/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, html {
    height: 100%;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #ffffff; /* 纯白背景 */
    font-family: Arial, sans-serif;
}

.container {
    text-align: center;
    padding: 20px;
}

/* 按钮样式：仿照 WS 官方绿 */
.btn {
    display: inline-block;
    background-color: #25D366;
    color: white;
    text-decoration: none;
    padding: 18px 60px;
    font-size: 24px;
    font-weight: bold;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease;
    margin-bottom: 20px;
}

/* 按钮点击效果 */
.btn:active {
    transform: scale(0.95);
}

/* 引导文字样式 */
.text-bold {
    font-size: 18px;
    color: #333333;
    font-weight: bold;
    margin-bottom: 8px;
}

.text-light {
    font-size: 14px;
    color: #888888;
}