.s48-surveillance-cn{--ink:#edf3f8;--muted:#aabcc8;--accent:#65c4d0;--line:#304654;background:#05080d;color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif}
.s48-surveillance-cn *{box-sizing:border-box}.s48-surveillance-cn h1,.s48-surveillance-cn h2,.s48-surveillance-cn h3{color:var(--ink);margin:0;letter-spacing:-.035em}.s48-surveillance-cn h2{font-size:clamp(32px,3.1vw,48px);line-height:1.2}.s48-surveillance-cn h3{font-size:21px;line-height:1.45}.s48-surveillance-cn p{color:var(--muted);font-size:17px;line-height:1.85;margin:0 0 18px}.s48-surveillance-cn a{color:var(--accent);text-underline-offset:5px}.s48-surveillance-cn a:focus-visible,.s48-surveillance-cn button:focus-visible,.s48-surveillance-cn summary:focus-visible{outline:2px solid var(--accent);outline-offset:5px}.s48c-wrap{width:min(1280px,calc(100% - 80px));margin:auto}.s48c-section{padding:64px 0}.s48c-tint{background:#0b1924}.s48c-split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}.s48c-section-head{margin-bottom:40px}.s48-surveillance-cn .s48c-eyebrow{font-size:11px!important;font-weight:600;letter-spacing:.16em;color:var(--accent);margin:0 0 24px!important;line-height:1.6}.s48c-hero{position:relative;min-height:100svh;display:flex;align-items:flex-end;isolation:isolate;overflow:hidden}.s48c-hero-image{position:absolute;width:100%;height:100%;inset:0;object-fit:cover;object-position:70% 86%;z-index:-2}.s48c-hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,8,13,.96),rgba(5,8,13,.54) 65%,rgba(5,8,13,.15)),linear-gradient(0deg,#05080d,transparent 70%);z-index:-1}.s48c-hero-inner{padding:180px 0 76px;display:flex;gap:80px;align-items:flex-end;justify-content:space-between}.s48c-hero-copy{max-width:800px}.s48-surveillance-cn h1{font-size:clamp(58px,7vw,104px);line-height:1.1;margin:0 0 24px}.s48-surveillance-cn .s48c-lead{font-size:20px;line-height:1.85;max-width:760px}.s48c-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}.s48-surveillance-cn .s48c-button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:14px 22px;background:var(--accent);border:1px solid var(--accent);border-radius:5px;color:#08313b;text-decoration:none;font-size:14px;font-weight:700}.s48-surveillance-cn .s48c-button-outline{background:transparent;color:var(--ink);border-color:#78909e}.s48-surveillance-cn .s48c-meta{font-size:11px!important;letter-spacing:.12em;margin:22px 0 0!important}.s48-surveillance-cn .s48c-hero-note{max-width:270px;border-top:1px solid var(--accent);padding-top:16px;font-size:12px;flex-shrink:0}.s48c-board{border:1px solid var(--line);padding:24px;background:#07121b}.s48c-board-bar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-bottom:18px;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted)}.s48c-board-bar button{background:transparent;color:var(--accent);border:1px solid #3e7c8c;padding:12px 16px;min-height:44px;cursor:pointer}.s48c-flow{display:grid;grid-template-columns:1fr 48px 1fr 1.4fr;align-items:center;padding:44px 0}.s48c-node{border:1px solid #496473;background:#0c1c27;padding:24px;position:relative}.s48c-node>span{font:11px monospace;color:var(--accent);letter-spacing:.12em;display:block;margin-bottom:14px}.s48-surveillance-cn .s48c-node p{font-size:14px;margin:10px 0 0}.s48c-trunk{height:2px;background:#3d7180;position:relative}.s48c-trunk i{display:block;width:20%;height:2px;background:var(--accent)}.s48c-branches{padding-left:48px;display:grid;gap:20px;position:relative}.s48c-branches:before{content:"";position:absolute;top:calc(100% / 6);bottom:calc(100% / 6);left:24px;border-left:1px solid #477788}.s48c-network:after{content:"";position:absolute;left:100%;top:50%;width:24px;border-top:1px solid #477788}.s48c-branches>.s48c-node:before{content:"";position:absolute;right:100%;top:50%;width:24px;height:2px;background:linear-gradient(90deg,#477788 60%,#65c4d0 60%,#65c4d0 80%,#477788 80%);background-size:60px 2px}.s48c-management{display:grid;grid-template-columns:150px 1fr;gap:24px;border-top:1px solid var(--line);padding:24px 0 0}.s48c-management strong{color:var(--accent)}.s48-surveillance-cn .s48c-management p{font-size:14px}.s48-surveillance-cn .s48c-caption{font-size:12px;margin:0}.s48-surveillance-cn .s48c-scheme{margin:12px 0 0!important}.s48c-scheme img{display:block;width:100%;height:auto;object-fit:contain}.s48-surveillance-cn figcaption{font-size:12px;color:#91a8b7;line-height:1.7;padding-top:12px}.s48c-services article{display:grid;grid-template-columns:72px 1fr;gap:28px;padding:30px 0;border-top:1px solid var(--line)}.s48c-services article>span{font:12px monospace;color:var(--accent)}.s48c-services p{max-width:950px;margin-top:10px!important}.s48c-scenes{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}.s48c-scenes article{border-top:1px solid #42707e;padding-top:24px}.s48c-scenes p{margin-top:14px!important}.s48c-deliverables{padding:0;margin:0!important;list-style:none;border:1px solid var(--line);background:#0a1620}.s48c-deliverables li{padding:20px 24px;color:var(--muted);border-bottom:1px solid var(--line)}.s48c-deliverables li:last-child{border-bottom:0}.s48c-faq{border-bottom:1px solid var(--line);padding:22px 0}.s48c-faq summary{font-size:20px;cursor:pointer;line-height:1.6;color:var(--ink)}.s48c-faq p{margin:18px 0 0!important;max-width:1050px}.s48c-contact{padding:80px 0}.s48c-contact h2{margin-bottom:22px}.s48c-contact .s48c-button{justify-self:end;align-self:center}.s48c-running .s48c-trunk i{animation:s48c-flow 8.4s linear infinite}.s48c-running .s48c-branches>.s48c-node:before{animation:s48c-branch 8.4s linear infinite}@keyframes s48c-flow{from{transform:translateX(0)}to{transform:translateX(400%)}}@keyframes s48c-branch{to{background-position:120px 0}}
@media(max-width:1000px){.s48c-hero-note{display:none}.s48c-split{gap:36px}.s48c-node{padding:18px}.s48-surveillance-cn .s48c-node h3{font-size:18px}}
@media(max-width:700px){.s48c-wrap{width:calc(100% - 40px)}.s48c-section{padding:44px 0}.s48c-split{grid-template-columns:1fr;gap:28px}.s48c-hero{min-height:0}.s48c-hero-inner{padding:170px 0 62px}.s48-surveillance-cn h1{font-size:46px}.s48-surveillance-cn h2{font-size:32px}.s48-surveillance-cn .s48c-lead{font-size:17px}.s48c-section-head{margin-bottom:28px}.s48c-board{padding:18px 14px}.s48c-board-bar{align-items:flex-start;font-size:12px}.s48c-board-bar button{font-size:11px;padding:10px;white-space:nowrap}.s48c-flow{display:flex;flex-direction:column;align-items:stretch;padding:28px 0}.s48c-trunk{height:30px;width:2px;align-self:center}.s48c-trunk i{height:6px;width:2px}.s48c-running .s48c-trunk i{animation-name:s48c-flow-mobile}.s48c-network:after{display:none}.s48c-branches{padding:28px 0 0 22px;gap:16px}.s48c-branches:before{left:8px;top:0;bottom:60px}.s48c-branches>.s48c-node:before{width:14px}.s48c-management{grid-template-columns:1fr;gap:12px}.s48-surveillance-cn .s48c-scheme{margin-top:24px!important}.s48c-scenes{grid-template-columns:1fr;gap:22px}.s48c-services article{grid-template-columns:28px 1fr;gap:16px;padding:24px 0}.s48c-contact .s48c-button{justify-self:start}.s48c-faq summary{font-size:18px}.s48c-deliverables li{padding:18px}.s48c-hero-image{object-position:66% 82%}@keyframes s48c-flow-mobile{to{transform:translateY(400%)}}}
.s48-surveillance-cn h2{font-size:clamp(34px,4.1vw,64px);font-weight:500;letter-spacing:-.052em;line-height:1.12}.s48-surveillance-cn .s48c-eyebrow:before{content:"";display:inline-block;width:7px;height:7px;background:var(--accent);border-radius:50%;margin-right:10px;box-shadow:0 0 0 4px #15313b}
@media(max-width:700px){.s48-surveillance-cn h2{font-size:34px}}
@media(prefers-reduced-motion:reduce){.s48-surveillance-cn *,.s48-surveillance-cn *:before{animation:none!important;scroll-behavior:auto!important}}

/* Commercial content hierarchy: service scope and handoff remain primary content. */
.s48c-hero{min-height:100svh;align-items:flex-end}
.s48c-hero-inner{width:min(1600px,calc(100% - 120px));margin:0 auto;padding:130px 0 76px}
.s48c-hero-copy{max-width:900px}
.s48c-hero-image{object-position:center}
.s48c-hero:after{background:linear-gradient(90deg,rgba(5,8,13,.97),rgba(5,8,13,.79) 48%,rgba(5,8,13,.28)),linear-gradient(0deg,#05080d,transparent 65%)}
.s48-surveillance-cn .s48c-service-promise{font-size:26px;font-weight:600;line-height:1.5;color:#78d7e2;margin:24px 0!important}
.s48-surveillance-cn .s48c-services h3{font-size:30px;font-weight:650;line-height:1.4}
.s48-surveillance-cn .s48c-services p,.s48-surveillance-cn .s48c-deliverables li{font-size:17px;line-height:1.85;color:#d0dce3}
.s48c-services article{padding:36px 0}
.s48c-services article>span{font-size:16px;padding-top:8px}
.s48-surveillance-cn .s48c-commercial h2{font-size:clamp(40px,4.1vw,64px);font-weight:650}
.s48-surveillance-cn .s48c-commercial header>p:not(.s48c-eyebrow),.s48-surveillance-cn .s48c-commercial header>div+p{font-size:17px;color:#d0dce3}
@media(max-width:700px){
.s48c-hero{min-height:0}
.s48c-hero-inner{width:calc(100% - 40px);padding:145px 0 60px}
.s48c-hero-image{object-position:60% center}
.s48-surveillance-cn .s48c-commercial h2{font-size:34px}
.s48-surveillance-cn .s48c-service-promise{font-size:22px}
.s48-surveillance-cn .s48c-services h3{font-size:24px}
.s48-surveillance-cn .s48c-services p,.s48-surveillance-cn .s48c-deliverables li,.s48-surveillance-cn .s48c-commercial header>p:not(.s48c-eyebrow),.s48-surveillance-cn .s48c-commercial header>div+p{font-size:17px}
.s48c-services article{padding:28px 0}
}

/* Product-led chapters; scoped to this independent page. */
.s48-surveillance-cn .s48c-editorial-head{max-width:960px;margin-bottom:40px}
.s48-surveillance-cn .s48c-editorial-head h2{margin-bottom:26px}
.s48-surveillance-cn .s48c-product-story p,.s48-surveillance-cn .s48c-project-support p,.s48-surveillance-cn .s48c-project-support li{font-size:17px;line-height:1.85;color:#b8cbd2}
.s48-surveillance-cn .s48c-product-story h3,.s48-surveillance-cn .s48c-project-support h3{font-size:23px;line-height:1.45;font-weight:600;color:#edf3f8;margin:0 0 14px}
.s48-surveillance-cn .s48c-editorial-feature{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:52px;align-items:start}
.s48-surveillance-cn .s48c-editorial-copy article+article{margin-top:32px}
.s48-surveillance-cn .s48c-editorial-photo{margin:0!important;min-width:0}
.s48-surveillance-cn .s48c-editorial-photo img{display:block;width:100%;height:auto;max-height:520px;object-fit:contain;background:#09131b}
.s48-surveillance-cn .s48c-editorial-photo figcaption{font-size:12px;line-height:1.75;color:#91a8b7;padding-top:14px}
.s48-surveillance-cn .s48c-editorial-follow{margin-top:64px;padding-top:48px;border-top:1px solid #304654}
.s48-surveillance-cn .s48c-editorial-follow>h2{font-size:clamp(28px,3vw,42px);line-height:1.35;margin-bottom:32px}
.s48-surveillance-cn .s48c-editorial-context{margin-top:48px;padding:32px;background:#0b1924}
.s48-surveillance-cn .s48c-editorial-context>h3{margin-bottom:24px}
.s48-surveillance-cn .s48c-project-support{background:#09141d;border-top:1px solid #304654}
.s48-surveillance-cn .s48c-project-support h2{font-size:clamp(28px,2.8vw,38px);line-height:1.35;margin-bottom:20px}
.s48-surveillance-cn .s48c-project-support>div>p{max-width:960px;margin-bottom:28px}
.s48-surveillance-cn .s48c-support-detail{border-top:1px solid #304654;padding:0}
.s48-surveillance-cn .s48c-support-detail summary{padding:22px 0;min-height:48px;font-size:18px;line-height:1.6;color:#dcecf2;cursor:pointer}
.s48-surveillance-cn .s48c-support-detail summary:focus-visible{outline:2px solid #65c4d0;outline-offset:4px}
.s48-surveillance-cn .s48c-support-detail>ul{padding:0 0 20px 22px;margin:0;list-style:disc;background:transparent;border:0}
.s48-surveillance-cn .s48c-support-detail>ul li{padding:8px 0;border:0}
.s48-surveillance-cn .s48c-support-detail article,.s48-surveillance-cn .s48c-support-detail .s48c-service-row{padding:24px 0}
.s48-surveillance-cn .s48c-editorial-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.s48-surveillance-cn .s48c-editorial-steps article{border-top:2px solid #478495;padding:24px 0}
.s48-surveillance-cn .s48c-editorial-steps span{display:block;font:14px monospace;color:#65c4d0;margin-bottom:18px}
@media(max-width:760px){
.s48-surveillance-cn .s48c-editorial-feature,.s48-surveillance-cn .s48c-editorial-compare,.s48-surveillance-cn .s48c-editorial-steps,.s48-surveillance-cn .s48c-editorial-layers article{grid-template-columns:1fr;gap:24px}
.s48-surveillance-cn .s48c-editorial-context{padding:24px 18px}
.s48-surveillance-cn .s48c-editorial-follow{margin-top:40px;padding-top:32px}
.s48-surveillance-cn .s48c-editorial-table table{font-size:16px}
.s48-surveillance-cn .s48c-editorial-table th,.s48-surveillance-cn .s48c-editorial-table td{padding:16px 10px}
.s48-surveillance-cn .s48c-product-story h3,.s48-surveillance-cn .s48c-project-support h3{font-size:21px}
.s48-surveillance-cn .s48c-editorial-photo img{max-height:420px}
}