:root {
    --main-bg-color: #ffffff;
    --main-text-color: #212529;
    --secondary-bg-color: #00aaff;
    --secondary-text-color: #ffffff;
    --accent-color: #ff5722;
    --footer-bg-color: #00aaff;
}

[data-theme="dark"] {
    --main-bg-color: #121212;
    --main-text-color: #e0e0e0;
    --secondary-bg-color: #1f78b4;
    --secondary-text-color: #ffffff;
    --accent-color: #ff9800;
    --footer-bg-color: #1f78b4;
}

body {
    background-color: var(--main-bg-color);
    color: var(--main-text-color);
    transition: background-color 0.3s, color 0.3s;
}
 a:hover{
    color: var(--accent-color);
 }

 h1{
  text-align: center!important;
  margin-top:1.5rem!important;
  margin-bottom:1.5rem!important;
  font-weight: 700!important;
 }

h2, h3{
    margin-top:1rem!important;
    margin-bottom:1rem!important;
    font-weight: 700!important;
 }

 @media (min-width: 1200px) {  
      main.container {  
        max-width: 1140px !important;  
      }  
    }

.lead{
    color: var(--main-text-color) !important;
}

.navbar {
    background-color: #2c3e50;
    color: var(--secondary-text-color);
}

.navbar a.nav-link {
    color: var(--secondary-text-color);
    transition: color 0.3s;
}

.navbar a.nav-link:hover {
    color: var(--accent-color);
}

.nav-link.active {
  color: #ffc107 !important; /* 选中时的文字颜色 */
  font-weight: bold; /* 选中时加粗 */
}

.nav-link.active:hover {
  color: var(--accent-color) !important;
}

/* 二级菜单样式 */
.nav-dropdown-menu {
    display: none; /* 默认隐藏 */
    position: absolute;
    left: 0;
    top: 100%;
    background-color: #2c3e50;
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 0;
    min-width: 200px;
}

.nav-dropdown-menu a {
    color: var(--secondary-text-color);
    padding: 10px 20px;
    text-decoration: none;
    display: block;
    transition: background-color 0.3s, color 0.3s;
}

.nav-dropdown-menu a:hover {
    background-color: var(--accent-color);
    color: #fff;
}

/* 二级菜单选中样式 */
.nav-dropdown-menu a.active {
    color: #ffc107; /* 选中时的文字颜色 */
    font-weight: bold; /* 选中时加粗 */
}

.nav-dropdown-menu a.active:hover {
    color: #fff; /* 悬停时文字颜色 */
    background-color: var(--accent-color);
}

.nav-item:hover > .nav-dropdown-menu {
    display: block; /* 鼠标悬停时显示二级菜单 */
}

/* 响应式处理 */
@media (max-width: 768px) {
    .nav-dropdown-menu {
        position: relative;
        display: block;
    }
}

.btn:hover {
    background-color: var(--accent-color)!important;
    border-color: var(--accent-color)!important;
}

.area-section {
        background-color: var(--main-bg-color);
        border-radius: 10px;
        padding: 1rem;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    .icon-group button {
        background-color: var(--secondary-text-color);
        border: none;
        border-radius: 50%;
        transition: background-color 0.3s ease, transform 0.3s ease;
    }

    .icon-group button:hover {
        background-color: var(--accent-color);
        transform: scale(1.1);
        color: #fff;
    }

    textarea {
        resize: none;
        background-color: var(--secondary-bg-color);
        color: var(--text-color);
        border: 1px solid var(--border-color);
        border-radius: 5px;
        padding: 10px;
    }

    textarea:focus {
        outline: none;
        border-color: var(--accent-color);
        box-shadow: 0 0 5px var(--accent-color);
    }

    .upload-box {
    background-color: var(--main-bg-color);
    border: 1px dashed var(--secondary-bg-color); /* 虚线边框 */
    border-radius: 10px;
    padding: 2rem;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
    position: relative; /* 使边框更直观 */
}

.upload-box:hover {
    background-color: var(--accent-color-light);
    transform: scale(1.02);
    color: var(--text-color-light);
    border-color: var(--accent-color); /* 鼠标悬停时高亮边框 */
}

.upload-box i {
    color: var(--accent-color);
    font-size: 3rem;
    transition: color 0.3s ease;
}

.upload-box:hover i {
    color: var(--text-color-light);
}

.upload-box p {
    font-size: 1.1rem;
    margin-top: 0.5rem;
    color: var(--text-color);
}

.upload-box.dragging {
    background-color: var(--accent-color-light);
    border-color: var(--accent-color); /* 拖拽时高亮虚线边框 */
    transform: scale(1.05);
}

.footer {
    background-color: #2c3e50;
    color: var(--secondary-text-color);
}

.footer a {
    color: var(--secondary-text-color);
    text-decoration: none;
    transition: color 0.3s;
}

.footer a:hover {
    color: var(--accent-color);
}

.footer h5 {
    color: var(--secondary-accent-color);
}

.social-icons a {
    font-size: 1.5rem;
    margin-right: 15px;
    color: var(--main-text-color);
    transition: color 0.3s;
}

.social-icons a:hover {
    color: var(--accent-color);
}

.share-icons a {
    font-size: 1.8rem;
    margin-right: 10px;
    color: var(--secondary-bg-color);
    transition: color 0.3s;
}

.share-icons a:hover {
    color: var(--accent-color);
}

.hover-img {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-img:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.card{
  padding: 1rem!important;
  border: 1px solid var(--secondary-bg-color);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease-in-out;
}

.card h5 {
    transition: color 0.3s;
    font-weight: 700!important;
}

.card:hover h5 {
    color: var(--accent-color);
}

.callout {
    background: linear-gradient(135deg, rgba(0, 174, 255, 0.1), rgba(255, 87, 34, 0.1));
    border-left: 5px solid var(--secondary-bg-color); /*accent-color*/
    padding: 1rem!important;
    margin-bottom: 1rem!important;
    border-radius: var(--bs-border-radius)!important;
    align-items: center!important;
    box-shadow: var(--bs-box-shadow-sm)!important;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

[data-theme="dark"] .callout {
    background: linear-gradient(135deg, rgba(31, 120, 180, 0.2), rgba(255, 152, 0, 0.2));
    border-left-color: var(--accent-color);
}

[data-theme="dark"] .callout .card-body * {
    color: var(--main-text-color) !important;
}

.callout:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.text-bright {
    /*font-family: "Courier New", Courier, monospace;*/
    color: var(--accent-color);
}

.callout-btn {
    background-color: var(--secondary-bg-color);
    color: var(--secondary-text-color);
    border: none;
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.callout-btn:hover {
    background-color: var(--accent-color);
    color: var(--secondary-text-color);
    transform: scale(1.1);
}

.callout-btn i {
    font-size: 1.2rem;
}

.border-left {
    background-color: var(--main-bg-color);
    border-left: 5px solid var(--secondary-bg-color);
    padding: 1rem!important;
    margin-bottom: 1rem!important;
    /*border-radius: var(--bs-border-radius)!important;*/
    box-shadow: var(--bs-box-shadow-sm)!important;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.border-left:hover {
    transform: translateY(-5px);
    color: var(--accent-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.faq-list .faq-item {
    background-color: var(--main-bg-color);
    border-left: 5px solid var(--secondary-bg-color);
    padding: 1rem!important;
    margin-bottom: 1rem!important;
    border-radius: var(--bs-border-radius)!important;
    box-shadow: var(--bs-box-shadow-sm)!important;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.faq-list .faq-item:hover {
    transform: translateY(-5px);
    color: var(--accent-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.faq-card {
    background-color: var(--main-bg-color);
    border: 1px solid var(--secondary-bg-color);
    border-radius: var(--bs-border-radius)!important;
    padding:1.5rem!important ;
    box-shadow: var(--bs-box-shadow-sm)!important;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.faq-card:hover {
    transform: translateY(-5px);
    color: var(--accent-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.faq-question {
    font-weight: 600!important;
    margin-bottom: .5rem!important;
}

.faq-answer {
    color: var(--text-color);
}

.question-options{
    min-width: 120px;
    border-radius: 20px;
    font-weight: 700!important;
}

/* 添加过渡效果 */
#practiceArea {
  opacity: 0;
  display: none;
  transition: opacity 0.5s ease-in-out, visibility 0.5s ease-in-out;
}

#practiceArea.show {
  opacity: 1;
  display: block;
}

.modal-content {
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* 自定义 CSS，确保视频宽度设置为100% */
.embed-responsive {
  position: relative;
  height: 0;
  overflow: hidden;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  max-width: 100%;
  width: 100%;
}

.embed-responsive iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.div-input {
    color: var(--bs-body-color);
    background-color: var(--bs-body-bg);
    border: var(--bs-border-width) solid var(--bs-border-color);
    border-radius: 5px;
    min-height: 100px;
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    padding: 10px;
    margin-top: 15px;
}

.div-input:focus {
    color: var(--bs-body-color);
    background-color: var(--bs-body-bg);
    outline: 0;
    border-color: #86b7fe;;
    box-shadow: 0 0 0 .25rem rgba(13,110,253,.25)
}

.image-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 10px;
}

.image-icon {
  width: 50px;
  height: 50px;
  cursor: pointer;
  margin: 5px;
}

.range-labels {
    display: flex;
    justify-content: space-between;
    margin-top: -10px;
}

.option-img {
  width: 150px;
  height: 25px;
  object-fit: contain;
  margin-right: 10px;
  vertical-align: middle;
}

.top-btn {
    position: relative;
    z-index: 2;
}

/* 让 input[type="color"] 处于下层 */
.color-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    z-index: 1;
}

.range-container {
    position: absolute;
    top: 100%; /* 让范围选择器出现在按钮下方 */
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    background: white;
    padding: 8px;
    border-radius: 5px;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.2);
    display: none; /* 默认隐藏 */
    z-index: 3;
}

/*数字华容道----start*/
#gameContainer {
    min-height: 300px;
    overflow: auto;
    padding: 15px;
    width: 100%;
    max-width: 100vw; /* 防止溢出屏幕 */
    box-sizing: border-box;
}

#loading {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 9999;
    background: rgba(255,255,255,0.9);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0,0,0,0.2);
}

#gameWrapper {
    background: var(--main-bg-color);
    border-radius: 10px;
    padding: 15px;
    margin: 0 auto;
    /*box-shadow: 0 10px 30px rgba(0,0,0,0.2);*/
}

.tile {
    background: linear-gradient(145deg, #ffffff, #dfe6e9);
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1),
                inset 0 -2px 2px rgba(0,0,0,0.1),
                inset 0 1px 1px rgba(255,255,255,0.5);
    transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 700;
    color: #2c3e50;
    text-shadow: 0 1px 1px rgba(255,255,255,0.5);
    border: 2px solid #fff;
}

.tile[data-value="0"] {
    background: linear-gradient(145deg, #bdc3c7, #95a5a6);
    box-shadow: inset 0 3px 6px rgba(0,0,0,0.1);
    border-color: #95a5a6;
}

/* 添加统计样式 */
.stat-box {
    background: var(--main-bg-color);
    border-radius: 8px;
    padding: 8px 15px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    font-size: 1.1em;
}

@media (max-width: 576px) {
    #gameContainer {
        padding: 8px;
    }
    
    .tile {
        font-size: 1.2em !important; /* 手机端字体放大 */
    }
}
/*数字华容道----end*/

/*不等式----start*/
/* 新增游戏特定样式 */
.game-cell {
  width: 50px;
  height: 50px;
  border: 2px solid var(--secondary-bg-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  background-color: var(--main-bg-color);
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
}

.game-cell input {
  width: 100%;
  height: 100%;
  border: none;
  text-align: center;
  background: transparent;
  color: var(--main-text-color);
}

.inequality-hover, .inequality {
  width: 25px;
  color: var(--accent-color);
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
}

.inequality-vertical{
    width: 50px !important;
    min-height: 20px;
}

.inequality-blank{
    width: 25px;
}

.inequality-hover:hover{
    cursor: pointer;
    background: var(--secondary-bg-color);
}

@media (max-width: 768px) {
  .game-cell {
      width: 35px;
      height: 35px;
      font-size: 1rem;
  }
  .inequality-hover, .inequality {
      width: 20px;
  }

  .inequality-vertical{
    width: 35px !important;
    min-height: 20px;
  }

  .inequality-blank{
        width: 20px;
    }
}

      /* 强制换行 */
#gameBoard {
    display: block !important; /* 覆盖Bootstrap的flex */
}

.row-wrapper {
    display: flex;
    flex-wrap: nowrap;
    width: 100%;
}

.game-cell.valid {
    background-color: rgba(0, 255, 0, 0.1);
    border-color: #28a745 !important;
}

.game-cell.invalid {
    background-color: rgba(255, 0, 0, 0.1);
    border-color: #dc3545 !important;
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* 虚拟键盘样式 */
.virtual-keyboard {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--main-bg-color);
    border-top: 2px solid var(--secondary-bg-color);
    z-index: 1000;
    transition: transform 0.3s ease;
}

.virtual-keyboard.collapsed {
    transform: translateY(calc(100% - 40px)); /* 只保留标题栏 */
}

.keyboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 15px;
    background: var(--secondary-bg-color);
    color: var(--secondary-text-color);
}

.toggle-btn {
    background: none;
    border: none;
    color: inherit;
    font-size: 1.2em;
    padding: 0 10px;
    cursor: pointer;
}

.keyboard-body {
    padding: 10px;
    display: grid;
    gap: 5px;
    justify-content: center;
}

/* 动态列数计算（示例N=9时显示5列） */
.keyboard-body {
    grid-template-columns: repeat(5, 1fr);
}

@media (max-width: 768px) {
    /* 移动端显示3列 */
    .keyboard-body {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 按钮尺寸优化 */
.keyboard-btn {
    min-width: 50px;
    height: 50px;
    padding: 0;
    margin: 2px;
    padding: 15px;
    border: 2px solid var(--secondary-bg-color);
    border-radius: 8px;
    text-align: center;
    font-weight: bold;
    background: var(--main-bg-color);
    color: var(--main-text-color);
    transition: all 0.2s ease;
    cursor: pointer;
}

.cell-value {
    transition: transform 0.2s ease;
    font-weight: bold;
}

.game-cell.selected{
    transform: scale(1.2);
}

/* 解决值样式 */
.solved-value {
    color: #28a745;
    font-weight: bold;
    animation: fadeIn 0.5s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 禁用按钮样式 */
#solveBtn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
/*不等式----end*/

/*sumplete----start*/
.plete-game-grid {
    --size: 4; /* 通过行内样式动态修改 */
    --gap: 0;
    --columns: calc(var(--size) + 1);
    display: grid;
    grid-template-columns: repeat(var(--columns), 1fr);
    padding: 1px;
    margin: 20px auto;
    width: min(
        calc(100% - 2px), /* 防止父容器padding影响 */
        calc((70px) * var(--columns)) /* 最大尺寸限制 */
    );
    grid-auto-rows: min-content; /* 关键修复：行高自适应 */
    min-height: 0; /* 允许内容压缩 */
}

.plete-grid-cell, .plete-target-cell{
    position: relative;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    /*
    width: clamp(40px, 8vw, 60px);
    height: clamp(40px, 8vw, 60px);
    font-size: clamp(14px, 2.5vw, 25px);
    */
    /* 动态尺寸计算 */
    width: calc(
        calc((100% - var(--gap)*(var(--columns) - 1)) / var(--columns))
    );
    height: calc(
        calc((100% - var(--gap)*(var(--columns) - 1)) / var(--columns))
    );
    font-size: clamp(16px, 2.5vw, 25px);
    font-weight: bold;
    border: 1px solid #dee2e6;
    transition: all 0.3s ease;
    cursor: pointer;
     z-index: 2; /* 确保数字位于上层 */
}

/* 目标单元格样式 */
.plete-target-cell {
    background: #f8f9fa !important;
    color: #b0b1b3 !important;
    transition: all 0.3s ease;
    cursor:default;
    min-height: 0; /* 允许内容压缩 */
    height: 100%;
    overflow: hidden; /* 防止内容溢出 */
    /*line-height: 1.2;  紧凑行高 */
}

/* 删除状态优化 */
.plete-grid-cell.removed {
    background: #fff5f5;
    border-right-color: #ff6b6b;
}
.plete-grid-cell.removed::before {
    content: "✕";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    color: #ff6b6b;
    font-size: 2.2em;
    filter: drop-shadow(0 2px 2px rgba(0,0,0,0.1));
    opacity: 0.3; /* 半透明效果 */
    z-index: 1; /* 置于底层 */
    pointer-events: none; /* 避免遮挡点击事件 */
    padding: inherit;
}

.plete-grid-cell.selected {
    background: #e8f8f0;
    border-right-color: #2ecc71;
}

/* 选中状态优化 */
.plete-grid-cell.selected::after {
     content: "√";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    color: #2ecc71;
    font-size: 2.2em;
    filter: drop-shadow(0 2px 2px rgba(0,0,0,0.1));
    opacity: 0.3; /* 半透明效果 */
    z-index: 1; /* 置于底层 */
    pointer-events: none; /* 避免遮挡点击事件 */
    padding: inherit;
}

/* 隐藏右下角空单元格 */
.plete-game-grid > div:last-child:empty {
    display: none;
}
/*sumplete----end*/

/*隐藏input type number 上下调整按钮*/
.no-spinners {
  -moz-appearance: textfield; /* Firefox */
}

.no-spinners::-webkit-inner-spin-button,
.no-spinners::-webkit-outer-spin-button {
  -webkit-appearance: none; /* Chrome, Safari */
  margin: 0;
}

/*24 点----start*/
.number-card {
    background: var(--secondary-bg-color);
    border: 1px solid var(--secondary-bg-color);
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: 700;
    color: var(--secondary-text-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.operator-buttons {
    margin-top: 2rem;
    gap: 0.5rem;
    justify-content: center;
}

.operator-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%!important;
    font-size: 1.8rem;
    background-color: var(--secondary-bg-color);
    color: var(--secondary-text-color);
    font-weight: 700;
    border: none;
    transition: all 0.3s ease;
}

.operator-btn:hover {
    transform: scale(1.1);
    background-color: var(--accent-color);
}

.operator-btn.selected, .number-card.selected {
    background-color: #74b9ff !important;
    color: white !important;
}

.result-display {
    font-size: 1.5rem;
    min-height: 60px;
    border: 2px dashed var(--secondary-bg-color);
    border-radius: 10px;
    padding: 10px 20px;
    margin: 1rem 0;
}

@media (max-width: 576px) {
    .number-card {
         height: 120px;
    }
}
/*24 点----end*/


/*数独----start*/
.sudoku-grid {
    display: grid;
    gap: 0px;
    background: #ffffff;
    border: 2px solid var(--secondary-bg-color);
    overflow: hidden;
    /* 核心改动 1: 限制网格最大宽度，并居中，防止在PC端过分拉伸 */
    margin-left: auto;
    margin-right: auto;
    /* 默认给一个适合九宫格的宽度 */
   width: 100%;              /* ? 宽度自适应父容器 */
   max-width: 100%;
    aspect-ratio: 1;
    box-sizing: border-box;
}

.sudoku-cell {
    position: relative;
    aspect-ratio: 1;
    background: var(--secondary-text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--accent-color);
    /* 核心改动 2: 使用CSS变量和clamp()函数定义动态字体大小 */
    /* clamp(最小值, 理想值, 最大值) */
    font-size: var(--cell-font-size, clamp(1rem, 3vw, 2.8rem));
}

/* 4x4 网格: 单元格最大，字体也应该最大 */
.sudoku-grid[data-size="4"] .sudoku-cell {
    --cell-font-size: clamp(2rem, 10vw, 4rem);
}

/* 6x6 网格 */
.sudoku-grid[data-size="6"] .sudoku-cell {
    --cell-font-size: clamp(1.6rem, 7vw, 3.5rem);
}

/* 8x8 网格 */
.sudoku-grid[data-size="8"] .sudoku-cell {
    --cell-font-size: clamp(1.4rem, 5vw, 3rem);
}

.sudoku-grid[data-size="9"] .sudoku-cell {
    --cell-font-size: clamp(1rem, 3vw, 2.8rem);
}

.sudoku-grid-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 650px;       /* ✅ 这里才是控制PC端最大宽度的地方 */
    margin: 0 auto;
    overflow: hidden;
    padding: 0;
    box-sizing: border-box;
}

.sudoku-grid-wrapper[data-size="4"] {
    max-width: 450px;
}

.sudoku-grid-wrapper[data-size="6"] {
    max-width: 550px;
}

.sudoku-grid-wrapper[data-size="8"],
.sudoku-grid-wrapper[data-size="9"] {
    max-width: 650px;
}

.sudoku-cell.initial {
    color: var(--secondary-bg-color);
    font-weight: 800;
}

.sudoku-cell.highlight {
    background: rgba(0, 170, 255, 0.1)!important;
    transition: background 0.2s ease;
}

.sudoku-cell.selected {
    background: rgba(0, 170, 255, 0.5)!important;
    z-index: 1; /* 防止边框被遮挡 */
}

.sudoku-cell.conflict {
    background: rgba(255, 87, 34, 0.2)!important;
    color: #dc3545;
}

.sudoku-num-pad {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 5px;
}

.sudoku-num-btn {
    aspect-ratio: 1;
    font-weight: 700;
    background: var(--secondary-bg-color);
    color: var(--secondary-text-color);
    transition: all 0.2s ease;
    padding: 1px;
    font-size: clamp(1.4rem, 2.5vw, 2rem);
}

.sudoku-num-btn:hover {
    background: var(--accent-color);
    transform: scale(1.05);
}

.sudoku-action {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.sudoku-action i {
  pointer-events: none;/* 防止图标阻挡点击 */
}

/* 添加暂停遮罩样式 */
.sudoku-pause {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    z-index: 100; /* 确保在单元格上方 */
}

.sudoku-pause.show {
    display: flex;
}

.sudoku-resume {
    font-size: min(50vw, 150px); /* 自适应大小 */
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
    pointer-events: none; /* 防止图标阻挡点击 */
}

/* 标注模式 */
.sudoku-cell.note-mode {
    /*background: rgba(255, 255, 0, 0.1) !important;*/
}

.sudoku-note-nums {
    position: absolute;
    top: 1px;
    left: 1px;
    right: 1px;
    bottom: 1px;
    display: grid;
    font-size: clamp(8px, 1.5vw, 12px);
    padding: 2px;
    gap: 1px;
}

/* 4x4 特殊样式 */
.sudoku-grid[data-size="4"] .sudoku-note-nums {
    --note-columns: 2; /* 2x2网格 */
}

.sudoku-grid[data-size="4"] .sudoku-note-num {
    font-size: clamp(12px, 2vw, 18px);
}

.sudoku-note-num {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
}

@media (max-width: 768px) {
    .sudoku-grid[data-size="8"] .sudoku-note-nums {
        font-size: clamp(6px, 1.5vw, 14px); /* 8宫格标注中等 */
    }
    
    .sudoku-grid[data-size="9"] .sudoku-note-nums {
        font-size: clamp(5px, 1vw, 12px); /* 9宫格标注最小 */
    }
}
/*数独-----end*/