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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --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);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'BIZ UDPGothic', 'BIZ UDPMincho', 'Noto Serif JP', 'ヒラギノ明朝 ProN', 'Hiragino Mincho ProN', 'Yu Mincho', '游明朝', YuMincho, 'HG明朝E', 'MS P明朝', 'MS 明朝', sans-serif;
    line-height: 1.8;
    color: var(--text-dark);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
}

/* モバイルタッチ最適化 */
a, button, input, select, textarea {
    -webkit-tap-highlight-color: rgba(37, 99, 235, 0.3);
    touch-action: manipulation;
}

button, a {
    min-height: 44px;
    min-width: 44px;
}

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

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

/* ========================================
   ヘッダー
   ======================================== */
.header {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.logo a {
    text-decoration: none;
}

.logo-text {
    font-size: 24px;
    font-weight: 900;
    color: var(--primary-color);
    letter-spacing: 1px;
}

.header-nav {
    flex: 1;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 32px;
    margin: 0;
    padding: 0;
}

.nav-list a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
    position: relative;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

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

.header-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--success-color);
    color: white;
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    white-space: nowrap;
}

.header-phone:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.header-phone i {
    font-size: 16px;
}

/* ========================================
   ヒーローセクション
   ======================================== */
.hero {
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0 80px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-image: url('https://www.genspark.ai/api/files/s/Dlb6iZGQ');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.8;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.7) 0%, rgba(118, 75, 162, 0.7) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 10px 24px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-title {
    font-size: 48px;
    font-weight: 900;
    line-height: 1.3;
    margin-bottom: 24px;
}

.hero-title .highlight {
    color: #fbbf24;
    text-shadow: 0 0 20px rgba(251, 191, 36, 0.5);
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-subtitle .emphasis {
    font-size: 28px;
    font-weight: 700;
    color: #fbbf24;
}

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

.stat {
    text-align: center;
}

.stat-number {
    font-size: 48px;
    font-weight: 900;
    font-family: 'Inter', sans-serif;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
}

/* ========================================
   デジタルサイネージ投資とは
   ======================================== */
.what-is-investment {
    padding: 80px 0;
    background: var(--bg-light);
}

.investment-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.investment-title {
    font-size: 36px;
    font-weight: 900;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.investment-intro {
    font-size: 18px;
    color: var(--text-gray);
    margin-bottom: 32px;
    line-height: 1.8;
}

.investment-subtitle {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.investment-features {
    list-style: none;
    margin-bottom: 24px;
}

.investment-features li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    line-height: 1.7;
}

.investment-features strong {
    color: var(--primary-color);
}

.investment-merit,
.investment-target {
    background: white;
    padding: 20px;
    border-radius: 12px;
    margin-top: 16px;
    box-shadow: var(--shadow-sm);
    line-height: 1.8;
}

.investment-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.signage-examples {
    width: 100%;
}

.example-card {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
}

.example-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.example-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.example-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.example-grid .example-card img {
    aspect-ratio: 4/3;
}

/* ========================================
   収益シミュレーター
   ======================================== */
.calculator {
    padding: 80px 0;
    background: white;
}

.calculator-wrapper {
    background: var(--bg-light);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.calculator-header {
    text-align: center;
    margin-bottom: 40px;
}

.calculator-header h2 {
    font-size: 32px;
    font-weight: 900;
    color: var(--text-dark);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.calculator-header h2 i {
    color: var(--primary-color);
}

.calculator-header p {
    color: var(--text-gray);
    font-size: 16px;
}

.calculator-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
}

.calculator-input label {
    display: block;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.input-group {
    position: relative;
    margin-bottom: 32px;
}

.input-group input {
    width: 100%;
    padding: 16px;
    padding-right: 60px;
    font-size: 18px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    outline: none;
    transition: all 0.3s ease;
}

.input-group input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.input-suffix {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-weight: 600;
    color: var(--text-gray);
}

.tax-rate-selector label {
    display: block;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.rate-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.rate-btn {
    padding: 12px 20px;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    text-align: left;
}

.rate-btn:hover {
    border-color: var(--primary-color);
}

.rate-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.calculator-results {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.result-card {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.result-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.result-label {
    font-size: 14px;
    color: var(--text-gray);
    margin-bottom: 8px;
}

.result-value {
    font-size: 32px;
    font-weight: 900;
    color: var(--primary-color);
    font-family: 'Inter', sans-serif;
    margin-bottom: 8px;
}

.result-value.highlight {
    color: var(--success-color);
}

.result-note {
    font-size: 12px;
    color: var(--text-gray);
}

/* ========================================
   投資の流れ
   ======================================== */
.benefits,
.features,
.process,
.faq {
    padding: 80px 0;
}

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

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

.section-badge {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 36px;
    font-weight: 900;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-gray);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.benefit-card {
    background: white;
    padding: 40px 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.benefit-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 36px;
    color: white;
}

.benefit-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.benefit-amount {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 16px;
}

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

.benefit-list {
    list-style: none;
}

.benefit-list li {
    padding: 8px 0;
    color: var(--text-gray);
    display: flex;
    align-items: center;
    gap: 12px;
}

.benefit-list i {
    color: var(--success-color);
    font-size: 14px;
}

/* ========================================
   製品特徴
   ======================================== */
.features {
    background: white;
}

.features-showcase {
    display: grid;
    gap: 32px;
}

.product-images {
    margin-bottom: 32px;
}

.product-card-single {
    background: white;
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    max-width: 800px;
    margin: 0 auto;
}

.product-card-single:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.product-card-single img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
}

.feature-large {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 20px;
}

.feature-content-full {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.feature-content-full h3 {
    font-size: 28px;
    font-weight: 900;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.feature-content-full p {
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 24px;
}

.feature-specs {
    list-style: none;
}

.feature-specs li {
    padding: 12px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-gray);
}

.feature-specs i {
    color: var(--success-color);
}

.features-grid-small {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.feature-small {
    background: var(--bg-light);
    padding: 32px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-small:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-small i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.feature-small h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-small p {
    color: var(--text-gray);
    font-size: 14px;
}

/* ========================================
   導入の流れ
   ======================================== */
.process {
    background: var(--bg-light);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 16.66%;
    right: 16.66%;
    height: 2px;
    background: var(--border-color);
    z-index: 0;
}

.process-step {
    position: relative;
    text-align: center;
    z-index: 1;
}

.step-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 900;
    margin: 0 auto 24px;
    box-shadow: var(--shadow-lg);
    border: 4px solid white;
}

.step-content h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.step-content p {
    color: var(--text-gray);
    margin-bottom: 12px;
    line-height: 1.6;
}

.step-duration {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 700;
}

/* ========================================
   FAQ
   ======================================== */
.faq {
    background: white;
}

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

.faq-item {
    background: var(--bg-light);
    border-radius: 12px;
    margin-bottom: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

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

.faq-question {
    width: 100%;
    padding: 24px 28px;
    background: none;
    border: none;
    text-align: left;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    transition: all 0.3s ease;
}

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

.faq-question i {
    transition: transform 0.3s ease;
    color: var(--primary-color);
}

.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 28px 24px;
    color: var(--text-gray);
    line-height: 1.8;
}

/* ========================================
   音声プレイヤーセクション
   ======================================== */
.audio-player-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.audio-player-wrapper {
    background: white;
    border-radius: 24px;
    padding: 48px;
    box-shadow: var(--shadow-lg);
}

.audio-player-header {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    margin-bottom: 32px;
}

.audio-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #ff5500 0%, #ff8833 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: white;
    flex-shrink: 0;
    box-shadow: 0 8px 24px rgba(255, 85, 0, 0.3);
}

.audio-info {
    flex: 1;
}

.audio-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.audio-description {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.8;
}

.audio-player-embed {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.audio-player-embed {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.audio-player-embed iframe {
    display: block;
    border-radius: 12px;
}

/* ========================================
   ヒーローCTAボタン - オレンジグラデーション
   Updated: 2025-12-19
   ======================================== */
.hero-cta-button {
    margin-bottom: 40px;
}

.btn-audio-cta {
    display: inline-flex !important;
    align-items: center !important;
    gap: 12px !important;
    background: linear-gradient(135deg, #ff5500 0%, #ff8833 100%) !important;
    color: white !important;
    padding: 18px 48px !important;
    border-radius: 50px !important;
    font-size: 20px !important;
    font-weight: 700 !important;
    text-decoration: none !important;
    box-shadow: 0 8px 24px rgba(255, 85, 0, 0.4) !important;
    transition: all 0.3s ease !important;
    border: none !important;
    cursor: pointer !important;
}

.btn-audio-cta:hover {
    transform: translateY(-4px) !important;
    box-shadow: 0 12px 32px rgba(255, 85, 0, 0.5) !important;
}

.btn-audio-cta i {
    font-size: 24px !important;
    color: white !important;
}

/* ========================================
   お問い合わせフォーム
   ======================================== */
.contact {
    padding: 80px 0;
    background: var(--bg-light);
}

.contact-wrapper {
    background: white;
    border-radius: 20px;
    padding: 60px;
    box-shadow: var(--shadow-xl);
}

.contact-info {
    text-align: center;
    margin-bottom: 40px;
}

.contact-info h2 {
    font-size: 32px;
    font-weight: 900;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.contact-info p {
    color: var(--text-gray);
}

.contact-form {
    max-width: 800px;
    margin: 0 auto;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.required {
    color: var(--danger-color);
    font-size: 12px;
    font-weight: 700;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 16px;
    font-family: 'BIZ UDPGothic', 'BIZ UDPMincho', 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Meiryo', sans-serif;
    transition: all 0.3s ease;
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-hint {
    display: block;
    margin-top: 6px;
    font-size: 13px;
    color: var(--text-gray);
}

.form-privacy {
    margin: 32px 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.checkbox-label a {
    color: var(--primary-color);
    text-decoration: underline;
}

.form-submit {
    width: 100%;
    padding: 18px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 700;
    font-family: 'BIZ UDPGothic', 'BIZ UDPMincho', 'Noto Sans JP', sans-serif;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.form-submit:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.form-note {
    text-align: center;
    margin-top: 20px;
    color: var(--text-gray);
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.form-note i {
    color: var(--success-color);
}

/* ========================================
   フッター
   ======================================== */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-col-main h4,
.footer-col h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-subtitle {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 8px;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

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

.footer-col li {
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-col a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-col a:hover {
    color: var(--accent-color);
}

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    margin-bottom: 8px;
}

.footer-note {
    font-size: 12px;
}

.footer-links {
    margin-top: 16px;
    font-size: 13px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-color);
}

.footer-links span {
    margin: 0 12px;
    color: rgba(255, 255, 255, 0.4);
}

/* ソーシャルシェアボタン */
.social-share {
    margin: 24px 0;
}

.social-share-title {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 12px;
}

.social-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 18px;
}

.social-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

.social-btn.twitter {
    background: #1DA1F2;
}

.social-btn.twitter:hover {
    background: #0d8bd9;
}

.social-btn.facebook {
    background: #1877F2;
}

.social-btn.facebook:hover {
    background: #0b5ed7;
}

.social-btn.line {
    background: #00B900;
}

.social-btn.line:hover {
    background: #009900;
}

.social-btn.linkedin {
    background: #0A66C2;
}

.social-btn.linkedin:hover {
    background: #084d93;
}

/* ========================================
   トップに戻るボタン
   ======================================== */
.scroll-top {
    position: fixed;
    bottom: 280px;
    right: 30px;
    width: 56px;
    height: 56px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

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

.scroll-top:hover {
    background: var(--secondary-color);
    transform: translateY(-4px);
}

/* ========================================
   フローティングCTA
   ======================================== */
.floating-cta {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 998;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.floating-cta-phone {
    background: white;
    border-radius: 12px;
    padding: 16px 20px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 16px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.floating-cta-phone:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.floating-icon {
    width: 48px;
    height: 48px;
    background: var(--success-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

.floating-text {
    flex: 1;
}

.floating-label {
    font-size: 12px;
    color: var(--text-gray);
    margin-bottom: 4px;
}

.floating-number {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    font-family: 'Inter', sans-serif;
}

.floating-hours {
    font-size: 11px;
    color: var(--text-gray);
}

.floating-cta-contact {
    background: var(--accent-color);
    color: white;
    padding: 16px 24px;
    border-radius: 12px;
    text-align: center;
    text-decoration: none;
    font-weight: 700;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
}

.floating-cta-contact:hover {
    background: #d97706;
    transform: translateY(-2px);
}

/* ========================================
   モバイルCTA
   ======================================== */
.mobile-fixed-cta {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: white;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    padding: 12px 20px;
}

.mobile-cta-phone {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: var(--success-color);
    color: white;
    padding: 16px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    font-size: 16px;
}

/* ========================================
   レスポンシブ
   ======================================== */
@media (max-width: 1024px) {
    .investment-content,
    .feature-large {
        grid-template-columns: 1fr;
    }

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

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

    .process-timeline {
        grid-template-columns: 1fr;
    }

    .process-timeline::before {
        display: none;
    }

    .floating-cta {
        display: none;
    }

    .mobile-fixed-cta {
        display: block;
    }

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

    .product-card-single {
        padding: 20px;
    }

    .header-nav {
        display: none;
    }

    .header-phone span {
        display: none;
    }

    .header-phone {
        padding: 12px 16px;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }
    
    /* モバイルでアイコンのみ表示 */
    .header-phone span {
        display: none;
    }
    
    .header-phone {
        padding: 12px;
        min-width: 44px;
        justify-content: center;
    }

    .btn-audio-cta {
        font-size: 18px;
        padding: 16px 36px;
    }

    .btn-audio-cta i {
        font-size: 20px;
    }

    .audio-player-wrapper {
        padding: 32px 24px;
    }

    .audio-player-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .audio-icon {
        width: 64px;
        height: 64px;
        font-size: 28px;
    }

    .audio-title {
        font-size: 24px;
    }

    .audio-description {
        font-size: 14px;
    }

    .hero-subtitle .emphasis {
        font-size: 20px;
    }

    .hero-stats {
        gap: 30px;
    }

    .stat-number {
        font-size: 36px;
    }

    .investment-title,
    .section-title {
        font-size: 28px;
    }

    .calculator-wrapper {
        padding: 24px;
    }

    .calculator-results {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-wrapper {
        padding: 32px 24px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .scroll-top {
        bottom: 80px;
        right: 20px;
        width: 48px;
        height: 48px;
    }

    .features-grid-small {
        grid-template-columns: 1fr;
    }

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