/* roulang page: index */
:root{
      --bg:#0d1014;
      --bg-2:#11151b;
      --panel:#141922;
      --panel-2:#171d27;
      --line:#263041;
      --line-2:#334155;
      --text:#edf2f7;
      --muted:#94a3b8;
      --soft:#cbd5e1;
      --accent:#2ee6c5;
      --accent-2:#ff5a5f;
      --accent-3:#a8b3c7;
      --shadow:0 10px 24px rgba(0,0,0,.22);
      --shadow-2:0 16px 34px rgba(0,0,0,.3);
      --radius:8px;
      --radius-sm:6px;
      --container:1180px;
      --gap:24px;
      --transition:.18s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      background:
        linear-gradient(180deg, rgba(46,230,197,.04), transparent 18%),
        linear-gradient(135deg, rgba(255,90,95,.03), transparent 26%),
        var(--bg);
      color:var(--text);
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
      line-height:1.65;
      letter-spacing:0;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:color var(--transition),background var(--transition),border-color var(--transition),transform var(--transition),box-shadow var(--transition),opacity var(--transition)}
    a:hover{color:inherit}
    img,svg{display:block;max-width:100%}
    button,input,textarea,select{font:inherit}
    button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
      outline:2px solid rgba(46,230,197,.7);
      outline-offset:2px;
    }
    ::selection{background:rgba(46,230,197,.26);color:var(--text)}
    .container{max-width:var(--container)}
    .site-header{
      position:sticky;
      top:14px;
      z-index:1030;
      padding:0 12px;
    }
    .nav-shell{
      display:flex;
      align-items:center;
      gap:14px;
      justify-content:space-between;
      padding:12px 16px;
      border:1px solid rgba(255,255,255,.08);
      background:rgba(12,15,20,.82);
      backdrop-filter:blur(14px);
      border-radius:999px;
      box-shadow:var(--shadow);
    }
    .brand{
      display:inline-flex;
      align-items:center;
      gap:10px;
      flex:0 0 auto;
      font-weight:800;
      color:var(--text);
      letter-spacing:0;
      white-space:nowrap;
    }
    .brand-mark{
      width:34px;
      height:34px;
      border-radius:8px;
      display:grid;
      place-items:center;
      border:1px solid rgba(46,230,197,.35);
      background:linear-gradient(135deg, rgba(46,230,197,.14), rgba(255,90,95,.08));
      color:var(--accent);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
      flex:0 0 auto;
    }
    .brand span{
      font-size:1rem;
      line-height:1;
    }
    .site-nav{
      display:flex;
      align-items:center;
      gap:8px;
      flex:1 1 auto;
      justify-content:flex-start;
      overflow:auto;
      padding:2px 0;
      scrollbar-width:none;
    }
    .site-nav::-webkit-scrollbar{display:none}
    .nav-link-pill{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:9px 14px;
      border-radius:999px;
      color:var(--soft);
      border:1px solid transparent;
      background:transparent;
      white-space:nowrap;
      flex:0 0 auto;
    }
    .nav-link-pill:hover{
      color:var(--text);
      border-color:rgba(46,230,197,.16);
      background:rgba(255,255,255,.03);
    }
    .nav-link-pill.active{
      color:var(--text);
      border-color:rgba(46,230,197,.26);
      background:rgba(46,230,197,.09);
    }
    .nav-cta{
      flex:0 0 auto;
    }
    .btn-soft,
    .btn-accent{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:48px;
      padding:0 18px;
      border-radius:999px;
      font-weight:700;
      border:1px solid transparent;
      letter-spacing:0;
      box-shadow:none;
      white-space:nowrap;
    }
    .btn-accent{
      color:#081014;
      background:linear-gradient(135deg, var(--accent), #8ff4e2);
      border-color:rgba(46,230,197,.5);
      box-shadow:0 10px 20px rgba(46,230,197,.12);
    }
    .btn-accent:hover{
      color:#061015;
      transform:translateY(-1px);
      box-shadow:0 14px 24px rgba(46,230,197,.18);
      border-color:rgba(46,230,197,.75);
    }
    .btn-soft{
      color:var(--text);
      background:rgba(255,255,255,.03);
      border-color:rgba(255,255,255,.1);
    }
    .btn-soft:hover{
      color:var(--text);
      background:rgba(255,255,255,.05);
      border-color:rgba(255,255,255,.16);
      transform:translateY(-1px);
    }
    .btn-outline-accent{
      color:var(--text);
      background:transparent;
      border:1px solid rgba(46,230,197,.42);
    }
    .btn-outline-accent:hover{
      color:var(--text);
      background:rgba(46,230,197,.09);
      border-color:rgba(46,230,197,.7);
      transform:translateY(-1px);
    }
    .hero-section{
      padding:34px 0 20px;
      position:relative;
    }
    .hero-shell{
      border:1px solid rgba(255,255,255,.07);
      background:
        linear-gradient(135deg, rgba(255,255,255,.03), rgba(255,255,255,.01)),
        linear-gradient(180deg, rgba(255,255,255,.02), transparent 28%),
        var(--bg-2);
      box-shadow:var(--shadow-2);
      border-radius:16px;
      overflow:hidden;
      position:relative;
    }
    .hero-shell:before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(115deg, transparent 0 48%, rgba(46,230,197,.06) 48% 52%, transparent 52% 100%),
        linear-gradient(180deg, rgba(255,255,255,.03), transparent 30%);
      pointer-events:none;
    }
    .hero-inner{
      padding:32px 24px 24px;
      position:relative;
      z-index:1;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      margin-bottom:16px;
      border-radius:999px;
      color:var(--accent);
      background:rgba(46,230,197,.08);
      border:1px solid rgba(46,230,197,.18);
      font-size:.92rem;
      font-weight:700;
    }
    .hero-title{
      margin:0;
      font-size:clamp(2rem, 3vw, 3.45rem);
      line-height:1.08;
      font-weight:900;
      letter-spacing:0;
      max-width:14ch;
    }
    .hero-copy{
      color:var(--soft);
      font-size:1.03rem;
      margin:18px 0 0;
      max-width:34rem;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:22px;
    }
    .hero-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:18px;
    }
    .meta-chip{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:8px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.03);
      color:var(--soft);
      border:1px solid rgba(255,255,255,.08);
      font-size:.88rem;
      white-space:nowrap;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:1.05fr 1.3fr .9fr;
      gap:18px;
      align-items:stretch;
    }
    .hero-copy-block{
      padding:6px 6px 0 0;
    }
    .hero-side{
      display:grid;
      gap:14px;
      align-content:start;
    }
    .side-card,
    .matrix-card,
    .step-card,
    .proof-card,
    .assure-card,
    .update-card,
    .cta-panel,
    .faq-shell,
    .quick-card{
      border:1px solid rgba(255,255,255,.08);
      background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.015));
      box-shadow:0 8px 18px rgba(0,0,0,.16);
      border-radius:var(--radius);
    }
    .side-card{
      padding:16px;
    }
    .side-card h3,
    .proof-card h3,
    .assure-card h3,
    .update-card h3,
    .cta-panel h2,
    .faq-title,
    .section-head h2,
    .matrix-card h3,
    .step-card h3{
      margin:0;
      font-weight:800;
      letter-spacing:0;
    }
    .side-card h3{
      font-size:1rem;
    }
    .check-list{
      list-style:none;
      padding:0;
      margin:12px 0 0;
      display:grid;
      gap:10px;
    }
    .check-list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:var(--soft);
      font-size:.94rem;
    }
    .check-bullet{
      width:18px;
      height:18px;
      flex:0 0 18px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:rgba(46,230,197,.1);
      color:var(--accent);
      margin-top:2px;
      font-size:.72rem;
    }
    .hero-stage{
      padding:0 2px;
    }
    .stage-frame{
      min-height:430px;
      border-radius:14px;
      overflow:hidden;
      border:1px solid rgba(255,255,255,.1);
      background:
        linear-gradient(180deg, rgba(46,230,197,.06), transparent 18%),
        linear-gradient(135deg, rgba(255,90,95,.07), transparent 35%),
        #0f1318;
      position:relative;
      box-shadow:inset 0 1px 0 rgba(255,255,255,.04);
    }
    .stage-frame:after{
      content:"";
      position:absolute;
      inset:auto 0 0 0;
      height:46px;
      background:linear-gradient(180deg, transparent, rgba(0,0,0,.28));
      pointer-events:none;
    }
    .stage-topbar{
      display:flex;
      justify-content:space-between;
      align-items:center;
      padding:14px 16px 10px;
      border-bottom:1px solid rgba(255,255,255,.07);
      color:var(--soft);
      font-size:.9rem;
    }
    .dot-row{
      display:flex;
      align-items:center;
      gap:6px;
    }
    .dot{
      width:9px;
      height:9px;
      border-radius:50%;
      background:rgba(255,255,255,.22);
    }
    .dot.accent{background:var(--accent)}
    .dot.red{background:var(--accent-2)}
    .stage-body{
      display:grid;
      grid-template-columns:.9fr 1.35fr .95fr;
      gap:14px;
      padding:16px;
      height:calc(100% - 50px);
    }
    .panel-mini{
      border:1px solid rgba(255,255,255,.08);
      border-radius:8px;
      background:rgba(255,255,255,.03);
      padding:14px;
    }
    .panel-mini + .panel-mini{margin-top:12px}
    .panel-mini h4{
      font-size:.95rem;
      margin:0 0 10px;
      font-weight:800;
    }
    .tiny-list{
      list-style:none;
      margin:0;
      padding:0;
      display:grid;
      gap:10px;
    }
    .tiny-list li{
      display:flex;
      justify-content:space-between;
      gap:10px;
      align-items:center;
      color:var(--soft);
      font-size:.88rem;
      border-bottom:1px solid rgba(255,255,255,.06);
      padding-bottom:10px;
    }
    .tiny-list li:last-child{border-bottom:0;padding-bottom:0}
    .tiny-list strong{color:var(--text)}
    .screen-card{
      border:1px solid rgba(255,255,255,.09);
      border-radius:10px;
      overflow:hidden;
      background:#11161d;
      display:flex;
      flex-direction:column;
      min-height:100%;
    }
    .screen-chip-row{
      display:flex;
      gap:8px;
      flex-wrap:wrap;
      padding:12px 12px 0;
    }
    .screen-chip{
      padding:5px 8px;
      border-radius:999px;
      background:rgba(46,230,197,.08);
      color:#dffdf8;
      border:1px solid rgba(46,230,197,.18);
      font-size:.74rem;
      white-space:nowrap;
    }
    .screen-list{
      list-style:none;
      padding:12px;
      margin:0;
      display:grid;
      gap:10px;
      flex:1 1 auto;
    }
    .screen-list li{
      display:grid;
      grid-template-columns:auto 1fr auto;
      gap:10px;
      align-items:center;
      padding:10px 10px;
      border-radius:8px;
      background:rgba(255,255,255,.03);
      border:1px solid rgba(255,255,255,.05);
    }
    .screen-badge{
      width:30px;
      height:30px;
      border-radius:8px;
      display:grid;
      place-items:center;
      background:rgba(46,230,197,.09);
      color:var(--accent);
      font-weight:800;
      font-size:.88rem;
    }
    .screen-list strong{
      display:block;
      font-size:.9rem;
    }
    .screen-list span{
      display:block;
      font-size:.78rem;
      color:var(--muted);
    }
    .screen-tag{
      color:var(--accent);
      font-size:.76rem;
      white-space:nowrap;
    }
    .signal-grid{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:10px;
    }
    .signal{
      padding:12px;
      border-radius:8px;
      border:1px solid rgba(255,255,255,.08);
      background:rgba(255,255,255,.03);
    }
    .signal b{
      display:block;
      font-size:1.2rem;
      line-height:1.1;
      margin-bottom:4px;
      color:var(--text);
    }
    .signal small{
      color:var(--muted);
      font-size:.8rem;
    }
    .trust-strip{
      margin-top:18px;
      padding:14px 18px;
      border-top:1px solid rgba(255,255,255,.07);
      background:rgba(255,255,255,.02);
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      align-items:center;
      justify-content:space-between;
    }
    .trust-items{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .trust-tag{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.04);
      color:var(--soft);
      border:1px solid rgba(255,255,255,.09);
      font-size:.88rem;
      white-space:nowrap;
    }
    .section-block{
      padding:64px 0 0;
    }
    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:16px;
      margin-bottom:20px;
      flex-wrap:wrap;
    }
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--accent);
      font-size:.9rem;
      font-weight:700;
      margin-bottom:8px;
    }
    .section-head h2{
      font-size:1.7rem;
      line-height:1.15;
    }
    .section-head p{
      max-width:56ch;
      margin:0;
      color:var(--muted);
      font-size:.97rem;
    }
    .matrix-grid{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:14px;
    }
    .matrix-card{
      padding:18px;
      transition:transform var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
      min-height:160px;
    }
    .matrix-card:hover,
    .step-card:hover,
    .proof-card:hover,
    .assure-card:hover,
    .update-card:hover,
    .quick-card:hover{
      transform:translateY(-2px);
      border-color:rgba(46,230,197,.22);
      box-shadow:0 12px 22px rgba(0,0,0,.22);
    }
    .matrix-icon,
    .step-num,
    .card-icon{
      width:38px;
      height:38px;
      display:grid;
      place-items:center;
      border-radius:8px;
      border:1px solid rgba(46,230,197,.22);
      background:rgba(46,230,197,.08);
      color:var(--accent);
      margin-bottom:14px;
      flex:0 0 auto;
    }
    .matrix-card h3{
      font-size:1.05rem;
      margin-bottom:8px;
    }
    .matrix-card p{
      color:var(--muted);
      font-size:.92rem;
      margin:0 0 14px;
      min-height:48px;
    }
    .link-action{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--text);
      font-weight:700;
      font-size:.92rem;
    }
    .step-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:14px;
    }
    .step-card{
      padding:18px;
      min-height:178px;
    }
    .step-head{
      display:flex;
      align-items:center;
      gap:12px;
      margin-bottom:14px;
    }
    .step-num{
      margin:0;
      font-weight:800;
      font-size:1rem;
      color:var(--text);
    }
    .step-card h3{
      font-size:1.05rem;
      margin-bottom:6px;
    }
    .step-card p{
      margin:0;
      color:var(--muted);
      font-size:.94rem;
    }
    .proof-layout{
      display:grid;
      grid-template-columns:1.2fr .8fr;
      gap:16px;
      align-items:stretch;
    }
    .proof-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:14px;
    }
    .proof-card{
      padding:18px;
    }
    .proof-card .metric{
      display:flex;
      align-items:baseline;
      gap:10px;
      margin:12px 0 10px;
    }
    .proof-card .metric b{
      font-size:1.65rem;
      line-height:1;
      color:var(--text);
    }
    .proof-card .metric span{
      color:var(--muted);
      font-size:.88rem;
    }
    .proof-card p{
      margin:0 0 10px;
      color:var(--soft);
      font-size:.94rem;
    }
    .quote{
      margin-top:auto;
      padding-top:12px;
      border-top:1px solid rgba(255,255,255,.08);
      color:var(--muted);
      font-size:.9rem;
    }
    .summary-panel{
      border:1px solid rgba(255,255,255,.08);
      background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.015));
      border-radius:var(--radius);
      padding:18px;
      display:flex;
      flex-direction:column;
      gap:14px;
      justify-content:space-between;
    }
    .summary-panel h3{
      margin:0;
      font-size:1.05rem;
      font-weight:800;
    }
    .summary-list{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:10px;
    }
    .summary-list li{
      display:flex;
      gap:10px;
      color:var(--soft);
      font-size:.94rem;
    }
    .summary-list i{
      color:var(--accent);
      margin-top:4px;
      flex:0 0 auto;
    }
    .platform-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:14px;
    }
    .assure-card{
      padding:18px;
    }
    .assure-card h3{
      font-size:1.02rem;
      margin-bottom:8px;
    }
    .assure-card p{
      margin:0;
      color:var(--muted);
      font-size:.93rem;
    }
    .updates-layout{
      display:grid;
      grid-template-columns:1.15fr .85fr;
      gap:16px;
      align-items:start;
    }
    .updates-list{
      display:grid;
      gap:12px;
    }
    .update-card{
      padding:16px;
      display:grid;
      grid-template-columns:auto 1fr auto;
      gap:14px;
      align-items:center;
    }
    .update-card .badge-time{
      color:var(--accent);
      font-size:.8rem;
      white-space:nowrap;
      padding:6px 10px;
      border-radius:999px;
      border:1px solid rgba(46,230,197,.22);
      background:rgba(46,230,197,.08);
    }
    .update-card h3{
      font-size:1rem;
      margin:0 0 4px;
    }
    .update-card p{
      margin:0;
      color:var(--muted);
      font-size:.9rem;
    }
    .update-side{
      padding:18px;
    }
    .quick-grid{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:12px;
      margin-top:14px;
    }
    .quick-card{
      padding:14px;
      min-height:120px;
    }
    .quick-card .mini{
      color:var(--accent);
      font-size:.8rem;
      margin-bottom:8px;
      display:inline-flex;
      align-items:center;
      gap:6px;
    }
    .quick-card strong{
      display:block;
      margin-bottom:6px;
      font-size:.98rem;
    }
    .quick-card span{
      color:var(--muted);
      font-size:.9rem;
    }
    .faq-shell{
      padding:18px;
    }
    .accordion{
      --bs-accordion-bg:transparent;
      --bs-accordion-border-color:rgba(255,255,255,.08);
      --bs-accordion-btn-bg:transparent;
      --bs-accordion-active-bg:rgba(46,230,197,.06);
      --bs-accordion-active-color:var(--text);
      --bs-accordion-btn-color:var(--text);
      --bs-accordion-btn-focus-box-shadow:none;
      --bs-accordion-btn-icon:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%232ee6c5'%3e%3cpath fill-rule='evenodd' d='M1.5 5.5a1 1 0 0 1 1.4 0L8 10.6l5.1-5.1a1 1 0 1 1 1.4 1.4l-5.8 5.8a1 1 0 0 1-1.4 0L1.5 6.9a1 1 0 0 1 0-1.4z'/%3e%3c/svg%3e");
      --bs-accordion-btn-icon-transform:rotate(-180deg);
      --bs-accordion-btn-icon-width:1rem;
    }
    .accordion-item{
      background:transparent;
      border-color:rgba(255,255,255,.08);
    }
    .accordion-button{
      padding:18px 0;
      background:transparent !important;
      box-shadow:none !important;
      border-radius:0 !important;
      font-weight:800;
    }
    .accordion-button:not(.collapsed){
      color:var(--text);
    }
    .accordion-body{
      padding:0 0 18px;
      color:var(--soft);
      line-height:1.75;
    }
    .cta-section{
      padding:64px 0 92px;
    }
    .cta-panel{
      padding:28px;
      background:
        linear-gradient(135deg, rgba(46,230,197,.12), rgba(255,90,95,.04)),
        linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.015));
      border-color:rgba(46,230,197,.2);
    }
    .cta-grid{
      display:grid;
      grid-template-columns:1fr .75fr;
      gap:18px;
      align-items:center;
    }
    .cta-panel h2{
      font-size:1.85rem;
      margin-bottom:10px;
    }
    .cta-panel p{
      margin:0;
      max-width:56ch;
      color:var(--soft);
      font-size:1rem;
    }
    .cta-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:20px;
    }
    .cta-notes{
      padding-left:0;
      margin:0;
      list-style:none;
      display:grid;
      gap:10px;
    }
    .cta-notes li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:var(--soft);
      font-size:.94rem;
    }
    .cta-notes i{
      color:var(--accent);
      margin-top:3px;
      flex:0 0 auto;
    }
    .site-footer{
      padding:22px 0 110px;
      border-top:1px solid rgba(255,255,255,.07);
      background:rgba(0,0,0,.12);
    }
    .footer-shell{
      display:flex;
      justify-content:space-between;
      gap:18px;
      flex-wrap:wrap;
      align-items:flex-start;
    }
    .footer-brand{
      display:grid;
      gap:10px;
      max-width:36rem;
    }
    .footer-brand p{
      margin:0;
      color:var(--muted);
      font-size:.92rem;
    }
    .footer-nav{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      align-items:center;
    }
    .footer-link{
      padding:8px 12px;
      border-radius:999px;
      color:var(--soft);
      border:1px solid rgba(255,255,255,.08);
      background:rgba(255,255,255,.02);
      font-size:.9rem;
    }
    .footer-link:hover{
      background:rgba(255,255,255,.05);
      border-color:rgba(46,230,197,.18);
    }
    .copyright{
      color:var(--muted);
      font-size:.88rem;
    }
    .mobile-cta{
      position:fixed;
      left:0;
      right:0;
      bottom:0;
      z-index:1050;
      padding:10px 12px 12px;
      background:linear-gradient(180deg, rgba(13,16,20,0), rgba(13,16,20,.88) 18%, rgba(13,16,20,.98));
      backdrop-filter:blur(14px);
      border-top:1px solid rgba(255,255,255,.08);
      display:none;
    }
    .mobile-cta .mobile-row{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:10px;
    }
    .mobile-cta .btn{
      min-height:50px;
      width:100%;
      border-radius:999px;
    }
    .section-note{
      color:var(--muted);
      font-size:.92rem;
    }
    .page-anchor{
      scroll-margin-top:100px;
    }
    @media (max-width: 1199.98px){
      .hero-grid{grid-template-columns:1fr}
      .hero-side{grid-template-columns:1fr 1fr}
      .stage-body{grid-template-columns:1fr 1.1fr .9fr}
      .matrix-grid,
      .proof-grid,
      .platform-grid{grid-template-columns:repeat(2,1fr)}
      .proof-layout,
      .updates-layout,
      .cta-grid{grid-template-columns:1fr}
    }
    @media (max-width: 991.98px){
      .site-header{top:8px}
      .nav-shell{border-radius:24px}
      .hero-title{max-width:none}
      .stage-frame{min-height:auto}
      .stage-body{grid-template-columns:1fr; height:auto}
      .signal-grid{grid-template-columns:repeat(4,1fr)}
      .hero-side{grid-template-columns:1fr}
      .matrix-grid,
      .step-grid,
      .proof-grid,
      .platform-grid{grid-template-columns:1fr 1fr}
      .quick-grid{grid-template-columns:1fr}
    }
    @media (max-width: 767.98px){
      .hero-section{padding-top:22px}
      .hero-inner{padding:22px 16px 16px}
      .hero-actions,
      .cta-actions{flex-direction:column}
      .hero-actions .btn,
      .cta-actions .btn{width:100%}
      .section-block,
      .cta-section{padding-top:50px}
      .matrix-grid,
      .step-grid,
      .proof-grid,
      .platform-grid,
      .signal-grid{grid-template-columns:1fr}
      .update-card{grid-template-columns:1fr; align-items:start}
      .site-nav{display:none}
      .nav-cta{margin-left:auto}
      .footer-shell{flex-direction:column}
      .mobile-cta{display:block}
      body{padding-bottom:94px}
    }
    @media (max-width: 520px){
      .nav-shell{padding:10px 12px}
      .brand span{font-size:.96rem}
      .brand-mark{width:30px;height:30px}
      .section-head h2{font-size:1.42rem}
      .cta-panel h2{font-size:1.55rem}
      .hero-title{font-size:1.9rem}
      .hero-copy, .section-head p, .cta-panel p{font-size:.95rem}
      .trust-strip{padding:12px 14px}
      .trust-tag,.meta-chip{font-size:.83rem}
      .stage-topbar{font-size:.82rem}
      .screen-list li{grid-template-columns:auto 1fr}
      .screen-tag{grid-column:2 / -1}
      .quick-card{min-height:auto}
    }

/* roulang page: category1 */
:root{
      --bg:#0b0d10;
      --bg-soft:#10141a;
      --panel:#141920;
      --panel-2:#171d25;
      --panel-3:#1b222c;
      --text:#f4efe7;
      --muted:#a7b0bc;
      --muted-2:#7f8996;
      --line:#27303b;
      --line-2:#34404e;
      --accent:#46e0bf;
      --accent-2:#ff5a66;
      --accent-3:#d9dde3;
      --shadow:0 10px 24px rgba(0,0,0,.26);
      --shadow-soft:0 8px 18px rgba(0,0,0,.18);
      --radius:8px;
      --radius-sm:6px;
      --space:24px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      background:
        linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,0) 160px),
        linear-gradient(135deg, rgba(70,224,191,.035), transparent 40%),
        linear-gradient(225deg, rgba(255,90,102,.028), transparent 35%),
        var(--bg);
      color:var(--text);
      font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
      line-height:1.6;
      letter-spacing:0;
      padding-bottom:0;
    }

    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background-image:
        linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
      background-size:36px 36px;
      mask-image: linear-gradient(180deg, rgba(0,0,0,.24), rgba(0,0,0,0) 20%);
      opacity:.22;
      z-index:0;
    }

    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    ::selection{background:rgba(70,224,191,.22);color:var(--text)}

    .page-wrap{
      position:relative;
      z-index:1;
    }

    .container{
      max-width:1200px;
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:1030;
      padding:12px 0;
      background:linear-gradient(180deg, rgba(11,13,16,.92), rgba(11,13,16,.76));
      backdrop-filter:saturate(140%) blur(14px);
      border-bottom:1px solid rgba(255,255,255,.04);
    }

    .nav-shell{
      display:flex;
      align-items:center;
      gap:16px;
      padding:10px 14px;
      background:rgba(18,22,28,.86);
      border:1px solid rgba(255,255,255,.06);
      border-radius:18px;
      box-shadow:var(--shadow-soft);
    }

    .brand{
      display:inline-flex;
      align-items:center;
      gap:10px;
      min-width:max-content;
      color:var(--text);
      font-weight:800;
      letter-spacing:0;
      line-height:1;
      white-space:nowrap;
    }

    .brand:hover{color:var(--text)}
    .brand-mark{
      width:34px;
      height:34px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      border-radius:10px;
      background:linear-gradient(180deg, rgba(70,224,191,.18), rgba(70,224,191,.08));
      border:1px solid rgba(70,224,191,.32);
      color:var(--accent);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
    }

    .site-nav{
      display:flex;
      align-items:center;
      gap:8px;
      margin-left:auto;
      margin-right:8px;
      overflow:auto;
      scrollbar-width:none;
    }
    .site-nav::-webkit-scrollbar{display:none}

    .nav-link-pill{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:38px;
      padding:0 14px;
      border-radius:999px;
      color:var(--muted);
      border:1px solid transparent;
      background:transparent;
      transition:transform .18s ease, background-color .18s ease, border-color .18s ease, color .18s ease, box-shadow .18s ease;
      white-space:nowrap;
      flex:0 0 auto;
    }

    .nav-link-pill:hover,
    .nav-link-pill:focus-visible{
      color:var(--text);
      background:rgba(255,255,255,.03);
      border-color:rgba(255,255,255,.08);
      outline:none;
      transform:translateY(-1px);
    }

    .nav-link-pill.active{
      color:#08110f;
      background:linear-gradient(180deg, rgba(70,224,191,1), rgba(70,224,191,.88));
      border-color:rgba(70,224,191,.66);
      box-shadow:0 10px 18px rgba(70,224,191,.16);
    }

    .nav-cta .btn{
      display:inline-flex;
      align-items:center;
      gap:8px;
      border-radius:999px;
      font-weight:700;
      min-height:40px;
      padding:0 16px;
    }

    .btn-accent{
      color:#08110f;
      background:linear-gradient(180deg, rgba(70,224,191,1), rgba(70,224,191,.88));
      border:1px solid rgba(70,224,191,.7);
      box-shadow:0 10px 20px rgba(70,224,191,.14);
    }

    .btn-accent:hover,
    .btn-accent:focus-visible{
      color:#08110f;
      background:linear-gradient(180deg, rgba(121,245,219,1), rgba(70,224,191,.96));
      border-color:rgba(121,245,219,.9);
      transform:translateY(-1px);
      box-shadow:0 14px 24px rgba(70,224,191,.18);
    }

    .btn-outline-soft{
      color:var(--text);
      border:1px solid rgba(255,255,255,.12);
      background:rgba(255,255,255,.02);
      box-shadow:none;
    }

    .btn-outline-soft:hover,
    .btn-outline-soft:focus-visible{
      color:var(--text);
      border-color:rgba(255,255,255,.24);
      background:rgba(255,255,255,.05);
      transform:translateY(-1px);
    }

    .btn{
      transition:transform .18s ease, background-color .18s ease, border-color .18s ease, color .18s ease, box-shadow .18s ease, opacity .18s ease;
    }
    .btn:focus-visible,
    .nav-link-pill:focus-visible,
    .form-control:focus,
    .form-select:focus{
      box-shadow:0 0 0 .2rem rgba(70,224,191,.14);
      border-color:rgba(70,224,191,.6);
    }

    .main{
      position:relative;
    }

    .section{
      padding:34px 0;
    }

    .section-tight{
      padding-top:20px;
      padding-bottom:20px;
    }

    .hero-stage{
      padding:24px 0 18px;
    }

    .hero-banner{
      padding:24px;
      border:1px solid rgba(255,255,255,.08);
      border-radius:16px;
      background:
        linear-gradient(135deg, rgba(255,255,255,.035), rgba(255,255,255,.012)),
        linear-gradient(180deg, rgba(20,25,32,.95), rgba(16,20,26,.96));
      box-shadow:var(--shadow);
    }

    .breadcrumb-line{
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:14px;
      color:var(--muted);
      font-size:.94rem;
    }

    .breadcrumb-line a{
      color:var(--muted);
    }
    .breadcrumb-line a:hover{color:var(--text)}

    .breadcrumb-line .sep{
      color:var(--muted-2);
      opacity:.8;
    }

    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:6px 10px;
      margin-bottom:14px;
      border-radius:999px;
      border:1px solid rgba(70,224,191,.22);
      color:#b9f9ea;
      background:rgba(70,224,191,.08);
      font-size:.88rem;
      font-weight:700;
      letter-spacing:0;
      width:max-content;
      max-width:100%;
    }

    .hero-title{
      margin:0 0 12px;
      font-size:clamp(2rem, 4vw, 3.4rem);
      line-height:1.06;
      font-weight:900;
      letter-spacing:0;
    }

    .hero-subtitle{
      margin:0;
      max-width:760px;
      color:var(--muted);
      font-size:1.02rem;
    }

    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:22px;
    }

    .hero-actions .btn{
      min-height:48px;
      padding:0 22px;
      border-radius:10px;
      font-weight:800;
    }

    .hero-side{
      height:100%;
      border-left:1px solid rgba(255,255,255,.08);
      padding-left:24px;
    }

    .mini-board{
      display:grid;
      gap:12px;
    }

    .mini-metric{
      display:flex;
      justify-content:space-between;
      align-items:flex-start;
      gap:14px;
      padding:14px 16px;
      border-radius:12px;
      background:rgba(255,255,255,.025);
      border:1px solid rgba(255,255,255,.07);
    }

    .mini-metric strong{
      display:block;
      color:var(--text);
      font-size:1.08rem;
      line-height:1.2;
      margin-bottom:4px;
    }

    .mini-metric span{
      display:block;
      color:var(--muted);
      font-size:.92rem;
    }

    .metric-value{
      color:var(--accent);
      font-weight:900;
      white-space:nowrap;
    }

    .spec-strip{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:12px;
      margin-top:18px;
    }

    .spec-chip{
      display:flex;
      align-items:center;
      gap:10px;
      padding:12px 14px;
      border-radius:12px;
      background:rgba(255,255,255,.025);
      border:1px solid rgba(255,255,255,.07);
      color:var(--text);
      min-height:58px;
    }

    .spec-chip i{
      color:var(--accent);
      flex:0 0 auto;
    }

    .spec-chip small{
      display:block;
      color:var(--muted);
      line-height:1.25;
    }

    .section-title{
      margin:0 0 10px;
      font-size:clamp(1.42rem, 2.3vw, 2rem);
      line-height:1.15;
      font-weight:900;
      letter-spacing:0;
    }

    .section-lead{
      margin:0;
      max-width:820px;
      color:var(--muted);
    }

    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:18px;
      margin-bottom:18px;
    }

    .section-head .section-title{
      margin-bottom:8px;
    }

    .step-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:14px;
    }

    .step-card,
    .proof-card,
    .entry-card,
    .panel-card{
      border-radius:var(--radius);
      border:1px solid rgba(255,255,255,.08);
      background:linear-gradient(180deg, rgba(20,25,32,.98), rgba(18,22,28,.98));
      box-shadow:var(--shadow-soft);
    }

    .step-card{
      padding:18px;
      min-height:160px;
    }

    .step-index{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width:36px;
      height:36px;
      border-radius:999px;
      background:rgba(70,224,191,.1);
      border:1px solid rgba(70,224,191,.26);
      color:#a7fff0;
      font-weight:900;
      margin-bottom:14px;
    }

    .step-card h3,
    .proof-card h3,
    .entry-card h3,
    .panel-card h3{
      margin:0 0 10px;
      font-size:1.05rem;
      line-height:1.3;
      font-weight:800;
      letter-spacing:0;
    }

    .step-card p,
    .proof-card p,
    .entry-card p,
    .panel-card p{
      margin:0;
      color:var(--muted);
      font-size:.96rem;
    }

    .proof-grid{
      display:grid;
      grid-template-columns:1.15fr .85fr;
      gap:14px;
    }

    .proof-card{
      padding:18px;
      height:100%;
    }

    .proof-list{
      display:grid;
      gap:12px;
    }

    .proof-item{
      display:flex;
      align-items:flex-start;
      gap:12px;
      padding:14px;
      border-radius:12px;
      border:1px solid rgba(255,255,255,.07);
      background:rgba(255,255,255,.02);
    }

    .proof-item .dot{
      width:10px;
      height:10px;
      margin-top:7px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 4px rgba(70,224,191,.12);
      flex:0 0 auto;
    }

    .proof-item strong{
      display:block;
      margin-bottom:4px;
      color:var(--text);
      line-height:1.25;
    }

    .proof-item span{
      color:var(--muted);
      font-size:.94rem;
    }

    .proof-metrics{
      display:grid;
      gap:12px;
    }

    .metric-row{
      padding:14px 16px;
      border-radius:12px;
      border:1px solid rgba(255,255,255,.07);
      background:rgba(255,255,255,.02);
    }

    .metric-row .label{
      color:var(--muted);
      font-size:.88rem;
      margin-bottom:8px;
    }

    .metric-row .value{
      display:flex;
      align-items:baseline;
      gap:8px;
      color:var(--text);
      font-weight:900;
      font-size:1.36rem;
      line-height:1;
    }

    .metric-row .value small{
      color:var(--muted);
      font-size:.86rem;
      font-weight:600;
    }

    .filter-layout{
      display:grid;
      grid-template-columns:320px minmax(0,1fr);
      gap:14px;
      align-items:start;
    }

    .filter-panel{
      position:sticky;
      top:98px;
      padding:18px;
    }

    .filter-panel h3{
      margin-bottom:10px;
    }

    .filter-note{
      color:var(--muted);
      font-size:.94rem;
      margin-bottom:14px;
    }

    .search-box{
      margin-bottom:14px;
    }

    .search-box .form-control{
      min-height:46px;
      border-radius:10px;
      background:rgba(255,255,255,.02);
      border:1px solid rgba(255,255,255,.08);
      color:var(--text);
    }

    .search-box .form-control::placeholder{color:var(--muted-2)}

    .filter-pills{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }

    .filter-pill{
      display:inline-flex;
      align-items:center;
      gap:8px;
      min-height:36px;
      padding:0 12px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.1);
      background:rgba(255,255,255,.02);
      color:var(--muted);
      cursor:pointer;
      transition:transform .18s ease, border-color .18s ease, background-color .18s ease, color .18s ease;
      user-select:none;
    }

    .filter-pill:hover,
    .filter-pill:focus-visible{
      border-color:rgba(255,255,255,.22);
      color:var(--text);
      background:rgba(255,255,255,.05);
      transform:translateY(-1px);
      outline:none;
    }

    .filter-pill.active{
      color:#08110f;
      border-color:rgba(70,224,191,.65);
      background:rgba(70,224,191,.98);
      box-shadow:0 10px 18px rgba(70,224,191,.14);
    }

    .entry-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:14px;
    }

    .entry-card{
      padding:18px;
      display:flex;
      flex-direction:column;
      min-height:228px;
    }

    .entry-head{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:12px;
      margin-bottom:10px;
    }

    .entry-title{
      margin:0;
      font-size:1.1rem;
      line-height:1.28;
      font-weight:800;
      letter-spacing:0;
    }

    .entry-status{
      display:inline-flex;
      align-items:center;
      gap:6px;
      min-height:28px;
      padding:0 10px;
      border-radius:999px;
      background:rgba(70,224,191,.08);
      border:1px solid rgba(70,224,191,.22);
      color:#b8fff0;
      font-size:.82rem;
      white-space:nowrap;
      flex:0 0 auto;
    }

    .entry-meta{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin:14px 0 16px;
    }

    .tag{
      display:inline-flex;
      align-items:center;
      min-height:28px;
      padding:0 10px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.1);
      background:rgba(255,255,255,.03);
      color:var(--muted);
      font-size:.82rem;
      white-space:nowrap;
    }

    .entry-foot{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      margin-top:auto;
      padding-top:14px;
      border-top:1px solid rgba(255,255,255,.08);
    }

    .entry-foot small{
      color:var(--muted-2);
    }

    .entry-card .btn{
      min-height:38px;
      padding:0 14px;
      border-radius:10px;
    }

    .entry-card.hidden{
      display:none !important;
    }

    .faq-wrap .accordion-item{
      border:1px solid rgba(255,255,255,.08);
      background:rgba(255,255,255,.02);
      border-radius:12px;
      overflow:hidden;
      margin-bottom:12px;
      box-shadow:var(--shadow-soft);
    }

    .faq-wrap .accordion-button{
      background:transparent;
      color:var(--text);
      font-weight:700;
      border:none;
      box-shadow:none;
      padding:16px 18px;
    }

    .faq-wrap .accordion-button:not(.collapsed){
      background:rgba(255,255,255,.03);
      color:var(--text);
      box-shadow:none;
    }

    .faq-wrap .accordion-button::after{
      filter:invert(1) grayscale(1) brightness(1.1);
      opacity:.88;
    }

    .faq-wrap .accordion-body{
      color:var(--muted);
      padding:0 18px 18px;
    }

    .cta-band{
      padding:22px;
      border-radius:16px;
      border:1px solid rgba(70,224,191,.18);
      background:
        linear-gradient(180deg, rgba(70,224,191,.08), rgba(70,224,191,.02)),
        linear-gradient(180deg, rgba(18,22,28,.98), rgba(16,20,26,.98));
      box-shadow:var(--shadow);
    }

    .cta-band .section-title{
      margin-bottom:10px;
    }

    .cta-band p{
      margin:0;
      color:var(--muted);
    }

    .cta-grid{
      display:grid;
      grid-template-columns:minmax(0,1fr) 260px;
      gap:16px;
      align-items:center;
    }

    .cta-points{
      display:grid;
      gap:10px;
      justify-items:start;
    }

    .cta-point{
      display:flex;
      align-items:center;
      gap:10px;
      color:var(--text);
      font-size:.95rem;
    }

    .cta-point i{
      color:var(--accent);
      flex:0 0 auto;
    }

    .cta-band .btn{
      min-height:50px;
      padding:0 22px;
      border-radius:10px;
      font-weight:800;
    }

    .site-footer{
      padding:28px 0 100px;
      color:var(--muted);
    }

    .footer-shell{
      padding-top:18px;
      border-top:1px solid rgba(255,255,255,.08);
      display:grid;
      grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);
      gap:18px;
    }

    .footer-brand p{
      margin:12px 0 14px;
      max-width:560px;
      color:var(--muted);
    }

    .copyright{
      color:var(--muted-2);
      font-size:.92rem;
    }

    .footer-nav{
      display:flex;
      flex-wrap:wrap;
      justify-content:flex-end;
      gap:12px;
      align-content:flex-start;
    }

    .footer-link{
      color:var(--muted);
      min-height:34px;
      display:inline-flex;
      align-items:center;
      padding:0 2px;
      border-bottom:1px solid transparent;
      transition:color .18s ease, border-color .18s ease;
    }

    .footer-link:hover,
    .footer-link:focus-visible{
      color:var(--text);
      border-color:rgba(255,255,255,.28);
      outline:none;
    }

    .mobile-cta{
      position:fixed;
      left:0;
      right:0;
      bottom:0;
      z-index:1035;
      display:none;
      padding:10px 12px calc(10px + env(safe-area-inset-bottom));
      background:linear-gradient(180deg, rgba(11,13,16,0), rgba(11,13,16,.88) 18%, rgba(11,13,16,.98));
      backdrop-filter:blur(16px);
    }

    .mobile-cta .bar{
      display:grid;
      grid-template-columns:1.15fr .85fr;
      gap:10px;
      padding:10px;
      border-radius:16px;
      border:1px solid rgba(255,255,255,.08);
      background:rgba(17,21,27,.94);
      box-shadow:var(--shadow);
    }

    .mobile-cta .btn{
      min-height:48px;
      border-radius:12px;
      font-weight:800;
      justify-content:center;
    }

    .mobile-cta .btn-outline-soft{
      border-color:rgba(255,255,255,.12);
    }

    .badge-soft{
      display:inline-flex;
      align-items:center;
      gap:6px;
      min-height:30px;
      padding:0 10px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.08);
      color:var(--muted);
      background:rgba(255,255,255,.02);
      font-size:.82rem;
      white-space:nowrap;
    }

    .hide-mobile{display:block}

    @media (max-width: 1199.98px){
      .filter-layout{grid-template-columns:280px minmax(0,1fr)}
      .hero-side{padding-left:18px}
      .spec-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
    }

    @media (max-width: 991.98px){
      .nav-shell{
        flex-wrap:wrap;
        gap:12px;
      }
      .site-nav{
        order:3;
        width:100%;
        margin:0;
        padding-top:4px;
      }
      .nav-cta{
        margin-left:auto;
      }
      .hero-side{
        border-left:none;
        padding-left:0;
        padding-top:18px;
        margin-top:18px;
        border-top:1px solid rgba(255,255,255,.08);
      }
      .hero-banner{
        padding:20px;
      }
      .step-grid{
        grid-template-columns:1fr;
      }
      .proof-grid,
      .filter-layout,
      .cta-grid,
      .footer-shell{
        grid-template-columns:1fr;
      }
      .filter-panel{
        position:relative;
        top:auto;
      }
      .entry-grid{
        grid-template-columns:1fr;
      }
      .footer-nav{
        justify-content:flex-start;
      }
    }

    @media (max-width: 767.98px){
      .section{padding:24px 0}
      .hero-stage{padding-top:18px}
      .hero-title{font-size:clamp(1.75rem, 8vw, 2.5rem)}
      .hero-actions{
        display:grid;
        grid-template-columns:1fr;
      }
      .spec-strip{
        grid-template-columns:1fr;
      }
      .section-head{
        display:block;
      }
      .section-head .section-lead{
        margin-top:6px;
      }
      .cta-band{
        padding:18px;
      }
      .site-footer{
        padding-bottom:124px;
      }
      .mobile-cta{
        display:block;
      }
      .hide-mobile{display:none}
      .nav-shell{
        padding:10px 12px;
        border-radius:16px;
      }
      .brand{
        font-size:.98rem;
      }
      .brand-mark{
        width:30px;
        height:30px;
      }
    }

    @media (max-width: 575.98px){
      .hero-banner,
      .step-card,
      .proof-card,
      .filter-panel,
      .entry-card,
      .cta-band{
        border-radius:12px;
      }
      .hero-banner{
        padding:18px;
      }
      .entry-foot{
        flex-direction:column;
        align-items:flex-start;
      }
      .nav-cta .btn{
        min-height:38px;
        padding-inline:14px;
      }
      .nav-link-pill{
        min-height:36px;
        padding:0 12px;
      }
    }