/* roulang page: index */
:root{
  --ink:#123c35;--ink-deep:#0b2d27;--orange:#ed8b4a;--jade:#45a88d;
  --cream:#faf8f3;--mist:#f1f4ee;--white:#fff;--text:#1d2925;
  --muted:#60706a;--soft:#8b9792;--line:#dce5dd;--radius:18px;
  --shadow:0 14px 36px rgba(18,60,53,.09);--shadow-lg:0 24px 55px rgba(18,60,53,.16);
  --max:1200px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--cream);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.7}
a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input,select,textarea{font:inherit}button{cursor:pointer}
:focus-visible{outline:3px solid rgba(237,139,74,.48);outline-offset:3px}.container{width:min(var(--max),calc(100% - 64px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(250,248,243,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);letter-spacing:-.5px;white-space:nowrap}.brand-mark{width:38px;height:38px;border-radius:12px;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:900;box-shadow:inset 0 -4px 0 rgba(0,0,0,.13)}.brand small{display:block;font-size:10px;letter-spacing:1.4px;color:var(--jade);line-height:1}.brand strong{display:block;font-size:15px;line-height:1.15}
.nav-list{display:flex;align-items:center;gap:4px;list-style:none;padding:0;margin:0}.nav-list a{font-size:14px;font-weight:700;color:var(--muted);padding:10px 11px;border-radius:9px;transition:.2s}.nav-list a:hover,.nav-list a.active{color:var(--ink);background:#e7eee8}.nav-list a.active{box-shadow:inset 0 -2px 0 var(--orange)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:11px;padding:12px 19px;font-weight:800;font-size:14px;transition:transform .2s,background .2s,box-shadow .2s}.btn:hover{transform:translateY(-2px);box-shadow:0 9px 20px rgba(18,60,53,.16)}.btn-primary{background:var(--ink);color:#fff}.btn-primary:hover{background:var(--ink-deep)}.btn-orange{background:var(--orange);color:#382014}.btn-orange:hover{background:#f09d61}.btn-outline{border-color:#b8c9bd;color:var(--ink);background:transparent}.btn-outline:hover{background:#fff}.menu-toggle{display:none;border:0;background:var(--mist);color:var(--ink);width:42px;height:42px;border-radius:10px;font-size:20px}
main{overflow:hidden}.section{padding:86px 0}.section-soft{background:var(--mist)}.section-dark{background:var(--ink);color:#fff}.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--jade);font-weight:800;font-size:13px;letter-spacing:.4px}.eyebrow:before{content:"";width:20px;height:2px;background:var(--orange)}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(38px,4vw,52px);line-height:1.2;letter-spacing:-1.8px}h2{font-size:clamp(28px,3vw,36px);line-height:1.28;letter-spacing:-1px;color:var(--ink)}h3{font-size:19px;line-height:1.42}.section-dark h2{color:#fff}.lead{color:var(--muted);max-width:650px;font-size:17px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:22px;margin-bottom:34px}.section-head p{margin-bottom:0}
.hero{padding:66px 0 52px;background:radial-gradient(circle at 78% 28%,#e0eddf 0,rgba(224,237,223,0) 29%),var(--cream)}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:54px;min-height:520px}.hero-copy h1 span{color:var(--jade)}.hero-copy .lead{font-size:18px;margin:20px 0 29px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px}.hero-notes{display:flex;gap:20px;margin-top:29px;font-size:13px;color:var(--muted);font-weight:700}.hero-notes span:before{content:"✓";color:var(--jade);margin-right:6px}
.app-stage{position:relative;height:465px;display:flex;align-items:center;justify-content:center}.orbit{position:absolute;width:395px;height:395px;border:1px solid #c5d8c9;border-radius:50%}.device{position:relative;width:238px;height:438px;border:9px solid #203d36;border-radius:38px;background:#fbfaf5;box-shadow:var(--shadow-lg);padding:18px 12px;z-index:2}.speaker{width:75px;height:6px;border-radius:9px;background:#35564d;margin:-8px auto 13px}.screen-title{font-size:11px;color:var(--soft);display:flex;justify-content:space-between}.screen-title strong{color:var(--ink);font-size:17px}.mini-banner{margin:14px 0;padding:13px;border-radius:13px;background:#dbeadf;color:var(--ink);font-size:12px;font-weight:800}.mini-banner b{display:block;font-size:17px}.screen-row{display:flex;gap:8px;margin:9px 0}.screen-box{flex:1;background:#f0f3ee;border-radius:10px;height:67px;padding:9px;font-size:10px;color:var(--muted)}.screen-box i{display:block;width:22px;height:22px;border-radius:7px;background:var(--orange);margin-bottom:5px}.screen-list{border-top:1px solid #e3e8e2;margin-top:12px;padding-top:8px}.screen-list div{height:29px;border-radius:7px;background:linear-gradient(90deg,#e4e9e3 65%,transparent 65%);margin:7px 0}.screen-nav{position:absolute;bottom:15px;left:14px;right:14px;display:flex;justify-content:space-around;color:var(--jade);font-size:10px}.float-chip{position:absolute;z-index:3;background:#fff;padding:10px 13px;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:12px;color:var(--ink);font-weight:800;font-size:12px}.chip-one{left:3%;top:21%}.chip-two{right:0;bottom:17%;color:#fff;background:var(--ink);border-color:var(--ink)}.chip-two b{color:#f4bd8e}
.entry-grid{display:grid;grid-template-columns:1.25fr .85fr .85fr 1.05fr;gap:16px}.entry-card{min-height:202px;padding:24px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;position:relative;overflow:hidden;transition:.25s}.entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.entry-card:nth-child(1){background:var(--ink);color:#fff}.entry-card:nth-child(4){background:#f6dcc7}.entry-icon{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:#dceee6;color:var(--ink);font-size:20px;margin-bottom:25px}.entry-card:first-child .entry-icon{background:rgba(255,255,255,.13);color:#f5bd90}.entry-card h3{margin-bottom:7px}.entry-card p{font-size:13px;line-height:1.6;margin:0;color:var(--muted)}.entry-card:first-child p{color:#cad8d0}.entry-arrow{position:absolute;right:20px;bottom:17px;color:var(--orange);font-size:22px;font-weight:900}
.news-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:22px}.feature-news,.news-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s}.feature-news:hover,.news-item:hover{box-shadow:var(--shadow);transform:translateY(-3px)}.visual{height:195px;background:linear-gradient(135deg,#275c50,#85b8a3);position:relative;overflow:hidden}.visual:after{content:"NG28";position:absolute;right:15px;bottom:-26px;color:rgba(255,255,255,.18);font-size:80px;font-weight:900;letter-spacing:-6px}.visual.orange{background:linear-gradient(135deg,#d47339,#f4c288)}.visual.soft{background:linear-gradient(135deg,#8dc2ae,#e4f0e6)}.feature-body{padding:23px}.tag{display:inline-flex;background:#e4f1ea;color:#28745e;padding:3px 9px;border-radius:20px;font-size:12px;font-weight:800}.tag.orange{background:#fbe4d2;color:#a95320}.feature-body h3{font-size:23px;margin:11px 0 8px}.feature-body p{font-size:14px;color:var(--muted);margin-bottom:15px}.meta{display:flex;justify-content:space-between;align-items:center;gap:10px;color:var(--soft);font-size:12px}.text-link{color:var(--ink);font-weight:800}.text-link:hover{color:var(--orange)}.news-stack{display:grid;gap:11px}.news-item{padding:16px 18px;display:grid;grid-template-columns:1fr auto;gap:9px}.news-item h3{font-size:16px;margin:0 0 5px}.news-item p{font-size:13px;color:var(--muted);line-height:1.5;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.news-date{font-size:12px;color:var(--soft);white-space:nowrap}.empty-state{grid-column:1/-1;padding:50px 20px;text-align:center;border:1px dashed #b8c9bd;border-radius:var(--radius);background:#fff}.empty-icon{font-size:32px;margin-bottom:8px}.empty-state h3{margin:0 0 5px}.empty-state p{color:var(--muted);margin:0 0 18px}
.curated-grid{display:grid;grid-template-columns:1.3fr .9fr .9fr;gap:17px;align-items:stretch}.curated-card{padding:25px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);min-height:220px;position:relative;overflow:hidden;transition:.25s}.curated-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.curated-card.main{background:#e2eee3}.curated-card h3{font-size:22px;max-width:280px}.curated-card p{font-size:14px;color:var(--muted);max-width:310px}.index-no{position:absolute;right:18px;bottom:-15px;color:rgba(18,60,53,.1);font-weight:900;font-size:83px;line-height:1}.topic-line{font-size:12px;font-weight:800;color:var(--jade)}
.download-wrap{display:grid;grid-template-columns:1fr 1fr;gap:58px;align-items:center}.download-copy h2{color:#fff}.download-copy .lead{color:#c4d4cb}.download-options{display:flex;gap:9px;flex-wrap:wrap;margin:24px 0}.platform{border:1px solid rgba(255,255,255,.25);border-radius:9px;padding:8px 11px;font-size:13px;color:#e2ece5}.qr-row{display:flex;align-items:center;gap:18px}.qr{width:92px;height:92px;background:#fff;border-radius:10px;padding:8px;display:grid;grid-template-columns:repeat(5,1fr);gap:3px}.qr i{background:var(--ink);border-radius:1px}.qr i:nth-child(2n){background:transparent}.download-card{background:#f6f4ec;border-radius:25px;min-height:330px;padding:25px;position:relative;overflow:hidden;color:var(--ink)}.version-pill{display:inline-flex;padding:5px 9px;background:#deeee4;border-radius:20px;font-size:12px;font-weight:800}.download-card h3{font-size:25px;margin:16px 0 7px}.version-list{margin-top:20px;display:grid;gap:10px}.version-list div{padding:10px 12px;background:#fff;border-radius:10px;font-size:13px;display:flex;justify-content:space-between}.version-list b{color:var(--jade)}.download-art{position:absolute;right:-5px;bottom:-38px;width:190px;height:275px;border:7px solid #224b42;border-radius:27px;background:#fff;padding:14px;transform:rotate(-8deg);box-shadow:0 14px 28px rgba(0,0,0,.18)}
.mobile-showcase{display:grid;grid-template-columns:.9fr 1.1fr;gap:54px;align-items:center}.screens{height:330px;position:relative}.small-screen{position:absolute;width:148px;height:279px;border:6px solid #23453e;border-radius:24px;background:#fff;padding:13px;box-shadow:var(--shadow)}.small-screen:nth-child(1){left:4%;top:24px;transform:rotate(-10deg)}.small-screen:nth-child(2){left:28%;top:0;z-index:2}.small-screen:nth-child(3){right:3%;top:29px;transform:rotate(10deg)}.tiny-head{height:32px;border-radius:8px;background:#e0eee4;margin-bottom:9px}.tiny-block{height:65px;background:#f1f3ef;border-radius:8px;margin:7px 0}.tiny-block.orange{background:#f7d6bd}.steps{display:grid;gap:15px}.step{display:grid;grid-template-columns:47px 1fr;gap:15px;align-items:start;padding:14px 0;border-bottom:1px solid var(--line)}.step-num{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:#dceee6;color:var(--ink);font-weight:900}.step h3{margin:0 0 2px}.step p{margin:0;color:var(--muted);font-size:14px}
.ranking-grid{display:grid;grid-template-columns:.84fr 1.16fr;gap:22px}.rank-hero{background:var(--ink);border-radius:var(--radius);padding:30px;color:#fff;min-height:304px;position:relative;overflow:hidden}.rank-hero:after{content:"01";position:absolute;right:18px;bottom:-32px;font-size:145px;font-weight:900;color:rgba(255,255,255,.08)}.rank-hero h2{color:#fff;max-width:310px}.rank-hero p{color:#c8d7cf;max-width:320px}.rank-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:8px 21px}.rank-row{display:grid;grid-template-columns:42px 55px 1fr auto;gap:13px;align-items:center;padding:13px 0;border-bottom:1px solid var(--line)}.rank-row:last-child{border:0}.rank-no{font-size:20px;font-weight:900;color:var(--orange)}.thumb{height:39px;border-radius:8px;background:linear-gradient(135deg,#8ebba8,#e6ead9)}.rank-row h3{font-size:15px;margin:0}.rank-row time{color:var(--soft);font-size:12px}
.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.event{background:#fff;border:1px solid var(--line);padding:22px;border-radius:var(--radius);border-top:4px solid var(--jade);transition:.2s}.event:hover{box-shadow:var(--shadow);transform:translateY(-3px)}.event-date{font-size:13px;color:var(--orange);font-weight:900}.event h3{margin:12px 0 8px}.event p{font-size:14px;color:var(--muted);margin-bottom:13px}
.guide-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.guide-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;position:relative}.guide-count{font-size:13px;font-weight:900;color:var(--orange)}.guide-card h3{margin:16px 0 7px}.guide-card p{font-size:13px;color:var(--muted);margin:0}.safety-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px}.safety-list{display:grid;grid-template-columns:1fr 1fr;gap:13px}.safety-item{background:#fff;border:1px solid var(--line);padding:17px;border-radius:14px;display:flex;gap:12px}.safe-icon{flex:0 0 33px;height:33px;border-radius:10px;background:#dceee6;color:var(--ink);display:grid;place-items:center;font-weight:900}.safety-item h3{font-size:15px;margin:0 0 3px}.safety-item p{margin:0;font-size:12px;color:var(--muted);line-height:1.55}.safety-note{background:#dceee6;padding:30px;border-radius:var(--radius)}.safety-note h2{font-size:28px}.safety-note p{color:#416259}
.support-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:45px}.form-card{background:#fff;border:1px solid var(--line);padding:28px;border-radius:var(--radius);box-shadow:var(--shadow)}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px}.field{display:grid;gap:6px;margin-bottom:13px}.field label{font-size:13px;font-weight:800;color:var(--ink)}.field input,.field select,.field textarea{width:100%;border:1px solid #cad7cc;border-radius:10px;padding:11px 12px;background:#fcfdfb;color:var(--text);outline:0;transition:.2s}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--jade);box-shadow:0 0 0 3px rgba(69,168,141,.13)}.field textarea{min-height:105px;resize:vertical}.privacy{font-size:12px;color:var(--soft);margin:12px 0 0}.support-panel{padding:16px 0}.support-panel h2{margin-bottom:10px}.support-line{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}.support-line b{display:grid;place-items:center;flex:0 0 36px;height:36px;border-radius:10px;background:#f7dfcf;color:#a95320}.support-line h3{font-size:16px;margin:0}.support-line p{font-size:13px;color:var(--muted);margin:2px 0 0}
.faq-wrap{max-width:890px;margin:0 auto}.faq-item{border-bottom:1px solid rgba(255,255,255,.18)}.faq-q{width:100%;display:flex;justify-content:space-between;gap:22px;align-items:center;background:none;border:0;color:#fff;text-align:left;padding:19px 0;font-weight:800;font-size:16px}.faq-q span:last-child{color:#f5bc8e;font-size:22px}.faq-a{color:#c5d5cc;max-height:0;overflow:hidden;transition:max-height .28s ease,padding .28s ease;padding-right:42px}.faq-item.open .faq-a{max-height:140px;padding:0 42px 18px 0}.faq-item.open .faq-q span:last-child{transform:rotate(45deg)}
.site-footer{background:#0b2d27;color:#c5d5cc;padding:55px 0 22px}.footer-grid{display:grid;grid-template-columns:1.25fr .8fr .8fr;gap:45px}.footer-brand p{font-size:14px;max-width:340px;color:#a9beb3;margin-top:15px}.footer-title{color:#fff;font-size:14px;margin:4px 0 14px}.footer-links{display:grid;gap:8px}.footer-links a{font-size:13px;color:#b7cabf}.footer-links a:hover{color:#f5bc8e}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:38px;padding-top:18px;display:flex;justify-content:space-between;gap:16px;font-size:12px;color:#91aa9e}.floating-download{display:none}
@media(max-width:1024px){.nav-list{gap:0}.nav-list a{padding:9px 7px;font-size:13px}.hero-grid,.download-wrap,.mobile-showcase,.support-grid{gap:30px}.entry-grid{grid-template-columns:1fr 1fr}.guide-grid{grid-template-columns:1fr 1fr}.hero{padding-top:45px}}
@media(max-width:767px){.container{width:min(100% - 32px,var(--max))}.nav-wrap{height:68px}.brand strong{font-size:13px}.nav-list,.nav-download{display:none}.menu-toggle{display:grid;place-items:center}.nav-list.show{position:absolute;display:grid;grid-template-columns:1fr 1fr;gap:4px;left:16px;right:16px;top:67px;padding:13px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:14px}.nav-list.show a{display:block;padding:11px}.section{padding:61px 0}.hero{padding:34px 0 20px}.hero-grid,.news-layout,.curated-grid,.download-wrap,.mobile-showcase,.ranking-grid,.safety-grid,.support-grid{grid-template-columns:1fr}.hero-grid{gap:18px}.hero-copy h1{font-size:35px}.hero-copy .lead{font-size:16px}.app-stage{height:365px;transform:scale(.85);margin:-20px 0}.section-head{display:block;margin-bottom:24px}.section-head .lead{margin-top:9px}.entry-grid,.timeline{grid-template-columns:1fr 1fr}.feature-body h3{font-size:20px}.curated-card{min-height:180px}.screens{height:280px}.small-screen{transform:scale(.78)!important}.small-screen:nth-child(1){left:-8%;top:8px}.small-screen:nth-child(2){left:25%;top:-6px}.small-screen:nth-child(3){right:-7%;top:12px}.safety-list{grid-template-columns:1fr}.field-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:26px}.footer-brand{grid-column:1/-1}.floating-download{display:flex;position:fixed;right:16px;bottom:16px;z-index:45;border-radius:50px;padding:11px 16px;box-shadow:var(--shadow-lg)}}
@media(max-width:520px){h2{font-size:28px}.entry-grid,.timeline,.guide-grid{grid-template-columns:1fr}.hero-actions .btn{width:100%}.hero-notes{gap:10px;flex-wrap:wrap}.app-stage{height:330px;transform:scale(.76);margin:-33px 0}.news-item{grid-template-columns:1fr}.news-date{display:none}.rank-row{grid-template-columns:32px 47px 1fr}.rank-row time{display:none}.qr-row{align-items:flex-start}.download-card{min-height:300px}.footer-grid{grid-template-columns:1fr}.footer-bottom{display:block}.footer-bottom span{display:block;margin:5px 0}}

/* roulang page: category1 */
:root{
      --ink:#123c35;--ink-deep:#0b2d27;--orange:#ed8b4a;--jade:#45a88d;
      --cream:#faf8f3;--mist:#f1f4ee;--white:#fff;--text:#1d2925;
      --muted:#60706a;--soft:#8b9792;--line:#dce5dd;--radius:18px;
      --shadow:0 14px 36px rgba(18,60,53,.09);--shadow-lg:0 24px 55px rgba(18,60,53,.16);
      --max:1200px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 64px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(250,248,243,.97);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
    .nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);letter-spacing:-.5px;white-space:nowrap}
    .brand-mark{width:38px;height:38px;border-radius:12px;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:900;box-shadow:inset 0 -4px 0 rgba(0,0,0,.13)}
    .brand small{display:block;font-size:10px;letter-spacing:1.4px;color:var(--jade);line-height:1}
    .brand strong{display:block;font-size:15px;line-height:1.15}
    .nav-list{display:flex;align-items:center;gap:4px;list-style:none;padding:0;margin:0}
    .nav-list a{font-size:14px;font-weight:700;color:var(--muted);padding:10px 11px;border-radius:9px;transition:.2s}
    .nav-list a:hover,.nav-list a.active{color:var(--ink);background:#e7eee8}
    .nav-list a.active{box-shadow:inset 0 -2px 0 var(--orange)}
    .header-action{white-space:nowrap}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:11px;padding:12px 19px;font-weight:800;font-size:14px;transition:transform .2s,background .2s,box-shadow .2s}
    .btn:hover{transform:translateY(-2px);box-shadow:0 9px 20px rgba(18,60,53,.16)}
    .btn-primary{background:var(--ink);color:#fff}
    .btn-primary:hover{background:var(--ink-deep)}
    .btn-orange{background:var(--orange);color:#382014}
    .btn-orange:hover{background:#f09d61}
    .btn-outline{border-color:#b8c9bd;color:var(--ink);background:transparent}
    .btn-outline:hover{background:#fff}
    .menu-toggle{display:none;border:0;background:var(--mist);color:var(--ink);width:42px;height:42px;border-radius:10px;font-size:20px}
    main{overflow:hidden}
    .section{padding:78px 0}
    .section-soft{background:var(--mist)}
    .section-dark{background:var(--ink);color:#fff}
    .eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--jade);font-weight:800;font-size:13px;letter-spacing:.4px}
    .eyebrow:before{content:"";width:20px;height:2px;background:var(--orange)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:22px;margin-bottom:32px}
    h1,h2,h3{color:var(--ink);line-height:1.25;letter-spacing:-.5px}
    h1{font-size:clamp(34px,5vw,52px);margin:15px 0 14px}
    h2{font-size:clamp(28px,3vw,36px);margin:10px 0}
    h3{font-size:20px;margin:0 0 8px}
    p{margin-top:0}
    .lead{color:var(--muted);max-width:720px;font-size:17px}
    .page-intro{padding:68px 0 55px;background:radial-gradient(circle at 84% 18%,#dfede1 0,rgba(223,237,225,0) 30%),var(--cream);border-bottom:1px solid var(--line)}
    .breadcrumbs{display:flex;gap:9px;align-items:center;color:var(--soft);font-size:13px;margin-bottom:22px}
    .breadcrumbs a:hover{color:var(--ink)}
    .intro-row{display:flex;justify-content:space-between;align-items:end;gap:35px}
    .intro-badge{width:112px;height:112px;border-radius:30px;background:var(--ink);color:#fff;display:grid;place-items:center;font-weight:900;font-size:28px;box-shadow:var(--shadow-lg);transform:rotate(4deg)}
    .intro-badge span{color:#f2b486}
    .feature-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:22px}
    .feature-card,.content-card,.rank-card,.note-card,.app-strip{border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden;transition:.25s}
    .feature-card:hover,.content-card:hover,.rank-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .visual{min-height:190px;background:linear-gradient(135deg,#d8e9df,#f6dcc8);position:relative;overflow:hidden}
    .visual:before,.visual:after{content:"";position:absolute;border:1px solid rgba(18,60,53,.18);border-radius:50%}
    .visual:before{width:250px;height:250px;right:-50px;top:-85px}
    .visual:after{width:150px;height:150px;left:12%;bottom:-80px}
    .visual-word{position:absolute;left:28px;bottom:21px;color:var(--ink);font-size:30px;font-weight:900;letter-spacing:2px}
    .feature-copy{padding:24px}
    .feature-copy h3{font-size:26px;margin:12px 0 8px}
    .feature-copy p,.content-card p{font-size:14px;color:var(--muted);margin-bottom:16px}
    .tag{display:inline-flex;background:#e4f1ea;color:#28745e;padding:3px 9px;border-radius:20px;font-size:12px;font-weight:800}
    .tag.orange{background:#fbe4d2;color:#a95320}
    .meta{display:flex;justify-content:space-between;align-items:center;gap:10px;color:var(--soft);font-size:12px}
    .text-link{color:var(--ink);font-weight:800}
    .text-link:hover{color:var(--orange)}
    .side-news{display:grid;gap:12px}
    .side-item{padding:18px;background:#fff;border:1px solid var(--line);border-radius:15px}
    .side-item h3{font-size:17px;margin:8px 0 5px}
    .side-item p{font-size:13px;color:var(--muted);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .content-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
    .content-card:nth-child(2){margin-top:24px}
    .content-card:nth-child(4){margin-top:-14px}
    .content-card .card-body{padding:20px}
    .card-index{float:right;color:#b9c8bf;font-size:22px;font-weight:900}
    .empty-state{padding:36px;text-align:center;background:#fff;border:1px dashed #b9c9bd;border-radius:var(--radius);color:var(--muted)}
    .empty-icon{width:48px;height:48px;border-radius:15px;background:#e4f1ea;color:var(--jade);display:grid;place-items:center;margin:0 auto 12px;font-size:23px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:12px}
    .topic-tag{padding:12px 17px;border-radius:12px;background:#fff;border:1px solid var(--line);color:var(--ink);font-size:14px;font-weight:800}
    .topic-tag:nth-child(2n){background:#f6dcc7}
    .rank-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:35px;align-items:start}
    .rank-intro{padding:28px;border-radius:var(--radius);background:var(--ink);color:#fff}
    .rank-intro h2{color:#fff}
    .rank-intro p{color:#c9d9d1;margin-bottom:0}
    .rank-list{display:grid;gap:10px}
    .rank-card{display:grid;grid-template-columns:42px 1fr auto;align-items:center;gap:14px;padding:15px 18px}
    .rank-no{font-size:24px;font-weight:900;color:var(--orange)}
    .rank-card h3{font-size:16px;margin:0 0 3px}
    .rank-card small{color:var(--soft);font-size:12px}
    .note-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .note-card{padding:25px;background:#e7f1e9}
    .note-card.accent{background:#f6dcc7}
    .note-card h3{margin-top:12px}
    .note-card p{color:var(--muted);font-size:14px;margin-bottom:0}
    .note-icon{width:42px;height:42px;border-radius:13px;background:#fff;color:var(--jade);display:grid;place-items:center;font-size:20px;font-weight:900}
    .app-strip{padding:27px 30px;background:var(--ink);color:#fff;display:flex;justify-content:space-between;align-items:center;gap:25px}
    .app-strip h2{color:#fff;font-size:25px;margin:0 0 7px}
    .app-strip p{color:#c9d9d1;margin:0;font-size:14px}
    .app-points{display:flex;gap:10px;flex-wrap:wrap;margin-top:15px}
    .app-points span{padding:5px 10px;border-radius:20px;background:rgba(255,255,255,.1);font-size:12px;color:#d9e8df}
    .app-strip .btn{flex:none}
    .load-more{text-align:center;padding-top:34px}
    .finish-tip{text-align:center;color:var(--soft);font-size:13px;margin-top:16px}
    .site-footer{background:var(--ink);color:#c9d9d1;padding:60px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:50px}
    .footer-brand p{max-width:360px;color:#b4c9bf;font-size:14px;margin:17px 0 0}
    .footer-brand .brand{color:#fff}
    .footer-title{font-size:15px;color:#fff;margin:4px 0 16px}
    .footer-links{display:grid;gap:9px}
    .footer-links a{font-size:14px;color:#b4c9bf;transition:.2s}
    .footer-links a:hover{color:#f2b486;padding-left:3px}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.13);margin-top:42px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#91aaa0;font-size:12px}
    @media (max-width:1024px){
      .container{width:min(var(--max),calc(100% - 48px))}
      .nav-list{gap:0}.nav-list a{padding:9px 7px;font-size:13px}
      .header-action{display:none}.content-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:767px){
      .container{width:calc(100% - 32px)}
      .nav-wrap{height:68px}.menu-toggle{display:block}
      .nav-list{display:none;position:absolute;top:68px;left:0;right:0;padding:12px 16px 18px;background:var(--cream);border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-list.is-open{display:flex}.nav-list a{display:block;padding:12px 14px}
      .intro-row{align-items:start}.intro-badge{width:74px;height:74px;border-radius:21px;font-size:20px;flex:none}
      .page-intro{padding:45px 0 38px}.section{padding:58px 0}
      .feature-layout,.rank-layout,.note-grid{grid-template-columns:1fr}
      .content-grid{grid-template-columns:1fr}.content-card:nth-child(2),.content-card:nth-child(4){margin-top:0}
      .section-head{display:block;margin-bottom:23px}.section-head .lead{margin-top:10px}
      .app-strip{display:block;padding:25px}.app-strip .btn{margin-top:20px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-brand{grid-column:1/-1}
      .footer-bottom{display:block}.footer-bottom span{display:block;margin-bottom:5px}
    }
    @media (max-width:520px){
      h1{font-size:34px}.lead{font-size:15px}
      .feature-copy h3{font-size:21px}.rank-card{grid-template-columns:34px 1fr}
      .rank-card .text-link{grid-column:2}.footer-grid{grid-template-columns:1fr}
    }
    :focus-visible{outline:3px solid rgba(237,139,74,.55);outline-offset:3px}

/* roulang page: article */
:root{
      --ink:#123c35;--ink-deep:#0b2d27;--orange:#ed8b4a;--jade:#45a88d;
      --cream:#faf8f3;--mist:#f1f4ee;--white:#fff;--text:#1d2925;
      --muted:#60706a;--soft:#8b9792;--line:#dce5dd;--radius:18px;
      --shadow:0 14px 36px rgba(18,60,53,.09);--shadow-lg:0 24px 55px rgba(18,60,53,.16);
      --max:1200px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none}
    a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(237,139,74,.45);outline-offset:3px}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 64px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(250,248,243,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
    .nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);letter-spacing:-.5px;white-space:nowrap}
    .brand-mark{width:38px;height:38px;border-radius:12px;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:900;box-shadow:inset 0 -4px 0 rgba(0,0,0,.13)}
    .brand small{display:block;font-size:10px;letter-spacing:1.4px;color:var(--jade);line-height:1}
    .brand strong{display:block;font-size:15px;line-height:1.15}
    .nav-list{display:flex;align-items:center;gap:4px;list-style:none;padding:0;margin:0}
    .nav-list a{font-size:14px;font-weight:700;color:var(--muted);padding:10px 11px;border-radius:9px;transition:.2s}
    .nav-list a:hover,.nav-list a.active{color:var(--ink);background:#e7eee8}
    .nav-list a.active{box-shadow:inset 0 -2px 0 var(--orange)}
    .header-action{white-space:nowrap}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:11px;padding:12px 19px;font-weight:800;font-size:14px;transition:transform .2s,background .2s,box-shadow .2s}
    .btn:hover{transform:translateY(-2px);box-shadow:0 9px 20px rgba(18,60,53,.16)}
    .btn-primary{background:var(--ink);color:#fff}
    .btn-primary:hover{background:var(--ink-deep);color:#fff}
    .btn-orange{background:var(--orange);color:#382014}
    .btn-orange:hover{background:#f09d61;color:#382014}
    .btn-outline{border-color:#b8c9bd;color:var(--ink);background:transparent}
    .btn-outline:hover{background:#fff}
    .menu-toggle{display:none;border:0;background:var(--mist);color:var(--ink);width:42px;height:42px;border-radius:10px;font-size:20px}
    main{overflow:hidden}
    .article-head{padding:72px 0 48px;background:radial-gradient(circle at 82% 15%,#e3eee5 0,rgba(227,238,229,0) 31%),var(--cream)}
    .crumbs{display:flex;align-items:center;gap:9px;color:var(--soft);font-size:13px;margin-bottom:24px;white-space:nowrap;overflow:hidden}
    .crumbs a:hover{color:var(--ink)}
    .crumbs .current{overflow:hidden;text-overflow:ellipsis;color:var(--muted)}
    .article-head-inner{max-width:900px}
    .eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--jade);font-weight:800;font-size:13px;letter-spacing:.4px}
    .eyebrow:before{content:"";width:20px;height:2px;background:var(--orange)}
    h1,h2,h3{color:var(--ink);line-height:1.25;letter-spacing:-.5px}
    h1{font-size:clamp(32px,4.4vw,52px);margin:15px 0 19px;overflow-wrap:anywhere}
    .article-intro{font-size:18px;color:var(--muted);max-width:820px;margin:0}
    .article-meta{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:27px;color:var(--soft);font-size:13px}
    .meta-item{display:inline-flex;align-items:center;gap:7px}
    .meta-dot{width:6px;height:6px;background:var(--orange);border-radius:50%}
    .reading-layout{display:grid;grid-template-columns:minmax(0,820px) 260px;gap:58px;align-items:start;padding:66px 0 86px}
    .summary-box{background:#eaf2eb;border:1px solid #d4e5d8;border-radius:16px;padding:23px 26px;margin-bottom:32px}
    .summary-box strong{display:block;color:var(--ink);font-size:14px;margin-bottom:7px}
    .summary-box p{margin:0;color:var(--muted);font-size:15px}
    .article-content{font-size:17px;line-height:1.9;color:#33433e}
    .article-content h2{font-size:30px;margin:42px 0 16px;padding-left:15px;border-left:4px solid var(--orange)}
    .article-content h3{font-size:21px;margin:30px 0 10px}
    .article-content p{margin:0 0 20px}
    .article-content ul,.article-content ol{padding-left:25px;margin:0 0 23px}
    .article-content li{margin:7px 0}
    .article-content blockquote{margin:27px 0;padding:19px 23px;border-left:4px solid var(--jade);background:var(--mist);border-radius:0 12px 12px 0;color:var(--muted)}
    .article-content img{border-radius:14px;margin:27px auto}
    .article-content table{width:100%;border-collapse:collapse;margin:26px 0;background:#fff;border:1px solid var(--line);font-size:14px}
    .article-content th,.article-content td{padding:12px 14px;border:1px solid var(--line);text-align:left}
    .article-content th{background:var(--mist);color:var(--ink)}
    .article-content a{color:var(--ink);font-weight:700;text-decoration:underline;text-decoration-color:#a6cbbb;text-underline-offset:3px}
    .toc-card{position:sticky;top:105px;border:1px solid var(--line);border-radius:16px;background:#fff;padding:21px}
    .toc-card h2{font-size:17px;margin:0 0 14px}
    .toc-card ul{list-style:none;padding:0;margin:0}
    .toc-card li{border-top:1px solid #edf1ed;padding:9px 0;font-size:13px;color:var(--muted)}
    .toc-card li:first-child{border-top:0}
    .toc-card a{display:block;transition:.2s}
    .toc-card a:hover{color:var(--orange);padding-left:4px}
    .article-empty{padding:58px 28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);text-align:center}
    .article-empty h2{font-size:25px;margin:0 0 10px}
    .article-empty p{color:var(--muted);margin:0 0 22px}
    .download-note{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:24px 26px;margin:38px 0;background:var(--ink);border-radius:16px;color:#fff}
    .download-note h3{color:#fff;font-size:19px;margin:0 0 5px}
    .download-note p{margin:0;color:#c9d9d0;font-size:14px}
    .related-section{padding:72px 0;background:var(--mist)}
    .section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:18px;margin-bottom:28px}
    .section-head h2{font-size:31px;margin:0}
    .section-head p{color:var(--muted);margin:7px 0 0}
    .related-grid{display:grid;grid-template-columns:1.35fr .9fr .9fr;gap:18px}
    .related-card{display:flex;flex-direction:column;min-height:252px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
    .related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .related-visual{height:112px;background:linear-gradient(135deg,#dcebe0,#f5ddc8);position:relative;overflow:hidden}
    .related-card:first-child .related-visual{height:142px;background:linear-gradient(135deg,#123c35,#34735f)}
    .related-visual:before,.related-visual:after{content:"";position:absolute;border:2px solid rgba(255,255,255,.45);border-radius:50%}
    .related-visual:before{width:96px;height:96px;right:20px;top:18px}
    .related-visual:after{width:44px;height:44px;right:87px;top:48px}
    .related-body{display:flex;flex:1;flex-direction:column;padding:18px}
    .tag{display:inline-flex;align-self:flex-start;background:#e4f1ea;color:#28745e;padding:3px 9px;border-radius:20px;font-size:12px;font-weight:800}
    .tag.orange{background:#fbe4d2;color:#a95320}
    .related-body h3{font-size:18px;margin:10px 0 8px}
    .related-body p{font-size:13px;line-height:1.65;color:var(--muted);margin:0 0 14px}
    .card-meta{margin-top:auto;display:flex;justify-content:space-between;gap:10px;color:var(--soft);font-size:12px}
    .return-section{padding:54px 0;background:var(--cream)}
    .return-box{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:33px 36px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
    .return-box h2{font-size:24px;margin:0 0 7px}
    .return-box p{margin:0;color:var(--muted)}
    .return-actions{display:flex;gap:12px;flex-wrap:wrap}
    .support-section{padding:72px 0;background:var(--ink)}
    .support-box{display:grid;grid-template-columns:1fr auto;align-items:center;gap:34px}
    .support-copy h2{font-size:31px;color:#fff;margin:0 0 9px}
    .support-copy p{margin:0;color:#c9d9d0;max-width:650px}
    .helpfulness{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
    .helpfulness span{color:#d9e7df;font-size:14px;font-weight:700}
    .vote-btn{border:1px solid rgba(255,255,255,.28);border-radius:10px;background:transparent;color:#fff;padding:9px 14px;font-size:14px;font-weight:700;transition:.2s}
    .vote-btn:hover,.vote-btn.active{background:var(--orange);border-color:var(--orange);color:#382014}
    .site-footer{background:var(--ink-deep);color:#cbd8d1;padding:58px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.55fr 1fr 1fr;gap:55px;padding-bottom:42px}
    .footer-brand p{max-width:390px;margin:17px 0 0;color:#adc2b8;font-size:14px}
    .footer-title{font-size:14px;color:#fff;margin:7px 0 15px}
    .footer-links{display:grid;gap:9px}
    .footer-links a{font-size:14px;color:#b7c9c0;transition:.2s}
    .footer-links a:hover{color:#f5bd90;padding-left:3px}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.13);padding-top:19px;display:flex;justify-content:space-between;gap:18px;color:#8ead9f;font-size:12px}
    @media (max-width:1024px){
      .nav-list a{padding:9px 7px;font-size:13px}
      .reading-layout{grid-template-columns:minmax(0,1fr) 220px;gap:30px}
      .related-grid{grid-template-columns:repeat(3,1fr)}
      .header-action{display:none}
    }
    @media (max-width:767px){
      .container{width:min(100% - 32px,var(--max))}
      .nav-wrap{height:68px}
      .menu-toggle{display:grid;place-items:center}
      .site-header nav{position:absolute;left:0;right:0;top:68px;background:var(--cream);border-bottom:1px solid var(--line);display:none}
      .site-header nav.open{display:block}
      .nav-list{display:grid;gap:3px;padding:12px 16px 17px}
      .nav-list a{display:block;padding:11px 12px}
      .article-head{padding:43px 0 33px}
      .article-intro{font-size:16px}
      .reading-layout{display:block;padding:42px 0 58px}
      .toc-card{position:relative;top:auto;margin:0 0 27px}
      .toc-card ul{display:grid;grid-template-columns:1fr 1fr;column-gap:16px}
      .article-content{font-size:16px}
      .article-content h2{font-size:26px;margin-top:34px}
      .article-content table{display:block;overflow-x:auto;white-space:nowrap}
      .download-note{display:block;padding:22px}
      .download-note .btn{margin-top:16px}
      .related-section,.support-section{padding:55px 0}
      .related-grid{grid-template-columns:1fr}
      .related-card,.related-card:first-child{min-height:0}
      .related-card:first-child .related-visual,.related-visual{height:120px}
      .return-box,.support-box{display:block;padding:27px 22px}
      .return-actions{margin-top:18px}
      .helpfulness{margin-top:21px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin:4px 0}
    }
    @media (max-width:520px){
      h1{font-size:32px}
      .crumbs{font-size:12px}
      .article-meta{gap:8px 14px}
      .summary-box{padding:19px}
      .toc-card ul{grid-template-columns:1fr}
      .section-head{display:block}
      .section-head h2{font-size:27px}
      .footer-grid{grid-template-columns:1fr}
      .footer-brand{grid-column:auto}
      .btn{width:100%}
      .return-actions .btn{width:100%}
    }

/* roulang page: category2 */
:root{
      --ink:#123c35;--ink-deep:#0b2d27;--orange:#ed8b4a;--jade:#45a88d;
      --cream:#faf8f3;--mist:#f1f4ee;--white:#fff;--text:#1d2925;
      --muted:#60706a;--soft:#8b9792;--line:#dce5dd;--radius:18px;
      --shadow:0 14px 36px rgba(18,60,53,.09);--shadow-lg:0 24px 55px rgba(18,60,53,.16);
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(69,168,141,.4);outline-offset:3px}
    .container{width:min(var(--max),calc(100% - 64px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(250,248,243,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
    .nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);letter-spacing:-.5px;white-space:nowrap}
    .brand-mark{width:38px;height:38px;border-radius:12px;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:900;box-shadow:inset 0 -4px 0 rgba(0,0,0,.13)}
    .brand small{display:block;font-size:10px;letter-spacing:1.4px;color:var(--jade);line-height:1}
    .brand strong{display:block;font-size:15px;line-height:1.15}
    .nav-list{display:flex;align-items:center;gap:4px;list-style:none;padding:0;margin:0}
    .nav-list a{font-size:14px;font-weight:700;color:var(--muted);padding:10px 11px;border-radius:9px;transition:.2s}
    .nav-list a:hover,.nav-list a.active{color:var(--ink);background:#e7eee8}
    .nav-list a.active{box-shadow:inset 0 -2px 0 var(--orange)}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:11px;padding:12px 19px;font-weight:800;font-size:14px;transition:transform .2s,background .2s,box-shadow .2s}
    .btn:hover{transform:translateY(-2px);box-shadow:0 9px 20px rgba(18,60,53,.16)}
    .btn-primary{background:var(--ink);color:#fff}
    .btn-primary:hover{background:var(--ink-deep)}
    .btn-orange{background:var(--orange);color:#382014}
    .btn-orange:hover{background:#f09d61}
    .btn-outline{border-color:#b8c9bd;color:var(--ink);background:transparent}
    .btn-outline:hover{background:#fff}
    .menu-toggle{display:none;border:0;background:var(--mist);color:var(--ink);width:42px;height:42px;border-radius:10px;font-size:20px}
    main{overflow:hidden}
    .section{padding:78px 0}
    .section-soft{background:var(--mist)}
    .section-dark{background:var(--ink);color:#fff}
    .section-dark h2,.section-dark h3{color:#fff}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:22px;margin-bottom:32px}
    .section-head h2{margin:6px 0 0;font-size:31px;letter-spacing:-1px}
    .section-head p{margin:0;max-width:590px;color:var(--muted)}
    .eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--jade);font-weight:800;font-size:13px;letter-spacing:.4px}
    .eyebrow:before{content:"";width:20px;height:2px;background:var(--orange)}
    .breadcrumb{display:flex;gap:9px;align-items:center;margin:0 0 22px;padding:0;list-style:none;font-size:13px;color:var(--muted)}
    .breadcrumb li+li:before{content:"/";color:#a7b3ad;margin-right:9px}
    .title-band{padding:52px 0 56px;background:linear-gradient(118deg,#e6eee5 0%,#faf8f3 56%,#f7e1d0 100%);border-bottom:1px solid var(--line);position:relative}
    .title-band:after{content:"";position:absolute;right:8%;top:16px;width:180px;height:180px;border:1px solid rgba(18,60,53,.12);border-radius:50%;box-shadow:30px 25px 0 -1px rgba(237,139,74,.17),-25px 40px 0 -1px rgba(69,168,141,.15)}
    .title-content{position:relative;z-index:1}
    .title-top{display:flex;align-items:center;gap:15px}
    .title-icon{width:54px;height:54px;display:grid;place-items:center;border-radius:17px;background:var(--ink);color:#fff;font-size:23px;box-shadow:var(--shadow)}
    h1{font-size:44px;line-height:1.18;letter-spacing:-1.8px;margin:0}
    .title-copy{max-width:690px;margin:18px 0 0;color:var(--muted);font-size:17px}
    .topic-pills{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
    .topic-pills span,.tag{display:inline-flex;align-items:center;border-radius:999px;font-size:12px;font-weight:800}
    .topic-pills span{padding:5px 11px;background:rgba(255,255,255,.75);border:1px solid var(--line);color:var(--ink)}
    .tag{padding:4px 10px;background:#e4f1ea;color:#28745e}
    .tag.orange{background:#fbe4d2;color:#a95320}
    .news-stage{display:grid;grid-template-columns:1.18fr .82fr;gap:20px}
    .feature-news,.news-item,.article-row,.rank-list,.notice-strip,.subscribe-card{border:1px solid var(--line);background:#fff;border-radius:var(--radius)}
    .feature-news{overflow:hidden;transition:.25s}
    .feature-news:hover,.news-item:hover,.article-row:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .feature-cover{min-height:255px;padding:28px;display:flex;align-items:flex-end;background:linear-gradient(135deg,#123c35 0%,#1f6455 58%,#74b6a1 100%);position:relative;overflow:hidden}
    .feature-cover:before{content:"NG28";position:absolute;right:18px;top:4px;font-size:80px;font-weight:900;color:rgba(255,255,255,.12);letter-spacing:-7px}
    .feature-cover:after{content:"";position:absolute;width:170px;height:170px;border:2px solid rgba(237,139,74,.68);border-radius:50%;right:-42px;bottom:-78px}
    .cover-note{position:relative;z-index:1;color:#fff;font-size:18px;font-weight:800;max-width:260px;line-height:1.45}
    .feature-body{padding:25px}
    .feature-body h3{font-size:25px;line-height:1.35;margin:12px 0 8px}
    .feature-body p,.article-row p{color:var(--muted);font-size:14px;margin:0 0 16px}
    .meta{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--soft);font-size:12px}
    .text-link{color:var(--ink);font-weight:800}
    .text-link:hover{color:var(--orange)}
    .news-stack{display:grid;gap:12px}
    .news-item{padding:17px 19px;transition:.2s}
    .news-item h3{font-size:16px;line-height:1.45;margin:8px 0 5px}
    .news-item p{margin:0;color:var(--muted);font-size:13px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .news-item .meta{margin-top:9px}
    .empty-state{padding:46px 24px;text-align:center;background:#fff;border:1px dashed #b8c9bd;border-radius:var(--radius);color:var(--muted)}
    .empty-symbol{width:50px;height:50px;margin:0 auto 12px;border-radius:16px;background:#e4f1ea;color:var(--jade);display:grid;place-items:center;font-size:22px;font-weight:900}
    .article-layout{display:grid;grid-template-columns:1fr 260px;gap:30px;align-items:start}
    .article-list{display:grid;gap:15px}
    .article-row{display:grid;grid-template-columns:98px 1fr;gap:18px;padding:17px;transition:.25s}
    .article-art{min-height:104px;border-radius:13px;background:linear-gradient(145deg,#d8e8db,#f8d9c2);display:grid;place-items:center;color:var(--ink);font-size:23px;font-weight:900;position:relative;overflow:hidden}
    .article-art:after{content:"";position:absolute;width:52px;height:52px;border-radius:50%;border:3px solid rgba(18,60,53,.2);right:-11px;bottom:-12px}
    .article-row h3{font-size:18px;line-height:1.42;margin:8px 0 6px}
    .article-row p{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:10px}
    .side-topics{padding:22px;background:var(--ink);border-radius:var(--radius);color:#fff;position:sticky;top:103px}
    .side-topics h3{font-size:18px;margin:0 0 17px}
    .side-topics a{display:flex;justify-content:space-between;align-items:center;padding:11px 0;border-top:1px solid rgba(255,255,255,.15);font-size:14px;font-weight:700;color:#d8e5dd}
    .side-topics a:hover{color:#f5bd90}
    .notice-strip{padding:22px 25px;display:flex;align-items:center;gap:18px;border-color:rgba(237,139,74,.44);background:#fff9f4}
    .notice-dot{flex:0 0 43px;width:43px;height:43px;display:grid;place-items:center;border-radius:14px;background:var(--orange);color:#462717;font-weight:900}
    .notice-strip h3{font-size:17px;margin:0 0 2px}
    .notice-strip p{margin:0;color:var(--muted);font-size:14px}
    .notice-date{margin-left:auto;white-space:nowrap;font-size:13px;font-weight:800;color:#a95320}
    .timeline{position:relative;margin-top:10px;padding-left:29px}
    .timeline:before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:#bed5c6}
    .timeline-item{position:relative;padding:0 0 23px}
    .timeline-item:last-child{padding-bottom:0}
    .timeline-item:before{content:"";position:absolute;left:-27px;top:7px;width:12px;height:12px;border-radius:50%;background:var(--orange);border:3px solid var(--mist)}
    .timeline-date{font-size:12px;font-weight:800;color:var(--jade)}
    .timeline-item h3{font-size:17px;margin:2px 0 3px}
    .timeline-item p{color:var(--muted);font-size:14px;margin:0}
    .rank-wrap{display:grid;grid-template-columns:.86fr 1.14fr;gap:34px;align-items:center}
    .rank-copy h2{font-size:32px;letter-spacing:-1px;margin:8px 0 12px}
    .rank-copy p{color:#c5d7cc;margin-bottom:0}
    .rank-list{overflow:hidden}
    .rank-item{display:grid;grid-template-columns:50px 1fr auto;align-items:center;gap:14px;padding:15px 17px;border-bottom:1px solid var(--line)}
    .rank-item:last-child{border-bottom:0}
    .rank-no{font-size:22px;font-weight:900;color:#abc9ba}
    .rank-item:first-child .rank-no{color:var(--orange)}
    .rank-item h3{font-size:15px;line-height:1.4;margin:0}
    .rank-item span{font-size:12px;color:var(--soft)}
    .rank-item a:hover h3{color:var(--orange)}
    .subscribe-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:center}
    .subscribe-copy h2{font-size:30px;margin:7px 0 10px;letter-spacing:-1px}
    .subscribe-copy p{color:var(--muted);margin:0}
    .subscribe-card{padding:23px;box-shadow:var(--shadow)}
    .form-grid{display:grid;grid-template-columns:1.2fr .8fr auto;gap:10px}
    input,select{min-width:0;width:100%;border:1px solid var(--line);border-radius:10px;background:#fff;padding:11px 12px;color:var(--text);outline:none;transition:.2s}
    input:focus,select:focus{border-color:var(--jade);box-shadow:0 0 0 3px rgba(69,168,141,.13)}
    .form-note{font-size:12px;color:var(--soft);margin:11px 0 0}
    .load-zone{text-align:center;padding:54px 20px;border-top:1px solid var(--line)}
    .load-zone p{margin:0 0 16px;color:var(--muted)}
    .site-footer{background:var(--ink);color:#d6e1da;padding:55px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.45fr .75fr .75fr;gap:55px}
    .footer-brand .brand{color:#fff;margin-bottom:17px}
    .footer-brand p{max-width:370px;font-size:14px;color:#bfd1c6;margin:0}
    .footer-title{font-size:15px;color:#fff;margin:4px 0 15px}
    .footer-links{display:grid;gap:8px}
    .footer-links a{font-size:14px;color:#bfd1c6;transition:.2s}
    .footer-links a:hover{color:#f5bd90;padding-left:3px}
    .footer-bottom{display:flex;justify-content:space-between;gap:18px;border-top:1px solid rgba(255,255,255,.14);padding-top:18px;margin-top:39px;font-size:12px;color:#a9c0b3}
    @media(max-width:1024px){
      .container{width:min(var(--max),calc(100% - 48px))}
      .nav-list a{padding:9px 7px;font-size:13px}
      .article-layout{grid-template-columns:1fr 220px}
    }
    @media(max-width:767px){
      .container{width:min(var(--max),calc(100% - 32px))}
      .nav-wrap{height:68px}
      .menu-toggle{display:grid;place-items:center}
      .nav-list{display:none;position:absolute;top:68px;left:16px;right:16px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);align-items:stretch}
      .nav-list.open{display:flex;flex-direction:column}
      .nav-list li,.nav-list a{width:100%}
      .nav-list a{display:block;padding:11px}
      h1{font-size:34px}
      .title-band{padding:38px 0 42px}
      .title-band:after{opacity:.45;right:-60px}
      .section{padding:59px 0}
      .section-head{display:block;margin-bottom:25px}
      .section-head h2{font-size:27px}
      .section-head p{margin-top:9px}
      .news-stage,.article-layout,.rank-wrap,.subscribe-grid{grid-template-columns:1fr}
      .side-topics{position:static}
      .feature-cover{min-height:195px}
      .article-row{grid-template-columns:76px 1fr;gap:13px;padding:13px}
      .article-art{min-height:82px}
      .notice-strip{align-items:flex-start;padding:18px}
      .notice-date{margin-left:0;position:absolute;right:20px;margin-top:2px}
      .notice-strip{position:relative;padding-right:88px}
      .form-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr;gap:28px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin:5px 0}
    }
    @media(max-width:520px){
      .brand strong{font-size:13px}
      .brand-mark{width:35px;height:35px}
      .title-top{align-items:flex-start}
      .title-icon{width:46px;height:46px;border-radius:14px;font-size:20px}
      .topic-pills span{font-size:11px}
      .feature-body{padding:20px}
      .feature-body h3{font-size:21px}
      .rank-item{grid-template-columns:38px 1fr;gap:10px}
      .rank-item span{grid-column:2}
    }

/* roulang page: category3 */
:root{
      --ink:#123c35;--ink-deep:#0b2d27;--orange:#ed8b4a;--jade:#45a88d;
      --cream:#faf8f3;--mist:#f1f4ee;--white:#fff;--text:#1d2925;
      --muted:#60706a;--soft:#8b9792;--line:#dce5dd;--radius:18px;
      --shadow:0 14px 36px rgba(18,60,53,.09);--shadow-lg:0 24px 55px rgba(18,60,53,.16);
      --max:1200px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 64px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(250,248,243,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
    .nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);letter-spacing:-.5px;white-space:nowrap}
    .brand-mark{width:38px;height:38px;border-radius:12px;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:900;box-shadow:inset 0 -4px 0 rgba(0,0,0,.13)}
    .brand small{display:block;font-size:10px;letter-spacing:1.4px;color:var(--jade);line-height:1}
    .brand strong{display:block;font-size:15px;line-height:1.15}
    .nav-list{display:flex;align-items:center;gap:4px;list-style:none;padding:0;margin:0}
    .nav-list a{font-size:14px;font-weight:700;color:var(--muted);padding:10px 11px;border-radius:9px;transition:.2s}
    .nav-list a:hover,.nav-list a.active{color:var(--ink);background:#e7eee8}
    .nav-list a.active{box-shadow:inset 0 -2px 0 var(--orange)}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:11px;padding:12px 19px;font-weight:800;font-size:14px;transition:transform .2s,background .2s,box-shadow .2s}
    .btn:hover{transform:translateY(-2px);box-shadow:0 9px 20px rgba(18,60,53,.16)}
    .btn-primary{background:var(--ink);color:#fff}
    .btn-primary:hover{background:var(--ink-deep);color:#fff}
    .btn-orange{background:var(--orange);color:#382014}
    .btn-orange:hover{background:#f09d61;color:#382014}
    .btn-outline{border-color:#b8c9bd;color:var(--ink);background:transparent}
    .btn-outline:hover{background:#fff}
    .menu-toggle{display:none;border:0;background:var(--mist);color:var(--ink);width:42px;height:42px;border-radius:10px;font-size:20px}
    main{overflow:hidden}
    .section{padding:82px 0}
    .section-soft{background:var(--mist)}
    .section-dark{background:var(--ink);color:#fff}
    .eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--jade);font-weight:800;font-size:13px;letter-spacing:.4px}
    .eyebrow:before{content:"";width:20px;height:2px;background:var(--orange)}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(34px,4vw,48px);line-height:1.18;letter-spacing:-1.5px;color:var(--ink);font-weight:900}
    h2{font-size:clamp(27px,3vw,35px);line-height:1.25;color:var(--ink);font-weight:900;letter-spacing:-.8px}
    h3{font-size:20px;line-height:1.35;color:var(--ink);font-weight:850}
    .lead{color:var(--muted);font-size:17px;max-width:680px}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:22px;margin-bottom:34px}
    .section-head p{margin-bottom:0;color:var(--muted);max-width:550px}
    .page-band{padding:62px 0 54px;background:radial-gradient(circle at 84% 30%,#deede3 0,rgba(222,237,227,0) 31%),var(--cream);border-bottom:1px solid var(--line)}
    .breadcrumbs{display:flex;gap:9px;align-items:center;color:var(--soft);font-size:13px;margin-bottom:23px}
    .breadcrumbs span{color:var(--jade)}
    .band-content{display:flex;align-items:end;justify-content:space-between;gap:35px}
    .band-copy h1{margin:10px 0 14px}
    .band-copy p{margin:0;max-width:650px;color:var(--muted)}
    .app-badge{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:15px 18px;box-shadow:var(--shadow);min-width:220px}
    .app-icon{width:45px;height:45px;border-radius:14px;background:var(--ink);color:#f6c193;display:grid;place-items:center;font-weight:900}
    .app-badge strong{display:block;color:var(--ink)}
    .app-badge small{color:var(--soft)}
    .download-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:60px;align-items:center}
    .download-panel{background:#fff;border:1px solid var(--line);border-radius:24px;padding:32px;box-shadow:var(--shadow)}
    .download-panel h2{margin:12px 0 10px}
    .download-panel p{color:var(--muted);margin-bottom:23px}
    .download-actions{display:flex;flex-wrap:wrap;gap:12px}
    .download-meta{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
    .tag{display:inline-flex;background:#e4f1ea;color:#28745e;padding:4px 10px;border-radius:20px;font-size:12px;font-weight:800}
    .tag.orange{background:#fbe4d2;color:#a95320}
    .qr-area{display:flex;align-items:center;gap:20px;margin-top:24px;padding-top:22px;border-top:1px solid var(--line)}
    .qr-box{width:92px;height:92px;border-radius:12px;background:#f0f3ed;border:1px dashed #a9bdb0;display:grid;place-items:center;text-align:center;color:var(--soft);font-size:12px;padding:10px}
    .qr-area p{margin:0;font-size:13px;line-height:1.55}
    .device-wrap{min-height:400px;display:flex;justify-content:center;align-items:center;position:relative}
    .device{width:226px;height:420px;border:9px solid #0d322b;border-radius:34px;background:#fff;box-shadow:var(--shadow-lg);position:relative;padding:25px 14px 15px}
    .device:before{content:"";position:absolute;top:8px;left:50%;transform:translateX(-50%);width:70px;height:7px;background:#0d322b;border-radius:10px}
    .device-top{display:flex;justify-content:space-between;color:var(--soft);font-size:11px;margin-bottom:16px}
    .device-title{font-size:20px;font-weight:900;color:var(--ink);margin-bottom:13px}
    .device-feature{height:88px;border-radius:15px;background:#e0eee4;padding:13px;color:var(--ink);font-weight:800;font-size:13px}
    .device-feature span{display:block;color:#5a806f;font-size:11px;margin-top:9px}
    .device-line{height:12px;border-radius:8px;background:#edf1ec;margin:13px 0}
    .device-line.short{width:62%}
    .device-nav{position:absolute;bottom:17px;left:16px;right:16px;border-top:1px solid var(--line);padding-top:10px;display:flex;justify-content:space-around;color:var(--jade);font-size:10px}
    .float-label{position:absolute;padding:10px 14px;border-radius:12px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);font-size:12px;font-weight:800;color:var(--ink)}
    .float-label.one{left:9%;top:17%}.float-label.two{right:5%;bottom:18%;background:var(--orange);border-color:var(--orange);color:#402314}
    .platform-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .platform-card{padding:27px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:.25s}
    .platform-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .platform-icon{width:46px;height:46px;display:grid;place-items:center;border-radius:14px;background:#e4f1ea;color:var(--ink);font-weight:900;margin-bottom:18px}
    .platform-card p{font-size:14px;color:var(--muted);margin:0}
    .requirement{margin-top:17px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--soft)}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);border-radius:20px;background:#fff;overflow:hidden}
    .step{padding:27px 24px;position:relative;border-right:1px solid var(--line)}
    .step:last-child{border-right:0}
    .step-number{font-size:14px;color:var(--orange);font-weight:900;letter-spacing:1px}
    .step h3{margin:12px 0 7px}
    .step p{font-size:14px;color:var(--muted);margin:0}
    .preview-strip{display:flex;gap:18px;overflow-x:auto;padding:6px 3px 16px;scrollbar-color:var(--jade) transparent}
    .mini-device{flex:0 0 190px;height:330px;border:7px solid var(--ink);border-radius:27px;background:#fff;padding:25px 12px 12px;box-shadow:0 9px 20px rgba(18,60,53,.1);position:relative}
    .mini-device:before{content:"";position:absolute;top:7px;left:50%;width:56px;height:5px;transform:translateX(-50%);background:var(--ink);border-radius:5px}
    .mini-device h3{font-size:17px;margin:8px 0 14px}
    .preview-card{height:72px;border-radius:12px;background:#e7f1e9;margin:10px 0;padding:11px;font-size:12px;color:var(--ink);font-weight:800}
    .preview-card.alt{background:#fbe4d2}.preview-card.dark{background:var(--ink);color:#fff}
    .mini-device small{color:var(--soft);font-size:10px}
    .updates-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:38px;align-items:start}
    .update-intro{padding:28px;border-radius:20px;background:var(--ink);color:#fff}
    .update-intro h2{color:#fff;margin:12px 0}.update-intro p{color:#c8d8d0;font-size:14px}
    .update-list{display:grid;gap:12px}
    .update-item{display:grid;grid-template-columns:105px 1fr auto;align-items:center;gap:18px;padding:18px 20px;background:#fff;border:1px solid var(--line);border-radius:15px;transition:.2s}
    .update-item:hover{box-shadow:var(--shadow);transform:translateX(3px)}
    .update-date{color:var(--jade);font-size:13px;font-weight:800}
    .update-item h3{font-size:16px;margin:0 0 3px}
    .update-item p{color:var(--muted);font-size:13px;margin:0}
    .faq-list{max-width:870px;margin:0 auto;display:grid;gap:11px}
    .faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:0 20px}
    .faq-item summary{cursor:pointer;list-style:none;padding:18px 0;font-weight:800;color:var(--ink);position:relative;padding-right:25px}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"+";position:absolute;right:0;color:var(--orange);font-size:22px;line-height:1}
    .faq-item[open] summary:after{content:"−"}
    .faq-answer{border-top:1px solid var(--line);padding:14px 0 18px;color:var(--muted);font-size:14px}
    .support-box{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:32px 36px;border-radius:22px;background:#f6dcc7}
    .support-box h2{margin:0 0 8px}.support-box p{margin:0;color:#74523f;font-size:14px}
    .empty-state{padding:28px;background:#fff;border:1px dashed #b9cbbf;border-radius:16px;color:var(--muted);text-align:center}
    .site-footer{background:var(--ink);color:#d3e1da;padding:58px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.45fr .7fr .8fr;gap:50px}
    .footer-brand p{color:#a9c0b5;max-width:360px;font-size:14px;margin:18px 0 0}
    .footer-title{font-size:15px;color:#fff;margin:4px 0 17px}
    .footer-links{display:grid;gap:9px}
    .footer-links a{font-size:13px;color:#b5c9c0;transition:.2s}
    .footer-links a:hover{color:#f2b17f}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.14);margin-top:42px;padding-top:18px;color:#8eaaa0;font-size:12px}
    :focus-visible{outline:3px solid rgba(237,139,74,.55);outline-offset:3px}
    @media(max-width:1024px){
      .container{width:min(var(--max),calc(100% - 48px))}
      .nav-list{gap:0}.nav-list a{padding:9px 7px;font-size:13px}
      .download-grid{gap:30px}.steps{grid-template-columns:repeat(2,1fr)}
      .step:nth-child(2){border-right:0}.step:nth-child(-n+2){border-bottom:1px solid var(--line)}
    }
    @media(max-width:767px){
      .container{width:calc(100% - 32px)}
      .nav-wrap{height:68px}.menu-toggle{display:block}
      .nav-list{display:none;position:absolute;left:16px;right:16px;top:76px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-list.show{display:flex}.nav-list a{display:block;padding:12px 14px}
      .nav-wrap>.btn-orange{display:none}
      .page-band{padding:42px 0}.band-content{display:block}.app-badge{margin-top:25px;width:max-content}
      .section{padding:58px 0}.section-head{display:block;margin-bottom:24px}.section-head p{margin-top:10px}
      .download-grid,.updates-layout{grid-template-columns:1fr;gap:28px}
      .download-panel{padding:23px}.device-wrap{min-height:370px}
      .platform-grid{grid-template-columns:1fr}.steps{grid-template-columns:1fr}
      .step{border-right:0;border-bottom:1px solid var(--line)}.step:last-child{border-bottom:0}
      .update-item{grid-template-columns:1fr;gap:5px}.update-item .text-link{margin-top:5px}
      .support-box{display:block;padding:25px}.support-box .btn{margin-top:20px}
      .footer-grid{grid-template-columns:1fr;gap:28px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:5px}
      .float-label.one{left:0}.float-label.two{right:0}
    }

/* roulang page: category4 */
:root{
      --ink:#123c35;--ink-deep:#0b2d27;--orange:#ed8b4a;--jade:#45a88d;
      --cream:#faf8f3;--mist:#f1f4ee;--white:#fff;--text:#1d2925;
      --muted:#60706a;--soft:#8b9792;--line:#dce5dd;--radius:18px;
      --shadow:0 14px 36px rgba(18,60,53,.09);--shadow-lg:0 24px 55px rgba(18,60,53,.16);
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none}
    a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(237,139,74,.45);outline-offset:3px}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 64px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(250,248,243,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
    .nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);letter-spacing:-.5px;white-space:nowrap}
    .brand-mark{width:38px;height:38px;border-radius:12px;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:900;box-shadow:inset 0 -4px 0 rgba(0,0,0,.13)}
    .brand small{display:block;font-size:10px;letter-spacing:1.4px;color:var(--jade);line-height:1}
    .brand strong{display:block;font-size:15px;line-height:1.15}
    .nav-list{display:flex;align-items:center;gap:4px;list-style:none;padding:0;margin:0}
    .nav-list a{font-size:14px;font-weight:700;color:var(--muted);padding:10px 11px;border-radius:9px;transition:.2s}
    .nav-list a:hover,.nav-list a.active{color:var(--ink);background:#e7eee8}
    .nav-list a.active{box-shadow:inset 0 -2px 0 var(--orange)}
    .header-action{display:inline-flex}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:11px;padding:12px 19px;font-weight:800;font-size:14px;transition:transform .2s,background .2s,box-shadow .2s}
    .btn:hover{transform:translateY(-2px);box-shadow:0 9px 20px rgba(18,60,53,.16)}
    .btn-primary{background:var(--ink);color:#fff}
    .btn-primary:hover{background:var(--ink-deep)}
    .btn-orange{background:var(--orange);color:#382014}
    .btn-orange:hover{background:#f09d61}
    .btn-outline{border-color:#b8c9bd;color:var(--ink);background:transparent}
    .btn-outline:hover{background:#fff}
    .menu-toggle{display:none;border:0;background:var(--mist);color:var(--ink);width:42px;height:42px;border-radius:10px;font-size:20px}
    main{overflow:hidden}
    .section{padding:82px 0}
    .section-soft{background:var(--mist)}
    .section-dark{background:var(--ink);color:#fff}
    .eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--jade);font-weight:800;font-size:13px;letter-spacing:.4px}
    .eyebrow:before{content:"";width:20px;height:2px;background:var(--orange)}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(34px,4vw,50px);line-height:1.15;letter-spacing:-1.5px;color:var(--ink);font-weight:900;margin:15px 0 18px}
    h2{font-size:clamp(27px,3vw,35px);line-height:1.25;color:var(--ink);font-weight:900;margin-bottom:14px}
    h3{font-size:19px;line-height:1.35;color:var(--ink);font-weight:850;margin-bottom:9px}
    .lead{color:var(--muted);max-width:720px;font-size:17px}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:22px;margin-bottom:32px}
    .section-head p{margin-bottom:0}
    .crumbs{display:flex;gap:9px;align-items:center;color:var(--soft);font-size:13px}
    .crumbs a:hover{color:var(--orange)}
    .page-band{padding:62px 0 58px;background:radial-gradient(circle at 80% 20%,#e4f0e4 0,rgba(228,240,228,0) 32%),var(--cream);border-bottom:1px solid var(--line)}
    .page-band-inner{display:flex;align-items:end;justify-content:space-between;gap:40px}
    .band-mark{width:76px;height:76px;border-radius:22px;background:var(--ink);color:#f6c29b;display:grid;place-items:center;font-weight:900;font-size:25px;box-shadow:var(--shadow)}
    .route{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-top:30px}
    .route-item{position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px 17px;min-height:140px;transition:.25s}
    .route-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .route-number{color:var(--orange);font-size:13px;font-weight:900;letter-spacing:1px}
    .route-item p{font-size:13px;color:var(--muted);margin:0;line-height:1.55}
    .guide-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:20px;align-items:stretch}
    .guide-list{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}
    .guide-card,.support-card,.login-card,.demo-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:23px;transition:.25s}
    .guide-card:hover,.support-card:hover,.login-card:hover,.demo-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .guide-card:nth-child(1){background:var(--ink);color:#fff}
    .guide-card:nth-child(1) h3{color:#fff}
    .guide-card:nth-child(1) p{color:#d1dfd8}
    .guide-card p,.support-card p,.login-card p,.demo-card p{font-size:14px;color:var(--muted);margin-bottom:14px}
    .guide-card .tag{margin-bottom:14px}
    .tag{display:inline-flex;background:#e4f1ea;color:#28745e;padding:3px 9px;border-radius:20px;font-size:12px;font-weight:800}
    .tag.orange{background:#fbe4d2;color:#a95320}
    .guide-feature{border-radius:var(--radius);background:#f6dcc7;padding:34px;display:flex;flex-direction:column;justify-content:space-between;min-height:370px;overflow:hidden;position:relative}
    .guide-feature:after{content:"NG28";position:absolute;right:-20px;bottom:5px;color:rgba(18,60,53,.08);font-size:96px;font-weight:900;letter-spacing:-8px}
    .feature-icon{width:54px;height:54px;border-radius:16px;background:var(--ink);color:#fff;display:grid;place-items:center;font-weight:900;font-size:17px}
    .cms-empty{grid-column:1/-1;padding:34px;text-align:center;border:1px dashed #b9cbbf;border-radius:16px;color:var(--muted);background:#fff}
    .cms-empty strong{display:block;color:var(--ink);margin-bottom:6px}
    .article-link{color:var(--ink);font-weight:800;font-size:14px}
    .article-link:hover{color:var(--orange)}
    .help-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
    .help-panel{padding:30px;border-radius:var(--radius);border:1px solid var(--line);background:#fff}
    .help-panel.dark{background:var(--ink);color:#fff;border-color:var(--ink)}
    .help-panel.dark h3{color:#fff}
    .help-panel.dark p{color:#cfddd7}
    .check-list{list-style:none;padding:0;margin:18px 0 0}
    .check-list li{display:flex;gap:11px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px}
    .check-list li:last-child{border-bottom:0}
    .check-list b{color:var(--jade);font-size:18px;line-height:1.2}
    .login-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:24px;align-items:stretch}
    .login-card{background:#e6f0e8;padding:32px}
    .qa-row{display:grid;grid-template-columns:130px 1fr;gap:18px;padding:17px 0;border-bottom:1px solid var(--line)}
    .qa-row:last-child{border-bottom:0}
    .qa-row b{color:var(--ink)}
    .qa-row p{font-size:14px;color:var(--muted);margin:0}
    .demo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
    .screen-shot{height:145px;border-radius:15px;background:#e5eee7;border:1px solid #d4e1d7;padding:16px;position:relative;overflow:hidden;margin-bottom:18px}
    .screen-shot:before{content:"";display:block;width:65%;height:12px;border-radius:5px;background:var(--ink);opacity:.9;margin-bottom:15px}
    .screen-shot span{display:block;height:12px;background:#fff;border-radius:5px;margin:9px 0;width:88%}
    .screen-shot span:nth-child(3){width:67%;background:#f4c39d}
    .screen-shot i{position:absolute;right:17px;bottom:18px;width:34px;height:34px;border-radius:50%;background:var(--jade)}
    .safety-layout{display:grid;grid-template-columns:1fr 1.3fr;gap:35px;align-items:center}
    .safety-box{background:#e3f0e6;border-radius:20px;padding:30px}
    .safety-box strong{display:block;font-size:34px;color:var(--ink);line-height:1}
    .safety-box span{display:block;color:var(--muted);font-size:13px;margin-top:8px}
    .safety-points{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    .safety-point{background:#fff;border:1px solid var(--line);border-radius:15px;padding:17px}
    .safety-point b{display:block;color:var(--ink);margin-bottom:4px}
    .safety-point p{font-size:13px;color:var(--muted);margin:0}
    .support-wrap{display:flex;justify-content:space-between;align-items:center;gap:25px;padding:30px;border-radius:20px;background:#f6dcc7}
    .support-wrap p{margin:0;color:#72533f;font-size:14px}
    .site-footer{background:var(--ink);color:#d8e3dd;padding:62px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:50px;padding-bottom:45px}
    .footer-brand .brand{color:#fff;margin-bottom:17px}
    .footer-brand p{max-width:380px;color:#abc1b6;font-size:14px;margin:0}
    .footer-title{font-size:15px;color:#fff;margin:4px 0 15px}
    .footer-links{display:grid;gap:8px}
    .footer-links a{color:#abc1b6;font-size:14px;transition:.2s}
    .footer-links a:hover{color:#f2b07d;transform:translateX(3px)}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding-top:19px;display:flex;justify-content:space-between;gap:20px;color:#8eaaa0;font-size:12px}
    @media(max-width:1023px){
      .nav-list a{padding:9px 7px;font-size:13px}
      .header-action{display:none}
      .route{grid-template-columns:repeat(3,1fr)}
      .guide-grid,.login-layout,.safety-layout{grid-template-columns:1fr}
    }
    @media(max-width:767px){
      .container{width:min(var(--max),calc(100% - 32px))}
      .nav-wrap{height:68px}
      .menu-toggle{display:block}
      .nav-list{display:none;position:absolute;left:16px;right:16px;top:76px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-lg);flex-direction:column;align-items:stretch}
      .nav-list.open{display:flex}
      .nav-list a{display:block;padding:12px 14px}
      .page-band{padding:42px 0}
      .page-band-inner{align-items:flex-start}
      .band-mark{width:58px;height:58px;border-radius:17px;font-size:19px}
      h1{font-size:34px}
      .section{padding:58px 0}
      .section-head{display:block;margin-bottom:25px}
      .section-head .lead{margin-top:10px}
      .route,.guide-list,.demo-grid,.safety-points,.help-grid{grid-template-columns:1fr}
      .guide-feature{min-height:260px;padding:25px}
      .qa-row{grid-template-columns:1fr;gap:4px}
      .support-wrap{display:block;padding:25px}
      .support-wrap .btn{margin-top:18px;width:100%}
      .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
      .footer-bottom{display:block;line-height:2}
      .footer-bottom span{display:block}
    }