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

:root {
    /* 水色ベースのカラースキーム */
    --primary-blue: #BDE1DF;
    --light-blue: #D4EEEC;
    --dark-blue: #9AC9C6;
    --accent-blue: #A8D9D6;
    --primary-teal: #7BC5C1;
    --light-teal: #A8D9D6;
    --dark-teal: #5BA8A4;
    /* 補助色 */
    --accent-coral: #FFB5A7;
    --light-coral: #FFD4C9;
    --accent-lavender: #D5C6E0;
    --light-lavender: #E8DFF5;
    --accent-peach: #FFDAB9;
    --soft-cream: #FFF9F0;
    --peachy: #FFE8DC;
    --warm-cream: #FFFEF7;
    --soft-grey: #C4B5B0;
    --text-dark: #5A4A47;
    --text-light: #F8F8F8;
    --white: #FFFFFF;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: linear-gradient(to bottom, var(--warm-cream) 0%, var(--light-blue) 50%, var(--soft-cream) 100%);
    letter-spacing: 0.02em;
    overflow-x: hidden;
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

/* ===== ヘッダー ===== */
#header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 25px rgba(189, 225, 223, 0.2);
    border-bottom: 1px solid var(--light-blue);
    transition: all 0.4s ease;
}

#header.scrolled {
    box-shadow: 0 4px 35px rgba(189, 225, 223, 0.35);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.logo-image {
    height: 40px;
    width: auto;
    display: block;
}

.logo h1 {
    font-family: 'Noto Serif JP', serif;
    font-size: 1.4rem;
    font-weight: 600;
    color: #7AB8B3;
    letter-spacing: 0.1em;
    transition: all 0.3s ease;
}

.logo h1:hover {
    transform: scale(1.03);
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
    padding: 0.5rem 0;
    transition: all 0.3s ease;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-blue));
    transition: width 0.3s ease;
}

.nav a:hover {
    color: var(--dark-blue);
}

.nav a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.3s ease;
}

.mobile-menu-btn:hover {
    color: var(--primary-blue);
    transform: scale(1.1);
}

/* ===== ヒーローセクション ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-slideshow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-slideshow .slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 2s ease-in-out;
    animation: kenBurns 20s infinite;
}

.hero-slideshow .slide.active {
    opacity: 1;
}

@keyframes kenBurns {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(189, 225, 223, 0.8) 0%, 
        rgba(168, 217, 214, 0.7) 50%, 
        rgba(123, 197, 193, 0.6) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 900px;
    padding: 2rem;
    opacity: 0;
    animation: fadeInUp 1s forwards 0.3s;
}

.hero-title-wrapper {
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.4;
    letter-spacing: 0.08em;
    position: relative;
}

.hero-title .title-line {
    display: block;
    color: #FFFFFF;
    padding: 0.3rem 0;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    animation: gentleFadeFloat 3s ease-in-out infinite;
}

@keyframes gentleFadeFloat {
    0%, 100% {
        opacity: 0.95;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
        transform: translateY(-3px);
    }
}

.hero-title-animated .title-line {
    /* アニメーション無効化 */
}

@keyframes titleShine {
    0%, 100% {
        background: linear-gradient(135deg, #B8E6E1 0%, #D4A5D9 50%, #FFB5C5 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        filter: drop-shadow(0 0 20px rgba(184, 230, 225, 0.4));
    }
    50% {
        background: linear-gradient(135deg, #C5F0EC 0%, #E5C0EA 30%, #D4A5D9 50%, #FFB5C5 70%, #FFC9D6 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        filter: drop-shadow(0 0 30px rgba(212, 165, 217, 0.6)) drop-shadow(0 0 40px rgba(255, 181, 197, 0.5));
    }
}

.title-decoration {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.decoration-line {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, #D4A5D9, transparent);
    animation: lineGlow 3s ease-in-out infinite;
}

.decoration-dot {
    width: 10px;
    height: 10px;
    background: #FFB5C5;
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(255, 181, 197, 0.8);
    animation: dotPulse 2s ease-in-out infinite;
}

@keyframes lineGlow {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
        box-shadow: 0 0 10px rgba(212, 165, 217, 0.8);
    }
}

@keyframes dotPulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 20px rgba(255, 181, 197, 0.8);
    }
    50% {
        transform: scale(1.3);
        box-shadow: 0 0 30px rgba(255, 181, 197, 1), 0 0 40px rgba(212, 165, 217, 0.8);
    }
}

.hero-subtitle {
    font-size: 1.15rem;
    margin-bottom: 2.5rem;
    line-height: 1.8;
    text-shadow: 1px 2px 8px rgba(0, 0, 0, 0.3);
    font-weight: 400;
}

.hero-subtitle p {
    margin-bottom: 0.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-lavender));
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(189, 225, 223, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-dark);
}

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 1);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== セクション共通スタイル ===== */
section {
    padding: 5rem 0;
    position: relative;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
    letter-spacing: 0.05em;
}

.section-underline {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-coral));
    margin: 0 auto 3rem;
    border-radius: 2px;
}

/* ===== Aboutセクション ===== */
.about {
    background: linear-gradient(to bottom, var(--soft-cream), var(--light-lavender));
}

.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.9;
}

.about-text p {
    margin-bottom: 1.2rem;
}

.about-lead {
    font-size: 1.3rem;
    font-weight: 400;
    color: var(--text-dark);
    margin-bottom: 1.5rem !important;
}

.noren-link {
    color: var(--dark-blue);
    text-decoration: underline;
    font-weight: 600;
}

.noren-link:hover {
    color: var(--primary-blue);
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(189, 225, 223, 0.15);
    transition: all 0.3s ease;
    border: 2px solid var(--light-blue);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(189, 225, 223, 0.25);
}

.feature-icon {
    font-size: 3rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) translateY(-5px);
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-card p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-dark);
}

/* ===== カリキュラムセクション ===== */
.curriculum {
    background: linear-gradient(to bottom, var(--light-lavender), var(--light-blue));
}

.curriculum-steps {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.curriculum-step {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 6px 25px rgba(189, 225, 223, 0.2);
    border: 2px solid var(--light-blue);
    transition: all 0.3s ease;
}

.curriculum-step:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 35px rgba(189, 225, 223, 0.3);
}

.step-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.step-number {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--white);
    background: linear-gradient(135deg, var(--primary-blue), var(--dark-blue));
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    min-width: 120px;
    text-align: center;
}

.step-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.4;
}

.step-subtitle {
    font-size: 1.2rem;
    color: var(--dark-blue);
    font-weight: 400;
}

.step-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 2rem;
    padding-left: 1rem;
    border-left: 4px solid var(--primary-blue);
}

.step-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.curriculum-item {
    background: linear-gradient(135deg, var(--light-blue), var(--white));
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 3px 15px rgba(189, 225, 223, 0.15);
    transition: all 0.3s ease;
    border: 1px solid var(--light-blue);
    position: relative;
    overflow: hidden;
}

.curriculum-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(189, 225, 223, 0.3), transparent);
    transition: left 0.5s ease;
}

.curriculum-item:hover::before {
    left: 100%;
}

.curriculum-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(189, 225, 223, 0.25);
}

.curriculum-number {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.curriculum-icon {
    font-size: 2rem;
    color: var(--primary-teal);
    margin-bottom: 0.8rem;
    transition: all 0.3s ease;
}

.curriculum-item:hover .curriculum-icon {
    transform: scale(1.1) translateY(-5px);
}

.curriculum-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.curriculum-item p {
    font-size: 0.95rem;
    color: var(--text-dark);
    opacity: 0.85;
}

.curriculum-item.etc-item {
    border: 2px dashed var(--primary-blue);
    background: linear-gradient(135deg, var(--light-blue), var(--soft-cream));
}

/* ===== カラーマネジメント比較セクション ===== */
.color-comparison {
    background: linear-gradient(to bottom, var(--light-blue), var(--soft-cream));
}

.comparison-intro {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.video-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.comparison-video {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(189, 225, 223, 0.15);
    border: 2px solid var(--light-blue);
}

.comparison-video h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    text-align: center;
}

.before-after-label {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-left: 0.5rem;
    letter-spacing: 0.05em;
}

.before-after-label.before {
    background: linear-gradient(135deg, #FFB5A7, #FFA07A);
    color: white;
}

.before-after-label.after {
    background: linear-gradient(135deg, var(--primary-blue), var(--dark-blue));
    color: white;
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 10px;
}

.video-wrapper a {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
}

.video-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: rgba(189, 225, 223, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
    transition: all 0.3s ease;
}

.video-wrapper a:hover .play-button {
    background: var(--primary-blue);
    transform: translate(-50%, -50%) scale(1.1);
}

/* ===== プランセクション ===== */
.plans {
    background: linear-gradient(to bottom, var(--soft-cream), var(--light-blue));
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.plan-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(189, 225, 223, 0.15);
    border: 2px solid var(--light-blue);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.plan-card:hover {
    box-shadow: 0 8px 30px rgba(189, 225, 223, 0.25);
}

.plan-card.recommended {
    border: 3px solid var(--primary-blue);
    background: linear-gradient(135deg, var(--white) 0%, var(--light-blue) 100%);
}

.plan-card.recommended:hover {
    box-shadow: 0 10px 40px rgba(189, 225, 223, 0.35);
}

.plan-badge {
    position: absolute;
    top: 20px;
    right: -35px;
    background: linear-gradient(135deg, var(--primary-blue), var(--dark-blue));
    color: var(--white);
    padding: 0.5rem 3rem;
    font-weight: 700;
    font-size: 0.9rem;
    transform: rotate(45deg);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

.plan-header {
    text-align: center;
    margin-bottom: 2rem;
}

.plan-name {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.plan-period {
    font-size: 0.9rem;
    color: var(--dark-blue);
    font-weight: 500;
    line-height: 1.5;
    margin-top: 0.5rem;
}

.plan-card.recommended .plan-name {
    color: var(--dark-blue);
}

.plan-features {
    list-style: none;
    margin-bottom: 2rem;
}

.plan-features li {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--light-blue);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    transition: all 0.3s ease;
}

.plan-features li:hover {
    padding-left: 0.5rem;
}

.plan-features li i {
    font-size: 1.1rem;
    min-width: 20px;
}

.plan-features li .fa-check {
    color: var(--primary-blue);
}

.plan-features li .fa-times {
    color: var(--soft-grey);
}

.plan-features .feature-excluded {
    opacity: 0.4;
    color: var(--soft-grey);
}

.btn-plan {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    color: var(--white);
}

.btn-plan:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(189, 225, 223, 0.35);
}

.plan-card.recommended .btn-plan {
    background: linear-gradient(135deg, var(--dark-blue), var(--primary-blue));
}

/* ===== 受講生の声セクション ===== */
.testimonials {
    background: linear-gradient(to bottom, var(--light-blue), var(--light-coral));
}

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

.testimonial-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(189, 225, 223, 0.15);
    border: 2px solid var(--light-blue);
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(189, 225, 223, 0.25);
}

.testimonial-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.testimonial-subtitle {
    font-size: 0.9rem;
    color: var(--dark-blue);
    margin-bottom: 1rem;
    font-weight: 500;
}

.testimonial-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

.testimonial-author {
    border-top: 2px solid var(--light-blue);
    padding-top: 1rem;
}

.author-name {
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: 0.3rem;
}

.author-role {
    font-size: 0.9rem;
    color: var(--text-dark);
    opacity: 0.7;
}

/* ===== お問い合わせセクション ===== */
.contact {
    background: linear-gradient(to bottom, var(--light-coral), var(--light-blue));
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-method-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(189, 225, 223, 0.15);
    border: 2px solid var(--light-blue);
    text-align: center;
    transition: all 0.3s ease;
}

.contact-method-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(189, 225, 223, 0.25);
}

.method-icon {
    font-size: 4rem;
    color: var(--accent-coral);
    margin-bottom: 1.5rem;
}

.contact-method-card h3 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.contact-method-card > p {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.method-benefits {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.method-benefits li {
    padding: 0.5rem 0;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.method-benefits li i {
    color: var(--primary-blue);
    font-size: 1rem;
}

.contact-note {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    border: 2px solid var(--light-blue);
    text-align: center;
}

.contact-note p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-dark);
}

.contact-note i {
    color: var(--primary-blue);
    margin-right: 0.5rem;
}

/* ===== フッター ===== */
.footer {
    background: linear-gradient(135deg, var(--dark-blue), var(--primary-blue));
    color: var(--white);
    padding: 3rem 0 1.5rem;
}

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

.footer-logo-image {
    height: 60px;
    width: auto;
    display: block;
    margin-bottom: 1rem;
}

.footer-logo h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    font-family: 'Noto Serif JP', serif;
}

.footer-logo p {
    font-size: 0.95rem;
    line-height: 1.6;
    opacity: 0.9;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

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

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

.footer-links a,
.footer-contact a {
    color: var(--white);
    opacity: 0.9;
    transition: all 0.3s ease;
}

.footer-links a:hover,
.footer-contact a:hover {
    opacity: 1;
    transform: translateX(5px);
}

.footer-contact p {
    margin-bottom: 0.5rem;
}

.footer-contact i {
    margin-right: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.9rem;
    opacity: 0.8;
}

/* ===== レスポンシブデザイン ===== */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }

    .container {
        padding: 0 15px;
    }

    .nav {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(15px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 1.5rem;
        transition: left 0.4s ease;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    }

    .nav.active {
        left: 0;
    }

    .mobile-menu-btn {
        display: block;
    }

    .header-content {
        padding: 0.7rem 0;
    }

    .logo-image {
        height: 30px;
    }

    .logo h1 {
        font-size: 1.1rem;
    }

    .hero {
        min-height: 85vh;
        padding-top: 60px;
    }

    .hero-content {
        padding: 1rem;
    }

    .hero-title {
        font-size: 1.8rem;
        margin-bottom: 1rem;
    }
    
    .hero-title .title-line {
        font-size: 1.8rem;
        padding: 0.2rem 0;
    }
    
    .title-decoration {
        gap: 0.7rem;
        margin-bottom: 1.2rem;
    }
    
    .decoration-line {
        width: 35px;
    }
    
    .decoration-dot {
        width: 8px;
        height: 8px;
    }

    .hero-subtitle {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
        line-height: 1.6;
    }

    .hero-subtitle p {
        margin-bottom: 0.4rem;
    }

    .hero-buttons {
        flex-direction: row;
        gap: 0.8rem;
    }

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.85rem;
    }

    section {
        padding: 2.5rem 0;
    }

    .section-title {
        font-size: 1.6rem;
        margin-bottom: 0.7rem;
    }

    .section-underline {
        margin: 0 auto 2rem;
        width: 60px;
        height: 3px;
    }

    .about-content {
        gap: 2rem;
    }

    .about-text {
        font-size: 0.95rem;
    }

    .about-text p {
        margin-bottom: 0.8rem;
    }

    .about-lead {
        font-size: 1.1rem;
        margin-bottom: 1rem !important;
    }

    .about-features {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }

    .feature-card {
        padding: 1.3rem;
    }

    .feature-icon {
        font-size: 2.2rem;
        margin-bottom: 0.7rem;
    }

    .feature-card h3 {
        font-size: 1.1rem;
        margin-bottom: 0.7rem;
    }

    .feature-card p {
        font-size: 0.9rem;
    }

    .curriculum-steps {
        gap: 2rem;
    }

    .curriculum-step {
        padding: 1.5rem;
    }

    .step-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.8rem;
        margin-bottom: 1rem;
    }

    .step-number {
        font-size: 1.3rem;
        padding: 0.4rem 1rem;
        min-width: 100px;
    }

    .step-title {
        font-size: 1.2rem;
    }

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

    .step-description {
        font-size: 0.95rem;
        margin-bottom: 1.2rem;
        padding-left: 0.7rem;
        border-left-width: 3px;
    }

    .step-items {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .curriculum-item {
        padding: 1.2rem;
    }

    .curriculum-number {
        font-size: 1rem;
    }

    .curriculum-icon {
        font-size: 1.6rem;
        margin-bottom: 0.6rem;
    }

    .curriculum-item h4 {
        font-size: 1rem;
        margin-bottom: 0.4rem;
    }

    .curriculum-item p {
        font-size: 0.85rem;
    }

    .comparison-intro {
        font-size: 1rem;
        margin-bottom: 2rem;
    }

    .video-comparison {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .comparison-video {
        padding: 1rem;
    }

    .comparison-video h3 {
        font-size: 1.1rem;
        margin-bottom: 0.7rem;
    }

    .plans-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .plan-card {
        padding: 1.5rem;
    }

    .plan-name {
        font-size: 1.5rem;
    }

    .plan-features li {
        padding: 0.6rem 0;
        font-size: 0.85rem;
    }

    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .testimonial-card {
        padding: 1.5rem;
    }

    .testimonial-title {
        font-size: 1.05rem;
        margin-bottom: 0.4rem;
    }

    .testimonial-subtitle {
        font-size: 0.85rem;
        margin-bottom: 0.8rem;
    }

    .testimonial-text {
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }

    .contact-methods {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-bottom: 2rem;
    }

    .contact-method-card {
        padding: 1.5rem;
    }

    .method-icon {
        font-size: 3rem;
        margin-bottom: 1rem;
    }

    .contact-method-card h3 {
        font-size: 1.3rem;
        margin-bottom: 0.7rem;
    }

    .contact-method-card > p {
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }

    .method-benefits {
        margin-bottom: 1.5rem;
    }

    .method-benefits li {
        padding: 0.4rem 0;
        font-size: 0.85rem;
    }

    .contact-note {
        padding: 1.3rem;
    }

    .contact-note p {
        font-size: 0.9rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 1.5rem;
    }

    .footer-logo-image {
        height: 50px;
        margin-left: auto;
        margin-right: auto;
    }

    .footer-logo h3 {
        font-size: 1.2rem;
    }

    .footer-logo p,
    .footer-links a,
    .footer-contact a {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 13px;
    }

    .container {
        padding: 0 12px;
    }

    .logo-image {
        height: 25px;
    }

    .logo h1 {
        font-size: 1rem;
    }

    .hero {
        min-height: 80vh;
    }

    .hero-content {
        padding: 0.8rem;
    }

    .hero-title {
        font-size: 1.5rem;
        margin-bottom: 0.8rem;
    }
    
    .hero-title .title-line {
        font-size: 1.5rem;
        padding: 0.15rem 0;
    }
    
    .title-decoration {
        gap: 0.5rem;
        margin-bottom: 1rem;
    }
    
    .decoration-line {
        width: 30px;
    }
    
    .decoration-dot {
        width: 7px;
        height: 7px;
    }

    .hero-subtitle {
        font-size: 0.85rem;
        margin-bottom: 1.2rem;
        line-height: 1.5;
    }

    .hero-subtitle p {
        margin-bottom: 0.3rem;
    }

    .hero-buttons {
        gap: 0.6rem;
    }

    .btn {
        padding: 0.7rem 1.2rem;
        font-size: 0.8rem;
    }

    section {
        padding: 2rem 0;
    }

    .section-title {
        font-size: 1.4rem;
        margin-bottom: 0.6rem;
    }

    .section-underline {
        width: 50px;
        height: 2.5px;
        margin: 0 auto 1.5rem;
    }

    .about-text {
        font-size: 0.9rem;
    }

    .about-lead {
        font-size: 1rem;
    }

    .feature-card,
    .curriculum-step,
    .plan-card,
    .testimonial-card,
    .contact-method-card {
        padding: 1.2rem;
    }

    .feature-icon {
        font-size: 2rem;
    }

    .feature-card h3 {
        font-size: 1rem;
    }

    .step-number {
        font-size: 1.1rem;
        padding: 0.3rem 0.8rem;
    }

    .step-title {
        font-size: 1.1rem;
    }

    .step-subtitle {
        font-size: 0.95rem;
    }

    .step-description {
        font-size: 0.9rem;
    }

    .curriculum-item {
        padding: 1rem;
    }

    .curriculum-icon {
        font-size: 1.5rem;
    }

    .comparison-video {
        padding: 0.8rem;
    }

    .plan-name {
        font-size: 1.3rem;
    }

    .testimonial-title {
        font-size: 1rem;
    }

    .method-icon {
        font-size: 2.5rem;
    }

    .contact-method-card h3 {
        font-size: 1.2rem;
    }
}

/* ===== スクロールアニメーション ===== */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ===== その他のアニメーション ===== */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.floating {
    animation: float 3s ease-in-out infinite;
}