:root {
    /* TikTokインスパイアドカラー（エンタープライズ向け調整版） */
    --tiktok-black: #000000;
    --tiktok-dark: #161823;
    --tiktok-red: #FE2C55;
    --tiktok-red-dark: #EA284E;
    --tiktok-blue: #25F4EE;
    --tiktok-purple: #6C5CE7;
    
    /* エンタープライズ向けニュートラルカラー */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F8F8;
    --bg-tertiary: #F0F0F2;
    --bg-dark: #0F0F0F;
    
    --text-primary: #161823;
    --text-secondary: #545454;
    --text-muted: #86878B;
    --text-on-dark: #FFFFFF;
    
    --border-light: #E6E6E8;
    --border-medium: #D0D0D2;
    
    /* グラデーション */
    --gradient-tiktok: linear-gradient(135deg, #FE2C55 0%, #25F4EE 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(254, 44, 85, 0.1) 0%, rgba(37, 244, 238, 0.1) 100%);
}

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

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ヘッダー */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo {
    font-size: 24px;
    font-weight: 900;
    background: var(--gradient-tiktok);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-img {
    height: 32px;
    width: auto;
    display: block;
}

.platform {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 4px 12px;
    background: var(--bg-tertiary);
    border-radius: 20px;
}

.nav-menu {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
    position: relative;
}

.nav-link:hover {
    color: var(--tiktok-red);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--tiktok-red);
    transition: width 0.2s;
}

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

.cta-button {
    background: var(--tiktok-black);
    color: white;
    padding: 10px 24px;
    border-radius: 24px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    display: inline-block;
}

.cta-button:hover {
    background: var(--tiktok-red);
    transform: scale(1.05);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ヒーローセクション */
.hero-section {
    margin-top: 72px;
    padding: 80px 0;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: var(--gradient-subtle);
    border-radius: 50%;
    filter: blur(100px);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    max-width: 600px;
}

.hero-badge {
    display: inline-block;
    background: var(--gradient-tiktok);
    color: white;
    padding: 8px 20px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 24px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-title {
    font-size: 48px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.highlight {
    background: var(--gradient-tiktok);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.6;
}

.hero-cta-group {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.cta-button.primary {
    background: var(--tiktok-red);
    font-size: 16px;
    padding: 14px 32px;
}

.cta-button.primary:hover {
    background: var(--tiktok-red-dark);
    box-shadow: 0 8px 24px rgba(254, 44, 85, 0.3);
}

.hero-note {
    color: var(--text-muted);
    font-size: 14px;
}

/* ダッシュボードプレビュー */
.hero-image {
    width: 100%;
}

.dashboard-preview {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    border: 1px solid var(--border-light);
    width: 100%;
}

.dashboard-header {
    background: var(--tiktok-black);
    color: white;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dashboard-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.live-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--tiktok-blue);
}

.live-indicator::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--tiktok-blue);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
    100% { opacity: 1; transform: scale(1); }
}

.dashboard-content {
    padding: 24px;
}

.metric-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.metric-card {
    background: var(--bg-tertiary);
    padding: 20px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.2s;
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.metric-label {
    color: var(--text-secondary);
    font-size: 13px;
    display: block;
    margin-bottom: 8px;
}

.metric-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    display: block;
    margin-bottom: 4px;
}

.metric-change {
    font-size: 14px;
    font-weight: 600;
}

.positive {
    color: #00BFA5;
}

.negative {
    color: var(--tiktok-red);
}

.chart-placeholder {
    height: 200px;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
}

/* 機能セクション */
.features-section {
    padding: 100px 0;
    background: var(--bg-primary);
}

/* セクション共通スタイル */
.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 64px;
}

.section-title {
    font-size: 40px;
    font-weight: 900;
    margin-bottom: 16px;
    color: var(--text-primary);
    line-height: 1.2;
    text-align: center;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    padding: 32px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--gradient-tiktok);
    border-radius: 20px;
    opacity: 0;
    transition: opacity 0.3s;
    z-index: -1;
}

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

.feature-card:hover {
    transform: translateY(-4px);
    border-color: transparent;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.feature-header h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

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

.benefit-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.benefit-icon {
    color: var(--tiktok-red);
    font-weight: bold;
    flex-shrink: 0;
}

.status-badge {
    position: absolute;
    top: 24px;
    right: 24px;
    background: var(--tiktok-purple);
    color: white;
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
}

/* 料金セクション */
.pricing-section {
    padding: 100px 0;
    background: var(--bg-dark);
    color: var(--text-on-dark);
}

.pricing-section .section-header {
    text-align: center;
    color: var(--text-on-dark);
}

.pricing-section .section-title {
    color: var(--text-on-dark);
}

.pricing-section .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.pricing-card {
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: var(--gradient-tiktok);
    opacity: 0.05;
    transform: rotate(45deg);
}

.pricing-header {
    position: relative;
    z-index: 1;
}

.pricing-header h3 {
    font-size: 24px;
    margin-bottom: 24px;
    font-weight: 700;
}

.price {
    margin-bottom: 32px;
    position: relative;
    z-index: 1;
}

.price-value {
    font-size: 56px;
    font-weight: 900;
    background: var(--gradient-tiktok);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.price-period {
    font-size: 18px;
    color: var(--text-muted);
}

.pricing-features {
    text-align: left;
    margin-bottom: 32px;
    position: relative;
    z-index: 1;
}

.pricing-cta {
    position: relative;
    z-index: 1;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: rgba(255, 255, 255, 0.9);
}

.feature-icon {
    color: var(--tiktok-blue);
    font-size: 20px;
}

.cta-button.large {
    width: 100%;
    padding: 16px 32px;
    font-size: 18px;
}

.pricing-note {
    margin-top: 16px;
    color: var(--text-muted);
    font-size: 14px;
}

/* デモセクション */
.demo-section {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.demo-gallery {
    max-width: 1000px;
    margin: 0 auto;
}

.demo-main {
    text-align: center;
}

.demo-image {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    border: 1px solid var(--border-light);
    margin-bottom: 24px;
}

.demo-content {
    padding: 48px;
}

.demo-content h4 {
    font-size: 24px;
    margin-bottom: 32px;
    color: var(--text-secondary);
}

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

.demo-metric {
    text-align: center;
}

.demo-metric .label {
    display: block;
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
}

.demo-metric .value {
    display: block;
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.demo-metric .change {
    font-size: 14px;
    font-weight: 600;
}

.demo-caption {
    color: var(--text-secondary);
    font-size: 16px;
}

/* 登録セクション */
.registration-section {
    padding: 100px 0;
    background: var(--bg-primary);
}

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

.registration-title {
    font-size: 40px;
    font-weight: 900;
    margin-bottom: 16px;
    line-height: 1.2;
}

.registration-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.registration-benefits {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.registration-benefits .benefit-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.google-form-container {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 48px;
    border: 1px solid var(--border-light);
}

.form-header h3 {
    font-size: 24px;
    margin-bottom: 8px;
}

.form-header p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.form-description {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.form-note {
    margin-top: 24px;
    color: var(--text-muted);
    font-size: 14px;
}

/* FAQ */
.faq-section {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.faq-item {
    background: white;
    padding: 32px;
    border-radius: 16px;
    border: 1px solid var(--border-light);
    transition: all 0.2s;
}

.faq-item:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.faq-item h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* フッター */
.footer {
    background: var(--tiktok-black);
    color: var(--text-on-dark);
    padding: 64px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 64px;
    margin-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.footer-logo .logo {
    font-size: 24px;
    font-weight: 900;
    background: var(--gradient-tiktok);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.footer-logo .platform {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
}

.footer-description {
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
}

.footer-column h5 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-column a:hover {
    color: var(--tiktok-red);
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: 14px;
}

/* スティッキーCTA */
.sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--tiktok-black);
    padding: 16px 0;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
    z-index: 999;
    display: none;
}

.sticky-cta .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.sticky-text {
    color: white;
    font-weight: 600;
}

/* レスポンシブデザイン */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 24px;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 48px;
    }
}

@media (max-width: 768px) {
    /* ナビゲーション */
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 24px;
        gap: 24px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        transition: all 0.3s;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    /* ヒーロー */
    .hero-section {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-badge {
        font-size: 12px;
        padding: 6px 16px;
    }
    
    .hero-cta-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .cta-button {
        text-align: center;
        width: 100%;
    }
    
    /* ダッシュボード */
    .dashboard-header {
        padding: 16px;
    }
    
    .dashboard-header h3 {
        font-size: 14px;
    }
    
    .metric-cards {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .metric-card {
        padding: 16px;
    }
    
    .metric-value {
        font-size: 24px;
    }
    
    .chart-placeholder {
        height: 150px;
    }
    
    /* 機能セクション */
    .features-section {
        padding: 60px 0;
    }
    
    .section-header {
        margin-bottom: 48px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card {
        padding: 24px;
    }
    
    .status-badge {
        position: static;
        display: inline-block;
        margin-top: 16px;
    }
    
    /* 料金セクション */
    .pricing-section {
        padding: 60px 0;
    }
    
    .pricing-card {
        padding: 32px 24px;
    }
    
    .price-value {
        font-size: 48px;
    }
    
    /* デモセクション */
    .demo-section {
        padding: 60px 0;
    }
    
    .demo-content {
        padding: 32px 24px;
    }
    
    .demo-metrics-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    /* 登録セクション */
    .registration-section {
        padding: 60px 0;
    }
    
    .registration-title {
        font-size: 28px;
    }
    
    .registration-benefits {
        flex-direction: column;
        gap: 16px;
        align-items: center;
    }
    
    .google-form-container {
        padding: 32px 24px;
    }
    
    /* FAQ */
    .faq-section {
        padding: 60px 0;
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .faq-item {
        padding: 24px;
    }
    
    /* フッター */
    .footer {
        padding: 48px 0 24px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-column {
        text-align: center;
    }
    
    .footer-brand {
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    /* スティッキーCTA */
    .sticky-cta .container {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
    
    .sticky-text {
        font-size: 14px;
    }
    
    .sticky-cta .cta-button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .platform {
        font-size: 12px;
        padding: 3px 10px;
    }
    
    .demo-content h4 {
        font-size: 20px;
    }
    
    .demo-metric .value {
        font-size: 28px;
    }
}

/* アニメーション */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.6s ease forwards;
}

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