:root {
    --primary-color: #6a11cb;
    --secondary-color: #2575fc;
    --text-color: #333;
    --light-text: #fff;
    --dark-bg: #111;
    --light-bg: #f8f9fa;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'メイリオ', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-bg);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--light-text);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: var(--box-shadow);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-svg {
    width: 150px;
    height: auto;
}

nav ul {
    display: flex;
    list-style-type: none;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: var(--light-text);
    text-decoration: none;
    font-weight: 600;
    padding: 5px 10px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

nav ul li a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), 
                url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="%236a11cb"/><path d="M0 50 L100 50" stroke="%232575fc" stroke-width="2"/></svg>');
    background-size: cover;
    background-position: center;
    color: var(--light-text);
    text-align: center;
    padding: 120px 20px 80px;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: var(--light-text);
    padding: 12px 30px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: bold;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: #fff;
}

.features h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: var(--primary-color);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.feature-item {
    background-color: var(--light-bg);
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

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

.feature-icon {
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* How It Works Section */
.how-it-works {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.how-it-works h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: var(--primary-color);
}

.steps {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.step {
    flex: 1;
    min-width: 250px;
    margin: 15px;
    padding: 30px;
    background-color: #fff;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--box-shadow);
    position: relative;
}

.step-number {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--light-text);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: bold;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.cta-center {
    text-align: center;
    margin-top: 40px;
}

/* FAQ Section */
.faq {
    padding: 80px 0;
    background-color: #fff;
}

.faq h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: var(--primary-color);
}

.faq-item {
    margin-bottom: 30px;
    padding: 20px;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.faq-item h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

/* Footer */
footer {
    background-color: var(--dark-bg);
    color: var(--light-text);
    padding: 50px 0 20px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 30px;
}

.footer-logo {
    flex: 1;
    min-width: 200px;
    margin-bottom: 20px;
}

.logo-svg-footer {
    max-width: 150px;
}

.footer-links {
    flex: 1;
    min-width: 200px;
    margin-bottom: 20px;
}

.footer-links h4, .footer-keywords h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.footer-links ul {
    list-style-type: none;
}

.footer-links ul li {
    margin-bottom: 8px;
}

.footer-links ul li a {
    color: var(--light-text);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--secondary-color);
}

.footer-keywords {
    flex: 2;
    min-width: 300px;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
}

/* Responsive Design */
@media screen and (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    nav ul {
        flex-direction: column;
        position: absolute;
        top: 60px;
        right: 0;
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        width: 200px;
        padding: 20px;
        border-radius: 0 0 0 var(--border-radius);
        transform: translateX(100%);
        transition: var(--transition);
        opacity: 0;
    }
    
    nav ul.active {
        transform: translateX(0);
        opacity: 1;
    }
    
    nav ul li {
        margin: 10px 0;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero, .feature-item, .step, .faq-item {
    animation: fadeIn 1s ease-out forwards;
}