/* 科技风核心样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Consolas", "Monaco", "Courier New", monospace;
}

body {
    background: #0a0a1a;
    background-image: 
        linear-gradient(rgba(0, 128, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 128, 255, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    color: #00ffcc;
    min-height: 100vh;
    padding: 20px;
}

/* 标题样式 */
.header {
    text-align: center;
    margin-bottom: 30px;
    position: relative;
}

.header h1 {
    font-size: 2.5rem;
    text-shadow: 0 0 10px #00ffcc, 0 0 20px #0099ff;
    letter-spacing: 3px;
}

.header::after {
    content: "";
    display: block;
    width: 50%;
    height: 2px;
    margin: 10px auto;
    background: linear-gradient(90deg, transparent, #00ffcc, transparent);
}

/* 关卡列表样式 */
.level-list {
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.level-card {
    background: rgba(0, 30, 60, 0.8);
    border: 1px solid #00ffcc;
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px rgba(0, 255, 204, 0.2);
}

.level-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 20px rgba(0, 255, 204, 0.5);
    border-color: #0099ff;
}

.level-card a {
    color: #00ffcc;
    text-decoration: none;
    font-size: 1.2rem;
    display: block;
}

/* 表格样式（通用） */
.data-table {
    width: 90%;
    margin: 20px auto;
    border-collapse: collapse;
    background: rgba(0, 30, 60, 0.8);
    box-shadow: 0 0 15px rgba(0, 255, 204, 0.2);
}

.data-table th, .data-table td {
    padding: 12px;
    text-align: left;
    border: 1px solid #0099ff;
}

.data-table th {
    background: rgba(0, 60, 120, 0.9);
    color: #00ffcc;
    text-shadow: 0 0 5px #0099ff;
}

.data-table tr:hover {
    background: rgba(0, 80, 160, 0.5);
}

/* 按钮样式 */
.btn {
    background: linear-gradient(to right, #0066cc, #00ffcc);
    border: none;
    color: #0a0a1a;
    padding: 10px 20px;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px rgba(0, 255, 204, 0.3);
}

.btn:hover {
    box-shadow: 0 0 20px rgba(0, 255, 204, 0.6);
    transform: scale(1.05);
}

/* 分页样式 */
.pagination {
    text-align: center;
    margin: 20px 0;
}

.pagination a {
    display: inline-block;
    padding: 8px 15px;
    margin: 0 5px;
    background: rgba(0, 30, 60, 0.8);
    border: 1px solid #00ffcc;
    color: #00ffcc;
    text-decoration: none;
    border-radius: 4px;
}

.pagination a.active {
    background: #00ffcc;
    color: #0a0a1a;
}

/* 头像样式 */
.avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid #00ffcc;
    object-fit: cover;
}

/* 登录表单 */
.login-form {
    max-width: 400px;
    margin: 50px auto;
    background: rgba(0, 30, 60, 0.8);
    padding: 30px;
    border: 1px solid #00ffcc;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0, 255, 204, 0.2);
}

.login-form input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    background: rgba(0, 10, 20, 0.8);
    border: 1px solid #0099ff;
    color: #00ffcc;
    border-radius: 4px;
}

.login-form input::placeholder {
    color: #0099ff;
    opacity: 0.7;
}

/* 返回按钮 */
.back-btn {
    display: inline-block;
    margin: 20px;
    color: #00ffcc;
    text-decoration: none;
    border: 1px solid #00ffcc;
    padding: 8px 15px;
    border-radius: 4px;
}

.back-btn:hover {
    background: rgba(0, 80, 160, 0.5);
}