/* roulang page: index */
:root{
      --green:#185b50;--green-deep:#103f3a;--green-soft:#e6f0eb;--mint:#f3f7f3;
      --sand:#f5f0e8;--cream:#fcfbf7;--ink:#19302d;--muted:#6b7b77;
      --orange:#df8b4b;--orange-dark:#bc6d35;--line:#dce6df;--card:#fff;
      --radius:18px;--radius-lg:28px;--shadow:0 14px 38px rgba(23,62,53,.09);
      --max:1180px;--space:96px;
    }
    *,*:before,*:after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{max-width:100%;display:block}
    .container{max-width:var(--max)}
    .topline{background:var(--green-deep);color:#dcebe4;font-size:13px}
    .topline .container{height:40px;display:flex;align-items:center;justify-content:space-between}
    .topline a:hover{color:#fff}
    .main-nav{background:rgba(252,251,247,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
    .navbar{min-height:76px}
    .brand{font-weight:800;font-size:20px;letter-spacing:.02em;color:var(--green-deep);white-space:nowrap}
    .brand span{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.16em;line-height:1.2}
    .nav-link{font-size:14px;font-weight:650;color:#53645f!important;padding:12px 13px!important;border-bottom:2px solid transparent}
    .nav-link:hover,.nav-link.active{color:var(--green)!important;border-color:var(--orange)}
    .nav-cta,.btn-main{background:var(--green);color:#fff;border:1px solid var(--green);border-radius:10px;padding:11px 18px;font-size:14px;font-weight:700}
    .nav-cta:hover,.btn-main:hover{background:var(--green-deep);color:#fff;transform:translateY(-2px)}
    .btn-lightline{border:1px solid rgba(255,255,255,.55);color:#fff;border-radius:10px;padding:11px 18px;font-weight:700}
    .btn-lightline:hover{background:#fff;color:var(--green-deep)}
    .btn-main:focus,.btn-lightline:focus,.nav-cta:focus,.form-control:focus,.form-select:focus{box-shadow:0 0 0 4px rgba(223,139,75,.22);outline:none}
    .hero{min-height:600px;position:relative;background:var(--green-deep);color:#fff;overflow:hidden}
    .hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,51,46,.96) 8%,rgba(11,51,46,.76) 48%,rgba(11,51,46,.2)),url("/assets/images/backpic/back-1.webp") center/cover}
    .hero .container{position:relative;z-index:1}
    .hero-content{padding:94px 0 70px;max-width:720px}
    .eyebrow,.section-kicker{font-size:12px;letter-spacing:.18em;color:var(--orange);font-weight:800;text-transform:uppercase}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.16;letter-spacing:-.045em;margin:18px 0 22px;font-weight:800}
    .hero-copy{font-size:17px;color:#e0eee8;max-width:660px;margin-bottom:30px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .version-strip{display:flex;gap:0;margin-top:66px;border-top:1px solid rgba(255,255,255,.24);padding-top:22px;max-width:780px}
    .version{flex:1;border-left:1px solid rgba(255,255,255,.24);padding:0 18px}
    .version:first-child{border:0;padding-left:0}
    .version b{display:block;color:#fff;font-size:17px}.version small{color:#a8c4b9}
    .section{padding:var(--space) 0}.section-sand{background:var(--sand)}.section-mint{background:var(--mint)}
    .section-head{max-width:700px;margin-bottom:42px}.section-head h2{font-size:clamp(28px,3vw,43px);line-height:1.25;margin:10px 0 16px;letter-spacing:-.035em}.section-head p{color:var(--muted);margin:0}
    .pain-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:stretch}
    .pain-panel{background:var(--green);color:#fff;border-radius:var(--radius-lg);padding:42px;position:relative;overflow:hidden}
    .pain-panel:after{content:"03";position:absolute;right:24px;bottom:-28px;font-size:150px;font-weight:800;color:rgba(255,255,255,.08)}
    .pain-panel h3{font-size:28px;line-height:1.35;max-width:420px}.pain-panel p{color:#d6e7df}
    .issue-list{display:grid;gap:12px}.issue{background:#fff;border:1px solid var(--line);border-radius:14px;padding:19px 22px;display:flex;gap:16px;align-items:flex-start}.issue strong{font-size:16px}.issue span{color:var(--muted);font-size:14px;display:block}
    .solution-layout{display:grid;grid-template-columns:270px 1fr;gap:45px}.solution-menu{border-left:2px solid var(--line)}.solution-menu a{display:block;padding:15px 20px;border-left:2px solid transparent;margin-left:-2px;color:var(--muted)}.solution-menu a:hover,.solution-menu a.active{color:var(--green);border-color:var(--orange);background:var(--green-soft)}
    .solution-body{display:grid;grid-template-columns:1fr 1fr;gap:18px}.feature-card{background:var(--card);border:1px solid var(--line);padding:26px;border-radius:var(--radius);min-height:190px;transition:.25s}.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b6d2c4}.feature-card img{height:130px;width:100%;object-fit:cover;border-radius:12px;margin-bottom:18px}.feature-card h3{font-size:20px;margin:0 0 8px}.feature-card p{font-size:14px;color:var(--muted);margin:0}.tag{display:inline-block;font-size:12px;color:var(--green);background:var(--green-soft);border-radius:6px;padding:3px 9px;margin-bottom:14px;font-weight:700}
    .scene-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:22px}.scene-large,.scene-small{position:relative;min-height:310px;border-radius:var(--radius-lg);overflow:hidden;color:#fff}.scene-small{min-height:145px}.scene-large img,.scene-small img{width:100%;height:100%;object-fit:cover}.scene-large:after,.scene-small:after{content:"";position:absolute;inset:35% 0 0;background:linear-gradient(transparent,rgba(8,35,31,.9))}.scene-text{position:absolute;z-index:1;bottom:25px;left:28px;right:25px}.scene-text h3{font-size:24px;margin:0 0 5px}.scene-text p{font-size:14px;color:#e4f0ea;margin:0}.scene-side{display:grid;gap:22px}
    .trust-band{background:var(--green-deep);color:#fff;padding:34px 0}.trust-items{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.trust-item{border-left:1px solid rgba(255,255,255,.25);padding-left:20px}.trust-item b{font-size:30px;display:block;color:#f0bd75;line-height:1.2}.trust-item span{font-size:13px;color:#bdd0c7}
    .proof{display:grid;grid-template-columns:1fr 1fr;gap:28px}.quote{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:34px}.quote p{font-size:19px;line-height:1.7;margin:0 0 24px}.quote footer{color:var(--muted);font-size:13px}.proof-note{background:var(--green-soft);border-radius:var(--radius-lg);padding:34px}.proof-note h3{margin-top:0}.proof-note li{margin:12px 0}
    .news-layout{display:grid;grid-template-columns:1fr 330px;gap:42px}.news-list{border-top:1px solid var(--line)}.news-row{display:flex;justify-content:space-between;gap:20px;padding:21px 0;border-bottom:1px solid var(--line)}.news-row h3{font-size:17px;margin:0 0 4px}.news-row p{font-size:14px;color:var(--muted);margin:0}.news-row time{font-size:13px;color:var(--muted);white-space:nowrap}.news-feature{background:var(--green);color:#fff;border-radius:var(--radius);padding:28px}.news-feature img{height:145px;width:100%;object-fit:cover;border-radius:12px;margin-bottom:20px}.news-feature p{color:#c9ded5;font-size:14px}
    .plans{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch}.plan{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px}.plan.featured{background:var(--green);color:#fff;transform:translateY(-12px);box-shadow:var(--shadow)}.plan h3{font-size:22px}.plan p{font-size:14px;color:var(--muted);min-height:52px}.featured p{color:#cce0d7}.plan ul{padding:0;list-style:none;border-top:1px solid var(--line);margin-top:25px;padding-top:18px}.featured ul{border-color:rgba(255,255,255,.22)}.plan li{padding:7px 0;font-size:14px}.plan li:before{content:"✓";color:var(--orange);font-weight:bold;margin-right:9px}
    .faq-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:48px}.accordion-item{border:1px solid var(--line)!important;border-radius:12px!important;margin-bottom:10px;overflow:hidden;background:#fff}.accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:20px}.accordion-button:not(.collapsed){color:var(--green);background:var(--green-soft);box-shadow:none}.accordion-body{font-size:14px;color:var(--muted);padding:0 20px 20px}
    .contact-section{background:var(--sand)}.contact-box{display:grid;grid-template-columns:.8fr 1.2fr;gap:55px;background:var(--green-deep);color:#fff;border-radius:var(--radius-lg);padding:48px}.contact-box p{color:#c7dad1}.form-label{font-size:13px;color:#d9e8e1;margin-bottom:6px}.form-control,.form-select{background:#fff;border:0;border-radius:9px;padding:12px 14px;min-height:48px}.form-control:invalid:not(:placeholder-shown){border:2px solid #e89476}.form-note{font-size:12px;color:#a9c4b8}.form-status{display:none;background:#e5f2e9;color:#185b50;padding:11px;border-radius:8px;margin-top:12px;font-size:14px}
    footer{background:#0e2e2a;color:#c4d8ce;padding:58px 0 22px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}.footer-brand{color:#fff;font-size:21px;font-weight:800}.footer-title{font-weight:700;color:#fff;margin-bottom:14px}.footer-links{list-style:none;padding:0;margin:0}.footer-links li{margin:7px 0;font-size:14px}.footer-links a:hover{color:#f0bd75}.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
    @media(max-width:991px){.nav-link{padding:10px 8px!important}.pain-grid,.solution-layout,.news-layout,.faq-layout,.contact-box{grid-template-columns:1fr}.solution-menu{display:flex;overflow:auto;border-left:0;border-bottom:2px solid var(--line);margin-bottom:20px}.solution-menu a{white-space:nowrap;border-left:0;border-bottom:2px solid transparent;margin:0}.solution-menu a.active{border-bottom-color:var(--orange)}.contact-box{gap:25px}.footer-grid{grid-template-columns:repeat(2,1fr)}}
    @media(max-width:767px){:root{--space:64px}.topline{display:none}.navbar{min-height:68px}.brand{font-size:17px}.nav-cta{display:none}.hero{min-height:620px}.hero-content{padding:70px 0 45px}.hero-copy{font-size:15px}.version-strip{margin-top:45px;display:grid;grid-template-columns:1fr 1fr;gap:15px}.version:last-child{grid-column:1/-1}.version{border-left:0;padding:0}.solution-body,.proof,.plans{grid-template-columns:1fr}.plan.featured{transform:none}.trust-items{grid-template-columns:repeat(2,1fr);gap:25px}.scene-grid{grid-template-columns:1fr}.scene-large{min-height:280px}.news-row{display:block}.news-row time{display:block;margin-top:8px}.contact-box{padding:30px 22px}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.copyright{display:block}.copyright span{display:block;margin-top:8px}}
    @media(max-width:420px){.container{padding-left:18px;padding-right:18px}h1{font-size:36px}.hero-actions .btn-main,.hero-actions .btn-lightline{width:100%;text-align:center}.footer-grid{grid-template-columns:1fr}.section-head h2{font-size:29px}.pain-panel{padding:28px 24px}}

/* roulang page: category1 */
:root{
      --green:#185b50;
      --green-deep:#103f3a;
      --green-soft:#e6f0eb;
      --mint:#f3f7f3;
      --sand:#f5f0e8;
      --cream:#fcfbf7;
      --ink:#19302d;
      --muted:#6b7b77;
      --orange:#df8b4b;
      --orange-dark:#bc6d35;
      --line:#dce6df;
      --card:#fff;
      --radius:18px;
      --radius-lg:28px;
      --shadow:0 14px 38px rgba(23,62,53,.09);
      --max:1180px;
      --space:64px
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{display:block;max-width:100%}
    .container{max-width:var(--max)}
    .topline{background:var(--green-deep);color:#c9ded5;font-size:12px}
    .topline .container{height:40px;display:flex;align-items:center;justify-content:space-between}
    .topline a:hover{color:#fff}
    .main-nav{background:rgba(252,251,247,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
    .navbar{min-height:76px}
    .brand{font-weight:800;font-size:20px;letter-spacing:.02em;color:var(--green-deep);white-space:nowrap}
    .brand span{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.12em;line-height:1.2}
    .nav-link{font-size:14px;font-weight:650;color:#53645f!important;padding:12px 13px!important;border-bottom:2px solid transparent}
    .nav-link:hover,.nav-link.active{color:var(--green)!important;border-color:var(--orange)}
    .nav-cta,.btn-main{background:var(--green);color:#fff;border:1px solid var(--green);border-radius:10px;padding:11px 18px;font-size:14px;font-weight:700;display:inline-block}
    .nav-cta:hover,.btn-main:hover{background:var(--green-deep);color:#fff;transform:translateY(-2px)}
    .btn-outline{border:1px solid var(--green);color:var(--green);border-radius:10px;padding:10px 18px;font-size:14px;font-weight:700;display:inline-block}
    .btn-outline:hover{background:var(--green);color:#fff}
    .btn-main:focus,.btn-outline:focus,.nav-cta:focus,.form-control:focus,.form-select:focus,.accordion-button:focus{box-shadow:0 0 0 4px rgba(223,139,75,.22);outline:none}
    .navbar-toggler{padding:10px;border:1px solid var(--line)!important;border-radius:9px}
    .navbar-toggler:focus{box-shadow:0 0 0 3px rgba(223,139,75,.2)}
    .navbar-toggler-icon{background-image:none!important;width:22px;height:16px;position:relative;border-top:2px solid var(--green);border-bottom:2px solid var(--green)}
    .navbar-toggler-icon:after{content:"";position:absolute;left:0;right:0;top:5px;border-top:2px solid var(--green)}
    .page-hero{position:relative;overflow:hidden;background:var(--green-deep);color:#fff;padding:82px 0 76px}
    .page-hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(16,63,58,.98) 12%,rgba(16,63,58,.78) 57%,rgba(16,63,58,.35)),url("/assets/images/backpic/back-3.webp") center/cover}
    .page-hero .container{position:relative;z-index:1}
    .eyebrow,.section-kicker{font-size:12px;letter-spacing:.16em;color:var(--orange);font-weight:800}
    .page-hero h1{font-size:clamp(34px,5vw,60px);line-height:1.18;letter-spacing:-.04em;max-width:760px;margin:13px 0 20px}
    .hero-copy{font-size:17px;color:#dcebe4;max-width:680px;margin:0 0 28px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .btn-lightline{border:1px solid rgba(255,255,255,.6);color:#fff;border-radius:10px;padding:10px 18px;font-weight:700;display:inline-block}
    .btn-lightline:hover{background:#fff;color:var(--green-deep)}
    .route-strip{margin-top:52px;display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid rgba(255,255,255,.27);max-width:900px}
    .route-step{padding:18px 18px 0 0;border-right:1px solid rgba(255,255,255,.2);margin-right:18px}
    .route-step:last-child{border:0}
    .route-step b{display:block;color:#fff;font-size:15px}
    .route-step span{display:block;color:#acc6ba;font-size:12px;margin-top:4px}
    .section{padding:var(--space) 0}
    .section-sand{background:var(--sand)}
    .section-mint{background:var(--mint)}
    .section-head{max-width:720px;margin-bottom:38px}
    .section-head h2{font-size:clamp(28px,3vw,43px);line-height:1.25;margin:9px 0 15px;letter-spacing:-.035em}
    .section-head p{color:var(--muted);margin:0}
    .intro-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:42px;align-items:center}
    .intro-grid img{width:100%;height:370px;object-fit:cover;border-radius:var(--radius-lg)}
    .intro-note{border-left:3px solid var(--orange);padding-left:20px;color:var(--muted);font-size:15px}
    .proof-row{display:flex;gap:22px;flex-wrap:wrap;margin-top:25px}
    .proof{background:var(--green-soft);padding:13px 16px;border-radius:10px;font-size:13px;color:var(--green);font-weight:700}
    .solution-list{display:grid;gap:14px}
    .solution-item{display:grid;grid-template-columns:76px 1fr auto;gap:24px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;transition:.25s}
    .solution-item:hover{border-color:#a9cbbb;box-shadow:var(--shadow);transform:translateX(4px)}
    .solution-no{font-size:30px;line-height:1;color:var(--orange);font-weight:800}
    .solution-item h3{font-size:21px;margin:0 0 6px}
    .solution-item p{font-size:14px;color:var(--muted);margin:0;max-width:700px}
    .item-label{font-size:12px;color:var(--green);background:var(--green-soft);padding:5px 10px;border-radius:6px;white-space:nowrap;font-weight:700}
    .scene-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px}
    .scene-panel{position:relative;min-height:270px;border-radius:var(--radius);overflow:hidden;color:#fff;background:var(--green-deep)}
    .scene-panel img{width:100%;height:100%;object-fit:cover;opacity:.72}
    .scene-panel:after{content:"";position:absolute;inset:35% 0 0;background:linear-gradient(transparent,rgba(10,39,35,.94))}
    .scene-content{position:absolute;z-index:1;left:26px;right:26px;bottom:22px}
    .scene-content h3{font-size:22px;margin:0 0 5px}
    .scene-content p{font-size:14px;color:#d9e8e1;margin:0}
    .scene-side{display:grid;gap:22px}
    .scene-side .scene-panel{min-height:124px}
    .scene-side .scene-content{bottom:15px;left:20px}
    .scene-side h3{font-size:18px}
    .compare-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:auto}
    .compare-table{width:100%;min-width:650px;border-collapse:collapse}
    .compare-table th,.compare-table td{text-align:left;padding:18px 21px;border-bottom:1px solid var(--line);font-size:14px}
    .compare-table th{background:var(--green);color:#fff;font-weight:700}
    .compare-table tr:last-child td{border-bottom:0}
    .compare-table td:first-child{font-weight:700;color:var(--green)}
    .check{color:var(--green);font-weight:800}
    .timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid var(--green);margin-top:16px}
    .timeline-item{position:relative;padding:27px 18px 0 0}
    .timeline-item:before{content:"";position:absolute;width:13px;height:13px;background:var(--orange);border:3px solid var(--cream);border-radius:50%;top:-8px;left:0}
    .timeline-item:not(:last-child){border-right:1px solid var(--line);margin-right:18px}
    .timeline-item b{display:block;font-size:17px;margin-bottom:8px}
    .timeline-item p{font-size:13px;color:var(--muted);margin:0;padding-right:12px}
    .faq-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:48px}
    .accordion-item{border:1px solid var(--line)!important;border-radius:12px!important;margin-bottom:10px;overflow:hidden;background:#fff}
    .accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:19px}
    .accordion-button:not(.collapsed){color:var(--green);background:var(--green-soft);box-shadow:none}
    .accordion-body{font-size:14px;color:var(--muted);padding:0 20px 20px}
    .contact-section{background:var(--green-deep);color:#fff}
    .contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:55px;align-items:start}
    .contact-grid h2{font-size:clamp(28px,3vw,42px);line-height:1.25;margin:10px 0 17px}
    .contact-grid p{color:#c9ded5}
    .contact-points{list-style:none;padding:0;margin:25px 0 0}
    .contact-points li{padding:10px 0;border-bottom:1px solid rgba(255,255,255,.15);font-size:14px;color:#d3e4dd}
    .form-label{font-size:13px;color:#d9e8e1;margin-bottom:6px}
    .form-control,.form-select{background:#fff;border:0;border-radius:9px;padding:12px 14px;min-height:48px}
    textarea.form-control{min-height:112px}
    .form-note{font-size:12px;color:#a9c4b8}
    .form-status{display:none;background:#e5f2e9;color:var(--green);padding:11px;border-radius:8px;margin-top:12px;font-size:14px}
    footer{background:#0e2e2a;color:#c4d8ce;padding:58px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}
    .footer-brand{color:#fff;font-size:21px;font-weight:800}
    .footer-title{font-weight:700;color:#fff;margin-bottom:14px}
    .footer-links{list-style:none;padding:0;margin:0}
    .footer-links li{margin:7px 0;font-size:14px}
    .footer-links a:hover{color:#f0bd75}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
    @media(max-width:991px){
      .navbar-collapse{padding:16px 0 8px}
      .nav-link{padding:10px 0!important}
      .route-strip{grid-template-columns:repeat(2,1fr);row-gap:12px}
      .route-step{border-right:0;margin-right:0}
      .intro-grid,.contact-grid{grid-template-columns:1fr;gap:28px}
      .scene-grid{grid-template-columns:1fr}
      .scene-side{grid-template-columns:1fr 1fr}
      .faq-layout{grid-template-columns:1fr;gap:25px}
    }
    @media(max-width:767px){
      :root{--space:48px}
      .topline .container{height:36px}
      .topline .container span:last-child{display:none}
      .brand{font-size:17px}
      .page-hero{padding:60px 0 48px}
      .page-hero h1{font-size:36px}
      .hero-copy{font-size:15px}
      .route-strip{margin-top:38px}
      .solution-item{grid-template-columns:48px 1fr;gap:14px;padding:19px}
      .solution-item .item-label{grid-column:2;justify-self:start}
      .solution-no{font-size:25px}
      .timeline{display:block;border-top:0;border-left:2px solid var(--green);margin-left:8px}
      .timeline-item{padding:0 0 25px 25px}
      .timeline-item:before{left:-8px;top:3px}
      .timeline-item:not(:last-child){border-right:0;margin-right:0}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
    }
    @media(max-width:520px){
      .hero-actions a{width:100%;text-align:center}
      .intro-grid img{height:260px}
      .scene-side{grid-template-columns:1fr}
      .scene-side .scene-panel{min-height:180px}
      .footer-grid{grid-template-columns:1fr}
      .copyright{display:block}
      .copyright span{display:block;margin-bottom:8px}
    }

/* roulang page: category2 */
:root{
 --green:#185b50;--green-deep:#103f3a;--green-soft:#e6f0eb;--mint:#f3f7f3;
 --sand:#f5f0e8;--cream:#fcfbf7;--ink:#19302d;--muted:#6b7b77;
 --orange:#df8b4b;--orange-dark:#bc6d35;--line:#dce6df;--card:#fff;
 --radius:18px;--radius-lg:28px;--shadow:0 14px 38px rgba(23,62,53,.09);
 --max:1180px;--space:92px
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--cream);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75}
a{color:inherit;text-decoration:none;transition:.25s ease}
img{max-width:100%;display:block}
.container{max-width:var(--max)}
.topline{background:var(--green-deep);color:#c8dcd3;font-size:12px}
.topline .container{height:40px;display:flex;align-items:center;justify-content:space-between}
.topline a:hover{color:#fff}
.main-nav{background:rgba(252,251,247,.98);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.navbar{min-height:76px}
.brand{font-weight:800;font-size:20px;letter-spacing:.02em;color:var(--green-deep);white-space:nowrap}
.brand span{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.12em;line-height:1.2}
.navbar-toggler{padding:10px;border-radius:9px}
.navbar-toggler:focus{box-shadow:0 0 0 4px rgba(223,139,75,.2)}
.navbar-toggler-icon{width:1.35em;height:1.35em}
.nav-link{font-size:14px;font-weight:650;color:#53645f!important;padding:12px 13px!important;border-bottom:2px solid transparent}
.nav-link:hover,.nav-link.active{color:var(--green)!important;border-color:var(--orange)}
.nav-cta,.btn-main{background:var(--green);color:#fff;border:1px solid var(--green);border-radius:10px;padding:11px 18px;font-size:14px;font-weight:700;display:inline-block}
.nav-cta:hover,.btn-main:hover{background:var(--green-deep);color:#fff;transform:translateY(-2px)}
.btn-outline{border:1px solid var(--green);color:var(--green);border-radius:10px;padding:11px 18px;font-weight:700;display:inline-block}
.btn-outline:hover{background:var(--green);color:#fff}
.btn-main:focus,.btn-outline:focus,.nav-cta:focus,.form-control:focus,.form-select:focus,.accordion-button:focus{box-shadow:0 0 0 4px rgba(223,139,75,.22);outline:none}
.page-hero{padding:76px 0 84px;background:var(--green-soft);position:relative;overflow:hidden}
.page-hero:after{content:"";position:absolute;width:410px;height:410px;border:1px solid rgba(24,91,80,.15);border-radius:50%;right:-120px;top:-120px}
.eyebrow,.section-kicker{font-size:12px;letter-spacing:.16em;color:var(--orange-dark);font-weight:800}
.page-hero h1{font-size:clamp(35px,5vw,62px);line-height:1.18;letter-spacing:-.045em;margin:12px 0 20px;max-width:700px}
.hero-copy{font-size:17px;color:#526a63;max-width:680px;margin-bottom:28px}
.hero-layout{display:grid;grid-template-columns:1fr .83fr;gap:55px;align-items:center;position:relative;z-index:1}
.architecture-preview{background:var(--green-deep);color:#fff;border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow)}
.architecture-preview img{height:210px;width:100%;object-fit:cover;border-radius:13px;opacity:.78;margin-bottom:18px}
.architecture-preview h2{font-size:20px;margin:0 0 16px}
.arch-layer{display:flex;align-items:center;gap:10px;border:1px solid rgba(255,255,255,.18);padding:11px 13px;border-radius:9px;margin-top:9px;font-size:13px;color:#d9e8e1}
.arch-layer b{color:#f0bd75;font-size:16px}
.section{padding:var(--space) 0}
.section-sand{background:var(--sand)}
.section-mint{background:var(--mint)}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{font-size:clamp(28px,3vw,43px);line-height:1.25;margin:10px 0 15px;letter-spacing:-.035em}
.section-head p{color:var(--muted);margin:0}
.module-layout{display:grid;grid-template-columns:.65fr 1.35fr;gap:30px;align-items:start}
.module-menu{border-left:2px solid var(--line)}
.module-menu a{display:block;padding:16px 20px;border-left:2px solid transparent;margin-left:-2px;color:var(--muted)}
.module-menu a:hover,.module-menu a.active{color:var(--green);border-color:var(--orange);background:var(--green-soft)}
.module-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.module-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:25px;min-height:200px;transition:.25s}
.module-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b6d2c4}
.module-card img{width:100%;height:106px;object-fit:cover;border-radius:11px;margin-bottom:17px}
.tag{display:inline-block;font-size:12px;color:var(--green);background:var(--green-soft);border-radius:6px;padding:3px 9px;margin-bottom:12px;font-weight:700}
.module-card h3{font-size:19px;margin:0 0 7px}
.module-card p{font-size:14px;color:var(--muted);margin:0}
.scene-band{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:stretch}
.scene-image{min-height:350px;border-radius:var(--radius-lg);overflow:hidden}
.scene-image img{width:100%;height:100%;object-fit:cover}
.scene-copy{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:35px}
.scene-copy h3{font-size:26px;margin:10px 0 15px}
.scene-copy p{color:var(--muted);font-size:15px}
.scene-points{list-style:none;padding:0;margin:24px 0 0}
.scene-points li{border-top:1px solid var(--line);padding:12px 0;font-size:14px}
.scene-points li:before{content:"＋";color:var(--orange-dark);font-weight:800;margin-right:9px}
.parameter-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.parameter-panel{border:1px solid var(--line);background:#fff;border-radius:var(--radius);padding:28px}
.parameter-panel h3{font-size:20px;margin:0 0 18px}
.parameter-row{display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding:13px 0;font-size:14px}
.parameter-row:last-child{border-bottom:0}
.parameter-row span{color:var(--muted)}
.parameter-row strong{color:var(--green);text-align:right}
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
.process:before{content:"";position:absolute;top:27px;left:10%;right:10%;height:1px;background:#b9cec4}
.process-step{position:relative;text-align:center;padding:0 16px}
.process-num{width:55px;height:55px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--orange);color:#fff;font-weight:800;margin:0 auto 20px;position:relative;border:7px solid var(--cream)}
.process-step h3{font-size:17px;margin:0 0 8px}
.process-step p{font-size:13px;color:var(--muted);margin:0}
.dark-section{background:var(--green-deep);color:#fff}
.dark-section .section-head p{color:#bdd0c7}
.security-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:55px;align-items:center}
.security-layout img{height:345px;width:100%;object-fit:cover;border-radius:var(--radius-lg)}
.security-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.security-item{border:1px solid rgba(255,255,255,.18);border-radius:12px;padding:19px}
.security-item b{display:block;color:#f0bd75;margin-bottom:5px}
.security-item span{font-size:13px;color:#c5d9d0}
.faq-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:50px}
.accordion-item{border:1px solid var(--line)!important;border-radius:12px!important;margin-bottom:10px;overflow:hidden;background:#fff}
.accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:19px}
.accordion-button:not(.collapsed){color:var(--green);background:var(--green-soft);box-shadow:none}
.accordion-body{font-size:14px;color:var(--muted);padding:0 20px 20px}
.contact-section{background:var(--sand)}
.contact-box{background:var(--green);border-radius:var(--radius-lg);padding:38px;color:#fff}
.contact-box h2{font-size:30px;line-height:1.3;margin:0 0 13px}
.contact-box p{color:#cce0d7;font-size:14px}
.form-label{font-size:13px;color:#d9e8e1;margin-bottom:6px}
.form-control,.form-select{background:#fff;border:0;border-radius:9px;padding:12px 14px;min-height:48px}
.form-control:focus,.form-select:focus{border-color:var(--orange)}
.form-note{font-size:12px;color:#a9c4b8;margin:12px 0 0}
.form-status{display:none;background:#e5f2e9;color:var(--green);padding:11px;border-radius:8px;margin-top:12px;font-size:14px}
footer{background:#0e2e2a;color:#c4d8ce;padding:58px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}
.footer-brand{color:#fff;font-size:21px;font-weight:800}
.footer-title{font-weight:700;color:#fff;margin-bottom:14px}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin:7px 0;font-size:14px}
.footer-links a:hover{color:#f0bd75}
.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
@media(max-width:991px){
 .hero-layout,.security-layout,.scene-band{grid-template-columns:1fr;gap:28px}
 .navbar-collapse{padding:12px 0 18px}
 .nav-cta{margin-top:8px}
 .module-layout{grid-template-columns:1fr}
 .process{grid-template-columns:repeat(2,1fr);gap:28px}
 .process:before{display:none}
 .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:575px){
 :root{--space:64px}
 .topline .container{height:35px;font-size:11px}
 .topline span:last-child{display:none}
 .brand{font-size:17px}
 .brand span{font-size:9px}
 .page-hero{padding:55px 0 60px}
 .page-hero h1{font-size:36px}
 .hero-copy{font-size:15px}
 .hero-actions{display:grid;grid-template-columns:1fr}
 .hero-actions a{text-align:center}
 .architecture-preview{padding:18px}
 .architecture-preview img{height:160px}
 .module-list,.parameter-grid,.security-list{grid-template-columns:1fr}
 .module-card{min-height:0}
 .scene-copy{padding:25px}
 .scene-image{min-height:230px}
 .process{grid-template-columns:1fr;text-align:left}
 .process-step{text-align:left;padding:0 0 0 75px;min-height:78px}
 .process-num{position:absolute;left:0;top:0;margin:0;width:52px;height:52px}
 .footer-grid{grid-template-columns:1fr;gap:25px}
 .copyright{display:block}
 .copyright span{display:block;margin-bottom:8px}
}

/* roulang page: category4 */
:root{
            --green:#185b50;--green-deep:#103f3a;--green-soft:#e6f0eb;--mint:#f3f7f3;
            --sand:#f5f0e8;--cream:#fcfbf7;--ink:#19302d;--muted:#6b7b77;
            --orange:#df8b4b;--orange-dark:#bc6d35;--line:#dce6df;--card:#fff;
            --radius:18px;--radius-lg:28px;--shadow:0 14px 38px rgba(23,62,53,.09);
            --max:1180px;--space:84px
        }
        *,*::before,*::after{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;background:var(--cream);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75}
        a{color:inherit;text-decoration:none;transition:.25s ease}
        img{display:block;max-width:100%}
        .container{max-width:var(--max)}
        .topline{background:var(--green-deep);color:#c9ddd4;font-size:12px}
        .topline .container{height:40px;display:flex;align-items:center;justify-content:space-between}
        .topline a:hover{color:#fff}
        .main-nav{position:sticky;top:0;z-index:20;background:rgba(252,251,247,.98);border-bottom:1px solid var(--line)}
        .navbar{min-height:76px}
        .brand{font-size:20px;font-weight:800;line-height:1.2;letter-spacing:.01em;color:var(--green-deep);white-space:nowrap}
        .brand span{display:block;color:var(--muted);font-size:11px;font-weight:500;letter-spacing:.12em;line-height:1.35}
        .nav-link{padding:12px 13px!important;border-bottom:2px solid transparent;color:#53645f!important;font-size:14px;font-weight:650}
        .nav-link:hover,.nav-link.active{color:var(--green)!important;border-color:var(--orange)}
        .nav-cta,.btn-main{display:inline-block;border:1px solid var(--green);border-radius:10px;background:var(--green);color:#fff;padding:11px 18px;font-size:14px;font-weight:700}
        .nav-cta:hover,.btn-main:hover{background:var(--green-deep);color:#fff;transform:translateY(-2px)}
        .btn-outline{display:inline-block;border:1px solid var(--green);border-radius:10px;color:var(--green);padding:11px 18px;font-size:14px;font-weight:700}
        .btn-outline:hover{background:var(--green);color:#fff}
        .btn-lightline{display:inline-block;border:1px solid rgba(255,255,255,.55);border-radius:10px;color:#fff;padding:11px 18px;font-weight:700}
        .btn-lightline:hover{background:#fff;color:var(--green-deep)}
        .btn-main:focus,.btn-outline:focus,.btn-lightline:focus,.nav-cta:focus,.form-control:focus,.form-select:focus,.accordion-button:focus{outline:0;box-shadow:0 0 0 4px rgba(223,139,75,.24)}
        .page-banner{position:relative;overflow:hidden;background:var(--green-deep);color:#fff;padding:78px 0 76px}
        .page-banner:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,51,46,.98),rgba(11,51,46,.8)),url("/assets/images/backpic/back-4.webp") center/cover}
        .page-banner .container{position:relative;z-index:1}
        .banner-grid{display:grid;grid-template-columns:1fr .9fr;gap:54px;align-items:center}
        .eyebrow,.section-kicker{color:var(--orange);font-size:12px;font-weight:800;letter-spacing:.16em}
        .page-banner h1{max-width:650px;margin:12px 0 18px;font-size:clamp(34px,5vw,62px);line-height:1.2;letter-spacing:-.045em}
        .banner-copy{max-width:620px;margin:0 0 28px;color:#d7e8e0;font-size:17px}
        .banner-actions{display:flex;flex-wrap:wrap;gap:12px}
        .risk-board{padding:25px;border:1px solid rgba(255,255,255,.2);border-radius:var(--radius-lg);background:rgba(8,43,38,.78)}
        .risk-board-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;color:#e3eee9;font-size:14px;font-weight:700}
        .status{color:#f0bd75;font-size:12px}
        .risk-item{padding:15px 0;border-top:1px solid rgba(255,255,255,.16)}
        .risk-item:first-of-type{border-top:0}
        .risk-line{display:flex;justify-content:space-between;gap:18px;font-size:13px;color:#c6d9d1}
        .risk-line strong{color:#fff;font-size:18px}
        .meter{height:6px;margin-top:10px;border-radius:6px;background:rgba(255,255,255,.14);overflow:hidden}
        .meter i{display:block;height:100%;border-radius:6px;background:var(--orange)}
        .section{padding:var(--space) 0}
        .section-sand{background:var(--sand)}
        .section-mint{background:var(--mint)}
        .section-head{max-width:720px;margin-bottom:40px}
        .section-head h2{margin:10px 0 14px;font-size:clamp(28px,3.5vw,44px);line-height:1.28;letter-spacing:-.035em}
        .section-head p{margin:0;color:var(--muted)}
        .test-list{display:grid;gap:14px}
        .test-row{display:grid;grid-template-columns:78px 1fr 180px;gap:24px;align-items:center;padding:25px 28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:.25s}
        .test-row:hover{border-color:#a9c9ba;box-shadow:var(--shadow);transform:translateX(4px)}
        .test-no{color:var(--orange);font-size:30px;font-weight:800}
        .test-row h3{margin:0 0 5px;font-size:20px}
        .test-row p{margin:0;color:var(--muted);font-size:14px}
        .test-meta{border-left:1px solid var(--line);padding-left:20px;color:var(--green);font-size:13px;font-weight:700}
        .matrix{display:grid;grid-template-columns:1.1fr .9fr;gap:26px}
        .matrix-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
        .matrix-panel h3{margin:0 0 20px;font-size:21px}
        .matrix-item{display:flex;gap:15px;padding:15px 0;border-top:1px solid var(--line)}
        .matrix-item:first-child{border-top:0;padding-top:0}
        .matrix-mark{width:25px;height:25px;flex:none;border-radius:50%;background:var(--green-soft);color:var(--green);text-align:center;line-height:25px;font-weight:800}
        .matrix-item b{display:block;font-size:15px}
        .matrix-item span{display:block;color:var(--muted);font-size:13px}
        .method-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
        .method-card{padding:23px;background:var(--cream);border:1px solid var(--line);border-radius:14px}
        .method-card b{display:block;margin-bottom:8px;color:var(--green);font-size:17px}
        .method-card p{margin:0;color:var(--muted);font-size:13px}
        .method-card .tag{display:inline-block;margin-bottom:15px;padding:3px 8px;border-radius:5px;background:var(--green-soft);color:var(--green);font-size:11px;font-weight:700}
        .timeline{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:0}
        .timeline:before{content:"";position:absolute;top:16px;left:5%;right:5%;height:2px;background:#bfd4c9}
        .step{position:relative;padding:0 13px}
        .step-dot{position:relative;z-index:1;width:34px;height:34px;margin:0 auto 19px;border:8px solid var(--mint);border-radius:50%;background:var(--orange)}
        .step h3{text-align:center;font-size:16px;margin:0 0 7px}
        .step p{text-align:center;color:var(--muted);font-size:13px;margin:0}
        .evidence{display:grid;grid-template-columns:.85fr 1.15fr;gap:35px;align-items:center}
        .evidence-image{border-radius:var(--radius-lg);overflow:hidden}
        .evidence-image img{width:100%;height:330px;object-fit:cover}
        .evidence-copy h2{font-size:clamp(28px,3vw,40px);line-height:1.3;margin:10px 0 16px}
        .evidence-copy p{color:var(--muted)}
        .evidence-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:22px}
        .evidence-list div{padding:14px;background:#fff;border:1px solid var(--line);border-radius:10px;font-size:13px}
        .evidence-list b{display:block;color:var(--green);font-size:20px}
        .dark-section{background:#123f39;color:#fff}
        .dark-section .section-head p{color:#c5d9d0}
        .safe-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
        .safe-card{padding:28px;border:1px solid rgba(255,255,255,.18);border-radius:var(--radius);background:rgba(6,46,41,.5)}
        .safe-card h3{margin:0 0 10px;color:#f0bd75;font-size:20px}
        .safe-card p{margin:0;color:#c6dbd2;font-size:14px}
        .faq-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:52px}
        .accordion-item{margin-bottom:10px;border:1px solid var(--line)!important;border-radius:12px!important;overflow:hidden;background:#fff}
        .accordion-button{padding:19px 20px;background:#fff;color:var(--ink);font-weight:700}
        .accordion-button:not(.collapsed){background:var(--green-soft);color:var(--green);box-shadow:none}
        .accordion-body{padding:0 20px 20px;color:var(--muted);font-size:14px}
        .contact-section{background:var(--sand)}
        .contact-box{display:grid;grid-template-columns:.8fr 1.2fr;gap:46px;align-items:start}
        .contact-box h2{font-size:clamp(28px,3vw,42px);line-height:1.3;margin:10px 0 15px}
        .contact-box p{color:var(--muted)}
        .form-shell{padding:30px;border-radius:var(--radius-lg);background:var(--green-deep);color:#fff}
        .form-label{margin-bottom:6px;color:#d6e7df;font-size:13px}
        .form-control,.form-select{min-height:48px;border:0;border-radius:9px;padding:12px 14px}
        .form-note{margin:13px 0 0;color:#a9c4b8;font-size:12px}
        .form-status{display:none;margin-top:12px;padding:11px;border-radius:8px;background:#e5f2e9;color:var(--green);font-size:14px}
        footer{padding:58px 0 22px;background:#0e2e2a;color:#c4d8ce}
        .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}
        .footer-brand{color:#fff;font-size:21px;font-weight:800}
        .footer-title{margin-bottom:14px;color:#fff;font-weight:700}
        .footer-links{list-style:none;padding:0;margin:0}
        .footer-links li{margin:7px 0;font-size:14px}
        .footer-links a:hover{color:#f0bd75}
        .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:18px;font-size:12px}
        .copyright a:hover{color:#fff}
        @media(max-width:991px){
            .navbar{min-height:68px}.nav-cta{padding:10px 14px}
            .banner-grid,.matrix,.evidence,.contact-box{grid-template-columns:1fr}
            .page-banner{padding:62px 0}.risk-board{max-width:600px}
            .timeline{grid-template-columns:1fr;gap:24px}.timeline:before{top:16px;bottom:16px;left:16px;width:2px;height:auto;right:auto}
            .step{display:grid;grid-template-columns:34px 1fr;gap:15px;padding:0}.step-dot{margin:0}.step h3,.step p{text-align:left}
            .footer-grid{grid-template-columns:1fr 1fr}
        }
        @media(max-width:767px){
            :root{--space:62px}.topline{display:none}.brand{font-size:17px}.brand span{font-size:10px}
            .page-banner h1{font-size:38px}.banner-copy{font-size:15px}
            .test-row{grid-template-columns:45px 1fr;gap:15px;padding:20px}.test-meta{grid-column:2;border-left:0;padding-left:0}
            .method-grid{grid-template-columns:1fr 1fr}.safe-grid{grid-template-columns:1fr}
            .faq-layout{grid-template-columns:1fr;gap:25px}.copyright{display:block}.copyright span{display:block;margin-top:8px}
        }
        @media(max-width:520px){
            .container{padding-left:20px;padding-right:20px}.navbar{padding-top:10px;padding-bottom:10px}
            .page-banner{padding:50px 0 54px}.page-banner h1{font-size:32px}.risk-board{padding:20px}
            .method-grid,.evidence-list,.footer-grid{grid-template-columns:1fr}.section-head{margin-bottom:28px}
            .form-shell{padding:22px 18px}.btn-main,.btn-outline,.btn-lightline{width:100%;text-align:center}
        }

/* roulang page: category5 */
:root{--green:#185b50;--green-deep:#103f3a;--green-soft:#e6f0eb;--mint:#f3f7f3;--sand:#f5f0e8;--cream:#fcfbf7;--ink:#19302d;--muted:#6b7b77;--orange:#df8b4b;--orange-dark:#bc6d35;--line:#dce6df;--card:#fff;--radius:18px;--radius-lg:28px;--shadow:0 14px 38px rgba(23,62,53,.09);--max:1180px;--space:82px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--cream);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75}a{color:inherit;text-decoration:none;transition:.25s ease}img{max-width:100%;display:block}.container{max-width:var(--max)}
.topline{background:var(--green-deep);color:#cce0d7;font-size:12px}.topline .container{height:40px;display:flex;align-items:center;justify-content:space-between}.topline a:hover{color:#fff}
.main-nav{background:rgba(252,251,247,.98);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.navbar{min-height:76px}.brand{font-weight:800;font-size:20px;letter-spacing:.02em;color:var(--green-deep);white-space:nowrap}.brand span{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.12em;line-height:1.2}.nav-link{font-size:14px;font-weight:650;color:#53645f!important;padding:12px 12px!important;border-bottom:2px solid transparent}.nav-link:hover,.nav-link.active{color:var(--green)!important;border-color:var(--orange)}.nav-cta,.btn-main{background:var(--green);color:#fff;border:1px solid var(--green);border-radius:10px;padding:11px 18px;font-size:14px;font-weight:700}.nav-cta:hover,.btn-main:hover{background:var(--green-deep);color:#fff;transform:translateY(-2px)}.btn-outline{border:1px solid var(--green);color:var(--green);border-radius:10px;padding:11px 18px;font-weight:700}.btn-outline:hover{background:var(--green);color:#fff}.btn-main:focus,.btn-outline:focus,.nav-cta:focus,.form-control:focus,.form-select:focus,.accordion-button:focus{box-shadow:0 0 0 4px rgba(223,139,75,.22);outline:none}
.page-hero{background:var(--sand);padding:76px 0 72px;border-bottom:1px solid var(--line)}.eyebrow,.section-kicker{font-size:12px;letter-spacing:.16em;color:var(--orange-dark);font-weight:800}.page-hero h1{font-size:clamp(34px,5vw,62px);line-height:1.18;letter-spacing:-.04em;margin:12px 0 20px;color:var(--green-deep)}.page-hero p{font-size:17px;color:var(--muted);max-width:680px;margin-bottom:28px}
.cover{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:16px;box-shadow:var(--shadow);transform:rotate(1deg)}.cover img{width:100%;height:350px;object-fit:cover;border-radius:14px}.cover-label{padding:14px 6px 2px;font-weight:800;color:var(--green)}
.section{padding:var(--space) 0}.section-sand{background:var(--sand)}.section-mint{background:var(--mint)}.section-head{max-width:720px;margin-bottom:40px}.section-head h2{font-size:clamp(27px,3vw,42px);line-height:1.28;letter-spacing:-.035em;margin:9px 0 14px}.section-head p{color:var(--muted);margin:0}.data-list{border-top:1px solid var(--line)}.data-row{display:grid;grid-template-columns:70px 1fr 1.3fr auto;gap:22px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line)}.data-no{font-size:26px;font-weight:800;color:var(--orange)}.data-row h3{font-size:20px;margin:0}.data-row p{font-size:14px;color:var(--muted);margin:0}.tag{display:inline-block;font-size:12px;color:var(--green);background:var(--green-soft);border-radius:6px;padding:4px 9px;font-weight:700}
.scene-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:25px}.scene-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.scene-card img{height:205px;width:100%;object-fit:cover}.scene-card div{padding:22px}.scene-card h3{font-size:21px;margin:0 0 7px}.scene-card p{color:var(--muted);font-size:14px;margin:0}
.security{background:var(--green-deep);color:#fff}.security .section-head p{color:#bdd0c7}.security-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.security-item{border:1px solid rgba(255,255,255,.2);border-radius:14px;padding:22px;background:rgba(255,255,255,.04)}.security-item h3{font-size:18px;margin:0 0 7px;color:#f0bd75}.security-item p{font-size:14px;color:#c5d9d0;margin:0}
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}.step{position:relative;padding:25px 22px 15px 0;border-bottom:1px solid var(--line)}.step:not(:last-child){margin-right:24px}.step b{color:var(--orange);font-size:13px}.step h3{font-size:18px;margin:9px 0 5px}.step p{font-size:13px;color:var(--muted);margin:0}
.metric-band{background:var(--orange);color:var(--green-deep);padding:42px 0}.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.metric{border-left:1px solid rgba(16,63,58,.28);padding-left:20px}.metric strong{font-size:35px;line-height:1.1;display:block}.metric span{font-size:13px}
.faq-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:45px}.accordion-item{border:1px solid var(--line)!important;border-radius:12px!important;margin-bottom:10px;overflow:hidden;background:#fff}.accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:19px}.accordion-button:not(.collapsed){color:var(--green);background:var(--green-soft);box-shadow:none}.accordion-body{font-size:14px;color:var(--muted);padding:0 20px 20px}
.contact-section{background:var(--sand)}.contact-box{background:var(--green);color:#fff;border-radius:var(--radius-lg);padding:38px}.contact-box h2{font-size:32px;line-height:1.3;margin:0 0 12px}.contact-box p{color:#cce0d7}.form-label{font-size:13px;margin-bottom:6px}.form-control,.form-select{border:0;border-radius:9px;padding:12px 14px;min-height:48px}.form-control:focus,.form-select:focus{border-color:var(--orange)}.form-note{font-size:12px;color:#b9d1c6}.form-status{display:none;background:#e5f2e9;color:var(--green);padding:11px;border-radius:8px;margin-top:12px;font-size:14px}
footer{background:#0e2e2a;color:#c4d8ce;padding:58px 0 22px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}.footer-brand{color:#fff;font-size:21px;font-weight:800}.footer-title{font-weight:700;color:#fff;margin-bottom:14px}.footer-links{list-style:none;padding:0;margin:0}.footer-links li{margin:7px 0;font-size:14px}.footer-links a:hover{color:#f0bd75}.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:15px}
@media(max-width:992px){.navbar-nav{padding:15px 0}.nav-cta{display:inline-block}.data-row{grid-template-columns:55px 1fr}.data-row .tag{grid-column:2}.data-row .btn-outline{grid-column:2;width:max-content}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){:root{--space:60px}.topline{display:none}.page-hero{padding:50px 0}.cover{margin-top:28px}.cover img{height:280px}.scene-grid,.faq-layout{grid-template-columns:1fr}.process{grid-template-columns:1fr 1fr}.step{padding-right:12px}.metrics{grid-template-columns:1fr 1fr}.metric{margin-bottom:14px}.contact-box{padding:26px 20px}}
@media(max-width:520px){.brand{font-size:16px}.brand span{font-size:9px}.page-hero h1{font-size:36px}.page-hero p{font-size:15px}.data-row{display:block;padding:20px 0}.data-no{display:inline-block;margin-right:10px}.data-row h3{display:inline;font-size:18px}.data-row p{margin:8px 0 10px}.process{grid-template-columns:1fr}.metrics{gap:10px}.metric strong{font-size:28px}.footer-grid{grid-template-columns:1fr;gap:25px}.copyright{display:block}.copyright span{display:block;margin-bottom:8px}.hero-actions .btn-main,.hero-actions .btn-outline{width:100%;text-align:center}}

/* roulang page: category3 */
:root{
      --green:#185b50;--green-deep:#103f3a;--green-soft:#e6f0eb;--mint:#f3f7f3;
      --sand:#f5f0e8;--cream:#fcfbf7;--ink:#19302d;--muted:#6b7b77;
      --orange:#df8b4b;--orange-dark:#bc6d35;--line:#dce6df;--card:#fff;
      --radius:18px;--radius-lg:28px;--shadow:0 14px 38px rgba(23,62,53,.09);
      --max:1180px;--space:86px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{display:block;max-width:100%}
    .container{max-width:var(--max)}
    .topline{background:var(--green-deep);color:#cfe0d8;font-size:12px}
    .topline .container{height:40px;display:flex;align-items:center;justify-content:space-between}
    .topline a:hover{color:#fff}
    .main-nav{background:rgba(252,251,247,.98);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
    .navbar{min-height:76px}
    .brand{font-weight:800;font-size:20px;letter-spacing:.02em;color:var(--green-deep);white-space:nowrap}
    .brand span{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.12em;line-height:1.25}
    .nav-link{font-size:14px;font-weight:650;color:#53645f!important;padding:12px 12px!important;border-bottom:2px solid transparent}
    .nav-link:hover,.nav-link.active{color:var(--green)!important;border-color:var(--orange)}
    .nav-cta,.btn-main{background:var(--green);color:#fff;border:1px solid var(--green);border-radius:10px;padding:11px 18px;font-size:14px;font-weight:700}
    .nav-cta:hover,.btn-main:hover{background:var(--green-deep);color:#fff;transform:translateY(-2px)}
    .btn-outline{border:1px solid var(--green);color:var(--green);border-radius:10px;padding:11px 18px;font-weight:700;background:transparent}
    .btn-outline:hover{background:var(--green);color:#fff}
    .btn-main:focus,.btn-outline:focus,.nav-cta:focus,.form-control:focus,.form-select:focus{box-shadow:0 0 0 4px rgba(223,139,75,.22);outline:none}
    .page-hero{position:relative;overflow:hidden;background:var(--green-deep);color:#fff;padding:82px 0 76px}
    .page-hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(13,57,50,.97),rgba(13,57,50,.73),rgba(13,57,50,.3)),url("/assets/images/backpic/back-4.webp") center/cover}
    .page-hero .container{position:relative;z-index:1}
    .hero-copy{max-width:710px}
    .eyebrow,.section-kicker{font-size:12px;letter-spacing:.18em;color:var(--orange);font-weight:800}
    h1{font-size:clamp(36px,5vw,64px);line-height:1.18;letter-spacing:-.045em;margin:13px 0 20px;font-weight:800}
    .hero-copy p{font-size:17px;color:#dcebe5;max-width:660px;margin:0 0 28px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .hero-side{background:rgba(16,63,58,.86);border:1px solid rgba(255,255,255,.2);border-radius:var(--radius-lg);padding:24px;margin-top:18px}
    .hero-side strong{font-size:31px;color:#f0bd75;display:block;line-height:1.2}
    .hero-side span{font-size:13px;color:#c7dad1}
    .section{padding:var(--space) 0}
    .section-sand{background:var(--sand)}
    .section-mint{background:var(--mint)}
    .section-head{max-width:720px;margin-bottom:40px}
    .section-head h2{font-size:clamp(28px,3vw,42px);line-height:1.25;margin:10px 0 15px;letter-spacing:-.035em}
    .section-head p{color:var(--muted);margin:0}
    .split{display:grid;grid-template-columns:1.02fr .98fr;gap:38px;align-items:center}
    .visual-panel{position:relative}
    .visual-panel img{width:100%;height:390px;object-fit:cover;border-radius:var(--radius-lg)}
    .stamp{position:absolute;right:-14px;top:24px;background:var(--orange);color:#fff;padding:13px 15px;border-radius:50%;font-size:12px;font-weight:800;line-height:1.25;text-align:center;transform:rotate(8deg);box-shadow:0 9px 20px rgba(100,54,26,.2)}
    .tag{display:inline-block;font-size:12px;color:var(--green);background:var(--green-soft);border-radius:6px;padding:3px 9px;margin-bottom:13px;font-weight:700}
    .check-list,.module-list{padding:0;margin:20px 0 0;list-style:none}
    .check-list li{position:relative;padding:10px 0 10px 28px;border-bottom:1px solid var(--line);font-size:15px}
    .check-list li:before{content:"✓";position:absolute;left:0;color:var(--orange);font-weight:800}
    .module-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:32px}
    .module-nav{border-left:2px solid var(--line)}
    .module-nav button{display:block;width:100%;text-align:left;border:0;border-left:2px solid transparent;background:transparent;margin-left:-2px;padding:17px 20px;color:var(--muted);font-weight:700}
    .module-nav button:hover,.module-nav button.active{background:var(--green-soft);color:var(--green);border-color:var(--orange)}
    .module-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
    .module-panel h3{font-size:25px;margin:0 0 12px}
    .module-panel p{color:var(--muted);margin:0 0 18px}
    .module-points{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .point{border:1px solid var(--line);border-radius:12px;padding:14px;background:var(--mint);font-size:14px}
    .point b{display:block;color:var(--green);margin-bottom:3px}
    .scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .scene-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
    .scene-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#b6d2c4}
    .scene-card img{height:145px;width:100%;object-fit:cover}
    .scene-card div{padding:18px}
    .scene-card h3{font-size:18px;margin:0 0 7px}
    .scene-card p{font-size:13px;color:var(--muted);margin:0}
    .compare{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden}
    .compare-row{display:grid;grid-template-columns:1.2fr 1fr 1fr;border-bottom:1px solid var(--line)}
    .compare-row:last-child{border-bottom:0}
    .compare-row > div{padding:16px 20px;font-size:14px}
    .compare-row > div:not(:first-child){border-left:1px solid var(--line)}
    .compare-head{background:var(--green);color:#fff;font-weight:700}
    .compare-head > div:not(:first-child){border-color:rgba(255,255,255,.18)}
    .compare-row:not(.compare-head) > div:first-child{font-weight:700;color:var(--green)}
    .timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}
    .timeline:before{content:"";position:absolute;left:9%;right:9%;top:18px;height:2px;background:var(--line)}
    .step{position:relative;padding:48px 14px 0}
    .step i{position:absolute;top:7px;left:14px;width:23px;height:23px;border-radius:50%;background:var(--orange);border:6px solid var(--cream);box-shadow:0 0 0 2px var(--orange);z-index:1}
    .step b{display:block;color:var(--green);font-size:16px;margin-bottom:7px}
    .step span{font-size:13px;color:var(--muted)}
    .dark-section{background:var(--green-deep);color:#fff}
    .dark-section .section-head p{color:#bfd3ca}
    .guard-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:35px;align-items:stretch}
    .guard-intro{background:#185b50;border-radius:var(--radius-lg);padding:31px}
    .guard-intro h2{font-size:32px;line-height:1.3;margin:12px 0}
    .guard-intro p{color:#c9ded5}
    .guard-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .guard-item{border:1px solid rgba(255,255,255,.18);border-radius:14px;padding:20px;background:rgba(255,255,255,.04)}
    .guard-item b{display:block;color:#f0bd75;margin-bottom:6px}
    .guard-item span{font-size:13px;color:#c2d6cd}
    .faq-layout{display:grid;grid-template-columns:.78fr 1.22fr;gap:45px}
    .faq-note{color:var(--muted)}
    .accordion-item{border:1px solid var(--line)!important;border-radius:12px!important;margin-bottom:10px;overflow:hidden;background:#fff}
    .accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:19px}
    .accordion-button:not(.collapsed){color:var(--green);background:var(--green-soft);box-shadow:none}
    .accordion-body{font-size:14px;color:var(--muted);padding:0 20px 20px}
    .contact-section{background:var(--sand)}
    .contact-box{background:var(--green);color:#fff;border-radius:var(--radius-lg);padding:38px}
    .contact-box h2{font-size:32px;line-height:1.3;margin:10px 0 14px}
    .contact-box p{color:#cbe0d6}
    .form-label{font-size:13px;color:#d9e8e1;margin-bottom:6px}
    .form-control,.form-select{background:#fff;border:0;border-radius:9px;padding:12px 14px;min-height:48px}
    .form-control:focus,.form-select:focus{border-color:var(--orange)}
    .form-note{font-size:12px;color:#a9c4b8}
    .form-status{display:none;background:#e5f2e9;color:var(--green);padding:11px;border-radius:8px;margin-top:12px;font-size:14px}
    footer{background:#0e2e2a;color:#c4d8ce;padding:58px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}
    .footer-brand{color:#fff;font-size:21px;font-weight:800}
    .footer-title{font-weight:700;color:#fff;margin-bottom:14px}
    .footer-links{list-style:none;padding:0;margin:0}
    .footer-links li{margin:7px 0;font-size:14px}
    .footer-links a:hover{color:#f0bd75}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
    @media(max-width:992px){
      .nav-link{padding:10px 8px!important}
      .split,.module-layout,.guard-grid,.faq-layout{grid-template-columns:1fr}
      .scene-grid{grid-template-columns:repeat(2,1fr)}
      .timeline{grid-template-columns:repeat(3,1fr);gap:20px}
      .timeline:before{display:none}
    }
    @media(max-width:768px){
      :root{--space:62px}
      .topline .container{height:auto;min-height:38px;padding-top:7px;padding-bottom:7px}
      .topline .container span:last-child{display:none}
      .navbar{min-height:68px}
      .brand{font-size:17px}
      .brand span{font-size:9px}
      .navbar-collapse{padding:14px 0 8px}
      .nav-cta{display:block;text-align:center;margin-top:8px}
      .page-hero{padding:64px 0 58px}
      h1{font-size:40px}
      .hero-side{margin-top:35px}
      .visual-panel img{height:290px}
      .module-points,.guard-list{grid-template-columns:1fr}
      .compare{overflow-x:auto}
      .compare-row{min-width:650px}
      .timeline{grid-template-columns:1fr 1fr}
      .step{padding-top:42px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
    }
    @media(max-width:520px){
      .section-head{margin-bottom:28px}
      .scene-grid,.footer-grid{grid-template-columns:1fr}
      .hero-actions .btn-main,.hero-actions .btn-outline{width:100%;text-align:center}
      .contact-box{padding:25px 20px}
      .contact-box h2{font-size:27px}
      .timeline{grid-template-columns:1fr}
      .step{padding-left:42px;padding-top:0;min-height:88px}
      .step i{left:7px;top:3px}
      .copyright{display:block}
      .copyright span{display:block;margin-bottom:8px}
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}