/* ===========================
   CSS Variables
   =========================== */
:root {
    --primary-color: #C71528;
    --primary-dark: #C71528;
    --primary-light: #FE8001;
    --secondary-color: #FE8001;
    --text-dark: #1a1a1a;
    --text-gray: #666666;
    --text-light: #999999;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-gradient: linear-gradient(135deg, #FE8001 0%, #B84200 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --transition: all 0.3s ease;
    --border-radius: 12px;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 64px;
}

/* ===========================
   Reset & Base Styles
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-dark);
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===========================
   Typography
   =========================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-dark);
}

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

/* ===========================
   Header & Navigation
   =========================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-brand i {
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 16px;
    border-radius: 8px;
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(0, 102, 255, 0.05);
}

.nav-link-cta {
    background: var(--bg-gradient);
    color: var(--bg-white);
    padding: 10px 24px;
}

.nav-link-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.nav-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    padding: 140px 0 80px;
    background-image:url("../images/top_back.jpg");
	background-repeat: no-repeat;
	background-size: cover;
    display: flex;
    align-items: center;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

.hero-title-highlight {
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.hero-stat {
    text-align: center;
    padding: var(--spacing-sm);
    background: var(--bg-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-gray);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* Dashboard Visual */
.hero-visual {
    position: relative;
}

.dashboard-mock {
    background: var(--bg-white);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    border: 1px solid rgba(0, 102, 255, 0.1);
}

.dashboard-header {
    background: var(--bg-gradient);
    color: var(--bg-white);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dashboard-title {
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.dashboard-date {
    font-size: 0.875rem;
    opacity: 0.9;
}

.dashboard-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
}

.metric-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: 12px;
    padding: var(--spacing-sm);
    display: flex;
    gap: 12px;
    align-items: center;
    border: 2px solid transparent;
    transition: var(--transition);
}

.metric-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.metric-card-sales {
    border-color: rgba(0, 102, 255, 0.2);
}

.metric-card-ltv {
    border-color: rgba(0, 217, 255, 0.2);
}

.metric-card-repeat {
    border-color: rgba(52, 211, 153, 0.2);
}

.metric-card-roas {
    border-color: rgba(251, 146, 60, 0.2);
}

.metric-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.metric-card-sales .metric-icon {
    background: linear-gradient(135deg, #0066FF 0%, #3385FF 100%);
    color: white;
}

.metric-card-ltv .metric-icon {
  background: linear-gradient(135deg, #94C42D 0%, #C1EE4D 100%);
  color: white;
}

.metric-card-repeat .metric-icon {
    background: linear-gradient(135deg, #34D399 0%, #6EE7B7 100%);
    color: white;
}

.metric-card-roas .metric-icon {
    background: linear-gradient(135deg, #FB923C 0%, #FDBA74 100%);
    color: white;
}

.metric-content {
    flex: 1;
}

.metric-label {
    font-size: 0.75rem;
    color: var(--text-gray);
    margin-bottom: 2px;
    font-weight: 500;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.metric-change {
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
}

.metric-change.positive {
    color: #10b981;
}

.metric-change i {
    font-size: 0.75rem;
}

.dashboard-chart {
    padding: var(--spacing-md);
    background: #fafafa;
    height: 200px;
}

.dashboard-platforms {
    display: flex;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: #f8f9fa;
    border-top: 1px solid #e9ecef;
    flex-wrap: wrap;
}

.platform-tag {
    background: var(--bg-white);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 6px;
    border: 1px solid rgba(0, 102, 255, 0.2);
}

.platform-tag i {
    font-size: 1rem;
}

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 32px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: var(--bg-gradient);
    color: var(--bg-white);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--bg-white);
}

.btn-white {
    background: var(--bg-white);
    color: var(--primary-color);
}

.btn-white:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.125rem;
}

/* ===========================
   Sections
   =========================== */
.section {
    padding: var(--spacing-xl) 0;
}

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

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-gray);
}

/* ===========================
   Strengths Section
   =========================== */
.strengths-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.strength-card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 2px solid transparent;
}

.strength-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.strength-icon {
    width: 64px;
    height: 64px;
    background: var(--bg-gradient);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--bg-white);
    margin-bottom: var(--spacing-md);
}

.strength-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.strength-description {
    color: var(--text-gray);
    line-height: 1.8;
}

/* ===========================
   Services Section
   =========================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.service-card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--bg-gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.service-number {
    font-size: 3rem;
    font-weight: 900;
    color: rgba(0, 102, 255, 0.1);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.service-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1) 0%, rgba(0, 217, 255, 0.1) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.service-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.service-description {
    color: var(--text-gray);
    line-height: 1.8;
}

/* ===========================
   Solutions Section
   =========================== */
.solutions-grid {
    display: grid;
    gap: var(--spacing-md);
}

.solution-card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-md);
    align-items: center;
    transition: var(--transition);
}

.solution-card:hover {
    box-shadow: var(--shadow-lg);
}

.solution-problem {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.solution-problem i {
    color: #ef4444;
    font-size: 1.5rem;
    flex-shrink: 0;
    margin-top: 4px;
}

.solution-problem h3 {
    font-size: 1.125rem;
    color: var(--text-dark);
}

.solution-arrow {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.solution-answer {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.solution-answer i {
    color: #ff7800;
    font-size: 1.5rem;
    flex-shrink: 0;
    margin-top: 4px;
}

.solution-answer p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* ===========================
   Reasons Section
   =========================== */
.reasons-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.reason-card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-left: 4px solid transparent;
}

.reason-card:hover {
    border-left-color: var(--primary-color);
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
}

.reason-number {
    display: inline-block;
    background: var(--bg-gradient);
    color: var(--bg-white);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.reason-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 12px;
}

.reason-title i {
    color: var(--primary-color);
}

.reason-description {
    color: var(--text-gray);
    line-height: 1.8;
}

/* ===========================
   CTA Section
   =========================== */
.cta {
    background: var(--bg-gradient);
    color: var(--bg-white);
}

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

.cta-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    color: var(--bg-white);
}

.cta-description {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.cta-benefits {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.cta-benefit {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.125rem;
    font-weight: 600;
}

.cta-benefit i {
    font-size: 1.25rem;
}

.cta-note {
    margin-top: var(--spacing-md);
    opacity: 0.9;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: #1a1a1a;
    color: #ffffff;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--bg-white);
    margin-bottom: var(--spacing-sm);
}

.footer-logo i {
    color: var(--primary-light);
}

.footer-description {
    color: #cccccc;
    line-height: 1.8;
}

.footer-links h4,
.footer-contact h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

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

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

.footer-links a {
    color: #cccccc;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
}

.footer-contact p {
    color: #cccccc;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #999999;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .strengths-grid,
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-toggle {
        display: block;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

    .hero-cta {
        flex-direction: column;
    }

    .dashboard-metrics {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }

    .strengths-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }

    .solution-card {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .solution-arrow {
        transform: rotate(90deg);
    }

    .reasons-grid {
        grid-template-columns: 1fr;
    }

    .cta-title {
        font-size: 2rem;
    }

    .cta-benefits {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .btn {
        padding: 10px 24px;
        font-size: 0.9375rem;
    }

    .btn-large {
        padding: 14px 32px;
        font-size: 1rem;
    }

    .section {
        padding: var(--spacing-lg) 0;
    }
}

.mobile-br {
    display: none;
}

.desktop-br {
    display: inline;
}

@media (max-width: 768px) {
    .mobile-br {
        display: inline;
    }

    .desktop-br {
        display: none;
    }
}