/* roulang page: index */
:root{
            --primary:#12c7a5;
            --primary-deep:#0a9d86;
            --ink:#17211f;
            --deep:#10211e;
            --muted:#5d6b67;
            --soft:#8a9692;
            --line:#dde7e3;
            --mist:#f6f8f7;
            --mint:#eaf7f3;
            --white:#fff;
            --orange:#ff8a3d;
            --amber:#fff3df;
            --radius-lg:28px;
            --radius-md:20px;
            --radius-sm:14px;
            --shadow:0 14px 34px rgba(16,33,30,.08);
            --shadow-hover:0 18px 40px rgba(16,33,30,.13);
            --container:1200px;
        }
        *,*::before,*::after{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            color:var(--ink);
            background:var(--mist);
            font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
            font-size:16px;
            line-height:1.75;
            -webkit-font-smoothing:antialiased;
        }
        a{color:inherit;text-decoration:none}
        img{max-width:100%;display:block}
        button,input,textarea{font:inherit}
        button{cursor:pointer}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .site-header{
            position:sticky;top:0;z-index:50;
            background:rgba(255,255,255,.94);
            border-bottom:1px solid rgba(221,231,227,.85);
            backdrop-filter:blur(14px);
            transition:box-shadow .25s ease;
        }
        .nav-wrap{height:78px;display:flex;align-items:center;gap:30px}
        .brand{display:flex;align-items:center;gap:11px;min-width:255px}
        .brand-mark{
            width:42px;height:42px;border-radius:14px;background:var(--deep);
            display:grid;place-items:center;color:var(--primary);font-weight:800;
            letter-spacing:-2px;box-shadow:0 8px 20px rgba(16,33,30,.16);
        }
        .brand-text{font-size:17px;font-weight:800;line-height:1.25;letter-spacing:-.3px}
        .brand-text small{display:block;color:var(--soft);font-size:11px;font-weight:600;letter-spacing:1px;margin-top:2px}
        .main-nav{display:flex;align-items:center;gap:5px;flex:1}
        .main-nav a{
            padding:9px 14px;border-radius:999px;color:var(--muted);font-size:14px;
            transition:background .2s,color .2s,transform .2s;
        }
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--primary-deep);background:var(--mint)}
        .nav-action{white-space:nowrap;padding:12px 20px!important;background:var(--primary);color:var(--deep)!important;font-weight:800!important}
        .nav-action:hover{background:var(--primary-deep)!important;color:#fff!important;transform:translateY(-1px)}
        .menu-toggle{display:none;border:0;background:var(--mint);color:var(--deep);width:44px;height:44px;border-radius:12px;font-size:22px}
        .hero{
            position:relative;overflow:hidden;background:var(--mint);
            padding:82px 0 86px;border-bottom:1px solid #d7eee7;
        }
        .hero::before,.hero::after{content:"";position:absolute;border:1px solid rgba(18,199,165,.2);border-radius:50%}
        .hero::before{width:530px;height:530px;right:-160px;top:-260px}
        .hero::after{width:380px;height:380px;left:-250px;bottom:-270px}
        .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:72px}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--primary-deep);font-size:13px;font-weight:800;letter-spacing:.5px;margin-bottom:18px}
        .eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 5px rgba(255,138,61,.14)}
        h1,h2,h3,p{margin-top:0}
        h1{font-size:clamp(38px,4.4vw,56px);line-height:1.16;letter-spacing:-2px;margin-bottom:22px}
        .hero-copy{max-width:620px;color:var(--muted);font-size:18px;line-height:1.85;margin-bottom:30px}
        .button-row{display:flex;flex-wrap:wrap;gap:12px}
        .btn{
            display:inline-flex;align-items:center;justify-content:center;gap:8px;
            min-height:48px;padding:12px 22px;border:1px solid transparent;border-radius:15px;
            font-size:15px;font-weight:800;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s,color .2s;
        }
        .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
        .btn:focus-visible,.main-nav a:focus-visible,.faq-question:focus-visible{outline:3px solid rgba(18,199,165,.35);outline-offset:3px}
        .btn-primary{background:var(--primary);color:var(--deep)}
        .btn-primary:hover{background:var(--primary-deep);color:#fff}
        .btn-secondary{background:#fff;border-color:var(--line);color:var(--ink)}
        .btn-secondary:hover{border-color:var(--primary);color:var(--primary-deep)}
        .hero-note{display:flex;align-items:center;gap:10px;margin-top:20px;color:var(--soft);font-size:13px}
        .dot-check{width:20px;height:20px;border-radius:50%;display:grid;place-items:center;background:var(--primary);color:var(--deep);font-size:12px;font-weight:900}
        .app-preview{position:relative;min-height:420px;display:flex;align-items:center;justify-content:center}
        .preview-panel{
            width:min(410px,100%);background:#fff;border:1px solid rgba(221,231,227,.9);
            border-radius:30px;padding:24px;box-shadow:0 24px 55px rgba(16,33,30,.14);transform:rotate(2deg);
        }
        .preview-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
        .preview-brand{display:flex;align-items:center;gap:9px;font-weight:800}
        .mini-mark{width:30px;height:30px;display:grid;place-items:center;background:var(--deep);color:var(--primary);border-radius:10px;font-weight:800}
        .status{font-size:11px;color:var(--primary-deep);background:var(--mint);padding:5px 9px;border-radius:999px;font-weight:800}
        .screen{
            background:var(--deep);color:#fff;border-radius:22px;padding:24px 20px;
            min-height:190px;position:relative;overflow:hidden;
        }
        .screen::after{content:"";position:absolute;width:180px;height:180px;border:1px solid rgba(18,199,165,.32);border-radius:50%;right:-45px;top:-65px}
        .screen-label{font-size:12px;color:#9ec8be;margin-bottom:10px}
        .screen h3{font-size:25px;line-height:1.35;margin-bottom:14px;position:relative;z-index:1}
        .screen-line{height:8px;background:rgba(255,255,255,.14);border-radius:10px;width:72%;margin-bottom:9px}
        .screen-line.short{width:48%}
        .preview-items{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}
        .preview-item{height:58px;background:var(--mint);border-radius:14px;padding:9px;color:var(--deep)}
        .preview-item b{display:block;font-size:12px}.preview-item span{font-size:10px;color:var(--muted)}
        .download-float{
            position:absolute;bottom:15px;left:10px;background:#fff;border:1px solid var(--line);
            border-radius:18px;padding:14px 16px;box-shadow:var(--shadow);display:flex;gap:12px;align-items:center
        }
        .float-icon{width:40px;height:40px;background:#fff0e7;color:var(--orange);display:grid;place-items:center;border-radius:12px;font-weight:900}
        .download-float strong{display:block;font-size:13px}.download-float small{color:var(--soft);font-size:11px}
        .section{padding:94px 0}
        .section-tight{padding:68px 0}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:34px}
        .section-kicker{color:var(--primary-deep);font-size:13px;font-weight:900;letter-spacing:1px;margin-bottom:9px}
        h2{font-size:34px;line-height:1.25;letter-spacing:-1px;margin-bottom:10px}
        .section-intro{color:var(--muted);max-width:620px;margin:0}
        .text-link{color:var(--primary-deep);font-weight:800;font-size:14px;white-space:nowrap}
        .text-link:hover{color:var(--orange)}
        .trust-strip{background:#fff;border-bottom:1px solid var(--line);padding:20px 0}
        .trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
        .trust-item{display:flex;gap:13px;padding:8px 24px;border-right:1px solid var(--line)}
        .trust-item:first-child{padding-left:0}.trust-item:last-child{border:0}
        .trust-icon{width:38px;height:38px;flex:0 0 38px;border-radius:12px;background:var(--mint);color:var(--primary-deep);display:grid;place-items:center;font-weight:900}
        .trust-item strong{display:block;font-size:14px}.trust-item span{display:block;color:var(--soft);font-size:12px;line-height:1.5}
        .download-section{background:#fff}
        .download-layout{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center}
        .download-intro{color:var(--muted);max-width:510px;margin-bottom:24px}
        .download-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}
        .download-card{border:1px solid var(--line);border-radius:18px;padding:18px;background:var(--mist);transition:transform .2s,box-shadow .2s,border-color .2s}
        .download-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow)}
        .system-head{display:flex;align-items:center;gap:10px;margin-bottom:13px}
        .system-icon{width:34px;height:34px;border-radius:10px;background:var(--deep);color:var(--primary);display:grid;place-items:center;font-weight:900;font-size:13px}
        .system-head strong{font-size:15px}.system-head small{display:block;color:var(--soft);font-size:11px}
        .version{color:var(--muted);font-size:12px;margin-bottom:14px;line-height:1.65}
        .version b{color:var(--ink);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
        .btn-small{width:100%;min-height:42px;padding:8px 12px;font-size:13px;border-radius:12px}
        .qr-area{background:var(--mint);border-radius:24px;padding:30px;display:flex;align-items:center;gap:28px;min-height:265px}
        .qr-box{width:142px;height:142px;flex:0 0 142px;background:#fff;border:8px solid #fff;box-shadow:0 0 0 1px var(--line);display:grid;place-items:center;position:relative}
        .qr-box::before{content:"";width:85px;height:85px;background:repeating-linear-gradient(45deg,var(--deep) 0 5px,#fff 5px 10px);opacity:.85}
        .qr-box::after{content:"二维码";position:absolute;background:#fff;color:var(--muted);font-size:11px;padding:2px 5px}
        .qr-copy h3{font-size:21px;margin-bottom:8px}.qr-copy p{color:var(--muted);font-size:14px;margin-bottom:0}
        .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
        .step{position:relative;padding:25px 22px;background:#fff;border:1px solid var(--line);border-radius:20px}
        .step-num{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--deep);color:var(--primary);font-weight:900;margin-bottom:18px}
        .step h3{font-size:17px;margin-bottom:7px}.step p{font-size:13px;color:var(--muted);margin:0}
        .step:not(:last-child)::after{content:"";position:absolute;right:-18px;top:42px;width:35px;border-top:1px dashed #a9cfc5}
        .updates-section{background:var(--deep);color:#fff}
        .updates-section .section-kicker{color:var(--primary)}.updates-section .section-intro{color:#a9bcb7}
        .updates-section .text-link{color:#7fe4d1}
        .news-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
        .news-card{display:flex;gap:18px;padding:22px;background:#17312c;border:1px solid rgba(167,216,204,.16);border-radius:19px;transition:.2s}
        .news-card:hover{border-color:var(--primary);transform:translateY(-3px);background:#1b3933}
        .news-date{flex:0 0 70px;color:var(--primary);font-size:12px;font-weight:800;padding-top:3px}
        .news-meta{display:flex;gap:8px;align-items:center;color:#8eaaa3;font-size:11px;margin-bottom:6px}
        .tag{display:inline-flex;align-items:center;padding:4px 9px;border-radius:999px;background:var(--mint);color:var(--primary-deep);font-size:11px;font-weight:800}
        .updates-section .tag{background:rgba(18,199,165,.15);color:#8ce7d6}
        .news-card h3{font-size:16px;margin-bottom:5px;line-height:1.45}.news-card p{color:#a9bcb7;font-size:13px;line-height:1.6;margin:0}
        .empty-state{grid-column:1/-1;text-align:center;padding:44px;border:1px dashed rgba(167,216,204,.35);border-radius:20px;color:#a9bcb7}
        .empty-icon{font-size:28px;color:var(--primary);margin-bottom:8px}.empty-state p{margin:0}
        .topic-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;grid-template-rows:1fr 1fr;gap:14px}
        .topic-card{position:relative;overflow:hidden;min-height:176px;padding:26px;border-radius:22px;background:#fff;border:1px solid var(--line);transition:.2s}
        .topic-card:first-child{grid-row:span 2;background:var(--deep);color:#fff}
        .topic-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--primary)}
        .topic-card .topic-no{color:var(--orange);font-size:12px;font-weight:900;margin-bottom:22px}
        .topic-card h3{font-size:21px;margin-bottom:7px}.topic-card p{color:var(--muted);font-size:13px;margin:0;line-height:1.65}
        .topic-card:first-child p{color:#a9bcb7}
        .topic-mark{position:absolute;right:22px;bottom:16px;font-size:46px;color:rgba(18,199,165,.12);font-weight:900}
        .experience{background:var(--mint)}
        .experience-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:60px;align-items:center}
        .experience-copy p{color:var(--muted)}
        .experience-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:25px}
        .experience-list div{padding:17px 18px;background:#fff;border-radius:16px;border:1px solid rgba(221,231,227,.8)}
        .experience-list strong{display:block;font-size:15px;margin-bottom:3px}.experience-list span{font-size:12px;color:var(--muted)}
        .devices{display:flex;align-items:end;justify-content:center;gap:22px}
        .device{background:var(--deep);border:7px solid #fff;box-shadow:var(--shadow-hover);border-radius:30px;width:190px;height:350px;padding:18px 13px;color:#fff}
        .device.small{width:145px;height:275px;opacity:.88}
        .device-notch{width:60px;height:7px;border-radius:9px;background:#314b45;margin:0 auto 28px}
        .device-label{font-size:11px;color:#8fe4d4;margin-bottom:14px}.device h3{font-size:20px;line-height:1.3}.device-lines i{display:block;height:10px;background:#2b4942;border-radius:5px;margin:13px 0}.device-lines i:nth-child(2){width:70%}.device-lines i:nth-child(3){width:52%}
        .guide-section{background:#fff}
        .guide-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:70px;align-items:start}
        .guide-card{background:var(--deep);border-radius:24px;color:#fff;padding:30px;position:relative;overflow:hidden}
        .guide-card::after{content:"PG";position:absolute;right:-10px;bottom:-28px;color:rgba(18,199,165,.12);font-size:130px;font-weight:900}
        .guide-card h3{font-size:24px;position:relative;z-index:1}.guide-card p{color:#a9bcb7;font-size:14px;position:relative;z-index:1}
        .guide-lines{position:relative;z-index:1;border-top:1px solid rgba(255,255,255,.16);padding-top:18px;color:#d9eee9;font-size:13px;line-height:2}
        .guide-lines span{color:var(--primary);font-weight:900;margin-right:7px}
        .mini-steps{display:grid;grid-template-columns:1fr 1fr;gap:12px}
        .mini-step{display:flex;gap:13px;padding:18px;border:1px solid var(--line);border-radius:17px;background:var(--mist)}
        .mini-step b{width:30px;height:30px;display:grid;place-items:center;border-radius:10px;background:var(--mint);color:var(--primary-deep);font-size:13px;flex:0 0 30px}
        .mini-step strong{display:block;font-size:14px}.mini-step span{display:block;color:var(--muted);font-size:12px;line-height:1.55}
        .popular{background:var(--mist)}
        .popular-grid{display:grid;grid-template-columns:1.25fr .75fr .75fr;grid-template-rows:1fr 1fr;gap:14px}
        .popular-card{padding:23px;background:#fff;border:1px solid var(--line);border-radius:19px;transition:.2s}
        .popular-card:first-child{grid-row:span 2;background:linear-gradient(145deg,#fff,#eaf7f3)}
        .popular-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--primary)}
        .popular-card h3{font-size:18px;margin:18px 0 7px}.popular-card p{font-size:13px;color:var(--muted);margin:0}.popular-card .tag{background:#fff1e7;color:#d86d27}
        .timeline-section{background:#fff}
        .timeline{max-width:880px;border-left:2px solid #cce8e0;margin:12px 0 0 15px}
        .timeline-item{position:relative;padding:0 0 26px 33px}.timeline-item:last-child{padding-bottom:0}
        .timeline-item::before{content:"";position:absolute;width:13px;height:13px;border-radius:50%;background:var(--primary);border:4px solid var(--mint);left:-8px;top:5px}
        .timeline-top{display:flex;gap:10px;align-items:center;margin-bottom:5px}.timeline-date{font-size:12px;color:var(--soft);font-family:ui-monospace,monospace}
        .timeline-item h3{font-size:16px;margin:0 0 4px}.timeline-item p{font-size:13px;color:var(--muted);margin:0}
        .faq-section{background:var(--mist)}
        .faq-list{max-width:900px;margin:0 auto;display:grid;gap:10px}
        .faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
        .faq-question{width:100%;border:0;background:#fff;text-align:left;padding:20px 24px;display:flex;justify-content:space-between;align-items:center;color:var(--ink);font-weight:800;font-size:15px}
        .faq-question span:last-child{font-size:22px;color:var(--primary-deep);font-weight:400}
        .faq-answer{padding:0 24px 20px;color:var(--muted);font-size:14px;line-height:1.75}
        .cta-section{padding:72px 0;background:var(--deep);color:#fff}
        .cta-box{display:flex;align-items:center;justify-content:space-between;gap:30px}
        .cta-box h2{margin-bottom:8px}.cta-box p{color:#a9bcb7;margin:0;font-size:14px}
        .cta-box .button-row{flex-shrink:0}
        .site-footer{background:#0b1816;color:#c7d8d3;padding:58px 0 22px}
        .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:45px}
        .footer-brand{margin-bottom:14px}.footer-description{color:#8fa49e;font-size:13px;max-width:300px;line-height:1.7}
        .footer-title{color:#fff;font-size:14px;font-weight:800;margin-bottom:14px}
        .footer-links{display:grid;gap:7px}.footer-links a{color:#8fa49e;font-size:13px;transition:.2s}.footer-links a:hover{color:var(--primary)}
        .footer-note{padding:15px 17px;border-radius:14px;background:#142823;color:#a9bcb7;font-size:12px;line-height:1.65}
        .copyright{border-top:1px solid rgba(255,255,255,.1);padding-top:19px;color:#718982;font-size:12px;display:flex;justify-content:space-between;gap:20px}
        @media(max-width:1024px){
            .brand{min-width:220px}.main-nav{gap:0}.main-nav a{padding:8px 9px;font-size:13px}
            .hero-grid{gap:40px}.section{padding:76px 0}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}
        }
        @media(max-width:768px){
            .container{width:min(var(--container),calc(100% - 36px))}
            .nav-wrap{height:70px}.brand-text{font-size:15px}.brand{min-width:0;flex:1}
            .main-nav{display:none;position:absolute;left:18px;right:18px;top:78px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
            .main-nav.open{display:flex}.main-nav a{padding:12px 15px}.nav-action{margin-top:5px;text-align:center}
            .menu-toggle{display:block}.nav-wrap>.nav-action{display:none}
            .hero{padding:58px 0 64px}.hero-grid,.download-layout,.experience-grid,.guide-layout{grid-template-columns:1fr;gap:38px}
            h1{font-size:38px;letter-spacing:-1.3px}.hero-copy{font-size:16px}.app-preview{min-height:370px}
            .trust-grid{grid-template-columns:1fr 1fr;gap:12px}.trust-item{padding:12px 0;border:0}
            .section{padding:64px 0}.section-head{display:block;margin-bottom:25px}.section-head .text-link{display:inline-block;margin-top:14px}
            .steps{grid-template-columns:1fr 1fr}.step:not(:last-child)::after{display:none}
            .news-list{grid-template-columns:1fr}.topic-grid{grid-template-columns:1fr 1fr;grid-template-rows:auto}.topic-card:first-child{grid-row:auto;grid-column:span 2}
            .popular-grid{grid-template-columns:1fr 1fr;grid-template-rows:auto}.popular-card:first-child{grid-row:auto;grid-column:span 2}
            .cta-box{display:block}.cta-box .button-row{margin-top:24px}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}
        }
        @media(max-width:520px){
            .container{width:calc(100% - 28px)}.brand-mark{width:38px;height:38px}.brand-text small{display:none}
            h1{font-size:32px}.hero .button-row .btn{width:100%}.app-preview{min-height:335px}.preview-panel{padding:18px}.download-float{left:0;bottom:0}
            .download-cards,.steps,.experience-list,.mini-steps,.trust-grid,.topic-grid,.popular-grid{grid-template-columns:1fr}
            .topic-card:first-child,.popular-card:first-child{grid-column:auto}.qr-area{display:block;padding:22px}.qr-box{margin:0 auto 18px}
            .news-card{display:block}.news-date{margin-bottom:8px}.devices{gap:8px}.device{width:165px;height:310px}.device.small{width:110px;height:235px}
            .footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin-top:7px}
            .faq-question{padding:18px;font-size:14px}.faq-answer{padding:0 18px 18px}
        }

/* roulang page: article */
:root{
            --primary:#12c7a5;
            --primary-deep:#0a9d86;
            --ink:#17211f;
            --deep:#10211e;
            --muted:#5d6b67;
            --soft:#8a9692;
            --line:#dde7e3;
            --mist:#f6f8f7;
            --mint:#eaf7f3;
            --white:#fff;
            --orange:#ff8a3d;
            --amber:#fff3df;
            --radius-lg:28px;
            --radius-md:20px;
            --radius-sm:14px;
            --shadow:0 14px 34px rgba(16,33,30,.08);
            --shadow-hover:0 18px 40px rgba(16,33,30,.13);
            --container:1200px;
        }

        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            color:var(--ink);
            background:var(--mist);
            font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
            font-size:16px;
            line-height:1.75;
            -webkit-font-smoothing:antialiased;
        }
        a{color:inherit;text-decoration:none}
        img{display:block;max-width:100%}
        button{font:inherit;cursor:pointer}
        h1,h2,h3,p{margin-top:0}
        h1,h2,h3{color:var(--deep);letter-spacing:-.04em}
        h1{font-size:46px;line-height:1.2;margin-bottom:20px}
        h2{font-size:30px;line-height:1.35;margin-bottom:12px}
        h3{font-size:20px;line-height:1.45;margin-bottom:8px}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}

        .site-header{
            position:sticky;
            top:0;
            z-index:50;
            background:rgba(255,255,255,.95);
            border-bottom:1px solid rgba(221,231,227,.88);
            backdrop-filter:blur(14px);
            transition:box-shadow .25s ease;
        }
        .site-header.is-scrolled{box-shadow:0 8px 24px rgba(16,33,30,.08)}
        .nav-wrap{height:78px;display:flex;align-items:center;gap:30px}
        .brand{display:flex;align-items:center;gap:11px;min-width:255px}
        .brand-mark{
            width:42px;height:42px;border-radius:14px;background:var(--deep);
            display:grid;place-items:center;color:var(--primary);
            font-weight:800;letter-spacing:-2px;
            box-shadow:0 8px 20px rgba(16,33,30,.16);
        }
        .brand-text{font-size:17px;font-weight:800;line-height:1.25;letter-spacing:-.3px}
        .brand-text small{
            display:block;color:var(--soft);font-size:11px;font-weight:600;
            letter-spacing:1px;margin-top:2px;
        }
        .main-nav{display:flex;align-items:center;gap:5px;flex:1}
        .main-nav a{
            padding:9px 14px;border-radius:999px;color:var(--muted);
            font-size:14px;transition:background .2s,color .2s,transform .2s;
        }
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{
            color:var(--primary-deep);background:var(--mint);
        }
        .main-nav .nav-action{
            white-space:nowrap;padding:12px 20px!important;
            background:var(--primary);color:var(--deep)!important;font-weight:800!important;
        }
        .main-nav .nav-action:hover{
            background:var(--primary-deep)!important;color:#fff!important;
            transform:translateY(-1px);
        }
        .menu-toggle{
            display:none;border:0;background:var(--mint);color:var(--deep);
            width:44px;height:44px;border-radius:12px;font-size:22px;
        }

        .article-top{
            background:var(--mint);
            border-bottom:1px solid #d7eee7;
            padding:58px 0 62px;
            position:relative;
            overflow:hidden;
        }
        .article-top:after{
            content:"";
            position:absolute;
            width:420px;height:420px;
            right:-180px;top:-250px;
            border:1px solid rgba(18,199,165,.2);
            border-radius:50%;
        }
        .breadcrumbs{
            display:flex;align-items:center;flex-wrap:wrap;gap:8px;
            color:var(--soft);font-size:13px;margin-bottom:24px;
            position:relative;z-index:1;
        }
        .breadcrumbs a{color:var(--primary-deep);font-weight:700}
        .breadcrumbs .separator{color:#a7b8b2}
        .article-heading{max-width:900px;position:relative;z-index:1}
        .article-label{
            display:inline-flex;align-items:center;gap:8px;
            color:var(--primary-deep);font-size:13px;font-weight:900;
            margin-bottom:14px;
        }
        .article-label:before{
            content:"";width:8px;height:8px;border-radius:50%;
            background:var(--orange);box-shadow:0 0 0 5px rgba(255,138,61,.14);
        }
        .article-heading h1{max-width:850px;margin-bottom:17px}
        .article-description{
            max-width:780px;color:var(--muted);font-size:17px;
            line-height:1.85;margin-bottom:22px;
        }
        .article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px;color:var(--soft);font-size:13px}
        .meta-chip{
            display:inline-flex;align-items:center;min-height:30px;
            padding:4px 11px;border-radius:999px;background:#fff;
            border:1px solid var(--line);color:var(--primary-deep);font-weight:700;
        }

        .reading-section{padding:70px 0 88px}
        .reading-layout{
            display:grid;grid-template-columns:minmax(0,850px) 250px;
            gap:58px;align-items:start;justify-content:center;
        }
        .article-content{
            min-width:0;background:var(--white);border:1px solid var(--line);
            border-radius:var(--radius-lg);padding:42px 48px;
            box-shadow:var(--shadow);
        }
        .article-content h2{font-size:28px;margin:34px 0 15px}
        .article-content h3{font-size:21px;margin:27px 0 11px}
        .article-content p{color:#3d4c48;font-size:17px;line-height:1.95;margin-bottom:20px}
        .article-content ul,.article-content ol{padding-left:25px;margin:14px 0 24px;color:#3d4c48}
        .article-content li{padding-left:5px;margin:8px 0;line-height:1.8}
        .article-content blockquote{
            margin:26px 0;padding:20px 24px;background:var(--mint);
            border-left:4px solid var(--primary);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
            color:var(--deep);font-weight:600;
        }
        .article-content img{border-radius:18px;margin:28px auto}
        .article-content table{
            width:100%;border-collapse:collapse;margin:25px 0;
            font-size:15px;background:#fff;
        }
        .article-content th,.article-content td{
            padding:12px 14px;border:1px solid var(--line);text-align:left;
        }
        .article-content th{background:var(--mint);color:var(--deep)}
        .article-content a{color:var(--primary-deep);font-weight:700}
        .article-content a:hover{color:var(--orange)}
        .empty-state{
            text-align:center;padding:42px 20px;color:var(--muted);
            background:var(--mist);border:1px dashed #cbdad5;border-radius:18px;
        }
        .empty-icon{
            width:48px;height:48px;margin:0 auto 13px;border-radius:16px;
            display:grid;place-items:center;background:var(--mint);
            color:var(--primary-deep);font-size:22px;font-weight:800;
        }
        .empty-state p{font-size:16px;margin-bottom:18px}
        .side-panel{position:sticky;top:105px}
        .toc-card{
            background:#fff;border:1px solid var(--line);border-radius:20px;
            padding:22px;box-shadow:var(--shadow);
        }
        .toc-title{
            color:var(--deep);font-size:14px;font-weight:900;
            padding-bottom:13px;border-bottom:1px solid var(--line);
        }
        .toc-list{list-style:none;margin:13px 0 0;padding:0}
        .toc-list li{border-bottom:1px solid #edf2f0}
        .toc-list li:last-child{border:0}
        .toc-list a{
            display:block;padding:9px 0;color:var(--muted);font-size:13px;
            transition:color .2s,padding .2s;
        }
        .toc-list a:hover{color:var(--primary-deep);padding-left:4px}
        .note-card{
            margin-top:15px;padding:20px;border-radius:20px;
            background:var(--deep);color:#d9e8e3;
        }
        .note-card strong{display:block;color:var(--primary);font-size:15px;margin-bottom:6px}
        .note-card p{font-size:13px;line-height:1.7;margin:0}

        .related-section{padding:0 0 82px}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:24px}
        .section-kicker{
            color:var(--primary-deep);font-size:13px;font-weight:900;
            letter-spacing:1px;margin-bottom:7px;
        }
        .section-intro{color:var(--muted);max-width:620px;margin:0}
        .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
        .related-card{
            display:block;background:#fff;border:1px solid var(--line);
            border-radius:20px;padding:23px;transition:transform .2s,box-shadow .2s,border-color .2s;
        }
        .related-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-hover)}
        .related-tag{
            display:inline-flex;padding:5px 10px;border-radius:999px;
            background:var(--mint);color:var(--primary-deep);font-size:12px;font-weight:800;
            margin-bottom:17px;
        }
        .related-card h3{font-size:18px;margin-bottom:8px}
        .related-card p{color:var(--muted);font-size:14px;line-height:1.7;margin-bottom:16px}
        .related-date{font-size:12px;color:var(--soft)}

        .article-actions{
            padding:54px 0 76px;background:var(--deep);color:#fff;
        }
        .action-panel{
            display:flex;justify-content:space-between;align-items:center;gap:30px;
        }
        .action-panel h2{color:#fff;margin-bottom:8px}
        .action-panel p{color:#b9cbc5;margin:0;max-width:640px}
        .button-row{display:flex;flex-wrap:wrap;gap:12px}
        .btn{
            display:inline-flex;align-items:center;justify-content:center;gap:8px;
            min-height:48px;padding:12px 22px;border:1px solid transparent;
            border-radius:15px;font-size:15px;font-weight:800;
            transition:transform .2s,box-shadow .2s,background .2s,border-color .2s,color .2s;
        }
        .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
        .btn:focus-visible,.main-nav a:focus-visible,.menu-toggle:focus-visible{
            outline:3px solid rgba(18,199,165,.35);outline-offset:3px;
        }
        .btn-primary{background:var(--primary);color:var(--deep)}
        .btn-primary:hover{background:var(--primary-deep);color:#fff}
        .btn-secondary{background:#fff;border-color:var(--line);color:var(--ink)}
        .btn-secondary:hover{border-color:var(--primary);color:var(--primary-deep)}
        .btn-dark{background:transparent;border-color:rgba(255,255,255,.28);color:#fff}
        .btn-dark:hover{border-color:var(--primary);color:var(--primary)}

        .site-footer{background:#0b1917;color:#d7e4e0;padding:58px 0 24px}
        .footer-grid{display:grid;grid-template-columns:1.5fr .8fr .8fr 1fr;gap:38px}
        .footer-brand{color:#fff;margin-bottom:17px}
        .footer-description{color:#9eb2ac;font-size:13px;line-height:1.8;max-width:300px}
        .footer-title{color:#fff;font-size:14px;font-weight:800;margin-bottom:15px}
        .footer-links{display:grid;gap:8px}
        .footer-links a{color:#9eb2ac;font-size:13px;transition:color .2s}
        .footer-links a:hover{color:var(--primary)}
        .footer-note{color:#9eb2ac;font-size:13px;line-height:1.8}
        .copyright{
            display:flex;justify-content:space-between;gap:20px;
            border-top:1px solid rgba(255,255,255,.12);
            margin-top:40px;padding-top:20px;color:#78908a;font-size:12px;
        }

        @media (max-width:1024px){
            .nav-wrap{gap:16px}
            .brand{min-width:235px}
            .main-nav a{padding:8px 9px;font-size:13px}
            .reading-layout{grid-template-columns:minmax(0,1fr) 220px;gap:28px}
            .footer-grid{grid-template-columns:1.3fr 1fr 1fr}
            .footer-grid>div:last-child{grid-column:span 3}
        }
        @media (max-width:768px){
            .container{width:min(var(--container),calc(100% - 36px))}
            h1{font-size:34px}
            h2{font-size:26px}
            .nav-wrap{height:70px;justify-content:space-between}
            .brand{min-width:0}
            .brand-text{font-size:15px}
            .brand-text small{font-size:10px}
            .menu-toggle{display:block}
            .main-nav{
                display:none;position:absolute;top:70px;left:0;right:0;
                padding:14px 18px 18px;background:#fff;border-bottom:1px solid var(--line);
                box-shadow:0 14px 25px rgba(16,33,30,.08);flex-direction:column;align-items:stretch;
            }
            .main-nav.is-open{display:flex}
            .main-nav a{padding:12px 14px;border-radius:12px}
            .main-nav .nav-action{text-align:center;margin-top:6px}
            .article-top{padding:45px 0 48px}
            .article-heading h1{font-size:34px}
            .reading-section{padding:48px 0 62px}
            .reading-layout{display:block}
            .side-panel{position:static;margin-top:22px}
            .toc-card{padding:19px}
            .article-content{padding:28px 23px;border-radius:20px}
            .article-content p{font-size:16px}
            .related-grid{grid-template-columns:1fr}
            .action-panel{display:block}
            .action-panel .button-row{margin-top:24px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
            .footer-grid>div:last-child{grid-column:span 2}
            .copyright{display:block;line-height:2}
        }
        @media (max-width:520px){
            .container{width:calc(100% - 30px)}
            .brand-mark{width:38px;height:38px;border-radius:12px}
            .brand-text{max-width:210px;font-size:14px}
            .article-heading h1{font-size:30px}
            .article-description{font-size:15px}
            .article-content{padding:24px 18px}
            .article-content h2{font-size:24px}
            .article-content h3{font-size:19px}
            .article-content p{font-size:15px;line-height:1.85}
            .article-content table{display:block;overflow-x:auto;white-space:nowrap}
            .action-panel .button-row .btn{width:100%}
            .footer-grid{grid-template-columns:1fr}
            .footer-grid>div:last-child{grid-column:auto}
        }

/* roulang page: category1 */
:root{
            --primary:#12c7a5;
            --primary-deep:#0a9d86;
            --ink:#17211f;
            --deep:#10211e;
            --muted:#5d6b67;
            --soft:#8a9692;
            --line:#dde7e3;
            --mist:#f6f8f7;
            --mint:#eaf7f3;
            --white:#fff;
            --orange:#ff8a3d;
            --amber:#fff3df;
            --radius-lg:28px;
            --radius-md:20px;
            --radius-sm:14px;
            --shadow:0 14px 34px rgba(16,33,30,.08);
            --shadow-hover:0 18px 40px rgba(16,33,30,.13);
            --container:1200px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;color:var(--ink);background:var(--mist);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
        a{color:inherit;text-decoration:none}
        img{max-width:100%;display:block}
        button{font:inherit;cursor:pointer}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);border-bottom:1px solid rgba(221,231,227,.85);backdrop-filter:blur(14px)}
        .nav-wrap{height:78px;display:flex;align-items:center;gap:30px}
        .brand{display:flex;align-items:center;gap:11px;min-width:255px}
        .brand-mark{width:42px;height:42px;border-radius:14px;background:var(--deep);display:grid;place-items:center;color:var(--primary);font-weight:800;letter-spacing:-2px;box-shadow:0 8px 20px rgba(16,33,30,.16)}
        .brand-text{font-size:17px;font-weight:800;line-height:1.25;letter-spacing:-.3px}
        .brand-text small{display:block;color:var(--soft);font-size:11px;font-weight:600;letter-spacing:1px;margin-top:2px}
        .main-nav{display:flex;align-items:center;gap:5px;flex:1}
        .main-nav a{padding:9px 14px;border-radius:999px;color:var(--muted);font-size:14px;transition:background .2s,color .2s,transform .2s}
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--primary-deep);background:var(--mint)}
        .main-nav .nav-action{white-space:nowrap;padding:12px 20px;background:var(--primary);color:var(--deep);font-weight:800}
        .main-nav .nav-action:hover{background:var(--primary-deep);color:#fff;transform:translateY(-1px)}
        .menu-toggle{display:none;border:0;background:var(--mint);color:var(--deep);width:44px;height:44px;border-radius:12px;font-size:22px}
        .page-hero{padding:76px 0 72px;background:var(--mint);border-bottom:1px solid #d7eee7}
        .hero-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:70px;align-items:center}
        .eyebrow,.section-kicker{color:var(--primary-deep);font-size:13px;font-weight:900;letter-spacing:.8px}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:16px}
        .eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 5px rgba(255,138,61,.14)}
        h1,h2,h3,p{margin-top:0}
        h1{font-size:clamp(34px,4vw,52px);line-height:1.2;letter-spacing:-1.5px;margin-bottom:20px}
        h2{font-size:32px;line-height:1.3;letter-spacing:-.8px;margin-bottom:12px}
        h3{font-size:20px;line-height:1.4;margin-bottom:8px}
        .lead{max-width:700px;color:var(--muted);font-size:18px;line-height:1.85;margin-bottom:0}
        .hero-badge{background:#fff;border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:var(--shadow);position:relative}
        .badge-circle{width:74px;height:74px;border-radius:24px;background:var(--deep);color:var(--primary);display:grid;place-items:center;font-size:30px;font-weight:900;margin-bottom:20px}
        .hero-badge strong{display:block;font-size:21px;margin-bottom:7px}
        .hero-badge p{color:var(--muted);font-size:14px;margin-bottom:18px}
        .status{display:flex;align-items:center;gap:8px;color:var(--primary-deep);font-size:13px;font-weight:800}
        .status i{width:9px;height:9px;border-radius:50%;background:var(--primary);display:inline-block}
        .section{padding:88px 0}
        .section-white{background:#fff}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:30px}
        .section-kicker{margin-bottom:8px}
        .section-intro{max-width:650px;color:var(--muted);margin-bottom:0}
        .overview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
        .info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:25px;transition:.25s}
        .info-card:hover,.topic-card:hover,.check-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow)}
        .info-icon{width:42px;height:42px;border-radius:13px;background:var(--mint);color:var(--primary-deep);display:grid;place-items:center;font-weight:900;margin-bottom:18px}
        .info-card p,.topic-card p{color:var(--muted);font-size:14px;margin-bottom:0}
        .verification-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
        .verify-item{display:grid;grid-template-columns:48px 1fr auto;gap:17px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px 22px;transition:.25s}
        .verify-item:hover{border-color:var(--primary);box-shadow:var(--shadow)}
        .verify-number{width:44px;height:44px;border-radius:50%;background:var(--deep);color:var(--primary);display:grid;place-items:center;font-weight:900}
        .verify-item strong{display:block;font-size:17px}
        .verify-item span{color:var(--muted);font-size:13px}
        .verify-state{padding:5px 10px;border-radius:999px;background:var(--mint);color:var(--primary-deep);font-size:12px;font-weight:800;white-space:nowrap}
        .scene-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:24px;align-items:stretch}
        .scene-panel{background:var(--deep);color:#fff;border-radius:var(--radius-lg);padding:32px}
        .scene-panel p{color:#b8cbc5;font-size:15px}
        .scene-line{display:flex;gap:14px;padding:15px 0;border-bottom:1px solid rgba(255,255,255,.12)}
        .scene-line:last-child{border:0}
        .scene-dot{color:var(--primary);font-weight:900}
        .scene-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:18px 28px}
        .scene-list article{padding:21px 0;border-bottom:1px solid var(--line)}
        .scene-list article:last-child{border:0}
        .scene-list h3{margin-bottom:5px}
        .scene-list p{color:var(--muted);font-size:14px;margin-bottom:0}
        .check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
        .check-card{background:var(--mint);border:1px solid transparent;border-radius:var(--radius-md);padding:23px;transition:.25s}
        .check-card b{display:flex;align-items:center;gap:10px;font-size:16px}
        .check-card b:before{content:"✓";width:25px;height:25px;border-radius:50%;background:var(--primary);color:var(--deep);display:grid;place-items:center;font-size:13px}
        .check-card p{font-size:13px;color:var(--muted);margin:12px 0 0 35px}
        .topic-strip{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;display:flex;flex-wrap:wrap;gap:12px;align-items:center}
        .topic-label{width:100%;color:var(--muted);font-size:14px;margin-bottom:4px}
        .topic-card{display:inline-flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:999px;padding:11px 17px;background:var(--mist);font-size:14px;font-weight:800;transition:.25s}
        .topic-card span{color:var(--primary-deep)}
        .faq-list{max-width:900px}
        .faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;margin-bottom:12px;overflow:hidden}
        .faq-question{width:100%;border:0;background:#fff;text-align:left;padding:19px 22px;color:var(--ink);font-weight:800;display:flex;justify-content:space-between;align-items:center}
        .faq-question span:last-child{color:var(--primary-deep);font-size:22px}
        .faq-answer{display:none;padding:0 22px 20px;color:var(--muted);font-size:14px}
        .faq-item.open .faq-answer{display:block}
        .faq-item.open .faq-question{color:var(--primary-deep);background:var(--mint)}
        .cta-band{background:var(--deep);color:#fff;border-radius:var(--radius-lg);padding:36px 42px;display:flex;justify-content:space-between;align-items:center;gap:25px}
        .cta-band h2{margin-bottom:7px}
        .cta-band p{color:#b8cbc5;margin-bottom:0}
        .button-row{display:flex;flex-wrap:wrap;gap:12px}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 22px;border:1px solid transparent;border-radius:15px;font-size:15px;font-weight:800;transition:.2s}
        .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
        .btn-primary{background:var(--primary);color:var(--deep)}
        .btn-primary:hover{background:var(--primary-deep);color:#fff}
        .btn-secondary{background:#fff;border-color:var(--line);color:var(--ink)}
        .btn-secondary:hover{border-color:var(--primary);color:var(--primary-deep)}
        .btn-dark{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.2);color:#fff}
        .btn-dark:hover{background:var(--primary);color:var(--deep)}
        .site-footer{background:var(--deep);color:#fff;padding:58px 0 24px}
        .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:35px;padding-bottom:38px;border-bottom:1px solid rgba(255,255,255,.13)}
        .footer-brand{min-width:0;margin-bottom:18px}
        .footer-description,.footer-note{color:#b8cbc5;font-size:14px;line-height:1.8}
        .footer-title{font-size:14px;font-weight:800;margin-bottom:15px;color:var(--primary)}
        .footer-links{display:grid;gap:9px;color:#d6e3df;font-size:14px}
        .footer-links a{transition:.2s}
        .footer-links a:hover{color:var(--primary)}
        .copyright{display:flex;justify-content:space-between;gap:20px;color:#8ca39c;font-size:12px;padding-top:20px}
        @media (max-width:1024px){
            .main-nav{gap:0}.main-nav a{padding:8px 9px;font-size:13px}.brand{min-width:225px}
            .hero-layout,.scene-wrap{gap:35px}.overview-grid{grid-template-columns:repeat(2,1fr)}
            .footer-grid{grid-template-columns:repeat(2,1fr)}
        }
        @media (max-width:768px){
            .container{width:min(var(--container),calc(100% - 32px))}
            .nav-wrap{height:70px;justify-content:space-between}.menu-toggle{display:block}
            .main-nav{display:none;position:absolute;top:70px;left:16px;right:16px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
            .main-nav.show{display:flex}.main-nav a{padding:12px 15px}.main-nav .nav-action{text-align:center;margin-top:8px}
            .hero-layout,.scene-wrap{grid-template-columns:1fr}.page-hero{padding:58px 0}
            h1{font-size:36px}.section{padding:62px 0}.section-head{display:block}
            .section-head .text-link{display:inline-block;margin-top:12px}.verification-list{grid-template-columns:1fr}
            .check-grid{grid-template-columns:repeat(2,1fr)}.cta-band{display:block;padding:30px 25px}.cta-band .button-row{margin-top:22px}
        }
        @media (max-width:520px){
            h1{font-size:31px}.lead{font-size:16px}.overview-grid,.check-grid{grid-template-columns:1fr}
            .verify-item{grid-template-columns:42px 1fr}.verify-state{grid-column:2;justify-self:start}
            .scene-panel,.scene-list{padding:23px}.topic-strip{padding:21px}.footer-grid{grid-template-columns:1fr;gap:26px}
            .copyright{display:block}.copyright span{display:block;margin-top:6px}.brand-text{font-size:15px}
        }

/* roulang page: category3 */
:root{
            --primary:#12c7a5;
            --primary-deep:#0a9d86;
            --ink:#17211f;
            --deep:#10211e;
            --muted:#5d6b67;
            --soft:#8a9692;
            --line:#dde7e3;
            --mist:#f6f8f7;
            --mint:#eaf7f3;
            --white:#fff;
            --orange:#ff8a3d;
            --amber:#fff3df;
            --radius-lg:28px;
            --radius-md:20px;
            --radius-sm:14px;
            --shadow:0 14px 34px rgba(16,33,30,.08);
            --shadow-hover:0 18px 40px rgba(16,33,30,.13);
            --container:1200px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            color:var(--ink);
            background:var(--mist);
            font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
            font-size:16px;
            line-height:1.75;
            -webkit-font-smoothing:antialiased;
        }
        a{color:inherit;text-decoration:none}
        img{max-width:100%;display:block}
        button,input,textarea{font:inherit}
        button{cursor:pointer}
        h1,h2,h3,p{margin-top:0}
        h1,h2,h3{color:var(--ink);letter-spacing:-.035em}
        h1{font-size:clamp(34px,4.2vw,52px);line-height:1.2;margin-bottom:22px;font-weight:800}
        h2{font-size:clamp(26px,3vw,36px);line-height:1.3;margin-bottom:14px;font-weight:800}
        h3{font-size:20px;line-height:1.4;margin-bottom:10px;font-weight:750}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .site-header{
            position:sticky;top:0;z-index:50;
            background:rgba(255,255,255,.94);
            border-bottom:1px solid rgba(221,231,227,.85);
            backdrop-filter:blur(14px);
            transition:box-shadow .25s ease;
        }
        .site-header.scrolled{box-shadow:0 8px 24px rgba(16,33,30,.08)}
        .nav-wrap{height:78px;display:flex;align-items:center;gap:30px}
        .brand{display:flex;align-items:center;gap:11px;min-width:255px}
        .brand-mark{
            width:42px;height:42px;border-radius:14px;background:var(--deep);
            display:grid;place-items:center;color:var(--primary);font-weight:800;
            letter-spacing:-2px;box-shadow:0 8px 20px rgba(16,33,30,.16);
        }
        .brand-text{font-size:17px;font-weight:800;line-height:1.25;letter-spacing:-.3px}
        .brand-text small{display:block;color:var(--soft);font-size:11px;font-weight:600;letter-spacing:1px;margin-top:2px}
        .main-nav{display:flex;align-items:center;gap:5px;flex:1}
        .main-nav a{
            padding:9px 14px;border-radius:999px;color:var(--muted);font-size:14px;
            transition:background .2s,color .2s,transform .2s;
        }
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--primary-deep);background:var(--mint)}
        .main-nav .nav-action{
            white-space:nowrap;padding:12px 20px!important;
            background:var(--primary);color:var(--deep)!important;font-weight:800!important;
        }
        .main-nav .nav-action:hover{background:var(--primary-deep)!important;color:#fff!important;transform:translateY(-1px)}
        .menu-toggle{
            display:none;border:0;background:var(--mint);color:var(--deep);
            width:44px;height:44px;border-radius:12px;font-size:22px;
        }
        .page-hero{
            position:relative;overflow:hidden;background:var(--mint);
            padding:76px 0 70px;border-bottom:1px solid #d7eee7;
        }
        .page-hero::before,.page-hero::after{
            content:"";position:absolute;border:1px solid rgba(18,199,165,.2);border-radius:50%;pointer-events:none;
        }
        .page-hero::before{width:430px;height:430px;right:-120px;top:-250px}
        .page-hero::after{width:250px;height:250px;left:-130px;bottom:-170px}
        .page-hero-grid{
            position:relative;z-index:1;display:grid;
            grid-template-columns:1.2fr .8fr;gap:70px;align-items:center;
        }
        .eyebrow,.section-kicker{
            color:var(--primary-deep);font-size:13px;font-weight:900;
            letter-spacing:1px;margin-bottom:12px;
        }
        .eyebrow{display:inline-flex;align-items:center;gap:8px}
        .eyebrow::before{
            content:"";width:8px;height:8px;border-radius:50%;background:var(--orange);
            box-shadow:0 0 0 5px rgba(255,138,61,.14);
        }
        .page-lead{max-width:680px;color:var(--muted);font-size:18px;line-height:1.85;margin-bottom:0}
        .hero-side{
            display:flex;justify-content:flex-end;
        }
        .news-stamp{
            width:290px;min-height:220px;padding:26px;border-radius:26px;
            background:var(--white);border:1px solid rgba(18,199,165,.25);
            box-shadow:var(--shadow);transform:rotate(2deg);
        }
        .stamp-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}
        .stamp-icon{
            width:48px;height:48px;display:grid;place-items:center;border-radius:16px;
            color:var(--primary-deep);background:var(--mint);font-size:24px;
        }
        .stamp-status{font-size:12px;color:var(--primary-deep);font-weight:800;background:var(--mint);padding:6px 10px;border-radius:999px}
        .stamp-title{font-size:24px;font-weight:800;line-height:1.3;margin-bottom:12px}
        .stamp-date{font-size:13px;color:var(--soft);border-top:1px solid var(--line);padding-top:14px}
        .section{padding:88px 0}
        .section-alt{background:#fff}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:34px}
        .section-intro{color:var(--muted);max-width:650px;margin:0}
        .text-link{color:var(--primary-deep);font-weight:800;font-size:14px;white-space:nowrap}
        .text-link:hover{color:var(--orange)}
        .overview-grid{
            display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
        }
        .overview-card{
            padding:25px 22px;border:1px solid var(--line);background:#fff;
            border-radius:var(--radius-md);transition:transform .2s,box-shadow .2s,border-color .2s;
        }
        .overview-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--primary)}
        .overview-icon{
            width:42px;height:42px;border-radius:13px;background:var(--mint);
            color:var(--primary-deep);display:grid;place-items:center;font-weight:800;margin-bottom:19px;
        }
        .overview-card p{font-size:14px;color:var(--muted);line-height:1.7;margin:0}
        .news-layout{display:grid;grid-template-columns:1.45fr .55fr;gap:28px;align-items:start}
        .news-list{display:grid;gap:13px}
        .news-item{
            display:grid;grid-template-columns:92px 1fr auto;gap:22px;align-items:center;
            padding:21px 22px;background:#fff;border:1px solid var(--line);border-radius:18px;
            transition:transform .2s,box-shadow .2s,border-color .2s;
        }
        .news-item:hover{transform:translateY(-3px);border-color:var(--primary);box-shadow:var(--shadow)}
        .news-date{color:var(--primary-deep);font-size:13px;font-weight:800;line-height:1.35}
        .news-date span{display:block;color:var(--soft);font-size:11px;font-weight:600;margin-top:4px}
        .news-item h3{font-size:18px;margin-bottom:5px}
        .news-item p{color:var(--muted);font-size:14px;margin:0;line-height:1.65}
        .news-arrow{font-size:21px;color:var(--primary-deep);transition:transform .2s}
        .news-item:hover .news-arrow{transform:translateX(4px)}
        .news-aside{
            position:sticky;top:105px;padding:28px;border-radius:24px;background:var(--deep);color:#dcece7;
            overflow:hidden;
        }
        .news-aside::after{
            content:"";position:absolute;width:170px;height:170px;border:1px solid rgba(18,199,165,.25);
            border-radius:50%;right:-70px;bottom:-70px;
        }
        .news-aside h3{color:#fff;font-size:24px;position:relative;z-index:1}
        .news-aside p{font-size:14px;color:#b6cbc5;line-height:1.75;position:relative;z-index:1}
        .aside-points{list-style:none;padding:0;margin:22px 0 0;position:relative;z-index:1}
        .aside-points li{padding:11px 0;border-bottom:1px solid rgba(255,255,255,.12);font-size:14px}
        .aside-points li:last-child{border-bottom:0}
        .aside-points li::before{content:"✓";color:var(--primary);font-weight:900;margin-right:9px}
        .scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
        .scene-card{
            min-height:205px;padding:28px;border-radius:var(--radius-lg);
            border:1px solid var(--line);background:var(--mist);position:relative;overflow:hidden;
        }
        .scene-card:nth-child(2){background:var(--amber)}
        .scene-card:nth-child(3){background:#fff}
        .scene-card:nth-child(4){background:var(--mint)}
        .scene-number{font-size:48px;line-height:1;color:rgba(18,157,134,.22);font-weight:900;position:absolute;right:24px;top:20px}
        .scene-card p{max-width:430px;color:var(--muted);font-size:15px;margin:0;line-height:1.75}
        .timeline{position:relative;max-width:880px;margin:0 auto}
        .timeline::before{content:"";position:absolute;left:88px;top:8px;bottom:8px;width:1px;background:var(--line)}
        .timeline-item{display:grid;grid-template-columns:74px 28px 1fr;gap:0;align-items:start;padding:0 0 30px}
        .timeline-item:last-child{padding-bottom:0}
        .timeline-date{font-size:13px;color:var(--soft);padding-top:4px;line-height:1.4}
        .timeline-dot{width:11px;height:11px;border-radius:50%;background:var(--primary);margin:6px 0 0 8px;box-shadow:0 0 0 6px var(--mint);position:relative;z-index:1}
        .timeline-content{padding:0 0 0 22px}
        .timeline-content h3{font-size:19px;margin-bottom:5px}
        .timeline-content p{color:var(--muted);font-size:14px;margin:0}
        .check-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:55px;align-items:center}
        .check-copy p{color:var(--muted);line-height:1.8}
        .checklist{display:grid;grid-template-columns:1fr 1fr;gap:12px}
        .check-item{
            display:flex;gap:13px;align-items:flex-start;padding:17px 18px;background:#fff;
            border:1px solid var(--line);border-radius:16px;font-size:14px;line-height:1.6;
        }
        .check-item i{
            flex:0 0 22px;width:22px;height:22px;border-radius:50%;background:var(--primary);
            color:var(--deep);font-style:normal;font-size:13px;font-weight:900;text-align:center;line-height:22px;
        }
        .topic-panel{background:var(--deep);padding:36px;border-radius:var(--radius-lg);color:#fff}
        .topic-panel h2{color:#fff}
        .topic-panel p{color:#b9cfca;max-width:700px}
        .topic-links{display:flex;flex-wrap:wrap;gap:11px;margin-top:24px}
        .topic-links a{
            display:inline-flex;align-items:center;min-height:44px;padding:9px 17px;
            border:1px solid rgba(255,255,255,.18);border-radius:999px;color:#e8f6f2;font-size:14px;
            transition:background .2s,border-color .2s,color .2s,transform .2s;
        }
        .topic-links a:hover,.topic-links a:focus{background:var(--primary);border-color:var(--primary);color:var(--deep);transform:translateY(-2px)}
        .faq-list{max-width:900px;margin:0 auto}
        .faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;margin-bottom:12px;overflow:hidden}
        .faq-question{
            width:100%;border:0;background:#fff;padding:20px 24px;text-align:left;
            color:var(--ink);font-weight:750;display:flex;justify-content:space-between;align-items:center;
        }
        .faq-question::after{content:"+";font-size:25px;line-height:1;color:var(--primary-deep);font-weight:400}
        .faq-item[open] .faq-question{background:var(--mint);color:var(--primary-deep)}
        .faq-item[open] .faq-question::after{content:"−"}
        .faq-answer{padding:0 24px 20px;color:var(--muted);font-size:15px;line-height:1.8;background:var(--mint)}
        .closing{
            background:linear-gradient(115deg,var(--mint),#fff);
            border-top:1px solid #d7eee7;border-bottom:1px solid var(--line);
        }
        .closing-box{display:flex;justify-content:space-between;align-items:center;gap:30px}
        .closing-box p{color:var(--muted);margin:0;max-width:690px}
        .button-row{display:flex;flex-wrap:wrap;gap:12px}
        .btn{
            display:inline-flex;align-items:center;justify-content:center;gap:8px;
            min-height:48px;padding:12px 22px;border:1px solid transparent;border-radius:15px;
            font-size:15px;font-weight:800;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s,color .2s;
        }
        .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
        .btn:focus-visible,.main-nav a:focus-visible,.faq-question:focus-visible,.topic-links a:focus-visible{outline:3px solid rgba(18,199,165,.35);outline-offset:3px}
        .btn-primary{background:var(--primary);color:var(--deep)}
        .btn-primary:hover{background:var(--primary-deep);color:#fff}
        .btn-secondary{background:#fff;border-color:var(--line);color:var(--ink)}
        .btn-secondary:hover{border-color:var(--primary);color:var(--primary-deep)}
        .site-footer{background:var(--deep);color:#dcece7;padding:62px 0 24px}
        .footer-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr 1fr;gap:38px;padding-bottom:42px}
        .footer-brand{color:#fff;margin-bottom:18px}
        .footer-description{color:#a9c0ba;font-size:14px;line-height:1.75;max-width:310px}
        .footer-title{font-size:14px;color:#fff;font-weight:800;margin-bottom:15px}
        .footer-links{display:flex;flex-direction:column;gap:9px}
        .footer-links a{color:#a9c0ba;font-size:14px;transition:color .2s,transform .2s}
        .footer-links a:hover{color:var(--primary);transform:translateX(3px)}
        .footer-note{color:#a9c0ba;font-size:13px;line-height:1.8}
        .copyright{
            display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.12);
            padding-top:20px;color:#819a93;font-size:12px;
        }
        @media(max-width:1024px){
            .nav-wrap{gap:16px}.brand{min-width:225px}.main-nav a{padding:8px 9px;font-size:13px}
            .page-hero-grid{gap:35px}.overview-grid{grid-template-columns:repeat(2,1fr)}
            .news-layout{grid-template-columns:1fr}.news-aside{position:static}
            .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
            .footer-grid>div:last-child{grid-column:1/-1}
        }
        @media(max-width:768px){
            .container{width:min(var(--container),calc(100% - 36px))}
            .nav-wrap{height:70px;justify-content:space-between}.brand{min-width:0}.brand-text{font-size:15px}.brand-text small{font-size:9px}
            .menu-toggle{display:block}
            .main-nav{
                display:none;position:absolute;top:70px;left:0;right:0;background:#fff;
                padding:14px 18px 20px;border-bottom:1px solid var(--line);box-shadow:0 14px 25px rgba(16,33,30,.09);
                flex-direction:column;align-items:stretch;gap:4px;
            }
            .main-nav.open{display:flex}.main-nav a{padding:13px 15px;border-radius:12px}
            .main-nav .nav-action{text-align:center;margin-top:8px}
            .page-hero{padding:58px 0 55px}.page-hero-grid{grid-template-columns:1fr;gap:34px}
            .hero-side{justify-content:flex-start}.news-stamp{transform:none;width:100%;max-width:330px}
            .section{padding:64px 0}.section-head{display:block;margin-bottom:25px}.section-head .text-link{display:inline-block;margin-top:15px}
            .news-item{grid-template-columns:70px 1fr auto;gap:13px;padding:18px 15px}
            .news-item h3{font-size:16px}.news-item p{font-size:13px}
            .scene-grid,.check-layout{grid-template-columns:1fr}.check-layout{gap:30px}
            .closing-box{display:block}.closing-box .button-row{margin-top:24px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
        }
        @media(max-width:520px){
            h1{font-size:34px}.page-lead{font-size:16px}
            .overview-grid{grid-template-columns:1fr}.overview-card{padding:21px}
            .news-item{grid-template-columns:1fr auto}.news-date{font-size:12px;grid-column:1/-1}
            .news-item h3{margin-bottom:3px}.news-aside{padding:24px}
            .scene-card{min-height:180px;padding:23px}.timeline::before{left:71px}
            .timeline-item{grid-template-columns:58px 27px 1fr}.timeline-content{padding-left:13px}
            .checklist{grid-template-columns:1fr}.topic-panel{padding:26px 21px}
            .topic-links a{width:100%;justify-content:center}
            .footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin-bottom:5px}
            .button-row .btn{flex:1 1 100%}
        }

/* roulang page: category2 */
:root{
            --primary:#12c7a5;
            --primary-deep:#0a9d86;
            --ink:#17211f;
            --deep:#10211e;
            --muted:#5d6b67;
            --soft:#8a9692;
            --line:#dde7e3;
            --mist:#f6f8f7;
            --mint:#eaf7f3;
            --white:#fff;
            --orange:#ff8a3d;
            --amber:#fff3df;
            --radius-lg:28px;
            --radius-md:20px;
            --radius-sm:14px;
            --shadow:0 14px 34px rgba(16,33,30,.08);
            --shadow-hover:0 18px 40px rgba(16,33,30,.13);
            --container:1200px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;color:var(--ink);background:var(--mist);
            font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
            font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
        }
        a{color:inherit;text-decoration:none}
        img{max-width:100%;display:block}
        button{font:inherit;cursor:pointer}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .site-header{
            position:sticky;top:0;z-index:20;background:rgba(255,255,255,.95);
            border-bottom:1px solid rgba(221,231,227,.9);backdrop-filter:blur(14px)
        }
        .nav-wrap{height:78px;display:flex;align-items:center;gap:30px}
        .brand{display:flex;align-items:center;gap:11px;min-width:255px}
        .brand-mark{
            width:42px;height:42px;border-radius:14px;background:var(--deep);display:grid;
            place-items:center;color:var(--primary);font-weight:800;letter-spacing:-2px;
            box-shadow:0 8px 20px rgba(16,33,30,.16)
        }
        .brand-text{font-size:17px;font-weight:800;line-height:1.25;letter-spacing:-.3px}
        .brand-text small{display:block;color:var(--soft);font-size:11px;font-weight:600;letter-spacing:1px;margin-top:2px}
        .main-nav{display:flex;align-items:center;gap:5px;flex:1}
        .main-nav a{
            padding:9px 14px;border-radius:999px;color:var(--muted);font-size:14px;
            transition:background .2s,color .2s,transform .2s
        }
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--primary-deep);background:var(--mint)}
        .main-nav .nav-action{white-space:nowrap;padding:12px 20px;background:var(--primary);color:var(--deep);font-weight:800}
        .main-nav .nav-action:hover{background:var(--primary-deep);color:#fff;transform:translateY(-1px)}
        .menu-toggle{display:none;border:0;background:var(--mint);color:var(--deep);width:44px;height:44px;border-radius:12px;font-size:22px}
        .page-intro{
            padding:76px 0 70px;background:var(--mint);border-bottom:1px solid #d7eee7;
            position:relative;overflow:hidden
        }
        .page-intro:after{
            content:"";position:absolute;width:430px;height:430px;border:1px solid rgba(18,199,165,.23);
            border-radius:50%;right:-150px;top:-230px
        }
        .intro-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.3fr .7fr;gap:50px;align-items:center}
        .eyebrow,.section-kicker{color:var(--primary-deep);font-size:13px;font-weight:900;letter-spacing:1px}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:15px}
        .eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 5px rgba(255,138,61,.14)}
        h1,h2,h3,p{margin-top:0}
        h1{font-size:clamp(34px,4.2vw,52px);line-height:1.2;letter-spacing:-1.5px;margin-bottom:18px}
        h2{font-size:32px;line-height:1.3;letter-spacing:-.8px;margin-bottom:12px}
        h3{font-size:19px;line-height:1.4;margin-bottom:8px}
        .intro-copy{max-width:700px;color:var(--muted);font-size:18px;margin-bottom:0}
        .status-card{background:#fff;border:1px solid rgba(18,199,165,.24);border-radius:24px;padding:25px;box-shadow:var(--shadow)}
        .status-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:21px}
        .status-badge,.tag{
            display:inline-flex;align-items:center;border-radius:999px;font-size:12px;font-weight:800
        }
        .status-badge{gap:7px;background:var(--mint);color:var(--primary-deep);padding:7px 11px}
        .status-badge:before{content:"";width:7px;height:7px;background:var(--primary);border-radius:50%}
        .tag{padding:5px 10px;background:var(--mint);color:var(--primary-deep)}
        .status-card strong{font-size:26px;display:block;line-height:1.2}
        .status-card small{color:var(--soft)}
        .section{padding:86px 0}
        .section-white{background:#fff}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:32px}
        .section-intro{color:var(--muted);max-width:650px;margin-bottom:0}
        .overview-grid{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:22px;background:#fff;overflow:hidden}
        .overview-item{padding:25px 23px;border-right:1px solid var(--line)}
        .overview-item:last-child{border-right:0}
        .icon-box{width:42px;height:42px;border-radius:13px;background:var(--mint);color:var(--primary-deep);display:grid;place-items:center;font-weight:900;margin-bottom:17px}
        .overview-item p,.download-card p,.scene p,.faq-answer{color:var(--muted);font-size:14px;margin-bottom:0}
        .download-layout{display:grid;grid-template-columns:1.08fr .92fr;gap:32px;align-items:stretch}
        .platform-list{display:grid;gap:14px}
        .download-card{padding:25px;border:1px solid var(--line);border-radius:20px;background:var(--mist);transition:.22s}
        .download-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow)}
        .platform-head{display:flex;align-items:center;gap:14px;margin-bottom:15px}
        .platform-icon{width:47px;height:47px;border-radius:15px;background:var(--deep);color:var(--primary);display:grid;place-items:center;font-size:14px;font-weight:900}
        .version{margin-left:auto;color:var(--soft);font-size:12px}
        .download-meta{display:flex;gap:17px;color:var(--soft);font-size:12px;margin:13px 0 18px}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:11px 20px;border:1px solid transparent;border-radius:14px;font-size:14px;font-weight:800;transition:.2s}
        .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
        .btn-primary{background:var(--primary);color:var(--deep)}
        .btn-primary:hover{background:var(--primary-deep);color:#fff}
        .btn-secondary{background:#fff;border-color:var(--line);color:var(--ink)}
        .btn-secondary:hover{border-color:var(--primary);color:var(--primary-deep)}
        .qr-panel{background:var(--deep);border-radius:25px;padding:31px;color:#fff;display:flex;flex-direction:column;justify-content:center}
        .qr-panel p{color:#b4c4bf;font-size:14px;margin-bottom:24px}
        .qr-row{display:flex;align-items:center;gap:20px}
        .qr{width:116px;height:116px;background:repeating-linear-gradient(45deg,#fff 0 5px,#dceae5 5px 9px);border:9px solid #fff;border-radius:12px}
        .qr-note{color:#d7e5e1;font-size:13px;line-height:1.6}
        .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
        .step{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;position:relative}
        .step-num{width:34px;height:34px;border-radius:50%;background:var(--primary);color:var(--deep);display:grid;place-items:center;font-weight:900;margin-bottom:20px}
        .step:after{content:"→";position:absolute;right:-13px;top:38px;color:var(--primary-deep);font-size:22px}
        .step:last-child:after{display:none}
        .scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
        .scene{padding:28px;border-radius:22px;background:var(--mint);min-height:170px}
        .scene:nth-child(2){background:#fff;border:1px solid var(--line)}
        .scene:nth-child(3){background:#fff;border:1px solid var(--line)}
        .scene:nth-child(4){background:var(--amber)}
        .check-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:40px;align-items:center}
        .check-panel{background:var(--deep);color:#fff;border-radius:25px;padding:32px}
        .check-panel p{color:#b8c9c3;margin-bottom:0}
        .check-list{display:grid;gap:15px}
        .check-item{display:flex;align-items:flex-start;gap:13px;padding-bottom:14px;border-bottom:1px solid var(--line)}
        .check-item:last-child{border-bottom:0}
        .check-mark{flex:0 0 23px;width:23px;height:23px;border-radius:50%;background:var(--primary);color:var(--deep);display:grid;place-items:center;font-size:13px;font-weight:900;margin-top:3px}
        .topic-band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
        .topic-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
        .topic-link{padding:13px 18px;border:1px solid var(--line);border-radius:999px;background:var(--mist);font-size:14px;font-weight:700;transition:.2s}
        .topic-link:hover{border-color:var(--primary);color:var(--primary-deep);background:var(--mint);transform:translateY(-2px)}
        .faq-list{max-width:850px;margin:0 auto;display:grid;gap:11px}
        .faq-item{background:#fff;border:1px solid var(--line);border-radius:17px;overflow:hidden}
        .faq-question{width:100%;padding:19px 22px;border:0;background:#fff;display:flex;align-items:center;justify-content:space-between;text-align:left;color:var(--ink);font-weight:800}
        .faq-question span:last-child{font-size:23px;color:var(--primary-deep);font-weight:400}
        .faq-answer{display:none;padding:0 22px 20px;line-height:1.8}
        .faq-item.open .faq-answer{display:block}
        .faq-item.open .faq-question{background:var(--mint)}
        .cta-strip{padding:58px 0;background:var(--mint)}
        .cta-inner{display:flex;justify-content:space-between;align-items:center;gap:28px}
        .cta-inner p{color:var(--muted);margin:7px 0 0}
        .site-footer{background:var(--deep);color:#fff;padding:58px 0 23px}
        .footer-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr 1fr;gap:38px}
        .footer-brand{min-width:0;color:#fff}
        .footer-description{color:#aebfb9;font-size:14px;max-width:300px;margin:19px 0 0}
        .footer-title{font-weight:800;margin-bottom:15px}
        .footer-links{display:grid;gap:8px}
        .footer-links a{color:#b7c7c2;font-size:14px;transition:.2s}
        .footer-links a:hover{color:var(--primary)}
        .footer-note{color:#aebfb9;font-size:13px;line-height:1.8}
        .copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:42px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;color:#8fa19b;font-size:12px}
        @media(max-width:1024px){
            .nav-wrap{gap:15px}.brand{min-width:220px}.main-nav a{padding:8px 9px;font-size:13px}
            .intro-grid,.download-layout,.check-layout{grid-template-columns:1fr 1fr;gap:24px}
            .overview-grid{grid-template-columns:repeat(2,1fr)}
            .overview-item:nth-child(2){border-right:0}.overview-item:nth-child(-n+2){border-bottom:1px solid var(--line)}
            .steps{grid-template-columns:repeat(2,1fr)}.step:after{display:none}
            .footer-grid{grid-template-columns:1fr 1fr}
        }
        @media(max-width:768px){
            .container{width:min(100% - 34px,var(--container))}
            .nav-wrap{height:70px;justify-content:space-between}.menu-toggle{display:block}
            .main-nav{display:none;position:absolute;left:17px;right:17px;top:78px;padding:13px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
            .main-nav.show{display:flex}.main-nav a{text-align:center;padding:12px}
            .intro-grid,.download-layout,.check-layout,.scene-grid{grid-template-columns:1fr}
            .page-intro{padding:58px 0}.section{padding:62px 0}
            h1{font-size:36px}.intro-copy{font-size:16px}
            .status-card{max-width:430px}.cta-inner{display:block}.cta-inner .button-row{margin-top:22px}
        }
        @media(max-width:520px){
            .overview-grid,.steps{grid-template-columns:1fr}.overview-item{border-right:0;border-bottom:1px solid var(--line)}
            .overview-item:last-child{border-bottom:0}.qr-row{align-items:flex-start;flex-direction:column}
            .download-meta{flex-wrap:wrap;gap:6px 14px}.footer-grid{grid-template-columns:1fr;gap:28px}
            .copyright{display:block}.copyright span{display:block;margin-top:5px}
            h1{font-size:32px}h2{font-size:27px}.section-head{display:block}.section-head .section-intro{margin-top:10px}
        }

/* roulang page: category4 */
:root{
            --primary:#12c7a5;
            --primary-deep:#0a9d86;
            --ink:#17211f;
            --deep:#10211e;
            --muted:#5d6b67;
            --soft:#8a9692;
            --line:#dde7e3;
            --mist:#f6f8f7;
            --mint:#eaf7f3;
            --white:#fff;
            --orange:#ff8a3d;
            --amber:#fff3df;
            --radius-lg:28px;
            --radius-md:20px;
            --radius-sm:14px;
            --shadow:0 14px 34px rgba(16,33,30,.08);
            --shadow-hover:0 18px 40px rgba(16,33,30,.13);
            --container:1200px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;color:var(--ink);background:var(--mist);
            font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
            font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
        }
        a{color:inherit;text-decoration:none}
        img{display:block;max-width:100%}
        button,input,textarea{font:inherit}
        button{cursor:pointer}
        h1,h2,h3,p{margin-top:0}
        h1,h2,h3{letter-spacing:-.6px}
        h1{font-size:clamp(34px,4.2vw,52px);line-height:1.2;margin-bottom:22px}
        h2{font-size:clamp(26px,3vw,36px);line-height:1.3;margin-bottom:12px}
        h3{font-size:20px;line-height:1.4;margin-bottom:9px}
        .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
        .site-header{
            position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);
            border-bottom:1px solid rgba(221,231,227,.85);backdrop-filter:blur(14px);
        }
        .nav-wrap{height:78px;display:flex;align-items:center;gap:30px}
        .brand{display:flex;align-items:center;gap:11px;min-width:255px}
        .brand-mark{
            width:42px;height:42px;border-radius:14px;background:var(--deep);
            display:grid;place-items:center;color:var(--primary);font-weight:800;
            letter-spacing:-2px;box-shadow:0 8px 20px rgba(16,33,30,.16)
        }
        .brand-text{font-size:17px;font-weight:800;line-height:1.25;letter-spacing:-.3px}
        .brand-text small{display:block;color:var(--soft);font-size:11px;font-weight:600;letter-spacing:1px;margin-top:2px}
        .main-nav{display:flex;align-items:center;gap:5px;flex:1}
        .main-nav a{
            padding:9px 14px;border-radius:999px;color:var(--muted);font-size:14px;
            transition:background .2s,color .2s,transform .2s
        }
        .main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--primary-deep);background:var(--mint)}
        .main-nav .nav-action{
            white-space:nowrap;padding:12px 20px!important;background:var(--primary);
            color:var(--deep)!important;font-weight:800!important
        }
        .main-nav .nav-action:hover{background:var(--primary-deep)!important;color:#fff!important;transform:translateY(-1px)}
        .menu-toggle{
            display:none;border:0;background:var(--mint);color:var(--deep);
            width:44px;height:44px;border-radius:12px;font-size:22px
        }
        .page-intro{
            padding:86px 0 76px;background:var(--mint);
            border-bottom:1px solid #d7eee7;position:relative;overflow:hidden
        }
        .page-intro:after{
            content:"";position:absolute;width:390px;height:390px;border:1px solid rgba(18,199,165,.22);
            border-radius:50%;right:-120px;top:-180px
        }
        .intro-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:70px;align-items:center;position:relative;z-index:1}
        .eyebrow,.section-kicker{
            color:var(--primary-deep);font-size:13px;font-weight:900;letter-spacing:1px
        }
        .eyebrow{display:inline-flex;gap:8px;align-items:center;margin-bottom:18px}
        .eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 5px rgba(255,138,61,.14)}
        .intro-copy{max-width:720px;color:var(--muted);font-size:18px;line-height:1.85;margin-bottom:0}
        .status-panel{
            background:#fff;border:1px solid rgba(221,231,227,.9);border-radius:24px;padding:27px;
            box-shadow:var(--shadow)
        }
        .status-label{font-size:13px;color:var(--soft);margin-bottom:14px}
        .status-title{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;margin-bottom:17px}
        .status-dot{width:12px;height:12px;background:var(--primary);border-radius:50%;box-shadow:0 0 0 6px rgba(18,199,165,.13)}
        .status-meta{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:15px;color:var(--muted);font-size:13px}
        .section{padding:88px 0}
        .section-white{background:#fff}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:32px}
        .section-intro{color:var(--muted);max-width:650px;margin:0}
        .overview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
        .info-card,.path-card,.scene-card,.checklist,.topic-card,.faq-item{
            background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);
            transition:transform .2s,box-shadow .2s,border-color .2s
        }
        .info-card{padding:24px;min-height:185px}
        .info-card:hover,.path-card:hover,.scene-card:hover,.topic-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-hover)}
        .icon-box{
            width:43px;height:43px;display:grid;place-items:center;border-radius:14px;
            background:var(--mint);color:var(--primary-deep);font-weight:900;margin-bottom:22px
        }
        .info-card p,.path-card p,.scene-card p,.topic-card p{color:var(--muted);font-size:14px;line-height:1.7;margin-bottom:0}
        .path-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:18px}
        .path-card{padding:25px;background:var(--mist);display:flex;gap:18px;align-items:flex-start}
        .step-number{
            flex:0 0 38px;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
            background:var(--deep);color:var(--primary);font-weight:800
        }
        .path-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
        .scene-layout{display:grid;grid-template-columns:1fr 1fr;gap:18px}
        .scene-card{padding:28px;min-height:210px}
        .scene-card.highlight{background:var(--deep);color:#fff;border-color:var(--deep)}
        .scene-card.highlight p{color:#b9cbc5}
        .scene-tag,.topic-tag{
            display:inline-flex;padding:5px 10px;border-radius:999px;background:var(--mint);
            color:var(--primary-deep);font-size:12px;font-weight:800;margin-bottom:17px
        }
        .scene-card.highlight .scene-tag{background:rgba(18,199,165,.16);color:var(--primary)}
        .check-layout{display:grid;grid-template-columns:1fr .85fr;gap:20px;align-items:stretch}
        .checklist{padding:28px}
        .check-item{display:flex;gap:13px;padding:14px 0;border-bottom:1px solid var(--line);color:var(--muted)}
        .check-item:last-child{border-bottom:0;padding-bottom:0}
        .checkmark{color:var(--primary-deep);font-weight:900;font-size:19px;line-height:1.4}
        .notice-box{border-radius:var(--radius-md);padding:30px;background:var(--amber);border:1px solid #f5dfb9}
        .notice-box h3{color:#684b20}
        .notice-box p{color:#765f38;margin-bottom:0;font-size:15px}
        .topic-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
        .topic-card{padding:20px;background:var(--mist)}
        .topic-card h3{font-size:17px}
        .topic-card p{font-size:13px;margin-bottom:14px}
        .topic-card a{color:var(--primary-deep);font-size:13px;font-weight:800}
        .topic-card a:hover{color:var(--orange)}
        .faq-wrap{max-width:900px}
        .faq-item{margin-bottom:12px;overflow:hidden}
        .faq-question{
            width:100%;border:0;background:#fff;text-align:left;padding:21px 24px;
            display:flex;justify-content:space-between;align-items:center;color:var(--ink);font-weight:800
        }
        .faq-question span:last-child{color:var(--primary-deep);font-size:22px;font-weight:400}
        .faq-answer{display:none;padding:0 24px 22px;color:var(--muted);font-size:15px}
        .faq-item.open .faq-answer{display:block}
        .faq-item.open .faq-question{color:var(--primary-deep)}
        .cta-section{padding:70px 0;background:var(--deep);color:#fff}
        .cta-box{display:flex;justify-content:space-between;align-items:center;gap:30px}
        .cta-box p{color:#b9cbc5;margin:8px 0 0}
        .button-row{display:flex;flex-wrap:wrap;gap:12px}
        .btn{
            display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 22px;
            border:1px solid transparent;border-radius:15px;font-size:15px;font-weight:800;
            transition:transform .2s,box-shadow .2s,background .2s,border-color .2s,color .2s
        }
        .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
        .btn:focus-visible,.main-nav a:focus-visible,.faq-question:focus-visible{outline:3px solid rgba(18,199,165,.35);outline-offset:3px}
        .btn-primary{background:var(--primary);color:var(--deep)}
        .btn-primary:hover{background:var(--primary-deep);color:#fff}
        .btn-secondary{background:#fff;border-color:var(--line);color:var(--ink)}
        .btn-secondary:hover{border-color:var(--primary);color:var(--primary-deep)}
        .cta-section .btn-secondary{background:transparent;border-color:rgba(255,255,255,.3);color:#fff}
        .cta-section .btn-secondary:hover{border-color:var(--primary);color:var(--primary)}
        .site-footer{background:#0c1917;color:#fff;padding:58px 0 24px}
        .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:35px;padding-bottom:40px}
        .footer-brand{min-width:0;color:#fff;margin-bottom:17px}
        .footer-description,.footer-note{color:#9eb2ac;font-size:13px;line-height:1.8}
        .footer-title{font-weight:800;margin-bottom:15px;color:#fff}
        .footer-links{display:grid;gap:8px;color:#9eb2ac;font-size:13px}
        .footer-links a{transition:color .2s}
        .footer-links a:hover{color:var(--primary)}
        .copyright{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;display:flex;justify-content:space-between;gap:20px;color:#78908a;font-size:12px}
        @media(max-width:1024px){
            .nav-wrap{gap:16px}.brand{min-width:230px}.main-nav a{padding:8px 9px;font-size:13px}
            .overview-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}
        }
        @media(max-width:768px){
            .container{width:min(var(--container),calc(100% - 34px))}
            .nav-wrap{height:70px;justify-content:space-between}.menu-toggle{display:block}
            .main-nav{display:none;position:absolute;left:17px;right:17px;top:78px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
            .main-nav.open{display:flex}.main-nav a{padding:12px 14px}.main-nav .nav-action{text-align:center;margin-top:7px}
            .brand{min-width:0}.brand-text{font-size:15px}.brand-text small{font-size:9px}
            .page-intro{padding:63px 0 55px}.intro-grid,.path-layout,.check-layout{grid-template-columns:1fr;gap:25px}
            .section{padding:64px 0}.section-head{display:block;margin-bottom:25px}.section-head .section-intro{margin-top:10px}
            .path-list,.scene-layout{grid-template-columns:1fr}.topic-strip{grid-template-columns:repeat(2,1fr)}
            .cta-box{display:block}.cta-box .button-row{margin-top:24px}.copyright{display:block}.copyright span{display:block;margin-top:5px}
        }
        @media(max-width:520px){
            h1{font-size:34px}.intro-copy{font-size:16px}.overview-grid,.topic-strip,.footer-grid{grid-template-columns:1fr}
            .info-card{min-height:auto}.status-panel{padding:22px}.section{padding:52px 0}
            .scene-card,.checklist{padding:22px}.btn{width:100%}.button-row{display:grid}
        }