stack .ai-src-item { flex: 1 1 auto; }

/* "我的定制方案"方框：取自站点主色的浅蓝底，点击展开填写区 */
.ai-src-custom-box {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    padding: 12px 14px 12px 16px;
    background: linear-gradient(135deg, #EDF4FB 0%, #D9E9F7 100%);
    border: 1px solid #C6DCEF;
    border-left: 4px solid var(--primary);
    border-radius: var(--radius);
    transition: border-color .18s, box-shadow .18s, background .18s;
}

.ai-src-custom-box:hover {
    border-color: var(--primary);
    box-shadow: 0 2px 12px rgba(24, 95, 165, .13);
}

.ai-src-custom-box.is-active {
    background: linear-gradient(135deg, #E2EFFA 0%, #CFE3F5 100%);
    border-color: var(--primary);
}

.ai-src-custom-box.is-disabled {
    opacity: 1;
    cursor: default;
}

.ai-src-custom-pick {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    flex: 1 1 260px;
    cursor: pointer;
    user-select: none;
}

.ai-src-custom-pick input {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
    pointer-events: none;
}

.ai-src-custom-box .ai-src-title { color: var(--primary); }

.ai-src-custom-open {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    flex: 0 0 auto;
    padding: 7px 14px;
    background: #fff;
    color: var(--primary);
    border: 1px solid var(--primary);
    border-radius: var(--radius-sm);
    font-size: 12.5px;
    font-weight: 600;
    line-height: 1.3;
    cursor: pointer;
    transition: background .18s, color .18s, box-shadow .18s;
}

.ai-src-custom-open:hover {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(24, 95, 165, .22);
}

.ai-src-custom-open-arrow {
    font-size: 12px;
    line-height: 1;
}

.ai-src-item {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 9px;
    flex: 1 1 270px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    cursor: pointer;
    transition: border-color .18s, background .18s, box-shadow .18s;
    user-select: none;
}

.ai-src-item input {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
    pointer-events: none;
}

.ai-src-item::before {
    content: "";
    flex: 0 0 auto;
    width: 15px;
    height: 15px;
    margin-top: 1px;
    box-sizing: border-box;
    border: 1.5px solid var(--border);
    border-radius: 50%;
    background: #fff;
    transition: border-color .18s, background .18s, box-shadow .18s;
}

.ai-src-item:hover { border-color: var(--primary); }

.ai-src-item.is-active {
    border-color: var(--primary);
    background: var(--primary-light);
}

.ai-src-item.is-active::before {
    border-color: var(--primary);
    background: var(--primary);
    box-shadow: inset 0 0 0 3px #fff;
}

.ai-src-item.is-disabled {
    opacity: .62;
    background: var(--bg-alt, #fafafa);
    cursor: not-allowed;
}

.ai-src-item.is-disabled:hover { border-color: var(--border); }

.ai-src-body {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.ai-src-title {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text);
}

.ai-src-item.is-active .ai-src-title { color: var(--primary); }

.ai-src-note {
    font-size: 11.5px;
    line-height: 1.55;
    color: var(--text-muted);
}

.ai-ppt-themes {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.ai-theme-item {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 13px 7px 9px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: #fff;
    cursor: pointer;
    transition: border-color .18s, background .18s, box-shadow .18s;
    user-select: none;
}

.ai-theme-item:hover {
    border-color: var(--primary);
    background: var(--bg-alt, #fafafa);
}

.ai-theme-item input {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
    pointer-events: none;
}

.ai-theme-dot {
    display: inline-block;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--swatch);
    box-shadow: inset 0 0 0 2px rgba(255, 255, 255, .55);
    flex: 0 0 auto;
}

.ai-theme-name {
    font-size: 13px;
    color: var(--text-muted);
    white-space: nowrap;
}

.ai-theme-item.is-active {
    border-color: var(--primary);
    background: var(--primary-light);
    box-shadow: 0 0 0 1px var(--primary) inset;
}

.ai-theme-item.is-active .ai-theme-name {
    color: var(--primary);
    font-weight: 600;
}

.ai-theme-item input:focus-visible + .ai-theme-dot {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.ai-ppt-official {
    margin: 14px 0 0;
    padding: 8px 12px;
    background: var(--bg-alt, #fafafa);
    border-left: 3px solid var(--primary-light);
    border-radius: var(--radius-sm);
    font-size: 12.5px;
    line-height: 1.7;
    color: var(--text-muted);
}

.ai-ppt-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 18px;
}

.ai-ppt-actions .btn { cursor: pointer; }

.ai-ppt-actions .btn:disabled {
    opacity: .65;
    cursor: not-allowed;
}

.ai-ppt-source-hint {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    background: var(--bg-alt, #fafafa);
    border: 1px solid var(--border-light);
    border-radius: 999px;
    font-size: 12px;
    color: var(--text-muted);
}

.ai-ppt-source-hint.is-custom {
    background: var(--primary-light);
    border-color: var(--primary-light);
    color: var(--primary);
}

.ai-ppt .ai-status {
    display: block;
    margin-top: 10px;
    font-size: 12.5px;
}

.ai-ppt-note {
    margin: 14px 0 0;
    font-size: 12px;
    line-height: 1.7;
    color: var(--text-light);
}

/* ============================================================
 * v1.6.0 版式：来源卡片式布局
 *   ① 案例自带教学材料卡（蓝，选中态）：导出按钮在右、色调收在卡内
 *   ② 我的定制方案卡（绿，取自首页教师认证横幅 --accent）
 * ========================================================== */

.ai-src-card {
    position: relative;
    margin-bottom: 12px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    transition: border-color .18s, box-shadow .18s, background .18s;
}

.ai-src-card:last-child { margin-bottom: 0; }

.ai-src-card--case {
    border-color: var(--primary);
    background: linear-gradient(180deg, #F7FBFF 0%, #FFFFFF 60%);
    box-shadow: 0 2px 10px rgba(24, 95, 165, .07);
}

.ai-src-card--case.is-dim {
    border-color: var(--border);
    background: #fff;
    box-shadow: none;
}

/* ============================================================
 * v1.7.0 教学配套材料方框底部的"导出 PPT"区
 *   （从独立板块迁入，与上方五段材料同框）
 * ========================================================== */
.ai-case-export {
    margin-top: 22px;
    padding: 16px 18px 14px;
    background: linear-gradient(180deg, #F7FBFF 0%, #FFFFFF 70%);
    border: 1.5px solid var(--primary);
    border-radius: var(--radius);
    box-shadow: 0 2px 10px rgba(24, 95, 165, .07);
}

.ai-case-export-main {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.ai-case-export-pick {
    display: flex;
    flex-direction: column;
    gap: 3px;
    flex: 1 1 260px;
    min-width: 0;
}

.ai-case-export-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14.5px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--primary-dark, #12456F);
}

.ai-case-export-ico {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: var(--radius-sm);
    font-size: 12px;
    line-height: 1;
}

.ai-case-export-note {
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-light);
}

/* 定制表单展开时：导出区弱化 + 标题区可点击（点一下收起表单） */
.ai-case-export.is-dim {
    border-color: var(--border);
    background: #fff;
    box-shadow: none;
}

.ai-case-export.is-dim .ai-case-export-title { color: var(--text-muted); }

.ai-case-export-pick.is-clickable { cursor: pointer; }

.ai-case-export-pick.is-clickable:hover .ai-case-export-title { color: var(--primary); }

.ai-case-export-action {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 0 0 auto;
    margin-left: auto;
}

.ai-case-export .ai-src-themes {
    margin-top: 12px;
    padding: 12px 0 0;
}

.ai-case-export .ai-status { margin-top: 8px; }

.ai-src-main {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 13px 15px;
    flex-wrap: wrap;
}

.ai-src-pick {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    flex: 1 1 300px;
    min-width: 0;
}

.ai-src-pick:not(.ai-src-pick--static) { cursor: pointer; }

.ai-src-radio {
    position: relative;
    flex: 0 0 auto;
    width: 15px;
    height: 15px;
    margin-top: 3px;
    box-sizing: border-box;
    border: 1.5px solid #B9B6AB;
    border-radius: 50%;
    background: #fff;
}

.ai-src-card--case .ai-src-radio { border-color: var(--primary); }

.ai-src-card--case .ai-src-radio::after {
    content: "";
    position: absolute;
    inset: 2.5px;
    border-radius: 50%;
    background: var(--primary);
}

.ai-src-card--custom .ai-src-radio { border-color: #7FC0A4; }

.ai-src-card--custom.is-ready .ai-src-radio::after {
    content: "";
    position: absolute;
    inset: 2.5px;
    border-radius: 50%;
    background: var(--accent);
}

.ai-src-body {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}

.ai-src-title {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text);
}

.ai-src-card--case .ai-src-title { color: var(--primary-dark); }
.ai-src-card--custom .ai-src-title { color: #0B5344; }

.ai-src-note {
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-light);
}

.ai-src-card--custom .ai-src-note { color: #4C7A6A; }

.ai-src-tip {
    padding: 2px 8px;
    background: var(--warn-light);
    color: var(--warn);
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
}

.ai-src-tip[hidden] { display: none; }

.ai-src-action {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 0 0 auto;
    margin-left: auto;
    padding-top: 1px;
}

.ai-src-meta {
    font-size: 11.5px;
    color: var(--accent);
    white-space: nowrap;
}

/* 主导出按钮 */
.ai-btn-ppt {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 18px;
    background: var(--primary);
    color: #fff;
    border: 0;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 13.5px;
    font-weight: 600;
    line-height: 1.2;
    white-space: nowrap;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(24, 95, 165, .28);
    transition: background .18s, box-shadow .18s, opacity .18s;
}

.ai-btn-ppt:hover {
    background: var(--primary-dark);
    box-shadow: 0 3px 10px rgba(24, 95, 165, .3);
}

.ai-btn-ppt:disabled { opacity: .7; cursor: default; }

.ai-btn-ppt-ico { font-size: 12px; opacity: .85; }

.ai-btn-ppt--accent {
    background: var(--accent);
    box-shadow: 0 1px 3px rgba(15, 110, 86, .3);
}

.ai-btn-ppt--accent:hover {
    background: #0B5344;
    box-shadow: 0 3px 10px rgba(15, 110, 86, .32);
}

/* 卡片内嵌色调条 */
.ai-src-themes {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 15px 13px;
    border-top: 1px dashed #D8E6F3;
    flex-wrap: wrap;
}

.ai-src-themes .ai-ppt-themes { gap: 7px; }
.ai-src-themes .ai-theme-item { padding: 5px 11px 5px 7px; }
.ai-src-themes .ai-theme-dot { width: 12px; height: 12px; }
.ai-src-themes .ai-theme-name { font-size: 12px; }

.ai-themes-label {
    flex: 0 0 auto;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--text-muted);
    white-space: nowrap;
}

/* 我的定制方案卡（绿） */
.ai-src-card--custom {
    background: linear-gradient(135deg, #EAF7F1 0%, #D5EEE2 100%);
    border-color: #B7DCCB;
    border-left: 4px solid var(--accent);
}

.ai-src-card--custom:hover {
    border-color: var(--accent);
    box-shadow: 0 2px 12px rgba(15, 110, 86, .15);
}

.ai-src-open {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 15px;
    background: #fff;
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 12.5px;
    font-weight: 600;
    line-height: 1.3;
    white-space: nowrap;
    cursor: pointer;
    transition: background .18s, color .18s, box-shadow .18s;
}

.ai-src-open:hover {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(15, 110, 86, .22);
}

/* 定制结果内嵌的导出条 */
.ai-ppt-export {
    margin-top: 16px;
    padding: 14px 16px 12px;
    background: #EFFAF4;
    border: 1px solid #B7DCCB;
    border-radius: var(--radius);
}

.ai-ppt-export-head {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 11px;
    flex-wrap: wrap;
}

.ai-ppt-export-title {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13.5px;
    font-weight: 700;
    color: #0B5344;
}

.ai-ppt-export-ico {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: var(--accent);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-style: normal;
    line-height: 1;
}

.ai-ppt-export-src {
    font-size: 12px;
    color: #4C7A6A;
}

.ai-ppt-export-body {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.ai-ppt-export-body .ai-ppt-themes { gap: 7px; flex: 1 1 auto; }
.ai-ppt-export-body .ai-theme-item { padding: 5px 11px 5px 7px; }
.ai-ppt-export-body .ai-theme-dot { width: 12px; height: 12px; }
.ai-ppt-export-body .ai-theme-name { font-size: 12px; }
.ai-ppt-export-body .ai-btn-ppt { margin-left: auto; }

.ai-ppt-export-body .ai-theme-item.is-active {
    border-color: var(--accent);
    background: var(--accent-light);
    box-shadow: 0 0 0 1px var(--accent) inset;
}

.ai-ppt-export-body .ai-theme-item.is-active .ai-theme-name { color: var(--accent); }

.ai-ppt-export .ai-ppt-export-status { margin-top: 8px; font-size: 12.5px; }
.ai-ppt-export .ai-ppt-export-status:empty { display: none; }

/* 定制表单框同步为绿色（与定制方案卡同色系） */
.ai-customize { border-color: var(--accent); }

.ai-customize .ai-badge {
    background: var(--accent-light);
    color: var(--accent);
}

.ai-customize .ai-actions .btn-primary {
    background: var(--accent);
    border-color: var(--accent);
}

.ai-customize .ai-actions .btn-primary:hover {
    background: #0B5344;
    border-color: #0B5344;
}

@media (max-width: 768px) {
    .ai-ppt { padding: 16px 14px 14px; }
    .ai-ppt-lead { padding: 12px 14px; gap: 8px; }
    .ai-ppt-lead-text { font-size: 14.5px; }
    .ai-ppt-sources { flex-direction: column; }
    .ai-src-item { flex: 1 1 auto; }
    .ai-src-custom-box { align-items: flex-start; }
    .ai-src-custom-open { width: 100%; justify-content: center; }
    .ai-ppt-themes { gap: 8px; }
    .ai-theme-item { padding: 6px 11px 6px 8px; }
    .ai-ppt-actions { flex-direction: column; align-items: stretch; }
    .ai-ppt-actions .btn { width: 100%; }
    .ai-ppt-source-hint { justify-content: center; }

    /* v1.6.0 卡片式布局 */
    .ai-src-main { padding: 12px 13px; }
    .ai-src-pick { flex: 1 1 100%; }
    .ai-src-action { margin-left: 0; width: 100%; justify-content: space-between; }
    .ai-src-action .ai-btn-ppt { flex: 1 1 auto; }
    .ai-src-themes { gap: 8px; padding: 10px 13px 12px; }
    .ai-ppt-export { padding: 12px 13px 10px; }
    .ai-ppt-export-body .ai-btn-ppt { margin-left: 0; width: 100%; }

    /* v1.7.0 教学材料框内导出区 */
    .ai-case-export { padding: 13px 13px 12px; margin-top: 18px; }
    .ai-case-export-main { gap: 10px; }
    .ai-case-export-pick { flex: 1 1 100%; }
    .ai-case-export-action { margin-left: 0; width: 100%; justify-content: space-between; }
    .ai-case-export-action .ai-btn-ppt { flex: 1 1 auto; }
    .ai-case-export .ai-src-themes { padding: 12px 0 0; }
    .ai-ppt--solo { margin-top: 16px; }
}