*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary: #1a73e8;--primary-dark: #1557b0;--primary-light: #e8f0fe;--accent: #0ea5e9;--text: #1f2937;--text-secondary: #6b7280;--bg: #ffffff;--bg-alt: #f8fafc;--bg-dark: #0f172a;--border: #e5e7eb;--radius: 12px;--shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);--shadow-lg: 0 10px 40px rgba(0,0,0,.08);--max-width: 1200px}html{scroll-behavior:smooth;font-size:16px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-dark)}img{max-width:100%;display:block}.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}.section{padding:100px 0}.section-title{font-size:2.25rem;font-weight:700;text-align:center;margin-bottom:16px;letter-spacing:-.5px}.section-subtitle{font-size:1.125rem;color:var(--text-secondary);text-align:center;max-width:600px;margin:0 auto 64px}.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:8px;font-size:1rem;font-weight:600;border:none;cursor:pointer;transition:all .2s;white-space:nowrap}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px #1a73e84d}.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}.btn-outline:hover{background:var(--primary-light)}.btn-white{background:#fff;color:var(--primary)}.btn-white:hover{background:#f1f5f9}.header{position:fixed;top:0;left:0;right:0;z-index:100;background:#ffffffd9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:box-shadow .3s}.header.scrolled{box-shadow:var(--shadow)}.header .container{display:flex;align-items:center;justify-content:space-between;height:72px}.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--text)}.logo-icon{width:36px;height:36px;background:var(--primary);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem}.nav{display:flex;align-items:center;gap:32px}.nav a{color:var(--text-secondary);font-size:.95rem;font-weight:500;transition:color .2s}.nav a:hover{color:var(--primary)}.nav-cta{display:flex;align-items:center;gap:12px}.hero{padding:160px 0 120px;background:linear-gradient(135deg,#f0f7ff,#e8f4fd,#f8fafc);overflow:hidden}.hero .container{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}.hero h1{font-size:3.5rem;font-weight:800;line-height:1.15;margin-bottom:24px;letter-spacing:-1px}.hero h1 span{color:var(--primary)}.hero p{font-size:1.2rem;color:var(--text-secondary);margin-bottom:40px;max-width:480px;line-height:1.8}.hero-actions{display:flex;gap:16px}.hero-visual{position:relative}.hero-visual img{border-radius:16px;box-shadow:var(--shadow-lg);width:100%}.features{background:var(--bg)}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.feature-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:32px;transition:all .3s;cursor:default}.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary-light)}.feature-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:20px}.feature-card h3{font-size:1.125rem;font-weight:700;margin-bottom:8px}.feature-card p{font-size:.925rem;color:var(--text-secondary);line-height:1.7}.solutions{background:var(--bg-alt)}.solutions-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.solution-card{background:var(--bg);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);transition:all .3s}.solution-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.solution-img{height:180px;background:linear-gradient(135deg,var(--primary-light),#dbeafe);display:flex;align-items:center;justify-content:center;font-size:3rem}.solution-body{padding:24px}.solution-body h3{font-size:1.125rem;font-weight:700;margin-bottom:8px}.solution-body p{font-size:.9rem;color:var(--text-secondary);line-height:1.7}.download-section{background:#fff}.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:960px;margin:0 auto}.download-card{display:flex;flex-direction:column;align-items:center;text-align:center;padding:40px 24px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg);box-shadow:var(--shadow);transition:all .25s;color:var(--text)}.download-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary)}.download-icon{font-size:2.6rem;margin-bottom:12px}.download-card h3{font-size:1.25rem;margin-bottom:8px}.download-card p{color:var(--text-secondary);font-size:.95rem;margin-bottom:20px}.download-tip{text-align:center;color:var(--text-secondary);font-size:.9rem;margin-top:28px}.cta{background:linear-gradient(135deg,var(--primary) 0%,var(--accent) 100%);color:#fff;text-align:center}.cta .section-title{color:#fff}.cta .section-subtitle{color:#fffc}.cta .btn-white{margin-top:16px}.footer{background:var(--bg-dark);color:#94a3b8;padding:64px 0 32px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1.5fr;gap:48px;margin-bottom:48px}.footer-brand .logo{color:#fff;margin-bottom:16px}.footer-brand p{font-size:.9rem;line-height:1.7}.footer-brand .brand-company{color:#fff;font-weight:600}.footer-col h4{color:#fff;font-size:.95rem;font-weight:600;margin-bottom:16px}.footer-col a{display:block;color:#94a3b8;font-size:.9rem;margin-bottom:10px;transition:color .2s}.footer-col a:hover{color:#fff}.footer-col .footer-contact{font-size:.9rem;line-height:1.7;margin:0 0 8px}.footer-bottom{border-top:1px solid #1e293b;padding-top:24px;text-align:center;font-size:.85rem}.footer-bottom .footer-beian{margin-top:8px}.footer-beian a{display:inline-flex;align-items:center;gap:6px;color:#94a3b8}.footer-beian a:hover{color:#fff}.beian-icon{width:20px;height:20px;display:inline-block;vertical-align:middle}.menu-btn{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text)}@media(max-width:768px){.section{padding:64px 0}.section-title{font-size:1.75rem}.hero{padding:120px 0 80px}.hero .container{grid-template-columns:1fr;gap:40px}.hero h1{font-size:2.25rem}.hero-visual{display:none}.features-grid,.solutions-grid,.download-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.nav{display:none}.menu-btn{display:block}.nav.open{display:flex;flex-direction:column;position:absolute;top:72px;left:0;right:0;background:#fff;padding:24px;border-bottom:1px solid var(--border);box-shadow:var(--shadow)}}