/* roulang page: index */
:root{
      --ink:#111314;
      --ink-2:#191c1f;
      --graphite:#24282c;
      --muted:#697078;
      --soft:#f4f1ea;
      --soft-2:#ebe7df;
      --card:#fffdf8;
      --line:rgba(17,19,20,.12);
      --line-dark:rgba(255,255,255,.14);
      --accent:#17f1bd;
      --accent-2:#b56cff;
      --accent-deep:#05b88e;
      --warning:#ffe08a;
      --white:#ffffff;
      --radius-sm:12px;
      --radius:20px;
      --radius-lg:28px;
      --shadow:0 22px 60px rgba(17,19,20,.12);
      --shadow-soft:0 12px 36px rgba(17,19,20,.08);
      --container:1220px;
      --ease:all .22s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at 12% 8%,rgba(23,241,189,.16),transparent 28%),
        radial-gradient(circle at 88% 14%,rgba(181,108,255,.15),transparent 26%),
        linear-gradient(180deg,#151719 0,#22262a 310px,var(--soft) 311px,var(--soft) 100%);
      line-height:1.75;
      text-rendering:optimizeLegibility;
      overflow-x:hidden;
    }
    body:before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      opacity:.18;
      background-image:
        linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
        linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
      background-size:34px 34px;
      z-index:-1;
    }
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    a:hover,a:focus{color:var(--ink)}
    img{max-width:100%;height:auto;display:block}
    button,input{font:inherit}
    button{cursor:pointer}
    input:focus,button:focus,a:focus{outline:3px solid rgba(23,241,189,.34);outline-offset:3px}
    .site-wrap{min-height:100vh}
    .container{
      width:min(calc(100% - 40px),var(--container));
      margin:0 auto;
    }
    .section{
      padding:88px 0;
      position:relative;
    }
    .section-tight{padding:58px 0}
    .section-title{
      margin-bottom:34px;
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:24px;
    }
    .section-title h2{
      margin:0;
      font-size:clamp(28px,4vw,48px);
      line-height:1.12;
      letter-spacing:-.04em;
      color:var(--ink);
      font-weight:850;
    }
    .section-title p{
      margin:10px 0 0;
      max-width:620px;
      color:var(--muted);
      font-size:16px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 12px;
      border:1px solid rgba(23,241,189,.34);
      color:#d9fff5;
      background:rgba(23,241,189,.09);
      border-radius:999px;
      font-size:13px;
      font-weight:700;
      letter-spacing:.02em;
    }
    .eyebrow.dark{
      color:var(--ink);
      background:rgba(23,241,189,.14);
      border-color:rgba(5,184,142,.24);
    }
    .eyebrow:before{
      content:"";
      width:7px;
      height:7px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 16px rgba(23,241,189,.85);
    }
    .site-header{
      position:sticky;
      top:0;
      z-index:30;
      padding:18px 0 10px;
      backdrop-filter:blur(14px);
    }
    .dock{
      width:min(calc(100% - 32px),1180px);
      margin:0 auto;
      min-height:72px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:10px 12px 10px 18px;
      border:1px solid rgba(255,255,255,.13);
      border-radius:999px;
      background:rgba(17,19,20,.82);
      box-shadow:0 20px 54px rgba(0,0,0,.26);
      color:var(--white);
    }
    .brand{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:0;
      font-weight:900;
      letter-spacing:-.02em;
      white-space:nowrap;
    }
    .brand-mark{
      width:38px;
      height:38px;
      border-radius:14px;
      background:
        linear-gradient(135deg,var(--accent),rgba(181,108,255,.92));
      box-shadow:0 0 26px rgba(23,241,189,.3);
      position:relative;
      flex:0 0 auto;
    }
    .brand-mark:after{
      content:"";
      position:absolute;
      inset:10px 8px;
      border-top:3px solid rgba(17,19,20,.78);
      border-bottom:3px solid rgba(17,19,20,.78);
      transform:skewX(-12deg);
    }
    .brand-text{
      max-width:285px;
      overflow:hidden;
      text-overflow:ellipsis;
      font-size:15px;
    }
    .nav-links{
      display:flex;
      align-items:center;
      gap:4px;
      margin:0;
      padding:0;
      list-style:none;
      flex:0 0 auto;
    }
    .nav-links a{
      display:inline-flex;
      align-items:center;
      min-height:44px;
      padding:0 15px;
      border-radius:999px;
      color:rgba(255,255,255,.78);
      font-size:14px;
      font-weight:750;
      position:relative;
    }
    .nav-links a:hover{
      color:var(--white);
      background:rgba(255,255,255,.08);
      transform:translateY(-1px);
    }
    .nav-links a.active{
      color:#0c1714;
      background:var(--accent);
      box-shadow:0 10px 26px rgba(23,241,189,.2);
    }
    .dock-actions{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:255px;
      justify-content:flex-end;
    }
    .search-box{
      height:44px;
      min-width:150px;
      max-width:190px;
      display:flex;
      align-items:center;
      gap:8px;
      padding:0 12px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.14);
      background:rgba(255,255,255,.06);
    }
    .search-box span{color:rgba(255,255,255,.58);font-size:14px}
    .search-box input{
      width:100%;
      border:0;
      background:transparent;
      color:#fff;
      box-shadow:none;
      height:auto;
      padding:0;
      margin:0;
      font-size:14px;
    }
    .search-box input::placeholder{color:rgba(255,255,255,.52)}
    .search-box input:focus{outline:none;box-shadow:none;border:0}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:48px;
      padding:0 20px;
      border-radius:999px;
      border:1px solid transparent;
      font-weight:850;
      line-height:1;
      transition:var(--ease);
      user-select:none;
      white-space:nowrap;
    }
    .btn-primary{
      color:#08110f;
      background:var(--accent);
      box-shadow:0 14px 32px rgba(23,241,189,.22);
    }
    .btn-primary:hover{
      color:#08110f;
      background:#46ffd0;
      transform:translateY(-3px);
      box-shadow:0 18px 42px rgba(23,241,189,.32);
    }
    .btn-primary:active{transform:translateY(-1px) scale(.99)}
    .btn-secondary{
      color:var(--white);
      background:rgba(255,255,255,.07);
      border-color:rgba(255,255,255,.18);
    }
    .btn-secondary:hover{
      color:var(--white);
      border-color:rgba(23,241,189,.52);
      background:rgba(23,241,189,.1);
      transform:translateY(-2px);
    }
    .btn-outline{
      color:var(--ink);
      border-color:rgba(17,19,20,.18);
      background:transparent;
    }
    .btn-outline:hover{
      border-color:var(--accent-deep);
      color:var(--ink);
      background:rgba(23,241,189,.12);
      transform:translateY(-2px);
    }
    .hero{
      padding:74px 0 54px;
      color:var(--white);
    }
    .hero-grid{
      display:grid;
      grid-template-columns:minmax(0,1.02fr) minmax(360px,.88fr);
      gap:56px;
      align-items:center;
    }
    .hero h1{
      margin:18px 0 18px;
      font-size:clamp(42px,6.5vw,82px);
      line-height:.98;
      letter-spacing:-.065em;
      font-weight:920;
      color:#fff;
    }
    .hero-lead{
      margin:0;
      max-width:680px;
      color:rgba(255,255,255,.74);
      font-size:18px;
      line-height:1.9;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      margin-top:30px;
    }
    .hero-badges{
      margin-top:30px;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:34px;
      padding:0 12px;
      border-radius:999px;
      background:rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.13);
      color:rgba(255,255,255,.78);
      font-size:13px;
      font-weight:750;
    }
    .badge.light{
      color:var(--ink);
      background:rgba(17,19,20,.05);
      border-color:rgba(17,19,20,.1);
    }
    .badge.hot{
      color:#091310;
      background:var(--accent);
      border-color:transparent;
    }
    .device-frame{
      position:relative;
      border-radius:34px;
      padding:14px;
      border:1px solid rgba(255,255,255,.16);
      background:linear-gradient(180deg,rgba(255,255,255,.12),rgba(255,255,255,.04));
      box-shadow:0 34px 80px rgba(0,0,0,.36);
      overflow:hidden;
    }
    .device-frame:before{
      content:"";
      position:absolute;
      width:190px;
      height:190px;
      right:-50px;
      top:-50px;
      background:rgba(23,241,189,.22);
      filter:blur(30px);
      border-radius:50%;
    }
    .screen{
      position:relative;
      z-index:1;
      min-height:456px;
      border-radius:24px;
      background:#0c0f11;
      overflow:hidden;
      border:1px solid rgba(255,255,255,.12);
    }
    .slide{
      position:absolute;
      inset:0;
      opacity:0;
      transform:translateX(16px);
      transition:opacity .48s ease,transform .48s ease;
      padding:26px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      background:
        radial-gradient(circle at 25% 16%,rgba(23,241,189,.22),transparent 28%),
        linear-gradient(145deg,#111416,#202328);
    }
    .slide.active{opacity:1;transform:translateX(0)}
    .slide-top{
      display:flex;
      justify-content:space-between;
      align-items:center;
      color:rgba(255,255,255,.7);
      font-size:13px;
      font-weight:800;
    }
    .visual-bars{
      display:grid;
      grid-template-columns:1.2fr .8fr;
      gap:14px;
      margin:26px 0;
    }
    .poster{
      min-height:210px;
      border-radius:22px;
      background:
        linear-gradient(135deg,rgba(23,241,189,.88),rgba(181,108,255,.55)),
        repeating-linear-gradient(90deg,rgba(255,255,255,.14) 0 2px,transparent 2px 12px);
      position:relative;
      overflow:hidden;
    }
    .poster:after{
      content:"";
      position:absolute;
      left:24px;
      bottom:24px;
      width:74px;
      height:74px;
      border-radius:50%;
      border:14px solid rgba(17,19,20,.55);
      border-right-color:transparent;
    }
    .meter-list{display:grid;gap:12px}
    .meter{
      border-radius:16px;
      background:rgba(255,255,255,.07);
      padding:13px;
    }
    .meter i{
      display:block;
      height:8px;
      border-radius:999px;
      background:linear-gradient(90deg,var(--accent),rgba(255,255,255,.16));
      margin-top:9px;
    }
    .slide h3{
      color:#fff;
      margin:0 0 8px;
      font-size:26px;
      line-height:1.15;
      letter-spacing:-.03em;
    }
    .slide p{margin:0;color:rgba(255,255,255,.66)}
    .slider-dots{
      position:absolute;
      z-index:3;
      left:50%;
      transform:translateX(-50%);
      bottom:20px;
      display:flex;
      gap:8px;
    }
    .slider-dot{
      width:9px;
      height:9px;
      border-radius:50%;
      border:0;
      padding:0;
      background:rgba(255,255,255,.28);
    }
    .slider-dot.active{width:24px;border-radius:999px;background:var(--accent)}
    .quick-strip{
      margin-top:42px;
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:14px;
    }
    .stat-card{
      border:1px solid rgba(255,255,255,.12);
      background:rgba(255,255,255,.06);
      border-radius:var(--radius);
      padding:18px;
      color:#fff;
    }
    .stat-card strong{
      display:block;
      font-size:28px;
      line-height:1;
      letter-spacing:-.04em;
      font-variant-numeric:tabular-nums;
    }
    .stat-card span{display:block;margin-top:8px;color:rgba(255,255,255,.64);font-size:13px}
    .panel{
      background:var(--card);
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-soft);
    }
    .feature-stage{
      display:grid;
      grid-template-columns:.92fr 1.08fr;
      gap:28px;
      align-items:stretch;
    }
    .feature-copy{
      padding:34px;
      background:var(--ink);
      color:#fff;
      border-radius:var(--radius-lg);
      position:relative;
      overflow:hidden;
    }
    .feature-copy:after{
      content:"";
      position:absolute;
      inset:auto -40px -80px auto;
      width:220px;
      height:220px;
      border-radius:50%;
      background:rgba(23,241,189,.18);
      filter:blur(18px);
    }
    .feature-copy h2{color:#fff;margin:16px 0 14px;font-size:38px;line-height:1.12;letter-spacing:-.045em}
    .feature-copy p{color:rgba(255,255,255,.72);margin:0}
    .feature-points{
      margin:28px 0 0;
      padding:0;
      list-style:none;
      display:grid;
      gap:14px;
    }
    .feature-points li{
      display:flex;
      gap:12px;
      align-items:flex-start;
      color:rgba(255,255,255,.78);
    }
    .feature-points li:before{
      content:"";
      width:10px;
      height:10px;
      margin-top:9px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 16px rgba(23,241,189,.6);
      flex:0 0 auto;
    }
    .screenshot-wide{
      padding:20px;
      min-height:430px;
      overflow:hidden;
    }
    .wide-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      padding-bottom:18px;
      border-bottom:1px solid var(--line);
    }
    .wide-head strong{font-size:18px}
    .mock-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr;
      gap:16px;
      margin-top:18px;
    }
    .mock-main,.mock-side,.mock-row{
      border-radius:22px;
      border:1px solid rgba(17,19,20,.08);
      background:#f7f4ed;
    }
    .mock-main{
      min-height:292px;
      padding:22px;
      background:
        linear-gradient(135deg,rgba(23,241,189,.3),rgba(181,108,255,.18)),
        #f5f1e8;
    }
    .play-ring{
      width:86px;
      height:86px;
      border-radius:50%;
      margin:74px auto 0;
      background:rgba(17,19,20,.88);
      position:relative;
      box-shadow:0 18px 44px rgba(17,19,20,.18);
    }
    .play-ring:after{
      content:"";
      position:absolute;
      left:35px;
      top:27px;
      border-left:22px solid var(--accent);
      border-top:15px solid transparent;
      border-bottom:15px solid transparent;
    }
    .mock-side{
      padding:16px;
      display:grid;
      gap:12px;
      background:#fffaf2;
    }
    .mock-row{
      min-height:58px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:0 14px;
    }
    .mock-row b{
      width:42%;
      height:9px;
      border-radius:999px;
      background:rgba(17,19,20,.16);
    }
    .mock-row i{
      width:32px;
      height:32px;
      border-radius:50%;
      background:rgba(23,241,189,.38);
    }
    .requirements{
      background:#fffaf2;
      border-top:1px solid var(--line);
      border-bottom:1px solid var(--line);
    }
    .req-grid{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:18px;
    }
    .req-card{
      padding:28px;
      border-radius:var(--radius-lg);
      background:var(--card);
      border:1px solid var(--line);
      transition:var(--ease);
    }
    .req-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-soft);border-color:rgba(5,184,142,.3)}
    .req-card h3{margin:0 0 16px;font-size:24px;letter-spacing:-.03em}
    .req-list{margin:0;padding:0;list-style:none;display:grid;gap:12px}
    .req-list li{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:18px;
      padding:12px 0;
      border-bottom:1px solid rgba(17,19,20,.08);
      color:var(--muted);
    }
    .req-list li:last-child{border-bottom:0}
    .req-list b{color:var(--ink);font-weight:850;white-space:nowrap}
    .category-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:20px;
    }
    .category-card{
      position:relative;
      overflow:hidden;
      min-height:310px;
      padding:30px;
      border-radius:var(--radius-lg);
      background:var(--ink);
      color:#fff;
      box-shadow:var(--shadow);
      transition:var(--ease);
    }
    .category-card:nth-child(2){
      background:linear-gradient(145deg,#25202c,#111314);
    }
    .category-card:hover{transform:translateY(-6px)}
    .category-card:before{
      content:"";
      position:absolute;
      inset:auto -60px -80px auto;
      width:250px;
      height:250px;
      border-radius:50%;
      background:rgba(23,241,189,.2);
      filter:blur(18px);
    }
    .category-card h3{position:relative;margin:18px 0 12px;color:#fff;font-size:32px;line-height:1.12;letter-spacing:-.045em}
    .category-card p{position:relative;color:rgba(255,255,255,.7);margin:0 0 24px}
    .category-meta{
      position:relative;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-bottom:26px;
    }
    .review-wall{
      display:grid;
      grid-template-columns:1.1fr .9fr 1fr;
      gap:18px;
      align-items:start;
    }
    .review-card{
      padding:22px;
      border-radius:var(--radius);
      background:var(--card);
      border:1px solid var(--line);
      box-shadow:0 10px 28px rgba(17,19,20,.06);
      transition:var(--ease);
    }
    .review-card:hover{transform:translateY(-4px);border-color:rgba(5,184,142,.28)}
    .review-card.tall{margin-top:34px}
    .review-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      margin-bottom:14px;
    }
    .avatar{
      width:42px;
      height:42px;
      border-radius:50%;
      background:linear-gradient(135deg,var(--accent),var(--accent-2));
      display:inline-flex;
      align-items:center;
      justify-content:center;
      font-weight:900;
      color:#101312;
    }
    .stars{color:#15b98f;font-weight:900;letter-spacing:.08em}
    .review-card p{margin:0;color:#3f464d}
    .review-card small{display:block;margin-top:14px;color:var(--muted);font-weight:700}
    .download-zone{
      padding:46px;
      border-radius:34px;
      background:
        radial-gradient(circle at 80% 18%,rgba(23,241,189,.2),transparent 30%),
        linear-gradient(145deg,#111314,#24282c);
      color:#fff;
      overflow:hidden;
      position:relative;
    }
    .download-zone h2{margin:14px 0 10px;color:#fff;font-size:clamp(32px,4.5vw,58px);line-height:1.05;letter-spacing:-.055em}
    .download-zone p{max-width:760px;color:rgba(255,255,255,.72);margin:0}
    .download-actions{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      margin-top:28px;
    }
    .safe-note{
      margin-top:22px;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      color:rgba(255,255,255,.7);
      font-size:14px;
    }
    .safe-note span{
      border:1px solid rgba(255,255,255,.14);
      border-radius:999px;
      padding:7px 11px;
      background:rgba(255,255,255,.06);
    }
    .faq-wrap{
      display:grid;
      grid-template-columns:.82fr 1.18fr;
      gap:30px;
      align-items:start;
    }
    .faq-intro{
      position:sticky;
      top:110px;
    }
    .faq-list{display:grid;gap:12px}
    .faq-item{
      border:1px solid var(--line);
      background:var(--card);
      border-radius:18px;
      overflow:hidden;
      box-shadow:0 8px 26px rgba(17,19,20,.04);
    }
    .faq-question{
      width:100%;
      min-height:64px;
      padding:0 20px;
      border:0;
      background:transparent;
      color:var(--ink);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      font-weight:850;
      text-align:left;
    }
    .faq-question:hover{background:rgba(23,241,189,.08)}
    .faq-question i{
      width:28px;
      height:28px;
      border-radius:50%;
      background:rgba(17,19,20,.08);
      position:relative;
      flex:0 0 auto;
    }
    .faq-question i:before,.faq-question i:after{
      content:"";
      position:absolute;
      left:8px;
      right:8px;
      top:13px;
      height:2px;
      background:var(--ink);
      border-radius:99px;
      transition:var(--ease);
    }
    .faq-question i:after{transform:rotate(90deg)}
    .faq-item.open .faq-question i:after{transform:rotate(0);opacity:0}
    .faq-answer{
      max-height:0;
      overflow:hidden;
      transition:max-height .28s ease;
    }
    .faq-answer p{
      margin:0;
      padding:0 20px 20px;
      color:var(--muted);
    }
    .site-footer{
      padding:52px 0 28px;
      background:#111314;
      color:rgba(255,255,255,.72);
      border-top:1px solid rgba(255,255,255,.08);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr .8fr 1fr;
      gap:28px;
      align-items:start;
    }
    .footer-brand{
      display:flex;
      align-items:center;
      gap:12px;
      color:#fff;
      font-weight:900;
      margin-bottom:14px;
    }
    .footer-brand .brand-mark{width:36px;height:36px}
    .footer-col h3{
      color:#fff;
      margin:0 0 14px;
      font-size:15px;
      font-weight:900;
    }
    .footer-links{margin:0;padding:0;list-style:none;display:grid;gap:10px}
    .footer-links a{color:rgba(255,255,255,.66);font-size:14px}
    .footer-links a:hover{color:var(--accent)}
    .footer-note{font-size:14px;margin:0;max-width:360px}
    .copyright{
      margin-top:34px;
      padding-top:22px;
      border-top:1px solid rgba(255,255,255,.09);
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
      font-size:13px;
      color:rgba(255,255,255,.52);
    }
    .backtop{color:rgba(255,255,255,.7)}
    .backtop:hover{color:var(--accent)}
    @media (max-width:1180px){
      .dock{border-radius:28px;align-items:flex-start;flex-wrap:wrap}
      .brand{flex:1 1 auto}
      .nav-links{order:3;width:100%;overflow-x:auto;padding:2px 0 0}
      .nav-links a{white-space:nowrap}
      .dock-actions{min-width:260px}
      .hero-grid{grid-template-columns:1fr;gap:34px}
      .device-frame{max-width:650px;margin:0 auto;width:100%}
    }
    @media (max-width:900px){
      .section{padding:68px 0}
      .quick-strip{grid-template-columns:repeat(2,1fr)}
      .feature-stage,.req-grid,.category-grid,.faq-wrap{grid-template-columns:1fr}
      .review-wall{grid-template-columns:1fr 1fr}
      .review-card.tall{margin-top:0}
      .footer-grid{grid-template-columns:1fr 1fr}
      .faq-intro{position:static}
      .mock-grid{grid-template-columns:1fr}
    }
    @media (max-width:640px){
      .container{width:min(calc(100% - 28px),var(--container))}
      .site-header{padding-top:10px}
      .dock{
        width:calc(100% - 18px);
        padding:10px;
        border-radius:22px;
      }
      .brand-text{max-width:calc(100vw - 118px);font-size:14px}
      .dock-actions{width:100%;min-width:0;display:grid;grid-template-columns:1fr;gap:9px}
      .search-box{max-width:none;width:100%;height:46px}
      .dock-actions .btn{width:100%}
      .nav-links a{min-height:42px;padding:0 13px}
      .hero{padding:42px 0 36px}
      .hero h1{font-size:42px}
      .hero-lead{font-size:16px}
      .hero-actions,.download-actions{display:grid;grid-template-columns:1fr}
      .btn{width:100%;min-height:50px}
      .screen{min-height:380px}
      .slide{padding:20px}
      .visual-bars{grid-template-columns:1fr}
      .poster{min-height:150px}
      .quick-strip,.review-wall,.footer-grid{grid-template-columns:1fr}
      .section-title{display:block}
      .feature-copy,.screenshot-wide,.download-zone,.category-card,.req-card{padding:24px}
      .feature-copy h2{font-size:32px}
      .category-card{min-height:auto}
      .copyright{display:block}
      .backtop{display:inline-block;margin-top:10px}
    }
    @media (max-width:390px){
      .brand-mark{width:34px;height:34px;border-radius:12px}
      .hero h1{font-size:38px}
      .section{padding:56px 0}
      .download-zone h2{font-size:32px}
      .stat-card strong{font-size:24px}
    }

/* roulang page: category1 */
:root{
      --ink:#101112;
      --ink-2:#191b1d;
      --graphite:#25282b;
      --muted:#6c7075;
      --soft:#f4f1eb;
      --paper:#fbf8f1;
      --paper-2:#f0ede7;
      --line:rgba(16,17,18,.12);
      --line-dark:rgba(255,255,255,.12);
      --accent:#19f2b0;
      --accent-2:#7b61ff;
      --accent-dark:#0da879;
      --white:#ffffff;
      --danger:#ff6b6b;
      --radius-sm:12px;
      --radius:18px;
      --radius-lg:26px;
      --shadow:0 18px 60px rgba(16,17,18,.12);
      --shadow-soft:0 10px 34px rgba(16,17,18,.08);
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
      --mono:"SFMono-Regular","Consolas","Liberation Mono",monospace;
      --container:1200px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:var(--font);
      color:var(--ink);
      line-height:1.72;
      background:
        radial-gradient(circle at 8% 4%, rgba(25,242,176,.14), transparent 28%),
        radial-gradient(circle at 88% 12%, rgba(123,97,255,.12), transparent 26%),
        linear-gradient(180deg,#151719 0,#242424 280px,var(--paper) 281px,var(--paper) 100%);
      overflow-x:hidden;
    }
    body:before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      z-index:-1;
      opacity:.22;
      background-image:
        linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
      background-size:44px 44px;
      mask-image:linear-gradient(180deg,#000,transparent 55%);
    }
    a{color:inherit;text-decoration:none}
    a:hover{color:inherit}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    input,button,a{outline-offset:3px}
    input:focus-visible,button:focus-visible,a:focus-visible{
      outline:2px solid rgba(25,242,176,.72);
      outline-offset:4px;
      border-radius:12px;
    }

    .container{
      width:min(calc(100% - 40px), var(--container));
      margin:0 auto;
    }
    .section{
      padding:72px 0;
    }
    .section.compact{
      padding:48px 0;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border:1px solid rgba(25,242,176,.36);
      border-radius:999px;
      background:rgba(25,242,176,.08);
      color:#dffef4;
      font-size:13px;
      letter-spacing:.02em;
      font-weight:700;
    }
    .eyebrow.dark{
      color:var(--accent-dark);
      background:rgba(25,242,176,.1);
      border-color:rgba(13,168,121,.22);
    }
    .section-title{
      margin:14px 0 12px;
      font-size:clamp(28px,4vw,46px);
      line-height:1.12;
      letter-spacing:-.04em;
      font-weight:900;
      color:var(--ink);
    }
    .section-lead{
      margin:0;
      max-width:760px;
      color:var(--muted);
      font-size:17px;
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:1000;
      padding:18px 0 10px;
      backdrop-filter:blur(12px);
    }
    .dock{
      width:min(calc(100% - 32px), 1240px);
      margin:0 auto;
      min-height:68px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:10px 12px 10px 18px;
      border:1px solid rgba(255,255,255,.14);
      border-radius:999px;
      background:rgba(17,18,20,.82);
      box-shadow:0 22px 70px rgba(0,0,0,.28);
      color:#fff;
    }
    .brand{
      display:inline-flex;
      align-items:center;
      gap:10px;
      min-width:0;
      flex:0 0 auto;
      font-weight:900;
      letter-spacing:-.02em;
      color:#fff;
      white-space:nowrap;
    }
    .brand-mark{
      width:34px;
      height:34px;
      border-radius:12px;
      display:inline-block;
      background:
        linear-gradient(135deg, var(--accent), rgba(25,242,176,.15) 54%, var(--accent-2)),
        radial-gradient(circle at 30% 24%, #fff, transparent 23%);
      box-shadow:0 0 0 6px rgba(25,242,176,.08), 0 10px 26px rgba(25,242,176,.22);
      position:relative;
      flex:0 0 auto;
    }
    .brand-mark:after{
      content:"";
      position:absolute;
      inset:9px 7px;
      border-top:2px solid rgba(16,17,18,.8);
      border-bottom:2px solid rgba(16,17,18,.8);
      transform:skewX(-12deg);
    }
    .brand-text{
      max-width:280px;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .nav-links{
      list-style:none;
      display:flex;
      align-items:center;
      justify-content:center;
      gap:6px;
      padding:0;
      margin:0;
      flex:1 1 auto;
      min-width:0;
    }
    .nav-links a{
      display:inline-flex;
      align-items:center;
      min-height:44px;
      padding:0 15px;
      border-radius:999px;
      color:rgba(255,255,255,.74);
      font-weight:700;
      font-size:14px;
      transition:.22s ease;
      white-space:nowrap;
    }
    .nav-links a:hover{
      color:#fff;
      background:rgba(255,255,255,.08);
      transform:translateY(-1px);
    }
    .nav-links a.active{
      color:var(--ink);
      background:var(--accent);
      box-shadow:0 10px 26px rgba(25,242,176,.22);
    }
    .dock-actions{
      display:flex;
      align-items:center;
      gap:10px;
      flex:0 0 auto;
    }
    .search-box{
      display:flex;
      align-items:center;
      gap:8px;
      height:44px;
      padding:0 12px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.12);
      background:rgba(255,255,255,.06);
      color:rgba(255,255,255,.66);
    }
    .search-box input{
      width:178px;
      border:0;
      background:transparent;
      box-shadow:none;
      color:#fff;
      height:40px;
      padding:0;
      margin:0;
      font-size:14px;
    }
    .search-box input::placeholder{color:rgba(255,255,255,.48)}
    .search-box input:focus{border:0;box-shadow:none;background:transparent}

    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:46px;
      padding:0 18px;
      border-radius:999px;
      border:1px solid transparent;
      font-weight:900;
      cursor:pointer;
      transition:transform .22s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease;
      line-height:1;
      white-space:nowrap;
    }
    .btn:hover{transform:translateY(-3px)}
    .btn:active{transform:translateY(-1px) scale(.98)}
    .btn-primary{
      background:var(--accent);
      color:var(--ink);
      box-shadow:0 16px 30px rgba(25,242,176,.22);
    }
    .btn-primary:hover{
      background:#3fffc3;
      color:var(--ink);
      box-shadow:0 20px 42px rgba(25,242,176,.32);
    }
    .btn-secondary{
      color:var(--ink);
      background:rgba(255,255,255,.72);
      border-color:var(--line);
    }
    .btn-secondary:hover{
      background:#fff;
      border-color:rgba(16,17,18,.24);
    }
    .btn-dark{
      background:var(--ink);
      color:#fff;
      border-color:rgba(255,255,255,.08);
      box-shadow:0 14px 34px rgba(16,17,18,.18);
    }
    .btn-dark:hover{background:#000;color:#fff}
    .btn-ghost{
      color:#fff;
      border-color:rgba(255,255,255,.18);
      background:rgba(255,255,255,.06);
    }
    .btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff}

    .hero-list{
      padding:56px 0 36px;
      color:#fff;
    }
    .breadcrumb{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      align-items:center;
      margin:18px 0 28px;
      color:rgba(255,255,255,.58);
      font-size:14px;
    }
    .breadcrumb a{color:rgba(255,255,255,.82)}
    .breadcrumb a:hover{color:var(--accent)}
    .summary-grid{
      display:grid;
      grid-template-columns:minmax(0, 1.18fr) minmax(300px,.82fr);
      gap:28px;
      align-items:stretch;
    }
    .hero-panel{
      padding:36px;
      border:1px solid rgba(255,255,255,.12);
      border-radius:var(--radius-lg);
      background:
        linear-gradient(135deg, rgba(255,255,255,.08), rgba(255,255,255,.025)),
        linear-gradient(180deg, rgba(20,21,23,.94), rgba(26,27,29,.86));
      box-shadow:var(--shadow);
      position:relative;
      overflow:hidden;
    }
    .hero-panel:after{
      content:"";
      position:absolute;
      right:-120px;
      top:-120px;
      width:260px;
      height:260px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(25,242,176,.28), transparent 68%);
      pointer-events:none;
    }
    h1{
      margin:18px 0 16px;
      max-width:860px;
      font-size:clamp(34px,5.4vw,70px);
      line-height:1.02;
      letter-spacing:-.06em;
      font-weight:950;
      color:#fff;
    }
    .hero-copy{
      max-width:780px;
      margin:0;
      font-size:18px;
      color:rgba(255,255,255,.74);
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:28px;
    }
    .quick-stats{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:12px;
      margin-top:34px;
    }
    .stat-pill{
      padding:14px;
      border-radius:18px;
      border:1px solid rgba(255,255,255,.1);
      background:rgba(255,255,255,.055);
    }
    .stat-pill strong{
      display:block;
      font-family:var(--mono);
      font-size:22px;
      color:var(--accent);
      line-height:1.1;
    }
    .stat-pill span{
      display:block;
      margin-top:5px;
      color:rgba(255,255,255,.62);
      font-size:13px;
    }
    .side-summary{
      padding:26px;
      border-radius:var(--radius-lg);
      background:var(--paper);
      color:var(--ink);
      box-shadow:var(--shadow);
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      gap:22px;
    }
    .summary-card-title{
      margin:0 0 12px;
      font-size:22px;
      font-weight:950;
      letter-spacing:-.03em;
    }
    .check-list{
      list-style:none;
      margin:0;
      padding:0;
      display:grid;
      gap:12px;
    }
    .check-list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      padding:12px;
      border:1px solid var(--line);
      border-radius:16px;
      background:#fffdf8;
      color:#45484c;
      font-size:15px;
    }
    .check-list li:before{
      content:"✓";
      width:24px;
      height:24px;
      border-radius:50%;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      flex:0 0 auto;
      background:rgba(25,242,176,.14);
      color:var(--accent-dark);
      font-weight:900;
    }

    .filter-shell{
      margin-top:-8px;
      padding:22px;
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      background:rgba(255,255,255,.72);
      box-shadow:var(--shadow-soft);
    }
    .filter-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      margin-bottom:18px;
    }
    .filter-title{
      margin:0;
      font-size:20px;
      font-weight:950;
      letter-spacing:-.03em;
    }
    .filter-search{
      width:min(100%, 360px);
      height:48px;
      display:flex;
      align-items:center;
      gap:8px;
      padding:0 14px;
      border:1px solid rgba(16,17,18,.14);
      border-radius:999px;
      background:#fff;
      color:var(--muted);
    }
    .filter-search input{
      height:44px;
      border:0;
      margin:0;
      padding:0;
      box-shadow:none;
      background:transparent;
      color:var(--ink);
    }
    .filter-search input:focus{box-shadow:none;border:0;background:transparent}
    .chip-row{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .chip{
      display:inline-flex;
      align-items:center;
      min-height:38px;
      padding:0 14px;
      border-radius:999px;
      border:1px solid rgba(16,17,18,.12);
      background:#fffdf8;
      color:#484b50;
      font-size:14px;
      font-weight:800;
      transition:.22s ease;
    }
    .chip:hover{
      transform:translateY(-2px);
      border-color:rgba(13,168,121,.36);
      color:var(--accent-dark);
      box-shadow:0 10px 24px rgba(16,17,18,.08);
    }
    .chip.active{
      background:var(--ink);
      color:#fff;
      border-color:var(--ink);
    }

    .list-layout{
      display:grid;
      grid-template-columns:280px minmax(0,1fr);
      gap:24px;
      align-items:start;
    }
    .left-panel{
      position:sticky;
      top:100px;
      padding:20px;
      border-radius:var(--radius-lg);
      border:1px solid var(--line);
      background:#fffdf8;
      box-shadow:var(--shadow-soft);
    }
    .left-panel h2{
      margin:0 0 14px;
      font-size:22px;
      font-weight:950;
      letter-spacing:-.03em;
    }
    .sort-list{
      list-style:none;
      margin:0;
      padding:0;
      display:grid;
      gap:9px;
    }
    .sort-list a{
      display:flex;
      justify-content:space-between;
      align-items:center;
      padding:12px 13px;
      border-radius:14px;
      color:#3f4246;
      font-weight:800;
      background:#f7f4ed;
      border:1px solid transparent;
      transition:.22s ease;
    }
    .sort-list a:hover,
    .sort-list a.current{
      background:rgba(25,242,176,.12);
      border-color:rgba(13,168,121,.2);
      color:var(--accent-dark);
    }
    .mini-note{
      margin-top:18px;
      padding:14px;
      border-radius:16px;
      background:var(--ink);
      color:rgba(255,255,255,.72);
      font-size:14px;
    }
    .mini-note strong{
      display:block;
      color:#fff;
      margin-bottom:4px;
    }
    .download-list{
      display:grid;
      gap:18px;
    }
    .download-card{
      display:grid;
      grid-template-columns:1fr 190px;
      gap:20px;
      align-items:center;
      padding:22px;
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      background:#fffdf8;
      box-shadow:var(--shadow-soft);
      transition:.24s ease;
      overflow:hidden;
      position:relative;
    }
    .download-card:hover{
      transform:translateY(-5px);
      border-color:rgba(13,168,121,.28);
      box-shadow:0 22px 58px rgba(16,17,18,.12);
    }
    .download-card.featured{
      background:
        linear-gradient(120deg, #fffdf8 0%, #fffdf8 64%, rgba(25,242,176,.12) 100%);
    }
    .card-main h2{
      margin:8px 0 8px;
      font-size:26px;
      line-height:1.18;
      font-weight:950;
      letter-spacing:-.04em;
    }
    .card-main p{
      margin:0;
      color:var(--muted);
      font-size:16px;
    }
    .badge-line{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      align-items:center;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      min-height:28px;
      padding:0 10px;
      border-radius:999px;
      font-size:12px;
      font-weight:900;
      color:var(--accent-dark);
      background:rgba(25,242,176,.12);
      border:1px solid rgba(13,168,121,.2);
    }
    .badge.purple{
      color:#5c45dc;
      background:rgba(123,97,255,.1);
      border-color:rgba(123,97,255,.18);
    }
    .badge.hot{
      color:#b74b39;
      background:rgba(255,107,107,.12);
      border-color:rgba(255,107,107,.2);
    }
    .metric-row{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      margin-top:16px;
    }
    .metric{
      padding:10px 12px;
      border-radius:14px;
      background:#f3f0e8;
      min-width:92px;
    }
    .metric strong{
      display:block;
      font-family:var(--mono);
      font-size:18px;
      line-height:1.1;
      color:var(--ink);
    }
    .metric span{
      display:block;
      margin-top:4px;
      font-size:12px;
      color:var(--muted);
    }
    .card-action{
      display:grid;
      gap:10px;
      justify-items:stretch;
    }
    .cover-mini{
      height:92px;
      border-radius:20px;
      background:
        linear-gradient(135deg, rgba(16,17,18,.92), rgba(16,17,18,.72)),
        repeating-linear-gradient(90deg, rgba(25,242,176,.5) 0 2px, transparent 2px 14px);
      border:1px solid rgba(16,17,18,.12);
      position:relative;
      overflow:hidden;
    }
    .cover-mini:before{
      content:"";
      position:absolute;
      inset:16px;
      border-radius:16px;
      border:1px solid rgba(255,255,255,.12);
      background:
        linear-gradient(90deg, rgba(25,242,176,.86) 0 34%, rgba(255,255,255,.18) 34% 36%, transparent 36%),
        linear-gradient(180deg, rgba(255,255,255,.08), transparent);
    }
    .cover-mini:after{
      content:"夜间版";
      position:absolute;
      left:16px;
      bottom:14px;
      color:#fff;
      font-weight:950;
      letter-spacing:.04em;
      font-size:13px;
    }

    .compare-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:22px;
      align-items:stretch;
    }
    .compare-card,
    .review-card,
    .cta-band,
    .faq-wrap{
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      background:#fffdf8;
      box-shadow:var(--shadow-soft);
    }
    .compare-card{
      padding:26px;
    }
    .compare-card h2,
    .reviews h2,
    .faq-wrap h2{
      margin:0 0 16px;
      font-size:30px;
      font-weight:950;
      letter-spacing:-.04em;
    }
    .compare-list{
      display:grid;
      gap:12px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .compare-list li{
      display:grid;
      grid-template-columns:150px 1fr;
      gap:12px;
      padding:14px 0;
      border-bottom:1px solid var(--line);
      color:#484b50;
    }
    .compare-list li:last-child{border-bottom:0}
    .compare-list strong{
      color:var(--ink);
      font-weight:950;
    }
    .score-box{
      padding:26px;
      border-radius:var(--radius-lg);
      background:var(--ink);
      color:#fff;
      overflow:hidden;
      position:relative;
    }
    .score-box:after{
      content:"";
      position:absolute;
      right:-44px;
      bottom:-60px;
      width:180px;
      height:180px;
      border-radius:50%;
      background:rgba(25,242,176,.18);
    }
    .score{
      font-family:var(--mono);
      font-size:64px;
      line-height:1;
      font-weight:900;
      color:var(--accent);
    }
    .score-box p{
      color:rgba(255,255,255,.72);
      margin:12px 0 0;
    }
    .bar{
      height:10px;
      border-radius:999px;
      background:rgba(255,255,255,.1);
      margin-top:20px;
      overflow:hidden;
    }
    .bar span{
      display:block;
      height:100%;
      width:94%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--accent),var(--accent-2));
    }

    .reviews{
      background:var(--ink);
      color:#fff;
      border-radius:32px;
      padding:38px;
      position:relative;
      overflow:hidden;
    }
    .reviews:before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 12% 18%, rgba(25,242,176,.16), transparent 25%),
        radial-gradient(circle at 86% 78%, rgba(123,97,255,.14), transparent 28%);
      pointer-events:none;
    }
    .reviews > *{position:relative}
    .reviews .section-lead{color:rgba(255,255,255,.66)}
    .review-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:16px;
      margin-top:24px;
    }
    .review-card{
      padding:20px;
      background:rgba(255,255,255,.07);
      border-color:rgba(255,255,255,.12);
      color:#fff;
      box-shadow:none;
    }
    .review-head{
      display:flex;
      align-items:center;
      gap:12px;
      margin-bottom:14px;
    }
    .avatar{
      width:42px;
      height:42px;
      border-radius:50%;
      background:linear-gradient(135deg,var(--accent),var(--accent-2));
      box-shadow:0 0 0 5px rgba(255,255,255,.06);
    }
    .review-head strong{display:block}
    .review-head span{font-size:13px;color:rgba(255,255,255,.54)}
    .review-card p{margin:0;color:rgba(255,255,255,.72)}
    .stars{color:var(--accent);letter-spacing:1px;font-size:13px;margin-top:12px}

    .download-zone{
      padding:0 0 78px;
    }
    .cta-band{
      padding:34px;
      display:grid;
      grid-template-columns:1fr auto;
      gap:24px;
      align-items:center;
      background:
        linear-gradient(135deg, #fffdf8, #f6f2e9 58%, rgba(25,242,176,.13));
    }
    .cta-band h2{
      margin:0 0 8px;
      font-size:34px;
      font-weight:950;
      letter-spacing:-.04em;
      line-height:1.14;
    }
    .cta-band p{
      margin:0;
      color:var(--muted);
      max-width:720px;
    }
    .cta-actions{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }

    .faq-wrap{
      padding:28px;
    }
    .accordion{
      margin:0;
      background:transparent;
    }
    .accordion-item{
      margin-bottom:10px;
      border:1px solid var(--line);
      border-radius:18px;
      overflow:hidden;
      background:#fff;
    }
    .accordion-title{
      border:0 !important;
      color:var(--ink);
      font-weight:950;
      font-size:16px;
      padding:18px 48px 18px 18px;
      background:#fff;
      transition:.22s ease;
    }
    .accordion-title:hover,
    .accordion-title:focus{
      background:#f7f4ed;
      color:var(--ink);
    }
    .accordion-title:before{
      right:18px;
      color:var(--accent-dark);
      font-weight:900;
    }
    .accordion-content{
      border:0 !important;
      border-top:1px solid var(--line) !important;
      color:var(--muted);
      padding:18px;
      background:#fffdf8;
    }

    .site-footer{
      background:#111214;
      color:#fff;
      padding:58px 0 24px;
      border-top:1px solid rgba(255,255,255,.08);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.4fr .7fr .7fr .7fr;
      gap:28px;
      align-items:start;
    }
    .footer-brand{
      display:flex;
      align-items:center;
      gap:10px;
      font-weight:950;
      letter-spacing:-.02em;
      margin-bottom:14px;
    }
    .footer-note{
      margin:0;
      max-width:430px;
      color:rgba(255,255,255,.62);
      font-size:14px;
    }
    .footer-col h3{
      margin:0 0 12px;
      font-size:15px;
      color:#fff;
      font-weight:950;
    }
    .footer-links{
      list-style:none;
      margin:0;
      padding:0;
      display:grid;
      gap:9px;
    }
    .footer-links a{
      color:rgba(255,255,255,.58);
      font-size:14px;
      transition:.2s ease;
    }
    .footer-links a:hover{
      color:var(--accent);
    }
    .copyright{
      margin-top:34px;
      padding-top:22px;
      border-top:1px solid rgba(255,255,255,.08);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      color:rgba(255,255,255,.48);
      font-size:13px;
    }
    .backtop{
      color:rgba(255,255,255,.72);
      padding:8px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.06);
    }
    .backtop:hover{
      color:var(--ink);
      background:var(--accent);
    }

    @media (max-width:1180px){
      .dock{
        align-items:flex-start;
        border-radius:28px;
        flex-wrap:wrap;
      }
      .nav-links{
        order:3;
        width:100%;
        justify-content:flex-start;
        overflow-x:auto;
        padding-top:2px;
      }
      .dock-actions{margin-left:auto}
      .search-box input{width:150px}
      .list-layout{grid-template-columns:240px minmax(0,1fr)}
    }
    @media (max-width:1024px){
      .summary-grid,
      .compare-grid,
      .cta-band{
        grid-template-columns:1fr;
      }
      .list-layout{
        grid-template-columns:1fr;
      }
      .left-panel{
        position:static;
      }
      .sort-list{
        grid-template-columns:repeat(3,1fr);
      }
      .review-grid{
        grid-template-columns:1fr 1fr;
      }
      .footer-grid{
        grid-template-columns:1fr 1fr;
      }
    }
    @media (max-width:768px){
      .container{width:min(calc(100% - 28px), var(--container))}
      .section{padding:52px 0}
      .site-header{padding:10px 0}
      .dock{
        width:calc(100% - 20px);
        padding:10px;
        gap:10px;
      }
      .brand-text{max-width:210px}
      .dock-actions{
        width:100%;
        display:grid;
        grid-template-columns:1fr auto;
      }
      .search-box{
        min-width:0;
        width:100%;
      }
      .search-box input{width:100%}
      .nav-links a{
        min-height:42px;
        padding:0 13px;
      }
      .hero-panel{
        padding:26px;
      }
      .quick-stats{
        grid-template-columns:1fr;
      }
      .filter-top{
        align-items:stretch;
        flex-direction:column;
      }
      .filter-search{width:100%}
      .download-card{
        grid-template-columns:1fr;
      }
      .card-action{
        grid-template-columns:1fr 1fr;
      }
      .cover-mini{
        grid-column:1 / -1;
      }
      .sort-list{
        grid-template-columns:1fr;
      }
      .review-grid{
        grid-template-columns:1fr;
      }
      .compare-list li{
        grid-template-columns:1fr;
        gap:4px;
      }
      .cta-actions{
        justify-content:stretch;
      }
      .cta-actions .btn{
        width:100%;
      }
      .footer-grid{
        grid-template-columns:1fr;
      }
      .copyright{
        align-items:flex-start;
        flex-direction:column;
      }
    }
    @media (max-width:520px){
      body{
        background:
          radial-gradient(circle at 0 0, rgba(25,242,176,.14), transparent 30%),
          linear-gradient(180deg,#151719 0,#242424 340px,var(--paper) 341px,var(--paper) 100%);
      }
      .brand-mark{width:30px;height:30px;border-radius:10px}
      .brand-text{max-width:170px;font-size:13px}
      .dock-actions{
        grid-template-columns:1fr;
      }
      .dock-actions .btn{
        width:100%;
      }
      h1{font-size:36px}
      .hero-copy{font-size:16px}
      .hero-actions .btn{
        width:100%;
      }
      .side-summary,
      .filter-shell,
      .left-panel,
      .download-card,
      .reviews,
      .cta-band,
      .faq-wrap{
        border-radius:22px;
      }
      .card-action{
        grid-template-columns:1fr;
      }
      .metric-row{
        display:grid;
        grid-template-columns:1fr 1fr;
      }
      .section-title{font-size:30px}
      .cta-band h2{font-size:28px}
    }

/* roulang page: category2 */
:root{
      --ink:#0b0c0f;
      --ink-2:#15171c;
      --graphite:#202229;
      --paper:#f7f3ea;
      --paper-2:#ebe5d8;
      --mist:#d8d2c6;
      --muted:#716d66;
      --text:#171717;
      --soft-text:#57534c;
      --line:rgba(18,18,18,.12);
      --line-dark:rgba(255,255,255,.12);
      --accent:#33f2b2;
      --accent-2:#9d7bff;
      --accent-soft:rgba(51,242,178,.12);
      --warm:#fffaf0;
      --danger:#ff6b6b;
      --radius-sm:12px;
      --radius:18px;
      --radius-lg:26px;
      --shadow-sm:0 8px 24px rgba(0,0,0,.08);
      --shadow:0 18px 50px rgba(0,0,0,.14);
      --shadow-glow:0 16px 42px rgba(51,242,178,.18);
      --container:1240px;
      --ease:all .22s ease;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      line-height:1.72;
      background:
        radial-gradient(circle at 12% 4%, rgba(51,242,178,.13), transparent 28%),
        radial-gradient(circle at 82% 0%, rgba(157,123,255,.12), transparent 30%),
        linear-gradient(180deg,#17181d 0,#111216 300px,var(--paper) 301px,var(--paper) 100%);
      overflow-x:hidden;
    }
    body:before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      opacity:.16;
      background-image:
        linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
      background-size:42px 42px;
      mask-image:linear-gradient(to bottom,#000 0,transparent 62%);
      z-index:0;
    }
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    a:hover,a:focus{color:inherit}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    input{min-width:0}
    ::selection{background:var(--accent);color:#07100d}
    .container{
      width:min(calc(100% - 40px),var(--container));
      margin-inline:auto;
      position:relative;
      z-index:1;
    }
    .section{
      padding:84px 0;
      position:relative;
      z-index:1;
    }
    .section-tight{padding:54px 0}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-bottom:18px;
      padding:7px 12px;
      border:1px solid rgba(51,242,178,.28);
      border-radius:999px;
      color:#0f3f31;
      background:rgba(51,242,178,.12);
      font-size:13px;
      font-weight:800;
      letter-spacing:.04em;
    }
    .eyebrow.dark{
      color:var(--accent);
      background:rgba(51,242,178,.08);
      border-color:rgba(51,242,178,.26);
    }
    h1,h2,h3,h4,p{margin-top:0}
    h1,h2,h3{
      color:inherit;
      letter-spacing:-.045em;
      line-height:1.08;
      font-weight:900;
    }
    h1{font-size:clamp(38px,6.4vw,78px);margin-bottom:24px}
    h2{font-size:clamp(30px,4vw,52px);margin-bottom:18px}
    h3{font-size:clamp(20px,2.1vw,28px);margin-bottom:12px}
    p{color:var(--soft-text)}
    .lead{
      font-size:clamp(16px,1.7vw,20px);
      color:rgba(255,255,255,.74);
      max-width:760px;
    }
    .section-head{
      display:flex;
      justify-content:space-between;
      align-items:flex-end;
      gap:28px;
      margin-bottom:34px;
    }
    .section-head p{max-width:620px;margin-bottom:0}
    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      padding:18px 0 10px;
    }
    .dock{
      width:min(calc(100% - 36px),1240px);
      margin:auto;
      min-height:74px;
      display:flex;
      align-items:center;
      gap:20px;
      padding:12px;
      border:1px solid rgba(255,255,255,.16);
      border-radius:999px;
      background:rgba(16,17,21,.78);
      box-shadow:0 20px 60px rgba(0,0,0,.24);
      backdrop-filter:blur(18px);
    }
    .brand{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:245px;
      padding:8px 10px;
      border-radius:999px;
      color:#fff;
      font-weight:900;
      letter-spacing:-.03em;
    }
    .brand:hover{background:rgba(255,255,255,.06);color:#fff}
    .brand-mark{
      width:32px;
      height:32px;
      display:inline-block;
      flex:0 0 auto;
      border-radius:11px;
      background:
        linear-gradient(135deg,var(--accent),rgba(51,242,178,.2) 42%,var(--accent-2)),
        linear-gradient(180deg,#fff,transparent);
      box-shadow:0 0 0 5px rgba(51,242,178,.08),0 12px 28px rgba(51,242,178,.25);
      position:relative;
    }
    .brand-mark:after{
      content:"";
      position:absolute;
      inset:8px;
      border-radius:8px;
      border:2px solid rgba(8,10,12,.75);
    }
    .brand-text{
      display:inline-block;
      max-width:250px;
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
      font-size:15px;
    }
    .nav-links{
      list-style:none;
      margin:0;
      padding:0;
      display:flex;
      align-items:center;
      gap:6px;
      flex:1;
      justify-content:center;
    }
    .nav-links a{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:42px;
      padding:0 16px;
      border-radius:999px;
      color:rgba(255,255,255,.72);
      font-size:14px;
      font-weight:800;
      position:relative;
    }
    .nav-links a:hover,
    .nav-links a:focus{
      color:#fff;
      background:rgba(255,255,255,.08);
      outline:none;
    }
    .nav-links a.active{
      color:#07100d;
      background:var(--accent);
      box-shadow:0 10px 30px rgba(51,242,178,.22);
    }
    .dock-actions{
      display:flex;
      align-items:center;
      gap:10px;
    }
    .search-box{
      width:245px;
      height:46px;
      display:flex;
      align-items:center;
      gap:8px;
      padding:0 14px;
      border:1px solid rgba(255,255,255,.13);
      border-radius:999px;
      color:rgba(255,255,255,.66);
      background:rgba(255,255,255,.06);
    }
    .search-box input{
      width:100%;
      height:100%;
      border:0;
      color:#fff;
      background:transparent;
      box-shadow:none;
      margin:0;
      padding:0;
      font-size:13px;
    }
    .search-box input::placeholder{color:rgba(255,255,255,.45)}
    .search-box input:focus{outline:none;box-shadow:none;background:transparent}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:48px;
      padding:0 20px;
      border-radius:999px;
      border:1px solid transparent;
      cursor:pointer;
      font-weight:900;
      letter-spacing:-.01em;
      transition:var(--ease);
      white-space:nowrap;
    }
    .btn-primary{
      background:var(--accent);
      color:#06120e;
      box-shadow:0 14px 34px rgba(51,242,178,.22);
    }
    .btn-primary:hover,
    .btn-primary:focus{
      transform:translateY(-2px);
      color:#06120e;
      filter:saturate(1.05) brightness(1.02);
      box-shadow:0 20px 46px rgba(51,242,178,.32);
      outline:none;
    }
    .btn-secondary{
      background:rgba(255,255,255,.06);
      border-color:rgba(255,255,255,.18);
      color:#fff;
    }
    .btn-secondary:hover,
    .btn-secondary:focus{
      transform:translateY(-2px);
      color:#fff;
      background:rgba(255,255,255,.1);
      border-color:rgba(255,255,255,.32);
      outline:none;
    }
    .btn-dark{
      background:#111216;
      color:#fff;
      border-color:#111216;
      box-shadow:0 14px 34px rgba(0,0,0,.18);
    }
    .btn-dark:hover,.btn-dark:focus{
      transform:translateY(-2px);
      color:#fff;
      box-shadow:0 20px 44px rgba(0,0,0,.25);
      outline:none;
    }
    .btn-outline{
      background:transparent;
      color:#111216;
      border-color:rgba(17,18,22,.22);
    }
    .btn-outline:hover,.btn-outline:focus{
      transform:translateY(-2px);
      color:#111216;
      border-color:rgba(17,18,22,.5);
      background:rgba(255,255,255,.45);
      outline:none;
    }

    .hero-topic{
      color:#fff;
      padding:72px 0 60px;
      position:relative;
      z-index:1;
    }
    .breadcrumb{
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:10px;
      margin:0 0 24px;
      padding:0;
      list-style:none;
      color:rgba(255,255,255,.58);
      font-size:14px;
      font-weight:700;
    }
    .breadcrumb a{color:rgba(255,255,255,.72)}
    .breadcrumb a:hover{color:var(--accent)}
    .hero-board{
      display:grid;
      grid-template-columns:1.02fr .98fr;
      gap:44px;
      align-items:center;
    }
    .hero-copy{
      padding:30px 0;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:32px;
    }
    .hero-metrics{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:12px;
      margin-top:34px;
      max-width:720px;
    }
    .metric{
      padding:16px;
      border:1px solid rgba(255,255,255,.13);
      border-radius:20px;
      background:rgba(255,255,255,.055);
    }
    .metric strong{
      display:block;
      color:var(--accent);
      font-size:24px;
      line-height:1;
      font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;
      margin-bottom:7px;
    }
    .metric span{font-size:13px;color:rgba(255,255,255,.62);font-weight:700}
    .topic-visual{
      min-height:520px;
      position:relative;
      border-radius:34px;
      overflow:hidden;
      border:1px solid rgba(255,255,255,.15);
      background:
        linear-gradient(140deg,rgba(255,255,255,.08),rgba(255,255,255,.02)),
        radial-gradient(circle at 70% 18%,rgba(51,242,178,.22),transparent 34%),
        #121318;
      box-shadow:0 26px 80px rgba(0,0,0,.34);
    }
    .topic-visual:before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(90deg,transparent 0 18%,rgba(51,242,178,.08) 18% 18.5%,transparent 18.5% 38%,rgba(157,123,255,.08) 38% 38.5%,transparent 38.5%),
        linear-gradient(180deg,rgba(255,255,255,.08),transparent 22%,rgba(0,0,0,.38));
      opacity:.92;
    }
    .visual-panel{
      position:absolute;
      left:34px;
      right:34px;
      top:34px;
      padding:22px;
      border:1px solid rgba(255,255,255,.13);
      border-radius:24px;
      background:rgba(8,9,12,.72);
      backdrop-filter:blur(12px);
    }
    .visual-row{
      display:grid;
      grid-template-columns:84px 1fr auto;
      align-items:center;
      gap:14px;
      padding:14px 0;
      border-bottom:1px solid rgba(255,255,255,.08);
    }
    .visual-row:last-child{border-bottom:0}
    .thumb{
      height:58px;
      border-radius:16px;
      background:
        linear-gradient(135deg,rgba(51,242,178,.8),rgba(157,123,255,.78)),
        repeating-linear-gradient(90deg,rgba(255,255,255,.08) 0 6px,transparent 6px 12px);
      position:relative;
      overflow:hidden;
    }
    .thumb:after{
      content:"";
      position:absolute;
      inset:12px 20px;
      border-radius:999px;
      background:rgba(8,9,12,.55);
    }
    .visual-row h3{
      color:#fff;
      font-size:16px;
      margin:0 0 3px;
      letter-spacing:-.02em;
    }
    .visual-row p{
      margin:0;
      color:rgba(255,255,255,.54);
      font-size:13px;
    }
    .quality{
      color:#07100d;
      background:var(--accent);
      padding:6px 10px;
      border-radius:999px;
      font-size:12px;
      font-weight:900;
      font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;
    }
    .visual-card{
      position:absolute;
      left:54px;
      right:54px;
      bottom:38px;
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:12px;
    }
    .mini-stat{
      padding:18px;
      border-radius:22px;
      background:rgba(255,250,240,.92);
      color:#111216;
      box-shadow:0 20px 50px rgba(0,0,0,.22);
    }
    .mini-stat b{
      display:block;
      font-size:28px;
      line-height:1;
      margin-bottom:8px;
      font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;
    }
    .mini-stat span{font-size:13px;color:#5b554c;font-weight:800}

    .tag-cloud{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:22px;
    }
    .tag,.badge{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:34px;
      padding:0 13px;
      border-radius:999px;
      font-size:13px;
      font-weight:850;
      border:1px solid var(--line);
      background:rgba(255,255,255,.45);
      color:#27241f;
      white-space:nowrap;
    }
    .tag.hot{
      background:#111216;
      border-color:#111216;
      color:var(--accent);
    }
    .badge{
      background:var(--accent-soft);
      border-color:rgba(51,242,178,.28);
      color:#0d4635;
    }

    .feature-strip{
      margin-top:-10px;
      padding:28px;
      border-radius:30px;
      background:var(--warm);
      border:1px solid rgba(17,18,22,.1);
      box-shadow:var(--shadow-sm);
    }
    .feature-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr .8fr;
      gap:18px;
    }
    .feature-card{
      padding:26px;
      border-radius:24px;
      border:1px solid rgba(17,18,22,.1);
      background:#fffaf0;
      transition:var(--ease);
      position:relative;
      overflow:hidden;
    }
    .feature-card:hover{
      transform:translateY(-5px);
      border-color:rgba(51,242,178,.55);
      box-shadow:var(--shadow-sm);
    }
    .feature-card.large{
      background:#111216;
      color:#fff;
      min-height:320px;
    }
    .feature-card.large p{color:rgba(255,255,255,.68)}
    .feature-card.large:after{
      content:"";
      position:absolute;
      width:220px;
      height:220px;
      right:-80px;
      bottom:-80px;
      border-radius:50%;
      background:radial-gradient(circle,rgba(51,242,178,.26),transparent 68%);
    }
    .feature-icon{
      width:46px;
      height:46px;
      display:grid;
      place-items:center;
      margin-bottom:18px;
      border-radius:16px;
      background:var(--accent-soft);
      color:#083a2d;
      font-weight:900;
    }
    .feature-card.large .feature-icon{
      background:rgba(51,242,178,.13);
      color:var(--accent);
    }
    .feature-list{
      margin:22px 0 0;
      padding:0;
      list-style:none;
      display:grid;
      gap:12px;
    }
    .feature-list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:rgba(255,255,255,.76);
      font-weight:700;
    }
    .feature-list li:before{
      content:"";
      width:8px;
      height:8px;
      margin-top:10px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 6px rgba(51,242,178,.12);
      flex:0 0 auto;
    }

    .stagger{
      display:grid;
      grid-template-columns:repeat(12,1fr);
      gap:20px;
    }
    .source-card{
      border-radius:28px;
      background:#fffaf0;
      border:1px solid rgba(17,18,22,.1);
      box-shadow:0 14px 34px rgba(0,0,0,.06);
      transition:var(--ease);
      overflow:hidden;
    }
    .source-card:hover{
      transform:translateY(-5px);
      border-color:rgba(17,18,22,.22);
      box-shadow:var(--shadow);
    }
    .source-card.big{
      grid-column:span 7;
      min-height:440px;
      display:grid;
      grid-template-rows:220px auto;
    }
    .source-card.mid{
      grid-column:span 5;
      min-height:440px;
      display:flex;
      flex-direction:column;
    }
    .source-card.small{
      grid-column:span 4;
    }
    .cover{
      min-height:190px;
      background:
        radial-gradient(circle at 30% 20%,rgba(51,242,178,.56),transparent 30%),
        radial-gradient(circle at 72% 30%,rgba(157,123,255,.45),transparent 34%),
        repeating-linear-gradient(90deg,#17181d 0 16px,#111216 16px 32px);
      position:relative;
    }
    .cover:after{
      content:"";
      position:absolute;
      inset:24px;
      border:1px solid rgba(255,255,255,.14);
      border-radius:22px;
      background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(0,0,0,.18));
    }
    .source-body{padding:26px}
    .source-body p{margin-bottom:20px}
    .score-bar{
      height:9px;
      border-radius:999px;
      background:rgba(17,18,22,.08);
      overflow:hidden;
      margin:16px 0 10px;
    }
    .score-bar span{
      display:block;
      height:100%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--accent),var(--accent-2));
    }
    .meta-line{
      display:flex;
      justify-content:space-between;
      gap:14px;
      font-size:13px;
      color:var(--muted);
      font-weight:800;
    }
    .dark-insert{
      grid-column:span 8;
      padding:34px;
      border-radius:30px;
      background:#111216;
      color:#fff;
      border:1px solid rgba(255,255,255,.1);
      position:relative;
      overflow:hidden;
    }
    .dark-insert p{color:rgba(255,255,255,.66)}
    .dark-insert:after{
      content:"";
      position:absolute;
      right:-110px;
      top:-120px;
      width:320px;
      height:320px;
      border-radius:50%;
      background:radial-gradient(circle,rgba(51,242,178,.22),transparent 64%);
    }
    .check-list{
      list-style:none;
      padding:0;
      margin:22px 0 0;
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:12px;
    }
    .check-list li{
      display:flex;
      gap:10px;
      color:rgba(255,255,255,.76);
      font-weight:750;
    }
    .check-list li:before{
      content:"✓";
      display:grid;
      place-items:center;
      width:22px;
      height:22px;
      flex:0 0 auto;
      border-radius:50%;
      color:#07100d;
      background:var(--accent);
      font-size:13px;
      font-weight:900;
      margin-top:2px;
    }

    .timeline-wrap{
      display:grid;
      grid-template-columns:.82fr 1.18fr;
      gap:28px;
      align-items:start;
    }
    .compare-panel{
      padding:30px;
      border-radius:30px;
      background:#111216;
      color:#fff;
      position:sticky;
      top:112px;
      border:1px solid rgba(255,255,255,.1);
    }
    .compare-panel p{color:rgba(255,255,255,.66)}
    .compare-row{
      display:grid;
      grid-template-columns:1fr auto;
      gap:16px;
      padding:16px 0;
      border-bottom:1px solid rgba(255,255,255,.1);
    }
    .compare-row:last-child{border-bottom:0}
    .compare-row span:first-child{color:rgba(255,255,255,.72);font-weight:800}
    .compare-row span:last-child{color:var(--accent);font-weight:900}
    .timeline{
      padding:10px 0 0;
      position:relative;
    }
    .timeline:before{
      content:"";
      position:absolute;
      left:23px;
      top:18px;
      bottom:18px;
      width:2px;
      background:linear-gradient(var(--accent),rgba(17,18,22,.12));
    }
    .step{
      position:relative;
      display:grid;
      grid-template-columns:64px 1fr;
      gap:16px;
      margin-bottom:18px;
    }
    .step-no{
      width:48px;
      height:48px;
      display:grid;
      place-items:center;
      border-radius:18px;
      color:#07100d;
      background:var(--accent);
      font-weight:950;
      font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;
      box-shadow:0 12px 26px rgba(51,242,178,.22);
      z-index:1;
    }
    .step-card{
      padding:24px;
      border-radius:24px;
      background:#fffaf0;
      border:1px solid rgba(17,18,22,.1);
      transition:var(--ease);
    }
    .step-card:hover{
      transform:translateX(4px);
      border-color:rgba(51,242,178,.46);
      box-shadow:var(--shadow-sm);
    }
    .step-card p{margin-bottom:0}

    .screens{
      padding:30px;
      border-radius:32px;
      background:#111216;
      color:#fff;
      overflow:hidden;
      border:1px solid rgba(255,255,255,.1);
    }
    .screen-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:18px;
      margin-top:26px;
    }
    .screen-shot{
      min-height:360px;
      border-radius:28px;
      background:
        linear-gradient(180deg,rgba(255,255,255,.1),rgba(255,255,255,.02)),
        radial-gradient(circle at 70% 26%,rgba(51,242,178,.2),transparent 32%),
        #17181d;
      border:1px solid rgba(255,255,255,.12);
      padding:22px;
    }
    .screen-shot.compact{
      min-height:360px;
      display:grid;
      gap:14px;
    }
    .ui-line{
      height:18px;
      border-radius:999px;
      background:rgba(255,255,255,.12);
      margin-bottom:12px;
    }
    .ui-line.accent{background:var(--accent);width:46%}
    .ui-block{
      border-radius:22px;
      min-height:78px;
      background:rgba(255,255,255,.07);
      border:1px solid rgba(255,255,255,.09);
    }
    .screen-shot.compact .ui-block:nth-child(2){background:rgba(51,242,178,.11)}
    .screen-shot.compact .ui-block:nth-child(4){background:rgba(157,123,255,.12)}
    .screens p{color:rgba(255,255,255,.68)}

    .faq-area{
      display:grid;
      grid-template-columns:.82fr 1.18fr;
      gap:34px;
      align-items:start;
    }
    .accordion{
      background:transparent;
      margin:0;
    }
    .accordion-item{
      margin-bottom:12px;
      border-radius:20px;
      overflow:hidden;
      border:1px solid rgba(17,18,22,.1);
      background:#fffaf0;
      box-shadow:0 10px 26px rgba(0,0,0,.04);
    }
    .accordion-title{
      position:relative;
      display:block;
      padding:20px 58px 20px 22px;
      border:0;
      color:#111216;
      font-size:17px;
      font-weight:900;
      line-height:1.35;
      background:#fffaf0;
    }
    .accordion-title:hover,
    .accordion-title:focus{
      color:#111216;
      background:#f3eadb;
      outline:none;
    }
    .accordion-title:before{
      right:22px;
      top:50%;
      transform:translateY(-50%);
      margin-top:0;
      color:#111216;
      font-size:22px;
      font-weight:900;
    }
    .accordion-content{
      border:0;
      padding:0 22px 22px;
      background:#fffaf0;
      color:var(--soft-text);
    }
    .accordion-content p{margin-bottom:0}

    .cta-panel{
      padding:46px;
      border-radius:34px;
      background:
        radial-gradient(circle at 78% 18%,rgba(51,242,178,.26),transparent 30%),
        linear-gradient(135deg,#111216,#1b1d23);
      color:#fff;
      border:1px solid rgba(255,255,255,.12);
      box-shadow:0 26px 80px rgba(0,0,0,.25);
      display:grid;
      grid-template-columns:1fr auto;
      gap:28px;
      align-items:center;
      overflow:hidden;
    }
    .cta-panel p{color:rgba(255,255,255,.7);max-width:760px;margin-bottom:0}
    .cta-actions{
      display:flex;
      gap:12px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .download-notes{
      margin-top:16px;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .download-notes .tag{
      background:rgba(255,255,255,.08);
      border-color:rgba(255,255,255,.14);
      color:rgba(255,255,255,.78);
    }

    .site-footer{
      position:relative;
      z-index:1;
      padding:72px 0 24px;
      color:#fff;
      background:#0d0e11;
      margin-top:70px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.35fr .7fr .7fr .7fr;
      gap:34px;
      padding-bottom:36px;
      border-bottom:1px solid rgba(255,255,255,.1);
    }
    .footer-brand{
      display:flex;
      align-items:center;
      gap:10px;
      font-size:18px;
      font-weight:950;
      letter-spacing:-.03em;
      margin-bottom:16px;
    }
    .footer-note{
      max-width:420px;
      color:rgba(255,255,255,.6);
      margin:0;
      font-size:14px;
    }
    .footer-col h3{
      color:#fff;
      font-size:15px;
      letter-spacing:0;
      margin-bottom:14px;
    }
    .footer-links{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:9px;
    }
    .footer-links a{
      color:rgba(255,255,255,.58);
      font-size:14px;
      font-weight:700;
    }
    .footer-links a:hover,
    .footer-links a:focus{
      color:var(--accent);
      outline:none;
    }
    .copyright{
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:18px;
      padding-top:22px;
      color:rgba(255,255,255,.48);
      font-size:13px;
    }
    .backtop{
      color:rgba(255,255,255,.7);
      font-weight:900;
    }
    .backtop:hover{color:var(--accent)}

    @media (max-width:1180px){
      .dock{border-radius:30px;align-items:flex-start;flex-wrap:wrap}
      .brand{min-width:auto}
      .nav-links{order:3;width:100%;justify-content:flex-start;overflow-x:auto;padding:4px 2px}
      .dock-actions{margin-left:auto}
      .search-box{width:220px}
      .hero-board,.timeline-wrap,.faq-area{grid-template-columns:1fr}
      .compare-panel{position:relative;top:auto}
      .feature-grid{grid-template-columns:1fr 1fr}
      .feature-card.large{grid-column:span 2}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:768px){
      body{
        background:
          radial-gradient(circle at 16% 0%, rgba(51,242,178,.13), transparent 28%),
          linear-gradient(180deg,#17181d 0,#111216 440px,var(--paper) 441px,var(--paper) 100%);
      }
      .container{width:min(calc(100% - 28px),var(--container))}
      .site-header{padding:10px 0}
      .dock{
        width:calc(100% - 20px);
        padding:10px;
        gap:10px;
        border-radius:24px;
      }
      .brand{width:100%;justify-content:flex-start}
      .brand-text{max-width:calc(100vw - 100px)}
      .dock-actions{width:100%;display:grid;grid-template-columns:1fr}
      .search-box{width:100%}
      .dock .btn{width:100%}
      .nav-links a{min-height:40px;padding:0 12px;font-size:13px}
      .hero-topic{padding:36px 0 34px}
      .breadcrumb{font-size:13px}
      .lead{font-size:16px}
      .hero-actions .btn{width:100%}
      .hero-metrics{grid-template-columns:1fr}
      .topic-visual{min-height:560px;border-radius:26px}
      .visual-panel{left:16px;right:16px;top:16px;padding:14px;border-radius:20px}
      .visual-row{grid-template-columns:64px 1fr;gap:12px}
      .quality{grid-column:2}
      .visual-card{left:16px;right:16px;bottom:18px;grid-template-columns:1fr}
      .section{padding:58px 0}
      .section-head{display:block}
      .feature-strip{padding:16px;border-radius:24px}
      .feature-grid{grid-template-columns:1fr}
      .feature-card.large{grid-column:auto;min-height:auto}
      .stagger{display:block}
      .source-card,.source-card.big,.source-card.mid,.source-card.small,.dark-insert{
        display:block;
        width:100%;
        min-height:auto;
        margin-bottom:16px;
      }
      .check-list{grid-template-columns:1fr}
      .screen-grid{grid-template-columns:1fr}
      .screen-shot,.screen-shot.compact{min-height:260px}
      .step{grid-template-columns:50px 1fr;gap:10px}
      .step-no{width:42px;height:42px;border-radius:15px}
      .timeline:before{left:20px}
      .cta-panel{grid-template-columns:1fr;padding:28px;border-radius:28px}
      .cta-actions{justify-content:flex-start}
      .cta-actions .btn{width:100%}
      .footer-grid{grid-template-columns:1fr}
      .copyright{flex-direction:column;align-items:flex-start}
    }
    @media (max-width:520px){
      h1{font-size:36px}
      h2{font-size:29px}
      .feature-card,.source-body,.dark-insert,.compare-panel,.screens{padding:22px}
      .tag-cloud{flex-wrap:nowrap;overflow-x:auto;padding-bottom:4px}
      .tag,.badge{flex:0 0 auto}
      .accordion-title{font-size:16px}
    }