/* 成考政治刷题系统 - 移动端样式 (适配 iPhone 13) */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4A90D9;
    --primary-dark: #3A7BC8;
    --success-color: #52C41A;
    --error-color: #FF4D4F;
    --warning-color: #FAAD14;
    --bg-color: #F5F7FA;
    --card-bg: #FFFFFF;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --border-color: #E8E8E8;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --radius: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -webkit-tap-highlight-color: transparent;
}

/* 页面容器 */
.page {
    min-height: 100vh;
    width: 100%;
}

/* 登录页面 */
.login-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 40px 24px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.login-title {
    font-size: 32px;
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: 8px;
    text-align: center;
}

.login-subtitle {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 40px;
    text-align: center;
}

.login-form {
    width: 100%;
    max-width: 360px;
    background: var(--card-bg);
    padding: 32px 24px;
    border-radius: var(--radius);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    font-size: 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: #FFFFFF;
    transition: all 0.3s;
    -webkit-appearance: none;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(74, 144, 217, 0.1);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    -webkit-appearance: none;
}

.btn-primary {
    background: var(--primary-color);
    color: #FFFFFF;
}

.btn-primary:active {
    background: var(--primary-dark);
}

.btn-block {
    width: 100%;
}

.btn-lg {
    padding: 16px 24px;
    font-size: 18px;
}

.btn-logout {
    background: transparent;
    color: #FFFFFF;
    font-size: 14px;
    padding: 8px 12px;
}

.btn-back {
    background: transparent;
    color: var(--text-primary);
    font-size: 16px;
    padding: 8px 12px;
}

.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.btn-qty, .btn-source {
    flex: 1;
    min-width: 70px;
    padding: 10px 16px;
    font-size: 14px;
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-qty.active, .btn-source.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #FFFFFF;
}

/* 复选框组 */
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

/* 错误消息 */
.error-msg {
    color: var(--error-color);
    font-size: 14px;
    text-align: center;
    margin-top: 12px;
}

/* 头部 */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: #FFFFFF;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.header-title {
    font-size: 18px;
    font-weight: 600;
    flex: 1;
    text-align: center;
}

.header-info {
    font-size: 14px;
    opacity: 0.9;
    min-width: 60px;
    text-align: right;
}

/* 内容区域 */
.content {
    padding: 16px;
    max-width: 600px;
    margin: 0 auto;
}

/* 卡片 */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

/* 统计卡片 */
.stats-card {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.stat-item {
    background: var(--card-bg);
    padding: 16px 12px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-light);
}

/* 答题板列表 */
.boards-list {
    max-height: 400px;
    overflow-y: auto;
}

.board-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: all 0.3s;
}

.board-item:active {
    background: var(--bg-color);
}

.board-info h3 {
    font-size: 15px;
    margin-bottom: 4px;
}

.board-info p {
    font-size: 12px;
    color: var(--text-light);
}

.board-score {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

.empty-tip {
    text-align: center;
    color: var(--text-light);
    padding: 40px 0;
}

/* 答题页面 */
.quiz-content {
    padding-bottom: 80px;
}

.quiz-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.quiz-tag {
    background: var(--primary-color);
    color: #FFFFFF;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.quiz-score {
    color: var(--success-color);
    font-size: 14px;
    font-weight: 600;
}

.question-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 16px;
}

.question-content {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 20px;
}

/* 选择题选项 */
.choice-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.option-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--bg-color);
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.option-item:active {
    background: #E8F0F8;
}

.option-item.selected {
    border-color: var(--primary-color);
    background: rgba(74, 144, 217, 0.08);
}

.option-item.correct {
    border-color: var(--success-color);
    background: rgba(82, 196, 26, 0.08);
}

.option-item.wrong {
    border-color: var(--error-color);
    background: rgba(255, 77, 79, 0.08);
}

.option-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    font-size: 14px;
    font-weight: 600;
    flex-shrink: 0;
}

.option-item.selected .option-letter {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #FFFFFF;
}

.option-text {
    flex: 1;
    font-size: 15px;
    line-height: 1.6;
}

/* 主观题输入 */
.answer-textarea {
    width: 100%;
    min-height: 150px;
    padding: 14px 16px;
    font-size: 16px;
    line-height: 1.8;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    resize: vertical;
    font-family: inherit;
}

.answer-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* 答题结果 */
.answer-result {
    margin-top: 20px;
    padding: 20px;
    background: var(--bg-color);
    border-radius: 8px;
}

.result-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.result-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 18px;
    font-weight: 700;
}

.result-icon.correct {
    background: var(--success-color);
    color: #FFFFFF;
}

.result-icon.wrong {
    background: var(--error-color);
    color: #FFFFFF;
}

.result-text {
    font-size: 16px;
    font-weight: 600;
}

.result-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.result-item {
    display: flex;
    gap: 8px;
}

.result-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.result-value {
    font-size: 14px;
    color: var(--text-primary);
    flex: 1;
}

.analysis {
    background: #FFFFFF;
    padding: 12px;
    border-radius: 6px;
    line-height: 1.8;
}

/* 答题按钮区 */
.quiz-actions {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px;
    background: var(--card-bg);
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.08);
    max-width: 600px;
    margin: 0 auto;
}

/* 结果页面 */
.result-summary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius);
    padding: 32px 24px;
    margin-bottom: 16px;
    text-align: center;
}

.score-circle {
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.score-value {
    font-size: 42px;
    font-weight: 700;
    color: #FFFFFF;
}

.score-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
}

.result-stats {
    display: flex;
    justify-content: space-around;
}

.stat-row {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
}

.stat-row span:last-child {
    font-size: 20px;
    font-weight: 700;
}

.result-details {
    max-height: 500px;
    overflow-y: auto;
}

.result-detail-item {
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 12px;
}

.result-detail-item.correct {
    border-color: var(--success-color);
    background: rgba(82, 196, 26, 0.04);
}

.result-detail-item.wrong {
    border-color: var(--error-color);
    background: rgba(255, 77, 79, 0.04);
}

/* 加载动画 */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.loading::after {
    content: '';
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 适配 iPhone 13 尺寸 */
@media (max-width: 390px) {
    .stats-card {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }
    
    .stat-item {
        padding: 12px 8px;
    }
    
    .stat-value {
        font-size: 20px;
    }
    
    .btn-qty, .btn-source {
        min-width: 60px;
        padding: 8px 12px;
        font-size: 13px;
    }
}

/* 横屏适配 */
@media (max-height: 500px) and (orientation: landscape) {
    .login-container {
        padding: 20px;
    }
    
    .login-form {
        max-width: 300px;
        padding: 24px 20px;
    }
}