.asphalt-research-section {
    margin: 40px 0;
    scroll-margin-top: 110px;
}

.asphalt-research-page {
    padding-bottom: 50px;
    text-align: left;
}

.asphalt-research-page h1 {
    line-height: 1.3;
}

.asphalt-research-image {
    display: block;
    width: 100%;
    height: auto;
    margin-bottom: 24px;
}

.asphalt-research-intro {
    margin-bottom: 28px;
}

.asphalt-research-page h2 {
    font-size: 26px;
    line-height: 1.4;
}

.asphalt-research-section h2 {
    margin: 0 0 10px;
    color: #607b9a;
    font: inherit;
    font-weight: 700;
}

.asphalt-research-section .asphalt-research-project summary {
    font: inherit;
    font-weight: 700;
}

.asphalt-research-list {
    margin: 20px 0 28px;
    text-align: left;
}

.asphalt-research-project {
    margin-bottom: 12px;
}

.asphalt-research-project summary {
    display: flex;
    min-height: 60px;
    padding: 16px 20px;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    border-left: 4px solid #e2000f;
    background: #725342;
    color: #fff;
    font-size: 22px;
    line-height: 1.4;
    font-weight: 500;
    cursor: pointer;
    list-style: none;
}

.asphalt-research-project summary::-webkit-details-marker {
    display: none;
}

.asphalt-research-toggle {
    position: relative;
    flex: 0 0 18px;
    height: 18px;
}

.asphalt-research-toggle::before,
.asphalt-research-toggle::after {
    position: absolute;
    content: "";
    background: currentColor;
}

.asphalt-research-toggle::before {
    top: 8px;
    width: 18px;
    height: 2px;
}

.asphalt-research-toggle::after {
    left: 8px;
    width: 2px;
    height: 18px;
}

.asphalt-research-project[open] .asphalt-research-toggle::after {
    display: none;
}

.asphalt-research-project-body {
    padding: 20px 24px;
    border: 1px solid #ddd;
    border-top: 0;
}

.asphalt-research-link,
.asphalt-research-page a {
    display: inline-block;
    color: #b0000c;
}

.asphalt-research-link:hover,
.asphalt-research-page a:hover {
    text-decoration: underline;
}

.asphalt-research-project summary:focus-visible,
.asphalt-research-section a:focus-visible,
.asphalt-research-page a:focus-visible {
    outline: 3px solid #e2000f;
    outline-offset: 3px;
}

.asphalt-research-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 24px;
    font-size: 14px;
}

.asphalt-research-hero {
    margin-bottom: 32px;
}

.asphalt-research-project-name {
    font-size: 20px;
    line-height: 1.5;
    font-weight: 600;
}

.asphalt-research-detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
}

.asphalt-research-copy section {
    margin-bottom: 28px;
}

.asphalt-research-copy ul,
.asphalt-research-facts ul {
    padding-left: 22px;
}

.asphalt-research-copy li,
.asphalt-research-facts li {
    margin-bottom: 8px;
}

.asphalt-research-facts {
    border-left: 1px solid #ddd;
    padding-left: 24px;
}

.asphalt-research-facts dl,
.asphalt-research-facts dd {
    margin: 0;
}

.asphalt-research-facts dt {
    margin: 18px 0 4px;
    font-weight: 600;
}

.asphalt-research-backlinks {
    display: flex;
    flex-wrap: wrap;
    gap: 16px 32px;
    border-top: 1px solid #ddd;
    padding-top: 24px;
}

@media (max-width: 767px) {
    .asphalt-research-page h1 {
        font-size: 32px;
    }

    .asphalt-research-project summary {
        gap: 16px;
        padding: 14px 16px;
        font-size: 18px;
    }

    .asphalt-research-project-body {
        padding: 16px 20px;
    }

    .asphalt-research-detail-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 8px;
    }

    .asphalt-research-facts {
        border-left: 0;
        border-top: 1px solid #ddd;
        padding: 18px 0 28px;
    }
}