/* index.html 独立样式 */
body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}
.welcome-container {
    height: 100vh;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
    background: url('/static/img/welcome.png') no-repeat center center/cover;
    position: relative;
}
.welcome-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}
.welcome-content {
    position: relative;
    z-index: 2;
    padding: 20px;
}
.welcome-title {
    font-size: 3.5em;
    font-weight: bold;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}
.welcome-subtitle {
    font-size: 1.5em;
    margin-bottom: 40px;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}
.welcome-button {
    font-size: 1.2em;
    padding: 15px 35px;
    color: white;
    background-color: #6a009a;
    border: none;
    border-radius: 50px;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}
.welcome-button:hover {
    background-color: #831fad;
    transform: translateY(-3px);
}