:root {
        --bg-color: #f7f5f0;
        --text-main: #1a1a1a;
        --text-light: #666;
        --accent-color: #0056b3;
        --card-bg: #ffffff;
        --border-color: #e0e0e0;
    }

    * {
        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;
        -webkit-font-smoothing: antialiased;
    }

    /* Typography */
    h1, h2, h3 {
        font-weight: 700;
        line-height: 1.3;
        margin-bottom: 16px;
    }

    h1 {
        font-size: 2.2rem;
        letter-spacing: -0.5px;
    }

    h2 {
        font-size: 1.6rem;
        position: relative;
        padding-bottom: 8px;
        margin-top: 40px;
    }

    h2::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: 0;
        width: 40px;
        height: 3px;
        background-color: var(--accent-color);
    }

    h3 {
        font-size: 1.2rem;
        color: #222;
    }

    p {
        color: var(--text-light);
        margin-bottom: 16px;
        font-size: 1rem;
    }

    /* Layout */
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }

    section {
        padding: 60px 0;
    }

    /* Header */
    header {
        background-color: var(--card-bg);
        border-bottom: 1px solid var(--border-color);
        position: sticky;
        top: 0;
        z-index: 100;
    }

    .header-inner {
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 70px;
    }

    .brand {
        display: flex;
        align-items: center;
        gap: 12px;
        text-decoration: none;
        color: var(--text-main);
        font-weight: bold;
        font-size: 1.2rem;
    }

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

    .download-btn {
        background-color: var(--accent-color);
        color: #fff;
        padding: 10px 24px;
        border-radius: 24px;
        text-decoration: none;
        font-weight: 600;
        font-size: 0.95rem;
        transition: background-color 0.3s, transform 0.2s;
    }

    .download-btn:hover {
        background-color: #004494;
        transform: translateY(-1px);
    }

    /* Hero Section */
    .hero {
        background: linear-gradient(to bottom, #ffffff, var(--bg-color));
        padding: 80px 0;
        text-align: center;
    }

    .hero h1 {
        max-width: 800px;
        margin: 0 auto 20px auto;
    }

    .hero p {
        font-size: 1.1rem;
        max-width: 600px;
        margin: 0 auto 32px auto;
    }

    .hero-cover {
        width: 100%;
        max-width: 800px;
        height: auto;
        border-radius: 16px;
        box-shadow: 0 12px 32px rgba(0,0,0,0.1);
        margin-top: 40px;
    }

    /* Grid Layouts */
    .grid-2 {
        display: grid;
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .grid-3 {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .grid-4 {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    /* Cards */
    .card {
        background-color: var(--card-bg);
        border-radius: 12px;
        overflow: hidden;
        box-shadow: 0 4px 16px rgba(0,0,0,0.04);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: translateY(-4px);
        box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    }

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

    .card-content {
        padding: 16px;
    }

    .card-content p {
        margin-bottom: 0;
        font-size: 0.9rem;
    }

    /* Feature List */
    .feature-list {
        list-style: none;
        display: grid;
        gap: 20px;
    }

    .feature-item {
        display: flex;
        gap: 16px;
        align-items: flex-start;
    }

    .feature-icon {
        background-color: #e6f0fa;
        color: var(--accent-color);
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: bold;
        flex-shrink: 0;
    }

    /* Image Text Alternate */
    .split-block {
        display: flex;
        flex-direction: column;
        gap: 24px;
        align-items: center;
        margin-bottom: 40px;
    }

    .split-img {
        width: 100%;
        max-width: 400px;
        border-radius: 12px;
        box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    }

    .split-text {
        flex: 1;
    }

    /* Gallery */
    .gallery-scroll {
        display: flex;
        gap: 16px;
        overflow-x: auto;
        padding-bottom: 16px;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
    }

    .gallery-scroll::-webkit-scrollbar {
        height: 6px;
    }
    .gallery-scroll::-webkit-scrollbar-thumb {
        background-color: #ccc;
        border-radius: 3px;
    }

    .gallery-item {
        flex: 0 0 70%;
        scroll-snap-align: start;
        border-radius: 10px;
        overflow: hidden;
    }

    .gallery-item img {
        width: 100%;
        display: block;
        aspect-ratio: 3/4;
        object-fit: cover;
    }

    /* Footer */
    footer {
        background-color: #fff;
        border-top: 1px solid var(--border-color);
        padding: 40px 0;
        text-align: center;
        font-size: 0.85rem;
        color: #999;
    }

    footer p {
        margin-bottom: 8px;
        color: #999;
    }

    footer a {
        color: #999;
        text-decoration: none;
    }

    footer a:hover {
        text-decoration: underline;
    }

    time {
        display: block;
        margin-top: 8px;
    }

    /* Breakpoints */
    @media (min-width: 768px) {
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2rem; }
        .grid-2 { grid-template-columns: repeat(2, 1fr); }
        .grid-3 { grid-template-columns: repeat(3, 1fr); }
        .grid-4 { grid-template-columns: repeat(4, 1fr); }
        .split-block { flex-direction: row; gap: 60px; }
        .split-block:nth-child(even) { flex-direction: row-reverse; }
        .gallery-item { flex: 0 0 30%; }
        section { padding: 80px 0; }
    }

    @media (min-width: 1024px) {
        h1 { font-size: 3.5rem; }
        .grid-2 { gap: 40px; }
        .hero { padding: 100px 0; }
    }