:root{
    /* 色阶取自产品的 keyhub.theme.css，不是设计稿那套 */
    --brand:#7ac143;        /* 公司 logo 那个绿。只做底色，上面放深色字 */
    --primary:#66a336;      /* 图标、次级强调 */
    --green-text:#4d7c29;   /* 绿色文字与链接（白底 4.96，过 AA） */
    --green-soft:#eff7e8;   /* 浅底、图标底 */
    --green-line:#cfe4be;   /* 浅边框 */

    --ink:#111714;
    --ink-2:#27302a;
    --muted:#66716b;
    --line:#e5ebe6;
    --soft:#f5f8f5;
    --dark:#101511;
    --dark-2:#0b0f0c;
    --max:1240px;
  }

  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  @media (prefers-reduced-motion:reduce){ html{scroll-behavior:auto} }
  body{
    margin:0;padding:0;line-height:1.55;background:#fff;color:var(--ink);
    font-family:'Plus Jakarta Sans',-apple-system,'Segoe UI',Arial,sans-serif;
    -webkit-font-smoothing:antialiased;overflow-x:hidden;
  }
  a{color:inherit;text-decoration:none}
  /* height:auto 不能省：img 上写了 width/height 属性防布局抖动，
     只给 max-width 的话宽度被容器压窄、高度还是属性值，图就被压扁了 */
  img{display:block;max-width:100%;height:auto}
  button{font:inherit}
  h1,h2,h3{margin:0;letter-spacing:-.03em;text-wrap:balance}
  h1{font-size:clamp(40px,5.4vw,70px);line-height:1.04;letter-spacing:-.05em;margin:14px 0 20px}
  h2{font-size:clamp(30px,3.6vw,46px);line-height:1.1;letter-spacing:-.04em;margin:0 0 18px}
  h3{font-size:21px;margin:0 0 8px;letter-spacing:-.02em}
  p{margin:0;color:var(--muted);font-size:16px}
  ul{margin:0}

  .container{max-width:var(--max);margin:auto;padding:0 24px}
  .section{padding:clamp(60px,8vw,96px) 0}
  .section.soft{background:var(--soft)}
  .eyebrow{font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.14em;color:var(--green-text)}
  .lead{font-size:19px;max-width:650px;line-height:1.6}
  .intro{max-width:820px;margin-bottom:36px}
  .intro h2{margin-bottom:12px}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border:1px solid transparent;border-radius:8px;padding:12px 20px;
    font-size:15px;font-weight:700;cursor:pointer;transition:background-color .18s,border-color .18s,color .18s;
  }
  /* 品牌绿只做底色配深字：它对白字只有 2.2，连 3:1 都不够 */
  .btn-primary{background:var(--brand);color:#0a1206}
  .btn-primary:hover{background:#8ace56}
  .btn-ghost{background:#fff;border-color:#c3cec6;color:var(--ink)}
  .btn-ghost:hover{border-color:var(--primary);color:var(--green-text)}
  .btn-dark{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.3);color:#fff}
  .btn-dark:hover{background:rgba(255,255,255,.18)}
  .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}

  /* ---------- 顶栏 ---------- */
  .header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
  .nav{height:72px;max-width:var(--max);margin:auto;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 24px}
  .brand{display:flex;align-items:center;background:none;border:0;cursor:pointer;padding:0}
  .brand img{height:26px;width:auto}
  .links{display:flex;gap:26px;align-items:center}
  .links a{border:0;background:none;cursor:pointer;color:#39443e;font-size:14px;font-weight:600;padding:8px 0;border-bottom:2px solid transparent}
  .links a:hover{color:var(--green-text)}
  .links a.active{color:var(--green-text);border-bottom-color:var(--brand)}
  .nav-toggle{display:none;width:40px;height:36px;border-radius:8px;background:none;border:1px solid var(--line);align-items:center;justify-content:center;cursor:pointer}
  .mobile{display:none;position:fixed;inset:72px 0 0 0;z-index:49;background:#fff;padding:8px 24px 32px;overflow:auto}
  .mobile.open{display:block}
  .mobile a{display:block;width:100%;text-align:left;padding:15px 0;border:0;border-bottom:1px solid var(--line);background:none;font-size:17px;font-weight:700;cursor:pointer}

  /* ---------- 页面切换 ---------- */

  /* ---------- hero ---------- */
  .hero{background:radial-gradient(circle at 76% 24%, var(--green-soft) 0, #fff 44%),#fff;padding:clamp(48px,6vw,78px) 0 clamp(56px,7vw,88px)}
  .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
  .hero-art{position:relative}
  .hero-art img{width:100%;border-radius:16px;box-shadow:0 24px 70px rgba(20,35,22,.15)}
  .tag{position:absolute;right:-10px;bottom:20px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 16px;box-shadow:0 12px 35px rgba(0,0,0,.09);font-size:13px;color:var(--muted)}
  .tag b{display:block;font-size:20px;color:var(--ink);letter-spacing:-.02em}

  /* ---------- KPI ---------- */
  .kpis{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-top:46px}
  .kpi{background:#fff;padding:22px}
  .kpi b{display:block;font-size:23px;letter-spacing:-.03em}
  .kpi span{font-size:13px;color:var(--muted)}

  /* ---------- 卡片 ---------- */
  .cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
  .cards.four{grid-template-columns:repeat(4,1fr)}
  .card{border:1px solid var(--line);border-radius:14px;padding:26px;background:#fff;transition:transform .2s,box-shadow .2s}
  .card:hover{transform:translateY(-3px);box-shadow:0 14px 35px rgba(20,35,22,.08)}
  .card p{font-size:15px;line-height:1.6}
  .num{color:var(--green-text);font-weight:800;font-size:13px;letter-spacing:.06em;margin-bottom:18px}
  .icon{width:42px;height:42px;border-radius:10px;background:var(--green-soft);color:var(--green-text);display:grid;place-items:center;font-weight:800;font-size:13px;margin-bottom:18px}

  /* ---------- 左右分栏 ---------- */
  .split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,60px);align-items:center}
  .split img{width:100%;border-radius:14px;border:1px solid var(--line)}
  .bullets{display:grid;gap:14px;margin-top:22px}
  .bullet{display:flex;gap:12px;align-items:flex-start}
  .bullet i{width:8px;height:8px;border-radius:50%;background:var(--brand);margin-top:9px;flex:0 0 8px}
  .bullet b{display:block;color:var(--ink);font-size:15px}
  .bullet p{font-size:14px;line-height:1.55}

  /* ---------- 页头 ---------- */
  .pagehero{padding:clamp(48px,6vw,68px) 0 clamp(38px,5vw,54px);background:var(--soft);border-bottom:1px solid var(--line)}
  .pagehero p{max-width:720px;font-size:17px}
  .crumb{font-size:13px;color:#768179;margin-bottom:20px}
  .crumb span{color:var(--green-text)}

  /* ---------- 生态 ---------- */
  .eco{background:#fff;border:1px solid var(--green-line);border-radius:18px;padding:26px;box-shadow:0 18px 45px rgba(22,50,30,.07)}
  .eco-node{display:flex;gap:16px;align-items:flex-start;padding:18px 16px;border:1px solid var(--line);border-radius:14px}
  .eco-num{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--primary);color:#fff;font-weight:800;font-size:12px;flex:0 0 34px}
  .eco-node strong{display:block;font-size:17px;margin-bottom:5px}
  .eco-node span.d{display:block;color:var(--muted);font-size:13px;line-height:1.55}
  .eco-line{width:2px;height:18px;background:var(--green-line);margin-left:32px}

  /* ---------- 流程 ---------- */
  .flow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;margin-top:46px}
  .step{position:relative;padding-right:22px}
  .step:not(:last-child)::after{content:'→';position:absolute;right:6px;top:8px;color:#b9c5bc;font-size:24px}
  .stepno{width:34px;height:34px;border-radius:50%;background:var(--brand);color:#0a1206;display:grid;place-items:center;font-weight:800;margin-bottom:16px}
  .step h3{font-size:18px}
  .step p{font-size:14px;line-height:1.55}

  /* ---------- 规格表 ---------- */
  .spec{border:1px solid var(--line);border-radius:14px;overflow:hidden;margin-top:26px}
  .specrow{display:grid;grid-template-columns:190px 1fr;border-bottom:1px solid var(--line)}
  .specrow:last-child{border-bottom:0}
  .specrow div{padding:13px 18px;font-size:14px}
  .specrow div:first-child{font-weight:700;background:#f8faf8}

  /* ---------- 产品对比 ---------- */
  .compare{display:grid;grid-template-columns:1fr 1fr;gap:18px}
  .product{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff}
  .product img{width:100%;background:#f7f9f7}
  .productbody{padding:26px}
  .pill{display:inline-block;background:var(--green-soft);color:var(--green-text);border-radius:99px;padding:5px 10px;font-size:12px;font-weight:800;margin-bottom:12px}

  /* ---------- 能力卡 ---------- */
  .features{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
  .feature{border:1px solid var(--line);border-radius:16px;padding:26px;background:#fff;transition:transform .2s,box-shadow .2s}
  .feature:hover{transform:translateY(-3px);box-shadow:0 14px 32px rgba(20,45,25,.08)}
  .feature p{font-size:15px;line-height:1.62;margin-bottom:14px}
  .feature ul{padding-left:18px;color:var(--ink-2);font-size:14px}
  .feature li{margin:8px 0;line-height:1.45}

  /* ---------- 案例 ---------- */
  .cases{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  .case{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 12px 35px rgba(20,45,25,.05);display:flex;flex-direction:column}
  /* 案例头图：还没有实拍照片，用品牌色块 + 图标，不留破图 */
  .case-head{height:150px;display:grid;place-items:center;background:linear-gradient(135deg,var(--green-soft),#e3f0d6)}
  .case-head svg{width:46px;height:46px;color:var(--green-text)}
  .case-body{padding:24px;display:flex;flex-direction:column;flex:1}
  .case-tag{font-size:11px;font-weight:800;letter-spacing:.11em;color:var(--green-text);margin-bottom:8px}
  .case-body h3{font-size:21px;margin-bottom:10px}
  .case-body p{font-size:15px;line-height:1.62}
  .case-points{margin-top:16px;padding-top:16px;border-top:1px solid var(--line);display:grid;gap:8px}
  .case-points div{display:flex;gap:9px;font-size:14px;color:var(--ink-2);line-height:1.45}
  .case-points i{width:6px;height:6px;border-radius:50%;background:var(--brand);margin-top:7px;flex:0 0 6px}

  /* ---------- 行业 ---------- */
  .sectors{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
  .sector{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}
  .sector span{font-size:11px;font-weight:800;color:var(--primary)}
  .sector h3{margin:14px 0 8px;font-size:17px}
  .sector p{font-size:13px;line-height:1.55}

  /* ---------- 深色 CTA ---------- */
  .cta{background:var(--dark);color:#fff;padding:clamp(56px,7vw,72px) 0}
  .cta h2{color:#fff}
  .cta p{color:#aeb9b1}

  /* ---------- 异常处理 ---------- */
  .timeline{border:1px solid var(--line);border-radius:16px;background:#fff;overflow:hidden}
  .tl-row{display:flex;gap:14px;padding:18px 20px;border-bottom:1px solid var(--line)}
  .tl-row:last-child{border-bottom:0}
  .tl-dot{width:26px;height:26px;border-radius:50%;flex:0 0 26px;display:grid;place-items:center;font-size:11px;font-weight:800}
  .tl-warn{background:#fdf0e3;color:#96591b}
  .tl-act{background:var(--green-soft);color:var(--green-text)}
  .tl-row strong{display:block;font-size:15px}
  .tl-row span{font-size:13.5px;color:var(--muted);line-height:1.5}

  /* ---------- 表单 ---------- */
  .form-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(28px,4vw,48px);align-items:start}
  .form-card{border:1px solid var(--line);border-radius:16px;padding:clamp(22px,3vw,30px);background:#fff;box-shadow:0 12px 35px rgba(20,45,25,.05)}
  .fgrid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
  .field{display:flex;flex-direction:column;gap:6px}
  .field.full{grid-column:1/-1}
  .field label{font-size:13px;font-weight:700;color:var(--ink-2)}
  .field label .opt{font-weight:500;color:#8a948d}
  .field input,.field select,.field textarea{
    border:1px solid #d7e0d9;border-radius:8px;padding:11px 13px;
    font-family:inherit;font-size:15px;color:var(--ink);background:#fff;width:100%;
  }
  .field textarea{resize:vertical;min-height:88px}
  .field :is(input,select,textarea):focus{outline:2px solid var(--primary);outline-offset:1px;border-color:var(--primary)}
  .field.bad :is(input,select,textarea){border-color:#c9563f;background:#fef6f4}
  .field .err{font-size:12.5px;color:#a8412c;font-weight:600;display:none}
  .field.bad .err{display:block}
  .form-submit{width:100%;margin-top:20px;padding:14px 20px;font-size:16px}
  .form-submit[disabled]{opacity:.65;cursor:progress}
  .form-note{font-size:12.5px;color:var(--muted);margin-top:12px;text-align:center}
  .form-note.bad{color:#a8412c;font-weight:600}
  .hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
  .done{display:none;border:1px solid var(--green-line);background:var(--green-soft);border-radius:16px;padding:40px 30px;text-align:center}
  .done.on{display:block}
  .done svg{width:44px;height:44px;color:var(--green-text);margin:0 auto 14px}
  .done h3{font-size:22px;margin-bottom:10px}
  .done p{font-size:15px;line-height:1.6}
  .aside-card{border:1px solid var(--line);border-radius:16px;padding:26px;background:var(--soft)}
  .aside-card h3{font-size:19px;margin-bottom:14px}

  /* ---------- 页脚 ---------- */
  .footer{background:var(--dark-2);color:#9da89f;padding:34px 0;font-size:13px}
  .footer .container{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
  .footer b{color:#fff}

  /* ---------- 入场淡入 ---------- */
  /* 默认可见。只有脚本正常跑起来才隐藏等淡入，否则脚本一出问题整页就是白的 */
  .js .rv{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
  .js .rv.in{opacity:1;transform:none}
  @media (prefers-reduced-motion:reduce){.js .rv{opacity:1;transform:none;transition:none}}

  /* ---------- 响应式 ---------- */
  @media(max-width:1000px){
    .kpis{grid-template-columns:repeat(2,1fr)}
    .cards,.cards.four,.features{grid-template-columns:repeat(2,1fr)}
    .cases{grid-template-columns:1fr}
    .sectors{grid-template-columns:repeat(2,1fr)}
    .hero-grid,.split,.compare,.form-wrap{grid-template-columns:1fr}
    .flow{grid-template-columns:1fr;gap:22px}
    .step{padding-right:0}
    .step:not(:last-child)::after{content:'↓';right:auto;left:10px;top:auto;bottom:-22px}
    .tag{right:12px}
  }
  @media(max-width:860px){
    .links{display:none}
    .nav .btn{display:none}
    .nav-toggle{display:flex}
  }
  @media(max-width:620px){
    .cards,.cards.four,.features,.kpis,.sectors,.fgrid{grid-template-columns:1fr}
    .specrow{grid-template-columns:130px 1fr}
  }