/* roulang page: index */
:root{
      --primary:#2563EB;
      --primary-dark:#1D4ED8;
      --primary-soft:#DBEAFE;
      --accent:#14B8A6;
      --accent-soft:#CCFBF1;
      --amber:#F59E0B;
      --amber-soft:#FEF3C7;
      --bg:#F8FAFC;
      --bg-2:#F9FBFF;
      --panel:#FFFFFF;
      --panel-soft:#EFF6FF;
      --text:#334155;
      --title:#0F172A;
      --muted:#64748B;
      --border:#E2E8F0;
      --border-strong:#CBD5E1;
      --footer:#0F172A;
      --footer-text:#CBD5E1;
      --radius-sm:8px;
      --radius-md:16px;
      --radius-lg:24px;
      --radius-xl:28px;
      --shadow:0 10px 30px rgba(15,23,42,.06);
      --shadow-hover:0 18px 45px rgba(15,23,42,.10);
      --container:1200px;
      --font:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:var(--font);
      color:var(--text);
      background:
        radial-gradient(circle at 12% 8%, rgba(37,99,235,.10), transparent 28%),
        radial-gradient(circle at 88% 16%, rgba(20,184,166,.11), transparent 30%),
        linear-gradient(180deg,#F8FAFC 0%,#FFFFFF 42%,#F9FBFF 100%);
      line-height:1.75;
      font-size:16px;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img,svg{display:block;max-width:100%}
    button,input{font:inherit}
    button{border:0;background:none;cursor:pointer}
    ::selection{background:var(--primary-soft);color:var(--primary-dark)}
    .container{width:min(100% - 40px,var(--container));margin-inline:auto}
    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(255,255,255,.88);
      backdrop-filter:blur(12px);
      border-bottom:1px solid rgba(226,232,240,.78);
      transition:box-shadow .25s ease, background .25s ease;
    }
    .nav{
      height:76px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:22px;
    }
    .logo{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:max-content;
      font-weight:800;
      color:var(--title);
      letter-spacing:-.02em;
    }
    .logo-mark{
      width:42px;
      height:42px;
      border-radius:14px;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      display:grid;
      place-items:center;
      box-shadow:0 12px 24px rgba(37,99,235,.20);
      position:relative;
      overflow:hidden;
    }
    .logo-mark:before{
      content:"";
      width:0;height:0;
      border-top:8px solid transparent;
      border-bottom:8px solid transparent;
      border-left:13px solid #fff;
      margin-left:3px;
      z-index:2;
    }
    .logo-mark:after{
      content:"";
      position:absolute;
      inset:8px;
      border:1px solid rgba(255,255,255,.45);
      border-radius:9px;
      background:linear-gradient(90deg,transparent 47%,rgba(255,255,255,.32) 48%,rgba(255,255,255,.32) 52%,transparent 53%);
    }
    .logo-text{display:flex;flex-direction:column;line-height:1.15}
    .logo-main{font-size:15px;white-space:nowrap}
    .logo-sub{font-size:12px;color:var(--muted);font-weight:600;margin-top:3px}
    .nav-links{
      display:flex;
      align-items:center;
      gap:6px;
      padding:6px;
      border:1px solid rgba(226,232,240,.8);
      border-radius:999px;
      background:rgba(248,250,252,.75);
    }
    .nav-links a{
      padding:9px 14px;
      border-radius:999px;
      color:var(--muted);
      font-size:14px;
      font-weight:700;
      transition:background .2s ease,color .2s ease;
    }
    .nav-links a:hover{background:#EEF6FF;color:var(--primary)}
    .nav-links a.active{background:var(--primary-soft);color:var(--primary-dark)}
    .nav-actions{display:flex;align-items:center;gap:12px}
    .command-search{
      width:250px;
      height:44px;
      display:flex;
      align-items:center;
      gap:9px;
      padding:0 10px 0 14px;
      background:#fff;
      border:1px solid var(--border-strong);
      border-radius:14px;
      color:var(--muted);
      box-shadow:0 8px 20px rgba(15,23,42,.04);
      transition:border .2s ease,box-shadow .2s ease;
    }
    .command-search:focus-within{
      border-color:var(--primary);
      box-shadow:0 0 0 4px rgba(37,99,235,.12);
    }
    .command-search input{
      width:100%;
      min-width:0;
      border:0;
      outline:0;
      color:var(--title);
      background:transparent;
      font-size:14px;
    }
    .keycap{
      flex:0 0 auto;
      padding:2px 7px;
      border-radius:7px;
      background:#F1F5F9;
      border:1px solid #E2E8F0;
      color:#64748B;
      font-size:12px;
      font-weight:700;
      line-height:1.6;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:48px;
      padding:0 22px;
      border-radius:13px;
      font-weight:800;
      font-size:15px;
      transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,background .2s ease,color .2s ease;
      white-space:nowrap;
    }
    .btn-primary{
      background:var(--primary);
      color:#fff;
      box-shadow:0 12px 24px rgba(37,99,235,.22);
    }
    .btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 18px 30px rgba(37,99,235,.28)}
    .btn-secondary{
      background:#fff;
      color:var(--text);
      border:1px solid var(--border-strong);
    }
    .btn-secondary:hover{border-color:#93C5FD;color:var(--primary);background:#EFF6FF;transform:translateY(-2px)}
    .btn:focus-visible,.nav-links a:focus-visible,.mobile-toggle:focus-visible,.text-link:focus-visible{
      outline:2px solid var(--primary);
      outline-offset:3px;
    }
    .mobile-toggle{
      display:none;
      width:44px;height:44px;
      border-radius:13px;
      border:1px solid var(--border);
      background:#fff;
      align-items:center;
      justify-content:center;
      color:var(--title);
    }
    .mobile-toggle span,.mobile-toggle span:before,.mobile-toggle span:after{
      display:block;
      width:20px;height:2px;
      border-radius:999px;
      background:currentColor;
      position:relative;
      content:"";
    }
    .mobile-toggle span:before{position:absolute;top:-7px}
    .mobile-toggle span:after{position:absolute;top:7px}
    .mobile-panel{
      display:none;
      padding:0 0 18px;
    }
    .mobile-panel-inner{
      background:#fff;
      border:1px solid var(--border);
      border-radius:20px;
      padding:14px;
      box-shadow:var(--shadow);
      display:grid;
      gap:10px;
    }
    .mobile-panel a{
      padding:12px 14px;
      border-radius:12px;
      font-weight:750;
      color:var(--text);
    }
    .mobile-panel a.active,.mobile-panel a:hover{background:var(--primary-soft);color:var(--primary-dark)}
    .hero{
      position:relative;
      padding:82px 0 92px;
      overflow:hidden;
    }
    .hero:before{
      content:"";
      position:absolute;
      inset:0;
      background-image:
        linear-gradient(rgba(37,99,235,.05) 1px,transparent 1px),
        linear-gradient(90deg,rgba(37,99,235,.05) 1px,transparent 1px);
      background-size:42px 42px;
      mask-image:linear-gradient(180deg,#000 0%,transparent 74%);
      pointer-events:none;
    }
    .hero-grid{
      position:relative;
      display:grid;
      grid-template-columns:1.02fr .98fr;
      gap:54px;
      align-items:center;
    }
    .eyebrow,.badge{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:7px 12px;
      border-radius:999px;
      background:var(--primary-soft);
      color:var(--primary-dark);
      font-size:13px;
      font-weight:800;
      line-height:1.2;
    }
    .badge-green{background:var(--accent-soft);color:#0F766E}
    .badge-amber{background:var(--amber-soft);color:#B45309}
    h1,h2,h3,p{margin-top:0}
    h1{
      margin:20px 0 20px;
      color:var(--title);
      font-size:52px;
      line-height:1.12;
      letter-spacing:-.045em;
      font-weight:850;
    }
    .gradient-text{
      background:linear-gradient(90deg,var(--primary),var(--accent));
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }
    .hero-lead{
      max-width:660px;
      color:#475569;
      font-size:18px;
      line-height:1.85;
      margin-bottom:28px;
    }
    .hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:24px}
    .trust-row{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      color:var(--muted);
      font-size:14px;
      font-weight:700;
    }
    .trust-row span{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:8px 11px;
      background:rgba(255,255,255,.72);
      border:1px solid var(--border);
      border-radius:999px;
    }
    .dot{
      width:7px;height:7px;border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 4px rgba(20,184,166,.13);
    }
    .dashboard{
      position:relative;
      background:rgba(255,255,255,.82);
      border:1px solid rgba(203,213,225,.9);
      border-radius:28px;
      box-shadow:0 24px 70px rgba(15,23,42,.12);
      padding:20px;
      overflow:hidden;
    }
    .dashboard:before{
      content:"";
      position:absolute;
      width:220px;height:220px;
      right:-90px;top:-80px;
      background:radial-gradient(circle,rgba(37,99,235,.18),transparent 70%);
    }
    .dash-top{
      position:relative;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      margin-bottom:18px;
    }
    .dash-search{
      flex:1;
      height:46px;
      border:1px solid var(--border);
      border-radius:14px;
      background:#F8FAFC;
      display:flex;
      align-items:center;
      gap:9px;
      padding:0 14px;
      color:var(--muted);
      font-size:14px;
      font-weight:700;
    }
    .dash-status{
      display:flex;
      gap:7px;
    }
    .status-dot{
      width:10px;height:10px;border-radius:50%;
      background:#CBD5E1;
    }
    .status-dot:nth-child(1){background:#22C55E}
    .status-dot:nth-child(2){background:#F59E0B}
    .status-dot:nth-child(3){background:#60A5FA}
    .dash-body{
      position:relative;
      display:grid;
      grid-template-columns:155px 1fr;
      gap:16px;
    }
    .dash-side{
      display:grid;
      gap:10px;
    }
    .dash-tab{
      border:1px solid var(--border);
      background:#fff;
      border-radius:14px;
      padding:12px;
      color:var(--muted);
      font-size:13px;
      font-weight:800;
      display:flex;
      align-items:center;
      justify-content:space-between;
    }
    .dash-tab.active{background:var(--primary-soft);border-color:#BFDBFE;color:var(--primary-dark)}
    .dash-main{display:grid;gap:14px}
    .preview-card{
      border:1px solid var(--border);
      background:#fff;
      border-radius:18px;
      padding:14px;
      box-shadow:0 10px 24px rgba(15,23,42,.05);
    }
    .preview-cover{
      height:120px;
      border-radius:15px;
      background:
        radial-gradient(circle at 22% 30%,rgba(20,184,166,.24),transparent 30%),
        linear-gradient(135deg,#EFF6FF,#DBEAFE 48%,#F8FAFC);
      position:relative;
      display:grid;
      place-items:center;
      overflow:hidden;
      margin-bottom:12px;
    }
    .preview-cover:after{
      content:"";
      position:absolute;
      inset:14px;
      border-radius:12px;
      border:1px dashed rgba(37,99,235,.28);
    }
    .play{
      width:48px;height:48px;border-radius:50%;
      background:#fff;
      display:grid;
      place-items:center;
      box-shadow:0 12px 24px rgba(37,99,235,.18);
      z-index:2;
    }
    .play:before{
      content:"";
      width:0;height:0;
      border-top:9px solid transparent;
      border-bottom:9px solid transparent;
      border-left:14px solid var(--primary);
      margin-left:3px;
    }
    .skeleton{display:grid;gap:8px}
    .line{height:10px;border-radius:999px;background:#E2E8F0}
    .line.w1{width:75%}.line.w2{width:48%}.line.w3{width:92%}
    .mini-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:10px;
    }
    .mini{
      padding:12px;
      border:1px solid var(--border);
      border-radius:16px;
      background:#F8FAFC;
      min-height:92px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      font-weight:800;
      color:var(--title);
      font-size:13px;
    }
    .mini span{color:var(--muted);font-size:12px;font-weight:700}
    .floating-badge{
      position:absolute;
      right:22px;
      bottom:22px;
      display:flex;
      gap:8px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .section{padding:92px 0}
    .section-tight{padding:70px 0}
    .section-head{
      max-width:760px;
      margin-bottom:34px;
    }
    .section-kicker{
      color:var(--primary);
      font-weight:850;
      font-size:14px;
      margin-bottom:8px;
    }
    h2{
      color:var(--title);
      font-size:38px;
      line-height:1.22;
      letter-spacing:-.035em;
      font-weight:850;
      margin-bottom:14px;
    }
    .section-desc{
      color:var(--muted);
      font-size:17px;
      line-height:1.85;
      margin-bottom:0;
    }
    .card{
      background:var(--panel);
      border:1px solid var(--border);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow);
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
    }
    .card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#BFDBFE}
    .pain-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:18px;
      align-items:stretch;
    }
    .pain-stack{display:grid;gap:18px}
    .pain-card{
      padding:26px;
      display:grid;
      grid-template-columns:auto 1fr;
      gap:18px;
      align-items:flex-start;
    }
    .pain-card.large{
      min-height:100%;
      grid-template-columns:1fr;
      padding:32px;
      background:
        linear-gradient(135deg,rgba(239,246,255,.94),#fff 58%),
        #fff;
    }
    .icon{
      width:46px;height:46px;
      border-radius:15px;
      display:grid;
      place-items:center;
      background:var(--primary-soft);
      color:var(--primary-dark);
      flex:0 0 auto;
    }
    .icon.green{background:var(--accent-soft);color:#0F766E}
    .icon.amber{background:var(--amber-soft);color:#B45309}
    .pain-card h3,.solution-card h3,.index-info h3,.testimonial h3{font-size:21px;line-height:1.35;color:var(--title);margin-bottom:8px}
    .pain-card p,.solution-card p,.index-info p,.testimonial p{color:var(--muted);margin-bottom:0}
    .solution-wrap{
      display:grid;
      grid-template-columns:1fr 330px;
      gap:22px;
      align-items:start;
    }
    .steps{
      position:relative;
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:14px;
    }
    .steps:before{
      content:"";
      position:absolute;
      left:8%;
      right:8%;
      top:40px;
      height:2px;
      background:linear-gradient(90deg,#BFDBFE,#CCFBF1);
      z-index:0;
    }
    .solution-card{
      position:relative;
      z-index:1;
      padding:24px;
      min-height:230px;
    }
    .step-no{
      width:58px;height:38px;
      border-radius:999px;
      background:var(--primary-soft);
      color:var(--primary-dark);
      display:grid;
      place-items:center;
      font-weight:900;
      margin-bottom:24px;
      border:4px solid #fff;
      box-shadow:0 8px 18px rgba(37,99,235,.12);
    }
    .check-panel{
      padding:24px;
      background:linear-gradient(180deg,#fff,#F8FAFC);
    }
    .check-list{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:12px}
    .check-list li{
      display:flex;
      align-items:center;
      gap:10px;
      color:var(--text);
      font-weight:700;
    }
    .check-list li:before{
      content:"✓";
      width:24px;height:24px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:var(--accent-soft);
      color:#0F766E;
      font-size:13px;
      font-weight:900;
    }
    .result-panel{
      background:linear-gradient(135deg,#EFF6FF,#F8FAFC);
      border:1px solid #DBEAFE;
      border-radius:28px;
      padding:30px;
      box-shadow:var(--shadow);
    }
    .stats-grid{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:16px;
    }
    .stat{
      background:#fff;
      border:1px solid var(--border);
      border-radius:20px;
      padding:24px;
    }
    .stat strong{
      display:block;
      color:var(--primary);
      font-size:34px;
      line-height:1.1;
      font-weight:900;
      letter-spacing:-.04em;
      margin-bottom:8px;
    }
    .stat span{color:var(--muted);font-weight:700}
    .index-panel{
      display:grid;
      grid-template-columns:320px 1fr;
      gap:22px;
      padding:22px;
      border-radius:28px;
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow);
    }
    .index-list{
      display:grid;
      gap:10px;
      align-content:start;
    }
    .index-item{
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:14px;
      padding:16px;
      border-radius:16px;
      border:1px solid var(--border);
      background:#F8FAFC;
      font-weight:850;
      color:var(--title);
      transition:.2s ease;
    }
    .index-item:hover,.index-item.active{
      background:var(--primary-soft);
      color:var(--primary-dark);
      border-color:#BFDBFE;
    }
    .index-info{
      display:grid;
      grid-template-columns:1fr 210px;
      gap:22px;
      align-items:stretch;
      padding:20px;
      border:1px solid var(--border);
      border-radius:22px;
      background:linear-gradient(135deg,#fff,#F8FAFC);
    }
    .abstract-cover{
      border-radius:20px;
      min-height:240px;
      background:
        linear-gradient(135deg,rgba(37,99,235,.16),rgba(20,184,166,.14)),
        repeating-linear-gradient(90deg,rgba(255,255,255,.42) 0 1px,transparent 1px 34px),
        #EFF6FF;
      display:grid;
      place-items:center;
      position:relative;
      overflow:hidden;
    }
    .abstract-cover:before{
      content:"";
      position:absolute;
      width:130px;height:130px;
      border-radius:32px;
      border:1px solid rgba(37,99,235,.25);
      transform:rotate(12deg);
      background:rgba(255,255,255,.45);
    }
    .abstract-cover .play{position:relative}
    .tag-row{display:flex;flex-wrap:wrap;gap:9px;margin:16px 0 22px}
    .text-link{
      display:inline-flex;
      align-items:center;
      gap:6px;
      color:var(--primary);
      font-weight:850;
      transition:gap .2s ease,color .2s ease;
    }
    .text-link:hover{gap:10px;color:var(--primary-dark)}
    .testimonials{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:18px;
    }
    .testimonial{
      padding:28px;
    }
    .testimonial.large{min-height:100%;padding:34px;background:linear-gradient(135deg,#fff,#EFF6FF)}
    .quote{
      color:var(--title);
      font-size:20px;
      line-height:1.8;
      font-weight:750;
      margin-bottom:24px;
    }
    .profile{
      display:flex;
      align-items:center;
      gap:12px;
    }
    .avatar{
      width:44px;height:44px;
      border-radius:50%;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      color:#fff;
      display:grid;
      place-items:center;
      font-weight:900;
    }
    .profile strong{display:block;color:var(--title);line-height:1.2}
    .profile span{display:block;color:var(--muted);font-size:13px;font-weight:700}
    .testimonial-stack{display:grid;gap:18px}
    .faq-wrap{
      display:grid;
      gap:12px;
      max-width:900px;
    }
    .faq-item{
      border:1px solid var(--border);
      border-radius:18px;
      background:#fff;
      box-shadow:0 8px 22px rgba(15,23,42,.04);
      overflow:hidden;
    }
    .faq-question{
      width:100%;
      padding:20px 22px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      color:var(--title);
      font-weight:850;
      text-align:left;
    }
    .faq-question:after{
      content:"+";
      width:28px;height:28px;
      border-radius:50%;
      background:#F1F5F9;
      display:grid;
      place-items:center;
      color:var(--primary);
      font-weight:900;
      flex:0 0 auto;
    }
    .faq-item.open .faq-question{background:#F8FBFF}
    .faq-item.open .faq-question:after{content:"−";background:var(--primary-soft)}
    .faq-answer{
      display:none;
      padding:0 22px 20px;
      color:var(--muted);
    }
    .faq-item.open .faq-answer{display:block}
    .cta{
      padding:0 0 96px;
    }
    .cta-panel{
      position:relative;
      overflow:hidden;
      border-radius:30px;
      padding:48px;
      background:
        radial-gradient(circle at 85% 20%,rgba(20,184,166,.20),transparent 26%),
        linear-gradient(135deg,#EFF6FF,#FFFFFF 58%,#ECFEFF);
      border:1px solid #DBEAFE;
      box-shadow:var(--shadow);
      display:grid;
      grid-template-columns:1fr auto;
      gap:30px;
      align-items:center;
    }
    .cta-panel:after{
      content:"";
      position:absolute;
      right:34px;bottom:-38px;
      width:230px;height:150px;
      border-radius:28px;
      border:1px solid rgba(37,99,235,.16);
      background-image:
        linear-gradient(rgba(37,99,235,.10) 1px,transparent 1px),
        linear-gradient(90deg,rgba(37,99,235,.10) 1px,transparent 1px);
      background-size:28px 28px;
      transform:rotate(-8deg);
      opacity:.65;
    }
    .cta-panel > *{position:relative;z-index:1}
    .cta-panel h2{margin-bottom:10px}
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap}
    .site-footer{
      background:var(--footer);
      color:var(--footer-text);
      padding:58px 0 28px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.4fr repeat(3,1fr);
      gap:32px;
      padding-bottom:34px;
      border-bottom:1px solid rgba(203,213,225,.16);
    }
    .footer-brand .logo-main{color:#fff}
    .footer-brand .logo-sub{color:#94A3B8}
    .footer-brand p{color:#94A3B8;margin:18px 0 0;max-width:360px}
    .footer-col h3{
      color:#fff;
      font-size:15px;
      margin-bottom:14px;
    }
    .footer-col a{
      display:block;
      color:#CBD5E1;
      padding:5px 0;
      font-size:14px;
      transition:color .2s ease,transform .2s ease;
    }
    .footer-col a:hover{color:#93C5FD;transform:translateX(3px)}
    .copyright{
      padding-top:24px;
      color:#94A3B8;
      font-size:14px;
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
    }
    .sr-icon{
      width:20px;height:20px;
      stroke:currentColor;
      stroke-width:2;
      fill:none;
      stroke-linecap:round;
      stroke-linejoin:round;
      flex:0 0 auto;
    }
    @media (max-width:1100px){
      .nav-actions .command-search{display:none}
      h1{font-size:46px}
      .hero-grid,.solution-wrap,.index-panel,.testimonials{grid-template-columns:1fr}
      .steps{grid-template-columns:repeat(2,1fr)}
      .steps:before{display:none}
      .stats-grid{grid-template-columns:repeat(2,1fr)}
      .index-info{grid-template-columns:1fr}
      .abstract-cover{min-height:190px}
    }
    @media (max-width:860px){
      .nav-links,.nav-actions{display:none}
      .mobile-toggle{display:flex}
      .mobile-panel.show{display:block}
      .hero{padding:58px 0 70px}
      .hero-grid{gap:34px}
      h1{font-size:38px}
      h2{font-size:30px}
      .hero-lead,.section-desc{font-size:16px}
      .section{padding:66px 0}
      .section-tight{padding:52px 0}
      .pain-grid{grid-template-columns:1fr}
      .dash-body{grid-template-columns:1fr}
      .dash-side{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:1fr 1fr}
      .cta-panel{grid-template-columns:1fr;padding:34px}
    }
    @media (max-width:560px){
      .container{width:min(100% - 28px,var(--container))}
      .nav{height:68px}
      .logo-mark{width:38px;height:38px}
      .logo-main{font-size:13px;max-width:210px;overflow:hidden;text-overflow:ellipsis}
      .logo-sub{display:none}
      h1{font-size:33px;letter-spacing:-.035em}
      h2{font-size:27px}
      .hero-actions,.cta-actions{display:grid;grid-template-columns:1fr}
      .btn{width:100%}
      .mini-grid,.steps,.stats-grid,.footer-grid{grid-template-columns:1fr}
      .pain-card{grid-template-columns:1fr;padding:22px}
      .result-panel,.dashboard,.index-panel{padding:16px;border-radius:22px}
      .section-head{margin-bottom:24px}
      .testimonial,.testimonial.large,.cta-panel{padding:24px}
      .quote{font-size:17px}
      .dash-side{grid-template-columns:1fr}
      .floating-badge{position:static;margin-top:14px;justify-content:flex-start}
      .copyright{display:block}
    }

/* roulang page: category1 */
:root{
      --primary:#2563EB;
      --primary-dark:#1D4ED8;
      --primary-soft:#DBEAFE;
      --accent:#14B8A6;
      --accent-soft:#CCFBF1;
      --amber:#F59E0B;
      --amber-soft:#FEF3C7;
      --bg:#F8FAFC;
      --bg-2:#F9FBFF;
      --panel:#FFFFFF;
      --text:#334155;
      --heading:#0F172A;
      --muted:#64748B;
      --border:#E2E8F0;
      --border-strong:#CBD5E1;
      --footer:#0F172A;
      --radius-sm:8px;
      --radius-md:16px;
      --radius-lg:24px;
      --radius-xl:28px;
      --shadow:0 10px 30px rgba(15,23,42,.06);
      --shadow-hover:0 18px 45px rgba(15,23,42,.10);
      --container:1200px;
      --font:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:var(--font);
      color:var(--text);
      background:
        radial-gradient(circle at 12% 6%, rgba(37,99,235,.10), transparent 28%),
        radial-gradient(circle at 90% 12%, rgba(20,184,166,.10), transparent 24%),
        linear-gradient(180deg,#F9FBFF 0%,#F8FAFC 45%,#FFFFFF 100%);
      line-height:1.75;
      font-size:16px;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none}
    img,svg{max-width:100%;display:block}
    button,input{font:inherit}
    button{cursor:pointer}
    input{outline:none}
    .container{width:min(100% - 40px,var(--container));margin:0 auto}
    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(255,255,255,.88);
      backdrop-filter:blur(12px);
      border-bottom:1px solid rgba(226,232,240,.85);
      box-shadow:0 8px 24px rgba(15,23,42,.04);
    }
    .nav{
      min-height:76px;
      display:flex;
      align-items:center;
      gap:22px;
    }
    .logo{
      display:inline-flex;
      align-items:center;
      gap:12px;
      min-width:265px;
      flex-shrink:0;
    }
    .logo-mark{
      width:42px;
      height:42px;
      border-radius:14px;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      position:relative;
      box-shadow:0 10px 24px rgba(37,99,235,.22);
      flex:0 0 auto;
    }
    .logo-mark:before{
      content:"";
      position:absolute;
      left:15px;
      top:12px;
      border-left:12px solid #fff;
      border-top:8px solid transparent;
      border-bottom:8px solid transparent;
    }
    .logo-mark:after{
      content:"";
      position:absolute;
      right:8px;
      top:9px;
      width:5px;
      height:24px;
      border-left:2px solid rgba(255,255,255,.72);
      border-right:2px solid rgba(255,255,255,.72);
    }
    .logo-text{display:flex;flex-direction:column;line-height:1.2}
    .logo-main{font-weight:800;color:var(--heading);font-size:15px;letter-spacing:-.2px}
    .logo-sub{font-size:12px;color:var(--muted);margin-top:3px}
    .nav-links{
      display:flex;
      align-items:center;
      gap:6px;
      margin-left:auto;
    }
    .nav-links a,.mobile-panel a:not(.btn){
      display:inline-flex;
      align-items:center;
      min-height:40px;
      padding:0 14px;
      border-radius:999px;
      color:#475569;
      font-weight:650;
      font-size:14px;
      transition:.2s ease;
    }
    .nav-links a:hover,.mobile-panel a:not(.btn):hover{
      color:var(--primary);
      background:#EFF6FF;
    }
    .nav-links a.active,.mobile-panel a.active{
      color:var(--primary-dark);
      background:var(--primary-soft);
    }
    .nav-actions{
      display:flex;
      align-items:center;
      gap:10px;
      margin-left:6px;
    }
    .command-search{
      height:44px;
      width:270px;
      display:flex;
      align-items:center;
      gap:9px;
      padding:0 10px 0 13px;
      border:1px solid var(--border-strong);
      border-radius:14px;
      background:#fff;
      transition:.2s ease;
      color:var(--muted);
    }
    .command-search:focus-within{
      border-color:var(--primary);
      box-shadow:0 0 0 4px rgba(37,99,235,.12);
    }
    .command-search input{
      min-width:0;
      flex:1;
      border:0;
      background:transparent;
      color:var(--heading);
      font-size:14px;
    }
    .command-search input::placeholder{color:#94A3B8}
    .sr-icon{
      width:18px;
      height:18px;
      stroke:currentColor;
      fill:none;
      stroke-width:2;
      stroke-linecap:round;
    }
    .keycap{
      font-size:11px;
      line-height:1;
      padding:5px 7px;
      border-radius:7px;
      background:#F1F5F9;
      color:#64748B;
      border:1px solid #E2E8F0;
      white-space:nowrap;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:46px;
      padding:0 20px;
      border-radius:13px;
      font-weight:700;
      font-size:14px;
      border:1px solid transparent;
      transition:.22s ease;
      white-space:nowrap;
    }
    .btn-primary{
      color:#fff;
      background:var(--primary);
      box-shadow:0 12px 22px rgba(37,99,235,.22);
    }
    .btn-primary:hover{
      background:var(--primary-dark);
      transform:translateY(-2px);
      box-shadow:0 16px 30px rgba(37,99,235,.30);
    }
    .btn-secondary{
      color:#334155;
      background:#fff;
      border-color:var(--border-strong);
    }
    .btn-secondary:hover{
      color:var(--primary);
      border-color:#93C5FD;
      background:#EFF6FF;
      transform:translateY(-1px);
    }
    .btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{
      outline:2px solid var(--primary);
      outline-offset:3px;
    }
    .mobile-toggle{
      display:none;
      width:44px;
      height:44px;
      border:1px solid var(--border);
      border-radius:13px;
      background:#fff;
      margin-left:auto;
      position:relative;
    }
    .mobile-toggle span,.mobile-toggle:before,.mobile-toggle:after{
      content:"";
      position:absolute;
      left:12px;
      right:12px;
      height:2px;
      background:#0F172A;
      border-radius:999px;
      transition:.2s ease;
    }
    .mobile-toggle span{top:21px}
    .mobile-toggle:before{top:14px}
    .mobile-toggle:after{top:28px}
    .mobile-toggle.is-open span{opacity:0}
    .mobile-toggle.is-open:before{top:21px;transform:rotate(45deg)}
    .mobile-toggle.is-open:after{top:21px;transform:rotate(-45deg)}
    .mobile-panel{display:none;padding:0 0 16px}
    .mobile-panel-inner{
      display:grid;
      gap:10px;
      background:#fff;
      border:1px solid var(--border);
      border-radius:20px;
      padding:14px;
      box-shadow:var(--shadow);
    }

    main{overflow:hidden}
    .section{padding:88px 0}
    .section-tight{padding:62px 0}
    .page-hero{
      padding:54px 0 34px;
      position:relative;
    }
    .page-hero:before{
      content:"";
      position:absolute;
      inset:0;
      background-image:
        linear-gradient(rgba(37,99,235,.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37,99,235,.05) 1px, transparent 1px);
      background-size:34px 34px;
      mask-image:linear-gradient(to bottom, rgba(0,0,0,.8), transparent);
      pointer-events:none;
    }
    .page-hero-grid{
      position:relative;
      display:grid;
      grid-template-columns:1.04fr .96fr;
      gap:34px;
      align-items:end;
    }
    .breadcrumb{
      display:flex;
      align-items:center;
      gap:8px;
      flex-wrap:wrap;
      color:#64748B;
      font-size:14px;
      margin-bottom:18px;
    }
    .breadcrumb a{font-weight:650}
    .breadcrumb a:hover{color:var(--primary)}
    .breadcrumb span:last-child{color:var(--heading);font-weight:700}
    h1,h2,h3{color:var(--heading);margin:0;line-height:1.18;letter-spacing:-.02em}
    h1{font-size:46px;font-weight:850;max-width:820px}
    h2{font-size:34px;font-weight:820}
    h3{font-size:21px;font-weight:800}
    p{margin:0}
    .lead{
      margin-top:18px;
      font-size:17px;
      color:#475569;
      max-width:720px;
    }
    .hero-panel{
      background:rgba(255,255,255,.86);
      border:1px solid rgba(226,232,240,.95);
      border-radius:var(--radius-xl);
      box-shadow:var(--shadow);
      padding:22px;
    }
    .search-large{
      height:54px;
      width:100%;
      border:1px solid var(--border-strong);
      border-radius:16px;
      background:#fff;
      display:flex;
      align-items:center;
      padding:0 14px;
      gap:10px;
      transition:.2s ease;
      margin-bottom:16px;
    }
    .search-large:focus-within{
      border-color:var(--primary);
      box-shadow:0 0 0 4px rgba(37,99,235,.12);
    }
    .search-large input{
      border:0;
      flex:1;
      min-width:0;
      background:transparent;
      font-size:15px;
      color:var(--heading);
    }
    .filter-tags,.tag-row{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .filter-tag,.badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      border-radius:999px;
      min-height:32px;
      padding:6px 12px;
      font-size:13px;
      font-weight:700;
      border:1px solid transparent;
    }
    .filter-tag{
      border-color:#E2E8F0;
      color:#475569;
      background:#F8FAFC;
      cursor:pointer;
      transition:.2s ease;
    }
    .filter-tag:hover{border-color:#93C5FD;color:var(--primary);background:#EFF6FF}
    .filter-tag.active{color:var(--primary-dark);background:var(--primary-soft);border-color:#BFDBFE}
    .badge-blue{background:var(--primary-soft);color:var(--primary-dark)}
    .badge-green{background:var(--accent-soft);color:#0F766E}
    .badge-amber{background:var(--amber-soft);color:#B45309}
    .badge-gray{background:#F1F5F9;color:#475569;border-color:#E2E8F0}

    .directory-layout{
      display:grid;
      grid-template-columns:minmax(0,1fr) 340px;
      gap:28px;
      align-items:start;
    }
    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:24px;
      margin-bottom:26px;
    }
    .section-head p{
      color:var(--muted);
      max-width:620px;
      margin-top:10px;
    }
    .zone-list{
      display:grid;
      gap:16px;
    }
    .zone-card{
      display:grid;
      grid-template-columns:54px minmax(0,1fr) auto;
      gap:18px;
      align-items:center;
      background:#fff;
      border:1px solid var(--border);
      border-radius:20px;
      padding:22px;
      box-shadow:var(--shadow);
      transition:.24s ease;
    }
    .zone-card:hover{
      transform:translateY(-3px);
      border-color:#93C5FD;
      box-shadow:var(--shadow-hover);
    }
    .zone-icon{
      width:54px;
      height:54px;
      border-radius:18px;
      background:linear-gradient(135deg,#EFF6FF,#CCFBF1);
      display:grid;
      place-items:center;
      color:var(--primary);
      flex-shrink:0;
    }
    .zone-icon svg{
      width:28px;
      height:28px;
      stroke:currentColor;
      fill:none;
      stroke-width:1.9;
      stroke-linecap:round;
      stroke-linejoin:round;
    }
    .zone-card h3{font-size:20px;margin-bottom:6px}
    .zone-card p{color:#64748B;font-size:15px;max-width:660px}
    .meta-row{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:13px;
    }
    .text-btn{
      color:var(--primary);
      font-weight:800;
      display:inline-flex;
      align-items:center;
      gap:7px;
      white-space:nowrap;
    }
    .text-btn .arrow{transition:.2s ease}
    .zone-card:hover .text-btn .arrow{transform:translateX(4px)}
    .sidebar{
      position:sticky;
      top:96px;
      display:grid;
      gap:16px;
    }
    .side-card,.content-card{
      background:#fff;
      border:1px solid var(--border);
      border-radius:18px;
      padding:20px;
      box-shadow:var(--shadow);
    }
    .side-card h3{font-size:18px;margin-bottom:12px}
    .side-list{
      display:grid;
      gap:10px;
      padding:0;
      margin:0;
      list-style:none;
    }
    .side-list li{
      display:flex;
      gap:10px;
      color:#475569;
      font-size:14px;
    }
    .side-list li:before{
      content:"";
      width:7px;
      height:7px;
      border-radius:99px;
      background:var(--accent);
      margin-top:9px;
      flex:0 0 auto;
    }
    .side-cta{
      background:linear-gradient(135deg,#EFF6FF,#F0FDFA);
      border-color:#BFDBFE;
    }
    .side-cta p{font-size:14px;color:#475569;margin:10px 0 16px}

    .recommend-panel{
      display:grid;
      grid-template-columns:.9fr 1.1fr;
      gap:24px;
      align-items:center;
      background:linear-gradient(135deg,#EFF6FF 0%,#FFFFFF 52%,#F0FDFA 100%);
      border:1px solid #BFDBFE;
      border-radius:var(--radius-xl);
      padding:30px;
      box-shadow:var(--shadow);
      margin:32px 0;
    }
    .recommend-panel p{color:#475569;margin-top:12px}
    .recommend-cards{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:12px;
    }
    .mini-card{
      background:#fff;
      border:1px solid var(--border);
      border-radius:18px;
      padding:16px;
      transition:.22s ease;
    }
    .mini-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#93C5FD}
    .mini-visual{
      height:82px;
      border-radius:14px;
      margin-bottom:12px;
      background:
        linear-gradient(135deg,rgba(37,99,235,.18),rgba(20,184,166,.18)),
        repeating-linear-gradient(90deg,rgba(255,255,255,.55) 0 10px,transparent 10px 18px);
      display:grid;
      place-items:center;
      color:var(--primary);
    }
    .mini-visual:before{
      content:"▶";
      width:34px;
      height:34px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:#fff;
      box-shadow:0 8px 18px rgba(15,23,42,.10);
      font-size:13px;
      padding-left:2px;
    }
    .mini-card strong{display:block;color:var(--heading);margin:8px 0 4px}
    .mini-card span{font-size:13px;color:#64748B}

    .guide-section{
      background:#fff;
      border-top:1px solid var(--border);
      border-bottom:1px solid var(--border);
    }
    .guide-grid{
      display:grid;
      grid-template-columns:.82fr 1.18fr;
      gap:32px;
      align-items:start;
    }
    .guide-intro{
      padding:28px;
      border-radius:var(--radius-lg);
      background:#0F172A;
      color:#CBD5E1;
      position:relative;
      overflow:hidden;
    }
    .guide-intro:after{
      content:"";
      position:absolute;
      right:-70px;
      bottom:-70px;
      width:190px;
      height:190px;
      border-radius:50%;
      background:rgba(37,99,235,.32);
    }
    .guide-intro h2{color:#fff}
    .guide-intro p{margin-top:14px;color:#CBD5E1;position:relative;z-index:1}
    .guide-steps{display:grid;gap:16px}
    .guide-step{
      display:grid;
      grid-template-columns:58px 1fr;
      gap:16px;
      background:#fff;
      border:1px solid var(--border);
      border-radius:20px;
      padding:22px;
      box-shadow:var(--shadow);
    }
    .step-no{
      width:46px;
      height:46px;
      border-radius:15px;
      background:var(--primary-soft);
      color:var(--primary-dark);
      display:grid;
      place-items:center;
      font-weight:850;
    }
    .guide-step p{color:#64748B;margin-top:7px}

    .faq-wrap{
      display:grid;
      gap:12px;
      margin-top:26px;
    }
    .faq-item{
      background:#fff;
      border:1px solid var(--border);
      border-radius:18px;
      overflow:hidden;
      box-shadow:0 8px 20px rgba(15,23,42,.04);
    }
    .faq-question{
      width:100%;
      min-height:62px;
      border:0;
      background:#fff;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      text-align:left;
      padding:18px 22px;
      color:var(--heading);
      font-weight:800;
      transition:.2s ease;
    }
    .faq-question:hover{background:#F8FAFC;color:var(--primary)}
    .faq-question span:last-child{
      width:26px;
      height:26px;
      border-radius:9px;
      background:#EFF6FF;
      color:var(--primary);
      display:grid;
      place-items:center;
      flex-shrink:0;
      transition:.2s ease;
    }
    .faq-item.open .faq-question{
      background:#EFF6FF;
      color:var(--primary-dark);
    }
    .faq-item.open .faq-question span:last-child{transform:rotate(45deg)}
    .faq-answer{
      display:none;
      padding:0 22px 20px;
      color:#64748B;
      border-left:3px solid var(--primary);
      margin-left:22px;
    }
    .faq-item.open .faq-answer{display:block}

    .cta-panel{
      border-radius:var(--radius-xl);
      padding:38px;
      background:
        radial-gradient(circle at 15% 20%,rgba(37,99,235,.16),transparent 28%),
        radial-gradient(circle at 85% 80%,rgba(20,184,166,.18),transparent 28%),
        linear-gradient(135deg,#EFF6FF,#FFFFFF 54%,#F0FDFA);
      border:1px solid #BFDBFE;
      box-shadow:var(--shadow);
      display:grid;
      grid-template-columns:1fr auto;
      gap:24px;
      align-items:center;
    }
    .cta-panel p{color:#475569;margin-top:12px;max-width:720px}
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap}

    .site-footer{
      background:var(--footer);
      color:#CBD5E1;
      padding:58px 0 26px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.45fr repeat(3,1fr);
      gap:30px;
      align-items:start;
    }
    .site-footer .logo-main{color:#fff}
    .site-footer .logo-sub{color:#94A3B8}
    .footer-brand p{
      margin-top:16px;
      color:#CBD5E1;
      max-width:460px;
      font-size:14px;
    }
    .footer-col h3{
      color:#fff;
      font-size:15px;
      margin-bottom:14px;
    }
    .footer-col a{
      display:block;
      color:#CBD5E1;
      font-size:14px;
      margin:9px 0;
      transition:.2s ease;
    }
    .footer-col a:hover{
      color:#93C5FD;
      transform:translateX(3px);
    }
    .copyright{
      margin-top:34px;
      padding-top:22px;
      border-top:1px solid rgba(148,163,184,.22);
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
      color:#94A3B8;
      font-size:13px;
    }

    @media (max-width:1120px){
      .nav-actions .btn-secondary{display:none}
      .command-search{width:230px}
      h1{font-size:40px}
      .directory-layout{grid-template-columns:1fr 310px}
    }
    @media (max-width:980px){
      .nav-links,.nav-actions{display:none}
      .mobile-toggle{display:block}
      .mobile-panel.is-open{display:block}
      .logo{min-width:0}
      .logo-main{font-size:14px}
      .page-hero-grid,.directory-layout,.recommend-panel,.guide-grid,.cta-panel{
        grid-template-columns:1fr;
      }
      .sidebar{position:static;grid-template-columns:repeat(2,1fr)}
      .recommend-cards{grid-template-columns:repeat(3,1fr)}
      .section{padding:72px 0}
    }
    @media (max-width:760px){
      .container{width:min(100% - 28px,var(--container))}
      .logo-sub{display:none}
      .logo-main{max-width:230px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
      .page-hero{padding:36px 0 24px}
      h1{font-size:34px}
      h2{font-size:28px}
      .lead{font-size:16px}
      .zone-card{
        grid-template-columns:1fr;
        gap:14px;
        padding:20px;
      }
      .zone-icon{width:50px;height:50px}
      .text-btn{justify-content:flex-start}
      .section-head{display:block}
      .sidebar{grid-template-columns:1fr}
      .recommend-cards{grid-template-columns:1fr}
      .guide-step{grid-template-columns:1fr}
      .cta-panel{padding:26px}
      .cta-actions .btn{width:100%}
      .footer-grid{grid-template-columns:1fr 1fr}
      .footer-brand{grid-column:1/-1}
    }
    @media (max-width:520px){
      body{font-size:15px}
      .nav{min-height:68px}
      .logo-mark{width:38px;height:38px;border-radius:13px}
      .logo-main{max-width:190px}
      h1{font-size:32px}
      .hero-panel,.recommend-panel{padding:18px;border-radius:22px}
      .filter-tag{min-height:34px}
      .section{padding:58px 0}
      .section-tight{padding:48px 0}
      .footer-grid{grid-template-columns:1fr}
      .copyright{display:grid}
      .command-search{width:100%}
    }