/* roulang page: index */
:root{
      --brand:#6d4aff;
      --brand-2:#ff7a59;
      --brand-3:#20c997;
      --ink:#172033;
      --muted:#657085;
      --soft:#f5f3ff;
      --soft-2:#fff7ed;
      --bg:#fbfbfe;
      --card:#ffffff;
      --line:#e8e7f2;
      --line-dark:rgba(255,255,255,.16);
      --radius-sm:12px;
      --radius:22px;
      --radius-lg:34px;
      --shadow-sm:0 10px 24px rgba(28,35,70,.08);
      --shadow:0 22px 60px rgba(34,31,84,.14);
      --shadow-hover:0 26px 70px rgba(34,31,84,.2);
      --container:1160px;
      --nav-h:76px;
    }

    *{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 8% 8%, rgba(109,74,255,.14), transparent 28%),
        radial-gradient(circle at 92% 14%, rgba(255,122,89,.12), transparent 25%),
        linear-gradient(180deg,#ffffff 0%,var(--bg) 42%,#ffffff 100%);
      line-height:1.75;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,transform .2s ease,box-shadow .2s ease}
    a:hover{color:var(--brand)}
    img{max-width:100%;height:auto;display:block}
    button,input,textarea,select{font:inherit}
    ::selection{background:rgba(109,74,255,.18);color:var(--ink)}
    .container{max-width:var(--container);padding-left:20px;padding-right:20px}
    .section-pad{padding:86px 0}
    .section-pad-sm{padding:62px 0}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border-radius:999px;
      color:#5537da;background:rgba(109,74,255,.1);
      border:1px solid rgba(109,74,255,.18);
      font-weight:700;font-size:14px;
    }
    .eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 0 6px rgba(255,122,89,.14)}
    .section-title{
      font-size:clamp(28px,3vw,42px);
      line-height:1.18;
      letter-spacing:-.02em;
      font-weight:850;
      margin:16px 0 14px;
    }
    .section-desc{
      color:var(--muted);
      font-size:17px;
      max-width:780px;
      margin:0;
    }
    .text-gradient{
      background:linear-gradient(90deg,var(--brand),#9b5cff,var(--brand-2));
      -webkit-background-clip:text;background-clip:text;color:transparent;
    }
    .btn-brand,.btn-ghost,.btn-warm{
      display:inline-flex;align-items:center;justify-content:center;gap:9px;
      border:0;border-radius:999px;
      padding:13px 20px;
      min-height:48px;
      font-weight:800;
      letter-spacing:.01em;
      transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
      cursor:pointer;
    }
    .btn-brand{
      color:#fff;background:linear-gradient(135deg,var(--brand),#8c65ff);
      box-shadow:0 14px 28px rgba(109,74,255,.28);
    }
    .btn-brand:hover{color:#fff;transform:translateY(-2px);box-shadow:0 18px 38px rgba(109,74,255,.34)}
    .btn-brand:active,.btn-warm:active,.btn-ghost:active{transform:translateY(0) scale(.99)}
    .btn-warm{
      color:#fff;background:linear-gradient(135deg,var(--brand-2),#ff9d5c);
      box-shadow:0 14px 28px rgba(255,122,89,.25);
    }
    .btn-warm:hover{color:#fff;transform:translateY(-2px);box-shadow:0 18px 38px rgba(255,122,89,.3)}
    .btn-ghost{
      color:var(--ink);background:rgba(255,255,255,.72);
      border:1px solid var(--line);
      box-shadow:var(--shadow-sm);
    }
    .btn-ghost:hover{color:var(--brand);transform:translateY(-2px);border-color:rgba(109,74,255,.28);box-shadow:var(--shadow)}
    .btn-brand:focus-visible,.btn-ghost:focus-visible,.btn-warm:focus-visible,.form-control:focus-visible{
      outline:4px solid rgba(109,74,255,.2);
      outline-offset:2px;
    }

    .site-header{
      position:sticky;top:0;z-index:50;
      background:rgba(255,255,255,.82);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(232,231,242,.86);
    }
    .navbar{min-height:var(--nav-h);padding:0}
    .navbar-brand{
      display:flex;align-items:center;gap:12px;
      color:var(--ink)!important;
      font-weight:900;
      letter-spacing:-.03em;
      max-width:62%;
      white-space:normal;
      line-height:1.2;
    }
    .logo-mark{
      width:42px;height:42px;flex:0 0 auto;border-radius:14px;
      display:grid;place-items:center;color:#fff;font-weight:900;
      background:conic-gradient(from 160deg,var(--brand),#9b5cff,var(--brand-2),var(--brand));
      box-shadow:0 12px 28px rgba(109,74,255,.28);
    }
    .navbar-toggler{
      border:1px solid var(--line);border-radius:14px;padding:9px 11px;
      background:#fff;box-shadow:var(--shadow-sm);
    }
    .navbar-toggler:focus{box-shadow:0 0 0 4px rgba(109,74,255,.16)}
    .nav-link{
      color:var(--muted)!important;
      font-weight:800;
      padding:10px 16px!important;
      border-radius:999px;
    }
    .nav-link:hover,.nav-link.active{
      color:var(--brand)!important;
      background:rgba(109,74,255,.1);
    }
    .header-chip{
      display:inline-flex;align-items:center;gap:8px;
      border:1px solid rgba(32,201,151,.24);
      background:rgba(32,201,151,.1);
      color:#0d8666;
      border-radius:999px;
      padding:9px 13px;
      font-size:13px;
      font-weight:800;
    }

    .hero{
      padding:62px 0 34px;
      position:relative;
    }
    .hero-shell{
      position:relative;
      overflow:hidden;
      border-radius:var(--radius-lg);
      min-height:520px;
      color:#fff;
      background:
        linear-gradient(115deg,rgba(16,18,42,.94),rgba(64,44,160,.92) 48%,rgba(255,122,89,.86)),
        radial-gradient(circle at 18% 10%,rgba(255,255,255,.28),transparent 20%);
      box-shadow:var(--shadow);
      padding:52px;
    }
    .hero-shell:before{
      content:"";position:absolute;inset:-30% -15% auto auto;
      width:520px;height:520px;border-radius:50%;
      background:radial-gradient(circle,rgba(255,255,255,.25),transparent 62%);
      pointer-events:none;
    }
    .hero-grid{
      position:relative;z-index:1;
      display:grid;
      grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);
      gap:34px;
      align-items:stretch;
    }
    .hero h1{
      font-size:clamp(36px,5.2vw,66px);
      line-height:1.05;
      letter-spacing:-.055em;
      font-weight:950;
      margin:18px 0 20px;
    }
    .hero-lead{
      max-width:680px;
      color:rgba(255,255,255,.86);
      font-size:18px;
      margin-bottom:28px;
    }
    .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
    .hero-actions .btn-ghost{
      background:rgba(255,255,255,.12);
      border-color:rgba(255,255,255,.2);
      color:#fff;
      box-shadow:none;
    }
    .hero-actions .btn-ghost:hover{background:rgba(255,255,255,.2);color:#fff}
    .hero-points{
      display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;
      max-width:650px;
    }
    .hero-point{
      padding:13px 14px;border:1px solid rgba(255,255,255,.16);
      background:rgba(255,255,255,.1);
      border-radius:18px;
    }
    .hero-point strong{display:block;font-size:22px;line-height:1.1}
    .hero-point span{display:block;color:rgba(255,255,255,.75);font-size:13px;margin-top:4px}

    .group-panel{
      align-self:center;
      background:rgba(255,255,255,.13);
      border:1px solid rgba(255,255,255,.2);
      box-shadow:0 28px 70px rgba(0,0,0,.16);
      backdrop-filter:blur(16px);
      border-radius:30px;
      padding:24px;
    }
    .group-top{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;margin-bottom:18px}
    .group-title{font-weight:900;font-size:22px;margin:0}
    .group-badge{
      flex:0 0 auto;
      color:#10201b;background:#d8fff2;
      border-radius:999px;padding:6px 10px;
      font-size:13px;font-weight:900;
    }
    .progress-wrap{margin:18px 0 20px}
    .progress-meta{display:flex;justify-content:space-between;color:rgba(255,255,255,.82);font-size:14px;margin-bottom:9px}
    .progress{
      height:13px;border-radius:999px;background:rgba(255,255,255,.18);overflow:hidden;
    }
    .progress-bar{
      width:76%;
      background:linear-gradient(90deg,#20c997,#b8ffdc);
      border-radius:999px;
    }
    .group-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .group-list li{
      display:flex;align-items:center;gap:10px;
      padding:12px;border-radius:16px;
      background:rgba(255,255,255,.1);
      color:rgba(255,255,255,.86);
    }
    .check{
      width:24px;height:24px;border-radius:50%;
      display:grid;place-items:center;
      background:rgba(32,201,151,.2);
      color:#c7ffe9;font-weight:900;
      flex:0 0 auto;
    }
    .mini-note{font-size:13px;color:rgba(255,255,255,.68);margin-top:16px}

    .pain-board{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:26px;
      align-items:stretch;
      margin-top:34px;
    }
    .pain-demo{
      background:#111629;color:#fff;
      border-radius:var(--radius-lg);
      padding:28px;
      box-shadow:var(--shadow);
      position:relative;
      overflow:hidden;
    }
    .pain-demo:after{
      content:"";position:absolute;right:-80px;bottom:-80px;width:240px;height:240px;border-radius:50%;
      background:rgba(255,122,89,.18);
    }
    .window-dots{display:flex;gap:8px;margin-bottom:22px}
    .window-dots span{width:11px;height:11px;border-radius:50%;background:#ff6b6b}
    .window-dots span:nth-child(2){background:#ffd166}
    .window-dots span:nth-child(3){background:#20c997}
    .buffer-line{
      display:flex;align-items:center;gap:12px;
      padding:14px;border-radius:16px;
      background:rgba(255,255,255,.07);
      margin-bottom:12px;
      position:relative;z-index:1;
    }
    .buffer-icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      background:rgba(255,255,255,.1);
      color:#fff;font-weight:900;
    }
    .buffer-line strong{display:block}
    .buffer-line small{color:rgba(255,255,255,.62)}
    .solution-card{
      background:var(--card);
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      padding:28px;
      box-shadow:var(--shadow-sm);
    }
    .solution-list{display:grid;gap:14px;margin:22px 0 0;padding:0;list-style:none}
    .solution-list li{
      display:grid;grid-template-columns:34px 1fr;gap:12px;
      padding:15px;border-radius:18px;
      background:linear-gradient(180deg,#fff,rgba(245,243,255,.72));
      border:1px solid var(--line);
    }
    .solution-list b{display:grid;place-items:center;width:34px;height:34px;border-radius:12px;background:rgba(109,74,255,.11);color:var(--brand)}
    .solution-list strong{display:block;margin-bottom:2px}
    .solution-list span{color:var(--muted);font-size:14px}

    .steps-strip{
      margin-top:34px;
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:18px;
    }
    .step-card{
      position:relative;
      min-height:230px;
      padding:28px;
      border-radius:var(--radius);
      background:var(--card);
      border:1px solid var(--line);
      box-shadow:var(--shadow-sm);
      overflow:hidden;
      transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
    }
    .step-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:rgba(109,74,255,.25)}
    .step-no{
      display:inline-grid;place-items:center;width:48px;height:48px;border-radius:17px;
      color:#fff;background:linear-gradient(135deg,var(--brand),#9b5cff);
      font-weight:950;margin-bottom:20px;
    }
    .step-card h3{font-size:22px;font-weight:900;margin-bottom:10px}
    .step-card p{color:var(--muted);margin:0}
    .step-card:after{
      content:"";position:absolute;right:-36px;top:-36px;width:130px;height:130px;border-radius:38px;
      background:rgba(109,74,255,.07);transform:rotate(18deg);
    }

    .hot-scroll{
      display:flex;
      gap:18px;
      overflow-x:auto;
      padding:8px 2px 18px;
      margin-top:30px;
      scroll-snap-type:x mandatory;
    }
    .hot-scroll::-webkit-scrollbar{height:9px}
    .hot-scroll::-webkit-scrollbar-thumb{background:rgba(109,74,255,.22);border-radius:999px}
    .hot-item{
      min-width:286px;
      scroll-snap-align:start;
      border-radius:var(--radius);
      border:1px solid var(--line);
      background:var(--card);
      padding:22px;
      box-shadow:var(--shadow-sm);
      transition:transform .2s ease,box-shadow .2s ease;
    }
    .hot-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .hot-num{
      display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;
      color:var(--muted);font-weight:800;
    }
    .hot-num em{
      font-style:normal;font-size:28px;color:var(--brand);
      letter-spacing:-.04em;
    }
    .hot-item h3{font-size:21px;font-weight:900;margin-bottom:8px}
    .hot-item p{font-size:15px;color:var(--muted);margin-bottom:18px}
    .mini-btn{
      display:inline-flex;align-items:center;gap:6px;
      color:var(--brand);font-weight:900;
      padding:9px 12px;border-radius:999px;
      background:rgba(109,74,255,.1);
    }
    .mini-btn:hover{background:rgba(109,74,255,.16);color:var(--brand);transform:translateX(2px)}

    .benefit-wrap{
      display:grid;
      grid-template-columns:.9fr 1.1fr;
      gap:24px;
      align-items:stretch;
      margin-top:34px;
    }
    .member-card{
      border-radius:var(--radius-lg);
      padding:30px;
      color:#fff;
      background:
        linear-gradient(145deg,rgba(109,74,255,.95),rgba(255,122,89,.85)),
        radial-gradient(circle at 80% 20%,rgba(255,255,255,.24),transparent 28%);
      box-shadow:var(--shadow);
    }
    .member-card h3{font-size:30px;font-weight:950;margin-bottom:12px}
    .member-card p{color:rgba(255,255,255,.82)}
    .member-price{display:flex;align-items:flex-end;gap:8px;margin:26px 0}
    .member-price strong{font-size:50px;line-height:1;font-weight:950}
    .member-price span{color:rgba(255,255,255,.76);margin-bottom:7px}
    .benefit-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:16px;
    }
    .benefit-item{
      background:var(--card);
      border:1px solid var(--line);
      border-radius:var(--radius);
      padding:22px;
      box-shadow:var(--shadow-sm);
    }
    .benefit-icon{
      width:42px;height:42px;border-radius:15px;display:grid;place-items:center;
      background:var(--soft);color:var(--brand);font-weight:950;margin-bottom:14px;
    }
    .benefit-item h4{font-size:18px;font-weight:900;margin-bottom:7px}
    .benefit-item p{font-size:14px;color:var(--muted);margin:0}

    .compare-card{
      margin-top:34px;
      background:var(--card);
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .compare-row{
      display:grid;
      grid-template-columns:1fr 1fr 1fr;
      border-bottom:1px solid var(--line);
    }
    .compare-row:last-child{border-bottom:0}
    .compare-cell{
      padding:20px;
      border-right:1px solid var(--line);
    }
    .compare-cell:last-child{border-right:0}
    .compare-head{
      background:linear-gradient(180deg,#faf9ff,#fff);
      font-weight:950;
      color:var(--ink);
    }
    .compare-cell.good{background:rgba(109,74,255,.045)}
    .compare-cell.muted{color:var(--muted)}
    .compare-cell strong{display:block;margin-bottom:3px}
    .compare-tail{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      padding:22px;
      background:linear-gradient(90deg,rgba(109,74,255,.1),rgba(255,122,89,.08));
    }

    .trust-line{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:14px;
      margin-top:30px;
    }
    .trust-pill{
      padding:18px;
      border-radius:20px;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow-sm);
    }
    .trust-pill strong{display:block;font-size:24px;font-weight:950;color:var(--brand);line-height:1.2}
    .trust-pill span{color:var(--muted);font-size:14px}

    .faq-list{margin-top:34px;display:grid;gap:14px}
    .faq-item{
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:#fff;
      padding:22px 24px;
      box-shadow:var(--shadow-sm);
    }
    .faq-item h3{font-size:18px;font-weight:900;margin:0 0 8px}
    .faq-item p{color:var(--muted);margin:0}

    .news-area{
      display:grid;
      grid-template-columns:1.3fr .7fr;
      gap:24px;
      margin-top:34px;
    }
    .news-list,.recommend-box{
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-sm);
      overflow:hidden;
    }
    .news-item{
      display:grid;
      grid-template-columns:108px 1fr auto;
      gap:18px;
      align-items:center;
      padding:20px 22px;
      border-bottom:1px solid var(--line);
    }
    .news-item:last-child{border-bottom:0}
    .news-date{
      display:grid;place-items:center;
      height:68px;border-radius:18px;
      background:var(--soft);
      color:var(--brand);
      font-weight:950;
    }
    .news-item a{
      font-size:18px;font-weight:900;color:var(--ink);
    }
    .news-item a:hover{color:var(--brand)}
    .news-item p{color:var(--muted);font-size:14px;margin:4px 0 0}
    .news-arrow{color:var(--brand);font-weight:950}
    .recommend-box{padding:24px}
    .recommend-box h3{font-size:22px;font-weight:950;margin-bottom:12px}
    .recommend-list{display:grid;gap:12px;margin:18px 0 0;padding:0;list-style:none}
    .recommend-list li a{
      display:flex;justify-content:space-between;gap:12px;
      padding:13px 14px;border-radius:16px;
      background:linear-gradient(180deg,#fff,#fbfaff);
      border:1px solid var(--line);
      font-weight:800;
    }
    .recommend-list li a:hover{border-color:rgba(109,74,255,.28);background:rgba(109,74,255,.07);transform:translateY(-2px)}

    .start-section{padding:72px 0 92px}
    .start-panel{
      display:grid;
      grid-template-columns:1fr .92fr;
      gap:28px;
      align-items:stretch;
      border-radius:var(--radius-lg);
      padding:34px;
      background:
        linear-gradient(135deg,#171b35,#342065 55%,#6d4aff);
      color:#fff;
      box-shadow:var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .start-panel:before{
      content:"";position:absolute;left:-100px;bottom:-140px;width:340px;height:340px;border-radius:50%;
      background:rgba(255,122,89,.2);
    }
    .start-copy,.lead-form{position:relative;z-index:1}
    .start-copy h2{font-size:clamp(30px,4vw,46px);font-weight:950;line-height:1.15;margin:10px 0 14px}
    .start-copy p{color:rgba(255,255,255,.78);font-size:17px;max-width:620px}
    .start-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
    .start-tags span{
      padding:9px 12px;border-radius:999px;
      background:rgba(255,255,255,.12);
      border:1px solid rgba(255,255,255,.18);
      color:rgba(255,255,255,.86);
      font-weight:800;font-size:13px;
    }
    .lead-form{
      background:rgba(255,255,255,.12);
      border:1px solid rgba(255,255,255,.18);
      border-radius:28px;
      padding:24px;
      backdrop-filter:blur(16px);
    }
    .lead-form label{font-weight:850;margin-bottom:7px}
    .lead-form .form-control{
      border:1px solid rgba(255,255,255,.22);
      background:rgba(255,255,255,.92);
      border-radius:16px;
      padding:13px 14px;
      box-shadow:none;
    }
    .lead-form .form-control:focus{
      border-color:#c8bdff;
      box-shadow:0 0 0 4px rgba(255,255,255,.16);
    }
    .privacy-note{font-size:13px;color:rgba(255,255,255,.66);margin:12px 0 0}
    .form-status{font-size:14px;color:#c7ffe9;margin-top:10px;display:none}

    .site-footer{
      background:#101425;
      color:rgba(255,255,255,.78);
      padding:44px 0 28px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:24px;
      align-items:start;
      padding-bottom:28px;
      border-bottom:1px solid var(--line-dark);
    }
    .footer-brand{display:flex;align-items:center;gap:12px;color:#fff;font-weight:950;font-size:20px;margin-bottom:12px}
    .footer-brand .logo-mark{width:38px;height:38px;border-radius:13px}
    .footer-copy{max-width:660px;color:rgba(255,255,255,.62);margin:0}
    .footer-links{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}
    .footer-links a{
      padding:9px 12px;border-radius:999px;
      color:rgba(255,255,255,.76);
      background:rgba(255,255,255,.06);
      border:1px solid rgba(255,255,255,.1);
      font-weight:800;
    }
    .footer-links a:hover{color:#fff;background:rgba(255,255,255,.12)}
    .copyright{
      display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
      padding-top:22px;
      color:rgba(255,255,255,.54);
      font-size:14px;
    }

    @media (max-width:1024px){
      .hero-shell{padding:38px}
      .hero-grid,.pain-board,.benefit-wrap,.start-panel{grid-template-columns:1fr}
      .group-panel{max-width:720px}
      .trust-line{grid-template-columns:repeat(2,minmax(0,1fr))}
      .news-area{grid-template-columns:1fr}
    }
    @media (max-width:768px){
      :root{--nav-h:68px}
      .section-pad{padding:64px 0}
      .section-pad-sm{padding:50px 0}
      .navbar-collapse{
        margin-top:12px;
        padding:14px;
        border:1px solid var(--line);
        border-radius:20px;
        background:#fff;
        box-shadow:var(--shadow-sm);
      }
      .navbar-brand{font-size:16px;max-width:74%}
      .header-chip{margin-top:10px;width:100%;justify-content:center}
      .hero{padding-top:30px}
      .hero-shell{min-height:auto;padding:28px;border-radius:28px}
      .hero-points,.steps-strip,.benefit-grid{grid-template-columns:1fr}
      .compare-row{grid-template-columns:1fr}
      .compare-cell{border-right:0;border-bottom:1px solid var(--line)}
      .compare-row .compare-cell:last-child{border-bottom:0}
      .compare-tail{align-items:flex-start;flex-direction:column}
      .news-item{grid-template-columns:1fr;gap:10px}
      .news-date{width:96px;height:54px}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
    }
    @media (max-width:520px){
      .container{padding-left:16px;padding-right:16px}
      .hero-shell,.start-panel{padding:22px;border-radius:24px}
      .hero-actions{flex-direction:column}
      .btn-brand,.btn-ghost,.btn-warm{width:100%}
      .group-top{flex-direction:column}
      .pain-demo,.solution-card,.member-card,.lead-form{padding:22px;border-radius:24px}
      .trust-line{grid-template-columns:1fr}
      .hot-item{min-width:255px}
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}