/* roulang page: index */
:root{
            --ink:#171b1d;--graphite:#202628;--deep:#111719;--paper:#f5f5f1;
            --warm:#ebe9e2;--copper:#c66a3d;--copper-dark:#9d4d2c;--teal:#6c8581;
            --muted:#697372;--line:#d9ddd7;--white:#fff;--radius:14px;
            --shadow:0 16px 38px rgba(22,29,29,.09);--max:1240px;--space:104px;
        }
        *,*::before,*::after{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;font-size:15px}
        img{display:block;max-width:100%;height:auto}
        a{color:inherit;text-decoration:none;transition:.25s ease}
        button,input,textarea{font:inherit}
        .container{max-width:var(--max);padding-left:24px;padding-right:24px}
        .topbar{background:var(--deep);color:#aebbb7;font-size:12px;letter-spacing:.04em}
        .topbar .inner{min-height:34px;display:flex;align-items:center;justify-content:space-between}
        .topbar strong{color:#e3e8e2;font-weight:500}
        .main-nav{background:rgba(17,23,25,.97);color:#e9ede8;border-bottom:1px solid rgba(255,255,255,.1);position:sticky;top:0;z-index:20}
        .navbar{min-height:76px;padding:0}
        .brand{font-weight:800;font-size:20px;letter-spacing:-.04em;white-space:nowrap}
        .brand em{font-style:normal;color:var(--copper)}
        .brand small{display:block;color:#81918c;font-size:10px;font-weight:400;letter-spacing:.12em;line-height:1}
        .navbar-nav{gap:8px}.nav-link{color:#b9c4bf!important;padding:27px 13px!important;font-size:14px;position:relative}
        .nav-link:hover,.nav-link.active{color:#fff!important}.nav-link.active:after{content:"";position:absolute;left:13px;right:13px;bottom:17px;height:2px;background:var(--copper)}
        .navbar-toggler{border:1px solid #687773;padding:9px}.navbar-toggler:focus{box-shadow:0 0 0 3px rgba(198,106,61,.28)}
        .nav-cta,.btn-copper{background:var(--copper);color:#fff;border:1px solid var(--copper);padding:11px 20px;border-radius:7px;font-weight:600;display:inline-block}
        .nav-cta:hover,.btn-copper:hover{background:var(--copper-dark);border-color:var(--copper-dark);color:#fff;transform:translateY(-2px)}
        .btn-outline-light{border:1px solid rgba(255,255,255,.5);color:#fff;padding:11px 20px;border-radius:7px}
        .btn-outline-light:hover{background:#fff;color:var(--deep)}
        a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(198,106,61,.45);outline-offset:3px}
        .hero{min-height:620px;background:linear-gradient(90deg,rgba(12,19,20,.9) 0%,rgba(12,19,20,.64) 48%,rgba(12,19,20,.2)),url('/assets/images/backpic/back-1.webp') center/cover;position:relative;color:#fff;display:flex;align-items:center}
        .hero:after{content:"";position:absolute;inset:auto 0 0;height:90px;background:linear-gradient(transparent,var(--paper))}
        .hero-content{position:relative;z-index:1;max-width:760px;padding:90px 0 125px}
        .eyebrow,.section-kicker{color:var(--copper);font-size:12px;letter-spacing:.16em;font-weight:700;text-transform:uppercase}
        h1{font-size:clamp(38px,5vw,68px);line-height:1.16;letter-spacing:-.055em;margin:18px 0 23px;font-weight:800}
        .hero p{font-size:18px;line-height:1.9;color:#dbe1dc;max-width:720px;margin-bottom:31px}
        .hero-actions{display:flex;gap:13px;flex-wrap:wrap}
        .hero-index{position:absolute;right:3%;bottom:105px;z-index:2;color:#d7dfd9;font-family:Georgia,serif;font-size:38px}.hero-index span{color:var(--copper)}
        section{padding:var(--space) 0}.section-head{max-width:760px;margin-bottom:42px}.section-head h2{font-size:clamp(27px,3.4vw,43px);line-height:1.25;letter-spacing:-.04em;margin:10px 0 15px}.section-head p{color:var(--muted);margin:0;font-size:16px}
        .pain{background:#e9ebe5;padding-top:55px;padding-bottom:55px}.pain-list{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid #bfc8c0;border-bottom:1px solid #bfc8c0}
        .pain-item{padding:24px 18px 22px;border-right:1px solid #cbd1ca}.pain-item:last-child{border-right:0}.num{color:var(--copper);font-family:Georgia,serif;font-size:25px}.pain-item h3{font-size:16px;margin:7px 0}.pain-item p{font-size:13px;color:var(--muted);line-height:1.65;margin:0}
        .intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center}.image-frame{position:relative}.image-frame img{width:100%;aspect-ratio:1.08;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow)}.image-frame:before{content:"";position:absolute;width:120px;height:120px;border:1px solid var(--copper);left:-18px;bottom:-18px;z-index:-1}
        .spec-box{border-left:3px solid var(--copper);padding:18px 22px;background:#fff;margin-top:26px}.spec-box strong{display:block;font-size:25px}.spec-box span{color:var(--muted);font-size:13px}
        .process{background:#fff}.process-track{display:grid;grid-template-columns:repeat(5,1fr);gap:0}.step{position:relative;padding:25px 22px 12px 0;border-top:2px solid var(--line)}.step:before{content:"";position:absolute;top:-8px;left:0;width:14px;height:14px;border-radius:50%;background:var(--copper);border:4px solid #fff;box-shadow:0 0 0 1px var(--copper)}.step:not(:last-child){margin-right:28px}.step h3{font-size:17px;margin:16px 0 7px}.step p{color:var(--muted);font-size:13px;margin:0}
        .advantage{background:var(--warm)}.adv-grid{display:grid;grid-template-columns:1.1fr .9fr 1.1fr;gap:16px}.adv-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;min-height:178px;transition:.25s}.adv-card:nth-child(2),.adv-card:nth-child(5){background:var(--graphite);color:#fff}.adv-card:hover{border-color:var(--copper);transform:translateY(-4px);box-shadow:var(--shadow)}.adv-card h3{font-size:18px;margin:15px 0 7px}.adv-card p{font-size:13px;color:var(--muted);margin:0;line-height:1.65}.adv-card:nth-child(2) p,.adv-card:nth-child(5) p{color:#bdc8c3}.tech-tag,.badge-tech{display:inline-block;color:var(--teal);border:1px solid #a9bab5;border-radius:4px;padding:2px 8px;font-size:11px}.adv-card:nth-child(2) .tech-tag,.adv-card:nth-child(5) .tech-tag{color:#e8a077;border-color:#92563d}
        .products{background:#f8f8f5}.product-grid{display:grid;grid-template-columns:1.25fr .9fr .9fr;gap:18px}.product-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}.product-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--copper)}.product-card img{width:100%;height:210px;object-fit:cover}.product-card:first-child img{height:270px}.product-body{padding:23px}.product-code{color:var(--copper);font:700 12px Georgia,serif}.product-card h3{font-size:20px;margin:9px 0}.product-card p{font-size:13px;color:var(--muted);margin:0 0 18px}
        .dark-case{background:var(--graphite);color:#fff;position:relative;overflow:hidden}.dark-case:before{content:"";position:absolute;inset:0;background:linear-gradient(110deg,transparent 30%,rgba(108,133,129,.12)),url('/assets/images/backpic/back-4.webp') center/cover;opacity:.35}.case-inner{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}.dark-case .section-kicker{color:#e18a60}.dark-case h2{font-size:clamp(28px,3vw,42px);line-height:1.3;margin:12px 0 20px}.dark-case p{color:#c0cbc6}.case-points{border-left:1px solid #667570;padding-left:30px}.case-point{padding:17px 0;border-bottom:1px solid #3f4b49}.case-point strong{display:block;color:#f1b18f;font-size:26px;font-family:Georgia,serif}.case-point span{color:#c1cbc5;font-size:14px}
        .story{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;align-items:start}.story-visual{background:var(--teal);color:#fff;border-radius:var(--radius);padding:38px;min-height:300px}.story-visual small{color:#d3e2de}.story-visual h3{font-size:27px;line-height:1.35;margin-top:35px}.story-copy blockquote{font-size:25px;line-height:1.55;margin:0 0 25px;letter-spacing:-.03em}.story-copy p{color:var(--muted)}
        .metrics{padding:45px 0;background:#dfe5df}.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:25px}.metric{border-left:2px solid var(--copper);padding-left:20px}.metric strong{font:700 39px Georgia,serif;color:var(--graphite);display:block}.metric span{font-size:13px;color:var(--muted)}
        .quote-section{background:#fff}.quote-box{max-width:900px;margin:auto;text-align:center}.quote-box blockquote{font-size:clamp(22px,3vw,34px);line-height:1.55;margin:0 0 18px}.quote-box cite{font-style:normal;color:var(--copper);font-size:14px}
        .audience{background:#eef0eb}.audience-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#cbd3cc;border:1px solid #cbd3cc}.audience-item{background:#eef0eb;padding:26px 22px;min-height:150px}.audience-item h3{font-size:17px;margin:0 0 9px}.audience-item p{font-size:13px;color:var(--muted);margin:0}
        .news{background:#fff}.news-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:24px}.news-list{border-top:1px solid var(--line)}.news-row{display:grid;grid-template-columns:95px 1fr 80px;gap:18px;align-items:center;padding:19px 0;border-bottom:1px solid var(--line)}.news-row time,.news-row .tag{font-size:12px;color:var(--teal)}.news-row h3{font-size:16px;margin:0}.news-row h3 a:hover{color:var(--copper)}.news-feature{background:var(--deep);color:#fff;border-radius:var(--radius);padding:32px}.news-feature h3{font-size:24px;line-height:1.4;margin:35px 0 12px}.news-feature p{font-size:13px;color:#bbc8c1}
        .trust{background:#f5f5f1}.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.trust-item{border:1px solid var(--line);background:#fff;padding:22px;border-radius:10px}.trust-item strong{display:block;margin-bottom:8px}.trust-item span{color:var(--muted);font-size:13px}
        .faq{background:#fff}.accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent}.accordion-button{background:transparent!important;box-shadow:none!important;color:var(--ink);font-weight:700;padding:21px 4px;font-size:16px}.accordion-button:not(.collapsed){color:var(--copper)}.accordion-body{padding:0 30px 22px 4px;color:var(--muted);font-size:14px}
        .contact{background:var(--copper);color:#fff;padding:82px 0}.contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:start}.contact h2{font-size:42px;line-height:1.3;margin:10px 0 18px}.contact p{color:#fae6dc}.form-panel{background:#fff;color:var(--ink);padding:28px;border-radius:var(--radius)}.form-label{font-size:13px;font-weight:700;margin-bottom:6px}.form-control,.form-select{border:1px solid #ccd3ce;border-radius:7px;padding:12px 13px;background:#fbfcfa}.form-control:focus,.form-select:focus{border-color:var(--copper);box-shadow:0 0 0 3px rgba(198,106,61,.14)}.form-panel .btn-copper{width:100%;margin-top:7px}
        footer{background:var(--deep);color:#c2ccc7;padding:55px 0 22px}.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr 1fr;gap:40px}.footer-brand{color:#fff;font-size:21px;font-weight:800}.footer-brand em{color:var(--copper);font-style:normal}.footer-title{font-size:13px;color:#fff;margin-bottom:15px;font-weight:700}.footer-links{display:grid;gap:8px;font-size:13px;color:#9eaaa5}.footer-links a:hover{color:#e18a60}.footer-note{border-top:1px solid #35403d;margin-top:40px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#81908a}
        @media(max-width:991px){:root{--space:78px}.navbar{min-height:68px}.nav-link{padding:13px!important}.nav-link.active:after{left:13px;right:auto;width:28px;bottom:5px}.nav-cta{margin:10px 13px;display:inline-block}.intro-grid,.case-inner,.story,.contact-grid,.news-layout{grid-template-columns:1fr;gap:35px}.pain-list{grid-template-columns:repeat(3,1fr)}.pain-item:nth-child(3){border-right:0}.pain-item:nth-child(-n+3){border-bottom:1px solid #cbd1ca}.process-track{grid-template-columns:repeat(3,1fr);gap:25px}.step:not(:last-child){margin-right:0}.product-grid{grid-template-columns:1fr 1fr}.product-card:first-child{grid-column:span 2}.metric-grid{grid-template-columns:repeat(2,1fr)}.audience-grid,.trust-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}}
        @media(max-width:575px){body{font-size:14px}.container{padding-left:18px;padding-right:18px}.topbar .inner{min-height:31px}.topbar .inner span:last-child{display:none}.brand{font-size:17px}.brand small{font-size:8px}.hero{min-height:590px}.hero-content{padding:80px 0 115px}.hero p{font-size:15px;line-height:1.8}.hero-index{right:18px;bottom:95px;font-size:28px}h1{font-size:37px}.section-head h2{font-size:29px}.pain{padding:45px 0}.pain-list{grid-template-columns:1fr}.pain-item{border-right:0!important;border-bottom:1px solid #cbd1ca!important;padding:19px 5px}.pain-item:last-child{border-bottom:0!important}.process-track{grid-template-columns:1fr;gap:0}.step{padding-bottom:25px;padding-left:25px;border-top:0;border-left:2px solid var(--line)}.step:before{top:0;left:-8px}.product-grid,.adv-grid{grid-template-columns:1fr}.product-card:first-child{grid-column:auto}.product-card:first-child img,.product-card img{height:205px}.metric strong{font-size:31px}.news-row{grid-template-columns:1fr;gap:3px}.news-row .tag{display:none}.audience-grid,.trust-grid{grid-template-columns:1fr}.audience-item{min-height:auto}.footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-grid>div:first-child{grid-column:span 2}.footer-note{display:block}.footer-note span{display:block;margin-top:7px}.contact h2{font-size:31px}.form-panel{padding:20px}}

/* roulang page: category1 */
:root{
            --ink:#171b1d;--graphite:#202628;--deep:#111719;--paper:#f5f5f1;
            --warm:#ebe9e2;--copper:#c66a3d;--copper-dark:#9d4d2c;--teal:#6c8581;
            --muted:#697372;--line:#d9ddd7;--white:#fff;--radius:14px;
            --shadow:0 16px 38px rgba(22,29,29,.09);--max:1240px;--space:88px;
        }
        *,*:before,*:after{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;font-size:15px}
        img{display:block;max-width:100%;height:auto}
        a{color:inherit;text-decoration:none;transition:.25s ease}
        button,input,textarea{font:inherit}
        .container{max-width:var(--max);padding-left:24px;padding-right:24px}
        .topbar{background:var(--deep);color:#aebbb7;font-size:12px;letter-spacing:.04em}
        .topbar .inner{min-height:34px;display:flex;align-items:center;justify-content:space-between}
        .topbar strong{color:#e3e8e2;font-weight:500}
        .main-nav{background:rgba(17,23,25,.98);color:#e9ede8;border-bottom:1px solid rgba(255,255,255,.1);position:sticky;top:0;z-index:20}
        .navbar{min-height:76px;padding:0}
        .brand{font-weight:800;font-size:20px;letter-spacing:-.04em;white-space:nowrap}
        .brand small{display:block;color:#81918c;font-size:10px;font-weight:400;letter-spacing:.12em;line-height:1}
        .navbar-nav{gap:8px}
        .nav-link{color:#b9c4bf!important;padding:27px 13px!important;font-size:14px;position:relative}
        .nav-link:hover,.nav-link.active{color:#fff!important}
        .nav-link.active:after{content:"";position:absolute;left:13px;right:13px;bottom:17px;height:2px;background:var(--copper)}
        .navbar-toggler{border:1px solid #687773;padding:9px}
        .navbar-toggler:focus{box-shadow:0 0 0 3px rgba(198,106,61,.28)}
        .nav-cta,.btn-copper{background:var(--copper);color:#fff;border:1px solid var(--copper);padding:11px 20px;border-radius:7px;font-weight:600;display:inline-block}
        .nav-cta:hover,.btn-copper:hover{background:var(--copper-dark);border-color:var(--copper-dark);color:#fff;transform:translateY(-2px)}
        .btn-outline-dark{border:1px solid #8a9691;color:var(--ink);padding:11px 20px;border-radius:7px}
        .btn-outline-dark:hover{background:var(--graphite);color:#fff;border-color:var(--graphite)}
        a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(198,106,61,.45);outline-offset:3px}
        .page-banner{min-height:400px;background:linear-gradient(90deg,rgba(12,19,20,.92),rgba(12,19,20,.64)),url('/assets/images/backpic/back-2.webp') center/cover;color:#fff;display:flex;align-items:center;position:relative}
        .page-banner:after{content:"01 / PLATFORM";position:absolute;right:7%;bottom:42px;color:#d6906d;font:20px Georgia,serif;letter-spacing:.08em}
        .banner-content{max-width:760px;padding:78px 0}
        .eyebrow,.section-kicker{color:var(--copper);font-size:12px;letter-spacing:.16em;font-weight:700;text-transform:uppercase}
        .banner-content h1{font-size:clamp(34px,5vw,64px);line-height:1.18;letter-spacing:-.055em;margin:14px 0 20px}
        .banner-content p{font-size:18px;line-height:1.9;color:#dbe1dc;max-width:700px;margin:0}
        section{padding:var(--space) 0}
        .section-head{max-width:770px;margin-bottom:40px}
        .section-head h2{font-size:clamp(27px,3.4vw,43px);line-height:1.25;letter-spacing:-.04em;margin:10px 0 15px}
        .section-head p{color:var(--muted);margin:0;font-size:16px}
        .architecture{background:#fff}
        .layer-stack{border-left:2px solid var(--copper);position:relative;padding-left:34px}
        .layer{display:grid;grid-template-columns:190px 1fr;gap:28px;padding:22px 24px;border:1px solid var(--line);border-left:0;background:#fafaf7;margin-bottom:12px;position:relative}
        .layer:before{content:"";position:absolute;width:10px;height:10px;border:2px solid var(--copper);background:var(--paper);border-radius:50%;left:-40px;top:29px}
        .layer strong{font-size:19px}.layer span{color:var(--muted);font-size:14px}
        .catalog-section{background:var(--paper)}
        .catalog-list{border-top:1px solid #bbc5bf}
        .catalog-item{display:grid;grid-template-columns:80px 1fr 230px 120px;gap:22px;align-items:center;padding:28px 0;border-bottom:1px solid var(--line)}
        .catalog-no{color:var(--copper);font:24px Georgia,serif}
        .catalog-item h3{font-size:21px;margin:0 0 7px}.catalog-item p{font-size:14px;color:var(--muted);margin:0}
        .tag-list{display:flex;gap:7px;flex-wrap:wrap}.tech-tag{display:inline-block;color:var(--teal);border:1px solid #a9bab5;border-radius:4px;padding:2px 8px;font-size:11px}
        .catalog-item .arrow{color:var(--copper);font-size:25px;text-align:right}
        .matrix-section{background:var(--warm)}
        .matrix-wrap{overflow-x:auto;border:1px solid #cbd2cc;background:#fff}
        .matrix{min-width:700px;width:100%;border-collapse:collapse}
        .matrix th,.matrix td{padding:18px 20px;border-bottom:1px solid var(--line);border-right:1px solid var(--line);text-align:left}
        .matrix th{background:var(--graphite);color:#fff;font-weight:500;font-size:14px}.matrix td{font-size:14px;color:var(--muted)}
        .matrix tr:last-child td{border-bottom:0}.matrix td strong{color:var(--ink)}
        .timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid var(--copper)}
        .step{padding:25px 18px 10px;border-right:1px solid var(--line);position:relative}.step:last-child{border-right:0}
        .step:before{content:"";position:absolute;top:-8px;left:18px;width:14px;height:14px;background:var(--copper);border:4px solid var(--paper);border-radius:50%}
        .step b{font:25px Georgia,serif;color:var(--copper)}.step h3{font-size:17px;margin:12px 0 6px}.step p{font-size:13px;color:var(--muted);margin:0}
        .scene-section{background:#fff}.scene-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:16px}
        .scene{min-height:210px;padding:26px;background:#eef0eb;border-radius:var(--radius);border:1px solid transparent;transition:.25s}
        .scene:first-child{background:var(--graphite);color:#fff}.scene:hover{border-color:var(--copper);transform:translateY(-4px)}
        .scene h3{font-size:20px;margin:28px 0 8px}.scene p{font-size:13px;color:var(--muted);margin:0}.scene:first-child p{color:#bdc8c3}
        .faq-section{background:var(--warm)}
        .accordion{--bs-accordion-bg:transparent;--bs-accordion-border-color:var(--line);--bs-accordion-btn-focus-box-shadow:0 0 0 3px rgba(198,106,61,.2)}
        .accordion-item{background:#fff;border:1px solid var(--line)!important;margin-bottom:10px;border-radius:8px!important;overflow:hidden}
        .accordion-button{font-weight:600;color:var(--ink);padding:20px 22px;background:#fff}
        .accordion-button:not(.collapsed){color:var(--copper-dark);background:#fff8f4;box-shadow:none}
        .accordion-button:after{filter:sepia(1) saturate(3)}.accordion-body{color:var(--muted);font-size:14px;padding:0 22px 22px}
        .contact-section{background:var(--deep);color:#fff}
        .contact-section p{color:#bac6c0}.contact-box{border:1px solid rgba(255,255,255,.18);padding:30px;border-radius:var(--radius);background:rgba(255,255,255,.035)}
        .form-label{font-size:13px;color:#cbd5cf}.form-control{background:#1b2324;border:1px solid #4b5a56;color:#fff;border-radius:7px;padding:12px 14px}.form-control::placeholder{color:#83908b}.form-control:focus{background:#1b2324;color:#fff;border-color:var(--copper);box-shadow:0 0 0 3px rgba(198,106,61,.2)}
        footer{background:var(--deep);color:#fff;border-top:1px solid rgba(255,255,255,.12);padding:58px 0 22px}
        .footer-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1.2fr;gap:34px}.footer-brand{font-size:20px;font-weight:800}.footer-brand em{font-style:normal;color:var(--copper)}
        .footer-title{font-size:13px;color:#e5ebe5;font-weight:700;margin-bottom:15px}.footer-links{display:flex;flex-direction:column;gap:8px;color:#9eaaa5;font-size:13px}.footer-links a:hover{color:#fff}
        .footer-note{display:flex;justify-content:space-between;border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding-top:18px;color:#7f8c87;font-size:12px}.footer-note a:hover{color:#fff}
        @media(max-width:991px){.navbar{padding:12px 0}.nav-link{padding:13px 4px!important}.nav-link.active:after{left:4px;right:auto;width:35px;bottom:4px}.nav-cta{margin-top:10px}.catalog-item{grid-template-columns:60px 1fr 150px}.catalog-item .arrow{display:none}.timeline{grid-template-columns:repeat(3,1fr);row-gap:26px}.step:nth-child(3){border-right:0}.footer-grid{grid-template-columns:repeat(2,1fr)}}
        @media(max-width:767px){:root{--space:64px}.topbar .inner{display:none}.page-banner{min-height:390px}.banner-content{padding:65px 0 80px}.banner-content p{font-size:16px}.page-banner:after{right:24px;bottom:25px;font-size:15px}.layer{grid-template-columns:1fr;gap:4px;padding:18px}.layer:before{left:-41px}.architecture .section-head{margin-left:10px}.catalog-item{grid-template-columns:45px 1fr;gap:12px}.catalog-item .tag-list{grid-column:2}.scene-grid{grid-template-columns:1fr}.scene{min-height:170px}.timeline{grid-template-columns:1fr;border-top:0;border-left:2px solid var(--copper);padding-left:22px}.step{border-right:0;border-bottom:1px solid var(--line);padding:5px 0 22px 18px}.step:before{left:-30px;top:7px}.step:last-child{border-bottom:0}.footer-grid{grid-template-columns:1fr;gap:25px}.footer-note{display:block;line-height:2}.footer-note span{display:block}}
        @media(max-width:375px){.container{padding-left:18px;padding-right:18px}.brand{font-size:17px}.brand small{font-size:8px}.banner-content h1{font-size:34px}.nav-cta{padding:10px 14px;font-size:13px}}

/* roulang page: category2 */
:root{
 --ink:#171b1d;--graphite:#202628;--deep:#111719;--paper:#f5f5f1;--warm:#ebe9e2;
 --copper:#c66a3d;--copper-dark:#9d4d2c;--teal:#6c8581;--muted:#697372;
 --line:#d9ddd7;--white:#fff;--radius:14px;--shadow:0 16px 38px rgba(22,29,29,.09);
 --max:1240px;--space:88px
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.75}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:.25s ease}
button,input,textarea{font:inherit}
.container{max-width:var(--max);padding-left:24px;padding-right:24px}
.topbar{background:var(--deep);color:#aebbb7;font-size:12px;letter-spacing:.03em}
.topbar .inner{min-height:34px;display:flex;align-items:center;justify-content:space-between}
.topbar strong{color:#e3e8e2;font-weight:600}
.main-nav{background:rgba(17,23,25,.98);color:#e9ede8;border-bottom:1px solid rgba(255,255,255,.1);position:sticky;top:0;z-index:20}
.navbar{min-height:76px;padding:0}
.brand{font-weight:800;font-size:20px;letter-spacing:-.04em;white-space:nowrap}
.brand small{display:block;color:#81918c;font-size:10px;font-weight:400;letter-spacing:.12em;line-height:1}
.navbar-nav{gap:7px}
.nav-link{color:#b9c4bf!important;padding:27px 12px!important;font-size:14px;position:relative}
.nav-link:hover,.nav-link.active{color:#fff!important}
.nav-link.active:after{content:"";position:absolute;left:12px;right:12px;bottom:17px;height:2px;background:var(--copper)}
.navbar-toggler{border:1px solid #687773;padding:9px}
.navbar-toggler:focus{box-shadow:0 0 0 3px rgba(198,106,61,.28)}
.nav-cta,.btn-copper{background:var(--copper);color:#fff;border:1px solid var(--copper);padding:11px 20px;border-radius:7px;font-weight:600;display:inline-block}
.nav-cta:hover,.btn-copper:hover{background:var(--copper-dark);border-color:var(--copper-dark);color:#fff;transform:translateY(-2px)}
.btn-outline-light{border:1px solid rgba(255,255,255,.55);color:#fff;padding:11px 20px;border-radius:7px}
.btn-outline-light:hover{background:#fff;color:var(--deep)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(198,106,61,.45);outline-offset:3px}
.page-banner{min-height:430px;position:relative;color:#fff;background:linear-gradient(90deg,rgba(12,19,20,.94),rgba(12,19,20,.62),rgba(12,19,20,.28)),url('/assets/images/backpic/back-2.webp') center/cover;display:flex;align-items:center}
.page-banner:after{content:"";position:absolute;inset:auto 0 0;height:70px;background:linear-gradient(transparent,var(--paper))}
.banner-content{position:relative;z-index:1;max-width:780px;padding:78px 0 88px}
.eyebrow,.section-kicker{color:var(--copper);font-size:12px;letter-spacing:.15em;font-weight:700;text-transform:uppercase}
.banner-content h1{font-size:clamp(34px,5vw,62px);line-height:1.16;letter-spacing:-.055em;margin:14px 0 18px}
.banner-content p{font-size:18px;color:#d8e0db;max-width:700px;margin:0 0 26px}
.banner-meta{display:flex;gap:10px;flex-wrap:wrap}
.tech-tag,.badge-tech{display:inline-block;color:var(--teal);border:1px solid #a9bab5;border-radius:4px;padding:3px 9px;font-size:11px}
.banner-meta .tech-tag{color:#e8a077;border-color:#92563d}
section{padding:var(--space) 0}
.section-head{max-width:780px;margin-bottom:40px}
.section-head h2{font-size:clamp(27px,3.4vw,43px);line-height:1.25;letter-spacing:-.04em;margin:9px 0 14px}
.section-head p{color:var(--muted);margin:0;font-size:16px}
.capability-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:55px;align-items:start}
.capability-index{border-left:2px solid var(--copper);padding-left:22px;position:sticky;top:120px}
.capability-index strong{font-size:42px;line-height:1;color:var(--copper);font-family:Georgia,serif}
.capability-index p{color:var(--muted);font-size:14px;margin:14px 0 0}
.capability-list{border-top:1px solid var(--line)}
.capability-row{display:grid;grid-template-columns:70px 1fr 120px;gap:20px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line)}
.capability-row .num{font-family:Georgia,serif;font-size:25px;color:var(--copper)}
.capability-row h3{font-size:19px;margin:0 0 4px}
.capability-row p{font-size:13px;color:var(--muted);margin:0}
.capability-row .state{text-align:right;font-size:11px;color:var(--teal);letter-spacing:.06em}
.middleware{background:var(--warm)}
.middleware-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
.middleware-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:27px;min-height:188px;transition:.25s}
.middleware-card:hover{border-color:var(--copper);box-shadow:var(--shadow);transform:translateY(-4px)}
.middleware-card.wide{grid-row:span 2;background:var(--graphite);color:#fff;padding:34px}
.middleware-card h3{font-size:20px;margin:14px 0 8px}
.middleware-card p{font-size:13px;color:var(--muted);margin:0}
.middleware-card.wide p{color:#c4cfca}
.card-mark{width:34px;height:34px;border:1px solid var(--copper);border-radius:7px;display:grid;place-items:center;color:var(--copper);font-weight:700}
.protocol-layout{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:center}
.protocol-table{border:1px solid var(--line);background:#fff;border-radius:var(--radius);overflow:hidden}
.protocol-line{display:grid;grid-template-columns:145px 1fr;gap:20px;padding:17px 21px;border-bottom:1px solid var(--line)}
.protocol-line:last-child{border-bottom:0}
.protocol-line strong{font-size:14px}
.protocol-line span{font-size:13px;color:var(--muted)}
.node-map{background:var(--deep);border-radius:var(--radius);padding:34px;color:#fff;min-height:315px;position:relative;overflow:hidden}
.node-map:before{content:"";position:absolute;inset:18px;border:1px dashed rgba(198,106,61,.35);border-radius:10px}
.node-map h3,.node-map .node,.node-map p{position:relative;z-index:1}
.node-map h3{font-size:21px;margin:0 0 30px}
.nodes{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.node{border:1px solid #53645f;padding:14px;border-radius:8px;background:#1d292a;font-size:13px}
.node b{display:block;color:#e18a60;margin-bottom:4px}
.domain{background:#fff}
.domain-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:center}
.domain-image{position:relative}
.domain-image img{width:100%;aspect-ratio:1.25;object-fit:cover;border-radius:var(--radius)}
.domain-note{position:absolute;right:-20px;bottom:24px;background:var(--copper);color:#fff;padding:17px 20px;border-radius:8px;max-width:210px;font-size:13px}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line)}
.compare > div{padding:25px;background:var(--paper)}
.compare > div:last-child{background:var(--graphite);color:#fff}
.compare h3{font-size:18px;margin:0 0 12px}
.compare ul{padding-left:18px;margin:0;color:var(--muted);font-size:13px}
.compare > div:last-child ul{color:#c7d0cb}
.validation{background:var(--graphite);color:#fff}
.validation .section-head p{color:#b9c6c0}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid #50615d;border-bottom:1px solid #50615d}
.step{padding:25px 22px;border-right:1px solid #50615d;min-height:190px}
.step:last-child{border-right:0}
.step-number{color:#e18a60;font:32px Georgia,serif}
.step h3{font-size:17px;margin:12px 0 7px}
.step p{color:#b8c4bf;font-size:13px;margin:0}
.scenes{background:var(--paper)}
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.scene{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
.scene:hover{box-shadow:var(--shadow);border-color:var(--copper)}
.scene img{height:175px;width:100%;object-fit:cover}
.scene-body{padding:20px}
.scene-body h3{font-size:18px;margin:0 0 7px}
.scene-body p{font-size:13px;color:var(--muted);margin:0}
.faq-contact{background:var(--warm)}
.faq-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:start}
.accordion-item{border:1px solid var(--line)!important;background:#fff;margin-bottom:10px;border-radius:9px!important;overflow:hidden}
.accordion-button{font-weight:600;color:var(--ink);background:#fff;padding:19px 20px}
.accordion-button:not(.collapsed){color:var(--copper-dark);background:#fff4ed;box-shadow:none}
.accordion-button:focus{box-shadow:0 0 0 3px rgba(198,106,61,.2)}
.accordion-body{font-size:13px;color:var(--muted);padding:0 20px 20px}
.contact-box{background:var(--deep);color:#fff;border-radius:var(--radius);padding:30px}
.contact-box h2{font-size:25px;line-height:1.35;margin:0 0 10px}
.contact-box p{font-size:13px;color:#bdc8c3;margin-bottom:22px}
.form-label{font-size:13px;color:#dce3de;margin-bottom:5px}
.form-control{background:#202b2c;border:1px solid #50605c;color:#fff;border-radius:6px;padding:11px 13px}
.form-control::placeholder{color:#8c9b96}
.form-control:focus{background:#202b2c;color:#fff;border-color:var(--copper);box-shadow:0 0 0 3px rgba(198,106,61,.18)}
footer{background:var(--deep);color:#dbe3de;padding:58px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1.2fr;gap:35px}
.footer-brand{font-size:21px;font-weight:800}
.footer-brand em{font-style:normal;color:var(--copper)}
.footer-title{font-size:13px;color:#e18a60;margin-bottom:15px;font-weight:700}
.footer-links{display:flex;flex-direction:column;gap:7px;color:#9eaaa5;font-size:13px}
.footer-links a:hover{color:#fff}
.footer-note{display:flex;justify-content:space-between;border-top:1px solid #34403e;margin-top:38px;padding-top:18px;color:#7f8d88;font-size:12px}
.footer-note a:hover{color:#fff}
@media(max-width:991px){
 .navbar-nav{gap:0}.nav-link{padding:13px 0!important}.nav-link.active:after{left:0;right:auto;width:32px;bottom:5px}.nav-cta{margin:9px 0 18px}
 .capability-layout,.protocol-layout,.domain-layout,.faq-layout{grid-template-columns:1fr;gap:32px}
 .capability-index{position:static}.middleware-grid{grid-template-columns:1fr}
 .middleware-card.wide{grid-row:auto}.steps{grid-template-columns:repeat(2,1fr)}
 .step:nth-child(2){border-right:0}.step:nth-child(-n+2){border-bottom:1px solid #50615d}
 .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:767px){
 :root{--space:62px}.topbar .inner{display:none}.topbar{height:5px;background:var(--copper)}
 .container{padding-left:18px;padding-right:18px}.navbar{min-height:68px}.brand{font-size:17px}.brand small{font-size:8px}
 .page-banner{min-height:460px}.banner-content{padding:70px 0 85px}.banner-content h1{font-size:36px}.banner-content p{font-size:16px}
 .capability-row{grid-template-columns:45px 1fr;gap:12px}.capability-row .state{grid-column:2;text-align:left}
 .protocol-line{grid-template-columns:1fr;gap:3px}.compare{grid-template-columns:1fr}.domain-note{right:10px;bottom:12px}
 .scene-grid{grid-template-columns:1fr}.steps{grid-template-columns:1fr}.step{border-right:0!important;border-bottom:1px solid #50615d!important}.step:last-child{border-bottom:0!important}
 .footer-grid{grid-template-columns:1fr;gap:27px}.footer-note{display:block}.footer-note span{display:block;margin-bottom:8px}
}
@media(max-width:375px){.banner-content h1{font-size:32px}.banner-content p{font-size:15px}.hero-actions{display:grid}.hero-actions a{width:100%;text-align:center}}

/* roulang page: category3 */
:root{
 --ink:#171b1d;--graphite:#202628;--deep:#111719;--paper:#f5f5f1;
 --warm:#ebe9e2;--copper:#c66a3d;--copper-dark:#9d4d2c;--teal:#6c8581;
 --muted:#697372;--line:#d9ddd7;--white:#fff;--radius:14px;
 --shadow:0 16px 38px rgba(22,29,29,.09);--max:1240px;--space:88px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;font-size:15px}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:.25s ease}
button,input,textarea{font:inherit}
.container{max-width:var(--max);padding-left:24px;padding-right:24px}
.topbar{background:var(--deep);color:#aebbb7;font-size:12px;letter-spacing:.04em}
.topbar .inner{min-height:34px;display:flex;align-items:center;justify-content:space-between}
.topbar strong{color:#e3e8e2;font-weight:500}
.main-nav{background:rgba(17,23,25,.98);color:#e9ede8;border-bottom:1px solid rgba(255,255,255,.1);position:sticky;top:0;z-index:20}
.navbar{min-height:76px;padding:0}
.brand{font-weight:800;font-size:20px;letter-spacing:-.04em;white-space:nowrap}
.brand small{display:block;color:#81918c;font-size:10px;font-weight:400;letter-spacing:.12em;line-height:1}
.navbar-nav{gap:5px}
.nav-link{color:#b9c4bf!important;padding:27px 12px!important;font-size:14px;position:relative}
.nav-link:hover,.nav-link.active{color:#fff!important}
.nav-link.active:after{content:"";position:absolute;left:12px;right:12px;bottom:17px;height:2px;background:var(--copper)}
.navbar-toggler{border:1px solid #687773;padding:9px}
.navbar-toggler:focus{box-shadow:0 0 0 3px rgba(198,106,61,.28)}
.nav-cta,.btn-copper{background:var(--copper);color:#fff;border:1px solid var(--copper);padding:11px 20px;border-radius:7px;font-weight:600;display:inline-block}
.nav-cta:hover,.btn-copper:hover{background:var(--copper-dark);border-color:var(--copper-dark);color:#fff;transform:translateY(-2px)}
.btn-outline-light{border:1px solid rgba(255,255,255,.5);color:#fff;padding:11px 20px;border-radius:7px}
.btn-outline-light:hover{background:#fff;color:var(--deep)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(198,106,61,.45);outline-offset:3px}
.page-hero{min-height:440px;color:#fff;display:flex;align-items:center;position:relative;background:linear-gradient(90deg,rgba(12,19,20,.93),rgba(12,19,20,.62),rgba(12,19,20,.25)),url('/assets/images/backpic/back-3.webp') center/cover}
.page-hero:after{content:"";position:absolute;inset:auto 0 0;height:65px;background:linear-gradient(transparent,var(--paper))}
.hero-content{position:relative;z-index:1;max-width:790px;padding:78px 0 88px}
.eyebrow,.section-kicker{color:var(--copper);font-size:12px;letter-spacing:.16em;font-weight:700;text-transform:uppercase}
.page-hero h1{font-size:clamp(34px,5vw,64px);line-height:1.18;letter-spacing:-.05em;margin:15px 0 20px}
.page-hero p{font-size:18px;line-height:1.9;color:#dbe1dc;max-width:700px;margin:0 0 28px}
.hero-points{display:flex;gap:10px;flex-wrap:wrap}
.hero-points span,.tech-tag{display:inline-block;border:1px solid rgba(225,138,96,.7);color:#f0b08f;border-radius:4px;padding:5px 10px;font-size:12px}
section{padding:var(--space) 0}
.section-head{max-width:780px;margin-bottom:40px}
.section-head h2{font-size:clamp(27px,3.4vw,43px);line-height:1.25;letter-spacing:-.04em;margin:10px 0 15px}
.section-head p{color:var(--muted);margin:0;font-size:16px}
.arch-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);background:#fff}
.arch-flow article{padding:28px 24px;min-height:190px;border-right:1px solid var(--line);position:relative}
.arch-flow article:last-child{border-right:0}
.arch-flow article:after{content:"→";position:absolute;right:-11px;top:42%;background:var(--copper);color:#fff;width:21px;height:21px;text-align:center;line-height:20px;border-radius:50%;z-index:2}
.arch-flow article:last-child:after{display:none}
.step-no{font:28px Georgia,serif;color:var(--copper)}
.arch-flow h3{font-size:18px;margin:12px 0 8px}
.arch-flow p,.wide-card p,.role p,.faq-answer{color:var(--muted);font-size:14px;margin:0}
.list-section{background:var(--warm)}
.software-list{display:grid;gap:14px}
.wide-card{display:grid;grid-template-columns:95px 1fr 230px;gap:25px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:23px 26px;transition:.25s}
.wide-card:hover{border-color:var(--copper);box-shadow:var(--shadow);transform:translateX(4px)}
.wide-card .number{font:32px Georgia,serif;color:var(--teal)}
.wide-card h3{font-size:21px;margin:0 0 6px}
.wide-card .tags{display:flex;gap:7px;flex-wrap:wrap;justify-content:flex-end}
.tech-tag{color:var(--teal);border-color:#a9bab5;padding:3px 8px}
.safety-band{background:var(--deep);color:#fff}
.safety-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:start}
.safety-grid h2{font-size:clamp(28px,4vw,48px);line-height:1.25;margin:12px 0 18px}
.safety-grid p{color:#c1cbc6}
.spec-box{border:1px solid rgba(255,255,255,.2);padding:25px;border-radius:var(--radius)}
.spec-row{display:flex;justify-content:space-between;gap:20px;padding:15px 0;border-bottom:1px solid rgba(255,255,255,.14)}
.spec-row:last-child{border-bottom:0}
.spec-row span{color:#aebbb7}.spec-row strong{color:#f1b08f;text-align:right}
.timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.timeline article{background:#fff;padding:25px 20px;min-height:175px}
.timeline .step-no{font-size:22px}
.timeline h3{font-size:17px;margin:12px 0 7px}
.timeline p{font-size:13px;color:var(--muted);margin:0}
.trace{background:#fff}
.trace-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.trace-card{border:1px solid var(--line);border-radius:var(--radius);padding:28px;background:#fafbf8}
.trace-card h3{font-size:19px;margin:0 0 12px}
.trace-card ul{margin:0;padding-left:20px;color:var(--muted);line-height:2}
.roles{background:var(--warm)}
.role-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#cbd3cc;border:1px solid #cbd3cc}
.role{background:#eef0eb;padding:25px 21px;min-height:170px}
.role h3{font-size:17px;margin:0 0 9px}
.faq-contact{background:#fff}
.faq-layout{display:grid;grid-template-columns:1fr .85fr;gap:70px}
.accordion-item{border:0;border-bottom:1px solid var(--line)!important;background:transparent}
.accordion-button{background:transparent!important;color:var(--ink);font-weight:700;padding:20px 4px;box-shadow:none!important}
.accordion-button:not(.collapsed){color:var(--copper)}
.accordion-body{padding:0 25px 20px 4px}
.contact-box{background:var(--graphite);color:#fff;border-radius:var(--radius);padding:30px}
.contact-box h2{font-size:28px;line-height:1.35;margin:0 0 12px}
.contact-box p{color:#bdc8c3;font-size:14px}
.form-label{font-size:13px;color:#d9e1dc;margin-bottom:5px}
.form-control{background:#fff;border:1px solid #d6ddd6;border-radius:6px;padding:11px 13px}
.form-control:focus{border-color:var(--copper);box-shadow:0 0 0 3px rgba(198,106,61,.18)}
textarea.form-control{min-height:105px}
footer{background:var(--deep);color:#e9ede8;padding:58px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1.2fr;gap:30px}
.footer-brand{font-size:20px;font-weight:800}.footer-brand em{color:var(--copper);font-style:normal}
.footer-title{font-weight:700;color:#fff;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:7px;color:#9eaaa5;font-size:13px}
.footer-links a:hover{color:#e18a60}
.footer-note{border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding-top:18px;color:#879590;font-size:12px;display:flex;justify-content:space-between;gap:20px}
.footer-note a:hover{color:#fff}
@media(max-width:991px){
 .navbar{padding:12px 0}.navbar-nav{gap:0;margin:14px 0!important}.nav-link{padding:13px 4px!important}.nav-link.active:after{left:4px;right:auto;width:28px;bottom:7px}.nav-cta{margin-bottom:8px}
 .arch-flow,.timeline{grid-template-columns:repeat(2,1fr)}.arch-flow article:nth-child(2){border-right:0}.arch-flow article:nth-child(2):after{display:none}
 .safety-grid,.faq-layout{grid-template-columns:1fr;gap:35px}.role-grid{grid-template-columns:repeat(2,1fr)}
 .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:575px){
 .topbar .inner{min-height:31px}.topbar .inner span:first-child{display:none}.topbar .inner span:last-child{font-size:11px}
 .brand{font-size:17px}.brand small{font-size:8px}.page-hero{min-height:500px}.hero-content{padding:65px 0 90px}.page-hero h1{font-size:36px}.page-hero p{font-size:15px}
 section{padding:62px 0}.section-head{margin-bottom:28px}
 .arch-flow,.timeline,.role-grid,.trace-grid{grid-template-columns:1fr}
 .arch-flow article{border-right:0;border-bottom:1px solid var(--line);min-height:auto}.arch-flow article:after{content:"↓";right:48%;top:auto;bottom:-11px}.arch-flow article:last-child{border-bottom:0}
 .wide-card{grid-template-columns:48px 1fr;gap:14px;padding:20px}.wide-card .tags{grid-column:2;justify-content:flex-start}.wide-card h3{font-size:18px}
 .footer-grid{grid-template-columns:1fr;gap:25px}.footer-note{display:block;line-height:2}
 .container{padding-left:18px;padding-right:18px}.hero-actions a{width:100%;text-align:center}
}

/* roulang page: category4 */
:root{--ink:#171b1d;--graphite:#202628;--deep:#111719;--paper:#f5f5f1;--warm:#ebe9e2;--copper:#c66a3d;--copper-dark:#9d4d2c;--teal:#6c8581;--muted:#697372;--line:#d9ddd7;--white:#fff;--radius:14px;--shadow:0 16px 38px rgba(22,29,29,.09);--max:1240px;--space:82px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;font-size:15px}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none;transition:.25s ease}button,input,textarea{font:inherit}.container{max-width:var(--max);padding-left:24px;padding-right:24px}
.topbar{background:var(--deep);color:#aebbb7;font-size:12px;letter-spacing:.04em}.topbar .inner{min-height:34px;display:flex;align-items:center;justify-content:space-between}.topbar strong{color:#e3e8e2;font-weight:500}
.main-nav{background:rgba(17,23,25,.98);color:#e9ede8;border-bottom:1px solid rgba(255,255,255,.1);position:sticky;top:0;z-index:20}.navbar{min-height:76px;padding:0}.brand{font-weight:800;font-size:20px;letter-spacing:-.04em;white-space:nowrap}.brand small{display:block;color:#81918c;font-size:10px;font-weight:400;letter-spacing:.12em;line-height:1}.navbar-nav{gap:8px}.nav-link{color:#b9c4bf!important;padding:27px 13px!important;font-size:14px;position:relative}.nav-link:hover,.nav-link.active{color:#fff!important}.nav-link.active:after{content:"";position:absolute;left:13px;right:13px;bottom:17px;height:2px;background:var(--copper)}.navbar-toggler{border:1px solid #687773;padding:9px}.navbar-toggler:focus{box-shadow:0 0 0 3px rgba(198,106,61,.28)}.nav-cta,.btn-copper{background:var(--copper);color:#fff;border:1px solid var(--copper);padding:11px 20px;border-radius:7px;font-weight:600;display:inline-block}.nav-cta:hover,.btn-copper:hover{background:var(--copper-dark);border-color:var(--copper-dark);color:#fff;transform:translateY(-2px)}.btn-outline-dark{border:1px solid #687773;color:var(--ink);padding:11px 20px;border-radius:7px}.btn-outline-dark:hover{background:var(--graphite);color:#fff}.btn-outline-light{border:1px solid rgba(255,255,255,.5);color:#fff;padding:11px 20px;border-radius:7px}.btn-outline-light:hover{background:#fff;color:var(--deep)}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(198,106,61,.45);outline-offset:3px}
.page-banner{min-height:360px;background:linear-gradient(90deg,rgba(12,19,20,.92),rgba(12,19,20,.58)),url('/assets/images/backpic/back-4.webp') center/cover;color:#fff;display:flex;align-items:center}.banner-content{padding:70px 0}.eyebrow,.section-kicker{color:var(--copper);font-size:12px;letter-spacing:.16em;font-weight:700;text-transform:uppercase}.page-banner h1{font-size:clamp(34px,5vw,62px);line-height:1.18;letter-spacing:-.05em;max-width:780px;margin:16px 0}.page-banner p{color:#d6dfda;max-width:700px;font-size:17px;margin:0}
section{padding:var(--space) 0}.section-head{max-width:760px;margin-bottom:40px}.section-head h2{font-size:clamp(27px,3.4vw,43px);line-height:1.25;letter-spacing:-.04em;margin:10px 0 15px}.section-head p{color:var(--muted);margin:0;font-size:16px}.section-head.row-head{display:flex;justify-content:space-between;align-items:end;gap:30px;max-width:none}
.architecture{background:#fff}.arch-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);background:var(--line)}.arch-layer{background:#fff;padding:30px 24px;min-height:190px;border-right:1px solid var(--line);position:relative}.arch-layer:last-child{border:0}.arch-layer:after{content:"→";position:absolute;right:-13px;top:72px;width:25px;height:25px;background:var(--copper);color:#fff;text-align:center;line-height:24px;border-radius:50%;z-index:2}.arch-layer:last-child:after{display:none}.arch-layer strong{display:block;color:var(--copper);font-size:13px;letter-spacing:.12em}.arch-layer h3{font-size:20px;margin:13px 0 8px}.arch-layer p{font-size:13px;color:var(--muted);margin:0}
.list-section{background:var(--warm)}.wide-list{display:grid;gap:14px}.wide-item{display:grid;grid-template-columns:90px 1fr 220px auto;align-items:center;gap:25px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:23px 26px;transition:.25s}.wide-item:hover{border-color:var(--copper);box-shadow:var(--shadow);transform:translateX(4px)}.item-no{font:32px Georgia,serif;color:var(--copper)}.wide-item h3{font-size:20px;margin:0 0 5px}.wide-item p{font-size:13px;color:var(--muted);margin:0}.tech-tags{display:flex;flex-wrap:wrap;gap:7px}.tech-tag{display:inline-block;color:var(--teal);border:1px solid #a9bab5;border-radius:4px;padding:2px 8px;font-size:11px}
.coordination-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:center}.image-frame img{width:100%;aspect-ratio:1.2;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow)}.matrix{border-top:1px solid var(--line)}.matrix-row{display:grid;grid-template-columns:150px 1fr;gap:20px;padding:17px 0;border-bottom:1px solid var(--line)}.matrix-row b{font-size:14px}.matrix-row span{font-size:14px;color:var(--muted)}
.scenes{background:var(--graphite);color:#fff}.scene-grid{display:grid;grid-template-columns:1.3fr .7fr .9fr;gap:16px}.scene{min-height:220px;padding:27px;border:1px solid rgba(255,255,255,.15);position:relative;overflow:hidden}.scene:first-child{grid-row:span 2;background:linear-gradient(145deg,rgba(198,106,61,.25),transparent)}.scene small{color:#d98a61;letter-spacing:.12em}.scene h3{font-size:22px;margin:45px 0 8px}.scene p{color:#bfcac4;font-size:13px;margin:0}.scene:first-child h3{font-size:30px}
.performance{background:#fff}.performance-grid{display:grid;grid-template-columns:1fr 1fr;gap:25px}.spec-card{border:1px solid var(--line);border-radius:var(--radius);padding:28px;background:var(--paper)}.spec-card h3{font-size:20px;margin:0 0 18px}.spec-row{display:flex;justify-content:space-between;gap:15px;padding:13px 0;border-bottom:1px solid var(--line);font-size:14px}.spec-row:last-child{border:0}.spec-row span{color:var(--muted);text-align:right}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}.step{position:relative;padding:25px 20px 20px;border-top:3px solid var(--copper);background:#fff}.step:before{counter-increment:step;content:"0" counter(step);font:28px Georgia,serif;color:var(--copper)}.step h3{font-size:18px;margin:14px 0 7px}.step p{font-size:13px;color:var(--muted);margin:0}
.faq-contact{background:var(--warm)}.faq-contact-grid{display:grid;grid-template-columns:1fr .9fr;gap:65px}.accordion-item{border:0;border-bottom:1px solid #cbd1ca;background:transparent}.accordion-button{background:transparent!important;color:var(--ink);font-weight:600;padding:20px 0;box-shadow:none!important}.accordion-button:not(.collapsed){color:var(--copper)}.accordion-body{padding:0 0 20px;color:var(--muted);font-size:14px}.contact-card{background:var(--deep);color:#fff;padding:32px;border-radius:var(--radius)}.contact-card h2{font-size:28px;line-height:1.3;margin:0 0 12px}.contact-card p{color:#bbc8c1;font-size:14px}.form-label{font-size:13px;color:#d5dfda;margin-bottom:5px}.form-control{background:#202a2b;border:1px solid #475656;color:#fff;border-radius:6px;padding:11px 13px}.form-control:focus{background:#202a2b;color:#fff;border-color:var(--copper);box-shadow:0 0 0 3px rgba(198,106,61,.16)}
footer{background:var(--deep);color:#e9ede8;padding:62px 0 24px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.25fr;gap:35px}.footer-brand{font-size:20px;font-weight:800}.footer-brand em{color:var(--copper);font-style:normal}.footer-title{font-size:13px;color:#e18a60;font-weight:700;margin-bottom:15px}.footer-links{display:grid;gap:8px;color:#9eaaa5;font-size:13px}.footer-links a:hover{color:#fff}.footer-note{border-top:1px solid rgba(255,255,255,.12);margin-top:45px;padding-top:18px;color:#81908b;font-size:12px;display:flex;justify-content:space-between;gap:15px}.footer-note a:hover{color:#fff}
@media(max-width:992px){.navbar-nav{gap:0}.nav-link{padding:18px 10px!important}.nav-link.active:after{left:10px;right:10px;bottom:8px}.nav-cta{margin:12px 0 18px}.coordination-grid,.faq-contact-grid{grid-template-columns:1fr;gap:35px}.wide-item{grid-template-columns:70px 1fr auto}.wide-item .tech-tags{grid-column:2}.scene-grid{grid-template-columns:1fr 1fr}.scene:first-child{grid-row:auto}.timeline{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:768px){:root{--space:62px}.topbar .inner{display:none}.page-banner{min-height:390px}.arch-flow{grid-template-columns:1fr}.arch-layer{min-height:auto;border-right:0;border-bottom:1px solid var(--line)}.arch-layer:after{content:"↓";right:50%;top:auto;bottom:-13px}.arch-layer:last-child{border-bottom:0}.wide-item{grid-template-columns:52px 1fr}.wide-item .btn-outline-dark{grid-column:2;justify-self:start}.performance-grid{grid-template-columns:1fr}.scene-grid{grid-template-columns:1fr}.scene:first-child h3{font-size:24px}.footer-grid{grid-template-columns:1fr 1fr}.footer-note{display:block}.footer-note span{display:block;margin-bottom:8px}}
@media(max-width:520px){.container{padding-left:18px;padding-right:18px}.brand{font-size:17px}.brand small{font-size:8px}.page-banner h1{font-size:35px}.page-banner p{font-size:15px}.section-head h2{font-size:29px}.section-head.row-head{display:block}.wide-item{padding:20px 17px;gap:14px}.item-no{font-size:25px}.wide-item h3{font-size:17px}.matrix-row{grid-template-columns:1fr;gap:2px}.timeline{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-note{margin-top:30px}}

/* roulang page: category5 */
:root{
 --ink:#171b1d;--graphite:#202628;--deep:#111719;--paper:#f5f5f1;
 --warm:#ebe9e2;--copper:#c66a3d;--copper-dark:#9d4d2c;--teal:#6c8581;
 --muted:#697372;--line:#d9ddd7;--white:#fff;--radius:14px;
 --shadow:0 16px 38px rgba(22,29,29,.09);--max:1240px;--space:88px
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.75}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:.25s ease}
button,input,textarea{font:inherit}
.container{max-width:var(--max);padding-left:24px;padding-right:24px}
.topbar{background:var(--deep);color:#aebbb7;font-size:12px;letter-spacing:.04em}
.topbar .inner{min-height:34px;display:flex;align-items:center;justify-content:space-between}
.topbar strong{color:#e3e8e2;font-weight:600}
.main-nav{background:rgba(17,23,25,.98);color:#e9ede8;border-bottom:1px solid rgba(255,255,255,.1);position:sticky;top:0;z-index:20}
.navbar{min-height:76px;padding:0}
.brand{font-weight:800;font-size:20px;letter-spacing:-.04em;white-space:nowrap}
.brand small{display:block;color:#81918c;font-size:10px;font-weight:400;letter-spacing:.12em;line-height:1}
.navbar-nav{gap:4px}
.nav-link{color:#b9c4bf!important;padding:27px 12px!important;font-size:14px;position:relative}
.nav-link:hover,.nav-link.active{color:#fff!important}
.nav-link.active:after{content:"";position:absolute;left:12px;right:12px;bottom:17px;height:2px;background:var(--copper)}
.navbar-toggler{border:1px solid #687773;padding:9px}
.navbar-toggler:focus{box-shadow:0 0 0 3px rgba(198,106,61,.28)}
.nav-cta,.btn-copper{background:var(--copper);color:#fff;border:1px solid var(--copper);padding:11px 20px;border-radius:7px;font-weight:600;display:inline-block}
.nav-cta:hover,.btn-copper:hover{background:var(--copper-dark);border-color:var(--copper-dark);color:#fff;transform:translateY(-2px)}
.btn-outline-dark{border:1px solid #63726f;color:var(--ink);padding:11px 20px;border-radius:7px}
.btn-outline-dark:hover{background:var(--graphite);color:#fff}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(198,106,61,.45);outline-offset:3px}
.page-banner{min-height:420px;display:flex;align-items:center;color:#fff;background:linear-gradient(90deg,rgba(13,20,21,.94),rgba(13,20,21,.65)),url('/assets/images/backpic/back-5.webp') center/cover}
.banner-content{padding:76px 0 82px;max-width:850px}
.eyebrow,.section-kicker{color:var(--copper);font-size:12px;letter-spacing:.16em;font-weight:700;text-transform:uppercase}
.page-banner h1{font-size:clamp(34px,5vw,66px);line-height:1.18;letter-spacing:-.055em;margin:17px 0 20px}
.page-banner p{max-width:730px;color:#d8e0db;font-size:17px;margin:0}
section{padding:var(--space) 0}
.section-head{max-width:760px;margin-bottom:38px}
.section-head h2{font-size:clamp(27px,3.4vw,43px);line-height:1.25;letter-spacing:-.04em;margin:10px 0 15px}
.section-head p{color:var(--muted);margin:0;font-size:16px}
.flow-nav{display:grid;grid-template-columns:repeat(5,1fr);border:1px solid var(--line);background:#fff}
.flow-nav div{padding:24px 20px;border-right:1px solid var(--line);position:relative}
.flow-nav div:last-child{border-right:0}
.flow-nav b{display:block;color:var(--copper);font:700 26px Georgia,serif;margin-bottom:10px}
.flow-nav strong{display:block;font-size:16px;margin-bottom:5px}
.flow-nav span{font-size:13px;color:var(--muted)}
.service-list{display:flex;flex-direction:column;gap:15px}
.service-row{display:grid;grid-template-columns:88px 245px 1fr 135px;align-items:center;gap:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 25px;transition:.25s}
.service-row:hover{border-color:var(--copper);box-shadow:var(--shadow);transform:translateX(5px)}
.service-no{font:700 32px Georgia,serif;color:var(--copper)}
.service-row h3{font-size:19px;margin:0}
.service-row p{margin:0;color:var(--muted);font-size:14px}
.badge-tech,.status{display:inline-block;color:var(--teal);border:1px solid #a9bab5;border-radius:4px;padding:3px 9px;font-size:11px;white-space:nowrap}
.status{color:var(--copper-dark);border-color:#d8aa94;text-align:center}
.env-section{background:var(--warm)}
.env-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.env-image img{width:100%;height:365px;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow)}
.env-points{display:grid;grid-template-columns:1fr 1fr;gap:13px}
.env-point{background:#fff;border:1px solid var(--line);padding:19px;border-radius:10px}
.env-point strong{display:block;font-size:16px;margin-bottom:6px}
.env-point span{font-size:13px;color:var(--muted)}
.timeline{border-left:2px solid #c8d0ca;margin-left:14px}
.timeline-item{position:relative;padding:0 0 30px 39px}
.timeline-item:last-child{padding-bottom:0}
.timeline-item:before{content:"";position:absolute;left:-8px;top:5px;width:14px;height:14px;border:3px solid var(--copper);background:var(--paper);border-radius:50%}
.timeline-item b{color:var(--copper);font-size:12px;letter-spacing:.1em}
.timeline-item h3{font-size:18px;margin:5px 0}
.timeline-item p{color:var(--muted);font-size:14px;margin:0}
.protocol-section{background:#fff}
.protocol-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:45px;align-items:start}
.protocol-table{border-top:1px solid var(--line)}
.protocol-line{display:grid;grid-template-columns:170px 1fr;gap:18px;padding:17px 0;border-bottom:1px solid var(--line)}
.protocol-line strong{font-size:14px}.protocol-line span{color:var(--muted);font-size:14px}
.dark-panel{background:var(--deep);color:#fff;border-radius:var(--radius);padding:34px}
.dark-panel h3{font-size:25px;margin:18px 0 10px;line-height:1.35}
.dark-panel p{color:#bdc8c3;font-size:14px}
.metric-strip{background:var(--graphite);color:#fff;padding:42px 0}
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.metric{border-left:1px solid #52635f;padding-left:22px}
.metric b{display:block;font:700 39px Georgia,serif;color:#e18a60;line-height:1.1}
.metric span{display:block;color:#c2ccc6;font-size:13px;margin-top:8px}
.faq-wrap{max-width:900px}
.accordion-item{background:#fff;border:1px solid var(--line)!important;margin-bottom:11px;border-radius:9px!important;overflow:hidden}
.accordion-button{font-weight:600;color:var(--ink);background:#fff;padding:20px 23px;box-shadow:none!important}
.accordion-button:not(.collapsed){color:var(--copper-dark);background:#faf8f3}
.accordion-button:after{filter:none}
.accordion-body{color:var(--muted);font-size:14px;padding:0 23px 22px}
.cta-section{background:var(--copper);color:#fff}
.cta-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:60px;align-items:start}
.cta-section h2{font-size:clamp(28px,4vw,46px);line-height:1.25;margin:12px 0 17px}
.cta-section p{color:#f8e5da}
.form-box{background:#fff;color:var(--ink);padding:28px;border-radius:var(--radius);box-shadow:0 18px 36px rgba(50,25,16,.16)}
.form-label{font-size:13px;font-weight:600;margin-bottom:6px}
.form-control{border:1px solid #ccd4ce;border-radius:7px;padding:11px 13px;background:#fbfcfa}
.form-control:focus{border-color:var(--copper);box-shadow:0 0 0 3px rgba(198,106,61,.16)}
footer{background:var(--deep);color:#e9ede8;padding:62px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1.25fr;gap:35px}
.footer-brand{font-weight:800;font-size:20px}.footer-brand em{color:var(--copper);font-style:normal}
.footer-title{font-weight:700;margin-bottom:15px}
.footer-links{display:flex;flex-direction:column;gap:8px;color:#9eaaa5;font-size:13px}
.footer-links a:hover{color:#fff}.footer-note{display:flex;justify-content:space-between;border-top:1px solid #374342;margin-top:42px;padding-top:18px;color:#7f8d89;font-size:12px}
.footer-note a:hover{color:#fff}
@media(max-width:992px){
 .nav-cta{margin:12px 0 18px}.nav-link{padding:13px 0!important}.nav-link.active:after{left:0;right:auto;width:28px;bottom:5px}
 .flow-nav{grid-template-columns:repeat(3,1fr)}.flow-nav div:nth-child(3){border-right:0}
 .flow-nav div:nth-child(n+4){border-top:1px solid var(--line)}
 .service-row{grid-template-columns:65px 200px 1fr}.service-row .status{grid-column:3}
 .env-grid,.protocol-grid,.cta-grid{grid-template-columns:1fr;gap:35px}
 .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:576px){
 .container{padding-left:18px;padding-right:18px}
 .topbar .inner{padding-top:7px;padding-bottom:7px}.topbar .inner span:last-child{display:none}
 .brand{font-size:17px}.brand small{font-size:8px}
 .page-banner{min-height:390px}.banner-content{padding:65px 0 75px}.page-banner h1{font-size:38px}
 section{padding:64px 0}.section-head{margin-bottom:28px}
 .flow-nav{grid-template-columns:1fr 1fr}.flow-nav div{border-right:0;border-bottom:1px solid var(--line)}.flow-nav div:nth-child(odd){border-right:1px solid var(--line)}.flow-nav div:last-child{border-bottom:0}
 .service-row{grid-template-columns:55px 1fr;gap:10px 15px;padding:19px}.service-row p{grid-column:1/-1}.service-row .status{grid-column:2;justify-self:start}
 .env-image img{height:250px}.env-points{grid-template-columns:1fr}
 .protocol-line{grid-template-columns:1fr;gap:3px}
 .dark-panel{padding:25px 21px}.metric-grid{grid-template-columns:1fr 1fr;gap:28px 15px}.metric{padding-left:12px}.metric b{font-size:31px}
 .cta-grid{gap:25px}.form-box{padding:21px 17px}
 .footer-grid{grid-template-columns:1fr;gap:27px}.footer-note{display:block;line-height:2}
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}