/* roulang page: index */
:root{
    --c-primary:#1E63E9;
    --c-primary-dark:#1548B0;
    --c-primary-soft:#EAF1FE;
    --c-accent:#12B5A5;
    --c-accent-soft:#E4F7F4;
    --c-cta:#FF7A45;
    --c-cta-dark:#F2652C;
    --c-bg:#F5F7FB;
    --c-card:#FFFFFF;
    --c-alt:#EEF3FC;
    --c-line:#E3E9F3;
    --c-text:#0F172A;
    --c-text-2:#56657D;
    --c-text-3:#8A97AC;
    --r-card:16px;
    --r-btn:10px;
    --sh-card:0 1px 2px rgba(15,23,42,.04), 0 10px 24px -14px rgba(30,99,233,.18);
    --sh-card-hover:0 2px 4px rgba(15,23,42,.05), 0 18px 34px -16px rgba(30,99,233,.30);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.85;
    color:var(--c-text);
    background:var(--c-bg);
    -webkit-font-smoothing:antialiased;
    text-align:left;
  }
  h1,h2,h3,h4{margin:0;color:var(--c-text);letter-spacing:-.3px}
  p{margin:0 0 1.1em}
  p:last-child{margin-bottom:0}
  a{color:var(--c-primary);text-decoration:none;transition:color .18s ease}
  a:hover{color:var(--c-primary-dark)}
  img{max-width:100%;display:block}
  button{font-family:inherit}
  ul{margin:0;padding:0;list-style:none}
  .num{font-variant-numeric:tabular-nums}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
  @media (max-width:768px){ .container{padding:0 16px} }

  .section{padding:92px 0}
  .section-alt{background:var(--c-alt)}
  @media (max-width:1024px){ .section{padding:72px 0} }
  @media (max-width:640px){ .section{padding:56px 0} }

  .section-head{margin-bottom:40px;max-width:760px}
  .section-head h2{font-size:clamp(24px,2.4vw,32px);font-weight:700;line-height:1.3;margin-bottom:12px}
  .section-head .sub{font-size:13px;color:var(--c-text-3);line-height:1.7}
  .section-head .lead{font-size:15px;color:var(--c-text-2);margin-top:10px}

  /* ---------- header / nav ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:#fff;
    border-bottom:1px solid var(--c-line);
    transition:box-shadow .22s ease;
  }
  .site-header.is-scrolled{box-shadow:0 8px 22px -16px rgba(15,23,42,.35)}
  .header-inner{
    display:flex;align-items:center;gap:20px;
    min-height:68px;flex-wrap:wrap;
  }
  .logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
  .logo-mark{
    width:34px;height:34px;border-radius:10px;
    background:linear-gradient(135deg,var(--c-primary),var(--c-accent));
    display:grid;place-items:center;color:#fff;flex:0 0 auto;
  }
  .logo-text{font-size:17px;font-weight:700;color:var(--c-text);letter-spacing:-.2px;white-space:nowrap}
  .logo:hover .logo-text{color:var(--c-primary)}
  .chip-nav{
    display:flex;align-items:center;gap:8px;
    flex:1 1 auto;justify-content:center;
    overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
    padding:6px 2px;
  }
  .chip-nav::-webkit-scrollbar{display:none}
  .chip{
    display:inline-flex;align-items:center;
    height:34px;padding:0 14px;border-radius:999px;
    font-size:13px;font-weight:500;white-space:nowrap;
    background:#F1F5FB;color:var(--c-text-2);
    transition:background .18s ease,color .18s ease;
  }
  .chip:hover{background:var(--c-primary-soft);color:var(--c-primary)}
  .chip.active{background:var(--c-primary);color:#fff}
  .chip:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
  .header-right{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto}
  .menu-btn{
    display:none;width:40px;height:40px;border-radius:10px;
    border:1px solid var(--c-line);background:#fff;color:var(--c-text-2);
    align-items:center;justify-content:center;cursor:pointer;
  }
  .menu-btn:hover{border-color:var(--c-primary);color:var(--c-primary)}
  .mobile-nav{display:none;border-top:1px solid var(--c-line);background:#fff;padding:10px 0 14px}
  .mobile-nav.open{display:block}
  .mobile-nav a{
    display:flex;align-items:center;justify-content:space-between;
    padding:12px 2px;font-size:14px;color:var(--c-text-2);
    border-bottom:1px solid var(--c-line);
  }
  .mobile-nav a:last-child{border-bottom:0}
  .mobile-nav a.active{color:var(--c-primary);font-weight:600}
  @media (max-width:1023px){
    .header-inner{gap:12px}
    .chip-nav{order:3;width:100%;justify-content:flex-start;padding-bottom:8px}
    .menu-btn{display:flex}
    .header-cta{display:none}
  }
  @media (max-width:640px){
    .header-inner{min-height:56px}
    .logo-text{font-size:16px}
    .site-header.is-scrolled .chip-nav{display:none}
  }

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 20px;border-radius:var(--r-btn);
    font-size:14px;font-weight:600;line-height:1;
    border:1px solid transparent;cursor:pointer;
    transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  }
  .btn:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
  .btn-cta{background:var(--c-cta);color:#fff}
  .btn-cta:hover{background:var(--c-cta-dark);color:#fff;transform:translateY(-1px)}
  .btn-cta:active{transform:none}
  .btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary)}
  .btn-ghost:hover{background:var(--c-primary-soft);color:var(--c-primary)}
  .btn-sm{height:40px;padding:0 16px;font-size:13px}
  .btn-lg{height:48px;padding:0 26px;font-size:15px}
  .btn[disabled],.btn.is-disabled{opacity:.6;cursor:not-allowed}
  .link-arrow{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px}
  .link-arrow span{transition:transform .18s ease}
  .link-arrow:hover span{transform:translateX(2px)}

  /* ---------- hero ---------- */
  .hero{
    position:relative;background:#fff;overflow:hidden;
    padding:72px 0 76px;
    border-bottom:1px solid var(--c-line);
  }
  .hero::before{
    content:"";position:absolute;inset:-30% -10% auto auto;
    width:760px;height:760px;border-radius:50%;
    background:radial-gradient(circle at center, rgba(30,99,233,.16), rgba(30,99,233,0) 62%);
    pointer-events:none;
  }
  .hero::after{
    content:"";position:absolute;left:-160px;bottom:-220px;
    width:520px;height:520px;border-radius:50%;
    background:radial-gradient(circle at center, rgba(18,181,165,.14), rgba(18,181,165,0) 65%);
    pointer-events:none;
  }
  .hero-inner{position:relative;z-index:2}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    height:30px;padding:0 12px;border-radius:999px;
    background:var(--c-primary-soft);color:var(--c-primary);
    font-size:13px;font-weight:600;margin-bottom:18px;
  }
  .hero h1{
    font-size:clamp(30px,4.2vw,50px);
    line-height:1.25;font-weight:700;letter-spacing:-.5px;
    margin-bottom:18px;max-width:640px;
  }
  .hero h1 em{font-style:normal;color:var(--c-primary)}
  .hero-sub{font-size:17px;line-height:1.85;color:var(--c-text-2);max-width:600px;margin-bottom:26px}
  .feat-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 20px;margin-bottom:30px;max-width:600px}
  .feat-point{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--c-text-2);line-height:1.6}
  .feat-point svg{flex:0 0 auto;margin-top:2px;color:var(--c-accent)}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px}
  .hero-note{font-size:12px;color:var(--c-text-3);line-height:1.7}
  .hero-visual{position:relative}
  .hero-frame{
    position:relative;border-radius:var(--r-card);overflow:hidden;
    aspect-ratio:4/3;background:var(--c-alt);box-shadow:var(--sh-card);
  }
  .hero-frame img{width:100%;height:100%;object-fit:cover;object-position:center}
  .hero-float{
    position:absolute;right:-8px;bottom:-24px;width:58%;
    border-radius:14px;overflow:hidden;background:#fff;
    border:1px solid var(--c-line);box-shadow:0 20px 40px -22px rgba(15,23,42,.45);
  }
  .hero-float img{width:100%;aspect-ratio:16/10;object-fit:cover}
  @media (max-width:1024px){
    .hero{padding:56px 0 64px}
    .hero-float{bottom:-16px;width:52%}
  }
  @media (max-width:640px){
    .feat-points{grid-template-columns:1fr}
    .hero-actions .btn{flex:1 1 100%}
    .hero-visual{margin-top:34px}
    .hero-float{position:static;width:100%;margin-top:14px}
  }

  /* ---------- trust bar ---------- */
  .trust-bar{background:#fff;border-bottom:1px solid var(--c-line);padding:34px 0}
  .trust-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
  .trust-item{text-align:left;padding-left:16px;border-left:3px solid var(--c-primary-soft)}
  .trust-item:nth-child(2){border-left-color:var(--c-accent)}
  .trust-item .val{font-size:30px;font-weight:700;line-height:1.1;color:var(--c-primary);letter-spacing:-.5px}
  .trust-item:nth-child(2) .val{color:var(--c-accent)}
  .trust-item .val small{font-size:14px;font-weight:600;margin-left:2px}
  .trust-item .lbl{font-size:12.5px;color:var(--c-text-3);margin-top:6px;line-height:1.6}
  @media (max-width:1024px){ .trust-grid{grid-template-columns:repeat(2,minmax(0,1fr))} }
  @media (max-width:640px){ .trust-item .val{font-size:26px} }

  /* ---------- cards ---------- */
  .card{
    background:var(--c-card);border-radius:var(--r-card);
    box-shadow:var(--sh-card);overflow:hidden;
    transition:transform .2s ease,box-shadow .2s ease;
  }
  .card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover)}
  .card-bordered{border:1px solid var(--c-line);box-shadow:none}
  .card-bordered:hover{box-shadow:var(--sh-card)}
  .chip-brand{
    display:inline-flex;align-items:center;height:24px;padding:0 10px;
    border-radius:999px;background:var(--c-primary-soft);color:var(--c-primary);
    font-size:12.5px;font-weight:600;
  }
  .chip-status{
    display:inline-flex;align-items:center;height:24px;padding:0 10px;
    border-radius:999px;background:var(--c-accent-soft);color:#0C8C80;
    font-size:12.5px;font-weight:600;
  }

  /* ---------- carousel ---------- */
  .carousel-shell{position:relative}
  .carousel-track{
    display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
    scrollbar-width:none;-ms-overflow-style:none;padding:6px 2px 18px;
  }
  .carousel-track::-webkit-scrollbar{display:none}
  .carousel-slide{
    flex:0 0 calc((100% - 40px) / 3);
    scroll-snap-align:start;
    background:#fff;border-radius:var(--r-card);overflow:hidden;
    box-shadow:var(--sh-card);
    transition:transform .2s ease,box-shadow .2s ease;
  }
  .carousel-slide:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover)}
  .carousel-slide .shot{aspect-ratio:16/9;overflow:hidden;background:var(--c-alt)}
  .carousel-slide .shot img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
  .carousel-slide:hover .shot img{transform:scale(1.02)}
  .carousel-slide .body{padding:18px 20px 22px}
  .carousel-slide h3{font-size:18px;font-weight:600;margin-bottom:8px}
  .carousel-slide p{font-size:13.5px;color:var(--c-text-2);line-height:1.75;margin:0}
  .carousel-ctrl{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:4px}
  .carousel-btns{display:flex;gap:10px}
  .icon-btn{
    width:42px;height:42px;border-radius:999px;border:1px solid var(--c-line);
    background:#fff;color:var(--c-text-2);display:grid;place-items:center;cursor:pointer;
    transition:border-color .18s ease,color .18s ease,background .18s ease;
  }
  .icon-btn:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft)}
  .icon-btn:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
  .carousel-dots{display:flex;gap:8px}
  .carousel-dot{
    width:9px;height:9px;border-radius:999px;border:0;padding:0;
    background:#CBD6EA;cursor:pointer;transition:width .2s ease,background .2s ease;
  }
  .carousel-dot.is-active{width:26px;background:var(--c-primary)}
  @media (max-width:1024px){ .carousel-slide{flex:0 0 calc((100% - 20px) / 2)} }
  @media (max-width:640px){ .carousel-slide{flex:0 0 84%} }

  /* ---------- requirement lists ---------- */
  .req-card{background:#fff;border-radius:var(--r-card);box-shadow:var(--sh-card);padding:26px 24px}
  .req-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
  .req-head h3{font-size:19px;font-weight:600}
  .req-row{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:12px 0;border-bottom:1px solid var(--c-line);
  }
  .req-row:last-child{border-bottom:0;padding-bottom:0}
  .req-row .k{font-size:13.5px;color:var(--c-text-3);flex:0 0 auto}
  .req-row .v{font-size:14px;color:var(--c-text);font-weight:600;text-align:right}

  /* ---------- testimonials ---------- */
  .review{padding:24px}
  .review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
  .avatar{
    width:42px;height:42px;border-radius:999px;flex:0 0 auto;
    display:grid;place-items:center;font-size:15px;font-weight:700;color:#fff;
    background:var(--c-primary);
  }
  .avatar.b2{background:var(--c-accent)}
  .avatar.b3{background:#E5A23C}
  .review-name{font-size:14.5px;font-weight:600}
  .review-role{font-size:12.5px;color:var(--c-text-3)}
  .review p{font-size:14px;color:var(--c-text-2);line-height:1.8;margin:0}
  .stars{display:flex;gap:3px;color:#E5A23C;margin-top:14px}

  /* ---------- download ---------- */
  .download-band{
    background:var(--c-primary-soft);border-radius:20px;
    padding:38px 34px;border:1px solid #D8E4FB;
  }
  .dl-grid{display:grid;grid-template-columns:1.4fr .9fr;gap:32px;align-items:center}
  .dl-actions{display:flex;flex-wrap:wrap;gap:12px;margin:20px 0 18px}
  .dl-meta{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
  .dl-meta div{background:#fff;border-radius:10px;padding:10px 12px;font-size:12.5px;color:var(--c-text-3)}
  .dl-meta strong{display:block;font-size:13.5px;color:var(--c-text);font-weight:600;margin-top:2px}
  .qr-card{
    background:#fff;border-radius:var(--r-card);padding:20px;text-align:center;
    box-shadow:var(--sh-card);
  }
  .qr-box{
    width:132px;height:132px;margin:0 auto 12px;border-radius:12px;
    background:var(--c-alt);display:grid;place-items:center;
  }
  .qr-card p{font-size:12.5px;color:var(--c-text-3);margin:0}
  @media (max-width:1024px){
    .dl-grid{grid-template-columns:1fr}
    .download-band{padding:28px 20px}
  }
  @media (max-width:640px){ .dl-meta{grid-template-columns:1fr} .dl-actions .btn{flex:1 1 100%} }

  /* ---------- news / cms ---------- */
  .news-feature{background:#fff;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card);
    transition:transform .2s ease,box-shadow .2s ease;height:100%;display:flex;flex-direction:column}
  .news-feature:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover)}
  .news-cover{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--c-alt)}
  .news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
  .news-feature:hover .news-cover img{transform:scale(1.02)}
  .news-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px}
  .news-title{font-size:20px;font-weight:600;line-height:1.45}
  .news-title a{color:var(--c-text)}
  .news-title a:hover{color:var(--c-primary)}
  .news-summary{font-size:14px;color:var(--c-text-2);line-height:1.8;margin:0}
  .news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;
    font-size:12.5px;color:var(--c-text-3);margin-top:auto}
  .news-mini{
    background:#fff;border-radius:14px;padding:16px 18px;box-shadow:var(--sh-card);
    display:flex;gap:14px;align-items:flex-start;
    transition:transform .2s ease,box-shadow .2s ease;
  }
  .news-mini:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover)}
  .news-mini .thumb{width:96px;height:68px;flex:0 0 auto;border-radius:10px;overflow:hidden;background:var(--c-alt)}
  .news-mini .thumb img{width:100%;height:100%;object-fit:cover}
  .news-mini h3{font-size:15px;font-weight:600;line-height:1.5;margin-bottom:6px}
  .news-mini h3 a{color:var(--c-text)}
  .news-mini h3 a:hover{color:var(--c-primary)}
  .news-mini .meta{font-size:12px;color:var(--c-text-3)}
  .line-clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .line-clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
  .empty-state{
    background:#fff;border:1px dashed var(--c-line);border-radius:var(--r-card);
    padding:52px 24px;text-align:center;
  }
  .empty-state svg{color:var(--c-text-3);margin:0 auto 14px}
  .empty-state h3{font-size:16px;font-weight:600;margin-bottom:6px}
  .empty-state p{font-size:13.5px;color:var(--c-text-3);margin-bottom:18px}

  /* ---------- faq ---------- */
  .faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
  .faq-item{
    background:#fff;border:1px solid var(--c-line);border-radius:14px;
    padding:4px 20px;transition:border-color .2s ease,box-shadow .2s ease;
  }
  .faq-item[open]{border-color:#C9DBFA;box-shadow:var(--sh-card)}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
    gap:16px;padding:16px 0;font-size:16px;font-weight:600;color:var(--c-text);
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary:focus-visible{outline:2px solid var(--c-primary);outline-offset:3px;border-radius:6px}
  .faq-icon{
    flex:0 0 auto;width:26px;height:26px;border-radius:999px;
    background:var(--c-primary-soft);color:var(--c-primary);
    display:grid;place-items:center;font-size:16px;font-weight:600;line-height:1;
    transition:transform .2s ease,background .2s ease,color .2s ease;
  }
  .faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--c-primary);color:#fff}
  .faq-body{padding:0 0 18px;font-size:15px;color:var(--c-text-2);line-height:1.85;max-width:820px}

  /* ---------- final cta ---------- */
  .cta-band{
    background:#fff;border:1px solid var(--c-line);border-radius:20px;
    padding:44px 38px;display:flex;align-items:center;justify-content:space-between;
    gap:28px;box-shadow:var(--sh-card);
  }
  .cta-band h2{font-size:clamp(22px,2.2vw,28px);font-weight:700;margin-bottom:10px}
  .cta-band p{font-size:14.5px;color:var(--c-text-2);margin:0;max-width:620px}
  @media (max-width:900px){
    .cta-band{flex-direction:column;align-items:flex-start;padding:30px 22px}
    .cta-band .btn{width:100%}
  }

  /* ---------- footer ---------- */
  .site-footer{background:var(--c-bg);border-top:1px solid var(--c-line);padding:60px 0 0;margin-top:0}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:40px}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
  .footer-brand .logo-mark{width:30px;height:30px;border-radius:9px}
  .footer-brand span{font-size:16px;font-weight:700;color:var(--c-text)}
  .footer-desc{font-size:13.5px;color:var(--c-text-2);line-height:1.8;max-width:340px}
  .footer-col h4{font-size:14px;font-weight:600;margin-bottom:14px;color:var(--c-text)}
  .footer-col a{display:block;font-size:13.5px;color:var(--c-text-2);margin-bottom:10px}
  .footer-col a:hover{color:var(--c-primary)}
  .footer-col p{font-size:13px;color:var(--c-text-3);line-height:1.8;margin-bottom:10px}
  .footer-bottom{
    border-top:1px solid var(--c-line);padding:20px 0;
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    font-size:12.5px;color:var(--c-text-3);
  }
  @media (max-width:1024px){ .footer-grid{grid-template-columns:1fr 1fr} }
  @media (max-width:640px){ .footer-grid{grid-template-columns:1fr} }

/* roulang page: article */
:root{
  --c-primary:#1E63E9;
  --c-primary-deep:#1548B0;
  --c-primary-light:#EAF1FE;
  --c-accent:#12B5A5;
  --c-cta:#FF7A45;
  --c-bg:#F5F7FB;
  --c-card:#FFFFFF;
  --c-section:#EEF3FC;
  --c-line:#E3E9F3;
  --c-text:#0F172A;
  --c-text-2:#56657D;
  --c-text-3:#8A97AC;
  --r-card:16px;
  --r-btn:10px;
  --r-img:14px;
  --sh-card:0 1px 2px rgba(15,23,42,.04), 0 10px 24px -14px rgba(30,99,233,.18);
  --sh-card-hover:0 2px 6px rgba(15,23,42,.06), 0 18px 34px -16px rgba(30,99,233,.28);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  background:var(--c-bg);
  color:var(--c-text);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px;}
@media(min-width:768px){.container{padding:0 20px;}}
@media(min-width:1024px){.container{padding:0 24px;}}
.num{font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 18px -12px rgba(15,23,42,.28);}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  height:56px;
}
@media(min-width:1024px){.header-inner{height:68px;}}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:var(--c-primary);color:#fff;flex:0 0 auto;
  box-shadow:0 8px 18px -10px rgba(30,99,233,.75);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.3px;white-space:nowrap;}
@media(min-width:1024px){.brand-text{font-size:18px;}}
.chip-nav{
  display:none;align-items:center;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
}
.chip-nav::-webkit-scrollbar{display:none;}
@media(min-width:1024px){.chip-nav{display:flex;flex:1 1 auto;justify-content:center;}}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:999px;
  background:#F1F5FB;color:var(--c-text-2);font-size:13px;font-weight:500;white-space:nowrap;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.chip:hover{background:var(--c-primary-light);color:var(--c-primary);}
.chip.active{background:var(--c-primary);color:#fff;}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 18px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:transform .18s ease,background .2s ease,box-shadow .2s ease,color .2s ease,border-color .2s ease;
  min-height:44px;
}
.btn:active{transform:translateY(0);}
.btn-cta{background:var(--c-cta);color:#fff;box-shadow:0 10px 22px -14px rgba(255,122,69,.95);}
.btn-cta:hover{background:#F26A33;transform:translateY(-1px);}
.btn-outline{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-outline:hover{background:var(--c-primary-light);transform:translateY(-1px);}
.btn-ghost{background:#F1F5FB;color:var(--c-text-2);}
.btn-ghost:hover{background:var(--c-primary-light);color:var(--c-primary);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-weight:600;font-size:14px;}
.btn-text span{transition:transform .2s ease;}
.btn-text:hover span{transform:translateX(3px);}
.icon-btn{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--c-line);background:#fff;
  display:flex;align-items:center;justify-content:center;color:var(--c-text-2);cursor:pointer;
}
@media(min-width:1024px){.icon-btn{display:none;}}
.mobile-chips{display:block;padding:0 16px 10px;}
.mobile-chips .chip-nav{display:flex;}
@media(min-width:1024px){.mobile-chips{display:none;}}
.mobile-panel{display:none;border-top:1px solid var(--c-line);background:#fff;}
.mobile-panel.open{display:block;}
.mobile-panel ul{list-style:none;margin:0;padding:8px 16px 16px;}
.mobile-panel li{border-bottom:1px solid var(--c-line);}
.mobile-panel li:last-child{border-bottom:0;}
.mobile-panel a{display:block;padding:14px 2px;font-size:15px;color:var(--c-text-2);}
.mobile-panel a:hover{color:var(--c-primary);}
@media(min-width:1024px){.mobile-panel{display:none !important;}}

/* ---------- breadcrumb ---------- */
.crumbs{padding:16px 0;font-size:13px;color:var(--c-text-3);}
.crumbs a{color:var(--c-primary);}
.crumbs a:hover{text-decoration:underline;text-underline-offset:3px;}
.crumbs .sep{margin:0 8px;color:var(--c-text-3);}
.crumbs .current{color:var(--c-text-3);display:inline-block;max-width:46vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;vertical-align:bottom;}

/* ---------- article ---------- */
.article-shell{padding-bottom:8px;}
.article-main{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card);
  padding:24px 18px;
}
@media(min-width:768px){.article-main{padding:36px 40px 44px;}}
.article-head{max-width:820px;margin:0 auto;}
.article-head h1{
  font-size:clamp(22px,2.6vw,34px);line-height:1.35;font-weight:700;letter-spacing:-.4px;margin:0 0 14px;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;font-size:13px;color:var(--c-text-2);
  padding-bottom:16px;border-bottom:1px solid var(--c-line);
}
.meta-row .dot{color:var(--c-text-3);}
.badge-cat{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:var(--c-primary-light);color:var(--c-primary);font-size:13px;font-weight:600;
}
.cover-wrap{max-width:820px;margin:20px auto 0;border-radius:var(--r-img);overflow:hidden;background:var(--c-section);aspect-ratio:16/9;}
.cover-wrap img{width:100%;height:100%;object-fit:cover;}
.figcap{font-size:13px;color:var(--c-text-3);text-align:center;margin:8px auto 0;max-width:820px;}

.article-body{max-width:800px;margin:26px auto 0;font-size:16.5px;line-height:1.9;color:var(--c-text);}
.article-body p{margin:0 0 1.1em;}
.article-body h2{
  position:relative;font-size:24px;line-height:1.4;font-weight:700;margin:40px 0 12px;padding-left:14px;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;width:3px;height:1em;border-radius:2px;background:var(--c-primary);}
.article-body h3{font-size:19px;font-weight:600;line-height:1.5;margin:28px 0 10px;}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:1.3em;}
.article-body ul li{margin-bottom:.5em;}
.article-body ul{list-style:none;padding-left:1.1em;}
.article-body ul li{position:relative;}
.article-body ul li::before{content:"";position:absolute;left:-1em;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--c-primary);}
.article-body ol{list-style:decimal;}
.article-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px;}
.article-body blockquote{
  margin:1.4em 0;padding:16px 18px;background:var(--c-primary-light);border-left:3px solid var(--c-primary);
  border-radius:0 12px 12px 0;color:var(--c-text-2);
}
.article-body img{border-radius:12px;margin:1.2em 0;}
.article-body strong{font-weight:700;}
.article-body code{background:#F1F5FB;border-radius:6px;padding:2px 6px;font-size:14px;}
.article-body pre{background:#F1F5FB;border-radius:12px;padding:16px;overflow-x:auto;font-size:14px;line-height:1.7;}
.article-body pre code{background:transparent;padding:0;}
.article-body table{width:100%;border-collapse:collapse;font-size:14.5px;margin:1.2em 0;}
.article-body th{background:var(--c-primary-light);color:var(--c-text);font-weight:600;text-align:left;}
.article-body th,.article-body td{border-bottom:1px solid var(--c-line);padding:10px 12px;font-variant-numeric:tabular-nums;}
.table-scroll{overflow-x:auto;}

.tag-row{max-width:800px;margin:32px auto 0;display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.tag{display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;background:#F1F5FB;color:var(--c-text-2);font-size:13px;}
.tag:hover{background:var(--c-primary-light);color:var(--c-primary);}
.tool-row{max-width:800px;margin:20px auto 0;display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.copy-tip{font-size:13px;color:var(--c-accent);min-height:20px;}
.notice{
  max-width:800px;margin:24px auto 0;padding:14px 16px;border-radius:12px;background:#F1F5FB;
  color:var(--c-text-2);font-size:14px;border:1px dashed var(--c-line);
}
.empty-state{max-width:640px;margin:0 auto;text-align:center;padding:48px 20px;}
.empty-state .ico{
  width:56px;height:56px;border-radius:16px;background:var(--c-primary-light);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;margin:0 auto 16px;
}
.empty-state h2{font-size:22px;margin:0 0 8px;}
.empty-state p{color:var(--c-text-2);margin:0 0 20px;}

/* ---------- section ---------- */
.section{padding:56px 0;}
@media(min-width:768px){.section{padding:64px 0;}}
@media(min-width:1024px){.section{padding:88px 0;}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:24px;}
.section-head h2{font-size:24px;font-weight:700;margin:0 0 8px;letter-spacing:-.3px;}
@media(min-width:1024px){.section-head h2{font-size:32px;}}
.section-head p{margin:0;color:var(--c-text-2);font-size:14px;}
.card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover);}
.card-media{aspect-ratio:16/9;overflow:hidden;border-radius:12px;background:var(--c-section);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.card:hover .card-media img{transform:scale(1.02);}
.line-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.line-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}

/* ---------- cta ---------- */
.cta-band{
  background:var(--c-primary-light);border-radius:20px;padding:32px 24px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
}
.cta-band h2{font-size:22px;font-weight:700;margin:0 0 6px;}
.cta-band p{margin:0;color:var(--c-text-2);font-size:14px;}

/* ---------- faq ---------- */
.faq-item{border:1px solid var(--c-line);border-radius:14px;background:#fff;margin-bottom:12px;overflow:hidden;}
.faq-item summary{
  list-style:none;cursor:pointer;padding:16px 18px;font-size:16px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .mark{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:var(--c-primary-light);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:15px;line-height:1;transition:transform .25s ease;
}
.faq-item[open] summary .mark{transform:rotate(45deg);}
.faq-item .faq-body{padding:0 18px 18px;color:var(--c-text-2);font-size:15px;line-height:1.8;}

/* ---------- footer ---------- */
.site-footer{background:var(--c-bg);border-top:1px solid var(--c-line);padding:48px 0 24px;margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:28px;}
@media(min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;margin-bottom:12px;}
.footer-desc{color:var(--c-text-2);font-size:13.5px;line-height:1.8;margin:0;max-width:340px;}
.footer-col h4{font-size:14px;font-weight:600;margin:0 0 12px;color:var(--c-text);}
.footer-col a{display:block;font-size:13.5px;color:var(--c-text-2);margin-bottom:9px;transition:color .2s ease;}
.footer-col a:hover{color:var(--c-primary);}
.footer-col p{font-size:13.5px;color:var(--c-text-2);margin:0 0 9px;}
.footer-bottom{
  margin-top:32px;padding-top:18px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;font-size:13px;color:var(--c-text-3);
}

/* roulang page: category1 */
:root{
    --c-primary:#1E63E9;
    --c-primary-dark:#1548B0;
    --c-primary-light:#EAF1FE;
    --c-accent:#12B5A5;
    --c-cta:#FF7A45;
    --c-bg:#F5F7FB;
    --c-card:#FFFFFF;
    --c-alt:#EEF3FC;
    --c-line:#E3E9F3;
    --c-text:#0F172A;
    --c-text-2:#56657D;
    --c-text-3:#8A97AC;
    --r-card:16px;
    --r-btn:10px;
    --r-img:14px;
    --sh-card:0 1px 2px rgba(15,23,42,.04), 0 10px 24px -14px rgba(30,99,233,.18);
    --sh-card-hover:0 2px 4px rgba(15,23,42,.05), 0 16px 32px -16px rgba(30,99,233,.28);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
    background:var(--c-bg);
    color:var(--c-text);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    text-align:left;
  }
  a{color:inherit;text-decoration:none;}
  img{display:block;max-width:100%;background:var(--c-alt);}
  button{font:inherit;cursor:pointer;border:0;background:none;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4{margin:0;line-height:1.3;}
  p{margin:0 0 1.1em;}
  p:last-child{margin-bottom:0;}
  :focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
  .num{font-variant-numeric:tabular-nums;}
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
  .section{padding:92px 0;}
  .section-tight{padding:64px 0;}
  .section-alt{background:var(--c-alt);}
  .section-title{font-size:clamp(24px,2.4vw,32px);font-weight:700;letter-spacing:-.3px;margin-bottom:12px;}
  .section-sub{font-size:14px;color:var(--c-text-2);max-width:760px;margin-bottom:0;}
  .section-head{margin-bottom:40px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:600;color:var(--c-primary);
    background:var(--c-primary-light);border-radius:999px;padding:6px 14px;margin-bottom:16px;
  }
  .eyebrow::before{content:"";width:6px;height:6px;border-radius:999px;background:var(--c-accent);}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:#fff;border-bottom:1px solid var(--c-line);
    transition:box-shadow .25s ease;
  }
  .site-header.scrolled{box-shadow:0 8px 22px -16px rgba(15,23,42,.35);}
  .header-inner{display:flex;align-items:center;gap:24px;height:68px;}
  .logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:-.2px;white-space:nowrap;flex:0 0 auto;}
  .logo-mark{
    width:34px;height:34px;border-radius:10px;flex:0 0 auto;
    background:linear-gradient(135deg,#1E63E9 0%,#12B5A5 100%);
    color:#fff;display:inline-flex;align-items:center;justify-content:center;
  }
  .chip-nav{display:flex;align-items:center;gap:8px;flex:1 1 auto;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;}
  .chip-nav::-webkit-scrollbar{display:none;}
  .chip{
    display:inline-flex;align-items:center;white-space:nowrap;
    font-size:13px;font-weight:500;padding:8px 16px;border-radius:999px;
    background:#F1F5FB;color:var(--c-text-2);
    transition:background .2s ease,color .2s ease,transform .2s ease;
  }
  .chip:hover{background:var(--c-primary-light);color:var(--c-primary);}
  .chip.active{background:var(--c-primary);color:#fff;}
  .header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
  .hamburger{
    display:none;width:44px;height:44px;border-radius:10px;
    align-items:center;justify-content:center;color:var(--c-text-2);
    border:1px solid var(--c-line);background:#fff;
  }
  .hamburger:hover{background:var(--c-primary-light);color:var(--c-primary);}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 22px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;line-height:1;
    transition:transform .18s ease,background .18s ease,color .18s ease,box-shadow .18s ease,border-color .18s ease;
    white-space:nowrap;
  }
  .btn-primary{background:var(--c-cta);color:#fff;box-shadow:0 10px 20px -12px rgba(255,122,69,.9);}
  .btn-primary:hover{background:#F26B33;transform:translateY(-1px);}
  .btn-primary:active{transform:translateY(0);background:#E45F28;}
  .btn-ghost{background:#fff;color:var(--c-primary);border:1px solid var(--c-primary);}
  .btn-ghost:hover{background:var(--c-primary-light);transform:translateY(-1px);}
  .btn-ghost:active{transform:translateY(0);}
  .btn-sm{height:38px;padding:0 18px;font-size:14px;}
  .btn-lg{height:48px;padding:0 26px;font-size:16px;}
  .btn[disabled],.btn.is-disabled{opacity:.6;cursor:not-allowed;transform:none;box-shadow:none;}
  .link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary);}
  .link-arrow span{transition:transform .18s ease;}
  .link-arrow:hover span{transform:translateX(2px);}

  /* ---------- page head ---------- */
  .page-head{
    position:relative;overflow:hidden;
    background:
      radial-gradient(600px 260px at 88% 12%, rgba(30,99,233,.12), transparent 70%),
      radial-gradient(420px 200px at 8% 90%, rgba(18,181,165,.10), transparent 72%),
      #fff;
    border-bottom:1px solid var(--c-line);
    padding:64px 0 72px;
  }
  .page-head-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:48px;align-items:center;}
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);margin-bottom:20px;}
  .breadcrumb a{color:var(--c-primary);}
  .breadcrumb a:hover{text-decoration:underline;}
  .breadcrumb .sep{color:var(--c-text-3);}
  .page-head h1{
    font-size:clamp(30px,4.2vw,50px);font-weight:700;line-height:1.25;letter-spacing:-.5px;margin-bottom:18px;
  }
  .page-head h1 em{font-style:normal;color:var(--c-primary);}
  .page-head .lead{font-size:17px;color:var(--c-text-2);line-height:1.85;max-width:640px;}
  .page-head .btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
  .page-head-media{border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card);aspect-ratio:16/10;}
  .page-head-media img{width:100%;height:100%;object-fit:cover;border-radius:var(--r-card);}

  /* ---------- countdown band ---------- */
  .live-band{
    background:#1548B0;
    color:#fff;
    border-radius:20px;
    padding:36px 40px;
    display:grid;
    grid-template-columns:minmax(0,1fr) auto;
    gap:32px;
    align-items:center;
    box-shadow:0 24px 48px -30px rgba(21,72,176,.9);
  }
  .live-band h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;margin-bottom:10px;}
  .live-band p{font-size:14px;color:rgba(255,255,255,.82);margin:0;max-width:560px;}
  .countdown{display:flex;gap:12px;}
  .count-cell{
    min-width:78px;padding:12px 10px;border-radius:14px;
    background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);
    text-align:center;
  }
  .count-cell b{display:block;font-size:26px;font-weight:700;letter-spacing:-.5px;font-variant-numeric:tabular-nums;}
  .count-cell span{display:block;font-size:12px;color:rgba(255,255,255,.75);margin-top:2px;}

  /* ---------- metrics ---------- */
  .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:40px;}
  .metric{
    background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    padding:24px;box-shadow:var(--sh-card);transition:transform .2s ease,box-shadow .2s ease;
  }
  .metric:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover);}
  .metric b{display:block;font-size:30px;font-weight:700;letter-spacing:-.5px;color:var(--c-primary);font-variant-numeric:tabular-nums;}
  .metric span{display:block;font-size:13px;color:var(--c-text-2);margin-top:6px;}

  /* ---------- steps ---------- */
  .steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;}
  .steps-grid::before{
    content:"";position:absolute;top:23px;left:12.5%;right:12.5%;height:2px;
    background:linear-gradient(90deg, rgba(30,99,233,.22), rgba(18,181,165,.42), rgba(30,99,233,.22));
  }
  .step-dot{
    position:relative;z-index:1;
    width:46px;height:46px;border-radius:999px;background:#fff;
    border:2px solid var(--c-primary);color:var(--c-primary);
    display:flex;align-items:center;justify-content:center;
    font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;
    margin-bottom:18px;
  }
  .step-card{
    background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    padding:22px 20px;box-shadow:var(--sh-card);height:100%;
    transition:transform .2s ease,box-shadow .2s ease;
  }
  .step-card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover);}
  .step-card h3{font-size:19px;font-weight:600;margin-bottom:8px;}
  .step-card p{font-size:14px;color:var(--c-text-2);line-height:1.8;margin:0;}

  /* ---------- cards ---------- */
  .card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
  .card{
    background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    overflow:hidden;box-shadow:var(--sh-card);
    transition:transform .2s ease,box-shadow .2s ease;
    display:flex;flex-direction:column;
  }
  .card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover);}
  .card-media{aspect-ratio:16/9;overflow:hidden;}
  .card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
  .card:hover .card-media img{transform:scale(1.02);}
  .card-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
  .card-body h3{font-size:19px;font-weight:600;}
  .card-body p{font-size:14px;color:var(--c-text-2);line-height:1.8;margin:0;}
  .badge{
    align-self:flex-start;font-size:13px;font-weight:600;
    background:var(--c-primary-light);color:var(--c-primary);
    padding:4px 12px;border-radius:999px;
  }
  .badge-accent{background:rgba(18,181,165,.12);color:#0E9184;}

  /* ---------- plan compare ---------- */
  .plan-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
  .plan{
    background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    padding:28px;box-shadow:var(--sh-card);
  }
  .plan.is-pro{border-color:rgba(30,99,233,.35);box-shadow:0 1px 2px rgba(15,23,42,.04),0 18px 36px -20px rgba(30,99,233,.4);}
  .plan-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:6px;}
  .plan-head h3{font-size:20px;font-weight:700;}
  .plan-note{font-size:13px;color:var(--c-text-3);margin-bottom:18px;}
  .plan-row{
    display:flex;align-items:baseline;justify-content:space-between;gap:16px;
    padding:12px 0;border-top:1px solid var(--c-line);font-size:14px;
  }
  .plan-row .k{color:var(--c-text-2);}
  .plan-row .v{font-weight:600;font-variant-numeric:tabular-nums;}

  /* ---------- rank table ---------- */
  .table-wrap{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card);overflow-x:auto;}
  table.rank{width:100%;border-collapse:collapse;min-width:620px;}
  table.rank th,table.rank td{padding:14px 18px;font-size:14px;text-align:left;white-space:nowrap;}
  table.rank thead th{
    background:var(--c-primary-light);color:var(--c-primary);
    font-size:13px;font-weight:600;letter-spacing:.2px;
  }
  table.rank tbody tr{border-top:1px solid var(--c-line);}
  table.rank tbody tr:hover{background:#FAFCFF;}
  table.rank td.n{font-variant-numeric:tabular-nums;color:var(--c-text-2);}
  table.rank td.team{font-weight:600;color:var(--c-text);}
  .table-caption{font-size:13px;color:var(--c-text-3);text-align:center;margin-top:14px;}

  /* ---------- faq ---------- */
  .faq-list{display:flex;flex-direction:column;gap:14px;max-width:860px;}
  details.faq{
    background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    box-shadow:var(--sh-card);overflow:hidden;
    transition:box-shadow .2s ease,border-color .2s ease;
  }
  details.faq:hover{border-color:#D5E0F4;}
  details.faq[open]{box-shadow:var(--sh-card-hover);border-color:rgba(30,99,233,.3);}
  details.faq summary{
    list-style:none;cursor:pointer;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;font-size:16px;font-weight:600;color:var(--c-text);
  }
  details.faq summary::-webkit-details-marker{display:none;}
  details.faq summary::after{
    content:"+";flex:0 0 auto;width:26px;height:26px;border-radius:999px;
    background:var(--c-primary-light);color:var(--c-primary);
    display:inline-flex;align-items:center;justify-content:center;
    font-size:17px;font-weight:600;line-height:1;transition:transform .22s ease;
  }
  details.faq[open] summary::after{content:"−";transform:rotate(180deg);}
  details.faq .faq-body{padding:0 22px 20px;font-size:15px;color:var(--c-text-2);line-height:1.8;}

  /* ---------- cta ---------- */
  .cta-card{
    background:linear-gradient(135deg,#EAF1FE 0%,#EEF3FC 60%,#E6F6F3 100%);
    border:1px solid var(--c-line);border-radius:20px;padding:44px 40px;
    display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:center;
  }
  .cta-card h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;margin-bottom:10px;}
  .cta-card p{font-size:15px;color:var(--c-text-2);margin:0;max-width:560px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
  .cta-foot{margin-top:22px;font-size:13px;color:var(--c-text-3);font-variant-numeric:tabular-nums;}

  /* ---------- footer ---------- */
  .site-footer{background:var(--c-bg);border-top:1px solid var(--c-line);padding:64px 0 28px;margin-top:24px;}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;}
  .footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;margin-bottom:14px;}
  .footer-desc{font-size:14px;color:var(--c-text-2);line-height:1.85;max-width:360px;margin:0;}
  .footer-col h4{font-size:14px;font-weight:600;margin-bottom:14px;color:var(--c-text);}
  .footer-col a,.footer-col p{display:block;font-size:13.5px;color:var(--c-text-2);margin:0 0 8px;line-height:1.75;}
  .footer-col a:hover{color:var(--c-primary);}
  .footer-bottom{
    margin-top:40px;padding-top:20px;border-top:1px solid var(--c-line);
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    font-size:13px;color:var(--c-text-3);
  }

  /* ---------- responsive ---------- */
  @media (max-width:1024px){
    .section{padding:64px 0;}
    .page-head{padding:52px 0 60px;}
    .page-head-grid{grid-template-columns:1fr;gap:32px;}
    .page-head-media{order:-1;aspect-ratio:16/9;}
    .card-grid{grid-template-columns:repeat(2,1fr);}
    .steps-grid{grid-template-columns:repeat(2,1fr);gap:20px;}
    .steps-grid::before{display:none;}
    .metrics{grid-template-columns:repeat(2,1fr);}
    .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px;}
    .live-band{grid-template-columns:1fr;gap:24px;padding:30px 28px;}
    .cta-card{grid-template-columns:1fr;gap:24px;padding:34px 28px;}
  }
  @media (max-width:860px){
    .container{padding:0 16px;}
    .header-inner{height:56px;gap:12px;position:relative;}
    .hamburger{display:inline-flex;}
    .chip-nav{
      position:absolute;top:56px;left:16px;right:16px;
      flex-direction:column;align-items:stretch;gap:6px;
      background:#fff;border:1px solid var(--c-line);border-radius:14px;
      padding:12px;display:none;
      box-shadow:0 20px 40px -24px rgba(15,23,42,.45);
      max-height:70vh;overflow-y:auto;
    }
    .chip-nav.open{display:flex;}
    .chip{width:100%;justify-content:flex-start;padding:11px 14px;border-radius:10px;}
    .logo{font-size:16px;}
    .logo-mark{width:30px;height:30px;border-radius:9px;}
  }
  @media (max-width:640px){
    body{font-size:15.5px;}
    .section{padding:56px 0;}
    .section-head{margin-bottom:28px;}
    .page-head{padding:40px 0 48px;}
    .page-head h1{font-size:clamp(28px,8vw,38px);}
    .page-head .lead{font-size:15.5px;}
    .card-grid{grid-template-columns:1fr;}
    .steps-grid{grid-template-columns:1fr;}
    .plan-grid{grid-template-columns:1fr;}
    .metrics{grid-template-columns:1fr;gap:14px;}
    .footer-grid{grid-template-columns:1fr;gap:24px;}
    .countdown{gap:8px;}
    .count-cell{min-width:0;flex:1;padding:10px 6px;}
    .count-cell b{font-size:20px;}
    .page-head .btn-row .btn{flex:1 1 calc(50% - 6px);}
    .cta-actions .btn{flex:1 1 100%;}
    .btn{height:46px;}
  }

/* roulang page: category2 */
:root{
    --c-primary:#1E63E9;
    --c-primary-deep:#1548B0;
    --c-primary-soft:#EAF1FE;
    --c-accent:#12B5A5;
    --c-cta:#FF7A45;
    --c-bg:#F5F7FB;
    --c-card:#FFFFFF;
    --c-alt:#EEF3FC;
    --c-line:#E3E9F3;
    --c-text:#0F172A;
    --c-text-2:#56657D;
    --c-text-3:#8A97AC;
    --r-card:16px;
    --r-btn:10px;
    --shadow-card:0 1px 2px rgba(15,23,42,.04), 0 10px 24px -14px rgba(30,99,233,.18);
    --shadow-hover:0 2px 4px rgba(15,23,42,.05), 0 18px 32px -16px rgba(30,99,233,.28);
  }

  *,*::before,*::after{ box-sizing:border-box; }

  html{ scroll-behavior:smooth; }

  body{
    margin:0;
    background:var(--c-bg);
    color:var(--c-text);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }

  img{ max-width:100%; display:block; }
  a{ color:inherit; text-decoration:none; }
  button{ font:inherit; }
  :focus-visible{ outline:2px solid var(--c-primary); outline-offset:2px; border-radius:6px; }

  .container{ width:100%; max-width:1200px; margin:0 auto; padding:0 24px; }

  /* ---------- header ---------- */
  .site-header{
    position:sticky; top:0; z-index:60;
    background:#fff;
    border-bottom:1px solid var(--c-line);
    transition:box-shadow .25s ease;
  }
  .site-header.is-scrolled{ box-shadow:0 8px 24px -18px rgba(15,23,42,.45); }
  .header-inner{ display:flex; align-items:center; gap:24px; min-height:68px; }
  .brand{ display:inline-flex; align-items:center; gap:10px; flex:0 0 auto; }
  .logo-mark{
    width:34px; height:34px; border-radius:10px;
    background:var(--c-primary-soft); color:var(--c-primary);
    display:grid; place-items:center;
  }
  .brand-text{ font-size:18px; font-weight:700; letter-spacing:-.3px; white-space:nowrap; }

  .chip-nav{
    display:flex; align-items:center; gap:8px;
    flex:1 1 auto; justify-content:center;
    overflow-x:auto; -ms-overflow-style:none; scrollbar-width:none;
    padding:4px 0;
  }
  .chip-nav::-webkit-scrollbar{ display:none; }
  .chip{
    display:inline-flex; align-items:center; height:34px; padding:0 16px;
    border-radius:999px; font-size:14px; font-weight:500;
    color:var(--c-text-2); background:#F1F5FB; white-space:nowrap;
    transition:background .2s ease,color .2s ease;
  }
  .chip:hover{ background:var(--c-primary-soft); color:var(--c-primary); }
  .chip.active{ background:var(--c-primary); color:#fff; }

  .header-actions{ display:flex; align-items:center; gap:10px; flex:0 0 auto; }
  .menu-btn{
    display:none; width:40px; height:40px; border-radius:10px;
    border:1px solid var(--c-line); background:#fff; color:var(--c-text-2);
    align-items:center; justify-content:center; cursor:pointer;
  }
  .menu-btn:hover{ background:var(--c-primary-soft); color:var(--c-primary); }

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex; align-items:center; justify-content:center; gap:8px;
    height:44px; padding:0 20px; border-radius:var(--r-btn);
    font-size:15px; font-weight:600; line-height:1; cursor:pointer;
    border:1px solid transparent; white-space:nowrap;
    transition:background .2s ease,color .2s ease,transform .15s ease,box-shadow .2s ease;
  }
  .btn:active{ transform:translateY(0); }
  .btn-cta{ background:var(--c-cta); color:#fff; box-shadow:0 8px 18px -12px rgba(255,122,69,.9); }
  .btn-cta:hover{ background:#F06B36; transform:translateY(-1px); }
  .btn-ghost{ background:#fff; color:var(--c-primary); border-color:var(--c-primary); }
  .btn-ghost:hover{ background:var(--c-primary-soft); transform:translateY(-1px); }
  .btn-sm{ height:38px; padding:0 16px; font-size:14px; }
  .btn-block{ width:100%; }

  .link-arrow{
    display:inline-flex; align-items:center; gap:6px;
    color:var(--c-primary); font-size:14px; font-weight:600;
  }
  .link-arrow span{ transition:transform .2s ease; }
  .link-arrow:hover span{ transform:translateX(2px); }

  /* ---------- page head ---------- */
  .page-head{
    position:relative; overflow:hidden;
    background:linear-gradient(180deg,#FFFFFF 0%,#EFF4FE 100%);
    border-bottom:1px solid var(--c-line);
    padding:56px 0 64px;
  }
  .page-head::after{
    content:""; position:absolute; right:-140px; top:-140px;
    width:460px; height:460px; border-radius:50%;
    background:radial-gradient(circle,rgba(30,99,233,.14),rgba(30,99,233,0) 70%);
    pointer-events:none;
  }
  .page-head-grid{
    position:relative; z-index:1;
    display:grid; grid-template-columns:1.15fr .85fr; gap:48px; align-items:center;
  }
  .eyebrow{
    display:inline-flex; align-items:center; gap:8px;
    font-size:13px; font-weight:600; color:var(--c-primary);
    background:var(--c-primary-soft); padding:6px 14px; border-radius:999px;
  }
  .h1-title{
    font-size:clamp(30px,4.2vw,50px);
    line-height:1.25; font-weight:700; letter-spacing:-.5px;
    margin:18px 0 14px;
  }
  .lead{
    font-size:17px; line-height:1.85; color:var(--c-text-2);
    max-width:680px; margin:0 0 26px;
  }
  .page-head-actions{ display:flex; flex-wrap:wrap; gap:12px; }
  .page-head-media{
    border-radius:var(--r-card); overflow:hidden;
    aspect-ratio:4/3; background:var(--c-alt); box-shadow:var(--shadow-card);
  }
  .page-head-media img{ width:100%; height:100%; object-fit:cover; }

  /* ---------- stat strip ---------- */
  .stat-strip{ background:#fff; border-bottom:1px solid var(--c-line); padding:26px 0; }
  .stat-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:16px; }
  .stat-item{ padding:0 4px; }
  .stat-num{
    font-size:26px; font-weight:700; letter-spacing:-.5px;
    font-variant-numeric:tabular-nums; color:var(--c-primary-deep);
  }
  .stat-label{ font-size:13px; color:var(--c-text-3); margin-top:2px; }

  /* ---------- sections ---------- */
  .section{ padding:88px 0; }
  .section-alt{ background:var(--c-alt); }
  .section-title{
    font-size:clamp(24px,2.6vw,32px); font-weight:700;
    letter-spacing:-.3px; line-height:1.35; margin:0 0 12px;
  }
  .section-sub{ font-size:14px; color:var(--c-text-2); margin:0 0 40px; max-width:760px; }

  /* ---------- zigzag ---------- */
  .zigzag{ display:grid; gap:64px; }
  .zig-item{ display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center; }
  .zig-item.reverse .zig-media{ order:2; }
  .zig-media{
    border-radius:var(--r-card); overflow:hidden; background:var(--c-alt);
    aspect-ratio:16/10; box-shadow:var(--shadow-card);
  }
  .zig-media img{ width:100%; height:100%; object-fit:cover; transition:transform .4s ease; }
  .zig-media:hover img{ transform:scale(1.02); }
  .zig-index{
    font-size:13px; font-weight:700; letter-spacing:2px;
    color:var(--c-accent); font-variant-numeric:tabular-nums;
  }
  .zig-title{ font-size:20px; font-weight:600; line-height:1.5; margin:10px 0 12px; }
  .zig-body p{ color:var(--c-text-2); margin:0 0 14px; font-size:15.5px; }
  .zig-list{ list-style:none; padding:0; margin:0; display:grid; gap:10px; }
  .zig-list li{ display:flex; gap:10px; align-items:flex-start; font-size:14.5px; color:var(--c-text-2); }
  .zig-list svg{ flex:0 0 auto; margin-top:5px; color:var(--c-accent); }

  /* ---------- checklist ---------- */
  .check-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
  .check-card{
    background:#fff; border:1px solid var(--c-line); border-radius:var(--r-card);
    padding:24px; box-shadow:var(--shadow-card);
    transition:transform .2s ease,box-shadow .2s ease;
  }
  .check-card:hover{ transform:translateY(-2px); box-shadow:var(--shadow-hover); }
  .check-badge{
    display:inline-flex; align-items:center; justify-content:center;
    width:38px; height:38px; border-radius:12px;
    background:rgba(18,181,165,.12); color:var(--c-accent); margin-bottom:14px;
  }
  .check-card h3{ font-size:18px; font-weight:600; margin:0 0 8px; }
  .check-card p{ font-size:14px; color:var(--c-text-3); margin:0; }
  .check-list{ list-style:none; padding:0; margin:16px 0 0; display:grid; gap:10px; }
  .check-list li{ display:flex; gap:10px; align-items:flex-start; font-size:14px; color:var(--c-text-2); }
  .check-list svg{ flex:0 0 auto; margin-top:5px; color:var(--c-primary); }

  /* ---------- download band ---------- */
  .download-panel{
    background:#fff; border:1px solid var(--c-line); border-radius:20px;
    padding:38px; box-shadow:var(--shadow-card);
    display:grid; grid-template-columns:1.35fr .65fr; gap:36px; align-items:center;
  }
  .download-panel h2{ margin-top:0; }
  .download-panel p{ color:var(--c-text-2); font-size:15px; margin:0 0 22px; }
  .dl-buttons{ display:flex; flex-wrap:wrap; gap:12px; }
  .info-card{ background:var(--c-alt); border-radius:var(--r-card); padding:22px; }
  .info-card h3{ font-size:15px; font-weight:600; margin:0 0 8px; }
  .info-row{
    display:flex; justify-content:space-between; gap:12px; align-items:baseline;
    padding:10px 0; border-bottom:1px solid var(--c-line); font-size:14px;
  }
  .info-row:last-child{ border-bottom:0; }
  .info-row span:first-child{ color:var(--c-text-3); }
  .info-row span:last-child{
    color:var(--c-text); font-weight:600;
    font-variant-numeric:tabular-nums; word-break:break-all; text-align:right;
  }

  /* ---------- faq ---------- */
  .faq-list{ display:grid; gap:12px; max-width:900px; }
  .faq-item{
    background:#fff; border:1px solid var(--c-line); border-radius:14px;
    box-shadow:var(--shadow-card); overflow:hidden;
  }
  .faq-item summary{
    list-style:none; cursor:pointer; padding:18px 22px;
    font-size:16px; font-weight:600; line-height:1.6;
    display:flex; justify-content:space-between; align-items:center; gap:16px;
  }
  .faq-item summary::-webkit-details-marker{ display:none; }
  .faq-item summary::after{
    content:"+"; font-size:20px; line-height:1; color:var(--c-primary);
    transition:transform .2s ease;
  }
  .faq-item[open] summary::after{ content:"−"; }
  .faq-item summary:hover{ color:var(--c-primary); }
  .faq-body{ padding:0 22px 20px; font-size:15px; line-height:1.85; color:var(--c-text-2); }

  /* ---------- cta band ---------- */
  .cta-band{
    background:var(--c-primary-soft); border:1px solid #DCE7FC; border-radius:20px;
    padding:44px; display:grid; grid-template-columns:1fr auto; gap:28px; align-items:center;
  }
  .cta-band h2{ font-size:clamp(22px,2.4vw,28px); font-weight:700; margin:0 0 10px; }
  .cta-band p{ font-size:15px; color:var(--c-text-2); margin:0; }
  .cta-actions{ display:flex; flex-wrap:wrap; align-items:center; gap:16px; }

  /* ---------- footer ---------- */
  .site-footer{
    background:var(--c-bg); border-top:1px solid var(--c-line);
    padding:56px 0 24px;
  }
  .footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1.2fr; gap:32px; }
  .footer-brand{ display:flex; align-items:center; gap:10px; font-size:17px; font-weight:700; margin-bottom:14px; }
  .footer-desc{ font-size:13.5px; line-height:1.8; color:var(--c-text-2); margin:0; }
  .footer-col h4{ font-size:14px; font-weight:600; margin:0 0 14px; }
  .footer-col a{ display:block; font-size:13.5px; color:var(--c-text-2); margin-bottom:10px; transition:color .2s ease; }
  .footer-col a:hover{ color:var(--c-primary); }
  .footer-col p{ font-size:13.5px; color:var(--c-text-2); margin:0 0 8px; }
  .footer-bottom{
    display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
    border-top:1px solid var(--c-line); margin-top:40px; padding-top:20px;
    font-size:13px; color:var(--c-text-3);
  }

  /* ---------- responsive ---------- */
  @media (max-width:1023px){
    .container{ padding:0 20px; }
    .page-head{ padding:48px 0 52px; }
    .page-head-grid{ grid-template-columns:1fr; gap:32px; }
    .page-head-media{ aspect-ratio:16/9; }
    .section{ padding:64px 0; }
    .zigzag{ gap:48px; }
    .zig-item{ grid-template-columns:1fr; gap:24px; }
    .zig-item.reverse .zig-media{ order:0; }
    .check-grid{ grid-template-columns:repeat(2,1fr); }
    .download-panel{ grid-template-columns:1fr; gap:26px; padding:30px; }
    .cta-band{ grid-template-columns:1fr; padding:32px; }
    .footer-grid{ grid-template-columns:repeat(2,1fr); gap:28px; }
    .stat-grid{ grid-template-columns:repeat(2,1fr); gap:20px; }
  }

  @media (max-width:767px){
    .header-inner{ flex-wrap:wrap; gap:10px; padding-top:10px; padding-bottom:10px; min-height:56px; }
    .brand-text{ font-size:17px; }
    .menu-btn{ display:inline-flex; }
    .chip-nav{ order:3; flex-basis:100%; justify-content:flex-start; padding-bottom:4px; }
    .chip-nav.is-collapsed{ display:none; }
  }

  @media (max-width:639px){
    .container{ padding:0 16px; }
    .section{ padding:56px 0; }
    .h1-title{ margin-top:14px; }
    .lead{ font-size:16px; }
    .page-head-actions .btn{ width:100%; }
    .stat-grid{ grid-template-columns:repeat(2,1fr); }
    .check-grid{ grid-template-columns:1fr; }
    .dl-buttons{ flex-direction:column; }
    .dl-buttons .btn{ width:100%; }
    .cta-actions{ flex-direction:column; align-items:stretch; }
    .cta-actions .btn{ width:100%; }
    .footer-grid{ grid-template-columns:1fr; }
    .download-panel{ padding:24px; }
    .zig-title{ font-size:18px; }
  }