/* roulang page: index */
:root{
      --blue:#155eef;--blue-dark:#103b8f;--ink:#14233b;--muted:#62728a;
      --bg:#f5f8fc;--line:#dfe8f3;--mint:#19a98a;--orange:#ee8d4b;
      --shadow:0 18px 55px rgba(30,69,120,.10);--radius:18px;
    }
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8}a{text-decoration:none;color:inherit}img{display:block;max-width:100%}button,input,select,textarea{font:inherit}button{cursor:pointer}.container{width:min(1200px,calc(100% - 40px));margin:auto}.topline{background:#fff;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}.header-main{background:#fff;position:sticky;top:0;z-index:30;box-shadow:0 3px 18px rgba(20,55,100,.05)}.brand{font-weight:800;font-size:20px;color:var(--blue-dark);letter-spacing:-.04em}.brand i{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--mint);margin:0 7px 2px 0}.nav-link{font-size:14px;color:#4e6079;padding:23px 9px;position:relative;white-space:nowrap}.nav-link:hover,.nav-link.active{color:var(--blue)}.nav-link.active:after{content:"";height:3px;background:var(--blue);position:absolute;left:9px;right:9px;bottom:0;border-radius:3px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:10px;font-weight:700;font-size:14px;border:1px solid transparent;transition:.25s}.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(21,94,239,.22)}.btn-primary:hover{background:#0d4bc7;transform:translateY(-2px)}.btn-light{background:#fff;color:var(--blue);border-color:#cddcf1}.btn-light:hover{border-color:var(--blue);background:#f3f7ff}.btn-dark{background:#10233f;color:#fff}.btn:focus-visible,.nav-link:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,faq button:focus-visible{outline:3px solid #9bc4ff;outline-offset:3px}.hero{min-height:650px;position:relative;overflow:hidden;color:#fff;background:#102c60}.slide{position:absolute;inset:0;opacity:0;transition:opacity .65s;background-size:cover;background-position:center}.slide:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,28,67,.88) 8%,rgba(13,50,105,.62) 51%,rgba(12,38,77,.2));}.slide.active{opacity:1}.hero-content{position:relative;z-index:2;padding:118px 0 100px;max-width:690px}.eyebrow,.tag{display:inline-flex;align-items:center;gap:7px;color:#0e8a76;background:#e9fbf6;border:1px solid #bdeee2;border-radius:99px;padding:5px 12px;font-size:12px;font-weight:800}.hero .eyebrow{background:rgba(255,255,255,.13);border-color:rgba(255,255,255,.27);color:#c9fff4}.hero h1{font-size:clamp(38px,5.4vw,66px);line-height:1.18;letter-spacing:-.055em;margin:23px 0 20px}.hero p{font-size:18px;line-height:1.9;color:#dbe8fa;max-width:650px}.hero-actions{display:flex;gap:12px;margin-top:32px}.hero .btn-light{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.35)}.trust-strip{display:flex;gap:25px;flex-wrap:wrap;margin-top:45px;color:#d3e2f7;font-size:13px}.dots{position:absolute;z-index:3;bottom:32px;left:50%;display:flex;gap:8px}.dot{width:30px;height:5px;border:0;border-radius:5px;background:rgba(255,255,255,.35)}.dot.active{background:#fff}.section{padding:102px 0}.section-head{max-width:740px;margin-bottom:44px}.section-kicker{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em}.section h2{font-size:clamp(28px,3.4vw,42px);line-height:1.3;letter-spacing:-.045em;margin:10px 0 16px}.section-head p{color:var(--muted);font-size:16px;margin:0}.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}.intro-image{border-radius:22px;overflow:hidden;box-shadow:var(--shadow);border:8px solid #fff}.spec-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:var(--shadow)}.spec-row{display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding:13px 0;font-size:14px}.spec-row:last-child{border:0}.spec-row span:first-child{color:var(--muted)}.matrix{display:grid;grid-template-columns:1.1fr .9fr 1.1fr;gap:16px}.matrix-card,.product,.adv-card,.story,.review,.news-item,.eco-item,.assurance{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s}.matrix-card:hover,.product:hover,.adv-card:hover,.news-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.matrix-card.tall{grid-row:span 2;background:#eaf2ff}.matrix-card h3,.product h3{font-size:20px;margin:15px 0 8px}.matrix-card p,.product p,.adv-card p,.story p,.review p,.news-item p,.eco-item p{color:var(--muted);font-size:14px;margin:0}.icon-box{width:42px;height:42px;border-radius:12px;background:#eaf2ff;color:var(--blue);display:grid;place-items:center;font-weight:800}.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.adv-card:first-child{grid-column:span 2;background:#eaf2ff}.adv-card:nth-child(2){grid-column:span 2}.adv-card:nth-child(n+3){min-height:180px}.number{font-size:13px;color:var(--blue);font-weight:800}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.product{padding:0;overflow:hidden}.product img{height:180px;width:100%;object-fit:cover}.product-body{padding:23px}.product .btn{margin-top:21px;min-height:40px;padding:0 16px}.stats{background:#12315f;color:#fff;padding:60px 0}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:25px}.stat{border-left:1px solid rgba(255,255,255,.25);padding-left:22px}.stat strong{font-size:39px;line-height:1;display:block;margin-bottom:10px}.stat span{font-size:13px;color:#bfd2ef}.timeline{display:grid;grid-template-columns:repeat(6,1fr);border-top:2px solid #bdd0ea;gap:0}.step{position:relative;padding:31px 13px 0}.step:before{content:"";position:absolute;top:-9px;left:13px;width:16px;height:16px;background:var(--blue);border:4px solid var(--bg);border-radius:50%}.step b{font-size:15px}.step small{display:block;color:var(--muted);font-size:13px;margin-top:8px}.dark-case{background:#101f38;color:#fff}.case-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}.case-main{min-height:360px;border-radius:20px;padding:35px;background:linear-gradient(135deg,rgba(19,74,147,.84),rgba(16,31,56,.75)),url('/assets/images/backpic/back-5.webp') center/cover}.case-main p{color:#c4d7f3;max-width:600px}.case-side{display:grid;gap:18px}.case-chip{border:1px solid rgba(180,213,255,.2);border-radius:16px;padding:22px;background:rgba(255,255,255,.05)}.case-chip span{font-size:12px;color:#90e1cd}.story-grid{display:grid;grid-template-columns:1fr 1fr;gap:25px}.quote-mark{font-size:48px;color:var(--blue);line-height:1}.review-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:18px}.review.featured{background:#eaf2ff}.stars{color:#e68a2e;letter-spacing:3px}.assurance-bar{display:flex;justify-content:space-between;gap:16px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:21px 26px;box-shadow:var(--shadow)}.assurance strong{display:block;font-size:15px}.assurance span{display:block;color:var(--muted);font-size:13px}.eco-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.eco-item{padding:21px}.eco-item strong{font-size:15px}.news-layout{display:grid;grid-template-columns:1.45fr .75fr;gap:28px}.news-list{display:grid;gap:12px}.news-item{display:grid;grid-template-columns:100px 1fr;gap:20px;padding:20px}.date{color:var(--blue);font-weight:800;font-size:13px}.hot-box{background:#eaf2ff;border-radius:18px;padding:27px}.hot-box li{padding:12px 0;border-bottom:1px solid #cbdcf2;font-size:14px}.faq-list{max-width:860px}.faq{background:#fff;border:1px solid var(--line);border-radius:13px;margin-bottom:10px;overflow:hidden}.faq button{display:flex;justify-content:space-between;width:100%;text-align:left;border:0;background:transparent;padding:20px 23px;font-weight:700;color:var(--ink)}.faq button span:last-child{color:var(--blue);font-size:22px}.faq-answer{display:none;padding:0 23px 20px;color:var(--muted);font-size:14px}.faq.open .faq-answer{display:block}.cta{background:#eaf2ff}.cta-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:45px;align-items:start}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.field{display:flex;flex-direction:column;gap:6px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:700}.field input,.field select,.field textarea{width:100%;border:1px solid #cfdced;background:#fff;border-radius:9px;padding:11px 13px;color:var(--ink)}.field textarea{min-height:105px;resize:vertical}.form-note{font-size:12px;color:var(--muted);margin-top:10px}.footer{background:#0f2039;color:#c4d4e9;padding:65px 0 22px}.footer-grid{display:grid;grid-template-columns:1.3fr .8fr .8fr 1fr;gap:35px}.footer .brand{color:#fff}.footer h3{font-size:14px;color:#fff;margin:0 0 15px}.footer a{display:block;font-size:13px;margin:8px 0;color:#b7c8dc}.footer a:hover{color:#fff}.footer p{font-size:13px;color:#aebfd4}.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:18px;font-size:12px;color:#91a6c1;display:flex;justify-content:space-between;gap:15px}.mobile-toggle{display:none;background:transparent;border:1px solid var(--line);width:44px;height:44px;border-radius:9px;color:var(--blue)}@media(max-width:900px){.nav-link{padding:20px 5px;font-size:12px}.intro-grid,.case-grid,.story-grid,.cta-grid,.news-layout{grid-template-columns:1fr}.matrix{grid-template-columns:1fr 1fr}.adv-grid{grid-template-columns:1fr 1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}.timeline{grid-template-columns:repeat(3,1fr);row-gap:25px}.review-grid{grid-template-columns:1fr 1fr}.eco-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}}@media(max-width:620px){.container{width:min(100% - 28px,1200px)}.topline .container{padding:8px 0}.topline .business-tags{display:none}.header-main .container{min-height:68px}.desktop-nav{display:none}.mobile-toggle{display:block}.mobile-nav{display:none;position:absolute;left:0;right:0;top:68px;background:#fff;border-top:1px solid var(--line);padding:10px 14px;box-shadow:0 12px 24px rgba(20,55,100,.1)}.mobile-nav.open{display:block}.mobile-nav .nav-link{display:block;padding:12px 8px}.hero{min-height:650px}.hero-content{padding:90px 0 85px}.hero p{font-size:16px}.hero-actions{flex-wrap:wrap}.section{padding:70px 0}.intro-grid,.product-grid,.matrix,.adv-grid,.review-grid,.stats-grid,.eco-grid{grid-template-columns:1fr}.adv-card:first-child,.adv-card:nth-child(2){grid-column:auto}.timeline{grid-template-columns:1fr 1fr}.step{padding-top:25px}.case-main{min-height:330px;padding:25px}.assurance-bar{display:grid;grid-template-columns:1fr 1fr;padding:20px}.news-item{grid-template-columns:1fr;gap:3px}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:8px}}

/* roulang page: category2 */
:root{
      --blue:#155eef;--blue-dark:#103b8f;--ink:#14233b;--muted:#62728a;
      --bg:#f5f8fc;--line:#dfe8f3;--mint:#19a98a;--orange:#ee8d4b;
      --shadow:0 18px 55px rgba(30,69,120,.10);--radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8}
    a{text-decoration:none;color:inherit}
    img{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(1200px,calc(100% - 40px));margin:auto}
    .topline{background:#f0f5fb;color:#64758c;font-size:12px;border-bottom:1px solid #e5edf6}
    .topline .container{min-height:38px}
    .business-tags{color:#49627f}
    .header-main{background:#fff;position:sticky;top:0;z-index:30;box-shadow:0 3px 18px rgba(20,55,100,.05)}
    .brand{font-weight:800;font-size:20px;color:var(--blue-dark);letter-spacing:-.04em}
    .brand i{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--mint);margin:0 7px 2px 0}
    .desktop-nav{display:flex;align-items:center}
    .nav-link{font-size:14px;color:#4e6079;padding:23px 9px;position:relative;white-space:nowrap;transition:.2s}
    .nav-link:hover,.nav-link.active{color:var(--blue)}
    .nav-link.active:after{content:"";height:3px;background:var(--blue);position:absolute;left:9px;right:9px;bottom:0;border-radius:3px}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:10px;font-weight:700;font-size:14px;border:1px solid transparent;transition:.25s}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(21,94,239,.22)}
    .btn-primary:hover{background:#0d4bc7;transform:translateY(-2px)}
    .btn-light{background:#fff;color:var(--blue);border-color:#cddcf1}
    .btn-light:hover{border-color:var(--blue);background:#f3f7ff}
    .btn-dark{background:#10233f;color:#fff}
    .btn-dark:hover{background:#1e3d68;transform:translateY(-2px)}
    .btn:focus-visible,.nav-link:focus-visible,.mobile-toggle:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,.faq button:focus-visible{outline:3px solid #9bc4ff;outline-offset:3px}
    .mobile-toggle{display:none;background:#fff;border:1px solid var(--line);width:44px;height:44px;border-radius:9px;color:var(--ink);font-size:21px}
    .mobile-nav{display:none}
    .page-banner{position:relative;overflow:hidden;background:#102c60;color:#fff;padding:78px 0 82px}
    .page-banner:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(16,44,96,.98) 20%,rgba(16,44,96,.68) 55%,rgba(16,44,96,.28)),url('/assets/images/backpic/back-3.webp') center/cover;z-index:0}
    .page-banner .container{position:relative;z-index:1}
    .crumbs{font-size:13px;color:#bed2ee;margin-bottom:25px}
    .crumbs a:hover{color:#fff}
    .eyebrow,.tag{display:inline-flex;align-items:center;gap:7px;color:#0e8a76;background:#e9fbf6;border:1px solid #bdeee2;border-radius:99px;padding:5px 12px;font-size:12px;font-weight:800}
    .page-banner .eyebrow{background:rgba(255,255,255,.13);border-color:rgba(255,255,255,.27);color:#c9fff4}
    .page-banner h1{font-size:clamp(36px,5vw,60px);line-height:1.22;letter-spacing:-.055em;margin:18px 0 18px;max-width:780px}
    .page-banner p{font-size:17px;line-height:1.9;color:#dbe8fa;max-width:760px;margin:0}
    .section{padding:96px 0}
    .section.alt{background:#fff}
    .section-head{max-width:760px;margin-bottom:42px}
    .section-kicker{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em}
    .section h2{font-size:clamp(28px,3.4vw,42px);line-height:1.3;letter-spacing:-.045em;margin:10px 0 15px}
    .section-head p{color:var(--muted);font-size:16px;margin:0}
    .topic-bar{display:flex;gap:10px;flex-wrap:wrap;margin-top:28px}
    .topic-bar .tag{background:#fff;color:#4d6380;border-color:#d7e3f1}
    .topic-bar .tag.active{background:#eaf2ff;color:var(--blue);border-color:#bcd2f7}
    .fusion-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:28px;align-items:stretch}
    .feature-image{min-height:360px;border-radius:20px;overflow:hidden;position:relative;background:#dceafa}
    .feature-image img{width:100%;height:100%;object-fit:cover}
    .image-caption{position:absolute;left:22px;right:22px;bottom:20px;padding:14px 17px;border-radius:12px;background:rgba(15,38,73,.84);color:#fff;font-size:13px}
    .data-flow{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
    .data-flow h3{font-size:22px;margin:0 0 22px}
    .flow-row{display:flex;align-items:center;gap:12px;padding:14px 0;border-bottom:1px solid var(--line)}
    .flow-row:last-child{border-bottom:0}
    .flow-index{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:#eaf2ff;color:var(--blue);font-weight:800;font-size:13px;flex:none}
    .flow-row strong{display:block;font-size:15px}
    .flow-row span{display:block;color:var(--muted);font-size:13px}
    .module-list{display:grid;gap:14px}
    .module-item{display:grid;grid-template-columns:78px 1fr auto;gap:22px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:15px;padding:22px 24px;transition:.25s}
    .module-item:hover{transform:translateX(5px);box-shadow:var(--shadow);border-color:#bcd1ef}
    .module-no{font-size:30px;font-weight:800;color:#c4d8f5}
    .module-item h3{font-size:19px;margin:0 0 4px}
    .module-item p{font-size:14px;color:var(--muted);margin:0}
    .module-meta{display:flex;gap:7px;flex-wrap:wrap;justify-content:flex-end}
    .module-meta span{font-size:12px;padding:4px 9px;border-radius:6px;background:#f1f6fc;color:#536b88;white-space:nowrap}
    .matrix-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:680px}
    th,td{text-align:left;padding:18px 21px;border-bottom:1px solid var(--line);font-size:14px}
    th{background:#edf4ff;color:var(--blue-dark);font-weight:800}
    tr:last-child td{border-bottom:0}
    td:first-child{font-weight:700;color:var(--ink)}
    .ok{color:var(--mint);font-weight:700}
    .process{display:grid;grid-template-columns:repeat(5,1fr);position:relative;gap:16px}
    .process:before{content:"";position:absolute;top:24px;left:8%;right:8%;height:1px;background:#c4d5e9}
    .process-step{position:relative;z-index:1}
    .process-number{width:49px;height:49px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--blue);color:#fff;font-weight:800;border:6px solid var(--bg);margin-bottom:18px}
    .process-step h3{font-size:16px;margin:0 0 6px}
    .process-step p{font-size:13px;color:var(--muted);margin:0}
    .metric-panel{background:#10233f;border-radius:20px;padding:32px;color:#fff}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .metric{border:1px solid rgba(190,215,248,.18);border-radius:13px;padding:21px;background:rgba(255,255,255,.045)}
    .metric strong{font-size:27px;display:block;color:#fff}
    .metric span{font-size:13px;color:#b8cce7}
    .faq-list{max-width:880px}
    .faq{background:#fff;border:1px solid var(--line);border-radius:13px;margin-bottom:10px;overflow:hidden}
    .faq button{display:flex;justify-content:space-between;align-items:center;width:100%;text-align:left;border:0;background:transparent;padding:19px 23px;font-weight:700;color:var(--ink);min-height:58px}
    .faq button span:last-child{color:var(--blue);font-size:22px;line-height:1}
    .faq-answer{display:none;padding:0 23px 20px;color:var(--muted);font-size:14px}
    .faq.open .faq-answer{display:block}
    .faq.open button span:last-child{transform:rotate(45deg)}
    .cta{background:#eaf2ff}
    .cta-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:45px;align-items:start}
    .cta h2{margin-top:0}
    .contact-points{display:grid;gap:12px;margin-top:28px}
    .contact-point{padding:15px 17px;background:#fff;border:1px solid #d9e5f3;border-radius:11px}
    .contact-point small{display:block;color:var(--muted);font-size:12px}
    .contact-point strong{font-size:15px}
    .form-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:27px;box-shadow:var(--shadow)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}
    .field input,.field select,.field textarea{width:100%;border:1px solid #cfdced;background:#fff;border-radius:9px;padding:11px 13px;color:var(--ink);min-height:45px}
    .field textarea{min-height:105px;resize:vertical}
    .field.full{grid-column:1/-1}
    .form-note{font-size:12px;color:var(--muted);margin-top:10px}
    .footer{background:#0f2039;color:#c4d4e9;padding:65px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.3fr .8fr .8fr 1fr;gap:35px}
    .footer .brand{color:#fff}
    .footer h3{font-size:14px;color:#fff;margin:0 0 15px}
    .footer a{display:block;font-size:13px;margin:8px 0;color:#b7c8dc}
    .footer a:hover{color:#fff}
    .footer p{font-size:13px;color:#aebfd4}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:18px;font-size:12px;color:#91a6c1;display:flex;justify-content:space-between;gap:15px}
    @media(max-width:1024px){
      .desktop-nav{display:none}
      .header-main .btn-primary{display:none}
      .mobile-toggle{display:block}
      .mobile-nav{display:none;padding:8px 20px 18px;border-top:1px solid var(--line);background:#fff}
      .mobile-nav.show{display:grid}
      .mobile-nav .nav-link{padding:12px 4px}
      .mobile-nav .nav-link.active:after{display:none}
      .fusion-grid,.cta-grid{grid-template-columns:1fr}
      .module-item{grid-template-columns:58px 1fr}
      .module-meta{grid-column:2;justify-content:flex-start}
      .process{grid-template-columns:repeat(3,1fr);gap:24px}
      .process:before{display:none}
      .metric-grid{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container{width:min(100% - 32px,1200px)}
      .topline .container{padding:7px 0;display:block}
      .business-tags{margin-bottom:2px}
      .page-banner{padding:58px 0 62px}
      .section{padding:70px 0}
      .section-head{margin-bottom:30px}
      .feature-image{min-height:260px}
      .process{grid-template-columns:1fr 1fr}
      .module-item{padding:18px}
      .copyright{display:block;line-height:2}
      .copyright span{display:block}
    }
    @media(max-width:520px){
      .brand{font-size:17px}
      .topline{font-size:11px}
      .topline .container>div:last-child{white-space:normal}
      .page-banner h1{font-size:36px}
      .page-banner p{font-size:15px}
      .section h2{font-size:28px}
      .module-item{grid-template-columns:1fr}
      .module-no{font-size:22px}
      .module-meta{grid-column:auto}
      .process{grid-template-columns:1fr}
      .metric-grid{grid-template-columns:1fr 1fr;gap:10px}
      .metric{padding:16px 12px}
      .metric strong{font-size:22px}
      .form-grid{grid-template-columns:1fr}
      .field.full{grid-column:auto}
      .footer-grid{grid-template-columns:1fr;gap:22px}
    }

/* roulang page: category1 */
:root{
 --blue:#155eef;--blue-dark:#103b8f;--ink:#14233b;--muted:#62728a;
 --bg:#f5f8fc;--line:#dfe8f3;--mint:#19a98a;--orange:#ee8d4b;
 --shadow:0 18px 55px rgba(30,69,120,.10);--radius:18px
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.container{width:min(1200px,calc(100% - 40px));margin:auto}
.topline{background:#f0f5fb;color:#64758c;font-size:12px}
.header-main{background:#fff;position:sticky;top:0;z-index:30;box-shadow:0 3px 18px rgba(20,55,100,.05)}
.brand{font-weight:800;font-size:20px;color:var(--blue-dark);letter-spacing:-.04em;white-space:nowrap}
.brand i{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--mint);margin:0 7px 2px 0}
.desktop-nav{display:flex;align-items:center}
.nav-link{font-size:14px;color:#4e6079;padding:23px 9px;position:relative;white-space:nowrap;transition:.2s}
.nav-link:hover,.nav-link.active{color:var(--blue)}
.nav-link.active:after{content:"";height:3px;background:var(--blue);position:absolute;left:9px;right:9px;bottom:0;border-radius:3px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:10px;font-weight:700;font-size:14px;border:1px solid transparent;transition:.25s}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(21,94,239,.22)}
.btn-primary:hover{background:#0d4bc7;transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--blue);border-color:#cddcf1}
.btn-light:hover{border-color:var(--blue);background:#f3f7ff}
.btn-dark{background:#10233f;color:#fff}
.btn:focus-visible,.nav-link:focus-visible,.mobile-toggle:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,.faq button:focus-visible{outline:3px solid #9bc4ff;outline-offset:3px}
.mobile-toggle{display:none;background:transparent;border:1px solid var(--line);width:44px;height:44px;border-radius:9px;color:var(--blue-dark)}
.mobile-nav{display:none}
.page-intro{padding:72px 0 58px;background:#fff;border-bottom:1px solid var(--line)}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:22px}
.breadcrumb a{color:var(--blue)}
.page-intro h1{font-size:clamp(34px,5vw,58px);line-height:1.2;letter-spacing:-.055em;margin:0 0 18px}
.page-intro p{max-width:790px;color:var(--muted);font-size:17px;margin:0}
.topic-bar{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.tag{display:inline-flex;align-items:center;color:#0e8a76;background:#e9fbf6;border:1px solid #bdeee2;border-radius:99px;padding:5px 12px;font-size:12px;font-weight:800}
.section{padding:92px 0}
.section-head{max-width:760px;margin-bottom:38px}
.section-kicker{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em}
.section h2{font-size:clamp(28px,3.4vw,42px);line-height:1.3;letter-spacing:-.045em;margin:10px 0 14px}
.section-head p{color:var(--muted);font-size:16px;margin:0}
.architecture{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:stretch}
.arch-diagram{background:#eaf2ff;border:1px solid #d2e1f6;border-radius:20px;padding:28px}
.layer{display:grid;grid-template-columns:120px 1fr;gap:18px;align-items:center;padding:22px 0;border-bottom:1px solid #cbdcf0}
.layer:last-child{border-bottom:0}
.layer strong{color:var(--blue-dark)}
.layer-content{display:flex;flex-wrap:wrap;gap:9px}
.layer-content span{background:#fff;border:1px solid #d5e2f2;border-radius:8px;padding:7px 11px;font-size:13px;color:#405675}
.arch-note{background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px;box-shadow:var(--shadow)}
.arch-note img{height:210px;width:100%;object-fit:cover;border-radius:13px;margin-bottom:23px}
.spec-list{margin-top:20px}
.spec-row{display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding:12px 0;font-size:14px}
.spec-row:last-child{border:0}
.spec-row span:first-child{color:var(--muted)}
.module-list{display:grid;gap:14px}
.module-item{display:grid;grid-template-columns:70px 1fr auto;gap:22px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px 25px;transition:.25s}
.module-item:hover{transform:translateX(4px);box-shadow:var(--shadow);border-color:#bdd2f2}
.module-num{font-size:24px;color:var(--blue);font-weight:800}
.module-item h3{font-size:19px;margin:0 0 4px}
.module-item p{font-size:14px;color:var(--muted);margin:0}
.module-meta{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:7px}
.meta{font-size:12px;border:1px solid #d8e4f2;background:#f7faff;color:#566b86;border-radius:7px;padding:4px 8px;white-space:nowrap}
.compare-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow)}
.compare{width:100%;min-width:700px;border-collapse:collapse;text-align:left}
.compare th,.compare td{padding:17px 20px;border-bottom:1px solid var(--line);font-size:14px}
.compare th{background:#edf4ff;color:var(--blue-dark);font-weight:800}
.compare tr:last-child td{border-bottom:0}
.compare td:first-child{font-weight:700;color:var(--ink)}
.check{color:var(--mint);font-weight:800}
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
.process:before{content:"";position:absolute;top:27px;left:8%;right:8%;height:1px;background:#c9d9ed}
.process-step{position:relative;padding:0 18px 10px}
.process-step:first-child{padding-left:0}
.process-step:last-child{padding-right:0}
.step-index{position:relative;z-index:1;width:54px;height:54px;border-radius:50%;display:grid;place-items:center;background:#fff;border:7px solid #dce9fb;color:var(--blue);font-weight:800;margin-bottom:20px}
.process-step h3{font-size:17px;margin:0 0 7px}
.process-step p{font-size:13px;color:var(--muted);margin:0}
.process-step em{display:block;color:#0e8a76;font-size:12px;font-style:normal;margin-top:10px}
.tech-note{background:#10233f;color:#fff;border-radius:22px;padding:38px;display:grid;grid-template-columns:1fr 1fr;gap:35px}
.tech-note h2{font-size:31px;line-height:1.35;margin:0 0 15px}
.tech-note p{color:#c4d7f3;font-size:15px;margin:0}
.note-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.note-item{border:1px solid rgba(190,218,250,.18);border-radius:12px;padding:16px;background:rgba(255,255,255,.05)}
.note-item strong{display:block;color:#9ce9d7;font-size:14px}
.note-item span{display:block;color:#c4d7f3;font-size:13px;margin-top:4px}
.faq-list{max-width:860px}
.faq{background:#fff;border:1px solid var(--line);border-radius:13px;margin-bottom:10px;overflow:hidden}
.faq button{display:flex;justify-content:space-between;width:100%;text-align:left;border:0;background:transparent;padding:19px 23px;font-weight:700;color:var(--ink)}
.faq button span:last-child{color:var(--blue);font-size:22px}
.faq-answer{display:none;padding:0 23px 20px;color:var(--muted);font-size:14px}
.faq.open .faq-answer{display:block}
.cta{background:#eaf2ff}
.cta-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:45px;align-items:start}
.cta h2{font-size:36px;line-height:1.35;margin:0 0 16px}
.cta p{color:var(--muted);font-size:15px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;border:1px solid #cfdced;background:#fff;border-radius:9px;padding:11px 13px;color:var(--ink)}
.field textarea{min-height:105px;resize:vertical}
.field.full{grid-column:1/-1}
.form-note{font-size:12px;color:var(--muted);margin-top:10px}
.footer{background:#0f2039;color:#c4d4e9;padding:65px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.3fr .8fr .8fr 1fr;gap:35px}
.footer .brand{color:#fff}
.footer h3{font-size:14px;color:#fff;margin:0 0 15px}
.footer a{display:block;font-size:13px;margin:8px 0;color:#b7c8dc}
.footer a:hover{color:#fff}
.footer p{font-size:13px;color:#aebfd4}
.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:18px;font-size:12px;color:#91a6c1;display:flex;justify-content:space-between;gap:15px}
@media(max-width:1024px){.desktop-nav{display:none}.header-main .container{min-height:68px}.mobile-toggle{display:block}.header-main>.mobile-nav{display:none}.mobile-nav.open{display:grid;padding:10px 20px 18px;background:#fff;border-top:1px solid var(--line)}.mobile-nav .nav-link{padding:13px 0}.mobile-nav .nav-link.active:after{left:0;right:auto;width:34px;bottom:5px}.architecture,.cta-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.process{grid-template-columns:repeat(2,1fr);gap:30px}.process:before{display:none}}
@media(max-width:768px){.container{width:min(100% - 30px,600px)}.topline .container{padding:7px 0}.topline .business-tags{display:none}.topline .container>div:last-child{font-size:11px}.section{padding:68px 0}.page-intro{padding:48px 0 42px}.module-item{grid-template-columns:45px 1fr}.module-meta{grid-column:2;justify-content:flex-start}.note-list{grid-template-columns:1fr}.cta h2{font-size:30px}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:6px}}
@media(max-width:520px){.brand{font-size:17px}.header-main .btn{display:none}.hero-actions{flex-direction:column;align-items:stretch}.process{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.footer-grid{grid-template-columns:1fr}.architecture{gap:14px}.arch-diagram,.arch-note,.tech-note{padding:22px}.layer{grid-template-columns:1fr;gap:8px}.page-intro h1{font-size:35px}.module-item{padding:18px}.module-item h3{font-size:17px}}

/* roulang page: category3 */
:root{
      --blue:#155eef;--blue-dark:#103b8f;--ink:#14233b;--muted:#62728a;
      --bg:#f5f8fc;--line:#dfe8f3;--mint:#19a98a;--orange:#ee8d4b;
      --shadow:0 18px 55px rgba(30,69,120,.10);--radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8}
    a{text-decoration:none;color:inherit}
    img{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(1200px,calc(100% - 40px));margin:auto}
    .topline{background:#10233f;color:#b9cbe2;font-size:12px}
    .business-tags{color:#d6e4f6;letter-spacing:.04em}
    .header-main{background:#fff;position:sticky;top:0;z-index:30;box-shadow:0 3px 18px rgba(20,55,100,.05)}
    .brand{font-weight:800;font-size:20px;color:var(--blue-dark);letter-spacing:-.04em;white-space:nowrap}
    .brand i{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--mint);margin:0 7px 2px 0}
    .desktop-nav{display:flex;align-items:center}
    .nav-link{font-size:14px;color:#4e6079;padding:23px 9px;position:relative;white-space:nowrap}
    .nav-link:hover,.nav-link.active{color:var(--blue)}
    .nav-link.active:after{content:"";height:3px;background:var(--blue);position:absolute;left:9px;right:9px;bottom:0;border-radius:3px}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:10px;font-weight:700;font-size:14px;border:1px solid transparent;transition:.25s}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(21,94,239,.22)}
    .btn-primary:hover{background:#0d4bc7;transform:translateY(-2px)}
    .btn-light{background:#fff;color:var(--blue);border-color:#cddcf1}
    .btn-light:hover{border-color:var(--blue);background:#f3f7ff}
    .btn-dark{background:#10233f;color:#fff}
    .btn-dark:hover{background:#1d3960;transform:translateY(-2px)}
    .btn:focus-visible,.nav-link:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,.faq button:focus-visible{outline:3px solid #9bc4ff;outline-offset:3px}
    .mobile-toggle{display:none;background:transparent;border:1px solid var(--line);width:44px;height:44px;border-radius:9px;color:var(--blue-dark)}
    .mobile-nav{display:none}
    .page-banner{position:relative;overflow:hidden;background:#eaf2ff;padding:88px 0 78px}
    .page-banner:after{content:"";position:absolute;right:-100px;top:-180px;width:520px;height:520px;border-radius:50%;background:rgba(21,94,239,.08)}
    .banner-content{position:relative;z-index:1;max-width:780px}
    .eyebrow,.tag{display:inline-flex;align-items:center;gap:7px;color:#0e8a76;background:#e9fbf6;border:1px solid #bdeee2;border-radius:99px;padding:5px 12px;font-size:12px;font-weight:800}
    .breadcrumb{font-size:13px;color:var(--muted);margin-bottom:20px}
    .breadcrumb a{color:var(--blue)}
    .page-banner h1{font-size:clamp(36px,5vw,58px);line-height:1.2;letter-spacing:-.055em;margin:15px 0 18px}
    .page-banner p{max-width:720px;color:#536781;font-size:17px;margin:0}
    .section{padding:92px 0}
    .section-head{max-width:760px;margin-bottom:40px}
    .section-kicker{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em}
    .section h2{font-size:clamp(28px,3.4vw,42px);line-height:1.3;letter-spacing:-.045em;margin:10px 0 15px}
    .section-head p{color:var(--muted);font-size:16px;margin:0}
    .topic-bar{display:flex;gap:10px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:25px}
    .topic-bar .tag{background:#fff;color:#49627f;border-color:var(--line);padding:10px 17px}
    .topic-bar .tag.current{color:var(--blue);border-color:#a9c5f4;background:#edf4ff}
    .architecture{display:grid;grid-template-columns:1fr 1.45fr;gap:25px;align-items:stretch}
    .architecture-copy{background:#10233f;color:#fff;border-radius:20px;padding:35px;min-height:330px;background-image:linear-gradient(135deg,rgba(16,52,104,.92),rgba(16,35,63,.92)),url('/assets/images/backpic/back-3.webp');background-size:cover;background-position:center}
    .architecture-copy p{color:#c7d8ee;font-size:15px}
    .signal-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .signal{background:#fff;border:1px solid var(--line);border-radius:16px;padding:23px;transition:.25s}
    .signal:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .signal strong{display:block;font-size:19px;margin-bottom:6px}
    .signal span{font-size:13px;color:var(--muted)}
    .module-list{display:grid;gap:15px}
    .module-item{display:grid;grid-template-columns:70px 1fr auto;gap:22px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:17px;padding:23px 25px;transition:.25s}
    .module-item:hover{box-shadow:var(--shadow);border-color:#b8cef0;transform:translateX(4px)}
    .module-number{width:48px;height:48px;border-radius:13px;background:#eaf2ff;color:var(--blue);display:grid;place-items:center;font-weight:800}
    .module-item h3{font-size:19px;margin:0 0 5px}
    .module-item p{font-size:14px;color:var(--muted);margin:0}
    .module-meta{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
    .module-meta span{font-size:12px;color:#52708f;background:#f3f7fb;padding:5px 9px;border-radius:7px}
    .compare-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 8px 30px rgba(30,69,120,.05)}
    .compare{width:100%;min-width:680px;border-collapse:collapse;font-size:14px}
    .compare th,.compare td{text-align:left;padding:18px 22px;border-bottom:1px solid var(--line)}
    .compare th{background:#edf4ff;color:var(--blue-dark);font-size:13px}
    .compare tr:last-child td{border-bottom:0}
    .compare td:first-child{font-weight:700;color:var(--ink)}
    .flow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}
    .flow:before{content:"";position:absolute;left:8%;right:8%;top:26px;border-top:2px dashed #bad0ef}
    .flow-step{position:relative;z-index:1;padding-right:20px}
    .flow-dot{width:54px;height:54px;background:#fff;border:2px solid var(--blue);color:var(--blue);border-radius:50%;display:grid;place-items:center;font-weight:800;margin-bottom:20px;box-shadow:0 0 0 8px var(--bg)}
    .flow-step h3{font-size:16px;margin:0 0 7px}
    .flow-step p{font-size:13px;color:var(--muted);margin:0}
    .performance{background:#10233f;color:#fff}
    .performance .section-kicker{color:#73d9c3}
    .performance .section-head p{color:#b9cbe2}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
    .metric{border:1px solid rgba(186,214,247,.2);border-radius:16px;padding:25px;background:rgba(255,255,255,.05)}
    .metric strong{display:block;font-size:32px;color:#fff;line-height:1.2;margin-bottom:8px}
    .metric em{font-style:normal;color:#7fe0c8;font-size:13px}
    .metric p{font-size:13px;color:#b9cbe2;margin:12px 0 0}
    .faq-list{max-width:850px}
    .faq{background:#fff;border:1px solid var(--line);border-radius:13px;margin-bottom:10px;overflow:hidden}
    .faq button{display:flex;justify-content:space-between;align-items:center;width:100%;text-align:left;border:0;background:transparent;padding:19px 22px;font-weight:700;color:var(--ink);min-height:58px}
    .faq button span:last-child{color:var(--blue);font-size:22px;line-height:1}
    .faq-answer{display:none;padding:0 22px 20px;color:var(--muted);font-size:14px}
    .faq.open .faq-answer{display:block}
    .faq.open button span:last-child{transform:rotate(45deg)}
    .cta{background:#eaf2ff;padding:75px 0}
    .cta-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
    .cta h2{font-size:clamp(28px,3.6vw,43px);line-height:1.3;margin:10px 0 15px}
    .cta p{color:var(--muted);font-size:16px}
    .contact-box{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:var(--shadow)}
    .contact-box strong{display:block;color:var(--blue-dark);font-size:18px;margin-bottom:10px}
    .contact-box p{font-size:14px;margin:6px 0}
    .footer{background:#0f2039;color:#c4d4e9;padding:65px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.3fr .8fr .8fr 1fr;gap:35px}
    .footer .brand{color:#fff}
    .footer h3{font-size:14px;color:#fff;margin:0 0 15px}
    .footer a{display:block;font-size:13px;margin:8px 0;color:#b7c8dc}
    .footer a:hover{color:#fff}
    .footer p{font-size:13px;color:#aebfd4}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:18px;font-size:12px;color:#91a6c1;display:flex;justify-content:space-between;gap:15px}
    @media(max-width:1024px){
      .desktop-nav{display:none}
      .mobile-toggle{display:block}
      .mobile-nav{display:none;background:#fff;border-top:1px solid var(--line);padding:8px 20px 16px}
      .mobile-nav.open{display:grid}
      .mobile-nav .nav-link{padding:12px 4px}
      .mobile-nav .nav-link.active:after{left:0;right:auto;width:35px;bottom:4px}
      .architecture,.cta-grid{grid-template-columns:1fr}
      .flow{grid-template-columns:repeat(3,1fr);gap:28px}
      .flow:before{display:none}
      .metric-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container{width:min(100% - 30px,1200px)}
      .topline .container{min-height:34px}
      .business-tags{display:none}
      .topline .container{justify-content:center}
      .topline{font-size:11px}
      .header-main .container{min-height:68px}
      .section{padding:68px 0}
      .page-banner{padding:65px 0 58px}
      .signal-list,.footer-grid{grid-template-columns:1fr 1fr}
      .module-item{grid-template-columns:55px 1fr;gap:15px}
      .module-meta{grid-column:2;justify-content:flex-start}
      .flow{grid-template-columns:1fr 1fr}
      .footer-grid{gap:24px}
      .copyright{display:block;line-height:2}
    }
    @media(max-width:520px){
      .brand{font-size:17px}
      .page-banner h1{font-size:35px}
      .page-banner p{font-size:15px}
      .signal-list,.metric-grid,.footer-grid{grid-template-columns:1fr}
      .module-item{padding:18px}
      .module-item h3{font-size:17px}
      .flow{grid-template-columns:1fr}
      .flow-step{padding-right:0;display:grid;grid-template-columns:54px 1fr;column-gap:16px}
      .flow-dot{grid-row:span 2;margin:0}
      .flow-step h3{align-self:end}
      .flow-step p{align-self:start}
      .cta{padding:58px 0}
    }

/* roulang page: category4 */
:root{
      --blue:#155eef;--blue-dark:#103b8f;--ink:#14233b;--muted:#62728a;
      --bg:#f5f8fc;--line:#dfe8f3;--mint:#19a98a;--orange:#ee8d4b;
      --shadow:0 18px 55px rgba(30,69,120,.10);--radius:18px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8}
    a{text-decoration:none;color:inherit}
    img{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(1200px,calc(100% - 40px));margin:auto}
    .topline{background:#10233f;color:#c7d8ec;font-size:12px}
    .header-main{background:#fff;position:sticky;top:0;z-index:30;box-shadow:0 3px 18px rgba(20,55,100,.05)}
    .brand{font-weight:800;font-size:20px;color:var(--blue-dark);letter-spacing:-.04em;white-space:nowrap}
    .brand i{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--mint);margin:0 7px 2px 0}
    .desktop-nav{display:flex;align-items:center}
    .nav-link{font-size:14px;color:#4e6079;padding:23px 9px;position:relative;white-space:nowrap;transition:.2s}
    .nav-link:hover,.nav-link.active{color:var(--blue)}
    .nav-link.active:after{content:"";height:3px;background:var(--blue);position:absolute;left:9px;right:9px;bottom:0;border-radius:3px}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:10px;font-weight:700;font-size:14px;border:1px solid transparent;transition:.25s}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(21,94,239,.22)}
    .btn-primary:hover{background:#0d4bc7;transform:translateY(-2px)}
    .btn-light{background:#fff;color:var(--blue);border-color:#cddcf1}
    .btn-light:hover{border-color:var(--blue);background:#f3f7ff}
    .btn:focus-visible,.nav-link:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #9bc4ff;outline-offset:3px}
    .mobile-toggle{display:none;background:#fff;border:1px solid var(--line);width:44px;height:44px;border-radius:9px;color:var(--blue-dark)}
    .mobile-nav{display:none}
    .page-banner{position:relative;overflow:hidden;background:#102c60;color:#fff;padding:82px 0 76px}
    .page-banner:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(9,34,75,.94),rgba(16,54,112,.66)),url('/assets/images/backpic/back-4.webp') center/cover}
    .banner-inner{position:relative;z-index:1;max-width:800px}
    .eyebrow,.tag{display:inline-flex;align-items:center;gap:7px;color:#0e8a76;background:#e9fbf6;border:1px solid #bdeee2;border-radius:99px;padding:5px 12px;font-size:12px;font-weight:800}
    .page-banner .eyebrow{background:rgba(255,255,255,.13);border-color:rgba(255,255,255,.27);color:#c9fff4}
    .page-banner h1{font-size:clamp(36px,5vw,60px);line-height:1.2;letter-spacing:-.055em;margin:20px 0 15px}
    .page-banner p{font-size:17px;color:#dbe8fa;max-width:720px;margin:0}
    .crumb{margin-top:22px;font-size:13px;color:#b5cbe7}
    .section{padding:88px 0}
    .section-head{max-width:760px;margin-bottom:38px}
    .section-kicker{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em}
    .section h2{font-size:clamp(28px,3.4vw,42px);line-height:1.3;letter-spacing:-.045em;margin:10px 0 14px}
    .section-head p{color:var(--muted);font-size:16px;margin:0}
    .topic-bar{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
    .topic-bar span{background:#fff;border:1px solid var(--line);border-radius:99px;padding:8px 15px;color:#49617f;font-size:13px}
    .topic-bar span.active{background:#eaf2ff;border-color:#b8d0fa;color:var(--blue);font-weight:700}
    .test-list{display:grid;gap:14px}
    .test-item{display:grid;grid-template-columns:70px 1.15fr 1fr 150px;gap:24px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px 25px;transition:.25s}
    .test-item:hover{transform:translateX(5px);box-shadow:var(--shadow);border-color:#bfd3f2}
    .test-num{font-size:28px;color:#b4c9e8;font-weight:800}
    .test-item h3{font-size:19px;margin:0 0 5px}
    .test-item p{font-size:14px;color:var(--muted);margin:0}
    .spec-label{font-size:12px;color:var(--blue);font-weight:800;margin-bottom:4px}
    .table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 10px 35px rgba(30,69,120,.06)}
    table{width:100%;border-collapse:collapse;min-width:700px}
    th,td{text-align:left;padding:18px 20px;border-bottom:1px solid var(--line);font-size:14px}
    th{background:#edf4ff;color:var(--blue-dark);font-weight:800}
    td{color:var(--muted)}
    tr:last-child td{border-bottom:0}
    .flow{display:grid;grid-template-columns:repeat(6,1fr);gap:0;position:relative}
    .flow:before{content:"";position:absolute;top:26px;left:7%;right:7%;height:2px;background:#c9dbf5}
    .flow-step{position:relative;z-index:1;padding:0 10px;text-align:center}
    .flow-step b{display:flex;align-items:center;justify-content:center;width:52px;height:52px;margin:0 auto 16px;background:#fff;border:2px solid #bcd3f5;border-radius:50%;color:var(--blue);font-size:17px}
    .flow-step h3{font-size:15px;margin:0 0 7px}
    .flow-step p{font-size:12px;color:var(--muted);margin:0}
    .dark-section{background:#10233f;color:#fff}
    .dark-section .section-head p{color:#b8cae1}
    .matrix{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:14px}
    .matrix-card{border:1px solid rgba(190,216,250,.18);border-radius:16px;padding:25px;background:rgba(255,255,255,.06)}
    .matrix-card h3{margin:0 0 9px;font-size:18px}
    .matrix-card p{color:#b8cae1;font-size:14px;margin:0}
    .matrix-card strong{display:block;color:#8fe1cd;font-size:27px;margin-bottom:8px}
    .support-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:stretch}
    .support-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px}
    .support-card img{width:100%;height:230px;object-fit:cover;border-radius:13px;margin-bottom:20px}
    .check-list{display:grid;gap:14px;margin:0;padding:0;list-style:none}
    .check-list li{padding:14px 16px 14px 43px;border-bottom:1px solid var(--line);position:relative;color:var(--muted);font-size:14px}
    .check-list li:before{content:"✓";position:absolute;left:10px;top:13px;color:var(--mint);font-weight:800;font-size:18px}
    .faq-list{max-width:850px}
    .faq{background:#fff;border:1px solid var(--line);border-radius:13px;margin-bottom:10px;overflow:hidden}
    .faq button{display:flex;justify-content:space-between;width:100%;text-align:left;border:0;background:transparent;padding:19px 22px;font-weight:700;color:var(--ink)}
    .faq button span:last-child{color:var(--blue);font-size:22px}
    .faq-answer{display:none;padding:0 22px 20px;color:var(--muted);font-size:14px}
    .faq.open .faq-answer{display:block}
    .cta{background:#eaf2ff}
    .cta-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:45px;align-items:start}
    .cta h2{margin-top:0}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}
    .field input,.field select,.field textarea{width:100%;border:1px solid #cfdced;background:#fff;border-radius:9px;padding:11px 13px;color:var(--ink)}
    .field textarea{min-height:105px;resize:vertical}
    .field.full{grid-column:1/-1}
    .form-note{font-size:12px;color:var(--muted);margin-top:10px}
    .footer{background:#0f2039;color:#c4d4e9;padding:65px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.3fr .8fr .8fr 1fr;gap:35px}
    .footer .brand{color:#fff}
    .footer h3{font-size:14px;color:#fff;margin:0 0 15px}
    .footer a{display:block;font-size:13px;margin:8px 0;color:#b7c8dc}
    .footer a:hover{color:#fff}
    .footer p{font-size:13px;color:#aebfd4}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:18px;font-size:12px;color:#91a6c1;display:flex;justify-content:space-between;gap:15px}
    @media(max-width:1024px){.desktop-nav{display:none}.header-main .btn{display:none}.mobile-toggle{display:block}.mobile-nav{padding:8px 20px 18px;border-top:1px solid var(--line)}.mobile-nav.open{display:grid}.mobile-nav .nav-link{padding:12px 8px}.test-item{grid-template-columns:55px 1fr 1fr}.test-item .btn{grid-column:2/-1;justify-self:start}.flow{grid-template-columns:repeat(3,1fr);gap:32px 0}.flow:before{display:none}.footer-grid{grid-template-columns:1fr 1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}}
    @media(max-width:768px){.container{width:min(100% - 30px,600px)}.topline .container{min-height:34px}.business-tags{display:none}.topline .container>div:last-child{font-size:11px}.page-banner{padding:62px 0 58px}.section{padding:68px 0}.test-item{grid-template-columns:42px 1fr;padding:19px}.test-item>div:nth-child(3){grid-column:2}.test-item .btn{grid-column:2}.support-grid,.cta-grid{grid-template-columns:1fr}.matrix{grid-template-columns:1fr 1fr}.flow-step{padding:0 5px}.copyright{display:block}.copyright span{display:block;margin-bottom:6px}}
    @media(max-width:520px){.brand{font-size:17px}.matrix{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.page-banner h1{font-size:35px}.page-banner p{font-size:15px}.section h2{font-size:28px}.flow{grid-template-columns:1fr 1fr;gap:25px 4px}.flow-step h3{font-size:14px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}.footer-grid>div:last-child{grid-column:1/-1}}

/* roulang page: category5 */
:root{
      --blue:#155eef;--blue-dark:#103b8f;--ink:#14233b;--muted:#62728a;
      --bg:#f5f8fc;--line:#dfe8f3;--mint:#19a98a;--orange:#ee8d4b;
      --shadow:0 18px 55px rgba(30,69,120,.10);--radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8}
    a{text-decoration:none;color:inherit}
    img{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(1200px,calc(100% - 40px));margin:auto}
    .topline{background:#10233f;color:#b9cbe0;font-size:12px}
    .business-tags{color:#d5e4f5}
    .header-main{background:#fff;position:sticky;top:0;z-index:30;box-shadow:0 3px 18px rgba(20,55,100,.06)}
    .brand{font-weight:800;font-size:20px;color:var(--blue-dark);letter-spacing:-.04em;white-space:nowrap}
    .brand i{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--mint);margin:0 7px 2px 0}
    .desktop-nav{display:flex;align-items:center}
    .nav-link{font-size:14px;color:#4e6079;padding:23px 9px;position:relative;white-space:nowrap}
    .nav-link:hover,.nav-link.active{color:var(--blue)}
    .nav-link.active:after{content:"";height:3px;background:var(--blue);position:absolute;left:9px;right:9px;bottom:0;border-radius:3px}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:10px;font-weight:700;font-size:14px;border:1px solid transparent;transition:.25s}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(21,94,239,.22)}
    .btn-primary:hover{background:#0d4bc7;transform:translateY(-2px)}
    .btn-light{background:#fff;color:var(--blue);border-color:#cddcf1}
    .btn-light:hover{border-color:var(--blue);background:#f3f7ff}
    .btn-dark{background:#10233f;color:#fff}
    .btn:focus-visible,.nav-link:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,.faq button:focus-visible{outline:3px solid #9bc4ff;outline-offset:3px}
    .mobile-toggle{display:none;background:#fff;border:1px solid var(--line);width:44px;height:44px;border-radius:9px;color:var(--blue-dark);font-size:22px}
    .mobile-nav{display:none}
    .page-intro{padding:82px 0 64px;background:#fff;border-bottom:1px solid var(--line)}
    .breadcrumb{font-size:13px;color:var(--muted);margin-bottom:24px}
    .breadcrumb a{color:var(--blue)}
    .eyebrow,.tag{display:inline-flex;align-items:center;gap:7px;color:#0e8a76;background:#e9fbf6;border:1px solid #bdeee2;border-radius:99px;padding:5px 12px;font-size:12px;font-weight:800}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(36px,5vw,60px);line-height:1.2;letter-spacing:-.055em;margin-bottom:18px}
    .intro-copy{max-width:780px;color:var(--muted);font-size:17px}
    .section{padding:92px 0}
    .section-head{max-width:760px;margin-bottom:40px}
    .section-kicker{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em}
    .section h2{font-size:clamp(28px,3.4vw,42px);line-height:1.3;letter-spacing:-.045em;margin:10px 0 16px}
    .section-head p{color:var(--muted);font-size:16px;margin-bottom:0}
    .topic-nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
    .topic-nav span{background:#f4f7fb;border:1px solid var(--line);border-radius:10px;padding:10px 16px;color:#49607b;font-size:14px}
    .topic-nav span.active{background:#eaf2ff;color:var(--blue);border-color:#bcd3fa;font-weight:700}
    .deploy-list{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .deploy-item,.chain-card,.support-item,.faq{background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:.25s}
    .deploy-item{display:grid;grid-template-columns:68px 1fr;gap:20px;padding:25px}
    .deploy-item:hover,.chain-card:hover,.support-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .item-no{font-size:30px;font-weight:800;color:var(--blue);line-height:1}
    .deploy-item h3{font-size:20px;margin:0 0 7px}
    .deploy-item p,.chain-card p,.support-item p{font-size:14px;color:var(--muted);margin:0}
    .specs{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
    .specs span{font-size:12px;color:#4b6480;background:#f3f7fb;border-radius:6px;padding:4px 8px}
    .visual-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:25px;align-items:stretch}
    .visual-card{border-radius:22px;overflow:hidden;background:#10233f;min-height:360px;position:relative}
    .visual-card img{width:100%;height:100%;object-fit:cover;opacity:.72}
    .visual-caption{position:absolute;left:30px;right:30px;bottom:25px;color:#fff}
    .visual-caption h3{font-size:25px;margin-bottom:8px}
    .visual-caption p{color:#d1e1f5;font-size:14px;margin:0}
    .chain-wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .chain-card{padding:24px;position:relative}
    .chain-card strong{display:block;color:var(--blue);font-size:13px;margin-bottom:12px}
    .chain-card h3{font-size:18px;margin-bottom:8px}
    .arrow{position:absolute;right:-14px;top:48%;color:var(--mint);font-size:22px;z-index:2}
    .compare-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow)}
    table{width:100%;min-width:680px;border-collapse:collapse;font-size:14px}
    th,td{text-align:left;padding:18px 20px;border-bottom:1px solid var(--line)}
    th{background:#edf4ff;color:var(--blue-dark);font-weight:800}
    td:first-child{font-weight:700;color:var(--ink)}
    tr:last-child td{border-bottom:0}
    .release{background:#10233f;color:#fff}
    .release .section-head p{color:#b8cce5}
    .release-flow{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .release-step{border:1px solid rgba(188,216,250,.2);border-radius:15px;padding:21px;background:rgba(255,255,255,.05)}
    .release-step b{display:block;color:#8fe0ce;font-size:13px;margin-bottom:15px}
    .release-step h3{font-size:17px;margin-bottom:7px}
    .release-step p{font-size:13px;color:#bdcee3;margin:0}
    .support-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .support-item{padding:24px}
    .support-icon{width:38px;height:38px;border-radius:11px;background:#eaf2ff;color:var(--blue);display:grid;place-items:center;font-weight:800;margin-bottom:18px}
    .support-item h3{font-size:18px;margin-bottom:8px}
    .faq-list{max-width:860px}
    .faq{margin-bottom:10px;overflow:hidden}
    .faq button{display:flex;justify-content:space-between;gap:20px;width:100%;text-align:left;border:0;background:transparent;padding:20px 23px;font-weight:700;color:var(--ink)}
    .faq button span:last-child{color:var(--blue);font-size:22px;line-height:1}
    .faq-answer{display:none;padding:0 23px 20px;color:var(--muted);font-size:14px}
    .faq.open .faq-answer{display:block}
    .cta{background:#eaf2ff}
    .cta-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:45px;align-items:start}
    .cta-copy p{color:var(--muted);font-size:16px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}
    .field input,.field select,.field textarea{width:100%;border:1px solid #cfdced;background:#fff;border-radius:9px;padding:11px 13px;color:var(--ink)}
    .field textarea{min-height:105px;resize:vertical}
    .field.full{grid-column:1/-1}
    .form-note{font-size:12px;color:var(--muted);margin-top:10px}
    .footer{background:#0f2039;color:#c4d4e9;padding:65px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.3fr .8fr .8fr 1fr;gap:35px}
    .footer .brand{color:#fff}
    .footer h3{font-size:14px;color:#fff;margin:0 0 15px}
    .footer a{display:block;font-size:13px;margin:8px 0;color:#b7c8dc}
    .footer a:hover{color:#fff}
    .footer p{font-size:13px;color:#aebfd4}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:18px;font-size:12px;color:#91a6c1;display:flex;justify-content:space-between;gap:15px}
    @media(max-width:1024px){
      .desktop-nav{display:none}.header-main .container{min-height:68px}.mobile-toggle{display:block}
      .mobile-nav{padding:8px 20px 18px;background:#fff;border-top:1px solid var(--line)}
      .mobile-nav.show{display:grid}.mobile-nav .nav-link{padding:12px 4px}
      .mobile-nav .nav-link.active:after{display:none}
      .chain-wrap,.release-flow{grid-template-columns:repeat(2,1fr)}
      .arrow{display:none}
    }
    @media(max-width:768px){
      .container{width:min(100% - 30px,1200px)}.topline .container{padding:7px 0;display:block;text-align:center}
      .topline .business-tags{display:none}.header-main .btn{display:none}
      .page-intro{padding:58px 0 46px}.section{padding:70px 0}
      .deploy-list,.visual-grid,.cta-grid{grid-template-columns:1fr}
      .support-grid{grid-template-columns:1fr 1fr}
      .visual-card{min-height:290px}.footer-grid{grid-template-columns:1fr 1fr}
      .copyright{display:block}.copyright span{display:block;margin-bottom:8px}
    }
    @media(max-width:520px){
      h1{font-size:36px}.intro-copy{font-size:15px}.deploy-item{grid-template-columns:48px 1fr;padding:20px;gap:14px}
      .deploy-item h3{font-size:18px}.chain-wrap,.release-flow,.support-grid,.form-grid,.footer-grid{grid-template-columns:1fr}
      .visual-card{min-height:245px}.visual-caption{left:20px;right:20px}.visual-caption h3{font-size:21px}
      .section h2{font-size:29px}.btn{width:100%}.topic-nav span{flex:1;text-align:center}
    }