.service-detail-hero { position: relative; min-height: 650px; display: grid; align-items: end; padding: 82px 0; overflow: hidden; color: var(--white); background: var(--navy-deep); }
.service-detail-hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,26,61,.97) 0%, rgba(4,26,61,.8) 46%, rgba(4,26,61,.18) 78%); }
.service-detail-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.service-hero-content { position: relative; z-index: 1; max-width: 710px; }
.service-breadcrumb { min-height: 44px; display: inline-flex; align-items: center; margin-bottom: 26px; color: #c8daf0; font-size: .78rem; font-weight: 700; text-underline-offset: 4px; }
.service-detail-hero h1 { margin: 0; font-size: clamp(3rem, 6vw, 6.5rem); line-height: .94; letter-spacing: -.065em; text-wrap: balance; }
.service-detail-hero h1 em { color: #f2a36c; font-style: normal; }
.service-detail-hero p { max-width: 640px; margin: 26px 0 0; color: #d4dfed; font-size: 1.06rem; }
.service-hero-actions { display: flex; flex-wrap: wrap; gap: 22px; align-items: center; margin-top: 32px; }
.service-hero-actions .text-link { color: var(--white); }
.service-photo-note { position: absolute; right: 22px; bottom: 18px; z-index: 2; color: rgba(255,255,255,.8); font-size: .68rem; }

.service-jump { position: sticky; top: 82px; z-index: 50; border-bottom: 1px solid var(--line); background: rgba(255,253,248,.95); backdrop-filter: blur(12px); }
.service-jump .container { display: flex; gap: 26px; overflow-x: auto; }
.service-jump a { min-width: max-content; min-height: 56px; display: inline-flex; align-items: center; color: var(--muted); font-size: .79rem; font-weight: 700; text-decoration: none; }
.service-jump a:hover { color: var(--orange-dark); }

.service-intro-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 96px; }
.service-intro-grid h2, .scope-heading h2, .estimate-panel h2 { margin: 0; font-size: clamp(2.3rem, 4.5vw, 4.6rem); line-height: 1.02; letter-spacing: -.055em; }
.service-intro-copy > p { margin-top: 0; color: var(--muted); font-size: 1.04rem; }
.service-principles { display: grid; grid-template-columns: 1fr 1fr; gap: 0 30px; margin-top: 36px; border-top: 2px solid var(--navy); }
.service-principles article { padding: 25px 0; border-bottom: 1px solid var(--line); }
.service-principles strong { display: block; color: var(--navy); }
.service-principles p { margin: 6px 0 0; color: var(--muted); font-size: .85rem; }

.scope-section { background: var(--cream); }
.scope-heading { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: end; margin-bottom: 50px; }
.scope-heading > p { margin: 0; color: var(--muted); }
.scope-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 24px; }
.scope-column { padding: 38px; background: var(--paper); }
.scope-column.accent { color: var(--white); background: var(--navy); }
.scope-column h3 { margin: 0 0 28px; font-size: 1.35rem; }
.scope-list { margin: 0; padding: 0; list-style: none; }
.scope-list li { position: relative; padding: 15px 0 15px 32px; border-top: 1px solid currentColor; }
.scope-list li::before { content: ""; position: absolute; left: 2px; top: 24px; width: 12px; height: 6px; border-left: 2px solid var(--orange); border-bottom: 2px solid var(--orange); transform: rotate(-45deg); }
.scope-column:not(.accent) .scope-list li { border-color: var(--line); }
.scope-column .scope-note { margin: 24px 0 0; color: inherit; opacity: .72; font-size: .78rem; }

.detail-process { counter-reset: step; display: grid; grid-template-columns: 1fr 1fr; gap: 0 50px; margin-top: 48px; }
.detail-process article { position: relative; min-height: 180px; padding: 32px 0 32px 70px; border-top: 1px solid var(--line); counter-increment: step; }
.detail-process article::before { content: "0" counter(step); position: absolute; left: 0; top: 31px; color: var(--orange-dark); font-size: .8rem; font-weight: 800; }
.detail-process h3 { margin: 0 0 9px; color: var(--navy); font-size: 1.22rem; }
.detail-process p { margin: 0; color: var(--muted); font-size: .9rem; }

.estimate-section { color: var(--white); background: var(--navy-deep); }
.estimate-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; align-items: start; }
.estimate-panel h2 { color: var(--white); }
.estimate-panel > p { color: #bdcbe0; }
.estimate-factors { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.estimate-factors article { min-height: 155px; padding: 24px; border: 1px solid rgba(255,255,255,.2); }
.estimate-factors strong { display: block; margin-bottom: 8px; color: #f2a36c; }
.estimate-factors p { margin: 0; color: #bdcbe0; font-size: .84rem; }

.related-services { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.related-services a { min-height: 190px; display: flex; align-items: end; justify-content: space-between; gap: 20px; padding: 30px; color: var(--white); background: var(--navy); text-decoration: none; transition: transform .2s var(--ease), background-color .2s var(--ease); }
.related-services a:nth-child(2) { background: var(--orange-dark); }
.related-services a:hover { transform: translateY(-4px); }
.related-services strong { font-size: 1.35rem; }
.related-services span { font-size: 1.6rem; }

@media (max-width: 900px) {
  .service-detail-hero { min-height: 600px; }
  .service-jump { top: 72px; }
  .service-intro-grid, .estimate-grid { grid-template-columns: 1fr; gap: 48px; }
  .scope-heading { grid-template-columns: 1fr; gap: 20px; }
}

@media (max-width: 640px) {
  .service-detail-hero { min-height: 560px; padding: 48px 0; align-items: end; }
  .service-detail-hero::after { background: linear-gradient(0deg, rgba(4,26,61,.98) 0%, rgba(4,26,61,.73) 68%, rgba(4,26,61,.25)); }
  .service-detail-hero h1 { font-size: clamp(2.45rem, 12vw, 3.45rem); line-height: 1.02; letter-spacing: -.05em; }
  .service-detail-hero p { margin-top: 20px; font-size: 1rem; }
  .service-hero-actions { align-items: stretch; flex-direction: column; gap: 10px; margin-top: 26px; }
  .service-hero-actions .button, .service-hero-actions .text-link { width: 100%; justify-content: center; }
  .service-photo-note { display: none; }
  .service-jump { position: static; backdrop-filter: none; }
  .service-jump .container { gap: 8px; padding-block: 8px; scroll-snap-type: x proximity; scrollbar-width: none; }
  .service-jump .container::-webkit-scrollbar { display: none; }
  .service-jump a { min-height: 44px; padding: 0 13px; border: 1px solid var(--line); background: var(--cream); scroll-snap-align: start; }
  .service-detail-hero + .service-jump + section, .scope-section, .estimate-section, .faq { scroll-margin-top: 80px; }
  [id="tong-quan"], [id="pham-vi"], [id="quy-trinh"], [id="uoc-tinh"], [id="hoi-dap"] { scroll-margin-top: 80px; }
  .service-principles, .scope-grid, .detail-process, .estimate-factors, .related-services { grid-template-columns: 1fr; }
  .scope-column { padding: 28px 22px; }
  .detail-process article { min-height: auto; padding: 26px 0 26px 50px; }
  .related-services a { min-height: 150px; }
}