:root {
        --bg-color: #0f0f13;
        --text-main: #f0f0f5;
        --text-muted: #a0a0b0;
        --accent-color: #e53935;
        --accent-hover: #c62828;
        --card-bg: #1a1a24;
        --border-color: #2a2a35;
    }

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

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

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

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

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

    /* Header */
    .site-header {
        padding: 15px 0;
        border-bottom: 1px solid var(--border-color);
        position: sticky;
        top: 0;
        background-color: rgba(15, 15, 19, 0.9);
        backdrop-filter: blur(10px);
        z-index: 100;
    }

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

    .brand {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.25rem;
        font-weight: bold;
    }

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

    .download-btn {
        background-color: var(--accent-color);
        color: #fff;
        padding: 10px 20px;
        border-radius: 20px;
        font-weight: bold;
        font-size: 0.95rem;
        transition: background-color 0.3s ease;
    }

    .download-btn:hover {
        background-color: var(--accent-hover);
    }

    /* Hero Section */
    .hero {
        padding: 60px 0;
        text-align: center;
    }

    .hero h1 {
        font-size: 2.5rem;
        margin-bottom: 12px;
        letter-spacing: 1px;
    }

    .hero p {
        color: var(--text-muted);
        font-size: 1.1rem;
        margin-bottom: 30px;
        max-width: 700px;
        margin-left: auto;
        margin-right: auto;
    }

    .hero-img {
        width: 100%;
        max-width: 900px;
        height: auto;
        border-radius: 12px;
        margin: 0 auto;
        box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }

    /* Section Global */
    section {
        padding: 60px 0;
        border-top: 1px solid var(--border-color);
    }

    .section-title {
        font-size: 1.8rem;
        margin-bottom: 10px;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .section-title::before {
        content: "";
        display: inline-block;
        width: 4px;
        height: 24px;
        background-color: var(--accent-color);
        border-radius: 2px;
    }

    .section-subtitle {
        color: var(--text-muted);
        margin-bottom: 40px;
        font-size: 1rem;
    }

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

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

    /* Card */
    .card {
        background-color: var(--card-bg);
        border-radius: 12px;
        overflow: hidden;
        border: 1px solid var(--border-color);
        transition: transform 0.3s ease;
    }

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

    .card-img {
        width: 100%;
        aspect-ratio: 3/4;
        object-fit: cover;
    }

    .card-content {
        padding: 15px;
    }

    .card-title {
        font-size: 1.1rem;
        margin-bottom: 8px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .card-desc {
        font-size: 0.85rem;
        color: var(--text-muted);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    /* Horizontal Scroll list */
    .scroll-row {
        display: flex;
        gap: 20px;
        overflow-x: auto;
        padding-bottom: 15px;
        scrollbar-width: thin;
        scrollbar-color: var(--border-color) transparent;
    }
    
    .scroll-row::-webkit-scrollbar {
        height: 6px;
    }
    .scroll-row::-webkit-scrollbar-thumb {
        background-color: var(--border-color);
        border-radius: 3px;
    }

    .scroll-item {
        min-width: 180px;
        width: 180px;
        flex-shrink: 0;
    }

    /* Auth Section */
    .auth-box {
        display: flex;
        flex-wrap: wrap;
        gap: 40px;
        align-items: center;
        background-color: var(--card-bg);
        padding: 40px;
        border-radius: 16px;
        border: 1px solid var(--border-color);
    }

    .auth-text {
        flex: 1;
        min-width: 280px;
    }

    .auth-text h3 {
        font-size: 1.5rem;
        margin-bottom: 15px;
    }

    .auth-text p {
        color: var(--text-muted);
        margin-bottom: 20px;
    }

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

    .auth-list li {
        margin-bottom: 12px;
        display: flex;
        align-items: flex-start;
        gap: 10px;
    }

    .auth-list li::before {
        content: "✓";
        color: var(--accent-color);
        font-weight: bold;
    }

    .auth-img {
        flex: 0 0 300px;
        border-radius: 12px;
        overflow: hidden;
    }

    /* Footer */
    .site-footer {
        padding: 40px 0 20px;
        border-top: 1px solid var(--border-color);
        text-align: center;
        font-size: 0.85rem;
        color: var(--text-muted);
    }
    
    .site-footer p {
        margin-bottom: 10px;
    }

    .site-footer a {
        color: var(--text-muted);
        transition: color 0.3s;
    }

    .site-footer a:hover {
        color: var(--text-main);
    }

    /* Responsive */
    @media (max-width: 1024px) {
        .hero h1 { font-size: 2rem; }
        .grid-4 { grid-template-columns: repeat(3, 1fr); }
        .auth-box { padding: 30px; }
        .auth-img { flex: 0 0 250px; }
    }

    @media (max-width: 768px) {
        .header-inner { padding: 0 10px; }
        .hero { padding: 40px 0; }
        .hero h1 { font-size: 1.8rem; }
        .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
        .auth-box { flex-direction: column; text-align: center; }
        .auth-text h3 { text-align: center; }
        .auth-list li { justify-content: center; text-align: left; }
        .auth-img { flex: 0 0 auto; width: 100%; max-width: 300px; margin: 0 auto; }
    }

    @media (max-width: 480px) {
        .grid-3, .grid-4 { grid-template-columns: 1fr; }
        .hero h1 { font-size: 1.5rem; }
        .brand { font-size: 1.1rem; }
        .brand img { height: 28px; }
    }