:root{
    --ink:#161226;
    --ink-2:#4b4761;
    --ink-3:#7b7690;
    --paper:#fffdf7;
    --line:#e9e2f5;
    --c1:#e6301f;
    --c2:#3a1fd6;
    --c3:#ffc63d;
    --c4:#0d8f7e;
    --shadow:0 10px 30px rgba(58,31,214,.10);
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    color:var(--ink);
    line-height:1.7;
    background:
      radial-gradient(1100px 520px at 92% -8%, #ffe6df 0%, rgba(255,230,223,0) 62%),
      radial-gradient(900px 480px at -6% 6%, #ebe4ff 0%, rgba(235,228,255,0) 58%),
      radial-gradient(800px 600px at 50% 120%, #fff3d6 0%, rgba(255,243,214,0) 60%),
      var(--paper);
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;}
  a{color:var(--c2);}
  h1,h2,h3,h4{letter-spacing:-.01em;line-height:1.28;}
  .container{width:100%;max-width:1160px;margin:0 auto;padding:0 20px;}
  section{scroll-margin-top:86px;}

  /* ---------- 导航 ---------- */
  .nav{
    position:sticky;top:0;z-index:80;
    background:rgba(255,253,247,.94);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
  }
  .nav-inner{
    display:flex;align-items:center;gap:18px;
    min-height:68px;position:relative;
  }
  .brand{
    display:flex;align-items:center;gap:10px;
    margin-right:auto;text-decoration:none;color:var(--ink);
  }
  .brand .ai-page-logo{width:auto;max-width:112px;height:auto;display:block;}
  .brand-name{font-weight:900;font-size:17px;letter-spacing:.02em;white-space:nowrap;}
  .nav-links{
    display:flex;align-items:center;gap:0;
    list-style:none;margin:0;padding:0;
  }
  .nav-links a{
    display:block;padding:9px 11px;border-radius:10px;
    font-size:14.5px;font-weight:600;color:var(--ink-2);
    text-decoration:none;transition:color .18s ease,background .18s ease;
  }
  .nav-links a:hover{color:var(--c2);background:#f2ecff;}
  .nav-toggle{
    display:none;flex-direction:column;justify-content:center;gap:4px;
    width:42px;height:42px;border-radius:12px;border:1.5px solid var(--line);
    background:#fff;cursor:pointer;padding:0 10px;
  }
  .nav-toggle .bar{display:block;height:2px;width:100%;background:var(--ink);border-radius:2px;}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:13px 24px;border-radius:14px;border:2px solid transparent;
    font-size:15px;font-weight:800;text-decoration:none;cursor:pointer;
    font-family:inherit;line-height:1.2;
    transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease;
  }
  .btn:active{transform:translateY(1px);}
  .btn-primary{background:var(--c2);color:#fff;box-shadow:0 12px 26px rgba(58,31,214,.28);}
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(58,31,214,.34);}
  .btn-accent{background:var(--c1);color:#fff;box-shadow:0 12px 26px rgba(230,48,31,.26);}
  .btn-accent:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(230,48,31,.32);}
  .btn-ghost{background:#fff;color:var(--ink);border-color:var(--ink);}
  .btn-ghost:hover{background:var(--c3);border-color:var(--c3);}
  .nav-cta{padding:11px 20px;border-radius:12px;font-size:14.5px;}

  /* ---------- 首屏 ---------- */
  .hero{position:relative;padding:64px 0 48px;overflow:hidden;isolation:isolate;}
  .hero::before{
    content:"";position:absolute;top:-180px;right:-140px;width:460px;height:460px;border-radius:50%;
    background:radial-gradient(circle,#ffd3c8 0%,rgba(255,211,200,0) 70%);z-index:0;
  }
  .hero::after{
    content:"";position:absolute;bottom:-160px;left:-120px;width:400px;height:400px;border-radius:50%;
    background:radial-gradient(circle,#ddd2ff 0%,rgba(221,210,255,0) 70%);z-index:0;
  }
  .hero-inner{
    position:relative;z-index:1;
    display:grid;grid-template-columns:1.12fr .88fr;gap:38px;align-items:center;
  }
  .eyebrow{
    display:inline-block;margin:0 0 16px;padding:6px 14px;border-radius:999px;
    background:#fff;border:1.5px solid var(--c1);color:var(--c1);
    font-size:12.5px;font-weight:800;letter-spacing:.05em;
  }
  .hero h1{
    margin:0 0 16px;font-size:clamp(30px,4.8vw,54px);font-weight:900;line-height:1.14;
  }
  .hero-lead{margin:0;font-size:16px;color:var(--ink-2);max-width:620px;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 16px;}
  .hero-note{margin:0;font-size:13.5px;color:var(--ink-3);}
  .hero-tiles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
  .tile{
    border-radius:18px;padding:20px 16px;min-height:108px;
    display:flex;flex-direction:column;justify-content:flex-end;
    box-shadow:0 14px 28px rgba(22,18,38,.14);
  }
  .tile span{display:block;font-size:17px;font-weight:900;}
  .tile em{display:block;font-style:normal;font-size:12.5px;margin-top:4px;opacity:.92;}
  .t1{background:#e6301f;color:#fff;}
  .t2{background:#3a1fd6;color:#fff;}
  .t3{background:#ffc63d;color:#221a00;}
  .t4{background:#0d8f7e;color:#ffffff;}
  @keyframes floaty{
    0%,100%{transform:translateY(0);}
    50%{transform:translateY(-7px);}
  }
  .tile:nth-child(1){animation:floaty 7s ease-in-out infinite;}
  .tile:nth-child(4){animation:floaty 7s ease-in-out infinite 1.4s;}
  .metrics{
    position:relative;z-index:1;
    list-style:none;margin:36px 0 0;padding:18px 20px;
    display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;
    background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);
  }
  .metrics li{padding-left:14px;border-left:3px solid var(--c2);}
  .metrics li:nth-child(1){border-color:var(--c1);}
  .metrics li:nth-child(2){border-color:var(--c2);}
  .metrics li:nth-child(3){border-color:var(--c3);}
  .metrics li:nth-child(4){border-color:var(--c4);}
  .metrics strong{display:block;font-size:23px;font-weight:900;letter-spacing:-.02em;}
  .metrics span{display:block;font-size:13px;color:var(--ink-2);}

  /* ---------- 通用区块 ---------- */
  .section{padding:76px 0;}
  .section-head{max-width:760px;margin-bottom:34px;}
  .tag{
    display:inline-block;margin:0 0 12px;padding:5px 14px;border-radius:999px;
    background:#fff;border:1.5px solid var(--c2);color:var(--c2);
    font-size:12.5px;font-weight:800;letter-spacing:.06em;
  }
  .section-head h2{margin:0 0 12px;font-size:clamp(23px,3.2vw,34px);font-weight:900;}
  .section-desc{margin:0;font-size:15.5px;color:var(--ink-2);}
  .grid{display:grid;gap:18px;}
  .grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid-3{grid-template-columns:repeat(3,minmax(0,1fr));}
  .card{
    background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;
    box-shadow:0 6px 18px rgba(22,18,38,.05);
    transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  }
  .card:hover{transform:translateY(-4px);box-shadow:0 18px 36px rgba(58,31,214,.14);border-color:#d8ccff;}
  .card h3{margin:0 0 8px;font-size:17px;font-weight:800;}
  .card p{margin:0;font-size:14.5px;color:var(--ink-2);}
  .about-mark{
    display:block;width:34px;height:34px;border-radius:11px;margin-bottom:14px;
    background:linear-gradient(135deg,var(--c1),var(--c3));
  }
  .grid-3 > .card:nth-child(3n+1) .about-mark{background:linear-gradient(135deg,#e6301f,#ffc63d);}
  .grid-3 > .card:nth-child(3n+2) .about-mark{background:linear-gradient(135deg,#3a1fd6,#00b9a3);}
  .grid-3 > .card:nth-child(3n+3) .about-mark{background:linear-gradient(135deg,#0d8f7e,#ffc63d);}

  /* ---------- 场景卡片 ---------- */
  .scene-card{position:relative;padding-left:24px;overflow:hidden;}
  .scene-card::before{
    content:"";position:absolute;left:0;top:20px;bottom:20px;width:5px;border-radius:4px;background:var(--c2);
  }
  .grid-3 > .scene-card:nth-child(4n+1)::before{background:var(--c1);}
  .grid-3 > .scene-card:nth-child(4n+2)::before{background:var(--c2);}
  .grid-3 > .scene-card:nth-child(4n+3)::before{background:var(--c3);}
  .grid-3 > .scene-card:nth-child(4n+4)::before{background:var(--c4);}

  .models-box{
    margin-top:26px;background:#fff;border:1px solid var(--line);border-radius:20px;
    padding:24px;box-shadow:var(--shadow);
  }
  .models-box h3{margin:0 0 6px;font-size:18px;}
  .models-box p{margin:0 0 16px;font-size:14px;color:var(--ink-2);}
  .chips{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;}
  .chips li{
    padding:6px 12px;border-radius:999px;background:#f5f1ff;border:1px solid #e2d9ff;
    color:#2c1a86;font-size:13px;font-weight:600;
  }
  .chips li:nth-child(3n+2){background:#fff0ec;border-color:#ffd9d0;color:#a02312;}
  .chips li:nth-child(3n+3){background:#fff8e0;border-color:#ffe9a8;color:#7a5600;}

  /* ---------- 流程 ---------- */
  .steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;}
  .steps li{
    background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px 18px;
    box-shadow:0 6px 18px rgba(22,18,38,.05);
    transition:transform .22s ease,box-shadow .22s ease;
  }
  .steps li:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(58,31,214,.13);}
  .step-no{
    display:inline-block;padding:2px 10px;border-radius:999px;margin-bottom:10px;
    background:#efe9ff;color:var(--c2);font-size:12.5px;font-weight:900;
  }
  .steps h3{margin:0 0 6px;font-size:16px;}
  .steps p{margin:0;font-size:13.5px;color:var(--ink-2);}

  /* ---------- 行业 ---------- */
  .network-band{
    margin-top:22px;padding:22px 24px;border-radius:18px;
    background:linear-gradient(120deg,#2b168f,#3a1fd6 55%,#5b3bff);
    color:#fff;display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center;
    box-shadow:0 16px 34px rgba(58,31,214,.24);
  }
  .network-band h3{margin:0 0 4px;font-size:17px;color:#fff;}
  .network-band p{margin:0;font-size:14px;color:#e8e3ff;}
  .network-band .chips li{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.28);color:#fff;}

  /* ---------- 案例 ---------- */
  .case-card{padding:0;overflow:hidden;}
  .case-media{background:#f1ecff;overflow:hidden;}
  .case-media img{display:block;width:100%;height:auto;}
  .case-body{padding:16px 18px 20px;}
  .case-body h3{margin:0 0 6px;font-size:16px;}
  .case-body p{margin:0;font-size:13.5px;color:var(--ink-2);}

  /* ---------- 对比评测 ---------- */
  .score-row{
    display:grid;grid-template-columns:.65fr .65fr 1.7fr;gap:16px;align-items:stretch;margin-bottom:22px;
  }
  .score-main{
    background:#fff;border:2px solid var(--c2);border-radius:18px;padding:20px;
    text-align:center;box-shadow:0 14px 30px rgba(58,31,214,.14);
  }
  .score-label{margin:0 0 6px;font-size:13px;font-weight:700;color:var(--ink-2);}
  .score-stars{margin:0;font-size:24px;letter-spacing:3px;color:#ef7b00;}
  .score-num{margin:0;font-size:34px;font-weight:900;color:var(--c1);line-height:1.1;}
  .score-num span{font-size:15px;color:var(--ink-3);font-weight:700;margin-left:2px;}
  .score-text{margin:6px 0 0;font-size:13px;font-weight:700;color:var(--ink-2);}
  .score-desc{
    background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;
    display:flex;align-items:center;box-shadow:0 6px 18px rgba(22,18,38,.05);
  }
  .score-desc p{margin:0;font-size:14.5px;color:var(--ink-2);}
  .table-scroll{
    overflow-x:auto;-webkit-overflow-scrolling:touch;
    background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 6px 18px rgba(22,18,38,.05);
  }
  table{border-collapse:collapse;width:100%;min-width:720px;font-size:14.5px;}
  th,td{padding:13px 16px;text-align:left;border-bottom:1px solid #f1ecfb;vertical-align:top;}
  thead th{background:#f5f1ff;color:#2a1d6b;font-weight:800;font-size:14px;}
  tbody tr:last-child td{border-bottom:none;}
  tbody td:first-child{font-weight:700;color:var(--ink);}
  tbody td:nth-child(2){color:var(--c2);font-weight:700;}
  tbody tr:hover{background:#fdfbff;}

  /* ---------- Token ---------- */
  .token-note{
    margin-top:20px;padding:16px 20px;border-radius:14px;
    background:#fff7e3;border:1px dashed #f0c65a;color:#6b4b00;font-size:14px;
  }
  .token-actions{margin-top:20px;display:flex;flex-wrap:wrap;gap:12px;}

  /* ---------- 评论 ---------- */
  .review-card{display:flex;flex-direction:column;gap:12px;}
  .review-top{display:flex;align-items:center;gap:12px;}
  .avatar{
    width:42px;height:42px;border-radius:12px;flex:0 0 auto;
    display:flex;align-items:center;justify-content:center;
    font-weight:900;font-size:16px;color:#fff;background:var(--c2);
  }
  .grid-3 > .review-card:nth-child(3n+1) .avatar{background:var(--c1);}
  .grid-3 > .review-card:nth-child(3n+2) .avatar{background:var(--c2);}
  .grid-3 > .review-card:nth-child(3n+3) .avatar{background:var(--c4);}
  .review-name{font-size:15px;font-weight:800;margin:0;line-height:1.3;}
  .review-role{font-size:12.5px;color:var(--ink-3);margin:0;}
  .review-card p.review-text{margin:0;font-size:14.5px;color:var(--ink-2);}

  /* ---------- 帮助中心 ---------- */
  .help-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
  .help-list,.news-list{list-style:none;margin:0;padding:0;display:grid;gap:12px;}
  .help-list li{font-size:14px;color:var(--ink-2);}
  .help-list strong{display:block;color:var(--ink);font-size:14.5px;margin-bottom:2px;}
  .news-list li{font-size:14.5px;padding-bottom:10px;border-bottom:1px dashed #ece5f8;}
  .news-list li:last-child{border-bottom:none;padding-bottom:0;}
  .news-list a{color:#2c1a86;text-decoration:none;font-weight:600;}
  .news-list a:hover{color:var(--c1);text-decoration:underline;}
  .wiki-box{margin-top:18px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 6px 18px rgba(22,18,38,.05);}
  .wiki-box h3{margin:0 0 12px;font-size:17px;}

  /* ---------- 表单与联系 ---------- */
  .contact-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:20px;align-items:start;}
  .lead-form{
    background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px;
    display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;
    box-shadow:var(--shadow);
  }
  .field{display:flex;flex-direction:column;gap:6px;min-width:0;}
  .field-full{grid-column:1/-1;}
  .field label{font-size:13.5px;font-weight:700;color:var(--ink-2);}
  .field input,.field select,.field textarea{
    width:100%;padding:12px 14px;border-radius:12px;border:1.5px solid #e2dbf2;
    background:#fdfbff;color:var(--ink);font-size:14.5px;font-family:inherit;
    transition:border-color .18s ease,box-shadow .18s ease;
  }
  .field textarea{resize:vertical;min-height:112px;}
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none;border-color:var(--c2);box-shadow:0 0 0 3px rgba(58,31,214,.12);
  }
  .lead-form .btn{grid-column:1/-1;width:100%;}
  .contact-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px;box-shadow:var(--shadow);}
  .contact-card h3{margin:0 0 14px;font-size:17px;}
  .contact-list{list-style:none;margin:0 0 18px;padding:0;display:grid;gap:11px;}
  .contact-list li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);flex-wrap:wrap;}
  .contact-list strong{color:var(--ink);font-weight:800;min-width:78px;}
  .contact-list a{color:var(--c2);text-decoration:none;font-weight:700;}
  .contact-list a:hover{text-decoration:underline;}
  .qr{display:flex;align-items:center;gap:14px;padding:12px;border-radius:14px;background:#f7f2ff;border:1px dashed #d3c6ff;}
  .qr img{display:block;width:104px;height:auto;border-radius:8px;background:#fff;}
  .qr p{margin:0;font-size:13px;color:var(--ink-2);}

  .agent-band{
    margin-top:22px;border-radius:20px;padding:26px 24px;
    background:linear-gradient(110deg,#e6301f,#ff7a3d 48%,#ffc63d);
    color:#26100a;display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center;
    box-shadow:0 18px 36px rgba(230,48,31,.22);
  }
  .agent-band h3{margin:0 0 6px;font-size:19px;color:#26100a;}
  .agent-band p{margin:0;font-size:14.5px;color:#3a1a10;}
  .agent-band .btn{background:#26100a;color:#fff;border-color:#26100a;box-shadow:none;}
  .agent-band .btn:hover{background:#3d1a0f;}

  /* ---------- FAQ ---------- */
  .faq-list{display:grid;gap:12px;}
  .faq-item{
    background:#fff;border:1px solid var(--line);border-radius:14px;
    padding:4px 18px;box-shadow:0 4px 14px rgba(22,18,38,.04);
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .faq-item[open]{border-color:#cdbfff;box-shadow:0 12px 26px rgba(58,31,214,.12);}
  .faq-item summary{
    cursor:pointer;list-style:none;padding:14px 0;font-size:15px;font-weight:800;color:var(--ink);
    display:flex;align-items:center;justify-content:space-between;gap:14px;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{
    content:"+";flex:0 0 auto;width:24px;height:24px;border-radius:8px;
    display:flex;align-items:center;justify-content:center;
    background:#f2ecff;color:var(--c2);font-weight:900;font-size:16px;
    transition:transform .22s ease,background .22s ease;
  }
  .faq-item[open] summary::after{content:"−";background:var(--c2);color:#fff;transform:rotate(180deg);}
  .faq-item p{margin:0 0 16px;font-size:14.5px;color:var(--ink-2);}

  /* ---------- 页脚 ---------- */
  .site-footer{
    background:#f4eeff;border-top:3px solid var(--c1);
    color:var(--ink);padding:40px 0 22px;margin-top:0;
  }
  .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.2fr;gap:28px;}
  .footer-brand{display:flex;flex-direction:column;gap:10px;}
  .footer-brand .brand{margin:0;}
  .footer-brand p{margin:0;font-size:14px;color:#4b4761;max-width:340px;}
  .site-footer h3{margin:0 0 12px;font-size:15px;color:var(--ink);}
  .site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px;}
  .site-footer a{color:#3a1fd6;text-decoration:none;font-size:14px;}
  .site-footer a:hover{text-decoration:underline;}
  .footer-bottom{
    border-top:1px solid #e0d5ff;margin-top:24px;padding-top:16px;
    font-size:13px;color:#4b4761;display:flex;flex-wrap:wrap;gap:8px 18px;
  }
  .footer-bottom p{margin:0;}

  /* ---------- 浮动工具 ---------- */
  .float-tools{position:fixed;right:16px;bottom:18px;display:flex;flex-direction:column;gap:10px;z-index:70;}
  .float-btn{
    width:52px;height:52px;border-radius:16px;display:flex;align-items:center;justify-content:center;
    font-size:13px;font-weight:900;text-decoration:none;border:none;cursor:pointer;
    box-shadow:0 12px 26px rgba(22,18,38,.18);
    transition:transform .2s ease,box-shadow .2s ease,opacity .2s ease;
  }
  .float-btn:hover{transform:translateY(-2px);}
  .float-service{background:var(--c2);color:#fff;}
  .float-top{background:#fff;color:var(--ink);border:1.5px solid var(--line);font-size:18px;opacity:0;visibility:hidden;transform:translateY(10px);}
  .float-top.is-show{opacity:1;visibility:visible;transform:none;}

  /* ---------- 动效 ---------- */
  @keyframes riseIn{
    from{opacity:0;transform:translateY(18px);}
    to{opacity:1;transform:translateY(0);}
  }
  .reveal.is-visible{animation:riseIn .6s ease both;}

  /* ---------- 响应式 ---------- */
  @media (max-width:1023px){
    .nav-toggle{display:flex;}
    .nav-links{
      position:absolute;top:100%;left:0;right:0;
      flex-direction:column;align-items:stretch;gap:0;
      background:#fff;border-bottom:1px solid var(--line);
      padding:10px 16px 18px;display:none;
      box-shadow:0 20px 32px rgba(22,18,38,.12);
    }
    .nav-links.is-open{display:flex;}
    .nav-links a{padding:13px 8px;border-radius:8px;font-size:15px;}
    .nav-cta{display:none;}
    .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
    .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
    .footer-grid{grid-template-columns:1fr 1fr;}
  }
  @media (max-width:900px){
    .hero-inner{grid-template-columns:minmax(0,1fr);gap:28px;}
    .hero{padding:44px 0 36px;}
    .contact-grid{grid-template-columns:minmax(0,1fr);}
    .help-grid{grid-template-columns:minmax(0,1fr);}
    .score-row{grid-template-columns:1fr 1fr;}
    .score-desc{grid-column:1/-1;}
    .network-band{grid-template-columns:1fr;}
    .agent-band{grid-template-columns:1fr;}
    .section{padding:56px 0;}
  }
  @media (max-width:620px){
    .grid-2,.grid-3{grid-template-columns:minmax(0,1fr);}
    .steps{grid-template-columns:minmax(0,1fr);}
    .metrics{grid-template-columns:1fr 1fr;}
    .lead-form{grid-template-columns:minmax(0,1fr);padding:20px;}
    .footer-grid{grid-template-columns:minmax(0,1fr);}
    .score-row{grid-template-columns:minmax(0,1fr);}
    .hero-actions .btn{width:100%;}
    .brand-name{font-size:16px;}
    .float-btn{width:48px;height:48px;}
  }
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto;}
    .reveal.is-visible{animation:none;}
    .tile:nth-child(1),.tile:nth-child(4){animation:none;}
    .card:hover,.steps li:hover,.btn:hover{transform:none;}
  }