/* roulang page: index */
:root{
            --blue:#1769d3;--blue-dark:#103b72;--blue-soft:#eaf3ff;--cyan:#21a9a2;
            --ink:#15263d;--muted:#607087;--line:#dce6f1;--warm:#f8fbfe;--white:#fff;
            --radius:18px;--shadow:0 16px 40px rgba(29,75,126,.10);--shadow-hover:0 22px 45px rgba(29,75,126,.16);
        }
        *,*:before,*:after{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;background:var(--warm);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;line-height:1.75;overflow-x:hidden}
        a{color:inherit;text-decoration:none;transition:.25s ease}
        img{max-width:100%;height:auto;display:block}
        button,input,textarea{font:inherit}
        .container{max-width:1180px}
        .topline{background:#103b72;color:#dcecff;font-size:13px}
        .topline .container{min-height:38px;display:flex;align-items:center;justify-content:space-between}
        .topline strong{color:#fff;font-weight:600}
        .mainnav{background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
        .navbar{min-height:78px}
        .brand{display:flex;align-items:center;gap:11px;font-size:20px;font-weight:700;color:var(--blue-dark);white-space:nowrap}
        .brand-mark{width:38px;height:38px;border-radius:11px;background:var(--blue);position:relative;box-shadow:0 8px 18px rgba(23,105,211,.25)}
        .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:3px}
        .brand-mark:before{width:20px;height:5px;left:9px;top:11px;box-shadow:0 9px 0 #a8ddda}
        .brand-mark:after{width:5px;height:20px;left:17px;top:9px}
        .nav-link{color:#53657b!important;font-size:14px;font-weight:600;padding:10px 12px!important;border-bottom:2px solid transparent}
        .nav-link:hover,.nav-link.active{color:var(--blue)!important;border-bottom-color:var(--blue)}
        .nav-cta{padding:10px 17px;border-radius:9px;background:var(--blue);color:#fff;font-size:14px;font-weight:600}
        .nav-cta:hover{background:#0f54ad;color:#fff;transform:translateY(-1px)}
        .navbar-toggler{border:1px solid var(--line);padding:8px 10px}
        .navbar-toggler:focus{box-shadow:0 0 0 3px rgba(23,105,211,.16)}
        .hero{min-height:610px;background:linear-gradient(105deg,rgba(248,251,254,.98) 34%,rgba(234,243,255,.72)),url("/assets/images/backpic/back-1.webp") center/cover;display:flex;align-items:center;position:relative}
        .hero:after{content:"";position:absolute;right:5%;top:18%;width:260px;height:260px;border:1px solid rgba(23,105,211,.18);border-radius:50%;box-shadow:0 0 0 30px rgba(23,105,211,.04),0 0 0 60px rgba(23,105,211,.03)}
        .hero-inner{position:relative;z-index:1}
        .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.08em}
        .eyebrow:before,.section-kicker:before{content:"";width:22px;height:2px;background:var(--cyan)}
        h1{font-size:clamp(36px,5vw,64px);line-height:1.2;letter-spacing:-.04em;font-weight:700;max-width:720px;margin:20px 0}
        h2{font-size:clamp(27px,3vw,40px);line-height:1.3;letter-spacing:-.025em;margin:10px 0 15px;font-weight:700}
        h3{font-size:20px;line-height:1.45;font-weight:700}
        .hero p{font-size:18px;color:var(--muted);max-width:680px;margin-bottom:28px}
        .btn-main,.btn-lightline{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border-radius:9px;font-weight:700;border:1px solid var(--blue)}
        .btn-main{background:var(--blue);color:#fff}.btn-main:hover{background:#0d55b0;color:#fff;transform:translateY(-2px)}
        .btn-lightline{color:var(--blue);background:#fff;margin-left:10px}.btn-lightline:hover{background:var(--blue-soft);color:var(--blue-dark)}
        .btn-main:focus,.btn-lightline:focus,.nav-cta:focus{outline:3px solid rgba(33,169,162,.35);outline-offset:3px}
        .metric-row{display:flex;flex-wrap:wrap;gap:0;margin-top:46px;border-top:1px solid var(--line);max-width:760px}
        .metric{min-width:165px;padding:19px 24px 0 0;margin-right:24px;border-right:1px solid var(--line)}
        .metric:last-child{border:0}.metric b{display:block;font-size:25px;color:var(--blue-dark)}.metric span{font-size:13px;color:var(--muted)}
        .section{padding:100px 0}.section-head{max-width:710px;margin-bottom:42px}.section-head p{color:var(--muted);margin:0;font-size:16px}
        .pain-layout{display:grid;grid-template-columns:1fr 1.25fr;gap:70px;align-items:center}
        .pain-image img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;aspect-ratio:1.2;object-fit:cover}
        .issue-list{border-top:1px solid var(--line)}.issue{display:flex;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}
        .issue-num{font-size:14px;color:var(--blue);font-weight:700;min-width:30px}.issue p{margin:4px 0 0;color:var(--muted);font-size:15px}
        .architecture{background:#fff}.arch-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
        .arch-visual{padding:28px;border:1px solid var(--line);border-radius:var(--radius);background:#f5f9fe}
        .layer{padding:18px 22px;border-radius:12px;margin:12px 0;display:flex;justify-content:space-between;align-items:center;font-weight:600;border-left:4px solid var(--blue)}
        .layer small{color:var(--muted);font-weight:400}.layer:nth-child(2){background:#e5f1ff}.layer:nth-child(3){background:#e7f6f3;border-color:var(--cyan)}.layer:nth-child(4){background:#f0edff;border-color:#7f74cb}
        .feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.feature-card,.product-card,.quote-card,.scene-card,.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:0 8px 25px rgba(29,75,126,.05);transition:.25s}
        .feature-card:hover,.product-card:hover,.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:#acd0f7}
        .feature-card:nth-child(2),.feature-card:nth-child(5){margin-top:26px}.feature-card:nth-child(3){margin-top:52px}
        .num{color:var(--blue);font-size:13px;font-weight:700;display:block;margin-bottom:22px}.feature-card p,.product-card p,.scene-card p,.news-card p{color:var(--muted);font-size:14px;margin-bottom:0}
        .product-strip{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:18px}.product-card{padding:0;overflow:hidden}.product-card img{width:100%;height:190px;object-fit:cover}.product-card div{padding:24px}.product-card:first-child{background:#103b72;color:#fff}.product-card:first-child p{color:#c8d9ee}.product-card:first-child h3{color:#fff}
        .timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}.timeline:before{content:"";position:absolute;top:22px;left:5%;right:5%;height:2px;background:#b9d3ee}.step{position:relative;z-index:1;padding-right:18px}.step-dot{width:44px;height:44px;border-radius:50%;background:#fff;border:2px solid var(--blue);color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:700;margin-bottom:20px}.step p{color:var(--muted);font-size:14px}
        .dark-case{background:#112b4c;color:#fff}.dark-case .section-head p{color:#b9cce1}.case-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:70px;align-items:center}.case-layout p{color:#c6d5e5}.case-stat{border-left:1px solid #496784;padding-left:30px}.case-stat strong{font-size:58px;color:#82d7d0;display:block;line-height:1}.case-stat span{color:#d3e0ec}
        .data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.data-box{padding:28px;background:#fff;border:1px solid var(--line);border-radius:14px}.data-box strong{font-size:35px;color:var(--blue-dark);display:block}.data-box span{font-size:14px;color:var(--muted)}
        .quotes{display:flex;gap:18px;overflow-x:auto;padding-bottom:15px}.quote-card{min-width:360px}.quote-card p{font-size:17px;color:#344b65}.quote-card small{color:var(--blue);font-weight:600}
        .scene-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.scene-card{padding:22px 18px;min-height:175px}.scene-card h3{font-size:17px}
        .trust{background:#fff}.trust-grid{display:grid;grid-template-columns:1fr 1fr;gap:25px}.trust-item{padding:22px 25px;border:1px solid var(--line);border-radius:12px}.trust-item strong{display:block;color:var(--blue-dark)}.trust-item span{color:var(--muted);font-size:14px}
        .news-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:25px}.news-card img{width:100%;height:170px;object-fit:cover;border-radius:12px;margin-bottom:20px}.news-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:10px 25px}.news-link{display:block;padding:19px 0;border-bottom:1px solid var(--line);font-weight:600}.news-link:last-child{border:0}.news-link span{display:block;color:var(--muted);font-size:13px;font-weight:400}
        .accordion-item{border:1px solid var(--line)!important;margin-bottom:12px;border-radius:10px!important;overflow:hidden}.accordion-button{font-weight:600;color:var(--ink);background:#fff;padding:20px 22px}.accordion-button:not(.collapsed){color:var(--blue-dark);background:var(--blue-soft);box-shadow:none}.accordion-button:focus{box-shadow:0 0 0 3px rgba(23,105,211,.12)}.accordion-body{color:var(--muted);padding:0 22px 20px;background:var(--blue-soft)}
        .indicator{background:#eef6ff}.indicator-row{display:grid;grid-template-columns:160px 1fr 70px;gap:20px;align-items:center;margin:19px 0;font-size:14px}.bar{height:9px;background:#d6e4f3;border-radius:10px;overflow:hidden}.bar i{display:block;height:100%;background:var(--blue);border-radius:10px}
        .cta{background:linear-gradient(105deg,#eaf4ff,#cfe4ff);padding:78px 0}.cta-layout{display:flex;justify-content:space-between;align-items:center;gap:30px}.cta p{color:var(--muted);max-width:630px}
        footer{background:#102b4c;color:#c0d0e2;padding:55px 0 25px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}.footer-brand{color:#fff;font-size:21px;font-weight:700}.footer-title{color:#fff;font-weight:700;margin-bottom:15px}.footer-links a{display:block;color:#b7c9dc;font-size:14px;margin:8px 0}.footer-links a:hover{color:#fff}.copyright{border-top:1px solid #36516c;margin-top:40px;padding-top:20px;font-size:13px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
        @media(max-width:991px){.navbar-nav{padding:15px 0}.nav-cta{display:inline-flex;margin-top:8px}.pain-layout,.arch-grid,.case-layout,.news-layout{grid-template-columns:1fr;gap:35px}.feature-grid{grid-template-columns:repeat(2,1fr)}.feature-card:nth-child(2),.feature-card:nth-child(5),.feature-card:nth-child(3){margin-top:0}.product-strip{grid-template-columns:1fr 1fr}.product-card:first-child{grid-column:span 2}.scene-grid{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}
        @media(max-width:575px){.topline .container{padding:7px 18px;display:block;text-align:center}.topline .top-contact{display:none}.navbar{min-height:68px}.brand{font-size:17px}.brand-mark{width:33px;height:33px}.hero{min-height:650px}.hero p{font-size:16px}.btn-main,.btn-lightline{width:100%;margin:5px 0}.metric{min-width:45%;margin-right:8px;padding-right:8px}.metric b{font-size:21px}.section{padding:68px 0}.feature-grid,.product-strip,.trust-grid{grid-template-columns:1fr}.product-card:first-child{grid-column:auto}.timeline{display:block}.timeline:before{left:21px;top:22px;bottom:25px;width:2px;height:auto;right:auto}.step{display:grid;grid-template-columns:44px 1fr;gap:18px;padding:0 0 25px}.step h3,.step p{grid-column:2;margin-top:-58px;padding-top:58px}.step p{margin-top:-18px;padding-top:18px}.data-grid{grid-template-columns:repeat(2,1fr)}.scene-grid{grid-template-columns:1fr 1fr}.quote-card{min-width:285px}.indicator-row{grid-template-columns:105px 1fr 48px;gap:8px;font-size:12px}.cta-layout{display:block}.footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin-top:8px}h1{font-size:39px}}

/* roulang page: category2 */
:root{
      --blue:#1769d3;--blue-dark:#103b72;--blue-soft:#eaf3ff;--cyan:#21a9a2;
      --ink:#15263d;--muted:#607087;--line:#dce6f1;--warm:#f8fbfe;--white:#fff;
      --radius:18px;--shadow:0 16px 40px rgba(29,75,126,.10);--shadow-hover:0 22px 45px rgba(29,75,126,.16);
    }
    *,*:before,*:after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--warm);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;line-height:1.75;overflow-x:hidden}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{max-width:100%;height:auto;display:block}
    button,input,textarea{font:inherit}
    .container{max-width:1180px}
    .topline{background:var(--blue-dark);color:#d9e8f8;font-size:13px}
    .topline .container{min-height:38px;display:flex;align-items:center;justify-content:space-between}
    .top-contact{color:#b8cde3}
    .mainnav{background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .navbar{min-height:78px}
    .brand{display:flex;align-items:center;gap:11px;font-size:20px;font-weight:700;color:var(--blue-dark);white-space:nowrap}
    .brand-mark{width:38px;height:38px;border-radius:11px;background:var(--blue);position:relative;box-shadow:0 8px 18px rgba(23,105,211,.25)}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:3px}
    .brand-mark:before{width:20px;height:5px;left:9px;top:11px;box-shadow:0 9px 0 #a8ddda}
    .brand-mark:after{width:5px;height:20px;left:17px;top:9px}
    .nav-link{color:#53657b!important;font-size:14px;font-weight:600;padding:10px 12px!important;border-bottom:2px solid transparent}
    .nav-link:hover,.nav-link.active{color:var(--blue)!important;border-bottom-color:var(--blue)}
    .nav-cta,.btn-main{display:inline-flex;align-items:center;justify-content:center;background:var(--blue);color:#fff;font-weight:700;border-radius:9px;border:1px solid var(--blue)}
    .nav-cta{padding:10px 17px;font-size:14px}
    .nav-cta:hover,.btn-main:hover{background:#0f54ad;color:#fff;transform:translateY(-2px)}
    .navbar-toggler{border:1px solid var(--line);padding:8px 10px}
    .navbar-toggler:focus{box-shadow:0 0 0 3px rgba(23,105,211,.16)}
    .page-banner{padding:88px 0 78px;background:linear-gradient(105deg,rgba(248,251,254,.96),rgba(234,243,255,.78)),url("/assets/images/backpic/back-4.webp") center/cover;border-bottom:1px solid var(--line)}
    .breadcrumb{font-size:13px;color:var(--muted);margin-bottom:28px}
    .breadcrumb a{color:var(--blue)}
    .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.08em}
    .eyebrow:before,.section-kicker:before{content:"";width:22px;height:2px;background:var(--cyan)}
    h1{font-size:clamp(34px,5vw,58px);line-height:1.18;letter-spacing:-.04em;font-weight:700;margin:16px 0 20px;color:var(--blue-dark)}
    h2{font-size:clamp(27px,3vw,38px);line-height:1.3;margin:12px 0 16px;color:var(--blue-dark);font-weight:700}
    h3{font-size:19px;line-height:1.4;margin:0 0 10px;color:var(--blue-dark)}
    .banner-copy{max-width:720px;color:var(--muted);font-size:18px}
    .banner-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:27px}
    .tag{display:inline-flex;padding:6px 12px;border-radius:30px;background:#fff;border:1px solid #cfe0f1;color:var(--blue-dark);font-size:13px;font-weight:600}
    .section{padding:92px 0}
    .section-head{max-width:720px;margin-bottom:42px}
    .section-head p{color:var(--muted);margin:0;font-size:16px}
    .overview-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:55px;align-items:center}
    .overview-image{position:relative}
    .overview-image img{width:100%;aspect-ratio:1.15;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow)}
    .floating-note{position:absolute;right:-22px;bottom:25px;background:#fff;border-left:4px solid var(--cyan);padding:18px 20px;border-radius:12px;box-shadow:var(--shadow);max-width:225px;font-size:14px;color:var(--muted)}
    .layer-list{border-top:1px solid var(--line)}
    .layer-item{display:grid;grid-template-columns:56px 1fr auto;gap:20px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line)}
    .layer-num{color:var(--cyan);font-size:23px;font-weight:700}
    .layer-item p{margin:0;color:var(--muted);font-size:14px}
    .layer-arrow{color:var(--blue);font-size:22px}
    .feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
    .feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:0 8px 25px rgba(29,75,126,.05);transition:.25s}
    .feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:#acd0f7}
    .feature-card:nth-child(2),.feature-card:nth-child(4){margin-top:27px}
    .card-index{color:var(--cyan);font-weight:700;font-size:13px;letter-spacing:.08em;margin-bottom:25px}
    .feature-card p,.scene-box p,.metric-note{color:var(--muted);font-size:14px;margin:0}
    .feature-card .tag{margin-top:20px;background:var(--blue-soft);border:0}
    .scene-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:12px}
    .scene-row{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:12px;padding:18px;border-bottom:1px solid var(--line);align-items:center}
    .scene-row:last-child{border-bottom:0}
    .scene-row strong{color:var(--blue-dark)}
    .scene-row span{font-size:14px;color:var(--muted)}
    .scene-row .scene-label{color:var(--blue);font-weight:600}
    .metric-band{background:#103b72;color:#fff;padding:74px 0}
    .metric-band h2{color:#fff}
    .metric-band .section-kicker{color:#9bd9d4}
    .metric-band .section-kicker:before{background:#9bd9d4}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.18);margin-top:38px}
    .metric-box{padding:27px 22px;background:#103b72}
    .metric-box strong{display:block;font-size:38px;color:#fff;line-height:1.2}
    .metric-box span{display:block;color:#bdd0e5;font-size:14px;margin-top:9px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);position:relative;margin-top:45px}
    .timeline:before{content:"";position:absolute;top:16px;left:8%;right:8%;height:2px;background:#c8dced}
    .step{position:relative;padding:48px 20px 0;text-align:center}
    .step-dot{position:absolute;top:7px;left:50%;transform:translateX(-50%);width:20px;height:20px;background:var(--cyan);border:5px solid var(--warm);border-radius:50%;box-shadow:0 0 0 2px var(--cyan)}
    .step p{font-size:14px;color:var(--muted);margin:0}
    .faq-list{max-width:900px}
    .accordion-item{border:1px solid var(--line)!important;margin-bottom:12px;border-radius:10px!important;overflow:hidden}
    .accordion-button{font-weight:600;color:var(--ink);background:#fff;padding:20px 22px}
    .accordion-button:not(.collapsed){color:var(--blue-dark);background:var(--blue-soft);box-shadow:none}
    .accordion-button:focus{box-shadow:0 0 0 3px rgba(23,105,211,.12)}
    .accordion-body{color:var(--muted);padding:0 22px 20px;background:var(--blue-soft)}
    .cta{background:linear-gradient(105deg,#eaf4ff,#cfe4ff);padding:72px 0}
    .cta-layout{display:flex;justify-content:space-between;align-items:center;gap:30px}
    .cta p{color:var(--muted);max-width:650px}
    .btn-main{min-height:48px;padding:0 22px}
    footer{background:#102b4c;color:#c0d0e2;padding:55px 0 25px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.25fr;gap:35px}
    .footer-brand{color:#fff;font-size:21px;font-weight:700}
    .footer-title{color:#fff;font-weight:700;margin-bottom:15px}
    .footer-grid p{font-size:14px;color:#b8cbe0}
    .footer-links{display:flex;flex-direction:column;gap:8px;font-size:14px}
    .footer-links a:hover{color:#fff;padding-left:3px}
    .copyright{border-top:1px solid rgba(255,255,255,.15);margin-top:40px;padding-top:20px;display:flex;justify-content:space-between;gap:15px;font-size:13px;color:#9fb4cb}
    @media(max-width:991px){
      .topline .container{padding:8px 18px;gap:10px;align-items:flex-start}.top-contact{font-size:12px;text-align:right}
      .navbar{padding:14px 18px}.navbar-collapse{padding-top:16px}.nav-cta{display:inline-flex;margin-top:10px}
      .overview-layout{grid-template-columns:1fr;gap:35px}.floating-note{right:15px}
      .metric-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:767px){
      .section{padding:65px 0}.page-banner{padding:58px 0}.banner-copy{font-size:16px}
      .feature-grid{grid-template-columns:1fr}.feature-card:nth-child(2),.feature-card:nth-child(4){margin-top:0}
      .scene-row{grid-template-columns:1fr;gap:5px}.timeline{grid-template-columns:1fr 1fr;row-gap:22px}.timeline:before{display:none}
      .step{padding-top:42px}.cta-layout{display:block}.cta-layout .btn-main{margin-top:12px}
    }
    @media(max-width:520px){
      .topline .container{display:block}.top-contact{display:block;text-align:left;margin-top:2px}
      .brand{font-size:17px}.brand-mark{width:34px;height:34px}.metric-grid{grid-template-columns:1fr 1fr}
      .metric-box{padding:22px 15px}.metric-box strong{font-size:29px}.footer-grid{grid-template-columns:1fr;gap:24px}
      .copyright{display:block}.copyright span{display:block;margin-bottom:6px}.floating-note{position:relative;right:auto;bottom:auto;margin:-20px 15px 0}
    }

/* roulang page: category1 */
:root{--blue:#1769d3;--blue-dark:#103b72;--blue-soft:#eaf3ff;--cyan:#21a9a2;--ink:#15263d;--muted:#607087;--line:#dce6f1;--warm:#f8fbfe;--white:#fff;--radius:18px;--shadow:0 16px 40px rgba(29,75,126,.1);--shadow-hover:0 22px 45px rgba(29,75,126,.16)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--warm);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none;transition:.25s ease}img{display:block;max-width:100%;height:auto}button,input,textarea{font:inherit}.container{max-width:1180px}.topline{background:#103b72;color:#d8e8f8;font-size:13px}.topline .container{min-height:38px;display:flex;align-items:center;justify-content:space-between}.mainnav{background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}.navbar{min-height:78px}.brand{display:flex;align-items:center;gap:11px;font-size:20px;font-weight:700;color:var(--blue-dark);white-space:nowrap}.brand-mark{width:38px;height:38px;border-radius:11px;background:var(--blue);position:relative;box-shadow:0 8px 18px rgba(23,105,211,.25)}.brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:3px}.brand-mark:before{width:20px;height:5px;left:9px;top:11px;box-shadow:0 9px 0 #a8ddda}.brand-mark:after{width:5px;height:20px;left:17px;top:9px}.nav-link{color:#53657b!important;font-size:14px;font-weight:600;padding:10px 12px!important;border-bottom:2px solid transparent}.nav-link:hover,.nav-link.active{color:var(--blue)!important;border-bottom-color:var(--blue)}.nav-cta,.btn-main{background:var(--blue);color:#fff;border-radius:9px;font-weight:700}.nav-cta{padding:10px 17px;font-size:14px}.nav-cta:hover,.btn-main:hover{background:#0f54ad;color:#fff;transform:translateY(-2px)}.navbar-toggler{border:1px solid var(--line);padding:8px 10px}.navbar-toggler:focus{box-shadow:0 0 0 3px rgba(23,105,211,.16)}.page-hero{padding:78px 0 72px;background:linear-gradient(105deg,#f8fbfe 30%,#eaf3ff 100%);position:relative;overflow:hidden}.page-hero:after{content:"";position:absolute;width:360px;height:360px;border:1px solid rgba(23,105,211,.15);border-radius:50%;right:-80px;top:-150px;box-shadow:0 0 0 35px rgba(23,105,211,.035),0 0 0 70px rgba(23,105,211,.025)}.eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.08em}.eyebrow:before,.section-kicker:before{content:"";width:22px;height:2px;background:var(--cyan)}h1{font-size:clamp(36px,5vw,62px);line-height:1.18;letter-spacing:-.04em;font-weight:700;margin:18px 0 20px;color:var(--blue-dark)}h2{font-size:clamp(27px,3vw,40px);line-height:1.3;margin:12px 0 16px;color:var(--blue-dark)}h3{font-size:20px;line-height:1.4;color:var(--blue-dark)}.page-hero p{max-width:700px;color:var(--muted);font-size:18px}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:18px}.breadcrumb a{color:var(--blue)}.section{padding:92px 0}.section-head{max-width:700px;margin-bottom:38px}.section-head p{color:var(--muted);margin:0}.capability-band{display:grid;grid-template-columns:1.1fr 2fr;gap:28px;align-items:stretch}.band-intro{background:var(--blue-dark);color:#fff;border-radius:var(--radius);padding:34px}.band-intro h2{color:#fff}.band-intro p{color:#c7d8eb}.band-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.band-item,.platform-card,.scene-box,.faq-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 25px rgba(29,75,126,.05)}.band-item{padding:25px 20px}.band-item b{display:block;color:var(--blue);font-size:25px;margin-bottom:7px}.band-item span{font-size:14px;color:var(--muted)}.platform-layout{display:grid;grid-template-columns:1fr 1.25fr;gap:55px;align-items:center}.platform-image{position:relative}.platform-image img{width:100%;height:370px;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow)}.platform-image .image-note{position:absolute;right:-18px;bottom:24px;background:#fff;padding:17px 20px;border-radius:12px;box-shadow:var(--shadow);font-size:14px;color:var(--blue-dark)}.layer-list{margin:28px 0 0;padding:0;list-style:none}.layer-list li{display:flex;gap:16px;padding:17px 0;border-bottom:1px solid var(--line)}.layer-list strong{min-width:110px;color:var(--blue)}.layer-list span{color:var(--muted);font-size:14px}.platform-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.platform-card{padding:25px;transition:.25s}.platform-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:#acd0f7}.number{display:inline-flex;color:var(--blue);font-size:13px;font-weight:700;background:var(--blue-soft);border-radius:20px;padding:3px 10px;margin-bottom:14px}.platform-card p,.scene-box p{color:var(--muted);font-size:14px;margin:0}.platform-card:nth-child(2){margin-top:22px}.platform-card:nth-child(4){margin-top:-12px}.scene-section{background:#f0f6fc}.scene-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:18px}.scene-box{padding:26px;min-height:190px}.scene-box.wide{grid-row:span 2;display:flex;flex-direction:column;justify-content:center;background:url("/assets/images/coverpic/cover-4.webp") center/cover;color:#fff;position:relative;overflow:hidden}.scene-box.wide:before{content:"";position:absolute;inset:0;background:rgba(16,59,114,.78)}.scene-box.wide>*{position:relative}.scene-box.wide h3{color:#fff}.tag{display:inline-block;color:var(--cyan);background:#e7f7f5;border-radius:20px;padding:4px 10px;font-size:12px;font-weight:700;margin:0 5px 8px 0}.spec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.spec{padding:25px 20px;border-top:3px solid var(--blue);background:#fff;border-radius:0 0 13px 13px;box-shadow:0 8px 25px rgba(29,75,126,.05)}.spec strong{display:block;font-size:28px;color:var(--blue-dark);line-height:1.2;margin-bottom:8px}.spec span{color:var(--muted);font-size:14px}.timeline{display:grid;grid-template-columns:repeat(5,1fr);position:relative;gap:15px}.timeline:before{content:"";height:2px;background:#b8d2ed;position:absolute;left:5%;right:5%;top:25px}.step{position:relative;text-align:center}.step i{display:flex;align-items:center;justify-content:center;margin:0 auto 18px;width:52px;height:52px;border-radius:50%;background:#fff;border:2px solid var(--blue);color:var(--blue);font-style:normal;font-weight:700;position:relative;z-index:1}.step h3{font-size:16px}.step p{font-size:13px;color:var(--muted)}.faq-wrap{padding:10px 22px}.accordion-item{border:0!important;border-bottom:1px solid var(--line)!important;margin:0!important;border-radius:0!important}.accordion-item:last-child{border-bottom:0!important}.accordion-button{font-weight:600;color:var(--ink);background:#fff;padding:21px 4px}.accordion-button:not(.collapsed){color:var(--blue-dark);background:var(--blue-soft);box-shadow:none}.accordion-button:focus{box-shadow:0 0 0 3px rgba(23,105,211,.12)}.accordion-body{color:var(--muted);padding:0 4px 20px;background:var(--blue-soft)}.cta{background:linear-gradient(105deg,#eaf4ff,#cfe4ff);padding:70px 0}.cta-layout{display:flex;justify-content:space-between;align-items:center;gap:30px}.cta p{color:var(--muted);max-width:650px}.btn-main{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border:1px solid var(--blue)}footer{background:#102b4c;color:#c0d0e2;padding:55px 0 25px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:35px}.footer-brand{font-size:21px;font-weight:700;color:#fff}.footer-title{color:#fff;font-weight:700;margin-bottom:15px}.footer-links{display:flex;flex-direction:column;gap:9px;font-size:14px}.footer-links a:hover{color:#fff}.copyright{display:flex;justify-content:space-between;border-top:1px solid rgba(255,255,255,.15);margin-top:38px;padding-top:19px;font-size:12px;color:#9fb3c9}@media(max-width:991px){.nav-link{padding:12px 0!important}.nav-cta{display:inline-block;margin:8px 0 15px}.capability-band,.platform-layout{grid-template-columns:1fr;gap:25px}.scene-grid{grid-template-columns:1fr 1fr}.scene-box.wide{grid-row:auto}.footer-grid{grid-template-columns:1fr 1fr}.timeline{grid-template-columns:repeat(3,1fr);gap:24px}.timeline:before{display:none}}@media(max-width:767px){.topline .container{padding:7px 18px;display:block}.top-contact{display:block;margin-top:2px}.page-hero{padding:55px 0}.section{padding:65px 0}.band-list,.platform-grid,.spec-grid,.scene-grid{grid-template-columns:1fr}.platform-card:nth-child(2),.platform-card:nth-child(4){margin-top:0}.platform-image img{height:270px}.platform-image .image-note{right:12px}.timeline{grid-template-columns:1fr 1fr}.cta-layout{display:block}.cta .btn-main{margin-top:14px}.copyright{display:block}.copyright span{display:block;margin-top:7px}}@media(max-width:520px){h1{font-size:36px}.brand{font-size:17px}.brand-mark{width:34px;height:34px}.hero p,.page-hero p{font-size:16px}.timeline{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.section-head{margin-bottom:27px}}

/* roulang page: category3 */
:root{
--blue:#1769d3;--blue-dark:#103b72;--blue-soft:#eaf3ff;--cyan:#21a9a2;
--ink:#15263d;--muted:#607087;--line:#dce6f1;--warm:#f8fbfe;--white:#fff;
--radius:18px;--shadow:0 16px 40px rgba(29,75,126,.10);--shadow-hover:0 22px 45px rgba(29,75,126,.16)
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--warm);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none;transition:.25s ease}img{max-width:100%;height:auto;display:block}button,input,textarea{font:inherit}.container{max-width:1180px}.topline{background:#f0f6fd;border-bottom:1px solid #dfebf7;color:#59708b;font-size:13px}.topline strong{color:var(--blue-dark);font-weight:700}.topline .container{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}.mainnav{background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}.navbar{min-height:78px}.brand{display:flex;align-items:center;gap:11px;font-size:20px;font-weight:700;color:var(--blue-dark);white-space:nowrap}.brand-mark{width:38px;height:38px;border-radius:11px;background:var(--blue);position:relative;box-shadow:0 8px 18px rgba(23,105,211,.25)}.brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:3px}.brand-mark:before{width:20px;height:5px;left:9px;top:11px;box-shadow:0 9px 0 #a8ddda}.brand-mark:after{width:5px;height:20px;left:17px;top:9px}.nav-link{color:#53657b!important;font-size:14px;font-weight:600;padding:10px 12px!important;border-bottom:2px solid transparent}.nav-link:hover,.nav-link.active{color:var(--blue)!important;border-bottom-color:var(--blue)}.nav-cta{padding:10px 17px;border-radius:9px;background:var(--blue);color:#fff;font-size:14px;font-weight:700}.nav-cta:hover{background:#0f54ad;color:#fff;transform:translateY(-1px)}.navbar-toggler{border:1px solid var(--line);padding:8px 10px}.navbar-toggler:focus{box-shadow:0 0 0 3px rgba(23,105,211,.16)}
.page-intro{padding:70px 0 62px;background:linear-gradient(110deg,#f8fbfe 5%,#e8f3ff 58%,#f8fbfe 100%);border-bottom:1px solid var(--line);position:relative;overflow:hidden}.page-intro:after{content:"";width:320px;height:320px;border:1px solid rgba(23,105,211,.17);border-radius:50%;position:absolute;right:-70px;top:-135px;box-shadow:0 0 0 35px rgba(23,105,211,.035),0 0 0 70px rgba(23,105,211,.025)}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:22px}.breadcrumb a:hover{color:var(--blue)}.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.08em}.section-kicker:before{content:"";width:22px;height:2px;background:var(--cyan)}h1,h2,h3,h4{line-height:1.35;margin-top:0;color:var(--ink)}h1{font-size:42px;font-weight:700;letter-spacing:-.03em;max-width:770px;margin:14px 0 18px}.intro-text{max-width:760px;color:var(--muted);font-size:17px;margin:0}.intro-side{position:relative;z-index:1;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:23px;box-shadow:var(--shadow)}.intro-side span{font-size:13px;color:var(--blue);font-weight:700}.intro-side strong{display:block;font-size:19px;margin:7px 0}.intro-side p{font-size:14px;color:var(--muted);margin:0}.section{padding:90px 0}.section-soft{background:#f1f7fd}.section-head{max-width:730px;margin-bottom:38px}.section-head h2{font-weight:700;font-size:31px;margin:10px 0 13px}.section-head p{margin:0;color:var(--muted)}.capability-map{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:stretch}.map-core{border-radius:var(--radius);background:var(--blue-dark);padding:38px;color:#fff;position:relative;overflow:hidden}.map-core:after{content:"";position:absolute;right:-60px;bottom:-80px;width:250px;height:250px;border-radius:50%;border:1px solid rgba(255,255,255,.18);box-shadow:0 0 0 30px rgba(255,255,255,.04)}.map-core h3{color:#fff;font-size:27px;position:relative;z-index:1}.map-core p{color:#c7d9eb;max-width:450px;position:relative;z-index:1}.layer-list{position:relative;z-index:1;margin-top:28px}.layer{padding:12px 16px;margin-top:10px;border-radius:9px;background:rgba(255,255,255,.10);border-left:3px solid #83d8d2;font-size:14px}.map-points{display:grid;grid-template-columns:1fr 1fr;gap:15px}.point{padding:24px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 8px 25px rgba(29,75,126,.05)}.point:nth-child(2){margin-top:30px}.point:nth-child(3){margin-top:-10px}.point b{display:block;color:var(--blue-dark);font-size:17px;margin:8px 0}.point p{font-size:14px;color:var(--muted);margin:0}.number{display:inline-flex;width:29px;height:29px;align-items:center;justify-content:center;background:var(--blue-soft);color:var(--blue);font-size:12px;font-weight:700;border-radius:8px}
.product-grid{display:grid;grid-template-columns:1.15fr .85fr .85fr;gap:18px}.eco-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 8px 25px rgba(29,75,126,.05);transition:.25s}.eco-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:#acd0f7}.eco-card img{width:100%;height:170px;object-fit:cover}.eco-card:first-child img{height:224px}.eco-card-body{padding:23px}.eco-card h3{font-size:20px;margin:10px 0}.eco-card p{font-size:14px;color:var(--muted);margin:0 0 16px}.tag{display:inline-block;padding:4px 9px;border-radius:6px;background:var(--blue-soft);color:var(--blue);font-size:12px;font-weight:700;margin-right:5px}.detail-link{font-size:14px;color:var(--blue);font-weight:700}.detail-link:hover{color:var(--blue-dark);text-decoration:underline}.scenario-layout{display:grid;grid-template-columns:.88fr 1.12fr;gap:36px;align-items:center}.scenario-image{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);position:relative}.scenario-image img{width:100%;height:455px;object-fit:cover}.scenario-image:after{content:"多屏服务状态统一管理";position:absolute;left:18px;bottom:18px;background:rgba(16,59,114,.91);color:#fff;padding:9px 14px;border-radius:8px;font-size:13px;font-weight:700}.scenario-list{border-top:1px solid var(--line)}.scenario-item{display:grid;grid-template-columns:52px 1fr;gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}.scenario-item strong{display:block;font-size:17px;margin-bottom:3px}.scenario-item p{color:var(--muted);font-size:14px;margin:0}.scenario-index{color:var(--blue);font-size:16px;font-weight:700;padding-top:2px}.verify-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:10px;box-shadow:var(--shadow)}.verify-row{display:grid;grid-template-columns:210px 1fr 115px;gap:25px;align-items:center;padding:20px;border-bottom:1px solid var(--line)}.verify-row:last-child{border-bottom:0}.verify-row strong{font-size:16px}.verify-row p{margin:0;color:var(--muted);font-size:14px}.verify-badge{justify-self:end;padding:6px 10px;border-radius:6px;background:#eaf8f7;color:#177c77;font-size:12px;font-weight:700}.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 8px 25px rgba(29,75,126,.05)}.flow-step{padding:28px 24px;position:relative;border-right:1px solid var(--line)}.flow-step:last-child{border-right:0}.flow-step:before{content:"";display:block;width:37px;height:37px;border-radius:50%;background:var(--blue);color:#fff;text-align:center;line-height:37px;font-weight:700;margin-bottom:17px}.flow-step:nth-child(1):before{content:"1"}.flow-step:nth-child(2):before{content:"2"}.flow-step:nth-child(3):before{content:"3"}.flow-step:nth-child(4):before{content:"4"}.flow-step h3{font-size:17px}.flow-step p{font-size:14px;color:var(--muted);margin:0}.selection{display:grid;grid-template-columns:.9fr 1.1fr;gap:32px;align-items:start}.selection-note{background:var(--blue-dark);color:#fff;border-radius:var(--radius);padding:34px}.selection-note h2{color:#fff;font-size:28px}.selection-note p{color:#c7d9eb;margin-bottom:24px}.selection-note ul{padding-left:18px;margin:0;color:#d8e5f3;font-size:14px}.selection-note li{margin:9px 0}.accordion-item{border:1px solid var(--line)!important;margin-bottom:12px;border-radius:10px!important;overflow:hidden}.accordion-button{font-weight:600;color:var(--ink);background:#fff;padding:19px 20px}.accordion-button:not(.collapsed){color:var(--blue-dark);background:var(--blue-soft);box-shadow:none}.accordion-button:focus{box-shadow:0 0 0 3px rgba(23,105,211,.12)}.accordion-body{color:var(--muted);padding:0 20px 20px;background:var(--blue-soft);font-size:14px}.cta{padding:76px 0;background:linear-gradient(105deg,#eaf4ff,#cfe4ff)}.cta-layout{display:flex;align-items:center;justify-content:space-between;gap:35px}.cta h2{font-size:31px;font-weight:700;margin-bottom:12px}.cta p{max-width:680px;color:var(--muted);margin:0}.btn-main,.btn-lightline{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border-radius:9px;font-weight:700;border:1px solid var(--blue)}.btn-main{background:var(--blue);color:#fff}.btn-main:hover{background:#0d55b0;color:#fff;transform:translateY(-2px)}.btn-lightline{background:#fff;color:var(--blue);margin-left:10px}.btn-lightline:hover{background:var(--blue-soft);color:var(--blue-dark)}.btn-main:focus,.btn-lightline:focus,.nav-cta:focus{outline:3px solid rgba(33,169,162,.35);outline-offset:3px}
footer{background:#102b4c;color:#c0d0e2;padding:55px 0 25px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.25fr;gap:35px}.footer-brand{font-size:21px;font-weight:700;color:#fff}.footer-grid p{font-size:14px;margin:0}.footer-title{color:#fff;font-size:15px;font-weight:700;margin-bottom:14px}.footer-links{display:flex;flex-direction:column;gap:8px;font-size:14px}.footer-links a:hover{color:#8ec5ff}.copyright{border-top:1px solid rgba(255,255,255,.15);margin-top:40px;padding-top:20px;display:flex;justify-content:space-between;gap:20px;font-size:13px;color:#9fb4ca}
@media(max-width:1024px){.product-grid{grid-template-columns:1fr 1fr}.eco-card:first-child{grid-column:span 2}.scene-grid{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.topline .container{justify-content:center;text-align:center}.top-contact{display:none}.navbar{min-height:68px}.navbar-collapse{padding:10px 0 18px}.nav-link{padding:11px 2px!important}.nav-cta{display:inline-flex;margin-top:10px}.page-intro{padding:52px 0}.page-intro .row{gap:25px}h1{font-size:32px}.section{padding:66px 0}.section-head h2,.cta h2{font-size:27px}.capability-map,.scenario-layout,.selection{grid-template-columns:1fr}.map-points{margin-top:4px}.point:nth-child(2),.point:nth-child(3){margin-top:0}.scenario-image img{height:310px}.verify-row{grid-template-columns:1fr;gap:7px}.verify-badge{justify-self:start}.flow{grid-template-columns:1fr 1fr}.flow-step:nth-child(2){border-right:0}.flow-step:nth-child(-n+2){border-bottom:1px solid var(--line)}.cta-layout{display:block}.cta-layout .btn-main{margin-top:22px}.footer-grid{gap:28px}}
@media(max-width:520px){.container{padding-left:19px;padding-right:19px}.brand{font-size:18px}.brand-mark{width:34px;height:34px}.product-grid,.map-points,.flow,.footer-grid{grid-template-columns:1fr}.eco-card:first-child{grid-column:auto}.eco-card:first-child img,.eco-card img{height:190px}.flow-step,.flow-step:nth-child(2){border-right:0;border-bottom:1px solid var(--line)}.flow-step:last-child{border-bottom:0}.section-head{margin-bottom:28px}.section-head h2{font-size:25px}.map-core{padding:28px}.intro-side{padding:20px}.cta{padding:60px 0}.btn-lightline{margin:11px 0 0}.copyright{display:block}.copyright span{display:block;margin:5px 0}.scenario-item{grid-template-columns:38px 1fr}}

/* roulang page: category4 */
:root{
      --blue:#1769d3;
      --blue-dark:#103b72;
      --blue-soft:#eaf3ff;
      --cyan:#21a9a2;
      --ink:#15263d;
      --muted:#607087;
      --line:#dce6f1;
      --warm:#f8fbfe;
      --white:#fff;
      --radius:18px;
      --shadow:0 16px 40px rgba(29,75,126,.10);
      --shadow-hover:0 22px 45px rgba(29,75,126,.16);
    }
    *,*:before,*:after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--warm);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;line-height:1.75;overflow-x:hidden}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{max-width:100%;height:auto;display:block}
    button,input,textarea{font:inherit}
    .container{max-width:1180px}
    .topline{background:#f0f6fc;color:#607087;font-size:13px}
    .topline .container{min-height:38px;display:flex;align-items:center;justify-content:space-between}
    .topline strong{color:var(--blue-dark);font-weight:700}
    .mainnav{background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .navbar{min-height:78px}
    .brand{display:flex;align-items:center;gap:11px;font-size:20px;font-weight:700;color:var(--blue-dark);white-space:nowrap}
    .brand-mark{width:38px;height:38px;border-radius:11px;background:var(--blue);position:relative;box-shadow:0 8px 18px rgba(23,105,211,.25)}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:3px}
    .brand-mark:before{width:20px;height:5px;left:9px;top:11px;box-shadow:0 9px 0 #a8ddda}
    .brand-mark:after{width:5px;height:20px;left:17px;top:9px}
    .nav-link{color:#53657b!important;font-size:14px;font-weight:600;padding:10px 12px!important;border-bottom:2px solid transparent}
    .nav-link:hover,.nav-link.active{color:var(--blue)!important;border-bottom-color:var(--blue)}
    .nav-cta{padding:10px 17px;border-radius:9px;background:var(--blue);color:#fff;font-size:14px;font-weight:600}
    .nav-cta:hover{background:#0f54ad;color:#fff;transform:translateY(-1px)}
    .navbar-toggler{border:1px solid var(--line);padding:8px 10px}
    .navbar-toggler:focus{box-shadow:0 0 0 3px rgba(23,105,211,.16)}
    .page-hero{padding:92px 0 86px;background:linear-gradient(110deg,rgba(248,251,254,.97) 35%,rgba(234,243,255,.78)),url("/assets/images/backpic/back-6.webp") center/cover;position:relative}
    .page-hero:after{content:"";position:absolute;right:8%;top:25%;width:210px;height:210px;border:1px solid rgba(23,105,211,.18);border-radius:50%;box-shadow:0 0 0 28px rgba(23,105,211,.04)}
    .page-hero .container{position:relative;z-index:1}
    .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.08em}
    .eyebrow:before,.section-kicker:before{content:"";width:22px;height:2px;background:var(--cyan)}
    h1{font-size:clamp(34px,5vw,58px);line-height:1.2;letter-spacing:-.04em;font-weight:700;color:var(--blue-dark);margin:18px 0}
    h2{font-size:clamp(27px,3.2vw,40px);line-height:1.3;color:var(--blue-dark);font-weight:700;margin:12px 0 16px}
    h3{font-size:19px;line-height:1.45;font-weight:700;color:var(--blue-dark)}
    .page-hero p{font-size:18px;color:var(--muted);max-width:760px;margin:0 0 28px}
    .breadcrumb{font-size:13px;color:var(--muted);margin-bottom:18px}
    .breadcrumb a{color:var(--blue)}
    .btn-main,.btn-lightline{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border-radius:9px;font-weight:700;border:1px solid var(--blue)}
    .btn-main{background:var(--blue);color:#fff}
    .btn-main:hover{background:#0d55b0;color:#fff;transform:translateY(-2px)}
    .btn-lightline{color:var(--blue);background:#fff;margin-left:10px}
    .btn-lightline:hover{background:var(--blue-soft);color:var(--blue-dark)}
    .btn-main:focus,.btn-lightline:focus,.nav-cta:focus{outline:3px solid rgba(33,169,162,.35);outline-offset:3px}
    .section{padding:92px 0}
    .section.alt{background:#fff}
    .section-head{max-width:710px;margin-bottom:40px}
    .section-head p{color:var(--muted);margin:0;font-size:16px}
    .overview{display:grid;grid-template-columns:1.15fr .85fr;gap:58px;align-items:center}
    .overview img{width:100%;aspect-ratio:1.18;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow)}
    .layer-list{border-top:1px solid var(--line)}
    .layer-item{display:grid;grid-template-columns:65px 1fr;gap:18px;padding:22px 0;border-bottom:1px solid var(--line)}
    .layer-item b{color:var(--cyan);font-size:14px}
    .layer-item p{color:var(--muted);font-size:14px;margin:5px 0 0}
    .item-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
    .feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:0 8px 25px rgba(29,75,126,.05);transition:.25s}
    .feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:#acd0f7}
    .number{display:inline-flex;width:32px;height:32px;align-items:center;justify-content:center;border-radius:8px;background:var(--blue-soft);color:var(--blue);font-size:13px;font-weight:700;margin-bottom:18px}
    .feature-card p,.scene-card p{color:var(--muted);font-size:14px;margin:0}
    .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:17px}
    .tag{display:inline-flex;padding:4px 10px;border-radius:20px;background:#f1f6fb;color:#54708f;font-size:12px}
    .scene-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:28px}
    .scene-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;min-height:145px;box-shadow:0 8px 25px rgba(29,75,126,.05)}
    .scene-card strong{display:block;color:var(--blue);font-size:14px;margin-bottom:8px}
    .spec-panel{background:#103b72;color:#dce9f8;border-radius:var(--radius);padding:38px}
    .spec-panel h2,.spec-panel h3{color:#fff}
    .spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(255,255,255,.18);margin-top:28px}
    .spec{padding:22px;background:#103b72}
    .spec strong{display:block;color:#fff;font-size:23px;margin-bottom:5px}
    .spec span{font-size:13px;color:#b9cce1}
    .timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative;margin-top:35px}
    .timeline:before{content:"";height:2px;background:#bcd5ef;position:absolute;top:17px;left:4%;right:4%}
    .step{position:relative;padding:0 12px;text-align:center}
    .step i{display:flex;width:35px;height:35px;border-radius:50%;background:var(--blue);border:7px solid #d9eaff;margin:0 auto 18px;position:relative;z-index:1}
    .step strong{display:block;font-size:15px;color:var(--blue-dark)}
    .step span{display:block;font-size:13px;color:var(--muted);margin-top:7px}
    .accordion-item{border:1px solid var(--line)!important;margin-bottom:12px;border-radius:10px!important;overflow:hidden}
    .accordion-button{font-weight:600;color:var(--ink);background:#fff;padding:20px 22px}
    .accordion-button:not(.collapsed){color:var(--blue-dark);background:var(--blue-soft);box-shadow:none}
    .accordion-button:focus{box-shadow:0 0 0 3px rgba(23,105,211,.12)}
    .accordion-body{color:var(--muted);padding:0 22px 20px;background:var(--blue-soft)}
    .cta{background:linear-gradient(105deg,#eaf4ff,#cfe4ff);padding:72px 0}
    .cta-layout{display:flex;justify-content:space-between;align-items:center;gap:30px}
    .cta p{color:var(--muted);max-width:650px}
    footer{background:#102b4c;color:#c0d0e2;padding:55px 0 25px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
    .footer-brand{color:#fff;font-size:22px;font-weight:700}
    .footer-title{color:#fff;font-size:15px;font-weight:700;margin-bottom:15px}
    footer p{font-size:14px}
    .footer-links{display:flex;flex-direction:column;gap:9px;font-size:13px}
    .footer-links a:hover{color:#fff;transform:translateX(3px)}
    .copyright{border-top:1px solid rgba(255,255,255,.15);margin-top:40px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;font-size:12px;color:#94abc3}
    @media(max-width:991px){
      .top-contact{display:none}
      .navbar-collapse{padding:18px 0}
      .nav-link{padding:10px 0!important}
      .nav-cta{display:inline-flex;margin-top:8px}
      .overview,.scene-layout{grid-template-columns:1fr;gap:35px}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:767px){
      .page-hero{padding:65px 0}
      .section{padding:66px 0}
      h1{font-size:36px}
      .item-grid,.spec-grid{grid-template-columns:1fr}
      .timeline{grid-template-columns:1fr;gap:22px;margin-top:25px}
      .timeline:before{width:2px;height:calc(100% - 35px);left:17px;top:18px;right:auto}
      .step{text-align:left;padding-left:65px}
      .step i{position:absolute;left:0;top:0;margin:0}
      .cta-layout{display:block}
      .cta-layout .btn-main{margin-top:12px}
      .footer-grid{grid-template-columns:1fr}
      .copyright{display:block;line-height:2}
      .copyright span{display:block}
    }
    @media(max-width:520px){
      .container{padding-left:20px;padding-right:20px}
      .brand{font-size:17px}
      .brand-mark{width:34px;height:34px}
      .brand-mark:before{left:7px}.brand-mark:after{left:15px}
      .btn-main,.btn-lightline{width:100%;margin:8px 0 0}
      .spec-panel{padding:25px 20px}
    }

/* 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}