:root{
      --bg:#fbf7f1;
      --paper:#ffffff;
      --ink:#1f2328;
      --muted:#5a616b;
      --line:rgba(31,35,40,.12);
      --shadow:0 16px 40px rgba(31,35,40,.10);
      --shadow2:0 10px 22px rgba(31,35,40,.10);
      --accent:#9b6b2f;
      --accent2:#b18a57;
      --accentInk:#2a1b0b;
      --brand:#3a2a16;
      --link:#0b4aa2;
      --radius:18px;
      --radius2:14px;
      --container:1080px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Arial,sans-serif;
      background:
        radial-gradient(1200px 420px at 18% 0%, rgba(155,107,47,.18), transparent 60%),
        radial-gradient(900px 360px at 86% 10%, rgba(177,138,87,.16), transparent 58%),
        linear-gradient(180deg, #fbf7f1 0%, #f6f0e6 55%, #fbf7f1 100%);
      color:var(--ink);
    }
    a{color:inherit}
    .container{
      width: min(var(--container), calc(100% - 32px));
      margin: 0 auto;
    }

    .topbar{
      position: sticky;
      top:0;
      z-index:20;
      background: rgba(251,247,241,.72);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(31,35,40,.08);
    }
    .topbar-inner{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding: 12px 0;
      gap: 12px;
    }
    .brand{
      display:flex;
      align-items:center;
      gap: 10px;
      min-width: 140px;
    }
    .brand-mark{
      width: 38px;
      height: 38px;
      border-radius: 12px;
      display:grid;
      place-items:center;
      background:
        linear-gradient(145deg, rgba(155,107,47,.22), rgba(177,138,87,.18));
      border: 1px solid rgba(155,107,47,.35);
      box-shadow: 0 10px 18px rgba(155,107,47,.14);
    }
    .brand-mark svg{display:block}
    .brand-text{
      display:flex;
      flex-direction:column;
      line-height:1.05;
    }
    .brand-text strong{
      font-size: 14px;
      letter-spacing:.2px;
      color: var(--brand);
      font-weight: 800;
    }
    .brand-text span{
      font-size: 12px;
      color: var(--muted);
      margin-top: 4px;
    }

    .nav{
      display:flex;
      align-items:center;
      gap: 10px;
      flex-wrap: wrap;
      justify-content:flex-end;
    }
    .nav a{
      text-decoration:none;
      padding: 8px 10px;
      border-radius: 999px;
      color: var(--muted);
      border: 1px solid transparent;
      transition: transform .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
      font-size: 13px;
      user-select:none;
      white-space:nowrap;
    }
    .nav a:hover{
      background: rgba(155,107,47,.10);
      border-color: rgba(155,107,47,.20);
      color: var(--accentInk);
      transform: translateY(-1px);
    }
    .nav-cta{
      padding: 9px 14px !important;
      background: linear-gradient(180deg, rgba(155,107,47,.18), rgba(155,107,47,.10));
      border-color: rgba(155,107,47,.30) !important;
      color: var(--accentInk) !important;
      box-shadow: 0 12px 22px rgba(155,107,47,.12);
    }

    .mobile-toggle{
      display:none;
      border:1px solid rgba(31,35,40,.12);
      background: rgba(255,255,255,.7);
      border-radius: 12px;
      padding: 10px 12px;
      line-height:0;
      cursor:pointer;
      transition: transform .18s ease, background .18s ease;
      user-select:none;
    }
    .mobile-toggle:hover{transform: translateY(-1px)}
    .mobile-toggle svg{display:block}

    .mobile-menu{
      display:none;
      border-top: 1px solid rgba(31,35,40,.08);
      padding: 10px 0 14px;
    }
    .mobile-menu a{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding: 12px 12px;
      margin-top: 8px;
      text-decoration:none;
      border: 1px solid rgba(31,35,40,.10);
      border-radius: 14px;
      background: rgba(255,255,255,.74);
      color: var(--ink);
      transition: transform .18s ease, border-color .18s ease;
      font-size: 14px;
    }
    .mobile-menu a:active{transform: scale(.99)}
    .chev{
      width: 18px; height:18px; opacity:.7;
    }

    header.hero{
      padding: 24px 0 18px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns: 1.15fr .85fr;
      gap: 16px;
      align-items: stretch;
    }
    .hero-card{
      background: linear-gradient(180deg, rgba(255,255,255,.82), rgba(255,255,255,.70));
      border: 1px solid rgba(31,35,40,.10);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 20px;
      position: relative;
      overflow:hidden;
    }
    .hero-card:before{
      content:"";
      position:absolute;
      inset:-2px;
      background:
        radial-gradient(800px 320px at 20% 0%, rgba(155,107,47,.22), transparent 60%),
        radial-gradient(600px 240px at 80% 10%, rgba(177,138,87,.18), transparent 55%);
      pointer-events:none;
      opacity:.9;
    }
    .hero-inner{
      position:relative;
      z-index:1;
      display:flex;
      flex-direction:column;
      gap: 14px;
    }
    .kicker{
      display:flex;
      align-items:center;
      gap: 10px;
      flex-wrap:wrap;
    }
    .kicker .badge{
      display:inline-flex;
      align-items:center;
      gap: 8px;
      padding: 8px 12px;
      border-radius: 999px;
      background: rgba(155,107,47,.10);
      border: 1px solid rgba(155,107,47,.22);
      color: var(--accentInk);
      font-size: 13px;
      font-weight: 650;
      letter-spacing:.2px;
    }
    .dot{
      width: 10px; height:10px; border-radius:50%;
      background: linear-gradient(180deg, rgba(155,107,47,1), rgba(177,138,87,1));
      box-shadow: 0 10px 20px rgba(155,107,47,.25);
    }
    h1{
      margin:0;
      font-size: clamp(22px, 3.2vw, 34px);
      letter-spacing: .2px;
      line-height: 1.15;
      color: #1b1f25;
    }
    .hero-lead{
      margin:0;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.7;
      max-width: 60ch;
    }
    .hero-actions{
      display:flex;
      gap: 12px;
      flex-wrap: wrap;
      align-items:center;
      margin-top: 4px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap: 10px;
      padding: 12px 16px;
      border-radius: 14px;
      border: 1px solid rgba(31,35,40,.12);
      background: rgba(255,255,255,.74);
      color: var(--ink);
      text-decoration:none;
      font-weight: 700;
      transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
      user-select:none;
      font-size: 14px;
      min-height: 44px;
    }
    .btn:active{transform: scale(.99)}
    .btn:hover{
      transform: translateY(-1px);
      box-shadow: 0 14px 26px rgba(31,35,40,.12);
      border-color: rgba(155,107,47,.30);
    }
    .btn-primary{
      background: linear-gradient(180deg, rgba(155,107,47,.30), rgba(155,107,47,.18));
      border-color: rgba(155,107,47,.34);
      color: var(--accentInk);
      box-shadow: 0 18px 30px rgba(155,107,47,.18);
    }
    .btn svg{display:block}
    .hero-meta{
      display:flex;
      gap: 14px;
      flex-wrap: wrap;
      margin-top: 2px;
      padding-top: 8px;
      border-top: 1px dashed rgba(31,35,40,.14);
    }
    .meta-item{
      display:flex;
      gap: 10px;
      align-items:flex-start;
      min-width: 190px;
      flex: 1 1 auto;
    }
    .meta-icon{
      width: 32px; height: 32px;
      border-radius: 12px;
      border: 1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.65);
      display:grid; place-items:center;
      flex: 0 0 auto;
    }
    .meta-item strong{display:block; font-size: 13px; color: #2a2f36}
    .meta-item span{display:block; font-size: 12px; color: var(--muted); margin-top: 3px; line-height:1.4}

    .side-card{
      background: rgba(255,255,255,.70);
      border: 1px solid rgba(31,35,40,.10);
      border-radius: var(--radius);
      box-shadow: var(--shadow2);
      padding: 18px;
      overflow:hidden;
      position:relative;
    }
    .side-card:before{
      content:"";
      position:absolute;
      width: 220px;
      height: 220px;
      border-radius: 50%;
      left: -120px;
      top: -120px;
      background: radial-gradient(circle at 30% 30%, rgba(177,138,87,.28), transparent 60%);
      pointer-events:none;
    }
    .side-inner{
      position:relative;
      z-index:1;
      display:flex;
      flex-direction:column;
      gap: 12px;
      height: 100%;
    }
    .side-title{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap: 12px;
    }
    .side-title h2{
      margin:0;
      font-size: 16px;
      color: #222831;
      letter-spacing:.2px;
    }
    .stamp{
      padding: 8px 10px;
      border-radius: 999px;
      border: 1px solid rgba(155,107,47,.30);
      background: rgba(155,107,47,.10);
      color: var(--accentInk);
      font-weight: 800;
      font-size: 12px;
      letter-spacing:.3px;
      white-space:nowrap;
    }
    .thumb-grid{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
    }
    .thumb{
      border-radius: 14px;
      border: 1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.72);
      overflow:hidden;
    }
    .thumb img{
      display:block;
      width:100%;
      height:auto;
      aspect-ratio: 4/3;
      object-fit: cover;
      background: rgba(31,35,40,.03);
    }
    .thumb span{
      display:block;
      padding: 10px 10px 12px;
      font-size: 12px;
      color: var(--muted);
      line-height: 1.4;
    }
    .quote{
      margin: 0;
      padding: 12px 12px;
      border-radius: 14px;
      border: 1px dashed rgba(31,35,40,.16);
      background: rgba(255,255,255,.50);
      color: var(--muted);
      font-size: 13px;
      line-height: 1.65;
    }

    main{padding: 8px 0 34px}
    section.block{
      margin-top: 14px;
      padding: 0;
    }

    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap: 12px;
      margin-bottom: 10px;
    }
    .section-head h2{
      margin:0;
      font-size: 18px;
      letter-spacing:.2px;
      color: #1f2328;
    }
    .section-head p{
      margin:0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.6;
      max-width: 55ch;
    }

    .grid-2{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      align-items:start;
    }

    .card{
      background: rgba(255,255,255,.72);
      border: 1px solid rgba(31,35,40,.10);
      border-radius: var(--radius);
      padding: 16px;
      box-shadow: 0 10px 24px rgba(31,35,40,.06);
    }

    .toc{
      padding: 14px;
      background:
        linear-gradient(180deg, rgba(255,255,255,.78), rgba(255,255,255,.66));
      border-radius: var(--radius);
      border: 1px solid rgba(31,35,40,.10);
      box-shadow: 0 12px 28px rgba(31,35,40,.06);
    }
    .toc-grid{
      display:grid;
      grid-template-columns: repeat(2, minmax(0,1fr));
      gap: 10px;
    }
    .toc a{
      display:flex;
      gap: 10px;
      align-items:flex-start;
      text-decoration:none;
      padding: 12px 12px;
      border-radius: 14px;
      border: 1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.65);
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
      min-height: 62px;
    }
    .toc a:hover{
      transform: translateY(-1px);
      border-color: rgba(155,107,47,.30);
      background: rgba(155,107,47,.08);
    }
    .toc-num{
      width: 28px; height: 28px;
      border-radius: 10px;
      background: rgba(155,107,47,.14);
      border: 1px solid rgba(155,107,47,.25);
      display:grid; place-items:center;
      color: var(--accentInk);
      font-weight: 900;
      font-size: 12px;
      flex: 0 0 auto;
      margin-top: 2px;
    }
    .toc a strong{
      display:block;
      font-size: 13px;
      color: #1d2127;
      line-height: 1.25;
    }
    .toc a span{
      display:block;
      font-size: 12px;
      color: var(--muted);
      margin-top: 6px;
      line-height:1.4;
    }

    .list{
      margin:0;
      padding:0;
      list-style:none;
      display:flex;
      flex-direction:column;
      gap: 10px;
    }
    .li{
      padding: 12px 12px;
      border-radius: 14px;
      border: 1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.62);
      display:flex;
      gap: 12px;
      align-items:flex-start;
      transition: transform .18s ease, border-color .18s ease;
    }
    .li:hover{
      transform: translateY(-1px);
      border-color: rgba(155,107,47,.30);
    }
    .li .tag{
      flex:0 0 auto;
      padding: 8px 10px;
      border-radius: 999px;
      background: rgba(155,107,47,.10);
      border: 1px solid rgba(155,107,47,.22);
      color: var(--accentInk);
      font-size: 12px;
      font-weight: 850;
      letter-spacing:.2px;
      margin-top: 2px;
      white-space:nowrap;
    }
    .li .text strong{
      display:block;
      font-size: 14px;
      color: #1f2328;
      margin-top: 1px;
    }
    .li .text p{
      margin: 6px 0 0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.65;
    }

    .steps{
      display:grid;
      grid-template-columns: repeat(4, minmax(0,1fr));
      gap: 12px;
    }
    .step{
      padding: 14px;
      border-radius: var(--radius2);
      border: 1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.70);
      position:relative;
      overflow:hidden;
      transition: transform .18s ease, border-color .18s ease;
      min-height: 128px;
    }
    .step:hover{transform: translateY(-1px); border-color: rgba(155,107,47,.32)}
    .step:after{
      content:"";
      position:absolute;
      right:-50px; top:-60px;
      width: 130px; height: 130px;
      border-radius: 50%;
      background: radial-gradient(circle at 30% 30%, rgba(177,138,87,.25), transparent 60%);
      pointer-events:none;
    }
    .step-head{
      position:relative;
      z-index:1;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap: 10px;
      margin-bottom: 10px;
    }
    .step-num{
      width: 34px; height: 34px;
      border-radius: 14px;
      display:grid; place-items:center;
      background: rgba(155,107,47,.14);
      border: 1px solid rgba(155,107,47,.25);
      color: var(--accentInk);
      font-weight: 900;
    }
    .step h3{
      position:relative;
      z-index:1;
      margin: 0;
      font-size: 14px;
      color:#1f2328;
      line-height: 1.25;
    }
    .step p{
      position:relative;
      z-index:1;
      margin: 8px 0 0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.65;
    }

    .faq{
      margin-top: 10px;
    }
    .accordion{
      display:flex;
      flex-direction:column;
      gap: 10px;
    }
    details.faq-item{
      border-radius: var(--radius);
      border: 1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.72);
      padding: 10px 12px;
      box-shadow: 0 10px 24px rgba(31,35,40,.05);
      transition: border-color .18s ease, transform .18s ease;
    }
    details.faq-item[open]{border-color: rgba(155,107,47,.32)}
    summary{
      cursor:pointer;
      list-style:none;
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap: 12px;
      padding: 8px 6px;
      user-select:none;
    }
    summary::-webkit-details-marker{display:none}
    .q{
      display:flex; gap: 10px; align-items:flex-start;
    }
    .q .qmark{
      width: 30px; height: 30px;
      border-radius: 12px;
      background: rgba(155,107,47,.12);
      border: 1px solid rgba(155,107,47,.25);
      display:grid; place-items:center;
      color: var(--accentInk);
      font-weight: 900;
      flex:0 0 auto;
      margin-top: 2px;
    }
    summary strong{
      display:block;
      font-size: 14px;
      color:#1f2328;
      line-height:1.35;
      margin-top: 2px;
    }
    .caret{
      width: 18px; height:18px; opacity:.75;
      flex: 0 0 auto;
      transition: transform .2s ease;
      margin-top: 6px;
    }
    details[open] .caret{transform: rotate(180deg)}
    .a{
      padding: 0 6px 10px 46px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.75;
    }

    .pair{
      display:grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 14px;
      align-items:stretch;
    }
    .callout{
      border-radius: var(--radius);
      border: 1px solid rgba(155,107,47,.22);
      background:
        linear-gradient(180deg, rgba(155,107,47,.12), rgba(255,255,255,.65));
      padding: 16px;
      position:relative;
      overflow:hidden;
    }
    .callout:before{
      content:"";
      position:absolute;
      inset:-2px;
      background:
        radial-gradient(700px 260px at 10% 10%, rgba(155,107,47,.22), transparent 60%),
        radial-gradient(480px 220px at 90% 40%, rgba(177,138,87,.18), transparent 58%);
      opacity:.7;
      pointer-events:none;
    }
    .callout .inner{position:relative; z-index:1}
    .callout h2{
      margin:0 0 8px;
      font-size: 18px;
      letter-spacing:.2px;
      color:#1f2328;
    }
    .callout p{
      margin:0;
      color: var(--muted);
      font-size: 13.5px;
      line-height: 1.75;
    }
    .inline-links{
      display:flex;
      flex-wrap:wrap;
      gap: 10px;
      margin-top: 12px;
    }
    .pill{
      display:inline-flex;
      align-items:center;
      gap: 10px;
      padding: 10px 12px;
      border-radius: 999px;
      border: 1px solid rgba(31,35,40,.12);
      background: rgba(255,255,255,.70);
      text-decoration:none;
      color: #1f2328;
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
      font-weight: 750;
      font-size: 13px;
      user-select:none;
      min-height: 40px;
    }
    .pill:hover{transform: translateY(-1px); border-color: rgba(155,107,47,.32)}
    .pill svg{display:block}

    .contact-card{
      background: rgba(255,255,255,.72);
      border: 1px solid rgba(31,35,40,.10);
      border-radius: var(--radius);
      padding: 16px;
      box-shadow: 0 10px 24px rgba(31,35,40,.06);
      display:flex;
      flex-direction:column;
      gap: 12px;
      position:relative;
      overflow:hidden;
    }
    .contact-card:before{
      content:"";
      position:absolute;
      right:-60px; bottom:-80px;
      width: 220px; height: 220px;
      border-radius: 50%;
      background: radial-gradient(circle at 30% 30%, rgba(155,107,47,.20), transparent 60%);
      pointer-events:none;
    }
    .contact-card .inner{position:relative; z-index:1}
    .contact-grid{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      align-items:start;
    }
    .kv{
      padding: 12px;
      border-radius: 14px;
      border: 1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.62);
    }
    .kv .k{
      font-size: 12px;
      color: var(--muted);
      margin-bottom: 6px;
      letter-spacing:.2px;
    }
    .kv .v{
      font-size: 14px;
      font-weight: 800;
      color:#1f2328;
      line-height: 1.45;
    }
    .qr-row{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      align-items:start;
      margin-top: 2px;
    }
    .qr{
      border-radius: 14px;
      border: 1px solid rgba(31,35,40,.10);
      background: rgba(255,255,255,.62);
      padding: 12px;
    }
    .qr .qr-title{
      font-weight: 900;
      color:#1f2328;
      font-size: 13px;
      margin-bottom: 8px;
    }
    .qr img{
      display:block;
      width: 100%;
      height:auto;
      aspect-ratio: 1/1;
      object-fit: contain;
      background: rgba(31,35,40,.03);
      border-radius: 10px;
      border: 1px dashed rgba(31,35,40,.14);
    }

    .section-subtle{
      background: rgba(255,255,255,.55);
      border: 1px solid rgba(31,35,40,.10);
      border-radius: var(--radius);
      padding: 16px;
      box-shadow: 0 10px 24px rgba(31,35,40,.04);
    }

    .footer{
      background: rgba(255,255,255,.55);
      border-top: 1px solid rgba(31,35,40,.10);
      padding: 18px 0 22px;
    }
    .footer-inner{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap: 14px;
      flex-wrap:wrap;
    }
    .foot-left{
      display:flex;
      flex-direction:column;
      gap: 8px;
      min-width: 260px;
    }
    .foot-left strong{
      font-size: 14px;
      color:#1f2328;
      letter-spacing:.2px;
    }
    .foot-left p{
      margin:0;
      font-size: 13px;
      color: var(--muted);
      line-height: 1.65;
      max-width: 56ch;
    }
    .foot-links{
      display:flex;
      gap: 10px;
      flex-wrap:wrap;
      align-items:center;
      justify-content:flex-end;
    }
    .foot-links a{
      text-decoration:none;
      padding: 10px 12px;
      border-radius: 999px;
      border: 1px solid rgba(31,35,40,.12);
      background: rgba(255,255,255,.64);
      color:#1f2328;
      font-weight: 800;
      font-size: 13px;
      transition: transform .18s ease, border-color .18s ease;
      user-select:none;
      white-space:nowrap;
    }
    .foot-links a:hover{transform: translateY(-1px); border-color: rgba(155,107,47,.32)}
    .copyright{
      margin-top: 10px;
      color: var(--muted);
      font-size: 12px;
    }

    .reveal{
      opacity:0;
      transform: translateY(8px);
      transition: opacity .5s ease, transform .5s ease;
    }
    .reveal.on{
      opacity:1;
      transform: translateY(0);
    }

    @media (max-width: 980px){
      .hero-grid{grid-template-columns: 1fr; }
      .steps{grid-template-columns: repeat(2, minmax(0,1fr));}
      .pair{grid-template-columns: 1fr;}
      .grid-2{grid-template-columns: 1fr;}
      .toc-grid{grid-template-columns: 1fr;}
      .contact-grid{grid-template-columns: 1fr;}
      .qr-row{grid-template-columns: 1fr;}
    }
    @media (max-width: 720px){
      .nav{display:none}
      .mobile-toggle{display:inline-flex}
      .mobile-menu{display:block}
      header.hero{padding: 16px 0 10px}
      .hero-card{padding: 16px}
      .side-card{padding: 14px}
      .steps{grid-template-columns: 1fr;}
      .hero-meta{gap: 10px}
      .meta-item{min-width: 0}
    }

    @media (prefers-reduced-motion: reduce){
      .reveal{transition:none}
      html{scroll-behavior:auto}
      .nav a,.btn,.pill,.li,.step,.toc a{transition:none}
    }