:root{
    --brand: rgb(213, 5, 5);
    --brand-dark: rgb(180, 4, 4);
    --brand-soft: rgba(213, 5, 5, .08);
    --text: #1f1f1f;
    --muted: #666;
    --light: #f6f7f9;
    --line: #e8e8e8;
    --card: #fff;
    --shadow: 0 12px 28px rgba(0,0,0,.06);
    --radius: 18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","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(1180px, calc(100% - 32px));margin:0 auto}
.site-header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
.desktop-topbar,.desktop-nav-wrap{display:none}
.mobile-header{height:62px;background:#fff;display:grid;grid-template-columns:64px 1fr 88px;align-items:center;border-bottom:3px solid var(--brand-dark);position:sticky;top:0;z-index:40;padding:0 12px}
.menu-toggle{width:42px;height:42px;border:0;background:transparent;display:flex;flex-direction:column;justify-content:center;gap:5px;padding:0 8px;cursor:pointer}
.menu-toggle span{height:2px;width:24px;background:#222;border-radius:20px;transition:.2s}
.menu-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-logo{justify-self:center;display:flex;align-items:center;justify-content:center}
.mobile-logo img{max-height:38px;max-width:130px;object-fit:contain}
.top-action{display:inline-flex;align-items:center;justify-content:center;background:var(--brand);color:#fff;border-radius:999px;padding:9px 16px;font-weight:700;font-size:14px;line-height:1;box-shadow:0 8px 18px rgba(213,5,5,.18);white-space:nowrap}
.top-action:hover,.main-btn:hover{background:var(--brand-dark);transform:translateY(-1px)}
.mobile-nav{display:none;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 12px 20px rgba(0,0,0,.06);padding:8px 16px 14px;position:absolute;left:0;right:0;top:62px;z-index:35}
.mobile-nav.open{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.mobile-nav a{padding:12px 13px;border-radius:12px;background:#f7f7f7;color:#333;font-weight:700;font-size:14px}
.mobile-nav a.active{background:var(--brand-soft);color:var(--brand)}
.section{padding:52px 0}
.section.light{background:var(--light)}
.section-title{margin:0 0 12px;font-size:28px;line-height:1.28;letter-spacing:-.02em}
.section-lead{margin:0 0 24px;color:var(--muted);font-size:16px;max-width:760px}
.main-btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;background:var(--brand);color:#fff;padding:13px 24px;font-weight:800;transition:.2s;box-shadow:0 12px 22px rgba(213,5,5,.2)}
.ghost-link,.text-link{display:inline-flex;align-items:center;color:var(--brand);font-weight:800;margin-top:12px}
.ghost-link:after,.text-link:after{content:'›';margin-left:6px;font-size:20px;line-height:1}
.official-hero{background:linear-gradient(180deg,#fff 0%,#fafafa 100%);padding:42px 0 30px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;gap:28px;align-items:center}
.hero-label{display:inline-flex;align-items:center;border:1px solid rgba(213,5,5,.18);background:var(--brand-soft);color:var(--brand);font-weight:800;border-radius:999px;padding:6px 12px;font-size:13px;margin-bottom:14px}
.hero-title{font-size:34px;line-height:1.18;margin:0 0 16px;letter-spacing:-.03em;color:#151515}
.hero-text{color:#555;margin:0 0 22px;font-size:16px}
.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:7px 12px;color:#555;font-size:13px}
.hero-visual{position:relative;border-radius:24px;overflow:hidden;box-shadow:var(--shadow);background:#fff;border:1px solid var(--line)}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-note{display:grid;gap:10px;margin-top:24px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px;box-shadow:0 8px 20px rgba(0,0,0,.04)}
.hero-note strong{color:var(--brand)}
.category-main-grid{display:grid;gap:16px;margin-bottom:16px}
.category-sub-grid{display:grid;gap:12px}
.category-main-card,.category-sub-card,.focus-card,.info-box,.data-card,.security-card,.faq-item,.page-card,.notice-box,.step-card{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:238px;position:relative;overflow:hidden}
.category-main-card:before{content:'';position:absolute;right:-42px;top:-42px;width:120px;height:120px;background:var(--brand-soft);border-radius:50%}
.category-main-card h3,.category-sub-card h3,.focus-card h3,.info-box h3,.data-card h3,.security-card h3,.page-card h3,.step-card h3{margin:0 0 10px;font-size:20px;line-height:1.35}
.category-main-card p,.category-sub-card p,.focus-card p,.info-box p,.data-card p,.security-card p,.page-card p,.step-card p{margin:0;color:#5e5e5e}
.category-sub-card{padding:18px;min-height:178px}
.focus-grid{display:grid;gap:16px}
.focus-card{padding:20px;position:relative}
.card-kicker{display:inline-flex;background:var(--brand);color:#fff;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:800;margin-bottom:12px}
.info-split{display:grid;gap:20px;align-items:start}
.info-panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:var(--shadow)}
.info-panel h3{font-size:24px;margin:0 0 12px}
.info-list{display:grid;gap:12px;margin-top:16px}
.info-box{padding:16px}
.info-box h4{margin:0 0 6px;font-size:17px}
.info-box p{margin:0;color:#606060}
.info-visual{border-radius:20px;overflow:hidden;border:1px solid var(--line);margin-top:16px}
.showcase{display:grid;gap:24px;align-items:center}
.showcase .image-card{border-radius:22px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);background:#fff}
.feature-list{display:grid;gap:10px;margin:18px 0 0;padding:0;list-style:none}
.feature-list li{padding:12px 14px;border-left:4px solid var(--brand);background:#fff;border-radius:12px;color:#505050;box-shadow:0 6px 18px rgba(0,0,0,.04)}
.data-center{display:grid;gap:20px;align-items:center}
.data-card-grid{display:grid;gap:14px}
.data-card{padding:18px;background:#fff}
.data-card strong{display:block;color:var(--brand);font-size:26px;margin-bottom:4px}
.app-showcase{display:grid;gap:24px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:26px;padding:22px;box-shadow:var(--shadow)}
.app-showcase img{border-radius:22px;border:1px solid var(--line)}
.security-grid{display:grid;gap:14px}
.security-card{padding:18px}
.responsible-box{background:#fff;border:1px solid var(--line);border-left:6px solid var(--brand);border-radius:18px;padding:20px;box-shadow:0 8px 24px rgba(0,0,0,.04)}
.responsible-box p{margin:0;color:#555}
.faq-grid{display:grid;gap:14px}
.faq-item{padding:18px}
.faq-item h3{margin:0 0 8px;font-size:18px}
.faq-item p{margin:0;color:#5b5b5b}
.cta-band{background:linear-gradient(135deg,rgba(213,5,5,.08),#fff);border:1px solid rgba(213,5,5,.15);border-radius:24px;padding:26px;text-align:center;box-shadow:var(--shadow)}
.cta-band h2{margin:0 0 10px;font-size:26px}
.cta-band p{margin:0 auto 18px;color:#555;max-width:720px}
.page-hero{padding:42px 0;background:linear-gradient(180deg,#fff,#f8f8f8);border-bottom:1px solid var(--line)}
.page-hero h1{font-size:34px;line-height:1.2;margin:0 0 14px;color:#151515}
.page-hero p{margin:0;color:#555;max-width:820px;font-size:16px}
.breadcrumb{display:flex;gap:8px;flex-wrap:wrap;color:#777;font-size:13px;margin-bottom:14px}
.breadcrumb a{color:var(--brand);font-weight:700}
.content-layout{display:grid;gap:18px}
.page-card{padding:20px}
.page-card h2{margin:0 0 12px;font-size:24px}
.page-card ul,.notice-box ul{margin:12px 0 0;padding-left:20px;color:#555}
.page-card li,.notice-box li{margin:7px 0}
.page-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.page-links a{padding:9px 12px;border:1px solid var(--line);border-radius:999px;color:#444;background:#fff;font-weight:700}
.page-links a:hover{border-color:var(--brand);color:var(--brand)}
.notice-box{padding:18px;background:#fafafa;border-left:5px solid var(--brand)}
.steps-grid{display:grid;gap:14px;counter-reset:step}
.step-card{padding:18px;position:relative}
.step-card:before{counter-increment:step;content:counter(step);display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800;margin-bottom:10px}
.site-footer{background:#222;color:#eee;margin-top:0}
.footer-grid{display:grid;gap:24px;padding:36px 0}
.footer-logo{max-height:42px;margin-bottom:14px}
.site-footer p{color:#cfcfcf;margin:0}
.site-footer h3{margin:0 0 12px;color:#fff;font-size:18px}
.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,.1);padding:14px 0;color:#bbb;font-size:13px}
@media (min-width: 640px){
    .category-sub-grid,.security-grid,.data-card-grid,.steps-grid{grid-template-columns:repeat(2,1fr)}
    .focus-grid,.faq-grid{grid-template-columns:repeat(2,1fr)}
    .hero-note{grid-template-columns:1fr 1fr 1fr}
}
@media (min-width: 900px){
    .mobile-header,.mobile-nav{display:none!important}
    .desktop-topbar{display:block;background:var(--brand-dark);color:#fff;font-size:13px}
    .topbar-inner{height:38px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .desktop-nav-wrap{display:block;background:#fff;border-bottom:1px solid var(--line)}
    .desktop-nav{height:76px;display:flex;align-items:center;gap:24px}
    .desktop-logo img{max-height:48px;max-width:168px;object-fit:contain}
    .desktop-links{display:flex;align-items:center;gap:6px;flex:1;justify-content:center}
    .desktop-links a{padding:10px 12px;border-radius:999px;font-weight:800;color:#333;font-size:15px;white-space:nowrap}
    .desktop-links a.active,.desktop-links a:hover{background:var(--brand-soft);color:var(--brand)}
    .search-icon{width:36px;height:36px;border-radius:50%;border:1px solid var(--line);position:relative;display:inline-flex;flex:0 0 auto;background:#fff}
    .search-icon:before{content:'';position:absolute;width:12px;height:12px;border:2px solid var(--brand);border-radius:50%;left:9px;top:8px}
    .search-icon:after{content:'';position:absolute;width:8px;height:2px;background:var(--brand);transform:rotate(45deg);left:21px;top:22px;border-radius:2px}
    .desktop-action{padding:11px 20px}
    .section{padding:72px 0}
    .official-hero{padding:64px 0 42px}
    .hero-grid,.showcase,.data-center,.app-showcase{grid-template-columns:1.05fr .95fr}
    .hero-title{font-size:52px}
    .hero-text{font-size:18px}
    .category-main-grid{grid-template-columns:repeat(4,1fr)}
    .category-main-card:nth-child(1),.category-main-card:nth-child(4){min-height:278px}
    .category-sub-grid{grid-template-columns:repeat(4,1fr)}
    .focus-grid{grid-template-columns:repeat(4,1fr)}
    .info-split{grid-template-columns:1fr 1fr}
    .security-grid{grid-template-columns:repeat(3,1fr)}
    .faq-grid{grid-template-columns:repeat(2,1fr)}
    .content-layout{grid-template-columns:1fr 1fr}
    .content-layout.single{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr}
    .page-hero{padding:60px 0}
    .page-hero h1{font-size:46px}
}
@media (min-width: 1120px){
    .desktop-links a{padding:10px 15px}
}