/* ====== 基础变量与重置 ====== */
:root {
    --primary: #4f6ef7;
    --primary-dark: #3b54d4;
    --success: #26ab5f;
    --warning: #f0a030;
    --danger: #e5534b;
    --bg: #f5f7fb;
    --card-bg: #ffffff;
    --text: #2c3e50;
    --text-secondary: #6b7d95;
    --border: #e1e8f0;
    --radius: 10px;
    --shadow: 0 2px 12px rgba(0,0,0,0.06);
    --transition: 0.2s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* ====== 头部 ====== */
.app-header {
    background: linear-gradient(135deg, #4f6ef7 0%, #764ba2 100%);
    color: white;
    padding: 24px 32px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(79, 110, 247, 0.25);
}

.app-header h1 { font-size: 26px; font-weight: 700; }
.subtitle { margin-top: 6px; opacity: 0.9; font-size: 14px; }

/* ====== 主布局 ====== */
.app-main {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 24px;
    max-width: 1400px;
    margin: 24px auto;
    padding: 0 24px;
    min-height: calc(100vh - 140px);
}

/* ====== 侧边栏 ====== */
.sidebar { display: flex; flex-direction: column; gap: 20px; }

.panel {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.panel h2 { font-size: 16px; margin-bottom: 16px; color: var(--text); }

/* ====== 上传区域 ====== */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 28px 16px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}
.upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--primary);
    background: rgba(79, 110, 247, 0.04);
}
.upload-icon { font-size: 40px; margin-bottom: 10px; }
.upload-hint { color: var(--text-secondary); font-size: 12px; margin-top: 6px; }
.file-info {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
    padding: 10px 14px;
    background: #f0f9f4;
    border-radius: 8px;
    font-size: 13px;
}
.file-name { flex: 1; font-weight: 600; word-break: break-all; }
.file-size { color: var(--text-secondary); white-space: nowrap; }
.hidden { display: none !important; }

/* ====== 按钮 ====== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    margin-top: 8px;
}
.btn-primary {
    background: var(--primary);
    color: white;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { background: #b0bec5; cursor: not-allowed; }
.btn-outline {
    background: white;
    color: var(--primary);
    border: 1.5px solid var(--primary);
}
.btn-outline:hover { background: rgba(79, 110, 247, 0.06); }
.btn-outline:disabled { color: #b0bec5; border-color: #b0bec5; cursor: not-allowed; }
.btn-danger { background: var(--danger); color: white; border: none; }
.btn-small { padding: 4px 10px; font-size: 12px; width: auto; }

/* ====== 模型配置区 ====== */
.config-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    font-size: 14px;
}
#aiConfig { margin-top: 10px; }
.model-section {
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 12px;
}
.model-title {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.model-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 700;
    color: white;
}
.model-badge.ds { background: #4f6ef7; }
.model-badge.qw { background: #8b5cf6; }
#aiConfig label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
#aiConfig input {
    display: block;
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 13px;
    margin-top: 3px;
}
#aiConfig input:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 110, 247, 0.12);
}

.export-buttons { display: flex; flex-direction: column; gap: 6px; }
.export-buttons .btn { margin-top: 0; }

/* ====== 内容区 ====== */
.content { display: flex; flex-direction: column; gap: 20px; }

.progress-bar {
    background: var(--card-bg);
    border-radius: 20px;
    height: 40px;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
}
.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #4f6ef7, #764ba2);
    border-radius: 20px;
    transition: width 0.4s ease;
    width: 0%;
}
.progress-text {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-size: 13px;
    color: var(--text);
    font-weight: 600;
}

/* ====== 统计卡片 ====== */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 14px;
}
.summary-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 18px;
    border: 1px solid var(--border);
    text-align: center;
    box-shadow: var(--shadow);
}
.summary-card .num { font-size: 32px; font-weight: 700; color: var(--primary); }
.summary-card .label { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

/* ====== 步骤展示 ====== */
.steps-container { display: flex; flex-direction: column; gap: 12px; }
.step-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 16px 20px;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
}
.step-card h3 { font-size: 15px; margin-bottom: 6px; }
.step-card p { font-size: 13px; color: var(--text-secondary); }

/* ====== 题目卡片 ====== */
.question-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    margin-bottom: 14px;
}
.q-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}
.q-title { font-size: 16px; font-weight: 700; }
.q-badges { display: flex; gap: 6px; flex-wrap: wrap; }
.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}
.badge-type { background: #eef2ff; color: #4f6ef7; }
.badge-difficulty { background: #fff7ed; color: #ea580c; }
.badge-knowledge { background: #f0fdf4; color: #16a34a; }

.q-stem { margin-bottom: 12px; line-height: 1.8; }
/* #### 这类小标题: 独占一行(块级,不靠 <br>)、加粗蓝字、上下留白形成层次 */
.q-head { display: block; font-weight: 600; color: #2b5797; margin: 8px 0 2px; }
/* 答案/解析框正文也用宽松行距, 与题干一致, 排版更舒展 */
.q-answer-box, .q-analysis-box { line-height: 1.8; }

.q-options { margin: 0 0 12px 16px; }
.q-options li { padding: 3px 0; font-size: 14px; list-style: none; }

.q-tags { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.q-tag-item { font-size: 13px; }
.q-tag-item .tag-label { color: var(--text-secondary); }
.q-tag-item .tag-value { font-weight: 600; }

.q-answer-box {
    margin-top: 12px;
    padding: 12px 16px;
    background: #f0fdf4;
    border-radius: 8px;
    font-size: 14px;
}
.q-analysis-box {
    margin-top: 8px;
    padding: 12px 16px;
    background: #fefce8;
    border-radius: 8px;
    font-size: 14px;
}
.q-steps-box {
    margin-top: 8px;
    padding: 12px 16px;
    background: #f8fafc;
    border-radius: 8px;
    font-size: 13px;
}
.q-steps-box ol { margin-left: 18px; }

.q-actions { margin-top: 12px; display: flex; gap: 8px; justify-content: flex-end; }

/* ====== 空状态 ====== */
.empty-state {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 60px 40px;
    text-align: center;
    border: 2px dashed var(--border);
}
.empty-icon { font-size: 56px; margin-bottom: 16px; }
.empty-state h3 { font-size: 20px; margin-bottom: 8px; }
.empty-state p { color: var(--text-secondary); font-size: 14px; }
.workflow-preview {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-top: 28px;
    flex-wrap: wrap;
}
.step-item {
    padding: 10px 18px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
}
.step-arrow { color: var(--text-secondary); font-size: 18px; }

/* ====== 弹窗 ====== */
.edit-dialog {
    border: none;
    border-radius: var(--radius);
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    padding: 0;
    min-width: 500px;
    max-width: 700px;
}
.edit-dialog::backdrop { background: rgba(0,0,0,0.4); }
.dialog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}
.dialog-body { padding: 20px; max-height: 60vh; overflow-y: auto; }
.dialog-body label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 4px;
    margin-top: 12px;
}
.dialog-body input, .dialog-body textarea, .dialog-body select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 13px;
    font-family: inherit;
}
.dialog-body textarea { min-height: 80px; resize: both; }
.dialog-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}
.dialog-footer .btn { width: auto; margin-top: 0; }

/* ====== 页面预览 ====== */
.page-viewer { max-height: 70vh; overflow-y: auto; }
.page-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.page-card {
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: #fafafa;
}
.page-label {
    padding: 8px 14px;
    font-size: 13px;
    font-weight: 600;
    background: #f0f4ff;
    border-bottom: 1px solid var(--border);
}
.page-card img { width: 100%; cursor: pointer; }
.page-card img:hover { opacity: 0.9; }
.img-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
}
.img-card {
    border: 2px solid var(--border);
    border-radius: 8px;
    padding: 8px;
    text-align: center;
    background: white;
}
.img-card:hover { border-color: var(--primary); }
.img-label {
    font-size: 11px; color: var(--text-secondary);
    margin-bottom: 6px; word-break: break-all;
}

/* 图片管理面板: 跟随页面下拉(sticky), 滚到哪跟到哪, 方便随时复制图片 */
#imagePanel {
    position: sticky;
    top: 12px;
    z-index: 10;
}
/* sticky 跟随时, 图片列表按视口高度自适应, 图多也好翻 */
#imagePanel .img-gallery-sidebar {
    max-height: max(320px, calc(100vh - 220px));
}

/* ====== 侧边栏图片管理 ====== */
.img-gallery-sidebar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    max-height: 400px;
    overflow-y: auto;
}
.img-card-sidebar {
    border: 2px solid var(--border);
    border-radius: 6px;
    padding: 4px;
    cursor: pointer;
    text-align: center;
    background: white;
    transition: var(--transition);
}
.img-card-sidebar:hover {
    border-color: var(--primary);
    box-shadow: 0 2px 8px rgba(79,110,247,0.2);
}
.img-card-sidebar img {
    max-width: 100%;
    max-height: 60px;
    object-fit: contain;
}
.img-meta {
    font-size: 10px;
    color: var(--text-secondary);
    margin-top: 2px;
}
.img-url-preview {
    font-size: 9px;
    color: #aaa;
    word-break: break-all;
    margin-top: 2px;
}

/* ====== Toast ====== */
#toast {
    box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

/* ====== 响应式 ====== */
@media (max-width: 900px) {
    .app-main { grid-template-columns: 1fr; }
    .q-tags { grid-template-columns: 1fr; }
}

/* ====== 编辑弹窗：图片三类管理 ====== */
.img-edit-section {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px dashed var(--border);
}
.img-edit-section h4 { margin: 4px 0 8px; font-size: 14px; }
.img-edit-head {
    font-size: 12px; font-weight: 600; color: var(--text-secondary);
    margin: 8px 0 4px;
}
.img-row {
    display: flex; align-items: center; gap: 6px;
    margin-bottom: 6px; flex-wrap: nowrap;
}
.img-thumb {
    width: 44px; height: 44px; object-fit: contain;
    border: 1px solid var(--border); border-radius: 4px; background: #fafafa;
    flex-shrink: 0;
}
/* 覆盖 .dialog-body input/select 的 width:100%，避免把删除按钮挤出视区 */
.dialog-body .img-row .img-url {
    flex: 1 1 auto; min-width: 60px; width: auto; padding: 5px 8px;
    border: 1px solid var(--border); border-radius: 5px; font-size: 12px; margin-top: 0;
}
.dialog-body .img-row .img-type, .dialog-body .img-row .img-opt {
    width: auto; flex: 0 0 auto; padding: 5px 4px;
    border: 1px solid var(--border); border-radius: 5px; font-size: 12px; margin-top: 0;
}
.img-row .btn-danger { flex: 0 0 auto; padding: 4px 9px; }
.img-btn-row { display: flex; gap: 6px; margin: 2px 0 6px; }
.img-btn-row .btn-small { flex: 1; }
.badge-warn {
    background: #ffe9b0; color: #8a6d00; border-radius: 8px;
    padding: 1px 7px; font-size: 10px; white-space: nowrap; flex: 0 0 auto;
}
/* 题干/解析里的表格(MinerU 表格、折线图数据等) */
.q-table {
    border-collapse: collapse; margin: 8px 0; font-size: 13px;
    display: block; overflow-x: auto; max-width: 100%;
}
.q-table td, .q-table th {
    border: 1px solid #ccc; padding: 4px 10px; text-align: center; white-space: nowrap;
}
.q-table th { background: #f2f5fa; font-weight: 600; }
.q-table tr:nth-child(even) td { background: #fafbfc; }
.q-rich-details {
    margin: 8px 0; padding: 6px 10px; border: 1px dashed #cbd5e1;
    border-radius: 6px; background: #fafcff;
}
.q-rich-details summary { cursor: pointer; color: #555; font-size: 12px; user-select: none; }

/* 编辑弹窗内的表格编辑器 */
.tbl-edit-section { margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--border); }
.tbl-edit-section h4 { margin: 0 0 8px; font-size: 13px; }
.tbl-block { margin-bottom: 14px; padding: 8px; border: 1px solid var(--border); border-radius: 6px; overflow-x: auto; }
.tbl-head { display: flex; align-items: center; gap: 6px; margin-bottom: 6px; }
.tbl-head b { font-size: 12px; margin-right: auto; }
.tbl-edit { border-collapse: collapse; }
.tbl-edit td { border: 1px solid var(--border); padding: 2px; }
.tbl-edit .tbl-ctl td { border: none; padding: 1px; text-align: center; }
.dialog-body .tbl-edit .tcell { width: auto; min-width: 64px; padding: 4px 6px; font-size: 12px; margin-top: 0; border: 1px solid transparent; }
.dialog-body .tbl-edit .tcell[data-h="1"] { background: #f2f5fa; font-weight: 600; }
.btn-mini { padding: 1px 5px; font-size: 10px; color: #c0392b; background: #fff; border: 1px solid #f0c0c0; border-radius: 4px; cursor: pointer; }
.btn-mini:hover { background: #fde8e8; }

/* ====== AI 复核题目 ====== */
.review-bar { margin-bottom: 10px; }
.review-check { display: flex; align-items: center; gap: 5px; font-size: 12px; color: var(--text-secondary); margin-top: 7px; cursor: pointer; }
.review-panel { margin: 0 0 16px; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; background: #fff; box-shadow: 0 1px 5px rgba(0,0,0,.05); }
.review-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: 12px 16px; background: #f8fafc; border-bottom: 1px solid var(--border); font-size: 14px; font-weight: 600; color: #1f2937; }
.review-head.ok { background: #f0fdf4; color: #16a34a; border-bottom: none; }
.rv-cnt { font-size: 12px; font-weight: 600; padding: 2px 9px; border-radius: 10px; }
.rv-cnt.err { background: #fef2f2; color: #dc2626; }
.rv-cnt.wrn { background: #fffbeb; color: #d97706; }
.rv-cnt.inf { background: #f1f5f9; color: #64748b; }
.review-issue { display: flex; align-items: center; gap: 10px; padding: 9px 16px; border-bottom: 1px solid #f1f5f9; font-size: 13px; border-left: 4px solid transparent; }
.review-issue:last-child { border-bottom: none; }
.review-issue.error { border-left-color: #dc2626; background: #fffafa; }
.review-issue.warn { border-left-color: #f59e0b; background: #fffdf7; }
.review-issue.info { border-left-color: #94a3b8; }
.rv-q { font-weight: 600; white-space: nowrap; color: #1f2937; }
.rv-cat { font-size: 12px; color: var(--text-secondary); white-space: nowrap; }
.rv-msg { flex: 1; color: #444; line-height: 1.5; }
.review-head .btn-mini { margin-left: auto; }
.review-panel .btn-mini { color: var(--primary); border-color: #c5d0f0; white-space: nowrap; }
.review-panel .btn-mini:hover { background: #eef2fe; }
/* 跳转到题卡时的高亮闪烁 */
@keyframes qFlash { 0%,100% { box-shadow: 0 0 0 0 rgba(79,110,247,0); } 30% { box-shadow: 0 0 0 4px rgba(79,110,247,.5); } }
.q-card-flash { animation: qFlash 1s ease-in-out 2; border-color: var(--primary) !important; }

/* ====== 登录遮罩 ====== */
.login-overlay { position: fixed; inset: 0; z-index: 9999; display: flex; align-items: center; justify-content: center; background: rgba(15,23,42,.55); backdrop-filter: blur(3px); }
.login-overlay.hidden { display: none; }
.login-card { background: #fff; padding: 32px 28px; border-radius: 14px; box-shadow: 0 10px 40px rgba(0,0,0,.25); width: 320px; max-width: 90vw; text-align: center; }
.login-card h2 { margin: 0 0 4px; font-size: 22px; }
.login-tip { color: #6b7d95; font-size: 13px; margin: 0 0 18px; }
.login-card input { width: 100%; box-sizing: border-box; padding: 11px 13px; margin-bottom: 12px; border: 1px solid #d8e0ec; border-radius: 8px; font-size: 14px; }
.login-card input:focus { outline: none; border-color: var(--primary); }
.login-card .btn { width: 100%; padding: 11px; font-size: 15px; margin-top: 4px; }
.login-err { color: #dc2626; font-size: 13px; min-height: 18px; margin: 10px 0 0; }

/* 画线部分(阅读题(A)(B)…处画线短语，OCR丢失的下划线在前端补上) */
.q-underline { text-decoration: underline; text-decoration-thickness: 1.5px; text-underline-offset: 3px; }

/* 着重号(加点): 中文习惯点在字的下方 */
.emph-dot { text-emphasis: filled dot; -webkit-text-emphasis: filled dot;
  text-emphasis-position: under; -webkit-text-emphasis-position: under; }
/* 编辑弹窗工具栏(着重号/手动换行) */
.edit-toolbar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding: 8px 20px; border-bottom: 1px solid #eef2f7; background: #fafbfd; }
.edit-toolbar-hint { font-size: 12px; color: #94a3b8; }

/* 题组(大题)清晰布局 v1 */
.q-group .q-passage{background:#f6f8fa;border:1px solid #e1e4e8;border-left:4px solid #4a90d9;border-radius:6px;padding:12px 14px;margin:8px 0 12px;line-height:1.9}
.q-group-tags{margin:8px 0;font-size:12px}
.q-subs{margin-top:10px;display:flex;flex-direction:column;gap:12px}
.q-sub{border:1px solid #e1e4e8;border-radius:8px;padding:12px 14px;background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.05)}
.q-sub-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:8px;padding-bottom:6px;border-bottom:1px dashed #e1e4e8}
.q-sub-num{font-weight:700;color:#fff;background:#4a90d9;border-radius:12px;padding:2px 11px;font-size:13px}
.q-sub .q-stem{margin:4px 0;line-height:1.8}
.q-sub .q-options{margin:6px 0;padding-left:18px}
.q-sub .q-answer-box,.q-sub .q-analysis-box{margin:6px 0;padding:6px 10px;background:#fafbfc;border-radius:5px}
/* 图片加工按钮: 悬停图片右上角浮出「白底黑字」 */
.img-wrap{position:relative;display:inline-block;line-height:0}
.img-proc-btn{position:absolute;top:8px;right:8px;font-size:11px;line-height:1.3;padding:2px 6px;border:1px solid #bbb;border-radius:5px;background:rgba(255,255,255,.92);color:#333;cursor:pointer;opacity:0;transition:opacity .15s;z-index:2}
.img-wrap:hover .img-proc-btn,.img-card-sidebar:hover .img-proc-btn{opacity:1}
.img-card-sidebar .img-proc-btn{top:4px;right:4px;font-size:10px;padding:1px 4px}