/* roulang page: index */
:root{
            --color-bg:#f4f7fb;
            --color-surface:#ffffff;
            --color-surface-soft:#eaf2fb;
            --color-text:#172338;
            --color-muted:#687891;
            --color-primary:#1769e0;
            --color-primary-hover:#0d54bd;
            --color-accent:#39c5d8;
            --color-dark-nav:#0d172b;
            --color-border:#dce5f0;
            --shadow-card:0 16px 40px rgba(30,65,112,.10);
            --shadow-hover:0 22px 48px rgba(23,105,224,.18);
            --radius-sm:8px;
            --radius-md:14px;
            --radius-lg:24px;
            --container-width:1220px;
            --section-gap:104px;
        }
        *,*::before,*::after{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            background:var(--color-bg);
            color:var(--color-text);
            font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei",Arial,sans-serif;
            font-size:16px;
            line-height:1.75;
            overflow-x:hidden;
        }
        img{max-width:100%;height:auto;display:block}
        a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease}
        button,input,select{font:inherit}
        button{cursor:pointer}
        :focus-visible{outline:3px solid rgba(57,197,216,.7);outline-offset:3px}
        .container{max-width:var(--container-width);padding-left:24px;padding-right:24px}
        .site-header{
            position:sticky;top:0;z-index:1000;
            background:var(--color-dark-nav);
            border-top:3px solid var(--color-accent);
            box-shadow:0 8px 24px rgba(8,19,39,.18);
        }
        .navbar{min-height:76px}
        .brand{
            display:inline-flex;align-items:center;gap:12px;color:#fff!important;
            font-weight:800;letter-spacing:.02em;font-size:18px;white-space:nowrap
        }
        .brand-mark{
            width:30px;height:30px;display:grid;place-items:center;
            background:var(--color-primary);border:2px solid var(--color-accent);
            border-radius:7px;color:#fff;font-family:monospace;font-size:13px;
            box-shadow:4px 4px 0 rgba(57,197,216,.2)
        }
        .brand small{display:block;color:#91a5c3;font-size:11px;font-weight:500;letter-spacing:.08em}
        .navbar-nav{gap:8px}
        .nav-link{
            color:#aebdd3!important;padding:10px 15px!important;border-radius:9px;
            font-size:14px;position:relative
        }
        .nav-link:hover,.nav-link:focus{color:#fff!important;background:rgba(255,255,255,.07)}
        .nav-link.active{color:#fff!important;background:rgba(23,105,224,.26)}
        .nav-link.active::after{
            content:"";position:absolute;left:15px;right:15px;bottom:4px;height:2px;
            background:var(--color-accent);box-shadow:0 0 10px var(--color-accent)
        }
        .nav-action{
            background:var(--color-primary);color:#fff!important;border-radius:9px;
            padding:11px 17px!important;margin-left:8px
        }
        .nav-action:hover{background:var(--color-primary-hover);transform:translateY(-2px)}
        .navbar-toggler{border:1px solid #526886;padding:8px 10px}
        .navbar-toggler:focus{box-shadow:0 0 0 3px rgba(57,197,216,.25)}
        .hero{
            position:relative;min-height:620px;display:flex;align-items:center;
            background:#101d35;overflow:hidden;color:#fff
        }
        .hero::before{
            content:"";position:absolute;inset:0;opacity:.18;
            background-image:linear-gradient(rgba(96,166,233,.3) 1px,transparent 1px),linear-gradient(90deg,rgba(96,166,233,.3) 1px,transparent 1px);
            background-size:36px 36px;
        }
        .hero::after{
            content:"";position:absolute;width:520px;height:520px;right:-160px;top:-180px;
            border:1px solid rgba(57,197,216,.5);box-shadow:0 0 0 18px rgba(57,197,216,.04),0 0 0 40px rgba(57,197,216,.03);
            transform:rotate(45deg)
        }
        .hero .container{position:relative;z-index:1}
        .hero-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:72px;align-items:center;padding:86px 0}
        .eyebrow,.section-kicker{
            display:inline-flex;align-items:center;gap:8px;color:var(--color-accent);
            font-size:12px;font-weight:800;letter-spacing:.16em;text-transform:uppercase
        }
        .eyebrow::before,.section-kicker::before{content:"";width:24px;height:2px;background:currentColor}
        .hero h1{font-size:clamp(42px,5vw,70px);line-height:1.16;letter-spacing:-.04em;margin:18px 0 22px;font-weight:850}
        .hero h1 span{color:#6de0ec}
        .hero-copy{max-width:650px;color:#c1d0e5;font-size:18px}
        .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}
        .btn-primary-custom,.btn-outline-custom{
            display:inline-flex;align-items:center;justify-content:center;gap:8px;
            min-height:48px;padding:12px 20px;border-radius:10px;font-weight:700;
            border:1px solid transparent;transition:all .22s ease
        }
        .btn-primary-custom{background:var(--color-primary);color:#fff;box-shadow:0 8px 20px rgba(23,105,224,.25)}
        .btn-primary-custom:hover{background:#3985ed;color:#fff;transform:translateY(-3px);box-shadow:0 14px 28px rgba(23,105,224,.34)}
        .btn-outline-custom{background:transparent;color:#d8faff;border-color:#537694}
        .btn-outline-custom:hover{background:rgba(57,197,216,.1);border-color:var(--color-accent);color:#fff;transform:translateY(-3px)}
        .hero-points{display:flex;gap:28px;flex-wrap:wrap;margin-top:38px}
        .hero-point strong{display:block;color:#fff;font-size:22px}.hero-point small{color:#9eb2cc}
        .hero-stage{position:relative;min-height:350px;display:flex;align-items:center;justify-content:center}
        .index-board{
            width:min(100%,420px);padding:23px;background:#182945;border:1px solid #43617f;
            border-radius:18px;box-shadow:20px 24px 0 rgba(5,13,28,.22),0 0 40px rgba(57,197,216,.12);
            transform:rotate(2deg)
        }
        .board-top{display:flex;justify-content:space-between;color:#91a9c5;font-size:12px;border-bottom:1px solid #304965;padding-bottom:15px;margin-bottom:15px}
        .board-line{display:flex;gap:12px;align-items:flex-start;padding:13px 0;border-bottom:1px dashed #36516d}
        .board-line:last-child{border:0}.board-no{color:var(--color-accent);font-family:monospace;font-size:12px}
        .board-line b{display:block;font-size:15px;color:#eef7ff}.board-line span{display:block;color:#94a9c2;font-size:12px}
        .pixel-tag{display:inline-block;padding:3px 8px;background:#dff8fa;color:#087a8d;border-radius:5px;font-size:12px;font-weight:700}
        .section{padding:var(--section-gap) 0}
        .section-soft{background:var(--color-surface-soft)}
        .section-head{max-width:700px;margin-bottom:42px}
        .section h2{font-size:clamp(29px,3.5vw,46px);line-height:1.25;letter-spacing:-.03em;margin:12px 0 14px;font-weight:800}
        .section-lead{color:var(--color-muted);font-size:17px;margin:0}
        .pain-grid{display:grid;grid-template-columns:1fr 1.35fr;gap:70px;align-items:start}
        .pain-intro{font-size:22px;line-height:1.5;font-weight:700;max-width:390px}
        .number-list{border-top:1px solid var(--color-border)}
        .number-item{display:grid;grid-template-columns:58px 1fr;gap:18px;padding:23px 0;border-bottom:1px solid var(--color-border)}
        .number{color:var(--color-primary);font-family:monospace;font-weight:800;font-size:14px;padding-top:5px}
        .number-item h3{font-size:19px;margin:0 0 4px}.number-item p{color:var(--color-muted);margin:0;font-size:14px}
        .solution-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:20px}
        .solution-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:28px;box-shadow:var(--shadow-card);transition:.22s}
        .solution-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#a9c8ef}
        .solution-card:nth-child(1){grid-column:span 7}.solution-card:nth-child(2){grid-column:span 5}.solution-card:nth-child(3){grid-column:span 5}.solution-card:nth-child(4){grid-column:span 7}
        .icon-box{width:42px;height:42px;display:grid;place-items:center;background:#e6f1ff;color:var(--color-primary);border-radius:10px;font-size:20px;margin-bottom:24px}
        .solution-card h3{font-size:21px;margin:0 0 8px}.solution-card p{color:var(--color-muted);font-size:14px;margin:0 0 18px}
        .result-wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:center}
        .result-panel{background:var(--color-dark-nav);color:#fff;border-radius:18px;padding:34px;box-shadow:var(--shadow-card)}
        .result-panel h3{font-size:24px;margin:0 0 25px}.result-row{display:flex;justify-content:space-between;gap:20px;margin:20px 0 8px;font-size:14px;color:#b8c9dc}
        .progress{height:8px;background:#2a3d59;border-radius:20px;overflow:hidden}.progress-bar{background:var(--color-accent);border-radius:20px}
        .result-copy h3{font-size:26px;margin-bottom:14px}.result-copy p{color:var(--color-muted)}
        .result-points{list-style:none;padding:0;margin:25px 0 0}.result-points li{padding:9px 0;color:#40516a}.result-points i{color:var(--color-primary);margin-right:10px}
        .category-band{background:#e8f1fb;border-top:1px solid #d8e6f4;border-bottom:1px solid #d8e6f4}
        .category-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px;align-items:center}
        .category-links{display:grid;grid-template-columns:1fr 1fr;gap:14px}
        .category-link{background:#fff;padding:22px;border:1px solid var(--color-border);border-radius:13px;box-shadow:0 8px 22px rgba(31,70,110,.06)}
        .category-link:hover{transform:translateY(-3px);border-color:#8bb9ed;box-shadow:var(--shadow-hover)}
        .category-link strong{display:block;font-size:17px;margin:8px 0}.category-link span{color:var(--color-muted);font-size:13px}
        .category-link i{color:var(--color-primary)}
        .insight-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:24px}
        .insight-main,.insight-side{background:#fff;border:1px solid var(--color-border);border-radius:16px;padding:28px;box-shadow:var(--shadow-card)}
        .insight-main{background:var(--color-dark-nav);color:#fff}.insight-main h3{font-size:28px;line-height:1.35;margin:18px 0}.insight-main p{color:#b8c9dc}
        .article-link{display:flex;justify-content:space-between;gap:16px;padding:16px 0;border-bottom:1px solid var(--color-border);font-weight:700}
        .article-link:last-child{border-bottom:0}.article-link:hover{color:var(--color-primary)}
        .article-link small{color:var(--color-muted);font-weight:400;white-space:nowrap}
        .quote-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px;align-items:stretch}
        .quote-card{background:#fff;border:1px solid var(--color-border);border-radius:16px;padding:28px;box-shadow:var(--shadow-card)}
        .quote-card:first-child{transform:translateY(18px)}.quote-card p{font-size:17px;margin:0 0 25px}.quote-card footer{color:var(--color-muted);font-size:13px}
        .faq-section{background:#fff}.accordion{--bs-accordion-border-color:var(--color-border);--bs-accordion-bg:#fff;--bs-accordion-btn-focus-box-shadow:0 0 0 3px rgba(23,105,224,.12)}
        .accordion-item{border-radius:10px!important;margin-bottom:12px;overflow:hidden;border:1px solid var(--color-border)!important}
        .accordion-button{font-weight:700;color:var(--color-text);padding:20px 22px;background:#fff}
        .accordion-button:not(.collapsed){background:#edf5ff;color:var(--color-primary);box-shadow:none}
        .accordion-body{color:var(--color-muted);padding:0 22px 21px;font-size:14px}
        .cta{padding:72px 0;background:var(--color-primary);color:#fff;position:relative;overflow:hidden}
        .cta::after{content:"// 浏览入口";position:absolute;right:8%;top:35%;font-family:monospace;font-size:42px;color:rgba(255,255,255,.08)}
        .cta-inner{display:flex;justify-content:space-between;align-items:center;gap:30px;position:relative;z-index:1}
        .cta h2{font-size:34px;margin:0 0 10px}.cta p{margin:0;color:#d8e9ff}.cta .btn-primary-custom{background:#fff;color:var(--color-primary)}
        .cta .btn-primary-custom:hover{background:#e9f8ff;color:var(--color-primary)}
        .site-footer{background:#0b1528;color:#a9bad0;padding:58px 0 25px;border-top:2px solid #223e60}
        .footer-grid{display:grid;grid-template-columns:1.3fr .7fr .7fr;gap:50px;padding-bottom:38px}
        .footer-title{color:#fff;font-weight:800;margin-bottom:15px}.footer-text{font-size:13px;max-width:370px}
        .footer-links{list-style:none;padding:0;margin:0}.footer-links li{margin:8px 0;font-size:13px}.footer-links a:hover{color:var(--color-accent)}
        .footer-bottom{border-top:1px solid #263b56;padding-top:20px;font-size:12px;display:flex;justify-content:space-between;gap:20px}
        @media (max-width:991px){
            :root{--section-gap:78px}.hero-layout,.pain-grid,.result-wrap,.category-layout{grid-template-columns:1fr;gap:42px}
            .hero-layout{padding:70px 0}.hero-stage{min-height:300px}.quote-grid{grid-template-columns:1fr 1fr}.quote-card:first-child{transform:none}
            .footer-grid{grid-template-columns:1fr 1fr}.navbar-collapse{background:var(--color-dark-nav);padding:15px 0}.nav-action{margin:8px 0 0}
        }
        @media (max-width:767px){
            .container{padding-left:18px;padding-right:18px}.hero{min-height:auto}.hero h1{font-size:42px}.hero-copy{font-size:16px}
            .hero-points{gap:18px}.solution-card:nth-child(n){grid-column:span 12}.category-links,.quote-grid,.insight-grid{grid-template-columns:1fr}
            .cta-inner{display:block}.cta h2{font-size:29px;margin-bottom:20px}.cta::after{display:none}
        }
        @media (max-width:520px){
            .brand{font-size:15px}.brand small{display:none}.hero h1{font-size:35px}.section{padding:64px 0}
            .hero-actions .btn-primary-custom,.hero-actions .btn-outline-custom{width:100%}.footer-grid{grid-template-columns:1fr}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:8px}
            .index-board{transform:none}.pain-intro{font-size:20px}
        }
        @media (prefers-reduced-motion:reduce){
            *,*::before,*::after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}
        }

/* roulang page: category1 */
:root{
      --color-bg:#f4f7fb;
      --color-surface:#fff;
      --color-surface-soft:#eaf2fb;
      --color-text:#172338;
      --color-muted:#687891;
      --color-primary:#1769e0;
      --color-primary-hover:#0d54bd;
      --color-accent:#39c5d8;
      --color-dark-nav:#0d172b;
      --color-border:#dce5f0;
      --shadow-card:0 16px 40px rgba(30,65,112,.10);
      --shadow-hover:0 22px 48px rgba(23,105,224,.18);
      --radius-sm:8px;
      --radius-md:14px;
      --radius-lg:24px;
      --container-width:1220px;
      --section-gap:88px;
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.75;overflow-x:hidden}
    img{max-width:100%;height:auto;display:block}
    a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease}
    button,input,select{font:inherit}
    button{cursor:pointer}
    :focus-visible{outline:3px solid rgba(57,197,216,.65);outline-offset:3px}
    .container{max-width:var(--container-width);padding-left:24px;padding-right:24px}
    .site-header{position:sticky;top:0;z-index:1000;background:var(--color-dark-nav);border-top:3px solid var(--color-accent);box-shadow:0 8px 24px rgba(8,19,39,.18)}
    .navbar{min-height:76px}
    .brand{display:inline-flex;align-items:center;gap:12px;color:#fff!important;font-weight:800;letter-spacing:.02em;font-size:18px;white-space:nowrap}
    .brand-mark{width:30px;height:30px;display:grid;place-items:center;background:var(--color-primary);border:2px solid var(--color-accent);border-radius:7px;color:#fff;font-family:monospace;font-size:13px;box-shadow:4px 4px 0 rgba(57,197,216,.2)}
    .brand small{display:block;color:#91a5c3;font-size:11px;font-weight:500;letter-spacing:.08em}
    .navbar-nav{gap:8px}
    .nav-link{color:#aebdd3!important;padding:10px 15px!important;border-radius:9px;font-size:14px;position:relative}
    .nav-link:hover,.nav-link:focus{color:#fff!important;background:rgba(255,255,255,.07)}
    .nav-link.active{color:#fff!important;background:rgba(23,105,224,.26)}
    .nav-link.active::after{content:"";position:absolute;left:15px;right:15px;bottom:4px;height:2px;background:var(--color-accent);box-shadow:0 0 10px var(--color-accent)}
    .nav-action{background:var(--color-primary);color:#fff!important;border-radius:9px;padding:11px 17px!important;margin-left:8px}
    .nav-action:hover{background:var(--color-primary-hover);transform:translateY(-2px)}
    .navbar-toggler{border:1px solid #526886;padding:8px 10px}
    .navbar-toggler:focus{box-shadow:0 0 0 3px rgba(57,197,216,.25)}
    .page-hero{position:relative;overflow:hidden;background:#101d35;color:#fff;padding:82px 0 76px}
    .page-hero:before{content:"";position:absolute;inset:0;opacity:.18;background-image:linear-gradient(rgba(96,166,233,.3) 1px,transparent 1px),linear-gradient(90deg,rgba(96,166,233,.3) 1px,transparent 1px);background-size:36px 36px}
    .page-hero:after{content:"";position:absolute;width:380px;height:380px;right:-110px;top:-180px;border:1px solid rgba(57,197,216,.48);transform:rotate(45deg);box-shadow:0 0 0 18px rgba(57,197,216,.04),0 0 0 40px rgba(57,197,216,.03)}
    .page-hero .container{position:relative;z-index:1}
    .breadcrumb{--bs-breadcrumb-divider-color:#6d87a7;margin:0 0 24px;font-size:13px}
    .breadcrumb-item,.breadcrumb-item a{color:#9eb2cc}
    .breadcrumb-item.active{color:#d9f7fa}
    .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--color-accent);font-size:12px;font-weight:800;letter-spacing:.16em}
    .eyebrow:before,.section-kicker:before{content:"";width:24px;height:2px;background:currentColor}
    .page-hero h1{font-size:clamp(38px,5vw,64px);line-height:1.18;letter-spacing:-.04em;margin:16px 0 18px;font-weight:850}
    .page-hero h1 span{color:#6de0ec}
    .hero-summary{max-width:760px;color:#c1d0e5;font-size:18px;margin:0}
    .hero-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}
    .meta-chip,.pixel-tag{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:6px;font-size:12px;font-weight:700}
    .meta-chip{color:#c9f8fb;border:1px solid rgba(57,197,216,.45);background:rgba(57,197,216,.08)}
    .pixel-tag{background:#dff8fa;color:#087a8d}
    .section{padding:var(--section-gap) 0}
    .section-soft{background:var(--color-surface-soft)}
    .section-head{max-width:760px;margin-bottom:38px}
    .section h2{font-size:clamp(29px,3.5vw,46px);line-height:1.25;letter-spacing:-.03em;margin:12px 0 14px;font-weight:800}
    .section-lead{color:var(--color-muted);font-size:17px;margin:0}
    .info-bar{margin-top:-34px;position:relative;z-index:2;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-card);padding:22px 26px;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .info-cell{display:flex;gap:14px;align-items:flex-start;border-right:1px solid var(--color-border);padding-right:20px}
    .info-cell:last-child{border-right:0}
    .info-icon{width:40px;height:40px;flex:0 0 40px;display:grid;place-items:center;border-radius:10px;background:var(--color-surface-soft);color:var(--color-primary);font-size:20px}
    .info-cell strong{display:block;font-size:15px}.info-cell span{display:block;color:var(--color-muted);font-size:13px}
    .feature-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:stretch}
    .feature-card,.index-panel,.faq-wrap,.cta-box{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-card)}
    .feature-card{padding:38px;position:relative;overflow:hidden}
    .feature-card:after{content:"01";position:absolute;right:26px;top:18px;color:#e5eef8;font:800 72px/1 monospace}
    .feature-card h3{font-size:29px;max-width:570px;margin:20px 0 13px;position:relative;z-index:1}
    .feature-card p{color:var(--color-muted);max-width:620px;position:relative;z-index:1}
    .feature-link{display:inline-flex;align-items:center;gap:8px;color:var(--color-primary);font-weight:800;margin-top:13px}
    .feature-link:hover{color:var(--color-primary-hover);gap:12px}
    .index-panel{padding:28px;background:#f9fbfe}
    .index-panel h3{font-size:20px;margin:0 0 20px}
    .index-line{display:flex;gap:13px;padding:15px 0;border-top:1px solid var(--color-border)}
    .index-line:last-child{border-bottom:1px solid var(--color-border)}
    .index-no{color:var(--color-primary);font:700 13px monospace;padding-top:3px}
    .index-line strong{display:block;font-size:15px}.index-line span{display:block;color:var(--color-muted);font-size:13px}
    .filter-box{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:22px;margin-bottom:24px;box-shadow:0 8px 24px rgba(30,65,112,.06)}
    .form-label{font-size:13px;font-weight:700;color:var(--color-text);margin-bottom:7px}
    .form-control,.form-select{border:1px solid var(--color-border);border-radius:9px;min-height:46px;color:var(--color-text);background:#fff}
    .form-control:focus,.form-select:focus{border-color:var(--color-primary);box-shadow:0 0 0 4px rgba(23,105,224,.12)}
    .btn-primary-custom{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 18px;border:1px solid transparent;border-radius:10px;background:var(--color-primary);color:#fff;font-weight:700;transition:all .22s ease}
    .btn-primary-custom:hover{background:var(--color-primary-hover);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(23,105,224,.24)}
    .btn-primary-custom:active{transform:translateY(0)}
    .result-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:32px}
    .result-list{display:grid;gap:14px}
    .result-item{display:grid;grid-template-columns:62px 1fr auto;gap:18px;align-items:center;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px 22px;box-shadow:0 8px 22px rgba(30,65,112,.05);transition:all .22s ease}
    .result-item:hover{transform:translateY(-3px);border-color:#a8c8ef;box-shadow:var(--shadow-hover)}
    .result-number{width:48px;height:48px;display:grid;place-items:center;border-radius:10px;background:#e9f2ff;color:var(--color-primary);font:800 15px monospace}
    .result-item h3{font-size:18px;margin:0 0 5px}.result-item p{color:var(--color-muted);font-size:14px;margin:0}
    .result-side{background:#132541;color:#fff;border-radius:var(--radius-lg);padding:30px;position:relative;overflow:hidden}
    .result-side:before{content:"";position:absolute;inset:auto -30px -70px auto;width:190px;height:190px;border:1px solid rgba(57,197,216,.5);transform:rotate(45deg)}
    .result-side h3{font-size:24px;margin:0 0 18px;position:relative}.result-side p{color:#b9c9df;font-size:14px;position:relative}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px;position:relative}.tag-cloud span{padding:7px 10px;border:1px solid #426080;border-radius:7px;color:#d4f8fa;font-size:13px}
    .faq-wrap{padding:18px 26px}.accordion-item{border:0;border-bottom:1px solid var(--color-border)!important;background:transparent}.accordion-item:last-child{border-bottom:0!important}
    .accordion-button{background:transparent!important;color:var(--color-text)!important;box-shadow:none!important;font-weight:750;padding:20px 4px;font-size:16px}
    .accordion-button:after{background-image:none;content:"+";font-size:23px;color:var(--color-primary);font-weight:400;width:auto;height:auto}
    .accordion-button:not(.collapsed):after{content:"−"}.accordion-body{color:var(--color-muted);font-size:14px;padding:0 36px 20px 4px}
    .cta-box{padding:46px 50px;display:flex;justify-content:space-between;align-items:center;gap:28px;background:#e8f3ff;border-color:#c4daf4}
    .cta-box h2{font-size:32px;margin:0 0 8px}.cta-box p{margin:0;color:var(--color-muted)}
    footer{background:#0d172b;color:#aebdd3;border-top:2px solid rgba(57,197,216,.45);padding:52px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:40px;padding-bottom:38px;border-bottom:1px solid #263854}
    .footer-brand{color:#fff;font-size:20px;font-weight:800}.footer-copy{color:#8da1bd;font-size:14px;max-width:340px;margin:13px 0 0}
    .footer-title{color:#fff;font-size:14px;font-weight:800;margin-bottom:13px}.footer-links{display:grid;gap:8px;font-size:14px}.footer-links a:hover{color:#6de0ec}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;padding-top:20px;font-size:12px;color:#7f93ae}
    .footer-mark{display:inline-block;width:20px;height:3px;background:var(--color-accent);box-shadow:8px 0 0 var(--color-primary);margin-right:10px;vertical-align:middle}
    .empty-state{display:none;text-align:center;color:var(--color-muted);padding:25px;border:1px dashed #b8cbe2;border-radius:var(--radius-md);background:#fbfdff}
    @media (max-width:992px){
      .navbar-collapse{background:var(--color-dark-nav);padding:14px 0 18px}.navbar-nav{gap:2px}.nav-link{padding:12px 15px!important}.nav-action{margin:8px 15px 0}
      .feature-layout,.result-layout{grid-template-columns:1fr}.info-bar{grid-template-columns:1fr}.info-cell{border-right:0;border-bottom:1px solid var(--color-border);padding:0 0 16px}.info-cell:last-child{border-bottom:0;padding-bottom:0}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:768px){
      :root{--section-gap:64px}.container{padding-left:18px;padding-right:18px}.page-hero{padding:62px 0}.page-hero h1{font-size:42px}.hero-summary{font-size:16px}
      .feature-card{padding:28px}.result-item{grid-template-columns:48px 1fr}.result-item .feature-link{grid-column:2}.cta-box{padding:34px 26px;display:block}.cta-box .btn-primary-custom{margin-top:22px}
    }
    @media (max-width:576px){
      .brand{font-size:15px;gap:8px}.brand small{font-size:9px}.brand-mark{width:27px;height:27px}.page-hero h1{font-size:35px}.info-bar{padding:20px}.filter-box{padding:18px}.footer-grid{grid-template-columns:1fr;gap:28px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:8px}
    }
    @media (prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}

/* roulang page: category2 */
:root{
 --color-bg:#f4f7fb;
 --color-surface:#fff;
 --color-surface-soft:#eaf2fb;
 --color-text:#172338;
 --color-muted:#687891;
 --color-primary:#1769e0;
 --color-primary-hover:#0d54bd;
 --color-accent:#39c5d8;
 --color-dark-nav:#0d172b;
 --color-border:#dce5f0;
 --shadow-card:0 16px 40px rgba(30,65,112,.10);
 --shadow-hover:0 22px 48px rgba(23,105,224,.18);
 --radius-sm:8px;
 --radius-md:14px;
 --radius-lg:24px;
 --container-width:1220px;
 --section-gap:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.75;overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease}
button,input,select{font:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid rgba(57,197,216,.8);outline-offset:3px}
.container{max-width:var(--container-width);padding-left:24px;padding-right:24px}
.site-header{position:sticky;top:0;z-index:1000;background:var(--color-dark-nav);border-top:3px solid var(--color-accent);box-shadow:0 8px 24px rgba(8,19,39,.18)}
.navbar{min-height:76px}
.brand{display:inline-flex;align-items:center;gap:12px;color:#fff!important;font-weight:800;letter-spacing:.02em;font-size:18px;white-space:nowrap}
.brand-mark{width:30px;height:30px;display:grid;place-items:center;background:var(--color-primary);border:2px solid var(--color-accent);border-radius:7px;color:#fff;font-family:monospace;font-size:13px;box-shadow:4px 4px 0 rgba(57,197,216,.2)}
.brand small{display:block;color:#91a5c3;font-size:11px;font-weight:500;letter-spacing:.08em}
.navbar-nav{gap:8px}
.nav-link{color:#aebdd3!important;padding:10px 15px!important;border-radius:9px;font-size:14px;position:relative}
.nav-link:hover,.nav-link:focus{color:#fff!important;background:rgba(255,255,255,.07)}
.nav-link.active{color:#fff!important;background:rgba(23,105,224,.26)}
.nav-link.active::after{content:"";position:absolute;left:15px;right:15px;bottom:4px;height:2px;background:var(--color-accent);box-shadow:0 0 10px var(--color-accent)}
.nav-action{background:var(--color-primary);color:#fff!important;border-radius:9px;padding:11px 17px!important;margin-left:8px}
.nav-action:hover{background:var(--color-primary-hover);transform:translateY(-2px)}
.navbar-toggler{border:1px solid #526886;padding:8px 10px}
.navbar-toggler:focus{box-shadow:0 0 0 3px rgba(57,197,216,.25)}
.topic-hero{background:#101d35;color:#fff;position:relative;overflow:hidden;padding:74px 0 70px}
.topic-hero:before{content:"";position:absolute;inset:0;opacity:.16;background-image:linear-gradient(rgba(96,166,233,.3) 1px,transparent 1px),linear-gradient(90deg,rgba(96,166,233,.3) 1px,transparent 1px);background-size:36px 36px}
.topic-hero:after{content:"";position:absolute;width:380px;height:380px;right:7%;top:-210px;border:1px solid rgba(57,197,216,.5);transform:rotate(45deg);box-shadow:0 0 0 18px rgba(57,197,216,.04),0 0 0 40px rgba(57,197,216,.03)}
.topic-hero .container{position:relative;z-index:1}
.breadcrumb{--bs-breadcrumb-divider-color:#7c94b2;margin-bottom:28px}
.breadcrumb-item,.breadcrumb-item a{color:#91a5c3;font-size:13px}
.breadcrumb-item.active{color:#d9f8fb}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:70px;align-items:center}
.eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--color-accent);font-size:12px;font-weight:800;letter-spacing:.16em}
.eyebrow:before,.section-kicker:before{content:"";width:24px;height:2px;background:currentColor}
.topic-hero h1{font-size:clamp(38px,5vw,66px);line-height:1.18;letter-spacing:-.04em;margin:18px 0 20px;font-weight:850}
.topic-hero h1 span{color:#6de0ec}
.hero-copy{max-width:650px;color:#c1d0e5;font-size:18px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.btn-primary-custom,.btn-outline-custom{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 20px;border-radius:10px;font-weight:700;border:1px solid transparent;transition:all .22s ease}
.btn-primary-custom{background:var(--color-primary);color:#fff;box-shadow:0 8px 20px rgba(23,105,224,.25)}
.btn-primary-custom:hover{background:#3985ed;color:#fff;transform:translateY(-3px);box-shadow:0 14px 28px rgba(23,105,224,.34)}
.btn-outline-custom{background:transparent;color:#d8faff;border-color:#537694}
.btn-outline-custom:hover{background:rgba(57,197,216,.1);border-color:var(--color-accent);color:#fff;transform:translateY(-3px)}
.topic-panel{background:#f7fbff;color:var(--color-text);border:1px solid #8eb4db;border-radius:18px;padding:24px;box-shadow:12px 12px 0 rgba(57,197,216,.18),0 22px 48px rgba(0,0,0,.22)}
.panel-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--color-border);padding-bottom:16px;margin-bottom:18px}
.pixel-tag{display:inline-block;padding:3px 8px;background:#dff8fa;color:#087a8d;border-radius:5px;font-size:12px;font-weight:700}
.panel-title{font-size:20px;font-weight:800;margin:0}
.topic-row{display:flex;align-items:center;gap:12px;padding:13px 0;border-bottom:1px dashed #cbd9e8}
.topic-row:last-child{border-bottom:0}
.topic-no{width:28px;height:28px;display:grid;place-items:center;background:#eaf2fb;color:var(--color-primary);border-radius:6px;font:700 12px monospace}
.topic-row strong{display:block;font-size:15px}
.topic-row small{color:var(--color-muted)}
.section{padding:var(--section-gap) 0}
.section-soft{background:var(--color-surface-soft)}
.section-head{max-width:730px;margin-bottom:40px}
.section h2{font-size:clamp(29px,3.5vw,46px);line-height:1.25;letter-spacing:-.03em;margin:12px 0 14px;font-weight:800}
.section-lead{color:var(--color-muted);font-size:17px;margin:0}
.tag-cloud{display:flex;flex-wrap:wrap;gap:12px}
.topic-tag{display:inline-flex;align-items:center;gap:8px;background:var(--color-surface);border:1px solid var(--color-border);padding:12px 17px;border-radius:10px;color:#315273;font-weight:700;box-shadow:0 6px 18px rgba(30,65,112,.05)}
.topic-tag:hover,.topic-tag.active{color:var(--color-primary);border-color:#8db8ea;box-shadow:var(--shadow-card);transform:translateY(-3px)}
.feature-band{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);overflow:hidden}
.feature-visual{min-height:360px;background:#dcecf8;position:relative;padding:28px;display:flex;align-items:flex-end}
.feature-visual:before{content:"";position:absolute;inset:24px;background:linear-gradient(135deg,#b9d9ee,#edf7fb);border:1px solid #9fc1dd;border-radius:12px}
.visual-lines{position:relative;z-index:1;width:100%;background:rgba(255,255,255,.88);border:1px solid #c9dce9;border-radius:10px;padding:17px}
.visual-lines span{display:block;height:8px;background:#b9d5eb;border-radius:4px;margin:9px 0}
.visual-lines span:nth-child(2){width:76%;background:#78b6e8}.visual-lines span:nth-child(3){width:56%;background:#a7dfe4}
.feature-copy{padding:42px 42px 38px}
.feature-copy h3{font-size:30px;line-height:1.35;margin:14px 0}
.feature-copy p{color:var(--color-muted)}
.meta-line{display:flex;flex-wrap:wrap;gap:10px;color:var(--color-muted);font-size:13px;margin-top:20px}
.meta-line i{color:var(--color-primary)}
.index-layout{display:grid;grid-template-columns:280px 1fr;gap:48px;align-items:start}
.index-nav{position:sticky;top:110px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px;box-shadow:var(--shadow-card)}
.index-nav h3{font-size:17px;margin:0 0 16px}
.index-link{display:flex;justify-content:space-between;gap:12px;padding:11px 12px;border-radius:8px;color:#526b88;font-size:14px}
.index-link:hover,.index-link.active{background:#eaf2fb;color:var(--color-primary)}
.index-link span{color:#9aabc0;font-size:12px}
.group{margin-bottom:34px}
.group-heading{display:flex;align-items:center;justify-content:space-between;border-bottom:2px solid var(--color-text);padding-bottom:12px;margin-bottom:4px}
.group-heading h3{font-size:22px;margin:0}
.group-heading small{color:var(--color-muted)}
.topic-item{display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--color-border);padding:18px 4px}
.topic-item:hover{background:#f8fbff;padding-left:12px;padding-right:12px}
.topic-item h4{font-size:17px;margin:0 0 4px}
.topic-item p{font-size:14px;color:var(--color-muted);margin:0}
.item-side{text-align:right;white-space:nowrap}
.item-side small{display:block;color:var(--color-muted);font-size:12px;margin-bottom:5px}
.read-link{color:var(--color-primary);font-weight:700;font-size:14px}
.compare-wrap{background:#102039;color:#fff;border-radius:var(--radius-lg);padding:42px;box-shadow:var(--shadow-card)}
.compare-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:28px}
.compare-head h2{margin:0;font-size:32px}
.compare-head p{color:#aebdd3;max-width:430px;margin:0}
.compare-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#49617d;border:1px solid #49617d;border-radius:12px;overflow:hidden}
.compare-cell{background:#152943;padding:22px}
.compare-cell.title{background:#1c3656;color:#d8faff;font-weight:800}
.compare-cell strong{display:block;margin-bottom:7px}
.compare-cell span{color:#b4c4d9;font-size:14px}
.accordion-item{background:var(--color-surface);border:1px solid var(--color-border)!important;border-radius:12px!important;margin-bottom:12px;overflow:hidden;box-shadow:0 5px 16px rgba(30,65,112,.04)}
.accordion-button{background:var(--color-surface);color:var(--color-text);font-weight:700;padding:20px 22px;box-shadow:none!important}
.accordion-button:not(.collapsed){background:#eaf2fb;color:var(--color-primary)}
.accordion-button:after{background-size:14px}
.accordion-body{color:var(--color-muted);padding:0 22px 20px}
.cta{padding:68px 0;background:#dff2f6;border-top:1px solid #c4e6ec;border-bottom:1px solid #c4e6ec}
.cta-box{display:flex;align-items:center;justify-content:space-between;gap:30px}
.cta h2{margin:0 0 10px;font-size:clamp(28px,4vw,42px)}
.cta p{margin:0;color:var(--color-muted)}
.site-footer{background:var(--color-dark-nav);color:#aebdd3;padding:56px 0 24px;border-top:2px solid #23405d}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px;padding-bottom:38px;border-bottom:1px solid #2a405c}
.footer-brand{color:#fff;font-size:20px;font-weight:800;margin-bottom:12px}
.footer-copy{font-size:13px;color:#8297b4;max-width:280px}
.footer-title{color:#e8f5ff;font-size:14px;font-weight:800;margin:3px 0 14px}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin:8px 0;font-size:13px}
.footer-links a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;padding-top:20px;font-size:12px;color:#7187a5}
.pixel-rule{display:inline-block;width:34px;height:4px;background:var(--color-accent);box-shadow:8px 0 0 var(--color-primary);margin-bottom:17px}
@media(max-width:991.98px){
 .navbar-nav{padding:16px 0}.nav-action{margin:8px 0 0}.hero-grid{grid-template-columns:1fr;gap:40px}.topic-hero{padding-top:48px}.index-layout{grid-template-columns:1fr;gap:26px}.index-nav{position:static}.footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:767.98px){
 :root{--section-gap:66px}.container{padding-left:18px;padding-right:18px}.brand{font-size:15px}.brand small{font-size:9px}.topic-hero h1{font-size:40px}.hero-copy{font-size:16px}.feature-visual{min-height:250px}.feature-copy{padding:28px 24px}.feature-copy h3{font-size:25px}.compare-wrap{padding:26px 18px;overflow:hidden}.compare-head{display:block}.compare-head p{margin-top:12px}.compare-grid{grid-template-columns:1fr}.compare-cell{padding:16px}.compare-cell.title{display:none}.topic-item{align-items:flex-start}.item-side{white-space:normal}.cta-box{display:block}.cta-box .btn-primary-custom{margin-top:22px}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:8px}
}
@media(max-width:520px){
 .brand small{display:none}.topic-hero h1{font-size:34px}.hero-actions a{width:100%}.hero-actions .btn-outline-custom{background:rgba(255,255,255,.04)}.topic-panel{padding:18px}.section h2{font-size:30px}.feature-visual{min-height:205px;padding:18px}.topic-item{display:block}.item-side{text-align:left;margin-top:8px}.footer-grid{grid-template-columns:1fr}.tag-cloud{gap:8px}.topic-tag{padding:10px 12px;font-size:14px}
}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}