/* roulang page: index */
:root{--ink:#171B1D;--muted:#657075;--paper:#FBFAF6;--surface:#F3F0E8;--line:#D7D5CC;--signal:#B8D94A;--orange:#F28A45;--teal:#397F7A;--shadow:0 16px 40px rgba(23,27,29,.08);--radius:16px}
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/* roulang page: category1 */
:root{--ink:#171B1D;--muted:#657075;--paper:#FBFAF6;--surface:#F3F0E8;--line:#D7D5CC;--signal:#B8D94A;--orange:#F28A45;--teal:#397F7A;--shadow:0 16px 40px rgba(23,27,29,.08);--radius:16px}
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var(--signal);padding-bottom:3px}.architecture{background:var(--ink);color:#fff}.architecture .section-head p{color:#c0c8c2}.arch-map{display:grid;grid-template-columns:1fr 80px 1fr 80px 1fr;align-items:stretch}.arch-col{padding:24px;background:#26302e;border:1px solid rgba(255,255,255,.14)}.arch-col:nth-child(3){background:#34443e}.arch-col h3{margin:0 0 15px;font-size:18px}.arch-col ul{padding:0;margin:0;list-style:none}.arch-col li{padding:8px 0;border-top:1px solid rgba(255,255,255,.12);font-size:14px;color:#e0e5df}.arrow{display:flex;justify-content:center;align-items:center;color:var(--signal);font-size:28px}.scene-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:stretch}.scene-image{min-height:360px;position:relative;overflow:hidden}.scene-image img{width:100%;height:100%}.scene-caption{position:absolute;left:20px;right:20px;bottom:20px;background:rgba(23,27,29,.9);padding:18px;color:#fff}.scene-caption strong{display:block;font-size:18px}.scene-caption span{font-size:13px;color:#d9e3d8}.scene-list{display:grid;gap:12px}.scene-row{padding:18px 20px;border-left:4px solid var(--teal);background:var(--surface)}.scene-row:nth-child(2){border-color:var(--orange)}.scene-row:nth-child(3){border-color:var(--signal)}.scene-row h3{font-size:17px;margin:0 0 5px}.scene-row p{margin:0;color:var(--muted);font-size:14px}.verify{background:var(--surface)}.verify-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:20px}.verify-card{padding:28px}.verify-card h3{font-size:23px;margin:0 0 15px}.tech-table{width:100%;border-collapse:collapse;font-size:14px}.tech-table td{padding:12px 0;border-bottom:1px solid var(--line);vertical-align:top}.tech-table td:first-child{width:34%;font-weight:800}.metric-stack{display:grid;gap:12px}.metric{background:var(--ink);color:#fff;padding:22px}.metric strong{display:block;font-size:30px;color:var(--signal);line-height:1.15}.metric span{font-size:13px;color:#d3dbd4}.faq{background:var(--paper)}.faq-list{max-width:880px;margin:auto}.faq-item{margin-bottom:10px}.faq-q{width:100%;min-height:64px;background:#fff;padding:18px 21px;display:flex;justify-content:space-between;align-items:center;text-align:left;font-weight:900;color:var(--ink)}.faq-q span{font-size:23px;color:var(--teal);transition:.2s}.faq-q[aria-expanded="true"] span{transform:rotate(45deg);color:var(--orange)}.faq-a{display:none;padding:0 21px 20px;color:var(--muted);font-size:14px}.faq-a.open{display:block}.contact{padding:85px 0;background:linear-gradient(110deg,#dce9a2 0%,#b8d94a 52%,#89aaa0 100%)}.contact-grid{display:grid;grid-template-columns:1fr .9fr;gap:50px;align-items:start}.contact h2{font-size:clamp(30px,4vw,48px);line-height:1.2;letter-spacing:-.05em;margin:8px 0 16px}.contact p{max-width:550px;margin:0;color:#33413d}.contact-form{background:var(--paper);padding:24px;border:1px solid rgba(23,27,29,.2);box-shadow:var(--shadow)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.field{margin-bottom:13px}.field label{display:block;font-size:13px;font-weight:800;margin-bottom:5px}.field input,.field textarea{width:100%;border:1px solid var(--line);background:#fff;padding:11px 12px;border-radius:6px;color:var(--ink)}.field textarea{height:84px;resize:vertical}.field input:invalid:not(:placeholder-shown){border-color:#be553f}.privacy{font-size:12px;line-height:1.65;color:var(--muted);margin:0 0 12px}.form-status{display:none;margin-top:12px;padding:8px 10px;background:#e6f1c3;color:#304115;font-size:13px}.footer{padding:62px 0 22px;background:var(--ink);color:#d9e0d9}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:35px}.footer .logo{color:#fff}.footer p{font-size:13px;color:#aeb9b0;margin:8px 0}.footer h3{font-size:14px;color:var(--signal);margin:0 0 14px}.footer a{display:block;font-size:13px;margin:8px 0;color:#d9e0d9}.footer a:hover{color:var(--signal)}.copyright{border-top:1px solid rgba(255,255,255,.16);margin-top:38px;padding-top:18px;display:flex;gap:18px;flex-wrap:wrap;font-size:12px;color:#98a59c}
@media(max-width:1024px){.navlinks{gap:15px;font-size:13px}.scope-grid,.verify-grid{grid-template-columns:1fr}.arch-map{grid-template-columns:1fr;gap:8px}.arrow{height:34px;transform:rotate(90deg)}}
@media(max-width:768px){.container{width:min(100% - 30px,1180px)}.topbar{display:none}.nav-inner{height:68px}.menu-btn{display:block}.navlinks{display:none;position:absolute;top:68px;left:0;right:0;background:var(--paper);padding:16px 20px 24px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:4px}.navlinks.open{display:flex}.navlinks a{padding:12px 0}.nav-cta{text-align:center;margin-top:8px}.section{padding:65px 0}.section-head{display:block;margin-bottom:27px}.section-head p{margin-top:14px}.page-head{padding:49px 0}.page-head:after{font-size:110px}.item-card{grid-template-columns:55px 1fr;gap:13px;padding:21px 0}.item-side{grid-column:2;align-items:flex-start}.item-card:hover{padding-left:8px;padding-right:8px}.scene-layout,.contact-grid{grid-template-columns:1fr}.scene-image{min-height:270px}.footer-grid{grid-template-columns:1fr 1fr}.form-row{grid-template-columns:1fr}}
@media(max-width:520px){.page-head h1{font-size:38px}.intro-panel,.scope-card,.verify-card{padding:21px}.item-card h3{font-size:18px}.footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin:5px 0}.contact{padding:62px 0}.btn{width:100%}}

/* roulang page: category3 */
:root{--ink:#171B1D;--muted:#657075;--paper:#FBFAF6;--surface:#F3F0E8;--line:#D7D5CC;--signal:#B8D94A;--orange:#F28A45;--teal:#397F7A;--shadow:0 16px 40px rgba(23,27,29,.08);--radius:16px}
        *{box-sizing:border-box}
        html{scroll-behavior:smooth;scroll-padding-top:126px}
        body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Noto Sans SC","Microsoft YaHei",sans-serif;line-height:1.8}
        a{text-decoration:none;color:inherit}
        img{display:block;max-width:100%;object-fit:cover}
        button,input,textarea{font:inherit}
        button{cursor:pointer;border:0}
        button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--orange);outline-offset:3px}
        .container{width:min(1180px,calc(100% - 40px));margin:auto}
        .topbar{background:var(--ink);color:#dce1d9;font-size:13px}
        .topbar-inner{height:42px;display:flex;align-items:center;justify-content:space-between}
        .toplinks{display:flex;gap:24px}.toplinks a:hover{color:var(--signal)}
        .mainnav{background:rgba(251,250,246,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
        .nav-inner{height:82px;display:flex;align-items:center;justify-content:space-between}
        .logo{font-size:20px;font-weight:900;letter-spacing:-.04em;white-space:nowrap}
        .logo i{display:inline-block;width:10px;height:10px;background:var(--signal);margin-right:8px;transform:skew(-20deg)}
        .logo small{font-size:11px;color:var(--muted);font-weight:700;margin-left:5px}
        .navlinks{display:flex;align-items:center;gap:25px;font-size:14px;font-weight:700}
        .navlinks a{padding:10px 0;border-bottom:2px solid transparent}
        .navlinks a:hover,.navlinks a.active{border-color:var(--signal);color:var(--teal)}
        .nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;padding:0 21px;border-radius:8px;font-weight:800;transition:.25s ease}
        .nav-cta,.btn-primary{background:var(--signal);color:var(--ink)!important;border:0!important}
        .nav-cta:hover,.btn-primary:hover{background:#d0ec65;transform:translateY(-2px)}
        .btn-dark{background:var(--ink);color:#fff}.btn-dark:hover{background:var(--teal);transform:translateY(-2px)}
        .btn-outline{border:1px solid var(--ink);color:var(--ink)}.btn-outline:hover{background:var(--ink);color:#fff}
        .menu-btn{display:none;background:none;font-size:25px;min-width:44px;min-height:44px}
        .page-banner{position:relative;min-height:370px;display:flex;align-items:center;color:#fff;background:linear-gradient(90deg,rgba(20,27,27,.94),rgba(20,27,27,.58)),url('/assets/images/backpic/back-4.webp') center/cover}
        .page-banner:after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(184,217,74,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(184,217,74,.08) 1px,transparent 1px);background-size:58px 58px;pointer-events:none}
        .banner-content{position:relative;z-index:1;padding:70px 0}
        .crumb{font-size:13px;color:#c4d0c4;margin-bottom:25px}.crumb a:hover{color:var(--signal)}
        .eyebrow{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);font-weight:800}
        .page-banner .eyebrow{color:var(--signal)}
        h1,h2,h3{letter-spacing:-.04em}
        .page-banner h1{font-size:clamp(36px,5vw,64px);line-height:1.12;max-width:800px;margin:0 0 18px}
        .page-banner p{font-size:18px;color:#e4ebe2;max-width:720px;margin:0}
        .section{padding:92px 0}.section-head{display:flex;justify-content:space-between;gap:32px;align-items:end;margin-bottom:40px}
        .section-head h2{font-size:clamp(28px,4vw,44px);line-height:1.2;margin:8px 0 0}
        .section-head p{max-width:560px;color:var(--muted);margin:0}
        .scope-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:55px;align-items:center}
        .scope-image{min-height:350px;position:relative;padding:18px;background:var(--surface);border:1px solid var(--line)}
        .scope-image img{width:100%;height:314px}
        .scope-note{position:absolute;right:-18px;bottom:24px;background:var(--signal);padding:13px 17px;font-weight:800;font-size:13px;box-shadow:var(--shadow)}
        .check-list{list-style:none;margin:25px 0 0;padding:0;display:grid;gap:14px}
        .check-list li{display:flex;gap:12px;align-items:flex-start;border-bottom:1px solid var(--line);padding-bottom:14px}
        .check-list b{color:var(--teal);font-size:13px;min-width:56px}
        .tag{font-size:12px;padding:4px 9px;border:1px solid var(--line);border-radius:99px;color:var(--teal);background:#fff}
        .tags{display:flex;gap:7px;flex-wrap:wrap;margin:15px 0}
        .test-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
        .test-item{display:grid;grid-template-columns:70px 1fr;gap:18px;background:#fff;border:1px solid var(--line);padding:25px;transition:.25s}
        .test-item:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--teal)}
        .test-no{font-size:30px;color:var(--orange);font-weight:900;line-height:1}
        .test-item h3{font-size:21px;margin:0 0 7px}.test-item p{color:var(--muted);font-size:14px;margin:0}
        .test-item a{display:inline-block;color:var(--teal);font-size:13px;font-weight:800;margin-top:12px}
        .architecture{background:var(--surface)}
        .relation{display:grid;grid-template-columns:.75fr 1.25fr;gap:20px;align-items:stretch}
        .relation-intro{background:var(--ink);color:#fff;padding:35px}.relation-intro p{color:#c3cec5}
        .pipeline{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);background:var(--paper)}
        .pipeline div{padding:25px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
        .pipeline div:nth-child(3n){border-right:0}.pipeline strong{display:block;color:var(--orange);font-size:13px;margin-bottom:8px}.pipeline h3{font-size:18px;margin:0 0 5px}.pipeline p{font-size:13px;color:var(--muted);margin:0}
        .scene-layout{display:grid;grid-template-columns:270px 1fr;gap:38px}
        .scene-menu{display:flex;flex-direction:column;gap:8px}.scene-menu span{padding:15px 18px;border-left:3px solid var(--line);font-weight:800;background:var(--surface)}.scene-menu span:first-child{border-color:var(--signal);background:#e8eee2}
        .scene-panel{display:grid;grid-template-columns:1fr 1fr;gap:18px}.scene-card{padding:26px;background:#fff;border:1px solid var(--line)}.scene-card:nth-child(2){background:#e8eee2}.scene-card h3{font-size:21px;margin:0 0 8px}.scene-card p{font-size:14px;color:var(--muted);margin:0}
        .evidence{background:#252e2d;color:#fff}.evidence .section-head p{color:#bac7bd}.evidence-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.evidence-card{border:1px solid #53605a;padding:28px}.evidence-card h3{margin:0 0 16px;font-size:21px;color:var(--signal)}.evidence-card p{color:#c5d0c7;font-size:14px;margin:0}.data-line{display:flex;justify-content:space-between;border-bottom:1px solid #53605a;padding:10px 0;color:#dce5dc;font-size:14px}.data-line span{color:#aab6ae}
        .faq{background:var(--surface)}.faq-list{max-width:850px;margin:auto}.faq-item{border-bottom:1px solid var(--line);background:#fff;margin-bottom:8px}.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;text-align:left;padding:19px 22px;background:#fff;font-weight:800;color:var(--ink);min-height:58px}.faq-q:hover{color:var(--teal)}.faq-q span:last-child{font-size:22px;color:var(--orange);transition:.25s}.faq-a{display:none;padding:0 22px 20px;color:var(--muted);font-size:14px}.faq-item.open .faq-a{display:block}.faq-item.open .faq-q span:last-child{transform:rotate(45deg)}
        .cta{padding:70px 0;background:var(--signal)}.cta-inner{display:flex;justify-content:space-between;align-items:center;gap:30px}.cta h2{font-size:clamp(28px,4vw,48px);line-height:1.2;margin:8px 0}.cta p{max-width:620px;margin:0;color:#36402b}.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
        .footer{background:var(--ink);color:#dce3dc;padding:62px 0 25px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:35px}.footer .logo{color:#fff}.footer p{color:#aebbb2;font-size:13px;margin:12px 0}.footer h3{font-size:15px;color:var(--signal);margin:0 0 15px}.footer a{display:block;color:#c7d0ca;font-size:13px;margin:8px 0}.footer a:hover{color:var(--signal)}.copyright{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;border-top:1px solid #3d4843;margin-top:45px;padding-top:20px;color:#8f9d94;font-size:12px}
        @media(max-width:1024px){.navlinks{gap:14px}.scope-grid,.relation{gap:28px}.footer-grid{grid-template-columns:repeat(2,1fr)}}
        @media(max-width:768px){.container{width:min(100% - 32px,600px)}.toplinks a:not(:first-child){display:none}.nav-inner{height:70px}.menu-btn{display:block}.navlinks{display:none;position:absolute;top:70px;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);padding:12px 20px 22px;flex-direction:column;align-items:stretch;gap:0;box-shadow:var(--shadow)}.navlinks.show{display:flex}.navlinks a{padding:13px 0}.nav-cta{margin-top:8px;text-align:center}.page-banner{min-height:330px}.banner-content{padding:55px 0}.section{padding:68px 0}.section-head{display:block;margin-bottom:28px}.section-head p{margin-top:14px}.scope-grid,.relation,.scene-layout,.evidence-grid{grid-template-columns:1fr}.test-list,.scene-panel{grid-template-columns:1fr}.pipeline{grid-template-columns:1fr}.pipeline div,.pipeline div:nth-child(3n){border-right:0}.cta-inner{display:block}.cta-actions{margin-top:24px}.footer-grid{grid-template-columns:1fr 1fr}}
        @media(max-width:520px){.topbar-inner{height:38px}.topbar strong{font-size:12px}.logo{font-size:17px}.logo small{display:none}.page-banner h1{font-size:36px}.page-banner p{font-size:16px}.test-item{grid-template-columns:48px 1fr;padding:20px}.test-no{font-size:24px}.footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin:5px 0}.scope-note{right:10px}.cta-actions .btn{width:100%}}
        @media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}

/* roulang page: category4 */
:root{--ink:#171B1D;--muted:#657075;--paper:#FBFAF6;--surface:#F3F0E8;--line:#D7D5CC;--signal:#B8D94A;--orange:#F28A45;--teal:#397F7A;--shadow:0 16px 40px rgba(23,27,29,.08);--radius:16px}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;scroll-padding-top:126px}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Noto Sans SC","Microsoft YaHei",sans-serif;line-height:1.8}
    a{text-decoration:none;color:inherit}
    img{display:block;max-width:100%;object-fit:cover}
    button,input,textarea{font:inherit}
    button{cursor:pointer;border:0}
    button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--orange);outline-offset:3px}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:var(--ink);color:#dce1d9;font-size:13px}
    .topbar-inner{height:42px;display:flex;align-items:center;justify-content:space-between}
    .toplinks{display:flex;gap:24px}
    .toplinks a:hover{color:var(--signal)}
    .mainnav{background:rgba(251,250,246,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .nav-inner{height:82px;display:flex;align-items:center;justify-content:space-between}
    .logo{font-size:20px;font-weight:900;letter-spacing:-.04em;white-space:nowrap}
    .logo i{display:inline-block;width:10px;height:10px;background:var(--signal);margin-right:8px;transform:skew(-20deg)}
    .logo small{font-size:12px;color:var(--muted);font-weight:700;margin-left:5px;letter-spacing:0}
    .navlinks{display:flex;align-items:center;gap:25px;font-size:14px;font-weight:700}
    .navlinks a{padding:10px 0;border-bottom:2px solid transparent}
    .navlinks a:hover,.navlinks a.active{border-color:var(--signal);color:var(--teal)}
    .navlinks .nav-cta{border:0}
    .nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;padding:0 21px;border-radius:8px;font-weight:800;transition:.25s ease}
    .nav-cta,.btn-primary{background:var(--signal);color:var(--ink)}
    .nav-cta:hover,.btn-primary:hover{background:#d0ec65;transform:translateY(-2px)}
    .btn-dark{background:var(--ink);color:#fff}
    .btn-dark:hover{background:var(--teal);transform:translateY(-2px)}
    .btn-outline{border:1px solid var(--ink);color:var(--ink)}
    .btn-outline:hover{background:var(--ink);color:#fff}
    .menu-btn{display:none;background:none;font-size:25px;min-width:44px;min-height:44px}
    .page-head{padding:78px 0 72px;background:var(--surface);border-bottom:1px solid var(--line);position:relative;overflow:hidden}
    .page-head:after{content:"";position:absolute;right:-80px;bottom:-120px;width:430px;height:300px;border:1px solid #c9cec0;transform:rotate(-17deg);border-radius:50%}
    .eyebrow{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);font-weight:800}
    .breadcrumb{font-size:13px;color:var(--muted);margin-bottom:30px}
    .breadcrumb a:hover{color:var(--teal)}
    .page-head h1{font-size:clamp(38px,6vw,70px);line-height:1.1;letter-spacing:-.065em;margin:0 0 20px;max-width:820px}
    .page-head p{max-width:720px;color:var(--muted);font-size:17px;margin:0}
    .section{padding:92px 0}
    .section-head{display:flex;justify-content:space-between;gap:32px;align-items:end;margin-bottom:38px}
    .section-head h2{font-size:clamp(28px,4vw,44px);line-height:1.2;margin:8px 0 0;letter-spacing:-.04em}
    .section-head p{max-width:550px;color:var(--muted);margin:0}
    .scope-grid{display:grid;grid-template-columns:1fr 1.5fr;gap:24px;align-items:stretch}
    .scope-panel{padding:34px;background:var(--ink);color:#fff;border-radius:12px}
    .scope-panel h2{font-size:30px;line-height:1.25;margin:14px 0}
    .scope-panel p{color:#c5d0c6}
    .scope-tags{display:flex;gap:9px;flex-wrap:wrap;margin-top:28px}
    .scope-tags span,.tag{font-size:12px;padding:5px 10px;border:1px solid var(--line);border-radius:99px;color:var(--teal);background:#fff}
    .scope-panel .tag{border-color:#60716b;background:transparent;color:var(--signal)}
    .scope-image{min-height:330px;border-radius:12px;overflow:hidden;position:relative}
    .scope-image img{width:100%;height:100%;min-height:330px}
    .scope-image figcaption{position:absolute;left:22px;bottom:18px;color:#fff;font-size:13px;background:rgba(23,27,29,.78);padding:7px 12px;border-left:3px solid var(--signal)}
    .case-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .case-card{display:grid;grid-template-columns:155px 1fr;min-height:210px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.25s}
    .case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b9c8a5}
    .case-card img{width:100%;height:100%;min-height:210px}
    .case-body{padding:24px}
    .case-body h3{font-size:20px;line-height:1.35;margin:12px 0 8px}
    .case-body p{font-size:14px;color:var(--muted);margin:0}
    .case-meta{font-size:12px;color:var(--orange);font-weight:800}
    .more-row{margin-top:28px;text-align:right}
    .text-link{color:var(--teal);font-weight:800;border-bottom:1px solid var(--teal);padding-bottom:3px}
    .text-link:hover{color:var(--orange);border-color:var(--orange)}
    .architecture{background:var(--surface)}
    .relation-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:35px;align-items:center}
    .relation-copy h2{font-size:35px;line-height:1.25;margin:10px 0 16px}
    .relation-copy p{color:var(--muted)}
    .flow{border:1px solid var(--line);background:var(--paper);padding:26px;position:relative}
    .flow:before{content:"";position:absolute;left:38px;top:45px;bottom:45px;border-left:2px dashed var(--teal)}
    .flow-item{display:grid;grid-template-columns:28px 1fr;gap:18px;position:relative;margin:15px 0}
    .flow-item b{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--signal);font-size:12px;z-index:1}
    .flow-item strong{display:block;margin-bottom:3px}
    .flow-item span{font-size:13px;color:var(--muted)}
    .scenes{background:#fff}
    .scene-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:18px}
    .scene-feature{min-height:330px;padding:35px;color:#fff;border-radius:12px;background:linear-gradient(135deg,rgba(23,27,29,.18),rgba(23,27,29,.88)),url('/assets/images/backpic/back-4.webp') center/cover}
    .scene-feature h3{font-size:31px;max-width:450px;line-height:1.25;margin:130px 0 8px}
    .scene-feature p{max-width:480px;color:#e7eee6}
    .scene-side{display:flex;flex-direction:column;gap:12px}
    .scene-side article{padding:22px;background:var(--surface);border-left:4px solid var(--orange);flex:1}
    .scene-side h3{margin:0 0 6px;font-size:19px}
    .scene-side p{margin:0;color:var(--muted);font-size:14px}
    .verification{background:var(--ink);color:#fff}
    .verification .section-head p{color:#bbc6bd}
    .verify-grid{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid #4b5553}
    .verify-item{padding:25px;border-right:1px solid #4b5553}
    .verify-item:last-child{border-right:0}
    .verify-item strong{display:block;color:var(--signal);font-size:29px;line-height:1.3;margin-bottom:9px}
    .verify-item span{font-size:13px;color:#c2cbc2}
    .faq{background:var(--surface)}
    .faq-list{max-width:860px;margin:auto}
    .faq-item{background:#fff;border-bottom:1px solid var(--line);margin-bottom:8px}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;text-align:left;padding:20px 22px;background:#fff;color:var(--ink);font-weight:800;min-height:64px}
    .faq-q:hover{color:var(--teal);background:#fdfdf9}
    .faq-q span:last-child{font-size:24px;color:var(--orange);transition:.2s}
    .faq-q[aria-expanded="true"] span:last-child{transform:rotate(45deg)}
    .faq-a{display:none;padding:0 22px 22px;color:var(--muted);font-size:14px}
    .faq-a.open{display:block}
    .cta{padding:82px 0;background:var(--signal)}
    .cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:start}
    .cta h2{font-size:clamp(30px,4vw,48px);line-height:1.2;letter-spacing:-.05em;margin:10px 0 16px}
    .cta p{max-width:510px;margin:0;color:#344036}
    .contact-form{background:#fff;padding:27px;border-radius:12px;box-shadow:0 12px 30px rgba(23,27,29,.1)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:6px}
    .field.full{grid-column:1/-1}
    .field label{font-size:13px;font-weight:800}
    .field input,.field textarea{width:100%;border:1px solid var(--line);padding:11px 13px;border-radius:7px;background:#fff;color:var(--ink)}
    .field textarea{min-height:105px;resize:vertical}
    .field input:invalid:not(:placeholder-shown),.field textarea:invalid:not(:placeholder-shown){border-color:var(--orange)}
    .privacy{font-size:12px;color:var(--muted);margin:13px 0}
    .footer{background:var(--ink);color:#e8eee6;padding:62px 0 25px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.15fr;gap:35px}
    .footer .logo{margin-bottom:17px}
    .footer .logo small{color:#aeb8ad}
    .footer p{color:#aeb8ad;font-size:13px;margin:5px 0}
    .footer h3{font-size:14px;color:var(--signal);margin:0 0 13px}
    .footer a{display:block;color:#c6cec5;font-size:13px;margin:7px 0}
    .footer a:hover{color:var(--signal)}
    .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #3c4644;margin-top:42px;padding-top:20px;color:#89968d;font-size:12px;flex-wrap:wrap}
    @media(max-width:1024px){.navlinks{gap:13px;font-size:13px}.scope-grid,.relation-grid{grid-template-columns:1fr 1fr}.case-card{grid-template-columns:120px 1fr}.footer-grid{grid-template-columns:repeat(2,1fr)}}
    @media(max-width:768px){.toplinks{gap:12px}.toplinks a:last-child{display:none}.nav-inner{height:70px}.menu-btn{display:block}.navlinks{display:none;position:absolute;top:70px;left:0;right:0;padding:16px 20px 24px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:4px}.navlinks.open{display:flex}.navlinks a{padding:12px 8px}.navlinks .nav-cta{text-align:center;margin-top:8px}.section{padding:68px 0}.section-head{display:block;margin-bottom:28px}.section-head p{margin-top:15px}.scope-grid,.relation-grid,.scene-grid,.cta-grid{grid-template-columns:1fr}.case-list{grid-template-columns:1fr}.verify-grid{grid-template-columns:repeat(2,1fr)}.verify-item:nth-child(2){border-right:0}.verify-item{border-bottom:1px solid #4b5553}.verify-item:nth-child(3),.verify-item:nth-child(4){border-bottom:0}.scene-feature h3{margin-top:105px}.cta-grid{gap:30px}}
    @media(max-width:520px){.container{width:min(100% - 28px,1180px)}.topbar-inner{height:38px}.topbar-inner strong{font-size:12px}.logo{font-size:17px}.logo small{display:none}.page-head{padding:52px 0 48px}.page-head h1{font-size:40px}.page-head p{font-size:15px}.case-card{display:block}.case-card img{height:180px}.case-body{padding:20px}.verify-grid{grid-template-columns:1fr}.verify-item,.verify-item:nth-child(2){border-right:0;border-bottom:1px solid #4b5553}.verify-item:last-child{border-bottom:0}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-grid>div:first-child{grid-column:1/-1}.copyright{display:block}.copyright span{display:block;margin:5px 0}}
    @media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}

/* roulang page: category2 */
:root{--ink:#171B1D;--muted:#657075;--paper:#FBFAF6;--surface:#F3F0E8;--line:#D7D5CC;--signal:#B8D94A;--orange:#F28A45;--teal:#397F7A;--shadow:0 16px 40px rgba(23,27,29,.08);--radius:16px}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;scroll-padding-top:126px}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Noto Sans SC","Microsoft YaHei",sans-serif;line-height:1.8}
    a{text-decoration:none;color:inherit}
    img{display:block;max-width:100%;object-fit:cover}
    button,input,textarea{font:inherit}
    button{cursor:pointer;border:0}
    button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--orange);outline-offset:3px}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:var(--ink);color:#dce1d9;font-size:13px}
    .topbar-inner{height:42px;display:flex;align-items:center;justify-content:space-between}
    .toplinks{display:flex;gap:24px}.toplinks a:hover{color:var(--signal)}
    .mainnav{background:rgba(251,250,246,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .nav-inner{height:82px;display:flex;align-items:center;justify-content:space-between}
    .logo{font-size:20px;font-weight:900;letter-spacing:-.04em;white-space:nowrap}
    .logo i{display:inline-block;width:10px;height:10px;background:var(--signal);margin-right:8px;transform:skew(-20deg)}
    .logo small{font-size:11px;color:var(--teal);margin-left:5px;letter-spacing:.04em}
    .navlinks{display:flex;align-items:center;gap:25px;font-size:14px;font-weight:700}
    .navlinks a{padding:10px 0;border-bottom:2px solid transparent}
    .navlinks a:hover,.navlinks a.active{border-color:var(--signal);color:var(--teal)}
    .nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;padding:0 21px;border-radius:8px;font-weight:800;transition:.25s ease}
    .nav-cta,.btn-primary{background:var(--signal);color:var(--ink)}
    .nav-cta:hover,.btn-primary:hover{background:#d0ec65;transform:translateY(-2px)}
    .btn-dark{background:var(--ink);color:white}.btn-dark:hover{background:var(--teal);transform:translateY(-2px)}
    .btn-outline{border:1px solid var(--ink);color:var(--ink)}.btn-outline:hover{background:var(--ink);color:white}
    .menu-btn{display:none;background:none;font-size:25px;min-width:44px;min-height:44px}
    .page-banner{min-height:330px;color:#fff;background:linear-gradient(90deg,rgba(18,25,25,.91),rgba(18,25,25,.55)),url('/assets/images/backpic/back-4.webp') center/cover;display:flex;align-items:center}
    .banner-content{padding:70px 0}.eyebrow{font-size:12px;letter-spacing:.16em;color:var(--signal);font-weight:800}
    .breadcrumb{font-size:13px;color:#cbd5cc;margin-bottom:25px}.breadcrumb a:hover{color:var(--signal)}
    h1{font-size:clamp(38px,6vw,68px);line-height:1.12;letter-spacing:-.06em;margin:0 0 18px;max-width:850px}
    .banner-content p{font-size:18px;color:#e3e9e1;max-width:720px;margin:0}
    .section{padding:92px 0}.section-head{margin-bottom:40px}.section-head h2{font-size:clamp(28px,4vw,44px);line-height:1.2;letter-spacing:-.04em;margin:8px 0 12px}.section-head p{color:var(--muted);max-width:680px;margin:0}
    .scope-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:64px;align-items:center}
    .scope-grid img{height:330px;width:100%;border-radius:12px}.scope-copy{font-size:16px;color:var(--muted)}
    .info-strip{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}.tag{font-size:12px;padding:5px 11px;border:1px solid var(--line);border-radius:99px;color:var(--teal);background:#fff}
    .list-section{background:var(--surface)}.software-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .software-item{background:var(--paper);border:1px solid var(--line);padding:25px;display:grid;grid-template-columns:55px 1fr;gap:16px;transition:.25s}
    .software-item:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--teal)}
    .item-no{font-size:20px;font-weight:900;color:var(--orange)}.software-item h3{margin:0 0 7px;font-size:20px}.software-item p{margin:0;color:var(--muted);font-size:14px}.item-meta{margin-top:12px;color:var(--teal);font-size:12px;font-weight:800}
    .more-row{margin-top:28px}.more-row a{color:var(--teal);font-weight:800;border-bottom:1px solid var(--teal);padding-bottom:4px}
    .architecture{display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:stretch}
    .flow-panel{background:var(--ink);color:#fff;padding:34px;border-radius:10px}.flow-panel h3{font-size:25px;margin:0 0 25px}.flow-line{display:flex;flex-direction:column;gap:16px}
    .flow-step{display:grid;grid-template-columns:45px 1fr;gap:15px;align-items:start}.flow-step b{color:var(--signal);font-size:18px}.flow-step strong{display:block}.flow-step span{font-size:13px;color:#bbc6bd}
    .compare{border:1px solid var(--line);padding:30px;background:#fff}.compare h3{margin-top:0;font-size:23px}.compare-row{display:flex;justify-content:space-between;gap:20px;padding:15px 0;border-bottom:1px solid var(--line);font-size:14px}.compare-row span:last-child{color:var(--teal);font-weight:800;text-align:right}
    .scene-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:18px}.scene{min-height:205px;padding:27px;border-left:4px solid var(--signal);background:var(--surface)}.scene:nth-child(2){border-color:var(--orange)}.scene:nth-child(3){border-color:var(--teal)}.scene h3{margin:0 0 9px;font-size:21px}.scene p{color:var(--muted);font-size:14px;margin:0}
    .evidence{background:#26312f;color:#fff}.evidence-grid{display:grid;grid-template-columns:1fr 1.35fr;gap:60px;align-items:center}.evidence p{color:#c6d0c8}.evidence-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.evidence-card{padding:22px;border:1px solid #53635b;background:#303d39}.evidence-card strong{display:block;color:var(--signal);font-size:25px}.evidence-card span{font-size:13px;color:#d0d8d0}
    .faq{background:var(--surface)}.faq-list{max-width:850px;margin:auto}.faq-item{border-bottom:1px solid var(--line);background:#fff;margin-bottom:8px}.faq-q{width:100%;display:flex;justify-content:space-between;text-align:left;align-items:center;padding:20px 24px;background:#fff;font-weight:800;color:var(--ink)}.faq-q span{font-size:22px;color:var(--teal);transition:.25s}.faq-q[aria-expanded=true] span{transform:rotate(45deg)}.faq-a{display:none;padding:0 24px 21px;color:var(--muted);font-size:14px}.faq-a.open{display:block}
    .cta{padding:80px 0;background:var(--signal)}.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}.cta h2{font-size:42px;line-height:1.2;letter-spacing:-.05em;margin:8px 0 16px}.cta p{max-width:500px}.form{background:var(--paper);padding:26px;border-radius:12px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.field{display:flex;flex-direction:column;gap:5px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:800}.field input,.field textarea{border:1px solid var(--line);background:#fff;padding:11px 13px;border-radius:7px;color:var(--ink)}.field textarea{min-height:100px;resize:vertical}.field input:invalid:not(:placeholder-shown),.field textarea:invalid:not(:placeholder-shown){border-color:var(--orange)}.privacy{font-size:12px;color:var(--muted);margin:14px 0}
    .footer{background:var(--ink);color:#e4e9e2;padding:65px 0 24px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:35px}.footer .logo{color:#fff}.footer p{color:#aeb9b0;font-size:13px;margin:10px 0}.footer h3{font-size:14px;color:var(--signal);margin:0 0 14px}.footer a{display:block;color:#c7d0c8;font-size:13px;margin:8px 0}.footer a:hover{color:var(--signal)}.copyright{border-top:1px solid #3b4541;margin-top:40px;padding-top:19px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:#9daaa1;font-size:12px}
    @media(max-width:1024px){.navlinks{gap:14px}.scope-grid,.architecture,.evidence-grid{gap:32px}.container{width:min(100% - 32px,1180px)}}
    @media(max-width:768px){.toplinks{gap:10px}.toplinks a:first-child{display:none}.nav-inner{height:70px}.menu-btn{display:block}.navlinks{display:none;position:absolute;left:16px;right:16px;top:70px;background:var(--paper);padding:15px 20px 22px;box-shadow:var(--shadow);border:1px solid var(--line);flex-direction:column;align-items:stretch;gap:4px}.navlinks.open{display:flex}.navlinks a{padding:12px 5px}.nav-cta{text-align:center;margin-top:6px}.section{padding:68px 0}.scope-grid,.architecture,.evidence-grid,.cta-grid{grid-template-columns:1fr}.software-list,.scene-grid{grid-template-columns:1fr}.evidence-list{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.cta h2{font-size:34px}}
    @media(max-width:520px){.container{width:calc(100% - 28px)}.topbar-inner{height:38px}.topbar strong{font-size:12px}.logo{font-size:17px}.logo small{font-size:10px}.page-banner{min-height:300px}.banner-content{padding:55px 0}.banner-content p{font-size:16px}.evidence-list,.form-grid,.footer-grid{grid-template-columns:1fr}.software-item{grid-template-columns:38px 1fr;padding:20px}.section-head h2{font-size:30px}.copyright{display:block}.copyright span{display:block;margin:5px 0}}
    @media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}