/* ============================================================
   教学动画 · 交互式课堂
   复用「数道·万象」设计系统的增量样式
   （原 style.css / app.js 与 7 个原有模块一律未改动）
   ============================================================ */

/* ---- 教学区块整体 ---- */
.jx-section .section-header {
    margin-bottom: 48px;
}

/* ---- 教学区块：画廊目录 ---- */
.jx-gallery {
    max-width: var(--max-w);
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
    margin-bottom: 28px;
}

.jx-gallery-card {
    display: block;
    text-decoration: none;
    color: inherit;
    padding: 22px 22px 18px;
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.07);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.jx-gallery-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--gold), var(--vermilion));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s;
}

.jx-gallery-card:hover {
    transform: translateY(-5px);
    border-color: rgba(212, 165, 116, 0.45);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
    background: rgba(255, 255, 255, 0.05);
}

.jx-gallery-card:hover::before {
    transform: scaleX(1);
}

.jx-gallery-icon {
    position: absolute;
    top: 14px;
    right: 16px;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(212, 165, 116, 0.1);
    color: var(--gold);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    border: 1px solid rgba(212, 165, 116, 0.18);
}

.jx-gallery-num {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--gold);
    margin-bottom: 6px;
}

.jx-gallery-title {
    font-family: var(--font-serif);
    font-size: 1.08rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 6px;
    letter-spacing: 0.04em;
    padding-right: 42px;
}

.jx-gallery-field {
    font-size: 0.74rem;
    color: var(--vermilion-light);
    font-weight: 500;
    margin-bottom: 10px;
    letter-spacing: 0.03em;
}

.jx-gallery-field .jx-new {
    color: var(--jade);
    font-weight: 700;
}

.jx-gallery-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 10px;
}

.jx-gallery-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
    font-size: 0.72rem;
    color: var(--text-dim);
}

.jx-difficulty {
    display: inline-flex;
    gap: 4px;
}

.jx-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);
}

.jx-dot.active {
    background: var(--gold);
    box-shadow: 0 0 6px rgba(212, 165, 116, 0.45);
}

.jx-time {
    white-space: nowrap;
}

.jx-gallery-desc {
    font-size: 0.8rem;
    color: var(--text-dim);
    line-height: 1.65;
    margin-bottom: 12px;
}

.jx-gallery-arrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--gold);
    opacity: 0.7;
    transition: all 0.3s;
}

.jx-gallery-card:hover .jx-gallery-arrow {
    color: var(--vermilion-light);
    transform: translateX(6px);
    opacity: 1;
}

/* ---- 分页 ---- */
.jx-pagination {
    max-width: var(--max-w);
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-bottom: 72px;
    flex-wrap: wrap;
}

.jx-page-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.25s;
}

.jx-page-btn:hover {
    border-color: var(--gold);
    color: var(--gold);
    background: rgba(212, 165, 116, 0.08);
}

.jx-page-btn.active {
    border-color: var(--gold);
    color: var(--ink);
    background: var(--gold);
    font-weight: 700;
}

/* ---- 模块容器（按分组竖向排列） ---- */
.jx-grid {
    max-width: var(--max-w);
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 58px;
}

/* ---- 单个教学模块卡片 ---- */
.jx-card {
    background: var(--ink-mid);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius);
    padding: 26px 26px 22px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    scroll-margin-top: 90px;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.jx-card:hover {
    border-color: rgba(212, 165, 116, 0.15);
}

.jx-card-head {
    display: flex;
    align-items: center;
    gap: 14px;
}

.jx-card-num {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 900;
    color: var(--gold);
    line-height: 1;
}

.jx-card-num.new {
    color: var(--jade);
}

.jx-card-titles {
    flex: 1;
    min-width: 0;
}

.jx-card-title {
    font-family: var(--font-serif);
    font-size: 1.12rem;
    font-weight: 600;
    color: var(--text-light);
    letter-spacing: 0.04em;
    line-height: 1.3;
    margin: 0;
}

.jx-card-tags {
    font-size: 0.72rem;
    color: var(--text-dim);
    letter-spacing: 0.04em;
    margin: 2px 0 0;
}

.jx-badge {
    font-size: 0.68rem;
    padding: 3px 11px;
    border-radius: 20px;
    border: 1px solid var(--gold-dim);
    color: var(--gold-dim);
    white-space: nowrap;
    flex-shrink: 0;
}

.jx-badge-new {
    border-color: var(--jade);
    color: var(--jade);
    background: rgba(92, 138, 138, 0.08);
}

/* 卡片元信息行 */
.jx-card-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: -4px;
}

.jx-card-field {
    color: var(--vermilion-light);
    font-weight: 500;
}

.jx-card-difficulty {
    display: inline-flex;
    gap: 4px;
}

.jx-card-time {
    margin-left: auto;
}

/* 题面 */
.jx-problem {
    font-size: 0.9rem;
    line-height: 1.85;
    color: var(--text-light);
    background: rgba(255, 255, 255, 0.03);
    border-left: 2px solid var(--gold);
    padding: 12px 16px;
    border-radius: 0 8px 8px 0;
    margin: 0;
}

.jx-problem .formula {
    font-family: var(--font-mono);
    color: var(--gold-bright);
    font-weight: 600;
}

.jx-problem .mk {
    color: var(--vermilion-light);
    font-weight: 600;
}

/* 分步预览 */
.jx-steps-preview {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    padding: 12px 14px;
}

.jx-steps-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.jx-step-item {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    font-size: 0.82rem;
    line-height: 1.6;
    color: var(--text-dim);
}

.jx-step-n {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    line-height: 20px;
    text-align: center;
    border-radius: 50%;
    background: rgba(212, 165, 116, 0.12);
    color: var(--gold);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    margin-top: 1px;
}

/* 画布容器 */
.jx-canvas-wrap {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--ink-light);
    height: 340px;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.jx-canvas-wrap canvas {
    display: block;
    width: 100%;
    height: 100%;
}

/* 控件行 */
.jx-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 22px;
    align-items: flex-end;
}

.jx-control {
    display: flex;
    flex-direction: column;
    gap: 7px;
    min-width: 150px;
    flex: 1;
}

.jx-control label {
    font-size: 0.76rem;
    letter-spacing: 0.06em;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-dim);
}

.jx-control label span {
    font-family: var(--font-mono);
    color: var(--gold);
    font-weight: 600;
}

.jx-control input[type="text"],
.jx-control input[type="number"] {
    padding: 9px 12px;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-light);
    background: var(--ink-light);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    outline: none;
    transition: all 0.3s;
}

.jx-control input[type="text"]:focus,
.jx-control input[type="number"]:focus {
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(212, 165, 116, 0.12);
}

/* 卡片内所有数字/文本输入框统一深色样式（兼容 .control-group 包裹） */
.jx-card input[type="number"],
.jx-card input[type="text"] {
    padding: 9px 12px;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-light);
    background: var(--ink-light);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    outline: none;
    transition: all 0.3s;
}

.jx-card input[type="number"]:focus,
.jx-card input[type="text"]:focus {
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(212, 165, 116, 0.12);
}

.jx-btn-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* 选项卡（自有关注类，避免与 app.js 的 .proof-btn 全局选择器冲突） */
.jx-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.jx-tab {
    padding: 8px 14px;
    border: 1px solid var(--ink-light);
    background: transparent;
    color: var(--text-dim);
    border-radius: var(--radius);
    cursor: none;
    font-size: 0.8rem;
    transition: all 0.3s;
    font-family: var(--font-serif);
}

.jx-tab.active {
    border-color: var(--gold);
    color: var(--gold);
    background: rgba(212, 165, 116, 0.1);
}

/* 答案 / 反馈区 */
.jx-answer {
    font-size: 0.88rem;
    line-height: 1.8;
    color: var(--text-light);
    background: rgba(212, 165, 116, 0.06);
    border: 1px solid rgba(212, 165, 116, 0.2);
    border-radius: 8px;
    padding: 14px 16px;
}

.jx-answer.ok {
    border-color: var(--jade);
    background: rgba(92, 138, 138, 0.08);
}

.jx-answer.warn {
    border-color: var(--vermilion-light);
    background: rgba(231, 76, 60, 0.07);
}

.jx-answer .hl {
    color: var(--gold-bright);
    font-family: var(--font-mono);
    font-weight: 600;
}

.jx-answer .ok {
    color: var(--jade);
    font-weight: 600;
}

.jx-answer .err {
    color: var(--vermilion-light);
    font-weight: 600;
}

.jx-answer .step-line {
    display: block;
    font-family: var(--font-mono);
    color: var(--text-light);
    padding: 3px 0;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.06);
}

.jx-answer .step-line:last-child {
    border-bottom: none;
}

/* 分步演示 */
.jx-steps {
    font-size: 0.86rem;
    line-height: 1.8;
    color: var(--text-dim);
}

.jx-step {
    padding: 8px 12px;
    border-radius: 8px;
    margin-bottom: 6px;
    border: 1px solid transparent;
    transition: all 0.3s;
    opacity: 0.4;
}

.jx-step.active {
    opacity: 1;
    background: rgba(212, 165, 116, 0.08);
    border-color: rgba(212, 165, 116, 0.25);
    color: var(--text-light);
}

.jx-step.done {
    opacity: 0.85;
}

.jx-step .n {
    display: inline-block;
    width: 22px;
    height: 22px;
    line-height: 22px;
    text-align: center;
    border-radius: 50%;
    background: var(--ink-light);
    color: var(--gold);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    margin-right: 8px;
}

.jx-hint {
    font-size: 0.78rem;
    color: var(--gold-dim);
    line-height: 1.6;
    font-style: italic;
}

/* 小徽标 / 标签组 */
.jx-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.jx-tag {
    font-size: 0.7rem;
    padding: 3px 10px;
    border-radius: 12px;
    background: rgba(212, 165, 116, 0.1);
    color: var(--gold-dim);
    border: 1px solid rgba(212, 165, 116, 0.18);
}

/* 卡片底部按钮 */
.jx-card-foot {
    display: flex;
    justify-content: flex-end;
    margin-top: 2px;
}

.jx-open-btn {
    font-size: 0.8rem;
    padding: 9px 18px;
}

/* ============================================================
   xsyy 风格卡片（指南页教学区）
   ============================================================ */
.jx-card-thumb {
    flex: 0 0 auto;
    width: 280px;
    height: 390px;
    background: #fff;
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 16px;
    padding: 0;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
}

.jx-card-thumb:hover {
    transform: translateY(-6px);
    border-color: rgba(212, 165, 116, 0.45);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.12);
}

/* 卡片顶部背景艺术区 */
.jx-thumb-art {
    position: relative;
    height: 158px;
    width: 100%;
    overflow: hidden;
    flex-shrink: 0;
    background: linear-gradient(180deg, #f7f3ed 0%, #ede6db 100%);
}

.jx-thumb-art::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 40px;
    background: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.85));
    pointer-events: none;
}

.jx-thumb-art svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

.jx-thumb-body {
    padding: 18px 18px 16px;
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
    background: #fff;
}

.jx-thumb-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
}

.jx-thumb-title {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-dark);
    letter-spacing: 0.03em;
    line-height: 1.35;
    margin: 0;
    flex: 1;
    min-width: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.jx-thumb-like {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 9px;
    border-radius: 20px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    background: #fff;
    color: #999;
    font-size: 0.72rem;
    cursor: pointer;
    transition: all 0.25s;
}

.jx-thumb-like svg {
    fill: currentColor;
    transition: all 0.25s;
}

.jx-thumb-like:hover {
    border-color: rgba(212, 165, 116, 0.5);
    color: var(--gold);
}

.jx-thumb-like.liked {
    border-color: rgba(231, 76, 60, 0.45);
    color: #e74c3c;
    background: rgba(231, 76, 60, 0.06);
}

.jx-thumb-like.liked svg {
    fill: #e74c3c;
}

.jx-thumb-desc {
    font-size: 0.82rem;
    line-height: 1.55;
    color: #666;
    margin: 0;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.jx-thumb-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.jx-thumb-tag {
    font-size: 0.68rem;
    padding: 4px 10px;
    border-radius: 12px;
    background: rgba(212, 165, 116, 0.12);
    color: #9c6a28;
    border: 1px solid rgba(212, 165, 116, 0.25);
    white-space: nowrap;
}

.jx-thumb-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    font-size: 0.72rem;
    color: #888;
    margin-top: auto;
    padding-top: 10px;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.jx-thumb-field {
    color: #9c6a28;
    font-weight: 500;
}

.jx-thumb-difficulty {
    display: inline-flex;
    gap: 3px;
}

.jx-thumb-difficulty .jx-dot {
    width: 6px;
    height: 6px;
    background: rgba(0, 0, 0, 0.1);
}

.jx-thumb-difficulty .jx-dot.active {
    background: var(--gold);
    box-shadow: none;
}

.jx-thumb-time {
    margin-left: auto;
    white-space: nowrap;
}

/* ============================================================
   Modal 全屏演示
   ============================================================ */
.jx-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s, visibility 0.35s;
    pointer-events: none;
}

.jx-modal.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.jx-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(5, 6, 10, 0.88);
    backdrop-filter: blur(6px);
    cursor: pointer;
    pointer-events: auto;
}

.jx-modal-shell {
    position: relative;
    width: 100%;
    max-width: 1120px;
    max-height: 92vh;
    overflow-y: auto;
    overflow-x: hidden;
    background: rgba(18, 22, 32, 0.98);
    border: 1px solid rgba(212, 165, 116, 0.22);
    border-radius: 18px;
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.7);
    transform: translateY(20px) scale(0.97);
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: auto;
}

.jx-modal.active .jx-modal-shell {
    transform: translateY(0) scale(1);
}

.jx-modal-close {
    position: absolute;
    top: 16px;
    right: 18px;
    z-index: 10;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(18, 22, 32, 0.9);
    color: var(--text-light);
    font-size: 1.6rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s;
}

.jx-modal-close:hover {
    border-color: var(--gold);
    color: var(--gold);
    transform: rotate(90deg);
}

.jx-modal-body {
    padding: 58px 34px 34px;
}

.jx-modal-body .jx-card {
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    max-width: 100%;
}

.jx-modal-body .jx-card-head {
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    margin-bottom: 4px;
}

.jx-modal-body .jx-card-title {
    font-size: 1.4rem;
}

.jx-modal-body .jx-canvas-wrap {
    height: 480px;
    background: #141824;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.jx-modal-body .jx-card-foot {
    display: none;
}

/* ---- AI 生成动画弹层：白金色浅色主题 ---- */
.jx-modal-shell.jx-modal-light {
    background: rgba(244, 241, 234, 0.98);
    border-color: rgba(212, 165, 116, 0.35);
    box-shadow: 0 40px 100px rgba(60, 50, 30, 0.25);
}

.jx-modal-shell.jx-modal-light .jx-modal-close {
    background: rgba(244, 241, 234, 0.95);
    border-color: rgba(90, 78, 60, 0.18);
    color: #4a4030;
}

.jx-modal-shell.jx-modal-light .jx-modal-close:hover {
    border-color: var(--gold);
    color: var(--gold-dim);
}

.jx-modal-shell.jx-modal-light .jx-card {
    color: var(--text-dark);
}

.jx-modal-shell.jx-modal-light .jx-card-head {
    border-bottom-color: rgba(90, 78, 60, 0.12);
}

.jx-modal-shell.jx-modal-light .jx-card-title {
    color: #2a2a3e;
}

.jx-modal-shell.jx-modal-light .jx-card-tags {
    color: #6e6250;
}

.jx-modal-shell.jx-modal-light .jx-problem {
    color: #3a3a4e;
    background: rgba(255, 255, 255, 0.55);
    border: 1px solid rgba(90, 78, 60, 0.10);
}

body.jx-modal-open {
    overflow: hidden;
}

/* 响应式 */
@media (max-width: 980px) {
    .jx-gallery {
        grid-template-columns: repeat(2, 1fr);
    }

    .jx-grid {
        grid-template-columns: 1fr;
    }

    .jx-modal-shell {
        max-height: 96vh;
        border-radius: 14px;
    }

    .jx-modal-body {
        padding: 52px 22px 28px;
    }

    .jx-modal-body .jx-canvas-wrap {
        height: 380px;
    }

    .jx-modal-close {
        top: 12px;
        right: 14px;
        width: 36px;
        height: 36px;
        font-size: 1.3rem;
    }
}

@media (max-width: 768px) {
    .jx-gallery {
        grid-template-columns: 1fr;
    }

    .jx-canvas-wrap {
        height: 280px;
    }

    .jx-card {
        padding: 20px 18px 18px;
    }

    .jx-modal {
        padding: 10px;
    }

    .jx-modal-body .jx-canvas-wrap {
        height: 300px;
    }
}

/* ============================================================
   弹层卡片「AI 助手」对话框
   ============================================================ */
.jx-card-ai-btn {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 0.78rem;
    font-family: var(--font-sans);
    letter-spacing: 0.04em;
    color: var(--gold-bright);
    background: rgba(212, 175, 55, 0.10);
    border: 1px solid rgba(212, 175, 55, 0.45);
    border-radius: 999px;
    cursor: pointer;
    transition: all 0.25s;
    white-space: nowrap;
}

.jx-card-ai-btn:hover {
    background: rgba(212, 175, 55, 0.20);
    border-color: var(--gold-bright);
    box-shadow: 0 0 14px rgba(212, 175, 55, 0.20);
    transform: translateY(-1px);
}

.jx-ai-dialog {
    position: fixed;
    inset: 0;
    z-index: 11000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    pointer-events: none;
}

.jx-ai-dialog.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.jx-ai-dialog-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(60, 55, 45, 0.45);
    backdrop-filter: blur(6px);
    cursor: pointer;
}

.jx-ai-dialog-shell {
    position: relative;
    width: 100%;
    max-width: 620px;
    max-height: 86vh;
    overflow: hidden;
    background: #f8f5ee;
    border: 1px solid rgba(180, 155, 115, 0.35);
    border-radius: 18px;
    box-shadow: 0 40px 100px rgba(80, 65, 40, 0.35);
    transform: translateY(16px) scale(0.98);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
}

.jx-ai-dialog.active .jx-ai-dialog-shell {
    transform: translateY(0) scale(1);
}

.jx-ai-dialog-close {
    position: absolute;
    top: 14px;
    right: 16px;
    z-index: 5;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid rgba(120, 105, 75, 0.25);
    background: rgba(255, 255, 255, 0.7);
    color: #5a4e3c;
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s;
}

.jx-ai-dialog-close:hover {
    border-color: var(--gold);
    color: var(--gold);
    background: #fff;
    transform: rotate(90deg);
}

.jx-ai-dialog-head {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px 14px;
    border-bottom: 1px solid rgba(180, 155, 115, 0.18);
    background: #faf7f0;
}

.jx-ai-dialog-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(212, 175, 55, 0.12);
    border: 1px solid rgba(212, 175, 55, 0.35);
    font-size: 1.2rem;
}

.jx-ai-dialog-title {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    color: #3a3225;
    margin: 0;
    letter-spacing: 0.04em;
}

.jx-ai-dialog-sub {
    font-size: 0.78rem;
    color: #7a6e58;
    margin: 3px 0 0;
}

/* 聊天消息区域 */
.jx-ai-dialog-chat {
    flex: 1;
    min-height: 0;
    padding: 18px 22px;
    overflow-y: auto;
    background: #f8f5ee;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.jx-ai-msg {
    display: flex;
    animation: jx-ai-fadein 0.3s ease;
}

.jx-ai-msg-user {
    justify-content: flex-end;
}

.jx-ai-msg-ai {
    justify-content: flex-start;
}

.jx-ai-msg-bubble {
    max-width: 88%;
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 0.9rem;
    line-height: 1.7;
    word-break: break-word;
}

.jx-ai-msg-user .jx-ai-msg-bubble {
    background: linear-gradient(135deg, #e7c463, #d4af37);
    color: #2a2216;
    border-bottom-right-radius: 4px;
}

.jx-ai-msg-ai .jx-ai-msg-bubble {
    background: #ffffff;
    color: #3a3225;
    border: 1px solid rgba(180, 155, 115, 0.22);
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 10px rgba(90, 75, 50, 0.05);
}

.jx-ai-msg-anim {
    margin-top: 12px;
    border-radius: 12px;
    overflow: hidden;
}

.jx-ai-msg-anim .gen-stage {
    background: #f4f1ea;
    border: 1px solid rgba(138, 115, 85, 0.18);
}

.jx-ai-msg-anim-err {
    margin: 8px 0 0;
    color: #b94a48;
    font-size: 0.82rem;
}

/* 输入区 */
.jx-ai-dialog-input-area {
    padding: 14px 22px 18px;
    background: #faf7f0;
    border-top: 1px solid rgba(180, 155, 115, 0.18);
}

.jx-ai-dialog-input-row {
    display: flex;
    gap: 10px;
    align-items: stretch;
}

.jx-ai-dialog-uploads {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0 4px;
    border-left: 1px solid rgba(180, 155, 115, 0.18);
    border-right: 1px solid rgba(180, 155, 115, 0.18);
}

.jx-ai-dialog-upload {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    border: 1px solid transparent;
    background: transparent;
    color: #8a7a5e;
    cursor: pointer;
    transition: all 0.25s;
}

.jx-ai-dialog-upload:hover {
    background: rgba(212, 175, 55, 0.12);
    border-color: rgba(212, 175, 55, 0.35);
    color: #9c6a28;
}

.jx-ai-dialog-attachments {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 10px;
    min-height: 0;
}

.jx-ai-dialog-attachment {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 8px;
    background: #fff;
    border: 1px solid rgba(180, 155, 115, 0.28);
    border-radius: 8px;
    font-size: 0.78rem;
    color: #5a4e3c;
}

.jx-ai-dialog-attachment img {
    width: 28px;
    height: 28px;
    object-fit: cover;
    border-radius: 4px;
}

.jx-ai-dialog-attachment button {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: none;
    background: rgba(192, 57, 43, 0.08);
    color: #b94a48;
    font-size: 0.7rem;
    cursor: pointer;
    line-height: 1;
}

.jx-ai-dialog-input {
    flex: 1;
    min-width: 0;
    padding: 11px 14px;
    font-size: 0.9rem;
    color: #3a3225;
    background: #ffffff;
    border: 1px solid rgba(180, 155, 115, 0.35);
    border-radius: 12px;
    outline: none;
    transition: border-color 0.25s, box-shadow 0.25s;
}

.jx-ai-dialog-input:focus {
    border-color: var(--gold-bright);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.14);
}

.jx-ai-dialog-input::placeholder {
    color: #9a8e78;
}

.jx-ai-dialog-send {
    flex-shrink: 0;
    padding: 11px 22px;
    font-size: 0.88rem;
    font-family: var(--font-sans);
    font-weight: 500;
    color: #2a2216;
    background: linear-gradient(135deg, #e7c463, #d4af37);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.jx-ai-dialog-send:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 8px 22px rgba(212, 175, 55, 0.28);
}

.jx-ai-dialog-send:disabled {
    opacity: 0.6;
    cursor: wait;
}

.jx-ai-dialog-tip {
    margin: 8px 0 0 2px;
    font-size: 0.72rem;
    color: #9a8e78;
}

/* 消息内状态与提示 */
.jx-ai-dialog-thinking {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #7a6e58;
}

.jx-ai-dialog-thinking span {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--gold);
    animation: jx-ai-dot 1.2s infinite ease-in-out both;
}

.jx-ai-dialog-thinking span:nth-child(1) { animation-delay: 0s; }
.jx-ai-dialog-thinking span:nth-child(2) { animation-delay: 0.15s; }
.jx-ai-dialog-thinking span:nth-child(3) { animation-delay: 0.3s; }

@keyframes jx-ai-dot {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.5; }
    40% { transform: scale(1); opacity: 1; }
}

.jx-ai-dialog-answer {
    margin-bottom: 8px;
    color: #3a3225;
}

.jx-ai-dialog-hint {
    color: #7a6e58;
    font-size: 0.82rem;
}

.jx-ai-dialog-error {
    color: #b94a48;
}

/* 解题思路 / 解题步骤 / 答案 面板（首页 ask 结果与 AI 对话框共用） */
.jx-solution {
    margin: 10px 0 2px;
    border-top: 1px dashed rgba(120, 90, 40, 0.25);
    padding-top: 10px;
}
.jx-solution-block {
    margin-bottom: 10px;
}
.jx-solution-block:last-child {
    margin-bottom: 0;
}
.jx-solution-label {
    font-weight: 600;
    color: #9c7a3c;
    font-size: 0.82rem;
    margin-bottom: 4px;
    letter-spacing: 0.04em;
}
.jx-solution-text {
    color: #3a3225;
    line-height: 1.7;
    font-size: 0.92rem;
}
.jx-solution-steps {
    margin: 4px 0 0;
    padding-left: 22px;
}
.jx-solution-steps li {
    margin: 5px 0;
    line-height: 1.6;
    color: #3a3225;
    font-size: 0.92rem;
}
.jx-solution-answer .jx-solution-text {
    font-weight: 600;
    color: #b94a48;
    font-size: 1rem;
}

@keyframes jx-ai-fadein {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

body.jx-ai-dialog-open {
    overflow: hidden;
}

@media (max-width: 640px) {
    .jx-ai-dialog {
        padding: 0;
        align-items: flex-end;
    }

    .jx-ai-dialog-shell {
        max-height: 94vh;
        border-radius: 16px 16px 0 0;
        border-bottom: none;
    }

    .jx-ai-dialog-head {
        padding: 16px 18px 12px;
    }

    .jx-ai-dialog-chat {
        padding: 14px 16px;
    }

    .jx-ai-dialog-input-area {
        padding: 12px 16px 18px;
    }

    .jx-ai-dialog-input-row {
        flex-wrap: wrap;
    }

    .jx-ai-dialog-send {
        width: 100%;
    }
}

/* 让新增卡片标题更醒目 */
.jx-card-num.new {
    color: var(--jade);
}

/* ---- 隐藏左下角键盘提示 ---- */
#kbd-hint,
.kbd-hint {
    display: none !important;
}

/* ============================================================
   指南页教学区：一栏一栏横向滑动布局
   ============================================================ */

/* 区域标题 */
.jx-guide-extra {
    margin-top: 48px;
    padding-top: 40px;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    width: 100%;
    max-width: var(--max-w);
    margin-left: auto;
    margin-right: auto;
}

.jx-guide-extra-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 34px;
}

.jx-guide-extra-head .section-title {
    font-size: clamp(1.7rem, 4.5vw, 2.8rem);
    color: var(--text-dark);
    -webkit-text-fill-color: var(--text-dark);
    background: none;
    margin-bottom: 12px;
}

.jx-guide-extra-sub {
    font-size: 0.95rem;
    color: #777;
    margin: 0;
    letter-spacing: 0.08em;
}

/* 过滤标签栏 */
.jx-filter-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    max-width: var(--max-w);
    margin: 0 auto 48px;
    padding: 0 20px;
}

.jx-filter-btn {
    font-size: 0.8rem;
    padding: 8px 18px;
    border-radius: 20px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    background: #fff;
    color: #666;
    cursor: pointer;
    transition: all 0.25s;
    font-family: var(--font-sans);
}

.jx-filter-btn:hover {
    border-color: rgba(212, 165, 116, 0.6);
    color: #9c6a28;
}

.jx-filter-btn.active {
    border-color: #9c6a28;
    background: #9c6a28;
    color: #fff;
    font-weight: 500;
}

/* 每一栏 */
.jx-rows {
    display: flex;
    flex-direction: column;
    gap: 56px;
    width: 100%;
}

.jx-row {
    width: 100%;
    min-width: 0;
}

.jx-row-head {
    display: flex;
    align-items: center;
    gap: 16px;
    max-width: var(--max-w);
    margin: 0 auto 20px;
    padding: 0 20px;
}

.jx-row-icon {
    flex-shrink: 0;
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(212, 165, 116, 0.12);
    border: 1px solid rgba(212, 165, 116, 0.25);
    color: var(--gold);
    font-family: var(--font-mono);
    font-size: 1.4rem;
}

.jx-row-titles {
    flex: 1;
    min-width: 0;
}

.jx-row-title {
    font-family: var(--font-serif);
    font-size: 1.45rem;
    font-weight: 600;
    color: var(--text-dark);
    letter-spacing: 0.08em;
    margin: 0;
    line-height: 1.2;
}

.jx-row-quote {
    font-size: 0.85rem;
    color: #888;
    margin: 6px 0 0;
    line-height: 1.5;
    font-style: italic;
}

.jx-row-author {
    color: #9c6a28;
    font-style: normal;
    font-weight: 500;
    margin-left: 4px;
}

.jx-row-count {
    margin-left: auto;
    font-size: 0.8rem;
    color: #888;
    background: rgba(212, 165, 116, 0.1);
    border: 1px solid rgba(212, 165, 116, 0.2);
    padding: 4px 13px;
    border-radius: 20px;
    white-space: nowrap;
}

/* 横向滚动容器 */
.jx-row-scroll {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    padding: 10px 20px 28px;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    scrollbar-width: thin;
    scrollbar-color: rgba(212, 165, 116, 0.4) transparent;
    cursor: grab;
}

.jx-row-scroll.dragging {
    cursor: grabbing;
    scroll-snap-type: none;
}

.jx-row-scroll::-webkit-scrollbar {
    height: 8px;
}

.jx-row-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.jx-row-scroll::-webkit-scrollbar-thumb {
    background: rgba(212, 165, 116, 0.4);
    border-radius: 4px;
}

.jx-row-scroll .jx-card-thumb {
    scroll-snap-align: start;
}

/* 教学卡片头部图标（Modal 内完整卡片用） */
.jx-card-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 13px;
    background: rgba(212, 165, 116, 0.12);
    border: 1px solid rgba(212, 165, 116, 0.22);
    color: var(--gold);
    font-family: var(--font-mono);
    font-size: 1.35rem;
}

/* 响应式：一栏布局在窄屏收窄 */
@media (max-width: 980px) {
    .jx-card-thumb {
        width: 260px;
        height: 375px;
    }

    .jx-thumb-art {
        height: 145px;
    }

    .jx-row-head {
        flex-wrap: wrap;
        gap: 12px;
    }

    .jx-row-title {
        font-size: 1.3rem;
    }

    .jx-row-count {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .jx-card-thumb {
        width: 240px;
        height: 360px;
    }

    .jx-thumb-art {
        height: 135px;
    }

    .jx-filter-bar {
        gap: 8px;
        margin-bottom: 36px;
    }

    .jx-filter-btn {
        padding: 6px 14px;
        font-size: 0.75rem;
    }

    .jx-row-head {
        padding: 0 16px;
    }

    .jx-row-scroll {
        padding: 10px 16px 24px;
        gap: 14px;
    }
}