body {
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.main-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    box-sizing: border-box;
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.main-brand {
    font-size: 2.2em;
    color: #fff;
    font-weight: 800;
    letter-spacing: 1px;
    text-shadow: 0 2px 12px rgba(80,40,160,0.15);
}
.main-guide-title {
    font-size: 1.5em;
    color: #f0f3fc;
    margin-top: 10px;
    font-weight: 600;
    text-shadow: 0 2px 8px rgba(80,40,160,0.10);
}
.main-guide-desc {
    color: #eaeaff;
    font-size: 1.1em;
    margin-top: 8px;
    margin-bottom: 20px;
    text-shadow: 0 1px 6px rgba(80,40,160,0.12);
}
.container h1:not(.main-brand),
.container h2:not(.main-guide-title),
.container p:not(.main-guide-desc) {
    color: #303030;
}

.main-card {
    display:flex;
    gap:32px;
    flex-wrap:wrap;
    justify-content:center;
}

.main-card-item {
    background:white;
    border-radius:16px;
    box-shadow:0 8px 24px rgba(0,0,0,0.08);
    padding:24px 20px;
    display:flex;
    flex-direction:column;
    align-items:center;
    transition:transform 0.2s,box-shadow 0.2s;
    width: 260px;
    height: 220px;
    cursor:pointer;
}

.main-card-item:hover {
    transform:translateY(-8px);
    box-shadow:0 12px 32px rgba(0,0,0,0.12);
}

.main-card-item-title {
    font-size:1.3em;
    font-weight:600;
    color:#333;
}

.main-card-sumnail {
    width:64px;
    height:64px;
    margin-bottom:16px;
}

.main-card-item-desc {
    color:#764ba2;
    font-size:1em;
    margin-top:8px;
    display: -webkit-box;
    display: box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
    max-height: 2.8em;
    text-align: center;
}

@media (max-width: 480px) {
    html {
        font-size: 80%;
    }
    .main-container {
        padding-top: 30px;
    }
    .main-guide-title {
        margin-top: 2;
    }
    .main-guide-desc {
        margin-top: 0;
    }
    .main-card-item {
        min-width: 180px;
        min-height: 160px;
        padding: 20px 32px;
    }
    .main-card-item-title {
        font-size: 1em;
    }
    .main-card-item-desc {
        font-size: 0.8em;
    }
}