/* ========================================
   TransStudent - ランディングページ CSS（青系統一）
   ======================================== */

/* 基本設定 - 青系統一 */
:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --primary-light: #5dade2;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --text-color: #333;
    --text-light: #666;
    --border-color: #e0e0e0;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 5px 20px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

/* STEAM Labo用ダークテーマ */
body.steam-system {
    --text-color: #f8fafc;
    --text-light: #94a3b8;
    --secondary-color: #e2e8f0;
    --border-color: #334155;
    --bg-light: #0f172a;
    --white: #1e293b;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 10px 15px rgba(0, 0, 0, 0.3);
    
    background-color: #0f172a;
    color: var(--text-color);
}

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

body {
    font-family: 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'ヒラギノ角ゴ ProN W3', Meiryo, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

/* コンテナ */
.landing-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

body.steam-system .feature-card,
body.steam-system .benefit-item,
body.steam-system .pricing-card,
body.steam-system .pricing-simulator,
body.steam-system .volume-discount-table,
body.steam-system .screenshot-item,
body.steam-system .target-user-item,
body.steam-system .pricing-card-special,
body.steam-system .contact-section {
    background-color: #1e293b;
    border-color: #334155;
    color: #f8fafc;
}

body.steam-system .feature-card p,
body.steam-system .benefit-item p,
body.steam-system .pricing-card p,
body.steam-system .target-user-item p,
body.steam-system .screenshot-item p {
    color: #94a3b8;
}

body.steam-system .feature-card h3,
body.steam-system .benefit-item h3,
body.steam-system .pricing-card h3,
body.steam-system .target-user-item h3,
body.steam-system .screenshot-item h3 {
    color: #e2e8f0;
}

body.steam-system .contact-form-wrapper {
    background-color: #0f172a;
    border: 1px solid #334155;
}

body.steam-system .contact-form label {
    color: #e2e8f0;
}

body.steam-system .contact-form input,
body.steam-system .contact-form select,
body.steam-system .contact-form textarea {
    background-color: #1e293b;
    border-color: #334155;
    color: #f8fafc;
}

body.steam-system .contact-form input:focus,
body.steam-system .contact-form select:focus,
body.steam-system .contact-form textarea:focus {
    border-color: var(--primary-color);
}

body.steam-system .pricing-tier {
    background-color: #0f172a;
    border-color: #334155;
}

body.steam-system .tier-range,
body.steam-system .volume-discount-table h3,
body.steam-system .pricing-simulator h3,
body.steam-system .simulator-input label {
    color: #e2e8f0;
}

body.steam-system .simulator-input input {
    background-color: #1e293b;
    border-color: #334155;
    color: #f8fafc;
}

body.steam-system .pricing-notes {
    background-color: #0f172a;
}

body.steam-system .pricing-notes li {
    color: #94a3b8;
}

/* ========================================
   ヘッダー
   ======================================== */
.landing-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
}

body.steam-system .landing-header {
    background-color: rgba(15, 23, 42, 0.9);
    border-bottom: 1px solid #334155;
    backdrop-filter: blur(10px);
}

body.steam-system .landing-nav a,
body.steam-system .mobile-menu-toggle {
    color: #f8fafc;
}

body.steam-system .landing-nav a:hover {
    color: var(--primary-color);
}

.landing-nav {
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.logo i {
    font-size: 32px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.btn-login {
    background: var(--primary-color);
    color: var(--white) !important;
    padding: 10px 20px;
    border-radius: 5px;
    transition: var(--transition);
}

.btn-login:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-color);
}

/* ========================================
   ヒーローセクション
   ======================================== */
.hero-section {
    padding: 40px 0 60px;
    background: linear-gradient(135deg, #ffffff 0%, #e3f2fd 100%);
    color: var(--text-color);
}

body.learning-system .hero-section {
    background: linear-gradient(135deg, #ffffff 0%, #fff5e6 100%);
}

body.steam-system .hero-section {
    background: linear-gradient(135deg, #0f172a 0%, #1a1a2e 100%);
}

body.bizfrontier-system .hero-section {
    background: linear-gradient(135deg, #ffffff 0%, #ffebe6 100%);
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 20px;
    font-weight: bold;
    color: var(--secondary-color);
}

.hero-title .highlight {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 30px;
    color: var(--text-light);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-image {
    margin-top: 40px;
}

.hero-image-placeholder {
    background: var(--white);
    border-radius: 20px;
    padding: 60px;
    text-align: center;
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow);
    min-height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

body.learning-system .hero-image-placeholder {
    background: #fff5e6;
}

body.steam-system .hero-image-placeholder {
    background: #1e293b;
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
}

body.bizfrontier-system .hero-image-placeholder {
    background: #ffebe6;
    border-color: var(--primary-color);
}

/* 背景画像が設定されている場合はアイコンとテキストを隠す */
.hero-image-placeholder[style*="background-image"] i,
.hero-image-placeholder[style*="background-image"] p {
    display: none;
}

/* スクリーンショットエリアで背景画像が設定されている場合もアイコンとテキストを隠す */
.screenshot-placeholder[style*="background-image"] > i,
.screenshot-placeholder[style*="background-image"] > p {
    display: none;
}

.hero-image-placeholder i {
    font-size: 120px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.hero-image-placeholder p {
    font-size: 20px;
    font-weight: 500;
    color: var(--text-light);
}

/* ヒーロー背景画像の設定 */
.hero-image-placeholder.transport-bg {
    background-image: url('../images/screenshots/hero-bg.png');
}

.hero-image-placeholder.learning-bg {
    background-image: url('../images/screenshots/lesson-bg.png');
}

.hero-image-placeholder.steam-bg {
    background-image: url('../images/screenshots/steam-hero.png');
}

.hero-image-placeholder.bizfrontier-bg {
    background-image: url('../images/screenshots/bizfrontier-hero.png');
}

/* ========================================
   お悩みセクション
   ======================================== */
.problems-section {
    background: linear-gradient(135deg, #e3f2fd 0%, #d6eaf8 100%);
    padding: 50px 0;
}

body.learning-system .problems-section {
    background: linear-gradient(135deg, #fff5e6 0%, #ffe6cc 100%);
}

body.steam-system .problems-section {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 30px;
    margin-bottom: 30px;
}

.problem-item {
    background: var(--white);
    border-radius: 10px;
    padding: 20px 15px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    border-left: 4px solid var(--accent-color);
}

.problem-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.problem-icon {
    margin-bottom: 12px;
}

.problem-icon i {
    font-size: 40px;
    color: var(--accent-color);
    opacity: 0.85;
}

.problem-item p {
    color: var(--text-color);
    font-size: 15px;
    line-height: 1.6;
    font-weight: 500;
}

.problems-cta {
    text-align: center;
    margin-top: 35px;
}

.problems-cta-text {
    background: var(--primary-color);
    color: var(--white);
    padding: 25px 35px;
    border-radius: 12px;
    font-size: 18px;
    line-height: 1.6;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
    display: inline-block;
    max-width: 600px;
}

body.learning-system .problems-cta-text {
    box-shadow: 0 4px 15px rgba(255, 153, 0, 0.3);
}

body.steam-system .problems-cta-text {
    background-color: #6366f1 !important;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    color: #ffffff !important;
}

.problems-cta-text i {
    font-size: 24px;
    margin-bottom: 8px;
    display: block;
    animation: bounce 2s infinite;
}

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

.problems-cta-text strong {
    font-size: 24px;
    text-decoration: underline;
}

/* ========================================
   ボタン
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

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

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

.btn-large {
    padding: 15px 30px;
    font-size: 18px;
}

/* ========================================
   セクション共通
   ======================================== */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 50px;
}

/* ========================================
   機能セクション
   ======================================== */
.features-section {
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 30px;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--primary-color);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon i {
    font-size: 36px;
    color: var(--white);
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.feature-card p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    padding: 8px 0 8px 25px;
    position: relative;
    color: var(--text-light);
}

.feature-list li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* ========================================
   メリットセクション
   ======================================== */
.benefits-section {
    background: var(--bg-light);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.benefit-item {
    text-align: center;
    padding: 30px;
    background: var(--white);
    border-radius: 15px;
    transition: var(--transition);
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.benefit-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.benefit-icon i {
    font-size: 40px;
    color: var(--white);
}

.benefit-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.benefit-item p {
    color: var(--text-light);
}

/* ========================================
   画面紹介セクション
   ======================================== */
.screenshots-section {
    background: var(--white);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.screenshot-item {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.screenshot-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.screenshot-image {
    width: 100%;
    background: var(--bg-light);
}

.screenshot-placeholder {
    padding: 60px 20px;
    text-align: center;
    background: rgba(52, 152, 219, 0.08);
    background-size: 100% auto !important;
    background-repeat: no-repeat !important;
    background-position: center top !important;
    position: relative;
    overflow: hidden;
}

body.learning-system .screenshot-placeholder {
    background: rgba(255, 153, 0, 0.08);
}

body.steam-system .screenshot-placeholder {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid var(--border-color);
}

.screenshot-placeholder i {
    font-size: 64px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.screenshot-placeholder p {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 500;
}

.screenshot-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    color: white;
}

.screenshot-placeholder:hover .screenshot-overlay {
    opacity: 1;
}

.screenshot-overlay i {
    font-size: 48px;
    margin-bottom: 10px;
}

.screenshot-overlay span {
    font-size: 16px;
    font-weight: 500;
}

.screenshot-item h3 {
    padding: 20px;
    font-size: 20px;
    color: var(--secondary-color);
}

.screenshot-item > p {
    padding: 0 20px 20px;
    color: var(--text-light);
}

/* ========================================
   対象ユーザーセクション
   ======================================== */
.target-users-section {
    background: var(--bg-light);
}

.target-users-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.target-user-item {
    text-align: center;
    padding: 40px 30px;
    background: var(--white);
    border-radius: 15px;
    transition: var(--transition);
}

.target-user-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.target-user-item i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.target-user-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.target-user-item p {
    color: var(--text-light);
}

/* ========================================
   料金体系セクション
   ======================================== */
.pricing-section {
    background: var(--bg-light);
    padding: 60px 0;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.pricing-card {
    background: var(--white);
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.pricing-card.highlight {
    border: 2px solid var(--primary-color);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.pricing-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
}

.pricing-icon i {
    font-size: 30px;
    color: var(--white);
}

.pricing-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.price {
    margin: 20px 0;
}

.price-amount {
    font-size: 40px;
    font-weight: bold;
    color: var(--primary-color);
}

.price-unit {
    font-size: 16px;
    color: var(--text-light);
    margin-left: 8px;
}

.price-description {
    color: var(--text-light);
    font-size: 14px;
}

/* 初期費用カード（単独） */
.pricing-intro {
    margin-bottom: 40px;
    display: flex;
    justify-content: center;
}

.pricing-card-special {
    background: var(--white);
    border-radius: 12px;
    padding: 30px 40px;
    text-align: center;
    box-shadow: var(--shadow);
    max-width: 350px;
}

.pricing-card-special .pricing-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
}

.pricing-card-special .pricing-icon i {
    font-size: 30px;
    color: var(--white);
}

.pricing-card-special h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

/* ボリュームディスカウント料金表 */
.volume-discount-table {
    background: var(--white);
    border-radius: 15px;
    padding: 40px 35px;
    box-shadow: var(--shadow);
    margin-bottom: 40px;
}

.volume-discount-table h3 {
    font-size: 26px;
    margin-bottom: 10px;
    color: var(--secondary-color);
    text-align: center;
}

.volume-discount-table h3 i {
    color: var(--primary-color);
    margin-right: 10px;
}

.volume-discount-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 35px;
    font-size: 15px;
}

.pricing-tiers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.pricing-tier {
    background: var(--bg-light);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 25px 15px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.pricing-tier:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.pricing-tier.highlighted {
    background: rgba(52, 152, 219, 0.08);
    border: 2px solid var(--primary-color);
    transform: scale(1.05);
}

body.learning-system .pricing-tier.highlighted {
    background: rgba(255, 153, 0, 0.08);
}

body.steam-system .pricing-tier.highlighted {
    background: rgba(99, 102, 241, 0.1);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.2);
}

.pricing-tier.highlighted:hover {
    transform: scale(1.05) translateY(-5px);
}

.pricing-tier.premium {
    border: 2px solid var(--primary-dark);
}

body.transport-system .pricing-tier.premium {
    background: rgba(41, 128, 185, 0.08);
}

body.learning-system .pricing-tier.premium {
    background: rgba(204, 122, 0, 0.08);
}

body.steam-system .pricing-tier.premium {
    background: rgba(99, 102, 241, 0.15);
}

.tier-popular {
    position: absolute;
    top: 10px;
    right: -30px;
    background: var(--primary-color);
    color: var(--white);
    padding: 3px 35px;
    font-size: 12px;
    font-weight: bold;
    transform: rotate(45deg);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.tier-header {
    margin-bottom: 15px;
}

.tier-range {
    font-size: 18px;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 8px;
}

.tier-badge {
    display: inline-block;
    background: var(--secondary-color);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.tier-badge-discount {
    background: var(--primary-color);
}

.tier-badge-premium {
    background: var(--primary-dark);
}

.tier-price {
    margin: 20px 0;
}

.tier-amount {
    font-size: 36px;
    font-weight: bold;
    color: var(--primary-color);
}

.pricing-tier.premium .tier-amount {
    color: var(--primary-dark);
}

.tier-unit {
    font-size: 14px;
    color: var(--text-light);
    margin-left: 3px;
}

.tier-example {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.tier-example small {
    color: var(--text-light);
    font-size: 13px;
    display: block;
    line-height: 1.6;
}

.tier-example strong {
    color: var(--primary-color);
    font-size: 18px;
    display: block;
    margin-top: 5px;
}

.pricing-tier.premium .tier-example strong {
    color: var(--primary-dark);
}

/* 料金シミュレーター */
.pricing-simulator {
    background: var(--white);
    border-radius: 15px;
    padding: 35px;
    box-shadow: var(--shadow);
    max-width: 700px;
    margin: 0 auto;
}

.pricing-simulator h3 {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--secondary-color);
    text-align: center;
}

.pricing-simulator > p {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 30px;
    font-size: 14px;
}

.simulator-content {
    margin-bottom: 30px;
}

.simulator-input {
    margin-bottom: 30px;
}

.simulator-input label {
    display: block;
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--secondary-color);
    text-align: center;
}

.simulator-input label sup {
    color: var(--primary-color);
    font-size: 14px;
}

.input-with-unit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.input-note {
    margin-top: 10px;
    font-size: 12px;
    color: var(--text-light);
    text-align: center;
    line-height: 1.5;
}

.input-note sup {
    color: var(--primary-color);
}

.simulator-input input {
    width: 180px;
    padding: 12px 15px;
    font-size: 20px;
    text-align: center;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
}

.simulator-input input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 153, 0, 0.1);
}

.input-with-unit .unit {
    font-size: 18px;
    color: var(--text-light);
    font-weight: 500;
}

.simulator-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.result-item {
    background: rgba(52, 152, 219, 0.1);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
}

body.learning-system .result-item {
    background: rgba(255, 153, 0, 0.1);
}

body.steam-system .result-item {
    background: rgba(99, 102, 241, 0.15);
}

.result-label {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 8px;
    font-weight: 500;
}

.result-value {
    font-size: 30px;
    font-weight: bold;
    color: var(--primary-color);
}

.result-value .currency {
    font-size: 20px;
    margin-right: 3px;
}

.pricing-notes {
    background: var(--bg-light);
    border-radius: 10px;
    padding: 25px;
}

.pricing-notes ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

.pricing-notes li {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-color);
    font-size: 14px;
}

.pricing-notes li i {
    color: var(--success-color);
    font-size: 16px;
}

/* レスポンシブ */
@media (max-width: 768px) {
    .pricing-section {
        padding: 40px 0;
    }
    
    .pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .volume-discount-table {
        padding: 25px 15px;
    }
    
    .volume-discount-table h3 {
        font-size: 20px;
    }
    
    .pricing-tiers {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .pricing-tier.highlighted {
        transform: scale(1.0);
    }
    
    .pricing-tier.highlighted:hover {
        transform: scale(1.0) translateY(-5px);
    }
    
    .tier-range {
        font-size: 16px;
    }
    
    .tier-amount {
        font-size: 28px;
    }
    
    .pricing-simulator {
        padding: 25px 15px;
    }
    
    .simulator-input input {
        width: 140px;
        font-size: 18px;
    }
    
    .result-value {
        font-size: 24px;
    }
    
    .pricing-notes ul {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   お問い合わせセクション
   ======================================== */
.contact-section {
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 50px;
    margin-top: 50px;
}

.contact-info h3 {
    font-size: 24px;
    margin-bottom: 30px;
    color: var(--secondary-color);
}

.contact-info-item {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.contact-info-item i {
    font-size: 24px;
    color: var(--primary-color);
    margin-top: 5px;
}

.contact-info-item strong {
    display: block;
    margin-bottom: 5px;
    color: var(--secondary-color);
}

.contact-info-item p {
    color: var(--text-light);
}

.contact-form-wrapper {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 15px;
}

.contact-form .form-group {
    margin-bottom: 25px;
}

.contact-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--secondary-color);
}

.contact-form .required {
    color: var(--accent-color);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
    transition: var(--transition);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.contact-form textarea {
    resize: vertical;
}

.contact-form .form-actions {
    text-align: center;
    margin-top: 30px;
}

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

.contact-form .btn-primary:hover {
    background: var(--primary-dark);
}

/* ========================================
   フッター
   ======================================== */
body.steam-system .landing-footer {
    background-color: #0f172a !important;
    border-top: 1px solid #334155;
    color: #f8fafc !important;
}

.landing-footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--white);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   ページトップボタン
   ======================================== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

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

.scroll-to-top:hover {
    background: #2980b9;
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* ========================================
   レスポンシブデザイン
   ======================================== */

/* タブレット */
@media (max-width: 992px) {
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .features-grid,
    .screenshots-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* スマートフォン */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
        display: none;
        gap: 20px;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .concept-message-section {
        padding-top: 110px;
        padding-bottom: 20px;
    }
    
    .concept-title {
        font-size: 1.3rem;
    }
    
    .concept-title .ruby-text {
        font-size: 0.75rem;
        display: block;
        margin-left: 0;
        margin-top: 5px;
    }
    
    .concept-subtitle {
        font-size: 0.9rem;
    }
    
    .concept-text {
        font-size: 0.85rem;
    }
    
    .hero-section {
        padding: 30px 0 40px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }
    
    .problems-section {
        padding: 35px 0;
    }
    
    .problems-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    
    .problem-item {
        padding: 18px 12px;
    }
    
    .problem-icon i {
        font-size: 36px;
    }
    
    .problem-item p {
        font-size: 14px;
    }
    
    .problems-cta {
        margin-top: 25px;
    }
    
    .problems-cta-text {
        font-size: 15px;
        padding: 20px 25px;
    }
    
    .problems-cta-text strong {
        font-size: 17px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
    
    section {
        padding: 50px 0;
    }
    
    .features-grid,
    .benefits-grid,
    .screenshots-grid,
    .target-users-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        padding: 30px 20px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .landing-container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 24px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .hero-image-placeholder {
        padding: 40px 20px;
    }
    
    .hero-image-placeholder i {
        font-size: 80px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .btn-large {
        padding: 12px 20px;
        font-size: 16px;
    }
}

/* ========================================
   アニメーション
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* スムーズスクロール */
html {
    scroll-behavior: smooth;
}

/* ========================================
   ライトボックス（画像拡大表示）
   ======================================== */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox-overlay.active {
    opacity: 1;
}

.lightbox-container {
    position: relative;
    width: 90%;
    height: 90%;
    max-width: 1400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.lightbox-content {
    position: relative;
    max-width: 100%;
    max-height: calc(100% - 150px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    transition: opacity 0.3s ease;
}

.lightbox-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 48px;
    display: none;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid white;
    border-radius: 50%;
    color: white;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.lightbox-close:hover {
    background: white;
    color: #333;
    transform: rotate(90deg);
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 95%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid white;
    border-radius: 50%;
    color: white;
    font-size: 28px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background: white;
    color: #333;
    transform: translateY(-50%) scale(1.1);
}

.lightbox-info {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 15px 30px;
    border-radius: 25px;
    display: flex;
    gap: 20px;
    align-items: center;
    max-width: 80%;
}

.lightbox-counter {
    font-weight: bold;
    white-space: nowrap;
}

.lightbox-caption {
    text-align: center;
    display: none;
}

.lightbox-thumbnails {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    max-width: 90%;
    overflow-x: auto;
    padding: 10px;
}

.lightbox-thumbnail {
    width: 80px;
    height: 60px;
    background-size: cover;
    background-position: center;
    border: 3px solid transparent;
    border-radius: 5px;
    cursor: pointer;
    flex-shrink: 0;
    transition: var(--transition);
    opacity: 0.6;
}

.lightbox-thumbnail:hover {
    opacity: 1;
    transform: scale(1.1);
}

.lightbox-thumbnail.active {
    border-color: white;
    opacity: 1;
}

/* ライトボックス - レスポンシブ */
@media (max-width: 768px) {
    .lightbox-container {
        width: 95%;
        height: 95%;
    }
    
    .lightbox-close {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
        font-size: 20px;
    }
    
    .lightbox-prev,
    .lightbox-next {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }
    
    .lightbox-prev {
        left: 10px;
    }
    
    .lightbox-next {
        right: 10px;
    }
    
    .lightbox-info {
        bottom: 70px;
        flex-direction: column;
        gap: 5px;
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .lightbox-thumbnails {
        display: none;
    }
}

/* ========================================
   動画表示スタイル
   ======================================== */
.screenshot-overlay video {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.screenshot-placeholder {
    position: relative;
    cursor: pointer;
}

.screenshot-placeholder video {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.screenshot-item:hover .screenshot-placeholder video {
    display: block;
}

/* 学習管理システムの動画プレビュー */
.system-content.learning .screenshot-overlay {
    position: relative;
    height: 0;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
}

.system-content.learning .screenshot-overlay video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* ========================================
   印刷用スタイル
   ======================================== */
@media print {
    .landing-header,
    .scroll-to-top,
    .hero-buttons,
    .contact-form-wrapper,
    .landing-footer,
    .lightbox-overlay {
        display: none;
    }
    
    section {
        page-break-inside: avoid;
    }
}

/* ========================================
   コンセプトメッセージセクション
   ======================================== */
.concept-message-section {
    background: var(--bg-light);
    padding-top: 100px;
    padding-bottom: 20px;
    text-align: center;
}

.concept-message-box {
    max-width: 800px;
    margin: 0 auto;
}

.concept-title {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 25px;
    font-weight: bold;
}

.concept-title .ruby-text {
    font-size: 0.9rem;
    font-weight: normal;
    color: var(--text-light);
    margin-left: 5px;
}

.concept-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    font-weight: normal;
    display: block;
    margin-top: 10px;
}

.concept-text {
    line-height: 2;
    color: var(--text-color);
    font-size: 1.1rem;
}

/* Learning System テーマ */
body.learning-system .concept-message-section {
    background: linear-gradient(to bottom, #fff5e6, #ffffff);
}

/* STEAM System テーマ */
body.steam-system .concept-message-section {
    background: linear-gradient(to bottom, #1e293b, #0f172a);
    border-bottom: 1px solid #334155;
}

/* BizFrontier System テーマ */
body.bizfrontier-system .concept-message-section {
    background: linear-gradient(to bottom, #ffebe6, #ffffff);
}

body.steam-system .concept-title {
    color: #f8fafc;
}

body.steam-system .concept-title .ruby-text {
    color: #94a3b8;
}

body.steam-system .concept-subtitle {
    color: #94a3b8;
}

body.steam-system .concept-text {
    color: #cbd5e1;
}