/* roulang page: index */
:root{
      --bg:#151018;
      --panel:#241a2b;
      --panel-2:#2b2032;
      --line:#4a3a55;
      --primary:#7cff6b;
      --secondary:#ff5fa2;
      --accent:#ffc857;
      --text:#f4eedf;
      --muted:#9c91a3;
      --warning:#ffb347;
    }
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      background:var(--bg);
      color:var(--text);
      line-height:1.78;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    ::selection{background:var(--primary);color:#140f18}
    .pixel-grid{
      background-image:
        linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
      background-size:26px 26px;
      mix-blend-mode:screen;
    }
    .scanline{
      background:linear-gradient(to bottom, rgba(255,255,255,.05) 0, rgba(255,255,255,0) 2px);
      background-size:100% 4px;
      opacity:.11;
    }
    .panel{
      background:linear-gradient(180deg, rgba(43,32,50,.96), rgba(36,26,43,.96));
      border:2px solid var(--line);
      box-shadow:4px 4px 0 rgba(0,0,0,.45);
    }
    .panel-strong{
      background:linear-gradient(180deg, rgba(48,35,57,.98), rgba(33,24,39,.98));
      border:2px solid var(--line);
      box-shadow:6px 6px 0 rgba(0,0,0,.45);
    }
    .panel:hover,
    .panel-strong:hover{
      border-color:var(--primary);
      transform:translate(-2px,-2px);
      transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
      box-shadow:6px 6px 0 rgba(0,0,0,.5);
    }
    .focus-ring:focus-visible{
      outline:3px solid var(--secondary);
      outline-offset:3px;
    }
    .btn-primary{
      background:var(--primary);
      color:#140f18;
      border:2px solid var(--primary);
      box-shadow:4px 4px 0 rgba(0,0,0,.45);
      transition:transform .2s ease,background-color .2s ease,color .2s ease,box-shadow .2s ease;
    }
    .btn-primary:hover{
      background:var(--secondary);
      color:#fff;
      transform:translate(-1px,-1px);
      box-shadow:5px 5px 0 rgba(0,0,0,.5);
    }
    .btn-ghost{
      background:transparent;
      color:var(--text);
      border:2px solid var(--line);
      box-shadow:4px 4px 0 rgba(0,0,0,.25);
      transition:transform .2s ease,border-color .2s ease,color .2s ease,box-shadow .2s ease;
    }
    .btn-ghost:hover{
      border-color:var(--accent);
      color:var(--accent);
      transform:translate(-1px,-1px);
      box-shadow:5px 5px 0 rgba(0,0,0,.35);
    }
    .btn-soft{
      background:rgba(124,255,107,.08);
      color:var(--primary);
      border:2px solid rgba(124,255,107,.45);
      box-shadow:4px 4px 0 rgba(0,0,0,.25);
    }
    .btn-soft:hover{
      background:rgba(255,95,162,.12);
      color:var(--text);
      border-color:var(--secondary);
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:.4rem;
      min-height:28px;
      padding:.25rem .6rem;
      border:1.5px solid var(--line);
      background:rgba(255,255,255,.03);
      color:var(--text);
      font-size:.78rem;
      letter-spacing:.03em;
    }
    .tag-primary{
      background:rgba(124,255,107,.14);
      border-color:rgba(124,255,107,.55);
      color:#dfffd8;
    }
    .tag-secondary{
      background:rgba(255,95,162,.14);
      border-color:rgba(255,95,162,.55);
      color:#ffd7e8;
    }
    .tag-accent{
      background:rgba(255,200,87,.14);
      border-color:rgba(255,200,87,.6);
      color:#ffe8b1;
    }
    .divider{
      height:1px;
      background:linear-gradient(90deg, transparent, rgba(255,255,255,.16), transparent);
    }
    .nav-link{
      position:relative;
      color:#d9cfde;
      transition:color .2s ease,transform .2s ease;
    }
    .nav-link:hover{color:var(--primary);transform:translateY(-1px)}
    .nav-link[aria-current="page"]{
      color:#fff;
      background:rgba(124,255,107,.1);
      border-color:rgba(124,255,107,.45);
    }
    .tab-active{
      color:#120d15;
      background:var(--primary);
      border-color:var(--primary);
    }
    .hero-play{
      width:80px;height:80px;
      border-radius:999px;
      display:grid;
      place-items:center;
      border:2px solid var(--secondary);
      background:linear-gradient(180deg, rgba(255,95,162,.16), rgba(255,200,87,.08));
      box-shadow:4px 4px 0 rgba(0,0,0,.45);
    }
    .faq-panel{
      border-top:1px solid rgba(255,255,255,.08);
    }
    .footer-link:hover{color:var(--primary)}

/* roulang page: category2 */
:root{
      --bg:#151018;
      --bg-2:#1A121D;
      --panel:#241A2B;
      --panel-2:#2B2032;
      --line:rgba(244,238,223,.16);
      --line-strong:rgba(124,255,107,.62);
      --primary:#7CFF6B;
      --primary-2:#52E6B8;
      --secondary:#FF5FA2;
      --warning:#FFC857;
      --text:#F4EEDF;
      --muted:#B9AEC2;
      --muted-2:#9C91A3;
      --shadow:4px 4px 0 rgba(0,0,0,.45);
      --shadow-lg:8px 8px 0 rgba(0,0,0,.55);
      --radius:4px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;background:var(--bg)}
    body{
      margin:0;
      min-height:100vh;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 10% 5%,rgba(255,95,162,.13),transparent 28%),
        radial-gradient(circle at 92% 14%,rgba(82,230,184,.12),transparent 25%),
        linear-gradient(180deg,var(--bg),#100c13 46%,var(--bg-2));
      line-height:1.75;
      overflow-x:hidden;
      padding-bottom:0;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      z-index:-2;
      background-image:
        linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
        linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
      background-size:22px 22px;
      opacity:.45;
    }
    body::after{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      z-index:80;
      background:linear-gradient(180deg,rgba(255,255,255,.04),transparent 42%,rgba(0,0,0,.05));
      mix-blend-mode:soft-light;
      opacity:.18;
    }
    a{color:inherit;text-decoration:none}
    img,svg{max-width:100%;display:block}
    button,input,summary{font:inherit}
    ::selection{background:rgba(124,255,107,.28);color:#fff}
    .container-page{width:min(100% - 2rem,80rem);margin-inline:auto}
    .pixel-panel{
      position:relative;
      border:2px solid var(--line);
      background:linear-gradient(180deg,rgba(43,32,50,.96),rgba(36,26,43,.96));
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .pixel-panel::before{
      content:"";
      position:absolute;
      inset:6px;
      border:1px solid rgba(255,255,255,.055);
      pointer-events:none;
    }
    .shadow-pixel{box-shadow:var(--shadow)}
    .divider{height:2px;background:repeating-linear-gradient(90deg,var(--primary) 0 14px,transparent 14px 24px,var(--secondary) 24px 34px,transparent 34px 44px);opacity:.62}
    .focus-ring:focus-visible{outline:3px solid var(--warning);outline-offset:3px}
    .nav-link{color:var(--muted);border-color:transparent;transition:transform .18s ease,color .18s ease,border-color .18s ease,background .18s ease,box-shadow .18s ease}
    .nav-link:hover{color:var(--text);border-color:var(--line);background:rgba(255,255,255,.04);transform:translate(-1px,-1px);box-shadow:3px 3px 0 rgba(0,0,0,.45)}
    .nav-link.is-active,.nav-link[aria-current="page"]{color:#071009;background:var(--primary);border-color:var(--primary);box-shadow:3px 3px 0 rgba(0,0,0,.55)}
    .btn-primary,.btn-secondary,.btn-ghost{
      min-height:44px;
      align-items:center;
      justify-content:center;
      border:2px solid transparent;
      transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
      box-shadow:var(--shadow);
    }
    .btn-primary{display:inline-flex;background:var(--primary);color:#071009;border-color:var(--primary)}
    .btn-primary:hover{background:var(--warning);border-color:var(--warning);transform:translate(-2px,-2px);box-shadow:7px 7px 0 rgba(0,0,0,.56)}
    .btn-secondary{display:inline-flex;background:rgba(255,95,162,.14);color:var(--text);border-color:var(--secondary)}
    .btn-secondary:hover{background:var(--secondary);color:#170711;transform:translate(-2px,-2px);box-shadow:7px 7px 0 rgba(0,0,0,.56)}
    .btn-ghost{display:inline-flex;background:rgba(255,255,255,.035);color:var(--text);border-color:var(--line)}
    .btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translate(-1px,-1px)}
    .badge{display:inline-flex;align-items:center;gap:.4rem;min-height:30px;border:2px solid var(--line);background:rgba(255,255,255,.04);padding:.2rem .65rem;border-radius:var(--radius);font-size:.78rem;font-weight:800;color:var(--text)}
    .badge-primary{border-color:rgba(124,255,107,.65);background:rgba(124,255,107,.13);color:var(--primary)}
    .badge-warning{border-color:rgba(255,200,87,.68);background:rgba(255,200,87,.12);color:var(--warning)}
    .badge-secondary{border-color:rgba(255,95,162,.62);background:rgba(255,95,162,.12);color:#ff8abd}
    .section-kicker{display:inline-flex;align-items:center;gap:.55rem;color:var(--primary);font-weight:900;letter-spacing:.08em;font-size:.8rem;text-transform:uppercase}
    .section-kicker::before{content:"";width:22px;height:10px;background:var(--primary);box-shadow:10px 0 0 rgba(124,255,107,.35)}
    .card-hover{transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease,background .18s ease}
    .card-hover:hover{transform:translate(-2px,-2px);border-color:var(--line-strong);box-shadow:8px 8px 0 rgba(0,0,0,.58);background:linear-gradient(180deg,rgba(43,32,50,1),rgba(31,23,38,1))}
    .hero-burst{position:absolute;right:1rem;top:-1.1rem;rotate:3deg;background:var(--secondary);color:#fff;border:2px solid #ffd8e9;box-shadow:5px 5px 0 rgba(0,0,0,.55);padding:.55rem .8rem;font-weight:950;font-size:.86rem;letter-spacing:.04em}
    .step-node{display:flex;align-items:center;justify-content:center;width:3rem;height:3rem;border:2px solid var(--primary);background:rgba(124,255,107,.13);color:var(--primary);font-weight:950;box-shadow:4px 4px 0 rgba(0,0,0,.42);flex:0 0 auto}
    .check-row{display:grid;grid-template-columns:auto 1fr;gap:.8rem;padding:1rem;border:2px solid var(--line);background:rgba(255,255,255,.035);box-shadow:3px 3px 0 rgba(0,0,0,.34)}
    .check-box{width:1.25rem;height:1.25rem;margin-top:.2rem;border:2px solid var(--primary);background:rgba(124,255,107,.1);position:relative}
    .check-box::after{content:"";position:absolute;left:.28rem;top:.05rem;width:.42rem;height:.72rem;border:solid var(--primary);border-width:0 3px 3px 0;transform:rotate(45deg)}
    details.faq-item{border:2px solid var(--line);background:rgba(255,255,255,.035);box-shadow:4px 4px 0 rgba(0,0,0,.35);border-radius:var(--radius);overflow:hidden}
    details.faq-item[open]{border-color:rgba(124,255,107,.52);background:rgba(124,255,107,.055)}
    details.faq-item summary{min-height:54px;cursor:pointer;list-style:none;padding:1rem 1.1rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;font-weight:850;color:#fff}
    details.faq-item summary::-webkit-details-marker{display:none}
    details.faq-item summary::after{content:"+";display:grid;place-items:center;width:28px;height:28px;border:2px solid var(--primary);color:var(--primary);font-weight:950;flex:0 0 auto}
    details.faq-item[open] summary::after{content:"−";border-color:var(--warning);color:var(--warning)}
    .faq-body{border-top:2px solid var(--line);padding:1rem 1.1rem;color:var(--muted);background:rgba(0,0,0,.16)}
    .mobile-tab{position:fixed;left:0;right:0;bottom:0;z-index:60;border-top:2px solid rgba(255,255,255,.1);background:#151018;padding:.45rem .75rem calc(.45rem + env(safe-area-inset-bottom));box-shadow:0 -8px 24px rgba(0,0,0,.36)}
    .mobile-tab a{min-height:50px;color:var(--muted);border:2px solid transparent;border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.15rem;font-size:.72rem;font-weight:800;transition:color .18s ease,border-color .18s ease,background .18s ease}
    .mobile-tab a[aria-current="page"]{color:#071009;background:var(--primary);border-color:var(--primary)}
    .footer-link{transition:color .18s ease,transform .18s ease}
    .footer-link:hover{color:var(--primary);transform:translateX(3px)}
    .warning-stripe{background:repeating-linear-gradient(135deg,rgba(255,200,87,.18) 0 10px,rgba(255,200,87,.06) 10px 20px)}
    .mini-grid{background-image:linear-gradient(rgba(124,255,107,.12) 1px,transparent 1px),linear-gradient(90deg,rgba(124,255,107,.12) 1px,transparent 1px);background-size:14px 14px}
    @media (max-width: 1024px){
      .hero-burst{right:.75rem;top:-.8rem;font-size:.78rem}
    }
    @media (max-width: 768px){
      body{padding-bottom:84px}
      .container-page{width:min(100% - 1.25rem,80rem)}
      .pixel-panel::before{inset:4px}
      .hero-burst{position:relative;right:auto;top:auto;display:inline-flex;margin-bottom:1rem}
    }
    @media (max-width: 520px){
      .btn-primary,.btn-secondary,.btn-ghost{width:100%}
      .badge{font-size:.72rem}
      details.faq-item summary{align-items:flex-start}
    }

/* roulang page: category1 */
:root{
      --bg:#151018;
      --bg-deep:#100b13;
      --panel:#241A2B;
      --panel-2:#2B2032;
      --line:rgba(244,238,223,.18);
      --line-strong:rgba(124,255,107,.65);
      --primary:#7CFF6B;
      --primary-dark:#2ecb60;
      --secondary:#FF5FA2;
      --warning:#FFC857;
      --cyan:#52E6B8;
      --text:#F4EEDF;
      --muted:#B5AABC;
      --muted-2:#9C91A3;
      --shadow:4px 4px 0 rgba(0,0,0,.45);
      --shadow-strong:7px 7px 0 rgba(0,0,0,.58);
      --radius:4px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      min-height:100vh;
      background:
        linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
        linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px),
        radial-gradient(circle at 18% 8%,rgba(255,95,162,.14),transparent 28%),
        radial-gradient(circle at 86% 20%,rgba(82,230,184,.11),transparent 28%),
        var(--bg);
      background-size:24px 24px,24px 24px,auto,auto,auto;
      color:var(--text);
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      line-height:1.75;
      letter-spacing:0;
      overflow-x:hidden;
      padding-bottom:0;
    }
    a{color:inherit;text-decoration:none}
    button,input,select,textarea{font:inherit}
    img{max-width:100%;display:block}
    ::selection{background:var(--primary);color:#101010}
    .container-safe{width:min(100% - 2rem,80rem);margin-inline:auto}
    .pixel-border{border:2px solid var(--line);box-shadow:inset 0 0 0 1px rgba(255,255,255,.035),var(--shadow)}
    .pixel-shadow{box-shadow:var(--shadow)}
    .shadow-pixel{box-shadow:3px 3px 0 rgba(0,0,0,.5)}
    .focus-ring:focus-visible{outline:3px solid var(--warning);outline-offset:3px}
    .nav-link{color:var(--muted);transition:color .18s ease,border-color .18s ease,background-color .18s ease,transform .18s ease}
    .nav-link:hover{color:var(--primary);border-color:var(--line-strong);background:rgba(124,255,107,.08);transform:translateY(-1px)}
    .nav-link[aria-current="page"]{color:#101010;background:var(--primary);border-color:var(--primary);box-shadow:3px 3px 0 rgba(0,0,0,.45)}
    .footer-link{transition:color .18s ease,transform .18s ease}
    .footer-link:hover{color:var(--primary);transform:translateX(4px)}
    .btn-primary,.btn-secondary,.btn-ghost{
      min-height:44px;
      align-items:center;
      justify-content:center;
      border:2px solid transparent;
      box-shadow:4px 4px 0 rgba(0,0,0,.5);
      transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease;
    }
    .btn-primary{background:var(--primary);color:#101010;border-color:var(--primary)}
    .btn-primary:hover{background:var(--warning);border-color:var(--warning);transform:translate(-1px,-1px);box-shadow:6px 6px 0 rgba(0,0,0,.58)}
    .btn-secondary{background:rgba(255,95,162,.14);color:var(--text);border-color:rgba(255,95,162,.62)}
    .btn-secondary:hover{background:var(--secondary);color:#101010;transform:translate(-1px,-1px);box-shadow:6px 6px 0 rgba(0,0,0,.58)}
    .btn-ghost{background:rgba(244,238,223,.04);color:var(--text);border-color:var(--line)}
    .btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translate(-1px,-1px)}
    .badge{
      display:inline-flex;
      align-items:center;
      gap:.4rem;
      min-height:28px;
      border:1px solid var(--line);
      background:rgba(244,238,223,.055);
      color:var(--muted);
      padding:.18rem .55rem;
      font-size:.78rem;
      font-weight:800;
    }
    .badge-primary{border-color:rgba(124,255,107,.65);background:rgba(124,255,107,.14);color:var(--primary)}
    .badge-secondary{border-color:rgba(255,95,162,.65);background:rgba(255,95,162,.13);color:#ff9cc4}
    .badge-warning{border-color:rgba(255,200,87,.7);background:rgba(255,200,87,.14);color:var(--warning)}
    .section{padding:72px 0}
    .section-tight{padding:48px 0}
    .divider{height:2px;background:repeating-linear-gradient(90deg,var(--line) 0 12px,transparent 12px 18px)}
    .hero-panel{
      position:relative;
      overflow:hidden;
      background:
        linear-gradient(180deg,rgba(36,26,43,.98),rgba(26,18,31,.98)),
        var(--panel);
    }
    .hero-panel::after{
      content:"";
      position:absolute;
      inset:0;
      pointer-events:none;
      background:repeating-linear-gradient(180deg,rgba(255,255,255,.035) 0 1px,transparent 1px 6px);
      opacity:.22;
    }
    .card{
      background:linear-gradient(180deg,rgba(43,32,50,.96),rgba(36,26,43,.96));
      border:2px solid var(--line);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
      transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease,background-color .18s ease;
    }
    .card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-strong)}
    .pixel-tab{
      min-height:42px;
      border:2px solid var(--line);
      background:rgba(244,238,223,.035);
      color:var(--muted);
      box-shadow:3px 3px 0 rgba(0,0,0,.42);
      transition:all .18s ease;
    }
    .pixel-tab:hover,.pixel-tab.active{border-color:var(--primary);background:rgba(124,255,107,.15);color:var(--primary);transform:translateY(-1px)}
    .matrix-cell{
      min-height:154px;
      background:
        linear-gradient(135deg,rgba(124,255,107,.12) 0 18%,transparent 18% 100%),
        linear-gradient(180deg,rgba(43,32,50,.96),rgba(32,23,38,.96));
    }
    .spec-row{display:grid;grid-template-columns:1.1fr 1.2fr 1.2fr;gap:0;border-top:2px solid var(--line)}
    .spec-row>div{padding:1rem;border-right:2px solid var(--line)}
    .spec-row>div:last-child{border-right:0}
    .faq-item{border:2px solid var(--line);background:rgba(36,26,43,.92);box-shadow:var(--shadow);border-radius:var(--radius);overflow:hidden}
    .faq-item summary{
      min-height:52px;
      cursor:pointer;
      list-style:none;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      padding:1rem 1.1rem;
      font-weight:900;
      color:var(--text);
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary::after{content:"+";color:var(--primary);font-size:1.35rem;font-weight:900}
    .faq-item[open] summary::after{content:"−";color:var(--warning)}
    .faq-body{border-top:2px solid var(--line);background:rgba(16,11,19,.44);padding:1rem 1.1rem;color:var(--muted);font-size:.95rem}
    .bottom-tab{
      position:fixed;
      left:0;
      right:0;
      bottom:0;
      z-index:50;
      display:none;
      border-top:2px solid rgba(255,255,255,.1);
      background:rgba(21,16,24,.98);
      padding:.45rem .65rem calc(.45rem + env(safe-area-inset-bottom));
    }
    .bottom-tab a{
      min-height:48px;
      display:flex;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      gap:.1rem;
      color:var(--muted);
      border:1px solid transparent;
      border-radius:4px;
      font-size:.72rem;
      font-weight:800;
    }
    .bottom-tab a[aria-current="page"]{color:var(--primary);border-color:rgba(124,255,107,.46);background:rgba(124,255,107,.08)}
    .bottom-tab svg{width:18px;height:18px}
    @media (max-width:1024px){
      .section{padding:64px 0}
      .spec-row{grid-template-columns:1fr}
      .spec-row>div{border-right:0;border-bottom:2px solid var(--line)}
      .spec-row>div:last-child{border-bottom:0}
    }
    @media (max-width:767px){
      body{padding-bottom:82px}
      .section{padding:56px 0}
      .section-tight{padding:38px 0}
      .bottom-tab{display:grid;grid-template-columns:repeat(3,1fr);gap:.35rem}
      .hero-title{font-size:2rem;line-height:1.16}
    }
    @media (max-width:520px){
      .container-safe{width:min(100% - 1.25rem,80rem)}
      .btn-primary,.btn-secondary,.btn-ghost{width:100%}
      .badge{font-size:.72rem}
    }