:root{
      --bg0:#f6fbf7;
      --bg1:#eef7f0;
      --card:#ffffff;
      --text:#1b2b23;
      --muted:#516357;
      --line:rgba(27,43,35,.12);
      --shadow:0 10px 28px rgba(16,55,33,.08);
      --accent:#1b7a3a;
      --accent2:#2aa35a;
      --accentSoft:rgba(27,122,58,.12);
      --chip:#eafff0;
      --focus:rgba(42,163,90,.28);
      --radius:18px;
      --radius2:14px;
      --container:1120px;
    }

    *{box-sizing:border-box}
    html,body{height:100%}
    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:var(--text);
      background:
        radial-gradient(900px 460px at 12% 5%, rgba(42,163,90,.14), transparent 60%),
        radial-gradient(760px 420px at 90% 18%, rgba(27,122,58,.12), transparent 62%),
        linear-gradient(180deg, var(--bg0), #f7fbf8 45%, #ffffff 100%);
    }

    a{color:inherit; text-decoration:none}
    a:focus-visible, button:focus-visible, summary:focus-visible{
      outline:3px solid var(--focus);
      outline-offset:3px;
      border-radius:10px;
    }

    .container{
      width:100%;
      max-width:var(--container);
      padding:0 18px;
      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:1000;
      background:#fff; border:1px solid var(--line);
      padding:10px 12px; border-radius:12px; box-shadow:var(--shadow);
    }

    header{
      position:sticky; top:0; z-index:50;
      background:rgba(246,251,247,.72);
      backdrop-filter:saturate(140%) blur(10px);
      border-bottom:1px solid rgba(27,43,35,.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:150px;
    }
    .logo{
      width:40px; height:40px; border-radius:14px;
      display:flex; align-items:center; justify-content:center;
      background:linear-gradient(135deg, rgba(27,122,58,.14), rgba(42,163,90,.10));
      border:1px solid rgba(27,122,58,.18);
      box-shadow:0 10px 24px rgba(27,122,58,.10);
      font-weight:900; letter-spacing:.5px;
      color:var(--accent);
    }
    .brand-text{
      display:flex; flex-direction:column; line-height:1.05;
    }
    .brand-text strong{font-size:14px}
    .brand-text span{font-size:12px; color:var(--muted)}
    nav{
      display:flex; align-items:center; gap:18px; justify-content:flex-end;
      flex:1;
    }
    .menu{
      display:flex; align-items:center; gap:16px;
      color:var(--muted);
      font-size:14px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .menu a{
      padding:8px 10px;
      border-radius:12px;
      border:1px solid transparent;
      transition:background .2s ease, border-color .2s ease, transform .2s ease;
    }
    .menu a:hover{
      background:rgba(42,163,90,.08);
      border-color:rgba(27,122,58,.15);
      color:var(--text);
      transform:translateY(-1px);
    }
    .nav-cta{
      display:flex; align-items:center; gap:10px;
    }
    .btn{
      display:inline-flex; align-items:center; justify-content:center;
      gap:10px;
      padding:10px 14px;
      border-radius:14px;
      border:1px solid rgba(27,122,58,.20);
      background:linear-gradient(180deg, rgba(42,163,90,.12), rgba(27,122,58,.06));
      color:var(--text);
      font-weight:700;
      font-size:14px;
      cursor:pointer;
      transition:transform .15s ease, box-shadow .15s ease, background .2s ease, border-color .2s ease;
      white-space:nowrap;
    }
    .btn:hover{
      transform:translateY(-1px);
      box-shadow:0 12px 24px rgba(27,122,58,.12);
      border-color:rgba(27,122,58,.28);
    }
    .btn-primary{
      background:linear-gradient(180deg, var(--accent2), var(--accent));
      border-color:rgba(0,0,0,.08);
      color:#083012;
      box-shadow:0 10px 20px rgba(27,122,58,.18);
    }
    .btn-primary:hover{
      box-shadow:0 14px 30px rgba(27,122,58,.22);
    }
    .btn svg{flex:0 0 auto}

    .mobile-toggle{
      display:none;
      width:42px; height:42px;
      border-radius:14px;
      border:1px solid rgba(27,43,35,.12);
      background:#fff;
      cursor:pointer;
      align-items:center; justify-content:center;
      transition:transform .15s ease;
    }
    .mobile-toggle:hover{transform:translateY(-1px)}
    .mobile-panel{
      display:none;
      padding:10px 0 16px;
    }
    .mobile-panel .stack{
      display:flex; flex-direction:column; gap:8px;
    }
    .mobile-panel .stack a{
      padding:12px 12px;
      border:1px solid rgba(27,43,35,.10);
      border-radius:14px;
      background:#fff;
      color:var(--text);
    }

    .hero{
      padding:26px 0 10px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns: 1.25fr .75fr;
      gap:18px;
      align-items:start;
    }
    .hero-card{
      background:linear-gradient(180deg, rgba(255,255,255,.88), rgba(255,255,255,.72));
      border:1px solid rgba(27,43,35,.12);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .hero-card::before{
      content:"";
      position:absolute; inset:-2px;
      background:
        radial-gradient(520px 220px at 10% 0%, rgba(42,163,90,.22), transparent 60%),
        radial-gradient(460px 200px at 80% 20%, rgba(27,122,58,.18), transparent 62%);
      pointer-events:none;
      opacity:.85;
    }
    .hero-inner{
      position:relative;
      padding:22px 20px 18px;
    }
    .kicker{
      display:flex; align-items:center; gap:10px;
      color:var(--muted);
      font-size:14px;
      margin-bottom:10px;
    }
    .dot{
      width:10px; height:10px; border-radius:50%;
      background:rgba(42,163,90,.95);
      box-shadow:0 0 0 6px rgba(42,163,90,.12);
    }
    h1{
      margin:0;
      font-size:28px;
      letter-spacing:-.6px;
      line-height:1.18;
    }
    .lead{
      margin:10px 0 14px;
      color:var(--muted);
      font-size:15.5px;
      line-height:1.6;
      max-width:62ch;
    }
    .hero-actions{
      display:flex; gap:12px; flex-wrap:wrap;
      align-items:center;
      margin-top:10px;
    }
    .ghost{
      background:#fff;
      border:1px solid rgba(27,43,35,.12);
      box-shadow:none;
    }
    .ghost:hover{
      box-shadow:0 12px 24px rgba(16,55,33,.08);
    }

    .hero-meta{
      margin-top:14px;
      display:flex; gap:10px; flex-wrap:wrap;
    }
    .chip{
      background:var(--chip);
      border:1px solid rgba(27,122,58,.18);
      color:#0c3b20;
      padding:8px 10px;
      border-radius:999px;
      font-weight:700;
      font-size:12.5px;
      letter-spacing:.2px;
      display:inline-flex; align-items:center; gap:8px;
    }
    .chip svg{opacity:.9}

    .aside-card{
      border-radius:var(--radius);
      border:1px solid rgba(27,43,35,.12);
      background:linear-gradient(180deg, #ffffff, rgba(255,255,255,.86));
      box-shadow:0 10px 26px rgba(16,55,33,.06);
      padding:16px;
      position:relative;
      overflow:hidden;
    }
    .aside-card::after{
      content:"";
      position:absolute; right:-40px; top:-40px;
      width:140px; height:140px; border-radius:40px;
      background:radial-gradient(circle at 30% 30%, rgba(42,163,90,.22), transparent 60%);
      transform:rotate(16deg);
      pointer-events:none;
    }
    .aside-title{
      margin:0 0 10px;
      font-size:15px;
      letter-spacing:-.2px;
    }
    .aside-list{
      display:flex; flex-direction:column; gap:10px;
      margin:0; padding:0; list-style:none;
    }
    .aside-item{
      display:flex; gap:10px; align-items:flex-start;
      padding:12px 12px;
      border:1px solid rgba(27,43,35,.10);
      border-radius:14px;
      background:rgba(255,255,255,.85);
      transition:transform .18s ease, border-color .18s ease, background .18s ease;
    }
    .aside-item:hover{
      transform:translateY(-2px);
      border-color:rgba(27,122,58,.22);
      background:#fff;
    }
    .badge{
      width:28px; height:28px; border-radius:10px;
      background:rgba(42,163,90,.12);
      border:1px solid rgba(27,122,58,.18);
      display:flex; align-items:center; justify-content:center;
      color:var(--accent);
      flex:0 0 auto;
    }
    .aside-item strong{display:block; font-size:13.5px; line-height:1.2}
    .aside-item span{display:block; font-size:12.5px; color:var(--muted); margin-top:3px; line-height:1.35}

    .section{
      padding:14px 0 0;
    }

    .section-head{
      display:flex; align-items:flex-end; justify-content:space-between; gap:14px;
      margin:14px 0 12px;
    }
    .section-head h2{
      margin:0;
      font-size:18px;
      letter-spacing:-.3px;
    }
    .section-head p{
      margin:0;
      color:var(--muted);
      font-size:13.5px;
      line-height:1.5;
      max-width:58ch;
    }

    .anchor-nav{
      background:#fff;
      border:1px solid rgba(27,43,35,.10);
      border-radius:var(--radius);
      padding:14px;
      box-shadow:0 8px 20px rgba(16,55,33,.05);
    }
    .anchor-row{
      display:flex; flex-wrap:wrap; gap:10px;
      align-items:center; justify-content:flex-start;
    }
    .anchor{
      display:inline-flex; align-items:center; gap:10px;
      padding:10px 12px;
      border-radius:999px;
      border:1px solid rgba(27,43,35,.12);
      background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,255,255,.84));
      color:var(--text);
      font-weight:700;
      font-size:13.5px;
      transition:transform .16s ease, box-shadow .16s ease, border-color .16s ease;
    }
    .anchor:hover{
      transform:translateY(-1px);
      border-color:rgba(27,122,58,.24);
      box-shadow:0 10px 20px rgba(27,122,58,.10);
    }
    .anchor svg{opacity:.9}

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

    .card{
      background:#fff;
      border:1px solid rgba(27,43,35,.10);
      border-radius:var(--radius);
      box-shadow:0 10px 24px rgba(16,55,33,.05);
      overflow:hidden;
    }
    .card-inner{padding:16px}
    .card h3{
      margin:0 0 8px;
      font-size:16px;
      letter-spacing:-.25px;
    }
    .card p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.65;
    }

    .steps{
      display:flex;
      flex-direction:column;
      gap:10px;
      margin-top:12px;
    }
    .step{
      display:flex; gap:12px; align-items:flex-start;
      padding:14px 14px;
      border:1px solid rgba(27,43,35,.10);
      border-radius:16px;
      background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(255,255,255,.86));
      transition:transform .18s ease, border-color .18s ease;
    }
    .step:hover{
      transform:translateY(-2px);
      border-color:rgba(27,122,58,.22);
    }
    .step-num{
      width:32px; height:32px;
      border-radius:12px;
      background:rgba(42,163,90,.12);
      border:1px solid rgba(27,122,58,.18);
      color:var(--accent);
      display:flex; align-items:center; justify-content:center;
      font-weight:900;
      flex:0 0 auto;
    }
    .step strong{display:block; font-size:14.5px; margin-top:1px}
    .step span{display:block; color:var(--muted); font-size:13.5px; line-height:1.55; margin-top:4px}

    .evidence{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:14px;
    }
    .evidence .mini{
      border-radius:var(--radius2);
      border:1px solid rgba(27,43,35,.10);
      background:rgba(255,255,255,.9);
      padding:14px;
    }
    .mini h3{
      margin:0 0 8px;
      font-size:15px;
      letter-spacing:-.2px;
      display:flex; align-items:center; gap:10px;
    }
    .mini p{
      margin:0;
      color:var(--muted);
      font-size:13.8px;
      line-height:1.6;
    }
    .list{
      margin:10px 0 0; padding:0; list-style:none;
      display:flex; flex-direction:column; gap:9px;
    }
    .li{
      display:flex; gap:10px; align-items:flex-start;
      color:var(--muted);
      font-size:13.5px;
      line-height:1.45;
      padding:10px 10px;
      border-radius:14px;
      border:1px solid rgba(27,43,35,.08);
      background:rgba(234,247,240,.55);
    }
    .tick{
      width:22px; height:22px; border-radius:9px;
      background:rgba(42,163,90,.12);
      border:1px solid rgba(27,122,58,.18);
      display:flex; align-items:center; justify-content:center;
      color:var(--accent);
      flex:0 0 auto;
      margin-top:1px;
    }

    .case-grid{
      display:grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap:12px;
    }
    .case{
      padding:14px;
      border-radius:var(--radius);
      border:1px solid rgba(27,43,35,.10);
      background:linear-gradient(180deg, rgba(255,255,255,.95), rgba(255,255,255,.86));
      box-shadow:0 10px 22px rgba(16,55,33,.04);
      transition:transform .18s ease, border-color .18s ease;
    }
    .case:hover{
      transform:translateY(-2px);
      border-color:rgba(27,122,58,.20);
    }
    .case .tag{
      display:inline-flex; align-items:center; gap:8px;
      padding:7px 10px;
      border-radius:999px;
      background:rgba(234,247,240,.7);
      border:1px solid rgba(27,122,58,.14);
      color:#0c3b20;
      font-weight:800;
      font-size:12.5px;
    }
    .case h3{margin:10px 0 8px; font-size:15px; letter-spacing:-.2px}
    .case p{margin:0; color:var(--muted); font-size:13.5px; line-height:1.55}

    details{
      border:1px solid rgba(27,43,35,.10);
      background:#fff;
      border-radius:var(--radius);
      box-shadow:0 8px 20px rgba(16,55,33,.04);
      overflow:hidden;
    }
    summary{
      list-style:none;
      cursor:pointer;
      padding:14px 16px;
      display:flex; align-items:center; justify-content:space-between; gap:12px;
      font-weight:900;
      letter-spacing:-.2px;
      font-size:14.5px;
      background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(255,255,255,.9));
    }
    summary::-webkit-details-marker{display:none}
    .sum-right{
      display:flex; align-items:center; gap:10px; color:var(--muted);
      font-weight:700; font-size:13px;
    }
    .chev{
      width:34px; height:34px;
      border-radius:14px;
      border:1px solid rgba(27,43,35,.12);
      background:rgba(234,247,240,.55);
      display:flex; align-items:center; justify-content:center;
      transition:transform .2s ease;
      flex:0 0 auto;
    }
    details[open] .chev{transform:rotate(180deg)}
    .faq-inner{
      padding:0 16px 16px;
      color:var(--muted);
      font-size:14px;
      line-height:1.7;
    }
    .faq-inner strong{color:var(--text)}

    .faq-grid{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:12px;
    }

    .conclude{
      display:flex; align-items:flex-start; justify-content:space-between; gap:14px;
      padding:16px;
      border-radius:var(--radius);
      border:1px solid rgba(27,43,35,.10);
      background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,255,255,.84));
      box-shadow:0 10px 26px rgba(16,55,33,.05);
    }
    .conclude h2{
      margin:0 0 8px;
      font-size:18px;
      letter-spacing:-.3px;
    }
    .conclude p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.7;
      max-width:68ch;
    }

    figure{
      margin:0;
      border-radius:var(--radius);
      overflow:hidden;
      border:1px solid rgba(27,43,35,.10);
      box-shadow:0 10px 24px rgba(16,55,33,.05);
      background:#fff;
    }
    .img-wrap{
      padding:12px;
      background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,255,255,.84));
    }
    img{
      width:100%;
      max-width:100%;
      height:auto;
      display:block;
      border-radius:14px;
    }
    .img-caption{
      padding:10px 12px 14px;
      color:var(--muted);
      font-size:13.5px;
      line-height:1.55;
    }

    footer{
      margin-top:14px;
      background:#eaf6ee;
      border-top:1px solid rgba(27,43,35,.10);
      color:#143224;
    }
    .footer-inner{
      padding:18px 0 14px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap:14px;
      align-items:start;
    }
    .footer-card{
      border-radius:var(--radius);
      border:1px solid rgba(27,43,35,.10);
      background:rgba(255,255,255,.78);
      padding:14px;
    }
    .footer-card h3{
      margin:0 0 8px;
      font-size:15px;
      letter-spacing:-.2px;
    }
    .footer-card p{
      margin:0;
      color:#2b4a35;
      font-size:13.5px;
      line-height:1.6;
    }
    .links{
      display:flex; flex-wrap:wrap; gap:10px;
      margin-top:10px;
    }
    .pill-link{
      padding:9px 10px;
      border-radius:999px;
      border:1px solid rgba(27,43,35,.12);
      background:#fff;
      color:#173524;
      font-weight:800;
      font-size:12.8px;
      transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease;
    }
    .pill-link:hover{
      transform:translateY(-1px);
      box-shadow:0 12px 22px rgba(16,55,33,.10);
      border-color:rgba(27,122,58,.22);
    }

    .copyright{
      padding-top:10px;
      border-top:1px solid rgba(27,43,35,.10);
      margin-top:14px;
      display:flex;
      justify-content:space-between;
      gap:10px;
      flex-wrap:wrap;
      font-size:12.8px;
      color:#2b4a35;
    }
    .to-top{
      display:inline-flex; align-items:center; gap:10px;
      padding:8px 10px;
      border-radius:999px;
      border:1px solid rgba(27,43,35,.12);
      background:rgba(255,255,255,.75);
      cursor:pointer;
      font-weight:900;
    }

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

    @media (max-width: 980px){
      .hero-grid{grid-template-columns:1fr; gap:12px}
      .grid-2{grid-template-columns:1fr}
      .evidence{grid-template-columns:1fr}
      .case-grid{grid-template-columns:1fr}
      .faq-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
      .menu{display:none}
      .nav-cta{display:none}
      .mobile-toggle{display:flex}
      .mobile-panel{display:block}
      header{position:sticky}
    }

    @media (prefers-reduced-motion: reduce){
      .reveal{transition:none}
      .step,.case,.menu a,.anchor,.aside-item,.btn,.pill-link{transition:none}
    }