:root{
      --bg0:#070A12;
      --bg1:#0B1230;
      --bg2:#0F2A59;
      --card:#0C1633cc;
      --card2:#0C1633f2;
      --text:#0f172a;
      --muted:#4b5563;
      --ink:#0b1324;
      --line:rgba(2,6,23,.10);
      --shadow: 0 18px 55px rgba(2,6,23,.14);
      --shadow2: 0 10px 28px rgba(2,6,23,.12);
      --radius:18px;
      --radius2:14px;

      --neon1:#7C3AED;
      --neon2:#22D3EE;
      --neon3:#60A5FA;
      --neon4:#A78BFA;
      --neon5:#34D399;

      --btn:#0b1224;
      --btnText:#eaf2ff;
      --btn2:#0ea5e9;
      --warn:#f97316;

      --container: 1120px;
      --pad: 18px;
      --focus: 0 0 0 4px rgba(34,211,238,.25), 0 0 0 1px rgba(34,211,238,.35);
    }

    *{box-sizing:border-box}
    body{
      margin:0;
      font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
      "PingFang SC","Hiragino Sans GB","Microsoft YaHei", Arial, sans-serif;
      color: #0b1224;
      background:
        radial-gradient(1200px 700px at 20% -10%, rgba(124,58,237,.18), transparent 55%),
        radial-gradient(900px 600px at 85% 0%, rgba(34,211,238,.18), transparent 55%),
        radial-gradient(750px 550px at 30% 40%, rgba(96,165,250,.12), transparent 58%),
        linear-gradient(180deg, #f7f8ff 0%, #ffffff 35%, #f8fafc 100%);
      overflow-x:hidden;
    }

    a{color:inherit; text-decoration:none}
    .container{
      width: min(var(--container), calc(100% - 2*var(--pad)));
      margin: 0 auto;
    }

    .skip-link{
      position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden;
    }
    .skip-link:focus{
      left: 16px; top: 12px; width:auto; height:auto; z-index:9999;
      background:#fff; padding:10px 12px; border-radius:10px; box-shadow: var(--shadow2);
      outline:none;
    }

    header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:saturate(160%) blur(10px);
      background: rgba(255,255,255,.72);
      border-bottom: 1px solid rgba(2,6,23,.08);
    }
    .nav-wrap{
      display:flex; align-items:center; justify-content:space-between;
      padding: 12px 0;
      gap: 14px;
    }

    .brand{
      display:flex; align-items:center; gap: 10px; min-width: 200px;
    }
    .ai-page-logo{
      width: 34px; height: 34px; object-fit:contain;
      filter: drop-shadow(0 10px 18px rgba(124,58,237,.25));
    }
    .brand .brand-text{display:flex; flex-direction:column; line-height:1.1}
    .brand .name{
      font-weight: 860; letter-spacing:.2px; font-size: 14px; color: #0b1224;
    }
    .brand .sub{
      font-size: 12px; color: rgba(11,18,36,.68);
    }

    nav{display:flex; align-items:center; gap: 10px; flex: 1; justify-content:center}
    .nav-links{
      display:flex; align-items:center; gap: 14px; flex-wrap:wrap;
    }
    .nav-links a{
      font-size: 13px; color: rgba(11,18,36,.78);
      padding: 8px 10px; border-radius: 999px;
      border: 1px solid transparent;
      transition: background .2s ease, border-color .2s ease, transform .2s ease;
      white-space:nowrap;
    }
    .nav-links a:hover{
      background: rgba(34,211,238,.08);
      border-color: rgba(34,211,238,.22);
      transform: translateY(-1px);
    }

    .nav-actions{
      display:flex; align-items:center; gap: 10px; min-width: 210px; justify-content:flex-end;
    }

    .btn{
      appearance:none; border:1px solid rgba(2,6,23,.12);
      background:#fff; color:#0b1224;
      padding: 10px 14px; border-radius: 12px;
      font-weight: 760; font-size: 13px;
      box-shadow: 0 10px 26px rgba(2,6,23,.06);
      cursor:pointer;
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease, background .18s ease;
      display:inline-flex; align-items:center; gap: 10px; justify-content:center;
      user-select:none;
    }
    .btn:hover{ transform: translateY(-1px); box-shadow: 0 18px 38px rgba(2,6,23,.10); border-color: rgba(34,211,238,.26) }
    .btn:active{ transform: translateY(0px); box-shadow: 0 12px 24px rgba(2,6,23,.08) }
    .btn:focus{ outline:none; box-shadow: var(--focus) }

    .btn-primary{
      background: linear-gradient(135deg, rgba(124,58,237,.12), rgba(34,211,238,.10)) , #0b1224;
      color: var(--btnText);
      border-color: rgba(34,211,238,.18);
      position:relative;
      overflow:hidden;
    }
    .btn-primary::before{
      content:"";
      position:absolute; inset:-2px;
      background: radial-gradient(600px 120px at 20% 20%, rgba(34,211,238,.35), transparent 50%),
                  radial-gradient(500px 140px at 80% 60%, rgba(124,58,237,.35), transparent 55%);
      opacity:.55;
      pointer-events:none;
    }
    .btn-primary span{ position:relative; z-index:1 }
    .btn-primary .dot{
      width: 9px; height: 9px; border-radius:50%;
      background: linear-gradient(135deg, var(--neon2), var(--neon1));
      box-shadow: 0 0 0 4px rgba(34,211,238,.18), 0 0 22px rgba(34,211,238,.35);
      flex:0 0 auto;
    }

    .icon-btn{
      width: 42px; height: 42px;
      border-radius: 12px;
      border: 1px solid rgba(2,6,23,.10);
      background:#fff;
      display:none;
      align-items:center;
      justify-content:center;
      cursor:pointer;
      transition: transform .18s ease, box-shadow .18s ease;
      box-shadow: 0 10px 26px rgba(2,6,23,.06);
    }
    .icon-btn:hover{ transform: translateY(-1px); box-shadow: 0 18px 38px rgba(2,6,23,.10) }
    .hamburger{
      width: 18px; height: 12px; position:relative;
    }
    .hamburger i{
      position:absolute; left:0; right:0; height:2px; border-radius:2px; background:#0b1224; transition: transform .2s ease, top .2s ease, opacity .2s ease;
    }
    .hamburger i:nth-child(1){ top:0 }
    .hamburger i:nth-child(2){ top:5px }
    .hamburger i:nth-child(3){ top:10px }
    .icon-btn[aria-expanded="true"] .hamburger i:nth-child(1){ top:5px; transform: rotate(45deg) }
    .icon-btn[aria-expanded="true"] .hamburger i:nth-child(2){ opacity:0 }
    .icon-btn[aria-expanded="true"] .hamburger i:nth-child(3){ top:5px; transform: rotate(-45deg) }

    .mobile-panel{
      display:none;
      padding: 0 0 12px;
    }
    .mobile-panel .panel-links{
      display:flex; flex-direction:column; gap:8px;
      padding-top: 10px;
    }
    .mobile-panel a{
      padding: 12px 12px;
      border-radius: 14px;
      border: 1px solid rgba(2,6,23,.08);
      background: rgba(255,255,255,.8);
      font-weight: 720;
      font-size: 14px;
    }
    .mobile-panel a:focus{ outline:none; box-shadow: var(--focus) }

    main{ padding-bottom: 30px; }

    .hero{
      padding: 34px 0 18px;
      position:relative;
    }
    .hero-grid{
      display:grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 18px;
      align-items:stretch;
    }

    .hero-card{
      border-radius: var(--radius);
      background:
        radial-gradient(700px 220px at 10% 0%, rgba(34,211,238,.20), transparent 60%),
        radial-gradient(650px 280px at 70% 20%, rgba(124,58,237,.20), transparent 62%),
        linear-gradient(180deg, rgba(255,255,255,.86), rgba(255,255,255,.70));
      border: 1px solid rgba(2,6,23,.10);
      box-shadow: 0 22px 65px rgba(2,6,23,.10);
      padding: 22px 20px;
      overflow:hidden;
      position:relative;
      min-height: 360px;
    }
    .hero-card::after{
      content:"";
      position:absolute; inset:-2px;
      background:
        conic-gradient(from 180deg at 50% 50%,
          rgba(34,211,238,.0) 0deg,
          rgba(34,211,238,.25) 50deg,
          rgba(124,58,237,.25) 140deg,
          rgba(96,165,250,.18) 220deg,
          rgba(34,211,238,.0) 330deg);
      opacity:.12;
      pointer-events:none;
    }

    .kicker{
      display:inline-flex; align-items:center; gap:10px;
      border: 1px solid rgba(34,211,238,.30);
      background: rgba(34,211,238,.10);
      color: rgba(11,18,36,.88);
      padding: 8px 10px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 800;
      letter-spacing:.2px;
      position:relative;
      z-index:1;
    }
    .kicker .badge{
      width: 10px; height: 10px; border-radius: 50%;
      background: linear-gradient(135deg, var(--neon2), var(--neon1));
      box-shadow: 0 0 0 4px rgba(34,211,238,.18);
    }

    .hero h1{
      position:relative;
      z-index:1;
      margin: 14px 0 10px;
      font-size: clamp(26px, 3.2vw, 38px);
      line-height: 1.12;
      letter-spacing: -0.6px;
      color:#0b1224;
    }
    .hero .lead{
      position:relative;
      z-index:1;
      margin: 0 0 16px;
      color: rgba(11,18,36,.74);
      font-size: 15px;
      line-height: 1.7;
      max-width: 62ch;
    }

    .hero-actions{
      position:relative;
      z-index:1;
      display:flex; gap: 12px; flex-wrap:wrap; align-items:center;
      margin-top: 14px;
    }

    .btn-ghost{
      background: rgba(255,255,255,.8);
      border-color: rgba(2,6,23,.12);
      box-shadow: 0 10px 26px rgba(2,6,23,.06);
    }

    .hero-mini{
      position:relative;
      z-index:1;
      margin-top: 16px;
      display:flex; gap: 12px; flex-wrap:wrap;
    }
    .pill{
      display:flex; align-items:center; gap: 10px;
      border-radius: 999px;
      padding: 10px 12px;
      background: rgba(255,255,255,.72);
      border: 1px solid rgba(2,6,23,.10);
    }
    .pill .ic{
      width: 28px; height: 28px; border-radius: 10px;
      background: linear-gradient(135deg, rgba(124,58,237,.14), rgba(34,211,238,.12));
      border: 1px solid rgba(34,211,238,.22);
      display:flex; align-items:center; justify-content:center;
      color:#0b1224;
      flex:0 0 auto;
      box-shadow: 0 10px 22px rgba(2,6,23,.06);
    }
    .pill b{
      font-size: 13px; letter-spacing:.1px;
    }
    .pill span{
      display:block; font-size: 12px; color: rgba(11,18,36,.62); margin-top:2px;
    }

    .side-stack{
      display:flex; flex-direction:column; gap: 14px;
    }
    .side-card{
      border-radius: var(--radius);
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.72);
      box-shadow: 0 18px 48px rgba(2,6,23,.08);
      padding: 18px 16px;
      position:relative;
      overflow:hidden;
      flex: 1;
      min-height: 170px;
    }
    .side-card::before{
      content:"";
      position:absolute; inset:-2px;
      background:
        radial-gradient(550px 160px at 30% 0%, rgba(124,58,237,.18), transparent 60%),
        radial-gradient(420px 160px at 90% 30%, rgba(34,211,238,.18), transparent 60%);
      opacity:.75;
      pointer-events:none;
    }
    .side-card > *{ position:relative; z-index:1; }

    .side-title{
      display:flex; align-items:center; justify-content:space-between; gap: 10px;
      margin-bottom: 10px;
    }
    .side-title h2{
      margin:0; font-size: 14px; letter-spacing:.2px;
      color: rgba(11,18,36,.86);
    }
    .chip{
      font-size: 12px;
      padding: 7px 10px;
      border-radius: 999px;
      background: rgba(124,58,237,.10);
      border: 1px solid rgba(124,58,237,.20);
      color: rgba(11,18,36,.78);
      font-weight: 760;
      white-space:nowrap;
    }

    .metric-grid{
      display:grid;
      grid-template-columns: repeat(2, minmax(0,1fr));
      gap: 10px;
      margin-top: 10px;
    }
    .metric{
      padding: 12px 12px;
      border-radius: 14px;
      border: 1px solid rgba(2,6,23,.08);
      background: rgba(255,255,255,.76);
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
    }
    .metric:hover{
      transform: translateY(-2px);
      box-shadow: 0 16px 38px rgba(2,6,23,.10);
      border-color: rgba(34,211,238,.24);
    }
    .metric .num{
      font-weight: 920; font-size: 18px; letter-spacing:-.4px;
      color:#0b1224;
    }
    .metric .lab{
      margin-top: 6px;
      font-size: 12px;
      color: rgba(11,18,36,.64);
      line-height:1.35;
    }

    .quick-row{
      display:flex; align-items:flex-start; justify-content:space-between; gap: 10px;
      margin-top: 12px;
    }
    .quick-row p{
      margin:0;
      font-size: 13px; color: rgba(11,18,36,.70); line-height: 1.6;
      max-width: 42ch;
    }

    .pulse{
      width: 44px; height: 44px; border-radius: 16px;
      border: 1px solid rgba(34,211,238,.22);
      background: rgba(34,211,238,.10);
      display:flex; align-items:center; justify-content:center;
      position:relative;
      flex:0 0 auto;
      box-shadow: 0 18px 45px rgba(34,211,238,.18);
    }
    .pulse::after{
      content:"";
      position:absolute; inset:-8px;
      border-radius: 20px;
      border: 1px solid rgba(34,211,238,.22);
      animation: ping 2.4s ease-in-out infinite;
      opacity:.35;
    }
    @keyframes ping{
      0%{ transform: scale(.9); opacity:.0 }
      20%{ opacity:.35 }
      60%{ opacity:.18 }
      100%{ transform: scale(1.15); opacity:0 }
    }

    section{ padding: 26px 0; }
    .section-head{
      display:flex; align-items:flex-end; justify-content:space-between; gap: 14px; flex-wrap:wrap;
      margin-bottom: 14px;
    }
    .section-head h2{
      margin:0;
      font-size: 22px;
      letter-spacing: -.35px;
    }
    .section-head p{
      margin:0; color: rgba(11,18,36,.70); font-size: 14px; line-height: 1.6;
      max-width: 58ch;
    }

    .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;
      align-items:stretch;
    }
    .grid-4{
      display:grid;
      grid-template-columns: repeat(4, minmax(0,1fr));
      gap: 12px;
    }

    .card{
      border-radius: var(--radius2);
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.78);
      box-shadow: 0 14px 40px rgba(2,6,23,.07);
      padding: 16px 14px;
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
      position:relative;
      overflow:hidden;
    }
    .card:hover{
      transform: translateY(-2px);
      box-shadow: 0 22px 55px rgba(2,6,23,.10);
      border-color: rgba(34,211,238,.24);
    }
    .card .tag{
      display:inline-flex; align-items:center; gap:8px;
      font-size: 12px; font-weight: 860;
      padding: 7px 10px; border-radius: 999px;
      border: 1px solid rgba(124,58,237,.18);
      background: rgba(124,58,237,.10);
      color: rgba(11,18,36,.82);
      margin-bottom: 10px;
    }
    .card h3{ margin: 0 0 8px; font-size: 15px; letter-spacing:-.15px }
    .card p{ margin:0; color: rgba(11,18,36,.70); font-size: 13px; line-height:1.65 }

    .list{
      margin:0; padding-left: 18px; color: rgba(11,18,36,.74); font-size: 13px; line-height: 1.75;
    }
    .list li{ margin: 6px 0 }

    .steps{
      display:grid;
      grid-template-columns: repeat(4, minmax(0,1fr));
      gap: 12px;
    }
    .step{
      padding: 16px 14px;
      border-radius: var(--radius2);
      border: 1px solid rgba(2,6,23,.10);
      background:
        linear-gradient(180deg, rgba(255,255,255,.82), rgba(255,255,255,.72));
      box-shadow: 0 14px 40px rgba(2,6,23,.06);
      position:relative;
      overflow:hidden;
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
    }
    .step:hover{ transform: translateY(-2px); box-shadow: 0 22px 55px rgba(2,6,23,.10); border-color: rgba(124,58,237,.22) }
    .step .n{
      width: 36px; height: 36px; border-radius: 14px;
      background: linear-gradient(135deg, rgba(124,58,237,.14), rgba(34,211,238,.12));
      border: 1px solid rgba(34,211,238,.24);
      display:flex; align-items:center; justify-content:center;
      font-weight: 950;
      margin-bottom: 10px;
      color:#0b1224;
    }
    .step h3{ margin:0 0 8px; font-size: 15px }
    .step p{ margin:0; color: rgba(11,18,36,.70); font-size: 13px; line-height:1.65 }

    .compare-wrap{
      border-radius: var(--radius);
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.78);
      box-shadow: 0 18px 55px rgba(2,6,23,.08);
      overflow:hidden;
    }
    .compare-head{
      padding: 16px 14px;
      display:flex; align-items:flex-start; justify-content:space-between; gap: 14px; flex-wrap:wrap;
      border-bottom: 1px solid rgba(2,6,23,.08);
      background:
        radial-gradient(700px 210px at 10% 0%, rgba(124,58,237,.18), transparent 55%),
        radial-gradient(520px 200px at 90% 50%, rgba(34,211,238,.18), transparent 60%),
        rgba(255,255,255,.78);
    }
    .rating{
      display:flex; align-items:center; gap: 12px; flex-wrap:wrap;
    }
    .stars{
      display:flex; gap: 6px; align-items:center;
    }
    .star{
      width: 20px; height: 20px;
      color: #0b1224;
      filter: drop-shadow(0 10px 18px rgba(124,58,237,.18));
    }
    .rating .big{
      font-weight: 980; font-size: 18px; letter-spacing:-.3px;
    }
    .rating .meta{
      font-size: 13px; color: rgba(11,18,36,.70); line-height:1.4;
    }

    .compare-table{
      width: 100%;
      border-collapse: collapse;
      font-size: 13px;
    }
    .compare-table th, .compare-table td{
      padding: 12px 12px;
      border-bottom: 1px solid rgba(2,6,23,.08);
      vertical-align: top;
      text-align:left;
    }
    .compare-table th{
      background: rgba(248,250,252,.85);
      font-weight: 900;
      color: rgba(11,18,36,.86);
    }
    .hl{
      display:inline-flex; align-items:center; gap: 8px;
      font-weight: 900;
      padding: 7px 10px; border-radius: 999px;
      border: 1px solid rgba(34,211,238,.24);
      background: rgba(34,211,238,.10);
      white-space:nowrap;
    }
    .hl i{
      width: 8px; height: 8px; border-radius:50%;
      background: linear-gradient(135deg, var(--neon2), var(--neon1));
      box-shadow: 0 0 0 4px rgba(34,211,238,.18);
    }

    .muted{ color: rgba(11,18,36,.70) }

    .hscroll{
      overflow:auto;
      -webkit-overflow-scrolling: touch;
    }
    .hscroll::-webkit-scrollbar{ height: 10px }
    .hscroll::-webkit-scrollbar-thumb{ background: rgba(2,6,23,.14); border-radius: 999px }
    .hscroll::-webkit-scrollbar-track{ background: rgba(2,6,23,.06) }

    .case-grid{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      align-items:start;
    }
    .case-item{
      border-radius: var(--radius2);
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.78);
      box-shadow: 0 14px 40px rgba(2,6,23,.06);
      padding: 14px 14px;
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
      overflow:hidden;
      position:relative;
    }
    .case-item:hover{ transform: translateY(-2px); box-shadow: 0 22px 55px rgba(2,6,23,.10); border-color: rgba(124,58,237,.22) }
    .case-top{
      display:flex; align-items:flex-start; justify-content:space-between; gap:12px;
      margin-bottom: 10px;
    }
    .case-title{
      margin:0;
      font-size: 15px;
      letter-spacing:-.15px;
      color:#0b1224;
    }
    .case-meta{
      display:flex; flex-direction:column; gap: 6px;
      align-items:flex-end;
    }
    .badge2{
      font-size: 12px; font-weight: 860;
      padding: 7px 10px; border-radius: 999px;
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.72);
      color: rgba(11,18,36,.76);
      white-space:nowrap;
    }
    .case-desc{
      margin:0;
      color: rgba(11,18,36,.70);
      font-size: 13px;
      line-height: 1.7;
    }
    .case-actions{
      margin-top: 12px;
      display:flex; gap: 10px; flex-wrap:wrap; align-items:center;
    }
    .mini-link{
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.76);
      padding: 10px 12px; border-radius: 12px;
      font-weight: 860; font-size: 13px;
      cursor:pointer;
      transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
      box-shadow: 0 10px 26px rgba(2,6,23,.06);
      display:inline-flex; align-items:center; gap: 10px;
    }
    .mini-link:hover{ transform: translateY(-1px); border-color: rgba(34,211,238,.24); box-shadow: 0 18px 38px rgba(2,6,23,.10) }
    .mini-link:focus{ outline:none; box-shadow: var(--focus) }

    .table-wrap{
      border: 1px solid rgba(2,6,23,.10);
      border-radius: var(--radius);
      background: rgba(255,255,255,.78);
      box-shadow: 0 18px 55px rgba(2,6,23,.07);
      overflow:hidden;
    }

    .form-card{
      border-radius: var(--radius);
      border: 1px solid rgba(2,6,23,.10);
      background:
        radial-gradient(650px 210px at 10% 0%, rgba(34,211,238,.18), transparent 55%),
        radial-gradient(520px 200px at 90% 50%, rgba(124,58,237,.18), transparent 60%),
        rgba(255,255,255,.78);
      box-shadow: 0 18px 55px rgba(2,6,23,.08);
      padding: 16px 14px;
      overflow:hidden;
      position:relative;
    }
    .form-grid{
      display:grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 14px;
      align-items:start;
    }
    form{ margin:0 }
    .field-grid{
      display:grid;
      grid-template-columns: repeat(2, minmax(0,1fr));
      gap: 10px;
    }
    .field{ display:flex; flex-direction:column; gap: 6px }
    label{
      font-size: 12px;
      color: rgba(11,18,36,.74);
      font-weight: 860;
      letter-spacing:.2px;
    }
    input, select, textarea{
      width:100%;
      padding: 12px 12px;
      border-radius: 12px;
      border: 1px solid rgba(2,6,23,.12);
      background: rgba(255,255,255,.88);
      color:#0b1224;
      font-size: 14px;
      outline:none;
      transition: box-shadow .18s ease, border-color .18s ease, transform .18s ease;
    }
    textarea{ resize: vertical; min-height: 110px; max-height: 260px }
    input:focus, select:focus, textarea:focus{
      border-color: rgba(34,211,238,.35);
      box-shadow: var(--focus);
    }
    .form-actions{
      display:flex; gap: 10px; flex-wrap:wrap; margin-top: 10px; align-items:center;
    }
    .small-note{
      font-size: 12px;
      color: rgba(11,18,36,.62);
      line-height:1.6;
      margin: 8px 0 0;
    }

    .side-help{
      border-radius: 16px;
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.76);
      padding: 14px 12px;
      box-shadow: 0 14px 40px rgba(2,6,23,.06);
      position:sticky; top: 92px;
    }
    .side-help h3{ margin:0 0 8px; font-size: 15px }
    .help-list{
      margin:0; padding-left: 18px;
      color: rgba(11,18,36,.72);
      font-size: 13px; line-height:1.75;
    }

    .faq{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      align-items:start;
    }
    .faq-item{
      border-radius: var(--radius2);
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.78);
      box-shadow: 0 14px 40px rgba(2,6,23,.06);
      overflow:hidden;
    }
    .faq-btn{
      width:100%;
      text-align:left;
      padding: 14px 12px;
      background: transparent;
      border:0;
      cursor:pointer;
      display:flex; align-items:flex-start; justify-content:space-between; gap: 12px;
      font-weight: 920;
      color:#0b1224;
    }
    .faq-btn:focus{ outline:none; box-shadow: var(--focus) }
    .faq-q{
      font-size: 14px;
      line-height:1.5;
      padding-right: 10px;
    }
    .chev{
      width: 28px; height: 28px; border-radius: 12px;
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.75);
      display:flex; align-items:center; justify-content:center;
      flex: 0 0 auto;
      transition: transform .2s ease;
      margin-top: 2px;
    }
    .faq-item[data-open="true"] .chev{ transform: rotate(180deg) }
    .faq-a{
      max-height: 0;
      overflow:hidden;
      transition: max-height .25s ease;
    }
    .faq-item[data-open="true"] .faq-a{
      max-height: 220px;
    }
    .faq-a p{
      margin:0;
      padding: 0 12px 14px;
      color: rgba(11,18,36,.72);
      font-size: 13px;
      line-height: 1.75;
    }

    .review-grid{
      display:grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap: 12px;
    }
    .review{
      padding: 14px 12px;
      border-radius: var(--radius2);
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.78);
      box-shadow: 0 14px 40px rgba(2,6,23,.06);
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
      position:relative;
      overflow:hidden;
    }
    .review:hover{ transform: translateY(-2px); box-shadow: 0 22px 55px rgba(2,6,23,.10); border-color: rgba(34,211,238,.24) }
    .review .who{
      display:flex; align-items:center; justify-content:space-between; gap: 12px;
      margin-bottom: 10px;
    }
    .avatar{
      width: 38px; height: 38px; border-radius: 16px;
      border: 1px solid rgba(34,211,238,.22);
      background: linear-gradient(135deg, rgba(34,211,238,.12), rgba(124,58,237,.12));
      display:flex; align-items:center; justify-content:center;
      font-weight: 950;
      color:#0b1224;
      box-shadow: 0 18px 45px rgba(34,211,238,.10);
      flex:0 0 auto;
    }
    .review .role{
      font-weight: 920; font-size: 13px;
    }
    .review .stars{
      gap: 4px;
    }
    .review p{
      margin:0;
      color: rgba(11,18,36,.72);
      font-size: 13px;
      line-height: 1.75;
    }

    .article-list{
      display:grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 12px;
    }
    .article{
      border-radius: var(--radius2);
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.78);
      box-shadow: 0 14px 40px rgba(2,6,23,.06);
      padding: 14px 12px;
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
      display:flex; flex-direction:column; gap: 10px;
    }
    .article:hover{ transform: translateY(-2px); box-shadow: 0 22px 55px rgba(2,6,23,.10); border-color: rgba(124,58,237,.22) }
    .article .top{
      display:flex; align-items:center; justify-content:space-between; gap:12px;
    }
    .article .type{
      font-weight: 930;
      font-size: 12px;
      color: rgba(11,18,36,.80);
      padding: 7px 10px;
      border-radius: 999px;
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.76);
      white-space:nowrap;
    }
    .article h3{
      margin: 0;
      font-size: 14px;
      letter-spacing:-.1px;
      line-height:1.4;
    }
    .article p{
      margin:0;
      color: rgba(11,18,36,.70);
      font-size: 13px;
      line-height:1.65;
      flex: 1;
    }
    .article a{
      display:inline-flex; align-items:center; justify-content:space-between; gap: 10px;
      font-weight: 900;
      font-size: 13px;
      padding: 10px 12px;
      border-radius: 12px;
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.76);
      transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
      box-shadow: 0 10px 26px rgba(2,6,23,.06);
    }
    .article a:hover{ transform: translateY(-1px); border-color: rgba(34,211,238,.24); box-shadow: 0 18px 38px rgba(2,6,23,.10) }

    .network{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      align-items:start;
    }

    .timeline{
      border-radius: var(--radius);
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.78);
      box-shadow: 0 18px 55px rgba(2,6,23,.07);
      padding: 14px 14px;
      overflow:hidden;
    }
    .timeline .row{
      display:flex; gap: 12px; align-items:flex-start;
      padding: 12px 0;
      border-bottom: 1px solid rgba(2,6,23,.08);
    }
    .timeline .row:last-child{ border-bottom:0 }
    .t-dot{
      width: 12px; height: 12px; border-radius:50%;
      background: linear-gradient(135deg, var(--neon2), var(--neon1));
      box-shadow: 0 0 0 4px rgba(34,211,238,.16), 0 0 22px rgba(34,211,238,.22);
      margin-top: 6px;
      flex:0 0 auto;
    }
    .timeline b{ display:block; font-size: 14px; margin-bottom: 4px }
    .timeline span{ color: rgba(11,18,36,.70); font-size: 13px; line-height:1.65; display:block }

    .price-grid{
      display:grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap: 12px;
    }
    .price{
      border-radius: var(--radius2);
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.78);
      box-shadow: 0 14px 40px rgba(2,6,23,.06);
      padding: 14px 12px;
      position:relative;
      overflow:hidden;
    }
    .price .k{
      display:flex; align-items:center; justify-content:space-between; gap: 10px;
      margin-bottom: 10px;
    }
    .price .k b{ font-size: 14px }
    .price .k .pill2{
      font-weight: 950;
      font-size: 12px;
      padding: 7px 10px;
      border-radius: 999px;
      border: 1px solid rgba(34,211,238,.22);
      background: rgba(34,211,238,.10);
      white-space:nowrap;
    }
    .price .val{
      font-weight: 980; font-size: 22px; letter-spacing:-.5px;
      margin-bottom: 6px;
    }
    .price p{
      margin:0;
      color: rgba(11,18,36,.70);
      font-size: 13px;
      line-height: 1.65;
    }

    .tagcloud{
      border-radius: var(--radius);
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.78);
      box-shadow: 0 18px 55px rgba(2,6,23,.07);
      padding: 14px 14px;
    }
    .cloud{
      display:flex; flex-wrap:wrap; gap: 10px;
    }
    .cloud a{
      padding: 9px 12px;
      border-radius: 999px;
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.76);
      font-weight: 860;
      font-size: 13px;
      color: rgba(11,18,36,.78);
      transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
      display:inline-flex; align-items:center; gap: 10px;
    }
    .cloud a:hover{
      transform: translateY(-1px);
      border-color: rgba(124,58,237,.22);
      box-shadow: 0 18px 38px rgba(2,6,23,.08);
    }
    .cloud i{
      width: 10px; height: 10px; border-radius:50%;
      background: linear-gradient(135deg, var(--neon2), var(--neon1));
      box-shadow: 0 0 0 4px rgba(124,58,237,.14);
      display:inline-block;
    }

    .footer{
      margin-top: 10px;
      border-top: 1px solid rgba(2,6,23,.10);
      background:
        radial-gradient(900px 320px at 10% 0%, rgba(124,58,237,.14), transparent 60%),
        radial-gradient(760px 280px at 90% 30%, rgba(34,211,238,.14), transparent 60%),
        #0b1224;
      color: #eaf2ff;
      padding: 22px 0 18px;
    }
    .footer .f-grid{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap: 14px;
      align-items:start;
    }
    .footer a{
      color: rgba(234,242,255,.92);
      border-bottom: 1px dashed rgba(234,242,255,.22);
      padding-bottom: 2px;
    }
    .footer a:hover{ border-bottom-color: rgba(234,242,255,.55) }
    .foot-brand{
      display:flex; gap: 12px; align-items:flex-start;
    }
    .footer .logo{
      width: 44px; height: 44px; border-radius: 18px;
      border: 1px solid rgba(34,211,238,.22);
      background: rgba(255,255,255,.06);
      display:flex; align-items:center; justify-content:center;
      box-shadow: 0 18px 45px rgba(34,211,238,.15);
      flex:0 0 auto;
    }
    .footer .logo img{ width: 28px; height: 28px; object-fit:contain; filter: brightness(1.1) }
    .footer h3{
      margin: 0 0 6px;
      font-size: 16px;
      letter-spacing:-.2px;
    }
    .footer p{
      margin:0;
      color: rgba(234,242,255,.80);
      font-size: 13px;
      line-height: 1.7;
      max-width: 62ch;
    }
    .footer .links{
      margin-top: 12px;
      display:flex; flex-wrap:wrap; gap: 10px;
      align-items:center;
    }
    .footer .links .btn-foot{
      border: 1px solid rgba(234,242,255,.18);
      background: rgba(255,255,255,.06);
      padding: 10px 12px;
      border-radius: 12px;
      font-weight: 900;
      font-size: 13px;
      display:inline-flex; align-items:center; gap: 10px;
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
      box-shadow: 0 16px 38px rgba(0,0,0,.18);
      cursor:pointer;
    }
    .footer .links .btn-foot:hover{ transform: translateY(-1px); border-color: rgba(34,211,238,.35); box-shadow: 0 22px 55px rgba(0,0,0,.24) }

    .footer .side{
      border: 1px solid rgba(234,242,255,.16);
      background: rgba(255,255,255,.04);
      border-radius: 16px;
      padding: 14px 12px;
    }
    .footer .side h4{ margin:0 0 8px; font-size: 14px }
    .kv{
      display:grid; grid-template-columns: 1fr; gap: 10px;
    }
    .kv .item{
      display:flex; align-items:flex-start; justify-content:space-between; gap: 12px;
      border-bottom: 1px solid rgba(234,242,255,.12);
      padding-bottom: 10px;
    }
    .kv .item:last-child{ border-bottom:0; padding-bottom:0 }
    .kv .k{ color: rgba(234,242,255,.78); font-size: 12px; font-weight: 860; letter-spacing:.2px }
    .kv .v{ color: rgba(234,242,255,.95); font-size: 13px; font-weight: 900; text-align:right }
    .wechat-row{
      display:flex; gap: 12px; align-items:center; margin-top: 12px;
    }
    .qrcode{
      width: 84px; height: 84px; border-radius: 18px;
      border: 1px solid rgba(234,242,255,.16);
      background: rgba(255,255,255,.04);
      padding: 6px;
      flex:0 0 auto;
    }
    .qrcode img{ width:100%; height:100%; object-fit:contain; border-radius: 12px }
    .fine{
      color: rgba(234,242,255,.70);
      font-size: 12px;
      line-height:1.6;
      margin-top: 10px;
    }
    .copyright{
      margin-top: 14px;
      padding-top: 12px;
      border-top: 1px solid rgba(234,242,255,.12);
      display:flex; align-items:center; justify-content:space-between; gap: 12px; flex-wrap:wrap;
      color: rgba(234,242,255,.72);
      font-size: 12px;
    }

    .backtop{
      position:fixed; right: 16px; bottom: 16px;
      z-index: 60;
      width: 46px; height: 46px;
      border-radius: 18px;
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.86);
      box-shadow: 0 18px 45px rgba(2,6,23,.12);
      display:flex; align-items:center; justify-content:center;
      cursor:pointer;
      transition: transform .18s ease, opacity .18s ease, background .18s ease;
      opacity: 0;
      pointer-events:none;
    }
    .backtop.show{
      opacity:1;
      pointer-events:auto;
    }
    .backtop:hover{ transform: translateY(-2px); background:#fff }
    .backtop:focus{ outline:none; box-shadow: var(--focus) }

    .float-kefu{
      position:fixed; right: 16px; bottom: 74px;
      z-index: 59;
      width: 56px; height: 56px;
      border-radius: 22px;
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.88);
      box-shadow: 0 18px 45px rgba(2,6,23,.12);
      display:flex; align-items:center; justify-content:center;
      cursor:pointer;
      transition: transform .18s ease, box-shadow .18s ease;
    }
    .float-kefu:hover{ transform: translateY(-2px); box-shadow: 0 22px 55px rgba(2,6,23,.16) }
    .float-kefu svg{ width: 24px; height: 24px; }
    .kefu-pop{
      position:fixed;
      right: 16px; bottom: 136px;
      z-index: 70;
      width: min(320px, calc(100% - 32px));
      border-radius: 18px;
      border: 1px solid rgba(2,6,23,.12);
      background: rgba(255,255,255,.92);
      box-shadow: 0 22px 65px rgba(2,6,23,.18);
      overflow:hidden;
      display:none;
    }
    .kefu-pop.show{ display:block }
    .kefu-pop .head{
      padding: 12px 12px;
      display:flex; align-items:center; justify-content:space-between; gap: 10px;
      border-bottom: 1px solid rgba(2,6,23,.08);
      background: linear-gradient(135deg, rgba(124,58,237,.10), rgba(34,211,238,.10));
    }
    .kefu-pop .head b{ font-size: 14px }
    .kefu-pop .close{
      border: 1px solid rgba(2,6,23,.12);
      background: rgba(255,255,255,.85);
      width: 34px; height: 34px;
      border-radius: 12px;
      cursor:pointer;
      display:flex; align-items:center; justify-content:center;
    }
    .kefu-pop .close:focus{ outline:none; box-shadow: var(--focus) }
    .kefu-pop .body{
      padding: 12px 12px;
      display:grid;
      grid-template-columns: 1fr auto;
      gap: 12px;
      align-items:center;
    }
    .kefu-pop .body p{
      margin:0;
      color: rgba(11,18,36,.70);
      font-size: 13px;
      line-height:1.6;
    }
    .kefu-pop .qr{
      width: 86px; height: 86px;
      border-radius: 18px;
      border: 1px solid rgba(2,6,23,.10);
      background: rgba(255,255,255,.86);
      padding: 6px;
    }
    .kefu-pop .qr img{ width:100%; height:100%; object-fit:contain; border-radius: 12px }

    .sr-only{
      position:absolute;
      width:1px; height:1px;
      padding:0; margin:-1px;
      overflow:hidden; clip: rect(0,0,0,0);
      white-space:nowrap; border:0;
    }

    @media (max-width: 980px){
      nav{ display:none }
      .icon-btn{ display:flex }
      .mobile-panel{ display:block }
      .hero-grid{ grid-template-columns: 1fr; }
      .hero-card{ min-height: auto }
      .side-stack{ flex-direction:row; flex-wrap:wrap }
      .side-card{ flex: 1 1 320px; min-height: 170px }
      .grid-3{ grid-template-columns: repeat(2, minmax(0,1fr)) }
      .grid-2{ grid-template-columns: 1fr }
      .steps{ grid-template-columns: repeat(2, minmax(0,1fr)) }
      .faq{ grid-template-columns: 1fr }
      .review-grid{ grid-template-columns: 1fr; }
      .article-list{ grid-template-columns: 1fr; }
      .form-grid{ grid-template-columns: 1fr }
      .side-help{ position:relative; top:auto }
      .case-grid{ grid-template-columns: 1fr }
      .network{ grid-template-columns: 1fr }
      .price-grid{ grid-template-columns: 1fr }
      .footer .f-grid{ grid-template-columns: 1fr }
    }

    @media (prefers-reduced-motion: reduce){
      *{ scroll-behavior: auto !important; animation: none !important; transition: none !important; }
    }

    html{ scroll-behavior:smooth; }