/* ========================================
   BLACK ROOM - Complete Responsive Styles
   ======================================== */

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --black-primary: #000000;
    --black-secondary: #0a0a0a;
    --black-light: #1a1a1a;
    --white-primary: #ffffff;
    --white-secondary: #f5f5f5;
    --white-dim: #cccccc;
    --gray-light: #888888;
    --gray-dark: #333333;
    --accent: #888888;
    
    /* Typography */
    --font-primary: 'Zen Kaku Gothic New', 'Noto Sans JP', sans-serif;
    --font-secondary: 'Noto Sans JP', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
    
    /* Animation */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--black-primary);
    color: var(--white-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    cursor: none;
}

/* ========================================
   Custom Cursor
   ======================================== */
.custom-cursor {
    width: 20px;
    height: 20px;
    border: 2px solid var(--white-primary);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    transition: transform 0.1s ease;
    mix-blend-mode: difference;
}

.cursor-follower {
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9998;
    transition: transform 0.3s ease;
}

/* Hide custom cursor on mobile */
@media (max-width: 1024px) {
    .custom-cursor,
    .cursor-follower {
        display: none;
    }
    
    body {
        cursor: auto;
    }
}

/* ========================================
   Loading Screen
   ======================================== */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: linear-gradient(135deg, var(--black-primary) 0%, var(--black-light) 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

#loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-container {
    text-align: center;
}

.logo-loader svg {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.logo-loader .circle-outer {
    animation: rotate 3s linear infinite;
    transform-origin: center;
}

.logo-loader .circle-middle {
    animation: rotate-reverse 2s linear infinite;
    transform-origin: center;
}

.logo-loader .circle-inner {
    animation: rotate 1.5s linear infinite;
    transform-origin: center;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes rotate-reverse {
    from { transform: rotate(360deg); }
    to { transform: rotate(0deg); }
}

.loading-text {
    font-size: 0.875rem;
    letter-spacing: 0.3em;
    color: var(--white-dim);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    animation: fadeInOut 2s infinite;
}

@keyframes fadeInOut {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.loading-bar {
    width: 200px;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
    border-radius: 2px;
    margin: 0 auto;
}

.loading-progress {
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--white-primary), transparent);
    animation: loading 2s ease-in-out infinite;
}

@keyframes loading {
    0% { transform: translateX(-200px); }
    100% { transform: translateX(200px); }
}

/* ========================================
   Navigation
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: linear-gradient(180deg, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0) 100%);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
}

.nav {
    padding: 1.5rem 0;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--white-primary);
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    color: var(--white-dim);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--white-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--white-primary);
    transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.join-btn {
    background: var(--white-primary);
    color: var(--black-primary);
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
}

.join-btn:hover {
    background: var(--white-dim);
    transform: translateY(-2px);
}

.join-btn::after {
    display: none;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    width: 100%;
    height: 2px;
    background: var(--white-primary);
    transition: all var(--transition-normal);
    transform-origin: center;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#heroCanvas {
    width: 100%;
    height: 100%;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 0%, rgba(0,0,0,0.4) 100%);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 2rem;
    letter-spacing: 0.02em;
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 300;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--white-dim);
    opacity: 0;
    transform: translateY(20px);
}

.hero-tagline {
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    font-weight: 500;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(20px);
}

.hero-actions {
    opacity: 0;
    transform: translateY(20px);
}

.scroll-btn {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--white-primary);
    text-decoration: none;
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    transition: transform var(--transition-normal);
}

.scroll-btn:hover {
    transform: translateY(5px);
}

.scroll-btn svg {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(10px); }
}

/* Fade In Animations */
.fade-in-up {
    animation: fadeInUp 1s ease forwards;
}

.fade-in-up.delay-1 {
    animation-delay: 0.2s;
}

.fade-in-up.delay-2 {
    animation-delay: 0.4s;
}

.fade-in-up.delay-3 {
    animation-delay: 0.6s;
}

.fade-in-up.delay-4 {
    animation-delay: 0.8s;
}

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

.fade-in {
    opacity: 0;
    animation: fadeIn 1s ease forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

.fade-in-right {
    opacity: 0;
    transform: translateX(-50px);
    animation: fadeInRight 1s ease forwards;
}

@keyframes fadeInRight {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in-left {
    opacity: 0;
    transform: translateX(50px);
    animation: fadeInLeft 1s ease forwards;
}

@keyframes fadeInLeft {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ========================================
   Sections
   ======================================== */
.section {
    padding: var(--spacing-xxl) 0;
}

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 900;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
    position: relative;
    display: inline-block;
}

.section-title[data-text]::before {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    color: transparent;
    -webkit-text-stroke: 1px rgba(255, 255, 255, 0.1);
    z-index: -1;
    transform: translate(3px, 3px);
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--white-dim);
    font-weight: 300;
}

/* ========================================
   Concept Section
   ======================================== */
.concept {
    background: linear-gradient(180deg, var(--black-primary) 0%, var(--black-light) 100%);
}

.concept-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: var(--spacing-xl);
}

.concept-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 3rem 2rem;
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.concept-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top left, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.concept-card:hover {
    transform: translateY(-10px);
    border-color: rgba(255, 255, 255, 0.3);
}

.concept-card:hover::before {
    opacity: 1;
}

.concept-number {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-size: 3rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.05);
}

.concept-icon {
    margin-bottom: 2rem;
    color: var(--accent);
}

.concept-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.concept-text {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--white-dim);
}

/* ========================================
   Main Visual Section
   ======================================== */
.main-visual {
    background: var(--black-primary);
    overflow: hidden;
}

.visual-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.visual-image {
    position: relative;
    overflow: hidden;
    border-radius: 20px;
}

.visual-image img {
    width: 100%;
    height: auto;
    display: block;
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0,0,0,0.3) 0%, transparent 100%);
    pointer-events: none;
}

.visual-text {
    padding: 2rem;
}

.visual-title {
    font-size: clamp(2rem, 3vw, 2.5rem);
    font-weight: 900;
    margin-bottom: 2rem;
}

.visual-description {
    font-size: 1.1rem;
    line-height: 2;
    color: var(--white-dim);
}

/* ========================================
   Features Section
   ======================================== */
.features {
    background: linear-gradient(180deg, var(--black-light) 0%, var(--black-primary) 100%);
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 5rem;
}

.feature-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.feature-item.reverse {
    direction: rtl;
}

.feature-item.reverse .feature-content {
    direction: ltr;
}

.feature-image {
    position: relative;
    overflow: hidden;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.feature-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-slow);
}

.feature-item:hover .feature-image img {
    transform: scale(1.05);
}

.feature-content {
    position: relative;
}

.feature-number {
    font-size: 4rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.05);
    position: absolute;
    top: -2rem;
    left: 0;
}

.feature-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.feature-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--white-dim);
}

/* ========================================
   Voice Section
   ======================================== */
.voice {
    background: var(--black-primary);
}

.voice-slider {
    overflow: hidden;
}

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

.voice-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 2.5rem;
    position: relative;
    transition: all var(--transition-normal);
}

.voice-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.2);
}

.voice-quote {
    font-size: 4rem;
    color: var(--accent);
    opacity: 0.2;
    line-height: 1;
    margin-bottom: 1rem;
}

.voice-text {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    font-style: italic;
}

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

.author-avatar {
    flex-shrink: 0;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.voice-name {
    font-weight: 600;
    font-size: 1rem;
}

.voice-detail {
    font-size: 0.875rem;
    color: var(--white-dim);
}

/* ========================================
   Price Section
   ======================================== */
.price {
    background: linear-gradient(180deg, var(--black-primary) 0%, var(--black-light) 100%);
}

.price-wrapper {
    display: flex;
    justify-content: center;
}

.price-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    padding: 3rem;
    max-width: 500px;
    width: 100%;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.price-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 60px rgba(255, 255, 255, 0.1);
}

.price-ribbon {
    position: absolute;
    top: 2rem;
    right: -3rem;
    background: var(--accent);
    color: var(--black-primary);
    padding: 0.5rem 4rem;
    transform: rotate(45deg);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.price-header {
    text-align: center;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.price-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.price-amount {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin: 1rem 0;
}

.price-currency {
    font-size: 1.5rem;
    margin-right: 0.5rem;
}

.price-number {
    font-size: 4rem;
    font-weight: 900;
}

.price-period {
    font-size: 1.25rem;
    margin-left: 0.5rem;
    color: var(--white-dim);
}

.price-tax {
    color: var(--white-dim);
    font-size: 0.875rem;
}

.price-description {
    padding: 2rem 0;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.price-description p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.price-features {
    list-style: none;
    padding: 2rem 0;
}

.price-features li {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.price-features li:last-child {
    border-bottom: none;
}

.price-features svg {
    flex-shrink: 0;
    color: var(--accent);
}

.price-btn {
    display: block;
    width: 100%;
    background: var(--white-primary);
    color: var(--black-primary);
    text-align: center;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    text-decoration: none;
    transition: all var(--transition-normal);
    margin-top: 2rem;
}

.price-btn:hover {
    background: var(--white-dim);
    transform: scale(1.05);
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    background: radial-gradient(circle at center, var(--black-light) 0%, var(--black-primary) 100%);
    text-align: center;
    padding: var(--spacing-xxl) 0;
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 900;
    margin-bottom: 2rem;
}

.cta-text {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--white-dim);
    margin-bottom: 3rem;
}

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

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
    font-size: 1rem;
}

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

.cta-btn.primary:hover {
    background: var(--white-dim);
    transform: translateY(-3px);
}

.cta-btn.line-btn {
    background: #00B900;
    color: var(--white-primary);
    border: none;
}

.cta-btn.line-btn:hover {
    background: #00A000;
    transform: translateY(-3px);
}

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

.cta-btn.secondary:hover {
    background: var(--white-primary);
    color: var(--black-primary);
    transform: translateY(-3px);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--black-secondary);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-tagline {
    color: var(--white-dim);
    font-size: 0.875rem;
    letter-spacing: 0.05em;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-column {
    display: flex;
    flex-direction: column;
}

.footer-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
}

.footer-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-list li {
    font-size: 0.875rem;
    color: var(--white-dim);
}

.footer-list a {
    color: var(--white-dim);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright {
    font-size: 0.875rem;
    color: var(--white-dim);
}

/* ========================================
   Responsive Design - Complete 8 Breakpoints
   ======================================== */

/* ========================================
   Ultra Small: ~320px
   スマートフォン（標準）
   ======================================== */
@media (max-width: 320px) {
    /* CTA Section - 320px以下で適切なサイズ */
    .cta-title {
        font-size: 1.47rem !important;
        padding: 0 0.5rem;
        letter-spacing: normal;
    }
    
    .cta-text {
        font-size: 1.07rem !important;
        padding: 0 0.5rem;
        letter-spacing: normal;
        line-height: 1.5;
    }
    
    :root {
        --spacing-xs: 0.25rem;
        --spacing-sm: 0.5rem;
        --spacing-md: 1rem;
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-xxl: 3rem;
    }

    .nav-container {
        padding: 0 1rem;
    }

    .container {
        padding: 0 1rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 0.875rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .concept-grid,
    .voice-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .concept-card {
        padding: 1.5rem;
    }

    .price-card {
        padding: 1.5rem;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    /* ナビゲーション修正 */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        transition: right var(--transition-normal);
        padding: 2rem;
        z-index: 999;
    }

    .nav-menu.active {
        right: 0;
    }

    .hamburger {
        display: flex;
    }

    /* 画像の非表示 */
    .visual-image,
    .feature-image {
        display: none;
    }

    /* コンテンツの全幅表示 */
    .visual-content,
    .feature-item,
    .feature-item.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }

    .feature-content {
        padding: 1.5rem;
        text-align: center;
    }

    .visual-text {
        text-align: center;
        padding: 1.5rem;
    }
    
    /* Hero Section 調整 */
    .hero {
        min-height: 80vh;
        padding: 2rem 1rem;
    }
    
    .hero-content {
        padding: 1rem;
    }
    
    .title-line {
        display: block;
        margin-bottom: 0.5rem;
    }
    
    /* Concept Cards 調整 */
    .concept-card {
        overflow: hidden;
        word-wrap: break-word;
    }
    
    .concept-title {
        font-size: 1.125rem;
    }
    
    .concept-text {
        font-size: 0.875rem;
        line-height: 1.6;
    }
    
    /* Voice Section 調整 */
    .voice-card {
        padding: 1.5rem;
    }
    
    .voice-title {
        font-size: 1rem;
    }
    
    .voice-text {
        font-size: 0.875rem;
    }
    
    /* Price Card 調整 */
    .price-amount {
        font-size: 2rem;
    }
    
    .price-period {
        font-size: 0.875rem;
    }
    
    /* Footer 調整 */
    .footer-links {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-column {
        margin-bottom: 1.5rem;
    }
    
    .footer-title {
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }
    
    .footer-list {
        font-size: 0.875rem;
    }
    
    /* CTA Section - テキスト改行防止 */
    .cta-title {
        white-space: nowrap !important;
        overflow: visible !important;
        font-size: 1.73rem !important; /* 2/3サイズ */
        line-height: 1.3;
        letter-spacing: normal;
        transform: none; /* 変形を削除 */
    }
    
    .cta-text {
        font-size: 1.2rem !important; /* 2/3サイズ */
        line-height: 1.5;
        white-space: normal;
        letter-spacing: normal;
    }
    
    .cta-text br {
        display: none !important; /* brタグを完全に無効化 */
    }
    
    /* CTAセクション全体の調整 */
    .cta {
        padding: 2rem 0.5rem !important;
    }
    
    .cta-content {
        padding: 0 !important;
        max-width: 100% !important;
    }
}

/* Small Mobile: 321px - 480px */
@media (min-width: 321px) and (max-width: 480px) {
    /* CTA Section - 480px以下で適切なサイズ */
    .cta-title {
        font-size: 1.6rem !important;
        white-space: nowrap !important;
        letter-spacing: normal;
    }
    
    .cta-text {
        font-size: 1.13rem !important;
        letter-spacing: normal;
        line-height: 1.5;
    }
    
    .container {
        padding: 0 1.25rem;
    }

    .hero-title {
        font-size: 2rem;
    }

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

    .section-title {
        font-size: 1.75rem;
    }

    .concept-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .voice-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    /* ナビゲーション修正 */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        transition: right var(--transition-normal);
        padding: 2rem;
        z-index: 999;
    }

    .nav-menu.active {
        right: 0;
    }

    .hamburger {
        display: flex;
    }

    /* 画像サイズ調整 */
    .visual-image img,
    .feature-image img {
        height: 200px;
        object-fit: cover;
    }

    /* レイアウト修正 */
    .visual-content,
    .feature-item,
    .feature-item.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
        gap: 1.5rem;
    }

    .feature-content {
        padding: 1.5rem;
        text-align: center;
    }
}

/* Tablet Portrait: 481px - 767px */
@media (min-width: 481px) and (max-width: 767px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        transition: right var(--transition-normal);
        padding: 2rem;
    }

    .nav-menu.active {
        right: 0;
    }

    .hamburger {
        display: flex;
    }

    /* ヒーローセクション */
    .hero-title {
        font-size: 2.25rem;
        line-height: 1.4;
    }

    .hero-subtitle {
        font-size: 1rem;
        line-height: 1.7;
    }

    .hero-tagline {
        font-size: 0.875rem;
    }

    /* セクションタイトル */
    .section-title {
        font-size: 1.875rem;
    }

    .section-subtitle {
        font-size: 1.125rem;
    }

    /* コンセプト */
    .concept-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .concept-card {
        padding: 2rem;
    }

    .concept-title {
        font-size: 1.25rem;
    }

    .concept-text {
        font-size: 0.9375rem;
    }

    /* ビジュアル */
    .visual-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .visual-title {
        font-size: 1.75rem;
    }

    .visual-description {
        font-size: 1rem;
    }

    /* 機能 */
    .feature-item,
    .feature-item.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }

    .feature-title {
        font-size: 1.5rem;
    }

    .feature-description {
        font-size: 1rem;
    }

    /* ボイス */
    .voice-grid {
        grid-template-columns: 1fr;
    }

    /* CTA Section - 481px-767px */
    .cta-title {
        font-size: 1.73rem !important;
        white-space: nowrap !important;
    }
    
    .cta-text {
        font-size: 1.2rem !important;
    }

    .voice-text {
        font-size: 1rem;
    }

    /* 価格 */
    .price-number {
        font-size: 3.5rem;
    }

    .price-description p {
        font-size: 0.9375rem;
    }

    /* CTA */
    .cta-title {
        font-size: 2rem;
    }

    .cta-text {
        font-size: 1rem;
    }

    .cta-btn {
        font-size: 1rem;
        padding: 1rem 2rem;
    }

    /* フッター */
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer-list {
        font-size: 0.875rem;
    }
}

/* Tablet Standard: 768px - 1024px */
@media (min-width: 768px) and (max-width: 1024px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 60%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        transition: right var(--transition-normal);
        padding: 2rem;
    }

    .nav-menu.active {
        right: 0;
    }

    .hamburger {
        display: flex;
    }

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

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

    .feature-item,
    .feature-item.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }

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

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

/* Small Desktop: 1025px - 1279px */
@media (min-width: 1025px) and (max-width: 1279px) {
    .container {
        max-width: 1000px;
    }

    .concept-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

/* Standard Desktop: 1280px - 1440px */
@media (min-width: 1280px) and (max-width: 1440px) {
    .container {
        max-width: 1200px;
    }

    .nav-container {
        max-width: 1300px;
    }
}

/* Wide Desktop: 1441px - 1919px */
@media (min-width: 1441px) and (max-width: 1919px) {
    .container {
        max-width: 1400px;
    }

    .nav-container {
        max-width: 1500px;
    }

    .hero-title {
        font-size: 5rem;
    }

    .section-title {
        font-size: 3.5rem;
    }
}

/* Ultra Wide: 1920px+ */
@media (min-width: 1920px) {
    .container {
        max-width: 1600px;
    }

    .nav-container {
        max-width: 1700px;
    }

    .hero-title {
        font-size: 5.5rem;
    }

    .section-title {
        font-size: 4rem;
    }

    .hero-subtitle {
        font-size: 1.5rem;
    }

    .concept-card {
        padding: 4rem 3rem;
    }

    .price-card {
        padding: 4rem;
        max-width: 600px;
    }
}

/* Mobile Menu Styles for all mobile/tablet breakpoints */
@media (max-width: 1024px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 400px;
        height: 100vh;
        background: rgba(0, 0, 0, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        transition: right var(--transition-normal);
        padding: 2rem;
        z-index: 999;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-link {
        font-size: 1.25rem;
        text-align: center;
    }

    .hamburger {
        display: flex;
    }

    body.menu-open {
        overflow: hidden;
    }
}