/* roulang page: index */
:root{
            --ink:#172923;
            --muted:#667670;
            --soft:#f3f7f4;
            --paper:#fbfdfb;
            --line:#dce8e1;
            --brand:#087f68;
            --brand-dark:#075b4c;
            --mint:#d8f1e8;
            --amber:#e8a83e;
            --amber-soft:#fff4dc;
            --white:#fff;
            --radius:16px;
            --shadow:0 16px 40px rgba(20,61,48,.08);
            --shadow-sm:0 7px 20px rgba(20,61,48,.07);
        }
        *{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth}
        body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--paper);color:var(--ink);font-size:16px;line-height:1.8}
        a{color:inherit;text-decoration:none}
        img{max-width:100%;display:block}
        button,input,select,textarea{font:inherit}
        button{cursor:pointer}
        .container{width:min(1180px,calc(100% - 48px));margin:0 auto}
        .site-header{position:sticky;top:0;z-index:20;background:rgba(251,253,251,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
        .nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between;gap:30px}
        .brand{display:flex;align-items:center;gap:11px;min-width:245px}
        .brand-mark{width:38px;height:38px;border-radius:12px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:18px;font-weight:800;box-shadow:0 6px 14px rgba(8,127,104,.22)}
        .brand-text{font-weight:800;letter-spacing:-.3px;color:var(--ink);line-height:1.25}
        .brand-text small{display:block;color:var(--brand);font-size:11px;letter-spacing:1.2px;margin-top:2px}
        .nav{display:flex;align-items:center;gap:5px}
        .nav a{padding:9px 13px;color:var(--muted);font-size:14px;border-radius:9px;transition:.2s ease}
        .nav a:hover,.nav a.active{color:var(--brand-dark);background:var(--mint);font-weight:700}
        .menu-toggle{display:none;background:none;border:0;color:var(--ink);font-size:25px}
        .hero{padding:82px 0 76px;background:linear-gradient(135deg,#f5fbf7 0%,#edf7f1 58%,#fff8e9 100%);border-bottom:1px solid var(--line)}
        .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:70px}
        .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:800;font-size:13px;letter-spacing:.8px}
        .eyebrow:before,.section-kicker:before{content:"";width:22px;height:3px;background:var(--amber);border-radius:4px}
        h1{font-size:clamp(36px,5vw,58px);line-height:1.18;letter-spacing:-2px;margin:18px 0 22px;max-width:680px}
        .hero-copy{font-size:18px;color:var(--muted);max-width:620px}
        .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:31px}
        .btn{min-height:46px;padding:10px 20px;border-radius:10px;border:1px solid transparent;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:750;transition:.2s ease}
        .btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(8,127,104,.2)}
        .btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px)}
        .btn-secondary{background:#fff;color:var(--brand-dark);border-color:var(--line)}
        .btn-secondary:hover{border-color:var(--brand);background:var(--soft);transform:translateY(-2px)}
        .hero-notes{display:flex;gap:20px;margin-top:29px;color:var(--muted);font-size:13px;flex-wrap:wrap}
        .hero-notes span{display:flex;gap:7px;align-items:center}.hero-notes b{color:var(--brand)}
        .screen-stage{position:relative;min-height:370px;display:flex;align-items:center;justify-content:center}
        .screen-back{position:absolute;width:88%;height:270px;border:1px solid #bfddd0;border-radius:22px;background:#e4f4ec;transform:rotate(5deg);right:0;top:50px}
        .screen{position:relative;width:min(420px,100%);background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:var(--shadow);z-index:1}
        .screen-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:14px}
        .screen-title{font-weight:800}.live{font-size:11px;color:var(--brand);background:var(--mint);padding:3px 8px;border-radius:20px}
        .screen-body{padding:24px 4px 8px;display:grid;grid-template-columns:1.1fr .9fr;gap:13px}
        .screen-panel{background:var(--soft);border-radius:13px;padding:16px;min-height:142px}
        .screen-panel strong{display:block;font-size:25px;color:var(--brand);margin:10px 0 2px}
        .screen-panel p{font-size:12px;color:var(--muted)}
        .screen-list{display:grid;gap:9px}.screen-list i{display:block;height:10px;background:#cce5da;border-radius:10px}.screen-list i:nth-child(2){width:75%;background:#f1d296}.screen-list i:nth-child(3){width:58%}
        .section{padding:92px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:32px}
        h2{font-size:32px;line-height:1.3;letter-spacing:-.8px;margin-top:9px}
        .section-intro{color:var(--muted);max-width:570px}
        .quick-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
        .quick-item{padding:20px 17px;background:#fff;border:1px solid var(--line);border-radius:13px;transition:.2s}
        .quick-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm);border-color:#a8d4c4}
        .quick-icon{font-size:22px;margin-bottom:13px}.quick-item strong{display:block;font-size:15px}.quick-item span{display:block;color:var(--muted);font-size:12px;line-height:1.5;margin-top:4px}
        .split{display:grid;grid-template-columns:.85fr 1.15fr;gap:54px;align-items:center}
        .workbench{background:var(--ink);border-radius:20px;padding:24px;color:#fff;box-shadow:var(--shadow);overflow:hidden}
        .workbench-bar{display:flex;gap:7px;margin-bottom:24px}.workbench-bar i{width:9px;height:9px;border-radius:50%;background:#6c8b80}.workbench-bar i:first-child{background:#e8a83e}
        .workbench-content{display:grid;grid-template-columns:145px 1fr;gap:18px}
        .work-nav{border-right:1px solid #365047;padding-right:15px}.work-nav span{display:block;padding:8px 0;color:#a8c0b5;font-size:12px}.work-nav span:first-child{color:#fff;border-bottom:2px solid var(--amber)}
        .work-main{min-height:170px}.work-main h3{font-size:21px;margin-bottom:12px}.work-lines{display:grid;gap:10px}.work-lines b{height:10px;width:85%;background:#477267;border-radius:7px;display:block}.work-lines b:nth-child(2){width:64%;background:#298c74}.work-lines b:nth-child(3){width:73%}
        .feature-list{display:grid;gap:19px;margin-top:28px}.feature{display:flex;gap:14px}.feature-no{flex:0 0 32px;height:32px;border-radius:9px;background:var(--mint);color:var(--brand);display:grid;place-items:center;font-weight:800}.feature h3{font-size:17px;line-height:1.3}.feature p{font-size:14px;color:var(--muted);margin-top:3px}
        .download-band{background:var(--soft);border:1px solid var(--line);border-radius:22px;padding:35px;display:grid;grid-template-columns:1fr 1fr;gap:35px;align-items:center}
        .phone-row{display:flex;justify-content:center;gap:16px}.phone{width:130px;height:230px;border:7px solid var(--ink);border-radius:24px;background:#fff;padding:22px 10px 10px;box-shadow:var(--shadow-sm)}.phone small{display:block;color:var(--brand);font-weight:800;margin-bottom:15px}.phone em{display:block;height:9px;background:#d8eee5;border-radius:8px;margin:10px 0}.phone em:nth-child(3){width:70%;background:#f0d79f}.phone.second{margin-top:28px;background:#17372d;color:#fff}.phone.second small{color:#c2eadc}.download-meta{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:22px}.meta-box{background:#fff;border:1px solid var(--line);padding:13px;border-radius:11px}.meta-box b{display:block;color:var(--brand);font-size:13px}.meta-box span{font-size:12px;color:var(--muted)}
        .steps{display:grid;grid-template-columns:repeat(4,1fr);position:relative;gap:20px}.steps:before{content:"";position:absolute;top:22px;left:8%;right:8%;height:1px;background:var(--line)}.step{position:relative;z-index:1}.step-number{width:45px;height:45px;border-radius:50%;background:var(--amber);color:#fff;display:grid;place-items:center;font-weight:800;margin-bottom:15px;border:6px solid var(--paper)}.step h3{font-size:17px}.step p{color:var(--muted);font-size:14px;margin-top:4px}
        .directory{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.dir-card{padding:23px;border:1px solid var(--line);border-radius:14px;background:#fff}.dir-card .tag{margin-bottom:18px}.dir-card h3{font-size:18px}.dir-card p{font-size:14px;color:var(--muted);margin:6px 0 17px}.dir-link{font-size:13px;color:var(--brand);font-weight:750}
        .device-area{background:#edf6f1;padding:70px 0}.device-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.device{background:#fff;border-radius:14px;padding:21px;border:1px solid var(--line)}.device-symbol{font-size:27px;color:var(--brand)}.device h3{font-size:17px;margin:9px 0 3px}.device p{font-size:13px;color:var(--muted)}.compat{display:inline-block;margin-top:15px;background:var(--mint);color:var(--brand-dark);border-radius:30px;padding:3px 9px;font-size:11px}
        .tag{display:inline-block;background:var(--amber-soft);color:#996b18;border-radius:30px;padding:3px 9px;font-size:11px;font-weight:750}.news-section{background:#fff}.news-list{border-top:1px solid var(--line)}.news-item{display:grid;grid-template-columns:110px 1fr 120px;gap:22px;align-items:center;padding:21px 0;border-bottom:1px solid var(--line);transition:.2s}.news-item:hover{padding-left:8px;background:#fbfdfb}.news-date{font-size:13px;color:var(--muted)}.news-date b{display:block;color:var(--brand);font-size:22px;line-height:1.2}.news-item h3{font-size:18px;line-height:1.4}.news-item p{color:var(--muted);font-size:14px;margin-top:3px}.news-attr{text-align:right;color:var(--brand);font-size:13px;font-weight:700}
        .timeline{border-left:2px solid #b8d9ca;margin:12px 0 0 12px;padding-left:28px;display:grid;gap:24px}.timeline-item{position:relative}.timeline-item:before{content:"";position:absolute;width:10px;height:10px;border-radius:50%;background:var(--amber);left:-34px;top:10px;box-shadow:0 0 0 5px var(--paper)}.timeline-item strong{font-size:17px}.timeline-item span{font-size:13px;color:var(--muted);margin-left:12px}.timeline-item p{font-size:14px;color:var(--muted)}
        .guide-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:25px}.guide-main{display:grid;grid-template-columns:repeat(2,1fr);gap:13px}.guide-card{padding:22px;border:1px solid var(--line);border-radius:13px;background:#fff}.guide-card b{font-size:28px;color:#b5d7c9}.guide-card h3{font-size:17px;margin-top:7px}.guide-card p{color:var(--muted);font-size:13px;margin-top:4px}.notice{padding:27px;border-radius:15px;background:var(--amber-soft);border:1px solid #f0d79f}.notice h3{font-size:19px;color:#765215}.notice p{font-size:14px;color:#765f31;margin-top:7px}
        .faq{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq details{border:1px solid var(--line);border-radius:12px;background:#fff;padding:0 18px}.faq summary{list-style:none;cursor:pointer;padding:18px 28px 18px 0;font-weight:750;position:relative}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";position:absolute;right:0;color:var(--brand);font-size:22px;top:14px}.faq details[open] summary:after{content:"−"}.faq details p{color:var(--muted);font-size:14px;padding:0 0 17px}
        .route{display:flex;align-items:center;justify-content:center;gap:0;flex-wrap:wrap}.route-item{padding:15px 21px;border:1px solid var(--line);background:#fff;border-radius:12px;text-align:center}.route-item b{display:block;color:var(--brand)}.route-item span{font-size:12px;color:var(--muted)}.route-arrow{padding:0 12px;color:var(--amber);font-size:24px}
        .feedback{display:grid;grid-template-columns:.8fr 1.2fr;gap:35px;align-items:start}.feedback-copy p{color:var(--muted);margin-top:10px}.form-box{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow-sm)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.field{display:grid;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 var(--line);border-radius:9px;padding:10px 12px;background:#fbfdfb;color:var(--ink);outline:none}.field textarea{min-height:90px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(8,127,104,.1)}.form-tip{font-size:12px;color:var(--muted);margin-top:11px}
        .bottom-cta{padding:35px 40px;background:var(--brand);color:#fff;border-radius:18px;display:flex;align-items:center;justify-content:space-between;gap:25px}.bottom-cta h2{margin:0;font-size:27px}.bottom-cta p{color:#c5e8dc;margin-top:4px}.bottom-cta .btn{background:#fff;color:var(--brand-dark)}
        .site-footer{background:#12382e;color:#d7e9e1;padding:58px 0 24px}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:40px;padding-bottom:38px;border-bottom:1px solid #31594d}.footer-brand{font-weight:800;font-size:18px;color:#fff}.footer-brand p{font-size:13px;color:#a7c3b8;font-weight:400;margin-top:12px;max-width:270px}.footer-col h3{color:#fff;font-size:14px;margin-bottom:12px}.footer-col a{display:block;color:#a7c3b8;font-size:13px;margin:5px 0;transition:.2s}.footer-col a:hover{color:#fff;transform:translateX(2px)}.copyright{display:flex;justify-content:space-between;gap:20px;padding-top:20px;color:#8eafa2;font-size:12px}
        @media(max-width:1024px){.nav{gap:0}.nav a{padding:8px 8px}.hero-grid{gap:35px}.quick-grid{grid-template-columns:repeat(3,1fr)}.device-grid{grid-template-columns:repeat(2,1fr)}}
        @media(max-width:768px){.container{width:min(100% - 32px,620px)}.nav-wrap{height:68px}.brand{min-width:0}.brand-text{font-size:14px}.menu-toggle{display:block}.nav{display:none;position:absolute;left:16px;right:16px;top:74px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:13px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav.open{display:flex}.nav a{padding:11px 13px}.hero{padding:58px 0 52px}.hero-grid,.split,.download-band,.guide-layout,.feedback{grid-template-columns:1fr}.screen-stage{min-height:320px}.section{padding:64px 0}.section-head{display:block}.section-intro{margin-top:12px}.steps{grid-template-columns:1fr 1fr;gap:25px}.steps:before{display:none}.directory{grid-template-columns:1fr 1fr}.faq{grid-template-columns:1fr}.bottom-cta{display:block;padding:28px}.bottom-cta .btn{margin-top:20px}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:8px}}
        @media(max-width:520px){h1{font-size:35px;letter-spacing:-1.2px}.hero-copy{font-size:16px}.actions .btn{width:100%}.quick-grid,.directory,.device-grid,.guide-main{grid-template-columns:1fr}.phone-row{transform:scale(.9);margin-left:-15px;margin-right:-15px}.screen-body{grid-template-columns:1fr}.workbench-content{grid-template-columns:1fr}.work-nav{border-right:0;border-bottom:1px solid #365047;padding:0 0 8px;display:flex;gap:14px}.news-item{grid-template-columns:72px 1fr}.news-attr{display:none}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.route{display:block}.route-item{margin:8px 0}.route-arrow{display:block;text-align:center;line-height:1}.footer-grid{grid-template-columns:1fr;gap:25px}.footer-col{display:none}}

/* roulang page: article */
:root{
            --ink:#172923;
            --muted:#667670;
            --soft:#f3f7f4;
            --paper:#fbfdfb;
            --line:#dce8e1;
            --brand:#087f68;
            --brand-dark:#075b4c;
            --mint:#d8f1e8;
            --amber:#e8a83e;
            --amber-soft:#fff4dc;
            --white:#fff;
            --radius:16px;
            --shadow:0 16px 40px rgba(20,61,48,.08);
            --shadow-sm:0 7px 20px rgba(20,61,48,.07);
        }

        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
            background:var(--paper);
            color:var(--ink);
            font-size:16px;
            line-height:1.8;
        }
        a{color:inherit;text-decoration:none}
        a:focus-visible,button:focus-visible{outline:3px solid rgba(232,168,62,.65);outline-offset:3px}
        img{max-width:100%;height:auto;display:block}
        button,input,select,textarea{font:inherit}
        button{cursor:pointer}
        .container{width:min(1180px,calc(100% - 48px));margin:0 auto}

        .site-header{
            position:sticky;
            top:0;
            z-index:20;
            background:rgba(251,253,251,.95);
            border-bottom:1px solid var(--line);
            backdrop-filter:blur(12px);
        }
        .nav-wrap{
            min-height:78px;
            display:flex;
            align-items:center;
            justify-content:space-between;
            gap:30px;
        }
        .brand{display:flex;align-items:center;gap:11px;min-width:245px}
        .brand-mark{
            width:38px;height:38px;border-radius:12px;
            background:var(--brand);color:#fff;display:grid;place-items:center;
            font-size:18px;font-weight:800;
            box-shadow:0 6px 14px rgba(8,127,104,.22);
        }
        .brand-text{font-weight:800;letter-spacing:-.3px;color:var(--ink);line-height:1.25}
        .brand-text small{
            display:block;color:var(--brand);font-size:11px;
            letter-spacing:1.2px;margin-top:2px;
        }
        .nav{display:flex;align-items:center;gap:5px}
        .nav a{
            padding:9px 13px;color:var(--muted);font-size:14px;
            border-radius:9px;transition:.2s ease;
        }
        .nav a:hover,.nav a.active{
            color:var(--brand-dark);background:var(--mint);font-weight:700;
        }
        .menu-toggle{
            display:none;background:none;border:0;color:var(--ink);
            font-size:25px;padding:6px 9px;border-radius:8px;
        }
        .menu-toggle:hover{background:var(--mint)}

        .article-hero{
            padding:58px 0 54px;
            background:linear-gradient(135deg,#f5fbf7 0%,#edf7f1 62%,#fff8e9 100%);
            border-bottom:1px solid var(--line);
        }
        .breadcrumbs{
            display:flex;align-items:center;gap:9px;flex-wrap:wrap;
            color:var(--muted);font-size:13px;margin-bottom:25px;
        }
        .breadcrumbs a{color:var(--brand);font-weight:700}
        .breadcrumbs .divider{color:#a6b9b0}
        .article-heading{max-width:900px}
        .eyebrow,.section-kicker{
            display:inline-flex;align-items:center;gap:8px;
            color:var(--brand);font-weight:800;font-size:13px;letter-spacing:.8px;
        }
        .eyebrow:before,.section-kicker:before{
            content:"";width:22px;height:3px;background:var(--amber);border-radius:4px;
        }
        h1,h2,h3,p{margin-top:0}
        h1{
            margin:13px 0 18px;
            font-size:clamp(32px,4.2vw,50px);
            line-height:1.22;letter-spacing:-1.5px;font-weight:800;
        }
        .article-lead{
            max-width:820px;color:var(--muted);font-size:18px;
            line-height:1.85;margin-bottom:25px;
        }
        .article-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:13px}
        .tag{
            display:inline-block;background:var(--amber-soft);color:#996b18;
            border-radius:30px;padding:3px 10px;font-size:11px;font-weight:750;
        }
        .meta-dot{width:4px;height:4px;border-radius:50%;background:#a8b9b1}

        .article-layout{
            display:grid;
            grid-template-columns:minmax(0,790px) 280px;
            gap:62px;
            align-items:start;
            padding:74px 0 92px;
        }
        .article-content{
            min-width:0;
            color:#33463f;
            font-size:17px;
            line-height:1.95;
        }
        .article-content h2{
            color:var(--ink);font-size:30px;line-height:1.35;
            margin:42px 0 17px;padding-top:5px;
            letter-spacing:-.5px;
        }
        .article-content h3{
            color:var(--ink);font-size:21px;line-height:1.45;
            margin:30px 0 11px;
        }
        .article-content p{margin-bottom:20px}
        .article-content ul,.article-content ol{padding-left:26px;margin:15px 0 25px}
        .article-content li{padding-left:5px;margin:7px 0}
        .article-content blockquote{
            margin:28px 0;padding:19px 23px;
            border-left:4px solid var(--brand);
            background:var(--soft);color:var(--brand-dark);
            border-radius:0 12px 12px 0;
        }
        .article-content table{
            width:100%;border-collapse:collapse;margin:25px 0;
            background:#fff;border:1px solid var(--line);
        }
        .article-content th,.article-content td{
            text-align:left;padding:12px 15px;border-bottom:1px solid var(--line);
        }
        .article-content th{background:var(--soft);color:var(--ink);font-weight:750}
        .article-content img{border-radius:14px;margin:25px 0}
        .article-content a{color:var(--brand);font-weight:700;border-bottom:1px solid #abd8c9}
        .article-content a:hover{color:var(--brand-dark)}

        .article-sidebar{
            position:sticky;top:105px;display:grid;gap:18px;
        }
        .side-card{
            background:#fff;border:1px solid var(--line);
            border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);
        }
        .side-card h2{
            font-size:17px;margin:0 0 14px;color:var(--ink);
        }
        .side-card p{font-size:13px;color:var(--muted);line-height:1.7;margin-bottom:0}
        .toc{
            margin:0;padding:0;list-style:none;border-left:2px solid var(--line);
        }
        .toc li{margin:0}
        .toc a{
            display:block;padding:7px 0 7px 14px;
            color:var(--muted);font-size:13px;line-height:1.5;
            transition:.2s;border-left:2px solid transparent;margin-left:-2px;
        }
        .toc a:hover,.toc a.active{color:var(--brand);border-color:var(--brand);font-weight:700}
        .notice{
            display:flex;gap:15px;align-items:flex-start;
            background:var(--mint);border:1px solid #b8dfd0;
            border-radius:var(--radius);padding:22px 24px;
            margin:35px 0 42px;color:var(--brand-dark);
        }
        .notice-icon{
            flex:0 0 34px;width:34px;height:34px;border-radius:10px;
            display:grid;place-items:center;background:#fff;color:var(--brand);font-weight:800;
        }
        .notice strong{display:block;margin-bottom:4px}
        .notice p{margin:0;font-size:14px;line-height:1.7}

        .article-bottom{
            border-top:1px solid var(--line);padding-top:28px;
            display:flex;justify-content:space-between;gap:18px;align-items:center;
        }
        .article-bottom p{color:var(--muted);font-size:14px;margin:0}
        .btn{
            min-height:46px;padding:10px 20px;border-radius:10px;
            border:1px solid transparent;display:inline-flex;
            align-items:center;justify-content:center;gap:8px;
            font-weight:750;transition:.2s ease;
        }
        .btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(8,127,104,.2)}
        .btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);color:#fff}
        .btn-secondary{background:#fff;color:var(--brand-dark);border-color:var(--line)}
        .btn-secondary:hover{border-color:var(--brand);background:var(--soft);transform:translateY(-2px)}

        .reading-strip{background:var(--soft);border-top:1px solid var(--line);padding:42px 0}
        .strip-inner{display:flex;justify-content:space-between;align-items:center;gap:30px}
        .strip-inner h2{font-size:24px;margin:0 0 5px}
        .strip-inner p{color:var(--muted);margin:0;font-size:14px}

        .site-footer{background:#173c31;color:#dcebe5;padding:56px 0 24px}
        .footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:38px}
        .footer-brand{font-size:18px;font-weight:800;color:#fff;line-height:1.5}
        .footer-brand p{
            max-width:300px;color:#a9c2b8;font-size:13px;
            font-weight:400;line-height:1.8;margin:12px 0 0;
        }
        .footer-col{display:flex;flex-direction:column;gap:8px}
        .footer-col h3{font-size:14px;color:#fff;margin:0 0 9px}
        .footer-col a{color:#a9c2b8;font-size:13px;transition:.2s}
        .footer-col a:hover{color:#fff;padding-left:3px}
        .copyright{
            display:flex;justify-content:space-between;gap:20px;
            border-top:1px solid rgba(220,235,229,.16);
            margin-top:40px;padding-top:18px;color:#91aea2;font-size:12px;
        }

        @media (max-width:1024px){
            .nav-wrap{gap:15px}
            .brand{min-width:220px}
            .nav a{padding:8px 9px;font-size:13px}
            .article-layout{grid-template-columns:minmax(0,1fr) 240px;gap:35px}
        }
        @media (max-width:768px){
            .container{width:min(100% - 36px,620px)}
            .nav-wrap{min-height:68px}
            .menu-toggle{display:block}
            .nav{
                display:none;position:absolute;left:18px;right:18px;top:68px;
                padding:10px;background:#fff;border:1px solid var(--line);
                border-radius:14px;box-shadow:var(--shadow);
                flex-direction:column;align-items:stretch;
            }
            .nav.open{display:flex}
            .nav a{padding:12px 14px}
            .article-hero{padding:42px 0 40px}
            .article-layout{display:block;padding:50px 0 62px}
            .article-sidebar{position:static;margin-top:42px}
            .article-content{font-size:16px}
            .article-content h2{font-size:25px;margin-top:35px}
            .article-bottom,.strip-inner{align-items:stretch;flex-direction:column}
            .footer-grid{grid-template-columns:repeat(2,1fr);gap:30px}
            .footer-brand{grid-column:1/-1}
        }
        @media (max-width:520px){
            .container{width:calc(100% - 32px)}
            h1{font-size:32px;letter-spacing:-.8px}
            .article-lead{font-size:16px}
            .article-content table{display:block;overflow-x:auto;white-space:nowrap}
            .notice{padding:18px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:24px 16px}
            .copyright{display:block;line-height:2}
            .copyright span{display:block}
            .copyright span+span{margin-top:5px}
        }

/* roulang page: category1 */
:root{
            --ink:#172923;
            --muted:#667670;
            --soft:#f3f7f4;
            --paper:#fbfdfb;
            --line:#dce8e1;
            --brand:#087f68;
            --brand-dark:#075b4c;
            --mint:#d8f1e8;
            --amber:#e8a83e;
            --amber-soft:#fff4dc;
            --white:#fff;
            --radius:16px;
            --shadow:0 16px 40px rgba(20,61,48,.08);
            --shadow-sm:0 7px 20px rgba(20,61,48,.07);
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--paper);color:var(--ink);font-size:16px;line-height:1.8}
        a{color:inherit;text-decoration:none}
        img{max-width:100%;display:block}
        button,input,select,textarea{font:inherit}
        button{cursor:pointer}
        h1,h2,h3,p{margin:0}
        h1{font-size:clamp(34px,4vw,50px);line-height:1.22;letter-spacing:-1.5px}
        h2{font-size:32px;line-height:1.3;letter-spacing:-.6px}
        h3{line-height:1.4}
        .container{width:min(1180px,calc(100% - 48px));margin:0 auto}
        .site-header{position:sticky;top:0;z-index:20;background:rgba(251,253,251,.95);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
        .nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between;gap:30px}
        .brand{display:flex;align-items:center;gap:11px;min-width:245px}
        .brand-mark{width:38px;height:38px;border-radius:12px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:18px;font-weight:800;box-shadow:0 6px 14px rgba(8,127,104,.22)}
        .brand-text{font-weight:800;letter-spacing:-.3px;color:var(--ink);line-height:1.25}
        .brand-text small{display:block;color:var(--brand);font-size:11px;letter-spacing:1.2px;margin-top:2px}
        .nav{display:flex;align-items:center;gap:5px}
        .nav a{padding:9px 13px;color:var(--muted);font-size:14px;border-radius:9px;transition:.2s ease}
        .nav a:hover,.nav a.active{color:var(--brand-dark);background:var(--mint);font-weight:700}
        .menu-toggle{display:none;background:none;border:0;color:var(--ink);font-size:25px}
        .page-hero{padding:68px 0 62px;background:linear-gradient(135deg,#f5fbf7 0%,#edf7f1 62%,#fff8e9 100%);border-bottom:1px solid var(--line)}
        .breadcrumb{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:13px;margin-bottom:25px}
        .breadcrumb a:hover{color:var(--brand)}
        .breadcrumb i{font-style:normal;color:#a3b3ac}
        .hero-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:70px;align-items:end}
        .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:800;font-size:13px;letter-spacing:.8px;margin-bottom:17px}
        .eyebrow:before,.section-kicker:before{content:"";width:22px;height:3px;background:var(--amber);border-radius:4px}
        .hero-copy{font-size:17px;color:var(--muted);max-width:720px;margin-top:21px}
        .hero-aside{background:#fff;border:1px solid var(--line);border-radius:18px;padding:23px;box-shadow:var(--shadow-sm)}
        .aside-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:17px;border-bottom:1px solid var(--line)}
        .aside-top strong{font-size:18px}
        .status{color:var(--brand);background:var(--mint);padding:4px 10px;border-radius:20px;font-size:12px;font-weight:700}
        .path-list{display:grid;gap:13px;margin-top:18px}
        .path-row{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--muted)}
        .path-no{width:28px;height:28px;border-radius:9px;background:var(--amber-soft);color:#996b18;display:grid;place-items:center;font-size:12px;font-weight:800}
        .section{padding:86px 0}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}
        .section-intro{color:var(--muted);max-width:610px;font-size:15px}
        .range-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:23px}
        .tag{display:inline-block;background:var(--amber-soft);color:#996b18;border-radius:30px;padding:5px 12px;font-size:12px;font-weight:750}
        .index-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
        .index-item{min-height:132px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:14px;transition:.2s ease}
        .index-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm);border-color:#a8d4c4}
        .index-item b{display:block;color:var(--brand);font-size:13px;margin-bottom:10px}
        .index-item strong{display:block;font-size:18px}
        .index-item span{display:block;color:var(--muted);font-size:13px;line-height:1.6;margin-top:6px}
        .content-section{background:#fff}
        .content-layout{display:grid;grid-template-columns:1fr 285px;gap:54px;align-items:start}
        .news-list{border-top:1px solid var(--line)}
        .news-item{display:grid;grid-template-columns:92px 1fr 104px;gap:20px;align-items:center;padding:23px 0;border-bottom:1px solid var(--line);transition:.2s ease}
        .news-item:hover{padding-left:8px;background:#fbfdfb}
        .news-date{color:var(--brand);font-size:13px;font-weight:800}
        .news-item h3{font-size:18px;line-height:1.4;margin-bottom:5px}
        .news-item p{color:var(--muted);font-size:14px;line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .news-meta{display:flex;justify-content:flex-end;align-items:center;gap:7px;color:var(--muted);font-size:12px}
        .news-meta:after{content:"→";font-size:17px;color:var(--brand)}
        .empty-state{padding:38px 20px;text-align:center;border:1px dashed #b9cec4;border-radius:14px;color:var(--muted);background:var(--soft)}
        .side-card{border:1px solid var(--line);border-radius:15px;padding:23px;background:var(--soft);position:sticky;top:105px}
        .side-card h3{font-size:19px;margin-bottom:12px}
        .side-card p{font-size:14px;color:var(--muted);margin-bottom:18px}
        .side-list{display:grid;gap:12px}
        .side-list div{display:flex;gap:10px;align-items:flex-start;font-size:14px}
        .side-list i{width:7px;height:7px;border-radius:50%;background:var(--amber);margin-top:10px;flex:none}
        .guide-band{background:#edf6f1}
        .guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
        .guide-card{padding:25px;background:#fff;border:1px solid var(--line);border-radius:15px}
        .guide-card .number{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--mint);color:var(--brand);font-weight:800;margin-bottom:16px}
        .guide-card h3{font-size:20px;margin-bottom:8px}
        .guide-card p{font-size:14px;color:var(--muted)}
        .notice{display:grid;grid-template-columns:auto 1fr;gap:15px;align-items:start;padding:23px 25px;background:var(--amber-soft);border:1px solid #f1d99e;border-radius:15px}
        .notice-icon{font-size:24px;color:#a57218}
        .notice h3{font-size:18px;margin-bottom:5px}
        .notice p{font-size:14px;color:#75633d}
        .faq-list{border-top:1px solid var(--line)}
        .faq-item{border-bottom:1px solid var(--line)}
        .faq-item summary{list-style:none;cursor:pointer;padding:19px 4px;font-weight:700;display:flex;justify-content:space-between;gap:20px}
        .faq-item summary::-webkit-details-marker{display:none}
        .faq-item summary:after{content:"+";color:var(--brand);font-size:22px;font-weight:400;line-height:1}
        .faq-item[open] summary:after{content:"−"}
        .faq-answer{color:var(--muted);font-size:14px;padding:0 35px 20px 4px}
        .cta{padding:28px 32px;border-radius:17px;background:var(--brand-dark);color:#fff;display:flex;justify-content:space-between;align-items:center;gap:25px}
        .cta h2{font-size:25px}
        .cta p{color:#c5ddd3;font-size:14px;margin-top:5px}
        .btn{min-height:46px;padding:10px 20px;border-radius:10px;border:1px solid transparent;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:750;transition:.2s ease}
        .btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(8,127,104,.2)}
        .btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px)}
        .btn-secondary{background:#fff;color:var(--brand-dark);border-color:var(--line)}
        .btn-secondary:hover{border-color:var(--brand);background:var(--soft);transform:translateY(-2px)}
        .btn-light{background:#fff;color:var(--brand-dark)}
        .btn-light:hover{background:var(--mint);transform:translateY(-2px)}
        a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid rgba(232,168,62,.55);outline-offset:3px}
        .site-footer{background:#17352d;color:#dcebe5;padding:56px 0 22px}
        .footer-grid{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:35px}
        .footer-brand{font-size:18px;font-weight:800}
        .footer-brand p{font-size:13px;font-weight:400;color:#a9c2b8;line-height:1.7;margin-top:12px;max-width:290px}
        .footer-col{display:grid;align-content:start;gap:8px}
        .footer-col h3{font-size:14px;color:#fff;margin-bottom:7px}
        .footer-col a{color:#a9c2b8;font-size:13px;transition:.2s}
        .footer-col a:hover{color:#fff;padding-left:3px}
        .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(220,235,229,.16);margin-top:40px;padding-top:18px;color:#91ada1;font-size:12px}
        @media(max-width:1024px){
            .nav-wrap{gap:15px}.brand{min-width:220px}.nav a{padding:8px 8px;font-size:13px}
            .hero-layout{gap:35px}.content-layout{gap:30px}
        }
        @media(max-width:768px){
            .container{width:min(100% - 36px,620px)}
            .nav-wrap{height:68px}.menu-toggle{display:block}.nav{display:none;position:absolute;top:68px;left:0;right:0;padding:12px 18px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:var(--shadow-sm);flex-direction:column;align-items:stretch}
            .nav.open{display:flex}.nav a{padding:12px 14px}
            .brand{min-width:0}.brand-text{font-size:14px}.brand-text small{font-size:9px}
            .hero-layout,.content-layout{grid-template-columns:1fr}.page-hero{padding:48px 0 45px}
            h1{font-size:35px}.section{padding:62px 0}.section-head{display:block}.section-intro{margin-top:12px}
            .index-strip{grid-template-columns:repeat(2,1fr)}.side-card{position:static}
            .news-item{grid-template-columns:75px 1fr}.news-meta{grid-column:2;justify-content:flex-start}
            .guide-grid{grid-template-columns:1fr}.cta{display:block}.cta .btn{margin-top:20px}
            .footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.copyright{display:block}.copyright span{display:block;margin-top:5px}
        }
        @media(max-width:520px){
            .container{width:calc(100% - 30px)}.hero-aside{padding:18px}
            .index-strip{grid-template-columns:1fr}.news-item{grid-template-columns:1fr;gap:7px}.news-meta{grid-column:auto}
            .notice{grid-template-columns:1fr;gap:5px}.footer-grid{grid-template-columns:1fr}
        }

/* roulang page: category2 */
:root{
            --ink:#172923;
            --muted:#667670;
            --soft:#f3f7f4;
            --paper:#fbfdfb;
            --line:#dce8e1;
            --brand:#087f68;
            --brand-dark:#075b4c;
            --mint:#d8f1e8;
            --amber:#e8a83e;
            --amber-soft:#fff4dc;
            --white:#fff;
            --radius:16px;
            --shadow:0 16px 40px rgba(20,61,48,.08);
            --shadow-sm:0 7px 20px rgba(20,61,48,.07);
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}
        a{color:inherit;text-decoration:none}
        img{max-width:100%;display:block}
        button,input,select,textarea{font:inherit}
        button{cursor:pointer}
        h1,h2,h3,p{margin:0}
        h1{font-size:clamp(34px,4.5vw,52px);line-height:1.2;letter-spacing:-1.5px}
        h2{font-size:32px;line-height:1.3;letter-spacing:-.6px}
        h3{line-height:1.4}
        .container{width:min(1180px,calc(100% - 48px));margin:0 auto}
        .site-header{position:sticky;top:0;z-index:20;background:rgba(251,253,251,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
        .nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between;gap:30px}
        .brand{display:flex;align-items:center;gap:11px;min-width:245px}
        .brand-mark{width:38px;height:38px;border-radius:12px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:18px;font-weight:800;box-shadow:0 6px 14px rgba(8,127,104,.22)}
        .brand-text{font-weight:800;letter-spacing:-.3px;color:var(--ink);line-height:1.25}
        .brand-text small{display:block;color:var(--brand);font-size:11px;letter-spacing:1.2px;margin-top:2px}
        .nav{display:flex;align-items:center;gap:5px}
        .nav a{padding:9px 13px;color:var(--muted);font-size:14px;border-radius:9px;transition:.2s ease}
        .nav a:hover,.nav a.active{color:var(--brand-dark);background:var(--mint);font-weight:700}
        .menu-toggle{display:none;background:none;border:0;color:var(--ink);font-size:25px}
        .page-hero{padding:68px 0 62px;background:linear-gradient(135deg,#f5fbf7 0%,#edf7f1 62%,#fff8e9 100%);border-bottom:1px solid var(--line)}
        .crumbs{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:13px;margin-bottom:27px}
        .crumbs a:hover{color:var(--brand)}
        .crumbs .current{color:var(--ink);font-weight:700}
        .hero-layout{display:grid;grid-template-columns:1.12fr .88fr;gap:68px;align-items:center}
        .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:800;font-size:13px;letter-spacing:.8px}
        .eyebrow:before,.section-kicker:before{content:"";width:22px;height:3px;background:var(--amber);border-radius:4px}
        .page-hero h1{margin:13px 0 20px}
        .hero-copy{max-width:680px;color:var(--muted);font-size:17px}
        .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
        .btn{min-height:46px;padding:10px 20px;border-radius:10px;border:1px solid transparent;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:750;transition:.2s ease}
        .btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(8,127,104,.2)}
        .btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);color:#fff}
        .btn-secondary{background:#fff;color:var(--brand-dark);border-color:var(--line)}
        .btn-secondary:hover{border-color:var(--brand);background:var(--soft);transform:translateY(-2px)}
        .download-panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:25px;box-shadow:var(--shadow)}
        .panel-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:17px}
        .panel-title{font-size:18px;font-weight:800}
        .status{font-size:11px;color:var(--brand);background:var(--mint);padding:4px 9px;border-radius:30px;font-weight:750}
        .download-row{display:flex;align-items:center;gap:16px;padding:22px 0 8px}
        .app-icon{width:54px;height:54px;border-radius:15px;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px}
        .download-row strong{display:block;font-size:16px}
        .download-row span{display:block;color:var(--muted);font-size:13px}
        .panel-lines{display:grid;gap:10px;margin-top:16px}
        .panel-lines i{height:9px;border-radius:9px;background:#d9eee6;display:block}
        .panel-lines i:nth-child(2){width:76%;background:#f3dfb0}
        .panel-lines i:nth-child(3){width:55%}
        .section{padding:84px 0}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}
        .section-head h2{margin-top:9px}
        .section-intro{color:var(--muted);max-width:580px}
        .topic-bar{display:flex;gap:10px;flex-wrap:wrap}
        .topic{border:1px solid var(--line);background:#fff;border-radius:30px;padding:8px 16px;color:var(--muted);font-size:14px;transition:.2s}
        .topic:hover,.topic.selected{background:var(--mint);color:var(--brand-dark);border-color:#a8d4c4}
        .content-section{background:#fff}
        .content-list{border-top:1px solid var(--line)}
        .content-item{display:grid;grid-template-columns:110px 1fr 110px;gap:24px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line);transition:.2s}
        .content-item:hover{padding-left:9px;background:#fbfdfb}
        .date{font-size:13px;color:var(--brand);font-weight:750}
        .item-label{display:inline-block;background:var(--amber-soft);color:#996b18;border-radius:30px;padding:3px 10px;font-size:11px;font-weight:750;margin-bottom:6px}
        .content-item h3{font-size:18px}
        .content-item p{font-size:14px;color:var(--muted);margin-top:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .read-link{font-size:13px;color:var(--brand);font-weight:750;text-align:right}
        .read-link:hover{color:var(--brand-dark)}
        .empty-state{padding:38px 0;color:var(--muted);font-size:14px}
        .more-row{text-align:center;margin-top:28px}
        .steps-area{background:var(--soft)}
        .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
        .steps:before{content:"";position:absolute;top:21px;left:8%;right:8%;height:1px;background:#b9d8cb}
        .step{position:relative;padding:0 20px;text-align:center}
        .step-number{width:43px;height:43px;margin:0 auto 17px;border-radius:13px;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800;position:relative;z-index:1;box-shadow:0 0 0 7px var(--soft)}
        .step h3{font-size:17px;margin-bottom:5px}
        .step p{font-size:14px;color:var(--muted)}
        .device-section{padding:84px 0;background:#edf6f1}
        .device-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-top:30px}
        .device-card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:24px;transition:.2s}
        .device-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm)}
        .device-symbol{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:var(--mint);color:var(--brand);font-weight:800;margin-bottom:17px}
        .device-card h3{font-size:18px;margin-bottom:7px}
        .device-card p{font-size:14px;color:var(--muted)}
        .device-card .tag{margin-top:15px}
        .tag{display:inline-block;background:var(--amber-soft);color:#996b18;border-radius:30px;padding:3px 9px;font-size:11px;font-weight:750}
        .support-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
        .support-card{border:1px solid var(--line);border-radius:16px;padding:27px;background:#fff}
        .support-card h3{font-size:21px;margin:13px 0 8px}
        .support-card p{color:var(--muted);font-size:14px}
        .support-card ul{padding-left:19px;margin:15px 0 0;color:var(--muted);font-size:14px}
        .support-card li{margin:5px 0}
        .icon-badge{width:40px;height:40px;border-radius:12px;background:var(--amber-soft);color:#996b18;display:grid;place-items:center;font-weight:800}
        .faq-section{background:#fff}
        .faq-list{max-width:850px;border-top:1px solid var(--line)}
        .faq-item{border-bottom:1px solid var(--line)}
        .faq-item summary{list-style:none;cursor:pointer;padding:19px 3px;font-weight:750;display:flex;justify-content:space-between;gap:20px}
        .faq-item summary::-webkit-details-marker{display:none}
        .faq-item summary:after{content:"＋";color:var(--brand);font-size:20px;line-height:1}
        .faq-item[open] summary:after{content:"－"}
        .faq-answer{padding:0 30px 20px 3px;color:var(--muted);font-size:14px}
        .cta{padding:40px;background:var(--brand);color:#fff;border-radius:20px;display:flex;align-items:center;justify-content:space-between;gap:25px}
        .cta h2{font-size:27px}
        .cta p{color:#cce8dd;margin-top:7px;font-size:14px}
        .cta .btn-secondary{border:0;background:#fff}
        .site-footer{background:#17352c;color:#d9ebe3;padding:55px 0 22px}
        .footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:35px}
        .footer-brand{font-size:18px;font-weight:800;color:#fff}
        .footer-brand p{font-size:13px;line-height:1.8;color:#a8c0b5;font-weight:400;margin-top:13px;max-width:260px}
        .footer-col h3{color:#fff;font-size:14px;margin-bottom:12px}
        .footer-col a{display:block;color:#a8c0b5;font-size:13px;margin:7px 0;transition:.2s}
        .footer-col a:hover{color:#fff;transform:translateX(2px)}
        .copyright{border-top:1px solid rgba(216,241,232,.16);margin-top:37px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;color:#91ada1;font-size:12px}
        :focus-visible{outline:3px solid rgba(232,168,62,.55);outline-offset:3px}
        @media(max-width:1024px){
            .nav-wrap{gap:15px}.brand{min-width:215px}.nav a{padding:8px 8px;font-size:13px}
            .hero-layout{gap:35px}.steps{grid-template-columns:repeat(2,1fr);gap:35px}.steps:before{display:none}
        }
        @media(max-width:768px){
            .container{width:min(100% - 32px,620px)}
            .nav-wrap{height:68px}.menu-toggle{display:block}.nav{display:none;position:absolute;top:68px;left:0;right:0;padding:10px 16px 15px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:var(--shadow-sm);flex-direction:column;align-items:stretch}
            .nav.open{display:flex}.nav a{padding:11px 13px}
            .hero-layout{grid-template-columns:1fr}.page-hero{padding:42px 0 48px}.page-hero h1{font-size:36px}
            .section{padding:62px 0}.section-head{display:block}.section-intro{margin-top:12px}
            .content-item{grid-template-columns:78px 1fr;gap:13px}.read-link{grid-column:2;text-align:left}.device-grid,.support-grid{grid-template-columns:1fr}
            .cta{display:block;padding:29px}.cta .btn{margin-top:20px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-brand{grid-column:1/-1}
        }
        @media(max-width:520px){
            h2{font-size:26px}.brand-text{font-size:14px}.brand-text small{font-size:9px}.brand-mark{width:35px;height:35px}
            .hero-actions .btn{width:100%}.download-panel{padding:19px}.steps{grid-template-columns:1fr;gap:27px}
            .topic{font-size:13px;padding:7px 12px}.content-item{grid-template-columns:1fr}.read-link{grid-column:auto}
            .footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin-top:5px}
        }

/* roulang page: category4 */
:root{
            --ink:#172923;
            --muted:#667670;
            --soft:#f3f7f4;
            --paper:#fbfdfb;
            --line:#dce8e1;
            --brand:#087f68;
            --brand-dark:#075b4c;
            --mint:#d8f1e8;
            --amber:#e8a83e;
            --amber-soft:#fff4dc;
            --white:#fff;
            --radius:16px;
            --shadow:0 16px 40px rgba(20,61,48,.08);
            --shadow-sm:0 7px 20px rgba(20,61,48,.07);
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
            background:var(--paper);
            color:var(--ink);
            font-size:16px;
            line-height:1.8;
        }
        a{color:inherit;text-decoration:none}
        img{max-width:100%;display:block}
        button,input,select,textarea{font:inherit}
        button{cursor:pointer}
        h1,h2,h3,p{margin-top:0}
        h1,h2,h3{letter-spacing:-.03em}
        h1{font-size:clamp(34px,5vw,52px);line-height:1.2;font-weight:800;margin-bottom:20px}
        h2{font-size:clamp(26px,3vw,34px);line-height:1.3;font-weight:800;margin-bottom:14px}
        h3{font-size:19px;line-height:1.4}
        .container{width:min(1180px,calc(100% - 48px));margin:0 auto}
        .site-header{
            position:sticky;top:0;z-index:20;background:rgba(251,253,251,.94);
            border-bottom:1px solid var(--line);backdrop-filter:blur(12px)
        }
        .nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between;gap:30px}
        .brand{display:flex;align-items:center;gap:11px;min-width:245px}
        .brand-mark{
            width:38px;height:38px;border-radius:12px;background:var(--brand);color:#fff;
            display:grid;place-items:center;font-size:18px;font-weight:800;
            box-shadow:0 6px 14px rgba(8,127,104,.22)
        }
        .brand-text{font-weight:800;letter-spacing:-.3px;color:var(--ink);line-height:1.25}
        .brand-text small{display:block;color:var(--brand);font-size:11px;letter-spacing:1.2px;margin-top:2px}
        .nav{display:flex;align-items:center;gap:5px}
        .nav a{
            padding:9px 13px;color:var(--muted);font-size:14px;border-radius:9px;transition:.2s ease
        }
        .nav a:hover,.nav a.active{color:var(--brand-dark);background:var(--mint);font-weight:700}
        .menu-toggle{display:none;background:none;border:0;color:var(--ink);font-size:25px}
        .page-hero{
            padding:58px 0 64px;
            background:linear-gradient(135deg,#f5fbf7 0%,#edf7f1 62%,#fff8e9 100%);
            border-bottom:1px solid var(--line)
        }
        .breadcrumb{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:30px}
        .breadcrumb a:hover{color:var(--brand)}
        .breadcrumb i{font-style:normal;color:#9bad9f}
        .hero-layout{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(330px,.9fr);gap:70px;align-items:end}
        .eyebrow,.section-kicker{
            display:inline-flex;align-items:center;gap:8px;color:var(--brand);
            font-weight:800;font-size:13px;letter-spacing:.8px;margin-bottom:15px
        }
        .eyebrow:before,.section-kicker:before{content:"";width:22px;height:3px;background:var(--amber);border-radius:4px}
        .hero-copy{font-size:18px;color:var(--muted);max-width:700px;margin-bottom:0}
        .hero-aside{
            background:#fff;border:1px solid var(--line);border-radius:20px;padding:25px;
            box-shadow:var(--shadow-sm)
        }
        .aside-label{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:13px;margin-bottom:17px}
        .status{color:var(--brand);background:var(--mint);padding:4px 10px;border-radius:20px;font-weight:700;font-size:12px}
        .path-line{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
        .path-node{padding:10px 13px;background:var(--soft);border:1px solid var(--line);border-radius:10px;font-size:13px;font-weight:700}
        .path-node.current{background:var(--brand);border-color:var(--brand);color:#fff}
        .path-arrow{color:var(--amber);font-weight:800}
        .section{padding:86px 0}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}
        .section-intro{color:var(--muted);max-width:610px;margin-bottom:0}
        .topic-bar{display:flex;gap:10px;flex-wrap:wrap;padding:18px;background:#fff;border:1px solid var(--line);border-radius:14px}
        .topic{
            padding:8px 14px;border-radius:9px;background:var(--soft);color:var(--muted);
            font-size:14px;border:1px solid transparent;transition:.2s
        }
        .topic:hover,.topic.active{background:var(--mint);border-color:#a8d4c4;color:var(--brand-dark);font-weight:700}
        .guide-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:18px}
        .guide-panel,.device-panel,.feature-guide{
            background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)
        }
        .guide-panel{padding:28px}
        .guide-panel h3{margin-bottom:17px}
        .step-list{display:grid;gap:0}
        .step-item{display:grid;grid-template-columns:42px 1fr;gap:15px;padding:17px 0;border-top:1px solid var(--line)}
        .step-item:first-child{border-top:0;padding-top:0}
        .step-number{
            width:32px;height:32px;display:grid;place-items:center;border-radius:9px;
            background:var(--amber-soft);color:#996b18;font-weight:800
        }
        .step-item strong{display:block;font-size:16px}
        .step-item p{color:var(--muted);font-size:14px;margin:3px 0 0}
        .device-panel{padding:28px;background:#edf6f1}
        .device-row{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:17px 0;border-bottom:1px solid #cfe2d8}
        .device-row:last-child{border-bottom:0}
        .device-name{display:flex;align-items:center;gap:12px;font-weight:750}
        .device-icon{
            width:34px;height:34px;border-radius:10px;background:#fff;color:var(--brand);
            display:grid;place-items:center;font-weight:800;border:1px solid #cfe2d8
        }
        .device-note{font-size:13px;color:var(--muted);text-align:right}
        .news-section{background:#fff}
        .news-list{border-top:1px solid var(--line)}
        .news-item{
            display:grid;grid-template-columns:105px 1fr 112px;gap:22px;align-items:center;
            padding:22px 0;border-bottom:1px solid var(--line);transition:.2s
        }
        .news-item:hover{padding-left:8px;background:#fbfdfb}
        .news-date{color:var(--brand);font-size:13px;font-weight:750}
        .news-item h3{font-size:18px;margin-bottom:4px}
        .news-item p{color:var(--muted);font-size:14px;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .news-meta{display:flex;justify-content:flex-end;align-items:center;gap:7px;flex-wrap:wrap}
        .tag{display:inline-block;background:var(--amber-soft);color:#996b18;border-radius:30px;padding:3px 9px;font-size:11px;font-weight:750}
        .read-link{color:var(--brand);font-size:13px;font-weight:750;white-space:nowrap}
        .read-link:hover{color:var(--brand-dark)}
        .empty-state{padding:35px 0;text-align:center;color:var(--muted)}
        .feature-guide{display:grid;grid-template-columns:125px 1fr auto;align-items:center;gap:25px;padding:28px}
        .feature-number{font-size:58px;line-height:1;color:var(--mint);font-weight:900}
        .feature-guide h3{margin-bottom:7px}
        .feature-guide p{color:var(--muted);font-size:14px;margin:0}
        .btn{
            min-height:46px;padding:10px 20px;border-radius:10px;border:1px solid transparent;
            display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:750;transition:.2s ease
        }
        .btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(8,127,104,.2)}
        .btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);color:#fff}
        .btn-secondary{background:#fff;color:var(--brand-dark);border-color:var(--line)}
        .btn-secondary:hover{border-color:var(--brand);background:var(--soft);transform:translateY(-2px)}
        .faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
        .faq-item{background:#fff;border:1px solid var(--line);border-radius:13px;padding:0 20px}
        .faq-item summary{padding:18px 0;font-weight:750;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:15px}
        .faq-item summary::-webkit-details-marker{display:none}
        .faq-item summary:after{content:"+";color:var(--brand);font-size:22px;line-height:1}
        .faq-item[open] summary:after{content:"−"}
        .faq-answer{padding:0 0 18px;color:var(--muted);font-size:14px}
        .safety{background:var(--amber-soft);border:1px solid #f0d79f;border-left:5px solid var(--amber);padding:22px 25px;border-radius:12px}
        .safety strong{display:block;margin-bottom:5px}
        .safety p{color:#765b27;margin:0;font-size:14px}
        .cta{
            padding:38px 42px;background:var(--brand-dark);border-radius:20px;color:#fff;
            display:flex;justify-content:space-between;align-items:center;gap:25px
        }
        .cta h2{font-size:28px;margin-bottom:6px}
        .cta p{color:#c9e2d8;margin:0}
        .cta .btn-secondary{background:#fff;border-color:#fff}
        .site-footer{background:#163b31;color:#d8e9e1;padding:55px 0 22px}
        .footer-grid{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:38px}
        .footer-brand{font-weight:800;font-size:18px}
        .footer-brand p{font-size:13px;color:#a9c4b8;font-weight:400;line-height:1.7;margin-top:12px;max-width:300px}
        .footer-col h3{font-size:14px;color:#fff;margin-bottom:13px}
        .footer-col a{display:block;color:#a9c4b8;font-size:13px;margin:7px 0;transition:.2s}
        .footer-col a:hover{color:#fff}
        .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #31584c;margin-top:40px;padding-top:18px;color:#91afa3;font-size:12px}
        :focus-visible{outline:3px solid rgba(232,168,62,.65);outline-offset:3px}
        @media(max-width:1024px){
            .nav-wrap{gap:15px}.brand{min-width:220px}.nav a{padding:8px 9px;font-size:13px}
            .hero-layout{gap:35px}.quick-grid{grid-template-columns:repeat(3,1fr)}
        }
        @media(max-width:768px){
            .container{width:min(100% - 34px,620px)}
            .nav-wrap{height:68px}.brand-text{font-size:14px}.brand{min-width:0}
            .menu-toggle{display:block}.nav{display:none;position:absolute;top:68px;left:0;right:0;padding:12px 17px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:var(--shadow-sm);flex-direction:column;align-items:stretch}
            .nav.open{display:flex}.nav a{padding:11px 13px}
            .hero-layout,.guide-grid{grid-template-columns:1fr}
            .page-hero{padding:40px 0 45px}.section{padding:62px 0}
            .section-head{display:block}.section-intro{margin-top:10px}
            .news-item{grid-template-columns:1fr;gap:6px;padding:20px 0}
            .news-meta{justify-content:flex-start}.feature-guide{grid-template-columns:65px 1fr;padding:22px;gap:16px}.feature-guide .btn{grid-column:2;justify-self:start}
            .faq-grid{grid-template-columns:1fr}.cta{display:block;padding:30px 25px}.cta .btn{margin-top:20px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-brand{grid-column:1/-1}
            .copyright{display:block}.copyright span{display:block;margin-top:5px}
        }
        @media(max-width:520px){
            h1{font-size:34px}.hero-copy{font-size:16px}.quick-grid{grid-template-columns:1fr 1fr}
            .path-line{gap:6px}.path-node{font-size:12px;padding:8px 9px}.path-arrow{font-size:12px}
            .guide-panel,.device-panel{padding:21px}.device-row{align-items:flex-start}.device-note{font-size:12px}
            .footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}
        }

/* roulang page: category3 */
:root{
            --ink:#172923;
            --muted:#667670;
            --soft:#f3f7f4;
            --paper:#fbfdfb;
            --line:#dce8e1;
            --brand:#087f68;
            --brand-dark:#075b4c;
            --mint:#d8f1e8;
            --amber:#e8a83e;
            --amber-soft:#fff4dc;
            --white:#fff;
            --radius:16px;
            --shadow:0 16px 40px rgba(20,61,48,.08);
            --shadow-sm:0 7px 20px rgba(20,61,48,.07);
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}
        h1,h2,h3,p{margin:0}
        h1,h2,h3{letter-spacing:-.035em}
        a{color:inherit;text-decoration:none}
        img{max-width:100%;display:block}
        button,input,select,textarea{font:inherit}
        button{cursor:pointer}
        .container{width:min(1180px,calc(100% - 48px));margin:0 auto}
        .site-header{position:sticky;top:0;z-index:20;background:rgba(251,253,251,.95);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
        .nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between;gap:30px}
        .brand{display:flex;align-items:center;gap:11px;min-width:245px}
        .brand-mark{width:38px;height:38px;border-radius:12px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:18px;font-weight:800;box-shadow:0 6px 14px rgba(8,127,104,.22)}
        .brand-text{font-weight:800;letter-spacing:-.3px;color:var(--ink);line-height:1.25}
        .brand-text small{display:block;color:var(--brand);font-size:11px;letter-spacing:1.2px;margin-top:2px}
        .nav{display:flex;align-items:center;gap:5px}
        .nav a{padding:9px 13px;color:var(--muted);font-size:14px;border-radius:9px;transition:.2s ease}
        .nav a:hover,.nav a.active{color:var(--brand-dark);background:var(--mint);font-weight:700}
        .menu-toggle{display:none;background:none;border:0;color:var(--ink);font-size:25px}
        .page-hero{padding:72px 0 66px;background:linear-gradient(135deg,#f5fbf7 0%,#edf7f1 62%,#fff8e9 100%);border-bottom:1px solid var(--line)}
        .hero-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:70px;align-items:end}
        .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:800;font-size:13px;letter-spacing:.8px}
        .eyebrow:before,.section-kicker:before{content:"";width:22px;height:3px;background:var(--amber);border-radius:4px}
        h1{font-size:clamp(36px,5vw,54px);line-height:1.18;margin:18px 0 20px;font-weight:800}
        .hero-copy{max-width:700px;color:var(--muted);font-size:18px}
        .hero-aside{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--shadow-sm)}
        .aside-label{font-size:12px;color:var(--muted);margin-bottom:12px}
        .status-row{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding:13px 0}
        .status-row:last-child{border-bottom:0;padding-bottom:0}
        .status-row strong{font-size:16px}
        .status{font-size:12px;color:var(--brand);background:var(--mint);padding:3px 9px;border-radius:20px;font-weight:700}
        .section{padding:84px 0}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}
        .section h2{font-size:32px;line-height:1.3;margin-top:10px}
        .section-intro{color:var(--muted);max-width:570px}
        .topic-bar{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
        .topic{padding:9px 16px;border:1px solid var(--line);background:#fff;border-radius:30px;color:var(--muted);font-size:14px;transition:.2s}
        .topic:hover,.topic.active{background:var(--mint);border-color:#a8d4c4;color:var(--brand-dark);font-weight:700}
        .news-layout{display:grid;grid-template-columns:220px 1fr;gap:52px;align-items:start}
        .news-intro{position:sticky;top:110px}
        .news-intro h2{margin-bottom:14px}
        .news-intro p{color:var(--muted);font-size:14px}
        .news-list{border-top:1px solid var(--line)}
        .news-item{display:grid;grid-template-columns:105px 1fr 92px;gap:24px;align-items:center;padding:23px 0;border-bottom:1px solid var(--line);transition:.2s}
        .news-item:hover{padding-left:10px;background:#fbfdfb}
        .news-date{color:var(--brand);font-size:13px;font-weight:750}
        .news-item h3{font-size:19px;line-height:1.4}
        .news-item p{font-size:14px;color:var(--muted);margin-top:5px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .tag{display:inline-block;background:var(--amber-soft);color:#996b18;border-radius:30px;padding:3px 9px;font-size:11px;font-weight:750;white-space:nowrap}
        .read-link{color:var(--brand);font-size:13px;font-weight:750;text-align:right}
        .read-link:after{content:" →";transition:.2s}
        .news-item:hover .read-link:after{padding-left:4px}
        .empty-state{padding:38px 20px;text-align:center;color:var(--muted);border:1px dashed #b9d2c6;border-radius:14px;background:var(--soft)}
        .feature-band{background:#17382f;color:#fff}
        .feature-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:56px;align-items:center}
        .feature-band .section-kicker{color:#9ed8c5}
        .feature-band h2{font-size:31px;margin:12px 0 15px}
        .feature-band p{color:#bfd2ca}
        .feature-points{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
        .point{border:1px solid rgba(216,241,232,.22);border-radius:13px;padding:19px;background:rgba(255,255,255,.05)}
        .point b{display:block;color:#fff;font-size:16px;margin-bottom:4px}
        .point span{font-size:13px;color:#bcd1c7}
        .timeline{border-left:2px solid #b7d9cc;margin:28px 0 0 10px;padding-left:30px;display:grid;gap:27px}
        .timeline-item{position:relative}
        .timeline-item:before{content:"";position:absolute;width:11px;height:11px;border-radius:50%;background:var(--amber);left:-37px;top:10px;box-shadow:0 0 0 5px var(--paper)}
        .timeline-item strong{font-size:17px}
        .timeline-item span{font-size:13px;color:var(--muted);margin-left:12px}
        .timeline-item p{font-size:14px;color:var(--muted);margin-top:4px}
        .notice{background:var(--amber-soft);border:1px solid #f0d69d;border-radius:16px;padding:25px 28px;display:flex;gap:18px;align-items:flex-start}
        .notice-icon{width:34px;height:34px;flex:none;border-radius:10px;background:#fff;color:#a47017;display:grid;place-items:center;font-weight:800}
        .notice h3{font-size:19px;margin-bottom:5px}
        .notice p{font-size:14px;color:#80672e}
        .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
        .faq-item{background:#fff;border:1px solid var(--line);border-radius:13px;padding:19px 22px}
        .faq-item summary{cursor:pointer;font-weight:750;list-style:none;position:relative;padding-right:25px}
        .faq-item summary::-webkit-details-marker{display:none}
        .faq-item summary:after{content:"+";position:absolute;right:0;color:var(--brand);font-size:22px;line-height:1}
        .faq-item[open] summary:after{content:"−"}
        .faq-item p{font-size:14px;color:var(--muted);padding-top:11px}
        .cta{padding:38px 42px;background:var(--mint);border:1px solid #b9dfd0;border-radius:18px;display:flex;justify-content:space-between;align-items:center;gap:24px}
        .cta h2{font-size:27px;margin-bottom:6px}
        .cta p{color:var(--muted);font-size:14px}
        .btn{min-height:46px;padding:10px 20px;border-radius:10px;border:1px solid transparent;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:750;transition:.2s ease}
        .btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(8,127,104,.2)}
        .btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px)}
        .btn-secondary{background:#fff;color:var(--brand-dark);border-color:var(--line)}
        .btn-secondary:hover{border-color:var(--brand);background:var(--soft);transform:translateY(-2px)}
        .site-footer{background:#17382f;color:#d6e6df;padding:54px 0 22px}
        .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:35px}
        .footer-brand{font-size:18px;font-weight:800;color:#fff}
        .footer-brand p{font-size:13px;font-weight:400;line-height:1.8;color:#a9c2b7;margin-top:12px;max-width:280px}
        .footer-col h3{font-size:14px;color:#fff;margin-bottom:12px}
        .footer-col a{display:block;font-size:13px;color:#a9c2b7;margin:8px 0;transition:.2s}
        .footer-col a:hover{color:#fff;padding-left:3px}
        .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(216,241,232,.16);margin-top:38px;padding-top:18px;color:#8faea1;font-size:12px}
        :focus-visible{outline:3px solid rgba(232,168,62,.65);outline-offset:3px}
        @media(max-width:1024px){
            .nav-wrap{gap:15px}.brand{min-width:205px}.nav a{padding:8px 9px;font-size:13px}
            .hero-layout,.feature-grid{gap:35px}
            .news-layout{grid-template-columns:180px 1fr;gap:30px}
        }
        @media(max-width:768px){
            .container{width:min(100% - 36px,620px)}
            .nav-wrap{height:68px}.menu-toggle{display:block}
            .nav{display:none;position:absolute;top:68px;left:0;right:0;padding:12px 18px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:var(--shadow-sm);flex-direction:column;align-items:stretch}
            .nav.open{display:flex}.nav a{padding:11px 13px}
            .page-hero{padding:55px 0}.hero-layout,.feature-grid,.news-layout{grid-template-columns:1fr}
            .hero-aside{max-width:520px}.news-intro{position:static}
            .section{padding:62px 0}.section h2{font-size:27px}
            .news-item{grid-template-columns:82px 1fr;gap:14px}.news-item .read-link{grid-column:2;text-align:left}
            .feature-points,.faq-grid{grid-template-columns:1fr}
            .cta{align-items:flex-start;flex-direction:column;padding:28px 24px}
            .footer-grid{grid-template-columns:1.4fr 1fr;gap:28px}
            .copyright{flex-direction:column;gap:6px}
        }
        @media(max-width:520px){
            h1{font-size:34px}.hero-copy{font-size:16px}
            .section-head{display:block}.section-intro{margin-top:12px}
            .topic-bar{gap:7px}.topic{padding:7px 12px}
            .footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}
            .brand{min-width:0}.brand-text{font-size:14px}.brand-text small{font-size:9px}
        }