/* roulang page: index */
:root{
      --brand:#2F6FED;
      --brand-dark:#1E40AF;
      --brand-soft:#EAF2FF;
      --accent:#14B8A6;
      --accent-soft:#CCFBF1;
      --ink:#111827;
      --muted:#6B7280;
      --line:#E5E7EB;
      --page:#F7FAFE;
      --card:#FFFFFF;
      --shadow-card:0 18px 45px rgba(15,23,42,.08);
      --radius-card:24px;
      --nav-h:74px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",Arial,sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at 12% 5%, rgba(47,111,237,.10), transparent 30%),
        radial-gradient(circle at 88% 18%, rgba(20,184,166,.10), transparent 28%),
        linear-gradient(180deg,#fff 0%,var(--page) 42%,#fff 100%);
      line-height:1.75;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    ::selection{background:var(--brand-soft);color:var(--brand-dark)}
    .site-container{width:min(100% - 40px,1280px);margin-inline:auto}
    .section-space{padding:96px 0}
    .section-title{letter-spacing:-.04em}
    .nav-shell{
      position:sticky;top:0;z-index:50;
      background:rgba(255,255,255,.90);
      backdrop-filter:blur(16px);
      border-bottom:1px solid rgba(226,232,240,.85);
    }
    .brand-mark{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),#5AA7FF);
      box-shadow:0 12px 26px rgba(47,111,237,.22);
      color:#fff;
      position:relative;
      overflow:hidden;
    }
    .brand-mark:after{
      content:"";position:absolute;inset:auto -10px -14px auto;
      width:34px;height:34px;border-radius:999px;
      background:rgba(255,255,255,.22);
    }
    .nav-link{
      display:inline-flex;align-items:center;gap:6px;
      padding:9px 14px;border-radius:999px;
      font-size:14px;font-weight:650;color:#475569;
      transition:all .22s ease;
      white-space:nowrap;
    }
    .nav-link:hover{background:#F1F6FF;color:var(--brand)}
    .nav-link.active{background:var(--brand-soft);color:var(--brand-dark)}
    .search-box{
      height:42px;border:1px solid #E2E8F0;border-radius:999px;
      background:#F8FAFC;padding:0 14px;display:flex;align-items:center;gap:8px;
      transition:all .2s ease;
    }
    .search-box:focus-within,.search-box:hover{border-color:rgba(47,111,237,.42);background:#fff;box-shadow:0 0 0 4px rgba(47,111,237,.08)}
    .search-box input{width:190px;border:0;outline:0;background:transparent;font-size:13px;color:#334155}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:44px;padding:0 20px;border-radius:999px;
      font-weight:750;font-size:14px;
      transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
      border:1px solid transparent;
    }
    .btn:focus-visible{outline:none;box-shadow:0 0 0 4px rgba(47,111,237,.20)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#3BA7F5);color:#fff;box-shadow:0 14px 28px rgba(47,111,237,.22)}
    .btn-primary:hover{background:linear-gradient(135deg,var(--brand-dark),var(--brand));transform:translateY(-2px);box-shadow:0 18px 34px rgba(30,64,175,.26)}
    .btn-secondary{background:#fff;color:#1E293B;border-color:#E2E8F0}
    .btn-secondary:hover{background:var(--brand-soft);border-color:#BBD2FF;color:var(--brand-dark);transform:translateY(-2px)}
    .btn-ghost{color:var(--brand-dark);background:rgba(234,242,255,.75)}
    .btn-ghost:hover{background:#DBEAFE;transform:translateY(-2px)}
    .badge{
      display:inline-flex;align-items:center;gap:6px;
      padding:6px 11px;border-radius:999px;
      background:var(--brand-soft);color:var(--brand-dark);
      font-size:13px;font-weight:750;
    }
    .badge-accent{background:var(--accent-soft);color:#0F766E}
    .card{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(226,232,240,.86);
      border-radius:var(--radius-card);
      box-shadow:0 12px 34px rgba(15,23,42,.05);
      transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease,background .24s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card);border-color:rgba(47,111,237,.28)}
    .image-zoom{overflow:hidden}
    .image-zoom img{transition:transform .45s ease}
    .card:hover .image-zoom img{transform:scale(1.035)}
    .hero-bg{
      min-height:680px;
      padding-top:calc(var(--nav-h) + 54px);
      padding-bottom:86px;
      position:relative;
      overflow:hidden;
    }
    .hero-bg:before{
      content:"";
      position:absolute;inset:0;
      background-image:
        linear-gradient(rgba(47,111,237,.05) 1px, transparent 1px),
        linear-gradient(90deg,rgba(47,111,237,.05) 1px, transparent 1px);
      background-size:36px 36px;
      mask-image:linear-gradient(180deg,rgba(0,0,0,.72),transparent 72%);
      pointer-events:none;
    }
    .dashboard-card{
      background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(248,250,252,.94));
      border:1px solid rgba(226,232,240,.9);
      box-shadow:0 28px 80px rgba(15,23,42,.12);
      border-radius:32px;
      position:relative;
    }
    .float-card{box-shadow:0 18px 42px rgba(15,23,42,.10);border:1px solid rgba(226,232,240,.9)}
    .mini-bar{height:8px;border-radius:999px;background:#E2E8F0;overflow:hidden}
    .mini-bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--accent))}
    .masonry{columns:3 260px;column-gap:22px}
    .masonry .case-card{break-inside:avoid;margin-bottom:22px}
    details summary{list-style:none;cursor:pointer}
    details summary::-webkit-details-marker{display:none}
    .faq-item[open]{background:#F8FBFF;border-color:#BBD2FF}
    .faq-item summary .plus{transition:transform .2s ease}
    .faq-item[open] summary .plus{transform:rotate(45deg);color:var(--brand)}
    .form-field{
      width:100%;border:1px solid #E2E8F0;background:#F8FAFC;
      border-radius:16px;padding:12px 14px;outline:none;
      transition:all .2s ease;color:#1E293B;
    }
    .form-field:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(47,111,237,.12)}
    .footer-link{color:#CBD5E1;font-size:14px;transition:color .2s ease,transform .2s ease;display:inline-flex}
    .footer-link:hover{color:#fff;transform:translateX(2px)}
    .mobile-panel{display:none}
    @media (max-width:1120px){
      .desktop-nav,.desktop-actions{display:none!important}
      .mobile-panel.open{display:block}
      .hero-bg{padding-top:112px;min-height:auto}
    }
    @media (max-width:768px){
      .site-container{width:min(100% - 28px,1280px)}
      .section-space{padding:68px 0}
      .hero-bg{padding-bottom:60px}
      .btn{width:100%}
      .search-box input{width:100%}
    }
    @media (max-width:520px){
      .brand-mark{width:38px;height:38px;border-radius:14px}
      .section-space{padding:58px 0}
      .masonry{columns:1}
    }

/* roulang page: category1 */
:root{
      --brand:#2F6FED;
      --brand-dark:#1E40AF;
      --brand-soft:#EAF2FF;
      --accent:#14B8A6;
      --accent-soft:#CCFBF1;
      --ink:#111827;
      --muted:#6B7280;
      --line:#E5E7EB;
      --page:#F7FAFE;
      --card:#FFFFFF;
      --shadow-card:0 18px 45px rgba(15,23,42,.08);
      --shadow-lift:0 24px 64px rgba(37,99,235,.14);
      --radius-card:24px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",Arial,sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at 12% 8%, rgba(47,111,237,.10), transparent 28%),
        radial-gradient(circle at 88% 18%, rgba(20,184,166,.09), transparent 24%),
        linear-gradient(180deg,#fff 0%,#F7FAFE 42%,#fff 100%);
      line-height:1.75;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    ::selection{background:rgba(47,111,237,.18);color:#0F172A}
    .site-container{width:min(100% - 40px,1280px);margin-inline:auto}
    .nav-shell{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(255,255,255,.9);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(226,232,240,.9);
      box-shadow:0 8px 30px rgba(15,23,42,.04);
    }
    .brand-mark{
      width:42px;
      height:42px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      border-radius:16px;
      background:linear-gradient(135deg,var(--brand),#5B8CFF 58%,#14B8A6);
      box-shadow:0 12px 28px rgba(47,111,237,.24);
      flex:0 0 auto;
    }
    .nav-link{
      min-height:42px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:0 16px;
      border-radius:999px;
      color:#475569;
      font-size:14px;
      font-weight:700;
      transition:all .22s ease;
    }
    .nav-link:hover{background:#F1F6FF;color:var(--brand-dark)}
    .nav-link.active{background:var(--brand-soft);color:var(--brand-dark)}
    .search-box{
      height:42px;
      width:268px;
      display:flex;
      align-items:center;
      gap:9px;
      padding:0 14px;
      border-radius:999px;
      background:#F8FAFC;
      border:1px solid #E2E8F0;
      transition:all .2s ease;
    }
    .search-box:hover,.search-box:focus-within{
      border-color:rgba(47,111,237,.5);
      box-shadow:0 0 0 4px rgba(47,111,237,.10);
      background:#fff;
    }
    .search-box input{width:100%;border:0;outline:0;background:transparent;color:#0F172A;font-size:14px}
    .search-box input::placeholder{color:#94A3B8}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.5rem;
      min-height:48px;
      padding:0 22px;
      border-radius:999px;
      font-weight:800;
      font-size:14px;
      transition:all .22s ease;
      border:1px solid transparent;
      cursor:pointer;
      white-space:nowrap;
    }
    .btn-primary{
      background:linear-gradient(135deg,var(--brand),#3B82F6 62%,#14B8A6);
      color:#fff;
      box-shadow:0 14px 30px rgba(47,111,237,.24);
    }
    .btn-primary:hover{transform:translateY(-2px);background:linear-gradient(135deg,var(--brand-dark),#2563EB 62%,#0F9F92);box-shadow:0 18px 40px rgba(47,111,237,.30)}
    .btn-secondary{background:#fff;color:#1F2937;border-color:#E2E8F0}
    .btn-secondary:hover{transform:translateY(-2px);background:#F1F6FF;color:var(--brand-dark);border-color:#BFDBFE}
    .btn:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
      outline:none;
      box-shadow:0 0 0 4px rgba(47,111,237,.20);
    }
    .mobile-panel{
      display:none;
      border-top:1px solid #E2E8F0;
      background:rgba(255,255,255,.96);
    }
    .mobile-panel.open{display:block}
    .section{padding:92px 0}
    .section-tight{padding:64px 0}
    .badge{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:var(--brand-soft);
      color:var(--brand-dark);
      font-size:13px;
      font-weight:800;
      border:1px solid rgba(47,111,237,.12);
    }
    .badge-teal{background:var(--accent-soft);color:#0F766E;border-color:rgba(20,184,166,.18)}
    .card{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(226,232,240,.9);
      border-radius:var(--radius-card);
      box-shadow:0 10px 30px rgba(15,23,42,.045);
      transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease,background .24s ease;
    }
    .card:hover{
      transform:translateY(-4px);
      box-shadow:var(--shadow-card);
      border-color:rgba(147,197,253,.85);
      background:#fff;
    }
    .hero-compact{
      position:relative;
      overflow:hidden;
      padding:74px 0 54px;
      background:
        linear-gradient(115deg,rgba(255,255,255,.96),rgba(234,242,255,.72)),
        url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
      border-bottom:1px solid rgba(226,232,240,.72);
    }
    .hero-compact:before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 22% 26%, rgba(47,111,237,.13), transparent 28%),
        linear-gradient(90deg,rgba(255,255,255,.94),rgba(255,255,255,.72));
      pointer-events:none;
    }
    .hero-compact>*{position:relative}
    .channel-pill{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:40px;
      padding:0 16px;
      border-radius:999px;
      border:1px solid #E2E8F0;
      background:#fff;
      color:#475569;
      font-size:14px;
      font-weight:800;
      transition:all .2s ease;
      white-space:nowrap;
    }
    .channel-pill:hover{border-color:#93C5FD;color:var(--brand-dark);background:#F1F6FF}
    .channel-pill.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 12px 24px rgba(47,111,237,.22)}
    .resource-card{
      display:grid;
      grid-template-columns:112px 1fr;
      gap:20px;
      padding:18px;
      border-radius:24px;
      background:#fff;
      border:1px solid #E2E8F0;
      box-shadow:0 8px 24px rgba(15,23,42,.04);
      transition:all .22s ease;
    }
    .resource-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-card);border-color:#BFDBFE}
    .resource-thumb{
      min-height:104px;
      border-radius:20px;
      overflow:hidden;
      background:linear-gradient(135deg,#EAF2FF,#CCFBF1);
    }
    .resource-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
    .resource-card:hover img{transform:scale(1.04)}
    .icon-tile{
      width:46px;
      height:46px;
      border-radius:18px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      background:#F1F6FF;
      color:var(--brand-dark);
      flex:0 0 auto;
    }
    .sidebar-sticky{position:sticky;top:98px}
    details.faq-item{
      border:1px solid #E2E8F0;
      border-radius:20px;
      background:#fff;
      padding:0;
      overflow:hidden;
      transition:all .2s ease;
    }
    details.faq-item:hover{border-color:#BFDBFE}
    details.faq-item[open]{background:#F8FBFF;border-color:#93C5FD}
    details.faq-item summary{
      list-style:none;
      cursor:pointer;
      padding:18px 20px;
      font-weight:800;
      color:#0F172A;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
    }
    details.faq-item summary::-webkit-details-marker{display:none}
    details.faq-item summary:after{
      content:"+";
      width:26px;
      height:26px;
      border-radius:999px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      background:#EAF2FF;
      color:var(--brand-dark);
      font-weight:900;
      flex:0 0 auto;
    }
    details.faq-item[open] summary:after{content:"−";background:var(--brand);color:#fff}
    details.faq-item p{padding:0 20px 18px;margin:0;color:#64748B;font-size:14px;line-height:1.75}
    .input{
      width:100%;
      height:46px;
      border:1px solid #E2E8F0;
      border-radius:16px;
      background:#F8FAFC;
      padding:0 14px;
      outline:none;
      transition:all .2s ease;
      color:#0F172A;
    }
    .input:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(47,111,237,.12)}
    .footer-link{color:#CBD5E1;font-size:14px;transition:color .2s ease}
    .footer-link:hover{color:#fff}
    @media (max-width:1024px){
      .section{padding:72px 0}
      .hero-compact{padding:54px 0 42px}
      .sidebar-sticky{position:static}
    }
    @media (max-width:640px){
      .site-container{width:min(100% - 32px,1280px)}
      .section{padding:58px 0}
      .section-tight{padding:46px 0}
      .resource-card{grid-template-columns:1fr}
      .resource-thumb{min-height:176px}
      .btn{width:100%}
      .hero-compact{padding:42px 0 34px}
    }