/* 内联 SVG 图标：线宽 1.5，随 currentColor；直角端点/折角以配合方形控件 */
.site-icon {
    display: block;
    flex-shrink: 0;
    width: 1.25rem;
    height: 1.25rem;
}

.site-icon :is(path, circle, line, polyline, rect) {
    stroke-linecap: square;
    stroke-linejoin: miter;
}

.site-icon--xs {
    width: 0.875rem;
    height: 0.875rem;
}

.site-icon--sm {
    width: 1rem;
    height: 1rem;
}

.site-icon--md {
    width: 1.125rem;
    height: 1.125rem;
}

.site-icon--lg {
    width: 1.5rem;
    height: 1.5rem;
}

.site-icon--inherit {
    width: 1em;
    height: 1em;
}

/* 顶栏搜索 / 菜单按钮内图标尺寸 */
.site-header--academic .site-header__search-btn .site-icon,
.site-header--academic .site-header__mobile-search-btn .site-icon {
    width: 1.375rem;
    height: 1.375rem;
}

.site-header--academic .site-header__menu-btn .site-icon {
    width: 1.25rem;
    height: 1.25rem;
}

/* 首页顶区横滑箭头（深色底上的浅色描边） */
.bilibili-news-arrow .site-icon {
    width: 1.125rem;
    height: 1.125rem;
}

@media (min-width: 640px) {
    .bilibili-news-arrow .site-icon {
        width: 1.25rem;
        height: 1.25rem;
    }
}