:root{
  --primary: rgb(213, 5, 5);
  --primary-dark: rgb(180, 4, 4);
  --text: #191919;
  --muted: #666;
  --light: #f6f7f9;
  --line: #e9e9e9;
  --card: #fff;
  --shadow: 0 12px 30px rgba(0,0,0,.07);
  --radius: 18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:#fff;line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:min(1120px,calc(100% - 32px));margin:0 auto}
.site-header{position:relative;z-index:10;background:#fff;box-shadow:0 2px 16px rgba(0,0,0,.06)}
.desktop-topbar,.desktop-header{display:none}
.mobile-header{height:62px;background:#fff;display:grid;grid-template-columns:68px 1fr 86px;align-items:center;border-bottom:3px solid var(--primary-dark);padding:0 12px}
.mobile-logo{justify-self:center}.mobile-logo img{height:34px;object-fit:contain}.desktop-logo img{height:42px;object-fit:contain}.footer-logo{height:38px;margin-bottom:12px;object-fit:contain}
.menu-toggle{width:44px;height:44px;border:0;background:transparent;display:flex;flex-direction:column;justify-content:center;gap:5px;padding:8px;cursor:pointer}.menu-toggle span{display:block;width:24px;height:2px;background:#222;border-radius:4px;transition:.25s}.menu-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}.menu-toggle.open span:nth-child(2){opacity:0}.menu-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.top-action{display:inline-flex;align-items:center;justify-content:center;min-height:36px;padding:0 16px;background:var(--primary);color:#fff;border-radius:999px;font-weight:700;font-size:14px;box-shadow:0 6px 16px rgba(213,5,5,.18);white-space:nowrap}.top-action:hover,.main-btn:hover{background:#b90404;transform:translateY(-1px)}
.mobile-nav{display:none;background:#fff;border-bottom:1px solid var(--line);padding:10px 16px 14px}.mobile-nav.open{display:grid;grid-template-columns:1fr 1fr;gap:8px}.mobile-nav a{padding:10px 12px;border-radius:12px;background:#f7f7f7;font-size:14px}.mobile-nav a.active{background:rgba(213,5,5,.08);color:var(--primary);font-weight:700}
main{background:#fff}.section{padding:58px 0}.section.alt{background:var(--light)}.section-title{margin:0 0 14px;font-size:28px;line-height:1.25}.section-lead{margin:0 0 26px;color:var(--muted);max-width:760px}.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--primary);background:rgba(213,5,5,.08);padding:6px 12px;border-radius:999px;margin-bottom:14px}
.main-btn{display:inline-flex;align-items:center;justify-content:center;background:var(--primary);color:#fff;border-radius:999px;padding:13px 24px;font-weight:800;box-shadow:0 12px 24px rgba(213,5,5,.2);transition:.2s;min-height:48px}.link-btn{display:inline-flex;align-items:center;font-weight:800;color:var(--primary);margin-top:14px}.link-btn:after{content:'›';font-size:20px;margin-left:6px}
.official-hero{background:linear-gradient(180deg,#fff 0%,#f7f7f7 100%);padding:34px 0 52px}.hero-grid{display:grid;gap:28px;align-items:center}.hero-copy h1{font-size:36px;line-height:1.12;margin:0 0 16px;letter-spacing:-.5px}.hero-copy p{margin:0 0 20px;color:#4b4b4b}.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.hero-tags span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 12px;font-size:13px;color:#444}.hero-visual{position:relative;background:#fff;border-radius:28px;padding:14px;box-shadow:var(--shadow);overflow:hidden}.hero-visual:before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(213,5,5,.12),rgba(255,255,255,0));pointer-events:none}.hero-visual img{border-radius:22px;min-height:220px;object-fit:cover;width:100%}
.category-main-grid{display:grid;gap:16px}.category-sub-grid{display:grid;gap:14px;margin-top:14px}.category-main-card,.category-sub-card,.focus-card,.info-card,.data-card,.security-card,.page-card,.faq-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 22px rgba(0,0,0,.04)}.category-main-card{padding:22px;min-height:230px;position:relative;overflow:hidden}.category-main-card:before{content:'';position:absolute;right:-42px;top:-42px;width:120px;height:120px;border-radius:50%;background:rgba(213,5,5,.08)}.category-sub-card{padding:18px}.category-main-card h3,.category-sub-card h3,.focus-card h3,.info-card h3,.data-card h3,.security-card h3,.page-card h3{margin:0 0 10px;font-size:20px}.category-main-card p,.category-sub-card p,.focus-card p,.info-card p,.data-card p,.security-card p,.page-card p{margin:0;color:#555}
.focus-grid{display:grid;gap:16px}.focus-card{padding:20px;position:relative}.label{display:inline-block;background:var(--primary);color:#fff;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:700;margin-bottom:12px}.info-split{display:grid;gap:18px}.info-column{background:#fff;border:1px solid var(--line);border-radius:24px;padding:20px;box-shadow:var(--shadow)}.info-column.with-image{display:grid;gap:18px}.info-column img{border-radius:18px;object-fit:cover;width:100%;max-height:240px}.info-list{display:grid;gap:12px}.info-card{padding:16px}.showcase,.app-showcase,.data-center{display:grid;gap:24px;align-items:center}.showcase-image,.app-image,.data-image{border-radius:24px;background:#fff;padding:12px;box-shadow:var(--shadow)}.showcase-image img,.app-image img,.data-image img{border-radius:18px;object-fit:cover;width:100%;max-height:340px}.check-list{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:10px}.check-list li{position:relative;padding-left:28px;color:#444}.check-list li:before{content:'✓';position:absolute;left:0;top:0;color:var(--primary);font-weight:900}.data-card-grid{display:grid;gap:14px;margin-top:18px}.data-card{padding:18px}.data-card strong{display:block;font-size:24px;color:var(--primary);margin-bottom:6px}.security-grid{display:grid;gap:16px}.security-card{padding:18px}.responsible-box{background:#fff;border-left:5px solid var(--primary);border-radius:18px;padding:22px;box-shadow:var(--shadow)}.responsible-box p{margin:0 0 12px;color:#444}.faq-list{display:grid;gap:14px}.faq-item{padding:18px}.faq-item h3{margin:0 0 8px;font-size:18px}.faq-item p{margin:0;color:#555}.cta-box{background:linear-gradient(135deg,rgba(213,5,5,.08),#fff);border:1px solid rgba(213,5,5,.16);border-radius:28px;padding:28px;text-align:center}.cta-box h2{margin:0 0 10px}.cta-box p{color:#555;margin:0 auto 18px;max-width:720px}.site-footer{background:#202020;color:#efefef}.footer-grid{display:grid;gap:24px;padding:42px 0}.site-footer p{color:#cfcfcf;margin:0}.site-footer h3{font-size:17px;margin:0 0 12px}.site-footer a{display:block;color:#d8d8d8;margin:7px 0}.site-footer a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:14px 0;color:#cfcfcf;font-size:14px}.breadcrumb{padding:16px 0;color:#777;font-size:14px}.breadcrumb a{color:var(--primary)}.page-hero{padding:42px 0;background:linear-gradient(180deg,#fff,#f8f8f8)}.page-hero h1{font-size:34px;line-height:1.18;margin:0 0 14px}.page-hero p{color:#555;max-width:800px;margin:0}.page-grid{display:grid;gap:16px}.page-card{padding:20px}.notice-list{background:#f7f7f7;border:1px solid var(--line);border-radius:20px;padding:20px}.notice-list h2{margin-top:0}.notice-list ul{margin:0;padding-left:20px;color:#444}.related-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.related-links a{border:1px solid var(--line);border-radius:999px;padding:8px 13px;color:#444;background:#fff}.related-links a:hover{border-color:var(--primary);color:var(--primary)}.steps{counter-reset:step;display:grid;gap:14px}.step{counter-increment:step;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px 18px 18px 66px;position:relative}.step:before{content:counter(step);position:absolute;left:18px;top:18px;width:34px;height:34px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900}.two-col{display:grid;gap:18px}.search-icon{width:22px;height:22px;display:inline-block;position:relative;border:2px solid #333;border-radius:50%}.search-icon:after{content:'';width:8px;height:2px;background:#333;position:absolute;right:-6px;bottom:0;transform:rotate(45deg);border-radius:2px}.small-note{font-size:14px;color:#777;margin-top:10px}
@media (min-width:700px){.category-sub-grid,.focus-grid,.security-grid,.page-grid,.data-card-grid{grid-template-columns:repeat(2,1fr)}.hero-copy h1{font-size:44px}.two-col{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:2fr 1fr 1fr 1.6fr}}
@media (min-width:960px){.mobile-header,.mobile-nav{display:none}.desktop-topbar{display:block;background:var(--primary-dark);color:#fff;font-size:13px}.topbar-inner{height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}.desktop-header{display:block;background:#fff}.desktop-header-inner{height:78px;display:flex;align-items:center;gap:24px}.desktop-nav{display:flex;align-items:center;gap:4px;flex:1;justify-content:center}.desktop-nav a{padding:11px 13px;border-radius:999px;font-weight:700;color:#303030}.desktop-nav a.active,.desktop-nav a:hover{background:rgba(213,5,5,.08);color:var(--primary)}.header-tools{display:flex;align-items:center;gap:18px}.official-hero{padding:62px 0}.hero-grid{grid-template-columns:1.02fr .98fr;gap:44px}.hero-copy h1{font-size:52px}.category-main-grid{grid-template-columns:repeat(4,1fr)}.category-sub-grid{grid-template-columns:repeat(4,1fr)}.category-main-card{min-height:270px}.focus-grid{grid-template-columns:repeat(4,1fr)}.info-split{grid-template-columns:1fr 1fr}.info-column.with-image{grid-template-columns:1fr 220px;align-items:center}.showcase,.app-showcase,.data-center{grid-template-columns:1fr 1fr;gap:46px}.data-center.reverse{grid-template-columns:1.05fr .95fr}.security-grid{grid-template-columns:repeat(3,1fr)}.page-grid{grid-template-columns:repeat(3,1fr)}.section{padding:74px 0}.page-hero{padding:58px 0}.page-hero h1{font-size:44px}.faq-list.two{grid-template-columns:1fr 1fr}.showcase-image.order-left{order:-1}}