/* ================================================
   福岡コンパ（フクコン） - CSS Styles
   ================================================ */

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

:root {
    /* メインカラー */
    --mentai-orange: #FF6B6B;
    --mentai-deep-red: #FF8B94;
    --mentai-light-orange: #FFB6B9;
    --mentai-accent: #FFF0F3;
    
    /* ニュートラルカラー */
    --white: #FFFFFF;
    --black: #1A1A1A;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* フォント */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-accent: 'Poppins', sans-serif;
    
    /* シャドウ */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* トランジション */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--gray-800);
    line-height: 1.7;
    background-color: var(--white);
    overflow-x: hidden;
}

.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: var(--transition);
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    transition: var(--transition);
}

/* ==================== 
   ヘッダー 
   ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: var(--transition);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-accent);
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--mentai-orange);
}

.logo i {
    font-size: 2rem;
    color: var(--mentai-deep-red);
}

.logo-text {
    line-height: 1.2;
}

.logo-sub {
    font-size: 0.7em;
    font-weight: 600;
    opacity: 0.8;
}

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

.nav-link {
    font-weight: 500;
    color: var(--gray-700);
    position: relative;
}

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

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

.nav-link:hover {
    color: var(--mentai-orange);
}

.cta-button {
    background: linear-gradient(135deg, var(--mentai-orange), var(--mentai-deep-red));
    color: var(--white);
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 30px;
    height: 30px;
    justify-content: center;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--mentai-orange);
    transition: var(--transition);
}

/* ==================== 
   ヒーローセクション 
   ==================== */
.hero {
    margin-top: 80px;
    min-height: 90vh;
    background: linear-gradient(135deg, #FFF0F3 0%, #FFE3E7 25%, #FFD1DC 50%, #FFE3E7 75%, #FFF0F3 100%);
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-overlay {
    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 1200 600"><defs><pattern id="dots" x="0" y="0" width="40" height="40" patternUnits="userSpaceOnUse"><circle cx="2" cy="2" r="1" fill="%23FF6B35" opacity="0.1"/></pattern></defs><rect fill="url(%23dots)" width="1200" height="600"/></svg>');
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 80px 0;
}

.hero-badge {
    display: inline-block;
    background: var(--white);
    color: var(--mentai-deep-red);
    padding: 10px 24px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
    box-shadow: var(--shadow-lg);
    border: 3px solid var(--mentai-orange);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 25px;
    color: var(--gray-900);
}

.title-line1 {
    display: block;
    background: linear-gradient(135deg, #FF6B6B, #FF8B94, #FFB6B9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: rainbow 3s ease infinite;
}

@keyframes rainbow {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.title-line2 {
    display: block;
    color: var(--gray-800);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 60px;
    justify-content: center;
    margin-top: 60px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--mentai-deep-red);
    font-family: var(--font-accent);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray-600);
    margin-top: 5px;
}

.hero-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    overflow: hidden;
    pointer-events: none;
}

.pepper-icon {
    position: absolute;
    font-size: 80px;
    color: var(--mentai-orange);
    opacity: 0.15;
    animation: float 6s ease-in-out infinite;
}

.pepper-1 {
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.pepper-2 {
    top: 60%;
    right: 10%;
    animation-delay: 2s;
}

.pepper-3 {
    bottom: 15%;
    left: 15%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(10deg);
    }
}

/* ==================== 
   ボタンスタイル 
   ==================== */
.btn {
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, #FF6B6B, #FF8B94);
    color: var(--white);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

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

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

.btn-large {
    padding: 16px 40px;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ==================== 
   セクション共通スタイル 
   ==================== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-block;
    background: linear-gradient(135deg, #FF6B6B, #FF8B94);
    color: var(--white);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 800;
    letter-spacing: 2px;
    margin-bottom: 15px;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
    animation: pulse 2s ease infinite;
}

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

.section-title {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--gray-900);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray-600);
}

/* ==================== 
   ABOUTセクション 
   ==================== */
.about {
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-heading {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 25px;
    line-height: 1.4;
}

.about-description {
    color: var(--gray-600);
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.about-features {
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.feature-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.feature-item i {
    font-size: 2rem;
    color: var(--mentai-orange);
    flex-shrink: 0;
}

.feature-item h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 5px;
}

.feature-item p {
    color: var(--gray-600);
    font-size: 0.95rem;
}

.about-image {
    position: relative;
}

.image-card {
    background: var(--gray-100);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.image-placeholder {
    aspect-ratio: 4/3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--mentai-light-orange), var(--mentai-orange));
    color: var(--white);
    padding: 40px;
    text-align: center;
}

.image-placeholder i {
    font-size: 5rem;
    margin-bottom: 20px;
    opacity: 0.9;
}

.image-placeholder p {
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.6;
}

/* ==================== 
   EVENTSセクション 
   ==================== */
.events {
    background: var(--gray-50);
}

.event-categories {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.category-btn {
    padding: 10px 24px;
    border-radius: 50px;
    background: var(--white);
    color: var(--gray-700);
    font-weight: 600;
    border: 2px solid var(--gray-200);
}

.category-btn.active,
.category-btn:hover {
    background: linear-gradient(135deg, var(--mentai-orange), var(--mentai-deep-red));
    color: var(--white);
    border-color: transparent;
}

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

.event-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.event-image {
    position: relative;
    background: var(--gray-200);
}

.event-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--white);
    z-index: 10;
}

.event-badge.hot {
    background: #FF6B6B;
    animation: bounce 1s ease infinite;
}

.event-badge.new {
    background: #FF8B94;
    animation: shake 0.5s ease infinite;
}

.event-badge.premium {
    background: linear-gradient(135deg, #FFD700, #FFA500);
    animation: sparkle 1.5s ease infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

@keyframes shake {
    0%, 100% {
        transform: rotate(0deg);
    }
    25% {
        transform: rotate(-3deg);
    }
    75% {
        transform: rotate(3deg);
    }
}

@keyframes sparkle {
    0%, 100% {
        box-shadow: 0 0 5px rgba(255, 215, 0, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(255, 215, 0, 0.8);
    }
}

.event-image .image-placeholder {
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, var(--mentai-accent), var(--mentai-light-orange));
}

.event-image .image-placeholder i {
    font-size: 4rem;
    color: var(--white);
}

.event-content {
    padding: 25px;
}

.event-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 10px;
}

.event-date {
    color: var(--gray-500);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.event-level {
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
}

.event-level.spicy-1 {
    background: #E8F5E9;
    color: #2E7D32;
}

.event-level.spicy-2 {
    background: #FFF3E0;
    color: #E65100;
}

.event-level.spicy-3 {
    background: #FFEBEE;
    color: #C62828;
}

.event-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.event-description {
    color: var(--gray-600);
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.7;
}

.event-info {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
    padding: 15px;
    background: var(--gray-50);
    border-radius: 10px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--gray-600);
}

.info-item i {
    color: var(--mentai-orange);
    width: 16px;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--gray-50);
    padding: 35px;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.feature-icon {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, #FF6B6B, #FFB6B9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2.2rem;
    color: var(--white);
    box-shadow: 0 8px 20px rgba(255, 107, 107, 0.3);
}

.feature-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 15px;
}

.feature-description {
    color: var(--gray-600);
    line-height: 1.7;
}

/* ==================== 
   VOICEセクション 
   ==================== */
.voice {
    background: var(--gray-50);
}

.voice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
    gap: 30px;
}

.voice-card {
    background: var(--white);
    padding: 30px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    position: relative;
}

.voice-header {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.voice-avatar {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--mentai-orange), var(--mentai-deep-red));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.voice-info {
    flex: 1;
}

.voice-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 5px;
}

.voice-event {
    font-size: 0.85rem;
    color: var(--gray-500);
}

.voice-rating {
    display: flex;
    gap: 3px;
    color: #FFD700;
    font-size: 0.9rem;
}

.voice-text {
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: 15px;
}

.voice-label {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.voice-label.success {
    background: #E8F5E9;
    color: #2E7D32;
}

.voice-label:not(.success) {
    background: var(--mentai-accent);
    color: var(--mentai-deep-red);
}

/* ==================== 
   HOW IT WORKSセクション 
   ==================== */
.how-it-works {
    background: var(--white);
}

.steps-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.step-card {
    flex: 1;
    background: var(--gray-50);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    position: relative;
    border: 3px solid transparent;
    transition: var(--transition);
}

.step-card:hover {
    border-color: var(--mentai-orange);
    transform: translateY(-5px);
}

.step-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--mentai-orange), var(--mentai-deep-red));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 900;
    font-family: var(--font-accent);
}

.step-icon {
    width: 80px;
    height: 80px;
    background: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: var(--mentai-orange);
    box-shadow: var(--shadow-md);
}

.step-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.step-description {
    color: var(--gray-600);
    line-height: 1.7;
    font-size: 0.95rem;
}

.step-arrow {
    font-size: 2rem;
    color: var(--mentai-orange);
}

/* ==================== 
   FAQセクション 
   ==================== */
.faq {
    background: var(--gray-50);
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: 15px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    padding: 25px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-900);
    text-align: left;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--mentai-orange);
}

.faq-question i {
    color: var(--mentai-orange);
    transition: var(--transition);
    font-size: 1rem;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

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

.faq-answer p {
    padding: 0 30px 25px;
    color: var(--gray-600);
    line-height: 1.8;
}

/* ==================== 
   CONTACTセクション 
   ==================== */
.contact {
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.95rem;
}

.required {
    color: var(--mentai-deep-red);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 18px;
    border: 2px solid var(--gray-200);
    border-radius: 10px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--mentai-orange);
}

.form-group textarea {
    resize: vertical;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.info-card {
    background: var(--gray-50);
    padding: 25px;
    border-radius: 15px;
    border-left: 4px solid var(--mentai-orange);
}

.info-card i {
    font-size: 1.5rem;
    color: var(--mentai-orange);
    margin-bottom: 10px;
}

.info-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.info-card p {
    color: var(--gray-600);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* ==================== 
   フッター 
   ==================== */
.footer {
    background: linear-gradient(135deg, var(--gray-900), var(--gray-800));
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-accent);
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--white);
    margin-bottom: 15px;
}

.footer-logo i {
    font-size: 2rem;
    color: var(--mentai-orange);
}

.footer-description {
    color: var(--gray-400);
    line-height: 1.7;
    margin-bottom: 20px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--mentai-orange);
    transform: translateY(-3px);
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--gray-400);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--mentai-orange);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray-400);
}

/* ==================== 
   トップに戻るボタン 
   ==================== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #FF6B6B, #FFB6B9);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

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

/* ==================== 
   レスポンシブデザイン 
   ==================== */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .steps-container {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .voice-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        background: var(--white);
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
        padding: 30px 20px;
    }
    
    .nav.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 20px;
    }
    
    .cta-button {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-stats {
        gap: 30px;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .events-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}