:root {
    --primary-color: #FF468D;
    --secondary-color: #FFE8EF;
    --text-color: #333333;
    --background-color: #FFFFFF;
    --gray-color: #F5F5F5;
}

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

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

/* ヘッダーとナビゲーション */
header {
    background: linear-gradient(135deg, var(--primary-color), #FF7BAC);
    color: white;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 70, 141, 0.95);
    z-index: 1000;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 2rem;
    font-weight: 700;
    color: white;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
    white-space: nowrap;
}

.nav-links a:hover {
    opacity: 0.8;
}

/* ヒーローセクション */
.hero {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6rem 5% 2rem;
    max-width: 1600px;
    margin: 0 auto;
    gap: 4rem;
    height: calc(100vh - 2rem);
}

.hero-content {
    flex: 1;
    text-align: left;
    max-width: 600px;
    z-index: 1;
}

.hero-visual {
    flex: 1.2;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-kv {
    max-width: 100%;
    height: auto;
    border-radius: 30px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    transform: scale(1.1);
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

/* ボタン */
.cta-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1.2rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn i {
    font-size: 1.2rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

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

/* 特徴セクション */
#features {
    padding: 5rem 5%;
    background-color: var(--background-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* 使い方セクション */
#how-it-works {
    padding: 5rem 5%;
    background-color: var(--gray-color);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.step {
    text-align: center;
    padding: 2rem;
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.5rem;
    font-weight: 700;
}

/* お問い合わせ�クション */
#contact {
    padding: 5rem 5%;
    background-color: var(--gray-color);
    text-align: center;
}

.contact-description {
    max-width: 600px;
    margin: 1.5rem auto;
    color: #666;
}

.contact-button-container {
    margin-top: 2rem;
}

.contact-button {
    font-size: 1.1rem;
    padding: 1.2rem 3rem;
    background-color: var(--primary-color);
    color: white;
}

.contact-button:hover {
    background-color: #ff5c9e;
    color: white;
}

.contact-button i {
    margin-right: 0.5rem;
}

/* ッター */
footer {
    background-color: #333;
    color: white;
    padding: 4rem 5% 2rem;
}

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

.footer-section h4 {
    margin-bottom: 1rem;
}

.footer-section a {
    color: white;
    text-decoration: none;
    display: block;
    margin: 0.5rem 0;
    opacity: 0.8;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    font-size: 1.5rem;
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.social-links a:hover {
    opacity: 1;
}

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

/* 共通スタイル */
h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* レスポンシブデザイン */
@media (max-width: 1200px) {
    .hero {
        padding-top: 5rem;
        gap: 2rem;
    }

    .hero h1 {
        font-size: 3.5rem;
    }

    .hero-kv {
        transform: scale(1.05);
    }
}

@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        justify-content: center;
        text-align: center;
        height: auto;
        min-height: calc(100vh - 2rem);
        padding-top: 4rem;
    }

    .hero-content {
        text-align: center;
    }

    .hero-visual {
        order: -1;
        margin: 2rem 0;
    }

    .hero-kv {
        max-width: 90%;
        transform: scale(1);
    }

    .cta-buttons {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .hero {
        padding-top: 5rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .hero-kv {
        max-width: 100%;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        padding: 1rem 2rem;
        justify-content: center;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }

    nav {
        padding: 1rem 3%;
    }

    .logo {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .nav-links {
        gap: 0.8rem;
        font-size: 0.8rem;
    }
}

/* スクリーンショット */
#screenshots {
    padding: 5rem 5%;
    background-color: var(--background-color);
    overflow: hidden;
}

.screenshots-container {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.screenshot-item {
    flex: 1;
    max-width: 400px;
    text-align: center;
    padding: 2rem;
}

.screenshot-img {
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.screenshot-img:hover {
    transform: translateY(-10px);
}

.screenshot-item h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.screenshot-item p {
    color: #666;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .screenshots-container {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
    }

    .screenshot-item {
        max-width: 100%;
        padding: 1rem;
    }

    .screenshot-img {
        max-width: 300px;
        margin: 0 auto 1.5rem;
    }
}

/* スプラッシュ画面 */
#splash {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), #FF7BAC);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    animation: fadeOut 0.5s ease 2.5s forwards;
}

.splash-content {
    text-align: center;
    animation: scaleUp 0.5s ease;
}

.splash-icon {
    margin-bottom: 1rem;
    animation: bounce 2s ease infinite;
}

.splash-logo {
    width: 120px;
    height: 120px;
    border-radius: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.splash-text {
    color: white;
    font-size: 2.5rem;
    font-weight: 700;
    opacity: 0;
    animation: fadeIn 0.5s ease 0.5s forwards;
}

@keyframes fadeOut {
    from {
        opacity: 1;
        visibility: visible;
    }
    to {
        opacity: 0;
        visibility: hidden;
    }
}

@keyframes scaleUp {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-20px);
    }
    60% {
        transform: translateY(-10px);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* モーダル */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    overflow-y: auto;
}

.modal:target {
    display: block;
}

.modal-content {
    background: white;
    max-width: 800px;
    margin: 50px auto;
    padding: 2rem;
    border-radius: 15px;
    position: relative;
}

.modal-close {
    position: sticky;
    bottom: 20px;
    display: block;
    width: 200px;
    margin: 2rem auto 0;
    padding: 1rem;
    background: var(--primary-color);
    color: white;
    text-align: center;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
}

.legal-content {
    margin-top: 2rem;
}

.legal-list {
    display: grid;
    gap: 2rem;
}

.legal-list dt {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.legal-list dd {
    line-height: 1.8;
}

.legal-list dd h4 {
    margin: 1rem 0 0.5rem;
    font-size: 1rem;
}

.legal-list dd p {
    margin-bottom: 0.5rem;
}

@media (max-width: 768px) {
    .modal-content {
        margin: 20px;
        padding: 1.5rem;
    }

    .legal-list {
        gap: 1.5rem;
    }
}

/* データ削除ページ */
.deletion-list {
    list-style: none;
    margin: 1rem 0;
    padding: 0;
}

.deletion-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.deletion-list li::before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: 0.5rem;
}

.notice-box {
    background-color: #FFF5F8;
    border: 1px solid var(--primary-color);
    border-radius: 10px;
    padding: 1.5rem;
    margin-top: 2rem;
}

.notice-box p {
    margin-bottom: 0.5rem;
}

.notice-box p:last-child {
    margin-bottom: 0;
}

.legal-content h3 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin: 2rem 0 1rem;
}

.legal-content h3:first-child {
    margin-top: 0;
}

@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        text-align: center;
    }

    .hero-visual {
        order: -1;
        margin-bottom: 2rem;
    }

    .hero-kv {
        max-width: 80%;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-kv {
        max-width: 100%;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn.secondary {
        margin-left: 0;
    }
}

.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9のアスペクト比 */
    margin-top: 1rem;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 12px;
}

/* インフルエンサー向けセクション */
#for-influencers {
    padding: 5rem 5%;
    background-color: var(--secondary-color);
}

.influencer-content {
    max-width: 1200px;
    margin: 3rem auto 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.influencer-text h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.influencer-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
}

@media (max-width: 1024px) {
    .influencer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
}

#faq {
    padding: 80px 20px;
    background-color: #f8f9fa;
}

.faq-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 30px;
    padding: 20px;
}

.faq-item {
    background: white;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.faq-item h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.4em;
}

.faq-qa {
    margin-bottom: 20px;
}

.faq-question {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 10px;
}

.faq-question i {
    color: #007AFF;
    font-size: 1.2em;
    margin-top: 3px;
}

.faq-question p {
    font-weight: 600;
    color: #333;
    margin: 0;
}

.faq-answer {
    margin-left: 28px;
    color: #666;
    line-height: 1.6;
}

.faq-answer p {
    margin: 0;
}

@media (max-width: 768px) {
    .faq-container {
        grid-template-columns: 1fr;
    }
    
    .faq-item {
        padding: 20px;
    }
}