:root{
    --mint-50:#f4fcf8;
    --mint-100:#e6f8ef;
    --mint-200:#cdeee0;
    --mint-300:#a9e6cf;
    --mint-400:#5fd6ae;
    --mint-500:#18bd88;
    --mint-600:#0d9a6b;
    --mint-700:#0a7a55;
    --ink:#0c2a21;
    --ink-2:#22483b;
    --ink-3:#557a6d;
    --line:#dcf0e7;
    --white:#ffffff;
    --shadow-sm:0 6px 18px rgba(13,154,107,.08);
    --shadow-md:0 14px 34px rgba(13,154,107,.12);
    --radius:18px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;scroll-padding-top:88px;}
  body{
    margin:0;
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    font-size:16px;
    line-height:1.75;
    color:var(--ink);
    background-color:#f7fdfa;
    background-image:
      radial-gradient(900px 620px at 6% 0%, rgba(150,224,198,.34), transparent 65%),
      radial-gradient(820px 540px at 100% 14%, rgba(205,238,224,.55), transparent 62%),
      radial-gradient(900px 640px at 48% 100%, rgba(169,230,207,.28), transparent 68%);
    background-repeat:no-repeat;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;}
  h1,h2,h3,h4{margin:0;line-height:1.3;color:var(--ink);}
  p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}
  a{color:inherit;text-decoration:none;}
  .container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px;}

  /* ============ header ============ */
  .site-header{
    position:sticky;top:0;z-index:80;
    background:rgba(255,255,255,.88);
    backdrop-filter:saturate(160%) blur(14px);
    -webkit-backdrop-filter:saturate(160%) blur(14px);
    border-bottom:1px solid var(--line);
  }
  .nav-wrap{
    position:relative;
    display:flex;align-items:center;gap:18px;
    min-height:70px;
  }
  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
  .brand img{width:36px;height:auto;display:block;}
  .brand span{font-size:17px;font-weight:800;letter-spacing:.5px;color:var(--ink);white-space:nowrap;}
  .nav-wrap nav{margin-left:auto;}
  .nav-links{
    display:flex;align-items:center;gap:0;
  }
  .nav-links a{
    display:block;padding:9px 10px;font-size:14px;color:var(--ink-2);
    border-radius:999px;transition:color .2s ease,background .2s ease;
    white-space:nowrap;
  }
  .nav-links a:hover{color:var(--mint-700);background:var(--mint-100);}
  .nav-cta{flex:0 0 auto;}

  .nav-toggle{
    display:none;flex-direction:column;align-items:center;justify-content:center;gap:4px;
    width:40px;height:40px;border-radius:11px;border:1px solid var(--line);
    background:#fff;cursor:pointer;padding:0;margin-left:auto;
  }
  .nav-toggle span{display:block;width:16px;height:2px;background:var(--mint-600);border-radius:2px;transition:transform .25s ease,opacity .25s ease;}

  /* ============ buttons ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 26px;border-radius:999px;font-size:15px;font-weight:700;
    border:1px solid transparent;cursor:pointer;font-family:inherit;
    transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
  }
  .btn-primary{
    background:linear-gradient(135deg,#22c892,#0d9a6b);
    color:#ffffff;
    box-shadow:0 10px 24px rgba(13,154,107,.26);
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(13,154,107,.32);}
  .btn-primary:active{transform:translateY(0);box-shadow:0 6px 16px rgba(13,154,107,.24);}
  .btn-ghost{
    background:#ffffff;color:var(--mint-700);border-color:var(--mint-300);
  }
  .btn-ghost:hover{background:var(--mint-50);transform:translateY(-2px);box-shadow:var(--shadow-sm);}
  .btn-sm{padding:9px 20px;font-size:14px;}

  /* ============ hero ============ */
  .hero{
    position:relative;
    padding:64px 0 76px;
    overflow:hidden;
  }
  .hero::before{
    content:"";position:absolute;top:-180px;right:-160px;width:560px;height:560px;border-radius:50%;
    background:radial-gradient(circle,rgba(95,214,174,.30),rgba(95,214,174,0) 68%);
    pointer-events:none;
  }
  .hero::after{
    content:"";position:absolute;bottom:-220px;left:-180px;width:520px;height:520px;border-radius:50%;
    background:radial-gradient(circle,rgba(24,189,136,.16),rgba(24,189,136,0) 70%);
    pointer-events:none;
  }
  .hero-inner{
    position:relative;z-index:2;
    display:grid;grid-template-columns:1.06fr .94fr;gap:52px;align-items:center;
  }
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 16px;border-radius:999px;
    background:#ffffff;border:1px solid var(--mint-300);
    color:var(--mint-700);font-size:13px;font-weight:700;letter-spacing:.5px;
    box-shadow:0 6px 16px rgba(13,154,107,.08);
  }
  .eyebrow::before{
    content:"";width:7px;height:7px;border-radius:50%;background:var(--mint-500);
    box-shadow:0 0 0 4px rgba(24,189,136,.16);
  }
  .hero h1{
    margin:20px 0 18px;
    font-size:clamp(30px,4.2vw,50px);
    font-weight:800;letter-spacing:-.6px;line-height:1.18;
  }
  .hero h1 .hl{
    display:block;color:var(--mint-600);
    font-size:.78em;letter-spacing:-.2px;margin-top:8px;
  }
  .hero-lead{
    font-size:16.5px;color:var(--ink-3);max-width:560px;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
  .hero-points{
    display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px;
  }
  .hero-points li{
    position:relative;padding-left:20px;font-size:14px;color:var(--ink-2);font-weight:600;
  }
  .hero-points li::before{
    content:"";position:absolute;left:0;top:9px;width:10px;height:10px;border-radius:3px;
    background:linear-gradient(135deg,#22c892,#0d9a6b);transform:rotate(45deg);
  }
  .hero-panel{
    position:relative;
    border-radius:24px;
    padding:20px;
    background:linear-gradient(160deg,#ffffff 0%,#ecfaf3 100%);
    border:1px solid var(--mint-200);
    box-shadow:0 26px 60px rgba(13,154,107,.14);
  }
  .panel-top{display:flex;align-items:center;gap:6px;padding-bottom:14px;border-bottom:1px dashed var(--mint-200);}
  .panel-top .dot{width:8px;height:8px;border-radius:50%;background:var(--mint-300);}
  .panel-top .dot:nth-child(2){background:var(--mint-400);}
  .panel-top .dot:nth-child(3){background:var(--mint-500);}
  .panel-title{margin-left:auto;font-size:12.5px;font-weight:700;color:var(--mint-700);letter-spacing:.6px;}
  .panel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px;}
  .panel-grid span{
    display:flex;align-items:center;justify-content:center;text-align:center;
    padding:16px 6px;border-radius:13px;background:#ffffff;
    border:1px solid var(--mint-200);font-size:13.5px;font-weight:700;color:var(--ink-2);
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .panel-grid span:hover{transform:translateY(-3px);border-color:var(--mint-400);box-shadow:0 10px 22px rgba(13,154,107,.13);}
  .panel-foot{
    margin-top:16px;padding:12px 14px;border-radius:13px;
    background:rgba(13,154,107,.07);color:var(--mint-700);
    font-size:13px;font-weight:700;text-align:center;letter-spacing:.4px;
  }
  @keyframes fadeUp{from{opacity:0;transform:translateY(18px);}to{opacity:1;transform:translateY(0);}}
  .hero-copy > *{animation:fadeUp .7s ease both;}
  .hero-copy > *:nth-child(1){animation-delay:.05s;}
  .hero-copy > *:nth-child(2){animation-delay:.13s;}
  .hero-copy > *:nth-child(3){animation-delay:.21s;}
  .hero-copy > *:nth-child(4){animation-delay:.29s;}
  .hero-copy > *:nth-child(5){animation-delay:.37s;}
  .hero-panel{animation:fadeUp .85s ease .2s both;}

  /* ============ section basics ============ */
  .section{padding:clamp(56px,7vw,84px) 0;}
  .section-alt{
    background:rgba(233,250,243,.62);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
  }
  .sec-head{max-width:760px;margin:0 auto 44px;text-align:center;}
  .sec-tag{
    display:inline-block;padding:5px 15px;border-radius:999px;
    background:#ffffff;border:1px solid var(--mint-300);color:var(--mint-700);
    font-size:12.5px;font-weight:700;letter-spacing:1px;
  }
  .sec-head h2{
    margin:16px 0 14px;
    font-size:clamp(23px,3vw,33px);font-weight:800;letter-spacing:-.4px;
  }
  .sec-desc{color:var(--ink-3);font-size:15.5px;}

  .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;align-items:stretch;}
  .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch;}
  .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;align-items:stretch;}

  .card{
    background:#ffffff;border:1px solid var(--line);border-radius:var(--radius);
    padding:24px;transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--mint-300);}

  /* ============ about ============ */
  .about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:start;}
  .about-grid p{color:var(--ink-3);font-size:15.5px;margin-bottom:16px;}
  .about-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
  .about-tags span{
    padding:7px 15px;border-radius:999px;background:#ffffff;border:1px solid var(--mint-200);
    color:var(--ink-2);font-size:13px;font-weight:600;
  }
  .stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
  .stat-card{
    background:#ffffff;border:1px solid var(--line);border-radius:16px;padding:22px 20px;
    transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
  }
  .stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--mint-300);}
  .stat-num{font-size:30px;font-weight:800;color:var(--mint-600);letter-spacing:-1px;line-height:1.1;}
  .stat-num small{font-size:15px;font-weight:700;margin-left:2px;}
  .stat-label{margin-top:8px;font-size:13.5px;color:var(--ink-3);font-weight:600;}

  .ability-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:38px;}
  .ability-item{
    display:flex;gap:12px;align-items:flex-start;
    background:#ffffff;border:1px solid var(--line);border-radius:14px;padding:18px;
    transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease;
  }
  .ability-item:hover{border-color:var(--mint-300);box-shadow:var(--shadow-sm);transform:translateY(-3px);}
  .ability-item i{
    flex:0 0 auto;width:8px;height:8px;border-radius:50%;margin-top:9px;
    background:linear-gradient(135deg,#22c892,#0d9a6b);
    box-shadow:0 0 0 4px rgba(24,189,136,.13);
  }
  .ability-item h3{font-size:15px;font-weight:700;margin-bottom:3px;}
  .ability-item p{font-size:13.5px;color:var(--ink-3);line-height:1.6;}

  /* ============ service cards ============ */
  .svc-icon{
    display:inline-flex;align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:13px;margin-bottom:16px;
    background:linear-gradient(135deg,#e6f8ef,#cdeee0);
    color:var(--mint-700);
  }
  .svc-icon svg{width:22px;height:22px;}
  .svc-card h3{font-size:16.5px;font-weight:800;margin-bottom:8px;}
  .svc-card p{font-size:13.8px;color:var(--ink-3);line-height:1.72;}

  /* ============ tag cloud ============ */
  .tag-cloud{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;}
  .tag-cloud span{
    padding:10px 18px;border-radius:999px;background:#ffffff;
    border:1px solid var(--line);font-size:14px;font-weight:600;color:var(--ink-2);
    transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease,color .22s ease;
  }
  .tag-cloud span:hover{transform:translateY(-3px);border-color:var(--mint-400);color:var(--mint-700);box-shadow:var(--shadow-sm);}
  .cloud-note{margin-top:26px;text-align:center;font-size:14px;color:var(--ink-3);}

  /* ============ process ============ */
  .step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
  .step-card{
    position:relative;background:#ffffff;border:1px solid var(--line);border-radius:var(--radius);
    padding:26px 22px;transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
  }
  .step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--mint-300);}
  .step-idx{
    display:inline-flex;align-items:center;justify-content:center;
    width:34px;height:34px;border-radius:11px;font-size:14px;font-weight:800;
    background:linear-gradient(135deg,#22c892,#0d9a6b);color:#ffffff;margin-bottom:14px;
  }
  .step-card h3{font-size:16px;font-weight:800;margin-bottom:8px;}
  .step-card p{font-size:13.8px;color:var(--ink-3);line-height:1.7;}

  /* ============ solution cards ============ */
  .sol-card{border-left:4px solid var(--mint-400);}
  .sol-card h3{font-size:16.5px;font-weight:800;margin-bottom:8px;}
  .sol-card p{font-size:13.8px;color:var(--ink-3);line-height:1.72;}

  /* ============ network ============ */
  .net-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
  .net-card{
    display:flex;gap:14px;align-items:flex-start;
    background:#ffffff;border:1px solid var(--line);border-radius:16px;padding:20px;
    transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
  }
  .net-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:var(--mint-300);}
  .net-card .tag{
    flex:0 0 auto;padding:4px 10px;border-radius:8px;font-size:12px;font-weight:700;
    background:var(--mint-100);color:var(--mint-700);
  }
  .net-card h3{font-size:15px;font-weight:700;margin-bottom:4px;}
  .net-card p{font-size:13.5px;color:var(--ink-3);line-height:1.62;}

  /* ============ cases ============ */
  .case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
  .case-card{
    background:#ffffff;border:1px solid var(--line);border-radius:var(--radius);
    overflow:hidden;transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
  }
  .case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--mint-300);}
  .case-media{aspect-ratio:16/9;background:var(--mint-100);overflow:hidden;}
  .case-media img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s ease;}
  .case-card:hover .case-media img{transform:scale(1.04);}
  .case-body{padding:20px 22px 24px;}
  .case-body h3{font-size:16.5px;font-weight:800;margin-bottom:8px;}
  .case-body p{font-size:13.8px;color:var(--ink-3);line-height:1.72;}

  /* ============ compare ============ */
  .compare-grid{display:grid;grid-template-columns:320px 1fr;gap:24px;align-items:start;}
  .score-card{
    background:linear-gradient(165deg,#ffffff 0%,#eafaf3 100%);
    border:1px solid var(--mint-200);border-radius:20px;padding:28px 24px;
    box-shadow:0 18px 40px rgba(13,154,107,.12);text-align:center;
  }
  .score-badge{
    display:inline-block;padding:6px 14px;border-radius:999px;
    background:#ffffff;border:1px solid var(--mint-300);color:var(--mint-700);
    font-size:12.5px;font-weight:700;letter-spacing:1px;
  }
  .score-num{font-size:56px;font-weight:800;line-height:1.1;color:var(--mint-600);letter-spacing:-2px;margin:16px 0 4px;}
  .score-num span{font-size:18px;font-weight:700;color:var(--ink-3);letter-spacing:0;margin-left:2px;}
  .score-card p{font-size:13.8px;color:var(--ink-3);margin-bottom:20px;line-height:1.7;}
  .stars{color:#f0a92a;letter-spacing:3px;font-size:16px;margin-bottom:6px;}

  .table-wrap{
    overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:#ffffff;
    box-shadow:var(--shadow-sm);
  }
  table{width:100%;border-collapse:collapse;min-width:620px;font-size:14.2px;}
  thead th{
    background:#f0fbf6;color:#0a5f47;font-weight:800;font-size:13.8px;
    padding:15px 18px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap;
  }
  tbody td{padding:14px 18px;border-bottom:1px solid #eff9f4;color:var(--ink-2);vertical-align:top;}
  tbody tr:last-child td{border-bottom:none;}
  tbody tr:hover td{background:#f8fdfb;}
  tbody td:first-child{font-weight:700;color:var(--ink);white-space:nowrap;}
  .td-best{color:var(--mint-700);font-weight:700;}

  /* ============ reviews ============ */
  .review-card{
    display:flex;flex-direction:column;gap:14px;
    background:#ffffff;border:1px solid var(--line);border-radius:18px;padding:24px;
    transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
  }
  .review-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--mint-300);}
  .review-head{display:flex;align-items:center;gap:12px;}
  .avatar{
    flex:0 0 auto;width:42px;height:42px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,#e6f8ef,#a9e6cf);color:var(--mint-700);
    font-weight:800;font-size:16px;
  }
  .review-head strong{display:block;font-size:14.5px;font-weight:800;color:var(--ink);}
  .review-head em{display:block;font-style:normal;font-size:12.5px;color:var(--ink-3);margin-top:1px;}
  .review-card p{font-size:14px;color:var(--ink-3);line-height:1.75;}

  /* ============ articles ============ */
  .article-list{display:flex;flex-direction:column;gap:14px;}
  .article-item{
    display:flex;align-items:center;gap:16px;
    background:#ffffff;border:1px solid var(--line);border-radius:16px;padding:20px 22px;
    transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
  }
  .article-item:hover{transform:translateX(4px);box-shadow:var(--shadow-sm);border-color:var(--mint-300);}
  .article-tag{
    flex:0 0 auto;padding:5px 12px;border-radius:8px;font-size:12px;font-weight:700;
    background:var(--mint-100);color:var(--mint-700);white-space:nowrap;
  }
  .article-main{flex:1 1 auto;min-width:0;}
  .article-main h3{font-size:15.5px;font-weight:800;margin-bottom:4px;transition:color .2s ease;}
  .article-item:hover .article-main h3{color:var(--mint-700);}
  .article-main p{font-size:13.5px;color:var(--ink-3);line-height:1.6;}
  .article-arrow{
    flex:0 0 auto;color:var(--mint-500);font-weight:800;font-size:16px;transition:transform .24s ease;
  }
  .article-item:hover .article-arrow{transform:translateX(4px);}

  /* ============ faq ============ */
  .faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;margin:0 auto;}
  .faq-item{
    background:#ffffff;border:1px solid var(--line);border-radius:14px;
    padding:0 20px;transition:border-color .25s ease,box-shadow .25s ease;
  }
  .faq-item[open]{border-color:var(--mint-300);box-shadow:var(--shadow-sm);}
  .faq-item summary{
    position:relative;cursor:pointer;list-style:none;
    padding:16px 28px 16px 0;font-size:15.5px;font-weight:700;color:var(--ink);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{
    content:"";position:absolute;right:2px;top:50%;width:9px;height:9px;
    border-right:2px solid var(--mint-600);border-bottom:2px solid var(--mint-600);
    transform:translateY(-70%) rotate(45deg);transition:transform .25s ease;
  }
  .faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg);}
  .faq-item p{padding:0 0 18px;font-size:14.2px;color:var(--ink-3);line-height:1.78;}

  /* ============ contact / form ============ */
  .contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:start;}
  .form-card{
    background:#ffffff;border:1px solid var(--line);border-radius:20px;padding:30px;
    box-shadow:var(--shadow-sm);
  }
  .form-card h3{font-size:19px;font-weight:800;margin-bottom:6px;}
  .form-card .form-tip{font-size:13.5px;color:var(--ink-3);margin-bottom:22px;}
  .form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
  .field{display:block;margin-bottom:16px;}
  .field span{display:block;font-size:13.5px;font-weight:700;color:var(--ink-2);margin-bottom:7px;}
  .field input,.field select,.field textarea{
    width:100%;padding:11px 14px;border-radius:11px;border:1px solid var(--line);
    background:#fbfefd;font-size:14.5px;color:var(--ink);font-family:inherit;
    transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
  }
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none;border-color:var(--mint-400);background:#ffffff;
    box-shadow:0 0 0 3px rgba(24,189,136,.14);
  }
  .field textarea{resize:vertical;min-height:110px;}
  .form-submit{width:100%;margin-top:6px;}
  .form-note{font-size:12.5px;color:var(--ink-3);margin-top:12px;text-align:center;}

  .contact-card{
    background:linear-gradient(165deg,#ffffff 0%,#eafaf3 100%);
    border:1px solid var(--mint-200);border-radius:20px;padding:28px;
    box-shadow:0 16px 36px rgba(13,154,107,.10);
  }
  .contact-card h3{font-size:17px;font-weight:800;margin-bottom:18px;}
  .qr-box{text-align:center;margin-bottom:20px;}
  .qr-box img{
    width:150px;height:auto;border-radius:12px;display:inline-block;
    border:1px solid var(--mint-200);background:#ffffff;padding:6px;
  }
  .qr-box p{font-size:13px;color:var(--ink-3);margin-top:10px;}
  .contact-list{display:flex;flex-direction:column;gap:12px;}
  .contact-list li{display:flex;gap:10px;font-size:13.8px;color:var(--ink-2);align-items:baseline;}
  .contact-list li b{flex:0 0 74px;color:var(--ink-3);font-weight:700;font-size:13px;}
  .contact-list li a{color:var(--mint-700);font-weight:700;word-break:break-all;}

  /* ============ join banner ============ */
  .join-banner{
    margin-top:34px;
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
    padding:30px 32px;border-radius:20px;
    background:linear-gradient(135deg,#0d9a6b,#0a7a55);
    box-shadow:0 20px 44px rgba(10,122,85,.24);
  }
  .join-banner h3{font-size:19px;font-weight:800;color:#ffffff;margin-bottom:6px;}
  .join-banner p{font-size:14px;color:#d5f6e9;max-width:640px;}
  .join-banner .btn{background:#ffffff;color:#0a7a55;box-shadow:none;}
  .join-banner .btn:hover{background:#eafaf3;transform:translateY(-2px);box-shadow:0 10px 22px rgba(0,0,0,.14);}

  /* ============ footer ============ */
  .site-footer{
    background:#0a3a2d;
    color:#cfeade;
    padding:56px 0 0;
  }
  .footer-grid{display:grid;grid-template-columns:1.4fr .8fr 1fr;gap:40px;align-items:start;}
  .footer-logo{width:36px;height:auto;display:block;margin-bottom:16px;}
  .footer-brand p{font-size:13.8px;line-height:1.8;color:#b6dccd;margin-bottom:18px;max-width:360px;}
  .footer-brand .btn-primary{background:linear-gradient(135deg,#2fd9a2,#12b183);color:#04291f;box-shadow:none;}
  .footer-brand .btn-primary:hover{box-shadow:0 12px 26px rgba(0,0,0,.24);}
  .footer-col h3{font-size:14.5px;font-weight:800;color:#ffffff;margin-bottom:16px;letter-spacing:.4px;}
  .footer-col ul{display:flex;flex-direction:column;gap:10px;}
  .footer-col li{font-size:13.5px;color:#b6dccd;line-height:1.6;word-break:break-all;}
  .footer-col a{color:#b6dccd;transition:color .2s ease;}
  .footer-col a:hover{color:#5fe0b6;}
  .footer-links{
    margin-top:40px;padding:20px 0;
    border-top:1px solid rgba(255,255,255,.12);
    display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
    font-size:13px;color:#96c9b6;
  }
  .footer-links strong{font-weight:700;color:#cfeade;}
  .footer-links a{color:#9fe6c9;transition:color .2s ease;}
  .footer-links a:hover{color:#ffffff;}
  .footer-bottom{
    padding:18px 0 24px;
    border-top:1px solid rgba(255,255,255,.12);
    font-size:12.8px;color:#8fbfad;text-align:center;
  }

  /* ============ float tools ============ */
  .float-tools{
    position:fixed;right:20px;bottom:26px;z-index:90;
    display:flex;flex-direction:column;align-items:flex-end;gap:10px;
  }
  .float-btn{
    width:48px;height:48px;border-radius:50%;border:1px solid var(--mint-300);
    background:#ffffff;color:var(--mint-700);cursor:pointer;padding:0;
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 10px 24px rgba(13,154,107,.18);
    transition:transform .22s ease,background .22s ease,box-shadow .22s ease,opacity .22s ease;
  }
  .float-btn svg{width:21px;height:21px;}
  .float-btn:hover{transform:translateY(-3px);background:var(--mint-50);box-shadow:0 14px 28px rgba(13,154,107,.24);}
  #backTop{opacity:0;pointer-events:none;}
  #backTop.show{opacity:1;pointer-events:auto;}
  .kf-card{
    display:none;width:196px;padding:14px;border-radius:16px;
    background:#ffffff;border:1px solid var(--mint-200);
    box-shadow:0 18px 40px rgba(13,154,107,.20);text-align:center;
  }
  .kf-card.show{display:block;animation:fadeUp .3s ease both;}
  .kf-card img{width:150px;height:auto;border-radius:10px;display:block;margin:0 auto;}
  .kf-card p{font-size:12.5px;color:var(--ink-3);margin-top:10px;}

  /* ============ reveal ============ */
  .js-on .reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease;}
  .js-on .reveal.is-visible{opacity:1;transform:none;}

  /* ============ responsive ============ */
  @media (max-width:1080px){
    .nav-toggle{display:flex;}
    .nav-cta{display:none;}
    .brand{margin-right:0;}
    .nav-wrap nav{margin-left:0;flex:0 0 auto;}
    .nav-links{
      position:absolute;top:70px;left:0;right:0;
      flex-direction:column;align-items:stretch;gap:0;
      background:#ffffff;border-bottom:1px solid var(--line);
      padding:8px 24px 18px;display:none;
      box-shadow:0 20px 34px rgba(13,154,107,.10);
    }
    .nav-links.open{display:flex;}
    .nav-links li{width:100%;}
    .nav-links a{padding:12px 6px;border-radius:0;border-bottom:1px solid #eef8f3;font-size:14.5px;}
    .nav-links li:last-child a{border-bottom:none;}
  }
  @media (max-width:980px){
    .hero-inner{grid-template-columns:1fr;gap:38px;}
    .hero{padding:48px 0 60px;}
    .about-grid{grid-template-columns:1fr;gap:30px;}
    .compare-grid{grid-template-columns:1fr;}
    .contact-grid{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
    .grid-4{grid-template-columns:repeat(2,1fr);}
    .step-grid{grid-template-columns:repeat(2,1fr);}
    .net-grid{grid-template-columns:repeat(2,1fr);}
    .ability-grid{grid-template-columns:repeat(2,1fr);}
  }
  @media (max-width:760px){
    .grid-3{grid-template-columns:1fr;}
    .grid-2{grid-template-columns:1fr;}
    .case-grid{grid-template-columns:1fr;}
    .form-row{grid-template-columns:1fr;}
    .join-banner{flex-direction:column;align-items:flex-start;padding:26px 22px;}
    .article-item{flex-wrap:wrap;gap:10px;}
    .article-main{flex:1 1 100%;}
    .article-arrow{display:none;}
  }
  @media (max-width:560px){
    .container{padding:0 18px;}
    .grid-4{grid-template-columns:1fr;}
    .step-grid{grid-template-columns:1fr;}
    .net-grid{grid-template-columns:1fr;}
    .ability-grid{grid-template-columns:1fr;}
    .stat-grid{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr;gap:26px;}
    .hero-points{gap:8px 16px;}
    .float-tools{right:14px;bottom:18px;}
    .float-btn{width:44px;height:44px;}
    .panel-grid span{padding:13px 4px;font-size:12.5px;}
    .form-card,.contact-card{padding:22px 18px;}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
    html{scroll-behavior:auto;}
    .js-on .reveal{opacity:1;transform:none;}
  }