/* ブランドカラー変数定義 */
:root {
    /* ブランドカラー */
    --primary-color: #00BCD4;
    --primary-color-dark: #0097A7;
    --accent-color: #FF4081;
    --accent-color-dark: #F50057;
    --text-color: #333;
    --text-color-light: #555;
    --background-color: #ffffff;
    --background-color-light: #f5f9fc;
    
    /* グラデーション */
    --primary-gradient: linear-gradient(135deg, var(--primary-color), var(--primary-color-dark));
    /* --header-gradient: linear-gradient(135deg, #00BCD4, #00ACC1); */ /* ヘッダー用の明るめのグラデーション（未使用） */
    --hero-gradient: linear-gradient(135deg, #00BCD4, #0097A7); /* サイト共通のメイングラデーション */
    --accent-gradient: linear-gradient(to right, var(--primary-color), var(--accent-color));
}

/* 全体のリセットとベーススタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', 'Montserrat', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
}

a {
    text-decoration: none;
    color: #00BCD4;
    transition: all 0.3s ease;
}

a:hover {
    color: #0097A7;
}

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

.section-title {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.5rem;
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    font-weight: 600;
    color: #333;
    position: relative;
    padding-bottom: 15px;
    letter-spacing: 0.5px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: #00BCD4;
    border-radius: 4px;
}

/* プレースホルダー画像のスタイル */
.placeholder-img {
    background-color: #e0e0e0;
    border: 2px dashed #bdbdbd;
    border-radius: 8px;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #757575;
    font-weight: bold;
    font-size: 1.2rem;
}

.placeholder-img::before {
    content: 'スクリーンショットが入ります';
}

/* サイトヘッダー */
.site-header {
    background: var(--hero-gradient);
    color: #fff;
    padding: 20px 0;
    position: relative;
    overflow: hidden;
}

.site-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 20%);
    z-index: 1;
}

.site-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--accent-gradient);
    z-index: 3;
}

.site-header .container {
    position: relative;
    z-index: 2;
}

/* ナビゲーションバー */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo h1 {
    font-size: 2rem;
    color: #fff;
    font-weight: 700;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    color: #fff;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-links a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* ヒーローセクション */
.hero, .hero-section {
    background: var(--hero-gradient);
    color: #fff;
    padding: 80px 0;
    margin-bottom: 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 20%);
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-top: 50px;
}

.hero-text {
    flex: 1;
}

.hero-text h2 {
    font-size: 3.2rem;
    margin-bottom: 25px;
    line-height: 1.2;
    font-weight: 700;
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.5px;
}

.hero-text p {
    font-size: 1.25rem;
    margin-bottom: 35px;
    opacity: 0.95;
    line-height: 1.7;
}

.hero-image {
    flex: 1;
    position: relative;
}

.hero-image img {
    border-radius: 16px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.5s ease;
}

.hero-image img:hover {
    transform: translateY(-5px);
}

.cta-button {
    display: inline-block;
    background-color: #FF4081;
    color: #fff;
    padding: 16px 36px;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(255, 64, 129, 0.3);
    letter-spacing: 0.5px;
}

.cta-button:hover {
    background-color: #F50057;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255, 64, 129, 0.4);
}

/* コンセプトセクション */
.concept {
    padding: 100px 0;
    position: relative;
}

.concept::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle at 80% 20%, rgba(0, 188, 212, 0.05) 0%, transparent 50%);
    z-index: -1;
}

.concept-content {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 80px;
}

.concept-text {
    flex: 1;
}

.concept-text h3 {
    font-size: 2.2rem;
    margin-bottom: 25px;
    color: #00BCD4;
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.concept-text p {
    font-size: 1.15rem;
    margin-bottom: 25px;
    line-height: 1.8;
    color: #444;
}

.concept-image {
    flex: 1;
}

.concept-image img {
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    transition: all 0.5s ease;
}

.concept-image img:hover {
    transform: scale(1.02);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

.learning-cycle {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 60px;
}

.cycle-item {
    text-align: center;
    width: 130px;
}

.cycle-icon {
    width: 90px;
    height: 90px;
    background-color: #e3f2fd;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
    color: #00BCD4;
    font-size: 2rem;
    transition: all 0.4s ease;
    box-shadow: 0 5px 15px rgba(0, 188, 212, 0.1);
}

.cycle-item:hover .cycle-icon {
    background-color: #00BCD4;
    color: #fff;
    transform: scale(1.1) translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 188, 212, 0.2);
}

.cycle-item h4 {
    font-weight: 600;
    color: #444;
    font-size: 1.1rem;
    transition: color 0.3s ease;
}

.cycle-item:hover h4 {
    color: #00BCD4;
}

.cycle-arrow {
    font-size: 2rem;
    color: #00BCD4;
    margin: 0 15px;
    transition: transform 0.3s ease;
}

.cycle-arrow:hover {
    transform: scale(1.2);
}

/* 特徴セクション */
.features {
    padding: 100px 0;
    background-color: #f5f9fc;
    position: relative;
    overflow: hidden;
}

.features::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background-color: rgba(0, 188, 212, 0.05);
    border-radius: 50%;
    z-index: 0;
}

.features::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -100px;
    width: 300px;
    height: 300px;
    background-color: rgba(0, 188, 212, 0.03);
    border-radius: 50%;
    z-index: 0;
}

.features .container {
    position: relative;
    z-index: 1;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.feature-card {
    background-color: #fff;
    border-radius: 16px;
    padding: 35px 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(20px);
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.feature-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
    border-color: rgba(0, 188, 212, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background-color: #e3f2fd;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: #00BCD4;
    font-size: 2rem;
    transition: all 0.4s ease;
    box-shadow: 0 5px 15px rgba(0, 188, 212, 0.1);
}

.feature-card:hover .feature-icon {
    background-color: #00BCD4;
    color: #fff;
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(0, 188, 212, 0.2);
}

.feature-card h3 {
    text-align: center;
    margin-bottom: 18px;
    color: #00BCD4;
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    font-weight: 600;
    font-size: 1.4rem;
    letter-spacing: 0.5px;
}

.feature-card p {
    text-align: center;
    color: #555;
    line-height: 1.7;
    font-size: 1.05rem;
}

.screenshot-container {
    margin-top: 70px;
    text-align: center;
    position: relative;
}

.screenshot-container img {
    border-radius: 16px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.5s ease;
    max-width: 90%;
}

.screenshot-container img:hover {
    transform: scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* 使い方セクション */
.how-to-use {
    padding: 100px 0;
    position: relative;
}

.how-to-use::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle at 10% 80%, rgba(0, 188, 212, 0.05) 0%, transparent 50%);
    z-index: -1;
}

.steps {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 40px;
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.6s ease;
    position: relative;
    padding: 20px;
    border-radius: 16px;
}

.step.animate {
    opacity: 1;
    transform: translateX(0);
}

.step:hover {
    background-color: rgba(0, 188, 212, 0.03);
}

.step-number {
    width: 70px;
    height: 70px;
    background-color: #00BCD4;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 8px 20px rgba(0, 188, 212, 0.2);
    transition: all 0.4s ease;
    font-family: 'Montserrat', sans-serif;
}

.step:hover .step-number {
    transform: scale(1.1);
    box-shadow: 0 10px 25px rgba(0, 188, 212, 0.3);
}

.step-content {
    flex: 1;
    padding-top: 10px;
}

.step-content h3 {
    font-size: 1.6rem;
    margin-bottom: 20px;
    color: #00BCD4;
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.step-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #444;
    margin-bottom: 15px;
}

.step-image {
    flex: 1;
    max-width: 450px;
    position: relative;
}

.step-image img {
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    transition: all 0.5s ease;
}

.step-image img:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

/* 対応言語セクション */
.languages {
    padding: 100px 0;
    background-color: #f5f9fc;
    position: relative;
    overflow: hidden;
}

.languages::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    background-color: rgba(0, 188, 212, 0.03);
    border-radius: 50%;
    z-index: 0;
}

.languages .container {
    position: relative;
    z-index: 1;
}

.languages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 35px;
    margin-bottom: 60px;
}

.language-card {
    background-color: #fff;
    border-radius: 16px;
    padding: 35px 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    text-align: center;
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(20px);
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.language-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.language-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
    border-color: rgba(0, 188, 212, 0.1);
}

.language-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
    transition: transform 0.4s ease;
}

.language-card:hover .language-icon {
    transform: scale(1.2);
}

.language-card h3 {
    color: #333;
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    font-weight: 600;
    font-size: 1.2rem;
    margin-top: 10px;
    transition: color 0.3s ease;
}

.language-card:hover h3 {
    color: #00BCD4;
}

.feature-card.coming-soon,
.language-card.coming-soon {
    background-color: #f8f8f8;
    color: #757575;
    border: 1px dashed #e0e0e0;
}

.coming-soon-label {
    display: inline-block;
    font-size: 0.7rem;
    background-color: #FF4081;
    color: white;
    padding: 3px 8px;
    border-radius: 20px;
    margin-left: 5px;
    vertical-align: middle;
    font-weight: 500;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 5px rgba(255, 64, 129, 0.2);
}

/* ユーザー向け補足情報セクション */
.info {
    padding: 100px 0;
    position: relative;
}

.info::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle at 90% 30%, rgba(0, 188, 212, 0.05) 0%, transparent 50%);
    z-index: -1;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.info-card {
    background-color: #fff;
    border-radius: 16px;
    padding: 40px 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    text-align: center;
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(20px);
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.info-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.info-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
    border-color: rgba(0, 188, 212, 0.1);
}

.info-icon {
    width: 80px;
    height: 80px;
    background-color: #e3f2fd;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: #00BCD4;
    font-size: 2rem;
    transition: all 0.4s ease;
    box-shadow: 0 5px 15px rgba(0, 188, 212, 0.1);
}

.info-card:hover .info-icon {
    background-color: #00BCD4;
    color: #fff;
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(0, 188, 212, 0.2);
}

.info-card h3 {
    margin-bottom: 18px;
    color: #00BCD4;
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    font-weight: 600;
    font-size: 1.4rem;
    letter-spacing: 0.5px;
}

.info-card p {
    color: #555;
    line-height: 1.7;
    font-size: 1.05rem;
}

/* よくある質問セクション */
.faq {
    padding: 100px 0;
    background-color: #f5f9fc;
    position: relative;
    overflow: hidden;
}

.faq::before {
    content: '';
    position: absolute;
    top: -50px;
    left: -50px;
    width: 200px;
    height: 200px;
    background-color: rgba(0, 188, 212, 0.05);
    border-radius: 50%;
    z-index: 0;
}

.faq .container {
    position: relative;
    z-index: 1;
}

.faq-list {
    max-width: 850px;
    margin: 0 auto;
}

.faq-item {
    background-color: #fff;
    border-radius: 16px;
    margin-bottom: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.03);
    transition: all 0.4s ease;
}

.faq-item:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 188, 212, 0.1);
}

.faq-question {
    padding: 25px 30px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background-color: rgba(0, 188, 212, 0.03);
}

.faq-question h3 {
    font-size: 1.25rem;
    color: #444;
    margin: 0;
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    font-weight: 600;
    transition: color 0.3s ease;
}

.faq-item:hover .faq-question h3 {
    color: #00BCD4;
}

.toggle-icon {
    font-size: 1.5rem;
    color: #00BCD4;
    transition: transform 0.3s ease;
}

.faq-question:hover .toggle-icon {
    transform: scale(1.2);
}

.faq-answer {
    padding: 0 30px 25px;
    color: #555;
    line-height: 1.7;
    font-size: 1.05rem;
}

/* CTA セクション */
.cta {
    padding: 100px 0;
    text-align: center;
    background: var(--hero-gradient);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 30%);
    z-index: 1;
}

.cta .container {
    position: relative;
    z-index: 2;
}

.cta h2 {
    font-size: 2.8rem;
    margin-bottom: 25px;
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.cta p {
    font-size: 1.25rem;
    margin-bottom: 35px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.95;
    line-height: 1.7;
}

.app-image {
    margin-top: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
}

.app-image img {
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    transition: all 0.5s ease;
}

.app-image img:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
}

/* フッター */
.footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 80px 0 20px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--accent-gradient);
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 50px;
}

.footer-logo h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    font-weight: 700;
    color: #fff;
}

.footer-logo p {
    color: #bbb;
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 60px;
}

.footer-section h3 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    color: #00BCD4;
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    font-weight: 600;
    letter-spacing: 0.5px;
}

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

.footer-section li {
    margin-bottom: 15px;
}

.footer-section a {
    color: #ddd;
    transition: all 0.3s ease;
    font-size: 1.05rem;
    position: relative;
    padding-left: 0;
}

.footer-section a:hover {
    color: #00BCD4;
    padding-left: 5px;
}

.footer-section a::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: #00BCD4;
    transition: width 0.3s ease;
}

.footer-section a:hover::before {
    width: 100%;
}

.footer-bottom {
    text-align: center;
    padding-top: 25px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #bbb;
    font-size: 0.95rem;
}

/* レスポンシブデザイン */
@media (max-width: 992px) {
    .hero-content {
        flex-direction: column;
    }
    
    .concept-content {
        flex-direction: column;
    }
    
    .shadowing-content {
        flex-direction: column;
    }
    
    .shadowing-image {
        max-width: 100%;
        margin: 0 auto;
    }
    
    .step {
        flex-direction: column;
    }
    
    .step-image {
        max-width: 100%;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 20px;
    }
    
    .hero-text h2 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .learning-cycle {
        flex-direction: column;
    }
    
    .cycle-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 576px) {
    .hero-text h2 {
        font-size: 2rem;
    }
    
    .hero-text p {
        font-size: 1rem;
    }
    
    .cta-button {
        padding: 12px 24px;
        font-size: 1rem;
    }
    
    .nav-links {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
}

/* シャドーイングセクションのスタイル改善 */
.shadowing {
    padding: 100px 0;
    position: relative;
}

.shadowing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle at 70% 30%, rgba(0, 188, 212, 0.05) 0%, transparent 50%);
    z-index: -1;
}

.shadowing-content {
    display: flex;
    align-items: flex-start;
    gap: 60px;
}

.shadowing-text {
    flex: 1;
}

.shadowing-text h3 {
    font-size: 2rem;
    margin-top: 30px;
    margin-bottom: 20px;
    color: #00BCD4;
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    font-weight: 600;
    letter-spacing: 0.5px;
    padding-top: 20px;
    border-top: 1px solid #f0f0f0;
}

.shadowing-text h3:first-of-type {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
}

.shadowing-text p {
    font-size: 1.15rem;
    margin-bottom: 20px;
    line-height: 1.8;
    color: #444;
}

.shadowing-image {
    flex: 1;
    max-width: 450px;
}

.shadowing-image img {
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    transition: all 0.5s ease;
}

.shadowing-image img:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

/* 箇条書きリストの改善 */
.benefits-list {
    list-style: none;
    margin: 20px 0 30px;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.benefits-list li {
    margin-bottom: 12px;
    padding-left: 25px;
    position: relative;
    line-height: 1.6;
}

.benefits-list li:last-child {
    margin-bottom: 0;
}

.benefits-list li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: #00BCD4;
    font-weight: bold;
    font-size: 1.2rem;
}

/* 関連コンテンツリンクの改善 */
.related-content {
    margin-top: 25px;
    margin-bottom: 25px;
}

.related-link {
    display: block;
    padding: 15px;
    background-color: #f8f9fa;
    border-left: 4px solid #00BCD4;
    border-radius: 0 8px 8px 0;
    transition: all 0.3s ease;
    text-decoration: none;
}

.related-link:hover {
    background-color: #e3f2fd;
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(0, 188, 212, 0.1);
}

.related-link .related-icon {
    display: inline-block;
    margin-right: 10px;
    color: #00BCD4;
}

.related-link .related-text {
    display: inline-block;
}

.related-link h5 {
    color: #00BCD4;
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.related-link p {
    color: #666;
    margin: 0;
    font-size: 0.95rem;
}

/* 動画リンクコンテナのスタイル */
.video-link-container {
    background-color: #f8f9fa;
    border-radius: 16px;
    padding: 30px;
    margin: 30px 0 50px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.03);
    transition: all 0.4s ease;
}

.video-link-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
    border-color: rgba(0, 188, 212, 0.1);
}

.video-link-container h3 {
    color: #00BCD4;
    margin-bottom: 15px;
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    font-weight: 600;
    font-size: 1.4rem;
}

.video-link-container p {
    margin-bottom: 20px;
    color: #555;
    line-height: 1.7;
    font-size: 1.1rem;
}

.video-thumbnail-link {
    display: block;
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    margin-top: 25px;
}

.video-thumbnail-link:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.video-thumbnail-link img {
    width: 100%;
    display: block;
    transition: transform 0.5s ease;
}

.video-thumbnail-link:hover img {
    transform: scale(1.05);
}

.play-button-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background-color: rgba(0, 0, 0, 0.6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.play-button-overlay i {
    color: #fff;
    font-size: 3rem;
}

.video-thumbnail-link:hover .play-button-overlay {
    background-color: rgba(0, 188, 212, 0.8);
    transform: translate(-50%, -50%) scale(1.1);
}

.video-link-text {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background-color: rgba(0, 188, 212, 0.9);
    color: #fff;
    padding: 8px 20px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.video-thumbnail-link:hover .video-link-text {
    background-color: #FF4081;
    padding: 8px 25px;
}

/* アニメーション用