/* 成考网站通用样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* 头部样式 */
header {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo h1 {
    font-size: 28px;
    font-weight: bold;
}

.logo span {
    font-size: 14px;
    opacity: 0.9;
}

/* 导航栏样式 */
nav {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 0;
    flex-wrap: wrap;
}

.nav-list li {
    position: relative;
}

.nav-list a {
    display: block;
    padding: 15px 25px;
    color: #333;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
}

.nav-list a:hover,
.nav-list a.active {
    color: #2a5298;
    background-color: #f0f4f8;
}

/* 主要内容区域 */
main {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
    min-height: 500px;
}

.page-title {
    font-size: 32px;
    color: #2a5298;
    margin-bottom: 10px;
    text-align: center;
}

.page-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 40px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    font-size: 16px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.btn-secondary {
    background-color: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.btn-warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

/* 卡片样式 */
.card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    margin-bottom: 30px;
}

.card-title {
    font-size: 24px;
    color: #2a5298;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 3px solid #667eea;
}

/* 信息卡片区域 */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.info-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s;
}

.info-card:hover {
    transform: translateY(-5px);
}

.info-card h3 {
    color: #2a5298;
    margin-bottom: 15px;
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-card p {
    color: #666;
    line-height: 1.8;
}

/* 筛选区域 */
.filter-section {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    margin-bottom: 30px;
}

.filter-form {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    align-items: center;
}

.filter-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.filter-item label {
    font-weight: 500;
    color: #555;
}

.filter-item select,
.filter-item input {
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    background: white;
    min-width: 150px;
}

/* 题目列表 */
.question-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.question-item {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s;
}

.question-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 10px;
}

.question-type {
    background: #f0f4f8;
    color: #667eea;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 12px;
}

.question-meta {
    color: #888;
    font-size: 14px;
}

.question-content {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 15px;
    color: #333;
}

.question-options {
    margin-bottom: 15px;
}

.option-item {
    padding: 10px 15px;
    margin-bottom: 8px;
    border-radius: 8px;
    background: #f8f9fa;
    cursor: pointer;
    transition: all 0.3s;
}

.option-item:hover {
    background: #e9ecef;
}

.option-item.correct {
    background: #d4edda;
    border: 1px solid #c3e6cb;
}

.option-item.wrong {
    background: #f8d7da;
    border: 1px solid #f5c6cb;
}

.question-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.question-actions a {
    color: #667eea;
    text-decoration: none;
    font-size: 14px;
}

.question-actions a:hover {
    text-decoration: underline;
}

/* 答案解析 */
.answer-section {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-top: 15px;
    display: none;
}

.answer-section.show {
    display: block;
}

.answer-section .answer {
    color: #28a745;
    font-weight: bold;
    margin-bottom: 10px;
}

.answer-section .analysis {
    color: #666;
    line-height: 1.8;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    padding: 10px 15px;
    border-radius: 8px;
    text-decoration: none;
    color: #333;
    background: white;
    border: 1px solid #ddd;
    transition: all 0.3s;
}

.pagination a:hover {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.pagination .current {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.pagination .disabled {
    color: #999;
    cursor: not-allowed;
}

/* 统计卡片 */
.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    text-align: center;
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 10px;
}

.stat-label {
    color: #666;
    font-size: 14px;
}

/* 科目网格 */
.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.subject-card {
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    padding: 25px;
    transition: all 0.3s;
    cursor: pointer;
    background: white;
}

.subject-card:hover {
    border-color: #667eea;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.15);
    transform: translateY(-5px);
}

.subject-card h3 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 20px;
}

.subject-card .subject-info {
    color: #666;
    margin-bottom: 15px;
}

.subject-card .subject-info p {
    margin-bottom: 8px;
}

.subject-card .topic-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.topic-tag {
    background: #f0f4f8;
    color: #667eea;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 13px;
}

.difficulty {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    margin-top: 10px;
}

.difficulty-easy {
    background: #d4edda;
    color: #155724;
}

.difficulty-medium {
    background: #fff3cd;
    color: #856404;
}

.difficulty-hard {
    background: #f8d7da;
    color: #721c24;
}

/* 试卷列表 */
.paper-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.paper-card {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    transition: all 0.3s;
    background: white;
}

.paper-card:hover {
    border-color: #667eea;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.15);
}

.paper-card h4 {
    color: #333;
    margin-bottom: 10px;
}

.paper-card .paper-meta {
    color: #888;
    font-size: 14px;
    margin-bottom: 15px;
}

.paper-card .paper-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    background: #f0f4f8;
    color: #667eea;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 12px;
}

/* 考试界面 */
.exam-container {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.exam-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e0e0e0;
    flex-wrap: wrap;
    gap: 15px;
}

.exam-timer {
    font-size: 24px;
    font-weight: bold;
    color: #667eea;
}

.exam-progress {
    margin-bottom: 20px;
}

.progress-bar {
    height: 10px;
    background: #e0e0e0;
    border-radius: 5px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s;
}

/* 页脚 */
footer {
    background: #2c3e50;
    color: white;
    padding: 40px 0;
    margin-top: 50px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.footer-section h4 {
    margin-bottom: 15px;
    color: #fff;
}

.footer-section p,
.footer-section a {
    color: #bdc3c7;
    text-decoration: none;
    line-height: 1.8;
}

.footer-section a:hover {
    color: white;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    margin-top: 20px;
    border-top: 1px solid #34495e;
    color: #95a5a6;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .nav-list {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-list a {
        padding: 12px 15px;
        font-size: 14px;
    }
    
    .page-title {
        font-size: 24px;
    }
    
    .filter-form {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-item {
        flex-direction: column;
        align-items: stretch;
    }
    
    .question-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* 提示信息 */
.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}