:root{
      --bg0:#f7f7fb;
      --bg1:#ffffff;
      --card:#ffffff;
      --text:#111827;
      --muted:#5b6476;
      --muted2:#6b7280;
      --line:rgba(17,24,39,.10);
      --line2:rgba(17,24,39,.14);
      --shadow: 0 18px 50px rgba(17,24,39,.10);
      --shadow2: 0 10px 28px rgba(17,24,39,.10);
      --radius:18px;
      --radius2:14px;

      --c1:#6d28d9;
      --c2:#2563eb;
      --c3:#10b981;
      --c4:#f59e0b;
      --c5:#ec4899;
      --ring: rgba(37,99,235,.20);

      --glow1: rgba(109,40,217,.20);
      --glow2: rgba(37,99,235,.18);
      --glow3: rgba(236,72,153,.16);
      --glow4: rgba(16,185,129,.14);

      --focus: 0 0 0 4px rgba(37,99,235,.22);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "PingFang SC","Hiragino Sans GB","Microsoft YaHei", "Noto Sans SC", "Noto Sans", sans-serif;
      color:var(--text);
      background:
        radial-gradient(1200px 650px at 10% -10%, rgba(109,40,217,.18), transparent 55%),
        radial-gradient(900px 500px at 95% 10%, rgba(37,99,235,.16), transparent 55%),
        radial-gradient(700px 450px at 10% 35%, rgba(236,72,153,.12), transparent 55%),
        linear-gradient(180deg, #f7f7fb 0%, #ffffff 55%, #f8fafc 100%);
    }
    a{color:inherit; text-decoration:none}
    .container{
      width:min(1180px, calc(100% - 40px));
      margin:0 auto;
    }
    .skip-link{
      position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden;
    }
    .skip-link:focus{
      left:16px; top:16px; width:auto; height:auto; padding:10px 12px; background:#fff; border:1px solid var(--line2); border-radius:12px; z-index:9999;
      box-shadow: var(--shadow2);
      outline:none;
    }

    header{
      position:sticky; top:0; z-index:50;
      backdrop-filter: blur(10px);
      background: rgba(247,247,251,.68);
      border-bottom: 1px solid rgba(17,24,39,.08);
    }
    .nav-wrap{
      display:flex; align-items:center; justify-content:space-between;
      padding:14px 0;
      gap:14px;
    }
    .brand{
      display:flex; align-items:center; gap:12px; min-width: 210px;
    }
    .ai-page-logo{
      width:44px; height:44px; border-radius:14px;
      background: radial-gradient(circle at 20% 20%, rgba(255,255,255,.8), rgba(255,255,255,.0) 45%),
                  linear-gradient(135deg, rgba(109,40,217,.95), rgba(37,99,235,.95));
      box-shadow: 0 10px 26px rgba(37,99,235,.22), 0 10px 26px rgba(109,40,217,.18);
      object-fit:contain;
      border: 1px solid rgba(17,24,39,.08);
      padding:6px;
    }
    .brand-text{display:flex; flex-direction:column; line-height:1.05}
    .brand-text strong{font-size:14px; letter-spacing:.2px}
    .brand-text span{font-size:12px; color:var(--muted)}
    .nav{
      display:flex; align-items:center; gap:6px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .nav a.nav-link{
      font-size:13px;
      color:var(--muted);
      padding:10px 10px;
      border-radius:12px;
      border:1px solid transparent;
      transition: transform .15s ease, background .15s ease, border-color .15s ease, color .15s ease;
      user-select:none;
      white-space:nowrap;
    }
    .nav a.nav-link:hover{
      color:var(--text);
      background: rgba(255,255,255,.65);
      border-color: rgba(17,24,39,.10);
      transform: translateY(-1px);
    }
    .nav-cta{
      display:flex; align-items:center; gap:10px;
      margin-left:6px;
    }
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:10px;
      padding:11px 14px;
      border-radius:14px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.72);
      color:var(--text);
      font-weight:650;
      font-size:13px;
      box-shadow: 0 8px 22px rgba(17,24,39,.08);
      transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease, background .15s ease;
      user-select:none;
      cursor:pointer;
    }
    .btn:hover{
      transform: translateY(-1px);
      box-shadow: 0 14px 36px rgba(17,24,39,.12);
      border-color: rgba(17,24,39,.16);
      background: rgba(255,255,255,.86);
    }
    .btn:active{transform: translateY(0px)}
    .btn:focus{outline:none; box-shadow: var(--shadow2), var(--focus)}
    .btn-primary{
      border: 1px solid rgba(255,255,255,.22);
      background: linear-gradient(135deg, rgba(109,40,217,.98), rgba(37,99,235,.98));
      color:#fff;
      box-shadow: 0 18px 50px rgba(37,99,235,.18), 0 18px 50px rgba(109,40,217,.14);
    }
    .btn-primary:hover{
      box-shadow: 0 22px 66px rgba(37,99,235,.24), 0 22px 66px rgba(109,40,217,.18);
      background: linear-gradient(135deg, rgba(109,40,217,1), rgba(37,99,235,1));
    }
    .btn-ghost{
      background: rgba(255,255,255,.0);
      border-color: rgba(17,24,39,.16);
      box-shadow:none;
    }
    .kbd{
      font-size:11px; padding:4px 8px; border-radius:10px;
      border:1px solid rgba(255,255,255,.22);
      background: rgba(255,255,255,.18);
      color: rgba(255,255,255,.92);
    }

    .mobile-toggle{
      display:none;
      border-radius:14px;
      padding:10px 12px;
      border:1px solid rgba(17,24,39,.12);
      background: rgba(255,255,255,.72);
      cursor:pointer;
      transition: transform .15s ease, background .15s ease;
    }
    .mobile-toggle:hover{transform: translateY(-1px); background: rgba(255,255,255,.9)}
    .mobile-toggle:focus{outline:none; box-shadow: var(--focus)}
    .hamburger{
      width:20px; height:14px; position:relative;
    }
    .hamburger span{
      position:absolute; left:0; right:0; height:2px; background: rgba(17,24,39,.84);
      border-radius:99px;
      transition: transform .18s ease, top .18s ease, opacity .18s ease;
    }
    .hamburger span:nth-child(1){top:0}
    .hamburger span:nth-child(2){top:6px}
    .hamburger span:nth-child(3){top:12px}
    .mobile-toggle[aria-expanded="true"] .hamburger span:nth-child(1){top:6px; transform: rotate(45deg)}
    .mobile-toggle[aria-expanded="true"] .hamburger span:nth-child(2){opacity:0}
    .mobile-toggle[aria-expanded="true"] .hamburger span:nth-child(3){top:6px; transform: rotate(-45deg)}

    .mobile-panel{
      display:none;
      padding: 8px 0 14px;
    }
    .mobile-panel-inner{
      background: rgba(255,255,255,.76);
      border:1px solid rgba(17,24,39,.10);
      border-radius:18px;
      padding: 12px;
      box-shadow: 0 18px 50px rgba(17,24,39,.10);
    }
    .mobile-links{
      display:flex; flex-direction:column; gap:6px;
    }
    .mobile-links a{
      padding: 12px 12px;
      border-radius:14px;
      border:1px solid transparent;
      color: var(--muted);
      font-weight:600;
      font-size:14px;
      background: rgba(255,255,255,.55);
      transition: border-color .15s ease, transform .15s ease, background .15s ease, color .15s ease;
    }
    .mobile-links a:hover{
      color:var(--text);
      background:#fff;
      border-color: rgba(17,24,39,.12);
      transform: translateY(-1px);
    }

    .hero{
      padding: 34px 0 14px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns: 1.08fr .92fr;
      gap:18px;
      align-items:stretch;
    }
    .hero-card{
      border:1px solid rgba(17,24,39,.10);
      background:
        radial-gradient(900px 340px at 10% 0%, rgba(109,40,217,.20), transparent 55%),
        radial-gradient(760px 320px at 95% 10%, rgba(37,99,235,.20), transparent 55%),
        radial-gradient(520px 260px at 15% 95%, rgba(16,185,129,.14), transparent 60%),
        linear-gradient(180deg, rgba(255,255,255,.78), rgba(255,255,255,.62));
      border-radius: var(--radius);
      box-shadow: 0 24px 70px rgba(17,24,39,.10);
      padding: 22px;
      position:relative;
      overflow:hidden;
    }
    .hero-card::after{
      content:"";
      position:absolute; inset:-2px;
      background:
        conic-gradient(from 210deg, rgba(109,40,217,.0), rgba(109,40,217,.22), rgba(37,99,235,.22), rgba(236,72,153,.20), rgba(16,185,129,.18), rgba(109,40,217,.0));
      opacity:.55;
      filter: blur(22px);
      pointer-events:none;
      transform: translate3d(0,0,0);
    }
    .hero-inner{position:relative; z-index:1}
    .eyebrow{
      display:flex; gap:10px; align-items:center; flex-wrap:wrap;
      margin-bottom: 10px;
    }
    .pill{
      display:inline-flex; align-items:center; gap:8px;
      padding: 7px 10px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.25);
      background: rgba(255,255,255,.22);
      color: rgba(17,24,39,.88);
      font-weight:650;
      font-size:12px;
      backdrop-filter: blur(8px);
    }
    .pill .dot{
      width:9px; height:9px; border-radius:50%;
      background: linear-gradient(135deg, var(--c1), var(--c2));
      box-shadow: 0 0 0 4px rgba(37,99,235,.12);
    }
    .hero-title{
      margin:0;
      font-size: 40px;
      letter-spacing: -0.8px;
      line-height: 1.05;
    }
    .grad-text{
      background: linear-gradient(135deg, rgba(109,40,217,1), rgba(37,99,235,1) 55%, rgba(236,72,153,1));
      -webkit-background-clip:text;
      background-clip:text;
      color: transparent;
      filter: drop-shadow(0 10px 22px rgba(37,99,235,.12));
    }
    .hero-sub{
      margin: 12px 0 18px;
      color: var(--muted);
      font-size: 15px;
      line-height:1.7;
      max-width: 56ch;
    }
    .hero-actions{
      display:flex; gap:12px; align-items:center; flex-wrap:wrap;
      margin-top: 10px;
    }
    .hero-meta{
      display:flex; gap:14px; flex-wrap:wrap;
      margin-top: 18px;
      align-items:center;
    }
    .meta-item{
      display:flex; align-items:flex-start; gap:10px;
      padding: 10px 12px;
      border-radius: 16px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.56);
      backdrop-filter: blur(8px);
      min-width: 220px;
    }
    .icon{
      width:34px; height:34px; border-radius:14px;
      background: radial-gradient(circle at 25% 20%, rgba(255,255,255,.95), rgba(255,255,255,.0) 55%),
                  linear-gradient(135deg, rgba(109,40,217,.95), rgba(37,99,235,.95));
      box-shadow: 0 14px 30px rgba(37,99,235,.18);
      display:flex; align-items:center; justify-content:center;
      flex:0 0 auto;
      border:1px solid rgba(255,255,255,.28);
    }
    .meta-item strong{font-size:13px}
    .meta-item span{display:block; margin-top:2px; color:var(--muted); font-size:12px; line-height:1.4}

    .hero-side{
      border:1px solid rgba(17,24,39,.10);
      background: linear-gradient(180deg, rgba(255,255,255,.74), rgba(255,255,255,.58));
      border-radius: var(--radius);
      box-shadow: 0 20px 60px rgba(17,24,39,.08);
      padding: 18px;
      position:relative;
      overflow:hidden;
    }
    .hero-side::before{
      content:"";
      position:absolute; left:-60px; top:-80px; width:220px; height:220px;
      background: radial-gradient(circle, rgba(16,185,129,.35), rgba(16,185,129,.0) 62%);
      filter: blur(2px);
      pointer-events:none;
    }
    .hero-side::after{
      content:"";
      position:absolute; right:-80px; bottom:-120px; width:280px; height:280px;
      background: radial-gradient(circle, rgba(236,72,153,.28), rgba(236,72,153,.0) 62%);
      filter: blur(2px);
      pointer-events:none;
    }
    .side-inner{position:relative; z-index:1}
    .side-title{
      margin:0 0 10px;
      font-size:16px;
      letter-spacing:-.2px;
      display:flex; align-items:center; justify-content:space-between; gap:10px;
    }
    .side-title .badge{
      font-size:12px;
      padding: 7px 10px;
      border-radius:999px;
      border:1px solid rgba(17,24,39,.12);
      background: rgba(255,255,255,.62);
      color: rgba(17,24,39,.86);
      font-weight:700;
      white-space:nowrap;
    }
    .metric-grid{
      display:grid;
      grid-template-columns: repeat(2, minmax(0,1fr));
      gap:12px;
      margin-top: 12px;
    }
    .metric{
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.62);
      border-radius: 16px;
      padding: 14px 12px;
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
      box-shadow: 0 12px 24px rgba(17,24,39,.06);
      min-height: 92px;
      display:flex; flex-direction:column; justify-content:space-between;
    }
    .metric:hover{
      transform: translateY(-3px);
      box-shadow: 0 18px 40px rgba(17,24,39,.10);
      border-color: rgba(17,24,39,.16);
    }
    .metric b{
      font-size: 20px;
      letter-spacing: -0.4px;
    }
    .metric span{
      font-size: 12px;
      color: var(--muted);
      line-height: 1.4;
    }
    .spark{
      height: 6px;
      border-radius:999px;
      background: linear-gradient(90deg, rgba(109,40,217,.95), rgba(37,99,235,.95), rgba(16,185,129,.9));
      opacity:.85;
    }

    .section{
      padding: 26px 0;
    }
    .section-head{
      display:flex; align-items:flex-end; justify-content:space-between; gap:14px; flex-wrap:wrap;
      margin-bottom: 14px;
    }
    .h2{
      margin:0;
      font-size: 22px;
      letter-spacing: -0.4px;
    }
    .lead{
      margin:0;
      color: var(--muted);
      line-height: 1.7;
      font-size: 14px;
      max-width: 70ch;
    }
    .grid-3{
      display:grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap:14px;
    }
    .grid-2{
      display:grid;
      grid-template-columns: repeat(2, minmax(0,1fr));
      gap:14px;
    }
    .card{
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.70);
      border-radius: var(--radius2);
      padding: 16px;
      box-shadow: 0 14px 38px rgba(17,24,39,.06);
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
      position:relative;
      overflow:hidden;
    }
    .card:hover{
      transform: translateY(-3px);
      border-color: rgba(17,24,39,.16);
      box-shadow: 0 20px 52px rgba(17,24,39,.10);
    }
    .card .topline{
      display:flex; align-items:center; justify-content:space-between; gap:12px;
      margin-bottom: 10px;
    }
    .chip{
      display:inline-flex; align-items:center; gap:8px;
      padding: 8px 10px;
      border-radius:999px;
      border:1px solid rgba(17,24,39,.12);
      background: rgba(255,255,255,.62);
      font-weight:750;
      font-size:12px;
      color: rgba(17,24,39,.86);
      white-space:nowrap;
    }
    .chip .mini{
      width:10px; height:10px; border-radius:3px;
      background: linear-gradient(135deg, rgba(109,40,217,1), rgba(37,99,235,1));
      box-shadow: 0 0 0 4px rgba(37,99,235,.12);
    }
    .card h3{
      margin:0;
      font-size: 15px;
      letter-spacing:-.2px;
    }
    .card p{
      margin:8px 0 0;
      color: var(--muted);
      line-height:1.7;
      font-size: 13px;
    }

    .timeline{
      display:grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap:12px;
    }
    .step{
      border-radius: 16px;
      border:1px solid rgba(17,24,39,.10);
      background: linear-gradient(180deg, rgba(255,255,255,.70), rgba(255,255,255,.55));
      padding: 14px;
      box-shadow: 0 14px 34px rgba(17,24,39,.06);
      position:relative;
      overflow:hidden;
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
      min-height: 150px;
      display:flex; flex-direction:column;
      gap:8px;
    }
    .step:hover{
      transform: translateY(-3px);
      box-shadow: 0 22px 56px rgba(17,24,39,.10);
      border-color: rgba(17,24,39,.16);
    }
    .step::after{
      content:"";
      position:absolute; inset:auto -40px -60px auto;
      width:140px; height:140px;
      background: radial-gradient(circle, rgba(37,99,235,.24), rgba(37,99,235,.0) 62%);
      filter: blur(2px);
      pointer-events:none;
    }
    .step .num{
      width:38px; height:38px;
      border-radius: 14px;
      border: 1px solid rgba(255,255,255,.22);
      background: linear-gradient(135deg, rgba(109,40,217,.95), rgba(37,99,235,.95));
      color:#fff;
      display:flex; align-items:center; justify-content:center;
      font-weight:900;
      box-shadow: 0 18px 40px rgba(37,99,235,.18);
      position:relative;
      z-index:1;
    }
    .step h3{
      margin:0;
      font-size: 15px;
      letter-spacing: -.2px;
      position:relative; z-index:1;
    }
    .step p{
      margin:0;
      color: var(--muted);
      font-size: 13px;
      line-height:1.7;
      position:relative; z-index:1;
    }

    .compare{
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.70);
      border-radius: var(--radius);
      overflow:hidden;
      box-shadow: 0 18px 50px rgba(17,24,39,.08);
    }
    .compare-head{
      padding: 16px 16px 12px;
      display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap;
      background:
        radial-gradient(900px 260px at 0% 0%, rgba(109,40,217,.18), transparent 55%),
        radial-gradient(760px 240px at 100% 0%, rgba(37,99,235,.16), transparent 55%),
        linear-gradient(180deg, rgba(255,255,255,.76), rgba(255,255,255,.62));
      border-bottom: 1px solid rgba(17,24,39,.08);
    }
    .rating-block{
      display:flex; align-items:center; gap:14px; flex-wrap:wrap;
    }
    .stars{
      display:flex; gap:4px; align-items:center;
    }
    .star{
      width:18px; height:18px;
      display:inline-block;
      background: conic-gradient(from 180deg, rgba(245,158,11,1), rgba(236,72,153,.6), rgba(245,158,11,1));
      clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
      filter: drop-shadow(0 8px 18px rgba(245,158,11,.18));
    }
    .rating-num{
      display:flex; flex-direction:column; line-height:1.1;
    }
    .rating-num b{
      font-size: 28px; letter-spacing:-.6px;
    }
    .rating-num span{color:var(--muted); font-size:12px; margin-top:4px}
    .compare-meta{
      display:flex; gap:10px; flex-wrap:wrap; align-items:center;
    }
    .tag{
      padding: 8px 10px;
      border-radius: 999px;
      border: 1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.62);
      color: rgba(17,24,39,.86);
      font-weight:750;
      font-size:12px;
      white-space:nowrap;
    }
    table{
      width:100%;
      border-collapse: collapse;
      font-size: 13px;
      table-layout: fixed;
    }
    th, td{
      padding: 12px 12px;
      border-bottom: 1px solid rgba(17,24,39,.08);
      vertical-align: top;
      color: var(--text);
    }
    th{
      background: rgba(248,250,252,.9);
      color: rgba(17,24,39,.88);
      font-size: 13px;
      text-align:left;
      font-weight:850;
    }
    td{color: rgba(17,24,39,.86)}
    .ok{
      display:inline-flex; align-items:center; gap:8px; color: rgba(17,24,39,.86); font-weight:750;
    }
    .ok i{
      width:18px; height:18px; border-radius:8px;
      background: linear-gradient(135deg, rgba(16,185,129,.95), rgba(37,99,235,.72));
      box-shadow: 0 14px 30px rgba(16,185,129,.18);
      position:relative; flex:0 0 auto;
    }
    .ok i::after{
      content:"";
      position:absolute; left:5px; top:4px;
      width:6px; height:10px;
      border-right:2px solid #fff; border-bottom:2px solid #fff;
      transform: rotate(38deg);
    }

    .no{
      color: var(--muted);
      font-weight:650;
    }

    .list-grid{
      display:grid;
      grid-template-columns: 1.1fr .9fr;
      gap:14px;
      align-items:start;
    }

    .form-card{
      border:1px solid rgba(17,24,39,.10);
      background:
        radial-gradient(700px 240px at 0% 0%, rgba(109,40,217,.14), transparent 55%),
        radial-gradient(700px 240px at 100% 0%, rgba(37,99,235,.12), transparent 55%),
        linear-gradient(180deg, rgba(255,255,255,.76), rgba(255,255,255,.60));
      border-radius: var(--radius);
      padding: 16px;
      box-shadow: 0 20px 60px rgba(17,24,39,.08);
    }
    .form-card h3{
      margin:0 0 6px;
      font-size:16px;
      letter-spacing:-.2px;
    }
    .form-card p{
      margin:0 0 14px;
      color: var(--muted);
      font-size:13px;
      line-height:1.7;
    }
    form{display:grid; gap:12px}
    .row-2{
      display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap:12px;
    }
    label{
      display:flex; flex-direction:column; gap:7px;
      font-size:12px; color: rgba(17,24,39,.88); font-weight:750;
    }
    input, select, textarea{
      width:100%;
      padding: 12px 12px;
      border-radius: 14px;
      border:1px solid rgba(17,24,39,.12);
      background: rgba(255,255,255,.75);
      color: var(--text);
      font-size:14px;
      outline:none;
      transition: box-shadow .15s ease, border-color .15s ease, background .15s ease;
    }
    textarea{min-height: 104px; resize: vertical}
    input:focus, select:focus, textarea:focus{
      box-shadow: var(--focus);
      border-color: rgba(37,99,235,.35);
      background:#fff;
    }
    .form-actions{
      display:flex; gap:12px; align-items:center; flex-wrap:wrap; margin-top:2px;
    }
    .small-note{
      color: var(--muted);
      font-size:12px;
      line-height:1.6;
    }
    .btn-submit{
      padding: 12px 16px;
      border-radius: 16px;
      border: 1px solid rgba(255,255,255,.22);
      background: linear-gradient(135deg, rgba(109,40,217,.98), rgba(37,99,235,.98));
      color:#fff;
      font-weight:900;
      cursor:pointer;
      box-shadow: 0 20px 52px rgba(37,99,235,.20), 0 20px 52px rgba(109,40,217,.16);
      transition: transform .15s ease, box-shadow .15s ease, filter .15s ease;
    }
    .btn-submit:hover{
      transform: translateY(-1px);
      box-shadow: 0 28px 80px rgba(37,99,235,.24), 0 28px 80px rgba(109,40,217,.20);
      filter: saturate(1.05);
    }
    .btn-submit:focus{outline:none; box-shadow: 0 28px 80px rgba(37,99,235,.24), 0 28px 80px rgba(109,40,217,.20), var(--focus)}
    .helper{
      border-left: 3px solid rgba(37,99,235,.35);
      padding-left: 12px;
      color: var(--muted);
      font-size: 12.5px;
      line-height:1.7;
      margin-top: 10px;
    }

    .faq{
      display:grid;
      grid-template-columns: 1fr;
      gap:10px;
    }
    details{
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.70);
      border-radius: 16px;
      padding: 10px 12px;
      box-shadow: 0 14px 38px rgba(17,24,39,.05);
      transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
    }
    details[open]{
      border-color: rgba(37,99,235,.22);
      box-shadow: 0 18px 50px rgba(17,24,39,.10);
      transform: translateY(-1px);
    }
    summary{
      cursor:pointer;
      list-style:none;
      display:flex; align-items:flex-start; justify-content:space-between; gap:12px;
      padding: 6px 4px;
      user-select:none;
    }
    summary::-webkit-details-marker{display:none}
    .q{
      font-weight:850;
      font-size:14px;
      line-height:1.45;
    }
    .chev{
      width:28px; height:28px; border-radius:12px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.62);
      display:flex; align-items:center; justify-content:center;
      flex:0 0 auto;
      transition: transform .18s ease, border-color .18s ease;
      margin-top: 2px;
    }
    details[open] .chev{transform: rotate(180deg); border-color: rgba(37,99,235,.22)}
    .a{
      padding: 0 4px 10px 4px;
      color: var(--muted);
      line-height:1.8;
      font-size:13px;
    }

    .comments-grid{
      display:grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap:14px;
    }
    .comment{
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.72);
      border-radius: var(--radius2);
      padding: 16px;
      box-shadow: 0 16px 46px rgba(17,24,39,.06);
      position:relative;
      overflow:hidden;
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
      min-height: 184px;
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .comment:hover{
      transform: translateY(-3px);
      box-shadow: 0 22px 64px rgba(17,24,39,.10);
      border-color: rgba(17,24,39,.16);
    }
    .comment::before{
      content:"";
      position:absolute; inset:-60px auto auto -60px;
      width:140px; height:140px;
      background: radial-gradient(circle, rgba(109,40,217,.16), rgba(109,40,217,.0) 60%);
      filter: blur(2px);
      pointer-events:none;
    }
    .comment-head{
      display:flex; align-items:flex-start; justify-content:space-between; gap:12px; position:relative; z-index:1;
    }
    .avatar{
      width:40px; height:40px;
      border-radius:16px;
      border:1px solid rgba(255,255,255,.25);
      background: linear-gradient(135deg, rgba(109,40,217,.95), rgba(37,99,235,.92));
      box-shadow: 0 18px 40px rgba(37,99,235,.18);
      display:flex; align-items:center; justify-content:center;
      color:#fff;
      font-weight:950;
      flex:0 0 auto;
    }
    .who{
      display:flex; flex-direction:column; gap:3px;
    }
    .who b{font-size:13px}
    .who span{font-size:12px; color: var(--muted)}
    .rating{
      font-weight:900;
      color: rgba(17,24,39,.86);
      font-size:12px;
      padding: 7px 10px;
      border-radius: 999px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.62);
      white-space:nowrap;
    }
    .comment p{
      margin:0;
      color: var(--muted);
      line-height:1.8;
      font-size:13px;
      position:relative; z-index:1;
    }

    .case-grid{
      display:grid;
      grid-template-columns: 1.1fr .9fr;
      gap:14px;
      align-items:stretch;
    }
    .case-left{
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.72);
      border-radius: var(--radius);
      box-shadow: 0 18px 50px rgba(17,24,39,.08);
      padding: 16px;
      overflow:hidden;
      position:relative;
    }
    .case-left::after{
      content:"";
      position:absolute; right:-140px; top:-180px; width:420px; height:420px;
      background: radial-gradient(circle, rgba(37,99,235,.20), rgba(37,99,235,.0) 60%);
      filter: blur(6px);
      pointer-events:none;
    }
    .case-left .inner{position:relative; z-index:1}
    .case-gallery{
      display:grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap:10px;
      margin-top: 12px;
    }
    .img-card{
      border-radius: 16px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.70);
      overflow:hidden;
      box-shadow: 0 14px 34px rgba(17,24,39,.06);
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
      position:relative;
      cursor:pointer;
    }
    .img-card:hover{
      transform: translateY(-3px);
      border-color: rgba(17,24,39,.16);
      box-shadow: 0 22px 56px rgba(17,24,39,.10);
    }
    .img-card figure{
      margin:0;
      padding:0;
    }
    .img-card img{
      width:100%;
      display:block;
      height:auto;
      object-fit: contain;
    }
    .img-card figcaption{
      padding: 10px 10px 12px;
      font-size: 12.5px;
      color: rgba(17,24,39,.86);
      font-weight:800;
      border-top: 1px solid rgba(17,24,39,.08);
      background: rgba(248,250,252,.88);
      line-height:1.3;
    }

    .case-right{
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.72);
      border-radius: var(--radius);
      box-shadow: 0 18px 50px rgba(17,24,39,.08);
      padding: 16px;
      display:flex;
      flex-direction:column;
      gap:12px;
    }
    .mini-list{
      display:grid;
      gap:10px;
    }
    .mini-item{
      display:flex; gap:10px; align-items:flex-start;
      padding: 12px 12px;
      border-radius: 16px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.65);
      transition: transform .18s ease, border-color .18s ease;
    }
    .mini-item:hover{transform: translateY(-2px); border-color: rgba(37,99,235,.22)}
    .mini-item .mark{
      width:28px; height:28px; border-radius:12px;
      background: linear-gradient(135deg, rgba(109,40,217,.95), rgba(37,99,235,.92));
      border:1px solid rgba(255,255,255,.22);
      box-shadow: 0 16px 34px rgba(37,99,235,.18);
      display:flex; align-items:center; justify-content:center;
      color:#fff;
      font-weight:950;
      flex:0 0 auto;
      margin-top: 2px;
      font-size: 12px;
    }
    .mini-item b{font-size:13px}
    .mini-item span{display:block; margin-top:3px; color:var(--muted); font-size:12.5px; line-height:1.6}

    .articles{
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.72);
      border-radius: var(--radius);
      box-shadow: 0 18px 50px rgba(17,24,39,.08);
      overflow:hidden;
    }
    .article-head{
      padding: 14px 16px;
      border-bottom: 1px solid rgba(17,24,39,.08);
      background: linear-gradient(180deg, rgba(248,250,252,.92), rgba(255,255,255,.65));
      display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap;
    }
    .article-head .hint{
      color: var(--muted);
      font-size: 13px;
      line-height:1.6;
    }
    .article-list{
      display:grid;
      grid-template-columns: 1fr;
      gap:0;
    }
    .article{
      padding: 14px 16px;
      display:flex; align-items:flex-start; justify-content:space-between; gap:12px;
      border-bottom: 1px solid rgba(17,24,39,.08);
    }
    .article:last-child{border-bottom:none}
    .article .title{
      font-weight:900;
      font-size: 14px;
      letter-spacing:-.2px;
      line-height:1.45;
      margin-bottom: 6px;
    }
    .article .desc{
      color: var(--muted);
      font-size: 13px;
      line-height:1.6;
      margin:0;
    }
    .article .link{
      flex:0 0 auto;
      padding: 10px 12px;
      border-radius: 14px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.65);
      font-weight:900;
      font-size: 12.5px;
      white-space:nowrap;
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
    }
    .article:hover .link{transform: translateY(-2px); border-color: rgba(37,99,235,.22); background:#fff}

    .tagcloud{
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.72);
      border-radius: var(--radius);
      box-shadow: 0 18px 50px rgba(17,24,39,.08);
      padding: 16px;
    }
    .cloud{
      display:flex; flex-wrap:wrap; gap:10px;
      margin-top: 10px;
    }
    .cloud a{
      padding: 9px 12px;
      border-radius: 999px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.65);
      color: rgba(17,24,39,.86);
      font-weight:800;
      font-size: 12.5px;
      transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
    }
    .cloud a:hover{
      transform: translateY(-2px);
      border-color: rgba(37,99,235,.22);
      box-shadow: 0 18px 40px rgba(37,99,235,.10);
    }

    .footer{
      margin-top: 10px;
      padding: 22px 0 30px;
      background: linear-gradient(180deg, rgba(255,255,255,.0), rgba(248,250,252,.9) 40%, rgba(248,250,252,1) 100%);
      border-top:1px solid rgba(17,24,39,.08);
    }
    .footer-wrap{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap:14px;
      align-items:start;
    }
    .foot-card{
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.80);
      border-radius: var(--radius);
      padding: 16px;
      box-shadow: 0 18px 50px rgba(17,24,39,.06);
    }
    .foot-top{
      display:flex; gap:14px; align-items:flex-start; justify-content:space-between; flex-wrap:wrap;
    }
    .foot-title{
      margin:0 0 6px;
      font-size: 15px;
      letter-spacing:-.2px;
    }
    .foot-desc{
      margin:0;
      color: var(--muted);
      font-size:13px;
      line-height:1.7;
      max-width: 60ch;
    }
    .foot-links{
      display:flex; gap:10px; flex-wrap:wrap; margin-top: 12px;
    }
    .foot-links a{
      padding: 8px 10px;
      border-radius: 12px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.65);
      font-weight:850;
      font-size: 12.5px;
      color: rgba(17,24,39,.86);
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
      white-space:nowrap;
    }
    .foot-links a:hover{transform: translateY(-2px); border-color: rgba(37,99,235,.22); background:#fff}
    .foot-contact{
      display:grid; gap:12px;
    }
    .kefu{
      display:flex; gap:12px; align-items:center;
      padding: 12px;
      border-radius: var(--radius2);
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.70);
    }
    .kefu img{
      width:70px; height:70px;
      border-radius:18px;
      border:1px solid rgba(17,24,39,.10);
      background:#fff;
      object-fit:cover;
    }
    .kefu b{font-size:13px}
    .kefu span{display:block; color:var(--muted); font-size:12.5px; margin-top:3px; line-height:1.6}
    .foot-bottom{
      margin-top: 14px;
      display:flex; gap:12px; align-items:center; justify-content:space-between; flex-wrap:wrap;
      color: var(--muted2);
      font-size: 12.5px;
    }
    .copyright{
      display:flex; gap:10px; align-items:center; flex-wrap:wrap;
    }
    .divider{
      width:1px; height:16px; background: rgba(17,24,39,.14);
      display:inline-block;
    }

    .float-kefu{
      position:fixed;
      right:14px;
      bottom:14px;
      z-index:80;
      display:flex; flex-direction:column; gap:10px;
      align-items:flex-end;
      pointer-events:none;
    }
    .float-kefu a{
      pointer-events:auto;
      display:flex; align-items:center; gap:10px;
      padding: 12px 12px;
      border-radius: 18px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.86);
      box-shadow: 0 22px 70px rgba(17,24,39,.14);
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
      font-weight:900;
      font-size:13px;
      color: rgba(17,24,39,.90);
      max-width: 260px;
    }
    .float-kefu a:hover{
      transform: translateY(-3px);
      border-color: rgba(37,99,235,.22);
      box-shadow: 0 28px 92px rgba(17,24,39,.18);
    }
    .float-icon{
      width:34px; height:34px; border-radius: 14px;
      background: linear-gradient(135deg, rgba(109,40,217,.98), rgba(37,99,235,.98));
      color:#fff;
      display:flex; align-items:center; justify-content:center;
      box-shadow: 0 18px 40px rgba(37,99,235,.18);
      border:1px solid rgba(255,255,255,.22);
      flex:0 0 auto;
    }

    .back-to-top{
      width:46px; height:46px;
      border-radius: 18px;
      border:1px solid rgba(17,24,39,.10);
      background: rgba(255,255,255,.86);
      box-shadow: 0 22px 70px rgba(17,24,39,.14);
      display:flex; align-items:center; justify-content:center;
      pointer-events:auto;
      cursor:pointer;
      transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
    }
    .back-to-top:hover{
      transform: translateY(-3px);
      border-color: rgba(37,99,235,.22);
      box-shadow: 0 28px 92px rgba(17,24,39,.18);
    }
    .back-to-top:focus{outline:none; box-shadow: var(--shadow2), var(--focus)}
    .back-to-top svg{opacity:.9}

    .reveal{
      opacity:0;
      transform: translateY(10px);
      transition: opacity .5s ease, transform .5s ease;
    }
    .reveal.in{
      opacity:1;
      transform: translateY(0);
    }

    @media (max-width: 980px){
      .hero-grid{grid-template-columns: 1fr}
      .hero-title{font-size: 34px}
      .metric-grid{grid-template-columns: repeat(2, minmax(0,1fr))}
      .grid-3{grid-template-columns: 1fr}
      .grid-2{grid-template-columns: 1fr}
      .timeline{grid-template-columns: 1fr 1fr}
      .list-grid{grid-template-columns: 1fr}
      .comments-grid{grid-template-columns: 1fr}
      .case-grid{grid-template-columns: 1fr}
      .case-gallery{grid-template-columns: repeat(2, minmax(0, 1fr))}
      .footer-wrap{grid-template-columns: 1fr}
      table{display:block}
      thead{display:none}
      tbody{display:block}
      tr{display:block; border-bottom:1px solid rgba(17,24,39,.08)}
      td{display:flex; gap:10px; justify-content:space-between; border-bottom:none; padding: 12px 12px}
      td::before{
        content: attr(data-label);
        font-weight:900;
        color: rgba(17,24,39,.88);
        min-width: 130px;
      }
    }
    @media (max-width: 820px){
      .nav{display:none}
      .nav-cta{display:none}
      .mobile-toggle{display:inline-flex}
      .mobile-panel{display:block}
      .container{width:min(1180px, calc(100% - 28px))}
      .row-2{grid-template-columns: 1fr}
      .hero-card{padding: 18px}
      .hero-sub{font-size:14px}
      .meta-item{min-width: 0}
    }
    @media (prefers-reduced-motion: reduce){
      html{scroll-behavior:auto}
      .reveal{transition:none}
      .card, .metric, .step, details, .btn, .img-card, .article .link, .mini-item, .comment, .cloud a{transition:none}
      .reveal{transform:none}
    }