/* roulang page: index */
:root{
            --ink:#17283d;
            --muted:#66758a;
            --blue:#2468d6;
            --blue-dark:#174da8;
            --blue-soft:#eaf2ff;
            --cyan:#34a7b8;
            --warm:#f7f9fc;
            --paper:#ffffff;
            --line:#dce5f0;
            --line-strong:#c7d7e9;
            --orange:#d88943;
            --green:#328a72;
            --radius:18px;
            --radius-sm:11px;
            --shadow:0 14px 38px rgba(28,66,111,.09);
            --shadow-hover:0 20px 46px rgba(28,66,111,.15);
        }
        *,*:before,*:after{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            color:var(--ink);
            background:var(--warm);
            font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
            font-size:16px;
            line-height:1.78;
            overflow-x:hidden;
        }
        a{color:inherit;text-decoration:none}
        img{display:block;max-width:100%;height:auto}
        button,input,select,textarea{font:inherit}
        .container{max-width:1180px;padding-left:22px;padding-right:22px}
        .site-header{
            position:sticky;top:0;z-index:50;
            background:rgba(255,255,255,.94);
            border-bottom:1px solid rgba(220,229,240,.9);
            backdrop-filter:blur(12px);
        }
        .nav-shell{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
        .brand{display:inline-flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.03em;color:var(--ink);white-space:nowrap}
        .brand-mark{width:31px;height:31px;border:2px solid var(--blue);border-radius:9px;position:relative;background:var(--blue-soft)}
        .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:var(--blue);border-radius:2px}
        .brand-mark:before{width:12px;height:2px;left:7px;top:9px;box-shadow:0 6px 0 var(--cyan)}
        .brand-mark:after{width:2px;height:9px;left:7px;top:15px}
        .brand-name{font-size:18px}
        .nav-links{display:flex;align-items:center;gap:6px}
        .nav-links a{
            position:relative;padding:9px 14px;border:1px solid transparent;border-radius:10px;
            color:#52647b;font-size:14px;transition:.22s ease;
        }
        .nav-links a:hover{color:var(--blue);background:#f3f7fd;border-color:#e0ebfa}
        .nav-links a.active{color:var(--blue-dark);background:var(--blue-soft);border-color:#c8dcfb;font-weight:700}
        .nav-links a.active:after{content:"";width:18px;height:2px;position:absolute;bottom:3px;left:14px;background:var(--blue);border-radius:2px}
        .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:10px;padding:8px 11px}
        .menu-toggle:focus,.btn:focus,input:focus,select:focus,textarea:focus,.accordion-button:focus{outline:3px solid rgba(36,104,214,.2);outline-offset:2px}
        .hero{padding:72px 0 42px;position:relative}
        .hero:before{content:"";position:absolute;inset:0 0 auto;height:390px;background:linear-gradient(110deg,#f7fbff 0%,#eef5ff 54%,#f8fafc 100%);z-index:-1;border-bottom:1px solid #e4edf8}
        .eyebrow,.section-kicker{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);font-weight:800}
        .hero-layout{display:grid;grid-template-columns:1.08fr .92fr;gap:60px;align-items:center}
        h1,h2,h3{margin:0;font-weight:800;letter-spacing:-.035em;line-height:1.25}
        h1{font-size:clamp(2.25rem,4.5vw,4.2rem);max-width:700px}
        h2{font-size:clamp(1.65rem,3vw,2.45rem)}
        h3{font-size:1.2rem}
        .hero h1{margin:14px 0 20px}
        .hero-copy{font-size:18px;color:#586a81;max-width:650px}
        .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:29px}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:12px 20px;border:1px solid transparent;font-weight:700;font-size:14px;transition:.22s ease}
        .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(36,104,214,.2)}
        .btn-primary:hover{background:var(--blue-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(36,104,214,.25)}
        .btn-outline{background:#fff;border-color:#bcd0e9;color:var(--blue-dark)}
        .btn-outline:hover{background:var(--blue-soft);border-color:var(--blue);color:var(--blue-dark);transform:translateY(-2px)}
        .btn:active{transform:translateY(1px)}
        .hero-points{display:flex;gap:22px;flex-wrap:wrap;margin-top:25px;color:var(--muted);font-size:13px}
        .hero-points span:before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--cyan);margin:0 8px 1px 0}
        .index-panel{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:25px;position:relative}
        .index-panel:after{content:"01 / INDEX";position:absolute;right:22px;top:20px;color:#9aacbf;font-size:10px;letter-spacing:.12em}
        .panel-head{display:flex;align-items:center;gap:10px;padding-bottom:19px;border-bottom:1px solid var(--line)}
        .status-dot{width:9px;height:9px;border-radius:50%;background:#48ad8c;box-shadow:0 0 0 5px #e5f5ef}
        .panel-title{font-weight:800}
        .panel-row{display:flex;justify-content:space-between;align-items:center;padding:16px 0;border-bottom:1px solid #edf2f7;gap:14px}
        .panel-row:last-child{border-bottom:0;padding-bottom:3px}
        .panel-row small{display:block;color:var(--muted);font-size:12px}
        .panel-value{color:var(--blue-dark);font-weight:800;font-size:14px;text-align:right}
        .tag{display:inline-flex;align-items:center;border-radius:6px;padding:3px 8px;background:var(--blue-soft);color:var(--blue-dark);font-size:11px;font-weight:700}
        .tag.green{background:#e8f5f0;color:#26765f}
        .tag.orange{background:#fff2e5;color:#9a5d2d}
        .section{padding:78px 0}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:30px}
        .section-head p{margin:9px 0 0;color:var(--muted);max-width:670px}
        .section-link{color:var(--blue);font-size:14px;font-weight:700;white-space:nowrap}
        .section-link:hover{color:var(--blue-dark)}
        .metrics{padding:22px 0 20px}
        .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
        .metric{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 21px;position:relative;overflow:hidden}
        .metric:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--blue)}
        .metric:nth-child(2):before{background:var(--cyan)}.metric:nth-child(3):before{background:var(--orange)}.metric:nth-child(4):before{background:var(--green)}
        .metric-no{font-size:10px;color:#9aaabd;letter-spacing:.12em}
        .metric strong{display:block;font-size:28px;line-height:1.2;margin:7px 0 3px}
        .metric span{font-size:12px;color:var(--muted)}
        .matrix{background:#f0f5fb}
        .matrix-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}
        .topic-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:27px;box-shadow:0 8px 24px rgba(36,70,110,.05);transition:.22s ease;min-height:190px;display:flex;flex-direction:column;justify-content:space-between}
        .topic-card:hover,.feature-card:hover,.list-row:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
        .topic-card.primary{grid-row:span 2;min-height:400px;background:linear-gradient(145deg,#fff 0%,#f5f9ff 100%)}
        .card-index{font-size:11px;color:var(--blue);font-weight:800;letter-spacing:.12em}
        .topic-card h3{margin:16px 0 8px;font-size:1.45rem}
        .topic-card p{color:var(--muted);font-size:14px;margin:0;max-width:500px}
        .card-foot{display:flex;justify-content:space-between;align-items:center;margin-top:22px}
        .arrow{font-size:21px;color:var(--blue);transition:.2s}.topic-card:hover .arrow{transform:translateX(5px)}
        .compare-wrap{display:grid;grid-template-columns:1fr 1fr;gap:18px}
        .compare-card{border-radius:var(--radius);padding:28px;border:1px solid var(--line);background:#fff}
        .compare-card.highlight{background:var(--blue-dark);color:#fff;border-color:var(--blue-dark);box-shadow:var(--shadow)}
        .compare-label{display:inline-block;font-size:11px;letter-spacing:.1em;font-weight:800;margin-bottom:18px;color:var(--blue)}
        .highlight .compare-label{color:#b9d4ff}
        .compare-card h3{margin-bottom:12px}
        .compare-card p{font-size:14px;color:var(--muted);margin-bottom:18px}
        .highlight p{color:#d4e2f7}
        .compare-list{list-style:none;margin:0;padding:0}
        .compare-list li{border-top:1px solid var(--line);padding:11px 0;font-size:14px;color:#52647a}
        .highlight .compare-list li{border-color:rgba(255,255,255,.17);color:#e4eefc}
        .compare-list li:before{content:"✓";color:var(--cyan);font-weight:800;margin-right:9px}
        .info-band{padding:30px 0;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
        .info-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
        .step-list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:20px}
        .step{border-left:2px solid var(--blue);padding:10px 14px;background:#f6f9fd}
        .step b{font-size:13px;display:block}.step span{font-size:12px;color:var(--muted)}
        .news-list{border-top:1px solid var(--line)}
        .news-item{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 0;border-bottom:1px solid var(--line)}
        .news-item a{font-weight:700;color:var(--ink)}.news-item a:hover{color:var(--blue)}
        .news-item small{color:#8a99aa;white-space:nowrap;font-size:12px}
        .faq-section{background:#f0f5fb}
        .faq-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:70px;align-items:start}
        .faq-note{color:var(--muted);font-size:15px;margin-top:18px}
        .accordion-item{border:1px solid var(--line)!important;border-radius:12px!important;overflow:hidden;margin-bottom:11px;background:#fff}
        .accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:18px 20px;box-shadow:none!important}
        .accordion-button:not(.collapsed){color:var(--blue-dark);background:var(--blue-soft)}
        .accordion-body{color:var(--muted);font-size:14px;padding:0 20px 19px;background:var(--blue-soft)}
        .cta-section{padding:78px 0}
        .cta-box{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:center;background:#e7f0fc;border:1px solid #cbdcf3;border-radius:24px;padding:38px}
        .cta-box p{color:var(--muted);margin:15px 0 0}
        .form-card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:24px;box-shadow:var(--shadow)}
        .form-label{font-size:13px;font-weight:700;color:#43556d;margin-bottom:7px}
        .form-control,.form-select{border:1px solid var(--line-strong);border-radius:9px;padding:11px 13px;color:var(--ink);background:#fff}
        .form-control:hover,.form-select:hover{border-color:#9dbce4}
        .form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(36,104,214,.1)}
        .form-note{font-size:12px;color:#8291a3;margin-top:12px}
        .site-footer{background:#17283d;color:#d8e3f1;padding:46px 0 22px}
        .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:40px;padding-bottom:30px;border-bottom:1px solid rgba(216,227,241,.16)}
        .footer-brand{color:#fff}.footer-copy{color:#9fb0c4;font-size:13px;max-width:360px;margin-top:14px}
        .footer-title{font-size:13px;color:#fff;font-weight:800;margin-bottom:13px}
        .footer-links{display:flex;flex-direction:column;gap:8px;font-size:13px;color:#aebed0}
        .footer-links a:hover{color:#fff}
        .copyright{display:flex;justify-content:space-between;gap:20px;padding-top:19px;color:#8fa2b7;font-size:12px}
        .notice{font-size:12px;color:#93a6bb}
        @media(max-width:991px){
            .nav-links{gap:0}.nav-links a{padding:8px 9px}
            .hero-layout{gap:32px}.metric-grid{grid-template-columns:repeat(2,1fr)}
            .faq-layout{gap:35px}.cta-box{gap:25px}
        }
        @media(max-width:767px){
            .nav-shell{min-height:68px}.menu-toggle{display:block}
            .nav-links{display:none;position:absolute;left:15px;right:15px;top:74px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
            .nav-links.show{display:flex}.nav-links a{padding:12px 14px}
            .hero{padding:54px 0 28px}.hero:before{height:470px}.hero-layout,.matrix-grid,.compare-wrap,.info-grid,.faq-layout,.cta-box{grid-template-columns:1fr}
            .hero-copy{font-size:16px}.index-panel{margin-top:8px}
            .section{padding:58px 0}.section-head{display:block;margin-bottom:23px}.section-link{display:inline-block;margin-top:15px}
            .topic-card.primary{grid-row:auto;min-height:260px}.step-list{grid-template-columns:1fr}
            .cta-box{padding:25px}.footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-grid>div:first-child{grid-column:1/-1}
            .copyright{display:block}.copyright .notice{margin-top:9px}
        }
        @media(max-width:520px){
            .container{padding-left:16px;padding-right:16px}.brand-name{font-size:15px}.brand-mark{width:27px;height:27px}
            h1{font-size:2.25rem}.metric{padding:16px 14px}.metric strong{font-size:24px}
            .topic-card{padding:22px}.compare-card{padding:22px}.footer-grid{grid-template-columns:1fr}
        }

/* roulang page: category2 */
:root{
      --ink:#17283d;
      --muted:#66758a;
      --blue:#2468d6;
      --blue-dark:#174da8;
      --blue-soft:#eaf2ff;
      --cyan:#34a7b8;
      --warm:#f7f9fc;
      --paper:#fff;
      --line:#dce5f0;
      --line-strong:#c7d7e9;
      --orange:#d88943;
      --green:#328a72;
      --radius:18px;
      --radius-sm:11px;
      --shadow:0 14px 38px rgba(28,66,111,.09);
      --shadow-hover:0 20px 46px rgba(28,66,111,.15);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;background:var(--warm);color:var(--ink);
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
      font-size:16px;line-height:1.78;overflow-x:hidden
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    button,input,select,textarea{font:inherit}
    .container{max-width:1180px;padding-left:22px;padding-right:22px}
    .site-header{
      position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);
      border-bottom:1px solid rgba(220,229,240,.9);backdrop-filter:blur(12px)
    }
    .nav-shell{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .brand{display:inline-flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.03em;color:var(--ink);white-space:nowrap}
    .brand-mark{width:31px;height:31px;border:2px solid var(--blue);border-radius:9px;position:relative;background:var(--blue-soft)}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:var(--blue);border-radius:2px}
    .brand-mark:before{width:12px;height:2px;left:7px;top:9px;box-shadow:0 6px 0 var(--cyan)}
    .brand-mark:after{width:2px;height:9px;left:7px;top:15px}
    .brand-name{font-size:18px}
    .nav-links{display:flex;align-items:center;gap:6px}
    .nav-links a{position:relative;padding:9px 14px;border:1px solid transparent;border-radius:10px;color:#52647b;font-size:14px;transition:.22s ease}
    .nav-links a:hover{color:var(--blue);background:#f3f7fd;border-color:#e0ebfa}
    .nav-links a.active{color:var(--blue-dark);background:var(--blue-soft);border-color:#c8dcfb;font-weight:700}
    .nav-links a.active:after{content:"";width:18px;height:2px;position:absolute;bottom:3px;left:14px;background:var(--blue);border-radius:2px}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:10px;padding:8px 11px}
    .menu-toggle:focus,.btn:focus,input:focus,select:focus,textarea:focus,.accordion-button:focus{outline:3px solid rgba(36,104,214,.2);outline-offset:2px}
    .hero{padding:70px 0 48px;position:relative}
    .hero:before{content:"";position:absolute;inset:0 0 auto;height:360px;background:linear-gradient(110deg,#f7fbff,#eef5ff 54%,#f8fafc);z-index:-1;border-bottom:1px solid #e4edf8}
    .eyebrow,.section-kicker{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);font-weight:800}
    h1{font-size:clamp(2.2rem,4vw,3.8rem);line-height:1.2;letter-spacing:-.045em;margin:13px 0 18px;font-weight:800}
    h2{font-size:clamp(1.65rem,2.5vw,2.35rem);line-height:1.3;letter-spacing:-.03em;font-weight:800}
    h3{font-weight:800;line-height:1.4}
    .hero-layout{display:grid;grid-template-columns:1.12fr .88fr;gap:58px;align-items:center}
    .hero-copy{font-size:18px;color:#586a81;max-width:650px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:27px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:12px 20px;border:1px solid transparent;font-weight:700;font-size:14px;transition:.22s ease}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(36,104,214,.2)}
    .btn-primary:hover{background:var(--blue-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(36,104,214,.25)}
    .btn-outline{background:#fff;border-color:#bcd0e9;color:var(--blue-dark)}
    .btn-outline:hover{background:var(--blue-soft);border-color:var(--blue);color:var(--blue-dark);transform:translateY(-2px)}
    .btn:active{transform:translateY(1px)}
    .status-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:27px;box-shadow:var(--shadow)}
    .panel-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #edf2f7;padding-bottom:18px}
    .panel-title{font-weight:800}
    .panel-code{color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.1em}
    .panel-row{display:flex;justify-content:space-between;align-items:center;padding:16px 0;border-bottom:1px solid #edf2f7;gap:14px}
    .panel-row:last-child{border-bottom:0;padding-bottom:3px}
    .panel-row small{display:block;color:var(--muted);font-size:12px}
    .tag{display:inline-flex;align-items:center;border-radius:6px;padding:3px 8px;background:var(--blue-soft);color:var(--blue-dark);font-size:11px;font-weight:700}
    .tag.green{background:#e8f5f0;color:#26765f}.tag.orange{background:#fff2e5;color:#9a5d2d}
    .section{padding:76px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:30px}
    .section-head p{margin:9px 0 0;color:var(--muted);max-width:670px}
    .section-link{color:var(--blue);font-size:14px;font-weight:700;white-space:nowrap}
    .section-link:hover{color:var(--blue-dark)}
    .index-strip{display:flex;gap:10px;flex-wrap:wrap;padding:15px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);box-shadow:0 7px 20px rgba(36,70,110,.04)}
    .filter-link{padding:8px 14px;border-radius:8px;color:var(--muted);font-size:13px;border:1px solid transparent;transition:.2s}
    .filter-link:hover,.filter-link.current{background:var(--blue-soft);border-color:#c8dcfb;color:var(--blue-dark);font-weight:700}
    .feature-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:18px;margin-top:25px}
    .feature-card,.list-row,.mini-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(36,70,110,.05);transition:.22s ease}
    .feature-card{padding:34px;min-height:320px;display:flex;flex-direction:column;justify-content:space-between;background:linear-gradient(145deg,#fff,#f2f7ff)}
    .feature-card:hover,.list-row:hover,.mini-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
    .feature-card h3{font-size:1.8rem;margin:15px 0 12px}
    .feature-card p,.list-row p,.mini-card p{color:var(--muted);font-size:14px}
    .list-stack{display:flex;flex-direction:column;gap:12px}
    .list-row{padding:18px 20px;display:grid;grid-template-columns:44px 1fr auto;gap:14px;align-items:center}
    .row-number{color:var(--blue);font-weight:800;font-size:13px}
    .list-row h3{font-size:1rem;margin:0 0 3px}.list-row p{margin:0;font-size:13px}
    .row-arrow{font-size:20px;color:var(--blue)}
    .meta-line{display:flex;gap:8px;align-items:center;margin-top:8px;color:var(--muted);font-size:12px}
    .status-dot{width:7px;height:7px;border-radius:50%;display:inline-block;background:var(--green)}
    .timeline{margin-top:48px;border-left:2px solid #cfe0f5;padding-left:28px}
    .timeline-item{position:relative;padding:0 0 28px}
    .timeline-item:last-child{padding-bottom:0}
    .timeline-item:before{content:"";position:absolute;width:11px;height:11px;border:3px solid var(--blue);background:#fff;border-radius:50%;left:-35px;top:8px}
    .timeline-item h3{margin:0 0 5px;font-size:1.05rem}.timeline-item p{margin:0;color:var(--muted);font-size:14px}
    .mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:28px}
    .mini-card{padding:22px}.mini-card h3{font-size:1rem;margin:12px 0 5px}.mini-card p{margin:0;font-size:13px}
    .faq-section{background:#eef5ff}
    .faq-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:55px;align-items:start}
    .faq-note{color:var(--muted);margin-top:14px}
    .accordion-item{border:1px solid var(--line)!important;border-radius:11px!important;overflow:hidden;margin-bottom:10px;background:#fff}
    .accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:18px 20px;box-shadow:none!important}
    .accordion-button:not(.collapsed){color:var(--blue-dark);background:var(--blue-soft)}
    .accordion-body{color:var(--muted);font-size:14px;padding:0 20px 19px;background:var(--blue-soft)}
    .cta-box{background:var(--blue-dark);color:#fff;border-radius:var(--radius);padding:42px;box-shadow:var(--shadow);position:relative;overflow:hidden}
    .cta-box:after{content:"91 / INDEX";position:absolute;right:30px;bottom:20px;color:rgba(255,255,255,.12);font-size:38px;font-weight:800;letter-spacing:.08em}
    .cta-box p{color:#d9e6fb;max-width:650px}.cta-box .btn-primary{background:#fff;color:var(--blue-dark);box-shadow:none}.cta-box .btn-primary:hover{background:#eaf2ff}
    .site-footer{padding:52px 0 22px;background:#fff;border-top:1px solid var(--line)}
    .footer-grid{display:grid;grid-template-columns:1.6fr .7fr .8fr;gap:50px}
    .footer-brand{margin-bottom:13px}.footer-copy{max-width:420px;color:var(--muted);font-size:14px;margin:0}
    .footer-title{font-size:13px;font-weight:800;margin-bottom:14px}.footer-links{display:grid;gap:8px;color:var(--muted);font-size:14px}.footer-links a:hover{color:var(--blue)}
    .copyright{display:flex;justify-content:space-between;gap:18px;border-top:1px solid var(--line);margin-top:38px;padding-top:18px;color:#8391a3;font-size:12px}.notice{text-align:right}
    @media(max-width:992px){.hero-layout,.feature-grid,.faq-layout{grid-template-columns:1fr;gap:30px}.hero{padding-top:54px}.feature-card{min-height:250px}.footer-grid{grid-template-columns:1.2fr 1fr 1fr}}
    @media(max-width:768px){.nav-shell{min-height:68px}.menu-toggle{display:block}.nav-links{display:none;position:absolute;left:22px;right:22px;top:74px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav-links.show{display:flex}.nav-links a{padding:12px 14px}.hero{padding:48px 0 35px}.section{padding:56px 0}.mini-grid{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-grid>div:first-child{grid-column:1/-1}.copyright{flex-direction:column}.notice{text-align:left}}
    @media(max-width:576px){.container{padding-left:17px;padding-right:17px}.brand-name{font-size:16px}.hero h1{font-size:2.25rem}.hero-copy{font-size:16px}.hero-actions .btn{width:100%}.status-panel,.feature-card,.cta-box{padding:24px}.list-row{grid-template-columns:30px 1fr auto;padding:15px 14px}.list-row h3{font-size:.94rem}.mini-grid{grid-template-columns:1fr}.index-strip{overflow-x:auto;flex-wrap:nowrap}.filter-link{white-space:nowrap}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}}

/* roulang page: category1 */
:root{
            --ink:#17283d;
            --muted:#66758a;
            --blue:#2468d6;
            --blue-dark:#174da8;
            --blue-soft:#eaf2ff;
            --cyan:#34a7b8;
            --warm:#f7f9fc;
            --paper:#fff;
            --line:#dce5f0;
            --line-strong:#c7d7e9;
            --orange:#d88943;
            --green:#328a72;
            --radius:18px;
            --radius-sm:11px;
            --shadow:0 14px 38px rgba(28,66,111,.09);
            --shadow-hover:0 20px 46px rgba(28,66,111,.15);
        }
        *,*::before,*::after{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;color:var(--ink);background:var(--warm);
            font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
            font-size:16px;line-height:1.78;overflow-x:hidden;
        }
        a{color:inherit;text-decoration:none}
        img{display:block;max-width:100%;height:auto}
        button,input,select,textarea{font:inherit}
        h1,h2,h3,h4{font-weight:800;line-height:1.28;letter-spacing:-.025em}
        h1{font-size:clamp(2.25rem,4.6vw,4.1rem)}
        h2{font-size:clamp(1.7rem,3vw,2.45rem)}
        h3{font-size:1.28rem}
        p{margin-bottom:1rem}
        .container{max-width:1180px;padding-left:22px;padding-right:22px}
        .site-header{
            position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);
            border-bottom:1px solid rgba(220,229,240,.9);backdrop-filter:blur(12px)
        }
        .nav-shell{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
        .brand{display:inline-flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.03em;color:var(--ink);white-space:nowrap}
        .brand-mark{width:31px;height:31px;border:2px solid var(--blue);border-radius:9px;position:relative;background:var(--blue-soft)}
        .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:var(--blue);border-radius:2px}
        .brand-mark:before{width:12px;height:2px;left:7px;top:9px;box-shadow:0 6px 0 var(--cyan)}
        .brand-mark:after{width:2px;height:9px;left:7px;top:15px}
        .brand-name{font-size:18px}
        .nav-links{display:flex;align-items:center;gap:6px}
        .nav-links a{
            position:relative;padding:9px 14px;border:1px solid transparent;border-radius:10px;
            color:#52647b;font-size:14px;transition:.22s ease
        }
        .nav-links a:hover{color:var(--blue);background:#f3f7fd;border-color:#e0ebfa}
        .nav-links a.active{color:var(--blue-dark);background:var(--blue-soft);border-color:#c8dcfb;font-weight:700}
        .nav-links a.active:after{content:"";width:18px;height:2px;position:absolute;bottom:3px;left:14px;background:var(--blue);border-radius:2px}
        .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:10px;padding:8px 11px}
        .menu-toggle:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-soft)}
        .menu-toggle:focus,.btn:focus,input:focus,select:focus,textarea:focus,.accordion-button:focus{outline:3px solid rgba(36,104,214,.2);outline-offset:2px}
        .hero{padding:76px 0 62px;position:relative}
        .hero:before{content:"";position:absolute;inset:0 0 auto;height:430px;background:linear-gradient(110deg,#f7fbff,#eef5ff 55%,#f8fafc);z-index:-1;border-bottom:1px solid #e4edf8}
        .hero-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:66px;align-items:center}
        .eyebrow,.section-kicker{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);font-weight:800}
        .hero h1{margin:15px 0 19px}
        .hero-copy{font-size:18px;color:#586a81;max-width:650px}
        .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:12px 20px;border:1px solid transparent;font-weight:700;font-size:14px;transition:.22s ease}
        .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(36,104,214,.2)}
        .btn-primary:hover{background:var(--blue-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(36,104,214,.25)}
        .btn-outline{background:#fff;border-color:#bcd0e9;color:var(--blue-dark)}
        .btn-outline:hover{background:var(--blue-soft);border-color:var(--blue);color:var(--blue-dark);transform:translateY(-2px)}
        .btn:active{transform:translateY(1px)}
        .hero-points{display:flex;gap:22px;flex-wrap:wrap;margin-top:24px;color:var(--muted);font-size:13px}
        .hero-points span:before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--cyan);margin:0 8px 1px 0}
        .guide-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px;position:relative}
        .guide-card:after{content:"01 / INDEX";position:absolute;right:23px;top:20px;color:#9aacc0;font-size:11px;font-weight:800;letter-spacing:.1em}
        .guide-cover{height:118px;border-radius:13px;background:linear-gradient(135deg,#1b55aa,#3789df);padding:22px;color:#fff;position:relative;overflow:hidden;margin-bottom:22px}
        .guide-cover:before,.guide-cover:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.28);transform:rotate(-20deg)}
        .guide-cover:before{width:190px;height:190px;right:-48px;top:-85px;border-radius:50%}
        .guide-cover:after{width:130px;height:130px;right:22px;bottom:-72px;border-radius:50%}
        .guide-cover strong{display:block;font-size:21px;position:relative;z-index:1}
        .guide-cover small{position:relative;z-index:1;opacity:.82}
        .panel-title{font-weight:800}
        .panel-row{display:flex;justify-content:space-between;align-items:center;padding:15px 0;border-bottom:1px solid #edf2f7;gap:14px}
        .panel-row:last-child{border-bottom:0;padding-bottom:2px}
        .panel-row small{display:block;color:var(--muted);font-size:12px}
        .tag{display:inline-flex;align-items:center;border-radius:6px;padding:3px 8px;background:var(--blue-soft);color:var(--blue-dark);font-size:11px;font-weight:700}
        .tag.green{background:#e8f5f0;color:#26765f}
        .tag.orange{background:#fff2e5;color:#9a5d2d}
        .section{padding:76px 0}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:30px}
        .section-head p{margin:9px 0 0;color:var(--muted);max-width:670px}
        .section-link{color:var(--blue);font-size:14px;font-weight:700;white-space:nowrap}
        .section-link:hover{color:var(--blue-dark)}
        .index-bar{display:flex;flex-wrap:wrap;gap:9px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;margin-bottom:24px}
        .index-bar a{padding:8px 13px;border-radius:8px;color:var(--muted);font-size:13px;transition:.2s}
        .index-bar a:hover,.index-bar a.selected{background:var(--blue-soft);color:var(--blue-dark);font-weight:700}
        .feature-layout{display:grid;grid-template-columns:1.08fr .92fr;gap:20px}
        .feature-card,.guide-item,.note-card,.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(36,70,110,.05);transition:.22s ease}
        .feature-card{padding:32px;min-height:305px;background:linear-gradient(145deg,#fff,#f4f8ff)}
        .feature-card h3{font-size:1.8rem;margin:16px 0 10px}
        .feature-card p,.guide-item p,.note-card p{color:var(--muted);font-size:14px}
        .card-index{font-size:11px;color:var(--blue);font-weight:800;letter-spacing:.12em}
        .item-stack{display:flex;flex-direction:column;gap:12px}
        .guide-item{padding:20px 22px;display:flex;justify-content:space-between;align-items:center;gap:20px}
        .guide-item:hover{transform:translateX(4px);box-shadow:var(--shadow-hover)}
        .guide-item h3{font-size:1.08rem;margin:8px 0 4px}
        .item-arrow{font-size:22px;color:var(--blue);transition:.2s;flex:none}
        .guide-item:hover .item-arrow{transform:translateX(5px)}
        .route-section{background:#eef5ff;border-top:1px solid #dae8f8;border-bottom:1px solid #dae8f8}
        .route-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
        .route-card{background:#fff;border:1px solid #d7e5f5;border-radius:var(--radius-sm);padding:23px;position:relative}
        .route-number{color:var(--blue);font-weight:800;font-size:12px;letter-spacing:.1em}
        .route-card h3{margin:12px 0 7px;font-size:1.15rem}
        .route-card p{font-size:14px;color:var(--muted);margin:0}
        .route-card a{display:inline-block;color:var(--blue);font-size:13px;font-weight:700;margin-top:17px}
        .note-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:22px;align-items:stretch}
        .note-card{padding:30px}
        .note-card h2{margin-top:10px}
        .note-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
        .note-row{padding:19px;border:1px solid var(--line);background:#fff;border-radius:13px}
        .note-row strong{display:block;margin-bottom:5px}
        .note-row span{font-size:13px;color:var(--muted)}
        .faq-layout{display:grid;grid-template-columns:.68fr 1.32fr;gap:50px}
        .faq-intro p{color:var(--muted);font-size:15px}
        .accordion-item{border:1px solid var(--line)!important;border-radius:12px!important;overflow:hidden;margin-bottom:10px;background:#fff}
        .accordion-button{font-weight:700;color:var(--ink);background:#fff;box-shadow:none!important;padding:18px 20px}
        .accordion-button:not(.collapsed){color:var(--blue-dark);background:var(--blue-soft)}
        .accordion-body{color:var(--muted);font-size:14px;padding:0 20px 19px;background:var(--blue-soft)}
        .contact-section{padding:68px 0}
        .contact-card{padding:32px;background:linear-gradient(120deg,#f0f6ff,#fff)}
        .contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:40px;align-items:center}
        .contact-copy p{color:var(--muted);font-size:14px}
        .form-control,.form-select{min-height:48px;border:1px solid var(--line-strong);border-radius:9px;color:var(--ink);background:#fff}
        .form-control:hover,.form-select:hover{border-color:#9eb9dd}
        .form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 .2rem rgba(36,104,214,.12)}
        textarea.form-control{min-height:92px;resize:vertical}
        .form-label{font-size:13px;font-weight:700;margin-bottom:7px}
        .form-note{font-size:12px;color:var(--muted);margin:13px 0 0}
        .site-footer{background:#edf3fa;border-top:1px solid #dbe6f2;padding:50px 0 22px}
        .footer-grid{display:grid;grid-template-columns:1.5fr .7fr .8fr;gap:50px}
        .footer-brand{margin-bottom:16px}
        .footer-copy{color:var(--muted);font-size:14px;max-width:410px;margin:0}
        .footer-title{font-weight:800;margin-bottom:13px}
        .footer-links{display:flex;flex-direction:column;gap:8px;color:var(--muted);font-size:14px}
        .footer-links a:hover{color:var(--blue)}
        .copyright{border-top:1px solid #d6e2ef;margin-top:36px;padding-top:17px;display:flex;justify-content:space-between;gap:18px;color:#73849a;font-size:12px}
        .notice{color:#7d8896}
        .status-line{display:flex;align-items:center;gap:7px;color:var(--green);font-size:12px;font-weight:700}
        .status-dot{width:7px;height:7px;background:#4eb38e;border-radius:50%;display:inline-block}
        @media(max-width:992px){
            .hero-layout,.feature-layout,.note-layout,.faq-layout,.contact-grid{grid-template-columns:1fr}
            .hero-layout{gap:35px}.metric-grid{grid-template-columns:repeat(2,1fr)}
            .footer-grid{grid-template-columns:1.2fr 1fr 1fr}
        }
        @media(max-width:768px){
            .nav-shell{min-height:68px}.menu-toggle{display:block}
            .nav-links{display:none;position:absolute;left:18px;right:18px;top:74px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
            .nav-links.open{display:flex}.nav-links a{padding:12px 14px}
            .hero{padding:57px 0 45px}.hero:before{height:480px}.section{padding:58px 0}
            .section-head{display:block}.section-link{display:inline-block;margin-top:14px}
            .route-grid{grid-template-columns:1fr}.note-list{grid-template-columns:1fr}
            .footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-grid>div:first-child{grid-column:1/-1}
            .copyright{display:block}.notice{display:block;margin-top:8px}
        }
        @media(max-width:576px){
            .container{padding-left:16px;padding-right:16px}.brand-name{font-size:16px}
            .hero h1{font-size:2.35rem}.hero-copy{font-size:16px}
            .metric-grid{grid-template-columns:1fr 1fr;gap:10px}.guide-card,.feature-card,.note-card,.contact-card{padding:22px}
            .guide-item{padding:17px}.footer-grid{grid-template-columns:1fr}
            .footer-grid>div:first-child{grid-column:auto}
        }