:root{--bg:#E6EBF2;--nav:#F5F7FB;--white:#FFFFFF;--soft:#EEF2F7;--line:#DDE4EE;--blue:#289CFF;--text:#243447;--muted:#66788A;--hint:#8A9AAF;--footer:#243447;--shadow:0 14px 36px rgba(56,92,138,.12);--border:rgba(40,156,255,.16);--btn:linear-gradient(180deg,#32D1F6 0%,#27B9F4 35%,#249BFF 100%)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}a{text-decoration:none;color:inherit}img{max-width:100%;display:block}.site-header{position:sticky;top:0;z-index:9999;background:var(--nav);backdrop-filter:blur(10px);box-shadow:0 8px 24px rgba(56,92,138,.10)}.header-inner{max-width:1220px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px;padding:0 20px}.logo{flex:0 0 auto;display:flex;align-items:center}.logo img{max-height:52px;width:auto}.nav-wrap{flex:1 1 auto;min-width:0;display:flex;justify-content:center}.nav{display:flex;align-items:center;gap:18px;white-space:nowrap;flex-wrap:nowrap}.nav a{color:#4E5F7A;font-weight:700;font-size:15px;position:relative;padding:23px 0}.nav a:hover,.nav 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@media(max-width:480px){.banner-slider{height:170px;border-radius:16px}.logo img{max-height:40px}.header-action .main-btn{padding:0 13px;font-size:14px}.page-hero{padding:22px 16px}.card,.zone-card,.info-card,.review-card,.faq-item,.hero-card{padding:18px}.step-card{display:block;padding:62px 16px 18px}.step-card:before{left:16px;top:16px}.product-img{height:120px}.feature-img{height:180px}}