/* ========================================
   Reset & Base Styles
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ========================================
   Container
   ======================================== */

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

/* ========================================
   Header & Navigation
   ======================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.nav-logo h1 {
    font-family: 'Inter', sans-serif;
    font-size: 24px;
    font-weight: 800;
    color: #2563eb;
    letter-spacing: 0.5px;
}

.nav-logo-sub {
    font-size: 11px;
    color: #64748b;
    font-weight: 500;
    margin-left: 4px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 35px;
}

.nav-menu a {
    font-size: 15px;
    font-weight: 500;
    color: #475569;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #2563eb;
}

.nav-cta {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white !important;
    padding: 10px 24px;
    border-radius: 50px;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 30px;
    height: 24px;
}

.nav-toggle span {
    width: 100%;
    height: 3px;
    background: #2563eb;
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: white;
    color: #2563eb;
    border: 2px solid #2563eb;
}

.btn-secondary:hover {
    background: #2563eb;
    color: white;
}

.btn-large {
    padding: 18px 40px;
    font-size: 17px;
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #fff 100%);
    padding-top: 100px;
    padding-bottom: 80px;
    overflow: hidden;
}

.hero-shape {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(59, 130, 246, 0.05) 100%);
    clip-path: polygon(30% 0%, 100% 0%, 100% 100%, 0% 100%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero-badge {
    display: inline-block;
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    color: #1e40af;
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 30px;
}

.hero-title {
    font-size: 64px;
    font-weight: 900;
    line-height: 1.2;
    color: #0f172a;
    margin-bottom: 30px;
}

.hero-title-highlight {
    color: #2563eb;
    position: relative;
    display: inline-block;
}

.hero-title-highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 15px;
    background: rgba(37, 99, 235, 0.2);
    z-index: -1;
}

.hero-description {
    font-size: 20px;
    color: #475569;
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 20px;
    margin-bottom: 50px;
}

.hero-trust {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.hero-trust-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: #64748b;
    font-weight: 500;
}

.hero-trust-item i {
    color: #10b981;
    font-size: 18px;
}

/* ========================================
   Section Styles
   ======================================== */

section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    display: inline-block;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #2563eb;
    margin-bottom: 15px;
}

.section-title {
    font-size: 48px;
    font-weight: 900;
    color: #0f172a;
    line-height: 1.3;
    margin-bottom: 20px;
}

.section-header p {
    font-size: 18px;
    color: #64748b;
}

/* ========================================
   Problem Section
   ======================================== */

.problem {
    background: #f8fafc;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.problem-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.problem-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.problem-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.problem-icon i {
    font-size: 36px;
    color: #ef4444;
}

.problem-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 15px;
    line-height: 1.5;
}

.problem-card p {
    font-size: 15px;
    color: #64748b;
    line-height: 1.6;
}

/* ========================================
   Solution Section
   ======================================== */

.solution {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: white;
}

.solution-content {
    max-width: 900px;
    margin: 0 auto;
}

.solution .section-label {
    color: #60a5fa;
}

.solution .section-title {
    color: white;
}

.solution-description {
    font-size: 18px;
    color: #cbd5e1;
    text-align: center;
    margin-bottom: 60px;
}

.solution-steps {
    display: grid;
    gap: 30px;
}

.solution-step {
    display: flex;
    gap: 30px;
    align-items: flex-start;
    background: rgba(255, 255, 255, 0.05);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.solution-step:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.solution-step-number {
    font-size: 48px;
    font-weight: 900;
    color: #2563eb;
    font-family: 'Inter', sans-serif;
    line-height: 1;
    flex-shrink: 0;
}

.solution-step-content h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.solution-step-content p {
    font-size: 16px;
    color: #cbd5e1;
    line-height: 1.7;
}

/* ========================================
   Features Section
   ======================================== */

.features {
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 40px;
}

.feature-card {
    background: #f8fafc;
    padding: 40px;
    border-radius: 20px;
    border: 2px solid #e2e8f0;
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: #2563eb;
    box-shadow: 0 10px 40px rgba(37, 99, 235, 0.1);
    transform: translateY(-5px);
}

.feature-image {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
}

.feature-image i {
    font-size: 48px;
    color: #2563eb;
}

.feature-title {
    font-size: 24px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 20px;
    line-height: 1.4;
}

.feature-description {
    font-size: 16px;
    color: #64748b;
    line-height: 1.8;
    margin-bottom: 25px;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: #475569;
}

.feature-list i {
    color: #10b981;
    font-size: 16px;
}

/* ========================================
   Services Section
   ======================================== */

.services {
    background: #f8fafc;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.service-card {
    background: white;
    padding: 50px 40px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    position: relative;
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.service-icon i {
    font-size: 36px;
    color: #2563eb;
}

.service-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 15px;
}

.service-card p {
    font-size: 16px;
    color: #64748b;
    line-height: 1.8;
}

.service-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
}

/* ========================================
   Flow Section
   ======================================== */

.flow {
    background: white;
}

.flow-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.flow-timeline::before {
    content: '';
    position: absolute;
    left: 70px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, #2563eb 0%, #60a5fa 100%);
}

.flow-item {
    display: flex;
    gap: 30px;
    margin-bottom: 50px;
    position: relative;
}

.flow-item:last-child {
    margin-bottom: 0;
}

.flow-number {
    width: 140px;
    height: 140px;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    flex-shrink: 0;
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.3);
    z-index: 1;
}

.flow-content {
    flex: 1;
    background: #f8fafc;
    padding: 30px 35px;
    border-radius: 15px;
    margin-top: 20px;
}

.flow-content h3 {
    font-size: 22px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 12px;
}

.flow-content p {
    font-size: 16px;
    color: #64748b;
    line-height: 1.7;
}

/* ========================================
   Voice Section
   ======================================== */

.voice {
    background: #f8fafc;
}

.voice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 30px;
}

.voice-card {
    background: white;
    padding: 35px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.voice-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.voice-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.voice-avatar {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.voice-avatar i {
    font-size: 28px;
    color: #2563eb;
}

.voice-info h4 {
    font-size: 17px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 3px;
}

.voice-info p {
    font-size: 13px;
    color: #64748b;
}

.voice-rating {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
}

.voice-rating i {
    color: #fbbf24;
    font-size: 16px;
}

.voice-text {
    font-size: 15px;
    color: #475569;
    line-height: 1.8;
}

/* ========================================
   Target Section
   ======================================== */

.target {
    background: white;
}

.target-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.target-card {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 40px 35px;
    border-radius: 20px;
    text-align: center;
    border: 2px solid #bfdbfe;
    transition: all 0.3s ease;
}

.target-card:hover {
    transform: translateY(-5px);
    border-color: #2563eb;
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.15);
}

.target-icon {
    width: 80px;
    height: 80px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
}

.target-icon i {
    font-size: 36px;
    color: #2563eb;
}

.target-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 12px;
}

.target-card p {
    font-size: 15px;
    color: #475569;
    line-height: 1.7;
}

/* ========================================
   FAQ Section
   ======================================== */

.faq {
    background: #f8fafc;
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.faq-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    text-align: left;
    font-size: 18px;
    font-weight: 600;
    color: #0f172a;
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background: #f8fafc;
}

.faq-question i {
    color: #2563eb;
    font-size: 16px;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 30px 25px;
}

.faq-answer p {
    font-size: 16px;
    color: #64748b;
    line-height: 1.8;
}

/* ========================================
   CTA Section
   ======================================== */

.cta {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 42px;
    font-weight: 900;
    margin-bottom: 25px;
    line-height: 1.3;
}

.cta-description {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.9);
}

.cta-buttons {
    margin-bottom: 40px;
}

.cta .btn-primary {
    background: white;
    color: #2563eb;
}

.cta .btn-primary:hover {
    background: #f8fafc;
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 500;
}

.cta-feature i {
    color: #10b981;
    font-size: 20px;
}

/* ========================================
   Contact Form Section
   ======================================== */

.contact-form {
    background: white;
}

.form {
    max-width: 700px;
    margin: 0 auto;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    margin-bottom: 25px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.form-group label {
    font-size: 15px;
    font-weight: 600;
    color: #0f172a;
}

.required {
    color: #ef4444;
    font-size: 13px;
    margin-left: 5px;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 18px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

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

/* ========================================
   Footer
   ======================================== */

.footer {
    background: #0f172a;
    color: white;
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-brand h3 {
    font-family: 'Inter', sans-serif;
    font-size: 26px;
    font-weight: 800;
    color: #2563eb;
    margin-bottom: 5px;
}

.footer-brand-sub {
    font-size: 12px;
    color: #94a3b8;
    display: block;
    margin-bottom: 20px;
}

.footer-description {
    font-size: 15px;
    color: #cbd5e1;
    line-height: 1.8;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #f1f5f9;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    font-size: 15px;
    color: #cbd5e1;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: #2563eb;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 14px;
    color: #94a3b8;
}

/* ========================================
   Scroll to Top Button
   ======================================== */

.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(37, 99, 235, 0.4);
}

.scroll-top i {
    font-size: 20px;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .hero-title {
        font-size: 52px;
    }
    
    .section-title {
        font-size: 40px;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: white;
        flex-direction: column;
        padding: 40px;
        gap: 25px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        transition: left 0.3s ease;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero {
        min-height: auto;
        padding-top: 120px;
        padding-bottom: 60px;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .hero-description {
        font-size: 18px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-trust {
        flex-direction: column;
        gap: 15px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .problem-grid,
    .services-grid,
    .features-grid,
    .voice-grid,
    .target-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-step {
        flex-direction: column;
        gap: 20px;
    }
    
    .flow-timeline::before {
        left: 40px;
    }
    
    .flow-number {
        width: 80px;
        height: 80px;
        font-size: 14px;
    }
    
    .flow-content {
        margin-top: 0;
    }
    
    .cta-title {
        font-size: 32px;
    }
    
    .cta-description {
        font-size: 16px;
    }
    
    .cta-features {
        flex-direction: column;
        gap: 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .btn-large {
        padding: 16px 30px;
        font-size: 16px;
    }
}