html, body {
    margin: 0;
    padding: 0;
    font-family: '微软雅黑', '宋体', Tahoma, Geneva, sans-serif;
    background: linear-gradient(40deg, #7A88FF, #7AFFAF); /* 使用渐变色作为背景 */
    color: #333;
}


a {
    text-decoration: none;
    color: #007bff;
}

a:hover {
    color: #0056b3;
}

.container {
    text-align: center;
    padding-bottom: 250px; /* 为 footer 预留空间 */
}

.content-container {
    margin-top: 80px;
    margin-bottom: 80px;
}

.headline {
    font-size: 36px;
    font-weight: 700;
    color: #007bff;
}

.description {
    font-size: 18px;
    color: #333;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: #007bff;
    margin-bottom: 20px;
}

.app-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
}

.app {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.app-logo {
    width: 80px;
    height: 80px;
}

.app-name {
    margin-top: 10px;
    font-size: 18px;
}

.button-container {
    margin-top: 20px;
}

.cta-button {
    display: inline-block;
    padding: 15px 30px;
    font-size: 24px;
    font-weight: bold;
    text-align: center;
    text-transform: uppercase;
    background: linear-gradient(90deg, #03a9f4, #f441a5, #ffeb3b, #03a9f4);
    background-size: 400%;
    color: white;
    border-radius: 50px;
    transition: 0.5s;
}

.cta-button:hover {
    background-position: 100% 0;
}

/* 在现有的 CSS 中对 footer 添加以下样式 */

.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    text-align: center;
    padding: 20px 0;
    background-color: #666;
    color: white;
}


.copyright {
    font-size: 14px;
    color: black;
}