body {
    margin: 0;
    padding: 0;
    background: url('image/body_background.jpg') no-repeat center center fixed;
    background-size: cover;
    color: #222;
    font-family: 'Segoe UI', 'Hiragino Sans', 'Meiryo', sans-serif;
    min-height: 100vh;
}
.container {
    max-width: 700px;
    margin: 0 auto;
    padding: 24px 8px 48px 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
    border: 2px solid #888;
    border-radius: 16px;
}
.container::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('image/container_background.jpg') no-repeat center center;
    background-size: cover;
    filter: blur(12px);
    z-index: 0;
}
.container > * {
    position: relative;
    z-index: 1;
}
h1, .title {
    font-size: 2rem;
    margin: 16px 0 4px 0;
    text-align: center;
    font-weight: bold;
}
.subtitle {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 24px;
    text-align: center;
}
.title, .subtitle {
    background: #fff;
    padding: 0.3em 0.8em;
    border-radius: 8px;
    display: inline-block;
}
.tools-list {
    background: #d8eeff;
    padding: 20px 10px;
    border-radius: 12px;
}
.toolss-list {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: center;
    margin-bottom: 32px;
}
.tools-card {
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 2px 12px #0001;
    width: 260px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 18px 12px 14px 12px;
    transition: box-shadow 0.2s;
}
.tools-card:hover {
    box-shadow: 0 4px 24px #0002;
}
.tools-card img {
    width: 150px;
    height: 150px;
    border-radius: 10px;
    object-fit: cover;
    margin-bottom: 10px;
}
.tools-card-title {
    font-size: 1.1rem;
    font-weight: bold;
    margin-bottom: 6px;
    color: #1a237e;
}
.tools-card-desc {
    font-size: 0.98rem;
    color: #444;
    margin-bottom: 4px;
}
@media (max-width: 600px) {
    .toolss-list {
        flex-direction: column;
        gap: 18px;
    }
    .tools-card {
        width: 98%;
        min-width: 0;
    }
}
.ad-section {
    margin: 24px 0;
    width: 100%;
    display: flex;
    justify-content: center;
}