/* roulang page: index */
:root{
      --bg-0:#050912;
      --bg-1:#071523;
      --bg-2:#101722;
      --panel:#0d1b28cc;
      --panel-strong:#111f2de8;
      --line:rgba(166, 214, 230, .16);
      --line-strong:rgba(91, 240, 226, .34);
      --text:#edf7fb;
      --muted:#9eb4c2;
      --muted-2:#6f8798;
      --brand:#43f2df;
      --brand-2:#75a7ff;
      --accent:#b996ff;
      --warning:#ffd27a;
      --success:#73efad;
      --danger:#ff8ba3;
      --radius-sm:12px;
      --radius:20px;
      --radius-lg:28px;
      --shadow:0 18px 55px rgba(0,0,0,.34);
      --shadow-soft:0 12px 34px rgba(67,242,223,.08);
      --container:1180px;
      --nav-h:76px;
      --ease:cubic-bezier(.2,.8,.2,1);
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      min-height:100vh;
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      color:var(--text);
      line-height:1.72;
      background:
        radial-gradient(circle at 14% 8%, rgba(67,242,223,.14), transparent 30%),
        radial-gradient(circle at 82% 12%, rgba(185,150,255,.13), transparent 26%),
        radial-gradient(circle at 54% 70%, rgba(117,167,255,.08), transparent 31%),
        linear-gradient(135deg, var(--bg-0) 0%, #07111c 42%, #151719 100%);
      overflow-x:hidden;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      opacity:.32;
      background-image:
        linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
      background-size:46px 46px;
      mask-image:linear-gradient(to bottom, rgba(0,0,0,.7), transparent 85%);
      z-index:-2;
    }
    body::after{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      opacity:.09;
      background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(/%23n)' opacity='.55'/%3E%3C/svg%3E");
      z-index:-1;
    }

    a{color:inherit;text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease),transform .22s var(--ease)}
    a:hover{color:var(--brand)}
    img,svg{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    ::selection{background:rgba(67,242,223,.3);color:#fff}
    :focus-visible{outline:3px solid rgba(67,242,223,.42);outline-offset:3px;border-radius:12px}

    .site-container{
      width:min(var(--container), calc(100% - 40px));
      margin-inline:auto;
    }
    .section{
      padding:88px 0;
      position:relative;
    }
    .section-tight{padding:56px 0}
    .section-title{
      font-size:clamp(28px, 4vw, 46px);
      line-height:1.16;
      font-weight:800;
      letter-spacing:-.03em;
      margin:0 0 16px;
    }
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--brand);
      font-size:14px;
      font-weight:700;
      letter-spacing:.06em;
      margin-bottom:14px;
    }
    .section-kicker::before{
      content:"";
      width:22px;height:2px;border-radius:99px;
      background:linear-gradient(90deg,var(--brand),transparent);
    }
    .section-desc{
      color:var(--muted);
      max-width:760px;
      margin:0;
      font-size:16px;
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:1000;
      height:var(--nav-h);
      display:flex;
      align-items:center;
      background:rgba(5, 11, 18, .74);
      backdrop-filter:blur(18px);
      -webkit-backdrop-filter:blur(18px);
      border-bottom:1px solid var(--line);
      box-shadow:0 8px 28px rgba(0,0,0,.16);
    }
    .navbar{padding:0;width:100%}
    .navbar .site-container{
      display:flex;
      align-items:center;
      gap:22px;
    }
    .brand-logo{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:max-content;
      font-weight:800;
      letter-spacing:-.02em;
      color:#fff;
    }
    .logo-mark{
      width:36px;height:36px;border-radius:14px;
      display:grid;place-items:center;
      color:#001a1c;
      background:
        linear-gradient(135deg, rgba(67,242,223,1), rgba(117,167,255,.94) 56%, rgba(185,150,255,.96));
      box-shadow:0 0 26px rgba(67,242,223,.22);
      font-weight:900;
    }
    .brand-text{
      font-size:17px;
      white-space:nowrap;
    }
    .navbar-toggler{
      border:1px solid var(--line);
      border-radius:14px;
      padding:9px 11px;
      background:rgba(255,255,255,.04);
      color:var(--text);
      box-shadow:none!important;
    }
    .navbar-toggler-icon{
      width:22px;height:22px;
      background-image:none;
      position:relative;
    }
    .navbar-toggler-icon::before,
    .navbar-toggler-icon::after,
    .navbar-toggler-icon{
      border-top:2px solid rgba(237,247,251,.86);
    }
    .navbar-toggler-icon::before,
    .navbar-toggler-icon::after{
      content:"";
      position:absolute;
      left:0;width:22px;
    }
    .navbar-toggler-icon::before{top:7px}
    .navbar-toggler-icon::after{top:15px}
    .nav-wrap{
      flex:1;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .navbar-nav{
      gap:8px;
      align-items:center;
    }
    .nav-link{
      color:var(--muted);
      border:1px solid transparent;
      border-radius:999px;
      padding:9px 14px!important;
      font-weight:700;
      font-size:14px;
    }
    .nav-link:hover{
      color:#fff;
      background:rgba(255,255,255,.06);
      border-color:var(--line);
    }
    .nav-link.active{
      color:#061119!important;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      box-shadow:0 10px 26px rgba(67,242,223,.18);
    }
    .nav-actions{
      display:flex;
      align-items:center;
      gap:10px;
    }
    .nav-search{
      position:relative;
      width:230px;
    }
    .nav-search input{
      width:100%;
      height:42px;
      border:1px solid var(--line);
      background:rgba(255,255,255,.055);
      color:var(--text);
      border-radius:999px;
      padding:0 14px 0 38px;
      outline:none;
      transition:border-color .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
    }
    .nav-search input::placeholder{color:rgba(158,180,194,.78)}
    .nav-search input:focus{
      border-color:var(--line-strong);
      background:rgba(255,255,255,.075);
      box-shadow:0 0 0 4px rgba(67,242,223,.08);
    }
    .nav-search .search-dot{
      position:absolute;
      left:16px;top:50%;
      width:10px;height:10px;
      transform:translateY(-50%);
      border:2px solid var(--brand);
      border-radius:50%;
    }
    .nav-search .search-dot::after{
      content:"";
      position:absolute;
      width:6px;height:2px;
      right:-6px;bottom:-3px;
      background:var(--brand);
      transform:rotate(45deg);
      border-radius:8px;
    }

    .btn{
      border-radius:999px;
      border:1px solid transparent;
      font-weight:800;
      padding:11px 18px;
      line-height:1;
      transition:transform .22s var(--ease), box-shadow .22s var(--ease), background .22s var(--ease), border-color .22s var(--ease), color .22s var(--ease);
    }
    .btn:active{transform:translateY(1px) scale(.99)}
    .btn-primary-glow{
      color:#061016!important;
      background:linear-gradient(135deg,var(--brand),var(--brand-2) 58%, var(--accent));
      box-shadow:0 14px 34px rgba(67,242,223,.18), inset 0 1px 0 rgba(255,255,255,.55);
      position:relative;
      overflow:hidden;
    }
    .btn-primary-glow::before{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);
      transform:translateX(-120%);
      transition:transform .5s var(--ease);
    }
    .btn-primary-glow:hover{
      transform:translateY(-3px);
      box-shadow:0 18px 45px rgba(67,242,223,.26);
    }
    .btn-primary-glow:hover::before{transform:translateX(120%)}
    .btn-ghost{
      color:var(--text)!important;
      background:rgba(255,255,255,.045);
      border-color:var(--line);
      backdrop-filter:blur(10px);
    }
    .btn-ghost:hover{
      transform:translateY(-2px);
      border-color:var(--line-strong);
      background:rgba(67,242,223,.08);
      box-shadow:var(--shadow-soft);
    }
    .btn-text{
      padding:0;
      border:0;
      color:var(--brand);
      background:transparent;
      font-weight:800;
    }
    .badge-soft,.tag{
      display:inline-flex;
      align-items:center;
      gap:7px;
      border:1px solid var(--line);
      background:rgba(255,255,255,.055);
      color:var(--muted);
      border-radius:999px;
      padding:7px 11px;
      font-size:13px;
      font-weight:700;
      white-space:nowrap;
    }
    .tag.active,.badge-soft.hot{
      color:#061016;
      border-color:transparent;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
    }
    .tag .pin{
      width:7px;height:7px;border-radius:50%;
      background:var(--brand);
      box-shadow:0 0 12px var(--brand);
    }

    .hero{
      min-height:calc(100vh - var(--nav-h));
      display:flex;
      align-items:center;
      padding:86px 0 70px;
      position:relative;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:minmax(0, 1.05fr) minmax(360px, .95fr);
      gap:54px;
      align-items:center;
    }
    .hero h1{
      font-size:clamp(40px, 6.2vw, 74px);
      line-height:1.03;
      font-weight:900;
      letter-spacing:-.06em;
      margin:0 0 22px;
    }
    .hero h1 .shine{
      color:transparent;
      background:linear-gradient(120deg,#fff 0%, var(--brand) 44%, var(--accent) 100%);
      -webkit-background-clip:text;
      background-clip:text;
    }
    .hero-lead{
      max-width:680px;
      color:#b9c9d4;
      font-size:18px;
      margin:0 0 28px;
    }
    .hero-actions{
      display:flex;
      gap:14px;
      flex-wrap:wrap;
      margin-bottom:24px;
    }
    .hero-badges{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .visual-shell{
      position:relative;
      min-height:530px;
    }
    .visual-shell::before{
      content:"";
      position:absolute;
      width:320px;height:320px;
      border-radius:50%;
      right:8%;
      top:8%;
      background:radial-gradient(circle, rgba(67,242,223,.22), transparent 68%);
      filter:blur(4px);
    }
    .glass-card{
      border:1px solid var(--line);
      background:linear-gradient(180deg, rgba(20,37,52,.74), rgba(9,19,29,.66));
      box-shadow:var(--shadow);
      backdrop-filter:blur(18px);
      border-radius:var(--radius-lg);
      position:relative;
      overflow:hidden;
    }
    .glass-card::after{
      content:"";
      position:absolute;
      inset:0;
      pointer-events:none;
      background:linear-gradient(135deg, rgba(255,255,255,.12), transparent 32%, transparent 75%, rgba(67,242,223,.08));
      opacity:.7;
    }
    .player-card{
      position:absolute;
      inset:42px 0 auto 24px;
      padding:18px;
      max-width:520px;
      z-index:2;
    }
    .player-top{
      display:flex;justify-content:space-between;align-items:center;
      margin-bottom:15px;
      position:relative;z-index:1;
    }
    .signal{
      display:flex;gap:5px;align-items:end;
    }
    .signal span{
      width:5px;border-radius:99px;
      background:linear-gradient(var(--brand),var(--brand-2));
      opacity:.9;
    }
    .signal span:nth-child(1){height:12px}
    .signal span:nth-child(2){height:18px}
    .signal span:nth-child(3){height:25px}
    .screen{
      aspect-ratio:16/9;
      border-radius:22px;
      background:
        linear-gradient(135deg, rgba(67,242,223,.24), transparent 36%),
        linear-gradient(45deg, rgba(185,150,255,.18), transparent 48%),
        #091520;
      border:1px solid rgba(255,255,255,.08);
      display:grid;
      place-items:center;
      position:relative;
      overflow:hidden;
      z-index:1;
    }
    .screen::before{
      content:"";
      position:absolute;
      inset:16px;
      border-radius:18px;
      border:1px dashed rgba(255,255,255,.14);
    }
    .play{
      width:74px;height:74px;border-radius:50%;
      display:grid;place-items:center;
      background:rgba(255,255,255,.12);
      border:1px solid rgba(255,255,255,.2);
      box-shadow:0 0 0 10px rgba(67,242,223,.05);
      z-index:1;
    }
    .play::before{
      content:"";
      border-left:18px solid var(--brand);
      border-top:12px solid transparent;
      border-bottom:12px solid transparent;
      margin-left:5px;
    }
    .panel-row{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:12px;
      margin-top:14px;
      position:relative;z-index:1;
    }
    .mini-panel{
      padding:14px;
      border-radius:18px;
      background:rgba(255,255,255,.055);
      border:1px solid rgba(255,255,255,.08);
    }
    .mini-panel b{display:block;font-size:16px;margin-bottom:2px}
    .mini-panel span{color:var(--muted);font-size:13px}
    .float-card{
      position:absolute;
      right:8px;
      bottom:30px;
      width:260px;
      padding:18px;
      z-index:3;
    }
    .float-list{display:grid;gap:10px;position:relative;z-index:1}
    .float-item{
      display:flex;
      justify-content:space-between;
      gap:12px;
      padding:11px 12px;
      border-radius:15px;
      background:rgba(255,255,255,.06);
      border:1px solid rgba(255,255,255,.08);
      color:var(--muted);
      font-size:13px;
    }
    .float-item strong{color:#fff}
    .orbit-card{
      position:absolute;
      left:0;
      bottom:4px;
      width:210px;
      padding:16px;
      z-index:1;
    }
    .progress-line{
      height:7px;
      border-radius:99px;
      background:rgba(255,255,255,.08);
      overflow:hidden;
      margin-top:10px;
    }
    .progress-line span{
      display:block;height:100%;width:68%;
      background:linear-gradient(90deg,var(--brand),var(--accent));
      border-radius:inherit;
    }

    .trust-strip{
      padding:18px 0;
      border-top:1px solid var(--line);
      border-bottom:1px solid var(--line);
      background:rgba(255,255,255,.025);
    }
    .trust-grid{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:12px;
    }
    .trust-item{
      display:flex;align-items:center;gap:10px;
      color:var(--muted);
      font-size:14px;
      padding:12px 14px;
      border-radius:16px;
      background:rgba(255,255,255,.035);
      border:1px solid rgba(255,255,255,.06);
    }
    .trust-item i{
      width:10px;height:10px;border-radius:50%;
      background:var(--success);
      box-shadow:0 0 16px rgba(115,239,173,.45);
      flex:0 0 auto;
    }

    .feature-layout{
      display:grid;
      grid-template-columns:1.18fr .82fr;
      gap:18px;
      margin-top:34px;
    }
    .feature-main,.feature-side-card,.scene-panel,.category-card,.proof-card,.faq-wrap,.cta-box{
      border:1px solid var(--line);
      background:linear-gradient(180deg, rgba(18,34,49,.76), rgba(8,18,27,.62));
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-soft);
    }
    .feature-main{
      padding:30px;
      min-height:360px;
      display:grid;
      grid-template-columns:1fr .9fr;
      gap:22px;
      align-items:end;
      overflow:hidden;
      position:relative;
    }
    .feature-main::before{
      content:"";
      position:absolute;
      right:-90px;top:-90px;
      width:260px;height:260px;border-radius:50%;
      background:radial-gradient(circle, rgba(67,242,223,.16), transparent 72%);
    }
    .feature-copy{position:relative;z-index:1}
    .feature-copy h3,.feature-side-card h3,.scene-panel h3,.category-card h3,.proof-card h3{
      font-size:24px;
      font-weight:800;
      margin:0 0 10px;
      letter-spacing:-.02em;
    }
    .feature-copy p,.feature-side-card p,.scene-panel p,.category-card p,.proof-card p{
      color:var(--muted);
      margin:0;
    }
    .meter-box{
      position:relative;z-index:1;
      display:grid;gap:12px;
    }
    .meter{
      padding:14px;
      border:1px solid rgba(255,255,255,.08);
      border-radius:18px;
      background:rgba(255,255,255,.045);
    }
    .meter-head{
      display:flex;justify-content:space-between;
      font-size:13px;color:var(--muted);
      margin-bottom:9px;
    }
    .meter-bar{
      height:8px;border-radius:99px;background:rgba(255,255,255,.08);overflow:hidden;
    }
    .meter-bar span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--brand),var(--brand-2))}
    .feature-side{
      display:grid;
      gap:18px;
    }
    .feature-side-card{
      padding:26px;
      min-height:171px;
      transition:transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
    }
    .feature-side-card:hover{
      transform:translateY(-6px);
      border-color:var(--line-strong);
      box-shadow:0 18px 42px rgba(67,242,223,.1);
    }
    .icon-chip{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      margin-bottom:16px;
      color:#061016;
      font-weight:900;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      box-shadow:0 12px 26px rgba(67,242,223,.16);
    }

    .scene-grid{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:22px;
      align-items:stretch;
      margin-top:34px;
    }
    .scene-tabs{
      display:grid;
      gap:12px;
    }
    .scene-tab{
      border:1px solid var(--line);
      background:rgba(255,255,255,.04);
      border-radius:20px;
      padding:18px;
      cursor:pointer;
      transition:transform .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease);
    }
    .scene-tab:hover,.scene-tab.active{
      transform:translateX(4px);
      border-color:var(--line-strong);
      background:rgba(67,242,223,.08);
    }
    .scene-tab b{display:block;font-size:17px;margin-bottom:3px}
    .scene-tab span{color:var(--muted);font-size:14px}
    .scene-panel{
      padding:28px;
      overflow:hidden;
      position:relative;
    }
    .preview-grid{
      display:grid;
      grid-template-columns:1.25fr .75fr;
      gap:14px;
      margin-top:22px;
    }
    .preview-large,.preview-small{
      border-radius:22px;
      border:1px solid rgba(255,255,255,.09);
      background:linear-gradient(135deg, rgba(67,242,223,.12), rgba(185,150,255,.08)), rgba(255,255,255,.04);
      min-height:240px;
      padding:18px;
      position:relative;
      overflow:hidden;
    }
    .preview-large::before,.preview-small::before{
      content:"";
      position:absolute;
      inset:auto -20% -34% -20%;
      height:55%;
      background:linear-gradient(180deg,transparent,rgba(67,242,223,.12));
      transform:skewY(-6deg);
    }
    .preview-small{
      min-height:240px;
      display:grid;
      align-content:space-between;
    }
    .thumb-line{
      height:11px;border-radius:99px;background:rgba(255,255,255,.12);margin-bottom:10px;
    }
    .thumb-line:nth-child(2){width:74%}
    .thumb-line:nth-child(3){width:52%}

    .category-showcase{
      display:grid;
      grid-template-columns:.92fr 1.08fr;
      gap:24px;
      align-items:center;
      margin-top:34px;
    }
    .category-card{
      padding:30px;
      transition:transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
    }
    .category-card:hover{
      transform:translateY(-6px);
      border-color:var(--line-strong);
      box-shadow:0 20px 44px rgba(67,242,223,.1);
    }
    .category-tags{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin:22px 0 24px;
    }
    .entry-list{
      display:grid;
      gap:12px;
    }
    .entry-item{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:16px 18px;
      border:1px solid var(--line);
      background:rgba(255,255,255,.04);
      border-radius:18px;
      transition:transform .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease);
    }
    .entry-item:hover{
      transform:translateX(6px);
      border-color:var(--line-strong);
      background:rgba(67,242,223,.065);
    }
    .entry-item b{font-size:16px}
    .entry-item span{color:var(--muted);font-size:13px}
    .entry-arrow{
      width:34px;height:34px;border-radius:50%;
      display:grid;place-items:center;
      color:#061016;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      flex:0 0 auto;
      font-weight:900;
    }

    .steps{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:14px;
      margin-top:34px;
    }
    .step-card{
      border:1px solid var(--line);
      background:rgba(255,255,255,.04);
      border-radius:24px;
      padding:22px;
      min-height:190px;
      position:relative;
      overflow:hidden;
    }
    .step-card::before{
      content:attr(data-step);
      position:absolute;
      right:18px;top:8px;
      font-size:54px;
      line-height:1;
      font-weight:900;
      color:rgba(255,255,255,.045);
      letter-spacing:-.06em;
    }
    .step-card h3{
      font-size:19px;
      font-weight:800;
      margin:18px 0 8px;
      position:relative;
    }
    .step-card p{
      color:var(--muted);
      margin:0;
      position:relative;
      font-size:14px;
    }
    .step-dot{
      width:12px;height:12px;border-radius:50%;
      background:var(--brand);
      box-shadow:0 0 18px rgba(67,242,223,.55);
    }

    .proof-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:22px;
      margin-top:34px;
    }
    .proof-card{
      padding:28px;
    }
    .proof-list{
      display:grid;
      gap:13px;
      margin-top:18px;
    }
    .proof-line{
      display:flex;
      align-items:flex-start;
      gap:12px;
      color:var(--muted);
      padding:12px 0;
      border-bottom:1px solid rgba(255,255,255,.07);
    }
    .proof-line:last-child{border-bottom:0}
    .check{
      width:22px;height:22px;border-radius:8px;
      display:grid;place-items:center;
      background:rgba(67,242,223,.14);
      color:var(--brand);
      flex:0 0 auto;
      font-weight:900;
      line-height:1;
    }
    .quote-card{
      border-radius:24px;
      padding:24px;
      background:linear-gradient(135deg, rgba(67,242,223,.08), rgba(185,150,255,.07));
      border:1px solid rgba(255,255,255,.08);
      margin-top:18px;
    }
    .quote-card p{font-size:16px;color:#dce9ef}
    .quote-card small{color:var(--muted)}

    .faq-wrap{
      padding:18px;
      margin-top:34px;
    }
    .accordion{
      --bs-accordion-bg:transparent;
      --bs-accordion-border-color:transparent;
      --bs-accordion-btn-focus-box-shadow:none;
      --bs-accordion-active-bg:rgba(67,242,223,.08);
      --bs-accordion-active-color:#fff;
      display:grid;
      gap:12px;
    }
    .accordion-item{
      color:var(--text);
      background:rgba(255,255,255,.04);
      border:1px solid var(--line)!important;
      border-radius:18px!important;
      overflow:hidden;
    }
    .accordion-button{
      color:var(--text);
      background:transparent;
      padding:18px 20px;
      font-weight:800;
      border-radius:18px!important;
      box-shadow:none!important;
    }
    .accordion-button:not(.collapsed){
      color:#fff;
      background:rgba(67,242,223,.075);
    }
    .accordion-button::after{
      filter:invert(1) grayscale(1);
      opacity:.7;
    }
    .accordion-body{
      color:var(--muted);
      padding:0 20px 20px;
    }

    .cta-box{
      padding:34px;
      display:grid;
      grid-template-columns:1fr auto;
      gap:24px;
      align-items:center;
      overflow:hidden;
      position:relative;
    }
    .cta-box::before{
      content:"";
      position:absolute;
      right:10%;
      bottom:-80px;
      width:260px;height:260px;border-radius:50%;
      background:radial-gradient(circle, rgba(67,242,223,.16), transparent 70%);
    }
    .cta-box h2{
      font-size:clamp(26px,3.8vw,42px);
      line-height:1.18;
      font-weight:900;
      margin:0 0 10px;
      position:relative;
    }
    .cta-box p{
      color:var(--muted);
      margin:0;
      position:relative;
    }
    .cta-actions{
      display:flex;
      gap:12px;
      flex-wrap:wrap;
      position:relative;
    }

    .site-footer{
      padding:58px 0 94px;
      border-top:1px solid var(--line);
      background:rgba(3,8,13,.45);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.4fr .8fr .8fr 1fr;
      gap:28px;
    }
    .footer-brand{
      display:flex;
      align-items:center;
      gap:10px;
      font-weight:900;
      margin-bottom:14px;
    }
    .footer-text{
      color:var(--muted);
      margin:0;
      max-width:390px;
      font-size:14px;
    }
    .footer-col h3{
      font-size:15px;
      font-weight:900;
      margin:0 0 14px;
      color:#fff;
    }
    .footer-links{
      display:grid;
      gap:9px;
      padding:0;margin:0;
      list-style:none;
    }
    .footer-links a,.footer-links span{
      color:var(--muted);
      font-size:14px;
    }
    .footer-links a:hover{color:var(--brand)}
    .copyright{
      margin-top:34px;
      padding-top:22px;
      border-top:1px solid rgba(255,255,255,.07);
      color:var(--muted-2);
      font-size:13px;
      display:flex;
      justify-content:space-between;
      gap:12px;
      flex-wrap:wrap;
    }

    .bottom-bar{
      position:fixed;
      left:50%;
      bottom:18px;
      transform:translateX(-50%);
      width:min(980px, calc(100% - 36px));
      z-index:999;
      border:1px solid var(--line-strong);
      background:rgba(6,16,24,.82);
      backdrop-filter:blur(18px);
      border-radius:999px;
      box-shadow:0 20px 54px rgba(0,0,0,.34), 0 0 34px rgba(67,242,223,.09);
      padding:10px;
    }
    .bottom-inner{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
    }
    .bottom-tip{
      color:var(--muted);
      padding-left:14px;
      font-size:14px;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .bottom-actions{
      display:flex;
      gap:8px;
      flex:0 0 auto;
    }
    .bottom-actions .btn{padding:10px 15px;font-size:14px}

    @media (max-width:1199.98px){
      :root{--container:1040px}
      .nav-search{width:190px}
      .hero-grid{gap:32px;grid-template-columns:1fr .9fr}
      .player-card{left:0}
      .float-card{right:0}
      .steps{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:991.98px){
      .site-header{height:auto;min-height:72px}
      .navbar .site-container{flex-wrap:wrap;padding-block:14px}
      .nav-wrap{
        width:100%;
        flex-direction:column;
        align-items:stretch;
        gap:14px;
        padding-top:12px;
      }
      .navbar-nav{align-items:stretch}
      .nav-link{display:block;text-align:center}
      .nav-actions{flex-wrap:wrap}
      .nav-search{width:100%;order:3}
      .nav-actions .btn{flex:1}
      .hero{padding-top:64px}
      .hero-grid,.feature-layout,.scene-grid,.category-showcase,.proof-grid{
        grid-template-columns:1fr;
      }
      .visual-shell{min-height:500px}
      .trust-grid{grid-template-columns:repeat(2,1fr)}
      .feature-main{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
      .cta-box{grid-template-columns:1fr}
    }
    @media (max-width:767.98px){
      .site-container{width:min(100% - 28px, var(--container))}
      .section{padding:68px 0}
      .hero{padding:48px 0 54px}
      .hero-actions .btn{flex:1;min-width:140px}
      .visual-shell{min-height:auto}
      .player-card,.float-card,.orbit-card{
        position:relative;
        inset:auto;
        width:100%;
        max-width:none;
        margin-top:14px;
      }
      .panel-row,.preview-grid,.steps,.trust-grid{grid-template-columns:1fr}
      .preview-large,.preview-small{min-height:190px}
      .category-showcase{gap:16px}
      .footer-grid{grid-template-columns:1fr}
      .copyright{display:block}
      .bottom-bar{
        border-radius:24px;
        bottom:12px;
        width:calc(100% - 24px);
      }
      .bottom-inner{align-items:stretch;flex-direction:column}
      .bottom-tip{padding-left:6px;white-space:normal}
      .bottom-actions{display:grid;grid-template-columns:1fr 1fr}
    }
    @media (max-width:575.98px){
      body::before{background-size:34px 34px;opacity:.22}
      .brand-text{font-size:15px;max-width:230px;overflow:hidden;text-overflow:ellipsis}
      .hero h1{font-size:38px}
      .hero-lead{font-size:16px}
      .feature-main,.feature-side-card,.scene-panel,.category-card,.proof-card,.cta-box{padding:22px}
      .section-title{font-size:30px}
      .nav-actions{display:grid;grid-template-columns:1fr 1fr;width:100%}
      .nav-search{grid-column:1 / -1}
      .hero-actions{display:grid;grid-template-columns:1fr}
      .hero-badges{overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px}
      .badge-soft,.tag{font-size:12px}
    }

/* roulang page: category1 */
:root {
      --bg-deep: #070a12;
      --bg-graphite: #11151f;
      --bg-panel: rgba(20, 26, 38, .72);
      --bg-panel-strong: rgba(26, 33, 48, .88);
      --text-main: #f3f7fb;
      --text-soft: #b9c2d2;
      --text-muted: #7f8ba0;
      --line: rgba(174, 221, 255, .16);
      --line-strong: rgba(76, 238, 223, .34);
      --cyan: #4ceedd;
      --cyan-2: #35b9ff;
      --purple: #9a7cff;
      --warning: #ffd166;
      --radius-lg: 24px;
      --radius-md: 18px;
      --radius-sm: 12px;
      --shadow-soft: 0 22px 70px rgba(0, 0, 0, .34);
      --shadow-glow: 0 0 0 1px rgba(76, 238, 221, .18), 0 16px 44px rgba(76, 238, 221, .11);
      --container: 1180px;
      --header-h: 78px;
      --ease: all .24s ease;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      min-height: 100vh;
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color: var(--text-main);
      background:
        radial-gradient(circle at 18% 7%, rgba(76, 238, 221, .13), transparent 28%),
        radial-gradient(circle at 85% 18%, rgba(154, 124, 255, .16), transparent 28%),
        linear-gradient(135deg, var(--bg-deep) 0%, #0c1019 42%, #151821 100%);
      line-height: 1.7;
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      opacity: .36;
      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: 44px 44px;
      mask-image: linear-gradient(to bottom, rgba(0,0,0,.72), transparent 82%);
      z-index: -2;
    }

    body::after {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      opacity: .12;
      background-image: radial-gradient(rgba(255,255,255,.35) .6px, transparent .6px);
      background-size: 5px 5px;
      z-index: -1;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--ease);
    }

    a:hover {
      color: var(--cyan);
    }

    img, svg {
      max-width: 100%;
      display: block;
    }

    button, input, select {
      font: inherit;
    }

    input, select {
      color: var(--text-main);
    }

    ::selection {
      background: rgba(76, 238, 221, .32);
      color: #fff;
    }

    .site-container {
      width: min(calc(100% - 40px), var(--container));
      margin-inline: auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      backdrop-filter: blur(18px);
      background: rgba(7, 10, 18, .78);
      border-bottom: 1px solid var(--line);
      box-shadow: 0 14px 40px rgba(0, 0, 0, .18);
    }

    .navbar {
      min-height: var(--header-h);
      padding: 0;
    }

    .navbar .site-container {
      display: flex;
      align-items: center;
      gap: 18px;
    }

    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      min-width: max-content;
      font-weight: 800;
      letter-spacing: -.02em;
      color: var(--text-main);
    }

    .logo-mark {
      width: 38px;
      height: 38px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 14px;
      color: #061016;
      font-weight: 900;
      background: linear-gradient(135deg, var(--cyan), var(--cyan-2) 60%, var(--purple));
      box-shadow: 0 12px 30px rgba(76, 238, 221, .23);
    }

    .brand-text {
      font-size: 17px;
      white-space: nowrap;
    }

    .nav-wrap {
      align-items: center;
      gap: 18px;
    }

    .navbar-nav {
      gap: 8px;
      align-items: center;
    }

    .navbar .nav-link {
      color: var(--text-soft);
      padding: 10px 14px !important;
      border-radius: 999px;
      font-weight: 600;
      font-size: 14px;
      position: relative;
    }

    .navbar .nav-link:hover,
    .navbar .nav-link:focus {
      color: var(--text-main);
      background: rgba(255, 255, 255, .06);
    }

    .navbar .nav-link.active {
      color: #071018;
      background: linear-gradient(135deg, var(--cyan), #d7fff9);
      box-shadow: 0 8px 24px rgba(76, 238, 221, .18);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-left: auto;
    }

    .nav-search {
      display: flex;
      align-items: center;
      gap: 8px;
      width: 210px;
      padding: 8px 12px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: rgba(255, 255, 255, .055);
      transition: var(--ease);
    }

    .nav-search:focus-within {
      border-color: var(--line-strong);
      box-shadow: 0 0 0 4px rgba(76, 238, 221, .08);
      background: rgba(255, 255, 255, .075);
    }

    .search-dot {
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--cyan);
      box-shadow: 0 0 12px rgba(76, 238, 221, .75);
      flex: 0 0 auto;
    }

    .nav-search input {
      width: 100%;
      border: 0;
      outline: 0;
      background: transparent;
      color: var(--text-main);
      font-size: 13px;
    }

    .nav-search input::placeholder {
      color: var(--text-muted);
    }

    .navbar-toggler {
      border: 1px solid var(--line);
      border-radius: 14px;
      padding: 9px 10px;
      background: rgba(255,255,255,.06);
    }

    .navbar-toggler:focus {
      box-shadow: 0 0 0 4px rgba(76, 238, 221, .12);
    }

    .navbar-toggler-icon {
      filter: invert(1) grayscale(1) brightness(1.8);
    }

    .btn {
      border-radius: 999px;
      padding: 10px 18px;
      font-weight: 700;
      border: 1px solid transparent;
      transition: var(--ease);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      white-space: nowrap;
    }

    .btn-primary-glow {
      color: #061016;
      background: linear-gradient(135deg, var(--cyan), var(--cyan-2));
      box-shadow: 0 14px 36px rgba(76, 238, 221, .2);
    }

    .btn-primary-glow:hover,
    .btn-primary-glow:focus {
      color: #061016;
      transform: translateY(-2px);
      box-shadow: 0 18px 48px rgba(76, 238, 221, .32);
    }

    .btn-ghost {
      color: var(--text-main);
      border-color: var(--line);
      background: rgba(255,255,255,.055);
    }

    .btn-ghost:hover,
    .btn-ghost:focus {
      color: var(--cyan);
      border-color: var(--line-strong);
      background: rgba(76, 238, 221, .08);
      transform: translateY(-1px);
    }

    .btn-soft {
      color: var(--text-main);
      background: rgba(154, 124, 255, .12);
      border-color: rgba(154, 124, 255, .24);
    }

    .btn-soft:hover {
      color: #fff;
      border-color: rgba(154, 124, 255, .45);
      transform: translateY(-1px);
    }

    .page-shell {
      padding: 34px 0 120px;
    }

    .compact-hero {
      position: relative;
      padding: 34px;
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background:
        linear-gradient(135deg, rgba(255,255,255,.075), rgba(255,255,255,.035)),
        radial-gradient(circle at 84% 22%, rgba(76, 238, 221, .16), transparent 30%);
      box-shadow: var(--shadow-soft);
      overflow: hidden;
    }

    .compact-hero::after {
      content: "";
      position: absolute;
      width: 260px;
      height: 260px;
      right: -90px;
      bottom: -130px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(154, 124, 255, .22), transparent 70%);
    }

    .crumbs {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--text-muted);
      font-size: 13px;
      margin-bottom: 16px;
    }

    .crumbs a {
      color: var(--text-soft);
    }

    .crumbs span:last-child {
      color: var(--cyan);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.18fr) minmax(320px, .82fr);
      gap: 28px;
      align-items: center;
      position: relative;
      z-index: 1;
    }

    h1 {
      margin: 0;
      font-size: clamp(32px, 5vw, 58px);
      line-height: 1.08;
      font-weight: 900;
      letter-spacing: -.055em;
    }

    .hero-lead {
      max-width: 720px;
      margin: 18px 0 0;
      color: var(--text-soft);
      font-size: 17px;
    }

    .hero-actions {
      margin-top: 24px;
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }

    .hero-note {
      margin-top: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .badge-pill,
    .filter-chip,
    .tag {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: rgba(255,255,255,.055);
      color: var(--text-soft);
      padding: 7px 11px;
      font-size: 13px;
      font-weight: 600;
    }

    .badge-pill::before,
    .tag::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 999px;
      background: var(--cyan);
      box-shadow: 0 0 12px rgba(76,238,221,.75);
    }

    .quick-panel {
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: rgba(10, 14, 23, .62);
      padding: 18px;
      box-shadow: inset 0 1px 0 rgba(255,255,255,.08);
    }

    .panel-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding-bottom: 14px;
      border-bottom: 1px solid var(--line);
    }

    .panel-head strong {
      font-size: 16px;
    }

    .status-badge {
      color: #061016;
      background: linear-gradient(135deg, var(--cyan), #e1fffb);
      border-radius: 999px;
      padding: 5px 10px;
      font-size: 12px;
      font-weight: 800;
    }

    .panel-search {
      margin-top: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px 14px;
      border-radius: 16px;
      border: 1px solid rgba(76,238,221,.22);
      background: rgba(255,255,255,.055);
    }

    .panel-search input {
      border: 0;
      outline: 0;
      background: transparent;
      color: var(--text-main);
      width: 100%;
    }

    .mini-list {
      margin: 16px 0 0;
      padding: 0;
      list-style: none;
      display: grid;
      gap: 10px;
    }

    .mini-list li {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 12px;
      border-radius: 16px;
      background: rgba(255,255,255,.05);
      color: var(--text-soft);
    }

    .mini-list b {
      color: var(--text-main);
      font-weight: 700;
    }

    .section {
      margin-top: 82px;
    }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 24px;
    }

    .section-kicker {
      display: inline-flex;
      margin-bottom: 10px;
      color: var(--cyan);
      font-size: 13px;
      font-weight: 800;
      letter-spacing: .08em;
    }

    .section-title {
      margin: 0;
      font-size: clamp(26px, 3.2vw, 40px);
      line-height: 1.15;
      font-weight: 850;
      letter-spacing: -.035em;
    }

    .section-desc {
      margin: 10px 0 0;
      max-width: 670px;
      color: var(--text-soft);
    }

    .filter-sticky {
      position: sticky;
      top: calc(var(--header-h) + 14px);
      z-index: 20;
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: rgba(12, 16, 25, .82);
      backdrop-filter: blur(18px);
      padding: 16px;
      box-shadow: 0 16px 40px rgba(0,0,0,.2);
    }

    .filter-row {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 14px;
      align-items: center;
    }

    .chip-group {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .filter-chip {
      cursor: pointer;
      border-color: rgba(255,255,255,.12);
    }

    .filter-chip:hover,
    .filter-chip.active {
      color: #061016;
      background: linear-gradient(135deg, var(--cyan), #c8fff7);
      border-color: transparent;
      transform: translateY(-1px);
    }

    .sort-select {
      min-width: 150px;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: rgba(255,255,255,.06);
      color: var(--text-main);
      padding: 10px 14px;
      outline: 0;
    }

    .sort-select:focus {
      border-color: var(--line-strong);
      box-shadow: 0 0 0 4px rgba(76,238,221,.1);
    }

    .content-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 315px;
      gap: 22px;
      align-items: start;
    }

    .mixed-grid {
      display: grid;
      grid-template-columns: 1.18fr .82fr;
      gap: 18px;
    }

    .entry-card {
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background:
        linear-gradient(145deg, rgba(255,255,255,.075), rgba(255,255,255,.035)),
        rgba(14, 19, 29, .74);
      box-shadow: var(--shadow-soft);
      padding: 20px;
      min-height: 210px;
      transition: var(--ease);
      position: relative;
      overflow: hidden;
    }

    .entry-card:hover {
      transform: translateY(-6px);
      border-color: rgba(76,238,221,.34);
      box-shadow: var(--shadow-glow);
    }

    .entry-card.featured {
      min-height: 438px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .entry-card.featured::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        radial-gradient(circle at 20% 15%, rgba(76,238,221,.17), transparent 28%),
        radial-gradient(circle at 80% 78%, rgba(154,124,255,.14), transparent 32%);
      pointer-events: none;
    }

    .entry-content {
      position: relative;
      z-index: 1;
    }

    .cover-box {
      height: 150px;
      border-radius: 20px;
      border: 1px solid rgba(255,255,255,.1);
      background:
        linear-gradient(135deg, rgba(76,238,221,.12), rgba(154,124,255,.12)),
        repeating-linear-gradient(90deg, rgba(255,255,255,.06) 0 1px, transparent 1px 18px);
      overflow: hidden;
      position: relative;
      margin-bottom: 18px;
    }

    .cover-box::after {
      content: "";
      position: absolute;
      left: 18px;
      right: 18px;
      bottom: 18px;
      height: 44px;
      border-radius: 14px;
      background: rgba(6, 10, 18, .58);
      border: 1px solid rgba(255,255,255,.12);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.08);
    }

    .entry-card h3 {
      margin: 0 0 10px;
      font-size: 22px;
      font-weight: 830;
      line-height: 1.25;
      transition: var(--ease);
    }

    .entry-card:hover h3 {
      color: var(--cyan);
    }

    .entry-card p {
      margin: 0;
      color: var(--text-soft);
      font-size: 15px;
    }

    .tag-row {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 18px;
    }

    .tag {
      padding: 6px 10px;
      font-size: 12px;
    }

    .meta-line {
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px solid var(--line);
      display: flex;
      justify-content: space-between;
      gap: 10px;
      color: var(--text-muted);
      font-size: 13px;
    }

    .stack-list {
      display: grid;
      gap: 18px;
    }

    .side-panel {
      position: sticky;
      top: calc(var(--header-h) + 104px);
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: rgba(12, 16, 25, .7);
      padding: 18px;
      box-shadow: var(--shadow-soft);
    }

    .side-panel h3 {
      margin: 0 0 14px;
      font-size: 18px;
      font-weight: 800;
    }

    .side-links {
      display: grid;
      gap: 10px;
      padding: 0;
      margin: 0;
      list-style: none;
    }

    .side-links a,
    .side-links span {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      padding: 12px;
      border-radius: 15px;
      background: rgba(255,255,255,.05);
      color: var(--text-soft);
      border: 1px solid transparent;
    }

    .side-links a:hover {
      color: var(--cyan);
      border-color: rgba(76,238,221,.24);
      background: rgba(76,238,221,.075);
    }

    .flow-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 18px;
    }

    .flow-card {
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      padding: 22px;
      background: rgba(255,255,255,.045);
      transition: var(--ease);
    }

    .flow-card:hover {
      transform: translateY(-5px);
      border-color: rgba(76,238,221,.3);
      background: rgba(255,255,255,.065);
    }

    .flow-num {
      width: 42px;
      height: 42px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 15px;
      color: #061016;
      font-weight: 900;
      background: linear-gradient(135deg, var(--cyan), var(--cyan-2));
      margin-bottom: 18px;
      box-shadow: 0 14px 30px rgba(76,238,221,.18);
    }

    .flow-card h3 {
      margin: 0 0 8px;
      font-size: 20px;
      font-weight: 820;
    }

    .flow-card p {
      margin: 0;
      color: var(--text-soft);
    }

    .recommend-wrap {
      border: 1px solid var(--line);
      border-radius: 28px;
      background:
        linear-gradient(135deg, rgba(76,238,221,.08), rgba(154,124,255,.07)),
        rgba(255,255,255,.035);
      padding: 24px;
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 22px;
      align-items: center;
    }

    .signal-board {
      min-height: 260px;
      border-radius: 24px;
      border: 1px solid rgba(255,255,255,.12);
      background:
        radial-gradient(circle at 30% 30%, rgba(76,238,221,.18), transparent 34%),
        linear-gradient(145deg, rgba(255,255,255,.08), rgba(255,255,255,.03));
      padding: 18px;
      display: grid;
      gap: 12px;
    }

    .signal-bar {
      height: 18px;
      border-radius: 999px;
      background: rgba(255,255,255,.07);
      overflow: hidden;
    }

    .signal-bar span {
      display: block;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--cyan), var(--purple));
    }

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

    .recommend-item {
      padding: 15px;
      border-radius: 18px;
      background: rgba(8, 12, 20, .48);
      border: 1px solid var(--line);
    }

    .recommend-item strong {
      display: block;
      margin-bottom: 4px;
      font-size: 16px;
    }

    .recommend-item span {
      color: var(--text-soft);
      font-size: 14px;
    }

    .accordion {
      display: grid;
      gap: 12px;
    }

    .accordion-item {
      border: 1px solid var(--line) !important;
      border-radius: 18px !important;
      background: rgba(255,255,255,.045) !important;
      overflow: hidden;
      color: var(--text-main);
    }

    .accordion-button {
      color: var(--text-main) !important;
      background: transparent !important;
      box-shadow: none !important;
      padding: 18px 20px;
      font-weight: 800;
    }

    .accordion-button:not(.collapsed) {
      color: var(--cyan) !important;
      border-bottom: 1px solid var(--line);
    }

    .accordion-button::after {
      filter: invert(1) grayscale(1);
      opacity: .72;
    }

    .accordion-body {
      color: var(--text-soft);
      padding: 18px 20px 22px;
      background: rgba(0,0,0,.08);
    }

    .cta-panel {
      border: 1px solid rgba(76,238,221,.28);
      border-radius: 30px;
      padding: 30px;
      background:
        radial-gradient(circle at 15% 20%, rgba(76,238,221,.18), transparent 30%),
        linear-gradient(135deg, rgba(255,255,255,.075), rgba(255,255,255,.035));
      box-shadow: var(--shadow-glow);
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 24px;
      align-items: center;
    }

    .cta-panel h2 {
      margin: 0 0 8px;
      font-size: clamp(24px, 3vw, 36px);
      font-weight: 860;
      letter-spacing: -.035em;
    }

    .cta-panel p {
      margin: 0;
      color: var(--text-soft);
    }

    .cta-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .site-footer {
      border-top: 1px solid var(--line);
      background: rgba(5, 8, 14, .78);
      padding: 58px 0 28px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.45fr .75fr .75fr .95fr;
      gap: 28px;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 18px;
      font-weight: 850;
      margin-bottom: 14px;
    }

    .footer-text {
      margin: 0;
      max-width: 360px;
      color: var(--text-soft);
      font-size: 14px;
    }

    .footer-col h3 {
      margin: 0 0 14px;
      font-size: 15px;
      font-weight: 800;
      color: var(--text-main);
    }

    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      gap: 10px;
    }

    .footer-links a,
    .footer-links span {
      color: var(--text-muted);
      font-size: 14px;
    }

    .footer-links a:hover {
      color: var(--cyan);
      padding-left: 3px;
    }

    .copyright {
      margin-top: 34px;
      padding-top: 20px;
      border-top: 1px solid var(--line);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      color: var(--text-muted);
      font-size: 13px;
      flex-wrap: wrap;
    }

    .bottom-bar {
      position: fixed;
      left: 50%;
      bottom: 18px;
      transform: translateX(-50%);
      z-index: 999;
      width: min(calc(100% - 32px), 920px);
      border: 1px solid rgba(76,238,221,.24);
      border-radius: 999px;
      background: rgba(9, 13, 22, .86);
      backdrop-filter: blur(18px);
      box-shadow: 0 20px 60px rgba(0,0,0,.36);
      padding: 10px 12px 10px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
    }

    .bottom-bar span {
      color: var(--text-soft);
      font-size: 14px;
    }

    .bottom-actions {
      display: flex;
      gap: 10px;
    }

    @media (max-width: 1199px) {
      .nav-search {
        width: 180px;
      }

      .content-layout {
        grid-template-columns: minmax(0, 1fr) 280px;
      }
    }

    @media (max-width: 991px) {
      :root {
        --header-h: 70px;
      }

      .navbar {
        padding: 12px 0;
      }

      .navbar .site-container {
        flex-wrap: wrap;
      }

      .navbar-collapse {
        width: 100%;
        padding: 16px 0 4px;
      }

      .navbar-nav {
        align-items: stretch;
      }

      .nav-actions {
        margin-left: 0;
        margin-top: 12px;
        align-items: stretch;
        flex-direction: column;
      }

      .nav-search {
        width: 100%;
      }

      .hero-grid,
      .content-layout,
      .recommend-wrap,
      .cta-panel {
        grid-template-columns: 1fr;
      }

      .mixed-grid {
        grid-template-columns: 1fr;
      }

      .side-panel {
        position: static;
      }

      .flow-grid {
        grid-template-columns: 1fr 1fr;
      }

      .cta-actions {
        justify-content: flex-start;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 767px) {
      .site-container {
        width: min(calc(100% - 28px), var(--container));
      }

      .page-shell {
        padding-top: 22px;
      }

      .compact-hero {
        padding: 24px;
      }

      .section {
        margin-top: 62px;
      }

      .section-head {
        display: block;
      }

      .filter-row {
        grid-template-columns: 1fr;
      }

      .sort-select {
        width: 100%;
      }

      .entry-card.featured {
        min-height: auto;
      }

      .flow-grid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .bottom-bar {
        border-radius: 24px;
        align-items: stretch;
        flex-direction: column;
        padding: 12px;
      }

      .bottom-actions {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr 1fr;
      }

      .bottom-actions .btn {
        width: 100%;
        padding-inline: 12px;
      }
    }

    @media (max-width: 575px) {
      body::before {
        opacity: .22;
        background-size: 32px 32px;
      }

      .brand-text {
        font-size: 14px;
        max-width: 210px;
        overflow: hidden;
        text-overflow: ellipsis;
      }

      h1 {
        font-size: 32px;
      }

      .hero-actions,
      .cta-actions {
        display: grid;
        grid-template-columns: 1fr;
      }

      .hero-actions .btn,
      .cta-actions .btn {
        width: 100%;
      }

      .cover-box {
        height: 124px;
      }

      .compact-hero,
      .entry-card,
      .recommend-wrap,
      .cta-panel {
        border-radius: 22px;
      }

      .copyright {
        display: grid;
      }
    }