* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: #ffffff;
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

.entry-shell {
    display: flex;
    gap: 16px;
}

.entry-btn {
    min-width: 140px;
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #d1d5db;
    border-radius: 12px;
    color: #111827;
    text-decoration: none;
    background: #ffffff;
}

.entry-btn.primary {
    color: #ffffff;
    border-color: #111827;
    background: #111827;
}

@media (max-width: 640px) {
    .entry-shell {
        width: calc(100% - 32px);
        flex-direction: column;
    }

    .entry-btn {
        width: 100%;
    }
}