/* CSS: Deep Navy Theme with Responsive Optimization */
:root {
    --navy-dark: #0B192C;
    --navy-main: #1E3E62;
    --navy-light: #000000;
    --accent-color: #FFB22C;
    --accent-hover: #F8961E;
    --bg-light: #F4F7FA;
    --text-dark: #2C3E50;
    --text-muted: #6C7A89;
    --white: #FFFFFF;
    --border-color: #E2E8F0;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--white);
    -webkit-text-size-adjust: 100%;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Header */
.header {
    background-color: var(--navy-dark);
    color: var(--white);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo {
    display: flex;
    flex-direction: column;
}

.logo-main {
    font-size: 1.2rem;
    font-weight: bold;
    letter-spacing: 0.5px;
}

.logo-sub {
    font-size: 0.7rem;
    color: #94A3B8;
}

.nav {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav a {
    font-size: 0.85rem;
    color: #E2E8F0;
    transition: color 0.2s;
}

.nav a:hover {
    color: var(--accent-color);
}

.btn-header {
    background-color: var(--accent-color);
    color: var(--navy-dark) !important;
    padding: 6px 12px;
    border-radius: 4px;
    font-weight: bold;
    font-size: 0.85rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy-main) 100%);
    color: var(--white);
    padding: 70px 0 80px;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--accent-color);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
    margin-bottom: 20px;
    border: 1px solid rgba(255, 178, 44, 0.3);
}

.hero h1 {
    font-size: 2.2rem;
    line-height: 1.3;
    margin-bottom: 20px;
}

.hero h1 span {
    color: var(--accent-color);
}

.hero-lead {
    font-size: 1rem;
    color: #CBD5E1;
    max-width: 700px;
    margin: 0 auto 35px;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 6px;
    font-weight: bold;
    font-size: 1rem;
    transition: all 0.2s;
    text-align: center;
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--navy-dark);
}

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.4);
}

.btn-outline {
    background-color: transparent;
    color: var(--navy-main);
    border: 2px solid var(--navy-main);
}

.btn-accent {
    background-color: var(--accent-color);
    color: var(--navy-dark);
}

.btn-full {
    width: 100%;
}

/* Sections */
.section {
    padding: 60px 0;
}

.bg-light {
    background-color: var(--bg-light);
}

.bg-navy {
    background-color: var(--navy-dark);
}

.text-white {
    color: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 1.75rem;
    margin-bottom: 10px;
    color: var(--navy-dark);
}

.section-header.text-white h2 {
    color: var(--white);
}

.section-header p {
    color: var(--text-muted);
    font-size: 1rem;
}

.section-header.text-white p {
    color: #94A3B8;
}

/* Grids */
.problems-grid,
.services-grid,
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.problem-card,
.service-card,
.pricing-card {
    background-color: var(--white);
    padding: 30px 25px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.problem-card {
    border-top: 4px solid #E74C3C;
}

.service-card {
    position: relative;
    overflow: hidden;
    border-top: 4px solid var(--navy-main);
}

.service-num {
    font-size: 3.5rem;
    font-weight: 800;
    color: #e2e8f0;
    position: absolute;
    top: 15px;
    right: 15px;
    z-index: 0;
    line-height: 1;
    pointer-events: none;
}

.service-card h3, .service-card p {
    position: relative;
    z-index: 1;
}

.service-card h3 {
    padding-right: 40px;
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--navy-dark);
}

.service-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Concept Image Wrapper */
.concept-image-wrapper {
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    background: var(--navy-dark);
    padding: 12px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(11, 25, 44, 0.2);
}

.concept-diagram-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 6px;
}

/* Pricing Card */
.pricing-card {
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: relative;
}

.pricing-card.popular {
    border: 2px solid var(--accent-color);
    box-shadow: 0 10px 25px rgba(255, 178, 44, 0.15);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--accent-color);
    color: var(--navy-dark);
    font-size: 0.75rem;
    font-weight: bold;
    padding: 4px 12px;
    border-radius: 12px;
}

.plan-name {
    font-size: 1.15rem;
    font-weight: bold;
    color: var(--navy-dark);
    margin-bottom: 15px;
}

.plan-price {
    font-size: 2.2rem;
    font-weight: bold;
    color: var(--navy-dark);
    margin-bottom: 10px;
}

.plan-price span {
    font-size: 1rem;
    font-weight: normal;
    color: var(--text-muted);
}

.plan-target {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 25px;
}

.plan-features {
    list-style: none;
    margin-bottom: 30px;
    flex-grow: 1;
}

.plan-features li {
    font-size: 0.9rem;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.plan-features li::before {
    content: "✓ ";
    color: #10B981;
    font-weight: bold;
    margin-right: 6px;
}

/* Contact Section */
.contact-container {
    max-width: 900px;
}

.contact-box {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 30px 20px;
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 30px;
}

.consultation-info h3 {
    font-size: 1.15rem;
    margin-bottom: 15px;
    color: var(--accent-color);
}

.consultation-info ul {
    list-style: none;
    margin-bottom: 20px;
}

.consultation-info li {
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: #E2E8F0;
}

.contact-person {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 15px;
}

.person-title {
    font-size: 0.8rem;
    color: #94A3B8;
}

.person-name {
    font-size: 1.05rem;
    font-weight: bold;
    color: var(--white);
    margin-top: 4px;
}

.person-name span {
    font-size: 0.8rem;
    font-weight: normal;
    color: #CBD5E1;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    text-align: left;
}

.form-group label {
    font-size: 0.85rem;
    color: #CBD5E1;
    font-weight: bold;
}

.form-group input,
.form-group textarea {
    padding: 12px;
    border-radius: 6px;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.08);
    color: var(--white);
    font-size: 1rem; /* スマホでの自動ズーム防止 */
}

/* Footer */
.footer {
    background-color: #060E16;
    color: #94A3B8;
    padding: 30px 0;
    text-align: center;
    font-size: 0.85rem;
}

/* --- Mobile Responsive Queries --- */
@media(max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 10px;
    }
    .nav {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .hero {
        padding: 50px 0 60px;
    }
    .hero h1 {
        font-size: 1.75rem;
    }
    .hero-lead {
        font-size: 0.95rem;
    }
    .section {
        padding: 45px 0;
    }
    .section-header h2 {
        font-size: 1.5rem;
    }
    .contact-box {
        grid-template-columns: 1fr;
        padding: 20px 15px;
    }
    .pricing-card.popular {
        transform: none;
    }
}