CSS边距未应用于Gtk文本视图

#include <gtk/gtk.h>

int main(int argc, char *argv[]) {
    gtk_init(&argc, &argv);

    GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);

    GtkWidget *text_view = gtk_text_view_new();
    GtkTextBuffer *buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text_view));
    gtk_text_buffer_set_text(buffer, "Hello, World!", -1);

    // 设置边距
    gtk_text_view_set_margin_left(GTK_TEXT_VIEW(text_view), 10);
    gtk_text_view_set_margin_right(GTK_TEXT_VIEW(text_view), 10);
    gtk_text_view_set_margin_top(GTK_TEXT_VIEW(text_view), 10);
    gtk_text_view_set_margin_bottom(GTK_TEXT_VIEW(text_view), 10);

    GtkWidget *scroll = gtk_scrolled_window_new(NULL, NULL);
    gtk_container_add(GTK_CONTAINER(scroll), text_view);

    gtk_container_add(GTK_CONTAINER(window), scroll);

    gtk_widget_show_all(window);

    gtk_main();

    return 0;
}