/**
 * @since 15-08-03 21:21
 * @author vivaxy
 */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
}

ol {
    counter-reset: ol;
    list-style: none;
}

ol li {
    counter-increment: ol;
}

ol li:before {
    content: '第' counter(ol) '章';
}

ol li ul {
    list-style: none;
}

ol li ul li {
    counter-increment: ul;
}

ol li ul li:before {
    content: '第' counter(ol) '章 第' counter(ul) '个';
}