/* 所有样式限定在 .oilgas-module 内，不影响全局 */
.oilgas-module {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    font-family: 'Open Sans', 'Segoe UI', sans-serif;
}

.oilgas-module h2 {
    font-family: 'Open Sans', sans-serif;
    font-weight: 700;
    font-size: 35px;
    margin-bottom: 16px;
    color: #333333;
}

.oilgas-module .section-sub {
    font-family: 'Open Sans', sans-serif;
    font-weight: 400;
    font-size: 16px;
    color: #555555;
    margin-bottom: 32px;
}

.oilgas-module .app-table-wrapper {
    margin-bottom: 60px;
}

.oilgas-module .app-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    border: 1px solid #e2e8f0;
    font-size: 16px;
    color: #555555;
}

.oilgas-module .app-table th,
.oilgas-module .app-table td {
    text-align: left;
    padding: 14px 16px;
    border-bottom: 1px solid #e2e8f0;
    vertical-align: top;
}

.oilgas-module .app-table th {
    background-color: #f1f5f9;
    font-weight: 600;
    color: #333333;
}

.oilgas-module .app-table tr:last-child td {
    border-bottom: none;
}

@media (max-width: 768px) {
    .oilgas-module .app-table thead {
        display: none;
    }
    .oilgas-module .app-table tbody tr {
        display: block;
        margin-bottom: 20px;
        border: 1px solid #e2e8f0;
        border-radius: 12px;
        background: white;
    }
    .oilgas-module .app-table td {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        padding: 12px 16px;
        border-bottom: 1px solid #f0f2f5;
        gap: 12px;
    }
    .oilgas-module .app-table td:last-child {
        border-bottom: none;
    }
    .oilgas-module .app-table td::before {
        content: attr(data-label);
        font-weight: 600;
        width: 40%;
        min-width: 120px;
        color: #333333;
    }
}

.oilgas-module .faq-section {
    margin-top: 40px;
}

.oilgas-module .faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.oilgas-module .faq-item {
    border: 1px solid #e2e8f0;
    border-radius: 20px;
    background: #ffffff;
    overflow: hidden;
    transition: box-shadow 0.2s;
}

.oilgas-module .faq-item:hover {
    box-shadow: 0 8px 20px rgba(0,0,0,0.05);
}

.oilgas-module .faq-question {
    background: #f8fafc;
    padding: 18px 24px;
    cursor: pointer;
    font-weight: 600;
    font-size: 18px;
    color: #333333;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s;
    user-select: none;
}

.oilgas-module .faq-question:hover {
    background: #eef2ff;
}

.oilgas-module .faq-question .indicator {
    font-size: 20px;
    font-weight: 400;
    transition: transform 0.2s;
}

.oilgas-module .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    background: #ffffff;
    border-top: 1px solid transparent;
}

.oilgas-module .faq-answer-inner {
    padding: 20px 24px;
    font-size: 16px;
    line-height: 1.5;
    color: #555555;
}

.oilgas-module .faq-answer-inner p {
    margin-bottom: 12px;
}

.oilgas-module .faq-item.active .faq-question {
    background: #eef2ff;
}

.oilgas-module .faq-item.active .faq-answer {
    max-height: 800px;
    border-top-color: #e2e8f0;
}

.oilgas-module .faq-item.active .indicator {
    transform: rotate(45deg);
}

@media (max-width: 640px) {
    .oilgas-module .faq-question {
        font-size: 16px;
        padding: 14px 20px;
    }
    .oilgas-module .faq-answer-inner {
        padding: 16px 20px;
        font-size: 15px;
    }
}