/* Case Study 02 — AI rà soát SOP an toàn.
   Nội dung được tách theo chín bước để giữ nguyên văn và bảo đảm dễ đọc khi trình chiếu. */
.v5 .sop-case-slide {
  padding: 56px 104px 104px;
  overflow: hidden;
  color: #f4f9fa;
  background:
    radial-gradient(circle at 82% 24%, rgba(34, 185, 197, .13), transparent 31%),
    radial-gradient(circle at 16% 84%, rgba(255, 174, 62, .08), transparent 27%),
    linear-gradient(132deg, #03111b 0%, #071e2c 54%, #04121c 100%);
}
.v5 .sop-case-slide::before {
  z-index: 0;
  opacity: .44;
  background:
    linear-gradient(rgba(112, 215, 221, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(112, 215, 221, .035) 1px, transparent 1px);
  background-size: 78px 78px;
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 97%);
  mask-image: linear-gradient(180deg, #000, transparent 97%);
}
.v5 .sop-case-slide .slide-head { margin-bottom: 15px; }
.v5 .sop-case-slide .section-label { color: #73dfe4; }
.v5 .sop-case-slide .chapter-code { color: #77929d; }
.v5 .sop-stage {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  align-items: center;
  min-height: 52px;
  margin-bottom: 20px;
  border-top: 1px solid rgba(112, 216, 222, .32);
  border-bottom: 1px solid rgba(112, 216, 222, .18);
}
.v5 .sop-stage b { color: #69dce2; font-size: 30px; font-weight: 950; letter-spacing: -.04em; }
.v5 .sop-stage span { color: #d9eef0; font-size: 15px; font-weight: 940; letter-spacing: .16em; }
.v5 .sop-stage em { color: #ffb548; font-size: 14px; font-style: normal; font-weight: 930; letter-spacing: .12em; }
.v5 .sop-main-title {
  max-width: 1640px;
  margin: 0;
  color: #fff;
  font-size: 60px;
  font-weight: 950;
  line-height: 1.02;
  letter-spacing: -.045em;
}
.v5 .sop-lead { margin: 18px 0 0; color: #b9cfd5; font-size: 27px; font-weight: 680; line-height: 1.35; }
.v5 .sop-core-thesis,
.v5 .sop-bottom-rule,
.v5 .sop-safety-note,
.v5 .sop-demo-test,
.v5 .sop-timing {
  border-left: 7px solid #ffb548;
  background: linear-gradient(90deg, rgba(255, 181, 72, .12), rgba(255, 181, 72, .015));
}
.v5 .sop-core-thesis {
  max-width: 1640px;
  margin: 18px 0 26px;
  padding: 17px 24px;
  color: #ffca76;
  font-size: 28px;
  font-weight: 850;
  line-height: 1.34;
}

/* Bước 1 — tình huống và yêu cầu quản lý. */
.v5 .sop-intro-grid {
  display: grid;
  grid-template-columns: .96fr 1.04fr;
  min-height: 460px;
  border-top: 1px solid rgba(111, 218, 224, .24);
  border-bottom: 1px solid rgba(111, 218, 224, .18);
}
.v5 .sop-intro-grid > section { padding: 30px 46px 26px 0; }
.v5 .sop-intro-grid > section + section { padding-right: 0; padding-left: 46px; border-left: 1px solid rgba(111, 218, 224, .2); }
.v5 .sop-intro-grid h3 {
  margin: 0 0 20px;
  color: #70dce2;
  font-size: 22px;
  font-weight: 950;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.v5 .sop-intro-grid p,
.v5 .sop-intro-grid blockquote {
  margin: 0;
  color: #e8f2f4;
  font-size: 30px;
  font-weight: 690;
  line-height: 1.42;
  letter-spacing: -.012em;
}
.v5 .sop-intro-grid blockquote { padding-left: 24px; border-left: 6px solid #69dce2; color: #fff; font-weight: 760; }
.v5 .sop-intro-grid strong {
  display: block;
  margin-top: 27px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 181, 72, .34);
  color: #ffbd57;
  font-size: 27px;
  font-weight: 930;
  line-height: 1.28;
}

/* Các danh sách nội dung lớn. */
.v5 .sop-large-list,
.v5 .sop-approval-list,
.v5 .sop-discussion-list { margin: 25px 0 0; padding: 0; list-style: none; }
.v5 .sop-large-list li {
  display: grid;
  grid-template-columns: 68px 1fr;
  align-items: center;
  min-height: 126px;
  border-top: 1px solid rgba(111, 218, 224, .18);
}
.v5 .sop-large-list li b,
.v5 .sop-approval-list li b,
.v5 .sop-discussion-list li b { color: #69dce2; font-size: 28px; font-weight: 950; }
.v5 .sop-large-list li span { color: #e0ecef; font-size: 28px; font-weight: 710; line-height: 1.34; }
.v5 .sop-large-list li.is-warning { border-left: 6px solid #ffb548; background: linear-gradient(90deg, rgba(255, 181, 72, .1), transparent 78%); }
.v5 .sop-large-list li.is-warning b { padding-left: 18px; color: #ffb548; }
.v5 .sop-gap-list { display: grid; grid-template-columns: 1fr 1fr; column-gap: 48px; }
.v5 .sop-gap-list li { min-height: 145px; }
.v5 .sop-bottom-rule { margin: 24px 0 0; padding: 18px 24px; color: #ffca76; font-size: 25px; font-weight: 880; line-height: 1.32; }

/* Bước 3 — nguồn SOP giả lập. */
.v5 .sop-safety-note { margin: 17px 0 15px; padding: 13px 20px; color: #ffca76; font-size: 21px; font-weight: 790; line-height: 1.3; }
.v5 .sop-document-name { margin: 0 0 13px; color: #bcd0d6; font-size: 23px; font-weight: 680; }
.v5 .sop-document-name strong { color: #fff; font-weight: 900; }
.v5 .sop-document-name-cont { margin-top: 24px; font-size: 27px; }
.v5 .sop-source-table,
.v5 .sop-classify-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  border-top: 1px solid rgba(111, 218, 224, .3);
  border-bottom: 1px solid rgba(111, 218, 224, .22);
}
.v5 .sop-source-table th,
.v5 .sop-classify-table th {
  padding: 13px 18px;
  color: #74dfe4;
  background: rgba(10, 43, 56, .72);
  font-size: 17px;
  font-weight: 950;
  letter-spacing: .08em;
  text-align: left;
  text-transform: uppercase;
}
.v5 .sop-source-table th:first-child { width: 28%; }
.v5 .sop-source-table td {
  height: 96px;
  padding: 12px 20px;
  border-top: 1px solid rgba(111, 218, 224, .14);
  color: #deebee;
  font-size: 28px;
  font-weight: 690;
  line-height: 1.25;
}
.v5 .sop-source-table td:first-child { color: #fff; font-weight: 900; }
.v5 .sop-source-table-cont { margin-top: 28px; }
.v5 .sop-source-table-cont td { height: 132px; font-size: 30px; }

/* Bước 5 — Dock Đỏ, Vàng, Xanh. */
.v5 .sop-classify-table { margin-top: 28px; }
.v5 .sop-classify-table th:nth-child(1) { width: 36%; }
.v5 .sop-classify-table th:nth-child(2) { width: 22%; }
.v5 .sop-classify-table th:nth-child(3) { width: 42%; }
.v5 .sop-classify-table td {
  height: 154px;
  padding: 20px 24px;
  border-top: 1px solid rgba(111, 218, 224, .15);
  color: #e6eff1;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.32;
  vertical-align: middle;
}
.v5 .sop-classify-table td:nth-child(2) { font-size: 27px; font-weight: 950; }
.v5 .sop-classify-table tr { --dock: #69dce2; }
.v5 .sop-classify-table tr.dock-green { --dock: #69dfa9; }
.v5 .sop-classify-table tr.dock-yellow { --dock: #ffbf55; }
.v5 .sop-classify-table tr.dock-red { --dock: #ff6973; }
.v5 .sop-classify-table tr.dock-mixed { --dock: #ff8f5a; }
.v5 .sop-classify-table tr td:first-child { border-left: 8px solid var(--dock); }
.v5 .sop-classify-table tr td:nth-child(2) { color: var(--dock); }
.v5 .sop-classify-table-cont { margin-top: 40px; }

/* Bước 6 — prompt an toàn. */
.v5 .sop-prompt-console {
  margin-top: 23px;
  border: 1px solid rgba(112, 216, 222, .3);
  background: rgba(2, 14, 22, .78);
  box-shadow: inset 0 0 80px rgba(34, 185, 197, .035);
}
.v5 .sop-prompt-role { margin: 0; padding: 20px 28px; border-bottom: 1px solid rgba(112, 216, 222, .22); color: #fff; font-size: 31px; font-weight: 870; }
.v5 .sop-prompt-columns { display: grid; grid-template-columns: 1fr 1fr; }
.v5 .sop-prompt-columns > section { min-height: 520px; padding: 26px 34px 25px; }
.v5 .sop-prompt-columns > section + section { border-left: 1px solid rgba(112, 216, 222, .2); }
.v5 .sop-prompt-columns h3 { margin: 0 0 16px; color: #72dce2; font-size: 23px; font-weight: 950; letter-spacing: .06em; }
.v5 .sop-prompt-columns :is(ul, ol) { margin: 0; padding-left: 29px; }
.v5 .sop-prompt-columns li {
  margin: 0;
  padding: 10px 0 13px 10px;
  border-bottom: 1px solid rgba(112, 216, 222, .12);
  color: #e3eef0;
  font-size: 28px;
  font-weight: 690;
  line-height: 1.34;
}
.v5 .sop-prompt-console-cont .sop-prompt-columns > section { min-height: 490px; }
.v5 .sop-output-list { list-style: none; padding-left: 0 !important; }
.v5 .sop-output-list li { padding-left: 0; }
.v5 .sop-output-list b { display: inline-block; width: 36px; color: #ffb548; }

/* Bước 7 — ba vòng demo. */
.v5 .sop-demo-flow {
  display: grid;
  grid-template-columns: 1fr 1fr 1.4fr;
  margin-top: 46px;
  border-top: 1px solid rgba(112, 216, 222, .28);
  border-bottom: 1px solid rgba(112, 216, 222, .22);
}
.v5 .sop-demo-flow article { min-height: 335px; padding: 36px 40px; }
.v5 .sop-demo-flow article + article { border-left: 1px solid rgba(112, 216, 222, .2); }
.v5 .sop-demo-flow b { display: block; color: #69dce2; font-size: 78px; font-weight: 950; line-height: 1; }
.v5 .sop-demo-flow p { margin: 35px 0 0; color: #f0f6f7; font-size: 30px; font-weight: 780; line-height: 1.34; }
.v5 .sop-demo-test { margin: 35px 0 0; padding: 22px 28px; color: #ffca76; font-size: 29px; font-weight: 900; line-height: 1.34; }
.v5 .sop-danger-quote {
  margin: 24px 0 20px;
  padding: 28px 34px;
  border-left: 8px solid #ff6973;
  color: #fff;
  background: linear-gradient(90deg, rgba(255, 105, 115, .13), rgba(255, 105, 115, .02));
  font-size: 31px;
  font-weight: 800;
  line-height: 1.38;
}
.v5 .sop-explain { margin: 0; color: #c6d8dd; font-size: 27px; font-weight: 690; line-height: 1.35; }
.v5 .sop-answer-list {
  display: grid;
  grid-template-columns: 1fr 1fr 1.35fr;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(112, 216, 222, .24);
  border-bottom: 1px solid rgba(112, 216, 222, .2);
}
.v5 .sop-answer-list li { min-height: 180px; padding: 30px 34px; color: #e4eef0; font-size: 28px; font-weight: 760; line-height: 1.34; }
.v5 .sop-answer-list li + li { border-left: 1px solid rgba(112, 216, 222, .18); }
.v5 .sop-discussion-title { margin: 26px 0 0; color: #72dce2; font-size: 24px; font-weight: 950; letter-spacing: .05em; }
.v5 .sop-discussion-list {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  border-top: 1px solid rgba(112, 216, 222, .24);
  border-bottom: 1px solid rgba(112, 216, 222, .18);
}
.v5 .sop-discussion-list li { display: grid; grid-template-columns: 52px 1fr; align-items: center; min-height: 152px; padding: 12px 30px; }
.v5 .sop-discussion-list li + li { border-left: 1px solid rgba(112, 216, 222, .18); }
.v5 .sop-discussion-list li span { color: #e8f1f3; font-size: 28px; font-weight: 760; line-height: 1.3; }
.v5 .sop-injection-answer-list { margin-top: 50px; }
.v5 .sop-injection-answer-list li { min-height: 180px; }
.v5 .sop-injection-answer-list li span { font-size: 30px; }

/* Bước 8 — checklist Human Approved. */
.v5 .sop-approval-list { display: grid; grid-template-columns: 1fr 1fr; column-gap: 48px; margin-top: 22px; }
.v5 .sop-approval-list li {
  display: grid;
  grid-template-columns: 58px 1fr;
  align-items: center;
  min-height: 142px;
  border-top: 1px solid rgba(112, 216, 222, .18);
}
.v5 .sop-approval-list li:nth-child(n+5) b { color: #ffb548; }
.v5 .sop-approval-list li span { color: #e3edef; font-size: 22px; font-weight: 720; line-height: 1.34; }
.v5 .sop-approval-list-single { display: block; margin-top: 24px; }
.v5 .sop-approval-list-single li { min-height: 142px; }
.v5 .sop-approval-list-single li span { font-size: 29px; }
.v5 .sop-approval-list-cont { margin-top: 48px; }
.v5 .sop-approval-list-cont li b { color: #ffb548; }

/* Bước 9 — kết luận và thời lượng. */
.v5 .sop-closing-slide {
  background:
    radial-gradient(circle at 74% 42%, rgba(255, 181, 72, .16), transparent 34%),
    radial-gradient(circle at 18% 72%, rgba(45, 195, 205, .13), transparent 30%),
    linear-gradient(132deg, #03111b 0%, #071e2c 54%, #04121c 100%);
}
.v5 .sop-closing-quote {
  max-width: 1540px;
  margin: 68px 0 0;
  padding-left: 38px;
  border-left: 10px solid #ffb548;
  color: #fff;
  font-size: 46px;
  font-weight: 860;
  line-height: 1.34;
  letter-spacing: -.022em;
}
.v5 .sop-timing { max-width: 1570px; margin: 74px 0 0; padding: 24px 30px; color: #dce9ec; font-size: 27px; font-weight: 720; line-height: 1.4; }

/* Nhịp xuất hiện: ưu tiên nội dung, không phô diễn. */
.v5 .sop-case-slide.active :is(
  .sop-stage, .sop-main-title, .sop-core-thesis, .sop-lead, .sop-intro-grid,
  .sop-large-list, .sop-source-table, .sop-classify-table, .sop-prompt-console,
  .sop-demo-flow, .sop-danger-quote, .sop-discussion-list, .sop-approval-list,
  .sop-closing-quote
) { animation: sopCaseRise .7s cubic-bezier(.16, .86, .22, 1) both; }
.v5 .sop-case-slide.active :is(
  .sop-core-thesis, .sop-lead, .sop-intro-grid, .sop-large-list,
  .sop-source-table, .sop-classify-table, .sop-prompt-console, .sop-demo-flow,
  .sop-danger-quote, .sop-discussion-list, .sop-approval-list, .sop-closing-quote
) { animation-delay: .16s; }
.v5 .sop-case-slide.active :is(.sop-bottom-rule, .sop-demo-test, .sop-answer-list, .sop-timing) {
  animation: sopCaseRise .65s .34s cubic-bezier(.16, .86, .22, 1) both;
}
@keyframes sopCaseRise {
  from { opacity: 0; transform: translate3d(0, 24px, 0); }
  to { opacity: 1; transform: translate3d(0, 0, 0); }
}
@media (prefers-reduced-motion: reduce) {
  .v5 .sop-case-slide.active * { animation: none !important; transform: none !important; }
}

/* --------------------------------------------------------------------------
   Bản giảng viên 6 slide — câu hỏi hiển thị trước, đáp án chỉ mở khi bấm.
   -------------------------------------------------------------------------- */
.v5 .sop-smart-slide { padding: 56px 104px 104px; }
.v5 .sop-smart-slide .slide-head { margin-bottom: 14px; }
.v5 .sop-smart-step {
  display: grid;
  grid-template-columns: 66px 1fr auto;
  align-items: center;
  min-height: 48px;
  margin-bottom: 18px;
  border-top: 1px solid rgba(112, 216, 222, .3);
  border-bottom: 1px solid rgba(112, 216, 222, .17);
}
.v5 .sop-smart-step b { color: #69dce2; font-size: 29px; font-weight: 950; }
.v5 .sop-smart-step span { color: #cde4e8; font-size: 15px; font-weight: 940; letter-spacing: .14em; }
.v5 .sop-smart-step em { color: #ffb548; font-size: 14px; font-style: normal; font-weight: 940; letter-spacing: .12em; }
.v5 .sop-smart-slide > h2 {
  max-width: 1640px;
  margin: 0;
  color: #fff;
  font-size: 60px;
  font-weight: 950;
  line-height: 1.02;
  letter-spacing: -.045em;
}
.v5 .sop-smart-slide > h2 span { color: #69dce2; }
.v5 .sop-smart-thesis {
  margin: 20px 0 24px;
  padding: 17px 24px;
  border-left: 7px solid #ffb548;
  color: #ffca76;
  background: linear-gradient(90deg, rgba(255, 181, 72, .12), transparent 85%);
  font-size: 28px;
  font-weight: 850;
  line-height: 1.34;
}

/* Slide 1 / 6. */
.v5 .sop-smart-intro-grid {
  display: grid;
  grid-template-columns: .88fr 1.12fr;
  min-height: 385px;
  border-top: 1px solid rgba(112, 216, 222, .22);
  border-bottom: 1px solid rgba(112, 216, 222, .18);
}
.v5 .sop-smart-intro-grid section { padding: 30px 45px 24px 0; }
.v5 .sop-smart-intro-grid section + section { padding-right: 0; padding-left: 45px; border-left: 1px solid rgba(112, 216, 222, .18); }
.v5 .sop-smart-intro-grid small,
.v5 .sop-review-brief-smart small {
  color: #72dce2;
  font-size: 16px;
  font-weight: 950;
  letter-spacing: .14em;
}
.v5 .sop-smart-intro-grid p,
.v5 .sop-smart-intro-grid blockquote {
  margin: 22px 0 0;
  color: #e7f0f2;
  font-size: 28px;
  font-weight: 720;
  line-height: 1.42;
}
.v5 .sop-smart-intro-grid blockquote { padding-left: 24px; border-left: 6px solid #69dce2; color: #fff; }
.v5 .sop-smart-rails {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  min-height: 72px;
  margin-top: 24px;
  border-top: 1px solid rgba(255, 181, 72, .3);
  border-bottom: 1px solid rgba(255, 181, 72, .2);
  background: rgba(69, 45, 10, .2);
}
.v5 .sop-smart-rails span { color: #b9cdd3; font-size: 17px; font-weight: 900; letter-spacing: .07em; }
.v5 .sop-smart-rails i { color: #6b8d98; font-size: 25px; font-style: normal; }
.v5 .sop-smart-rails strong { color: #ffc15b; font-size: 20px; font-weight: 950; letter-spacing: .07em; }

/* Slide 2 / 6. */
.v5 .sop-smart-caution {
  margin: 18px 0 22px;
  padding: 14px 20px;
  border-left: 7px solid #ffb548;
  color: #ffca76;
  background: linear-gradient(90deg, rgba(255, 181, 72, .11), transparent 86%);
  font-size: 22px;
  font-weight: 800;
  line-height: 1.3;
}
.v5 .sop-source-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid rgba(112, 216, 222, .25);
  border-bottom: 1px solid rgba(112, 216, 222, .18);
}
.v5 .sop-source-flow article {
  min-height: 188px;
  padding: 25px 28px 22px;
  border-right: 1px solid rgba(112, 216, 222, .16);
  border-bottom: 1px solid rgba(112, 216, 222, .16);
}
.v5 .sop-source-flow article:nth-child(4n) { border-right: 0; }
.v5 .sop-source-flow article:nth-child(n+5) { border-bottom: 0; }
.v5 .sop-source-flow b { color: #69dce2; font-size: 35px; font-weight: 950; }
.v5 .sop-source-flow small { display: block; margin-top: 8px; color: #99b6bf; font-size: 14px; font-weight: 950; letter-spacing: .09em; }
.v5 .sop-source-flow p { margin: 15px 0 0; color: #edf4f5; font-size: 23px; font-weight: 730; line-height: 1.3; }

/* Slide 21 — một sân khấu, ba nhịp Space: nhiệm vụ → khoanh vùng → đáp án trong đề. */
.v5 .sop-source-lab > h2 { font-size: 55px; }
.v5 .sop-source-lab-layout {
  display: grid;
  grid-template-columns: 1.32fr .68fr;
  gap: 22px;
  height: 650px;
  margin-top: 22px;
}
.v5 .sop-source-sheet,
.v5 .sop-source-workbench {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(112, 216, 222, .25);
  background: linear-gradient(145deg, rgba(4, 25, 36, .96), rgba(3, 16, 25, .94));
}
.v5 .sop-source-sheet { border-left: 7px solid #69dce2; }
.v5 .sop-source-sheet > header,
.v5 .sop-prompt-script > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 55px;
  padding: 0 22px;
  border-bottom: 1px solid rgba(112, 216, 222, .2);
  background: rgba(5, 38, 48, .72);
}
.v5 .sop-source-sheet > header span,
.v5 .sop-prompt-script > header span { color: #a9c8cf; font-size: 14px; font-weight: 950; letter-spacing: .12em; }
.v5 .sop-source-sheet > header strong,
.v5 .sop-prompt-script > header strong { color: #ffbf55; font-size: 15px; font-weight: 950; letter-spacing: .12em; }
.v5 .sop-source-sheet ol { margin: 0; padding: 0; list-style: none; }
.v5 .sop-source-sheet li {
  position: relative;
  display: grid;
  grid-template-columns: 54px 1fr;
  align-items: center;
  min-height: 84px;
  padding: 8px 18px 8px 15px;
  border-bottom: 1px solid rgba(112, 216, 222, .13);
  transition: background .32s ease, border-color .32s ease;
}
.v5 .sop-source-sheet li:last-child { border-bottom: 0; }
.v5 .sop-source-sheet li > b { color: #69dce2; font-size: 24px; font-weight: 950; }
.v5 .sop-source-sheet li small { display: block; color: #88aab3; font-size: 11px; font-weight: 950; letter-spacing: .11em; }
.v5 .sop-source-sheet li p {
  max-width: 56%;
  margin: 5px 0 0;
  color: #eef5f6;
  font-size: 19px;
  font-weight: 760;
  line-height: 1.22;
}
.v5 .sop-source-sheet mark {
  position: absolute;
  top: 50%;
  right: 16px;
  width: 39%;
  padding: 9px 12px;
  border-left: 5px solid #ffb548;
  color: #ffd58e;
  background: rgba(92, 58, 13, .31);
  font-size: 16px;
  font-weight: 900;
  line-height: 1.22;
  opacity: 0;
  transform: translate(22px, -50%);
  transition: opacity .38s ease, transform .48s cubic-bezier(.16, .86, .22, 1);
}
.v5 .sop-source-lab:has(.sop-answer-trigger.revealed) .sop-source-sheet li:has(mark) { background: linear-gradient(90deg, rgba(255, 181, 72, .035), rgba(255, 181, 72, .12)); }
.v5 .sop-source-lab:has(.sop-answer-trigger.revealed) .sop-source-sheet mark { opacity: 1; transform: translate(0, -50%); }
.v5 .sop-source-lab:has(.sop-answer-trigger.revealed) .sop-source-sheet li:nth-child(3) mark { transition-delay: .06s; }
.v5 .sop-source-lab:has(.sop-answer-trigger.revealed) .sop-source-sheet li:nth-child(4) mark { transition-delay: .12s; }
.v5 .sop-source-lab:has(.sop-answer-trigger.revealed) .sop-source-sheet li:nth-child(5) mark { transition-delay: .18s; }
.v5 .sop-source-lab:has(.sop-answer-trigger.revealed) .sop-source-sheet li:nth-child(6) mark { transition-delay: .24s; }
.v5 .sop-source-lab:has(.sop-answer-trigger.revealed) .sop-source-sheet li:nth-child(7) mark { transition-delay: .30s; }
.v5 .sop-source-workbench {
  display: grid;
  grid-template-rows: 126px 184px 166px 72px;
  gap: 13px;
  padding: 22px;
  border-right: 7px solid rgba(255, 181, 72, .65);
}
.v5 .sop-source-idle,
.v5 .sop-source-mission,
.v5 .sop-source-focus {
  padding: 18px 20px;
  border-top: 1px solid rgba(112, 216, 222, .19);
  background: rgba(5, 35, 45, .46);
}
.v5 .sop-source-idle { display: grid; grid-template-columns: 54px 1fr; align-content: center; }
.v5 .sop-source-idle b { grid-row: span 2; color: #69dce2; font-size: 42px; font-weight: 950; }
.v5 .sop-source-idle span { color: #fff; font-size: 19px; font-weight: 950; letter-spacing: .05em; }
.v5 .sop-source-idle p { grid-column: 2; margin: 8px 0 0; color: #a9c2c9; font-size: 16px; font-weight: 720; line-height: 1.3; }
.v5 .sop-source-workbench small { color: #ffbf55; font-size: 12px; font-weight: 950; letter-spacing: .11em; }
.v5 .sop-source-workbench h3 { margin: 11px 0 0; color: #fff; font-size: 24px; font-weight: 920; line-height: 1.15; }
.v5 .sop-source-workbench section p { margin: 10px 0 0; color: #cfe0e3; font-size: 17px; font-weight: 700; line-height: 1.32; }
.v5 .sop-source-focus { border-top-color: rgba(255, 181, 72, .34); background: rgba(66, 45, 15, .28); }
.v5 .sop-answer-trigger {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 18px;
  border: 1px solid rgba(105, 223, 169, .38);
  background: rgba(10, 71, 54, .36);
}
.v5 .sop-answer-trigger b { color: #69dfa9; font-size: 17px; font-weight: 950; }
.v5 .sop-answer-trigger span { color: #eafff3; font-size: 13px; font-weight: 950; letter-spacing: .06em; line-height: 1.25; }
.v5 .sop-source-space-rail {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  min-height: 54px;
  margin-top: 14px;
  color: #88a8b1;
  font-size: 12px;
  font-weight: 950;
  letter-spacing: .08em;
}
.v5 .sop-source-space-rail i { padding: 7px 10px; border: 1px solid rgba(112, 216, 222, .25); color: #69dce2; font-style: normal; }
.v5 .sop-source-space-rail strong { color: #ffbf55; }

/* Nền tương tác dùng chung. */
.v5 .scenario.sop-reveal-card {
  position: relative;
  display: block;
  width: 100%;
  min-height: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(112, 216, 222, .3);
  border-left: 7px solid #69dce2;
  border-radius: 0;
  color: #f2f7f8;
  background: rgba(3, 17, 26, .8);
  box-shadow: none;
  text-align: left;
  cursor: pointer;
  transition: border-color .22s ease, background .22s ease, transform .22s ease;
}
.v5 .scenario.sop-reveal-card:hover { transform: translateY(-3px); border-color: rgba(255, 191, 85, .72); }
.v5 .scenario.sop-reveal-card:focus-visible { outline: 4px solid rgba(105, 220, 226, .72); outline-offset: 4px; }
.v5 .sop-reveal-answer,
.v5 .sop-item-answer,
.v5 .sop-demo-answer {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(18px);
  transition: opacity .28s ease, transform .28s ease, visibility .28s ease;
}
.v5 .sop-reveal-card.revealed :is(.sop-reveal-answer, .sop-item-answer, .sop-demo-answer) {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.v5 .sop-reveal-card.revealed :is(.sop-reveal-prompt, .sop-item-question, .sop-demo-question) { opacity: 0; visibility: hidden; }

/* Slide 3 / 6. */
.v5 .sop-review-brief-smart {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-top: 24px;
  border-top: 1px solid rgba(112, 216, 222, .22);
  border-bottom: 1px solid rgba(112, 216, 222, .18);
}
.v5 .sop-review-brief-smart section { min-height: 198px; padding: 25px 36px 23px 0; }
.v5 .sop-review-brief-smart section + section { padding-right: 0; padding-left: 36px; border-left: 1px solid rgba(112, 216, 222, .18); }
.v5 .sop-review-brief-smart p { margin: 15px 0 0; color: #dce9ec; font-size: 23px; font-weight: 700; line-height: 1.34; }
.v5 .sop-review-brief-smart strong { color: #ffbf55; }
.v5 .sop-review-reveal { height: 310px; margin-top: 25px !important; }
.v5 .sop-reveal-prompt {
  display: grid;
  grid-template-columns: 95px 1fr auto;
  align-items: center;
  height: 100%;
  padding: 0 42px;
  transition: opacity .2s ease, visibility .2s ease;
}
.v5 .sop-reveal-prompt > b { color: #69dce2; font-size: 104px; font-weight: 950; line-height: 1; }
.v5 .sop-reveal-prompt > strong { color: #fff; font-size: 31px; font-weight: 950; letter-spacing: .04em; }
.v5 .sop-reveal-prompt > span { color: #ffbf55; font-size: 19px; font-weight: 900; letter-spacing: .07em; }
.v5 .sop-gap-answer {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: stretch;
  padding: 18px 22px;
  background: linear-gradient(135deg, rgba(5, 40, 50, .98), rgba(4, 21, 31, .98));
}
.v5 .sop-gap-answer span {
  display: flex;
  align-items: center;
  padding: 18px 24px;
  border-right: 1px solid rgba(112, 216, 222, .17);
  border-bottom: 1px solid rgba(112, 216, 222, .17);
  color: #eaf3f4;
  font-size: 26px;
  font-weight: 790;
  line-height: 1.28;
}
.v5 .sop-gap-answer span:nth-child(3n) { border-right: 0; }
.v5 .sop-gap-answer span:nth-child(n+4) { border-bottom: 0; }

/* Slide 22 — prompt tiếp nối trực tiếp từ các khoảng trống vừa tìm thấy. */
.v5 .sop-prompt-builder-layout {
  display: grid;
  grid-template-columns: 1.35fr .65fr;
  gap: 24px;
  height: 600px;
  margin-top: 30px;
}
.v5 .sop-prompt-script,
.v5 .sop-prompt-guardrails {
  overflow: hidden;
  border: 1px solid rgba(112, 216, 222, .26);
  background: linear-gradient(145deg, rgba(5, 29, 40, .96), rgba(3, 17, 26, .94));
}
.v5 .sop-prompt-script { border-left: 7px solid #69dce2; }
.v5 .sop-prompt-script > p {
  display: grid;
  grid-template-columns: 150px 1fr;
  align-items: center;
  min-height: 116px;
  margin: 0;
  padding: 17px 26px;
  border-bottom: 1px solid rgba(112, 216, 222, .14);
  color: #e5eef0;
  font-size: 22px;
  font-weight: 720;
  line-height: 1.34;
}
.v5 .sop-prompt-script > p:last-child { border-bottom: 0; }
.v5 .sop-prompt-script > p > b { color: #72dce2; font-size: 15px; font-weight: 950; letter-spacing: .09em; text-transform: uppercase; }
.v5 .sop-prompt-script .sop-prompt-critical { background: linear-gradient(90deg, rgba(255, 181, 72, .1), transparent); }
.v5 .sop-prompt-script .sop-prompt-critical > b,
.v5 .sop-prompt-script .sop-prompt-critical strong { color: #ffbf55; }
.v5 .sop-prompt-guardrails { padding: 27px 28px; border-right: 7px solid rgba(255, 181, 72, .68); }
.v5 .sop-prompt-guardrails > small { color: #ffbf55; font-size: 15px; font-weight: 950; letter-spacing: .12em; }
.v5 .sop-prompt-guardrails ol { margin: 20px 0 0; padding: 0; list-style: none; }
.v5 .sop-prompt-guardrails li {
  display: grid;
  grid-template-columns: 48px 1fr;
  align-items: center;
  min-height: 112px;
  border-top: 1px solid rgba(112, 216, 222, .16);
}
.v5 .sop-prompt-guardrails li b { color: #69dce2; font-size: 23px; font-weight: 950; }
.v5 .sop-prompt-guardrails li span { color: #eef5f6; font-size: 21px; font-weight: 790; line-height: 1.28; }
.v5 .sop-prompt-gate {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  min-height: 58px;
  margin-top: 18px;
  border-top: 1px solid rgba(255, 181, 72, .26);
  border-bottom: 1px solid rgba(255, 181, 72, .18);
  background: rgba(72, 48, 12, .2);
}
.v5 .sop-prompt-gate span { color: #a9c1c7; font-size: 16px; font-weight: 900; letter-spacing: .06em; }
.v5 .sop-prompt-gate i { color: #69dce2; font-size: 23px; font-style: normal; }
.v5 .sop-prompt-gate strong { color: #ffbf55; font-size: 18px; font-weight: 950; letter-spacing: .06em; }

/* Slide 4 / 6. */
.v5 .sop-classify-smart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 29px;
}
.v5 .sop-classify-item { height: 184px; }
.v5 .sop-item-question,
.v5 .sop-item-answer {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 30px;
  transition: opacity .2s ease, visibility .2s ease;
}
.v5 .sop-item-question { color: #f0f5f6; font-size: 26px; font-weight: 800; line-height: 1.28; }
.v5 .sop-item-question::after { content: "NHẤN ĐỂ KIỂM TRA"; margin-left: auto; padding-left: 22px; color: #789aa4; font-size: 12px; font-weight: 950; letter-spacing: .1em; }
.v5 .sop-item-answer { gap: 25px; background: rgba(5, 29, 39, .98); }
.v5 .sop-item-answer b { flex: 0 0 145px; color: var(--tone); font-size: 30px; font-weight: 950; }
.v5 .sop-item-answer span { color: #e2edef; font-size: 25px; font-weight: 750; line-height: 1.3; }
.v5 .sop-classify-item[data-tone="green"] { --tone: #69dfa9; }
.v5 .sop-classify-item[data-tone="yellow"] { --tone: #ffbf55; }
.v5 .sop-classify-item[data-tone="red"] { --tone: #ff6973; }
.v5 .sop-classify-item[data-tone="mixed"] { --tone: #ff925d; }
.v5 .sop-classify-item.revealed { border-left-color: var(--tone); }

/* Slide 5 / 6. */
.v5 .sop-demo-smart-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 36px;
}
.v5 .sop-demo-card { height: 570px; }
.v5 .sop-demo-question,
.v5 .sop-demo-answer {
  height: 100%;
  padding: 34px 34px 28px;
  transition: opacity .2s ease, visibility .2s ease;
}
.v5 .sop-demo-question b { display: block; color: #69dce2; font-size: 76px; font-weight: 950; line-height: 1; }
.v5 .sop-demo-question small { display: block; margin-top: 20px; color: #ffbf55; font-size: 17px; font-weight: 950; letter-spacing: .1em; }
.v5 .sop-demo-question p { margin: 28px 0 0; color: #e8f1f2; font-size: 25px; font-weight: 760; line-height: 1.36; }
.v5 .sop-demo-question::after { content: "NHẤN ĐỂ MỞ ĐÁP ÁN"; position: absolute; left: 34px; bottom: 28px; color: #7b9ba4; font-size: 13px; font-weight: 950; letter-spacing: .1em; }
.v5 .sop-demo-answer { display: flex; flex-direction: column; justify-content: center; background: linear-gradient(145deg, rgba(6, 46, 55, .99), rgba(4, 22, 31, .99)); }
.v5 .sop-demo-answer strong { color: #69dfa9; font-size: 18px; font-weight: 950; letter-spacing: .13em; }
.v5 .sop-demo-answer p { margin: 26px 0 0; color: #fff; font-size: 29px; font-weight: 820; line-height: 1.38; }

/* Slide 6 / 6. */
.v5 .sop-smart-checklist {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 46px;
  margin: 25px 0 0;
  padding: 0;
  list-style: none;
}
.v5 .sop-smart-checklist li {
  display: grid;
  grid-template-columns: 56px 1fr;
  align-items: center;
  min-height: 118px;
  border-top: 1px solid rgba(112, 216, 222, .17);
}
.v5 .sop-smart-checklist li b { color: #69dce2; font-size: 27px; font-weight: 950; }
.v5 .sop-smart-checklist li:nth-child(n+5) b { color: #ffb548; }
.v5 .sop-smart-checklist li span { color: #e2edef; font-size: 25px; font-weight: 730; line-height: 1.3; }
.v5 .sop-smart-close {
  margin: 25px 0 0;
  padding: 19px 25px;
  border-left: 7px solid #ffb548;
  color: #ffca76;
  background: linear-gradient(90deg, rgba(255, 181, 72, .11), transparent 84%);
  font-size: 27px;
  font-weight: 880;
  line-height: 1.32;
}

.v5 .sop-smart-slide.active :is(.sop-smart-step, h2, .sop-smart-thesis, .sop-smart-intro-grid, .sop-source-flow, .sop-source-lab-layout, .sop-prompt-builder-layout, .sop-review-brief-smart, .sop-classify-smart-grid, .sop-demo-smart-grid, .sop-smart-checklist) {
  animation: sopCaseRise .68s cubic-bezier(.16, .86, .22, 1) both;
}
.v5 .sop-smart-slide.active :is(.sop-smart-intro-grid, .sop-source-flow, .sop-source-lab-layout, .sop-prompt-builder-layout, .sop-review-brief-smart, .sop-classify-smart-grid, .sop-demo-smart-grid, .sop-smart-checklist) { animation-delay: .14s; }

/* --------------------------------------------------------------------------
   Slide 20–23 — hierarchy executive đồng bộ với nhóm rủi ro / kỹ thuật.
   Scope tuyệt đối theo data-outline-slide để không tác động slide khác.
   -------------------------------------------------------------------------- */
.v5 .sop-hierarchy-slide:is(
  [data-outline-slide="20"],
  [data-outline-slide="21"],
  [data-outline-slide="22"],
  [data-outline-slide="23"]
) {
  padding: 48px 104px 94px;
}
.v5 .sop-hierarchy-slide .slide-head { margin-bottom: 10px; }
.v5 .sop-hierarchy-slide .sop-smart-step {
  min-height: 42px;
  margin-bottom: 10px;
}
.v5 .sop-hierarchy-slide .sop-smart-step b { font-size: 27px; }
.v5 .sop-hierarchy-slide .sop-topic-headline {
  max-width: 1660px;
  margin: 0;
  color: #fff;
  font-size: 88px;
  font-weight: 950;
  line-height: .9;
  letter-spacing: -.055em;
  white-space: nowrap;
}
.v5 .sop-hierarchy-slide[data-outline-slide="20"] .sop-topic-headline { font-size: 92px; }
.v5 .sop-hierarchy-slide[data-outline-slide="22"] .sop-topic-headline,
.v5 .sop-hierarchy-slide[data-outline-slide="23"] .sop-topic-headline { font-size: 84px; }
.v5 .sop-hierarchy-slide .sop-topic-subtitle {
  margin: 10px 0 18px;
  color: #75dce2;
  font-size: 30px;
  font-weight: 780;
  line-height: 1.12;
  letter-spacing: -.018em;
}

/* Slide 20 — chủ đề trước, tình huống sau, nguyên tắc chốt ở đáy. */
.v5 .sop-hierarchy-slide[data-outline-slide="20"] .sop-smart-intro-grid {
  min-height: 292px;
}
.v5 .sop-hierarchy-slide[data-outline-slide="20"] .sop-smart-intro-grid section { padding-top: 24px; padding-bottom: 20px; }
.v5 .sop-hierarchy-slide[data-outline-slide="20"] .sop-smart-intro-grid p,
.v5 .sop-hierarchy-slide[data-outline-slide="20"] .sop-smart-intro-grid blockquote {
  margin-top: 16px;
  font-size: 25px;
  line-height: 1.34;
}
.v5 .sop-hierarchy-slide[data-outline-slide="20"] .sop-smart-thesis {
  margin: 16px 0 0;
  padding: 13px 22px;
  font-size: 23px;
  line-height: 1.28;
}
.v5 .sop-hierarchy-slide[data-outline-slide="20"] .sop-smart-rails {
  min-height: 60px;
  margin-top: 12px;
}
.v5 .sop-hierarchy-slide[data-outline-slide="20"] .sop-smart-rails span { font-size: 18px; }
.v5 .sop-hierarchy-slide[data-outline-slide="20"] .sop-smart-rails strong { font-size: 21px; }

/* Slide 21 — giữ ba nhịp Space, tăng cỡ nội dung và thu gọn chiều cao. */
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-lab-layout {
  height: 548px;
  margin-top: 0;
}
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-sheet > header { height: 44px; }
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-sheet li {
  grid-template-columns: 50px 1fr;
  min-height: 72px;
  padding-top: 6px;
  padding-bottom: 6px;
}
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-sheet li p {
  margin-top: 4px;
  font-size: 20px;
  line-height: 1.18;
}
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-sheet mark {
  width: 40%;
  padding: 7px 10px;
  font-size: 18px;
  line-height: 1.16;
}
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-workbench {
  grid-template-rows: 92px 145px 126px 58px;
  gap: 10px;
  padding: 16px;
}
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-idle,
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-mission,
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-focus { padding: 13px 16px; }
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-idle b { font-size: 36px; }
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-idle p,
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-workbench section p { font-size: 18px; line-height: 1.25; }
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-workbench h3 { margin-top: 8px; font-size: 23px; }
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-space-rail {
  min-height: 44px;
  margin-top: 8px;
  gap: 15px;
  font-size: 18px;
}
.v5 .sop-hierarchy-slide[data-outline-slide="21"] .sop-source-space-rail i { padding: 5px 8px; font-size: 14px; }

/* Slide 22 — prompt đủ lớn, headline không cạnh tranh với khung nội dung. */
.v5 .sop-hierarchy-slide[data-outline-slide="22"] .sop-prompt-builder-layout {
  height: 505px;
  margin-top: 0;
}
.v5 .sop-hierarchy-slide[data-outline-slide="22"] .sop-prompt-script > header { height: 47px; }
.v5 .sop-hierarchy-slide[data-outline-slide="22"] .sop-prompt-script > p {
  min-height: 109px;
  padding: 13px 24px;
  font-size: 22px;
  line-height: 1.28;
}
.v5 .sop-hierarchy-slide[data-outline-slide="22"] .sop-prompt-guardrails { padding: 21px 26px; }
.v5 .sop-hierarchy-slide[data-outline-slide="22"] .sop-prompt-guardrails ol { margin-top: 13px; }
.v5 .sop-hierarchy-slide[data-outline-slide="22"] .sop-prompt-guardrails li { min-height: 99px; }
.v5 .sop-hierarchy-slide[data-outline-slide="22"] .sop-prompt-gate {
  min-height: 55px;
  margin-top: 13px;
}
.v5 .sop-hierarchy-slide[data-outline-slide="22"] .sop-prompt-gate span { font-size: 18px; }
.v5 .sop-hierarchy-slide[data-outline-slide="22"] .sop-prompt-gate strong { font-size: 20px; }

/* Slide 23 — tên kỹ thuật là tiêu đề; bài tập giữ cấu trúc hai cột dễ đọc. */
.v5 .sop-hierarchy-slide[data-outline-slide="23"] .sop-classify-smart-grid {
  gap: 13px;
  margin-top: 0;
}
.v5 .sop-hierarchy-slide[data-outline-slide="23"] .sop-classify-item { height: 151px; }
.v5 .sop-hierarchy-slide[data-outline-slide="23"] .sop-item-question { font-size: 25px; }
.v5 .sop-hierarchy-slide[data-outline-slide="23"] .sop-item-question::after { font-size: 13px; }
.v5 .sop-hierarchy-slide[data-outline-slide="23"] .sop-classify-principle {
  margin: 14px 0 0;
  padding: 14px 22px;
  border-left: 7px solid #ffb548;
  color: #ffca76;
  background: linear-gradient(90deg, rgba(255, 181, 72, .11), transparent 84%);
  font-size: 23px;
  font-weight: 850;
  line-height: 1.25;
}

/* Anime.js điều khiển thứ tự vào cảnh cho riêng slide 20–23. */
.v5 .sop-hierarchy-slide.active :is(
  .sop-smart-step,
  .sop-topic-headline,
  .sop-topic-subtitle,
  .sop-hierarchy-visual,
  .sop-hierarchy-principle
) { animation: none !important; }

@media (prefers-reduced-motion: reduce) {
  .v5 .sop-hierarchy-slide :is(.sop-topic-headline,.sop-topic-subtitle,.sop-hierarchy-visual,.sop-hierarchy-principle) {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
  }
}