:root {
        --bg-dark: #121218;
        --bg-card: #1c1c27;
        --primary: #ff4d6d;
        --primary-hover: #ff3355;
        --text-main: #f5f5fa;
        --text-sub: #a3a3b8;
        --border-color: #2a2a3a;
        --gradient-main: linear-gradient(135deg, #ff4d6d 0%, #ff8fa3 100%);
        --gradient-dark: linear-gradient(180deg, #121218 0%, #1a1a24 100%);
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", Helvetica, Arial, sans-serif;
        background-color: var(--bg-dark);
        color: var(--text-main);
        line-height: 1.6;
        overflow-x: hidden;
    }

    a {
        color: var(--primary);
        text-decoration: none;
    }

    .container {
        width: 100%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }

    /* Header */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        background: rgba(18, 18, 24, 0.9);
        backdrop-filter: blur(10px);
        z-index: 1000;
        border-bottom: 1px solid var(--border-color);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 64px;
    }

    .logo-box {
        display: flex;
        align-items: center;
        gap: 10px;
    }

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

    .logo-box span {
        font-size: 20px;
        font-weight: bold;
        background: var(--gradient-main);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .nav-links {
        display: flex;
        gap: 24px;
    }

    .nav-links a {
        color: var(--text-sub);
        font-size: 15px;
        transition: color 0.3s;
    }

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

    .nav-toggle {
        display: none;
        background: none;
        border: none;
        color: var(--text-main);
        font-size: 24px;
        cursor: pointer;
    }

    /* Hero Section */
    .hero {
        padding: 120px 0 60px;
        background: radial-gradient(circle at top right, rgba(255, 77, 109, 0.15) 0%, transparent 40%), var(--bg-dark);
        position: relative;
        overflow: hidden;
    }

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

    .hero-content {
        flex: 1;
    }

    .hero-content h1 {
        font-size: 48px;
        line-height: 1.2;
        margin-bottom: 20px;
        font-weight: 800;
    }

    .hero-content h1 span {
        color: var(--primary);
    }

    .hero-content p {
        font-size: 18px;
        color: var(--text-sub);
        margin-bottom: 40px;
        max-width: 500px;
    }

    .download-group {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 14px 28px;
        border-radius: 30px;
        font-size: 16px;
        font-weight: 600;
        transition: all 0.3s ease;
        cursor: pointer;
        text-align: center;
    }

    .btn-primary {
        background: var(--gradient-main);
        color: #fff;
        box-shadow: 0 4px 15px rgba(255, 77, 109, 0.4);
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(255, 77, 109, 0.6);
    }

    .btn-outline {
        background: transparent;
        color: var(--text-main);
        border: 1px solid var(--border-color);
    }

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

    .hero-visuals {
        flex: 1;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        position: relative;
    }

    .hero-mockup {
        border-radius: 16px;
        overflow: hidden;
        box-shadow: 0 10px 30px rgba(0,0,0,0.5);
        transform: translateY(20px);
    }
    
    .hero-mockup:nth-child(1) {
        transform: translateY(0);
    }
    .hero-mockup:nth-child(2) {
        transform: translateY(40px);
    }

    .hero-mockup img {
        width: 100%;
        height: auto;
        display: block;
    }

    /* Section Common */
    section {
        padding: 80px 0;
    }

    .section-title {
        text-align: center;
        margin-bottom: 50px;
    }

    .section-title h2 {
        font-size: 32px;
        margin-bottom: 12px;
    }

    .section-title p {
        color: var(--text-sub);
        font-size: 16px;
    }

    /* Poster Wall */
    .poster-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }

    .poster-card {
        background: var(--bg-card);
        border-radius: 12px;
        overflow: hidden;
        transition: transform 0.3s;
    }

    .poster-card:hover {
        transform: translateY(-6px);
    }

    .poster-img {
        position: relative;
        aspect-ratio: 3/4;
        overflow: hidden;
    }

    .poster-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.4s;
    }

    .poster-card:hover .poster-img img {
        transform: scale(1.05);
    }

    .poster-tag {
        position: absolute;
        top: 10px;
        left: 10px;
        background: rgba(0,0,0,0.7);
        backdrop-filter: blur(4px);
        padding: 4px 10px;
        border-radius: 20px;
        font-size: 12px;
        color: #fff;
    }

    .poster-info {
        padding: 16px;
    }

    .poster-info h3 {
        font-size: 16px;
        margin-bottom: 6px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .poster-info p {
        font-size: 13px;
        color: var(--text-sub);
        margin-bottom: 10px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .poster-meta {
        display: flex;
        justify-content: space-between;
        font-size: 12px;
        color: #666;
    }

    /* Install Steps */
    .install-steps {
        background: var(--gradient-dark);
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
    }

    .steps-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }

    .step-card {
        background: var(--bg-card);
        padding: 30px 20px;
        border-radius: 16px;
        text-align: center;
        position: relative;
        border: 1px solid var(--border-color);
    }

    .step-num {
        width: 40px;
        height: 40px;
        background: var(--gradient-main);
        color: #fff;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: bold;
        font-size: 20px;
        margin: 0 auto 20px;
    }

    .step-card h3 {
        font-size: 18px;
        margin-bottom: 12px;
    }

    .step-card p {
        font-size: 14px;
        color: var(--text-sub);
    }

    /* FAQ */
    .faq-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .faq-item {
        background: var(--bg-card);
        padding: 24px;
        border-radius: 12px;
        border-left: 4px solid var(--primary);
    }

    .faq-item h3 {
        font-size: 18px;
        margin-bottom: 12px;
        color: #fff;
    }

    .faq-item p {
        font-size: 15px;
        color: var(--text-sub);
    }

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

    .comment-card {
        background: var(--bg-card);
        padding: 24px;
        border-radius: 16px;
        display: flex;
        flex-direction: column;
    }

    .user-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 16px;
    }

    .avatar {
        width: 40px;
        height: 40px;
        background: #ff8fa3;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: bold;
        color: #fff;
    }

    .user-name {
        font-size: 15px;
        font-weight: bold;
    }

    .comment-text {
        font-size: 14px;
        color: var(--text-sub);
        line-height: 1.5;
    }

    /* Privacy */
    .privacy-layout {
        display: flex;
        gap: 40px;
        align-items: center;
    }

    .privacy-text {
        flex: 1;
    }

    .privacy-text h2 {
        font-size: 32px;
        margin-bottom: 20px;
    }

    .privacy-text p {
        color: var(--text-sub);
        margin-bottom: 20px;
        font-size: 16px;
    }

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

    .privacy-list li {
        margin-bottom: 16px;
        padding-left: 24px;
        position: relative;
        font-size: 15px;
    }

    .privacy-list li::before {
        content: "✓";
        position: absolute;
        left: 0;
        color: var(--primary);
        font-weight: bold;
    }

    .privacy-img {
        flex: 1;
        border-radius: 16px;
        overflow: hidden;
    }

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

    /* Creator & Community */
    .creator-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }

    .info-box {
        background: var(--bg-card);
        padding: 40px;
        border-radius: 20px;
        border: 1px solid var(--border-color);
    }

    .info-box h2 {
        font-size: 28px;
        margin-bottom: 20px;
    }

    .info-box p {
        color: var(--text-sub);
        margin-bottom: 20px;
    }

    .info-box ul {
        list-style: none;
        margin-bottom: 30px;
    }

    .info-box ul li {
        margin-bottom: 12px;
        font-size: 15px;
        padding-left: 20px;
        position: relative;
    }

    .info-box ul li::before {
        content: "•";
        position: absolute;
        left: 0;
        color: var(--primary);
    }

    /* Footer */
    .site-footer {
        background: #0a0a0f;
        padding: 40px 0;
        border-top: 1px solid var(--border-color);
        text-align: center;
        color: var(--text-sub);
        font-size: 13px;
    }

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

    .footer-content a {
        color: var(--text-sub);
        margin: 0 5px;
    }

    .footer-content a:hover {
        color: var(--primary);
    }

    /* Responsive */
    @media (max-width: 1024px) {
        .hero-inner {
            flex-direction: column;
            text-align: center;
        }
        
        .hero-content p {
            margin: 0 auto 30px;
        }

        .download-group {
            justify-content: center;
        }

        .poster-grid {
            grid-template-columns: repeat(3, 1fr);
        }

        .steps-grid {
            grid-template-columns: repeat(2, 1fr);
        }

        .comment-grid {
            grid-template-columns: repeat(2, 1fr);
        }

        .privacy-layout {
            flex-direction: column;
        }
    }

    @media (max-width: 768px) {
        .nav-links {
            display: none;
            position: absolute;
            top: 64px;
            left: 0;
            width: 100%;
            background: var(--bg-card);
            flex-direction: column;
            padding: 20px;
            gap: 16px;
            border-bottom: 1px solid var(--border-color);
        }

        .nav-links.active {
            display: flex;
        }

        .nav-toggle {
            display: block;
        }

        .hero-content h1 {
            font-size: 32px;
        }

        .poster-grid {
            grid-template-columns: repeat(2, 1fr);
        }

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

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

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

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