/* --- Variables --- */
:root {
    --primary-color: #2c3e50;
    --accent-color: #007aff;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --text-main: #333333;
    --text-muted: #666666;
    --border-color: #e0e0e0;
    --danger-color: #d9534f;
    --container-width: 1000px;
}

/* --- Base Styles --- */
body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.8;
    color: var(--text-main);
    margin: 0;
    padding: 0;
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3 {
    margin: 0;
    line-height: 1.4;
}

/* --- Header / First View --- */
header {
    padding: 100px 0 60px;
    text-align: center;
    background: radial-gradient(circle at top, #ffffff, #f0f4f8);
}

.tagline {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 6px 20px;
    font-weight: bold;
    font-size: 0.9rem;
    margin-bottom: 24px;
    border-radius: 4px;
}

h1 {
    font-size: clamp(1.8rem, 5vw, 2.8rem);
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--primary-color);
}

.sub-copy {
    max-width: 720px;
    margin: 0 auto 40px;
    font-size: 1.15rem;
    text-align: left;
}

.poc-notice {
    color: var(--danger-color);
    font-weight: bold;
    font-size: 0.95rem;
    text-align: center;
}

/* --- Sections --- */
section {
    padding: 100px 0;
    border-bottom: 1px solid var(--border-color);
}

h2 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    color: var(--primary-color);
}

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--accent-color);
    margin: 20px auto 0;
}

/* --- Image Placeholders --- */
.image-placeholder {
    background-color: #f1f3f5;
    border: 2px dashed #cfd8dc;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #90a4ae;
    min-height: 320px;
    width: 100%;
    overflow: hidden;
}

.image-placeholder img {
    width: 100%;
    height: auto;
    display: block;
}

/* --- Components --- */
.problem-box {
    background: var(--bg-light);
    padding: 50px;
    border-radius: 16px;
}

.problem-list {
    list-style: none;
    padding: 0;
    max-width: 600px;
    margin: 0 auto 30px;
}

.problem-list li {
    padding-left: 35px;
    position: relative;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.problem-list li::before {
    content: '×';
    position: absolute;
    left: 0;
    color: var(--danger-color);
    font-weight: bold;
    font-size: 1.5rem;
    line-height: 1;
}

.problem-summary {
    text-align: center;
    font-weight: bold;
    font-size: 1.2rem;
    border-top: 1px solid var(--border-color);
    padding-top: 30px;
}

.accent-text {
    text-align: center;
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 50px;
}

/* Flex Layout */
.flex-row {
    display: flex;
    flex-wrap: wrap;
    gap: 50px;
    align-items: center;
}

.flex-text { flex: 1; min-width: 320px; }
.flex-image { flex: 1; min-width: 320px; }

.check-list {
    padding-left: 20px;
}

.check-list li {
    margin-bottom: 15px;
}

/* Dark Section */
.dark-section {
    background-color: var(--primary-color);
    color: white;
}

.dark-section h2 { color: white; }
.center-h3 { text-align: center; margin-bottom: 30px; opacity: 0.9; }

/* Pricing */
.price-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 60px 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    text-align: center;
    margin-bottom: 60px;
}

.price-val {
    font-size: 4rem;
    font-weight: bold;
    color: var(--accent-color);
    margin: 20px 0;
}

.currency { font-size: 1.2rem; margin-left: 10px; }

.price-details {
    text-align: left;
    max-width: 450px;
    margin: 40px auto 0;
}

.standby-box {
    border: 2px solid var(--accent-color);
    padding: 40px;
    border-radius: 16px;
    background: #f0f7ff;
    margin-top: 50px;
}

/* Examples */
.example-box {
    background: #f1f3f5;
    padding: 30px;
    border-left: 6px solid var(--primary-color);
    margin-bottom: 25px;
}

.label {
    display: block;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 0.9rem;
}

/* FAQ */
.faq-item { margin-bottom: 40px; }
.faq-q { font-weight: bold; color: var(--accent-color); font-size: 1.15rem; margin-bottom: 10px; }
.faq-a { margin: 0; }

/* CTA Area */
.cta-area {
    text-align: center;
    padding: 120px 0;
    background: var(--bg-light);
}

.cta-button {
    display: inline-block;
    background: var(--accent-color);
    color: white;
    padding: 24px 60px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.4rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,122,255,0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,122,255,0.4);
}

.cta-sub { margin-top: 25px; font-size: 0.95rem; color: var(--text-muted); }

/* Footer */
footer {
    padding: 60px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Helpers */
.small-note { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }
.mt-10 { margin-top: 10px; }
.center-text { text-align: center; }

/* --- Responsive --- */
@media (max-width: 768px) {
    header { padding: 60px 0 40px; }
    section { padding: 60px 0; }
    .problem-box { padding: 30px 20px; }
    .price-val { font-size: 3rem; }
    .price-card { padding: 40px 20px; }
}