:root{
      --bg:#f6f8ff; --bg2:#fff8f2; --card:#ffffff; --text:#182033; --muted:#5f6b85;
      --line:#d9e2f2; --primary:#ff4d6d; --primary2:#2f6bff; --accent:#16c7b0; --warm:#ffb703;
      --shadow:0 18px 50px rgba(34,52,99,.10); --radius:20px; --radius2:28px; --max:1180px;
    }
    *{box-sizing:border-box} html{scroll-behavior:smooth}
    body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);background:
      radial-gradient(circle at 10% 10%, rgba(255,77,109,.10), transparent 28%),
      radial-gradient(circle at 90% 0%, rgba(47,107,255,.10), transparent 24%),
      linear-gradient(180deg, var(--bg) 0%, #fbfcff 45%, var(--bg2) 100%);}
    a{color:inherit;text-decoration:none} img{display:block;max-width:100%}
    .container{width:min(100% - 32px, var(--max));margin-inline:auto}
    .topbar{position:sticky;top:0;z-index:30;background:rgba(246,248,255,.78);backdrop-filter:blur(16px);border-bottom:1px solid rgba(217,226,242,.7)}
    .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 img{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:6px;box-shadow:0 10px 20px rgba(0,0,0,.06)}
    .brand h1,.brand .site-name{margin:0;font-size:18px;font-weight:800;white-space:nowrap}
    .brand small{display:block;color:var(--muted);font-size:12px;margin-top:2px}
    .navlinks{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:flex-end}
    .navlinks a{font-size:13px;padding:9px 12px;border:1px solid transparent;border-radius:999px;color:#24304a;background:rgba(255,255,255,.55)}
    .navlinks a:hover{border-color:var(--line);box-shadow:0 8px 18px rgba(47,107,255,.10);transform:translateY(-1px)}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .hero{padding:36px 0 14px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.soft-card,.review-card,.faq-item,.case-card,.price-card,.article-card,.contact-card,.compare-card,.timeline,.network-card{background:var(--card);border:1px solid rgba(217,226,242,.9);box-shadow:var(--shadow);border-radius:var(--radius2)}
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main:before{content:"";position:absolute;inset:auto -80px -80px auto;width:240px;height:240px;border-radius:50%;background:radial-gradient(circle, rgba(255,77,109,.16), transparent 65%);}
    .pill{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:linear-gradient(135deg, rgba(255,77,109,.12), rgba(47,107,255,.12));color:#1f2b4a;font-weight:700;font-size:13px}
    .hero h2{margin:16px 0 12px;font-size:clamp(30px,5vw,52px);line-height:1.08;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:64ch}
    .cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 18px;border-radius:14px;font-weight:800;border:1px solid transparent;transition:.25s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--primary),#ff8a5b);color:#fff;box-shadow:0 14px 26px rgba(255,77,109,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px)}
    .hero-side{padding:22px}
    .metric{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .metric .box{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff, #f8fbff);border:1px solid var(--line)}
    .metric .n{font-size:24px;font-weight:900}
    .metric .t{font-size:12px;color:var(--muted);margin-top:4px}
    .hero-list{margin:16px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .hero-list li{padding:11px 12px;border-radius:14px;background:#f8fbff;border:1px solid var(--line);color:#22304a;font-size:14px}
    section{padding:16px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}
    .section-head h3{margin:0;font-size:26px}
    .section-head p{margin:0;color:var(--muted)}
    .grid-3,.grid-4{display:grid;gap:14px}
    .grid-3{grid-template-columns:repeat(3,1fr)} .grid-4{grid-template-columns:repeat(4,1fr)}
    .soft-card,.section-card,.case-card,.article-card,.review-card,.faq-item,.price-card,.contact-card,.compare-card,.network-card{padding:20px}
    .soft-card h4,.section-card h4,.case-card h4,.article-card h4,.review-card h4,.price-card h4,.network-card h4{margin:0 0 10px;font-size:18px}
    .soft-card p,.section-card p,.case-card p,.article-card p,.review-card p,.price-card p,.network-card p{margin:0;color:var(--muted);line-height:1.75}
    .icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg, rgba(47,107,255,.12), rgba(22,199,176,.12));margin-bottom:12px;font-size:20px}
    .chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
    .chip{padding:7px 10px;border-radius:999px;background:#f4f7ff;border:1px solid var(--line);font-size:12px;color:#31415e}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;min-width:760px;background:#fff}
    th,td{padding:14px 12px;border-bottom:1px solid #edf1f7;text-align:left;vertical-align:top}
    th{background:#f7f9ff;color:#20304a;font-size:14px}
    td{color:#33425f;font-size:14px;line-height:1.6}
    .highlight{color:var(--primary);font-weight:800}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff, #f8fbff);border:1px solid var(--line);position:relative}
    .step b{display:inline-flex;width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,var(--primary2),var(--accent));color:#fff;align-items:center;justify-content:center;margin-bottom:12px}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .stars{color:#ffb703;font-size:18px;letter-spacing:1px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{width:100%;text-align:left;background:none;border:none;padding:18px 20px;font-size:16px;font-weight:800;color:var(--text);display:flex;align-items:center;justify-content:space-between;gap:12px;cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 20px;color:var(--muted);line-height:1.8}
    .faq-item.open .faq-a{max-height:180px;padding-bottom:18px}
    .faq-item.open .faq-q span{transform:rotate(45deg)}
    .faq-q span{transition:.2s}
    .article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .article-card a{display:inline-block;margin-top:10px;color:var(--primary2);font-weight:700}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    label{display:block;font-size:13px;font-weight:700;color:#34445f;margin-bottom:6px}
    input,select,textarea{width:100%;border:1px solid var(--line);border-radius:14px;padding:12px 14px;font:inherit;background:#fff;color:var(--text);outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(47,107,255,.55);box-shadow:0 0 0 4px rgba(47,107,255,.08)}
    .full{grid-column:1/-1}
    .footer{padding:22px 0 36px;color:#24304a}
    .footer-inner{padding:22px;border-radius:24px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
    .footer-top{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 11px;border-radius:999px;background:#f4f7ff;border:1px solid var(--line);font-size:13px}
    .float-box{position:fixed;right:16px;bottom:16px;z-index:40;display:flex;flex-direction:column;gap:10px}
    .float-btn{width:48px;height:48px;border-radius:16px;background:linear-gradient(135deg,var(--primary),#ff8a5b);color:#fff;display:grid;place-items:center;box-shadow:0 12px 28px rgba(255,77,109,.24);border:none;cursor:pointer}
    .float-panel{position:fixed;right:16px;bottom:74px;z-index:39;width:min(320px, calc(100vw - 32px));background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:20px;padding:16px;display:none}
    .float-panel.open{display:block}
    .fade-in{opacity:0;transform:translateY(18px);transition:.65s ease}
    .fade-in.in{opacity:1;transform:none}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:8px 11px;border-radius:999px;background:linear-gradient(135deg,#fff, #f2f6ff);border:1px solid var(--line);font-size:13px}
    .mini-muted{font-size:13px;color:var(--muted)}
    .section-card ul{margin:10px 0 0;padding-left:18px;color:var(--muted);line-height:1.8}
    .case-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .timeline{padding:20px}
    .timeline ul{margin:0;padding:0;list-style:none;display:grid;gap:12px}
    .timeline li{display:flex;gap:12px;align-items:flex-start;color:#31415e}
    .dot{width:12px;height:12px;border-radius:50%;margin-top:6px;background:linear-gradient(135deg,var(--primary2),var(--accent));flex:0 0 auto}
    .compare-card .rating{display:flex;align-items:center;gap:12px;margin-top:8px}
    .rating .num{font-size:34px;font-weight:900;color:var(--primary2)}
    .service-net{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.steps,.reviews,.service-net,.footer-top{grid-template-columns:1fr}
      .grid-3,.case-list,.article-list{grid-template-columns:repeat(2,1fr)}
      .navlinks{display:none}
      .menu-btn{display:inline-flex}
      .nav.open .navlinks{display:flex;position:absolute;left:16px;right:16px;top:66px;flex-direction:column;align-items:stretch;padding:12px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
    }
    @media (max-width: 680px){
      .grid-3,.case-list,.article-list,.form-grid{grid-template-columns:1fr}
      .hero-main{padding:22px}
      .section-head{flex-direction:column;align-items:flex-start}
      .metric{grid-template-columns:1fr 1fr}
      .container{width:min(100% - 24px, var(--max))}
      .nav{position:relative}
    }