/* --- Basic Styles --- */
    :root {
        /* H-Lift Brand Theme */
        --primary-color: #003366; /* Navy Blue */
        --accent-color: #f39c12; /* Safety Orange */
        --bg-light: #f4f7f6;
        --border-color: #e0e0e0;
        --text-dark: #333;
        --text-light: #555;
    }

    body {
        font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        color: var(--text-dark);
        line-height: 1.6;
        margin: 0;
        padding: 20px;
        background-color: #fff;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
    }

    /* --- Header Section --- */
    .page-header {
        border-bottom: 4px solid var(--primary-color);
        padding-bottom: 20px;
        margin-bottom: 40px;
    }

    .page-header h1 {
        color: var(--primary-color);
        font-size: 32px;
        margin: 0 0 10px 0;
    }

    /* --- Content Grid --- */
    .content-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 40px;
        margin-bottom: 50px;
    }

    @media (min-width: 992px) {
        .content-grid {
            grid-template-columns: 3fr 2fr; /* Text content on left, Guide on right */
        }
    }

    /* --- Introduction --- */
    .intro-box {
        font-size: 16px;
        margin-bottom: 30px;
        text-align: justify;
        color: var(--text-light);
    }

    /* --- Features Section --- */
    .features-section h2 {
        color: var(--primary-color);
        font-size: 24px;
        border-left: 5px solid var(--accent-color);
        padding-left: 15px;
        margin-bottom: 20px;
    }

    .component-list {
        list-style: none;
        padding: 0;
        display: grid;
        grid-template-columns: 1fr;
        gap: 15px;
    }

    @media (min-width: 768px) {
        .component-list {
            grid-template-columns: 1fr 1fr; /* 2 columns for features */
        }
    }

    .component-list li {
        background: var(--bg-light);
        padding: 15px;
        border-radius: 6px;
        border: 1px solid var(--border-color);
        font-size: 14px;
    }

    .component-list strong {
        display: block;
        color: var(--primary-color);
        font-size: 16px;
        margin-bottom: 5px;
        border-bottom: 1px solid #ddd;
        padding-bottom: 5px;
    }

    /* --- Selection Guide (Sidebar) --- */
    .guide-box {
        background: #fff;
        border: 2px solid var(--primary-color);
        border-radius: 8px;
        padding: 25px;
        height: fit-content;
        box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    }

    .guide-box h3 {
        margin-top: 0;
        color: var(--primary-color);
        font-size: 22px;
        border-bottom: 1px solid #eee;
        padding-bottom: 10px;
        margin-bottom: 20px;
        text-align: center;
    }

    .guide-list {
        list-style: none;
        padding: 0;
    }

    .guide-list li {
        margin-bottom: 20px;
        position: relative;
        padding-left: 35px;
    }

    .guide-list li::before {
        content: "?";
        background-color: var(--accent-color);
        color: #fff;
        font-weight: bold;
        width: 24px;
        height: 24px;
        border-radius: 50%;
        position: absolute;
        left: 0;
        top: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 14px;
    }

    .guide-list strong {
        color: #333;
        display: block;
        margin-bottom: 5px;
        font-size: 16px;
    }

    .guide-list span {
        font-size: 14px;
        color: #666;
    }