body, html {
    margin: 0;
    padding: 0;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    text-align: center;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
.header {
    background: url('./images/top-bg.svg');
    background-size: cover;
    padding: 40px 20px;
    text-align: center;
    position: relative;
}
.logo {
    font-size: 28px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 30px;
    color: #0288d1;
}
.main-message {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 30px;
    line-height: 1.2;
    color: #0288d1;
}
.sub-message {
    font-size: 28px;
    margin: 0 auto;
    background-color: #f0f7ff;
    border-left: 5px solid #007bff;
    padding: 15px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    font-size: 18px;
    line-height: 1.6;
    max-width: 600px;
}
.highlight {
    background-color: #0288d1;
    color: white;
    padding: 5px 15px;
    border-radius: 25px;
    font-weight: bold;
    display: inline-block;
    margin: 0 5px;
}
.cta-button {
    background-color: #FFD700; /* 黄金色 */
    color: #000000;
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
    padding: 20px 40px;
    display: inline-block;
    position: relative;
    transition: transform 0.3s ease;
    border: 2px solid #000000;
    box-shadow: 5px 5px 0px #000000;
}
.cta-primary {
    background-color: #0288d1;
    color: white;
}
.cta-button:hover {
    transform: translateY(-5px);
    box-shadow: 8px 8px 0px #000000;
}
.image-staking-top {
    max-width: 800px;
    height: auto;
    margin-top: 40px;
}
.warning {
    background-color: #f39c12;
    color: white;
    padding: 15px;
    border-radius: 5px;
    margin: 20px auto;
    max-width: 800px;
    font-size: 18px;
}
h2 {
    color: #0288d1;
    font-size: 36px;
    margin-bottom: 30px;
}
.qa-section {
    max-width: 800px;
    margin: 0 auto;
}
.qa-item {
    background-color: white;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    text-align: left;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.qa-question {
    font-weight: bold;
    font-size: 20px;
    color: #0288d1;
    margin-bottom: 10px;
}
.qa-answer {
    font-size: 18px;
}

h1, h2 {
    color: #2c3e50;
}
h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.menu-icon {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 24px;
    cursor: pointer;
}
.play-icons {
    font-size: 36px;
    margin-bottom: 20px;
    opacity: 0.5;
}
.feature {
    background-color: #3498db;
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 20px;
}
.cta-button-wrapper {
    position: relative;
    display: inline-block;
    margin: 40px 0;
}
.cta-buttons {
    margin-top: 30px;
}
.cta-primary {
    background-color: #3498db;
    color: white;
}
.cta-secondary {
    background-color: white;
    color: #3498db;
    border: 2px solid #3498db;
}
section {
    padding: 40px 0;
}
section:nth-child(even) {
    background-color: #f8f9fa;
}
section:nth-child(odd) {
    background-color: #ffffff;
}
.video-placeholder {
    position: relative;
    padding-bottom: 337.5px; /* 16:9 アスペクト比 */
    height: 0;
    overflow: hidden;
    width: 600px;
    margin: 0 auto;
}
.video-placeholder iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
.banner {
    background: linear-gradient(135deg, #0288d1, #03a9f4);
    color: white;
    padding: 20px;
    text-align: center;
    font-size: 24px;
    font-weight: bold;
    margin: 40px 0;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}
.banner:hover {
    transform: scale(1.02);
}
.banner a {
    color: white;
    text-decoration: none;
    display: block;
}

.philosophy-container {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
}
.title-area {
    flex: 1 1 300px;
    padding: 40px;
    background-color: #fff;
}
.content-area {
    flex: 2 1 600px;
    padding: 40px;
    border-left: 1px solid #e0e0e0;
}
.main-title {
    font-size: 48px;
    color: #3498db;
    margin: 0;
    line-height: 1.2;
}
.content-text {
    font-size: 16px;
    line-height: 1.6;
    color: #333;
}
.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
}
.philosophy-section.highlight {
    background-color: #fff700;
    padding: 2px 0;
}
.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
}
.social-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #333;
    font-size: 14px;
}
.social-icon {
    width: 24px;
    height: 24px;
    margin-right: 5px;
}
.profile-photo {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border-radius: 50%;
    margin-top: 20px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
ul {
    list-style: none;
    padding-left: 0;
}
ul li {
    position: relative;
    padding-left: 30px;
    margin-bottom: 15px;
    opacity: 0;
    animation: fadeIn 0.5s ease-out forwards;
}
ul li::before {
    content: '◆';
    position: absolute;
    left: 0;
    color: #1e90ff; /* Blue diamond */
    transition: transform 0.3s ease;
}
ul li:hover::before {
    transform: rotate(45deg) scale(1.2);
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}


/* レスポンシブデザイン */
@media (max-width: 1024px) {
    .philosophy-container {
        flex-direction: column;
    }
    
    .title-area, .content-area {
        flex: 1 1 100%;
    }
    
    .content-area {
        border-left: none;
        border-top: 1px solid #e0e0e0;
    }
}

/* レスポンシブデザインの追加 */
@media (max-width: 768px) {
    h1 {
        font-size: 2em;
    }
    .banner {
        font-size: 20px;
        padding: 15px;
    }
    .container {
        padding: 10px;
    }
    .cta-button {
        display: block;
        margin: 10px auto;
    }
    .image-staking-top {
        max-width: 100%;
    }
    .main-message {
        font-size: 28px;
    }
    .sub-message {
        font-size: 18px;
    }
    .main-title {
        font-size: 36px;
    }
    .title-area, .content-area {
        padding: 20px;
    }
    .profile-photo {
        width: 150px;
        height: 150px;
    }
    section {
        padding: 20px 0;
    }
    .video-placeholder {
        position: relative;
        padding-bottom: 56.25%; /* 16:9 アスペクト比 */
        height: 0;
        overflow: hidden;
        width: 80%;
        max-width: 700px;
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 28px;
    }
    
    .content-text {
        font-size: 14px;
    }
    
    .social-links {
        flex-direction: column;
        align-items: center;
    }
}