/* 基本样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, html {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    height: 100%;
    width: 100%;
}

/* 模态弹窗样式 */
.modal {
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 9999;
}

.modal-content {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 500px;
    overflow-y: auto;
    position: relative;
}

.close {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    cursor: pointer;
}

.modal-header p {
    color: red;
    text-align: center;
    font-size: 16px;
    margin-bottom: 20px;
}

.slider img {
    width: 100%;
    height: auto;
    display: block;
    margin-bottom: 10px;
}

.modal-footer {
    text-align: center;
    padding-top: 20px;
}

.modal-footer button {
    background-color: #007BFF;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.modal-footer button:hover {
    background-color: #0056b3;
}

/* 主内容容器样式 */
.container {
    display: none; /* 默认不显示，由JS控制 */
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    width: 100%;
    position: relative;
    z-index: 10;
}

.registration {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
    max-width: 300px;
}

.registration button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 15px;
    font-size: 18px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.registration button:hover {
    background-color: #45a049;
}