/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

/* 标题样式 */
h1 {
    color: #667eea;
    text-align: center;
    margin-bottom: 10px;
    font-size: 2.5em;
}

h2 {
    color: #764ba2;
    margin: 30px 0 20px 0;
    padding-bottom: 10px;
    border-bottom: 3px solid #667eea;
}

h3 {
    color: #555;
    margin: 20px 0 10px 0;
}

/* 任务说明 */
.task-info {
    background: #f0f4ff;
    border-left: 5px solid #667eea;
    padding: 20px;
    margin: 20px 0;
    border-radius: 5px;
}

.task-info h3 {
    color: #667eea;
    margin-top: 0;
}

.task-info ul {
    margin-left: 20px;
    line-height: 1.8;
}

/* 提示框 */
.hint {
    background: #fff3cd;
    border-left: 5px solid #ffc107;
    padding: 15px;
    margin: 20px 0;
    border-radius: 5px;
}

.hint h4 {
    color: #856404;
    margin-bottom: 10px;
}

/* 成功提示 */
.success {
    background: #d4edda;
    border-left: 5px solid #28a745;
    padding: 15px;
    margin: 20px 0;
    border-radius: 5px;
    color: #155724;
}

/* 错误提示 */
.error {
    background: #f8d7da;
    border-left: 5px solid #dc3545;
    padding: 15px;
    margin: 20px 0;
    border-radius: 5px;
    color: #721c24;
}

/* 关卡网格 */
.level-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.level-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px;
    border-radius: 10px;
    text-decoration: none;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.level-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.level-card h3 {
    color: white;
    margin-bottom: 10px;
    font-size: 1.3em;
}

.level-card p {
    font-size: 0.9em;
    opacity: 0.9;
    line-height: 1.6;
}

.level-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.3);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8em;
    margin-bottom: 10px;
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

table th {
    background: #667eea;
    color: white;
    padding: 15px;
    text-align: left;
    font-weight: bold;
}

table td {
    padding: 12px 15px;
    border-bottom: 1px solid #ddd;
}

table tr:hover {
    background: #f5f5f5;
}

/* 列表样式 */
ul.data-list {
    list-style: none;
    padding: 0;
}

ul.data-list li {
    background: #f8f9fa;
    margin: 10px 0;
    padding: 15px;
    border-radius: 5px;
    border-left: 4px solid #667eea;
}

/* 链接样式 */
a {
    color: #667eea;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    background: #667eea;
    color: white;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    transition: background 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1em;
}

.btn:hover {
    background: #764ba2;
    text-decoration: none;
}

.btn-back {
    background: #6c757d;
    margin-top: 20px;
}

.btn-back:hover {
    background: #5a6268;
}

/* 书籍卡片 */
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.book-card {
    background: white;
    border: 1px solid #ddd;
    border-radius: 10px;
    padding: 15px;
    text-align: center;
    transition: transform 0.3s;
}

.book-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.book-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 5px;
    margin-bottom: 10px;
}

.book-title {
    font-weight: bold;
    color: #333;
    margin: 10px 0 5px 0;
}

.book-author {
    color: #666;
    font-size: 0.9em;
}

.book-price {
    color: #e74c3c;
    font-size: 1.2em;
    font-weight: bold;
    margin-top: 10px;
}

/* 分页 */
.pagination {
    text-align: center;
    margin: 30px 0;
}

.pagination a {
    display: inline-block;
    padding: 10px 15px;
    margin: 0 5px;
    background: #667eea;
    color: white;
    border-radius: 5px;
    text-decoration: none;
}

.pagination a:hover {
    background: #764ba2;
}

.pagination .current {
    background: #764ba2;
    font-weight: bold;
}

/* 表单样式 */
form {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    margin: 20px 0;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: bold;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 1em;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

/* 代码块 */
pre {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: 20px;
    border-radius: 5px;
    overflow-x: auto;
    margin: 20px 0;
}

code {
    font-family: 'Courier New', monospace;
    background: #f4f4f4;
    padding: 2px 6px;
    border-radius: 3px;
    color: #e74c3c;
}

/* 图片网格 */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    margin: 20px 0;
}

.image-item {
    text-align: center;
}

.image-item img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.image-item p {
    margin-top: 10px;
    color: #666;
}

/* 电影卡片 */
.movie-card {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 20px;
    margin: 15px 0;
    border-left: 5px solid #667eea;
}

.movie-title {
    font-size: 1.3em;
    color: #333;
    font-weight: bold;
    margin-bottom: 10px;
}

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

.movie-rating {
    display: inline-block;
    background: #ffc107;
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: bold;
    margin-top: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 1.8em;
    }

    .level-grid {
        grid-template-columns: 1fr;
    }

    .book-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 40px;
    color: #667eea;
    font-size: 1.2em;
}

/* 隐藏的秘密数据 */
.secret-data {
    background: #d4edda;
    border: 2px solid #28a745;
    border-radius: 10px;
    padding: 30px;
    margin: 20px 0;
    text-align: center;
}

.secret-data h2 {
    color: #28a745;
    border: none;
}