/* roulang page: index */
:root{
      --primary:#2F7DF6;
      --primary-dark:#1D5EDB;
      --secondary:#14B8A6;
      --accent:#F59E0B;
      --bg:#F7FAFF;
      --bg-soft:#F8FBFD;
      --text:#0F172A;
      --muted:#64748B;
      --sub:#475569;
      --border:#E2E8F0;
      --radius:24px;
      --radius-lg:32px;
      --shadow:0 18px 50px rgba(15,23,42,0.08);
      --shadow-hover:0 26px 70px rgba(15,23,42,0.13);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
      color:var(--text);
      background:linear-gradient(180deg,#F7FAFF 0%,#FFFFFF 48%,#F8FBFD 100%);
      line-height:1.75;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    ::selection{background:rgba(47,125,246,.16);color:#0F172A}
    .site-container{width:min(1280px,100%);margin-inline:auto;padding-inline:40px}
    .glass-nav{
      position:fixed;
      top:16px;
      left:50%;
      transform:translateX(-50%);
      z-index:50;
      width:min(1280px,calc(100% - 32px));
      border:1px solid rgba(255,255,255,.7);
      background:rgba(255,255,255,.72);
      backdrop-filter:blur(18px);
      -webkit-backdrop-filter:blur(18px);
      border-radius:999px;
      box-shadow:0 14px 45px rgba(15,23,42,.08);
      transition:all .3s ease;
    }
    .glass-nav.is-scrolled{
      top:0;
      width:100%;
      max-width:100%;
      border-radius:0;
      border-color:rgba(226,232,240,.86);
      background:rgba(255,255,255,.95);
      box-shadow:0 14px 40px rgba(15,23,42,.1);
    }
    .nav-link{
      position:relative;
      color:#334155;
      font-weight:650;
      font-size:15px;
      padding:10px 14px;
      border-radius:999px;
      transition:all .25s ease;
    }
    .nav-link:hover,.nav-link.active{
      color:var(--primary);
      background:rgba(47,125,246,.08);
    }
    .nav-cta,.btn-primary{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:46px;
      padding:12px 22px;
      border-radius:999px;
      color:#fff;
      font-weight:750;
      background:linear-gradient(135deg,var(--primary),var(--secondary));
      box-shadow:0 16px 34px rgba(47,125,246,.24);
      transition:transform .25s ease,box-shadow .25s ease,filter .25s ease;
    }
    .nav-cta:hover,.btn-primary:hover{
      transform:translateY(-2px);
      box-shadow:0 22px 44px rgba(47,125,246,.32);
      filter:saturate(1.08);
    }
    .btn-secondary{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:46px;
      padding:12px 22px;
      border-radius:999px;
      color:var(--primary);
      font-weight:750;
      background:rgba(255,255,255,.86);
      border:1px solid rgba(47,125,246,.22);
      box-shadow:0 10px 28px rgba(15,23,42,.06);
      transition:all .25s ease;
    }
    .btn-secondary:hover{
      transform:translateY(-2px);
      background:#EFF6FF;
      border-color:rgba(47,125,246,.42);
    }
    .btn-primary:focus-visible,.btn-secondary:focus-visible,.nav-link:focus-visible,.nav-cta:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
      outline:none;
      box-shadow:0 0 0 4px rgba(47,125,246,.22),0 18px 40px rgba(47,125,246,.18);
    }
    .section{padding-block:96px}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:rgba(47,125,246,.09);
      color:#1D5EDB;
      border:1px solid rgba(47,125,246,.16);
      font-size:13px;
      font-weight:760;
      letter-spacing:.02em;
    }
    .card{
      border:1px solid rgba(226,232,240,.78);
      background:rgba(255,255,255,.88);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
      transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
    }
    .card:hover{
      transform:translateY(-4px);
      box-shadow:var(--shadow-hover);
      border-color:rgba(20,184,166,.35);
    }
    .soft-grid{
      background-image:
        linear-gradient(rgba(47,125,246,.06) 1px,transparent 1px),
        linear-gradient(90deg,rgba(47,125,246,.06) 1px,transparent 1px);
      background-size:34px 34px;
    }
    .hero-bg{
      position:absolute;
      inset:0;
      background-image:
        linear-gradient(105deg,rgba(247,250,255,.96) 0%,rgba(247,250,255,.9) 36%,rgba(239,246,255,.78) 66%,rgba(255,255,255,.94) 100%),
        url('/assets/images/backpic/back-1.webp');
      background-size:cover;
      background-position:center;
    }
    .metric-bar span{
      display:block;
      height:8px;
      border-radius:999px;
      background:linear-gradient(90deg,var(--primary),var(--secondary));
    }
    .timeline-line:before{
      content:"";
      position:absolute;
      left:27px;
      top:28px;
      bottom:28px;
      width:2px;
      background:linear-gradient(180deg,rgba(47,125,246,.35),rgba(20,184,166,.18));
    }
    .image-mask:after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg,rgba(15,23,42,.04),rgba(15,23,42,.22));
      border-radius:inherit;
      pointer-events:none;
    }
    .faq-item{
      border:1px solid rgba(226,232,240,.8);
      border-radius:22px;
      background:#fff;
      box-shadow:0 12px 34px rgba(15,23,42,.055);
      overflow:hidden;
    }
    .faq-btn{
      width:100%;
      min-height:62px;
      padding:18px 22px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      color:#0F172A;
      font-weight:750;
      text-align:left;
      transition:background .25s ease;
    }
    .faq-btn:hover{background:#F8FBFF}
    .faq-panel{
      display:none;
      padding:0 22px 20px;
      color:#475569;
      font-size:15.5px;
    }
    .faq-item.open .faq-panel{display:block}
    .faq-item.open .faq-icon{transform:rotate(45deg);background:rgba(47,125,246,.1);color:var(--primary)}
    .faq-icon{
      flex:0 0 auto;
      width:30px;height:30px;
      border-radius:999px;
      display:grid;place-items:center;
      color:#64748B;
      transition:all .25s ease;
    }
    .footer-link{
      color:#CBD5E1;
      transition:color .22s ease,transform .22s ease;
      display:inline-flex;
    }
    .footer-link:hover{color:#fff;transform:translateX(3px)}
    .mobile-panel{
      display:none;
      border-top:1px solid rgba(226,232,240,.8);
      padding:12px 16px 18px;
    }
    .mobile-panel.open{display:block}
    @media (max-width:1024px){
      .site-container{padding-inline:32px}
      .section{padding-block:78px}
      .desktop-nav{display:none}
      .mobile-toggle{display:inline-flex}
      .glass-nav{border-radius:28px}
      .glass-nav.is-scrolled{border-radius:0}
    }
    @media (min-width:1025px){
      .mobile-toggle{display:none}
    }
    @media (max-width:768px){
      .site-container{padding-inline:22px}
      .section{padding-block:64px}
      .glass-nav{top:10px;width:calc(100% - 22px)}
      .hero-title{font-size:38px!important;line-height:1.16!important}
      .hero-lead{font-size:16.5px!important}
      .timeline-line:before{left:23px}
    }
    @media (max-width:520px){
      .site-container{padding-inline:18px}
      .hero-title{font-size:34px!important}
      .btn-primary,.btn-secondary{width:100%;padding-inline:18px}
      .cta-actions{width:100%;flex-direction:column}
      .glass-nav{width:calc(100% - 16px)}
    }

/* roulang page: category1 */
:root{
      --brand-blue:#2F7DF6;
      --brand-cyan:#14B8A6;
      --brand-amber:#F59E0B;
      --bg:#F7FAFF;
      --bg-soft:#F8FBFD;
      --text:#0F172A;
      --muted:#475569;
      --weak:#64748B;
      --border:#E2E8F0;
      --card:#FFFFFF;
      --radius-lg:28px;
      --radius-md:20px;
      --shadow:0 18px 50px rgba(15,23,42,.08);
      --shadow-hover:0 24px 70px rgba(15,23,42,.13);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 8% 12%, rgba(47,125,246,.12), transparent 32%),
        radial-gradient(circle at 92% 18%, rgba(20,184,166,.10), transparent 30%),
        linear-gradient(180deg,#F7FAFF 0%,#FFFFFF 38%,#F8FBFD 100%);
      line-height:1.75;
      overflow-x:hidden;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(47,125,246,.18);color:#0F172A}
    .page-shell{min-height:100vh}
    .section{padding:88px 0}
    .section-sm{padding:68px 0}
    .glass-nav{
      position:fixed;
      z-index:50;
      top:16px;
      left:50%;
      transform:translateX(-50%);
      width:min(calc(100% - 32px),1280px);
      border:1px solid rgba(255,255,255,.68);
      border-radius:999px;
      background:rgba(255,255,255,.72);
      backdrop-filter:blur(18px);
      -webkit-backdrop-filter:blur(18px);
      box-shadow:0 14px 46px rgba(15,23,42,.10);
      transition:top .28s ease,border-radius .28s ease,background .28s ease,box-shadow .28s ease,width .28s ease;
    }
    .glass-nav.is-scrolled{
      top:0;
      width:100%;
      border-radius:0;
      border-left:0;
      border-right:0;
      background:rgba(255,255,255,.95);
      box-shadow:0 10px 38px rgba(15,23,42,.09);
    }
    .nav-link{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:42px;
      padding:0 16px;
      border-radius:999px;
      color:#475569;
      font-size:14px;
      font-weight:700;
      transition:all .25s ease;
      outline:none;
    }
    .nav-link:hover{background:#EFF6FF;color:var(--brand-blue)}
    .nav-link.active{
      background:linear-gradient(135deg,rgba(47,125,246,.12),rgba(20,184,166,.10));
      color:#1D4ED8;
      box-shadow:inset 0 0 0 1px rgba(47,125,246,.16);
    }
    .nav-cta{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:44px;
      padding:0 20px;
      border-radius:999px;
      background:linear-gradient(135deg,var(--brand-blue),var(--brand-cyan));
      color:#fff;
      font-size:14px;
      font-weight:800;
      box-shadow:0 14px 34px rgba(47,125,246,.25);
      transition:transform .25s ease,box-shadow .25s ease,filter .25s ease;
    }
    .nav-cta:hover{transform:translateY(-2px);box-shadow:0 18px 46px rgba(47,125,246,.32);filter:saturate(1.05)}
    .nav-cta:focus-visible,.nav-link:focus-visible,.btn:focus-visible,.card-link:focus-visible,.mobile-toggle:focus-visible{
      outline:0;
      box-shadow:0 0 0 4px rgba(47,125,246,.18),0 0 0 1px rgba(47,125,246,.45);
    }
    .mobile-toggle{display:none;transition:all .25s ease}
    .mobile-toggle:hover{background:#EFF6FF;color:var(--brand-blue)}
    .mobile-panel{
      display:none;
      padding:0 16px 18px;
      border-top:1px solid rgba(226,232,240,.72);
    }
    .hero-banner{
      position:relative;
      padding:154px 0 82px;
      overflow:hidden;
      background:
        linear-gradient(115deg,rgba(247,250,255,.96) 0%,rgba(255,255,255,.86) 48%,rgba(239,246,255,.88) 100%),
        url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    }
    .hero-banner:before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 12% 26%,rgba(47,125,246,.16),transparent 28%),
        radial-gradient(circle at 86% 18%,rgba(20,184,166,.14),transparent 28%),
        linear-gradient(180deg,rgba(255,255,255,.12),rgba(255,255,255,.78));
      pointer-events:none;
    }
    .hero-banner:after{
      content:"";
      position:absolute;
      left:0;right:0;bottom:-1px;height:92px;
      background:linear-gradient(180deg,rgba(255,255,255,0),#fff);
      pointer-events:none;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:8px;
      border:1px solid rgba(47,125,246,.18);
      background:rgba(255,255,255,.78);
      color:#1D4ED8;
      border-radius:999px;
      padding:8px 13px;
      font-size:13px;
      font-weight:800;
      box-shadow:0 8px 26px rgba(47,125,246,.08);
    }
    .tag{
      display:inline-flex;
      align-items:center;
      border-radius:999px;
      padding:6px 11px;
      background:#ECFEFF;
      color:#0F766E;
      font-size:12px;
      font-weight:800;
      letter-spacing:.02em;
    }
    .tag-blue{background:#EFF6FF;color:#1D4ED8}
    .tag-amber{background:#FFFBEB;color:#B45309}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:50px;
      padding:0 24px;
      border-radius:999px;
      font-weight:800;
      transition:all .28s ease;
      border:1px solid transparent;
      white-space:nowrap;
    }
    .btn-primary{
      background:linear-gradient(135deg,var(--brand-blue),var(--brand-cyan));
      color:#fff;
      box-shadow:0 18px 42px rgba(47,125,246,.24);
    }
    .btn-primary:hover{transform:translateY(-3px);box-shadow:0 24px 58px rgba(47,125,246,.32)}
    .btn-secondary{
      background:rgba(255,255,255,.80);
      color:#1D4ED8;
      border-color:rgba(147,197,253,.7);
    }
    .btn-secondary:hover{background:#EFF6FF;transform:translateY(-2px);border-color:#93C5FD}
    .arrow{display:inline-block;transition:transform .25s ease}
    .btn:hover .arrow,.card-link:hover .arrow{transform:translateX(4px)}
    .soft-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(226,232,240,.78);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow);
      transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
    }
    .soft-card:hover{
      transform:translateY(-4px);
      box-shadow:var(--shadow-hover);
      border-color:rgba(147,197,253,.82);
    }
    .content-card{
      background:#fff;
      border:1px solid rgba(226,232,240,.9);
      border-radius:24px;
      box-shadow:0 14px 38px rgba(15,23,42,.06);
      transition:all .28s ease;
      overflow:hidden;
    }
    .content-card:hover{
      transform:translateY(-4px);
      border-color:rgba(20,184,166,.45);
      box-shadow:0 22px 54px rgba(15,23,42,.10);
    }
    .image-frame{
      position:relative;
      overflow:hidden;
      border-radius:24px;
      background:linear-gradient(135deg,#EFF6FF,#F0FDFA);
    }
    .image-frame img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
    .image-frame:hover img,.content-card:hover img{transform:scale(1.04)}
    .image-frame:after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg,rgba(15,23,42,0),rgba(15,23,42,.22));
      pointer-events:none;
    }
    .index-card{
      position:sticky;
      top:108px;
      background:linear-gradient(180deg,#FFFFFF,#F8FBFF);
      border:1px solid rgba(226,232,240,.86);
      border-radius:28px;
      padding:22px;
      box-shadow:var(--shadow);
    }
    .index-link{
      display:flex;
      align-items:flex-start;
      gap:12px;
      padding:13px 12px;
      border-radius:18px;
      color:#475569;
      font-weight:750;
      transition:all .25s ease;
    }
    .index-link:hover{background:#EFF6FF;color:#1D4ED8}
    .index-dot{
      margin-top:8px;
      width:8px;
      height:8px;
      border-radius:999px;
      background:linear-gradient(135deg,var(--brand-blue),var(--brand-cyan));
      flex:0 0 auto;
    }
    .path-step{
      position:relative;
      padding:22px;
      border-radius:24px;
      background:#fff;
      border:1px solid rgba(226,232,240,.86);
      box-shadow:0 14px 36px rgba(15,23,42,.06);
    }
    .path-step:before{
      content:"";
      position:absolute;
      left:24px;
      top:-1px;
      width:58px;
      height:4px;
      border-radius:999px;
      background:linear-gradient(90deg,var(--brand-blue),var(--brand-cyan));
    }
    .compare-panel{
      border-radius:32px;
      border:1px solid rgba(226,232,240,.82);
      background:
        linear-gradient(135deg,rgba(239,246,255,.86),rgba(240,253,250,.74)),
        #fff;
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .faq-item{
      border:1px solid rgba(226,232,240,.86);
      background:#fff;
      border-radius:22px;
      padding:24px;
      box-shadow:0 12px 32px rgba(15,23,42,.05);
    }
    .faq-item h3{font-weight:850;color:#0F172A}
    .cta-wrap{
      position:relative;
      overflow:hidden;
      border-radius:36px;
      background:
        radial-gradient(circle at 10% 20%,rgba(255,255,255,.32),transparent 24%),
        linear-gradient(135deg,#2F7DF6,#14B8A6);
      color:#fff;
      box-shadow:0 28px 80px rgba(47,125,246,.28);
    }
    .cta-wrap:after{
      content:"";
      position:absolute;
      right:-90px;
      top:-90px;
      width:260px;
      height:260px;
      border-radius:50%;
      background:rgba(255,255,255,.14);
    }
    .site-footer{
      background:#0F172A;
      color:#CBD5E1;
      padding:66px 0 28px;
      margin-top:88px;
    }
    .site-footer a{color:#CBD5E1;transition:color .25s ease}
    .site-footer a:hover{color:#fff}
    .footer-title{color:#fff;font-weight:850;margin-bottom:14px}
    .footer-line{border-top:1px solid rgba(148,163,184,.18);margin-top:38px;padding-top:22px;color:#94A3B8}
    .clamp-2{
      display:-webkit-box;
      -webkit-line-clamp:2;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }
    .clamp-3{
      display:-webkit-box;
      -webkit-line-clamp:3;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }
    @media (max-width:1024px){
      .section{padding:72px 0}
      .hero-banner{padding:140px 0 70px}
      .desktop-nav{display:none!important}
      .mobile-toggle{display:grid}
      .glass-nav{border-radius:28px}
      .glass-nav.menu-open{border-radius:28px;background:rgba(255,255,255,.96)}
      .mobile-panel.open{display:block}
      .index-card{position:relative;top:auto}
    }
    @media (max-width:768px){
      .section{padding:58px 0}
      .section-sm{padding:50px 0}
      .hero-banner{padding:128px 0 58px}
      .btn{width:100%;min-height:52px}
      .glass-nav{width:calc(100% - 20px);top:10px}
      .glass-nav.is-scrolled{width:100%;top:0;border-radius:0}
      .soft-card,.compare-panel,.cta-wrap{border-radius:26px}
    }
    @media (max-width:520px){
      .nav-link{justify-content:flex-start}
      .hero-banner h1{font-size:35px!important;line-height:1.16!important}
      .section{padding:50px 0}
      .badge{font-size:12px}
    }