/* October version: additive evolution of the original Big5 brand tokens. */
.ott-hero {min-height:680px;display:flex;align-items:center;background:linear-gradient(90deg,rgba(255,255,255,.96) 0%,rgba(240,247,246,.90) 40%,rgba(240,247,246,.14) 78%),url('/assets/ott/hero-pv-hydrogen-v1.webp') center/cover no-repeat;}
.ott-hero .hero-inner {grid-template-columns:1fr;position:relative;}
.ott-hero .hero-content {max-width:700px;}
.ott-hero .hero-headline {max-width:17ch;font-size:clamp(3rem,5vw,5rem);}
.ott-hero .hero-subtitle {max-width:48ch;}
.ott-hero .hero-actions {max-width:600px;}
.navbar {background:rgba(255,255,255,.92);backdrop-filter:blur(14px);}
.section {padding-block:clamp(3.5rem,7vw,6rem);}
.section-header {max-width:820px;margin-bottom:2.5rem;}
.section-header h2 {text-wrap:balance;}
.section-subtitle {max-width:75ch;}
.card {border-radius:var(--radius-lg,12px);}
.service-path {position:relative;overflow:hidden;padding:2.5rem;min-height:360px;display:flex;flex-direction:column;align-items:flex-start;gap:1rem;background:linear-gradient(180deg,rgba(255,255,255,.95),rgba(240,247,246,.95));border-top:3px solid var(--color-primary);}
.service-path::after {content:'';position:absolute;inset:auto -40px -80px auto;width:260px;height:260px;border:1px solid var(--color-primary-border);border-radius:50%;pointer-events:none;}
.service-path h2,.service-path h3 {max-width:22ch;margin:0;}
.service-path .hero-actions,.service-path > .btn {margin-top:auto;}
.service-path .tag {margin:0;}
.output-grid {gap:1.5rem;}
.output-panel {background:var(--color-surface);border:1px solid var(--color-primary-border);border-radius:12px;overflow:hidden;}
.output-thumb-button {height:100%;}
.output-image {aspect-ratio:3/2;overflow:hidden;background:var(--color-primary-bg);}
.output-image img {width:100%;height:100%;object-fit:cover;transition:transform .35s;}
.output-thumb-button:hover img {transform:scale(1.025);}
.output-content {padding:1.6rem;}
.output-caption {font-size:.95rem;}
.expertise-band {background:linear-gradient(90deg,rgba(240,247,246,.97),rgba(240,247,246,.82)),url('/assets/ott/solar-detail.webp') center/cover;}
.expertise-inner {display:grid;grid-template-columns:1fr 1fr;gap:1.5rem 4rem;align-items:center;}
.expertise-inner .label {grid-column:1/-1;}
.expertise-inner h2 {font-size:clamp(2rem,3.5vw,3.25rem);max-width:18ch;}
.expertise-inner .btn {grid-column:2;justify-self:start;}
.ott-cta {padding:clamp(2rem,5vw,4rem);background:var(--color-primary-bg);border:1px solid var(--color-primary-border);border-radius:16px;}
.hero-internal {background:linear-gradient(90deg,rgba(240,247,246,.97),rgba(240,247,246,.90) 60%,rgba(240,247,246,.45)),url('/assets/ott/solar-detail.webp') right center/cover;}
.hero-internal-headline {max-width:22ch;text-wrap:balance;}
.hero-internal-subtitle {max-width:65ch;}
.scope-details {border-top:1px solid var(--color-primary-border);padding-block:1rem;}
.scope-details summary,.catalog-details > summary {cursor:pointer;font-weight:600;color:var(--color-text-heading);padding-block:.5rem;}
.scope-details summary:focus-visible,.catalog-details summary:focus-visible {outline:2px solid var(--color-primary);outline-offset:6px;}
.scope-details[open] > summary {margin-bottom:1.25rem;}
.catalog-details {background:var(--color-surface-alt);padding-block:1.5rem;}
.catalog-details > summary {font-size:1.35rem;}
.catalog-details .section {padding-block:2rem;}
.level-grid {display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:1.25rem;}
.level-card {padding:1.75rem;display:flex;flex-direction:column;gap:1rem;}
.level-card h3 {margin:0;font-size:1.4rem;}
.level-card h4 {margin-block:1rem .5rem;}
.level-price {font-size:1.3rem;color:var(--color-primary);font-weight:500;}
.level-card .btn {margin-top:auto;align-self:flex-start;}
.matrix-details {margin-top:2rem;}
.cmp-scroll {max-height:70vh;}
.cmp-table thead th {position:sticky;top:0;z-index:1;}
.service-jump {display:flex;gap:1rem;flex-wrap:wrap;padding-block:1.5rem;border-bottom:1px solid var(--color-primary-border);}
.service-jump a {padding:.6rem 1rem;border:1px solid var(--color-primary-border);border-radius:100px;font-size:.9rem;}
section[id] {scroll-margin-top:100px;}
.contact-page-grid {max-width:780px;}
.form-extra .form-group {margin-block:1rem;}
.method-steps {gap:1.75rem;}
.method-step {text-align:left;border-top:2px solid var(--color-primary-border);padding-top:1.5rem;}
.method-steps::before {display:none;}
.method-number {margin-left:0;}
.footer-links {flex-wrap:wrap;}
@media(min-width:1024px) {.nav-links {gap:1.4rem;}}
@media(max-width:760px) {
 .ott-hero {min-height:650px;align-items:flex-start;padding-top:3rem;background:linear-gradient(180deg,rgba(255,255,255,.97),rgba(240,247,246,.92) 52%,rgba(240,247,246,.24)),url('/assets/ott/hero-pv-hydrogen-mobile-v1.webp') 70% center/cover;}
 .ott-hero .hero-headline {font-size:clamp(2.7rem,10vw,3.6rem);max-width:17ch;}
 .hero-actions {gap:1rem;}
 .hero-actions .btn {white-space:normal;text-align:center;}
 .service-path {padding:1.75rem;min-height:0;}
 .expertise-inner {grid-template-columns:1fr;gap:1.25rem;}
 .expertise-inner .btn {grid-column:1;}
 .hero-internal {background:linear-gradient(90deg,rgba(240,247,246,.97),rgba(240,247,246,.88)),url('/assets/ott/solar-detail.webp') center/cover;}
 .pricing-table thead {position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);}
 .pricing-table,.pricing-table tbody,.pricing-table tr,.pricing-table td {display:block;width:100%;}
 .pricing-table tr {padding:1rem 0;border-bottom:1px solid var(--color-primary-border);}
 .pricing-table td {border:0;padding:.5rem .75rem;overflow-wrap:anywhere;}
 .pricing-table td:first-child {font-weight:600;color:var(--color-text-heading);}
 .pricing-table td[data-label]::before {content:attr(data-label);display:block;font-size:.7rem;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted);margin-bottom:.25rem;}
 .level-grid {grid-template-columns:1fr;}
 .service-jump {gap:.5rem;}
}
@media(prefers-reduced-motion:reduce) {*,*::before,*::after {scroll-behavior:auto!important;transition:none!important;} }
@media(max-width:760px) {.btn {max-width:100%;white-space:normal;text-align:center;overflow-wrap:anywhere;}.card,.method-step {min-width:0;}.card-title {overflow-wrap:anywhere;}}

.ott-cta {background:linear-gradient(90deg,rgba(240,247,246,.98),rgba(240,247,246,.91)),url('/assets/ott/grid-infrastructure.webp') center/cover;}
.nav-links a[aria-current=page] {color:var(--color-primary);text-decoration:underline;text-underline-offset:6px;}

/* Recovered commercial HTML examples: one catalogue, no repeated screenshots. */
.example-bridge {background:var(--color-primary-bg);border-block:1px solid var(--color-primary-border);}
.example-bridge-inner {display:flex;align-items:center;justify-content:space-between;gap:3rem;}
.example-bridge-inner>div {max-width:710px;}
.example-bridge h2 {margin-bottom:1rem;}
.example-bridge p:not(.label) {color:var(--color-text-body);}
.example-bridge .btn {flex-shrink:0;}
.example-index {display:flex;gap:2rem;padding-block:1.5rem;}
.example-index a {display:flex;gap:1rem;color:var(--color-primary);font-weight:600;}
.example-index span,.example-number {font-family:var(--font-mono);font-size:.8rem;color:var(--color-text-muted);}
.example-family {scroll-margin-top:100px;}
.example-family-header {display:flex;justify-content:space-between;align-items:flex-end;gap:2rem;margin-bottom:2.5rem;}
.example-family-header>div {max-width:750px;}
.example-family-header h2 {margin-bottom:1rem;}
.example-levels {display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1.5rem;}
.example-levels-three {grid-template-columns:repeat(3,minmax(0,1fr));}
.example-level {border-top:2px solid var(--color-primary);padding:1.5rem 0;display:flex;flex-direction:column;gap:1rem;min-width:0;}
.example-level h3 {font-size:1.35rem;}
.example-level p {color:var(--color-text-body);flex:1;}
.example-level .btn {align-self:flex-start;text-align:left;}
.example-language {font-size:.75rem;color:var(--color-text-muted);}
.example-note {font-size:.85rem;color:var(--color-text-muted);padding-top:1rem;}
.service-example-link {margin-top:2rem;display:flex;flex-wrap:wrap;align-items:center;gap:1rem 2rem;}
.service-example-link span {font-size:.8rem;color:var(--color-text-muted);max-width:600px;}
@media(max-width:1000px){.example-levels{grid-template-columns:repeat(2,minmax(0,1fr));}.example-levels-three{grid-template-columns:repeat(3,minmax(0,1fr));}.example-bridge-inner,.example-family-header{align-items:flex-start;flex-direction:column;gap:1.5rem;}}
@media(max-width:640px){.example-levels,.example-levels-three{grid-template-columns:1fr;}.example-index{gap:1.5rem;flex-wrap:wrap;}.example-level{gap:.75rem;}}

.hero-internal.hero-internal-plain {background:var(--color-primary-bg);}