/* roulang page: index */
:root{
            --ink:#172927;
            --muted:#647572;
            --soft:#edf4f0;
            --paper:#f7faf7;
            --card:#ffffff;
            --line:#dce8e2;
            --green:#087f69;
            --green-dark:#07584c;
            --mint:#bfe8d7;
            --orange:#f28c45;
            --orange-dark:#d96b28;
            --shadow:0 18px 50px rgba(18,63,53,.10);
            --small-shadow:0 8px 24px rgba(18,63,53,.08);
            --radius:18px;
            --container:1200px;
        }
        *{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth}
        body{
            background:var(--paper);
            color:var(--ink);
            font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;
            line-height:1.65;
            font-size:16px;
        }
        a{color:inherit;text-decoration:none}
        img{display:block;max-width:100%}
        button,input{font:inherit}
        button{cursor:pointer}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .site-header{
            position:sticky;top:0;z-index:20;
            background:rgba(247,250,247,.92);
            border-bottom:1px solid rgba(220,232,226,.85);
            backdrop-filter:blur(16px);
        }
        .nav-wrap{height:78px;display:flex;align-items:center;gap:34px}
        .brand{display:flex;align-items:center;gap:11px;min-width:265px}
        .brand-mark{
            width:40px;height:40px;border-radius:12px;background:var(--green);
            color:#fff;display:grid;place-items:center;font-size:20px;font-weight:800;
            box-shadow:0 7px 16px rgba(8,127,105,.24)
        }
        .brand-text{display:flex;flex-direction:column;line-height:1.2}
        .brand-text strong{font-size:15px;letter-spacing:.01em}
        .brand-text span{font-size:11px;color:var(--green);margin-top:4px;font-weight:700}
        .main-nav{display:flex;align-items:center;gap:7px;flex:1}
        .main-nav a{
            padding:10px 14px;border-radius:9px;color:#49605b;font-size:14px;
            transition:.22s ease;
        }
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--green-dark);background:var(--soft)}
        .main-nav a.active{font-weight:800}
        .nav-action,.btn{
            min-height:44px;display:inline-flex;align-items:center;justify-content:center;
            border-radius:10px;padding:0 20px;font-weight:800;font-size:14px;
            transition:transform .22s ease,background .22s ease,box-shadow .22s ease;
        }
        .nav-action,.btn-primary{background:var(--orange);color:#fff;box-shadow:0 8px 18px rgba(242,140,69,.22)}
        .nav-action:hover,.btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px)}
        .btn-secondary{border:1px solid #afd5c7;background:#fff;color:var(--green-dark)}
        .btn-secondary:hover{background:var(--soft);transform:translateY(-2px)}
        .menu-toggle{display:none;border:0;background:transparent;color:var(--green-dark);font-size:25px}
        .hero{
            position:relative;overflow:hidden;padding:92px 0 82px;
            background:linear-gradient(135deg,#e9f5ef 0%,#f7faf7 64%,#fff0e5 100%);
        }
        .hero:before,.hero:after{content:"";position:absolute;border-radius:50%;pointer-events:none}
        .hero:before{width:420px;height:420px;background:rgba(191,232,215,.38);right:-150px;top:-170px}
        .hero:after{width:240px;height:240px;background:rgba(242,140,69,.12);left:-110px;bottom:-110px}
        .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1fr .9fr;gap:70px;align-items:center}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-weight:800;font-size:13px;margin-bottom:18px}
        .eyebrow:before{content:"";width:24px;height:3px;border-radius:3px;background:var(--orange)}
        h1{font-size:clamp(34px,4.4vw,56px);line-height:1.16;letter-spacing:-.04em;max-width:680px}
        .hero-copy{margin:22px 0 28px;max-width:620px;color:#536761;font-size:17px}
        .hero-buttons{display:flex;gap:12px;flex-wrap:wrap}
        .hero-note{display:flex;gap:18px;flex-wrap:wrap;margin-top:25px;color:var(--muted);font-size:13px}
        .hero-note span{display:flex;align-items:center;gap:7px}
        .hero-note i{width:7px;height:7px;border-radius:50%;background:var(--green);display:inline-block}
        .screen-stage{position:relative;min-height:370px}
        .sim-window{
            position:absolute;inset:14px 0 0 28px;background:#123630;border-radius:22px;
            padding:18px;box-shadow:var(--shadow);transform:rotate(2deg)
        }
        .window-bar{display:flex;align-items:center;gap:6px;border-bottom:1px solid rgba(255,255,255,.14);padding-bottom:14px}
        .window-bar b{width:8px;height:8px;border-radius:50%;background:#f28c45}
        .window-bar b:nth-child(2){background:#bfe8d7}.window-bar b:nth-child(3){background:#77cbb4}
        .window-bar span{margin-left:auto;color:#9bc6ba;font-size:11px}
        .screen-content{display:grid;grid-template-columns:1.1fr .9fr;gap:13px;padding-top:17px;height:290px}
        .screen-main{border-radius:14px;background:linear-gradient(145deg,#1a6557,#0d4038);padding:20px;color:#fff;display:flex;flex-direction:column;justify-content:space-between}
        .screen-main small{color:#bfe8d7;font-weight:700}
        .screen-main strong{font-size:25px;line-height:1.25}
        .screen-line{height:8px;background:rgba(255,255,255,.17);border-radius:8px;width:80%}
        .screen-line.short{width:55%;background:#f28c45}
        .screen-side{display:grid;grid-template-columns:1fr 1fr;gap:10px}
        .game-tile{border-radius:12px;background:#eff8f2;color:var(--green-dark);display:flex;align-items:end;padding:10px;font-size:12px;font-weight:800}
        .game-tile:nth-child(2){background:#ffe6d4}.game-tile:nth-child(3){background:#d5eee5}.game-tile:nth-child(4){background:#f6efd9}
        .floating-label{position:absolute;left:0;bottom:20px;padding:13px 17px;background:#fff;border:1px solid var(--line);border-radius:13px;box-shadow:var(--small-shadow);font-size:13px;font-weight:800;color:var(--green-dark)}
        .section{padding:88px 0}
        .section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:31px}
        .section-kicker{color:var(--orange-dark);font-size:12px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}
        h2{font-size:clamp(27px,3vw,38px);line-height:1.2;letter-spacing:-.03em;margin-top:7px}
        .section-head p{max-width:440px;color:var(--muted);font-size:14px}
        .quick-grid{display:grid;grid-template-columns:1.25fr .9fr .9fr;gap:16px}
        .quick-card{
            min-height:190px;border:1px solid var(--line);border-radius:var(--radius);padding:26px;
            background:#fff;position:relative;overflow:hidden;transition:.25s ease;
        }
        .quick-card:first-child{background:var(--green);color:#fff;min-height:220px;transform:translateY(14px)}
        .quick-card:hover{transform:translateY(-4px);box-shadow:var(--small-shadow);border-color:#abd7c7}
        .quick-card:first-child:hover{transform:translateY(8px)}
        .quick-icon{width:38px;height:38px;display:grid;place-items:center;border-radius:11px;background:var(--soft);color:var(--green);font-weight:900;margin-bottom:20px}
        .quick-card:first-child .quick-icon{background:rgba(255,255,255,.15);color:#fff}
        .quick-card h3{font-size:20px;margin-bottom:8px}
        .quick-card p{color:var(--muted);font-size:13px;max-width:260px}
        .quick-card:first-child p{color:#d9eee7}
        .arrow{position:absolute;right:25px;bottom:24px;font-size:22px;color:var(--orange)}
        .feature-band{background:#123630;color:#fff;padding:88px 0}
        .feature-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:75px;align-items:start}
        .feature-band .section-kicker{color:#f9ad72}
        .feature-band h2{max-width:390px}
        .feature-intro{color:#b9d2ca;margin-top:18px;font-size:15px}
        .steps{border-top:1px solid rgba(255,255,255,.16)}
        .step{display:grid;grid-template-columns:56px 1fr 120px;gap:20px;align-items:center;padding:23px 0;border-bottom:1px solid rgba(255,255,255,.16)}
        .step-num{font-size:14px;color:#f9ad72;font-weight:900}
        .step h3{font-size:18px;margin-bottom:4px}
        .step p{color:#b9d2ca;font-size:13px}
        .step-tag{justify-self:end;border:1px solid rgba(191,232,215,.3);color:#bfe8d7;padding:5px 9px;border-radius:7px;font-size:11px}
        .info-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:28px}
        .news-panel,.download-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--small-shadow)}
        .news-panel{padding:10px 27px}
        .news-item{display:grid;grid-template-columns:58px 1fr auto;gap:18px;align-items:center;padding:20px 0;border-bottom:1px solid var(--line)}
        .news-item:last-child{border-bottom:0}
        .news-index{color:var(--orange);font-size:22px;font-weight:900}
        .news-meta{display:flex;gap:10px;align-items:center;color:#8a9a96;font-size:12px}
        .tag{display:inline-block;background:var(--soft);color:var(--green);padding:3px 8px;border-radius:5px;font-size:11px;font-weight:800}
        .news-item h3{font-size:16px;margin:3px 0 3px}
        .news-item p{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:520px}
        .news-arrow{color:var(--green);font-size:20px}
        .download-card{padding:29px;background:#fff4eb;border-color:#f6d7bd}
        .download-card h3{font-size:23px;margin:8px 0 11px}
        .download-card p{color:#806c60;font-size:14px}
        .download-spec{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:24px 0}
        .spec{background:#fff;border-radius:10px;padding:12px;border:1px solid #f1ddce}
        .spec small{display:block;color:#9c8170;font-size:11px}.spec strong{font-size:14px}
        .download-card .btn{width:100%}
        .faq-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:60px}
        .faq-intro p{color:var(--muted);font-size:15px;margin-top:16px}
        .faq-list{border-top:1px solid var(--line)}
        details{border-bottom:1px solid var(--line);padding:18px 0}
        summary{cursor:pointer;list-style:none;font-weight:800;display:flex;justify-content:space-between;gap:20px}
        summary::-webkit-details-marker{display:none}
        summary:after{content:"+";color:var(--orange);font-size:23px;line-height:1}
        details[open] summary:after{content:"−"}
        details p{color:var(--muted);font-size:14px;padding:13px 30px 0 0}
        .cta{padding:64px 0}
        .cta-box{background:var(--mint);border-radius:24px;padding:43px 50px;display:flex;align-items:center;justify-content:space-between;gap:30px}
        .cta-box h2{font-size:30px}.cta-box p{color:#41665b;margin-top:7px}
        .cta-buttons{display:flex;gap:10px;flex-shrink:0}
        .site-footer{background:#102e2a;color:#d9eee7;padding:54px 0 22px}
        .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:45px;padding-bottom:42px}
        .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:15px}
        .footer-brand .brand-mark{background:#35a88d}
        .footer-description{color:#9dbbb2;font-size:13px;max-width:360px}
        .footer-col h3{color:#fff;font-size:14px;margin-bottom:15px}
        .footer-col a{display:block;color:#9dbbb2;font-size:13px;margin:9px 0;transition:.2s}
        .footer-col a:hover{color:#fff}
        .footer-bottom{border-top:1px solid rgba(255,255,255,.13);padding-top:19px;display:flex;justify-content:space-between;gap:15px;color:#87a69d;font-size:12px}
        .empty-state{padding:35px 10px;text-align:center;color:var(--muted);font-size:14px}
        :focus-visible{outline:3px solid rgba(242,140,69,.55);outline-offset:3px}
        @media(max-width:1024px){
            .nav-wrap{gap:15px}.brand{min-width:230px}.main-nav a{padding:9px 8px}
            .hero-grid{gap:35px}.feature-layout{gap:40px}.info-layout{grid-template-columns:1fr}
        }
        @media(max-width:768px){
            .container{width:min(100% - 34px,var(--container))}
            .nav-wrap{height:68px}.brand{min-width:0;flex:1}.brand-text strong{font-size:13px}.brand-text span{font-size:10px}
            .main-nav{display:none;position:absolute;left:17px;right:17px;top:75px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
            .main-nav.open{display:flex}.main-nav a{padding:12px 14px}.nav-action{padding:0 13px;font-size:13px}.menu-toggle{display:block}
            .hero{padding:65px 0 60px}.hero-grid,.feature-layout,.faq-grid{grid-template-columns:1fr}
            .hero-copy{font-size:16px}.screen-stage{min-height:340px;margin-top:15px}.sim-window{inset:10px 4px 0 12px}
            .section{padding:62px 0}.section-head{display:block}.section-head p{margin-top:13px}
            .quick-grid{grid-template-columns:1fr}.quick-card:first-child{transform:none}.quick-card:first-child:hover{transform:translateY(-4px)}
            .step{grid-template-columns:42px 1fr}.step-tag{grid-column:2;justify-self:start;margin-top:-12px}
            .faq-grid{gap:30px}.cta-box{padding:32px 25px;display:block}.cta-buttons{margin-top:22px;flex-wrap:wrap}
            .footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-grid > :first-child{grid-column:1/-1}
        }
        @media(max-width:520px){
            h1{font-size:34px}.hero-buttons .btn{width:100%}.hero-note{gap:10px;display:grid}
            .screen-content{grid-template-columns:1fr}.screen-side{display:none}.screen-main strong{font-size:22px}
            .news-panel{padding:5px 17px}.news-item{grid-template-columns:34px 1fr 18px;gap:10px}.news-item p{max-width:220px}.news-item h3{font-size:14px}
            .download-spec{gap:7px}.footer-grid{grid-template-columns:1fr}.footer-grid > :first-child{grid-column:auto}
            .footer-bottom{display:block}.footer-bottom span{display:block;margin-top:8px}
        }

/* roulang page: article */
:root{
            --ink:#172927;
            --muted:#647572;
            --soft:#edf4f0;
            --paper:#f7faf7;
            --card:#ffffff;
            --line:#dce8e2;
            --green:#087f69;
            --green-dark:#07584c;
            --mint:#bfe8d7;
            --orange:#f28c45;
            --orange-dark:#d96b28;
            --shadow:0 18px 50px rgba(18,63,53,.10);
            --small-shadow:0 8px 24px rgba(18,63,53,.08);
            --radius:18px;
            --container:1200px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            background:var(--paper);
            color:var(--ink);
            font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;
            line-height:1.65;
            font-size:16px;
        }
        a{color:inherit;text-decoration:none}
        a:hover{text-decoration:none}
        img{display:block;max-width:100%;height:auto}
        button,input{font:inherit}
        button{cursor:pointer}
        :focus-visible{outline:3px solid rgba(242,140,69,.48);outline-offset:3px}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .site-header{
            position:sticky;top:0;z-index:20;
            background:rgba(247,250,247,.94);
            border-bottom:1px solid rgba(220,232,226,.85);
            backdrop-filter:blur(16px);
        }
        .nav-wrap{height:78px;display:flex;align-items:center;gap:34px}
        .brand{display:flex;align-items:center;gap:11px;min-width:265px}
        .brand-mark{
            width:40px;height:40px;border-radius:12px;background:var(--green);
            color:#fff;display:grid;place-items:center;font-size:20px;font-weight:800;
            box-shadow:0 7px 16px rgba(8,127,105,.24)
        }
        .brand-text{display:flex;flex-direction:column;line-height:1.2}
        .brand-text strong{font-size:15px;letter-spacing:.01em}
        .brand-text span{font-size:11px;color:var(--green);margin-top:4px;font-weight:700}
        .main-nav{display:flex;align-items:center;gap:7px;flex:1}
        .main-nav a{
            padding:10px 14px;border-radius:9px;color:#49605b;font-size:14px;
            transition:.22s ease;
        }
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{
            color:var(--green-dark);background:var(--soft)
        }
        .main-nav a.active{font-weight:800}
        .nav-action,.btn{
            min-height:44px;display:inline-flex;align-items:center;justify-content:center;
            border-radius:10px;padding:0 20px;font-weight:800;font-size:14px;
            transition:transform .22s ease,background .22s ease,box-shadow .22s ease;
        }
        .nav-action,.btn-primary{
            background:var(--orange);color:#fff;
            box-shadow:0 8px 18px rgba(242,140,69,.22)
        }
        .nav-action:hover,.btn-primary:hover{
            background:var(--orange-dark);color:#fff;transform:translateY(-2px)
        }
        .btn-secondary{border:1px solid #afd5c7;background:#fff;color:var(--green-dark)}
        .btn-secondary:hover{background:var(--soft);color:var(--green-dark);transform:translateY(-2px)}
        .menu-toggle{display:none;border:0;background:transparent;color:var(--green-dark);font-size:25px}
        .article-hero{
            position:relative;overflow:hidden;padding:76px 0 68px;
            background:linear-gradient(135deg,#e9f5ef 0%,#f7faf7 68%,#fff0e5 100%);
            border-bottom:1px solid var(--line);
        }
        .article-hero:before,.article-hero:after{
            content:"";position:absolute;border-radius:50%;pointer-events:none
        }
        .article-hero:before{
            width:360px;height:360px;right:-120px;top:-180px;
            background:rgba(191,232,215,.42)
        }
        .article-hero:after{
            width:190px;height:190px;left:-90px;bottom:-110px;
            background:rgba(242,140,69,.13)
        }
        .article-hero-inner{position:relative;z-index:1;max-width:900px}
        .eyebrow{
            display:inline-flex;align-items:center;gap:8px;color:var(--green);
            font-weight:800;font-size:13px;margin-bottom:18px
        }
        .eyebrow:before{
            content:"";width:24px;height:3px;border-radius:3px;background:var(--orange)
        }
        h1,h2,h3,p{margin-top:0}
        h1{
            margin-bottom:20px;font-size:clamp(34px,5vw,54px);
            line-height:1.18;letter-spacing:-.035em;font-weight:900;
            max-width:880px
        }
        .article-lead{
            max-width:760px;color:#536761;font-size:17px;margin-bottom:28px
        }
        .article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;color:var(--muted);font-size:13px}
        .tag{
            display:inline-block;background:var(--soft);color:var(--green);
            padding:4px 10px;border-radius:6px;font-size:11px;font-weight:800
        }
        .meta-dot{width:4px;height:4px;border-radius:50%;background:#a5b7b0}
        .breadcrumb-wrap{padding:24px 0 0}
        .breadcrumb{
            display:flex;flex-wrap:wrap;gap:8px;align-items:center;
            color:var(--muted);font-size:13px;margin:0
        }
        .breadcrumb a{color:var(--green);font-weight:700}
        .breadcrumb a:hover{color:var(--orange-dark)}
        .breadcrumb-separator{color:#a8b7b1}
        .article-section{padding:42px 0 88px}
        .article-layout{
            display:grid;grid-template-columns:minmax(0,850px) 250px;
            gap:56px;align-items:start;justify-content:center
        }
        .article-card{
            background:var(--card);border:1px solid var(--line);
            border-radius:var(--radius);box-shadow:var(--small-shadow);
            padding:clamp(26px,4vw,58px)
        }
        .article-card .content-intro{
            margin:-8px 0 32px;padding:18px 20px;
            border-left:4px solid var(--orange);background:#fff8f2;
            color:#5b6965;border-radius:0 10px 10px 0
        }
        .article-content{font-size:16px;color:#344844;line-height:1.9;overflow-wrap:anywhere}
        .article-content h2{
            color:var(--ink);font-size:28px;line-height:1.3;
            margin:42px 0 16px;padding-left:15px;
            border-left:4px solid var(--green)
        }
        .article-content h3{
            color:var(--green-dark);font-size:21px;line-height:1.4;
            margin:30px 0 12px
        }
        .article-content p{margin-bottom:20px}
        .article-content ul,.article-content ol{padding-left:25px;margin:14px 0 24px}
        .article-content li{margin:8px 0}
        .article-content blockquote{
            margin:25px 0;padding:20px 24px;background:var(--soft);
            border-radius:12px;color:var(--green-dark)
        }
        .article-content img{border-radius:14px;margin:25px auto 8px;border:1px solid var(--line)}
        .article-content figure{margin:28px 0}
        .article-content figcaption{
            color:var(--muted);font-size:13px;text-align:center
        }
        .article-content code{
            background:#eef2ef;color:var(--green-dark);padding:2px 6px;
            border-radius:5px;font-size:.92em
        }
        .article-content table{
            width:100%;border-collapse:collapse;margin:25px 0;
            border:1px solid var(--line)
        }
        .article-content th,.article-content td{
            padding:11px 13px;border:1px solid var(--line);text-align:left
        }
        .article-content th{background:var(--soft);color:var(--green-dark)}
        .reading-aside{
            position:sticky;top:105px;border:1px solid var(--line);
            background:#fff;border-radius:15px;padding:22px
        }
        .reading-aside h2{
            font-size:16px;margin-bottom:15px;color:var(--green-dark)
        }
        .reading-aside a{
            display:block;padding:10px 0;border-bottom:1px solid var(--line);
            color:var(--muted);font-size:13px
        }
        .reading-aside a:last-child{border-bottom:0}
        .reading-aside a:hover{color:var(--orange-dark)}
        .not-found{
            padding:60px 20px;text-align:center;background:#fff;
            border:1px solid var(--line);border-radius:var(--radius)
        }
        .not-found h2{font-size:28px;margin-bottom:12px}
        .not-found p{color:var(--muted);margin-bottom:24px}
        .related-section{padding:0 0 84px}
        .section-head{
            display:flex;align-items:end;justify-content:space-between;
            gap:25px;margin-bottom:28px
        }
        .section-kicker{
            color:var(--orange-dark);font-size:12px;font-weight:900;
            letter-spacing:.12em;text-transform:uppercase;margin-bottom:8px
        }
        .section-head h2{font-size:32px;margin-bottom:0;line-height:1.25}
        .section-head p{max-width:440px;color:var(--muted);font-size:14px;margin-bottom:0}
        .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
        .related-card{
            position:relative;min-height:190px;padding:24px;
            background:#fff;border:1px solid var(--line);border-radius:var(--radius);
            transition:.25s ease
        }
        .related-card:hover{transform:translateY(-4px);box-shadow:var(--small-shadow);border-color:#abd7c7}
        .related-card h3{font-size:18px;line-height:1.45;margin:14px 0 8px}
        .related-card p{color:var(--muted);font-size:13px;margin-bottom:25px}
        .card-link{color:var(--green);font-size:13px;font-weight:800}
        .card-link span{color:var(--orange);font-size:18px;margin-left:5px}
        .cta-band{padding:62px 0;background:#123630;color:#fff}
        .cta-box{
            display:flex;align-items:center;justify-content:space-between;
            gap:28px
        }
        .cta-band .section-kicker{color:#f9ad72}
        .cta-band h2{font-size:30px;line-height:1.3;margin-bottom:10px}
        .cta-band p{color:#b9d2ca;margin-bottom:0;max-width:650px}
        .site-footer{padding:62px 0 24px;background:#0d2925;color:#fff}
        .footer-grid{
            display:grid;grid-template-columns:1.5fr .7fr .8fr;gap:60px;
            padding-bottom:45px;border-bottom:1px solid rgba(191,232,215,.16)
        }
        .footer-brand{display:flex;align-items:center;gap:11px;width:max-content}
        .footer-brand .brand-mark{background:#1b7968}
        .footer-brand strong{font-size:16px}
        .footer-brand small{font-size:11px}
        .footer-description{max-width:370px;color:#9bbab0;font-size:13px;margin:20px 0 0}
        .footer-col{display:flex;flex-direction:column;gap:10px}
        .footer-col h3{font-size:14px;margin:2px 0 8px;color:#e8f4ef}
        .footer-col a{color:#9bbab0;font-size:13px;transition:.2s}
        .footer-col a:hover{color:#f9ad72;transform:translateX(2px)}
        .footer-bottom{
            display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
            padding-top:22px;color:#78978d;font-size:12px
        }
        @media(max-width:1024px){
            .nav-wrap{gap:18px}.brand{min-width:235px}
            .main-nav a{padding:9px 9px;font-size:13px}
            .article-layout{grid-template-columns:minmax(0,1fr) 220px;gap:28px}
        }
        @media(max-width:768px){
            .container{width:min(var(--container),calc(100% - 32px))}
            .nav-wrap{height:70px;justify-content:space-between}
            .brand{min-width:0}.brand-text strong{font-size:13px}
            .brand-text span{font-size:10px}
            .main-nav{
                display:none;position:absolute;left:16px;right:16px;top:65px;
                padding:10px;background:#fff;border:1px solid var(--line);
                border-radius:14px;box-shadow:var(--shadow);flex-direction:column;
                align-items:stretch;gap:3px
            }
            .main-nav.open{display:flex}
            .main-nav a{padding:12px 14px}
            .nav-action{min-height:40px;padding:0 13px;font-size:12px}
            .menu-toggle{display:block}
            .article-hero{padding:58px 0 52px}
            h1{font-size:36px}
            .article-layout{display:block}
            .reading-aside{display:none}
            .article-section{padding:28px 0 65px}
            .article-card{padding:25px 20px}
            .article-content h2{font-size:24px;margin-top:34px}
            .related-grid{grid-template-columns:1fr}
            .related-section{padding-bottom:62px}
            .cta-box{display:block}
            .cta-box .btn{margin-top:24px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
            .footer-grid>div:first-child{grid-column:1/-1}
        }
        @media(max-width:520px){
            .brand-mark{width:36px;height:36px;font-size:18px;border-radius:10px}
            .brand-text strong{font-size:12px}
            .brand-text span{font-size:9px}
            .nav-action{display:none}
            .article-hero{padding:48px 0 42px}
            h1{font-size:31px}
            .article-lead{font-size:15px}
            .article-meta{gap:8px;font-size:12px}
            .article-card{border-radius:14px;padding:22px 17px}
            .article-content{font-size:15px;line-height:1.85}
            .article-content h2{font-size:22px;padding-left:11px}
            .section-head{display:block}
            .section-head h2{font-size:27px;margin-bottom:10px}
            .footer-grid{grid-template-columns:1fr}
            .footer-grid>div:first-child{grid-column:auto}
            .footer-bottom{display:block}
            .footer-bottom span{display:block;margin-bottom:8px}
        }

/* roulang page: category1 */
:root{
            --ink:#172927;
            --muted:#647572;
            --soft:#edf4f0;
            --paper:#f7faf7;
            --card:#ffffff;
            --line:#dce8e2;
            --green:#087f69;
            --green-dark:#07584c;
            --mint:#bfe8d7;
            --orange:#f28c45;
            --orange-dark:#d96b28;
            --shadow:0 18px 50px rgba(18,63,53,.10);
            --small-shadow:0 8px 24px rgba(18,63,53,.08);
            --radius:18px;
            --container:1200px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            background:var(--paper);
            color:var(--ink);
            font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;
            line-height:1.65;
            font-size:16px;
        }
        a{color:inherit;text-decoration:none}
        a:focus,button:focus{outline:3px solid rgba(242,140,69,.42);outline-offset:3px}
        img{display:block;max-width:100%}
        button,input{font:inherit}
        button{cursor:pointer}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .site-header{
            position:sticky;top:0;z-index:20;
            background:rgba(247,250,247,.94);
            border-bottom:1px solid rgba(220,232,226,.85);
            backdrop-filter:blur(16px);
        }
        .nav-wrap{height:78px;display:flex;align-items:center;gap:34px}
        .brand{display:flex;align-items:center;gap:11px;min-width:265px}
        .brand-mark{
            width:40px;height:40px;border-radius:12px;background:var(--green);
            color:#fff;display:grid;place-items:center;font-size:20px;font-weight:800;
            box-shadow:0 7px 16px rgba(8,127,105,.24)
        }
        .brand-text{display:flex;flex-direction:column;line-height:1.2}
        .brand-text strong{font-size:15px;letter-spacing:.01em}
        .brand-text span{font-size:11px;color:var(--green);margin-top:4px;font-weight:700}
        .main-nav{display:flex;align-items:center;gap:7px;flex:1}
        .main-nav a{
            padding:10px 14px;border-radius:9px;color:#49605b;font-size:14px;
            transition:.22s ease;
        }
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{
            color:var(--green-dark);background:var(--soft)
        }
        .main-nav a.active{font-weight:800}
        .nav-action,.btn{
            min-height:44px;display:inline-flex;align-items:center;justify-content:center;
            border-radius:10px;padding:0 20px;font-weight:800;font-size:14px;
            transition:transform .22s ease,background .22s ease,box-shadow .22s ease;
        }
        .nav-action,.btn-primary{
            background:var(--orange);color:#fff;box-shadow:0 8px 18px rgba(242,140,69,.22)
        }
        .nav-action:hover,.btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px)}
        .btn-secondary{border:1px solid #afd5c7;background:#fff;color:var(--green-dark)}
        .btn-secondary:hover{background:var(--soft);transform:translateY(-2px)}
        .menu-toggle{display:none;border:0;background:transparent;color:var(--green-dark);font-size:25px}
        .hero{
            position:relative;overflow:hidden;padding:86px 0 76px;
            background:linear-gradient(135deg,#e9f5ef 0%,#f7faf7 64%,#fff0e5 100%);
        }
        .hero:before,.hero:after{content:"";position:absolute;border-radius:50%;pointer-events:none}
        .hero:before{width:420px;height:420px;background:rgba(191,232,215,.38);right:-150px;top:-170px}
        .hero:after{width:240px;height:240px;background:rgba(242,140,69,.12);left:-110px;bottom:-110px}
        .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1fr .92fr;gap:68px;align-items:center}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-weight:800;font-size:13px;margin-bottom:18px}
        .eyebrow:before{content:"";width:24px;height:3px;border-radius:3px;background:var(--orange)}
        h1,h2,h3{margin-top:0;letter-spacing:-.025em}
        h1{font-size:clamp(36px,5vw,58px);line-height:1.12;margin-bottom:20px;max-width:660px}
        h2{font-size:clamp(28px,3.2vw,40px);line-height:1.2}
        .hero-copy{margin:0 0 28px;max-width:620px;color:#536761;font-size:17px}
        .hero-buttons{display:flex;gap:12px;flex-wrap:wrap}
        .hero-note{display:flex;gap:18px;flex-wrap:wrap;margin-top:25px;color:var(--muted);font-size:13px}
        .hero-note span{display:flex;align-items:center;gap:7px}
        .hero-note i{width:7px;height:7px;border-radius:50%;background:var(--green);display:inline-block}
        .simulator-window{
            min-height:350px;border-radius:20px;background:#123630;color:#fff;
            padding:20px;box-shadow:var(--shadow);position:relative;overflow:hidden;
        }
        .window-top{display:flex;justify-content:space-between;align-items:center;color:#bfe8d7;font-size:12px}
        .window-dots{display:flex;gap:6px}.window-dots i{width:8px;height:8px;border-radius:50%;background:#f28c45}
        .window-screen{margin-top:25px;padding:25px;border:1px solid rgba(191,232,215,.24);border-radius:14px;background:linear-gradient(145deg,#1b6658,#0d4038)}
        .window-screen small{color:#bfe8d7;font-weight:700}
        .window-screen strong{display:block;font-size:28px;line-height:1.25;margin:10px 0 22px}
        .screen-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:9px}
        .screen-grid span{height:46px;border-radius:9px;background:rgba(191,232,215,.16);border:1px solid rgba(191,232,215,.2)}
        .screen-grid span:nth-child(2n){background:rgba(242,140,69,.45)}
        .section{padding:86px 0}
        .section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:32px}
        .section-kicker{color:var(--orange-dark);font-size:12px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}
        .section-head p{max-width:460px;color:var(--muted);font-size:14px;margin:0}
        .intro-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:54px;align-items:start}
        .intro-layout>div:first-child{padding-top:10px}
        .intro-layout h2{max-width:420px}
        .intro-text{color:var(--muted);font-size:16px}
        .topic-list{border-top:1px solid var(--line)}
        .topic-row{display:grid;grid-template-columns:70px 1fr auto;gap:20px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line);transition:.22s ease}
        .topic-row:hover{padding-left:10px;background:rgba(237,244,240,.55)}
        .topic-no{font-size:13px;color:var(--orange-dark);font-weight:900}
        .topic-row h3{font-size:18px;margin-bottom:5px}
        .topic-row p{color:var(--muted);font-size:14px;margin:0}
        .topic-arrow{color:var(--green);font-size:22px}
        .green-band{background:#123630;color:#fff;padding:82px 0}
        .green-band .section-kicker{color:#f9ad72}
        .feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}
        .feature-card{padding:27px;border:1px solid rgba(191,232,215,.2);border-radius:16px;background:rgba(255,255,255,.06);transition:.25s ease}
        .feature-card:hover{background:rgba(255,255,255,.11);transform:translateY(-4px)}
        .feature-icon{width:42px;height:42px;border-radius:12px;background:var(--mint);color:var(--green-dark);display:grid;place-items:center;font-weight:900;margin-bottom:20px}
        .feature-card h3{font-size:19px;margin-bottom:9px}
        .feature-card p{margin:0;color:#b9d2ca;font-size:14px}
        .device-section{background:#edf4f0}
        .device-layout{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center}
        .device-board{min-height:330px;border-radius:20px;background:#fff;border:1px solid var(--line);padding:25px;box-shadow:var(--small-shadow);position:relative}
        .device-board:after{content:"";position:absolute;width:110px;height:180px;right:44px;bottom:-18px;border:7px solid #123630;border-radius:22px;background:linear-gradient(160deg,#bfe8d7,#087f69);box-shadow:0 12px 20px rgba(18,63,53,.18)}
        .board-label{display:inline-block;background:var(--soft);color:var(--green);font-size:12px;font-weight:800;padding:6px 10px;border-radius:7px}
        .board-lines{margin-top:34px;display:grid;gap:14px;width:58%}
        .board-lines span{height:12px;border-radius:10px;background:#dce8e2}
        .board-lines span:nth-child(2){width:78%;background:#bfe8d7}
        .board-lines span:nth-child(3){width:62%;background:#f8c29c}
        .check-list{list-style:none;padding:0;margin:24px 0 28px}
        .check-list li{display:flex;gap:11px;margin:13px 0;color:#4f655f}
        .check-list li:before{content:"✓";color:var(--green);font-weight:900}
        .faq-wrap{max-width:900px;margin:0 auto}
        .faq-item{border-bottom:1px solid var(--line)}
        .faq-question{width:100%;border:0;background:transparent;text-align:left;padding:22px 42px 22px 0;font-weight:800;color:var(--ink);position:relative}
        .faq-question:after{content:"+";position:absolute;right:5px;color:var(--green);font-size:24px;top:17px}
        .faq-item.open .faq-question:after{content:"−"}
        .faq-answer{display:none;color:var(--muted);font-size:14px;padding:0 45px 22px 0}
        .faq-item.open .faq-answer{display:block}
        .cta{padding:62px 0}
        .cta-box{border-radius:20px;background:var(--green);color:#fff;padding:42px 48px;display:flex;justify-content:space-between;align-items:center;gap:25px;box-shadow:var(--shadow)}
        .cta-box h2{font-size:30px;margin-bottom:8px}.cta-box p{color:#d4ebe2;margin:0}
        .site-footer{background:#123630;color:#fff;padding:58px 0 25px}
        .footer-grid{display:grid;grid-template-columns:1.5fr .8fr .8fr;gap:60px}
        .footer-brand{display:flex;align-items:center;gap:11px}
        .footer-description{color:#b9d2ca;font-size:14px;max-width:390px;margin:20px 0 0}
        .footer-col{display:flex;flex-direction:column;gap:10px}
        .footer-col h3{font-size:15px;color:#fff;margin-bottom:8px}
        .footer-col a{color:#b9d2ca;font-size:14px;transition:.2s ease}
        .footer-col a:hover{color:#f9ad72}
        .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(191,232,215,.18);margin-top:42px;padding-top:20px;color:#8cc8b5;font-size:12px}
        @media(max-width:1024px){
            .nav-wrap{gap:18px}.brand{min-width:220px}.main-nav a{padding:9px 8px}
            .hero-grid,.intro-layout,.device-layout{gap:35px}
        }
        @media(max-width:768px){
            .container{width:min(var(--container),calc(100% - 32px))}
            .nav-wrap{height:70px;justify-content:space-between}.brand{min-width:0}.brand-text strong{font-size:13px}
            .main-nav{display:none;position:absolute;left:16px;right:16px;top:78px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
            .main-nav.show{display:flex}.main-nav a{padding:13px 14px}
            .nav-action{display:none}.menu-toggle{display:block}
            .hero{padding:62px 0}.hero-grid,.intro-layout,.device-layout{grid-template-columns:1fr}
            h1{font-size:38px}.hero-copy{font-size:16px}.simulator-window{min-height:290px}
            .section{padding:62px 0}.section-head{display:block}.section-head p{margin-top:12px}
            .topic-row{grid-template-columns:45px 1fr auto;gap:12px}.feature-grid{grid-template-columns:1fr}
            .device-board{min-height:260px}.cta-box{display:block;padding:32px 25px}.cta-box .btn{margin-top:22px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:32px}.footer-grid>div:first-child{grid-column:1/-1}
            .footer-bottom{display:block}.footer-bottom span{display:block;margin-top:7px}
        }
        @media(max-width:520px){
            .brand-text span{font-size:10px}.hero-buttons .btn{width:100%}.hero-note{gap:10px;display:grid}
            .topic-row h3{font-size:16px}.topic-row p{font-size:13px}.topic-arrow{font-size:18px}
            .footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}
            .screen-grid{gap:6px}.screen-grid span{height:34px}
        }

/* roulang page: category2 */
:root{
            --ink:#172927;
            --muted:#647572;
            --soft:#edf4f0;
            --paper:#f7faf7;
            --card:#ffffff;
            --line:#dce8e2;
            --green:#087f69;
            --green-dark:#07584c;
            --mint:#bfe8d7;
            --orange:#f28c45;
            --orange-dark:#d96b28;
            --shadow:0 18px 50px rgba(18,63,53,.10);
            --small-shadow:0 8px 24px rgba(18,63,53,.08);
            --radius:18px;
            --container:1200px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;background:var(--paper);color:var(--ink);
            font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;
            line-height:1.65;font-size:16px;
        }
        a{color:inherit;text-decoration:none}
        a:hover{color:inherit}
        img{display:block;max-width:100%}
        button,input{font:inherit}
        button{cursor:pointer}
        :focus-visible{outline:3px solid rgba(242,140,69,.55);outline-offset:3px}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .site-header{
            position:sticky;top:0;z-index:20;background:rgba(247,250,247,.94);
            border-bottom:1px solid rgba(220,232,226,.9);backdrop-filter:blur(16px)
        }
        .nav-wrap{height:78px;display:flex;align-items:center;gap:30px}
        .brand{display:flex;align-items:center;gap:11px;min-width:265px}
        .brand-mark{
            width:40px;height:40px;border-radius:12px;background:var(--green);color:#fff;
            display:grid;place-items:center;font-size:20px;font-weight:800;
            box-shadow:0 7px 16px rgba(8,127,105,.24)
        }
        .brand-text{display:flex;flex-direction:column;line-height:1.2}
        .brand-text strong{font-size:15px;letter-spacing:.01em}
        .brand-text span{font-size:11px;color:var(--green);margin-top:4px;font-weight:700}
        .main-nav{display:flex;align-items:center;gap:7px;flex:1}
        .main-nav a{
            padding:10px 14px;border-radius:9px;color:#49605b;font-size:14px;
            transition:.22s ease
        }
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{
            color:var(--green-dark);background:var(--soft)
        }
        .main-nav a.active{font-weight:800}
        .nav-action,.btn{
            min-height:44px;display:inline-flex;align-items:center;justify-content:center;
            border-radius:10px;padding:0 20px;font-weight:800;font-size:14px;
            transition:transform .22s ease,background .22s ease,box-shadow .22s ease
        }
        .nav-action,.btn-primary{
            background:var(--orange);color:#fff;box-shadow:0 8px 18px rgba(242,140,69,.22)
        }
        .nav-action:hover,.btn-primary:hover{
            background:var(--orange-dark);color:#fff;transform:translateY(-2px)
        }
        .btn-secondary{border:1px solid #afd5c7;background:#fff;color:var(--green-dark)}
        .btn-secondary:hover{background:var(--soft);color:var(--green-dark);transform:translateY(-2px)}
        .menu-toggle{display:none;border:0;background:transparent;color:var(--green-dark);font-size:25px}
        .page-hero{
            position:relative;overflow:hidden;padding:82px 0 76px;
            background:linear-gradient(135deg,#e9f5ef 0%,#f7faf7 65%,#fff0e5 100%)
        }
        .page-hero:before,.page-hero:after{
            content:"";position:absolute;border-radius:50%;pointer-events:none
        }
        .page-hero:before{width:420px;height:420px;background:rgba(191,232,215,.38);right:-150px;top:-170px}
        .page-hero:after{width:240px;height:240px;background:rgba(242,140,69,.12);left:-110px;bottom:-110px}
        .hero-inner{position:relative;z-index:1;max-width:800px}
        .eyebrow,.section-kicker{
            color:var(--green);font-weight:800;font-size:13px;letter-spacing:.04em
        }
        .eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:17px}
        .eyebrow:before{content:"";width:24px;height:3px;border-radius:3px;background:var(--orange)}
        h1,h2,h3{margin:0;color:var(--ink);font-weight:850;letter-spacing:-.025em}
        h1{font-size:clamp(36px,5vw,58px);line-height:1.16;max-width:760px}
        h2{font-size:clamp(28px,3vw,38px);line-height:1.25}
        h3{font-size:20px;line-height:1.35}
        .hero-copy{margin:22px 0 28px;max-width:730px;color:#536761;font-size:17px}
        .hero-buttons{display:flex;gap:12px;flex-wrap:wrap}
        .hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
        .pill{
            border:1px solid #b9d9cc;border-radius:30px;padding:7px 13px;
            background:rgba(255,255,255,.7);color:var(--green-dark);font-size:13px;font-weight:700
        }
        .section{padding:86px 0}
        .section-head{
            display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:31px
        }
        .section-head p{max-width:470px;color:var(--muted);font-size:14px;margin:0}
        .intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:25px;align-items:stretch}
        .info-panel,.demo-panel,.notice-box,.faq-list{
            background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
            box-shadow:var(--small-shadow)
        }
        .info-panel{padding:34px}
        .info-panel p{color:var(--muted);margin:16px 0 0}
        .check-list{list-style:none;padding:0;margin:25px 0 0}
        .check-list li{
            display:flex;gap:12px;align-items:flex-start;padding:13px 0;border-top:1px solid var(--line);
            color:#405650;font-size:15px
        }
        .check-list li:before{
            content:"✓";flex:none;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;
            background:var(--soft);color:var(--green);font-weight:900
        }
        .demo-panel{padding:18px;background:#123630;color:#fff;position:relative;overflow:hidden}
        .demo-top{display:flex;justify-content:space-between;align-items:center;color:#bfe8d7;font-size:12px}
        .demo-window{
            margin-top:22px;min-height:270px;border-radius:12px;padding:19px;
            background:linear-gradient(145deg,#1b6b5b,#0a4037);border:1px solid rgba(191,232,215,.25)
        }
        .demo-window strong{display:block;font-size:24px;line-height:1.25;margin:15px 0 20px}
        .demo-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:9px}
        .demo-grid span{
            aspect-ratio:1;border-radius:9px;background:rgba(255,255,255,.12);
            border:1px solid rgba(255,255,255,.16);display:grid;place-items:center;color:#f9ad72;font-weight:800
        }
        .demo-caption{margin:19px 3px 2px;color:#b9d2ca;font-size:13px}
        .process{background:#edf4f0}
        .process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
        .process-item{position:relative;padding:26px 22px;background:#fff;border:1px solid var(--line);border-radius:16px}
        .process-number{
            display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;
            background:var(--green);color:#fff;font-weight:900;margin-bottom:18px
        }
        .process-item p{color:var(--muted);font-size:14px;margin:10px 0 0}
        .process-item:not(:last-child):after{
            content:"→";position:absolute;right:-14px;top:35px;color:var(--orange);font-size:22px;font-weight:900;z-index:2
        }
        .split-section{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:center}
        .feature-copy p{color:var(--muted);margin:17px 0 23px}
        .feature-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
        .feature-list div{padding:16px;border-left:3px solid var(--orange);background:#fff;border-radius:0 10px 10px 0}
        .feature-list strong{display:block;font-size:15px}
        .feature-list span{display:block;color:var(--muted);font-size:13px;margin-top:3px}
        .device-board{
            min-height:315px;padding:28px;border-radius:20px;background:#123630;color:#fff;
            display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden
        }
        .device-board:before{content:"";position:absolute;width:300px;height:300px;border:1px solid rgba(191,232,215,.22);border-radius:50%}
        .device-card{
            position:relative;width:min(100%,430px);padding:25px;border:1px solid rgba(191,232,215,.3);
            border-radius:14px;background:rgba(255,255,255,.08)
        }
        .device-card small{color:#bfe8d7}
        .device-card h3{color:#fff;margin:9px 0 17px}
        .bar{height:8px;border-radius:8px;background:rgba(255,255,255,.16);margin:10px 0}
        .bar i{display:block;height:100%;width:72%;border-radius:8px;background:var(--orange)}
        .tag{display:inline-block;background:var(--soft);color:var(--green);padding:4px 9px;border-radius:5px;font-size:11px;font-weight:800}
        .news-layout{display:grid;grid-template-columns:1fr .68fr;gap:22px}
        .news-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:8px 25px}
        .news-item{display:grid;grid-template-columns:90px 1fr auto;gap:18px;align-items:center;padding:20px 0;border-bottom:1px solid var(--line)}
        .news-item:last-child{border-bottom:0}
        .news-item time{color:#8a9a96;font-size:12px}
        .news-item h3{font-size:16px;margin:0 0 5px}
        .news-item p{margin:0;color:var(--muted);font-size:13px}
        .news-link{color:var(--green);font-size:20px}
        .notice-box{padding:27px;background:#fff4ec;border-color:#f4d5bd}
        .notice-box h3{color:#8d4c29}
        .notice-box p{color:#765c4d;font-size:14px;margin:12px 0 20px}
        .faq-list{padding:8px 25px}
        details{border-bottom:1px solid var(--line);padding:19px 0}
        details:last-child{border-bottom:0}
        summary{cursor:pointer;list-style:none;font-weight:800;padding-right:25px;position:relative}
        summary::-webkit-details-marker{display:none}
        summary:after{content:"+";position:absolute;right:0;color:var(--orange);font-size:22px;top:-4px}
        details[open] summary:after{content:"−"}
        details p{color:var(--muted);font-size:14px;margin:12px 0 2px;max-width:850px}
        .cta{
            background:var(--green);color:#fff;border-radius:22px;padding:45px 52px;
            display:flex;align-items:center;justify-content:space-between;gap:25px
        }
        .cta h2{color:#fff;font-size:31px}
        .cta p{color:#d9eee7;margin:10px 0 0;max-width:620px}
        .cta .btn{background:var(--orange);color:#fff;white-space:nowrap}
        .site-footer{background:#123630;color:#fff;padding:58px 0 25px}
        .footer-grid{display:grid;grid-template-columns:1.5fr .7fr .8fr;gap:55px}
        .footer-brand{display:flex;align-items:center;gap:11px}
        .footer-brand .brand-mark{background:var(--orange)}
        .footer-brand strong{font-size:15px}
        .footer-description{color:#b9d2ca;font-size:13px;max-width:370px;margin:20px 0 0}
        .footer-col{display:flex;flex-direction:column;gap:10px}
        .footer-col h3{color:#fff;font-size:15px;margin-bottom:8px}
        .footer-col a{color:#b9d2ca;font-size:13px;transition:.2s ease}
        .footer-col a:hover{color:#fff;padding-left:3px}
        .footer-bottom{
            display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(191,232,215,.18);
            margin-top:42px;padding-top:20px;color:#8cc8b5;font-size:12px
        }
        @media(max-width:1024px){
            .nav-wrap{gap:15px}.brand{min-width:235px}
            .main-nav a{padding:9px 8px}
            .split-section{gap:35px}.process-grid{grid-template-columns:repeat(2,1fr)}
            .process-item:not(:last-child):after{display:none}
        }
        @media(max-width:768px){
            .container{width:min(var(--container),calc(100% - 32px))}
            .nav-wrap{height:70px;justify-content:space-between}
            .brand{min-width:0}.brand-text strong{font-size:13px}
            .main-nav{
                display:none;position:absolute;top:70px;left:16px;right:16px;padding:12px;
                flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);
                border-radius:14px;box-shadow:var(--shadow)
            }
            .main-nav.open{display:flex}
            .main-nav a{padding:12px 14px}
            .menu-toggle{display:block}
            .nav-action{min-height:40px;padding:0 12px;font-size:12px}
            .page-hero{padding:63px 0 58px}
            .hero-copy{font-size:16px}
            .section{padding:62px 0}
            .section-head{display:block}.section-head p{margin-top:12px}
            .intro-grid,.split-section,.news-layout{grid-template-columns:1fr}
            .process-grid{grid-template-columns:1fr 1fr}
            .feature-list{grid-template-columns:1fr}
            .cta{padding:34px 25px;display:block}.cta .btn{margin-top:22px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
            .footer-grid>div:first-child{grid-column:1/-1}
            .footer-bottom{display:block}.footer-bottom span{display:block;margin-top:6px}
        }
        @media(max-width:520px){
            h1{font-size:34px}.hero-buttons .btn{width:100%}
            .process-grid{grid-template-columns:1fr}
            .news-panel{padding:5px 17px}.news-item{grid-template-columns:1fr auto;gap:5px 12px}
            .news-item time{grid-column:1/-1;order:2}.news-item h3{grid-column:1}
            .news-item p{grid-column:1/-1}
            .news-link{grid-column:2;grid-row:2}
            .footer-grid{grid-template-columns:1fr}
            .footer-grid>div:first-child{grid-column:auto}
            .device-board{padding:18px;min-height:270px}
        }

/* roulang page: category3 */
:root{
            --ink:#172927;
            --muted:#647572;
            --soft:#edf4f0;
            --paper:#f7faf7;
            --card:#ffffff;
            --line:#dce8e2;
            --green:#087f69;
            --green-dark:#07584c;
            --mint:#bfe8d7;
            --orange:#f28c45;
            --orange-dark:#d96b28;
            --shadow:0 18px 50px rgba(18,63,53,.10);
            --small-shadow:0 8px 24px rgba(18,63,53,.08);
            --radius:18px;
            --container:1200px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            background:var(--paper);
            color:var(--ink);
            font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;
            line-height:1.65;
            font-size:16px;
        }
        a{color:inherit;text-decoration:none}
        img{display:block;max-width:100%}
        button,input{font:inherit}
        button{cursor:pointer}
        h1,h2,h3,p{margin-top:0}
        h1,h2,h3{line-height:1.22}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .site-header{
            position:sticky;top:0;z-index:20;
            background:rgba(247,250,247,.94);
            border-bottom:1px solid rgba(220,232,226,.9);
            backdrop-filter:blur(16px);
        }
        .nav-wrap{height:78px;display:flex;align-items:center;gap:34px}
        .brand{display:flex;align-items:center;gap:11px;min-width:265px}
        .brand-mark{
            width:40px;height:40px;border-radius:12px;background:var(--green);
            color:#fff;display:grid;place-items:center;font-size:20px;font-weight:800;
            box-shadow:0 7px 16px rgba(8,127,105,.24)
        }
        .brand-text{display:flex;flex-direction:column;line-height:1.2}
        .brand-text strong{font-size:15px;letter-spacing:.01em}
        .brand-text span{font-size:11px;color:var(--green);margin-top:4px;font-weight:700}
        .main-nav{display:flex;align-items:center;gap:7px;flex:1}
        .main-nav a{
            padding:10px 14px;border-radius:9px;color:#49605b;font-size:14px;
            transition:.22s ease;
        }
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{
            color:var(--green-dark);background:var(--soft)
        }
        .main-nav a.active{font-weight:800}
        .nav-action,.btn{
            min-height:44px;display:inline-flex;align-items:center;justify-content:center;
            border-radius:10px;padding:0 20px;font-weight:800;font-size:14px;
            transition:transform .22s ease,background .22s ease,box-shadow .22s ease;
        }
        .nav-action,.btn-primary{
            background:var(--orange);color:#fff;box-shadow:0 8px 18px rgba(242,140,69,.22)
        }
        .nav-action:hover,.btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px);color:#fff}
        .btn-secondary{border:1px solid #afd5c7;background:#fff;color:var(--green-dark)}
        .btn-secondary:hover{background:var(--soft);transform:translateY(-2px)}
        .btn:focus,.nav-action:focus,.main-nav a:focus,.menu-toggle:focus,.faq-question:focus{
            outline:3px solid rgba(242,140,69,.35);outline-offset:3px
        }
        .menu-toggle{display:none;border:0;background:transparent;color:var(--green-dark);font-size:25px}
        .app-hero{
            position:relative;overflow:hidden;padding:82px 0 76px;
            background:linear-gradient(135deg,#e9f5ef 0%,#f7faf7 64%,#fff0e5 100%);
        }
        .app-hero:before,.app-hero:after{
            content:"";position:absolute;border-radius:50%;pointer-events:none
        }
        .app-hero:before{width:390px;height:390px;background:rgba(191,232,215,.38);right:-150px;top:-170px}
        .app-hero:after{width:210px;height:210px;background:rgba(242,140,69,.13);left:-110px;bottom:-100px}
        .hero-layout{
            position:relative;z-index:1;display:grid;grid-template-columns:1.04fr .96fr;
            gap:80px;align-items:center
        }
        .eyebrow{
            display:inline-flex;align-items:center;gap:8px;color:var(--green);
            font-weight:800;font-size:13px;margin-bottom:18px
        }
        .eyebrow:before{content:"";width:24px;height:3px;border-radius:3px;background:var(--orange)}
        h1{font-size:clamp(36px,5vw,58px);letter-spacing:-.035em;margin-bottom:20px;max-width:680px}
        .hero-copy{max-width:610px;color:#536761;font-size:17px;margin-bottom:28px}
        .hero-buttons{display:flex;gap:12px;flex-wrap:wrap}
        .hero-note{display:flex;gap:18px;flex-wrap:wrap;margin-top:25px;color:var(--muted);font-size:13px}
        .hero-note span{display:flex;align-items:center;gap:7px}
        .hero-note i{width:7px;height:7px;border-radius:50%;background:var(--green);display:inline-block}
        .device-area{min-height:390px;display:flex;justify-content:center;align-items:center;position:relative}
        .phone{
            width:220px;height:410px;border:9px solid #172927;border-radius:34px;
            background:#103e37;box-shadow:0 24px 44px rgba(18,63,53,.24);
            padding:11px;position:relative;z-index:2
        }
        .phone:before{
            content:"";position:absolute;top:8px;left:50%;transform:translateX(-50%);
            width:66px;height:7px;border-radius:8px;background:#172927
        }
        .phone-screen{
            height:100%;border-radius:21px;overflow:hidden;
            background:linear-gradient(160deg,#e7f6ee,#b8dfcc 55%,#f8b276);
            padding:27px 12px 12px
        }
        .phone-top{display:flex;justify-content:space-between;color:var(--green-dark);font-size:10px;font-weight:800}
        .screen-logo{margin:25px 0 16px;padding:14px 10px;border-radius:13px;background:#126d5d;color:#fff}
        .screen-logo small{display:block;color:#bfe8d7;font-size:9px}
        .screen-logo strong{display:block;font-size:18px;margin-top:4px}
        .screen-tiles{display:grid;grid-template-columns:repeat(2,1fr);gap:7px}
        .screen-tile{height:70px;border-radius:10px;background:rgba(255,255,255,.72);border:1px solid rgba(8,127,105,.15);padding:8px}
        .screen-tile b{display:block;width:25px;height:25px;border-radius:8px;background:var(--orange);margin-bottom:6px}
        .screen-tile span{font-size:9px;color:var(--green-dark);font-weight:700}
        .app-badge{
            position:absolute;right:4%;top:12%;background:#fff;border:1px solid var(--line);
            border-radius:14px;padding:14px 17px;box-shadow:var(--small-shadow);z-index:3
        }
        .app-badge strong{display:block;color:var(--green-dark);font-size:14px}
        .app-badge small{font-size:11px;color:var(--muted)}
        .app-orbit{
            position:absolute;width:310px;height:310px;border:1px dashed rgba(8,127,105,.35);
            border-radius:50%
        }
        .section{padding:86px 0}
        .section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:32px}
        .section-kicker{color:var(--orange-dark);font-size:12px;font-weight:900;letter-spacing:.12em}
        .section-head h2{font-size:34px;margin:8px 0 0}
        .section-head p{max-width:460px;color:var(--muted);font-size:14px;margin-bottom:0}
        .download-panel{
            display:grid;grid-template-columns:.95fr 1.05fr;gap:46px;align-items:stretch
        }
        .download-card{
            background:#fff;border:1px solid var(--line);border-radius:var(--radius);
            box-shadow:var(--small-shadow);padding:30px
        }
        .download-card h3{font-size:23px;margin-bottom:12px}
        .download-card p{color:var(--muted);font-size:14px}
        .info-list{list-style:none;padding:0;margin:24px 0 0}
        .info-list li{
            display:flex;justify-content:space-between;gap:20px;padding:13px 0;
            border-bottom:1px solid var(--line);font-size:14px
        }
        .info-list li:last-child{border-bottom:0}
        .info-list span{color:var(--muted)}
        .info-list b{color:var(--green-dark);font-weight:800;text-align:right}
        .qr-layout{
            background:#123630;border-radius:var(--radius);color:#fff;padding:32px;
            display:flex;align-items:center;gap:30px;min-height:280px
        }
        .qr-box{
            width:146px;height:146px;flex:0 0 146px;background:#fff;border-radius:10px;
            padding:12px;display:grid;grid-template-columns:repeat(7,1fr);gap:3px
        }
        .qr-box i{background:#123630;display:block;min-width:0}
        .qr-box i:nth-child(3n),.qr-box i:nth-child(5n){background:var(--orange)}
        .qr-copy h3{font-size:23px;margin-bottom:10px}
        .qr-copy p{color:#b9d2ca;font-size:14px;margin-bottom:18px}
        .qr-copy small{color:#bfe8d7;font-size:12px}
        .steps-section{background:#edf4f0}
        .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .step{
            background:#fff;border:1px solid var(--line);border-radius:16px;padding:25px;
            position:relative;min-height:200px;transition:.25s ease
        }
        .step:hover{transform:translateY(-4px);box-shadow:var(--small-shadow);border-color:#abd7c7}
        .step-number{
            width:37px;height:37px;border-radius:11px;background:var(--green);color:#fff;
            display:grid;place-items:center;font-weight:900;margin-bottom:22px
        }
        .step h3{font-size:19px;margin-bottom:9px}
        .step p{font-size:14px;color:var(--muted);margin-bottom:0}
        .compatibility{
            display:grid;grid-template-columns:1fr 1fr;gap:18px
        }
        .compat-card{border:1px solid var(--line);background:#fff;border-radius:16px;padding:25px}
        .compat-card h3{font-size:20px;margin-bottom:10px}
        .compat-card p{font-size:14px;color:var(--muted);margin-bottom:15px}
        .tag-row{display:flex;flex-wrap:wrap;gap:8px}
        .tag{
            display:inline-block;background:var(--soft);color:var(--green);
            padding:5px 10px;border-radius:6px;font-size:12px;font-weight:800
        }
        .notice{
            margin-top:22px;padding:16px 18px;background:#fff6ee;border-left:4px solid var(--orange);
            border-radius:9px;color:#795033;font-size:13px
        }
        .faq-wrap{max-width:850px;margin:0 auto}
        .faq-item{border-bottom:1px solid var(--line);background:#fff}
        .faq-question{
            width:100%;border:0;background:transparent;text-align:left;padding:21px 4px;
            display:flex;justify-content:space-between;gap:20px;color:var(--ink);font-weight:800
        }
        .faq-question span:last-child{color:var(--orange);font-size:22px;line-height:1}
        .faq-answer{display:none;color:var(--muted);font-size:14px;padding:0 35px 21px 4px}
        .faq-item.open .faq-answer{display:block}
        .faq-item.open .faq-question span:last-child{transform:rotate(45deg)}
        .cta{
            background:#123630;color:#fff;border-radius:22px;padding:48px 55px;
            display:flex;justify-content:space-between;align-items:center;gap:30px
        }
        .cta h2{font-size:30px;margin-bottom:10px}
        .cta p{color:#b9d2ca;margin:0;font-size:14px}
        .site-footer{background:#102c28;color:#fff;padding:58px 0 24px}
        .footer-grid{display:grid;grid-template-columns:1.5fr .7fr .8fr;gap:60px}
        .footer-brand{display:flex;align-items:center;gap:11px}
        .footer-brand .brand-mark{background:var(--orange)}
        .footer-brand strong{font-size:15px}
        .footer-brand small{font-size:11px}
        .footer-description{max-width:390px;color:#9ab6ae;font-size:13px;margin:20px 0 0}
        .footer-col{display:flex;flex-direction:column;gap:10px}
        .footer-col h3{font-size:14px;color:#fff;margin-bottom:8px}
        .footer-col a{color:#9ab6ae;font-size:13px;transition:.2s ease}
        .footer-col a:hover{color:#bfe8d7}
        .footer-bottom{
            display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(191,232,215,.16);
            margin-top:42px;padding-top:20px;color:#78968e;font-size:12px
        }
        @media(max-width:1024px){
            .nav-wrap{gap:18px}.brand{min-width:230px}
            .main-nav a{padding:9px 9px}
            .hero-layout{gap:38px}.download-panel{gap:22px}
        }
        @media(max-width:768px){
            .container{width:min(var(--container),calc(100% - 32px))}
            .nav-wrap{height:70px}.menu-toggle{display:block;margin-left:auto}
            .main-nav{
                display:none;position:absolute;left:16px;right:16px;top:68px;padding:10px;
                background:#fff;border:1px solid var(--line);border-radius:14px;
                box-shadow:var(--shadow);flex-direction:column;align-items:stretch
            }
            .main-nav.open{display:flex}
            .main-nav a{padding:13px 15px}
            .nav-action{display:none}
            .brand{min-width:0}.brand-text strong{font-size:13px}
            .app-hero{padding:62px 0 55px}
            .hero-layout,.download-panel,.compatibility{grid-template-columns:1fr}
            .hero-copy{font-size:15px}
            .device-area{min-height:360px;margin-top:10px}
            .section{padding:62px 0}
            .section-head{display:block}.section-head p{margin-top:14px}
            .steps{grid-template-columns:1fr}
            .qr-layout{padding:25px;gap:20px}
            .cta{display:block;padding:34px 25px}.cta .btn{margin-top:22px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
            .footer-grid>div:first-child{grid-column:1/-1}
            .footer-bottom{display:block}.footer-bottom span{display:block;margin-top:7px}
        }
        @media(max-width:520px){
            h1{font-size:35px}.section-head h2{font-size:28px}
            .hero-buttons .btn{width:100%}
            .phone{width:195px;height:365px}
            .app-orbit{width:270px;height:270px}
            .app-badge{right:0;top:7%}
            .qr-layout{display:block;text-align:center}
            .qr-box{margin:0 auto 22px}
            .footer-grid{grid-template-columns:1fr}
            .footer-grid>div:first-child{grid-column:auto}
        }

/* 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}