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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --transition: all 0.3s ease;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--bg-white);
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header and Navigation */
.navbar {
    background: var(--bg-white);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--primary-color);
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h1 a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
    flex-wrap: wrap;
    max-width: 900px;
    justify-content: center;
}

.nav-item a {
    font-weight: 500;
    color: var(--text-dark);
    text-decoration: none;
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    transition: var(--transition);
    font-size: 0.9rem;
    white-space: nowrap;
}

.nav-item a:hover,
.nav-item a.active {
    color: var(--primary-color);
    background-color: var(--bg-light);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger .bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 0;
    position: relative;
    min-height: 500px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    text-stroke: 1px rgba(255,255,255,0.8);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    opacity: 0.2;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Main Content Sections */
.overview {
    padding: 4rem 0;
    background-color: var(--bg-light);
}

.overview h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
    text-align: center;
}

.overview p {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    line-height: 1.8;
}

.latest-news {
    padding: 4rem 0;
}

.latest-news h2 {
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--primary-color);
    text-align: center;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.news-item {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.news-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.news-date {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.news-item h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.main-content {
    padding: 4rem 0;
}

.main-content h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.main-content p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.highlight-box {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    margin: 2rem 0;
    border-left: 4px solid var(--primary-color);
}

.highlight-box h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.key-trends {
    margin: 3rem 0;
}

.key-trends h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
    text-align: center;
}

.trends-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.trend-item {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border-top: 3px solid var(--primary-color);
}

.trend-item h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

/* Two-Column Layout for Sub-pages */
.two-column {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 3rem;
    margin-top: 2rem;
}

.main-column {
    background: var(--bg-white);
}

.sidebar {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    height: fit-content;
    position: sticky;
    top: 120px;
}

.sidebar h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.sidebar ul {
    list-style: none;
    margin-bottom: 2rem;
}

.sidebar ul li {
    margin-bottom: 0.5rem;
}

.sidebar ul li a {
    color: var(--text-dark);
    text-decoration: none;
    transition: var(--transition);
    display: block;
    padding: 0.3rem 0;
}

.sidebar ul li a:hover {
    color: var(--primary-color);
    padding-left: 0.5rem;
}

/* Banner Styles */
.amazon-banner {
    background: linear-gradient(135deg, #ff9500 0%, #ff7b00 100%);
    margin: 2rem 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.amazon-banner a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 1rem;
    text-align: center;
    font-weight: 600;
    transition: var(--transition);
}

.amazon-banner a:hover {
    background-color: rgba(255,255,255,0.1);
}

.ad-space {
    text-align: center;
    margin: 2rem 0;
}

.ad-space img {
    max-width: 100%;
    height: auto;
}

/* Footer */
footer {
    background: var(--text-dark);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: white;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #d1d5db;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
        max-width: none;
        justify-content: flex-start;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .two-column {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .sidebar {
        order: -1;
        position: static;
    }

    .container {
        padding: 0 1rem;
    }

    .nav-container {
        padding: 0 1rem;
    }

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

    .trends-grid {
        grid-template-columns: 1fr;
    }
}
/* ===== Partner Page Styles ===== */
.partner-page-hero{padding-top:5rem;padding-bottom:4rem;background:linear-gradient(135deg,rgba(30,64,175,0.94) 0%,rgba(14,165,233,0.9) 100%);color:#fff;position:relative;overflow:hidden}
.partner-page-hero::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at top right,rgba(255,255,255,0.18),transparent 35%),radial-gradient(circle at bottom left,rgba(255,255,255,0.12),transparent 40%)}
.partner-page-hero .container,.partner-page-content .container{position:relative;z-index:1}
.partner-page-eyebrow{display:inline-block;margin-bottom:1rem;padding:.35rem .8rem;border-radius:999px;background:rgba(255,255,255,0.16);font-size:.875rem;font-weight:700;color:#fff}
.partner-page-title{font-size:clamp(1.75rem,5vw,3rem);line-height:1.15;margin-bottom:1.25rem;color:#fff}
.partner-page-lead{max-width:820px;font-size:1.125rem;color:rgba(255,255,255,0.92);line-height:1.7}
.partner-page-content{padding:4rem 0 5rem}
.partner-page-grid{display:grid;gap:2rem}
.partner-content-block{background:#fff;border:1px solid rgba(148,163,184,0.25);border-radius:1rem;padding:2rem;box-shadow:0 4px 6px -1px rgba(0,0,0,0.07)}
.partner-content-block h2{font-size:1.4rem;margin-bottom:1rem;color:#111827}
.partner-content-block h3{font-size:1.15rem;margin:1.5rem 0 .75rem;color:#1f2937}
.partner-content-block p{line-height:1.7;color:#374151}
.partner-content-block ul,.partner-content-block ol{padding-left:1.4rem;margin-top:.75rem;color:#374151}
.partner-content-block li{margin-bottom:.4rem;line-height:1.6}
.partner-highlight-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-top:1.5rem}
.partner-highlight-card{background:#f9fafb;border:1px solid #e5e7eb;border-radius:.75rem;padding:1.25rem}
.partner-highlight-card h3{margin-top:0;font-size:1.1rem;color:#1e3a8a}
.partner-cta-box{background:linear-gradient(135deg,#1e40af 0%,#0ea5e9 100%) !important;color:#fff !important}
.partner-cta-box h2{color:#fff !important}
.partner-cta-box p,.partner-cta-box li,.partner-note{color:rgba(255,255,255,0.9)}
.partner-cta-actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1.5rem}
.partner-cta-actions .btn{display:inline-flex;align-items:center;padding:.7rem 1.4rem;border-radius:.5rem;font-weight:600;text-decoration:none;transition:all .2s;font-size:.95rem}
.partner-cta-actions .btn-primary{background:#fff;color:#1e40af;border:2px solid transparent}
.partner-cta-actions .btn-primary:hover{background:#eff6ff}
.partner-cta-actions .btn-secondary{background:rgba(255,255,255,0.15);color:#fff;border:1.5px solid rgba(255,255,255,0.35)}
.partner-cta-actions .btn-secondary:hover{background:rgba(255,255,255,0.25)}
.partner-note{margin-top:1rem;font-size:.875rem}
nav.breadcrumb{padding:.6rem 0;background:#f8fafc;border-bottom:1px solid #e2e8f0}
nav.breadcrumb .container{max-width:1200px;margin:0 auto;padding:0 1rem}
.breadcrumb-list{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:.25rem;align-items:center}
.breadcrumb-item{display:flex;align-items:center;font-size:.85rem;color:#64748b}
.breadcrumb-item:not(:last-child)::after{content:'›';margin:0 .5rem;color:#94a3b8}
.breadcrumb-item a{color:#3b82f6;text-decoration:none}
.breadcrumb-item a:hover{text-decoration:underline}
.breadcrumb-item.active{color:#1e293b;font-weight:500}
.glossary-link{color:#3b82f6;text-decoration:underline}
@media(max-width:640px){.partner-content-block{padding:1.25rem}.partner-page-hero{padding-top:3.5rem;padding-bottom:2.5rem}}