:root{
      --bg:#f3fbf7;
      --bg2:#ffffff;
      --card:#ffffff;
      --line:#d8ece4;
      --text:#173127;
      --muted:#5c766b;
      --green:#22b07d;
      --green2:#0f8f66;
      --accent:#b8efe0;
      --shadow:0 14px 36px rgba(19,60,44,.08);
      --shadow2:0 10px 24px rgba(19,60,44,.12);
      --radius:20px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(34,176,125,.11), transparent 28%),
        radial-gradient(circle at top right, rgba(184,239,224,.5), transparent 30%),
        linear-gradient(180deg, #f7fdf9 0%, #f2fbf6 40%, #fbfdfc 100%);
    }
    a{color:var(--green2);text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:saturate(180%) blur(14px);
      background:rgba(247,253,249,.82);
      border-bottom:1px solid rgba(216,236,228,.9);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      padding:14px 0;
    }
    .brand{display:flex; align-items:center; gap:12px; min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:4px}
    .brand h1{font-size:18px;line-height:1.1;margin:0}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .nav-links{display:flex; align-items:center; gap:14px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:14px;color:#28483b;padding:8px 10px;border-radius:999px}
    .nav-links a:hover{background:#e8faf2}
    .nav-cta{display:flex; align-items:center; gap:10px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border:1px solid transparent; border-radius:999px; padding:11px 16px;
      font-weight:700; cursor:pointer; transition:.25s ease; white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--green),#59d3a9); color:#fff; box-shadow:0 10px 24px rgba(34,176,125,.22)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:var(--shadow2)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
    .menu-btn{display:none}
    .hero{padding:34px 0 18px}
    .hero-grid{
      display:grid; grid-template-columns:1.2fr .8fr; gap:22px; align-items:stretch;
    }
    .hero-main,.hero-side,.section-card,.soft-card,.feature-card,.review-card,.case-card,.article-card,.faq-item,.form-card,.compare-card,.timeline-item{
      background:var(--card); border:1px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow);
    }
    .hero-main{padding:34px}
    .eyebrow{display:inline-flex; align-items:center; gap:8px; padding:8px 12px; border-radius:999px; background:#e8faf2; color:#137b57; font-weight:700; font-size:13px}
    .hero h2{font-size:clamp(30px, 4.4vw, 54px); line-height:1.06; margin:16px 0 14px}
    .hero p{color:var(--muted); line-height:1.8; font-size:16px; margin:0}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:24px}
    .hero-points{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:26px}
    .mini{
      padding:14px; border-radius:16px; background:linear-gradient(180deg,#f7fffb,#eefaf5); border:1px solid #dff2ea;
    }
    .mini strong{display:block; font-size:18px; margin-bottom:5px}
    .mini span{color:var(--muted); font-size:13px}
    .hero-side{padding:20px; display:grid; gap:14px}
    .side-top{padding:18px; border-radius:18px; background:linear-gradient(135deg,#effbf6,#ffffff); border:1px solid var(--line)}
    .side-top h3{margin:0 0 8px; font-size:20px}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:8px}
    .tag-cloud span{font-size:13px; padding:8px 10px; border-radius:999px; background:#f3fbf7; border:1px solid var(--line); color:#315545}
    .stats{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    .stat{padding:16px;border-radius:16px;background:#f8fffc;border:1px solid #dff0e8}
    .stat b{display:block;font-size:20px;margin-bottom:6px}
    .stat small{color:var(--muted)}
    section{padding:18px 0}
    .section-head{display:flex; justify-content:space-between; gap:16px; align-items:end; margin-bottom:14px}
    .section-head h3{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:720px;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .feature-card,.review-card,.case-card,.article-card,.compare-card{padding:20px}
    .feature-card h4,.case-card h4,.article-card h4,.review-card h4{margin:0 0 10px;font-size:18px}
    .feature-card p,.review-card p,.case-card p,.article-card p{margin:0;color:var(--muted);line-height:1.75}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
      background:linear-gradient(135deg,#e8faf2,#d7f6ea); color:#0d7f58; font-weight:900;
    }
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline-item{padding:18px}
    .timeline-item b{display:block;font-size:18px;margin-bottom:8px}
    .timeline-item p{margin:0;color:var(--muted);line-height:1.7}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 16px;border-bottom:1px solid #e7f1ec;text-align:left;vertical-align:top}
    th{background:#f4fbf7;color:#204334;font-size:14px}
    td{color:#335143}
    .badge{display:inline-flex;padding:6px 10px;border-radius:999px;background:#e8faf2;color:#0d7f58;font-weight:700;font-size:12px}
    .check{color:#0f8f66;font-weight:700}
    .compare-hero{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    .rating{padding:20px;border-radius:18px;background:linear-gradient(180deg,#f4fbf8,#ffffff);border:1px solid var(--line)}
    .stars{font-size:22px;color:#f2b01e;letter-spacing:2px}
    .faq{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;border:0;background:transparent;color:var(--text);padding:18px 20px;display:flex;align-items:center;justify-content:space-between;font-size:16px;font-weight:700;cursor:pointer;text-align:left}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease;border-top:1px solid transparent}
    .faq-item.open .faq-a{max-height:180px;padding:0 20px 18px;border-top-color:#e7f1ec}
    .faq-a p{margin:14px 0 0;color:var(--muted);line-height:1.75}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .form-card{padding:22px}
    form{display:grid;gap:12px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    input,select,textarea{
      width:100%; border:1px solid var(--line); background:#fbfffd; color:var(--text);
      border-radius:14px; padding:13px 14px; font:inherit; outline:none;
    }
    textarea{min-height:120px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#8edcc1; box-shadow:0 0 0 4px rgba(34,176,125,.08)}
    .footer{
      margin-top:18px; padding:22px 0 26px; background:#effaf5; border-top:1px solid var(--line); color:#214335;
    }
    .footer .links{display:flex; flex-wrap:wrap; gap:10px}
    .footer a{color:#0d7f58}
    .footer-note{margin-top:14px;color:#527165;font-size:13px;line-height:1.7}
    .float{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px;
    }
    .float a,.float button{
      width:52px;height:52px;border-radius:18px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);
      display:grid;place-items:center;color:#0d7f58;cursor:pointer
    }
    .top-btn{display:none}
    .scroll-reveal{opacity:0;transform:translateY(14px);transition:.55s ease}
    .scroll-reveal.show{opacity:1;transform:none}
    .kefu-box{
      display:flex; gap:16px; align-items:center; padding:18px; border-radius:18px; background:#f8fffc; border:1px solid #def1e8;
    }
    .kefu-box img{width:120px;height:120px;object-fit:cover;border-radius:16px;border:1px solid var(--line);background:#fff}
    .article-list{display:grid;gap:12px}
    .article-row{
      display:flex; justify-content:space-between; gap:12px; align-items:center; padding:14px 16px;
      border-radius:14px; border:1px solid #e1efe8; background:#fbfffd;
    }
    .article-row span{color:var(--muted);font-size:13px}
    .service-net{display:flex;flex-wrap:wrap;gap:10px}
    .service-net a{padding:10px 12px;border:1px solid var(--line);border-radius:999px;background:#fff;color:#275143}
    @media (max-width: 980px){
      .hero-grid,.compare-hero,.split,.grid-4,.grid-3,.timeline{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .nav.open .nav-links{
        display:flex; position:absolute; left:16px; right:16px; top:66px; padding:14px; border-radius:18px;
        background:#fff; border:1px solid var(--line); box-shadow:var(--shadow); flex-direction:column; align-items:flex-start;
      }
      .nav.open .nav-cta{display:flex; position:absolute; right:16px; top:66px; transform:translateY(248px); background:#fff; padding:14px; border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow)}
      .hero-main{padding:24px}
      .hero-points{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container), calc(100% - 24px))}
      .section-head{flex-direction:column;align-items:flex-start}
      .hero h2{font-size:30px}
      .kefu-box{flex-direction:column;align-items:flex-start}
      .float{right:12px;bottom:12px}
      .float a,.float button{width:48px;height:48px}
    }