* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    font-family: "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, #f6f9fc 0%, #e9efff 100%);
    color: #333;
    text-align: center;
}

.container {
    width: 90%;
    max-width: 800px;
    margin-top: 18vh;
}

h1 {
    font-size: 72px;
    font-weight: 800;
    letter-spacing: -2px;
    color: #222;
    text-shadow: 0 4px 12px rgba(0, 0, 0, .08);
    margin-bottom: 20px;
}

.subtitle {
    font-size: 22px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 60px;
}

.btn {
    display: inline-block;
    padding: 18px 42px;
    background: rgba(255, 255, 255, .7);
    color: #333;
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, .8);
    border-radius: 50px;
    backdrop-filter: blur(10px);
    font-size: 18px;
    font-weight: 600;
    transition: .3s;
    box-shadow:
        0 8px 20px rgba(0, 0, 0, .08),
        0 0 20px rgba(79, 124, 255, 0.2);   /* 蓝色光晕 */
}

.btn:hover {
    background: white;
    color: #4f7cff;
    transform: translateY(-3px);
    box-shadow:
        0 12px 30px rgba(0, 0, 0, .12),
        0 0 30px rgba(79, 124, 255, 0.35);  /* hover 时增强 */
}

.tips {
    margin-top: 30px;
    color: #888;
    font-size: 15px;
}

.footer {
    margin-top: 120px;
    color: #999;
    font-size: 14px;
}

@media (max-width: 768px) {
    .container {
        margin-top: 14vh;
    }
    h1 {
        font-size: 48px;
    }
    .subtitle {
        font-size: 18px;
    }
    .btn {
        padding: 16px 34px;
        font-size: 16px;
    }
}