:root{--ink:#0a1628;--muted:#4b5563;--line:#eef2f6;--blue:#2563eb;--bg:#fff;--soft:#f8faff}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.navbar{padding:18px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap}
.logo{font-size:24px;font-weight:700;color:var(--ink);text-decoration:none}
.logo span{color:var(--blue)}
.nav-links a{margin-left:32px;font-size:15px;color:var(--muted);text-decoration:none;font-weight:500}
.nav-links a:hover{color:var(--blue)}
.nav-links .btn-nav{background:var(--blue);color:#fff!important;padding:8px 20px;border-radius:6px}
.hero{padding:80px 0 70px;text-align:center;background:linear-gradient(180deg,var(--soft),#fff)}
.hero h1,.page-hero h1{font-size:48px;font-weight:700;color:var(--ink)}
.hero h1 span{color:var(--blue)}
.hero p,.page-hero p{font-size:18px;color:var(--muted);max-width:680px;margin:16px auto 28px}
.page-hero{padding:64px 0 36px;background:var(--soft);border-bottom:1px solid var(--line)}
.btn-group{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn-primary,.btn-outline{display:inline-block;padding:12px 36px;border-radius:8px;text-decoration:none;font-weight:600}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:#1d4ed8}
.btn-outline{border:1.5px solid #d1d5db;color:var(--muted);font-weight:500}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}
.trust-bar{padding:32px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;justify-content:center;flex-wrap:wrap;gap:40px 60px}
.trust-bar span{color:#6b7280;font-size:14px;font-weight:500}
.section-title{text-align:center;padding:60px 0 12px}
.section-title h2,.prose h2{font-size:32px;font-weight:700}
.section-title p,.prose p,.prose li{color:var(--muted)}
.card-grid,.page-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;padding:28px 0 56px}
.card{background:#fafbfc;border:1px solid var(--line);border-radius:12px;padding:32px 28px}
.card:hover{box-shadow:0 8px 24px rgba(0,0,0,.06);transform:translateY(-2px)}
.card .icon{font-size:36px;margin-bottom:12px}
.card h3{font-size:18px;font-weight:600}
.card p,.card li{font-size:14px;color:#6b7280}
.card .learn-more{display:inline-block;margin-top:12px;color:var(--blue);font-weight:500;text-decoration:none}
.prose{max-width:860px;margin:0 auto;padding:36px 0 64px}
.prose h2{font-size:24px;margin:28px 0 10px}
.prose ul{padding-left:20px}
.updates-section{background:var(--soft);padding:48px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.updates-section h3{text-align:center;font-size:24px;font-weight:700;margin-bottom:20px}
.updates-list{max-width:800px;margin:0 auto;list-style:none}
.updates-list li{display:flex;align-items:baseline;gap:16px;padding:12px 0;border-bottom:1px solid var(--line);font-size:15px}
.updates-list li:last-child{border-bottom:none}
.updates-list .date{flex-shrink:0;background:var(--line);color:var(--muted);font-size:13px;font-weight:600;padding:2px 12px;border-radius:12px}
.updates-list .content strong{color:var(--ink)}
.about-section{padding:48px 0;border-top:1px solid var(--line)}
.about-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px}
.about-grid h4{font-size:15px;margin-bottom:8px}
.about-grid p,.about-grid li{font-size:14px;color:#6b7280;list-style:none;padding:2px 0}
.footer{text-align:center;padding:28px 0 32px;border-top:1px solid var(--line);color:#9ca3af;font-size:13px}
.footer a{color:#6b7280;text-decoration:none}
.footer a:hover{color:var(--blue)}
.footer .update-time{display:inline-block;margin-top:6px;background:#f3f4f6;padding:4px 16px;border-radius:20px;font-size:12px;color:#6b7280}
@media(max-width:768px){.navbar{flex-direction:column;align-items:flex-start}.nav-links a{margin-left:0;margin-right:18px}.hero h1,.page-hero h1{font-size:32px}.updates-list li{flex-direction:column;gap:4px}}
@media(max-width:480px){.hero h1,.page-hero h1{font-size:26px}.btn-primary,.btn-outline{padding:10px 24px;font-size:14px}}