/* roulang page: index */
:root{
      --bg: #f4f8ff;
      --bg-soft: #eef4ff;
      --surface: rgba(255,255,255,.88);
      --surface-strong: #ffffff;
      --surface-dark: #0f1d3a;
      --line: rgba(124, 156, 214, .22);
      --line-strong: rgba(86, 125, 196, .32);
      --text: #10203d;
      --muted: #5f728f;
      --primary: #2c6bed;
      --primary-2: #0fb1c8;
      --accent: #7d59ff;
      --success: #0fa36b;
      --warning: #f0a43b;
      --shadow: 0 18px 45px rgba(21, 54, 110, .10);
      --shadow-strong: 0 24px 65px rgba(24, 53, 111, .16);
      --radius-xl: 28px;
      --radius-lg: 22px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --container: 1200px;
      --transition: .28s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:"Inter","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(44,107,237,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(15,177,200,.10), transparent 24%),
        linear-gradient(180deg, #f7fbff 0%, #f2f7ff 100%);
      line-height:1.75;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:color var(--transition),opacity var(--transition),transform var(--transition)}
    a:hover{color:var(--primary)}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    ::selection{background:rgba(44,107,237,.16);color:var(--text)}
    .container-xxl{
      max-width:var(--container);
    }
    .site-header{
      position:sticky;
      top:0;
      z-index:1030;
      background:rgba(247,250,255,.78);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(180,200,235,.35);
      box-shadow:0 8px 28px rgba(29,61,120,.04);
    }
    .navbar{
      padding:.95rem 0;
    }
    .navbar-brand{
      display:flex;
      align-items:center;
      gap:.75rem;
      font-weight:800;
      color:var(--text);
      letter-spacing:.2px;
    }
    .brand-mark{
      width:42px;
      height:42px;
      border-radius:14px;
      display:grid;
      place-items:center;
      color:#fff;
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      box-shadow:0 12px 28px rgba(44,107,237,.26);
      flex:0 0 auto;
    }
    .brand-text{
      font-size:1.02rem;
      line-height:1.1;
    }
    .brand-text small{
      display:block;
      font-size:.72rem;
      color:var(--muted);
      font-weight:600;
      margin-top:.14rem;
      letter-spacing:.3px;
    }
    .navbar .nav-link{
      color:#39506f;
      font-weight:600;
      padding:.72rem 1rem;
      border-radius:999px;
      transition:background var(--transition), color var(--transition), transform var(--transition);
    }
    .navbar .nav-link:hover,
    .navbar .nav-link:focus{
      color:var(--primary);
      background:rgba(44,107,237,.08);
    }
    .navbar .nav-link.active{
      color:var(--primary);
      background:rgba(44,107,237,.12);
      box-shadow:inset 0 0 0 1px rgba(44,107,237,.14);
    }
    .header-note{
      display:flex;
      align-items:center;
      gap:.5rem;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .header-chip{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.45rem .8rem;
      border-radius:999px;
      background:rgba(255,255,255,.84);
      border:1px solid rgba(169,194,234,.52);
      color:#476184;
      font-size:.86rem;
      box-shadow:0 10px 24px rgba(19,48,97,.05);
      white-space:nowrap;
    }
    .header-chip i{color:var(--primary)}
    .hero{
      padding:4.75rem 0 2.5rem;
      position:relative;
    }
    .hero::before,
    .hero::after{
      content:"";
      position:absolute;
      border-radius:50%;
      pointer-events:none;
      filter:blur(2px);
    }
    .hero::before{
      width:260px;height:260px;
      background:rgba(44,107,237,.08);
      left:-80px;top:20px;
    }
    .hero::after{
      width:320px;height:320px;
      background:rgba(15,177,200,.08);
      right:-110px;top:180px;
    }
    .hero-copy{
      padding:1rem 0;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.45rem .85rem;
      border-radius:999px;
      background:rgba(44,107,237,.10);
      color:var(--primary);
      font-weight:700;
      font-size:.84rem;
      letter-spacing:.2px;
      margin-bottom:1rem;
      border:1px solid rgba(44,107,237,.12);
    }
    .hero h1{
      font-size:clamp(2rem, 4vw, 3.85rem);
      line-height:1.12;
      letter-spacing:-.04em;
      font-weight:800;
      margin-bottom:1rem;
    }
    .hero-lead{
      font-size:1.03rem;
      color:var(--muted);
      max-width:40rem;
      margin-bottom:1.4rem;
    }
    .hero-actions{
      display:flex;
      gap:.8rem;
      flex-wrap:wrap;
      margin-bottom:1.4rem;
    }
    .btn-cta,
    .btn-ghost,
    .btn-outline-soft{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.5rem;
      border-radius:999px;
      font-weight:700;
      padding:.86rem 1.2rem;
      border:1px solid transparent;
      transition:transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
      text-decoration:none;
    }
    .btn-cta{
      color:#fff;
      background:linear-gradient(135deg, var(--primary), #4f86ff);
      box-shadow:0 16px 30px rgba(44,107,237,.22);
    }
    .btn-cta:hover{color:#fff; transform:translateY(-2px); box-shadow:0 20px 35px rgba(44,107,237,.27)}
    .btn-ghost{
      color:var(--primary);
      background:rgba(255,255,255,.78);
      border-color:rgba(44,107,237,.16);
      box-shadow:0 14px 28px rgba(18,43,92,.06);
    }
    .btn-ghost:hover{
      color:var(--primary);
      background:#fff;
      transform:translateY(-2px);
    }
    .btn-outline-soft{
      color:#35506f;
      background:rgba(255,255,255,.78);
      border-color:rgba(140,165,209,.42);
    }
    .btn-outline-soft:hover{
      color:var(--primary);
      transform:translateY(-2px);
      border-color:rgba(44,107,237,.28);
      background:#fff;
    }
    .hero-points{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:.85rem;
      margin-top:1.35rem;
    }
    .point-card{
      background:rgba(255,255,255,.85);
      border:1px solid rgba(174,197,232,.5);
      border-radius:18px;
      padding:1rem;
      box-shadow:var(--shadow);
    }
    .point-card strong{
      display:block;
      font-size:1.15rem;
      margin-bottom:.15rem;
      color:var(--text);
    }
    .point-card span{
      color:var(--muted);
      font-size:.92rem;
    }
    .hero-stage-wrap{
      padding:0 1rem;
    }
    .hero-stage{
      position:relative;
      padding:1rem;
      border-radius:var(--radius-xl);
      background:linear-gradient(180deg, rgba(255,255,255,.92), rgba(245,249,255,.92));
      border:1px solid rgba(169,193,232,.56);
      box-shadow:var(--shadow-strong);
      overflow:hidden;
    }
    .hero-stage::before{
      content:"";
      position:absolute;
      inset:auto -30px -30px auto;
      width:180px;
      height:180px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(15,177,200,.16), transparent 66%);
    }
    .screen-frame{
      background:#fff;
      border-radius:22px;
      border:1px solid rgba(172,194,230,.56);
      box-shadow:0 18px 40px rgba(26,53,104,.10);
      overflow:hidden;
      position:relative;
    }
    .screen-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:.95rem 1.05rem;
      border-bottom:1px solid rgba(184,205,235,.56);
      background:linear-gradient(180deg, #f7fbff, #eef5ff);
    }
    .screen-dots{
      display:flex;
      gap:.4rem;
    }
    .screen-dots i{
      width:10px;height:10px;border-radius:50%;
      display:block;
    }
    .screen-dots i:nth-child(1){background:#ff6b6b}
    .screen-dots i:nth-child(2){background:#f8c64d}
    .screen-dots i:nth-child(3){background:#35c07d}
    .screen-title{
      font-size:.95rem;
      font-weight:700;
      color:#35506f;
    }
    .hero-carousel .carousel-indicators{
      margin-bottom:.6rem;
    }
    .hero-carousel .carousel-indicators [data-bs-target]{
      width:9px;height:9px;border-radius:50%;
      background:rgba(44,107,237,.28);
      border:0;
      opacity:1;
    }
    .hero-carousel .carousel-indicators .active{
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      width:22px;
      border-radius:999px;
    }
    .hero-slide{
      padding:1.2rem;
      min-height:350px;
      display:grid;
      grid-template-rows:auto 1fr auto;
      gap:1rem;
      background:
        radial-gradient(circle at top right, rgba(44,107,237,.10), transparent 35%),
        linear-gradient(180deg, #fff, #f7fbff);
    }
    .hero-kicker{
      display:flex;
      gap:.5rem;
      flex-wrap:wrap;
    }
    .mini-tag{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.35rem .65rem;
      border-radius:999px;
      background:rgba(44,107,237,.08);
      color:var(--primary);
      font-size:.8rem;
      font-weight:700;
    }
    .mock-grid{
      display:grid;
      grid-template-columns:1.15fr .85fr;
      gap:.85rem;
      align-items:stretch;
    }
    .mock-card{
      border-radius:18px;
      border:1px solid rgba(173,194,231,.6);
      background:#fff;
      padding:1rem;
      box-shadow:0 12px 26px rgba(26,53,104,.08);
      min-height:130px;
    }
    .mock-card.dark{
      background:linear-gradient(180deg, #11244d, #0d1835);
      color:#fff;
      border-color:rgba(255,255,255,.08);
    }
    .mock-card h3,.mock-card h4{
      font-size:1rem;
      margin-bottom:.35rem;
      font-weight:800;
    }
    .mock-card p{
      font-size:.88rem;
      color:inherit;
      opacity:.82;
      margin-bottom:0;
    }
    .mock-bars{
      display:grid;
      gap:.55rem;
      margin-top:.8rem;
    }
    .mock-bar{
      height:10px;
      border-radius:999px;
      background:#e8f0ff;
      overflow:hidden;
    }
    .mock-bar span{
      display:block;
      height:100%;
      border-radius:inherit;
      background:linear-gradient(90deg, var(--primary), var(--primary-2));
    }
    .mock-chip-row{
      display:flex;
      gap:.5rem;
      flex-wrap:wrap;
      margin-top:.75rem;
    }
    .screen-footer{
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:.75rem;
      color:var(--muted);
      font-size:.88rem;
      padding:0 .2rem .15rem;
    }
    .side-actions{
      display:grid;
      gap:.8rem;
    }
    .side-panel{
      background:rgba(255,255,255,.9);
      border:1px solid rgba(173,194,231,.56);
      border-radius:var(--radius-lg);
      padding:1.15rem;
      box-shadow:var(--shadow);
    }
    .side-panel h2{
      font-size:1rem;
      margin-bottom:.65rem;
      font-weight:800;
    }
    .side-panel p{
      color:var(--muted);
      margin-bottom:0;
      font-size:.94rem;
    }
    .button-stack{
      display:grid;
      gap:.7rem;
    }
    .badge-row{
      display:flex;
      flex-wrap:wrap;
      gap:.5rem;
      margin-top:1rem;
    }
    .pill-badge{
      display:inline-flex;
      align-items:center;
      gap:.4rem;
      padding:.42rem .7rem;
      border-radius:999px;
      background:rgba(16,35,72,.05);
      color:#4d647f;
      font-size:.8rem;
      font-weight:700;
      border:1px solid rgba(167,187,222,.48);
    }
    .pill-badge i{color:var(--primary)}
    .section{
      padding:3.3rem 0;
      position:relative;
    }
    .section-head{
      margin-bottom:1.35rem;
    }
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:.4rem;
      font-weight:800;
      font-size:.82rem;
      color:var(--primary);
      background:rgba(44,107,237,.08);
      border:1px solid rgba(44,107,237,.12);
      border-radius:999px;
      padding:.42rem .8rem;
      margin-bottom:.8rem;
    }
    .section-title{
      font-size:clamp(1.45rem, 2.3vw, 2.15rem);
      font-weight:800;
      letter-spacing:-.03em;
      margin:0 0 .55rem;
    }
    .section-desc{
      max-width:820px;
      color:var(--muted);
      margin:0;
      font-size:1rem;
    }
    .surface-card{
      background:var(--surface);
      border:1px solid rgba(173,194,231,.54);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow);
    }
    .directory-grid{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:1rem;
    }
    .directory-card{
      padding:1.15rem;
      height:100%;
      transition:transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }
    .directory-card:hover{
      transform:translateY(-4px);
      box-shadow:var(--shadow-strong);
      border-color:rgba(44,107,237,.22);
    }
    .icon-bubble{
      width:50px;
      height:50px;
      border-radius:16px;
      display:grid;
      place-items:center;
      font-size:1.2rem;
      color:#fff;
      margin-bottom:.95rem;
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      box-shadow:0 12px 24px rgba(44,107,237,.18);
    }
    .directory-card h3{
      font-size:1.02rem;
      font-weight:800;
      margin-bottom:.45rem;
    }
    .directory-card p{
      color:var(--muted);
      font-size:.93rem;
      margin-bottom:.75rem;
    }
    .mini-list{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:.45rem;
      color:#415873;
      font-size:.9rem;
    }
    .mini-list li{
      display:flex;
      gap:.5rem;
      align-items:flex-start;
    }
    .mini-list li i{
      color:var(--success);
      margin-top:.22rem;
      flex:0 0 auto;
    }
    .value-grid{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:1rem;
    }
    .value-card{
      padding:1.25rem;
      position:relative;
      overflow:hidden;
    }
    .value-card::before{
      content:"";
      position:absolute;
      inset:auto -38px -38px auto;
      width:120px;
      height:120px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(44,107,237,.10), transparent 62%);
    }
    .value-card .value-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      margin-bottom:.85rem;
    }
    .value-card .value-top span{
      font-size:.82rem;
      color:var(--primary);
      font-weight:800;
      background:rgba(44,107,237,.08);
      border-radius:999px;
      padding:.32rem .6rem;
      border:1px solid rgba(44,107,237,.12);
    }
    .value-card h3{
      font-size:1.05rem;
      font-weight:800;
      margin-bottom:.45rem;
    }
    .value-card p{
      margin-bottom:0;
      color:var(--muted);
      font-size:.93rem;
    }
    .trust-strip{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:1rem;
    }
    .trust-item{
      display:flex;
      gap:.9rem;
      align-items:flex-start;
      padding:1rem 1.05rem;
      border-radius:18px;
      background:#fff;
      border:1px solid rgba(173,194,231,.54);
      box-shadow:0 12px 26px rgba(26,53,104,.06);
    }
    .trust-icon{
      width:44px;
      height:44px;
      border-radius:14px;
      display:grid;
      place-items:center;
      color:#fff;
      flex:0 0 auto;
      background:linear-gradient(135deg, var(--primary), var(--accent));
    }
    .trust-item h4{
      font-size:.98rem;
      margin:0 0 .25rem;
      font-weight:800;
    }
    .trust-item p{
      margin:0;
      color:var(--muted);
      font-size:.9rem;
      line-height:1.6;
    }
    .news-layout{
      display:grid;
      grid-template-columns:1.35fr .85fr;
      gap:1rem;
    }
    .news-list{
      padding:1.1rem;
    }
    .news-row{
      display:flex;
      gap:1rem;
      justify-content:space-between;
      align-items:flex-start;
      padding:1rem 0;
      border-bottom:1px solid rgba(179,199,230,.45);
    }
    .news-row:first-child{padding-top:0}
    .news-row:last-child{
      border-bottom:0;
      padding-bottom:0;
    }
    .news-row a{
      font-weight:800;
      display:inline-flex;
      gap:.35rem;
      align-items:center;
      color:var(--text);
    }
    .news-row a:hover{color:var(--primary)}
    .news-row p{
      margin:.35rem 0 0;
      color:var(--muted);
      font-size:.93rem;
      line-height:1.68;
    }
    .news-meta{
      flex:0 0 auto;
      color:#7b8da9;
      font-size:.84rem;
      margin-top:.1rem;
      white-space:nowrap;
    }
    .news-side{
      padding:1.1rem;
      display:grid;
      gap:1rem;
    }
    .side-list{
      display:grid;
      gap:.75rem;
      margin:0;
      padding:0;
      list-style:none;
    }
    .side-list li{
      display:flex;
      gap:.75rem;
      align-items:flex-start;
      padding:.85rem .9rem;
      border-radius:16px;
      background:#fff;
      border:1px solid rgba(173,194,231,.5);
    }
    .side-list .num{
      width:28px;height:28px;border-radius:10px;
      display:grid;place-items:center;
      color:#fff;
      font-size:.84rem;
      font-weight:800;
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      flex:0 0 auto;
    }
    .side-list strong{
      display:block;
      font-size:.93rem;
      margin-bottom:.16rem;
    }
    .side-list span{
      color:var(--muted);
      font-size:.88rem;
      line-height:1.56;
    }
    .demo-grid{
      display:grid;
      grid-template-columns:.95fr 1.05fr;
      gap:1rem;
      align-items:stretch;
    }
    .demo-panel{
      padding:1.15rem;
      height:100%;
    }
    .step-list{
      display:grid;
      gap:.85rem;
      margin:0;
      padding:0;
      list-style:none;
    }
    .step-item{
      display:flex;
      gap:.9rem;
      align-items:flex-start;
      padding:1rem;
      border-radius:18px;
      border:1px solid rgba(173,194,231,.48);
      background:rgba(255,255,255,.88);
    }
    .step-index{
      width:38px;height:38px;border-radius:14px;
      display:grid;place-items:center;
      background:linear-gradient(135deg, var(--primary), var(--accent));
      color:#fff;font-weight:800;
      flex:0 0 auto;
      box-shadow:0 12px 22px rgba(44,107,237,.18);
    }
    .step-item h4{
      margin:0 0 .2rem;
      font-size:.98rem;
      font-weight:800;
    }
    .step-item p{
      margin:0;
      color:var(--muted);
      font-size:.92rem;
      line-height:1.65;
    }
    .progress-group{
      display:grid;
      gap:.9rem;
    }
    .progress-card{
      padding:1rem;
      border-radius:18px;
      background:#fff;
      border:1px solid rgba(173,194,231,.5);
      box-shadow:0 12px 26px rgba(26,53,104,.06);
    }
    .progress-card .head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      margin-bottom:.65rem;
      font-weight:800;
    }
    .progress{
      height:12px;
      border-radius:999px;
      background:#e8effb;
      overflow:hidden;
      margin-bottom:.5rem;
    }
    .progress-bar{
      background:linear-gradient(90deg, var(--primary), var(--primary-2));
      border-radius:inherit;
    }
    .progress-card small{
      color:var(--muted);
      font-size:.88rem;
    }
    .qa-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:1rem;
    }
    .faq-wrap{
      padding:1.05rem;
    }
    .accordion-item{
      border:1px solid rgba(173,194,231,.52);
      border-radius:18px !important;
      overflow:hidden;
      background:#fff;
      box-shadow:0 12px 26px rgba(26,53,104,.05);
      margin-bottom:.85rem;
    }
    .accordion-button{
      font-weight:800;
      color:var(--text);
      background:#fff;
      padding:1.05rem 1.1rem;
      box-shadow:none;
    }
    .accordion-button:not(.collapsed){
      color:var(--primary);
      background:linear-gradient(180deg, #f9fbff, #f2f7ff);
    }
    .accordion-button:focus{
      border-color:rgba(44,107,237,.18);
      box-shadow:0 0 0 .25rem rgba(44,107,237,.12);
    }
    .accordion-body{
      color:var(--muted);
      line-height:1.8;
      padding:0 1.1rem 1rem;
    }
    .download-band{
      padding:1.25rem;
      border-radius:var(--radius-xl);
      background:
        radial-gradient(circle at top right, rgba(44,107,237,.15), transparent 26%),
        radial-gradient(circle at bottom left, rgba(15,177,200,.14), transparent 24%),
        linear-gradient(180deg, #ffffff, #f6faff);
      border:1px solid rgba(173,194,231,.56);
      box-shadow:var(--shadow-strong);
    }
    .download-band h2{
      font-size:clamp(1.45rem, 2vw, 2rem);
      font-weight:800;
      margin-bottom:.6rem;
    }
    .download-band p{
      color:var(--muted);
      margin-bottom:1rem;
      max-width:760px;
    }
    .form-control,
    .form-select{
      border-radius:16px;
      border-color:rgba(174,196,230,.72);
      min-height:52px;
      box-shadow:none;
    }
    .form-control:focus,
    .form-select:focus{
      border-color:rgba(44,107,237,.38);
      box-shadow:0 0 0 .25rem rgba(44,107,237,.12);
    }
    .form-note{
      color:#6a7e98;
      font-size:.88rem;
      margin-top:.6rem;
    }
    .foot-actions{
      display:flex;
      gap:.75rem;
      flex-wrap:wrap;
      align-items:center;
      margin-top:1rem;
    }
    .site-footer{
      margin-top:2rem;
      padding:2rem 0 2.4rem;
      border-top:1px solid rgba(174,196,230,.45);
      color:#5d708d;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr;
      gap:1rem;
      align-items:flex-start;
    }
    .footer-brand{
      display:flex;
      align-items:center;
      gap:.75rem;
      margin-bottom:1rem;
    }
    .footer-brand .brand-mark{
      width:46px;height:46px;
    }
    .footer-links{
      display:flex;
      flex-wrap:wrap;
      gap:.8rem 1.1rem;
      justify-content:flex-end;
    }
    .footer-links a{
      color:#516986;
      font-weight:600;
    }
    .footer-links a:hover{color:var(--primary)}
    .footer-copy{
      margin-top:1rem;
      padding-top:1rem;
      border-top:1px solid rgba(174,196,230,.4);
      display:flex;
      gap:1rem;
      justify-content:space-between;
      flex-wrap:wrap;
      font-size:.88rem;
    }
    .small-muted{color:var(--muted)}
    .soft-divider{
      height:1px;
      background:linear-gradient(90deg, transparent, rgba(171,192,226,.8), transparent);
      margin:1rem 0;
    }
    .sticky-cta{
      position:fixed;
      left:0;
      right:0;
      bottom:0;
      z-index:1025;
      background:rgba(255,255,255,.88);
      backdrop-filter:blur(16px);
      border-top:1px solid rgba(174,196,230,.48);
      box-shadow:0 -14px 40px rgba(20,43,86,.08);
      padding:.8rem 0;
      display:none;
    }
    .sticky-cta .container-xxl{
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:.8rem;
      flex-wrap:wrap;
    }
    .sticky-cta strong{
      font-size:.95rem;
    }
    .sticky-cta span{
      color:var(--muted);
      font-size:.86rem;
    }
    @media (max-width: 1199.98px){
      .directory-grid,
      .value-grid,
      .trust-strip{
        grid-template-columns:repeat(2,minmax(0,1fr));
      }
      .news-layout,
      .demo-grid,
      .qa-grid,
      .footer-grid{
        grid-template-columns:1fr;
      }
      .hero-points{
        grid-template-columns:1fr;
      }
      .mock-grid{
        grid-template-columns:1fr;
      }
    }
    @media (max-width: 991.98px){
      .header-note{
        justify-content:flex-start;
        margin-top:.75rem;
      }
      .navbar .nav-link{
        padding:.85rem 1rem;
      }
      .hero{
        padding-top:2.6rem;
      }
      .hero-stage-wrap{
        padding:0;
        margin-top:1rem;
      }
      .hero-copy{
        padding:0;
      }
    }
    @media (max-width: 767.98px){
      .section{
        padding:2.4rem 0;
      }
      .hero h1{
        font-size:clamp(1.9rem, 8vw, 2.8rem);
      }
      .hero-actions{
        flex-direction:column;
        align-items:stretch;
      }
      .btn-cta,
      .btn-ghost,
      .btn-outline-soft{
        width:100%;
      }
      .directory-grid,
      .value-grid,
      .trust-strip{
        grid-template-columns:1fr;
      }
      .news-row{
        flex-direction:column;
        gap:.4rem;
      }
      .news-meta{
        white-space:normal;
      }
      .sticky-cta{
        display:block;
      }
      body{
        padding-bottom:92px;
      }
    }
    @media (max-width: 575.98px){
      .hero-stage,
      .surface-card,
      .download-band{
        border-radius:22px;
      }
      .screen-frame{
        border-radius:18px;
      }
      .hero-slide{
        min-height:auto;
        padding:1rem;
      }
      .screen-title{
        font-size:.86rem;
      }
      .hero{
        padding-bottom:1.4rem;
      }
    }

/* roulang page: category1 */
:root{
      --primary:#1769ff;
      --primary-600:#0e55d7;
      --primary-50:#eef5ff;
      --accent:#18c7ff;
      --accent-2:#8b5cf6;
      --ink:#132238;
      --muted:#64748b;
      --soft:#f6f9ff;
      --surface:#ffffff;
      --panel:#0f1b33;
      --panel-2:#15284a;
      --border:#dbe6f5;
      --border-strong:#c7d7ee;
      --success:#16a34a;
      --warning:#f59e0b;
      --danger:#ef4444;
      --radius-sm:12px;
      --radius:20px;
      --radius-lg:28px;
      --shadow-sm:0 10px 24px rgba(15,35,70,.08);
      --shadow:0 20px 55px rgba(15,35,70,.12);
      --shadow-lg:0 30px 80px rgba(15,35,70,.18);
      --nav-h:78px;
      --ease:all .22s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at top left, rgba(23,105,255,.12), transparent 34rem),
        linear-gradient(180deg,#f8fbff 0%,#ffffff 36%,#f6f9ff 100%);
      line-height:1.75;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    img{max-width:100%;height:auto;display:block}
    button,input,select,textarea{font:inherit}
    ::selection{background:rgba(23,105,255,.18);color:var(--ink)}
    .container-xxl{max-width:1220px}
    .site-header{
      position:sticky;
      top:0;
      z-index:1040;
      background:rgba(255,255,255,.88);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(219,230,245,.8);
      box-shadow:0 8px 28px rgba(15,35,70,.04);
    }
    .navbar{min-height:var(--nav-h);padding:12px 0}
    .navbar-brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:0;
      padding:0;
      margin:0;
    }
    .brand-mark{
      width:46px;
      height:46px;
      border-radius:16px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      color:#fff;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      box-shadow:0 14px 28px rgba(23,105,255,.28);
      flex:0 0 auto;
    }
    .brand-text{
      display:flex;
      flex-direction:column;
      font-weight:900;
      letter-spacing:-.03em;
      color:var(--ink);
      line-height:1.12;
      font-size:1.05rem;
      white-space:normal;
    }
    .brand-text small{
      margin-top:4px;
      font-size:.72rem;
      font-weight:700;
      letter-spacing:0;
      color:var(--muted);
    }
    .navbar-nav{gap:8px}
    .nav-link{
      color:#334155;
      font-weight:800;
      border-radius:999px;
      padding:10px 16px!important;
      position:relative;
    }
    .nav-link:hover,.nav-link:focus{
      color:var(--primary);
      background:var(--primary-50);
      outline:none;
    }
    .nav-link.active{
      color:#fff!important;
      background:linear-gradient(135deg,var(--primary),var(--primary-600));
      box-shadow:0 12px 24px rgba(23,105,255,.18);
    }
    .navbar-toggler{
      width:46px;
      height:46px;
      border-radius:14px;
      background:var(--primary-50);
    }
    .navbar-toggler:focus{box-shadow:0 0 0 4px rgba(23,105,255,.14)!important}
    .header-note{
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
    }
    .header-chip{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:9px 12px;
      border:1px solid var(--border);
      border-radius:999px;
      color:#38506c;
      background:#fff;
      font-size:.84rem;
      font-weight:800;
      box-shadow:var(--shadow-sm);
    }
    .header-chip i{color:var(--primary)}
    .section{padding:84px 0}
    .section-tight{padding:64px 0}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      border:1px solid rgba(23,105,255,.18);
      background:rgba(238,245,255,.78);
      color:var(--primary-600);
      font-weight:900;
      padding:8px 14px;
      border-radius:999px;
      font-size:.88rem;
      margin-bottom:18px;
    }
    .hero{
      padding:58px 0 72px;
    }
    .hero-panel{
      background:
        radial-gradient(circle at 18% 12%, rgba(24,199,255,.22), transparent 24rem),
        radial-gradient(circle at 86% 8%, rgba(139,92,246,.22), transparent 22rem),
        linear-gradient(135deg,var(--panel),#0b1428 72%);
      color:#fff;
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-lg);
      overflow:hidden;
      position:relative;
      border:1px solid rgba(255,255,255,.12);
    }
    .hero-panel:before{
      content:"";
      position:absolute;
      inset:0;
      background-image:linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
      background-size:42px 42px;
      mask-image:linear-gradient(90deg,rgba(0,0,0,.7),transparent 88%);
      pointer-events:none;
    }
    .hero-copy{
      position:relative;
      padding:56px;
      z-index:1;
    }
    .hero h1{
      font-size:clamp(2.1rem,4vw,4.25rem);
      line-height:1.08;
      font-weight:950;
      letter-spacing:-.06em;
      margin:0 0 18px;
      max-width:740px;
    }
    .hero p{
      color:#c9d7ee;
      font-size:1.08rem;
      max-width:690px;
      margin:0 0 28px;
    }
    .hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:26px}
    .btn-brand,.btn-soft,.btn-outline-panel{
      border:0;
      border-radius:16px;
      padding:13px 20px;
      font-weight:900;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      transition:var(--ease);
      min-height:50px;
    }
    .btn-brand{
      color:#fff;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      box-shadow:0 16px 30px rgba(23,105,255,.28);
    }
    .btn-brand:hover,.btn-brand:focus{
      color:#fff;
      transform:translateY(-2px);
      box-shadow:0 22px 44px rgba(23,105,255,.36);
    }
    .btn-soft{
      color:var(--primary-600);
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow-sm);
    }
    .btn-soft:hover,.btn-soft:focus{
      color:var(--primary);
      transform:translateY(-2px);
      box-shadow:var(--shadow);
    }
    .btn-outline-panel{
      color:#eaf2ff;
      background:rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.18);
    }
    .btn-outline-panel:hover,.btn-outline-panel:focus{
      color:#fff;
      background:rgba(255,255,255,.14);
      transform:translateY(-2px);
    }
    .hero-meta{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
    }
    .hero-meta span{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:8px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.09);
      color:#dbeafe;
      font-weight:800;
      font-size:.9rem;
    }
    .hero-rank{
      position:relative;
      z-index:1;
      margin:28px 28px 28px 0;
      padding:22px;
      border-radius:24px;
      background:rgba(255,255,255,.1);
      border:1px solid rgba(255,255,255,.18);
      box-shadow:0 28px 70px rgba(0,0,0,.2);
      backdrop-filter:blur(16px);
    }
    .rank-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      padding-bottom:14px;
      margin-bottom:14px;
      border-bottom:1px solid rgba(255,255,255,.14);
    }
    .rank-title{font-weight:950;font-size:1.05rem}
    .live-dot{
      display:inline-flex;
      align-items:center;
      gap:7px;
      color:#c7f9d4;
      font-weight:900;
      font-size:.86rem;
    }
    .live-dot:before{
      content:"";
      width:8px;height:8px;border-radius:50%;
      background:#22c55e;
      box-shadow:0 0 0 8px rgba(34,197,94,.13);
    }
    .rank-item{
      display:grid;
      grid-template-columns:auto 1fr auto;
      align-items:center;
      gap:12px;
      padding:13px 0;
      border-bottom:1px solid rgba(255,255,255,.09);
    }
    .rank-item:last-child{border-bottom:0}
    .rank-no{
      width:34px;height:34px;
      display:flex;align-items:center;justify-content:center;
      border-radius:12px;
      background:rgba(255,255,255,.12);
      color:#fff;
      font-weight:950;
    }
    .rank-name{font-weight:900;color:#fff;line-height:1.25}
    .rank-desc{font-size:.82rem;color:#aebed6;margin-top:3px}
    .rank-status{
      padding:6px 10px;
      border-radius:999px;
      background:rgba(24,199,255,.14);
      color:#b9efff;
      font-size:.78rem;
      font-weight:900;
      white-space:nowrap;
    }
    .panel-card,.feature-card,.require-card,.review-card,.faq-card,.download-card{
      background:rgba(255,255,255,.92);
      border:1px solid var(--border);
      border-radius:var(--radius);
      box-shadow:var(--shadow-sm);
      transition:var(--ease);
    }
    .panel-card:hover,.feature-card:hover,.review-card:hover,.download-card:hover{
      transform:translateY(-4px);
      box-shadow:var(--shadow);
      border-color:var(--border-strong);
    }
    .section-head{
      display:flex;
      justify-content:space-between;
      align-items:flex-end;
      gap:24px;
      margin-bottom:34px;
    }
    .section-head h2{
      font-size:clamp(1.8rem,3vw,2.75rem);
      font-weight:950;
      letter-spacing:-.045em;
      margin:0;
      line-height:1.12;
    }
    .section-head p{
      color:var(--muted);
      margin:0;
      max-width:560px;
    }
    .feature-strip{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:24px;
      align-items:stretch;
    }
    .panel-card{
      padding:32px;
      position:relative;
      overflow:hidden;
    }
    .panel-card:after{
      content:"";
      position:absolute;
      right:-80px;
      top:-80px;
      width:220px;
      height:220px;
      background:radial-gradient(circle,rgba(23,105,255,.14),transparent 68%);
    }
    .mini-title{
      font-weight:950;
      font-size:1.35rem;
      margin-bottom:12px;
      letter-spacing:-.02em;
    }
    .muted{color:var(--muted)}
    .check-list{
      list-style:none;
      padding:0;
      margin:22px 0 0;
      display:grid;
      gap:12px;
    }
    .check-list li{
      display:flex;
      gap:11px;
      align-items:flex-start;
      color:#34465e;
      font-weight:700;
    }
    .check-list i{color:var(--success);font-size:1.05rem;margin-top:3px}
    .feature-card{padding:24px;height:100%}
    .icon-box{
      width:48px;height:48px;
      border-radius:16px;
      background:var(--primary-50);
      color:var(--primary);
      display:flex;
      align-items:center;
      justify-content:center;
      font-size:1.35rem;
      margin-bottom:16px;
    }
    .feature-card h3{
      font-size:1.12rem;
      font-weight:950;
      margin-bottom:8px;
    }
    .screenshot-wrap{
      border-radius:var(--radius-lg);
      padding:14px;
      background:linear-gradient(180deg,#fff,#eef5ff);
      border:1px solid var(--border);
      box-shadow:var(--shadow);
    }
    .carousel{
      border-radius:22px;
      overflow:hidden;
      background:#fff;
    }
    .screen{
      min-height:390px;
      padding:28px;
      background:
        radial-gradient(circle at 80% 14%,rgba(24,199,255,.22),transparent 16rem),
        linear-gradient(135deg,#f8fbff,#ffffff);
    }
    .screen-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      margin-bottom:22px;
    }
    .screen-tabs{
      display:flex;
      gap:8px;
      flex-wrap:wrap;
    }
    .screen-tabs span{
      padding:8px 12px;
      border-radius:999px;
      background:#fff;
      border:1px solid var(--border);
      color:#456079;
      font-weight:900;
      font-size:.82rem;
    }
    .screen-tabs span.active{background:var(--primary);color:#fff;border-color:var(--primary)}
    .screen-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:18px;
    }
    .screen-block{
      background:#fff;
      border:1px solid var(--border);
      border-radius:20px;
      padding:20px;
      box-shadow:var(--shadow-sm);
    }
    .status-row{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:13px 0;
      border-bottom:1px solid #edf2f8;
      gap:12px;
    }
    .status-row:last-child{border-bottom:0}
    .status-row strong{font-size:.95rem}
    .badge-soft{
      display:inline-flex;
      align-items:center;
      gap:6px;
      border-radius:999px;
      padding:6px 10px;
      font-size:.78rem;
      font-weight:900;
      background:var(--primary-50);
      color:var(--primary-600);
      white-space:nowrap;
    }
    .progress-line{
      height:8px;
      border-radius:999px;
      background:#e7eef8;
      overflow:hidden;
      margin-top:10px;
    }
    .progress-line span{
      display:block;
      height:100%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--primary),var(--accent));
    }
    .carousel-control-prev,.carousel-control-next{
      width:46px;height:46px;
      top:auto;
      bottom:18px;
      opacity:1;
      border-radius:50%;
      background:rgba(15,27,51,.78);
      backdrop-filter:blur(12px);
    }
    .carousel-control-prev{left:auto;right:76px}
    .carousel-control-next{right:22px}
    .requirements{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:24px;
      align-items:start;
    }
    .require-card{padding:28px}
    .require-table{
      margin:0;
      border-collapse:separate;
      border-spacing:0 10px;
      width:100%;
    }
    .require-table th,.require-table td{
      padding:14px 16px;
      background:#fff;
      border-top:1px solid var(--border);
      border-bottom:1px solid var(--border);
    }
    .require-table th{
      width:34%;
      color:#35506d;
      font-weight:950;
      border-left:1px solid var(--border);
      border-radius:14px 0 0 14px;
      background:#f8fbff;
    }
    .require-table td{
      color:var(--muted);
      border-right:1px solid var(--border);
      border-radius:0 14px 14px 0;
      font-weight:700;
    }
    .step-list{
      counter-reset:step;
      display:grid;
      gap:14px;
      margin-top:18px;
    }
    .step-item{
      display:grid;
      grid-template-columns:auto 1fr;
      gap:14px;
      align-items:start;
      padding:16px;
      border:1px solid var(--border);
      border-radius:18px;
      background:#fff;
    }
    .step-item:before{
      counter-increment:step;
      content:counter(step);
      width:34px;height:34px;
      border-radius:12px;
      display:flex;align-items:center;justify-content:center;
      color:#fff;
      font-weight:950;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      box-shadow:0 10px 20px rgba(23,105,255,.18);
    }
    .step-item strong{display:block;margin-bottom:4px}
    .reviews-grid{
      display:grid;
      grid-template-columns:1fr 1.05fr .95fr;
      gap:18px;
    }
    .review-card{padding:24px}
    .stars{color:#f59e0b;letter-spacing:2px;margin-bottom:12px}
    .review-card p{color:#475569;margin-bottom:18px}
    .reviewer{
      display:flex;
      align-items:center;
      gap:12px;
      padding-top:14px;
      border-top:1px solid var(--border);
    }
    .avatar{
      width:42px;height:42px;
      border-radius:50%;
      display:flex;align-items:center;justify-content:center;
      background:linear-gradient(135deg,var(--primary-50),#fff);
      color:var(--primary);
      font-weight:950;
      border:1px solid var(--border);
    }
    .download-zone{
      background:
        radial-gradient(circle at 12% 8%, rgba(23,105,255,.14), transparent 22rem),
        linear-gradient(180deg,#fff,#f5f9ff);
      border-top:1px solid var(--border);
      border-bottom:1px solid var(--border);
    }
    .download-card{
      padding:34px;
      display:grid;
      grid-template-columns:1fr auto;
      gap:24px;
      align-items:center;
    }
    .download-buttons{
      display:flex;
      gap:12px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .download-note{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      margin-top:18px;
    }
    .download-note span{
      font-size:.84rem;
      color:#4b6179;
      font-weight:800;
      padding:7px 10px;
      border-radius:999px;
      background:#f4f8ff;
      border:1px solid var(--border);
    }
    .faq-wrap{
      display:grid;
      grid-template-columns:.72fr 1.28fr;
      gap:28px;
      align-items:start;
    }
    .faq-card{padding:26px;position:sticky;top:104px}
    .accordion-item{
      border:1px solid var(--border)!important;
      border-radius:18px!important;
      overflow:hidden;
      margin-bottom:14px;
      box-shadow:var(--shadow-sm);
    }
    .accordion-button{
      font-weight:950;
      color:var(--ink);
      padding:20px 22px;
      background:#fff;
      box-shadow:none!important;
    }
    .accordion-button:not(.collapsed){
      color:var(--primary-600);
      background:var(--primary-50);
    }
    .accordion-button:focus{box-shadow:0 0 0 4px rgba(23,105,255,.13)!important}
    .accordion-body{color:var(--muted);padding:18px 22px 22px}
    .site-footer{
      padding:52px 0 28px;
      background:#0b1428;
      color:#dbeafe;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.15fr .85fr;
      gap:32px;
      padding-bottom:30px;
      border-bottom:1px solid rgba(255,255,255,.12);
    }
    .footer-brand{
      display:flex;
      align-items:center;
      gap:12px;
      margin-bottom:16px;
    }
    .site-footer .brand-text{color:#fff}
    .site-footer .brand-text small{color:#9fb2d0}
    .site-footer p{color:#aebed6;max-width:620px}
    .small-muted{color:#8fa2bd!important}
    .footer-links{
      display:flex;
      justify-content:flex-end;
      gap:12px;
      flex-wrap:wrap;
    }
    .footer-links a{
      display:inline-flex;
      align-items:center;
      min-height:42px;
      padding:9px 14px;
      border-radius:999px;
      color:#c8d8ef;
      background:rgba(255,255,255,.06);
      border:1px solid rgba(255,255,255,.1);
      font-weight:850;
    }
    .footer-links a:hover,.footer-links a.active{
      color:#fff;
      background:rgba(23,105,255,.35);
      border-color:rgba(24,199,255,.35);
    }
    .footer-copy{
      display:flex;
      justify-content:space-between;
      gap:18px;
      flex-wrap:wrap;
      padding-top:22px;
      color:#c8d8ef;
      font-weight:800;
    }
    .focus-ring:focus-visible,a:focus-visible,button:focus-visible{
      outline:4px solid rgba(23,105,255,.18);
      outline-offset:3px;
    }
    @media (max-width:1024px){
      .hero-copy{padding:42px}
      .feature-strip,.requirements,.faq-wrap{grid-template-columns:1fr}
      .reviews-grid{grid-template-columns:1fr 1fr}
      .faq-card{position:static}
      .download-card{grid-template-columns:1fr}
      .download-buttons{justify-content:flex-start}
    }
    @media (max-width:991.98px){
      .navbar-collapse{
        margin-top:14px;
        padding:16px;
        border:1px solid var(--border);
        border-radius:20px;
        background:#fff;
        box-shadow:var(--shadow);
      }
      .navbar-nav{align-items:stretch!important}
      .nav-link{display:block}
      .header-note{margin-top:12px}
      .hero-rank{margin:0 28px 28px}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
    }
    @media (max-width:768px){
      .section{padding:64px 0}
      .section-tight{padding:48px 0}
      .hero{padding:34px 0 54px}
      .hero-copy{padding:30px}
      .hero-actions .btn-brand,.hero-actions .btn-outline-panel,.btn-soft{width:100%}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .screen{min-height:auto;padding:20px}
      .screen-grid{grid-template-columns:1fr}
      .reviews-grid{grid-template-columns:1fr}
      .require-table th,.require-table td{display:block;width:100%;border-radius:14px;border:1px solid var(--border)}
      .require-table td{margin-top:-1px;background:#fff}
      .download-buttons .btn-brand,.download-buttons .btn-soft{width:100%}
    }
    @media (max-width:520px){
      .brand-mark{width:42px;height:42px;border-radius:14px}
      .brand-text{font-size:.94rem;max-width:230px}
      .brand-text small{font-size:.66rem}
      .hero h1{font-size:2rem}
      .hero-copy,.panel-card,.require-card,.download-card{padding:24px}
      .hero-rank{margin:0 18px 18px;padding:18px}
      .rank-item{grid-template-columns:auto 1fr}
      .rank-status{grid-column:2}
      .footer-copy{display:block}
      .footer-copy div+div{margin-top:8px}
    }