:root{
      --bg: #fbf6ef;
      --panel: rgba(255,255,255,.78);
      --panel2: rgba(255,255,255,.62);
      --text: #1f2328;
      --muted: #5b6470;
      --brand: #2b6fff;
      --brand2:#7a4cff;
      --line: rgba(31,35,40,.10);
      --shadow: 0 10px 30px rgba(31,35,40,.08);
      --shadow2: 0 8px 18px rgba(31,35,40,.08);
      --radius: 18px;
      --radius2: 14px;
      --ring: rgba(43,111,255,.25);
    }

    *{box-sizing:border-box}
    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 CJK SC", "Source Han Sans SC", sans-serif;
      color:var(--text);
      background:
        radial-gradient(1200px 800px at 10% -10%, rgba(43,111,255,.18), transparent 55%),
        radial-gradient(1000px 700px at 85% 0%, rgba(122,76,255,.14), transparent 55%),
        radial-gradient(700px 500px at 30% 70%, rgba(255,186,120,.18), transparent 60%),
        linear-gradient(180deg, #fffaf2 0%, var(--bg) 55%, #fff 100%);
      overflow-x:hidden;
    }

    a{color:inherit}
    .container{
      width:min(1100px, calc(100% - 32px));
      margin:0 auto;
    }

    .skip{
      position:absolute;
      left:-9999px; top:auto; width:1px; height:1px; overflow:hidden;
    }
    .skip:focus{
      left:16px; top:16px; width:auto; height:auto; z-index:9999;
      background:#fff; padding:10px 12px; border-radius:12px; box-shadow: var(--shadow2);
      outline:3px solid var(--ring);
    }

    header{
      position:sticky;
      top:0;
      z-index:50;
      backdrop-filter: blur(10px);
      background: rgba(251,246,239,.68);
      border-bottom:1px solid rgba(31,35,40,.08);
    }
    .navWrap{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      padding:12px 0;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:10px;
      min-width: 112px;
    }
    .logo{
      width:38px; height:38px; border-radius:14px;
      background:
        radial-gradient(18px 18px at 30% 30%, rgba(255,255,255,.95), rgba(255,255,255,.0) 60%),
        linear-gradient(135deg, rgba(43,111,255,.95), rgba(122,76,255,.88));
      box-shadow: 0 12px 22px rgba(43,111,255,.18);
      display:grid; place-items:center;
      font-weight:900;
      color:#fff;
      letter-spacing:.5px;
    }
    .brandText{
      display:flex; flex-direction:column; line-height:1.1;
    }
    .brandText strong{font-size:14px}
    .brandText span{font-size:12px; color:var(--muted)}
    nav{display:flex; align-items:center; gap:10px}
    .menu{
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .navLink{
      text-decoration:none;
      font-size:13px;
      color:#2a313a;
      padding:8px 10px;
      border-radius:12px;
      border:1px solid transparent;
      transition: transform .15s ease, background .15s ease, border-color .15s ease;
      white-space:nowrap;
    }
    .navLink:hover{
      background: rgba(255,255,255,.6);
      border-color: rgba(31,35,40,.10);
      transform: translateY(-1px);
    }
    .navCTA{
      display:flex; gap:10px; align-items:center;
    }
    .btn{
      appearance:none;
      border:1px solid rgba(31,35,40,.12);
      background: rgba(255,255,255,.65);
      color:#1f2328;
      border-radius:14px;
      padding:10px 12px;
      font-weight:700;
      font-size:13px;
      cursor:pointer;
      transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease, background .15s ease;
      box-shadow: 0 8px 18px rgba(31,35,40,.06);
      text-decoration:none;
      display:inline-flex;
      align-items:center;
      gap:8px;
      white-space:nowrap;
    }
    .btn:hover{transform: translateY(-1px); box-shadow: 0 14px 26px rgba(31,35,40,.10); border-color: rgba(31,35,40,.18)}
    .btn:focus{outline:3px solid var(--ring); outline-offset:2px}
    .btnPrimary{
      border-color: rgba(43,111,255,.35);
      background: linear-gradient(135deg, rgba(43,111,255,.16), rgba(122,76,255,.12));
    }
    .btnDot{
      width:10px; height:10px; border-radius:50%;
      background: linear-gradient(135deg, var(--brand), var(--brand2));
      box-shadow: 0 10px 18px rgba(43,111,255,.24);
    }

    .mobileToggle{
      display:none;
      width:42px; height:42px; border-radius:14px;
      border:1px solid rgba(31,35,40,.12);
      background: rgba(255,255,255,.65);
      box-shadow: 0 8px 18px rgba(31,35,40,.06);
      cursor:pointer;
      transition: transform .15s ease;
    }
    .mobileToggle:hover{transform: translateY(-1px)}
    .burger{
      width:18px; height:12px; position:relative; margin:0 auto;
    }
    .burger span{
      position:absolute; left:0; right:0; height:2px; border-radius:2px; background:#2a313a; opacity:.9;
      transition: transform .18s ease, top .18s ease, opacity .18s ease;
    }
    .burger span:nth-child(1){top:0}
    .burger span:nth-child(2){top:5px}
    .burger span:nth-child(3){top:10px}
    .mobileToggle[aria-expanded="true"] .burger span:nth-child(1){top:5px; transform: rotate(45deg)}
    .mobileToggle[aria-expanded="true"] .burger span:nth-child(2){opacity:0}
    .mobileToggle[aria-expanded="true"] .burger span:nth-child(3){top:5px; transform: rotate(-45deg)}

    .mobileMenu{
      display:none;
      padding: 0 0 14px 0;
    }
    .mobileMenu .menu{
      justify-content:flex-start;
      gap:8px;
    }
    .mobileMenu .navCTA{width:100%; justify-content:flex-start; margin-top:10px}
    .mobileMenu .navLink{padding:9px 11px}

    .hero{
      padding: 26px 0 10px 0;
    }
    .heroGrid{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap:18px;
      align-items:stretch;
    }
    .heroCard{
      border:1px solid rgba(31,35,40,.10);
      background: linear-gradient(180deg, rgba(255,255,255,.75), rgba(255,255,255,.55));
      box-shadow: var(--shadow);
      border-radius: var(--radius);
      padding: 22px;
      position:relative;
      overflow:hidden;
    }
    .heroCard:before{
      content:"";
      position:absolute;
      inset:-2px;
      background:
        radial-gradient(500px 280px at 20% 0%, rgba(43,111,255,.18), transparent 55%),
        radial-gradient(520px 260px at 70% 10%, rgba(122,76,255,.16), transparent 60%),
        radial-gradient(420px 260px at 40% 90%, rgba(255,186,120,.18), transparent 60%);
      pointer-events:none;
      filter:saturate(1.05);
      opacity:.9;
    }
    .heroInner{position:relative; z-index:1}

    .pillRow{display:flex; gap:10px; flex-wrap:wrap; margin-bottom:10px}
    .pill{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 10px;
      border-radius:999px;
      background: rgba(255,255,255,.62);
      border:1px solid rgba(31,35,40,.10);
      color:#2a313a;
      font-size:12px;
      box-shadow: 0 10px 22px rgba(31,35,40,.06);
      user-select:none;
      white-space:nowrap;
    }
    .pillIcon{
      width:18px; height:18px; border-radius:8px;
      background: linear-gradient(135deg, rgba(43,111,255,.18), rgba(122,76,255,.14));
      border:1px solid rgba(31,35,40,.10);
      display:grid; place-items:center;
      color:#2b6fff;
      font-weight:900;
      font-size:12px;
    }

    h1{
      margin: 8px 0 10px 0;
      font-size: clamp(22px, 3.2vw, 32px);
      letter-spacing: -0.4px;
      line-height:1.25;
    }
    .lede{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.7;
      max-width: 58ch;
    }

    .heroActions{
      display:flex;
      gap:12px;
      flex-wrap:wrap;
      margin-top:16px;
      align-items:center;
    }
    .miniNote{
      margin-left:auto;
      display:flex; flex-direction:column; gap:4px;
      padding:10px 12px;
      border-radius:14px;
      border:1px dashed rgba(31,35,40,.18);
      background: rgba(255,255,255,.45);
      min-width: 220px;
    }
    .miniNote strong{font-size:13px}
    .miniNote span{font-size:12px; color:var(--muted); line-height:1.4}

    .sideStack{
      display:grid;
      gap:14px;
    }
    .sideCard{
      border:1px solid rgba(31,35,40,.10);
      background: linear-gradient(180deg, rgba(255,255,255,.70), rgba(255,255,255,.52));
      box-shadow: var(--shadow2);
      border-radius: var(--radius);
      padding: 16px;
      position:relative;
      overflow:hidden;
    }
    .sideCard:after{
      content:"";
      position:absolute;
      right:-30px; top:-40px;
      width:140px; height:140px;
      background: radial-gradient(circle at 30% 30%, rgba(43,111,255,.22), transparent 62%);
      transform: rotate(8deg);
      pointer-events:none;
    }
    .sideCard > *{position:relative; z-index:1}
    .sideTitle{
      display:flex; align-items:center; justify-content:space-between; gap:10px;
      margin-bottom:10px;
    }
    .sideTitle h2{
      margin:0;
      font-size:14px;
      letter-spacing:-.2px;
    }
    .badge{
      font-size:12px;
      padding:7px 10px;
      border-radius:999px;
      background: rgba(43,111,255,.10);
      border:1px solid rgba(43,111,255,.20);
      color:#1f4fbf;
      white-space:nowrap;
    }

    .stepList{
      list-style:none;
      margin:0;
      padding:0;
      display:grid;
      gap:10px;
    }
    .stepItem{
      display:flex; gap:10px; align-items:flex-start;
      padding:10px 12px;
      border-radius:14px;
      border:1px solid rgba(31,35,40,.08);
      background: rgba(255,255,255,.55);
      transition: transform .15s ease, border-color .15s ease, background .15s ease;
    }
    .stepItem:hover{
      transform: translateY(-1px);
      border-color: rgba(31,35,40,.14);
      background: rgba(255,255,255,.70);
    }
    .stepNum{
      width:26px; height:26px; border-radius:10px;
      display:grid; place-items:center;
      background: linear-gradient(135deg, rgba(43,111,255,.18), rgba(122,76,255,.14));
      border:1px solid rgba(31,35,40,.10);
      font-weight:900;
      font-size:12px;
      color:#2b6fff;
      flex:0 0 auto;
      margin-top:1px;
    }
    .stepText strong{display:block; font-size:13px; margin-bottom:2px}
    .stepText span{display:block; font-size:12px; color:var(--muted); line-height:1.45}

    .section{
      padding: 10px 0 22px;
    }
    .toc{
      border:1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.58);
      border-radius: var(--radius);
      box-shadow: 0 10px 26px rgba(31,35,40,.06);
      overflow:hidden;
    }
    .tocHeader{
      display:flex; align-items:center; justify-content:space-between; gap:12px;
      padding:14px 16px;
      border-bottom:1px solid rgba(31,35,40,.08);
      background: linear-gradient(180deg, rgba(255,255,255,.70), rgba(255,255,255,.50));
    }
    .tocHeader h2{
      margin:0;
      font-size:14px;
      letter-spacing:-.2px;
    }
    .tocHeader .hint{
      font-size:12px; color:var(--muted);
      white-space:nowrap;
    }
    .tocBody{
      padding:14px 16px;
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:10px 12px;
      align-items:start;
    }
    .tocLink{
      display:flex; gap:10px; align-items:flex-start;
      text-decoration:none;
      border-radius:14px;
      padding:10px 12px;
      border:1px solid rgba(31,35,40,.08);
      background: rgba(255,255,255,.55);
      transition: transform .15s ease, border-color .15s ease, background .15s ease;
    }
    .tocLink:hover{
      transform: translateY(-1px);
      border-color: rgba(31,35,40,.14);
      background: rgba(255,255,255,.72);
    }
    .tocLink .k{
      width:26px; height:26px; border-radius:10px;
      display:grid; place-items:center;
      background: rgba(43,111,255,.10);
      border:1px solid rgba(43,111,255,.18);
      color:#1f4fbf;
      font-weight:900;
      font-size:12px;
      flex:0 0 auto;
      margin-top:1px;
    }
    .tocLink .t{
      display:flex; flex-direction:column; gap:2px;
    }
    .tocLink .t strong{font-size:13px}
    .tocLink .t span{font-size:12px; color:var(--muted); line-height:1.35}

    .contentGrid{
      display:grid;
      grid-template-columns: 1fr;
      gap:16px;
      margin-top:16px;
    }

    .articleCard{
      border:1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.60);
      border-radius: var(--radius);
      box-shadow: 0 12px 26px rgba(31,35,40,.06);
      padding: 18px;
      overflow:hidden;
      position:relative;
    }
    .articleCard:before{
      content:"";
      position:absolute; inset:-1px;
      background:
        radial-gradient(520px 280px at 10% 0%, rgba(43,111,255,.12), transparent 58%),
        radial-gradient(500px 260px at 90% 20%, rgba(122,76,255,.10), transparent 60%);
      pointer-events:none;
      opacity:.55;
    }
    .articleCard > *{position:relative; z-index:1}
    .sectionTitle{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:14px;
      margin-bottom:10px;
    }
    .sectionTitle h2{
      margin:0;
      font-size:18px;
      letter-spacing:-.25px;
    }
    .sectionTitle .tag{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 10px;
      border-radius:999px;
      border:1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.55);
      color:var(--muted);
      font-size:12px;
      white-space:nowrap;
    }
    .tagDot{
      width:10px; height:10px; border-radius:50%;
      background: linear-gradient(135deg, var(--brand), var(--brand2));
      box-shadow: 0 10px 18px rgba(43,111,255,.18);
    }
    .p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
    }
    .p + .p{margin-top:10px}

    .twoCol{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:12px;
      margin-top:12px;
      align-items:start;
    }
    .box{
      border:1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.55);
      border-radius: 16px;
      padding: 12px 12px;
    }
    .box h3{
      margin:0 0 6px 0;
      font-size:14px;
      letter-spacing:-.15px;
    }
    .box ul{
      margin:0;
      padding:0;
      list-style:none;
      display:grid;
      gap:8px;
    }
    .box li{
      display:flex; gap:10px; align-items:flex-start;
      color:var(--muted);
      font-size:13px;
      line-height:1.55;
    }
    .tick{
      width:18px; height:18px; border-radius:8px;
      background: rgba(43,111,255,.10);
      border:1px solid rgba(43,111,255,.18);
      color:#1f4fbf;
      display:grid; place-items:center;
      font-weight:900;
      flex:0 0 auto;
      margin-top:1px;
      font-size:12px;
    }

    .subStep{
      margin-top:12px;
      display:grid;
      gap:10px;
    }
    .subRow{
      display:flex;
      gap:12px;
      align-items:flex-start;
      padding:12px;
      border-radius: 16px;
      border:1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.55);
      transition: transform .15s ease, border-color .15s ease;
    }
    .subRow:hover{transform: translateY(-1px); border-color: rgba(31,35,40,.16)}
    .subIcon{
      width:34px; height:34px; border-radius:14px;
      background: linear-gradient(135deg, rgba(43,111,255,.16), rgba(122,76,255,.12));
      border:1px solid rgba(31,35,40,.10);
      display:grid; place-items:center;
      color:#2b6fff;
      font-weight:900;
      flex:0 0 auto;
      box-shadow: 0 10px 22px rgba(43,111,255,.10);
      margin-top:1px;
    }
    .subRow strong{display:block; font-size:14px; margin-bottom:4px}
    .subRow span{display:block; color:var(--muted); font-size:13px; line-height:1.6}

    .anchors{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      margin-top:14px;
    }
    .chipLink{
      text-decoration:none;
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:10px 12px;
      border-radius:999px;
      border:1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.58);
      color:#2a313a;
      font-weight:700;
      font-size:13px;
      transition: transform .15s ease, background .15s ease, border-color .15s ease;
      white-space:nowrap;
    }
    .chipLink:hover{transform: translateY(-1px); background: rgba(255,255,255,.72); border-color: rgba(31,35,40,.16)}
    .arrow{
      width:18px; height:18px; border-radius:8px;
      background: rgba(43,111,255,.10);
      border:1px solid rgba(43,111,255,.18);
      display:grid; place-items:center;
      color:#1f4fbf;
      font-size:12px;
      font-weight:900;
    }

    .faq{
      margin-top:16px;
    }
    .faqGrid{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:12px;
      margin-top:10px;
    }
    details{
      border:1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.58);
      border-radius: 16px;
      padding: 12px 12px;
      transition: border-color .15s ease, transform .15s ease;
    }
    details[open]{border-color: rgba(43,111,255,.25)}
    details:hover{border-color: rgba(31,35,40,.16)}
    summary{
      cursor:pointer;
      list-style:none;
      font-weight:900;
      font-size:14px;
      letter-spacing:-.15px;
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:12px;
    }
    summary::-webkit-details-marker{display:none}
    .chev{
      width:26px; height:26px; border-radius:12px;
      border:1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.55);
      display:grid; place-items:center;
      color:#2a313a;
      flex:0 0 auto;
      transition: transform .18s ease;
      margin-top:-2px;
    }
    details[open] .chev{transform: rotate(180deg)}
    .faqA{
      margin-top:10px;
      color:var(--muted);
      font-size:13px;
      line-height:1.75;
    }
    .faqA ul{
      margin:8px 0 0 0;
      padding:0 0 0 18px;
      color:var(--muted);
    }
    .faqA li{margin:6px 0}

    .ctaStrip{
      margin-top:16px;
      display:flex;
      gap:12px;
      align-items:center;
      justify-content:space-between;
      padding: 14px 16px;
      border:1px solid rgba(31,35,40,.10);
      background: linear-gradient(180deg, rgba(255,255,255,.68), rgba(255,255,255,.52));
      border-radius: var(--radius);
      box-shadow: 0 12px 26px rgba(31,35,40,.06);
    }
    .ctaStrip .left{
      display:flex; flex-direction:column; gap:4px;
      min-width: 220px;
    }
    .ctaStrip .left strong{font-size:15px}
    .ctaStrip .left span{color:var(--muted); font-size:13px; line-height:1.5}
    .ctaStrip .right{
      display:flex; gap:10px; flex-wrap:wrap; justify-content:flex-end;
    }

    footer{
      margin-top: 16px;
      background: rgba(255,255,255,.45);
      border-top:1px solid rgba(31,35,40,.10);
      padding: 18px 0 26px;
    }
    .footGrid{
      display:grid;
      grid-template-columns: 1.1fr .9fr;
      gap:14px;
      align-items:start;
    }
    .footCard{
      border:1px solid rgba(31,35,40,.10);
      border-radius: var(--radius);
      background: rgba(255,255,255,.62);
      padding: 14px 16px;
    }
    .footCard h2{
      margin:0 0 8px 0;
      font-size:14px;
      letter-spacing:-.15px;
    }
    .kv{
      display:grid;
      gap:8px;
      margin-top:8px;
      color:var(--muted);
      font-size:13px;
      line-height:1.6;
    }
    .kv a{
      color:#1f4fbf;
      text-decoration:none;
      border-bottom:1px dashed rgba(31,79,191,.35);
    }
    .kv a:hover{border-bottom-style:solid}
    .footLinks{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:10px;
    }
    .footLinks a{
      text-decoration:none;
      border:1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.55);
      border-radius: 16px;
      padding: 10px 12px;
      font-weight:800;
      font-size:13px;
      color:#2a313a;
      transition: transform .15s ease, border-color .15s ease, background .15s ease;
      display:flex;
      justify-content:space-between;
      gap:10px;
      align-items:center;
    }
    .footLinks a:hover{transform: translateY(-1px); border-color: rgba(31,35,40,.16); background: rgba(255,255,255,.72)}
    .footLinks .small{
      font-weight:900;
      color:#1f4fbf;
      border:1px solid rgba(43,111,255,.18);
      background: rgba(43,111,255,.10);
      width:26px; height:26px; border-radius:12px;
      display:grid; place-items:center;
      flex:0 0 auto;
    }

    .copyright{
      margin-top:12px;
      color:var(--muted);
      font-size:12px;
      text-align:center;
    }

    @media (max-width: 900px){
      .heroGrid{grid-template-columns:1fr; }
      .miniNote{margin-left:0; min-width:auto; width:100%}
      .tocBody{grid-template-columns: 1fr}
      .twoCol{grid-template-columns:1fr}
      .faqGrid{grid-template-columns:1fr}
      .footGrid{grid-template-columns:1fr}
      .footLinks{grid-template-columns:1fr}
      .navCTA{display:none}
    }
    @media (max-width: 720px){
      .menu{display:none}
      .mobileToggle{display:inline-flex; align-items:center; justify-content:center}
      .mobileMenu{display:block}
      nav{gap:0}
      .mobileMenu.hidden{display:none}
      .heroCard{padding:18px}
      .sideCard{padding:14px}
      .faq{margin-top:14px}
      header{position:sticky}
    }

    /* subtle entrance */
    .reveal{
      opacity:0;
      transform: translateY(10px);
      transition: opacity .5s ease, transform .5s ease;
    }
    .reveal.show{
      opacity:1;
      transform: translateY(0);
    }
    @media (prefers-reduced-motion: reduce){
      .reveal{transition:none}
      .reveal.show{transform:none}
      *{scroll-behavior:auto !important}
    }