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

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 20px 0;
    transition: all 0.3s ease;
}

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

.logo {
    font-size: 28px;
    font-weight: 900;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 2px;
}

.nav {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav a:hover {
    color: #667eea;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #667eea;
    transition: width 0.3s ease;
}

.nav a:hover::after {
    width: 100%;
}

.btn-contact {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white !important;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
}

.btn-contact:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn-contact::after {
    display: none;
}

/* Hero Section */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    opacity: 0.9;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="white" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translateY(0); }
    100% { transform: translateY(100px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    padding: 60px 20px;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 900;
    margin-bottom: 30px;
    line-height: 1.3;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 1s ease;
}

.hero-content p {
    font-size: 24px;
    margin-bottom: 40px;
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.3s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.btn-cta {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 20px 50px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 18px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.btn-cta:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

/* Problem Section */
.problem-section {
    padding: 100px 0;
    background: #f8f9fa;
}

.problem-section h2 {
    text-align: center;
    font-size: 40px;
    font-weight: 900;
    margin-bottom: 60px;
    color: #333;
}

.problem-section h2 i {
    color: #e74c3c;
    margin-right: 15px;
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.problem-item {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    text-align: center;
}

.problem-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.problem-item i {
    font-size: 60px;
    color: #e74c3c;
    margin-bottom: 25px;
    display: block;
}

.problem-item h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    color: #333;
}

.problem-item p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
}

/* Feature Section */
.feature-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.feature-section h2 {
    text-align: center;
    font-size: 40px;
    font-weight: 900;
    margin-bottom: 60px;
}

.feature-section h2 i {
    margin-right: 15px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.feature-item {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 40px;
    border-radius: 20px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    text-align: center;
}

.feature-item:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-10px);
}

.feature-item i {
    font-size: 60px;
    margin-bottom: 25px;
    display: block;
    color: #fff;
}

.feature-item h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
}

.feature-item p {
    font-size: 16px;
    opacity: 0.9;
    line-height: 1.8;
}

/* Call to Action Section */
.call-to-action-section {
    padding: 100px 0;
    background: #1a1a2e;
    color: white;
    text-align: center;
}

.call-to-action-section h2 {
    font-size: 36px;
    font-weight: 900;
    margin-bottom: 50px;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-cta-large {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 50px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 18px;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.5);
    transition: all 0.3s ease;
}

.btn-cta-large:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.7);
}

.btn-download {
    display: inline-block;
    background: transparent;
    color: white;
    padding: 20px 50px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 18px;
    border: 2px solid white;
    transition: all 0.3s ease;
}

.btn-download:hover {
    background: white;
    color: #1a1a2e;
    transform: translateY(-5px);
}

/* Footer */
.footer {
    background: #0f0f1e;
    color: white;
    text-align: center;
    padding: 40px 0;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 15px;
    }

    .hero-content h1 {
        font-size: 32px;
    }

    .hero-content p {
        font-size: 18px;
    }

    .problem-section h2,
    .feature-section h2,
    .call-to-action-section h2 {
        font-size: 28px;
    }

    .problems-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-cta-large,
    .btn-download {
        width: 100%;
        max-width: 400px;
    }
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
}

/* Section ID targets for smooth scroll */
section {
    scroll-margin-top: 80px;
}