/* ===================================
   4DKanKan Next Akiba'26 
   Business Pattern (DX・Tech Specialized)
   カラー：ネイビー #1A3A5F + アクセント #4A90E2
   フォント：Noto Sans JP（角ゴシック系）
   =================================== */

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

:root {
    /* Updated Color Scheme */
    --primary-navy: #1A3A5F;
    --primary-dark-blue: #1A3A5F;
    --accent-cyan: #4A90E2;
    --accent-blue: #2d72cc;
    --bg-main: #F5F7FA;
    --supplementary: #7B8A9A;
    
    /* Neutral Colors */
    --white: #ffffff;
    --light-gray: #F5F7FA;
    --gray: #e5e7eb;
    --dark-gray: #7B8A9A;
    --black: #1f2937;
    --mint-d: #00a896;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.7;
    color: var(--black);
    background-color: var(--white);
    overflow-x: hidden;
}

body.is-nav-open {
    overflow: hidden;
}

section[id],
footer {
    scroll-margin-top: 5.5rem;
}

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

/* ===================================
   Header
   =================================== */
.header {
    background: linear-gradient(135deg, var(--primary-navy) 0%, #2a4a6f 100%);
    padding: 0.75rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-image {
    height: 44px;
    width: auto;
}

.logo-text-block {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.logo-sub-text {
    color: var(--accent-cyan);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    line-height: 1;
}

.logo-text {
    color: var(--white);
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    line-height: 1;
}

.header-cta {
    flex-shrink: 0;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 0 var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

.header-nav a {
    color: rgba(255, 255, 255, 0.92);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    padding: 0.35rem 0.4rem;
    border-radius: var(--radius-sm);
    transition: background 0.2s ease, color 0.2s ease;
    white-space: nowrap;
}

.header-nav a:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--white);
}

.header-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.4rem;
    background: var(--accent-cyan);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 700;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.header-cta-btn:hover {
    background: var(--accent-blue);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.4);
}

.header-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 0;
    border: none;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.12);
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.2s ease;
}

.header-menu-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
}

.header-menu-bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--white);
    border-radius: 1px;
    transition: transform 0.25s ease, opacity 0.2s ease;
}

.header.is-nav-open .header-menu-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.header.is-nav-open .header-menu-bar:nth-child(2) {
    opacity: 0;
}

.header.is-nav-open .header-menu-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.header-backdrop {
    position: fixed;
    inset: 0;
    z-index: 998;
    background: rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.25s ease, visibility 0.25s;
}

.header.is-nav-open .header-backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    background: linear-gradient(135deg, var(--primary-navy) 0%, #2a4a6f 100%);
    color: var(--white);
    padding: var(--spacing-xl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, rgba(74, 144, 226, 0.08) 100%);
    pointer-events: none;
}

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

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-left {
    gap: 5px; /* 少し詰める */
    padding-right: var(--spacing-md);
}

.hero-title {
    font-size: 2.8rem;
    font-weight: 900;
    line-height: 1.35;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.02em;
    text-align: center;
}

.hero-line {
    display: block;
    text-align: center;
}

.hero-line-small {
    font-size: 2.1rem;
    font-weight: 900;
    line-height: 1.25;
}

.hero-line-large {
    font-size: 3.1rem;
    font-weight: 900;
    line-height: 1.2;
    margin-top: 0.25rem;
}

.highlight {
    color: var(--accent-cyan);
    position: relative;
    display: inline-block;
}

.hero-subcopy {
    background: rgba(255,255,255,0.08);
    border-left: 3px solid var(--accent-cyan);
    padding: 0.8rem 1.2rem;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin-bottom: var(--spacing-lg);
}

.hero-subcopy p {
    font-size: 0.95rem;
    line-height: 1.7;
    opacity: 0.95;
    margin: 0;
}

.hero-subcopy p + p {
    margin-top: 0.3rem;
}

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

.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.cta-button.primary {
    background: var(--accent-cyan);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.4);
}

.cta-button.primary:hover {
    background: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 144, 226, 0.5);
}

.cta-button.large {
    font-size: 1.3rem;
    padding: 1.5rem 3rem;
}

.cta-note {
    font-size: 0.9rem;
    opacity: 0.8;
    text-align: center;
}

.hero-right {
    position: relative;
}

.hero-image {
    width: 110%;
    height: auto;
    border-radius: 0;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

/* ===================================
   Event Info Section
   =================================== */
.event-info {
    padding: 3rem 0;
    background: var(--light-gray);
}

.event-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.section-title-center {
    text-align: center;
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--primary-navy);
    margin-bottom: var(--spacing-lg);
    line-height: 1.4;
}

.title-icon {
    color: var(--accent-cyan);
    margin-right: var(--spacing-xs);
}

.event-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.event-detail-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.event-detail-item i {
    font-size: 2rem;
    color: var(--accent-cyan);
    margin-top: 0.2rem;
}

.event-detail-item strong {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: var(--spacing-xs);
}

.event-detail-item p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--black);
}

.sub-text {
    font-size: 0.9rem;
    color: var(--dark-gray);
}

.event-register-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* ===================================
   Problem Section
   =================================== */
.problem {
    padding: var(--spacing-xl) 0 2rem;
    background: var(--white);
}

.problem-badge {
    display: inline-block;
    background: var(--accent-cyan);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

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

.problem-card {
    background: var(--light-gray);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.problem-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.problem-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-navy), #2a4a6f);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.problem-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: var(--spacing-sm);
}

.problem-emphasis {
    color: var(--accent-cyan);
    font-weight: 900;
    font-size: 1.25rem;
    line-height: 1.25;
    display: inline-block;
}

.problem-card p {
    color: var(--dark-gray);
    line-height: 1.7;
}

.problem-solution {
    text-align: center;
    margin-top: 1rem; 
}

.arrow-down {
    font-size: 2.5rem;
    color: var(--accent-cyan);
    margin-bottom: 0.4rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.solution-text {
    font-size: 1.4rem;
    color: var(--primary-navy);
    line-height: 1.5;
    max-width: 700px;
    margin: 0 auto 0.5rem;
}

.solution-text strong {
    color: var(--accent-cyan);
    font-weight: 900;
}

/* ===================================
   Value Proposition Section
   =================================== */
.value {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, var(--light-gray) 0%, var(--white) 100%);
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--dark-gray);
    margin-top: calc(var(--spacing-md) * -1);
    margin-bottom: var(--spacing-lg);
}

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

.value-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.6rem; 
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 35px rgba(74, 144, 226, 0.2);
}

.value-number {
    position: absolute;
    top: -15px;
    right: var(--spacing-md);
    background: var(--primary-navy);
    color: var(--white);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 900;
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.4);
}

.value-title-invert {
    background: linear-gradient(135deg, var(--primary-navy) 0%, #2a4a6f 100%);
    color: var(--white) !important;
    border-radius: var(--radius-md);
    padding: 0.7rem 0.8rem;
    margin: 0 auto var(--spacing-md);
    text-align: center;
    line-height: 1.35;
}

.value-desc-left {
    text-align: left;
}

.value-desc-center {
    text-align: center;
}

.value-icon {
    font-size: 2.5rem;
    color: var(--primary-navy);
    margin-bottom: 0.8rem;
}

.value-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.value-card p {
    color: var(--dark-gray);
    line-height: 1.7;
    text-align: center;
}

/* ===================================
   Product Section (4DKanKan Meta)
   =================================== */
.product {
    padding: var(--spacing-xl) 0;
    background: var(--white);
}

.product-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    background: var(--light-gray);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.product-image {
    width: 100%;
    max-width: 450px;
    height: auto;
    border-radius: var(--radius-md);
}

.product-title {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary-navy);
    margin-bottom: var(--spacing-sm);
}

.product-title sup {
    font-size: 1rem;
}

.product-tagline {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-cyan);
    margin-bottom: var(--spacing-md);
    border-left: none;
    padding-left: 0;
    text-align: left;
}

.product-description {
    margin-bottom: var(--spacing-md);
}

.product-description p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    color: var(--black);
}

.product-specs {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

.spec-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
}

.spec-item i {
    color: var(--accent-cyan);
    font-size: 1.2rem;
}

/* コンテンツ全体の幅調整 */
.case-study {
    padding: var(--spacing-xl) 0;
    background: var(--white);
}

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

/* 2. 小見出しの余白 */
.case-study-title {
    text-align: center;
    margin-bottom: 25px;
}

/* 3. 写真2枚の横並び設定 */
.case-study-image-wrap {
    display: flex;
    justify-content: center;
    gap: 30px;      /* 写真同士の隙間 */
    margin-bottom: 30px; /* 写真と下の本文との間の余白 */
}

.case-study-image {
    width: calc(50% - 8px); /* 親要素の半分から隙間分を引く */
    height: 250px;          /* 高さを揃える（お好みで調整） */
    object-fit: cover;      /* 画像を歪ませずに収める */
    border-radius: 8px;     /* 角を少し丸く */
    border: 1px solid #eee;
}

/* 本文エリア全体の調整 */
.case-study-body {
    margin-top: 30px;
    display: flex;
    flex-direction: column;
    gap: 20px; /* 課題と効果の間の隙間 */
}

/* 共通のボックススタイル */
.case-box {
    position: relative;
    padding: 25px;
    padding-top: 35px; /* ラベル用のスペース */
    border-radius: 8px;
    border-left: 6px solid; /* 左側の太線でアクセント */
}

/* ラベル（課題・効果）のスタイル */
.case-label {
    position: absolute;
    top: 10px;
    left: 20px;
    font-weight: 800;
    font-size: 14px;
    letter-spacing: 0.1em;
}

/* 課題（オレンジ系で注意を引く） */
.problem-box {
    background-color: #fff5f0; /* 薄いオレンジ */
    border-color: #ff8c00;      /* 濃いオレンジ */
}
.problem-box .case-label {
    color: #ff8c00;
}

/* 効果（青・ミント系でスッキリ解決） */
.effect-box {
    background-color: #f0f9f9; /* 薄いミントブルー */
    border-color: var(--mint-d); /* 前出の変数を活用、なければ #00bfa5 など */
}
.effect-box .case-label {
    color: var(--mint-d);
}

/* テキストの調整 */
.case-box p {
    margin: 0;
    line-height: 1.7;
    color: #333;
    font-weight: 500;
}

/* スマホ対応：画面が狭いときは写真も縦に並べる場合 */
@media (max-width: 600px) {
    .case-study-image-wrap {
        flex-direction: column;
    }
    .case-study-image {
        width: 100%;
        height: 200px;
    }
}

/* ===================================
   Timetable Section
   =================================== */
.timetable {
    padding: var(--spacing-xl) 0;
    background: var(--light-gray);
}

.timetable-wrapper {
    max-width: 900px;
    margin: var(--spacing-lg) auto 0;
}

.timetable-item {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--accent-cyan);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timetable-item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.timetable-item.networking {
    border-left-color: #f59e0b;
    background: linear-gradient(90deg, rgba(245, 158, 11, 0.05) 0%, var(--white) 100%);
}

.time {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
}

.content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: var(--spacing-xs);
}

.content .company {
    font-size: 0.95rem;
    color: var(--primary-navy);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.content .description {
    font-size: 0.9rem;
    color: #4b5563;
}

.column-box {
    background: linear-gradient(135deg, var(--primary-navy), #2a4a6f);
    color: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    border: 2px solid var(--accent-cyan);
}

.column-box h3 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.column-box h3 i {
    color: var(--accent-cyan);
}

.column-box p {
    line-height: 1.8;
    opacity: 0.95;
}

.count-emphasis {
    font-size: 1.35em;
    font-weight: 900;
    color: var(--accent-cyan);
}

/* ===================================
   Voices Section
   =================================== */
.voices {
    padding: var(--spacing-xl) 0;
    background: var(--white);
}

.voices-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.voice-card {
    background: var(--light-gray);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 2px solid var(--gray);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.voice-text {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary-navy);
    text-align: left;
    line-height: 1.7;
}

.archive-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #ff6b6b;
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    padding: 0.4rem 1rem;
    border: 1px solid rgba(255,107,107,0.5);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.archive-link:hover {
    background: rgba(255,107,107,0.1);
    border-color: #ff6b6b;
}

/* ===================================
   Partners Section
   =================================== */
   .partners {
    padding: var(--spacing-xl) 0;
    background: var(--white);
}

.partners-grid {
    display: grid;
    /* 1行に4列（4つずつ）を維持 */
    grid-template-columns: repeat(4, 1fr);
    /* 2行以上になっても美しく見えるよう、少し広めの余白 */
    gap: 20px;
    margin-top: var(--spacing-lg);
}

.partner-logo {
    background: #f8f9fa; /* 以前より少し明るめのグレー */
    border: 1px solid #e0e0e0; /* 境界線を細くして洗練された印象に */
    border-radius: var(--radius-md);
    padding: 20px; /* ロゴの周りに適度な空間を作る */
    
    display: flex;
    align-items: center;
    justify-content: center;
    
    /* 縦横比を 3:2 で固定。これで全カードの高さが自動で完璧に揃います */
    aspect-ratio: 3 / 2;
    
    transition: all 0.3s ease;
    overflow: hidden;
}

.partner-logo img {
    /* 親要素のpaddingを考慮しつつ、枠いっぱいに広げる */
    width: 100%;
    height: 100%;
    /* ロゴの縦横比を維持したまま、枠内に収める（重要） */
    object-fit: contain;
    /* ロゴが少し小さく見える場合は、ここを 1.1 くらいに調整してもOK */
    transform: scale(1);
    transition: transform 0.3s ease;
}

.partner-logo:hover {
    border-color: var(--accent-cyan);
    background: var(--white);
    /* 浮遊感を出すための柔らかい影 */
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    transform: translateY(-5px);
}

.partner-logo:hover img {
    /* ホバー時にロゴを少しだけ大きくして動的な印象に */
    transform: scale(1.08);
}

.partner-name-fallback,
.partner-name-text {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary-navy);
    text-align: center;
    line-height: 1.4;
    /* テキストのみの場合も考慮し、パディングを調整 */
    padding: 5px;
}

.partner-card {
    background: #f8f9fa;
    border: 1px solid #e0e0e0;
    border-radius: var(--radius-md);
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 3 / 2;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.partner-card img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

.partner-card:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

/* モバイル対応：画面が狭いときは2列にするのがベスト */
@media (max-width: 768px) {
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
}

/* ===================================
   FAQ Section
   =================================== */
.faq {
    padding: var(--spacing-xl) 0;
    background: var(--light-gray);
}

.faq-list {
    max-width: 900px;
    margin: var(--spacing-lg) auto 0;
}

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

.faq-question {
    padding: var(--spacing-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-weight: 600;
    color: var(--primary-navy);
    transition: background 0.3s ease;
    user-select: none;
}

.faq-question:hover {
    background: var(--light-gray);
}

.faq-question i.fa-question-circle {
    color: var(--accent-cyan);
    font-size: 1.5rem;
}

.faq-question span {
    flex: 1;
}

.faq-question i.fa-chevron-down {
    font-size: 0.9rem;
    transition: transform 0.3s ease;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 var(--spacing-md) var(--spacing-md);
}

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

/* ===================================
   Final CTA Section
   =================================== */
.final-cta {
    padding: 1rem 0;
    background: linear-gradient(135deg, var(--primary-navy) 0%, #2a4a6f 100%);
    color: var(--white);
    text-align: center;
}

.final-cta-content h2 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

.final-cta-content p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.final-cta-highlight {
    color: var(--accent-cyan);
    font-weight: 700;
}

.cta-date {
    font-size: 1rem;
    margin-top: var(--spacing-md);
    opacity: 0.9;
}

.event-gallery {
    display: flex;
    flex-wrap: nowrap;      /* 絶対に折り返さない */
    justify-content: flex-start; /* 左詰めに固定 */
    gap: 8px !important;    /* 隙間を8pxに強制固定（狭すぎたら10pxに） */
    margin: 15px 0;
    width: 100%;            /* 親の幅に合わせる */
  }
  
  .event-gallery img {
    /* 固定幅ではなく、4枚でちょうど収まる計算にする */
    width: calc((100% - (8px * 3)) / 4) !important; 
    /* ↑ 全体から隙間3回分を引いて4等分する計算 */
    
    height: 120px;          /* 高さは適宜調整 */
    object-fit: cover;
    border-radius: 4px;
    flex: none;             /* 勝手に広がらないように固定 */
  }

/* ===================================
   Footer
   =================================== */
.footer {
    background: #0f2034;
    color: var(--white);
    padding: var(--spacing-lg) 0;
}

.footer-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.footer-geosign-link {
    display: block;
    flex-shrink: 0;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.footer-geosign-link:hover {
    opacity: 0.85;
}

.footer-geosign-logo {
    height: 80px;
    width: auto;
    object-fit: contain;
}

.footer-info {
    font-size: 0.9rem;
    opacity: 0.9;
    line-height: 1.8;
}

.footer-info p {
    margin-bottom: 0.3rem;
}

.footer-address {
    font-size: 0.85rem;
}

.footer-email a {
    color: var(--accent-cyan);
    text-decoration: none;
}

.footer-email a:hover {
    text-decoration: underline;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 968px) {
    .container {
        padding-left: var(--spacing-sm);
        padding-right: var(--spacing-sm);
    }

    .header-container {
        flex-wrap: wrap;
        align-items: center;
        gap: 0.5rem 0.75rem;
        padding-left: var(--spacing-sm);
        padding-right: var(--spacing-sm);
    }

    .header-logo {
        flex: 1 1 auto;
        min-width: 0;
        order: 1;
    }

    .header-menu-toggle {
        display: inline-flex;
        order: 2;
        z-index: 1002;
    }

    .header-nav {
        order: 3;
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: min(100%, 320px);
        max-width: 100%;
        margin: 0;
        padding: 5.25rem 1.25rem 2rem;
        flex-direction: column;
        flex-wrap: nowrap;
        align-items: stretch;
        justify-content: flex-start;
        gap: 0;
        background: linear-gradient(180deg, #1A3A5F 0%, #152d48 100%);
        box-shadow: -8px 0 24px rgba(0, 0, 0, 0.25);
        z-index: 1001;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        transform: translateX(100%);
        visibility: hidden;
        transition: transform 0.28s ease, visibility 0.28s;
    }

    .header.is-nav-open .header-nav {
        transform: translateX(0);
        visibility: visible;
    }

    .header-nav a {
        padding: 0.85rem 0.75rem;
        font-size: 1rem;
        border-radius: var(--radius-md);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .header-nav a:last-child {
        border-bottom: none;
    }

    .header-cta {
        order: 4;
        flex: 1 1 100%;
        display: flex;
        justify-content: center;
    }

    .header-cta-btn {
        width: 100%;
        max-width: 100%;
        justify-content: center;
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }

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

    .hero-container {
        padding-left: var(--spacing-sm);
        padding-right: var(--spacing-sm);
    }

    .hero-left {
        padding-right: 0;
    }

    .hero-image {
        width: 100%;
        max-width: 100%;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-line-small {
        font-size: 1.75rem;
    }

    .hero-line-large {
        font-size: 2.45rem;
    }

    .product-content {
        padding: var(--spacing-md);
    }

    .product-image {
        max-width: 100%;
    }

    .product-title {
        font-size: 1.85rem;
    }

    .event-card {
        padding: 1.25rem;
    }

    .column-box {
        padding: var(--spacing-md);
    }

    .column-box h3 {
        font-size: 1.15rem;
        flex-wrap: wrap;
    }

    .event-gallery {
        flex-wrap: wrap;
        justify-content: center;
    }

    .event-gallery img {
        width: calc(50% - 4px) !important;
        height: auto;
        min-height: 100px;
        aspect-ratio: 4 / 3;
    }

    .final-cta-content h2 {
        font-size: 1.65rem;
    }

    .final-cta-content p {
        font-size: 1rem;
    }

    .footer-geosign-icon {
        height: auto !important;
        max-height: 64px;
        width: auto;
    }

    .hero-content,
    .product-content {
        grid-template-columns: 1fr;
    }
    
    .hero-right {
        order: -1;
    }
    
    .event-details,
    .problem-grid,
    .value-grid {
        grid-template-columns: 1fr;
    }

    .voices-grid {
        grid-template-columns: 1fr;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .timetable-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-info {
        text-align: center;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-line-small {
        font-size: 1.55rem;
    }

    .hero-line-large {
        font-size: 2.15rem;
    }
    
    .section-title-center {
        font-size: 1.8rem;
    }
    
    .partners-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-button {
        width: 100%;
        justify-content: center;
    }

    .logo-sub-text {
        font-size: 0.6rem;
    }

    .logo-text {
        font-size: 1rem;
    }

    .solution-text {
        font-size: 1.1rem;
        padding: 0 0.25rem;
    }

    .voice-text {
        font-size: 1rem;
    }

    .faq-item.active .faq-answer {
        max-height: 1200px;
    }

    .faq-question {
        padding: var(--spacing-sm);
        gap: var(--spacing-sm);
        font-size: 0.95rem;
    }

    .cta-button.large {
        font-size: 1.05rem;
        padding: 1.2rem 1.25rem;
    }

    .product-tagline {
        font-size: 1.05rem;
    }

    .case-study-title {
        font-size: 1rem;
    }

    .time {
        font-size: 1rem;
    }

    .event-gallery img {
        width: 100% !important;
        max-width: 100%;
    }
}
.hero-cta {
    display: none;
}