.pmi-container {
    max-width: 900px;
    margin: 48px auto;
    padding: 30px 28px;
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.06);
    color: #23361f;
    line-height: 1.6;
    font-size: 1rem;
}

.pmi-intro {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.pmi-intro p {
    color: #4a5568;
    margin-bottom: 1rem;
}

.pmi-section {
    margin-bottom: 2rem;
}

.pmi-section h2 {
    color: #264822;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.pmi-section p {
    color: #4a5568;
    margin-bottom: 1rem;
}

.pmi-collapsible {
    background-color: #f8f9fa;
    color: #264822;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 1.1rem;
    margin-bottom: 1px;
    border-radius: 6px;
    transition: all 0.3s ease;
    position: relative;
    border: 1px solid #e2e8f0;
}

.pmi-collapsible:after {
    content: '+';
    color: #718096;
    font-weight: bold;
    float: right;
    margin-left: 5px;
}

.pmi-collapsible.active:after {
    content: '-';
}

.pmi-collapsible:hover {
    background-color: #edf2f7;
}

.pmi-collapsible.active {
    background-color: #eaf4e5;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.pmi-content {
    padding: 0 18px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease-out;
    background-color: white;
    border: 1px solid #e2e8f0;
    border-top: none;
    margin-bottom: 1rem;
    border-bottom-left-radius: 6px;
    border-bottom-right-radius: 6px;
}

.pmi-content.active {
    padding: 18px;
    border: 1px solid #e2e8f0;
    border-top: none;
}

.pmi-content ol {
    padding-left: 1.5rem;
    margin: 1rem 0;
}

.pmi-content li {
    margin-bottom: 1rem;
    color: #4a5568;
}

.pmi-content em {
    color: #718096;
    display: block;
    margin-top: 1rem;
    font-style: italic;
}

.pmi-content strong {
    color: #264822;
}