/* roulang page: index */
:root{
      --bg:#0e1116;
      --bg-2:#121722;
      --surface:#171d28;
      --surface-2:#202837;
      --light:#f6f7f8;
      --light-2:#ffffff;
      --text:#f4f7fa;
      --text-dark:#1a1d21;
      --muted:#8e98a8;
      --muted-dark:#667085;
      --primary:#29d6a3;
      --primary-2:#22c55e;
      --accent:#ff8a4c;
      --accent-2:#f97316;
      --border:rgba(255,255,255,.11);
      --border-light:#e6e8ec;
      --shadow:0 18px 48px rgba(0,0,0,.24);
      --shadow-soft:0 14px 32px rgba(16,24,40,.10);
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:16px;
      --radius-sm:12px;
      --container:1200px;
      --header-h:76px;
      --ease:220ms ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;scroll-padding-top:96px}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text-dark);
      background:var(--light);
      line-height:1.72;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(41,214,163,.32)}
    .container{width:min(100% - 48px,var(--container));margin-inline:auto}
    .section{padding:92px 0}
    .section-tight{padding:72px 0}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      border:1px solid rgba(41,214,163,.24);
      background:rgba(41,214,163,.10);
      color:#bdf8e7;
      font-size:13px;
      font-weight:700;
      letter-spacing:.02em;
    }
    .eyebrow.dark{
      color:#087a59;
      background:rgba(41,214,163,.13);
      border-color:rgba(41,214,163,.24);
    }
    .dot{
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--primary);
      box-shadow:0 0 0 5px rgba(41,214,163,.15);
      flex:0 0 auto;
    }
    .section-head{
      display:flex;
      justify-content:space-between;
      gap:28px;
      align-items:flex-end;
      margin-bottom:34px;
    }
    .section-title{
      margin:12px 0 0;
      font-size:clamp(26px,3.2vw,38px);
      line-height:1.22;
      letter-spacing:-.03em;
    }
    .section-desc{
      margin:0;
      max-width:560px;
      color:var(--muted-dark);
      font-size:16px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:46px;
      padding:12px 20px;
      border-radius:999px;
      border:1px solid transparent;
      font-weight:800;
      transition:transform var(--ease),background var(--ease),border-color var(--ease),box-shadow var(--ease),color var(--ease);
      user-select:none;
      white-space:nowrap;
    }
    .btn-primary{
      background:linear-gradient(135deg,var(--primary),var(--primary-2));
      color:#07120f;
      box-shadow:0 14px 34px rgba(41,214,163,.27);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 42px rgba(41,214,163,.33)}
    .btn-primary:active{transform:translateY(0) scale(.98)}
    .btn-ghost{
      border-color:rgba(255,255,255,.18);
      color:var(--text);
      background:rgba(255,255,255,.06);
    }
    .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:rgba(41,214,163,.42)}
    .btn-light{
      color:var(--text-dark);
      background:#fff;
      border-color:var(--border-light);
      box-shadow:var(--shadow-soft);
    }
    .btn-light:hover{border-color:rgba(41,214,163,.55);transform:translateY(-2px)}
    .btn:focus-visible,
    .nav-link:focus-visible,
    .menu-toggle:focus-visible,
    .faq-question:focus-visible,
    input:focus-visible{
      outline:3px solid rgba(41,214,163,.42);
      outline-offset:3px;
    }
    .site-header{
      position:fixed;
      inset:0 0 auto;
      z-index:50;
      height:var(--header-h);
      display:flex;
      align-items:center;
      background:rgba(14,17,22,.76);
      backdrop-filter:saturate(130%) blur(14px);
      border-bottom:1px solid rgba(255,255,255,.08);
      transition:background var(--ease),box-shadow var(--ease),height var(--ease);
    }
    .site-header.is-scrolled{
      background:rgba(14,17,22,.96);
      box-shadow:0 10px 28px rgba(0,0,0,.22);
    }
    .nav-wrap{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
    }
    .logo{
      display:inline-flex;
      align-items:center;
      gap:10px;
      color:#fff;
      font-weight:900;
      letter-spacing:-.03em;
      min-width:max-content;
    }
    .logo-mark{
      width:38px;
      height:38px;
      border-radius:14px;
      background:linear-gradient(135deg,rgba(41,214,163,1),rgba(255,138,76,.96));
      position:relative;
      box-shadow:0 12px 28px rgba(41,214,163,.20);
    }
    .logo-mark:after{
      content:"";
      position:absolute;
      left:15px;
      top:11px;
      border-left:12px solid #08110f;
      border-top:8px solid transparent;
      border-bottom:8px solid transparent;
    }
    .logo-text{font-size:18px}
    .nav-menu{
      display:flex;
      align-items:center;
      gap:6px;
    }
    .nav-link{
      color:rgba(244,247,250,.82);
      padding:10px 14px;
      border-radius:999px;
      font-size:14px;
      font-weight:700;
      transition:background var(--ease),color var(--ease);
    }
    .nav-link:hover,
    .nav-link.active{
      color:#fff;
      background:rgba(255,255,255,.10);
    }
    .nav-cta{padding:10px 16px;min-height:42px}
    .menu-toggle{
      display:none;
      width:44px;
      height:44px;
      border-radius:14px;
      border:1px solid rgba(255,255,255,.16);
      background:rgba(255,255,255,.06);
      color:#fff;
      align-items:center;
      justify-content:center;
    }
    .menu-toggle span,
    .menu-toggle span:before,
    .menu-toggle span:after{
      display:block;
      width:18px;
      height:2px;
      background:#fff;
      border-radius:99px;
      position:relative;
      transition:transform var(--ease),opacity var(--ease);
    }
    .menu-toggle span:before,
    .menu-toggle span:after{
      content:"";
      position:absolute;
      left:0;
    }
    .menu-toggle span:before{top:-6px}
    .menu-toggle span:after{top:6px}
    .menu-toggle.is-open span{background:transparent}
    .menu-toggle.is-open span:before{transform:translateY(6px) rotate(45deg)}
    .menu-toggle.is-open span:after{transform:translateY(-6px) rotate(-45deg)}
    .hero{
      position:relative;
      min-height:760px;
      padding:calc(var(--header-h) + 78px) 0 72px;
      color:var(--text);
      overflow:hidden;
      background:
        radial-gradient(circle at 18% 24%,rgba(41,214,163,.24),transparent 30%),
        radial-gradient(circle at 88% 18%,rgba(255,138,76,.18),transparent 28%),
        linear-gradient(135deg,rgba(14,17,22,.94),rgba(18,23,34,.78)),
        url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    }
    .hero:before{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg,rgba(14,17,22,.10),rgba(14,17,22,.94));
      pointer-events:none;
    }
    .hero:after{
      content:"";
      position:absolute;
      right:-160px;
      top:140px;
      width:460px;
      height:460px;
      border:1px solid rgba(255,255,255,.08);
      border-radius:50%;
      box-shadow:inset 0 0 80px rgba(41,214,163,.12);
    }
    .hero-inner{
      position:relative;
      z-index:1;
      display:grid;
      grid-template-columns:minmax(0,1.02fr) minmax(360px,.78fr);
      gap:54px;
      align-items:center;
    }
    .hero-copy{max-width:710px}
    .hero h1{
      margin:18px 0 20px;
      font-size:clamp(34px,5vw,58px);
      line-height:1.12;
      letter-spacing:-.045em;
      max-width:720px;
    }
    .hero-subtitle{
      margin:0;
      max-width:690px;
      color:rgba(244,247,250,.78);
      font-size:18px;
      line-height:1.9;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      margin-top:32px;
    }
    .trust-strip{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:34px;
    }
    .trust-item{
      display:inline-flex;
      align-items:center;
      gap:9px;
      padding:10px 13px;
      border:1px solid rgba(255,255,255,.11);
      background:rgba(255,255,255,.06);
      border-radius:999px;
      color:rgba(244,247,250,.82);
      font-size:14px;
    }
    .hero-panel{
      position:relative;
      border:1px solid rgba(255,255,255,.13);
      border-radius:32px;
      padding:16px;
      background:linear-gradient(180deg,rgba(255,255,255,.12),rgba(255,255,255,.05));
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .hero-panel:before{
      content:"";
      position:absolute;
      inset:auto -30px -60px auto;
      width:180px;
      height:180px;
      background:rgba(41,214,163,.20);
      filter:blur(32px);
      border-radius:50%;
    }
    .media-card{
      position:relative;
      overflow:hidden;
      border-radius:24px;
      min-height:430px;
      background:#111;
    }
    .media-card img{
      width:100%;
      height:430px;
      object-fit:cover;
      opacity:.78;
    }
    .media-overlay{
      position:absolute;
      inset:0;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      padding:20px;
      background:linear-gradient(180deg,rgba(0,0,0,.22),rgba(0,0,0,.72));
    }
    .media-top{
      display:flex;
      justify-content:space-between;
      gap:12px;
      align-items:center;
    }
    .status-pill{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 11px;
      border-radius:999px;
      background:rgba(12,18,24,.74);
      color:#eafdf7;
      font-size:13px;
      border:1px solid rgba(255,255,255,.14);
    }
    .play-symbol{
      width:76px;
      height:76px;
      border-radius:50%;
      margin:auto;
      display:grid;
      place-items:center;
      background:rgba(41,214,163,.92);
      box-shadow:0 0 0 12px rgba(41,214,163,.13),0 22px 48px rgba(0,0,0,.34);
    }
    .play-symbol:before{
      content:"";
      margin-left:5px;
      border-left:22px solid #07120f;
      border-top:14px solid transparent;
      border-bottom:14px solid transparent;
    }
    .media-bottom h2{
      margin:0 0 12px;
      font-size:24px;
      line-height:1.28;
    }
    .progress{
      height:8px;
      border-radius:99px;
      background:rgba(255,255,255,.18);
      overflow:hidden;
    }
    .progress span{
      display:block;
      width:62%;
      height:100%;
      border-radius:inherit;
      background:linear-gradient(90deg,var(--primary),var(--accent));
    }
    .floating-note{
      position:absolute;
      right:0;
      bottom:38px;
      transform:translateX(38px);
      width:210px;
      padding:16px;
      border-radius:20px;
      background:#fff;
      color:var(--text-dark);
      box-shadow:var(--shadow);
      border:1px solid rgba(255,255,255,.22);
    }
    .floating-note strong{display:block;font-size:15px;margin-bottom:5px}
    .floating-note p{margin:0;color:var(--muted-dark);font-size:13px;line-height:1.6}
    .quick{
      background:#fff;
      position:relative;
    }
    .browse-layout{
      display:grid;
      grid-template-columns:.72fr 1fr;
      gap:34px;
      align-items:stretch;
    }
    .browse-intro{
      border-radius:var(--radius-xl);
      padding:34px;
      background:linear-gradient(145deg,#111722,#1d2634);
      color:var(--text);
      min-height:100%;
      position:relative;
      overflow:hidden;
    }
    .browse-intro:after{
      content:"";
      position:absolute;
      width:230px;
      height:230px;
      right:-80px;
      bottom:-90px;
      border-radius:50%;
      background:radial-gradient(circle,rgba(41,214,163,.28),transparent 68%);
    }
    .browse-intro h2{font-size:32px;line-height:1.2;margin:14px 0}
    .browse-intro p{color:rgba(244,247,250,.76);margin:0}
    .mini-search{
      margin-top:28px;
      display:flex;
      gap:10px;
      padding:8px;
      border-radius:999px;
      background:rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.12);
    }
    .mini-search label{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
    .mini-search input{
      min-width:0;
      flex:1;
      border:0;
      outline:0;
      color:#fff;
      background:transparent;
      padding:0 10px;
    }
    .mini-search input::placeholder{color:rgba(244,247,250,.48)}
    .mini-search button{
      border:0;
      border-radius:999px;
      background:var(--primary);
      color:#07120f;
      font-weight:900;
      padding:9px 15px;
      transition:transform var(--ease),background var(--ease);
    }
    .mini-search button:hover{background:#49e2b7;transform:translateY(-1px)}
    .flow-list{
      display:grid;
      gap:14px;
    }
    .flow-item{
      display:grid;
      grid-template-columns:56px 1fr auto;
      gap:18px;
      align-items:center;
      padding:20px;
      border-radius:22px;
      background:#fff;
      border:1px solid var(--border-light);
      box-shadow:0 10px 26px rgba(16,24,40,.05);
      transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
    }
    .flow-item:hover{
      transform:translateY(-4px);
      border-color:rgba(41,214,163,.46);
      box-shadow:0 18px 36px rgba(16,24,40,.10);
    }
    .flow-icon{
      width:56px;
      height:56px;
      border-radius:18px;
      display:grid;
      place-items:center;
      background:rgba(41,214,163,.12);
      color:#087a59;
      font-weight:900;
      font-size:22px;
    }
    .flow-item h3{margin:0 0 4px;font-size:19px}
    .flow-item p{margin:0;color:var(--muted-dark);font-size:14px}
    .flow-arrow{
      width:34px;
      height:34px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:#f2f4f7;
      color:#475467;
      transition:transform var(--ease),background var(--ease),color var(--ease);
    }
    .flow-item:hover .flow-arrow{transform:translateX(4px);background:var(--primary);color:#07120f}
    .visual-band{
      background:linear-gradient(180deg,#fff 0%,#f2f5f6 100%);
      padding:0 0 82px;
    }
    .band-card{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:0;
      overflow:hidden;
      border-radius:32px;
      border:1px solid var(--border-light);
      background:#fff;
      box-shadow:var(--shadow-soft);
    }
    .band-image{position:relative;min-height:420px;background:#121722}
    .band-image img{width:100%;height:100%;object-fit:cover}
    .band-image:after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(90deg,rgba(14,17,22,.06),rgba(14,17,22,.58));
    }
    .band-content{
      padding:44px;
      display:flex;
      flex-direction:column;
      justify-content:center;
    }
    .band-content h2{font-size:34px;line-height:1.22;margin:12px 0 16px}
    .band-content p{margin:0;color:var(--muted-dark)}
    .pill-grid{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:24px;
    }
    .pill{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:9px 12px;
      border-radius:999px;
      background:#f3f6f6;
      color:#344054;
      border:1px solid #e8eeee;
      font-size:13px;
      font-weight:800;
    }
    .updates{
      background:#0e1116;
      color:var(--text);
      position:relative;
      overflow:hidden;
    }
    .updates:before{
      content:"";
      position:absolute;
      left:-160px;
      top:20%;
      width:420px;
      height:420px;
      border-radius:50%;
      background:radial-gradient(circle,rgba(41,214,163,.18),transparent 68%);
    }
    .updates .container{position:relative;z-index:1}
    .updates .section-desc{color:rgba(244,247,250,.66)}
    .updates-grid{
      display:grid;
      grid-template-columns:1.02fr .98fr;
      gap:22px;
      align-items:start;
    }
    .cms-feature,
    .cms-list-card,
    .empty-state{
      border:1px solid rgba(255,255,255,.11);
      background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.045));
      border-radius:var(--radius-xl);
      box-shadow:0 18px 46px rgba(0,0,0,.18);
    }
    .cms-feature{
      overflow:hidden;
      min-height:100%;
      transition:transform var(--ease),border-color var(--ease);
    }
    .cms-feature:hover{transform:translateY(-5px);border-color:rgba(41,214,163,.42)}
    .cms-cover{
      aspect-ratio:16/9;
      overflow:hidden;
      background:#222b38;
    }
    .cms-cover img{width:100%;height:100%;object-fit:cover;transition:transform 420ms ease}
    .cms-feature:hover .cms-cover img{transform:scale(1.04)}
    .cms-body{padding:24px}
    .meta-row{
      display:flex;
      flex-wrap:wrap;
      gap:9px;
      align-items:center;
      margin-bottom:12px;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      border-radius:999px;
      padding:6px 10px;
      font-size:12px;
      font-weight:800;
      color:#dffcf3;
      background:rgba(41,214,163,.12);
      border:1px solid rgba(41,214,163,.22);
    }
    .time{
      font-size:12px;
      color:rgba(244,247,250,.56);
    }
    .cms-title{
      margin:0 0 10px;
      font-size:24px;
      line-height:1.32;
    }
    .cms-title a{transition:color var(--ease)}
    .cms-feature:hover .cms-title a,
    .cms-list-card:hover .cms-title a{color:var(--primary)}
    .cms-summary{
      margin:0 0 18px;
      color:rgba(244,247,250,.68);
      display:-webkit-box;
      -webkit-line-clamp:3;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }
    .read-link{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:#bdf8e7;
      font-weight:900;
      transition:gap var(--ease),color var(--ease);
    }
    .read-link:hover{gap:12px;color:#fff}
    .side-list{display:grid;gap:14px}
    .cms-list-card{
      padding:19px;
      transition:transform var(--ease),border-color var(--ease),background var(--ease);
    }
    .cms-list-card:hover{
      transform:translateY(-3px);
      border-color:rgba(41,214,163,.38);
      background:rgba(255,255,255,.075);
    }
    .cms-list-card .cms-title{font-size:18px;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .cms-list-card .cms-summary{font-size:14px;-webkit-line-clamp:2;margin-bottom:12px}
    .empty-state{
      grid-column:1/-1;
      padding:36px;
      text-align:center;
      color:rgba(244,247,250,.68);
    }
    .empty-icon{
      width:64px;
      height:64px;
      margin:0 auto 14px;
      border-radius:22px;
      display:grid;
      place-items:center;
      background:rgba(41,214,163,.12);
      border:1px solid rgba(41,214,163,.22);
      color:var(--primary);
      font-size:28px;
    }
    .experience{
      background:#f6f7f8;
    }
    .experience-layout{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:36px;
      align-items:start;
    }
    .sticky-note{
      position:sticky;
      top:102px;
      padding:32px;
      border-radius:var(--radius-xl);
      background:#fff;
      border:1px solid var(--border-light);
      box-shadow:var(--shadow-soft);
    }
    .sticky-note h2{font-size:34px;line-height:1.2;margin:12px 0 14px}
    .sticky-note p{margin:0;color:var(--muted-dark)}
    .feature-stack{display:grid;gap:16px}
    .feature-card{
      display:grid;
      grid-template-columns:92px 1fr;
      gap:18px;
      padding:18px;
      border-radius:24px;
      background:#fff;
      border:1px solid var(--border-light);
      box-shadow:0 10px 22px rgba(16,24,40,.05);
      transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
    }
    .feature-card:hover{
      transform:translateY(-4px);
      border-color:rgba(41,214,163,.38);
      box-shadow:0 18px 34px rgba(16,24,40,.10);
    }
    .feature-thumb{
      width:92px;
      height:92px;
      border-radius:20px;
      overflow:hidden;
      background:#dde3e8;
    }
    .feature-thumb img{width:100%;height:100%;object-fit:cover}
    .feature-card h3{margin:2px 0 6px;font-size:20px}
    .feature-card p{margin:0;color:var(--muted-dark);font-size:15px}
    .steps{
      background:#fff;
      overflow:hidden;
    }
    .steps-track{
      position:relative;
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:16px;
      margin-top:8px;
    }
    .steps-track:before{
      content:"";
      position:absolute;
      left:8%;
      right:8%;
      top:36px;
      height:2px;
      background:linear-gradient(90deg,rgba(41,214,163,.12),rgba(41,214,163,.72),rgba(255,138,76,.24));
    }
    .step-card{
      position:relative;
      z-index:1;
      padding:20px;
      border-radius:24px;
      border:1px solid var(--border-light);
      background:#fff;
      box-shadow:0 12px 28px rgba(16,24,40,.06);
      transition:transform var(--ease),border-color var(--ease);
    }
    .step-card:hover{transform:translateY(-4px);border-color:rgba(255,138,76,.36)}
    .step-num{
      width:72px;
      height:72px;
      border-radius:24px;
      display:grid;
      place-items:center;
      background:#0e1116;
      color:var(--primary);
      font-size:24px;
      font-weight:900;
      box-shadow:0 14px 32px rgba(14,17,22,.16);
      margin-bottom:18px;
    }
    .step-card h3{margin:0 0 8px;font-size:20px}
    .step-card p{margin:0;color:var(--muted-dark);font-size:15px}
    .safe{
      background:linear-gradient(145deg,#111722,#161f2d);
      color:var(--text);
      padding:74px 0;
    }
    .safe-card{
      display:grid;
      grid-template-columns:1fr .82fr;
      gap:30px;
      align-items:center;
      padding:32px;
      border-radius:32px;
      border:1px solid rgba(255,255,255,.11);
      background:rgba(255,255,255,.055);
    }
    .safe-card h2{font-size:34px;line-height:1.22;margin:12px 0 14px}
    .safe-card p{color:rgba(244,247,250,.72);margin:0}
    .safe-list{
      display:grid;
      gap:12px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .safe-list li{
      padding:15px 16px;
      border-radius:18px;
      background:rgba(255,255,255,.065);
      border:1px solid rgba(255,255,255,.09);
      color:rgba(244,247,250,.82);
    }
    .safe-list strong{color:#fff}
    .faq{
      background:#f6f7f8;
    }
    .faq-layout{
      display:grid;
      grid-template-columns:.72fr 1fr;
      gap:34px;
    }
    .faq-intro{
      padding:30px;
      border-radius:var(--radius-xl);
      background:#0e1116;
      color:var(--text);
      min-height:320px;
      background-image:
        linear-gradient(145deg,rgba(14,17,22,.90),rgba(14,17,22,.78)),
        url('/assets/images/backpic/back-2.jpg');
      background-size:cover;
      background-position:center;
    }
    .faq-intro h2{font-size:34px;line-height:1.22;margin:12px 0}
    .faq-intro p{color:rgba(244,247,250,.72);margin:0}
    .faq-list{display:grid;gap:12px}
    .faq-item{
      border:1px solid var(--border-light);
      border-radius:20px;
      background:#fff;
      overflow:hidden;
      box-shadow:0 8px 22px rgba(16,24,40,.05);
    }
    .faq-question{
      width:100%;
      border:0;
      background:transparent;
      color:var(--text-dark);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:19px 20px;
      text-align:left;
      font-weight:900;
      transition:background var(--ease);
    }
    .faq-question:hover{background:#f7faf9}
    .faq-icon{
      width:28px;
      height:28px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:rgba(41,214,163,.12);
      color:#087a59;
      flex:0 0 auto;
      transition:transform var(--ease),background var(--ease);
    }
    .faq-item.is-open .faq-icon{transform:rotate(45deg);background:rgba(255,138,76,.15);color:var(--accent-2)}
    .faq-answer{
      max-height:0;
      overflow:hidden;
      transition:max-height 260ms ease;
    }
    .faq-answer p{
      margin:0;
      padding:0 20px 20px;
      color:var(--muted-dark);
    }
    .cta{
      background:#fff;
      padding:0 0 92px;
    }
    .cta-box{
      position:relative;
      overflow:hidden;
      border-radius:34px;
      padding:44px;
      color:var(--text);
      background:
        radial-gradient(circle at 18% 20%,rgba(41,214,163,.24),transparent 30%),
        radial-gradient(circle at 82% 64%,rgba(255,138,76,.17),transparent 34%),
        linear-gradient(135deg,#0e1116,#17202d);
      border:1px solid rgba(255,255,255,.10);
      display:grid;
      grid-template-columns:1fr auto;
      gap:24px;
      align-items:center;
    }
    .cta-box h2{font-size:34px;line-height:1.22;margin:0 0 10px}
    .cta-box p{margin:0;color:rgba(244,247,250,.72);max-width:690px}
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
    .site-footer{
      background:#111722;
      color:var(--text);
      padding:56px 0 26px;
      border-top:1px solid rgba(255,255,255,.08);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr .9fr;
      gap:34px;
      padding-bottom:34px;
    }
    .footer-brand p{margin:16px 0 0;color:rgba(244,247,250,.66);max-width:440px}
    .footer-title{
      margin:0 0 14px;
      color:#fff;
      font-size:15px;
      font-weight:900;
    }
    .footer-links{
      display:grid;
      gap:10px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .footer-links a{
      color:rgba(244,247,250,.68);
      transition:color var(--ease),transform var(--ease);
      display:inline-block;
    }
    .footer-links a:hover{color:var(--primary);transform:translateX(3px)}
    .footer-note{
      color:rgba(244,247,250,.66);
      margin:0;
    }
    .copyright{
      border-top:1px solid rgba(255,255,255,.08);
      padding-top:20px;
      color:rgba(244,247,250,.50);
      font-size:13px;
      display:flex;
      justify-content:space-between;
      gap:18px;
      flex-wrap:wrap;
    }
    @media (max-width:1080px){
      .hero-inner,.browse-layout,.band-card,.experience-layout,.faq-layout,.safe-card{grid-template-columns:1fr}
      .hero{min-height:auto}
      .floating-note{right:18px;transform:none}
      .updates-grid{grid-template-columns:1fr}
      .steps-track{grid-template-columns:repeat(2,1fr)}
      .steps-track:before{display:none}
      .sticky-note{position:relative;top:auto}
      .band-image{min-height:320px}
      .section-head{align-items:flex-start;flex-direction:column}
    }
    @media (max-width:820px){
      :root{--header-h:64px}
      .container{width:min(100% - 36px,var(--container))}
      .menu-toggle{display:flex}
      .nav-menu{
        position:absolute;
        top:calc(100% + 10px);
        left:18px;
        right:18px;
        display:none;
        flex-direction:column;
        align-items:stretch;
        padding:12px;
        border-radius:22px;
        background:rgba(14,17,22,.98);
        border:1px solid rgba(255,255,255,.12);
        box-shadow:var(--shadow);
      }
      .nav-menu.is-open{display:flex}
      .nav-link{padding:13px 14px}
      .nav-cta{justify-content:center;margin-top:4px}
      .hero{padding-top:118px}
      .hero-panel{max-width:560px}
      .media-card,.media-card img{min-height:360px;height:360px}
      .flow-item{grid-template-columns:48px 1fr;padding:17px}
      .flow-icon{width:48px;height:48px;border-radius:16px}
      .flow-arrow{display:none}
      .footer-grid{grid-template-columns:1fr}
      .cta-box{grid-template-columns:1fr;padding:32px}
      .cta-actions{justify-content:flex-start}
      .feature-card{grid-template-columns:76px 1fr}
      .feature-thumb{width:76px;height:76px}
    }
    @media (max-width:560px){
      .container{width:min(100% - 32px,var(--container))}
      .section{padding:62px 0}
      .section-tight{padding:54px 0}
      .logo-text{font-size:15px}
      .logo-mark{width:34px;height:34px;border-radius:12px}
      .hero h1{font-size:34px}
      .hero-subtitle{font-size:16px}
      .hero-actions,.cta-actions{display:grid;grid-template-columns:1fr;width:100%}
      .btn{width:100%}
      .trust-item{width:100%;justify-content:flex-start}
      .media-card,.media-card img{min-height:310px;height:310px}
      .floating-note{position:relative;right:auto;bottom:auto;margin:14px 0 0;width:auto}
      .browse-intro,.band-content,.safe-card{padding:24px}
      .mini-search{border-radius:18px;flex-direction:column}
      .mini-search button{width:100%}
      .steps-track{grid-template-columns:1fr}
      .feature-card{grid-template-columns:1fr}
      .feature-thumb{width:100%;height:160px}
      .copyright{display:block}
    }

/* roulang page: article */
:root{
      --bg:#0e1116;
      --bg-2:#121722;
      --surface:#171d28;
      --surface-2:#202837;
      --light:#f6f7f8;
      --light-2:#ffffff;
      --text:#f4f7fa;
      --text-dark:#1a1d21;
      --muted:#8e98a8;
      --muted-dark:#667085;
      --primary:#29d6a3;
      --primary-2:#22c55e;
      --accent:#ff8a4c;
      --accent-2:#f97316;
      --border:rgba(255,255,255,.11);
      --border-light:#e6e8ec;
      --shadow:0 18px 48px rgba(0,0,0,.24);
      --shadow-soft:0 14px 32px rgba(16,24,40,.10);
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:16px;
      --radius-sm:12px;
      --container:1200px;
      --header-h:76px;
      --ease:220ms ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;scroll-padding-top:96px}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text-dark);
      background:var(--light);
      line-height:1.72;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    button{cursor:pointer}
    .container{width:min(100% - 48px,var(--container));margin-inline:auto}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:46px;
      padding:12px 20px;
      border-radius:999px;
      border:1px solid transparent;
      font-weight:800;
      transition:transform var(--ease),background var(--ease),border-color var(--ease),box-shadow var(--ease),color var(--ease);
      white-space:nowrap;
    }
    .btn-primary{
      background:linear-gradient(135deg,var(--primary),var(--primary-2));
      color:#07120f;
      box-shadow:0 14px 34px rgba(41,214,163,.27);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 42px rgba(41,214,163,.33)}
    .btn-primary:active{transform:translateY(0) scale(.98)}
    .btn-ghost{
      border-color:rgba(255,255,255,.18);
      color:var(--text);
      background:rgba(255,255,255,.06);
    }
    .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:rgba(41,214,163,.42)}
    .btn-light{color:var(--text-dark);background:#fff;border-color:var(--border-light);box-shadow:var(--shadow-soft)}
    .btn-light:hover{border-color:rgba(41,214,163,.55);transform:translateY(-2px)}
    .btn:focus-visible,.nav-link:focus-visible,.menu-toggle:focus-visible,.article-link:focus-visible{
      outline:3px solid rgba(41,214,163,.42);
      outline-offset:3px;
    }
    .site-header{
      position:fixed;
      inset:0 0 auto;
      z-index:50;
      height:var(--header-h);
      display:flex;
      align-items:center;
      background:rgba(14,17,22,.76);
      backdrop-filter:saturate(130%) blur(14px);
      border-bottom:1px solid rgba(255,255,255,.08);
      transition:background var(--ease),box-shadow var(--ease);
    }
    .site-header.is-scrolled{background:rgba(14,17,22,.96);box-shadow:0 10px 28px rgba(0,0,0,.22)}
    .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px}
    .logo{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:900;letter-spacing:-.03em;min-width:max-content}
    .logo-mark{
      width:38px;height:38px;border-radius:14px;
      background:linear-gradient(135deg,var(--primary),rgba(255,138,76,.96));
      position:relative;box-shadow:0 12px 28px rgba(41,214,163,.20);
    }
    .logo-mark:after{
      content:"";position:absolute;left:15px;top:11px;
      border-left:12px solid #08110f;border-top:8px solid transparent;border-bottom:8px solid transparent;
    }
    .logo-text{font-size:18px}
    .nav-menu{display:flex;align-items:center;gap:6px}
    .nav-link{
      color:rgba(244,247,250,.82);padding:10px 14px;border-radius:999px;font-size:14px;font-weight:700;
      transition:background var(--ease),color var(--ease);
    }
    .nav-link:hover,.nav-link.active{color:#fff;background:rgba(255,255,255,.10)}
    .nav-cta{padding:10px 16px;min-height:42px}
    .menu-toggle{
      display:none;width:44px;height:44px;border-radius:14px;border:1px solid rgba(255,255,255,.16);
      background:rgba(255,255,255,.06);color:#fff;align-items:center;justify-content:center;
    }
    .menu-toggle span,.menu-toggle span:before,.menu-toggle span:after{
      display:block;width:18px;height:2px;background:#fff;border-radius:99px;position:relative;transition:transform var(--ease),opacity var(--ease);
    }
    .menu-toggle span:before,.menu-toggle span:after{content:"";position:absolute;left:0}
    .menu-toggle span:before{top:-6px}.menu-toggle span:after{top:6px}
    .menu-toggle.is-open span{background:transparent}
    .menu-toggle.is-open span:before{transform:translateY(6px) rotate(45deg)}
    .menu-toggle.is-open span:after{transform:translateY(-6px) rotate(-45deg)}
    .article-hero{
      position:relative;
      padding:150px 0 82px;
      color:var(--text);
      background:
        linear-gradient(110deg,rgba(14,17,22,.98) 22%,rgba(14,17,22,.83) 65%,rgba(14,17,22,.72)),
        url("/assets/images/backpic/back-2.jpg") center/cover;
      overflow:hidden;
    }
    .article-hero:after{
      content:"";position:absolute;inset:auto 0 0;height:130px;
      background:linear-gradient(transparent,var(--light));pointer-events:none;
    }
    .breadcrumb{display:flex;flex-wrap:wrap;gap:10px;align-items:center;color:#a8b2c0;font-size:14px;margin-bottom:30px}
    .breadcrumb a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:4px}
    .breadcrumb-separator{color:#667085}
    .article-heading{position:relative;z-index:1;max-width:850px}
    .article-kicker{
      display:inline-flex;align-items:center;gap:8px;color:#bdf8e7;background:rgba(41,214,163,.11);
      border:1px solid rgba(41,214,163,.25);border-radius:999px;padding:7px 13px;font-size:13px;font-weight:800;
    }
    .article-kicker:before{content:"";width:7px;height:7px;background:var(--primary);border-radius:50%;box-shadow:0 0 0 5px rgba(41,214,163,.12)}
    h1{font-size:clamp(34px,5vw,58px);line-height:1.18;letter-spacing:-.04em;margin:22px 0 20px;font-weight:850}
    .article-lead{max-width:760px;color:#c2cad5;font-size:18px;margin:0}
    .article-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;color:#aab4c1;font-size:14px}
    .meta-item{padding:7px 12px;border:1px solid rgba(255,255,255,.13);border-radius:999px;background:rgba(255,255,255,.06)}
    .reading-area{padding:78px 0 96px;background:var(--light)}
    .reading-layout{display:grid;grid-template-columns:minmax(0,820px) 280px;gap:52px;align-items:start;justify-content:center}
    .article-cover{width:100%;aspect-ratio:16/8;border-radius:var(--radius-lg);object-fit:cover;margin-bottom:38px;box-shadow:var(--shadow-soft)}
    .article-body{
      font-size:17px;line-height:1.9;color:#343a43;
      overflow-wrap:anywhere;
    }
    .article-body h2{font-size:30px;line-height:1.3;color:var(--text-dark);margin:42px 0 16px;font-weight:820}
    .article-body h3{font-size:22px;line-height:1.4;color:var(--text-dark);margin:30px 0 12px;font-weight:800}
    .article-body p{margin:0 0 22px}
    .article-body ul,.article-body ol{padding-left:1.5em;margin:0 0 24px}
    .article-body li{margin:7px 0}
    .article-body a{color:#087a59;text-decoration:underline;text-decoration-color:rgba(8,122,89,.35);text-underline-offset:4px}
    .article-body a:hover{color:var(--accent-2);text-decoration-color:currentColor}
    .article-body blockquote{
      margin:30px 0;padding:20px 24px;border-left:4px solid var(--primary);
      background:#edf9f5;color:#3b6659;border-radius:0 var(--radius-sm) var(--radius-sm) 0;
    }
    .article-body figure{margin:30px 0}
    .article-body figure img{border-radius:var(--radius-md);width:100%;object-fit:cover}
    .article-body figcaption{margin-top:9px;text-align:left;color:var(--muted-dark);font-size:13px}
    .article-body table{width:100%;border-collapse:collapse;margin:28px 0;font-size:15px;background:#fff;border:1px solid var(--border-light);border-radius:12px;overflow:hidden}
    .article-body th,.article-body td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border-light)}
    .article-body th{background:#f0f5f3;color:#17664f;font-weight:800}
    .article-body code{padding:3px 7px;border-radius:6px;background:#e9edf0;color:#b34d1f;font-size:.9em}
    .article-empty{padding:42px;border:1px dashed #b8c4c0;border-radius:var(--radius-lg);background:#fff;text-align:center}
    .article-empty h2{margin:0 0 10px;font-size:26px}
    .article-empty p{margin:0 0 22px;color:var(--muted-dark)}
    .side-stack{position:sticky;top:100px;display:grid;gap:16px}
    .side-card{padding:22px;border:1px solid var(--border-light);border-radius:var(--radius-md);background:#fff;box-shadow:var(--shadow-soft)}
    .side-card h2{font-size:18px;line-height:1.4;margin:0 0 12px}
    .side-card p{font-size:14px;color:var(--muted-dark);margin:0 0 16px}
    .side-line{height:1px;background:var(--border-light);margin:18px 0}
    .article-link{display:inline-flex;align-items:center;gap:8px;color:#087a59;font-weight:800;font-size:14px}
    .article-link:after{content:"→";transition:transform var(--ease)}
    .article-link:hover{color:var(--accent-2)}
    .article-link:hover:after{transform:translateX(4px)}
    .return-band{padding:0 0 88px;background:var(--light)}
    .return-panel{
      display:flex;align-items:center;justify-content:space-between;gap:24px;padding:30px 34px;
      color:var(--text);background:var(--bg-2);border-radius:var(--radius-lg);box-shadow:var(--shadow);
    }
    .return-panel h2{font-size:24px;margin:0 0 6px}.return-panel p{margin:0;color:var(--muted)}
    .site-footer{padding:64px 0 24px;background:var(--bg);color:var(--text)}
    .footer-grid{display:grid;grid-template-columns:1.5fr .8fr 1fr;gap:60px;padding-bottom:46px}
    .footer-brand p,.footer-note{max-width:390px;color:var(--muted);font-size:14px;margin:18px 0 0}
    .footer-title{font-size:15px;margin:4px 0 16px;color:#fff}
    .footer-links{padding:0;margin:0;list-style:none;display:grid;gap:9px;color:var(--muted);font-size:14px}
    .footer-links a{transition:color var(--ease)}.footer-links a:hover{color:var(--primary)}
    .copyright{display:flex;justify-content:space-between;gap:20px;padding-top:22px;border-top:1px solid var(--border);color:#707b8b;font-size:12px}
    @media (max-width:900px){
      .reading-layout{grid-template-columns:minmax(0,820px)}
      .side-stack{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}
      .footer-grid{gap:32px}
    }
    @media (max-width:767px){
      :root{--header-h:64px}
      .container{width:min(100% - 36px,var(--container))}
      .site-header{height:var(--header-h)}
      .nav-menu{
        display:none;position:absolute;top:calc(100% + 1px);left:0;right:0;padding:12px 18px 18px;
        flex-direction:column;align-items:stretch;background:rgba(14,17,22,.98);border-bottom:1px solid var(--border);
      }
      .nav-menu.is-open{display:flex}.nav-link,.nav-cta{width:100%;min-height:44px;text-align:center}
      .menu-toggle{display:flex}
      .article-hero{padding:118px 0 68px}
      h1{font-size:36px}
      .article-lead{font-size:16px}
      .reading-area{padding:54px 0 68px}
      .article-cover{margin-bottom:28px}
      .article-body{font-size:16px}
      .article-body h2{font-size:26px}
      .side-stack{grid-template-columns:1fr}
      .return-band{padding-bottom:64px}
      .return-panel{align-items:flex-start;flex-direction:column;padding:26px}
      .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:34px}
      .copyright{flex-direction:column;gap:7px}
    }
    @media (max-width:480px){
      .container{width:min(100% - 32px,var(--container))}
      h1{font-size:31px}
      .article-meta{gap:7px;font-size:12px}
      .meta-item{padding:6px 9px}
      .article-body table{display:block;overflow-x:auto;white-space:nowrap}
    }

/* 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}