:root{--primary: #2563EB;--primary-light: #3b82f6;--primary-dark: #1d4ed8;--bg-light: #D6E3FF;--bg-white: #ffffff;--text-dark: #1E293B;--text-muted: #64748B;--text-muted2: #94a3b8;--border: rgba(30, 41, 59, .12);--radius: 12px;--radius2: 16px;--max: 1120px;--pad: 20px;--font: ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji"}*{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:var(--font);color:var(--text-dark);background:var(--bg-white)}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--pad)}.topbar{position:sticky;top:0;z-index:40;background:var(--bg-white);border-bottom:1px solid var(--border);box-shadow:0 1px 3px #0000000a}.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:64px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--text-dark)}.logo-img{width:40px;height:40px;display:block;object-fit:contain}.nav{display:flex;gap:8px;align-items:center}.nav a{padding:8px 14px;border-radius:8px;color:var(--text-muted);font-weight:550;transition:color .18s ease,background .18s ease}.nav a:hover{color:var(--primary);background:#2563eb14}.hero{padding:64px 0 80px;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 50%,#1e3a8a 100%);color:#fff}.hero .container{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}.hero-title{font-size:48px;font-weight:800;line-height:1.1;margin:0 0 16px;letter-spacing:-.5px}.hero-desc{font-size:18px;line-height:1.7;color:#ffffffeb;margin:0 0 24px}.hero-platform{font-size:13px;color:#ffffffb8;margin:0 0 24px}.hero .btn-download{display:inline-flex;align-items:center;padding:14px 28px;border-radius:12px;background:#fff;color:var(--primary);font-weight:700;font-size:16px;box-shadow:0 4px 20px #00000026;transition:transform .18s ease,box-shadow .18s ease}.hero .btn-download:hover{transform:translateY(-2px);box-shadow:0 8px 28px #0003}.hero-visual{position:relative;display:flex;align-items:center;justify-content:center;padding:20px}.hero-visual:before{content:"";position:absolute;inset:-15%;background:radial-gradient(ellipse at center,rgba(255,255,255,.08) 0%,rgba(37,99,235,.2) 45%,transparent 75%);pointer-events:none}.hero-visual-img{position:relative;z-index:1;max-width:100%;width:420px;height:auto;object-fit:contain;border-radius:24px;box-shadow:0 0 80px #2563eb4d,0 0 140px #3b82f626,0 25px 50px #0000001f;mask-image:radial-gradient(ellipse 95% 95% at 50% 50%,black 72%,transparent 100%);-webkit-mask-image:radial-gradient(ellipse 95% 95% at 50% 50%,black 72%,transparent 100%)}.section-features{padding:72px 0;background:#f8fafc}.section-features h2{text-align:center;font-size:28px;font-weight:700;margin:0 0 48px;color:var(--text-dark)}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.feature-card{background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius2);padding:24px;transition:box-shadow .2s ease,transform .2s ease}.feature-card:hover{box-shadow:0 8px 24px #2563eb1a;transform:translateY(-2px)}.feature-icon{width:40px;height:40px;border-radius:10px;background:#2563eb1a;margin-bottom:16px;display:flex;align-items:center;justify-content:center;font-size:20px}.feature-card h3{font-size:17px;font-weight:700;margin:0 0 8px;color:var(--text-dark)}.feature-card p{margin:0;font-size:14px;line-height:1.65;color:var(--text-muted)}.section{padding:48px 0}.section h2{margin:0 0 16px;font-size:24px;font-weight:700;color:var(--text-dark)}.section p.lead{margin:0 0 24px;color:var(--text-muted);line-height:1.7}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{border:1px solid var(--border);background:var(--bg-white);border-radius:var(--radius2);padding:20px;transition:box-shadow .2s ease}.card:hover{box-shadow:0 4px 16px #2563eb14}.card h3{margin:0 0 8px;font-size:16px;font-weight:700;color:var(--text-dark)}.card p{margin:0;color:var(--text-muted);line-height:1.65;font-size:14px}.split{display:grid;grid-template-columns:1fr 1fr;gap:24px}.faq details{border:1px solid var(--border);background:#f8fafc;border-radius:var(--radius2);padding:14px 18px}.faq details+details{margin-top:12px}.faq summary{cursor:pointer;font-weight:650;color:var(--text-dark)}.faq p{margin:10px 0 0;color:var(--text-muted);line-height:1.7}.btn{display:inline-flex;align-items:center;padding:10px 18px;border-radius:10px;border:1px solid var(--border);background:var(--bg-white);color:var(--text-dark);font-weight:600;transition:all .18s ease}.btn:hover{background:#f1f5f9}.btn.primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn.primary:hover{background:var(--primary-dark)}.cta-row{display:flex;gap:12px;flex-wrap:wrap}.footer{padding:48px 0 32px;margin-top:0;border-top:1px solid var(--border);background:#f8fafc;color:var(--text-muted)}.footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:32px}.footer .brand{color:var(--text-dark)}.footer a{color:var(--text-muted)}.footer a:hover{color:var(--primary)}.kicker{font-size:14px;color:var(--text-muted2)}.doc{padding:40px 0 56px}.doc h1{margin:0 0 16px;font-size:28px;color:var(--text-dark)}.doc p,.doc ul{color:var(--text-muted);line-height:1.8}@media(max-width:920px){.hero .container{grid-template-columns:1fr;text-align:center}.hero-visual{order:-1}.hero-title{font-size:36px}.features-grid,.grid-3,.split,.footer-grid{grid-template-columns:1fr}}@media(max-width:520px){.container{padding:0 16px}.topbar-inner{height:auto;padding:14px 0;flex-wrap:wrap;row-gap:10px}.brand{font-size:16px}.logo-img{width:34px;height:34px}.nav{width:100%;justify-content:flex-start;flex-wrap:wrap;gap:6px}.nav a{padding:7px 12px;font-size:14px}.hero{padding:40px 0 56px}.hero-title{font-size:32px}.hero-desc{font-size:16px;line-height:1.65}.hero-platform{font-size:12px}.section-features{padding:56px 0}.section-features h2{font-size:24px;margin-bottom:28px}.feature-card{padding:18px}.feature-card h3{font-size:16px}.feature-card p{font-size:14px;line-height:1.7}}
