/* roulang page: index */
:root{--ink:#17221f;--muted:#687571;--paper:#f5f8f4;--surface:#fff;--line:#dce6df;--green:#146b52;--green-dark:#0b4538;--lime:#d6f36b;--gold:#f4b84a;--focus:#4c9cff;--shadow:0 18px 45px rgba(22,55,44,.10);--radius:20px;--small-radius:12px;--max:1180px;--ease:220ms ease}
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;line-height:1.65}a{color:var(--green);text-decoration:none;transition:var(--ease)}a:hover{color:var(--green-dark)}img{display:block;max-width:100%;height:auto}button,a{touch-action:manipulation}::selection{background:var(--lime);color:var(--ink)}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
    .container{width:min(var(--max),calc(100% - 40px));margin:auto}.site-header{padding:20px 0 10px}.nav-panel{display:flex;align-items:center;gap:12px;padding:12px 14px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}.brand{display:flex;align-items:center;gap:10px;margin-right:auto;font-weight:850;font-size:1.25rem;letter-spacing:-.04em;color:var(--ink)}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--green);color:var(--lime);font-weight:900}.nav-links{display:flex;gap:7px;align-items:center}.nav-links a{padding:9px 12px;border:1px solid transparent;border-radius:10px;color:var(--muted);font-size:.86rem;font-weight:700}.nav-links a:hover,.nav-links a.active{background:#eef6ef;border-color:var(--line);color:var(--green-dark)}.nav-cta,.button-primary{display:inline-flex;align-items:center;justify-content:center;background:var(--lime);color:var(--green-dark);font-weight:850;border:0;border-radius:11px;padding:12px 18px;box-shadow:0 7px 18px rgba(140,170,49,.2)}.nav-cta:hover,.button-primary:hover{background:#c6e85a;color:var(--green-dark);transform:translateY(-2px)}.menu-toggle{display:none;background:transparent;border:1px solid var(--line);border-radius:10px;padding:8px 12px;color:var(--green-dark);font-weight:800}
    .hero{margin-top:28px;padding:68px 0 54px;background:linear-gradient(110deg,#e8f4e9 0%,#f7fbf4 57%,#dcefe1 100%);border-radius:28px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:55px;align-items:center}.eyebrow,.kicker{display:inline-flex;align-items:center;gap:7px;color:var(--green);font-size:.75rem;text-transform:uppercase;letter-spacing:.13em;font-weight:850}.eyebrow:before{content:"";width:24px;height:2px;background:var(--gold)}h1,h2,h3{line-height:1.12;letter-spacing:-.045em;margin:0 0 16px}h1{font-size:clamp(2.5rem,5vw,4.8rem);max-width:680px}h2{font-size:clamp(1.75rem,3vw,2.7rem)}h3{font-size:1.2rem}.hero p{font-size:1.08rem;color:var(--muted);max-width:650px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:27px 0}.button-secondary{display:inline-flex;align-items:center;justify-content:center;padding:11px 17px;border:1px solid var(--green);border-radius:11px;color:var(--green-dark);font-weight:800}.button-secondary:hover{background:var(--green);color:#fff}.trust-row{display:flex;gap:20px;flex-wrap:wrap;color:var(--muted);font-size:.85rem;font-weight:700}.hero-art{position:relative;min-height:350px;border-radius:24px;overflow:hidden;background:#173e34 url('/assets/images/backpic/back-1.jpg') center/cover}.hero-art:after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(11,69,56,.84),rgba(11,69,56,.18))}.device-card{position:absolute;z-index:1;right:11%;bottom:12%;width:220px;padding:20px;background:#fff;border-radius:22px;box-shadow:0 24px 50px rgba(0,0,0,.2)}.device-card strong{display:block;font-size:1.4rem;color:var(--green-dark)}.mini-bar{height:9px;background:#e7eee8;border-radius:9px;margin:16px 0}.mini-bar span{display:block;width:72%;height:100%;background:var(--gold);border-radius:9px}
    main{padding:12px 0 70px}.section{padding:78px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}.section-head p{max-width:570px;color:var(--muted);margin:0}.panel,.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(22,55,44,.05)}.panel{padding:28px}.quick-panel{display:grid;grid-template-columns:1fr auto;align-items:center;gap:25px;background:var(--green-dark);color:#fff}.quick-panel p{color:#c9ded4;margin:0}.badge{display:inline-block;padding:5px 9px;border-radius:8px;background:#edf6df;color:var(--green-dark);font-size:.72rem;font-weight:850;text-transform:uppercase;letter-spacing:.08em}.quick-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:17px}.quick-meta span{padding:7px 10px;border:1px solid rgba(255,255,255,.2);border-radius:8px;color:#d7e9df;font-size:.8rem}.feature-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:24px}.feature-intro{padding:34px;background:var(--green);color:#fff;border-radius:var(--radius)}.feature-intro p{color:#d3e8dd}.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.feature-row{padding:22px;border:1px solid var(--line);border-radius:var(--small-radius);background:var(--surface)}.feature-row p,.card p{color:var(--muted);font-size:.92rem;margin:0}.icon{display:grid;place-items:center;width:36px;height:36px;margin-bottom:13px;border-radius:10px;background:#edf6df;color:var(--green);font-weight:900}.preview{display:grid;grid-template-columns:1fr 1fr;gap:25px;align-items:center}.preview img{width:100%;height:310px;object-fit:cover;border-radius:18px}.caption{font-size:.78rem;color:var(--muted);margin-top:9px}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.step{padding:22px 18px;border-top:3px solid var(--gold);background:var(--surface);border-radius:0 0 14px 14px}.number{color:var(--green);font-size:1.8rem;font-weight:900}.scenarios{display:grid;grid-template-columns:1.2fr .8fr;gap:24px}.scenario-stack{display:grid;gap:10px}.scenario{display:flex;gap:15px;align-items:flex-start;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:14px}.scenario b{display:block}.checklist{background:#eef6ef;padding:30px;border-radius:var(--radius)}.checklist li{margin:12px 0;list-style:none}.checklist li:before{content:"✓";display:inline-grid;place-items:center;width:23px;height:23px;margin-right:10px;border-radius:50%;background:var(--green);color:#fff;font-weight:900}.demo{display:grid;grid-template-columns:.9fr 1.1fr;gap:25px;align-items:center;background:#1b302b;color:#fff;padding:35px;border-radius:var(--radius)}.demo p{color:#c6d9d0}.demo img{height:270px;width:100%;object-fit:cover;border-radius:14px}.outcomes{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.outcome{padding:24px;border-left:4px solid var(--green);background:var(--surface);border-radius:12px}.compare{display:grid;grid-template-columns:1fr 1fr;gap:16px}.compare .card{padding:25px}.compare ul{padding-left:20px;color:var(--muted)}.review-wall{display:flex;gap:16px;overflow:auto;padding-bottom:8px}.review{min-width:260px;padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:16px}.review q{display:block;font-size:1rem;font-weight:700;margin-bottom:15px}.voice-rail{display:flex;gap:10px;flex-wrap:wrap}.voice{padding:13px 17px;background:#fff;border:1px solid var(--line);border-radius:12px;color:var(--green-dark);font-weight:700}.updates{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}.post-feature{padding:28px;background:var(--green);color:#fff;border-radius:var(--radius)}.post-feature p{color:#d4e7dd}.post-list{display:grid;gap:10px}.post-item{padding:17px;background:#fff;border:1px solid var(--line);border-radius:12px}.post-item h3{font-size:1rem;margin:5px 0}.post-meta{font-size:.75rem;color:var(--muted);font-weight:700}.empty{padding:24px;border:1px dashed #b8cfc0;border-radius:14px;color:var(--muted)}.faq{display:grid;grid-template-columns:.7fr 1.3fr;gap:30px}.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;padding:17px 20px}.faq summary{cursor:pointer;font-weight:800;color:var(--green-dark)}.faq details p{color:var(--muted);margin:14px 0 0}.final-cta{padding:45px;background:var(--green-dark);color:#fff;border-radius:24px;display:flex;justify-content:space-between;align-items:center;gap:25px}.final-cta p{color:#c9ded4;margin:0}.site-footer{background:#102a24;color:#c7d9d0;padding:42px 0}.footer-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px}.site-footer .brand{color:#fff}.site-footer h3{color:#fff;font-size:1rem}.site-footer a{display:block;color:#c7d9d0;margin:7px 0;font-size:.9rem}.site-footer a:hover{color:var(--lime)}.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:30px;padding-top:20px;font-size:.78rem;color:#9eb8ad}
    @media(max-width:900px){.hero-grid,.feature-layout,.scenarios,.updates,.faq,.preview{grid-template-columns:1fr}.steps{grid-template-columns:1fr 1fr}.hero{padding:48px 0}.hero-art{min-height:280px}}
    @media(max-width:650px){.container{width:min(100% - 28px,var(--max))}.nav-panel{flex-wrap:wrap}.menu-toggle{display:block}.nav-links{display:none;order:3;width:100%;flex-direction:column;align-items:stretch}.nav-links.open{display:flex}.nav-links a{text-align:center}.nav-cta{padding:10px 12px;font-size:.8rem}h1{font-size:2.5rem}.section{padding:52px 0}.section-head{display:block}.section-head p{margin-top:10px}.quick-panel,.demo,.final-cta{display:block}.quick-panel .button-primary,.final-cta .button-primary{margin-top:20px;width:100%}.feature-list,.outcomes,.compare,.steps{grid-template-columns:1fr}.hero-actions a{width:100%}.device-card{right:7%;width:190px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}}

/* roulang page: article */
:root{
      --ink:#17221f;--muted:#687571;--paper:#f5f8f4;--surface:#ffffff;--surface-soft:#eef6ef;
      --line:#dce6df;--green:#146b52;--green-dark:#0b4538;--lime:#d6f36b;--gold:#f4b84a;
      --focus:#4c9cff;--success:#268764;--warning:#b67716;--shadow:0 18px 45px rgba(22,55,44,.10);
      --shadow-soft:0 9px 25px rgba(22,55,44,.07);--radius:20px;--small-radius:12px;
      --max:1180px;--ease:220ms ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;font-size:16px;line-height:1.68}
    ::selection{background:var(--lime);color:var(--green-dark)}
    a{color:var(--green);text-decoration:none;transition:color var(--ease),background var(--ease),transform var(--ease),box-shadow var(--ease)}
    a:hover{color:var(--green-dark)}
    img{display:block;max-width:100%;height:auto}
    button,a{touch-action:manipulation}
    button{font:inherit}
    button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
    h1,h2,h3,p{margin-top:0}
    h1,h2,h3{line-height:1.16;letter-spacing:-.035em;color:var(--ink)}
    h1{font-size:clamp(2.05rem,4.6vw,4.25rem);margin-bottom:22px}
    h2{font-size:clamp(1.55rem,2.6vw,2.4rem);margin-bottom:16px}
    h3{font-size:1.08rem;margin-bottom:8px}
    .container{width:min(var(--max),calc(100% - 40px));margin:auto}
    .site-header{padding:20px 0 10px}
    .nav-panel{display:flex;align-items:center;gap:12px;padding:12px 14px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
    .brand{display:flex;align-items:center;gap:10px;margin-right:auto;font-weight:850;font-size:1.25rem;letter-spacing:-.04em;color:var(--ink)}
    .brand:hover{color:var(--green-dark)}
    .brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--green);color:var(--lime);font-weight:900}
    .nav-links{display:flex;gap:7px;align-items:center}
    .nav-links a{padding:9px 12px;border:1px solid transparent;border-radius:10px;color:var(--muted);font-size:.86rem;font-weight:700}
    .nav-links a:hover,.nav-links a.active{background:#eef6ef;border-color:var(--line);color:var(--green-dark)}
    .nav-cta,.button-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--lime);color:var(--green-dark);font-weight:850;border:0;border-radius:11px;padding:12px 18px;box-shadow:0 7px 18px rgba(140,170,49,.2)}
    .nav-cta:hover,.button-primary:hover{background:#c6e85a;color:var(--green-dark);transform:translateY(-2px)}
    .button-primary:active,.nav-cta:active{transform:translateY(0)}
    .button-secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 17px;border:1px solid var(--green);border-radius:11px;color:var(--green-dark);font-weight:800;background:transparent}
    .button-secondary:hover{background:var(--green);color:#fff}
    .menu-toggle{display:none;background:transparent;border:1px solid var(--line);border-radius:10px;padding:8px 12px;color:var(--green-dark);font-weight:800}
    main{padding:22px 0 74px}
    .article-hero{position:relative;overflow:hidden;padding:58px 0 52px;border-radius:28px;background:linear-gradient(112deg,#e6f1e7 0%,#f9fcf7 57%,#d8ebe0 100%)}
    .article-hero:after{content:"";position:absolute;right:-95px;bottom:-145px;width:390px;height:390px;border:58px solid rgba(20,107,82,.09);border-radius:50%}
    .article-hero-inner{position:relative;z-index:1;max-width:890px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-size:.75rem;text-transform:uppercase;letter-spacing:.13em;font-weight:850}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--gold)}
    .breadcrumbs{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0 0 24px;font-size:.84rem;font-weight:750;color:var(--muted)}
    .breadcrumbs span:last-child{color:var(--green-dark)}
    .crumb-separator{color:#9daaa5}
    .article-summary{max-width:770px;font-size:1.1rem;color:var(--muted);margin-bottom:26px}
    .meta-row{display:flex;flex-wrap:wrap;gap:10px}
    .meta-chip{display:inline-flex;align-items:center;gap:7px;padding:8px 11px;background:rgba(255,255,255,.78);border:1px solid var(--line);border-radius:9px;font-size:.8rem;font-weight:780;color:var(--green-dark)}
    .meta-dot{width:7px;height:7px;background:var(--gold);border-radius:50%}
    .section{padding:66px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:26px}
    .section-head p{max-width:570px;color:var(--muted);margin-bottom:0}
    .lead-media{padding:12px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-soft)}
    .lead-media img{width:100%;height:370px;object-fit:cover;border-radius:14px}
    .caption{padding:13px 5px 2px;color:var(--muted);font-size:.82rem}
    .reading-layout{display:grid;grid-template-columns:minmax(0,790px) 250px;gap:42px;align-items:start}
    .article-content{padding:clamp(24px,4vw,50px);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-soft);font-size:1.04rem}
    .article-content > *:last-child{margin-bottom:0}
    .article-content h2{margin:42px 0 15px;font-size:clamp(1.45rem,2.4vw,2.1rem)}
    .article-content h3{margin:29px 0 10px;font-size:1.22rem}
    .article-content p{margin-bottom:20px;color:#33433e}
    .article-content ul,.article-content ol{margin:0 0 23px;padding-left:24px;color:#33433e}
    .article-content li{margin:8px 0;padding-left:4px}
    .article-content blockquote{margin:30px 0;padding:18px 22px;border-left:4px solid var(--gold);border-radius:0 13px 13px 0;background:#fff8e8;color:var(--green-dark);font-size:1.07rem;font-weight:650}
    .article-content img{margin:28px auto;border-radius:14px}
    .article-content table{width:100%;margin:26px 0;border-collapse:collapse;font-size:.94rem}
    .article-content th,.article-content td{padding:12px;border:1px solid var(--line);text-align:left}
    .article-content th{background:#eef6ef;color:var(--green-dark)}
    .reading-aside{position:sticky;top:18px}
    .aside-card{padding:22px;background:var(--green-dark);border-radius:var(--radius);color:#fff}
    .aside-card h3{color:#fff}
    .aside-card p{color:#c9ded4;font-size:.9rem}
    .aside-card .button-primary{width:100%;margin-top:9px}
    .article-nav{margin-top:18px;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:var(--small-radius)}
    .article-nav strong{display:block;margin-bottom:9px;color:var(--green-dark)}
    .article-nav a{display:block;padding:7px 0;font-size:.88rem;font-weight:700}
    .return-panel{display:grid;grid-template-columns:1fr .95fr;overflow:hidden;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-soft)}
    .return-panel-copy{padding:38px}
    .return-panel-copy p{color:var(--muted);max-width:510px}
    .return-panel-image{min-height:275px;background:url('/assets/images/backpic/back-4.jpg') center/cover}
    .return-panel-image:after{content:"";display:block;width:100%;height:100%;min-height:275px;background:linear-gradient(125deg,rgba(11,69,56,.25),rgba(11,69,56,.63))}
    .info-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .info-unit{padding:19px;background:#eef6ef;border:1px solid #d6e6d7;border-radius:var(--small-radius)}
    .info-unit span{display:block;margin-bottom:5px;color:var(--green);font-size:.73rem;text-transform:uppercase;letter-spacing:.09em;font-weight:850}
    .info-unit strong{font-size:.96rem;color:var(--green-dark)}
    .faq{display:grid;grid-template-columns:.72fr 1.28fr;gap:30px}
    .faq-copy p{color:var(--muted);max-width:365px}
    .faq details{background:var(--surface);border:1px solid var(--line);border-radius:12px;margin-bottom:10px;padding:17px 20px;box-shadow:0 5px 15px rgba(22,55,44,.03)}
    .faq summary{cursor:pointer;font-weight:800;color:var(--green-dark)}
    .faq details p{color:var(--muted);margin:14px 0 0}
    .final-cta{padding:45px;background:var(--green-dark);color:#fff;border-radius:24px;display:flex;justify-content:space-between;align-items:center;gap:25px}
    .final-cta h2{color:#fff;margin-bottom:8px}
    .final-cta p{color:#c9ded4;margin:0;max-width:650px}
    .empty-state{padding:48px;text-align:center;background:var(--surface);border:1px dashed #b5c8b9;border-radius:var(--radius)}
    .empty-state p{color:var(--muted)}
    .site-footer{background:#102a24;color:#c7d9d0;padding:42px 0}
    .footer-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px}
    .site-footer .brand{color:#fff}
    .site-footer h3{color:#fff;font-size:1rem;letter-spacing:0}
    .site-footer p{font-size:.9rem;max-width:315px}
    .site-footer a{display:block;color:#c7d9d0;margin:7px 0;font-size:.9rem}
    .site-footer a:hover{color:var(--lime)}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:30px;padding-top:20px;font-size:.78rem;color:#9eb8ad}
    @media(max-width:1024px){
      .reading-layout{grid-template-columns:minmax(0,1fr) 220px;gap:24px}
      .nav-links a{padding:8px 9px;font-size:.8rem}
    }
    @media(max-width:768px){
      .container{width:min(100% - 28px,var(--max))}
      .nav-panel{flex-wrap:wrap}
      .menu-toggle{display:block}
      .nav-links{display:none;order:3;width:100%;flex-direction:column;align-items:stretch}
      .nav-links.is-open{display:flex}
      .nav-links a{padding:11px 12px}
      .nav-cta{margin-left:auto;padding:10px 13px;font-size:.84rem}
      .article-hero{padding:42px 0}
      .section{padding:48px 0}
      .lead-media img{height:275px}
      .reading-layout,.return-panel,.faq{grid-template-columns:1fr}
      .reading-aside{position:static;display:grid;grid-template-columns:1fr 1fr;gap:12px}
      .article-nav{margin-top:0}
      .return-panel-image{min-height:225px;grid-row:1}
      .return-panel-image:after{min-height:225px}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media(max-width:520px){
      body{font-size:15px}
      .site-header{padding-top:14px}
      .brand{font-size:1.13rem}
      .brand-mark{width:34px;height:34px}
      .nav-cta{width:100%;order:2}
      .menu-toggle{margin-left:auto}
      h1{font-size:2.05rem}
      .article-summary{font-size:1rem}
      .article-content{padding:23px 19px;font-size:1rem}
      .article-content h2{margin-top:33px}
      .lead-media img{height:205px}
      .reading-aside,.info-strip,.footer-grid{grid-template-columns:1fr}
      .section-head{display:block}
      .section-head p{margin-top:10px}
      .return-panel-copy{padding:28px 23px}
      .final-cta{padding:30px 24px;display:block}
      .final-cta .button-primary{width:100%;margin-top:20px}
      .meta-chip{font-size:.75rem}
    }

/* roulang page: category1 */
:root{--ink:#17221f;--muted:#687571;--paper:#f5f8f4;--surface:#fff;--line:#dce6df;--green:#146b52;--green-dark:#0b4538;--lime:#d6f36b;--gold:#f4b84a;--focus:#4c9cff;--shadow:0 18px 45px rgba(22,55,44,.1);--radius:20px;--small-radius:12px;--max:1180px;--ease:220ms ease}
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;line-height:1.65}::selection{background:var(--lime);color:var(--green-dark)}a{color:var(--green);text-decoration:none;transition:var(--ease)}a:hover{color:var(--green-dark)}a:focus,button:focus{outline:3px solid rgba(76,156,255,.45);outline-offset:3px}img{display:block;max-width:100%;height:auto}.container{width:min(var(--max),calc(100% - 40px));margin:auto}
    .site-header{padding:20px 0 10px}.nav-panel{display:flex;align-items:center;gap:12px;padding:12px 14px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}.brand{display:flex;align-items:center;gap:10px;margin-right:auto;font-weight:850;font-size:1.25rem;letter-spacing:-.04em;color:var(--ink)}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--green);color:var(--lime);font-weight:900}.nav-links{display:flex;gap:7px;align-items:center}.nav-links a{padding:9px 12px;border:1px solid transparent;border-radius:10px;color:var(--muted);font-size:.86rem;font-weight:700}.nav-links a:hover,.nav-links a.active{background:#eef6ef;border-color:var(--line);color:var(--green-dark)}.nav-cta,.button-primary{display:inline-flex;align-items:center;justify-content:center;background:var(--lime);color:var(--green-dark);font-weight:850;border:0;border-radius:11px;padding:12px 18px;box-shadow:0 7px 18px rgba(140,170,49,.2)}.nav-cta:hover,.button-primary:hover{background:#c6e85a;color:var(--green-dark);transform:translateY(-2px)}.button-secondary{display:inline-flex;align-items:center;justify-content:center;padding:11px 17px;border:1px solid var(--green);border-radius:11px;color:var(--green-dark);font-weight:800}.button-secondary:hover{background:var(--green);color:#fff}.menu-toggle{display:none;background:transparent;border:1px solid var(--line);border-radius:10px;padding:8px 12px;color:var(--green-dark);font-weight:800}
    .category-intro{margin-top:30px;padding:54px 0;background:#e8f4e9;border-radius:28px}.intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}.eyebrow,.kicker{display:inline-flex;align-items:center;gap:7px;color:var(--green);font-size:.75rem;text-transform:uppercase;letter-spacing:.13em;font-weight:850}.eyebrow:before{content:"";width:24px;height:2px;background:var(--gold)}h1{font-size:clamp(2.3rem,5vw,4.4rem);line-height:1.05;letter-spacing:-.065em;margin:15px 0 20px}h2{font-size:clamp(1.7rem,3vw,2.5rem);line-height:1.15;letter-spacing:-.045em;margin:0 0 12px}h3{line-height:1.25;margin:0 0 8px}.intro-copy p{font-size:1.08rem;color:var(--muted);max-width:650px}.intro-art{min-height:285px;border-radius:22px;background:url('/assets/images/backpic/back-3.png') center/cover;position:relative;overflow:hidden}.intro-art:after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(11,69,56,.82),rgba(11,69,56,.16))}.art-note{position:absolute;z-index:1;left:24px;bottom:24px;max-width:230px;color:#fff}.art-note strong{font-size:1.45rem;display:block}.section{padding:70px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}.section-head p{max-width:570px;color:var(--muted);margin:0}.panel,.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(22,55,44,.05)}.badge{display:inline-block;padding:5px 9px;border-radius:8px;background:#edf6df;color:var(--green-dark);font-size:.72rem;font-weight:850;text-transform:uppercase;letter-spacing:.08em}.download-panel{display:grid;grid-template-columns:1fr auto;align-items:center;gap:25px;padding:28px 32px;background:var(--green-dark);color:#fff}.download-panel p{color:#c9ded4;margin:5px 0 0}.download-panel .badge{background:rgba(214,243,107,.16);color:var(--lime)}.download-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.download-meta span{padding:7px 10px;border:1px solid rgba(255,255,255,.2);border-radius:8px;color:#d7e9df;font-size:.8rem}.guide-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:24px}.guide-side{padding:30px;background:var(--green);color:#fff;border-radius:var(--radius)}.guide-side p{color:#d3e8dd}.guide-list{display:grid;gap:12px}.guide-item{display:grid;grid-template-columns:44px 1fr;gap:15px;padding:22px;border:1px solid var(--line);border-radius:var(--small-radius);background:#fff}.step-number{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--lime);color:var(--green-dark);font-weight:900}.guide-item p,.card p{color:var(--muted);font-size:.92rem;margin:0}.device-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.device-card{overflow:hidden}.device-card img{width:100%;height:190px;object-fit:cover}.device-card div{padding:20px}.checklist{padding:30px;background:#eef6ef;border-radius:var(--radius)}.checklist ul{margin:18px 0 0;padding:0}.checklist li{margin:13px 0;list-style:none}.checklist li:before{content:"✓";display:inline-grid;place-items:center;width:23px;height:23px;margin-right:10px;border-radius:50%;background:var(--green);color:#fff;font-weight:900}.note-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.note-card{padding:24px}.note-card .kicker{margin-bottom:15px}.faq{display:grid;grid-template-columns:.75fr 1.25fr;gap:30px}.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;padding:17px 20px}.faq summary{cursor:pointer;font-weight:800;color:var(--green-dark)}.faq details p{color:var(--muted);margin:14px 0 0}.final-cta{padding:42px;background:var(--green-dark);color:#fff;border-radius:24px;display:flex;justify-content:space-between;align-items:center;gap:25px}.final-cta p{color:#c9ded4;margin:0}.site-footer{background:#102a24;color:#c7d9d0;padding:42px 0}.footer-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px}.site-footer .brand{color:#fff}.site-footer h3{color:#fff;font-size:1rem}.site-footer a{display:block;color:#c7d9d0;margin:7px 0;font-size:.9rem}.site-footer a:hover{color:var(--lime)}.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:30px;padding-top:20px;font-size:.78rem;color:#9eb8ad}
    @media(max-width:900px){.intro-grid,.guide-layout,.faq{grid-template-columns:1fr}.intro-art{min-height:240px}.note-grid{grid-template-columns:1fr 1fr}}
    @media(max-width:680px){.container{width:min(100% - 28px,var(--max))}.nav-panel{flex-wrap:wrap}.menu-toggle{display:block}.nav-links{display:none;order:3;width:100%;flex-direction:column;align-items:stretch}.nav-links.open{display:flex}.nav-links a{text-align:center}.nav-cta{margin-left:auto}.category-intro{padding:38px 0}.section{padding:50px 0}.download-panel,.final-cta{grid-template-columns:1fr;display:grid;padding:25px}.device-grid,.note-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:20px}h1{font-size:2.55rem}}

/* roulang page: category2 */
:root{--ink:#17221f;--muted:#687571;--paper:#f5f8f4;--surface:#fff;--line:#dce6df;--green:#146b52;--green-dark:#0b4538;--lime:#d6f36b;--gold:#f4b84a;--focus:#4c9cff;--shadow:0 18px 45px rgba(22,55,44,.10);--shadow-soft:0 8px 24px rgba(22,55,44,.05);--radius:20px;--small-radius:12px;--max:1180px;--ease:220ms ease}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;line-height:1.65}
    ::selection{background:var(--lime);color:var(--green-dark)}
    a{color:var(--green);text-decoration:none;transition:var(--ease)}
    a:hover{color:var(--green-dark)}
    img{display:block;max-width:100%;height:auto}
    button,a{touch-action:manipulation}
    button{font:inherit}
    button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
    h1,h2,h3,p{margin-top:0}
    h1,h2,h3{line-height:1.15;letter-spacing:-.035em;color:var(--ink)}
    h1{font-size:clamp(2.25rem,4.5vw,4.45rem);margin-bottom:21px}
    h2{font-size:clamp(1.65rem,3vw,2.55rem);margin-bottom:14px}
    h3{font-size:1.1rem;margin-bottom:8px}
    .container{width:min(var(--max),calc(100% - 40px));margin:auto}
    .site-header{padding:20px 0 10px}
    .nav-panel{display:flex;align-items:center;gap:12px;padding:12px 14px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
    .brand{display:flex;align-items:center;gap:10px;margin-right:auto;font-weight:850;font-size:1.25rem;letter-spacing:-.04em;color:var(--ink)}
    .brand:hover{color:var(--green-dark)}
    .brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--green);color:var(--lime);font-weight:900}
    .nav-links{display:flex;gap:7px;align-items:center}
    .nav-links a{padding:9px 12px;border:1px solid transparent;border-radius:10px;color:var(--muted);font-size:.86rem;font-weight:700}
    .nav-links a:hover,.nav-links a.active{background:#eef6ef;border-color:var(--line);color:var(--green-dark)}
    .nav-cta,.button-primary{display:inline-flex;align-items:center;justify-content:center;background:var(--lime);color:var(--green-dark);font-weight:850;border:0;border-radius:11px;padding:12px 18px;box-shadow:0 7px 18px rgba(140,170,49,.2);cursor:pointer}
    .nav-cta:hover,.button-primary:hover{background:#c6e85a;color:var(--green-dark);transform:translateY(-2px)}
    .nav-cta:active,.button-primary:active{transform:translateY(0)}
    .button-secondary{display:inline-flex;align-items:center;justify-content:center;padding:11px 17px;border:1px solid var(--green);border-radius:11px;color:var(--green-dark);font-weight:800;background:transparent}
    .button-secondary:hover{background:var(--green);color:#fff}
    .menu-toggle{display:none;background:transparent;border:1px solid var(--line);border-radius:10px;padding:8px 12px;color:var(--green-dark);font-weight:800;cursor:pointer}
    main{padding:16px 0 72px}
    .section{padding:43px 0}
    .eyebrow,.kicker{display:inline-flex;align-items:center;gap:7px;color:var(--green);font-size:.75rem;text-transform:uppercase;letter-spacing:.13em;font-weight:850}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--gold)}
    .lead{font-size:1.08rem;color:var(--muted);max-width:680px}
    .panel,.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-soft)}
    .badge{display:inline-block;padding:5px 9px;border-radius:8px;background:#edf6df;color:var(--green-dark);font-size:.72rem;font-weight:850;text-transform:uppercase;letter-spacing:.08em}
    .category-banner{position:relative;overflow:hidden;padding:60px 0 56px;margin-top:18px;border-radius:28px;background:#e8f4e9}
    .category-banner:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(232,244,233,.98) 0%,rgba(232,244,233,.86) 47%,rgba(16,63,51,.18) 100%),url('/assets/images/backpic/back-4.jpg') center/cover}
    .banner-content{position:relative;max-width:730px}
    .banner-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:27px}
    .fact-strip{display:flex;flex-wrap:wrap;gap:10px;margin-top:25px}
    .fact-strip span{padding:8px 12px;border:1px solid #cbdcd1;border-radius:9px;background:rgba(255,255,255,.65);color:var(--green-dark);font-size:.82rem;font-weight:750}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:27px}
    .section-head p{max-width:550px;color:var(--muted);margin:0}
    .access-map{display:grid;grid-template-columns:.82fr 1.18fr;gap:24px}
    .map-side{padding:31px;background:var(--green);color:#fff;border-radius:var(--radius)}
    .map-side h2{color:#fff}
    .map-side p{color:#d5e8de}
    .map-stat{border-top:1px solid rgba(255,255,255,.19);padding-top:18px;margin-top:22px;display:grid;gap:14px}
    .map-stat strong{display:block;color:var(--lime);font-size:1.05rem}
    .map-stat span{font-size:.86rem;color:#d5e8de}
    .feature-rail{display:grid;gap:12px}
    .feature-row{display:grid;grid-template-columns:50px 1fr auto;align-items:center;gap:17px;padding:20px 22px;border:1px solid var(--line);border-radius:var(--small-radius);background:var(--surface);transition:var(--ease)}
    .feature-row:hover{border-color:#b9d1c0;box-shadow:var(--shadow-soft);transform:translateX(3px)}
    .feature-icon{display:grid;place-items:center;width:46px;height:46px;border-radius:13px;background:#edf6df;color:var(--green-dark);font-weight:900;font-size:1.1rem}
    .feature-row p{margin:0;color:var(--muted);font-size:.91rem}
    .feature-num{font-size:.78rem;font-weight:850;color:var(--green);letter-spacing:.08em}
    .media-layout{display:grid;grid-template-columns:1.08fr .92fr;gap:28px;align-items:center}
    .image-frame{position:relative;padding:13px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .image-frame img{width:100%;height:355px;object-fit:cover;border-radius:13px}
    .image-caption{margin:13px 4px 2px;color:var(--muted);font-size:.82rem}
    .access-notes{display:grid;gap:13px}
    .note-card{padding:19px 20px;border-left:4px solid var(--gold);background:#fffdf7;border-radius:0 var(--small-radius) var(--small-radius) 0}
    .note-card h3{color:var(--green-dark)}
    .note-card p{margin:0;color:var(--muted);font-size:.92rem}
    .mobile-path{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .path-step{position:relative;padding:24px 20px;background:#fff;border:1px solid var(--line);border-radius:var(--small-radius)}
    .path-step:not(:last-child):after{content:"";position:absolute;width:18px;height:2px;right:-17px;top:50%;background:#a8c6ae}
    .step-number{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--green);color:#fff;font-weight:900;font-size:.84rem;margin-bottom:18px}
    .path-step p{margin:0;color:var(--muted);font-size:.89rem}
    .scenario-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px}
    .scenario-main{position:relative;min-height:365px;overflow:hidden;border-radius:var(--radius);background:var(--green-dark)}
    .scenario-main img{width:100%;height:365px;object-fit:cover;opacity:.7}
    .scenario-copy{position:absolute;inset:auto 0 0 0;padding:28px;background:linear-gradient(transparent,rgba(11,69,56,.97));color:#fff}
    .scenario-copy h2{color:#fff;margin-bottom:8px}
    .scenario-copy p{margin:0;color:#d7e9df}
    .scenario-list{display:grid;gap:12px}
    .scenario-card{padding:20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--small-radius)}
    .scenario-card p{margin:0;color:var(--muted);font-size:.91rem}
    .scenario-card strong{display:block;color:var(--green-dark);margin-bottom:5px}
    .check-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:24px;align-items:start}
    .checklist{padding:29px;background:#eef6ef;border-radius:var(--radius)}
    .checklist h2{font-size:1.65rem}
    .checklist ul{padding:0;margin:17px 0 0}
    .checklist li{margin:13px 0;list-style:none;color:var(--ink)}
    .checklist li:before{content:"✓";display:inline-grid;place-items:center;width:23px;height:23px;margin-right:10px;border-radius:50%;background:var(--green);color:#fff;font-weight:900;font-size:.78rem}
    .compatibility{padding:28px}
    .compatibility p{color:var(--muted)}
    .device-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
    .device-tags span{padding:9px 12px;border-radius:9px;background:#f3f7f3;border:1px solid var(--line);color:var(--green-dark);font-size:.83rem;font-weight:750}
    .faq{display:grid;grid-template-columns:.72fr 1.28fr;gap:30px}
    .faq-intro{padding:28px;background:#f0f6ec;border-radius:var(--radius)}
    .faq-intro p{color:var(--muted);margin-bottom:0}
    .faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;padding:17px 20px}
    .faq summary{cursor:pointer;font-weight:800;color:var(--green-dark);padding-right:25px}
    .faq details p{color:var(--muted);margin:14px 0 0;font-size:.93rem}
    .final-cta{padding:43px;background:var(--green-dark);color:#fff;border-radius:24px;display:flex;justify-content:space-between;align-items:center;gap:25px}
    .final-cta h2{color:#fff;margin-bottom:8px}
    .final-cta p{color:#c9ded4;margin:0;max-width:650px}
    .site-footer{background:#102a24;color:#c7d9d0;padding:42px 0}
    .footer-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px}
    .site-footer .brand{color:#fff}
    .site-footer h3{color:#fff;font-size:1rem}
    .site-footer p{font-size:.9rem;margin:12px 0 0;max-width:310px}
    .site-footer a{display:block;color:#c7d9d0;margin:7px 0;font-size:.9rem}
    .site-footer a:hover{color:var(--lime)}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:30px;padding-top:20px;font-size:.78rem;color:#9eb8ad}
    @media(max-width:1024px){
      .nav-links a{padding:8px 9px;font-size:.8rem}
      .mobile-path{grid-template-columns:1fr 1fr}
      .path-step:nth-child(2):after{display:none}
    }
    @media(max-width:768px){
      .container{width:min(100% - 28px,var(--max))}
      .nav-panel{flex-wrap:wrap}
      .menu-toggle{display:block}
      .nav-links{display:none;order:3;width:100%;flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}
      .nav-links a{padding:11px 12px}
      .nav-cta{margin-left:auto;padding:10px 13px;font-size:.82rem}
      .category-banner{padding:45px 0}
      .access-map,.media-layout,.scenario-grid,.check-grid,.faq{grid-template-columns:1fr}
      .feature-row{grid-template-columns:45px 1fr}
      .feature-num{display:none}
      .mobile-path{grid-template-columns:1fr 1fr}
      .section{padding:33px 0}
      .section-head{display:block}
      .section-head p{margin-top:10px}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media(max-width:520px){
      h1{font-size:2.35rem}
      .site-header{padding-top:12px}
      .brand{font-size:1.12rem}
      .brand-mark{width:34px;height:34px}
      .nav-cta{width:100%;order:2}
      .menu-toggle{margin-left:auto}
      .category-banner{border-radius:21px}
      .banner-actions,.final-cta{align-items:stretch;flex-direction:column}
      .banner-actions a,.final-cta a{width:100%}
      .feature-row{padding:17px}
      .mobile-path{grid-template-columns:1fr}
      .path-step:after{display:none}
      .image-frame img{height:260px}
      .scenario-main,.scenario-main img{min-height:310px;height:310px}
      .footer-grid{grid-template-columns:1fr}
      .final-cta{padding:30px 24px}
    }

/* roulang page: category3 */
:root{--ink:#17221f;--muted:#687571;--paper:#f5f8f4;--surface:#fff;--line:#dce6df;--green:#146b52;--green-dark:#0b4538;--lime:#d6f36b;--gold:#f4b84a;--focus:#4c9cff;--shadow:0 18px 45px rgba(22,55,44,.10);--radius:20px;--small-radius:12px;--max:1180px;--ease:220ms ease}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;line-height:1.65}
    a{color:var(--green);text-decoration:none;transition:var(--ease)}
    a:hover{color:var(--green-dark)}
    a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
    img{display:block;max-width:100%;height:auto}
    button,a{touch-action:manipulation}
    ::selection{background:var(--lime);color:var(--green-dark)}
    .container{width:min(var(--max),calc(100% - 40px));margin:auto}
    .site-header{padding:20px 0 10px}
    .nav-panel{display:flex;align-items:center;gap:12px;padding:12px 14px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
    .brand{display:flex;align-items:center;gap:10px;margin-right:auto;font-weight:850;font-size:1.25rem;letter-spacing:-.04em;color:var(--ink)}
    .brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--green);color:var(--lime);font-weight:900}
    .nav-links{display:flex;gap:7px;align-items:center}
    .nav-links a{padding:9px 12px;border:1px solid transparent;border-radius:10px;color:var(--muted);font-size:.86rem;font-weight:700}
    .nav-links a:hover,.nav-links a.active{background:#eef6ef;border-color:var(--line);color:var(--green-dark)}
    .nav-cta,.button-primary{display:inline-flex;align-items:center;justify-content:center;background:var(--lime);color:var(--green-dark);font-weight:850;border:0;border-radius:11px;padding:12px 18px;box-shadow:0 7px 18px rgba(140,170,49,.2)}
    .nav-cta:hover,.button-primary:hover{background:#c6e85a;color:var(--green-dark);transform:translateY(-2px)}
    .button-secondary{display:inline-flex;align-items:center;justify-content:center;padding:11px 17px;border:1px solid var(--green);border-radius:11px;color:var(--green-dark);font-weight:800}
    .button-secondary:hover{background:var(--green);color:#fff}
    .menu-toggle{display:none;background:transparent;border:1px solid var(--line);border-radius:10px;padding:8px 12px;color:var(--green-dark);font-weight:800}
    main{padding:20px 0 72px}
    .category-intro{padding:48px 0 35px;border-bottom:1px solid var(--line)}
    .intro-grid{display:grid;grid-template-columns:1fr .8fr;gap:60px;align-items:end}
    .eyebrow,.kicker{display:inline-flex;align-items:center;gap:7px;color:var(--green);font-size:.75rem;text-transform:uppercase;letter-spacing:.13em;font-weight:850}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--gold)}
    h1,h2,h3{line-height:1.15;letter-spacing:-.035em}
    h1{font-size:clamp(2.5rem,5vw,4.7rem);margin:14px 0 18px;max-width:760px}
    h2{font-size:clamp(1.8rem,3vw,2.65rem);margin:0 0 12px}
    h3{font-size:1.15rem;margin:0 0 8px}
    .category-intro p{font-size:1.08rem;color:var(--muted);max-width:680px;margin:0}
    .intro-note{padding:25px;background:var(--green);color:#fff;border-radius:var(--radius);box-shadow:var(--shadow)}
    .intro-note strong{display:block;font-size:1.8rem;color:var(--lime);margin-bottom:7px}
    .intro-note p{color:#d3e8dd;font-size:.94rem}
    .section{padding:70px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}
    .section-head p{max-width:570px;color:var(--muted);margin:0}
    .panel,.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(22,55,44,.05)}
    .guide-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:24px}
    .guide-index{padding:30px;background:#eaf4e9;border-radius:var(--radius)}
    .guide-index span{display:block;color:var(--muted);font-size:.82rem;font-weight:800;margin:13px 0}
    .guide-index span strong{color:var(--green);font-size:1.1rem;margin-right:8px}
    .guide-body{padding:32px}
    .guide-body p{color:var(--muted)}
    .guide-body ul{margin:18px 0 0;padding-left:20px}
    .guide-body li{margin:9px 0}
    .feature-rows{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .feature-row{padding:23px;border:1px solid var(--line);border-radius:var(--small-radius);background:var(--surface);transition:var(--ease)}
    .feature-row:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .badge{display:inline-block;padding:5px 9px;border-radius:8px;background:#edf6df;color:var(--green-dark);font-size:.72rem;font-weight:850;text-transform:uppercase;letter-spacing:.08em;margin-bottom:15px}
    .feature-row p,.scenario p,.support-card p{color:var(--muted);font-size:.92rem;margin:0}
    .device-section{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:center}
    .device-section img{width:100%;height:360px;object-fit:cover;border-radius:18px}
    .device-copy{padding:18px 0 18px 20px}
    .device-copy ul{padding-left:20px;color:var(--muted)}
    .device-copy li{margin:12px 0}
    .timeline{position:relative;display:grid;gap:14px}
    .timeline:before{content:"";position:absolute;left:25px;top:25px;bottom:25px;width:2px;background:#c8ddcd}
    .timeline-item{position:relative;display:grid;grid-template-columns:52px 1fr;gap:16px;align-items:start}
    .step-number{display:grid;place-items:center;width:52px;height:52px;border-radius:15px;background:var(--green);color:var(--lime);font-weight:900;z-index:1}
    .scenario{padding:22px 25px;background:#fff;border:1px solid var(--line);border-radius:var(--small-radius)}
    .scenario h3{margin-bottom:6px}
    .support-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px}
    .checklist{padding:30px;background:#eef6ef;border-radius:var(--radius)}
    .checklist ul{margin:0;padding:0}
    .checklist li{margin:13px 0;list-style:none;color:var(--green-dark);font-weight:700}
    .checklist li:before{content:"✓";display:inline-grid;place-items:center;width:23px;height:23px;margin-right:10px;border-radius:50%;background:var(--green);color:#fff;font-weight:900}
    .support-card{padding:30px}
    .support-card strong{display:block;font-size:2rem;color:var(--green-dark);margin-bottom:8px}
    .faq{display:grid;grid-template-columns:.7fr 1.3fr;gap:30px}
    .faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;padding:17px 20px}
    .faq summary{cursor:pointer;font-weight:800;color:var(--green-dark)}
    .faq details p{color:var(--muted);margin:14px 0 0}
    .final-cta{padding:42px;display:flex;justify-content:space-between;align-items:center;gap:25px;background:var(--green-dark);color:#fff;border-radius:24px}
    .final-cta p{color:#c9ded4;margin:0;max-width:650px}
    .site-footer{background:#102a24;color:#c7d9d0;padding:42px 0}
    .footer-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px}
    .site-footer .brand{color:#fff}
    .site-footer h3{color:#fff;font-size:1rem}
    .site-footer a{display:block;color:#c7d9d0;margin:7px 0;font-size:.9rem}
    .site-footer a:hover{color:var(--lime)}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:30px;padding-top:20px;font-size:.78rem;color:#9eb8ad}
    @media(max-width:1024px){.intro-grid{gap:30px}.section{padding:55px 0}}
    @media(max-width:768px){
      .container{width:min(100% - 28px,var(--max))}
      .nav-panel{flex-wrap:wrap}
      .menu-toggle{display:block}
      .nav-links{display:none;order:3;width:100%;flex-direction:column;align-items:stretch}
      .nav-links.is-open{display:flex}
      .nav-links a{text-align:left}
      .nav-cta{font-size:.85rem;padding:10px 13px}
      .intro-grid,.guide-layout,.device-section,.support-grid,.faq{grid-template-columns:1fr}
      .category-intro{padding-top:28px}
      .device-copy{padding:0}
      .feature-rows{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
      .final-cta{align-items:flex-start;flex-direction:column;padding:30px}
    }
    @media(max-width:520px){
      h1{font-size:2.45rem}
      .section{padding:44px 0}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .guide-body,.support-card,.checklist{padding:23px}
      .device-section img{height:250px}
      .final-cta .button-primary{width:100%}
    }

/* roulang page: category4 */
:root{--ink:#17221f;--muted:#687571;--paper:#f5f8f4;--surface:#fff;--line:#dce6df;--green:#146b52;--green-dark:#0b4538;--lime:#d6f36b;--gold:#f4b84a;--focus:#4c9cff;--shadow:0 18px 45px rgba(22,55,44,.10);--radius:20px;--small-radius:12px;--max:1180px;--ease:220ms ease}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;line-height:1.65}
    ::selection{background:var(--lime);color:var(--green-dark)}
    a{color:var(--green);text-decoration:none;transition:var(--ease)}
    a:hover{color:var(--green-dark)}
    a:focus-visible,button:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
    img{display:block;max-width:100%;height:auto}
    button,a{touch-action:manipulation}
    h1,h2,h3{line-height:1.16;letter-spacing:-.035em;margin-top:0}
    h1{font-size:clamp(2.35rem,5vw,4.6rem);margin-bottom:20px}
    h2{font-size:clamp(1.7rem,3vw,2.6rem)}
    h3{font-size:1.15rem}
    .container{width:min(var(--max),calc(100% - 40px));margin:auto}
    .site-header{padding:20px 0 10px}
    .nav-panel{display:flex;align-items:center;gap:12px;padding:12px 14px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
    .brand{display:flex;align-items:center;gap:10px;margin-right:auto;font-weight:850;font-size:1.25rem;letter-spacing:-.04em;color:var(--ink)}
    .brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--green);color:var(--lime);font-weight:900}
    .nav-links{display:flex;gap:7px;align-items:center}
    .nav-links a{padding:9px 12px;border:1px solid transparent;border-radius:10px;color:var(--muted);font-size:.86rem;font-weight:700}
    .nav-links a:hover,.nav-links a.active{background:#eef6ef;border-color:var(--line);color:var(--green-dark)}
    .nav-cta,.button-primary{display:inline-flex;align-items:center;justify-content:center;background:var(--lime);color:var(--green-dark);font-weight:850;border:0;border-radius:11px;padding:12px 18px;box-shadow:0 7px 18px rgba(140,170,49,.2)}
    .nav-cta:hover,.button-primary:hover{background:#c6e85a;color:var(--green-dark);transform:translateY(-2px)}
    .button-secondary{display:inline-flex;align-items:center;justify-content:center;padding:11px 17px;border:1px solid var(--green);border-radius:11px;color:var(--green-dark);font-weight:800}
    .button-secondary:hover{background:var(--green);color:#fff}
    .menu-toggle{display:none;background:transparent;border:1px solid var(--line);border-radius:10px;padding:8px 12px;color:var(--green-dark);font-weight:800}
    main{padding:12px 0 70px}
    .category-banner{margin-top:28px;padding:64px 0 58px;background:linear-gradient(110deg,#e8f4e9,#f7fbf4 58%,#dcefe1);border-radius:28px;overflow:hidden}
    .banner-grid{display:grid;grid-template-columns:1fr .85fr;gap:48px;align-items:center}
    .eyebrow,.kicker{display:inline-flex;align-items:center;gap:7px;color:var(--green);font-size:.75rem;text-transform:uppercase;letter-spacing:.13em;font-weight:850}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--gold)}
    .category-banner p{font-size:1.08rem;color:var(--muted);max-width:650px}
    .banner-image{height:300px;border-radius:22px;overflow:hidden;box-shadow:var(--shadow)}
    .banner-image img{width:100%;height:100%;object-fit:cover}
    .section{padding:76px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}
    .section-head p{max-width:590px;color:var(--muted);margin:0}
    .panel,.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(22,55,44,.05)}
    .badge{display:inline-block;padding:5px 9px;border-radius:8px;background:#edf6df;color:var(--green-dark);font-size:.72rem;font-weight:850;text-transform:uppercase;letter-spacing:.08em}
    .update-board{display:grid;grid-template-columns:.8fr 1.2fr;gap:24px}
    .board-intro{padding:34px;background:var(--green);color:#fff;border-radius:var(--radius)}
    .board-intro p{color:#d3e8dd}
    .info-stack{display:grid;gap:12px}
    .info-row{display:flex;gap:18px;align-items:flex-start;padding:22px;border:1px solid var(--line);border-radius:14px;background:#fff}
    .info-icon{display:grid;place-items:center;flex:0 0 38px;height:38px;border-radius:11px;background:#edf6df;color:var(--green-dark);font-weight:900}
    .info-row p,.card p{color:var(--muted);font-size:.93rem;margin:0}
    .signal-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .signal-card{padding:25px}
    .signal-card strong{display:block;font-size:2rem;color:var(--green-dark);margin:12px 0 3px}
    .image-panel{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:center}
    .image-panel img{width:100%;height:300px;object-fit:cover;border-radius:18px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline-item{position:relative;padding:25px 20px 22px;background:#eef6ef;border-radius:15px;border:1px solid var(--line)}
    .timeline-item span{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--green);color:#fff;font-weight:900;margin-bottom:18px}
    .checklist{display:grid;grid-template-columns:1fr 1fr;gap:0 24px;background:#eef6ef;padding:30px;border-radius:var(--radius)}
    .checklist li{margin:12px 0;list-style:none;color:var(--green-dark);font-weight:700}
    .checklist li:before{content:"✓";display:inline-grid;place-items:center;width:23px;height:23px;margin-right:10px;border-radius:50%;background:var(--green);color:#fff;font-weight:900}
    .faq{display:grid;grid-template-columns:.7fr 1.3fr;gap:30px}
    .faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;padding:17px 20px}
    .faq summary{cursor:pointer;font-weight:800;color:var(--green-dark)}
    .faq details p{color:var(--muted);margin:14px 0 0}
    .final-cta{padding:45px;background:var(--green-dark);color:#fff;border-radius:24px;display:flex;justify-content:space-between;align-items:center;gap:25px}
    .final-cta p{color:#c9ded4;margin:0}
    .site-footer{background:#102a24;color:#c7d9d0;padding:42px 0}
    .footer-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px}
    .site-footer .brand{color:#fff}
    .site-footer h3{color:#fff;font-size:1rem}
    .site-footer a{display:block;color:#c7d9d0;margin:7px 0;font-size:.9rem}
    .site-footer a:hover{color:var(--lime)}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:30px;padding-top:20px;font-size:.78rem;color:#9eb8ad}
    @media(max-width:1024px){.banner-grid,.update-board,.image-panel{grid-template-columns:1fr}.timeline{grid-template-columns:repeat(2,1fr)}}
    @media(max-width:768px){.container{width:min(100% - 28px,var(--max))}.menu-toggle{display:block}.nav-links{display:none;order:3;width:100%;flex-direction:column;align-items:stretch}.nav-links.open{display:flex}.nav-links a{text-align:center}.nav-cta{font-size:.82rem;padding:10px 12px}.category-banner{padding:48px 0}.signal-grid{grid-template-columns:1fr}.faq{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.section{padding:58px 0}}
    @media(max-width:520px){h1{font-size:2.35rem}.banner-image{height:220px}.timeline,.checklist,.footer-grid{grid-template-columns:1fr}.section-head{display:block}.section-head p{margin-top:12px}.final-cta{display:block;padding:30px}.final-cta .button-primary{width:100%;margin-top:20px}.nav-panel{align-items:center}}