/* roulang page: index */
:root{
      --bg: #f8fafc;
      --bg-soft: #eef6ff;
      --bg-alt: #f3f7fb;
      --card: #ffffff;
      --text: #0f172a;
      --muted: #475569;
      --soft: #64748b;
      --line: #e2e8f0;
      --line-strong: #cbd5e1;
      --primary: #2563eb;
      --primary-700: #1d4ed8;
      --primary-soft: rgba(37, 99, 235, 0.10);
      --accent: #f59e0b;
      --success: #16a34a;
      --danger: #dc2626;
      --shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.12);
      --radius: 18px;
      --radius-lg: 28px;
      --radius-sm: 14px;
      --section-y: 88px;
      --section-y-lg: 100px;
      --max: 1220px;
      --ease: all .24s ease;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(37,99,235,.08), transparent 28%),
        radial-gradient(circle at right 20%, rgba(14,165,233,.07), transparent 22%),
        var(--bg);
      line-height:1.7;
      overflow-x:hidden;
    }

    a{
      color:inherit;
      text-decoration:none;
      transition:var(--ease);
    }
    a:hover{color:var(--primary)}
    img{max-width:100%; height:auto}
    button, input, textarea, select{
      font:inherit;
    }
    ::selection{
      background:rgba(37,99,235,.16);
      color:var(--text);
    }

    .container-xl{
      max-width:var(--max);
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:1030;
      background:rgba(255,255,255,.96);
      border-bottom:1px solid rgba(226,232,240,.92);
      box-shadow:0 10px 30px rgba(15,23,42,.04);
    }

    .header-inner{
      padding:14px 0 12px;
    }

    .brand-row{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      min-height:64px;
    }

    .brand-mark{
      display:flex;
      align-items:center;
      gap:14px;
      min-width:0;
    }

    .brand-icon{
      width:46px;
      height:46px;
      border-radius:16px;
      display:grid;
      place-items:center;
      flex:0 0 auto;
      color:#fff;
      font-weight:800;
      letter-spacing:.04em;
      background:
        linear-gradient(135deg, var(--primary), #60a5fa);
      box-shadow:0 14px 30px rgba(37,99,235,.22);
      position:relative;
    }
    .brand-icon::after{
      content:"";
      position:absolute;
      inset:7px;
      border-radius:12px;
      border:1px solid rgba(255,255,255,.26);
    }

    .brand-copy{
      display:flex;
      flex-direction:column;
      min-width:0;
    }

    .brand-copy strong{
      font-size:1.06rem;
      line-height:1.1;
      color:var(--text);
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }

    .brand-copy span{
      margin-top:4px;
      font-size:.92rem;
      color:var(--soft);
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }

    .header-tools{
      display:flex;
      align-items:center;
      gap:12px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }

    .header-note{
      padding:10px 14px;
      border-radius:999px;
      background:#f8fbff;
      border:1px solid var(--line);
      color:var(--muted);
      font-size:.92rem;
      white-space:nowrap;
    }

    .mini-search{
      display:flex;
      align-items:center;
      gap:10px;
      padding:10px 14px;
      border:1px solid var(--line);
      border-radius:999px;
      background:#fff;
      min-width:250px;
      box-shadow:0 10px 28px rgba(15,23,42,.04);
    }
    .mini-search svg{
      color:var(--primary);
      flex:0 0 auto;
    }
    .mini-search span{
      color:var(--soft);
      font-size:.94rem;
      flex:1 1 auto;
      min-width:0;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }

    .channel-row{
      display:flex;
      align-items:center;
      gap:10px;
      padding:0 0 14px;
      overflow-x:auto;
      scrollbar-width:none;
    }
    .channel-row::-webkit-scrollbar{display:none}

    .channel-link{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:6px;
      padding:11px 16px;
      border-radius:999px;
      border:1px solid transparent;
      background:transparent;
      color:var(--muted);
      font-size:.96rem;
      white-space:nowrap;
      flex:0 0 auto;
    }
    .channel-link:hover{
      color:var(--primary);
      background:rgba(37,99,235,.06);
      border-color:rgba(37,99,235,.10);
    }
    .channel-link.active{
      color:var(--primary-700);
      background:var(--primary-soft);
      border-color:rgba(37,99,235,.16);
      box-shadow:0 10px 22px rgba(37,99,235,.10);
      font-weight:600;
    }
    .channel-link.cta{
      background:var(--primary);
      color:#fff;
      box-shadow:0 14px 28px rgba(37,99,235,.20);
    }
    .channel-link.cta:hover{
      background:var(--primary-700);
      color:#fff;
      transform:translateY(-1px);
    }

    .mobile-toggle{
      border:1px solid var(--line);
      background:#fff;
      color:var(--text);
      width:46px;
      height:46px;
      border-radius:14px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      box-shadow:0 10px 24px rgba(15,23,42,.05);
    }
    .mobile-toggle:hover{
      border-color:rgba(37,99,235,.2);
      color:var(--primary);
    }
    .mobile-toggle:focus,
    .channel-link:focus,
    .btn:focus,
    .form-control:focus,
    .accordion-button:focus{
      box-shadow:0 0 0 .22rem rgba(37,99,235,.18);
      outline:none;
    }

    .mobile-offcanvas{
      width:min(88vw, 360px);
      border-left:1px solid var(--line);
      background:#fff;
    }
    .mobile-offcanvas .offcanvas-header{
      padding:18px 20px 14px;
      border-bottom:1px solid var(--line);
    }
    .mobile-offcanvas .offcanvas-body{
      padding:18px 20px 24px;
    }
    .mobile-nav-links{
      display:grid;
      gap:10px;
    }
    .mobile-nav-links .channel-link{
      width:100%;
      justify-content:flex-start;
      background:#f8fbff;
      border-color:var(--line);
    }

    .hero-section{
      position:relative;
      padding:var(--section-y-lg) 0 84px;
      overflow:hidden;
    }
    .hero-section::before,
    .hero-section::after{
      content:"";
      position:absolute;
      border-radius:999px;
      pointer-events:none;
    }
    .hero-section::before{
      width:300px;
      height:300px;
      right:-120px;
      top:10px;
      background:radial-gradient(circle, rgba(37,99,235,.14), rgba(37,99,235,0) 68%);
    }
    .hero-section::after{
      width:260px;
      height:260px;
      left:-90px;
      bottom:10px;
      background:radial-gradient(circle, rgba(14,165,233,.13), rgba(14,165,233,0) 68%);
    }

    .hero-card{
      position:relative;
      z-index:1;
    }

    .hero-kicker{
      display:inline-flex;
      align-items:center;
      gap:10px;
      padding:8px 14px;
      border-radius:999px;
      background:#fff;
      border:1px solid var(--line);
      color:var(--primary-700);
      font-size:.92rem;
      box-shadow:0 10px 26px rgba(15,23,42,.05);
      margin-bottom:18px;
    }
    .kicker-dot{
      width:9px;
      height:9px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 6px rgba(245,158,11,.14);
    }

    .hero-section h1{
      margin:0;
      max-width:11.4em;
      font-size:clamp(2rem, 4vw, 3.15rem);
      line-height:1.16;
      letter-spacing:-.02em;
      color:var(--text);
      font-weight:800;
    }
    .hero-lead{
      margin:18px 0 0;
      max-width:42rem;
      font-size:1.04rem;
      line-height:1.82;
      color:var(--muted);
    }

    .hero-actions{
      display:flex;
      align-items:center;
      gap:12px;
      margin-top:28px;
      flex-wrap:wrap;
    }

    .btn{
      border-radius:999px;
      padding:12px 18px;
      border-width:1px;
      transition:var(--ease);
      font-weight:600;
      letter-spacing:.01em;
    }
    .btn-brand{
      background:var(--primary);
      color:#fff;
      border-color:var(--primary);
      box-shadow:0 18px 32px rgba(37,99,235,.18);
    }
    .btn-brand:hover{
      background:var(--primary-700);
      border-color:var(--primary-700);
      color:#fff;
      transform:translateY(-2px);
      box-shadow:0 22px 36px rgba(37,99,235,.22);
    }
    .btn-outline-brand{
      background:#fff;
      color:var(--primary);
      border-color:rgba(37,99,235,.22);
      box-shadow:0 12px 24px rgba(15,23,42,.04);
    }
    .btn-outline-brand:hover{
      background:rgba(37,99,235,.06);
      color:var(--primary-700);
      border-color:rgba(37,99,235,.34);
      transform:translateY(-2px);
    }
    .btn-light-soft{
      background:#fff;
      color:var(--text);
      border-color:var(--line);
    }

    .hero-trustbar{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:26px;
    }
    .trust-chip{
      padding:9px 14px;
      border-radius:999px;
      background:#fff;
      border:1px solid var(--line);
      color:var(--soft);
      font-size:.92rem;
    }

    .hero-panel{
      position:relative;
      z-index:1;
      background:
        linear-gradient(180deg, rgba(255,255,255,.94), rgba(255,255,255,.98)),
        #fff;
      border:1px solid rgba(226,232,240,.95);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-lg);
      padding:26px;
    }
    .hero-panel-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      margin-bottom:18px;
    }
    .hero-panel-head h2{
      margin:0;
      font-size:1.08rem;
      font-weight:700;
      color:var(--text);
    }
    .hero-panel-head span{
      color:var(--soft);
      font-size:.92rem;
    }

    .panel-grid{
      display:grid;
      grid-template-columns:repeat(2, minmax(0, 1fr));
      gap:14px;
    }

    .panel-card{
      padding:18px;
      border-radius:20px;
      background:#fff;
      border:1px solid rgba(226,232,240,.96);
      box-shadow:0 10px 24px rgba(15,23,42,.04);
      min-height:126px;
      transition:var(--ease);
    }
    .panel-card:hover{
      transform:translateY(-3px);
      box-shadow:0 18px 30px rgba(15,23,42,.08);
      border-color:rgba(37,99,235,.18);
    }

    .panel-card .mini-icon{
      width:44px;
      height:44px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg, rgba(37,99,235,.12), rgba(96,165,250,.16));
      color:var(--primary);
      margin-bottom:12px;
    }
    .panel-card h3{
      margin:0;
      font-size:1rem;
      font-weight:700;
      color:var(--text);
    }
    .panel-card p{
      margin:8px 0 0;
      color:var(--muted);
      font-size:.94rem;
      line-height:1.7;
    }

    .panel-footer{
      display:grid;
      grid-template-columns:repeat(4, minmax(0, 1fr));
      gap:12px;
      margin-top:18px;
      padding-top:18px;
      border-top:1px solid var(--line);
    }

    .mini-metric{
      padding:14px 12px;
      border-radius:18px;
      background:linear-gradient(180deg, #f8fbff, #ffffff);
      border:1px solid var(--line);
      text-align:center;
    }
    .mini-metric strong{
      display:block;
      font-size:1.08rem;
      color:var(--primary-700);
      line-height:1.15;
    }
    .mini-metric span{
      display:block;
      margin-top:6px;
      font-size:.88rem;
      color:var(--soft);
    }

    .section-wrap{
      padding:var(--section-y) 0;
    }
    .section-soft{
      background:linear-gradient(180deg, rgba(238,246,255,.7), rgba(248,250,252,0));
    }
    .section-alt{
      background:linear-gradient(180deg, rgba(243,247,251,.88), rgba(248,250,252,0));
    }

    .section-heading{
      margin-bottom:28px;
    }
    .section-heading .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:rgba(37,99,235,.08);
      color:var(--primary-700);
      font-size:.88rem;
      font-weight:600;
      margin-bottom:12px;
    }
    .section-heading h2{
      margin:0;
      font-size:clamp(1.65rem, 2.6vw, 2.35rem);
      line-height:1.2;
      letter-spacing:-.02em;
      color:var(--text);
      font-weight:800;
    }
    .section-heading p{
      margin:12px 0 0;
      max-width:46rem;
      color:var(--muted);
      font-size:1rem;
      line-height:1.85;
    }

    .section-lead-card,
    .feature-surface,
    .update-feature,
    .update-list-item,
    .stats-card,
    .compare-card,
    .testimonial-card,
    .faq-card,
    .cta-card,
    .content-box,
    .empty-state{
      background:var(--card);
      border:1px solid rgba(226,232,240,.95);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow);
    }

    .pain-layout{
      align-items:stretch;
    }
    .pain-overview{
      padding:30px;
      background:linear-gradient(180deg, #fff, #fbfdff);
    }
    .pain-overview .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--primary-700);
      font-weight:700;
      margin-bottom:12px;
    }
    .pain-overview h3{
      margin:0;
      font-size:1.68rem;
      font-weight:800;
      line-height:1.28;
      color:var(--text);
    }
    .pain-overview p{
      margin:14px 0 0;
      color:var(--muted);
      line-height:1.85;
      font-size:1rem;
    }
    .pain-note{
      margin-top:18px;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .pain-note .mini-tag{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:9px 12px;
      border-radius:999px;
      background:#f8fbff;
      border:1px solid var(--line);
      color:var(--soft);
      font-size:.9rem;
    }

    .pain-list{
      position:relative;
      display:grid;
      gap:16px;
    }
    .pain-item{
      position:relative;
      padding:22px 22px 22px 72px;
      border-radius:22px;
      background:#fff;
      border:1px solid rgba(226,232,240,.95);
      box-shadow:0 12px 26px rgba(15,23,42,.04);
      overflow:hidden;
    }
    .pain-item::before{
      content:"";
      position:absolute;
      left:31px;
      top:0;
      bottom:0;
      width:1px;
      background:linear-gradient(180deg, rgba(37,99,235,.25), rgba(37,99,235,0));
    }
    .pain-index{
      position:absolute;
      left:16px;
      top:20px;
      width:32px;
      height:32px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:var(--primary-soft);
      color:var(--primary-700);
      font-size:.9rem;
      font-weight:700;
      border:1px solid rgba(37,99,235,.14);
    }
    .pain-item h3{
      margin:0 0 8px;
      font-size:1.05rem;
      font-weight:700;
      color:var(--text);
    }
    .pain-item p{
      margin:0;
      color:var(--muted);
      line-height:1.8;
      font-size:.96rem;
    }

    .solutions-grid{
      display:grid;
      gap:20px;
    }
    .feature-surface{
      padding:30px;
      height:100%;
      background:
        radial-gradient(circle at right top, rgba(37,99,235,.08), transparent 28%),
        #fff;
    }
    .feature-surface h3{
      margin:0;
      font-size:1.55rem;
      font-weight:800;
      line-height:1.32;
    }
    .feature-surface p{
      margin:14px 0 0;
      color:var(--muted);
      line-height:1.85;
    }

    .feature-points{
      display:grid;
      gap:12px;
      margin-top:20px;
    }
    .feature-point{
      display:flex;
      align-items:flex-start;
      gap:12px;
      padding:13px 14px;
      border-radius:18px;
      background:#f8fbff;
      border:1px solid var(--line);
      color:var(--muted);
    }
    .feature-point i{
      width:28px;
      height:28px;
      flex:0 0 auto;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:var(--primary-soft);
      color:var(--primary-700);
      font-style:normal;
      font-weight:700;
      font-size:.86rem;
    }
    .feature-point span{
      line-height:1.65;
    }

    .solution-cards{
      display:grid;
      grid-template-columns:repeat(2, minmax(0,1fr));
      gap:16px;
    }
    .solution-card{
      padding:22px;
      border-radius:22px;
      background:#fff;
      border:1px solid rgba(226,232,240,.95);
      box-shadow:0 10px 24px rgba(15,23,42,.04);
      transition:var(--ease);
      position:relative;
      overflow:hidden;
    }
    .solution-card::after{
      content:"";
      position:absolute;
      right:-34px;
      top:-34px;
      width:110px;
      height:110px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(37,99,235,.10), rgba(37,99,235,0) 70%);
      pointer-events:none;
    }
    .solution-card:hover{
      transform:translateY(-3px);
      box-shadow:0 18px 34px rgba(15,23,42,.08);
      border-color:rgba(37,99,235,.18);
    }
    .solution-card.tall{
      min-height:220px;
    }
    .solution-card .card-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      margin-bottom:12px;
    }
    .solution-card .card-num{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-width:42px;
      height:42px;
      border-radius:14px;
      background:rgba(37,99,235,.08);
      color:var(--primary-700);
      font-weight:800;
    }
    .solution-card .card-link{
      color:var(--primary);
      font-size:.92rem;
      white-space:nowrap;
    }
    .solution-card h4{
      margin:0;
      font-size:1.06rem;
      font-weight:800;
      color:var(--text);
    }
    .solution-card p{
      margin:10px 0 0;
      color:var(--muted);
      line-height:1.75;
      font-size:.95rem;
    }

    .flow-strip{
      margin-top:18px;
      padding:18px;
      background:#fff;
      border:1px solid rgba(226,232,240,.95);
      border-radius:22px;
      box-shadow:var(--shadow);
    }
    .flow-line{
      display:grid;
      grid-template-columns:repeat(4, minmax(0,1fr));
      gap:12px;
    }
    .flow-step{
      padding:14px 14px 16px;
      border-radius:18px;
      background:#f8fbff;
      border:1px solid var(--line);
      text-align:center;
      color:var(--muted);
      font-size:.94rem;
    }
    .flow-step strong{
      display:block;
      color:var(--primary-700);
      margin-bottom:6px;
      font-size:1rem;
    }

    .updates-section{
      padding:var(--section-y) 0;
    }
    .update-feature{
      padding:28px;
      height:100%;
      background:
        linear-gradient(180deg, #fff, #fbfdff);
    }
    .update-meta{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      flex-wrap:wrap;
      margin-bottom:14px;
    }
    .badge-soft{
      display:inline-flex;
      align-items:center;
      padding:7px 11px;
      border-radius:999px;
      background:rgba(37,99,235,.10);
      color:var(--primary-700);
      border:1px solid rgba(37,99,235,.12);
      font-size:.84rem;
      font-weight:600;
    }
    .post-time{
      color:var(--soft);
      font-size:.88rem;
      white-space:nowrap;
    }
    .update-feature h3{
      margin:0;
      font-size:1.45rem;
      line-height:1.38;
      font-weight:800;
      color:var(--text);
    }
    .update-feature h3 a:hover{
      color:var(--primary-700);
    }
    .update-feature p{
      margin:14px 0 0;
      color:var(--muted);
      line-height:1.88;
      font-size:.98rem;
    }
    .read-link{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-top:20px;
      color:var(--primary);
      font-weight:700;
    }
    .read-link:hover{
      gap:10px;
      color:var(--primary-700);
    }

    .update-stack{
      display:grid;
      gap:14px;
    }
    .update-item{
      padding:20px;
      background:#fff;
      border:1px solid rgba(226,232,240,.95);
      border-radius:22px;
      box-shadow:0 10px 22px rgba(15,23,42,.04);
      transition:var(--ease);
    }
    .update-item:hover{
      transform:translateY(-2px);
      border-color:rgba(37,99,235,.18);
      box-shadow:0 16px 28px rgba(15,23,42,.08);
    }
    .update-item h4{
      margin:10px 0 0;
      font-size:1.03rem;
      font-weight:750;
      line-height:1.5;
      color:var(--text);
    }
    .update-item h4 a:hover{
      color:var(--primary-700);
    }
    .update-item p{
      margin:10px 0 0;
      color:var(--muted);
      font-size:.94rem;
      line-height:1.72;
      display:-webkit-box;
      -webkit-line-clamp:2;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }
    .update-grid-bottom{
      margin-top:16px;
    }

    .empty-state{
      padding:34px;
      text-align:center;
      background:linear-gradient(180deg, #fff, #fbfdff);
    }
    .empty-state .empty-icon{
      width:60px;
      height:60px;
      margin:0 auto 14px;
      border-radius:20px;
      display:grid;
      place-items:center;
      background:rgba(37,99,235,.08);
      color:var(--primary-700);
    }
    .empty-state h3{
      margin:0;
      font-size:1.18rem;
      font-weight:800;
      color:var(--text);
    }
    .empty-state p{
      margin:10px auto 0;
      max-width:26rem;
      color:var(--muted);
      line-height:1.8;
    }

    .results-band{
      display:grid;
      grid-template-columns:repeat(4, minmax(0,1fr));
      gap:14px;
      margin-bottom:18px;
    }
    .stats-card{
      padding:22px 18px;
      background:#fff;
      text-align:center;
      transition:var(--ease);
    }
    .stats-card:hover{
      transform:translateY(-3px);
      border-color:rgba(37,99,235,.18);
      box-shadow:0 18px 34px rgba(15,23,42,.08);
    }
    .stats-card .icon{
      width:46px;
      height:46px;
      margin:0 auto 12px;
      border-radius:16px;
      background:rgba(37,99,235,.08);
      color:var(--primary-700);
      display:grid;
      place-items:center;
    }
    .stats-card strong{
      display:block;
      font-size:1.15rem;
      font-weight:800;
      color:var(--text);
    }
    .stats-card span{
      display:block;
      margin-top:6px;
      color:var(--soft);
      font-size:.92rem;
      line-height:1.55;
    }

    .compare-grid{
      display:grid;
      grid-template-columns:repeat(2, minmax(0,1fr));
      gap:18px;
    }
    .compare-card{
      padding:28px;
      background:#fff;
    }
    .compare-card h3{
      margin:0;
      font-size:1.18rem;
      font-weight:800;
      color:var(--text);
    }
    .compare-card .label{
      display:inline-flex;
      margin-top:10px;
      padding:7px 11px;
      border-radius:999px;
      font-size:.84rem;
      font-weight:700;
    }
    .compare-card.before .label{
      background:rgba(245,158,11,.12);
      color:#b45309;
    }
    .compare-card.after .label{
      background:rgba(22,163,74,.10);
      color:#15803d;
    }
    .compare-list{
      margin:18px 0 0;
      padding:0;
      list-style:none;
      display:grid;
      gap:12px;
    }
    .compare-list li{
      position:relative;
      padding-left:28px;
      color:var(--muted);
      line-height:1.75;
    }
    .compare-list li::before{
      content:"";
      position:absolute;
      left:0;
      top:9px;
      width:16px;
      height:16px;
      border-radius:50%;
      background:var(--primary-soft);
      border:1px solid rgba(37,99,235,.14);
    }
    .compare-card.after .compare-list li::before{
      background:rgba(22,163,74,.12);
      border-color:rgba(22,163,74,.18);
    }

    .testimonial-scroller{
      display:grid;
      gap:16px;
      grid-template-columns:repeat(3, minmax(0,1fr));
    }
    .testimonial-card{
      padding:24px;
      background:#fff;
      transition:var(--ease);
      position:relative;
    }
    .testimonial-card:hover{
      transform:translateY(-3px);
      box-shadow:0 18px 34px rgba(15,23,42,.08);
    }
    .quote-mark{
      font-size:2.4rem;
      line-height:1;
      color:rgba(37,99,235,.18);
      position:absolute;
      top:14px;
      right:18px;
      font-weight:900;
    }
    .testimonial-head{
      display:flex;
      align-items:center;
      gap:14px;
      margin-bottom:12px;
    }
    .avatar{
      width:48px;
      height:48px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg, rgba(37,99,235,.12), rgba(96,165,250,.16));
      color:var(--primary-700);
      font-weight:800;
      flex:0 0 auto;
    }
    .person strong{
      display:block;
      color:var(--text);
      font-size:1rem;
    }
    .person span{
      display:block;
      color:var(--soft);
      font-size:.9rem;
      margin-top:3px;
    }
    .testimonial-card p{
      margin:10px 0 0;
      color:var(--muted);
      line-height:1.85;
    }

    .faq-card{
      padding:18px;
      background:#fff;
    }
    .accordion{
      --bs-accordion-border-color: transparent;
      --bs-accordion-bg: transparent;
      --bs-accordion-color: var(--text);
      --bs-accordion-btn-color: var(--text);
      --bs-accordion-btn-focus-box-shadow: none;
      --bs-accordion-active-bg: transparent;
      --bs-accordion-active-color: var(--primary-700);
      --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 0;
    }
    .accordion-item{
      border:0;
      border-bottom:1px solid var(--line);
      background:transparent;
    }
    .accordion-item:last-child{border-bottom:0}
    .accordion-button{
      padding:1rem 0;
      background:transparent;
      box-shadow:none;
      font-weight:700;
      color:var(--text);
      border-radius:0 !important;
    }
    .accordion-button::after{
      background-size:1rem;
      opacity:.65;
    }
    .accordion-button:not(.collapsed){
      color:var(--primary-700);
    }
    .accordion-body{
      padding:0 0 1rem;
      color:var(--muted);
      line-height:1.8;
    }

    .cta-shell{
      position:relative;
      overflow:hidden;
      padding:0;
      background:
        radial-gradient(circle at top right, rgba(37,99,235,.12), transparent 26%),
        radial-gradient(circle at left bottom, rgba(14,165,233,.10), transparent 26%),
        #fff;
    }
    .cta-inner{
      padding:30px;
    }
    .cta-title{
      margin:0;
      font-size:clamp(1.5rem, 2.4vw, 2.2rem);
      line-height:1.25;
      font-weight:800;
      color:var(--text);
    }
    .cta-desc{
      margin:12px 0 0;
      color:var(--muted);
      line-height:1.85;
      max-width:40rem;
    }
    .cta-points{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:18px;
    }
    .cta-points .mini-tag{
      padding:9px 12px;
      border-radius:999px;
      background:#f8fbff;
      border:1px solid var(--line);
      color:var(--soft);
      font-size:.92rem;
    }

    .contact-form{
      padding:24px;
      background:#fff;
      border:1px solid rgba(226,232,240,.95);
      border-radius:24px;
      box-shadow:var(--shadow);
    }
    .contact-form .form-label{
      font-weight:600;
      color:var(--text);
      margin-bottom:8px;
    }
    .form-control{
      border-radius:14px;
      border:1px solid var(--line-strong);
      padding:12px 14px;
      background:#fff;
      color:var(--text);
      transition:var(--ease);
    }
    .form-control::placeholder{
      color:#94a3b8;
    }
    .form-control:focus{
      border-color:rgba(37,99,235,.55);
      box-shadow:0 0 0 .22rem rgba(37,99,235,.12);
    }
    textarea.form-control{
      min-height:120px;
      resize:vertical;
    }
    .form-hint{
      margin-top:10px;
      color:var(--soft);
      font-size:.9rem;
      line-height:1.7;
    }

    .site-footer{
      background:#0f172a;
      color:#cbd5e1;
      margin-top:var(--section-y);
    }
    .footer-inner{
      padding:60px 0 24px;
    }
    .footer-brand{
      display:flex;
      align-items:center;
      gap:12px;
      margin-bottom:14px;
    }
    .footer-brand .brand-icon{
      width:42px;
      height:42px;
      border-radius:14px;
      box-shadow:none;
    }
    .footer-title{
      color:#fff;
      font-size:1.02rem;
      font-weight:800;
      margin:0;
    }
    .footer-desc{
      color:#94a3b8;
      line-height:1.85;
      margin:14px 0 0;
      max-width:26rem;
    }
    .footer-col h4{
      font-size:1rem;
      font-weight:700;
      color:#fff;
      margin:0 0 16px;
    }
    .footer-links{
      display:grid;
      gap:10px;
    }
    .footer-links a{
      color:#cbd5e1;
    }
    .footer-links a:hover{
      color:#fff;
      padding-left:4px;
    }
    .footer-note{
      margin-top:18px;
      padding:14px 16px;
      border-radius:18px;
      background:rgba(148,163,184,.08);
      border:1px solid rgba(148,163,184,.12);
      color:#cbd5e1;
      line-height:1.75;
      font-size:.92rem;
    }
    .footer-bottom{
      margin-top:34px;
      padding-top:18px;
      border-top:1px solid rgba(148,163,184,.16);
      display:flex;
      justify-content:space-between;
      gap:12px;
      flex-wrap:wrap;
      color:#94a3b8;
      font-size:.92rem;
    }
    .footer-bottom a{
      color:#cbd5e1;
    }

    .page-divider{
      height:1px;
      background:linear-gradient(90deg, transparent, rgba(148,163,184,.38), transparent);
      margin:0;
    }

    @media (max-width: 1199.98px){
      :root{--section-y:72px; --section-y-lg:84px;}
      .mini-search{min-width:220px}
      .panel-footer{grid-template-columns:repeat(2, minmax(0,1fr))}
      .testimonial-scroller{grid-template-columns:repeat(2, minmax(0,1fr))}
    }

    @media (max-width: 991.98px){
      .brand-row{
        min-height:58px;
      }
      .header-note,
      .mini-search{
        display:none;
      }
      .hero-section{
        padding-top:58px;
      }
      .hero-section h1{
        max-width:none;
      }
      .hero-panel{
        padding:22px;
      }
      .flow-line,
      .results-band,
      .compare-grid,
      .solution-cards{
        grid-template-columns:1fr 1fr;
      }
      .testimonial-scroller{
        grid-template-columns:1fr;
      }
      .panel-grid{
        grid-template-columns:1fr 1fr;
      }
    }

    @media (max-width: 767.98px){
      :root{--section-y:56px; --section-y-lg:64px;}
      .brand-row{
        align-items:flex-start;
      }
      .brand-copy strong{
        font-size:1rem;
      }
      .brand-copy span{
        white-space:normal;
        line-height:1.45;
      }
      .hero-section{
        padding-bottom:64px;
      }
      .hero-actions .btn{
        width:100%;
      }
      .hero-trustbar{
        gap:8px;
      }
      .trust-chip{
        width:100%;
        text-align:center;
      }
      .panel-grid,
      .panel-footer,
      .flow-line,
      .results-band,
      .compare-grid,
      .solution-cards{
        grid-template-columns:1fr;
      }
      .pain-item{
        padding:20px 18px 18px 64px;
      }
      .update-grid-bottom{
        margin-top:0;
      }
      .cta-inner{
        padding:24px;
      }
      .contact-form{
        padding:20px;
      }
      .footer-inner{
        padding-top:52px;
      }
      .footer-bottom{
        margin-top:26px;
      }
      .section-heading p,
      .hero-lead{
        font-size:.98rem;
      }
    }

    @media (max-width: 575.98px){
      .header-inner{
        padding-top:12px;
      }
      .brand-icon{
        width:42px;
        height:42px;
        border-radius:14px;
      }
      .hero-section h1{
        font-size:clamp(1.9rem, 8vw, 2.35rem);
      }
      .section-heading h2{
        font-size:1.5rem;
      }
      .pain-overview,
      .feature-surface,
      .update-feature,
      .compare-card,
      .stats-card,
      .testimonial-card,
      .faq-card,
      .empty-state{
        border-radius:22px;
      }
      .pain-item{
        border-radius:20px;
      }
      .solution-card,
      .update-item{
        border-radius:20px;
      }
      .btn{
        width:100%;
        justify-content:center;
      }
      .mobile-toggle{
        width:44px;
        height:44px;
      }
      .site-footer{
        margin-top:56px;
      }
    }

/* roulang page: article */
:root {
      --primary: #2563eb;
      --primary-dark: #1d4ed8;
      --primary-soft: #e0f2fe;
      --primary-pale: #eef6ff;
      --accent: #f59e0b;
      --success: #16a34a;
      --danger: #dc2626;
      --ink: #0f172a;
      --heading: #0f172a;
      --text: #475569;
      --muted: #64748b;
      --weak: #94a3b8;
      --border: #e2e8f0;
      --border-soft: rgba(148, 163, 184, .22);
      --bg: #f8fafc;
      --bg-alt: #f3f7fb;
      --card: #ffffff;
      --footer: #0f172a;
      --radius-sm: 10px;
      --radius-md: 16px;
      --radius-lg: 22px;
      --radius-xl: 30px;
      --shadow-sm: 0 8px 22px rgba(15, 23, 42, .06);
      --shadow-md: 0 16px 40px rgba(15, 23, 42, .08);
      --shadow-lg: 0 24px 70px rgba(37, 99, 235, .14);
      --section: 80px;
      --ease: all .24s ease;
      --font: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      margin: 0;
      min-height: 100vh;
      font-family: var(--font);
      font-size: 16px;
      line-height: 1.75;
      color: var(--text);
      background:
        radial-gradient(circle at 8% 0%, rgba(224, 242, 254, .85), transparent 34%),
        radial-gradient(circle at 92% 14%, rgba(37, 99, 235, .08), transparent 30%),
        var(--bg);
      text-rendering: optimizeLegibility;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--ease);
    }

    a:hover {
      color: var(--primary);
    }

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }

    button,
    input,
    textarea,
    select {
      font: inherit;
    }

    ::selection {
      color: #fff;
      background: var(--primary);
    }

    :focus-visible {
      outline: 3px solid rgba(37, 99, 235, .25);
      outline-offset: 3px;
      border-radius: 10px;
    }

    .container-xl {
      max-width: 1220px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: rgba(255, 255, 255, .96);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 8px 26px rgba(15, 23, 42, .04);
    }

    .brand-row {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand-link {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      min-width: 0;
    }

    .brand-icon,
    .footer-brand .brand-icon {
      width: 42px;
      height: 42px;
      flex: 0 0 42px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 14px;
      color: #fff;
      font-weight: 800;
      letter-spacing: .02em;
      background: linear-gradient(135deg, var(--primary), #38bdf8);
      box-shadow: 0 12px 28px rgba(37, 99, 235, .22);
    }

    .brand-copy {
      min-width: 0;
    }

    .brand-name {
      display: block;
      color: var(--heading);
      font-size: 20px;
      line-height: 1.25;
      font-weight: 800;
      letter-spacing: -.02em;
      white-space: nowrap;
    }

    .brand-slogan {
      display: block;
      margin-top: 2px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.3;
      white-space: nowrap;
    }

    .header-actions {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 12px;
      min-width: 0;
    }

    .search-pill {
      width: 270px;
      max-width: 28vw;
      height: 42px;
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 0 14px;
      color: var(--muted);
      font-size: 14px;
      border: 1px solid var(--border);
      border-radius: 999px;
      background: #fff;
      box-shadow: var(--shadow-sm);
    }

    .search-pill svg {
      width: 17px;
      height: 17px;
      color: var(--primary);
    }

    .btn-brand {
      --bs-btn-padding-x: 20px;
      --bs-btn-padding-y: 10px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: 1px solid transparent;
      border-radius: 999px;
      color: #fff;
      font-weight: 700;
      line-height: 1.35;
      background: var(--primary);
      box-shadow: 0 14px 32px rgba(37, 99, 235, .24);
      transition: var(--ease);
    }

    .btn-brand:hover,
    .btn-brand:focus {
      color: #fff;
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 18px 42px rgba(37, 99, 235, .30);
    }

    .btn-soft {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 20px;
      border: 1px solid rgba(37, 99, 235, .20);
      border-radius: 999px;
      color: var(--primary);
      font-weight: 700;
      background: #fff;
      transition: var(--ease);
    }

    .btn-soft:hover,
    .btn-soft:focus {
      color: var(--primary-dark);
      border-color: rgba(37, 99, 235, .36);
      background: var(--primary-soft);
      transform: translateY(-2px);
    }

    .menu-toggle {
      width: 42px;
      height: 42px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--heading);
      border: 1px solid var(--border);
      border-radius: 14px;
      background: #fff;
      box-shadow: var(--shadow-sm);
    }

    .menu-toggle span {
      width: 18px;
      height: 2px;
      position: relative;
      display: block;
      border-radius: 99px;
      background: currentColor;
    }

    .menu-toggle span::before,
    .menu-toggle span::after {
      content: "";
      position: absolute;
      left: 0;
      width: 18px;
      height: 2px;
      border-radius: 99px;
      background: currentColor;
    }

    .menu-toggle span::before {
      top: -6px;
    }

    .menu-toggle span::after {
      top: 6px;
    }

    .channel-wrap {
      border-top: 1px solid rgba(226, 232, 240, .74);
    }

    .channel-row {
      align-items: center;
      gap: 8px;
      min-height: 54px;
      overflow-x: auto;
      scrollbar-width: none;
    }

    .channel-row::-webkit-scrollbar {
      display: none;
    }

    .channel-link {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 36px;
      padding: 8px 14px;
      flex: 0 0 auto;
      color: var(--muted);
      font-size: 14px;
      font-weight: 700;
      line-height: 1;
      border: 1px solid transparent;
      border-radius: 999px;
      white-space: nowrap;
    }

    .channel-link:hover {
      color: var(--primary);
      background: var(--primary-soft);
    }

    .channel-link.active {
      color: var(--primary);
      border-color: rgba(37, 99, 235, .14);
      background: var(--primary-soft);
      box-shadow: 0 8px 22px rgba(37, 99, 235, .10);
    }

    .channel-link.cta {
      margin-left: auto;
      color: #fff;
      background: var(--ink);
    }

    .channel-link.cta:hover {
      color: #fff;
      background: var(--primary);
      transform: translateY(-1px);
    }

    .mobile-channel {
      display: flex;
      gap: 8px;
      padding: 0 0 14px;
      overflow-x: auto;
      scrollbar-width: none;
    }

    .mobile-channel::-webkit-scrollbar {
      display: none;
    }

    .offcanvas-custom {
      border-left: 1px solid var(--border);
      background: #fff;
    }

    .offcanvas-custom .offcanvas-header {
      padding: 22px;
      border-bottom: 1px solid var(--border);
    }

    .offcanvas-custom .offcanvas-body {
      padding: 20px 22px 28px;
    }

    .mobile-nav-list {
      display: grid;
      gap: 10px;
    }

    .mobile-nav-list a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 13px 14px;
      color: var(--heading);
      font-weight: 700;
      border: 1px solid var(--border);
      border-radius: 16px;
      background: var(--bg);
    }

    .mobile-nav-list a.active,
    .mobile-nav-list a:hover {
      color: var(--primary);
      border-color: rgba(37, 99, 235, .22);
      background: var(--primary-soft);
    }

    .article-hero {
      position: relative;
      padding: 54px 0 38px;
      overflow: hidden;
      background:
        linear-gradient(180deg, rgba(238, 246, 255, .82), rgba(248, 250, 252, 0)),
        radial-gradient(circle at 85% 10%, rgba(37, 99, 235, .11), transparent 32%);
    }

    .article-hero::before {
      content: "";
      position: absolute;
      right: 6%;
      top: 32px;
      width: 220px;
      height: 220px;
      border: 1px solid rgba(37, 99, 235, .10);
      border-radius: 50%;
      background: radial-gradient(circle, rgba(224, 242, 254, .76), transparent 68%);
      pointer-events: none;
    }

    .breadcrumb-shell {
      position: relative;
      z-index: 1;
      margin-bottom: 18px;
    }

    .breadcrumb {
      margin: 0;
      gap: 6px;
      color: var(--weak);
      font-size: 14px;
      font-weight: 600;
    }

    .breadcrumb-item a {
      color: var(--muted);
    }

    .breadcrumb-item a:hover {
      color: var(--primary);
    }

    .breadcrumb-item.active {
      color: var(--primary);
      max-width: 460px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .breadcrumb-item + .breadcrumb-item::before {
      color: var(--weak);
      content: "›";
    }

    .article-head-card {
      position: relative;
      z-index: 1;
      padding: 34px;
      border: 1px solid rgba(148, 163, 184, .20);
      border-radius: var(--radius-xl);
      background: rgba(255, 255, 255, .92);
      box-shadow: var(--shadow-md);
    }

    .article-kicker {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 18px;
    }

    .badge-custom {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 7px 11px;
      color: var(--primary);
      font-size: 13px;
      font-weight: 800;
      line-height: 1;
      border: 1px solid rgba(37, 99, 235, .16);
      border-radius: 999px;
      background: var(--primary-soft);
    }

    .badge-warm {
      color: #92400e;
      border-color: rgba(245, 158, 11, .20);
      background: rgba(245, 158, 11, .12);
    }

    .article-title {
      max-width: 920px;
      margin: 0;
      color: var(--heading);
      font-size: clamp(30px, 4.2vw, 44px);
      line-height: 1.18;
      font-weight: 800;
      letter-spacing: -.035em;
    }

    .article-summary {
      max-width: 850px;
      margin: 18px 0 0;
      color: var(--text);
      font-size: 17px;
      line-height: 1.85;
    }

    .article-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 18px;
      margin-top: 22px;
      padding-top: 20px;
      color: var(--muted);
      font-size: 14px;
      font-weight: 600;
      border-top: 1px solid var(--border);
    }

    .meta-item {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .meta-dot {
      width: 7px;
      height: 7px;
      border-radius: 99px;
      background: var(--primary);
      box-shadow: 0 0 0 4px rgba(37, 99, 235, .10);
    }

    .article-main {
      padding: 46px 0 84px;
    }

    .article-layout {
      display: grid;
      grid-template-columns: minmax(0, 820px) minmax(260px, 1fr);
      gap: 34px;
      align-items: start;
    }

    .reading-card {
      padding: 36px;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-xl);
      background: #fff;
      box-shadow: var(--shadow-sm);
    }

    .article-content {
      color: var(--text);
      font-size: 17px;
      line-height: 1.88;
      overflow-wrap: break-word;
    }

    .article-content > *:first-child {
      margin-top: 0;
    }

    .article-content h2,
    .article-content h3,
    .article-content h4 {
      color: var(--heading);
      line-height: 1.35;
      font-weight: 800;
      letter-spacing: -.02em;
    }

    .article-content h2 {
      margin: 42px 0 16px;
      padding-top: 8px;
      font-size: 27px;
      position: relative;
    }

    .article-content h2::before {
      content: "";
      display: block;
      width: 42px;
      height: 4px;
      margin-bottom: 12px;
      border-radius: 99px;
      background: linear-gradient(90deg, var(--primary), #38bdf8);
    }

    .article-content h3 {
      margin: 32px 0 12px;
      font-size: 22px;
    }

    .article-content h4 {
      margin: 24px 0 10px;
      font-size: 18px;
    }

    .article-content p {
      margin: 0 0 18px;
    }

    .article-content a {
      color: var(--primary);
      font-weight: 700;
      text-decoration: underline;
      text-decoration-color: rgba(37, 99, 235, .25);
      text-underline-offset: 4px;
    }

    .article-content a:hover {
      color: var(--primary-dark);
      text-decoration-color: var(--primary);
      background: rgba(224, 242, 254, .48);
    }

    .article-content ul,
    .article-content ol {
      margin: 18px 0 22px;
      padding-left: 1.35em;
    }

    .article-content li {
      margin: 8px 0;
      padding-left: 4px;
    }

    .article-content blockquote {
      margin: 28px 0;
      padding: 20px 24px;
      color: var(--heading);
      font-weight: 600;
      border-left: 5px solid var(--primary);
      border-radius: 0 18px 18px 0;
      background: var(--primary-pale);
    }

    .article-content img {
      width: auto;
      max-width: 100%;
      margin: 26px auto;
      border-radius: 18px;
      box-shadow: var(--shadow-sm);
    }

    .article-content table {
      width: 100%;
      margin: 28px 0;
      border-collapse: separate;
      border-spacing: 0;
      overflow: hidden;
      border: 1px solid var(--border);
      border-radius: 16px;
      background: #fff;
    }

    .article-content th,
    .article-content td {
      padding: 13px 15px;
      border-bottom: 1px solid var(--border);
      border-right: 1px solid var(--border);
      vertical-align: top;
    }

    .article-content th {
      color: var(--heading);
      font-weight: 800;
      background: var(--primary-pale);
    }

    .article-content tr:last-child td {
      border-bottom: 0;
    }

    .article-content th:last-child,
    .article-content td:last-child {
      border-right: 0;
    }

    .article-content pre,
    .article-content code {
      border-radius: 12px;
      background: #f1f5f9;
    }

    .article-content pre {
      padding: 18px;
      overflow: auto;
      border: 1px solid var(--border);
    }

    .not-found-box {
      padding: 46px 26px;
      text-align: center;
      border: 1px dashed rgba(37, 99, 235, .32);
      border-radius: var(--radius-lg);
      background: linear-gradient(180deg, #fff, var(--primary-pale));
    }

    .not-found-box h2 {
      margin: 0 0 10px;
      color: var(--heading);
      font-size: 28px;
      font-weight: 800;
    }

    .not-found-box p {
      margin: 0 auto 22px;
      max-width: 520px;
      color: var(--muted);
    }

    .article-sidebar {
      position: sticky;
      top: 148px;
      display: grid;
      gap: 18px;
    }

    .side-card {
      padding: 22px;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-lg);
      background: #fff;
      box-shadow: var(--shadow-sm);
    }

    .side-card h3 {
      margin: 0 0 14px;
      color: var(--heading);
      font-size: 18px;
      font-weight: 800;
    }

    .side-desc {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.75;
    }

    .side-list {
      display: grid;
      gap: 12px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .side-list a {
      display: flex;
      gap: 10px;
      padding: 12px;
      border: 1px solid var(--border);
      border-radius: 14px;
      background: var(--bg);
    }

    .side-list a:hover {
      border-color: rgba(37, 99, 235, .24);
      background: var(--primary-pale);
      transform: translateY(-2px);
    }

    .side-index {
      width: 26px;
      height: 26px;
      flex: 0 0 26px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 12px;
      font-weight: 900;
      border-radius: 9px;
      background: var(--primary-soft);
    }

    .side-list strong {
      display: block;
      color: var(--heading);
      font-size: 14px;
      line-height: 1.45;
    }

    .side-list span {
      display: block;
      margin-top: 3px;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.45;
    }

    .progress-panel {
      padding: 18px;
      border-radius: 18px;
      background: linear-gradient(135deg, var(--primary), #38bdf8);
      color: #fff;
      box-shadow: var(--shadow-lg);
    }

    .progress-panel p {
      margin: 0;
      color: rgba(255, 255, 255, .90);
      font-size: 14px;
      line-height: 1.7;
    }

    .progress-panel strong {
      display: block;
      margin-bottom: 8px;
      font-size: 18px;
      line-height: 1.35;
    }

    .recommend-section {
      margin-top: 34px;
      padding-top: 32px;
      border-top: 1px solid var(--border);
    }

    .section-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 10px;
      color: var(--primary);
      font-size: 13px;
      font-weight: 900;
      letter-spacing: .06em;
    }

    .section-title {
      margin: 0;
      color: var(--heading);
      font-size: clamp(24px, 3vw, 32px);
      line-height: 1.28;
      font-weight: 850;
      letter-spacing: -.025em;
    }

    .recommend-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 16px;
      margin-top: 20px;
    }

    .recommend-card {
      min-height: 100%;
      padding: 20px;
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-lg);
      background: #fff;
      box-shadow: var(--shadow-sm);
      transition: var(--ease);
    }

    .recommend-card:hover {
      border-color: rgba(37, 99, 235, .24);
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .recommend-card .tag {
      display: inline-flex;
      margin-bottom: 12px;
      padding: 6px 10px;
      color: var(--primary);
      font-size: 12px;
      font-weight: 800;
      border-radius: 999px;
      background: var(--primary-soft);
    }

    .recommend-card h3 {
      margin: 0 0 8px;
      color: var(--heading);
      font-size: 17px;
      line-height: 1.45;
      font-weight: 800;
    }

    .recommend-card p {
      margin: 0 0 14px;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .read-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary);
      font-size: 14px;
      font-weight: 800;
    }

    .read-link:hover {
      gap: 10px;
      color: var(--primary-dark);
    }

    .article-cta {
      margin-top: 34px;
      padding: 30px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      align-items: center;
      gap: 24px;
      border: 1px solid rgba(37, 99, 235, .14);
      border-radius: var(--radius-xl);
      background:
        radial-gradient(circle at 96% 0%, rgba(37, 99, 235, .12), transparent 34%),
        linear-gradient(135deg, #ffffff, var(--primary-pale));
      box-shadow: var(--shadow-md);
    }

    .article-cta h2 {
      margin: 0 0 8px;
      color: var(--heading);
      font-size: 25px;
      line-height: 1.35;
      font-weight: 850;
      letter-spacing: -.02em;
    }

    .article-cta p {
      margin: 0;
      color: var(--muted);
      max-width: 650px;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: flex-end;
    }

    .faq-mini {
      margin-top: 34px;
      padding-top: 32px;
      border-top: 1px solid var(--border);
    }

    .accordion-custom {
      margin-top: 18px;
      display: grid;
      gap: 12px;
    }

    .accordion-custom .accordion-item {
      overflow: hidden;
      border: 1px solid var(--border-soft);
      border-radius: 18px;
      background: #fff;
      box-shadow: var(--shadow-sm);
    }

    .accordion-custom .accordion-button {
      padding: 18px 20px;
      color: var(--heading);
      font-weight: 800;
      background: #fff;
      box-shadow: none;
    }

    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--primary);
      background: var(--primary-pale);
      box-shadow: none;
    }

    .accordion-custom .accordion-button:focus {
      border-color: transparent;
      box-shadow: 0 0 0 .25rem rgba(37, 99, 235, .13);
    }

    .accordion-custom .accordion-body {
      padding: 0 20px 20px;
      color: var(--muted);
      line-height: 1.8;
      background: #fff;
    }

    .site-footer {
      color: #cbd5e1;
      background:
        radial-gradient(circle at 12% 0%, rgba(37, 99, 235, .18), transparent 34%),
        var(--footer);
    }

    .footer-inner {
      padding: 64px 0 28px;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 18px;
    }

    .footer-title {
      margin: 0;
      color: #fff;
      font-size: 20px;
      font-weight: 850;
      line-height: 1.25;
      letter-spacing: -.02em;
    }

    .footer-desc {
      max-width: 460px;
      margin: 0 0 18px;
      color: #cbd5e1;
      line-height: 1.8;
    }

    .footer-note {
      color: #94a3b8;
      font-size: 14px;
      line-height: 1.75;
    }

    .footer-col h4 {
      margin: 4px 0 16px;
      color: #fff;
      font-size: 15px;
      font-weight: 850;
    }

    .footer-links {
      display: grid;
      gap: 10px;
    }

    .footer-links a {
      color: #cbd5e1;
      font-size: 14px;
    }

    .footer-links a:hover {
      color: #fff;
      transform: translateX(3px);
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-top: 46px;
      padding-top: 22px;
      color: #94a3b8;
      font-size: 14px;
      border-top: 1px solid rgba(226, 232, 240, .12);
    }

    @media (max-width: 1199.98px) {
      .search-pill {
        width: 220px;
      }

      .article-layout {
        grid-template-columns: minmax(0, 1fr) 280px;
        gap: 24px;
      }

      .recommend-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 991.98px) {
      .brand-row {
        min-height: 64px;
      }

      .brand-name {
        font-size: 18px;
      }

      .brand-slogan,
      .search-pill,
      .header-actions .btn-brand {
        display: none;
      }

      .channel-wrap {
        display: block;
      }

      .article-hero {
        padding: 36px 0 28px;
      }

      .article-head-card {
        padding: 26px;
        border-radius: 24px;
      }

      .article-layout {
        display: block;
      }

      .article-sidebar {
        position: static;
        margin-top: 24px;
      }

      .reading-card {
        padding: 28px;
      }

      .article-cta {
        grid-template-columns: 1fr;
      }

      .cta-actions {
        justify-content: flex-start;
      }
    }

    @media (max-width: 767.98px) {
      :root {
        --section: 54px;
      }

      body {
        font-size: 15px;
      }

      .container-xl {
        padding-left: 18px;
        padding-right: 18px;
      }

      .brand-icon,
      .footer-brand .brand-icon {
        width: 38px;
        height: 38px;
        flex-basis: 38px;
        border-radius: 13px;
      }

      .brand-name {
        max-width: 220px;
        overflow: hidden;
        text-overflow: ellipsis;
      }

      .mobile-channel {
        padding-bottom: 12px;
      }

      .channel-link {
        min-height: 34px;
        padding: 8px 12px;
        font-size: 13px;
      }

      .article-head-card {
        padding: 22px;
      }

      .article-title {
        letter-spacing: -.025em;
      }

      .article-summary,
      .article-content {
        font-size: 16px;
      }

      .article-main {
        padding: 34px 0 60px;
      }

      .reading-card {
        padding: 22px;
        border-radius: 22px;
      }

      .article-content h2 {
        font-size: 23px;
      }

      .article-content h3 {
        font-size: 20px;
      }

      .article-content table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
      }

      .article-cta {
        padding: 24px;
      }

      .cta-actions .btn-brand,
      .cta-actions .btn-soft,
      .not-found-box .btn-brand {
        width: 100%;
      }

      .footer-inner {
        padding: 48px 0 24px;
      }

      .footer-bottom {
        align-items: flex-start;
        flex-direction: column;
      }
    }

    @media (max-width: 520px) {
      .brand-name {
        max-width: 180px;
        font-size: 16px;
      }

      .article-kicker {
        gap: 8px;
      }

      .badge-custom {
        font-size: 12px;
      }

      .article-meta {
        display: grid;
        gap: 10px;
      }

      .reading-card {
        padding: 18px;
      }

      .recommend-card,
      .side-card {
        padding: 18px;
      }
    }