/* roulang page: index */
:root{
      --blue-950:#102e4d;
      --blue-900:#173f68;
      --blue-800:#20598c;
      --blue-700:#2875b5;
      --blue-500:#4ca3d8;
      --blue-100:#eaf5fc;
      --blue-050:#f5faff;
      --teal:#39a99a;
      --orange:#f09a54;
      --ink:#172b3d;
      --muted:#647789;
      --line:#dce8f1;
      --paper:#ffffff;
      --mist:#f3f8fb;
      --shadow:0 18px 45px rgba(29,73,106,.10);
      --shadow-sm:0 8px 22px rgba(29,73,106,.08);
      --radius-lg:28px;
      --radius-md:18px;
      --radius-sm:11px;
      --max:1240px;
    }
    *,
    *::before,
    *::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--paper);
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
      font-size:16px;
      line-height:1.85;
      overflow-x:hidden;
    }
    img{max-width:100%;height:auto;display:block}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    button,input,select,textarea{font:inherit}
    button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
      outline:3px solid rgba(76,163,216,.35);
      outline-offset:3px
    }
    .container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
    .wide-container{width:min(1380px,calc(100% - 48px));margin:0 auto}
    .section{padding:108px 0;position:relative}
    .section--soft{background:var(--mist)}
    .section--blue{background:var(--blue-050)}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      color:var(--blue-700);font-size:13px;font-weight:800;
      letter-spacing:.12em;margin-bottom:16px
    }
    .eyebrow::before{content:"";width:25px;height:2px;background:var(--teal);display:inline-block}
    h1,h2,h3,h4{margin:0;color:var(--blue-950);font-weight:800;letter-spacing:-.03em}
    h1{font-size:clamp(40px,5vw,72px);line-height:1.16}
    h2{font-size:clamp(30px,3.5vw,48px);line-height:1.25}
    h3{font-size:22px;line-height:1.4}
    p{margin:0 0 18px;color:var(--muted)}
    .section-heading{max-width:720px;margin-bottom:48px}
    .section-heading p{font-size:18px;line-height:1.9;margin-top:18px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:9px;
      min-height:50px;padding:12px 24px;border-radius:12px;
      border:1px solid transparent;font-weight:800;font-size:15px;
      cursor:pointer;transition:transform .25s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:var(--blue-800);color:#fff;box-shadow:0 10px 20px rgba(32,89,140,.22)}
    .btn-primary:hover{background:var(--blue-950);box-shadow:0 14px 28px rgba(32,89,140,.28)}
    .btn-light{background:#fff;color:var(--blue-800);border-color:var(--line);box-shadow:var(--shadow-sm)}
    .btn-light:hover{border-color:var(--blue-500);background:var(--blue-050)}
    .btn-text{padding:10px 0;min-height:auto;color:var(--blue-800);border-bottom:1px solid var(--blue-500);border-radius:0}
    .tag{
      display:inline-flex;align-items:center;padding:5px 10px;border-radius:100px;
      background:var(--blue-100);color:var(--blue-800);font-size:12px;font-weight:800
    }
    .tag--green{background:#e8f7f3;color:#187568}
    .tag--orange{background:#fff2e6;color:#a85c20}
    .site-header{
      position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);
      border-bottom:1px solid var(--line);box-shadow:0 4px 20px rgba(24,65,96,.05)
    }
    .nav-shell{height:82px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px}
    .nav-group{display:flex;align-items:center;gap:22px}
    .nav-group--right{justify-content:flex-end}
    .nav-link{position:relative;color:#526b7d;font-size:14px;font-weight:700;padding:9px 0;white-space:nowrap}
    .nav-link:hover{color:var(--blue-800)}
    .nav-link.active{color:var(--blue-950)}
    .nav-link.active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;border-radius:3px;background:var(--teal)}
    .brand{display:flex;align-items:center;gap:10px;color:var(--blue-950);font-size:23px;font-weight:900;letter-spacing:-.06em;white-space:nowrap}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue-800);position:relative;overflow:hidden}
    .brand-mark::before,.brand-mark::after{content:"";position:absolute;border-radius:50%;border:2px solid #9bd8e1}
    .brand-mark::before{width:25px;height:25px;left:-7px;top:12px}
    .brand-mark::after{width:18px;height:18px;right:-4px;top:-5px;border-color:#fff}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--blue-900);border-radius:10px;width:43px;height:40px;font-size:21px}
    .hero{padding:72px 0 54px;background:linear-gradient(180deg,#f6fbfe 0%,#fff 90%);position:relative;overflow:hidden}
    .hero::after{content:"";position:absolute;width:430px;height:430px;border-radius:50%;right:-150px;top:80px;background:rgba(76,163,216,.08);pointer-events:none}
    .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center;position:relative;z-index:1}
    .hero-copy{padding:24px 0}
    .hero-copy h1 span{color:var(--blue-700)}
    .hero-lead{font-size:19px;line-height:1.9;max-width:650px;margin:26px 0 30px}
    .hero-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
    .hero-note{display:flex;gap:18px;flex-wrap:wrap;margin-top:34px;color:var(--muted);font-size:13px}
    .hero-note strong{color:var(--blue-900);font-size:22px;display:block;line-height:1.2}
    .hero-note span{display:block}
    .hero-stage{min-height:465px;position:relative;padding:26px}
    .hero-image{height:350px;width:100%;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
    .hero-image-wrap{position:relative}
    .hero-image-wrap::after{content:"";position:absolute;inset:0;border-radius:var(--radius-lg);background:linear-gradient(180deg,transparent 45%,rgba(13,45,76,.58))}
    .hero-caption{position:absolute;z-index:2;bottom:26px;left:28px;right:28px;color:#fff}
    .hero-caption strong{font-size:22px;display:block}
    .data-card{position:absolute;background:#fff;border:1px solid var(--line);border-radius:17px;padding:18px;box-shadow:var(--shadow-sm);z-index:3}
    .data-card--top{top:0;right:0;width:205px}
    .data-card--bottom{left:0;bottom:0;width:220px}
    .data-card small{color:var(--muted);display:block;font-size:12px}
    .data-card b{font-size:27px;color:var(--blue-950);line-height:1.35}
    .sparkline{height:38px;display:flex;align-items:end;gap:5px;margin-top:8px}
    .sparkline i{display:block;width:10px;background:var(--teal);border-radius:4px 4px 1px 1px}
    .trust-strip{border-top:1px solid var(--line);padding-top:27px;margin-top:50px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;color:var(--muted);font-size:14px}
    .trust-strip span{display:inline-flex;align-items:center;gap:8px}
    .dot{width:8px;height:8px;border-radius:50%;background:var(--teal);display:inline-block}
    .scene-layout{display:grid;grid-template-columns:5fr 7fr;gap:70px;align-items:start}
    .scene-copy{position:sticky;top:120px}
    .scene-copy p{font-size:18px;line-height:1.95}
    .scene-list{border-top:1px solid var(--line)}
    .scene-item{display:grid;grid-template-columns:65px 1fr 145px;gap:22px;align-items:center;padding:27px 0;border-bottom:1px solid var(--line)}
    .scene-num{font-size:29px;color:var(--blue-500);font-weight:900}
    .scene-item h3{font-size:20px;margin-bottom:7px}
    .scene-item p{margin:0;font-size:14px;line-height:1.75}
    .scene-state{font-size:13px;color:#187568;background:#e8f7f3;border-radius:10px;padding:8px 12px;text-align:center}
    .solution-layout{display:grid;grid-template-columns:7fr 5fr;gap:25px;align-items:stretch}
    .solution-main{padding:40px;background:var(--blue-900);color:#fff;border-radius:var(--radius-lg);min-height:440px;position:relative;overflow:hidden}
    .solution-main::after{content:"";position:absolute;width:240px;height:240px;border:1px solid rgba(255,255,255,.18);border-radius:50%;right:-65px;bottom:-75px}
    .solution-main h3,.solution-main p{color:#fff;position:relative;z-index:1}
    .solution-main p{opacity:.82;max-width:600px}
    .solution-points{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:40px;position:relative;z-index:1}
    .solution-point{padding:18px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);border-radius:14px}
    .solution-point b{display:block;color:#fff;margin-bottom:5px}
    .solution-point span{font-size:13px;color:#d7e8f3;line-height:1.65}
    .solution-side{display:grid;gap:25px}
    .feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:30px;box-shadow:var(--shadow-sm)}
    .feature-card:hover,.news-card:hover,.quote:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .feature-card,.news-card,.quote{transition:.28s ease}
    .feature-card h3{margin:15px 0 8px}
    .feature-card p{font-size:14px;margin:0}
    .feature-icon{width:42px;height:42px;border-radius:13px;background:var(--blue-100);color:var(--blue-800);display:grid;place-items:center;font-weight:900}
    .deep-feature{display:grid;grid-template-columns:7fr 5fr;gap:60px;align-items:center}
    .deep-feature.reverse{grid-template-columns:5fr 7fr}
    .deep-feature.reverse .deep-image{order:2}
    .deep-image img{width:100%;height:390px;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
    .deep-copy p{font-size:16px;line-height:2}
    .check-list{list-style:none;margin:24px 0 0;padding:0}
    .check-list li{position:relative;padding:10px 0 10px 28px;border-bottom:1px solid var(--line);color:#4c6475}
    .check-list li::before{content:"✓";position:absolute;left:0;top:10px;color:var(--teal);font-weight:900}
    .index-panel{border:1px solid var(--line);border-radius:var(--radius-lg);background:#fff;padding:36px;box-shadow:var(--shadow-sm)}
    .index-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 42px}
    .index-row{display:flex;justify-content:space-between;gap:15px;padding:17px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:14px}
    .index-row strong{color:var(--blue-900)}
    .result-band{background:var(--blue-050);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
    .metric{padding:25px 30px;border-right:1px solid var(--line)}
    .metric:last-child{border-right:0}
    .metric strong{display:block;color:var(--blue-900);font-size:39px;line-height:1.25}
    .metric span{display:block;color:var(--muted);font-size:14px;margin-top:4px}
    .metric em{font-style:normal;color:var(--teal);font-size:12px}
    .compare-layout{display:grid;grid-template-columns:4fr 8fr;gap:70px;align-items:start}
    .compare-copy p{font-size:17px;line-height:1.95}
    .compare-list{display:grid;grid-template-columns:1fr 1fr;gap:17px}
    .compare-box{background:#fff;border:1px solid var(--line);border-radius:15px;padding:22px}
    .compare-box h3{font-size:18px;margin-bottom:10px}
    .compare-box p{font-size:14px;margin:0}
    .compare-box.highlight{background:var(--blue-900);border-color:var(--blue-900)}
    .compare-box.highlight h3,.compare-box.highlight p{color:#fff}
    .brand-story{display:grid;grid-template-columns:1fr 1.25fr;gap:70px;align-items:center}
    .story-card{padding:38px 42px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}
    .story-card p{font-size:17px;line-height:2}
    .story-aside{padding:32px;border-left:4px solid var(--teal);background:#f7fcfd}
    .story-aside strong{display:block;font-size:28px;color:var(--blue-900);margin-bottom:10px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;position:relative}
    .timeline::before{content:"";position:absolute;left:7%;right:7%;top:35px;height:1px;background:var(--line)}
    .timeline-item{position:relative;padding-top:70px}
    .timeline-dot{position:absolute;top:24px;left:0;width:24px;height:24px;border-radius:50%;background:#fff;border:6px solid var(--teal);z-index:1}
    .timeline-item h3{font-size:18px;margin-bottom:8px}
    .timeline-item p{font-size:14px}
    .quote-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:24px}
    .quote{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:38px;box-shadow:var(--shadow-sm)}
    .quote--main{background:var(--blue-900);color:#fff;min-height:275px}
    .quote--main p,.quote--main strong,.quote--main small{color:#fff}
    .quote p{font-size:20px;line-height:1.9}
    .quote small{color:var(--muted)}
    .quote-stack{display:grid;gap:24px}
    .quote-stack .quote{padding:25px}
    .quote-stack p{font-size:15px;margin-bottom:10px}
    .news-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:26px}
    .news-feature{position:relative;min-height:425px;border-radius:var(--radius-lg);overflow:hidden;background:#173f68}
    .news-feature img{width:100%;height:100%;min-height:425px;object-fit:cover;opacity:.76}
    .news-feature::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 25%,rgba(11,38,64,.9))}
    .news-feature-content{position:absolute;z-index:2;left:32px;right:32px;bottom:28px;color:#fff}
    .news-feature-content h3{color:#fff;font-size:27px;margin:12px 0}
    .news-feature-content p{color:#dcebf3;font-size:14px}
    .news-list{border-top:1px solid var(--line)}
    .news-card{display:grid;grid-template-columns:78px 1fr;gap:18px;border-bottom:1px solid var(--line);padding:20px 0}
    .news-date{color:var(--blue-700);font-weight:900;font-size:14px;line-height:1.35}
    .news-date span{display:block;color:var(--muted);font-size:11px;font-weight:600}
    .news-card h3{font-size:17px;margin-bottom:5px}
    .news-card p{font-size:13px;line-height:1.7;margin:0 0 8px}
    .more-link{color:var(--blue-800);font-size:13px;font-weight:800}
    .faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:65px}
    .faq-intro p{font-size:17px;line-height:1.95}
    .faq-item{border-bottom:1px solid var(--line)}
    .faq-question{width:100%;border:0;background:transparent;text-align:left;padding:21px 42px 21px 0;color:var(--blue-950);font-weight:800;font-size:17px;cursor:pointer;position:relative}
    .faq-question::after{content:"+";position:absolute;right:8px;top:17px;color:var(--teal);font-size:25px;font-weight:400;transition:.2s}
    .faq-question[aria-expanded="true"]::after{content:"−"}
    .faq-answer{display:none;padding:0 40px 22px 0;color:var(--muted);font-size:14px;line-height:1.9}
    .faq-answer.open{display:block}
    .cta-panel{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:52px 60px;border-radius:var(--radius-lg);background:var(--blue-100);border:1px solid #cce5f3;position:relative;overflow:hidden}
    .cta-panel::after{content:"";position:absolute;width:270px;height:270px;border:1px solid rgba(40,117,181,.16);border-radius:50%;right:-60px;bottom:-100px}
    .cta-panel h2{font-size:38px}
    .cta-panel p{font-size:16px;max-width:650px;margin-top:15px}
    .feedback-form{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--shadow-sm);position:relative;z-index:1}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    label{display:block;font-size:13px;font-weight:800;color:var(--blue-900);margin-bottom:6px}
    input,select,textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:11px 13px;color:var(--ink);background:#fbfdff;transition:.2s}
    input:focus,select:focus,textarea:focus{border-color:var(--blue-500);background:#fff;box-shadow:0 0 0 3px rgba(76,163,216,.12);outline:0}
    textarea{min-height:88px;resize:vertical}
    .form-full{grid-column:1/-1}
    .form-tip{font-size:12px;color:var(--muted);margin-top:10px}
    .footer{background:var(--blue-950);color:#d6e4ed;padding:64px 0 25px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.16)}
    .footer .brand{color:#fff;margin-bottom:17px}
    .footer p{color:#abc0ce;font-size:14px;line-height:1.9}
    .footer h3{color:#fff;font-size:16px;margin-bottom:15px}
    .footer a{color:#abc0ce;font-size:14px;display:block;margin:7px 0}
    .footer a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;padding-top:22px;color:#91aab9;font-size:12px}
    .footer-bottom a{display:inline;color:#b8cfdb;margin:0 8px}
    .back-top{position:fixed;right:22px;bottom:22px;width:44px;height:44px;border:1px solid var(--line);border-radius:50%;background:#fff;color:var(--blue-800);box-shadow:var(--shadow-sm);cursor:pointer;opacity:0;pointer-events:none;transition:.25s;z-index:40}
    .back-top.show{opacity:1;pointer-events:auto}
    .breadcrumb{padding:18px 0 0;font-size:13px;color:var(--muted)}
    .breadcrumb a{color:var(--blue-700)}
    .section-label{color:var(--blue-700);font-size:13px;font-weight:800}
    @media(max-width:1024px){
      .nav-shell{gap:12px}.nav-group{gap:14px}.nav-link{font-size:13px}
      .hero-grid,.deep-feature,.deep-feature.reverse,.brand-story,.compare-layout,.faq-layout{gap:38px}
      .section{padding:82px 0}
      .metrics{grid-template-columns:repeat(2,1fr)}
      .metric:nth-child(2){border-right:0}.metric{border-bottom:1px solid var(--line)}
    }
    @media(max-width:760px){
      .container,.wide-container{width:min(100% - 32px,620px)}
      .site-header{position:relative}
      .nav-shell{height:70px;grid-template-columns:45px 1fr 45px}
      .brand{justify-content:center;font-size:20px}.brand-mark{width:30px;height:30px}
      .menu-toggle{display:block}.menu-toggle--left{grid-column:1;grid-row:1}
      .nav-shell .brand{grid-column:2;grid-row:1}
      .nav-shell .menu-toggle--right{grid-column:3;grid-row:1}
      .nav-group{display:none;position:absolute;top:70px;left:16px;right:16px;background:#fff;border:1px solid var(--line);border-radius:15px;padding:17px;box-shadow:var(--shadow);z-index:10}
      .nav-group.open{display:flex;flex-direction:column;align-items:stretch;gap:3px}
      .nav-group .nav-link{padding:10px 8px}.nav-group--left{left:16px;right:16px}.nav-group--right{justify-content:flex-start}
      .hero{padding:47px 0 35px}.hero-grid,.solution-layout,.deep-feature,.deep-feature.reverse,.brand-story,.compare-layout,.quote-layout,.news-layout,.faq-layout,.cta-panel{grid-template-columns:1fr}
      .hero-stage{min-height:385px;padding:20px 0}.hero-image{height:300px}.data-card--top{right:-2px}.data-card--bottom{left:-2px}
      .hero-lead{font-size:17px}.hero-actions .btn{width:100%}.hero-actions{gap:10px}
      .trust-strip{margin-top:32px}.scene-copy{position:static}.scene-layout{grid-template-columns:1fr;gap:35px}
      .scene-item{grid-template-columns:42px 1fr;gap:12px}.scene-state{grid-column:2;justify-self:start}
      .solution-main{min-height:auto;padding:28px}.solution-points{grid-template-columns:1fr}
      .deep-feature.reverse .deep-image{order:0}.deep-image img{height:280px}
      .index-grid,.compare-list,.form-grid{grid-template-columns:1fr}
      .form-full{grid-column:auto}.metrics{grid-template-columns:1fr 1fr}.metric{padding:20px 13px}.metric strong{font-size:29px}
      .timeline{grid-template-columns:1fr;gap:20px}.timeline::before{left:11px;right:auto;top:22px;bottom:22px;width:1px;height:auto}.timeline-item{padding:0 0 0 48px}.timeline-dot{top:5px}
      .cta-panel{padding:30px 22px}.cta-panel h2{font-size:29px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-grid>div:first-child{grid-column:1/-1}
      .section{padding:70px 0}.section-heading{margin-bottom:32px}.section-heading p{font-size:16px}
    }
    @media(max-width:480px){
      h1{font-size:38px}.metrics{grid-template-columns:1fr}.metric{border-right:0}
      .footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}
      .hero-stage{min-height:350px}.hero-image{height:260px}.data-card{padding:13px;width:170px}.data-card--bottom{width:190px}.data-card b{font-size:23px}
    }

/* roulang page: category3 */
:root{
      --blue-950:#102e4d;--blue-900:#173f68;--blue-800:#20598c;--blue-700:#2875b5;--blue-500:#4ca3d8;
      --blue-100:#eaf5fc;--blue-050:#f5faff;--teal:#39a99a;--orange:#f09a54;--ink:#172b3d;
      --muted:#647789;--line:#dce8f1;--paper:#fff;--mist:#f3f8fb;
      --shadow:0 18px 45px rgba(29,73,106,.10);--shadow-sm:0 8px 22px rgba(29,73,106,.08);
      --radius-lg:28px;--radius-md:18px;--radius-sm:11px;--max:1240px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;font-size:16px;line-height:1.85;overflow-x:hidden}
    img{display:block;max-width:100%;height:auto}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    button,input,textarea{font:inherit}
    button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(76,163,216,.38);outline-offset:3px}
    .container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
    .wide-container{width:min(1380px,calc(100% - 48px));margin:0 auto}
    h1,h2,h3,h4,p{margin-top:0}
    h1{font-size:clamp(39px,5vw,70px);line-height:1.16;letter-spacing:-.055em;margin-bottom:20px}
    h2{font-size:clamp(29px,3vw,44px);line-height:1.25;letter-spacing:-.035em;margin-bottom:16px}
    h3{font-size:21px;line-height:1.4;margin-bottom:10px}
    p{color:var(--muted)}
    .section{padding:98px 0;position:relative}
    .section--soft{background:var(--mist)}
    .section--blue{background:var(--blue-050)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-700);font-size:13px;font-weight:800;letter-spacing:.12em;margin-bottom:16px}
    .eyebrow:before{content:"";width:25px;height:2px;background:var(--teal)}
    .section-heading{max-width:760px;margin-bottom:44px}
    .section-heading p{font-size:18px;line-height:1.9;margin-bottom:0}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:50px;padding:12px 24px;border-radius:12px;border:1px solid transparent;font-weight:800;font-size:15px;cursor:pointer;transition:.25s ease}
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:var(--blue-800);color:#fff;box-shadow:0 10px 20px rgba(32,89,140,.22)}
    .btn-primary:hover{background:var(--blue-950);box-shadow:0 14px 28px rgba(32,89,140,.28)}
    .btn-light{background:#fff;color:var(--blue-800);border-color:var(--line);box-shadow:var(--shadow-sm)}
    .btn-light:hover{border-color:var(--blue-500);background:var(--blue-050)}
    .btn-text{padding:8px 0;min-height:auto;color:var(--blue-800);border-bottom:1px solid var(--blue-500);border-radius:0}
    .tag{display:inline-flex;align-items:center;padding:5px 10px;border-radius:100px;background:var(--blue-100);color:var(--blue-800);font-size:12px;font-weight:800}
    .tag--green{background:#e8f7f3;color:#187568}.tag--orange{background:#fff2e6;color:#a85c20}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 4px 20px rgba(24,65,96,.05)}
    .nav-shell{height:82px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px}
    .nav-group{display:flex;align-items:center;gap:22px}.nav-group--right{justify-content:flex-end}
    .nav-link{position:relative;color:#526b7d;font-size:14px;font-weight:700;padding:9px 0;white-space:nowrap}
    .nav-link:hover{color:var(--blue-800)}.nav-link.active{color:var(--blue-950)}
    .nav-link.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;border-radius:3px;background:var(--teal)}
    .brand{display:flex;align-items:center;gap:10px;color:var(--blue-950);font-size:23px;font-weight:900;letter-spacing:-.06em;white-space:nowrap}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue-800);position:relative;overflow:hidden}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;border-radius:50%;border:2px solid #9bd8e1}
    .brand-mark:before{width:25px;height:25px;left:-7px;top:12px}.brand-mark:after{width:18px;height:18px;right:-4px;top:-5px;border-color:#fff}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--blue-900);border-radius:10px;width:43px;height:40px;font-size:21px}
    .breadcrumb{padding:22px 0 0;font-size:13px;color:var(--muted)}.breadcrumb a{color:var(--blue-700)}.breadcrumb span{padding:0 8px;color:#a8bac7}
    .mag-hero{background:#122d49;color:#fff;padding:38px 0 90px;position:relative;overflow:hidden}
    .mag-hero:after{content:"";position:absolute;width:520px;height:520px;border:1px solid rgba(155,216,225,.18);border-radius:50%;right:-170px;top:-180px}
    .mag-hero .breadcrumb{color:#b9cad7}.mag-hero .breadcrumb a{color:#b9e3e7}
    .mag-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:64px;align-items:center;position:relative;z-index:1;margin-top:55px}
    .mag-copy .eyebrow{color:#a9dfe2}.mag-copy h1{max-width:600px}.mag-copy h1 span{color:#a9dfe2}
    .mag-copy p{color:#d0dde6;max-width:600px;font-size:18px;line-height:1.95}
    .hero-actions{display:flex;gap:18px;align-items:center;flex-wrap:wrap;margin-top:28px}.mag-hero .btn-primary{background:#56b5b1;color:#102e4d}.mag-hero .btn-light{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.3);color:#fff;box-shadow:none}
    .poster-wrap{position:relative;max-width:560px;margin-left:auto}.poster{width:100%;height:440px;object-fit:cover;border-radius:25px;box-shadow:0 25px 55px rgba(0,0,0,.3);filter:saturate(.9)}
    .poster-label{position:absolute;left:25px;bottom:24px;right:25px;color:#fff;z-index:2}.poster-label strong{display:block;font-size:25px}.poster-label small{color:#d5e5ea}
    .poster-wrap:after{content:"";position:absolute;inset:0;border-radius:25px;background:linear-gradient(180deg,transparent 38%,rgba(8,26,43,.84))}
    .heat-badge{position:absolute;right:-20px;top:22px;z-index:3;background:#fff;color:var(--blue-900);padding:14px 17px;border-radius:14px;box-shadow:var(--shadow);font-size:13px;font-weight:800}.heat-badge b{display:block;font-size:24px;color:var(--orange);line-height:1.3}
    .index-layout{display:grid;grid-template-columns:300px 1fr;gap:70px}.index-nav{position:sticky;top:115px;align-self:start;border-left:2px solid var(--line);padding-left:24px}.index-nav a{display:block;color:var(--muted);font-weight:700;padding:10px 0}.index-nav a:hover,.index-nav a.active{color:var(--blue-800)}
    .feature-story{display:grid;grid-template-columns:1.08fr .92fr;gap:34px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
    .feature-story img{width:100%;height:100%;min-height:330px;object-fit:cover}.feature-body{padding:38px 38px 34px}.feature-body h3{font-size:28px;line-height:1.35}.feature-body p{line-height:1.9}
    .meta{display:flex;align-items:center;gap:13px;color:#8396a4;font-size:13px;margin:12px 0 18px}.read-link{display:inline-flex;color:var(--blue-800);font-weight:800;margin-top:12px;border-bottom:1px solid var(--blue-500)}
    .story-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:24px}.story-card{padding:27px;background:var(--blue-050);border:1px solid var(--line);border-radius:var(--radius-md);transition:.25s ease}.story-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm);border-color:#acd5e8}.story-card h3{font-size:20px}.story-card p{font-size:14px;line-height:1.8;margin-bottom:0}
    .long-read{display:grid;grid-template-columns:5fr 7fr;gap:75px;align-items:start}.long-read .article-copy{max-width:690px}.article-copy p{font-size:17px;line-height:2;margin-bottom:21px}.pullquote{border-left:4px solid var(--teal);padding:13px 0 13px 24px;margin:27px 0;color:var(--blue-900);font-size:22px;font-weight:800;line-height:1.6}
    .side-note{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:28px;box-shadow:var(--shadow-sm)}.side-note h3{color:var(--blue-900)}.side-note ul{padding-left:20px;margin-bottom:0;color:var(--muted)}.side-note li{margin:10px 0}
    .visual-band{display:grid;grid-template-columns:7fr 5fr;gap:50px;align-items:center}.visual-band img{height:365px;width:100%;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}.visual-copy p{font-size:17px;line-height:1.95}.check-list{list-style:none;margin:23px 0 0;padding:0}.check-list li{padding:10px 0 10px 28px;border-bottom:1px solid var(--line);position:relative;color:#506879}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:900}
    .insight-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:28px}.insight-main,.insight-side{border-radius:var(--radius-lg);padding:38px}.insight-main{background:var(--blue-900);color:#fff}.insight-main p{color:#d4e2ea}.insight-side{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm)}.insight-main h3{font-size:26px}.insight-main .tag{background:rgba(255,255,255,.13);color:#bde6e4}.insight-side p{font-size:14px}.number-line{display:flex;gap:30px;margin-top:30px}.number-line b{font-size:32px;color:#a9dfe2;display:block;line-height:1.25}.number-line small{color:#c5d7e1}
    .brand-story{display:grid;grid-template-columns:1fr 1.35fr;gap:70px;align-items:start}.brand-story .story-text p{font-size:17px;line-height:2}.brand-story .story-note{padding:30px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-sm)}.story-note strong{font-size:19px;color:var(--blue-900)}
    .quote-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:28px}.quote-primary{background:#e9f6f8;border-radius:var(--radius-lg);padding:45px}.quote-primary blockquote{font-size:27px;line-height:1.65;color:var(--blue-950);font-weight:800;margin:0 0 20px}.quote-primary cite,.quote-card cite{font-style:normal;color:var(--muted);font-size:14px}.quote-list{display:grid;gap:18px}.quote-card{padding:25px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md)}.quote-card p{margin-bottom:10px}
    .faq-wrap{max-width:900px}.accordion-item{border-bottom:1px solid var(--line)}.accordion-trigger{width:100%;background:transparent;border:0;text-align:left;padding:22px 42px 22px 0;color:var(--blue-950);font-weight:800;font-size:17px;position:relative;cursor:pointer}.accordion-trigger:after{content:"＋";position:absolute;right:4px;color:var(--blue-700);font-size:24px;top:18px}.accordion-trigger[aria-expanded=true]:after{content:"−";color:var(--teal)}.accordion-panel{display:none;padding:0 42px 22px 0}.accordion-panel.open{display:block}.accordion-panel p{margin:0;line-height:1.9}
    .cta-panel{background:#eaf5fc;border:1px solid #cde5f2;border-radius:var(--radius-lg);padding:46px 52px;display:grid;grid-template-columns:1fr auto;gap:35px;align-items:center}.cta-panel p{max-width:690px;margin-bottom:0}.cta-actions{display:flex;gap:15px;flex-wrap:wrap}
    .footer{background:#102e4d;color:#d4e3ec;padding:70px 0 25px}.footer .brand{color:#fff}.footer .brand-mark{background:#2875b5}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:42px}.footer p{color:#b6cad6;max-width:320px;font-size:14px;line-height:1.9}.footer h3{font-size:15px;color:#fff;margin-bottom:15px}.footer-grid>div>a:not(.brand){display:block;color:#b6cad6;font-size:14px;margin:8px 0}.footer-grid>div>a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.15);margin-top:48px;padding-top:20px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#a9bfcc}.footer-bottom a{color:#cce9ee}.backtop{position:fixed;right:20px;bottom:20px;width:42px;height:42px;border-radius:50%;background:var(--blue-800);color:#fff;border:0;box-shadow:var(--shadow-sm);cursor:pointer;opacity:.9}
    @media(max-width:1024px){.nav-group{gap:13px}.nav-link{font-size:13px}.mag-grid,.long-read,.visual-band,.brand-story{gap:38px}.index-layout{gap:35px}}
    @media(max-width:768px){.container,.wide-container{width:min(100% - 32px,620px)}.section{padding:70px 0}.nav-shell{height:70px;grid-template-columns:44px 1fr 44px;gap:7px}.brand{justify-content:center;font-size:20px}.nav-group{display:none;position:absolute;top:70px;left:16px;right:16px;background:#fff;padding:16px 20px;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:4px}.nav-group.show{display:flex}.nav-link{padding:10px 4px}.menu-toggle{display:block}.menu-toggle--left{justify-self:start}.menu-toggle--right{justify-self:end}.mag-grid,.feature-story,.long-read,.visual-band,.insight-grid,.brand-story,.quote-layout,.cta-panel{grid-template-columns:1fr}.mag-grid{margin-top:35px}.poster{height:350px}.heat-badge{right:10px}.index-layout{grid-template-columns:1fr}.index-nav{position:static;display:flex;gap:16px;overflow:auto;border-left:0;border-bottom:1px solid var(--line);padding:0 0 14px;white-space:nowrap}.feature-story img{height:250px;min-height:0}.feature-body{padding:28px}.story-grid{grid-template-columns:1fr}.visual-band img{height:290px}.footer-grid{grid-template-columns:1fr 1fr}.footer-bottom{display:block}.footer-bottom>div{margin-top:8px}}
    @media(max-width:520px){h1{font-size:38px}.hero-actions,.cta-actions{align-items:stretch;flex-direction:column}.btn{width:100%}.poster{height:280px}.feature-body h3{font-size:23px}.number-line{gap:18px;flex-wrap:wrap}.number-line b{font-size:26px}.quote-primary{padding:30px 24px}.quote-primary blockquote{font-size:22px}.insight-main,.insight-side{padding:28px 24px}.footer-grid{grid-template-columns:1fr}.footer{padding-top:52px}}

/* roulang page: category2 */
:root{
      --blue-950:#102e4d;--blue-900:#173f68;--blue-800:#20598c;--blue-700:#2875b5;--blue-500:#4ca3d8;
      --blue-100:#eaf5fc;--blue-050:#f5faff;--teal:#39a99a;--orange:#f09a54;--ink:#172b3d;
      --muted:#647789;--line:#dce8f1;--paper:#fff;--mist:#f3f8fb;
      --shadow:0 18px 45px rgba(29,73,106,.10);--shadow-sm:0 8px 22px rgba(29,73,106,.08);
      --radius-lg:28px;--radius-md:18px;--radius-sm:11px;--max:1240px;
    }
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;font-size:16px;line-height:1.85;overflow-x:hidden}
    h1,h2,h3,h4,p{margin-top:0}h1{font-size:clamp(36px,5vw,64px);line-height:1.18;letter-spacing:-.045em;margin-bottom:0}h2{font-size:clamp(28px,3.4vw,43px);line-height:1.3;letter-spacing:-.035em;margin-bottom:14px}h3{font-size:21px;line-height:1.45;margin-bottom:8px}p{color:var(--muted)}a{color:inherit;text-decoration:none;transition:.25s ease}img{max-width:100%;height:auto;display:block}button,input,select,textarea{font:inherit}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(76,163,216,.35);outline-offset:3px}.container{width:min(var(--max),calc(100% - 48px));margin:0 auto}.section{padding:94px 0;position:relative}.section--soft{background:var(--mist)}.section--blue{background:var(--blue-050)}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-700);font-size:13px;font-weight:800;letter-spacing:.12em;margin-bottom:16px}.eyebrow:before{content:"";width:25px;height:2px;background:var(--teal)}.section-heading{max-width:760px;margin-bottom:42px}.section-heading p{font-size:18px;line-height:1.9;margin:15px 0 0}.tag{display:inline-flex;align-items:center;padding:5px 11px;border-radius:100px;background:var(--blue-100);color:var(--blue-800);font-size:12px;font-weight:800}.tag--green{background:#e8f7f3;color:#187568}.tag--orange{background:#fff2e6;color:#a85c20}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 4px 20px rgba(24,65,96,.05)}.nav-shell{height:82px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px}.nav-group{display:flex;align-items:center;gap:22px}.nav-group--right{justify-content:flex-end}.nav-link{position:relative;color:#526b7d;font-size:14px;font-weight:700;padding:9px 0;white-space:nowrap}.nav-link:hover{color:var(--blue-800)}.nav-link.active{color:var(--blue-950)}.nav-link.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;border-radius:3px;background:var(--teal)}.brand{display:flex;align-items:center;gap:10px;color:var(--blue-950);font-size:23px;font-weight:900;letter-spacing:-.06em;white-space:nowrap}.brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue-800);position:relative;overflow:hidden}.brand-mark:before,.brand-mark:after{content:"";position:absolute;border-radius:50%;border:2px solid #9bd8e1}.brand-mark:before{width:25px;height:25px;left:-7px;top:12px}.brand-mark:after{width:18px;height:18px;right:-4px;top:-5px;border-color:#fff}.menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--blue-900);border-radius:10px;width:43px;height:40px;font-size:21px}
    .breadcrumb{padding:22px 0 0;color:var(--muted);font-size:13px}.breadcrumb a:hover{color:var(--blue-700)}
    .hero{padding:54px 0 74px;background:linear-gradient(180deg,#f6fbfe 0%,#fff 92%);position:relative;overflow:hidden}.hero:after{content:"";position:absolute;width:440px;height:440px;border-radius:50%;right:-160px;top:90px;background:rgba(76,163,216,.08);pointer-events:none}.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:68px;align-items:center;position:relative;z-index:1}.hero-copy h1 span{color:var(--blue-700)}.hero-lead{font-size:19px;line-height:1.9;max-width:620px;margin:24px 0 29px}.hero-actions{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:50px;padding:12px 23px;border-radius:12px;border:1px solid transparent;font-weight:800;font-size:15px;cursor:pointer;transition:.25s ease}.btn:hover{transform:translateY(-2px)}.btn-primary{background:var(--blue-800);color:#fff;box-shadow:0 10px 20px rgba(32,89,140,.22)}.btn-primary:hover{background:var(--blue-950);box-shadow:0 14px 28px rgba(32,89,140,.28)}.btn-light{background:#fff;color:var(--blue-800);border-color:var(--line);box-shadow:var(--shadow-sm)}.btn-light:hover{border-color:var(--blue-500);background:var(--blue-050)}.btn-text{padding:10px 0;min-height:auto;color:var(--blue-800);border-bottom:1px solid var(--blue-500);border-radius:0}
    .hero-stage{position:relative;min-height:425px;padding:24px}.hero-image{width:100%;height:330px;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}.hero-image-wrap{position:relative}.hero-image-wrap:after{content:"";position:absolute;inset:0;border-radius:var(--radius-lg);background:linear-gradient(180deg,transparent 40%,rgba(13,45,76,.62))}.hero-caption{position:absolute;z-index:2;bottom:24px;left:27px;color:#fff}.hero-caption strong{display:block;font-size:22px}.data-card{position:absolute;background:#fff;border:1px solid var(--line);border-radius:17px;padding:17px;box-shadow:var(--shadow-sm);z-index:3}.data-card--top{top:0;right:0;width:205px}.data-card--bottom{left:0;bottom:0;width:224px}.data-card small{color:var(--muted);display:block;font-size:12px}.data-card b{font-size:27px;color:var(--blue-950);line-height:1.35}
    .metric-band{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--radius-md);background:#fff;box-shadow:var(--shadow-sm);overflow:hidden}.metric{padding:25px 27px;border-right:1px solid var(--line)}.metric:last-child{border:0}.metric strong{display:block;color:var(--blue-900);font-size:30px;line-height:1.2}.metric span{color:var(--muted);font-size:13px}
    .trend-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:start}.chart-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow)}.chart-head{display:flex;justify-content:space-between;gap:15px;align-items:start}.chart-area{height:245px;margin-top:28px;position:relative;border-left:1px solid #cddde8;border-bottom:1px solid #cddde8;background:repeating-linear-gradient(to bottom,transparent 0,transparent 60px,#eaf1f5 61px)}.line-chart{position:absolute;inset:25px 18px 0 12px;width:calc(100% - 30px);height:200px}.chart-labels{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;margin-top:8px}.legend{display:flex;gap:18px;margin-top:20px;font-size:13px;color:var(--muted)}.legend i{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--blue-700);margin-right:6px}.legend i.green{background:var(--teal)}.note-list{display:grid;gap:14px}.note-item{padding:20px 0 20px 23px;border-left:3px solid var(--teal);background:#fff;border-radius:0 14px 14px 0}.note-item p{font-size:14px;margin:0}.note-item b{display:block;color:var(--blue-950);margin-bottom:4px}
    .split-content{display:grid;grid-template-columns:5fr 7fr;gap:55px;align-items:center}.split-content.reverse{grid-template-columns:7fr 5fr}.split-content.reverse .split-image{order:2}.split-image img{width:100%;height:360px;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}.copy p{font-size:16px}.copy p+p{margin-top:14px}.check-list{padding:0;margin:24px 0 0;list-style:none}.check-list li{padding:12px 0 12px 28px;border-bottom:1px solid var(--line);position:relative;color:#41586b}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:900}.info-panel{padding:33px;background:var(--blue-900);color:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow)}.info-panel p{color:#d4e6f2}.info-panel .check-list li{border-color:rgba(255,255,255,.18);color:#e4f0f7}
    .scenario-grid{display:grid;grid-template-columns:1.25fr .75fr .95fr;gap:18px}.scenario-card{padding:28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);min-height:220px}.scenario-card.feature{background:var(--blue-100);min-height:280px}.scenario-card p{font-size:14px}.number{font-size:42px;font-weight:900;color:var(--blue-500);line-height:1;margin-bottom:23px}
    .method-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px}.method-list{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.method-item{padding:22px;border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff}.method-item b{display:block;color:var(--blue-900);margin-bottom:6px}.method-item p{font-size:14px;margin:0}.quote-block{border-left:5px solid var(--orange);padding:18px 0 18px 28px;margin-top:26px;color:var(--blue-950);font-size:20px;line-height:1.7}
    .feature-photo{display:grid;grid-template-columns:1.2fr .8fr;gap:25px;align-items:stretch}.feature-photo img{width:100%;height:275px;object-fit:cover;border-radius:var(--radius-md)}.photo-copy{padding:25px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md)}.photo-copy p{font-size:14px}
    .faq-wrap{max-width:900px}.faq-item{border-top:1px solid var(--line)}.faq-question{width:100%;background:none;border:0;padding:22px 42px 22px 0;text-align:left;color:var(--blue-950);font-weight:800;font-size:17px;position:relative;cursor:pointer}.faq-question:after{content:"+";position:absolute;right:8px;font-size:25px;color:var(--blue-700);transition:.25s}.faq-question[aria-expanded=true]:after{content:"−";color:var(--teal)}.faq-answer{display:none;padding:0 45px 22px 0}.faq-answer.open{display:block}.faq-answer p{font-size:15px;margin:0}
    .cta-panel{background:var(--blue-050);border:1px solid #cce4f2;border-radius:var(--radius-lg);padding:42px 48px;display:grid;grid-template-columns:1fr .8fr;gap:45px;align-items:center}.feedback-form{display:grid;grid-template-columns:1fr 1fr;gap:12px}.feedback-form label{font-size:13px;font-weight:700;color:var(--blue-900)}.feedback-form input,.feedback-form select,.feedback-form textarea{width:100%;margin-top:5px;border:1px solid var(--line);border-radius:10px;background:#fff;padding:10px 12px;color:var(--ink)}.feedback-form textarea{min-height:86px;resize:vertical;grid-column:1/-1}.feedback-form .form-action{grid-column:1/-1;display:flex;gap:15px;align-items:center}.form-message{font-size:13px;color:var(--teal);display:none}
    .footer{background:var(--blue-950);color:#dceaf3;padding:62px 0 22px}.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr .9fr;gap:40px}.footer .brand{color:#fff;margin-bottom:18px}.footer p{color:#a9c0d1;font-size:14px;max-width:330px}.footer h3{font-size:15px;color:#fff;margin-bottom:15px}.footer-grid>div>a:not(.brand){display:block;color:#b8ccda;font-size:14px;padding:4px 0}.footer-grid>div>a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.16);margin-top:42px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#9db5c6;font-size:12px}.footer-bottom a:hover{color:#fff}
    .top-link{position:fixed;right:22px;bottom:22px;width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--blue-800);color:#fff;box-shadow:var(--shadow-sm);z-index:20}
    @media(max-width:1024px){.nav-group{gap:13px}.nav-link{font-size:13px}.hero-grid,.trend-layout{gap:35px}.scenario-grid{grid-template-columns:1fr 1fr}.scenario-card.feature{grid-row:span 2}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}}
    @media(max-width:768px){.container{width:min(100% - 32px,620px)}.section{padding:70px 0}.nav-shell{height:70px;grid-template-columns:43px 1fr 43px}.brand{justify-self:center;font-size:20px}.nav-group{display:none}.menu-toggle{display:block}.menu-toggle--right{justify-self:end}.nav-shell.menu-open .nav-group{display:flex;position:absolute;top:70px;left:16px;right:16px;background:#fff;border:1px solid var(--line);border-radius:0 0 15px 15px;padding:18px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:3px}.nav-shell.menu-open .nav-group--right{top:310px}.nav-shell.menu-open .nav-link{padding:10px 12px}.hero{padding:35px 0 52px}.hero-grid,.trend-layout,.split-content,.split-content.reverse,.method-layout,.feature-photo,.cta-panel{grid-template-columns:1fr}.split-content.reverse .split-image{order:0}.hero-stage{min-height:370px}.metric-band{grid-template-columns:1fr 1fr}.metric:nth-child(2){border-right:0}.metric:nth-child(-n+2){border-bottom:1px solid var(--line)}.scenario-grid{grid-template-columns:1fr}.scenario-card.feature{grid-row:auto}.method-list{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-bottom{display:block}.footer-bottom>div+div{margin-top:10px}}
    @media(max-width:520px){h1{font-size:37px}.hero-lead{font-size:17px}.hero-actions .btn{width:100%}.hero-actions .btn-text{width:auto}.hero-stage{padding:12px;min-height:340px}.hero-image{height:275px}.data-card--top{right:-3px;width:165px;padding:12px}.data-card--bottom{left:-3px;width:180px;padding:12px}.data-card b{font-size:22px}.metric{padding:20px 16px}.metric strong{font-size:24px}.section-heading p{font-size:16px}.chart-card{padding:20px}.scenario-card{min-height:auto}.cta-panel{padding:28px 20px}.feedback-form{grid-template-columns:1fr}.feedback-form textarea,.feedback-form .form-action{grid-column:auto}.footer-grid{grid-template-columns:1fr}.footer{padding-top:46px}}

/* roulang page: category1 */
:root{
      --blue-950:#102e4d;--blue-900:#173f68;--blue-800:#20598c;--blue-700:#2875b5;--blue-500:#4ca3d8;
      --blue-100:#eaf5fc;--blue-050:#f5faff;--teal:#39a99a;--orange:#f09a54;--ink:#172b3d;
      --muted:#647789;--line:#dce8f1;--paper:#fff;--mist:#f3f8fb;
      --shadow:0 18px 45px rgba(29,73,106,.10);--shadow-sm:0 8px 22px rgba(29,73,106,.08);
      --radius-lg:28px;--radius-md:18px;--radius-sm:11px;--max:1240px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;font-size:16px;line-height:1.85;overflow-x:hidden}
    h1,h2,h3,h4,p{margin-top:0} h1,h2,h3,h4{line-height:1.35;color:var(--blue-950);font-weight:900}
    h1{font-size:clamp(36px,5vw,66px);letter-spacing:-.055em;margin-bottom:20px}
    h2{font-size:clamp(28px,3.5vw,43px);letter-spacing:-.035em;margin-bottom:16px}
    h3{font-size:21px;margin-bottom:10px} p{color:var(--muted)}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{max-width:100%;height:auto;display:block}
    button,input,select,textarea{font:inherit}
    button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(76,163,216,.35);outline-offset:3px}
    .container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
    .section{padding:98px 0;position:relative}.section--soft{background:var(--mist)}.section--blue{background:var(--blue-050)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-700);font-size:13px;font-weight:800;letter-spacing:.12em;margin-bottom:16px}
    .eyebrow:before{content:"";width:25px;height:2px;background:var(--teal);display:inline-block}
    .section-heading{max-width:730px;margin-bottom:43px}.section-heading p{font-size:18px;line-height:1.9;margin-bottom:0}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 4px 20px rgba(24,65,96,.05)}
    .nav-shell{height:82px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px}
    .nav-group{display:flex;align-items:center;gap:22px}.nav-group--right{justify-content:flex-end}
    .nav-link{position:relative;color:#526b7d;font-size:14px;font-weight:700;padding:9px 0;white-space:nowrap}
    .nav-link:hover{color:var(--blue-800)}.nav-link.active{color:var(--blue-950)}
    .nav-link.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;border-radius:3px;background:var(--teal)}
    .brand{display:flex;align-items:center;gap:10px;color:var(--blue-950);font-size:23px;font-weight:900;letter-spacing:-.06em;white-space:nowrap}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue-800);position:relative;overflow:hidden}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;border-radius:50%;border:2px solid #9bd8e1}
    .brand-mark:before{width:25px;height:25px;left:-7px;top:12px}.brand-mark:after{width:18px;height:18px;right:-4px;top:-5px;border-color:#fff}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--blue-900);border-radius:10px;width:43px;height:40px;font-size:21px}
    .hero{padding:76px 0 82px;background:#f6fbfe;position:relative;overflow:hidden}
    .hero:after{content:"";position:absolute;width:500px;height:500px;border-radius:50%;right:-180px;top:20px;background:rgba(76,163,216,.08)}
    .hero-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:65px;align-items:center;position:relative;z-index:1}
    .hero-lead{font-size:19px;line-height:1.95;max-width:610px;margin:24px 0 30px}
    .hero-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}.hero-note{display:flex;gap:25px;margin-top:34px;color:var(--muted);font-size:13px}
    .hero-note strong{color:var(--blue-900);font-size:24px;display:block;line-height:1.2}.hero-note span{display:block}
    .hero-visual{position:relative;min-height:430px;padding:25px}.hero-image{height:390px;width:100%;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
    .hero-image-wrap{position:relative}.hero-image-wrap:after{content:"";position:absolute;inset:0;border-radius:var(--radius-lg);background:linear-gradient(180deg,transparent 40%,rgba(13,45,76,.68))}
    .hero-caption{position:absolute;z-index:2;bottom:28px;left:30px;right:30px;color:#fff}.hero-caption strong{font-size:24px;display:block}.hero-caption p{color:#e8f4fa;margin:6px 0 0;font-size:14px}
    .data-card{position:absolute;background:#fff;border:1px solid var(--line);border-radius:17px;padding:18px;box-shadow:var(--shadow-sm);z-index:3}
    .data-card--top{top:0;right:0;width:205px}.data-card--bottom{left:0;bottom:0;width:220px}.data-card small{color:var(--muted);display:block;font-size:12px}.data-card b{font-size:27px;color:var(--blue-950);line-height:1.35}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:50px;padding:12px 24px;border-radius:12px;border:1px solid transparent;font-weight:800;font-size:15px;cursor:pointer;transition:.25s ease}
    .btn:hover{transform:translateY(-2px)}.btn-primary{background:var(--blue-800);color:#fff;box-shadow:0 10px 20px rgba(32,89,140,.22)}.btn-primary:hover{background:var(--blue-950)}
    .btn-light{background:#fff;color:var(--blue-800);border-color:var(--line);box-shadow:var(--shadow-sm)}.btn-light:hover{border-color:var(--blue-500);background:var(--blue-050)}
    .btn-text{padding:8px 0;min-height:auto;color:var(--blue-800);border-bottom:1px solid var(--blue-500);border-radius:0}
    .tag{display:inline-flex;align-items:center;padding:5px 10px;border-radius:100px;background:var(--blue-100);color:var(--blue-800);font-size:12px;font-weight:800}.tag--green{background:#e8f7f3;color:#187568}.tag--orange{background:#fff2e6;color:#a85c20}
    .crumbs{padding:20px 0;color:var(--muted);font-size:13px;border-bottom:1px solid var(--line)}.crumbs a:hover{color:var(--blue-700)}
    .index-layout{display:grid;grid-template-columns:280px 1fr;gap:62px}.index-aside{position:sticky;top:110px;height:max-content}
    .index-aside ul{list-style:none;margin:18px 0;padding:0;border-left:2px solid var(--line)}.index-aside li a{display:block;padding:12px 18px;color:var(--muted);font-weight:700}.index-aside li a:hover,.index-aside li a.active{color:var(--blue-800);background:var(--blue-050);border-left:3px solid var(--teal);margin-left:-2px}
    .feature{display:grid;grid-template-columns:1fr 1fr;gap:30px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);margin-bottom:50px}.feature img{height:100%;min-height:310px;width:100%;object-fit:cover}.feature-copy{padding:36px}.feature-copy p{line-height:1.9}.feature-copy .tag{margin-bottom:18px}
    .content-list{border-top:1px solid var(--line)}.content-item{display:grid;grid-template-columns:54px 110px 1fr auto;gap:19px;align-items:start;padding:24px 0;border-bottom:1px solid var(--line);transition:.25s ease}.content-item:hover{padding-left:10px;background:#fbfdff}
    .content-number{font-size:23px;color:var(--blue-500);font-weight:900}.content-date{font-size:13px;color:var(--muted);padding-top:5px}.content-item h3{margin:0 0 6px;font-size:19px}.content-item p{font-size:14px;margin:0;line-height:1.75}.content-item .btn-text{font-size:13px;white-space:nowrap;margin-top:5px}
    .split-block{display:grid;grid-template-columns:7fr 5fr;gap:76px;align-items:start}.split-block.reverse{grid-template-columns:5fr 7fr}.split-block.reverse .split-copy{order:2}
    .split-copy p{line-height:1.95}.check-list{list-style:none;padding:0;margin:25px 0}.check-list li{position:relative;padding:10px 0 10px 30px;border-bottom:1px solid var(--line);color:var(--ink)}.check-list li:before{content:"✓";position:absolute;left:0;top:9px;color:var(--teal);font-weight:900}
    .image-card{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);background:#fff}.image-card img{width:100%;height:350px;object-fit:cover}.image-card figcaption{padding:18px 22px;color:var(--muted);font-size:13px}
    .topic-band{background:var(--blue-900);color:#fff;border-radius:var(--radius-lg);padding:44px 48px;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}.topic-band h2,.topic-band h3{color:#fff}.topic-band p{color:#d9eaf4}.topic-points{display:grid;grid-template-columns:1fr 1fr;gap:14px}.topic-point{padding:17px;border:1px solid rgba(255,255,255,.2);border-radius:13px}.topic-point strong{display:block;color:#fff}.topic-point span{font-size:13px;color:#bdd6e5}
    .metric-row{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden}.metric{background:#fff;padding:27px}.metric b{font-size:34px;color:var(--blue-800);display:block}.metric span{color:var(--muted);font-size:14px}
    .tag-panel{display:flex;gap:12px;flex-wrap:wrap;padding:25px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md)}
    .faq-list{max-width:900px}.faq-item{border-bottom:1px solid var(--line)}.faq-question{width:100%;border:0;background:none;text-align:left;padding:22px 42px 22px 0;font-weight:800;color:var(--blue-950);position:relative;cursor:pointer}.faq-question:after{content:"+";position:absolute;right:7px;font-size:25px;color:var(--blue-700)}.faq-item.open .faq-question:after{content:"−"}.faq-answer{display:none;padding:0 40px 21px 0}.faq-item.open .faq-answer{display:block}.faq-answer p{margin:0;font-size:15px}
    .cta-panel{background:var(--blue-050);border:1px solid #cfe5f1;border-radius:var(--radius-lg);padding:45px 50px;display:grid;grid-template-columns:1.1fr .9fr;gap:45px;align-items:center}.cta-panel h2{margin-bottom:12px}.form-box{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--shadow-sm)}.form-box label{font-size:13px;font-weight:800;color:var(--blue-900);display:block;margin-bottom:6px}.form-box input,.form-box select,.form-box textarea{width:100%;border:1px solid var(--line);border-radius:9px;padding:10px 12px;margin-bottom:13px;color:var(--ink);background:#fbfdff}.form-box textarea{min-height:75px;resize:vertical}.form-box small{display:block;color:var(--muted);font-size:12px;margin-top:10px}
    .footer{background:#102e4d;color:#d3e2ec;padding:62px 0 24px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px}.footer .brand{color:#fff;margin-bottom:17px}.footer p{color:#b8cedc;font-size:14px;max-width:320px}.footer h3{font-size:15px;color:#fff;margin-bottom:15px}.footer-grid>div>a:not(.brand){display:block;color:#b8cedc;font-size:14px;padding:4px 0}.footer-grid>div>a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.16);margin-top:44px;padding-top:20px;display:flex;justify-content:space-between;gap:20px;color:#a9c0cf;font-size:12px}.footer-bottom a{color:#d8eaf3}
    .back-top{position:fixed;right:22px;bottom:22px;width:42px;height:42px;border:1px solid var(--line);border-radius:50%;background:#fff;color:var(--blue-800);box-shadow:var(--shadow-sm);cursor:pointer}
    @media(max-width:1024px){.nav-group{gap:13px}.nav-link{font-size:13px}.hero-grid{gap:35px}.index-layout{gap:35px}.split-block{gap:40px}}
    @media(max-width:768px){.container{width:min(100% - 32px,var(--max))}.nav-shell{height:68px;grid-template-columns:43px 1fr 43px;gap:8px}.brand{justify-content:center;font-size:20px}.nav-group{display:none}.menu-toggle{display:block}.menu-toggle--left{justify-self:start}.menu-toggle--right{justify-self:end}.site-header.menu-open .nav-group{display:flex;position:absolute;top:68px;left:16px;right:16px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:3px}.site-header.menu-open .nav-group--right{top:310px}.site-header.menu-open .nav-link{padding:10px 12px}.hero{padding:55px 0}.hero-grid,.feature,.split-block,.split-block.reverse,.topic-band,.cta-panel{grid-template-columns:1fr}.hero-visual{min-height:370px;padding:15px}.hero-image{height:320px}.data-card--top{right:-2px}.data-card--bottom{left:-2px}.index-layout{grid-template-columns:1fr}.index-aside{position:static}.index-aside ul{display:flex;overflow:auto;border-left:0;border-bottom:1px solid var(--line);gap:5px}.index-aside li a{white-space:nowrap}.content-item{grid-template-columns:40px 95px 1fr}.content-item .btn-text{grid-column:3}.metric-row{grid-template-columns:1fr 1fr}.split-block.reverse .split-copy{order:0}.footer-grid{grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column}.topic-band{padding:32px 25px}}
    @media(max-width:520px){h1{font-size:36px}.hero-lead{font-size:17px}.hero-actions .btn{width:100%}.hero-note{gap:15px}.hero-visual{min-height:345px}.hero-image{height:290px}.data-card{padding:13px}.data-card--top{width:165px}.data-card--bottom{width:175px}.feature-copy{padding:25px}.content-item{grid-template-columns:35px 1fr}.content-date{grid-column:2}.content-item h3,.content-item p{grid-column:2}.content-item .btn-text{grid-column:2}.metric{padding:19px}.metric b{font-size:27px}.topic-points{grid-template-columns:1fr}.cta-panel{padding:30px 22px}.footer-grid{grid-template-columns:1fr}.section{padding:72px 0}}

/* roulang page: category6 */
:root{
      --blue-950:#102e4d;--blue-900:#173f68;--blue-800:#20598c;--blue-700:#2875b5;
      --blue-500:#4ca3d8;--blue-100:#eaf5fc;--blue-050:#f5faff;--teal:#39a99a;
      --orange:#f09a54;--ink:#172b3d;--muted:#647789;--line:#dce8f1;--paper:#fff;
      --mist:#f3f8fb;--danger:#b65c5c;--shadow:0 18px 45px rgba(29,73,106,.10);
      --shadow-sm:0 8px 22px rgba(29,73,106,.08);--radius-lg:28px;--radius-md:18px;
      --radius-sm:11px;--max:1240px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;font-size:16px;line-height:1.85;overflow-x:hidden}
    img{display:block;max-width:100%;height:auto}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    button,input,textarea,select{font:inherit}
    button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(76,163,216,.4);outline-offset:3px}
    h1,h2,h3,h4,p{margin-top:0}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.18;letter-spacing:-.045em;margin-bottom:0}
    h2{font-size:clamp(28px,3.3vw,44px);line-height:1.3;letter-spacing:-.03em;margin-bottom:16px}
    h3{font-size:21px;line-height:1.45;margin-bottom:8px}
    .container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
    .wide-container{width:min(1380px,calc(100% - 48px));margin:0 auto}
    .section{padding:96px 0;position:relative}
    .section--soft{background:var(--mist)}
    .section--blue{background:var(--blue-050)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-700);font-size:13px;font-weight:800;letter-spacing:.12em;margin-bottom:15px}
    .eyebrow:before{content:"";width:25px;height:2px;background:var(--teal)}
    .section-heading{max-width:750px;margin-bottom:42px}
    .section-heading p{font-size:18px;line-height:1.9;color:var(--muted);margin-bottom:0}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:50px;padding:12px 24px;border-radius:12px;border:1px solid transparent;font-weight:800;font-size:15px;cursor:pointer;transition:transform .25s,box-shadow .25s,background .25s,border-color .25s}
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:var(--blue-800);color:#fff;box-shadow:0 10px 20px rgba(32,89,140,.22)}
    .btn-primary:hover{background:var(--blue-950);box-shadow:0 14px 28px rgba(32,89,140,.28)}
    .btn-light{background:#fff;color:var(--blue-800);border-color:var(--line);box-shadow:var(--shadow-sm)}
    .btn-light:hover{border-color:var(--blue-500);background:var(--blue-050)}
    .btn-text{padding:9px 0;min-height:auto;color:var(--blue-800);border-bottom:1px solid var(--blue-500);border-radius:0}
    .tag{display:inline-flex;align-items:center;padding:5px 10px;border-radius:100px;background:var(--blue-100);color:var(--blue-800);font-size:12px;font-weight:800}
    .tag--green{background:#e8f7f3;color:#187568}.tag--orange{background:#fff2e6;color:#a85c20}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 4px 20px rgba(24,65,96,.05)}
    .nav-shell{height:82px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px}
    .nav-group{display:flex;align-items:center;gap:22px}.nav-group--right{justify-content:flex-end}
    .nav-link{position:relative;color:#526b7d;font-size:14px;font-weight:700;padding:9px 0;white-space:nowrap}
    .nav-link:hover{color:var(--blue-800)}.nav-link.active{color:var(--blue-950)}
    .nav-link.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;border-radius:3px;background:var(--teal)}
    .brand{display:flex;align-items:center;gap:10px;color:var(--blue-950);font-size:23px;font-weight:900;letter-spacing:-.06em;white-space:nowrap}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue-800);position:relative;overflow:hidden}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;border-radius:50%;border:2px solid #9bd8e1}
    .brand-mark:before{width:25px;height:25px;left:-7px;top:12px}.brand-mark:after{width:18px;height:18px;right:-4px;top:-5px;border-color:#fff}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--blue-900);border-radius:10px;width:43px;height:40px;font-size:21px}
    .hero{padding:34px 0 76px;background:linear-gradient(180deg,#f6fbfe 0%,#fff 100%);position:relative}
    .breadcrumb{font-size:13px;color:var(--muted);margin-bottom:28px}.breadcrumb a{color:var(--blue-700)}
    .hero-banner{display:grid;grid-template-columns:1.05fr .95fr;gap:55px;align-items:center;padding:38px 0}
    .hero-copy{max-width:680px}.hero-copy h1 span{color:var(--blue-700)}
    .hero-lead{font-size:19px;line-height:1.9;color:var(--muted);max-width:650px;margin:24px 0 29px}
    .hero-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
    .hero-visual{position:relative;padding:18px 0 22px 20px}.hero-visual img{height:365px;width:100%;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
    .visual-label{position:absolute;left:0;bottom:0;background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px 20px;box-shadow:var(--shadow-sm);max-width:245px}
    .visual-label strong{display:block;color:var(--blue-950);font-size:19px}.visual-label span{font-size:13px;color:var(--muted)}
    .metric-band{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden}
    .metric{background:#fff;padding:25px 26px}.metric b{display:block;color:var(--blue-950);font-size:29px;line-height:1.3}.metric span{color:var(--muted);font-size:13px}
    .case-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:28px;align-items:stretch}
    .case-main{background:var(--blue-900);color:#fff;border-radius:var(--radius-lg);padding:42px;display:grid;grid-template-columns:1fr .83fr;gap:35px;min-height:400px}
    .case-main h2{color:#fff}.case-main p{color:#dcecf5}.case-main img{height:250px;width:100%;object-fit:cover;border-radius:17px;margin-top:8px}
    .case-side{display:flex;flex-direction:column;gap:18px}.case-side article{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:26px;box-shadow:var(--shadow-sm);flex:1}
    .case-side p,.case-main p{color:var(--muted);font-size:15px}.case-main .tag{background:rgba(255,255,255,.16);color:#dff8f5}
    .story-section{background:var(--mist)}
    .story-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:68px;align-items:start}
    .story-grid img{height:435px;width:100%;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
    .story-copy{padding-top:12px}.story-copy p{color:var(--muted);font-size:16px}
    .node-list{border-left:2px solid #b9dce5;margin:28px 0 0 8px}.node{position:relative;padding:0 0 25px 28px}.node:last-child{padding-bottom:0}
    .node:before{content:"";position:absolute;left:-8px;top:8px;width:14px;height:14px;background:var(--teal);border:4px solid var(--mist);border-radius:50%}
    .node strong{color:var(--blue-900);display:block;margin-bottom:3px}.node p{font-size:14px;margin-bottom:0}
    .result-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:58px;align-items:center}.result-copy p{color:var(--muted)}
    .result-board{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:31px;box-shadow:var(--shadow-sm)}
    .result-row{display:grid;grid-template-columns:145px 1fr 70px;gap:16px;align-items:center;padding:18px 0;border-bottom:1px solid var(--line);font-size:14px}.result-row:last-child{border-bottom:0}
    .bar{height:9px;background:#e6f0f5;border-radius:20px;overflow:hidden}.bar i{height:100%;display:block;background:var(--teal);border-radius:20px}.result-row b{color:var(--blue-800);text-align:right}
    .quote-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:stretch}.quote-feature{background:var(--blue-050);border-radius:var(--radius-lg);padding:45px;border:1px solid #d6eaf5}
    .quote-mark{font-size:56px;line-height:1;color:var(--teal);font-weight:900}.quote-feature blockquote{font-size:25px;line-height:1.65;font-weight:700;color:var(--blue-950);margin:5px 0 26px}
    .quote-author{font-size:14px;color:var(--muted)}.quote-list{display:flex;flex-direction:column;gap:15px}.quote-list article{padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-sm)}.quote-list p{font-size:15px;color:var(--muted);margin-bottom:8px}
    .detail-section{padding-top:80px}.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}.detail-card{padding:31px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md)}.detail-card h3{color:var(--blue-900)}.detail-card p{color:var(--muted);font-size:15px}.check-list{padding:0;margin:14px 0 0;list-style:none}.check-list li{padding:9px 0 9px 27px;position:relative;color:var(--muted);font-size:14px}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:900}
    .feedback-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:50px;align-items:start}.feedback-intro p{color:var(--muted)}.feedback-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:34px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.field{margin-bottom:17px}.field label{display:block;color:var(--blue-950);font-size:14px;font-weight:800;margin-bottom:7px}.field input,.field select,.field textarea{width:100%;border:1px solid var(--line);border-radius:10px;background:#fbfdfe;padding:11px 13px;color:var(--ink);min-height:47px}.field textarea{min-height:118px;resize:vertical}.field input::placeholder,.field textarea::placeholder{color:#9aabb7}.form-message{font-size:13px;color:var(--teal);margin:12px 0 0;display:none}
    .faq-list{max-width:900px}.faq-item{border-top:1px solid var(--line)}.faq-item:last-child{border-bottom:1px solid var(--line)}.faq-question{width:100%;display:flex;justify-content:space-between;gap:20px;text-align:left;border:0;background:none;padding:22px 3px;color:var(--blue-950);font-weight:800;cursor:pointer}.faq-question span:last-child{font-size:24px;color:var(--teal);line-height:1}.faq-answer{display:none;padding:0 42px 22px 3px;color:var(--muted);font-size:15px}.faq-item.open .faq-answer{display:block}.faq-item.open .faq-question{color:var(--blue-700)}
    .cta-panel{background:var(--blue-100);border:1px solid #cde5f1;border-radius:var(--radius-lg);padding:48px 54px;display:grid;grid-template-columns:1fr auto;gap:35px;align-items:center;position:relative;overflow:hidden}.cta-panel:after{content:"";position:absolute;width:230px;height:230px;border:1px solid rgba(57,169,154,.28);border-radius:50%;right:-55px;top:-100px}.cta-panel p{color:var(--muted);max-width:680px;margin-bottom:0}.cta-actions{display:flex;gap:15px;flex-wrap:wrap;position:relative;z-index:1}
    .footer{background:var(--blue-950);color:#d4e3ed;padding:66px 0 24px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}.footer .brand{color:#fff;margin-bottom:19px}.footer p{color:#aac0ce;font-size:14px;max-width:315px}.footer h3{font-size:15px;color:#fff;margin-bottom:16px}.footer-grid>div>a:not(.brand){display:block;color:#aac0ce;font-size:14px;margin:8px 0}.footer-grid>div>a:hover,.footer-bottom a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.16);margin-top:42px;padding-top:22px;display:flex;justify-content:space-between;gap:20px;color:#93adbd;font-size:12px}.footer-bottom a{color:#b9d3df}
    .backtop{position:fixed;right:22px;bottom:22px;width:43px;height:43px;border:1px solid var(--line);border-radius:50%;background:#fff;color:var(--blue-800);box-shadow:var(--shadow-sm);cursor:pointer;z-index:20}
    @media(max-width:1024px){.nav-group{gap:13px}.nav-link{font-size:13px}.hero-banner,.case-grid,.result-layout,.feedback-wrap{grid-template-columns:1fr}.hero-visual{max-width:700px}.case-main{grid-template-columns:1fr}.case-main img{height:260px}.story-grid{gap:35px}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}.footer-grid>div:last-child{grid-column:2}}
    @media(max-width:768px){.container,.wide-container{width:min(100% - 32px,var(--max))}.nav-shell{height:70px;grid-template-columns:44px 1fr 44px;gap:8px}.nav-group{display:none;position:absolute;top:70px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:18px;border-radius:0 0 16px 16px;flex-direction:column;align-items:stretch;gap:4px}.nav-group--left{left:16px;right:50%;margin-right:5px}.nav-group--right{right:16px;left:50%;margin-left:5px}.nav-group.is-open{display:flex}.menu-toggle{display:block}.menu-toggle--right{justify-self:end}.brand{justify-self:center;font-size:20px}.section{padding:70px 0}.hero{padding:25px 0 55px}.hero-banner{padding:20px 0;gap:30px}.hero-copy h1{font-size:42px}.hero-lead{font-size:17px}.hero-visual{padding:10px 0 25px}.hero-visual img{height:300px}.metric-band{grid-template-columns:1fr 1fr}.metric{padding:19px}.case-main{padding:29px}.story-grid img{height:300px}.detail-grid,.form-grid,.quote-layout{grid-template-columns:1fr}.cta-panel{grid-template-columns:1fr;padding:32px 25px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:last-child{grid-column:auto}.footer-bottom{display:block}.footer-bottom div+div{margin-top:10px}}
    @media(max-width:520px){.hero-copy h1{font-size:36px}.hero-actions,.cta-actions{align-items:stretch;flex-direction:column}.hero-actions .btn,.cta-actions .btn{width:100%}.metric-band{grid-template-columns:1fr 1fr}.metric b{font-size:23px}.case-main{padding:24px}.quote-feature{padding:29px}.quote-feature blockquote{font-size:21px}.result-row{grid-template-columns:105px 1fr 52px;gap:9px;font-size:12px}.feedback-form{padding:23px}.footer-grid{grid-template-columns:1fr}.footer-grid>div:last-child{grid-column:auto}}

/* roulang page: category5 */
:root{
 --blue-950:#102e4d;--blue-900:#173f68;--blue-800:#20598c;--blue-700:#2875b5;--blue-500:#4ca3d8;
 --blue-100:#eaf5fc;--blue-050:#f5faff;--teal:#39a99a;--orange:#f09a54;--ink:#172b3d;
 --muted:#647789;--line:#dce8f1;--paper:#fff;--mist:#f3f8fb;
 --shadow:0 18px 45px rgba(29,73,106,.10);--shadow-sm:0 8px 22px rgba(29,73,106,.08);
 --radius-lg:28px;--radius-md:18px;--radius-sm:11px;--max:1240px
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;font-size:16px;line-height:1.85;overflow-x:hidden}
h1,h2,h3,h4,p{margin-top:0}h1{font-size:clamp(38px,5vw,68px);line-height:1.18;letter-spacing:-.055em;margin-bottom:20px}h2{font-size:clamp(28px,3.4vw,44px);line-height:1.3;letter-spacing:-.035em;margin-bottom:15px}h3{font-size:21px;line-height:1.45;margin-bottom:8px}
img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none;transition:.25s ease}button,input,select,textarea{font:inherit}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(76,163,216,.35);outline-offset:3px}
.container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
.section{padding:92px 0;position:relative}.section--soft{background:var(--mist)}.section--blue{background:var(--blue-050)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-700);font-size:13px;font-weight:800;letter-spacing:.12em;margin-bottom:15px}.eyebrow:before{content:"";width:25px;height:2px;background:var(--teal)}
.section-heading{max-width:730px;margin-bottom:38px}.section-heading p{font-size:18px;line-height:1.9;color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:50px;padding:11px 24px;border-radius:12px;border:1px solid transparent;font-weight:800;font-size:15px;cursor:pointer;transition:.25s ease}
.btn:hover{transform:translateY(-2px)}.btn-primary{background:var(--blue-800);color:#fff;box-shadow:0 10px 20px rgba(32,89,140,.22)}.btn-primary:hover{background:var(--blue-950);box-shadow:0 14px 28px rgba(32,89,140,.28)}.btn-light{background:#fff;color:var(--blue-800);border-color:var(--line);box-shadow:var(--shadow-sm)}.btn-light:hover{border-color:var(--blue-500);background:var(--blue-050)}.btn-text{padding:8px 0;min-height:auto;color:var(--blue-800);border-bottom:1px solid var(--blue-500);border-radius:0}
.tag{display:inline-flex;align-items:center;padding:5px 10px;border-radius:100px;background:var(--blue-100);color:var(--blue-800);font-size:12px;font-weight:800}.tag--green{background:#e8f7f3;color:#187568}.tag--orange{background:#fff2e6;color:#a85c20}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 4px 20px rgba(24,65,96,.05)}
.nav-shell{height:82px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px}.nav-group{display:flex;align-items:center;gap:22px}.nav-group--right{justify-content:flex-end}.nav-link{position:relative;color:#526b7d;font-size:14px;font-weight:700;padding:9px 0;white-space:nowrap}.nav-link:hover{color:var(--blue-800)}.nav-link.active{color:var(--blue-950)}.nav-link.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;border-radius:3px;background:var(--teal)}
.brand{display:flex;align-items:center;gap:10px;color:var(--blue-950);font-size:23px;font-weight:900;letter-spacing:-.06em;white-space:nowrap}.brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue-800);position:relative;overflow:hidden}.brand-mark:before,.brand-mark:after{content:"";position:absolute;border-radius:50%;border:2px solid #9bd8e1}.brand-mark:before{width:25px;height:25px;left:-7px;top:12px}.brand-mark:after{width:18px;height:18px;right:-4px;top:-5px;border-color:#fff}
.menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--blue-900);border-radius:10px;width:43px;height:40px;font-size:21px}
.hero{padding:72px 0 70px;background:linear-gradient(180deg,#f6fbfe,#fff);position:relative;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1fr .82fr;gap:70px;align-items:center}.hero-copy{max-width:680px}.hero-copy h1 span{color:var(--blue-700)}.hero-lead{font-size:19px;color:var(--muted);line-height:1.9;max-width:640px;margin:24px 0 29px}.hero-actions{display:flex;gap:18px;align-items:center;flex-wrap:wrap}.hero-art{position:relative}.hero-art img{height:365px;width:100%;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}.hero-art figcaption{position:absolute;left:25px;bottom:22px;color:#fff;font-weight:800;font-size:18px;text-shadow:0 2px 10px #173f68}.float-badge{position:absolute;right:-18px;top:-20px;background:#fff;padding:17px 20px;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-sm)}.float-badge b{display:block;font-size:26px;color:var(--blue-950);line-height:1.2}.float-badge small{color:var(--muted)}
.breadcrumb{padding:20px 0;color:var(--muted);font-size:13px}.breadcrumb a:hover{color:var(--blue-700)}
.search-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-sm)}.search-row{display:grid;grid-template-columns:1fr 170px 140px;gap:13px}.field{width:100%;height:50px;border:1px solid var(--line);border-radius:11px;background:#fbfdff;padding:0 15px;color:var(--ink)}.field:focus{border-color:var(--blue-500);background:#fff;box-shadow:0 0 0 4px rgba(76,163,216,.1)}
.filter-line{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:20px}.filter-btn{border:1px solid var(--line);background:#fff;color:var(--muted);padding:8px 15px;border-radius:30px;cursor:pointer;font-size:13px}.filter-btn:hover,.filter-btn.active{background:var(--blue-100);border-color:#a8d5eb;color:var(--blue-800);font-weight:800}
.result-layout{display:grid;grid-template-columns:1.5fr .72fr;gap:48px}.result-head{display:flex;justify-content:space-between;align-items:end;border-bottom:1px solid var(--line);padding-bottom:17px;margin-bottom:4px}.result-head p{margin:0;color:var(--muted);font-size:14px}.result-item{display:grid;grid-template-columns:92px 1fr;gap:22px;padding:27px 0;border-bottom:1px solid var(--line);transition:.25s ease}.result-item:hover{padding-left:10px;background:linear-gradient(90deg,var(--blue-050),transparent)}.result-date{color:var(--blue-700);font-weight:800;font-size:14px;padding-top:5px}.result-item h3{margin:10px 0 7px}.result-item p{color:var(--muted);font-size:14px;line-height:1.8;margin-bottom:9px}.result-meta{display:flex;gap:9px;align-items:center;flex-wrap:wrap}.side-card{padding:25px;background:var(--blue-950);color:#fff;border-radius:var(--radius-md);box-shadow:var(--shadow);height:max-content}.side-card p{color:#c8dbe9;font-size:14px;line-height:1.85}.side-card ul{padding-left:20px;color:#e6f2f8;font-size:14px}.side-card li{margin:9px 0}.side-image{margin-top:22px;border-radius:14px;height:175px;object-fit:cover;width:100%}
.feature-section{display:grid;grid-template-columns:.9fr 1.1fr;gap:55px;align-items:center}.feature-section img{height:340px;width:100%;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}.feature-copy p{color:var(--muted);line-height:1.95}.check-list{padding:0;margin:20px 0;list-style:none}.check-list li{padding:10px 0 10px 28px;border-bottom:1px solid var(--line);position:relative}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:900}
.empty-box{text-align:center;border:1px dashed #b9d3e2;border-radius:var(--radius-md);padding:35px;background:#fbfdff;color:var(--muted)}.empty-box strong{display:block;color:var(--blue-900);font-size:20px;margin-bottom:5px}
.pagination{display:flex;gap:8px;justify-content:center;margin-top:32px}.page-btn{width:39px;height:39px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--muted);cursor:pointer}.page-btn:hover,.page-btn.active{background:var(--blue-800);color:#fff;border-color:var(--blue-800)}
.faq-list{max-width:900px}.faq-item{border-bottom:1px solid var(--line)}.faq-question{width:100%;display:flex;justify-content:space-between;text-align:left;border:0;background:none;padding:21px 0;color:var(--ink);font-weight:800;cursor:pointer}.faq-question span:last-child{color:var(--blue-700);font-size:22px}.faq-answer{display:none;padding:0 35px 20px 0;color:var(--muted);line-height:1.9}.faq-item.open .faq-answer{display:block}.faq-item.open .faq-question span:last-child{transform:rotate(45deg)}
.cta-panel{background:var(--blue-050);border:1px solid #cfe4ef;border-radius:var(--radius-lg);padding:45px 52px;display:flex;align-items:center;justify-content:space-between;gap:30px}.cta-panel p{color:var(--muted);max-width:650px;margin:0}.feedback-form{display:grid;grid-template-columns:1fr 1fr;gap:16px}.feedback-form textarea{grid-column:1/-1;min-height:110px;padding:13px 15px;border:1px solid var(--line);border-radius:11px;resize:vertical}.form-note{font-size:13px;color:var(--muted);margin:11px 0 0}
.footer{padding:65px 0 25px;background:var(--blue-950);color:#d7e5ee}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:45px}.footer .brand{color:#fff;margin-bottom:18px}.footer p{color:#b8cbd8;font-size:14px;line-height:1.9}.footer h3{font-size:15px;color:#fff;margin-bottom:14px}.footer-grid>div:not(:first-child) a{display:block;color:#b8cbd8;font-size:14px;padding:4px 0}.footer-grid a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.15);margin-top:42px;padding-top:19px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;color:#9db4c3;font-size:12px}.footer-bottom a{color:#cde2ee}
@media(max-width:1024px){.nav-group{gap:13px}.nav-link{font-size:13px}.hero-grid,.result-layout{gap:35px}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}.footer-grid>div:last-child{grid-column:2}}
@media(max-width:768px){.container{width:min(var(--max),calc(100% - 32px))}.nav-shell{height:70px;grid-template-columns:45px 1fr 45px}.brand{justify-self:center;font-size:20px}.nav-group{display:none;position:absolute;top:70px;left:16px;right:16px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:14px;flex-direction:column;align-items:stretch;gap:3px}.nav-group.show{display:flex}.nav-group--right{justify-content:flex-start}.nav-link{padding:11px 13px}.menu-toggle{display:block}.menu-toggle--left{justify-self:start}.menu-toggle--right{justify-self:end}.hero{padding:54px 0}.hero-grid,.feature-section{grid-template-columns:1fr}.hero-art{margin:15px 9px 0}.hero-art img{height:285px}.float-badge{right:-8px}.search-row{grid-template-columns:1fr}.result-layout{grid-template-columns:1fr}.side-card{order:-1}.section{padding:70px 0}.cta-panel{padding:34px 25px;display:block}.cta-panel .btn{margin-top:22px}.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}
@media(max-width:520px){h1{font-size:38px}.hero-lead{font-size:16px}.hero-actions .btn{width:100%}.result-item{grid-template-columns:1fr;gap:4px}.result-date{padding:0}.feedback-form{grid-template-columns:1fr}.feedback-form textarea{grid-column:auto}.footer-grid{grid-template-columns:1fr}.footer-grid>div:last-child{grid-column:auto}.footer-bottom{display:block}.footer-bottom div+div{margin-top:10px}}

/* roulang page: category7 */
:root{
      --blue-950:#102e4d;
      --blue-900:#173f68;
      --blue-800:#20598c;
      --blue-700:#2875b5;
      --blue-500:#4ca3d8;
      --blue-100:#eaf5fc;
      --blue-050:#f5faff;
      --teal:#39a99a;
      --orange:#f09a54;
      --ink:#172b3d;
      --muted:#647789;
      --line:#dce8f1;
      --paper:#fff;
      --mist:#f3f8fb;
      --shadow:0 18px 45px rgba(29,73,106,.10);
      --shadow-sm:0 8px 22px rgba(29,73,106,.08);
      --radius-lg:28px;
      --radius-md:18px;
      --radius-sm:11px;
      --max:1240px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--paper);
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
      font-size:16px;
      line-height:1.85;
      overflow-x:hidden;
    }
    img{display:block;max-width:100%;height:auto}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    button,input,select,textarea{font:inherit}
    button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
      outline:3px solid rgba(76,163,216,.38);
      outline-offset:3px
    }
    h1,h2,h3,h4,p{margin-top:0}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.15;letter-spacing:-.055em;margin-bottom:0}
    h2{font-size:clamp(30px,3.4vw,46px);line-height:1.25;letter-spacing:-.04em;margin-bottom:16px}
    h3{font-size:21px;line-height:1.4;margin-bottom:9px}
    p{color:var(--muted)}
    .container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
    .wide-container{width:min(1380px,calc(100% - 48px));margin:0 auto}
    .section{padding:96px 0;position:relative}
    .section--soft{background:var(--mist)}
    .section--blue{background:var(--blue-050)}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;color:var(--blue-700);
      font-size:13px;font-weight:800;letter-spacing:.12em;margin-bottom:15px
    }
    .eyebrow::before{content:"";width:25px;height:2px;background:var(--teal);display:inline-block}
    .section-heading{max-width:740px;margin-bottom:42px}
    .section-heading p{font-size:18px;line-height:1.9;margin-bottom:0}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:9px;
      min-height:50px;padding:12px 24px;border-radius:12px;border:1px solid transparent;
      font-weight:800;font-size:15px;cursor:pointer;
      transition:transform .25s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:var(--blue-800);color:#fff;box-shadow:0 10px 20px rgba(32,89,140,.22)}
    .btn-primary:hover{background:var(--blue-950);box-shadow:0 14px 28px rgba(32,89,140,.28)}
    .btn-light{background:#fff;color:var(--blue-800);border-color:var(--line);box-shadow:var(--shadow-sm)}
    .btn-light:hover{border-color:var(--blue-500);background:var(--blue-050)}
    .btn-text{padding:10px 0;min-height:auto;color:var(--blue-800);border-bottom:1px solid var(--blue-500);border-radius:0}
    .tag{
      display:inline-flex;align-items:center;padding:5px 10px;border-radius:100px;
      background:var(--blue-100);color:var(--blue-800);font-size:12px;font-weight:800
    }
    .tag--green{background:#e8f7f3;color:#187568}
    .tag--orange{background:#fff2e6;color:#a85c20}
    .site-header{
      position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);
      border-bottom:1px solid var(--line);box-shadow:0 4px 20px rgba(24,65,96,.05)
    }
    .nav-shell{height:82px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px}
    .nav-group{display:flex;align-items:center;gap:22px}
    .nav-group--right{justify-content:flex-end}
    .nav-link{position:relative;color:#526b7d;font-size:14px;font-weight:700;padding:9px 0;white-space:nowrap}
    .nav-link:hover{color:var(--blue-800)}
    .nav-link.active{color:var(--blue-950);background:var(--blue-100);padding:8px 11px;border-radius:9px}
    .nav-link.active::after{content:"";position:absolute;left:10px;right:10px;bottom:3px;height:3px;border-radius:3px;background:var(--teal)}
    .brand{display:flex;align-items:center;gap:10px;color:var(--blue-950);font-size:23px;font-weight:900;letter-spacing:-.06em;white-space:nowrap}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue-800);position:relative;overflow:hidden}
    .brand-mark::before,.brand-mark::after{content:"";position:absolute;border-radius:50%;border:2px solid #9bd8e1}
    .brand-mark::before{width:25px;height:25px;left:-7px;top:12px}
    .brand-mark::after{width:18px;height:18px;right:-4px;top:-5px;border-color:#fff}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--blue-900);border-radius:10px;width:43px;height:40px;font-size:21px;cursor:pointer}
    .hero{
      padding:76px 0 70px;background:#f5faff;position:relative;overflow:hidden
    }
    .hero::before{content:"";position:absolute;width:520px;height:520px;border:1px solid rgba(76,163,216,.18);border-radius:50%;right:-170px;top:-180px}
    .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:62px;align-items:center;position:relative;z-index:1}
    .breadcrumb{font-size:13px;color:var(--muted);margin-bottom:31px}
    .breadcrumb a{color:var(--blue-800)}
    .hero-copy h1 span{color:var(--blue-700)}
    .hero-lead{font-size:19px;line-height:1.95;max-width:650px;margin:25px 0 30px}
    .hero-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
    .hero-note{display:flex;gap:28px;flex-wrap:wrap;margin-top:34px;color:var(--muted);font-size:13px}
    .hero-note strong{color:var(--blue-950);font-size:24px;display:block;line-height:1.2}
    .hero-note span{display:block;margin-top:5px}
    .dark-panel{
      min-height:475px;padding:30px;border-radius:var(--radius-lg);background:var(--blue-950);
      color:#fff;box-shadow:var(--shadow);position:relative;overflow:hidden
    }
    .dark-panel::after{content:"";position:absolute;width:280px;height:280px;border:1px solid rgba(155,216,225,.25);border-radius:50%;right:-90px;bottom:-100px}
    .panel-top{display:flex;justify-content:space-between;align-items:center;position:relative;z-index:1}
    .panel-top small{color:#aed0e4;letter-spacing:.08em}
    .status-dot{width:9px;height:9px;border-radius:50%;background:#66d0b0;display:inline-block;margin-right:7px}
    .rank-list{margin:30px 0 0;padding:0;list-style:none;position:relative;z-index:1}
    .rank-item{display:grid;grid-template-columns:38px 1fr auto;gap:13px;align-items:center;padding:19px 0;border-bottom:1px solid rgba(255,255,255,.15)}
    .rank-item:last-child{border-bottom:0}
    .rank-no{font-size:24px;font-weight:900;color:#9bd8e1}
    .rank-item strong{display:block;font-size:17px}
    .rank-item small{color:#b4cada}
    .rank-score{font-size:17px;color:#fff;font-weight:800}
    .panel-foot{position:absolute;left:30px;bottom:25px;color:#b4cada;font-size:13px;z-index:1}
    .entry-strip{padding:18px 0;background:#fff;border-bottom:1px solid var(--line)}
    .entry-strip-inner{display:flex;align-items:center;gap:15px;flex-wrap:wrap}
    .entry-strip strong{font-size:14px;color:var(--blue-950);margin-right:5px}
    .entry-link{font-size:13px;color:var(--muted);padding:7px 12px;border:1px solid var(--line);border-radius:100px}
    .entry-link:hover{color:var(--blue-800);border-color:var(--blue-500);background:var(--blue-050)}
    .intro-grid{display:grid;grid-template-columns:5fr 7fr;gap:62px;align-items:start}
    .intro-copy p{font-size:17px;line-height:2;margin-bottom:18px}
    .intro-aside{border-left:3px solid var(--teal);padding:6px 0 6px 25px}
    .intro-aside strong{display:block;color:var(--blue-950);font-size:21px;line-height:1.5;margin-bottom:13px}
    .intro-aside p{margin-bottom:0;font-size:15px}
    .entry-grid{display:grid;grid-template-columns:1.22fr .78fr;gap:22px}
    .entry-card{border:1px solid var(--line);background:#fff;border-radius:var(--radius-md);padding:28px;box-shadow:var(--shadow-sm);transition:.25s ease}
    .entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .entry-card--main{grid-row:span 2;display:grid;grid-template-columns:1fr .9fr;gap:25px;align-items:center;padding:25px}
    .entry-card--main img{height:280px;width:100%;object-fit:cover;border-radius:15px}
    .entry-card h3{color:var(--blue-950)}
    .entry-card p{font-size:14px;line-height:1.8}
    .entry-card .btn-text{font-size:14px}
    .entry-mini{display:grid;grid-template-columns:72px 1fr;gap:18px;align-items:start}
    .entry-icon{width:60px;height:60px;border-radius:16px;background:var(--blue-100);color:var(--blue-800);display:grid;place-items:center;font-size:25px;font-weight:900}
    .entry-mini p{margin-bottom:9px}
    .numbered{background:var(--blue-050)}
    .numbered-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .numbered-item{padding:28px 24px;border-right:1px solid var(--line)}
    .numbered-item:last-child{border-right:0}
    .numbered-item b{display:block;font-size:36px;color:var(--blue-700);line-height:1;margin-bottom:17px}
    .numbered-item h3{font-size:18px}
    .numbered-item p{font-size:14px;margin-bottom:0;line-height:1.8}
    .feature-layout{display:grid;grid-template-columns:7fr 5fr;gap:58px;align-items:center}
    .feature-image{height:380px;width:100%;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
    .feature-copy p{font-size:17px;line-height:1.95}
    .feature-list{list-style:none;padding:0;margin:23px 0 0}
    .feature-list li{padding:13px 0 13px 27px;border-bottom:1px solid var(--line);position:relative;color:var(--muted)}
    .feature-list li::before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:900}
    .trend-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:25px;align-items:stretch}
    .trend-card{background:var(--blue-900);color:#fff;border-radius:var(--radius-md);padding:30px}
    .trend-card p{color:#c7dce9}
    .trend-card strong{font-size:48px;line-height:1;color:#9bd8e1;display:block;margin:18px 0}
    .trend-lines{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:27px 30px}
    .trend-line{display:grid;grid-template-columns:125px 1fr 65px;gap:15px;align-items:center;padding:15px 0;border-bottom:1px solid var(--line);font-size:14px}
    .trend-line:last-child{border-bottom:0}
    .bar{height:8px;background:#e8f0f5;border-radius:99px;overflow:hidden}
    .bar i{display:block;height:100%;background:var(--teal);border-radius:99px}
    .bar i.blue{background:var(--blue-500)}
    .bar i.orange{background:var(--orange)}
    .story{background:var(--blue-950);color:#fff}
    .story-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
    .story p{color:#bed1df;font-size:16px;line-height:1.95}
    .story h2{color:#fff}
    .story-quote{border-left:3px solid var(--orange);padding-left:24px;margin-top:25px;color:#fff;font-size:20px;line-height:1.7}
    .story-image{height:320px;width:100%;object-fit:cover;border-radius:20px;opacity:.9}
    .news-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:25px}
    .news-feature{padding:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm)}
    .news-feature img{height:220px;width:100%;object-fit:cover}
    .news-feature-content{padding:25px}
    .news-feature h3{font-size:25px}
    .news-feature p{font-size:14px}
    .news-list{border-top:1px solid var(--line)}
    .news-item{display:grid;grid-template-columns:90px 1fr auto;gap:20px;align-items:center;padding:19px 0;border-bottom:1px solid var(--line)}
    .news-date{font-size:13px;color:var(--blue-700);font-weight:800}
    .news-item h3{font-size:17px;margin-bottom:5px}
    .news-item p{font-size:13px;line-height:1.7;margin:0}
    .more{font-size:13px;color:var(--blue-800);white-space:nowrap}
    .faq-grid{display:grid;grid-template-columns:.78fr 1.22fr;gap:60px;align-items:start}
    .faq-intro p{font-size:16px;line-height:1.9}
    .accordion{margin:0;border:0;background:transparent}
    .accordion-item{border:1px solid var(--line);border-radius:13px;margin-bottom:11px;overflow:hidden;background:#fff}
    .accordion-title{border:0!important;color:var(--blue-950)!important;font-size:16px;font-weight:800;padding:18px 48px 18px 20px;background:#fff}
    .accordion-title:hover,.accordion-item.is-active .accordion-title{background:var(--blue-050)}
    .accordion-content{border-top:1px solid var(--line);padding:17px 20px;background:#fff;font-size:14px;color:var(--muted);line-height:1.85}
    .feedback-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:50px;align-items:start}
    .feedback-copy p{font-size:16px;line-height:1.9}
    .feedback-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:28px;box-shadow:var(--shadow-sm)}
    .feedback-form label{font-size:13px;color:var(--blue-950);font-weight:800;margin-bottom:7px}
    .feedback-form input,.feedback-form select,.feedback-form textarea{border:1px solid var(--line);border-radius:10px;box-shadow:none;color:var(--ink);background:#fbfdfe;margin-bottom:17px}
    .feedback-form input:focus,.feedback-form select:focus,.feedback-form textarea:focus{border-color:var(--blue-500);background:#fff;box-shadow:0 0 0 3px rgba(76,163,216,.12)}
    .feedback-form textarea{min-height:110px;resize:vertical}
    .form-note{font-size:12px;color:var(--muted);margin:13px 0 0}
    .cta-panel{background:var(--blue-100);border:1px solid #cce5f3;border-radius:var(--radius-lg);padding:46px 52px;display:grid;grid-template-columns:1fr auto;gap:35px;align-items:center;position:relative;overflow:hidden}
    .cta-panel::after{content:"";position:absolute;width:250px;height:250px;border:1px solid rgba(57,169,154,.25);border-radius:50%;right:-90px;top:-100px}
    .cta-panel h2{color:var(--blue-950);margin-bottom:10px}
    .cta-panel p{margin:0;max-width:700px}
    .cta-actions{display:flex;gap:13px;position:relative;z-index:1;flex-wrap:wrap}
    .footer{padding:65px 0 25px;background:#102e4d;color:#dceaf3}
    .footer .brand{color:#fff;margin-bottom:17px}
    .footer .brand-mark{background:#2875b5}
    .footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr .9fr;gap:42px;padding-bottom:40px}
    .footer p{color:#b5cbd9;font-size:14px;line-height:1.9;max-width:330px}
    .footer h3{color:#fff;font-size:15px;margin-bottom:14px}
    .footer-grid>div>a:not(.brand){display:block;color:#b5cbd9;font-size:13px;margin:7px 0}
    .footer-grid>div>a:not(.brand):hover,.footer-bottom a:hover{color:#fff}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.16);padding-top:20px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;color:#9fb8c8;font-size:12px}
    .footer-bottom a{color:#c8dce8}
    .top-link{position:fixed;right:22px;bottom:22px;width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--blue-800);color:#fff;box-shadow:var(--shadow-sm);z-index:20;font-weight:900}
    @media(max-width:1050px){
      .nav-group{gap:13px}
      .nav-link{font-size:13px}
      .hero-grid,.intro-grid,.feature-layout,.story-grid,.faq-grid,.feedback-grid{gap:35px}
      .entry-card--main{grid-template-columns:1fr}
      .entry-card--main img{height:230px}
    }
    @media(max-width:800px){
      .container,.wide-container{width:min(100% - 34px,var(--max))}
      .nav-shell{height:70px;grid-template-columns:45px 1fr 45px;gap:8px}
      .nav-group{display:none;position:absolute;top:70px;left:17px;right:17px;padding:17px;background:#fff;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:3px}
      .nav-group.is-open{display:flex}
      .nav-group--left{left:17px;right:17px}
      .nav-group--right{left:17px;right:17px}
      .nav-link{padding:12px 14px}
      .nav-link.active{padding:12px 14px}
      .nav-link.active::after{left:14px;right:auto;width:28px;bottom:5px}
      .brand{justify-self:center;font-size:21px}
      .menu-toggle{display:block}
      .menu-toggle--left{justify-self:start}
      .menu-toggle--right{justify-self:end}
      .hero{padding:48px 0 55px}
      .hero-grid,.intro-grid,.feature-layout,.story-grid,.trend-grid,.news-layout,.faq-grid,.feedback-grid{grid-template-columns:1fr}
      .hero-stage{min-height:440px}
      .numbered-grid{grid-template-columns:repeat(2,1fr)}
      .numbered-item:nth-child(2){border-right:0}
      .numbered-item:nth-child(-n+2){border-bottom:1px solid var(--line)}
      .cta-panel{grid-template-columns:1fr;padding:34px 27px}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media(max-width:520px){
      .section{padding:68px 0}
      h1{font-size:40px}
      h2{font-size:31px}
      .hero-lead{font-size:17px}
      .hero-actions .btn{width:100%}
      .hero-stage{padding:15px;min-height:415px}
      .dark-panel{min-height:415px;padding:23px}
      .rank-item{grid-template-columns:30px 1fr auto;padding:16px 0}
      .panel-foot{left:23px}
      .numbered-grid{grid-template-columns:1fr}
      .numbered-item{border-right:0;border-bottom:1px solid var(--line)!important}
      .numbered-item:last-child{border-bottom:0!important}
      .trend-line{grid-template-columns:92px 1fr 45px;gap:8px;font-size:12px}
      .news-item{grid-template-columns:1fr auto;gap:4px 13px}
      .news-date{grid-column:1/-1}
      .footer-grid{grid-template-columns:1fr}
      .footer-bottom{display:block}
      .footer-bottom>div{margin-bottom:10px}
    }

/* roulang page: category4 */
:root{
      --blue-950:#102e4d;
      --blue-900:#173f68;
      --blue-800:#20598c;
      --blue-700:#2875b5;
      --blue-500:#4ca3d8;
      --blue-100:#eaf5fc;
      --blue-050:#f5faff;
      --teal:#39a99a;
      --orange:#f09a54;
      --ink:#172b3d;
      --muted:#647789;
      --line:#dce8f1;
      --paper:#fff;
      --mist:#f3f8fb;
      --success:#187568;
      --warning:#a85c20;
      --shadow:0 18px 45px rgba(29,73,106,.10);
      --shadow-sm:0 8px 22px rgba(29,73,106,.08);
      --radius-lg:28px;
      --radius-md:18px;
      --radius-sm:11px;
      --max:1240px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;color:var(--ink);background:var(--paper);
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
      font-size:16px;line-height:1.85;overflow-x:hidden
    }
    h1,h2,h3,h4,p{margin-top:0}
    h1,h2,h3,h4{color:var(--blue-950);font-weight:850;line-height:1.28;letter-spacing:-.035em}
    h1{font-size:clamp(38px,5vw,68px);margin-bottom:20px}
    h2{font-size:clamp(28px,3.5vw,46px);margin-bottom:16px}
    h3{font-size:21px;margin-bottom:10px}
    p{color:var(--muted)}
    img{max-width:100%;height:auto;display:block}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    button,input,select,textarea{font:inherit}
    button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
      outline:3px solid rgba(76,163,216,.4);outline-offset:3px
    }
    .container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
    .wide-container{width:min(1380px,calc(100% - 48px));margin:0 auto}
    .section{padding:96px 0;position:relative}
    .section--soft{background:var(--mist)}
    .section--blue{background:var(--blue-050)}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;color:var(--blue-700);
      font-size:13px;font-weight:800;letter-spacing:.12em;margin-bottom:16px
    }
    .eyebrow::before{content:"";width:25px;height:2px;background:var(--teal);display:inline-block}
    .section-heading{max-width:720px;margin-bottom:42px}
    .section-heading p{font-size:18px;line-height:1.9;margin-bottom:0}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:50px;
      padding:12px 24px;border-radius:12px;border:1px solid transparent;font-weight:800;
      font-size:15px;cursor:pointer;transition:transform .25s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:var(--blue-800);color:#fff;box-shadow:0 10px 20px rgba(32,89,140,.22)}
    .btn-primary:hover{background:var(--blue-950);box-shadow:0 14px 28px rgba(32,89,140,.28)}
    .btn-light{background:#fff;color:var(--blue-800);border-color:var(--line);box-shadow:var(--shadow-sm)}
    .btn-light:hover{border-color:var(--blue-500);background:var(--blue-050)}
    .btn-text{padding:10px 0;min-height:auto;color:var(--blue-800);border-bottom:1px solid var(--blue-500);border-radius:0}
    .tag{
      display:inline-flex;align-items:center;padding:5px 10px;border-radius:100px;
      background:var(--blue-100);color:var(--blue-800);font-size:12px;font-weight:800
    }
    .tag--green{background:#e8f7f3;color:#187568}
    .tag--orange{background:#fff2e6;color:#a85c20}
    .site-header{
      position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);
      border-bottom:1px solid var(--line);box-shadow:0 4px 20px rgba(24,65,96,.05)
    }
    .nav-shell{height:82px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px}
    .nav-group{display:flex;align-items:center;gap:22px}
    .nav-group--right{justify-content:flex-end}
    .nav-link{position:relative;color:#526b7d;font-size:14px;font-weight:700;padding:9px 0;white-space:nowrap}
    .nav-link:hover{color:var(--blue-800)}
    .nav-link.active{color:var(--blue-950);background:var(--blue-050);padding:9px 11px;border-radius:9px}
    .nav-link.active::after{content:"";position:absolute;left:10px;right:10px;bottom:3px;height:3px;border-radius:3px;background:var(--teal)}
    .brand{display:flex;align-items:center;gap:10px;color:var(--blue-950);font-size:23px;font-weight:900;letter-spacing:-.06em;white-space:nowrap}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue-800);position:relative;overflow:hidden}
    .brand-mark::before,.brand-mark::after{content:"";position:absolute;border-radius:50%;border:2px solid #9bd8e1}
    .brand-mark::before{width:25px;height:25px;left:-7px;top:12px}
    .brand-mark::after{width:18px;height:18px;right:-4px;top:-5px;border-color:#fff}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--blue-900);border-radius:10px;width:43px;height:40px;font-size:21px}
    .breadcrumb-wrap{padding:22px 0 0;background:var(--blue-950)}
    .breadcrumbs{margin:0;color:#b9d4e6;font-size:13px}
    .breadcrumbs a{color:#dcecf6}
    .breadcrumbs a:hover{color:#fff}
    .hero-guide{padding:28px 0 92px;background:var(--blue-950);color:#fff;position:relative;overflow:hidden}
    .hero-guide::before{content:"";position:absolute;width:460px;height:460px;border:1px solid rgba(155,216,225,.2);border-radius:50%;right:-120px;top:-210px}
    .hero-guide::after{content:"";position:absolute;width:280px;height:280px;border:1px solid rgba(155,216,225,.14);border-radius:50%;right:50px;bottom:-170px}
    .hero-guide .container{position:relative;z-index:1}
    .hero-guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
    .hero-guide .eyebrow{color:#9bd8e1}
    .hero-guide h1{color:#fff;max-width:600px}
    .hero-guide h1 span{color:#9bd8e1}
    .hero-guide p{color:#c4d8e5;max-width:610px;font-size:18px}
    .hero-actions{display:flex;gap:18px;align-items:center;flex-wrap:wrap;margin-top:30px}
    .hero-guide .btn-primary{background:var(--teal);box-shadow:0 10px 22px rgba(20,106,101,.25)}
    .hero-guide .btn-primary:hover{background:#2e8f83}
    .hero-guide .btn-light{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.3);color:#fff;box-shadow:none}
    .hero-guide .btn-light:hover{background:rgba(255,255,255,.16)}
    .hero-side{background:#f8fcfe;color:var(--ink);border-radius:24px;padding:25px;box-shadow:0 20px 50px rgba(0,0,0,.2);transform:rotate(1deg)}
    .side-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:10px}
    .side-top strong{color:var(--blue-950);font-size:18px}
    .side-top span{font-size:12px;color:var(--teal);font-weight:800}
    .rank-row{display:grid;grid-template-columns:35px 1fr auto;gap:12px;align-items:center;padding:15px 0;border-bottom:1px solid #edf3f7}
    .rank-row:last-child{border-bottom:0}
    .rank-no{width:28px;height:28px;border-radius:9px;background:var(--blue-100);color:var(--blue-800);display:grid;place-items:center;font-weight:900;font-size:13px}
    .rank-row:nth-child(3) .rank-no{background:#fff0de;color:var(--warning)}
    .rank-row:nth-child(4) .rank-no{background:#e8f7f3;color:var(--success)}
    .rank-name{font-weight:800;color:var(--blue-950);font-size:14px}
    .rank-desc{display:block;font-size:12px;color:var(--muted);margin-top:2px}
    .rank-score{font-size:14px;font-weight:900;color:var(--blue-800)}
    .route-strip{margin-top:-34px;position:relative;z-index:4}
    .route-strip-inner{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-sm);padding:20px 25px;display:flex;justify-content:space-between;gap:18px;align-items:center}
    .route-strip strong{color:var(--blue-950)}
    .route-strip p{margin:0;font-size:14px}
    .route-points{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
    .route-points span{font-size:12px;font-weight:800;color:var(--blue-800);background:var(--blue-050);padding:7px 11px;border-radius:8px}
    .step-layout{display:grid;grid-template-columns:260px 1fr;gap:58px;align-items:start}
    .step-nav{position:sticky;top:110px}
    .step-nav h3{font-size:18px;margin-bottom:18px}
    .step-nav a{display:flex;gap:12px;align-items:center;color:var(--muted);font-weight:700;padding:12px 0;border-bottom:1px solid var(--line)}
    .step-nav a:hover,.step-nav a.active{color:var(--blue-800)}
    .step-nav a.active{font-weight:900}
    .step-nav i{font-style:normal;width:25px;height:25px;border-radius:8px;background:var(--blue-100);color:var(--blue-800);display:grid;place-items:center;font-size:12px}
    .step-nav a.active i{background:var(--teal);color:#fff}
    .step-content{border-left:1px solid var(--line);padding-left:48px}
    .step-block{display:grid;grid-template-columns:75px 1fr;gap:25px;padding:6px 0 45px;position:relative}
    .step-block:not(:last-child)::after{content:"";position:absolute;left:36px;top:66px;bottom:0;width:1px;background:var(--line)}
    .step-number{width:72px;height:72px;border-radius:22px;background:var(--blue-900);color:#fff;display:grid;place-items:center;font-size:24px;font-weight:900;position:relative;z-index:1}
    .step-block:nth-child(2) .step-number{background:var(--teal)}
    .step-block:nth-child(3) .step-number{background:var(--orange)}
    .step-block h3{font-size:27px;margin-bottom:10px}
    .step-block p{margin-bottom:14px}
    .step-block ul{margin:0;padding-left:20px;color:var(--muted)}
    .step-block li{margin-bottom:6px}
    .scene-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:25px}
    .scene-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:28px;box-shadow:var(--shadow-sm);transition:.25s ease}
    .scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .scene-card--feature{grid-row:span 2;background:var(--blue-900);color:#fff;min-height:370px;display:flex;flex-direction:column;justify-content:space-between}
    .scene-card--feature h3,.scene-card--feature p{color:#fff}
    .scene-card--feature p{color:#c6dce9}
    .scene-card img{width:100%;height:170px;object-fit:cover;border-radius:14px;margin:20px 0}
    .scene-card--feature img{height:210px;margin-top:24px}
    .scene-card .tag{margin-bottom:15px}
    .check-list{list-style:none;margin:18px 0 0;padding:0}
    .check-list li{display:flex;gap:10px;align-items:flex-start;color:var(--muted);font-size:14px;margin-bottom:11px}
    .check-list li::before{content:"✓";color:var(--teal);font-weight:900}
    .prompt-band{background:#fff;border:1px solid var(--line);border-left:5px solid var(--orange);border-radius:14px;padding:22px 26px;margin-top:28px}
    .prompt-band strong{display:block;color:var(--blue-950);margin-bottom:5px}
    .prompt-band p{margin:0;font-size:14px}
    .content-split{display:grid;grid-template-columns:5fr 7fr;gap:66px;align-items:center}
    .content-split.reverse{grid-template-columns:7fr 5fr}
    .content-split.reverse .content-copy
    .content-image{position:relative}
    .content-image img{width:100%;height:390px;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
    .image-note{position:absolute;bottom:-18px;right:-18px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:15px 18px;box-shadow:var(--shadow-sm);font-size:13px;color:var(--blue-900);font-weight:800}
    .content-copy p{font-size:16px}
    .content-copy p:last-of-type{margin-bottom:24px}
    .metric-band{background:var(--blue-050);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
    .metric{padding:28px 25px;border-right:1px solid var(--line)}
    .metric:last-child{border-right:0}
    .metric strong{display:block;font-size:31px;color:var(--blue-950);line-height:1.2}
    .metric span{display:block;color:var(--muted);font-size:13px;margin-top:7px}
    .metric em{font-style:normal;color:var(--teal);font-size:12px;font-weight:800}
    .info-index{display:grid;grid-template-columns:.8fr 1.2fr;gap:45px;align-items:start}
    .index-panel{background:var(--blue-950);color:#fff;border-radius:var(--radius-lg);padding:34px;position:sticky;top:110px}
    .index-panel h3{color:#fff;font-size:28px}
    .index-panel p{color:#c4d8e5;font-size:14px}
    .index-panel .mini-line{height:1px;background:rgba(255,255,255,.2);margin:22px 0}
    .index-panel a{display:flex;justify-content:space-between;padding:11px 0;color:#d8ebf4;border-bottom:1px solid rgba(255,255,255,.15);font-size:14px}
    .index-panel a:hover{color:#9bd8e1;padding-left:5px}
    .reading-list{border-top:1px solid var(--line)}
    .reading-item{display:grid;grid-template-columns:55px 1fr auto;gap:20px;align-items:start;padding:23px 0;border-bottom:1px solid var(--line)}
    .reading-item .no{font-size:25px;color:var(--blue-500);font-weight:900}
    .reading-item h3{font-size:20px;margin-bottom:6px}
    .reading-item p{font-size:14px;margin:0}
    .reading-item a{color:var(--blue-800);font-size:13px;font-weight:900;white-space:nowrap}
    .faq-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:70px;align-items:start}
    .faq-intro{background:var(--blue-100);padding:30px;border-radius:var(--radius-lg)}
    .faq-intro h3{font-size:25px}
    .faq-intro p{font-size:14px}
    .accordion{margin:0;background:transparent}
    .accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent}
    .accordion-title{font-size:17px;font-weight:800;color:var(--blue-950);padding:21px 42px 21px 0;background:transparent;border:0;position:relative}
    .accordion-title:hover{color:var(--blue-700);background:transparent}
    .accordion-title::before{right:4px;color:var(--teal);font-size:22px}
    .accordion-content{border:0;background:#fff;padding:0 42px 22px 0;color:var(--muted);font-size:15px}
    .cta-panel{background:var(--blue-100);border-radius:var(--radius-lg);padding:45px 50px;display:grid;grid-template-columns:1fr auto;gap:35px;align-items:center;border:1px solid #cde5f2}
    .cta-panel h2{margin-bottom:12px}
    .cta-panel p{margin:0;max-width:680px}
    .footer{background:var(--blue-950);color:#c4d8e5;padding:65px 0 24px}
    .footer .brand{color:#fff;margin-bottom:19px}
    .footer p{color:#a9c2d1;font-size:14px;max-width:320px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:42px}
    .footer h3{font-size:15px;color:#fff;margin:4px 0 16px}
    .footer-grid>div:not(:first-child) a{display:block;color:#a9c2d1;font-size:14px;margin:8px 0}
    .footer-grid a:hover{color:#9bd8e1}
    .footer-bottom{display:flex;justify-content:space-between;gap:25px;border-top:1px solid rgba(255,255,255,.16);margin-top:45px;padding-top:20px;font-size:12px;color:#91afc0}
    .footer-bottom a{color:#c4d8e5}
    .to-top{position:fixed;right:22px;bottom:22px;width:42px;height:42px;border-radius:12px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);color:var(--blue-800);display:grid;place-items:center;z-index:20}
    .to-top:hover{background:var(--blue-100);transform:translateY(-2px)}
    @media(max-width:1024px){
      .nav-group{gap:12px}
      .nav-link{font-size:13px}
      .hero-guide-grid,.content-split,.content-split.reverse{gap:40px}
      .step-layout{grid-template-columns:210px 1fr;gap:35px}
      .footer-grid{grid-template-columns:1.3fr 1fr 1fr}
      .footer-grid>div:last-child{grid-column:span 3}
    }
    @media(max-width:768px){
      .container,.wide-container{width:min(100% - 34px,var(--max))}
      .section{padding:70px 0}
      .nav-shell{height:70px;grid-template-columns:44px 1fr 44px;gap:8px}
      .nav-group{display:none;position:absolute;left:17px;right:17px;top:78px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:2px}
      .nav-group.is-open{display:flex}
      .nav-group--right{justify-content:initial}
      .nav-link{padding:12px 13px;border-radius:9px}
      .nav-link.active{padding:12px 13px}
      .nav-link.active::after{left:13px;right:auto;width:28px;bottom:6px}
      .menu-toggle{display:block}
      .menu-toggle--left{justify-self:start}
      .menu-toggle--right{justify-self:end}
      .brand{justify-self:center;font-size:20px}
      .brand-mark{width:30px;height:30px;border-radius:9px}
      .hero-guide{padding:18px 0 70px}
      .hero-guide-grid{grid-template-columns:1fr;gap:35px}
      .hero-guide h1{font-size:42px}
      .hero-side{transform:none}
      .route-strip{margin-top:-20px}
      .route-strip-inner{display:block}
      .route-points{justify-content:flex-start;margin-top:14px}
      .step-layout,.scene-grid,.info-index,.faq-grid{grid-template-columns:1fr;gap:32px}
      .step-nav{position:static}
      .step-nav a{display:inline-flex;margin-right:12px;border:0;padding:7px 10px;background:var(--blue-050);border-radius:8px;font-size:13px}
      .step-content{border-left:0;padding-left:0}
      .step-block{grid-template-columns:58px 1fr;gap:18px}
      .step-number{width:58px;height:58px;border-radius:17px;font-size:20px}
      .step-block:not(:last-child)::after{left:29px;top:58px}
      .content-split.reverse .content-copy{order:0}
      .content-image img{height:300px}
      .image-note{right:12px}
      .metric-grid{grid-template-columns:repeat(2,1fr)}
      .metric{border-bottom:1px solid var(--line)}
      .metric:nth-child(2){border-right:0}
      .index-panel{position:static}
      .reading-item{grid-template-columns:38px 1fr}
      .reading-item>a
      .cta-panel{grid-template-columns:1fr;padding:32px 26px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .footer-grid>div:first-child,.footer-grid>div:last-child{grid-column:span 2}
      .footer-bottom{display:block;line-height:2}
      .footer-bottom>div+div{margin-top:8px}
    }
    @media(max-width:520px){
      h2{font-size:31px}
      .hero-guide h1{font-size:36px}
      .hero-guide p{font-size:16px}
      .hero-actions .btn{width:100%}
      .hero-side{padding:18px}
      .rank-row{grid-template-columns:30px 1fr auto;gap:8px}
      .route-points span{font-size:11px}
      .metric strong{font-size:25px}
      .metric{padding:22px 15px}
      .reading-item h3{font-size:17px}
      .footer-grid{grid-template-columns:1fr}
      .footer-grid>div:first-child,.footer-grid>div:last-child{grid-column:auto}
    }