body {
    margin: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    font-family: "Microsoft YaHei", sans-serif;
}

.container {
    text-align: center;
    padding: 2rem;
}

.welcome-icon {
    width: 80px;
    height: 80px;
    background: #3498db;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: white;
    font-size: 40px;
}

h1 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

.subtitle {
    color: #3498db;
    font-size: 1.2rem;
    margin-top: 0.5rem;
}

p {
    color: #7f8c8d;
    font-size: 1.1rem;
}

.welcome-icon {
    width: 80px;
    height: 80px;
    background: #3498db;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;  /* 使用 auto 实现水平居中 */
    color: white;
    font-size: 40px;
}