/* 答题区域 */
.answer-wrapper {
    background: #c8dff0;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 200px;
}

.answer-wrapper.fullscreen {
    position: fixed;
    top: 15px;
    left: 15px;
    right: 15px;
    bottom: 15px;
    z-index: 100;
}

.answer-area {
    padding: 15px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", Arial, sans-serif;
    background: #a8c8e1;
    overflow-x: hidden;
}

/* 启动页面 */
.start-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.85);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-y: auto;
    padding: 20px;
}

.start-panel {
    background: white;
    padding: 30px 40px;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    width: 100%;
    max-width: 600px;
}

.start-panel h2 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 24px;
}

.disclaimer {
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 20px;
    font-size: 13px;
    line-height: 1.8;
    color: #856404;
}

.disclaimer strong {
    display: block;
    margin-bottom: 8px;
    color: #d32f2f;
    font-size: 14px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-size: 14px;
    font-weight: bold;
}

.form-group input {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
}

.form-group input:focus {
    outline: none;
    border-color: #4a90e2;
}

.timer-option {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

.timer-option input[type="radio"] {
    width: auto;
    cursor: pointer;
}

.timer-option label {
    margin: 0;
    font-weight: normal;
    cursor: pointer;
}

#countdownInput {
    width: 80px;
    margin-left: 10px;
}

.start-btn {
    width: 100%;
    padding: 12px;
    background: #4a90e2;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 10px;
}

.start-btn:hover {
    background: #357abd;
}

/* 顶部栏 */
.header {
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    color: white;
    padding: 10px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s;
    flex-wrap: wrap;
    gap: 10px;
}

.header.hidden {
    transform: translateY(-100%);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.user-details {
    font-size: 11px;
    line-height: 1.5;
}

.header-center {
    flex: 1;
    text-align: center;
    min-width: 200px;
}

.exam-title {
    font-size: 13px;
    line-height: 1.5;
}

.subtitle {
    font-size: 11px;
    opacity: 0.9;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.timer {
    background: rgba(255,255,255,0.2);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.timer.warning {
    background: rgba(255, 87, 34, 0.3);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.toggle-btn, .pause-btn, .submit-btn {
    padding: 5px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.3s;
    white-space: nowrap;
}

.toggle-btn, .pause-btn {
    background: rgba(255,255,255,0.2);
    border: 1px solid white;
    color: white;
}

.submit-btn {
    background: #ff9800;
    color: white;
    border: none;
    font-weight: bold;
}

.submit-btn:hover {
    background: #f57c00;
}

/* 主体布局 */
.container {
    display: flex;
    height: calc(100vh - 70px);
    padding: 15px;
    gap: 15px;
}

.container.header-hidden {
    height: 100vh;
}

/* 左侧边栏 */
.sidebar {
    width: 110px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    transition: all 0.3s;
}

.sidebar.hidden {
    width: 0;
    overflow: hidden;
    padding: 0;
    gap: 0;
}

.question-selector {
    background: #c8dff0;
    border-radius: 8px;
    padding: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.question-selector h3 {
    font-size: 13px;
    color: #333;
    margin-bottom: 10px;
    text-align: center;
}

.question-numbers {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
}

.question-num-btn {
    width: 32px;
    height: 32px;
    background: white;
    border: 1px solid #b0c9e0;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    font-weight: bold;
    color: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all 0.3s;
}

.question-num-btn:hover {
    background: #e3f2fd;
    border-color: #4a90e2;
}

.question-num-btn.active {
    background: #4a90e2;
    color: white;
    border-color: #4a90e2;
}

.question-num-btn .num-required {
    position: absolute;
    top: -5px;
    right: -5px;
    color: #e74c3c;
    font-size: 14px;
    font-weight: bold;
}

.notice-box {
    background: #c8dff0;
    border-radius: 8px;
    padding: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    flex: 1;
    overflow-y: auto;
}

.notice-box h3 {
    color: #e74c3c;
    margin-bottom: 10px;
    font-size: 13px;
    border-bottom: 2px solid #e74c3c;
    padding-bottom: 5px;
}

.notice-item {
    margin: 8px 0;
    line-height: 1.6;
    font-size: 11px;
    color: #333;
}

.notice-item::before {
    content: "※ ";
    color: #e74c3c;
    font-weight: bold;
}

.law-link {
    margin-top: 12px;
    padding: 8px;
    background: white;
    border-radius: 6px;
    text-align: center;
}

.law-link a {
    color: #4a90e2;
    text-decoration: none;
    font-size: 11px;
    display: block;
    padding: 5px;
    border: 1px solid #4a90e2;
    border-radius: 4px;
    transition: all 0.3s;
}

.law-link a:hover {
    background: #4a90e2;
    color: white;
}

/* 右侧主内容 */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 15px;
    min-width: 0;
}

/* 题目区域 */
.question-wrapper {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 200px;
}

.question-wrapper.fullscreen {
    position: fixed;
    top: 15px;
    left: 15px;
    right: 15px;
    bottom: 15px;
    z-index: 100;
}

.question-area {
    padding: 15px;
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.toolbar {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid #e0e0e0;
    align-items: center;
    flex-wrap: wrap;
}

.toolbar-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
}

.toolbar-item label {
    color: #666;
}

.toolbar-item select {
    padding: 4px 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

.fullscreen-btn, .answer-fullscreen-btn {
    padding: 4px 10px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.3s;
    white-space: nowrap;
}

.fullscreen-btn {
    margin-left: auto;
}

.fullscreen-btn:hover, .answer-fullscreen-btn:hover {
    background: #f5f5f5;
    border-color: #4a90e2;
}

.question-content {
    font-size: 15px;
    line-height: 2;
    color: #333;
    flex: 1;
}

.question-title {
    font-weight: bold;
    margin-bottom: 15px;
    color: #2c3e50;
}

.material-section {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 2px solid #f0f0f0;
}

.problems-section {
    margin-top: 15px;
}

.problem-item {
    margin: 10px 0;
    line-height: 1.8;
}

/* 答题区域 */
.answer-wrapper {
    background: #c8dff0;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 200px;
}

.answer-wrapper.fullscreen {
    position: fixed;
    top: 15px;
    left: 15px;
    right: 15px;
    bottom: 15px;
    z-index: 100;
}

.answer-area {
    padding: 15px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* 问题切换区域 - 移到答题区顶部 */
.question-tabs {
    display: flex;
    gap: 6px;
    padding-bottom: 10px;
    margin-bottom: 10px;
    border-bottom: 1px solid #b0c9e0;
    flex-wrap: wrap;
    order: -1;
}

.answer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid #b0c9e0;
    flex-wrap: wrap;
    gap: 10px;
}

.answer-header-left {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.answer-label {
    font-weight: bold;
    color: #2c3e50;
    font-size: 13px;
}

.current-question {
    color: #555;
    font-size: 12px;
}

.answer-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.char-count, .mark-checkbox {
    font-size: 11px;
    color: #666;
}

.mark-checkbox {
    display: flex;
    align-items: center;
    gap: 5px;
}

.mark-checkbox input {
    cursor: pointer;
}

#answerInput {
    flex: 1;
    border: 1px solid #b0c9e0;
    border-radius: 4px;
    padding: 12px;
    font-size: 14px;
    line-height: 1.8;
    resize: none;
    font-family: "Microsoft YaHei", Arial, sans-serif;
    background: white;
    min-height: 100px;
}

#answerInput:focus {
    outline: none;
    border-color: #4a90e2;
}

#answerInput:disabled {
    background: #f5f5f5;
    cursor: not-allowed;
}

.question-tab {
    padding: 5px 14px;
    border: 1px solid #b0c9e0;
    background: white;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 11px;
    position: relative;
    white-space: nowrap;
}

.question-tab:hover {
    border-color: #4a90e2;
    color: #4a90e2;
}

.question-tab.active {
    background: #4a90e2;
    color: white;
    border-color: #4a90e2;
}

.question-tab.marked::after {
    content: "?";
    position: absolute;
    top: -6px;
    right: -6px;
    background: #ff9800;
    color: white;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: bold;
}

.question-tab .required-mark {
    color: #e74c3c;
    margin-left: 3px;
    font-weight: bold;
}

/* 警告和提示 */
.time-warning, .exam-end-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.7);
    z-index: 1500;
    justify-content: center;
    align-items: center;
}

.time-warning-content, .exam-end-panel {
    background: white;
    padding: 30px 40px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.time-warning-icon {
    font-size: 50px;
    margin-bottom: 15px;
}

.time-warning-text {
    font-size: 20px;
    font-weight: bold;
    color: #2c3e50;
    margin-bottom: 10px;
}

.time-warning-sub {
    font-size: 14px;
    color: #666;
}

.exam-end-panel h2 {
    font-size: 24px;
    color: #2c3e50;
    margin-bottom: 25px;
}

.exam-end-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.exam-end-btn {
    padding: 10px 25px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-home {
    background: #ff9800;
    color: white;
}

.btn-review {
    background: #4caf50;
    color: white;
}

.edit-warning {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 25px 35px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    z-index: 3000;
    text-align: center;
}

.edit-warning-text {
    font-size: 16px;
    color: #e74c3c;
    font-weight: bold;
    margin-bottom: 8px;
}

.edit-warning-sub {
    font-size: 12px;
    color: #666;
}

/* 切换按钮 */
.toggle-sidebar-btn {
    position: fixed;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    background: #4a90e2;
    color: white;
    border: none;
    padding: 20px 6px;
    cursor: pointer;
    z-index: 50;
    border-radius: 0 4px 4px 0;
    font-size: 11px;
    writing-mode: vertical-rl;
    transition: all 0.3s;
}

.toggle-sidebar-btn:hover {
    background: #357abd;
    padding-left: 10px;
}

/* 响应式设计 */
@media screen and (max-width: 1200px) {
    .header-center .exam-title {
        font-size: 12px;
    }
    
    .sidebar {
        width: 100px;
    }
    
    .question-num-btn {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }
}

@media screen and (max-width: 768px) {
    .header {
        padding: 8px 10px;
    }
    
    .header-left, .header-right {
        min-width: auto;
    }
    
    .avatar {
        width: 35px;
        height: 35px;
    }
    
    .user-details {
        font-size: 10px;
    }
    
    .exam-title {
        font-size: 11px;
    }
    
    .subtitle {
        font-size: 10px;
    }
    
    .container {
        padding: 10px;
        gap: 10px;
    }
    
    .sidebar {
        width: 80px;
    }
    
    .sidebar.hidden {
        width: 0;
    }
    
    .question-selector, .notice-box {
        padding: 8px;
    }
    
    .question-selector h3, .notice-box h3 {
        font-size: 12px;
    }
    
    .question-num-btn {
        width: 26px;
        height: 26px;
        font-size: 11px;
    }
    
    .notice-item {
        font-size: 10px;
    }
    
    .law-link a {
        font-size: 10px;
        padding: 4px;
    }
    
    .question-area, .answer-area {
        padding: 10px;
    }
    
    .toolbar {
        gap: 8px;
    }
    
    .toolbar-item {
        font-size: 11px;
    }
    
    .toolbar-item select {
        font-size: 11px;
    }
    
    .question-content {
        font-size: 13px;
        line-height: 1.8;
    }
    
    #answerInput {
        font-size: 13px;
        padding: 10px;
    }
    
    .question-tab {
        padding: 4px 10px;
        font-size: 10px;
    }
    
    .start-panel {
        padding: 20px 25px;
    }
    
    .start-panel h2 {
        font-size: 20px;
    }
    
    .disclaimer {
        font-size: 12px;
        padding: 12px;
    }
}

@media screen and (max-width: 480px) {
    .header {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }
    
    .header-left, .header-center, .header-right {
        justify-content: center;
        min-width: 100%;
    }
    
    .header-right {
        flex-direction: column;
        gap: 8px;
    }
    
    .container {
        flex-direction: column;
        height: auto;
        min-height: calc(100vh - 180px);
    }
    
    .sidebar {
        width: 100%;
        flex-direction: row;
        gap: 10px;
    }
    
    .sidebar.hidden {
        width: 100%;
        height: 0;
        overflow: hidden;
    }
    
    .question-selector {
        flex: 1;
    }
    
    .notice-box {
        flex: 1;
    }
    
    .main-content {
        flex: 1;
    }
    
    .question-wrapper, .answer-wrapper {
        min-height: 150px;
    }
    
    .toggle-sidebar-btn {
        left: auto;
        right: 10px;
        top: auto;
        bottom: 10px;
        transform: none;
        writing-mode: horizontal-tb;
        padding: 6px 12px;
        border-radius: 4px;
    }
    
    .toggle-sidebar-btn:hover {
        padding-left: 12px;
    }
    
    .start-panel {
        padding: 20px;
        max-width: 100%;
    }
    
    .exam-end-panel {
        padding: 25px 20px;
        min-width: auto;
        width: 90%;
    }
    
    .time-warning-content {
        padding: 25px 20px;
    }
}

/* 打印样式 */
@media print {
    .header, .sidebar, .toolbar, .answer-controls, .question-tabs,
    .toggle-sidebar-btn, .start-overlay, .time-warning, 
    .exam-end-overlay, .edit-warning {
        display: none !important;
    }
    
    body {
        background: white;
    }
    
    .container {
        height: auto;
        padding: 0;
    }
    
    .question-wrapper, .answer-wrapper {
        box-shadow: none;
        page-break-inside: avoid;
    }
    
    #answerInput {
        border: 1px solid #000;
        min-height: 200px;
    }
}