body {
    margin: 0;
    min-height: 100vh;
    background-image: url("../images/bg.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.container {
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

h1 {
    text-shadow: 8px 5px 2px rgba(2, 10, 233, 0.715);
    color: #ffffff;
    margin-top: 0%;
    margin-bottom: 0px;
    font-size: 50px;
}

.desc {
    text-shadow: 5px 1px 2px rgb(189, 192, 255);
    font-family: 楷体;
    font-weight: bold;
    color: #00fbffab;
    margin-bottom: 200px;
    margin-top: 0px;
    font-size: 25px;
}

.download-box {
    margin-top: 100px;
}

.download-icon {
    width: 120px;
    margin-bottom: 20px;
}

.download-btn {
    background: #d816ff;
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.download-btn:hover {
    background: #4096ff;
    transform: translateY(-2px);
}

.loading {
    margin-top: 15px;
    color: #1677ff;
}

.hidden {
    display: none;
}

.p4 {
    position: fixed;
    top: 15px;
    left: 35px;
    width: 65px;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.p4.active {
  transform: scale(0.9);
  box-shadow: 0 0 20px rgba(255, 100, 255, 0.8);
}