/* roulang page: index */
:root{
      --bg:#f4f8fc;
      --bg-soft:#eef5fb;
      --surface:#ffffff;
      --surface-2:#f8fbff;
      --text:#162435;
      --muted:#6f8096;
      --line:#d9e4ef;
      --line-2:#c9d8e6;
      --primary:#315c93;
      --primary-2:#4d78b6;
      --primary-soft:#e7f0fb;
      --accent:#2aa7c9;
      --accent-soft:#e6f7fb;
      --success:#2f9b72;
      --warning:#c68b2e;
      --danger:#c55c5c;
      --shadow:0 16px 40px rgba(35,62,98,.08);
      --shadow-sm:0 10px 24px rgba(35,62,98,.06);
      --radius:18px;
      --radius-lg:26px;
      --radius-sm:12px;
      --container:1180px;
      --transition:all .22s ease;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(80,134,196,.08), transparent 35%),
        radial-gradient(circle at right top, rgba(42,167,201,.08), transparent 28%),
        var(--bg);
      font-family: "PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      line-height:1.72;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none;transition:var(--transition)}
    a:hover{color:var(--primary)}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    ::selection{background:rgba(49,92,147,.16)}
    .container-wide{max-width:var(--container)}
    .section-block{padding:78px 0}
    .section-block.alt{background:linear-gradient(180deg, rgba(255,255,255,.55), rgba(255,255,255,.8))}
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:1.2rem;
      margin-bottom:1.8rem;
      flex-wrap:wrap;
    }
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:.5rem;
      padding:.42rem .8rem;
      border:1px solid var(--line);
      border-radius:999px;
      background:rgba(255,255,255,.8);
      color:var(--primary);
      font-size:.84rem;
      font-weight:700;
      letter-spacing:.02em;
      box-shadow:0 10px 20px rgba(25,42,66,.03);
    }
    .section-title{
      margin:.7rem 0 .35rem;
      font-size:clamp(1.5rem, 2vw, 2.2rem);
      line-height:1.18;
      letter-spacing:-.02em;
    }
    .section-desc{
      margin:0;
      color:var(--muted);
      max-width:62rem;
      font-size:1rem;
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:1030;
      backdrop-filter:saturate(180%) blur(8px);
    }
    .site-navbar{
      background:rgba(247,250,253,.92);
      border-bottom:1px solid rgba(201,216,230,.8);
      box-shadow:0 6px 20px rgba(27,45,72,.03);
    }
    .site-navbar .navbar-brand{
      display:flex;
      align-items:center;
      gap:.8rem;
      padding:.35rem 0;
      font-weight:800;
      color:var(--text);
      letter-spacing:.01em;
    }
    .brand-mark{
      width:42px;height:42px;
      border-radius:14px;
      display:grid;place-items:center;
      color:#fff;
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      box-shadow:0 12px 24px rgba(49,92,147,.18);
      flex:none;
    }
    .brand-text{
      display:flex;
      flex-direction:column;
      line-height:1.1;
    }
    .brand-text small{
      color:var(--muted);
      font-weight:600;
      letter-spacing:.02em;
      margin-top:.25rem;
    }
    .nav-links{
      gap:.25rem;
      align-items:center;
    }
    .nav-links .nav-link{
      position:relative;
      padding:.86rem 1rem;
      color:var(--text);
      border-radius:999px;
      font-weight:700;
      font-size:.96rem;
    }
    .nav-links .nav-link:hover,
    .nav-links .nav-link:focus{
      color:var(--primary);
      background:rgba(49,92,147,.07);
    }
    .nav-links .nav-link.active{
      color:var(--primary);
      background:rgba(49,92,147,.1);
      box-shadow:inset 0 0 0 1px rgba(49,92,147,.08);
    }
    .nav-cta{
      display:flex;
      align-items:center;
      gap:.6rem;
      margin-left:1rem;
    }
    .btn-ui{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55rem;
      border-radius:999px;
      padding:.8rem 1.15rem;
      font-weight:700;
      border:1px solid transparent;
      transition:var(--transition);
      text-decoration:none;
      line-height:1;
      white-space:nowrap;
    }
    .btn-ui:focus{outline:none; box-shadow:0 0 0 .25rem rgba(49,92,147,.16)}
    .btn-primary-ui{
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      color:#fff;
      box-shadow:0 14px 28px rgba(49,92,147,.16);
    }
    .btn-primary-ui:hover{
      color:#fff;
      transform:translateY(-1px);
      box-shadow:0 18px 32px rgba(49,92,147,.20);
    }
    .btn-soft-ui{
      background:var(--primary-soft);
      color:var(--primary);
      border-color:rgba(49,92,147,.08);
    }
    .btn-soft-ui:hover{
      color:var(--primary);
      background:#dfeafb;
      transform:translateY(-1px);
    }
    .btn-outline-ui{
      background:rgba(255,255,255,.84);
      border-color:var(--line);
      color:var(--text);
    }
    .btn-outline-ui:hover{
      border-color:rgba(49,92,147,.2);
      color:var(--primary);
      transform:translateY(-1px);
    }
    .custom-toggler{
      border:1px solid var(--line);
      border-radius:14px;
      width:46px;height:46px;
      display:inline-grid;place-items:center;
      background:#fff;
      color:var(--primary);
    }
    .custom-toggler:focus{
      box-shadow:0 0 0 .25rem rgba(49,92,147,.15);
    }

    .offcanvas.site-offcanvas{
      background:linear-gradient(180deg, #fff, #f8fbff);
      border-left:1px solid var(--line);
      width:min(86vw, 360px);
    }
    .offcanvas .offcanvas-header{
      border-bottom:1px solid var(--line);
    }
    .offcanvas .mobile-links{
      display:flex;
      flex-direction:column;
      gap:.35rem;
      padding-top:.35rem;
    }
    .offcanvas .mobile-links a{
      padding:.95rem 1rem;
      border-radius:14px;
      background:var(--surface-2);
      border:1px solid rgba(217,228,239,.6);
      font-weight:700;
    }
    .offcanvas .mobile-links a:hover{
      background:#edf4fb;
      color:var(--primary);
      transform:translateX(2px);
    }
    .mobile-quick{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:.7rem;
      margin-top:1rem;
    }

    .hero-section{
      padding:34px 0 20px;
    }
    .hero-band{
      background:
        linear-gradient(180deg, rgba(255,255,255,.92), rgba(241,247,252,.94));
      border:1px solid rgba(217,228,239,.95);
      border-radius:28px;
      box-shadow:var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .hero-band:before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 20% 10%, rgba(49,92,147,.08), transparent 28%),
        radial-gradient(circle at 92% 16%, rgba(42,167,201,.08), transparent 20%);
      pointer-events:none;
    }
    .hero-inner{
      position:relative;
      padding:28px;
    }
    .hero-copy{
      padding:10px 0;
    }
    .hero-flag{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.45rem .82rem;
      border-radius:999px;
      background:rgba(42,167,201,.08);
      color:var(--primary);
      border:1px solid rgba(42,167,201,.16);
      font-weight:700;
      font-size:.86rem;
      margin-bottom:1rem;
    }
    .hero-title{
      font-size:clamp(2.1rem, 4.5vw, 4rem);
      line-height:1.02;
      letter-spacing:-.04em;
      margin:0 0 1rem;
      max-width:11ch;
    }
    .hero-desc{
      color:var(--muted);
      font-size:1.02rem;
      max-width:42rem;
      margin:0 0 1.5rem;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:.85rem;
      margin-bottom:1.2rem;
    }
    .hero-pills{
      display:flex;
      flex-wrap:wrap;
      gap:.6rem;
      margin-top:1rem;
    }
    .pill{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.58rem .82rem;
      border-radius:999px;
      background:#fff;
      border:1px solid var(--line);
      color:var(--muted);
      font-size:.88rem;
      box-shadow:0 8px 18px rgba(31,48,73,.04);
    }
    .hero-stack{
      display:grid;
      gap:.9rem;
      align-self:stretch;
    }
    .stack-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(217,228,239,.95);
      border-radius:22px;
      box-shadow:var(--shadow-sm);
      padding:1rem 1rem .95rem;
      transition:var(--transition);
      position:relative;
      overflow:hidden;
    }
    .stack-card:hover{
      transform:translateY(-2px);
      box-shadow:var(--shadow);
    }
    .stack-card .stack-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:.8rem;
      margin-bottom:.5rem;
    }
    .stack-card .stack-title{
      margin:0;
      font-size:1rem;
      font-weight:800;
    }
    .stack-card .stack-note{
      font-size:.86rem;
      color:var(--muted);
      margin:0;
    }
    .stack-card .stack-badge{
      padding:.38rem .62rem;
      border-radius:999px;
      font-size:.78rem;
      font-weight:700;
      background:var(--primary-soft);
      color:var(--primary);
      white-space:nowrap;
    }
    .stack-card .mini-list{
      margin:0;
      padding:0;
      list-style:none;
      display:grid;
      gap:.6rem;
    }
    .stack-card .mini-list li{
      display:flex;
      gap:.7rem;
      align-items:flex-start;
      color:var(--text);
      font-size:.92rem;
    }
    .stack-card .mini-list i{
      color:var(--accent);
      margin-top:.16rem;
    }
    .stack-card .mini-chip-row{
      display:flex;
      flex-wrap:wrap;
      gap:.45rem;
      margin-top:.6rem;
    }
    .mini-chip{
      font-size:.78rem;
      padding:.32rem .55rem;
      border-radius:999px;
      background:#f4f8fd;
      color:#5c7088;
      border:1px solid rgba(217,228,239,.8);
    }

    .feature-card,
    .metric-card,
    .showcase-card,
    .news-card,
    .step-card,
    .contact-card,
    .info-card,
    .footer-card{
      background:rgba(255,255,255,.93);
      border:1px solid rgba(217,228,239,.96);
      border-radius:var(--radius);
      box-shadow:var(--shadow-sm);
      transition:var(--transition);
      overflow:hidden;
    }
    .feature-card:hover,
    .metric-card:hover,
    .showcase-card:hover,
    .news-card:hover,
    .step-card:hover,
    .contact-card:hover,
    .info-card:hover{
      transform:translateY(-3px);
      box-shadow:var(--shadow);
    }
    .feature-card{
      height:100%;
      padding:1.3rem;
    }
    .feature-icon{
      width:50px;height:50px;
      border-radius:16px;
      display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(49,92,147,.12), rgba(42,167,201,.12));
      color:var(--primary);
      margin-bottom:1rem;
      font-size:1.15rem;
    }
    .feature-card h3{
      font-size:1.08rem;
      line-height:1.28;
      margin:0 0 .55rem;
      font-weight:800;
    }
    .feature-card p{
      margin:0 0 .9rem;
      color:var(--muted);
      font-size:.95rem;
      min-height:3.4em;
    }
    .feature-card .link-arrow{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      font-weight:700;
      color:var(--primary);
      font-size:.92rem;
    }

    .metric-card{
      padding:1.2rem 1.15rem;
      height:100%;
      position:relative;
    }
    .metric-card:after{
      content:"";
      position:absolute;
      inset:auto 0 0 0;
      height:4px;
      background:linear-gradient(90deg, var(--primary), var(--accent));
      opacity:.65;
    }
    .metric-value{
      font-size:clamp(1.9rem, 3vw, 2.5rem);
      line-height:1;
      font-weight:900;
      letter-spacing:-.03em;
      margin:0 0 .35rem;
      color:var(--text);
    }
    .metric-label{
      margin:0;
      color:var(--primary);
      font-weight:800;
      font-size:.92rem;
    }
    .metric-desc{
      margin:.45rem 0 0;
      color:var(--muted);
      font-size:.92rem;
    }

    .showcase-card{
      height:100%;
    }
    .thumb{
      aspect-ratio:16/9;
      background:
        linear-gradient(135deg, rgba(49,92,147,.12), rgba(42,167,201,.10)),
        linear-gradient(180deg, #eef5fc, #dce9f7);
      border-bottom:1px solid rgba(217,228,239,.85);
      position:relative;
      overflow:hidden;
    }
    .thumb:before{
      content:"";
      position:absolute;
      inset:14px;
      border:1px solid rgba(255,255,255,.65);
      border-radius:16px;
      background:
        linear-gradient(180deg, rgba(255,255,255,.28), rgba(255,255,255,.06));
    }
    .thumb .thumb-label{
      position:absolute;
      left:14px;
      bottom:14px;
      background:rgba(255,255,255,.9);
      color:var(--primary);
      padding:.35rem .62rem;
      border-radius:999px;
      font-size:.78rem;
      font-weight:800;
      box-shadow:0 8px 16px rgba(31,48,73,.08);
    }
    .showcase-body{
      padding:1rem 1.05rem 1.1rem;
    }
    .showcase-body h3{
      font-size:1.04rem;
      line-height:1.35;
      margin:0 0 .55rem;
      font-weight:800;
    }
    .showcase-body p{
      color:var(--muted);
      font-size:.93rem;
      margin:0 0 .95rem;
      min-height:3.1em;
    }
    .meta-row{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:.6rem;
      flex-wrap:wrap;
      font-size:.86rem;
      color:var(--muted);
    }
    .meta-row .badge-soft{
      padding:.35rem .6rem;
      border-radius:999px;
      background:var(--accent-soft);
      color:#19768d;
      border:1px solid rgba(42,167,201,.15);
      font-weight:700;
    }
    .tag-row{
      display:flex;
      flex-wrap:wrap;
      gap:.45rem;
      margin-bottom:.85rem;
    }
    .tag{
      padding:.34rem .58rem;
      border-radius:999px;
      background:#f3f7fb;
      color:#5f738a;
      font-size:.77rem;
      border:1px solid rgba(217,228,239,.76);
      font-weight:700;
    }

    .news-shell{
      display:grid;
      gap:1rem;
    }
    .news-list{
      display:grid;
      gap:.9rem;
    }
    .news-card{
      padding:1rem 1rem .95rem;
    }
    .news-card .news-top{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:.75rem;
      margin-bottom:.55rem;
    }
    .news-card .news-title{
      margin:0;
      font-size:1.02rem;
      font-weight:800;
      line-height:1.42;
    }
    .news-card .news-summary{
      margin:0 0 .9rem;
      color:var(--muted);
      font-size:.93rem;
    }
    .news-meta{
      display:flex;
      flex-wrap:wrap;
      gap:.45rem .75rem;
      align-items:center;
      color:var(--muted);
      font-size:.84rem;
    }
    .news-meta .dot{
      width:4px;height:4px;border-radius:50%;
      background:var(--line-2);
      display:inline-block;
      transform:translateY(-1px);
    }
    .news-link{
      display:inline-flex;
      align-items:center;
      gap:.4rem;
      margin-top:.8rem;
      color:var(--primary);
      font-weight:700;
      font-size:.9rem;
    }
    .empty-state{
      padding:2rem 1.4rem;
      text-align:center;
      border:1px dashed rgba(201,216,230,.95);
      border-radius:22px;
      background:rgba(255,255,255,.84);
      color:var(--muted);
    }
    .news-side{
      display:grid;
      gap:1rem;
    }
    .info-card{
      padding:1.1rem;
    }
    .info-card h3{
      font-size:1rem;
      font-weight:800;
      margin:0 0 .6rem;
    }
    .matrix{
      display:grid;
      gap:.7rem;
    }
    .matrix a{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:.9rem;
      padding:.95rem 1rem;
      background:var(--surface-2);
      border:1px solid rgba(217,228,239,.8);
      border-radius:16px;
      font-weight:700;
    }
    .matrix a:hover{
      background:#edf4fb;
      color:var(--primary);
      transform:translateY(-1px);
    }
    .matrix a span{
      color:var(--muted);
      font-weight:600;
      font-size:.86rem;
    }
    .badge-line{
      display:flex;
      flex-wrap:wrap;
      gap:.5rem;
      margin-top:.85rem;
    }
    .badge-line .pill{
      padding:.48rem .7rem;
      font-size:.82rem;
      background:#fff;
    }

    .steps-grid{
      display:grid;
      grid-template-columns:repeat(3, 1fr);
      gap:1rem;
    }
    .step-card{
      padding:1.2rem;
      position:relative;
      min-height:100%;
    }
    .step-num{
      width:44px;height:44px;
      border-radius:14px;
      display:grid;place-items:center;
      background:rgba(49,92,147,.1);
      color:var(--primary);
      font-weight:900;
      margin-bottom:1rem;
    }
    .step-card h3{
      font-size:1.04rem;
      margin:0 0 .55rem;
      font-weight:800;
    }
    .step-card p{
      margin:0;
      color:var(--muted);
      font-size:.94rem;
    }
    .step-card .step-foot{
      margin-top:1rem;
      display:flex;
      align-items:center;
      gap:.5rem;
      color:var(--primary);
      font-weight:700;
      font-size:.9rem;
    }

    .faq-wrap{
      background:linear-gradient(180deg, rgba(255,255,255,.8), rgba(248,251,255,.95));
      border:1px solid rgba(217,228,239,.9);
      border-radius:28px;
      padding:1.2rem;
      box-shadow:var(--shadow-sm);
    }
    .faq-accordion .accordion-item{
      border:1px solid rgba(217,228,239,.85);
      border-radius:18px;
      overflow:hidden;
      background:#fff;
      margin-bottom:.8rem;
      box-shadow:0 10px 22px rgba(29,47,77,.03);
    }
    .faq-accordion .accordion-button{
      padding:1rem 1.1rem;
      background:#fff;
      color:var(--text);
      font-weight:800;
      box-shadow:none;
    }
    .faq-accordion .accordion-button:not(.collapsed){
      color:var(--primary);
      background:linear-gradient(180deg, #fff, #f6faff);
    }
    .faq-accordion .accordion-button:focus{
      border-color:rgba(49,92,147,.18);
      box-shadow:0 0 0 .25rem rgba(49,92,147,.12);
    }
    .faq-accordion .accordion-body{
      padding:0 1.1rem 1.05rem;
      color:var(--muted);
      line-height:1.9;
    }

    .contact-wrap{
      display:grid;
      gap:1rem;
    }
    .contact-form-card{
      padding:1.2rem;
    }
    .form-label{
      font-weight:700;
      color:var(--text);
      margin-bottom:.45rem;
    }
    .form-control,
    .form-select{
      min-height:48px;
      border-radius:14px;
      border-color:var(--line);
      background:#fff;
      box-shadow:none;
      padding:.78rem .95rem;
    }
    .form-control:focus,
    .form-select:focus{
      border-color:rgba(49,92,147,.35);
      box-shadow:0 0 0 .25rem rgba(49,92,147,.12);
    }
    textarea.form-control{min-height:140px;resize:vertical}
    .help-note{
      margin-top:.6rem;
      color:var(--muted);
      font-size:.88rem;
    }
    .contact-side{
      display:grid;
      gap:1rem;
    }
    .contact-side .info-card p{
      color:var(--muted);
      margin-bottom:.8rem;
    }
    .contact-list{
      margin:0;
      padding:0;
      list-style:none;
      display:grid;
      gap:.7rem;
    }
    .contact-list li{
      display:flex;
      gap:.7rem;
      align-items:flex-start;
      color:var(--text);
      font-size:.94rem;
    }
    .contact-list i{
      color:var(--primary);
      margin-top:.18rem;
    }
    .mini-link-grid{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:.7rem;
      margin-top:.85rem;
    }
    .mini-link-grid a{
      padding:.86rem .9rem;
      border-radius:14px;
      border:1px solid rgba(217,228,239,.9);
      background:var(--surface-2);
      font-weight:700;
      text-align:center;
    }
    .mini-link-grid a:hover{
      color:var(--primary);
      background:#edf4fb;
    }

    .site-footer{
      margin-top:20px;
      padding:40px 0 22px;
      background:linear-gradient(180deg, #f8fbff, #eef5fb);
      border-top:1px solid rgba(217,228,239,.9);
    }
    .footer-card{
      padding:1.2rem;
      height:100%;
    }
    .footer-card h3{
      font-size:1rem;
      font-weight:800;
      margin:0 0 .85rem;
    }
    .footer-links{
      display:grid;
      gap:.65rem;
    }
    .footer-links a{
      color:var(--muted);
      font-weight:600;
      padding:.12rem 0;
    }
    .footer-links a:hover{color:var(--primary)}
    .footer-meta{
      margin-top:1.2rem;
      padding-top:1rem;
      border-top:1px solid rgba(201,216,230,.8);
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      justify-content:space-between;
      gap:.75rem;
      color:var(--muted);
      font-size:.9rem;
    }

    .breadcrumb-shell{
      margin:24px 0 0;
    }
    .crumb-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(217,228,239,.95);
      border-radius:20px;
      padding:.85rem 1rem;
      box-shadow:var(--shadow-sm);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:.8rem;
      flex-wrap:wrap;
    }
    .breadcrumb{
      margin:0;
    }
    .breadcrumb-item + .breadcrumb-item::before{
      color:#95a6b7;
    }
    .breadcrumb a{color:var(--muted);font-weight:600}
    .breadcrumb .active{color:var(--text)}
    .subnav-quick{
      display:flex;
      gap:.5rem;
      flex-wrap:wrap;
    }

    .content-divider{
      height:1px;
      background:linear-gradient(90deg, rgba(217,228,239,0), rgba(201,216,230,.95), rgba(217,228,239,0));
      margin:18px 0;
    }

    .floating-top{
      position:fixed;
      right:18px;
      bottom:18px;
      width:48px;height:48px;
      border-radius:16px;
      display:grid;place-items:center;
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      color:#fff;
      box-shadow:0 18px 34px rgba(49,92,147,.22);
      z-index:1025;
      border:none;
    }
    .floating-top:hover{transform:translateY(-2px); color:#fff}
    .floating-top:focus{box-shadow:0 0 0 .25rem rgba(49,92,147,.18)}

    @media (max-width: 1199.98px){
      .hero-title{max-width:13ch}
      .steps-grid{grid-template-columns:1fr}
    }
    @media (max-width: 991.98px){
      .nav-cta{display:none}
      .hero-inner{padding:22px}
      .section-block{padding:66px 0}
      .hero-title{max-width:100%}
      .hero-copy{padding-bottom:0}
      .hero-stack{margin-top:.5rem}
    }
    @media (max-width: 767.98px){
      .section-head{
        align-items:flex-start;
        flex-direction:column;
      }
      .section-block{padding:56px 0}
      .hero-section{padding-top:18px}
      .hero-inner{padding:18px}
      .hero-title{font-size:clamp(1.95rem, 9vw, 3rem)}
      .hero-actions .btn-ui{width:100%}
      .hero-pills{gap:.5rem}
      .pill{width:calc(50% - .25rem); justify-content:center}
      .mobile-quick{grid-template-columns:1fr}
      .mini-link-grid{grid-template-columns:1fr}
      .footer-meta{justify-content:flex-start}
    }
    @media (max-width: 575.98px){
      .site-navbar .navbar-brand{gap:.6rem}
      .brand-mark{width:38px;height:38px;border-radius:12px}
      .hero-inner{padding:16px}
      .hero-desc{font-size:.96rem}
      .pill{width:100%}
      .section-title{font-size:1.4rem}
      .btn-ui{padding:.78rem 1rem}
      .crumb-card{padding:.78rem .9rem}
      .faq-wrap{padding:.9rem}
      .accordion-button{font-size:.96rem}
      .floating-top{right:14px;bottom:14px}
    }

/* roulang page: article */
:root{
      --bg:#f4f8fc;
      --bg-soft:#eef5fb;
      --surface:#ffffff;
      --surface-2:#f8fbff;
      --text:#162435;
      --muted:#6f8096;
      --line:#d9e4ef;
      --line-2:#c9d8e6;
      --primary:#315c93;
      --primary-2:#4d78b6;
      --primary-soft:#e7f0fb;
      --accent:#2aa7c9;
      --accent-soft:#e6f7fb;
      --success:#2f9b72;
      --warning:#c68b2e;
      --danger:#c55c5c;
      --shadow:0 16px 40px rgba(35,62,98,.08);
      --shadow-sm:0 10px 24px rgba(35,62,98,.06);
      --radius:18px;
      --radius-lg:26px;
      --radius-sm:12px;
      --container:1180px;
      --transition:all .22s ease;
    }

    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(80,134,196,.08), transparent 35%),
        radial-gradient(circle at right top, rgba(42,167,201,.08), transparent 28%),
        var(--bg);
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      line-height:1.72;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    *{box-sizing:border-box}
    ::selection{background:rgba(49,92,147,.15); color:var(--text)}
    img{max-width:100%; display:block}
    a{color:inherit; text-decoration:none; transition:var(--transition)}
    a:hover{color:var(--primary)}
    button,input,textarea,select{font:inherit}
    .container-wide{max-width:var(--container)}
    .site-shell{min-height:100vh; display:flex; flex-direction:column}
    main{flex:1 0 auto}
    .section-block{padding:78px 0}
    .section-block.alt{
      background:linear-gradient(180deg, rgba(255,255,255,.55), rgba(255,255,255,.82));
      border-top:1px solid rgba(217,228,239,.55);
      border-bottom:1px solid rgba(217,228,239,.55);
    }
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:1.2rem;
      margin-bottom:1.8rem;
      flex-wrap:wrap;
    }
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:.5rem;
      padding:.42rem .8rem;
      border:1px solid var(--line);
      border-radius:999px;
      background:rgba(255,255,255,.82);
      color:var(--primary);
      font-size:.84rem;
      font-weight:700;
      letter-spacing:.02em;
      box-shadow:0 10px 20px rgba(25,42,66,.03);
    }
    .section-title{
      margin:.7rem 0 .35rem;
      font-size:clamp(1.5rem, 2vw, 2.2rem);
      line-height:1.18;
      letter-spacing:-.02em;
    }
    .section-desc{
      margin:0;
      color:var(--muted);
      max-width:62rem;
      font-size:1rem;
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:1030;
      backdrop-filter:saturate(180%) blur(8px);
    }
    .site-navbar{
      background:rgba(247,250,253,.92);
      border-bottom:1px solid rgba(201,216,230,.8);
      box-shadow:0 6px 20px rgba(27,45,72,.03);
    }
    .site-navbar .navbar-brand{
      display:flex;
      align-items:center;
      gap:.8rem;
      padding:.45rem 0;
      font-weight:800;
      color:var(--text);
      letter-spacing:.01em;
    }
    .brand-mark{
      width:42px;
      height:42px;
      border-radius:14px;
      display:grid;
      place-items:center;
      color:#fff;
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      box-shadow:0 12px 24px rgba(49,92,147,.18);
      flex:none;
    }
    .brand-text{
      display:flex;
      flex-direction:column;
      line-height:1.1;
    }
    .brand-text small{
      color:var(--muted);
      font-weight:600;
      letter-spacing:.02em;
      margin-top:.25rem;
    }
    .nav-links{
      gap:.25rem;
      align-items:center;
    }
    .nav-links .nav-link{
      position:relative;
      padding:.86rem 1rem;
      color:var(--text);
      border-radius:999px;
      font-weight:700;
      font-size:.96rem;
    }
    .nav-links .nav-link:hover,
    .nav-links .nav-link:focus{
      color:var(--primary);
      background:rgba(49,92,147,.07);
    }
    .nav-links .nav-link.active{
      color:var(--primary);
      background:rgba(49,92,147,.1);
      box-shadow:inset 0 0 0 1px rgba(49,92,147,.08);
    }
    .nav-note{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.64rem .92rem;
      border:1px solid rgba(49,92,147,.12);
      border-radius:999px;
      background:rgba(231,240,251,.72);
      color:var(--primary);
      font-size:.92rem;
      font-weight:700;
      box-shadow:var(--shadow-sm);
      white-space:nowrap;
    }
    .nav-note i{font-size:.9rem}
    .navbar-toggler{
      border:1px solid var(--line);
      background:rgba(255,255,255,.8);
      border-radius:14px;
      width:46px;
      height:46px;
      display:grid;
      place-items:center;
      color:var(--text);
      box-shadow:var(--shadow-sm);
      transition:var(--transition);
    }
    .navbar-toggler:hover{
      border-color:rgba(49,92,147,.18);
      color:var(--primary);
      transform:translateY(-1px);
    }
    .navbar-toggler:focus{
      box-shadow:0 0 0 .25rem rgba(49,92,147,.15);
      outline:none;
    }

    .offcanvas.site-offcanvas{
      background:linear-gradient(180deg, #fff, #f8fbff);
      border-left:1px solid var(--line);
      width:min(86vw, 360px);
    }
    .offcanvas .offcanvas-header{
      border-bottom:1px solid var(--line);
    }
    .offcanvas .mobile-links{
      display:flex;
      flex-direction:column;
      gap:.45rem;
      padding-top:.35rem;
    }
    .offcanvas .mobile-links a{
      padding:.98rem 1rem;
      border-radius:14px;
      background:var(--surface-2);
      border:1px solid rgba(217,228,239,.6);
      font-weight:700;
    }
    .offcanvas .mobile-links a:hover{
      background:#edf4fb;
      color:var(--primary);
      transform:translateX(2px);
    }
    .mobile-quick{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:.7rem;
      margin-top:1rem;
    }
    .mobile-quick .quick-chip{
      padding:.8rem .85rem;
      border-radius:14px;
      background:#f1f6fb;
      border:1px solid var(--line);
      color:var(--muted);
      font-size:.9rem;
      font-weight:700;
    }

    .hero-section{
      padding:34px 0 20px;
    }
    .hero-band{
      background:linear-gradient(180deg, rgba(255,255,255,.92), rgba(241,247,252,.94));
      border:1px solid rgba(217,228,239,.95);
      border-radius:28px;
      box-shadow:var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .hero-band:before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 20% 20%, rgba(80,134,196,.09), transparent 28%),
        radial-gradient(circle at 88% 8%, rgba(42,167,201,.08), transparent 26%);
      pointer-events:none;
    }
    .hero-band > .row{position:relative; z-index:1}
    .hero-left{
      padding:2rem 2rem 2rem 2rem;
    }
    .hero-right{
      padding:2rem 2rem 2rem 0;
    }
    .hero-kicker{
      display:inline-flex;
      align-items:center;
      gap:.5rem;
      padding:.42rem .82rem;
      border-radius:999px;
      background:rgba(231,240,251,.9);
      border:1px solid rgba(49,92,147,.12);
      color:var(--primary);
      font-weight:800;
      font-size:.84rem;
      letter-spacing:.02em;
      margin-bottom:1rem;
    }
    .hero-title{
      margin:0;
      font-size:clamp(2rem, 4vw, 3.45rem);
      line-height:1.08;
      letter-spacing:-.03em;
      font-weight:900;
    }
    .hero-lead{
      margin:1rem 0 0;
      color:var(--muted);
      max-width:56rem;
      font-size:1.02rem;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:.85rem;
      margin-top:1.35rem;
    }
    .btn-ui{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55rem;
      border-radius:999px;
      padding:.8rem 1.15rem;
      font-weight:700;
      border:1px solid transparent;
      transition:var(--transition);
      text-decoration:none;
      line-height:1;
      white-space:nowrap;
      cursor:pointer;
    }
    .btn-ui:focus{
      outline:none;
      box-shadow:0 0 0 .25rem rgba(49,92,147,.16);
    }
    .btn-primary-ui{
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      color:#fff;
      box-shadow:0 14px 28px rgba(49,92,147,.16);
    }
    .btn-primary-ui:hover{
      color:#fff;
      transform:translateY(-1px);
      box-shadow:0 18px 32px rgba(49,92,147,.20);
    }
    .btn-soft-ui{
      background:var(--primary-soft);
      color:var(--primary);
      border-color:rgba(49,92,147,.08);
    }
    .btn-soft-ui:hover{
      color:var(--primary);
      background:#dfeafb;
      transform:translateY(-1px);
    }
    .btn-outline-ui{
      background:rgba(255,255,255,.84);
      border-color:var(--line);
      color:var(--text);
    }
    .btn-outline-ui:hover{
      border-color:rgba(49,92,147,.2);
      color:var(--primary);
      transform:translateY(-1px);
    }
    .hero-tags{
      display:flex;
      flex-wrap:wrap;
      gap:.6rem;
      margin-top:1.2rem;
    }
    .pill-tag{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.48rem .8rem;
      border-radius:999px;
      background:#fff;
      border:1px solid var(--line);
      color:var(--muted);
      font-size:.88rem;
      font-weight:700;
      box-shadow:0 10px 22px rgba(25,42,66,.04);
    }
    .pill-tag strong{color:var(--text); font-weight:800}
    .hero-panel{
      background:rgba(255,255,255,.9);
      border:1px solid var(--line);
      border-radius:24px;
      box-shadow:var(--shadow-sm);
      padding:1.15rem;
      margin-top:.15rem;
    }
    .profile-top{
      display:flex;
      align-items:center;
      gap:1rem;
      padding-bottom:1rem;
      border-bottom:1px solid rgba(217,228,239,.8);
      margin-bottom:1rem;
    }
    .profile-avatar{
      width:58px;
      height:58px;
      border-radius:18px;
      background:linear-gradient(135deg, rgba(49,92,147,.12), rgba(42,167,201,.12));
      border:1px solid rgba(49,92,147,.14);
      color:var(--primary);
      display:grid;
      place-items:center;
      font-size:1.35rem;
      flex:none;
    }
    .profile-name{
      font-size:1.05rem;
      font-weight:900;
      margin:0;
      line-height:1.2;
    }
    .profile-sub{
      margin:.2rem 0 0;
      color:var(--muted);
      font-size:.92rem;
    }
    .profile-meta{
      display:grid;
      grid-template-columns:repeat(2, minmax(0, 1fr));
      gap:.8rem;
      margin-bottom:1rem;
    }
    .meta-mini{
      border:1px solid rgba(217,228,239,.85);
      border-radius:16px;
      background:var(--surface-2);
      padding:.82rem .9rem;
      min-height:84px;
    }
    .meta-mini span{
      display:block;
      color:var(--muted);
      font-size:.82rem;
      margin-bottom:.2rem;
    }
    .meta-mini strong{
      display:block;
      font-size:1.02rem;
      color:var(--text);
      line-height:1.25;
    }
    .profile-note{
      padding:.95rem 1rem;
      border-radius:16px;
      background:linear-gradient(180deg, rgba(231,240,251,.85), rgba(245,249,253,.95));
      border:1px solid rgba(49,92,147,.12);
      color:var(--muted);
      font-size:.94rem;
    }

    .breadcrumb{
      margin:0;
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:.35rem;
      color:var(--muted);
      font-size:.92rem;
    }
    .breadcrumb-item{
      display:flex;
      align-items:center;
    }
    .breadcrumb-item + .breadcrumb-item::before{
      color:#98a8bb;
      padding-right:.5rem;
    }
    .breadcrumb a{
      color:var(--muted);
      font-weight:700;
    }
    .breadcrumb a:hover{color:var(--primary)}
    .breadcrumb-item.active{
      color:var(--text);
      font-weight:800;
    }

    .content-card,
    .side-card,
    .feature-card,
    .metric-card,
    .showcase-card,
    .step-card,
    .footer-card,
    .contact-card,
    .empty-state{
      background:var(--surface);
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:var(--shadow-sm);
    }
    .content-card{padding:1.15rem}
    .content-toolbar{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      justify-content:space-between;
      gap:.8rem;
      padding-bottom:1rem;
      border-bottom:1px solid rgba(217,228,239,.85);
      margin-bottom:1rem;
    }
    .toolbar-meta{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:.6rem;
    }
    .status-badge{
      display:inline-flex;
      align-items:center;
      gap:.4rem;
      padding:.42rem .72rem;
      border-radius:999px;
      border:1px solid rgba(49,92,147,.12);
      background:rgba(231,240,251,.9);
      color:var(--primary);
      font-size:.82rem;
      font-weight:800;
      white-space:nowrap;
    }
    .status-badge.alt{
      background:rgba(230,247,251,.9);
      color:#1e879f;
      border-color:rgba(42,167,201,.12);
    }
    .status-badge.warn{
      background:rgba(255,248,233,.92);
      color:#9b6b17;
      border-color:rgba(198,139,46,.14);
    }

    .article-content{
      color:var(--text);
      font-size:1rem;
      line-height:1.9;
      word-break:break-word;
    }
    .article-content > * + *{margin-top:1rem}
    .article-content h2,
    .article-content h3,
    .article-content h4{
      margin:2rem 0 1rem;
      line-height:1.28;
      letter-spacing:-.02em;
      font-weight:900;
      color:var(--text);
    }
    .article-content h2{
      font-size:1.5rem;
      padding-bottom:.65rem;
      border-bottom:1px solid rgba(217,228,239,.82);
    }
    .article-content h3{font-size:1.22rem}
    .article-content h4{font-size:1.08rem}
    .article-content p{margin:0; color:#22344a}
    .article-content a{
      color:var(--primary);
      text-decoration:underline;
      text-decoration-color:rgba(49,92,147,.22);
      text-underline-offset:.18em;
    }
    .article-content a:hover{
      color:var(--primary-2);
      text-decoration-color:rgba(77,120,182,.55);
    }
    .article-content ul,
    .article-content ol{
      padding-left:1.2rem;
      margin:0;
    }
    .article-content li + li{margin-top:.45rem}
    .article-content blockquote{
      margin:1.4rem 0;
      padding:1rem 1.1rem;
      border-left:4px solid rgba(49,92,147,.22);
      background:linear-gradient(180deg, rgba(231,240,251,.62), rgba(247,250,253,.96));
      border-radius:14px;
      color:#28405c;
    }
    .article-content blockquote p{color:inherit}
    .article-content hr{
      margin:1.7rem 0;
      border:0;
      border-top:1px solid rgba(217,228,239,.95);
      opacity:1;
    }
    .article-content img,
    .article-content video,
    .article-content iframe{
      max-width:100%;
      border-radius:18px;
      border:1px solid rgba(217,228,239,.9);
      box-shadow:0 12px 28px rgba(35,62,98,.08);
    }
    .article-content figure{
      margin:1.3rem 0;
      text-align:center;
    }
    .article-content figcaption{
      margin-top:.6rem;
      color:var(--muted);
      font-size:.88rem;
    }
    .article-content code{
      padding:.16rem .42rem;
      border-radius:8px;
      background:#eef4fb;
      color:#21405e;
      font-size:.92em;
    }
    .article-content pre{
      margin:1.2rem 0;
      padding:1rem 1.1rem;
      overflow:auto;
      background:#0f1f33;
      color:#e8f1ff;
      border-radius:16px;
      box-shadow:inset 0 0 0 1px rgba(255,255,255,.06);
    }
    .article-content pre code{
      padding:0;
      background:transparent;
      color:inherit;
    }
    .article-content table{
      width:100%;
      border-collapse:collapse;
      margin:1.2rem 0;
      display:block;
      overflow-x:auto;
      border:1px solid rgba(217,228,239,.95);
      border-radius:16px;
      box-shadow:var(--shadow-sm);
      background:#fff;
    }
    .article-content thead th{
      background:#f2f7fc;
      color:var(--text);
      font-weight:800;
    }
    .article-content th,
    .article-content td{
      padding:.9rem 1rem;
      border-bottom:1px solid rgba(217,228,239,.8);
      text-align:left;
      white-space:nowrap;
    }
    .article-content tbody tr:last-child td{border-bottom:none}
    .article-content .aligncenter,
    .article-content .alignleft,
    .article-content .alignright{
      max-width:100%;
    }

    .article-footer-actions{
      display:flex;
      flex-wrap:wrap;
      gap:.8rem;
      margin-top:1.2rem;
      padding-top:1rem;
      border-top:1px solid rgba(217,228,239,.85);
    }

    .sticky-aside{
      position:sticky;
      top:92px;
      display:grid;
      gap:1rem;
    }
    .side-card{
      padding:1.05rem;
    }
    .side-title{
      display:flex;
      align-items:center;
      gap:.5rem;
      margin:0 0 .85rem;
      font-size:1rem;
      font-weight:900;
    }
    .side-title i{color:var(--primary)}
    .side-list{
      display:grid;
      gap:.65rem;
    }
    .side-list a,
    .side-link{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:.9rem;
      padding:.82rem .88rem;
      border-radius:14px;
      border:1px solid rgba(217,228,239,.8);
      background:var(--surface-2);
      color:var(--text);
      transition:var(--transition);
    }
    .side-list a:hover,
    .side-link:hover{
      transform:translateY(-1px);
      border-color:rgba(49,92,147,.18);
      box-shadow:0 10px 22px rgba(35,62,98,.06);
      color:var(--primary);
    }
    .side-list strong{display:block; font-size:.94rem}
    .side-list small{display:block; color:var(--muted); font-size:.82rem; margin-top:.15rem}
    .side-pill{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.24rem .52rem;
      border-radius:999px;
      background:rgba(231,240,251,.95);
      color:var(--primary);
      font-size:.75rem;
      font-weight:800;
      flex:none;
      white-space:nowrap;
    }
    .toc-list{
      display:grid;
      gap:.55rem;
      list-style:none;
      padding:0;
      margin:0;
    }
    .toc-list a{
      display:flex;
      align-items:center;
      gap:.65rem;
      padding:.62rem .7rem;
      border-radius:12px;
      background:#f5f9fd;
      border:1px solid rgba(217,228,239,.72);
      color:var(--text);
      font-weight:700;
      font-size:.92rem;
    }
    .toc-list a:hover{
      color:var(--primary);
      background:#edf4fb;
      transform:translateX(2px);
    }
    .toc-list .toc-index{
      width:22px;
      height:22px;
      border-radius:50%;
      display:inline-grid;
      place-items:center;
      background:rgba(49,92,147,.1);
      color:var(--primary);
      font-size:.76rem;
      font-weight:900;
      flex:none;
    }

    .feature-card{
      padding:1.15rem;
      height:100%;
      transition:var(--transition);
    }
    .feature-card:hover,
    .showcase-card:hover,
    .metric-card:hover,
    .step-card:hover{
      transform:translateY(-2px);
      box-shadow:0 18px 32px rgba(35,62,98,.09);
    }
    .feature-icon{
      width:48px;
      height:48px;
      border-radius:16px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg, rgba(49,92,147,.12), rgba(42,167,201,.12));
      color:var(--primary);
      font-size:1.1rem;
      margin-bottom:1rem;
      border:1px solid rgba(49,92,147,.12);
    }
    .feature-card h3,
    .showcase-card h3{
      margin:0 0 .55rem;
      font-size:1.06rem;
      font-weight:900;
      line-height:1.28;
    }
    .feature-card p,
    .showcase-card p{
      color:var(--muted);
      margin:0 0 .9rem;
      font-size:.95rem;
    }
    .inline-link{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      color:var(--primary);
      font-weight:800;
      font-size:.9rem;
    }
    .inline-link:hover{color:var(--primary-2)}

    .metric-card{
      padding:1.25rem 1.15rem;
      display:flex;
      align-items:flex-start;
      gap:1rem;
      min-height:100%;
    }
    .metric-num{
      width:62px;
      height:62px;
      border-radius:18px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg, rgba(49,92,147,.12), rgba(42,167,201,.12));
      color:var(--primary);
      font-size:1.55rem;
      font-weight:900;
      flex:none;
      border:1px solid rgba(49,92,147,.12);
    }
    .metric-body span{
      display:block;
      color:var(--muted);
      font-size:.84rem;
      font-weight:700;
      margin-bottom:.25rem;
    }
    .metric-body strong{
      display:block;
      font-size:1.04rem;
      line-height:1.3;
      margin-bottom:.35rem;
    }
    .metric-body p{
      margin:0;
      color:var(--muted);
      font-size:.92rem;
      line-height:1.7;
    }

    .showcase-card{
      overflow:hidden;
      height:100%;
    }
    .showcase-thumb{
      aspect-ratio:16/9;
      background:
        linear-gradient(135deg, rgba(49,92,147,.12), rgba(42,167,201,.08)),
        linear-gradient(180deg, rgba(255,255,255,.36), rgba(255,255,255,.12));
      border-bottom:1px solid rgba(217,228,239,.82);
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      padding:1rem;
    }
    .thumb-chip{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.35rem .65rem;
      border-radius:999px;
      background:rgba(255,255,255,.86);
      color:var(--primary);
      font-size:.76rem;
      font-weight:800;
      box-shadow:0 10px 20px rgba(35,62,98,.05);
    }
    .thumb-note{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.35rem .65rem;
      border-radius:999px;
      background:rgba(255,255,255,.86);
      color:var(--muted);
      font-size:.76rem;
      font-weight:800;
      box-shadow:0 10px 20px rgba(35,62,98,.05);
    }
    .showcase-body{
      padding:1.1rem;
    }
    .card-tags{
      display:flex;
      flex-wrap:wrap;
      gap:.45rem;
      margin-bottom:.8rem;
    }
    .mini-badge{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.3rem .58rem;
      border-radius:999px;
      background:var(--primary-soft);
      color:var(--primary);
      font-size:.76rem;
      font-weight:800;
      white-space:nowrap;
    }

    .step-card{
      padding:1.2rem;
      height:100%;
    }
    .step-index{
      width:44px;
      height:44px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      color:#fff;
      font-weight:900;
      box-shadow:0 12px 24px rgba(49,92,147,.18);
      margin-bottom:1rem;
    }
    .step-card h3{
      margin:0 0 .45rem;
      font-size:1.06rem;
      font-weight:900;
    }
    .step-card p{
      margin:0;
      color:var(--muted);
      font-size:.94rem;
    }

    .news-list{
      display:grid;
      gap:.75rem;
    }
    .news-item{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:1rem;
      padding:.95rem 1rem;
      border-radius:16px;
      border:1px solid rgba(217,228,239,.84);
      background:#fff;
      box-shadow:0 10px 20px rgba(35,62,98,.04);
      transition:var(--transition);
    }
    .news-item:hover{
      transform:translateY(-1px);
      border-color:rgba(49,92,147,.18);
      box-shadow:0 16px 28px rgba(35,62,98,.07);
    }
    .news-item h3{
      margin:0 0 .35rem;
      font-size:1rem;
      font-weight:900;
    }
    .news-item p{
      margin:0;
      color:var(--muted);
      font-size:.92rem;
      line-height:1.7;
      max-width:52rem;
    }
    .news-meta{
      display:flex;
      flex-wrap:wrap;
      gap:.45rem;
      margin-top:.6rem;
    }
    .news-side{
      flex:none;
      display:flex;
      flex-direction:column;
      align-items:flex-end;
      gap:.45rem;
    }
    .news-time{
      color:var(--muted);
      font-size:.84rem;
      white-space:nowrap;
    }

    .accordion{
      --bs-accordion-bg: transparent;
      --bs-accordion-border-color: transparent;
      --bs-accordion-active-bg: transparent;
      --bs-accordion-active-color: var(--text);
      --bs-accordion-btn-padding-x: 0;
      --bs-accordion-btn-padding-y: 1rem;
      --bs-accordion-body-padding-x: 0;
      --bs-accordion-body-padding-y: 0 0 1rem;
    }
    .accordion-item{
      background:var(--surface);
      border:1px solid var(--line);
      border-radius:18px !important;
      overflow:hidden;
      box-shadow:var(--shadow-sm);
      margin-bottom:.9rem;
    }
    .accordion-button{
      background:transparent;
      color:var(--text);
      font-weight:800;
      padding:1.1rem 1.15rem;
      box-shadow:none !important;
    }
    .accordion-button:not(.collapsed){
      color:var(--primary);
      background:rgba(231,240,251,.5);
    }
    .accordion-button::after{
      background-size:1rem;
      width:1rem;
      height:1rem;
      transition:var(--transition);
    }
    .accordion-body{
      padding:0 1.15rem 1.05rem;
      color:var(--muted);
      line-height:1.85;
    }
    .accordion-button:focus{
      box-shadow:0 0 0 .25rem rgba(49,92,147,.12) !important;
    }

    .form-control,
    .form-select{
      border-radius:14px;
      border-color:var(--line);
      min-height:48px;
      background:#fff;
      color:var(--text);
      box-shadow:none;
      transition:var(--transition);
    }
    .form-control::placeholder{color:#95a5b8}
    .form-control:focus,
    .form-select:focus{
      border-color:rgba(49,92,147,.35);
      box-shadow:0 0 0 .25rem rgba(49,92,147,.12);
    }
    .form-label{
      font-weight:800;
      color:var(--text);
      margin-bottom:.45rem;
    }
    textarea.form-control{
      min-height:140px;
      resize:vertical;
    }
    .contact-card{
      padding:1.15rem;
      height:100%;
    }
    .contact-note{
      color:var(--muted);
      margin:0;
    }
    .contact-rows{
      display:grid;
      gap:.75rem;
      margin-top:1rem;
    }
    .contact-row{
      padding:.85rem .95rem;
      border-radius:16px;
      border:1px solid rgba(217,228,239,.82);
      background:var(--surface-2);
    }
    .contact-row span{
      display:block;
      color:var(--muted);
      font-size:.82rem;
      margin-bottom:.15rem;
      font-weight:700;
    }
    .contact-row strong{
      display:block;
      font-size:1rem;
      color:var(--text);
      line-height:1.35;
    }

    .empty-state{
      padding:3rem 1.4rem;
      text-align:center;
      max-width:760px;
      margin:0 auto;
    }
    .empty-state-icon{
      width:76px;
      height:76px;
      border-radius:24px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg, rgba(49,92,147,.12), rgba(42,167,201,.12));
      color:var(--primary);
      font-size:1.6rem;
      margin:0 auto 1rem;
      border:1px solid rgba(49,92,147,.12);
    }
    .empty-state h2{
      margin:0 0 .7rem;
      font-weight:900;
      letter-spacing:-.02em;
    }
    .empty-state p{
      margin:0 auto 1.2rem;
      color:var(--muted);
      max-width:44rem;
    }

    .site-footer{
      padding:34px 0 20px;
      background:linear-gradient(180deg, rgba(255,255,255,.65), rgba(245,249,252,.95));
      border-top:1px solid rgba(217,228,239,.85);
      flex:0 0 auto;
    }
    .footer-card{
      padding:1.15rem;
      height:100%;
    }
    .footer-card h3{
      margin:0 0 .85rem;
      font-size:1.02rem;
      font-weight:900;
    }
    .footer-card p{
      color:var(--muted);
      margin:0;
      line-height:1.75;
    }
    .footer-links{
      display:grid;
      gap:.55rem;
    }
    .footer-links a{
      color:var(--muted);
      font-weight:700;
    }
    .footer-links a:hover{color:var(--primary)}
    .footer-meta{
      margin-top:1rem;
      padding-top:1rem;
      border-top:1px solid rgba(217,228,239,.85);
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:1rem;
      flex-wrap:wrap;
      color:var(--muted);
      font-size:.92rem;
    }

    .callout-box{
      padding:1rem 1.1rem;
      border-radius:16px;
      background:linear-gradient(180deg, rgba(231,240,251,.82), rgba(247,250,253,.98));
      border:1px solid rgba(49,92,147,.12);
      color:var(--muted);
      line-height:1.8;
    }

    .gap-12{gap:12px}
    .mt-18{margin-top:18px}
    .mb-18{margin-bottom:18px}

    @media (max-width: 1199.98px){
      .hero-left{padding:1.7rem 1.7rem 1.7rem 1.7rem}
      .hero-right{padding:1.7rem 1.7rem 1.7rem 0}
      .section-block{padding:70px 0}
    }
    @media (max-width: 991.98px){
      .hero-right{padding:0 1.7rem 1.7rem 1.7rem}
      .sticky-aside{position:static}
      .section-head{align-items:flex-start}
      .footer-meta{align-items:flex-start}
    }
    @media (max-width: 767.98px){
      .section-block{padding:58px 0}
      .hero-section{padding:24px 0 14px}
      .hero-left,
      .hero-right{
        padding:1.35rem;
      }
      .hero-title{
        font-size:clamp(1.8rem, 8vw, 2.5rem);
      }
      .hero-band{
        border-radius:24px;
      }
      .profile-meta{
        grid-template-columns:1fr;
      }
      .content-card,
      .side-card,
      .feature-card,
      .metric-card,
      .showcase-card,
      .step-card,
      .footer-card,
      .contact-card{
        border-radius:16px;
      }
      .metric-card{
        flex-direction:column;
      }
      .news-item{
        flex-direction:column;
      }
      .news-side{
        align-items:flex-start;
      }
      .footer-meta{
        flex-direction:column;
      }
    }
    @media (max-width: 575.98px){
      .hero-left,
      .hero-right{
        padding:1rem;
      }
      .hero-actions .btn-ui{
        width:100%;
      }
      .section-title{
        font-size:1.45rem;
      }
      .nav-note{
        padding:.55rem .72rem;
        font-size:.84rem;
      }
      .content-card{
        padding:1rem;
      }
      .accordion-button{
        padding:1rem;
      }
      .accordion-body{
        padding:0 1rem 1rem;
      }
      .empty-state{
        padding:2.2rem 1rem;
      }
    }

/* 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}