/* 口算题生成器 - 暖橙主题 */

.kousuan-page {
    --ks-bg: #FBF7F0;
    --ks-surface: #FFFFFF;
    --ks-primary: #B45309;
    --ks-primary-hover: #92400E;
    --ks-accent: #EA580C;
    --ks-yellow: #FEF3C7;
    --ks-warm: #FED7AA;
    --ks-border: #E0DAC9;
    --ks-text: #2A2520;
    --ks-text-2: #57534E;
    --ks-text-3: #857F75;

    max-width: 1340px;
    margin: 0 auto;
    padding: 18px 16px 60px;
    background: var(--ks-bg);
    color: var(--ks-text);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", system-ui, sans-serif;
}

.kousuan-page .ks-breadcrumb { font-size: 13px; color: var(--ks-text-3); margin-bottom: 12px; }
.kousuan-page .ks-breadcrumb a { color: var(--ks-text-2); text-decoration: none; }
.kousuan-page .ks-breadcrumb a:hover { color: var(--ks-primary); }
.kousuan-page .ks-breadcrumb .ks-sep { margin: 0 8px; color: var(--ks-text-3); }

.kousuan-page .ks-hero {
    background: var(--ks-surface);
    border: 1px solid rgba(180,83,9,0.10);
    border-radius: 22px;
    padding: 32px 28px;
    margin-bottom: 22px;
    text-align: center;
    box-shadow: 0 2px 0 rgba(180,83,9,0.08);
}
.kousuan-page .ks-hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 5px 12px;
    background: var(--ks-yellow);
    color: #92400E;
    border: 1px solid #FCD34D;
    border-radius: 999px;
    font-size: 12px; font-weight: 600;
    margin-bottom: 12px;
}
.kousuan-page .ks-hero-badge .dot {
    width: 6px; height: 6px;
    background: var(--ks-primary);
    border-radius: 50%;
    animation: ksPulse 1.8s ease-in-out infinite;
}
@keyframes ksPulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.4; transform: scale(1.5); } }
.kousuan-page .ks-hero-title { font-size: 28px; font-weight: 700; margin: 0 0 8px; color: var(--ks-text); font-family: "PingFang SC", "Songti SC", serif; }
.kousuan-page .ks-hero-sub { font-size: 14px; color: var(--ks-text-2); margin: 0; line-height: 1.6; }

.kousuan-page .ks-app {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 20px;
    align-items: start;
}

/* 左侧面板 */
.kousuan-page .ks-panel {
    background: var(--ks-surface);
    border: 1px solid var(--ks-border);
    border-radius: 18px;
    padding: 20px 18px;
    position: sticky;
    top: 16px;
    max-height: calc(100vh - 32px);
    overflow-y: auto;
}
.kousuan-page .ks-field { margin-bottom: 16px; }
.kousuan-page .ks-field-row { display: flex; gap: 12px; }
.kousuan-page .ks-half { flex: 1; }
.kousuan-page .ks-label {
    display: block;
    font-size: 12px;
    color: var(--ks-text-2);
    font-weight: 600;
    margin-bottom: 6px;
}
.kousuan-page .ks-hint-inline { font-weight: 400; color: var(--ks-text-3); font-size: 11px; margin-left: 4px; }
.kousuan-page .ks-input {
    width: 100%;
    padding: 7px 10px;
    border: 1px solid var(--ks-border);
    border-radius: 8px;
    font-size: 13px;
    color: var(--ks-text);
    background: #FDFBF6;
    box-sizing: border-box;
    font-family: inherit;
}
.kousuan-page .ks-input:focus {
    outline: none;
    border-color: var(--ks-accent);
    box-shadow: 0 0 0 3px rgba(234,88,12,0.12);
}

/* 选项胶囊 */
.kousuan-page .ks-options { display: flex; flex-wrap: wrap; gap: 6px; }
.kousuan-page .ks-opt {
    flex: 1 1 30%; min-width: 60px;
    position: relative; cursor: pointer; user-select: none;
}
.kousuan-page .ks-opt input { position: absolute; opacity: 0; pointer-events: none; }
.kousuan-page .ks-opt span {
    display: block;
    padding: 6px 4px;
    text-align: center;
    font-size: 12px;
    border: 1px solid var(--ks-border);
    border-radius: 8px;
    background: #F5EFE3;
    color: var(--ks-text-2);
    transition: all 0.15s;
}
.kousuan-page .ks-opt input:checked + span {
    background: linear-gradient(135deg, var(--ks-accent), var(--ks-primary));
    color: #fff;
    border-color: var(--ks-primary);
    font-weight: 600;
}

/* checkboxes */
.kousuan-page .ks-checks { display: flex; flex-wrap: wrap; gap: 8px 16px; }
.kousuan-page .ks-chk {
    display: inline-flex; align-items: center; gap: 4px;
    font-size: 13px; color: var(--ks-text-2);
    cursor: pointer; user-select: none;
}
.kousuan-page .ks-chk input { accent-color: var(--ks-primary); }

.kousuan-page .ks-toggle { display: flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; }
.kousuan-page .ks-toggle input { position: absolute; opacity: 0; pointer-events: none; }
.kousuan-page .ks-toggle-slider {
    width: 30px; height: 16px;
    background: #C8C2B5;
    border-radius: 999px;
    position: relative;
    transition: background 0.2s;
}
.kousuan-page .ks-toggle-slider::after {
    content: ""; position: absolute;
    top: 2px; left: 2px;
    width: 12px; height: 12px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.kousuan-page .ks-toggle input:checked + .ks-toggle-slider { background: var(--ks-primary); }
.kousuan-page .ks-toggle input:checked + .ks-toggle-slider::after { transform: translateX(14px); }
.kousuan-page .ks-toggle-label { font-size: 12px; color: var(--ks-text-2); }

/* 进阶设置 */
.kousuan-page .ks-advanced {
    margin-top: 6px;
    border: 1px solid var(--ks-border);
    border-radius: 10px;
    background: #FDFBF6;
}
.kousuan-page .ks-advanced summary {
    padding: 9px 12px;
    cursor: pointer;
    font-size: 13px;
    color: var(--ks-text-2);
    list-style: none;
}
.kousuan-page .ks-advanced summary::-webkit-details-marker { display: none; }
.kousuan-page .ks-advanced summary::after { content: " ▾"; font-size: 10px; opacity: 0.6; }
.kousuan-page .ks-advanced[open] summary::after { content: " ▴"; }
.kousuan-page .ks-advanced-body { padding: 8px 12px 12px; border-top: 1px solid var(--ks-border); }

/* 按钮 */
.kousuan-page .ks-actions {
    margin-top: 18px;
    display: flex; flex-direction: column; gap: 8px;
}
.kousuan-page .ks-btn {
    width: 100%;
    padding: 10px 14px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.15s;
}
.kousuan-page .ks-btn-primary {
    background: linear-gradient(135deg, var(--ks-accent), var(--ks-primary));
    color: #fff;
    box-shadow: 0 4px 10px rgba(234,88,12,0.25);
}
.kousuan-page .ks-btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 14px rgba(234,88,12,0.35); }
.kousuan-page .ks-btn-secondary { background: var(--ks-yellow); color: var(--ks-primary); border: 1px solid #FCD34D; }
.kousuan-page .ks-btn-secondary:hover { background: var(--ks-warm); }
.kousuan-page .ks-tip { font-size: 12px; color: var(--ks-text-3); text-align: center; margin-top: 12px; line-height: 1.5; }


.kousuan-page .ks-records {
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px solid var(--ks-border);
}
.kousuan-page .ks-records-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 13px;
    color: var(--ks-text-2);
}
.kousuan-page .ks-records-head button {
    border: 1px solid #FCD34D;
    background: var(--ks-yellow);
    color: var(--ks-primary);
    border-radius: 8px;
    padding: 3px 8px;
    cursor: pointer;
}
.kousuan-page .ks-records-list { display: flex; flex-direction: column; gap: 6px; }
.kousuan-page .ks-record-item {
    width: 100%;
    text-align: left;
    border: 1px solid var(--ks-border);
    border-radius: 10px;
    background: #fffaf2;
    padding: 8px;
    cursor: pointer;
    font-family: inherit;
}
.kousuan-page .ks-record-item:hover { border-color: #FCD34D; background: #FEF3C7; }
.kousuan-page .ks-record-item.is-active {
    border-color: var(--ks-primary);
    background: #FEF3C7;
    box-shadow: 0 0 0 2px rgba(180, 83, 9, .14);
}
.kousuan-page .ks-record-title { display: block; color: var(--ks-text); font-weight: 700; font-size: 13px; }
.kousuan-page .ks-record-meta { display: block; color: var(--ks-text-3); font-size: 11px; margin-top: 3px; line-height: 1.4; }
.kousuan-page .ks-record-empty { color: var(--ks-text-3); font-size: 12px; padding: 8px; text-align: center; }

/* 右侧预览 */
.kousuan-page .ks-preview-wrap {
    background: var(--ks-surface);
    border: 1px solid var(--ks-border);
    border-radius: 18px;
    padding: 16px;
    min-height: 600px;
}
.kousuan-page .ks-preview-toolbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0 4px 12px; border-bottom: 1px solid var(--ks-border);
    margin-bottom: 16px;
}
.kousuan-page .ks-preview-title { font-size: 14px; font-weight: 600; color: var(--ks-text-2); }
.kousuan-page .ks-preview-meta { font-size: 12px; color: var(--ks-text-3); }

.kousuan-page .ks-loading {
    padding: 60px 20px; text-align: center; color: var(--ks-primary); font-size: 14px;
}
.kousuan-page .ks-empty {
    padding: 80px 20px; text-align: center; color: var(--ks-text-3); font-size: 14px;
}
.kousuan-page .ks-error {
    padding: 30px; text-align: center; color: #B91C1C;
    background: #FEE2E2; border-radius: 10px;
}

.kousuan-page .ks-pages { display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 8px 0; overflow-x: auto; }
.kousuan-page .ks-page {
    width: 210mm; min-height: 297mm;
    padding: 10mm 12mm;
    background: #fff;
    color: #1a1a1a;
    border: 1px solid #e6e6e6;
    box-sizing: border-box;
    flex-shrink: 0;
}
.kousuan-page .ks-page-top { position: relative; min-height: 34mm; margin: 0 0 3mm; }
.kousuan-page .ks-page-title {
    text-align: center;
    font-size: 16pt;
    font-weight: 700;
    margin: 0;
    padding-top: 12mm;
    color: #000;
}
.kousuan-page .ks-page-header {
    display: flex; gap: 8mm; margin-bottom: 6mm;
    font-size: 11pt; font-weight: 600;
}
.kousuan-page .ks-page-header span { flex: 1; }
.kousuan-page .ks-page-header u {
    display: inline-block; min-width: 22mm;
    border-bottom: 1px solid #333;
    text-decoration: none;
    height: 1em;
}

.kousuan-page .ks-answer-card {
    position: absolute;
    left: 0;
    top: 0;
    width: 30mm;
    min-height: 32mm;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    color: #92400e;
    font-size: 9pt;
    font-weight: 700;
}
.kousuan-page .ks-answer-brand {
    position: relative;
    height: 7mm;
    margin: 0 auto .6mm;
    width: 24mm;
    color: #b45309;
    font-size: 9.5pt;
    font-weight: 800;
    letter-spacing: 0;
}
.kousuan-page .ks-answer-brand span { position: absolute; top: 0; display: block; }
.kousuan-page .ks-answer-brand span:nth-child(1) { left: 2.5mm; top: 2.5mm; transform: rotate(-18deg); }
.kousuan-page .ks-answer-brand span:nth-child(2) { left: 8mm; top: .6mm; transform: rotate(-6deg); }
.kousuan-page .ks-answer-brand span:nth-child(3) { left: 13.5mm; top: .6mm; transform: rotate(6deg); }
.kousuan-page .ks-answer-brand span:nth-child(4) { left: 19mm; top: 2.5mm; transform: rotate(18deg); }
.kousuan-page .ks-answer-qr { width: 18mm; margin: 0 auto 1mm; }
.kousuan-page .ks-answer-qr img { display: block; width: 18mm; height: 18mm; margin: 0 auto; }
.kousuan-page .ks-answer-info { width: 30mm; white-space: nowrap; line-height: 1.2; text-align: center; }

.kousuan-page .ks-modal { position: fixed; inset: 0; z-index: 9999; }
.kousuan-page .ks-modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.42); }
.kousuan-page .ks-modal-card {
    position: relative;
    max-width: 460px;
    margin: 12vh auto 0;
    background: #fff;
    border-radius: 18px;
    padding: 22px;
    box-shadow: 0 20px 60px rgba(0,0,0,.22);
    color: var(--ks-text);
}
.kousuan-page .ks-modal-card h3 { margin: 0 0 12px; font-size: 20px; color: var(--ks-text); }
.kousuan-page .ks-modal-card p { margin: 8px 0; color: var(--ks-text-2); line-height: 1.7; font-size: 14px; }
.kousuan-page .ks-modal-warning { color: #b45309 !important; font-weight: 700; }
.kousuan-page .ks-modal-label { display: block; margin: 14px 0 8px; color: var(--ks-text-2); font-weight: 700; }
.kousuan-page .ks-modal-error { margin-top: 8px; color: #b91c1c; font-size: 13px; }
.kousuan-page .ks-modal-actions { display: flex; gap: 10px; margin-top: 16px; }
.kousuan-page .ks-modal-actions .ks-btn { flex: 1; }

.kousuan-page .ks-grid {
    display: grid;
    gap: 8mm 4mm;
}
.kousuan-page .ks-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11pt;
    line-height: 1.6;
}
.kousuan-page .ks-no { color: #888; font-size: 9pt; min-width: 2em; }
.kousuan-page .ks-expr { flex: 1; }

/* 分数 table 渲染 */
.kousuan-page .ks-frac {
    display: inline-table;
    vertical-align: middle;
    margin: 0 2px;
    border-collapse: collapse;
}
.kousuan-page .ks-frac td {
    padding: 0 2px;
    text-align: center;
    line-height: 1.2;
}
.kousuan-page .ks-frac .ks-num { border-bottom: 1px solid currentColor; }

/* 响应式 */
@media (max-width: 1024px) {
    .kousuan-page .ks-app { grid-template-columns: 1fr; }
    .kousuan-page .ks-panel { position: static; max-height: none; }
    .kousuan-page .ks-page { width: 100%; min-height: auto; padding: 8mm; }
}

/* ================================================
   暗色模式适配 - 左侧操作面板 + Hero（站点暖咖啡色板，与字帖等工具风格一致）
   面板用深咖啡卡面 + 浅米文字，与全站 .card / .panel 暗色一致
   ================================================ */
[data-theme="dark"] .kousuan-page .ks-hero,
[data-theme="dark"] .kousuan-page .ks-panel {
    background: #221C17;
    border-color: #4A3A2C;
    box-shadow: 0 1px 0 rgba(255,255,255,0.04) inset, 0 8px 24px rgba(0,0,0,0.30);
}
[data-theme="dark"] .kousuan-page .ks-hero-title { color: #E8DCC5; }
[data-theme="dark"] .kousuan-page .ks-hero-sub { color: #B5A795; }
[data-theme="dark"] .kousuan-page .ks-hero-badge {
    background: #3C2F25;
    color: #E6A82E;
    border-color: #5C4838;
}
[data-theme="dark"] .kousuan-page .ks-hero-badge .dot { background: #E6A82E; }
[data-theme="dark"] .kousuan-page .ks-breadcrumb { color: #7D7263; }
[data-theme="dark"] .kousuan-page .ks-breadcrumb a { color: #B5A795; }
[data-theme="dark"] .kousuan-page .ks-breadcrumb a:hover { color: #E6A82E; }

/* 面板内表单 */
[data-theme="dark"] .kousuan-page .ks-label { color: #B5A795; }
[data-theme="dark"] .kousuan-page .ks-hint-inline { color: #7D7263; }
[data-theme="dark"] .kousuan-page .ks-chk,
[data-theme="dark"] .kousuan-page .ks-toggle-label { color: #B5A795; }
[data-theme="dark"] .kousuan-page .ks-input,
[data-theme="dark"] .kousuan-page input[type="number"].ks-input,
[data-theme="dark"] .kousuan-page input[type="text"].ks-input {
    background: #161311;
    border-color: #4A3A2C;
    color: #E8DCC5;
}
[data-theme="dark"] .kousuan-page .ks-input:focus { border-color: #E5874F; box-shadow: 0 0 0 3px rgba(229,135,79,0.18); }

/* 选项 chip - 年级 / 数字类型等 */
[data-theme="dark"] .kousuan-page .ks-opt span {
    background: #2E2620;
    border-color: #4A3A2C;
    color: #B5A795;
}
[data-theme="dark"] .kousuan-page .ks-opt input:checked + span {
    background: linear-gradient(135deg, #C2691F, #92400E);
    color: #FEF3C7;
    border-color: #92400E;
}

/* 进阶折叠 */
[data-theme="dark"] .kousuan-page .ks-advanced {
    background: #2E2620;
    border-color: #4A3A2C;
}
[data-theme="dark"] .kousuan-page .ks-advanced summary { color: #B5A795; }
[data-theme="dark"] .kousuan-page .ks-advanced-body { color: #7D7263; border-top-color: #4A3A2C; }

/* 开关 */
[data-theme="dark"] .kousuan-page .ks-toggle-slider { background: #4A3A2C; }
[data-theme="dark"] .kousuan-page .ks-toggle input:checked + .ks-toggle-slider { background: #B45309; }
[data-theme="dark"] .kousuan-page .ks-toggle-slider::after { background: #E8DCC5; }

/* 按钮 */
[data-theme="dark"] .kousuan-page .ks-btn-primary {
    background: linear-gradient(135deg, #C2691F, #92400E);
    color: #FEF3C7;
    box-shadow: 0 4px 10px rgba(0,0,0,0.30);
}
[data-theme="dark"] .kousuan-page .ks-btn-primary:hover { box-shadow: 0 6px 14px rgba(180,83,9,0.45); }
[data-theme="dark"] .kousuan-page .ks-btn-secondary {
    background: #3C2F25;
    color: #E6A82E;
    border-color: #5C4838;
}
[data-theme="dark"] .kousuan-page .ks-btn-secondary:hover { background: #4A3A2C; color: #FCD34D; }
[data-theme="dark"] .kousuan-page .ks-tip,
[data-theme="dark"] .kousuan-page .ks-records-head,
[data-theme="dark"] .kousuan-page .ks-record-meta,
[data-theme="dark"] .kousuan-page .ks-record-empty { color: #7D7263; }
[data-theme="dark"] .kousuan-page .ks-records { border-top-color: #4A3A2C; }
[data-theme="dark"] .kousuan-page .ks-record-item { background: #2E2620; border-color: #4A3A2C; }
[data-theme="dark"] .kousuan-page .ks-record-item.is-active { background: #3C2F25; border-color: #B45309; box-shadow: 0 0 0 2px rgba(180,83,9,.22); }
[data-theme="dark"] .kousuan-page .ks-record-title { color: #E8DCC5; }
[data-theme="dark"] .kousuan-page .ks-modal-card { background: #221C17; color: #E8DCC5; }
[data-theme="dark"] .kousuan-page .ks-modal-card h3 { color: #E8DCC5; }
[data-theme="dark"] .kousuan-page .ks-modal-card p,
[data-theme="dark"] .kousuan-page .ks-modal-label { color: #B5A795; }

/* ================================================
   用户要求：A4 预览纸张 + 实时预览容器 + 说明文章 在夜间也按白天模式
   .ks-page 是 JS 渲染的 A4 纸；.ks-preview-wrap 是它的外层卡；.ks-article 是底部说明
   用 .kousuan-page 三类链 + !important 锁死，覆盖全站 [data-theme="dark"] 染色规则
   ================================================ */
[data-theme="dark"] .kousuan-page .ks-preview-wrap,
[data-theme="dark"] .kousuan-page .ks-article {
    background: #FFFFFF !important;
    border-color: #E0DAC9 !important;
    color: #1a1a1a !important;
    box-shadow: 0 2px 0 rgba(180,83,9,0.06) !important;
}
[data-theme="dark"] .kousuan-page .ks-preview-toolbar { border-bottom-color: #E0DAC9 !important; }
[data-theme="dark"] .kousuan-page .ks-preview-title { color: #1a1a1a !important; }
[data-theme="dark"] .kousuan-page .ks-preview-meta { color: #555 !important; }
[data-theme="dark"] .kousuan-page .ks-empty,
[data-theme="dark"] .kousuan-page .ks-loading { color: #666 !important; }

/* A4 纸张 + 预览出来的题目本身：白底黑字 */
[data-theme="dark"] .kousuan-page .ks-page {
    background: #FFFFFF !important;
    color: #1a1a1a !important;
    border-color: #e6e6e6 !important;
    box-shadow: none !important;
}
[data-theme="dark"] .kousuan-page .ks-page,
[data-theme="dark"] .kousuan-page .ks-page *,
[data-theme="dark"] .kousuan-page .ks-page-title,
[data-theme="dark"] .kousuan-page .ks-page-header,
[data-theme="dark"] .kousuan-page .ks-page-header *,
[data-theme="dark"] .kousuan-page .ks-grid,
[data-theme="dark"] .kousuan-page .ks-grid *,
[data-theme="dark"] .kousuan-page .ks-page-footer {
    color: #1a1a1a !important;
}
[data-theme="dark"] .kousuan-page .ks-page-title { color: #000 !important; }

/* 说明文章 - 黑字 + 暖橙 strong / link */
[data-theme="dark"] .kousuan-page .ks-article,
[data-theme="dark"] .kousuan-page .ks-article p,
[data-theme="dark"] .kousuan-page .ks-article ul,
[data-theme="dark"] .kousuan-page .ks-article ul li,
[data-theme="dark"] .kousuan-page .ks-article li { color: #1a1a1a !important; }
[data-theme="dark"] .kousuan-page .ks-article h2 { color: #000 !important; border-left-color: #B45309 !important; }
[data-theme="dark"] .kousuan-page .ks-article h3,
[data-theme="dark"] .kousuan-page .ks-article h4 { color: #000 !important; }
[data-theme="dark"] .kousuan-page .ks-article strong,
[data-theme="dark"] .kousuan-page .ks-article b { color: #B45309 !important; }
[data-theme="dark"] .kousuan-page .ks-article a { color: #B45309 !important; }
[data-theme="dark"] .kousuan-page .ks-article a:hover { color: #92400E !important; }
[data-theme="dark"] .kousuan-page .ks-presets li { background: #FEF3C7 !important; border-color: #FCD34D !important; color: #B45309 !important; }
[data-theme="dark"] .kousuan-page .ks-presets a { color: #B45309 !important; }
[data-theme="dark"] .kousuan-page .ks-presets a:hover { color: #92400E !important; }

/* 打印：只保留 .ks-preview 内的 .ks-page 内容，其它全部 display:none 释放空间 */
@media print {
    /* 上 18mm，左右 15mm，下 18mm —— 给所有页面都留出边距 */
    @page { size: A4 portrait; margin: 18mm 15mm; }
    body { background: #fff !important; margin: 0 !important; padding: 0 !important; }
    /* 全局导航 / 页脚 / 微信浮窗 等通用元素一律隐藏 */
    body > nav,
    body > header,
    body > footer,
    body > .navbar,
    body > .site-header,
    body > .site-footer,
    nav.navbar,
    header.navbar,
    .navbar,
    .site-header,
    .site-footer,
    .breadcrumb,
    .container > .navbar,
    .container > nav,
    .footer,
    .bottom-tab-bar,
    .menu-panel { display: none !important; }
    .kousuan-page { padding: 0 !important; margin: 0 !important; max-width: none !important; background: #fff !important; }
    .kousuan-page > *:not(.ks-app) { display: none !important; }
    .kousuan-page .ks-app { display: block !important; grid-template-columns: none !important; gap: 0 !important; }
    .kousuan-page .ks-app > *:not(.ks-preview-wrap) { display: none !important; }
    .kousuan-page .ks-preview-wrap { border: none !important; padding: 0 !important; background: transparent !important; min-height: 0 !important; box-shadow: none !important; }
    .kousuan-page .ks-preview-toolbar,
    .kousuan-page .ks-empty,
    .kousuan-page .ks-loading,
    .kousuan-page .ks-error { display: none !important; }
    .kousuan-page .ks-pages { display: block !important; padding: 0 !important; gap: 0 !important; overflow: visible !important; }
    .kousuan-page .ks-page {
        width: 100% !important;
        min-height: 0 !important;
        padding: 0 !important;
        border: none !important;
        box-shadow: none !important;
        page-break-after: always;
    }
    .kousuan-page .ks-page:last-child { page-break-after: auto; }
    .kousuan-page .ks-answer-card { page-break-inside: avoid; }
    .kousuan-page .ks-grid { page-break-inside: auto; }
    .kousuan-page .ks-item { page-break-inside: avoid; }
}

/* 显示答案样式 */
.kousuan-page .ks-ans {
    display: inline-block;
    color: #B91C1C;
    font-weight: 600;
    padding: 0 2px;
}
.kousuan-page .ks-btn-secondary.is-active {
    background: linear-gradient(135deg, var(--ks-accent), var(--ks-primary));
    color: #fff;
    border-color: var(--ks-primary);
}

/* === 答案页（带完整式子） === */
.kousuan-page .ks-answer-page { margin-top: 16px; }
.kousuan-page .ks-answer-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6mm 8mm;
    font-size: 11pt;
    line-height: 1.7;
    margin-top: 4mm;
}
.kousuan-page .ks-answer-item {
    display: flex;
    align-items: center;
    gap: 4px;
    color: #1a1a1a;
}
.kousuan-page .ks-answer-item .ks-no { color: #888; font-size: 9pt; min-width: 2em; }
.kousuan-page .ks-answer-item .ks-expr { flex: 1; }
@media print {
    .kousuan-page .ks-answer-page {
        page-break-before: always;
        break-before: page;
        margin-top: 0;
    }
    .kousuan-page .ks-answer-list { grid-template-columns: repeat(2, 1fr); }
}