:root{--primary: #1d4ed8;--primary-dark: #1e40af;--primary-light: #3b82f6;--accent: #06b6d4;--ink: #0f172a;--ink-soft: #334155;--muted: #64748b;--line: #e2e8f0;--bg: #ffffff;--bg-alt: #f6f8fc;--bg-dark: #0b1220;--radius: 16px;--radius-sm: 10px;--shadow: 0 10px 30px -12px rgba(15, 23, 42, .18);--shadow-lg: 0 24px 60px -24px rgba(15, 23, 42, .28);--container: 1160px;--transition: .25s cubic-bezier(.4, 0, .2, 1)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:PingFang SC,Microsoft YaHei,Hiragino Sans GB,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden}img,svg{display:block;max-width:100%}a{color:inherit;text-decoration:none}ul{list-style:none}.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 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li>span{font-size:13px;color:#fff9;margin-top:4px}.hero-visual{position:relative;height:360px}.cloud-card{position:absolute;display:flex;align-items:center;gap:10px;padding:18px 22px;background:#ffffff0f;border:1px solid rgba(255,255,255,.14);border-radius:16px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);font-weight:600;font-size:15px;box-shadow:var(--shadow-lg);animation:float 6s ease-in-out infinite}.cloud-card svg{width:26px;height:26px;color:#60a5fa}.cloud-card-1{top:20px;left:6%;animation-delay:0s}.cloud-card-2{top:140px;right:4%;animation-delay:1.5s}.cloud-card-3{bottom:10px;left:14%;animation-delay:3s}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-16px)}}.section{padding:96px 0}.section-alt{background:var(--bg-alt)}.section-head{max-width:640px;margin:0 auto 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strong{color:var(--primary);font-weight:700;flex-shrink:0;width:44px}.about-visual{position:relative;height:360px}.about-card{position:absolute;padding:28px;border-radius:var(--radius);background:linear-gradient(135deg,#1d4ed8,#0ea5e9);color:#fff;font-size:22px;font-weight:700;line-height:1.4;box-shadow:var(--shadow-lg)}.about-card span{display:block;font-size:13px;font-weight:500;letter-spacing:2px;opacity:.85;margin-top:6px}.about-card-1{top:30px;left:8%;transform:rotate(-4deg)}.about-card-2{bottom:20px;right:6%;transform:rotate(3deg)}.advantages-grid{grid-template-columns:repeat(4,1fr)}.advantage-card{position:relative;overflow:hidden}.advantage-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}.advantage-num{font-size:42px;font-weight:800;line-height:1;color:#1d4ed826;margin-bottom:16px}.advantage-card h3{font-size:18px;font-weight:700;margin-bottom:10px}.advantage-card p{font-size:14.5px;color:var(--muted)}.beian-grid{grid-template-columns:repeat(2,1fr);max-width:860px;margin:0 auto}.beian-card{text-align:left}.beian-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}.beian-icon{width:60px;height:60px;display:grid;place-items:center;border-radius:14px;background:linear-gradient(135deg,#1d4ed8,#06b6d4);color:#fff;font-size:20px;font-weight:800;letter-spacing:1px;margin-bottom:18px}.beian-icon-alt{background:linear-gradient(135deg,#0f766e,#14b8a6)}.beian-card h3{font-size:20px;font-weight:700;margin-bottom:12px}.beian-card p{font-size:15px;color:var(--muted);margin-bottom:18px}.section-contact{background:radial-gradient(900px 500px at 10% 100%,rgba(29,78,216,.12),transparent 60%),var(--bg-alt)}.contact-inner{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}.contact-info h2{font-size:clamp(26px,3.5vw,36px);font-weight:800;line-height:1.3;margin-bottom:16px}.contact-info>p{color:var(--muted);margin-bottom:30px}.contact-list{display:flex;flex-direction:column;gap:20px}.contact-list li{display:flex;gap:14px;align-items:flex-start}.contact-ico{flex-shrink:0;width:42px;height:42px;display:grid;place-items:center;font-size:20px;background:#fff;border:1px solid var(--line);border-radius:12px}.contact-list div{display:flex;flex-direction:column}.contact-list strong{font-size:15px;color:var(--ink)}.contact-list span{font-size:14px;color:var(--muted)}.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.form-field{margin-bottom:16px}.form-field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}.form-field label em{color:#ef4444;font-style:normal}.form-field input,.form-field select,.form-field textarea{width:100%;padding:12px 14px;font-size:15px;font-family:inherit;color:var(--ink);background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius-sm);outline:none;transition:var(--transition)}.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px #1d4ed81f}.form-field textarea{resize:vertical}.form-tip{margin-top:12px;font-size:14px;color:#16a34a;text-align:center;min-height:20px}.form-tip.error{color:#ef4444}.site-footer{background:var(--bg-dark);color:#ffffffb8}.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-top:64px;padding-bottom:48px}.brand-light .brand-text strong{color:#fff}.brand-light .brand-text small{color:#ffffff8c}.footer-brand>p{margin-top:18px;font-size:14px;line-height:1.8;color:#ffffff8c}.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px}.footer-col 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80px}.hero-inner{grid-template-columns:1fr;gap:40px}.hero-visual{height:260px}.about-inner,.contact-inner{grid-template-columns:1fr;gap:40px}.about-visual{height:260px}.beian-grid{grid-template-columns:1fr}.nav-toggle{display:flex}.main-nav{position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:4px;padding:16px 24px 24px;background:#fffffffa;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);box-shadow:0 20px 40px -20px #0f172a4d;transform:translateY(-12px);opacity:0;visibility:hidden;transition:var(--transition)}.main-nav.open{transform:translateY(0);opacity:1;visibility:visible}.main-nav .nav-link{color:var(--ink-soft);padding:12px 14px}.main-nav .nav-link:hover{color:var(--primary)}.nav-cta{margin:8px 0 0;justify-content:center}}@media (max-width: 560px){.services-grid,.advantages-grid,.form-row{grid-template-columns:1fr}.hero-stats{gap:24px}.hero-stats strong{font-size:28px}.footer-inner{grid-template-columns:1fr;gap:32px}.footer-beian-inner{flex-direction:column;align-items:flex-start}.section{padding:72px 0}.cloud-card{padding:14px 16px;font-size:13px}}