:root {
    --primary-color: #0d7c8c;
    --primary-dark: #095a66;
    --primary-light: #3da5b5;
    --secondary-color: #f39c12;
    --secondary-dark: #d68910;
    --secondary-light: #f5b041;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-gray: #ecf0f1;
    --border-color: #dce1e3;
    --success: #27ae60;
    --info: #3498db;
    --font-family: 'Noto Sans JP', sans-serif;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.15);
    --transition-base: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    color: var(--text-dark);
    line-height: 1.7;
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

ul, ol {
    list-style: none;
}

button {
    border: none;
    background: none;
    font-family: inherit;
    cursor: pointer;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.pc-only {
    display: inline;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-base);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.logo-text h1 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 2px;
}

.logo-text p {
    font-size: 0.7rem;
    color: var(--text-light);
    font-weight: 400;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-menu a {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-dark);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    white-space: nowrap;
    transition: var(--transition-base);
}

.nav-menu a i {
    font-size: 1rem;
    opacity: 0.8;
}

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

.nav-menu a:hover i {
    opacity: 1;
}

.btn-contact-nav {
    background: var(--primary-color);
    color: white !important;
    padding: 0.5rem 2rem !important;
    border-radius: var(--radius-md);
    font-weight: 600;
}

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

.btn-contact-nav i {
    opacity: 1;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
    z-index: 1001;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: var(--transition-base);
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-light));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary-color));
}

.btn-secondary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

.btn-large {
    padding: 16px 48px;
    font-size: 1.1rem;
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0d7c8c 0%, #3da5b5 50%, #5bc0ce 100%);
    padding: 120px 2rem 80px;
    margin-top: 70px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,160C1248,160,1344,128,1392,112L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    color: white;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 2rem;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 4rem;
    opacity: 0.9;
}

.hero-cta {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

section {
    padding: 4rem 0;
}

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

.section-subtitle {
    font-size: 1.3rem;
    font-weight: 500;
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.section-description {
    font-size: 1.05rem;
    text-align: center;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}

.featured-section {
    background: linear-gradient(to bottom, var(--bg-light), var(--bg-white));
}

.section-badge {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    padding: 8px 24px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.9rem;
    margin: 0 auto 2rem;
    display: block;
    width: fit-content;
    box-shadow: var(--shadow-md);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.lesson-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.lesson-feature-card {
    background: white;
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.lesson-feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
}

.lesson-feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.lesson-feature-card ul li {
    padding-left: 28px;
    margin-bottom: 1rem;
    position: relative;
    color: var(--text-light);
    line-height: 1.7;
}

.lesson-feature-card ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 12px;
    height: 6px;
    border-left: 2px solid var(--success);
    border-bottom: 2px solid var(--success);
    transform: rotate(-45deg);
}

.lesson-pricing {
    background: white;
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 3rem;
}

.lesson-pricing h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.lesson-pricing h3 i {
    color: var(--secondary-color);
}

.pricing-content {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    align-items: flex-start;
}

.pricing-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    flex: 1;
    min-width: 250px;
}

.pricing-item i {
    font-size: 2rem;
    color: var(--secondary-color);
    flex-shrink: 0;
}

.pricing-item strong {
    display: block;
    margin-bottom: 4px;
    color: var(--text-dark);
    flex: 1;
}

.price {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-left: auto;
    flex-shrink: 0;
    white-space: nowrap;
}

.pricing-features {
    flex: 2;
    min-width: 300px;
}

.pricing-features p {
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    color: var(--text-light);
    line-height: 1.6;
}

.pricing-features i {
    color: var(--success);
    font-size: 1.1rem;
    flex-shrink: 0;
    margin-top: 0.2rem;
}

.cta-center {
    text-align: center;
}

.system-consulting {
    background: var(--bg-white);
}

.system-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.system-card {
    background: white;
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--border-color);
    transition: var(--transition-base);
}

.system-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.system-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
}

.system-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.system-card ul li {
    padding-left: 28px;
    margin-bottom: 1rem;
    position: relative;
    color: var(--text-light);
    line-height: 1.7;
}

.system-card ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--info);
    font-weight: 700;
}

.system-approach {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    padding: 3rem;
    border-radius: var(--radius-lg);
    color: white;
}

.system-approach h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

.approach-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.approach-item i {
    font-size: 1.8rem;
    opacity: 0.9;
}

.approach-item p {
    font-size: 1rem;
    font-weight: 500;
}

.translation {
    background: var(--bg-light);
}

.translation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2rem;
}

.translation-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition-base);
}

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

.card-header {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-light));
    color: white;
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.card-header i {
    font-size: 2rem;
}

.card-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
}

.card-content {
    padding: 3rem;
}

.card-content h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.card-content p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.card-content ul li {
    padding-left: 28px;
    margin-bottom: 1rem;
    position: relative;
    color: var(--text-light);
    line-height: 1.7;
}

.card-content ul li::before {
    content: '•';
    position: absolute;
    left: 8px;
    color: var(--secondary-color);
    font-weight: 700;
    font-size: 1.4rem;
}

.translation-types {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.translation-type {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--secondary-color);
}

.translation-type i {
    font-size: 1.5rem;
    color: var(--secondary-color);
}

.translation-type strong {
    font-size: 1.1rem;
    color: var(--text-dark);
}

.translation-type span {
    font-size: 0.95rem;
    color: var(--text-light);
}

.topik-section {
    background: var(--bg-white);
}

.topik-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.topik-main h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.topik-main h3 i {
    color: var(--primary-color);
}

.topik-features {
    margin-bottom: 3rem;
}

.topik-features li {
    padding-left: 32px;
    margin-bottom: 1rem;
    position: relative;
    color: var(--text-light);
    line-height: 1.8;
    font-size: 1.05rem;
}

.topik-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.3rem;
}

.topik-method {
    background: linear-gradient(135deg, var(--bg-light), var(--bg-gray));
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.topik-method h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.topik-method h3 i {
    color: var(--secondary-color);
}

.method-cards {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.method-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.method-card:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.method-card i {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.method-card p {
    color: var(--text-dark);
    font-weight: 500;
}

.why-choose {
    background: var(--bg-light);
}

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

.choose-card {
    background: white;
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.choose-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.choose-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-light));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    margin: 0 auto 2rem;
    box-shadow: var(--shadow-md);
}

.choose-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.choose-card p {
    color: var(--text-light);
    line-height: 1.8;
}

.service-flow {
    background: var(--bg-white);
}

.flow-tabs {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
}

.flow-tab {
    padding: 2rem 3rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-light);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.flow-tab.active {
    color: white;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.flow-tab:hover {
    transform: translateY(-2px);
}

.flow-content {
    display: none;
}

.flow-content.active {
    display: block;
}

.flow-steps {
    max-width: 600px;
    margin: 0 auto;
}

.flow-step {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    padding: 2rem;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1rem;
    transition: var(--transition-base);
}

.flow-step:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(8px);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
}

.step-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-dark);
}

.step-content p {
    color: var(--text-light);
    font-size: 0.95rem;
}

.flow-arrow {
    text-align: center;
    color: var(--primary-color);
    font-size: 1.5rem;
    margin: 0.5rem 0;
}

.faq-section {
    background: var(--bg-light);
}

.faq-category {
    margin-bottom: 3rem;
}

.faq-category-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.faq-category-title i {
    color: var(--primary-color);
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    padding: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-dark);
    text-align: left;
    cursor: pointer;
    transition: var(--transition-base);
}

.faq-question:hover {
    color: var(--primary-color);
    background: var(--bg-light);
}

.faq-question i {
    color: var(--primary-color);
    transition: var(--transition-base);
    font-size: 0.9rem;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 2rem 2rem;
    color: var(--text-light);
    line-height: 1.8;
}

.contact-section {
    background: var(--bg-white);
}

.google-form-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.google-form-iframe {
    width: 100%;
    min-height: 1900px;
    border: none;
    display: block;
}

.footer {
    background: linear-gradient(135deg, var(--text-dark), #34495e);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-logo img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.footer-logo p {
    font-weight: 700;
    font-size: 1.2rem;
}

.footer-bottom {
    text-align: center;
    font-size: 0.9rem;
    opacity: 0.8;
}

.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 999;
}

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

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

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

.animate-on-scroll {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

@media (max-width: 1024px) {
    .topik-content {
        grid-template-columns: 1fr;
    }
    
    .translation-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-menu {
        gap: 0.3rem;
    }
    
    .nav-menu a {
        font-size: 0.85rem;
        padding: 0.5rem 0.6rem;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-description {
        font-size: 0.95rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .section-subtitle {
        font-size: 1.1rem;
    }
    
    .logo img {
        width: 40px;
        height: 40px;
    }
    
    .logo-text h1 {
        font-size: 1rem;
    }
    
    .logo-text p {
        font-size: 0.6rem;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        bottom: 0;
        height: calc(100dvh - 70px);
        height: calc(100vh - 70px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 3rem 2rem 200px 2rem;
        transition: var(--transition-base);
        box-shadow: var(--shadow-lg);
        gap: 1rem;
        overflow-y: auto;
        overflow-x: hidden;
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu a {
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 2rem;
        text-align: center;
        font-size: 1.1rem;
        gap: 0.6rem;
        min-height: 60px;
        width: 100%;
    }
    
    .nav-menu a i {
        font-size: 1.3rem;
    }
    
    .hero {
        min-height: auto;
        padding: 100px 2rem 60px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-cta .btn {
        width: 100%;
    }
    
    .pc-only {
        display: none;
    }
    
    section {
        padding: 3rem 0;
    }
    
    .lesson-features,
    .system-grid,
    .choose-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-content {
        flex-direction: column;
        align-items: stretch;
    }
    
    .pricing-item {
        min-width: 100%;
        max-width: 100%;
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .pricing-item strong {
        font-size: 1rem;
        width: 100%;
    }
    
    .price {
        margin-left: 0;
        font-size: 1.5rem;
        align-self: flex-start;
    }
    
    .pricing-features {
        min-width: 100%;
        max-width: 100%;
        width: 100%;
    }
    
    .pricing-features p {
        font-size: 0.95rem;
    }
    
    .approach-items {
        grid-template-columns: 1fr;
    }
    
    .flow-tabs {
        flex-direction: column;
    }
    
    .flow-tab {
        width: 100%;
    }
    
    .google-form-wrapper {
        border-radius: var(--radius-md);
        margin: 0 -2rem;
    }
    
    .google-form-iframe {
        min-height: 2000px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .btn-large {
        padding: 12px 24px;
        font-size: 1rem;
    }
    
    .section-badge {
        font-size: 0.8rem;
        padding: 6px 16px;
    }
    
    .lesson-pricing {
        padding: 2rem;
    }
    
    .lesson-pricing h3 {
        font-size: 1.2rem;
    }
    
    .pricing-item {
        padding: 1rem;
    }
    
    .pricing-item i {
        font-size: 1.5rem;
    }
    
    .pricing-item strong {
        font-size: 0.9rem;
    }
    
    .price {
        font-size: 1.3rem;
    }
    
    .pricing-features p {
        font-size: 0.85rem;
    }
}