:root{
      --bg:#f4f7fb;
      --bg2:#edf3ff;
      --card:#ffffff;
      --line:#d9e2f2;
      --text:#17304d;
      --muted:#5b6f86;
      --blue:#1357d6;
      --blue2:#2f7bff;
      --blue3:#0b2f7a;
      --gold:#f5b84b;
      --shadow:0 18px 50px rgba(15,44,92,.12);
      --radius:20px;
      --radius-sm:14px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(47,123,255,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(245,184,75,.10), transparent 24%),
        linear-gradient(180deg,#f8fbff 0%, #f4f7fb 48%, #eff4fb 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:50;
      backdrop-filter: blur(14px);
      background:rgba(244,247,251,.82);
      border-bottom:1px solid rgba(217,226,242,.75);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      min-height:72px;
    }
    .brand{display:flex; align-items:center; gap:12px; min-width:0}
    .brand img{width:42px; height:42px; object-fit:contain; border-radius:10px; background:#fff; box-shadow:0 6px 18px rgba(16,52,113,.08)}
    .brand strong{display:block; font-size:16px; line-height:1.1}
    .brand span{display:block; font-size:12px; color:var(--muted); margin-top:3px}
    .menu-toggle{
      display:none; border:1px solid var(--line); background:#fff; color:var(--text);
      border-radius:12px; width:44px; height:44px; align-items:center; justify-content:center;
      box-shadow:0 8px 20px rgba(17,42,88,.06)
    }
    .nav-links{display:flex; align-items:center; gap:18px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:14px; color:var(--muted); padding:8px 0; position:relative}
    .nav-links a::after{
      content:""; position:absolute; left:0; bottom:0; width:0; height:2px; border-radius:99px; background:linear-gradient(90deg,var(--blue),var(--blue2)); transition:.25s ease
    }
    .nav-links a:hover{color:var(--blue)}
    .nav-links a:hover::after{width:100%}
    .hero{
      padding:34px 0 18px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.35fr .85fr; gap:20px; align-items:stretch;
    }
    .hero-main,.hero-side,.section-card,.info-card,.review-card,.faq-item,.compare-wrap,.form-card,.article-card,.service-card,.timeline-item,.stats-card,.quote-card,.chip-card{
      background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,255,255,.92));
      border:1px solid rgba(217,226,242,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:30px; position:relative; overflow:hidden}
    .hero-main::before,.hero-main::after{
      content:""; position:absolute; border-radius:50%; filter:blur(8px); pointer-events:none
    }
    .hero-main::before{width:220px;height:220px; right:-70px; top:-70px; background:rgba(47,123,255,.15)}
    .hero-main::after{width:160px;height:160px; left:-55px; bottom:-60px; background:rgba(245,184,75,.14)}
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px; padding:8px 12px; border-radius:999px;
      background:rgba(19,87,214,.08); color:var(--blue3); font-size:13px; font-weight:700
    }
    h1{margin:18px 0 14px; font-size:clamp(30px,4vw,52px); line-height:1.08; letter-spacing:-.02em}
    .hero p{margin:0; color:var(--muted); line-height:1.8; font-size:16px}
    .hero-actions{display:flex; gap:12px; flex-wrap:wrap; margin-top:22px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:10px; border:none; cursor:pointer;
      padding:13px 18px; border-radius:14px; font-weight:700; font-size:15px; transition:.25s ease;
      box-shadow:0 10px 26px rgba(17,42,88,.12)
    }
    .btn-primary{background:linear-gradient(135deg,var(--blue),#0c79ff); color:#fff}
    .btn-secondary{background:#fff; color:var(--blue3); border:1px solid var(--line); box-shadow:none}
    .btn:hover{transform:translateY(-2px)}
    .hero-points{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:22px}
    .mini{
      padding:14px; border-radius:16px; background:linear-gradient(180deg, rgba(237,243,255,.92), rgba(255,255,255,.92)); border:1px solid rgba(217,226,242,.85)
    }
    .mini b{display:block; font-size:18px; color:var(--blue3)}
    .mini span{display:block; margin-top:5px; font-size:13px; color:var(--muted); line-height:1.5}
    .hero-side{padding:20px; display:flex; flex-direction:column; gap:14px}
    .side-top{display:flex; justify-content:space-between; gap:14px; align-items:flex-start}
    .side-top .tag{
      padding:8px 12px; border-radius:999px; background:rgba(245,184,75,.14); color:#8a5a00; font-weight:700; font-size:12px
    }
    .side-list{display:grid; gap:10px}
    .side-list div{
      padding:12px 14px; border-radius:14px; background:#f9fbff; border:1px solid var(--line); color:var(--text); font-size:14px; line-height:1.6
    }
    .section{padding:16px 0}
    .section-head{display:flex; align-items:end; justify-content:space-between; gap:16px; margin-bottom:14px}
    .section-head h2{margin:0; font-size:clamp(22px,2.6vw,34px)}
    .section-head p{margin:0; color:var(--muted); max-width:64ch; line-height:1.7}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .stats-card,.service-card,.review-card,.article-card,.chip-card,.quote-card{padding:18px}
    .stat-num{font-size:28px; font-weight:800; color:var(--blue3); margin-bottom:8px}
    .stat-label{font-size:14px; color:var(--muted); line-height:1.6}
    .service-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .service-card h3{margin:6px 0 10px; font-size:18px}
    .service-card p,.info-card p,.article-card p,.review-card p,.timeline-item p,.quote-card p{margin:0; color:var(--muted); line-height:1.75; font-size:14px}
    .badge{
      display:inline-flex; align-items:center; gap:6px; padding:7px 10px; border-radius:999px; background:rgba(19,87,214,.08); color:var(--blue3); font-size:12px; font-weight:700
    }
    .feature-list{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .info-card{padding:20px}
    .info-card h3{margin:10px 0 8px; font-size:18px}
    .info-card ul{margin:12px 0 0; padding-left:18px; color:var(--muted); line-height:1.8}
    .timeline{display:grid; gap:12px}
    .timeline-item{padding:18px}
    .timeline-item strong{display:block; margin-bottom:8px; color:var(--blue3); font-size:16px}
    .compare-wrap{padding:18px; overflow-x:auto}
    table{width:100%; border-collapse:collapse; min-width:860px}
    th,td{padding:14px 12px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top; font-size:14px; line-height:1.6}
    th{background:#f5f8ff; color:var(--blue3)}
    td{color:var(--muted)}
    .rating{font-weight:800; color:#f08a00}
    .columns-2{display:grid; grid-template-columns:1fr 1fr; gap:14px}
    .reviews-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .review-card .who{margin-top:14px; display:flex; justify-content:space-between; gap:8px; align-items:center; color:var(--blue3); font-weight:700}
    .stars{color:#f1aa00; letter-spacing:1px}
    .tags{display:flex; flex-wrap:wrap; gap:10px}
    .tag-pill{padding:10px 14px; border-radius:999px; background:#fff; border:1px solid var(--line); color:var(--text); font-size:14px}
    .articles-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .article-card h3{margin:10px 0 8px; font-size:18px}
    .article-card .meta{font-size:12px; color:var(--muted); margin-top:12px}
    .faq-list{display:grid; gap:12px}
    .faq-item{padding:0; overflow:hidden}
    .faq-q{
      width:100%; background:none; border:none; color:var(--text); text-align:left; padding:18px 20px; font-size:16px; font-weight:700; cursor:pointer;
      display:flex; align-items:center; justify-content:space-between; gap:14px
    }
    .faq-a{max-height:0; overflow:hidden; transition:max-height .3s ease; padding:0 20px}
    .faq-a p{margin:0; padding-bottom:18px; color:var(--muted); line-height:1.8}
    .faq-item.active .faq-a{max-height:180px}
    .faq-item.active .faq-q .arrow{transform:rotate(180deg)}
    .arrow{transition:.25s ease}
    .form-card{padding:22px}
    form{display:grid; gap:14px}
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    label{display:block; font-size:14px; font-weight:700; margin-bottom:8px; color:var(--text)}
    input,select,textarea{
      width:100%; border:1px solid var(--line); border-radius:14px; padding:13px 14px; font:inherit; color:var(--text); background:#fff; outline:none;
      transition:border-color .2s ease, box-shadow .2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(47,123,255,.75); box-shadow:0 0 0 4px rgba(47,123,255,.12)}
    textarea{min-height:130px; resize:vertical}
    .footer{
      margin-top:22px; padding:24px 0 18px; color:#dbe7ff; background:linear-gradient(135deg, #0b2b67 0%, #0f4ab8 52%, #173f93 100%)
    }
    .footer .container{color:#dbe7ff}
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr; gap:18px}
    .footer a{color:#fff}
    .footer small,.footer p,.footer li{color:#dbe7ff}
    .footer .links{display:flex; flex-wrap:wrap; gap:10px}
    .footer .link-chip{padding:8px 12px; border-radius:999px; background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.16)}
    .contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:14px; align-items:start}
    .contact-box{padding:18px; border-radius:18px; background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.14)}
    .contact-box img{border-radius:16px; background:#fff; padding:10px; width:160px}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px
    }
    .float-btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:12px 14px; border-radius:999px;
      background:#fff; color:var(--blue3); border:1px solid var(--line); box-shadow:0 12px 28px rgba(12,32,76,.14); font-weight:700
    }
    .backtop{position:fixed; right:16px; bottom:72px; z-index:60; opacity:0; pointer-events:none; transition:.25s ease}
    .backtop.show{opacity:1; pointer-events:auto}
    .animate{opacity:0; transform:translateY(18px); transition:all .65s ease}
    .animate.show{opacity:1; transform:none}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.service-grid,.reviews-grid,.articles-grid,.columns-2,.feature-list,.footer-grid,.contact-grid{grid-template-columns:1fr}
      .nav-links{display:none; position:absolute; left:16px; right:16px; top:72px; background:#fff; border:1px solid var(--line); border-radius:18px; padding:14px; box-shadow:var(--shadow)}
      .nav-links.open{display:grid}
      .menu-toggle{display:inline-flex}
      .hero-points,.form-grid{grid-template-columns:1fr}
      .mobile-only{display:block}
    }