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

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.8;
    color: #4a4a4a;
    background-color: #fef9f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.sp-only {
    display: none;
}

.pc-only {
    display: inline;
}

header {
    background: linear-gradient(135deg, #f8b4a8 0%, #f5a3c7 100%);
    color: white;
    padding: 40px 0;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.subtitle {
    font-size: 1.1rem;
    font-weight: 300;
    opacity: 0.95;
}

.hero {
    background-color: white;
    padding: 60px 0;
    text-align: center;
    border-bottom: 1px solid #f0e8e8;
}

.hero h2 {
    font-size: 2rem;
    color: #d85a7a;
    margin-bottom: 20px;
    font-weight: 500;
}

.hero p {
    font-size: 1.1rem;
    color: #666;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

.tool-intro {
    padding: 80px 0;
    background-color: #fef9f5;
}

.tool-intro h2 {
    text-align: center;
    font-size: 2rem;
    color: #d85a7a;
    margin-bottom: 40px;
    font-weight: 500;
}

.tool-card {
    background: white;
    padding: 50px;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(216, 90, 122, 0.1);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.tool-card h3 {
    font-size: 1.5rem;
    color: #d85a7a;
    margin-bottom: 20px;
    font-weight: 500;
}

.tool-card p {
    color: #666;
    margin-bottom: 30px;
    line-height: 1.8;
}

.btn-primary {
    display: inline-block;
    background: linear-gradient(135deg, #f8b4a8 0%, #f5a3c7 100%);
    color: white;
    padding: 15px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(248, 180, 168, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(248, 180, 168, 0.6);
}

.btn-primary.large {
    padding: 20px 50px;
    font-size: 1.1rem;
}

.process {
    padding: 80px 0;
    background-color: white;
}

.process h2 {
    text-align: center;
    font-size: 2rem;
    color: #d85a7a;
    margin-bottom: 50px;
    font-weight: 500;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.step {
    background: linear-gradient(135deg, #fff5f5 0%, #ffeef5 100%);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease;
}

.step:hover {
    transform: translateY(-5px);
}

.step-number {
    background: linear-gradient(135deg, #f8b4a8 0%, #f5a3c7 100%);
    color: white;
    width: 80px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step h3 {
    color: #d85a7a;
    margin-bottom: 15px;
    font-size: 1.2rem;
    font-weight: 500;
}

.step p {
    color: #666;
    font-size: 0.95rem;
}

.videos {
    padding: 80px 0;
    background-color: #fef9f5;
}

.videos h2 {
    text-align: center;
    font-size: 2rem;
    color: #d85a7a;
    margin-bottom: 50px;
    font-weight: 500;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.video-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s ease;
}

.video-card:hover {
    transform: translateY(-5px);
}

.video-card h3 {
    padding: 20px 20px 15px;
    color: #d85a7a;
    font-size: 1.2rem;
    font-weight: 500;
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.video-card p {
    padding: 15px 20px 20px;
    color: #666;
    font-size: 0.95rem;
}

.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8b4a8 0%, #f5a3c7 100%);
    text-align: center;
    color: white;
}

.cta h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    font-weight: 500;
}

.cta p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    opacity: 0.95;
}

.cta .btn-primary {
    background: white;
    color: #d85a7a;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.cta .btn-primary:hover {
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

footer {
    background-color: #f5f0ed;
    padding: 30px 0;
    text-align: center;
    color: #999;
}

@media (max-width: 768px) {
    .sp-only {
        display: inline;
    }
    
    .pc-only {
        display: none;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    header {
        padding: 30px 0;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .hero {
        padding: 40px 0;
    }
    
    .hero h2 {
        font-size: 1.5rem;
        margin-bottom: 15px;
    }
    
    .hero p {
        font-size: 0.95rem;
        line-height: 1.7;
    }
    
    .tool-intro {
        padding: 50px 0;
    }
    
    .tool-intro h2 {
        font-size: 1.6rem;
        margin-bottom: 30px;
    }
    
    .tool-card {
        padding: 30px 20px;
        border-radius: 15px;
    }
    
    .tool-card h3 {
        font-size: 1.3rem;
        margin-bottom: 15px;
    }
    
    .tool-card p {
        font-size: 0.95rem;
        margin-bottom: 25px;
    }
    
    .process {
        padding: 50px 0;
    }
    
    .process h2 {
        font-size: 1.6rem;
        margin-bottom: 35px;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .step {
        padding: 25px 20px;
    }
    
    .step h3 {
        font-size: 1.1rem;
    }
    
    .step p {
        font-size: 0.9rem;
    }
    
    .videos {
        padding: 50px 0;
    }
    
    .videos h2 {
        font-size: 1.6rem;
        margin-bottom: 35px;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .video-card h3 {
        padding: 15px 15px 10px;
        font-size: 1.1rem;
    }
    
    .video-card p {
        padding: 10px 15px 15px;
        font-size: 0.9rem;
    }
    
    .cta {
        padding: 50px 0;
    }
    
    .cta h2 {
        font-size: 1.6rem;
        margin-bottom: 15px;
    }
    
    .cta p {
        font-size: 1rem;
        margin-bottom: 25px;
    }
    
    .btn-primary {
        padding: 12px 30px;
        font-size: 0.95rem;
    }
    
    .btn-primary.large {
        padding: 15px 35px;
        font-size: 1rem;
    }
    
    footer {
        padding: 20px 0;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
        line-height: 1.3;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    .hero h2 {
        font-size: 1.3rem;
        line-height: 1.4;
    }
    
    .hero p {
        font-size: 0.9rem;
    }
    
    .tool-intro h2,
    .process h2,
    .videos h2,
    .cta h2 {
        font-size: 1.4rem;
        line-height: 1.4;
    }
    
    .tool-card h3 {
        font-size: 1.2rem;
    }
    
    .tool-card p {
        font-size: 0.9rem;
    }
    
    .step h3 {
        font-size: 1rem;
    }
    
    .video-card h3 {
        font-size: 1rem;
    }
    
    .btn-primary {
        padding: 10px 25px;
        font-size: 0.9rem;
    }
    
    .btn-primary.large {
        padding: 12px 30px;
        font-size: 0.95rem;
    }
}