:root {
    /* 定义全局默认值 */
    --paper-font-family: "STZhongsong", serif;
    --paper-base-size: 16px;
    --paper-font-vertical-align: 0.045em; /* 垂直偏移 */
    --paper-font-scale-size: 1em; /* 字号系数，万一某个字体的字特别大/小之类 */
}

@font-face {
    font-family: 'bracket-fix';
    src: local('simsun');
    unicode-range: U+0028, U+0029;
}

/* ===== 数学字体样式 ===== */
@font-face {
    font-family: 'MathFix';
    src: url('https://cdn.jsdelivr.net/npm/katex@0.16.9/dist/fonts/KaTeX_Main-Regular.woff2') format('woff2');
    unicode-range: U+007C, U+2223, U+2200, U+2203, U+2032, U+22C5, U+2218, U+02C9; 
}

/* =========================================
    1. 您的原始样式 (Scope 隔离版 - 未修改)
    ========================================= */
.paper-style-scope {
    font-family: 'bracket-fix', 'Times New Roman', var(--paper-font-family);
    color: #000000;
    line-height: 1.8em;
    word-break: break-all;
    font-size: var(--paper-base-size);
    line-break: strict;
}

.paper-style-scope .chinese-fix {
    font-family: var(--paper-font-family);
    font-size: var(--paper-font-scale-size);
    vertical-align: var(--paper-font-vertical-align);
}

.paper-style-scope .katex { font-family: 'MathFix', 'Times New Roman', serif !important; font-size: 1.1em; }
.paper-style-scope .mrel, 
.paper-style-scope .mopen, 
.paper-style-scope .mclose { font-family: KaTeX_Main !important; }
.paper-style-scope .mathnormal { font-family: 'MathFix', 'Times New Roman', serif !important; }
.paper-style-scope .mord.mtight { font-family: 'MathFix', 'Times New Roman', serif !important; }
.paper-style-scope .katex-display { margin: 0; }

/* .paper-style-scope pp::before {
    content: "(" counter(pp-counter) ")";
    counter-increment: pp-counter;
    position: absolute;
    left: -30px;
    color: black;
    font-size: 1.1em;
    font-family: 'bracket-fix', Times New Roman, var(--paper-font-family);
} */

/* .paper-style-scope li { counter-reset: pp-counter; } */
.paper-style-scope .sub-question li::marker { content: "(" counter(list-item) ") "; }
.paper-style-scope li::marker { font-size: 1.1em; }
.paper-style-scope pp { margin-left: 30px; position: relative; display: block; }
.paper-style-scope ol { list-style: decimal; padding-left: 2em; margin: 0; }
.paper-style-scope ul { list-style: disc; padding-left: 2em; margin: 0; }
.paper-style-scope strong { font-weight: bold; }

.paper-style-scope .title-text {
    display: block;
    font-size: 1.8em;
    line-height: 1.6em;
    /* padding: 5px; */
    text-align: center;
    /* margin-bottom: 1em; */
    font-weight: bold;
    font-family: 'Times New Roman', 'Heiti SC' !important;
}

.paper-style-scope .small-title {
    display: inline-block;
    border: 1px solid;
    font-size: 1.1em;
    line-height: 1.6em;
    padding: 4px;
    text-align: center;
}

.paper-style-scope .third-title {
    font-size: 1em;
    /* font-weight: bold; */
    font-family: 'Times New Roman', 'SimHei', 'Heiti SC' !important;
}

/* (1) #title0a: 华文中宋 + Times, 25px, 居中 */
.paper-style-scope .title-0a {
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: "Times New Roman", "STZhongsong", serif;
    font-size: 1.6em;
    line-height: 1.5em;
    text-align: center;
}

/* (2) #title0b: 黑体 + Times, 30px, 居中 */
.paper-style-scope .title-0b {
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: "Times New Roman", "SimHei", "Heiti SC", sans-serif;
    font-size: 2em;
    line-height: 2em;
    text-align: center;
}

/* (3) #note: 楷体 + Times, 10px, 居中 */
.paper-style-scope .note-text {
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: "Times New Roman", "STKaiti", "Kaiti SC", serif;
    font-size: 0.9em;
    /* color: #666; 备注通常颜色稍浅 */
    text-align: center;
}

/* =========================================
    2. 排版系统核心样式
    ========================================= */
body { margin: 0; overflow: hidden; background: #e5e7eb; }

.a4-page {
    width: 210mm;
    height: 297mm;
    /* 将 height 改为 min-height，保证空页依然是A4比例 */
    /* height: max-content; 允许超出时自然拉伸，避免截断 */
    background: white;
    margin: 0 auto 20px auto;
    padding: 20mm;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: relative;
    box-sizing: border-box;
    overflow: hidden;/*visible; /* 去掉 hidden，使得内容绝对不被隐藏 */
    display: flex;
    flex-direction: column;
}

/* [新增] 选择题智能排版样式 */
.paper-style-scope .mcq-options {
    display: grid;
    width: 100%;
    /* margin-top: 0.5em; */
    /* row-gap: 0.8em; */
}
.paper-style-scope .mcq-cols-4 { grid-template-columns: repeat(4, 1fr); }
.paper-style-scope .mcq-cols-2 { grid-template-columns: repeat(2, 1fr); }
.paper-style-scope .mcq-cols-1 { grid-template-columns: repeat(1, 1fr); }
.paper-style-scope .mcq-item { 
    display: flex; 
    align-items: flex-start;
}

.block-wrapper { position: relative; width: 100%; }
.block-wrapper:hover { background-color: rgba(59, 130, 246, 0.03); }

.resize-handle {
    height: 5px;
    width: 100%;
    position: absolute;
    bottom: 0;
    left: 0;
    cursor: ns-resize;
    z-index: 50;
}
.block-wrapper:hover .resize-handle { background: rgba(0,0,0,0.05); }
.resize-handle:hover, .resize-handle.active { background: #3b82f6 !important; height: 8px; }

.force-break-indicator {
    position: absolute;
    right: -30px;
    top: 50%;
    color: red;
    font-size: 14px;
    display: none;
}
.block-wrapper.forced-break .force-break-indicator { display: block; }

#measure-jail {
    position: absolute;
    top: 0; left: 0;
    width: 170mm;
    z-index: -999;
    visibility: hidden;
    background: white;
}

/* =========================================
    3. 打印专用样式
    ========================================= */
@page { size: A4 portrait; margin: 0; }
@media print {
    body, html, #app, #app-main, .preview-container {
        height: auto !important;
        overflow: visible !important;
        background: white !important;
        display: block !important;
        position: static !important;
    }
    #app-header, #app-editor-panel, .resize-handle, .force-break-indicator, ::-webkit-scrollbar {
        display: none !important;
    }
    .w-3\/5 { width: 100% !important; margin: 0 !important; padding: 0 !important; }
    .a4-page {
        margin: 0 !important;
        box-shadow: none !important;
        border: none !important;
        break-after: page;
        page-break-after: always;
    }
    .a4-page:last-child { break-after: auto; }
}