/* roulang page: index */
:root{
            --teal-950:#093b3a;
            --teal-900:#0b4d49;
            --teal-800:#0d625a;
            --teal-700:#16776b;
            --teal-100:#dff1eb;
            --teal-50:#eef8f4;
            --orange:#ed8b3a;
            --orange-dark:#ca6b25;
            --ink:#18302e;
            --muted:#6b7d79;
            --soft:#f5f7f4;
            --sand:#fbfaf6;
            --white:#ffffff;
            --line:#dce8e2;
            --shadow:0 16px 38px rgba(15,67,61,.09);
            --shadow-sm:0 7px 20px rgba(15,67,61,.07);
            --radius:18px;
            --radius-sm:11px;
            --container:1180px;
        }
        *{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth}
        body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--sand);line-height:1.7;font-size:15px}
        a{color:inherit;text-decoration:none}
        img{display:block;max-width:100%}
        button,input,textarea{font:inherit}
        button{cursor:pointer;border:0}
        ul{list-style:none}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .topbar{height:76px;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
        .nav-wrap{height:76px;display:flex;align-items:center;gap:34px}
        .brand{display:inline-flex;align-items:center;gap:11px;white-space:nowrap;font-weight:800;font-size:20px;letter-spacing:-.03em;color:var(--teal-900)}
        .brand-mark{width:34px;height:34px;border-radius:10px;background:var(--teal-800);display:grid;place-items:center;color:#fff;position:relative;overflow:hidden}
        .brand-mark:before,.brand-mark:after{content:"";position:absolute;border:2px solid rgba(255,255,255,.75);border-radius:50%}
        .brand-mark:before{width:22px;height:10px;transform:rotate(35deg)}
        .brand-mark:after{width:10px;height:22px;transform:rotate(35deg)}
        .main-nav{display:flex;align-items:center;gap:5px;margin-left:auto}
        .main-nav a{padding:9px 12px;border-radius:9px;color:#4d6762;font-size:14px;transition:.2s ease}
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{background:var(--teal-50);color:var(--teal-800)}
        .nav-cta,.btn-primary{display:inline-flex;justify-content:center;align-items:center;gap:8px;background:var(--orange);color:#fff;border-radius:10px;padding:11px 18px;font-weight:700;box-shadow:0 7px 16px rgba(237,139,58,.2);transition:.2s ease}
        .nav-cta:hover,.btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px)}
        .menu-toggle{display:none;background:transparent;color:var(--teal-900);font-size:24px;padding:6px}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--teal-700);font-size:13px;font-weight:800;letter-spacing:.08em}
        .eyebrow:before{content:"";display:inline-block;width:24px;height:2px;background:var(--orange)}
        .hero{padding:88px 0 74px;background:linear-gradient(135deg,#edf7f1 0%,#fbfaf6 58%,#f9eee1 100%);overflow:hidden}
        .hero-grid{display:grid;grid-template-columns:1.02fr .98fr;align-items:center;gap:70px}
        h1{font-size:clamp(36px,5vw,58px);line-height:1.15;letter-spacing:-.055em;color:var(--teal-950);margin:18px 0 22px}
        .hero-copy{font-size:17px;color:#58706a;max-width:610px}
        .hero-actions{display:flex;align-items:center;gap:13px;margin-top:32px;flex-wrap:wrap}
        .btn-secondary{display:inline-flex;align-items:center;justify-content:center;padding:10px 18px;border:1px solid #b8d3c9;border-radius:10px;color:var(--teal-800);font-weight:700;background:rgba(255,255,255,.7);transition:.2s ease}
        .btn-secondary:hover{border-color:var(--teal-700);background:#fff;transform:translateY(-2px)}
        .hero-note{display:flex;gap:22px;margin-top:35px;color:var(--muted);font-size:13px;flex-wrap:wrap}
        .hero-note span{display:flex;align-items:center;gap:7px}
        .hero-note i{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--orange)}
        .hero-visual{position:relative;min-height:390px}
        .orbit-card{position:absolute;background:#fff;border:1px solid rgba(171,207,195,.8);box-shadow:var(--shadow);border-radius:22px}
        .visual-main{inset:30px 20px 20px 35px;padding:25px;background:var(--teal-950);color:#fff;overflow:hidden}
        .visual-main:after{content:"";position:absolute;width:250px;height:250px;border-radius:50%;background:rgba(35,143,121,.32);right:-90px;top:-90px}
        .screen-top{display:flex;justify-content:space-between;align-items:center;position:relative;z-index:1;color:#c8e6d9;font-size:12px}
        .screen-brand{font-weight:800;font-size:18px;color:#fff}
        .screen-panel{margin-top:30px;position:relative;z-index:1}
        .screen-panel h3{font-size:25px;line-height:1.35;margin-bottom:9px}
        .screen-panel p{color:#afd0c5;font-size:13px;max-width:250px}
        .screen-bars{display:grid;grid-template-columns:1.35fr .8fr;gap:12px;margin-top:25px}
        .bar-box{height:94px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.13);border-radius:13px;padding:13px}
        .bar-box strong{display:block;font-size:21px;color:#fff}
        .bar-box small{color:#a7c7bc}
        .visual-tag{right:-8px;top:22px;padding:15px 18px;color:var(--teal-900);font-weight:800;font-size:14px}
        .visual-tag b{display:block;color:var(--orange-dark);font-size:24px;line-height:1.2}
        .visual-date{left:-2px;bottom:0;padding:14px 16px;display:flex;gap:10px;align-items:center;color:var(--muted);font-size:12px}
        .visual-date strong{font-size:23px;color:var(--teal-800)}
        .section{padding:88px 0}
        .section-soft{background:var(--soft)}
        .section-head{display:flex;justify-content:space-between;gap:25px;align-items:end;margin-bottom:30px}
        .section-head h2{font-size:32px;line-height:1.25;letter-spacing:-.04em;color:var(--teal-950);margin-top:9px}
        .section-head p{color:var(--muted);max-width:460px}
        .text-link{color:var(--teal-700);font-weight:700;font-size:14px;white-space:nowrap}
        .text-link:after{content:" →";transition:.2s}
        .text-link:hover:after{margin-left:4px}
        .quick-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr 1fr;gap:15px}
        .quick-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;min-height:164px;transition:.25s}
        .quick-card:first-child{background:var(--teal-900);color:#fff;border-color:var(--teal-900)}
        .quick-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-sm);border-color:#a6cfc0}
        .quick-icon{width:38px;height:38px;border-radius:11px;background:var(--teal-100);color:var(--teal-800);display:grid;place-items:center;font-weight:800;margin-bottom:20px}
        .quick-card:first-child .quick-icon{background:rgba(255,255,255,.16);color:#fff}
        .quick-card h3{font-size:18px;margin-bottom:6px}
        .quick-card p{color:var(--muted);font-size:13px;line-height:1.65}
        .quick-card:first-child p{color:#c5dfd5}
        .quick-card .text-link{display:inline-block;margin-top:13px;font-size:13px}
        .popular-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:18px}
        .feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;min-height:276px;position:relative;overflow:hidden}
        .feature-card:after{content:"PG";position:absolute;right:24px;bottom:-38px;color:#eef5f0;font-size:160px;font-weight:900;line-height:1}
        .feature-card>*{position:relative;z-index:1}
        .tag{display:inline-flex;padding:4px 9px;border-radius:6px;background:var(--teal-50);color:var(--teal-700);font-size:12px;font-weight:700}
        .tag.orange{background:#fff0e4;color:var(--orange-dark)}
        .feature-card h3{font-size:27px;margin:20px 0 10px;max-width:460px}
        .feature-card p{color:var(--muted);max-width:480px}
        .feature-meta{display:flex;gap:15px;margin-top:25px;color:var(--muted);font-size:12px}
        .mini-stack{display:grid;gap:18px}
        .mini-card{display:flex;gap:17px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:21px;align-items:flex-start;transition:.2s}
        .mini-card:hover{box-shadow:var(--shadow-sm);transform:translateX(3px)}
        .mini-number{width:35px;height:35px;flex:0 0 35px;border-radius:9px;background:#f9e5d3;color:var(--orange-dark);display:grid;place-items:center;font-weight:800}
        .mini-card h3{font-size:17px;margin-bottom:4px}
        .mini-card p{font-size:13px;color:var(--muted)}
        .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
        .step{padding:28px 25px 10px 0;border-bottom:1px solid var(--line);position:relative}
        .step:not(:last-child):after{content:"";position:absolute;right:24px;top:45px;width:28px;height:1px;background:var(--orange)}
        .step-num{font-size:13px;color:var(--orange-dark);font-weight:800;margin-bottom:20px}
        .step h3{font-size:18px;margin-bottom:7px}
        .step p{font-size:13px;color:var(--muted);padding-right:18px}
        .function-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
        .function-item{padding:24px;background:#fff;border:1px solid var(--line);border-radius:14px}
        .function-item strong{display:block;margin-bottom:7px;font-size:16px}
        .function-item span{font-size:13px;color:var(--muted)}
        .function-item b{display:block;color:var(--teal-700);font-size:21px;margin-bottom:12px}
        .updates{background:var(--teal-950);color:#fff}
        .updates .section-head h2{color:#fff}
        .updates .section-head p{color:#b5d0c5}
        .updates .eyebrow{color:#b8e0d0}
        .update-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:20px}
        .update-feature{background:#1a5c54;border-radius:var(--radius);padding:28px;min-height:236px}
        .update-feature strong{font-size:46px;line-height:1;color:#f5c089;display:block;margin-bottom:16px}
        .update-feature h3{font-size:22px;margin-bottom:10px}
        .update-feature p{color:#c0dcd2;font-size:14px}
        .timeline{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:10px 25px}
        .timeline-item{display:grid;grid-template-columns:92px 1fr;gap:20px;padding:19px 0;border-bottom:1px solid rgba(255,255,255,.12)}
        .timeline-item:last-child{border-bottom:0}
        .timeline-item time{color:#f5c089;font-size:13px;font-weight:700}
        .timeline-item h3{font-size:16px;margin-bottom:3px}
        .timeline-item p{font-size:13px;color:#b5d0c5}
        .app-panel{display:grid;grid-template-columns:.85fr 1.15fr;gap:45px;align-items:center;background:#f3eadf;border-radius:24px;padding:42px 48px;overflow:hidden}
        .app-art{min-height:260px;position:relative;display:flex;align-items:center;justify-content:center}
        .device{width:160px;height:278px;background:var(--teal-950);border:7px solid #294d46;border-radius:27px;box-shadow:18px 18px 0 rgba(13,98,90,.15);padding:28px 14px 14px;transform:rotate(-7deg)}
        .device-screen{height:100%;border-radius:17px;background:#eef7f2;padding:15px 10px;color:var(--teal-900)}
        .device-screen b{font-size:12px}
        .device-lines{margin-top:22px;display:grid;gap:9px}
        .device-lines i{height:26px;border-radius:7px;background:#cce5da;display:block}
        .device-lines i:nth-child(2){width:75%;background:#f5c28d}
        .app-copy h2{font-size:32px;line-height:1.25;margin:10px 0 13px;color:var(--teal-950)}
        .app-copy p{color:var(--muted);max-width:570px}
        .app-list{display:flex;gap:10px;flex-wrap:wrap;margin:21px 0}
        .app-list span{background:#fff;border:1px solid #e2d6c9;padding:7px 11px;border-radius:7px;font-size:12px;color:#58706a}
        .download-note{font-size:12px;color:#7c8983;margin-top:12px}
        .experience-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
        .experience-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;min-height:205px}
        .experience-card h3{font-size:19px;margin:20px 0 8px}
        .experience-card p{font-size:13px;color:var(--muted)}
        .circle-icon{width:45px;height:45px;border-radius:50%;background:var(--teal-50);color:var(--teal-700);display:grid;place-items:center;font-weight:800}
        .guide-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:22px}
        .guide-intro{background:var(--teal-800);color:#fff;border-radius:var(--radius);padding:30px}
        .guide-intro h3{font-size:24px;line-height:1.35;margin:13px 0}
        .guide-intro p{color:#c4dfd5;font-size:14px}
        .guide-list{display:grid;gap:10px}
        .guide-row{display:flex;align-items:center;gap:17px;background:#fff;border:1px solid var(--line);border-radius:13px;padding:17px 20px;transition:.2s}
        .guide-row:hover{border-color:#a6cfc0;transform:translateX(4px)}
        .guide-row b{color:var(--orange-dark);font-size:13px;min-width:50px}
        .guide-row h3{font-size:16px}
        .guide-row span{display:block;color:var(--muted);font-size:12px}
        .safety-panel{display:grid;grid-template-columns:1fr 1fr;gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
        .safety-copy{padding:32px;background:var(--teal-50)}
        .safety-copy h2{font-size:28px;line-height:1.3;margin:11px 0}
        .safety-copy p{color:var(--muted)}
        .safety-list{padding:25px 32px;display:grid;grid-template-columns:1fr 1fr;gap:18px}
        .safety-list li{font-size:14px;padding-left:24px;position:relative}
        .safety-list li:before{content:"✓";position:absolute;left:0;color:var(--orange-dark);font-weight:800}
        .scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}
        .scene{border:1px solid var(--line);border-radius:13px;padding:21px;background:#fff}
        .scene small{color:var(--orange-dark);font-weight:800}
        .scene h3{font-size:16px;margin:8px 0}
        .scene p{color:var(--muted);font-size:12px;line-height:1.6}
        .latest-wrap{display:grid;grid-template-columns:1.35fr .65fr;gap:22px}
        .latest-list{display:grid;gap:11px}
        .latest-item{display:grid;grid-template-columns:90px 1fr auto;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:13px;padding:19px 21px;transition:.2s}
        .latest-item:hover{box-shadow:var(--shadow-sm);border-color:#a6cfc0}
        .latest-date{font-size:12px;color:var(--muted)}
        .latest-item h3{font-size:16px;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
        .latest-item p{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
        .latest-arrow{color:var(--teal-700);font-size:20px}
        .latest-aside{background:#fff5e9;border:1px solid #f0dac0;border-radius:var(--radius);padding:27px}
        .latest-aside h3{font-size:21px;line-height:1.35;margin:12px 0}
        .latest-aside p{font-size:13px;color:#806f60}
        .faq-list{max-width:900px;margin:0 auto;border-top:1px solid var(--line)}
        .faq-item{border-bottom:1px solid var(--line)}
        .faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;padding:20px 4px;background:transparent;color:var(--ink);text-align:left;font-weight:700;font-size:16px}
        .faq-question span{font-size:22px;color:var(--teal-700);transition:.2s}
        .faq-answer{display:none;padding:0 38px 20px 4px;color:var(--muted);font-size:14px}
        .faq-item.open .faq-answer{display:block}
        .faq-item.open .faq-question span{transform:rotate(45deg)}
        .final-cta{background:var(--teal-900);color:#fff;padding:62px 0}
        .cta-flex{display:flex;align-items:center;justify-content:space-between;gap:30px}
        .final-cta h2{font-size:32px;line-height:1.3;margin:10px 0}
        .final-cta p{color:#c0ddd3;max-width:600px}
        .feedback{background:#f7f4ee}
        .feedback-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:55px;align-items:start}
        .feedback-copy h2{font-size:30px;line-height:1.3;margin:12px 0}
        .feedback-copy p{color:var(--muted)}
        .feedback-form{display:grid;grid-template-columns:1fr 1fr;gap:14px}
        .field{display:flex;flex-direction:column;gap:6px}
        .field.full{grid-column:1/-1}
        .field label{font-size:13px;font-weight:700;color:var(--teal-900)}
        .field input,.field textarea{border:1px solid var(--line);border-radius:9px;background:#fff;padding:12px 13px;color:var(--ink);outline:none;transition:.2s}
        .field textarea{min-height:110px;resize:vertical}
        .field input:focus,.field textarea:focus{border-color:var(--teal-700);box-shadow:0 0 0 3px rgba(22,119,107,.12)}
        .form-status{grid-column:1/-1;font-size:12px;color:var(--muted)}
        .footer{background:#092f2e;color:#c2d8d0;padding:52px 0 24px}
        .footer-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr 1fr;gap:35px;padding-bottom:38px;border-bottom:1px solid rgba(255,255,255,.13)}
        .footer .brand{color:#fff;margin-bottom:15px}
        .footer-intro{font-size:13px;color:#9ebbb2;max-width:270px}
        .footer h3{color:#fff;font-size:15px;margin-bottom:13px}
        .footer li{margin:8px 0;font-size:13px;color:#9ebbb2}
        .footer a:hover{color:#f5c089}
        .copyright{display:flex;justify-content:space-between;gap:20px;padding-top:20px;color:#86a79d;font-size:12px}
        :focus-visible{outline:3px solid rgba(237,139,58,.55);outline-offset:3px}
        @media(max-width:1024px){
            .main-nav{gap:0}.main-nav a{padding:8px 8px;font-size:13px}.nav-cta{padding:10px 13px}
            .hero-grid{gap:35px}.quick-grid{grid-template-columns:repeat(2,1fr)}
            .function-grid{grid-template-columns:repeat(2,1fr)}.scene-grid{grid-template-columns:repeat(2,1fr)}
        }
        @media(max-width:768px){
            .container{width:min(var(--container),calc(100% - 34px))}
            .topbar,.nav-wrap{height:68px}.nav-wrap{justify-content:space-between}
            .menu-toggle{display:block}.main-nav{display:none;position:absolute;left:17px;right:17px;top:76px;background:#fff;border:1px solid var(--line);border-radius:13px;padding:8px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
            .main-nav.show{display:flex}.main-nav a{padding:12px 14px}.nav-cta{margin:4px 0;text-align:center}
            .hero{padding:62px 0 55px}.hero-grid,.popular-grid,.update-grid,.app-panel,.guide-layout,.safety-panel,.latest-wrap,.feedback-layout{grid-template-columns:1fr}
            .hero-visual{min-height:340px;margin-top:12px}.visual-main{inset:20px 10px 18px 20px}
            .section{padding:62px 0}.section-head{display:block}.section-head h2{font-size:27px}.section-head p{margin-top:10px}
            .steps{grid-template-columns:1fr 1fr}.step{padding-right:15px}.step:not(:last-child):after{display:none}
            .experience-grid{grid-template-columns:1fr}.safety-list{padding:25px;}.app-panel{padding:30px 24px;gap:18px}
            .app-art{min-height:225px}.cta-flex{display:block}.cta-flex .btn-primary{margin-top:23px}
            .footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:8px}
        }
        @media(max-width:520px){
            h1{font-size:37px}.brand{font-size:17px}.brand-mark{width:31px;height:31px}
            .hero-actions{display:grid}.hero-actions a{width:100%}.hero-note{gap:10px;display:grid}
            .quick-grid,.function-grid,.scene-grid,.steps{grid-template-columns:1fr}
            .quick-card{min-height:auto}.feature-card{padding:24px}.feature-card h3{font-size:23px}
            .timeline-item{grid-template-columns:72px 1fr;gap:10px}.latest-item{grid-template-columns:65px 1fr}
            .latest-arrow{display:none}.latest-item p{white-space:normal}.safety-list{grid-template-columns:1fr}
            .feedback-form{grid-template-columns:1fr}.field.full{grid-column:auto}.form-status{grid-column:auto}
            .footer-grid{grid-template-columns:1fr;gap:24px}.footer{padding-top:40px}
        }

/* roulang page: article */
:root{
            --teal-950:#093b3a;
            --teal-900:#0b4d49;
            --teal-800:#0d625a;
            --teal-700:#16776b;
            --teal-100:#dff1eb;
            --teal-50:#eef8f4;
            --orange:#ed8b3a;
            --orange-dark:#ca6b25;
            --ink:#18302e;
            --muted:#6b7d79;
            --soft:#f5f7f4;
            --sand:#fbfaf6;
            --white:#fff;
            --line:#dce8e2;
            --shadow:0 16px 38px rgba(15,67,61,.09);
            --shadow-sm:0 7px 20px rgba(15,67,61,.07);
            --radius:18px;
            --radius-sm:11px;
            --container:1180px;
        }

        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            color:var(--ink);
            background:var(--sand);
            font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
            font-size:15px;
            line-height:1.75;
        }
        a{color:inherit;text-decoration:none}
        a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
            outline:3px solid rgba(237,139,58,.35);
            outline-offset:3px;
        }
        img{display:block;max-width:100%}
        button,input,textarea{font:inherit}
        button{border:0;cursor:pointer}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}

        .topbar{
            height:76px;
            position:sticky;
            top:0;
            z-index:30;
            background:rgba(255,255,255,.97);
            border-bottom:1px solid var(--line);
        }
        .nav-wrap{
            height:76px;
            display:flex;
            align-items:center;
            gap:34px;
        }
        .brand{
            display:inline-flex;
            align-items:center;
            gap:11px;
            white-space:nowrap;
            color:var(--teal-900);
            font-size:20px;
            font-weight:800;
            letter-spacing:-.04em;
        }
        .brand-mark{
            width:34px;
            height:34px;
            display:grid;
            place-items:center;
            position:relative;
            overflow:hidden;
            border-radius:10px;
            color:#fff;
            background:var(--teal-800);
        }
        .brand-mark:before,.brand-mark:after{
            content:"";
            position:absolute;
            border:2px solid rgba(255,255,255,.75);
            border-radius:50%;
        }
        .brand-mark:before{width:22px;height:10px;transform:rotate(35deg)}
        .brand-mark:after{width:10px;height:22px;transform:rotate(35deg)}
        .main-nav{
            display:flex;
            align-items:center;
            gap:5px;
            margin-left:auto;
        }
        .main-nav a{
            padding:9px 12px;
            border-radius:9px;
            color:#4d6762;
            font-size:14px;
            transition:.2s ease;
        }
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{
            color:var(--teal-800);
            background:var(--teal-50);
        }
        .main-nav a.nav-cta{
            color:#fff;
            background:var(--orange);
            font-weight:700;
            box-shadow:0 7px 16px rgba(237,139,58,.2);
        }
        .main-nav a.nav-cta:hover{
            color:#fff;
            background:var(--orange-dark);
            transform:translateY(-2px);
        }
        .menu-toggle{
            display:none;
            padding:6px;
            color:var(--teal-900);
            background:transparent;
            font-size:24px;
        }

        .article-hero{
            padding:58px 0 52px;
            background:linear-gradient(135deg,#edf7f1 0%,#fbfaf6 66%,#f9eee1 100%);
            border-bottom:1px solid var(--line);
        }
        .breadcrumb{
            display:flex;
            align-items:center;
            gap:10px;
            margin-bottom:27px;
            color:var(--muted);
            font-size:13px;
        }
        .breadcrumb a{color:var(--teal-700);font-weight:700}
        .breadcrumb .separator{color:#a3b9b1}
        .article-head{
            max-width:880px;
        }
        .eyebrow{
            display:inline-flex;
            align-items:center;
            gap:8px;
            color:var(--teal-700);
            font-size:13px;
            font-weight:800;
            letter-spacing:.08em;
        }
        .eyebrow:before{
            content:"";
            width:24px;
            height:2px;
            background:var(--orange);
        }
        .article-head h1{
            margin:15px 0 18px;
            color:var(--teal-950);
            font-size:clamp(32px,4vw,48px);
            line-height:1.25;
            letter-spacing:-.045em;
            font-weight:850;
        }
        .article-summary{
            max-width:780px;
            margin:0;
            color:#58706a;
            font-size:17px;
        }
        .article-meta{
            display:flex;
            align-items:center;
            flex-wrap:wrap;
            gap:12px 20px;
            margin-top:25px;
            color:var(--muted);
            font-size:13px;
        }
        .tag{
            display:inline-flex;
            align-items:center;
            padding:4px 10px;
            border-radius:6px;
            color:var(--teal-700);
            background:var(--teal-50);
            font-size:12px;
            font-weight:800;
        }
        .tag.orange{color:var(--orange-dark);background:#fff0e4}

        .article-layout{
            display:grid;
            grid-template-columns:minmax(0,780px) 300px;
            gap:54px;
            align-items:start;
            padding:72px 0 88px;
        }
        .article-content{
            min-width:0;
            padding:42px 48px;
            border:1px solid var(--line);
            border-radius:var(--radius);
            background:var(--white);
            box-shadow:var(--shadow-sm);
        }
        .article-content h2{
            margin:34px 0 15px;
            padding-left:16px;
            border-left:4px solid var(--orange);
            color:var(--teal-950);
            font-size:27px;
            line-height:1.4;
        }
        .article-content h3{
            margin:27px 0 11px;
            color:var(--teal-900);
            font-size:20px;
            line-height:1.45;
        }
        .article-content p{margin:0 0 19px;color:#425b56}
        .article-content ul,.article-content ol{
            margin:0 0 22px;
            padding-left:25px;
            color:#425b56;
        }
        .article-content li{margin:8px 0}
        .article-content blockquote{
            margin:28px 0;
            padding:20px 24px;
            border-left:4px solid var(--teal-700);
            border-radius:0 12px 12px 0;
            color:var(--teal-900);
            background:var(--teal-50);
        }
        .article-content table{
            width:100%;
            margin:25px 0;
            border-collapse:collapse;
            overflow:hidden;
            border:1px solid var(--line);
        }
        .article-content th,.article-content td{
            padding:12px 14px;
            border:1px solid var(--line);
            text-align:left;
        }
        .article-content th{color:var(--teal-950);background:var(--teal-50)}
        .article-content hr{margin:34px 0;border:0;border-top:1px solid var(--line)}

        .article-side{
            position:sticky;
            top:104px;
            display:grid;
            gap:16px;
        }
        .side-card{
            padding:23px;
            border:1px solid var(--line);
            border-radius:var(--radius);
            background:#fff;
            box-shadow:var(--shadow-sm);
        }
        .side-card.dark{
            color:#fff;
            background:var(--teal-950);
            border-color:var(--teal-950);
        }
        .side-card h2{
            margin:0 0 11px;
            font-size:19px;
            line-height:1.4;
        }
        .side-card p{margin:0;color:var(--muted);font-size:13px}
        .side-card.dark p{color:#c6dfd6}
        .side-links{display:grid;gap:10px;margin-top:17px}
        .side-links a{
            display:flex;
            align-items:center;
            justify-content:space-between;
            padding:10px 12px;
            border-radius:9px;
            color:var(--teal-800);
            background:var(--teal-50);
            font-size:13px;
            font-weight:700;
            transition:.2s ease;
        }
        .side-links a:hover{background:var(--teal-100);padding-left:16px}
        .side-card.dark .btn-primary{width:100%;margin-top:19px}

        .article-actions{
            display:flex;
            align-items:center;
            justify-content:space-between;
            gap:20px;
            margin-top:25px;
            padding:23px 26px;
            border:1px solid #f2d5bb;
            border-radius:var(--radius);
            background:#fff8f1;
        }
        .article-actions h2{margin:0 0 4px;color:var(--teal-950);font-size:19px}
        .article-actions p{margin:0;color:var(--muted);font-size:13px}
        .btn-primary,.btn-secondary{
            display:inline-flex;
            align-items:center;
            justify-content:center;
            min-height:44px;
            padding:10px 18px;
            border-radius:10px;
            font-weight:750;
            transition:.2s ease;
        }
        .btn-primary{
            color:#fff;
            background:var(--orange);
            box-shadow:0 7px 16px rgba(237,139,58,.2);
        }
        .btn-primary:hover{color:#fff;background:var(--orange-dark);transform:translateY(-2px)}
        .btn-secondary{
            color:var(--teal-800);
            border:1px solid #b8d3c9;
            background:#fff;
        }
        .btn-secondary:hover{border-color:var(--teal-700);transform:translateY(-2px)}

        .related-section{
            padding:76px 0;
            background:var(--soft);
            border-top:1px solid var(--line);
        }
        .section-head{
            display:flex;
            align-items:end;
            justify-content:space-between;
            gap:24px;
            margin-bottom:27px;
        }
        .section-head h2{
            margin:9px 0 0;
            color:var(--teal-950);
            font-size:30px;
            line-height:1.3;
            letter-spacing:-.04em;
        }
        .section-head p{max-width:450px;margin:0;color:var(--muted)}
        .related-grid{
            display:grid;
            grid-template-columns:repeat(3,1fr);
            gap:16px;
        }
        .related-card{
            min-height:185px;
            padding:23px;
            border:1px solid var(--line);
            border-radius:var(--radius);
            background:#fff;
            transition:.25s ease;
        }
        .related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm);border-color:#a6cfc0}
        .related-card h3{margin:15px 0 8px;color:var(--teal-950);font-size:18px;line-height:1.45}
        .related-card p{margin:0;color:var(--muted);font-size:13px}
        .related-card .date{display:block;margin-top:18px;color:#8a9b96;font-size:12px}

        .feedback-section{padding:70px 0}
        .feedback-box{
            display:grid;
            grid-template-columns:.9fr 1.1fr;
            gap:50px;
            padding:40px;
            border-radius:var(--radius);
            background:var(--teal-900);
            color:#fff;
        }
        .feedback-box h2{margin:0 0 12px;font-size:28px;line-height:1.35}
        .feedback-box p{margin:0;color:#c6dfd6}
        .feedback-form{display:grid;gap:13px}
        .feedback-form input,.feedback-form textarea{
            width:100%;
            padding:12px 14px;
            border:1px solid rgba(255,255,255,.18);
            border-radius:9px;
            outline:0;
            color:var(--ink);
            background:#fff;
        }
        .feedback-form textarea{min-height:100px;resize:vertical}
        .feedback-form input:focus,.feedback-form textarea:focus{border-color:var(--orange);box-shadow:0 0 0 3px rgba(237,139,58,.2)}
        .feedback-form small{color:#b9d6cc;font-size:12px}
        .feedback-form .btn-primary{justify-self:start}

        .footer{
            padding:54px 0 22px;
            color:#c4dad2;
            background:var(--teal-950);
        }
        .footer-grid{
            display:grid;
            grid-template-columns:1.5fr 1fr 1fr 1fr;
            gap:34px;
            padding-bottom:42px;
        }
        .footer .brand{color:#fff}
        .footer-intro{max-width:290px;margin:18px 0 0;color:#9ebcb3;font-size:13px}
        .footer h3{margin:3px 0 15px;color:#fff;font-size:15px}
        .footer ul{list-style:none;padding:0;margin:0}
        .footer li{margin:8px 0}
        .footer li a{color:#a9c7bd;font-size:13px;transition:.2s}
        .footer li a:hover{color:#fff;padding-left:4px}
        .copyright{
            display:flex;
            justify-content:space-between;
            gap:20px;
            padding-top:20px;
            border-top:1px solid rgba(255,255,255,.14);
            color:#88aaa0;
            font-size:12px;
        }

        .not-found{
            padding:72px 25px;
            text-align:center;
            border:1px solid var(--line);
            border-radius:var(--radius);
            background:#fff;
        }
        .not-found h2{margin:0 0 10px;color:var(--teal-950);font-size:28px}
        .not-found p{margin:0 0 22px;color:var(--muted)}

        @media (max-width:1024px){
            .container{width:min(var(--container),calc(100% - 36px))}
            .nav-wrap{gap:16px}
            .main-nav a{padding:8px 8px;font-size:13px}
            .article-layout{grid-template-columns:minmax(0,1fr) 260px;gap:25px}
            .footer-grid{grid-template-columns:1.3fr 1fr 1fr 1fr;gap:20px}
        }
        @media (max-width:768px){
            .topbar,.nav-wrap{height:68px}
            .main-nav{
                display:none;
                position:absolute;
                top:68px;
                left:0;
                right:0;
                align-items:stretch;
                flex-direction:column;
                gap:3px;
                padding:13px 18px 18px;
                border-bottom:1px solid var(--line);
                background:#fff;
                box-shadow:var(--shadow-sm);
            }
            .main-nav.open{display:flex}
            .main-nav a{padding:12px 14px}
            .main-nav a.nav-cta{text-align:center}
            .menu-toggle{display:block;margin-left:auto}
            .article-hero{padding:40px 0 38px}
            .article-layout{display:block;padding:45px 0 60px}
            .article-side{position:static;margin-top:22px}
            .article-content{padding:29px 24px}
            .article-actions{align-items:flex-start;flex-direction:column}
            .related-grid{grid-template-columns:1fr 1fr}
            .feedback-box{grid-template-columns:1fr;gap:25px;padding:29px 24px}
            .footer-grid{grid-template-columns:1fr 1fr}
        }
        @media (max-width:520px){
            .container{width:calc(100% - 30px)}
            .brand{font-size:17px}
            .brand-mark{width:31px;height:31px}
            .article-head h1{font-size:31px}
            .article-summary{font-size:15px}
            .article-content{padding:24px 18px}
            .article-content h2{font-size:23px}
            .article-content h3{font-size:18px}
            .section-head{display:block}
            .section-head p{margin-top:10px}
            .related-grid{grid-template-columns:1fr}
            .feedback-form .btn-primary{width:100%}
            .footer-grid{grid-template-columns:1fr;gap:25px}
            .copyright{display:block}
            .copyright span{display:block;margin-top:7px}
        }

/* roulang page: category1 */
:root{
            --teal-950:#093b3a;
            --teal-900:#0b4d49;
            --teal-800:#0d625a;
            --teal-700:#16776b;
            --teal-100:#dff1eb;
            --teal-50:#eef8f4;
            --orange:#ed8b3a;
            --orange-dark:#ca6b25;
            --ink:#18302e;
            --muted:#6b7d79;
            --soft:#f5f7f4;
            --sand:#fbfaf6;
            --white:#fff;
            --line:#dce8e2;
            --shadow:0 16px 38px rgba(15,67,61,.09);
            --shadow-sm:0 7px 20px rgba(15,67,61,.07);
            --radius:18px;
            --radius-sm:11px;
            --container:1180px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;background:var(--sand);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7}
        a{color:inherit;text-decoration:none}
        a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(237,139,58,.45);outline-offset:3px}
        img{display:block;max-width:100%}
        button,input,textarea{font:inherit}
        button{cursor:pointer;border:0}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .topbar{height:76px;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
        .nav-wrap{height:76px;display:flex;align-items:center;gap:30px}
        .brand{display:inline-flex;align-items:center;gap:11px;white-space:nowrap;font-weight:800;font-size:20px;letter-spacing:-.03em;color:var(--teal-900)}
        .brand-mark{width:34px;height:34px;border-radius:10px;background:var(--teal-800);display:grid;place-items:center;color:#fff;font-weight:900;position:relative;overflow:hidden}
        .brand-mark:before,.brand-mark:after{content:"";position:absolute;border:2px solid rgba(255,255,255,.75);border-radius:50%}
        .brand-mark:before{width:22px;height:10px;transform:rotate(35deg)}
        .brand-mark:after{width:10px;height:22px;transform:rotate(35deg)}
        .main-nav{display:flex;align-items:center;gap:5px;margin-left:auto}
        .main-nav a{padding:9px 12px;border-radius:9px;color:#4d6762;font-size:14px;transition:.2s ease}
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{background:var(--teal-50);color:var(--teal-800)}
        .main-nav .nav-cta,.btn-primary{display:inline-flex;justify-content:center;align-items:center;gap:8px;background:var(--orange);color:#fff;border-radius:10px;padding:11px 18px;font-weight:700;box-shadow:0 7px 16px rgba(237,139,58,.2);transition:.2s ease}
        .main-nav .nav-cta:hover,.btn-primary:hover{background:var(--orange-dark);color:#fff;transform:translateY(-2px)}
        .menu-toggle{display:none;background:transparent;color:var(--teal-900);font-size:24px;padding:6px}
        .page-hero{padding:54px 0 48px;background:linear-gradient(135deg,#edf7f1 0%,#fbfaf6 65%,#f9eee1 100%);border-bottom:1px solid var(--line)}
        .breadcrumb{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin-bottom:25px}
        .breadcrumb a{color:var(--teal-700);font-weight:700}
        .breadcrumb span{color:#9aa9a5}
        .hero-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:end}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--teal-700);font-size:13px;font-weight:800;letter-spacing:.08em}
        .eyebrow:before{content:"";display:inline-block;width:24px;height:2px;background:var(--orange)}
        h1,h2,h3,p{margin-top:0}
        h1{font-size:clamp(34px,4.2vw,52px);line-height:1.16;letter-spacing:-.055em;color:var(--teal-950);margin:13px 0 18px}
        .hero-copy{font-size:17px;color:#58706a;max-width:680px;margin-bottom:25px}
        .hero-tags{display:flex;gap:9px;flex-wrap:wrap}
        .tag{display:inline-flex;padding:5px 10px;border-radius:7px;background:var(--teal-50);color:var(--teal-700);font-size:12px;font-weight:700}
        .tag.orange{background:#fff0e4;color:var(--orange-dark)}
        .hero-panel{background:var(--teal-950);color:#fff;border-radius:var(--radius);padding:27px;box-shadow:var(--shadow);position:relative;overflow:hidden}
        .hero-panel:after{content:"PG";position:absolute;right:-8px;bottom:-44px;color:rgba(255,255,255,.07);font-size:150px;font-weight:900;line-height:1}
        .hero-panel>*{position:relative;z-index:1}
        .panel-label{color:#b9dcd0;font-size:13px;font-weight:700}
        .panel-title{font-size:24px;font-weight:800;margin:8px 0 18px}
        .panel-list{display:grid;gap:11px}
        .panel-list div{display:flex;justify-content:space-between;gap:15px;border-top:1px solid rgba(255,255,255,.13);padding-top:10px;color:#d8ebe4;font-size:13px}
        .panel-list b{color:#fff}
        .section{padding:76px 0}
        .section-soft{background:var(--soft)}
        .section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:28px}
        .section-head h2{font-size:32px;line-height:1.25;letter-spacing:-.04em;color:var(--teal-950);margin:8px 0 0}
        .section-head p{color:var(--muted);max-width:490px;margin-bottom:0}
        .text-link{color:var(--teal-700);font-weight:700;font-size:14px;white-space:nowrap}
        .text-link:after{content:" →";transition:.2s}
        .text-link:hover:after{margin-left:4px}
        .overview-grid{display:grid;grid-template-columns:1.25fr .75fr .75fr;gap:16px}
        .info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;min-height:174px;transition:.25s}
        .info-card:hover,.news-card:hover,.feature-card:hover,.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm);border-color:#a6cfc0}
        .info-card.primary{background:var(--teal-900);border-color:var(--teal-900);color:#fff}
        .card-icon{width:40px;height:40px;border-radius:12px;background:var(--teal-100);color:var(--teal-800);display:grid;place-items:center;font-weight:900;margin-bottom:18px}
        .primary .card-icon{background:rgba(255,255,255,.15);color:#fff}
        .info-card h3,.scene-card h3{font-size:19px;margin-bottom:7px}
        .info-card p,.scene-card p{color:var(--muted);font-size:13px;margin-bottom:0}
        .primary p{color:#c5dfd5}
        .guide-band{display:grid;grid-template-columns:.82fr 1.18fr;gap:30px;align-items:stretch}
        .feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.25s;position:relative;overflow:hidden}
        .feature-card:after{content:"01";position:absolute;right:23px;bottom:-36px;color:#edf5f0;font-size:150px;font-weight:900;line-height:1}
        .feature-card>*{position:relative;z-index:1}
        .feature-card h2{font-size:28px;line-height:1.3;color:var(--teal-950);margin:19px 0 10px}
        .feature-card p{color:var(--muted);max-width:440px}
        .feature-points{display:grid;gap:12px;margin:24px 0 0;padding:0;list-style:none}
        .feature-points li{display:flex;gap:10px;align-items:flex-start;font-size:14px}
        .feature-points li:before{content:"✓";color:var(--orange-dark);font-weight:900}
        .step-list{background:var(--teal-50);border:1px solid #d5e9df;border-radius:var(--radius);padding:28px;display:grid;gap:19px}
        .step{display:grid;grid-template-columns:38px 1fr;gap:14px;align-items:start}
        .step-num{width:34px;height:34px;border-radius:10px;background:var(--teal-800);color:#fff;display:grid;place-items:center;font-weight:800}
        .step h3{font-size:17px;margin:0 0 3px}
        .step p{font-size:13px;color:var(--muted);margin:0}
        .news-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}
        .news-list{display:grid;gap:12px}
        .news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px 22px;display:grid;grid-template-columns:90px 1fr;gap:18px;transition:.25s}
        .news-date{color:var(--orange-dark);font-size:13px;font-weight:800;padding-top:3px}
        .news-card h3{font-size:18px;line-height:1.4;margin-bottom:6px;color:var(--teal-950)}
        .news-card p{font-size:13px;color:var(--muted);margin:0 0 9px}
        .meta{display:flex;gap:10px;align-items:center;color:#82918d;font-size:12px}
        .empty-state{background:#fff;border:1px dashed #b9d3c8;border-radius:var(--radius-sm);padding:32px;text-align:center;color:var(--muted)}
        .news-side{background:var(--teal-900);color:#fff;border-radius:var(--radius);padding:28px;display:flex;flex-direction:column;justify-content:space-between}
        .news-side h3{font-size:23px;line-height:1.35;margin-bottom:12px}
        .news-side p{color:#c5dfd5;font-size:14px}
        .news-side .text-link{color:#ffe0bf;margin-top:20px}
        .scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
        .scene-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:22px;transition:.25s}
        .scene-card strong{display:block;color:var(--orange-dark);font-size:13px;margin-bottom:13px}
        .app-section{background:var(--teal-950);color:#fff}
        .app-layout{display:grid;grid-template-columns:1fr 1fr;gap:65px;align-items:center}
        .app-section .eyebrow{color:#9ed1c1}
        .app-section h2{font-size:34px;line-height:1.25;margin:12px 0 14px;letter-spacing:-.04em}
        .app-section p{color:#c5dfd5;max-width:560px}
        .app-features{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0}
        .app-features span{padding:7px 12px;border:1px solid rgba(255,255,255,.18);border-radius:8px;color:#d8ebe4;font-size:13px}
        .app-board{background:#fff;color:var(--ink);border-radius:var(--radius);padding:27px;box-shadow:var(--shadow)}
        .app-board-title{font-weight:800;font-size:20px;color:var(--teal-900);margin-bottom:17px}
        .device-row{display:flex;gap:12px;margin-bottom:20px}
        .device{flex:1;background:var(--teal-50);border-radius:10px;padding:12px;text-align:center;color:var(--teal-800);font-size:13px;font-weight:700}
        .download-note{font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:15px;margin-bottom:18px}
        .faq-list{display:grid;gap:10px;max-width:850px}
        .faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}
        .faq-item summary{list-style:none;cursor:pointer;padding:18px 21px;font-weight:800;color:var(--teal-900);position:relative;padding-right:48px}
        .faq-item summary::-webkit-details-marker{display:none}
        .faq-item summary:after{content:"+";position:absolute;right:20px;color:var(--orange-dark);font-size:22px;top:13px}
        .faq-item[open] summary:after{content:"−"}
        .faq-answer{padding:0 21px 18px;color:var(--muted);font-size:14px}
        .cta-strip{padding:54px 0;background:#f9eee1}
        .cta-inner{display:flex;justify-content:space-between;align-items:center;gap:25px}
        .cta-inner h2{color:var(--teal-950);font-size:27px;margin:0 0 6px}
        .cta-inner p{color:var(--muted);margin:0}
        .footer{background:#083634;color:#d7e9e2;padding:53px 0 20px}
        .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}
        .footer .brand{color:#fff;margin-bottom:15px}
        .footer-intro{color:#a9c8be;font-size:13px;max-width:270px}
        .footer h3{color:#fff;font-size:15px;margin:3px 0 14px}
        .footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
        .footer li,.footer a{font-size:13px;color:#a9c8be}
        .footer a:hover{color:#fff}
        .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:38px;padding-top:17px;display:flex;justify-content:space-between;gap:15px;color:#8eafa5;font-size:12px}
        @media (max-width:1024px){
            .main-nav a{padding-left:8px;padding-right:8px;font-size:13px}
            .nav-wrap{gap:15px}
            .hero-layout,.guide-band,.app-layout{gap:35px}
            .scene-grid{grid-template-columns:repeat(2,1fr)}
        }
        @media (max-width:768px){
            .container{width:min(var(--container),calc(100% - 32px))}
            .topbar,.nav-wrap{height:68px}
            .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:12px 16px;flex-direction:column;align-items:stretch;box-shadow:var(--shadow-sm)}
            .main-nav.open{display:flex}
            .main-nav a{padding:12px 14px}
            .main-nav .nav-cta{text-align:center;margin-top:5px}
            .menu-toggle{display:block;margin-left:auto}
            .page-hero{padding:36px 0 40px}
            .hero-layout,.guide-band,.news-layout,.app-layout{grid-template-columns:1fr}
            .hero-panel{max-width:580px}
            .section{padding:58px 0}
            .section-head{display:block}
            .section-head h2{font-size:27px}
            .section-head p{margin-top:10px}
            .overview-grid{grid-template-columns:1fr 1fr}
            .overview-grid .primary{grid-column:span 2}
            .cta-inner{display:block}
            .cta-inner .btn-primary{margin-top:20px}
            .footer-grid{grid-template-columns:1fr 1fr}
        }
        @media (max-width:520px){
            h1{font-size:35px}
            .hero-copy{font-size:16px}
            .overview-grid,.scene-grid{grid-template-columns:1fr}
            .overview-grid .primary{grid-column:auto}
            .news-card{grid-template-columns:1fr;gap:5px}
            .news-date{padding:0}
            .app-section h2{font-size:28px}
            .footer-grid{grid-template-columns:1fr;gap:24px}
            .copyright{display:block;line-height:2}
            .copyright span{display:block}
        }

/* roulang page: category2 */
:root{
            --teal-950:#093b3a;
            --teal-900:#0b4d49;
            --teal-800:#0d625a;
            --teal-700:#16776b;
            --teal-100:#dff1eb;
            --teal-50:#eef8f4;
            --orange:#ed8b3a;
            --orange-dark:#ca6b25;
            --ink:#18302e;
            --muted:#6b7d79;
            --soft:#f5f7f4;
            --sand:#fbfaf6;
            --white:#fff;
            --line:#dce8e2;
            --shadow:0 16px 38px rgba(15,67,61,.09);
            --shadow-sm:0 7px 20px rgba(15,67,61,.07);
            --radius:18px;
            --radius-sm:11px;
            --container:1180px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;color:var(--ink);background:var(--sand);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7}
        a{color:inherit;text-decoration:none}
        img{display:block;max-width:100%}
        button,input,textarea{font:inherit}
        button{cursor:pointer}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .topbar{height:76px;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
        .nav-wrap{height:76px;display:flex;align-items:center;gap:34px}
        .brand{display:inline-flex;align-items:center;gap:11px;white-space:nowrap;font-size:20px;font-weight:800;letter-spacing:-.03em;color:var(--teal-900)}
        .brand-mark{width:34px;height:34px;border-radius:10px;background:var(--teal-800);display:grid;place-items:center;color:#fff;font-weight:900;position:relative;overflow:hidden}
        .brand-mark:before,.brand-mark:after{content:"";position:absolute;border:2px solid rgba(255,255,255,.75);border-radius:50%}
        .brand-mark:before{width:22px;height:10px;transform:rotate(35deg)}
        .brand-mark:after{width:10px;height:22px;transform:rotate(35deg)}
        .main-nav{display:flex;align-items:center;gap:5px;margin-left:auto}
        .main-nav a{padding:9px 12px;border-radius:9px;color:#4d6762;font-size:14px;transition:.2s ease}
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{background:var(--teal-50);color:var(--teal-800)}
        .main-nav .nav-cta,.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--orange);color:#fff;border-radius:10px;padding:11px 18px;font-weight:700;box-shadow:0 7px 16px rgba(237,139,58,.2)}
        .main-nav .nav-cta:hover,.btn-primary:hover{background:var(--orange-dark);color:#fff;transform:translateY(-2px)}
        .menu-toggle{display:none;border:0;background:transparent;color:var(--teal-900);font-size:24px;padding:6px}
        .page-hero{padding:54px 0 58px;background:linear-gradient(135deg,#edf7f1,#fbfaf6 64%,#f9eee1)}
        .crumbs{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin-bottom:24px}
        .crumbs a{color:var(--teal-700);font-weight:700}
        .crumbs span{color:#9aaca6}
        .hero-layout{display:grid;grid-template-columns:1.12fr .88fr;gap:55px;align-items:end}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--teal-700);font-size:13px;font-weight:800;letter-spacing:.08em}
        .eyebrow:before{content:"";width:24px;height:2px;background:var(--orange)}
        h1,h2,h3,p{margin-top:0}
        h1{margin:14px 0 18px;color:var(--teal-950);font-size:clamp(34px,5vw,52px);line-height:1.16;letter-spacing:-.055em}
        .hero-text{max-width:650px;color:#58706a;font-size:17px}
        .hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:25px}
        .tag{display:inline-flex;padding:5px 10px;border-radius:7px;background:var(--teal-50);color:var(--teal-700);font-size:12px;font-weight:700}
        .tag.orange{background:#fff0e4;color:var(--orange-dark)}
        .hero-panel{background:var(--teal-950);border-radius:22px;padding:27px;color:#fff;box-shadow:var(--shadow);position:relative;overflow:hidden}
        .hero-panel:after{content:"平台";position:absolute;right:-8px;bottom:-24px;color:rgba(255,255,255,.07);font-size:110px;font-weight:900}
        .panel-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(255,255,255,.14);padding-bottom:18px;margin-bottom:20px}
        .panel-title{font-size:18px;font-weight:800}
        .status{font-size:12px;color:#bfe5d5;display:flex;align-items:center;gap:6px}
        .status:before{content:"";width:7px;height:7px;border-radius:50%;background:#75d2a8}
        .panel-list{display:grid;gap:12px;position:relative;z-index:1}
        .panel-row{display:flex;justify-content:space-between;align-items:center;padding:13px 14px;border-radius:11px;background:rgba(255,255,255,.08);font-size:14px}
        .panel-row b{color:#f6c28f;font-size:13px}
        .section{padding:78px 0}
        .section-soft{background:var(--soft)}
        .section-head{display:flex;justify-content:space-between;gap:25px;align-items:end;margin-bottom:28px}
        .section-head h2{margin:8px 0 0;color:var(--teal-950);font-size:32px;line-height:1.25;letter-spacing:-.04em}
        .section-head p{max-width:470px;margin-bottom:0;color:var(--muted)}
        .filter-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:20px;padding:14px 17px;background:#fff;border:1px solid var(--line);border-radius:13px}
        .filter-label{font-size:13px;color:var(--muted)}
        .filter-list{display:flex;gap:8px;flex-wrap:wrap}
        .filter-list span{padding:6px 11px;border-radius:7px;background:var(--teal-50);color:var(--teal-800);font-size:12px;font-weight:700}
        .content-list{display:grid;grid-template-columns:1.15fr .85fr;gap:16px}
        .content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.25s ease}
        .content-card:hover{transform:translateY(-4px);border-color:#a6cfc0;box-shadow:var(--shadow-sm)}
        .content-card.large{grid-row:span 2;padding:30px}
        .card-meta{display:flex;align-items:center;gap:12px;color:#91a19c;font-size:12px;margin-bottom:15px}
        .content-card h3{margin:0 0 9px;color:var(--teal-950);font-size:20px;line-height:1.4}
        .content-card.large h3{font-size:27px;max-width:520px}
        .content-card p{margin:0;color:var(--muted);font-size:14px}
        .read-link{display:inline-block;margin-top:19px;color:var(--teal-700);font-size:13px;font-weight:800}
        .read-link:after{content:"  →";transition:.2s}
        .read-link:hover:after{margin-left:4px}
        .empty-state{padding:38px;text-align:center;background:#fff;border:1px dashed #bfd5cb;border-radius:var(--radius);color:var(--muted)}
        .empty-state strong{display:block;color:var(--teal-900);font-size:18px;margin-bottom:5px}
        .feature-strip{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
        .feature-main,.feature-side{border-radius:var(--radius);padding:30px;background:#fff;border:1px solid var(--line)}
        .feature-main{background:var(--teal-900);color:#fff;min-height:220px}
        .feature-main h3{font-size:26px;margin:18px 0 9px}
        .feature-main p{max-width:560px;color:#c7e2d8}
        .feature-side{display:flex;flex-direction:column;justify-content:center}
        .feature-side h3{font-size:21px;color:var(--teal-950);margin:14px 0 7px}
        .feature-side p{color:var(--muted);margin-bottom:0}
        .scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
        .scenario{padding:23px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm)}
        .scenario-num{color:var(--orange-dark);font-weight:900;font-size:13px}
        .scenario h3{margin:12px 0 7px;font-size:18px;color:var(--teal-900)}
        .scenario p{margin:0;color:var(--muted);font-size:13px}
        .support-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:18px}
        .support-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
        .support-card h3{color:var(--teal-950);font-size:22px;margin-bottom:11px}
        .support-card p{color:var(--muted)}
        .support-list{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:12px}
        .support-list li{display:flex;gap:11px;align-items:flex-start;color:#4d6762;font-size:14px}
        .support-list li:before{content:"✓";color:var(--orange-dark);font-weight:900}
        .faq-list{display:grid;gap:10px;max-width:850px}
        .faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
        .faq-item summary{padding:18px 20px;cursor:pointer;font-weight:800;color:var(--teal-900);list-style:none;display:flex;justify-content:space-between;gap:20px}
        .faq-item summary::-webkit-details-marker{display:none}
        .faq-item summary:after{content:"＋";color:var(--orange-dark);font-size:20px;line-height:1}
        .faq-item[open] summary:after{content:"－"}
        .faq-answer{padding:0 20px 18px;color:var(--muted);font-size:14px}
        .cta-band{padding:42px 0;background:var(--teal-900);color:#fff}
        .cta-inner{display:flex;justify-content:space-between;align-items:center;gap:25px}
        .cta-inner h2{font-size:28px;margin:0 0 7px}
        .cta-inner p{margin:0;color:#c6e1d7}
        .footer{padding:55px 0 20px;background:var(--teal-950);color:#d3e7df}
        .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:35px;padding-bottom:38px}
        .footer .brand{color:#fff}
        .footer-intro{max-width:300px;margin-top:18px;color:#9ebbb1;font-size:13px}
        .footer h3{font-size:14px;color:#fff;margin-bottom:14px}
        .footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
        .footer li,.footer a{color:#9ebbb1;font-size:13px}
        .footer a:hover{color:#f4b275}
        .copyright{border-top:1px solid rgba(255,255,255,.13);padding-top:18px;display:flex;justify-content:space-between;gap:18px;color:#7f9e95;font-size:12px}
        :focus-visible{outline:3px solid rgba(237,139,58,.55);outline-offset:3px}
        @media(max-width:1024px){
            .nav-wrap{gap:18px}.main-nav a{padding:8px 8px;font-size:13px}
            .hero-layout,.content-list,.feature-strip,.support-layout{grid-template-columns:1fr}
            .hero-panel{max-width:620px}
        }
        @media(max-width:768px){
            .container{width:min(var(--container),calc(100% - 32px))}
            .topbar,.nav-wrap{height:68px}
            .main-nav{display:none;position:absolute;left:16px;right:16px;top:64px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
            .main-nav.open{display:flex}.main-nav a{padding:12px 14px}.menu-toggle{display:block;margin-left:auto}
            .page-hero{padding:38px 0 42px}.section{padding:58px 0}
            .section-head,.cta-inner{display:block}.section-head p{margin-top:12px}
            .scenario-grid{grid-template-columns:1fr 1fr}
            .cta-inner .btn-primary{margin-top:22px}
            .footer-grid{grid-template-columns:1fr 1fr}
            .copyright{display:block}.copyright span{display:block;margin-top:6px}
        }
        @media(max-width:520px){
            h1{font-size:35px}.hero-text{font-size:15px}
            .hero-panel{padding:21px}.filter-bar{display:block}.filter-list{margin-top:10px}
            .content-card.large{padding:24px}.content-card.large h3{font-size:23px}
            .scenario-grid,.footer-grid{grid-template-columns:1fr}
            .section-head h2{font-size:27px}
        }

/* roulang page: category3 */
:root{
            --teal-950:#093b3a;
            --teal-900:#0b4d49;
            --teal-800:#0d625a;
            --teal-700:#16776b;
            --teal-100:#dff1eb;
            --teal-50:#eef8f4;
            --orange:#ed8b3a;
            --orange-dark:#ca6b25;
            --ink:#18302e;
            --muted:#6b7d79;
            --soft:#f5f7f4;
            --sand:#fbfaf6;
            --white:#fff;
            --line:#dce8e2;
            --shadow:0 16px 38px rgba(15,67,61,.09);
            --shadow-sm:0 7px 20px rgba(15,67,61,.07);
            --radius:18px;
            --radius-sm:11px;
            --container:1180px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;background:var(--sand);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7}
        a{color:inherit;text-decoration:none}
        img{display:block;max-width:100%}
        button,input,textarea{font:inherit}
        button{cursor:pointer;border:0}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .topbar{height:76px;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
        .nav-wrap{height:76px;display:flex;align-items:center;gap:30px}
        .brand{display:inline-flex;align-items:center;gap:11px;white-space:nowrap;font-weight:800;font-size:20px;letter-spacing:-.03em;color:var(--teal-900)}
        .brand-mark{width:34px;height:34px;border-radius:10px;background:var(--teal-800);display:grid;place-items:center;color:#fff;font-weight:900;position:relative;overflow:hidden}
        .brand-mark:before,.brand-mark:after{content:"";position:absolute;border:2px solid rgba(255,255,255,.75);border-radius:50%}
        .brand-mark:before{width:22px;height:10px;transform:rotate(35deg)}
        .brand-mark:after{width:10px;height:22px;transform:rotate(35deg)}
        .main-nav{display:flex;align-items:center;gap:5px;margin-left:auto}
        .main-nav a{padding:9px 12px;border-radius:9px;color:#4d6762;font-size:14px;transition:.2s ease}
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{background:var(--teal-50);color:var(--teal-800)}
        .main-nav .nav-cta{background:var(--orange);color:#fff;font-weight:700;box-shadow:0 7px 16px rgba(237,139,58,.2)}
        .main-nav .nav-cta:hover{background:var(--orange-dark);color:#fff;transform:translateY(-2px)}
        .menu-toggle{display:none;background:transparent;color:var(--teal-900);font-size:24px;padding:6px}
        .page-hero{padding:54px 0 48px;background:linear-gradient(135deg,#edf7f1 0%,#fbfaf6 64%,#f9eee1 100%);border-bottom:1px solid var(--line)}
        .breadcrumb{display:flex;gap:10px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:24px}
        .breadcrumb a{color:var(--teal-700)}
        .breadcrumb span{color:#a1b3ad}
        .hero-layout{display:grid;grid-template-columns:1.16fr .84fr;gap:70px;align-items:end}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--teal-700);font-size:13px;font-weight:800;letter-spacing:.08em}
        .eyebrow:before{content:"";width:24px;height:2px;background:var(--orange)}
        h1,h2,h3,p{margin-top:0}
        h1{font-size:clamp(34px,5vw,52px);line-height:1.18;letter-spacing:-.055em;color:var(--teal-950);margin:14px 0 18px}
        .hero-text{font-size:17px;color:#58706a;max-width:680px;margin-bottom:0}
        .hero-panel{background:var(--teal-950);color:#fff;border-radius:var(--radius);padding:26px;position:relative;overflow:hidden;box-shadow:var(--shadow)}
        .hero-panel:after{content:"PG";position:absolute;right:12px;bottom:-35px;font-size:140px;line-height:1;color:rgba(255,255,255,.06);font-weight:900}
        .hero-panel>*{position:relative;z-index:1}
        .panel-kicker{font-size:12px;color:#a8d5c7;letter-spacing:.12em}
        .hero-panel h2{font-size:25px;line-height:1.3;margin:10px 0}
        .hero-panel p{color:#c4ded5;font-size:14px;margin-bottom:18px}
        .panel-tags,.filter-row{display:flex;flex-wrap:wrap;gap:8px}
        .panel-tags span,.filter-row span{padding:6px 10px;border-radius:7px;background:rgba(255,255,255,.12);font-size:12px;color:#dff1eb}
        .section{padding:76px 0}
        .section-soft{background:var(--soft)}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}
        .section-head h2{color:var(--teal-950);font-size:31px;line-height:1.25;letter-spacing:-.04em;margin:8px 0 0}
        .section-head p{max-width:500px;color:var(--muted);margin:0}
        .filter-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;margin-bottom:25px;display:flex;align-items:center;justify-content:space-between;gap:18px}
        .filter-title{font-weight:800;color:var(--teal-900);white-space:nowrap}
        .filter-row span{background:var(--teal-50);color:var(--teal-700);border:1px solid #d5ebe2}
        .filter-row span.current{background:var(--teal-800);color:#fff;border-color:var(--teal-800)}
        .content-list{display:grid;grid-template-columns:1fr 1fr;gap:16px}
        .content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:22px;display:flex;flex-direction:column;min-height:205px;transition:.25s ease}
        .content-card:hover{transform:translateY(-4px);border-color:#a6cfc0;box-shadow:var(--shadow-sm)}
        .card-meta{display:flex;align-items:center;gap:10px;color:#8a9b96;font-size:12px;margin-bottom:13px}
        .tag{display:inline-flex;padding:4px 9px;border-radius:6px;background:var(--teal-50);color:var(--teal-700);font-size:12px;font-weight:700}
        .tag.orange{background:#fff0e4;color:var(--orange-dark)}
        .content-card h3{font-size:20px;line-height:1.4;color:var(--teal-950);margin-bottom:8px}
        .content-card p{font-size:14px;color:var(--muted);margin-bottom:17px}
        .read-link{color:var(--teal-700);font-weight:700;font-size:13px;margin-top:auto}
        .read-link:after{content:"  →";transition:.2s}
        .read-link:hover:after{margin-left:5px}
        .empty-state{grid-column:1/-1;padding:46px;text-align:center;border:1px dashed #bdd6cc;border-radius:var(--radius);color:var(--muted);background:#fff}
        .empty-state strong{display:block;color:var(--teal-900);font-size:18px;margin-bottom:5px}
        .feature-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:18px}
        .feature-card,.mini-card{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:28px;transition:.25s ease}
        .feature-card{min-height:245px;background:var(--teal-900);color:#fff;position:relative;overflow:hidden}
        .feature-card:after{content:"玩法";position:absolute;right:20px;bottom:-27px;font-size:100px;font-weight:900;color:rgba(255,255,255,.08)}
        .feature-card>*{position:relative;z-index:1}
        .feature-card h3{font-size:28px;line-height:1.3;margin:18px 0 10px}
        .feature-card p{color:#c9e1d8;max-width:520px}
        .feature-card .tag{background:rgba(255,255,255,.14);color:#e2f5ed}
        .mini-stack{display:grid;gap:18px}
        .mini-card{min-height:113px}
        .mini-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm)}
        .mini-card h3{font-size:18px;color:var(--teal-900);margin:9px 0 4px}
        .mini-card p{font-size:13px;color:var(--muted);margin:0}
        .scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
        .scenario{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:23px}
        .scenario-number{color:var(--orange-dark);font-size:13px;font-weight:900;letter-spacing:.1em}
        .scenario h3{color:var(--teal-900);font-size:19px;margin:12px 0 7px}
        .scenario p{color:var(--muted);font-size:14px;margin:0}
        .faq-list{max-width:850px;margin:0 auto}
        .faq-item{border-bottom:1px solid var(--line);background:#fff}
        .faq-item:first-child{border-top:1px solid var(--line);border-radius:12px 12px 0 0}
        .faq-item:last-child{border-radius:0 0 12px 12px}
        .faq-question{width:100%;padding:20px 22px;background:#fff;color:var(--teal-950);font-weight:800;text-align:left;display:flex;justify-content:space-between;align-items:center}
        .faq-question:after{content:"+";font-size:22px;color:var(--orange-dark);font-weight:400}
        .faq-question[aria-expanded="true"]:after{content:"−"}
        .faq-answer{display:none;padding:0 22px 20px;color:var(--muted);font-size:14px}
        .faq-answer.open{display:block}
        .cta-band{padding:38px 42px;border-radius:var(--radius);background:#f9eee1;border:1px solid #f0d8c0;display:flex;align-items:center;justify-content:space-between;gap:25px}
        .cta-band h2{font-size:27px;color:var(--teal-950);margin:0 0 7px}
        .cta-band p{margin:0;color:#756d64}
        .btn-primary{display:inline-flex;justify-content:center;align-items:center;background:var(--orange);color:#fff;border-radius:10px;padding:11px 18px;font-weight:700;box-shadow:0 7px 16px rgba(237,139,58,.2);transition:.2s ease}
        .btn-primary:hover{background:var(--orange-dark);color:#fff;transform:translateY(-2px)}
        .footer{background:var(--teal-950);color:#d7ebe4;padding:55px 0 22px}
        .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}
        .footer .brand{color:#fff}
        .footer-intro{color:#a7c7bc;max-width:275px;font-size:13px;margin:17px 0 0}
        .footer h3{font-size:15px;color:#fff;margin:5px 0 15px}
        .footer ul{list-style:none;padding:0;margin:0}
        .footer li{margin:8px 0}
        .footer li a{font-size:13px;color:#a7c7bc;transition:.2s}
        .footer li a:hover{color:#fff;padding-left:3px}
        .copyright{border-top:1px solid rgba(255,255,255,.13);margin-top:40px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#88aaa0;font-size:12px}
        :focus-visible{outline:3px solid rgba(237,139,58,.45);outline-offset:3px}
        @media (max-width:1024px){
            .nav-wrap{gap:15px}.main-nav a{padding:8px 8px;font-size:13px}
            .hero-layout{gap:35px}.feature-layout{grid-template-columns:1fr}.scenario-grid{grid-template-columns:repeat(2,1fr)}
        }
        @media (max-width:768px){
            .container{width:min(var(--container),calc(100% - 32px))}
            .topbar,.nav-wrap{height:68px}.menu-toggle{display:block;margin-left:auto}
            .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:12px 16px;box-shadow:var(--shadow-sm);flex-direction:column;align-items:stretch}
            .main-nav.show{display:flex}.main-nav a{padding:12px 14px}.main-nav .nav-cta{text-align:center;margin-top:4px}
            .hero-layout{grid-template-columns:1fr}.page-hero{padding:38px 0 42px}
            .hero-panel{margin-top:5px}.section{padding:58px 0}.section-head{display:block}.section-head p{margin-top:12px}
            .content-list{grid-template-columns:1fr}.filter-box{display:block}.filter-title{display:block;margin-bottom:12px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:28px}.copyright{display:block}.copyright span{display:block;margin-top:6px}
        }
        @media (max-width:520px){
            h1{font-size:36px}.hero-text{font-size:16px}.scenario-grid{grid-template-columns:1fr}
            .cta-band{padding:27px 23px;display:block}.cta-band h2{font-size:23px}.cta-band .btn-primary{width:100%;margin-top:20px}
            .footer-grid{grid-template-columns:1fr}.brand{font-size:18px}
        }

/* roulang page: category4 */
:root{
            --teal-950:#093b3a;
            --teal-900:#0b4d49;
            --teal-800:#0d625a;
            --teal-700:#16776b;
            --teal-100:#dff1eb;
            --teal-50:#eef8f4;
            --orange:#ed8b3a;
            --orange-dark:#ca6b25;
            --ink:#18302e;
            --muted:#6b7d79;
            --soft:#f5f7f4;
            --sand:#fbfaf6;
            --white:#fff;
            --line:#dce8e2;
            --shadow:0 16px 38px rgba(15,67,61,.09);
            --shadow-sm:0 7px 20px rgba(15,67,61,.07);
            --radius:18px;
            --radius-sm:11px;
            --container:1180px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--sand);line-height:1.7;font-size:15px}
        a{color:inherit;text-decoration:none}
        img{display:block;max-width:100%}
        button,input,textarea{font:inherit}
        button{cursor:pointer;border:0}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .topbar{height:76px;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
        .nav-wrap{height:76px;display:flex;align-items:center;gap:34px}
        .brand{display:inline-flex;align-items:center;gap:11px;white-space:nowrap;font-weight:800;font-size:20px;letter-spacing:-.03em;color:var(--teal-900)}
        .brand-mark{width:34px;height:34px;border-radius:10px;background:var(--teal-800);display:grid;place-items:center;color:#fff;font-weight:900;position:relative;overflow:hidden}
        .brand-mark:before,.brand-mark:after{content:"";position:absolute;border:2px solid rgba(255,255,255,.75);border-radius:50%}
        .brand-mark:before{width:22px;height:10px;transform:rotate(35deg)}
        .brand-mark:after{width:10px;height:22px;transform:rotate(35deg)}
        .main-nav{display:flex;align-items:center;gap:5px;margin-left:auto}
        .main-nav a{padding:9px 12px;border-radius:9px;color:#4d6762;font-size:14px;transition:.2s ease}
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{background:var(--teal-50);color:var(--teal-800)}
        .main-nav .nav-cta{background:var(--orange);color:#fff;font-weight:700;padding:11px 18px;box-shadow:0 7px 16px rgba(237,139,58,.2)}
        .main-nav .nav-cta:hover{background:var(--orange-dark);color:#fff;transform:translateY(-2px)}
        .menu-toggle{display:none;background:transparent;color:var(--teal-900);font-size:24px;padding:6px}
        .page-intro{padding:58px 0 50px;background:linear-gradient(135deg,#edf7f1,#fbfaf6 65%,#f9eee1)}
        .crumbs{display:flex;gap:10px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:24px}
        .crumbs a{color:var(--teal-700);font-weight:700}
        .crumbs span{color:#a2b4ae}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--teal-700);font-size:13px;font-weight:800;letter-spacing:.08em}
        .eyebrow:before{content:"";width:24px;height:2px;background:var(--orange)}
        h1,h2,h3,p{margin-top:0}
        h1{font-size:clamp(34px,5vw,52px);line-height:1.18;letter-spacing:-.05em;color:var(--teal-950);margin:14px 0 18px}
        .intro-copy{max-width:700px;color:#58706a;font-size:17px}
        .topic-bar{display:flex;gap:9px;flex-wrap:wrap;margin-top:27px}
        .tag{display:inline-flex;padding:5px 11px;border-radius:7px;background:var(--teal-50);color:var(--teal-700);font-size:12px;font-weight:700}
        .tag.orange{background:#fff0e4;color:var(--orange-dark)}
        .section{padding:78px 0}
        .section-soft{background:var(--soft)}
        .section-head{display:flex;justify-content:space-between;gap:25px;align-items:end;margin-bottom:28px}
        .section-head h2{font-size:30px;line-height:1.25;letter-spacing:-.04em;color:var(--teal-950);margin:9px 0 0}
        .section-head p{color:var(--muted);max-width:500px;margin-bottom:0}
        .text-link{color:var(--teal-700);font-weight:700;font-size:14px;white-space:nowrap}
        .text-link:after{content:" →";transition:.2s}
        .text-link:hover:after{margin-left:4px}
        .filter-row{display:flex;justify-content:space-between;align-items:center;gap:18px;border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:25px}
        .filter-row p{margin:0;color:var(--muted)}
        .filter-pills{display:flex;gap:8px;flex-wrap:wrap}
        .filter-pills span{padding:7px 12px;border:1px solid var(--line);border-radius:20px;color:var(--muted);font-size:13px;background:#fff}
        .filter-pills span.current{background:var(--teal-900);border-color:var(--teal-900);color:#fff}
        .news-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:20px}
        .news-list{display:grid;gap:13px}
        .news-card{display:grid;grid-template-columns:112px 1fr auto;gap:20px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px 22px;transition:.25s}
        .news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:#a6cfc0}
        .news-date{color:var(--teal-700);font-size:13px;font-weight:800}
        .news-card h3{font-size:18px;line-height:1.4;margin:5px 0 5px;color:var(--teal-950)}
        .news-card p{font-size:13px;color:var(--muted);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .arrow{font-size:22px;color:var(--orange);transition:.2s}
        .news-card:hover .arrow{transform:translateX(4px)}
        .feature-news{background:var(--teal-950);border-radius:var(--radius);padding:30px;color:#fff;min-height:100%;position:relative;overflow:hidden}
        .feature-news:after{content:"PG";position:absolute;right:-8px;bottom:-46px;font-size:150px;line-height:1;font-weight:900;color:rgba(255,255,255,.06)}
        .feature-news>*{position:relative;z-index:1}
        .feature-news h3{font-size:27px;line-height:1.3;margin:20px 0 14px}
        .feature-news p{color:#c5dfd5;line-height:1.8}
        .feature-news .tag{background:rgba(255,255,255,.14);color:#dff1eb}
        .feature-meta{display:flex;gap:16px;color:#a9c7be;font-size:13px;margin-top:28px}
        .support-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
        .support-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;transition:.25s}
        .support-card:hover{box-shadow:var(--shadow-sm);transform:translateY(-4px)}
        .support-icon{width:42px;height:42px;border-radius:12px;background:var(--teal-100);color:var(--teal-800);display:grid;place-items:center;font-weight:900;font-size:18px;margin-bottom:18px}
        .support-card h3{font-size:19px;color:var(--teal-950);margin-bottom:8px}
        .support-card p{color:var(--muted);font-size:14px;margin-bottom:0}
        .update-strip{display:grid;grid-template-columns:1fr 1fr;gap:18px}
        .update-panel{border-radius:var(--radius);padding:28px;background:#fff;border:1px solid var(--line)}
        .update-panel.dark{background:var(--teal-900);color:#fff;border-color:var(--teal-900)}
        .update-panel h3{font-size:21px;margin-bottom:14px}
        .update-panel p{color:var(--muted);margin-bottom:0}
        .update-panel.dark p{color:#c5dfd5}
        .update-line{display:flex;gap:12px;padding:11px 0;border-bottom:1px solid var(--line);font-size:14px}
        .update-panel.dark .update-line{border-color:rgba(255,255,255,.15)}
        .update-line:last-child{border-bottom:0}
        .dot{width:8px;height:8px;background:var(--orange);border-radius:50%;margin-top:9px;flex:none}
        .download-band{background:#123f3c;color:#fff;border-radius:var(--radius);padding:38px 42px;display:flex;align-items:center;justify-content:space-between;gap:30px}
        .download-band h2{font-size:29px;line-height:1.3;margin:10px 0}
        .download-band p{color:#c5dfd5;max-width:620px;margin-bottom:0}
        .btn-primary{display:inline-flex;align-items:center;justify-content:center;padding:12px 20px;border-radius:10px;background:var(--orange);color:#fff;font-weight:700;transition:.2s}
        .btn-primary:hover{background:var(--orange-dark);color:#fff;transform:translateY(-2px)}
        .faq-list{max-width:850px;margin:0 auto}
        .faq-item{border-bottom:1px solid var(--line)}
        .faq-item summary{list-style:none;padding:20px 5px;font-weight:800;color:var(--teal-950);cursor:pointer;display:flex;justify-content:space-between;gap:20px}
        .faq-item summary::-webkit-details-marker{display:none}
        .faq-item summary:after{content:"+";color:var(--orange);font-size:22px;line-height:1}
        .faq-item[open] summary:after{content:"−"}
        .faq-answer{color:var(--muted);padding:0 35px 20px 5px}
        .empty-state{background:#fff;border:1px dashed #b8d3c9;border-radius:var(--radius);padding:38px;text-align:center;color:var(--muted)}
        .cta-row{display:flex;align-items:center;justify-content:space-between;gap:25px;background:#fff1e6;border:1px solid #f2d3b8;border-radius:var(--radius);padding:27px 31px}
        .cta-row h2{font-size:24px;color:var(--teal-950);margin-bottom:5px}
        .cta-row p{margin:0;color:var(--muted)}
        .footer{background:var(--teal-950);color:#d7e8e1;padding:58px 0 22px}
        .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}
        .footer .brand{color:#fff}
        .footer-intro{color:#a9c7be;max-width:300px;margin-top:17px;font-size:14px}
        .footer h3{font-size:15px;color:#fff;margin-bottom:14px}
        .footer ul{list-style:none;padding:0;margin:0}
        .footer li{margin:8px 0;color:#a9c7be;font-size:14px}
        .footer li a:hover{color:#fff}
        .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:38px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#8eada4;font-size:12px}
        :focus-visible{outline:3px solid rgba(237,139,58,.5);outline-offset:3px}
        @media (max-width:1024px){
            .main-nav{gap:0}.main-nav a{padding:8px 8px;font-size:13px}
            .nav-wrap{gap:15px}.news-layout{grid-template-columns:1fr}.feature-news{min-height:230px}
        }
        @media (max-width:768px){
            .container{width:min(var(--container),calc(100% - 32px))}
            .topbar,.nav-wrap{height:68px}.menu-toggle{display:block;margin-left:auto}
            .main-nav{display:none;position:absolute;left:16px;right:16px;top:62px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:9px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
            .main-nav.open{display:flex}.main-nav a{padding:12px 14px}
            .page-intro{padding:43px 0 38px}.section{padding:58px 0}
            .section-head,.filter-row,.cta-row{display:block}.section-head p{margin-top:12px}
            .section-head .text-link{display:inline-block;margin-top:16px}
            .filter-pills{margin-top:15px}
            .news-card{grid-template-columns:1fr auto;gap:8px 15px}.news-date{grid-column:1/-1}
            .support-grid,.update-strip{grid-template-columns:1fr}
            .download-band{display:block;padding:30px 25px}.download-band .btn-primary{margin-top:22px;width:100%}
            .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
            .copyright{display:block}.copyright span{display:block;margin-top:7px}
        }
        @media (max-width:520px){
            h1{font-size:36px}.intro-copy{font-size:15px}
            .news-card{padding:17px}.feature-news{padding:24px}
            .footer-grid{grid-template-columns:1fr}
        }