.detail-page { --detail-accent: #155eef; }
.detail-top-nav { display: flex; gap: 22px; margin-left: auto; }
.detail-top-nav a { color: var(--muted); font-size: .92rem; font-weight: 700; text-decoration: none; }
.detail-top-nav a:hover { color: var(--ink); }

.deep-layout { display: grid; grid-template-columns: 245px minmax(0, 1fr); gap: clamp(40px, 7vw, 90px); padding-block: 58px 90px; }
.deep-sidebar { position: sticky; top: 112px; align-self: start; }
.deep-sidebar h2 { margin-bottom: 24px; font-size: 1.8rem; }
.deep-type-nav { display: grid; gap: 5px; }
.deep-type-button { width: 100%; display: grid; grid-template-columns: 28px 1fr; gap: 10px; align-items: center; min-height: 44px; padding: 8px 10px; border: 0; border-radius: 10px; background: transparent; color: var(--muted); text-align: left; font-weight: 700; cursor: pointer; }
.deep-type-button span { color: var(--type-accent); font-size: .76rem; font-weight: 850; }
.deep-type-button:hover { background: var(--surface-2); color: var(--ink); }
.deep-type-button.active { background: var(--surface); color: var(--ink); box-shadow: inset 3px 0 0 var(--type-accent); }
.present-current { margin: 22px 10px 0; text-align: left; }

.deep-content { min-width: 0; }
.deep-hero { padding: 32px 0 64px; border-bottom: 1px solid var(--line); }
.deep-hero h1 { max-width: 920px; margin-bottom: 22px; font-size: clamp(3.5rem, 8vw, 7rem); }
.deep-hero .lead { max-width: 820px; }
.profile-strip { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 38px; border-block: 1px solid var(--line); }
.profile-item { padding: 17px 18px 17px 0; }
.profile-item + .profile-item { padding-left: 18px; border-left: 1px solid var(--line); }
.profile-item span { display: block; color: var(--muted); font-size: .76rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.profile-item strong { display: block; margin-top: 3px; font-size: .98rem; }
.material-source { margin: 18px 0 0; color: var(--muted); font-size: .88rem; }

.deep-section { display: grid; grid-template-columns: 56px minmax(0, 1fr); gap: 26px; padding-block: 64px; border-bottom: 1px solid var(--line); }
.deep-section > div > h2, .finish-grid h2 { margin-bottom: 28px; font-size: clamp(1.8rem, 4vw, 3rem); }
.section-index { color: var(--detail-accent); font-size: .8rem; font-weight: 900; letter-spacing: .1em; }
.large-checklist { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 30px; margin: 0; padding: 0; list-style: none; }
.large-checklist li { position: relative; padding-left: 25px; }
.large-checklist li::before { content: ""; position: absolute; top: .63em; left: 0; width: 8px; height: 8px; border: 2px solid var(--detail-accent); border-radius: 50%; }

.workflow-list { counter-reset: workflow; }
.workflow-item { position: relative; display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 20px; padding: 0 0 30px; }
.workflow-item:not(:last-child)::after { content: ""; position: absolute; top: 47px; bottom: 6px; left: 23px; width: 1px; background: var(--line); }
.workflow-number { display: grid; place-items: center; width: 47px; height: 47px; border: 1px solid color-mix(in srgb, var(--detail-accent) 38%, var(--line)); border-radius: 50%; color: var(--detail-accent); font-weight: 900; }
.workflow-item h3 { margin-bottom: 5px; font-size: 1.12rem; }
.workflow-item p { margin-bottom: 0; color: var(--muted); }

.deep-structure { border-top: 1px solid var(--line); }
.structure-row { display: grid; grid-template-columns: minmax(140px, .32fr) minmax(0, 1fr); gap: 34px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.structure-row h3 { margin: 0; color: var(--detail-accent); }
.structure-row p { margin-bottom: 9px; }
.structure-row ul { margin: 8px 0 0; padding-left: 20px; color: var(--muted); }
.structure-row .sample { margin-top: 12px; padding-left: 14px; border-left: 3px solid var(--detail-accent); color: var(--ink); font-style: italic; }

.language-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 44px; }
.language-layout .large-checklist { grid-template-columns: 1fr; }
.phrase-list { border-top: 1px solid var(--line); }
.phrase { padding: 17px 0; border-bottom: 1px solid var(--line); }
.phrase span { display: block; margin-bottom: 4px; color: var(--detail-accent); font-size: .78rem; font-weight: 850; letter-spacing: .06em; text-transform: uppercase; }
.phrase p { margin-bottom: 0; }

.worked-example { padding: clamp(24px, 5vw, 42px); border-radius: 20px; background: var(--navy); color: white; }
.worked-example .task-label { color: #8fb2ff; font-size: .78rem; font-weight: 850; letter-spacing: .08em; text-transform: uppercase; }
.worked-example h3 { max-width: 780px; margin: 8px 0 28px; font-size: clamp(1.35rem, 3vw, 2rem); }
.example-plan { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 28px; }
.example-plan div { padding: 16px; border: 1px solid #354564; border-radius: 12px; }
.example-plan span { display: block; color: #8fb2ff; font-size: .76rem; font-weight: 800; text-transform: uppercase; }
.worked-example blockquote { margin: 0; padding: 20px 0 0; border-top: 1px solid #354564; color: #dbe4f5; font-size: 1.06rem; }
.worked-example .example-note { margin: 14px 0 0; color: #93a4c2; font-size: .9rem; }

.finish-grid { grid-column: 2; display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.mistake-list { margin: 0; padding-left: 22px; }
.mistake-list li { padding: 0 0 14px 6px; }
.final-check { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.final-check li { padding: 13px 15px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); }
.final-check li::before { content: "□"; margin-right: 10px; color: var(--detail-accent); font-weight: 900; }
.deep-pagination { display: flex; justify-content: space-between; gap: 12px; padding-top: 40px; }

.detail-presentation .slide-content { padding-block: 20px; }
.detail-presentation .slide-content h2 { font-size: clamp(2.7rem, 6vw, 5.2rem); }
.detail-presentation .slide-content > p { font-size: clamp(1.1rem, 2vw, 1.65rem); }
.detail-presentation .slide-list { margin-top: 26px; }
.detail-presentation .slide-list li { font-size: clamp(.98rem, 1.7vw, 1.25rem); }
.slide-highlight { margin-top: 28px; padding-left: 20px; border-left: 4px solid #8fb2ff; color: white; font-size: clamp(1.1rem, 2vw, 1.55rem); font-weight: 750; }

@media (max-width: 980px) {
  .detail-top-nav { display: none; }
  .deep-layout { grid-template-columns: 1fr; padding-top: 28px; }
  .deep-sidebar { position: static; }
  .deep-sidebar h2 { display: none; }
  .deep-type-nav { grid-template-columns: repeat(4, 1fr); }
  .deep-type-button { grid-template-columns: 1fr; gap: 0; min-height: 62px; }
  .present-current { margin: 16px 0 0; }
  .deep-hero { padding-top: 20px; }
}

@media (max-width: 700px) {
  .detail-page .header-actions .button { display: none; }
  .deep-type-nav { display: flex; overflow-x: auto; padding-bottom: 7px; }
  .deep-type-button { min-width: 145px; }
  .profile-strip { grid-template-columns: repeat(2, 1fr); }
  .profile-item:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .profile-item:nth-child(4) { border-top: 1px solid var(--line); }
  .deep-section { grid-template-columns: 1fr; gap: 5px; padding-block: 48px; }
  .large-checklist, .language-layout, .finish-grid, .example-plan { grid-template-columns: 1fr; }
  .finish-grid { grid-column: 1; gap: 38px; }
  .structure-row { grid-template-columns: 1fr; gap: 9px; }
  .deep-pagination { flex-wrap: wrap; }
  .deep-pagination .button { flex: 1; min-width: 135px; }
}

@media print {
  .detail-page .site-header, .detail-page .deep-sidebar, .detail-page .site-footer, .detail-page .deep-pagination { display: none !important; }
  .detail-page .deep-layout { display: block; width: 100%; padding: 0; }
  .detail-page .deep-hero h1 { font-size: 32pt; }
  .detail-page .deep-section { display: block; padding: 18px 0; break-inside: avoid; }
  .detail-page .section-index { display: none; }
  .detail-page .worked-example { color: #111; background: white; border: 1px solid #ccc; }
  .detail-page .worked-example * { color: #111 !important; }
}