/* roulang page: index */
:root{
      --ink:#17212b;--muted:#657481;--paper:#f7faf9;--white:#fff;--line:#dce8e6;
      --brand:#087f78;--brand-dark:#075952;--mint:#d9f5ed;--lime:#c8ed72;
      --orange:#f28f55;--shadow:0 18px 46px rgba(24,55,59,.10);--small-shadow:0 8px 22px rgba(24,55,59,.08);
      --radius:22px;--radius-sm:12px;--ease:all .25s ease;
    }
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;font-size:16px}
    a{color:inherit;text-decoration:none;transition:var(--ease)}img{max-width:100%;display:block}button,input{font:inherit}button:focus,a:focus,input:focus{outline:3px solid rgba(242,143,85,.35);outline-offset:3px}.container{width:min(1180px,calc(100% - 40px));margin:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(247,250,249,.94);backdrop-filter:blur(16px);border-bottom:1px solid rgba(220,232,230,.8)}
    .topbar{min-height:74px;display:flex;align-items:center;gap:25px}.logo{font-weight:900;font-size:23px;letter-spacing:0;color:var(--brand-dark);white-space:nowrap}.logo span{color:var(--orange)}
    .main-nav{display:flex;align-items:center;gap:8px;margin-left:28px}.main-nav a{padding:10px 17px;border-radius:10px;color:#52616b;font-weight:700;font-size:14px}.main-nav a:hover,.main-nav a.active{background:var(--mint);color:var(--brand-dark)}
    .nav-tools{margin-left:auto;display:flex;align-items:center;gap:14px}.status{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:13px}.status i{width:8px;height:8px;background:#6cc66d;border-radius:50%;box-shadow:0 0 0 5px #e2f5df}.nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;background:var(--brand);color:#fff;font-weight:800;padding:12px 20px;cursor:pointer;transition:var(--ease)}.nav-cta:hover,.btn:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--small-shadow)}.menu-toggle{display:none;background:transparent;border:0;font-size:24px;color:var(--brand-dark)}
    .hero{background:#e9f7f2;border-bottom:1px solid var(--line);padding:0 0 44px}.hero-ribbon{background:var(--brand-dark);color:#dff8ed;font-size:13px;padding:11px 0}.ribbon-inner{display:flex;justify-content:space-between;gap:20px;align-items:center}.ribbon-inner strong{color:var(--lime)}.hero-grid{display:grid;grid-template-columns:1.07fr .93fr;gap:55px;align-items:center;padding-top:48px}.eyebrow,.section-kicker{font-size:12px;letter-spacing:1.5px;text-transform:uppercase;color:var(--brand);font-weight:900}.hero h1{font-size:clamp(38px,5vw,68px);line-height:1.12;letter-spacing:0;margin:12px 0 22px;max-width:700px}.hero h1 em{font-style:normal;color:var(--brand)}.hero-copy{font-size:18px;color:#53666c;max-width:690px;margin-bottom:27px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.btn.secondary{background:#fff;color:var(--brand-dark);border:1px solid #b6d8d1}.btn.secondary:hover{background:var(--mint)}.hero-visual{position:relative;min-height:300px}.hero-image{height:330px;width:100%;object-fit:cover;border-radius:26px;box-shadow:var(--shadow);filter:saturate(.9)}.hero-stamp{position:absolute;left:-22px;bottom:24px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 17px;box-shadow:var(--small-shadow);font-size:13px}.hero-stamp b{display:block;font-size:23px;color:var(--brand-dark);line-height:1.2}
    section{padding:82px 0;border-bottom:1px solid var(--line)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:33px}.section-head h2{font-size:clamp(27px,3vw,42px);line-height:1.25;margin:8px 0 0;letter-spacing:0}.section-head p{max-width:560px;color:var(--muted);margin:0}.section-intro{max-width:760px;color:var(--muted);margin:-15px 0 32px}.soft{background:#eff8f5}.dark-section{background:#19363a;color:#eef9f3}.dark-section .section-kicker{color:var(--lime)}.dark-section .section-head p,.dark-section .muted{color:#b8cfca}
    .problem-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px}.problem-lead{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--small-shadow)}.problem-lead h3{font-size:25px;margin:0 0 14px}.problem-lead p{color:var(--muted)}.signal-list{display:grid;gap:12px}.signal{display:flex;gap:15px;padding:18px;background:#f1faf7;border-radius:14px}.signal b{color:var(--orange);font-size:20px}
    .demo-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--small-shadow)}.demo-step{padding:25px 22px;border-right:1px solid var(--line);position:relative}.demo-step:last-child{border:0}.step-no{display:inline-grid;place-items:center;width:31px;height:31px;border-radius:50%;background:var(--lime);color:var(--brand-dark);font-weight:900;margin-bottom:15px}.demo-step h3{font-size:18px;margin:0 0 8px}.demo-step p{font-size:14px;color:var(--muted);margin:0}
    .result-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:stretch}.result-image{height:100%;min-height:300px;object-fit:cover;border-radius:var(--radius)}.result-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px}.result-panel h3{font-size:27px;margin:0 0 12px}.metric-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:25px}.metric{padding:15px 12px;background:var(--mint);border-radius:13px}.metric strong{display:block;font-size:25px;color:var(--brand-dark)}.metric small{color:var(--muted);font-size:12px}
    .issue-grid,.feature-grid,.news-grid,.trust-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.issue,.feature-card,.news-card,.trust-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:25px;transition:var(--ease)}.issue:hover,.feature-card:hover,.news-card:hover,.trust-card:hover{transform:translateY(-5px);box-shadow:var(--small-shadow);border-color:#a6d2c8}.issue .tag,.news-card .tag{display:inline-block;background:#fff1e8;color:#b95a25;padding:4px 9px;border-radius:20px;font-size:12px;font-weight:800;margin-bottom:12px}.issue h3,.feature-card h3,.news-card h3,.trust-card h3{font-size:19px;line-height:1.4;margin:0 0 9px}.issue p,.feature-card p,.news-card p,.trust-card p{font-size:14px;color:var(--muted);margin:0}
    .path{background:var(--brand-dark);border-radius:var(--radius);padding:30px;color:#fff;display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.path-item{padding:18px;border-left:2px solid #5caaa0}.path-item strong{display:block;color:var(--lime);font-size:24px;margin-bottom:5px}.path-item span{font-size:14px;color:#c7ded8}
    .feature-grid{grid-template-columns:repeat(4,1fr)}.feature-card{background:transparent;padding:0;border:0}.feature-icon{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;background:var(--mint);color:var(--brand-dark);font-weight:900;font-size:20px;margin-bottom:17px}.feature-card h3{font-size:18px}.feature-card p{font-size:14px}
    .news-grid{grid-template-columns:1.2fr .8fr .8fr}.news-card{padding:0;overflow:hidden}.news-card img{height:155px;width:100%;object-fit:cover}.news-body{padding:20px}.news-card:first-child img{height:190px}.news-card:first-child h3{font-size:23px}.news-date{font-size:12px;color:var(--brand);font-weight:800;display:block;margin-top:15px}
    .trust-grid{grid-template-columns:repeat(4,1fr)}.trust-card{background:rgba(255,255,255,.06);border-color:rgba(216,245,237,.17);padding:20px}.trust-card h3{color:#e7f7f0;font-size:17px}.trust-card p{color:#abc9c0}.trust-mark{font-size:25px;color:var(--lime);margin-bottom:10px}
    .faq-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}.faq{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}.faq h3{font-size:17px;margin:0 0 8px}.faq p{font-size:14px;color:var(--muted);margin:0}
    .closing{background:#dff5ed;text-align:center;padding:70px 20px}.closing h2{font-size:clamp(28px,4vw,46px);margin:0 0 13px}.closing p{max-width:650px;margin:0 auto 24px;color:var(--muted)}
    footer{background:#14282d;color:#b5cbc5;padding:52px 0 22px}.footer-grid{display:grid;grid-template-columns:1.3fr .8fr .8fr;gap:40px}.footer-logo{color:#e5faf2;font-size:23px;font-weight:900}.footer-brand p{max-width:380px;font-size:14px}.footer-col h3{color:#e5faf2;font-size:15px;margin:0 0 14px}.footer-col a{display:block;color:#b5cbc5;font-size:14px;margin:8px 0}.footer-col a:hover{color:var(--lime)}.copyright{border-top:1px solid rgba(220,245,237,.15);margin-top:38px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:20px}
    @media(max-width:1024px){.hero-grid{gap:30px}.feature-grid,.trust-grid{grid-template-columns:repeat(2,1fr)}.news-grid{grid-template-columns:1fr 1fr}.news-card:first-child{grid-column:span 2}.path{grid-template-columns:repeat(2,1fr)}}
    @media(max-width:768px){.container{width:min(100% - 30px,620px)}.main-nav{display:none;position:absolute;top:74px;left:0;right:0;background:#f7faf9;border-bottom:1px solid var(--line);padding:12px 15px;flex-direction:column;align-items:stretch;margin:0}.main-nav.open{display:flex}.main-nav a{padding:12px 15px}.menu-toggle{display:block}.status{display:none}.nav-cta{padding:10px 13px;font-size:13px}.hero-grid,.problem-grid,.result-grid{grid-template-columns:1fr}.hero{padding-bottom:30px}.hero-grid{padding-top:32px}.hero h1{font-size:42px}.hero-copy{font-size:16px}.hero-visual{min-height:0}.hero-image{height:250px}.hero-stamp{left:14px;bottom:-18px}.section-head{display:block}.section-head p{margin-top:14px}.demo-strip{grid-template-columns:1fr 1fr}.demo-step:nth-child(2){border-right:0}.demo-step:nth-child(-n+2){border-bottom:1px solid var(--line)}.issue-grid,.news-grid,.faq-list{grid-template-columns:1fr}.news-card:first-child{grid-column:auto}.news-card:first-child img{height:155px}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:8px}}
    @media(max-width:520px){.topbar{min-height:66px}.logo{font-size:20px}.nav-cta{display:none}.hero h1{font-size:36px}.hero-ribbon{font-size:12px}.ribbon-inner{display:block}.ribbon-inner span{display:block;margin-top:4px}.demo-strip,.metric-row,.path{grid-template-columns:1fr}.demo-step{border-right:0!important;border-bottom:1px solid var(--line)}.demo-step:last-child{border-bottom:0}.feature-grid,.trust-grid,.footer-grid{grid-template-columns:1fr}.section{padding:60px 0}.hero-actions .btn{width:100%}.copyright{font-size:11px}}

/* roulang page: category1 */
:root{
      --ink:#17212b;--muted:#657481;--paper:#f7faf9;--white:#fff;--line:#dce8e6;
      --brand:#087f78;--brand-dark:#075952;--mint:#d9f5ed;--lime:#c8ed72;
      --orange:#f28f55;--shadow:0 18px 46px rgba(24,55,59,.10);--small-shadow:0 8px 22px rgba(24,55,59,.08);
      --radius:22px;--radius-sm:12px;--ease:all .25s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;font-size:16px}
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    button:focus,a:focus,input:focus{outline:3px solid rgba(242,143,85,.35);outline-offset:3px}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(247,250,249,.94);backdrop-filter:blur(16px);border-bottom:1px solid rgba(220,232,230,.8)}
    .topbar{min-height:74px;display:flex;align-items:center;gap:25px}
    .logo{font-weight:900;font-size:23px;letter-spacing:0;color:var(--brand-dark);white-space:nowrap}
    .logo span{color:var(--orange)}
    .main-nav{display:flex;align-items:center;gap:8px;margin-left:28px}
    .main-nav a{padding:10px 17px;border-radius:10px;color:#52616b;font-weight:700;font-size:14px}
    .main-nav a:hover,.main-nav a.active{background:var(--mint);color:var(--brand-dark)}
    .nav-tools{margin-left:auto;display:flex;align-items:center;gap:14px}
    .status{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:13px}
    .status i{width:8px;height:8px;border-radius:50%;background:#79bd55;box-shadow:0 0 0 4px #e4f4dc}
    .nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;background:var(--brand);color:#fff;font-weight:800;padding:12px 20px;cursor:pointer;transition:var(--ease)}
    .nav-cta:hover,.btn:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--small-shadow)}
    .menu-toggle{display:none;background:transparent;border:0;font-size:24px;color:var(--brand-dark)}
    .hero{position:relative;min-height:540px;overflow:hidden;background:#173c3d;color:#fff}
    .hero-media{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.48}
    .hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(12,42,43,.92) 0%,rgba(17,58,57,.72) 44%,rgba(10,42,42,.32) 100%)}
    .hero-content{position:relative;z-index:1;min-height:540px;display:flex;align-items:center;padding:70px 0}
    .hero-copy{max-width:720px}
    .eyebrow,.section-kicker{font-size:12px;letter-spacing:1.5px;text-transform:uppercase;color:var(--brand);font-weight:900}
    .hero .eyebrow{color:var(--lime)}
    .hero h1{font-size:clamp(38px,5vw,68px);line-height:1.12;margin:13px 0 20px;letter-spacing:0}
    .hero h1 em{font-style:normal;color:var(--lime)}
    .hero-copy p{font-size:18px;color:#d4e8e2;max-width:660px;margin:0 0 28px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .btn.light{background:#fff;color:var(--brand-dark)}
    .btn.light:hover{background:var(--lime)}
    .play-button{width:58px;height:58px;border-radius:50%;border:1px solid rgba(255,255,255,.65);background:rgba(255,255,255,.14);color:#fff;display:inline-grid;place-items:center;font-size:20px;cursor:pointer}
    .play-button:hover{background:var(--orange);border-color:var(--orange);transform:scale(1.05)}
    .video-note{display:flex;align-items:center;gap:12px;margin-top:30px;color:#bcd7d0;font-size:13px}
    .hero-panel{position:absolute;right:5%;bottom:42px;width:265px;background:rgba(255,255,255,.94);color:var(--ink);border-radius:18px;padding:18px;box-shadow:var(--shadow)}
    .hero-panel small{display:block;color:var(--muted);font-size:12px;margin-bottom:8px}
    .hero-panel strong{font-size:29px;line-height:1;color:var(--brand-dark)}
    .panel-line{height:7px;background:#e5efed;border-radius:10px;margin:14px 0 10px;overflow:hidden}
    .panel-line span{display:block;width:82%;height:100%;background:var(--orange);border-radius:10px}
    .panel-foot{display:flex;justify-content:space-between;font-size:12px;color:var(--muted)}
    section{padding:82px 0;border-bottom:1px solid var(--line)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:33px}
    .section-head h2{font-size:clamp(27px,3vw,42px);line-height:1.25;margin:8px 0 0;letter-spacing:0}
    .section-head p{max-width:560px;color:var(--muted);margin:0}
    .section-intro{max-width:760px;color:var(--muted);margin:-15px 0 32px}
    .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .metric{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--small-shadow)}
    .metric strong{display:block;color:var(--brand-dark);font-size:34px;line-height:1.15}
    .metric span{display:block;color:var(--muted);font-size:14px;margin-top:7px}
    .metric b{display:inline-block;margin-top:14px;background:var(--mint);color:var(--brand-dark);padding:4px 9px;border-radius:20px;font-size:12px}
    .dark-section{background:#19363a;color:#eef9f3}
    .dark-section .section-kicker{color:var(--lime)}
    .dark-section .section-head p,.dark-section .muted{color:#b8cfca}
    .matrix{display:grid;grid-template-columns:1.2fr .8fr;gap:24px}
    .matrix-lead{background:#fff;color:var(--ink);border-radius:var(--radius);padding:32px;box-shadow:var(--small-shadow)}
    .matrix-lead h3{font-size:25px;margin:0 0 12px}
    .matrix-lead p{color:var(--muted);margin:0 0 23px}
    .matrix-list{display:grid;gap:12px}
    .matrix-item{display:flex;align-items:center;gap:15px;border-top:1px solid var(--line);padding-top:14px}
    .matrix-icon{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:var(--mint);color:var(--brand-dark);font-weight:900}
    .matrix-item strong{display:block;font-size:16px}
    .matrix-item span{display:block;color:var(--muted);font-size:13px}
    .side-stack{display:grid;gap:15px}
    .side-card{border:1px solid rgba(216,245,237,.18);background:rgba(255,255,255,.06);border-radius:18px;padding:22px}
    .side-card h3{font-size:19px;margin:0 0 8px;color:#e7f7f0}
    .side-card p{font-size:14px;color:#abc9c0;margin:0}
    .compare{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:stretch}
    .compare-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:29px}
    .compare-card.accent{background:#e8f7f1;border-color:#b9ded4}
    .compare-card h3{margin:0 0 7px;font-size:23px}
    .compare-card p{color:var(--muted);margin:0 0 20px}
    .compare-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}
    .compare-list li{display:flex;gap:10px;align-items:flex-start;font-size:14px}
    .compare-list li:before{content:"✓";color:var(--brand);font-weight:900}
    .milestones{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:30px}
    .milestone{padding:20px 22px;border-left:2px solid #8bcac0}
    .milestone b{display:block;color:var(--brand);font-size:25px}
    .milestone h3{font-size:17px;margin:7px 0}
    .milestone p{font-size:14px;color:var(--muted);margin:0}
    .news-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px}
    .news-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:0;overflow:hidden;transition:var(--ease)}
    .news-card:hover{transform:translateY(-5px);box-shadow:var(--small-shadow);border-color:#a6d2c8}
    .news-card img{height:155px;width:100%;object-fit:cover}
    .news-card:first-child img{height:190px}
    .news-body{padding:20px}
    .tag{display:inline-block;background:#fff1e8;color:#b95a25;padding:4px 9px;border-radius:20px;font-size:12px;font-weight:800;margin-bottom:12px}
    .news-card h3{font-size:19px;line-height:1.4;margin:0 0 9px}
    .news-card:first-child h3{font-size:23px}
    .news-card p{font-size:14px;color:var(--muted);margin:0}
    .trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .trust-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px}
    .trust-card h3{font-size:18px;margin:0 0 8px}
    .trust-card p{font-size:14px;color:var(--muted);margin:0}
    .faq-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .faq{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}
    .faq h3{font-size:17px;margin:0 0 8px}
    .faq p{font-size:14px;color:var(--muted);margin:0}
    .cta-section{background:#e7f6f1}
    .cta-box{display:flex;align-items:center;justify-content:space-between;gap:25px}
    .cta-box h2{font-size:clamp(27px,3vw,40px);margin:0 0 9px}
    .cta-box p{color:var(--muted);margin:0;max-width:650px}
    footer{background:#14282d;color:#b5cbc5;padding:52px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.3fr .8fr .8fr;gap:40px}
    .footer-logo{color:#e5faf2;font-size:23px;font-weight:900}
    .footer-brand p{max-width:380px;font-size:14px}
    .footer-col h3{color:#e5faf2;font-size:15px;margin:0 0 14px}
    .footer-col a{display:block;color:#b5cbc5;font-size:14px;margin:8px 0}
    .footer-col a:hover{color:var(--lime)}
    .copyright{border-top:1px solid rgba(216,245,237,.14);margin-top:36px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;font-size:12px;color:#849f98}
    @media(max-width:1024px){
      .hero-panel{right:3%;width:230px}
      .metrics,.trust-grid{grid-template-columns:repeat(2,1fr)}
      .milestones{grid-template-columns:repeat(2,1fr);gap:12px}
    }
    @media(max-width:768px){
      .container{width:min(100% - 30px,620px)}
      .topbar{min-height:66px}
      .menu-toggle{display:block;margin-left:auto}
      .main-nav{display:none;position:absolute;left:15px;right:15px;top:66px;margin:0;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .main-nav.open{display:flex}
      .main-nav a{width:100%}
      .nav-tools{display:none}
      .hero{min-height:650px}
      .hero-content{min-height:650px;padding:45px 0;align-items:flex-start}
      .hero h1{font-size:43px}
      .hero-panel{left:0;right:auto;bottom:35px;width:245px}
      .hero-copy p{font-size:16px}
      .matrix,.compare,.news-grid,.faq-list{grid-template-columns:1fr}
      .section-head,.cta-box{display:block}
      .section-head p{margin-top:14px}
      .cta-box .btn{margin-top:22px}
    }
    @media(max-width:520px){
      section{padding:60px 0}
      .metrics,.trust-grid,.milestones{grid-template-columns:1fr}
      .logo{font-size:20px}
      .hero h1{font-size:37px}
      .hero-actions .btn{width:100%}
      .play-button{width:50px;height:50px}
      .copyright,.footer-grid{display:block}
      .footer-col{margin-top:25px}
      .copyright span{display:block;margin-top:8px}
    }