:root {
        --primary-color: #2c3e50;
        --accent-color: #27ae60;
        --accent-light: #2ecc71;
        --text-main: #333333;
        --text-light: #666666;
        --bg-light: #f8f9fa;
        --bg-dark: #1a252f;
        --border-color: #e0e0e0;
        --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

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

    body {
        font-family: var(--font-family);
        color: var(--text-main);
        line-height: 1.6;
        background-color: var(--bg-light);
        overflow-x: hidden;
    }

    a {
        text-decoration: none;
        color: inherit;
    }

    ul {
        list-style: none;
    }

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

    /* Header & Nav */
    .site-header {
        background-color: #ffffff;
        box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        position: sticky;
        top: 0;
        z-index: 100;
    }

    .header-inner {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 64px;
    }

    .brand {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.2rem;
        font-weight: bold;
        color: var(--primary-color);
    }

    .brand img {
        height: 32px;
        border-radius: 6px;
    }

    .nav-links {
        display: none;
    }

    .nav-links a {
        margin-left: 20px;
        font-size: 0.95rem;
        color: var(--text-light);
        transition: color 0.3s;
    }

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

    /* Hero Section */
    .hero {
        background: linear-gradient(135deg, #1a252f 0%, #2c3e50 100%);
        color: #ffffff;
        padding: 60px 20px;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    .hero::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: radial-gradient(circle, rgba(39, 174, 96, 0.1) 0%, transparent 60%);
        animation: rotate 20s linear infinite;
    }

    @keyframes rotate {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }

    .hero-content {
        position: relative;
        z-index: 1;
        max-width: 800px;
        margin: 0 auto;
    }

    .hero h1 {
        font-size: 2rem;
        margin-bottom: 20px;
        line-height: 1.3;
    }

    .hero p {
        font-size: 1.1rem;
        color: #cccccc;
        margin-bottom: 40px;
    }

    .download-group {
        display: flex;
        flex-direction: column;
        gap: 15px;
        align-items: center;
        margin-bottom: 30px;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 12px 30px;
        border-radius: 30px;
        font-size: 1rem;
        font-weight: bold;
        transition: transform 0.2s, box-shadow 0.2s;
        width: 100%;
        max-width: 300px;
    }

    .btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    }

    .btn-android {
        background-color: var(--accent-color);
        color: #ffffff;
    }

    .btn-ios {
        background-color: #ffffff;
        color: var(--primary-color);
    }

    .btn-other {
        background-color: transparent;
        color: #ffffff;
        border: 1px solid rgba(255,255,255,0.5);
    }

    .hero-visual {
        margin-top: 40px;
        position: relative;
    }

    .hero-slider {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        gap: 15px;
        padding-bottom: 20px;
        -webkit-overflow-scrolling: touch;
    }

    .hero-slider::-webkit-scrollbar {
        display: none;
    }

    .hero-slider img {
        scroll-snap-align: center;
        width: 140px;
        height: 200px;
        object-fit: cover;
        border-radius: 10px;
        box-shadow: 0 5px 15px rgba(0,0,0,0.3);
        flex-shrink: 0;
    }

    /* Section Common */
    .section {
        padding: 60px 20px;
        max-width: 1200px;
        margin: 0 auto;
    }

    .section-title {
        text-align: center;
        font-size: 1.8rem;
        color: var(--primary-color);
        margin-bottom: 40px;
        position: relative;
    }

    .section-title::after {
        content: '';
        display: block;
        width: 50px;
        height: 4px;
        background-color: var(--accent-color);
        margin: 10px auto 0;
        border-radius: 2px;
    }

    /* Exclusive & Layout */
    .exclusive-layout {
        display: flex;
        flex-direction: column;
        gap: 30px;
    }

    .exclusive-left {
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }

    .exclusive-left img {
        border-radius: 12px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }

    .exclusive-right {
        flex: 1;
    }

    .exclusive-list {
        display: flex;
        flex-direction: column;
        gap: 15px;
    }

    .exclusive-item {
        background: #ffffff;
        padding: 15px;
        border-radius: 10px;
        border-left: 4px solid var(--accent-color);
        box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    }

    .exclusive-item h3 {
        font-size: 1.1rem;
        margin-bottom: 5px;
        color: var(--primary-color);
    }

    .exclusive-item p {
        font-size: 0.9rem;
        color: var(--text-light);
    }

    /* Magic Calendar Timeline */
    .timeline-section {
        background-color: #ffffff;
        border-radius: 16px;
        padding: 40px 20px;
        margin-bottom: 40px;
        box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    }

    .timeline-container {
        position: relative;
        max-width: 600px;
        margin: 0 auto;
        padding-left: 30px;
        border-left: 3px solid var(--accent-light);
    }

    .timeline-item {
        position: relative;
        margin-bottom: 25px;
    }

    .timeline-item::before {
        content: '';
        position: absolute;
        left: -37px;
        top: 5px;
        width: 12px;
        height: 12px;
        border-radius: 50%;
        background-color: var(--accent-color);
        border: 3px solid #ffffff;
        box-shadow: 0 0 0 2px var(--accent-light);
    }

    .timeline-time {
        font-weight: bold;
        color: var(--accent-color);
        font-size: 1rem;
        margin-bottom: 5px;
    }

    .timeline-content {
        background: var(--bg-light);
        padding: 12px 15px;
        border-radius: 8px;
        font-size: 0.95rem;
        color: var(--text-main);
    }

    /* Wish & Grid */
    .grid-2 {
        display: grid;
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .wish-card, .review-card {
        background: #ffffff;
        padding: 20px;
        border-radius: 12px;
        box-shadow: 0 4px 10px rgba(0,0,0,0.05);
        display: flex;
        gap: 15px;
        align-items: flex-start;
    }

    .wish-card img, .review-card img {
        width: 50px;
        height: 50px;
        border-radius: 50%;
        object-fit: cover;
    }

    .wish-text h3, .review-text h3 {
        font-size: 1rem;
        margin-bottom: 5px;
        color: var(--primary-color);
    }

    .wish-text p, .review-text p {
        font-size: 0.9rem;
        color: var(--text-light);
    }

    /* Poster Gallery */
    .gallery-section {
        background-color: #ffffff;
        padding: 60px 20px;
    }

    .gallery-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        max-width: 1200px;
        margin: 0 auto;
    }

    .gallery-item {
        position: relative;
        border-radius: 10px;
        overflow: hidden;
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        aspect-ratio: 2 / 3;
    }

    .gallery-item img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.3s;
    }

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

    .gallery-info {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        background: linear-gradient(transparent, rgba(0,0,0,0.8));
        padding: 30px 10px 10px;
        color: #ffffff;
    }

    .gallery-info h3 {
        font-size: 1rem;
        margin-bottom: 4px;
    }

    .gallery-info p {
        font-size: 0.8rem;
        opacity: 0.8;
    }

    .tag {
        display: inline-block;
        background: var(--accent-color);
        color: white;
        padding: 2px 6px;
        border-radius: 4px;
        font-size: 0.7rem;
        margin-top: 5px;
    }

    /* Privacy */
    .privacy-list {
        display: flex;
        flex-direction: column;
        gap: 15px;
    }
    
    .privacy-item {
        background: var(--bg-light);
        padding: 20px;
        border-radius: 10px;
        border: 1px solid var(--border-color);
    }

    .privacy-item h3 {
        font-size: 1.1rem;
        color: var(--primary-color);
        margin-bottom: 10px;
    }

    .privacy-item p {
        font-size: 0.95rem;
        color: var(--text-light);
    }

    /* Platform News */
    .news-list {
        display: flex;
        flex-direction: column;
        gap: 15px;
    }

    .news-item {
        background: #ffffff;
        padding: 15px 20px;
        border-radius: 10px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-left: 3px solid var(--primary-color);
    }

    .news-item h3 {
        font-size: 1rem;
        color: var(--primary-color);
    }

    .news-item span {
        font-size: 0.85rem;
        color: var(--text-light);
    }

    /* Install Steps */
    .install-steps {
        background-color: #ffffff;
        padding: 40px 20px;
        border-radius: 16px;
        box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        margin-bottom: 40px;
    }

    .step-list {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }

    .step-item {
        display: flex;
        gap: 15px;
        align-items: flex-start;
    }

    .step-num {
        width: 30px;
        height: 30px;
        background-color: var(--accent-color);
        color: #ffffff;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: bold;
        flex-shrink: 0;
    }

    .step-content h3 {
        font-size: 1rem;
        margin-bottom: 5px;
        color: var(--primary-color);
    }

    .step-content p {
        font-size: 0.9rem;
        color: var(--text-light);
    }

    /* Footer */
    .site-footer {
        background-color: var(--bg-dark);
        color: #8899a6;
        padding: 30px 20px;
        text-align: center;
        font-size: 0.85rem;
    }

    .site-footer p {
        margin-bottom: 10px;
    }

    .site-footer a {
        color: #8899a6;
        text-decoration: underline;
    }

    .time-updated {
        color: #667788;
        font-size: 0.8rem;
    }

    /* Dialog */
    .dialog-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.5);
        z-index: 1000;
        align-items: center;
        justify-content: center;
        padding: 20px;
    }

    .dialog-overlay.active {
        display: flex;
    }

    .dialog-box {
        background: #ffffff;
        padding: 30px;
        border-radius: 16px;
        max-width: 400px;
        width: 100%;
        text-align: center;
    }

    .dialog-box h3 {
        font-size: 1.1rem;
        margin-bottom: 15px;
        color: var(--text-main);
    }

    .dialog-link {
        background: var(--bg-light);
        padding: 10px;
        border-radius: 8px;
        word-break: break-all;
        font-size: 0.9rem;
        color: var(--accent-color);
        margin-bottom: 20px;
        border: 1px solid var(--border-color);
        user-select: all;
        -webkit-user-select: all;
    }

    .dialog-btn {
        background: var(--accent-color);
        color: #ffffff;
        border: none;
        padding: 10px 30px;
        border-radius: 30px;
        font-size: 1rem;
        cursor: pointer;
        width: 100%;
    }

    .dialog-close {
        display: block;
        margin-top: 15px;
        color: var(--text-light);
        font-size: 0.85rem;
        cursor: pointer;
        text-decoration: underline;
    }

    /* Responsive */
    @media (min-width: 768px) {
        .nav-links { display: flex; }
        .hero h1 { font-size: 2.5rem; }
        .download-group { flex-direction: row; justify-content: center; flex-wrap: wrap; }
        .btn { width: auto; }
        .exclusive-layout { flex-direction: row; align-items: flex-start; }
        .exclusive-left { margin: 0; width: 250px; flex-shrink: 0; }
        .grid-2 { grid-template-columns: repeat(2, 1fr); }
        .gallery-grid { grid-template-columns: repeat(3, 1fr); }
        .step-list { flex-direction: row; flex-wrap: wrap; }
        .step-item { flex: 1; min-width: 200px; }
        .privacy-list { flex-direction: row; flex-wrap: wrap; }
        .privacy-item { flex: 1; min-width: 300px; }
        .news-item { flex-direction: row; }
        .hero-slider img { width: 160px; height: 230px; }
    }

    @media (min-width: 1024px) {
        .hero h1 { font-size: 3rem; }
        .section { padding: 80px 20px; }
        .gallery-grid { grid-template-columns: repeat(4, 1fr); gap: 20px; }
        .hero-slider img { width: 180px; height: 260px; }
        .grid-2 { grid-template-columns: repeat(3, 1fr); }
        .grid-2 .wish-card { grid-column: span 1; }
    }