/* 模拟考试试卷样式 - 全屏布局 */

/* ========== 主题变量系统 ========== */
:root {
    /* 默认主题 - 传统试卷风格 */
    --exam-bg: #FFFEF5;
    --exam-bg-solid: #FFFEF5;
    --exam-container-bg: #FFFEF5;
    --exam-border: #333;
    --exam-text: #000;
    --exam-text-secondary: #333;
    --exam-text-muted: #666;
    --exam-header-bg: #FFFEF5;
    --exam-header-border: #333;
    --exam-section-border: #ccc;
    --exam-column-border: #999;
    --exam-input-bg: transparent;
    --exam-input-border: #333;
    --exam-input-border-focus: #333;
    --exam-input-correct: #4CAF50;
    --exam-input-correct-text: #4CAF50;
    --exam-input-incorrect: #f44336;
    --exam-input-incorrect-text: #f44336;
    --exam-btn-bg: #fff;
    --exam-btn-border: #333;
    --exam-btn-text: #333;
    --exam-btn-hover-bg: #f5f5f5;
    --exam-btn-primary-bg: #333;
    --exam-btn-primary-text: #fff;
    --exam-btn-primary-hover-bg: #555;
    --exam-close-btn-bg: #fff;
    --exam-close-btn-border: #333;
    --exam-close-btn-hover-bg: #f0f0f0;
    --exam-scrollbar-track: #FFFEF5;
    --exam-scrollbar-thumb: #e8e7dc;
    --exam-scrollbar-thumb-hover: #d4d3c8;
    --exam-scrollbar-thumb-active: #aaa9a0;
    --exam-shadow: none;
    --exam-container-shadow: none;
    --exam-btn-shadow: none;
    --exam-border-radius: 0;
    --exam-container-border-radius: 0;
    --exam-input-border-width: 1px;
    --exam-line-bg: rgba(80, 80, 80, 0.4);
    --exam-bubble-opacity: 0;
}

/* 新拟态主题 - 首页风格（平面样式） */
.exam-theme-neumorphism {
    --exam-bg: #e3edf7;
    --exam-bg-solid: #e3edf7;
    --exam-container-bg: #e3edf7;
    --exam-border: transparent;
    --exam-text: #4a6fa5;
    --exam-text-secondary: #5d8ab8;
    --exam-text-muted: #7aa8d6;
    --exam-header-bg: #e3edf7;
    --exam-header-border: rgba(93, 138, 184, 0.3);
    --exam-section-border: rgba(93, 138, 184, 0.3);
    --exam-column-border: rgba(93, 138, 184, 0.2);
    --exam-input-bg: transparent;
    --exam-input-border: rgba(93, 138, 184, 0.5);
    --exam-input-border-focus: rgba(93, 138, 184, 0.6);
    --exam-input-correct: rgba(40, 167, 69, 0.6);
    --exam-input-correct-text: #155724;
    --exam-input-incorrect: rgba(220, 53, 69, 0.6);
    --exam-input-incorrect-text: #721c24;
    --exam-btn-bg: #5d8ab8;
    --exam-btn-border: transparent;
    --exam-btn-text: #fff;
    --exam-btn-hover-bg: #4a6fa5;
    --exam-btn-primary-bg: #5d8ab8;
    --exam-btn-primary-text: #fff;
    --exam-btn-primary-hover-bg: #4a6fa5;
    --exam-close-btn-bg: rgba(93, 138, 184, 0.2);
    --exam-close-btn-border: transparent;
    --exam-close-btn-hover-bg: rgba(93, 138, 184, 0.3);
    --exam-scrollbar-track: #e3edf7;
    --exam-scrollbar-thumb: #d0e2f0;
    --exam-scrollbar-thumb-hover: #eaf4fc;
    --exam-scrollbar-thumb-active: #c5dcea;
    --exam-shadow: none;
    --exam-container-shadow: none;
    --exam-btn-shadow: none;
    --exam-border-radius: 0;
    --exam-container-border-radius: 0;
    --exam-input-border-width: 2px;
    --exam-line-bg: rgba(93, 138, 184, 0.5);
    --exam-bubble-opacity: 1;
}

/* ========== 浮动气泡装饰 ========== */
.exam-bubbles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
    opacity: var(--exam-bubble-opacity);
    transition: opacity 0.5s ease;
}

.exam-bubble {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.8), rgba(173, 216, 230, 0.3));
    animation: examBubbleFloat 20s ease-in-out infinite;
}

.exam-bubble.bubble-1 {
    width: 150px;
    height: 150px;
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.exam-bubble.bubble-2 {
    width: 100px;
    height: 100px;
    top: 60%;
    left: 15%;
    animation-delay: -5s;
}

.exam-bubble.bubble-3 {
    width: 80px;
    height: 80px;
    top: 30%;
    right: 10%;
    animation-delay: -10s;
}

.exam-bubble.bubble-4 {
    width: 120px;
    height: 120px;
    top: 70%;
    right: 20%;
    animation-delay: -15s;
}

.exam-bubble.bubble-5 {
    width: 60px;
    height: 60px;
    top: 20%;
    left: 50%;
    animation-delay: -7s;
}

@keyframes examBubbleFloat {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-20px) rotate(5deg);
    }
    50% {
        transform: translateY(0) rotate(0deg);
    }
    75% {
        transform: translateY(20px) rotate(-5deg);
    }
}

/* 考试覆盖层 - 自定义滚动条 */
.exam-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--exam-bg);
    z-index: 10003;
    display: none;
    overflow: auto;
    /* Firefox 滚动条样式 - 使用 !important 覆盖全局样式 */
    scrollbar-width: auto !important;
    scrollbar-color: var(--exam-scrollbar-thumb) var(--exam-scrollbar-track) !important;
}

/* 考试入场动画 - 准备状态 */
.exam-overlay.exam-preparing .exam-container {
    opacity: 0;
}

/* 考试入场动画 - 进入状态 */
.exam-overlay.exam-entering .exam-container {
    animation: examFadeIn 0.8s ease-out 0.2s both;
}

@keyframes examFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 提交后才允许选中文字 - 通过 JS 动态添加 .exam-selectable 类 */
.exam-overlay.exam-selectable *,
.exam-overlay.exam-selectable .exam-content,
.exam-overlay.exam-selectable .exam-content *,
.exam-overlay.exam-selectable .exam-article,
.exam-overlay.exam-selectable .exam-article *,
.exam-overlay.exam-selectable .exam-summary,
.exam-overlay.exam-selectable .exam-summary *,
.exam-overlay.exam-selectable .exam-section,
.exam-overlay.exam-selectable .exam-explanation,
.exam-overlay.exam-selectable .exam-explanation *,
.exam-overlay.exam-selectable .exam-correct-answer {
    -webkit-user-select: text !important;
    user-select: text !important;
}

/* 页眉区域保持不可选中（避免触发浏览器工具栏） */
.exam-overlay.exam-selectable .exam-header,
.exam-overlay.exam-selectable .exam-header *,
.exam-overlay.exam-selectable .exam-footer,
.exam-overlay.exam-selectable .exam-footer * {
    -webkit-user-select: none !important;
    user-select: none !important;
}

/* 输入框和按钮保持不可选中 */
.exam-overlay input,
.exam-overlay textarea,
.exam-overlay button {
    -webkit-user-select: none !important;
    user-select: none !important;
}

/* 考试界面滚动条样式 - WebKit浏览器 */
.exam-overlay::-webkit-scrollbar {
    width: 12px !important;
    height: 12px !important;
}

.exam-overlay::-webkit-scrollbar-track {
    background: var(--exam-scrollbar-track) !important;
    border-radius: 0 !important;
}

.exam-overlay::-webkit-scrollbar-thumb {
    background: var(--exam-scrollbar-thumb) !important;
    border-radius: 0 !important;
    border: none !important;
}

.exam-overlay::-webkit-scrollbar-thumb:hover {
    background: var(--exam-scrollbar-thumb-hover) !important;
}

.exam-overlay::-webkit-scrollbar-thumb:active {
    background: var(--exam-scrollbar-thumb-active) !important;
}

.exam-overlay::-webkit-scrollbar-corner {
    background: var(--exam-scrollbar-track) !important;
}

.exam-overlay.active {
    display: block;
}

/* 考试容器 - 全屏 */
.exam-container {
    width: calc(100% - 40px);
    min-height: calc(100vh - 40px);
    margin: 20px;
    background: var(--exam-container-bg);
    border: 2px solid var(--exam-border);
    border-radius: var(--exam-container-border-radius);
    box-shadow: var(--exam-container-shadow);
    position: relative;
    z-index: 1;
}

/* 考试头部 */
.exam-header {
    background: var(--exam-header-bg);
    border-bottom: 2px solid var(--exam-header-border);
    padding: 15px 30px;
    text-align: center;
    position: relative;
    -webkit-user-select: none;
    user-select: none;
}

/* 主题切换按钮 - 默认方形 */
.exam-theme-toggle-btn {
    position: absolute;
    top: 12px;
    right: 52px;
    width: 34px;
    height: 34px;
    border: 1px solid var(--exam-btn-border);
    background: var(--exam-close-btn-bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s ease;
    border-radius: 0;
    z-index: 10;
    color: var(--exam-text-secondary);
}

.exam-theme-toggle-btn:hover {
    background: var(--exam-close-btn-hover-bg);
    border-color: var(--exam-text-secondary);
}

.exam-theme-toggle-btn:active {
    transform: scale(0.95);
}

.exam-theme-toggle-btn .theme-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.exam-theme-toggle-btn .sun-icon,
.exam-theme-toggle-btn .moon-icon {
    transition: opacity 0.2s ease;
}

/* 新拟态主题下的按钮样式 - 圆角方形 */
.exam-theme-neumorphism .exam-theme-toggle-btn {
    width: 38px;
    height: 38px;
    border: none;
    background: rgba(93, 138, 184, 0.15);
    color: #5d8ab8;
    border-radius: 8px;
}

.exam-theme-neumorphism .exam-theme-toggle-btn:hover {
    background: rgba(93, 138, 184, 0.25);
}

/* 关闭按钮 - 默认方形 */
.exam-close-btn {
    position: absolute;
    top: 12px;
    right: 14px;
    width: 32px;
    height: 32px;
    border: 1px solid var(--exam-close-btn-border);
    background: var(--exam-close-btn-bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    border-radius: 0;
    color: var(--exam-text-secondary);
}

.exam-close-btn:hover {
    background: var(--exam-close-btn-hover-bg);
    border-color: var(--exam-text-secondary);
}

.exam-close-btn:active {
    transform: scale(0.95);
}

/* 新拟态主题下的关闭按钮样式 - 圆角方形 */
.exam-theme-neumorphism .exam-close-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(93, 138, 184, 0.15);
    color: #5d8ab8;
    border-radius: 8px;
}

.exam-theme-neumorphism .exam-close-btn:hover {
    background: rgba(93, 138, 184, 0.25);
}


.exam-title {
    font-size: 22px;
    font-weight: bold;
    color: var(--exam-text);
    margin-bottom: 8px;
    letter-spacing: 4px;
}

.exam-info {
    font-size: 14px;
    color: var(--exam-text-secondary);
}

.exam-info span {
    margin: 0 15px;
}

/* 考试时间样式 */
.exam-timer {
    display: inline-flex;
    align-items: baseline;
}

.exam-timer-label {
    color: var(--exam-text-muted);
}

.exam-timer-value {
    font-family: 'Courier New', Consolas, monospace;
    font-size: 18px;
    font-weight: bold;
    color: var(--exam-text-secondary);
    margin-left: 4px;
}

/* 试卷主体 - 左右两栏 */
.exam-paper {
    display: flex;
    min-height: calc(100vh - 200px);
    position: relative;
}

/* ========== 复古倒计时时钟 ========== */
.exam-clock {
    position: absolute;
    top: 50%;
    right: 310px;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
}

.exam-clock-face {
    width: 80px;
    height: 80px;
    border: 3px solid var(--exam-border);
    border-radius: 50%;
    background: var(--exam-container-bg);
    position: relative;
    box-shadow: 
        inset 0 0 15px rgba(0,0,0,0.04),
        0 4px 12px rgba(0,0,0,0.1);
}

/* 时钟刻度 */
.exam-clock-marks {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.exam-clock-marks::before,
.exam-clock-marks::after {
    content: '';
    position: absolute;
    background: var(--exam-border);
}

/* 12点刻度 */
.exam-clock-marks::before {
    width: 2px;
    height: 8px;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
}

/* 6点刻度 */
.exam-clock-marks::after {
    width: 2px;
    height: 8px;
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%);
}

/* 时钟指针 */
.exam-clock-hand {
    position: absolute;
    bottom: 50%;
    left: 50%;
    transform-origin: bottom center;
    background: var(--exam-border);
    border-radius: 1.5px;
    transition: transform 1s linear;
}

/* 分针 - 表示剩余分钟 */
.exam-clock-hand.minute-hand {
    width: 2px;
    height: 28px;
    margin-left: -1px;
}

/* 时针 - 表示剩余小时比例 */
.exam-clock-hand.hour-hand {
    width: 3px;
    height: 20px;
    margin-left: -1.5px;
    background: var(--exam-text-secondary);
}

/* 时钟中心点 */
.exam-clock-center {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--exam-border);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
}

/* 数字显示区域 */
.exam-clock-display {
    position: absolute;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
}

.exam-clock-time {
    display: block;
    font-family: 'Courier New', Consolas, monospace;
    font-size: 11px;
    font-weight: bold;
    color: var(--exam-text-secondary);
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

/* 新拟态主题时钟 */
.exam-theme-neumorphism .exam-clock-face {
    background: linear-gradient(145deg, #ecf4fc, #dbe7f5);
    border-color: rgba(93, 138, 184, 0.4);
    box-shadow: 
        6px 6px 12px rgba(74, 111, 165, 0.15),
        -6px -6px 12px rgba(255, 255, 255, 0.8);
}

.exam-theme-neumorphism .exam-clock-hand.minute-hand {
    background: #5d8ab8;
}

.exam-theme-neumorphism .exam-clock-hand.hour-hand {
    background: #7aa8d6;
}

.exam-theme-neumorphism .exam-clock-center {
    background: #5d8ab8;
}

.exam-theme-neumorphism .exam-clock-marks::before,
.exam-theme-neumorphism .exam-clock-marks::after {
    background: rgba(93, 138, 184, 0.6);
}

.exam-theme-neumorphism .exam-clock-time {
    color: #5d8ab8;
}

/* 左右两栏 - 等分屏幕宽度 */
.exam-column {
    flex: 1;
    padding: 25px 30px;
    box-sizing: border-box;
}

.exam-column.left {
    border-right: 1px solid var(--exam-column-border);
}

.exam-column.right {
    border-left: 1px solid var(--exam-column-border);
    margin-left: -1px;
}

/* 题型区块 */
.exam-section {
    margin-bottom: 35px;
}

.exam-section:last-child {
    margin-bottom: 20px;
}

.exam-section-title {
    font-size: 16px;
    font-weight: bold;
    color: var(--exam-text);
    margin-bottom: 15px;
    padding-bottom: 5px;
    border-bottom: 1px solid var(--exam-section-border);
}

/* Passage 标题样式 */
.exam-passage-title {
    font-size: 18px;
    font-weight: bold;
    color: var(--exam-text);
    text-align: center;
    margin: 25px 0 15px 0;
}

/* 题目内容 */
.exam-content {
    font-size: 15px;
    line-height: 1.9;
    color: var(--exam-text);
}

.exam-content p {
    margin: 10px 0;
    text-indent: 2em;
}

.exam-content .no-indent {
    text-indent: 0;
}

/* 文章段落 - 无边框 */
.exam-article {
    padding: 5px 0;
    margin-bottom: 15px;
}

.exam-article p {
    margin: 14px 0;
    text-indent: 2em;
    line-height: 2.2;
}

/* 填空输入框 - 横线样式 */
.exam-blank {
    display: inline-block;
    min-width: 80px;
    max-width: 200px;
    width: 80px;
    height: 24px;
    border: none;
    border-bottom: var(--exam-input-border-width) solid var(--exam-input-border);
    border-radius: 0;
    background: var(--exam-input-bg);
    font-size: 15px;
    font-family: inherit;
    font-weight: 500;
    color: var(--exam-text);
    text-align: left;
    padding: 0 6px;
    margin: 0 4px;
    outline: none;
    box-sizing: border-box;
    line-height: 20px;
    vertical-align: middle;
    transition: none;
}

.exam-blank:focus {
    border-bottom-color: var(--exam-input-border-focus);
}

.exam-blank.correct {
    border-bottom-color: var(--exam-input-correct);
    color: var(--exam-input-correct-text);
}

.exam-blank.incorrect {
    border-bottom-color: var(--exam-input-incorrect);
    color: var(--exam-input-incorrect-text);
}

/* 阅读理解分数样式 - 横线颜色 */
.exam-blank.score-zero {
    border-bottom-color: var(--exam-input-incorrect);
    color: var(--exam-input-incorrect-text);
}

.exam-blank.score-full {
    border-bottom-color: var(--exam-input-correct);
    color: var(--exam-input-correct-text);
}

/* 阅读理解输入框 - 独立宽度设置 */
.exam-blank-rc {
    min-width: 400px;
    max-width: 650px;
    width: 400px;
    text-align: left;
    padding-left: 5px;
}

/* 题号 */
.exam-number {
    font-weight: bold;
    margin-right: 5px;
}

/* 阅读填空摘要标题 */
.exam-summary-title {
    font-size: 16px;
    font-weight: bold;
    color: var(--exam-text);
    margin: 15px 0 10px 0;
    padding: 5px 0;
}

/* 阅读填空摘要区域 */
.exam-summary {
    line-height: 2;
}

.exam-summary p {
    margin: 12px 0;
}

/* 答案提示 */
.exam-hint {
    color: var(--exam-text-muted);
    font-size: 13px;
    margin-left: 3px;
}

/* 连词成句题目 - 纯文本显示 */
.exam-sentence-item {
    margin-bottom: 12px;
    padding: 3px 0;
}

.exam-sentence-words {
    font-size: 15px;
    line-height: 1.6;
    color: var(--exam-text);
    margin-bottom: 5px;
    padding: 3px 0;
}

.exam-sentence-separator {
    color: var(--exam-text-muted);
    margin: 0 3px;
}

/* 连词成句输入框 - 横线样式 */
.exam-sentence-input {
    display: block;
    width: 100%;
    max-width: 500px;
    height: 24px;
    border: none;
    border-bottom: var(--exam-input-border-width) solid var(--exam-input-border);
    border-radius: 0;
    background: var(--exam-input-bg);
    font-size: 15px;
    font-family: inherit;
    font-weight: 500;
    color: var(--exam-text);
    text-align: left;
    padding: 0 6px;
    outline: none;
    box-sizing: border-box;
    line-height: 20px;
    transition: none;
}

.exam-sentence-input:focus {
    border-bottom-color: var(--exam-input-border-focus);
}

.exam-sentence-input.correct {
    border-bottom-color: var(--exam-input-correct);
    color: var(--exam-input-correct-text);
}

.exam-sentence-input.incorrect {
    border-bottom-color: var(--exam-input-incorrect);
    color: var(--exam-input-incorrect-text);
}

/* 作文区域 - 横线背景样式 */
.exam-essay-question {
    padding: 5px 0;
    margin-bottom: 15px;
    line-height: 1.8;
}

.exam-essay-textarea {
    width: 100%;
    min-height: 300px;
    padding: 0;
    border: none;
    border-radius: 0;
    background: transparent;
    background-image: repeating-linear-gradient(
        transparent,
        transparent calc(2.5em - 1.6px),
        var(--exam-line-bg) calc(2.5em - 2px),
        var(--exam-line-bg) 2.5em
    );
    background-size: 100% 2.5em;
    font-size: 15px;
    line-height: 2.5;
    color: var(--exam-text);
    resize: none;
    overflow: hidden;
    height: auto;
    box-sizing: border-box;
    font-family: inherit;
    outline: none;
}

.exam-essay-textarea:focus {
    outline: none;
}

.exam-word-count {
    text-align: right;
    font-size: 13px;
    color: var(--exam-text-muted);
    margin-top: 5px;
}

/* 考试底部 - 随内容滚动 */
.exam-footer {
    border-top: 2px solid var(--exam-header-border);
    padding: 25px 30px;
    text-align: center;
    background: var(--exam-header-bg);
    border-radius: 0 0 var(--exam-container-border-radius) var(--exam-container-border-radius);
}

.exam-btn {
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    border: 2px solid var(--exam-btn-border);
    background: var(--exam-btn-bg);
    color: var(--exam-btn-text);
    margin: 0 10px;
    transition: all 0.2s ease;
    border-radius: 0;
}

.exam-btn:hover {
    background: var(--exam-btn-hover-bg);
}

.exam-btn:active {
    opacity: 0.9;
}

.exam-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.exam-btn.primary {
    background: var(--exam-btn-primary-bg);
    color: var(--exam-btn-primary-text);
    border-color: transparent;
}

.exam-btn.primary:hover {
    background: var(--exam-btn-primary-hover-bg);
}

/* 新拟态主题下的按钮样式 - 圆角方形 */
.exam-theme-neumorphism .exam-btn {
    border: none;
    border-radius: 8px;
    padding: 12px 36px;
}

/* 结果显示 */
.exam-result {
    display: none;
    padding: 30px;
    background: var(--exam-container-bg);
    border-top: 2px solid var(--exam-header-border);
}

.exam-result.active {
    display: block;
}

.exam-score {
    text-align: center;
    margin-bottom: 25px;
}

.exam-score-total {
    font-size: 48px;
    font-weight: bold;
    color: var(--exam-text);
}

.exam-score-label {
    font-size: 18px;
    color: var(--exam-text-muted);
    margin-top: 5px;
}

.exam-score-details {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 15px;
}

.exam-score-item {
    padding: 10px 20px;
    text-align: center;
}

.exam-score-item-title {
    font-size: 13px;
    color: var(--exam-text-muted);
    margin-bottom: 5px;
}

.exam-score-item-value {
    font-size: 18px;
    font-weight: bold;
    color: var(--exam-text-secondary);
}

/* 解析区域 - 无边框 */
.exam-explanation {
    margin-top: 25px;
}

/* 查看答案解析按钮 - 固定在得分区域下方 */
.exam-view-explanation-btn {
    width: 100%;
    padding: 18px 32px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid var(--exam-btn-border);
    background: var(--exam-btn-bg);
    color: var(--exam-btn-text);
    transition: all 0.2s ease;
    border-radius: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
    position: relative;
    overflow: hidden;
}

.exam-view-explanation-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.exam-view-explanation-btn:hover::before {
    left: 100%;
}

.exam-view-explanation-btn:hover {
    background: var(--exam-btn-hover-bg);
    transform: translateY(-2px);
}

.exam-view-explanation-btn:active {
    transform: translateY(0);
}

.exam-view-explanation-btn .btn-icon {
    font-size: 1.2em;
    transition: transform 0.3s ease;
}

.exam-view-explanation-btn.active .btn-icon {
    transform: rotate(180deg);
}

/* 新拟态主题下的查看答案解析按钮样式 */
.exam-theme-neumorphism .exam-view-explanation-btn {
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #7aa8d6, #5d8ab8);
    color: #fff;
    box-shadow: 4px 4px 12px rgba(74, 111, 165, 0.3), -4px -4px 12px rgba(255, 255, 255, 0.5);
}

.exam-theme-neumorphism .exam-view-explanation-btn::before {
    display: none;
}

.exam-theme-neumorphism .exam-view-explanation-btn:hover {
    background: linear-gradient(135deg, #5d8ab8, #4a6fa5);
    transform: translateY(-3px);
    box-shadow: 6px 6px 16px rgba(74, 111, 165, 0.4), -6px -6px 16px rgba(255, 255, 255, 0.6);
}

.exam-explanation-header {
    display: none;
}

.exam-explanation-body {
    display: none;
    animation: examExplanationFadeIn 0.3s ease-out;
}

.exam-explanation-body.active {
    display: block;
}

@keyframes examExplanationFadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 解析标签切换 */
.exam-explanation-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 15px 0;
    border-bottom: 1px solid var(--exam-section-border);
    margin-bottom: 15px;
}

.exam-tab-btn {
    padding: 8px 16px;
    font-size: 14px;
    border: 2px solid var(--exam-btn-border);
    background: var(--exam-btn-bg);
    color: var(--exam-btn-text);
    cursor: pointer;
    transition: background 0.2s ease;
    font-family: inherit;
    border-radius: var(--exam-border-radius);
}

.exam-tab-btn:hover {
    background: var(--exam-btn-hover-bg);
}

.exam-tab-btn.active {
    background: var(--exam-btn-primary-bg);
    color: var(--exam-btn-primary-text);
    border-color: transparent;
}

/* 新拟态主题下的标签按钮样式 */
.exam-theme-neumorphism .exam-tab-btn {
    border: none;
    border-radius: 15px;
    color: var(--exam-btn-text);
}

.exam-theme-neumorphism .exam-tab-btn.active {
    color: var(--exam-btn-primary-text);
}

/* 答案解析内容 - 默认主题（黑色文字） */
.exam-explanation-content {
    padding: 0;
    line-height: 1.8;
    color: #000;
}

.exam-explanation-content pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: inherit;
    margin: 0;
    color: #000;
}

.exam-explanation-content h4 {
    margin-top: 15px;
    margin-bottom: 10px;
    color: #333;
    font-size: 15px;
}

.exam-explanation-content h4:first-child {
    margin-top: 0;
}

.exam-explanation-content p {
    margin: 8px 0;
    color: #000;
}

.exam-explanation-content .no-content {
    color: #666;
    font-style: italic;
    text-align: center;
    padding: 20px;
}

/* 答案解析内容 - 新拟态主题（蓝灰色文字） */
.exam-theme-neumorphism .exam-explanation-content {
    color: #4a6fa5;
}

.exam-theme-neumorphism .exam-explanation-content pre {
    color: #4a6fa5;
}

.exam-theme-neumorphism .exam-explanation-content h4 {
    color: #5d8ab8;
}

.exam-theme-neumorphism .exam-explanation-content p {
    color: #4a6fa5;
}

.exam-theme-neumorphism .exam-explanation-content .no-content {
    color: #7aa8d6;
}

/* AI评分显示 */
.exam-ai-scores {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 10px;
    margin-top: 10px;
}

.exam-ai-score-item {
    padding: 8px;
    text-align: center;
    font-size: 13px;
}

.exam-ai-score-item .model-name {
    color: var(--exam-text-muted);
    margin-bottom: 3px;
}

.exam-ai-score-item .model-score {
    font-weight: bold;
    color: var(--exam-text-secondary);
}

/* 正确答案显示 */
.exam-correct-answer {
    color: #4CAF50;
    font-weight: bold;
    margin-left: 10px;
}

/* 单题得分 */
.exam-question-score {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 13px;
    margin-left: 10px;
}

.exam-question-score.full {
    background: #e8f5e9;
    color: #4CAF50;
}

.exam-question-score.partial {
    background: #fff3e0;
    color: #FF9800;
}

.exam-question-score.zero {
    background: #ffebee;
    color: #f44336;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .exam-container {
        width: calc(100% - 20px);
        margin: 10px;
    }
    
    .exam-column {
        padding: 20px 25px;
    }
}

@media (max-width: 900px) {
    .exam-paper {
        flex-direction: column;
    }
    
    .exam-column.left,
    .exam-column.right {
        border: none;
        border-bottom: 1px solid var(--exam-column-border);
    }
    
    .exam-column.right {
        margin-left: 0;
    }
}

@media (max-width: 600px) {
    .exam-overlay.active {
        padding: 0;
    }
    
    .exam-container {
        width: calc(100% - 10px);
        margin: 5px;
        min-height: calc(100vh - 10px);
    }
    
    .exam-header {
        padding: 12px 15px;
    }
    
    .exam-title {
        font-size: 18px;
        letter-spacing: 2px;
    }
    
    .exam-info {
        font-size: 12px;
    }
    
    .exam-close-btn {
        width: 28px;
        height: 28px;
        font-size: 18px;
    }
    
    .exam-theme-toggle-btn {
        width: 32px;
        height: 32px;
        right: 50px;
    }
    
    .exam-column {
        padding: 15px;
    }
    
    .exam-btn {
        padding: 10px 25px;
        font-size: 14px;
        margin: 5px;
    }
    
    .exam-footer {
        padding: 20px 15px;
    }
}

/* ========== 试卷翻译气泡框样式 ========== */
/* 默认主题气泡框样式 */
.exam-translation-tooltip {
    position: fixed;
    z-index: 10010;
    width: auto;
    min-width: 200px;
    max-width: 400px;
    height: auto;
    background: linear-gradient(135deg, #FFFEF5, #f5f4e8);
    border: 1px solid rgba(100, 100, 100, 0.3);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15), 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 24px 12px 12px 12px;
    font-family: 'Nunito', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: #000;
    display: none;
    pointer-events: auto;
    animation: examTooltipFadeIn 0.2s ease-out;
    user-select: none;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* 新拟态主题气泡框样式 */
.exam-translation-tooltip.exam-tooltip-neumorphism {
    background: linear-gradient(135deg, #e8f0f8, #d4e6f9);
    border: 1px solid rgba(93, 138, 184, 0.3);
    box-shadow: 8px 8px 20px rgba(74, 111, 165, 0.2), -8px -8px 20px rgba(255, 255, 255, 0.7);
    color: #4a6fa5;
}

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

/* 拖拽条 - 默认主题 */
.exam-tooltip-drag-handle {
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 4px;
    background: rgba(150, 150, 150, 0.4);
    border-radius: 2px;
    transition: background 0.2s ease;
    cursor: grab;
}

.exam-tooltip-drag-handle::before {
    content: '';
    position: absolute;
    top: -12px;
    left: -20px;
    right: -20px;
    bottom: -12px;
    width: 80px;
    height: 28px;
}

.exam-tooltip-drag-handle:hover {
    background: rgba(150, 150, 150, 0.6);
}

.exam-tooltip-drag-handle:active {
    background: rgba(150, 150, 150, 0.8);
    cursor: grabbing;
}

/* 拖拽条 - 新拟态主题 */
.exam-tooltip-neumorphism .exam-tooltip-drag-handle {
    background: rgba(93, 138, 184, 0.4);
}

.exam-tooltip-neumorphism .exam-tooltip-drag-handle:hover {
    background: rgba(93, 138, 184, 0.6);
}

.exam-tooltip-neumorphism .exam-tooltip-drag-handle:active {
    background: rgba(93, 138, 184, 0.8);
}

/* 已拖动的气泡框禁用淡入动画 */
.exam-translation-tooltip.tooltip-dragged {
    animation: none !important;
}

/* 内容容器 */
.exam-tooltip-content-container {
    width: 100%;
}

/* 气泡框内容 */
.exam-tooltip-content {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* 原文区域 - 默认主题 */
.exam-tooltip-original-section {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-bottom: 8px;
    border-bottom: 1px solid #ccc;
}

.exam-tooltip-original-section .exam-tooltip-para {
    color: #333;
    font-size: 14px;
}

/* 译文区域 - 默认主题 */
.exam-tooltip-translation-section {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.exam-tooltip-translation-section .exam-tooltip-para {
    color: #000;
    font-size: 14px;
    font-weight: 500;
}

/* 原文区域 - 新拟态主题 */
.exam-tooltip-neumorphism .exam-tooltip-original-section {
    border-bottom-color: rgba(93, 138, 184, 0.3);
}

.exam-tooltip-neumorphism .exam-tooltip-original-section .exam-tooltip-para {
    color: #5d8ab8;
}

/* 译文区域 - 新拟态主题 */
.exam-tooltip-neumorphism .exam-tooltip-translation-section .exam-tooltip-para {
    color: #4a6fa5;
}

.exam-tooltip-para {
    word-break: break-word;
    margin: 0;
    padding: 0;
}

/* 加载状态 - 默认主题 */
.exam-tooltip-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 0;
    color: #666;
    font-size: 13px;
}

.exam-tooltip-loading::before {
    content: '';
    width: 14px;
    height: 14px;
    border: 2px solid #ccc;
    border-top-color: #666;
    border-radius: 50%;
    animation: examTooltipSpin 0.8s linear infinite;
}

@keyframes examTooltipSpin {
    to { transform: rotate(360deg); }
}

/* 错误状态 - 默认主题 */
.exam-tooltip-error {
    color: #e74c3c;
    font-size: 13px;
    padding: 10px 0;
    text-align: center;
}

/* 加载状态 - 新拟态主题 */
.exam-tooltip-neumorphism .exam-tooltip-loading {
    color: #5d8ab8;
}

.exam-tooltip-neumorphism .exam-tooltip-loading::before {
    border-color: rgba(93, 138, 184, 0.3);
    border-top-color: #5d8ab8;
}

/* 错误状态 - 新拟态主题 */
.exam-tooltip-neumorphism .exam-tooltip-error {
    color: #c0392b;
}

/* 作文参考范文样式 */
.essay-sample-answer {
    margin-top: 15px;
    padding: 12px 15px;
    border: 1px dashed var(--exam-section-border);
    border-radius: 8px;
    background: var(--exam-input-bg);
}

.essay-sample-title {
    font-weight: bold;
    margin: 0 0 8px 0;
    text-indent: 0;
    color: var(--exam-text-secondary);
}

/* 确保参考范文标题不受 .exam-content p 的 text-indent 影响 */
.exam-content .essay-sample-title {
    text-indent: 0;
}

.essay-sample-content {
    white-space: pre-wrap;
    font-family: inherit;
    margin: 0;
    line-height: 1.6;
    color: var(--exam-text);
}