.expertise-page { --service-color: #79dff0; --service-glow: rgba(73,216,240,.12); }
.expertise-development { --service-color: #b8b2ff; --service-glow: rgba(138,124,255,.17); }
.expertise-analytics { --service-color: #b0ebda; --service-glow: rgba(103,211,178,.12); }
.expertise-page :focus-visible { outline: 2px solid var(--service-color); outline-offset: 6px; }
.expertise-page .eyebrow { color: var(--service-color); }
.expertise-hero { position: relative; isolation: isolate; padding: 9rem var(--pad) 0; background: radial-gradient(ellipse at 85% 40%, var(--service-glow), transparent 55%); }
.expertise-grid { position: absolute; inset: 0; z-index: -1; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 80px 80px; opacity: .25; mask-image: linear-gradient(to bottom, black, transparent); }
.breadcrumbs { display: flex; gap: .9rem; color: #aeb0bb; font: .7rem "DM Mono", monospace; }
.breadcrumbs a:hover { color: white; }
.expertise-hero-layout { display: grid; grid-template-columns: minmax(0, 2.5fr) minmax(15rem, 1fr); gap: clamp(2rem, 5vw, 6rem); align-items: center; padding: clamp(3rem, 7vw, 7rem) 0 5rem; }
.expertise-hero h1 { font-size: clamp(3.2rem, 6.6vw, 7.5rem); letter-spacing: -.065em; line-height: 1.03; overflow-wrap: break-word; }
.expertise-hero h1 > span { color: var(--service-color); }
.expertise-lead { max-width: 44rem; margin: 2rem 0; color: #b4b7c3; font-size: clamp(1rem, 1.35vw, 1.2rem); line-height: 1.8; }
.expertise-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1.5rem 2rem; margin-top: 2.5rem; }
.expertise-button { display: inline-flex; align-items: center; justify-content: space-between; gap: 1.5rem; padding: 1.1rem 1.4rem; border: 1px solid var(--service-color); background: var(--service-color); color: #08090d; font-size: .85rem; font-weight: 700; transition: background .2s, color .2s; }
.expertise-button:hover { background: transparent; color: var(--service-color); }
.expertise-secondary { display: inline-flex; gap: 1rem; padding: .7rem 0; border-bottom: 1px solid var(--line); font-size: .8rem; }
.expertise-summary { position: relative; padding: 2rem; border: 1px solid var(--line); background: rgba(16,17,23,.7); }
.expertise-symbol { display: block; margin-bottom: 3rem; color: var(--service-color); font: 300 5rem/1 "DM Mono", monospace; }
.expertise-summary .eyebrow { font-size: .6rem; }
.expertise-promise { margin: 0 0 2rem; font-size: clamp(1.5rem, 2.3vw, 2.3rem); line-height: 1.25; letter-spacing: -.04em; }
.expertise-summary ul { list-style: none; padding: 0; margin: 0; }
.expertise-summary li { padding: .9rem 0; border-top: 1px solid var(--line); color: #b4b7c3; font-size: .8rem; line-height: 1.5; }
.expertise-summary li::before { content: "↗"; color: var(--service-color); margin-right: .75rem; }
.expertise-sections { display: flex; flex-wrap: wrap; gap: 1rem 2.5rem; padding: 1.5rem 0; border-top: 1px solid var(--line); font: .7rem/1.6 "DM Mono", monospace; color: #b4b7c3; }
.expertise-sections a:hover { color: var(--service-color); }
.expertise-section { padding: clamp(4rem, 8vw, 8rem) var(--pad); border-top: 1px solid var(--line); scroll-margin-top: 6rem; }
.expertise-section-head { display: grid; grid-template-columns: 1fr 2.5fr; gap: 2rem; margin-bottom: 3.5rem; }
.expertise-section h2, .expertise-contact h2 { max-width: 62rem; margin: 0; font-size: clamp(2rem, 4.1vw, 4.5rem); font-weight: 500; line-height: 1.1; letter-spacing: -.05em; }
.expertise-section-head p:not(.eyebrow) { max-width: 43rem; margin: 1.5rem 0 0; color: #aeb0bb; line-height: 1.8; }
.expertise-offers { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.expertise-offer { display: flex; flex-direction: column; padding: clamp(1.5rem, 3vw, 3rem); border: 1px solid var(--line); background: var(--surface); }
.expertise-offer h3, .expertise-scenario-grid h3, .expertise-process h3, .expertise-related h3 { margin: 1.5rem 0 1rem; font-size: clamp(1.4rem, 2.1vw, 2rem); font-weight: 500; letter-spacing: -.035em; line-height: 1.25; }
.expertise-offer p, .expertise-scenario-grid p, .expertise-process p, .expertise-related p { margin: 0 0 1.5rem; color: #aeb0bb; line-height: 1.8; }
.expertise-offer .expertise-result { margin: auto 0 0; padding-top: 1.5rem; border-top: 1px solid var(--line); color: var(--service-color); font-size: .85rem; }
.expertise-scenarios, .expertise-faq { background: #0d0e13; }
.expertise-scenario-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2.5rem; }
.expertise-scenario-grid article { border-top: 1px solid var(--line); padding-top: 1.5rem; }
.expertise-small-arrow { color: var(--service-color); font-size: 2rem; }
.expertise-process { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 2rem; list-style: none; margin: 0; padding: 0; }
.expertise-process li { border-top: 1px solid var(--line); padding-top: 1.5rem; }
.expertise-step-number { font: .8rem "DM Mono", monospace; color: var(--service-color); }
.expertise-faq-list { max-width: 58rem; margin-left: auto; }
.expertise-faq details { border-top: 1px solid var(--line); }
.expertise-faq details:last-child { border-bottom: 1px solid var(--line); }
.expertise-faq summary { display: flex; justify-content: space-between; gap: 1.5rem; padding: 1.6rem 0; list-style: none; font-size: clamp(1rem, 1.5vw, 1.3rem); line-height: 1.5; cursor: pointer; }
.expertise-faq summary::-webkit-details-marker { display: none; }
.expertise-faq summary span { color: var(--service-color); font-size: 1.5rem; }
.expertise-faq details[open] summary span { transform: rotate(45deg); }
.expertise-faq details p { max-width: 49rem; margin: 0 0 1.8rem; color: #aeb0bb; line-height: 1.8; }
.expertise-related-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; margin-top: 3rem; }
.expertise-related-grid > a { display: flex; flex-direction: column; padding: clamp(1.5rem, 3vw, 3rem); border: 1px solid var(--line); transition: border-color .2s, background .2s; }
.expertise-related-grid > a:hover { border-color: var(--service-color); background: var(--surface); }
.expertise-related-grid .eyebrow { margin-bottom: 0; }
.expertise-related-link { display: flex; justify-content: space-between; gap: 1rem; padding-top: 1.5rem; margin-top: auto; border-top: 1px solid var(--line); font-size: .8rem; }
.expertise-related-link > span { color: var(--service-color); }
.expertise-contact { padding: clamp(5rem, 10vw, 10rem) var(--pad); text-align: center; border-top: 1px solid var(--line); background: radial-gradient(ellipse at 50% 100%, var(--service-glow), transparent 65%); }
.expertise-contact h2 { margin-inline: auto; }
.expertise-contact > p:not(.eyebrow) { max-width: 39rem; margin: 2rem auto; color: #aeb0bb; line-height: 1.8; }
@media (max-width: 1050px) {
  .expertise-hero-layout { grid-template-columns: minmax(0, 1fr); }
  .expertise-summary { max-width: 44rem; }
  .expertise-symbol { float: right; margin: 0 0 1rem 1rem; }
  .expertise-process { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .expertise-hero { padding-top: 7rem; }
  .expertise-hero h1 { font-size: clamp(2.5rem, 9vw, 4rem); }
  .expertise-hero-layout { padding-bottom: 3rem; }
  .expertise-section-head, .expertise-offers, .expertise-scenario-grid, .expertise-related-grid { grid-template-columns: minmax(0, 1fr); }
  .expertise-section-head { gap: .5rem; margin-bottom: 2.5rem; }
  .expertise-sections { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; font-size: .65rem; }
  .expertise-actions { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 420px) {
  .expertise-process { grid-template-columns: minmax(0, 1fr); }
  .expertise-button { font-size: .78rem; gap: .8rem; }
}

/* Reading rhythm and chapter navigation */
.expertise-sections { position: sticky; top: var(--header-height); z-index: 15; padding-inline: var(--pad); background: rgba(8,9,13,.94); backdrop-filter: blur(18px); border-bottom: 1px solid var(--line); }
.expertise-sections a { position: relative; transition: color .25s; }
.expertise-sections a::after { content: ""; position: absolute; inset: auto 0 -.55rem; height: 2px; background: var(--service-color); transform: scaleX(0); transform-origin: left; transition: transform .35s; }
.expertise-sections a[aria-current] { color: var(--service-color); }
.expertise-sections a[aria-current]::after { transform: scaleX(1); }
.expertise-chapter-progress { position: absolute; inset: auto 0 -1px; height: 1px; background: var(--service-color); transform: scaleX(var(--chapter-progress, 0)); transform-origin: left; }
.expertise-section { scroll-margin-top: 11rem; }
.expertise-section h2 { text-decoration: underline; text-decoration-color: var(--service-glow); text-underline-offset: .2em; text-decoration-thickness: 1px; }
@supports (background-clip: text) {
  .expertise-section h2 { background: linear-gradient(100deg, var(--ink) 0%, var(--service-color) var(--heading-progress, 100%), #9b9eae var(--heading-progress, 100%)); background-clip: text; color: transparent; text-decoration: none; }
}
.expertise-offer, .expertise-related-grid > a { position: relative; isolation: isolate; overflow: hidden; transition: border-color .3s, box-shadow .3s, transform .3s; }
.expertise-offer::before, .expertise-related-grid > a::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(380px circle at var(--pointer-x, 50%) var(--pointer-y, 50%), var(--service-glow), transparent 75%); opacity: 0; transition: opacity .35s; pointer-events: none; }
.expertise-offer:focus-within, .expertise-related-grid > a:focus-visible { border-color: var(--service-color); }
.expertise-related-link > span, .expertise-button > span, .expertise-small-arrow { display: inline-block; transition: transform .3s; }
.expertise-related-grid > a:hover .expertise-related-link > span, .expertise-button:hover > span { transform: translate(3px, -3px); }
.expertise-process { position: relative; }
.expertise-process li { position: relative; transition: border-color .5s; }
.expertise-process li::before { content: ""; position: absolute; top: -2px; left: 0; width: 100%; height: 2px; background: var(--service-color); transform: scaleX(0); transform-origin: left; transition: transform .8s; }
.expertise-process li.is-reached::before { transform: scaleX(1); }
.expertise-step-number { display: inline-grid; place-items: center; width: 2.5rem; height: 2.5rem; border: 1px solid var(--line); border-radius: 50%; transition: background .5s, border-color .5s, box-shadow .5s; }
.is-reached .expertise-step-number { background: var(--service-glow); border-color: var(--service-color); box-shadow: 0 0 25px var(--service-glow); }
.expertise-faq summary { transition: color .25s; }
.expertise-faq summary:hover, .expertise-faq details[open] summary { color: var(--service-color); }
.expertise-faq summary span { transition: transform .3s; }
.expertise-faq details[open] p { animation: expertise-answer .35s ease both; }
@keyframes expertise-answer { from { opacity: .2; transform: translateY(-8px); } to { opacity: 1; transform: none; } }

/* Three visual signatures, using local graphics only. */
.expertise-summary { overflow: hidden; }
.expertise-art { position: relative; height: 13rem; margin: -1rem -1rem 2rem; isolation: isolate; }
.art-orbit { position: absolute; z-index: -1; width: 11rem; height: 11rem; left: calc(50% - 5.5rem); top: .5rem; border: 1px solid var(--service-glow); border-radius: 50%; }
.orbit-inner { inset: 2.5rem auto auto calc(50% - 3.5rem); width: 7rem; height: 7rem; border-style: dashed; border-color: var(--service-color); opacity: .2; }
.orbit-outer::after { content: ""; position: absolute; top: 1.3rem; left: 1.3rem; width: .4rem; height: .4rem; border-radius: 50%; background: var(--service-color); box-shadow: 0 0 16px var(--service-color); }
.expertise-art svg { position: absolute; inset: 0; width: 100%; height: 11rem; overflow: visible; }
.art-route { stroke: var(--service-color); stroke-width: 2; stroke-dasharray: 360; stroke-dashoffset: 0; }
.expertise-art circle { fill: var(--bg); stroke: var(--service-color); stroke-width: 2; }
.expertise-art .art-destination { fill: var(--service-color); }
.art-caption { position: absolute; bottom: 0; left: 0; right: 0; text-align: center; color: var(--service-color); font: .55rem/1.6 "DM Mono", monospace; letter-spacing: .04em; }
.art-window { position: absolute; width: 80%; max-width: 16rem; height: 10rem; left: 50%; top: .5rem; transform: translateX(-50%) rotate(-5deg); background: #101117; border: 1px solid var(--service-color); border-radius: .5rem; box-shadow: 0 12px 40px var(--service-glow); overflow: hidden; }
.art-window-bar { display: flex; gap: .3rem; padding: .6rem; border-bottom: 1px solid var(--line); }
.art-window-bar i { width: .3rem; height: .3rem; border-radius: 50%; background: var(--service-color); opacity: .5; }
.art-code { display: grid; gap: .55rem; padding: .8rem 1rem; color: var(--service-color); font: .65rem "DM Mono", monospace; }
.art-code i { height: 3px; background: var(--service-color); opacity: .4; width: 70%; margin-left: .8rem; transform-origin: left; }
.art-code i:nth-of-type(2) { width: 50%; opacity: .7; }
.art-code i:nth-of-type(3) { width: 60%; }
.art-cursor { position: absolute; right: 1.2rem; bottom: 1.2rem; width: .4rem; height: .8rem; background: var(--service-color); }
.art-chart { position: absolute; inset: 1.3rem 1.5rem 2.5rem; display: flex; align-items: end; gap: 6%; padding-bottom: .5rem; border-bottom: 1px solid var(--service-color); background: repeating-linear-gradient(to top, transparent 0 25%, var(--line) 25% calc(25% + 1px)); }
.art-chart i { flex: 1; height: var(--bar-height); background: linear-gradient(to top, var(--service-glow), var(--service-color)); transform-origin: bottom; border-radius: 2px 2px 0 0; }
.art-chart i:nth-child(1) { --bar-height: 28%; --bar-delay: 0s; }
.art-chart i:nth-child(2) { --bar-height: 48%; --bar-delay: .1s; }
.art-chart i:nth-child(3) { --bar-height: 38%; --bar-delay: .2s; }
.art-chart i:nth-child(4) { --bar-height: 64%; --bar-delay: .3s; }
.art-chart i:nth-child(5) { --bar-height: 54%; --bar-delay: .4s; }
.art-chart i:nth-child(6) { --bar-height: 78%; --bar-delay: .5s; }
.art-chart i:nth-child(7) { --bar-height: 95%; --bar-delay: .6s; }
.art-scan { position: absolute; inset: 0 auto 0 0; width: 1px; background: var(--service-color); box-shadow: 0 0 12px var(--service-color); opacity: .5; }

@media (prefers-reduced-motion: no-preference) {
  .expertise-hero h1 { animation: expertise-rise .9s cubic-bezier(.16,1,.3,1) both; }
  .expertise-lead, .expertise-actions { animation: expertise-rise .9s .15s cubic-bezier(.16,1,.3,1) both; }
  .expertise-summary { animation: expertise-rise 1s .25s cubic-bezier(.16,1,.3,1) both; }
  .expertise-grid { transform: translateY(var(--hero-drift, 0px)); }
  .has-entered { animation: expertise-rise .85s var(--enter-delay, 0ms) cubic-bezier(.16,1,.3,1) backwards; }
  .orbit-outer { animation: expertise-orbit 24s linear infinite; }
  .orbit-inner { animation: expertise-orbit 32s linear infinite reverse; }
  .art-route { animation: expertise-route 2s .4s ease both; }
  .art-destination { animation: expertise-destination 3s 2s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
  .art-code i { animation: expertise-code 3.5s ease-in-out infinite; }
  .art-code i:nth-of-type(2) { animation-delay: .2s; }
  .art-code i:nth-of-type(3) { animation-delay: .4s; }
  .art-cursor { animation: expertise-blink 1.4s steps(2, jump-none) infinite; }
  .art-chart i { animation: expertise-bars 1.5s var(--bar-delay) cubic-bezier(.16,1,.3,1) both; }
  .art-scan { animation: expertise-scan 5s ease-in-out infinite alternate; }
  .expertise-contact { position: relative; isolation: isolate; overflow: hidden; }
  .expertise-contact::before { content: ""; position: absolute; inset: 5% 10%; z-index: -1; border: 1px solid var(--service-glow); border-radius: 50%; animation: expertise-halo 8s ease-in-out infinite; }
}
@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .expertise-offer:hover, .expertise-related-grid > a:hover { transform: translateY(-5px); border-color: var(--service-color); box-shadow: 0 12px 35px rgba(0,0,0,.2); }
  .expertise-offer:hover::before, .expertise-related-grid > a:hover::before { opacity: 1; }
  .expertise-scenario-grid article:hover .expertise-small-arrow { transform: translate(5px, -5px); }
}
@keyframes expertise-rise { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: translateY(0); } }
@keyframes expertise-orbit { to { transform: rotate(360deg); } }
@keyframes expertise-route { from { stroke-dashoffset: 360; } to { stroke-dashoffset: 0; } }
@keyframes expertise-destination { 50% { opacity: .5; transform: scale(.7); } }
@keyframes expertise-code { 50% { transform: scaleX(.7); opacity: .8; } }
@keyframes expertise-blink { to { opacity: .2; } }
@keyframes expertise-bars { from { transform: scaleY(.05); } to { transform: scaleY(1); } }
@keyframes expertise-scan { to { left: 100%; } }
@keyframes expertise-halo { 50% { transform: scale(1.15) rotate(-10deg); opacity: .4; } }
@media (max-width: 1050px) {
  .expertise-summary { display: grid; grid-template-columns: minmax(10rem, 1fr) minmax(0, 2fr); gap: 0 2rem; align-items: center; }
  .expertise-art { grid-row: span 3; margin: 0; }
  .expertise-summary .eyebrow { margin-bottom: 1rem; }
  .expertise-promise { margin-bottom: 1.5rem; }
}
@media (max-width: 760px) {
  .expertise-sections { gap: .8rem 1rem; }
  .expertise-sections a::after { bottom: -.2rem; }
  .expertise-section { scroll-margin-top: 11rem; }
  .expertise-summary { display: block; }
  .expertise-art { max-width: 21rem; margin: 0 auto 2rem; }
}
@media (prefers-reduced-motion: reduce) {
  .expertise-page *, .expertise-page *::before, .expertise-page *::after { animation: none !important; transition: none !important; }
  .expertise-grid { transform: none; }
  .expertise-section h2 { background: none; color: var(--ink); }
  .art-scan { display: none; }
}