.book-toc > li:nth-child(2),
.book-toc > li:nth-child(3),
.book-toc > li:nth-child(5),
.book-toc > li:nth-child(8),
.book-toc > li:nth-child(9),
.book-toc > li:nth-child(10),
.book-toc > li:nth-child(11),
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.book-toc > li:nth-child(14),
.book-toc > li:nth-child(15),
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.book-toc > li:nth-child(17),
.book-toc > li:nth-child(18),
.book-toc > li:nth-child(19),
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.book-toc > li:nth-child(22),
.book-toc > li:nth-child(25),
.book-toc > li:nth-child(26),
.book-toc > li:nth-child(27),
.book-toc > li:nth-child(28),
.book-toc > li:nth-child(30),
.book-toc > li:nth-child(31),
.book-toc > li:nth-child(34),
.book-toc > li:nth-child(35),
.book-toc > li:nth-child(37),
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.book-toc > li:nth-child(41),
.book-toc > li:nth-child(42),
.book-toc > li:nth-child(43),
.book-toc > li:nth-child(45),
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.book-toc > li:nth-child(63),
.book-toc > li:nth-child(64),
.book-toc > li:nth-child(67),
.book-toc > li:nth-child(68),
.book-toc > li:nth-child(69),
.book-toc > li:nth-child(71),
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.book-toc > li:nth-child(73),
.book-toc > li:nth-child(75),
.book-toc > li:nth-child(76),
.book-toc > li:nth-child(77),
.book-toc > li:nth-child(78),
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.book-toc > li:nth-child(82),
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.book-toc > li:nth-child(90),
.book-toc > li:nth-child(92),
.book-toc > li:nth-child(95),
.book-toc > li:nth-child(96),
.book-toc > li:nth-child(97),
.book-toc > li:nth-child(98),
.book-toc > li:nth-child(99),
.book-toc > li:nth-child(102),
.book-toc > li:nth-child(104),
.book-toc > li:nth-child(105),
.book-toc > li:nth-child(107),
.book-toc > li:nth-child(108),
.book-toc > li:nth-child(110),
.book-toc > li:nth-child(114),
.book-toc > li:nth-child(119),
.book-toc > li:nth-child(123),
.book-toc > li:nth-child(127) {
  padding-left: 10px;
}
.book-toc > li:nth-child(23),
.book-toc > li:nth-child(24),
.book-toc > li:nth-child(38),
.book-toc > li:nth-child(39),
.book-toc > li:nth-child(46),
.book-toc > li:nth-child(47),
.book-toc > li:nth-child(93),
.book-toc > li:nth-child(94),
.book-toc > li:nth-child(100),
.book-toc > li:nth-child(101),
.book-toc > li:nth-child(111),
.book-toc > li:nth-child(112),
.book-toc > li:nth-child(115),
.book-toc > li:nth-child(116),
.book-toc > li:nth-child(117),
.book-toc > li:nth-child(118),
.book-toc > li:nth-child(120),
.book-toc > li:nth-child(121),
.book-toc > li:nth-child(122),
.book-toc > li:nth-child(124),
.book-toc > li:nth-child(125),
.book-toc > li:nth-child(126),
.book-toc > li:nth-child(128),
.book-toc > li:nth-child(129),
.book-toc > li:nth-child(130),
.book-toc > li:nth-child(131) {
  padding-left: 20px;
}
.book-toc > li:nth-child(7),
.book-toc > li:nth-child(13),
.book-toc > li:nth-child(21),
.book-toc > li:nth-child(29),
.book-toc > li:nth-child(33),
.book-toc > li:nth-child(36),
.book-toc > li:nth-child(44),
.book-toc > li:nth-child(50),
.book-toc > li:nth-child(55),
.book-toc > li:nth-child(66),
.book-toc > li:nth-child(70),
.book-toc > li:nth-child(74),
.book-toc > li:nth-child(81),
.book-toc > li:nth-child(87),
.book-toc > li:nth-child(91),
.book-toc > li:nth-child(103),
.book-toc > li:nth-child(106),
.book-toc > li:nth-child(109),
.book-toc > li:nth-child(113) {
  position: sticky;
  top: 4.3rem;
  background: white;
  text-transform: uppercase;
  font-weight: bold;
  padding-top: 0.5rem;
  z-index: 1;
  padding-bottom: 0.5rem;
  margin-bottom: 0;
}



@media (max-width: 991.98px) {
  .book-toc > li:nth-child(3),
  .book-toc > li:nth-child(15),
  .book-toc > li:nth-child(25) {
    top: unset;
  }
}