:root{
      --bg:#f4fbf7;
      --bg2:#eef8f1;
      --card:#ffffff;
      --line:#dbe8e0;
      --text:#1f2d28;
      --muted:#62736d;
      --green:#1f9d68;
      --green2:#45b88a;
      --mint:#dff4ea;
      --mint2:#bcead6;
      --shadow:0 14px 40px rgba(24, 70, 47, .08);
      --radius:22px;
      --radius2:16px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(69,184,138,.11), transparent 28%),
        radial-gradient(circle at top right, rgba(31,157,104,.08), transparent 24%),
        linear-gradient(180deg, var(--bg) 0%, #fbfdfb 42%, #f5fbf7 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:60;
      backdrop-filter: blur(14px);
      background: rgba(244,251,247,.82);
      border-bottom:1px solid rgba(219,232,224,.8);
    }
    .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:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;padding:6px;border:1px solid var(--line); box-shadow:0 8px 18px rgba(24,70,47,.06)}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:1.02rem;line-height:1.1}
    .brand-text span{font-size:.86rem;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:.95rem;color:#365046;padding:8px 0;position:relative}
    .nav-links a::after{content:"";position:absolute;left:0;bottom:1px;width:0;height:2px;background:var(--green);transition:.22s}
    .nav-links a:hover::after{width:100%}
    .nav-actions{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:12px 18px; font-weight:700; transition:.22s ease;
      cursor:pointer; line-height:1;
    }
    .btn-primary{background:linear-gradient(135deg,var(--green),var(--green2)); color:#fff; box-shadow:0 12px 24px rgba(31,157,104,.18)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 16px 28px rgba(31,157,104,.23)}
    .btn-ghost{background:#fff; color:#284339; border-color:var(--line)}
    .btn-ghost:hover{transform:translateY(-2px); border-color:#b9dccb; box-shadow:var(--shadow)}
    .menu-btn{
      display:none;border:1px solid var(--line);background:#fff;border-radius:14px;width:46px;height:46px;align-items:center;justify-content:center;cursor:pointer
    }
    .menu-btn span{display:block;width:20px;height:2px;background:#355246;position:relative}
    .menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:#355246}
    .menu-btn span::before{top:-6px}.menu-btn span::after{top:6px}
    .hero{padding:34px 0 16px}
    .hero-grid{
      display:grid; grid-template-columns: 1.12fr .88fr; gap:24px; align-items:stretch;
    }
    .hero-copy{
      padding:34px; border-radius:28px; background:
        linear-gradient(135deg, rgba(255,255,255,.92), rgba(228,247,237,.95));
      border:1px solid rgba(219,232,224,.9); box-shadow:var(--shadow); position:relative; overflow:hidden;
    }
    .hero-copy::before{
      content:""; position:absolute; inset:auto -80px -80px auto; width:240px; height:240px; border-radius:50%;
      background: radial-gradient(circle, rgba(69,184,138,.18), transparent 68%);
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px; border-radius:999px; background:var(--mint); color:#1c6d4b; font-weight:700; font-size:.88rem;
      border:1px solid #cfeedd;
    }
    h1{
      margin:16px 0 12px; font-size:clamp(2rem, 5vw, 3.6rem); line-height:1.08; letter-spacing:-.02em;
    }
    .lead{margin:0; color:var(--muted); font-size:1.05rem; line-height:1.9; max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 18px}
    .hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .pill{padding:10px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#355046;font-size:.92rem}
    .hero-side{display:grid;gap:16px}
    .metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .metric,.surface-card,.service-card,.case-card,.review-card,.article-card,.compare-card,.help-card,.step-card,.info-card,.price-card,.tag-cloud,.timeline-card,.network-card,.contact-card,.faq-card{
      background:var(--card); border:1px solid var(--line); border-radius:var(--radius); box-shadow:0 10px 26px rgba(22,58,39,.05);
    }
    .metric{padding:18px}
    .metric strong{display:block;font-size:1.4rem}
    .metric span{display:block;color:var(--muted);margin-top:6px;font-size:.92rem;line-height:1.5}
    .surface-card{padding:18px}
    .surface-card h3,.section-title h2{margin:0}
    .surface-card p{margin:10px 0 0;color:var(--muted);line-height:1.8}
    .section{padding:20px 0}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-title h2{font-size:clamp(1.4rem, 2.5vw, 2.15rem)}
    .section-title p{margin:0;color:var(--muted);max-width:60ch;line-height:1.8}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service-card,.case-card,.review-card,.article-card,.compare-card,.help-card,.step-card,.info-card,.price-card,.timeline-card,.network-card,.contact-card,.faq-card{padding:20px}
    .service-card h3,.case-card h3,.review-card h3,.article-card h3,.compare-card h3,.help-card h3,.step-card h3,.info-card h3,.price-card h3,.timeline-card h3,.network-card h3,.contact-card h3,.faq-card h3{margin:0 0 10px;font-size:1.06rem}
    .muted{color:var(--muted);line-height:1.8}
    .tag-row{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:#f4fbf7;border:1px solid var(--line);color:#325045;font-size:.9rem}
    .case-media{border-radius:16px;overflow:hidden;border:1px solid var(--line);margin-bottom:14px;background:#f4fbf7}
    .case-media img{width:100%;height:auto;display:block}
    .btn-row{display:flex;flex-wrap:wrap;gap:12px}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .step-num{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--mint),#fff);color:#1a6d4b;font-weight:800;border:1px solid #cfeedd;margin-bottom:12px}
    .table-wrap{overflow-x:auto;border-radius:22px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:15px 16px;border-bottom:1px solid #edf1ed;text-align:left;vertical-align:top}
    th{background:#f4fbf7;color:#214033;font-size:.95rem}
    td{color:#2d3f37;line-height:1.7}
    .score-box{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .score-card{padding:22px;border-radius:24px;background:linear-gradient(135deg,#fff,#edf9f2);border:1px solid var(--line)}
    .rating{font-size:2rem;font-weight:900;color:var(--green)}
    details{
      border-top:1px solid #e5eee8; padding-top:14px; margin-top:14px
    }
    summary{cursor:pointer;font-weight:700;color:#244035;list-style:none}
    summary::-webkit-details-marker{display:none}
    summary::after{content:"＋";float:right;color:var(--green)}
    details[open] summary::after{content:"－"}
    .faq-list .faq-card{padding:18px}
    .faq-list{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .reviews,.articles,.help-grid,.price-grid,.network-grid,.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review-card .role{color:#1f9d68;font-weight:700;font-size:.9rem;margin-bottom:8px}
    .article-card .meta{font-size:.9rem;color:#638074;margin-top:10px}
    .mini-list{margin:0;padding-left:18px;color:#31463d;line-height:1.8}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .timeline-card .time{display:inline-flex;padding:6px 10px;border-radius:999px;background:var(--mint);color:#1f6d4c;font-size:.84rem;font-weight:700;margin-bottom:10px}
    .tags-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .contact-form{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field label{font-weight:700;color:#284339;font-size:.95rem}
    input,select,textarea{
      width:100%;border:1px solid #d8e7de;background:#fff;border-radius:14px;padding:13px 14px;
      color:var(--text);font:inherit;outline:none;transition:.2s;
    }
    textarea{min-height:120px;resize:vertical;grid-column:1/-1}
    input:focus,select:focus,textarea:focus{border-color:#8fd1b3;box-shadow:0 0 0 4px rgba(69,184,138,.12)}
    .form-actions{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:12px;align-items:center}
    footer{
      margin-top:20px;
      background:#e8f6ee; color:#214033; border-top:1px solid #d2e6d8;
    }
    footer a{color:#1f7f58}
    .footer-inner{padding:28px 0}
    .footer-top{display:grid;grid-template-columns:1.2fr .8fr;gap:16px;align-items:start}
    .footer-note{color:#4b6359;line-height:1.8}
    .small{font-size:.92rem;color:#587066}
    .floating{
      position:fixed; right:18px; bottom:18px; z-index:70; display:flex; flex-direction:column; gap:10px;
    }
    .float-btn{
      display:inline-flex;align-items:center;justify-content:center;
      width:48px;height:48px;border-radius:16px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow); color:#295041;
    }
    .float-text{
      width:auto;padding:0 14px; height:48px; border-radius:16px; background:linear-gradient(135deg,var(--green),var(--green2)); color:#fff; border:none;
      font-weight:800;
    }
    .reveal{opacity:0;transform:translateY(14px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.score-box,.footer-top,.grid-3,.grid-4,.steps,.timeline,.reviews,.articles,.help-grid,.price-grid,.network-grid,.contact-grid,.faq-list{grid-template-columns:1fr}
      .nav-links{display:none;position:absolute;left:16px;right:16px;top:74px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:var(--shadow)}
      .nav-links.open{display:flex;flex-direction:column;align-items:flex-start;gap:8px}
      .menu-btn{display:inline-flex}
      .desktop-only{display:none}
      .mobile-only{display:inline-flex}
      .hero-copy{padding:24px}
      .contact-form{grid-template-columns:1fr}
    }