/* ========================================
   グローバルスタイル
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
 
:root {
    /* Microsoftブルーをベースにしたカラーパレット */
    --primary-color: #0078D4;
    --primary-dark: #005A9E;
    --primary-light: #50E6FF;
    --secondary-color: #2B88D8;
    --accent-color: #00BCF2;
    
    /* グレースケール */
    --gray-900: #1F1F1F;
    --gray-800: #323130;
    --gray-700: #605E5C;
    --gray-600: #8A8886;
    --gray-500: #A19F9D;
    --gray-400: #C8C6C4;
    --gray-300: #EDEBE9;
    --gray-200: #F3F2F1;
    --gray-100: #FAF9F8;
    --white: #FFFFFF;
    
    /* テキストカラー */
    --text-primary: #1F1F1F;
    --text-secondary: #605E5C;
    --text-light: #8A8886;
    
    /* 成功・警告・エラー */
    --success-color: #107C10;
    --warning-color: #FF8C00;
    --error-color: #D13438;
    
    /* シャドウ */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    
    /* フォント */
    --font-primary: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* トランジション */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}
 
body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background-color: var(--white);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
 
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
 
/* ========================================
   ヘッダー
======================================== */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition-normal);
}
 
.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}
 
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}
 
.logo i {
    font-size: 32px;
}
 
.nav {
    display: flex;
    gap: 32px;
}
 
.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
    padding: 8px 0;
}
 
.nav-link:hover {
    color: var(--primary-color);
}
 
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition-fast);
}
 
.nav-link:hover::after {
    width: 100%;
}
 
/* ========================================
   ヒーローセクション
======================================== */
.hero {
    background: linear-gradient(135deg, #0078D4 0%, #00BCF2 100%);
    color: var(--white);
    padding: 120px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-left {
    animation: fadeInUp 0.8s ease;
}

.hero-right {
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 24px;
}

.hero-title .highlight {
    display: inline-block;
    background: linear-gradient(to right, #50E6FF, #FFFFFF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    line-height: 1.8;
    margin-bottom: 40px;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: flex-start;
}

.hero-examples-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--white);
}

.hero-examples-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.hero-example-item {
    background: rgba(255, 255, 255, 0.15);
    padding: 16px;
    border-radius: 12px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
    backdrop-filter: blur(10px);
    cursor: default;
}

.hero-example-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 20px;
}

.hero-example-text h5 {
    font-size: 14px;
    font-weight: 600;
    margin: 0 0 4px 0;
    color: var(--white);
}

.hero-example-text p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.85);
    margin: 0;
    line-height: 1.4;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

/* デコレーション要素 */
.hero-decoration {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}
 
.decoration-circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 20s ease-in-out infinite;
}
 
.circle-1 {
    width: 300px;
    height: 300px;
    top: -100px;
    right: -50px;
    animation-delay: 0s;
}
 
.circle-2 {
    width: 200px;
    height: 200px;
    bottom: -50px;
    left: -50px;
    animation-delay: 2s;
}
 
.circle-3 {
    width: 150px;
    height: 150px;
    top: 50%;
    left: 10%;
    animation-delay: 4s;
}
 
@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(180deg); }
}
 
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
 
/* ========================================
   ボタンスタイル
======================================== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transition: left var(--transition-normal);
    z-index: 0;
}

.btn:hover::before {
    left: 100%;
}

.btn span, .btn {
    position: relative;
    z-index: 1;
}

.btn-primary {
    background-color: var(--white);
    color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(0, 120, 212, 0.2);
}

.btn-primary:hover {
    background-color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 120, 212, 0.35);
}

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border-color: var(--white);
    box-shadow: inset 0 0 0 2px var(--white);
}

.btn-secondary:hover {
    background-color: var(--white);
    color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.3);
}

.btn-large {
    padding: 18px 48px;
    font-size: 18px;
}
 
/* ========================================
   AIエージェント活用例セクション
======================================== */
.use-case {
    padding: 80px 0;
    background: linear-gradient(135deg, #F5F9FF 0%, #FFFFFF 100%);
}
 
.use-case-content {
    max-width: 1000px;
    margin: 0 auto;
}
 
.use-case-card {
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--gray-300);
}
 
.use-case-header {
    background: linear-gradient(135deg, #0078D4 0%, #00BCF2 100%);
    padding: 32px 40px;
    display: flex;
    align-items: center;
    gap: 24px;
}
 
.use-case-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
 
.use-case-icon i {
    font-size: 40px;
    color: var(--white);
}
 
.use-case-title-area {
    flex: 1;
}
 
.use-case-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
}
 
.use-case-goal {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 600;
    background: rgba(255, 255, 255, 0.15);
    padding: 8px 16px;
    border-radius: 6px;
    display: inline-block;
    margin-top: 8px;
}
 
.use-case-department {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}
 
.use-case-body {
    padding: 40px;
}
 
/* 情報グリッド */
.use-case-info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}
 
.use-case-info-item {
    background: var(--gray-100);
    padding: 20px;
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}
 
.info-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}
 
.info-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
}
 
.highlight-metric {
    color: var(--primary-color);
    font-size: 18px;
}
 
/* 活用シーン・想定効果・仕様セクション */
.use-case-section {
    margin-bottom: 32px;
}
 
.section-heading {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}
 
.section-heading i {
    color: var(--primary-color);
}
 
.section-text {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
}
 
.effect-list {
    list-style: none;
    padding-left: 0;
}
 
.effect-list li {
    padding: 12px 0 12px 32px;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 15px;
}
 
.effect-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 700;
    font-size: 20px;
}
 
/* 仕様リスト */
.spec-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
 
.spec-item {
    background: var(--gray-100);
    padding: 20px;
    border-radius: 12px;
    display: flex;
    gap: 16px;
    align-items: flex-start;
}
 
.spec-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    flex-shrink: 0;
}
 
.spec-content {
    flex: 1;
}
 
.spec-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}
 
.spec-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}
 
.spec-sub-list {
    list-style: none;
    padding-left: 0;
    margin-top: 8px;
}
 
.spec-sub-list li {
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}
 
.spec-sub-list li strong {
    color: var(--text-primary);
    font-weight: 600;
}
 
/* フロー図 */
.use-case-flow {
    margin-bottom: 40px;
}
 
.flow-diagram {
    background: var(--gray-100);
    padding: 32px;
    border-radius: 12px;
}
 
.flow-step {
    background: var(--white);
    border-radius: 12px;
    padding: 20px 24px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 8px;
}
 
.flow-step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    flex-shrink: 0;
}
 
.flow-step-content {
    flex: 1;
}
 
.flow-step-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}
 
.flow-step-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}
 
.flow-arrow {
    text-align: center;
    color: var(--primary-color);
    font-size: 24px;
    margin: 8px 0;
}
 
.flow-branch {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 16px;
}
 
.flow-branch-item {
    background: var(--white);
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}
 
.flow-yes {
    border: 2px solid var(--success-color);
}
 
.flow-no {
    border: 2px solid var(--warning-color);
}
 
.branch-label {
    font-size: 14px;
    font-weight: 700;
    text-align: center;
    padding: 6px 16px;
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 12px;
}
 
.yes-label {
    background: var(--success-color);
    color: var(--white);
}
 
.no-label {
    background: var(--warning-color);
    color: var(--white);
}
 
.flow-branch .flow-step {
    margin-bottom: 0;
}
 
/* システムプロンプト */
.use-case-details {
    margin-top: 40px;
}
 
.prompt-box {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 28px 32px;
    border-radius: 12px;
    font-family: 'Courier New', monospace;
    line-height: 1.8;
}
 
.prompt-text {
    margin-bottom: 12px;
    font-size: 14px;
}
 
.prompt-text strong {
    color: var(--white);
    font-weight: 600;
}
 
.prompt-rule {
    margin: 20px 0;
    padding: 16px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    border-left: 4px solid var(--primary-light);
}
 
.rule-label {
    color: var(--primary-light);
    font-weight: 700;
    margin-bottom: 12px;
}
 
.rule-list {
    list-style: none;
    padding-left: 0;
}
 
.rule-list li {
    padding-left: 24px;
    position: relative;
    margin-bottom: 8px;
    font-size: 14px;
}
 
.rule-list li::before {
    content: '•';
    position: absolute;
    left: 8px;
    color: var(--primary-light);
    font-weight: 700;
}
 
.prompt-format {
    background: rgba(0, 0, 0, 0.3);
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}
 
.prompt-format code {
    color: var(--primary-light);
    font-size: 13px;
    line-height: 1.8;
}
    background-color: transparent;
    color: var(--white);
    border-color: var(--white);
}
 
.btn-secondary:hover {
    background-color: var(--white);
    color: var(--primary-color);
    transform: translateY(-2px);
}
 
.btn-large {
    padding: 18px 48px;
    font-size: 18px;
}
 
/* ========================================
   セクション共通スタイル
======================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-header::after {
    content: '';
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
    margin: 20px auto 0;
    display: block;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
    font-weight: 400;
}
 
/* ========================================
   概要セクション
======================================== */
.about {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--white) 100%);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 120, 212, 0.05) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    position: relative;
    z-index: 1;
}

.about-card {
    background: var(--white);
    padding: 40px 32px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid var(--gray-300);
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
    transform-origin: left;
}

.about-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
    border-color: var(--primary-color);
}

.about-card:hover::before {
    transform: scaleX(1);
}
 
.about-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 36px;
    box-shadow: 0 8px 20px rgba(0, 120, 212, 0.25);
    transition: all var(--transition-normal);
}

.about-card:hover .about-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 12px 30px rgba(0, 120, 212, 0.4);
}

.about-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 15px;
}
 
/* ========================================
   研修コースセクション
======================================== */
.courses {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-100) 100%);
}

.course-card {
    background: var(--white);
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    margin-bottom: 40px;
    overflow: hidden;
    transition: all var(--transition-normal);
    border-left: 4px solid var(--primary-color);
    position: relative;
}

.course-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(0, 120, 212, 0.03) 100%);
    pointer-events: none;
}

.course-card:hover {
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
    transform: translateY(-6px);
}

.course-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 32px 40px;
    display: flex;
    align-items: center;
    gap: 24px;
    position: relative;
    z-index: 1;
}

.course-number {
    font-size: 48px;
    font-weight: 700;
    opacity: 0.8;
    min-width: 80px;
}
 
.course-title {
    font-size: 28px;
    font-weight: 600;
    line-height: 1.3;
}
 
.course-meta {
    background-color: var(--gray-100);
    padding: 20px 40px;
    display: flex;
    gap: 40px;
    border-bottom: 1px solid var(--gray-300);
}
 
.course-meta span {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-weight: 500;
}
 
.course-meta i {
    color: var(--primary-color);
}
 
.course-content {
    padding: 40px;
}
 
.course-section {
    margin-bottom: 32px;
}
 
.course-section:last-child {
    margin-bottom: 0;
}
 
.course-section h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}
 
.course-section h4 i {
    color: var(--primary-color);
}
 
.course-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}
 
.course-goals,
.course-agenda {
    list-style: none;
    padding-left: 0;
}
 
.course-goals li,
.course-agenda li {
    padding: 12px 0 12px 32px;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.6;
}
 
.course-goals li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 700;
    font-size: 20px;
}
 
.course-agenda li::before {
    content: '•';
    position: absolute;
    left: 8px;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 24px;
    line-height: 1;
}
 
/* ワークショップグリッド */
.workshop-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin-top: 20px;
}
 
.workshop-item {
    background: var(--gray-100);
    padding: 16px 20px;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition-fast);
}
 
.workshop-item:hover {
    background: var(--primary-light);
    transform: translateX(4px);
}
 
/* ワークショップ画像 */
.workshop-example {
    margin-top: 24px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
 
.workshop-image {
    width: 100%;
    height: auto;
    display: block;
}
 
/* ワークショップ参考資料カード */
.workshop-reference-card {
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--white) 100%);
    border-radius: 16px;
    border: 2px dashed var(--gray-400);
    margin-bottom: 40px;
    overflow: hidden;
    transition: var(--transition-normal);
}
 
.workshop-reference-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}
 
.workshop-reference-header {
    padding: 40px;
    text-align: center;
}
 
.reference-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #FF8C00, #FFB84D);
    color: var(--white);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}
 
.reference-badge i {
    font-size: 16px;
}
 
.workshop-reference-title {
    font-size: 26px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}
 
.workshop-reference-description {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}
 
.workshop-reference-content {
    padding: 0 40px 40px;
}
 
.workshop-image-label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
}
 
.workshop-image-label i {
    color: var(--primary-color);
    font-size: 16px;
}
 
.workshop-image-container {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 2px solid var(--gray-300);
    transition: var(--transition-normal);
}
 
.workshop-image-container:hover {
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}
 
.workshop-reference-image {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
}
 
/* ワークショップ画像プレースホルダー */
.workshop-image-placeholder {
    min-height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 40px;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-200) 100%);
    border-radius: 8px;
    position: relative;
}
 
.workshop-image-placeholder::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 20px;
    border: 2px dashed var(--gray-400);
    border-radius: 8px;
}
 
.placeholder-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 1;
}
 
.placeholder-icon i {
    font-size: 48px;
    color: var(--white);
}
 
.placeholder-text {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}
 
.placeholder-subtext {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}
 
/* ========================================
   プログラム全体図セクション
======================================== */
.program-overview {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--gray-100) 0%, var(--white) 100%);
}
 
.overview-images {
    display: grid;
    gap: 40px;
}
 
.overview-image-item {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
}
 
.overview-image-item:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-xl);
}
 
.overview-image {
    width: 100%;
    height: auto;
    display: block;
}
 
/* ========================================
   お問い合わせセクション
======================================== */
.contact {
    padding: 100px 0;
    background-color: var(--white);
}

.contact-button-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 32px;
    gap: 16px;
}

.contact-button-wrapper .btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: 0 8px 30px rgba(0, 120, 212, 0.3);
    padding: 18px 48px;
    font-size: 18px;
    gap: 12px;
    display: inline-flex;
    align-items: center;
    font-weight: 700;
}

.contact-button-wrapper .btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, #005a9c 100%);
    box-shadow: 0 12px 50px rgba(0, 120, 212, 0.4);
    transform: translateY(-6px);
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
}
 
.contact-form {
    background: var(--gray-100);
    padding: 48px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}
 
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}
 
.form-group {
    display: flex;
    flex-direction: column;
}
 
.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 14px;
}
 
.required {
    color: var(--error-color);
}
 
.form-group input,
.form-group textarea {
    padding: 14px 16px;
    border: 2px solid var(--gray-300);
    border-radius: 6px;
    font-family: var(--font-primary);
    font-size: 16px;
    transition: var(--transition-fast);
    background-color: var(--white);
}
 
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.1);
}
 
.form-group textarea {
    resize: vertical;
    min-height: 120px;
}
 
.form-submit {
    text-align: center;
    margin-top: 32px;
}
 
/* ========================================
   フッター
======================================== */
.footer {
    background-color: var(--gray-900);
    color: var(--gray-400);
    padding: 60px 0 24px;
}
 
.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 40px;
}
 
.footer-section h4 {
    color: var(--white);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
}
 
.footer-section p {
    line-height: 1.7;
    margin-bottom: 16px;
}
 
.footer-section ul {
    list-style: none;
}
 
.footer-section ul li {
    margin-bottom: 12px;
}
 
.footer-section ul li a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition-fast);
}
 
.footer-section ul li a:hover {
    color: var(--primary-light);
}
 
.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: 24px;
    text-align: center;
    color: var(--gray-500);
}
 
/* ========================================
   レスポンシブデザイン
======================================== */
 
/* タブレット (768px以下) */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .hero {
        padding: 80px 0 60px;
    }

    .hero-split {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

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

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

    .hero-example-item {
        padding: 12px;
    }

    .hero-example-text h5 {
        font-size: 13px;
    }

    .hero-example-text p {
        font-size: 11px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .use-case-header {
        flex-direction: column;
        align-items: flex-start;
        padding: 24px;
    }
    
    .use-case-icon {
        width: 60px;
        height: 60px;
    }
    
    .use-case-icon i {
        font-size: 28px;
    }
    
    .use-case-title {
        font-size: 24px;
    }
    
    .use-case-goal {
        font-size: 14px;
        padding: 6px 12px;
    }
    
    .use-case-body {
        padding: 24px;
    }
    
    .use-case-info-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .flow-diagram {
        padding: 20px;
    }
    
    .flow-branch {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .prompt-box {
        padding: 20px;
    }
    
    .course-header {
        flex-direction: column;
        align-items: flex-start;
        padding: 24px;
    }
    
    .course-number {
        font-size: 36px;
    }
    
    .course-title {
        font-size: 24px;
    }
    
    .course-meta {
        flex-direction: column;
        gap: 12px;
        padding: 16px 24px;
    }
    
    .course-content {
        padding: 24px;
    }
    
    .workshop-grid {
        grid-template-columns: 1fr;
    }
    
    .spec-item {
        flex-direction: column;
        padding: 16px;
    }
    
    .spec-number {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }
    
    .workshop-reference-header {
        padding: 24px;
    }
    
    .workshop-reference-title {
        font-size: 22px;
    }
    
    .workshop-reference-content {
        padding: 0 24px 24px;
    }
    
    .workshop-image-placeholder {
        min-height: 300px;
        padding: 40px 20px;
    }
    
    .placeholder-icon {
        width: 80px;
        height: 80px;
    }
    
    .placeholder-icon i {
        font-size: 36px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 32px 24px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}
 
/* モバイル (480px以下) */
@media (max-width: 480px) {
    .hero-split {
        grid-template-columns: 1fr;
    }

    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }

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

    .hero-example-item {
        padding: 12px;
    }

    .hero-example-text h5 {
        font-size: 13px;
    }

    .hero-example-text p {
        font-size: 11px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
    
    .btn-large {
        padding: 14px 32px;
        font-size: 16px;
    }
    
    .section-title {
        font-size: 24px;
        line-height: 1.3;
    }
    
    .about-icon {
        width: 60px;
        height: 60px;
        font-size: 28px;
    }
    
    .about-card h3 {
        font-size: 20px;
    }
    
    .use-case-title {
        font-size: 20px;
    }
    
    .use-case-goal {
        font-size: 13px;
        padding: 6px 10px;
    }
    
    .use-case-info-item {
        padding: 16px;
    }
    
    .info-value {
        font-size: 14px;
    }
    
    .highlight-metric {
        font-size: 16px;
    }
    
    .flow-step {
        padding: 16px;
    }
    
    .flow-step-number {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }
    
    .flow-step-title {
        font-size: 14px;
    }
    
    .flow-step-description {
        font-size: 13px;
    }
    
    .prompt-box {
        padding: 16px;
        font-size: 13px;
    }
    
    .course-number {
        font-size: 32px;
    }
    
    .course-title {
        font-size: 20px;
    }
    
    .workshop-reference-title {
        font-size: 20px;
    }
    
    .workshop-reference-description {
        font-size: 14px;
    }
    
    .workshop-image-placeholder {
        min-height: 250px;
        padding: 30px 16px;
    }
    
    .placeholder-icon {
        width: 70px;
        height: 70px;
    }
    
    .placeholder-icon i {
        font-size: 32px;
    }
    
    .placeholder-text {
        font-size: 18px;
    }
    
    .placeholder-subtext {
        font-size: 13px;
    }
}
 
/* ========================================
   ギャラリー・セミナー写真セクション
======================================== */
.seminar-gallery {
    padding: 100px 0;
    background-color: var(--white);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    /* grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); */
    gap: 32px;
    margin-top: 40px;
}

.gallery-item {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
}

.gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.gallery-image {
    width: 100%;
    height: auto;
    display: block;
    min-height: 300px;
    object-fit: cover;
}

.gallery-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    background: var(--gray-100);
    min-height: 300px;
}

.gallery-placeholder .placeholder-icon {
    display: none;
}

.placeholder-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
}

/* スムーススクロール */
html {
    scroll-behavior: smooth;
}
 
/* アクセシビリティ: フォーカス表示 */
a:focus,
button:focus,
input:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 動画用 */
.workshop-screenshot {
  background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-50) 100%);
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 120, 212, 0.15);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.workshop-screenshot:hover {
  box-shadow: 0 20px 60px rgba(0, 120, 212, 0.25);
  transform: translateY(-4px);
}

.responsive-video {
  width: 100%;
  height: auto;
  display: block;
  max-width: 100%;
  border-radius: 12px;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: transform var(--transition-normal);
  background: #000;
}

.responsive-video:hover {
  transform: scale(1.02);
}